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iwlagn: move rx transport functions to iwl-trans-rx-pcie.c
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn-lib.c
blob4156316e108daffc05b7f12cd2852dad9cc42679
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
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 #include <linux/etherdevice.h>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/sched.h>
34
35 #include "iwl-dev.h"
36 #include "iwl-core.h"
37 #include "iwl-io.h"
38 #include "iwl-helpers.h"
39 #include "iwl-agn-hw.h"
40 #include "iwl-agn.h"
41 #include "iwl-sta.h"
42 #include "iwl-trans.h"
43
44 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
45 {
46 return le32_to_cpup((__le32 *)&tx_resp->status +
47 tx_resp->frame_count) & MAX_SN;
48 }
49
50 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
51 {
52 status &= TX_STATUS_MSK;
53
54 switch (status) {
55 case TX_STATUS_POSTPONE_DELAY:
56 priv->_agn.reply_tx_stats.pp_delay++;
57 break;
58 case TX_STATUS_POSTPONE_FEW_BYTES:
59 priv->_agn.reply_tx_stats.pp_few_bytes++;
60 break;
61 case TX_STATUS_POSTPONE_BT_PRIO:
62 priv->_agn.reply_tx_stats.pp_bt_prio++;
63 break;
64 case TX_STATUS_POSTPONE_QUIET_PERIOD:
65 priv->_agn.reply_tx_stats.pp_quiet_period++;
66 break;
67 case TX_STATUS_POSTPONE_CALC_TTAK:
68 priv->_agn.reply_tx_stats.pp_calc_ttak++;
69 break;
70 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
71 priv->_agn.reply_tx_stats.int_crossed_retry++;
72 break;
73 case TX_STATUS_FAIL_SHORT_LIMIT:
74 priv->_agn.reply_tx_stats.short_limit++;
75 break;
76 case TX_STATUS_FAIL_LONG_LIMIT:
77 priv->_agn.reply_tx_stats.long_limit++;
78 break;
79 case TX_STATUS_FAIL_FIFO_UNDERRUN:
80 priv->_agn.reply_tx_stats.fifo_underrun++;
81 break;
82 case TX_STATUS_FAIL_DRAIN_FLOW:
83 priv->_agn.reply_tx_stats.drain_flow++;
84 break;
85 case TX_STATUS_FAIL_RFKILL_FLUSH:
86 priv->_agn.reply_tx_stats.rfkill_flush++;
87 break;
88 case TX_STATUS_FAIL_LIFE_EXPIRE:
89 priv->_agn.reply_tx_stats.life_expire++;
90 break;
91 case TX_STATUS_FAIL_DEST_PS:
92 priv->_agn.reply_tx_stats.dest_ps++;
93 break;
94 case TX_STATUS_FAIL_HOST_ABORTED:
95 priv->_agn.reply_tx_stats.host_abort++;
96 break;
97 case TX_STATUS_FAIL_BT_RETRY:
98 priv->_agn.reply_tx_stats.bt_retry++;
99 break;
100 case TX_STATUS_FAIL_STA_INVALID:
101 priv->_agn.reply_tx_stats.sta_invalid++;
102 break;
103 case TX_STATUS_FAIL_FRAG_DROPPED:
104 priv->_agn.reply_tx_stats.frag_drop++;
105 break;
106 case TX_STATUS_FAIL_TID_DISABLE:
107 priv->_agn.reply_tx_stats.tid_disable++;
108 break;
109 case TX_STATUS_FAIL_FIFO_FLUSHED:
110 priv->_agn.reply_tx_stats.fifo_flush++;
111 break;
112 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
113 priv->_agn.reply_tx_stats.insuff_cf_poll++;
114 break;
115 case TX_STATUS_FAIL_PASSIVE_NO_RX:
116 priv->_agn.reply_tx_stats.fail_hw_drop++;
117 break;
118 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
119 priv->_agn.reply_tx_stats.sta_color_mismatch++;
120 break;
121 default:
122 priv->_agn.reply_tx_stats.unknown++;
123 break;
124 }
125 }
126
127 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
128 {
129 status &= AGG_TX_STATUS_MSK;
130
131 switch (status) {
132 case AGG_TX_STATE_UNDERRUN_MSK:
133 priv->_agn.reply_agg_tx_stats.underrun++;
134 break;
135 case AGG_TX_STATE_BT_PRIO_MSK:
136 priv->_agn.reply_agg_tx_stats.bt_prio++;
137 break;
138 case AGG_TX_STATE_FEW_BYTES_MSK:
139 priv->_agn.reply_agg_tx_stats.few_bytes++;
140 break;
141 case AGG_TX_STATE_ABORT_MSK:
142 priv->_agn.reply_agg_tx_stats.abort++;
143 break;
144 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
145 priv->_agn.reply_agg_tx_stats.last_sent_ttl++;
146 break;
147 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
148 priv->_agn.reply_agg_tx_stats.last_sent_try++;
149 break;
150 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
151 priv->_agn.reply_agg_tx_stats.last_sent_bt_kill++;
152 break;
153 case AGG_TX_STATE_SCD_QUERY_MSK:
154 priv->_agn.reply_agg_tx_stats.scd_query++;
155 break;
156 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
157 priv->_agn.reply_agg_tx_stats.bad_crc32++;
158 break;
159 case AGG_TX_STATE_RESPONSE_MSK:
160 priv->_agn.reply_agg_tx_stats.response++;
161 break;
162 case AGG_TX_STATE_DUMP_TX_MSK:
163 priv->_agn.reply_agg_tx_stats.dump_tx++;
164 break;
165 case AGG_TX_STATE_DELAY_TX_MSK:
166 priv->_agn.reply_agg_tx_stats.delay_tx++;
167 break;
168 default:
169 priv->_agn.reply_agg_tx_stats.unknown++;
170 break;
171 }
172 }
173
174 static void iwlagn_set_tx_status(struct iwl_priv *priv,
175 struct ieee80211_tx_info *info,
176 struct iwl_rxon_context *ctx,
177 struct iwlagn_tx_resp *tx_resp,
178 int txq_id, bool is_agg)
179 {
180 u16 status = le16_to_cpu(tx_resp->status.status);
181
182 info->status.rates[0].count = tx_resp->failure_frame + 1;
183 if (is_agg)
184 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
185 info->flags |= iwl_tx_status_to_mac80211(status);
186 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
187 info);
188 if (!iwl_is_tx_success(status))
189 iwlagn_count_tx_err_status(priv, status);
190
191 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
192 iwl_is_associated_ctx(ctx) && ctx->vif &&
193 ctx->vif->type == NL80211_IFTYPE_STATION) {
194 ctx->last_tx_rejected = true;
195 iwl_stop_queue(priv, &priv->txq[txq_id]);
196 }
197
198 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) rate_n_flags "
199 "0x%x retries %d\n",
200 txq_id,
201 iwl_get_tx_fail_reason(status), status,
202 le32_to_cpu(tx_resp->rate_n_flags),
203 tx_resp->failure_frame);
204 }
205
206 #ifdef CONFIG_IWLWIFI_DEBUG
207 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
208
209 const char *iwl_get_agg_tx_fail_reason(u16 status)
210 {
211 status &= AGG_TX_STATUS_MSK;
212 switch (status) {
213 case AGG_TX_STATE_TRANSMITTED:
214 return "SUCCESS";
215 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
216 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
217 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
218 AGG_TX_STATE_FAIL(ABORT_MSK);
219 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
220 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
221 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
222 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
223 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
224 AGG_TX_STATE_FAIL(RESPONSE_MSK);
225 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
226 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
227 }
228
229 return "UNKNOWN";
230 }
231 #endif /* CONFIG_IWLWIFI_DEBUG */
232
233 static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv,
234 struct iwl_ht_agg *agg,
235 struct iwlagn_tx_resp *tx_resp,
236 int txq_id, u16 start_idx)
237 {
238 u16 status;
239 struct agg_tx_status *frame_status = &tx_resp->status;
240 struct ieee80211_hdr *hdr = NULL;
241 int i, sh, idx;
242 u16 seq;
243
244 if (agg->wait_for_ba)
245 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
246
247 agg->frame_count = tx_resp->frame_count;
248 agg->start_idx = start_idx;
249 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
250 agg->bitmap = 0;
251
252 /* # frames attempted by Tx command */
253 if (agg->frame_count == 1) {
254 struct iwl_tx_info *txb;
255
256 /* Only one frame was attempted; no block-ack will arrive */
257 idx = start_idx;
258
259 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
260 agg->frame_count, agg->start_idx, idx);
261 txb = &priv->txq[txq_id].txb[idx];
262 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(txb->skb),
263 txb->ctx, tx_resp, txq_id, true);
264 agg->wait_for_ba = 0;
265 } else {
266 /* Two or more frames were attempted; expect block-ack */
267 u64 bitmap = 0;
268
269 /*
270 * Start is the lowest frame sent. It may not be the first
271 * frame in the batch; we figure this out dynamically during
272 * the following loop.
