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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / net / wireless / ath / ath9k / gpio.c
blobb1956bf6e01e12480fad2b0d8e580abca118399c
1 /*
2 * Copyright (c) 2008-2011 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include "ath9k.h"
18
19 /********************************/
20 /* LED functions */
21 /********************************/
22
23 #ifdef CONFIG_MAC80211_LEDS
24 static void ath_led_brightness(struct led_classdev *led_cdev,
25 enum led_brightness brightness)
26 {
27 struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);
28 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF));
29 }
30
31 void ath_deinit_leds(struct ath_softc *sc)
32 {
33 if (!sc->led_registered)
34 return;
35
36 ath_led_brightness(&sc->led_cdev, LED_OFF);
37 led_classdev_unregister(&sc->led_cdev);
38 }
39
40 void ath_init_leds(struct ath_softc *sc)
41 {
42 int ret;
43
44 if (AR_SREV_9100(sc->sc_ah))
45 return;
46
47 if (!led_blink)
48 sc->led_cdev.default_trigger =
49 ieee80211_get_radio_led_name(sc->hw);
50
51 snprintf(sc->led_name, sizeof(sc->led_name),
52 "ath9k-%s", wiphy_name(sc->hw->wiphy));
53 sc->led_cdev.name = sc->led_name;
54 sc->led_cdev.brightness_set = ath_led_brightness;
55
56 ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
57 if (ret < 0)
58 return;
59
60 sc->led_registered = true;
61 }
62
63 void ath_fill_led_pin(struct ath_softc *sc)
64 {
65 struct ath_hw *ah = sc->sc_ah;
66
67 if (AR_SREV_9100(ah) || (ah->led_pin >= 0))
68 return;
69
70 if (AR_SREV_9287(ah))
71 ah->led_pin = ATH_LED_PIN_9287;
72 else if (AR_SREV_9485(sc->sc_ah))
73 ah->led_pin = ATH_LED_PIN_9485;
74 else if (AR_SREV_9300(sc->sc_ah))
75 ah->led_pin = ATH_LED_PIN_9300;
76 else if (AR_SREV_9462(sc->sc_ah) || AR_SREV_9565(sc->sc_ah))
77 ah->led_pin = ATH_LED_PIN_9462;
78 else
79 ah->led_pin = ATH_LED_PIN_DEF;
80
81 /* Configure gpio 1 for output */
82 ath9k_hw_cfg_output(ah, ah->led_pin, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
83
84 /* LED off, active low */
85 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
86 }
87 #endif
88
89 /*******************/
90 /* Rfkill */
91 /*******************/
92
93 static bool ath_is_rfkill_set(struct ath_softc *sc)
94 {
95 struct ath_hw *ah = sc->sc_ah;
96 bool is_blocked;
97
98 ath9k_ps_wakeup(sc);
99 is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
100 ah->rfkill_polarity;
101 ath9k_ps_restore(sc);
102
103 return is_blocked;
104 }
105
106 void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
107 {
108 struct ath_softc *sc = hw->priv;
109 bool blocked = !!ath_is_rfkill_set(sc);
110
111 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
112 }
113
114 void ath_start_rfkill_poll(struct ath_softc *sc)
115 {
116 struct ath_hw *ah = sc->sc_ah;
117
118 if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
119 wiphy_rfkill_start_polling(sc->hw->wiphy);
120 }
121
122 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
123
124 /******************/
125 /* BTCOEX */
126 /******************/
127
128 /*
129 * Detects if there is any priority bt traffic
130 */
131 static void ath_detect_bt_priority(struct ath_softc *sc)
132 {
133 struct ath_btcoex *btcoex = &sc->btcoex;
134 struct ath_hw *ah = sc->sc_ah;
135
136 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))
137 btcoex->bt_priority_cnt++;
138
139 if (time_after(jiffies, btcoex->bt_priority_time +
140 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
141 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
142 clear_bit(BT_OP_SCAN, &btcoex->op_flags);
143 /* Detect if colocated bt started scanning */
144 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
145 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
146 "BT scan detected\n");
147 set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
148 set_bit(BT_OP_SCAN, &btcoex->op_flags);
149 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
150 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
151 "BT priority traffic detected\n");
152 set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
153 }
154
155 btcoex->bt_priority_cnt = 0;
156 btcoex->bt_priority_time = jiffies;
157 }
158 }
159
160 static void ath_mci_ftp_adjust(struct ath_softc *sc)
161 {
162 struct ath_btcoex *btcoex = &sc->btcoex;
163 struct ath_mci_profile *mci = &btcoex->mci;
164 struct ath_hw *ah = sc->sc_ah;
165
166 if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) {
167 if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) &&
168 (mci->num_pan || mci->num_other_acl))
169 ah->btcoex_hw.mci.stomp_ftp =
170 (sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH);
171 else
172 ah->btcoex_hw.mci.stomp_ftp = false;
173 btcoex->bt_wait_time = 0;
174 sc->rx.num_pkts = 0;
175 }
176 }
177
178 /*
179 * This is the master bt coex timer which runs for every
180 * 45ms, bt traffic will be given priority during 55% of this
181 * period while wlan gets remaining 45%
182 */
183 static void ath_btcoex_period_timer(unsigned long data)
184 {
185 struct ath_softc *sc = (struct ath_softc *) data;
186 struct ath_hw *ah = sc->sc_ah;
187 struct ath_btcoex *btcoex = &sc->btcoex;
188 enum ath_stomp_type stomp_type;
189 u32 timer_period;
190 unsigned long flags;
191
192 spin_lock_irqsave(&sc->sc_pm_lock, flags);
193 if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) {
194 btcoex->bt_wait_time += btcoex->btcoex_period;
195 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
196 goto skip_hw_wakeup;
197 }
198 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
199
200 ath9k_mci_update_rssi(sc);
201
202 ath9k_ps_wakeup(sc);
203
204 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
205 ath_detect_bt_priority(sc);
206
207 if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
208 ath_mci_ftp_adjust(sc);
209
210 spin_lock_bh(&btcoex->btcoex_lock);
211
212 stomp_type = btcoex->bt_stomp_type;
213 timer_period = btcoex->btcoex_no_stomp;
214
215 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) {
216 if (test_bit(BT_OP_SCAN, &btcoex->op_flags)) {
217 stomp_type = ATH_BTCOEX_STOMP_ALL;
218 timer_period = btcoex->btscan_no_stomp;
219 }
220 } else if (btcoex->stomp_audio >= 5) {
221 stomp_type = ATH_BTCOEX_STOMP_AUDIO;
222 btcoex->stomp_audio = 0;
223 }
224
225 ath9k_hw_btcoex_bt_stomp(ah, stomp_type);
226 ath9k_hw_btcoex_enable(ah);
227
228 spin_unlock_bh(&btcoex->btcoex_lock);
229
230 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp)
231 mod_timer(&btcoex->no_stomp_timer,
232 jiffies + msecs_to_jiffies(timer_period));
233
234 ath9k_ps_restore(sc);
235
236 skip_hw_wakeup:
237 mod_timer(&btcoex->period_timer,
238 jiffies + msecs_to_jiffies(btcoex->btcoex_period));
239 }
240
241 /*
242 * Generic tsf based hw timer which configures weight
243 * registers to time slice between wlan and bt traffic
244 */
245 static void ath_btcoex_no_stomp_timer(unsigned long arg)
246 {
247 struct ath_softc *sc = (struct ath_softc *)arg;
248 struct ath_hw *ah = sc->sc_ah;
249 struct ath_btcoex *btcoex = &sc->btcoex;
250 struct ath_common *common = ath9k_hw_common(ah);
251
252 ath_dbg(common, BTCOEX, "no stomp timer running\n");
253
254 ath9k_ps_wakeup(sc);
255 spin_lock_bh(&btcoex->btcoex_lock);
256
257 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||
258 (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI) &&
259 test_bit(BT_OP_SCAN, &btcoex->op_flags)))
260 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
261 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
262 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
263
264 ath9k_hw_btcoex_enable(ah);
265 spin_unlock_bh(&btcoex->btcoex_lock);
266 ath9k_ps_restore(sc);
267 }
268
269 static int ath_init_btcoex_timer(struct ath_softc *sc)
270 {
271 struct ath_btcoex *btcoex = &sc->btcoex;
272
273 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
274 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
275 btcoex->btcoex_period / 100;
276 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
277 btcoex->btcoex_period / 100;
278
279 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
280 (unsigned long) sc);
281 setup_timer(&btcoex->no_stomp_timer, ath_btcoex_no_stomp_timer,
282 (unsigned long) sc);
283
284 spin_lock_init(&btcoex->btcoex_lock);
285
286 return 0;
287 }
288
289 /*
290 * (Re)start btcoex timers
291 */
292 void ath9k_btcoex_timer_resume(struct ath_softc *sc)
293 {
294 struct ath_btcoex *btcoex = &sc->btcoex;
295 struct ath_hw *ah = sc->sc_ah;
296
297 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n");
298
299 /* make sure duty cycle timer is also stopped when resuming */
300 del_timer_sync(&btcoex->no_stomp_timer);
301
302 btcoex->bt_priority_cnt = 0;
303 btcoex->bt_priority_time = jiffies;
304 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
305 clear_bit(BT_OP_SCAN, &btcoex->op_flags);
306
307 mod_timer(&btcoex->period_timer, jiffies);
308 }
309
310
311 /*
312 * Pause btcoex timer and bt duty cycle timer
313 */
314 void ath9k_btcoex_timer_pause(struct ath_softc *sc)
315 {
316 struct ath_btcoex *btcoex = &sc->btcoex;
317
318 del_timer_sync(&btcoex->period_timer);
319 del_timer_sync(&btcoex->no_stomp_timer);
320 }
321
322 void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc)
323 {
324 struct ath_btcoex *btcoex = &sc->btcoex;
325
326 del_timer_sync(&btcoex->no_stomp_timer);
327 }
328
329 u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen)
330 {
331 struct ath_btcoex *btcoex = &sc->btcoex;
332 struct ath_mci_profile *mci = &sc->btcoex.mci;
333 u16 aggr_limit = 0;
334
335 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit)
336 aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4;
337 else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags))
338 aggr_limit = min((max_4ms_framelen * 3) / 8,
339 (u32)ATH_AMPDU_LIMIT_MAX);
340
341 return aggr_limit;
342 }
343
344 void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status)
345 {
346 if (status & ATH9K_INT_MCI)
347 ath_mci_intr(sc);
348 }
349
350 void ath9k_start_btcoex(struct ath_softc *sc)
351 {
352 struct ath_hw *ah = sc->sc_ah;
353
354 if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
355 !ah->btcoex_hw.enabled) {
356 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
357 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
358 AR_STOMP_LOW_WLAN_WGHT, 0);
359 else
360 ath9k_hw_btcoex_set_weight(ah, 0, 0,
361 ATH_BTCOEX_STOMP_NONE);
362 ath9k_hw_btcoex_enable(ah);
363
364 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
365 ath9k_btcoex_timer_resume(sc);
366 }
367 }
368
369 void ath9k_stop_btcoex(struct ath_softc *sc)
370 {
371 struct ath_hw *ah = sc->sc_ah;
372
373 if (ah->btcoex_hw.enabled &&
374 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
375 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
376 ath9k_btcoex_timer_pause(sc);
377 ath9k_hw_btcoex_disable(ah);
378 if (AR_SREV_9462(ah) || AR_SREV_9565(ah))
379 ath_mci_flush_profile(&sc->btcoex.mci);
380 }
381 }
382
383 void ath9k_deinit_btcoex(struct ath_softc *sc)
384 {
385 struct ath_hw *ah = sc->sc_ah;
386
387 if (ath9k_hw_mci_is_enabled(ah))
388 ath_mci_cleanup(sc);
389 }
390
391 int ath9k_init_btcoex(struct ath_softc *sc)
392 {
393 struct ath_txq *txq;
394 struct ath_hw *ah = sc->sc_ah;
395 int r;
396
397 ath9k_hw_btcoex_init_scheme(ah);
398
399 switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) {
400 case ATH_BTCOEX_CFG_NONE:
401 break;
402 case ATH_BTCOEX_CFG_2WIRE:
403 ath9k_hw_btcoex_init_2wire(sc->sc_ah);
404 break;
405 case ATH_BTCOEX_CFG_3WIRE:
406 ath9k_hw_btcoex_init_3wire(sc->sc_ah);
407 r = ath_init_btcoex_timer(sc);
408 if (r)
409 return -1;
410 txq = sc->tx.txq_map[IEEE80211_AC_BE];
411 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);
412 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
413 if (ath9k_hw_mci_is_enabled(ah)) {
414 sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
415 INIT_LIST_HEAD(&sc->btcoex.mci.info);
416
417 r = ath_mci_setup(sc);
418 if (r)
419 return r;
420
421 ath9k_hw_btcoex_init_mci(ah);
422 }
423
424 break;
425 default:
426 WARN_ON(1);
427 break;
428 }
429
430 return 0;
431 }
432
433 static int ath9k_dump_mci_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
434 {
435 struct ath_btcoex *btcoex = &sc->btcoex;
436 struct ath_mci_profile *mci = &btcoex->mci;
437 struct ath_hw *ah = sc->sc_ah;
438 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
439 u32 len = 0;
440 int i;
441
442 ATH_DUMP_BTCOEX("Total BT profiles", NUM_PROF(mci));
443 ATH_DUMP_BTCOEX("MGMT", mci->num_mgmt);
444 ATH_DUMP_BTCOEX("SCO", mci->num_sco);
445 ATH_DUMP_BTCOEX("A2DP", mci->num_a2dp);
446 ATH_DUMP_BTCOEX("HID", mci->num_hid);
447 ATH_DUMP_BTCOEX("PAN", mci->num_pan);
448 ATH_DUMP_BTCOEX("ACL", mci->num_other_acl);
449 ATH_DUMP_BTCOEX("BDR", mci->num_bdr);
450 ATH_DUMP_BTCOEX("Aggr. Limit", mci->aggr_limit);
451 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type);
452 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period);
453 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle);
454 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time);
455 ATH_DUMP_BTCOEX("Concurrent Tx", btcoex_hw->mci.concur_tx);
456 ATH_DUMP_BTCOEX("Concurrent RSSI cnt", btcoex->rssi_count);
457
458 len += scnprintf(buf + len, size - len, "BT Weights: ");
459 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
460 len += scnprintf(buf + len, size - len, "%08x ",
461 btcoex_hw->bt_weight[i]);
462 len += scnprintf(buf + len, size - len, "\n");
463 len += scnprintf(buf + len, size - len, "WLAN Weights: ");
464 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
465 len += scnprintf(buf + len, size - len, "%08x ",
466 btcoex_hw->wlan_weight[i]);
467 len += scnprintf(buf + len, size - len, "\n");
468 len += scnprintf(buf + len, size - len, "Tx Priorities: ");
469 for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
470 len += scnprintf(buf + len, size - len, "%08x ",
471 btcoex_hw->tx_prio[i]);
472
473 len += scnprintf(buf + len, size - len, "\n");
474
475 return len;
476 }
477
478 static int ath9k_dump_legacy_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
479 {
480
481 struct ath_btcoex *btcoex = &sc->btcoex;
482 u32 len = 0;
483
484 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type);
485 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period);
486 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle);
487 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time);
488
489 return len;
490 }
491
492 int ath9k_dump_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
493 {
494 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
495 return ath9k_dump_mci_btcoex(sc, buf, size);
496 else
497 return ath9k_dump_legacy_btcoex(sc, buf, size);
498 }
499
500 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */
Linux with added FPC-III support