1 /* 2 * Copyright (c) 2010-2011 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 "htc.h" 18 19 /******************/ 20 /* BTCOEX */ 21 /******************/ 22 23 #define ATH_HTC_BTCOEX_PRODUCT_ID "wb193" 24 25 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT 26 27 /* 28 * Detects if there is any priority bt traffic 29 */ 30 static 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 every 61 * 45ms, bt traffic will be given priority during 55% of this 62 * period while wlan gets remaining 45% 63 */ 64 static 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 and 96 * configure weight registers 97 */ 98 static 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 } 116 117 static 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 work 132 */ 133 134 static 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 */ 152 static 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 } 157 158 void 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 } 169 170 void 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 } 181 182 void 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_LEDS 226 void 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 } 235 236 static 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 } 247 248 void 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 } 257 258 259 void ath9k_configure_leds(struct ath9k_htc_priv *priv) 260 { 261 /* Configure gpio 1 for output */ 262 ath9k_hw_cfg_output(priv->ah, priv->ah->led_pin, 263 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 264 /* LED off, active low */ 265 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1); 266 267 } 268 269 void ath9k_init_leds(struct ath9k_htc_priv *priv) 270 { 271 int ret; 272 273 if (AR_SREV_9287(priv->ah)) 274 priv->ah->led_pin = ATH_LED_PIN_9287; 275 else if (AR_SREV_9271(priv->ah)) 276 priv->ah->led_pin = ATH_LED_PIN_9271; 277 else if (AR_DEVID_7010(priv->ah)) 278 priv->ah->led_pin = ATH_LED_PIN_7010; 279 else 280 priv->ah->led_pin = ATH_LED_PIN_DEF; 281 282 ath9k_configure_leds(priv); 283 284 snprintf(priv->led_name, sizeof(priv->led_name), 285 "ath9k_htc-%s", wiphy_name(priv->hw->wiphy)); 286 priv->led_cdev.name = priv->led_name; 287 priv->led_cdev.brightness_set = ath9k_led_brightness; 288 289 ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev); 290 if (ret < 0) 291 return; 292 293 INIT_WORK(&priv->led_work, ath9k_led_work); 294 priv->led_registered = true; 295 296 return; 297 } 298 #endif 299 300 /*******************/ 301 /* Rfkill */ 302 /*******************/ 303 304 static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv) 305 { 306 bool is_blocked; 307 308 ath9k_htc_ps_wakeup(priv); 309 is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) == 310 priv->ah->rfkill_polarity; 311 ath9k_htc_ps_restore(priv); 312 313 return is_blocked; 314 } 315 316 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw) 317 { 318 struct ath9k_htc_priv *priv = hw->priv; 319 bool blocked = !!ath_is_rfkill_set(priv); 320 321 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 322 } 323 324 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv) 325 { 326 if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 327 wiphy_rfkill_start_polling(priv->hw->wiphy); 328 } 329