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 priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); 41 /* Detect if colocated bt started scanning */ 42 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 43 ath_dbg(ath9k_hw_common(ah), BTCOEX, 44 "BT scan detected\n"); 45 priv->op_flags |= (OP_BT_SCAN | 46 OP_BT_PRIORITY_DETECTED); 47 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 48 ath_dbg(ath9k_hw_common(ah), BTCOEX, 49 "BT priority traffic detected\n"); 50 priv->op_flags |= OP_BT_PRIORITY_DETECTED; 51 } 52 53 btcoex->bt_priority_cnt = 0; 54 btcoex->bt_priority_time = jiffies; 55 } 56 } 57 58 /* 59 * This is the master bt coex work which runs for every 60 * 45ms, bt traffic will be given priority during 55% of this 61 * period while wlan gets remaining 45% 62 */ 63 static void ath_btcoex_period_work(struct work_struct *work) 64 { 65 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, 66 coex_period_work.work); 67 struct ath_btcoex *btcoex = &priv->btcoex; 68 struct ath_common *common = ath9k_hw_common(priv->ah); 69 u32 timer_period; 70 bool is_btscan; 71 int ret; 72 73 ath_detect_bt_priority(priv); 74 75 is_btscan = !!(priv->op_flags & OP_BT_SCAN); 76 77 ret = ath9k_htc_update_cap_target(priv, 78 !!(priv->op_flags & OP_BT_PRIORITY_DETECTED)); 79 if (ret) { 80 ath_err(common, "Unable to set BTCOEX parameters\n"); 81 return; 82 } 83 84 ath9k_hw_btcoex_bt_stomp(priv->ah, is_btscan ? ATH_BTCOEX_STOMP_ALL : 85 btcoex->bt_stomp_type); 86 87 ath9k_hw_btcoex_enable(priv->ah); 88 timer_period = is_btscan ? btcoex->btscan_no_stomp : 89 btcoex->btcoex_no_stomp; 90 ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work, 91 msecs_to_jiffies(timer_period)); 92 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 93 msecs_to_jiffies(btcoex->btcoex_period)); 94 } 95 96 /* 97 * Work to time slice between wlan and bt traffic and 98 * configure weight registers 99 */ 100 static void ath_btcoex_duty_cycle_work(struct work_struct *work) 101 { 102 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, 103 duty_cycle_work.work); 104 struct ath_hw *ah = priv->ah; 105 struct ath_btcoex *btcoex = &priv->btcoex; 106 struct ath_common *common = ath9k_hw_common(ah); 107 bool is_btscan = priv->op_flags & OP_BT_SCAN; 108 109 ath_dbg(common, BTCOEX, "time slice work for bt and wlan\n"); 110 111 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) 112 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 113 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 114 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); 115 ath9k_hw_btcoex_enable(priv->ah); 116 } 117 118 static void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv) 119 { 120 struct ath_btcoex *btcoex = &priv->btcoex; 121 122 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; 123 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 124 btcoex->btcoex_period / 100; 125 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 126 btcoex->btcoex_period / 100; 127 INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work); 128 INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work); 129 } 130 131 /* 132 * (Re)start btcoex work 133 */ 134 135 static void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv) 136 { 137 struct ath_btcoex *btcoex = &priv->btcoex; 138 struct ath_hw *ah = priv->ah; 139 140 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n"); 141 142 btcoex->bt_priority_cnt = 0; 143 btcoex->bt_priority_time = jiffies; 144 priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); 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); 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 ath9k_hw_btcoex_disable(ah); 177 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE) 178 ath_htc_cancel_btcoex_work(priv); 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 int qnum; 186 187 if (product && strncmp(product, ATH_HTC_BTCOEX_PRODUCT_ID, 5) == 0) { 188 ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_3WIRE; 189 } 190 191 switch (ath9k_hw_get_btcoex_scheme(priv->ah)) { 192 case ATH_BTCOEX_CFG_NONE: 193 break; 194 case ATH_BTCOEX_CFG_3WIRE: 195 priv->ah->btcoex_hw.btactive_gpio = 7; 196 priv->ah->btcoex_hw.btpriority_gpio = 6; 197 priv->ah->btcoex_hw.wlanactive_gpio = 8; 198 priv->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW; 199 ath9k_hw_btcoex_init_3wire(priv->ah); 200 ath_htc_init_btcoex_work(priv); 201 qnum = priv->hwq_map[WME_AC_BE]; 202 ath9k_hw_init_btcoex_hw(priv->ah, qnum); 203 break; 204 default: 205 WARN_ON(1); 206 break; 207 } 208 } 209 210 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */ 211 212 /*******/ 213 /* LED */ 214 /*******/ 215 216 #ifdef CONFIG_MAC80211_LEDS 217 void ath9k_led_work(struct work_struct *work) 218 { 219 struct ath9k_htc_priv *priv = container_of(work, 220 struct ath9k_htc_priv, 221 led_work); 222 223 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 224 (priv->brightness == LED_OFF)); 225 } 226 227 static void ath9k_led_brightness(struct led_classdev *led_cdev, 228 enum led_brightness brightness) 229 { 230 struct ath9k_htc_priv *priv = container_of(led_cdev, 231 struct ath9k_htc_priv, 232 led_cdev); 233 234 /* Not locked, but it's just a tiny green light..*/ 235 priv->brightness = brightness; 236 ieee80211_queue_work(priv->hw, &priv->led_work); 237 } 238 239 void ath9k_deinit_leds(struct ath9k_htc_priv *priv) 240 { 241 if (!priv->led_registered) 242 return; 243 244 ath9k_led_brightness(&priv->led_cdev, LED_OFF); 245 led_classdev_unregister(&priv->led_cdev); 246 cancel_work_sync(&priv->led_work); 247 } 248 249 void ath9k_init_leds(struct ath9k_htc_priv *priv) 250 { 251 int ret; 252 253 if (AR_SREV_9287(priv->ah)) 254 priv->ah->led_pin = ATH_LED_PIN_9287; 255 else if (AR_SREV_9271(priv->ah)) 256 priv->ah->led_pin = ATH_LED_PIN_9271; 257 else if (AR_DEVID_7010(priv->ah)) 258 priv->ah->led_pin = ATH_LED_PIN_7010; 259 else 260 priv->ah->led_pin = ATH_LED_PIN_DEF; 261 262 /* Configure gpio 1 for output */ 263 ath9k_hw_cfg_output(priv->ah, priv->ah->led_pin, 264 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 265 /* LED off, active low */ 266 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1); 267 268 snprintf(priv->led_name, sizeof(priv->led_name), 269 "ath9k_htc-%s", wiphy_name(priv->hw->wiphy)); 270 priv->led_cdev.name = priv->led_name; 271 priv->led_cdev.brightness_set = ath9k_led_brightness; 272 273 ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev); 274 if (ret < 0) 275 return; 276 277 INIT_WORK(&priv->led_work, ath9k_led_work); 278 priv->led_registered = true; 279 280 return; 281 } 282 #endif 283 284 /*******************/ 285 /* Rfkill */ 286 /*******************/ 287 288 static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv) 289 { 290 bool is_blocked; 291 292 ath9k_htc_ps_wakeup(priv); 293 is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) == 294 priv->ah->rfkill_polarity; 295 ath9k_htc_ps_restore(priv); 296 297 return is_blocked; 298 } 299 300 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw) 301 { 302 struct ath9k_htc_priv *priv = hw->priv; 303 bool blocked = !!ath_is_rfkill_set(priv); 304 305 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 306 } 307 308 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv) 309 { 310 if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 311 wiphy_rfkill_start_polling(priv->hw->wiphy); 312 } 313 314 void ath9k_htc_radio_enable(struct ieee80211_hw *hw) 315 { 316 struct ath9k_htc_priv *priv = hw->priv; 317 struct ath_hw *ah = priv->ah; 318 struct ath_common *common = ath9k_hw_common(ah); 319 int ret; 320 u8 cmd_rsp; 321 322 if (!ah->curchan) 323 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 324 325 /* Reset the HW */ 326 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 327 if (ret) { 328 ath_err(common, 329 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 330 ret, ah->curchan->channel); 331 } 332 333 ath9k_cmn_update_txpow(ah, priv->curtxpow, priv->txpowlimit, 334 &priv->curtxpow); 335 336 /* Start RX */ 337 WMI_CMD(WMI_START_RECV_CMDID); 338 ath9k_host_rx_init(priv); 339 340 /* Start TX */ 341 htc_start(priv->htc); 342 spin_lock_bh(&priv->tx.tx_lock); 343 priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP; 344 spin_unlock_bh(&priv->tx.tx_lock); 345 ieee80211_wake_queues(hw); 346 347 WMI_CMD(WMI_ENABLE_INTR_CMDID); 348 349 /* Enable LED */ 350 ath9k_hw_cfg_output(ah, ah->led_pin, 351 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 352 ath9k_hw_set_gpio(ah, ah->led_pin, 0); 353 } 354 355 void ath9k_htc_radio_disable(struct ieee80211_hw *hw) 356 { 357 struct ath9k_htc_priv *priv = hw->priv; 358 struct ath_hw *ah = priv->ah; 359 struct ath_common *common = ath9k_hw_common(ah); 360 int ret; 361 u8 cmd_rsp; 362 363 ath9k_htc_ps_wakeup(priv); 364 365 /* Disable LED */ 366 ath9k_hw_set_gpio(ah, ah->led_pin, 1); 367 ath9k_hw_cfg_gpio_input(ah, ah->led_pin); 368 369 WMI_CMD(WMI_DISABLE_INTR_CMDID); 370 371 /* Stop TX */ 372 ieee80211_stop_queues(hw); 373 ath9k_htc_tx_drain(priv); 374 WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID); 375 376 /* Stop RX */ 377 WMI_CMD(WMI_STOP_RECV_CMDID); 378 379 /* Clear the WMI event queue */ 380 ath9k_wmi_event_drain(priv); 381 382 /* 383 * The MIB counters have to be disabled here, 384 * since the target doesn't do it. 385 */ 386 ath9k_hw_disable_mib_counters(ah); 387 388 if (!ah->curchan) 389 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 390 391 /* Reset the HW */ 392 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 393 if (ret) { 394 ath_err(common, 395 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 396 ret, ah->curchan->channel); 397 } 398 399 /* Disable the PHY */ 400 ath9k_hw_phy_disable(ah); 401 402 ath9k_htc_ps_restore(priv); 403 ath9k_htc_setpower(priv, ATH9K_PM_FULL_SLEEP); 404 } 405