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 69 ath_detect_bt_priority(priv); 70 71 is_btscan = !!(priv->op_flags & OP_BT_SCAN); 72 73 ret = ath9k_htc_update_cap_target(priv, 74 !!(priv->op_flags & OP_BT_PRIORITY_DETECTED)); 75 if (ret) { 76 ath_err(common, "Unable to set BTCOEX parameters\n"); 77 return; 78 } 79 80 ath9k_cmn_btcoex_bt_stomp(common, is_btscan ? ATH_BTCOEX_STOMP_ALL : 81 btcoex->bt_stomp_type); 82 83 timer_period = is_btscan ? btcoex->btscan_no_stomp : 84 btcoex->btcoex_no_stomp; 85 ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work, 86 msecs_to_jiffies(timer_period)); 87 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 88 msecs_to_jiffies(btcoex->btcoex_period)); 89 } 90 91 /* 92 * Work to time slice between wlan and bt traffic and 93 * configure weight registers 94 */ 95 static void ath_btcoex_duty_cycle_work(struct work_struct *work) 96 { 97 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, 98 duty_cycle_work.work); 99 struct ath_hw *ah = priv->ah; 100 struct ath_btcoex *btcoex = &priv->btcoex; 101 struct ath_common *common = ath9k_hw_common(ah); 102 bool is_btscan = priv->op_flags & OP_BT_SCAN; 103 104 ath_dbg(common, ATH_DBG_BTCOEX, 105 "time slice work for bt and wlan\n"); 106 107 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) 108 ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_NONE); 109 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 110 ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_LOW); 111 } 112 113 void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv) 114 { 115 struct ath_btcoex *btcoex = &priv->btcoex; 116 117 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; 118 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 119 btcoex->btcoex_period / 100; 120 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 121 btcoex->btcoex_period / 100; 122 INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work); 123 INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work); 124 } 125 126 /* 127 * (Re)start btcoex work 128 */ 129 130 void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv) 131 { 132 struct ath_btcoex *btcoex = &priv->btcoex; 133 struct ath_hw *ah = priv->ah; 134 135 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, "Starting btcoex work\n"); 136 137 btcoex->bt_priority_cnt = 0; 138 btcoex->bt_priority_time = jiffies; 139 priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); 140 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0); 141 } 142 143 144 /* 145 * Cancel btcoex and bt duty cycle work. 146 */ 147 void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv) 148 { 149 cancel_delayed_work_sync(&priv->coex_period_work); 150 cancel_delayed_work_sync(&priv->duty_cycle_work); 151 } 152 153 /*******/ 154 /* LED */ 155 /*******/ 156 157 static void ath9k_led_blink_work(struct work_struct *work) 158 { 159 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, 160 ath9k_led_blink_work.work); 161 162 if (!(priv->op_flags & OP_LED_ASSOCIATED)) 163 return; 164 165 if ((priv->led_on_duration == ATH_LED_ON_DURATION_IDLE) || 166 (priv->led_off_duration == ATH_LED_OFF_DURATION_IDLE)) 167 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 0); 168 else 169 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 170 (priv->op_flags & OP_LED_ON) ? 1 : 0); 171 172 ieee80211_queue_delayed_work(priv->hw, 173 &priv->ath9k_led_blink_work, 174 (priv->op_flags & OP_LED_ON) ? 175 msecs_to_jiffies(priv->led_off_duration) : 176 msecs_to_jiffies(priv->led_on_duration)); 177 178 priv->led_on_duration = priv->led_on_cnt ? 179 max((ATH_LED_ON_DURATION_IDLE - priv->led_on_cnt), 25) : 180 ATH_LED_ON_DURATION_IDLE; 181 priv->led_off_duration = priv->led_off_cnt ? 182 max((ATH_LED_OFF_DURATION_IDLE - priv->led_off_cnt), 10) : 183 ATH_LED_OFF_DURATION_IDLE; 184 priv->led_on_cnt = priv->led_off_cnt = 0; 185 186 if (priv->op_flags & OP_LED_ON) 187 priv->op_flags &= ~OP_LED_ON; 188 else 189 priv->op_flags |= OP_LED_ON; 190 } 191 192 static void ath9k_led_brightness_work(struct work_struct *work) 193 { 194 struct ath_led *led = container_of(work, struct ath_led, 195 brightness_work.work); 196 struct ath9k_htc_priv *priv = led->priv; 197 198 switch (led->brightness) { 199 case LED_OFF: 200 if (led->led_type == ATH_LED_ASSOC || 201 led->led_type == ATH_LED_RADIO) { 202 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 203 (led->led_type == ATH_LED_RADIO)); 204 priv->op_flags &= ~OP_LED_ASSOCIATED; 205 if (led->led_type == ATH_LED_RADIO) 206 priv->op_flags &= ~OP_LED_ON; 207 } else { 208 priv->led_off_cnt++; 209 } 210 break; 211 case LED_FULL: 212 if (led->led_type == ATH_LED_ASSOC) { 213 priv->op_flags |= OP_LED_ASSOCIATED; 214 ieee80211_queue_delayed_work(priv->hw, 215 &priv->ath9k_led_blink_work, 0); 216 } else if (led->led_type == ATH_LED_RADIO) { 217 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 0); 218 priv->op_flags |= OP_LED_ON; 219 } else { 220 priv->led_on_cnt++; 221 } 222 break; 223 default: 224 break; 225 } 226 } 227 228 static void ath9k_led_brightness(struct led_classdev *led_cdev, 229 enum led_brightness brightness) 230 { 231 struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev); 232 struct ath9k_htc_priv *priv = led->priv; 233 234 led->brightness = brightness; 235 if (!(priv->op_flags & OP_LED_DEINIT)) 236 ieee80211_queue_delayed_work(priv->hw, 237 &led->brightness_work, 0); 238 } 239 240 void ath9k_led_stop_brightness(struct ath9k_htc_priv *priv) 241 { 242 cancel_delayed_work_sync(&priv->radio_led.brightness_work); 243 cancel_delayed_work_sync(&priv->assoc_led.brightness_work); 244 cancel_delayed_work_sync(&priv->tx_led.brightness_work); 245 cancel_delayed_work_sync(&priv->rx_led.brightness_work); 246 } 247 248 static int ath9k_register_led(struct ath9k_htc_priv *priv, struct ath_led *led, 249 char *trigger) 250 { 251 int ret; 252 253 led->priv = priv; 254 led->led_cdev.name = led->name; 255 led->led_cdev.default_trigger = trigger; 256 led->led_cdev.brightness_set = ath9k_led_brightness; 257 258 ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &led->led_cdev); 259 if (ret) 260 ath_err(ath9k_hw_common(priv->ah), 261 "Failed to register led:%s", led->name); 262 else 263 led->registered = 1; 264 265 INIT_DELAYED_WORK(&led->brightness_work, ath9k_led_brightness_work); 266 267 return ret; 268 } 269 270 static void ath9k_unregister_led(struct ath_led *led) 271 { 272 if (led->registered) { 273 led_classdev_unregister(&led->led_cdev); 274 led->registered = 0; 275 } 276 } 277 278 void ath9k_deinit_leds(struct ath9k_htc_priv *priv) 279 { 280 priv->op_flags |= OP_LED_DEINIT; 281 ath9k_unregister_led(&priv->assoc_led); 282 priv->op_flags &= ~OP_LED_ASSOCIATED; 283 ath9k_unregister_led(&priv->tx_led); 284 ath9k_unregister_led(&priv->rx_led); 285 ath9k_unregister_led(&priv->radio_led); 286 } 287 288 void ath9k_init_leds(struct ath9k_htc_priv *priv) 289 { 290 char *trigger; 291 int ret; 292 293 if (AR_SREV_9287(priv->ah)) 294 priv->ah->led_pin = ATH_LED_PIN_9287; 295 else if (AR_SREV_9271(priv->ah)) 296 priv->ah->led_pin = ATH_LED_PIN_9271; 297 else if (AR_DEVID_7010(priv->ah)) 298 priv->ah->led_pin = ATH_LED_PIN_7010; 299 else 300 priv->ah->led_pin = ATH_LED_PIN_DEF; 301 302 /* Configure gpio 1 for output */ 303 ath9k_hw_cfg_output(priv->ah, priv->ah->led_pin, 304 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 305 /* LED off, active low */ 306 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1); 307 308 INIT_DELAYED_WORK(&priv->ath9k_led_blink_work, ath9k_led_blink_work); 309 310 trigger = ieee80211_get_radio_led_name(priv->hw); 311 snprintf(priv->radio_led.name, sizeof(priv->radio_led.name), 312 "ath9k-%s::radio", wiphy_name(priv->hw->wiphy)); 313 ret = ath9k_register_led(priv, &priv->radio_led, trigger); 314 priv->radio_led.led_type = ATH_LED_RADIO; 315 if (ret) 316 goto fail; 317 318 trigger = ieee80211_get_assoc_led_name(priv->hw); 319 snprintf(priv->assoc_led.name, sizeof(priv->assoc_led.name), 320 "ath9k-%s::assoc", wiphy_name(priv->hw->wiphy)); 321 ret = ath9k_register_led(priv, &priv->assoc_led, trigger); 322 priv->assoc_led.led_type = ATH_LED_ASSOC; 323 if (ret) 324 goto fail; 325 326 trigger = ieee80211_get_tx_led_name(priv->hw); 327 snprintf(priv->tx_led.name, sizeof(priv->tx_led.name), 328 "ath9k-%s::tx", wiphy_name(priv->hw->wiphy)); 329 ret = ath9k_register_led(priv, &priv->tx_led, trigger); 330 priv->tx_led.led_type = ATH_LED_TX; 331 if (ret) 332 goto fail; 333 334 trigger = ieee80211_get_rx_led_name(priv->hw); 335 snprintf(priv->rx_led.name, sizeof(priv->rx_led.name), 336 "ath9k-%s::rx", wiphy_name(priv->hw->wiphy)); 337 ret = ath9k_register_led(priv, &priv->rx_led, trigger); 338 priv->rx_led.led_type = ATH_LED_RX; 339 if (ret) 340 goto fail; 341 342 priv->op_flags &= ~OP_LED_DEINIT; 343 344 return; 345 346 fail: 347 cancel_delayed_work_sync(&priv->ath9k_led_blink_work); 348 ath9k_deinit_leds(priv); 349 } 350 351 /*******************/ 352 /* Rfkill */ 353 /*******************/ 354 355 static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv) 356 { 357 return ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) == 358 priv->ah->rfkill_polarity; 359 } 360 361 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw) 362 { 363 struct ath9k_htc_priv *priv = hw->priv; 364 bool blocked = !!ath_is_rfkill_set(priv); 365 366 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 367 } 368 369 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv) 370 { 371 if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 372 wiphy_rfkill_start_polling(priv->hw->wiphy); 373 } 374 375 void ath9k_htc_radio_enable(struct ieee80211_hw *hw) 376 { 377 struct ath9k_htc_priv *priv = hw->priv; 378 struct ath_hw *ah = priv->ah; 379 struct ath_common *common = ath9k_hw_common(ah); 380 int ret; 381 u8 cmd_rsp; 382 383 if (!ah->curchan) 384 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 385 386 /* Reset the HW */ 387 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 388 if (ret) { 389 ath_err(common, 390 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 391 ret, ah->curchan->channel); 392 } 393 394 ath9k_cmn_update_txpow(ah, priv->curtxpow, priv->txpowlimit, 395 &priv->curtxpow); 396 397 /* Start RX */ 398 WMI_CMD(WMI_START_RECV_CMDID); 399 ath9k_host_rx_init(priv); 400 401 /* Start TX */ 402 htc_start(priv->htc); 403 spin_lock_bh(&priv->tx.tx_lock); 404 priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP; 405 spin_unlock_bh(&priv->tx.tx_lock); 406 ieee80211_wake_queues(hw); 407 408 WMI_CMD(WMI_ENABLE_INTR_CMDID); 409 410 /* Enable LED */ 411 ath9k_hw_cfg_output(ah, ah->led_pin, 412 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 413 ath9k_hw_set_gpio(ah, ah->led_pin, 0); 414 } 415 416 void ath9k_htc_radio_disable(struct ieee80211_hw *hw) 417 { 418 struct ath9k_htc_priv *priv = hw->priv; 419 struct ath_hw *ah = priv->ah; 420 struct ath_common *common = ath9k_hw_common(ah); 421 int ret; 422 u8 cmd_rsp; 423 424 ath9k_htc_ps_wakeup(priv); 425 426 /* Disable LED */ 427 ath9k_hw_set_gpio(ah, ah->led_pin, 1); 428 ath9k_hw_cfg_gpio_input(ah, ah->led_pin); 429 430 WMI_CMD(WMI_DISABLE_INTR_CMDID); 431 432 /* Stop TX */ 433 ieee80211_stop_queues(hw); 434 ath9k_htc_tx_drain(priv); 435 WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID); 436 437 /* Stop RX */ 438 WMI_CMD(WMI_STOP_RECV_CMDID); 439 440 /* Clear the WMI event queue */ 441 ath9k_wmi_event_drain(priv); 442 443 /* 444 * The MIB counters have to be disabled here, 445 * since the target doesn't do it. 446 */ 447 ath9k_hw_disable_mib_counters(ah); 448 449 if (!ah->curchan) 450 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 451 452 /* Reset the HW */ 453 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 454 if (ret) { 455 ath_err(common, 456 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 457 ret, ah->curchan->channel); 458 } 459 460 /* Disable the PHY */ 461 ath9k_hw_phy_disable(ah); 462 463 ath9k_htc_ps_restore(priv); 464 ath9k_htc_setpower(priv, ATH9K_PM_FULL_SLEEP); 465 } 466