273 */
274 int start = agg->start_idx;
275
276 /* Construct bit-map of pending frames within Tx window */
277 for (i = 0; i < agg->frame_count; i++) {
278 u16 sc;
279 status = le16_to_cpu(frame_status[i].status);
280 seq = le16_to_cpu(frame_status[i].sequence);
281 idx = SEQ_TO_INDEX(seq);
282 txq_id = SEQ_TO_QUEUE(seq);
283
284 if (status & AGG_TX_STATUS_MSK)
285 iwlagn_count_agg_tx_err_status(priv, status);
286
287 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
288 AGG_TX_STATE_ABORT_MSK))
289 continue;
290
291 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
292 agg->frame_count, txq_id, idx);
293 IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
294 "try-count (0x%08x)\n",
295 iwl_get_agg_tx_fail_reason(status),
296 status & AGG_TX_STATUS_MSK,
297 status & AGG_TX_TRY_MSK);
298
299 hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
300 if (!hdr) {
301 IWL_ERR(priv,
302 "BUG_ON idx doesn't point to valid skb"
303 " idx=%d, txq_id=%d\n", idx, txq_id);
304 return -1;
305 }
306
307 sc = le16_to_cpu(hdr->seq_ctrl);
308 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
309 IWL_ERR(priv,
310 "BUG_ON idx doesn't match seq control"
311 " idx=%d, seq_idx=%d, seq=%d\n",
312 idx, SEQ_TO_SN(sc),
313 hdr->seq_ctrl);
314 return -1;
315 }
316
317 IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
318 i, idx, SEQ_TO_SN(sc));
319
320 /*
321 * sh -> how many frames ahead of the starting frame is
322 * the current one?
323 *
324 * Note that all frames sent in the batch must be in a
325 * 64-frame window, so this number should be in [0,63].
326 * If outside of this window, then we've found a new
327 * "first" frame in the batch and need to change start.
328 */
329 sh = idx - start;
330
331 /*
332 * If >= 64, out of window. start must be at the front
333 * of the circular buffer, idx must be near the end of
334 * the buffer, and idx is the new "first" frame. Shift
335 * the indices around.
336 */
337 if (sh >= 64) {
338 /* Shift bitmap by start - idx, wrapped */
339 sh = 0x100 - idx + start;
340 bitmap = bitmap << sh;
341 /* Now idx is the new start so sh = 0 */
342 sh = 0;
343 start = idx;
344 /*
345 * If <= -64 then wraps the 256-pkt circular buffer
346 * (e.g., start = 255 and idx = 0, sh should be 1)
347 */
348 } else if (sh <= -64) {
349 sh = 0x100 - start + idx;
350 /*
351 * If < 0 but > -64, out of window. idx is before start
352 * but not wrapped. Shift the indices around.
353 */
354 } else if (sh < 0) {
355 /* Shift by how far start is ahead of idx */
356 sh = start - idx;
357 bitmap = bitmap << sh;
358 /* Now idx is the new start so sh = 0 */
359 start = idx;
360 sh = 0;
361 }
362 /* Sequence number start + sh was sent in this batch */
363 bitmap |= 1ULL << sh;
364 IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
365 start, (unsigned long long)bitmap);
366 }
367
368 /*
369 * Store the bitmap and possibly the new start, if we wrapped
370 * the buffer above
371 */
372 agg->bitmap = bitmap;
373 agg->start_idx = start;
374 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
375 agg->frame_count, agg->start_idx,
376 (unsigned long long)agg->bitmap);
377
378 if (bitmap)
379 agg->wait_for_ba = 1;
380 }
381 return 0;
382 }
383
384 void iwl_check_abort_status(struct iwl_priv *priv,
385 u8 frame_count, u32 status)
386 {
387 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
388 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
389 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
390 queue_work(priv->workqueue, &priv->tx_flush);
391 }
392 }
393
394 static void iwlagn_rx_reply_tx(struct iwl_priv *priv,
395 struct iwl_rx_mem_buffer *rxb)
396 {
397 struct iwl_rx_packet *pkt = rxb_addr(rxb);
398 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
399 int txq_id = SEQ_TO_QUEUE(sequence);
400 int index = SEQ_TO_INDEX(sequence);
401 struct iwl_tx_queue *txq = &priv->txq[txq_id];
402 struct ieee80211_tx_info *info;
403 struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
404 struct iwl_tx_info *txb;
405 u32 status = le16_to_cpu(tx_resp->status.status);
406 int tid;
407 int sta_id;
408 int freed;
409 unsigned long flags;
410
411 if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
412 IWL_ERR(priv, "%s: Read index for DMA queue txq_id (%d) "
413 "index %d is out of range [0-%d] %d %d\n", __func__,
414 txq_id, index, txq->q.n_bd, txq->q.write_ptr,
415 txq->q.read_ptr);
416 return;
417 }
418
419 txq->time_stamp = jiffies;
420 txb = &txq->txb[txq->q.read_ptr];
421 info = IEEE80211_SKB_CB(txb->skb);
422 memset(&info->status, 0, sizeof(info->status));
423
424 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
425 IWLAGN_TX_RES_TID_POS;
426 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
427 IWLAGN_TX_RES_RA_POS;
428
429 spin_lock_irqsave(&priv->sta_lock, flags);
430 if (txq->sched_retry) {
431 const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp);
432 struct iwl_ht_agg *agg;
433
434 agg = &priv->stations[sta_id].tid[tid].agg;
435 /*
436 * If the BT kill count is non-zero, we'll get this
437 * notification again.
438 */
439 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
440 priv->cfg->bt_params &&
441 priv->cfg->bt_params->advanced_bt_coexist) {
442 IWL_DEBUG_COEX(priv, "receive reply tx with bt_kill\n");
443 }
444 iwlagn_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
445
446 /* check if BAR is needed */
447 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
448 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
449
450 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
451 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
452 IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim "
453 "scd_ssn=%d idx=%d txq=%d swq=%d\n",
454 scd_ssn , index, txq_id, txq->swq_id);
455
456 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
457 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
458
459 if (priv->mac80211_registered &&
460 (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
461 (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
462 iwl_wake_queue(priv, txq);
463 }
464 } else {
465 iwlagn_set_tx_status(priv, info, txb->ctx, tx_resp,
466 txq_id, false);
467 freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
468 iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
469
470 if (priv->mac80211_registered &&
471 iwl_queue_space(&txq->q) > txq->q.low_mark &&
472 status != TX_STATUS_FAIL_PASSIVE_NO_RX)
473 iwl_wake_queue(priv, txq);
474 }
475
476 iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
477
478 iwl_check_abort_status(priv, tx_resp->frame_count, status);
479 spin_unlock_irqrestore(&priv->sta_lock, flags);
480 }
481
482 void iwlagn_rx_handler_setup(struct iwl_priv *priv)
483 {
484 /* init calibration handlers */
485 priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
486 iwlagn_rx_calib_result;
487 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
488
489 /* set up notification wait support */
490 spin_lock_init(&priv->_agn.notif_wait_lock);
491 INIT_LIST_HEAD(&priv->_agn.notif_waits);
492 init_waitqueue_head(&priv->_agn.notif_waitq);
493 }
494
495 void iwlagn_setup_deferred_work(struct iwl_priv *priv)
496 {
497 /*
498 * nothing need to be done here anymore
499 * still keep for future use if needed
500 */
501 }
502
503 int iwlagn_hw_valid_rtc_data_addr(u32 addr)
504 {
505 return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
506 (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
507 }
508
509 int iwlagn_send_tx_power(struct iwl_priv *priv)
510 {
511 struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
512 u8 tx_ant_cfg_cmd;
513
514 if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
515 "TX Power requested while scanning!\n"))
516 return -EAGAIN;
517
518 /* half dBm need to multiply */
519 tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
520
521 if (priv->tx_power_lmt_in_half_dbm &&
522 priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) {
523 /*
524 * For the newer devices which using enhanced/extend tx power
525 * table in EEPROM, the format is in half dBm. driver need to
526 * convert to dBm format before report to mac80211.
