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iwlwifi: remove bg_up work
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl3945-base.c
blob119da54116de696400fdf547df16af6bc4cbd716
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2010 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/sched.h>
37 #include <linux/skbuff.h>
38 #include <linux/netdevice.h>
39 #include <linux/wireless.h>
40 #include <linux/firmware.h>
41 #include <linux/etherdevice.h>
42 #include <linux/if_arp.h>
43
44 #include <net/ieee80211_radiotap.h>
45 #include <net/mac80211.h>
46
47 #include <asm/div64.h>
48
49 #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 #include "iwl-spectrum.h"
60
61 /*
62 * module name, copyright, version, etc.
63 */
64
65 #define DRV_DESCRIPTION \
66 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
67
68 #ifdef CONFIG_IWLWIFI_DEBUG
69 #define VD "d"
70 #else
71 #define VD
72 #endif
73
74 /*
75 * add "s" to indicate spectrum measurement included.
76 * we add it here to be consistent with previous releases in which
77 * this was configurable.
78 */
79 #define DRV_VERSION IWLWIFI_VERSION VD "s"
80 #define DRV_COPYRIGHT "Copyright(c) 2003-2010 Intel Corporation"
81 #define DRV_AUTHOR "<ilw@linux.intel.com>"
82
83 MODULE_DESCRIPTION(DRV_DESCRIPTION);
84 MODULE_VERSION(DRV_VERSION);
85 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
86 MODULE_LICENSE("GPL");
87
88 /* module parameters */
89 struct iwl_mod_params iwl3945_mod_params = {
90 .sw_crypto = 1,
91 .restart_fw = 1,
92 /* the rest are 0 by default */
93 };
94
95 /**
96 * iwl3945_get_antenna_flags - Get antenna flags for RXON command
97 * @priv: eeprom and antenna fields are used to determine antenna flags
98 *
99 * priv->eeprom39 is used to determine if antenna AUX/MAIN are reversed
100 * iwl3945_mod_params.antenna specifies the antenna diversity mode:
101 *
102 * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
103 * IWL_ANTENNA_MAIN - Force MAIN antenna
104 * IWL_ANTENNA_AUX - Force AUX antenna
105 */
106 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
107 {
108 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
109
110 switch (iwl3945_mod_params.antenna) {
111 case IWL_ANTENNA_DIVERSITY:
112 return 0;
113
114 case IWL_ANTENNA_MAIN:
115 if (eeprom->antenna_switch_type)
116 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
117 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
118
119 case IWL_ANTENNA_AUX:
120 if (eeprom->antenna_switch_type)
121 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
122 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
123 }
124
125 /* bad antenna selector value */
126 IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
127 iwl3945_mod_params.antenna);
128
129 return 0; /* "diversity" is default if error */
130 }
131
132 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
133 struct ieee80211_key_conf *keyconf,
134 u8 sta_id)
135 {
136 unsigned long flags;
137 __le16 key_flags = 0;
138 int ret;
139
140 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
141 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
142
143 if (sta_id == priv->hw_params.bcast_sta_id)
144 key_flags |= STA_KEY_MULTICAST_MSK;
145
146 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
147 keyconf->hw_key_idx = keyconf->keyidx;
148 key_flags &= ~STA_KEY_FLG_INVALID;
149
150 spin_lock_irqsave(&priv->sta_lock, flags);
151 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
152 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
153 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
154 keyconf->keylen);
155
156 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
157 keyconf->keylen);
158
159 if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
160 == STA_KEY_FLG_NO_ENC)
161 priv->stations[sta_id].sta.key.key_offset =
162 iwl_get_free_ucode_key_index(priv);
163 /* else, we are overriding an existing key => no need to allocated room
164 * in uCode. */
165
166 WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
167 "no space for a new key");
168
169 priv->stations[sta_id].sta.key.key_flags = key_flags;
170 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
171 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
172
173 IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
174
175 ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
176
177 spin_unlock_irqrestore(&priv->sta_lock, flags);
178
179 return ret;
180 }
181
182 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
183 struct ieee80211_key_conf *keyconf,
184 u8 sta_id)
185 {
186 return -EOPNOTSUPP;
187 }
188
189 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
190 struct ieee80211_key_conf *keyconf,
191 u8 sta_id)
192 {
193 return -EOPNOTSUPP;
194 }
195
196 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
197 {
198 unsigned long flags;
199
200 spin_lock_irqsave(&priv->sta_lock, flags);
201 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
202 memset(&priv->stations[sta_id].sta.key, 0,
203 sizeof(struct iwl4965_keyinfo));
204 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
205 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
206 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
207 spin_unlock_irqrestore(&priv->sta_lock, flags);
208
209 IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
210 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
211 return 0;
212 }
213
214 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
215 struct ieee80211_key_conf *keyconf, u8 sta_id)
216 {
217 int ret = 0;
218
219 keyconf->hw_key_idx = HW_KEY_DYNAMIC;
220
221 switch (keyconf->alg) {
222 case ALG_CCMP:
223 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
224 break;
225 case ALG_TKIP:
226 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
227 break;
228 case ALG_WEP:
229 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
230 break;
231 default:
232 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
233 ret = -EINVAL;
234 }
235
236 IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
237 keyconf->alg, keyconf->keylen, keyconf->keyidx,
238 sta_id, ret);
239
240 return ret;
241 }
242
243 static int iwl3945_remove_static_key(struct iwl_priv *priv)
244 {
245 int ret = -EOPNOTSUPP;
246
247 return ret;
248 }
249
250 static int iwl3945_set_static_key(struct iwl_priv *priv,
251 struct ieee80211_key_conf *key)
252 {
253 if (key->alg == ALG_WEP)
254 return -EOPNOTSUPP;
255
256 IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
257 return -EINVAL;
258 }
259
260 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
261 {
262 struct list_head *element;
263
264 IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
265 priv->frames_count);
266
267 while (!list_empty(&priv->free_frames)) {
268 element = priv->free_frames.next;
269 list_del(element);
270 kfree(list_entry(element, struct iwl3945_frame, list));
271 priv->frames_count--;
272 }
273
274 if (priv->frames_count) {
275 IWL_WARN(priv, "%d frames still in use. Did we lose one?\n",
276 priv->frames_count);
277 priv->frames_count = 0;
278 }
279 }
280
281 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
282 {
283 struct iwl3945_frame *frame;
284 struct list_head *element;
285 if (list_empty(&priv->free_frames)) {
286 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
287 if (!frame) {
288 IWL_ERR(priv, "Could not allocate frame!\n");
289 return NULL;
290 }
291
292 priv->frames_count++;
293 return frame;
294 }
295
296 element = priv->free_frames.next;
297 list_del(element);
298 return list_entry(element, struct iwl3945_frame, list);
299 }
300
301 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
302 {
303 memset(frame, 0, sizeof(*frame));
304 list_add(&frame->list, &priv->free_frames);
305 }
306
307 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
308 struct ieee80211_hdr *hdr,
309 int left)
310 {
311
312 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
313 ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
314 (priv->iw_mode != NL80211_IFTYPE_AP)))
315 return 0;
316
317 if (priv->ibss_beacon->len > left)
318 return 0;
319
320 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
321
322 return priv->ibss_beacon->len;
323 }
324
325 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
326 {
327 struct iwl3945_frame *frame;
328 unsigned int frame_size;
329 int rc;
330 u8 rate;
331
332 frame = iwl3945_get_free_frame(priv);
333
334 if (!frame) {
335 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
336 "command.\n");
337 return -ENOMEM;
338 }
339
340 rate = iwl_rate_get_lowest_plcp(priv);
341
342 frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
343
344 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
345 &frame->u.cmd[0]);
346
347 iwl3945_free_frame(priv, frame);
348
349 return rc;
350 }
351
352 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
353 {
354 if (priv->shared_virt)
355 pci_free_consistent(priv->pci_dev,
356 sizeof(struct iwl3945_shared),
357 priv->shared_virt,
358 priv->shared_phys);
359 }
360
361 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
362 struct ieee80211_tx_info *info,
363 struct iwl_device_cmd *cmd,
364 struct sk_buff *skb_frag,
365 int sta_id)
366 {
367 struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
368 struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
369
370 switch (keyinfo->alg) {
371 case ALG_CCMP:
372 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
373 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
374 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
375 break;
376
377 case ALG_TKIP:
378 break;
379
380 case ALG_WEP:
381 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
382 (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
383
384 if (keyinfo->keylen == 13)
385 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
386
387 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
388
389 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
390 "with key %d\n", info->control.hw_key->hw_key_idx);
391 break;
392
393 default:
394 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
395 break;
396 }
397 }
398
399 /*
400 * handle build REPLY_TX command notification.
401 */
402 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
403 struct iwl_device_cmd *cmd,
404 struct ieee80211_tx_info *info,
405 struct ieee80211_hdr *hdr, u8 std_id)
406 {
407 struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
408 __le32 tx_flags = tx_cmd->tx_flags;
409 __le16 fc = hdr->frame_control;
410
411 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
412 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
413 tx_flags |= TX_CMD_FLG_ACK_MSK;
414 if (ieee80211_is_mgmt(fc))
415 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
416 if (ieee80211_is_probe_resp(fc) &&
417 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
418 tx_flags |= TX_CMD_FLG_TSF_MSK;
419 } else {
420 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
421 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
422 }
423
424 tx_cmd->sta_id = std_id;
425 if (ieee80211_has_morefrags(fc))
426 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
427
428 if (ieee80211_is_data_qos(fc)) {
429 u8 *qc = ieee80211_get_qos_ctl(hdr);
430 tx_cmd->tid_tspec = qc[0] & 0xf;
431 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
432 } else {
433 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
434 }
435
436 priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
437
438 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
439 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
440
441 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
442 if (ieee80211_is_mgmt(fc)) {
443 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
444 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
445 else
446 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
447 } else {
448 tx_cmd->timeout.pm_frame_timeout = 0;
449 }
450
451 tx_cmd->driver_txop = 0;
452 tx_cmd->tx_flags = tx_flags;
453 tx_cmd->next_frame_len = 0;
454 }
455
456 /*
457 * start REPLY_TX command process
458 */
459 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
460 {
461 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
462 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
463 struct iwl3945_tx_cmd *tx_cmd;
464 struct iwl_tx_queue *txq = NULL;
465 struct iwl_queue *q = NULL;
466 struct iwl_device_cmd *out_cmd;
467 struct iwl_cmd_meta *out_meta;
468 dma_addr_t phys_addr;
469 dma_addr_t txcmd_phys;
470 int txq_id = skb_get_queue_mapping(skb);
471 u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
472 u8 id;
473 u8 unicast;
474 u8 sta_id;
475 u8 tid = 0;
476 u16 seq_number = 0;
477 __le16 fc;
478 u8 wait_write_ptr = 0;
479 u8 *qc = NULL;
480 unsigned long flags;
481 int rc;
482
483 spin_lock_irqsave(&priv->lock, flags);
484 if (iwl_is_rfkill(priv)) {
485 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
486 goto drop_unlock;
487 }
488
489 if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
490 IWL_ERR(priv, "ERROR: No TX rate available.\n");
491 goto drop_unlock;
492 }
493
494 unicast = !is_multicast_ether_addr(hdr->addr1);
495 id = 0;
496
497 fc = hdr->frame_control;
498
499 #ifdef CONFIG_IWLWIFI_DEBUG
500 if (ieee80211_is_auth(fc))
501 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
502 else if (ieee80211_is_assoc_req(fc))
503 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
504 else if (ieee80211_is_reassoc_req(fc))
505 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
506 #endif
507
508 /* drop all non-injected data frame if we are not associated */
509 if (ieee80211_is_data(fc) &&
510 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
511 (!iwl_is_associated(priv) ||
512 ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
513 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
514 goto drop_unlock;
515 }
516
517 spin_unlock_irqrestore(&priv->lock, flags);
518
519 hdr_len = ieee80211_hdrlen(fc);
520
521 /* Find (or create) index into station table for destination station */
522 if (info->flags & IEEE80211_TX_CTL_INJECTED)
523 sta_id = priv->hw_params.bcast_sta_id;
524 else
525 sta_id = iwl_get_sta_id(priv, hdr);
526 if (sta_id == IWL_INVALID_STATION) {
527 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
528 hdr->addr1);
529 goto drop;
530 }
531
532 IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
533
534 if (ieee80211_is_data_qos(fc)) {
535 qc = ieee80211_get_qos_ctl(hdr);
536 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
537 if (unlikely(tid >= MAX_TID_COUNT))
538 goto drop;
539 seq_number = priv->stations[sta_id].tid[tid].seq_number &
540 IEEE80211_SCTL_SEQ;
541 hdr->seq_ctrl = cpu_to_le16(seq_number) |
542 (hdr->seq_ctrl &
543 cpu_to_le16(IEEE80211_SCTL_FRAG));
544 seq_number += 0x10;
545 }
546
547 /* Descriptor for chosen Tx queue */
548 txq = &priv->txq[txq_id];
549 q = &txq->q;
550
551 if ((iwl_queue_space(q) < q->high_mark))
552 goto drop;
553
554 spin_lock_irqsave(&priv->lock, flags);
555
556 idx = get_cmd_index(q, q->write_ptr, 0);
557
558 /* Set up driver data for this TFD */
559 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
560 txq->txb[q->write_ptr].skb[0] = skb;
561
562 /* Init first empty entry in queue's array of Tx/cmd buffers */
563 out_cmd = txq->cmd[idx];
564 out_meta = &txq->meta[idx];
565 tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
566 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
567 memset(tx_cmd, 0, sizeof(*tx_cmd));
568
569 /*
570 * Set up the Tx-command (not MAC!) header.
571 * Store the chosen Tx queue and TFD index within the sequence field;
572 * after Tx, uCode's Tx response will return this value so driver can
573 * locate the frame within the tx queue and do post-tx processing.
574 */
575 out_cmd->hdr.cmd = REPLY_TX;
576 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
577 INDEX_TO_SEQ(q->write_ptr)));
578
579 /* Copy MAC header from skb into command buffer */
580 memcpy(tx_cmd->hdr, hdr, hdr_len);
581
582
583 if (info->control.hw_key)
584 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
585
586 /* TODO need this for burst mode later on */
587 iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
588
589 /* set is_hcca to 0; it probably will never be implemented */
590 iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
591
592 /* Total # bytes to be transmitted */
593 len = (u16)skb->len;
594 tx_cmd->len = cpu_to_le16(len);
595
596 iwl_dbg_log_tx_data_frame(priv, len, hdr);
597 iwl_update_stats(priv, true, fc, len);
598 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
599 tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
600
601 if (!ieee80211_has_morefrags(hdr->frame_control)) {
602 txq->need_update = 1;
603 if (qc)
604 priv->stations[sta_id].tid[tid].seq_number = seq_number;
605 } else {
606 wait_write_ptr = 1;
607 txq->need_update = 0;
608 }
609
610 IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
611 le16_to_cpu(out_cmd->hdr.sequence));
612 IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
613 iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
614 iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
615 ieee80211_hdrlen(fc));
616
617 /*
618 * Use the first empty entry in this queue's command buffer array
619 * to contain the Tx command and MAC header concatenated together
620 * (payload data will be in another buffer).
621 * Size of this varies, due to varying MAC header length.
622 * If end is not dword aligned, we'll have 2 extra bytes at the end
623 * of the MAC header (device reads on dword boundaries).
624 * We'll tell device about this padding later.
