1 /* 2 * Copyright (c) 2010 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 /* 24 * Detects if there is any priority bt traffic 25 */ 26 static void ath_detect_bt_priority(struct ath9k_htc_priv *priv) 27 { 28 struct ath_btcoex *btcoex = &priv->btcoex; 29 struct ath_hw *ah = priv->ah; 30 31 if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio)) 32 btcoex->bt_priority_cnt++; 33 34 if (time_after(jiffies, btcoex->bt_priority_time + 35 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { 36 priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); 37 /* Detect if colocated bt started scanning */ 38 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 39 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, 40 "BT scan detected\n"); 41 priv->op_flags |= (OP_BT_SCAN | 42 OP_BT_PRIORITY_DETECTED); 43 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 44 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, 45 "BT priority traffic detected\n"); 46 priv->op_flags |= OP_BT_PRIORITY_DETECTED; 47 } 48 49 btcoex->bt_priority_cnt = 0; 50 btcoex->bt_priority_time = jiffies; 51 } 52 } 53 54 /* 55 * This is the master bt coex work which runs for every 56 * 45ms, bt traffic will be given priority during 55% of this 57 * period while wlan gets remaining 45% 58 */ 59 static void ath_btcoex_period_work(struct work_struct *work) 60 { 61 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, 62 coex_period_work.work); 63 struct ath_btcoex *btcoex = &priv->btcoex; 64 struct ath_common *common = ath9k_hw_common(priv->ah); 65 u32 timer_period; 66 bool is_btscan; 67 int ret; 68 u8 cmd_rsp, aggr; 69 70 ath_detect_bt_priority(priv); 71 72 is_btscan = !!(priv->op_flags & OP_BT_SCAN); 73 74 aggr = priv->op_flags & OP_BT_PRIORITY_DETECTED; 75 76 WMI_CMD_BUF(WMI_AGGR_LIMIT_CMD, &aggr); 77 78 ath9k_cmn_btcoex_bt_stomp(common, is_btscan ? ATH_BTCOEX_STOMP_ALL : 79 btcoex->bt_stomp_type); 80 81 timer_period = is_btscan ? btcoex->btscan_no_stomp : 82 btcoex->btcoex_no_stomp; 83 ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work, 84 msecs_to_jiffies(timer_period)); 85 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 86 msecs_to_jiffies(btcoex->btcoex_period)); 87 } 88 89 /* 90 * Work to time slice between wlan and bt traffic and 91 * configure weight registers 92 */ 93 static void ath_btcoex_duty_cycle_work(struct work_struct *work) 94 { 95 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, 96 duty_cycle_work.work); 97 struct ath_hw *ah = priv->ah; 98 struct ath_btcoex *btcoex = &priv->btcoex; 99 struct ath_common *common = ath9k_hw_common(ah); 100 bool is_btscan = priv->op_flags & OP_BT_SCAN; 101 102 ath_dbg(common, ATH_DBG_BTCOEX, 103 "time slice work for bt and wlan\n"); 104 105 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) 106 ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_NONE); 107 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 108 ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_LOW); 109 } 110 111 void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv) 112 { 113 struct ath_btcoex *btcoex = &priv->btcoex; 114 115 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; 116 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 117 btcoex->btcoex_period / 100; 118 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 119 btcoex->btcoex_period / 100; 120 INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work); 121 INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work); 122 } 123 124 /* 125 * (Re)start btcoex work 126 */ 127 128 void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv) 129 { 130 struct ath_btcoex *btcoex = &priv->btcoex; 131 struct ath_hw *ah = priv->ah; 132 133 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, "Starting btcoex work\n"); 134 135 btcoex->bt_priority_cnt = 0; 136 btcoex->bt_priority_time = jiffies; 137 priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); 138 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0); 139 } 140 141 142 /* 143 * Cancel btcoex and bt duty cycle work. 144 */ 145 void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv) 146 { 147 cancel_delayed_work_sync(&priv->coex_period_work); 148 cancel_delayed_work_sync(&priv->duty_cycle_work); 149 } 150 151 /*******/ 152 /* LED */ 153 /*******/ 154 155 static void ath9k_led_blink_work(struct work_struct *work) 156 { 157 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, 158 ath9k_led_blink_work.work); 159 160 if (!(priv->op_flags & OP_LED_ASSOCIATED)) 161 return; 162 163 if ((priv->led_on_duration == ATH_LED_ON_DURATION_IDLE) || 164 (priv->led_off_duration == ATH_LED_OFF_DURATION_IDLE)) 165 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 0); 166 else 167 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 168 (priv->op_flags & OP_LED_ON) ? 1 : 0); 169 170 ieee80211_queue_delayed_work(priv->hw, 171 &priv->ath9k_led_blink_work, 172 (priv->op_flags & OP_LED_ON) ? 173 msecs_to_jiffies(priv->led_off_duration) : 174 msecs_to_jiffies(priv->led_on_duration)); 175 176 priv->led_on_duration = priv->led_on_cnt ? 177 max((ATH_LED_ON_DURATION_IDLE - priv->led_on_cnt), 25) : 178 ATH_LED_ON_DURATION_IDLE; 179 priv->led_off_duration = priv->led_off_cnt ? 180 max((ATH_LED_OFF_DURATION_IDLE - priv->led_off_cnt), 10) : 181 ATH_LED_OFF_DURATION_IDLE; 182 priv->led_on_cnt = priv->led_off_cnt = 0; 183 184 if (priv->op_flags & OP_LED_ON) 185 priv->op_flags &= ~OP_LED_ON; 186 else 187 priv->op_flags |= OP_LED_ON; 188 } 189 190 static void ath9k_led_brightness_work(struct work_struct *work) 191 { 192 struct ath_led *led = container_of(work, struct ath_led, 193 brightness_work.work); 194 struct ath9k_htc_priv *priv = led->priv; 195 196 switch (led->brightness) { 197 case LED_OFF: 198 if (led->led_type == ATH_LED_ASSOC || 199 led->led_type == ATH_LED_RADIO) { 200 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 201 (led->led_type == ATH_LED_RADIO)); 202 priv->op_flags &= ~OP_LED_ASSOCIATED; 203 if (led->led_type == ATH_LED_RADIO) 204 priv->op_flags &= ~OP_LED_ON; 205 } else { 206 priv->led_off_cnt++; 207 } 208 break; 209 case LED_FULL: 210 if (led->led_type == ATH_LED_ASSOC) { 211 priv->op_flags |= OP_LED_ASSOCIATED; 212 ieee80211_queue_delayed_work(priv->hw, 213 &priv->ath9k_led_blink_work, 0); 214 } else if (led->led_type == ATH_LED_RADIO) { 215 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 0); 216 priv->op_flags |= OP_LED_ON; 217 } else { 218 priv->led_on_cnt++; 219 } 220 break; 221 default: 222 break; 223 } 224 } 225 226 static void ath9k_led_brightness(struct led_classdev *led_cdev, 227 enum led_brightness brightness) 228 { 229 struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev); 230 struct ath9k_htc_priv *priv = led->priv; 231 232 led->brightness = brightness; 233 if (!(priv->op_flags & OP_LED_DEINIT)) 234 ieee80211_queue_delayed_work(priv->hw, 235 &led->brightness_work, 0); 236 } 237 238 void ath9k_led_stop_brightness(struct ath9k_htc_priv *priv) 239 { 240 cancel_delayed_work_sync(&priv->radio_led.brightness_work); 241 cancel_delayed_work_sync(&priv->assoc_led.brightness_work); 242 cancel_delayed_work_sync(&priv->tx_led.brightness_work); 243 cancel_delayed_work_sync(&priv->rx_led.brightness_work); 244 } 245 246 static int ath9k_register_led(struct ath9k_htc_priv *priv, struct ath_led *led, 247 char *trigger) 248 { 249 int ret; 250 251 led->priv = priv; 252 led->led_cdev.name = led->name; 253 led->led_cdev.default_trigger = trigger; 254 led->led_cdev.brightness_set = ath9k_led_brightness; 255 256 ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &led->led_cdev); 257 if (ret) 258 ath_err(ath9k_hw_common(priv->ah), 259 "Failed to register led:%s", led->name); 260 else 261 led->registered = 1; 262 263 INIT_DELAYED_WORK(&led->brightness_work, ath9k_led_brightness_work); 264 265 return ret; 266 } 267 268 static void ath9k_unregister_led(struct ath_led *led) 269 { 270 if (led->registered) { 271 led_classdev_unregister(&led->led_cdev); 272 led->registered = 0; 273 } 274 } 275 276 void ath9k_deinit_leds(struct ath9k_htc_priv *priv) 277 { 278 priv->op_flags |= OP_LED_DEINIT; 279 ath9k_unregister_led(&priv->assoc_led); 280 priv->op_flags &= ~OP_LED_ASSOCIATED; 281 ath9k_unregister_led(&priv->tx_led); 282 ath9k_unregister_led(&priv->rx_led); 283 ath9k_unregister_led(&priv->radio_led); 284 } 285 286 void ath9k_init_leds(struct ath9k_htc_priv *priv) 287 { 288 char *trigger; 289 int ret; 290 291 if (AR_SREV_9287(priv->ah)) 292 priv->ah->led_pin = ATH_LED_PIN_9287; 293 else if (AR_SREV_9271(priv->ah)) 294 priv->ah->led_pin = ATH_LED_PIN_9271; 295 else if (AR_DEVID_7010(priv->ah)) 296 priv->ah->led_pin = ATH_LED_PIN_7010; 297 else 298 priv->ah->led_pin = ATH_LED_PIN_DEF; 299 300 /* Configure gpio 1 for output */ 301 ath9k_hw_cfg_output(priv->ah, priv->ah->led_pin, 302 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 303 /* LED off, active low */ 304 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1); 305 306 INIT_DELAYED_WORK(&priv->ath9k_led_blink_work, ath9k_led_blink_work); 307 308 trigger = ieee80211_get_radio_led_name(priv->hw); 309 snprintf(priv->radio_led.name, sizeof(priv->radio_led.name), 310 "ath9k-%s::radio", wiphy_name(priv->hw->wiphy)); 311 ret = ath9k_register_led(priv, &priv->radio_led, trigger); 312 priv->radio_led.led_type = ATH_LED_RADIO; 313 if (ret) 314 goto fail; 315 316 trigger = ieee80211_get_assoc_led_name(priv->hw); 317 snprintf(priv->assoc_led.name, sizeof(priv->assoc_led.name), 318 "ath9k-%s::assoc", wiphy_name(priv->hw->wiphy)); 319 ret = ath9k_register_led(priv, &priv->assoc_led, trigger); 320 priv->assoc_led.led_type = ATH_LED_ASSOC; 321 if (ret) 322 goto fail; 323 324 trigger = ieee80211_get_tx_led_name(priv->hw); 325 snprintf(priv->tx_led.name, sizeof(priv->tx_led.name), 326 "ath9k-%s::tx", wiphy_name(priv->hw->wiphy)); 327 ret = ath9k_register_led(priv, &priv->tx_led, trigger); 328 priv->tx_led.led_type = ATH_LED_TX; 329 if (ret) 330 goto fail; 331 332 trigger = ieee80211_get_rx_led_name(priv->hw); 333 snprintf(priv->rx_led.name, sizeof(priv->rx_led.name), 334 "ath9k-%s::rx", wiphy_name(priv->hw->wiphy)); 335 ret = ath9k_register_led(priv, &priv->rx_led, trigger); 336 priv->rx_led.led_type = ATH_LED_RX; 337 if (ret) 338 goto fail; 339 340 priv->op_flags &= ~OP_LED_DEINIT; 341 342 return; 343 344 fail: 345 cancel_delayed_work_sync(&priv->ath9k_led_blink_work); 346 ath9k_deinit_leds(priv); 347 } 348 349 /*******************/ 350 /* Rfkill */ 351 /*******************/ 352 353 static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv) 354 { 355 return ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) == 356 priv->ah->rfkill_polarity; 357 } 358 359 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw) 360 { 361 struct ath9k_htc_priv *priv = hw->priv; 362 bool blocked = !!ath_is_rfkill_set(priv); 363 364 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 365 } 366 367 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv) 368 { 369 if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 370 wiphy_rfkill_start_polling(priv->hw->wiphy); 371 } 372 373 void ath9k_htc_radio_enable(struct ieee80211_hw *hw) 374 { 375 struct ath9k_htc_priv *priv = hw->priv; 376 struct ath_hw *ah = priv->ah; 377 struct ath_common *common = ath9k_hw_common(ah); 378 int ret; 379 u8 cmd_rsp; 380 381 if (!ah->curchan) 382 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 383 384 /* Reset the HW */ 385 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 386 if (ret) { 387 ath_err(common, 388 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 389 ret, ah->curchan->channel); 390 } 391 392 ath_update_txpow(priv); 393 394 /* Start RX */ 395 WMI_CMD(WMI_START_RECV_CMDID); 396 ath9k_host_rx_init(priv); 397 398 /* Start TX */ 399 htc_start(priv->htc); 400 spin_lock_bh(&priv->tx_lock); 401 priv->tx_queues_stop = false; 402 spin_unlock_bh(&priv->tx_lock); 403 ieee80211_wake_queues(hw); 404 405 WMI_CMD(WMI_ENABLE_INTR_CMDID); 406 407 /* Enable LED */ 408 ath9k_hw_cfg_output(ah, ah->led_pin, 409 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 410 ath9k_hw_set_gpio(ah, ah->led_pin, 0); 411 } 412 413 void ath9k_htc_radio_disable(struct ieee80211_hw *hw) 414 { 415 struct ath9k_htc_priv *priv = hw->priv; 416 struct ath_hw *ah = priv->ah; 417 struct ath_common *common = ath9k_hw_common(ah); 418 int ret; 419 u8 cmd_rsp; 420 421 ath9k_htc_ps_wakeup(priv); 422 423 /* Disable LED */ 424 ath9k_hw_set_gpio(ah, ah->led_pin, 1); 425 ath9k_hw_cfg_gpio_input(ah, ah->led_pin); 426 427 WMI_CMD(WMI_DISABLE_INTR_CMDID); 428 429 /* Stop TX */ 430 ieee80211_stop_queues(hw); 431 htc_stop(priv->htc); 432 WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID); 433 skb_queue_purge(&priv->tx_queue); 434 435 /* Stop RX */ 436 WMI_CMD(WMI_STOP_RECV_CMDID); 437 438 /* 439 * The MIB counters have to be disabled here, 440 * since the target doesn't do it. 441 */ 442 ath9k_hw_disable_mib_counters(ah); 443 444 if (!ah->curchan) 445 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 446 447 /* Reset the HW */ 448 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 449 if (ret) { 450 ath_err(common, 451 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 452 ret, ah->curchan->channel); 453 } 454 455 /* Disable the PHY */ 456 ath9k_hw_phy_disable(ah); 457 458 ath9k_htc_ps_restore(priv); 459 ath9k_htc_setpower(priv, ATH9K_PM_FULL_SLEEP); 460 } 461