527 * By doing so, there is a possibility of 1/2 dBm resolution
528 * lost. driver will perform "round-up" operation before
529 * reporting, but it will cause 1/2 dBm tx power over the
530 * regulatory limit. Perform the checking here, if the
531 * "tx_power_user_lmt" is higher than EEPROM value (in
532 * half-dBm format), lower the tx power based on EEPROM
533 */
534 tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm;
535 }
536 tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
537 tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
538
539 if (IWL_UCODE_API(priv->ucode_ver) == 1)
540 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
541 else
542 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
543
544 return trans_send_cmd_pdu(priv, tx_ant_cfg_cmd, CMD_SYNC,
545 sizeof(tx_power_cmd), &tx_power_cmd);
546 }
547
548 void iwlagn_temperature(struct iwl_priv *priv)
549 {
550 /* store temperature from correct statistics (in Celsius) */
551 priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
552 iwl_tt_handler(priv);
553 }
554
555 u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
556 {
557 struct iwl_eeprom_calib_hdr {
558 u8 version;
559 u8 pa_type;
560 u16 voltage;
561 } *hdr;
562
563 hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
564 EEPROM_CALIB_ALL);
565 return hdr->version;
566
567 }
568
569 /*
570 * EEPROM
571 */
572 static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
573 {
574 u16 offset = 0;
575
576 if ((address & INDIRECT_ADDRESS) == 0)
577 return address;
578
579 switch (address & INDIRECT_TYPE_MSK) {
580 case INDIRECT_HOST:
581 offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
582 break;
583 case INDIRECT_GENERAL:
584 offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
585 break;
586 case INDIRECT_REGULATORY:
587 offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
588 break;
589 case INDIRECT_TXP_LIMIT:
590 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT);
591 break;
592 case INDIRECT_TXP_LIMIT_SIZE:
593 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT_SIZE);
594 break;
595 case INDIRECT_CALIBRATION:
596 offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
597 break;
598 case INDIRECT_PROCESS_ADJST:
599 offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
600 break;
601 case INDIRECT_OTHERS:
602 offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
603 break;
604 default:
605 IWL_ERR(priv, "illegal indirect type: 0x%X\n",
606 address & INDIRECT_TYPE_MSK);
607 break;
608 }
609
610 /* translate the offset from words to byte */
611 return (address & ADDRESS_MSK) + (offset << 1);
612 }
613
614 const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
615 {
616 u32 address = eeprom_indirect_address(priv, offset);
617 BUG_ON(address >= priv->cfg->base_params->eeprom_size);
618 return &priv->eeprom[address];
619 }
620
621 struct iwl_mod_params iwlagn_mod_params = {
622 .amsdu_size_8K = 1,
623 .restart_fw = 1,
624 .plcp_check = true,
625 .bt_coex_active = true,
626 .no_sleep_autoadjust = true,
627 .power_level = IWL_POWER_INDEX_1,
628 /* the rest are 0 by default */
629 };
630
631 static void iwlagn_set_pwr_vmain(struct iwl_priv *priv)
632 {
633 /*
634 * (for documentation purposes)
635 * to set power to V_AUX, do:
636
637 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
638 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
639 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
640 ~APMG_PS_CTRL_MSK_PWR_SRC);
641 */
642
643 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
644 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
645 ~APMG_PS_CTRL_MSK_PWR_SRC);
646 }
647
648 /*TODO: this function should move to transport layer */
649 int iwlagn_hw_nic_init(struct iwl_priv *priv)
650 {
651 unsigned long flags;
652
653 /* nic_init */
654 spin_lock_irqsave(&priv->lock, flags);
655 iwl_apm_init(priv);
656
657 /* Set interrupt coalescing calibration timer to default (512 usecs) */
658 iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF);
659
660 spin_unlock_irqrestore(&priv->lock, flags);
661
662 iwlagn_set_pwr_vmain(priv);
663
664 priv->cfg->lib->nic_config(priv);
665
666 /* Allocate the RX queue, or reset if it is already allocated */
667 trans_rx_init(priv);
668
669 /* Allocate or reset and init all Tx and Command queues */
670 if (trans_tx_init(priv))
671 return -ENOMEM;
672
673 if (priv->cfg->base_params->shadow_reg_enable) {
674 /* enable shadow regs in HW */
675 iwl_set_bit(priv, CSR_MAC_SHADOW_REG_CTRL,
676 0x800FFFFF);
677 }
678
679 set_bit(STATUS_INIT, &priv->status);
680
681 return 0;
682 }
683
684 int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
685 {
686 int idx = 0;
687 int band_offset = 0;
688
689 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
690 if (rate_n_flags & RATE_MCS_HT_MSK) {
691 idx = (rate_n_flags & 0xff);
692 return idx;
693 /* Legacy rate format, search for match in table */
694 } else {
695 if (band == IEEE80211_BAND_5GHZ)
696 band_offset = IWL_FIRST_OFDM_RATE;
697 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
698 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
699 return idx - band_offset;
700 }
701
702 return -1;
703 }
704
705 static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
706 struct ieee80211_vif *vif,
707 enum ieee80211_band band,
708 struct iwl_scan_channel *scan_ch)
709 {
710 const struct ieee80211_supported_band *sband;
711 u16 passive_dwell = 0;
712 u16 active_dwell = 0;
713 int added = 0;
714 u16 channel = 0;
715
716 sband = iwl_get_hw_mode(priv, band);
717 if (!sband) {
718 IWL_ERR(priv, "invalid band\n");
719 return added;
720 }
721
722 active_dwell = iwl_get_active_dwell_time(priv, band, 0);
723 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
724
725 if (passive_dwell <= active_dwell)
726 passive_dwell = active_dwell + 1;
727
728 channel = iwl_get_single_channel_number(priv, band);
729 if (channel) {
730 scan_ch->channel = cpu_to_le16(channel);
731 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
732 scan_ch->active_dwell = cpu_to_le16(active_dwell);
733 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
734 /* Set txpower levels to defaults */
735 scan_ch->dsp_atten = 110;
736 if (band == IEEE80211_BAND_5GHZ)
737 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
738 else
739 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
740 added++;
741 } else
742 IWL_ERR(priv, "no valid channel found\n");
743 return added;
744 }
745
746 static int iwl_get_channels_for_scan(struct iwl_priv *priv,
747 struct ieee80211_vif *vif,
748 enum ieee80211_band band,
749 u8 is_active, u8 n_probes,
750 struct iwl_scan_channel *scan_ch)
751 {
752 struct ieee80211_channel *chan;
753 const struct ieee80211_supported_band *sband;
754 const struct iwl_channel_info *ch_info;
755 u16 passive_dwell = 0;
756 u16 active_dwell = 0;
757 int added, i;
758 u16 channel;
759
760 sband = iwl_get_hw_mode(priv, band);
761 if (!sband)
762 return 0;
763
764 active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
765 passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
766
767 if (passive_dwell <= active_dwell)
768 passive_dwell = active_dwell + 1;
769
770 for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
771 chan = priv->scan_request->channels[i];
772
773 if (chan->band != band)
774 continue;
775
776 channel = chan->hw_value;
777 scan_ch->channel = cpu_to_le16(channel);
778
779 ch_info = iwl_get_channel_info(priv, band, channel);
780 if (!is_channel_valid(ch_info)) {
781 IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
782 channel);
783 continue;
784 }
785
786 if (!is_active || is_channel_passive(ch_info) ||
787 (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
788 scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
789 else
790 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
791
792 if (n_probes)
793 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
794
795 scan_ch->active_dwell = cpu_to_le16(active_dwell);
796 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
797
798 /* Set txpower levels to defaults */
799 scan_ch->dsp_atten = 110;
800
801 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
802 * power level:
803 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
804 */
805 if (band == IEEE80211_BAND_5GHZ)
806 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
807 else
808 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
809
810 IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
811 channel, le32_to_cpu(scan_ch->type),
812 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
813 "ACTIVE" : "PASSIVE",
814 (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
815 active_dwell : passive_dwell);
816
817 scan_ch++;
818 added++;
819 }
820
821 IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
822 return added;
823 }
824
825 static int iwl_fill_offch_tx(struct iwl_priv *priv, void *data, size_t maxlen)
826 {
827 struct sk_buff *skb = priv->_agn.offchan_tx_skb;
828
829 if (skb->len < maxlen)
830 maxlen = skb->len;
831
832 memcpy(data, skb->data, maxlen);
833
834 return maxlen;
835 }
836
837 int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
838 {
839 struct iwl_host_cmd cmd = {
840 .id = REPLY_SCAN_CMD,
841 .len = { sizeof(struct iwl_scan_cmd), },
842 .flags = CMD_SYNC,
843 };
844 struct iwl_scan_cmd *scan;
845 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
846 u32 rate_flags = 0;
847 u16 cmd_len;
848 u16 rx_chain = 0;
849 enum ieee80211_band band;
850 u8 n_probes = 0;
851 u8 rx_ant = priv->hw_params.valid_rx_ant;
852 u8 rate;
853 bool is_active = false;
854 int chan_mod;
855 u8 active_chains;
856 u8 scan_tx_antennas = priv->hw_params.valid_tx_ant;
857 int ret;
858
859 lockdep_assert_held(&priv->mutex);
860
861 if (vif)
862 ctx = iwl_rxon_ctx_from_vif(vif);
863
864 if (!priv->scan_cmd) {
865 priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
866 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
867 if (!priv->scan_cmd) {
868 IWL_DEBUG_SCAN(priv,
869 "fail to allocate memory for scan\n");
870 return -ENOMEM;
871 }
872 }
873 scan = priv->scan_cmd;
874 memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
875
876 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
877 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
878
879 if (priv->scan_type != IWL_SCAN_OFFCH_TX &&
880 iwl_is_any_associated(priv)) {
881 u16 interval = 0;
882 u32 extra;
883 u32 suspend_time = 100;
884 u32 scan_suspend_time = 100;
885
886 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
887 switch (priv->scan_type) {
888 case IWL_SCAN_OFFCH_TX:
889 WARN_ON(1);
890 break;
891 case IWL_SCAN_RADIO_RESET:
892 interval = 0;
893 break;
894 case IWL_SCAN_NORMAL:
895 interval = vif->bss_conf.beacon_int;
896 break;
897 }
898
899 scan->suspend_time = 0;
900 scan->max_out_time = cpu_to_le32(200 * 1024);
901 if (!interval)
902 interval = suspend_time;
903
904 extra = (suspend_time / interval) << 22;
905 scan_suspend_time = (extra |
906 ((suspend_time % interval) * 1024));
907 scan->suspend_time = cpu_to_le32(scan_suspend_time);
908 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
909 scan_suspend_time, interval);
910 } else if (priv->scan_type == IWL_SCAN_OFFCH_TX) {
911 scan->suspend_time = 0;
912 scan->max_out_time =
913 cpu_to_le32(1024 * priv->_agn.offchan_tx_timeout);
914 }
915
916 switch (priv->scan_type) {
917 case IWL_SCAN_RADIO_RESET:
918 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
919 break;
920 case IWL_SCAN_NORMAL:
921 if (priv->scan_request->n_ssids) {
922 int i, p = 0;
923 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
924 for (i = 0; i < priv->scan_request->n_ssids; i++) {
925 /* always does wildcard anyway */
926 if (!priv->scan_request->ssids[i].ssid_len)
927 continue;
928 scan->direct_scan[p].id = WLAN_EID_SSID;
929 scan->direct_scan[p].len =
930 priv->scan_request->ssids[i].ssid_len;
931 memcpy(scan->direct_scan[p].ssid,
932 priv->scan_request->ssids[i].ssid,
933 priv->scan_request->ssids[i].ssid_len);
934 n_probes++;
935 p++;
936 }
937 is_active = true;
938 } else
939 IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
940 break;
941 case IWL_SCAN_OFFCH_TX:
942 IWL_DEBUG_SCAN(priv, "Start offchannel TX scan.\n");
943 break;
944 }
945
946 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
947 scan->tx_cmd.sta_id = ctx->bcast_sta_id;
948 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
949
950 switch (priv->scan_band) {
951 case IEEE80211_BAND_2GHZ:
952 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
953 chan_mod = le32_to_cpu(
954 priv->contexts[IWL_RXON_CTX_BSS].active.flags &
955 RXON_FLG_CHANNEL_MODE_MSK)
956 >> RXON_FLG_CHANNEL_MODE_POS;
957 if (chan_mod == CHANNEL_MODE_PURE_40) {
958 rate = IWL_RATE_6M_PLCP;
959 } else {
960 rate = IWL_RATE_1M_PLCP;
961 rate_flags = RATE_MCS_CCK_MSK;
962 }
963 /*
964 * Internal scans are passive, so we can indiscriminately set
965 * the BT ignore flag on 2.4 GHz since it applies to TX only.
