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1/*2 * Copyright (c) 2010-2011 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 "htc.h"18 19/******************/20/* BTCOEX */21/******************/22 23#define ATH_HTC_BTCOEX_PRODUCT_ID "wb193"24 25#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT26 27/*28 * Detects if there is any priority bt traffic29 */30static void ath_detect_bt_priority(struct ath9k_htc_priv *priv)31{32 struct ath_btcoex *btcoex = &priv->btcoex;33 struct ath_hw *ah = priv->ah;34 35 if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio))36 btcoex->bt_priority_cnt++;37 38 if (time_after(jiffies, btcoex->bt_priority_time +39 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {40 clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);41 clear_bit(OP_BT_SCAN, &priv->op_flags);42 /* Detect if colocated bt started scanning */43 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {44 ath_dbg(ath9k_hw_common(ah), BTCOEX,45 "BT scan detected\n");46 set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);47 set_bit(OP_BT_SCAN, &priv->op_flags);48 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {49 ath_dbg(ath9k_hw_common(ah), BTCOEX,50 "BT priority traffic detected\n");51 set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);52 }53 54 btcoex->bt_priority_cnt = 0;55 btcoex->bt_priority_time = jiffies;56 }57}58 59/*60 * This is the master bt coex work which runs for every61 * 45ms, bt traffic will be given priority during 55% of this62 * period while wlan gets remaining 45%63 */64static void ath_btcoex_period_work(struct work_struct *work)65{66 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,67 coex_period_work.work);68 struct ath_btcoex *btcoex = &priv->btcoex;69 struct ath_common *common = ath9k_hw_common(priv->ah);70 u32 timer_period;71 int ret;72 73 ath_detect_bt_priority(priv);74 75 ret = ath9k_htc_update_cap_target(priv,76 test_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags));77 if (ret) {78 ath_err(common, "Unable to set BTCOEX parameters\n");79 return;80 }81 82 ath9k_hw_btcoex_bt_stomp(priv->ah, test_bit(OP_BT_SCAN, &priv->op_flags) ?83 ATH_BTCOEX_STOMP_ALL : btcoex->bt_stomp_type);84 85 ath9k_hw_btcoex_enable(priv->ah);86 timer_period = test_bit(OP_BT_SCAN, &priv->op_flags) ?87 btcoex->btscan_no_stomp : btcoex->btcoex_no_stomp;88 ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work,89 msecs_to_jiffies(timer_period));90 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work,91 msecs_to_jiffies(btcoex->btcoex_period));92}93 94/*95 * Work to time slice between wlan and bt traffic and96 * configure weight registers97 */98static void ath_btcoex_duty_cycle_work(struct work_struct *work)99{100 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,101 duty_cycle_work.work);102 struct ath_hw *ah = priv->ah;103 struct ath_btcoex *btcoex = &priv->btcoex;104 struct ath_common *common = ath9k_hw_common(ah);105 106 ath_dbg(common, BTCOEX, "time slice work for bt and wlan\n");107 108 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||109 test_bit(OP_BT_SCAN, &priv->op_flags))110 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);111 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)112 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);113 114 ath9k_hw_btcoex_enable(priv->ah);115}116 117static void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv)118{119 struct ath_btcoex *btcoex = &priv->btcoex;120 121 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;122 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *123 btcoex->btcoex_period / 100;124 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *125 btcoex->btcoex_period / 100;126 INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work);127 INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work);128}129 130/*131 * (Re)start btcoex work132 */133 134static void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)135{136 struct ath_btcoex *btcoex = &priv->btcoex;137 struct ath_hw *ah = priv->ah;138 139 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n");140 141 btcoex->bt_priority_cnt = 0;142 btcoex->bt_priority_time = jiffies;143 clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);144 clear_bit(OP_BT_SCAN, &priv->op_flags);145 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0);146}147 148 149/*150 * Cancel btcoex and bt duty cycle work.151 */152static void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv)153{154 cancel_delayed_work_sync(&priv->coex_period_work);155 cancel_delayed_work_sync(&priv->duty_cycle_work);156}157 158void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv)159{160 struct ath_hw *ah = priv->ah;161 162 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) {163 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,164 AR_STOMP_LOW_WLAN_WGHT, 0);165 ath9k_hw_btcoex_enable(ah);166 ath_htc_resume_btcoex_work(priv);167 }168}169 170void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv)171{172 struct ath_hw *ah = priv->ah;173 174 if (ah->btcoex_hw.enabled &&175 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {176 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)177 ath_htc_cancel_btcoex_work(priv);178 ath9k_hw_btcoex_disable(ah);179 }180}181 182void ath9k_htc_init_btcoex(struct ath9k_htc_priv *priv, char *product)183{184 struct ath_hw *ah = priv->ah;185 struct ath_common *common = ath9k_hw_common(ah);186 int qnum;187 188 /*189 * Check if BTCOEX is globally disabled.190 */191 if (!common->btcoex_enabled) {192 ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_NONE;193 return;194 }195 196 if (product && strncmp(product, ATH_HTC_BTCOEX_PRODUCT_ID, 5) == 0) {197 ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_3WIRE;198 }199 200 switch (ath9k_hw_get_btcoex_scheme(priv->ah)) {201 case ATH_BTCOEX_CFG_NONE:202 break;203 case ATH_BTCOEX_CFG_3WIRE:204 priv->ah->btcoex_hw.btactive_gpio = 7;205 priv->ah->btcoex_hw.btpriority_gpio = 6;206 priv->ah->btcoex_hw.wlanactive_gpio = 8;207 priv->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;208 ath9k_hw_btcoex_init_3wire(priv->ah);209 ath_htc_init_btcoex_work(priv);210 qnum = priv->hwq_map[IEEE80211_AC_BE];211 ath9k_hw_init_btcoex_hw(priv->ah, qnum);212 break;213 default:214 WARN_ON(1);215 break;216 }217}218 219#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */220 221/*******/222/* LED */223/*******/224 225#ifdef CONFIG_MAC80211_LEDS226void ath9k_led_work(struct work_struct *work)227{228 struct ath9k_htc_priv *priv = container_of(work,229 struct ath9k_htc_priv,230 led_work);231 232 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin,233 (priv->brightness == LED_OFF));234}235 236static void ath9k_led_brightness(struct led_classdev *led_cdev,237 enum led_brightness brightness)238{239 struct ath9k_htc_priv *priv = container_of(led_cdev,240 struct ath9k_htc_priv,241 led_cdev);242 243 /* Not locked, but it's just a tiny green light..*/244 priv->brightness = brightness;245 ieee80211_queue_work(priv->hw, &priv->led_work);246}247 248void ath9k_deinit_leds(struct ath9k_htc_priv *priv)249{250 if (!priv->led_registered)251 return;252 253 ath9k_led_brightness(&priv->led_cdev, LED_OFF);254 led_classdev_unregister(&priv->led_cdev);255 cancel_work_sync(&priv->led_work);256 257 ath9k_hw_gpio_free(priv->ah, priv->ah->led_pin);258}259 260 261void ath9k_configure_leds(struct ath9k_htc_priv *priv)262{263 /* Configure gpio 1 for output */264 ath9k_hw_gpio_request_out(priv->ah, priv->ah->led_pin,265 "ath9k-led",266 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);267 /* LED off, active low */268 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1);269}270 271void ath9k_init_leds(struct ath9k_htc_priv *priv)272{273 int ret;274 275 if (AR_SREV_9287(priv->ah))276 priv->ah->led_pin = ATH_LED_PIN_9287;277 else if (AR_SREV_9271(priv->ah))278 priv->ah->led_pin = ATH_LED_PIN_9271;279 else if (AR_DEVID_7010(priv->ah))280 priv->ah->led_pin = ATH_LED_PIN_7010;281 else282 priv->ah->led_pin = ATH_LED_PIN_DEF;283 284 if (!ath9k_htc_led_blink)285 priv->led_cdev.default_trigger =286 ieee80211_get_radio_led_name(priv->hw);287 288 ath9k_configure_leds(priv);289 290 snprintf(priv->led_name, sizeof(priv->led_name),291 "ath9k_htc-%s", wiphy_name(priv->hw->wiphy));292 priv->led_cdev.name = priv->led_name;293 priv->led_cdev.brightness_set = ath9k_led_brightness;294 295 ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev);296 if (ret < 0)297 return;298 299 INIT_WORK(&priv->led_work, ath9k_led_work);300 priv->led_registered = true;301 302 return;303}304#endif305 306/*******************/307/* Rfkill */308/*******************/309 310static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv)311{312 bool is_blocked;313 314 ath9k_htc_ps_wakeup(priv);315 is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) ==316 priv->ah->rfkill_polarity;317 ath9k_htc_ps_restore(priv);318 319 return is_blocked;320}321 322void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw)323{324 struct ath9k_htc_priv *priv = hw->priv;325 bool blocked = !!ath_is_rfkill_set(priv);326 327 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);328}329 330void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv)331{332 if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)333 wiphy_rfkill_start_polling(priv->hw->wiphy);334}335