iwlwifi: DMA fixes
[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/lib80211.h>
45 #include <net/mac80211.h>
46
47 #include <asm/div64.h>
48
49 #define DRV_NAME        "iwl3945"
50
51 #include "iwl-fh.h"
52 #include "iwl-3945-fh.h"
53 #include "iwl-commands.h"
54 #include "iwl-sta.h"
55 #include "iwl-3945.h"
56 #include "iwl-helpers.h"
57 #include "iwl-core.h"
58 #include "iwl-dev.h"
59
60 /*
61  * module name, copyright, version, etc.
62  */
63
64 #define DRV_DESCRIPTION \
65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
66
67 #ifdef CONFIG_IWLWIFI_DEBUG
68 #define VD "d"
69 #else
70 #define VD
71 #endif
72
73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
74 #define VS "s"
75 #else
76 #define VS
77 #endif
78
79 #define IWL39_VERSION "1.2.26k" VD VS
80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
82 #define DRV_VERSION     IWL39_VERSION
83
84
85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
86 MODULE_VERSION(DRV_VERSION);
87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
88 MODULE_LICENSE("GPL");
89
90  /* module parameters */
91 struct iwl_mod_params iwl3945_mod_params = {
92         .num_of_queues = IWL39_MAX_NUM_QUEUES,
93         .sw_crypto = 1,
94         .restart_fw = 1,
95         /* the rest are 0 by default */
96 };
97
98 /*************** STATION TABLE MANAGEMENT ****
99  * mac80211 should be examined to determine if sta_info is duplicating
100  * the functionality provided here
101  */
102
103 /**************************************************************/
104 #if 0 /* temporary disable till we add real remove station */
105 /**
106  * iwl3945_remove_station - Remove driver's knowledge of station.
107  *
108  * NOTE:  This does not remove station from device's station table.
109  */
110 static u8 iwl3945_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
111 {
112         int index = IWL_INVALID_STATION;
113         int i;
114         unsigned long flags;
115
116         spin_lock_irqsave(&priv->sta_lock, flags);
117
118         if (is_ap)
119                 index = IWL_AP_ID;
120         else if (is_broadcast_ether_addr(addr))
121                 index = priv->hw_params.bcast_sta_id;
122         else
123                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
124                         if (priv->stations_39[i].used &&
125                             !compare_ether_addr(priv->stations_39[i].sta.sta.addr,
126                                                 addr)) {
127                                 index = i;
128                                 break;
129                         }
130
131         if (unlikely(index == IWL_INVALID_STATION))
132                 goto out;
133
134         if (priv->stations_39[index].used) {
135                 priv->stations_39[index].used = 0;
136                 priv->num_stations--;
137         }
138
139         BUG_ON(priv->num_stations < 0);
140
141 out:
142         spin_unlock_irqrestore(&priv->sta_lock, flags);
143         return 0;
144 }
145 #endif
146
147 /**
148  * iwl3945_clear_stations_table - Clear the driver's station table
149  *
150  * NOTE:  This does not clear or otherwise alter the device's station table.
151  */
152 static void iwl3945_clear_stations_table(struct iwl_priv *priv)
153 {
154         unsigned long flags;
155
156         spin_lock_irqsave(&priv->sta_lock, flags);
157
158         priv->num_stations = 0;
159         memset(priv->stations_39, 0, sizeof(priv->stations_39));
160
161         spin_unlock_irqrestore(&priv->sta_lock, flags);
162 }
163
164 /**
165  * iwl3945_add_station - Add station to station tables in driver and device
166  */
167 u8 iwl3945_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
168 {
169         int i;
170         int index = IWL_INVALID_STATION;
171         struct iwl3945_station_entry *station;
172         unsigned long flags_spin;
173         u8 rate;
174
175         spin_lock_irqsave(&priv->sta_lock, flags_spin);
176         if (is_ap)
177                 index = IWL_AP_ID;
178         else if (is_broadcast_ether_addr(addr))
179                 index = priv->hw_params.bcast_sta_id;
180         else
181                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
182                         if (!compare_ether_addr(priv->stations_39[i].sta.sta.addr,
183                                                 addr)) {
184                                 index = i;
185                                 break;
186                         }
187
188                         if (!priv->stations_39[i].used &&
189                             index == IWL_INVALID_STATION)
190                                 index = i;
191                 }
192
193         /* These two conditions has the same outcome but keep them separate
194           since they have different meaning */
195         if (unlikely(index == IWL_INVALID_STATION)) {
196                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
197                 return index;
198         }
199
200         if (priv->stations_39[index].used &&
201            !compare_ether_addr(priv->stations_39[index].sta.sta.addr, addr)) {
202                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
203                 return index;
204         }
205
206         IWL_DEBUG_ASSOC(priv, "Add STA ID %d: %pM\n", index, addr);
207         station = &priv->stations_39[index];
208         station->used = 1;
209         priv->num_stations++;
210
211         /* Set up the REPLY_ADD_STA command to send to device */
212         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
213         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
214         station->sta.mode = 0;
215         station->sta.sta.sta_id = index;
216         station->sta.station_flags = 0;
217
218         if (priv->band == IEEE80211_BAND_5GHZ)
219                 rate = IWL_RATE_6M_PLCP;
220         else
221                 rate =  IWL_RATE_1M_PLCP;
222
223         /* Turn on both antennas for the station... */
224         station->sta.rate_n_flags =
225                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
226
227         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
228
229         /* Add station to device's station table */
230         iwl_send_add_sta(priv,
231                          (struct iwl_addsta_cmd *)&station->sta, flags);
232         return index;
233
234 }
235
236 static int iwl3945_send_rxon_assoc(struct iwl_priv *priv)
237 {
238         int rc = 0;
239         struct iwl_rx_packet *res = NULL;
240         struct iwl3945_rxon_assoc_cmd rxon_assoc;
241         struct iwl_host_cmd cmd = {
242                 .id = REPLY_RXON_ASSOC,
243                 .len = sizeof(rxon_assoc),
244                 .meta.flags = CMD_WANT_SKB,
245                 .data = &rxon_assoc,
246         };
247         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
248         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
249
250         if ((rxon1->flags == rxon2->flags) &&
251             (rxon1->filter_flags == rxon2->filter_flags) &&
252             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
253             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
254                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
255                 return 0;
256         }
257
258         rxon_assoc.flags = priv->staging_rxon.flags;
259         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
260         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
261         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
262         rxon_assoc.reserved = 0;
263
264         rc = iwl_send_cmd_sync(priv, &cmd);
265         if (rc)
266                 return rc;
267
268         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
269         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
270                 IWL_ERR(priv, "Bad return from REPLY_RXON_ASSOC command\n");
271                 rc = -EIO;
272         }
273
274         priv->alloc_rxb_skb--;
275         dev_kfree_skb_any(cmd.meta.u.skb);
276
277         return rc;
278 }
279
280 /**
281  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
282  * @priv: eeprom and antenna fields are used to determine antenna flags
283  *
284  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
285  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
286  *
287  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
288  * IWL_ANTENNA_MAIN      - Force MAIN antenna
289  * IWL_ANTENNA_AUX       - Force AUX antenna
290  */
291 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
292 {
293         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
294
295         switch (iwl3945_mod_params.antenna) {
296         case IWL_ANTENNA_DIVERSITY:
297                 return 0;
298
299         case IWL_ANTENNA_MAIN:
300                 if (eeprom->antenna_switch_type)
301                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
302                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
303
304         case IWL_ANTENNA_AUX:
305                 if (eeprom->antenna_switch_type)
306                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
307                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
308         }
309
310         /* bad antenna selector value */
311         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
312                 iwl3945_mod_params.antenna);
313
314         return 0;               /* "diversity" is default if error */
315 }
316
317 /**
318  * iwl3945_commit_rxon - commit staging_rxon to hardware
319  *
320  * The RXON command in staging_rxon is committed to the hardware and
321  * the active_rxon structure is updated with the new data.  This
322  * function correctly transitions out of the RXON_ASSOC_MSK state if
323  * a HW tune is required based on the RXON structure changes.
324  */
325 static int iwl3945_commit_rxon(struct iwl_priv *priv)
326 {
327         /* cast away the const for active_rxon in this function */
328         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
329         struct iwl3945_rxon_cmd *staging_rxon = (void *)&priv->staging_rxon;
330         int rc = 0;
331         bool new_assoc =
332                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
333
334         if (!iwl_is_alive(priv))
335                 return -1;
336
337         /* always get timestamp with Rx frame */
338         staging_rxon->flags |= RXON_FLG_TSF2HOST_MSK;
339
340         /* select antenna */
341         staging_rxon->flags &=
342             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
343         staging_rxon->flags |= iwl3945_get_antenna_flags(priv);
344
345         rc = iwl_check_rxon_cmd(priv);
346         if (rc) {
347                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
348                 return -EINVAL;
349         }
350
351         /* If we don't need to send a full RXON, we can use
352          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
353          * and other flags for the current radio configuration. */
354         if (!iwl_full_rxon_required(priv)) {
355                 rc = iwl3945_send_rxon_assoc(priv);
356                 if (rc) {
357                         IWL_ERR(priv, "Error setting RXON_ASSOC "
358                                   "configuration (%d).\n", rc);
359                         return rc;
360                 }
361
362                 memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
363
364                 return 0;
365         }
366
367         /* If we are currently associated and the new config requires
368          * an RXON_ASSOC and the new config wants the associated mask enabled,
369          * we must clear the associated from the active configuration
370          * before we apply the new config */
371         if (iwl_is_associated(priv) && new_assoc) {
372                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
373                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
374
375                 /*
376                  * reserved4 and 5 could have been filled by the iwlcore code.
377                  * Let's clear them before pushing to the 3945.
378                  */
379                 active_rxon->reserved4 = 0;
380                 active_rxon->reserved5 = 0;
381                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
382                                       sizeof(struct iwl3945_rxon_cmd),
383                                       &priv->active_rxon);
384
385                 /* If the mask clearing failed then we set
386                  * active_rxon back to what it was previously */
387                 if (rc) {
388                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
389                         IWL_ERR(priv, "Error clearing ASSOC_MSK on current "
390                                   "configuration (%d).\n", rc);
391                         return rc;
392                 }
393         }
394
395         IWL_DEBUG_INFO(priv, "Sending RXON\n"
396                        "* with%s RXON_FILTER_ASSOC_MSK\n"
397                        "* channel = %d\n"
398                        "* bssid = %pM\n",
399                        (new_assoc ? "" : "out"),
400                        le16_to_cpu(staging_rxon->channel),
401                        staging_rxon->bssid_addr);
402
403         /*
404          * reserved4 and 5 could have been filled by the iwlcore code.
405          * Let's clear them before pushing to the 3945.
406          */
407         staging_rxon->reserved4 = 0;
408         staging_rxon->reserved5 = 0;
409
410         iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
411
412         /* Apply the new configuration */
413         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
414                               sizeof(struct iwl3945_rxon_cmd),
415                               staging_rxon);
416         if (rc) {
417                 IWL_ERR(priv, "Error setting new configuration (%d).\n", rc);
418                 return rc;
419         }
420
421         memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
422
423         iwl3945_clear_stations_table(priv);
424
425         /* If we issue a new RXON command which required a tune then we must
426          * send a new TXPOWER command or we won't be able to Tx any frames */
427         rc = priv->cfg->ops->lib->send_tx_power(priv);
428         if (rc) {
429                 IWL_ERR(priv, "Error setting Tx power (%d).\n", rc);
430                 return rc;
431         }
432
433         /* Add the broadcast address so we can send broadcast frames */
434         if (iwl3945_add_station(priv, iwl_bcast_addr, 0, 0) ==
435             IWL_INVALID_STATION) {
436                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
437                 return -EIO;
438         }
439
440         /* If we have set the ASSOC_MSK and we are in BSS mode then
441          * add the IWL_AP_ID to the station rate table */
442         if (iwl_is_associated(priv) &&
443             (priv->iw_mode == NL80211_IFTYPE_STATION))
444                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr,
445                                         1, 0)
446                     == IWL_INVALID_STATION) {
447                         IWL_ERR(priv, "Error adding AP address for transmit\n");
448                         return -EIO;
449                 }
450
451         /* Init the hardware's rate fallback order based on the band */
452         rc = iwl3945_init_hw_rate_table(priv);
453         if (rc) {
454                 IWL_ERR(priv, "Error setting HW rate table: %02X\n", rc);
455                 return -EIO;
456         }
457
458         return 0;
459 }
460
461 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
462                                    struct ieee80211_key_conf *keyconf,
463                                    u8 sta_id)
464 {
465         unsigned long flags;
466         __le16 key_flags = 0;
467         int ret;
468
469         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
470         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
471
472         if (sta_id == priv->hw_params.bcast_sta_id)
473                 key_flags |= STA_KEY_MULTICAST_MSK;
474
475         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
476         keyconf->hw_key_idx = keyconf->keyidx;
477         key_flags &= ~STA_KEY_FLG_INVALID;
478
479         spin_lock_irqsave(&priv->sta_lock, flags);
480         priv->stations_39[sta_id].keyinfo.alg = keyconf->alg;
481         priv->stations_39[sta_id].keyinfo.keylen = keyconf->keylen;
482         memcpy(priv->stations_39[sta_id].keyinfo.key, keyconf->key,
483                keyconf->keylen);
484
485         memcpy(priv->stations_39[sta_id].sta.key.key, keyconf->key,
486                keyconf->keylen);
487
488         if ((priv->stations_39[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
489                         == STA_KEY_FLG_NO_ENC)
490                 priv->stations_39[sta_id].sta.key.key_offset =
491                                  iwl_get_free_ucode_key_index(priv);
492         /* else, we are overriding an existing key => no need to allocated room
493         * in uCode. */
494
495         WARN(priv->stations_39[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
496                 "no space for a new key");
497
498         priv->stations_39[sta_id].sta.key.key_flags = key_flags;
499         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
500         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
501
502         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
503
504         ret = iwl_send_add_sta(priv,
505                 (struct iwl_addsta_cmd *)&priv->stations_39[sta_id].sta, CMD_ASYNC);
506
507         spin_unlock_irqrestore(&priv->sta_lock, flags);
508
509         return ret;
510 }
511
512 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
513                                   struct ieee80211_key_conf *keyconf,
514                                   u8 sta_id)
515 {
516         return -EOPNOTSUPP;
517 }
518
519 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
520                                   struct ieee80211_key_conf *keyconf,
521                                   u8 sta_id)
522 {
523         return -EOPNOTSUPP;
524 }
525
526 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
527 {
528         unsigned long flags;
529
530         spin_lock_irqsave(&priv->sta_lock, flags);
531         memset(&priv->stations_39[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
532         memset(&priv->stations_39[sta_id].sta.key, 0,
533                 sizeof(struct iwl4965_keyinfo));
534         priv->stations_39[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
535         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
536         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
537         spin_unlock_irqrestore(&priv->sta_lock, flags);
538
539         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
540         iwl_send_add_sta(priv,
541                 (struct iwl_addsta_cmd *)&priv->stations_39[sta_id].sta, 0);
542         return 0;
543 }
544
545 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
546                         struct ieee80211_key_conf *keyconf, u8 sta_id)
547 {
548         int ret = 0;
549
550         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
551
552         switch (keyconf->alg) {
553         case ALG_CCMP:
554                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
555                 break;
556         case ALG_TKIP:
557                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
558                 break;
559         case ALG_WEP:
560                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
561                 break;
562         default:
563                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
564                 ret = -EINVAL;
565         }
566
567         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
568                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
569                       sta_id, ret);
570
571         return ret;
572 }
573
574 static int iwl3945_remove_static_key(struct iwl_priv *priv)
575 {
576         int ret = -EOPNOTSUPP;
577
578         return ret;
579 }
580
581 static int iwl3945_set_static_key(struct iwl_priv *priv,
582                                 struct ieee80211_key_conf *key)
583 {
584         if (key->alg == ALG_WEP)
585                 return -EOPNOTSUPP;
586
587         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
588         return -EINVAL;
589 }
590
591 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
592 {
593         struct list_head *element;
594
595         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
596                        priv->frames_count);
597
598         while (!list_empty(&priv->free_frames)) {
599                 element = priv->free_frames.next;
600                 list_del(element);
601                 kfree(list_entry(element, struct iwl3945_frame, list));
602                 priv->frames_count--;
603         }
604
605         if (priv->frames_count) {
606                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
607                             priv->frames_count);
608                 priv->frames_count = 0;
609         }
610 }
611
612 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
613 {
614         struct iwl3945_frame *frame;
615         struct list_head *element;
616         if (list_empty(&priv->free_frames)) {
617                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
618                 if (!frame) {
619                         IWL_ERR(priv, "Could not allocate frame!\n");
620                         return NULL;
621                 }
622
623                 priv->frames_count++;
624                 return frame;
625         }
626
627         element = priv->free_frames.next;
628         list_del(element);
629         return list_entry(element, struct iwl3945_frame, list);
630 }
631
632 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
633 {
634         memset(frame, 0, sizeof(*frame));
635         list_add(&frame->list, &priv->free_frames);
636 }
637
638 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
639                                 struct ieee80211_hdr *hdr,
640                                 int left)
641 {
642
643         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
644             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
645              (priv->iw_mode != NL80211_IFTYPE_AP)))
646                 return 0;
647
648         if (priv->ibss_beacon->len > left)
649                 return 0;
650
651         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
652
653         return priv->ibss_beacon->len;
654 }
655
656 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
657 {
658         struct iwl3945_frame *frame;
659         unsigned int frame_size;
660         int rc;
661         u8 rate;
662
663         frame = iwl3945_get_free_frame(priv);
664
665         if (!frame) {
666                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
667                           "command.\n");
668                 return -ENOMEM;
669         }
670
671         rate = iwl_rate_get_lowest_plcp(priv);
672
673         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
674
675         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
676                               &frame->u.cmd[0]);
677
678         iwl3945_free_frame(priv, frame);
679
680         return rc;
681 }
682
683 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
684 {
685         if (priv->shared_virt)
686                 pci_free_consistent(priv->pci_dev,
687                                     sizeof(struct iwl3945_shared),
688                                     priv->shared_virt,
689                                     priv->shared_phys);
690 }
691
692 #define MAX_UCODE_BEACON_INTERVAL       1024
693 #define INTEL_CONN_LISTEN_INTERVAL      cpu_to_le16(0xA)
694
695 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
696 {
697         u16 new_val = 0;
698         u16 beacon_factor = 0;
699
700         beacon_factor =
701             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
702                 / MAX_UCODE_BEACON_INTERVAL;
703         new_val = beacon_val / beacon_factor;
704
705         return cpu_to_le16(new_val);
706 }
707
708 static void iwl3945_setup_rxon_timing(struct iwl_priv *priv)
709 {
710         u64 interval_tm_unit;
711         u64 tsf, result;
712         unsigned long flags;
713         struct ieee80211_conf *conf = NULL;
714         u16 beacon_int = 0;
715
716         conf = ieee80211_get_hw_conf(priv->hw);
717
718         spin_lock_irqsave(&priv->lock, flags);
719         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
720         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
721
722         tsf = priv->timestamp;
723
724         beacon_int = priv->beacon_int;
725         spin_unlock_irqrestore(&priv->lock, flags);
726
727         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
728                 if (beacon_int == 0) {
729                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
730                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
731                 } else {
732                         priv->rxon_timing.beacon_interval =
733                                 cpu_to_le16(beacon_int);
734                         priv->rxon_timing.beacon_interval =
735                             iwl3945_adjust_beacon_interval(
736                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
737                 }
738
739                 priv->rxon_timing.atim_window = 0;
740         } else {
741                 priv->rxon_timing.beacon_interval =
742                         iwl3945_adjust_beacon_interval(conf->beacon_int);
743                 /* TODO: we need to get atim_window from upper stack
744                  * for now we set to 0 */
745                 priv->rxon_timing.atim_window = 0;
746         }
747
748         interval_tm_unit =
749                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
750         result = do_div(tsf, interval_tm_unit);
751         priv->rxon_timing.beacon_init_val =
752             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
753
754         IWL_DEBUG_ASSOC(priv,
755                 "beacon interval %d beacon timer %d beacon tim %d\n",
756                 le16_to_cpu(priv->rxon_timing.beacon_interval),
757                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
758                 le16_to_cpu(priv->rxon_timing.atim_window));
759 }
760
761 static int iwl3945_set_mode(struct iwl_priv *priv, int mode)
762 {
763         if (mode == NL80211_IFTYPE_ADHOC) {
764                 const struct iwl_channel_info *ch_info;
765
766                 ch_info = iwl_get_channel_info(priv,
767                         priv->band,
768                         le16_to_cpu(priv->staging_rxon.channel));
769
770                 if (!ch_info || !is_channel_ibss(ch_info)) {
771                         IWL_ERR(priv, "channel %d not IBSS channel\n",
772                                   le16_to_cpu(priv->staging_rxon.channel));
773                         return -EINVAL;
774                 }
775         }
776
777         iwl_connection_init_rx_config(priv, mode);
778
779         iwl3945_clear_stations_table(priv);
780
781         /* don't commit rxon if rf-kill is on*/
782         if (!iwl_is_ready_rf(priv))
783                 return -EAGAIN;
784
785         cancel_delayed_work(&priv->scan_check);
786         if (iwl_scan_cancel_timeout(priv, 100)) {
787                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
788                 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
789                 return -EAGAIN;
790         }
791
792         iwl3945_commit_rxon(priv);
793
794         return 0;
795 }
796
797 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
798                                       struct ieee80211_tx_info *info,
799                                       struct iwl_cmd *cmd,
800                                       struct sk_buff *skb_frag,
801                                       int sta_id)
802 {
803         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
804         struct iwl3945_hw_key *keyinfo =
805             &priv->stations_39[sta_id].keyinfo;
806
807         switch (keyinfo->alg) {
808         case ALG_CCMP:
809                 tx->sec_ctl = TX_CMD_SEC_CCM;
810                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
811                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
812                 break;
813
814         case ALG_TKIP:
815                 break;
816
817         case ALG_WEP:
818                 tx->sec_ctl = TX_CMD_SEC_WEP |
819                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
820
821                 if (keyinfo->keylen == 13)
822                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
823
824                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
825
826                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
827                              "with key %d\n", info->control.hw_key->hw_key_idx);
828                 break;
829
830         default:
831                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
832                 break;
833         }
834 }
835
836 /*
837  * handle build REPLY_TX command notification.
838  */
839 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
840                                   struct iwl_cmd *cmd,
841                                   struct ieee80211_tx_info *info,
842                                   struct ieee80211_hdr *hdr, u8 std_id)
843 {
844         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
845         __le32 tx_flags = tx->tx_flags;
846         __le16 fc = hdr->frame_control;
847         u8 rc_flags = info->control.rates[0].flags;
848
849         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
850         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
851                 tx_flags |= TX_CMD_FLG_ACK_MSK;
852                 if (ieee80211_is_mgmt(fc))
853                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
854                 if (ieee80211_is_probe_resp(fc) &&
855                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
856                         tx_flags |= TX_CMD_FLG_TSF_MSK;
857         } else {
858                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
859                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
860         }
861
862         tx->sta_id = std_id;
863         if (ieee80211_has_morefrags(fc))
864                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
865
866         if (ieee80211_is_data_qos(fc)) {
867                 u8 *qc = ieee80211_get_qos_ctl(hdr);
868                 tx->tid_tspec = qc[0] & 0xf;
869                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
870         } else {
871                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
872         }
873
874         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
875                 tx_flags |= TX_CMD_FLG_RTS_MSK;
876                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
877         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
878                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
879                 tx_flags |= TX_CMD_FLG_CTS_MSK;
880         }
881
882         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
883                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
884
885         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
886         if (ieee80211_is_mgmt(fc)) {
887                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
888                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
889                 else
890                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
891         } else {
892                 tx->timeout.pm_frame_timeout = 0;
893 #ifdef CONFIG_IWLWIFI_LEDS
894                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
895 #endif
896         }
897
898         tx->driver_txop = 0;
899         tx->tx_flags = tx_flags;
900         tx->next_frame_len = 0;
901 }
902
903 /**
904  * iwl3945_get_sta_id - Find station's index within station table
905  */
906 static int iwl3945_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
907 {
908         int sta_id;
909         u16 fc = le16_to_cpu(hdr->frame_control);
910
911         /* If this frame is broadcast or management, use broadcast station id */
912         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
913             is_multicast_ether_addr(hdr->addr1))
914                 return priv->hw_params.bcast_sta_id;
915
916         switch (priv->iw_mode) {
917
918         /* If we are a client station in a BSS network, use the special
919          * AP station entry (that's the only station we communicate with) */
920         case NL80211_IFTYPE_STATION:
921                 return IWL_AP_ID;
922
923         /* If we are an AP, then find the station, or use BCAST */
924         case NL80211_IFTYPE_AP:
925                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
926                 if (sta_id != IWL_INVALID_STATION)
927                         return sta_id;
928                 return priv->hw_params.bcast_sta_id;
929
930         /* If this frame is going out to an IBSS network, find the station,
931          * or create a new station table entry */
932         case NL80211_IFTYPE_ADHOC: {
933                 /* Create new station table entry */
934                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
935                 if (sta_id != IWL_INVALID_STATION)
936                         return sta_id;
937
938                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
939
940                 if (sta_id != IWL_INVALID_STATION)
941                         return sta_id;
942
943                 IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
944                                "Defaulting to broadcast...\n",
945                                hdr->addr1);
946                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
947                 return priv->hw_params.bcast_sta_id;
948         }
949         /* If we are in monitor mode, use BCAST. This is required for
950          * packet injection. */
951         case NL80211_IFTYPE_MONITOR:
952                 return priv->hw_params.bcast_sta_id;
953
954         default:
955                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
956                         priv->iw_mode);
957                 return priv->hw_params.bcast_sta_id;
958         }
959 }
960
961 /*
962  * start REPLY_TX command process
963  */
964 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
965 {
966         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
967         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
968         struct iwl3945_tx_cmd *tx;
969         struct iwl_tx_queue *txq = NULL;
970         struct iwl_queue *q = NULL;
971         struct iwl_cmd *out_cmd = NULL;
972         dma_addr_t phys_addr;
973         dma_addr_t txcmd_phys;
974         int txq_id = skb_get_queue_mapping(skb);
975         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
976         u8 id;
977         u8 unicast;
978         u8 sta_id;
979         u8 tid = 0;
980         u16 seq_number = 0;
981         __le16 fc;
982         u8 wait_write_ptr = 0;
983         u8 *qc = NULL;
984         unsigned long flags;
985         int rc;
986
987         spin_lock_irqsave(&priv->lock, flags);
988         if (iwl_is_rfkill(priv)) {
989                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
990                 goto drop_unlock;
991         }
992
993         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
994                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
995                 goto drop_unlock;
996         }
997
998         unicast = !is_multicast_ether_addr(hdr->addr1);
999         id = 0;
1000
1001         fc = hdr->frame_control;
1002
1003 #ifdef CONFIG_IWLWIFI_DEBUG
1004         if (ieee80211_is_auth(fc))
1005                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
1006         else if (ieee80211_is_assoc_req(fc))
1007                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
1008         else if (ieee80211_is_reassoc_req(fc))
1009                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
1010 #endif
1011
1012         /* drop all data frame if we are not associated */
1013         if (ieee80211_is_data(fc) &&
1014             (priv->iw_mode != NL80211_IFTYPE_MONITOR) && /* packet injection */
1015             (!iwl_is_associated(priv) ||
1016              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
1017                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
1018                 goto drop_unlock;
1019         }
1020
1021         spin_unlock_irqrestore(&priv->lock, flags);
1022
1023         hdr_len = ieee80211_hdrlen(fc);
1024
1025         /* Find (or create) index into station table for destination station */
1026         sta_id = iwl3945_get_sta_id(priv, hdr);
1027         if (sta_id == IWL_INVALID_STATION) {
1028                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
1029                                hdr->addr1);
1030                 goto drop;
1031         }
1032
1033         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
1034
1035         if (ieee80211_is_data_qos(fc)) {
1036                 qc = ieee80211_get_qos_ctl(hdr);
1037                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
1038                 seq_number = priv->stations_39[sta_id].tid[tid].seq_number &
1039                                 IEEE80211_SCTL_SEQ;
1040                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
1041                         (hdr->seq_ctrl &
1042                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
1043                 seq_number += 0x10;
1044         }
1045
1046         /* Descriptor for chosen Tx queue */
1047         txq = &priv->txq[txq_id];
1048         q = &txq->q;
1049
1050         spin_lock_irqsave(&priv->lock, flags);
1051
1052         idx = get_cmd_index(q, q->write_ptr, 0);
1053
1054         /* Set up driver data for this TFD */
1055         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
1056         txq->txb[q->write_ptr].skb[0] = skb;
1057
1058         /* Init first empty entry in queue's array of Tx/cmd buffers */
1059         out_cmd = txq->cmd[idx];
1060         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
1061         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
1062         memset(tx, 0, sizeof(*tx));
1063
1064         /*
1065          * Set up the Tx-command (not MAC!) header.
1066          * Store the chosen Tx queue and TFD index within the sequence field;
1067          * after Tx, uCode's Tx response will return this value so driver can
1068          * locate the frame within the tx queue and do post-tx processing.
1069          */
1070         out_cmd->hdr.cmd = REPLY_TX;
1071         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
1072                                 INDEX_TO_SEQ(q->write_ptr)));
1073
1074         /* Copy MAC header from skb into command buffer */
1075         memcpy(tx->hdr, hdr, hdr_len);
1076
1077
1078         if (info->control.hw_key)
1079                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
1080
1081         /* TODO need this for burst mode later on */
1082         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
1083
1084         /* set is_hcca to 0; it probably will never be implemented */
1085         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
1086
1087         /* Total # bytes to be transmitted */
1088         len = (u16)skb->len;
1089         tx->len = cpu_to_le16(len);
1090
1091
1092         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
1093         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
1094
1095         if (!ieee80211_has_morefrags(hdr->frame_control)) {
1096                 txq->need_update = 1;
1097                 if (qc)
1098                         priv->stations_39[sta_id].tid[tid].seq_number = seq_number;
1099         } else {
1100                 wait_write_ptr = 1;
1101                 txq->need_update = 0;
1102         }
1103
1104         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
1105                      le16_to_cpu(out_cmd->hdr.sequence));
1106         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
1107         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
1108         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
1109                            ieee80211_hdrlen(fc));
1110
1111         /*
1112          * Use the first empty entry in this queue's command buffer array
1113          * to contain the Tx command and MAC header concatenated together
1114          * (payload data will be in another buffer).
1115          * Size of this varies, due to varying MAC header length.
1116          * If end is not dword aligned, we'll have 2 extra bytes at the end
1117          * of the MAC header (device reads on dword boundaries).
1118          * We'll tell device about this padding later.
1119          */
1120         len = sizeof(struct iwl3945_tx_cmd) +
1121                         sizeof(struct iwl_cmd_header) + hdr_len;
1122
1123         len_org = len;
1124         len = (len + 3) & ~3;
1125
1126         if (len_org != len)
1127                 len_org = 1;
1128         else
1129                 len_org = 0;
1130
1131         /* Physical address of this Tx command's header (not MAC header!),
1132          * within command buffer array. */
1133         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
1134                                     len, PCI_DMA_TODEVICE);
1135         /* we do not map meta data ... so we can safely access address to
1136          * provide to unmap command*/
1137         pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys);
1138         pci_unmap_len_set(&out_cmd->meta, len, len);
1139
1140         /* Add buffer containing Tx command and MAC(!) header to TFD's
1141          * first entry */
1142         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
1143                                                    txcmd_phys, len, 1, 0);
1144
1145
1146         /* Set up TFD's 2nd entry to point directly to remainder of skb,
1147          * if any (802.11 null frames have no payload). */
1148         len = skb->len - hdr_len;
1149         if (len) {
1150                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
1151                                            len, PCI_DMA_TODEVICE);
1152                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
1153                                                            phys_addr, len,
1154                                                            0, U32_PAD(len));
1155         }
1156
1157
1158         /* Tell device the write index *just past* this latest filled TFD */
1159         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
1160         rc = iwl_txq_update_write_ptr(priv, txq);
1161         spin_unlock_irqrestore(&priv->lock, flags);
1162
1163         if (rc)
1164                 return rc;
1165
1166         if ((iwl_queue_space(q) < q->high_mark)
1167             && priv->mac80211_registered) {
1168                 if (wait_write_ptr) {
1169                         spin_lock_irqsave(&priv->lock, flags);
1170                         txq->need_update = 1;
1171                         iwl_txq_update_write_ptr(priv, txq);
1172                         spin_unlock_irqrestore(&priv->lock, flags);
1173                 }
1174
1175                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
1176         }
1177
1178         return 0;
1179
1180 drop_unlock:
1181         spin_unlock_irqrestore(&priv->lock, flags);
1182 drop:
1183         return -1;
1184 }
1185
1186 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
1187
1188 #include "iwl-spectrum.h"
1189
1190 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
1191 #define BEACON_TIME_MASK_HIGH   0xFF000000
1192 #define TIME_UNIT               1024
1193
1194 /*
1195  * extended beacon time format
1196  * time in usec will be changed into a 32-bit value in 8:24 format
1197  * the high 1 byte is the beacon counts
1198  * the lower 3 bytes is the time in usec within one beacon interval
1199  */
1200
1201 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
1202 {
1203         u32 quot;
1204         u32 rem;
1205         u32 interval = beacon_interval * 1024;
1206
1207         if (!interval || !usec)
1208                 return 0;
1209
1210         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
1211         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
1212
1213         return (quot << 24) + rem;
1214 }
1215
1216 /* base is usually what we get from ucode with each received frame,
1217  * the same as HW timer counter counting down
1218  */
1219
1220 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
1221 {
1222         u32 base_low = base & BEACON_TIME_MASK_LOW;
1223         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
1224         u32 interval = beacon_interval * TIME_UNIT;
1225         u32 res = (base & BEACON_TIME_MASK_HIGH) +
1226             (addon & BEACON_TIME_MASK_HIGH);
1227
1228         if (base_low > addon_low)
1229                 res += base_low - addon_low;
1230         else if (base_low < addon_low) {
1231                 res += interval + base_low - addon_low;
1232                 res += (1 << 24);
1233         } else
1234                 res += (1 << 24);
1235
1236         return cpu_to_le32(res);
1237 }
1238
1239 static int iwl3945_get_measurement(struct iwl_priv *priv,
1240                                struct ieee80211_measurement_params *params,
1241                                u8 type)
1242 {
1243         struct iwl_spectrum_cmd spectrum;
1244         struct iwl_rx_packet *res;
1245         struct iwl_host_cmd cmd = {
1246                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
1247                 .data = (void *)&spectrum,
1248                 .meta.flags = CMD_WANT_SKB,
1249         };
1250         u32 add_time = le64_to_cpu(params->start_time);
1251         int rc;
1252         int spectrum_resp_status;
1253         int duration = le16_to_cpu(params->duration);
1254
1255         if (iwl_is_associated(priv))
1256                 add_time =
1257                     iwl3945_usecs_to_beacons(
1258                         le64_to_cpu(params->start_time) - priv->last_tsf,
1259                         le16_to_cpu(priv->rxon_timing.beacon_interval));
1260
1261         memset(&spectrum, 0, sizeof(spectrum));
1262
1263         spectrum.channel_count = cpu_to_le16(1);
1264         spectrum.flags =
1265             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
1266         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
1267         cmd.len = sizeof(spectrum);
1268         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
1269
1270         if (iwl_is_associated(priv))
1271                 spectrum.start_time =
1272                     iwl3945_add_beacon_time(priv->last_beacon_time,
1273                                 add_time,
1274                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1275         else
1276                 spectrum.start_time = 0;
1277
1278         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
1279         spectrum.channels[0].channel = params->channel;
1280         spectrum.channels[0].type = type;
1281         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
1282                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
1283                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
1284
1285         rc = iwl_send_cmd_sync(priv, &cmd);
1286         if (rc)
1287                 return rc;
1288
1289         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1290         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1291                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
1292                 rc = -EIO;
1293         }
1294
1295         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
1296         switch (spectrum_resp_status) {
1297         case 0:         /* Command will be handled */
1298                 if (res->u.spectrum.id != 0xff) {
1299                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
1300                                                 res->u.spectrum.id);
1301                         priv->measurement_status &= ~MEASUREMENT_READY;
1302                 }
1303                 priv->measurement_status |= MEASUREMENT_ACTIVE;
1304                 rc = 0;
1305                 break;
1306
1307         case 1:         /* Command will not be handled */
1308                 rc = -EAGAIN;
1309                 break;
1310         }
1311
1312         dev_kfree_skb_any(cmd.meta.u.skb);
1313
1314         return rc;
1315 }
1316 #endif
1317
1318 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
1319                                struct iwl_rx_mem_buffer *rxb)
1320 {
1321         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1322         struct iwl_alive_resp *palive;
1323         struct delayed_work *pwork;
1324
1325         palive = &pkt->u.alive_frame;
1326
1327         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
1328                        "0x%01X 0x%01X\n",
1329                        palive->is_valid, palive->ver_type,
1330                        palive->ver_subtype);
1331
1332         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
1333                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
1334                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
1335                        sizeof(struct iwl_alive_resp));
1336                 pwork = &priv->init_alive_start;
1337         } else {
1338                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1339                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
1340                        sizeof(struct iwl_alive_resp));
1341                 pwork = &priv->alive_start;
1342                 iwl3945_disable_events(priv);
1343         }
1344
1345         /* We delay the ALIVE response by 5ms to
1346          * give the HW RF Kill time to activate... */
1347         if (palive->is_valid == UCODE_VALID_OK)
1348                 queue_delayed_work(priv->workqueue, pwork,
1349                                    msecs_to_jiffies(5));
1350         else
1351                 IWL_WARN(priv, "uCode did not respond OK.\n");
1352 }
1353
1354 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
1355                                  struct iwl_rx_mem_buffer *rxb)
1356 {
1357 #ifdef CONFIG_IWLWIFI_DEBUG
1358         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1359 #endif
1360
1361         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
1362         return;
1363 }
1364
1365 static void iwl3945_bg_beacon_update(struct work_struct *work)
1366 {
1367         struct iwl_priv *priv =
1368                 container_of(work, struct iwl_priv, beacon_update);
1369         struct sk_buff *beacon;
1370
1371         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
1372         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
1373
1374         if (!beacon) {
1375                 IWL_ERR(priv, "update beacon failed\n");
1376                 return;
1377         }
1378
1379         mutex_lock(&priv->mutex);
1380         /* new beacon skb is allocated every time; dispose previous.*/
1381         if (priv->ibss_beacon)
1382                 dev_kfree_skb(priv->ibss_beacon);
1383
1384         priv->ibss_beacon = beacon;
1385         mutex_unlock(&priv->mutex);
1386
1387         iwl3945_send_beacon_cmd(priv);
1388 }
1389
1390 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
1391                                 struct iwl_rx_mem_buffer *rxb)
1392 {
1393 #ifdef CONFIG_IWLWIFI_DEBUG
1394         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1395         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
1396         u8 rate = beacon->beacon_notify_hdr.rate;
1397
1398         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
1399                 "tsf %d %d rate %d\n",
1400                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
1401                 beacon->beacon_notify_hdr.failure_frame,
1402                 le32_to_cpu(beacon->ibss_mgr_status),
1403                 le32_to_cpu(beacon->high_tsf),
1404                 le32_to_cpu(beacon->low_tsf), rate);
1405 #endif
1406
1407         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
1408             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
1409                 queue_work(priv->workqueue, &priv->beacon_update);
1410 }
1411
1412 /* Handle notification from uCode that card's power state is changing
1413  * due to software, hardware, or critical temperature RFKILL */
1414 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
1415                                     struct iwl_rx_mem_buffer *rxb)
1416 {
1417         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1418         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
1419         unsigned long status = priv->status;
1420
1421         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
1422                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1423                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1424
1425         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1426                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1427
1428         if (flags & HW_CARD_DISABLED)
1429                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1430         else
1431                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1432
1433
1434         if (flags & SW_CARD_DISABLED)
1435                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1436         else
1437                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1438
1439         iwl_scan_cancel(priv);
1440
1441         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1442              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1443             (test_bit(STATUS_RF_KILL_SW, &status) !=
1444              test_bit(STATUS_RF_KILL_SW, &priv->status)))
1445                 queue_work(priv->workqueue, &priv->rf_kill);
1446         else
1447                 wake_up_interruptible(&priv->wait_command_queue);
1448 }
1449
1450 /**
1451  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
1452  *
1453  * Setup the RX handlers for each of the reply types sent from the uCode
1454  * to the host.
1455  *
1456  * This function chains into the hardware specific files for them to setup
1457  * any hardware specific handlers as well.
1458  */
1459 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
1460 {
1461         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
1462         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
1463         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
1464         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1465         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1466         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1467             iwl_rx_pm_debug_statistics_notif;
1468         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
1469
1470         /*
1471          * The same handler is used for both the REPLY to a discrete
1472          * statistics request from the host as well as for the periodic
1473          * statistics notifications (after received beacons) from the uCode.
1474          */
1475         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
1476         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
1477
1478         iwl_setup_spectrum_handlers(priv);
1479         iwl_setup_rx_scan_handlers(priv);
1480         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
1481
1482         /* Set up hardware specific Rx handlers */
1483         iwl3945_hw_rx_handler_setup(priv);
1484 }
1485
1486 /************************** RX-FUNCTIONS ****************************/
1487 /*
1488  * Rx theory of operation
1489  *
1490  * The host allocates 32 DMA target addresses and passes the host address
1491  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1492  * 0 to 31
1493  *
1494  * Rx Queue Indexes
1495  * The host/firmware share two index registers for managing the Rx buffers.
1496  *
1497  * The READ index maps to the first position that the firmware may be writing
1498  * to -- the driver can read up to (but not including) this position and get
1499  * good data.
1500  * The READ index is managed by the firmware once the card is enabled.
1501  *
1502  * The WRITE index maps to the last position the driver has read from -- the
1503  * position preceding WRITE is the last slot the firmware can place a packet.
1504  *
1505  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1506  * WRITE = READ.
1507  *
1508  * During initialization, the host sets up the READ queue position to the first
1509  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1510  *
1511  * When the firmware places a packet in a buffer, it will advance the READ index
1512  * and fire the RX interrupt.  The driver can then query the READ index and
1513  * process as many packets as possible, moving the WRITE index forward as it
1514  * resets the Rx queue buffers with new memory.
1515  *
1516  * The management in the driver is as follows:
1517  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1518  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1519  *   to replenish the iwl->rxq->rx_free.
1520  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1521  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1522  *   'processed' and 'read' driver indexes as well)
1523  * + A received packet is processed and handed to the kernel network stack,
1524  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1525  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1526  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1527  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1528  *   were enough free buffers and RX_STALLED is set it is cleared.
1529  *
1530  *
1531  * Driver sequence:
1532  *
1533  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1534  *                            iwl3945_rx_queue_restock
1535  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1536  *                            queue, updates firmware pointers, and updates
1537  *                            the WRITE index.  If insufficient rx_free buffers
1538  *                            are available, schedules iwl3945_rx_replenish
1539  *
1540  * -- enable interrupts --
1541  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1542  *                            READ INDEX, detaching the SKB from the pool.
1543  *                            Moves the packet buffer from queue to rx_used.
1544  *                            Calls iwl3945_rx_queue_restock to refill any empty
1545  *                            slots.
1546  * ...
1547  *
1548  */
1549
1550 /**
1551  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1552  */
1553 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1554                                           dma_addr_t dma_addr)
1555 {
1556         return cpu_to_le32((u32)dma_addr);
1557 }
1558
1559 /**
1560  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1561  *
1562  * If there are slots in the RX queue that need to be restocked,
1563  * and we have free pre-allocated buffers, fill the ranks as much
1564  * as we can, pulling from rx_free.
1565  *
1566  * This moves the 'write' index forward to catch up with 'processed', and
1567  * also updates the memory address in the firmware to reference the new
1568  * target buffer.
1569  */
1570 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1571 {
1572         struct iwl_rx_queue *rxq = &priv->rxq;
1573         struct list_head *element;
1574         struct iwl_rx_mem_buffer *rxb;
1575         unsigned long flags;
1576         int write, rc;
1577
1578         spin_lock_irqsave(&rxq->lock, flags);
1579         write = rxq->write & ~0x7;
1580         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1581                 /* Get next free Rx buffer, remove from free list */
1582                 element = rxq->rx_free.next;
1583                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1584                 list_del(element);
1585
1586                 /* Point to Rx buffer via next RBD in circular buffer */
1587                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1588                 rxq->queue[rxq->write] = rxb;
1589                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1590                 rxq->free_count--;
1591         }
1592         spin_unlock_irqrestore(&rxq->lock, flags);
1593         /* If the pre-allocated buffer pool is dropping low, schedule to
1594          * refill it */
1595         if (rxq->free_count <= RX_LOW_WATERMARK)
1596                 queue_work(priv->workqueue, &priv->rx_replenish);
1597
1598
1599         /* If we've added more space for the firmware to place data, tell it.
1600          * Increment device's write pointer in multiples of 8. */
1601         if ((write != (rxq->write & ~0x7))
1602             || (abs(rxq->write - rxq->read) > 7)) {
1603                 spin_lock_irqsave(&rxq->lock, flags);
1604                 rxq->need_update = 1;
1605                 spin_unlock_irqrestore(&rxq->lock, flags);
1606                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1607                 if (rc)
1608                         return rc;
1609         }
1610
1611         return 0;
1612 }
1613
1614 /**
1615  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1616  *
1617  * When moving to rx_free an SKB is allocated for the slot.
1618  *
1619  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1620  * This is called as a scheduled work item (except for during initialization)
1621  */
1622 static void iwl3945_rx_allocate(struct iwl_priv *priv)
1623 {
1624         struct iwl_rx_queue *rxq = &priv->rxq;
1625         struct list_head *element;
1626         struct iwl_rx_mem_buffer *rxb;
1627         unsigned long flags;
1628         spin_lock_irqsave(&rxq->lock, flags);
1629         while (!list_empty(&rxq->rx_used)) {
1630                 element = rxq->rx_used.next;
1631                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1632
1633                 /* Alloc a new receive buffer */
1634                 rxb->skb =
1635                     alloc_skb(priv->hw_params.rx_buf_size,
1636                                 __GFP_NOWARN | GFP_ATOMIC);
1637                 if (!rxb->skb) {
1638                         if (net_ratelimit())
1639                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1640                         /* We don't reschedule replenish work here -- we will
1641                          * call the restock method and if it still needs
1642                          * more buffers it will schedule replenish */
1643                         break;
1644                 }
1645
1646                 /* If radiotap head is required, reserve some headroom here.
1647                  * The physical head count is a variable rx_stats->phy_count.
1648                  * We reserve 4 bytes here. Plus these extra bytes, the
1649                  * headroom of the physical head should be enough for the
1650                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1651                  */
1652                 skb_reserve(rxb->skb, 4);
1653
1654                 priv->alloc_rxb_skb++;
1655                 list_del(element);
1656
1657                 /* Get physical address of RB/SKB */
1658                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1659                                                 rxb->skb->data,
1660                                                 priv->hw_params.rx_buf_size,
1661                                                 PCI_DMA_FROMDEVICE);
1662                 list_add_tail(&rxb->list, &rxq->rx_free);
1663                 rxq->free_count++;
1664         }
1665         spin_unlock_irqrestore(&rxq->lock, flags);
1666 }
1667
1668 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1669 {
1670         unsigned long flags;
1671         int i;
1672         spin_lock_irqsave(&rxq->lock, flags);
1673         INIT_LIST_HEAD(&rxq->rx_free);
1674         INIT_LIST_HEAD(&rxq->rx_used);
1675         /* Fill the rx_used queue with _all_ of the Rx buffers */
1676         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1677                 /* In the reset function, these buffers may have been allocated
1678                  * to an SKB, so we need to unmap and free potential storage */
1679                 if (rxq->pool[i].skb != NULL) {
1680                         pci_unmap_single(priv->pci_dev,
1681                                          rxq->pool[i].real_dma_addr,
1682                                          priv->hw_params.rx_buf_size,
1683                                          PCI_DMA_FROMDEVICE);
1684                         priv->alloc_rxb_skb--;
1685                         dev_kfree_skb(rxq->pool[i].skb);
1686                         rxq->pool[i].skb = NULL;
1687                 }
1688                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1689         }
1690
1691         /* Set us so that we have processed and used all buffers, but have
1692          * not restocked the Rx queue with fresh buffers */
1693         rxq->read = rxq->write = 0;
1694         rxq->free_count = 0;
1695         spin_unlock_irqrestore(&rxq->lock, flags);
1696 }
1697 EXPORT_SYMBOL(iwl3945_rx_queue_reset);
1698
1699 /*
1700  * this should be called while priv->lock is locked
1701  */
1702 static void __iwl3945_rx_replenish(void *data)
1703 {
1704         struct iwl_priv *priv = data;
1705
1706         iwl3945_rx_allocate(priv);
1707         iwl3945_rx_queue_restock(priv);
1708 }
1709
1710
1711 void iwl3945_rx_replenish(void *data)
1712 {
1713         struct iwl_priv *priv = data;
1714         unsigned long flags;
1715
1716         iwl3945_rx_allocate(priv);
1717
1718         spin_lock_irqsave(&priv->lock, flags);
1719         iwl3945_rx_queue_restock(priv);
1720         spin_unlock_irqrestore(&priv->lock, flags);
1721 }
1722
1723 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1724  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1725  * This free routine walks the list of POOL entries and if SKB is set to
1726  * non NULL it is unmapped and freed
1727  */
1728 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1729 {
1730         int i;
1731         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1732                 if (rxq->pool[i].skb != NULL) {
1733                         pci_unmap_single(priv->pci_dev,
1734                                          rxq->pool[i].real_dma_addr,
1735                                          priv->hw_params.rx_buf_size,
1736                                          PCI_DMA_FROMDEVICE);
1737                         dev_kfree_skb(rxq->pool[i].skb);
1738                 }
1739         }
1740
1741         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1742                             rxq->dma_addr);
1743         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1744                             rxq->rb_stts, rxq->rb_stts_dma);
1745         rxq->bd = NULL;
1746         rxq->rb_stts  = NULL;
1747 }
1748 EXPORT_SYMBOL(iwl3945_rx_queue_free);
1749
1750
1751 /* Convert linear signal-to-noise ratio into dB */
1752 static u8 ratio2dB[100] = {
1753 /*       0   1   2   3   4   5   6   7   8   9 */
1754          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1755         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1756         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1757         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1758         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1759         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1760         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1761         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1762         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1763         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1764 };
1765
1766 /* Calculates a relative dB value from a ratio of linear
1767  *   (i.e. not dB) signal levels.
1768  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1769 int iwl3945_calc_db_from_ratio(int sig_ratio)
1770 {
1771         /* 1000:1 or higher just report as 60 dB */
1772         if (sig_ratio >= 1000)
1773                 return 60;
1774
1775         /* 100:1 or higher, divide by 10 and use table,
1776          *   add 20 dB to make up for divide by 10 */
1777         if (sig_ratio >= 100)
1778                 return 20 + (int)ratio2dB[sig_ratio/10];
1779
1780         /* We shouldn't see this */
1781         if (sig_ratio < 1)
1782                 return 0;
1783
1784         /* Use table for ratios 1:1 - 99:1 */
1785         return (int)ratio2dB[sig_ratio];
1786 }
1787
1788 #define PERFECT_RSSI (-20) /* dBm */
1789 #define WORST_RSSI (-95)   /* dBm */
1790 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1791
1792 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1793  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1794  *   about formulas used below. */
1795 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1796 {
1797         int sig_qual;
1798         int degradation = PERFECT_RSSI - rssi_dbm;
1799
1800         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1801          * as indicator; formula is (signal dbm - noise dbm).
1802          * SNR at or above 40 is a great signal (100%).
1803          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1804          * Weakest usable signal is usually 10 - 15 dB SNR. */
1805         if (noise_dbm) {
1806                 if (rssi_dbm - noise_dbm >= 40)
1807                         return 100;
1808                 else if (rssi_dbm < noise_dbm)
1809                         return 0;
1810                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1811
1812         /* Else use just the signal level.
1813          * This formula is a least squares fit of data points collected and
1814          *   compared with a reference system that had a percentage (%) display
1815          *   for signal quality. */
1816         } else
1817                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1818                             (15 * RSSI_RANGE + 62 * degradation)) /
1819                            (RSSI_RANGE * RSSI_RANGE);
1820
1821         if (sig_qual > 100)
1822                 sig_qual = 100;
1823         else if (sig_qual < 1)
1824                 sig_qual = 0;
1825
1826         return sig_qual;
1827 }
1828
1829 /**
1830  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1831  *
1832  * Uses the priv->rx_handlers callback function array to invoke
1833  * the appropriate handlers, including command responses,
1834  * frame-received notifications, and other notifications.
1835  */
1836 static void iwl3945_rx_handle(struct iwl_priv *priv)
1837 {
1838         struct iwl_rx_mem_buffer *rxb;
1839         struct iwl_rx_packet *pkt;
1840         struct iwl_rx_queue *rxq = &priv->rxq;
1841         u32 r, i;
1842         int reclaim;
1843         unsigned long flags;
1844         u8 fill_rx = 0;
1845         u32 count = 8;
1846
1847         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1848          * buffer that the driver may process (last buffer filled by ucode). */
1849         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1850         i = rxq->read;
1851
1852         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1853                 fill_rx = 1;
1854         /* Rx interrupt, but nothing sent from uCode */
1855         if (i == r)
1856                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1857
1858         while (i != r) {
1859                 rxb = rxq->queue[i];
1860
1861                 /* If an RXB doesn't have a Rx queue slot associated with it,
1862                  * then a bug has been introduced in the queue refilling
1863                  * routines -- catch it here */
1864                 BUG_ON(rxb == NULL);
1865
1866                 rxq->queue[i] = NULL;
1867
1868                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1869                                 priv->hw_params.rx_buf_size,
1870                                 PCI_DMA_FROMDEVICE);
1871                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1872
1873                 /* Reclaim a command buffer only if this packet is a response
1874                  *   to a (driver-originated) command.
1875                  * If the packet (e.g. Rx frame) originated from uCode,
1876                  *   there is no command buffer to reclaim.
1877                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1878                  *   but apparently a few don't get set; catch them here. */
1879                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1880                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1881                         (pkt->hdr.cmd != REPLY_TX);
1882
1883                 /* Based on type of command response or notification,
1884                  *   handle those that need handling via function in
1885                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1886                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1887                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1888                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1889                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1890                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1891                 } else {
1892                         /* No handling needed */
1893                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1894                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1895                                 r, i, get_cmd_string(pkt->hdr.cmd),
1896                                 pkt->hdr.cmd);
1897                 }
1898
1899                 if (reclaim) {
1900                         /* Invoke any callbacks, transfer the skb to caller, and
1901                          * fire off the (possibly) blocking iwl_send_cmd()
1902                          * as we reclaim the driver command queue */
1903                         if (rxb && rxb->skb)
1904                                 iwl_tx_cmd_complete(priv, rxb);
1905                         else
1906                                 IWL_WARN(priv, "Claim null rxb?\n");
1907                 }
1908
1909                 /* For now we just don't re-use anything.  We can tweak this
1910                  * later to try and re-use notification packets and SKBs that
1911                  * fail to Rx correctly */
1912                 if (rxb->skb != NULL) {
1913                         priv->alloc_rxb_skb--;
1914                         dev_kfree_skb_any(rxb->skb);
1915                         rxb->skb = NULL;
1916                 }
1917
1918                 spin_lock_irqsave(&rxq->lock, flags);
1919                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1920                 spin_unlock_irqrestore(&rxq->lock, flags);
1921                 i = (i + 1) & RX_QUEUE_MASK;
1922                 /* If there are a lot of unused frames,
1923                  * restock the Rx queue so ucode won't assert. */
1924                 if (fill_rx) {
1925                         count++;
1926                         if (count >= 8) {
1927                                 priv->rxq.read = i;
1928                                 __iwl3945_rx_replenish(priv);
1929                                 count = 0;
1930                         }
1931                 }
1932         }
1933
1934         /* Backtrack one entry */
1935         priv->rxq.read = i;
1936         iwl3945_rx_queue_restock(priv);
1937 }
1938
1939 /* call this function to flush any scheduled tasklet */
1940 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1941 {
1942         /* wait to make sure we flush pending tasklet*/
1943         synchronize_irq(priv->pci_dev->irq);
1944         tasklet_kill(&priv->irq_tasklet);
1945 }
1946
1947 static const char *desc_lookup(int i)
1948 {
1949         switch (i) {
1950         case 1:
1951                 return "FAIL";
1952         case 2:
1953                 return "BAD_PARAM";
1954         case 3:
1955                 return "BAD_CHECKSUM";
1956         case 4:
1957                 return "NMI_INTERRUPT";
1958         case 5:
1959                 return "SYSASSERT";
1960         case 6:
1961                 return "FATAL_ERROR";
1962         }
1963
1964         return "UNKNOWN";
1965 }
1966
1967 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1968 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1969
1970 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1971 {
1972         u32 i;
1973         u32 desc, time, count, base, data1;
1974         u32 blink1, blink2, ilink1, ilink2;
1975         int rc;
1976
1977         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1978
1979         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1980                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1981                 return;
1982         }
1983
1984         rc = iwl_grab_nic_access(priv);
1985         if (rc) {
1986                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1987                 return;
1988         }
1989
1990         count = iwl_read_targ_mem(priv, base);
1991
1992         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1993                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1994                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1995                         priv->status, count);
1996         }
1997
1998         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1999                   "ilink1  nmiPC   Line\n");
2000         for (i = ERROR_START_OFFSET;
2001              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
2002              i += ERROR_ELEM_SIZE) {
2003                 desc = iwl_read_targ_mem(priv, base + i);
2004                 time =
2005                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
2006                 blink1 =
2007                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
2008                 blink2 =
2009                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
2010                 ilink1 =
2011                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
2012                 ilink2 =
2013                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
2014                 data1 =
2015                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
2016
2017                 IWL_ERR(priv,
2018                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
2019                         desc_lookup(desc), desc, time, blink1, blink2,
2020                         ilink1, ilink2, data1);
2021         }
2022
2023         iwl_release_nic_access(priv);
2024
2025 }
2026
2027 #define EVENT_START_OFFSET  (6 * sizeof(u32))
2028
2029 /**
2030  * iwl3945_print_event_log - Dump error event log to syslog
2031  *
2032  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
2033  */
2034 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
2035                                 u32 num_events, u32 mode)
2036 {
2037         u32 i;
2038         u32 base;       /* SRAM byte address of event log header */
2039         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
2040         u32 ptr;        /* SRAM byte address of log data */
2041         u32 ev, time, data; /* event log data */
2042
2043         if (num_events == 0)
2044                 return;
2045
2046         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2047
2048         if (mode == 0)
2049                 event_size = 2 * sizeof(u32);
2050         else
2051                 event_size = 3 * sizeof(u32);
2052
2053         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
2054
2055         /* "time" is actually "data" for mode 0 (no timestamp).
2056          * place event id # at far right for easier visual parsing. */
2057         for (i = 0; i < num_events; i++) {
2058                 ev = iwl_read_targ_mem(priv, ptr);
2059                 ptr += sizeof(u32);
2060                 time = iwl_read_targ_mem(priv, ptr);
2061                 ptr += sizeof(u32);
2062                 if (mode == 0) {
2063                         /* data, ev */
2064                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
2065                 } else {
2066                         data = iwl_read_targ_mem(priv, ptr);
2067                         ptr += sizeof(u32);
2068                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
2069                 }
2070         }
2071 }
2072
2073 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
2074 {
2075         int rc;
2076         u32 base;       /* SRAM byte address of event log header */
2077         u32 capacity;   /* event log capacity in # entries */
2078         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
2079         u32 num_wraps;  /* # times uCode wrapped to top of log */
2080         u32 next_entry; /* index of next entry to be written by uCode */
2081         u32 size;       /* # entries that we'll print */
2082
2083         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2084         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
2085                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
2086                 return;
2087         }
2088
2089         rc = iwl_grab_nic_access(priv);
2090         if (rc) {
2091                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
2092                 return;
2093         }
2094
2095         /* event log header */
2096         capacity = iwl_read_targ_mem(priv, base);
2097         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
2098         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
2099         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
2100
2101         size = num_wraps ? capacity : next_entry;
2102
2103         /* bail out if nothing in log */
2104         if (size == 0) {
2105                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2106                 iwl_release_nic_access(priv);
2107                 return;
2108         }
2109
2110         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
2111                   size, num_wraps);
2112
2113         /* if uCode has wrapped back to top of log, start at the oldest entry,
2114          * i.e the next one that uCode would fill. */
2115         if (num_wraps)
2116                 iwl3945_print_event_log(priv, next_entry,
2117                                     capacity - next_entry, mode);
2118
2119         /* (then/else) start at top of log */
2120         iwl3945_print_event_log(priv, 0, next_entry, mode);
2121
2122         iwl_release_nic_access(priv);
2123 }
2124
2125 static void iwl3945_error_recovery(struct iwl_priv *priv)
2126 {
2127         unsigned long flags;
2128
2129         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
2130                sizeof(priv->staging_rxon));
2131         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2132         iwl3945_commit_rxon(priv);
2133
2134         iwl3945_add_station(priv, priv->bssid, 1, 0);
2135
2136         spin_lock_irqsave(&priv->lock, flags);
2137         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
2138         priv->error_recovering = 0;
2139         spin_unlock_irqrestore(&priv->lock, flags);
2140 }
2141
2142 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
2143 {
2144         u32 inta, handled = 0;
2145         u32 inta_fh;
2146         unsigned long flags;
2147 #ifdef CONFIG_IWLWIFI_DEBUG
2148         u32 inta_mask;
2149 #endif
2150
2151         spin_lock_irqsave(&priv->lock, flags);
2152
2153         /* Ack/clear/reset pending uCode interrupts.
2154          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
2155          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
2156         inta = iwl_read32(priv, CSR_INT);
2157         iwl_write32(priv, CSR_INT, inta);
2158
2159         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
2160          * Any new interrupts that happen after this, either while we're
2161          * in this tasklet, or later, will show up in next ISR/tasklet. */
2162         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2163         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
2164
2165 #ifdef CONFIG_IWLWIFI_DEBUG
2166         if (priv->debug_level & IWL_DL_ISR) {
2167                 /* just for debug */
2168                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2169                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2170                               inta, inta_mask, inta_fh);
2171         }
2172 #endif
2173
2174         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
2175          * atomic, make sure that inta covers all the interrupts that
2176          * we've discovered, even if FH interrupt came in just after
2177          * reading CSR_INT. */
2178         if (inta_fh & CSR39_FH_INT_RX_MASK)
2179                 inta |= CSR_INT_BIT_FH_RX;
2180         if (inta_fh & CSR39_FH_INT_TX_MASK)
2181                 inta |= CSR_INT_BIT_FH_TX;
2182
2183         /* Now service all interrupt bits discovered above. */
2184         if (inta & CSR_INT_BIT_HW_ERR) {
2185                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
2186
2187                 /* Tell the device to stop sending interrupts */
2188                 iwl_disable_interrupts(priv);
2189
2190                 iwl_irq_handle_error(priv);
2191
2192                 handled |= CSR_INT_BIT_HW_ERR;
2193
2194                 spin_unlock_irqrestore(&priv->lock, flags);
2195
2196                 return;
2197         }
2198
2199 #ifdef CONFIG_IWLWIFI_DEBUG
2200         if (priv->debug_level & (IWL_DL_ISR)) {
2201                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
2202                 if (inta & CSR_INT_BIT_SCD)
2203                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
2204                                       "the frame/frames.\n");
2205
2206                 /* Alive notification via Rx interrupt will do the real work */
2207                 if (inta & CSR_INT_BIT_ALIVE)
2208                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
2209         }
2210 #endif
2211         /* Safely ignore these bits for debug checks below */
2212         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
2213
2214         /* Error detected by uCode */
2215         if (inta & CSR_INT_BIT_SW_ERR) {
2216                 IWL_ERR(priv, "Microcode SW error detected. "
2217                         "Restarting 0x%X.\n", inta);
2218                 iwl_irq_handle_error(priv);
2219                 handled |= CSR_INT_BIT_SW_ERR;
2220         }
2221
2222         /* uCode wakes up after power-down sleep */
2223         if (inta & CSR_INT_BIT_WAKEUP) {
2224                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
2225                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
2226                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
2227                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
2228                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
2229                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
2230                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
2231                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
2232
2233                 handled |= CSR_INT_BIT_WAKEUP;
2234         }
2235
2236         /* All uCode command responses, including Tx command responses,
2237          * Rx "responses" (frame-received notification), and other
2238          * notifications from uCode come through here*/
2239         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
2240                 iwl3945_rx_handle(priv);
2241                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
2242         }
2243
2244         if (inta & CSR_INT_BIT_FH_TX) {
2245                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
2246
2247                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
2248                 if (!iwl_grab_nic_access(priv)) {
2249                         iwl_write_direct32(priv, FH39_TCSR_CREDIT
2250                                              (FH39_SRVC_CHNL), 0x0);
2251                         iwl_release_nic_access(priv);
2252                 }
2253                 handled |= CSR_INT_BIT_FH_TX;
2254         }
2255
2256         if (inta & ~handled)
2257                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
2258
2259         if (inta & ~CSR_INI_SET_MASK) {
2260                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
2261                          inta & ~CSR_INI_SET_MASK);
2262                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
2263         }
2264
2265         /* Re-enable all interrupts */
2266         /* only Re-enable if disabled by irq */
2267         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2268                 iwl_enable_interrupts(priv);
2269
2270 #ifdef CONFIG_IWLWIFI_DEBUG
2271         if (priv->debug_level & (IWL_DL_ISR)) {
2272                 inta = iwl_read32(priv, CSR_INT);
2273                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2274                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2275                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
2276                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
2277         }
2278 #endif
2279         spin_unlock_irqrestore(&priv->lock, flags);
2280 }
2281
2282 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
2283                                          enum ieee80211_band band,
2284                                      u8 is_active, u8 n_probes,
2285                                      struct iwl3945_scan_channel *scan_ch)
2286 {
2287         const struct ieee80211_channel *channels = NULL;
2288         const struct ieee80211_supported_band *sband;
2289         const struct iwl_channel_info *ch_info;
2290         u16 passive_dwell = 0;
2291         u16 active_dwell = 0;
2292         int added, i;
2293
2294         sband = iwl_get_hw_mode(priv, band);
2295         if (!sband)
2296                 return 0;
2297
2298         channels = sband->channels;
2299
2300         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
2301         passive_dwell = iwl_get_passive_dwell_time(priv, band);
2302
2303         if (passive_dwell <= active_dwell)
2304                 passive_dwell = active_dwell + 1;
2305
2306         for (i = 0, added = 0; i < sband->n_channels; i++) {
2307                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
2308                         continue;
2309
2310                 scan_ch->channel = channels[i].hw_value;
2311
2312                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
2313                 if (!is_channel_valid(ch_info)) {
2314                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
2315                                        scan_ch->channel);
2316                         continue;
2317                 }
2318
2319                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
2320                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
2321                 /* If passive , set up for auto-switch
2322                  *  and use long active_dwell time.
2323                  */
2324                 if (!is_active || is_channel_passive(ch_info) ||
2325                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
2326                         scan_ch->type = 0;      /* passive */
2327                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
2328                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
2329                 } else {
2330                         scan_ch->type = 1;      /* active */
2331                 }
2332
2333                 /* Set direct probe bits. These may be used both for active
2334                  * scan channels (probes gets sent right away),
2335                  * or for passive channels (probes get se sent only after
2336                  * hearing clear Rx packet).*/
2337                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
2338                         if (n_probes)
2339                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2340                 } else {
2341                         /* uCode v1 does not allow setting direct probe bits on
2342                          * passive channel. */
2343                         if ((scan_ch->type & 1) && n_probes)
2344                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2345                 }
2346
2347                 /* Set txpower levels to defaults */
2348                 scan_ch->tpc.dsp_atten = 110;
2349                 /* scan_pwr_info->tpc.dsp_atten; */
2350
2351                 /*scan_pwr_info->tpc.tx_gain; */
2352                 if (band == IEEE80211_BAND_5GHZ)
2353                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
2354                 else {
2355                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
2356                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
2357                          * power level:
2358                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
2359                          */
2360                 }
2361
2362                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
2363                                scan_ch->channel,
2364                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
2365                                (scan_ch->type & 1) ?
2366                                active_dwell : passive_dwell);
2367
2368                 scan_ch++;
2369                 added++;
2370         }
2371
2372         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
2373         return added;
2374 }
2375
2376 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
2377                               struct ieee80211_rate *rates)
2378 {
2379         int i;
2380
2381         for (i = 0; i < IWL_RATE_COUNT; i++) {
2382                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
2383                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
2384                 rates[i].hw_value_short = i;
2385                 rates[i].flags = 0;
2386                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
2387                         /*
2388                          * If CCK != 1M then set short preamble rate flag.
2389                          */
2390                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
2391                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
2392                 }
2393         }
2394 }
2395
2396 /******************************************************************************
2397  *
2398  * uCode download functions
2399  *
2400  ******************************************************************************/
2401
2402 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
2403 {
2404         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2405         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2406         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2407         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2408         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2409         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2410 }
2411
2412 /**
2413  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2414  *     looking at all data.
2415  */
2416 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2417 {
2418         u32 val;
2419         u32 save_len = len;
2420         int rc = 0;
2421         u32 errcnt;
2422
2423         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2424
2425         rc = iwl_grab_nic_access(priv);
2426         if (rc)
2427                 return rc;
2428
2429         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2430                                IWL39_RTC_INST_LOWER_BOUND);
2431
2432         errcnt = 0;
2433         for (; len > 0; len -= sizeof(u32), image++) {
2434                 /* read data comes through single port, auto-incr addr */
2435                 /* NOTE: Use the debugless read so we don't flood kernel log
2436                  * if IWL_DL_IO is set */
2437                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2438                 if (val != le32_to_cpu(*image)) {
2439                         IWL_ERR(priv, "uCode INST section is invalid at "
2440                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2441                                   save_len - len, val, le32_to_cpu(*image));
2442                         rc = -EIO;
2443                         errcnt++;
2444                         if (errcnt >= 20)
2445                                 break;
2446                 }
2447         }
2448
2449         iwl_release_nic_access(priv);
2450
2451         if (!errcnt)
2452                 IWL_DEBUG_INFO(priv,
2453                         "ucode image in INSTRUCTION memory is good\n");
2454
2455         return rc;
2456 }
2457
2458
2459 /**
2460  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2461  *   using sample data 100 bytes apart.  If these sample points are good,
2462  *   it's a pretty good bet that everything between them is good, too.
2463  */
2464 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2465 {
2466         u32 val;
2467         int rc = 0;
2468         u32 errcnt = 0;
2469         u32 i;
2470
2471         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2472
2473         rc = iwl_grab_nic_access(priv);
2474         if (rc)
2475                 return rc;
2476
2477         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2478                 /* read data comes through single port, auto-incr addr */
2479                 /* NOTE: Use the debugless read so we don't flood kernel log
2480                  * if IWL_DL_IO is set */
2481                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2482                         i + IWL39_RTC_INST_LOWER_BOUND);
2483                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2484                 if (val != le32_to_cpu(*image)) {
2485 #if 0 /* Enable this if you want to see details */
2486                         IWL_ERR(priv, "uCode INST section is invalid at "
2487                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2488                                   i, val, *image);
2489 #endif
2490                         rc = -EIO;
2491                         errcnt++;
2492                         if (errcnt >= 3)
2493                                 break;
2494                 }
2495         }
2496
2497         iwl_release_nic_access(priv);
2498
2499         return rc;
2500 }
2501
2502
2503 /**
2504  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2505  *    and verify its contents
2506  */
2507 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2508 {
2509         __le32 *image;
2510         u32 len;
2511         int rc = 0;
2512
2513         /* Try bootstrap */
2514         image = (__le32 *)priv->ucode_boot.v_addr;
2515         len = priv->ucode_boot.len;
2516         rc = iwl3945_verify_inst_sparse(priv, image, len);
2517         if (rc == 0) {
2518                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2519                 return 0;
2520         }
2521
2522         /* Try initialize */
2523         image = (__le32 *)priv->ucode_init.v_addr;
2524         len = priv->ucode_init.len;
2525         rc = iwl3945_verify_inst_sparse(priv, image, len);
2526         if (rc == 0) {
2527                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2528                 return 0;
2529         }
2530
2531         /* Try runtime/protocol */
2532         image = (__le32 *)priv->ucode_code.v_addr;
2533         len = priv->ucode_code.len;
2534         rc = iwl3945_verify_inst_sparse(priv, image, len);
2535         if (rc == 0) {
2536                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2537                 return 0;
2538         }
2539
2540         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2541
2542         /* Since nothing seems to match, show first several data entries in
2543          * instruction SRAM, so maybe visual inspection will give a clue.
2544          * Selection of bootstrap image (vs. other images) is arbitrary. */
2545         image = (__le32 *)priv->ucode_boot.v_addr;
2546         len = priv->ucode_boot.len;
2547         rc = iwl3945_verify_inst_full(priv, image, len);
2548
2549         return rc;
2550 }
2551
2552 static void iwl3945_nic_start(struct iwl_priv *priv)
2553 {
2554         /* Remove all resets to allow NIC to operate */
2555         iwl_write32(priv, CSR_RESET, 0);
2556 }
2557
2558 /**
2559  * iwl3945_read_ucode - Read uCode images from disk file.
2560  *
2561  * Copy into buffers for card to fetch via bus-mastering
2562  */
2563 static int iwl3945_read_ucode(struct iwl_priv *priv)
2564 {
2565         struct iwl_ucode *ucode;
2566         int ret = -EINVAL, index;
2567         const struct firmware *ucode_raw;
2568         /* firmware file name contains uCode/driver compatibility version */
2569         const char *name_pre = priv->cfg->fw_name_pre;
2570         const unsigned int api_max = priv->cfg->ucode_api_max;
2571         const unsigned int api_min = priv->cfg->ucode_api_min;
2572         char buf[25];
2573         u8 *src;
2574         size_t len;
2575         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2576
2577         /* Ask kernel firmware_class module to get the boot firmware off disk.
2578          * request_firmware() is synchronous, file is in memory on return. */
2579         for (index = api_max; index >= api_min; index--) {
2580                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2581                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2582                 if (ret < 0) {
2583                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2584                                   buf, ret);
2585                         if (ret == -ENOENT)
2586                                 continue;
2587                         else
2588                                 goto error;
2589                 } else {
2590                         if (index < api_max)
2591                                 IWL_ERR(priv, "Loaded firmware %s, "
2592                                         "which is deprecated. "
2593                                         " Please use API v%u instead.\n",
2594                                           buf, api_max);
2595                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2596                                        "(%zd bytes) from disk\n",
2597                                        buf, ucode_raw->size);
2598                         break;
2599                 }
2600         }
2601
2602         if (ret < 0)
2603                 goto error;
2604
2605         /* Make sure that we got at least our header! */
2606         if (ucode_raw->size < sizeof(*ucode)) {
2607                 IWL_ERR(priv, "File size way too small!\n");
2608                 ret = -EINVAL;
2609                 goto err_release;
2610         }
2611
2612         /* Data from ucode file:  header followed by uCode images */
2613         ucode = (void *)ucode_raw->data;
2614
2615         priv->ucode_ver = le32_to_cpu(ucode->ver);
2616         api_ver = IWL_UCODE_API(priv->ucode_ver);
2617         inst_size = le32_to_cpu(ucode->inst_size);
2618         data_size = le32_to_cpu(ucode->data_size);
2619         init_size = le32_to_cpu(ucode->init_size);
2620         init_data_size = le32_to_cpu(ucode->init_data_size);
2621         boot_size = le32_to_cpu(ucode->boot_size);
2622
2623         /* api_ver should match the api version forming part of the
2624          * firmware filename ... but we don't check for that and only rely
2625          * on the API version read from firmware header from here on forward */
2626
2627         if (api_ver < api_min || api_ver > api_max) {
2628                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2629                           "Driver supports v%u, firmware is v%u.\n",
2630                           api_max, api_ver);
2631                 priv->ucode_ver = 0;
2632                 ret = -EINVAL;
2633                 goto err_release;
2634         }
2635         if (api_ver != api_max)
2636                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2637                           "got %u. New firmware can be obtained "
2638                           "from http://www.intellinuxwireless.org.\n",
2639                           api_max, api_ver);
2640
2641         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2642                 IWL_UCODE_MAJOR(priv->ucode_ver),
2643                 IWL_UCODE_MINOR(priv->ucode_ver),
2644                 IWL_UCODE_API(priv->ucode_ver),
2645                 IWL_UCODE_SERIAL(priv->ucode_ver));
2646
2647         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2648                        priv->ucode_ver);
2649         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2650                        inst_size);
2651         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2652                        data_size);
2653         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2654                        init_size);
2655         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2656                        init_data_size);
2657         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2658                        boot_size);
2659
2660
2661         /* Verify size of file vs. image size info in file's header */
2662         if (ucode_raw->size < sizeof(*ucode) +
2663                 inst_size + data_size + init_size +
2664                 init_data_size + boot_size) {
2665
2666                 IWL_DEBUG_INFO(priv, "uCode file size %zd too small\n",
2667                                ucode_raw->size);
2668                 ret = -EINVAL;
2669                 goto err_release;
2670         }
2671
2672         /* Verify that uCode images will fit in card's SRAM */
2673         if (inst_size > IWL39_MAX_INST_SIZE) {
2674                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2675                                inst_size);
2676                 ret = -EINVAL;
2677                 goto err_release;
2678         }
2679
2680         if (data_size > IWL39_MAX_DATA_SIZE) {
2681                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2682                                data_size);
2683                 ret = -EINVAL;
2684                 goto err_release;
2685         }
2686         if (init_size > IWL39_MAX_INST_SIZE) {
2687                 IWL_DEBUG_INFO(priv,
2688                                 "uCode init instr len %d too large to fit in\n",
2689                                 init_size);
2690                 ret = -EINVAL;
2691                 goto err_release;
2692         }
2693         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2694                 IWL_DEBUG_INFO(priv,
2695                                 "uCode init data len %d too large to fit in\n",
2696                                 init_data_size);
2697                 ret = -EINVAL;
2698                 goto err_release;
2699         }
2700         if (boot_size > IWL39_MAX_BSM_SIZE) {
2701                 IWL_DEBUG_INFO(priv,
2702                                 "uCode boot instr len %d too large to fit in\n",
2703                                 boot_size);
2704                 ret = -EINVAL;
2705                 goto err_release;
2706         }
2707
2708         /* Allocate ucode buffers for card's bus-master loading ... */
2709
2710         /* Runtime instructions and 2 copies of data:
2711          * 1) unmodified from disk
2712          * 2) backup cache for save/restore during power-downs */
2713         priv->ucode_code.len = inst_size;
2714         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2715
2716         priv->ucode_data.len = data_size;
2717         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2718
2719         priv->ucode_data_backup.len = data_size;
2720         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2721
2722         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2723             !priv->ucode_data_backup.v_addr)
2724                 goto err_pci_alloc;
2725
2726         /* Initialization instructions and data */
2727         if (init_size && init_data_size) {
2728                 priv->ucode_init.len = init_size;
2729                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2730
2731                 priv->ucode_init_data.len = init_data_size;
2732                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2733
2734                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2735                         goto err_pci_alloc;
2736         }
2737
2738         /* Bootstrap (instructions only, no data) */
2739         if (boot_size) {
2740                 priv->ucode_boot.len = boot_size;
2741                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2742
2743                 if (!priv->ucode_boot.v_addr)
2744                         goto err_pci_alloc;
2745         }
2746
2747         /* Copy images into buffers for card's bus-master reads ... */
2748
2749         /* Runtime instructions (first block of data in file) */
2750         src = &ucode->data[0];
2751         len = priv->ucode_code.len;
2752         IWL_DEBUG_INFO(priv,
2753                 "Copying (but not loading) uCode instr len %zd\n", len);
2754         memcpy(priv->ucode_code.v_addr, src, len);
2755         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2756                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2757
2758         /* Runtime data (2nd block)
2759          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2760         src = &ucode->data[inst_size];
2761         len = priv->ucode_data.len;
2762         IWL_DEBUG_INFO(priv,
2763                 "Copying (but not loading) uCode data len %zd\n", len);
2764         memcpy(priv->ucode_data.v_addr, src, len);
2765         memcpy(priv->ucode_data_backup.v_addr, src, len);
2766
2767         /* Initialization instructions (3rd block) */
2768         if (init_size) {
2769                 src = &ucode->data[inst_size + data_size];
2770                 len = priv->ucode_init.len;
2771                 IWL_DEBUG_INFO(priv,
2772                         "Copying (but not loading) init instr len %zd\n", len);
2773                 memcpy(priv->ucode_init.v_addr, src, len);
2774         }
2775
2776         /* Initialization data (4th block) */
2777         if (init_data_size) {
2778                 src = &ucode->data[inst_size + data_size + init_size];
2779                 len = priv->ucode_init_data.len;
2780                 IWL_DEBUG_INFO(priv,
2781                         "Copying (but not loading) init data len %zd\n", len);
2782                 memcpy(priv->ucode_init_data.v_addr, src, len);
2783         }
2784
2785         /* Bootstrap instructions (5th block) */
2786         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
2787         len = priv->ucode_boot.len;
2788         IWL_DEBUG_INFO(priv,
2789                 "Copying (but not loading) boot instr len %zd\n", len);
2790         memcpy(priv->ucode_boot.v_addr, src, len);
2791
2792         /* We have our copies now, allow OS release its copies */
2793         release_firmware(ucode_raw);
2794         return 0;
2795
2796  err_pci_alloc:
2797         IWL_ERR(priv, "failed to allocate pci memory\n");
2798         ret = -ENOMEM;
2799         iwl3945_dealloc_ucode_pci(priv);
2800
2801  err_release:
2802         release_firmware(ucode_raw);
2803
2804  error:
2805         return ret;
2806 }
2807
2808
2809 /**
2810  * iwl3945_set_ucode_ptrs - Set uCode address location
2811  *
2812  * Tell initialization uCode where to find runtime uCode.
2813  *
2814  * BSM registers initially contain pointers to initialization uCode.
2815  * We need to replace them to load runtime uCode inst and data,
2816  * and to save runtime data when powering down.
2817  */
2818 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2819 {
2820         dma_addr_t pinst;
2821         dma_addr_t pdata;
2822         int rc = 0;
2823         unsigned long flags;
2824
2825         /* bits 31:0 for 3945 */
2826         pinst = priv->ucode_code.p_addr;
2827         pdata = priv->ucode_data_backup.p_addr;
2828
2829         spin_lock_irqsave(&priv->lock, flags);
2830         rc = iwl_grab_nic_access(priv);
2831         if (rc) {
2832                 spin_unlock_irqrestore(&priv->lock, flags);
2833                 return rc;
2834         }
2835
2836         /* Tell bootstrap uCode where to find image to load */
2837         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2838         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2839         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2840                                  priv->ucode_data.len);
2841
2842         /* Inst byte count must be last to set up, bit 31 signals uCode
2843          *   that all new ptr/size info is in place */
2844         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2845                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2846
2847         iwl_release_nic_access(priv);
2848
2849         spin_unlock_irqrestore(&priv->lock, flags);
2850
2851         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2852
2853         return rc;
2854 }
2855
2856 /**
2857  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2858  *
2859  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2860  *
2861  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2862  */
2863 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2864 {
2865         /* Check alive response for "valid" sign from uCode */
2866         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2867                 /* We had an error bringing up the hardware, so take it
2868                  * all the way back down so we can try again */
2869                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2870                 goto restart;
2871         }
2872
2873         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2874          * This is a paranoid check, because we would not have gotten the
2875          * "initialize" alive if code weren't properly loaded.  */
2876         if (iwl3945_verify_ucode(priv)) {
2877                 /* Runtime instruction load was bad;
2878                  * take it all the way back down so we can try again */
2879                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2880                 goto restart;
2881         }
2882
2883         /* Send pointers to protocol/runtime uCode image ... init code will
2884          * load and launch runtime uCode, which will send us another "Alive"
2885          * notification. */
2886         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2887         if (iwl3945_set_ucode_ptrs(priv)) {
2888                 /* Runtime instruction load won't happen;
2889                  * take it all the way back down so we can try again */
2890                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2891                 goto restart;
2892         }
2893         return;
2894
2895  restart:
2896         queue_work(priv->workqueue, &priv->restart);
2897 }
2898
2899
2900 /* temporary */
2901 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw,
2902                                      struct sk_buff *skb);
2903
2904 /**
2905  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2906  *                   from protocol/runtime uCode (initialization uCode's
2907  *                   Alive gets handled by iwl3945_init_alive_start()).
2908  */
2909 static void iwl3945_alive_start(struct iwl_priv *priv)
2910 {
2911         int rc = 0;
2912         int thermal_spin = 0;
2913         u32 rfkill;
2914
2915         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2916
2917         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2918                 /* We had an error bringing up the hardware, so take it
2919                  * all the way back down so we can try again */
2920                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2921                 goto restart;
2922         }
2923
2924         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2925          * This is a paranoid check, because we would not have gotten the
2926          * "runtime" alive if code weren't properly loaded.  */
2927         if (iwl3945_verify_ucode(priv)) {
2928                 /* Runtime instruction load was bad;
2929                  * take it all the way back down so we can try again */
2930                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2931                 goto restart;
2932         }
2933
2934         iwl3945_clear_stations_table(priv);
2935
2936         rc = iwl_grab_nic_access(priv);
2937         if (rc) {
2938                 IWL_WARN(priv, "Can not read RFKILL status from adapter\n");
2939                 return;
2940         }
2941
2942         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2943         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2944         iwl_release_nic_access(priv);
2945
2946         if (rfkill & 0x1) {
2947                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2948                 /* if RFKILL is not on, then wait for thermal
2949                  * sensor in adapter to kick in */
2950                 while (iwl3945_hw_get_temperature(priv) == 0) {
2951                         thermal_spin++;
2952                         udelay(10);
2953                 }
2954
2955                 if (thermal_spin)
2956                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2957                                        thermal_spin * 10);
2958         } else
2959                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2960
2961         /* After the ALIVE response, we can send commands to 3945 uCode */
2962         set_bit(STATUS_ALIVE, &priv->status);
2963
2964         /* Clear out the uCode error bit if it is set */
2965         clear_bit(STATUS_FW_ERROR, &priv->status);
2966
2967         if (iwl_is_rfkill(priv))
2968                 return;
2969
2970         ieee80211_wake_queues(priv->hw);
2971
2972         priv->active_rate = priv->rates_mask;
2973         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2974
2975         iwl_power_update_mode(priv, false);
2976
2977         if (iwl_is_associated(priv)) {
2978                 struct iwl3945_rxon_cmd *active_rxon =
2979                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2980
2981                 memcpy(&priv->staging_rxon, &priv->active_rxon,
2982                        sizeof(priv->staging_rxon));
2983                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2984         } else {
2985                 /* Initialize our rx_config data */
2986                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2987         }
2988
2989         /* Configure Bluetooth device coexistence support */
2990         iwl_send_bt_config(priv);
2991
2992         /* Configure the adapter for unassociated operation */
2993         iwl3945_commit_rxon(priv);
2994
2995         iwl3945_reg_txpower_periodic(priv);
2996
2997         iwl3945_led_register(priv);
2998
2999         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
3000         set_bit(STATUS_READY, &priv->status);
3001         wake_up_interruptible(&priv->wait_command_queue);
3002
3003         if (priv->error_recovering)
3004                 iwl3945_error_recovery(priv);
3005
3006         /* reassociate for ADHOC mode */
3007         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
3008                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
3009                                                                 priv->vif);
3010                 if (beacon)
3011                         iwl3945_mac_beacon_update(priv->hw, beacon);
3012         }
3013
3014         return;
3015
3016  restart:
3017         queue_work(priv->workqueue, &priv->restart);
3018 }
3019
3020 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
3021
3022 static void __iwl3945_down(struct iwl_priv *priv)
3023 {
3024         unsigned long flags;
3025         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
3026         struct ieee80211_conf *conf = NULL;
3027
3028         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
3029
3030         conf = ieee80211_get_hw_conf(priv->hw);
3031
3032         if (!exit_pending)
3033                 set_bit(STATUS_EXIT_PENDING, &priv->status);
3034
3035         iwl3945_led_unregister(priv);
3036         iwl3945_clear_stations_table(priv);
3037
3038         /* Unblock any waiting calls */
3039         wake_up_interruptible_all(&priv->wait_command_queue);
3040
3041         /* Wipe out the EXIT_PENDING status bit if we are not actually
3042          * exiting the module */
3043         if (!exit_pending)
3044                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
3045
3046         /* stop and reset the on-board processor */
3047         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3048
3049         /* tell the device to stop sending interrupts */
3050         spin_lock_irqsave(&priv->lock, flags);
3051         iwl_disable_interrupts(priv);
3052         spin_unlock_irqrestore(&priv->lock, flags);
3053         iwl_synchronize_irq(priv);
3054
3055         if (priv->mac80211_registered)
3056                 ieee80211_stop_queues(priv->hw);
3057
3058         /* If we have not previously called iwl3945_init() then
3059          * clear all bits but the RF Kill and SUSPEND bits and return */
3060         if (!iwl_is_init(priv)) {
3061                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
3062                                         STATUS_RF_KILL_HW |
3063                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
3064                                         STATUS_RF_KILL_SW |
3065                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
3066                                         STATUS_GEO_CONFIGURED |
3067                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
3068                                         STATUS_IN_SUSPEND |
3069                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
3070                                         STATUS_EXIT_PENDING;
3071                 goto exit;
3072         }
3073
3074         /* ...otherwise clear out all the status bits but the RF Kill and
3075          * SUSPEND bits and continue taking the NIC down. */
3076         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
3077                                 STATUS_RF_KILL_HW |
3078                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
3079                                 STATUS_RF_KILL_SW |
3080                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
3081                                 STATUS_GEO_CONFIGURED |
3082                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
3083                                 STATUS_IN_SUSPEND |
3084                         test_bit(STATUS_FW_ERROR, &priv->status) <<
3085                                 STATUS_FW_ERROR |
3086                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
3087                                 STATUS_EXIT_PENDING;
3088
3089         priv->cfg->ops->lib->apm_ops.reset(priv);
3090         spin_lock_irqsave(&priv->lock, flags);
3091         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3092         spin_unlock_irqrestore(&priv->lock, flags);
3093
3094         iwl3945_hw_txq_ctx_stop(priv);
3095         iwl3945_hw_rxq_stop(priv);
3096
3097         spin_lock_irqsave(&priv->lock, flags);
3098         if (!iwl_grab_nic_access(priv)) {
3099                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
3100                                          APMG_CLK_VAL_DMA_CLK_RQT);
3101                 iwl_release_nic_access(priv);
3102         }
3103         spin_unlock_irqrestore(&priv->lock, flags);
3104
3105         udelay(5);
3106
3107         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
3108                 priv->cfg->ops->lib->apm_ops.stop(priv);
3109         else
3110                 priv->cfg->ops->lib->apm_ops.reset(priv);
3111
3112  exit:
3113         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
3114
3115         if (priv->ibss_beacon)
3116                 dev_kfree_skb(priv->ibss_beacon);
3117         priv->ibss_beacon = NULL;
3118
3119         /* clear out any free frames */
3120         iwl3945_clear_free_frames(priv);
3121 }
3122
3123 static void iwl3945_down(struct iwl_priv *priv)
3124 {
3125         mutex_lock(&priv->mutex);
3126         __iwl3945_down(priv);
3127         mutex_unlock(&priv->mutex);
3128
3129         iwl3945_cancel_deferred_work(priv);
3130 }
3131
3132 #define MAX_HW_RESTARTS 5
3133
3134 static int __iwl3945_up(struct iwl_priv *priv)
3135 {
3136         int rc, i;
3137
3138         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3139                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
3140                 return -EIO;
3141         }
3142
3143         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
3144                 IWL_WARN(priv, "Radio disabled by SW RF kill (module "
3145                             "parameter)\n");
3146                 return -ENODEV;
3147         }
3148
3149         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
3150                 IWL_ERR(priv, "ucode not available for device bring up\n");
3151                 return -EIO;
3152         }
3153
3154         /* If platform's RF_KILL switch is NOT set to KILL */
3155         if (iwl_read32(priv, CSR_GP_CNTRL) &
3156                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3157                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3158         else {
3159                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3160                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
3161                         IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
3162                         return -ENODEV;
3163                 }
3164         }
3165
3166         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
3167
3168         rc = iwl3945_hw_nic_init(priv);
3169         if (rc) {
3170                 IWL_ERR(priv, "Unable to int nic\n");
3171                 return rc;
3172         }
3173
3174         /* make sure rfkill handshake bits are cleared */
3175         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3176         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3177                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3178
3179         /* clear (again), then enable host interrupts */
3180         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
3181         iwl_enable_interrupts(priv);
3182
3183         /* really make sure rfkill handshake bits are cleared */
3184         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3185         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3186
3187         /* Copy original ucode data image from disk into backup cache.
3188          * This will be used to initialize the on-board processor's
3189          * data SRAM for a clean start when the runtime program first loads. */
3190         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
3191                priv->ucode_data.len);
3192
3193         /* We return success when we resume from suspend and rf_kill is on. */
3194         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
3195                 return 0;
3196
3197         for (i = 0; i < MAX_HW_RESTARTS; i++) {
3198
3199                 iwl3945_clear_stations_table(priv);
3200
3201                 /* load bootstrap state machine,
3202                  * load bootstrap program into processor's memory,
3203                  * prepare to load the "initialize" uCode */
3204                 priv->cfg->ops->lib->load_ucode(priv);
3205
3206                 if (rc) {
3207                         IWL_ERR(priv,
3208                                 "Unable to set up bootstrap uCode: %d\n", rc);
3209                         continue;
3210                 }
3211
3212                 /* start card; "initialize" will load runtime ucode */
3213                 iwl3945_nic_start(priv);
3214
3215                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
3216
3217                 return 0;
3218         }
3219
3220         set_bit(STATUS_EXIT_PENDING, &priv->status);
3221         __iwl3945_down(priv);
3222         clear_bit(STATUS_EXIT_PENDING, &priv->status);
3223
3224         /* tried to restart and config the device for as long as our
3225          * patience could withstand */
3226         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
3227         return -EIO;
3228 }
3229
3230
3231 /*****************************************************************************
3232  *
3233  * Workqueue callbacks
3234  *
3235  *****************************************************************************/
3236
3237 static void iwl3945_bg_init_alive_start(struct work_struct *data)
3238 {
3239         struct iwl_priv *priv =
3240             container_of(data, struct iwl_priv, init_alive_start.work);
3241
3242         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3243                 return;
3244
3245         mutex_lock(&priv->mutex);
3246         iwl3945_init_alive_start(priv);
3247         mutex_unlock(&priv->mutex);
3248 }
3249
3250 static void iwl3945_bg_alive_start(struct work_struct *data)
3251 {
3252         struct iwl_priv *priv =
3253             container_of(data, struct iwl_priv, alive_start.work);
3254
3255         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3256                 return;
3257
3258         mutex_lock(&priv->mutex);
3259         iwl3945_alive_start(priv);
3260         mutex_unlock(&priv->mutex);
3261 }
3262
3263 static void iwl3945_rfkill_poll(struct work_struct *data)
3264 {
3265         struct iwl_priv *priv =
3266             container_of(data, struct iwl_priv, rfkill_poll.work);
3267         unsigned long status = priv->status;
3268
3269         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3270                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3271         else
3272                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3273
3274         if (test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))
3275                 queue_work(priv->workqueue, &priv->rf_kill);
3276
3277         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3278                            round_jiffies_relative(2 * HZ));
3279
3280 }
3281
3282 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
3283 static void iwl3945_bg_request_scan(struct work_struct *data)
3284 {
3285         struct iwl_priv *priv =
3286             container_of(data, struct iwl_priv, request_scan);
3287         struct iwl_host_cmd cmd = {
3288                 .id = REPLY_SCAN_CMD,
3289                 .len = sizeof(struct iwl3945_scan_cmd),
3290                 .meta.flags = CMD_SIZE_HUGE,
3291         };
3292         int rc = 0;
3293         struct iwl3945_scan_cmd *scan;
3294         struct ieee80211_conf *conf = NULL;
3295         u8 n_probes = 2;
3296         enum ieee80211_band band;
3297         DECLARE_SSID_BUF(ssid);
3298
3299         conf = ieee80211_get_hw_conf(priv->hw);
3300
3301         mutex_lock(&priv->mutex);
3302
3303         if (!iwl_is_ready(priv)) {
3304                 IWL_WARN(priv, "request scan called when driver not ready.\n");
3305                 goto done;
3306         }
3307
3308         /* Make sure the scan wasn't canceled before this queued work
3309          * was given the chance to run... */
3310         if (!test_bit(STATUS_SCANNING, &priv->status))
3311                 goto done;
3312
3313         /* This should never be called or scheduled if there is currently
3314          * a scan active in the hardware. */
3315         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
3316                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
3317                                 "Ignoring second request.\n");
3318                 rc = -EIO;
3319                 goto done;
3320         }
3321
3322         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3323                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
3324                 goto done;
3325         }
3326
3327         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3328                 IWL_DEBUG_HC(priv,
3329                         "Scan request while abort pending. Queuing.\n");
3330                 goto done;
3331         }
3332
3333         if (iwl_is_rfkill(priv)) {
3334                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
3335                 goto done;
3336         }
3337
3338         if (!test_bit(STATUS_READY, &priv->status)) {
3339                 IWL_DEBUG_HC(priv,
3340                         "Scan request while uninitialized. Queuing.\n");
3341                 goto done;
3342         }
3343
3344         if (!priv->scan_bands) {
3345                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
3346                 goto done;
3347         }
3348
3349         if (!priv->scan) {
3350                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
3351                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
3352                 if (!priv->scan) {
3353                         rc = -ENOMEM;
3354                         goto done;
3355                 }
3356         }
3357         scan = priv->scan;
3358         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
3359
3360         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
3361         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
3362
3363         if (iwl_is_associated(priv)) {
3364                 u16 interval = 0;
3365                 u32 extra;
3366                 u32 suspend_time = 100;
3367                 u32 scan_suspend_time = 100;
3368                 unsigned long flags;
3369
3370                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
3371
3372                 spin_lock_irqsave(&priv->lock, flags);
3373                 interval = priv->beacon_int;
3374                 spin_unlock_irqrestore(&priv->lock, flags);
3375
3376                 scan->suspend_time = 0;
3377                 scan->max_out_time = cpu_to_le32(200 * 1024);
3378                 if (!interval)
3379                         interval = suspend_time;
3380                 /*
3381                  * suspend time format:
3382                  *  0-19: beacon interval in usec (time before exec.)
3383                  * 20-23: 0
3384                  * 24-31: number of beacons (suspend between channels)
3385                  */
3386
3387                 extra = (suspend_time / interval) << 24;
3388                 scan_suspend_time = 0xFF0FFFFF &
3389                     (extra | ((suspend_time % interval) * 1024));
3390
3391                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
3392                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
3393                                scan_suspend_time, interval);
3394         }
3395
3396         /* We should add the ability for user to lock to PASSIVE ONLY */
3397         if (priv->one_direct_scan) {
3398                 IWL_DEBUG_SCAN(priv, "Kicking off one direct scan for '%s'\n",
3399                                 print_ssid(ssid, priv->direct_ssid,
3400                                 priv->direct_ssid_len));
3401                 scan->direct_scan[0].id = WLAN_EID_SSID;
3402                 scan->direct_scan[0].len = priv->direct_ssid_len;
3403                 memcpy(scan->direct_scan[0].ssid,
3404                        priv->direct_ssid, priv->direct_ssid_len);
3405                 n_probes++;
3406         } else
3407                 IWL_DEBUG_SCAN(priv, "Kicking off one indirect scan.\n");
3408
3409         /* We don't build a direct scan probe request; the uCode will do
3410          * that based on the direct_mask added to each channel entry */
3411         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
3412         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
3413         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3414
3415         /* flags + rate selection */
3416
3417         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
3418                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
3419                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
3420                 scan->good_CRC_th = 0;
3421                 band = IEEE80211_BAND_2GHZ;
3422         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
3423                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
3424                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
3425                 band = IEEE80211_BAND_5GHZ;
3426         } else {
3427                 IWL_WARN(priv, "Invalid scan band count\n");
3428                 goto done;
3429         }
3430
3431         scan->tx_cmd.len = cpu_to_le16(
3432                 iwl_fill_probe_req(priv, band,
3433                                    (struct ieee80211_mgmt *)scan->data,
3434                                    IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3435
3436         /* select Rx antennas */
3437         scan->flags |= iwl3945_get_antenna_flags(priv);
3438
3439         if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
3440                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3441
3442         scan->channel_count =
3443                 iwl3945_get_channels_for_scan(priv, band, 1, /* active */
3444                                               n_probes,
3445                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3446
3447         if (scan->channel_count == 0) {
3448                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3449                 goto done;
3450         }
3451
3452         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3453             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3454         cmd.data = scan;
3455         scan->len = cpu_to_le16(cmd.len);
3456
3457         set_bit(STATUS_SCAN_HW, &priv->status);
3458         rc = iwl_send_cmd_sync(priv, &cmd);
3459         if (rc)
3460                 goto done;
3461
3462         queue_delayed_work(priv->workqueue, &priv->scan_check,
3463                            IWL_SCAN_CHECK_WATCHDOG);
3464
3465         mutex_unlock(&priv->mutex);
3466         return;
3467
3468  done:
3469         /* can not perform scan make sure we clear scanning
3470          * bits from status so next scan request can be performed.
3471          * if we dont clear scanning status bit here all next scan
3472          * will fail
3473         */
3474         clear_bit(STATUS_SCAN_HW, &priv->status);
3475         clear_bit(STATUS_SCANNING, &priv->status);
3476
3477         /* inform mac80211 scan aborted */
3478         queue_work(priv->workqueue, &priv->scan_completed);
3479         mutex_unlock(&priv->mutex);
3480 }
3481
3482 static void iwl3945_bg_up(struct work_struct *data)
3483 {
3484         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3485
3486         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3487                 return;
3488
3489         mutex_lock(&priv->mutex);
3490         __iwl3945_up(priv);
3491         mutex_unlock(&priv->mutex);
3492         iwl_rfkill_set_hw_state(priv);
3493 }
3494
3495 static void iwl3945_bg_restart(struct work_struct *data)
3496 {
3497         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3498
3499         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3500                 return;
3501
3502         iwl3945_down(priv);
3503         queue_work(priv->workqueue, &priv->up);
3504 }
3505
3506 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3507 {
3508         struct iwl_priv *priv =
3509             container_of(data, struct iwl_priv, rx_replenish);
3510
3511         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3512                 return;
3513
3514         mutex_lock(&priv->mutex);
3515         iwl3945_rx_replenish(priv);
3516         mutex_unlock(&priv->mutex);
3517 }
3518
3519 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3520
3521 static void iwl3945_post_associate(struct iwl_priv *priv)
3522 {
3523         int rc = 0;
3524         struct ieee80211_conf *conf = NULL;
3525
3526         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3527                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3528                 return;
3529         }
3530
3531
3532         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3533                         priv->assoc_id, priv->active_rxon.bssid_addr);
3534
3535         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3536                 return;
3537
3538         if (!priv->vif || !priv->is_open)
3539                 return;
3540
3541         iwl_scan_cancel_timeout(priv, 200);
3542
3543         conf = ieee80211_get_hw_conf(priv->hw);
3544
3545         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3546         iwl3945_commit_rxon(priv);
3547
3548         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3549         iwl3945_setup_rxon_timing(priv);
3550         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3551                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3552         if (rc)
3553                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3554                             "Attempting to continue.\n");
3555
3556         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3557
3558         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3559
3560         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3561                         priv->assoc_id, priv->beacon_int);
3562
3563         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3564                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3565         else
3566                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3567
3568         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3569                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3570                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3571                 else
3572                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3573
3574                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3575                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3576
3577         }
3578
3579         iwl3945_commit_rxon(priv);
3580
3581         switch (priv->iw_mode) {
3582         case NL80211_IFTYPE_STATION:
3583                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3584                 break;
3585
3586         case NL80211_IFTYPE_ADHOC:
3587
3588                 priv->assoc_id = 1;
3589                 iwl3945_add_station(priv, priv->bssid, 0, 0);
3590                 iwl3945_sync_sta(priv, IWL_STA_ID,
3591                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3592                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3593                                  CMD_ASYNC);
3594                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3595                 iwl3945_send_beacon_cmd(priv);
3596
3597                 break;
3598
3599         default:
3600                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3601                            __func__, priv->iw_mode);
3602                 break;
3603         }
3604
3605         iwl_activate_qos(priv, 0);
3606
3607         /* we have just associated, don't start scan too early */
3608         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3609 }
3610
3611 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed);
3612
3613 /*****************************************************************************
3614  *
3615  * mac80211 entry point functions
3616  *
3617  *****************************************************************************/
3618
3619 #define UCODE_READY_TIMEOUT     (2 * HZ)
3620
3621 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3622 {
3623         struct iwl_priv *priv = hw->priv;
3624         int ret;
3625
3626         IWL_DEBUG_MAC80211(priv, "enter\n");
3627
3628         /* we should be verifying the device is ready to be opened */
3629         mutex_lock(&priv->mutex);
3630
3631         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
3632         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3633          * ucode filename and max sizes are card-specific. */
3634
3635         if (!priv->ucode_code.len) {
3636                 ret = iwl3945_read_ucode(priv);
3637                 if (ret) {
3638                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3639                         mutex_unlock(&priv->mutex);
3640                         goto out_release_irq;
3641                 }
3642         }
3643
3644         ret = __iwl3945_up(priv);
3645
3646         mutex_unlock(&priv->mutex);
3647
3648         iwl_rfkill_set_hw_state(priv);
3649
3650         if (ret)
3651                 goto out_release_irq;
3652
3653         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3654
3655         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
3656                 return 0;
3657
3658         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3659          * mac80211 will not be run successfully. */
3660         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3661                         test_bit(STATUS_READY, &priv->status),
3662                         UCODE_READY_TIMEOUT);
3663         if (!ret) {
3664                 if (!test_bit(STATUS_READY, &priv->status)) {
3665                         IWL_ERR(priv,
3666                                 "Wait for START_ALIVE timeout after %dms.\n",
3667                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3668                         ret = -ETIMEDOUT;
3669                         goto out_release_irq;
3670                 }
3671         }
3672
3673         /* ucode is running and will send rfkill notifications,
3674          * no need to poll the killswitch state anymore */
3675         cancel_delayed_work(&priv->rfkill_poll);
3676
3677         priv->is_open = 1;
3678         IWL_DEBUG_MAC80211(priv, "leave\n");
3679         return 0;
3680
3681 out_release_irq:
3682         priv->is_open = 0;
3683         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3684         return ret;
3685 }
3686
3687 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3688 {
3689         struct iwl_priv *priv = hw->priv;
3690
3691         IWL_DEBUG_MAC80211(priv, "enter\n");
3692
3693         if (!priv->is_open) {
3694                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3695                 return;
3696         }
3697
3698         priv->is_open = 0;
3699
3700         if (iwl_is_ready_rf(priv)) {
3701                 /* stop mac, cancel any scan request and clear
3702                  * RXON_FILTER_ASSOC_MSK BIT
3703                  */
3704                 mutex_lock(&priv->mutex);
3705                 iwl_scan_cancel_timeout(priv, 100);
3706                 mutex_unlock(&priv->mutex);
3707         }
3708
3709         iwl3945_down(priv);
3710
3711         flush_workqueue(priv->workqueue);
3712
3713         /* start polling the killswitch state again */
3714         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3715                            round_jiffies_relative(2 * HZ));
3716
3717         IWL_DEBUG_MAC80211(priv, "leave\n");
3718 }
3719
3720 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3721 {
3722         struct iwl_priv *priv = hw->priv;
3723
3724         IWL_DEBUG_MAC80211(priv, "enter\n");
3725
3726         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3727                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3728
3729         if (iwl3945_tx_skb(priv, skb))
3730                 dev_kfree_skb_any(skb);
3731
3732         IWL_DEBUG_MAC80211(priv, "leave\n");
3733         return NETDEV_TX_OK;
3734 }
3735
3736 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
3737                                  struct ieee80211_if_init_conf *conf)
3738 {
3739         struct iwl_priv *priv = hw->priv;
3740         unsigned long flags;
3741
3742         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
3743
3744         if (priv->vif) {
3745                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
3746                 return -EOPNOTSUPP;
3747         }
3748
3749         spin_lock_irqsave(&priv->lock, flags);
3750         priv->vif = conf->vif;
3751         priv->iw_mode = conf->type;
3752
3753         spin_unlock_irqrestore(&priv->lock, flags);
3754
3755         mutex_lock(&priv->mutex);
3756
3757         if (conf->mac_addr) {
3758                 IWL_DEBUG_MAC80211(priv, "Set: %pM\n", conf->mac_addr);
3759                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
3760         }
3761
3762         if (iwl_is_ready(priv))
3763                 iwl3945_set_mode(priv, conf->type);
3764
3765         mutex_unlock(&priv->mutex);
3766
3767         IWL_DEBUG_MAC80211(priv, "leave\n");
3768         return 0;
3769 }
3770
3771 /**
3772  * iwl3945_mac_config - mac80211 config callback
3773  *
3774  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
3775  * be set inappropriately and the driver currently sets the hardware up to
3776  * use it whenever needed.
3777  */
3778 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
3779 {
3780         struct iwl_priv *priv = hw->priv;
3781         const struct iwl_channel_info *ch_info;
3782         struct ieee80211_conf *conf = &hw->conf;
3783         unsigned long flags;
3784         int ret = 0;
3785
3786         mutex_lock(&priv->mutex);
3787         IWL_DEBUG_MAC80211(priv, "enter to channel %d\n",
3788                                 conf->channel->hw_value);
3789
3790         if (!iwl_is_ready(priv)) {
3791                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
3792                 ret = -EIO;
3793                 goto out;
3794         }
3795
3796         if (unlikely(!iwl3945_mod_params.disable_hw_scan &&
3797                      test_bit(STATUS_SCANNING, &priv->status))) {
3798                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
3799                 set_bit(STATUS_CONF_PENDING, &priv->status);
3800                 mutex_unlock(&priv->mutex);
3801                 return 0;
3802         }
3803
3804         spin_lock_irqsave(&priv->lock, flags);
3805
3806         ch_info = iwl_get_channel_info(priv, conf->channel->band,
3807                                        conf->channel->hw_value);
3808         if (!is_channel_valid(ch_info)) {
3809                 IWL_DEBUG_SCAN(priv,
3810                                 "Channel %d [%d] is INVALID for this band.\n",
3811                                 conf->channel->hw_value, conf->channel->band);
3812                 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
3813                 spin_unlock_irqrestore(&priv->lock, flags);
3814                 ret = -EINVAL;
3815                 goto out;
3816         }
3817
3818         iwl_set_rxon_channel(priv, conf->channel);
3819
3820         iwl_set_flags_for_band(priv, conf->channel->band);
3821
3822         /* The list of supported rates and rate mask can be different
3823          * for each phymode; since the phymode may have changed, reset
3824          * the rate mask to what mac80211 lists */
3825         iwl_set_rate(priv);
3826
3827         spin_unlock_irqrestore(&priv->lock, flags);
3828
3829 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
3830         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
3831                 iwl3945_hw_channel_switch(priv, conf->channel);
3832                 goto out;
3833         }
3834 #endif
3835
3836         if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
3837                 if (conf->radio_enabled &&
3838                     iwl_radio_kill_sw_enable_radio(priv)) {
3839                         IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
3840                                                  "waiting for uCode\n");
3841                         goto out;
3842                 }
3843
3844                 if (!conf->radio_enabled) {
3845                         iwl_radio_kill_sw_disable_radio(priv);
3846                         IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
3847                         goto out;
3848                 }
3849         }
3850
3851         if (iwl_is_rfkill(priv)) {
3852                 IWL_DEBUG_MAC80211(priv, "leave - RF kill\n");
3853                 ret = -EIO;
3854                 goto out;
3855         }
3856
3857         iwl_set_rate(priv);
3858
3859         if (memcmp(&priv->active_rxon,
3860                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
3861                 iwl3945_commit_rxon(priv);
3862         else
3863                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration\n");
3864
3865         IWL_DEBUG_MAC80211(priv, "leave\n");
3866
3867 out:
3868         clear_bit(STATUS_CONF_PENDING, &priv->status);
3869         mutex_unlock(&priv->mutex);
3870         return ret;
3871 }
3872
3873 static void iwl3945_config_ap(struct iwl_priv *priv)
3874 {
3875         int rc = 0;
3876
3877         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3878                 return;
3879
3880         /* The following should be done only at AP bring up */
3881         if (!(iwl_is_associated(priv))) {
3882
3883                 /* RXON - unassoc (to set timing command) */
3884                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3885                 iwl3945_commit_rxon(priv);
3886
3887                 /* RXON Timing */
3888                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3889                 iwl3945_setup_rxon_timing(priv);
3890                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3891                                       sizeof(priv->rxon_timing),
3892                                       &priv->rxon_timing);
3893                 if (rc)
3894                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3895                                         "Attempting to continue.\n");
3896
3897                 /* FIXME: what should be the assoc_id for AP? */
3898                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3899                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3900                         priv->staging_rxon.flags |=
3901                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3902                 else
3903                         priv->staging_rxon.flags &=
3904                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3905
3906                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3907                         if (priv->assoc_capability &
3908                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3909                                 priv->staging_rxon.flags |=
3910                                         RXON_FLG_SHORT_SLOT_MSK;
3911                         else
3912                                 priv->staging_rxon.flags &=
3913                                         ~RXON_FLG_SHORT_SLOT_MSK;
3914
3915                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3916                                 priv->staging_rxon.flags &=
3917                                         ~RXON_FLG_SHORT_SLOT_MSK;
3918                 }
3919                 /* restore RXON assoc */
3920                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3921                 iwl3945_commit_rxon(priv);
3922                 iwl3945_add_station(priv, iwl_bcast_addr, 0, 0);
3923         }
3924         iwl3945_send_beacon_cmd(priv);
3925
3926         /* FIXME - we need to add code here to detect a totally new
3927          * configuration, reset the AP, unassoc, rxon timing, assoc,
3928          * clear sta table, add BCAST sta... */
3929 }
3930
3931 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
3932                                         struct ieee80211_vif *vif,
3933                                         struct ieee80211_if_conf *conf)
3934 {
3935         struct iwl_priv *priv = hw->priv;
3936         int rc;
3937
3938         if (conf == NULL)
3939                 return -EIO;
3940
3941         if (priv->vif != vif) {
3942                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
3943                 return 0;
3944         }
3945
3946         /* handle this temporarily here */
3947         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
3948             conf->changed & IEEE80211_IFCC_BEACON) {
3949                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
3950                 if (!beacon)
3951                         return -ENOMEM;
3952                 mutex_lock(&priv->mutex);
3953                 rc = iwl3945_mac_beacon_update(hw, beacon);
3954                 mutex_unlock(&priv->mutex);
3955                 if (rc)
3956                         return rc;
3957         }
3958
3959         if (!iwl_is_alive(priv))
3960                 return -EAGAIN;
3961
3962         mutex_lock(&priv->mutex);
3963
3964         if (conf->bssid)
3965                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
3966
3967 /*
3968  * very dubious code was here; the probe filtering flag is never set:
3969  *
3970         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
3971             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
3972  */
3973
3974         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3975                 if (!conf->bssid) {
3976                         conf->bssid = priv->mac_addr;
3977                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
3978                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
3979                                            conf->bssid);
3980                 }
3981                 if (priv->ibss_beacon)
3982                         dev_kfree_skb(priv->ibss_beacon);
3983
3984                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
3985         }
3986
3987         if (iwl_is_rfkill(priv))
3988                 goto done;
3989
3990         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
3991             !is_multicast_ether_addr(conf->bssid)) {
3992                 /* If there is currently a HW scan going on in the background
3993                  * then we need to cancel it else the RXON below will fail. */
3994                 if (iwl_scan_cancel_timeout(priv, 100)) {
3995                         IWL_WARN(priv, "Aborted scan still in progress "
3996                                     "after 100ms\n");
3997                         IWL_DEBUG_MAC80211(priv, "leaving:scan abort failed\n");
3998                         mutex_unlock(&priv->mutex);
3999                         return -EAGAIN;
4000                 }
4001                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
4002
4003                 /* TODO: Audit driver for usage of these members and see
4004                  * if mac80211 deprecates them (priv->bssid looks like it
4005                  * shouldn't be there, but I haven't scanned the IBSS code
4006                  * to verify) - jpk */
4007                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
4008
4009                 if (priv->iw_mode == NL80211_IFTYPE_AP)
4010                         iwl3945_config_ap(priv);
4011                 else {
4012                         rc = iwl3945_commit_rxon(priv);
4013                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
4014                                 iwl3945_add_station(priv,
4015                                         priv->active_rxon.bssid_addr, 1, 0);
4016                 }
4017
4018         } else {
4019                 iwl_scan_cancel_timeout(priv, 100);
4020                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4021                 iwl3945_commit_rxon(priv);
4022         }
4023
4024  done:
4025         IWL_DEBUG_MAC80211(priv, "leave\n");
4026         mutex_unlock(&priv->mutex);
4027
4028         return 0;
4029 }
4030
4031 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
4032                                      struct ieee80211_if_init_conf *conf)
4033 {
4034         struct iwl_priv *priv = hw->priv;
4035
4036         IWL_DEBUG_MAC80211(priv, "enter\n");
4037
4038         mutex_lock(&priv->mutex);
4039
4040         if (iwl_is_ready_rf(priv)) {
4041                 iwl_scan_cancel_timeout(priv, 100);
4042                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4043                 iwl3945_commit_rxon(priv);
4044         }
4045         if (priv->vif == conf->vif) {
4046                 priv->vif = NULL;
4047                 memset(priv->bssid, 0, ETH_ALEN);
4048         }
4049         mutex_unlock(&priv->mutex);
4050
4051         IWL_DEBUG_MAC80211(priv, "leave\n");
4052 }
4053
4054 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
4055
4056 static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
4057                                      struct ieee80211_vif *vif,
4058                                      struct ieee80211_bss_conf *bss_conf,
4059                                      u32 changes)
4060 {
4061         struct iwl_priv *priv = hw->priv;
4062
4063         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
4064
4065         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
4066                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
4067                                    bss_conf->use_short_preamble);
4068                 if (bss_conf->use_short_preamble)
4069                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4070                 else
4071                         priv->staging_rxon.flags &=
4072                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
4073         }
4074
4075         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
4076                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n",
4077                                    bss_conf->use_cts_prot);
4078                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
4079                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
4080                 else
4081                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
4082         }
4083
4084         if (changes & BSS_CHANGED_ASSOC) {
4085                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
4086                 /* This should never happen as this function should
4087                  * never be called from interrupt context. */
4088                 if (WARN_ON_ONCE(in_interrupt()))
4089                         return;
4090                 if (bss_conf->assoc) {
4091                         priv->assoc_id = bss_conf->aid;
4092                         priv->beacon_int = bss_conf->beacon_int;
4093                         priv->timestamp = bss_conf->timestamp;
4094                         priv->assoc_capability = bss_conf->assoc_capability;
4095                         priv->power_data.dtim_period = bss_conf->dtim_period;
4096                         priv->next_scan_jiffies = jiffies +
4097                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4098                         mutex_lock(&priv->mutex);
4099                         iwl3945_post_associate(priv);
4100                         mutex_unlock(&priv->mutex);
4101                 } else {
4102                         priv->assoc_id = 0;
4103                         IWL_DEBUG_MAC80211(priv,
4104                                         "DISASSOC %d\n", bss_conf->assoc);
4105                 }
4106         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
4107                         IWL_DEBUG_MAC80211(priv,
4108                                         "Associated Changes %d\n", changes);
4109                         iwl3945_send_rxon_assoc(priv);
4110         }
4111
4112 }
4113
4114 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
4115                                struct ieee80211_vif *vif,
4116                                struct ieee80211_sta *sta,
4117                                struct ieee80211_key_conf *key)
4118 {
4119         struct iwl_priv *priv = hw->priv;
4120         const u8 *addr;
4121         int ret = 0;
4122         u8 sta_id = IWL_INVALID_STATION;
4123         u8 static_key;
4124
4125         IWL_DEBUG_MAC80211(priv, "enter\n");
4126
4127         if (iwl3945_mod_params.sw_crypto) {
4128                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
4129                 return -EOPNOTSUPP;
4130         }
4131
4132         addr = sta ? sta->addr : iwl_bcast_addr;
4133         static_key = !iwl_is_associated(priv);
4134
4135         if (!static_key) {
4136                 sta_id = iwl3945_hw_find_station(priv, addr);
4137                 if (sta_id == IWL_INVALID_STATION) {
4138                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
4139                                             addr);
4140                         return -EINVAL;
4141                 }
4142         }
4143
4144         mutex_lock(&priv->mutex);
4145         iwl_scan_cancel_timeout(priv, 100);
4146         mutex_unlock(&priv->mutex);
4147
4148         switch (cmd) {
4149         case SET_KEY:
4150                 if (static_key)
4151                         ret = iwl3945_set_static_key(priv, key);
4152                 else
4153                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
4154                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
4155                 break;
4156         case DISABLE_KEY:
4157                 if (static_key)
4158                         ret = iwl3945_remove_static_key(priv);
4159                 else
4160                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
4161                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
4162                 break;
4163         default:
4164                 ret = -EINVAL;
4165         }
4166
4167         IWL_DEBUG_MAC80211(priv, "leave\n");
4168
4169         return ret;
4170 }
4171
4172 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
4173                            const struct ieee80211_tx_queue_params *params)
4174 {
4175         struct iwl_priv *priv = hw->priv;
4176         unsigned long flags;
4177         int q;
4178
4179         IWL_DEBUG_MAC80211(priv, "enter\n");
4180
4181         if (!iwl_is_ready_rf(priv)) {
4182                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
4183                 return -EIO;
4184         }
4185
4186         if (queue >= AC_NUM) {
4187                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
4188                 return 0;
4189         }
4190
4191         q = AC_NUM - 1 - queue;
4192
4193         spin_lock_irqsave(&priv->lock, flags);
4194
4195         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
4196         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
4197         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4198         priv->qos_data.def_qos_parm.ac[q].edca_txop =
4199                         cpu_to_le16((params->txop * 32));
4200
4201         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4202         priv->qos_data.qos_active = 1;
4203
4204         spin_unlock_irqrestore(&priv->lock, flags);
4205
4206         mutex_lock(&priv->mutex);
4207         if (priv->iw_mode == NL80211_IFTYPE_AP)
4208                 iwl_activate_qos(priv, 1);
4209         else if (priv->assoc_id && iwl_is_associated(priv))
4210                 iwl_activate_qos(priv, 0);
4211
4212         mutex_unlock(&priv->mutex);
4213
4214         IWL_DEBUG_MAC80211(priv, "leave\n");
4215         return 0;
4216 }
4217
4218 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
4219                                 struct ieee80211_tx_queue_stats *stats)
4220 {
4221         struct iwl_priv *priv = hw->priv;
4222         int i, avail;
4223         struct iwl_tx_queue *txq;
4224         struct iwl_queue *q;
4225         unsigned long flags;
4226
4227         IWL_DEBUG_MAC80211(priv, "enter\n");
4228
4229         if (!iwl_is_ready_rf(priv)) {
4230                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
4231                 return -EIO;
4232         }
4233
4234         spin_lock_irqsave(&priv->lock, flags);
4235
4236         for (i = 0; i < AC_NUM; i++) {
4237                 txq = &priv->txq[i];
4238                 q = &txq->q;
4239                 avail = iwl_queue_space(q);
4240
4241                 stats[i].len = q->n_window - avail;
4242                 stats[i].limit = q->n_window - q->high_mark;
4243                 stats[i].count = q->n_window;
4244
4245         }
4246         spin_unlock_irqrestore(&priv->lock, flags);
4247
4248         IWL_DEBUG_MAC80211(priv, "leave\n");
4249
4250         return 0;
4251 }
4252
4253 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
4254 {
4255         struct iwl_priv *priv = hw->priv;
4256         unsigned long flags;
4257
4258         mutex_lock(&priv->mutex);
4259         IWL_DEBUG_MAC80211(priv, "enter\n");
4260
4261         iwl_reset_qos(priv);
4262
4263         spin_lock_irqsave(&priv->lock, flags);
4264         priv->assoc_id = 0;
4265         priv->assoc_capability = 0;
4266
4267         /* new association get rid of ibss beacon skb */
4268         if (priv->ibss_beacon)
4269                 dev_kfree_skb(priv->ibss_beacon);
4270
4271         priv->ibss_beacon = NULL;
4272
4273         priv->beacon_int = priv->hw->conf.beacon_int;
4274         priv->timestamp = 0;
4275         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
4276                 priv->beacon_int = 0;
4277
4278         spin_unlock_irqrestore(&priv->lock, flags);
4279
4280         if (!iwl_is_ready_rf(priv)) {
4281                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
4282                 mutex_unlock(&priv->mutex);
4283                 return;
4284         }
4285
4286         /* we are restarting association process
4287          * clear RXON_FILTER_ASSOC_MSK bit
4288         */
4289         if (priv->iw_mode != NL80211_IFTYPE_AP) {
4290                 iwl_scan_cancel_timeout(priv, 100);
4291                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4292                 iwl3945_commit_rxon(priv);
4293         }
4294
4295         /* Per mac80211.h: This is only used in IBSS mode... */
4296         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
4297
4298                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
4299                 mutex_unlock(&priv->mutex);
4300                 return;
4301         }
4302
4303         iwl_set_rate(priv);
4304
4305         mutex_unlock(&priv->mutex);
4306
4307         IWL_DEBUG_MAC80211(priv, "leave\n");
4308
4309 }
4310
4311 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
4312 {
4313         struct iwl_priv *priv = hw->priv;
4314         unsigned long flags;
4315         __le64 timestamp;
4316
4317         IWL_DEBUG_MAC80211(priv, "enter\n");
4318
4319         if (!iwl_is_ready_rf(priv)) {
4320                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
4321                 return -EIO;
4322         }
4323
4324         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
4325                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
4326                 return -EIO;
4327         }
4328
4329         spin_lock_irqsave(&priv->lock, flags);
4330
4331         if (priv->ibss_beacon)
4332                 dev_kfree_skb(priv->ibss_beacon);
4333
4334         priv->ibss_beacon = skb;
4335
4336         priv->assoc_id = 0;
4337         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
4338         priv->timestamp = le64_to_cpu(timestamp);
4339
4340         IWL_DEBUG_MAC80211(priv, "leave\n");
4341         spin_unlock_irqrestore(&priv->lock, flags);
4342
4343         iwl_reset_qos(priv);
4344
4345         iwl3945_post_associate(priv);
4346
4347
4348         return 0;
4349 }
4350
4351 /*****************************************************************************
4352  *
4353  * sysfs attributes
4354  *
4355  *****************************************************************************/
4356
4357 #ifdef CONFIG_IWLWIFI_DEBUG
4358
4359 /*
4360  * The following adds a new attribute to the sysfs representation
4361  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
4362  * used for controlling the debug level.
4363  *
4364  * See the level definitions in iwl for details.
4365  */
4366 static ssize_t show_debug_level(struct device *d,
4367                                 struct device_attribute *attr, char *buf)
4368 {
4369         struct iwl_priv *priv = d->driver_data;
4370
4371         return sprintf(buf, "0x%08X\n", priv->debug_level);
4372 }
4373 static ssize_t store_debug_level(struct device *d,
4374                                 struct device_attribute *attr,
4375                                  const char *buf, size_t count)
4376 {
4377         struct iwl_priv *priv = d->driver_data;
4378         unsigned long val;
4379         int ret;
4380
4381         ret = strict_strtoul(buf, 0, &val);
4382         if (ret)
4383                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
4384         else
4385                 priv->debug_level = val;
4386
4387         return strnlen(buf, count);
4388 }
4389
4390 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
4391                         show_debug_level, store_debug_level);
4392
4393 #endif /* CONFIG_IWLWIFI_DEBUG */
4394
4395 static ssize_t show_temperature(struct device *d,
4396                                 struct device_attribute *attr, char *buf)
4397 {
4398         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4399
4400         if (!iwl_is_alive(priv))
4401                 return -EAGAIN;
4402
4403         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
4404 }
4405
4406 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
4407
4408 static ssize_t show_tx_power(struct device *d,
4409                              struct device_attribute *attr, char *buf)
4410 {
4411         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4412         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
4413 }
4414
4415 static ssize_t store_tx_power(struct device *d,
4416                               struct device_attribute *attr,
4417                               const char *buf, size_t count)
4418 {
4419         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4420         char *p = (char *)buf;
4421         u32 val;
4422
4423         val = simple_strtoul(p, &p, 10);
4424         if (p == buf)
4425                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
4426         else
4427                 iwl3945_hw_reg_set_txpower(priv, val);
4428
4429         return count;
4430 }
4431
4432 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
4433
4434 static ssize_t show_flags(struct device *d,
4435                           struct device_attribute *attr, char *buf)
4436 {
4437         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4438
4439         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
4440 }
4441
4442 static ssize_t store_flags(struct device *d,
4443                            struct device_attribute *attr,
4444                            const char *buf, size_t count)
4445 {
4446         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4447         u32 flags = simple_strtoul(buf, NULL, 0);
4448
4449         mutex_lock(&priv->mutex);
4450         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
4451                 /* Cancel any currently running scans... */
4452                 if (iwl_scan_cancel_timeout(priv, 100))
4453                         IWL_WARN(priv, "Could not cancel scan.\n");
4454                 else {
4455                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
4456                                        flags);
4457                         priv->staging_rxon.flags = cpu_to_le32(flags);
4458                         iwl3945_commit_rxon(priv);
4459                 }
4460         }
4461         mutex_unlock(&priv->mutex);
4462
4463         return count;
4464 }
4465
4466 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
4467
4468 static ssize_t show_filter_flags(struct device *d,
4469                                  struct device_attribute *attr, char *buf)
4470 {
4471         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4472
4473         return sprintf(buf, "0x%04X\n",
4474                 le32_to_cpu(priv->active_rxon.filter_flags));
4475 }
4476
4477 static ssize_t store_filter_flags(struct device *d,
4478                                   struct device_attribute *attr,
4479                                   const char *buf, size_t count)
4480 {
4481         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4482         u32 filter_flags = simple_strtoul(buf, NULL, 0);
4483
4484         mutex_lock(&priv->mutex);
4485         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
4486                 /* Cancel any currently running scans... */
4487                 if (iwl_scan_cancel_timeout(priv, 100))
4488                         IWL_WARN(priv, "Could not cancel scan.\n");
4489                 else {
4490                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
4491                                        "0x%04X\n", filter_flags);
4492                         priv->staging_rxon.filter_flags =
4493                                 cpu_to_le32(filter_flags);
4494                         iwl3945_commit_rxon(priv);
4495                 }
4496         }
4497         mutex_unlock(&priv->mutex);
4498
4499         return count;
4500 }
4501
4502 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
4503                    store_filter_flags);
4504
4505 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
4506
4507 static ssize_t show_measurement(struct device *d,
4508                                 struct device_attribute *attr, char *buf)
4509 {
4510         struct iwl_priv *priv = dev_get_drvdata(d);
4511         struct iwl_spectrum_notification measure_report;
4512         u32 size = sizeof(measure_report), len = 0, ofs = 0;
4513         u8 *data = (u8 *)&measure_report;
4514         unsigned long flags;
4515
4516         spin_lock_irqsave(&priv->lock, flags);
4517         if (!(priv->measurement_status & MEASUREMENT_READY)) {
4518                 spin_unlock_irqrestore(&priv->lock, flags);
4519                 return 0;
4520         }
4521         memcpy(&measure_report, &priv->measure_report, size);
4522         priv->measurement_status = 0;
4523         spin_unlock_irqrestore(&priv->lock, flags);
4524
4525         while (size && (PAGE_SIZE - len)) {
4526                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
4527                                    PAGE_SIZE - len, 1);
4528                 len = strlen(buf);
4529                 if (PAGE_SIZE - len)
4530                         buf[len++] = '\n';
4531
4532                 ofs += 16;
4533                 size -= min(size, 16U);
4534         }
4535
4536         return len;
4537 }
4538
4539 static ssize_t store_measurement(struct device *d,
4540                                  struct device_attribute *attr,
4541                                  const char *buf, size_t count)
4542 {
4543         struct iwl_priv *priv = dev_get_drvdata(d);
4544         struct ieee80211_measurement_params params = {
4545                 .channel = le16_to_cpu(priv->active_rxon.channel),
4546                 .start_time = cpu_to_le64(priv->last_tsf),
4547                 .duration = cpu_to_le16(1),
4548         };
4549         u8 type = IWL_MEASURE_BASIC;
4550         u8 buffer[32];
4551         u8 channel;
4552
4553         if (count) {
4554                 char *p = buffer;
4555                 strncpy(buffer, buf, min(sizeof(buffer), count));
4556                 channel = simple_strtoul(p, NULL, 0);
4557                 if (channel)
4558                         params.channel = channel;
4559
4560                 p = buffer;
4561                 while (*p && *p != ' ')
4562                         p++;
4563                 if (*p)
4564                         type = simple_strtoul(p + 1, NULL, 0);
4565         }
4566
4567         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
4568                        "channel %d (for '%s')\n", type, params.channel, buf);
4569         iwl3945_get_measurement(priv, &params, type);
4570
4571         return count;
4572 }
4573
4574 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
4575                    show_measurement, store_measurement);
4576 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
4577
4578 static ssize_t store_retry_rate(struct device *d,
4579                                 struct device_attribute *attr,
4580                                 const char *buf, size_t count)
4581 {
4582         struct iwl_priv *priv = dev_get_drvdata(d);
4583
4584         priv->retry_rate = simple_strtoul(buf, NULL, 0);
4585         if (priv->retry_rate <= 0)
4586                 priv->retry_rate = 1;
4587
4588         return count;
4589 }
4590
4591 static ssize_t show_retry_rate(struct device *d,
4592                                struct device_attribute *attr, char *buf)
4593 {
4594         struct iwl_priv *priv = dev_get_drvdata(d);
4595         return sprintf(buf, "%d", priv->retry_rate);
4596 }
4597
4598 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
4599                    store_retry_rate);
4600
4601
4602 static ssize_t store_power_level(struct device *d,
4603                                  struct device_attribute *attr,
4604                                  const char *buf, size_t count)
4605 {
4606         struct iwl_priv *priv = dev_get_drvdata(d);
4607         int ret;
4608         unsigned long mode;
4609
4610
4611         mutex_lock(&priv->mutex);
4612
4613         ret = strict_strtoul(buf, 10, &mode);
4614         if (ret)
4615                 goto out;
4616
4617         ret = iwl_power_set_user_mode(priv, mode);
4618         if (ret) {
4619                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
4620                 goto out;
4621         }
4622         ret = count;
4623
4624  out:
4625         mutex_unlock(&priv->mutex);
4626         return ret;
4627 }
4628
4629 static ssize_t show_power_level(struct device *d,
4630                                 struct device_attribute *attr, char *buf)
4631 {
4632         struct iwl_priv *priv = dev_get_drvdata(d);
4633         int mode = priv->power_data.user_power_setting;
4634         int system = priv->power_data.system_power_setting;
4635         int level = priv->power_data.power_mode;
4636         char *p = buf;
4637
4638         switch (system) {
4639         case IWL_POWER_SYS_AUTO:
4640                 p += sprintf(p, "SYSTEM:auto");
4641                 break;
4642         case IWL_POWER_SYS_AC:
4643                 p += sprintf(p, "SYSTEM:ac");
4644                 break;
4645         case IWL_POWER_SYS_BATTERY:
4646                 p += sprintf(p, "SYSTEM:battery");
4647                 break;
4648         }
4649
4650         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
4651                         "fixed" : "auto");
4652         p += sprintf(p, "\tINDEX:%d", level);
4653         p += sprintf(p, "\n");
4654         return p - buf + 1;
4655 }
4656
4657 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR,
4658                    show_power_level, store_power_level);
4659
4660 #define MAX_WX_STRING 80
4661
4662 /* Values are in microsecond */
4663 static const s32 timeout_duration[] = {
4664         350000,
4665         250000,
4666         75000,
4667         37000,
4668         25000,
4669 };
4670 static const s32 period_duration[] = {
4671         400000,
4672         700000,
4673         1000000,
4674         1000000,
4675         1000000
4676 };
4677
4678 static ssize_t show_channels(struct device *d,
4679                              struct device_attribute *attr, char *buf)
4680 {
4681         /* all this shit doesn't belong into sysfs anyway */
4682         return 0;
4683 }
4684
4685 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
4686
4687 static ssize_t show_statistics(struct device *d,
4688                                struct device_attribute *attr, char *buf)
4689 {
4690         struct iwl_priv *priv = dev_get_drvdata(d);
4691         u32 size = sizeof(struct iwl3945_notif_statistics);
4692         u32 len = 0, ofs = 0;
4693         u8 *data = (u8 *)&priv->statistics_39;
4694         int rc = 0;
4695
4696         if (!iwl_is_alive(priv))
4697                 return -EAGAIN;
4698
4699         mutex_lock(&priv->mutex);
4700         rc = iwl_send_statistics_request(priv, 0);
4701         mutex_unlock(&priv->mutex);
4702
4703         if (rc) {
4704                 len = sprintf(buf,
4705                               "Error sending statistics request: 0x%08X\n", rc);
4706                 return len;
4707         }
4708
4709         while (size && (PAGE_SIZE - len)) {
4710                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
4711                                    PAGE_SIZE - len, 1);
4712                 len = strlen(buf);
4713                 if (PAGE_SIZE - len)
4714                         buf[len++] = '\n';
4715
4716                 ofs += 16;
4717                 size -= min(size, 16U);
4718         }
4719
4720         return len;
4721 }
4722
4723 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
4724
4725 static ssize_t show_antenna(struct device *d,
4726                             struct device_attribute *attr, char *buf)
4727 {
4728         struct iwl_priv *priv = dev_get_drvdata(d);
4729
4730         if (!iwl_is_alive(priv))
4731                 return -EAGAIN;
4732
4733         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
4734 }
4735
4736 static ssize_t store_antenna(struct device *d,
4737                              struct device_attribute *attr,
4738                              const char *buf, size_t count)
4739 {
4740         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
4741         int ant;
4742
4743         if (count == 0)
4744                 return 0;
4745
4746         if (sscanf(buf, "%1i", &ant) != 1) {
4747                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
4748                 return count;
4749         }
4750
4751         if ((ant >= 0) && (ant <= 2)) {
4752                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
4753                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
4754         } else
4755                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
4756
4757
4758         return count;
4759 }
4760
4761 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
4762
4763 static ssize_t show_status(struct device *d,
4764                            struct device_attribute *attr, char *buf)
4765 {
4766         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4767         if (!iwl_is_alive(priv))
4768                 return -EAGAIN;
4769         return sprintf(buf, "0x%08x\n", (int)priv->status);
4770 }
4771
4772 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
4773
4774 static ssize_t dump_error_log(struct device *d,
4775                               struct device_attribute *attr,
4776                               const char *buf, size_t count)
4777 {
4778         char *p = (char *)buf;
4779
4780         if (p[0] == '1')
4781                 iwl3945_dump_nic_error_log((struct iwl_priv *)d->driver_data);
4782
4783         return strnlen(buf, count);
4784 }
4785
4786 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
4787
4788 static ssize_t dump_event_log(struct device *d,
4789                               struct device_attribute *attr,
4790                               const char *buf, size_t count)
4791 {
4792         char *p = (char *)buf;
4793
4794         if (p[0] == '1')
4795                 iwl3945_dump_nic_event_log((struct iwl_priv *)d->driver_data);
4796
4797         return strnlen(buf, count);
4798 }
4799
4800 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
4801
4802 /*****************************************************************************
4803  *
4804  * driver setup and tear down
4805  *
4806  *****************************************************************************/
4807
4808 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
4809 {
4810         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
4811
4812         init_waitqueue_head(&priv->wait_command_queue);
4813
4814         INIT_WORK(&priv->up, iwl3945_bg_up);
4815         INIT_WORK(&priv->restart, iwl3945_bg_restart);
4816         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
4817         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
4818         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
4819         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
4820         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
4821         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
4822         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
4823         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
4824         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
4825         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
4826
4827         iwl3945_hw_setup_deferred_work(priv);
4828
4829         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
4830                      iwl3945_irq_tasklet, (unsigned long)priv);
4831 }
4832
4833 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
4834 {
4835         iwl3945_hw_cancel_deferred_work(priv);
4836
4837         cancel_delayed_work_sync(&priv->init_alive_start);
4838         cancel_delayed_work(&priv->scan_check);
4839         cancel_delayed_work(&priv->alive_start);
4840         cancel_work_sync(&priv->beacon_update);
4841 }
4842
4843 static struct attribute *iwl3945_sysfs_entries[] = {
4844         &dev_attr_antenna.attr,
4845         &dev_attr_channels.attr,
4846         &dev_attr_dump_errors.attr,
4847         &dev_attr_dump_events.attr,
4848         &dev_attr_flags.attr,
4849         &dev_attr_filter_flags.attr,
4850 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
4851         &dev_attr_measurement.attr,
4852 #endif
4853         &dev_attr_power_level.attr,
4854         &dev_attr_retry_rate.attr,
4855         &dev_attr_statistics.attr,
4856         &dev_attr_status.attr,
4857         &dev_attr_temperature.attr,
4858         &dev_attr_tx_power.attr,
4859 #ifdef CONFIG_IWLWIFI_DEBUG
4860         &dev_attr_debug_level.attr,
4861 #endif
4862         NULL
4863 };
4864
4865 static struct attribute_group iwl3945_attribute_group = {
4866         .name = NULL,           /* put in device directory */
4867         .attrs = iwl3945_sysfs_entries,
4868 };
4869
4870 static struct ieee80211_ops iwl3945_hw_ops = {
4871         .tx = iwl3945_mac_tx,
4872         .start = iwl3945_mac_start,
4873         .stop = iwl3945_mac_stop,
4874         .add_interface = iwl3945_mac_add_interface,
4875         .remove_interface = iwl3945_mac_remove_interface,
4876         .config = iwl3945_mac_config,
4877         .config_interface = iwl3945_mac_config_interface,
4878         .configure_filter = iwl_configure_filter,
4879         .set_key = iwl3945_mac_set_key,
4880         .get_tx_stats = iwl3945_mac_get_tx_stats,
4881         .conf_tx = iwl3945_mac_conf_tx,
4882         .reset_tsf = iwl3945_mac_reset_tsf,
4883         .bss_info_changed = iwl3945_bss_info_changed,
4884         .hw_scan = iwl_mac_hw_scan
4885 };
4886
4887 static int iwl3945_init_drv(struct iwl_priv *priv)
4888 {
4889         int ret;
4890         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4891
4892         priv->retry_rate = 1;
4893         priv->ibss_beacon = NULL;
4894
4895         spin_lock_init(&priv->lock);
4896         spin_lock_init(&priv->power_data.lock);
4897         spin_lock_init(&priv->sta_lock);
4898         spin_lock_init(&priv->hcmd_lock);
4899
4900         INIT_LIST_HEAD(&priv->free_frames);
4901
4902         mutex_init(&priv->mutex);
4903
4904         /* Clear the driver's (not device's) station table */
4905         iwl3945_clear_stations_table(priv);
4906
4907         priv->data_retry_limit = -1;
4908         priv->ieee_channels = NULL;
4909         priv->ieee_rates = NULL;
4910         priv->band = IEEE80211_BAND_2GHZ;
4911
4912         priv->iw_mode = NL80211_IFTYPE_STATION;
4913
4914         iwl_reset_qos(priv);
4915
4916         priv->qos_data.qos_active = 0;
4917         priv->qos_data.qos_cap.val = 0;
4918
4919         priv->rates_mask = IWL_RATES_MASK;
4920         /* If power management is turned on, default to CAM mode */
4921         priv->power_mode = IWL_POWER_MODE_CAM;
4922         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
4923
4924         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
4925                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
4926                          eeprom->version);
4927                 ret = -EINVAL;
4928                 goto err;
4929         }
4930         ret = iwl_init_channel_map(priv);
4931         if (ret) {
4932                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
4933                 goto err;
4934         }
4935
4936         /* Set up txpower settings in driver for all channels */
4937         if (iwl3945_txpower_set_from_eeprom(priv)) {
4938                 ret = -EIO;
4939                 goto err_free_channel_map;
4940         }
4941
4942         ret = iwlcore_init_geos(priv);
4943         if (ret) {
4944                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
4945                 goto err_free_channel_map;
4946         }
4947         iwl3945_init_hw_rates(priv, priv->ieee_rates);
4948
4949         return 0;
4950
4951 err_free_channel_map:
4952         iwl_free_channel_map(priv);
4953 err:
4954         return ret;
4955 }
4956
4957 static int iwl3945_setup_mac(struct iwl_priv *priv)
4958 {
4959         int ret;
4960         struct ieee80211_hw *hw = priv->hw;
4961
4962         hw->rate_control_algorithm = "iwl-3945-rs";
4963         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
4964
4965         /* Tell mac80211 our characteristics */
4966         hw->flags = IEEE80211_HW_SIGNAL_DBM |
4967                     IEEE80211_HW_NOISE_DBM |
4968                     IEEE80211_HW_SPECTRUM_MGMT;
4969
4970         hw->wiphy->interface_modes =
4971                 BIT(NL80211_IFTYPE_STATION) |
4972                 BIT(NL80211_IFTYPE_ADHOC);
4973
4974         hw->wiphy->custom_regulatory = true;
4975
4976         hw->wiphy->max_scan_ssids = 1; /* WILL FIX */
4977
4978         /* Default value; 4 EDCA QOS priorities */
4979         hw->queues = 4;
4980
4981         hw->conf.beacon_int = 100;
4982
4983         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4984                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4985                         &priv->bands[IEEE80211_BAND_2GHZ];
4986
4987         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4988                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4989                         &priv->bands[IEEE80211_BAND_5GHZ];
4990
4991         ret = ieee80211_register_hw(priv->hw);
4992         if (ret) {
4993                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
4994                 return ret;
4995         }
4996         priv->mac80211_registered = 1;
4997
4998         return 0;
4999 }
5000
5001 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
5002 {
5003         int err = 0;
5004         struct iwl_priv *priv;
5005         struct ieee80211_hw *hw;
5006         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
5007         struct iwl3945_eeprom *eeprom;
5008         unsigned long flags;
5009
5010         /***********************
5011          * 1. Allocating HW data
5012          * ********************/
5013
5014         /* mac80211 allocates memory for this device instance, including
5015          *   space for this driver's private structure */
5016         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
5017         if (hw == NULL) {
5018                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
5019                 err = -ENOMEM;
5020                 goto out;
5021         }
5022         priv = hw->priv;
5023         SET_IEEE80211_DEV(hw, &pdev->dev);
5024
5025         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
5026              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
5027                 IWL_ERR(priv,
5028                         "invalid queues_num, should be between %d and %d\n",
5029                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
5030                 err = -EINVAL;
5031                 goto out_ieee80211_free_hw;
5032         }
5033
5034         /*
5035          * Disabling hardware scan means that mac80211 will perform scans
5036          * "the hard way", rather than using device's scan.
5037          */
5038         if (iwl3945_mod_params.disable_hw_scan) {
5039                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
5040                 iwl3945_hw_ops.hw_scan = NULL;
5041         }
5042
5043
5044         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
5045         priv->cfg = cfg;
5046         priv->pci_dev = pdev;
5047
5048 #ifdef CONFIG_IWLWIFI_DEBUG
5049         priv->debug_level = iwl3945_mod_params.debug;
5050         atomic_set(&priv->restrict_refcnt, 0);
5051 #endif
5052
5053         /***************************
5054          * 2. Initializing PCI bus
5055          * *************************/
5056         if (pci_enable_device(pdev)) {
5057                 err = -ENODEV;
5058                 goto out_ieee80211_free_hw;
5059         }
5060
5061         pci_set_master(pdev);
5062
5063         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5064         if (!err)
5065                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5066         if (err) {
5067                 IWL_WARN(priv, "No suitable DMA available.\n");
5068                 goto out_pci_disable_device;
5069         }
5070
5071         pci_set_drvdata(pdev, priv);
5072         err = pci_request_regions(pdev, DRV_NAME);
5073         if (err)
5074                 goto out_pci_disable_device;
5075
5076         /***********************
5077          * 3. Read REV Register
5078          * ********************/
5079         priv->hw_base = pci_iomap(pdev, 0, 0);
5080         if (!priv->hw_base) {
5081                 err = -ENODEV;
5082                 goto out_pci_release_regions;
5083         }
5084
5085         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
5086                         (unsigned long long) pci_resource_len(pdev, 0));
5087         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
5088
5089         /* We disable the RETRY_TIMEOUT register (0x41) to keep
5090          * PCI Tx retries from interfering with C3 CPU state */
5091         pci_write_config_byte(pdev, 0x41, 0x00);
5092
5093         /* amp init */
5094         err = priv->cfg->ops->lib->apm_ops.init(priv);
5095         if (err < 0) {
5096                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
5097                 goto out_iounmap;
5098         }
5099
5100         /***********************
5101          * 4. Read EEPROM
5102          * ********************/
5103
5104         /* Read the EEPROM */
5105         err = iwl_eeprom_init(priv);
5106         if (err) {
5107                 IWL_ERR(priv, "Unable to init EEPROM\n");
5108                 goto out_iounmap;
5109         }
5110         /* MAC Address location in EEPROM same for 3945/4965 */
5111         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
5112         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
5113         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
5114         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
5115
5116         /***********************
5117          * 5. Setup HW Constants
5118          * ********************/
5119         /* Device-specific setup */
5120         if (iwl3945_hw_set_hw_params(priv)) {
5121                 IWL_ERR(priv, "failed to set hw settings\n");
5122                 goto out_eeprom_free;
5123         }
5124
5125         /***********************
5126          * 6. Setup priv
5127          * ********************/
5128
5129         err = iwl3945_init_drv(priv);
5130         if (err) {
5131                 IWL_ERR(priv, "initializing driver failed\n");
5132                 goto out_unset_hw_params;
5133         }
5134
5135         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
5136                 priv->cfg->name);
5137
5138         /***********************************
5139          * 7. Initialize Module Parameters
5140          * **********************************/
5141
5142         /* Initialize module parameter values here */
5143         /* Disable radio (SW RF KILL) via parameter when loading driver */
5144         if (iwl3945_mod_params.disable) {
5145                 set_bit(STATUS_RF_KILL_SW, &priv->status);
5146                 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
5147         }
5148
5149
5150         /***********************
5151          * 8. Setup Services
5152          * ********************/
5153
5154         spin_lock_irqsave(&priv->lock, flags);
5155         iwl_disable_interrupts(priv);
5156         spin_unlock_irqrestore(&priv->lock, flags);
5157
5158         pci_enable_msi(priv->pci_dev);
5159
5160         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
5161                           DRV_NAME, priv);
5162         if (err) {
5163                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
5164                 goto out_disable_msi;
5165         }
5166
5167         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
5168         if (err) {
5169                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
5170                 goto out_release_irq;
5171         }
5172
5173         iwl_set_rxon_channel(priv,
5174                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
5175         iwl3945_setup_deferred_work(priv);
5176         iwl3945_setup_rx_handlers(priv);
5177
5178         /*********************************
5179          * 9. Setup and Register mac80211
5180          * *******************************/
5181
5182         iwl_enable_interrupts(priv);
5183
5184         err = iwl3945_setup_mac(priv);
5185         if (err)
5186                 goto  out_remove_sysfs;
5187
5188         err = iwl_rfkill_init(priv);
5189         if (err)
5190                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
5191                                   "Ignoring error: %d\n", err);
5192         else
5193                 iwl_rfkill_set_hw_state(priv);
5194
5195         /* Start monitoring the killswitch */
5196         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
5197                            2 * HZ);
5198
5199         return 0;
5200
5201  out_remove_sysfs:
5202         destroy_workqueue(priv->workqueue);
5203         priv->workqueue = NULL;
5204         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
5205  out_release_irq:
5206         free_irq(priv->pci_dev->irq, priv);
5207  out_disable_msi:
5208         pci_disable_msi(priv->pci_dev);
5209         iwlcore_free_geos(priv);
5210         iwl_free_channel_map(priv);
5211  out_unset_hw_params:
5212         iwl3945_unset_hw_params(priv);
5213  out_eeprom_free:
5214         iwl_eeprom_free(priv);
5215  out_iounmap:
5216         pci_iounmap(pdev, priv->hw_base);
5217  out_pci_release_regions:
5218         pci_release_regions(pdev);
5219  out_pci_disable_device:
5220         pci_set_drvdata(pdev, NULL);
5221         pci_disable_device(pdev);
5222  out_ieee80211_free_hw:
5223         ieee80211_free_hw(priv->hw);
5224  out:
5225         return err;
5226 }
5227
5228 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
5229 {
5230         struct iwl_priv *priv = pci_get_drvdata(pdev);
5231         unsigned long flags;
5232
5233         if (!priv)
5234                 return;
5235
5236         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
5237
5238         set_bit(STATUS_EXIT_PENDING, &priv->status);
5239
5240         if (priv->mac80211_registered) {
5241                 ieee80211_unregister_hw(priv->hw);
5242                 priv->mac80211_registered = 0;
5243         } else {
5244                 iwl3945_down(priv);
5245         }
5246
5247         /* make sure we flush any pending irq or
5248          * tasklet for the driver
5249          */
5250         spin_lock_irqsave(&priv->lock, flags);
5251         iwl_disable_interrupts(priv);
5252         spin_unlock_irqrestore(&priv->lock, flags);
5253
5254         iwl_synchronize_irq(priv);
5255
5256         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
5257
5258         iwl_rfkill_unregister(priv);
5259         cancel_delayed_work_sync(&priv->rfkill_poll);
5260
5261         iwl3945_dealloc_ucode_pci(priv);
5262
5263         if (priv->rxq.bd)
5264                 iwl3945_rx_queue_free(priv, &priv->rxq);
5265         iwl3945_hw_txq_ctx_free(priv);
5266
5267         iwl3945_unset_hw_params(priv);
5268         iwl3945_clear_stations_table(priv);
5269
5270         /*netif_stop_queue(dev); */
5271         flush_workqueue(priv->workqueue);
5272
5273         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
5274          * priv->workqueue... so we can't take down the workqueue
5275          * until now... */
5276         destroy_workqueue(priv->workqueue);
5277         priv->workqueue = NULL;
5278
5279         free_irq(pdev->irq, priv);
5280         pci_disable_msi(pdev);
5281
5282         pci_iounmap(pdev, priv->hw_base);
5283         pci_release_regions(pdev);
5284         pci_disable_device(pdev);
5285         pci_set_drvdata(pdev, NULL);
5286
5287         iwl_free_channel_map(priv);
5288         iwlcore_free_geos(priv);
5289         kfree(priv->scan);
5290         if (priv->ibss_beacon)
5291                 dev_kfree_skb(priv->ibss_beacon);
5292
5293         ieee80211_free_hw(priv->hw);
5294 }
5295
5296 #ifdef CONFIG_PM
5297
5298 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
5299 {
5300         struct iwl_priv *priv = pci_get_drvdata(pdev);
5301
5302         if (priv->is_open) {
5303                 set_bit(STATUS_IN_SUSPEND, &priv->status);
5304                 iwl3945_mac_stop(priv->hw);
5305                 priv->is_open = 1;
5306         }
5307         pci_save_state(pdev);
5308         pci_disable_device(pdev);
5309         pci_set_power_state(pdev, PCI_D3hot);
5310
5311         return 0;
5312 }
5313
5314 static int iwl3945_pci_resume(struct pci_dev *pdev)
5315 {
5316         struct iwl_priv *priv = pci_get_drvdata(pdev);
5317         int ret;
5318
5319         pci_set_power_state(pdev, PCI_D0);
5320         ret = pci_enable_device(pdev);
5321         if (ret)
5322                 return ret;
5323         pci_restore_state(pdev);
5324
5325         if (priv->is_open)
5326                 iwl3945_mac_start(priv->hw);
5327
5328         clear_bit(STATUS_IN_SUSPEND, &priv->status);
5329         return 0;
5330 }
5331
5332 #endif /* CONFIG_PM */
5333
5334 /*****************************************************************************
5335  *
5336  * driver and module entry point
5337  *
5338  *****************************************************************************/
5339
5340 static struct pci_driver iwl3945_driver = {
5341         .name = DRV_NAME,
5342         .id_table = iwl3945_hw_card_ids,
5343         .probe = iwl3945_pci_probe,
5344         .remove = __devexit_p(iwl3945_pci_remove),
5345 #ifdef CONFIG_PM
5346         .suspend = iwl3945_pci_suspend,
5347         .resume = iwl3945_pci_resume,
5348 #endif
5349 };
5350
5351 static int __init iwl3945_init(void)
5352 {
5353
5354         int ret;
5355         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
5356         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
5357
5358         ret = iwl3945_rate_control_register();
5359         if (ret) {
5360                 printk(KERN_ERR DRV_NAME
5361                        "Unable to register rate control algorithm: %d\n", ret);
5362                 return ret;
5363         }
5364
5365         ret = pci_register_driver(&iwl3945_driver);
5366         if (ret) {
5367                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
5368                 goto error_register;
5369         }
5370
5371         return ret;
5372
5373 error_register:
5374         iwl3945_rate_control_unregister();
5375         return ret;
5376 }
5377
5378 static void __exit iwl3945_exit(void)
5379 {
5380         pci_unregister_driver(&iwl3945_driver);
5381         iwl3945_rate_control_unregister();
5382 }
5383
5384 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
5385
5386 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
5387 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
5388 module_param_named(disable, iwl3945_mod_params.disable, int, 0444);
5389 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
5390 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
5391 MODULE_PARM_DESC(swcrypto,
5392                  "using software crypto (default 1 [software])\n");
5393 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
5394 MODULE_PARM_DESC(debug, "debug output mask");
5395 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
5396 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
5397
5398 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
5399 MODULE_PARM_DESC(queues_num, "number of hw queues.");
5400
5401 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
5402 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
5403
5404 module_exit(iwl3945_exit);
5405 module_init(iwl3945_init);