drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/ieee80211_radiotap.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #include "iwl-3945.h"
  50 #include "iwl-helpers.h"
  51
  52 #ifdef CONFIG_IWL3945_DEBUG
  53 u32 iwl3945_debug_level;
  54 #endif
  55
  56 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  57                                   struct iwl3945_tx_queue *txq);
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /* module parameters */
  66 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  67 static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  68 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  69 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  70 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  71 static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
  72 int iwl3945_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION \
  80 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  81
  82 #ifdef CONFIG_IWL3945_DEBUG
  83 #define VD "d"
  84 #else
  85 #define VD
  86 #endif
  87
  88 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  89 #define VS "s"
  90 #else
  91 #define VS
  92 #endif
  93
  94 #define IWLWIFI_VERSION "1.2.23k" VD VS
  95 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
  96 #define DRV_VERSION     IWLWIFI_VERSION
  97
  98 /* Change firmware file name, using "-" and incrementing number,
  99  *   *only* when uCode interface or architecture changes so that it
 100  *   is not compatible with earlier drivers.
 101  * This number will also appear in << 8 position of 1st dword of uCode file */
 102 #define IWL3945_UCODE_API "-1"
 103
 104 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 105 MODULE_VERSION(DRV_VERSION);
 106 MODULE_AUTHOR(DRV_COPYRIGHT);
 107 MODULE_LICENSE("GPL");
 108
 109 static __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 110 {
 111         u16 fc = le16_to_cpu(hdr->frame_control);
 112         int hdr_len = ieee80211_get_hdrlen(fc);
 113
 114         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 115                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 116         return NULL;
 117 }
 118
 119 static const struct ieee80211_hw_mode *iwl3945_get_hw_mode(
 120                 struct iwl3945_priv *priv, int mode)
 121 {
 122         int i;
 123
 124         for (i = 0; i < 3; i++)
 125                 if (priv->modes[i].mode == mode)
 126                         return &priv->modes[i];
 127
 128         return NULL;
 129 }
 130
 131 static int iwl3945_is_empty_essid(const char *essid, int essid_len)
 132 {
 133         /* Single white space is for Linksys APs */
 134         if (essid_len == 1 && essid[0] == ' ')
 135                 return 1;
 136
 137         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 138         while (essid_len) {
 139                 essid_len--;
 140                 if (essid[essid_len] != '\0')
 141                         return 0;
 142         }
 143
 144         return 1;
 145 }
 146
 147 static const char *iwl3945_escape_essid(const char *essid, u8 essid_len)
 148 {
 149         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 150         const char *s = essid;
 151         char *d = escaped;
 152
 153         if (iwl3945_is_empty_essid(essid, essid_len)) {
 154                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 155                 return escaped;
 156         }
 157
 158         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 159         while (essid_len--) {
 160                 if (*s == '\0') {
 161                         *d++ = '\\';
 162                         *d++ = '0';
 163                         s++;
 164                 } else
 165                         *d++ = *s++;
 166         }
 167         *d = '\0';
 168         return escaped;
 169 }
 170
 171 static void iwl3945_print_hex_dump(int level, void *p, u32 len)
 172 {
 173 #ifdef CONFIG_IWL3945_DEBUG
 174         if (!(iwl3945_debug_level & level))
 175                 return;
 176
 177         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 178                         p, len, 1);
 179 #endif
 180 }
 181
 182 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 183  * DMA services
 184  *
 185  * Theory of operation
 186  *
 187  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 188  * of buffer descriptors, each of which points to one or more data buffers for
 189  * the device to read from or fill.  Driver and device exchange status of each
 190  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 191  * entries in each circular buffer, to protect against confusing empty and full
 192  * queue states.
 193  *
 194  * The device reads or writes the data in the queues via the device's several
 195  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 196  *
 197  * For Tx queue, there are low mark and high mark limits. If, after queuing
 198  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 199  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 200  * Tx queue resumed.
 201  *
 202  * The 3945 operates with six queues:  One receive queue, one transmit queue
 203  * (#4) for sending commands to the device firmware, and four transmit queues
 204  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 205  ***************************************************/
 206
 207 static int iwl3945_queue_space(const struct iwl3945_queue *q)
 208 {
 209         int s = q->read_ptr - q->write_ptr;
 210
 211         if (q->read_ptr > q->write_ptr)
 212                 s -= q->n_bd;
 213
 214         if (s <= 0)
 215                 s += q->n_window;
 216         /* keep some reserve to not confuse empty and full situations */
 217         s -= 2;
 218         if (s < 0)
 219                 s = 0;
 220         return s;
 221 }
 222
 223 /**
 224  * iwl3945_queue_inc_wrap - increment queue index, wrap back to beginning
 225  * @index -- current index
 226  * @n_bd -- total number of entries in queue (must be power of 2)
 227  */
 228 static inline int iwl3945_queue_inc_wrap(int index, int n_bd)
 229 {
 230         return ++index & (n_bd - 1);
 231 }
 232
 233 /**
 234  * iwl3945_queue_dec_wrap - increment queue index, wrap back to end
 235  * @index -- current index
 236  * @n_bd -- total number of entries in queue (must be power of 2)
 237  */
 238 static inline int iwl3945_queue_dec_wrap(int index, int n_bd)
 239 {
 240         return --index & (n_bd - 1);
 241 }
 242
 243 static inline int x2_queue_used(const struct iwl3945_queue *q, int i)
 244 {
 245         return q->write_ptr > q->read_ptr ?
 246                 (i >= q->read_ptr && i < q->write_ptr) :
 247                 !(i < q->read_ptr && i >= q->write_ptr);
 248 }
 249
 250 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 251 {
 252         /* This is for scan command, the big buffer at end of command array */
 253         if (is_huge)
 254                 return q->n_window;     /* must be power of 2 */
 255
 256         /* Otherwise, use normal size buffers */
 257         return index & (q->n_window - 1);
 258 }
 259
 260 /**
 261  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 262  */
 263 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 264                           int count, int slots_num, u32 id)
 265 {
 266         q->n_bd = count;
 267         q->n_window = slots_num;
 268         q->id = id;
 269
 270         /* count must be power-of-two size, otherwise iwl3945_queue_inc_wrap
 271          * and iwl3945_queue_dec_wrap are broken. */
 272         BUG_ON(!is_power_of_2(count));
 273
 274         /* slots_num must be power-of-two size, otherwise
 275          * get_cmd_index is broken. */
 276         BUG_ON(!is_power_of_2(slots_num));
 277
 278         q->low_mark = q->n_window / 4;
 279         if (q->low_mark < 4)
 280                 q->low_mark = 4;
 281
 282         q->high_mark = q->n_window / 8;
 283         if (q->high_mark < 2)
 284                 q->high_mark = 2;
 285
 286         q->write_ptr = q->read_ptr = 0;
 287
 288         return 0;
 289 }
 290
 291 /**
 292  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 293  */
 294 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 295                               struct iwl3945_tx_queue *txq, u32 id)
 296 {
 297         struct pci_dev *dev = priv->pci_dev;
 298
 299         /* Driver private data, only for Tx (not command) queues,
 300          * not shared with device. */
 301         if (id != IWL_CMD_QUEUE_NUM) {
 302                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 303                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 304                 if (!txq->txb) {
 305                         IWL_ERROR("kmalloc for auxiliary BD "
 306                                   "structures failed\n");
 307                         goto error;
 308                 }
 309         } else
 310                 txq->txb = NULL;
 311
 312         /* Circular buffer of transmit frame descriptors (TFDs),
 313          * shared with device */
 314         txq->bd = pci_alloc_consistent(dev,
 315                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 316                         &txq->q.dma_addr);
 317
 318         if (!txq->bd) {
 319                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 320                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 321                 goto error;
 322         }
 323         txq->q.id = id;
 324
 325         return 0;
 326
 327  error:
 328         if (txq->txb) {
 329                 kfree(txq->txb);
 330                 txq->txb = NULL;
 331         }
 332
 333         return -ENOMEM;
 334 }
 335
 336 /**
 337  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 338  */
 339 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 340                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 341 {
 342         struct pci_dev *dev = priv->pci_dev;
 343         int len;
 344         int rc = 0;
 345
 346         /*
 347          * Alloc buffer array for commands (Tx or other types of commands).
 348          * For the command queue (#4), allocate command space + one big
 349          * command for scan, since scan command is very huge; the system will
 350          * not have two scans at the same time, so only one is needed.
 351          * For data Tx queues (all other queues), no super-size command
 352          * space is needed.
 353          */
 354         len = sizeof(struct iwl3945_cmd) * slots_num;
 355         if (txq_id == IWL_CMD_QUEUE_NUM)
 356                 len +=  IWL_MAX_SCAN_SIZE;
 357         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 358         if (!txq->cmd)
 359                 return -ENOMEM;
 360
 361         /* Alloc driver data array and TFD circular buffer */
 362         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 363         if (rc) {
 364                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 365
 366                 return -ENOMEM;
 367         }
 368         txq->need_update = 0;
 369
 370         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 371          * iwl3945_queue_inc_wrap and iwl3945_queue_dec_wrap are broken. */
 372         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 373
 374         /* Initialize queue high/low-water, head/tail indexes */
 375         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 376
 377         /* Tell device where to find queue, enable DMA channel. */
 378         iwl3945_hw_tx_queue_init(priv, txq);
 379
 380         return 0;
 381 }
 382
 383 /**
 384  * iwl3945_tx_queue_free - Deallocate DMA queue.
 385  * @txq: Transmit queue to deallocate.
 386  *
 387  * Empty queue by removing and destroying all BD's.
 388  * Free all buffers.
 389  * 0-fill, but do not free "txq" descriptor structure.
 390  */
 391 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 392 {
 393         struct iwl3945_queue *q = &txq->q;
 394         struct pci_dev *dev = priv->pci_dev;
 395         int len;
 396
 397         if (q->n_bd == 0)
 398                 return;
 399
 400         /* first, empty all BD's */
 401         for (; q->write_ptr != q->read_ptr;
 402              q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd))
 403                 iwl3945_hw_txq_free_tfd(priv, txq);
 404
 405         len = sizeof(struct iwl3945_cmd) * q->n_window;
 406         if (q->id == IWL_CMD_QUEUE_NUM)
 407                 len += IWL_MAX_SCAN_SIZE;
 408
 409         /* De-alloc array of command/tx buffers */
 410         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 411
 412         /* De-alloc circular buffer of TFDs */
 413         if (txq->q.n_bd)
 414                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 415                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 416
 417         /* De-alloc array of per-TFD driver data */
 418         if (txq->txb) {
 419                 kfree(txq->txb);
 420                 txq->txb = NULL;
 421         }
 422
 423         /* 0-fill queue descriptor structure */
 424         memset(txq, 0, sizeof(*txq));
 425 }
 426
 427 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 428
 429 /*************** STATION TABLE MANAGEMENT ****
 430  * mac80211 should be examined to determine if sta_info is duplicating
 431  * the functionality provided here
 432  */
 433
 434 /**************************************************************/
 435 #if 0 /* temporary disable till we add real remove station */
 436 /**
 437  * iwl3945_remove_station - Remove driver's knowledge of station.
 438  *
 439  * NOTE:  This does not remove station from device's station table.
 440  */
 441 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 442 {
 443         int index = IWL_INVALID_STATION;
 444         int i;
 445         unsigned long flags;
 446
 447         spin_lock_irqsave(&priv->sta_lock, flags);
 448
 449         if (is_ap)
 450                 index = IWL_AP_ID;
 451         else if (is_broadcast_ether_addr(addr))
 452                 index = priv->hw_setting.bcast_sta_id;
 453         else
 454                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 455                         if (priv->stations[i].used &&
 456                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 457                                                 addr)) {
 458                                 index = i;
 459                                 break;
 460                         }
 461
 462         if (unlikely(index == IWL_INVALID_STATION))
 463                 goto out;
 464
 465         if (priv->stations[index].used) {
 466                 priv->stations[index].used = 0;
 467                 priv->num_stations--;
 468         }
 469
 470         BUG_ON(priv->num_stations < 0);
 471
 472 out:
 473         spin_unlock_irqrestore(&priv->sta_lock, flags);
 474         return 0;
 475 }
 476 #endif
 477
 478 /**
 479  * iwl3945_clear_stations_table - Clear the driver's station table
 480  *
 481  * NOTE:  This does not clear or otherwise alter the device's station table.
 482  */
 483 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 484 {
 485         unsigned long flags;
 486
 487         spin_lock_irqsave(&priv->sta_lock, flags);
 488
 489         priv->num_stations = 0;
 490         memset(priv->stations, 0, sizeof(priv->stations));
 491
 492         spin_unlock_irqrestore(&priv->sta_lock, flags);
 493 }
 494
 495 /**
 496  * iwl3945_add_station - Add station to station tables in driver and device
 497  */
 498 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 499 {
 500         int i;
 501         int index = IWL_INVALID_STATION;
 502         struct iwl3945_station_entry *station;
 503         unsigned long flags_spin;
 504         DECLARE_MAC_BUF(mac);
 505         u8 rate;
 506
 507         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 508         if (is_ap)
 509                 index = IWL_AP_ID;
 510         else if (is_broadcast_ether_addr(addr))
 511                 index = priv->hw_setting.bcast_sta_id;
 512         else
 513                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 514                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 515                                                 addr)) {
 516                                 index = i;
 517                                 break;
 518                         }
 519
 520                         if (!priv->stations[i].used &&
 521                             index == IWL_INVALID_STATION)
 522                                 index = i;
 523                 }
 524
 525         /* These two conditions has the same outcome but keep them separate
 526           since they have different meaning */
 527         if (unlikely(index == IWL_INVALID_STATION)) {
 528                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 529                 return index;
 530         }
 531
 532         if (priv->stations[index].used &&
 533            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 534                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 535                 return index;
 536         }
 537
 538         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 539         station = &priv->stations[index];
 540         station->used = 1;
 541         priv->num_stations++;
 542
 543         /* Set up the REPLY_ADD_STA command to send to device */
 544         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 545         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 546         station->sta.mode = 0;
 547         station->sta.sta.sta_id = index;
 548         station->sta.station_flags = 0;
 549
 550         if (priv->phymode == MODE_IEEE80211A)
 551                 rate = IWL_RATE_6M_PLCP;
 552         else
 553                 rate =  IWL_RATE_1M_PLCP;
 554
 555         /* Turn on both antennas for the station... */
 556         station->sta.rate_n_flags =
 557                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 558         station->current_rate.rate_n_flags =
 559                         le16_to_cpu(station->sta.rate_n_flags);
 560
 561         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 562
 563         /* Add station to device's station table */
 564         iwl3945_send_add_station(priv, &station->sta, flags);
 565         return index;
 566
 567 }
 568
 569 /*************** DRIVER STATUS FUNCTIONS   *****/
 570
 571 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 572 {
 573         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 574          * set but EXIT_PENDING is not */
 575         return test_bit(STATUS_READY, &priv->status) &&
 576                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 577                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 578 }
 579
 580 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 581 {
 582         return test_bit(STATUS_ALIVE, &priv->status);
 583 }
 584
 585 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 586 {
 587         return test_bit(STATUS_INIT, &priv->status);
 588 }
 589
 590 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 591 {
 592         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 593                test_bit(STATUS_RF_KILL_SW, &priv->status);
 594 }
 595
 596 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 597 {
 598
 599         if (iwl3945_is_rfkill(priv))
 600                 return 0;
 601
 602         return iwl3945_is_ready(priv);
 603 }
 604
 605 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 606
 607 #define IWL_CMD(x) case x : return #x
 608
 609 static const char *get_cmd_string(u8 cmd)
 610 {
 611         switch (cmd) {
 612                 IWL_CMD(REPLY_ALIVE);
 613                 IWL_CMD(REPLY_ERROR);
 614                 IWL_CMD(REPLY_RXON);
 615                 IWL_CMD(REPLY_RXON_ASSOC);
 616                 IWL_CMD(REPLY_QOS_PARAM);
 617                 IWL_CMD(REPLY_RXON_TIMING);
 618                 IWL_CMD(REPLY_ADD_STA);
 619                 IWL_CMD(REPLY_REMOVE_STA);
 620                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 621                 IWL_CMD(REPLY_3945_RX);
 622                 IWL_CMD(REPLY_TX);
 623                 IWL_CMD(REPLY_RATE_SCALE);
 624                 IWL_CMD(REPLY_LEDS_CMD);
 625                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 626                 IWL_CMD(RADAR_NOTIFICATION);
 627                 IWL_CMD(REPLY_QUIET_CMD);
 628                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 629                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 630                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 631                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 632                 IWL_CMD(POWER_TABLE_CMD);
 633                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 634                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 635                 IWL_CMD(REPLY_SCAN_CMD);
 636                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 637                 IWL_CMD(SCAN_START_NOTIFICATION);
 638                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 639                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 640                 IWL_CMD(BEACON_NOTIFICATION);
 641                 IWL_CMD(REPLY_TX_BEACON);
 642                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 643                 IWL_CMD(QUIET_NOTIFICATION);
 644                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 645                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 646                 IWL_CMD(REPLY_BT_CONFIG);
 647                 IWL_CMD(REPLY_STATISTICS_CMD);
 648                 IWL_CMD(STATISTICS_NOTIFICATION);
 649                 IWL_CMD(REPLY_CARD_STATE_CMD);
 650                 IWL_CMD(CARD_STATE_NOTIFICATION);
 651                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 652         default:
 653                 return "UNKNOWN";
 654
 655         }
 656 }
 657
 658 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 659
 660 /**
 661  * iwl3945_enqueue_hcmd - enqueue a uCode command
 662  * @priv: device private data point
 663  * @cmd: a point to the ucode command structure
 664  *
 665  * The function returns < 0 values to indicate the operation is
 666  * failed. On success, it turns the index (> 0) of command in the
 667  * command queue.
 668  */
 669 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 670 {
 671         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 672         struct iwl3945_queue *q = &txq->q;
 673         struct iwl3945_tfd_frame *tfd;
 674         u32 *control_flags;
 675         struct iwl3945_cmd *out_cmd;
 676         u32 idx;
 677         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 678         dma_addr_t phys_addr;
 679         int pad;
 680         u16 count;
 681         int ret;
 682         unsigned long flags;
 683
 684         /* If any of the command structures end up being larger than
 685          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 686          * we will need to increase the size of the TFD entries */
 687         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 688                !(cmd->meta.flags & CMD_SIZE_HUGE));
 689
 690         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 691                 IWL_ERROR("No space for Tx\n");
 692                 return -ENOSPC;
 693         }
 694
 695         spin_lock_irqsave(&priv->hcmd_lock, flags);
 696
 697         tfd = &txq->bd[q->write_ptr];
 698         memset(tfd, 0, sizeof(*tfd));
 699
 700         control_flags = (u32 *) tfd;
 701
 702         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 703         out_cmd = &txq->cmd[idx];
 704
 705         out_cmd->hdr.cmd = cmd->id;
 706         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 707         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 708
 709         /* At this point, the out_cmd now has all of the incoming cmd
 710          * information */
 711
 712         out_cmd->hdr.flags = 0;
 713         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 714                         INDEX_TO_SEQ(q->write_ptr));
 715         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 716                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 717
 718         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 719                         offsetof(struct iwl3945_cmd, hdr);
 720         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 721
 722         pad = U32_PAD(cmd->len);
 723         count = TFD_CTL_COUNT_GET(*control_flags);
 724         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 725
 726         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 727                      "%d bytes at %d[%d]:%d\n",
 728                      get_cmd_string(out_cmd->hdr.cmd),
 729                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 730                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 731
 732         txq->need_update = 1;
 733
 734         /* Increment and update queue's write index */
 735         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
 736         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 737
 738         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 739         return ret ? ret : idx;
 740 }
 741
 742 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 743 {
 744         int ret;
 745
 746         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 747
 748         /* An asynchronous command can not expect an SKB to be set. */
 749         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 750
 751         /* An asynchronous command MUST have a callback. */
 752         BUG_ON(!cmd->meta.u.callback);
 753
 754         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 755                 return -EBUSY;
 756
 757         ret = iwl3945_enqueue_hcmd(priv, cmd);
 758         if (ret < 0) {
 759                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 760                           get_cmd_string(cmd->id), ret);
 761                 return ret;
 762         }
 763         return 0;
 764 }
 765
 766 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 767 {
 768         int cmd_idx;
 769         int ret;
 770         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 771
 772         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 773
 774          /* A synchronous command can not have a callback set. */
 775         BUG_ON(cmd->meta.u.callback != NULL);
 776
 777         if (atomic_xchg(&entry, 1)) {
 778                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 779                           get_cmd_string(cmd->id));
 780                 return -EBUSY;
 781         }
 782
 783         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 784
 785         if (cmd->meta.flags & CMD_WANT_SKB)
 786                 cmd->meta.source = &cmd->meta;
 787
 788         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 789         if (cmd_idx < 0) {
 790                 ret = cmd_idx;
 791                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 792                           get_cmd_string(cmd->id), ret);
 793                 goto out;
 794         }
 795
 796         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 797                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 798                         HOST_COMPLETE_TIMEOUT);
 799         if (!ret) {
 800                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 801                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 802                                   get_cmd_string(cmd->id),
 803                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 804
 805                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 806                         ret = -ETIMEDOUT;
 807                         goto cancel;
 808                 }
 809         }
 810
 811         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 812                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 813                                get_cmd_string(cmd->id));
 814                 ret = -ECANCELED;
 815                 goto fail;
 816         }
 817         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 818                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 819                                get_cmd_string(cmd->id));
 820                 ret = -EIO;
 821                 goto fail;
 822         }
 823         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 824                 IWL_ERROR("Error: Response NULL in '%s'\n",
 825                           get_cmd_string(cmd->id));
 826                 ret = -EIO;
 827                 goto out;
 828         }
 829
 830         ret = 0;
 831         goto out;
 832
 833 cancel:
 834         if (cmd->meta.flags & CMD_WANT_SKB) {
 835                 struct iwl3945_cmd *qcmd;
 836
 837                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 838                  * TX cmd queue. Otherwise in case the cmd comes
 839                  * in later, it will possibly set an invalid
 840                  * address (cmd->meta.source). */
 841                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 842                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 843         }
 844 fail:
 845         if (cmd->meta.u.skb) {
 846                 dev_kfree_skb_any(cmd->meta.u.skb);
 847                 cmd->meta.u.skb = NULL;
 848         }
 849 out:
 850         atomic_set(&entry, 0);
 851         return ret;
 852 }
 853
 854 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 855 {
 856         if (cmd->meta.flags & CMD_ASYNC)
 857                 return iwl3945_send_cmd_async(priv, cmd);
 858
 859         return iwl3945_send_cmd_sync(priv, cmd);
 860 }
 861
 862 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 863 {
 864         struct iwl3945_host_cmd cmd = {
 865                 .id = id,
 866                 .len = len,
 867                 .data = data,
 868         };
 869
 870         return iwl3945_send_cmd_sync(priv, &cmd);
 871 }
 872
 873 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 874 {
 875         struct iwl3945_host_cmd cmd = {
 876                 .id = id,
 877                 .len = sizeof(val),
 878                 .data = &val,
 879         };
 880
 881         return iwl3945_send_cmd_sync(priv, &cmd);
 882 }
 883
 884 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 885 {
 886         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 887 }
 888
 889 /**
 890  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 891  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 892  * @channel: Any channel valid for the requested phymode
 893
 894  * In addition to setting the staging RXON, priv->phymode is also set.
 895  *
 896  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 897  * in the staging RXON flag structure based on the phymode
 898  */
 899 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv, u8 phymode, u16 channel)
 900 {
 901         if (!iwl3945_get_channel_info(priv, phymode, channel)) {
 902                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 903                                channel, phymode);
 904                 return -EINVAL;
 905         }
 906
 907         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 908             (priv->phymode == phymode))
 909                 return 0;
 910
 911         priv->staging_rxon.channel = cpu_to_le16(channel);
 912         if (phymode == MODE_IEEE80211A)
 913                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 914         else
 915                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 916
 917         priv->phymode = phymode;
 918
 919         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 920
 921         return 0;
 922 }
 923
 924 /**
 925  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 926  *
 927  * NOTE:  This is really only useful during development and can eventually
 928  * be #ifdef'd out once the driver is stable and folks aren't actively
 929  * making changes
 930  */
 931 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 932 {
 933         int error = 0;
 934         int counter = 1;
 935
 936         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 937                 error |= le32_to_cpu(rxon->flags &
 938                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 939                                  RXON_FLG_RADAR_DETECT_MSK));
 940                 if (error)
 941                         IWL_WARNING("check 24G fields %d | %d\n",
 942                                     counter++, error);
 943         } else {
 944                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 945                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 946                 if (error)
 947                         IWL_WARNING("check 52 fields %d | %d\n",
 948                                     counter++, error);
 949                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 950                 if (error)
 951                         IWL_WARNING("check 52 CCK %d | %d\n",
 952                                     counter++, error);
 953         }
 954         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 955         if (error)
 956                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 957
 958         /* make sure basic rates 6Mbps and 1Mbps are supported */
 959         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 960                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 961         if (error)
 962                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 963
 964         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 965         if (error)
 966                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 967
 968         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 969                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 970         if (error)
 971                 IWL_WARNING("check CCK and short slot %d | %d\n",
 972                             counter++, error);
 973
 974         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 975                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 976         if (error)
 977                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 978                             counter++, error);
 979
 980         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 981                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 982         if (error)
 983                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 984                             counter++, error);
 985
 986         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 987                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 988                                 RXON_FLG_ANT_A_MSK)) == 0);
 989         if (error)
 990                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 991
 992         if (error)
 993                 IWL_WARNING("Tuning to channel %d\n",
 994                             le16_to_cpu(rxon->channel));
 995
 996         if (error) {
 997                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 998                 return -1;
 999         }
1000         return 0;
1001 }
1002
1003 /**
1004  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1005  * @priv: staging_rxon is compared to active_rxon
1006  *
1007  * If the RXON structure is changing enough to require a new tune,
1008  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1009  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1010  */
1011 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
1012 {
1013
1014         /* These items are only settable from the full RXON command */
1015         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1016             compare_ether_addr(priv->staging_rxon.bssid_addr,
1017                                priv->active_rxon.bssid_addr) ||
1018             compare_ether_addr(priv->staging_rxon.node_addr,
1019                                priv->active_rxon.node_addr) ||
1020             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1021                                priv->active_rxon.wlap_bssid_addr) ||
1022             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1023             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1024             (priv->staging_rxon.air_propagation !=
1025              priv->active_rxon.air_propagation) ||
1026             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1027                 return 1;
1028
1029         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1030          * be updated with the RXON_ASSOC command -- however only some
1031          * flag transitions are allowed using RXON_ASSOC */
1032
1033         /* Check if we are not switching bands */
1034         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1035             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1036                 return 1;
1037
1038         /* Check if we are switching association toggle */
1039         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1040                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1041                 return 1;
1042
1043         return 0;
1044 }
1045
1046 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
1047 {
1048         int rc = 0;
1049         struct iwl3945_rx_packet *res = NULL;
1050         struct iwl3945_rxon_assoc_cmd rxon_assoc;
1051         struct iwl3945_host_cmd cmd = {
1052                 .id = REPLY_RXON_ASSOC,
1053                 .len = sizeof(rxon_assoc),
1054                 .meta.flags = CMD_WANT_SKB,
1055                 .data = &rxon_assoc,
1056         };
1057         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
1058         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
1059
1060         if ((rxon1->flags == rxon2->flags) &&
1061             (rxon1->filter_flags == rxon2->filter_flags) &&
1062             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1063             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1064                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1065                 return 0;
1066         }
1067
1068         rxon_assoc.flags = priv->staging_rxon.flags;
1069         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1070         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1071         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1072         rxon_assoc.reserved = 0;
1073
1074         rc = iwl3945_send_cmd_sync(priv, &cmd);
1075         if (rc)
1076                 return rc;
1077
1078         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1079         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1080                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1081                 rc = -EIO;
1082         }
1083
1084         priv->alloc_rxb_skb--;
1085         dev_kfree_skb_any(cmd.meta.u.skb);
1086
1087         return rc;
1088 }
1089
1090 /**
1091  * iwl3945_commit_rxon - commit staging_rxon to hardware
1092  *
1093  * The RXON command in staging_rxon is committed to the hardware and
1094  * the active_rxon structure is updated with the new data.  This
1095  * function correctly transitions out of the RXON_ASSOC_MSK state if
1096  * a HW tune is required based on the RXON structure changes.
1097  */
1098 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1099 {
1100         /* cast away the const for active_rxon in this function */
1101         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1102         int rc = 0;
1103         DECLARE_MAC_BUF(mac);
1104
1105         if (!iwl3945_is_alive(priv))
1106                 return -1;
1107
1108         /* always get timestamp with Rx frame */
1109         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1110
1111         /* select antenna */
1112         priv->staging_rxon.flags &=
1113             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1114         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1115
1116         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1117         if (rc) {
1118                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1119                 return -EINVAL;
1120         }
1121
1122         /* If we don't need to send a full RXON, we can use
1123          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1124          * and other flags for the current radio configuration. */
1125         if (!iwl3945_full_rxon_required(priv)) {
1126                 rc = iwl3945_send_rxon_assoc(priv);
1127                 if (rc) {
1128                         IWL_ERROR("Error setting RXON_ASSOC "
1129                                   "configuration (%d).\n", rc);
1130                         return rc;
1131                 }
1132
1133                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1134
1135                 return 0;
1136         }
1137
1138         /* If we are currently associated and the new config requires
1139          * an RXON_ASSOC and the new config wants the associated mask enabled,
1140          * we must clear the associated from the active configuration
1141          * before we apply the new config */
1142         if (iwl3945_is_associated(priv) &&
1143             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1144                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1145                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1146
1147                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1148                                       sizeof(struct iwl3945_rxon_cmd),
1149                                       &priv->active_rxon);
1150
1151                 /* If the mask clearing failed then we set
1152                  * active_rxon back to what it was previously */
1153                 if (rc) {
1154                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1155                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1156                                   "configuration (%d).\n", rc);
1157                         return rc;
1158                 }
1159         }
1160
1161         IWL_DEBUG_INFO("Sending RXON\n"
1162                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1163                        "* channel = %d\n"
1164                        "* bssid = %s\n",
1165                        ((priv->staging_rxon.filter_flags &
1166                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1167                        le16_to_cpu(priv->staging_rxon.channel),
1168                        print_mac(mac, priv->staging_rxon.bssid_addr));
1169
1170         /* Apply the new configuration */
1171         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1172                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1173         if (rc) {
1174                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1175                 return rc;
1176         }
1177
1178         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1179
1180         iwl3945_clear_stations_table(priv);
1181
1182         /* If we issue a new RXON command which required a tune then we must
1183          * send a new TXPOWER command or we won't be able to Tx any frames */
1184         rc = iwl3945_hw_reg_send_txpower(priv);
1185         if (rc) {
1186                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1187                 return rc;
1188         }
1189
1190         /* Add the broadcast address so we can send broadcast frames */
1191         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1192             IWL_INVALID_STATION) {
1193                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1194                 return -EIO;
1195         }
1196
1197         /* If we have set the ASSOC_MSK and we are in BSS mode then
1198          * add the IWL_AP_ID to the station rate table */
1199         if (iwl3945_is_associated(priv) &&
1200             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1201                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1202                     == IWL_INVALID_STATION) {
1203                         IWL_ERROR("Error adding AP address for transmit.\n");
1204                         return -EIO;
1205                 }
1206
1207         /* Init the hardware's rate fallback order based on the
1208          * phymode */
1209         rc = iwl3945_init_hw_rate_table(priv);
1210         if (rc) {
1211                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1212                 return -EIO;
1213         }
1214
1215         return 0;
1216 }
1217
1218 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1219 {
1220         struct iwl3945_bt_cmd bt_cmd = {
1221                 .flags = 3,
1222                 .lead_time = 0xAA,
1223                 .max_kill = 1,
1224                 .kill_ack_mask = 0,
1225                 .kill_cts_mask = 0,
1226         };
1227
1228         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1229                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1230 }
1231
1232 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1233 {
1234         int rc = 0;
1235         struct iwl3945_rx_packet *res;
1236         struct iwl3945_host_cmd cmd = {
1237                 .id = REPLY_SCAN_ABORT_CMD,
1238                 .meta.flags = CMD_WANT_SKB,
1239         };
1240
1241         /* If there isn't a scan actively going on in the hardware
1242          * then we are in between scan bands and not actually
1243          * actively scanning, so don't send the abort command */
1244         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1245                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1246                 return 0;
1247         }
1248
1249         rc = iwl3945_send_cmd_sync(priv, &cmd);
1250         if (rc) {
1251                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1252                 return rc;
1253         }
1254
1255         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1256         if (res->u.status != CAN_ABORT_STATUS) {
1257                 /* The scan abort will return 1 for success or
1258                  * 2 for "failure".  A failure condition can be
1259                  * due to simply not being in an active scan which
1260                  * can occur if we send the scan abort before we
1261                  * the microcode has notified us that a scan is
1262                  * completed. */
1263                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1264                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1265                 clear_bit(STATUS_SCAN_HW, &priv->status);
1266         }
1267
1268         dev_kfree_skb_any(cmd.meta.u.skb);
1269
1270         return rc;
1271 }
1272
1273 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1274                                         struct iwl3945_cmd *cmd,
1275                                         struct sk_buff *skb)
1276 {
1277         return 1;
1278 }
1279
1280 /*
1281  * CARD_STATE_CMD
1282  *
1283  * Use: Sets the device's internal card state to enable, disable, or halt
1284  *
1285  * When in the 'enable' state the card operates as normal.
1286  * When in the 'disable' state, the card enters into a low power mode.
1287  * When in the 'halt' state, the card is shut down and must be fully
1288  * restarted to come back on.
1289  */
1290 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1291 {
1292         struct iwl3945_host_cmd cmd = {
1293                 .id = REPLY_CARD_STATE_CMD,
1294                 .len = sizeof(u32),
1295                 .data = &flags,
1296                 .meta.flags = meta_flag,
1297         };
1298
1299         if (meta_flag & CMD_ASYNC)
1300                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1301
1302         return iwl3945_send_cmd(priv, &cmd);
1303 }
1304
1305 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1306                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1307 {
1308         struct iwl3945_rx_packet *res = NULL;
1309
1310         if (!skb) {
1311                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1312                 return 1;
1313         }
1314
1315         res = (struct iwl3945_rx_packet *)skb->data;
1316         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1317                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1318                           res->hdr.flags);
1319                 return 1;
1320         }
1321
1322         switch (res->u.add_sta.status) {
1323         case ADD_STA_SUCCESS_MSK:
1324                 break;
1325         default:
1326                 break;
1327         }
1328
1329         /* We didn't cache the SKB; let the caller free it */
1330         return 1;
1331 }
1332
1333 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1334                          struct iwl3945_addsta_cmd *sta, u8 flags)
1335 {
1336         struct iwl3945_rx_packet *res = NULL;
1337         int rc = 0;
1338         struct iwl3945_host_cmd cmd = {
1339                 .id = REPLY_ADD_STA,
1340                 .len = sizeof(struct iwl3945_addsta_cmd),
1341                 .meta.flags = flags,
1342                 .data = sta,
1343         };
1344
1345         if (flags & CMD_ASYNC)
1346                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1347         else
1348                 cmd.meta.flags |= CMD_WANT_SKB;
1349
1350         rc = iwl3945_send_cmd(priv, &cmd);
1351
1352         if (rc || (flags & CMD_ASYNC))
1353                 return rc;
1354
1355         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1356         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1357                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1358                           res->hdr.flags);
1359                 rc = -EIO;
1360         }
1361
1362         if (rc == 0) {
1363                 switch (res->u.add_sta.status) {
1364                 case ADD_STA_SUCCESS_MSK:
1365                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1366                         break;
1367                 default:
1368                         rc = -EIO;
1369                         IWL_WARNING("REPLY_ADD_STA failed\n");
1370                         break;
1371                 }
1372         }
1373
1374         priv->alloc_rxb_skb--;
1375         dev_kfree_skb_any(cmd.meta.u.skb);
1376
1377         return rc;
1378 }
1379
1380 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1381                                    struct ieee80211_key_conf *keyconf,
1382                                    u8 sta_id)
1383 {
1384         unsigned long flags;
1385         __le16 key_flags = 0;
1386
1387         switch (keyconf->alg) {
1388         case ALG_CCMP:
1389                 key_flags |= STA_KEY_FLG_CCMP;
1390                 key_flags |= cpu_to_le16(
1391                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1392                 key_flags &= ~STA_KEY_FLG_INVALID;
1393                 break;
1394         case ALG_TKIP:
1395         case ALG_WEP:
1396         default:
1397                 return -EINVAL;
1398         }
1399         spin_lock_irqsave(&priv->sta_lock, flags);
1400         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1401         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1402         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1403                keyconf->keylen);
1404
1405         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1406                keyconf->keylen);
1407         priv->stations[sta_id].sta.key.key_flags = key_flags;
1408         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1409         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1410
1411         spin_unlock_irqrestore(&priv->sta_lock, flags);
1412
1413         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1414         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1415         return 0;
1416 }
1417
1418 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1419 {
1420         unsigned long flags;
1421
1422         spin_lock_irqsave(&priv->sta_lock, flags);
1423         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1424         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1425         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1426         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1427         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1428         spin_unlock_irqrestore(&priv->sta_lock, flags);
1429
1430         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1431         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1432         return 0;
1433 }
1434
1435 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1436 {
1437         struct list_head *element;
1438
1439         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1440                        priv->frames_count);
1441
1442         while (!list_empty(&priv->free_frames)) {
1443                 element = priv->free_frames.next;
1444                 list_del(element);
1445                 kfree(list_entry(element, struct iwl3945_frame, list));
1446                 priv->frames_count--;
1447         }
1448
1449         if (priv->frames_count) {
1450                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1451                             priv->frames_count);
1452                 priv->frames_count = 0;
1453         }
1454 }
1455
1456 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1457 {
1458         struct iwl3945_frame *frame;
1459         struct list_head *element;
1460         if (list_empty(&priv->free_frames)) {
1461                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1462                 if (!frame) {
1463                         IWL_ERROR("Could not allocate frame!\n");
1464                         return NULL;
1465                 }
1466
1467                 priv->frames_count++;
1468                 return frame;
1469         }
1470
1471         element = priv->free_frames.next;
1472         list_del(element);
1473         return list_entry(element, struct iwl3945_frame, list);
1474 }
1475
1476 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1477 {
1478         memset(frame, 0, sizeof(*frame));
1479         list_add(&frame->list, &priv->free_frames);
1480 }
1481
1482 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1483                                 struct ieee80211_hdr *hdr,
1484                                 const u8 *dest, int left)
1485 {
1486
1487         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1488             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1489              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1490                 return 0;
1491
1492         if (priv->ibss_beacon->len > left)
1493                 return 0;
1494
1495         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1496
1497         return priv->ibss_beacon->len;
1498 }
1499
1500 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1501 {
1502         u8 i;
1503
1504         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1505              i = iwl3945_rates[i].next_ieee) {
1506                 if (rate_mask & (1 << i))
1507                         return iwl3945_rates[i].plcp;
1508         }
1509
1510         return IWL_RATE_INVALID;
1511 }
1512
1513 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1514 {
1515         struct iwl3945_frame *frame;
1516         unsigned int frame_size;
1517         int rc;
1518         u8 rate;
1519
1520         frame = iwl3945_get_free_frame(priv);
1521
1522         if (!frame) {
1523                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1524                           "command.\n");
1525                 return -ENOMEM;
1526         }
1527
1528         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1529                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1530                                                 0xFF0);
1531                 if (rate == IWL_INVALID_RATE)
1532                         rate = IWL_RATE_6M_PLCP;
1533         } else {
1534                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1535                 if (rate == IWL_INVALID_RATE)
1536                         rate = IWL_RATE_1M_PLCP;
1537         }
1538
1539         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1540
1541         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1542                               &frame->u.cmd[0]);
1543
1544         iwl3945_free_frame(priv, frame);
1545
1546         return rc;
1547 }
1548
1549 /******************************************************************************
1550  *
1551  * EEPROM related functions
1552  *
1553  ******************************************************************************/
1554
1555 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1556 {
1557         memcpy(mac, priv->eeprom.mac_address, 6);
1558 }
1559
1560 /*
1561  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1562  * embedded controller) as EEPROM reader; each read is a series of pulses
1563  * to/from the EEPROM chip, not a single event, so even reads could conflict
1564  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1565  * simply claims ownership, which should be safe when this function is called
1566  * (i.e. before loading uCode!).
1567  */
1568 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1569 {
1570         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1571         return 0;
1572 }
1573
1574 /**
1575  * iwl3945_eeprom_init - read EEPROM contents
1576  *
1577  * Load the EEPROM contents from adapter into priv->eeprom
1578  *
1579  * NOTE:  This routine uses the non-debug IO access functions.
1580  */
1581 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1582 {
1583         __le16 *e = (__le16 *)&priv->eeprom;
1584         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1585         u32 r;
1586         int sz = sizeof(priv->eeprom);
1587         int rc;
1588         int i;
1589         u16 addr;
1590
1591         /* The EEPROM structure has several padding buffers within it
1592          * and when adding new EEPROM maps is subject to programmer errors
1593          * which may be very difficult to identify without explicitly
1594          * checking the resulting size of the eeprom map. */
1595         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1596
1597         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1598                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1599                 return -ENOENT;
1600         }
1601
1602         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1603         rc = iwl3945_eeprom_acquire_semaphore(priv);
1604         if (rc < 0) {
1605                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1606                 return -ENOENT;
1607         }
1608
1609         /* eeprom is an array of 16bit values */
1610         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1611                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1612                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1613
1614                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1615                                         i += IWL_EEPROM_ACCESS_DELAY) {
1616                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1617                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1618                                 break;
1619                         udelay(IWL_EEPROM_ACCESS_DELAY);
1620                 }
1621
1622                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1623                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1624                         return -ETIMEDOUT;
1625                 }
1626                 e[addr / 2] = cpu_to_le16(r >> 16);
1627         }
1628
1629         return 0;
1630 }
1631
1632 /******************************************************************************
1633  *
1634  * Misc. internal state and helper functions
1635  *
1636  ******************************************************************************/
1637 #ifdef CONFIG_IWL3945_DEBUG
1638
1639 /**
1640  * iwl3945_report_frame - dump frame to syslog during debug sessions
1641  *
1642  * You may hack this function to show different aspects of received frames,
1643  * including selective frame dumps.
1644  * group100 parameter selects whether to show 1 out of 100 good frames.
1645  */
1646 void iwl3945_report_frame(struct iwl3945_priv *priv,
1647                       struct iwl3945_rx_packet *pkt,
1648                       struct ieee80211_hdr *header, int group100)
1649 {
1650         u32 to_us;
1651         u32 print_summary = 0;
1652         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1653         u32 hundred = 0;
1654         u32 dataframe = 0;
1655         u16 fc;
1656         u16 seq_ctl;
1657         u16 channel;
1658         u16 phy_flags;
1659         int rate_sym;
1660         u16 length;
1661         u16 status;
1662         u16 bcn_tmr;
1663         u32 tsf_low;
1664         u64 tsf;
1665         u8 rssi;
1666         u8 agc;
1667         u16 sig_avg;
1668         u16 noise_diff;
1669         struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1670         struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1671         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
1672         u8 *data = IWL_RX_DATA(pkt);
1673
1674         /* MAC header */
1675         fc = le16_to_cpu(header->frame_control);
1676         seq_ctl = le16_to_cpu(header->seq_ctrl);
1677
1678         /* metadata */
1679         channel = le16_to_cpu(rx_hdr->channel);
1680         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1681         rate_sym = rx_hdr->rate;
1682         length = le16_to_cpu(rx_hdr->len);
1683
1684         /* end-of-frame status and timestamp */
1685         status = le32_to_cpu(rx_end->status);
1686         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1687         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1688         tsf = le64_to_cpu(rx_end->timestamp);
1689
1690         /* signal statistics */
1691         rssi = rx_stats->rssi;
1692         agc = rx_stats->agc;
1693         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1694         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1695
1696         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1697
1698         /* if data frame is to us and all is good,
1699          *   (optionally) print summary for only 1 out of every 100 */
1700         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1701             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1702                 dataframe = 1;
1703                 if (!group100)
1704                         print_summary = 1;      /* print each frame */
1705                 else if (priv->framecnt_to_us < 100) {
1706                         priv->framecnt_to_us++;
1707                         print_summary = 0;
1708                 } else {
1709                         priv->framecnt_to_us = 0;
1710                         print_summary = 1;
1711                         hundred = 1;
1712                 }
1713         } else {
1714                 /* print summary for all other frames */
1715                 print_summary = 1;
1716         }
1717
1718         if (print_summary) {
1719                 char *title;
1720                 u32 rate;
1721
1722                 if (hundred)
1723                         title = "100Frames";
1724                 else if (fc & IEEE80211_FCTL_RETRY)
1725                         title = "Retry";
1726                 else if (ieee80211_is_assoc_response(fc))
1727                         title = "AscRsp";
1728                 else if (ieee80211_is_reassoc_response(fc))
1729                         title = "RasRsp";
1730                 else if (ieee80211_is_probe_response(fc)) {
1731                         title = "PrbRsp";
1732                         print_dump = 1; /* dump frame contents */
1733                 } else if (ieee80211_is_beacon(fc)) {
1734                         title = "Beacon";
1735                         print_dump = 1; /* dump frame contents */
1736                 } else if (ieee80211_is_atim(fc))
1737                         title = "ATIM";
1738                 else if (ieee80211_is_auth(fc))
1739                         title = "Auth";
1740                 else if (ieee80211_is_deauth(fc))
1741                         title = "DeAuth";
1742                 else if (ieee80211_is_disassoc(fc))
1743                         title = "DisAssoc";
1744                 else
1745                         title = "Frame";
1746
1747                 rate = iwl3945_rate_index_from_plcp(rate_sym);
1748                 if (rate == -1)
1749                         rate = 0;
1750                 else
1751                         rate = iwl3945_rates[rate].ieee / 2;
1752
1753                 /* print frame summary.
1754                  * MAC addresses show just the last byte (for brevity),
1755                  *    but you can hack it to show more, if you'd like to. */
1756                 if (dataframe)
1757                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1758                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1759                                      title, fc, header->addr1[5],
1760                                      length, rssi, channel, rate);
1761                 else {
1762                         /* src/dst addresses assume managed mode */
1763                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1764                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1765                                      "phy=0x%02x, chnl=%d\n",
1766                                      title, fc, header->addr1[5],
1767                                      header->addr3[5], rssi,
1768                                      tsf_low - priv->scan_start_tsf,
1769                                      phy_flags, channel);
1770                 }
1771         }
1772         if (print_dump)
1773                 iwl3945_print_hex_dump(IWL_DL_RX, data, length);
1774 }
1775 #endif
1776
1777 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1778 {
1779         if (priv->hw_setting.shared_virt)
1780                 pci_free_consistent(priv->pci_dev,
1781                                     sizeof(struct iwl3945_shared),
1782                                     priv->hw_setting.shared_virt,
1783                                     priv->hw_setting.shared_phys);
1784 }
1785
1786 /**
1787  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1788  *
1789  * return : set the bit for each supported rate insert in ie
1790  */
1791 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1792                                     u16 basic_rate, int *left)
1793 {
1794         u16 ret_rates = 0, bit;
1795         int i;
1796         u8 *cnt = ie;
1797         u8 *rates = ie + 1;
1798
1799         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1800                 if (bit & supported_rate) {
1801                         ret_rates |= bit;
1802                         rates[*cnt] = iwl3945_rates[i].ieee |
1803                                 ((bit & basic_rate) ? 0x80 : 0x00);
1804                         (*cnt)++;
1805                         (*left)--;
1806                         if ((*left <= 0) ||
1807                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1808                                 break;
1809                 }
1810         }
1811
1812         return ret_rates;
1813 }
1814
1815 /**
1816  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1817  */
1818 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1819                               struct ieee80211_mgmt *frame,
1820                               int left, int is_direct)
1821 {
1822         int len = 0;
1823         u8 *pos = NULL;
1824         u16 active_rates, ret_rates, cck_rates;
1825
1826         /* Make sure there is enough space for the probe request,
1827          * two mandatory IEs and the data */
1828         left -= 24;
1829         if (left < 0)
1830                 return 0;
1831         len += 24;
1832
1833         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1834         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1835         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1836         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1837         frame->seq_ctrl = 0;
1838
1839         /* fill in our indirect SSID IE */
1840         /* ...next IE... */
1841
1842         left -= 2;
1843         if (left < 0)
1844                 return 0;
1845         len += 2;
1846         pos = &(frame->u.probe_req.variable[0]);
1847         *pos++ = WLAN_EID_SSID;
1848         *pos++ = 0;
1849
1850         /* fill in our direct SSID IE... */
1851         if (is_direct) {
1852                 /* ...next IE... */
1853                 left -= 2 + priv->essid_len;
1854                 if (left < 0)
1855                         return 0;
1856                 /* ... fill it in... */
1857                 *pos++ = WLAN_EID_SSID;
1858                 *pos++ = priv->essid_len;
1859                 memcpy(pos, priv->essid, priv->essid_len);
1860                 pos += priv->essid_len;
1861                 len += 2 + priv->essid_len;
1862         }
1863
1864         /* fill in supported rate */
1865         /* ...next IE... */
1866         left -= 2;
1867         if (left < 0)
1868                 return 0;
1869
1870         /* ... fill it in... */
1871         *pos++ = WLAN_EID_SUPP_RATES;
1872         *pos = 0;
1873
1874         priv->active_rate = priv->rates_mask;
1875         active_rates = priv->active_rate;
1876         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1877
1878         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1879         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1880                         priv->active_rate_basic, &left);
1881         active_rates &= ~ret_rates;
1882
1883         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1884                                  priv->active_rate_basic, &left);
1885         active_rates &= ~ret_rates;
1886
1887         len += 2 + *pos;
1888         pos += (*pos) + 1;
1889         if (active_rates == 0)
1890                 goto fill_end;
1891
1892         /* fill in supported extended rate */
1893         /* ...next IE... */
1894         left -= 2;
1895         if (left < 0)
1896                 return 0;
1897         /* ... fill it in... */
1898         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1899         *pos = 0;
1900         iwl3945_supported_rate_to_ie(pos, active_rates,
1901                                  priv->active_rate_basic, &left);
1902         if (*pos > 0)
1903                 len += 2 + *pos;
1904
1905  fill_end:
1906         return (u16)len;
1907 }
1908
1909 /*
1910  * QoS  support
1911 */
1912 #ifdef CONFIG_IWL3945_QOS
1913 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1914                                        struct iwl3945_qosparam_cmd *qos)
1915 {
1916
1917         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1918                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1919 }
1920
1921 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1922 {
1923         u16 cw_min = 15;
1924         u16 cw_max = 1023;
1925         u8 aifs = 2;
1926         u8 is_legacy = 0;
1927         unsigned long flags;
1928         int i;
1929
1930         spin_lock_irqsave(&priv->lock, flags);
1931         priv->qos_data.qos_active = 0;
1932
1933         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1934                 if (priv->qos_data.qos_enable)
1935                         priv->qos_data.qos_active = 1;
1936                 if (!(priv->active_rate & 0xfff0)) {
1937                         cw_min = 31;
1938                         is_legacy = 1;
1939                 }
1940         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1941                 if (priv->qos_data.qos_enable)
1942                         priv->qos_data.qos_active = 1;
1943         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1944                 cw_min = 31;
1945                 is_legacy = 1;
1946         }
1947
1948         if (priv->qos_data.qos_active)
1949                 aifs = 3;
1950
1951         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1952         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1953         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1954         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1955         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1956
1957         if (priv->qos_data.qos_active) {
1958                 i = 1;
1959                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1960                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1961                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1962                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1963                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1964
1965                 i = 2;
1966                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1967                         cpu_to_le16((cw_min + 1) / 2 - 1);
1968                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1969                         cpu_to_le16(cw_max);
1970                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1971                 if (is_legacy)
1972                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1973                                 cpu_to_le16(6016);
1974                 else
1975                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1976                                 cpu_to_le16(3008);
1977                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1978
1979                 i = 3;
1980                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1981                         cpu_to_le16((cw_min + 1) / 4 - 1);
1982                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1983                         cpu_to_le16((cw_max + 1) / 2 - 1);
1984                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1985                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1986                 if (is_legacy)
1987                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1988                                 cpu_to_le16(3264);
1989                 else
1990                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1991                                 cpu_to_le16(1504);
1992         } else {
1993                 for (i = 1; i < 4; i++) {
1994                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1995                                 cpu_to_le16(cw_min);
1996                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1997                                 cpu_to_le16(cw_max);
1998                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1999                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2000                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2001                 }
2002         }
2003         IWL_DEBUG_QOS("set QoS to default \n");
2004
2005         spin_unlock_irqrestore(&priv->lock, flags);
2006 }
2007
2008 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
2009 {
2010         unsigned long flags;
2011
2012         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2013                 return;
2014
2015         if (!priv->qos_data.qos_enable)
2016                 return;
2017
2018         spin_lock_irqsave(&priv->lock, flags);
2019         priv->qos_data.def_qos_parm.qos_flags = 0;
2020
2021         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2022             !priv->qos_data.qos_cap.q_AP.txop_request)
2023                 priv->qos_data.def_qos_parm.qos_flags |=
2024                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2025
2026         if (priv->qos_data.qos_active)
2027                 priv->qos_data.def_qos_parm.qos_flags |=
2028                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2029
2030         spin_unlock_irqrestore(&priv->lock, flags);
2031
2032         if (force || iwl3945_is_associated(priv)) {
2033                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2034                               priv->qos_data.qos_active);
2035
2036                 iwl3945_send_qos_params_command(priv,
2037                                 &(priv->qos_data.def_qos_parm));
2038         }
2039 }
2040
2041 #endif /* CONFIG_IWL3945_QOS */
2042 /*
2043  * Power management (not Tx power!) functions
2044  */
2045 #define MSEC_TO_USEC 1024
2046
2047 #define NOSLP __constant_cpu_to_le32(0)
2048 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2049 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2050 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2051                                      __constant_cpu_to_le32(X1), \
2052                                      __constant_cpu_to_le32(X2), \
2053                                      __constant_cpu_to_le32(X3), \
2054                                      __constant_cpu_to_le32(X4)}
2055
2056
2057 /* default power management (not Tx power) table values */
2058 /* for tim  0-10 */
2059 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
2060         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2061         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2062         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2063         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2064         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2065         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2066 };
2067
2068 /* for tim > 10 */
2069 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
2070         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2071         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2072                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2073         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2074                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2075         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2076                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2077         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2078         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2079                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2080 };
2081
2082 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
2083 {
2084         int rc = 0, i;
2085         struct iwl3945_power_mgr *pow_data;
2086         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
2087         u16 pci_pm;
2088
2089         IWL_DEBUG_POWER("Initialize power \n");
2090
2091         pow_data = &(priv->power_data);
2092
2093         memset(pow_data, 0, sizeof(*pow_data));
2094
2095         pow_data->active_index = IWL_POWER_RANGE_0;
2096         pow_data->dtim_val = 0xffff;
2097
2098         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2099         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2100
2101         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2102         if (rc != 0)
2103                 return 0;
2104         else {
2105                 struct iwl3945_powertable_cmd *cmd;
2106
2107                 IWL_DEBUG_POWER("adjust power command flags\n");
2108
2109                 for (i = 0; i < IWL_POWER_AC; i++) {
2110                         cmd = &pow_data->pwr_range_0[i].cmd;
2111
2112                         if (pci_pm & 0x1)
2113                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2114                         else
2115                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2116                 }
2117         }
2118         return rc;
2119 }
2120
2121 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
2122                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
2123 {
2124         int rc = 0, i;
2125         u8 skip;
2126         u32 max_sleep = 0;
2127         struct iwl3945_power_vec_entry *range;
2128         u8 period = 0;
2129         struct iwl3945_power_mgr *pow_data;
2130
2131         if (mode > IWL_POWER_INDEX_5) {
2132                 IWL_DEBUG_POWER("Error invalid power mode \n");
2133                 return -1;
2134         }
2135         pow_data = &(priv->power_data);
2136
2137         if (pow_data->active_index == IWL_POWER_RANGE_0)
2138                 range = &pow_data->pwr_range_0[0];
2139         else
2140                 range = &pow_data->pwr_range_1[1];
2141
2142         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
2143
2144 #ifdef IWL_MAC80211_DISABLE
2145         if (priv->assoc_network != NULL) {
2146                 unsigned long flags;
2147
2148                 period = priv->assoc_network->tim.tim_period;
2149         }
2150 #endif  /*IWL_MAC80211_DISABLE */
2151         skip = range[mode].no_dtim;
2152
2153         if (period == 0) {
2154                 period = 1;
2155                 skip = 0;
2156         }
2157
2158         if (skip == 0) {
2159                 max_sleep = period;
2160                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2161         } else {
2162                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2163                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2164                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2165         }
2166
2167         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2168                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2169                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2170         }
2171
2172         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2173         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2174         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2175         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2176                         le32_to_cpu(cmd->sleep_interval[0]),
2177                         le32_to_cpu(cmd->sleep_interval[1]),
2178                         le32_to_cpu(cmd->sleep_interval[2]),
2179                         le32_to_cpu(cmd->sleep_interval[3]),
2180                         le32_to_cpu(cmd->sleep_interval[4]));
2181
2182         return rc;
2183 }
2184
2185 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
2186 {
2187         u32 uninitialized_var(final_mode);
2188         int rc;
2189         struct iwl3945_powertable_cmd cmd;
2190
2191         /* If on battery, set to 3,
2192          * if plugged into AC power, set to CAM ("continuously aware mode"),
2193          * else user level */
2194         switch (mode) {
2195         case IWL_POWER_BATTERY:
2196                 final_mode = IWL_POWER_INDEX_3;
2197                 break;
2198         case IWL_POWER_AC:
2199                 final_mode = IWL_POWER_MODE_CAM;
2200                 break;
2201         default:
2202                 final_mode = mode;
2203                 break;
2204         }
2205
2206         iwl3945_update_power_cmd(priv, &cmd, final_mode);
2207
2208         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2209
2210         if (final_mode == IWL_POWER_MODE_CAM)
2211                 clear_bit(STATUS_POWER_PMI, &priv->status);
2212         else
2213                 set_bit(STATUS_POWER_PMI, &priv->status);
2214
2215         return rc;
2216 }
2217
2218 int iwl3945_is_network_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
2219 {
2220         /* Filter incoming packets to determine if they are targeted toward
2221          * this network, discarding packets coming from ourselves */
2222         switch (priv->iw_mode) {
2223         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2224                 /* packets from our adapter are dropped (echo) */
2225                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2226                         return 0;
2227                 /* {broad,multi}cast packets to our IBSS go through */
2228                 if (is_multicast_ether_addr(header->addr1))
2229                         return !compare_ether_addr(header->addr3, priv->bssid);
2230                 /* packets to our adapter go through */
2231                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2232         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2233                 /* packets from our adapter are dropped (echo) */
2234                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2235                         return 0;
2236                 /* {broad,multi}cast packets to our BSS go through */
2237                 if (is_multicast_ether_addr(header->addr1))
2238                         return !compare_ether_addr(header->addr2, priv->bssid);
2239                 /* packets to our adapter go through */
2240                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2241         }
2242
2243         return 1;
2244 }
2245
2246 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2247
2248 static const char *iwl3945_get_tx_fail_reason(u32 status)
2249 {
2250         switch (status & TX_STATUS_MSK) {
2251         case TX_STATUS_SUCCESS:
2252                 return "SUCCESS";
2253                 TX_STATUS_ENTRY(SHORT_LIMIT);
2254                 TX_STATUS_ENTRY(LONG_LIMIT);
2255                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2256                 TX_STATUS_ENTRY(MGMNT_ABORT);
2257                 TX_STATUS_ENTRY(NEXT_FRAG);
2258                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2259                 TX_STATUS_ENTRY(DEST_PS);
2260                 TX_STATUS_ENTRY(ABORTED);
2261                 TX_STATUS_ENTRY(BT_RETRY);
2262                 TX_STATUS_ENTRY(STA_INVALID);
2263                 TX_STATUS_ENTRY(FRAG_DROPPED);
2264                 TX_STATUS_ENTRY(TID_DISABLE);
2265                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2266                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2267                 TX_STATUS_ENTRY(TX_LOCKED);
2268                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2269         }
2270
2271         return "UNKNOWN";
2272 }
2273
2274 /**
2275  * iwl3945_scan_cancel - Cancel any currently executing HW scan
2276  *
2277  * NOTE: priv->mutex is not required before calling this function
2278  */
2279 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
2280 {
2281         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2282                 clear_bit(STATUS_SCANNING, &priv->status);
2283                 return 0;
2284         }
2285
2286         if (test_bit(STATUS_SCANNING, &priv->status)) {
2287                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2288                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2289                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2290                         queue_work(priv->workqueue, &priv->abort_scan);
2291
2292                 } else
2293                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2294
2295                 return test_bit(STATUS_SCANNING, &priv->status);
2296         }
2297
2298         return 0;
2299 }
2300
2301 /**
2302  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2303  * @ms: amount of time to wait (in milliseconds) for scan to abort
2304  *
2305  * NOTE: priv->mutex must be held before calling this function
2306  */
2307 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2308 {
2309         unsigned long now = jiffies;
2310         int ret;
2311
2312         ret = iwl3945_scan_cancel(priv);
2313         if (ret && ms) {
2314                 mutex_unlock(&priv->mutex);
2315                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2316                                 test_bit(STATUS_SCANNING, &priv->status))
2317                         msleep(1);
2318                 mutex_lock(&priv->mutex);
2319
2320                 return test_bit(STATUS_SCANNING, &priv->status);
2321         }
2322
2323         return ret;
2324 }
2325
2326 static void iwl3945_sequence_reset(struct iwl3945_priv *priv)
2327 {
2328         /* Reset ieee stats */
2329
2330         /* We don't reset the net_device_stats (ieee->stats) on
2331          * re-association */
2332
2333         priv->last_seq_num = -1;
2334         priv->last_frag_num = -1;
2335         priv->last_packet_time = 0;
2336
2337         iwl3945_scan_cancel(priv);
2338 }
2339
2340 #define MAX_UCODE_BEACON_INTERVAL       1024
2341 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2342
2343 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2344 {
2345         u16 new_val = 0;
2346         u16 beacon_factor = 0;
2347
2348         beacon_factor =
2349             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2350                 / MAX_UCODE_BEACON_INTERVAL;
2351         new_val = beacon_val / beacon_factor;
2352
2353         return cpu_to_le16(new_val);
2354 }
2355
2356 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2357 {
2358         u64 interval_tm_unit;
2359         u64 tsf, result;
2360         unsigned long flags;
2361         struct ieee80211_conf *conf = NULL;
2362         u16 beacon_int = 0;
2363
2364         conf = ieee80211_get_hw_conf(priv->hw);
2365
2366         spin_lock_irqsave(&priv->lock, flags);
2367         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2368         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2369
2370         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2371
2372         tsf = priv->timestamp1;
2373         tsf = ((tsf << 32) | priv->timestamp0);
2374
2375         beacon_int = priv->beacon_int;
2376         spin_unlock_irqrestore(&priv->lock, flags);
2377
2378         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2379                 if (beacon_int == 0) {
2380                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2381                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2382                 } else {
2383                         priv->rxon_timing.beacon_interval =
2384                                 cpu_to_le16(beacon_int);
2385                         priv->rxon_timing.beacon_interval =
2386                             iwl3945_adjust_beacon_interval(
2387                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2388                 }
2389
2390                 priv->rxon_timing.atim_window = 0;
2391         } else {
2392                 priv->rxon_timing.beacon_interval =
2393                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2394                 /* TODO: we need to get atim_window from upper stack
2395                  * for now we set to 0 */
2396                 priv->rxon_timing.atim_window = 0;
2397         }
2398
2399         interval_tm_unit =
2400                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2401         result = do_div(tsf, interval_tm_unit);
2402         priv->rxon_timing.beacon_init_val =
2403             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2404
2405         IWL_DEBUG_ASSOC
2406             ("beacon interval %d beacon timer %d beacon tim %d\n",
2407                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2408                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2409                 le16_to_cpu(priv->rxon_timing.atim_window));
2410 }
2411
2412 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2413 {
2414         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2415                 IWL_ERROR("APs don't scan.\n");
2416                 return 0;
2417         }
2418
2419         if (!iwl3945_is_ready_rf(priv)) {
2420                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2421                 return -EIO;
2422         }
2423
2424         if (test_bit(STATUS_SCANNING, &priv->status)) {
2425                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2426                 return -EAGAIN;
2427         }
2428
2429         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2430                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2431                                "Queuing.\n");
2432                 return -EAGAIN;
2433         }
2434
2435         IWL_DEBUG_INFO("Starting scan...\n");
2436         priv->scan_bands = 2;
2437         set_bit(STATUS_SCANNING, &priv->status);
2438         priv->scan_start = jiffies;
2439         priv->scan_pass_start = priv->scan_start;
2440
2441         queue_work(priv->workqueue, &priv->request_scan);
2442
2443         return 0;
2444 }
2445
2446 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2447 {
2448         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2449
2450         if (hw_decrypt)
2451                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2452         else
2453                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2454
2455         return 0;
2456 }
2457
2458 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv, u8 phymode)
2459 {
2460         if (phymode == MODE_IEEE80211A) {
2461                 priv->staging_rxon.flags &=
2462                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2463                       | RXON_FLG_CCK_MSK);
2464                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2465         } else {
2466                 /* Copied from iwl3945_bg_post_associate() */
2467                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2468                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2469                 else
2470                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2471
2472                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2473                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2474
2475                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2476                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2477                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2478         }
2479 }
2480
2481 /*
2482  * initialize rxon structure with default values from eeprom
2483  */
2484 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv)
2485 {
2486         const struct iwl3945_channel_info *ch_info;
2487
2488         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2489
2490         switch (priv->iw_mode) {
2491         case IEEE80211_IF_TYPE_AP:
2492                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2493                 break;
2494
2495         case IEEE80211_IF_TYPE_STA:
2496                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2497                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2498                 break;
2499
2500         case IEEE80211_IF_TYPE_IBSS:
2501                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2502                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2503                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2504                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2505                 break;
2506
2507         case IEEE80211_IF_TYPE_MNTR:
2508                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2509                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2510                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2511                 break;
2512         }
2513
2514 #if 0
2515         /* TODO:  Figure out when short_preamble would be set and cache from
2516          * that */
2517         if (!hw_to_local(priv->hw)->short_preamble)
2518                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2519         else
2520                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2521 #endif
2522
2523         ch_info = iwl3945_get_channel_info(priv, priv->phymode,
2524                                        le16_to_cpu(priv->staging_rxon.channel));
2525
2526         if (!ch_info)
2527                 ch_info = &priv->channel_info[0];
2528
2529         /*
2530          * in some case A channels are all non IBSS
2531          * in this case force B/G channel
2532          */
2533         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2534             !(is_channel_ibss(ch_info)))
2535                 ch_info = &priv->channel_info[0];
2536
2537         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2538         if (is_channel_a_band(ch_info))
2539                 priv->phymode = MODE_IEEE80211A;
2540         else
2541                 priv->phymode = MODE_IEEE80211G;
2542
2543         iwl3945_set_flags_for_phymode(priv, priv->phymode);
2544
2545         priv->staging_rxon.ofdm_basic_rates =
2546             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2547         priv->staging_rxon.cck_basic_rates =
2548             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2549 }
2550
2551 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2552 {
2553         if (mode == IEEE80211_IF_TYPE_IBSS) {
2554                 const struct iwl3945_channel_info *ch_info;
2555
2556                 ch_info = iwl3945_get_channel_info(priv,
2557                         priv->phymode,
2558                         le16_to_cpu(priv->staging_rxon.channel));
2559
2560                 if (!ch_info || !is_channel_ibss(ch_info)) {
2561                         IWL_ERROR("channel %d not IBSS channel\n",
2562                                   le16_to_cpu(priv->staging_rxon.channel));
2563                         return -EINVAL;
2564                 }
2565         }
2566
2567         priv->iw_mode = mode;
2568
2569         iwl3945_connection_init_rx_config(priv);
2570         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2571
2572         iwl3945_clear_stations_table(priv);
2573
2574         /* dont commit rxon if rf-kill is on*/
2575         if (!iwl3945_is_ready_rf(priv))
2576                 return -EAGAIN;
2577
2578         cancel_delayed_work(&priv->scan_check);
2579         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2580                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2581                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2582                 return -EAGAIN;
2583         }
2584
2585         iwl3945_commit_rxon(priv);
2586
2587         return 0;
2588 }
2589
2590 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2591                                       struct ieee80211_tx_control *ctl,
2592                                       struct iwl3945_cmd *cmd,
2593                                       struct sk_buff *skb_frag,
2594                                       int last_frag)
2595 {
2596         struct iwl3945_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2597
2598         switch (keyinfo->alg) {
2599         case ALG_CCMP:
2600                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2601                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2602                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2603                 break;
2604
2605         case ALG_TKIP:
2606 #if 0
2607                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2608
2609                 if (last_frag)
2610                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2611                                8);
2612                 else
2613                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2614 #endif
2615                 break;
2616
2617         case ALG_WEP:
2618                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2619                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2620
2621                 if (keyinfo->keylen == 13)
2622                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2623
2624                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2625
2626                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2627                              "with key %d\n", ctl->key_idx);
2628                 break;
2629
2630         default:
2631                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2632                 break;
2633         }
2634 }
2635
2636 /*
2637  * handle build REPLY_TX command notification.
2638  */
2639 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2640                                   struct iwl3945_cmd *cmd,
2641                                   struct ieee80211_tx_control *ctrl,
2642                                   struct ieee80211_hdr *hdr,
2643                                   int is_unicast, u8 std_id)
2644 {
2645         __le16 *qc;
2646         u16 fc = le16_to_cpu(hdr->frame_control);
2647         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2648
2649         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2650         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2651                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2652                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2653                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2654                 if (ieee80211_is_probe_response(fc) &&
2655                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2656                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2657         } else {
2658                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2659                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2660         }
2661
2662         cmd->cmd.tx.sta_id = std_id;
2663         if (ieee80211_get_morefrag(hdr))
2664                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2665
2666         qc = ieee80211_get_qos_ctrl(hdr);
2667         if (qc) {
2668                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2669                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2670         } else
2671                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2672
2673         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2674                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2675                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2676         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2677                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2678                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2679         }
2680
2681         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2682                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2683
2684         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2685         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2686                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2687                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2688                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2689                 else
2690                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2691         } else
2692                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2693
2694         cmd->cmd.tx.driver_txop = 0;
2695         cmd->cmd.tx.tx_flags = tx_flags;
2696         cmd->cmd.tx.next_frame_len = 0;
2697 }
2698
2699 /**
2700  * iwl3945_get_sta_id - Find station's index within station table
2701  */
2702 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2703 {
2704         int sta_id;
2705         u16 fc = le16_to_cpu(hdr->frame_control);
2706
2707         /* If this frame is broadcast or management, use broadcast station id */
2708         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2709             is_multicast_ether_addr(hdr->addr1))
2710                 return priv->hw_setting.bcast_sta_id;
2711
2712         switch (priv->iw_mode) {
2713
2714         /* If we are a client station in a BSS network, use the special
2715          * AP station entry (that's the only station we communicate with) */
2716         case IEEE80211_IF_TYPE_STA:
2717                 return IWL_AP_ID;
2718
2719         /* If we are an AP, then find the station, or use BCAST */
2720         case IEEE80211_IF_TYPE_AP:
2721                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2722                 if (sta_id != IWL_INVALID_STATION)
2723                         return sta_id;
2724                 return priv->hw_setting.bcast_sta_id;
2725
2726         /* If this frame is going out to an IBSS network, find the station,
2727          * or create a new station table entry */
2728         case IEEE80211_IF_TYPE_IBSS: {
2729                 DECLARE_MAC_BUF(mac);
2730
2731                 /* Create new station table entry */
2732                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2733                 if (sta_id != IWL_INVALID_STATION)
2734                         return sta_id;
2735
2736                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2737
2738                 if (sta_id != IWL_INVALID_STATION)
2739                         return sta_id;
2740
2741                 IWL_DEBUG_DROP("Station %s not in station map. "
2742                                "Defaulting to broadcast...\n",
2743                                print_mac(mac, hdr->addr1));
2744                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2745                 return priv->hw_setting.bcast_sta_id;
2746         }
2747         default:
2748                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2749                 return priv->hw_setting.bcast_sta_id;
2750         }
2751 }
2752
2753 /*
2754  * start REPLY_TX command process
2755  */
2756 static int iwl3945_tx_skb(struct iwl3945_priv *priv,
2757                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2758 {
2759         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2760         struct iwl3945_tfd_frame *tfd;
2761         u32 *control_flags;
2762         int txq_id = ctl->queue;
2763         struct iwl3945_tx_queue *txq = NULL;
2764         struct iwl3945_queue *q = NULL;
2765         dma_addr_t phys_addr;
2766         dma_addr_t txcmd_phys;
2767         struct iwl3945_cmd *out_cmd = NULL;
2768         u16 len, idx, len_org;
2769         u8 id, hdr_len, unicast;
2770         u8 sta_id;
2771         u16 seq_number = 0;
2772         u16 fc;
2773         __le16 *qc;
2774         u8 wait_write_ptr = 0;
2775         unsigned long flags;
2776         int rc;
2777
2778         spin_lock_irqsave(&priv->lock, flags);
2779         if (iwl3945_is_rfkill(priv)) {
2780                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2781                 goto drop_unlock;
2782         }
2783
2784         if (!priv->vif) {
2785                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2786                 goto drop_unlock;
2787         }
2788
2789         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2790                 IWL_ERROR("ERROR: No TX rate available.\n");
2791                 goto drop_unlock;
2792         }
2793
2794         unicast = !is_multicast_ether_addr(hdr->addr1);
2795         id = 0;
2796
2797         fc = le16_to_cpu(hdr->frame_control);
2798
2799 #ifdef CONFIG_IWL3945_DEBUG
2800         if (ieee80211_is_auth(fc))
2801                 IWL_DEBUG_TX("Sending AUTH frame\n");
2802         else if (ieee80211_is_assoc_request(fc))
2803                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2804         else if (ieee80211_is_reassoc_request(fc))
2805                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2806 #endif
2807
2808         /* drop all data frame if we are not associated */
2809         if ((!iwl3945_is_associated(priv) || !priv->assoc_id) &&
2810             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2811                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2812                 goto drop_unlock;
2813         }
2814
2815         spin_unlock_irqrestore(&priv->lock, flags);
2816
2817         hdr_len = ieee80211_get_hdrlen(fc);
2818
2819         /* Find (or create) index into station table for destination station */
2820         sta_id = iwl3945_get_sta_id(priv, hdr);
2821         if (sta_id == IWL_INVALID_STATION) {
2822                 DECLARE_MAC_BUF(mac);
2823
2824                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2825                                print_mac(mac, hdr->addr1));
2826                 goto drop;
2827         }
2828
2829         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2830
2831         qc = ieee80211_get_qos_ctrl(hdr);
2832         if (qc) {
2833                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2834                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2835                                 IEEE80211_SCTL_SEQ;
2836                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2837                         (hdr->seq_ctrl &
2838                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2839                 seq_number += 0x10;
2840         }
2841
2842         /* Descriptor for chosen Tx queue */
2843         txq = &priv->txq[txq_id];
2844         q = &txq->q;
2845
2846         spin_lock_irqsave(&priv->lock, flags);
2847
2848         /* Set up first empty TFD within this queue's circular TFD buffer */
2849         tfd = &txq->bd[q->write_ptr];
2850         memset(tfd, 0, sizeof(*tfd));
2851         control_flags = (u32 *) tfd;
2852         idx = get_cmd_index(q, q->write_ptr, 0);
2853
2854         /* Set up driver data for this TFD */
2855         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2856         txq->txb[q->write_ptr].skb[0] = skb;
2857         memcpy(&(txq->txb[q->write_ptr].status.control),
2858                ctl, sizeof(struct ieee80211_tx_control));
2859
2860         /* Init first empty entry in queue's array of Tx/cmd buffers */
2861         out_cmd = &txq->cmd[idx];
2862         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2863         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2864
2865         /*
2866          * Set up the Tx-command (not MAC!) header.
2867          * Store the chosen Tx queue and TFD index within the sequence field;
2868          * after Tx, uCode's Tx response will return this value so driver can
2869          * locate the frame within the tx queue and do post-tx processing.
2870          */
2871         out_cmd->hdr.cmd = REPLY_TX;
2872         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2873                                 INDEX_TO_SEQ(q->write_ptr)));
2874
2875         /* Copy MAC header from skb into command buffer */
2876         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2877
2878         /*
2879          * Use the first empty entry in this queue's command buffer array
2880          * to contain the Tx command and MAC header concatenated together
2881          * (payload data will be in another buffer).
2882          * Size of this varies, due to varying MAC header length.
2883          * If end is not dword aligned, we'll have 2 extra bytes at the end
2884          * of the MAC header (device reads on dword boundaries).
2885          * We'll tell device about this padding later.
2886          */
2887         len = priv->hw_setting.tx_cmd_len +
2888                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2889
2890         len_org = len;
2891         len = (len + 3) & ~3;
2892
2893         if (len_org != len)
2894                 len_org = 1;
2895         else
2896                 len_org = 0;
2897
2898         /* Physical address of this Tx command's header (not MAC header!),
2899          * within command buffer array. */
2900         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2901                      offsetof(struct iwl3945_cmd, hdr);
2902
2903         /* Add buffer containing Tx command and MAC(!) header to TFD's
2904          * first entry */
2905         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2906
2907         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2908                 iwl3945_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2909
2910         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2911          * if any (802.11 null frames have no payload). */
2912         len = skb->len - hdr_len;
2913         if (len) {
2914                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2915                                            len, PCI_DMA_TODEVICE);
2916                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2917         }
2918
2919         if (!len)
2920                 /* If there is no payload, then we use only one Tx buffer */
2921                 *control_flags = TFD_CTL_COUNT_SET(1);
2922         else
2923                 /* Else use 2 buffers.
2924                  * Tell 3945 about any padding after MAC header */
2925                 *control_flags = TFD_CTL_COUNT_SET(2) |
2926                         TFD_CTL_PAD_SET(U32_PAD(len));
2927
2928         /* Total # bytes to be transmitted */
2929         len = (u16)skb->len;
2930         out_cmd->cmd.tx.len = cpu_to_le16(len);
2931
2932         /* TODO need this for burst mode later on */
2933         iwl3945_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2934
2935         /* set is_hcca to 0; it probably will never be implemented */
2936         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2937
2938         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2939         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2940
2941         if (!ieee80211_get_morefrag(hdr)) {
2942                 txq->need_update = 1;
2943                 if (qc) {
2944                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2945                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2946                 }
2947         } else {
2948                 wait_write_ptr = 1;
2949                 txq->need_update = 0;
2950         }
2951
2952         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2953                            sizeof(out_cmd->cmd.tx));
2954
2955         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2956                            ieee80211_get_hdrlen(fc));
2957
2958         /* Tell device the write index *just past* this latest filled TFD */
2959         q->write_ptr = iwl3945_queue_inc_wrap(q->write_ptr, q->n_bd);
2960         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2961         spin_unlock_irqrestore(&priv->lock, flags);
2962
2963         if (rc)
2964                 return rc;
2965
2966         if ((iwl3945_queue_space(q) < q->high_mark)
2967             && priv->mac80211_registered) {
2968                 if (wait_write_ptr) {
2969                         spin_lock_irqsave(&priv->lock, flags);
2970                         txq->need_update = 1;
2971                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2972                         spin_unlock_irqrestore(&priv->lock, flags);
2973                 }
2974
2975                 ieee80211_stop_queue(priv->hw, ctl->queue);
2976         }
2977
2978         return 0;
2979
2980 drop_unlock:
2981         spin_unlock_irqrestore(&priv->lock, flags);
2982 drop:
2983         return -1;
2984 }
2985
2986 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2987 {
2988         const struct ieee80211_hw_mode *hw = NULL;
2989         struct ieee80211_rate *rate;
2990         int i;
2991
2992         hw = iwl3945_get_hw_mode(priv, priv->phymode);
2993         if (!hw) {
2994                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2995                 return;
2996         }
2997
2998         priv->active_rate = 0;
2999         priv->active_rate_basic = 0;
3000
3001         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3002                        hw->mode == MODE_IEEE80211A ?
3003                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3004
3005         for (i = 0; i < hw->num_rates; i++) {
3006                 rate = &(hw->rates[i]);
3007                 if ((rate->val < IWL_RATE_COUNT) &&
3008                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3009                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3010                                        rate->val, iwl3945_rates[rate->val].plcp,
3011                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3012                                        "*" : "");
3013                         priv->active_rate |= (1 << rate->val);
3014                         if (rate->flags & IEEE80211_RATE_BASIC)
3015                                 priv->active_rate_basic |= (1 << rate->val);
3016                 } else
3017                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3018                                        rate->val, iwl3945_rates[rate->val].plcp);
3019         }
3020
3021         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3022                        priv->active_rate, priv->active_rate_basic);
3023
3024         /*
3025          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3026          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3027          * OFDM
3028          */
3029         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3030                 priv->staging_rxon.cck_basic_rates =
3031                     ((priv->active_rate_basic &
3032                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3033         else
3034                 priv->staging_rxon.cck_basic_rates =
3035                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3036
3037         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3038                 priv->staging_rxon.ofdm_basic_rates =
3039                     ((priv->active_rate_basic &
3040                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3041                       IWL_FIRST_OFDM_RATE) & 0xFF;
3042         else
3043                 priv->staging_rxon.ofdm_basic_rates =
3044                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3045 }
3046
3047 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
3048 {
3049         unsigned long flags;
3050
3051         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3052                 return;
3053
3054         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3055                           disable_radio ? "OFF" : "ON");
3056
3057         if (disable_radio) {
3058                 iwl3945_scan_cancel(priv);
3059                 /* FIXME: This is a workaround for AP */
3060                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3061                         spin_lock_irqsave(&priv->lock, flags);
3062                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3063                                     CSR_UCODE_SW_BIT_RFKILL);
3064                         spin_unlock_irqrestore(&priv->lock, flags);
3065                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3066                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3067                 }
3068                 return;
3069         }
3070
3071         spin_lock_irqsave(&priv->lock, flags);
3072         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3073
3074         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3075         spin_unlock_irqrestore(&priv->lock, flags);
3076
3077         /* wake up ucode */
3078         msleep(10);
3079
3080         spin_lock_irqsave(&priv->lock, flags);
3081         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3082         if (!iwl3945_grab_nic_access(priv))
3083                 iwl3945_release_nic_access(priv);
3084         spin_unlock_irqrestore(&priv->lock, flags);
3085
3086         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3087                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3088                                   "disabled by HW switch\n");
3089                 return;
3090         }
3091
3092         queue_work(priv->workqueue, &priv->restart);
3093         return;
3094 }
3095
3096 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
3097                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3098 {
3099         u16 fc =
3100             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3101
3102         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3103                 return;
3104
3105         if (!(fc & IEEE80211_FCTL_PROTECTED))
3106                 return;
3107
3108         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3109         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3110         case RX_RES_STATUS_SEC_TYPE_TKIP:
3111                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3112                     RX_RES_STATUS_BAD_ICV_MIC)
3113                         stats->flag |= RX_FLAG_MMIC_ERROR;
3114         case RX_RES_STATUS_SEC_TYPE_WEP:
3115         case RX_RES_STATUS_SEC_TYPE_CCMP:
3116                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3117                     RX_RES_STATUS_DECRYPT_OK) {
3118                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3119                         stats->flag |= RX_FLAG_DECRYPTED;
3120                 }
3121                 break;
3122
3123         default:
3124                 break;
3125         }
3126 }
3127
3128 #define IWL_PACKET_RETRY_TIME HZ
3129
3130 int iwl3945_is_duplicate_packet(struct iwl3945_priv *priv, struct ieee80211_hdr *header)
3131 {
3132         u16 sc = le16_to_cpu(header->seq_ctrl);
3133         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3134         u16 frag = sc & IEEE80211_SCTL_FRAG;
3135         u16 *last_seq, *last_frag;
3136         unsigned long *last_time;
3137
3138         switch (priv->iw_mode) {
3139         case IEEE80211_IF_TYPE_IBSS:{
3140                 struct list_head *p;
3141                 struct iwl3945_ibss_seq *entry = NULL;
3142                 u8 *mac = header->addr2;
3143                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3144
3145                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3146                         entry = list_entry(p, struct iwl3945_ibss_seq, list);
3147                         if (!compare_ether_addr(entry->mac, mac))
3148                                 break;
3149                 }
3150                 if (p == &priv->ibss_mac_hash[index]) {
3151                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3152                         if (!entry) {
3153                                 IWL_ERROR("Cannot malloc new mac entry\n");
3154                                 return 0;
3155                         }
3156                         memcpy(entry->mac, mac, ETH_ALEN);
3157                         entry->seq_num = seq;
3158                         entry->frag_num = frag;
3159                         entry->packet_time = jiffies;
3160                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3161                         return 0;
3162                 }
3163                 last_seq = &entry->seq_num;
3164                 last_frag = &entry->frag_num;
3165                 last_time = &entry->packet_time;
3166                 break;
3167         }
3168         case IEEE80211_IF_TYPE_STA:
3169                 last_seq = &priv->last_seq_num;
3170                 last_frag = &priv->last_frag_num;
3171                 last_time = &priv->last_packet_time;
3172                 break;
3173         default:
3174                 return 0;
3175         }
3176         if ((*last_seq == seq) &&
3177             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3178                 if (*last_frag == frag)
3179                         goto drop;
3180                 if (*last_frag + 1 != frag)
3181                         /* out-of-order fragment */
3182                         goto drop;
3183         } else
3184                 *last_seq = seq;
3185
3186         *last_frag = frag;
3187         *last_time = jiffies;
3188         return 0;
3189
3190  drop:
3191         return 1;
3192 }
3193
3194 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3195
3196 #include "iwl-spectrum.h"
3197
3198 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3199 #define BEACON_TIME_MASK_HIGH   0xFF000000
3200 #define TIME_UNIT               1024
3201
3202 /*
3203  * extended beacon time format
3204  * time in usec will be changed into a 32-bit value in 8:24 format
3205  * the high 1 byte is the beacon counts
3206  * the lower 3 bytes is the time in usec within one beacon interval
3207  */
3208
3209 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
3210 {
3211         u32 quot;
3212         u32 rem;
3213         u32 interval = beacon_interval * 1024;
3214
3215         if (!interval || !usec)
3216                 return 0;
3217
3218         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3219         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3220
3221         return (quot << 24) + rem;
3222 }
3223
3224 /* base is usually what we get from ucode with each received frame,
3225  * the same as HW timer counter counting down
3226  */
3227
3228 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3229 {
3230         u32 base_low = base & BEACON_TIME_MASK_LOW;
3231         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3232         u32 interval = beacon_interval * TIME_UNIT;
3233         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3234             (addon & BEACON_TIME_MASK_HIGH);
3235
3236         if (base_low > addon_low)
3237                 res += base_low - addon_low;
3238         else if (base_low < addon_low) {
3239                 res += interval + base_low - addon_low;
3240                 res += (1 << 24);
3241         } else
3242                 res += (1 << 24);
3243
3244         return cpu_to_le32(res);
3245 }
3246
3247 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
3248                                struct ieee80211_measurement_params *params,
3249                                u8 type)
3250 {
3251         struct iwl3945_spectrum_cmd spectrum;
3252         struct iwl3945_rx_packet *res;
3253         struct iwl3945_host_cmd cmd = {
3254                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3255                 .data = (void *)&spectrum,
3256                 .meta.flags = CMD_WANT_SKB,
3257         };
3258         u32 add_time = le64_to_cpu(params->start_time);
3259         int rc;
3260         int spectrum_resp_status;
3261         int duration = le16_to_cpu(params->duration);
3262
3263         if (iwl3945_is_associated(priv))
3264                 add_time =
3265                     iwl3945_usecs_to_beacons(
3266                         le64_to_cpu(params->start_time) - priv->last_tsf,
3267                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3268
3269         memset(&spectrum, 0, sizeof(spectrum));
3270
3271         spectrum.channel_count = cpu_to_le16(1);
3272         spectrum.flags =
3273             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3274         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3275         cmd.len = sizeof(spectrum);
3276         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3277
3278         if (iwl3945_is_associated(priv))
3279                 spectrum.start_time =
3280                     iwl3945_add_beacon_time(priv->last_beacon_time,
3281                                 add_time,
3282                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3283         else
3284                 spectrum.start_time = 0;
3285
3286         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3287         spectrum.channels[0].channel = params->channel;
3288         spectrum.channels[0].type = type;
3289         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3290                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3291                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3292
3293         rc = iwl3945_send_cmd_sync(priv, &cmd);
3294         if (rc)
3295                 return rc;
3296
3297         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
3298         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3299                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3300                 rc = -EIO;
3301         }
3302
3303         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3304         switch (spectrum_resp_status) {
3305         case 0:         /* Command will be handled */
3306                 if (res->u.spectrum.id != 0xff) {
3307                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
3308                                                 res->u.spectrum.id);
3309                         priv->measurement_status &= ~MEASUREMENT_READY;
3310                 }
3311                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3312                 rc = 0;
3313                 break;
3314
3315         case 1:         /* Command will not be handled */
3316                 rc = -EAGAIN;
3317                 break;
3318         }
3319
3320         dev_kfree_skb_any(cmd.meta.u.skb);
3321
3322         return rc;
3323 }
3324 #endif
3325
3326 static void iwl3945_txstatus_to_ieee(struct iwl3945_priv *priv,
3327                                  struct iwl3945_tx_info *tx_sta)
3328 {
3329
3330         tx_sta->status.ack_signal = 0;
3331         tx_sta->status.excessive_retries = 0;
3332         tx_sta->status.queue_length = 0;
3333         tx_sta->status.queue_number = 0;
3334
3335         if (in_interrupt())
3336                 ieee80211_tx_status_irqsafe(priv->hw,
3337                                             tx_sta->skb[0], &(tx_sta->status));
3338         else
3339                 ieee80211_tx_status(priv->hw,
3340                                     tx_sta->skb[0], &(tx_sta->status));
3341
3342         tx_sta->skb[0] = NULL;
3343 }
3344
3345 /**
3346  * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3347  *
3348  * When FW advances 'R' index, all entries between old and new 'R' index
3349  * need to be reclaimed. As result, some free space forms. If there is
3350  * enough free space (> low mark), wake the stack that feeds us.
3351  */
3352 static int iwl3945_tx_queue_reclaim(struct iwl3945_priv *priv, int txq_id, int index)
3353 {
3354         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3355         struct iwl3945_queue *q = &txq->q;
3356         int nfreed = 0;
3357
3358         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3359                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3360                           "is out of range [0-%d] %d %d.\n", txq_id,
3361                           index, q->n_bd, q->write_ptr, q->read_ptr);
3362                 return 0;
3363         }
3364
3365         for (index = iwl3945_queue_inc_wrap(index, q->n_bd);
3366                 q->read_ptr != index;
3367                 q->read_ptr = iwl3945_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3368                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3369                         iwl3945_txstatus_to_ieee(priv,
3370                                         &(txq->txb[txq->q.read_ptr]));
3371                         iwl3945_hw_txq_free_tfd(priv, txq);
3372                 } else if (nfreed > 1) {
3373                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3374                                         q->write_ptr, q->read_ptr);
3375                         queue_work(priv->workqueue, &priv->restart);
3376                 }
3377                 nfreed++;
3378         }
3379
3380         if (iwl3945_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3381                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3382                         priv->mac80211_registered)
3383                 ieee80211_wake_queue(priv->hw, txq_id);
3384
3385
3386         return nfreed;
3387 }
3388
3389 static int iwl3945_is_tx_success(u32 status)
3390 {
3391         return (status & 0xFF) == 0x1;
3392 }
3393
3394 /******************************************************************************
3395  *
3396  * Generic RX handler implementations
3397  *
3398  ******************************************************************************/
3399 /**
3400  * iwl3945_rx_reply_tx - Handle Tx response
3401  */
3402 static void iwl3945_rx_reply_tx(struct iwl3945_priv *priv,
3403                             struct iwl3945_rx_mem_buffer *rxb)
3404 {
3405         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3406         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3407         int txq_id = SEQ_TO_QUEUE(sequence);
3408         int index = SEQ_TO_INDEX(sequence);
3409         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3410         struct ieee80211_tx_status *tx_status;
3411         struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3412         u32  status = le32_to_cpu(tx_resp->status);
3413
3414         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3415                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3416                           "is out of range [0-%d] %d %d\n", txq_id,
3417                           index, txq->q.n_bd, txq->q.write_ptr,
3418                           txq->q.read_ptr);
3419                 return;
3420         }
3421
3422         tx_status = &(txq->txb[txq->q.read_ptr].status);
3423
3424         tx_status->retry_count = tx_resp->failure_frame;
3425         tx_status->queue_number = status;
3426         tx_status->queue_length = tx_resp->bt_kill_count;
3427         tx_status->queue_length |= tx_resp->failure_rts;
3428
3429         tx_status->flags =
3430             iwl3945_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3431
3432         tx_status->control.tx_rate = iwl3945_rate_index_from_plcp(tx_resp->rate);
3433
3434         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3435                         txq_id, iwl3945_get_tx_fail_reason(status), status,
3436                         tx_resp->rate, tx_resp->failure_frame);
3437
3438         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3439         if (index != -1)
3440                 iwl3945_tx_queue_reclaim(priv, txq_id, index);
3441
3442         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3443                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3444 }
3445
3446
3447 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
3448                                struct iwl3945_rx_mem_buffer *rxb)
3449 {
3450         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3451         struct iwl3945_alive_resp *palive;
3452         struct delayed_work *pwork;
3453
3454         palive = &pkt->u.alive_frame;
3455
3456         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3457                        "0x%01X 0x%01X\n",
3458                        palive->is_valid, palive->ver_type,
3459                        palive->ver_subtype);
3460
3461         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3462                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3463                 memcpy(&priv->card_alive_init,
3464                        &pkt->u.alive_frame,
3465                        sizeof(struct iwl3945_init_alive_resp));
3466                 pwork = &priv->init_alive_start;
3467         } else {
3468                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3469                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3470                        sizeof(struct iwl3945_alive_resp));
3471                 pwork = &priv->alive_start;
3472                 iwl3945_disable_events(priv);
3473         }
3474
3475         /* We delay the ALIVE response by 5ms to
3476          * give the HW RF Kill time to activate... */
3477         if (palive->is_valid == UCODE_VALID_OK)
3478                 queue_delayed_work(priv->workqueue, pwork,
3479                                    msecs_to_jiffies(5));
3480         else
3481                 IWL_WARNING("uCode did not respond OK.\n");
3482 }
3483
3484 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
3485                                  struct iwl3945_rx_mem_buffer *rxb)
3486 {
3487         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3488
3489         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3490         return;
3491 }
3492
3493 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
3494                                struct iwl3945_rx_mem_buffer *rxb)
3495 {
3496         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3497
3498         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3499                 "seq 0x%04X ser 0x%08X\n",
3500                 le32_to_cpu(pkt->u.err_resp.error_type),
3501                 get_cmd_string(pkt->u.err_resp.cmd_id),
3502                 pkt->u.err_resp.cmd_id,
3503                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3504                 le32_to_cpu(pkt->u.err_resp.error_info));
3505 }
3506
3507 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3508
3509 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3510 {
3511         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3512         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3513         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3514         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3515                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3516         rxon->channel = csa->channel;
3517         priv->staging_rxon.channel = csa->channel;
3518 }
3519
3520 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3521                                           struct iwl3945_rx_mem_buffer *rxb)
3522 {
3523 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3524         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3525         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3526
3527         if (!report->state) {
3528                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3529                           "Spectrum Measure Notification: Start\n");
3530                 return;
3531         }
3532
3533         memcpy(&priv->measure_report, report, sizeof(*report));
3534         priv->measurement_status |= MEASUREMENT_READY;
3535 #endif
3536 }
3537
3538 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3539                                   struct iwl3945_rx_mem_buffer *rxb)
3540 {
3541 #ifdef CONFIG_IWL3945_DEBUG
3542         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3543         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3544         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3545                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3546 #endif
3547 }
3548
3549 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3550                                              struct iwl3945_rx_mem_buffer *rxb)
3551 {
3552         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3553         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3554                         "notification for %s:\n",
3555                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3556         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3557 }
3558
3559 static void iwl3945_bg_beacon_update(struct work_struct *work)
3560 {
3561         struct iwl3945_priv *priv =
3562                 container_of(work, struct iwl3945_priv, beacon_update);
3563         struct sk_buff *beacon;
3564
3565         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3566         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3567
3568         if (!beacon) {
3569                 IWL_ERROR("update beacon failed\n");
3570                 return;
3571         }
3572
3573         mutex_lock(&priv->mutex);
3574         /* new beacon skb is allocated every time; dispose previous.*/
3575         if (priv->ibss_beacon)
3576                 dev_kfree_skb(priv->ibss_beacon);
3577
3578         priv->ibss_beacon = beacon;
3579         mutex_unlock(&priv->mutex);
3580
3581         iwl3945_send_beacon_cmd(priv);
3582 }
3583
3584 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3585                                 struct iwl3945_rx_mem_buffer *rxb)
3586 {
3587 #ifdef CONFIG_IWL3945_DEBUG
3588         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3589         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3590         u8 rate = beacon->beacon_notify_hdr.rate;
3591
3592         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3593                 "tsf %d %d rate %d\n",
3594                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3595                 beacon->beacon_notify_hdr.failure_frame,
3596                 le32_to_cpu(beacon->ibss_mgr_status),
3597                 le32_to_cpu(beacon->high_tsf),
3598                 le32_to_cpu(beacon->low_tsf), rate);
3599 #endif
3600
3601         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3602             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3603                 queue_work(priv->workqueue, &priv->beacon_update);
3604 }
3605
3606 /* Service response to REPLY_SCAN_CMD (0x80) */
3607 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3608                               struct iwl3945_rx_mem_buffer *rxb)
3609 {
3610 #ifdef CONFIG_IWL3945_DEBUG
3611         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3612         struct iwl3945_scanreq_notification *notif =
3613             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3614
3615         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3616 #endif
3617 }
3618
3619 /* Service SCAN_START_NOTIFICATION (0x82) */
3620 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3621                                     struct iwl3945_rx_mem_buffer *rxb)
3622 {
3623         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3624         struct iwl3945_scanstart_notification *notif =
3625             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3626         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3627         IWL_DEBUG_SCAN("Scan start: "
3628                        "%d [802.11%s] "
3629                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3630                        notif->channel,
3631                        notif->band ? "bg" : "a",
3632                        notif->tsf_high,
3633                        notif->tsf_low, notif->status, notif->beacon_timer);
3634 }
3635
3636 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3637 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3638                                       struct iwl3945_rx_mem_buffer *rxb)
3639 {
3640         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3641         struct iwl3945_scanresults_notification *notif =
3642             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3643
3644         IWL_DEBUG_SCAN("Scan ch.res: "
3645                        "%d [802.11%s] "
3646                        "(TSF: 0x%08X:%08X) - %d "
3647                        "elapsed=%lu usec (%dms since last)\n",
3648                        notif->channel,
3649                        notif->band ? "bg" : "a",
3650                        le32_to_cpu(notif->tsf_high),
3651                        le32_to_cpu(notif->tsf_low),
3652                        le32_to_cpu(notif->statistics[0]),
3653                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3654                        jiffies_to_msecs(elapsed_jiffies
3655                                         (priv->last_scan_jiffies, jiffies)));
3656
3657         priv->last_scan_jiffies = jiffies;
3658         priv->next_scan_jiffies = 0;
3659 }
3660
3661 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3662 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3663                                        struct iwl3945_rx_mem_buffer *rxb)
3664 {
3665         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3666         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3667
3668         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3669                        scan_notif->scanned_channels,
3670                        scan_notif->tsf_low,
3671                        scan_notif->tsf_high, scan_notif->status);
3672
3673         /* The HW is no longer scanning */
3674         clear_bit(STATUS_SCAN_HW, &priv->status);
3675
3676         /* The scan completion notification came in, so kill that timer... */
3677         cancel_delayed_work(&priv->scan_check);
3678
3679         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3680                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3681                        jiffies_to_msecs(elapsed_jiffies
3682                                         (priv->scan_pass_start, jiffies)));
3683
3684         /* Remove this scanned band from the list
3685          * of pending bands to scan */
3686         priv->scan_bands--;
3687
3688         /* If a request to abort was given, or the scan did not succeed
3689          * then we reset the scan state machine and terminate,
3690          * re-queuing another scan if one has been requested */
3691         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3692                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3693                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3694         } else {
3695                 /* If there are more bands on this scan pass reschedule */
3696                 if (priv->scan_bands > 0)
3697                         goto reschedule;
3698         }
3699
3700         priv->last_scan_jiffies = jiffies;
3701         priv->next_scan_jiffies = 0;
3702         IWL_DEBUG_INFO("Setting scan to off\n");
3703
3704         clear_bit(STATUS_SCANNING, &priv->status);
3705
3706         IWL_DEBUG_INFO("Scan took %dms\n",
3707                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3708
3709         queue_work(priv->workqueue, &priv->scan_completed);
3710
3711         return;
3712
3713 reschedule:
3714         priv->scan_pass_start = jiffies;
3715         queue_work(priv->workqueue, &priv->request_scan);
3716 }
3717
3718 /* Handle notification from uCode that card's power state is changing
3719  * due to software, hardware, or critical temperature RFKILL */
3720 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3721                                     struct iwl3945_rx_mem_buffer *rxb)
3722 {
3723         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3724         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3725         unsigned long status = priv->status;
3726
3727         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3728                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3729                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3730
3731         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3732                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3733
3734         if (flags & HW_CARD_DISABLED)
3735                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3736         else
3737                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3738
3739
3740         if (flags & SW_CARD_DISABLED)
3741                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3742         else
3743                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3744
3745         iwl3945_scan_cancel(priv);
3746
3747         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3748              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3749             (test_bit(STATUS_RF_KILL_SW, &status) !=
3750              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3751                 queue_work(priv->workqueue, &priv->rf_kill);
3752         else
3753                 wake_up_interruptible(&priv->wait_command_queue);
3754 }
3755
3756 /**
3757  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3758  *
3759  * Setup the RX handlers for each of the reply types sent from the uCode
3760  * to the host.
3761  *
3762  * This function chains into the hardware specific files for them to setup
3763  * any hardware specific handlers as well.
3764  */
3765 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3766 {
3767         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3768         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3769         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3770         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3771         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3772             iwl3945_rx_spectrum_measure_notif;
3773         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3774         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3775             iwl3945_rx_pm_debug_statistics_notif;
3776         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3777
3778         /*
3779          * The same handler is used for both the REPLY to a discrete
3780          * statistics request from the host as well as for the periodic
3781          * statistics notifications (after received beacons) from the uCode.
3782          */
3783         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3784         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3785
3786         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3787         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3788         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3789             iwl3945_rx_scan_results_notif;
3790         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3791             iwl3945_rx_scan_complete_notif;
3792         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3793         priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
3794
3795         /* Set up hardware specific Rx handlers */
3796         iwl3945_hw_rx_handler_setup(priv);
3797 }
3798
3799 /**
3800  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3801  * @rxb: Rx buffer to reclaim
3802  *
3803  * If an Rx buffer has an async callback associated with it the callback
3804  * will be executed.  The attached skb (if present) will only be freed
3805  * if the callback returns 1
3806  */
3807 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3808                                 struct iwl3945_rx_mem_buffer *rxb)
3809 {
3810         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3811         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3812         int txq_id = SEQ_TO_QUEUE(sequence);
3813         int index = SEQ_TO_INDEX(sequence);
3814         int huge = sequence & SEQ_HUGE_FRAME;
3815         int cmd_index;
3816         struct iwl3945_cmd *cmd;
3817
3818         /* If a Tx command is being handled and it isn't in the actual
3819          * command queue then there a command routing bug has been introduced
3820          * in the queue management code. */
3821         if (txq_id != IWL_CMD_QUEUE_NUM)
3822                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3823                           txq_id, pkt->hdr.cmd);
3824         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3825
3826         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3827         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3828
3829         /* Input error checking is done when commands are added to queue. */
3830         if (cmd->meta.flags & CMD_WANT_SKB) {
3831                 cmd->meta.source->u.skb = rxb->skb;
3832                 rxb->skb = NULL;
3833         } else if (cmd->meta.u.callback &&
3834                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3835                 rxb->skb = NULL;
3836
3837         iwl3945_tx_queue_reclaim(priv, txq_id, index);
3838
3839         if (!(cmd->meta.flags & CMD_ASYNC)) {
3840                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3841                 wake_up_interruptible(&priv->wait_command_queue);
3842         }
3843 }
3844
3845 /************************** RX-FUNCTIONS ****************************/
3846 /*
3847  * Rx theory of operation
3848  *
3849  * The host allocates 32 DMA target addresses and passes the host address
3850  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3851  * 0 to 31
3852  *
3853  * Rx Queue Indexes
3854  * The host/firmware share two index registers for managing the Rx buffers.
3855  *
3856  * The READ index maps to the first position that the firmware may be writing
3857  * to -- the driver can read up to (but not including) this position and get
3858  * good data.
3859  * The READ index is managed by the firmware once the card is enabled.
3860  *
3861  * The WRITE index maps to the last position the driver has read from -- the
3862  * position preceding WRITE is the last slot the firmware can place a packet.
3863  *
3864  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3865  * WRITE = READ.
3866  *
3867  * During initialization, the host sets up the READ queue position to the first
3868  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3869  *
3870  * When the firmware places a packet in a buffer, it will advance the READ index
3871  * and fire the RX interrupt.  The driver can then query the READ index and
3872  * process as many packets as possible, moving the WRITE index forward as it
3873  * resets the Rx queue buffers with new memory.
3874  *
3875  * The management in the driver is as follows:
3876  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3877  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3878  *   to replenish the iwl->rxq->rx_free.
3879  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3880  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3881  *   'processed' and 'read' driver indexes as well)
3882  * + A received packet is processed and handed to the kernel network stack,
3883  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3884  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3885  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3886  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3887  *   were enough free buffers and RX_STALLED is set it is cleared.
3888  *
3889  *
3890  * Driver sequence:
3891  *
3892  * iwl3945_rx_queue_alloc()   Allocates rx_free
3893  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3894  *                            iwl3945_rx_queue_restock
3895  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3896  *                            queue, updates firmware pointers, and updates
3897  *                            the WRITE index.  If insufficient rx_free buffers
3898  *                            are available, schedules iwl3945_rx_replenish
3899  *
3900  * -- enable interrupts --
3901  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3902  *                            READ INDEX, detaching the SKB from the pool.
3903  *                            Moves the packet buffer from queue to rx_used.
3904  *                            Calls iwl3945_rx_queue_restock to refill any empty
3905  *                            slots.
3906  * ...
3907  *
3908  */
3909
3910 /**
3911  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3912  */
3913 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3914 {
3915         int s = q->read - q->write;
3916         if (s <= 0)
3917                 s += RX_QUEUE_SIZE;
3918         /* keep some buffer to not confuse full and empty queue */
3919         s -= 2;
3920         if (s < 0)
3921                 s = 0;
3922         return s;
3923 }
3924
3925 /**
3926  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3927  */
3928 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3929 {
3930         u32 reg = 0;
3931         int rc = 0;
3932         unsigned long flags;
3933
3934         spin_lock_irqsave(&q->lock, flags);
3935
3936         if (q->need_update == 0)
3937                 goto exit_unlock;
3938
3939         /* If power-saving is in use, make sure device is awake */
3940         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3941                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3942
3943                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3944                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3945                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3946                         goto exit_unlock;
3947                 }
3948
3949                 rc = iwl3945_grab_nic_access(priv);
3950                 if (rc)
3951                         goto exit_unlock;
3952
3953                 /* Device expects a multiple of 8 */
3954                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3955                                      q->write & ~0x7);
3956                 iwl3945_release_nic_access(priv);
3957
3958         /* Else device is assumed to be awake */
3959         } else
3960                 /* Device expects a multiple of 8 */
3961                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3962
3963
3964         q->need_update = 0;
3965
3966  exit_unlock:
3967         spin_unlock_irqrestore(&q->lock, flags);
3968         return rc;
3969 }
3970
3971 /**
3972  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3973  */
3974 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3975                                           dma_addr_t dma_addr)
3976 {
3977         return cpu_to_le32((u32)dma_addr);
3978 }
3979
3980 /**
3981  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3982  *
3983  * If there are slots in the RX queue that need to be restocked,
3984  * and we have free pre-allocated buffers, fill the ranks as much
3985  * as we can, pulling from rx_free.
3986  *
3987  * This moves the 'write' index forward to catch up with 'processed', and
3988  * also updates the memory address in the firmware to reference the new
3989  * target buffer.
3990  */
3991 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3992 {
3993         struct iwl3945_rx_queue *rxq = &priv->rxq;
3994         struct list_head *element;
3995         struct iwl3945_rx_mem_buffer *rxb;
3996         unsigned long flags;
3997         int write, rc;
3998
3999         spin_lock_irqsave(&rxq->lock, flags);
4000         write = rxq->write & ~0x7;
4001         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4002                 /* Get next free Rx buffer, remove from free list */
4003                 element = rxq->rx_free.next;
4004                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
4005                 list_del(element);
4006
4007                 /* Point to Rx buffer via next RBD in circular buffer */
4008                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4009                 rxq->queue[rxq->write] = rxb;
4010                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4011                 rxq->free_count--;
4012         }
4013         spin_unlock_irqrestore(&rxq->lock, flags);
4014         /* If the pre-allocated buffer pool is dropping low, schedule to
4015          * refill it */
4016         if (rxq->free_count <= RX_LOW_WATERMARK)
4017                 queue_work(priv->workqueue, &priv->rx_replenish);
4018
4019
4020         /* If we've added more space for the firmware to place data, tell it.
4021          * Increment device's write pointer in multiples of 8. */
4022         if ((write != (rxq->write & ~0x7))
4023             || (abs(rxq->write - rxq->read) > 7)) {
4024                 spin_lock_irqsave(&rxq->lock, flags);
4025                 rxq->need_update = 1;
4026                 spin_unlock_irqrestore(&rxq->lock, flags);
4027                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
4028                 if (rc)
4029                         return rc;
4030         }
4031
4032         return 0;
4033 }
4034
4035 /**
4036  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
4037  *
4038  * When moving to rx_free an SKB is allocated for the slot.
4039  *
4040  * Also restock the Rx queue via iwl3945_rx_queue_restock.
4041  * This is called as a scheduled work item (except for during initialization)
4042  */
4043 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
4044 {
4045         struct iwl3945_rx_queue *rxq = &priv->rxq;
4046         struct list_head *element;
4047         struct iwl3945_rx_mem_buffer *rxb;
4048         unsigned long flags;
4049         spin_lock_irqsave(&rxq->lock, flags);
4050         while (!list_empty(&rxq->rx_used)) {
4051                 element = rxq->rx_used.next;
4052                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
4053
4054                 /* Alloc a new receive buffer */
4055                 rxb->skb =
4056                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4057                 if (!rxb->skb) {
4058                         if (net_ratelimit())
4059                                 printk(KERN_CRIT DRV_NAME
4060                                        ": Can not allocate SKB buffers\n");
4061                         /* We don't reschedule replenish work here -- we will
4062                          * call the restock method and if it still needs
4063                          * more buffers it will schedule replenish */
4064                         break;
4065                 }
4066
4067                 /* If radiotap head is required, reserve some headroom here.
4068                  * The physical head count is a variable rx_stats->phy_count.
4069                  * We reserve 4 bytes here. Plus these extra bytes, the
4070                  * headroom of the physical head should be enough for the
4071                  * radiotap head that iwl3945 supported. See iwl3945_rt.
4072                  */
4073                 skb_reserve(rxb->skb, 4);
4074
4075                 priv->alloc_rxb_skb++;
4076                 list_del(element);
4077
4078                 /* Get physical address of RB/SKB */
4079                 rxb->dma_addr =
4080                     pci_map_single(priv->pci_dev, rxb->skb->data,
4081                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4082                 list_add_tail(&rxb->list, &rxq->rx_free);
4083                 rxq->free_count++;
4084         }
4085         spin_unlock_irqrestore(&rxq->lock, flags);
4086 }
4087
4088 /*
4089  * this should be called while priv->lock is locked
4090  */
4091 static void __iwl3945_rx_replenish(void *data)
4092 {
4093         struct iwl3945_priv *priv = data;
4094
4095         iwl3945_rx_allocate(priv);
4096         iwl3945_rx_queue_restock(priv);
4097 }
4098
4099
4100 void iwl3945_rx_replenish(void *data)
4101 {
4102         struct iwl3945_priv *priv = data;
4103         unsigned long flags;
4104
4105         iwl3945_rx_allocate(priv);
4106
4107         spin_lock_irqsave(&priv->lock, flags);
4108         iwl3945_rx_queue_restock(priv);
4109         spin_unlock_irqrestore(&priv->lock, flags);
4110 }
4111
4112 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4113  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4114  * This free routine walks the list of POOL entries and if SKB is set to
4115  * non NULL it is unmapped and freed
4116  */
4117 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4118 {
4119         int i;
4120         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4121                 if (rxq->pool[i].skb != NULL) {
4122                         pci_unmap_single(priv->pci_dev,
4123                                          rxq->pool[i].dma_addr,
4124                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4125                         dev_kfree_skb(rxq->pool[i].skb);
4126                 }
4127         }
4128
4129         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4130                             rxq->dma_addr);
4131         rxq->bd = NULL;
4132 }
4133
4134 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
4135 {
4136         struct iwl3945_rx_queue *rxq = &priv->rxq;
4137         struct pci_dev *dev = priv->pci_dev;
4138         int i;
4139
4140         spin_lock_init(&rxq->lock);
4141         INIT_LIST_HEAD(&rxq->rx_free);
4142         INIT_LIST_HEAD(&rxq->rx_used);
4143
4144         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4145         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4146         if (!rxq->bd)
4147                 return -ENOMEM;
4148
4149         /* Fill the rx_used queue with _all_ of the Rx buffers */
4150         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4151                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4152
4153         /* Set us so that we have processed and used all buffers, but have
4154          * not restocked the Rx queue with fresh buffers */
4155         rxq->read = rxq->write = 0;
4156         rxq->free_count = 0;
4157         rxq->need_update = 0;
4158         return 0;
4159 }
4160
4161 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
4162 {
4163         unsigned long flags;
4164         int i;
4165         spin_lock_irqsave(&rxq->lock, flags);
4166         INIT_LIST_HEAD(&rxq->rx_free);
4167         INIT_LIST_HEAD(&rxq->rx_used);
4168         /* Fill the rx_used queue with _all_ of the Rx buffers */
4169         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4170                 /* In the reset function, these buffers may have been allocated
4171                  * to an SKB, so we need to unmap and free potential storage */
4172                 if (rxq->pool[i].skb != NULL) {
4173                         pci_unmap_single(priv->pci_dev,
4174                                          rxq->pool[i].dma_addr,
4175                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4176                         priv->alloc_rxb_skb--;
4177                         dev_kfree_skb(rxq->pool[i].skb);
4178                         rxq->pool[i].skb = NULL;
4179                 }
4180                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4181         }
4182
4183         /* Set us so that we have processed and used all buffers, but have
4184          * not restocked the Rx queue with fresh buffers */
4185         rxq->read = rxq->write = 0;
4186         rxq->free_count = 0;
4187         spin_unlock_irqrestore(&rxq->lock, flags);
4188 }
4189
4190 /* Convert linear signal-to-noise ratio into dB */
4191 static u8 ratio2dB[100] = {
4192 /*       0   1   2   3   4   5   6   7   8   9 */
4193          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4194         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4195         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4196         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4197         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4198         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4199         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4200         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4201         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4202         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4203 };
4204
4205 /* Calculates a relative dB value from a ratio of linear
4206  *   (i.e. not dB) signal levels.
4207  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4208 int iwl3945_calc_db_from_ratio(int sig_ratio)
4209 {
4210         /* 1000:1 or higher just report as 60 dB */
4211         if (sig_ratio >= 1000)
4212                 return 60;
4213
4214         /* 100:1 or higher, divide by 10 and use table,
4215          *   add 20 dB to make up for divide by 10 */
4216         if (sig_ratio >= 100)
4217                 return (20 + (int)ratio2dB[sig_ratio/10]);
4218
4219         /* We shouldn't see this */
4220         if (sig_ratio < 1)
4221                 return 0;
4222
4223         /* Use table for ratios 1:1 - 99:1 */
4224         return (int)ratio2dB[sig_ratio];
4225 }
4226
4227 #define PERFECT_RSSI (-20) /* dBm */
4228 #define WORST_RSSI (-95)   /* dBm */
4229 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4230
4231 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4232  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4233  *   about formulas used below. */
4234 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
4235 {
4236         int sig_qual;
4237         int degradation = PERFECT_RSSI - rssi_dbm;
4238
4239         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4240          * as indicator; formula is (signal dbm - noise dbm).
4241          * SNR at or above 40 is a great signal (100%).
4242          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4243          * Weakest usable signal is usually 10 - 15 dB SNR. */
4244         if (noise_dbm) {
4245                 if (rssi_dbm - noise_dbm >= 40)
4246                         return 100;
4247                 else if (rssi_dbm < noise_dbm)
4248                         return 0;
4249                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4250
4251         /* Else use just the signal level.
4252          * This formula is a least squares fit of data points collected and
4253          *   compared with a reference system that had a percentage (%) display
4254          *   for signal quality. */
4255         } else
4256                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4257                             (15 * RSSI_RANGE + 62 * degradation)) /
4258                            (RSSI_RANGE * RSSI_RANGE);
4259
4260         if (sig_qual > 100)
4261                 sig_qual = 100;
4262         else if (sig_qual < 1)
4263                 sig_qual = 0;
4264
4265         return sig_qual;
4266 }
4267
4268 /**
4269  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
4270  *
4271  * Uses the priv->rx_handlers callback function array to invoke
4272  * the appropriate handlers, including command responses,
4273  * frame-received notifications, and other notifications.
4274  */
4275 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
4276 {
4277         struct iwl3945_rx_mem_buffer *rxb;
4278         struct iwl3945_rx_packet *pkt;
4279         struct iwl3945_rx_queue *rxq = &priv->rxq;
4280         u32 r, i;
4281         int reclaim;
4282         unsigned long flags;
4283         u8 fill_rx = 0;
4284         u32 count = 0;
4285
4286         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4287          * buffer that the driver may process (last buffer filled by ucode). */
4288         r = iwl3945_hw_get_rx_read(priv);
4289         i = rxq->read;
4290
4291         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4292                 fill_rx = 1;
4293         /* Rx interrupt, but nothing sent from uCode */
4294         if (i == r)
4295                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4296
4297         while (i != r) {
4298                 rxb = rxq->queue[i];
4299
4300                 /* If an RXB doesn't have a Rx queue slot associated with it,
4301                  * then a bug has been introduced in the queue refilling
4302                  * routines -- catch it here */
4303                 BUG_ON(rxb == NULL);
4304
4305                 rxq->queue[i] = NULL;
4306
4307                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4308                                             IWL_RX_BUF_SIZE,
4309                                             PCI_DMA_FROMDEVICE);
4310                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
4311
4312                 /* Reclaim a command buffer only if this packet is a response
4313                  *   to a (driver-originated) command.
4314                  * If the packet (e.g. Rx frame) originated from uCode,
4315                  *   there is no command buffer to reclaim.
4316                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4317                  *   but apparently a few don't get set; catch them here. */
4318                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4319                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4320                         (pkt->hdr.cmd != REPLY_TX);
4321
4322                 /* Based on type of command response or notification,
4323                  *   handle those that need handling via function in
4324                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
4325                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4326                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4327                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4328                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4329                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4330                 } else {
4331                         /* No handling needed */
4332                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4333                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4334                                 r, i, get_cmd_string(pkt->hdr.cmd),
4335                                 pkt->hdr.cmd);
4336                 }
4337
4338                 if (reclaim) {
4339                         /* Invoke any callbacks, transfer the skb to caller, and
4340                          * fire off the (possibly) blocking iwl3945_send_cmd()
4341                          * as we reclaim the driver command queue */
4342                         if (rxb && rxb->skb)
4343                                 iwl3945_tx_cmd_complete(priv, rxb);
4344                         else
4345                                 IWL_WARNING("Claim null rxb?\n");
4346                 }
4347
4348                 /* For now we just don't re-use anything.  We can tweak this
4349                  * later to try and re-use notification packets and SKBs that
4350                  * fail to Rx correctly */
4351                 if (rxb->skb != NULL) {
4352                         priv->alloc_rxb_skb--;
4353                         dev_kfree_skb_any(rxb->skb);
4354                         rxb->skb = NULL;
4355                 }
4356
4357                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4358                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4359                 spin_lock_irqsave(&rxq->lock, flags);
4360                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4361                 spin_unlock_irqrestore(&rxq->lock, flags);
4362                 i = (i + 1) & RX_QUEUE_MASK;
4363                 /* If there are a lot of unused frames,
4364                  * restock the Rx queue so ucode won't assert. */
4365                 if (fill_rx) {
4366                         count++;
4367                         if (count >= 8) {
4368                                 priv->rxq.read = i;
4369                                 __iwl3945_rx_replenish(priv);
4370                                 count = 0;
4371                         }
4372                 }
4373         }
4374
4375         /* Backtrack one entry */
4376         priv->rxq.read = i;
4377         iwl3945_rx_queue_restock(priv);
4378 }
4379
4380 /**
4381  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
4382  */
4383 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
4384                                   struct iwl3945_tx_queue *txq)
4385 {
4386         u32 reg = 0;
4387         int rc = 0;
4388         int txq_id = txq->q.id;
4389
4390         if (txq->need_update == 0)
4391                 return rc;
4392
4393         /* if we're trying to save power */
4394         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4395                 /* wake up nic if it's powered down ...
4396                  * uCode will wake up, and interrupt us again, so next
4397                  * time we'll skip this part. */
4398                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
4399
4400                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4401                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4402                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
4403                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4404                         return rc;
4405                 }
4406
4407                 /* restore this queue's parameters in nic hardware. */
4408                 rc = iwl3945_grab_nic_access(priv);
4409                 if (rc)
4410                         return rc;
4411                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
4412                                      txq->q.write_ptr | (txq_id << 8));
4413                 iwl3945_release_nic_access(priv);
4414
4415         /* else not in power-save mode, uCode will never sleep when we're
4416          * trying to tx (during RFKILL, we're not trying to tx). */
4417         } else
4418                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
4419                             txq->q.write_ptr | (txq_id << 8));
4420
4421         txq->need_update = 0;
4422
4423         return rc;
4424 }
4425
4426 #ifdef CONFIG_IWL3945_DEBUG
4427 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
4428 {
4429         DECLARE_MAC_BUF(mac);
4430
4431         IWL_DEBUG_RADIO("RX CONFIG:\n");
4432         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4433         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4434         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4435         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4436                         le32_to_cpu(rxon->filter_flags));
4437         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4438         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4439                         rxon->ofdm_basic_rates);
4440         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4441         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4442                         print_mac(mac, rxon->node_addr));
4443         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4444                         print_mac(mac, rxon->bssid_addr));
4445         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4446 }
4447 #endif
4448
4449 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
4450 {
4451         IWL_DEBUG_ISR("Enabling interrupts\n");
4452         set_bit(STATUS_INT_ENABLED, &priv->status);
4453         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4454 }
4455
4456 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
4457 {
4458         clear_bit(STATUS_INT_ENABLED, &priv->status);
4459
4460         /* disable interrupts from uCode/NIC to host */
4461         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4462
4463         /* acknowledge/clear/reset any interrupts still pending
4464          * from uCode or flow handler (Rx/Tx DMA) */
4465         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4466         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4467         IWL_DEBUG_ISR("Disabled interrupts\n");
4468 }
4469
4470 static const char *desc_lookup(int i)
4471 {
4472         switch (i) {
4473         case 1:
4474                 return "FAIL";
4475         case 2:
4476                 return "BAD_PARAM";
4477         case 3:
4478                 return "BAD_CHECKSUM";
4479         case 4:
4480                 return "NMI_INTERRUPT";
4481         case 5:
4482                 return "SYSASSERT";
4483         case 6:
4484                 return "FATAL_ERROR";
4485         }
4486
4487         return "UNKNOWN";
4488 }
4489
4490 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4491 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4492
4493 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4494 {
4495         u32 i;
4496         u32 desc, time, count, base, data1;
4497         u32 blink1, blink2, ilink1, ilink2;
4498         int rc;
4499
4500         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4501
4502         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4503                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4504                 return;
4505         }
4506
4507         rc = iwl3945_grab_nic_access(priv);
4508         if (rc) {
4509                 IWL_WARNING("Can not read from adapter at this time.\n");
4510                 return;
4511         }
4512
4513         count = iwl3945_read_targ_mem(priv, base);
4514
4515         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4516                 IWL_ERROR("Start IWL Error Log Dump:\n");
4517                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4518                           priv->status, priv->config, count);
4519         }
4520
4521         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4522                   "ilink1  nmiPC   Line\n");
4523         for (i = ERROR_START_OFFSET;
4524              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4525              i += ERROR_ELEM_SIZE) {
4526                 desc = iwl3945_read_targ_mem(priv, base + i);
4527                 time =
4528                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4529                 blink1 =
4530                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4531                 blink2 =
4532                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4533                 ilink1 =
4534                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4535                 ilink2 =
4536                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4537                 data1 =
4538                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4539
4540                 IWL_ERROR
4541                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4542                      desc_lookup(desc), desc, time, blink1, blink2,
4543                      ilink1, ilink2, data1);
4544         }
4545
4546         iwl3945_release_nic_access(priv);
4547
4548 }
4549
4550 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4551
4552 /**
4553  * iwl3945_print_event_log - Dump error event log to syslog
4554  *
4555  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4556  */
4557 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4558                                 u32 num_events, u32 mode)
4559 {
4560         u32 i;
4561         u32 base;       /* SRAM byte address of event log header */
4562         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4563         u32 ptr;        /* SRAM byte address of log data */
4564         u32 ev, time, data; /* event log data */
4565
4566         if (num_events == 0)
4567                 return;
4568
4569         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4570
4571         if (mode == 0)
4572                 event_size = 2 * sizeof(u32);
4573         else
4574                 event_size = 3 * sizeof(u32);
4575
4576         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4577
4578         /* "time" is actually "data" for mode 0 (no timestamp).
4579          * place event id # at far right for easier visual parsing. */
4580         for (i = 0; i < num_events; i++) {
4581                 ev = iwl3945_read_targ_mem(priv, ptr);
4582                 ptr += sizeof(u32);
4583                 time = iwl3945_read_targ_mem(priv, ptr);
4584                 ptr += sizeof(u32);
4585                 if (mode == 0)
4586                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4587                 else {
4588                         data = iwl3945_read_targ_mem(priv, ptr);
4589                         ptr += sizeof(u32);
4590                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4591                 }
4592         }
4593 }
4594
4595 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4596 {
4597         int rc;
4598         u32 base;       /* SRAM byte address of event log header */
4599         u32 capacity;   /* event log capacity in # entries */
4600         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4601         u32 num_wraps;  /* # times uCode wrapped to top of log */
4602         u32 next_entry; /* index of next entry to be written by uCode */
4603         u32 size;       /* # entries that we'll print */
4604
4605         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4606         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4607                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4608                 return;
4609         }
4610
4611         rc = iwl3945_grab_nic_access(priv);
4612         if (rc) {
4613                 IWL_WARNING("Can not read from adapter at this time.\n");
4614                 return;
4615         }
4616
4617         /* event log header */
4618         capacity = iwl3945_read_targ_mem(priv, base);
4619         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4620         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4621         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4622
4623         size = num_wraps ? capacity : next_entry;
4624
4625         /* bail out if nothing in log */
4626         if (size == 0) {
4627                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4628                 iwl3945_release_nic_access(priv);
4629                 return;
4630         }
4631
4632         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4633                   size, num_wraps);
4634
4635         /* if uCode has wrapped back to top of log, start at the oldest entry,
4636          * i.e the next one that uCode would fill. */
4637         if (num_wraps)
4638                 iwl3945_print_event_log(priv, next_entry,
4639                                     capacity - next_entry, mode);
4640
4641         /* (then/else) start at top of log */
4642         iwl3945_print_event_log(priv, 0, next_entry, mode);
4643
4644         iwl3945_release_nic_access(priv);
4645 }
4646
4647 /**
4648  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4649  */
4650 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4651 {
4652         /* Set the FW error flag -- cleared on iwl3945_down */
4653         set_bit(STATUS_FW_ERROR, &priv->status);
4654
4655         /* Cancel currently queued command. */
4656         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4657
4658 #ifdef CONFIG_IWL3945_DEBUG
4659         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4660                 iwl3945_dump_nic_error_log(priv);
4661                 iwl3945_dump_nic_event_log(priv);
4662                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4663         }
4664 #endif
4665
4666         wake_up_interruptible(&priv->wait_command_queue);
4667
4668         /* Keep the restart process from trying to send host
4669          * commands by clearing the INIT status bit */
4670         clear_bit(STATUS_READY, &priv->status);
4671
4672         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4673                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4674                           "Restarting adapter due to uCode error.\n");
4675
4676                 if (iwl3945_is_associated(priv)) {
4677                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4678                                sizeof(priv->recovery_rxon));
4679                         priv->error_recovering = 1;
4680                 }
4681                 queue_work(priv->workqueue, &priv->restart);
4682         }
4683 }
4684
4685 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4686 {
4687         unsigned long flags;
4688
4689         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4690                sizeof(priv->staging_rxon));
4691         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4692         iwl3945_commit_rxon(priv);
4693
4694         iwl3945_add_station(priv, priv->bssid, 1, 0);
4695
4696         spin_lock_irqsave(&priv->lock, flags);
4697         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4698         priv->error_recovering = 0;
4699         spin_unlock_irqrestore(&priv->lock, flags);
4700 }
4701
4702 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4703 {
4704         u32 inta, handled = 0;
4705         u32 inta_fh;
4706         unsigned long flags;
4707 #ifdef CONFIG_IWL3945_DEBUG
4708         u32 inta_mask;
4709 #endif
4710
4711         spin_lock_irqsave(&priv->lock, flags);
4712
4713         /* Ack/clear/reset pending uCode interrupts.
4714          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4715          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4716         inta = iwl3945_read32(priv, CSR_INT);
4717         iwl3945_write32(priv, CSR_INT, inta);
4718
4719         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4720          * Any new interrupts that happen after this, either while we're
4721          * in this tasklet, or later, will show up in next ISR/tasklet. */
4722         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4723         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4724
4725 #ifdef CONFIG_IWL3945_DEBUG
4726         if (iwl3945_debug_level & IWL_DL_ISR) {
4727                 /* just for debug */
4728                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4729                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4730                               inta, inta_mask, inta_fh);
4731         }
4732 #endif
4733
4734         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4735          * atomic, make sure that inta covers all the interrupts that
4736          * we've discovered, even if FH interrupt came in just after
4737          * reading CSR_INT. */
4738         if (inta_fh & CSR_FH_INT_RX_MASK)
4739                 inta |= CSR_INT_BIT_FH_RX;
4740         if (inta_fh & CSR_FH_INT_TX_MASK)
4741                 inta |= CSR_INT_BIT_FH_TX;
4742
4743         /* Now service all interrupt bits discovered above. */
4744         if (inta & CSR_INT_BIT_HW_ERR) {
4745                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4746
4747                 /* Tell the device to stop sending interrupts */
4748                 iwl3945_disable_interrupts(priv);
4749
4750                 iwl3945_irq_handle_error(priv);
4751
4752                 handled |= CSR_INT_BIT_HW_ERR;
4753
4754                 spin_unlock_irqrestore(&priv->lock, flags);
4755
4756                 return;
4757         }
4758
4759 #ifdef CONFIG_IWL3945_DEBUG
4760         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4761                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4762                 if (inta & CSR_INT_BIT_SCD)
4763                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4764                                       "the frame/frames.\n");
4765
4766                 /* Alive notification via Rx interrupt will do the real work */
4767                 if (inta & CSR_INT_BIT_ALIVE)
4768                         IWL_DEBUG_ISR("Alive interrupt\n");
4769         }
4770 #endif
4771         /* Safely ignore these bits for debug checks below */
4772         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4773
4774         /* HW RF KILL switch toggled (4965 only) */
4775         if (inta & CSR_INT_BIT_RF_KILL) {
4776                 int hw_rf_kill = 0;
4777                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4778                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4779                         hw_rf_kill = 1;
4780
4781                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4782                                 "RF_KILL bit toggled to %s.\n",
4783                                 hw_rf_kill ? "disable radio":"enable radio");
4784
4785                 /* Queue restart only if RF_KILL switch was set to "kill"
4786                  *   when we loaded driver, and is now set to "enable".
4787                  * After we're Alive, RF_KILL gets handled by
4788                  *   iwl_rx_card_state_notif() */
4789                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4790                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4791                         queue_work(priv->workqueue, &priv->restart);
4792                 }
4793
4794                 handled |= CSR_INT_BIT_RF_KILL;
4795         }
4796
4797         /* Chip got too hot and stopped itself (4965 only) */
4798         if (inta & CSR_INT_BIT_CT_KILL) {
4799                 IWL_ERROR("Microcode CT kill error detected.\n");
4800                 handled |= CSR_INT_BIT_CT_KILL;
4801         }
4802
4803         /* Error detected by uCode */
4804         if (inta & CSR_INT_BIT_SW_ERR) {
4805                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4806                           inta);
4807                 iwl3945_irq_handle_error(priv);
4808                 handled |= CSR_INT_BIT_SW_ERR;
4809         }
4810
4811         /* uCode wakes up after power-down sleep */
4812         if (inta & CSR_INT_BIT_WAKEUP) {
4813                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4814                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4815                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4816                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4817                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4818                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4819                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4820                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4821
4822                 handled |= CSR_INT_BIT_WAKEUP;
4823         }
4824
4825         /* All uCode command responses, including Tx command responses,
4826          * Rx "responses" (frame-received notification), and other
4827          * notifications from uCode come through here*/
4828         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4829                 iwl3945_rx_handle(priv);
4830                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4831         }
4832
4833         if (inta & CSR_INT_BIT_FH_TX) {
4834                 IWL_DEBUG_ISR("Tx interrupt\n");
4835
4836                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4837                 if (!iwl3945_grab_nic_access(priv)) {
4838                         iwl3945_write_direct32(priv,
4839                                              FH_TCSR_CREDIT
4840                                              (ALM_FH_SRVC_CHNL), 0x0);
4841                         iwl3945_release_nic_access(priv);
4842                 }
4843                 handled |= CSR_INT_BIT_FH_TX;
4844         }
4845
4846         if (inta & ~handled)
4847                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4848
4849         if (inta & ~CSR_INI_SET_MASK) {
4850                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4851                          inta & ~CSR_INI_SET_MASK);
4852                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4853         }
4854
4855         /* Re-enable all interrupts */
4856         iwl3945_enable_interrupts(priv);
4857
4858 #ifdef CONFIG_IWL3945_DEBUG
4859         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4860                 inta = iwl3945_read32(priv, CSR_INT);
4861                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4862                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4863                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4864                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4865         }
4866 #endif
4867         spin_unlock_irqrestore(&priv->lock, flags);
4868 }
4869
4870 static irqreturn_t iwl3945_isr(int irq, void *data)
4871 {
4872         struct iwl3945_priv *priv = data;
4873         u32 inta, inta_mask;
4874         u32 inta_fh;
4875         if (!priv)
4876                 return IRQ_NONE;
4877
4878         spin_lock(&priv->lock);
4879
4880         /* Disable (but don't clear!) interrupts here to avoid
4881          *    back-to-back ISRs and sporadic interrupts from our NIC.
4882          * If we have something to service, the tasklet will re-enable ints.
4883          * If we *don't* have something, we'll re-enable before leaving here. */
4884         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4885         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4886
4887         /* Discover which interrupts are active/pending */
4888         inta = iwl3945_read32(priv, CSR_INT);
4889         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4890
4891         /* Ignore interrupt if there's nothing in NIC to service.
4892          * This may be due to IRQ shared with another device,
4893          * or due to sporadic interrupts thrown from our NIC. */
4894         if (!inta && !inta_fh) {
4895                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4896                 goto none;
4897         }
4898
4899         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4900                 /* Hardware disappeared */
4901                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4902                 goto unplugged;
4903         }
4904
4905         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4906                       inta, inta_mask, inta_fh);
4907
4908         inta &= ~CSR_INT_BIT_SCD;
4909
4910         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4911         if (likely(inta || inta_fh))
4912                 tasklet_schedule(&priv->irq_tasklet);
4913 unplugged:
4914         spin_unlock(&priv->lock);
4915
4916         return IRQ_HANDLED;
4917
4918  none:
4919         /* re-enable interrupts here since we don't have anything to service. */
4920         iwl3945_enable_interrupts(priv);
4921         spin_unlock(&priv->lock);
4922         return IRQ_NONE;
4923 }
4924
4925 /************************** EEPROM BANDS ****************************
4926  *
4927  * The iwl3945_eeprom_band definitions below provide the mapping from the
4928  * EEPROM contents to the specific channel number supported for each
4929  * band.
4930  *
4931  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4932  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4933  * The specific geography and calibration information for that channel
4934  * is contained in the eeprom map itself.
4935  *
4936  * During init, we copy the eeprom information and channel map
4937  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4938  *
4939  * channel_map_24/52 provides the index in the channel_info array for a
4940  * given channel.  We have to have two separate maps as there is channel
4941  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4942  * band_2
4943  *
4944  * A value of 0xff stored in the channel_map indicates that the channel
4945  * is not supported by the hardware at all.
4946  *
4947  * A value of 0xfe in the channel_map indicates that the channel is not
4948  * valid for Tx with the current hardware.  This means that
4949  * while the system can tune and receive on a given channel, it may not
4950  * be able to associate or transmit any frames on that
4951  * channel.  There is no corresponding channel information for that
4952  * entry.
4953  *
4954  *********************************************************************/
4955
4956 /* 2.4 GHz */
4957 static const u8 iwl3945_eeprom_band_1[14] = {
4958         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4959 };
4960
4961 /* 5.2 GHz bands */
4962 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4963         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4964 };
4965
4966 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4967         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4968 };
4969
4970 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4971         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4972 };
4973
4974 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4975         145, 149, 153, 157, 161, 165
4976 };
4977
4978 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4979                                     int *eeprom_ch_count,
4980                                     const struct iwl3945_eeprom_channel
4981                                     **eeprom_ch_info,
4982                                     const u8 **eeprom_ch_index)
4983 {
4984         switch (band) {
4985         case 1:         /* 2.4GHz band */
4986                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4987                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4988                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4989                 break;
4990         case 2:         /* 4.9GHz band */
4991                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4992                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4993                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4994                 break;
4995         case 3:         /* 5.2GHz band */
4996                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4997                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4998                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4999                 break;
5000         case 4:         /* 5.5GHz band */
5001                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
5002                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5003                 *eeprom_ch_index = iwl3945_eeprom_band_4;
5004                 break;
5005         case 5:         /* 5.7GHz band */
5006                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
5007                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5008                 *eeprom_ch_index = iwl3945_eeprom_band_5;
5009                 break;
5010         default:
5011                 BUG();
5012                 return;
5013         }
5014 }
5015
5016 /**
5017  * iwl3945_get_channel_info - Find driver's private channel info
5018  *
5019  * Based on band and channel number.
5020  */
5021 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
5022                                                     int phymode, u16 channel)
5023 {
5024         int i;
5025
5026         switch (phymode) {
5027         case MODE_IEEE80211A:
5028                 for (i = 14; i < priv->channel_count; i++) {
5029                         if (priv->channel_info[i].channel == channel)
5030                                 return &priv->channel_info[i];
5031                 }
5032                 break;
5033
5034         case MODE_IEEE80211B:
5035         case MODE_IEEE80211G:
5036                 if (channel >= 1 && channel <= 14)
5037                         return &priv->channel_info[channel - 1];
5038                 break;
5039
5040         }
5041
5042         return NULL;
5043 }
5044
5045 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5046                             ? # x " " : "")
5047
5048 /**
5049  * iwl3945_init_channel_map - Set up driver's info for all possible channels
5050  */
5051 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
5052 {
5053         int eeprom_ch_count = 0;
5054         const u8 *eeprom_ch_index = NULL;
5055         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
5056         int band, ch;
5057         struct iwl3945_channel_info *ch_info;
5058
5059         if (priv->channel_count) {
5060                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5061                 return 0;
5062         }
5063
5064         if (priv->eeprom.version < 0x2f) {
5065                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5066                             priv->eeprom.version);
5067                 return -EINVAL;
5068         }
5069
5070         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5071
5072         priv->channel_count =
5073             ARRAY_SIZE(iwl3945_eeprom_band_1) +
5074             ARRAY_SIZE(iwl3945_eeprom_band_2) +
5075             ARRAY_SIZE(iwl3945_eeprom_band_3) +
5076             ARRAY_SIZE(iwl3945_eeprom_band_4) +
5077             ARRAY_SIZE(iwl3945_eeprom_band_5);
5078
5079         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5080
5081         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
5082                                      priv->channel_count, GFP_KERNEL);
5083         if (!priv->channel_info) {
5084                 IWL_ERROR("Could not allocate channel_info\n");
5085                 priv->channel_count = 0;
5086                 return -ENOMEM;
5087         }
5088
5089         ch_info = priv->channel_info;
5090
5091         /* Loop through the 5 EEPROM bands adding them in order to the
5092          * channel map we maintain (that contains additional information than
5093          * what just in the EEPROM) */
5094         for (band = 1; band <= 5; band++) {
5095
5096                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
5097                                         &eeprom_ch_info, &eeprom_ch_index);
5098
5099                 /* Loop through each band adding each of the channels */
5100                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5101                         ch_info->channel = eeprom_ch_index[ch];
5102                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5103                             MODE_IEEE80211A;
5104
5105                         /* permanently store EEPROM's channel regulatory flags
5106                          *   and max power in channel info database. */
5107                         ch_info->eeprom = eeprom_ch_info[ch];
5108
5109                         /* Copy the run-time flags so they are there even on
5110                          * invalid channels */
5111                         ch_info->flags = eeprom_ch_info[ch].flags;
5112
5113                         if (!(is_channel_valid(ch_info))) {
5114                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5115                                                "No traffic\n",
5116                                                ch_info->channel,
5117                                                ch_info->flags,
5118                                                is_channel_a_band(ch_info) ?
5119                                                "5.2" : "2.4");
5120                                 ch_info++;
5121                                 continue;
5122                         }
5123
5124                         /* Initialize regulatory-based run-time data */
5125                         ch_info->max_power_avg = ch_info->curr_txpow =
5126                             eeprom_ch_info[ch].max_power_avg;
5127                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5128                         ch_info->min_power = 0;
5129
5130                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5131                                        " %ddBm): Ad-Hoc %ssupported\n",
5132                                        ch_info->channel,
5133                                        is_channel_a_band(ch_info) ?
5134                                        "5.2" : "2.4",
5135                                        CHECK_AND_PRINT(IBSS),
5136                                        CHECK_AND_PRINT(ACTIVE),
5137                                        CHECK_AND_PRINT(RADAR),
5138                                        CHECK_AND_PRINT(WIDE),
5139                                        CHECK_AND_PRINT(NARROW),
5140                                        CHECK_AND_PRINT(DFS),
5141                                        eeprom_ch_info[ch].flags,
5142                                        eeprom_ch_info[ch].max_power_avg,
5143                                        ((eeprom_ch_info[ch].
5144                                          flags & EEPROM_CHANNEL_IBSS)
5145                                         && !(eeprom_ch_info[ch].
5146                                              flags & EEPROM_CHANNEL_RADAR))
5147                                        ? "" : "not ");
5148
5149                         /* Set the user_txpower_limit to the highest power
5150                          * supported by any channel */
5151                         if (eeprom_ch_info[ch].max_power_avg >
5152                             priv->user_txpower_limit)
5153                                 priv->user_txpower_limit =
5154                                     eeprom_ch_info[ch].max_power_avg;
5155
5156                         ch_info++;
5157                 }
5158         }
5159
5160         /* Set up txpower settings in driver for all channels */
5161         if (iwl3945_txpower_set_from_eeprom(priv))
5162                 return -EIO;
5163
5164         return 0;
5165 }
5166
5167 /*
5168  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
5169  */
5170 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
5171 {
5172         kfree(priv->channel_info);
5173         priv->channel_count = 0;
5174 }
5175
5176 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5177  * sending probe req.  This should be set long enough to hear probe responses
5178  * from more than one AP.  */
5179 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5180 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5181
5182 /* For faster active scanning, scan will move to the next channel if fewer than
5183  * PLCP_QUIET_THRESH packets are heard on this channel within
5184  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5185  * time if it's a quiet channel (nothing responded to our probe, and there's
5186  * no other traffic).
5187  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5188 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5189 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5190
5191 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5192  * Must be set longer than active dwell time.
5193  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5194 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5195 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5196 #define IWL_PASSIVE_DWELL_BASE      (100)
5197 #define IWL_CHANNEL_TUNE_TIME       5
5198
5199 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv, int phymode)
5200 {
5201         if (phymode == MODE_IEEE80211A)
5202                 return IWL_ACTIVE_DWELL_TIME_52;
5203         else
5204                 return IWL_ACTIVE_DWELL_TIME_24;
5205 }
5206
5207 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv, int phymode)
5208 {
5209         u16 active = iwl3945_get_active_dwell_time(priv, phymode);
5210         u16 passive = (phymode != MODE_IEEE80211A) ?
5211             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5212             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5213
5214         if (iwl3945_is_associated(priv)) {
5215                 /* If we're associated, we clamp the maximum passive
5216                  * dwell time to be 98% of the beacon interval (minus
5217                  * 2 * channel tune time) */
5218                 passive = priv->beacon_int;
5219                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5220                         passive = IWL_PASSIVE_DWELL_BASE;
5221                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5222         }
5223
5224         if (passive <= active)
5225                 passive = active + 1;
5226
5227         return passive;
5228 }
5229
5230 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv, int phymode,
5231                                      u8 is_active, u8 direct_mask,
5232                                      struct iwl3945_scan_channel *scan_ch)
5233 {
5234         const struct ieee80211_channel *channels = NULL;
5235         const struct ieee80211_hw_mode *hw_mode;
5236         const struct iwl3945_channel_info *ch_info;
5237         u16 passive_dwell = 0;
5238         u16 active_dwell = 0;
5239         int added, i;
5240
5241         hw_mode = iwl3945_get_hw_mode(priv, phymode);
5242         if (!hw_mode)
5243                 return 0;
5244
5245         channels = hw_mode->channels;
5246
5247         active_dwell = iwl3945_get_active_dwell_time(priv, phymode);
5248         passive_dwell = iwl3945_get_passive_dwell_time(priv, phymode);
5249
5250         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5251                 if (channels[i].chan ==
5252                     le16_to_cpu(priv->active_rxon.channel)) {
5253                         if (iwl3945_is_associated(priv)) {
5254                                 IWL_DEBUG_SCAN
5255                                     ("Skipping current channel %d\n",
5256                                      le16_to_cpu(priv->active_rxon.channel));
5257                                 continue;
5258                         }
5259                 } else if (priv->only_active_channel)
5260                         continue;
5261
5262                 scan_ch->channel = channels[i].chan;
5263
5264                 ch_info = iwl3945_get_channel_info(priv, phymode, scan_ch->channel);
5265                 if (!is_channel_valid(ch_info)) {
5266                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5267                                        scan_ch->channel);
5268                         continue;
5269                 }
5270
5271                 if (!is_active || is_channel_passive(ch_info) ||
5272                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5273                         scan_ch->type = 0;      /* passive */
5274                 else
5275                         scan_ch->type = 1;      /* active */
5276
5277                 if (scan_ch->type & 1)
5278                         scan_ch->type |= (direct_mask << 1);
5279
5280                 if (is_channel_narrow(ch_info))
5281                         scan_ch->type |= (1 << 7);
5282
5283                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5284                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5285
5286                 /* Set txpower levels to defaults */
5287                 scan_ch->tpc.dsp_atten = 110;
5288                 /* scan_pwr_info->tpc.dsp_atten; */
5289
5290                 /*scan_pwr_info->tpc.tx_gain; */
5291                 if (phymode == MODE_IEEE80211A)
5292                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5293                 else {
5294                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5295                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5296                          * power level:
5297                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5298                          */
5299                 }
5300
5301                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5302                                scan_ch->channel,
5303                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5304                                (scan_ch->type & 1) ?
5305                                active_dwell : passive_dwell);
5306
5307                 scan_ch++;
5308                 added++;
5309         }
5310
5311         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5312         return added;
5313 }
5314
5315 static void iwl3945_reset_channel_flag(struct iwl3945_priv *priv)
5316 {
5317         int i, j;
5318         for (i = 0; i < 3; i++) {
5319                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5320                 for (j = 0; j < hw_mode->num_channels; j++)
5321                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5322         }
5323 }
5324
5325 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
5326                               struct ieee80211_rate *rates)
5327 {
5328         int i;
5329
5330         for (i = 0; i < IWL_RATE_COUNT; i++) {
5331                 rates[i].rate = iwl3945_rates[i].ieee * 5;
5332                 rates[i].val = i; /* Rate scaling will work on indexes */
5333                 rates[i].val2 = i;
5334                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5335                 /* Only OFDM have the bits-per-symbol set */
5336                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5337                         rates[i].flags |= IEEE80211_RATE_OFDM;
5338                 else {
5339                         /*
5340                          * If CCK 1M then set rate flag to CCK else CCK_2
5341                          * which is CCK | PREAMBLE2
5342                          */
5343                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
5344                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5345                 }
5346
5347                 /* Set up which ones are basic rates... */
5348                 if (IWL_BASIC_RATES_MASK & (1 << i))
5349                         rates[i].flags |= IEEE80211_RATE_BASIC;
5350         }
5351 }
5352
5353 /**
5354  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
5355  */
5356 static int iwl3945_init_geos(struct iwl3945_priv *priv)
5357 {
5358         struct iwl3945_channel_info *ch;
5359         struct ieee80211_hw_mode *modes;
5360         struct ieee80211_channel *channels;
5361         struct ieee80211_channel *geo_ch;
5362         struct ieee80211_rate *rates;
5363         int i = 0;
5364         enum {
5365                 A = 0,
5366                 B = 1,
5367                 G = 2,
5368         };
5369         int mode_count = 3;
5370
5371         if (priv->modes) {
5372                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5373                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5374                 return 0;
5375         }
5376
5377         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5378                         GFP_KERNEL);
5379         if (!modes)
5380                 return -ENOMEM;
5381
5382         channels = kzalloc(sizeof(struct ieee80211_channel) *
5383                            priv->channel_count, GFP_KERNEL);
5384         if (!channels) {
5385                 kfree(modes);
5386                 return -ENOMEM;
5387         }
5388
5389         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5390                         GFP_KERNEL);
5391         if (!rates) {
5392                 kfree(modes);
5393                 kfree(channels);
5394                 return -ENOMEM;
5395         }
5396
5397         /* 0 = 802.11a
5398          * 1 = 802.11b
5399          * 2 = 802.11g
5400          */
5401
5402         /* 5.2GHz channels start after the 2.4GHz channels */
5403         modes[A].mode = MODE_IEEE80211A;
5404         modes[A].channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
5405         modes[A].rates = &rates[4];
5406         modes[A].num_rates = 8; /* just OFDM */
5407         modes[A].num_channels = 0;
5408
5409         modes[B].mode = MODE_IEEE80211B;
5410         modes[B].channels = channels;
5411         modes[B].rates = rates;
5412         modes[B].num_rates = 4; /* just CCK */
5413         modes[B].num_channels = 0;
5414
5415         modes[G].mode = MODE_IEEE80211G;
5416         modes[G].channels = channels;
5417         modes[G].rates = rates;
5418         modes[G].num_rates = 12;        /* OFDM & CCK */
5419         modes[G].num_channels = 0;
5420
5421         priv->ieee_channels = channels;
5422         priv->ieee_rates = rates;
5423
5424         iwl3945_init_hw_rates(priv, rates);
5425
5426         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5427                 ch = &priv->channel_info[i];
5428
5429                 if (!is_channel_valid(ch)) {
5430                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5431                                     "skipping.\n",
5432                                     ch->channel, is_channel_a_band(ch) ?
5433                                     "5.2" : "2.4");
5434                         continue;
5435                 }
5436
5437                 if (is_channel_a_band(ch))
5438                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5439                 else {
5440                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5441                         modes[G].num_channels++;
5442                 }
5443
5444                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5445                 geo_ch->chan = ch->channel;
5446                 geo_ch->power_level = ch->max_power_avg;
5447                 geo_ch->antenna_max = 0xff;
5448
5449                 if (is_channel_valid(ch)) {
5450                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5451                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5452                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5453
5454                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5455                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5456
5457                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5458                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5459
5460                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5461                                 priv->max_channel_txpower_limit =
5462                                     ch->max_power_avg;
5463                 }
5464
5465                 geo_ch->val = geo_ch->flag;
5466         }
5467
5468         if ((modes[A].num_channels == 0) && priv->is_abg) {
5469                 printk(KERN_INFO DRV_NAME
5470                        ": Incorrectly detected BG card as ABG.  Please send "
5471                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5472                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5473                 priv->is_abg = 0;
5474         }
5475
5476         printk(KERN_INFO DRV_NAME
5477                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5478                modes[G].num_channels, modes[A].num_channels);
5479
5480         /*
5481          * NOTE:  We register these in preference of order -- the
5482          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5483          * a phymode based on rates or AP capabilities but seems to
5484          * configure it purely on if the channel being configured
5485          * is supported by a mode -- and the first match is taken
5486          */
5487
5488         if (modes[G].num_channels)
5489                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5490         if (modes[B].num_channels)
5491                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5492         if (modes[A].num_channels)
5493                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5494
5495         priv->modes = modes;
5496         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5497
5498         return 0;
5499 }
5500
5501 /*
5502  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5503  */
5504 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5505 {
5506         kfree(priv->modes);
5507         kfree(priv->ieee_channels);
5508         kfree(priv->ieee_rates);
5509         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5510 }
5511
5512 /******************************************************************************
5513  *
5514  * uCode download functions
5515  *
5516  ******************************************************************************/
5517
5518 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5519 {
5520         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5521         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5522         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5523         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5524         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5525         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5526 }
5527
5528 /**
5529  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5530  *     looking at all data.
5531  */
5532 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 * image, u32 len)
5533 {
5534         u32 val;
5535         u32 save_len = len;
5536         int rc = 0;
5537         u32 errcnt;
5538
5539         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5540
5541         rc = iwl3945_grab_nic_access(priv);
5542         if (rc)
5543                 return rc;
5544
5545         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5546
5547         errcnt = 0;
5548         for (; len > 0; len -= sizeof(u32), image++) {
5549                 /* read data comes through single port, auto-incr addr */
5550                 /* NOTE: Use the debugless read so we don't flood kernel log
5551                  * if IWL_DL_IO is set */
5552                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5553                 if (val != le32_to_cpu(*image)) {
5554                         IWL_ERROR("uCode INST section is invalid at "
5555                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5556                                   save_len - len, val, le32_to_cpu(*image));
5557                         rc = -EIO;
5558                         errcnt++;
5559                         if (errcnt >= 20)
5560                                 break;
5561                 }
5562         }
5563
5564         iwl3945_release_nic_access(priv);
5565
5566         if (!errcnt)
5567                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5568
5569         return rc;
5570 }
5571
5572
5573 /**
5574  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5575  *   using sample data 100 bytes apart.  If these sample points are good,
5576  *   it's a pretty good bet that everything between them is good, too.
5577  */
5578 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5579 {
5580         u32 val;
5581         int rc = 0;
5582         u32 errcnt = 0;
5583         u32 i;
5584
5585         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5586
5587         rc = iwl3945_grab_nic_access(priv);
5588         if (rc)
5589                 return rc;
5590
5591         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5592                 /* read data comes through single port, auto-incr addr */
5593                 /* NOTE: Use the debugless read so we don't flood kernel log
5594                  * if IWL_DL_IO is set */
5595                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5596                         i + RTC_INST_LOWER_BOUND);
5597                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5598                 if (val != le32_to_cpu(*image)) {
5599 #if 0 /* Enable this if you want to see details */
5600                         IWL_ERROR("uCode INST section is invalid at "
5601                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5602                                   i, val, *image);
5603 #endif
5604                         rc = -EIO;
5605                         errcnt++;
5606                         if (errcnt >= 3)
5607                                 break;
5608                 }
5609         }
5610
5611         iwl3945_release_nic_access(priv);
5612
5613         return rc;
5614 }
5615
5616
5617 /**
5618  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5619  *    and verify its contents
5620  */
5621 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5622 {
5623         __le32 *image;
5624         u32 len;
5625         int rc = 0;
5626
5627         /* Try bootstrap */
5628         image = (__le32 *)priv->ucode_boot.v_addr;
5629         len = priv->ucode_boot.len;
5630         rc = iwl3945_verify_inst_sparse(priv, image, len);
5631         if (rc == 0) {
5632                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5633                 return 0;
5634         }
5635
5636         /* Try initialize */
5637         image = (__le32 *)priv->ucode_init.v_addr;
5638         len = priv->ucode_init.len;
5639         rc = iwl3945_verify_inst_sparse(priv, image, len);
5640         if (rc == 0) {
5641                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5642                 return 0;
5643         }
5644
5645         /* Try runtime/protocol */
5646         image = (__le32 *)priv->ucode_code.v_addr;
5647         len = priv->ucode_code.len;
5648         rc = iwl3945_verify_inst_sparse(priv, image, len);
5649         if (rc == 0) {
5650                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5651                 return 0;
5652         }
5653
5654         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5655
5656         /* Since nothing seems to match, show first several data entries in
5657          * instruction SRAM, so maybe visual inspection will give a clue.
5658          * Selection of bootstrap image (vs. other images) is arbitrary. */
5659         image = (__le32 *)priv->ucode_boot.v_addr;
5660         len = priv->ucode_boot.len;
5661         rc = iwl3945_verify_inst_full(priv, image, len);
5662
5663         return rc;
5664 }
5665
5666
5667 /* check contents of special bootstrap uCode SRAM */
5668 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5669 {
5670         __le32 *image = priv->ucode_boot.v_addr;
5671         u32 len = priv->ucode_boot.len;
5672         u32 reg;
5673         u32 val;
5674
5675         IWL_DEBUG_INFO("Begin verify bsm\n");
5676
5677         /* verify BSM SRAM contents */
5678         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5679         for (reg = BSM_SRAM_LOWER_BOUND;
5680              reg < BSM_SRAM_LOWER_BOUND + len;
5681              reg += sizeof(u32), image ++) {
5682                 val = iwl3945_read_prph(priv, reg);
5683                 if (val != le32_to_cpu(*image)) {
5684                         IWL_ERROR("BSM uCode verification failed at "
5685                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5686                                   BSM_SRAM_LOWER_BOUND,
5687                                   reg - BSM_SRAM_LOWER_BOUND, len,
5688                                   val, le32_to_cpu(*image));
5689                         return -EIO;
5690                 }
5691         }
5692
5693         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5694
5695         return 0;
5696 }
5697
5698 /**
5699  * iwl3945_load_bsm - Load bootstrap instructions
5700  *
5701  * BSM operation:
5702  *
5703  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5704  * in special SRAM that does not power down during RFKILL.  When powering back
5705  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5706  * the bootstrap program into the on-board processor, and starts it.
5707  *
5708  * The bootstrap program loads (via DMA) instructions and data for a new
5709  * program from host DRAM locations indicated by the host driver in the
5710  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5711  * automatically.
5712  *
5713  * When initializing the NIC, the host driver points the BSM to the
5714  * "initialize" uCode image.  This uCode sets up some internal data, then
5715  * notifies host via "initialize alive" that it is complete.
5716  *
5717  * The host then replaces the BSM_DRAM_* pointer values to point to the
5718  * normal runtime uCode instructions and a backup uCode data cache buffer
5719  * (filled initially with starting data values for the on-board processor),
5720  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5721  * which begins normal operation.
5722  *
5723  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5724  * the backup data cache in DRAM before SRAM is powered down.
5725  *
5726  * When powering back up, the BSM loads the bootstrap program.  This reloads
5727  * the runtime uCode instructions and the backup data cache into SRAM,
5728  * and re-launches the runtime uCode from where it left off.
5729  */
5730 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5731 {
5732         __le32 *image = priv->ucode_boot.v_addr;
5733         u32 len = priv->ucode_boot.len;
5734         dma_addr_t pinst;
5735         dma_addr_t pdata;
5736         u32 inst_len;
5737         u32 data_len;
5738         int rc;
5739         int i;
5740         u32 done;
5741         u32 reg_offset;
5742
5743         IWL_DEBUG_INFO("Begin load bsm\n");
5744
5745         /* make sure bootstrap program is no larger than BSM's SRAM size */
5746         if (len > IWL_MAX_BSM_SIZE)
5747                 return -EINVAL;
5748
5749         /* Tell bootstrap uCode where to find the "Initialize" uCode
5750          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5751          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5752          *        after the "initialize" uCode has run, to point to
5753          *        runtime/protocol instructions and backup data cache. */
5754         pinst = priv->ucode_init.p_addr;
5755         pdata = priv->ucode_init_data.p_addr;
5756         inst_len = priv->ucode_init.len;
5757         data_len = priv->ucode_init_data.len;
5758
5759         rc = iwl3945_grab_nic_access(priv);
5760         if (rc)
5761                 return rc;
5762
5763         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5764         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5765         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5766         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5767
5768         /* Fill BSM memory with bootstrap instructions */
5769         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5770              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5771              reg_offset += sizeof(u32), image++)
5772                 _iwl3945_write_prph(priv, reg_offset,
5773                                           le32_to_cpu(*image));
5774
5775         rc = iwl3945_verify_bsm(priv);
5776         if (rc) {
5777                 iwl3945_release_nic_access(priv);
5778                 return rc;
5779         }
5780
5781         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5782         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5783         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5784                                  RTC_INST_LOWER_BOUND);
5785         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5786
5787         /* Load bootstrap code into instruction SRAM now,
5788          *   to prepare to load "initialize" uCode */
5789         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5790                 BSM_WR_CTRL_REG_BIT_START);
5791
5792         /* Wait for load of bootstrap uCode to finish */
5793         for (i = 0; i < 100; i++) {
5794                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5795                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5796                         break;
5797                 udelay(10);
5798         }
5799         if (i < 100)
5800                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5801         else {
5802                 IWL_ERROR("BSM write did not complete!\n");
5803                 return -EIO;
5804         }
5805
5806         /* Enable future boot loads whenever power management unit triggers it
5807          *   (e.g. when powering back up after power-save shutdown) */
5808         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5809                 BSM_WR_CTRL_REG_BIT_START_EN);
5810
5811         iwl3945_release_nic_access(priv);
5812
5813         return 0;
5814 }
5815
5816 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5817 {
5818         /* Remove all resets to allow NIC to operate */
5819         iwl3945_write32(priv, CSR_RESET, 0);
5820 }
5821
5822 /**
5823  * iwl3945_read_ucode - Read uCode images from disk file.
5824  *
5825  * Copy into buffers for card to fetch via bus-mastering
5826  */
5827 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5828 {
5829         struct iwl3945_ucode *ucode;
5830         int ret = 0;
5831         const struct firmware *ucode_raw;
5832         /* firmware file name contains uCode/driver compatibility version */
5833         const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5834         u8 *src;
5835         size_t len;
5836         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5837
5838         /* Ask kernel firmware_class module to get the boot firmware off disk.
5839          * request_firmware() is synchronous, file is in memory on return. */
5840         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5841         if (ret < 0) {
5842                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5843                                 name, ret);
5844                 goto error;
5845         }
5846
5847         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5848                        name, ucode_raw->size);
5849
5850         /* Make sure that we got at least our header! */
5851         if (ucode_raw->size < sizeof(*ucode)) {
5852                 IWL_ERROR("File size way too small!\n");
5853                 ret = -EINVAL;
5854                 goto err_release;
5855         }
5856
5857         /* Data from ucode file:  header followed by uCode images */
5858         ucode = (void *)ucode_raw->data;
5859
5860         ver = le32_to_cpu(ucode->ver);
5861         inst_size = le32_to_cpu(ucode->inst_size);
5862         data_size = le32_to_cpu(ucode->data_size);
5863         init_size = le32_to_cpu(ucode->init_size);
5864         init_data_size = le32_to_cpu(ucode->init_data_size);
5865         boot_size = le32_to_cpu(ucode->boot_size);
5866
5867         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5868         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5869         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5870         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5871         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5872         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5873
5874         /* Verify size of file vs. image size info in file's header */
5875         if (ucode_raw->size < sizeof(*ucode) +
5876                 inst_size + data_size + init_size +
5877                 init_data_size + boot_size) {
5878
5879                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5880                                (int)ucode_raw->size);
5881                 ret = -EINVAL;
5882                 goto err_release;
5883         }
5884
5885         /* Verify that uCode images will fit in card's SRAM */
5886         if (inst_size > IWL_MAX_INST_SIZE) {
5887                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5888                                inst_size);
5889                 ret = -EINVAL;
5890                 goto err_release;
5891         }
5892
5893         if (data_size > IWL_MAX_DATA_SIZE) {
5894                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5895                                data_size);
5896                 ret = -EINVAL;
5897                 goto err_release;
5898         }
5899         if (init_size > IWL_MAX_INST_SIZE) {
5900                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5901                                 init_size);
5902                 ret = -EINVAL;
5903                 goto err_release;
5904         }
5905         if (init_data_size > IWL_MAX_DATA_SIZE) {
5906                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5907                                 init_data_size);
5908                 ret = -EINVAL;
5909                 goto err_release;
5910         }
5911         if (boot_size > IWL_MAX_BSM_SIZE) {
5912                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5913                                 boot_size);
5914                 ret = -EINVAL;
5915                 goto err_release;
5916         }
5917
5918         /* Allocate ucode buffers for card's bus-master loading ... */
5919
5920         /* Runtime instructions and 2 copies of data:
5921          * 1) unmodified from disk
5922          * 2) backup cache for save/restore during power-downs */
5923         priv->ucode_code.len = inst_size;
5924         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5925
5926         priv->ucode_data.len = data_size;
5927         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5928
5929         priv->ucode_data_backup.len = data_size;
5930         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5931
5932         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5933             !priv->ucode_data_backup.v_addr)
5934                 goto err_pci_alloc;
5935
5936         /* Initialization instructions and data */
5937         if (init_size && init_data_size) {
5938                 priv->ucode_init.len = init_size;
5939                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5940
5941                 priv->ucode_init_data.len = init_data_size;
5942                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5943
5944                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5945                         goto err_pci_alloc;
5946         }
5947
5948         /* Bootstrap (instructions only, no data) */
5949         if (boot_size) {
5950                 priv->ucode_boot.len = boot_size;
5951                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5952
5953                 if (!priv->ucode_boot.v_addr)
5954                         goto err_pci_alloc;
5955         }
5956
5957         /* Copy images into buffers for card's bus-master reads ... */
5958
5959         /* Runtime instructions (first block of data in file) */
5960         src = &ucode->data[0];
5961         len = priv->ucode_code.len;
5962         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5963         memcpy(priv->ucode_code.v_addr, src, len);
5964         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5965                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5966
5967         /* Runtime data (2nd block)
5968          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5969         src = &ucode->data[inst_size];
5970         len = priv->ucode_data.len;
5971         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5972         memcpy(priv->ucode_data.v_addr, src, len);
5973         memcpy(priv->ucode_data_backup.v_addr, src, len);
5974
5975         /* Initialization instructions (3rd block) */
5976         if (init_size) {
5977                 src = &ucode->data[inst_size + data_size];
5978                 len = priv->ucode_init.len;
5979                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5980                                len);
5981                 memcpy(priv->ucode_init.v_addr, src, len);
5982         }
5983
5984         /* Initialization data (4th block) */
5985         if (init_data_size) {
5986                 src = &ucode->data[inst_size + data_size + init_size];
5987                 len = priv->ucode_init_data.len;
5988                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5989                                (int)len);
5990                 memcpy(priv->ucode_init_data.v_addr, src, len);
5991         }
5992
5993         /* Bootstrap instructions (5th block) */
5994         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5995         len = priv->ucode_boot.len;
5996         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5997                        (int)len);
5998         memcpy(priv->ucode_boot.v_addr, src, len);
5999
6000         /* We have our copies now, allow OS release its copies */
6001         release_firmware(ucode_raw);
6002         return 0;
6003
6004  err_pci_alloc:
6005         IWL_ERROR("failed to allocate pci memory\n");
6006         ret = -ENOMEM;
6007         iwl3945_dealloc_ucode_pci(priv);
6008
6009  err_release:
6010         release_firmware(ucode_raw);
6011
6012  error:
6013         return ret;
6014 }
6015
6016
6017 /**
6018  * iwl3945_set_ucode_ptrs - Set uCode address location
6019  *
6020  * Tell initialization uCode where to find runtime uCode.
6021  *
6022  * BSM registers initially contain pointers to initialization uCode.
6023  * We need to replace them to load runtime uCode inst and data,
6024  * and to save runtime data when powering down.
6025  */
6026 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
6027 {
6028         dma_addr_t pinst;
6029         dma_addr_t pdata;
6030         int rc = 0;
6031         unsigned long flags;
6032
6033         /* bits 31:0 for 3945 */
6034         pinst = priv->ucode_code.p_addr;
6035         pdata = priv->ucode_data_backup.p_addr;
6036
6037         spin_lock_irqsave(&priv->lock, flags);
6038         rc = iwl3945_grab_nic_access(priv);
6039         if (rc) {
6040                 spin_unlock_irqrestore(&priv->lock, flags);
6041                 return rc;
6042         }
6043
6044         /* Tell bootstrap uCode where to find image to load */
6045         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6046         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6047         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6048                                  priv->ucode_data.len);
6049
6050         /* Inst bytecount must be last to set up, bit 31 signals uCode
6051          *   that all new ptr/size info is in place */
6052         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6053                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6054
6055         iwl3945_release_nic_access(priv);
6056
6057         spin_unlock_irqrestore(&priv->lock, flags);
6058
6059         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6060
6061         return rc;
6062 }
6063
6064 /**
6065  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
6066  *
6067  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6068  *
6069  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6070  */
6071 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
6072 {
6073         /* Check alive response for "valid" sign from uCode */
6074         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6075                 /* We had an error bringing up the hardware, so take it
6076                  * all the way back down so we can try again */
6077                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6078                 goto restart;
6079         }
6080
6081         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6082          * This is a paranoid check, because we would not have gotten the
6083          * "initialize" alive if code weren't properly loaded.  */
6084         if (iwl3945_verify_ucode(priv)) {
6085                 /* Runtime instruction load was bad;
6086                  * take it all the way back down so we can try again */
6087                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6088                 goto restart;
6089         }
6090
6091         /* Send pointers to protocol/runtime uCode image ... init code will
6092          * load and launch runtime uCode, which will send us another "Alive"
6093          * notification. */
6094         IWL_DEBUG_INFO("Initialization Alive received.\n");
6095         if (iwl3945_set_ucode_ptrs(priv)) {
6096                 /* Runtime instruction load won't happen;
6097                  * take it all the way back down so we can try again */
6098                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6099                 goto restart;
6100         }
6101         return;
6102
6103  restart:
6104         queue_work(priv->workqueue, &priv->restart);
6105 }
6106
6107
6108 /**
6109  * iwl3945_alive_start - called after REPLY_ALIVE notification received
6110  *                   from protocol/runtime uCode (initialization uCode's
6111  *                   Alive gets handled by iwl3945_init_alive_start()).
6112  */
6113 static void iwl3945_alive_start(struct iwl3945_priv *priv)
6114 {
6115         int rc = 0;
6116         int thermal_spin = 0;
6117         u32 rfkill;
6118
6119         IWL_DEBUG_INFO("Runtime Alive received.\n");
6120
6121         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6122                 /* We had an error bringing up the hardware, so take it
6123                  * all the way back down so we can try again */
6124                 IWL_DEBUG_INFO("Alive failed.\n");
6125                 goto restart;
6126         }
6127
6128         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6129          * This is a paranoid check, because we would not have gotten the
6130          * "runtime" alive if code weren't properly loaded.  */
6131         if (iwl3945_verify_ucode(priv)) {
6132                 /* Runtime instruction load was bad;
6133                  * take it all the way back down so we can try again */
6134                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6135                 goto restart;
6136         }
6137
6138         iwl3945_clear_stations_table(priv);
6139
6140         rc = iwl3945_grab_nic_access(priv);
6141         if (rc) {
6142                 IWL_WARNING("Can not read rfkill status from adapter\n");
6143                 return;
6144         }
6145
6146         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
6147         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6148         iwl3945_release_nic_access(priv);
6149
6150         if (rfkill & 0x1) {
6151                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6152                 /* if rfkill is not on, then wait for thermal
6153                  * sensor in adapter to kick in */
6154                 while (iwl3945_hw_get_temperature(priv) == 0) {
6155                         thermal_spin++;
6156                         udelay(10);
6157                 }
6158
6159                 if (thermal_spin)
6160                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6161                                        thermal_spin * 10);
6162         } else
6163                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6164
6165         /* After the ALIVE response, we can send commands to 3945 uCode */
6166         set_bit(STATUS_ALIVE, &priv->status);
6167
6168         /* Clear out the uCode error bit if it is set */
6169         clear_bit(STATUS_FW_ERROR, &priv->status);
6170
6171         if (iwl3945_is_rfkill(priv))
6172                 return;
6173
6174         ieee80211_start_queues(priv->hw);
6175
6176         priv->active_rate = priv->rates_mask;
6177         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6178
6179         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6180
6181         if (iwl3945_is_associated(priv)) {
6182                 struct iwl3945_rxon_cmd *active_rxon =
6183                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
6184
6185                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6186                        sizeof(priv->staging_rxon));
6187                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6188         } else {
6189                 /* Initialize our rx_config data */
6190                 iwl3945_connection_init_rx_config(priv);
6191                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6192         }
6193
6194         /* Configure Bluetooth device coexistence support */
6195         iwl3945_send_bt_config(priv);
6196
6197         /* Configure the adapter for unassociated operation */
6198         iwl3945_commit_rxon(priv);
6199
6200         /* At this point, the NIC is initialized and operational */
6201         priv->notif_missed_beacons = 0;
6202         set_bit(STATUS_READY, &priv->status);
6203
6204         iwl3945_reg_txpower_periodic(priv);
6205
6206         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6207         wake_up_interruptible(&priv->wait_command_queue);
6208
6209         if (priv->error_recovering)
6210                 iwl3945_error_recovery(priv);
6211
6212         return;
6213
6214  restart:
6215         queue_work(priv->workqueue, &priv->restart);
6216 }
6217
6218 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
6219
6220 static void __iwl3945_down(struct iwl3945_priv *priv)
6221 {
6222         unsigned long flags;
6223         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6224         struct ieee80211_conf *conf = NULL;
6225
6226         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6227
6228         conf = ieee80211_get_hw_conf(priv->hw);
6229
6230         if (!exit_pending)
6231                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6232
6233         iwl3945_clear_stations_table(priv);
6234
6235         /* Unblock any waiting calls */
6236         wake_up_interruptible_all(&priv->wait_command_queue);
6237
6238         /* Wipe out the EXIT_PENDING status bit if we are not actually
6239          * exiting the module */
6240         if (!exit_pending)
6241                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6242
6243         /* stop and reset the on-board processor */
6244         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6245
6246         /* tell the device to stop sending interrupts */
6247         iwl3945_disable_interrupts(priv);
6248
6249         if (priv->mac80211_registered)
6250                 ieee80211_stop_queues(priv->hw);
6251
6252         /* If we have not previously called iwl3945_init() then
6253          * clear all bits but the RF Kill and SUSPEND bits and return */
6254         if (!iwl3945_is_init(priv)) {
6255                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6256                                         STATUS_RF_KILL_HW |
6257                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6258                                         STATUS_RF_KILL_SW |
6259                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6260                                         STATUS_IN_SUSPEND;
6261                 goto exit;
6262         }
6263
6264         /* ...otherwise clear out all the status bits but the RF Kill and
6265          * SUSPEND bits and continue taking the NIC down. */
6266         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6267                                 STATUS_RF_KILL_HW |
6268                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6269                                 STATUS_RF_KILL_SW |
6270                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6271                                 STATUS_IN_SUSPEND |
6272                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6273                                 STATUS_FW_ERROR;
6274
6275         spin_lock_irqsave(&priv->lock, flags);
6276         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6277         spin_unlock_irqrestore(&priv->lock, flags);
6278
6279         iwl3945_hw_txq_ctx_stop(priv);
6280         iwl3945_hw_rxq_stop(priv);
6281
6282         spin_lock_irqsave(&priv->lock, flags);
6283         if (!iwl3945_grab_nic_access(priv)) {
6284                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
6285                                          APMG_CLK_VAL_DMA_CLK_RQT);
6286                 iwl3945_release_nic_access(priv);
6287         }
6288         spin_unlock_irqrestore(&priv->lock, flags);
6289
6290         udelay(5);
6291
6292         iwl3945_hw_nic_stop_master(priv);
6293         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6294         iwl3945_hw_nic_reset(priv);
6295
6296  exit:
6297         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
6298
6299         if (priv->ibss_beacon)
6300                 dev_kfree_skb(priv->ibss_beacon);
6301         priv->ibss_beacon = NULL;
6302
6303         /* clear out any free frames */
6304         iwl3945_clear_free_frames(priv);
6305 }
6306
6307 static void iwl3945_down(struct iwl3945_priv *priv)
6308 {
6309         mutex_lock(&priv->mutex);
6310         __iwl3945_down(priv);
6311         mutex_unlock(&priv->mutex);
6312
6313         iwl3945_cancel_deferred_work(priv);
6314 }
6315
6316 #define MAX_HW_RESTARTS 5
6317
6318 static int __iwl3945_up(struct iwl3945_priv *priv)
6319 {
6320         int rc, i;
6321
6322         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6323                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6324                 return -EIO;
6325         }
6326
6327         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6328                 IWL_WARNING("Radio disabled by SW RF kill (module "
6329                             "parameter)\n");
6330                 return -ENODEV;
6331         }
6332
6333         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6334                 IWL_ERROR("ucode not available for device bringup\n");
6335                 return -EIO;
6336         }
6337
6338         /* If platform's RF_KILL switch is NOT set to KILL */
6339         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
6340                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6341                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6342         else {
6343                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6344                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6345                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6346                         return -ENODEV;
6347                 }
6348         }
6349
6350         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6351
6352         rc = iwl3945_hw_nic_init(priv);
6353         if (rc) {
6354                 IWL_ERROR("Unable to int nic\n");
6355                 return rc;
6356         }
6357
6358         /* make sure rfkill handshake bits are cleared */
6359         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6360         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6361                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6362
6363         /* clear (again), then enable host interrupts */
6364         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
6365         iwl3945_enable_interrupts(priv);
6366
6367         /* really make sure rfkill handshake bits are cleared */
6368         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6369         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6370
6371         /* Copy original ucode data image from disk into backup cache.
6372          * This will be used to initialize the on-board processor's
6373          * data SRAM for a clean start when the runtime program first loads. */
6374         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6375                priv->ucode_data.len);
6376
6377         /* We return success when we resume from suspend and rf_kill is on. */
6378         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6379                 return 0;
6380
6381         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6382
6383                 iwl3945_clear_stations_table(priv);
6384
6385                 /* load bootstrap state machine,
6386                  * load bootstrap program into processor's memory,
6387                  * prepare to load the "initialize" uCode */
6388                 rc = iwl3945_load_bsm(priv);
6389
6390                 if (rc) {
6391                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6392                         continue;
6393                 }
6394
6395                 /* start card; "initialize" will load runtime ucode */
6396                 iwl3945_nic_start(priv);
6397
6398                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6399
6400                 return 0;
6401         }
6402
6403         set_bit(STATUS_EXIT_PENDING, &priv->status);
6404         __iwl3945_down(priv);
6405
6406         /* tried to restart and config the device for as long as our
6407          * patience could withstand */
6408         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6409         return -EIO;
6410 }
6411
6412
6413 /*****************************************************************************
6414  *
6415  * Workqueue callbacks
6416  *
6417  *****************************************************************************/
6418
6419 static void iwl3945_bg_init_alive_start(struct work_struct *data)
6420 {
6421         struct iwl3945_priv *priv =
6422             container_of(data, struct iwl3945_priv, init_alive_start.work);
6423
6424         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6425                 return;
6426
6427         mutex_lock(&priv->mutex);
6428         iwl3945_init_alive_start(priv);
6429         mutex_unlock(&priv->mutex);
6430 }
6431
6432 static void iwl3945_bg_alive_start(struct work_struct *data)
6433 {
6434         struct iwl3945_priv *priv =
6435             container_of(data, struct iwl3945_priv, alive_start.work);
6436
6437         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6438                 return;
6439
6440         mutex_lock(&priv->mutex);
6441         iwl3945_alive_start(priv);
6442         mutex_unlock(&priv->mutex);
6443 }
6444
6445 static void iwl3945_bg_rf_kill(struct work_struct *work)
6446 {
6447         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
6448
6449         wake_up_interruptible(&priv->wait_command_queue);
6450
6451         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6452                 return;
6453
6454         mutex_lock(&priv->mutex);
6455
6456         if (!iwl3945_is_rfkill(priv)) {
6457                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6458                           "HW and/or SW RF Kill no longer active, restarting "
6459                           "device\n");
6460                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6461                         queue_work(priv->workqueue, &priv->restart);
6462         } else {
6463
6464                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6465                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6466                                           "disabled by SW switch\n");
6467                 else
6468                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6469                                     "Kill switch must be turned off for "
6470                                     "wireless networking to work.\n");
6471         }
6472         mutex_unlock(&priv->mutex);
6473 }
6474
6475 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6476
6477 static void iwl3945_bg_scan_check(struct work_struct *data)
6478 {
6479         struct iwl3945_priv *priv =
6480             container_of(data, struct iwl3945_priv, scan_check.work);
6481
6482         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6483                 return;
6484
6485         mutex_lock(&priv->mutex);
6486         if (test_bit(STATUS_SCANNING, &priv->status) ||
6487             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6488                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6489                           "Scan completion watchdog resetting adapter (%dms)\n",
6490                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6491
6492                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6493                         iwl3945_send_scan_abort(priv);
6494         }
6495         mutex_unlock(&priv->mutex);
6496 }
6497
6498 static void iwl3945_bg_request_scan(struct work_struct *data)
6499 {
6500         struct iwl3945_priv *priv =
6501             container_of(data, struct iwl3945_priv, request_scan);
6502         struct iwl3945_host_cmd cmd = {
6503                 .id = REPLY_SCAN_CMD,
6504                 .len = sizeof(struct iwl3945_scan_cmd),
6505                 .meta.flags = CMD_SIZE_HUGE,
6506         };
6507         int rc = 0;
6508         struct iwl3945_scan_cmd *scan;
6509         struct ieee80211_conf *conf = NULL;
6510         u8 direct_mask;
6511         int phymode;
6512
6513         conf = ieee80211_get_hw_conf(priv->hw);
6514
6515         mutex_lock(&priv->mutex);
6516
6517         if (!iwl3945_is_ready(priv)) {
6518                 IWL_WARNING("request scan called when driver not ready.\n");
6519                 goto done;
6520         }
6521
6522         /* Make sure the scan wasn't cancelled before this queued work
6523          * was given the chance to run... */
6524         if (!test_bit(STATUS_SCANNING, &priv->status))
6525                 goto done;
6526
6527         /* This should never be called or scheduled if there is currently
6528          * a scan active in the hardware. */
6529         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6530                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6531                                "Ignoring second request.\n");
6532                 rc = -EIO;
6533                 goto done;
6534         }
6535
6536         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6537                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6538                 goto done;
6539         }
6540
6541         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6542                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6543                 goto done;
6544         }
6545
6546         if (iwl3945_is_rfkill(priv)) {
6547                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6548                 goto done;
6549         }
6550
6551         if (!test_bit(STATUS_READY, &priv->status)) {
6552                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6553                 goto done;
6554         }
6555
6556         if (!priv->scan_bands) {
6557                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6558                 goto done;
6559         }
6560
6561         if (!priv->scan) {
6562                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6563                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6564                 if (!priv->scan) {
6565                         rc = -ENOMEM;
6566                         goto done;
6567                 }
6568         }
6569         scan = priv->scan;
6570         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6571
6572         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6573         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6574
6575         if (iwl3945_is_associated(priv)) {
6576                 u16 interval = 0;
6577                 u32 extra;
6578                 u32 suspend_time = 100;
6579                 u32 scan_suspend_time = 100;
6580                 unsigned long flags;
6581
6582                 IWL_DEBUG_INFO("Scanning while associated...\n");
6583
6584                 spin_lock_irqsave(&priv->lock, flags);
6585                 interval = priv->beacon_int;
6586                 spin_unlock_irqrestore(&priv->lock, flags);
6587
6588                 scan->suspend_time = 0;
6589                 scan->max_out_time = cpu_to_le32(200 * 1024);
6590                 if (!interval)
6591                         interval = suspend_time;
6592                 /*
6593                  * suspend time format:
6594                  *  0-19: beacon interval in usec (time before exec.)
6595                  * 20-23: 0
6596                  * 24-31: number of beacons (suspend between channels)
6597                  */
6598
6599                 extra = (suspend_time / interval) << 24;
6600                 scan_suspend_time = 0xFF0FFFFF &
6601                     (extra | ((suspend_time % interval) * 1024));
6602
6603                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6604                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6605                                scan_suspend_time, interval);
6606         }
6607
6608         /* We should add the ability for user to lock to PASSIVE ONLY */
6609         if (priv->one_direct_scan) {
6610                 IWL_DEBUG_SCAN
6611                     ("Kicking off one direct scan for '%s'\n",
6612                      iwl3945_escape_essid(priv->direct_ssid,
6613                                       priv->direct_ssid_len));
6614                 scan->direct_scan[0].id = WLAN_EID_SSID;
6615                 scan->direct_scan[0].len = priv->direct_ssid_len;
6616                 memcpy(scan->direct_scan[0].ssid,
6617                        priv->direct_ssid, priv->direct_ssid_len);
6618                 direct_mask = 1;
6619         } else if (!iwl3945_is_associated(priv) && priv->essid_len) {
6620                 scan->direct_scan[0].id = WLAN_EID_SSID;
6621                 scan->direct_scan[0].len = priv->essid_len;
6622                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6623                 direct_mask = 1;
6624         } else
6625                 direct_mask = 0;
6626
6627         /* We don't build a direct scan probe request; the uCode will do
6628          * that based on the direct_mask added to each channel entry */
6629         scan->tx_cmd.len = cpu_to_le16(
6630                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6631                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0));
6632         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6633         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6634         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6635
6636         /* flags + rate selection */
6637
6638         switch (priv->scan_bands) {
6639         case 2:
6640                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6641                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6642                 scan->good_CRC_th = 0;
6643                 phymode = MODE_IEEE80211G;
6644                 break;
6645
6646         case 1:
6647                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6648                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6649                 phymode = MODE_IEEE80211A;
6650                 break;
6651
6652         default:
6653                 IWL_WARNING("Invalid scan band count\n");
6654                 goto done;
6655         }
6656
6657         /* select Rx antennas */
6658         scan->flags |= iwl3945_get_antenna_flags(priv);
6659
6660         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6661                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6662
6663         if (direct_mask)
6664                 IWL_DEBUG_SCAN
6665                     ("Initiating direct scan for %s.\n",
6666                      iwl3945_escape_essid(priv->essid, priv->essid_len));
6667         else
6668                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6669
6670         scan->channel_count =
6671                 iwl3945_get_channels_for_scan(
6672                         priv, phymode, 1, /* active */
6673                         direct_mask,
6674                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6675
6676         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6677             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6678         cmd.data = scan;
6679         scan->len = cpu_to_le16(cmd.len);
6680
6681         set_bit(STATUS_SCAN_HW, &priv->status);
6682         rc = iwl3945_send_cmd_sync(priv, &cmd);
6683         if (rc)
6684                 goto done;
6685
6686         queue_delayed_work(priv->workqueue, &priv->scan_check,
6687                            IWL_SCAN_CHECK_WATCHDOG);
6688
6689         mutex_unlock(&priv->mutex);
6690         return;
6691
6692  done:
6693         /* inform mac80211 scan aborted */
6694         queue_work(priv->workqueue, &priv->scan_completed);
6695         mutex_unlock(&priv->mutex);
6696 }
6697
6698 static void iwl3945_bg_up(struct work_struct *data)
6699 {
6700         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6701
6702         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6703                 return;
6704
6705         mutex_lock(&priv->mutex);
6706         __iwl3945_up(priv);
6707         mutex_unlock(&priv->mutex);
6708 }
6709
6710 static void iwl3945_bg_restart(struct work_struct *data)
6711 {
6712         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6713
6714         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6715                 return;
6716
6717         iwl3945_down(priv);
6718         queue_work(priv->workqueue, &priv->up);
6719 }
6720
6721 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6722 {
6723         struct iwl3945_priv *priv =
6724             container_of(data, struct iwl3945_priv, rx_replenish);
6725
6726         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6727                 return;
6728
6729         mutex_lock(&priv->mutex);
6730         iwl3945_rx_replenish(priv);
6731         mutex_unlock(&priv->mutex);
6732 }
6733
6734 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6735
6736 static void iwl3945_bg_post_associate(struct work_struct *data)
6737 {
6738         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv,
6739                                              post_associate.work);
6740
6741         int rc = 0;
6742         struct ieee80211_conf *conf = NULL;
6743         DECLARE_MAC_BUF(mac);
6744
6745         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6746                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6747                 return;
6748         }
6749
6750
6751         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6752                         priv->assoc_id,
6753                         print_mac(mac, priv->active_rxon.bssid_addr));
6754
6755         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6756                 return;
6757
6758         mutex_lock(&priv->mutex);
6759
6760         if (!priv->vif || !priv->is_open) {
6761                 mutex_unlock(&priv->mutex);
6762                 return;
6763         }
6764         iwl3945_scan_cancel_timeout(priv, 200);
6765
6766         conf = ieee80211_get_hw_conf(priv->hw);
6767
6768         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6769         iwl3945_commit_rxon(priv);
6770
6771         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6772         iwl3945_setup_rxon_timing(priv);
6773         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6774                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6775         if (rc)
6776                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6777                             "Attempting to continue.\n");
6778
6779         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6780
6781         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6782
6783         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6784                         priv->assoc_id, priv->beacon_int);
6785
6786         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6787                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6788         else
6789                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6790
6791         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6792                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6793                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6794                 else
6795                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6796
6797                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6798                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6799
6800         }
6801
6802         iwl3945_commit_rxon(priv);
6803
6804         switch (priv->iw_mode) {
6805         case IEEE80211_IF_TYPE_STA:
6806                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6807                 break;
6808
6809         case IEEE80211_IF_TYPE_IBSS:
6810
6811                 /* clear out the station table */
6812                 iwl3945_clear_stations_table(priv);
6813
6814                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6815                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6816                 iwl3945_sync_sta(priv, IWL_STA_ID,
6817                                  (priv->phymode == MODE_IEEE80211A)?
6818                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6819                                  CMD_ASYNC);
6820                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6821                 iwl3945_send_beacon_cmd(priv);
6822
6823                 break;
6824
6825         default:
6826                  IWL_ERROR("%s Should not be called in %d mode\n",
6827                            __FUNCTION__, priv->iw_mode);
6828                 break;
6829         }
6830
6831         iwl3945_sequence_reset(priv);
6832
6833 #ifdef CONFIG_IWL3945_QOS
6834         iwl3945_activate_qos(priv, 0);
6835 #endif /* CONFIG_IWL3945_QOS */
6836         /* we have just associated, don't start scan too early */
6837         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6838         mutex_unlock(&priv->mutex);
6839 }
6840
6841 static void iwl3945_bg_abort_scan(struct work_struct *work)
6842 {
6843         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6844
6845         if (!iwl3945_is_ready(priv))
6846                 return;
6847
6848         mutex_lock(&priv->mutex);
6849
6850         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6851         iwl3945_send_scan_abort(priv);
6852
6853         mutex_unlock(&priv->mutex);
6854 }
6855
6856 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6857
6858 static void iwl3945_bg_scan_completed(struct work_struct *work)
6859 {
6860         struct iwl3945_priv *priv =
6861             container_of(work, struct iwl3945_priv, scan_completed);
6862
6863         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6864
6865         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6866                 return;
6867
6868         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6869                 iwl3945_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6870
6871         ieee80211_scan_completed(priv->hw);
6872
6873         /* Since setting the TXPOWER may have been deferred while
6874          * performing the scan, fire one off */
6875         mutex_lock(&priv->mutex);
6876         iwl3945_hw_reg_send_txpower(priv);
6877         mutex_unlock(&priv->mutex);
6878 }
6879
6880 /*****************************************************************************
6881  *
6882  * mac80211 entry point functions
6883  *
6884  *****************************************************************************/
6885
6886 #define UCODE_READY_TIMEOUT     (2 * HZ)
6887
6888 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6889 {
6890         struct iwl3945_priv *priv = hw->priv;
6891         int ret;
6892
6893         IWL_DEBUG_MAC80211("enter\n");
6894
6895         if (pci_enable_device(priv->pci_dev)) {
6896                 IWL_ERROR("Fail to pci_enable_device\n");
6897                 return -ENODEV;
6898         }
6899         pci_restore_state(priv->pci_dev);
6900         pci_enable_msi(priv->pci_dev);
6901
6902         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6903                           DRV_NAME, priv);
6904         if (ret) {
6905                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6906                 goto out_disable_msi;
6907         }
6908
6909         /* we should be verifying the device is ready to be opened */
6910         mutex_lock(&priv->mutex);
6911
6912         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6913         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6914          * ucode filename and max sizes are card-specific. */
6915
6916         if (!priv->ucode_code.len) {
6917                 ret = iwl3945_read_ucode(priv);
6918                 if (ret) {
6919                         IWL_ERROR("Could not read microcode: %d\n", ret);
6920                         mutex_unlock(&priv->mutex);
6921                         goto out_release_irq;
6922                 }
6923         }
6924
6925         ret = __iwl3945_up(priv);
6926
6927         mutex_unlock(&priv->mutex);
6928
6929         if (ret)
6930                 goto out_release_irq;
6931
6932         IWL_DEBUG_INFO("Start UP work.\n");
6933
6934         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6935                 return 0;
6936
6937         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6938          * mac80211 will not be run successfully. */
6939         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6940                         test_bit(STATUS_READY, &priv->status),
6941                         UCODE_READY_TIMEOUT);
6942         if (!ret) {
6943                 if (!test_bit(STATUS_READY, &priv->status)) {
6944                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6945                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6946                         ret = -ETIMEDOUT;
6947                         goto out_release_irq;
6948                 }
6949         }
6950
6951         priv->is_open = 1;
6952         IWL_DEBUG_MAC80211("leave\n");
6953         return 0;
6954
6955 out_release_irq:
6956         free_irq(priv->pci_dev->irq, priv);
6957 out_disable_msi:
6958         pci_disable_msi(priv->pci_dev);
6959         pci_disable_device(priv->pci_dev);
6960         priv->is_open = 0;
6961         IWL_DEBUG_MAC80211("leave - failed\n");
6962         return ret;
6963 }
6964
6965 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6966 {
6967         struct iwl3945_priv *priv = hw->priv;
6968
6969         IWL_DEBUG_MAC80211("enter\n");
6970
6971         if (!priv->is_open) {
6972                 IWL_DEBUG_MAC80211("leave - skip\n");
6973                 return;
6974         }
6975
6976         priv->is_open = 0;
6977
6978         if (iwl3945_is_ready_rf(priv)) {
6979                 /* stop mac, cancel any scan request and clear
6980                  * RXON_FILTER_ASSOC_MSK BIT
6981                  */
6982                 mutex_lock(&priv->mutex);
6983                 iwl3945_scan_cancel_timeout(priv, 100);
6984                 cancel_delayed_work(&priv->post_associate);
6985                 mutex_unlock(&priv->mutex);
6986         }
6987
6988         iwl3945_down(priv);
6989
6990         flush_workqueue(priv->workqueue);
6991         free_irq(priv->pci_dev->irq, priv);
6992         pci_disable_msi(priv->pci_dev);
6993         pci_save_state(priv->pci_dev);
6994         pci_disable_device(priv->pci_dev);
6995
6996         IWL_DEBUG_MAC80211("leave\n");
6997 }
6998
6999 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7000                       struct ieee80211_tx_control *ctl)
7001 {
7002         struct iwl3945_priv *priv = hw->priv;
7003
7004         IWL_DEBUG_MAC80211("enter\n");
7005
7006         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7007                 IWL_DEBUG_MAC80211("leave - monitor\n");
7008                 return -1;
7009         }
7010
7011         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7012                      ctl->tx_rate);
7013
7014         if (iwl3945_tx_skb(priv, skb, ctl))
7015                 dev_kfree_skb_any(skb);
7016
7017         IWL_DEBUG_MAC80211("leave\n");
7018         return 0;
7019 }
7020
7021 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
7022                                  struct ieee80211_if_init_conf *conf)
7023 {
7024         struct iwl3945_priv *priv = hw->priv;
7025         unsigned long flags;
7026         DECLARE_MAC_BUF(mac);
7027
7028         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
7029
7030         if (priv->vif) {
7031                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
7032                 return -EOPNOTSUPP;
7033         }
7034
7035         spin_lock_irqsave(&priv->lock, flags);
7036         priv->vif = conf->vif;
7037
7038         spin_unlock_irqrestore(&priv->lock, flags);
7039
7040         mutex_lock(&priv->mutex);
7041
7042         if (conf->mac_addr) {
7043                 IWL_DEBUG_MAC80211("Set: %s\n", print_mac(mac, conf->mac_addr));
7044                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7045         }
7046
7047         if (iwl3945_is_ready(priv))
7048                 iwl3945_set_mode(priv, conf->type);
7049
7050         mutex_unlock(&priv->mutex);
7051
7052         IWL_DEBUG_MAC80211("leave\n");
7053         return 0;
7054 }
7055
7056 /**
7057  * iwl3945_mac_config - mac80211 config callback
7058  *
7059  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7060  * be set inappropriately and the driver currently sets the hardware up to
7061  * use it whenever needed.
7062  */
7063 static int iwl3945_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7064 {
7065         struct iwl3945_priv *priv = hw->priv;
7066         const struct iwl3945_channel_info *ch_info;
7067         unsigned long flags;
7068         int ret = 0;
7069
7070         mutex_lock(&priv->mutex);
7071         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7072
7073         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7074
7075         if (!iwl3945_is_ready(priv)) {
7076                 IWL_DEBUG_MAC80211("leave - not ready\n");
7077                 ret = -EIO;
7078                 goto out;
7079         }
7080
7081         if (unlikely(!iwl3945_param_disable_hw_scan &&
7082                      test_bit(STATUS_SCANNING, &priv->status))) {
7083                 IWL_DEBUG_MAC80211("leave - scanning\n");
7084                 set_bit(STATUS_CONF_PENDING, &priv->status);
7085                 mutex_unlock(&priv->mutex);
7086                 return 0;
7087         }
7088
7089         spin_lock_irqsave(&priv->lock, flags);
7090
7091         ch_info = iwl3945_get_channel_info(priv, conf->phymode, conf->channel);
7092         if (!is_channel_valid(ch_info)) {
7093                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7094                                conf->channel, conf->phymode);
7095                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7096                 spin_unlock_irqrestore(&priv->lock, flags);
7097                 ret = -EINVAL;
7098                 goto out;
7099         }
7100
7101         iwl3945_set_rxon_channel(priv, conf->phymode, conf->channel);
7102
7103         iwl3945_set_flags_for_phymode(priv, conf->phymode);
7104
7105         /* The list of supported rates and rate mask can be different
7106          * for each phymode; since the phymode may have changed, reset
7107          * the rate mask to what mac80211 lists */
7108         iwl3945_set_rate(priv);
7109
7110         spin_unlock_irqrestore(&priv->lock, flags);
7111
7112 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7113         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7114                 iwl3945_hw_channel_switch(priv, conf->channel);
7115                 goto out;
7116         }
7117 #endif
7118
7119         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
7120
7121         if (!conf->radio_enabled) {
7122                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7123                 goto out;
7124         }
7125
7126         if (iwl3945_is_rfkill(priv)) {
7127                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7128                 ret = -EIO;
7129                 goto out;
7130         }
7131
7132         iwl3945_set_rate(priv);
7133
7134         if (memcmp(&priv->active_rxon,
7135                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7136                 iwl3945_commit_rxon(priv);
7137         else
7138                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7139
7140         IWL_DEBUG_MAC80211("leave\n");
7141
7142 out:
7143         clear_bit(STATUS_CONF_PENDING, &priv->status);
7144         mutex_unlock(&priv->mutex);
7145         return ret;
7146 }
7147
7148 static void iwl3945_config_ap(struct iwl3945_priv *priv)
7149 {
7150         int rc = 0;
7151
7152         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7153                 return;
7154
7155         /* The following should be done only at AP bring up */
7156         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7157
7158                 /* RXON - unassoc (to set timing command) */
7159                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7160                 iwl3945_commit_rxon(priv);
7161
7162                 /* RXON Timing */
7163                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
7164                 iwl3945_setup_rxon_timing(priv);
7165                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7166                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7167                 if (rc)
7168                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7169                                         "Attempting to continue.\n");
7170
7171                 /* FIXME: what should be the assoc_id for AP? */
7172                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7173                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7174                         priv->staging_rxon.flags |=
7175                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7176                 else
7177                         priv->staging_rxon.flags &=
7178                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7179
7180                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7181                         if (priv->assoc_capability &
7182                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7183                                 priv->staging_rxon.flags |=
7184                                         RXON_FLG_SHORT_SLOT_MSK;
7185                         else
7186                                 priv->staging_rxon.flags &=
7187                                         ~RXON_FLG_SHORT_SLOT_MSK;
7188
7189                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7190                                 priv->staging_rxon.flags &=
7191                                         ~RXON_FLG_SHORT_SLOT_MSK;
7192                 }
7193                 /* restore RXON assoc */
7194                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7195                 iwl3945_commit_rxon(priv);
7196                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
7197         }
7198         iwl3945_send_beacon_cmd(priv);
7199
7200         /* FIXME - we need to add code here to detect a totally new
7201          * configuration, reset the AP, unassoc, rxon timing, assoc,
7202          * clear sta table, add BCAST sta... */
7203 }
7204
7205 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
7206                                         struct ieee80211_vif *vif,
7207                                     struct ieee80211_if_conf *conf)
7208 {
7209         struct iwl3945_priv *priv = hw->priv;
7210         DECLARE_MAC_BUF(mac);
7211         unsigned long flags;
7212         int rc;
7213
7214         if (conf == NULL)
7215                 return -EIO;
7216
7217         /* XXX: this MUST use conf->mac_addr */
7218
7219         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7220             (!conf->beacon || !conf->ssid_len)) {
7221                 IWL_DEBUG_MAC80211
7222                     ("Leaving in AP mode because HostAPD is not ready.\n");
7223                 return 0;
7224         }
7225
7226         if (!iwl3945_is_alive(priv))
7227                 return -EAGAIN;
7228
7229         mutex_lock(&priv->mutex);
7230
7231         if (conf->bssid)
7232                 IWL_DEBUG_MAC80211("bssid: %s\n",
7233                                    print_mac(mac, conf->bssid));
7234
7235 /*
7236  * very dubious code was here; the probe filtering flag is never set:
7237  *
7238         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7239             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7240  */
7241         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7242                 IWL_DEBUG_MAC80211("leave - scanning\n");
7243                 mutex_unlock(&priv->mutex);
7244                 return 0;
7245         }
7246
7247         if (priv->vif != vif) {
7248                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7249                 mutex_unlock(&priv->mutex);
7250                 return 0;
7251         }
7252
7253         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7254                 if (!conf->bssid) {
7255                         conf->bssid = priv->mac_addr;
7256                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7257                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7258                                            print_mac(mac, conf->bssid));
7259                 }
7260                 if (priv->ibss_beacon)
7261                         dev_kfree_skb(priv->ibss_beacon);
7262
7263                 priv->ibss_beacon = conf->beacon;
7264         }
7265
7266         if (iwl3945_is_rfkill(priv))
7267                 goto done;
7268
7269         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7270             !is_multicast_ether_addr(conf->bssid)) {
7271                 /* If there is currently a HW scan going on in the background
7272                  * then we need to cancel it else the RXON below will fail. */
7273                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
7274                         IWL_WARNING("Aborted scan still in progress "
7275                                     "after 100ms\n");
7276                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7277                         mutex_unlock(&priv->mutex);
7278                         return -EAGAIN;
7279                 }
7280                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7281
7282                 /* TODO: Audit driver for usage of these members and see
7283                  * if mac80211 deprecates them (priv->bssid looks like it
7284                  * shouldn't be there, but I haven't scanned the IBSS code
7285                  * to verify) - jpk */
7286                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7287
7288                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7289                         iwl3945_config_ap(priv);
7290                 else {
7291                         rc = iwl3945_commit_rxon(priv);
7292                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7293                                 iwl3945_add_station(priv,
7294                                         priv->active_rxon.bssid_addr, 1, 0);
7295                 }
7296
7297         } else {
7298                 iwl3945_scan_cancel_timeout(priv, 100);
7299                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7300                 iwl3945_commit_rxon(priv);
7301         }
7302
7303  done:
7304         spin_lock_irqsave(&priv->lock, flags);
7305         if (!conf->ssid_len)
7306                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7307         else
7308                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7309
7310         priv->essid_len = conf->ssid_len;
7311         spin_unlock_irqrestore(&priv->lock, flags);
7312
7313         IWL_DEBUG_MAC80211("leave\n");
7314         mutex_unlock(&priv->mutex);
7315
7316         return 0;
7317 }
7318
7319 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
7320                                  unsigned int changed_flags,
7321                                  unsigned int *total_flags,
7322                                  int mc_count, struct dev_addr_list *mc_list)
7323 {
7324         /*
7325          * XXX: dummy
7326          * see also iwl3945_connection_init_rx_config
7327          */
7328         *total_flags = 0;
7329 }
7330
7331 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
7332                                      struct ieee80211_if_init_conf *conf)
7333 {
7334         struct iwl3945_priv *priv = hw->priv;
7335
7336         IWL_DEBUG_MAC80211("enter\n");
7337
7338         mutex_lock(&priv->mutex);
7339
7340         if (iwl3945_is_ready_rf(priv)) {
7341                 iwl3945_scan_cancel_timeout(priv, 100);
7342                 cancel_delayed_work(&priv->post_associate);
7343                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7344                 iwl3945_commit_rxon(priv);
7345         }
7346         if (priv->vif == conf->vif) {
7347                 priv->vif = NULL;
7348                 memset(priv->bssid, 0, ETH_ALEN);
7349                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7350                 priv->essid_len = 0;
7351         }
7352         mutex_unlock(&priv->mutex);
7353
7354         IWL_DEBUG_MAC80211("leave\n");
7355 }
7356
7357 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7358 {
7359         int rc = 0;
7360         unsigned long flags;
7361         struct iwl3945_priv *priv = hw->priv;
7362
7363         IWL_DEBUG_MAC80211("enter\n");
7364
7365         mutex_lock(&priv->mutex);
7366         spin_lock_irqsave(&priv->lock, flags);
7367
7368         if (!iwl3945_is_ready_rf(priv)) {
7369                 rc = -EIO;
7370                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7371                 goto out_unlock;
7372         }
7373
7374         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7375                 rc = -EIO;
7376                 IWL_ERROR("ERROR: APs don't scan\n");
7377                 goto out_unlock;
7378         }
7379
7380         /* we don't schedule scan within next_scan_jiffies period */
7381         if (priv->next_scan_jiffies &&
7382                         time_after(priv->next_scan_jiffies, jiffies)) {
7383                 rc = -EAGAIN;
7384                 goto out_unlock;
7385         }
7386         /* if we just finished scan ask for delay */
7387         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7388                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7389                 rc = -EAGAIN;
7390                 goto out_unlock;
7391         }
7392         if (len) {
7393                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7394                                iwl3945_escape_essid(ssid, len), (int)len);
7395
7396                 priv->one_direct_scan = 1;
7397                 priv->direct_ssid_len = (u8)
7398                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7399                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7400         } else
7401                 priv->one_direct_scan = 0;
7402
7403         rc = iwl3945_scan_initiate(priv);
7404
7405         IWL_DEBUG_MAC80211("leave\n");
7406
7407 out_unlock:
7408         spin_unlock_irqrestore(&priv->lock, flags);
7409         mutex_unlock(&priv->mutex);
7410
7411         return rc;
7412 }
7413
7414 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7415                            const u8 *local_addr, const u8 *addr,
7416                            struct ieee80211_key_conf *key)
7417 {
7418         struct iwl3945_priv *priv = hw->priv;
7419         int rc = 0;
7420         u8 sta_id;
7421
7422         IWL_DEBUG_MAC80211("enter\n");
7423
7424         if (!iwl3945_param_hwcrypto) {
7425                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7426                 return -EOPNOTSUPP;
7427         }
7428
7429         if (is_zero_ether_addr(addr))
7430                 /* only support pairwise keys */
7431                 return -EOPNOTSUPP;
7432
7433         sta_id = iwl3945_hw_find_station(priv, addr);
7434         if (sta_id == IWL_INVALID_STATION) {
7435                 DECLARE_MAC_BUF(mac);
7436
7437                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7438                                    print_mac(mac, addr));
7439                 return -EINVAL;
7440         }
7441
7442         mutex_lock(&priv->mutex);
7443
7444         iwl3945_scan_cancel_timeout(priv, 100);
7445
7446         switch (cmd) {
7447         case  SET_KEY:
7448                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7449                 if (!rc) {
7450                         iwl3945_set_rxon_hwcrypto(priv, 1);
7451                         iwl3945_commit_rxon(priv);
7452                         key->hw_key_idx = sta_id;
7453                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7454                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7455                 }
7456                 break;
7457         case DISABLE_KEY:
7458                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7459                 if (!rc) {
7460                         iwl3945_set_rxon_hwcrypto(priv, 0);
7461                         iwl3945_commit_rxon(priv);
7462                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7463                 }
7464                 break;
7465         default:
7466                 rc = -EINVAL;
7467         }
7468
7469         IWL_DEBUG_MAC80211("leave\n");
7470         mutex_unlock(&priv->mutex);
7471
7472         return rc;
7473 }
7474
7475 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7476                            const struct ieee80211_tx_queue_params *params)
7477 {
7478         struct iwl3945_priv *priv = hw->priv;
7479 #ifdef CONFIG_IWL3945_QOS
7480         unsigned long flags;
7481         int q;
7482 #endif /* CONFIG_IWL3945_QOS */
7483
7484         IWL_DEBUG_MAC80211("enter\n");
7485
7486         if (!iwl3945_is_ready_rf(priv)) {
7487                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7488                 return -EIO;
7489         }
7490
7491         if (queue >= AC_NUM) {
7492                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7493                 return 0;
7494         }
7495
7496 #ifdef CONFIG_IWL3945_QOS
7497         if (!priv->qos_data.qos_enable) {
7498                 priv->qos_data.qos_active = 0;
7499                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7500                 return 0;
7501         }
7502         q = AC_NUM - 1 - queue;
7503
7504         spin_lock_irqsave(&priv->lock, flags);
7505
7506         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7507         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7508         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7509         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7510                         cpu_to_le16((params->burst_time * 100));
7511
7512         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7513         priv->qos_data.qos_active = 1;
7514
7515         spin_unlock_irqrestore(&priv->lock, flags);
7516
7517         mutex_lock(&priv->mutex);
7518         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7519                 iwl3945_activate_qos(priv, 1);
7520         else if (priv->assoc_id && iwl3945_is_associated(priv))
7521                 iwl3945_activate_qos(priv, 0);
7522
7523         mutex_unlock(&priv->mutex);
7524
7525 #endif /*CONFIG_IWL3945_QOS */
7526
7527         IWL_DEBUG_MAC80211("leave\n");
7528         return 0;
7529 }
7530
7531 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7532                                 struct ieee80211_tx_queue_stats *stats)
7533 {
7534         struct iwl3945_priv *priv = hw->priv;
7535         int i, avail;
7536         struct iwl3945_tx_queue *txq;
7537         struct iwl3945_queue *q;
7538         unsigned long flags;
7539
7540         IWL_DEBUG_MAC80211("enter\n");
7541
7542         if (!iwl3945_is_ready_rf(priv)) {
7543                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7544                 return -EIO;
7545         }
7546
7547         spin_lock_irqsave(&priv->lock, flags);
7548
7549         for (i = 0; i < AC_NUM; i++) {
7550                 txq = &priv->txq[i];
7551                 q = &txq->q;
7552                 avail = iwl3945_queue_space(q);
7553
7554                 stats->data[i].len = q->n_window - avail;
7555                 stats->data[i].limit = q->n_window - q->high_mark;
7556                 stats->data[i].count = q->n_window;
7557
7558         }
7559         spin_unlock_irqrestore(&priv->lock, flags);
7560
7561         IWL_DEBUG_MAC80211("leave\n");
7562
7563         return 0;
7564 }
7565
7566 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7567                              struct ieee80211_low_level_stats *stats)
7568 {
7569         IWL_DEBUG_MAC80211("enter\n");
7570         IWL_DEBUG_MAC80211("leave\n");
7571
7572         return 0;
7573 }
7574
7575 static u64 iwl3945_mac_get_tsf(struct ieee80211_hw *hw)
7576 {
7577         IWL_DEBUG_MAC80211("enter\n");
7578         IWL_DEBUG_MAC80211("leave\n");
7579
7580         return 0;
7581 }
7582
7583 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7584 {
7585         struct iwl3945_priv *priv = hw->priv;
7586         unsigned long flags;
7587
7588         mutex_lock(&priv->mutex);
7589         IWL_DEBUG_MAC80211("enter\n");
7590
7591 #ifdef CONFIG_IWL3945_QOS
7592         iwl3945_reset_qos(priv);
7593 #endif
7594         cancel_delayed_work(&priv->post_associate);
7595
7596         spin_lock_irqsave(&priv->lock, flags);
7597         priv->assoc_id = 0;
7598         priv->assoc_capability = 0;
7599         priv->call_post_assoc_from_beacon = 0;
7600
7601         /* new association get rid of ibss beacon skb */
7602         if (priv->ibss_beacon)
7603                 dev_kfree_skb(priv->ibss_beacon);
7604
7605         priv->ibss_beacon = NULL;
7606
7607         priv->beacon_int = priv->hw->conf.beacon_int;
7608         priv->timestamp1 = 0;
7609         priv->timestamp0 = 0;
7610         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7611                 priv->beacon_int = 0;
7612
7613         spin_unlock_irqrestore(&priv->lock, flags);
7614
7615         if (!iwl3945_is_ready_rf(priv)) {
7616                 IWL_DEBUG_MAC80211("leave - not ready\n");
7617                 mutex_unlock(&priv->mutex);
7618                 return;
7619         }
7620
7621         /* we are restarting association process
7622          * clear RXON_FILTER_ASSOC_MSK bit
7623         */
7624         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7625                 iwl3945_scan_cancel_timeout(priv, 100);
7626                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7627                 iwl3945_commit_rxon(priv);
7628         }
7629
7630         /* Per mac80211.h: This is only used in IBSS mode... */
7631         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7632
7633                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7634                 mutex_unlock(&priv->mutex);
7635                 return;
7636         }
7637
7638         priv->only_active_channel = 0;
7639
7640         iwl3945_set_rate(priv);
7641
7642         mutex_unlock(&priv->mutex);
7643
7644         IWL_DEBUG_MAC80211("leave\n");
7645
7646 }
7647
7648 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7649                                  struct ieee80211_tx_control *control)
7650 {
7651         struct iwl3945_priv *priv = hw->priv;
7652         unsigned long flags;
7653
7654         mutex_lock(&priv->mutex);
7655         IWL_DEBUG_MAC80211("enter\n");
7656
7657         if (!iwl3945_is_ready_rf(priv)) {
7658                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7659                 mutex_unlock(&priv->mutex);
7660                 return -EIO;
7661         }
7662
7663         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7664                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7665                 mutex_unlock(&priv->mutex);
7666                 return -EIO;
7667         }
7668
7669         spin_lock_irqsave(&priv->lock, flags);
7670
7671         if (priv->ibss_beacon)
7672                 dev_kfree_skb(priv->ibss_beacon);
7673
7674         priv->ibss_beacon = skb;
7675
7676         priv->assoc_id = 0;
7677
7678         IWL_DEBUG_MAC80211("leave\n");
7679         spin_unlock_irqrestore(&priv->lock, flags);
7680
7681 #ifdef CONFIG_IWL3945_QOS
7682         iwl3945_reset_qos(priv);
7683 #endif
7684
7685         queue_work(priv->workqueue, &priv->post_associate.work);
7686
7687         mutex_unlock(&priv->mutex);
7688
7689         return 0;
7690 }
7691
7692 /*****************************************************************************
7693  *
7694  * sysfs attributes
7695  *
7696  *****************************************************************************/
7697
7698 #ifdef CONFIG_IWL3945_DEBUG
7699
7700 /*
7701  * The following adds a new attribute to the sysfs representation
7702  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7703  * used for controlling the debug level.
7704  *
7705  * See the level definitions in iwl for details.
7706  */
7707
7708 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7709 {
7710         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7711 }
7712 static ssize_t store_debug_level(struct device_driver *d,
7713                                  const char *buf, size_t count)
7714 {
7715         char *p = (char *)buf;
7716         u32 val;
7717
7718         val = simple_strtoul(p, &p, 0);
7719         if (p == buf)
7720                 printk(KERN_INFO DRV_NAME
7721                        ": %s is not in hex or decimal form.\n", buf);
7722         else
7723                 iwl3945_debug_level = val;
7724
7725         return strnlen(buf, count);
7726 }
7727
7728 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7729                    show_debug_level, store_debug_level);
7730
7731 #endif /* CONFIG_IWL3945_DEBUG */
7732
7733 static ssize_t show_rf_kill(struct device *d,
7734                             struct device_attribute *attr, char *buf)
7735 {
7736         /*
7737          * 0 - RF kill not enabled
7738          * 1 - SW based RF kill active (sysfs)
7739          * 2 - HW based RF kill active
7740          * 3 - Both HW and SW based RF kill active
7741          */
7742         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7743         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7744                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7745
7746         return sprintf(buf, "%i\n", val);
7747 }
7748
7749 static ssize_t store_rf_kill(struct device *d,
7750                              struct device_attribute *attr,
7751                              const char *buf, size_t count)
7752 {
7753         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7754
7755         mutex_lock(&priv->mutex);
7756         iwl3945_radio_kill_sw(priv, buf[0] == '1');
7757         mutex_unlock(&priv->mutex);
7758
7759         return count;
7760 }
7761
7762 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7763
7764 static ssize_t show_temperature(struct device *d,
7765                                 struct device_attribute *attr, char *buf)
7766 {
7767         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7768
7769         if (!iwl3945_is_alive(priv))
7770                 return -EAGAIN;
7771
7772         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7773 }
7774
7775 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7776
7777 static ssize_t show_rs_window(struct device *d,
7778                               struct device_attribute *attr,
7779                               char *buf)
7780 {
7781         struct iwl3945_priv *priv = d->driver_data;
7782         return iwl3945_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7783 }
7784 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7785
7786 static ssize_t show_tx_power(struct device *d,
7787                              struct device_attribute *attr, char *buf)
7788 {
7789         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7790         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7791 }
7792
7793 static ssize_t store_tx_power(struct device *d,
7794                               struct device_attribute *attr,
7795                               const char *buf, size_t count)
7796 {
7797         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7798         char *p = (char *)buf;
7799         u32 val;
7800
7801         val = simple_strtoul(p, &p, 10);
7802         if (p == buf)
7803                 printk(KERN_INFO DRV_NAME
7804                        ": %s is not in decimal form.\n", buf);
7805         else
7806                 iwl3945_hw_reg_set_txpower(priv, val);
7807
7808         return count;
7809 }
7810
7811 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7812
7813 static ssize_t show_flags(struct device *d,
7814                           struct device_attribute *attr, char *buf)
7815 {
7816         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7817
7818         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7819 }
7820
7821 static ssize_t store_flags(struct device *d,
7822                            struct device_attribute *attr,
7823                            const char *buf, size_t count)
7824 {
7825         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7826         u32 flags = simple_strtoul(buf, NULL, 0);
7827
7828         mutex_lock(&priv->mutex);
7829         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7830                 /* Cancel any currently running scans... */
7831                 if (iwl3945_scan_cancel_timeout(priv, 100))
7832                         IWL_WARNING("Could not cancel scan.\n");
7833                 else {
7834                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7835                                        flags);
7836                         priv->staging_rxon.flags = cpu_to_le32(flags);
7837                         iwl3945_commit_rxon(priv);
7838                 }
7839         }
7840         mutex_unlock(&priv->mutex);
7841
7842         return count;
7843 }
7844
7845 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7846
7847 static ssize_t show_filter_flags(struct device *d,
7848                                  struct device_attribute *attr, char *buf)
7849 {
7850         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7851
7852         return sprintf(buf, "0x%04X\n",
7853                 le32_to_cpu(priv->active_rxon.filter_flags));
7854 }
7855
7856 static ssize_t store_filter_flags(struct device *d,
7857                                   struct device_attribute *attr,
7858                                   const char *buf, size_t count)
7859 {
7860         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7861         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7862
7863         mutex_lock(&priv->mutex);
7864         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7865                 /* Cancel any currently running scans... */
7866                 if (iwl3945_scan_cancel_timeout(priv, 100))
7867                         IWL_WARNING("Could not cancel scan.\n");
7868                 else {
7869                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7870                                        "0x%04X\n", filter_flags);
7871                         priv->staging_rxon.filter_flags =
7872                                 cpu_to_le32(filter_flags);
7873                         iwl3945_commit_rxon(priv);
7874                 }
7875         }
7876         mutex_unlock(&priv->mutex);
7877
7878         return count;
7879 }
7880
7881 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7882                    store_filter_flags);
7883
7884 static ssize_t show_tune(struct device *d,
7885                          struct device_attribute *attr, char *buf)
7886 {
7887         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7888
7889         return sprintf(buf, "0x%04X\n",
7890                        (priv->phymode << 8) |
7891                         le16_to_cpu(priv->active_rxon.channel));
7892 }
7893
7894 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv, u8 phymode);
7895
7896 static ssize_t store_tune(struct device *d,
7897                           struct device_attribute *attr,
7898                           const char *buf, size_t count)
7899 {
7900         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7901         char *p = (char *)buf;
7902         u16 tune = simple_strtoul(p, &p, 0);
7903         u8 phymode = (tune >> 8) & 0xff;
7904         u16 channel = tune & 0xff;
7905
7906         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7907
7908         mutex_lock(&priv->mutex);
7909         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7910             (priv->phymode != phymode)) {
7911                 const struct iwl3945_channel_info *ch_info;
7912
7913                 ch_info = iwl3945_get_channel_info(priv, phymode, channel);
7914                 if (!ch_info) {
7915                         IWL_WARNING("Requested invalid phymode/channel "
7916                                     "combination: %d %d\n", phymode, channel);
7917                         mutex_unlock(&priv->mutex);
7918                         return -EINVAL;
7919                 }
7920
7921                 /* Cancel any currently running scans... */
7922                 if (iwl3945_scan_cancel_timeout(priv, 100))
7923                         IWL_WARNING("Could not cancel scan.\n");
7924                 else {
7925                         IWL_DEBUG_INFO("Committing phymode and "
7926                                        "rxon.channel = %d %d\n",
7927                                        phymode, channel);
7928
7929                         iwl3945_set_rxon_channel(priv, phymode, channel);
7930                         iwl3945_set_flags_for_phymode(priv, phymode);
7931
7932                         iwl3945_set_rate(priv);
7933                         iwl3945_commit_rxon(priv);
7934                 }
7935         }
7936         mutex_unlock(&priv->mutex);
7937
7938         return count;
7939 }
7940
7941 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7942
7943 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7944
7945 static ssize_t show_measurement(struct device *d,
7946                                 struct device_attribute *attr, char *buf)
7947 {
7948         struct iwl3945_priv *priv = dev_get_drvdata(d);
7949         struct iwl3945_spectrum_notification measure_report;
7950         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7951         u8 *data = (u8 *) & measure_report;
7952         unsigned long flags;
7953
7954         spin_lock_irqsave(&priv->lock, flags);
7955         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7956                 spin_unlock_irqrestore(&priv->lock, flags);
7957                 return 0;
7958         }
7959         memcpy(&measure_report, &priv->measure_report, size);
7960         priv->measurement_status = 0;
7961         spin_unlock_irqrestore(&priv->lock, flags);
7962
7963         while (size && (PAGE_SIZE - len)) {
7964                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7965                                    PAGE_SIZE - len, 1);
7966                 len = strlen(buf);
7967                 if (PAGE_SIZE - len)
7968                         buf[len++] = '\n';
7969
7970                 ofs += 16;
7971                 size -= min(size, 16U);
7972         }
7973
7974         return len;
7975 }
7976
7977 static ssize_t store_measurement(struct device *d,
7978                                  struct device_attribute *attr,
7979                                  const char *buf, size_t count)
7980 {
7981         struct iwl3945_priv *priv = dev_get_drvdata(d);
7982         struct ieee80211_measurement_params params = {
7983                 .channel = le16_to_cpu(priv->active_rxon.channel),
7984                 .start_time = cpu_to_le64(priv->last_tsf),
7985                 .duration = cpu_to_le16(1),
7986         };
7987         u8 type = IWL_MEASURE_BASIC;
7988         u8 buffer[32];
7989         u8 channel;
7990
7991         if (count) {
7992                 char *p = buffer;
7993                 strncpy(buffer, buf, min(sizeof(buffer), count));
7994                 channel = simple_strtoul(p, NULL, 0);
7995                 if (channel)
7996                         params.channel = channel;
7997
7998                 p = buffer;
7999                 while (*p && *p != ' ')
8000                         p++;
8001                 if (*p)
8002                         type = simple_strtoul(p + 1, NULL, 0);
8003         }
8004
8005         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8006                        "channel %d (for '%s')\n", type, params.channel, buf);
8007         iwl3945_get_measurement(priv, &params, type);
8008
8009         return count;
8010 }
8011
8012 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8013                    show_measurement, store_measurement);
8014 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
8015
8016 static ssize_t show_rate(struct device *d,
8017                          struct device_attribute *attr, char *buf)
8018 {
8019         struct iwl3945_priv *priv = dev_get_drvdata(d);
8020         unsigned long flags;
8021         int i;
8022
8023         spin_lock_irqsave(&priv->sta_lock, flags);
8024         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
8025                 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
8026         else
8027                 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
8028         spin_unlock_irqrestore(&priv->sta_lock, flags);
8029
8030         i = iwl3945_rate_index_from_plcp(i);
8031         if (i == -1)
8032                 return sprintf(buf, "0\n");
8033
8034         return sprintf(buf, "%d%s\n",
8035                        (iwl3945_rates[i].ieee >> 1),
8036                        (iwl3945_rates[i].ieee & 0x1) ? ".5" : "");
8037 }
8038
8039 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
8040
8041 static ssize_t store_retry_rate(struct device *d,
8042                                 struct device_attribute *attr,
8043                                 const char *buf, size_t count)
8044 {
8045         struct iwl3945_priv *priv = dev_get_drvdata(d);
8046
8047         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8048         if (priv->retry_rate <= 0)
8049                 priv->retry_rate = 1;
8050
8051         return count;
8052 }
8053
8054 static ssize_t show_retry_rate(struct device *d,
8055                                struct device_attribute *attr, char *buf)
8056 {
8057         struct iwl3945_priv *priv = dev_get_drvdata(d);
8058         return sprintf(buf, "%d", priv->retry_rate);
8059 }
8060
8061 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8062                    store_retry_rate);
8063
8064 static ssize_t store_power_level(struct device *d,
8065                                  struct device_attribute *attr,
8066                                  const char *buf, size_t count)
8067 {
8068         struct iwl3945_priv *priv = dev_get_drvdata(d);
8069         int rc;
8070         int mode;
8071
8072         mode = simple_strtoul(buf, NULL, 0);
8073         mutex_lock(&priv->mutex);
8074
8075         if (!iwl3945_is_ready(priv)) {
8076                 rc = -EAGAIN;
8077                 goto out;
8078         }
8079
8080         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8081                 mode = IWL_POWER_AC;
8082         else
8083                 mode |= IWL_POWER_ENABLED;
8084
8085         if (mode != priv->power_mode) {
8086                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8087                 if (rc) {
8088                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8089                         goto out;
8090                 }
8091                 priv->power_mode = mode;
8092         }
8093
8094         rc = count;
8095
8096  out:
8097         mutex_unlock(&priv->mutex);
8098         return rc;
8099 }
8100
8101 #define MAX_WX_STRING 80
8102
8103 /* Values are in microsecond */
8104 static const s32 timeout_duration[] = {
8105         350000,
8106         250000,
8107         75000,
8108         37000,
8109         25000,
8110 };
8111 static const s32 period_duration[] = {
8112         400000,
8113         700000,
8114         1000000,
8115         1000000,
8116         1000000
8117 };
8118
8119 static ssize_t show_power_level(struct device *d,
8120                                 struct device_attribute *attr, char *buf)
8121 {
8122         struct iwl3945_priv *priv = dev_get_drvdata(d);
8123         int level = IWL_POWER_LEVEL(priv->power_mode);
8124         char *p = buf;
8125
8126         p += sprintf(p, "%d ", level);
8127         switch (level) {
8128         case IWL_POWER_MODE_CAM:
8129         case IWL_POWER_AC:
8130                 p += sprintf(p, "(AC)");
8131                 break;
8132         case IWL_POWER_BATTERY:
8133                 p += sprintf(p, "(BATTERY)");
8134                 break;
8135         default:
8136                 p += sprintf(p,
8137                              "(Timeout %dms, Period %dms)",
8138                              timeout_duration[level - 1] / 1000,
8139                              period_duration[level - 1] / 1000);
8140         }
8141
8142         if (!(priv->power_mode & IWL_POWER_ENABLED))
8143                 p += sprintf(p, " OFF\n");
8144         else
8145                 p += sprintf(p, " \n");
8146
8147         return (p - buf + 1);
8148
8149 }
8150
8151 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8152                    store_power_level);
8153
8154 static ssize_t show_channels(struct device *d,
8155                              struct device_attribute *attr, char *buf)
8156 {
8157         struct iwl3945_priv *priv = dev_get_drvdata(d);
8158         int len = 0, i;
8159         struct ieee80211_channel *channels = NULL;
8160         const struct ieee80211_hw_mode *hw_mode = NULL;
8161         int count = 0;
8162
8163         if (!iwl3945_is_ready(priv))
8164                 return -EAGAIN;
8165
8166         hw_mode = iwl3945_get_hw_mode(priv, MODE_IEEE80211G);
8167         if (!hw_mode)
8168                 hw_mode = iwl3945_get_hw_mode(priv, MODE_IEEE80211B);
8169         if (hw_mode) {
8170                 channels = hw_mode->channels;
8171                 count = hw_mode->num_channels;
8172         }
8173
8174         len +=
8175             sprintf(&buf[len],
8176                     "Displaying %d channels in 2.4GHz band "
8177                     "(802.11bg):\n", count);
8178
8179         for (i = 0; i < count; i++)
8180                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8181                                channels[i].chan,
8182                                channels[i].power_level,
8183                                channels[i].
8184                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8185                                " (IEEE 802.11h required)" : "",
8186                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8187                                 || (channels[i].
8188                                     flag &
8189                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8190                                ", IBSS",
8191                                channels[i].
8192                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8193                                "active/passive" : "passive only");
8194
8195         hw_mode = iwl3945_get_hw_mode(priv, MODE_IEEE80211A);
8196         if (hw_mode) {
8197                 channels = hw_mode->channels;
8198                 count = hw_mode->num_channels;
8199         } else {
8200                 channels = NULL;
8201                 count = 0;
8202         }
8203
8204         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8205                        "(802.11a):\n", count);
8206
8207         for (i = 0; i < count; i++)
8208                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8209                                channels[i].chan,
8210                                channels[i].power_level,
8211                                channels[i].
8212                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8213                                " (IEEE 802.11h required)" : "",
8214                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8215                                 || (channels[i].
8216                                     flag &
8217                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8218                                ", IBSS",
8219                                channels[i].
8220                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8221                                "active/passive" : "passive only");
8222
8223         return len;
8224 }
8225
8226 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8227
8228 static ssize_t show_statistics(struct device *d,
8229                                struct device_attribute *attr, char *buf)
8230 {
8231         struct iwl3945_priv *priv = dev_get_drvdata(d);
8232         u32 size = sizeof(struct iwl3945_notif_statistics);
8233         u32 len = 0, ofs = 0;
8234         u8 *data = (u8 *) & priv->statistics;
8235         int rc = 0;
8236
8237         if (!iwl3945_is_alive(priv))
8238                 return -EAGAIN;
8239
8240         mutex_lock(&priv->mutex);
8241         rc = iwl3945_send_statistics_request(priv);
8242         mutex_unlock(&priv->mutex);
8243
8244         if (rc) {
8245                 len = sprintf(buf,
8246                               "Error sending statistics request: 0x%08X\n", rc);
8247                 return len;
8248         }
8249
8250         while (size && (PAGE_SIZE - len)) {
8251                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8252                                    PAGE_SIZE - len, 1);
8253                 len = strlen(buf);
8254                 if (PAGE_SIZE - len)
8255                         buf[len++] = '\n';
8256
8257                 ofs += 16;
8258                 size -= min(size, 16U);
8259         }
8260
8261         return len;
8262 }
8263
8264 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8265
8266 static ssize_t show_antenna(struct device *d,
8267                             struct device_attribute *attr, char *buf)
8268 {
8269         struct iwl3945_priv *priv = dev_get_drvdata(d);
8270
8271         if (!iwl3945_is_alive(priv))
8272                 return -EAGAIN;
8273
8274         return sprintf(buf, "%d\n", priv->antenna);
8275 }
8276
8277 static ssize_t store_antenna(struct device *d,
8278                              struct device_attribute *attr,
8279                              const char *buf, size_t count)
8280 {
8281         int ant;
8282         struct iwl3945_priv *priv = dev_get_drvdata(d);
8283
8284         if (count == 0)
8285                 return 0;
8286
8287         if (sscanf(buf, "%1i", &ant) != 1) {
8288                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8289                 return count;
8290         }
8291
8292         if ((ant >= 0) && (ant <= 2)) {
8293                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8294                 priv->antenna = (enum iwl3945_antenna)ant;
8295         } else
8296                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8297
8298
8299         return count;
8300 }
8301
8302 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8303
8304 static ssize_t show_status(struct device *d,
8305                            struct device_attribute *attr, char *buf)
8306 {
8307         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
8308         if (!iwl3945_is_alive(priv))
8309                 return -EAGAIN;
8310         return sprintf(buf, "0x%08x\n", (int)priv->status);
8311 }
8312
8313 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8314
8315 static ssize_t dump_error_log(struct device *d,
8316                               struct device_attribute *attr,
8317                               const char *buf, size_t count)
8318 {
8319         char *p = (char *)buf;
8320
8321         if (p[0] == '1')
8322                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
8323
8324         return strnlen(buf, count);
8325 }
8326
8327 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8328
8329 static ssize_t dump_event_log(struct device *d,
8330                               struct device_attribute *attr,
8331                               const char *buf, size_t count)
8332 {
8333         char *p = (char *)buf;
8334
8335         if (p[0] == '1')
8336                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
8337
8338         return strnlen(buf, count);
8339 }
8340
8341 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8342
8343 /*****************************************************************************
8344  *
8345  * driver setup and teardown
8346  *
8347  *****************************************************************************/
8348
8349 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
8350 {
8351         priv->workqueue = create_workqueue(DRV_NAME);
8352
8353         init_waitqueue_head(&priv->wait_command_queue);
8354
8355         INIT_WORK(&priv->up, iwl3945_bg_up);
8356         INIT_WORK(&priv->restart, iwl3945_bg_restart);
8357         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
8358         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
8359         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
8360         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
8361         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
8362         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
8363         INIT_DELAYED_WORK(&priv->post_associate, iwl3945_bg_post_associate);
8364         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
8365         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
8366         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
8367
8368         iwl3945_hw_setup_deferred_work(priv);
8369
8370         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8371                      iwl3945_irq_tasklet, (unsigned long)priv);
8372 }
8373
8374 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
8375 {
8376         iwl3945_hw_cancel_deferred_work(priv);
8377
8378         cancel_delayed_work_sync(&priv->init_alive_start);
8379         cancel_delayed_work(&priv->scan_check);
8380         cancel_delayed_work(&priv->alive_start);
8381         cancel_delayed_work(&priv->post_associate);
8382         cancel_work_sync(&priv->beacon_update);
8383 }
8384
8385 static struct attribute *iwl3945_sysfs_entries[] = {
8386         &dev_attr_antenna.attr,
8387         &dev_attr_channels.attr,
8388         &dev_attr_dump_errors.attr,
8389         &dev_attr_dump_events.attr,
8390         &dev_attr_flags.attr,
8391         &dev_attr_filter_flags.attr,
8392 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
8393         &dev_attr_measurement.attr,
8394 #endif
8395         &dev_attr_power_level.attr,
8396         &dev_attr_rate.attr,
8397         &dev_attr_retry_rate.attr,
8398         &dev_attr_rf_kill.attr,
8399         &dev_attr_rs_window.attr,
8400         &dev_attr_statistics.attr,
8401         &dev_attr_status.attr,
8402         &dev_attr_temperature.attr,
8403         &dev_attr_tune.attr,
8404         &dev_attr_tx_power.attr,
8405
8406         NULL
8407 };
8408
8409 static struct attribute_group iwl3945_attribute_group = {
8410         .name = NULL,           /* put in device directory */
8411         .attrs = iwl3945_sysfs_entries,
8412 };
8413
8414 static struct ieee80211_ops iwl3945_hw_ops = {
8415         .tx = iwl3945_mac_tx,
8416         .start = iwl3945_mac_start,
8417         .stop = iwl3945_mac_stop,
8418         .add_interface = iwl3945_mac_add_interface,
8419         .remove_interface = iwl3945_mac_remove_interface,
8420         .config = iwl3945_mac_config,
8421         .config_interface = iwl3945_mac_config_interface,
8422         .configure_filter = iwl3945_configure_filter,
8423         .set_key = iwl3945_mac_set_key,
8424         .get_stats = iwl3945_mac_get_stats,
8425         .get_tx_stats = iwl3945_mac_get_tx_stats,
8426         .conf_tx = iwl3945_mac_conf_tx,
8427         .get_tsf = iwl3945_mac_get_tsf,
8428         .reset_tsf = iwl3945_mac_reset_tsf,
8429         .beacon_update = iwl3945_mac_beacon_update,
8430         .hw_scan = iwl3945_mac_hw_scan
8431 };
8432
8433 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8434 {
8435         int err = 0;
8436         u32 pci_id;
8437         struct iwl3945_priv *priv;
8438         struct ieee80211_hw *hw;
8439         int i;
8440         DECLARE_MAC_BUF(mac);
8441
8442         /* Disabling hardware scan means that mac80211 will perform scans
8443          * "the hard way", rather than using device's scan. */
8444         if (iwl3945_param_disable_hw_scan) {
8445                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8446                 iwl3945_hw_ops.hw_scan = NULL;
8447         }
8448
8449         if ((iwl3945_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8450             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8451                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8452                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8453                 err = -EINVAL;
8454                 goto out;
8455         }
8456
8457         /* mac80211 allocates memory for this device instance, including
8458          *   space for this driver's private structure */
8459         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
8460         if (hw == NULL) {
8461                 IWL_ERROR("Can not allocate network device\n");
8462                 err = -ENOMEM;
8463                 goto out;
8464         }
8465         SET_IEEE80211_DEV(hw, &pdev->dev);
8466
8467         hw->rate_control_algorithm = "iwl-3945-rs";
8468
8469         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8470         priv = hw->priv;
8471         priv->hw = hw;
8472
8473         priv->pci_dev = pdev;
8474
8475         /* Select antenna (may be helpful if only one antenna is connected) */
8476         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
8477 #ifdef CONFIG_IWL3945_DEBUG
8478         iwl3945_debug_level = iwl3945_param_debug;
8479         atomic_set(&priv->restrict_refcnt, 0);
8480 #endif
8481         priv->retry_rate = 1;
8482
8483         priv->ibss_beacon = NULL;
8484
8485         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8486          *   the range of signal quality values that we'll provide.
8487          * Negative values for level/noise indicate that we'll provide dBm.
8488          * For WE, at least, non-0 values here *enable* display of values
8489          *   in app (iwconfig). */
8490         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8491         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8492         hw->max_signal = 100;   /* link quality indication (%) */
8493
8494         /* Tell mac80211 our Tx characteristics */
8495         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8496
8497         /* 4 EDCA QOS priorities */
8498         hw->queues = 4;
8499
8500         spin_lock_init(&priv->lock);
8501         spin_lock_init(&priv->power_data.lock);
8502         spin_lock_init(&priv->sta_lock);
8503         spin_lock_init(&priv->hcmd_lock);
8504
8505         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8506                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8507
8508         INIT_LIST_HEAD(&priv->free_frames);
8509
8510         mutex_init(&priv->mutex);
8511         if (pci_enable_device(pdev)) {
8512                 err = -ENODEV;
8513                 goto out_ieee80211_free_hw;
8514         }
8515
8516         pci_set_master(pdev);
8517
8518         /* Clear the driver's (not device's) station table */
8519         iwl3945_clear_stations_table(priv);
8520
8521         priv->data_retry_limit = -1;
8522         priv->ieee_channels = NULL;
8523         priv->ieee_rates = NULL;
8524         priv->phymode = -1;
8525
8526         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8527         if (!err)
8528                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8529         if (err) {
8530                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8531                 goto out_pci_disable_device;
8532         }
8533
8534         pci_set_drvdata(pdev, priv);
8535         err = pci_request_regions(pdev, DRV_NAME);
8536         if (err)
8537                 goto out_pci_disable_device;
8538
8539         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8540          * PCI Tx retries from interfering with C3 CPU state */
8541         pci_write_config_byte(pdev, 0x41, 0x00);
8542
8543         priv->hw_base = pci_iomap(pdev, 0, 0);
8544         if (!priv->hw_base) {
8545                 err = -ENODEV;
8546                 goto out_pci_release_regions;
8547         }
8548
8549         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8550                         (unsigned long long) pci_resource_len(pdev, 0));
8551         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8552
8553         /* Initialize module parameter values here */
8554
8555         /* Disable radio (SW RF KILL) via parameter when loading driver */
8556         if (iwl3945_param_disable) {
8557                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8558                 IWL_DEBUG_INFO("Radio disabled.\n");
8559         }
8560
8561         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8562
8563         pci_id =
8564             (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8565
8566         switch (pci_id) {
8567         case 0x42221005:        /* 0x4222 0x8086 0x1005 is BG SKU */
8568         case 0x42221034:        /* 0x4222 0x8086 0x1034 is BG SKU */
8569         case 0x42271014:        /* 0x4227 0x8086 0x1014 is BG SKU */
8570         case 0x42221044:        /* 0x4222 0x8086 0x1044 is BG SKU */
8571                 priv->is_abg = 0;
8572                 break;
8573
8574         /*
8575          * Rest are assumed ABG SKU -- if this is not the
8576          * case then the card will get the wrong 'Detected'
8577          * line in the kernel log however the code that
8578          * initializes the GEO table will detect no A-band
8579          * channels and remove the is_abg mask.
8580          */
8581         default:
8582                 priv->is_abg = 1;
8583                 break;
8584         }
8585
8586         printk(KERN_INFO DRV_NAME
8587                ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8588                priv->is_abg ? "A" : "");
8589
8590         /* Device-specific setup */
8591         if (iwl3945_hw_set_hw_setting(priv)) {
8592                 IWL_ERROR("failed to set hw settings\n");
8593                 goto out_iounmap;
8594         }
8595
8596 #ifdef CONFIG_IWL3945_QOS
8597         if (iwl3945_param_qos_enable)
8598                 priv->qos_data.qos_enable = 1;
8599
8600         iwl3945_reset_qos(priv);
8601
8602         priv->qos_data.qos_active = 0;
8603         priv->qos_data.qos_cap.val = 0;
8604 #endif /* CONFIG_IWL3945_QOS */
8605
8606         iwl3945_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8607         iwl3945_setup_deferred_work(priv);
8608         iwl3945_setup_rx_handlers(priv);
8609
8610         priv->rates_mask = IWL_RATES_MASK;
8611         /* If power management is turned on, default to AC mode */
8612         priv->power_mode = IWL_POWER_AC;
8613         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8614
8615         iwl3945_disable_interrupts(priv);
8616
8617         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8618         if (err) {
8619                 IWL_ERROR("failed to create sysfs device attributes\n");
8620                 goto out_release_irq;
8621         }
8622
8623         /* nic init */
8624         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8625                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8626
8627         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8628         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
8629                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8630                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8631         if (err < 0) {
8632                 IWL_DEBUG_INFO("Failed to init the card\n");
8633                 goto out_remove_sysfs;
8634         }
8635         /* Read the EEPROM */
8636         err = iwl3945_eeprom_init(priv);
8637         if (err) {
8638                 IWL_ERROR("Unable to init EEPROM\n");
8639                 goto out_remove_sysfs;
8640         }
8641         /* MAC Address location in EEPROM same for 3945/4965 */
8642         get_eeprom_mac(priv, priv->mac_addr);
8643         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8644         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8645
8646         err = iwl3945_init_channel_map(priv);
8647         if (err) {
8648                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8649                 goto out_remove_sysfs;
8650         }
8651
8652         err = iwl3945_init_geos(priv);
8653         if (err) {
8654                 IWL_ERROR("initializing geos failed: %d\n", err);
8655                 goto out_free_channel_map;
8656         }
8657         iwl3945_reset_channel_flag(priv);
8658
8659         iwl3945_rate_control_register(priv->hw);
8660         err = ieee80211_register_hw(priv->hw);
8661         if (err) {
8662                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8663                 goto out_free_geos;
8664         }
8665
8666         priv->hw->conf.beacon_int = 100;
8667         priv->mac80211_registered = 1;
8668         pci_save_state(pdev);
8669         pci_disable_device(pdev);
8670
8671         return 0;
8672
8673  out_free_geos:
8674         iwl3945_free_geos(priv);
8675  out_free_channel_map:
8676         iwl3945_free_channel_map(priv);
8677  out_remove_sysfs:
8678         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8679
8680  out_release_irq:
8681         destroy_workqueue(priv->workqueue);
8682         priv->workqueue = NULL;
8683         iwl3945_unset_hw_setting(priv);
8684
8685  out_iounmap:
8686         pci_iounmap(pdev, priv->hw_base);
8687  out_pci_release_regions:
8688         pci_release_regions(pdev);
8689  out_pci_disable_device:
8690         pci_disable_device(pdev);
8691         pci_set_drvdata(pdev, NULL);
8692  out_ieee80211_free_hw:
8693         ieee80211_free_hw(priv->hw);
8694  out:
8695         return err;
8696 }
8697
8698 static void iwl3945_pci_remove(struct pci_dev *pdev)
8699 {
8700         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8701         struct list_head *p, *q;
8702         int i;
8703
8704         if (!priv)
8705                 return;
8706
8707         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8708
8709         set_bit(STATUS_EXIT_PENDING, &priv->status);
8710
8711         iwl3945_down(priv);
8712
8713         /* Free MAC hash list for ADHOC */
8714         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8715                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8716                         list_del(p);
8717                         kfree(list_entry(p, struct iwl3945_ibss_seq, list));
8718                 }
8719         }
8720
8721         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8722
8723         iwl3945_dealloc_ucode_pci(priv);
8724
8725         if (priv->rxq.bd)
8726                 iwl3945_rx_queue_free(priv, &priv->rxq);
8727         iwl3945_hw_txq_ctx_free(priv);
8728
8729         iwl3945_unset_hw_setting(priv);
8730         iwl3945_clear_stations_table(priv);
8731
8732         if (priv->mac80211_registered) {
8733                 ieee80211_unregister_hw(priv->hw);
8734                 iwl3945_rate_control_unregister(priv->hw);
8735         }
8736
8737         /*netif_stop_queue(dev); */
8738         flush_workqueue(priv->workqueue);
8739
8740         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8741          * priv->workqueue... so we can't take down the workqueue
8742          * until now... */
8743         destroy_workqueue(priv->workqueue);
8744         priv->workqueue = NULL;
8745
8746         pci_iounmap(pdev, priv->hw_base);
8747         pci_release_regions(pdev);
8748         pci_disable_device(pdev);
8749         pci_set_drvdata(pdev, NULL);
8750
8751         iwl3945_free_channel_map(priv);
8752         iwl3945_free_geos(priv);
8753
8754         if (priv->ibss_beacon)
8755                 dev_kfree_skb(priv->ibss_beacon);
8756
8757         ieee80211_free_hw(priv->hw);
8758 }
8759
8760 #ifdef CONFIG_PM
8761
8762 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8763 {
8764         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8765
8766         if (priv->is_open) {
8767                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8768                 iwl3945_mac_stop(priv->hw);
8769                 priv->is_open = 1;
8770         }
8771
8772         pci_set_power_state(pdev, PCI_D3hot);
8773
8774         return 0;
8775 }
8776
8777 static int iwl3945_pci_resume(struct pci_dev *pdev)
8778 {
8779         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8780
8781         pci_set_power_state(pdev, PCI_D0);
8782
8783         if (priv->is_open)
8784                 iwl3945_mac_start(priv->hw);
8785
8786         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8787         return 0;
8788 }
8789
8790 #endif /* CONFIG_PM */
8791
8792 /*****************************************************************************
8793  *
8794  * driver and module entry point
8795  *
8796  *****************************************************************************/
8797
8798 static struct pci_driver iwl3945_driver = {
8799         .name = DRV_NAME,
8800         .id_table = iwl3945_hw_card_ids,
8801         .probe = iwl3945_pci_probe,
8802         .remove = __devexit_p(iwl3945_pci_remove),
8803 #ifdef CONFIG_PM
8804         .suspend = iwl3945_pci_suspend,
8805         .resume = iwl3945_pci_resume,
8806 #endif
8807 };
8808
8809 static int __init iwl3945_init(void)
8810 {
8811
8812         int ret;
8813         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8814         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8815         ret = pci_register_driver(&iwl3945_driver);
8816         if (ret) {
8817                 IWL_ERROR("Unable to initialize PCI module\n");
8818                 return ret;
8819         }
8820 #ifdef CONFIG_IWL3945_DEBUG
8821         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8822         if (ret) {
8823                 IWL_ERROR("Unable to create driver sysfs file\n");
8824                 pci_unregister_driver(&iwl3945_driver);
8825                 return ret;
8826         }
8827 #endif
8828
8829         return ret;
8830 }
8831
8832 static void __exit iwl3945_exit(void)
8833 {
8834 #ifdef CONFIG_IWL3945_DEBUG
8835         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8836 #endif
8837         pci_unregister_driver(&iwl3945_driver);
8838 }
8839
8840 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8841 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8842 module_param_named(disable, iwl3945_param_disable, int, 0444);
8843 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8844 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8845 MODULE_PARM_DESC(hwcrypto,
8846                  "using hardware crypto engine (default 0 [software])\n");
8847 module_param_named(debug, iwl3945_param_debug, int, 0444);
8848 MODULE_PARM_DESC(debug, "debug output mask");
8849 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8850 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8851
8852 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8853 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8854
8855 /* QoS */
8856 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8857 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8858
8859 module_exit(iwl3945_exit);
8860 module_init(iwl3945_init);