625 */
626 len = sizeof(struct iwl3945_tx_cmd) +
627 sizeof(struct iwl_cmd_header) + hdr_len;
628
629 len_org = len;
630 len = (len + 3) & ~3;
631
632 if (len_org != len)
633 len_org = 1;
634 else
635 len_org = 0;
636
637 /* Physical address of this Tx command's header (not MAC header!),
638 * within command buffer array. */
639 txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
640 len, PCI_DMA_TODEVICE);
641 /* we do not map meta data ... so we can safely access address to
642 * provide to unmap command*/
643 pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
644 pci_unmap_len_set(out_meta, len, len);
645
646 /* Add buffer containing Tx command and MAC(!) header to TFD's
647 * first entry */
648 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
649 txcmd_phys, len, 1, 0);
650
651
652 /* Set up TFD's 2nd entry to point directly to remainder of skb,
653 * if any (802.11 null frames have no payload). */
654 len = skb->len - hdr_len;
655 if (len) {
656 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
657 len, PCI_DMA_TODEVICE);
658 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
659 phys_addr, len,
660 0, U32_PAD(len));
661 }
662
663
664 /* Tell device the write index *just past* this latest filled TFD */
665 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
666 rc = iwl_txq_update_write_ptr(priv, txq);
667 spin_unlock_irqrestore(&priv->lock, flags);
668
669 if (rc)
670 return rc;
671
672 if ((iwl_queue_space(q) < q->high_mark)
673 && priv->mac80211_registered) {
674 if (wait_write_ptr) {
675 spin_lock_irqsave(&priv->lock, flags);
676 txq->need_update = 1;
677 iwl_txq_update_write_ptr(priv, txq);
678 spin_unlock_irqrestore(&priv->lock, flags);
679 }
680
681 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
682 }
683
684 return 0;
685
686 drop_unlock:
687 spin_unlock_irqrestore(&priv->lock, flags);
688 drop:
689 return -1;
690 }
691
692 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
693 #define BEACON_TIME_MASK_HIGH 0xFF000000
694 #define TIME_UNIT 1024
695
696 /*
697 * extended beacon time format
698 * time in usec will be changed into a 32-bit value in 8:24 format
699 * the high 1 byte is the beacon counts
700 * the lower 3 bytes is the time in usec within one beacon interval
701 */
702
703 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
704 {
705 u32 quot;
706 u32 rem;
707 u32 interval = beacon_interval * 1024;
708
709 if (!interval || !usec)
710 return 0;
711
712 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
713 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
714
715 return (quot << 24) + rem;
716 }
717
718 /* base is usually what we get from ucode with each received frame,
719 * the same as HW timer counter counting down
720 */
721
722 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
723 {
724 u32 base_low = base & BEACON_TIME_MASK_LOW;
725 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
726 u32 interval = beacon_interval * TIME_UNIT;
727 u32 res = (base & BEACON_TIME_MASK_HIGH) +
728 (addon & BEACON_TIME_MASK_HIGH);
729
730 if (base_low > addon_low)
731 res += base_low - addon_low;
732 else if (base_low < addon_low) {
733 res += interval + base_low - addon_low;
734 res += (1 << 24);
735 } else
736 res += (1 << 24);
737
738 return cpu_to_le32(res);
739 }
740
741 static int iwl3945_get_measurement(struct iwl_priv *priv,
742 struct ieee80211_measurement_params *params,
743 u8 type)
744 {
745 struct iwl_spectrum_cmd spectrum;
746 struct iwl_rx_packet *pkt;
747 struct iwl_host_cmd cmd = {
748 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
749 .data = (void *)&spectrum,
750 .flags = CMD_WANT_SKB,
751 };
752 u32 add_time = le64_to_cpu(params->start_time);
753 int rc;
754 int spectrum_resp_status;
755 int duration = le16_to_cpu(params->duration);
756
757 if (iwl_is_associated(priv))
758 add_time =
759 iwl3945_usecs_to_beacons(
760 le64_to_cpu(params->start_time) - priv->last_tsf,
761 le16_to_cpu(priv->rxon_timing.beacon_interval));
762
763 memset(&spectrum, 0, sizeof(spectrum));
764
765 spectrum.channel_count = cpu_to_le16(1);
766 spectrum.flags =
767 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
768 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
769 cmd.len = sizeof(spectrum);
770 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
771
772 if (iwl_is_associated(priv))
773 spectrum.start_time =
774 iwl3945_add_beacon_time(priv->last_beacon_time,
775 add_time,
776 le16_to_cpu(priv->rxon_timing.beacon_interval));
777 else
778 spectrum.start_time = 0;
779
780 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
781 spectrum.channels[0].channel = params->channel;
782 spectrum.channels[0].type = type;
783 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
784 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
785 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
786
787 rc = iwl_send_cmd_sync(priv, &cmd);
788 if (rc)
789 return rc;
790
791 pkt = (struct iwl_rx_packet *)cmd.reply_page;
792 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
793 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
794 rc = -EIO;
795 }
796
797 spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
798 switch (spectrum_resp_status) {
799 case 0: /* Command will be handled */
800 if (pkt->u.spectrum.id != 0xff) {
801 IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
802 pkt->u.spectrum.id);
803 priv->measurement_status &= ~MEASUREMENT_READY;
804 }
805 priv->measurement_status |= MEASUREMENT_ACTIVE;
806 rc = 0;
807 break;
808
809 case 1: /* Command will not be handled */
810 rc = -EAGAIN;
811 break;
812 }
813
814 iwl_free_pages(priv, cmd.reply_page);
815
816 return rc;
817 }
818
819 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
820 struct iwl_rx_mem_buffer *rxb)
821 {
822 struct iwl_rx_packet *pkt = rxb_addr(rxb);
823 struct iwl_alive_resp *palive;
824 struct delayed_work *pwork;
825
826 palive = &pkt->u.alive_frame;
827
828 IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
829 "0x%01X 0x%01X\n",
830 palive->is_valid, palive->ver_type,
831 palive->ver_subtype);
832
833 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
834 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
835 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
836 sizeof(struct iwl_alive_resp));
837 pwork = &priv->init_alive_start;
838 } else {
839 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
840 memcpy(&priv->card_alive, &pkt->u.alive_frame,
841 sizeof(struct iwl_alive_resp));
842 pwork = &priv->alive_start;
843 iwl3945_disable_events(priv);
844 }
845
846 /* We delay the ALIVE response by 5ms to
847 * give the HW RF Kill time to activate... */
848 if (palive->is_valid == UCODE_VALID_OK)
849 queue_delayed_work(priv->workqueue, pwork,
850 msecs_to_jiffies(5));
851 else
852 IWL_WARN(priv, "uCode did not respond OK.\n");
853 }
854
855 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
856 struct iwl_rx_mem_buffer *rxb)
857 {
858 #ifdef CONFIG_IWLWIFI_DEBUG
859 struct iwl_rx_packet *pkt = rxb_addr(rxb);
860 #endif
861
862 IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
863 return;
864 }
865
866 static void iwl3945_bg_beacon_update(struct work_struct *work)
867 {
868 struct iwl_priv *priv =
869 container_of(work, struct iwl_priv, beacon_update);
870 struct sk_buff *beacon;
871
872 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
873 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
874
875 if (!beacon) {
876 IWL_ERR(priv, "update beacon failed\n");
877 return;
878 }
879
880 mutex_lock(&priv->mutex);
881 /* new beacon skb is allocated every time; dispose previous.*/
882 if (priv->ibss_beacon)
883 dev_kfree_skb(priv->ibss_beacon);
884
885 priv->ibss_beacon = beacon;
886 mutex_unlock(&priv->mutex);
887
888 iwl3945_send_beacon_cmd(priv);
889 }
890
891 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
892 struct iwl_rx_mem_buffer *rxb)
893 {
894 #ifdef CONFIG_IWLWIFI_DEBUG
895 struct iwl_rx_packet *pkt = rxb_addr(rxb);
896 struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
897 u8 rate = beacon->beacon_notify_hdr.rate;
898
899 IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
900 "tsf %d %d rate %d\n",
901 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
902 beacon->beacon_notify_hdr.failure_frame,
903 le32_to_cpu(beacon->ibss_mgr_status),
904 le32_to_cpu(beacon->high_tsf),
905 le32_to_cpu(beacon->low_tsf), rate);
906 #endif
907
908 if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
909 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
910 queue_work(priv->workqueue, &priv->beacon_update);
911 }
912
913 /* Handle notification from uCode that card's power state is changing
914 * due to software, hardware, or critical temperature RFKILL */
915 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
916 struct iwl_rx_mem_buffer *rxb)
917 {
918 struct iwl_rx_packet *pkt = rxb_addr(rxb);
919 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
920 unsigned long status = priv->status;
921
922 IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
923 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
924 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
925
926 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
927 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
928
929 if (flags & HW_CARD_DISABLED)
930 set_bit(STATUS_RF_KILL_HW, &priv->status);
931 else
932 clear_bit(STATUS_RF_KILL_HW, &priv->status);
933
934
935 iwl_scan_cancel(priv);
936
937 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
938 test_bit(STATUS_RF_KILL_HW, &priv->status)))
939 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
940 test_bit(STATUS_RF_KILL_HW, &priv->status));
941 else
942 wake_up_interruptible(&priv->wait_command_queue);
943 }
944
945 /**
946 * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
947 *
948 * Setup the RX handlers for each of the reply types sent from the uCode
949 * to the host.
950 *
951 * This function chains into the hardware specific files for them to setup
952 * any hardware specific handlers as well.
953 */
954 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
955 {
956 priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
957 priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
958 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
959 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
960 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
961 iwl_rx_spectrum_measure_notif;
962 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
963 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
964 iwl_rx_pm_debug_statistics_notif;
965 priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
966
967 /*
968 * The same handler is used for both the REPLY to a discrete
969 * statistics request from the host as well as for the periodic
970 * statistics notifications (after received beacons) from the uCode.
971 */
972 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
973 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
974
975 iwl_setup_rx_scan_handlers(priv);
976 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
977
978 /* Set up hardware specific Rx handlers */
979 iwl3945_hw_rx_handler_setup(priv);
980 }
981
982 /************************** RX-FUNCTIONS ****************************/
983 /*
984 * Rx theory of operation
985 *
986 * The host allocates 32 DMA target addresses and passes the host address
987 * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
988 * 0 to 31
989 *
990 * Rx Queue Indexes
991 * The host/firmware share two index registers for managing the Rx buffers.
992 *
993 * The READ index maps to the first position that the firmware may be writing
994 * to -- the driver can read up to (but not including) this position and get
995 * good data.
996 * The READ index is managed by the firmware once the card is enabled.
997 *
998 * The WRITE index maps to the last position the driver has read from -- the
999 * position preceding WRITE is the last slot the firmware can place a packet.
1000 *
1001 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1002 * WRITE = READ.
1003 *
1004 * During initialization, the host sets up the READ queue position to the first
1005 * INDEX position, and WRITE to the last (READ - 1 wrapped)
1006 *
1007 * When the firmware places a packet in a buffer, it will advance the READ index
1008 * and fire the RX interrupt. The driver can then query the READ index and
1009 * process as many packets as possible, moving the WRITE index forward as it
1010 * resets the Rx queue buffers with new memory.
1011 *
1012 * The management in the driver is as follows:
1013 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
1014 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1015 * to replenish the iwl->rxq->rx_free.
1016 * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1017 * iwl->rxq is replenished and the READ INDEX is updated (updating the
1018 * 'processed' and 'read' driver indexes as well)
1019 * + A received packet is processed and handed to the kernel network stack,
1020 * detached from the iwl->rxq. The driver 'processed' index is updated.
1021 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1022 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1023 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
1024 * were enough free buffers and RX_STALLED is set it is cleared.
1025 *
1026 *
1027 * Driver sequence:
1028 *
1029 * iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls
1030 * iwl3945_rx_queue_restock
1031 * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1032 * queue, updates firmware pointers, and updates
1033 * the WRITE index. If insufficient rx_free buffers
1034 * are available, schedules iwl3945_rx_replenish
1035 *
1036 * -- enable interrupts --
1037 * ISR - iwl3945_rx() Detach iwl_rx_mem_buffers from pool up to the
1038 * READ INDEX, detaching the SKB from the pool.
1039 * Moves the packet buffer from queue to rx_used.
1040 * Calls iwl3945_rx_queue_restock to refill any empty
1041 * slots.
1042 * ...
1043 *
1044 */
1045
1046 /**
1047 * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1048 */
1049 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1050 dma_addr_t dma_addr)
1051 {
1052 return cpu_to_le32((u32)dma_addr);
1053 }
1054
1055 /**
1056 * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1057 *
1058 * If there are slots in the RX queue that need to be restocked,
1059 * and we have free pre-allocated buffers, fill the ranks as much
1060 * as we can, pulling from rx_free.
1061 *
1062 * This moves the 'write' index forward to catch up with 'processed', and
1063 * also updates the memory address in the firmware to reference the new
1064 * target buffer.
1065 */
1066 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1067 {
1068 struct iwl_rx_queue *rxq = &priv->rxq;
1069 struct list_head *element;
1070 struct iwl_rx_mem_buffer *rxb;
1071 unsigned long flags;
1072 int write, rc;
1073
1074 spin_lock_irqsave(&rxq->lock, flags);
1075 write = rxq->write & ~0x7;
1076 while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1077 /* Get next free Rx buffer, remove from free list */
1078 element = rxq->rx_free.next;
1079 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1080 list_del(element);
1081
1082 /* Point to Rx buffer via next RBD in circular buffer */
1083 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1084 rxq->queue[rxq->write] = rxb;
1085 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1086 rxq->free_count--;
1087 }
1088 spin_unlock_irqrestore(&rxq->lock, flags);
1089 /* If the pre-allocated buffer pool is dropping low, schedule to
1090 * refill it */
1091 if (rxq->free_count <= RX_LOW_WATERMARK)
1092 queue_work(priv->workqueue, &priv->rx_replenish);
1093
1094
1095 /* If we've added more space for the firmware to place data, tell it.
1096 * Increment device's write pointer in multiples of 8. */
1097 if ((rxq->write_actual != (rxq->write & ~0x7))
1098 || (abs(rxq->write - rxq->read) > 7)) {
1099 spin_lock_irqsave(&rxq->lock, flags);
1100 rxq->need_update = 1;
1101 spin_unlock_irqrestore(&rxq->lock, flags);
1102 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1103 if (rc)
1104 return rc;
1105 }
1106
1107 return 0;
1108 }
1109
1110 /**
1111 * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1112 *
1113 * When moving to rx_free an SKB is allocated for the slot.
1114 *
1115 * Also restock the Rx queue via iwl3945_rx_queue_restock.
