iwl3945: use iwl_led structure
[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[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
489                         == STA_KEY_FLG_NO_ENC)
490                 priv->stations[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[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;
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          * Use the first empty entry in this queue's command buffer array
1079          * to contain the Tx command and MAC header concatenated together
1080          * (payload data will be in another buffer).
1081          * Size of this varies, due to varying MAC header length.
1082          * If end is not dword aligned, we'll have 2 extra bytes at the end
1083          * of the MAC header (device reads on dword boundaries).
1084          * We'll tell device about this padding later.
1085          */
1086         len = sizeof(struct iwl3945_tx_cmd) +
1087                         sizeof(struct iwl_cmd_header) + hdr_len;
1088
1089         len_org = len;
1090         len = (len + 3) & ~3;
1091
1092         if (len_org != len)
1093                 len_org = 1;
1094         else
1095                 len_org = 0;
1096
1097         /* Physical address of this Tx command's header (not MAC header!),
1098          * within command buffer array. */
1099         txcmd_phys = pci_map_single(priv->pci_dev,
1100                                     out_cmd, sizeof(struct iwl_cmd),
1101                                     PCI_DMA_TODEVICE);
1102         pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys);
1103         pci_unmap_len_set(&out_cmd->meta, len, sizeof(struct iwl_cmd));
1104         /* Add buffer containing Tx command and MAC(!) header to TFD's
1105          * first entry */
1106         txcmd_phys += offsetof(struct iwl_cmd, hdr);
1107
1108         /* Add buffer containing Tx command and MAC(!) header to TFD's
1109          * first entry */
1110         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
1111                                                    txcmd_phys, len, 1, 0);
1112
1113         if (info->control.hw_key)
1114                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
1115
1116         /* Set up TFD's 2nd entry to point directly to remainder of skb,
1117          * if any (802.11 null frames have no payload). */
1118         len = skb->len - hdr_len;
1119         if (len) {
1120                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
1121                                            len, PCI_DMA_TODEVICE);
1122                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
1123                                                            phys_addr, len,
1124                                                            0, U32_PAD(len));
1125         }
1126
1127         /* Total # bytes to be transmitted */
1128         len = (u16)skb->len;
1129         tx->len = cpu_to_le16(len);
1130
1131         /* TODO need this for burst mode later on */
1132         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
1133
1134         /* set is_hcca to 0; it probably will never be implemented */
1135         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
1136
1137         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
1138         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
1139
1140         if (!ieee80211_has_morefrags(hdr->frame_control)) {
1141                 txq->need_update = 1;
1142                 if (qc)
1143                         priv->stations_39[sta_id].tid[tid].seq_number = seq_number;
1144         } else {
1145                 wait_write_ptr = 1;
1146                 txq->need_update = 0;
1147         }
1148
1149         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
1150
1151         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
1152                            ieee80211_hdrlen(fc));
1153
1154         /* Tell device the write index *just past* this latest filled TFD */
1155         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
1156         rc = iwl_txq_update_write_ptr(priv, txq);
1157         spin_unlock_irqrestore(&priv->lock, flags);
1158
1159         if (rc)
1160                 return rc;
1161
1162         if ((iwl_queue_space(q) < q->high_mark)
1163             && priv->mac80211_registered) {
1164                 if (wait_write_ptr) {
1165                         spin_lock_irqsave(&priv->lock, flags);
1166                         txq->need_update = 1;
1167                         iwl_txq_update_write_ptr(priv, txq);
1168                         spin_unlock_irqrestore(&priv->lock, flags);
1169                 }
1170
1171                 ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
1172         }
1173
1174         return 0;
1175
1176 drop_unlock:
1177         spin_unlock_irqrestore(&priv->lock, flags);
1178 drop:
1179         return -1;
1180 }
1181
1182 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
1183
1184 #include "iwl-spectrum.h"
1185
1186 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
1187 #define BEACON_TIME_MASK_HIGH   0xFF000000
1188 #define TIME_UNIT               1024
1189
1190 /*
1191  * extended beacon time format
1192  * time in usec will be changed into a 32-bit value in 8:24 format
1193  * the high 1 byte is the beacon counts
1194  * the lower 3 bytes is the time in usec within one beacon interval
1195  */
1196
1197 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
1198 {
1199         u32 quot;
1200         u32 rem;
1201         u32 interval = beacon_interval * 1024;
1202
1203         if (!interval || !usec)
1204                 return 0;
1205
1206         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
1207         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
1208
1209         return (quot << 24) + rem;
1210 }
1211
1212 /* base is usually what we get from ucode with each received frame,
1213  * the same as HW timer counter counting down
1214  */
1215
1216 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
1217 {
1218         u32 base_low = base & BEACON_TIME_MASK_LOW;
1219         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
1220         u32 interval = beacon_interval * TIME_UNIT;
1221         u32 res = (base & BEACON_TIME_MASK_HIGH) +
1222             (addon & BEACON_TIME_MASK_HIGH);
1223
1224         if (base_low > addon_low)
1225                 res += base_low - addon_low;
1226         else if (base_low < addon_low) {
1227                 res += interval + base_low - addon_low;
1228                 res += (1 << 24);
1229         } else
1230                 res += (1 << 24);
1231
1232         return cpu_to_le32(res);
1233 }
1234
1235 static int iwl3945_get_measurement(struct iwl_priv *priv,
1236                                struct ieee80211_measurement_params *params,
1237                                u8 type)
1238 {
1239         struct iwl_spectrum_cmd spectrum;
1240         struct iwl_rx_packet *res;
1241         struct iwl_host_cmd cmd = {
1242                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
1243                 .data = (void *)&spectrum,
1244                 .meta.flags = CMD_WANT_SKB,
1245         };
1246         u32 add_time = le64_to_cpu(params->start_time);
1247         int rc;
1248         int spectrum_resp_status;
1249         int duration = le16_to_cpu(params->duration);
1250
1251         if (iwl_is_associated(priv))
1252                 add_time =
1253                     iwl3945_usecs_to_beacons(
1254                         le64_to_cpu(params->start_time) - priv->last_tsf,
1255                         le16_to_cpu(priv->rxon_timing.beacon_interval));
1256
1257         memset(&spectrum, 0, sizeof(spectrum));
1258
1259         spectrum.channel_count = cpu_to_le16(1);
1260         spectrum.flags =
1261             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
1262         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
1263         cmd.len = sizeof(spectrum);
1264         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
1265
1266         if (iwl_is_associated(priv))
1267                 spectrum.start_time =
1268                     iwl3945_add_beacon_time(priv->last_beacon_time,
1269                                 add_time,
1270                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1271         else
1272                 spectrum.start_time = 0;
1273
1274         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
1275         spectrum.channels[0].channel = params->channel;
1276         spectrum.channels[0].type = type;
1277         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
1278                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
1279                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
1280
1281         rc = iwl_send_cmd_sync(priv, &cmd);
1282         if (rc)
1283                 return rc;
1284
1285         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1286         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1287                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
1288                 rc = -EIO;
1289         }
1290
1291         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
1292         switch (spectrum_resp_status) {
1293         case 0:         /* Command will be handled */
1294                 if (res->u.spectrum.id != 0xff) {
1295                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
1296                                                 res->u.spectrum.id);
1297                         priv->measurement_status &= ~MEASUREMENT_READY;
1298                 }
1299                 priv->measurement_status |= MEASUREMENT_ACTIVE;
1300                 rc = 0;
1301                 break;
1302
1303         case 1:         /* Command will not be handled */
1304                 rc = -EAGAIN;
1305                 break;
1306         }
1307
1308         dev_kfree_skb_any(cmd.meta.u.skb);
1309
1310         return rc;
1311 }
1312 #endif
1313
1314 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
1315                                struct iwl_rx_mem_buffer *rxb)
1316 {
1317         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1318         struct iwl_alive_resp *palive;
1319         struct delayed_work *pwork;
1320
1321         palive = &pkt->u.alive_frame;
1322
1323         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
1324                        "0x%01X 0x%01X\n",
1325                        palive->is_valid, palive->ver_type,
1326                        palive->ver_subtype);
1327
1328         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
1329                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
1330                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
1331                        sizeof(struct iwl_alive_resp));
1332                 pwork = &priv->init_alive_start;
1333         } else {
1334                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1335                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
1336                        sizeof(struct iwl_alive_resp));
1337                 pwork = &priv->alive_start;
1338                 iwl3945_disable_events(priv);
1339         }
1340
1341         /* We delay the ALIVE response by 5ms to
1342          * give the HW RF Kill time to activate... */
1343         if (palive->is_valid == UCODE_VALID_OK)
1344                 queue_delayed_work(priv->workqueue, pwork,
1345                                    msecs_to_jiffies(5));
1346         else
1347                 IWL_WARN(priv, "uCode did not respond OK.\n");
1348 }
1349
1350 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
1351                                  struct iwl_rx_mem_buffer *rxb)
1352 {
1353 #ifdef CONFIG_IWLWIFI_DEBUG
1354         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1355 #endif
1356
1357         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
1358         return;
1359 }
1360
1361 static void iwl3945_bg_beacon_update(struct work_struct *work)
1362 {
1363         struct iwl_priv *priv =
1364                 container_of(work, struct iwl_priv, beacon_update);
1365         struct sk_buff *beacon;
1366
1367         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
1368         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
1369
1370         if (!beacon) {
1371                 IWL_ERR(priv, "update beacon failed\n");
1372                 return;
1373         }
1374
1375         mutex_lock(&priv->mutex);
1376         /* new beacon skb is allocated every time; dispose previous.*/
1377         if (priv->ibss_beacon)
1378                 dev_kfree_skb(priv->ibss_beacon);
1379
1380         priv->ibss_beacon = beacon;
1381         mutex_unlock(&priv->mutex);
1382
1383         iwl3945_send_beacon_cmd(priv);
1384 }
1385
1386 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
1387                                 struct iwl_rx_mem_buffer *rxb)
1388 {
1389 #ifdef CONFIG_IWLWIFI_DEBUG
1390         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1391         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
1392         u8 rate = beacon->beacon_notify_hdr.rate;
1393
1394         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
1395                 "tsf %d %d rate %d\n",
1396                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
1397                 beacon->beacon_notify_hdr.failure_frame,
1398                 le32_to_cpu(beacon->ibss_mgr_status),
1399                 le32_to_cpu(beacon->high_tsf),
1400                 le32_to_cpu(beacon->low_tsf), rate);
1401 #endif
1402
1403         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
1404             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
1405                 queue_work(priv->workqueue, &priv->beacon_update);
1406 }
1407
1408 /* Handle notification from uCode that card's power state is changing
1409  * due to software, hardware, or critical temperature RFKILL */
1410 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
1411                                     struct iwl_rx_mem_buffer *rxb)
1412 {
1413         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1414         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
1415         unsigned long status = priv->status;
1416
1417         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
1418                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1419                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1420
1421         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1422                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1423
1424         if (flags & HW_CARD_DISABLED)
1425                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1426         else
1427                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1428
1429
1430         if (flags & SW_CARD_DISABLED)
1431                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1432         else
1433                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1434
1435         iwl_scan_cancel(priv);
1436
1437         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1438              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1439             (test_bit(STATUS_RF_KILL_SW, &status) !=
1440              test_bit(STATUS_RF_KILL_SW, &priv->status)))
1441                 queue_work(priv->workqueue, &priv->rf_kill);
1442         else
1443                 wake_up_interruptible(&priv->wait_command_queue);
1444 }
1445
1446 /**
1447  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
1448  *
1449  * Setup the RX handlers for each of the reply types sent from the uCode
1450  * to the host.
1451  *
1452  * This function chains into the hardware specific files for them to setup
1453  * any hardware specific handlers as well.
1454  */
1455 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
1456 {
1457         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
1458         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
1459         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
1460         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1461         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1462         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1463             iwl_rx_pm_debug_statistics_notif;
1464         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
1465
1466         /*
1467          * The same handler is used for both the REPLY to a discrete
1468          * statistics request from the host as well as for the periodic
1469          * statistics notifications (after received beacons) from the uCode.
1470          */
1471         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
1472         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
1473
1474         iwl_setup_spectrum_handlers(priv);
1475         iwl_setup_rx_scan_handlers(priv);
1476         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
1477
1478         /* Set up hardware specific Rx handlers */
1479         iwl3945_hw_rx_handler_setup(priv);
1480 }
1481
1482 /**
1483  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
1484  * When FW advances 'R' index, all entries between old and new 'R' index
1485  * need to be reclaimed.
1486  */
1487 static void iwl3945_cmd_queue_reclaim(struct iwl_priv *priv,
1488                                       int txq_id, int index)
1489 {
1490         struct iwl_tx_queue *txq = &priv->txq[txq_id];
1491         struct iwl_queue *q = &txq->q;
1492         int nfreed = 0;
1493
1494         if ((index >= q->n_bd) || (iwl_queue_used(q, index) == 0)) {
1495                 IWL_ERR(priv, "Read index for DMA queue txq id (%d), index %d, "
1496                           "is out of range [0-%d] %d %d.\n", txq_id,
1497                           index, q->n_bd, q->write_ptr, q->read_ptr);
1498                 return;
1499         }
1500
1501         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
1502                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
1503                 if (nfreed > 1) {
1504                         IWL_ERR(priv, "HCMD skipped: index (%d) %d %d\n", index,
1505                                         q->write_ptr, q->read_ptr);
1506                         queue_work(priv->workqueue, &priv->restart);
1507                         break;
1508                 }
1509                 nfreed++;
1510         }
1511 }
1512
1513
1514 /**
1515  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
1516  * @rxb: Rx buffer to reclaim
1517  *
1518  * If an Rx buffer has an async callback associated with it the callback
1519  * will be executed.  The attached skb (if present) will only be freed
1520  * if the callback returns 1
1521  */
1522 static void iwl3945_tx_cmd_complete(struct iwl_priv *priv,
1523                                 struct iwl_rx_mem_buffer *rxb)
1524 {
1525         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1526         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1527         int txq_id = SEQ_TO_QUEUE(sequence);
1528         int index = SEQ_TO_INDEX(sequence);
1529         int huge =  !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
1530         int cmd_index;
1531         struct iwl_cmd *cmd;
1532
1533         if (WARN(txq_id != IWL_CMD_QUEUE_NUM,
1534                  "wrong command queue %d, sequence 0x%X readp=%d writep=%d\n",
1535                   txq_id, sequence,
1536                   priv->txq[IWL_CMD_QUEUE_NUM].q.read_ptr,
1537                   priv->txq[IWL_CMD_QUEUE_NUM].q.write_ptr)) {
1538                 iwl_print_hex_dump(priv, IWL_DL_INFO , rxb, 32);
1539                 return;
1540         }
1541
1542         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
1543         cmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
1544
1545         /* Input error checking is done when commands are added to queue. */
1546         if (cmd->meta.flags & CMD_WANT_SKB) {
1547                 cmd->meta.source->u.skb = rxb->skb;
1548                 rxb->skb = NULL;
1549         } else if (cmd->meta.u.callback &&
1550                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
1551                 rxb->skb = NULL;
1552
1553         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
1554
1555         if (!(cmd->meta.flags & CMD_ASYNC)) {
1556                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1557                 wake_up_interruptible(&priv->wait_command_queue);
1558         }
1559 }
1560
1561 /************************** RX-FUNCTIONS ****************************/
1562 /*
1563  * Rx theory of operation
1564  *
1565  * The host allocates 32 DMA target addresses and passes the host address
1566  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1567  * 0 to 31
1568  *
1569  * Rx Queue Indexes
1570  * The host/firmware share two index registers for managing the Rx buffers.
1571  *
1572  * The READ index maps to the first position that the firmware may be writing
1573  * to -- the driver can read up to (but not including) this position and get
1574  * good data.
1575  * The READ index is managed by the firmware once the card is enabled.
1576  *
1577  * The WRITE index maps to the last position the driver has read from -- the
1578  * position preceding WRITE is the last slot the firmware can place a packet.
1579  *
1580  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1581  * WRITE = READ.
1582  *
1583  * During initialization, the host sets up the READ queue position to the first
1584  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1585  *
1586  * When the firmware places a packet in a buffer, it will advance the READ index
1587  * and fire the RX interrupt.  The driver can then query the READ index and
1588  * process as many packets as possible, moving the WRITE index forward as it
1589  * resets the Rx queue buffers with new memory.
1590  *
1591  * The management in the driver is as follows:
1592  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1593  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1594  *   to replenish the iwl->rxq->rx_free.
1595  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1596  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1597  *   'processed' and 'read' driver indexes as well)
1598  * + A received packet is processed and handed to the kernel network stack,
1599  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1600  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1601  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1602  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1603  *   were enough free buffers and RX_STALLED is set it is cleared.
1604  *
1605  *
1606  * Driver sequence:
1607  *
1608  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1609  *                            iwl3945_rx_queue_restock
1610  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1611  *                            queue, updates firmware pointers, and updates
1612  *                            the WRITE index.  If insufficient rx_free buffers
1613  *                            are available, schedules iwl3945_rx_replenish
1614  *
1615  * -- enable interrupts --
1616  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1617  *                            READ INDEX, detaching the SKB from the pool.
1618  *                            Moves the packet buffer from queue to rx_used.
1619  *                            Calls iwl3945_rx_queue_restock to refill any empty
1620  *                            slots.
1621  * ...
1622  *
1623  */
1624
1625 /**
1626  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1627  */
1628 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1629                                           dma_addr_t dma_addr)
1630 {
1631         return cpu_to_le32((u32)dma_addr);
1632 }
1633
1634 /**
1635  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1636  *
1637  * If there are slots in the RX queue that need to be restocked,
1638  * and we have free pre-allocated buffers, fill the ranks as much
1639  * as we can, pulling from rx_free.
1640  *
1641  * This moves the 'write' index forward to catch up with 'processed', and
1642  * also updates the memory address in the firmware to reference the new
1643  * target buffer.
1644  */
1645 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1646 {
1647         struct iwl_rx_queue *rxq = &priv->rxq;
1648         struct list_head *element;
1649         struct iwl_rx_mem_buffer *rxb;
1650         unsigned long flags;
1651         int write, rc;
1652
1653         spin_lock_irqsave(&rxq->lock, flags);
1654         write = rxq->write & ~0x7;
1655         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1656                 /* Get next free Rx buffer, remove from free list */
1657                 element = rxq->rx_free.next;
1658                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1659                 list_del(element);
1660
1661                 /* Point to Rx buffer via next RBD in circular buffer */
1662                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1663                 rxq->queue[rxq->write] = rxb;
1664                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1665                 rxq->free_count--;
1666         }
1667         spin_unlock_irqrestore(&rxq->lock, flags);
1668         /* If the pre-allocated buffer pool is dropping low, schedule to
1669          * refill it */
1670         if (rxq->free_count <= RX_LOW_WATERMARK)
1671                 queue_work(priv->workqueue, &priv->rx_replenish);
1672
1673
1674         /* If we've added more space for the firmware to place data, tell it.
1675          * Increment device's write pointer in multiples of 8. */
1676         if ((write != (rxq->write & ~0x7))
1677             || (abs(rxq->write - rxq->read) > 7)) {
1678                 spin_lock_irqsave(&rxq->lock, flags);
1679                 rxq->need_update = 1;
1680                 spin_unlock_irqrestore(&rxq->lock, flags);
1681                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1682                 if (rc)
1683                         return rc;
1684         }
1685
1686         return 0;
1687 }
1688
1689 /**
1690  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1691  *
1692  * When moving to rx_free an SKB is allocated for the slot.
1693  *
1694  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1695  * This is called as a scheduled work item (except for during initialization)
1696  */
1697 static void iwl3945_rx_allocate(struct iwl_priv *priv)
1698 {
1699         struct iwl_rx_queue *rxq = &priv->rxq;
1700         struct list_head *element;
1701         struct iwl_rx_mem_buffer *rxb;
1702         unsigned long flags;
1703         spin_lock_irqsave(&rxq->lock, flags);
1704         while (!list_empty(&rxq->rx_used)) {
1705                 element = rxq->rx_used.next;
1706                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1707
1708                 /* Alloc a new receive buffer */
1709                 rxb->skb =
1710                     alloc_skb(priv->hw_params.rx_buf_size,
1711                                 __GFP_NOWARN | GFP_ATOMIC);
1712                 if (!rxb->skb) {
1713                         if (net_ratelimit())
1714                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1715                         /* We don't reschedule replenish work here -- we will
1716                          * call the restock method and if it still needs
1717                          * more buffers it will schedule replenish */
1718                         break;
1719                 }
1720
1721                 /* If radiotap head is required, reserve some headroom here.
1722                  * The physical head count is a variable rx_stats->phy_count.
1723                  * We reserve 4 bytes here. Plus these extra bytes, the
1724                  * headroom of the physical head should be enough for the
1725                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1726                  */
1727                 skb_reserve(rxb->skb, 4);
1728
1729                 priv->alloc_rxb_skb++;
1730                 list_del(element);
1731
1732                 /* Get physical address of RB/SKB */
1733                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1734                                                 rxb->skb->data,
1735                                                 priv->hw_params.rx_buf_size,
1736                                                 PCI_DMA_FROMDEVICE);
1737                 list_add_tail(&rxb->list, &rxq->rx_free);
1738                 rxq->free_count++;
1739         }
1740         spin_unlock_irqrestore(&rxq->lock, flags);
1741 }
1742
1743 /*
1744  * this should be called while priv->lock is locked
1745  */
1746 static void __iwl3945_rx_replenish(void *data)
1747 {
1748         struct iwl_priv *priv = data;
1749
1750         iwl3945_rx_allocate(priv);
1751         iwl3945_rx_queue_restock(priv);
1752 }
1753
1754
1755 void iwl3945_rx_replenish(void *data)
1756 {
1757         struct iwl_priv *priv = data;
1758         unsigned long flags;
1759
1760         iwl3945_rx_allocate(priv);
1761
1762         spin_lock_irqsave(&priv->lock, flags);
1763         iwl3945_rx_queue_restock(priv);
1764         spin_unlock_irqrestore(&priv->lock, flags);
1765 }
1766
1767 /* Convert linear signal-to-noise ratio into dB */
1768 static u8 ratio2dB[100] = {
1769 /*       0   1   2   3   4   5   6   7   8   9 */
1770          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1771         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1772         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1773         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1774         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1775         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1776         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1777         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1778         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1779         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1780 };
1781
1782 /* Calculates a relative dB value from a ratio of linear
1783  *   (i.e. not dB) signal levels.
1784  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1785 int iwl3945_calc_db_from_ratio(int sig_ratio)
1786 {
1787         /* 1000:1 or higher just report as 60 dB */
1788         if (sig_ratio >= 1000)
1789                 return 60;
1790
1791         /* 100:1 or higher, divide by 10 and use table,
1792          *   add 20 dB to make up for divide by 10 */
1793         if (sig_ratio >= 100)
1794                 return 20 + (int)ratio2dB[sig_ratio/10];
1795
1796         /* We shouldn't see this */
1797         if (sig_ratio < 1)
1798                 return 0;
1799
1800         /* Use table for ratios 1:1 - 99:1 */
1801         return (int)ratio2dB[sig_ratio];
1802 }
1803
1804 #define PERFECT_RSSI (-20) /* dBm */
1805 #define WORST_RSSI (-95)   /* dBm */
1806 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1807
1808 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1809  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1810  *   about formulas used below. */
1811 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1812 {
1813         int sig_qual;
1814         int degradation = PERFECT_RSSI - rssi_dbm;
1815
1816         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1817          * as indicator; formula is (signal dbm - noise dbm).
1818          * SNR at or above 40 is a great signal (100%).
1819          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1820          * Weakest usable signal is usually 10 - 15 dB SNR. */
1821         if (noise_dbm) {
1822                 if (rssi_dbm - noise_dbm >= 40)
1823                         return 100;
1824                 else if (rssi_dbm < noise_dbm)
1825                         return 0;
1826                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1827
1828         /* Else use just the signal level.
1829          * This formula is a least squares fit of data points collected and
1830          *   compared with a reference system that had a percentage (%) display
1831          *   for signal quality. */
1832         } else
1833                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1834                             (15 * RSSI_RANGE + 62 * degradation)) /
1835                            (RSSI_RANGE * RSSI_RANGE);
1836
1837         if (sig_qual > 100)
1838                 sig_qual = 100;
1839         else if (sig_qual < 1)
1840                 sig_qual = 0;
1841
1842         return sig_qual;
1843 }
1844
1845 /**
1846  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1847  *
1848  * Uses the priv->rx_handlers callback function array to invoke
1849  * the appropriate handlers, including command responses,
1850  * frame-received notifications, and other notifications.
1851  */
1852 static void iwl3945_rx_handle(struct iwl_priv *priv)
1853 {
1854         struct iwl_rx_mem_buffer *rxb;
1855         struct iwl_rx_packet *pkt;
1856         struct iwl_rx_queue *rxq = &priv->rxq;
1857         u32 r, i;
1858         int reclaim;
1859         unsigned long flags;
1860         u8 fill_rx = 0;
1861         u32 count = 8;
1862
1863         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1864          * buffer that the driver may process (last buffer filled by ucode). */
1865         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1866         i = rxq->read;
1867
1868         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1869                 fill_rx = 1;
1870         /* Rx interrupt, but nothing sent from uCode */
1871         if (i == r)
1872                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1873
1874         while (i != r) {
1875                 rxb = rxq->queue[i];
1876
1877                 /* If an RXB doesn't have a Rx queue slot associated with it,
1878                  * then a bug has been introduced in the queue refilling
1879                  * routines -- catch it here */
1880                 BUG_ON(rxb == NULL);
1881
1882                 rxq->queue[i] = NULL;
1883
1884                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->real_dma_addr,
1885                                             priv->hw_params.rx_buf_size,
1886                                             PCI_DMA_FROMDEVICE);
1887                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1888
1889                 /* Reclaim a command buffer only if this packet is a response
1890                  *   to a (driver-originated) command.
1891                  * If the packet (e.g. Rx frame) originated from uCode,
1892                  *   there is no command buffer to reclaim.
1893                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1894                  *   but apparently a few don't get set; catch them here. */
1895                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1896                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1897                         (pkt->hdr.cmd != REPLY_TX);
1898
1899                 /* Based on type of command response or notification,
1900                  *   handle those that need handling via function in
1901                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1902                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1903                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1904                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1905                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1906                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1907                 } else {
1908                         /* No handling needed */
1909                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1910                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1911                                 r, i, get_cmd_string(pkt->hdr.cmd),
1912                                 pkt->hdr.cmd);
1913                 }
1914
1915                 if (reclaim) {
1916                         /* Invoke any callbacks, transfer the skb to caller, and
1917                          * fire off the (possibly) blocking iwl_send_cmd()
1918                          * as we reclaim the driver command queue */
1919                         if (rxb && rxb->skb)
1920                                 iwl3945_tx_cmd_complete(priv, rxb);
1921                         else
1922                                 IWL_WARN(priv, "Claim null rxb?\n");
1923                 }
1924
1925                 /* For now we just don't re-use anything.  We can tweak this
1926                  * later to try and re-use notification packets and SKBs that
1927                  * fail to Rx correctly */
1928                 if (rxb->skb != NULL) {
1929                         priv->alloc_rxb_skb--;
1930                         dev_kfree_skb_any(rxb->skb);
1931                         rxb->skb = NULL;
1932                 }
1933
1934                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1935                                 priv->hw_params.rx_buf_size,
1936                                 PCI_DMA_FROMDEVICE);
1937                 spin_lock_irqsave(&rxq->lock, flags);
1938                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1939                 spin_unlock_irqrestore(&rxq->lock, flags);
1940                 i = (i + 1) & RX_QUEUE_MASK;
1941                 /* If there are a lot of unused frames,
1942                  * restock the Rx queue so ucode won't assert. */
1943                 if (fill_rx) {
1944                         count++;
1945                         if (count >= 8) {
1946                                 priv->rxq.read = i;
1947                                 __iwl3945_rx_replenish(priv);
1948                                 count = 0;
1949                         }
1950                 }
1951         }
1952
1953         /* Backtrack one entry */
1954         priv->rxq.read = i;
1955         iwl3945_rx_queue_restock(priv);
1956 }
1957
1958 /* call this function to flush any scheduled tasklet */
1959 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1960 {
1961         /* wait to make sure we flush pending tasklet*/
1962         synchronize_irq(priv->pci_dev->irq);
1963         tasklet_kill(&priv->irq_tasklet);
1964 }
1965
1966 static const char *desc_lookup(int i)
1967 {
1968         switch (i) {
1969         case 1:
1970                 return "FAIL";
1971         case 2:
1972                 return "BAD_PARAM";
1973         case 3:
1974                 return "BAD_CHECKSUM";
1975         case 4:
1976                 return "NMI_INTERRUPT";
1977         case 5:
1978                 return "SYSASSERT";
1979         case 6:
1980                 return "FATAL_ERROR";
1981         }
1982
1983         return "UNKNOWN";
1984 }
1985
1986 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1987 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1988
1989 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1990 {
1991         u32 i;
1992         u32 desc, time, count, base, data1;
1993         u32 blink1, blink2, ilink1, ilink2;
1994         int rc;
1995
1996         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1997
1998         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1999                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
2000                 return;
2001         }
2002
2003         rc = iwl_grab_nic_access(priv);
2004         if (rc) {
2005                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
2006                 return;
2007         }
2008
2009         count = iwl_read_targ_mem(priv, base);
2010
2011         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
2012                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
2013                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
2014                         priv->status, count);
2015         }
2016
2017         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
2018                   "ilink1  nmiPC   Line\n");
2019         for (i = ERROR_START_OFFSET;
2020              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
2021              i += ERROR_ELEM_SIZE) {
2022                 desc = iwl_read_targ_mem(priv, base + i);
2023                 time =
2024                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
2025                 blink1 =
2026                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
2027                 blink2 =
2028                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
2029                 ilink1 =
2030                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
2031                 ilink2 =
2032                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
2033                 data1 =
2034                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
2035
2036                 IWL_ERR(priv,
2037                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
2038                         desc_lookup(desc), desc, time, blink1, blink2,
2039                         ilink1, ilink2, data1);
2040         }
2041
2042         iwl_release_nic_access(priv);
2043
2044 }
2045
2046 #define EVENT_START_OFFSET  (6 * sizeof(u32))
2047
2048 /**
2049  * iwl3945_print_event_log - Dump error event log to syslog
2050  *
2051  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
2052  */
2053 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
2054                                 u32 num_events, u32 mode)
2055 {
2056         u32 i;
2057         u32 base;       /* SRAM byte address of event log header */
2058         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
2059         u32 ptr;        /* SRAM byte address of log data */
2060         u32 ev, time, data; /* event log data */
2061
2062         if (num_events == 0)
2063                 return;
2064
2065         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2066
2067         if (mode == 0)
2068                 event_size = 2 * sizeof(u32);
2069         else
2070                 event_size = 3 * sizeof(u32);
2071
2072         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
2073
2074         /* "time" is actually "data" for mode 0 (no timestamp).
2075          * place event id # at far right for easier visual parsing. */
2076         for (i = 0; i < num_events; i++) {
2077                 ev = iwl_read_targ_mem(priv, ptr);
2078                 ptr += sizeof(u32);
2079                 time = iwl_read_targ_mem(priv, ptr);
2080                 ptr += sizeof(u32);
2081                 if (mode == 0) {
2082                         /* data, ev */
2083                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
2084                 } else {
2085                         data = iwl_read_targ_mem(priv, ptr);
2086                         ptr += sizeof(u32);
2087                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
2088                 }
2089         }
2090 }
2091
2092 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
2093 {
2094         int rc;
2095         u32 base;       /* SRAM byte address of event log header */
2096         u32 capacity;   /* event log capacity in # entries */
2097         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
2098         u32 num_wraps;  /* # times uCode wrapped to top of log */
2099         u32 next_entry; /* index of next entry to be written by uCode */
2100         u32 size;       /* # entries that we'll print */
2101
2102         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2103         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
2104                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
2105                 return;
2106         }
2107
2108         rc = iwl_grab_nic_access(priv);
2109         if (rc) {
2110                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
2111                 return;
2112         }
2113
2114         /* event log header */
2115         capacity = iwl_read_targ_mem(priv, base);
2116         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
2117         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
2118         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
2119
2120         size = num_wraps ? capacity : next_entry;
2121
2122         /* bail out if nothing in log */
2123         if (size == 0) {
2124                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2125                 iwl_release_nic_access(priv);
2126                 return;
2127         }
2128
2129         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
2130                   size, num_wraps);
2131
2132         /* if uCode has wrapped back to top of log, start at the oldest entry,
2133          * i.e the next one that uCode would fill. */
2134         if (num_wraps)
2135                 iwl3945_print_event_log(priv, next_entry,
2136                                     capacity - next_entry, mode);
2137
2138         /* (then/else) start at top of log */
2139         iwl3945_print_event_log(priv, 0, next_entry, mode);
2140
2141         iwl_release_nic_access(priv);
2142 }
2143
2144 static void iwl3945_error_recovery(struct iwl_priv *priv)
2145 {
2146         unsigned long flags;
2147
2148         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
2149                sizeof(priv->staging_rxon));
2150         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2151         iwl3945_commit_rxon(priv);
2152
2153         iwl3945_add_station(priv, priv->bssid, 1, 0);
2154
2155         spin_lock_irqsave(&priv->lock, flags);
2156         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
2157         priv->error_recovering = 0;
2158         spin_unlock_irqrestore(&priv->lock, flags);
2159 }
2160
2161 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
2162 {
2163         u32 inta, handled = 0;
2164         u32 inta_fh;
2165         unsigned long flags;
2166 #ifdef CONFIG_IWLWIFI_DEBUG
2167         u32 inta_mask;
2168 #endif
2169
2170         spin_lock_irqsave(&priv->lock, flags);
2171
2172         /* Ack/clear/reset pending uCode interrupts.
2173          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
2174          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
2175         inta = iwl_read32(priv, CSR_INT);
2176         iwl_write32(priv, CSR_INT, inta);
2177
2178         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
2179          * Any new interrupts that happen after this, either while we're
2180          * in this tasklet, or later, will show up in next ISR/tasklet. */
2181         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2182         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
2183
2184 #ifdef CONFIG_IWLWIFI_DEBUG
2185         if (priv->debug_level & IWL_DL_ISR) {
2186                 /* just for debug */
2187                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2188                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2189                               inta, inta_mask, inta_fh);
2190         }
2191 #endif
2192
2193         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
2194          * atomic, make sure that inta covers all the interrupts that
2195          * we've discovered, even if FH interrupt came in just after
2196          * reading CSR_INT. */
2197         if (inta_fh & CSR39_FH_INT_RX_MASK)
2198                 inta |= CSR_INT_BIT_FH_RX;
2199         if (inta_fh & CSR39_FH_INT_TX_MASK)
2200                 inta |= CSR_INT_BIT_FH_TX;
2201
2202         /* Now service all interrupt bits discovered above. */
2203         if (inta & CSR_INT_BIT_HW_ERR) {
2204                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
2205
2206                 /* Tell the device to stop sending interrupts */
2207                 iwl_disable_interrupts(priv);
2208
2209                 iwl_irq_handle_error(priv);
2210
2211                 handled |= CSR_INT_BIT_HW_ERR;
2212
2213                 spin_unlock_irqrestore(&priv->lock, flags);
2214
2215                 return;
2216         }
2217
2218 #ifdef CONFIG_IWLWIFI_DEBUG
2219         if (priv->debug_level & (IWL_DL_ISR)) {
2220                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
2221                 if (inta & CSR_INT_BIT_SCD)
2222                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
2223                                       "the frame/frames.\n");
2224
2225                 /* Alive notification via Rx interrupt will do the real work */
2226                 if (inta & CSR_INT_BIT_ALIVE)
2227                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
2228         }
2229 #endif
2230         /* Safely ignore these bits for debug checks below */
2231         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
2232
2233         /* Error detected by uCode */
2234         if (inta & CSR_INT_BIT_SW_ERR) {
2235                 IWL_ERR(priv, "Microcode SW error detected. "
2236                         "Restarting 0x%X.\n", inta);
2237                 iwl_irq_handle_error(priv);
2238                 handled |= CSR_INT_BIT_SW_ERR;
2239         }
2240
2241         /* uCode wakes up after power-down sleep */
2242         if (inta & CSR_INT_BIT_WAKEUP) {
2243                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
2244                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
2245                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
2246                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
2247                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
2248                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
2249                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
2250                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
2251
2252                 handled |= CSR_INT_BIT_WAKEUP;
2253         }
2254
2255         /* All uCode command responses, including Tx command responses,
2256          * Rx "responses" (frame-received notification), and other
2257          * notifications from uCode come through here*/
2258         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
2259                 iwl3945_rx_handle(priv);
2260                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
2261         }
2262
2263         if (inta & CSR_INT_BIT_FH_TX) {
2264                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
2265
2266                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
2267                 if (!iwl_grab_nic_access(priv)) {
2268                         iwl_write_direct32(priv, FH39_TCSR_CREDIT
2269                                              (FH39_SRVC_CHNL), 0x0);
2270                         iwl_release_nic_access(priv);
2271                 }
2272                 handled |= CSR_INT_BIT_FH_TX;
2273         }
2274
2275         if (inta & ~handled)
2276                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
2277
2278         if (inta & ~CSR_INI_SET_MASK) {
2279                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
2280                          inta & ~CSR_INI_SET_MASK);
2281                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
2282         }
2283
2284         /* Re-enable all interrupts */
2285         /* only Re-enable if disabled by irq */
2286         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2287                 iwl_enable_interrupts(priv);
2288
2289 #ifdef CONFIG_IWLWIFI_DEBUG
2290         if (priv->debug_level & (IWL_DL_ISR)) {
2291                 inta = iwl_read32(priv, CSR_INT);
2292                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2293                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2294                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
2295                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
2296         }
2297 #endif
2298         spin_unlock_irqrestore(&priv->lock, flags);
2299 }
2300
2301 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
2302                                          enum ieee80211_band band,
2303                                      u8 is_active, u8 n_probes,
2304                                      struct iwl3945_scan_channel *scan_ch)
2305 {
2306         const struct ieee80211_channel *channels = NULL;
2307         const struct ieee80211_supported_band *sband;
2308         const struct iwl_channel_info *ch_info;
2309         u16 passive_dwell = 0;
2310         u16 active_dwell = 0;
2311         int added, i;
2312
2313         sband = iwl_get_hw_mode(priv, band);
2314         if (!sband)
2315                 return 0;
2316
2317         channels = sband->channels;
2318
2319         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
2320         passive_dwell = iwl_get_passive_dwell_time(priv, band);
2321
2322         if (passive_dwell <= active_dwell)
2323                 passive_dwell = active_dwell + 1;
2324
2325         for (i = 0, added = 0; i < sband->n_channels; i++) {
2326                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
2327                         continue;
2328
2329                 scan_ch->channel = channels[i].hw_value;
2330
2331                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
2332                 if (!is_channel_valid(ch_info)) {
2333                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
2334                                        scan_ch->channel);
2335                         continue;
2336                 }
2337
2338                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
2339                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
2340                 /* If passive , set up for auto-switch
2341                  *  and use long active_dwell time.
2342                  */
2343                 if (!is_active || is_channel_passive(ch_info) ||
2344                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
2345                         scan_ch->type = 0;      /* passive */
2346                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
2347                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
2348                 } else {
2349                         scan_ch->type = 1;      /* active */
2350                 }
2351
2352                 /* Set direct probe bits. These may be used both for active
2353                  * scan channels (probes gets sent right away),
2354                  * or for passive channels (probes get se sent only after
2355                  * hearing clear Rx packet).*/
2356                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
2357                         if (n_probes)
2358                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2359                 } else {
2360                         /* uCode v1 does not allow setting direct probe bits on
2361                          * passive channel. */
2362                         if ((scan_ch->type & 1) && n_probes)
2363                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2364                 }
2365
2366                 /* Set txpower levels to defaults */
2367                 scan_ch->tpc.dsp_atten = 110;
2368                 /* scan_pwr_info->tpc.dsp_atten; */
2369
2370                 /*scan_pwr_info->tpc.tx_gain; */
2371                 if (band == IEEE80211_BAND_5GHZ)
2372                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
2373                 else {
2374                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
2375                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
2376                          * power level:
2377                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
2378                          */
2379                 }
2380
2381                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
2382                                scan_ch->channel,
2383                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
2384                                (scan_ch->type & 1) ?
2385                                active_dwell : passive_dwell);
2386
2387                 scan_ch++;
2388                 added++;
2389         }
2390
2391         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
2392         return added;
2393 }
2394
2395 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
2396                               struct ieee80211_rate *rates)
2397 {
2398         int i;
2399
2400         for (i = 0; i < IWL_RATE_COUNT; i++) {
2401                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
2402                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
2403                 rates[i].hw_value_short = i;
2404                 rates[i].flags = 0;
2405                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
2406                         /*
2407                          * If CCK != 1M then set short preamble rate flag.
2408                          */
2409                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
2410                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
2411                 }
2412         }
2413 }
2414
2415 /******************************************************************************
2416  *
2417  * uCode download functions
2418  *
2419  ******************************************************************************/
2420
2421 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
2422 {
2423         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2424         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2425         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2426         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2427         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2428         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2429 }
2430
2431 /**
2432  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2433  *     looking at all data.
2434  */
2435 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2436 {
2437         u32 val;
2438         u32 save_len = len;
2439         int rc = 0;
2440         u32 errcnt;
2441
2442         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2443
2444         rc = iwl_grab_nic_access(priv);
2445         if (rc)
2446                 return rc;
2447
2448         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2449                                IWL39_RTC_INST_LOWER_BOUND);
2450
2451         errcnt = 0;
2452         for (; len > 0; len -= sizeof(u32), image++) {
2453                 /* read data comes through single port, auto-incr addr */
2454                 /* NOTE: Use the debugless read so we don't flood kernel log
2455                  * if IWL_DL_IO is set */
2456                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2457                 if (val != le32_to_cpu(*image)) {
2458                         IWL_ERR(priv, "uCode INST section is invalid at "
2459                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2460                                   save_len - len, val, le32_to_cpu(*image));
2461                         rc = -EIO;
2462                         errcnt++;
2463                         if (errcnt >= 20)
2464                                 break;
2465                 }
2466         }
2467
2468         iwl_release_nic_access(priv);
2469
2470         if (!errcnt)
2471                 IWL_DEBUG_INFO(priv,
2472                         "ucode image in INSTRUCTION memory is good\n");
2473
2474         return rc;
2475 }
2476
2477
2478 /**
2479  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2480  *   using sample data 100 bytes apart.  If these sample points are good,
2481  *   it's a pretty good bet that everything between them is good, too.
2482  */
2483 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2484 {
2485         u32 val;
2486         int rc = 0;
2487         u32 errcnt = 0;
2488         u32 i;
2489
2490         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2491
2492         rc = iwl_grab_nic_access(priv);
2493         if (rc)
2494                 return rc;
2495
2496         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2497                 /* read data comes through single port, auto-incr addr */
2498                 /* NOTE: Use the debugless read so we don't flood kernel log
2499                  * if IWL_DL_IO is set */
2500                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2501                         i + IWL39_RTC_INST_LOWER_BOUND);
2502                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2503                 if (val != le32_to_cpu(*image)) {
2504 #if 0 /* Enable this if you want to see details */
2505                         IWL_ERR(priv, "uCode INST section is invalid at "
2506                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2507                                   i, val, *image);
2508 #endif
2509                         rc = -EIO;
2510                         errcnt++;
2511                         if (errcnt >= 3)
2512                                 break;
2513                 }
2514         }
2515
2516         iwl_release_nic_access(priv);
2517
2518         return rc;
2519 }
2520
2521
2522 /**
2523  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2524  *    and verify its contents
2525  */
2526 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2527 {
2528         __le32 *image;
2529         u32 len;
2530         int rc = 0;
2531
2532         /* Try bootstrap */
2533         image = (__le32 *)priv->ucode_boot.v_addr;
2534         len = priv->ucode_boot.len;
2535         rc = iwl3945_verify_inst_sparse(priv, image, len);
2536         if (rc == 0) {
2537                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2538                 return 0;
2539         }
2540
2541         /* Try initialize */
2542         image = (__le32 *)priv->ucode_init.v_addr;
2543         len = priv->ucode_init.len;
2544         rc = iwl3945_verify_inst_sparse(priv, image, len);
2545         if (rc == 0) {
2546                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2547                 return 0;
2548         }
2549
2550         /* Try runtime/protocol */
2551         image = (__le32 *)priv->ucode_code.v_addr;
2552         len = priv->ucode_code.len;
2553         rc = iwl3945_verify_inst_sparse(priv, image, len);
2554         if (rc == 0) {
2555                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2556                 return 0;
2557         }
2558
2559         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2560
2561         /* Since nothing seems to match, show first several data entries in
2562          * instruction SRAM, so maybe visual inspection will give a clue.
2563          * Selection of bootstrap image (vs. other images) is arbitrary. */
2564         image = (__le32 *)priv->ucode_boot.v_addr;
2565         len = priv->ucode_boot.len;
2566         rc = iwl3945_verify_inst_full(priv, image, len);
2567
2568         return rc;
2569 }
2570
2571 static void iwl3945_nic_start(struct iwl_priv *priv)
2572 {
2573         /* Remove all resets to allow NIC to operate */
2574         iwl_write32(priv, CSR_RESET, 0);
2575 }
2576
2577 /**
2578  * iwl3945_read_ucode - Read uCode images from disk file.
2579  *
2580  * Copy into buffers for card to fetch via bus-mastering
2581  */
2582 static int iwl3945_read_ucode(struct iwl_priv *priv)
2583 {
2584         struct iwl_ucode *ucode;
2585         int ret = -EINVAL, index;
2586         const struct firmware *ucode_raw;
2587         /* firmware file name contains uCode/driver compatibility version */
2588         const char *name_pre = priv->cfg->fw_name_pre;
2589         const unsigned int api_max = priv->cfg->ucode_api_max;
2590         const unsigned int api_min = priv->cfg->ucode_api_min;
2591         char buf[25];
2592         u8 *src;
2593         size_t len;
2594         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2595
2596         /* Ask kernel firmware_class module to get the boot firmware off disk.
2597          * request_firmware() is synchronous, file is in memory on return. */
2598         for (index = api_max; index >= api_min; index--) {
2599                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2600                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2601                 if (ret < 0) {
2602                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2603                                   buf, ret);
2604                         if (ret == -ENOENT)
2605                                 continue;
2606                         else
2607                                 goto error;
2608                 } else {
2609                         if (index < api_max)
2610                                 IWL_ERR(priv, "Loaded firmware %s, "
2611                                         "which is deprecated. "
2612                                         " Please use API v%u instead.\n",
2613                                           buf, api_max);
2614                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2615                                        "(%zd bytes) from disk\n",
2616                                        buf, ucode_raw->size);
2617                         break;
2618                 }
2619         }
2620
2621         if (ret < 0)
2622                 goto error;
2623
2624         /* Make sure that we got at least our header! */
2625         if (ucode_raw->size < sizeof(*ucode)) {
2626                 IWL_ERR(priv, "File size way too small!\n");
2627                 ret = -EINVAL;
2628                 goto err_release;
2629         }
2630
2631         /* Data from ucode file:  header followed by uCode images */
2632         ucode = (void *)ucode_raw->data;
2633
2634         priv->ucode_ver = le32_to_cpu(ucode->ver);
2635         api_ver = IWL_UCODE_API(priv->ucode_ver);
2636         inst_size = le32_to_cpu(ucode->inst_size);
2637         data_size = le32_to_cpu(ucode->data_size);
2638         init_size = le32_to_cpu(ucode->init_size);
2639         init_data_size = le32_to_cpu(ucode->init_data_size);
2640         boot_size = le32_to_cpu(ucode->boot_size);
2641
2642         /* api_ver should match the api version forming part of the
2643          * firmware filename ... but we don't check for that and only rely
2644          * on the API version read from firware header from here on forward */
2645
2646         if (api_ver < api_min || api_ver > api_max) {
2647                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2648                           "Driver supports v%u, firmware is v%u.\n",
2649                           api_max, api_ver);
2650                 priv->ucode_ver = 0;
2651                 ret = -EINVAL;
2652                 goto err_release;
2653         }
2654         if (api_ver != api_max)
2655                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2656                           "got %u. New firmware can be obtained "
2657                           "from http://www.intellinuxwireless.org.\n",
2658                           api_max, api_ver);
2659
2660         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2661                 IWL_UCODE_MAJOR(priv->ucode_ver),
2662                 IWL_UCODE_MINOR(priv->ucode_ver),
2663                 IWL_UCODE_API(priv->ucode_ver),
2664                 IWL_UCODE_SERIAL(priv->ucode_ver));
2665
2666         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2667                        priv->ucode_ver);
2668         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2669                        inst_size);
2670         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2671                        data_size);
2672         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2673                        init_size);
2674         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2675                        init_data_size);
2676         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2677                        boot_size);
2678
2679
2680         /* Verify size of file vs. image size info in file's header */
2681         if (ucode_raw->size < sizeof(*ucode) +
2682                 inst_size + data_size + init_size +
2683                 init_data_size + boot_size) {
2684
2685                 IWL_DEBUG_INFO(priv, "uCode file size %zd too small\n",
2686                                ucode_raw->size);
2687                 ret = -EINVAL;
2688                 goto err_release;
2689         }
2690
2691         /* Verify that uCode images will fit in card's SRAM */
2692         if (inst_size > IWL39_MAX_INST_SIZE) {
2693                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2694                                inst_size);
2695                 ret = -EINVAL;
2696                 goto err_release;
2697         }
2698
2699         if (data_size > IWL39_MAX_DATA_SIZE) {
2700                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2701                                data_size);
2702                 ret = -EINVAL;
2703                 goto err_release;
2704         }
2705         if (init_size > IWL39_MAX_INST_SIZE) {
2706                 IWL_DEBUG_INFO(priv,
2707                                 "uCode init instr len %d too large to fit in\n",
2708                                 init_size);
2709                 ret = -EINVAL;
2710                 goto err_release;
2711         }
2712         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2713                 IWL_DEBUG_INFO(priv,
2714                                 "uCode init data len %d too large to fit in\n",
2715                                 init_data_size);
2716                 ret = -EINVAL;
2717                 goto err_release;
2718         }
2719         if (boot_size > IWL39_MAX_BSM_SIZE) {
2720                 IWL_DEBUG_INFO(priv,
2721                                 "uCode boot instr len %d too large to fit in\n",
2722                                 boot_size);
2723                 ret = -EINVAL;
2724                 goto err_release;
2725         }
2726
2727         /* Allocate ucode buffers for card's bus-master loading ... */
2728
2729         /* Runtime instructions and 2 copies of data:
2730          * 1) unmodified from disk
2731          * 2) backup cache for save/restore during power-downs */
2732         priv->ucode_code.len = inst_size;
2733         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2734
2735         priv->ucode_data.len = data_size;
2736         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2737
2738         priv->ucode_data_backup.len = data_size;
2739         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2740
2741         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2742             !priv->ucode_data_backup.v_addr)
2743                 goto err_pci_alloc;
2744
2745         /* Initialization instructions and data */
2746         if (init_size && init_data_size) {
2747                 priv->ucode_init.len = init_size;
2748                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2749
2750                 priv->ucode_init_data.len = init_data_size;
2751                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2752
2753                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2754                         goto err_pci_alloc;
2755         }
2756
2757         /* Bootstrap (instructions only, no data) */
2758         if (boot_size) {
2759                 priv->ucode_boot.len = boot_size;
2760                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2761
2762                 if (!priv->ucode_boot.v_addr)
2763                         goto err_pci_alloc;
2764         }
2765
2766         /* Copy images into buffers for card's bus-master reads ... */
2767
2768         /* Runtime instructions (first block of data in file) */
2769         src = &ucode->data[0];
2770         len = priv->ucode_code.len;
2771         IWL_DEBUG_INFO(priv,
2772                 "Copying (but not loading) uCode instr len %zd\n", len);
2773         memcpy(priv->ucode_code.v_addr, src, len);
2774         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2775                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2776
2777         /* Runtime data (2nd block)
2778          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2779         src = &ucode->data[inst_size];
2780         len = priv->ucode_data.len;
2781         IWL_DEBUG_INFO(priv,
2782                 "Copying (but not loading) uCode data len %zd\n", len);
2783         memcpy(priv->ucode_data.v_addr, src, len);
2784         memcpy(priv->ucode_data_backup.v_addr, src, len);
2785
2786         /* Initialization instructions (3rd block) */
2787         if (init_size) {
2788                 src = &ucode->data[inst_size + data_size];
2789                 len = priv->ucode_init.len;
2790                 IWL_DEBUG_INFO(priv,
2791                         "Copying (but not loading) init instr len %zd\n", len);
2792                 memcpy(priv->ucode_init.v_addr, src, len);
2793         }
2794
2795         /* Initialization data (4th block) */
2796         if (init_data_size) {
2797                 src = &ucode->data[inst_size + data_size + init_size];
2798                 len = priv->ucode_init_data.len;
2799                 IWL_DEBUG_INFO(priv,
2800                         "Copying (but not loading) init data len %zd\n", len);
2801                 memcpy(priv->ucode_init_data.v_addr, src, len);
2802         }
2803
2804         /* Bootstrap instructions (5th block) */
2805         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
2806         len = priv->ucode_boot.len;
2807         IWL_DEBUG_INFO(priv,
2808                 "Copying (but not loading) boot instr len %zd\n", len);
2809         memcpy(priv->ucode_boot.v_addr, src, len);
2810
2811         /* We have our copies now, allow OS release its copies */
2812         release_firmware(ucode_raw);
2813         return 0;
2814
2815  err_pci_alloc:
2816         IWL_ERR(priv, "failed to allocate pci memory\n");
2817         ret = -ENOMEM;
2818         iwl3945_dealloc_ucode_pci(priv);
2819
2820  err_release:
2821         release_firmware(ucode_raw);
2822
2823  error:
2824         return ret;
2825 }
2826
2827
2828 /**
2829  * iwl3945_set_ucode_ptrs - Set uCode address location
2830  *
2831  * Tell initialization uCode where to find runtime uCode.
2832  *
2833  * BSM registers initially contain pointers to initialization uCode.
2834  * We need to replace them to load runtime uCode inst and data,
2835  * and to save runtime data when powering down.
2836  */
2837 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2838 {
2839         dma_addr_t pinst;
2840         dma_addr_t pdata;
2841         int rc = 0;
2842         unsigned long flags;
2843
2844         /* bits 31:0 for 3945 */
2845         pinst = priv->ucode_code.p_addr;
2846         pdata = priv->ucode_data_backup.p_addr;
2847
2848         spin_lock_irqsave(&priv->lock, flags);
2849         rc = iwl_grab_nic_access(priv);
2850         if (rc) {
2851                 spin_unlock_irqrestore(&priv->lock, flags);
2852                 return rc;
2853         }
2854
2855         /* Tell bootstrap uCode where to find image to load */
2856         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2857         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2858         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2859                                  priv->ucode_data.len);
2860
2861         /* Inst byte count must be last to set up, bit 31 signals uCode
2862          *   that all new ptr/size info is in place */
2863         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2864                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2865
2866         iwl_release_nic_access(priv);
2867
2868         spin_unlock_irqrestore(&priv->lock, flags);
2869
2870         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2871
2872         return rc;
2873 }
2874
2875 /**
2876  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2877  *
2878  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2879  *
2880  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2881  */
2882 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2883 {
2884         /* Check alive response for "valid" sign from uCode */
2885         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2886                 /* We had an error bringing up the hardware, so take it
2887                  * all the way back down so we can try again */
2888                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2889                 goto restart;
2890         }
2891
2892         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2893          * This is a paranoid check, because we would not have gotten the
2894          * "initialize" alive if code weren't properly loaded.  */
2895         if (iwl3945_verify_ucode(priv)) {
2896                 /* Runtime instruction load was bad;
2897                  * take it all the way back down so we can try again */
2898                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2899                 goto restart;
2900         }
2901
2902         /* Send pointers to protocol/runtime uCode image ... init code will
2903          * load and launch runtime uCode, which will send us another "Alive"
2904          * notification. */
2905         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2906         if (iwl3945_set_ucode_ptrs(priv)) {
2907                 /* Runtime instruction load won't happen;
2908                  * take it all the way back down so we can try again */
2909                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2910                 goto restart;
2911         }
2912         return;
2913
2914  restart:
2915         queue_work(priv->workqueue, &priv->restart);
2916 }
2917
2918
2919 /* temporary */
2920 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw,
2921                                      struct sk_buff *skb);
2922
2923 /**
2924  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2925  *                   from protocol/runtime uCode (initialization uCode's
2926  *                   Alive gets handled by iwl3945_init_alive_start()).
2927  */
2928 static void iwl3945_alive_start(struct iwl_priv *priv)
2929 {
2930         int rc = 0;
2931         int thermal_spin = 0;
2932         u32 rfkill;
2933
2934         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2935
2936         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2937                 /* We had an error bringing up the hardware, so take it
2938                  * all the way back down so we can try again */
2939                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2940                 goto restart;
2941         }
2942
2943         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2944          * This is a paranoid check, because we would not have gotten the
2945          * "runtime" alive if code weren't properly loaded.  */
2946         if (iwl3945_verify_ucode(priv)) {
2947                 /* Runtime instruction load was bad;
2948                  * take it all the way back down so we can try again */
2949                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2950                 goto restart;
2951         }
2952
2953         iwl3945_clear_stations_table(priv);
2954
2955         rc = iwl_grab_nic_access(priv);
2956         if (rc) {
2957                 IWL_WARN(priv, "Can not read RFKILL status from adapter\n");
2958                 return;
2959         }
2960
2961         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2962         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2963         iwl_release_nic_access(priv);
2964
2965         if (rfkill & 0x1) {
2966                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2967                 /* if RFKILL is not on, then wait for thermal
2968                  * sensor in adapter to kick in */
2969                 while (iwl3945_hw_get_temperature(priv) == 0) {
2970                         thermal_spin++;
2971                         udelay(10);
2972                 }
2973
2974                 if (thermal_spin)
2975                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2976                                        thermal_spin * 10);
2977         } else
2978                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2979
2980         /* After the ALIVE response, we can send commands to 3945 uCode */
2981         set_bit(STATUS_ALIVE, &priv->status);
2982
2983         /* Clear out the uCode error bit if it is set */
2984         clear_bit(STATUS_FW_ERROR, &priv->status);
2985
2986         if (iwl_is_rfkill(priv))
2987                 return;
2988
2989         ieee80211_wake_queues(priv->hw);
2990
2991         priv->active_rate = priv->rates_mask;
2992         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2993
2994         iwl_power_update_mode(priv, false);
2995
2996         if (iwl_is_associated(priv)) {
2997                 struct iwl3945_rxon_cmd *active_rxon =
2998                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2999
3000                 memcpy(&priv->staging_rxon, &priv->active_rxon,
3001                        sizeof(priv->staging_rxon));
3002                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3003         } else {
3004                 /* Initialize our rx_config data */
3005                 iwl_connection_init_rx_config(priv, priv->iw_mode);
3006         }
3007
3008         /* Configure Bluetooth device coexistence support */
3009         iwl_send_bt_config(priv);
3010
3011         /* Configure the adapter for unassociated operation */
3012         iwl3945_commit_rxon(priv);
3013
3014         iwl3945_reg_txpower_periodic(priv);
3015
3016         iwl3945_led_register(priv);
3017
3018         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
3019         set_bit(STATUS_READY, &priv->status);
3020         wake_up_interruptible(&priv->wait_command_queue);
3021
3022         if (priv->error_recovering)
3023                 iwl3945_error_recovery(priv);
3024
3025         /* reassociate for ADHOC mode */
3026         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
3027                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
3028                                                                 priv->vif);
3029                 if (beacon)
3030                         iwl3945_mac_beacon_update(priv->hw, beacon);
3031         }
3032
3033         return;
3034
3035  restart:
3036         queue_work(priv->workqueue, &priv->restart);
3037 }
3038
3039 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
3040
3041 static void __iwl3945_down(struct iwl_priv *priv)
3042 {
3043         unsigned long flags;
3044         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
3045         struct ieee80211_conf *conf = NULL;
3046
3047         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
3048
3049         conf = ieee80211_get_hw_conf(priv->hw);
3050
3051         if (!exit_pending)
3052                 set_bit(STATUS_EXIT_PENDING, &priv->status);
3053
3054         iwl3945_led_unregister(priv);
3055         iwl3945_clear_stations_table(priv);
3056
3057         /* Unblock any waiting calls */
3058         wake_up_interruptible_all(&priv->wait_command_queue);
3059
3060         /* Wipe out the EXIT_PENDING status bit if we are not actually
3061          * exiting the module */
3062         if (!exit_pending)
3063                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
3064
3065         /* stop and reset the on-board processor */
3066         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3067
3068         /* tell the device to stop sending interrupts */
3069         spin_lock_irqsave(&priv->lock, flags);
3070         iwl_disable_interrupts(priv);
3071         spin_unlock_irqrestore(&priv->lock, flags);
3072         iwl_synchronize_irq(priv);
3073
3074         if (priv->mac80211_registered)
3075                 ieee80211_stop_queues(priv->hw);
3076
3077         /* If we have not previously called iwl3945_init() then
3078          * clear all bits but the RF Kill and SUSPEND bits and return */
3079         if (!iwl_is_init(priv)) {
3080                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
3081                                         STATUS_RF_KILL_HW |
3082                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
3083                                         STATUS_RF_KILL_SW |
3084                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
3085                                         STATUS_GEO_CONFIGURED |
3086                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
3087                                         STATUS_IN_SUSPEND |
3088                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
3089                                         STATUS_EXIT_PENDING;
3090                 goto exit;
3091         }
3092
3093         /* ...otherwise clear out all the status bits but the RF Kill and
3094          * SUSPEND bits and continue taking the NIC down. */
3095         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
3096                                 STATUS_RF_KILL_HW |
3097                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
3098                                 STATUS_RF_KILL_SW |
3099                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
3100                                 STATUS_GEO_CONFIGURED |
3101                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
3102                                 STATUS_IN_SUSPEND |
3103                         test_bit(STATUS_FW_ERROR, &priv->status) <<
3104                                 STATUS_FW_ERROR |
3105                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
3106                                 STATUS_EXIT_PENDING;
3107
3108         priv->cfg->ops->lib->apm_ops.reset(priv);
3109         spin_lock_irqsave(&priv->lock, flags);
3110         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3111         spin_unlock_irqrestore(&priv->lock, flags);
3112
3113         iwl3945_hw_txq_ctx_stop(priv);
3114         iwl3945_hw_rxq_stop(priv);
3115
3116         spin_lock_irqsave(&priv->lock, flags);
3117         if (!iwl_grab_nic_access(priv)) {
3118                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
3119                                          APMG_CLK_VAL_DMA_CLK_RQT);
3120                 iwl_release_nic_access(priv);
3121         }
3122         spin_unlock_irqrestore(&priv->lock, flags);
3123
3124         udelay(5);
3125
3126         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
3127                 priv->cfg->ops->lib->apm_ops.stop(priv);
3128         else
3129                 priv->cfg->ops->lib->apm_ops.reset(priv);
3130
3131  exit:
3132         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
3133
3134         if (priv->ibss_beacon)
3135                 dev_kfree_skb(priv->ibss_beacon);
3136         priv->ibss_beacon = NULL;
3137
3138         /* clear out any free frames */
3139         iwl3945_clear_free_frames(priv);
3140 }
3141
3142 static void iwl3945_down(struct iwl_priv *priv)
3143 {
3144         mutex_lock(&priv->mutex);
3145         __iwl3945_down(priv);
3146         mutex_unlock(&priv->mutex);
3147
3148         iwl3945_cancel_deferred_work(priv);
3149 }
3150
3151 #define MAX_HW_RESTARTS 5
3152
3153 static int __iwl3945_up(struct iwl_priv *priv)
3154 {
3155         int rc, i;
3156
3157         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3158                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
3159                 return -EIO;
3160         }
3161
3162         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
3163                 IWL_WARN(priv, "Radio disabled by SW RF kill (module "
3164                             "parameter)\n");
3165                 return -ENODEV;
3166         }
3167
3168         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
3169                 IWL_ERR(priv, "ucode not available for device bring up\n");
3170                 return -EIO;
3171         }
3172
3173         /* If platform's RF_KILL switch is NOT set to KILL */
3174         if (iwl_read32(priv, CSR_GP_CNTRL) &
3175                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3176                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3177         else {
3178                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3179                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
3180                         IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
3181                         return -ENODEV;
3182                 }
3183         }
3184
3185         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
3186
3187         rc = iwl3945_hw_nic_init(priv);
3188         if (rc) {
3189                 IWL_ERR(priv, "Unable to int nic\n");
3190                 return rc;
3191         }
3192
3193         /* make sure rfkill handshake bits are cleared */
3194         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3195         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3196                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3197
3198         /* clear (again), then enable host interrupts */
3199         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
3200         iwl_enable_interrupts(priv);
3201
3202         /* really make sure rfkill handshake bits are cleared */
3203         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3204         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3205
3206         /* Copy original ucode data image from disk into backup cache.
3207          * This will be used to initialize the on-board processor's
3208          * data SRAM for a clean start when the runtime program first loads. */
3209         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
3210                priv->ucode_data.len);
3211
3212         /* We return success when we resume from suspend and rf_kill is on. */
3213         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
3214                 return 0;
3215
3216         for (i = 0; i < MAX_HW_RESTARTS; i++) {
3217
3218                 iwl3945_clear_stations_table(priv);
3219
3220                 /* load bootstrap state machine,
3221                  * load bootstrap program into processor's memory,
3222                  * prepare to load the "initialize" uCode */
3223                 priv->cfg->ops->lib->load_ucode(priv);
3224
3225                 if (rc) {
3226                         IWL_ERR(priv,
3227                                 "Unable to set up bootstrap uCode: %d\n", rc);
3228                         continue;
3229                 }
3230
3231                 /* start card; "initialize" will load runtime ucode */
3232                 iwl3945_nic_start(priv);
3233
3234                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
3235
3236                 return 0;
3237         }
3238
3239         set_bit(STATUS_EXIT_PENDING, &priv->status);
3240         __iwl3945_down(priv);
3241         clear_bit(STATUS_EXIT_PENDING, &priv->status);
3242
3243         /* tried to restart and config the device for as long as our
3244          * patience could withstand */
3245         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
3246         return -EIO;
3247 }
3248
3249
3250 /*****************************************************************************
3251  *
3252  * Workqueue callbacks
3253  *
3254  *****************************************************************************/
3255
3256 static void iwl3945_bg_init_alive_start(struct work_struct *data)
3257 {
3258         struct iwl_priv *priv =
3259             container_of(data, struct iwl_priv, init_alive_start.work);
3260
3261         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3262                 return;
3263
3264         mutex_lock(&priv->mutex);
3265         iwl3945_init_alive_start(priv);
3266         mutex_unlock(&priv->mutex);
3267 }
3268
3269 static void iwl3945_bg_alive_start(struct work_struct *data)
3270 {
3271         struct iwl_priv *priv =
3272             container_of(data, struct iwl_priv, alive_start.work);
3273
3274         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3275                 return;
3276
3277         mutex_lock(&priv->mutex);
3278         iwl3945_alive_start(priv);
3279         mutex_unlock(&priv->mutex);
3280 }
3281
3282 static void iwl3945_rfkill_poll(struct work_struct *data)
3283 {
3284         struct iwl_priv *priv =
3285             container_of(data, struct iwl_priv, rfkill_poll.work);
3286         unsigned long status = priv->status;
3287
3288         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3289                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3290         else
3291                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3292
3293         if (test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))
3294                 queue_work(priv->workqueue, &priv->rf_kill);
3295
3296         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3297                            round_jiffies_relative(2 * HZ));
3298
3299 }
3300
3301 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
3302 static void iwl3945_bg_request_scan(struct work_struct *data)
3303 {
3304         struct iwl_priv *priv =
3305             container_of(data, struct iwl_priv, request_scan);
3306         struct iwl_host_cmd cmd = {
3307                 .id = REPLY_SCAN_CMD,
3308                 .len = sizeof(struct iwl3945_scan_cmd),
3309                 .meta.flags = CMD_SIZE_HUGE,
3310         };
3311         int rc = 0;
3312         struct iwl3945_scan_cmd *scan;
3313         struct ieee80211_conf *conf = NULL;
3314         u8 n_probes = 2;
3315         enum ieee80211_band band;
3316         DECLARE_SSID_BUF(ssid);
3317
3318         conf = ieee80211_get_hw_conf(priv->hw);
3319
3320         mutex_lock(&priv->mutex);
3321
3322         if (!iwl_is_ready(priv)) {
3323                 IWL_WARN(priv, "request scan called when driver not ready.\n");
3324                 goto done;
3325         }
3326
3327         /* Make sure the scan wasn't canceled before this queued work
3328          * was given the chance to run... */
3329         if (!test_bit(STATUS_SCANNING, &priv->status))
3330                 goto done;
3331
3332         /* This should never be called or scheduled if there is currently
3333          * a scan active in the hardware. */
3334         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
3335                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
3336                                 "Ignoring second request.\n");
3337                 rc = -EIO;
3338                 goto done;
3339         }
3340
3341         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3342                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
3343                 goto done;
3344         }
3345
3346         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3347                 IWL_DEBUG_HC(priv,
3348                         "Scan request while abort pending. Queuing.\n");
3349                 goto done;
3350         }
3351
3352         if (iwl_is_rfkill(priv)) {
3353                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
3354                 goto done;
3355         }
3356
3357         if (!test_bit(STATUS_READY, &priv->status)) {
3358                 IWL_DEBUG_HC(priv,
3359                         "Scan request while uninitialized. Queuing.\n");
3360                 goto done;
3361         }
3362
3363         if (!priv->scan_bands) {
3364                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
3365                 goto done;
3366         }
3367
3368         if (!priv->scan) {
3369                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
3370                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
3371                 if (!priv->scan) {
3372                         rc = -ENOMEM;
3373                         goto done;
3374                 }
3375         }
3376         scan = priv->scan;
3377         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
3378
3379         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
3380         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
3381
3382         if (iwl_is_associated(priv)) {
3383                 u16 interval = 0;
3384                 u32 extra;
3385                 u32 suspend_time = 100;
3386                 u32 scan_suspend_time = 100;
3387                 unsigned long flags;
3388
3389                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
3390
3391                 spin_lock_irqsave(&priv->lock, flags);
3392                 interval = priv->beacon_int;
3393                 spin_unlock_irqrestore(&priv->lock, flags);
3394
3395                 scan->suspend_time = 0;
3396                 scan->max_out_time = cpu_to_le32(200 * 1024);
3397                 if (!interval)
3398                         interval = suspend_time;
3399                 /*
3400                  * suspend time format:
3401                  *  0-19: beacon interval in usec (time before exec.)
3402                  * 20-23: 0
3403                  * 24-31: number of beacons (suspend between channels)
3404                  */
3405
3406                 extra = (suspend_time / interval) << 24;
3407                 scan_suspend_time = 0xFF0FFFFF &
3408                     (extra | ((suspend_time % interval) * 1024));
3409
3410                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
3411                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
3412                                scan_suspend_time, interval);
3413         }
3414
3415         /* We should add the ability for user to lock to PASSIVE ONLY */
3416         if (priv->one_direct_scan) {
3417                 IWL_DEBUG_SCAN(priv, "Kicking off one direct scan for '%s'\n",
3418                                 print_ssid(ssid, priv->direct_ssid,
3419                                 priv->direct_ssid_len));
3420                 scan->direct_scan[0].id = WLAN_EID_SSID;
3421                 scan->direct_scan[0].len = priv->direct_ssid_len;
3422                 memcpy(scan->direct_scan[0].ssid,
3423                        priv->direct_ssid, priv->direct_ssid_len);
3424                 n_probes++;
3425         } else
3426                 IWL_DEBUG_SCAN(priv, "Kicking off one indirect scan.\n");
3427
3428         /* We don't build a direct scan probe request; the uCode will do
3429          * that based on the direct_mask added to each channel entry */
3430         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
3431         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
3432         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3433
3434         /* flags + rate selection */
3435
3436         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
3437                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
3438                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
3439                 scan->good_CRC_th = 0;
3440                 band = IEEE80211_BAND_2GHZ;
3441         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
3442                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
3443                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
3444                 band = IEEE80211_BAND_5GHZ;
3445         } else {
3446                 IWL_WARN(priv, "Invalid scan band count\n");
3447                 goto done;
3448         }
3449
3450         scan->tx_cmd.len = cpu_to_le16(
3451                 iwl_fill_probe_req(priv, band,
3452                                    (struct ieee80211_mgmt *)scan->data,
3453                                    IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3454
3455         /* select Rx antennas */
3456         scan->flags |= iwl3945_get_antenna_flags(priv);
3457
3458         if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
3459                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3460
3461         scan->channel_count =
3462                 iwl3945_get_channels_for_scan(priv, band, 1, /* active */
3463                                               n_probes,
3464                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3465
3466         if (scan->channel_count == 0) {
3467                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3468                 goto done;
3469         }
3470
3471         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3472             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3473         cmd.data = scan;
3474         scan->len = cpu_to_le16(cmd.len);
3475
3476         set_bit(STATUS_SCAN_HW, &priv->status);
3477         rc = iwl_send_cmd_sync(priv, &cmd);
3478         if (rc)
3479                 goto done;
3480
3481         queue_delayed_work(priv->workqueue, &priv->scan_check,
3482                            IWL_SCAN_CHECK_WATCHDOG);
3483
3484         mutex_unlock(&priv->mutex);
3485         return;
3486
3487  done:
3488         /* can not perform scan make sure we clear scanning
3489          * bits from status so next scan request can be performed.
3490          * if we dont clear scanning status bit here all next scan
3491          * will fail
3492         */
3493         clear_bit(STATUS_SCAN_HW, &priv->status);
3494         clear_bit(STATUS_SCANNING, &priv->status);
3495
3496         /* inform mac80211 scan aborted */
3497         queue_work(priv->workqueue, &priv->scan_completed);
3498         mutex_unlock(&priv->mutex);
3499 }
3500
3501 static void iwl3945_bg_up(struct work_struct *data)
3502 {
3503         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3504
3505         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3506                 return;
3507
3508         mutex_lock(&priv->mutex);
3509         __iwl3945_up(priv);
3510         mutex_unlock(&priv->mutex);
3511         iwl_rfkill_set_hw_state(priv);
3512 }
3513
3514 static void iwl3945_bg_restart(struct work_struct *data)
3515 {
3516         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3517
3518         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3519                 return;
3520
3521         iwl3945_down(priv);
3522         queue_work(priv->workqueue, &priv->up);
3523 }
3524
3525 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3526 {
3527         struct iwl_priv *priv =
3528             container_of(data, struct iwl_priv, rx_replenish);
3529
3530         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3531                 return;
3532
3533         mutex_lock(&priv->mutex);
3534         iwl3945_rx_replenish(priv);
3535         mutex_unlock(&priv->mutex);
3536 }
3537
3538 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3539
3540 static void iwl3945_post_associate(struct iwl_priv *priv)
3541 {
3542         int rc = 0;
3543         struct ieee80211_conf *conf = NULL;
3544
3545         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3546                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3547                 return;
3548         }
3549
3550
3551         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3552                         priv->assoc_id, priv->active_rxon.bssid_addr);
3553
3554         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3555                 return;
3556
3557         if (!priv->vif || !priv->is_open)
3558                 return;
3559
3560         iwl_scan_cancel_timeout(priv, 200);
3561
3562         conf = ieee80211_get_hw_conf(priv->hw);
3563
3564         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3565         iwl3945_commit_rxon(priv);
3566
3567         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3568         iwl3945_setup_rxon_timing(priv);
3569         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3570                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3571         if (rc)
3572                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3573                             "Attempting to continue.\n");
3574
3575         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3576
3577         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3578
3579         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3580                         priv->assoc_id, priv->beacon_int);
3581
3582         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3583                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3584         else
3585                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3586
3587         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3588                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3589                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3590                 else
3591                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3592
3593                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3594                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3595
3596         }
3597
3598         iwl3945_commit_rxon(priv);
3599
3600         switch (priv->iw_mode) {
3601         case NL80211_IFTYPE_STATION:
3602                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3603                 break;
3604
3605         case NL80211_IFTYPE_ADHOC:
3606
3607                 priv->assoc_id = 1;
3608                 iwl3945_add_station(priv, priv->bssid, 0, 0);
3609                 iwl3945_sync_sta(priv, IWL_STA_ID,
3610                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3611                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3612                                  CMD_ASYNC);
3613                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3614                 iwl3945_send_beacon_cmd(priv);
3615
3616                 break;
3617
3618         default:
3619                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3620                            __func__, priv->iw_mode);
3621                 break;
3622         }
3623
3624         iwl_activate_qos(priv, 0);
3625
3626         /* we have just associated, don't start scan too early */
3627         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3628 }
3629
3630 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed);
3631
3632 /*****************************************************************************
3633  *
3634  * mac80211 entry point functions
3635  *
3636  *****************************************************************************/
3637
3638 #define UCODE_READY_TIMEOUT     (2 * HZ)
3639
3640 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3641 {
3642         struct iwl_priv *priv = hw->priv;
3643         int ret;
3644
3645         IWL_DEBUG_MAC80211(priv, "enter\n");
3646
3647         /* we should be verifying the device is ready to be opened */
3648         mutex_lock(&priv->mutex);
3649
3650         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
3651         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3652          * ucode filename and max sizes are card-specific. */
3653
3654         if (!priv->ucode_code.len) {
3655                 ret = iwl3945_read_ucode(priv);
3656                 if (ret) {
3657                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3658                         mutex_unlock(&priv->mutex);
3659                         goto out_release_irq;
3660                 }
3661         }
3662
3663         ret = __iwl3945_up(priv);
3664
3665         mutex_unlock(&priv->mutex);
3666
3667         iwl_rfkill_set_hw_state(priv);
3668
3669         if (ret)
3670                 goto out_release_irq;
3671
3672         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3673
3674         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
3675                 return 0;
3676
3677         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3678          * mac80211 will not be run successfully. */
3679         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3680                         test_bit(STATUS_READY, &priv->status),
3681                         UCODE_READY_TIMEOUT);
3682         if (!ret) {
3683                 if (!test_bit(STATUS_READY, &priv->status)) {
3684                         IWL_ERR(priv,
3685                                 "Wait for START_ALIVE timeout after %dms.\n",
3686                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3687                         ret = -ETIMEDOUT;
3688                         goto out_release_irq;
3689                 }
3690         }
3691
3692         /* ucode is running and will send rfkill notifications,
3693          * no need to poll the killswitch state anymore */
3694         cancel_delayed_work(&priv->rfkill_poll);
3695
3696         priv->is_open = 1;
3697         IWL_DEBUG_MAC80211(priv, "leave\n");
3698         return 0;
3699
3700 out_release_irq:
3701         priv->is_open = 0;
3702         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3703         return ret;
3704 }
3705
3706 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3707 {
3708         struct iwl_priv *priv = hw->priv;
3709
3710         IWL_DEBUG_MAC80211(priv, "enter\n");
3711
3712         if (!priv->is_open) {
3713                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3714                 return;
3715         }
3716
3717         priv->is_open = 0;
3718
3719         if (iwl_is_ready_rf(priv)) {
3720                 /* stop mac, cancel any scan request and clear
3721                  * RXON_FILTER_ASSOC_MSK BIT
3722                  */
3723                 mutex_lock(&priv->mutex);
3724                 iwl_scan_cancel_timeout(priv, 100);
3725                 mutex_unlock(&priv->mutex);
3726         }
3727
3728         iwl3945_down(priv);
3729
3730         flush_workqueue(priv->workqueue);
3731
3732         /* start polling the killswitch state again */
3733         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3734                            round_jiffies_relative(2 * HZ));
3735
3736         IWL_DEBUG_MAC80211(priv, "leave\n");
3737 }
3738
3739 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3740 {
3741         struct iwl_priv *priv = hw->priv;
3742
3743         IWL_DEBUG_MAC80211(priv, "enter\n");
3744
3745         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3746                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3747
3748         if (iwl3945_tx_skb(priv, skb))
3749                 dev_kfree_skb_any(skb);
3750
3751         IWL_DEBUG_MAC80211(priv, "leave\n");
3752         return NETDEV_TX_OK;
3753 }
3754
3755 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
3756                                  struct ieee80211_if_init_conf *conf)
3757 {
3758         struct iwl_priv *priv = hw->priv;
3759         unsigned long flags;
3760
3761         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
3762
3763         if (priv->vif) {
3764                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
3765                 return -EOPNOTSUPP;
3766         }
3767
3768         spin_lock_irqsave(&priv->lock, flags);
3769         priv->vif = conf->vif;
3770         priv->iw_mode = conf->type;
3771
3772         spin_unlock_irqrestore(&priv->lock, flags);
3773
3774         mutex_lock(&priv->mutex);
3775
3776         if (conf->mac_addr) {
3777                 IWL_DEBUG_MAC80211(priv, "Set: %pM\n", conf->mac_addr);
3778                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
3779         }
3780
3781         if (iwl_is_ready(priv))
3782                 iwl3945_set_mode(priv, conf->type);
3783
3784         mutex_unlock(&priv->mutex);
3785
3786         IWL_DEBUG_MAC80211(priv, "leave\n");
3787         return 0;
3788 }
3789
3790 /**
3791  * iwl3945_mac_config - mac80211 config callback
3792  *
3793  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
3794  * be set inappropriately and the driver currently sets the hardware up to
3795  * use it whenever needed.
3796  */
3797 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
3798 {
3799         struct iwl_priv *priv = hw->priv;
3800         const struct iwl_channel_info *ch_info;
3801         struct ieee80211_conf *conf = &hw->conf;
3802         unsigned long flags;
3803         int ret = 0;
3804
3805         mutex_lock(&priv->mutex);
3806         IWL_DEBUG_MAC80211(priv, "enter to channel %d\n",
3807                                 conf->channel->hw_value);
3808
3809         if (!iwl_is_ready(priv)) {
3810                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
3811                 ret = -EIO;
3812                 goto out;
3813         }
3814
3815         if (unlikely(!iwl3945_mod_params.disable_hw_scan &&
3816                      test_bit(STATUS_SCANNING, &priv->status))) {
3817                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
3818                 set_bit(STATUS_CONF_PENDING, &priv->status);
3819                 mutex_unlock(&priv->mutex);
3820                 return 0;
3821         }
3822
3823         spin_lock_irqsave(&priv->lock, flags);
3824
3825         ch_info = iwl_get_channel_info(priv, conf->channel->band,
3826                                        conf->channel->hw_value);
3827         if (!is_channel_valid(ch_info)) {
3828                 IWL_DEBUG_SCAN(priv,
3829                                 "Channel %d [%d] is INVALID for this band.\n",
3830                                 conf->channel->hw_value, conf->channel->band);
3831                 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
3832                 spin_unlock_irqrestore(&priv->lock, flags);
3833                 ret = -EINVAL;
3834                 goto out;
3835         }
3836
3837         iwl_set_rxon_channel(priv, conf->channel);
3838
3839         iwl_set_flags_for_band(priv, conf->channel->band);
3840
3841         /* The list of supported rates and rate mask can be different
3842          * for each phymode; since the phymode may have changed, reset
3843          * the rate mask to what mac80211 lists */
3844         iwl_set_rate(priv);
3845
3846         spin_unlock_irqrestore(&priv->lock, flags);
3847
3848 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
3849         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
3850                 iwl3945_hw_channel_switch(priv, conf->channel);
3851                 goto out;
3852         }
3853 #endif
3854
3855         if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
3856                 IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - waiting for uCode\n");
3857                 goto out;
3858         }
3859
3860         if (!conf->radio_enabled) {
3861                 iwl_radio_kill_sw_disable_radio(priv);
3862                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
3863                 goto out;
3864         }
3865
3866         if (iwl_is_rfkill(priv)) {
3867                 IWL_DEBUG_MAC80211(priv, "leave - RF kill\n");
3868                 ret = -EIO;
3869                 goto out;
3870         }
3871
3872         iwl_set_rate(priv);
3873
3874         if (memcmp(&priv->active_rxon,
3875                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
3876                 iwl3945_commit_rxon(priv);
3877         else
3878                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration\n");
3879
3880         IWL_DEBUG_MAC80211(priv, "leave\n");
3881
3882 out:
3883         clear_bit(STATUS_CONF_PENDING, &priv->status);
3884         mutex_unlock(&priv->mutex);
3885         return ret;
3886 }
3887
3888 static void iwl3945_config_ap(struct iwl_priv *priv)
3889 {
3890         int rc = 0;
3891
3892         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3893                 return;
3894
3895         /* The following should be done only at AP bring up */
3896         if (!(iwl_is_associated(priv))) {
3897
3898                 /* RXON - unassoc (to set timing command) */
3899                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3900                 iwl3945_commit_rxon(priv);
3901
3902                 /* RXON Timing */
3903                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3904                 iwl3945_setup_rxon_timing(priv);
3905                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3906                                       sizeof(priv->rxon_timing),
3907                                       &priv->rxon_timing);
3908                 if (rc)
3909                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3910                                         "Attempting to continue.\n");
3911
3912                 /* FIXME: what should be the assoc_id for AP? */
3913                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3914                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3915                         priv->staging_rxon.flags |=
3916                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3917                 else
3918                         priv->staging_rxon.flags &=
3919                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3920
3921                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3922                         if (priv->assoc_capability &
3923                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3924                                 priv->staging_rxon.flags |=
3925                                         RXON_FLG_SHORT_SLOT_MSK;
3926                         else
3927                                 priv->staging_rxon.flags &=
3928                                         ~RXON_FLG_SHORT_SLOT_MSK;
3929
3930                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3931                                 priv->staging_rxon.flags &=
3932                                         ~RXON_FLG_SHORT_SLOT_MSK;
3933                 }
3934                 /* restore RXON assoc */
3935                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3936                 iwl3945_commit_rxon(priv);
3937                 iwl3945_add_station(priv, iwl_bcast_addr, 0, 0);
3938         }
3939         iwl3945_send_beacon_cmd(priv);
3940
3941         /* FIXME - we need to add code here to detect a totally new
3942          * configuration, reset the AP, unassoc, rxon timing, assoc,
3943          * clear sta table, add BCAST sta... */
3944 }
3945
3946 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
3947                                         struct ieee80211_vif *vif,
3948                                         struct ieee80211_if_conf *conf)
3949 {
3950         struct iwl_priv *priv = hw->priv;
3951         int rc;
3952
3953         if (conf == NULL)
3954                 return -EIO;
3955
3956         if (priv->vif != vif) {
3957                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
3958                 return 0;
3959         }
3960
3961         /* handle this temporarily here */
3962         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
3963             conf->changed & IEEE80211_IFCC_BEACON) {
3964                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
3965                 if (!beacon)
3966                         return -ENOMEM;
3967                 mutex_lock(&priv->mutex);
3968                 rc = iwl3945_mac_beacon_update(hw, beacon);
3969                 mutex_unlock(&priv->mutex);
3970                 if (rc)
3971                         return rc;
3972         }
3973
3974         if (!iwl_is_alive(priv))
3975                 return -EAGAIN;
3976
3977         mutex_lock(&priv->mutex);
3978
3979         if (conf->bssid)
3980                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
3981
3982 /*
3983  * very dubious code was here; the probe filtering flag is never set:
3984  *
3985         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
3986             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
3987  */
3988
3989         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3990                 if (!conf->bssid) {
3991                         conf->bssid = priv->mac_addr;
3992                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
3993                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
3994                                            conf->bssid);
3995                 }
3996                 if (priv->ibss_beacon)
3997                         dev_kfree_skb(priv->ibss_beacon);
3998
3999                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
4000         }
4001
4002         if (iwl_is_rfkill(priv))
4003                 goto done;
4004
4005         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
4006             !is_multicast_ether_addr(conf->bssid)) {
4007                 /* If there is currently a HW scan going on in the background
4008                  * then we need to cancel it else the RXON below will fail. */
4009                 if (iwl_scan_cancel_timeout(priv, 100)) {
4010                         IWL_WARN(priv, "Aborted scan still in progress "
4011                                     "after 100ms\n");
4012                         IWL_DEBUG_MAC80211(priv, "leaving:scan abort failed\n");
4013                         mutex_unlock(&priv->mutex);
4014                         return -EAGAIN;
4015                 }
4016                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
4017
4018                 /* TODO: Audit driver for usage of these members and see
4019                  * if mac80211 deprecates them (priv->bssid looks like it
4020                  * shouldn't be there, but I haven't scanned the IBSS code
4021                  * to verify) - jpk */
4022                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
4023
4024                 if (priv->iw_mode == NL80211_IFTYPE_AP)
4025                         iwl3945_config_ap(priv);
4026                 else {
4027                         rc = iwl3945_commit_rxon(priv);
4028                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
4029                                 iwl3945_add_station(priv,
4030                                         priv->active_rxon.bssid_addr, 1, 0);
4031                 }
4032
4033         } else {
4034                 iwl_scan_cancel_timeout(priv, 100);
4035                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4036                 iwl3945_commit_rxon(priv);
4037         }
4038
4039  done:
4040         IWL_DEBUG_MAC80211(priv, "leave\n");
4041         mutex_unlock(&priv->mutex);
4042
4043         return 0;
4044 }
4045
4046 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
4047                                      struct ieee80211_if_init_conf *conf)
4048 {
4049         struct iwl_priv *priv = hw->priv;
4050
4051         IWL_DEBUG_MAC80211(priv, "enter\n");
4052
4053         mutex_lock(&priv->mutex);
4054
4055         if (iwl_is_ready_rf(priv)) {
4056                 iwl_scan_cancel_timeout(priv, 100);
4057                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4058                 iwl3945_commit_rxon(priv);
4059         }
4060         if (priv->vif == conf->vif) {
4061                 priv->vif = NULL;
4062                 memset(priv->bssid, 0, ETH_ALEN);
4063         }
4064         mutex_unlock(&priv->mutex);
4065
4066         IWL_DEBUG_MAC80211(priv, "leave\n");
4067 }
4068
4069 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
4070
4071 static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
4072                                      struct ieee80211_vif *vif,
4073                                      struct ieee80211_bss_conf *bss_conf,
4074                                      u32 changes)
4075 {
4076         struct iwl_priv *priv = hw->priv;
4077
4078         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
4079
4080         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
4081                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
4082                                    bss_conf->use_short_preamble);
4083                 if (bss_conf->use_short_preamble)
4084                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4085                 else
4086                         priv->staging_rxon.flags &=
4087                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
4088         }
4089
4090         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
4091                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n",
4092                                    bss_conf->use_cts_prot);
4093                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
4094                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
4095                 else
4096                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
4097         }
4098
4099         if (changes & BSS_CHANGED_ASSOC) {
4100                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
4101                 /* This should never happen as this function should
4102                  * never be called from interrupt context. */
4103                 if (WARN_ON_ONCE(in_interrupt()))
4104                         return;
4105                 if (bss_conf->assoc) {
4106                         priv->assoc_id = bss_conf->aid;
4107                         priv->beacon_int = bss_conf->beacon_int;
4108                         priv->timestamp = bss_conf->timestamp;
4109                         priv->assoc_capability = bss_conf->assoc_capability;
4110                         priv->power_data.dtim_period = bss_conf->dtim_period;
4111                         priv->next_scan_jiffies = jiffies +
4112                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4113                         mutex_lock(&priv->mutex);
4114                         iwl3945_post_associate(priv);
4115                         mutex_unlock(&priv->mutex);
4116                 } else {
4117                         priv->assoc_id = 0;
4118                         IWL_DEBUG_MAC80211(priv,
4119                                         "DISASSOC %d\n", bss_conf->assoc);
4120                 }
4121         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
4122                         IWL_DEBUG_MAC80211(priv,
4123                                         "Associated Changes %d\n", changes);
4124                         iwl3945_send_rxon_assoc(priv);
4125         }
4126
4127 }
4128
4129 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
4130                                struct ieee80211_vif *vif,
4131                                struct ieee80211_sta *sta,
4132                                struct ieee80211_key_conf *key)
4133 {
4134         struct iwl_priv *priv = hw->priv;
4135         const u8 *addr;
4136         int ret = 0;
4137         u8 sta_id = IWL_INVALID_STATION;
4138         u8 static_key;
4139
4140         IWL_DEBUG_MAC80211(priv, "enter\n");
4141
4142         if (iwl3945_mod_params.sw_crypto) {
4143                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
4144                 return -EOPNOTSUPP;
4145         }
4146
4147         addr = sta ? sta->addr : iwl_bcast_addr;
4148         static_key = !iwl_is_associated(priv);
4149
4150         if (!static_key) {
4151                 sta_id = iwl3945_hw_find_station(priv, addr);
4152                 if (sta_id == IWL_INVALID_STATION) {
4153                         IWL_DEBUG_MAC80211(priv, "leave - %pMnot in station map.\n",
4154                                             addr);
4155                         return -EINVAL;
4156                 }
4157         }
4158
4159         mutex_lock(&priv->mutex);
4160         iwl_scan_cancel_timeout(priv, 100);
4161         mutex_unlock(&priv->mutex);
4162
4163         switch (cmd) {
4164         case SET_KEY:
4165                 if (static_key)
4166                         ret = iwl3945_set_static_key(priv, key);
4167                 else
4168                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
4169                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
4170                 break;
4171         case DISABLE_KEY:
4172                 if (static_key)
4173                         ret = iwl3945_remove_static_key(priv);
4174                 else
4175                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
4176                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
4177                 break;
4178         default:
4179                 ret = -EINVAL;
4180         }
4181
4182         IWL_DEBUG_MAC80211(priv, "leave\n");
4183
4184         return ret;
4185 }
4186
4187 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
4188                            const struct ieee80211_tx_queue_params *params)
4189 {
4190         struct iwl_priv *priv = hw->priv;
4191         unsigned long flags;
4192         int q;
4193
4194         IWL_DEBUG_MAC80211(priv, "enter\n");
4195
4196         if (!iwl_is_ready_rf(priv)) {
4197                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
4198                 return -EIO;
4199         }
4200
4201         if (queue >= AC_NUM) {
4202                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
4203                 return 0;
4204         }
4205
4206         q = AC_NUM - 1 - queue;
4207
4208         spin_lock_irqsave(&priv->lock, flags);
4209
4210         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
4211         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
4212         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4213         priv->qos_data.def_qos_parm.ac[q].edca_txop =
4214                         cpu_to_le16((params->txop * 32));
4215
4216         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4217         priv->qos_data.qos_active = 1;
4218
4219         spin_unlock_irqrestore(&priv->lock, flags);
4220
4221         mutex_lock(&priv->mutex);
4222         if (priv->iw_mode == NL80211_IFTYPE_AP)
4223                 iwl_activate_qos(priv, 1);
4224         else if (priv->assoc_id && iwl_is_associated(priv))
4225                 iwl_activate_qos(priv, 0);
4226
4227         mutex_unlock(&priv->mutex);
4228
4229         IWL_DEBUG_MAC80211(priv, "leave\n");
4230         return 0;
4231 }
4232
4233 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
4234                                 struct ieee80211_tx_queue_stats *stats)
4235 {
4236         struct iwl_priv *priv = hw->priv;
4237         int i, avail;
4238         struct iwl_tx_queue *txq;
4239         struct iwl_queue *q;
4240         unsigned long flags;
4241
4242         IWL_DEBUG_MAC80211(priv, "enter\n");
4243
4244         if (!iwl_is_ready_rf(priv)) {
4245                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
4246                 return -EIO;
4247         }
4248
4249         spin_lock_irqsave(&priv->lock, flags);
4250
4251         for (i = 0; i < AC_NUM; i++) {
4252                 txq = &priv->txq[i];
4253                 q = &txq->q;
4254                 avail = iwl_queue_space(q);
4255
4256                 stats[i].len = q->n_window - avail;
4257                 stats[i].limit = q->n_window - q->high_mark;
4258                 stats[i].count = q->n_window;
4259
4260         }
4261         spin_unlock_irqrestore(&priv->lock, flags);
4262
4263         IWL_DEBUG_MAC80211(priv, "leave\n");
4264
4265         return 0;
4266 }
4267
4268 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
4269 {
4270         struct iwl_priv *priv = hw->priv;
4271         unsigned long flags;
4272
4273         mutex_lock(&priv->mutex);
4274         IWL_DEBUG_MAC80211(priv, "enter\n");
4275
4276         iwl_reset_qos(priv);
4277
4278         spin_lock_irqsave(&priv->lock, flags);
4279         priv->assoc_id = 0;
4280         priv->assoc_capability = 0;
4281
4282         /* new association get rid of ibss beacon skb */
4283         if (priv->ibss_beacon)
4284                 dev_kfree_skb(priv->ibss_beacon);
4285
4286         priv->ibss_beacon = NULL;
4287
4288         priv->beacon_int = priv->hw->conf.beacon_int;
4289         priv->timestamp = 0;
4290         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
4291                 priv->beacon_int = 0;
4292
4293         spin_unlock_irqrestore(&priv->lock, flags);
4294
4295         if (!iwl_is_ready_rf(priv)) {
4296                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
4297                 mutex_unlock(&priv->mutex);
4298                 return;
4299         }
4300
4301         /* we are restarting association process
4302          * clear RXON_FILTER_ASSOC_MSK bit
4303         */
4304         if (priv->iw_mode != NL80211_IFTYPE_AP) {
4305                 iwl_scan_cancel_timeout(priv, 100);
4306                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4307                 iwl3945_commit_rxon(priv);
4308         }
4309
4310         /* Per mac80211.h: This is only used in IBSS mode... */
4311         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
4312
4313                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
4314                 mutex_unlock(&priv->mutex);
4315                 return;
4316         }
4317
4318         iwl_set_rate(priv);
4319
4320         mutex_unlock(&priv->mutex);
4321
4322         IWL_DEBUG_MAC80211(priv, "leave\n");
4323
4324 }
4325
4326 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
4327 {
4328         struct iwl_priv *priv = hw->priv;
4329         unsigned long flags;
4330         __le64 timestamp;
4331
4332         IWL_DEBUG_MAC80211(priv, "enter\n");
4333
4334         if (!iwl_is_ready_rf(priv)) {
4335                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
4336                 return -EIO;
4337         }
4338
4339         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
4340                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
4341                 return -EIO;
4342         }
4343
4344         spin_lock_irqsave(&priv->lock, flags);
4345
4346         if (priv->ibss_beacon)
4347                 dev_kfree_skb(priv->ibss_beacon);
4348
4349         priv->ibss_beacon = skb;
4350
4351         priv->assoc_id = 0;
4352         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
4353         priv->timestamp = le64_to_cpu(timestamp);
4354
4355         IWL_DEBUG_MAC80211(priv, "leave\n");
4356         spin_unlock_irqrestore(&priv->lock, flags);
4357
4358         iwl_reset_qos(priv);
4359
4360         iwl3945_post_associate(priv);
4361
4362
4363         return 0;
4364 }
4365
4366 /*****************************************************************************
4367  *
4368  * sysfs attributes
4369  *
4370  *****************************************************************************/
4371
4372 #ifdef CONFIG_IWLWIFI_DEBUG
4373
4374 /*
4375  * The following adds a new attribute to the sysfs representation
4376  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
4377  * used for controlling the debug level.
4378  *
4379  * See the level definitions in iwl for details.
4380  */
4381 static ssize_t show_debug_level(struct device *d,
4382                                 struct device_attribute *attr, char *buf)
4383 {
4384         struct iwl_priv *priv = d->driver_data;
4385
4386         return sprintf(buf, "0x%08X\n", priv->debug_level);
4387 }
4388 static ssize_t store_debug_level(struct device *d,
4389                                 struct device_attribute *attr,
4390                                  const char *buf, size_t count)
4391 {
4392         struct iwl_priv *priv = d->driver_data;
4393         unsigned long val;
4394         int ret;
4395
4396         ret = strict_strtoul(buf, 0, &val);
4397         if (ret)
4398                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
4399         else
4400                 priv->debug_level = val;
4401
4402         return strnlen(buf, count);
4403 }
4404
4405 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
4406                         show_debug_level, store_debug_level);
4407
4408 #endif /* CONFIG_IWLWIFI_DEBUG */
4409
4410 static ssize_t show_temperature(struct device *d,
4411                                 struct device_attribute *attr, char *buf)
4412 {
4413         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4414
4415         if (!iwl_is_alive(priv))
4416                 return -EAGAIN;
4417
4418         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
4419 }
4420
4421 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
4422
4423 static ssize_t show_tx_power(struct device *d,
4424                              struct device_attribute *attr, char *buf)
4425 {
4426         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4427         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
4428 }
4429
4430 static ssize_t store_tx_power(struct device *d,
4431                               struct device_attribute *attr,
4432                               const char *buf, size_t count)
4433 {
4434         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4435         char *p = (char *)buf;
4436         u32 val;
4437
4438         val = simple_strtoul(p, &p, 10);
4439         if (p == buf)
4440                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
4441         else
4442                 iwl3945_hw_reg_set_txpower(priv, val);
4443
4444         return count;
4445 }
4446
4447 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
4448
4449 static ssize_t show_flags(struct device *d,
4450                           struct device_attribute *attr, char *buf)
4451 {
4452         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4453
4454         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
4455 }
4456
4457 static ssize_t store_flags(struct device *d,
4458                            struct device_attribute *attr,
4459                            const char *buf, size_t count)
4460 {
4461         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4462         u32 flags = simple_strtoul(buf, NULL, 0);
4463
4464         mutex_lock(&priv->mutex);
4465         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
4466                 /* Cancel any currently running scans... */
4467                 if (iwl_scan_cancel_timeout(priv, 100))
4468                         IWL_WARN(priv, "Could not cancel scan.\n");
4469                 else {
4470                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
4471                                        flags);
4472                         priv->staging_rxon.flags = cpu_to_le32(flags);
4473                         iwl3945_commit_rxon(priv);
4474                 }
4475         }
4476         mutex_unlock(&priv->mutex);
4477
4478         return count;
4479 }
4480
4481 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
4482
4483 static ssize_t show_filter_flags(struct device *d,
4484                                  struct device_attribute *attr, char *buf)
4485 {
4486         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4487
4488         return sprintf(buf, "0x%04X\n",
4489                 le32_to_cpu(priv->active_rxon.filter_flags));
4490 }
4491
4492 static ssize_t store_filter_flags(struct device *d,
4493                                   struct device_attribute *attr,
4494                                   const char *buf, size_t count)
4495 {
4496         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4497         u32 filter_flags = simple_strtoul(buf, NULL, 0);
4498
4499         mutex_lock(&priv->mutex);
4500         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
4501                 /* Cancel any currently running scans... */
4502                 if (iwl_scan_cancel_timeout(priv, 100))
4503                         IWL_WARN(priv, "Could not cancel scan.\n");
4504                 else {
4505                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
4506                                        "0x%04X\n", filter_flags);
4507                         priv->staging_rxon.filter_flags =
4508                                 cpu_to_le32(filter_flags);
4509                         iwl3945_commit_rxon(priv);
4510                 }
4511         }
4512         mutex_unlock(&priv->mutex);
4513
4514         return count;
4515 }
4516
4517 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
4518                    store_filter_flags);
4519
4520 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
4521
4522 static ssize_t show_measurement(struct device *d,
4523                                 struct device_attribute *attr, char *buf)
4524 {
4525         struct iwl_priv *priv = dev_get_drvdata(d);
4526         struct iwl_spectrum_notification measure_report;
4527         u32 size = sizeof(measure_report), len = 0, ofs = 0;
4528         u8 *data = (u8 *)&measure_report;
4529         unsigned long flags;
4530
4531         spin_lock_irqsave(&priv->lock, flags);
4532         if (!(priv->measurement_status & MEASUREMENT_READY)) {
4533                 spin_unlock_irqrestore(&priv->lock, flags);
4534                 return 0;
4535         }
4536         memcpy(&measure_report, &priv->measure_report, size);
4537         priv->measurement_status = 0;
4538         spin_unlock_irqrestore(&priv->lock, flags);
4539
4540         while (size && (PAGE_SIZE - len)) {
4541                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
4542                                    PAGE_SIZE - len, 1);
4543                 len = strlen(buf);
4544                 if (PAGE_SIZE - len)
4545                         buf[len++] = '\n';
4546
4547                 ofs += 16;
4548                 size -= min(size, 16U);
4549         }
4550
4551         return len;
4552 }
4553
4554 static ssize_t store_measurement(struct device *d,
4555                                  struct device_attribute *attr,
4556                                  const char *buf, size_t count)
4557 {
4558         struct iwl_priv *priv = dev_get_drvdata(d);
4559         struct ieee80211_measurement_params params = {
4560                 .channel = le16_to_cpu(priv->active_rxon.channel),
4561                 .start_time = cpu_to_le64(priv->last_tsf),
4562                 .duration = cpu_to_le16(1),
4563         };
4564         u8 type = IWL_MEASURE_BASIC;
4565         u8 buffer[32];
4566         u8 channel;
4567
4568         if (count) {
4569                 char *p = buffer;
4570                 strncpy(buffer, buf, min(sizeof(buffer), count));
4571                 channel = simple_strtoul(p, NULL, 0);
4572                 if (channel)
4573                         params.channel = channel;
4574
4575                 p = buffer;
4576                 while (*p && *p != ' ')
4577                         p++;
4578                 if (*p)
4579                         type = simple_strtoul(p + 1, NULL, 0);
4580         }
4581
4582         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
4583                        "channel %d (for '%s')\n", type, params.channel, buf);
4584         iwl3945_get_measurement(priv, &params, type);
4585
4586         return count;
4587 }
4588
4589 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
4590                    show_measurement, store_measurement);
4591 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
4592
4593 static ssize_t store_retry_rate(struct device *d,
4594                                 struct device_attribute *attr,
4595                                 const char *buf, size_t count)
4596 {
4597         struct iwl_priv *priv = dev_get_drvdata(d);
4598
4599         priv->retry_rate = simple_strtoul(buf, NULL, 0);
4600         if (priv->retry_rate <= 0)
4601                 priv->retry_rate = 1;
4602
4603         return count;
4604 }
4605
4606 static ssize_t show_retry_rate(struct device *d,
4607                                struct device_attribute *attr, char *buf)
4608 {
4609         struct iwl_priv *priv = dev_get_drvdata(d);
4610         return sprintf(buf, "%d", priv->retry_rate);
4611 }
4612
4613 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
4614                    store_retry_rate);
4615
4616
4617 static ssize_t store_power_level(struct device *d,
4618                                  struct device_attribute *attr,
4619                                  const char *buf, size_t count)
4620 {
4621         struct iwl_priv *priv = dev_get_drvdata(d);
4622         int ret;
4623         unsigned long mode;
4624
4625
4626         mutex_lock(&priv->mutex);
4627
4628         if (!iwl_is_ready(priv)) {
4629                 ret = -EAGAIN;
4630                 goto out;
4631         }
4632
4633         ret = strict_strtoul(buf, 10, &mode);
4634         if (ret)
4635                 goto out;
4636
4637         ret = iwl_power_set_user_mode(priv, mode);
4638         if (ret) {
4639                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
4640                 goto out;
4641         }
4642         ret = count;
4643
4644  out:
4645         mutex_unlock(&priv->mutex);
4646         return ret;
4647 }
4648
4649 static ssize_t show_power_level(struct device *d,
4650                                 struct device_attribute *attr, char *buf)
4651 {
4652         struct iwl_priv *priv = dev_get_drvdata(d);
4653         int mode = priv->power_data.user_power_setting;
4654         int system = priv->power_data.system_power_setting;
4655         int level = priv->power_data.power_mode;
4656         char *p = buf;
4657
4658         switch (system) {
4659         case IWL_POWER_SYS_AUTO:
4660                 p += sprintf(p, "SYSTEM:auto");
4661                 break;
4662         case IWL_POWER_SYS_AC:
4663                 p += sprintf(p, "SYSTEM:ac");
4664                 break;
4665         case IWL_POWER_SYS_BATTERY:
4666                 p += sprintf(p, "SYSTEM:battery");
4667                 break;
4668         }
4669
4670         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
4671                         "fixed" : "auto");
4672         p += sprintf(p, "\tINDEX:%d", level);
4673         p += sprintf(p, "\n");
4674         return p - buf + 1;
4675 }
4676
4677 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR,
4678                    show_power_level, store_power_level);
4679
4680 #define MAX_WX_STRING 80
4681
4682 /* Values are in microsecond */
4683 static const s32 timeout_duration[] = {
4684         350000,
4685         250000,
4686         75000,
4687         37000,
4688         25000,
4689 };
4690 static const s32 period_duration[] = {
4691         400000,
4692         700000,
4693         1000000,
4694         1000000,
4695         1000000
4696 };
4697
4698 static ssize_t show_channels(struct device *d,
4699                              struct device_attribute *attr, char *buf)
4700 {
4701         /* all this shit doesn't belong into sysfs anyway */
4702         return 0;
4703 }
4704
4705 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
4706
4707 static ssize_t show_statistics(struct device *d,
4708                                struct device_attribute *attr, char *buf)
4709 {
4710         struct iwl_priv *priv = dev_get_drvdata(d);
4711         u32 size = sizeof(struct iwl3945_notif_statistics);
4712         u32 len = 0, ofs = 0;
4713         u8 *data = (u8 *)&priv->statistics_39;
4714         int rc = 0;
4715
4716         if (!iwl_is_alive(priv))
4717                 return -EAGAIN;
4718
4719         mutex_lock(&priv->mutex);
4720         rc = iwl_send_statistics_request(priv, 0);
4721         mutex_unlock(&priv->mutex);
4722
4723         if (rc) {
4724                 len = sprintf(buf,
4725                               "Error sending statistics request: 0x%08X\n", rc);
4726                 return len;
4727         }
4728
4729         while (size && (PAGE_SIZE - len)) {
4730                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
4731                                    PAGE_SIZE - len, 1);
4732                 len = strlen(buf);
4733                 if (PAGE_SIZE - len)
4734                         buf[len++] = '\n';
4735
4736                 ofs += 16;
4737                 size -= min(size, 16U);
4738         }
4739
4740         return len;
4741 }
4742
4743 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
4744
4745 static ssize_t show_antenna(struct device *d,
4746                             struct device_attribute *attr, char *buf)
4747 {
4748         struct iwl_priv *priv = dev_get_drvdata(d);
4749
4750         if (!iwl_is_alive(priv))
4751                 return -EAGAIN;
4752
4753         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
4754 }
4755
4756 static ssize_t store_antenna(struct device *d,
4757                              struct device_attribute *attr,
4758                              const char *buf, size_t count)
4759 {
4760         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
4761         int ant;
4762
4763         if (count == 0)
4764                 return 0;
4765
4766         if (sscanf(buf, "%1i", &ant) != 1) {
4767                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
4768                 return count;
4769         }
4770
4771         if ((ant >= 0) && (ant <= 2)) {
4772                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
4773                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
4774         } else
4775                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
4776
4777
4778         return count;
4779 }
4780
4781 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
4782
4783 static ssize_t show_status(struct device *d,
4784                            struct device_attribute *attr, char *buf)
4785 {
4786         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4787         if (!iwl_is_alive(priv))
4788                 return -EAGAIN;
4789         return sprintf(buf, "0x%08x\n", (int)priv->status);
4790 }
4791
4792 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
4793
4794 static ssize_t dump_error_log(struct device *d,
4795                               struct device_attribute *attr,
4796                               const char *buf, size_t count)
4797 {
4798         char *p = (char *)buf;
4799
4800         if (p[0] == '1')
4801                 iwl3945_dump_nic_error_log((struct iwl_priv *)d->driver_data);
4802
4803         return strnlen(buf, count);
4804 }
4805
4806 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
4807
4808 static ssize_t dump_event_log(struct device *d,
4809                               struct device_attribute *attr,
4810                               const char *buf, size_t count)
4811 {
4812         char *p = (char *)buf;
4813
4814         if (p[0] == '1')
4815                 iwl3945_dump_nic_event_log((struct iwl_priv *)d->driver_data);
4816
4817         return strnlen(buf, count);
4818 }
4819
4820 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
4821
4822 /*****************************************************************************
4823  *
4824  * driver setup and tear down
4825  *
4826  *****************************************************************************/
4827
4828 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
4829 {
4830         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
4831
4832         init_waitqueue_head(&priv->wait_command_queue);
4833
4834         INIT_WORK(&priv->up, iwl3945_bg_up);
4835         INIT_WORK(&priv->restart, iwl3945_bg_restart);
4836         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
4837         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
4838         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
4839         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
4840         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
4841         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
4842         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
4843         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
4844         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
4845         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
4846
4847         iwl3945_hw_setup_deferred_work(priv);
4848
4849         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
4850                      iwl3945_irq_tasklet, (unsigned long)priv);
4851 }
4852
4853 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
4854 {
4855         iwl3945_hw_cancel_deferred_work(priv);
4856
4857         cancel_delayed_work_sync(&priv->init_alive_start);
4858         cancel_delayed_work(&priv->scan_check);
4859         cancel_delayed_work(&priv->alive_start);
4860         cancel_work_sync(&priv->beacon_update);
4861 }
4862
4863 static struct attribute *iwl3945_sysfs_entries[] = {
4864         &dev_attr_antenna.attr,
4865         &dev_attr_channels.attr,
4866         &dev_attr_dump_errors.attr,
4867         &dev_attr_dump_events.attr,
4868         &dev_attr_flags.attr,
4869         &dev_attr_filter_flags.attr,
4870 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
4871         &dev_attr_measurement.attr,
4872 #endif
4873         &dev_attr_power_level.attr,
4874         &dev_attr_retry_rate.attr,
4875         &dev_attr_statistics.attr,
4876         &dev_attr_status.attr,
4877         &dev_attr_temperature.attr,
4878         &dev_attr_tx_power.attr,
4879 #ifdef CONFIG_IWLWIFI_DEBUG
4880         &dev_attr_debug_level.attr,
4881 #endif
4882         NULL
4883 };
4884
4885 static struct attribute_group iwl3945_attribute_group = {
4886         .name = NULL,           /* put in device directory */
4887         .attrs = iwl3945_sysfs_entries,
4888 };
4889
4890 static struct ieee80211_ops iwl3945_hw_ops = {
4891         .tx = iwl3945_mac_tx,
4892         .start = iwl3945_mac_start,
4893         .stop = iwl3945_mac_stop,
4894         .add_interface = iwl3945_mac_add_interface,
4895         .remove_interface = iwl3945_mac_remove_interface,
4896         .config = iwl3945_mac_config,
4897         .config_interface = iwl3945_mac_config_interface,
4898         .configure_filter = iwl_configure_filter,
4899         .set_key = iwl3945_mac_set_key,
4900         .get_tx_stats = iwl3945_mac_get_tx_stats,
4901         .conf_tx = iwl3945_mac_conf_tx,
4902         .reset_tsf = iwl3945_mac_reset_tsf,
4903         .bss_info_changed = iwl3945_bss_info_changed,
4904         .hw_scan = iwl_mac_hw_scan
4905 };
4906
4907 static int iwl3945_init_drv(struct iwl_priv *priv)
4908 {
4909         int ret;
4910         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4911
4912         priv->retry_rate = 1;
4913         priv->ibss_beacon = NULL;
4914
4915         spin_lock_init(&priv->lock);
4916         spin_lock_init(&priv->power_data.lock);
4917         spin_lock_init(&priv->sta_lock);
4918         spin_lock_init(&priv->hcmd_lock);
4919
4920         INIT_LIST_HEAD(&priv->free_frames);
4921
4922         mutex_init(&priv->mutex);
4923
4924         /* Clear the driver's (not device's) station table */
4925         iwl3945_clear_stations_table(priv);
4926
4927         priv->data_retry_limit = -1;
4928         priv->ieee_channels = NULL;
4929         priv->ieee_rates = NULL;
4930         priv->band = IEEE80211_BAND_2GHZ;
4931
4932         priv->iw_mode = NL80211_IFTYPE_STATION;
4933
4934         iwl_reset_qos(priv);
4935
4936         priv->qos_data.qos_active = 0;
4937         priv->qos_data.qos_cap.val = 0;
4938
4939         priv->rates_mask = IWL_RATES_MASK;
4940         /* If power management is turned on, default to CAM mode */
4941         priv->power_mode = IWL_POWER_MODE_CAM;
4942         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
4943
4944         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
4945                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
4946                          eeprom->version);
4947                 ret = -EINVAL;
4948                 goto err;
4949         }
4950         ret = iwl_init_channel_map(priv);
4951         if (ret) {
4952                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
4953                 goto err;
4954         }
4955
4956         /* Set up txpower settings in driver for all channels */
4957         if (iwl3945_txpower_set_from_eeprom(priv)) {
4958                 ret = -EIO;
4959                 goto err_free_channel_map;
4960         }
4961
4962         ret = iwlcore_init_geos(priv);
4963         if (ret) {
4964                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
4965                 goto err_free_channel_map;
4966         }
4967         iwl3945_init_hw_rates(priv, priv->ieee_rates);
4968
4969         return 0;
4970
4971 err_free_channel_map:
4972         iwl_free_channel_map(priv);
4973 err:
4974         return ret;
4975 }
4976
4977 static int iwl3945_setup_mac(struct iwl_priv *priv)
4978 {
4979         int ret;
4980         struct ieee80211_hw *hw = priv->hw;
4981
4982         hw->rate_control_algorithm = "iwl-3945-rs";
4983         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
4984
4985         /* Tell mac80211 our characteristics */
4986         hw->flags = IEEE80211_HW_SIGNAL_DBM |
4987                     IEEE80211_HW_NOISE_DBM;
4988
4989         hw->wiphy->interface_modes =
4990                 BIT(NL80211_IFTYPE_STATION) |
4991                 BIT(NL80211_IFTYPE_ADHOC);
4992
4993         hw->wiphy->custom_regulatory = true;
4994
4995         /* Default value; 4 EDCA QOS priorities */
4996         hw->queues = 4;
4997
4998         hw->conf.beacon_int = 100;
4999
5000         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5001                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5002                         &priv->bands[IEEE80211_BAND_2GHZ];
5003
5004         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5005                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5006                         &priv->bands[IEEE80211_BAND_5GHZ];
5007
5008         ret = ieee80211_register_hw(priv->hw);
5009         if (ret) {
5010                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
5011                 return ret;
5012         }
5013         priv->mac80211_registered = 1;
5014
5015         return 0;
5016 }
5017
5018 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
5019 {
5020         int err = 0;
5021         struct iwl_priv *priv;
5022         struct ieee80211_hw *hw;
5023         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
5024         struct iwl3945_eeprom *eeprom;
5025         unsigned long flags;
5026
5027         /***********************
5028          * 1. Allocating HW data
5029          * ********************/
5030
5031         /* mac80211 allocates memory for this device instance, including
5032          *   space for this driver's private structure */
5033         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
5034         if (hw == NULL) {
5035                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
5036                 err = -ENOMEM;
5037                 goto out;
5038         }
5039         priv = hw->priv;
5040         SET_IEEE80211_DEV(hw, &pdev->dev);
5041
5042         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
5043              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
5044                 IWL_ERR(priv,
5045                         "invalid queues_num, should be between %d and %d\n",
5046                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
5047                 err = -EINVAL;
5048                 goto out_ieee80211_free_hw;
5049         }
5050
5051         /*
5052          * Disabling hardware scan means that mac80211 will perform scans
5053          * "the hard way", rather than using device's scan.
5054          */
5055         if (iwl3945_mod_params.disable_hw_scan) {
5056                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
5057                 iwl3945_hw_ops.hw_scan = NULL;
5058         }
5059
5060
5061         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
5062         priv->cfg = cfg;
5063         priv->pci_dev = pdev;
5064
5065 #ifdef CONFIG_IWLWIFI_DEBUG
5066         priv->debug_level = iwl3945_mod_params.debug;
5067         atomic_set(&priv->restrict_refcnt, 0);
5068 #endif
5069
5070         /***************************
5071          * 2. Initializing PCI bus
5072          * *************************/
5073         if (pci_enable_device(pdev)) {
5074                 err = -ENODEV;
5075                 goto out_ieee80211_free_hw;
5076         }
5077
5078         pci_set_master(pdev);
5079
5080         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
5081         if (!err)
5082                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
5083         if (err) {
5084                 IWL_WARN(priv, "No suitable DMA available.\n");
5085                 goto out_pci_disable_device;
5086         }
5087
5088         pci_set_drvdata(pdev, priv);
5089         err = pci_request_regions(pdev, DRV_NAME);
5090         if (err)
5091                 goto out_pci_disable_device;
5092
5093         /***********************
5094          * 3. Read REV Register
5095          * ********************/
5096         priv->hw_base = pci_iomap(pdev, 0, 0);
5097         if (!priv->hw_base) {
5098                 err = -ENODEV;
5099                 goto out_pci_release_regions;
5100         }
5101
5102         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
5103                         (unsigned long long) pci_resource_len(pdev, 0));
5104         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
5105
5106         /* We disable the RETRY_TIMEOUT register (0x41) to keep
5107          * PCI Tx retries from interfering with C3 CPU state */
5108         pci_write_config_byte(pdev, 0x41, 0x00);
5109
5110         /* amp init */
5111         err = priv->cfg->ops->lib->apm_ops.init(priv);
5112         if (err < 0) {
5113                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
5114                 goto out_iounmap;
5115         }
5116
5117         /***********************
5118          * 4. Read EEPROM
5119          * ********************/
5120
5121         /* Read the EEPROM */
5122         err = iwl_eeprom_init(priv);
5123         if (err) {
5124                 IWL_ERR(priv, "Unable to init EEPROM\n");
5125                 goto out_iounmap;
5126         }
5127         /* MAC Address location in EEPROM same for 3945/4965 */
5128         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
5129         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
5130         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
5131         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
5132
5133         /***********************
5134          * 5. Setup HW Constants
5135          * ********************/
5136         /* Device-specific setup */
5137         if (iwl3945_hw_set_hw_params(priv)) {
5138                 IWL_ERR(priv, "failed to set hw settings\n");
5139                 goto out_eeprom_free;
5140         }
5141
5142         /***********************
5143          * 6. Setup priv
5144          * ********************/
5145
5146         err = iwl3945_init_drv(priv);
5147         if (err) {
5148                 IWL_ERR(priv, "initializing driver failed\n");
5149                 goto out_unset_hw_params;
5150         }
5151
5152         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
5153                 priv->cfg->name);
5154
5155         /***********************************
5156          * 7. Initialize Module Parameters
5157          * **********************************/
5158
5159         /* Initialize module parameter values here */
5160         /* Disable radio (SW RF KILL) via parameter when loading driver */
5161         if (iwl3945_mod_params.disable) {
5162                 set_bit(STATUS_RF_KILL_SW, &priv->status);
5163                 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
5164         }
5165
5166
5167         /***********************
5168          * 8. Setup Services
5169          * ********************/
5170
5171         spin_lock_irqsave(&priv->lock, flags);
5172         iwl_disable_interrupts(priv);
5173         spin_unlock_irqrestore(&priv->lock, flags);
5174
5175         pci_enable_msi(priv->pci_dev);
5176
5177         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
5178                           DRV_NAME, priv);
5179         if (err) {
5180                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
5181                 goto out_disable_msi;
5182         }
5183
5184         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
5185         if (err) {
5186                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
5187                 goto out_release_irq;
5188         }
5189
5190         iwl_set_rxon_channel(priv,
5191                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
5192         iwl3945_setup_deferred_work(priv);
5193         iwl3945_setup_rx_handlers(priv);
5194
5195         /*********************************
5196          * 9. Setup and Register mac80211
5197          * *******************************/
5198
5199         iwl_enable_interrupts(priv);
5200
5201         err = iwl3945_setup_mac(priv);
5202         if (err)
5203                 goto  out_remove_sysfs;
5204
5205         err = iwl_rfkill_init(priv);
5206         if (err)
5207                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
5208                                   "Ignoring error: %d\n", err);
5209         else
5210                 iwl_rfkill_set_hw_state(priv);
5211
5212         /* Start monitoring the killswitch */
5213         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
5214                            2 * HZ);
5215
5216         return 0;
5217
5218  out_remove_sysfs:
5219         destroy_workqueue(priv->workqueue);
5220         priv->workqueue = NULL;
5221         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
5222  out_release_irq:
5223         free_irq(priv->pci_dev->irq, priv);
5224  out_disable_msi:
5225         pci_disable_msi(priv->pci_dev);
5226         iwlcore_free_geos(priv);
5227         iwl_free_channel_map(priv);
5228  out_unset_hw_params:
5229         iwl3945_unset_hw_params(priv);
5230  out_eeprom_free:
5231         iwl_eeprom_free(priv);
5232  out_iounmap:
5233         pci_iounmap(pdev, priv->hw_base);
5234  out_pci_release_regions:
5235         pci_release_regions(pdev);
5236  out_pci_disable_device:
5237         pci_set_drvdata(pdev, NULL);
5238         pci_disable_device(pdev);
5239  out_ieee80211_free_hw:
5240         ieee80211_free_hw(priv->hw);
5241  out:
5242         return err;
5243 }
5244
5245 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
5246 {
5247         struct iwl_priv *priv = pci_get_drvdata(pdev);
5248         unsigned long flags;
5249
5250         if (!priv)
5251                 return;
5252
5253         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
5254
5255         set_bit(STATUS_EXIT_PENDING, &priv->status);
5256
5257         if (priv->mac80211_registered) {
5258                 ieee80211_unregister_hw(priv->hw);
5259                 priv->mac80211_registered = 0;
5260         } else {
5261                 iwl3945_down(priv);
5262         }
5263
5264         /* make sure we flush any pending irq or
5265          * tasklet for the driver
5266          */
5267         spin_lock_irqsave(&priv->lock, flags);
5268         iwl_disable_interrupts(priv);
5269         spin_unlock_irqrestore(&priv->lock, flags);
5270
5271         iwl_synchronize_irq(priv);
5272
5273         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
5274
5275         iwl_rfkill_unregister(priv);
5276         cancel_delayed_work(&priv->rfkill_poll);
5277
5278         iwl3945_dealloc_ucode_pci(priv);
5279
5280         if (priv->rxq.bd)
5281                 iwl_rx_queue_free(priv, &priv->rxq);
5282         iwl3945_hw_txq_ctx_free(priv);
5283
5284         iwl3945_unset_hw_params(priv);
5285         iwl3945_clear_stations_table(priv);
5286
5287         /*netif_stop_queue(dev); */
5288         flush_workqueue(priv->workqueue);
5289
5290         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
5291          * priv->workqueue... so we can't take down the workqueue
5292          * until now... */
5293         destroy_workqueue(priv->workqueue);
5294         priv->workqueue = NULL;
5295
5296         free_irq(pdev->irq, priv);
5297         pci_disable_msi(pdev);
5298
5299         pci_iounmap(pdev, priv->hw_base);
5300         pci_release_regions(pdev);
5301         pci_disable_device(pdev);
5302         pci_set_drvdata(pdev, NULL);
5303
5304         iwl_free_channel_map(priv);
5305         iwlcore_free_geos(priv);
5306         kfree(priv->scan);
5307         if (priv->ibss_beacon)
5308                 dev_kfree_skb(priv->ibss_beacon);
5309
5310         ieee80211_free_hw(priv->hw);
5311 }
5312
5313 #ifdef CONFIG_PM
5314
5315 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
5316 {
5317         struct iwl_priv *priv = pci_get_drvdata(pdev);
5318
5319         if (priv->is_open) {
5320                 set_bit(STATUS_IN_SUSPEND, &priv->status);
5321                 iwl3945_mac_stop(priv->hw);
5322                 priv->is_open = 1;
5323         }
5324         pci_save_state(pdev);
5325         pci_disable_device(pdev);
5326         pci_set_power_state(pdev, PCI_D3hot);
5327
5328         return 0;
5329 }
5330
5331 static int iwl3945_pci_resume(struct pci_dev *pdev)
5332 {
5333         struct iwl_priv *priv = pci_get_drvdata(pdev);
5334         int ret;
5335
5336         pci_set_power_state(pdev, PCI_D0);
5337         ret = pci_enable_device(pdev);
5338         if (ret)
5339                 return ret;
5340         pci_restore_state(pdev);
5341
5342         if (priv->is_open)
5343                 iwl3945_mac_start(priv->hw);
5344
5345         clear_bit(STATUS_IN_SUSPEND, &priv->status);
5346         return 0;
5347 }
5348
5349 #endif /* CONFIG_PM */
5350
5351 /*****************************************************************************
5352  *
5353  * driver and module entry point
5354  *
5355  *****************************************************************************/
5356
5357 static struct pci_driver iwl3945_driver = {
5358         .name = DRV_NAME,
5359         .id_table = iwl3945_hw_card_ids,
5360         .probe = iwl3945_pci_probe,
5361         .remove = __devexit_p(iwl3945_pci_remove),
5362 #ifdef CONFIG_PM
5363         .suspend = iwl3945_pci_suspend,
5364         .resume = iwl3945_pci_resume,
5365 #endif
5366 };
5367
5368 static int __init iwl3945_init(void)
5369 {
5370
5371         int ret;
5372         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
5373         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
5374
5375         ret = iwl3945_rate_control_register();
5376         if (ret) {
5377                 printk(KERN_ERR DRV_NAME
5378                        "Unable to register rate control algorithm: %d\n", ret);
5379                 return ret;
5380         }
5381
5382         ret = pci_register_driver(&iwl3945_driver);
5383         if (ret) {
5384                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
5385                 goto error_register;
5386         }
5387
5388         return ret;
5389
5390 error_register:
5391         iwl3945_rate_control_unregister();
5392         return ret;
5393 }
5394
5395 static void __exit iwl3945_exit(void)
5396 {
5397         pci_unregister_driver(&iwl3945_driver);
5398         iwl3945_rate_control_unregister();
5399 }
5400
5401 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
5402
5403 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
5404 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
5405 module_param_named(disable, iwl3945_mod_params.disable, int, 0444);
5406 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
5407 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
5408 MODULE_PARM_DESC(swcrypto,
5409                  "using software crypto (default 1 [software])\n");
5410 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
5411 MODULE_PARM_DESC(debug, "debug output mask");
5412 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
5413 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
5414
5415 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
5416 MODULE_PARM_DESC(queues_num, "number of hw queues.");
5417
5418 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
5419 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
5420
5421 module_exit(iwl3945_exit);
5422 module_init(iwl3945_init);