966 */
967 if (priv->cfg->bt_params &&
968 priv->cfg->bt_params->advanced_bt_coexist)
969 scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
970 break;
971 case IEEE80211_BAND_5GHZ:
972 rate = IWL_RATE_6M_PLCP;
973 break;
974 default:
975 IWL_WARN(priv, "Invalid scan band\n");
976 return -EIO;
977 }
978
979 /*
980 * If active scanning is requested but a certain channel is
981 * marked passive, we can do active scanning if we detect
982 * transmissions.
983 *
984 * There is an issue with some firmware versions that triggers
985 * a sysassert on a "good CRC threshold" of zero (== disabled),
986 * on a radar channel even though this means that we should NOT
987 * send probes.
988 *
989 * The "good CRC threshold" is the number of frames that we
990 * need to receive during our dwell time on a channel before
991 * sending out probes -- setting this to a huge value will
992 * mean we never reach it, but at the same time work around
993 * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
994 * here instead of IWL_GOOD_CRC_TH_DISABLED.
995 *
996 * This was fixed in later versions along with some other
997 * scan changes, and the threshold behaves as a flag in those
998 * versions.
999 */
1000 if (priv->new_scan_threshold_behaviour)
1001 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
1002 IWL_GOOD_CRC_TH_DISABLED;
1003 else
1004 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
1005 IWL_GOOD_CRC_TH_NEVER;
1006
1007 band = priv->scan_band;
1008
1009 if (priv->cfg->scan_rx_antennas[band])
1010 rx_ant = priv->cfg->scan_rx_antennas[band];
1011
1012 if (band == IEEE80211_BAND_2GHZ &&
1013 priv->cfg->bt_params &&
1014 priv->cfg->bt_params->advanced_bt_coexist) {
1015 /* transmit 2.4 GHz probes only on first antenna */
1016 scan_tx_antennas = first_antenna(scan_tx_antennas);
1017 }
1018
1019 priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band],
1020 scan_tx_antennas);
1021 rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
1022 scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
1023
1024 /* In power save mode use one chain, otherwise use all chains */
1025 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
1026 /* rx_ant has been set to all valid chains previously */
1027 active_chains = rx_ant &
1028 ((u8)(priv->chain_noise_data.active_chains));
1029 if (!active_chains)
1030 active_chains = rx_ant;
1031
1032 IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
1033 priv->chain_noise_data.active_chains);
1034
1035 rx_ant = first_antenna(active_chains);
1036 }
1037 if (priv->cfg->bt_params &&
1038 priv->cfg->bt_params->advanced_bt_coexist &&
1039 priv->bt_full_concurrent) {
1040 /* operated as 1x1 in full concurrency mode */
1041 rx_ant = first_antenna(rx_ant);
1042 }
1043
1044 /* MIMO is not used here, but value is required */
1045 rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
1046 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1047 rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
1048 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1049 scan->rx_chain = cpu_to_le16(rx_chain);
1050 switch (priv->scan_type) {
1051 case IWL_SCAN_NORMAL:
1052 cmd_len = iwl_fill_probe_req(priv,
1053 (struct ieee80211_mgmt *)scan->data,
1054 vif->addr,
1055 priv->scan_request->ie,
1056 priv->scan_request->ie_len,
1057 IWL_MAX_SCAN_SIZE - sizeof(*scan));
1058 break;
1059 case IWL_SCAN_RADIO_RESET:
1060 /* use bcast addr, will not be transmitted but must be valid */
1061 cmd_len = iwl_fill_probe_req(priv,
1062 (struct ieee80211_mgmt *)scan->data,
1063 iwl_bcast_addr, NULL, 0,
1064 IWL_MAX_SCAN_SIZE - sizeof(*scan));
1065 break;
1066 case IWL_SCAN_OFFCH_TX:
1067 cmd_len = iwl_fill_offch_tx(priv, scan->data,
1068 IWL_MAX_SCAN_SIZE
1069 - sizeof(*scan)
1070 - sizeof(struct iwl_scan_channel));
1071 scan->scan_flags |= IWL_SCAN_FLAGS_ACTION_FRAME_TX;
1072 break;
1073 default:
1074 BUG();
1075 }
1076 scan->tx_cmd.len = cpu_to_le16(cmd_len);
1077
1078 scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
1079 RXON_FILTER_BCON_AWARE_MSK);
1080
1081 switch (priv->scan_type) {
1082 case IWL_SCAN_RADIO_RESET:
1083 scan->channel_count =
1084 iwl_get_single_channel_for_scan(priv, vif, band,
1085 (void *)&scan->data[cmd_len]);
1086 break;
1087 case IWL_SCAN_NORMAL:
1088 scan->channel_count =
1089 iwl_get_channels_for_scan(priv, vif, band,
1090 is_active, n_probes,
1091 (void *)&scan->data[cmd_len]);
1092 break;
1093 case IWL_SCAN_OFFCH_TX: {
1094 struct iwl_scan_channel *scan_ch;
1095
1096 scan->channel_count = 1;
1097
1098 scan_ch = (void *)&scan->data[cmd_len];
1099 scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
1100 scan_ch->channel =
1101 cpu_to_le16(priv->_agn.offchan_tx_chan->hw_value);
1102 scan_ch->active_dwell =
1103 cpu_to_le16(priv->_agn.offchan_tx_timeout);
1104 scan_ch->passive_dwell = 0;
1105
1106 /* Set txpower levels to defaults */
1107 scan_ch->dsp_atten = 110;
1108
1109 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1110 * power level:
1111 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
1112 */
1113 if (priv->_agn.offchan_tx_chan->band == IEEE80211_BAND_5GHZ)
1114 scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
1115 else
1116 scan_ch->tx_gain = ((1 << 5) | (5 << 3));
1117 }
1118 break;
1119 }
1120
1121 if (scan->channel_count == 0) {
1122 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
1123 return -EIO;
1124 }
1125
1126 cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
1127 scan->channel_count * sizeof(struct iwl_scan_channel);
1128 cmd.data[0] = scan;
1129 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1130 scan->len = cpu_to_le16(cmd.len[0]);
1131
1132 /* set scan bit here for PAN params */
1133 set_bit(STATUS_SCAN_HW, &priv->status);
1134
1135 ret = iwlagn_set_pan_params(priv);
1136 if (ret)
1137 return ret;
1138
1139 ret = trans_send_cmd(priv, &cmd);
1140 if (ret) {
1141 clear_bit(STATUS_SCAN_HW, &priv->status);
1142 iwlagn_set_pan_params(priv);
1143 }
1144
1145 return ret;
1146 }
1147
1148 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
1149 struct ieee80211_vif *vif, bool add)
1150 {
1151 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1152
1153 if (add)
1154 return iwlagn_add_bssid_station(priv, vif_priv->ctx,
1155 vif->bss_conf.bssid,
1156 &vif_priv->ibss_bssid_sta_id);
1157 return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
1158 vif->bss_conf.bssid);
1159 }
1160
1161 void iwl_free_tfds_in_queue(struct iwl_priv *priv,
1162 int sta_id, int tid, int freed)
1163 {
1164 lockdep_assert_held(&priv->sta_lock);
1165
1166 if (priv->stations[sta_id].tid[tid].tfds_in_queue >= freed)
1167 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
1168 else {
1169 IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n",
1170 priv->stations[sta_id].tid[tid].tfds_in_queue,
1171 freed);
1172 priv->stations[sta_id].tid[tid].tfds_in_queue = 0;
1173 }
1174 }
1175
1176 #define IWL_FLUSH_WAIT_MS 2000
1177
1178 int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv)
1179 {
1180 struct iwl_tx_queue *txq;
1181 struct iwl_queue *q;
1182 int cnt;
1183 unsigned long now = jiffies;
1184 int ret = 0;
1185
1186 /* waiting for all the tx frames complete might take a while */
1187 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1188 if (cnt == priv->cmd_queue)
1189 continue;
1190 txq = &priv->txq[cnt];
1191 q = &txq->q;
1192 while (q->read_ptr != q->write_ptr && !time_after(jiffies,
1193 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
1194 msleep(1);
1195
1196 if (q->read_ptr != q->write_ptr) {
1197 IWL_ERR(priv, "fail to flush all tx fifo queues\n");
1198 ret = -ETIMEDOUT;
1199 break;
1200 }
1201 }
1202 return ret;
1203 }
1204
1205 #define IWL_TX_QUEUE_MSK 0xfffff
1206
1207 /**
1208 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
1209 *
