d0d1b7f4c3960ca3e4034779390333a15cedc404
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2009 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  *  Intel Linux Wireless <ilw@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/init.h>
33 #include <linux/pci.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/delay.h>
36 #include <linux/skbuff.h>
37 #include <linux/netdevice.h>
38 #include <linux/wireless.h>
39 #include <linux/firmware.h>
40 #include <linux/etherdevice.h>
41 #include <linux/if_arp.h>
42
43 #include <net/ieee80211_radiotap.h>
44 #include <net/mac80211.h>
45
46 #include <asm/div64.h>
47
48 #define DRV_NAME        "iwl3945"
49
50 #include "iwl-fh.h"
51 #include "iwl-3945-fh.h"
52 #include "iwl-commands.h"
53 #include "iwl-sta.h"
54 #include "iwl-3945.h"
55 #include "iwl-helpers.h"
56 #include "iwl-core.h"
57 #include "iwl-dev.h"
58
59 /*
60  * module name, copyright, version, etc.
61  */
62
63 #define DRV_DESCRIPTION \
64 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
65
66 #ifdef CONFIG_IWLWIFI_DEBUG
67 #define VD "d"
68 #else
69 #define VD
70 #endif
71
72 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
73 #define VS "s"
74 #else
75 #define VS
76 #endif
77
78 #define IWL39_VERSION "1.2.26k" VD VS
79 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
80 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
81 #define DRV_VERSION     IWL39_VERSION
82
83
84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
85 MODULE_VERSION(DRV_VERSION);
86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
87 MODULE_LICENSE("GPL");
88
89  /* module parameters */
90 struct iwl_mod_params iwl3945_mod_params = {
91         .num_of_queues = IWL39_NUM_QUEUES, /* Not used */
92         .sw_crypto = 1,
93         .restart_fw = 1,
94         /* the rest are 0 by default */
95 };
96
97 /**
98  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
99  * @priv: eeprom and antenna fields are used to determine antenna flags
100  *
101  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
102  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
103  *
104  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
105  * IWL_ANTENNA_MAIN      - Force MAIN antenna
106  * IWL_ANTENNA_AUX       - Force AUX antenna
107  */
108 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
109 {
110         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
111
112         switch (iwl3945_mod_params.antenna) {
113         case IWL_ANTENNA_DIVERSITY:
114                 return 0;
115
116         case IWL_ANTENNA_MAIN:
117                 if (eeprom->antenna_switch_type)
118                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
119                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
120
121         case IWL_ANTENNA_AUX:
122                 if (eeprom->antenna_switch_type)
123                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
124                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
125         }
126
127         /* bad antenna selector value */
128         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
129                 iwl3945_mod_params.antenna);
130
131         return 0;               /* "diversity" is default if error */
132 }
133
134 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
135                                    struct ieee80211_key_conf *keyconf,
136                                    u8 sta_id)
137 {
138         unsigned long flags;
139         __le16 key_flags = 0;
140         int ret;
141
142         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
143         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
144
145         if (sta_id == priv->hw_params.bcast_sta_id)
146                 key_flags |= STA_KEY_MULTICAST_MSK;
147
148         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
149         keyconf->hw_key_idx = keyconf->keyidx;
150         key_flags &= ~STA_KEY_FLG_INVALID;
151
152         spin_lock_irqsave(&priv->sta_lock, flags);
153         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
154         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
155         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
156                keyconf->keylen);
157
158         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
159                keyconf->keylen);
160
161         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
162                         == STA_KEY_FLG_NO_ENC)
163                 priv->stations[sta_id].sta.key.key_offset =
164                                  iwl_get_free_ucode_key_index(priv);
165         /* else, we are overriding an existing key => no need to allocated room
166         * in uCode. */
167
168         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
169                 "no space for a new key");
170
171         priv->stations[sta_id].sta.key.key_flags = key_flags;
172         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
173         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
174
175         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
176
177         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
178
179         spin_unlock_irqrestore(&priv->sta_lock, flags);
180
181         return ret;
182 }
183
184 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
185                                   struct ieee80211_key_conf *keyconf,
186                                   u8 sta_id)
187 {
188         return -EOPNOTSUPP;
189 }
190
191 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
192                                   struct ieee80211_key_conf *keyconf,
193                                   u8 sta_id)
194 {
195         return -EOPNOTSUPP;
196 }
197
198 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
199 {
200         unsigned long flags;
201
202         spin_lock_irqsave(&priv->sta_lock, flags);
203         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
204         memset(&priv->stations[sta_id].sta.key, 0,
205                 sizeof(struct iwl4965_keyinfo));
206         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
207         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
208         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
209         spin_unlock_irqrestore(&priv->sta_lock, flags);
210
211         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
212         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
213         return 0;
214 }
215
216 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
217                         struct ieee80211_key_conf *keyconf, u8 sta_id)
218 {
219         int ret = 0;
220
221         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
222
223         switch (keyconf->alg) {
224         case ALG_CCMP:
225                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
226                 break;
227         case ALG_TKIP:
228                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
229                 break;
230         case ALG_WEP:
231                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
232                 break;
233         default:
234                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
235                 ret = -EINVAL;
236         }
237
238         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
239                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
240                       sta_id, ret);
241
242         return ret;
243 }
244
245 static int iwl3945_remove_static_key(struct iwl_priv *priv)
246 {
247         int ret = -EOPNOTSUPP;
248
249         return ret;
250 }
251
252 static int iwl3945_set_static_key(struct iwl_priv *priv,
253                                 struct ieee80211_key_conf *key)
254 {
255         if (key->alg == ALG_WEP)
256                 return -EOPNOTSUPP;
257
258         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
259         return -EINVAL;
260 }
261
262 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
263 {
264         struct list_head *element;
265
266         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
267                        priv->frames_count);
268
269         while (!list_empty(&priv->free_frames)) {
270                 element = priv->free_frames.next;
271                 list_del(element);
272                 kfree(list_entry(element, struct iwl3945_frame, list));
273                 priv->frames_count--;
274         }
275
276         if (priv->frames_count) {
277                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
278                             priv->frames_count);
279                 priv->frames_count = 0;
280         }
281 }
282
283 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
284 {
285         struct iwl3945_frame *frame;
286         struct list_head *element;
287         if (list_empty(&priv->free_frames)) {
288                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
289                 if (!frame) {
290                         IWL_ERR(priv, "Could not allocate frame!\n");
291                         return NULL;
292                 }
293
294                 priv->frames_count++;
295                 return frame;
296         }
297
298         element = priv->free_frames.next;
299         list_del(element);
300         return list_entry(element, struct iwl3945_frame, list);
301 }
302
303 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
304 {
305         memset(frame, 0, sizeof(*frame));
306         list_add(&frame->list, &priv->free_frames);
307 }
308
309 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
310                                 struct ieee80211_hdr *hdr,
311                                 int left)
312 {
313
314         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
315             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
316              (priv->iw_mode != NL80211_IFTYPE_AP)))
317                 return 0;
318
319         if (priv->ibss_beacon->len > left)
320                 return 0;
321
322         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
323
324         return priv->ibss_beacon->len;
325 }
326
327 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
328 {
329         struct iwl3945_frame *frame;
330         unsigned int frame_size;
331         int rc;
332         u8 rate;
333
334         frame = iwl3945_get_free_frame(priv);
335
336         if (!frame) {
337                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
338                           "command.\n");
339                 return -ENOMEM;
340         }
341
342         rate = iwl_rate_get_lowest_plcp(priv);
343
344         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
345
346         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
347                               &frame->u.cmd[0]);
348
349         iwl3945_free_frame(priv, frame);
350
351         return rc;
352 }
353
354 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
355 {
356         if (priv->shared_virt)
357                 pci_free_consistent(priv->pci_dev,
358                                     sizeof(struct iwl3945_shared),
359                                     priv->shared_virt,
360                                     priv->shared_phys);
361 }
362
363 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
364                                       struct ieee80211_tx_info *info,
365                                       struct iwl_device_cmd *cmd,
366                                       struct sk_buff *skb_frag,
367                                       int sta_id)
368 {
369         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
370         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
371
372         switch (keyinfo->alg) {
373         case ALG_CCMP:
374                 tx->sec_ctl = TX_CMD_SEC_CCM;
375                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
376                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
377                 break;
378
379         case ALG_TKIP:
380                 break;
381
382         case ALG_WEP:
383                 tx->sec_ctl = TX_CMD_SEC_WEP |
384                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
385
386                 if (keyinfo->keylen == 13)
387                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
388
389                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
390
391                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
392                              "with key %d\n", info->control.hw_key->hw_key_idx);
393                 break;
394
395         default:
396                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
397                 break;
398         }
399 }
400
401 /*
402  * handle build REPLY_TX command notification.
403  */
404 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
405                                   struct iwl_device_cmd *cmd,
406                                   struct ieee80211_tx_info *info,
407                                   struct ieee80211_hdr *hdr, u8 std_id)
408 {
409         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
410         __le32 tx_flags = tx->tx_flags;
411         __le16 fc = hdr->frame_control;
412         u8 rc_flags = info->control.rates[0].flags;
413
414         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
415         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
416                 tx_flags |= TX_CMD_FLG_ACK_MSK;
417                 if (ieee80211_is_mgmt(fc))
418                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
419                 if (ieee80211_is_probe_resp(fc) &&
420                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
421                         tx_flags |= TX_CMD_FLG_TSF_MSK;
422         } else {
423                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
424                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
425         }
426
427         tx->sta_id = std_id;
428         if (ieee80211_has_morefrags(fc))
429                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
430
431         if (ieee80211_is_data_qos(fc)) {
432                 u8 *qc = ieee80211_get_qos_ctl(hdr);
433                 tx->tid_tspec = qc[0] & 0xf;
434                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
435         } else {
436                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
437         }
438
439         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
440                 tx_flags |= TX_CMD_FLG_RTS_MSK;
441                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
442         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
443                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
444                 tx_flags |= TX_CMD_FLG_CTS_MSK;
445         }
446
447         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
448                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
449
450         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
451         if (ieee80211_is_mgmt(fc)) {
452                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
453                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
454                 else
455                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
456         } else {
457                 tx->timeout.pm_frame_timeout = 0;
458 #ifdef CONFIG_IWLWIFI_LEDS
459                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
460 #endif
461         }
462
463         tx->driver_txop = 0;
464         tx->tx_flags = tx_flags;
465         tx->next_frame_len = 0;
466 }
467
468 /*
469  * start REPLY_TX command process
470  */
471 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
472 {
473         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
474         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
475         struct iwl3945_tx_cmd *tx;
476         struct iwl_tx_queue *txq = NULL;
477         struct iwl_queue *q = NULL;
478         struct iwl_device_cmd *out_cmd;
479         struct iwl_cmd_meta *out_meta;
480         dma_addr_t phys_addr;
481         dma_addr_t txcmd_phys;
482         int txq_id = skb_get_queue_mapping(skb);
483         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
484         u8 id;
485         u8 unicast;
486         u8 sta_id;
487         u8 tid = 0;
488         u16 seq_number = 0;
489         __le16 fc;
490         u8 wait_write_ptr = 0;
491         u8 *qc = NULL;
492         unsigned long flags;
493         int rc;
494
495         spin_lock_irqsave(&priv->lock, flags);
496         if (iwl_is_rfkill(priv)) {
497                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
498                 goto drop_unlock;
499         }
500
501         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
502                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
503                 goto drop_unlock;
504         }
505
506         unicast = !is_multicast_ether_addr(hdr->addr1);
507         id = 0;
508
509         fc = hdr->frame_control;
510
511 #ifdef CONFIG_IWLWIFI_DEBUG
512         if (ieee80211_is_auth(fc))
513                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
514         else if (ieee80211_is_assoc_req(fc))
515                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
516         else if (ieee80211_is_reassoc_req(fc))
517                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
518 #endif
519
520         /* drop all non-injected data frame if we are not associated */
521         if (ieee80211_is_data(fc) &&
522             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
523             (!iwl_is_associated(priv) ||
524              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
525                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
526                 goto drop_unlock;
527         }
528
529         spin_unlock_irqrestore(&priv->lock, flags);
530
531         hdr_len = ieee80211_hdrlen(fc);
532
533         /* Find (or create) index into station table for destination station */
534         if (info->flags & IEEE80211_TX_CTL_INJECTED)
535                 sta_id = priv->hw_params.bcast_sta_id;
536         else
537                 sta_id = iwl_get_sta_id(priv, hdr);
538         if (sta_id == IWL_INVALID_STATION) {
539                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
540                                hdr->addr1);
541                 goto drop;
542         }
543
544         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
545
546         if (ieee80211_is_data_qos(fc)) {
547                 qc = ieee80211_get_qos_ctl(hdr);
548                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
549                 if (unlikely(tid >= MAX_TID_COUNT))
550                         goto drop;
551                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
552                                 IEEE80211_SCTL_SEQ;
553                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
554                         (hdr->seq_ctrl &
555                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
556                 seq_number += 0x10;
557         }
558
559         /* Descriptor for chosen Tx queue */
560         txq = &priv->txq[txq_id];
561         q = &txq->q;
562
563         spin_lock_irqsave(&priv->lock, flags);
564
565         idx = get_cmd_index(q, q->write_ptr, 0);
566
567         /* Set up driver data for this TFD */
568         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
569         txq->txb[q->write_ptr].skb[0] = skb;
570
571         /* Init first empty entry in queue's array of Tx/cmd buffers */
572         out_cmd = txq->cmd[idx];
573         out_meta = &txq->meta[idx];
574         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
575         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
576         memset(tx, 0, sizeof(*tx));
577
578         /*
579          * Set up the Tx-command (not MAC!) header.
580          * Store the chosen Tx queue and TFD index within the sequence field;
581          * after Tx, uCode's Tx response will return this value so driver can
582          * locate the frame within the tx queue and do post-tx processing.
583          */
584         out_cmd->hdr.cmd = REPLY_TX;
585         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
586                                 INDEX_TO_SEQ(q->write_ptr)));
587
588         /* Copy MAC header from skb into command buffer */
589         memcpy(tx->hdr, hdr, hdr_len);
590
591
592         if (info->control.hw_key)
593                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
594
595         /* TODO need this for burst mode later on */
596         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
597
598         /* set is_hcca to 0; it probably will never be implemented */
599         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
600
601         /* Total # bytes to be transmitted */
602         len = (u16)skb->len;
603         tx->len = cpu_to_le16(len);
604
605         iwl_dbg_log_tx_data_frame(priv, len, hdr);
606         iwl_update_stats(priv, true, fc, len);
607         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
608         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
609
610         if (!ieee80211_has_morefrags(hdr->frame_control)) {
611                 txq->need_update = 1;
612                 if (qc)
613                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
614         } else {
615                 wait_write_ptr = 1;
616                 txq->need_update = 0;
617         }
618
619         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
620                      le16_to_cpu(out_cmd->hdr.sequence));
621         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
622         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
623         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
624                            ieee80211_hdrlen(fc));
625
626         /*
627          * Use the first empty entry in this queue's command buffer array
628          * to contain the Tx command and MAC header concatenated together
629          * (payload data will be in another buffer).
630          * Size of this varies, due to varying MAC header length.
631          * If end is not dword aligned, we'll have 2 extra bytes at the end
632          * of the MAC header (device reads on dword boundaries).
633          * We'll tell device about this padding later.
634          */
635         len = sizeof(struct iwl3945_tx_cmd) +
636                         sizeof(struct iwl_cmd_header) + hdr_len;
637
638         len_org = len;
639         len = (len + 3) & ~3;
640
641         if (len_org != len)
642                 len_org = 1;
643         else
644                 len_org = 0;
645
646         /* Physical address of this Tx command's header (not MAC header!),
647          * within command buffer array. */
648         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
649                                     len, PCI_DMA_TODEVICE);
650         /* we do not map meta data ... so we can safely access address to
651          * provide to unmap command*/
652         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
653         pci_unmap_len_set(out_meta, len, len);
654
655         /* Add buffer containing Tx command and MAC(!) header to TFD's
656          * first entry */
657         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
658                                                    txcmd_phys, len, 1, 0);
659
660
661         /* Set up TFD's 2nd entry to point directly to remainder of skb,
662          * if any (802.11 null frames have no payload). */
663         len = skb->len - hdr_len;
664         if (len) {
665                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
666                                            len, PCI_DMA_TODEVICE);
667                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
668                                                            phys_addr, len,
669                                                            0, U32_PAD(len));
670         }
671
672
673         /* Tell device the write index *just past* this latest filled TFD */
674         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
675         rc = iwl_txq_update_write_ptr(priv, txq);
676         spin_unlock_irqrestore(&priv->lock, flags);
677
678         if (rc)
679                 return rc;
680
681         if ((iwl_queue_space(q) < q->high_mark)
682             && priv->mac80211_registered) {
683                 if (wait_write_ptr) {
684                         spin_lock_irqsave(&priv->lock, flags);
685                         txq->need_update = 1;
686                         iwl_txq_update_write_ptr(priv, txq);
687                         spin_unlock_irqrestore(&priv->lock, flags);
688                 }
689
690                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
691         }
692
693         return 0;
694
695 drop_unlock:
696         spin_unlock_irqrestore(&priv->lock, flags);
697 drop:
698         return -1;
699 }
700
701 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
702
703 #include "iwl-spectrum.h"
704
705 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
706 #define BEACON_TIME_MASK_HIGH   0xFF000000
707 #define TIME_UNIT               1024
708
709 /*
710  * extended beacon time format
711  * time in usec will be changed into a 32-bit value in 8:24 format
712  * the high 1 byte is the beacon counts
713  * the lower 3 bytes is the time in usec within one beacon interval
714  */
715
716 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
717 {
718         u32 quot;
719         u32 rem;
720         u32 interval = beacon_interval * 1024;
721
722         if (!interval || !usec)
723                 return 0;
724
725         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
726         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
727
728         return (quot << 24) + rem;
729 }
730
731 /* base is usually what we get from ucode with each received frame,
732  * the same as HW timer counter counting down
733  */
734
735 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
736 {
737         u32 base_low = base & BEACON_TIME_MASK_LOW;
738         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
739         u32 interval = beacon_interval * TIME_UNIT;
740         u32 res = (base & BEACON_TIME_MASK_HIGH) +
741             (addon & BEACON_TIME_MASK_HIGH);
742
743         if (base_low > addon_low)
744                 res += base_low - addon_low;
745         else if (base_low < addon_low) {
746                 res += interval + base_low - addon_low;
747                 res += (1 << 24);
748         } else
749                 res += (1 << 24);
750
751         return cpu_to_le32(res);
752 }
753
754 static int iwl3945_get_measurement(struct iwl_priv *priv,
755                                struct ieee80211_measurement_params *params,
756                                u8 type)
757 {
758         struct iwl_spectrum_cmd spectrum;
759         struct iwl_rx_packet *res;
760         struct iwl_host_cmd cmd = {
761                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
762                 .data = (void *)&spectrum,
763                 .flags = CMD_WANT_SKB,
764         };
765         u32 add_time = le64_to_cpu(params->start_time);
766         int rc;
767         int spectrum_resp_status;
768         int duration = le16_to_cpu(params->duration);
769
770         if (iwl_is_associated(priv))
771                 add_time =
772                     iwl3945_usecs_to_beacons(
773                         le64_to_cpu(params->start_time) - priv->last_tsf,
774                         le16_to_cpu(priv->rxon_timing.beacon_interval));
775
776         memset(&spectrum, 0, sizeof(spectrum));
777
778         spectrum.channel_count = cpu_to_le16(1);
779         spectrum.flags =
780             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
781         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
782         cmd.len = sizeof(spectrum);
783         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
784
785         if (iwl_is_associated(priv))
786                 spectrum.start_time =
787                     iwl3945_add_beacon_time(priv->last_beacon_time,
788                                 add_time,
789                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
790         else
791                 spectrum.start_time = 0;
792
793         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
794         spectrum.channels[0].channel = params->channel;
795         spectrum.channels[0].type = type;
796         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
797                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
798                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
799
800         rc = iwl_send_cmd_sync(priv, &cmd);
801         if (rc)
802                 return rc;
803
804         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
805         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
806                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
807                 rc = -EIO;
808         }
809
810         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
811         switch (spectrum_resp_status) {
812         case 0:         /* Command will be handled */
813                 if (res->u.spectrum.id != 0xff) {
814                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
815                                                 res->u.spectrum.id);
816                         priv->measurement_status &= ~MEASUREMENT_READY;
817                 }
818                 priv->measurement_status |= MEASUREMENT_ACTIVE;
819                 rc = 0;
820                 break;
821
822         case 1:         /* Command will not be handled */
823                 rc = -EAGAIN;
824                 break;
825         }
826
827         dev_kfree_skb_any(cmd.reply_skb);
828
829         return rc;
830 }
831 #endif
832
833 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
834                                struct iwl_rx_mem_buffer *rxb)
835 {
836         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
837         struct iwl_alive_resp *palive;
838         struct delayed_work *pwork;
839
840         palive = &pkt->u.alive_frame;
841
842         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
843                        "0x%01X 0x%01X\n",
844                        palive->is_valid, palive->ver_type,
845                        palive->ver_subtype);
846
847         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
848                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
849                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
850                        sizeof(struct iwl_alive_resp));
851                 pwork = &priv->init_alive_start;
852         } else {
853                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
854                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
855                        sizeof(struct iwl_alive_resp));
856                 pwork = &priv->alive_start;
857                 iwl3945_disable_events(priv);
858         }
859
860         /* We delay the ALIVE response by 5ms to
861          * give the HW RF Kill time to activate... */
862         if (palive->is_valid == UCODE_VALID_OK)
863                 queue_delayed_work(priv->workqueue, pwork,
864                                    msecs_to_jiffies(5));
865         else
866                 IWL_WARN(priv, "uCode did not respond OK.\n");
867 }
868
869 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
870                                  struct iwl_rx_mem_buffer *rxb)
871 {
872 #ifdef CONFIG_IWLWIFI_DEBUG
873         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
874 #endif
875
876         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
877         return;
878 }
879
880 static void iwl3945_bg_beacon_update(struct work_struct *work)
881 {
882         struct iwl_priv *priv =
883                 container_of(work, struct iwl_priv, beacon_update);
884         struct sk_buff *beacon;
885
886         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
887         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
888
889         if (!beacon) {
890                 IWL_ERR(priv, "update beacon failed\n");
891                 return;
892         }
893
894         mutex_lock(&priv->mutex);
895         /* new beacon skb is allocated every time; dispose previous.*/
896         if (priv->ibss_beacon)
897                 dev_kfree_skb(priv->ibss_beacon);
898
899         priv->ibss_beacon = beacon;
900         mutex_unlock(&priv->mutex);
901
902         iwl3945_send_beacon_cmd(priv);
903 }
904
905 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
906                                 struct iwl_rx_mem_buffer *rxb)
907 {
908 #ifdef CONFIG_IWLWIFI_DEBUG
909         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
910         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
911         u8 rate = beacon->beacon_notify_hdr.rate;
912
913         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
914                 "tsf %d %d rate %d\n",
915                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
916                 beacon->beacon_notify_hdr.failure_frame,
917                 le32_to_cpu(beacon->ibss_mgr_status),
918                 le32_to_cpu(beacon->high_tsf),
919                 le32_to_cpu(beacon->low_tsf), rate);
920 #endif
921
922         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
923             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
924                 queue_work(priv->workqueue, &priv->beacon_update);
925 }
926
927 /* Handle notification from uCode that card's power state is changing
928  * due to software, hardware, or critical temperature RFKILL */
929 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
930                                     struct iwl_rx_mem_buffer *rxb)
931 {
932         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
933         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
934         unsigned long status = priv->status;
935
936         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
937                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
938                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
939
940         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
941                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
942
943         if (flags & HW_CARD_DISABLED)
944                 set_bit(STATUS_RF_KILL_HW, &priv->status);
945         else
946                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
947
948
949         iwl_scan_cancel(priv);
950
951         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
952              test_bit(STATUS_RF_KILL_HW, &priv->status)))
953                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
954                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
955         else
956                 wake_up_interruptible(&priv->wait_command_queue);
957 }
958
959 /**
960  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
961  *
962  * Setup the RX handlers for each of the reply types sent from the uCode
963  * to the host.
964  *
965  * This function chains into the hardware specific files for them to setup
966  * any hardware specific handlers as well.
967  */
968 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
969 {
970         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
971         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
972         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
973         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
974         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
975         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
976             iwl_rx_pm_debug_statistics_notif;
977         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
978
979         /*
980          * The same handler is used for both the REPLY to a discrete
981          * statistics request from the host as well as for the periodic
982          * statistics notifications (after received beacons) from the uCode.
983          */
984         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
985         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
986
987         iwl_setup_spectrum_handlers(priv);
988         iwl_setup_rx_scan_handlers(priv);
989         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
990
991         /* Set up hardware specific Rx handlers */
992         iwl3945_hw_rx_handler_setup(priv);
993 }
994
995 /************************** RX-FUNCTIONS ****************************/
996 /*
997  * Rx theory of operation
998  *
999  * The host allocates 32 DMA target addresses and passes the host address
1000  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1001  * 0 to 31
1002  *
1003  * Rx Queue Indexes
1004  * The host/firmware share two index registers for managing the Rx buffers.
1005  *
1006  * The READ index maps to the first position that the firmware may be writing
1007  * to -- the driver can read up to (but not including) this position and get
1008  * good data.
1009  * The READ index is managed by the firmware once the card is enabled.
1010  *
1011  * The WRITE index maps to the last position the driver has read from -- the
1012  * position preceding WRITE is the last slot the firmware can place a packet.
1013  *
1014  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1015  * WRITE = READ.
1016  *
1017  * During initialization, the host sets up the READ queue position to the first
1018  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1019  *
1020  * When the firmware places a packet in a buffer, it will advance the READ index
1021  * and fire the RX interrupt.  The driver can then query the READ index and
1022  * process as many packets as possible, moving the WRITE index forward as it
1023  * resets the Rx queue buffers with new memory.
1024  *
1025  * The management in the driver is as follows:
1026  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1027  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1028  *   to replenish the iwl->rxq->rx_free.
1029  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1030  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1031  *   'processed' and 'read' driver indexes as well)
1032  * + A received packet is processed and handed to the kernel network stack,
1033  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1034  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1035  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1036  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1037  *   were enough free buffers and RX_STALLED is set it is cleared.
1038  *
1039  *
1040  * Driver sequence:
1041  *
1042  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1043  *                            iwl3945_rx_queue_restock
1044  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1045  *                            queue, updates firmware pointers, and updates
1046  *                            the WRITE index.  If insufficient rx_free buffers
1047  *                            are available, schedules iwl3945_rx_replenish
1048  *
1049  * -- enable interrupts --
1050  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1051  *                            READ INDEX, detaching the SKB from the pool.
1052  *                            Moves the packet buffer from queue to rx_used.
1053  *                            Calls iwl3945_rx_queue_restock to refill any empty
1054  *                            slots.
1055  * ...
1056  *
1057  */
1058
1059 /**
1060  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1061  */
1062 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1063                                           dma_addr_t dma_addr)
1064 {
1065         return cpu_to_le32((u32)dma_addr);
1066 }
1067
1068 /**
1069  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1070  *
1071  * If there are slots in the RX queue that need to be restocked,
1072  * and we have free pre-allocated buffers, fill the ranks as much
1073  * as we can, pulling from rx_free.
1074  *
1075  * This moves the 'write' index forward to catch up with 'processed', and
1076  * also updates the memory address in the firmware to reference the new
1077  * target buffer.
1078  */
1079 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1080 {
1081         struct iwl_rx_queue *rxq = &priv->rxq;
1082         struct list_head *element;
1083         struct iwl_rx_mem_buffer *rxb;
1084         unsigned long flags;
1085         int write, rc;
1086
1087         spin_lock_irqsave(&rxq->lock, flags);
1088         write = rxq->write & ~0x7;
1089         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1090                 /* Get next free Rx buffer, remove from free list */
1091                 element = rxq->rx_free.next;
1092                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1093                 list_del(element);
1094
1095                 /* Point to Rx buffer via next RBD in circular buffer */
1096                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1097                 rxq->queue[rxq->write] = rxb;
1098                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1099                 rxq->free_count--;
1100         }
1101         spin_unlock_irqrestore(&rxq->lock, flags);
1102         /* If the pre-allocated buffer pool is dropping low, schedule to
1103          * refill it */
1104         if (rxq->free_count <= RX_LOW_WATERMARK)
1105                 queue_work(priv->workqueue, &priv->rx_replenish);
1106
1107
1108         /* If we've added more space for the firmware to place data, tell it.
1109          * Increment device's write pointer in multiples of 8. */
1110         if ((rxq->write_actual != (rxq->write & ~0x7))
1111             || (abs(rxq->write - rxq->read) > 7)) {
1112                 spin_lock_irqsave(&rxq->lock, flags);
1113                 rxq->need_update = 1;
1114                 spin_unlock_irqrestore(&rxq->lock, flags);
1115                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1116                 if (rc)
1117                         return rc;
1118         }
1119
1120         return 0;
1121 }
1122
1123 /**
1124  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1125  *
1126  * When moving to rx_free an SKB is allocated for the slot.
1127  *
1128  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1129  * This is called as a scheduled work item (except for during initialization)
1130  */
1131 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1132 {
1133         struct iwl_rx_queue *rxq = &priv->rxq;
1134         struct list_head *element;
1135         struct iwl_rx_mem_buffer *rxb;
1136         struct sk_buff *skb;
1137         unsigned long flags;
1138
1139         while (1) {
1140                 spin_lock_irqsave(&rxq->lock, flags);
1141
1142                 if (list_empty(&rxq->rx_used)) {
1143                         spin_unlock_irqrestore(&rxq->lock, flags);
1144                         return;
1145                 }
1146                 spin_unlock_irqrestore(&rxq->lock, flags);
1147
1148                 if (rxq->free_count > RX_LOW_WATERMARK)
1149                         priority |= __GFP_NOWARN;
1150                 /* Alloc a new receive buffer */
1151                 skb = alloc_skb(priv->hw_params.rx_buf_size, priority);
1152                 if (!skb) {
1153                         if (net_ratelimit())
1154                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1155                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1156                             net_ratelimit())
1157                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1158                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1159                                          rxq->free_count);
1160                         /* We don't reschedule replenish work here -- we will
1161                          * call the restock method and if it still needs
1162                          * more buffers it will schedule replenish */
1163                         break;
1164                 }
1165
1166                 spin_lock_irqsave(&rxq->lock, flags);
1167                 if (list_empty(&rxq->rx_used)) {
1168                         spin_unlock_irqrestore(&rxq->lock, flags);
1169                         dev_kfree_skb_any(skb);
1170                         return;
1171                 }
1172                 element = rxq->rx_used.next;
1173                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1174                 list_del(element);
1175                 spin_unlock_irqrestore(&rxq->lock, flags);
1176
1177                 rxb->skb = skb;
1178
1179                 /* If radiotap head is required, reserve some headroom here.
1180                  * The physical head count is a variable rx_stats->phy_count.
1181                  * We reserve 4 bytes here. Plus these extra bytes, the
1182                  * headroom of the physical head should be enough for the
1183                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1184                  */
1185                 skb_reserve(rxb->skb, 4);
1186
1187                 /* Get physical address of RB/SKB */
1188                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1189                                                 rxb->skb->data,
1190                                                 priv->hw_params.rx_buf_size,
1191                                                 PCI_DMA_FROMDEVICE);
1192
1193                 spin_lock_irqsave(&rxq->lock, flags);
1194                 list_add_tail(&rxb->list, &rxq->rx_free);
1195                 priv->alloc_rxb_skb++;
1196                 rxq->free_count++;
1197                 spin_unlock_irqrestore(&rxq->lock, flags);
1198         }
1199 }
1200
1201 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1202 {
1203         unsigned long flags;
1204         int i;
1205         spin_lock_irqsave(&rxq->lock, flags);
1206         INIT_LIST_HEAD(&rxq->rx_free);
1207         INIT_LIST_HEAD(&rxq->rx_used);
1208         /* Fill the rx_used queue with _all_ of the Rx buffers */
1209         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1210                 /* In the reset function, these buffers may have been allocated
1211                  * to an SKB, so we need to unmap and free potential storage */
1212                 if (rxq->pool[i].skb != NULL) {
1213                         pci_unmap_single(priv->pci_dev,
1214                                          rxq->pool[i].real_dma_addr,
1215                                          priv->hw_params.rx_buf_size,
1216                                          PCI_DMA_FROMDEVICE);
1217                         priv->alloc_rxb_skb--;
1218                         dev_kfree_skb(rxq->pool[i].skb);
1219                         rxq->pool[i].skb = NULL;
1220                 }
1221                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1222         }
1223
1224         /* Set us so that we have processed and used all buffers, but have
1225          * not restocked the Rx queue with fresh buffers */
1226         rxq->read = rxq->write = 0;
1227         rxq->free_count = 0;
1228         rxq->write_actual = 0;
1229         spin_unlock_irqrestore(&rxq->lock, flags);
1230 }
1231
1232 void iwl3945_rx_replenish(void *data)
1233 {
1234         struct iwl_priv *priv = data;
1235         unsigned long flags;
1236
1237         iwl3945_rx_allocate(priv, GFP_KERNEL);
1238
1239         spin_lock_irqsave(&priv->lock, flags);
1240         iwl3945_rx_queue_restock(priv);
1241         spin_unlock_irqrestore(&priv->lock, flags);
1242 }
1243
1244 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1245 {
1246         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1247
1248         iwl3945_rx_queue_restock(priv);
1249 }
1250
1251
1252 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1253  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1254  * This free routine walks the list of POOL entries and if SKB is set to
1255  * non NULL it is unmapped and freed
1256  */
1257 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1258 {
1259         int i;
1260         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1261                 if (rxq->pool[i].skb != NULL) {
1262                         pci_unmap_single(priv->pci_dev,
1263                                          rxq->pool[i].real_dma_addr,
1264                                          priv->hw_params.rx_buf_size,
1265                                          PCI_DMA_FROMDEVICE);
1266                         dev_kfree_skb(rxq->pool[i].skb);
1267                 }
1268         }
1269
1270         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1271                             rxq->dma_addr);
1272         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1273                             rxq->rb_stts, rxq->rb_stts_dma);
1274         rxq->bd = NULL;
1275         rxq->rb_stts  = NULL;
1276 }
1277
1278
1279 /* Convert linear signal-to-noise ratio into dB */
1280 static u8 ratio2dB[100] = {
1281 /*       0   1   2   3   4   5   6   7   8   9 */
1282          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1283         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1284         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1285         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1286         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1287         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1288         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1289         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1290         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1291         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1292 };
1293
1294 /* Calculates a relative dB value from a ratio of linear
1295  *   (i.e. not dB) signal levels.
1296  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1297 int iwl3945_calc_db_from_ratio(int sig_ratio)
1298 {
1299         /* 1000:1 or higher just report as 60 dB */
1300         if (sig_ratio >= 1000)
1301                 return 60;
1302
1303         /* 100:1 or higher, divide by 10 and use table,
1304          *   add 20 dB to make up for divide by 10 */
1305         if (sig_ratio >= 100)
1306                 return 20 + (int)ratio2dB[sig_ratio/10];
1307
1308         /* We shouldn't see this */
1309         if (sig_ratio < 1)
1310                 return 0;
1311
1312         /* Use table for ratios 1:1 - 99:1 */
1313         return (int)ratio2dB[sig_ratio];
1314 }
1315
1316 #define PERFECT_RSSI (-20) /* dBm */
1317 #define WORST_RSSI (-95)   /* dBm */
1318 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1319
1320 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1321  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1322  *   about formulas used below. */
1323 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1324 {
1325         int sig_qual;
1326         int degradation = PERFECT_RSSI - rssi_dbm;
1327
1328         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1329          * as indicator; formula is (signal dbm - noise dbm).
1330          * SNR at or above 40 is a great signal (100%).
1331          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1332          * Weakest usable signal is usually 10 - 15 dB SNR. */
1333         if (noise_dbm) {
1334                 if (rssi_dbm - noise_dbm >= 40)
1335                         return 100;
1336                 else if (rssi_dbm < noise_dbm)
1337                         return 0;
1338                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1339
1340         /* Else use just the signal level.
1341          * This formula is a least squares fit of data points collected and
1342          *   compared with a reference system that had a percentage (%) display
1343          *   for signal quality. */
1344         } else
1345                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1346                             (15 * RSSI_RANGE + 62 * degradation)) /
1347                            (RSSI_RANGE * RSSI_RANGE);
1348
1349         if (sig_qual > 100)
1350                 sig_qual = 100;
1351         else if (sig_qual < 1)
1352                 sig_qual = 0;
1353
1354         return sig_qual;
1355 }
1356
1357 /**
1358  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1359  *
1360  * Uses the priv->rx_handlers callback function array to invoke
1361  * the appropriate handlers, including command responses,
1362  * frame-received notifications, and other notifications.
1363  */
1364 static void iwl3945_rx_handle(struct iwl_priv *priv)
1365 {
1366         struct iwl_rx_mem_buffer *rxb;
1367         struct iwl_rx_packet *pkt;
1368         struct iwl_rx_queue *rxq = &priv->rxq;
1369         u32 r, i;
1370         int reclaim;
1371         unsigned long flags;
1372         u8 fill_rx = 0;
1373         u32 count = 8;
1374         int total_empty = 0;
1375
1376         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1377          * buffer that the driver may process (last buffer filled by ucode). */
1378         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1379         i = rxq->read;
1380
1381         /* calculate total frames need to be restock after handling RX */
1382         total_empty = r - priv->rxq.write_actual;
1383         if (total_empty < 0)
1384                 total_empty += RX_QUEUE_SIZE;
1385
1386         if (total_empty > (RX_QUEUE_SIZE / 2))
1387                 fill_rx = 1;
1388         /* Rx interrupt, but nothing sent from uCode */
1389         if (i == r)
1390                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1391
1392         while (i != r) {
1393                 rxb = rxq->queue[i];
1394
1395                 /* If an RXB doesn't have a Rx queue slot associated with it,
1396                  * then a bug has been introduced in the queue refilling
1397                  * routines -- catch it here */
1398                 BUG_ON(rxb == NULL);
1399
1400                 rxq->queue[i] = NULL;
1401
1402                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1403                                 priv->hw_params.rx_buf_size,
1404                                 PCI_DMA_FROMDEVICE);
1405                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1406
1407                 trace_iwlwifi_dev_rx(priv, pkt,
1408                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1409
1410                 /* Reclaim a command buffer only if this packet is a response
1411                  *   to a (driver-originated) command.
1412                  * If the packet (e.g. Rx frame) originated from uCode,
1413                  *   there is no command buffer to reclaim.
1414                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1415                  *   but apparently a few don't get set; catch them here. */
1416                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1417                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1418                         (pkt->hdr.cmd != REPLY_TX);
1419
1420                 /* Based on type of command response or notification,
1421                  *   handle those that need handling via function in
1422                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1423                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1424                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1425                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1426                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1427                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1428                 } else {
1429                         /* No handling needed */
1430                         IWL_DEBUG_RX(priv, "r %d i %d No handler needed for %s, 0x%02x\n",
1431                                 r, i, get_cmd_string(pkt->hdr.cmd),
1432                                 pkt->hdr.cmd);
1433                 }
1434
1435                 if (reclaim) {
1436                         /* Invoke any callbacks, transfer the skb to caller, and
1437                          * fire off the (possibly) blocking iwl_send_cmd()
1438                          * as we reclaim the driver command queue */
1439                         if (rxb && rxb->skb)
1440                                 iwl_tx_cmd_complete(priv, rxb);
1441                         else
1442                                 IWL_WARN(priv, "Claim null rxb?\n");
1443                 }
1444
1445                 /* For now we just don't re-use anything.  We can tweak this
1446                  * later to try and re-use notification packets and SKBs that
1447                  * fail to Rx correctly */
1448                 if (rxb->skb != NULL) {
1449                         priv->alloc_rxb_skb--;
1450                         dev_kfree_skb_any(rxb->skb);
1451                         rxb->skb = NULL;
1452                 }
1453
1454                 spin_lock_irqsave(&rxq->lock, flags);
1455                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1456                 spin_unlock_irqrestore(&rxq->lock, flags);
1457                 i = (i + 1) & RX_QUEUE_MASK;
1458                 /* If there are a lot of unused frames,
1459                  * restock the Rx queue so ucode won't assert. */
1460                 if (fill_rx) {
1461                         count++;
1462                         if (count >= 8) {
1463                                 priv->rxq.read = i;
1464                                 iwl3945_rx_replenish_now(priv);
1465                                 count = 0;
1466                         }
1467                 }
1468         }
1469
1470         /* Backtrack one entry */
1471         priv->rxq.read = i;
1472         if (fill_rx)
1473                 iwl3945_rx_replenish_now(priv);
1474         else
1475                 iwl3945_rx_queue_restock(priv);
1476 }
1477
1478 /* call this function to flush any scheduled tasklet */
1479 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1480 {
1481         /* wait to make sure we flush pending tasklet*/
1482         synchronize_irq(priv->pci_dev->irq);
1483         tasklet_kill(&priv->irq_tasklet);
1484 }
1485
1486 #ifdef CONFIG_IWLWIFI_DEBUG
1487 static const char *desc_lookup(int i)
1488 {
1489         switch (i) {
1490         case 1:
1491                 return "FAIL";
1492         case 2:
1493                 return "BAD_PARAM";
1494         case 3:
1495                 return "BAD_CHECKSUM";
1496         case 4:
1497                 return "NMI_INTERRUPT";
1498         case 5:
1499                 return "SYSASSERT";
1500         case 6:
1501                 return "FATAL_ERROR";
1502         }
1503
1504         return "UNKNOWN";
1505 }
1506
1507 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1508 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1509
1510 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1511 {
1512         u32 i;
1513         u32 desc, time, count, base, data1;
1514         u32 blink1, blink2, ilink1, ilink2;
1515
1516         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1517
1518         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1519                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1520                 return;
1521         }
1522
1523
1524         count = iwl_read_targ_mem(priv, base);
1525
1526         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1527                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1528                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1529                         priv->status, count);
1530         }
1531
1532         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1533                   "ilink1  nmiPC   Line\n");
1534         for (i = ERROR_START_OFFSET;
1535              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1536              i += ERROR_ELEM_SIZE) {
1537                 desc = iwl_read_targ_mem(priv, base + i);
1538                 time =
1539                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1540                 blink1 =
1541                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1542                 blink2 =
1543                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1544                 ilink1 =
1545                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1546                 ilink2 =
1547                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1548                 data1 =
1549                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1550
1551                 IWL_ERR(priv,
1552                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1553                         desc_lookup(desc), desc, time, blink1, blink2,
1554                         ilink1, ilink2, data1);
1555                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1556                                         0, blink1, blink2, ilink1, ilink2);
1557         }
1558 }
1559
1560 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1561
1562 /**
1563  * iwl3945_print_event_log - Dump error event log to syslog
1564  *
1565  */
1566 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1567                                 u32 num_events, u32 mode)
1568 {
1569         u32 i;
1570         u32 base;       /* SRAM byte address of event log header */
1571         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1572         u32 ptr;        /* SRAM byte address of log data */
1573         u32 ev, time, data; /* event log data */
1574
1575         if (num_events == 0)
1576                 return;
1577
1578         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1579
1580         if (mode == 0)
1581                 event_size = 2 * sizeof(u32);
1582         else
1583                 event_size = 3 * sizeof(u32);
1584
1585         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1586
1587         /* "time" is actually "data" for mode 0 (no timestamp).
1588          * place event id # at far right for easier visual parsing. */
1589         for (i = 0; i < num_events; i++) {
1590                 ev = iwl_read_targ_mem(priv, ptr);
1591                 ptr += sizeof(u32);
1592                 time = iwl_read_targ_mem(priv, ptr);
1593                 ptr += sizeof(u32);
1594                 if (mode == 0) {
1595                         /* data, ev */
1596                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1597                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1598                 } else {
1599                         data = iwl_read_targ_mem(priv, ptr);
1600                         ptr += sizeof(u32);
1601                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1602                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1603                 }
1604         }
1605 }
1606
1607 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1608 {
1609         u32 base;       /* SRAM byte address of event log header */
1610         u32 capacity;   /* event log capacity in # entries */
1611         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1612         u32 num_wraps;  /* # times uCode wrapped to top of log */
1613         u32 next_entry; /* index of next entry to be written by uCode */
1614         u32 size;       /* # entries that we'll print */
1615
1616         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1617         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1618                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1619                 return;
1620         }
1621
1622         /* event log header */
1623         capacity = iwl_read_targ_mem(priv, base);
1624         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1625         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1626         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1627
1628         size = num_wraps ? capacity : next_entry;
1629
1630         /* bail out if nothing in log */
1631         if (size == 0) {
1632                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1633                 return;
1634         }
1635
1636         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1637                   size, num_wraps);
1638
1639         /* if uCode has wrapped back to top of log, start at the oldest entry,
1640          * i.e the next one that uCode would fill. */
1641         if (num_wraps)
1642                 iwl3945_print_event_log(priv, next_entry,
1643                                     capacity - next_entry, mode);
1644
1645         /* (then/else) start at top of log */
1646         iwl3945_print_event_log(priv, 0, next_entry, mode);
1647
1648 }
1649 #else
1650 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1651 {
1652 }
1653
1654 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1655 {
1656 }
1657
1658 #endif
1659
1660 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1661 {
1662         u32 inta, handled = 0;
1663         u32 inta_fh;
1664         unsigned long flags;
1665 #ifdef CONFIG_IWLWIFI_DEBUG
1666         u32 inta_mask;
1667 #endif
1668
1669         spin_lock_irqsave(&priv->lock, flags);
1670
1671         /* Ack/clear/reset pending uCode interrupts.
1672          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1673          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1674         inta = iwl_read32(priv, CSR_INT);
1675         iwl_write32(priv, CSR_INT, inta);
1676
1677         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1678          * Any new interrupts that happen after this, either while we're
1679          * in this tasklet, or later, will show up in next ISR/tasklet. */
1680         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1681         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1682
1683 #ifdef CONFIG_IWLWIFI_DEBUG
1684         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1685                 /* just for debug */
1686                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1687                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1688                               inta, inta_mask, inta_fh);
1689         }
1690 #endif
1691
1692         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1693          * atomic, make sure that inta covers all the interrupts that
1694          * we've discovered, even if FH interrupt came in just after
1695          * reading CSR_INT. */
1696         if (inta_fh & CSR39_FH_INT_RX_MASK)
1697                 inta |= CSR_INT_BIT_FH_RX;
1698         if (inta_fh & CSR39_FH_INT_TX_MASK)
1699                 inta |= CSR_INT_BIT_FH_TX;
1700
1701         /* Now service all interrupt bits discovered above. */
1702         if (inta & CSR_INT_BIT_HW_ERR) {
1703                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1704
1705                 /* Tell the device to stop sending interrupts */
1706                 iwl_disable_interrupts(priv);
1707
1708                 priv->isr_stats.hw++;
1709                 iwl_irq_handle_error(priv);
1710
1711                 handled |= CSR_INT_BIT_HW_ERR;
1712
1713                 spin_unlock_irqrestore(&priv->lock, flags);
1714
1715                 return;
1716         }
1717
1718 #ifdef CONFIG_IWLWIFI_DEBUG
1719         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1720                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1721                 if (inta & CSR_INT_BIT_SCD) {
1722                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1723                                       "the frame/frames.\n");
1724                         priv->isr_stats.sch++;
1725                 }
1726
1727                 /* Alive notification via Rx interrupt will do the real work */
1728                 if (inta & CSR_INT_BIT_ALIVE) {
1729                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1730                         priv->isr_stats.alive++;
1731                 }
1732         }
1733 #endif
1734         /* Safely ignore these bits for debug checks below */
1735         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1736
1737         /* Error detected by uCode */
1738         if (inta & CSR_INT_BIT_SW_ERR) {
1739                 IWL_ERR(priv, "Microcode SW error detected. "
1740                         "Restarting 0x%X.\n", inta);
1741                 priv->isr_stats.sw++;
1742                 priv->isr_stats.sw_err = inta;
1743                 iwl_irq_handle_error(priv);
1744                 handled |= CSR_INT_BIT_SW_ERR;
1745         }
1746
1747         /* uCode wakes up after power-down sleep */
1748         if (inta & CSR_INT_BIT_WAKEUP) {
1749                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1750                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1751                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1752                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1753                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1754                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1755                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1756                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1757
1758                 priv->isr_stats.wakeup++;
1759                 handled |= CSR_INT_BIT_WAKEUP;
1760         }
1761
1762         /* All uCode command responses, including Tx command responses,
1763          * Rx "responses" (frame-received notification), and other
1764          * notifications from uCode come through here*/
1765         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1766                 iwl3945_rx_handle(priv);
1767                 priv->isr_stats.rx++;
1768                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1769         }
1770
1771         if (inta & CSR_INT_BIT_FH_TX) {
1772                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1773                 priv->isr_stats.tx++;
1774
1775                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1776                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1777                                         (FH39_SRVC_CHNL), 0x0);
1778                 handled |= CSR_INT_BIT_FH_TX;
1779         }
1780
1781         if (inta & ~handled) {
1782                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1783                 priv->isr_stats.unhandled++;
1784         }
1785
1786         if (inta & ~priv->inta_mask) {
1787                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1788                          inta & ~priv->inta_mask);
1789                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1790         }
1791
1792         /* Re-enable all interrupts */
1793         /* only Re-enable if disabled by irq */
1794         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1795                 iwl_enable_interrupts(priv);
1796
1797 #ifdef CONFIG_IWLWIFI_DEBUG
1798         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1799                 inta = iwl_read32(priv, CSR_INT);
1800                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1801                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1802                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1803                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1804         }
1805 #endif
1806         spin_unlock_irqrestore(&priv->lock, flags);
1807 }
1808
1809 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1810                                          enum ieee80211_band band,
1811                                      u8 is_active, u8 n_probes,
1812                                      struct iwl3945_scan_channel *scan_ch)
1813 {
1814         struct ieee80211_channel *chan;
1815         const struct ieee80211_supported_band *sband;
1816         const struct iwl_channel_info *ch_info;
1817         u16 passive_dwell = 0;
1818         u16 active_dwell = 0;
1819         int added, i;
1820
1821         sband = iwl_get_hw_mode(priv, band);
1822         if (!sband)
1823                 return 0;
1824
1825         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1826         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1827
1828         if (passive_dwell <= active_dwell)
1829                 passive_dwell = active_dwell + 1;
1830
1831         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1832                 chan = priv->scan_request->channels[i];
1833
1834                 if (chan->band != band)
1835                         continue;
1836
1837                 scan_ch->channel = chan->hw_value;
1838
1839                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1840                 if (!is_channel_valid(ch_info)) {
1841                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1842                                        scan_ch->channel);
1843                         continue;
1844                 }
1845
1846                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1847                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1848                 /* If passive , set up for auto-switch
1849                  *  and use long active_dwell time.
1850                  */
1851                 if (!is_active || is_channel_passive(ch_info) ||
1852                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1853                         scan_ch->type = 0;      /* passive */
1854                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1855                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1856                 } else {
1857                         scan_ch->type = 1;      /* active */
1858                 }
1859
1860                 /* Set direct probe bits. These may be used both for active
1861                  * scan channels (probes gets sent right away),
1862                  * or for passive channels (probes get se sent only after
1863                  * hearing clear Rx packet).*/
1864                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1865                         if (n_probes)
1866                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1867                 } else {
1868                         /* uCode v1 does not allow setting direct probe bits on
1869                          * passive channel. */
1870                         if ((scan_ch->type & 1) && n_probes)
1871                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1872                 }
1873
1874                 /* Set txpower levels to defaults */
1875                 scan_ch->tpc.dsp_atten = 110;
1876                 /* scan_pwr_info->tpc.dsp_atten; */
1877
1878                 /*scan_pwr_info->tpc.tx_gain; */
1879                 if (band == IEEE80211_BAND_5GHZ)
1880                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1881                 else {
1882                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1883                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1884                          * power level:
1885                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1886                          */
1887                 }
1888
1889                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1890                                scan_ch->channel,
1891                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1892                                (scan_ch->type & 1) ?
1893                                active_dwell : passive_dwell);
1894
1895                 scan_ch++;
1896                 added++;
1897         }
1898
1899         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1900         return added;
1901 }
1902
1903 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1904                               struct ieee80211_rate *rates)
1905 {
1906         int i;
1907
1908         for (i = 0; i < IWL_RATE_COUNT; i++) {
1909                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1910                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1911                 rates[i].hw_value_short = i;
1912                 rates[i].flags = 0;
1913                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1914                         /*
1915                          * If CCK != 1M then set short preamble rate flag.
1916                          */
1917                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1918                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1919                 }
1920         }
1921 }
1922
1923 /******************************************************************************
1924  *
1925  * uCode download functions
1926  *
1927  ******************************************************************************/
1928
1929 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1930 {
1931         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1932         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1933         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1934         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1935         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1936         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1937 }
1938
1939 /**
1940  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1941  *     looking at all data.
1942  */
1943 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1944 {
1945         u32 val;
1946         u32 save_len = len;
1947         int rc = 0;
1948         u32 errcnt;
1949
1950         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1951
1952         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1953                                IWL39_RTC_INST_LOWER_BOUND);
1954
1955         errcnt = 0;
1956         for (; len > 0; len -= sizeof(u32), image++) {
1957                 /* read data comes through single port, auto-incr addr */
1958                 /* NOTE: Use the debugless read so we don't flood kernel log
1959                  * if IWL_DL_IO is set */
1960                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1961                 if (val != le32_to_cpu(*image)) {
1962                         IWL_ERR(priv, "uCode INST section is invalid at "
1963                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1964                                   save_len - len, val, le32_to_cpu(*image));
1965                         rc = -EIO;
1966                         errcnt++;
1967                         if (errcnt >= 20)
1968                                 break;
1969                 }
1970         }
1971
1972
1973         if (!errcnt)
1974                 IWL_DEBUG_INFO(priv,
1975                         "ucode image in INSTRUCTION memory is good\n");
1976
1977         return rc;
1978 }
1979
1980
1981 /**
1982  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1983  *   using sample data 100 bytes apart.  If these sample points are good,
1984  *   it's a pretty good bet that everything between them is good, too.
1985  */
1986 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1987 {
1988         u32 val;
1989         int rc = 0;
1990         u32 errcnt = 0;
1991         u32 i;
1992
1993         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1994
1995         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1996                 /* read data comes through single port, auto-incr addr */
1997                 /* NOTE: Use the debugless read so we don't flood kernel log
1998                  * if IWL_DL_IO is set */
1999                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2000                         i + IWL39_RTC_INST_LOWER_BOUND);
2001                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2002                 if (val != le32_to_cpu(*image)) {
2003 #if 0 /* Enable this if you want to see details */
2004                         IWL_ERR(priv, "uCode INST section is invalid at "
2005                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2006                                   i, val, *image);
2007 #endif
2008                         rc = -EIO;
2009                         errcnt++;
2010                         if (errcnt >= 3)
2011                                 break;
2012                 }
2013         }
2014
2015         return rc;
2016 }
2017
2018
2019 /**
2020  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2021  *    and verify its contents
2022  */
2023 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2024 {
2025         __le32 *image;
2026         u32 len;
2027         int rc = 0;
2028
2029         /* Try bootstrap */
2030         image = (__le32 *)priv->ucode_boot.v_addr;
2031         len = priv->ucode_boot.len;
2032         rc = iwl3945_verify_inst_sparse(priv, image, len);
2033         if (rc == 0) {
2034                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2035                 return 0;
2036         }
2037
2038         /* Try initialize */
2039         image = (__le32 *)priv->ucode_init.v_addr;
2040         len = priv->ucode_init.len;
2041         rc = iwl3945_verify_inst_sparse(priv, image, len);
2042         if (rc == 0) {
2043                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2044                 return 0;
2045         }
2046
2047         /* Try runtime/protocol */
2048         image = (__le32 *)priv->ucode_code.v_addr;
2049         len = priv->ucode_code.len;
2050         rc = iwl3945_verify_inst_sparse(priv, image, len);
2051         if (rc == 0) {
2052                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2053                 return 0;
2054         }
2055
2056         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2057
2058         /* Since nothing seems to match, show first several data entries in
2059          * instruction SRAM, so maybe visual inspection will give a clue.
2060          * Selection of bootstrap image (vs. other images) is arbitrary. */
2061         image = (__le32 *)priv->ucode_boot.v_addr;
2062         len = priv->ucode_boot.len;
2063         rc = iwl3945_verify_inst_full(priv, image, len);
2064
2065         return rc;
2066 }
2067
2068 static void iwl3945_nic_start(struct iwl_priv *priv)
2069 {
2070         /* Remove all resets to allow NIC to operate */
2071         iwl_write32(priv, CSR_RESET, 0);
2072 }
2073
2074 /**
2075  * iwl3945_read_ucode - Read uCode images from disk file.
2076  *
2077  * Copy into buffers for card to fetch via bus-mastering
2078  */
2079 static int iwl3945_read_ucode(struct iwl_priv *priv)
2080 {
2081         const struct iwl_ucode_header *ucode;
2082         int ret = -EINVAL, index;
2083         const struct firmware *ucode_raw;
2084         /* firmware file name contains uCode/driver compatibility version */
2085         const char *name_pre = priv->cfg->fw_name_pre;
2086         const unsigned int api_max = priv->cfg->ucode_api_max;
2087         const unsigned int api_min = priv->cfg->ucode_api_min;
2088         char buf[25];
2089         u8 *src;
2090         size_t len;
2091         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2092
2093         /* Ask kernel firmware_class module to get the boot firmware off disk.
2094          * request_firmware() is synchronous, file is in memory on return. */
2095         for (index = api_max; index >= api_min; index--) {
2096                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2097                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2098                 if (ret < 0) {
2099                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2100                                   buf, ret);
2101                         if (ret == -ENOENT)
2102                                 continue;
2103                         else
2104                                 goto error;
2105                 } else {
2106                         if (index < api_max)
2107                                 IWL_ERR(priv, "Loaded firmware %s, "
2108                                         "which is deprecated. "
2109                                         " Please use API v%u instead.\n",
2110                                           buf, api_max);
2111                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2112                                        "(%zd bytes) from disk\n",
2113                                        buf, ucode_raw->size);
2114                         break;
2115                 }
2116         }
2117
2118         if (ret < 0)
2119                 goto error;
2120
2121         /* Make sure that we got at least our header! */
2122         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2123                 IWL_ERR(priv, "File size way too small!\n");
2124                 ret = -EINVAL;
2125                 goto err_release;
2126         }
2127
2128         /* Data from ucode file:  header followed by uCode images */
2129         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2130
2131         priv->ucode_ver = le32_to_cpu(ucode->ver);
2132         api_ver = IWL_UCODE_API(priv->ucode_ver);
2133         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2134         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2135         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2136         init_data_size =
2137                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2138         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2139         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2140
2141         /* api_ver should match the api version forming part of the
2142          * firmware filename ... but we don't check for that and only rely
2143          * on the API version read from firmware header from here on forward */
2144
2145         if (api_ver < api_min || api_ver > api_max) {
2146                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2147                           "Driver supports v%u, firmware is v%u.\n",
2148                           api_max, api_ver);
2149                 priv->ucode_ver = 0;
2150                 ret = -EINVAL;
2151                 goto err_release;
2152         }
2153         if (api_ver != api_max)
2154                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2155                           "got %u. New firmware can be obtained "
2156                           "from http://www.intellinuxwireless.org.\n",
2157                           api_max, api_ver);
2158
2159         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2160                 IWL_UCODE_MAJOR(priv->ucode_ver),
2161                 IWL_UCODE_MINOR(priv->ucode_ver),
2162                 IWL_UCODE_API(priv->ucode_ver),
2163                 IWL_UCODE_SERIAL(priv->ucode_ver));
2164
2165         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2166                        priv->ucode_ver);
2167         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2168                        inst_size);
2169         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2170                        data_size);
2171         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2172                        init_size);
2173         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2174                        init_data_size);
2175         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2176                        boot_size);
2177
2178
2179         /* Verify size of file vs. image size info in file's header */
2180         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2181                 inst_size + data_size + init_size +
2182                 init_data_size + boot_size) {
2183
2184                 IWL_DEBUG_INFO(priv,
2185                         "uCode file size %zd does not match expected size\n",
2186                         ucode_raw->size);
2187                 ret = -EINVAL;
2188                 goto err_release;
2189         }
2190
2191         /* Verify that uCode images will fit in card's SRAM */
2192         if (inst_size > IWL39_MAX_INST_SIZE) {
2193                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2194                                inst_size);
2195                 ret = -EINVAL;
2196                 goto err_release;
2197         }
2198
2199         if (data_size > IWL39_MAX_DATA_SIZE) {
2200                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2201                                data_size);
2202                 ret = -EINVAL;
2203                 goto err_release;
2204         }
2205         if (init_size > IWL39_MAX_INST_SIZE) {
2206                 IWL_DEBUG_INFO(priv,
2207                                 "uCode init instr len %d too large to fit in\n",
2208                                 init_size);
2209                 ret = -EINVAL;
2210                 goto err_release;
2211         }
2212         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2213                 IWL_DEBUG_INFO(priv,
2214                                 "uCode init data len %d too large to fit in\n",
2215                                 init_data_size);
2216                 ret = -EINVAL;
2217                 goto err_release;
2218         }
2219         if (boot_size > IWL39_MAX_BSM_SIZE) {
2220                 IWL_DEBUG_INFO(priv,
2221                                 "uCode boot instr len %d too large to fit in\n",
2222                                 boot_size);
2223                 ret = -EINVAL;
2224                 goto err_release;
2225         }
2226
2227         /* Allocate ucode buffers for card's bus-master loading ... */
2228
2229         /* Runtime instructions and 2 copies of data:
2230          * 1) unmodified from disk
2231          * 2) backup cache for save/restore during power-downs */
2232         priv->ucode_code.len = inst_size;
2233         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2234
2235         priv->ucode_data.len = data_size;
2236         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2237
2238         priv->ucode_data_backup.len = data_size;
2239         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2240
2241         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2242             !priv->ucode_data_backup.v_addr)
2243                 goto err_pci_alloc;
2244
2245         /* Initialization instructions and data */
2246         if (init_size && init_data_size) {
2247                 priv->ucode_init.len = init_size;
2248                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2249
2250                 priv->ucode_init_data.len = init_data_size;
2251                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2252
2253                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2254                         goto err_pci_alloc;
2255         }
2256
2257         /* Bootstrap (instructions only, no data) */
2258         if (boot_size) {
2259                 priv->ucode_boot.len = boot_size;
2260                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2261
2262                 if (!priv->ucode_boot.v_addr)
2263                         goto err_pci_alloc;
2264         }
2265
2266         /* Copy images into buffers for card's bus-master reads ... */
2267
2268         /* Runtime instructions (first block of data in file) */
2269         len = inst_size;
2270         IWL_DEBUG_INFO(priv,
2271                 "Copying (but not loading) uCode instr len %zd\n", len);
2272         memcpy(priv->ucode_code.v_addr, src, len);
2273         src += len;
2274
2275         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2276                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2277
2278         /* Runtime data (2nd block)
2279          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2280         len = data_size;
2281         IWL_DEBUG_INFO(priv,
2282                 "Copying (but not loading) uCode data len %zd\n", len);
2283         memcpy(priv->ucode_data.v_addr, src, len);
2284         memcpy(priv->ucode_data_backup.v_addr, src, len);
2285         src += len;
2286
2287         /* Initialization instructions (3rd block) */
2288         if (init_size) {
2289                 len = init_size;
2290                 IWL_DEBUG_INFO(priv,
2291                         "Copying (but not loading) init instr len %zd\n", len);
2292                 memcpy(priv->ucode_init.v_addr, src, len);
2293                 src += len;
2294         }
2295
2296         /* Initialization data (4th block) */
2297         if (init_data_size) {
2298                 len = init_data_size;
2299                 IWL_DEBUG_INFO(priv,
2300                         "Copying (but not loading) init data len %zd\n", len);
2301                 memcpy(priv->ucode_init_data.v_addr, src, len);
2302                 src += len;
2303         }
2304
2305         /* Bootstrap instructions (5th block) */
2306         len = boot_size;
2307         IWL_DEBUG_INFO(priv,
2308                 "Copying (but not loading) boot instr len %zd\n", len);
2309         memcpy(priv->ucode_boot.v_addr, src, len);
2310
2311         /* We have our copies now, allow OS release its copies */
2312         release_firmware(ucode_raw);
2313         return 0;
2314
2315  err_pci_alloc:
2316         IWL_ERR(priv, "failed to allocate pci memory\n");
2317         ret = -ENOMEM;
2318         iwl3945_dealloc_ucode_pci(priv);
2319
2320  err_release:
2321         release_firmware(ucode_raw);
2322
2323  error:
2324         return ret;
2325 }
2326
2327
2328 /**
2329  * iwl3945_set_ucode_ptrs - Set uCode address location
2330  *
2331  * Tell initialization uCode where to find runtime uCode.
2332  *
2333  * BSM registers initially contain pointers to initialization uCode.
2334  * We need to replace them to load runtime uCode inst and data,
2335  * and to save runtime data when powering down.
2336  */
2337 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2338 {
2339         dma_addr_t pinst;
2340         dma_addr_t pdata;
2341
2342         /* bits 31:0 for 3945 */
2343         pinst = priv->ucode_code.p_addr;
2344         pdata = priv->ucode_data_backup.p_addr;
2345
2346         /* Tell bootstrap uCode where to find image to load */
2347         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2348         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2349         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2350                                  priv->ucode_data.len);
2351
2352         /* Inst byte count must be last to set up, bit 31 signals uCode
2353          *   that all new ptr/size info is in place */
2354         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2355                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2356
2357         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2358
2359         return 0;
2360 }
2361
2362 /**
2363  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2364  *
2365  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2366  *
2367  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2368  */
2369 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2370 {
2371         /* Check alive response for "valid" sign from uCode */
2372         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2373                 /* We had an error bringing up the hardware, so take it
2374                  * all the way back down so we can try again */
2375                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2376                 goto restart;
2377         }
2378
2379         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2380          * This is a paranoid check, because we would not have gotten the
2381          * "initialize" alive if code weren't properly loaded.  */
2382         if (iwl3945_verify_ucode(priv)) {
2383                 /* Runtime instruction load was bad;
2384                  * take it all the way back down so we can try again */
2385                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2386                 goto restart;
2387         }
2388
2389         /* Send pointers to protocol/runtime uCode image ... init code will
2390          * load and launch runtime uCode, which will send us another "Alive"
2391          * notification. */
2392         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2393         if (iwl3945_set_ucode_ptrs(priv)) {
2394                 /* Runtime instruction load won't happen;
2395                  * take it all the way back down so we can try again */
2396                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2397                 goto restart;
2398         }
2399         return;
2400
2401  restart:
2402         queue_work(priv->workqueue, &priv->restart);
2403 }
2404
2405 /**
2406  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2407  *                   from protocol/runtime uCode (initialization uCode's
2408  *                   Alive gets handled by iwl3945_init_alive_start()).
2409  */
2410 static void iwl3945_alive_start(struct iwl_priv *priv)
2411 {
2412         int thermal_spin = 0;
2413         u32 rfkill;
2414
2415         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2416
2417         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2418                 /* We had an error bringing up the hardware, so take it
2419                  * all the way back down so we can try again */
2420                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2421                 goto restart;
2422         }
2423
2424         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2425          * This is a paranoid check, because we would not have gotten the
2426          * "runtime" alive if code weren't properly loaded.  */
2427         if (iwl3945_verify_ucode(priv)) {
2428                 /* Runtime instruction load was bad;
2429                  * take it all the way back down so we can try again */
2430                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2431                 goto restart;
2432         }
2433
2434         iwl_clear_stations_table(priv);
2435
2436         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2437         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2438
2439         if (rfkill & 0x1) {
2440                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2441                 /* if RFKILL is not on, then wait for thermal
2442                  * sensor in adapter to kick in */
2443                 while (iwl3945_hw_get_temperature(priv) == 0) {
2444                         thermal_spin++;
2445                         udelay(10);
2446                 }
2447
2448                 if (thermal_spin)
2449                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2450                                        thermal_spin * 10);
2451         } else
2452                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2453
2454         /* After the ALIVE response, we can send commands to 3945 uCode */
2455         set_bit(STATUS_ALIVE, &priv->status);
2456
2457         if (iwl_is_rfkill(priv))
2458                 return;
2459
2460         ieee80211_wake_queues(priv->hw);
2461
2462         priv->active_rate = priv->rates_mask;
2463         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2464
2465         iwl_power_update_mode(priv, false);
2466
2467         if (iwl_is_associated(priv)) {
2468                 struct iwl3945_rxon_cmd *active_rxon =
2469                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2470
2471                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2472                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2473         } else {
2474                 /* Initialize our rx_config data */
2475                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2476         }
2477
2478         /* Configure Bluetooth device coexistence support */
2479         iwl_send_bt_config(priv);
2480
2481         /* Configure the adapter for unassociated operation */
2482         iwlcore_commit_rxon(priv);
2483
2484         iwl3945_reg_txpower_periodic(priv);
2485
2486         iwl3945_led_register(priv);
2487
2488         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2489         set_bit(STATUS_READY, &priv->status);
2490         wake_up_interruptible(&priv->wait_command_queue);
2491
2492         /* reassociate for ADHOC mode */
2493         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2494                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2495                                                                 priv->vif);
2496                 if (beacon)
2497                         iwl_mac_beacon_update(priv->hw, beacon);
2498         }
2499
2500         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2501                 iwl_set_mode(priv, priv->iw_mode);
2502
2503         return;
2504
2505  restart:
2506         queue_work(priv->workqueue, &priv->restart);
2507 }
2508
2509 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2510
2511 static void __iwl3945_down(struct iwl_priv *priv)
2512 {
2513         unsigned long flags;
2514         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2515         struct ieee80211_conf *conf = NULL;
2516
2517         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2518
2519         conf = ieee80211_get_hw_conf(priv->hw);
2520
2521         if (!exit_pending)
2522                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2523
2524         iwl3945_led_unregister(priv);
2525         iwl_clear_stations_table(priv);
2526
2527         /* Unblock any waiting calls */
2528         wake_up_interruptible_all(&priv->wait_command_queue);
2529
2530         /* Wipe out the EXIT_PENDING status bit if we are not actually
2531          * exiting the module */
2532         if (!exit_pending)
2533                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2534
2535         /* stop and reset the on-board processor */
2536         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2537
2538         /* tell the device to stop sending interrupts */
2539         spin_lock_irqsave(&priv->lock, flags);
2540         iwl_disable_interrupts(priv);
2541         spin_unlock_irqrestore(&priv->lock, flags);
2542         iwl_synchronize_irq(priv);
2543
2544         if (priv->mac80211_registered)
2545                 ieee80211_stop_queues(priv->hw);
2546
2547         /* If we have not previously called iwl3945_init() then
2548          * clear all bits but the RF Kill bits and return */
2549         if (!iwl_is_init(priv)) {
2550                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2551                                         STATUS_RF_KILL_HW |
2552                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2553                                         STATUS_GEO_CONFIGURED |
2554                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2555                                         STATUS_EXIT_PENDING;
2556                 goto exit;
2557         }
2558
2559         /* ...otherwise clear out all the status bits but the RF Kill
2560          * bit and continue taking the NIC down. */
2561         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2562                                 STATUS_RF_KILL_HW |
2563                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2564                                 STATUS_GEO_CONFIGURED |
2565                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2566                                 STATUS_FW_ERROR |
2567                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2568                                 STATUS_EXIT_PENDING;
2569
2570         priv->cfg->ops->lib->apm_ops.reset(priv);
2571         spin_lock_irqsave(&priv->lock, flags);
2572         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2573         spin_unlock_irqrestore(&priv->lock, flags);
2574
2575         iwl3945_hw_txq_ctx_stop(priv);
2576         iwl3945_hw_rxq_stop(priv);
2577
2578         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2579                                 APMG_CLK_VAL_DMA_CLK_RQT);
2580
2581         udelay(5);
2582
2583         if (exit_pending)
2584                 priv->cfg->ops->lib->apm_ops.stop(priv);
2585         else
2586                 priv->cfg->ops->lib->apm_ops.reset(priv);
2587
2588  exit:
2589         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2590
2591         if (priv->ibss_beacon)
2592                 dev_kfree_skb(priv->ibss_beacon);
2593         priv->ibss_beacon = NULL;
2594
2595         /* clear out any free frames */
2596         iwl3945_clear_free_frames(priv);
2597 }
2598
2599 static void iwl3945_down(struct iwl_priv *priv)
2600 {
2601         mutex_lock(&priv->mutex);
2602         __iwl3945_down(priv);
2603         mutex_unlock(&priv->mutex);
2604
2605         iwl3945_cancel_deferred_work(priv);
2606 }
2607
2608 #define MAX_HW_RESTARTS 5
2609
2610 static int __iwl3945_up(struct iwl_priv *priv)
2611 {
2612         int rc, i;
2613
2614         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2615                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2616                 return -EIO;
2617         }
2618
2619         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2620                 IWL_ERR(priv, "ucode not available for device bring up\n");
2621                 return -EIO;
2622         }
2623
2624         /* If platform's RF_KILL switch is NOT set to KILL */
2625         if (iwl_read32(priv, CSR_GP_CNTRL) &
2626                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2627                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2628         else {
2629                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2630                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2631                 return -ENODEV;
2632         }
2633
2634         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2635
2636         rc = iwl3945_hw_nic_init(priv);
2637         if (rc) {
2638                 IWL_ERR(priv, "Unable to int nic\n");
2639                 return rc;
2640         }
2641
2642         /* make sure rfkill handshake bits are cleared */
2643         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2644         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2645                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2646
2647         /* clear (again), then enable host interrupts */
2648         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2649         iwl_enable_interrupts(priv);
2650
2651         /* really make sure rfkill handshake bits are cleared */
2652         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2653         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2654
2655         /* Copy original ucode data image from disk into backup cache.
2656          * This will be used to initialize the on-board processor's
2657          * data SRAM for a clean start when the runtime program first loads. */
2658         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2659                priv->ucode_data.len);
2660
2661         /* We return success when we resume from suspend and rf_kill is on. */
2662         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2663                 return 0;
2664
2665         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2666
2667                 iwl_clear_stations_table(priv);
2668
2669                 /* load bootstrap state machine,
2670                  * load bootstrap program into processor's memory,
2671                  * prepare to load the "initialize" uCode */
2672                 priv->cfg->ops->lib->load_ucode(priv);
2673
2674                 if (rc) {
2675                         IWL_ERR(priv,
2676                                 "Unable to set up bootstrap uCode: %d\n", rc);
2677                         continue;
2678                 }
2679
2680                 /* start card; "initialize" will load runtime ucode */
2681                 iwl3945_nic_start(priv);
2682
2683                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2684
2685                 return 0;
2686         }
2687
2688         set_bit(STATUS_EXIT_PENDING, &priv->status);
2689         __iwl3945_down(priv);
2690         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2691
2692         /* tried to restart and config the device for as long as our
2693          * patience could withstand */
2694         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2695         return -EIO;
2696 }
2697
2698
2699 /*****************************************************************************
2700  *
2701  * Workqueue callbacks
2702  *
2703  *****************************************************************************/
2704
2705 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2706 {
2707         struct iwl_priv *priv =
2708             container_of(data, struct iwl_priv, init_alive_start.work);
2709
2710         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2711                 return;
2712
2713         mutex_lock(&priv->mutex);
2714         iwl3945_init_alive_start(priv);
2715         mutex_unlock(&priv->mutex);
2716 }
2717
2718 static void iwl3945_bg_alive_start(struct work_struct *data)
2719 {
2720         struct iwl_priv *priv =
2721             container_of(data, struct iwl_priv, alive_start.work);
2722
2723         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2724                 return;
2725
2726         mutex_lock(&priv->mutex);
2727         iwl3945_alive_start(priv);
2728         mutex_unlock(&priv->mutex);
2729 }
2730
2731 static void iwl3945_rfkill_poll(struct work_struct *data)
2732 {
2733         struct iwl_priv *priv =
2734             container_of(data, struct iwl_priv, rfkill_poll.work);
2735
2736         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2737                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2738         else
2739                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2740
2741         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2742                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2743
2744         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2745                            round_jiffies_relative(2 * HZ));
2746
2747 }
2748
2749 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2750 static void iwl3945_bg_request_scan(struct work_struct *data)
2751 {
2752         struct iwl_priv *priv =
2753             container_of(data, struct iwl_priv, request_scan);
2754         struct iwl_host_cmd cmd = {
2755                 .id = REPLY_SCAN_CMD,
2756                 .len = sizeof(struct iwl3945_scan_cmd),
2757                 .flags = CMD_SIZE_HUGE,
2758         };
2759         int rc = 0;
2760         struct iwl3945_scan_cmd *scan;
2761         struct ieee80211_conf *conf = NULL;
2762         u8 n_probes = 0;
2763         enum ieee80211_band band;
2764         bool is_active = false;
2765
2766         conf = ieee80211_get_hw_conf(priv->hw);
2767
2768         mutex_lock(&priv->mutex);
2769
2770         cancel_delayed_work(&priv->scan_check);
2771
2772         if (!iwl_is_ready(priv)) {
2773                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2774                 goto done;
2775         }
2776
2777         /* Make sure the scan wasn't canceled before this queued work
2778          * was given the chance to run... */
2779         if (!test_bit(STATUS_SCANNING, &priv->status))
2780                 goto done;
2781
2782         /* This should never be called or scheduled if there is currently
2783          * a scan active in the hardware. */
2784         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2785                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2786                                 "Ignoring second request.\n");
2787                 rc = -EIO;
2788                 goto done;
2789         }
2790
2791         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2792                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2793                 goto done;
2794         }
2795
2796         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2797                 IWL_DEBUG_HC(priv,
2798                         "Scan request while abort pending. Queuing.\n");
2799                 goto done;
2800         }
2801
2802         if (iwl_is_rfkill(priv)) {
2803                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2804                 goto done;
2805         }
2806
2807         if (!test_bit(STATUS_READY, &priv->status)) {
2808                 IWL_DEBUG_HC(priv,
2809                         "Scan request while uninitialized. Queuing.\n");
2810                 goto done;
2811         }
2812
2813         if (!priv->scan_bands) {
2814                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2815                 goto done;
2816         }
2817
2818         if (!priv->scan) {
2819                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2820                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2821                 if (!priv->scan) {
2822                         rc = -ENOMEM;
2823                         goto done;
2824                 }
2825         }
2826         scan = priv->scan;
2827         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2828
2829         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2830         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2831
2832         if (iwl_is_associated(priv)) {
2833                 u16 interval = 0;
2834                 u32 extra;
2835                 u32 suspend_time = 100;
2836                 u32 scan_suspend_time = 100;
2837                 unsigned long flags;
2838
2839                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2840
2841                 spin_lock_irqsave(&priv->lock, flags);
2842                 interval = priv->beacon_int;
2843                 spin_unlock_irqrestore(&priv->lock, flags);
2844
2845                 scan->suspend_time = 0;
2846                 scan->max_out_time = cpu_to_le32(200 * 1024);
2847                 if (!interval)
2848                         interval = suspend_time;
2849                 /*
2850                  * suspend time format:
2851                  *  0-19: beacon interval in usec (time before exec.)
2852                  * 20-23: 0
2853                  * 24-31: number of beacons (suspend between channels)
2854                  */
2855
2856                 extra = (suspend_time / interval) << 24;
2857                 scan_suspend_time = 0xFF0FFFFF &
2858                     (extra | ((suspend_time % interval) * 1024));
2859
2860                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2861                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2862                                scan_suspend_time, interval);
2863         }
2864
2865         if (priv->scan_request->n_ssids) {
2866                 int i, p = 0;
2867                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2868                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2869                         /* always does wildcard anyway */
2870                         if (!priv->scan_request->ssids[i].ssid_len)
2871                                 continue;
2872                         scan->direct_scan[p].id = WLAN_EID_SSID;
2873                         scan->direct_scan[p].len =
2874                                 priv->scan_request->ssids[i].ssid_len;
2875                         memcpy(scan->direct_scan[p].ssid,
2876                                priv->scan_request->ssids[i].ssid,
2877                                priv->scan_request->ssids[i].ssid_len);
2878                         n_probes++;
2879                         p++;
2880                 }
2881                 is_active = true;
2882         } else
2883                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2884
2885         /* We don't build a direct scan probe request; the uCode will do
2886          * that based on the direct_mask added to each channel entry */
2887         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2888         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2889         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2890
2891         /* flags + rate selection */
2892
2893         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2894                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2895                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2896                 scan->good_CRC_th = 0;
2897                 band = IEEE80211_BAND_2GHZ;
2898         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2899                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2900                 /*
2901                  * If active scaning is requested but a certain channel
2902                  * is marked passive, we can do active scanning if we
2903                  * detect transmissions.
2904                  */
2905                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2906                 band = IEEE80211_BAND_5GHZ;
2907         } else {
2908                 IWL_WARN(priv, "Invalid scan band count\n");
2909                 goto done;
2910         }
2911
2912         scan->tx_cmd.len = cpu_to_le16(
2913                         iwl_fill_probe_req(priv,
2914                                 (struct ieee80211_mgmt *)scan->data,
2915                                 priv->scan_request->ie,
2916                                 priv->scan_request->ie_len,
2917                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2918
2919         /* select Rx antennas */
2920         scan->flags |= iwl3945_get_antenna_flags(priv);
2921
2922         if (iwl_is_monitor_mode(priv))
2923                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2924
2925         scan->channel_count =
2926                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2927                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2928
2929         if (scan->channel_count == 0) {
2930                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2931                 goto done;
2932         }
2933
2934         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2935             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2936         cmd.data = scan;
2937         scan->len = cpu_to_le16(cmd.len);
2938
2939         set_bit(STATUS_SCAN_HW, &priv->status);
2940         rc = iwl_send_cmd_sync(priv, &cmd);
2941         if (rc)
2942                 goto done;
2943
2944         queue_delayed_work(priv->workqueue, &priv->scan_check,
2945                            IWL_SCAN_CHECK_WATCHDOG);
2946
2947         mutex_unlock(&priv->mutex);
2948         return;
2949
2950  done:
2951         /* can not perform scan make sure we clear scanning
2952          * bits from status so next scan request can be performed.
2953          * if we dont clear scanning status bit here all next scan
2954          * will fail
2955         */
2956         clear_bit(STATUS_SCAN_HW, &priv->status);
2957         clear_bit(STATUS_SCANNING, &priv->status);
2958
2959         /* inform mac80211 scan aborted */
2960         queue_work(priv->workqueue, &priv->scan_completed);
2961         mutex_unlock(&priv->mutex);
2962 }
2963
2964 static void iwl3945_bg_up(struct work_struct *data)
2965 {
2966         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2967
2968         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2969                 return;
2970
2971         mutex_lock(&priv->mutex);
2972         __iwl3945_up(priv);
2973         mutex_unlock(&priv->mutex);
2974 }
2975
2976 static void iwl3945_bg_restart(struct work_struct *data)
2977 {
2978         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2979
2980         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2981                 return;
2982
2983         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2984                 mutex_lock(&priv->mutex);
2985                 priv->vif = NULL;
2986                 priv->is_open = 0;
2987                 mutex_unlock(&priv->mutex);
2988                 iwl3945_down(priv);
2989                 ieee80211_restart_hw(priv->hw);
2990         } else {
2991                 iwl3945_down(priv);
2992                 queue_work(priv->workqueue, &priv->up);
2993         }
2994 }
2995
2996 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2997 {
2998         struct iwl_priv *priv =
2999             container_of(data, struct iwl_priv, rx_replenish);
3000
3001         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3002                 return;
3003
3004         mutex_lock(&priv->mutex);
3005         iwl3945_rx_replenish(priv);
3006         mutex_unlock(&priv->mutex);
3007 }
3008
3009 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3010
3011 void iwl3945_post_associate(struct iwl_priv *priv)
3012 {
3013         int rc = 0;
3014         struct ieee80211_conf *conf = NULL;
3015
3016         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3017                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3018                 return;
3019         }
3020
3021
3022         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3023                         priv->assoc_id, priv->active_rxon.bssid_addr);
3024
3025         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3026                 return;
3027
3028         if (!priv->vif || !priv->is_open)
3029                 return;
3030
3031         iwl_scan_cancel_timeout(priv, 200);
3032
3033         conf = ieee80211_get_hw_conf(priv->hw);
3034
3035         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3036         iwlcore_commit_rxon(priv);
3037
3038         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3039         iwl_setup_rxon_timing(priv);
3040         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3041                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3042         if (rc)
3043                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3044                             "Attempting to continue.\n");
3045
3046         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3047
3048         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3049
3050         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3051                         priv->assoc_id, priv->beacon_int);
3052
3053         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3054                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3055         else
3056                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3057
3058         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3059                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3060                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3061                 else
3062                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3063
3064                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3065                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3066
3067         }
3068
3069         iwlcore_commit_rxon(priv);
3070
3071         switch (priv->iw_mode) {
3072         case NL80211_IFTYPE_STATION:
3073                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3074                 break;
3075
3076         case NL80211_IFTYPE_ADHOC:
3077
3078                 priv->assoc_id = 1;
3079                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3080                 iwl3945_sync_sta(priv, IWL_STA_ID,
3081                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3082                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3083                                  CMD_ASYNC);
3084                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3085                 iwl3945_send_beacon_cmd(priv);
3086
3087                 break;
3088
3089         default:
3090                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3091                            __func__, priv->iw_mode);
3092                 break;
3093         }
3094
3095         iwl_activate_qos(priv, 0);
3096
3097         /* we have just associated, don't start scan too early */
3098         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3099 }
3100
3101 /*****************************************************************************
3102  *
3103  * mac80211 entry point functions
3104  *
3105  *****************************************************************************/
3106
3107 #define UCODE_READY_TIMEOUT     (2 * HZ)
3108
3109 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3110 {
3111         struct iwl_priv *priv = hw->priv;
3112         int ret;
3113
3114         IWL_DEBUG_MAC80211(priv, "enter\n");
3115
3116         /* we should be verifying the device is ready to be opened */
3117         mutex_lock(&priv->mutex);
3118
3119         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3120          * ucode filename and max sizes are card-specific. */
3121
3122         if (!priv->ucode_code.len) {
3123                 ret = iwl3945_read_ucode(priv);
3124                 if (ret) {
3125                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3126                         mutex_unlock(&priv->mutex);
3127                         goto out_release_irq;
3128                 }
3129         }
3130
3131         ret = __iwl3945_up(priv);
3132
3133         mutex_unlock(&priv->mutex);
3134
3135         if (ret)
3136                 goto out_release_irq;
3137
3138         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3139
3140         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3141          * mac80211 will not be run successfully. */
3142         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3143                         test_bit(STATUS_READY, &priv->status),
3144                         UCODE_READY_TIMEOUT);
3145         if (!ret) {
3146                 if (!test_bit(STATUS_READY, &priv->status)) {
3147                         IWL_ERR(priv,
3148                                 "Wait for START_ALIVE timeout after %dms.\n",
3149                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3150                         ret = -ETIMEDOUT;
3151                         goto out_release_irq;
3152                 }
3153         }
3154
3155         /* ucode is running and will send rfkill notifications,
3156          * no need to poll the killswitch state anymore */
3157         cancel_delayed_work(&priv->rfkill_poll);
3158
3159         priv->is_open = 1;
3160         IWL_DEBUG_MAC80211(priv, "leave\n");
3161         return 0;
3162
3163 out_release_irq:
3164         priv->is_open = 0;
3165         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3166         return ret;
3167 }
3168
3169 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3170 {
3171         struct iwl_priv *priv = hw->priv;
3172
3173         IWL_DEBUG_MAC80211(priv, "enter\n");
3174
3175         if (!priv->is_open) {
3176                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3177                 return;
3178         }
3179
3180         priv->is_open = 0;
3181
3182         if (iwl_is_ready_rf(priv)) {
3183                 /* stop mac, cancel any scan request and clear
3184                  * RXON_FILTER_ASSOC_MSK BIT
3185                  */
3186                 mutex_lock(&priv->mutex);
3187                 iwl_scan_cancel_timeout(priv, 100);
3188                 mutex_unlock(&priv->mutex);
3189         }
3190
3191         iwl3945_down(priv);
3192
3193         flush_workqueue(priv->workqueue);
3194
3195         /* start polling the killswitch state again */
3196         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3197                            round_jiffies_relative(2 * HZ));
3198
3199         IWL_DEBUG_MAC80211(priv, "leave\n");
3200 }
3201
3202 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3203 {
3204         struct iwl_priv *priv = hw->priv;
3205
3206         IWL_DEBUG_MAC80211(priv, "enter\n");
3207
3208         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3209                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3210
3211         if (iwl3945_tx_skb(priv, skb))
3212                 dev_kfree_skb_any(skb);
3213
3214         IWL_DEBUG_MAC80211(priv, "leave\n");
3215         return NETDEV_TX_OK;
3216 }
3217
3218 void iwl3945_config_ap(struct iwl_priv *priv)
3219 {
3220         int rc = 0;
3221
3222         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3223                 return;
3224
3225         /* The following should be done only at AP bring up */
3226         if (!(iwl_is_associated(priv))) {
3227
3228                 /* RXON - unassoc (to set timing command) */
3229                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3230                 iwlcore_commit_rxon(priv);
3231
3232                 /* RXON Timing */
3233                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3234                 iwl_setup_rxon_timing(priv);
3235                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3236                                       sizeof(priv->rxon_timing),
3237                                       &priv->rxon_timing);
3238                 if (rc)
3239                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3240                                         "Attempting to continue.\n");
3241
3242                 /* FIXME: what should be the assoc_id for AP? */
3243                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3244                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3245                         priv->staging_rxon.flags |=
3246                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3247                 else
3248                         priv->staging_rxon.flags &=
3249                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3250
3251                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3252                         if (priv->assoc_capability &
3253                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3254                                 priv->staging_rxon.flags |=
3255                                         RXON_FLG_SHORT_SLOT_MSK;
3256                         else
3257                                 priv->staging_rxon.flags &=
3258                                         ~RXON_FLG_SHORT_SLOT_MSK;
3259
3260                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3261                                 priv->staging_rxon.flags &=
3262                                         ~RXON_FLG_SHORT_SLOT_MSK;
3263                 }
3264                 /* restore RXON assoc */
3265                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3266                 iwlcore_commit_rxon(priv);
3267                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3268         }
3269         iwl3945_send_beacon_cmd(priv);
3270
3271         /* FIXME - we need to add code here to detect a totally new
3272          * configuration, reset the AP, unassoc, rxon timing, assoc,
3273          * clear sta table, add BCAST sta... */
3274 }
3275
3276 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3277                                struct ieee80211_vif *vif,
3278                                struct ieee80211_sta *sta,
3279                                struct ieee80211_key_conf *key)
3280 {
3281         struct iwl_priv *priv = hw->priv;
3282         const u8 *addr;
3283         int ret = 0;
3284         u8 sta_id = IWL_INVALID_STATION;
3285         u8 static_key;
3286
3287         IWL_DEBUG_MAC80211(priv, "enter\n");
3288
3289         if (iwl3945_mod_params.sw_crypto) {
3290                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3291                 return -EOPNOTSUPP;
3292         }
3293
3294         addr = sta ? sta->addr : iwl_bcast_addr;
3295         static_key = !iwl_is_associated(priv);
3296
3297         if (!static_key) {
3298                 sta_id = iwl_find_station(priv, addr);
3299                 if (sta_id == IWL_INVALID_STATION) {
3300                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3301                                             addr);
3302                         return -EINVAL;
3303                 }
3304         }
3305
3306         mutex_lock(&priv->mutex);
3307         iwl_scan_cancel_timeout(priv, 100);
3308         mutex_unlock(&priv->mutex);
3309
3310         switch (cmd) {
3311         case SET_KEY:
3312                 if (static_key)
3313                         ret = iwl3945_set_static_key(priv, key);
3314                 else
3315                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3316                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3317                 break;
3318         case DISABLE_KEY:
3319                 if (static_key)
3320                         ret = iwl3945_remove_static_key(priv);
3321                 else
3322                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3323                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3324                 break;
3325         default:
3326                 ret = -EINVAL;
3327         }
3328
3329         IWL_DEBUG_MAC80211(priv, "leave\n");
3330
3331         return ret;
3332 }
3333
3334 /*****************************************************************************
3335  *
3336  * sysfs attributes
3337  *
3338  *****************************************************************************/
3339
3340 #ifdef CONFIG_IWLWIFI_DEBUG
3341
3342 /*
3343  * The following adds a new attribute to the sysfs representation
3344  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3345  * used for controlling the debug level.
3346  *
3347  * See the level definitions in iwl for details.
3348  *
3349  * The debug_level being managed using sysfs below is a per device debug
3350  * level that is used instead of the global debug level if it (the per
3351  * device debug level) is set.
3352  */
3353 static ssize_t show_debug_level(struct device *d,
3354                                 struct device_attribute *attr, char *buf)
3355 {
3356         struct iwl_priv *priv = dev_get_drvdata(d);
3357         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3358 }
3359 static ssize_t store_debug_level(struct device *d,
3360                                 struct device_attribute *attr,
3361                                  const char *buf, size_t count)
3362 {
3363         struct iwl_priv *priv = dev_get_drvdata(d);
3364         unsigned long val;
3365         int ret;
3366
3367         ret = strict_strtoul(buf, 0, &val);
3368         if (ret)
3369                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3370         else {
3371                 priv->debug_level = val;
3372                 if (iwl_alloc_traffic_mem(priv))
3373                         IWL_ERR(priv,
3374                                 "Not enough memory to generate traffic log\n");
3375         }
3376         return strnlen(buf, count);
3377 }
3378
3379 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3380                         show_debug_level, store_debug_level);
3381
3382 #endif /* CONFIG_IWLWIFI_DEBUG */
3383
3384 static ssize_t show_temperature(struct device *d,
3385                                 struct device_attribute *attr, char *buf)
3386 {
3387         struct iwl_priv *priv = dev_get_drvdata(d);
3388
3389         if (!iwl_is_alive(priv))
3390                 return -EAGAIN;
3391
3392         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3393 }
3394
3395 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3396
3397 static ssize_t show_tx_power(struct device *d,
3398                              struct device_attribute *attr, char *buf)
3399 {
3400         struct iwl_priv *priv = dev_get_drvdata(d);
3401         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3402 }
3403
3404 static ssize_t store_tx_power(struct device *d,
3405                               struct device_attribute *attr,
3406                               const char *buf, size_t count)
3407 {
3408         struct iwl_priv *priv = dev_get_drvdata(d);
3409         char *p = (char *)buf;
3410         u32 val;
3411
3412         val = simple_strtoul(p, &p, 10);
3413         if (p == buf)
3414                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3415         else
3416                 iwl3945_hw_reg_set_txpower(priv, val);
3417
3418         return count;
3419 }
3420
3421 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3422
3423 static ssize_t show_flags(struct device *d,
3424                           struct device_attribute *attr, char *buf)
3425 {
3426         struct iwl_priv *priv = dev_get_drvdata(d);
3427
3428         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3429 }
3430
3431 static ssize_t store_flags(struct device *d,
3432                            struct device_attribute *attr,
3433                            const char *buf, size_t count)
3434 {
3435         struct iwl_priv *priv = dev_get_drvdata(d);
3436         u32 flags = simple_strtoul(buf, NULL, 0);
3437
3438         mutex_lock(&priv->mutex);
3439         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3440                 /* Cancel any currently running scans... */
3441                 if (iwl_scan_cancel_timeout(priv, 100))
3442                         IWL_WARN(priv, "Could not cancel scan.\n");
3443                 else {
3444                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3445                                        flags);
3446                         priv->staging_rxon.flags = cpu_to_le32(flags);
3447                         iwlcore_commit_rxon(priv);
3448                 }
3449         }
3450         mutex_unlock(&priv->mutex);
3451
3452         return count;
3453 }
3454
3455 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3456
3457 static ssize_t show_filter_flags(struct device *d,
3458                                  struct device_attribute *attr, char *buf)
3459 {
3460         struct iwl_priv *priv = dev_get_drvdata(d);
3461
3462         return sprintf(buf, "0x%04X\n",
3463                 le32_to_cpu(priv->active_rxon.filter_flags));
3464 }
3465
3466 static ssize_t store_filter_flags(struct device *d,
3467                                   struct device_attribute *attr,
3468                                   const char *buf, size_t count)
3469 {
3470         struct iwl_priv *priv = dev_get_drvdata(d);
3471         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3472
3473         mutex_lock(&priv->mutex);
3474         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3475                 /* Cancel any currently running scans... */
3476                 if (iwl_scan_cancel_timeout(priv, 100))
3477                         IWL_WARN(priv, "Could not cancel scan.\n");
3478                 else {
3479                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3480                                        "0x%04X\n", filter_flags);
3481                         priv->staging_rxon.filter_flags =
3482                                 cpu_to_le32(filter_flags);
3483                         iwlcore_commit_rxon(priv);
3484                 }
3485         }
3486         mutex_unlock(&priv->mutex);
3487
3488         return count;
3489 }
3490
3491 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3492                    store_filter_flags);
3493
3494 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3495
3496 static ssize_t show_measurement(struct device *d,
3497                                 struct device_attribute *attr, char *buf)
3498 {
3499         struct iwl_priv *priv = dev_get_drvdata(d);
3500         struct iwl_spectrum_notification measure_report;
3501         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3502         u8 *data = (u8 *)&measure_report;
3503         unsigned long flags;
3504
3505         spin_lock_irqsave(&priv->lock, flags);
3506         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3507                 spin_unlock_irqrestore(&priv->lock, flags);
3508                 return 0;
3509         }
3510         memcpy(&measure_report, &priv->measure_report, size);
3511         priv->measurement_status = 0;
3512         spin_unlock_irqrestore(&priv->lock, flags);
3513
3514         while (size && (PAGE_SIZE - len)) {
3515                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3516                                    PAGE_SIZE - len, 1);
3517                 len = strlen(buf);
3518                 if (PAGE_SIZE - len)
3519                         buf[len++] = '\n';
3520
3521                 ofs += 16;
3522                 size -= min(size, 16U);
3523         }
3524
3525         return len;
3526 }
3527
3528 static ssize_t store_measurement(struct device *d,
3529                                  struct device_attribute *attr,
3530                                  const char *buf, size_t count)
3531 {
3532         struct iwl_priv *priv = dev_get_drvdata(d);
3533         struct ieee80211_measurement_params params = {
3534                 .channel = le16_to_cpu(priv->active_rxon.channel),
3535                 .start_time = cpu_to_le64(priv->last_tsf),
3536                 .duration = cpu_to_le16(1),
3537         };
3538         u8 type = IWL_MEASURE_BASIC;
3539         u8 buffer[32];
3540         u8 channel;
3541
3542         if (count) {
3543                 char *p = buffer;
3544                 strncpy(buffer, buf, min(sizeof(buffer), count));
3545                 channel = simple_strtoul(p, NULL, 0);
3546                 if (channel)
3547                         params.channel = channel;
3548
3549                 p = buffer;
3550                 while (*p && *p != ' ')
3551                         p++;
3552                 if (*p)
3553                         type = simple_strtoul(p + 1, NULL, 0);
3554         }
3555
3556         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3557                        "channel %d (for '%s')\n", type, params.channel, buf);
3558         iwl3945_get_measurement(priv, &params, type);
3559
3560         return count;
3561 }
3562
3563 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3564                    show_measurement, store_measurement);
3565 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3566
3567 static ssize_t store_retry_rate(struct device *d,
3568                                 struct device_attribute *attr,
3569                                 const char *buf, size_t count)
3570 {
3571         struct iwl_priv *priv = dev_get_drvdata(d);
3572
3573         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3574         if (priv->retry_rate <= 0)
3575                 priv->retry_rate = 1;
3576
3577         return count;
3578 }
3579
3580 static ssize_t show_retry_rate(struct device *d,
3581                                struct device_attribute *attr, char *buf)
3582 {
3583         struct iwl_priv *priv = dev_get_drvdata(d);
3584         return sprintf(buf, "%d", priv->retry_rate);
3585 }
3586
3587 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3588                    store_retry_rate);
3589
3590
3591 static ssize_t show_channels(struct device *d,
3592                              struct device_attribute *attr, char *buf)
3593 {
3594         /* all this shit doesn't belong into sysfs anyway */
3595         return 0;
3596 }
3597
3598 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3599
3600 static ssize_t show_statistics(struct device *d,
3601                                struct device_attribute *attr, char *buf)
3602 {
3603         struct iwl_priv *priv = dev_get_drvdata(d);
3604         u32 size = sizeof(struct iwl3945_notif_statistics);
3605         u32 len = 0, ofs = 0;
3606         u8 *data = (u8 *)&priv->statistics_39;
3607         int rc = 0;
3608
3609         if (!iwl_is_alive(priv))
3610                 return -EAGAIN;
3611
3612         mutex_lock(&priv->mutex);
3613         rc = iwl_send_statistics_request(priv, 0);
3614         mutex_unlock(&priv->mutex);
3615
3616         if (rc) {
3617                 len = sprintf(buf,
3618                               "Error sending statistics request: 0x%08X\n", rc);
3619                 return len;
3620         }
3621
3622         while (size && (PAGE_SIZE - len)) {
3623                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3624                                    PAGE_SIZE - len, 1);
3625                 len = strlen(buf);
3626                 if (PAGE_SIZE - len)
3627                         buf[len++] = '\n';
3628
3629                 ofs += 16;
3630                 size -= min(size, 16U);
3631         }
3632
3633         return len;
3634 }
3635
3636 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3637
3638 static ssize_t show_antenna(struct device *d,
3639                             struct device_attribute *attr, char *buf)
3640 {
3641         struct iwl_priv *priv = dev_get_drvdata(d);
3642
3643         if (!iwl_is_alive(priv))
3644                 return -EAGAIN;
3645
3646         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3647 }
3648
3649 static ssize_t store_antenna(struct device *d,
3650                              struct device_attribute *attr,
3651                              const char *buf, size_t count)
3652 {
3653         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3654         int ant;
3655
3656         if (count == 0)
3657                 return 0;
3658
3659         if (sscanf(buf, "%1i", &ant) != 1) {
3660                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3661                 return count;
3662         }
3663
3664         if ((ant >= 0) && (ant <= 2)) {
3665                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3666                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3667         } else
3668                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3669
3670
3671         return count;
3672 }
3673
3674 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3675
3676 static ssize_t show_status(struct device *d,
3677                            struct device_attribute *attr, char *buf)
3678 {
3679         struct iwl_priv *priv = dev_get_drvdata(d);
3680         if (!iwl_is_alive(priv))
3681                 return -EAGAIN;
3682         return sprintf(buf, "0x%08x\n", (int)priv->status);
3683 }
3684
3685 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3686
3687 static ssize_t dump_error_log(struct device *d,
3688                               struct device_attribute *attr,
3689                               const char *buf, size_t count)
3690 {
3691         struct iwl_priv *priv = dev_get_drvdata(d);
3692         char *p = (char *)buf;
3693
3694         if (p[0] == '1')
3695                 iwl3945_dump_nic_error_log(priv);
3696
3697         return strnlen(buf, count);
3698 }
3699
3700 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3701
3702 /*****************************************************************************
3703  *
3704  * driver setup and tear down
3705  *
3706  *****************************************************************************/
3707
3708 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3709 {
3710         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3711
3712         init_waitqueue_head(&priv->wait_command_queue);
3713
3714         INIT_WORK(&priv->up, iwl3945_bg_up);
3715         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3716         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3717         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3718         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3719         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3720         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3721         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3722         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3723         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3724         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3725
3726         iwl3945_hw_setup_deferred_work(priv);
3727
3728         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3729                      iwl3945_irq_tasklet, (unsigned long)priv);
3730 }
3731
3732 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3733 {
3734         iwl3945_hw_cancel_deferred_work(priv);
3735
3736         cancel_delayed_work_sync(&priv->init_alive_start);
3737         cancel_delayed_work(&priv->scan_check);
3738         cancel_delayed_work(&priv->alive_start);
3739         cancel_work_sync(&priv->beacon_update);
3740 }
3741
3742 static struct attribute *iwl3945_sysfs_entries[] = {
3743         &dev_attr_antenna.attr,
3744         &dev_attr_channels.attr,
3745         &dev_attr_dump_errors.attr,
3746         &dev_attr_flags.attr,
3747         &dev_attr_filter_flags.attr,
3748 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3749         &dev_attr_measurement.attr,
3750 #endif
3751         &dev_attr_retry_rate.attr,
3752         &dev_attr_statistics.attr,
3753         &dev_attr_status.attr,
3754         &dev_attr_temperature.attr,
3755         &dev_attr_tx_power.attr,
3756 #ifdef CONFIG_IWLWIFI_DEBUG
3757         &dev_attr_debug_level.attr,
3758 #endif
3759         NULL
3760 };
3761
3762 static struct attribute_group iwl3945_attribute_group = {
3763         .name = NULL,           /* put in device directory */
3764         .attrs = iwl3945_sysfs_entries,
3765 };
3766
3767 static struct ieee80211_ops iwl3945_hw_ops = {
3768         .tx = iwl3945_mac_tx,
3769         .start = iwl3945_mac_start,
3770         .stop = iwl3945_mac_stop,
3771         .add_interface = iwl_mac_add_interface,
3772         .remove_interface = iwl_mac_remove_interface,
3773         .config = iwl_mac_config,
3774         .configure_filter = iwl_configure_filter,
3775         .set_key = iwl3945_mac_set_key,
3776         .get_tx_stats = iwl_mac_get_tx_stats,
3777         .conf_tx = iwl_mac_conf_tx,
3778         .reset_tsf = iwl_mac_reset_tsf,
3779         .bss_info_changed = iwl_bss_info_changed,
3780         .hw_scan = iwl_mac_hw_scan
3781 };
3782
3783 static int iwl3945_init_drv(struct iwl_priv *priv)
3784 {
3785         int ret;
3786         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3787
3788         priv->retry_rate = 1;
3789         priv->ibss_beacon = NULL;
3790
3791         spin_lock_init(&priv->lock);
3792         spin_lock_init(&priv->sta_lock);
3793         spin_lock_init(&priv->hcmd_lock);
3794
3795         INIT_LIST_HEAD(&priv->free_frames);
3796
3797         mutex_init(&priv->mutex);
3798
3799         /* Clear the driver's (not device's) station table */
3800         iwl_clear_stations_table(priv);
3801
3802         priv->data_retry_limit = -1;
3803         priv->ieee_channels = NULL;
3804         priv->ieee_rates = NULL;
3805         priv->band = IEEE80211_BAND_2GHZ;
3806
3807         priv->iw_mode = NL80211_IFTYPE_STATION;
3808
3809         iwl_reset_qos(priv);
3810
3811         priv->qos_data.qos_active = 0;
3812         priv->qos_data.qos_cap.val = 0;
3813
3814         priv->rates_mask = IWL_RATES_MASK;
3815         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3816
3817         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3818                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3819                          eeprom->version);
3820                 ret = -EINVAL;
3821                 goto err;
3822         }
3823         ret = iwl_init_channel_map(priv);
3824         if (ret) {
3825                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3826                 goto err;
3827         }
3828
3829         /* Set up txpower settings in driver for all channels */
3830         if (iwl3945_txpower_set_from_eeprom(priv)) {
3831                 ret = -EIO;
3832                 goto err_free_channel_map;
3833         }
3834
3835         ret = iwlcore_init_geos(priv);
3836         if (ret) {
3837                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3838                 goto err_free_channel_map;
3839         }
3840         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3841
3842         return 0;
3843
3844 err_free_channel_map:
3845         iwl_free_channel_map(priv);
3846 err:
3847         return ret;
3848 }
3849
3850 static int iwl3945_setup_mac(struct iwl_priv *priv)
3851 {
3852         int ret;
3853         struct ieee80211_hw *hw = priv->hw;
3854
3855         hw->rate_control_algorithm = "iwl-3945-rs";
3856         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3857
3858         /* Tell mac80211 our characteristics */
3859         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3860                     IEEE80211_HW_NOISE_DBM |
3861                     IEEE80211_HW_SPECTRUM_MGMT |
3862                     IEEE80211_HW_SUPPORTS_PS |
3863                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3864
3865         hw->wiphy->interface_modes =
3866                 BIT(NL80211_IFTYPE_STATION) |
3867                 BIT(NL80211_IFTYPE_ADHOC);
3868
3869         hw->wiphy->custom_regulatory = true;
3870
3871         /* Firmware does not support this */
3872         hw->wiphy->disable_beacon_hints = true;
3873
3874         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3875         /* we create the 802.11 header and a zero-length SSID element */
3876         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3877
3878         /* Default value; 4 EDCA QOS priorities */
3879         hw->queues = 4;
3880
3881         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3882                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3883                         &priv->bands[IEEE80211_BAND_2GHZ];
3884
3885         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3886                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3887                         &priv->bands[IEEE80211_BAND_5GHZ];
3888
3889         ret = ieee80211_register_hw(priv->hw);
3890         if (ret) {
3891                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3892                 return ret;
3893         }
3894         priv->mac80211_registered = 1;
3895
3896         return 0;
3897 }
3898
3899 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3900 {
3901         int err = 0;
3902         struct iwl_priv *priv;
3903         struct ieee80211_hw *hw;
3904         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3905         struct iwl3945_eeprom *eeprom;
3906         unsigned long flags;
3907
3908         /***********************
3909          * 1. Allocating HW data
3910          * ********************/
3911
3912         /* mac80211 allocates memory for this device instance, including
3913          *   space for this driver's private structure */
3914         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3915         if (hw == NULL) {
3916                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3917                 err = -ENOMEM;
3918                 goto out;
3919         }
3920         priv = hw->priv;
3921         SET_IEEE80211_DEV(hw, &pdev->dev);
3922
3923         /*
3924          * Disabling hardware scan means that mac80211 will perform scans
3925          * "the hard way", rather than using device's scan.
3926          */
3927         if (iwl3945_mod_params.disable_hw_scan) {
3928                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3929                 iwl3945_hw_ops.hw_scan = NULL;
3930         }
3931
3932
3933         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3934         priv->cfg = cfg;
3935         priv->pci_dev = pdev;
3936         priv->inta_mask = CSR_INI_SET_MASK;
3937
3938 #ifdef CONFIG_IWLWIFI_DEBUG
3939         atomic_set(&priv->restrict_refcnt, 0);
3940 #endif
3941         if (iwl_alloc_traffic_mem(priv))
3942                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3943
3944         /***************************
3945          * 2. Initializing PCI bus
3946          * *************************/
3947         if (pci_enable_device(pdev)) {
3948                 err = -ENODEV;
3949                 goto out_ieee80211_free_hw;
3950         }
3951
3952         pci_set_master(pdev);
3953
3954         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3955         if (!err)
3956                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3957         if (err) {
3958                 IWL_WARN(priv, "No suitable DMA available.\n");
3959                 goto out_pci_disable_device;
3960         }
3961
3962         pci_set_drvdata(pdev, priv);
3963         err = pci_request_regions(pdev, DRV_NAME);
3964         if (err)
3965                 goto out_pci_disable_device;
3966
3967         /***********************
3968          * 3. Read REV Register
3969          * ********************/
3970         priv->hw_base = pci_iomap(pdev, 0, 0);
3971         if (!priv->hw_base) {
3972                 err = -ENODEV;
3973                 goto out_pci_release_regions;
3974         }
3975
3976         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3977                         (unsigned long long) pci_resource_len(pdev, 0));
3978         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3979
3980         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3981          * PCI Tx retries from interfering with C3 CPU state */
3982         pci_write_config_byte(pdev, 0x41, 0x00);
3983
3984         /* this spin lock will be used in apm_ops.init and EEPROM access
3985          * we should init now
3986          */
3987         spin_lock_init(&priv->reg_lock);
3988
3989         /* amp init */
3990         err = priv->cfg->ops->lib->apm_ops.init(priv);
3991         if (err < 0) {
3992                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
3993                 goto out_iounmap;
3994         }
3995
3996         /***********************
3997          * 4. Read EEPROM
3998          * ********************/
3999
4000         /* Read the EEPROM */
4001         err = iwl_eeprom_init(priv);
4002         if (err) {
4003                 IWL_ERR(priv, "Unable to init EEPROM\n");
4004                 goto out_iounmap;
4005         }
4006         /* MAC Address location in EEPROM same for 3945/4965 */
4007         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4008         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4009         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4010         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4011
4012         /***********************
4013          * 5. Setup HW Constants
4014          * ********************/
4015         /* Device-specific setup */
4016         if (iwl3945_hw_set_hw_params(priv)) {
4017                 IWL_ERR(priv, "failed to set hw settings\n");
4018                 goto out_eeprom_free;
4019         }
4020
4021         /***********************
4022          * 6. Setup priv
4023          * ********************/
4024
4025         err = iwl3945_init_drv(priv);
4026         if (err) {
4027                 IWL_ERR(priv, "initializing driver failed\n");
4028                 goto out_unset_hw_params;
4029         }
4030
4031         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4032                 priv->cfg->name);
4033
4034         /***********************
4035          * 7. Setup Services
4036          * ********************/
4037
4038         spin_lock_irqsave(&priv->lock, flags);
4039         iwl_disable_interrupts(priv);
4040         spin_unlock_irqrestore(&priv->lock, flags);
4041
4042         pci_enable_msi(priv->pci_dev);
4043
4044         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4045                           IRQF_SHARED, DRV_NAME, priv);
4046         if (err) {
4047                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4048                 goto out_disable_msi;
4049         }
4050
4051         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4052         if (err) {
4053                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4054                 goto out_release_irq;
4055         }
4056
4057         iwl_set_rxon_channel(priv,
4058                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4059         iwl3945_setup_deferred_work(priv);
4060         iwl3945_setup_rx_handlers(priv);
4061
4062         /*********************************
4063          * 8. Setup and Register mac80211
4064          * *******************************/
4065
4066         iwl_enable_interrupts(priv);
4067
4068         err = iwl3945_setup_mac(priv);
4069         if (err)
4070                 goto  out_remove_sysfs;
4071
4072         err = iwl_dbgfs_register(priv, DRV_NAME);
4073         if (err)
4074                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4075
4076         /* Start monitoring the killswitch */
4077         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4078                            2 * HZ);
4079
4080         return 0;
4081
4082  out_remove_sysfs:
4083         destroy_workqueue(priv->workqueue);
4084         priv->workqueue = NULL;
4085         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4086  out_release_irq:
4087         free_irq(priv->pci_dev->irq, priv);
4088  out_disable_msi:
4089         pci_disable_msi(priv->pci_dev);
4090         iwlcore_free_geos(priv);
4091         iwl_free_channel_map(priv);
4092  out_unset_hw_params:
4093         iwl3945_unset_hw_params(priv);
4094  out_eeprom_free:
4095         iwl_eeprom_free(priv);
4096  out_iounmap:
4097         pci_iounmap(pdev, priv->hw_base);
4098  out_pci_release_regions:
4099         pci_release_regions(pdev);
4100  out_pci_disable_device:
4101         pci_set_drvdata(pdev, NULL);
4102         pci_disable_device(pdev);
4103  out_ieee80211_free_hw:
4104         ieee80211_free_hw(priv->hw);
4105         iwl_free_traffic_mem(priv);
4106  out:
4107         return err;
4108 }
4109
4110 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4111 {
4112         struct iwl_priv *priv = pci_get_drvdata(pdev);
4113         unsigned long flags;
4114
4115         if (!priv)
4116                 return;
4117
4118         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4119
4120         iwl_dbgfs_unregister(priv);
4121
4122         set_bit(STATUS_EXIT_PENDING, &priv->status);
4123
4124         if (priv->mac80211_registered) {
4125                 ieee80211_unregister_hw(priv->hw);
4126                 priv->mac80211_registered = 0;
4127         } else {
4128                 iwl3945_down(priv);
4129         }
4130
4131         /* make sure we flush any pending irq or
4132          * tasklet for the driver
4133          */
4134         spin_lock_irqsave(&priv->lock, flags);
4135         iwl_disable_interrupts(priv);
4136         spin_unlock_irqrestore(&priv->lock, flags);
4137
4138         iwl_synchronize_irq(priv);
4139
4140         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4141
4142         cancel_delayed_work_sync(&priv->rfkill_poll);
4143
4144         iwl3945_dealloc_ucode_pci(priv);
4145
4146         if (priv->rxq.bd)
4147                 iwl3945_rx_queue_free(priv, &priv->rxq);
4148         iwl3945_hw_txq_ctx_free(priv);
4149
4150         iwl3945_unset_hw_params(priv);
4151         iwl_clear_stations_table(priv);
4152
4153         /*netif_stop_queue(dev); */
4154         flush_workqueue(priv->workqueue);
4155
4156         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4157          * priv->workqueue... so we can't take down the workqueue
4158          * until now... */
4159         destroy_workqueue(priv->workqueue);
4160         priv->workqueue = NULL;
4161         iwl_free_traffic_mem(priv);
4162
4163         free_irq(pdev->irq, priv);
4164         pci_disable_msi(pdev);
4165
4166         pci_iounmap(pdev, priv->hw_base);
4167         pci_release_regions(pdev);
4168         pci_disable_device(pdev);
4169         pci_set_drvdata(pdev, NULL);
4170
4171         iwl_free_channel_map(priv);
4172         iwlcore_free_geos(priv);
4173         kfree(priv->scan);
4174         if (priv->ibss_beacon)
4175                 dev_kfree_skb(priv->ibss_beacon);
4176
4177         ieee80211_free_hw(priv->hw);
4178 }
4179
4180
4181 /*****************************************************************************
4182  *
4183  * driver and module entry point
4184  *
4185  *****************************************************************************/
4186
4187 static struct pci_driver iwl3945_driver = {
4188         .name = DRV_NAME,
4189         .id_table = iwl3945_hw_card_ids,
4190         .probe = iwl3945_pci_probe,
4191         .remove = __devexit_p(iwl3945_pci_remove),
4192 #ifdef CONFIG_PM
4193         .suspend = iwl_pci_suspend,
4194         .resume = iwl_pci_resume,
4195 #endif
4196 };
4197
4198 static int __init iwl3945_init(void)
4199 {
4200
4201         int ret;
4202         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4203         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4204
4205         ret = iwl3945_rate_control_register();
4206         if (ret) {
4207                 printk(KERN_ERR DRV_NAME
4208                        "Unable to register rate control algorithm: %d\n", ret);
4209                 return ret;
4210         }
4211
4212         ret = pci_register_driver(&iwl3945_driver);
4213         if (ret) {
4214                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4215                 goto error_register;
4216         }
4217
4218         return ret;
4219
4220 error_register:
4221         iwl3945_rate_control_unregister();
4222         return ret;
4223 }
4224
4225 static void __exit iwl3945_exit(void)
4226 {
4227         pci_unregister_driver(&iwl3945_driver);
4228         iwl3945_rate_control_unregister();
4229 }
4230
4231 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4232
4233 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4234 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4235 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4236 MODULE_PARM_DESC(swcrypto,
4237                  "using software crypto (default 1 [software])\n");
4238 #ifdef CONFIG_IWLWIFI_DEBUG
4239 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4240 MODULE_PARM_DESC(debug, "debug output mask");
4241 #endif
4242 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4243                    int, S_IRUGO);
4244 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4245 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4246 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4247
4248 module_exit(iwl3945_exit);
4249 module_init(iwl3945_init);