1116 * This is called as a scheduled work item (except for during initialization)
1117 */
1118 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1119 {
1120 struct iwl_rx_queue *rxq = &priv->rxq;
1121 struct list_head *element;
1122 struct iwl_rx_mem_buffer *rxb;
1123 struct page *page;
1124 unsigned long flags;
1125 gfp_t gfp_mask = priority;
1126
1127 while (1) {
1128 spin_lock_irqsave(&rxq->lock, flags);
1129
1130 if (list_empty(&rxq->rx_used)) {
1131 spin_unlock_irqrestore(&rxq->lock, flags);
1132 return;
1133 }
1134 spin_unlock_irqrestore(&rxq->lock, flags);
1135
1136 if (rxq->free_count > RX_LOW_WATERMARK)
1137 gfp_mask |= __GFP_NOWARN;
1138
1139 if (priv->hw_params.rx_page_order > 0)
1140 gfp_mask |= __GFP_COMP;
1141
1142 /* Alloc a new receive buffer */
1143 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1144 if (!page) {
1145 if (net_ratelimit())
1146 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1147 if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1148 net_ratelimit())
1149 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1150 priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
1151 rxq->free_count);
1152 /* We don't reschedule replenish work here -- we will
1153 * call the restock method and if it still needs
1154 * more buffers it will schedule replenish */
1155 break;
1156 }
1157
1158 spin_lock_irqsave(&rxq->lock, flags);
1159 if (list_empty(&rxq->rx_used)) {
1160 spin_unlock_irqrestore(&rxq->lock, flags);
1161 __free_pages(page, priv->hw_params.rx_page_order);
1162 return;
1163 }
1164 element = rxq->rx_used.next;
1165 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1166 list_del(element);
1167 spin_unlock_irqrestore(&rxq->lock, flags);
1168
1169 rxb->page = page;
1170 /* Get physical address of RB/SKB */
1171 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1172 PAGE_SIZE << priv->hw_params.rx_page_order,
1173 PCI_DMA_FROMDEVICE);
1174
1175 spin_lock_irqsave(&rxq->lock, flags);
1176
1177 list_add_tail(&rxb->list, &rxq->rx_free);
1178 rxq->free_count++;
1179 priv->alloc_rxb_page++;
1180
1181 spin_unlock_irqrestore(&rxq->lock, flags);
1182 }
1183 }
1184
1185 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1186 {
1187 unsigned long flags;
1188 int i;
1189 spin_lock_irqsave(&rxq->lock, flags);
1190 INIT_LIST_HEAD(&rxq->rx_free);
1191 INIT_LIST_HEAD(&rxq->rx_used);
1192 /* Fill the rx_used queue with _all_ of the Rx buffers */
1193 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1194 /* In the reset function, these buffers may have been allocated
1195 * to an SKB, so we need to unmap and free potential storage */
1196 if (rxq->pool[i].page != NULL) {
1197 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1198 PAGE_SIZE << priv->hw_params.rx_page_order,
1199 PCI_DMA_FROMDEVICE);
1200 __iwl_free_pages(priv, rxq->pool[i].page);
1201 rxq->pool[i].page = NULL;
1202 }
1203 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1204 }
1205
1206 /* Set us so that we have processed and used all buffers, but have
1207 * not restocked the Rx queue with fresh buffers */
1208 rxq->read = rxq->write = 0;
1209 rxq->write_actual = 0;
1210 rxq->free_count = 0;
1211 spin_unlock_irqrestore(&rxq->lock, flags);
1212 }
1213
1214 void iwl3945_rx_replenish(void *data)
1215 {
1216 struct iwl_priv *priv = data;
1217 unsigned long flags;
1218
1219 iwl3945_rx_allocate(priv, GFP_KERNEL);
1220
1221 spin_lock_irqsave(&priv->lock, flags);
1222 iwl3945_rx_queue_restock(priv);
1223 spin_unlock_irqrestore(&priv->lock, flags);
1224 }
1225
1226 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1227 {
1228 iwl3945_rx_allocate(priv, GFP_ATOMIC);
1229
1230 iwl3945_rx_queue_restock(priv);
1231 }
1232
1233
1234 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1235 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1236 * This free routine walks the list of POOL entries and if SKB is set to
1237 * non NULL it is unmapped and freed
1238 */
1239 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1240 {
1241 int i;
1242 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1243 if (rxq->pool[i].page != NULL) {
1244 pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1245 PAGE_SIZE << priv->hw_params.rx_page_order,
1246 PCI_DMA_FROMDEVICE);
1247 __iwl_free_pages(priv, rxq->pool[i].page);
1248 rxq->pool[i].page = NULL;
1249 }
1250 }
1251
1252 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1253 rxq->dma_addr);
1254 pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1255 rxq->rb_stts, rxq->rb_stts_dma);
1256 rxq->bd = NULL;
1257 rxq->rb_stts = NULL;
1258 }
1259
1260
1261 /* Convert linear signal-to-noise ratio into dB */
1262 static u8 ratio2dB[100] = {
1263 /* 0 1 2 3 4 5 6 7 8 9 */
1264 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1265 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1266 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1267 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1268 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1269 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1270 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1271 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1272 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1273 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
1274 };
1275
1276 /* Calculates a relative dB value from a ratio of linear
1277 * (i.e. not dB) signal levels.
1278 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1279 int iwl3945_calc_db_from_ratio(int sig_ratio)
1280 {
1281 /* 1000:1 or higher just report as 60 dB */
1282 if (sig_ratio >= 1000)
1283 return 60;
1284
1285 /* 100:1 or higher, divide by 10 and use table,
1286 * add 20 dB to make up for divide by 10 */
1287 if (sig_ratio >= 100)
1288 return 20 + (int)ratio2dB[sig_ratio/10];
1289
1290 /* We shouldn't see this */
1291 if (sig_ratio < 1)
1292 return 0;
1293
1294 /* Use table for ratios 1:1 - 99:1 */
1295 return (int)ratio2dB[sig_ratio];
1296 }
1297
1298 /**
1299 * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1300 *
1301 * Uses the priv->rx_handlers callback function array to invoke
1302 * the appropriate handlers, including command responses,
1303 * frame-received notifications, and other notifications.
1304 */
1305 static void iwl3945_rx_handle(struct iwl_priv *priv)
1306 {
1307 struct iwl_rx_mem_buffer *rxb;
1308 struct iwl_rx_packet *pkt;
1309 struct iwl_rx_queue *rxq = &priv->rxq;
1310 u32 r, i;
1311 int reclaim;
1312 unsigned long flags;
1313 u8 fill_rx = 0;
1314 u32 count = 8;
1315 int total_empty = 0;
1316
1317 /* uCode's read index (stored in shared DRAM) indicates the last Rx
1318 * buffer that the driver may process (last buffer filled by ucode). */
1319 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1320 i = rxq->read;
1321
1322 /* calculate total frames need to be restock after handling RX */
1323 total_empty = r - rxq->write_actual;
1324 if (total_empty < 0)
1325 total_empty += RX_QUEUE_SIZE;
1326
1327 if (total_empty > (RX_QUEUE_SIZE / 2))
1328 fill_rx = 1;
1329 /* Rx interrupt, but nothing sent from uCode */
1330 if (i == r)
1331 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1332
1333 while (i != r) {
1334 rxb = rxq->queue[i];
1335
1336 /* If an RXB doesn't have a Rx queue slot associated with it,
1337 * then a bug has been introduced in the queue refilling
1338 * routines -- catch it here */
1339 BUG_ON(rxb == NULL);
1340
1341 rxq->queue[i] = NULL;
1342
1343 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1344 PAGE_SIZE << priv->hw_params.rx_page_order,
1345 PCI_DMA_FROMDEVICE);
1346 pkt = rxb_addr(rxb);
1347
1348 trace_iwlwifi_dev_rx(priv, pkt,
1349 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1350
1351 /* Reclaim a command buffer only if this packet is a response
1352 * to a (driver-originated) command.
1353 * If the packet (e.g. Rx frame) originated from uCode,
1354 * there is no command buffer to reclaim.
1355 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1356 * but apparently a few don't get set; catch them here. */
1357 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1358 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1359 (pkt->hdr.cmd != REPLY_TX);
1360
1361 /* Based on type of command response or notification,
1362 * handle those that need handling via function in
1363 * rx_handlers table. See iwl3945_setup_rx_handlers() */
1364 if (priv->rx_handlers[pkt->hdr.cmd]) {
1365 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1366 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1367 priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1368 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1369 } else {
1370 /* No handling needed */
1371 IWL_DEBUG_RX(priv,
1372 "r %d i %d No handler needed for %s, 0x%02x\n",
1373 r, i, get_cmd_string(pkt->hdr.cmd),
1374 pkt->hdr.cmd);
1375 }
1376
1377 /*
1378 * XXX: After here, we should always check rxb->page
1379 * against NULL before touching it or its virtual
1380 * memory (pkt). Because some rx_handler might have
1381 * already taken or freed the pages.
1382 */
1383
1384 if (reclaim) {
1385 /* Invoke any callbacks, transfer the buffer to caller,
1386 * and fire off the (possibly) blocking iwl_send_cmd()
1387 * as we reclaim the driver command queue */
1388 if (rxb->page)
1389 iwl_tx_cmd_complete(priv, rxb);
1390 else
1391 IWL_WARN(priv, "Claim null rxb?\n");
1392 }
1393
1394 /* Reuse the page if possible. For notification packets and
1395 * SKBs that fail to Rx correctly, add them back into the
1396 * rx_free list for reuse later. */
1397 spin_lock_irqsave(&rxq->lock, flags);
1398 if (rxb->page != NULL) {
1399 rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1400 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1401 PCI_DMA_FROMDEVICE);
1402 list_add_tail(&rxb->list, &rxq->rx_free);
1403 rxq->free_count++;
1404 } else
1405 list_add_tail(&rxb->list, &rxq->rx_used);
1406
1407 spin_unlock_irqrestore(&rxq->lock, flags);
1408
1409 i = (i + 1) & RX_QUEUE_MASK;
1410 /* If there are a lot of unused frames,
1411 * restock the Rx queue so ucode won't assert. */
1412 if (fill_rx) {
1413 count++;
1414 if (count >= 8) {
1415 rxq->read = i;
1416 iwl3945_rx_replenish_now(priv);
1417 count = 0;
1418 }
1419 }
1420 }
1421
1422 /* Backtrack one entry */
1423 rxq->read = i;
1424 if (fill_rx)
1425 iwl3945_rx_replenish_now(priv);
1426 else
1427 iwl3945_rx_queue_restock(priv);
1428 }
1429
1430 /* call this function to flush any scheduled tasklet */
1431 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1432 {
1433 /* wait to make sure we flush pending tasklet*/
1434 synchronize_irq(priv->pci_dev->irq);
1435 tasklet_kill(&priv->irq_tasklet);
1436 }
1437
1438 static const char *desc_lookup(int i)
1439 {
1440 switch (i) {
1441 case 1:
1442 return "FAIL";
1443 case 2:
1444 return "BAD_PARAM";
1445 case 3:
1446 return "BAD_CHECKSUM";
1447 case 4:
1448 return "NMI_INTERRUPT";
1449 case 5:
1450 return "SYSASSERT";
1451 case 6:
1452 return "FATAL_ERROR";
1453 }
1454
1455 return "UNKNOWN";
1456 }
1457
1458 #define ERROR_START_OFFSET (1 * sizeof(u32))
1459 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
1460
1461 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1462 {
1463 u32 i;
1464 u32 desc, time, count, base, data1;
1465 u32 blink1, blink2, ilink1, ilink2;
1466
1467 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1468
1469 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1470 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1471 return;
1472 }
1473
1474
1475 count = iwl_read_targ_mem(priv, base);
1476
1477 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1478 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1479 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1480 priv->status, count);
1481 }
1482
1483 IWL_ERR(priv, "Desc Time asrtPC blink2 "
1484 "ilink1 nmiPC Line\n");
1485 for (i = ERROR_START_OFFSET;
1486 i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1487 i += ERROR_ELEM_SIZE) {
1488 desc = iwl_read_targ_mem(priv, base + i);
1489 time =
1490 iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1491 blink1 =
1492 iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1493 blink2 =
1494 iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1495 ilink1 =
1496 iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1497 ilink2 =
1498 iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1499 data1 =
1500 iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1501
1502 IWL_ERR(priv,
1503 "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1504 desc_lookup(desc), desc, time, blink1, blink2,
1505 ilink1, ilink2, data1);
1506 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1507 0, blink1, blink2, ilink1, ilink2);
1508 }
1509 }
1510
1511 #define EVENT_START_OFFSET (6 * sizeof(u32))
1512
1513 /**
1514 * iwl3945_print_event_log - Dump error event log to syslog
1515 *
1516 */
1517 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1518 u32 num_events, u32 mode,
1519 int pos, char **buf, size_t bufsz)
1520 {
1521 u32 i;
1522 u32 base; /* SRAM byte address of event log header */
1523 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1524 u32 ptr; /* SRAM byte address of log data */
1525 u32 ev, time, data; /* event log data */
1526 unsigned long reg_flags;
1527
1528 if (num_events == 0)
1529 return pos;
1530
1531 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1532
1533 if (mode == 0)
1534 event_size = 2 * sizeof(u32);
1535 else
1536 event_size = 3 * sizeof(u32);
1537
1538 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1539
1540 /* Make sure device is powered up for SRAM reads */
1541 spin_lock_irqsave(&priv->reg_lock, reg_flags);
1542 iwl_grab_nic_access(priv);
1543
1544 /* Set starting address; reads will auto-increment */
1545 _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1546 rmb();
1547
1548 /* "time" is actually "data" for mode 0 (no timestamp).
1549 * place event id # at far right for easier visual parsing. */
1550 for (i = 0; i < num_events; i++) {
1551 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1552 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1553 if (mode == 0) {
1554 /* data, ev */
1555 if (bufsz) {
1556 pos += scnprintf(*buf + pos, bufsz - pos,
1557 "0x%08x:%04u\n",
1558 time, ev);
1559 } else {
1560 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1561 trace_iwlwifi_dev_ucode_event(priv, 0,
1562 time, ev);
1563 }
1564 } else {
1565 data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1566 if (bufsz) {
1567 pos += scnprintf(*buf + pos, bufsz - pos,
1568 "%010u:0x%08x:%04u\n",
1569 time, data, ev);
1570 } else {
1571 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1572 time, data, ev);
1573 trace_iwlwifi_dev_ucode_event(priv, time,
1574 data, ev);
1575 }
1576 }
1577 }
1578
1579 /* Allow device to power down */
1580 iwl_release_nic_access(priv);
1581 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1582 return pos;
1583 }
1584
1585 /**
1586 * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1587 */
1588 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1589 u32 num_wraps, u32 next_entry,
1590 u32 size, u32 mode,
1591 int pos, char **buf, size_t bufsz)
1592 {
1593 /*
1594 * display the newest DEFAULT_LOG_ENTRIES entries
1595 * i.e the entries just before the next ont that uCode would fill.
1596 */
1597 if (num_wraps) {
1598 if (next_entry < size) {
1599 pos = iwl3945_print_event_log(priv,
1600 capacity - (size - next_entry),
1601 size - next_entry, mode,
1602 pos, buf, bufsz);
1603 pos = iwl3945_print_event_log(priv, 0,
1604 next_entry, mode,
1605 pos, buf, bufsz);
1606 } else
1607 pos = iwl3945_print_event_log(priv, next_entry - size,
1608 size, mode,
1609 pos, buf, bufsz);
1610 } else {
1611 if (next_entry < size)
1612 pos = iwl3945_print_event_log(priv, 0,
1613 next_entry, mode,
1614 pos, buf, bufsz);
1615 else
1616 pos = iwl3945_print_event_log(priv, next_entry - size,
1617 size, mode,
1618 pos, buf, bufsz);
1619 }
1620 return pos;
1621 }
1622
1623 /* For sanity check only. Actual size is determined by uCode, typ. 512 */
1624 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1625
1626 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1627
1628 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1629 char **buf, bool display)
1630 {
1631 u32 base; /* SRAM byte address of event log header */
1632 u32 capacity; /* event log capacity in # entries */
1633 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
1634 u32 num_wraps; /* # times uCode wrapped to top of log */
1635 u32 next_entry; /* index of next entry to be written by uCode */
1636 u32 size; /* # entries that we'll print */
1637 int pos = 0;
1638 size_t bufsz = 0;
1639
1640 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1641 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1642 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1643 return -EINVAL;
1644 }
1645
1646 /* event log header */
1647 capacity = iwl_read_targ_mem(priv, base);
1648 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1649 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1650 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1651
1652 if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1653 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1654 capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1655 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1656 }
1657
1658 if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1659 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1660 next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1661 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1662 }
1663
1664 size = num_wraps ? capacity : next_entry;
1665
1666 /* bail out if nothing in log */
1667 if (size == 0) {
1668 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1669 return pos;
1670 }
1671
1672 #ifdef CONFIG_IWLWIFI_DEBUG
1673 if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1674 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1675 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1676 #else
1677 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1678 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1679 #endif
1680
1681 IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1682 size);
1683
1684 #ifdef CONFIG_IWLWIFI_DEBUG
1685 if (display) {
1686 if (full_log)
1687 bufsz = capacity * 48;
1688 else
1689 bufsz = size * 48;
1690 *buf = kmalloc(bufsz, GFP_KERNEL);
1691 if (!*buf)
1692 return -ENOMEM;
1693 }
1694 if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1695 /* if uCode has wrapped back to top of log,
1696 * start at the oldest entry,
1697 * i.e the next one that uCode would fill.
1698 */
1699 if (num_wraps)
1700 pos = iwl3945_print_event_log(priv, next_entry,
1701 capacity - next_entry, mode,
1702 pos, buf, bufsz);
1703
1704 /* (then/else) start at top of log */
1705 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1706 pos, buf, bufsz);
1707 } else
1708 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1709 next_entry, size, mode,
1710 pos, buf, bufsz);
1711 #else
1712 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1713 next_entry, size, mode,
1714 pos, buf, bufsz);
1715 #endif
1716 return pos;
1717 }
1718
1719 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1720 {
1721 u32 inta, handled = 0;
1722 u32 inta_fh;
1723 unsigned long flags;
1724 #ifdef CONFIG_IWLWIFI_DEBUG
1725 u32 inta_mask;
1726 #endif
1727
1728 spin_lock_irqsave(&priv->lock, flags);
1729
1730 /* Ack/clear/reset pending uCode interrupts.
1731 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1732 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1733 inta = iwl_read32(priv, CSR_INT);
1734 iwl_write32(priv, CSR_INT, inta);
1735
1736 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1737 * Any new interrupts that happen after this, either while we're
1738 * in this tasklet, or later, will show up in next ISR/tasklet. */
1739 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1740 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1741
1742 #ifdef CONFIG_IWLWIFI_DEBUG
1743 if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1744 /* just for debug */
1745 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1746 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1747 inta, inta_mask, inta_fh);
1748 }
1749 #endif
1750
1751 spin_unlock_irqrestore(&priv->lock, flags);
1752
1753 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1754 * atomic, make sure that inta covers all the interrupts that
1755 * we've discovered, even if FH interrupt came in just after
1756 * reading CSR_INT. */
1757 if (inta_fh & CSR39_FH_INT_RX_MASK)
1758 inta |= CSR_INT_BIT_FH_RX;
1759 if (inta_fh & CSR39_FH_INT_TX_MASK)
1760 inta |= CSR_INT_BIT_FH_TX;
1761
1762 /* Now service all interrupt bits discovered above. */
1763 if (inta & CSR_INT_BIT_HW_ERR) {
1764 IWL_ERR(priv, "Hardware error detected. Restarting.\n");
1765
1766 /* Tell the device to stop sending interrupts */
1767 iwl_disable_interrupts(priv);
1768
1769 priv->isr_stats.hw++;
1770 iwl_irq_handle_error(priv);
1771
1772 handled |= CSR_INT_BIT_HW_ERR;
1773
1774 return;
1775 }
1776
1777 #ifdef CONFIG_IWLWIFI_DEBUG
1778 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1779 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1780 if (inta & CSR_INT_BIT_SCD) {
1781 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1782 "the frame/frames.\n");
1783 priv->isr_stats.sch++;
1784 }
1785
1786 /* Alive notification via Rx interrupt will do the real work */
1787 if (inta & CSR_INT_BIT_ALIVE) {
1788 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1789 priv->isr_stats.alive++;
1790 }
1791 }
1792 #endif
1793 /* Safely ignore these bits for debug checks below */
1794 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1795
1796 /* Error detected by uCode */
1797 if (inta & CSR_INT_BIT_SW_ERR) {
1798 IWL_ERR(priv, "Microcode SW error detected. "
1799 "Restarting 0x%X.\n", inta);
1800 priv->isr_stats.sw++;
1801 priv->isr_stats.sw_err = inta;
1802 iwl_irq_handle_error(priv);
1803 handled |= CSR_INT_BIT_SW_ERR;
1804 }
1805
1806 /* uCode wakes up after power-down sleep */
1807 if (inta & CSR_INT_BIT_WAKEUP) {
1808 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1809 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1810 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1811 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1812 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1813 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1814 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1815 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1816
1817 priv->isr_stats.wakeup++;
1818 handled |= CSR_INT_BIT_WAKEUP;
1819 }
1820
1821 /* All uCode command responses, including Tx command responses,
1822 * Rx "responses" (frame-received notification), and other
1823 * notifications from uCode come through here*/
1824 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1825 iwl3945_rx_handle(priv);
1826 priv->isr_stats.rx++;
1827 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1828 }
1829
1830 if (inta & CSR_INT_BIT_FH_TX) {
1831 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1832 priv->isr_stats.tx++;
1833
1834 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1835 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1836 (FH39_SRVC_CHNL), 0x0);
1837 handled |= CSR_INT_BIT_FH_TX;
1838 }
1839
1840 if (inta & ~handled) {
1841 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1842 priv->isr_stats.unhandled++;
1843 }
1844
1845 if (inta & ~priv->inta_mask) {
1846 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1847 inta & ~priv->inta_mask);
1848 IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
1849 }
1850
1851 /* Re-enable all interrupts */
1852 /* only Re-enable if disabled by irq */
1853 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1854 iwl_enable_interrupts(priv);
1855
1856 #ifdef CONFIG_IWLWIFI_DEBUG
1857 if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1858 inta = iwl_read32(priv, CSR_INT);
1859 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1860 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1861 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1862 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1863 }
1864 #endif
1865 }
1866
1867 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1868 enum ieee80211_band band,
1869 u8 is_active, u8 n_probes,
1870 struct iwl3945_scan_channel *scan_ch)
1871 {
1872 struct ieee80211_channel *chan;
1873 const struct ieee80211_supported_band *sband;
1874 const struct iwl_channel_info *ch_info;
1875 u16 passive_dwell = 0;
1876 u16 active_dwell = 0;
1877 int added, i;
1878
1879 sband = iwl_get_hw_mode(priv, band);
1880 if (!sband)
1881 return 0;
1882
1883 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1884 passive_dwell = iwl_get_passive_dwell_time(priv, band);
1885
1886 if (passive_dwell <= active_dwell)
1887 passive_dwell = active_dwell + 1;
1888
1889 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1890 chan = priv->scan_request->channels[i];
1891
1892 if (chan->band != band)
1893 continue;
1894
1895 scan_ch->channel = chan->hw_value;
1896
1897 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1898 if (!is_channel_valid(ch_info)) {
1899 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1900 scan_ch->channel);
1901 continue;
1902 }
1903
1904 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1905 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1906 /* If passive , set up for auto-switch
1907 * and use long active_dwell time.
1908 */
1909 if (!is_active || is_channel_passive(ch_info) ||
1910 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1911 scan_ch->type = 0; /* passive */
1912 if (IWL_UCODE_API(priv->ucode_ver) == 1)
1913 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1914 } else {
1915 scan_ch->type = 1; /* active */
1916 }
1917
1918 /* Set direct probe bits. These may be used both for active
1919 * scan channels (probes gets sent right away),
1920 * or for passive channels (probes get se sent only after
1921 * hearing clear Rx packet).*/
1922 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1923 if (n_probes)
1924 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1925 } else {
1926 /* uCode v1 does not allow setting direct probe bits on
1927 * passive channel. */
1928 if ((scan_ch->type & 1) && n_probes)
1929 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1930 }
1931
1932 /* Set txpower levels to defaults */
1933 scan_ch->tpc.dsp_atten = 110;
1934 /* scan_pwr_info->tpc.dsp_atten; */
1935
1936 /*scan_pwr_info->tpc.tx_gain; */
1937 if (band == IEEE80211_BAND_5GHZ)
1938 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1939 else {
1940 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1941 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1942 * power level:
1943 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1944 */
1945 }
1946
1947 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1948 scan_ch->channel,
1949 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1950 (scan_ch->type & 1) ?
1951 active_dwell : passive_dwell);
1952
1953 scan_ch++;
1954 added++;
1955 }
1956
1957 IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1958 return added;
1959 }
1960
1961 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1962 struct ieee80211_rate *rates)
1963 {
1964 int i;
1965
1966 for (i = 0; i < IWL_RATE_COUNT; i++) {
1967 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1968 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1969 rates[i].hw_value_short = i;
1970 rates[i].flags = 0;
1971 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1972 /*
1973 * If CCK != 1M then set short preamble rate flag.
1974 */
1975 rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1976 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1977 }
1978 }
1979 }
1980
1981 /******************************************************************************
1982 *
1983 * uCode download functions
1984 *
1985 ******************************************************************************/
1986
1987 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1988 {
1989 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1990 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1991 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1992 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1993 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1994 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1995 }
1996
1997 /**
1998 * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1999 * looking at all data.
2000 */
2001 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2002 {
2003 u32 val;
2004 u32 save_len = len;
2005 int rc = 0;
2006 u32 errcnt;
2007
2008 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2009
2010 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2011 IWL39_RTC_INST_LOWER_BOUND);
2012
2013 errcnt = 0;
2014 for (; len > 0; len -= sizeof(u32), image++) {
2015 /* read data comes through single port, auto-incr addr */
2016 /* NOTE: Use the debugless read so we don't flood kernel log
2017 * if IWL_DL_IO is set */
2018 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2019 if (val != le32_to_cpu(*image)) {
2020 IWL_ERR(priv, "uCode INST section is invalid at "
2021 "offset 0x%x, is 0x%x, s/b 0x%x\n",
2022 save_len - len, val, le32_to_cpu(*image));
2023 rc = -EIO;
2024 errcnt++;
2025 if (errcnt >= 20)
2026 break;
2027 }
2028 }
2029
2030
2031 if (!errcnt)
2032 IWL_DEBUG_INFO(priv,
2033 "ucode image in INSTRUCTION memory is good\n");
2034
2035 return rc;
2036 }
2037
2038
2039 /**
2040 * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2041 * using sample data 100 bytes apart. If these sample points are good,
2042 * it's a pretty good bet that everything between them is good, too.
2043 */
2044 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2045 {
2046 u32 val;
2047 int rc = 0;
2048 u32 errcnt = 0;
2049 u32 i;
2050
2051 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2052
2053 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2054 /* read data comes through single port, auto-incr addr */
2055 /* NOTE: Use the debugless read so we don't flood kernel log
2056 * if IWL_DL_IO is set */
2057 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2058 i + IWL39_RTC_INST_LOWER_BOUND);
2059 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2060 if (val != le32_to_cpu(*image)) {
2061 #if 0 /* Enable this if you want to see details */
2062 IWL_ERR(priv, "uCode INST section is invalid at "
2063 "offset 0x%x, is 0x%x, s/b 0x%x\n",
2064 i, val, *image);
2065 #endif
2066 rc = -EIO;
2067 errcnt++;
2068 if (errcnt >= 3)
2069 break;
2070 }
2071 }
2072
2073 return rc;
2074 }
2075
2076
2077 /**
2078 * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2079 * and verify its contents
2080 */
2081 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2082 {
2083 __le32 *image;
2084 u32 len;
2085 int rc = 0;
2086
2087 /* Try bootstrap */
2088 image = (__le32 *)priv->ucode_boot.v_addr;
2089 len = priv->ucode_boot.len;
2090 rc = iwl3945_verify_inst_sparse(priv, image, len);
2091 if (rc == 0) {
2092 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2093 return 0;
2094 }
2095
2096 /* Try initialize */
2097 image = (__le32 *)priv->ucode_init.v_addr;
2098 len = priv->ucode_init.len;
2099 rc = iwl3945_verify_inst_sparse(priv, image, len);
2100 if (rc == 0) {
2101 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2102 return 0;
2103 }
2104
2105 /* Try runtime/protocol */
2106 image = (__le32 *)priv->ucode_code.v_addr;
2107 len = priv->ucode_code.len;
2108 rc = iwl3945_verify_inst_sparse(priv, image, len);
2109 if (rc == 0) {
2110 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2111 return 0;
2112 }
2113
2114 IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2115
2116 /* Since nothing seems to match, show first several data entries in
2117 * instruction SRAM, so maybe visual inspection will give a clue.
2118 * Selection of bootstrap image (vs. other images) is arbitrary. */
2119 image = (__le32 *)priv->ucode_boot.v_addr;
2120 len = priv->ucode_boot.len;
2121 rc = iwl3945_verify_inst_full(priv, image, len);
2122
2123 return rc;
2124 }
2125
2126 static void iwl3945_nic_start(struct iwl_priv *priv)
2127 {
2128 /* Remove all resets to allow NIC to operate */
2129 iwl_write32(priv, CSR_RESET, 0);
2130 }
2131
2132 /**
2133 * iwl3945_read_ucode - Read uCode images from disk file.
2134 *
2135 * Copy into buffers for card to fetch via bus-mastering
2136 */
2137 static int iwl3945_read_ucode(struct iwl_priv *priv)
2138 {
2139 const struct iwl_ucode_header *ucode;
2140 int ret = -EINVAL, index;
2141 const struct firmware *ucode_raw;
2142 /* firmware file name contains uCode/driver compatibility version */
2143 const char *name_pre = priv->cfg->fw_name_pre;
2144 const unsigned int api_max = priv->cfg->ucode_api_max;
2145 const unsigned int api_min = priv->cfg->ucode_api_min;
2146 char buf[25];
2147 u8 *src;
2148 size_t len;
2149 u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2150
2151 /* Ask kernel firmware_class module to get the boot firmware off disk.
2152 * request_firmware() is synchronous, file is in memory on return. */
2153 for (index = api_max; index >= api_min; index--) {
2154 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2155 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2156 if (ret < 0) {
2157 IWL_ERR(priv, "%s firmware file req failed: %d\n",
2158 buf, ret);
2159 if (ret == -ENOENT)
2160 continue;
2161 else
2162 goto error;
2163 } else {
2164 if (index < api_max)
2165 IWL_ERR(priv, "Loaded firmware %s, "
2166 "which is deprecated. "
2167 " Please use API v%u instead.\n",
2168 buf, api_max);
2169 IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2170 "(%zd bytes) from disk\n",
2171 buf, ucode_raw->size);
2172 break;
2173 }
2174 }
2175
2176 if (ret < 0)
2177 goto error;
2178
2179 /* Make sure that we got at least our header! */
2180 if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
2181 IWL_ERR(priv, "File size way too small!\n");
2182 ret = -EINVAL;
2183 goto err_release;
2184 }
2185
2186 /* Data from ucode file: header followed by uCode images */
2187 ucode = (struct iwl_ucode_header *)ucode_raw->data;
2188
2189 priv->ucode_ver = le32_to_cpu(ucode->ver);
2190 api_ver = IWL_UCODE_API(priv->ucode_ver);
2191 inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2192 data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2193 init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2194 init_data_size =
2195 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2196 boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2197 src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2198
2199 /* api_ver should match the api version forming part of the
2200 * firmware filename ... but we don't check for that and only rely
2201 * on the API version read from firmware header from here on forward */
2202
2203 if (api_ver < api_min || api_ver > api_max) {
2204 IWL_ERR(priv, "Driver unable to support your firmware API. "
2205 "Driver supports v%u, firmware is v%u.\n",
2206 api_max, api_ver);
2207 priv->ucode_ver = 0;
2208 ret = -EINVAL;
2209 goto err_release;
2210 }
2211 if (api_ver != api_max)
2212 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2213 "got %u. New firmware can be obtained "
2214 "from http://www.intellinuxwireless.org.\n",
2215 api_max, api_ver);
2216
2217 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2218 IWL_UCODE_MAJOR(priv->ucode_ver),
2219 IWL_UCODE_MINOR(priv->ucode_ver),
2220 IWL_UCODE_API(priv->ucode_ver),
2221 IWL_UCODE_SERIAL(priv->ucode_ver));
2222
2223 snprintf(priv->hw->wiphy->fw_version,
2224 sizeof(priv->hw->wiphy->fw_version),
2225 "%u.%u.%u.%u",
2226 IWL_UCODE_MAJOR(priv->ucode_ver),
2227 IWL_UCODE_MINOR(priv->ucode_ver),
2228 IWL_UCODE_API(priv->ucode_ver),
2229 IWL_UCODE_SERIAL(priv->ucode_ver));
2230
2231 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2232 priv->ucode_ver);
2233 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2234 inst_size);
2235 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2236 data_size);
2237 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2238 init_size);
2239 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2240 init_data_size);
2241 IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2242 boot_size);
2243
2244
2245 /* Verify size of file vs. image size info in file's header */
2246 if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2247 inst_size + data_size + init_size +
2248 init_data_size + boot_size) {
2249
2250 IWL_DEBUG_INFO(priv,
2251 "uCode file size %zd does not match expected size\n",
2252 ucode_raw->size);
2253 ret = -EINVAL;
2254 goto err_release;
2255 }
2256
2257 /* Verify that uCode images will fit in card's SRAM */
2258 if (inst_size > IWL39_MAX_INST_SIZE) {
2259 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2260 inst_size);
2261 ret = -EINVAL;
2262 goto err_release;
2263 }
2264
2265 if (data_size > IWL39_MAX_DATA_SIZE) {
2266 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2267 data_size);
2268 ret = -EINVAL;
2269 goto err_release;
2270 }
2271 if (init_size > IWL39_MAX_INST_SIZE) {
2272 IWL_DEBUG_INFO(priv,
2273 "uCode init instr len %d too large to fit in\n",
2274 init_size);
2275 ret = -EINVAL;
2276 goto err_release;
2277 }
2278 if (init_data_size > IWL39_MAX_DATA_SIZE) {
2279 IWL_DEBUG_INFO(priv,
2280 "uCode init data len %d too large to fit in\n",
2281 init_data_size);
2282 ret = -EINVAL;
2283 goto err_release;
2284 }
2285 if (boot_size > IWL39_MAX_BSM_SIZE) {
2286 IWL_DEBUG_INFO(priv,
2287 "uCode boot instr len %d too large to fit in\n",
2288 boot_size);
2289 ret = -EINVAL;
2290 goto err_release;
2291 }
2292
2293 /* Allocate ucode buffers for card's bus-master loading ... */
2294
2295 /* Runtime instructions and 2 copies of data:
2296 * 1) unmodified from disk
2297 * 2) backup cache for save/restore during power-downs */
2298 priv->ucode_code.len = inst_size;
2299 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2300
2301 priv->ucode_data.len = data_size;
2302 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2303
2304 priv->ucode_data_backup.len = data_size;
2305 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2306
2307 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2308 !priv->ucode_data_backup.v_addr)
2309 goto err_pci_alloc;
2310
2311 /* Initialization instructions and data */
2312 if (init_size && init_data_size) {
2313 priv->ucode_init.len = init_size;
2314 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2315
2316 priv->ucode_init_data.len = init_data_size;
2317 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2318
2319 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2320 goto err_pci_alloc;
2321 }
2322
2323 /* Bootstrap (instructions only, no data) */
2324 if (boot_size) {
2325 priv->ucode_boot.len = boot_size;
2326 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2327
2328 if (!priv->ucode_boot.v_addr)
2329 goto err_pci_alloc;
2330 }
2331
2332 /* Copy images into buffers for card's bus-master reads ... */
2333
2334 /* Runtime instructions (first block of data in file) */
2335 len = inst_size;
2336 IWL_DEBUG_INFO(priv,
2337 "Copying (but not loading) uCode instr len %zd\n", len);
2338 memcpy(priv->ucode_code.v_addr, src, len);
2339 src += len;
2340
2341 IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2342 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2343
2344 /* Runtime data (2nd block)
2345 * NOTE: Copy into backup buffer will be done in iwl3945_up() */
2346 len = data_size;
2347 IWL_DEBUG_INFO(priv,
2348 "Copying (but not loading) uCode data len %zd\n", len);
2349 memcpy(priv->ucode_data.v_addr, src, len);
2350 memcpy(priv->ucode_data_backup.v_addr, src, len);
2351 src += len;
2352
2353 /* Initialization instructions (3rd block) */
2354 if (init_size) {
2355 len = init_size;
2356 IWL_DEBUG_INFO(priv,
2357 "Copying (but not loading) init instr len %zd\n", len);
2358 memcpy(priv->ucode_init.v_addr, src, len);
2359 src += len;
2360 }
2361
2362 /* Initialization data (4th block) */
2363 if (init_data_size) {
2364 len = init_data_size;
2365 IWL_DEBUG_INFO(priv,
2366 "Copying (but not loading) init data len %zd\n", len);
2367 memcpy(priv->ucode_init_data.v_addr, src, len);
2368 src += len;
2369 }
2370
2371 /* Bootstrap instructions (5th block) */
2372 len = boot_size;
2373 IWL_DEBUG_INFO(priv,
2374 "Copying (but not loading) boot instr len %zd\n", len);
2375 memcpy(priv->ucode_boot.v_addr, src, len);
2376
2377 /* We have our copies now, allow OS release its copies */
2378 release_firmware(ucode_raw);
2379 return 0;
2380
2381 err_pci_alloc:
2382 IWL_ERR(priv, "failed to allocate pci memory\n");
2383 ret = -ENOMEM;
2384 iwl3945_dealloc_ucode_pci(priv);
2385
2386 err_release:
2387 release_firmware(ucode_raw);
2388
2389 error:
2390 return ret;
2391 }
2392
2393
2394 /**
2395 * iwl3945_set_ucode_ptrs - Set uCode address location
2396 *
2397 * Tell initialization uCode where to find runtime uCode.
2398 *
2399 * BSM registers initially contain pointers to initialization uCode.
2400 * We need to replace them to load runtime uCode inst and data,
2401 * and to save runtime data when powering down.
2402 */
2403 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2404 {
2405 dma_addr_t pinst;
2406 dma_addr_t pdata;
2407
2408 /* bits 31:0 for 3945 */
2409 pinst = priv->ucode_code.p_addr;
2410 pdata = priv->ucode_data_backup.p_addr;
2411
2412 /* Tell bootstrap uCode where to find image to load */
2413 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2414 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2415 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2416 priv->ucode_data.len);
2417
2418 /* Inst byte count must be last to set up, bit 31 signals uCode
2419 * that all new ptr/size info is in place */
2420 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2421 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2422
2423 IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2424
2425 return 0;
2426 }
2427
2428 /**
2429 * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2430 *
2431 * Called after REPLY_ALIVE notification received from "initialize" uCode.
2432 *
2433 * Tell "initialize" uCode to go ahead and load the runtime uCode.
2434 */
2435 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2436 {
2437 /* Check alive response for "valid" sign from uCode */
2438 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2439 /* We had an error bringing up the hardware, so take it
2440 * all the way back down so we can try again */
2441 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2442 goto restart;
2443 }
2444
2445 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2446 * This is a paranoid check, because we would not have gotten the
2447 * "initialize" alive if code weren't properly loaded. */
2448 if (iwl3945_verify_ucode(priv)) {
2449 /* Runtime instruction load was bad;
2450 * take it all the way back down so we can try again */
2451 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2452 goto restart;
2453 }
2454
2455 /* Send pointers to protocol/runtime uCode image ... init code will
2456 * load and launch runtime uCode, which will send us another "Alive"
2457 * notification. */
2458 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2459 if (iwl3945_set_ucode_ptrs(priv)) {
2460 /* Runtime instruction load won't happen;
2461 * take it all the way back down so we can try again */
2462 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2463 goto restart;
2464 }
2465 return;
2466
2467 restart:
2468 queue_work(priv->workqueue, &priv->restart);
2469 }
2470
2471 /**
2472 * iwl3945_alive_start - called after REPLY_ALIVE notification received
2473 * from protocol/runtime uCode (initialization uCode's
2474 * Alive gets handled by iwl3945_init_alive_start()).
2475 */
2476 static void iwl3945_alive_start(struct iwl_priv *priv)
2477 {
2478 int thermal_spin = 0;
2479 u32 rfkill;
2480
2481 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2482
2483 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2484 /* We had an error bringing up the hardware, so take it
2485 * all the way back down so we can try again */
2486 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2487 goto restart;
2488 }
2489
2490 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2491 * This is a paranoid check, because we would not have gotten the
2492 * "runtime" alive if code weren't properly loaded. */
2493 if (iwl3945_verify_ucode(priv)) {
2494 /* Runtime instruction load was bad;
2495 * take it all the way back down so we can try again */
2496 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2497 goto restart;
2498 }
2499
2500 iwl_clear_stations_table(priv);
2501
2502 rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2503 IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2504
2505 if (rfkill & 0x1) {
2506 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2507 /* if RFKILL is not on, then wait for thermal
2508 * sensor in adapter to kick in */
2509 while (iwl3945_hw_get_temperature(priv) == 0) {
2510 thermal_spin++;
2511 udelay(10);
2512 }
2513
2514 if (thermal_spin)
2515 IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2516 thermal_spin * 10);
2517 } else
2518 set_bit(STATUS_RF_KILL_HW, &priv->status);
2519
2520 /* After the ALIVE response, we can send commands to 3945 uCode */
2521 set_bit(STATUS_ALIVE, &priv->status);
2522
2523 if (iwl_is_rfkill(priv))
2524 return;
2525
2526 ieee80211_wake_queues(priv->hw);
2527
2528 priv->active_rate = priv->rates_mask;
2529 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2530
2531 iwl_power_update_mode(priv, true);
2532
2533 if (iwl_is_associated(priv)) {
2534 struct iwl3945_rxon_cmd *active_rxon =
2535 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2536
2537 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2538 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2539 } else {
2540 /* Initialize our rx_config data */
2541 iwl_connection_init_rx_config(priv, priv->iw_mode);
2542 }
2543
2544 /* Configure Bluetooth device coexistence support */
2545 iwl_send_bt_config(priv);
2546
2547 /* Configure the adapter for unassociated operation */
2548 iwlcore_commit_rxon(priv);
2549
2550 iwl3945_reg_txpower_periodic(priv);
2551
2552 iwl_leds_init(priv);
2553
2554 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2555 set_bit(STATUS_READY, &priv->status);
2556 wake_up_interruptible(&priv->wait_command_queue);
2557
2558 /* reassociate for ADHOC mode */
2559 if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2560 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2561 priv->vif);
2562 if (beacon)
2563 iwl_mac_beacon_update(priv->hw, beacon);
2564 }
2565
2566 if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2567 iwl_set_mode(priv, priv->iw_mode);
2568
2569 return;
2570
2571 restart:
2572 queue_work(priv->workqueue, &priv->restart);
2573 }
2574
2575 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2576
2577 static void __iwl3945_down(struct iwl_priv *priv)
2578 {
2579 unsigned long flags;
2580 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2581 struct ieee80211_conf *conf = NULL;
2582
2583 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2584
2585 conf = ieee80211_get_hw_conf(priv->hw);
2586
2587 if (!exit_pending)
2588 set_bit(STATUS_EXIT_PENDING, &priv->status);
2589
2590 iwl_clear_stations_table(priv);
2591
2592 /* Unblock any waiting calls */
2593 wake_up_interruptible_all(&priv->wait_command_queue);
2594
2595 /* Wipe out the EXIT_PENDING status bit if we are not actually
2596 * exiting the module */
2597 if (!exit_pending)
2598 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2599
2600 /* stop and reset the on-board processor */
2601 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2602
2603 /* tell the device to stop sending interrupts */
2604 spin_lock_irqsave(&priv->lock, flags);
2605 iwl_disable_interrupts(priv);
2606 spin_unlock_irqrestore(&priv->lock, flags);
2607 iwl_synchronize_irq(priv);
2608
2609 if (priv->mac80211_registered)
2610 ieee80211_stop_queues(priv->hw);
2611
2612 /* If we have not previously called iwl3945_init() then
2613 * clear all bits but the RF Kill bits and return */
2614 if (!iwl_is_init(priv)) {
2615 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2616 STATUS_RF_KILL_HW |
2617 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2618 STATUS_GEO_CONFIGURED |
2619 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2620 STATUS_EXIT_PENDING;
2621 goto exit;
2622 }
2623
2624 /* ...otherwise clear out all the status bits but the RF Kill
2625 * bit and continue taking the NIC down. */
2626 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2627 STATUS_RF_KILL_HW |
2628 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2629 STATUS_GEO_CONFIGURED |
2630 test_bit(STATUS_FW_ERROR, &priv->status) <<
2631 STATUS_FW_ERROR |
2632 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2633 STATUS_EXIT_PENDING;
2634
2635 iwl3945_hw_txq_ctx_stop(priv);
2636 iwl3945_hw_rxq_stop(priv);
2637
2638 /* Power-down device's busmaster DMA clocks */
2639 iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2640 udelay(5);
2641
2642 /* Stop the device, and put it in low power state */
2643 priv->cfg->ops->lib->apm_ops.stop(priv);
2644
2645 exit:
2646 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2647
2648 if (priv->ibss_beacon)
2649 dev_kfree_skb(priv->ibss_beacon);
2650 priv->ibss_beacon = NULL;
2651
2652 /* clear out any free frames */
2653 iwl3945_clear_free_frames(priv);
2654 }
2655
2656 static void iwl3945_down(struct iwl_priv *priv)
2657 {
2658 mutex_lock(&priv->mutex);
2659 __iwl3945_down(priv);
2660 mutex_unlock(&priv->mutex);
2661
2662 iwl3945_cancel_deferred_work(priv);
2663 }
2664
2665 #define MAX_HW_RESTARTS 5
2666
2667 static int __iwl3945_up(struct iwl_priv *priv)
2668 {
2669 int rc, i;
2670
2671 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2672 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2673 return -EIO;
2674 }
2675
2676 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2677 IWL_ERR(priv, "ucode not available for device bring up\n");
2678 return -EIO;
2679 }
2680
2681 /* If platform's RF_KILL switch is NOT set to KILL */
2682 if (iwl_read32(priv, CSR_GP_CNTRL) &
2683 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2684 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2685 else {
2686 set_bit(STATUS_RF_KILL_HW, &priv->status);
2687 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2688 return -ENODEV;
2689 }
2690
2691 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2692
2693 rc = iwl3945_hw_nic_init(priv);
2694 if (rc) {
2695 IWL_ERR(priv, "Unable to int nic\n");
2696 return rc;
2697 }
2698
2699 /* make sure rfkill handshake bits are cleared */
2700 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2701 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2702 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2703
2704 /* clear (again), then enable host interrupts */
2705 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2706 iwl_enable_interrupts(priv);
2707
2708 /* really make sure rfkill handshake bits are cleared */
2709 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2710 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2711
2712 /* Copy original ucode data image from disk into backup cache.
2713 * This will be used to initialize the on-board processor's
2714 * data SRAM for a clean start when the runtime program first loads. */
2715 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2716 priv->ucode_data.len);
2717
2718 /* We return success when we resume from suspend and rf_kill is on. */
2719 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2720 return 0;
2721
2722 for (i = 0; i < MAX_HW_RESTARTS; i++) {
2723
2724 iwl_clear_stations_table(priv);
2725
2726 /* load bootstrap state machine,
2727 * load bootstrap program into processor's memory,
2728 * prepare to load the "initialize" uCode */
2729 priv->cfg->ops->lib->load_ucode(priv);
2730
2731 if (rc) {
2732 IWL_ERR(priv,
2733 "Unable to set up bootstrap uCode: %d\n", rc);
2734 continue;
2735 }
2736
2737 /* start card; "initialize" will load runtime ucode */
2738 iwl3945_nic_start(priv);
2739
2740 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2741
2742 return 0;
2743 }
2744
2745 set_bit(STATUS_EXIT_PENDING, &priv->status);
2746 __iwl3945_down(priv);
2747 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2748
2749 /* tried to restart and config the device for as long as our
2750 * patience could withstand */
2751 IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2752 return -EIO;
2753 }
2754
2755
2756 /*****************************************************************************
2757 *
2758 * Workqueue callbacks
2759 *
2760 *****************************************************************************/
2761
2762 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2763 {
2764 struct iwl_priv *priv =
2765 container_of(data, struct iwl_priv, init_alive_start.work);
2766
2767 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2768 return;
2769
2770 mutex_lock(&priv->mutex);
2771 iwl3945_init_alive_start(priv);
2772 mutex_unlock(&priv->mutex);
2773 }
2774
2775 static void iwl3945_bg_alive_start(struct work_struct *data)
2776 {
2777 struct iwl_priv *priv =
2778 container_of(data, struct iwl_priv, alive_start.work);
2779
2780 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2781 return;
2782
2783 mutex_lock(&priv->mutex);
2784 iwl3945_alive_start(priv);
2785 mutex_unlock(&priv->mutex);
2786 }
2787
2788 /*
2789 * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2790 * driver must poll CSR_GP_CNTRL_REG register for change. This register
2791 * *is* readable even when device has been SW_RESET into low power mode
2792 * (e.g. during RF KILL).
2793 */
2794 static void iwl3945_rfkill_poll(struct work_struct *data)
2795 {
2796 struct iwl_priv *priv =
2797 container_of(data, struct iwl_priv, rfkill_poll.work);
2798 bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2799 bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2800 & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2801
2802 if (new_rfkill != old_rfkill) {
2803 if (new_rfkill)
2804 set_bit(STATUS_RF_KILL_HW, &priv->status);
2805 else
2806 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2807
2808 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2809
2810 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2811 new_rfkill ? "disable radio" : "enable radio");
2812 }
2813
2814 /* Keep this running, even if radio now enabled. This will be
2815 * cancelled in mac_start() if system decides to start again */
2816 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2817 round_jiffies_relative(2 * HZ));
2818
2819 }
2820
2821 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2822 static void iwl3945_bg_request_scan(struct work_struct *data)
2823 {
2824 struct iwl_priv *priv =
2825 container_of(data, struct iwl_priv, request_scan);
2826 struct iwl_host_cmd cmd = {
2827 .id = REPLY_SCAN_CMD,
2828 .len = sizeof(struct iwl3945_scan_cmd),
2829 .flags = CMD_SIZE_HUGE,
2830 };
2831 int rc = 0;
2832 struct iwl3945_scan_cmd *scan;
2833 struct ieee80211_conf *conf = NULL;
2834 u8 n_probes = 0;
2835 enum ieee80211_band band;
2836 bool is_active = false;
2837
2838 conf = ieee80211_get_hw_conf(priv->hw);
2839
2840 mutex_lock(&priv->mutex);
2841
2842 cancel_delayed_work(&priv->scan_check);
2843
2844 if (!iwl_is_ready(priv)) {
2845 IWL_WARN(priv, "request scan called when driver not ready.\n");
2846 goto done;
2847 }
2848
2849 /* Make sure the scan wasn't canceled before this queued work
2850 * was given the chance to run... */
2851 if (!test_bit(STATUS_SCANNING, &priv->status))
2852 goto done;
2853
2854 /* This should never be called or scheduled if there is currently
2855 * a scan active in the hardware. */
2856 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2857 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests "
2858 "Ignoring second request.\n");
2859 rc = -EIO;
2860 goto done;
2861 }
2862
2863 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2864 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2865 goto done;
2866 }
2867
2868 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2869 IWL_DEBUG_HC(priv,
2870 "Scan request while abort pending. Queuing.\n");
2871 goto done;
2872 }
2873
2874 if (iwl_is_rfkill(priv)) {
2875 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2876 goto done;
2877 }
2878
2879 if (!test_bit(STATUS_READY, &priv->status)) {
2880 IWL_DEBUG_HC(priv,
2881 "Scan request while uninitialized. Queuing.\n");
2882 goto done;
2883 }
2884
2885 if (!priv->scan_bands) {
2886 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2887 goto done;
2888 }
2889
2890 if (!priv->scan) {
2891 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2892 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2893 if (!priv->scan) {
2894 rc = -ENOMEM;
2895 goto done;
2896 }
2897 }
2898 scan = priv->scan;
2899 memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2900
2901 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2902 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2903
2904 if (iwl_is_associated(priv)) {
2905 u16 interval = 0;
2906 u32 extra;
2907 u32 suspend_time = 100;
2908 u32 scan_suspend_time = 100;
2909 unsigned long flags;
2910
2911 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2912
2913 spin_lock_irqsave(&priv->lock, flags);
2914 interval = priv->beacon_int;
2915 spin_unlock_irqrestore(&priv->lock, flags);
2916
2917 scan->suspend_time = 0;
2918 scan->max_out_time = cpu_to_le32(200 * 1024);
2919 if (!interval)
2920 interval = suspend_time;
2921 /*
2922 * suspend time format:
2923 * 0-19: beacon interval in usec (time before exec.)
2924 * 20-23: 0
2925 * 24-31: number of beacons (suspend between channels)
2926 */
2927
2928 extra = (suspend_time / interval) << 24;
2929 scan_suspend_time = 0xFF0FFFFF &
2930 (extra | ((suspend_time % interval) * 1024));
2931
2932 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2933 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2934 scan_suspend_time, interval);
2935 }
2936
2937 if (priv->scan_request->n_ssids) {
2938 int i, p = 0;
2939 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2940 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2941 /* always does wildcard anyway */
2942 if (!priv->scan_request->ssids[i].ssid_len)
2943 continue;
2944 scan->direct_scan[p].id = WLAN_EID_SSID;
2945 scan->direct_scan[p].len =
2946 priv->scan_request->ssids[i].ssid_len;
2947 memcpy(scan->direct_scan[p].ssid,
2948 priv->scan_request->ssids[i].ssid,
2949 priv->scan_request->ssids[i].ssid_len);
2950 n_probes++;
2951 p++;
2952 }
2953 is_active = true;
2954 } else
2955 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2956
2957 /* We don't build a direct scan probe request; the uCode will do
2958 * that based on the direct_mask added to each channel entry */
2959 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2960 scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2961 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2962
2963 /* flags + rate selection */
2964
2965 if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2966 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2967 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2968 scan->good_CRC_th = 0;
2969 band = IEEE80211_BAND_2GHZ;
2970 } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2971 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2972 /*
2973 * If active scaning is requested but a certain channel
2974 * is marked passive, we can do active scanning if we
2975 * detect transmissions.
2976 */
2977 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2978 band = IEEE80211_BAND_5GHZ;
2979 } else {
2980 IWL_WARN(priv, "Invalid scan band count\n");
2981 goto done;
2982 }
2983
2984 scan->tx_cmd.len = cpu_to_le16(
2985 iwl_fill_probe_req(priv,
2986 (struct ieee80211_mgmt *)scan->data,
2987 priv->scan_request->ie,
2988 priv->scan_request->ie_len,
2989 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2990
2991 /* select Rx antennas */
2992 scan->flags |= iwl3945_get_antenna_flags(priv);
2993
2994 if (iwl_is_monitor_mode(priv))
2995 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2996
2997 scan->channel_count =
2998 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2999 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3000
3001 if (scan->channel_count == 0) {
3002 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3003 goto done;
3004 }
3005
3006 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3007 scan->channel_count * sizeof(struct iwl3945_scan_channel);
3008 cmd.data = scan;
3009 scan->len = cpu_to_le16(cmd.len);
3010
3011 set_bit(STATUS_SCAN_HW, &priv->status);
3012 rc = iwl_send_cmd_sync(priv, &cmd);
3013 if (rc)
3014 goto done;
3015
3016 queue_delayed_work(priv->workqueue, &priv->scan_check,
3017 IWL_SCAN_CHECK_WATCHDOG);
3018
3019 mutex_unlock(&priv->mutex);
3020 return;
3021
3022 done:
3023 /* can not perform scan make sure we clear scanning
3024 * bits from status so next scan request can be performed.
3025 * if we dont clear scanning status bit here all next scan
3026 * will fail
3027 */
3028 clear_bit(STATUS_SCAN_HW, &priv->status);
3029 clear_bit(STATUS_SCANNING, &priv->status);
3030
3031 /* inform mac80211 scan aborted */
3032 queue_work(priv->workqueue, &priv->scan_completed);
3033 mutex_unlock(&priv->mutex);
3034 }
3035
3036 static void iwl3945_bg_restart(struct work_struct *data)
3037 {
3038 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3039
3040 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3041 return;
3042
3043 if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3044 mutex_lock(&priv->mutex);
3045 priv->vif = NULL;
3046 priv->is_open = 0;
3047 mutex_unlock(&priv->mutex);
3048 iwl3945_down(priv);
3049 ieee80211_restart_hw(priv->hw);
3050 } else {
3051 iwl3945_down(priv);
3052
3053 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3054 return;
3055
3056 mutex_lock(&priv->mutex);
3057 __iwl3945_up(priv);
3058 mutex_unlock(&priv->mutex);
3059 }
3060 }
3061
3062 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3063 {
3064 struct iwl_priv *priv =
3065 container_of(data, struct iwl_priv, rx_replenish);
3066
3067 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3068 return;
3069
3070 mutex_lock(&priv->mutex);
3071 iwl3945_rx_replenish(priv);
3072 mutex_unlock(&priv->mutex);
3073 }
3074
3075 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3076
3077 void iwl3945_post_associate(struct iwl_priv *priv)
3078 {
3079 int rc = 0;
3080 struct ieee80211_conf *conf = NULL;
3081
3082 if (priv->iw_mode == NL80211_IFTYPE_AP) {
3083 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3084 return;
3085 }
3086
3087
3088 IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3089 priv->assoc_id, priv->active_rxon.bssid_addr);
3090
3091 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3092 return;
3093
3094 if (!priv->vif || !priv->is_open)
3095 return;
3096
3097 iwl_scan_cancel_timeout(priv, 200);
3098
3099 conf = ieee80211_get_hw_conf(priv->hw);
3100
3101 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3102 iwlcore_commit_rxon(priv);
3103
3104 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3105 iwl_setup_rxon_timing(priv);
3106 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3107 sizeof(priv->rxon_timing), &priv->rxon_timing);
3108 if (rc)
3109 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3110 "Attempting to continue.\n");
3111
3112 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3113
3114 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3115
3116 IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3117 priv->assoc_id, priv->beacon_int);
3118
3119 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3120 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3121 else
3122 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3123
3124 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3125 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3126 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3127 else
3128 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3129
3130 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3131 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3132
3133 }
3134
3135 iwlcore_commit_rxon(priv);
3136
3137 switch (priv->iw_mode) {
3138 case NL80211_IFTYPE_STATION:
3139 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3140 break;
3141
3142 case NL80211_IFTYPE_ADHOC:
3143
3144 priv->assoc_id = 1;
3145 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3146 iwl3945_sync_sta(priv, IWL_STA_ID,
3147 (priv->band == IEEE80211_BAND_5GHZ) ?
3148 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3149 CMD_ASYNC);
3150 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3151 iwl3945_send_beacon_cmd(priv);
3152
3153 break;
3154
3155 default:
3156 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3157 __func__, priv->iw_mode);
3158 break;
3159 }
3160
3161 iwl_activate_qos(priv, 0);
3162
3163 /* we have just associated, don't start scan too early */
3164 priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3165 }
3166
3167 /*****************************************************************************
3168 *
3169 * mac80211 entry point functions
3170 *
3171 *****************************************************************************/
3172
3173 #define UCODE_READY_TIMEOUT (2 * HZ)
3174
3175 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3176 {
3177 struct iwl_priv *priv = hw->priv;
3178 int ret;
3179
3180 IWL_DEBUG_MAC80211(priv, "enter\n");
3181
3182 /* we should be verifying the device is ready to be opened */
3183 mutex_lock(&priv->mutex);
3184
3185 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3186 * ucode filename and max sizes are card-specific. */
3187
3188 if (!priv->ucode_code.len) {
3189 ret = iwl3945_read_ucode(priv);
3190 if (ret) {
3191 IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3192 mutex_unlock(&priv->mutex);
3193 goto out_release_irq;
3194 }
3195 }
3196
3197 ret = __iwl3945_up(priv);
3198
3199 mutex_unlock(&priv->mutex);
3200
3201 if (ret)
3202 goto out_release_irq;
3203
3204 IWL_DEBUG_INFO(priv, "Start UP work.\n");
3205
3206 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3207 * mac80211 will not be run successfully. */
3208 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3209 test_bit(STATUS_READY, &priv->status),
3210 UCODE_READY_TIMEOUT);
3211 if (!ret) {
3212 if (!test_bit(STATUS_READY, &priv->status)) {
3213 IWL_ERR(priv,
3214 "Wait for START_ALIVE timeout after %dms.\n",
3215 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3216 ret = -ETIMEDOUT;
3217 goto out_release_irq;
3218 }
3219 }
3220
3221 /* ucode is running and will send rfkill notifications,
3222 * no need to poll the killswitch state anymore */
3223 cancel_delayed_work(&priv->rfkill_poll);
3224
3225 iwl_led_start(priv);
3226
3227 priv->is_open = 1;
3228 IWL_DEBUG_MAC80211(priv, "leave\n");
3229 return 0;
3230
3231 out_release_irq:
3232 priv->is_open = 0;
3233 IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3234 return ret;
3235 }
3236
3237 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3238 {
3239 struct iwl_priv *priv = hw->priv;
3240
3241 IWL_DEBUG_MAC80211(priv, "enter\n");
3242
3243 if (!priv->is_open) {
3244 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3245 return;
3246 }
3247
3248 priv->is_open = 0;
3249
3250 if (iwl_is_ready_rf(priv)) {
3251 /* stop mac, cancel any scan request and clear
3252 * RXON_FILTER_ASSOC_MSK BIT
3253 */
3254 mutex_lock(&priv->mutex);
3255 iwl_scan_cancel_timeout(priv, 100);
3256 mutex_unlock(&priv->mutex);
3257 }
3258
3259 iwl3945_down(priv);
3260
3261 flush_workqueue(priv->workqueue);
3262
3263 /* start polling the killswitch state again */
3264 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3265 round_jiffies_relative(2 * HZ));
3266
3267 IWL_DEBUG_MAC80211(priv, "leave\n");
3268 }
3269
3270 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3271 {
3272 struct iwl_priv *priv = hw->priv;
3273
3274 IWL_DEBUG_MAC80211(priv, "enter\n");
3275
3276 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3277 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3278
3279 if (iwl3945_tx_skb(priv, skb))
3280 dev_kfree_skb_any(skb);
3281
3282 IWL_DEBUG_MAC80211(priv, "leave\n");
3283 return NETDEV_TX_OK;
3284 }
3285
3286 void iwl3945_config_ap(struct iwl_priv *priv)
3287 {
3288 int rc = 0;
3289
3290 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3291 return;
3292
3293 /* The following should be done only at AP bring up */
3294 if (!(iwl_is_associated(priv))) {
3295
3296 /* RXON - unassoc (to set timing command) */
3297 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3298 iwlcore_commit_rxon(priv);
3299
3300 /* RXON Timing */
3301 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3302 iwl_setup_rxon_timing(priv);
3303 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3304 sizeof(priv->rxon_timing),
3305 &priv->rxon_timing);
3306 if (rc)
3307 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3308 "Attempting to continue.\n");
3309
3310 /* FIXME: what should be the assoc_id for AP? */
3311 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3312 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3313 priv->staging_rxon.flags |=
3314 RXON_FLG_SHORT_PREAMBLE_MSK;
3315 else
3316 priv->staging_rxon.flags &=
3317 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3318
3319 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3320 if (priv->assoc_capability &
3321 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3322 priv->staging_rxon.flags |=
3323 RXON_FLG_SHORT_SLOT_MSK;
3324 else
3325 priv->staging_rxon.flags &=
3326 ~RXON_FLG_SHORT_SLOT_MSK;
3327
3328 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3329 priv->staging_rxon.flags &=
3330 ~RXON_FLG_SHORT_SLOT_MSK;
3331 }
3332 /* restore RXON assoc */
3333 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3334 iwlcore_commit_rxon(priv);
3335 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3336 }
3337 iwl3945_send_beacon_cmd(priv);
3338
3339 /* FIXME - we need to add code here to detect a totally new
3340 * configuration, reset the AP, unassoc, rxon timing, assoc,
3341 * clear sta table, add BCAST sta... */
3342 }
3343
3344 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3345 struct ieee80211_vif *vif,
3346 struct ieee80211_sta *sta,
3347 struct ieee80211_key_conf *key)
3348 {
3349 struct iwl_priv *priv = hw->priv;
3350 const u8 *addr;
3351 int ret = 0;
3352 u8 sta_id = IWL_INVALID_STATION;
3353 u8 static_key;
3354
3355 IWL_DEBUG_MAC80211(priv, "enter\n");
3356
3357 if (iwl3945_mod_params.sw_crypto) {
3358 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3359 return -EOPNOTSUPP;
3360 }
3361
3362 addr = sta ? sta->addr : iwl_bcast_addr;
3363 static_key = !iwl_is_associated(priv);
3364
3365 if (!static_key) {
3366 sta_id = iwl_find_station(priv, addr);
3367 if (sta_id == IWL_INVALID_STATION) {
3368 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3369 addr);
3370 return -EINVAL;
3371 }
3372 }
3373
3374 mutex_lock(&priv->mutex);
3375 iwl_scan_cancel_timeout(priv, 100);
3376 mutex_unlock(&priv->mutex);
3377
3378 switch (cmd) {
3379 case SET_KEY:
3380 if (static_key)
3381 ret = iwl3945_set_static_key(priv, key);
3382 else
3383 ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3384 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3385 break;
3386 case DISABLE_KEY:
3387 if (static_key)
3388 ret = iwl3945_remove_static_key(priv);
3389 else
3390 ret = iwl3945_clear_sta_key_info(priv, sta_id);
3391 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3392 break;
3393 default:
3394 ret = -EINVAL;
3395 }
3396
3397 IWL_DEBUG_MAC80211(priv, "leave\n");
3398
3399 return ret;
3400 }
3401
3402 /*****************************************************************************
3403 *
3404 * sysfs attributes
3405 *
3406 *****************************************************************************/
3407
3408 #ifdef CONFIG_IWLWIFI_DEBUG
3409
3410 /*
3411 * The following adds a new attribute to the sysfs representation
3412 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3413 * used for controlling the debug level.
3414 *
3415 * See the level definitions in iwl for details.
3416 *
3417 * The debug_level being managed using sysfs below is a per device debug
3418 * level that is used instead of the global debug level if it (the per
3419 * device debug level) is set.
3420 */
3421 static ssize_t show_debug_level(struct device *d,
3422 struct device_attribute *attr, char *buf)
3423 {
3424 struct iwl_priv *priv = dev_get_drvdata(d);
3425 return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3426 }
3427 static ssize_t store_debug_level(struct device *d,
3428 struct device_attribute *attr,
3429 const char *buf, size_t count)
3430 {
3431 struct iwl_priv *priv = dev_get_drvdata(d);
3432 unsigned long val;
3433 int ret;
3434
3435 ret = strict_strtoul(buf, 0, &val);
3436 if (ret)
3437 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3438 else {
3439 priv->debug_level = val;
3440 if (iwl_alloc_traffic_mem(priv))
3441 IWL_ERR(priv,
3442 "Not enough memory to generate traffic log\n");
3443 }
3444 return strnlen(buf, count);
3445 }
3446
3447 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3448 show_debug_level, store_debug_level);
3449
3450 #endif /* CONFIG_IWLWIFI_DEBUG */
3451
3452 static ssize_t show_temperature(struct device *d,
3453 struct device_attribute *attr, char *buf)
3454 {
3455 struct iwl_priv *priv = dev_get_drvdata(d);
3456
3457 if (!iwl_is_alive(priv))
3458 return -EAGAIN;
3459
3460 return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3461 }
3462
3463 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3464
3465 static ssize_t show_tx_power(struct device *d,
3466 struct device_attribute *attr, char *buf)
3467 {
3468 struct iwl_priv *priv = dev_get_drvdata(d);
3469 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3470 }
3471
3472 static ssize_t store_tx_power(struct device *d,
3473 struct device_attribute *attr,
3474 const char *buf, size_t count)
3475 {
3476 struct iwl_priv *priv = dev_get_drvdata(d);
3477 char *p = (char *)buf;
3478 u32 val;
3479
3480 val = simple_strtoul(p, &p, 10);
3481 if (p == buf)
3482 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3483 else
3484 iwl3945_hw_reg_set_txpower(priv, val);
3485
3486 return count;
3487 }
3488
3489 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3490
3491 static ssize_t show_flags(struct device *d,
3492 struct device_attribute *attr, char *buf)
3493 {
3494 struct iwl_priv *priv = dev_get_drvdata(d);
3495
3496 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3497 }
3498
3499 static ssize_t store_flags(struct device *d,
3500 struct device_attribute *attr,
3501 const char *buf, size_t count)
3502 {
3503 struct iwl_priv *priv = dev_get_drvdata(d);
3504 u32 flags = simple_strtoul(buf, NULL, 0);
3505
3506 mutex_lock(&priv->mutex);
3507 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3508 /* Cancel any currently running scans... */
3509 if (iwl_scan_cancel_timeout(priv, 100))
3510 IWL_WARN(priv, "Could not cancel scan.\n");
3511 else {
3512 IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3513 flags);
3514 priv->staging_rxon.flags = cpu_to_le32(flags);
3515 iwlcore_commit_rxon(priv);
3516 }
3517 }
3518 mutex_unlock(&priv->mutex);
3519
3520 return count;
3521 }
3522
3523 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3524
3525 static ssize_t show_filter_flags(struct device *d,
3526 struct device_attribute *attr, char *buf)
3527 {
3528 struct iwl_priv *priv = dev_get_drvdata(d);
3529
3530 return sprintf(buf, "0x%04X\n",
3531 le32_to_cpu(priv->active_rxon.filter_flags));
3532 }
3533
3534 static ssize_t store_filter_flags(struct device *d,
3535 struct device_attribute *attr,
3536 const char *buf, size_t count)
3537 {
3538 struct iwl_priv *priv = dev_get_drvdata(d);
3539 u32 filter_flags = simple_strtoul(buf, NULL, 0);
3540
3541 mutex_lock(&priv->mutex);
3542 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3543 /* Cancel any currently running scans... */
3544 if (iwl_scan_cancel_timeout(priv, 100))
3545 IWL_WARN(priv, "Could not cancel scan.\n");
3546 else {
3547 IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3548 "0x%04X\n", filter_flags);
3549 priv->staging_rxon.filter_flags =
3550 cpu_to_le32(filter_flags);
3551 iwlcore_commit_rxon(priv);
3552 }
3553 }
3554 mutex_unlock(&priv->mutex);
3555
3556 return count;
3557 }
3558
3559 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3560 store_filter_flags);
3561
3562 static ssize_t show_measurement(struct device *d,
3563 struct device_attribute *attr, char *buf)
3564 {
3565 struct iwl_priv *priv = dev_get_drvdata(d);
3566 struct iwl_spectrum_notification measure_report;
3567 u32 size = sizeof(measure_report), len = 0, ofs = 0;
3568 u8 *data = (u8 *)&measure_report;
3569 unsigned long flags;
3570
3571 spin_lock_irqsave(&priv->lock, flags);
3572 if (!(priv->measurement_status & MEASUREMENT_READY)) {
3573 spin_unlock_irqrestore(&priv->lock, flags);
3574 return 0;
3575 }
3576 memcpy(&measure_report, &priv->measure_report, size);
3577 priv->measurement_status = 0;
3578 spin_unlock_irqrestore(&priv->lock, flags);
3579
3580 while (size && (PAGE_SIZE - len)) {
3581 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3582 PAGE_SIZE - len, 1);
3583 len = strlen(buf);
3584 if (PAGE_SIZE - len)
3585 buf[len++] = '\n';
3586
3587 ofs += 16;
3588 size -= min(size, 16U);
3589 }
3590
3591 return len;
3592 }
3593
3594 static ssize_t store_measurement(struct device *d,
3595 struct device_attribute *attr,
3596 const char *buf, size_t count)
3597 {
3598 struct iwl_priv *priv = dev_get_drvdata(d);
3599 struct ieee80211_measurement_params params = {
3600 .channel = le16_to_cpu(priv->active_rxon.channel),
3601 .start_time = cpu_to_le64(priv->last_tsf),
3602 .duration = cpu_to_le16(1),
3603 };
3604 u8 type = IWL_MEASURE_BASIC;
3605 u8 buffer[32];
3606 u8 channel;
3607
3608 if (count) {
3609 char *p = buffer;
3610 strncpy(buffer, buf, min(sizeof(buffer), count));
3611 channel = simple_strtoul(p, NULL, 0);
3612 if (channel)
3613 params.channel = channel;
3614
3615 p = buffer;
3616 while (*p && *p != ' ')
3617 p++;
3618 if (*p)
3619 type = simple_strtoul(p + 1, NULL, 0);
3620 }
3621
3622 IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3623 "channel %d (for '%s')\n", type, params.channel, buf);
3624 iwl3945_get_measurement(priv, &params, type);
3625
3626 return count;
3627 }
3628
3629 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3630 show_measurement, store_measurement);
3631
3632 static ssize_t store_retry_rate(struct device *d,
3633 struct device_attribute *attr,
3634 const char *buf, size_t count)
3635 {
3636 struct iwl_priv *priv = dev_get_drvdata(d);
3637
3638 priv->retry_rate = simple_strtoul(buf, NULL, 0);
3639 if (priv->retry_rate <= 0)
3640 priv->retry_rate = 1;
3641
3642 return count;
3643 }
3644
3645 static ssize_t show_retry_rate(struct device *d,
3646 struct device_attribute *attr, char *buf)
3647 {
3648 struct iwl_priv *priv = dev_get_drvdata(d);
3649 return sprintf(buf, "%d", priv->retry_rate);
3650 }
3651
3652 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3653 store_retry_rate);
3654
3655
3656 static ssize_t show_channels(struct device *d,
3657 struct device_attribute *attr, char *buf)
3658 {
3659 /* all this shit doesn't belong into sysfs anyway */
3660 return 0;
3661 }
3662
3663 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3664
3665 static ssize_t show_statistics(struct device *d,
3666 struct device_attribute *attr, char *buf)
3667 {
3668 struct iwl_priv *priv = dev_get_drvdata(d);
3669 u32 size = sizeof(struct iwl3945_notif_statistics);
3670 u32 len = 0, ofs = 0;
3671 u8 *data = (u8 *)&priv->statistics_39;
3672 int rc = 0;
3673
3674 if (!iwl_is_alive(priv))
3675 return -EAGAIN;
3676
3677 mutex_lock(&priv->mutex);
3678 rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3679 mutex_unlock(&priv->mutex);
3680
3681 if (rc) {
3682 len = sprintf(buf,
3683 "Error sending statistics request: 0x%08X\n", rc);
3684 return len;
3685 }
3686
3687 while (size && (PAGE_SIZE - len)) {
3688 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3689 PAGE_SIZE - len, 1);
3690 len = strlen(buf);
3691 if (PAGE_SIZE - len)
3692 buf[len++] = '\n';
3693
3694 ofs += 16;
3695 size -= min(size, 16U);
3696 }
3697
3698 return len;
3699 }
3700
3701 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3702
3703 static ssize_t show_antenna(struct device *d,
3704 struct device_attribute *attr, char *buf)
3705 {
3706 struct iwl_priv *priv = dev_get_drvdata(d);
3707
3708 if (!iwl_is_alive(priv))
3709 return -EAGAIN;
3710
3711 return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3712 }
3713
3714 static ssize_t store_antenna(struct device *d,
3715 struct device_attribute *attr,
3716 const char *buf, size_t count)
3717 {
3718 struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3719 int ant;
3720
3721 if (count == 0)
3722 return 0;
3723
3724 if (sscanf(buf, "%1i", &ant) != 1) {
3725 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3726 return count;
3727 }
3728
3729 if ((ant >= 0) && (ant <= 2)) {
3730 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3731 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3732 } else
3733 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3734
3735
3736 return count;
3737 }
3738
3739 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3740
3741 static ssize_t show_status(struct device *d,
3742 struct device_attribute *attr, char *buf)
3743 {
3744 struct iwl_priv *priv = dev_get_drvdata(d);
3745 if (!iwl_is_alive(priv))
3746 return -EAGAIN;
3747 return sprintf(buf, "0x%08x\n", (int)priv->status);
3748 }
3749
3750 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3751
3752 static ssize_t dump_error_log(struct device *d,
3753 struct device_attribute *attr,
3754 const char *buf, size_t count)
3755 {
3756 struct iwl_priv *priv = dev_get_drvdata(d);
3757 char *p = (char *)buf;
3758
3759 if (p[0] == '1')
3760 iwl3945_dump_nic_error_log(priv);
3761
3762 return strnlen(buf, count);
3763 }
3764
3765 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3766
3767 /*****************************************************************************
3768 *
3769 * driver setup and tear down
3770 *
3771 *****************************************************************************/
3772
3773 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3774 {
3775 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3776
3777 init_waitqueue_head(&priv->wait_command_queue);
3778
3779 INIT_WORK(&priv->restart, iwl3945_bg_restart);
3780 INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3781 INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3782 INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3783 INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3784 INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3785 INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3786 INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3787 INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3788 INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3789
3790 iwl3945_hw_setup_deferred_work(priv);
3791
3792 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3793 iwl3945_irq_tasklet, (unsigned long)priv);
3794 }
3795
3796 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3797 {
3798 iwl3945_hw_cancel_deferred_work(priv);
3799
3800 cancel_delayed_work_sync(&priv->init_alive_start);
3801 cancel_delayed_work(&priv->scan_check);
3802 cancel_delayed_work(&priv->alive_start);
3803 cancel_work_sync(&priv->beacon_update);
3804 }
3805
3806 static struct attribute *iwl3945_sysfs_entries[] = {
3807 &dev_attr_antenna.attr,
3808 &dev_attr_channels.attr,
3809 &dev_attr_dump_errors.attr,
3810 &dev_attr_flags.attr,
3811 &dev_attr_filter_flags.attr,
3812 &dev_attr_measurement.attr,
3813 &dev_attr_retry_rate.attr,
3814 &dev_attr_statistics.attr,
3815 &dev_attr_status.attr,
3816 &dev_attr_temperature.attr,
3817 &dev_attr_tx_power.attr,
3818 #ifdef CONFIG_IWLWIFI_DEBUG
3819 &dev_attr_debug_level.attr,
3820 #endif
3821 NULL
3822 };
3823
3824 static struct attribute_group iwl3945_attribute_group = {
3825 .name = NULL, /* put in device directory */
3826 .attrs = iwl3945_sysfs_entries,
3827 };
3828
3829 static struct ieee80211_ops iwl3945_hw_ops = {
3830 .tx = iwl3945_mac_tx,
3831 .start = iwl3945_mac_start,
3832 .stop = iwl3945_mac_stop,
3833 .add_interface = iwl_mac_add_interface,
3834 .remove_interface = iwl_mac_remove_interface,
3835 .config = iwl_mac_config,
3836 .configure_filter = iwl_configure_filter,
3837 .set_key = iwl3945_mac_set_key,
3838 .get_tx_stats = iwl_mac_get_tx_stats,
3839 .conf_tx = iwl_mac_conf_tx,
3840 .reset_tsf = iwl_mac_reset_tsf,
3841 .bss_info_changed = iwl_bss_info_changed,
3842 .hw_scan = iwl_mac_hw_scan
3843 };
3844
3845 static int iwl3945_init_drv(struct iwl_priv *priv)
3846 {
3847 int ret;
3848 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3849
3850 priv->retry_rate = 1;
3851 priv->ibss_beacon = NULL;
3852
3853 spin_lock_init(&priv->sta_lock);
3854 spin_lock_init(&priv->hcmd_lock);
3855
3856 INIT_LIST_HEAD(&priv->free_frames);
3857
3858 mutex_init(&priv->mutex);
3859
3860 /* Clear the driver's (not device's) station table */
3861 iwl_clear_stations_table(priv);
3862
3863 priv->ieee_channels = NULL;
3864 priv->ieee_rates = NULL;
3865 priv->band = IEEE80211_BAND_2GHZ;
3866
3867 priv->iw_mode = NL80211_IFTYPE_STATION;
3868 priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3869
3870 iwl_reset_qos(priv);
3871
3872 priv->qos_data.qos_active = 0;
3873 priv->qos_data.qos_cap.val = 0;
3874
3875 priv->rates_mask = IWL_RATES_MASK;
3876 priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3877
3878 if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3879 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3880 eeprom->version);
3881 ret = -EINVAL;
3882 goto err;
3883 }
3884 ret = iwl_init_channel_map(priv);
3885 if (ret) {
3886 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3887 goto err;
3888 }
3889
3890 /* Set up txpower settings in driver for all channels */
3891 if (iwl3945_txpower_set_from_eeprom(priv)) {
3892 ret = -EIO;
3893 goto err_free_channel_map;
3894 }
3895
3896 ret = iwlcore_init_geos(priv);
3897 if (ret) {
3898 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3899 goto err_free_channel_map;
3900 }
3901 iwl3945_init_hw_rates(priv, priv->ieee_rates);
3902
3903 return 0;
3904
3905 err_free_channel_map:
3906 iwl_free_channel_map(priv);
3907 err:
3908 return ret;
3909 }
3910
3911 static int iwl3945_setup_mac(struct iwl_priv *priv)
3912 {
3913 int ret;
3914 struct ieee80211_hw *hw = priv->hw;
3915
3916 hw->rate_control_algorithm = "iwl-3945-rs";
3917 hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3918
3919 /* Tell mac80211 our characteristics */
3920 hw->flags = IEEE80211_HW_SIGNAL_DBM |
3921 IEEE80211_HW_NOISE_DBM |
3922 IEEE80211_HW_SPECTRUM_MGMT;
3923
3924 if (!priv->cfg->broken_powersave)
3925 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3926 IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3927
3928 hw->wiphy->interface_modes =
3929 BIT(NL80211_IFTYPE_STATION) |
3930 BIT(NL80211_IFTYPE_ADHOC);
3931
3932 hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
3933 WIPHY_FLAG_DISABLE_BEACON_HINTS;
3934
3935 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3936 /* we create the 802.11 header and a zero-length SSID element */
3937 hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3938
3939 /* Default value; 4 EDCA QOS priorities */
3940 hw->queues = 4;
3941
3942 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3943 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3944 &priv->bands[IEEE80211_BAND_2GHZ];
3945
3946 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3947 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3948 &priv->bands[IEEE80211_BAND_5GHZ];
3949
3950 ret = ieee80211_register_hw(priv->hw);
3951 if (ret) {
3952 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3953 return ret;
3954 }
3955 priv->mac80211_registered = 1;
3956
3957 return 0;
3958 }
3959
3960 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3961 {
3962 int err = 0;
3963 struct iwl_priv *priv;
3964 struct ieee80211_hw *hw;
3965 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3966 struct iwl3945_eeprom *eeprom;
3967 unsigned long flags;
3968
3969 /***********************
3970 * 1. Allocating HW data
3971 * ********************/
3972
3973 /* mac80211 allocates memory for this device instance, including
3974 * space for this driver's private structure */
3975 hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3976 if (hw == NULL) {
3977 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3978 err = -ENOMEM;
3979 goto out;
3980 }
3981 priv = hw->priv;
3982 SET_IEEE80211_DEV(hw, &pdev->dev);
3983
3984 /*
3985 * Disabling hardware scan means that mac80211 will perform scans
3986 * "the hard way", rather than using device's scan.
3987 */
3988 if (iwl3945_mod_params.disable_hw_scan) {
3989 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3990 iwl3945_hw_ops.hw_scan = NULL;
3991 }
3992
3993
3994 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3995 priv->cfg = cfg;
3996 priv->pci_dev = pdev;
3997 priv->inta_mask = CSR_INI_SET_MASK;
3998
3999 #ifdef CONFIG_IWLWIFI_DEBUG
4000 atomic_set(&priv->restrict_refcnt, 0);
4001 #endif
4002 if (iwl_alloc_traffic_mem(priv))
4003 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4004
4005 /***************************
4006 * 2. Initializing PCI bus
4007 * *************************/
4008 if (pci_enable_device(pdev)) {
4009 err = -ENODEV;
4010 goto out_ieee80211_free_hw;
4011 }
4012
4013 pci_set_master(pdev);
4014
4015 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4016 if (!err)
4017 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4018 if (err) {
4019 IWL_WARN(priv, "No suitable DMA available.\n");
4020 goto out_pci_disable_device;
4021 }
4022
4023 pci_set_drvdata(pdev, priv);
4024 err = pci_request_regions(pdev, DRV_NAME);
4025 if (err)
4026 goto out_pci_disable_device;
4027
4028 /***********************
4029 * 3. Read REV Register
4030 * ********************/
4031 priv->hw_base = pci_iomap(pdev, 0, 0);
4032 if (!priv->hw_base) {
4033 err = -ENODEV;
4034 goto out_pci_release_regions;
4035 }
4036
4037 IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4038 (unsigned long long) pci_resource_len(pdev, 0));
4039 IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4040
4041 /* We disable the RETRY_TIMEOUT register (0x41) to keep
4042 * PCI Tx retries from interfering with C3 CPU state */
4043 pci_write_config_byte(pdev, 0x41, 0x00);
4044
4045 /* these spin locks will be used in apm_ops.init and EEPROM access
4046 * we should init now
4047 */
4048 spin_lock_init(&priv->reg_lock);
4049 spin_lock_init(&priv->lock);
4050
4051 /***********************
4052 * 4. Read EEPROM
4053 * ********************/
4054
4055 /* Read the EEPROM */
4056 err = iwl_eeprom_init(priv);
4057 if (err) {
4058 IWL_ERR(priv, "Unable to init EEPROM\n");
4059 goto out_iounmap;
4060 }
4061 /* MAC Address location in EEPROM same for 3945/4965 */
4062 eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4063 memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4064 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4065 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4066
4067 /***********************
4068 * 5. Setup HW Constants
4069 * ********************/
4070 /* Device-specific setup */
4071 if (iwl3945_hw_set_hw_params(priv)) {
4072 IWL_ERR(priv, "failed to set hw settings\n");
4073 goto out_eeprom_free;
4074 }
4075
4076 /***********************
4077 * 6. Setup priv
4078 * ********************/
4079
4080 err = iwl3945_init_drv(priv);
4081 if (err) {
4082 IWL_ERR(priv, "initializing driver failed\n");
4083 goto out_unset_hw_params;
4084 }
4085
4086 IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4087 priv->cfg->name);
4088
4089 /***********************
4090 * 7. Setup Services
4091 * ********************/
4092
4093 spin_lock_irqsave(&priv->lock, flags);
4094 iwl_disable_interrupts(priv);
4095 spin_unlock_irqrestore(&priv->lock, flags);
4096
4097 pci_enable_msi(priv->pci_dev);
4098
4099 err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4100 IRQF_SHARED, DRV_NAME, priv);
4101 if (err) {
4102 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4103 goto out_disable_msi;
4104 }
4105
4106 err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4107 if (err) {
4108 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4109 goto out_release_irq;
4110 }
4111
4112 iwl_set_rxon_channel(priv,
4113 &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4114 iwl3945_setup_deferred_work(priv);
4115 iwl3945_setup_rx_handlers(priv);
4116 iwl_power_initialize(priv);
4117
4118 /*********************************
4119 * 8. Setup and Register mac80211
4120 * *******************************/
4121
4122 iwl_enable_interrupts(priv);
4123
4124 err = iwl3945_setup_mac(priv);
4125 if (err)
4126 goto out_remove_sysfs;
4127
4128 err = iwl_dbgfs_register(priv, DRV_NAME);
4129 if (err)
4130 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4131
4132 /* Start monitoring the killswitch */
4133 queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4134 2 * HZ);
4135
4136 return 0;
4137
4138 out_remove_sysfs:
4139 destroy_workqueue(priv->workqueue);
4140 priv->workqueue = NULL;
4141 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4142 out_release_irq:
4143 free_irq(priv->pci_dev->irq, priv);
4144 out_disable_msi:
4145 pci_disable_msi(priv->pci_dev);
4146 iwlcore_free_geos(priv);
4147 iwl_free_channel_map(priv);
4148 out_unset_hw_params:
4149 iwl3945_unset_hw_params(priv);
4150 out_eeprom_free:
4151 iwl_eeprom_free(priv);
4152 out_iounmap:
4153 pci_iounmap(pdev, priv->hw_base);
4154 out_pci_release_regions:
4155 pci_release_regions(pdev);
4156 out_pci_disable_device:
4157 pci_set_drvdata(pdev, NULL);
4158 pci_disable_device(pdev);
4159 out_ieee80211_free_hw:
4160 iwl_free_traffic_mem(priv);
4161 ieee80211_free_hw(priv->hw);
4162 out:
4163 return err;
4164 }
4165
4166 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4167 {
4168 struct iwl_priv *priv = pci_get_drvdata(pdev);
4169 unsigned long flags;
4170
4171 if (!priv)
4172 return;
4173
4174 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4175
4176 iwl_dbgfs_unregister(priv);
4177
4178 set_bit(STATUS_EXIT_PENDING, &priv->status);
4179
4180 if (priv->mac80211_registered) {
4181 ieee80211_unregister_hw(priv->hw);
4182 priv->mac80211_registered = 0;
4183 } else {
4184 iwl3945_down(priv);
4185 }
4186
4187 /*
4188 * Make sure device is reset to low power before unloading driver.
4189 * This may be redundant with iwl_down(), but there are paths to
4190 * run iwl_down() without calling apm_ops.stop(), and there are
4191 * paths to avoid running iwl_down() at all before leaving driver.
4192 * This (inexpensive) call *makes sure* device is reset.
4193 */
4194 priv->cfg->ops->lib->apm_ops.stop(priv);
4195
4196 /* make sure we flush any pending irq or
4197 * tasklet for the driver
4198 */
4199 spin_lock_irqsave(&priv->lock, flags);
4200 iwl_disable_interrupts(priv);
4201 spin_unlock_irqrestore(&priv->lock, flags);
4202
4203 iwl_synchronize_irq(priv);
4204
4205 sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4206
4207 cancel_delayed_work_sync(&priv->rfkill_poll);
4208
4209 iwl3945_dealloc_ucode_pci(priv);
4210
4211 if (priv->rxq.bd)
4212 iwl3945_rx_queue_free(priv, &priv->rxq);
4213 iwl3945_hw_txq_ctx_free(priv);
4214
4215 iwl3945_unset_hw_params(priv);
4216 iwl_clear_stations_table(priv);
4217
4218 /*netif_stop_queue(dev); */
4219 flush_workqueue(priv->workqueue);
4220
4221 /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4222 * priv->workqueue... so we can't take down the workqueue
4223 * until now... */
4224 destroy_workqueue(priv->workqueue);
4225 priv->workqueue = NULL;
4226 iwl_free_traffic_mem(priv);
4227
4228 free_irq(pdev->irq, priv);
4229 pci_disable_msi(pdev);
4230
4231 pci_iounmap(pdev, priv->hw_base);
4232 pci_release_regions(pdev);
4233 pci_disable_device(pdev);
4234 pci_set_drvdata(pdev, NULL);
4235
4236 iwl_free_channel_map(priv);
4237 iwlcore_free_geos(priv);
4238 kfree(priv->scan);
4239 if (priv->ibss_beacon)
4240 dev_kfree_skb(priv->ibss_beacon);
4241
4242 ieee80211_free_hw(priv->hw);
4243 }
4244
4245
4246 /*****************************************************************************
4247 *
4248 * driver and module entry point
4249 *
4250 *****************************************************************************/
4251
4252 static struct pci_driver iwl3945_driver = {
4253 .name = DRV_NAME,
4254 .id_table = iwl3945_hw_card_ids,
4255 .probe = iwl3945_pci_probe,
4256 .remove = __devexit_p(iwl3945_pci_remove),
4257 #ifdef CONFIG_PM
4258 .suspend = iwl_pci_suspend,
4259 .resume = iwl_pci_resume,
4260 #endif
4261 };
4262
4263 static int __init iwl3945_init(void)
4264 {
4265
4266 int ret;
4267 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4268 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4269
4270 ret = iwl3945_rate_control_register();
4271 if (ret) {
4272 printk(KERN_ERR DRV_NAME
4273 "Unable to register rate control algorithm: %d\n", ret);
4274 return ret;
4275 }
4276
4277 ret = pci_register_driver(&iwl3945_driver);
4278 if (ret) {
4279 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4280 goto error_register;
4281 }
4282
4283 return ret;
4284
4285 error_register:
4286 iwl3945_rate_control_unregister();
4287 return ret;
4288 }
4289
4290 static void __exit iwl3945_exit(void)
4291 {
4292 pci_unregister_driver(&iwl3945_driver);
4293 iwl3945_rate_control_unregister();
4294 }
4295
4296 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4297
4298 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4299 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4300 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4301 MODULE_PARM_DESC(swcrypto,
4302 "using software crypto (default 1 [software])\n");
4303 #ifdef CONFIG_IWLWIFI_DEBUG
4304 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4305 MODULE_PARM_DESC(debug, "debug output mask");
4306 #endif
4307 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4308 int, S_IRUGO);
4309 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4310 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4311 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4312
4313 module_exit(iwl3945_exit);
4314 module_init(iwl3945_init);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree