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1/*2 * Copyright (c) 2008-2011 Atheros Communications Inc.3 *4 * Permission to use, copy, modify, and/or distribute this software for any5 * purpose with or without fee is hereby granted, provided that the above6 * copyright notice and this permission notice appear in all copies.7 *8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF14 * 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_LEDS24 25static void ath_fill_led_pin(struct ath_softc *sc)26{27 struct ath_hw *ah = sc->sc_ah;28 29 /* Set default led pin if invalid */30 if (ah->led_pin < 0) {31 if (AR_SREV_9287(ah))32 ah->led_pin = ATH_LED_PIN_9287;33 else if (AR_SREV_9485(ah))34 ah->led_pin = ATH_LED_PIN_9485;35 else if (AR_SREV_9300(ah))36 ah->led_pin = ATH_LED_PIN_9300;37 else if (AR_SREV_9462(ah) || AR_SREV_9565(ah))38 ah->led_pin = ATH_LED_PIN_9462;39 else40 ah->led_pin = ATH_LED_PIN_DEF;41 }42 43 /* Configure gpio for output */44 ath9k_hw_gpio_request_out(ah, ah->led_pin, "ath9k-led",45 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);46 47 /* LED off, active low */48 ath9k_hw_set_gpio(ah, ah->led_pin, ah->config.led_active_high ? 0 : 1);49}50 51static void ath_led_brightness(struct led_classdev *led_cdev,52 enum led_brightness brightness)53{54 struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);55 u32 val = (brightness == LED_OFF);56 57 if (sc->sc_ah->config.led_active_high)58 val = !val;59 60 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, val);61}62 63void ath_deinit_leds(struct ath_softc *sc)64{65 if (!sc->led_registered)66 return;67 68 ath_led_brightness(&sc->led_cdev, LED_OFF);69 led_classdev_unregister(&sc->led_cdev);70 71 ath9k_hw_gpio_free(sc->sc_ah, sc->sc_ah->led_pin);72}73 74void ath_init_leds(struct ath_softc *sc)75{76 int ret;77 78 if (AR_SREV_9100(sc->sc_ah))79 return;80 81 ath_fill_led_pin(sc);82 83 if (!ath9k_led_blink)84 sc->led_cdev.default_trigger =85 ieee80211_get_radio_led_name(sc->hw);86 87 snprintf(sc->led_name, sizeof(sc->led_name),88 "ath9k-%s", wiphy_name(sc->hw->wiphy));89 sc->led_cdev.name = sc->led_name;90 sc->led_cdev.brightness_set = ath_led_brightness;91 92 ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);93 if (ret < 0)94 return;95 96 sc->led_registered = true;97}98#endif99 100/*******************/101/* Rfkill */102/*******************/103 104static bool ath_is_rfkill_set(struct ath_softc *sc)105{106 struct ath_hw *ah = sc->sc_ah;107 bool is_blocked;108 109 ath9k_ps_wakeup(sc);110 is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==111 ah->rfkill_polarity;112 ath9k_ps_restore(sc);113 114 return is_blocked;115}116 117void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)118{119 struct ath_softc *sc = hw->priv;120 bool blocked = !!ath_is_rfkill_set(sc);121 122 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);123}124 125void ath_start_rfkill_poll(struct ath_softc *sc)126{127 struct ath_hw *ah = sc->sc_ah;128 129 if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)130 wiphy_rfkill_start_polling(sc->hw->wiphy);131}132 133#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT134 135/******************/136/* BTCOEX */137/******************/138 139/*140 * Detects if there is any priority bt traffic141 */142static void ath_detect_bt_priority(struct ath_softc *sc)143{144 struct ath_btcoex *btcoex = &sc->btcoex;145 struct ath_hw *ah = sc->sc_ah;146 147 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))148 btcoex->bt_priority_cnt++;149 150 if (time_after(jiffies, btcoex->bt_priority_time +151 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {152 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);153 clear_bit(BT_OP_SCAN, &btcoex->op_flags);154 /* Detect if colocated bt started scanning */155 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {156 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,157 "BT scan detected\n");158 set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);159 set_bit(BT_OP_SCAN, &btcoex->op_flags);160 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {161 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,162 "BT priority traffic detected\n");163 set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);164 }165 166 btcoex->bt_priority_cnt = 0;167 btcoex->bt_priority_time = jiffies;168 }169}170 171static void ath_mci_ftp_adjust(struct ath_softc *sc)172{173 struct ath_btcoex *btcoex = &sc->btcoex;174 struct ath_mci_profile *mci = &btcoex->mci;175 struct ath_hw *ah = sc->sc_ah;176 177 if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) {178 if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) &&179 (mci->num_pan || mci->num_other_acl))180 ah->btcoex_hw.mci.stomp_ftp =181 (sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH);182 else183 ah->btcoex_hw.mci.stomp_ftp = false;184 btcoex->bt_wait_time = 0;185 sc->rx.num_pkts = 0;186 }187}188 189/*190 * This is the master bt coex timer which runs for every191 * 45ms, bt traffic will be given priority during 55% of this192 * period while wlan gets remaining 45%193 */194static void ath_btcoex_period_timer(struct timer_list *t)195{196 struct ath_softc *sc = from_timer(sc, t, btcoex.period_timer);197 struct ath_hw *ah = sc->sc_ah;198 struct ath_btcoex *btcoex = &sc->btcoex;199 enum ath_stomp_type stomp_type;200 u32 timer_period;201 unsigned long flags;202 203 spin_lock_irqsave(&sc->sc_pm_lock, flags);204 if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) {205 btcoex->bt_wait_time += btcoex->btcoex_period;206 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);207 goto skip_hw_wakeup;208 }209 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);210 211 ath9k_ps_wakeup(sc);212 spin_lock_bh(&btcoex->btcoex_lock);213 214 if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) {215 ath9k_mci_update_rssi(sc);216 ath_mci_ftp_adjust(sc);217 }218 219 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))220 ath_detect_bt_priority(sc);221 222 stomp_type = btcoex->bt_stomp_type;223 timer_period = btcoex->btcoex_no_stomp;224 225 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) {226 if (test_bit(BT_OP_SCAN, &btcoex->op_flags)) {227 stomp_type = ATH_BTCOEX_STOMP_ALL;228 timer_period = btcoex->btscan_no_stomp;229 }230 } else if (btcoex->stomp_audio >= 5) {231 stomp_type = ATH_BTCOEX_STOMP_AUDIO;232 btcoex->stomp_audio = 0;233 }234 235 ath9k_hw_btcoex_bt_stomp(ah, stomp_type);236 ath9k_hw_btcoex_enable(ah);237 238 spin_unlock_bh(&btcoex->btcoex_lock);239 240 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp)241 mod_timer(&btcoex->no_stomp_timer,242 jiffies + msecs_to_jiffies(timer_period));243 244 ath9k_ps_restore(sc);245 246skip_hw_wakeup:247 mod_timer(&btcoex->period_timer,248 jiffies + msecs_to_jiffies(btcoex->btcoex_period));249}250 251/*252 * Generic tsf based hw timer which configures weight253 * registers to time slice between wlan and bt traffic254 */255static void ath_btcoex_no_stomp_timer(struct timer_list *t)256{257 struct ath_softc *sc = from_timer(sc, t, btcoex.no_stomp_timer);258 struct ath_hw *ah = sc->sc_ah;259 struct ath_btcoex *btcoex = &sc->btcoex;260 261 ath9k_ps_wakeup(sc);262 spin_lock_bh(&btcoex->btcoex_lock);263 264 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||265 (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI) &&266 test_bit(BT_OP_SCAN, &btcoex->op_flags)))267 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);268 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)269 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);270 271 ath9k_hw_btcoex_enable(ah);272 spin_unlock_bh(&btcoex->btcoex_lock);273 ath9k_ps_restore(sc);274}275 276static void ath_init_btcoex_timer(struct ath_softc *sc)277{278 struct ath_btcoex *btcoex = &sc->btcoex;279 280 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;281 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *282 btcoex->btcoex_period / 100;283 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *284 btcoex->btcoex_period / 100;285 btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;286 287 timer_setup(&btcoex->period_timer, ath_btcoex_period_timer, 0);288 timer_setup(&btcoex->no_stomp_timer, ath_btcoex_no_stomp_timer, 0);289 290 spin_lock_init(&btcoex->btcoex_lock);291}292 293/*294 * (Re)start btcoex timers295 */296void ath9k_btcoex_timer_resume(struct ath_softc *sc)297{298 struct ath_btcoex *btcoex = &sc->btcoex;299 struct ath_hw *ah = sc->sc_ah;300 301 if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_3WIRE &&302 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI)303 return;304 305 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n");306 307 /* make sure duty cycle timer is also stopped when resuming */308 del_timer_sync(&btcoex->no_stomp_timer);309 310 btcoex->bt_priority_cnt = 0;311 btcoex->bt_priority_time = jiffies;312 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);313 clear_bit(BT_OP_SCAN, &btcoex->op_flags);314 315 mod_timer(&btcoex->period_timer, jiffies);316}317 318/*319 * Pause btcoex timer and bt duty cycle timer320 */321void ath9k_btcoex_timer_pause(struct ath_softc *sc)322{323 struct ath_btcoex *btcoex = &sc->btcoex;324 struct ath_hw *ah = sc->sc_ah;325 326 if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_3WIRE &&327 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI)328 return;329 330 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Stopping btcoex timers\n");331 332 del_timer_sync(&btcoex->period_timer);333 del_timer_sync(&btcoex->no_stomp_timer);334}335 336void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc)337{338 struct ath_btcoex *btcoex = &sc->btcoex;339 340 del_timer_sync(&btcoex->no_stomp_timer);341}342 343u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen)344{345 struct ath_btcoex *btcoex = &sc->btcoex;346 struct ath_mci_profile *mci = &sc->btcoex.mci;347 u16 aggr_limit = 0;348 349 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit)350 aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4;351 else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags))352 aggr_limit = min((max_4ms_framelen * 3) / 8,353 (u32)ATH_AMPDU_LIMIT_MAX);354 355 return aggr_limit;356}357 358void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status)359{360 if (status & ATH9K_INT_MCI)361 ath_mci_intr(sc);362}363 364void ath9k_start_btcoex(struct ath_softc *sc)365{366 struct ath_hw *ah = sc->sc_ah;367 368 if (ah->btcoex_hw.enabled ||369 ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE)370 return;371 372 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))373 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,374 AR_STOMP_LOW_WLAN_WGHT, 0);375 else376 ath9k_hw_btcoex_set_weight(ah, 0, 0,377 ATH_BTCOEX_STOMP_NONE);378 ath9k_hw_btcoex_enable(ah);379 ath9k_btcoex_timer_resume(sc);380}381 382void ath9k_stop_btcoex(struct ath_softc *sc)383{384 struct ath_hw *ah = sc->sc_ah;385 386 if (!ah->btcoex_hw.enabled ||387 ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE)388 return;389 390 ath9k_btcoex_timer_pause(sc);391 ath9k_hw_btcoex_disable(ah);392 393 if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)394 ath_mci_flush_profile(&sc->btcoex.mci);395}396 397void ath9k_deinit_btcoex(struct ath_softc *sc)398{399 struct ath_hw *ah = sc->sc_ah;400 401 if (ath9k_hw_mci_is_enabled(ah))402 ath_mci_cleanup(sc);403 else {404 enum ath_btcoex_scheme scheme = ath9k_hw_get_btcoex_scheme(ah);405 406 if (scheme == ATH_BTCOEX_CFG_2WIRE ||407 scheme == ATH_BTCOEX_CFG_3WIRE)408 ath9k_hw_btcoex_deinit(sc->sc_ah);409 }410}411 412int ath9k_init_btcoex(struct ath_softc *sc)413{414 struct ath_txq *txq;415 struct ath_hw *ah = sc->sc_ah;416 int r;417 418 ath9k_hw_btcoex_init_scheme(ah);419 420 switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) {421 case ATH_BTCOEX_CFG_NONE:422 break;423 case ATH_BTCOEX_CFG_2WIRE:424 ath9k_hw_btcoex_init_2wire(sc->sc_ah);425 break;426 case ATH_BTCOEX_CFG_3WIRE:427 ath9k_hw_btcoex_init_3wire(sc->sc_ah);428 ath_init_btcoex_timer(sc);429 txq = sc->tx.txq_map[IEEE80211_AC_BE];430 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);431 break;432 case ATH_BTCOEX_CFG_MCI:433 ath_init_btcoex_timer(sc);434 435 sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;436 INIT_LIST_HEAD(&sc->btcoex.mci.info);437 ath9k_hw_btcoex_init_mci(ah);438 439 r = ath_mci_setup(sc);440 if (r)441 return r;442 443 break;444 default:445 WARN_ON(1);446 break;447 }448 449 return 0;450}451 452static int ath9k_dump_mci_btcoex(struct ath_softc *sc, u8 *buf, u32 size)453{454 struct ath_btcoex *btcoex = &sc->btcoex;455 struct ath_mci_profile *mci = &btcoex->mci;456 struct ath_hw *ah = sc->sc_ah;457 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;458 u32 len = 0;459 int i;460 461 ATH_DUMP_BTCOEX("Total BT profiles", NUM_PROF(mci));462 ATH_DUMP_BTCOEX("MGMT", mci->num_mgmt);463 ATH_DUMP_BTCOEX("SCO", mci->num_sco);464 ATH_DUMP_BTCOEX("A2DP", mci->num_a2dp);465 ATH_DUMP_BTCOEX("HID", mci->num_hid);466 ATH_DUMP_BTCOEX("PAN", mci->num_pan);467 ATH_DUMP_BTCOEX("ACL", mci->num_other_acl);468 ATH_DUMP_BTCOEX("BDR", mci->num_bdr);469 ATH_DUMP_BTCOEX("Aggr. Limit", mci->aggr_limit);470 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type);471 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period);472 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle);473 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time);474 ATH_DUMP_BTCOEX("Concurrent Tx", btcoex_hw->mci.concur_tx);475 ATH_DUMP_BTCOEX("Concurrent RSSI cnt", btcoex->rssi_count);476 477 len += scnprintf(buf + len, size - len, "BT Weights: ");478 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)479 len += scnprintf(buf + len, size - len, "%08x ",480 btcoex_hw->bt_weight[i]);481 len += scnprintf(buf + len, size - len, "\n");482 len += scnprintf(buf + len, size - len, "WLAN Weights: ");483 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)484 len += scnprintf(buf + len, size - len, "%08x ",485 btcoex_hw->wlan_weight[i]);486 len += scnprintf(buf + len, size - len, "\n");487 len += scnprintf(buf + len, size - len, "Tx Priorities: ");488 for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)489 len += scnprintf(buf + len, size - len, "%08x ",490 btcoex_hw->tx_prio[i]);491 492 len += scnprintf(buf + len, size - len, "\n");493 494 return len;495}496 497static int ath9k_dump_legacy_btcoex(struct ath_softc *sc, u8 *buf, u32 size)498{499 500 struct ath_btcoex *btcoex = &sc->btcoex;501 u32 len = 0;502 503 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type);504 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period);505 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle);506 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time);507 508 return len;509}510 511int ath9k_dump_btcoex(struct ath_softc *sc, u8 *buf, u32 size)512{513 if (ath9k_hw_mci_is_enabled(sc->sc_ah))514 return ath9k_dump_mci_btcoex(sc, buf, size);515 else516 return ath9k_dump_legacy_btcoex(sc, buf, size);517}518 519#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */520