1 /* 2 * Copyright (c) 2008-2009 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 "ath9k.h" 18 19 /********************************/ 20 /* LED functions */ 21 /********************************/ 22 23 static void ath_led_blink_work(struct work_struct *work) 24 { 25 struct ath_softc *sc = container_of(work, struct ath_softc, 26 ath_led_blink_work.work); 27 28 if (!(sc->sc_flags & SC_OP_LED_ASSOCIATED)) 29 return; 30 31 if ((sc->led_on_duration == ATH_LED_ON_DURATION_IDLE) || 32 (sc->led_off_duration == ATH_LED_OFF_DURATION_IDLE)) 33 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 0); 34 else 35 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 36 (sc->sc_flags & SC_OP_LED_ON) ? 1 : 0); 37 38 ieee80211_queue_delayed_work(sc->hw, 39 &sc->ath_led_blink_work, 40 (sc->sc_flags & SC_OP_LED_ON) ? 41 msecs_to_jiffies(sc->led_off_duration) : 42 msecs_to_jiffies(sc->led_on_duration)); 43 44 sc->led_on_duration = sc->led_on_cnt ? 45 max((ATH_LED_ON_DURATION_IDLE - sc->led_on_cnt), 25) : 46 ATH_LED_ON_DURATION_IDLE; 47 sc->led_off_duration = sc->led_off_cnt ? 48 max((ATH_LED_OFF_DURATION_IDLE - sc->led_off_cnt), 10) : 49 ATH_LED_OFF_DURATION_IDLE; 50 sc->led_on_cnt = sc->led_off_cnt = 0; 51 if (sc->sc_flags & SC_OP_LED_ON) 52 sc->sc_flags &= ~SC_OP_LED_ON; 53 else 54 sc->sc_flags |= SC_OP_LED_ON; 55 } 56 57 static void ath_led_brightness(struct led_classdev *led_cdev, 58 enum led_brightness brightness) 59 { 60 struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev); 61 struct ath_softc *sc = led->sc; 62 63 switch (brightness) { 64 case LED_OFF: 65 if (led->led_type == ATH_LED_ASSOC || 66 led->led_type == ATH_LED_RADIO) { 67 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 68 (led->led_type == ATH_LED_RADIO)); 69 sc->sc_flags &= ~SC_OP_LED_ASSOCIATED; 70 if (led->led_type == ATH_LED_RADIO) 71 sc->sc_flags &= ~SC_OP_LED_ON; 72 } else { 73 sc->led_off_cnt++; 74 } 75 break; 76 case LED_FULL: 77 if (led->led_type == ATH_LED_ASSOC) { 78 sc->sc_flags |= SC_OP_LED_ASSOCIATED; 79 if (led_blink) 80 ieee80211_queue_delayed_work(sc->hw, 81 &sc->ath_led_blink_work, 0); 82 } else if (led->led_type == ATH_LED_RADIO) { 83 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 0); 84 sc->sc_flags |= SC_OP_LED_ON; 85 } else { 86 sc->led_on_cnt++; 87 } 88 break; 89 default: 90 break; 91 } 92 } 93 94 static int ath_register_led(struct ath_softc *sc, struct ath_led *led, 95 char *trigger) 96 { 97 int ret; 98 99 led->sc = sc; 100 led->led_cdev.name = led->name; 101 led->led_cdev.default_trigger = trigger; 102 led->led_cdev.brightness_set = ath_led_brightness; 103 104 ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev); 105 if (ret) 106 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, 107 "Failed to register led:%s", led->name); 108 else 109 led->registered = 1; 110 return ret; 111 } 112 113 static void ath_unregister_led(struct ath_led *led) 114 { 115 if (led->registered) { 116 led_classdev_unregister(&led->led_cdev); 117 led->registered = 0; 118 } 119 } 120 121 void ath_deinit_leds(struct ath_softc *sc) 122 { 123 ath_unregister_led(&sc->assoc_led); 124 sc->sc_flags &= ~SC_OP_LED_ASSOCIATED; 125 ath_unregister_led(&sc->tx_led); 126 ath_unregister_led(&sc->rx_led); 127 ath_unregister_led(&sc->radio_led); 128 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1); 129 } 130 131 void ath_init_leds(struct ath_softc *sc) 132 { 133 char *trigger; 134 int ret; 135 136 if (AR_SREV_9287(sc->sc_ah)) 137 sc->sc_ah->led_pin = ATH_LED_PIN_9287; 138 else 139 sc->sc_ah->led_pin = ATH_LED_PIN_DEF; 140 141 /* Configure gpio 1 for output */ 142 ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin, 143 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 144 /* LED off, active low */ 145 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1); 146 147 if (led_blink) 148 INIT_DELAYED_WORK(&sc->ath_led_blink_work, ath_led_blink_work); 149 150 trigger = ieee80211_get_radio_led_name(sc->hw); 151 snprintf(sc->radio_led.name, sizeof(sc->radio_led.name), 152 "ath9k-%s::radio", wiphy_name(sc->hw->wiphy)); 153 ret = ath_register_led(sc, &sc->radio_led, trigger); 154 sc->radio_led.led_type = ATH_LED_RADIO; 155 if (ret) 156 goto fail; 157 158 trigger = ieee80211_get_assoc_led_name(sc->hw); 159 snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name), 160 "ath9k-%s::assoc", wiphy_name(sc->hw->wiphy)); 161 ret = ath_register_led(sc, &sc->assoc_led, trigger); 162 sc->assoc_led.led_type = ATH_LED_ASSOC; 163 if (ret) 164 goto fail; 165 166 trigger = ieee80211_get_tx_led_name(sc->hw); 167 snprintf(sc->tx_led.name, sizeof(sc->tx_led.name), 168 "ath9k-%s::tx", wiphy_name(sc->hw->wiphy)); 169 ret = ath_register_led(sc, &sc->tx_led, trigger); 170 sc->tx_led.led_type = ATH_LED_TX; 171 if (ret) 172 goto fail; 173 174 trigger = ieee80211_get_rx_led_name(sc->hw); 175 snprintf(sc->rx_led.name, sizeof(sc->rx_led.name), 176 "ath9k-%s::rx", wiphy_name(sc->hw->wiphy)); 177 ret = ath_register_led(sc, &sc->rx_led, trigger); 178 sc->rx_led.led_type = ATH_LED_RX; 179 if (ret) 180 goto fail; 181 182 return; 183 184 fail: 185 if (led_blink) 186 cancel_delayed_work_sync(&sc->ath_led_blink_work); 187 ath_deinit_leds(sc); 188 } 189 190 /*******************/ 191 /* Rfkill */ 192 /*******************/ 193 194 static bool ath_is_rfkill_set(struct ath_softc *sc) 195 { 196 struct ath_hw *ah = sc->sc_ah; 197 198 return ath9k_hw_gpio_get(ah, ah->rfkill_gpio) == 199 ah->rfkill_polarity; 200 } 201 202 void ath9k_rfkill_poll_state(struct ieee80211_hw *hw) 203 { 204 struct ath_wiphy *aphy = hw->priv; 205 struct ath_softc *sc = aphy->sc; 206 bool blocked = !!ath_is_rfkill_set(sc); 207 208 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 209 } 210 211 void ath_start_rfkill_poll(struct ath_softc *sc) 212 { 213 struct ath_hw *ah = sc->sc_ah; 214 215 if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 216 wiphy_rfkill_start_polling(sc->hw->wiphy); 217 } 218 219 /******************/ 220 /* BTCOEX */ 221 /******************/ 222 223 /* 224 * Detects if there is any priority bt traffic 225 */ 226 static void ath_detect_bt_priority(struct ath_softc *sc) 227 { 228 struct ath_btcoex *btcoex = &sc->btcoex; 229 struct ath_hw *ah = sc->sc_ah; 230 231 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio)) 232 btcoex->bt_priority_cnt++; 233 234 if (time_after(jiffies, btcoex->bt_priority_time + 235 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { 236 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 237 /* Detect if colocated bt started scanning */ 238 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 239 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX, 240 "BT scan detected"); 241 sc->sc_flags |= (SC_OP_BT_SCAN | 242 SC_OP_BT_PRIORITY_DETECTED); 243 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 244 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX, 245 "BT priority traffic detected"); 246 sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED; 247 } 248 249 btcoex->bt_priority_cnt = 0; 250 btcoex->bt_priority_time = jiffies; 251 } 252 } 253 254 /* 255 * Configures appropriate weight based on stomp type. 256 */ 257 static void ath9k_btcoex_bt_stomp(struct ath_softc *sc, 258 enum ath_stomp_type stomp_type) 259 { 260 struct ath_hw *ah = sc->sc_ah; 261 262 switch (stomp_type) { 263 case ATH_BTCOEX_STOMP_ALL: 264 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 265 AR_STOMP_ALL_WLAN_WGHT); 266 break; 267 case ATH_BTCOEX_STOMP_LOW: 268 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 269 AR_STOMP_LOW_WLAN_WGHT); 270 break; 271 case ATH_BTCOEX_STOMP_NONE: 272 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 273 AR_STOMP_NONE_WLAN_WGHT); 274 break; 275 default: 276 ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX, 277 "Invalid Stomptype\n"); 278 break; 279 } 280 281 ath9k_hw_btcoex_enable(ah); 282 } 283 284 static void ath9k_gen_timer_start(struct ath_hw *ah, 285 struct ath_gen_timer *timer, 286 u32 timer_next, 287 u32 timer_period) 288 { 289 ath9k_hw_gen_timer_start(ah, timer, timer_next, timer_period); 290 291 if ((ah->imask & ATH9K_INT_GENTIMER) == 0) { 292 ath9k_hw_set_interrupts(ah, 0); 293 ah->imask |= ATH9K_INT_GENTIMER; 294 ath9k_hw_set_interrupts(ah, ah->imask); 295 } 296 } 297 298 static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer) 299 { 300 struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers; 301 302 ath9k_hw_gen_timer_stop(ah, timer); 303 304 /* if no timer is enabled, turn off interrupt mask */ 305 if (timer_table->timer_mask.val == 0) { 306 ath9k_hw_set_interrupts(ah, 0); 307 ah->imask &= ~ATH9K_INT_GENTIMER; 308 ath9k_hw_set_interrupts(ah, ah->imask); 309 } 310 } 311 312 /* 313 * This is the master bt coex timer which runs for every 314 * 45ms, bt traffic will be given priority during 55% of this 315 * period while wlan gets remaining 45% 316 */ 317 static void ath_btcoex_period_timer(unsigned long data) 318 { 319 struct ath_softc *sc = (struct ath_softc *) data; 320 struct ath_hw *ah = sc->sc_ah; 321 struct ath_btcoex *btcoex = &sc->btcoex; 322 u32 timer_period; 323 bool is_btscan; 324 325 ath_detect_bt_priority(sc); 326 327 is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 328 329 spin_lock_bh(&btcoex->btcoex_lock); 330 331 ath9k_btcoex_bt_stomp(sc, is_btscan ? ATH_BTCOEX_STOMP_ALL : 332 btcoex->bt_stomp_type); 333 334 spin_unlock_bh(&btcoex->btcoex_lock); 335 336 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) { 337 if (btcoex->hw_timer_enabled) 338 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 339 340 timer_period = is_btscan ? btcoex->btscan_no_stomp : 341 btcoex->btcoex_no_stomp; 342 ath9k_gen_timer_start(ah, 343 btcoex->no_stomp_timer, 344 (ath9k_hw_gettsf32(ah) + 345 timer_period), timer_period * 10); 346 btcoex->hw_timer_enabled = true; 347 } 348 349 mod_timer(&btcoex->period_timer, jiffies + 350 msecs_to_jiffies(ATH_BTCOEX_DEF_BT_PERIOD)); 351 } 352 353 /* 354 * Generic tsf based hw timer which configures weight 355 * registers to time slice between wlan and bt traffic 356 */ 357 static void ath_btcoex_no_stomp_timer(void *arg) 358 { 359 struct ath_softc *sc = (struct ath_softc *)arg; 360 struct ath_hw *ah = sc->sc_ah; 361 struct ath_btcoex *btcoex = &sc->btcoex; 362 bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 363 364 ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX, 365 "no stomp timer running\n"); 366 367 spin_lock_bh(&btcoex->btcoex_lock); 368 369 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) 370 ath9k_btcoex_bt_stomp(sc, ATH_BTCOEX_STOMP_NONE); 371 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 372 ath9k_btcoex_bt_stomp(sc, ATH_BTCOEX_STOMP_LOW); 373 374 spin_unlock_bh(&btcoex->btcoex_lock); 375 } 376 377 int ath_init_btcoex_timer(struct ath_softc *sc) 378 { 379 struct ath_btcoex *btcoex = &sc->btcoex; 380 381 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000; 382 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 383 btcoex->btcoex_period / 100; 384 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 385 btcoex->btcoex_period / 100; 386 387 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer, 388 (unsigned long) sc); 389 390 spin_lock_init(&btcoex->btcoex_lock); 391 392 btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah, 393 ath_btcoex_no_stomp_timer, 394 ath_btcoex_no_stomp_timer, 395 (void *) sc, AR_FIRST_NDP_TIMER); 396 397 if (!btcoex->no_stomp_timer) 398 return -ENOMEM; 399 400 return 0; 401 } 402 403 /* 404 * (Re)start btcoex timers 405 */ 406 void ath9k_btcoex_timer_resume(struct ath_softc *sc) 407 { 408 struct ath_btcoex *btcoex = &sc->btcoex; 409 struct ath_hw *ah = sc->sc_ah; 410 411 ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX, 412 "Starting btcoex timers"); 413 414 /* make sure duty cycle timer is also stopped when resuming */ 415 if (btcoex->hw_timer_enabled) 416 ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer); 417 418 btcoex->bt_priority_cnt = 0; 419 btcoex->bt_priority_time = jiffies; 420 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 421 422 mod_timer(&btcoex->period_timer, jiffies); 423 } 424 425 426 /* 427 * Pause btcoex timer and bt duty cycle timer 428 */ 429 void ath9k_btcoex_timer_pause(struct ath_softc *sc) 430 { 431 struct ath_btcoex *btcoex = &sc->btcoex; 432 struct ath_hw *ah = sc->sc_ah; 433 434 del_timer_sync(&btcoex->period_timer); 435 436 if (btcoex->hw_timer_enabled) 437 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 438 439 btcoex->hw_timer_enabled = false; 440 } 441