1210 * pre-requirements:
1211 * 1. acquire mutex before calling
1212 * 2. make sure rf is on and not in exit state
1213 */
1214 int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1215 {
1216 struct iwl_txfifo_flush_cmd flush_cmd;
1217 struct iwl_host_cmd cmd = {
1218 .id = REPLY_TXFIFO_FLUSH,
1219 .len = { sizeof(struct iwl_txfifo_flush_cmd), },
1220 .flags = CMD_SYNC,
1221 .data = { &flush_cmd, },
1222 };
1223
1224 might_sleep();
1225
1226 memset(&flush_cmd, 0, sizeof(flush_cmd));
1227 if (flush_control & BIT(IWL_RXON_CTX_BSS))
1228 flush_cmd.fifo_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
1229 IWL_SCD_BE_MSK | IWL_SCD_BK_MSK |
1230 IWL_SCD_MGMT_MSK;
1231 if ((flush_control & BIT(IWL_RXON_CTX_PAN)) &&
1232 (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
1233 flush_cmd.fifo_control |= IWL_PAN_SCD_VO_MSK |
1234 IWL_PAN_SCD_VI_MSK | IWL_PAN_SCD_BE_MSK |
1235 IWL_PAN_SCD_BK_MSK | IWL_PAN_SCD_MGMT_MSK |
1236 IWL_PAN_SCD_MULTICAST_MSK;
1237
1238 if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
1239 flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;
1240
1241 IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
1242 flush_cmd.fifo_control);
1243 flush_cmd.flush_control = cpu_to_le16(flush_control);
1244
1245 return trans_send_cmd(priv, &cmd);
1246 }
1247
1248 void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
1249 {
1250 mutex_lock(&priv->mutex);
1251 ieee80211_stop_queues(priv->hw);
1252 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1253 IWL_ERR(priv, "flush request fail\n");
1254 goto done;
1255 }
1256 IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
1257 iwlagn_wait_tx_queue_empty(priv);
1258 done:
1259 ieee80211_wake_queues(priv->hw);
1260 mutex_unlock(&priv->mutex);
1261 }
1262
1263 /*
1264 * BT coex
1265 */
1266 /*
1267 * Macros to access the lookup table.
1268 *
1269 * The lookup table has 7 inputs: bt3_prio, bt3_txrx, bt_rf_act, wifi_req,
1270 * wifi_prio, wifi_txrx and wifi_sh_ant_req.
1271 *
1272 * It has three outputs: WLAN_ACTIVE, WLAN_KILL and ANT_SWITCH
1273 *
1274 * The format is that "registers" 8 through 11 contain the WLAN_ACTIVE bits
1275 * one after another in 32-bit registers, and "registers" 0 through 7 contain
1276 * the WLAN_KILL and ANT_SWITCH bits interleaved (in that order).
1277 *
1278 * These macros encode that format.
1279 */
1280 #define LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, wifi_req, wifi_prio, \
1281 wifi_txrx, wifi_sh_ant_req) \
1282 (bt3_prio | (bt3_txrx << 1) | (bt_rf_act << 2) | (wifi_req << 3) | \
1283 (wifi_prio << 4) | (wifi_txrx << 5) | (wifi_sh_ant_req << 6))
1284
1285 #define LUT_PTA_WLAN_ACTIVE_OP(lut, op, val) \
1286 lut[8 + ((val) >> 5)] op (cpu_to_le32(BIT((val) & 0x1f)))
1287 #define LUT_TEST_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1288 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1289 (!!(LUT_PTA_WLAN_ACTIVE_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, \
1290 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1291 wifi_sh_ant_req))))
1292 #define LUT_SET_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1293 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1294 LUT_PTA_WLAN_ACTIVE_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, \
1295 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1296 wifi_sh_ant_req))
1297 #define LUT_CLEAR_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, \
1298 wifi_req, wifi_prio, wifi_txrx, \
1299 wifi_sh_ant_req) \
1300 LUT_PTA_WLAN_ACTIVE_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, \
1301 bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
1302 wifi_sh_ant_req))
1303
1304 #define LUT_WLAN_KILL_OP(lut, op, val) \
1305 lut[(val) >> 4] op (cpu_to_le32(BIT(((val) << 1) & 0x1e)))
1306 #define LUT_TEST_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1307 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1308 (!!(LUT_WLAN_KILL_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1309 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))))
1310 #define LUT_SET_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1311 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1312 LUT_WLAN_KILL_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1313 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1314 #define LUT_CLEAR_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1315 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1316 LUT_WLAN_KILL_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1317 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1318
1319 #define LUT_ANT_SWITCH_OP(lut, op, val) \
1320 lut[(val) >> 4] op (cpu_to_le32(BIT((((val) << 1) & 0x1e) + 1)))
1321 #define LUT_TEST_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1322 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1323 (!!(LUT_ANT_SWITCH_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1324 wifi_req, wifi_prio, wifi_txrx, \
1325 wifi_sh_ant_req))))
1326 #define LUT_SET_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1327 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1328 LUT_ANT_SWITCH_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1329 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1330 #define LUT_CLEAR_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
1331 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
1332 LUT_ANT_SWITCH_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
1333 wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
1334
1335 static const __le32 iwlagn_def_3w_lookup[12] = {
1336 cpu_to_le32(0xaaaaaaaa),
1337 cpu_to_le32(0xaaaaaaaa),
1338 cpu_to_le32(0xaeaaaaaa),
1339 cpu_to_le32(0xaaaaaaaa),
1340 cpu_to_le32(0xcc00ff28),
1341 cpu_to_le32(0x0000aaaa),
1342 cpu_to_le32(0xcc00aaaa),
1343 cpu_to_le32(0x0000aaaa),
1344 cpu_to_le32(0xc0004000),
1345 cpu_to_le32(0x00004000),
1346 cpu_to_le32(0xf0005000),
1347 cpu_to_le32(0xf0005000),
1348 };
1349
1350 static const __le32 iwlagn_concurrent_lookup[12] = {
1351 cpu_to_le32(0xaaaaaaaa),
1352 cpu_to_le32(0xaaaaaaaa),
1353 cpu_to_le32(0xaaaaaaaa),
1354 cpu_to_le32(0xaaaaaaaa),
1355 cpu_to_le32(0xaaaaaaaa),
1356 cpu_to_le32(0xaaaaaaaa),
1357 cpu_to_le32(0xaaaaaaaa),
1358 cpu_to_le32(0xaaaaaaaa),
1359 cpu_to_le32(0x00000000),
1360 cpu_to_le32(0x00000000),
1361 cpu_to_le32(0x00000000),
1362 cpu_to_le32(0x00000000),
1363 };
1364
1365 void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
1366 {
1367 struct iwl_basic_bt_cmd basic = {
1368 .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
1369 .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
1370 .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
1371 .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
1372 };
1373 struct iwl6000_bt_cmd bt_cmd_6000;
1374 struct iwl2000_bt_cmd bt_cmd_2000;
1375 int ret;
1376
1377 BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
1378 sizeof(basic.bt3_lookup_table));
1379
1380 if (priv->cfg->bt_params) {
1381 if (priv->cfg->bt_params->bt_session_2) {
1382 bt_cmd_2000.prio_boost = cpu_to_le32(
1383 priv->cfg->bt_params->bt_prio_boost);
1384 bt_cmd_2000.tx_prio_boost = 0;
1385 bt_cmd_2000.rx_prio_boost = 0;
1386 } else {
1387 bt_cmd_6000.prio_boost =
1388 priv->cfg->bt_params->bt_prio_boost;
1389 bt_cmd_6000.tx_prio_boost = 0;
1390 bt_cmd_6000.rx_prio_boost = 0;
1391 }
1392 } else {
1393 IWL_ERR(priv, "failed to construct BT Coex Config\n");
1394 return;
1395 }
1396
1397 basic.kill_ack_mask = priv->kill_ack_mask;
1398 basic.kill_cts_mask = priv->kill_cts_mask;
1399 basic.valid = priv->bt_valid;
1400
1401 /*
1402 * Configure BT coex mode to "no coexistence" when the
1403 * user disabled BT coexistence, we have no interface
1404 * (might be in monitor mode), or the interface is in
1405 * IBSS mode (no proper uCode support for coex then).
1406 */
1407 if (!iwlagn_mod_params.bt_coex_active ||
1408 priv->iw_mode == NL80211_IFTYPE_ADHOC) {
1409 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
1410 } else {
1411 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
1412 IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
1413
1414 if (!priv->bt_enable_pspoll)
1415 basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
1416 else
1417 basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
1418
1419 if (priv->bt_ch_announce)
1420 basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
1421 IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
1422 }
1423 priv->bt_enable_flag = basic.flags;
1424 if (priv->bt_full_concurrent)
1425 memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
1426 sizeof(iwlagn_concurrent_lookup));
1427 else
1428 memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
1429 sizeof(iwlagn_def_3w_lookup));
1430
1431 IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
1432 basic.flags ? "active" : "disabled",
1433 priv->bt_full_concurrent ?
1434 "full concurrency" : "3-wire");
1435
1436 if (priv->cfg->bt_params->bt_session_2) {
1437 memcpy(&bt_cmd_2000.basic, &basic,
1438 sizeof(basic));
1439 ret = trans_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1440 CMD_SYNC, sizeof(bt_cmd_2000), &bt_cmd_2000);
1441 } else {
1442 memcpy(&bt_cmd_6000.basic, &basic,
1443 sizeof(basic));
1444 ret = trans_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1445 CMD_SYNC, sizeof(bt_cmd_6000), &bt_cmd_6000);
1446 }
1447 if (ret)
1448 IWL_ERR(priv, "failed to send BT Coex Config\n");
1449
1450 }
1451
1452 void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
1453 {
1454 struct iwl_rxon_context *ctx, *found_ctx = NULL;
1455 bool found_ap = false;
1456
1457 lockdep_assert_held(&priv->mutex);
1458
1459 /* Check whether AP or GO mode is active. */
1460 if (rssi_ena) {
1461 for_each_context(priv, ctx) {
1462 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
1463 iwl_is_associated_ctx(ctx)) {
1464 found_ap = true;
1465 break;
1466 }
1467 }
1468 }
1469
1470 /*
1471 * If disable was received or If GO/AP mode, disable RSSI
1472 * measurements.
1473 */
1474 if (!rssi_ena || found_ap) {
1475 if (priv->cur_rssi_ctx) {
1476 ctx = priv->cur_rssi_ctx;
1477 ieee80211_disable_rssi_reports(ctx->vif);
1478 priv->cur_rssi_ctx = NULL;
1479 }
1480 return;
1481 }
1482
1483 /*
1484 * If rssi measurements need to be enabled, consider all cases now.
1485 * Figure out how many contexts are active.
1486 */
1487 for_each_context(priv, ctx) {
1488 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
1489 iwl_is_associated_ctx(ctx)) {
1490 found_ctx = ctx;
1491 break;
1492 }
1493 }
1494
1495 /*
1496 * rssi monitor already enabled for the correct interface...nothing
1497 * to do.
1498 */
1499 if (found_ctx == priv->cur_rssi_ctx)
1500 return;
1501
1502 /*
1503 * Figure out if rssi monitor is currently enabled, and needs
1504 * to be changed. If rssi monitor is already enabled, disable
1505 * it first else just enable rssi measurements on the
1506 * interface found above.
1507 */
1508 if (priv->cur_rssi_ctx) {
1509 ctx = priv->cur_rssi_ctx;
1510 if (ctx->vif)
1511 ieee80211_disable_rssi_reports(ctx->vif);
1512 }
1513
1514 priv->cur_rssi_ctx = found_ctx;
1515
1516 if (!found_ctx)
1517 return;
1518
1519 ieee80211_enable_rssi_reports(found_ctx->vif,
1520 IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
1521 IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
1522 }
1523
1524 static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
1525 {
1526 return BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3 >>
1527 BT_UART_MSG_FRAME3SCOESCO_POS;
1528 }
1529
1530 static void iwlagn_bt_traffic_change_work(struct work_struct *work)
1531 {
1532 struct iwl_priv *priv =
1533 container_of(work, struct iwl_priv, bt_traffic_change_work);
1534 struct iwl_rxon_context *ctx;
1535 int smps_request = -1;
1536
1537 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
1538 /* bt coex disabled */
1539 return;
1540 }
1541
1542 /*
1543 * Note: bt_traffic_load can be overridden by scan complete and
1544 * coex profile notifications. Ignore that since only bad consequence
1545 * can be not matching debug print with actual state.
1546 */
1547 IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
1548 priv->bt_traffic_load);
1549
1550 switch (priv->bt_traffic_load) {
1551 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
1552 if (priv->bt_status)
1553 smps_request = IEEE80211_SMPS_DYNAMIC;
1554 else
1555 smps_request = IEEE80211_SMPS_AUTOMATIC;
1556 break;
1557 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
1558 smps_request = IEEE80211_SMPS_DYNAMIC;
1559 break;
1560 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
1561 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
1562 smps_request = IEEE80211_SMPS_STATIC;
1563 break;
1564 default:
1565 IWL_ERR(priv, "Invalid BT traffic load: %d\n",
1566 priv->bt_traffic_load);
1567 break;
1568 }
1569
1570 mutex_lock(&priv->mutex);
1571
1572 /*
1573 * We can not send command to firmware while scanning. When the scan
1574 * complete we will schedule this work again. We do check with mutex
1575 * locked to prevent new scan request to arrive. We do not check
1576 * STATUS_SCANNING to avoid race when queue_work two times from
1577 * different notifications, but quit and not perform any work at all.
1578 */
1579 if (test_bit(STATUS_SCAN_HW, &priv->status))
1580 goto out;
1581
1582 iwl_update_chain_flags(priv);
1583
1584 if (smps_request != -1) {
1585 priv->current_ht_config.smps = smps_request;
1586 for_each_context(priv, ctx) {
1587 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
1588 ieee80211_request_smps(ctx->vif, smps_request);
1589 }
1590 }
1591
1592 /*
1593 * Dynamic PS poll related functionality. Adjust RSSI measurements if
1594 * necessary.
1595 */
1596 iwlagn_bt_coex_rssi_monitor(priv);
1597 out:
1598 mutex_unlock(&priv->mutex);
1599 }
1600
1601 /*
1602 * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
1603 * correct interface or disable it if this is the last interface to be
1604 * removed.
1605 */
1606 void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
1607 {
1608 if (priv->bt_is_sco &&
1609 priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
1610 iwlagn_bt_adjust_rssi_monitor(priv, true);
1611 else
1612 iwlagn_bt_adjust_rssi_monitor(priv, false);
1613 }
1614
1615 static void iwlagn_print_uartmsg(struct iwl_priv *priv,
1616 struct iwl_bt_uart_msg *uart_msg)
1617 {
1618 IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
1619 "Update Req = 0x%X",
1620 (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
1621 BT_UART_MSG_FRAME1MSGTYPE_POS,
1622 (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
1623 BT_UART_MSG_FRAME1SSN_POS,
1624 (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
1625 BT_UART_MSG_FRAME1UPDATEREQ_POS);
1626
1627 IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
1628 "Chl_SeqN = 0x%X, In band = 0x%X",
1629 (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
1630 BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
1631 (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
1632 BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
1633 (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
1634 BT_UART_MSG_FRAME2CHLSEQN_POS,
1635 (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
1636 BT_UART_MSG_FRAME2INBAND_POS);
1637
1638 IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
1639 "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X",
1640 (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
1641 BT_UART_MSG_FRAME3SCOESCO_POS,
1642 (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
1643 BT_UART_MSG_FRAME3SNIFF_POS,
1644 (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
1645 BT_UART_MSG_FRAME3A2DP_POS,
1646 (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
1647 BT_UART_MSG_FRAME3ACL_POS,
1648 (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
1649 BT_UART_MSG_FRAME3MASTER_POS,
1650 (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
1651 BT_UART_MSG_FRAME3OBEX_POS);
1652
1653 IWL_DEBUG_COEX(priv, "Idle duration = 0x%X",
1654 (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
1655 BT_UART_MSG_FRAME4IDLEDURATION_POS);
1656
1657 IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
1658 "eSCO Retransmissions = 0x%X",
1659 (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
1660 BT_UART_MSG_FRAME5TXACTIVITY_POS,
1661 (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
1662 BT_UART_MSG_FRAME5RXACTIVITY_POS,
1663 (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
1664 BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
1665
1666 IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X",
1667 (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
1668 BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
1669 (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
1670 BT_UART_MSG_FRAME6DISCOVERABLE_POS);
1671
1672 IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
1673 "0x%X, Inquiry = 0x%X, Connectable = 0x%X",
1674 (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
1675 BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
1676 (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
1677 BT_UART_MSG_FRAME7PAGE_POS,
1678 (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
1679 BT_UART_MSG_FRAME7INQUIRY_POS,
1680 (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
1681 BT_UART_MSG_FRAME7CONNECTABLE_POS);
1682 }
1683
1684 static void iwlagn_set_kill_msk(struct iwl_priv *priv,
1685 struct iwl_bt_uart_msg *uart_msg)
1686 {
1687 u8 kill_msk;
1688 static const __le32 bt_kill_ack_msg[2] = {
1689 IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
1690 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1691 static const __le32 bt_kill_cts_msg[2] = {
1692 IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
1693 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
1694
1695 kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
1696 ? 1 : 0;
1697 if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
1698 priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
1699 priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
1700 priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
1701 priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
1702 priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
1703
1704 /* schedule to send runtime bt_config */
1705 queue_work(priv->workqueue, &priv->bt_runtime_config);
1706 }
1707 }
1708
1709 void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
1710 struct iwl_rx_mem_buffer *rxb)
1711 {
1712 unsigned long flags;
1713 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1714 struct iwl_bt_coex_profile_notif *coex = &pkt->u.bt_coex_profile_notif;
1715 struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
1716
1717 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
1718 /* bt coex disabled */
1719 return;
1720 }
1721
1722 IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
1723 IWL_DEBUG_COEX(priv, " status: %d\n", coex->bt_status);
1724 IWL_DEBUG_COEX(priv, " traffic load: %d\n", coex->bt_traffic_load);
1725 IWL_DEBUG_COEX(priv, " CI compliance: %d\n",
1726 coex->bt_ci_compliance);
1727 iwlagn_print_uartmsg(priv, uart_msg);
1728
1729 priv->last_bt_traffic_load = priv->bt_traffic_load;
1730 priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);
1731
1732 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
1733 if (priv->bt_status != coex->bt_status ||
1734 priv->last_bt_traffic_load != coex->bt_traffic_load) {
1735 if (coex->bt_status) {
1736 /* BT on */
1737 if (!priv->bt_ch_announce)
1738 priv->bt_traffic_load =
1739 IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1740 else
1741 priv->bt_traffic_load =
1742 coex->bt_traffic_load;
1743 } else {
1744 /* BT off */
1745 priv->bt_traffic_load =
1746 IWL_BT_COEX_TRAFFIC_LOAD_NONE;
1747 }
1748 priv->bt_status = coex->bt_status;
1749 queue_work(priv->workqueue,
1750 &priv->bt_traffic_change_work);
1751 }
1752 }
1753
1754 iwlagn_set_kill_msk(priv, uart_msg);
1755
1756 /* FIXME: based on notification, adjust the prio_boost */
1757
1758 spin_lock_irqsave(&priv->lock, flags);
1759 priv->bt_ci_compliance = coex->bt_ci_compliance;
1760 spin_unlock_irqrestore(&priv->lock, flags);
1761 }
1762
1763 void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
1764 {
1765 iwlagn_rx_handler_setup(priv);
1766 priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
1767 iwlagn_bt_coex_profile_notif;
1768 }
1769
1770 void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
1771 {
1772 iwlagn_setup_deferred_work(priv);
1773
1774 INIT_WORK(&priv->bt_traffic_change_work,
1775 iwlagn_bt_traffic_change_work);
1776 }
1777
1778 void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
1779 {
1780 cancel_work_sync(&priv->bt_traffic_change_work);
1781 }
1782
1783 static bool is_single_rx_stream(struct iwl_priv *priv)
1784 {
1785 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
1786 priv->current_ht_config.single_chain_sufficient;
1787 }
1788
1789 #define IWL_NUM_RX_CHAINS_MULTIPLE 3
1790 #define IWL_NUM_RX_CHAINS_SINGLE 2
1791 #define IWL_NUM_IDLE_CHAINS_DUAL 2
1792 #define IWL_NUM_IDLE_CHAINS_SINGLE 1
1793
1794 /*
1795 * Determine how many receiver/antenna chains to use.
1796 *
1797 * More provides better reception via diversity. Fewer saves power
1798 * at the expense of throughput, but only when not in powersave to
1799 * start with.
1800 *
1801 * MIMO (dual stream) requires at least 2, but works better with 3.
1802 * This does not determine *which* chains to use, just how many.
1803 */
1804 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
1805 {
1806 if (priv->cfg->bt_params &&
1807 priv->cfg->bt_params->advanced_bt_coexist &&
1808 (priv->bt_full_concurrent ||
1809 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
1810 /*
1811 * only use chain 'A' in bt high traffic load or
1812 * full concurrency mode
1813 */
1814 return IWL_NUM_RX_CHAINS_SINGLE;
1815 }
1816 /* # of Rx chains to use when expecting MIMO. */
1817 if (is_single_rx_stream(priv))
1818 return IWL_NUM_RX_CHAINS_SINGLE;
1819 else
1820 return IWL_NUM_RX_CHAINS_MULTIPLE;
1821 }
1822
1823 /*
1824 * When we are in power saving mode, unless device support spatial
1825 * multiplexing power save, use the active count for rx chain count.
1826 */
1827 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
1828 {
1829 /* # Rx chains when idling, depending on SMPS mode */
1830 switch (priv->current_ht_config.smps) {
1831 case IEEE80211_SMPS_STATIC:
1832 case IEEE80211_SMPS_DYNAMIC:
1833 return IWL_NUM_IDLE_CHAINS_SINGLE;
1834 case IEEE80211_SMPS_OFF:
1835 return active_cnt;
1836 default:
1837 WARN(1, "invalid SMPS mode %d",
1838 priv->current_ht_config.smps);
1839 return active_cnt;
1840 }
1841 }
1842
1843 /* up to 4 chains */
1844 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1845 {
1846 u8 res;
1847 res = (chain_bitmap & BIT(0)) >> 0;
1848 res += (chain_bitmap & BIT(1)) >> 1;
1849 res += (chain_bitmap & BIT(2)) >> 2;
1850 res += (chain_bitmap & BIT(3)) >> 3;
1851 return res;
1852 }
1853
1854 /**
1855 * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1856 *
1857 * Selects how many and which Rx receivers/antennas/chains to use.
1858 * This should not be used for scan command ... it puts data in wrong place.
1859 */
1860 void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1861 {
1862 bool is_single = is_single_rx_stream(priv);
1863 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1864 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1865 u32 active_chains;
1866 u16 rx_chain;
1867
1868 /* Tell uCode which antennas are actually connected.
1869 * Before first association, we assume all antennas are connected.
1870 * Just after first association, iwl_chain_noise_calibration()
1871 * checks which antennas actually *are* connected. */
1872 if (priv->chain_noise_data.active_chains)
1873 active_chains = priv->chain_noise_data.active_chains;
1874 else
1875 active_chains = priv->hw_params.valid_rx_ant;
1876
1877 if (priv->cfg->bt_params &&
1878 priv->cfg->bt_params->advanced_bt_coexist &&
1879 (priv->bt_full_concurrent ||
1880 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
1881 /*
1882 * only use chain 'A' in bt high traffic load or
1883 * full concurrency mode
1884 */
1885 active_chains = first_antenna(active_chains);
1886 }
1887
1888 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1889
1890 /* How many receivers should we use? */
1891 active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1892 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1893
1894
1895 /* correct rx chain count according hw settings
1896 * and chain noise calibration
1897 */
1898 valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1899 if (valid_rx_cnt < active_rx_cnt)
1900 active_rx_cnt = valid_rx_cnt;
1901
1902 if (valid_rx_cnt < idle_rx_cnt)
1903 idle_rx_cnt = valid_rx_cnt;
1904
1905 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1906 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
1907
1908 ctx->staging.rx_chain = cpu_to_le16(rx_chain);
1909
1910 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1911 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1912 else
1913 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1914
1915 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1916 ctx->staging.rx_chain,
1917 active_rx_cnt, idle_rx_cnt);
1918
1919 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1920 active_rx_cnt < idle_rx_cnt);
1921 }
1922
1923 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
1924 {
1925 int i;
1926 u8 ind = ant;
1927
1928 if (priv->band == IEEE80211_BAND_2GHZ &&
1929 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
1930 return 0;
1931
1932 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
1933 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
1934 if (valid & BIT(ind))
1935 return ind;
1936 }
1937 return ant;
1938 }
1939
1940 static const char *get_csr_string(int cmd)
1941 {
1942 switch (cmd) {
1943 IWL_CMD(CSR_HW_IF_CONFIG_REG);
1944 IWL_CMD(CSR_INT_COALESCING);
1945 IWL_CMD(CSR_INT);
1946 IWL_CMD(CSR_INT_MASK);
1947 IWL_CMD(CSR_FH_INT_STATUS);
1948 IWL_CMD(CSR_GPIO_IN);
1949 IWL_CMD(CSR_RESET);
1950 IWL_CMD(CSR_GP_CNTRL);
1951 IWL_CMD(CSR_HW_REV);
1952 IWL_CMD(CSR_EEPROM_REG);
1953 IWL_CMD(CSR_EEPROM_GP);
1954 IWL_CMD(CSR_OTP_GP_REG);
1955 IWL_CMD(CSR_GIO_REG);
1956 IWL_CMD(CSR_GP_UCODE_REG);
1957 IWL_CMD(CSR_GP_DRIVER_REG);
1958 IWL_CMD(CSR_UCODE_DRV_GP1);
1959 IWL_CMD(CSR_UCODE_DRV_GP2);
1960 IWL_CMD(CSR_LED_REG);
1961 IWL_CMD(CSR_DRAM_INT_TBL_REG);
1962 IWL_CMD(CSR_GIO_CHICKEN_BITS);
1963 IWL_CMD(CSR_ANA_PLL_CFG);
1964 IWL_CMD(CSR_HW_REV_WA_REG);
1965 IWL_CMD(CSR_DBG_HPET_MEM_REG);
1966 default:
1967 return "UNKNOWN";
1968 }
1969 }
1970
1971 void iwl_dump_csr(struct iwl_priv *priv)
1972 {
1973 int i;
1974 static const u32 csr_tbl[] = {
1975 CSR_HW_IF_CONFIG_REG,
1976 CSR_INT_COALESCING,
1977 CSR_INT,
1978 CSR_INT_MASK,
1979 CSR_FH_INT_STATUS,
1980 CSR_GPIO_IN,
1981 CSR_RESET,
1982 CSR_GP_CNTRL,
1983 CSR_HW_REV,
1984 CSR_EEPROM_REG,
1985 CSR_EEPROM_GP,
1986 CSR_OTP_GP_REG,
1987 CSR_GIO_REG,
1988 CSR_GP_UCODE_REG,
1989 CSR_GP_DRIVER_REG,
1990 CSR_UCODE_DRV_GP1,
1991 CSR_UCODE_DRV_GP2,
1992 CSR_LED_REG,
1993 CSR_DRAM_INT_TBL_REG,
1994 CSR_GIO_CHICKEN_BITS,
1995 CSR_ANA_PLL_CFG,
1996 CSR_HW_REV_WA_REG,
1997 CSR_DBG_HPET_MEM_REG
1998 };
1999 IWL_ERR(priv, "CSR values:\n");
2000 IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2001 "CSR_INT_PERIODIC_REG)\n");
2002 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2003 IWL_ERR(priv, " %25s: 0X%08x\n",
2004 get_csr_string(csr_tbl[i]),
2005 iwl_read32(priv, csr_tbl[i]));
2006 }
2007 }
2008
2009 static const char *get_fh_string(int cmd)
2010 {
2011 switch (cmd) {
2012 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2013 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2014 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2015 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2016 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2017 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2018 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2019 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2020 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2021 default:
2022 return "UNKNOWN";
2023 }
2024 }
2025
2026 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2027 {
2028 int i;
2029 #ifdef CONFIG_IWLWIFI_DEBUG
2030 int pos = 0;
2031 size_t bufsz = 0;
2032 #endif
2033 static const u32 fh_tbl[] = {
2034 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2035 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2036 FH_RSCSR_CHNL0_WPTR,
2037 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2038 FH_MEM_RSSR_SHARED_CTRL_REG,
2039 FH_MEM_RSSR_RX_STATUS_REG,
2040 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2041 FH_TSSR_TX_STATUS_REG,
2042 FH_TSSR_TX_ERROR_REG
2043 };
2044 #ifdef CONFIG_IWLWIFI_DEBUG
2045 if (display) {
2046 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2047 *buf = kmalloc(bufsz, GFP_KERNEL);
2048 if (!*buf)
2049 return -ENOMEM;
2050 pos += scnprintf(*buf + pos, bufsz - pos,
2051 "FH register values:\n");
2052 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2053 pos += scnprintf(*buf + pos, bufsz - pos,
2054 " %34s: 0X%08x\n",
2055 get_fh_string(fh_tbl[i]),
2056 iwl_read_direct32(priv, fh_tbl[i]));
2057 }
2058 return pos;
2059 }
2060 #endif
2061 IWL_ERR(priv, "FH register values:\n");
2062 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2063 IWL_ERR(priv, " %34s: 0X%08x\n",
2064 get_fh_string(fh_tbl[i]),
2065 iwl_read_direct32(priv, fh_tbl[i]));
2066 }
2067 return 0;
2068 }
2069
2070 /* notification wait support */
2071 void iwlagn_init_notification_wait(struct iwl_priv *priv,
2072 struct iwl_notification_wait *wait_entry,
2073 u8 cmd,
2074 void (*fn)(struct iwl_priv *priv,
2075 struct iwl_rx_packet *pkt,
2076 void *data),
2077 void *fn_data)
2078 {
2079 wait_entry->fn = fn;
2080 wait_entry->fn_data = fn_data;
2081 wait_entry->cmd = cmd;
2082 wait_entry->triggered = false;
2083 wait_entry->aborted = false;
2084
2085 spin_lock_bh(&priv->_agn.notif_wait_lock);
2086 list_add(&wait_entry->list, &priv->_agn.notif_waits);
2087 spin_unlock_bh(&priv->_agn.notif_wait_lock);
2088 }
2089
2090 int iwlagn_wait_notification(struct iwl_priv *priv,
2091 struct iwl_notification_wait *wait_entry,
2092 unsigned long timeout)
2093 {
2094 int ret;
2095
2096 ret = wait_event_timeout(priv->_agn.notif_waitq,
2097 wait_entry->triggered || wait_entry->aborted,
2098 timeout);
2099
2100 spin_lock_bh(&priv->_agn.notif_wait_lock);
2101 list_del(&wait_entry->list);
2102 spin_unlock_bh(&priv->_agn.notif_wait_lock);
2103
2104 if (wait_entry->aborted)
2105 return -EIO;
2106
2107 /* return value is always >= 0 */
2108 if (ret <= 0)
2109 return -ETIMEDOUT;
2110 return 0;
2111 }
2112
2113 void iwlagn_remove_notification(struct iwl_priv *priv,
2114 struct iwl_notification_wait *wait_entry)
2115 {
2116 spin_lock_bh(&priv->_agn.notif_wait_lock);
2117 list_del(&wait_entry->list);
2118 spin_unlock_bh(&priv->_agn.notif_wait_lock);
2119 }
2120
2121 int iwlagn_start_device(struct iwl_priv *priv)
2122 {
2123 int ret;
2124
2125 priv->ucode_owner = IWL_OWNERSHIP_DRIVER;
2126
2127 if ((priv->cfg->sku & EEPROM_SKU_CAP_AMT_ENABLE) &&
2128 iwl_prepare_card_hw(priv)) {
2129 IWL_WARN(priv, "Exit HW not ready\n");
2130 return -EIO;
2131 }
2132
2133 /* If platform's RF_KILL switch is NOT set to KILL */
2134 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2135 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2136 else
2137 set_bit(STATUS_RF_KILL_HW, &priv->status);
2138
2139 if (iwl_is_rfkill(priv)) {
2140 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2141 iwl_enable_interrupts(priv);
2142 return -ERFKILL;
2143 }
2144
2145 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2146
2147 ret = iwlagn_hw_nic_init(priv);
2148 if (ret) {
2149 IWL_ERR(priv, "Unable to init nic\n");
2150 return ret;
2151 }
2152
2153 /* make sure rfkill handshake bits are cleared */
2154 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2155 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2156 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2157
2158 /* clear (again), then enable host interrupts */
2159 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2160 iwl_enable_interrupts(priv);
2161
2162 /* really make sure rfkill handshake bits are cleared */
2163 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2164 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2165
2166 return 0;
2167 }
2168
2169 void iwlagn_stop_device(struct iwl_priv *priv)
2170 {
2171 unsigned long flags;
2172
2173 /* stop and reset the on-board processor */
2174 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2175
2176 /* tell the device to stop sending interrupts */
2177 spin_lock_irqsave(&priv->lock, flags);
2178 iwl_disable_interrupts(priv);
2179 spin_unlock_irqrestore(&priv->lock, flags);
2180 trans_sync_irq(priv);
2181
2182 /* device going down, Stop using ICT table */
2183 iwl_disable_ict(priv);
2184
2185 /*
2186 * If a HW restart happens during firmware loading,
2187 * then the firmware loading might call this function
2188 * and later it might be called again due to the
2189 * restart. So don't process again if the device is
2190 * already dead.
2191 */
2192 if (test_bit(STATUS_DEVICE_ENABLED, &priv->status)) {
2193 trans_tx_stop(priv);
2194 trans_rx_stop(priv);
2195
2196 /* Power-down device's busmaster DMA clocks */
2197 iwl_write_prph(priv, APMG_CLK_DIS_REG,
2198 APMG_CLK_VAL_DMA_CLK_RQT);
2199 udelay(5);
2200 }
2201
2202 /* Make sure (redundant) we've released our request to stay awake */
2203 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2204
2205 /* Stop the device, and put it in low power state */
2206 iwl_apm_stop(priv);
2207 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree