1 /* 2 * Copyright (c) 2008-2011 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 "ath9k.h" 18 19 /********************************/ 20 /* LED functions */ 21 /********************************/ 22 23 #ifdef CONFIG_MAC80211_LEDS 24 static void ath_led_brightness(struct led_classdev *led_cdev, 25 enum led_brightness brightness) 26 { 27 struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev); 28 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF)); 29 } 30 31 void ath_deinit_leds(struct ath_softc *sc) 32 { 33 if (!sc->led_registered) 34 return; 35 36 ath_led_brightness(&sc->led_cdev, LED_OFF); 37 led_classdev_unregister(&sc->led_cdev); 38 } 39 40 void ath_init_leds(struct ath_softc *sc) 41 { 42 int ret; 43 44 if (AR_SREV_9100(sc->sc_ah)) 45 return; 46 47 if (!led_blink) 48 sc->led_cdev.default_trigger = 49 ieee80211_get_radio_led_name(sc->hw); 50 51 snprintf(sc->led_name, sizeof(sc->led_name), 52 "ath9k-%s", wiphy_name(sc->hw->wiphy)); 53 sc->led_cdev.name = sc->led_name; 54 sc->led_cdev.brightness_set = ath_led_brightness; 55 56 ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev); 57 if (ret < 0) 58 return; 59 60 sc->led_registered = true; 61 } 62 63 void ath_fill_led_pin(struct ath_softc *sc) 64 { 65 struct ath_hw *ah = sc->sc_ah; 66 67 if (AR_SREV_9100(ah) || (ah->led_pin >= 0)) 68 return; 69 70 if (AR_SREV_9287(ah)) 71 ah->led_pin = ATH_LED_PIN_9287; 72 else if (AR_SREV_9485(sc->sc_ah)) 73 ah->led_pin = ATH_LED_PIN_9485; 74 else if (AR_SREV_9300(sc->sc_ah)) 75 ah->led_pin = ATH_LED_PIN_9300; 76 else if (AR_SREV_9462(sc->sc_ah) || AR_SREV_9565(sc->sc_ah)) 77 ah->led_pin = ATH_LED_PIN_9462; 78 else 79 ah->led_pin = ATH_LED_PIN_DEF; 80 81 /* Configure gpio 1 for output */ 82 ath9k_hw_cfg_output(ah, ah->led_pin, AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 83 84 /* LED off, active low */ 85 ath9k_hw_set_gpio(ah, ah->led_pin, 1); 86 } 87 #endif 88 89 /*******************/ 90 /* Rfkill */ 91 /*******************/ 92 93 static bool ath_is_rfkill_set(struct ath_softc *sc) 94 { 95 struct ath_hw *ah = sc->sc_ah; 96 bool is_blocked; 97 98 ath9k_ps_wakeup(sc); 99 is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) == 100 ah->rfkill_polarity; 101 ath9k_ps_restore(sc); 102 103 return is_blocked; 104 } 105 106 void ath9k_rfkill_poll_state(struct ieee80211_hw *hw) 107 { 108 struct ath_softc *sc = hw->priv; 109 bool blocked = !!ath_is_rfkill_set(sc); 110 111 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 112 } 113 114 void ath_start_rfkill_poll(struct ath_softc *sc) 115 { 116 struct ath_hw *ah = sc->sc_ah; 117 118 if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 119 wiphy_rfkill_start_polling(sc->hw->wiphy); 120 } 121 122 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT 123 124 /******************/ 125 /* BTCOEX */ 126 /******************/ 127 128 /* 129 * Detects if there is any priority bt traffic 130 */ 131 static void ath_detect_bt_priority(struct ath_softc *sc) 132 { 133 struct ath_btcoex *btcoex = &sc->btcoex; 134 struct ath_hw *ah = sc->sc_ah; 135 136 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio)) 137 btcoex->bt_priority_cnt++; 138 139 if (time_after(jiffies, btcoex->bt_priority_time + 140 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { 141 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 142 clear_bit(BT_OP_SCAN, &btcoex->op_flags); 143 /* Detect if colocated bt started scanning */ 144 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 145 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 146 "BT scan detected\n"); 147 set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 148 set_bit(BT_OP_SCAN, &btcoex->op_flags); 149 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 150 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 151 "BT priority traffic detected\n"); 152 set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 153 } 154 155 btcoex->bt_priority_cnt = 0; 156 btcoex->bt_priority_time = jiffies; 157 } 158 } 159 160 static void ath9k_gen_timer_start(struct ath_hw *ah, 161 struct ath_gen_timer *timer, 162 u32 trig_timeout, 163 u32 timer_period) 164 { 165 ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period); 166 167 if ((ah->imask & ATH9K_INT_GENTIMER) == 0) { 168 ath9k_hw_disable_interrupts(ah); 169 ah->imask |= ATH9K_INT_GENTIMER; 170 ath9k_hw_set_interrupts(ah); 171 ath9k_hw_enable_interrupts(ah); 172 } 173 } 174 175 static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer) 176 { 177 struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers; 178 179 ath9k_hw_gen_timer_stop(ah, timer); 180 181 /* if no timer is enabled, turn off interrupt mask */ 182 if (timer_table->timer_mask.val == 0) { 183 ath9k_hw_disable_interrupts(ah); 184 ah->imask &= ~ATH9K_INT_GENTIMER; 185 ath9k_hw_set_interrupts(ah); 186 ath9k_hw_enable_interrupts(ah); 187 } 188 } 189 190 /* 191 * This is the master bt coex timer which runs for every 192 * 45ms, bt traffic will be given priority during 55% of this 193 * period while wlan gets remaining 45% 194 */ 195 static void ath_btcoex_period_timer(unsigned long data) 196 { 197 struct ath_softc *sc = (struct ath_softc *) data; 198 struct ath_hw *ah = sc->sc_ah; 199 struct ath_btcoex *btcoex = &sc->btcoex; 200 struct ath_mci_profile *mci = &btcoex->mci; 201 u32 timer_period; 202 bool is_btscan; 203 unsigned long flags; 204 205 spin_lock_irqsave(&sc->sc_pm_lock, flags); 206 if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) { 207 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 208 goto skip_hw_wakeup; 209 } 210 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 211 212 ath9k_ps_wakeup(sc); 213 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 214 ath_detect_bt_priority(sc); 215 is_btscan = test_bit(BT_OP_SCAN, &btcoex->op_flags); 216 217 btcoex->bt_wait_time += btcoex->btcoex_period; 218 if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) { 219 if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) && 220 (mci->num_pan || mci->num_other_acl)) 221 ah->btcoex_hw.mci.stomp_ftp = 222 (sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH); 223 else 224 ah->btcoex_hw.mci.stomp_ftp = false; 225 btcoex->bt_wait_time = 0; 226 sc->rx.num_pkts = 0; 227 } 228 229 spin_lock_bh(&btcoex->btcoex_lock); 230 231 ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL : 232 btcoex->bt_stomp_type); 233 234 ath9k_hw_btcoex_enable(ah); 235 spin_unlock_bh(&btcoex->btcoex_lock); 236 237 /* 238 * btcoex_period is in msec while (btocex/btscan_)no_stomp are in usec, 239 * ensure that we properly convert btcoex_period to usec 240 * for any comparision with (btcoex/btscan_)no_stomp. 241 */ 242 if (btcoex->btcoex_period * 1000 != btcoex->btcoex_no_stomp) { 243 if (btcoex->hw_timer_enabled) 244 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 245 246 timer_period = is_btscan ? btcoex->btscan_no_stomp : 247 btcoex->btcoex_no_stomp; 248 ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period, 249 timer_period * 10); 250 btcoex->hw_timer_enabled = true; 251 } 252 253 ath9k_ps_restore(sc); 254 skip_hw_wakeup: 255 timer_period = btcoex->btcoex_period; 256 mod_timer(&btcoex->period_timer, jiffies + msecs_to_jiffies(timer_period)); 257 } 258 259 /* 260 * Generic tsf based hw timer which configures weight 261 * registers to time slice between wlan and bt traffic 262 */ 263 static void ath_btcoex_no_stomp_timer(void *arg) 264 { 265 struct ath_softc *sc = (struct ath_softc *)arg; 266 struct ath_hw *ah = sc->sc_ah; 267 struct ath_btcoex *btcoex = &sc->btcoex; 268 struct ath_common *common = ath9k_hw_common(ah); 269 270 ath_dbg(common, BTCOEX, "no stomp timer running\n"); 271 272 ath9k_ps_wakeup(sc); 273 spin_lock_bh(&btcoex->btcoex_lock); 274 275 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || 276 test_bit(BT_OP_SCAN, &btcoex->op_flags)) 277 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 278 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 279 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); 280 281 ath9k_hw_btcoex_enable(ah); 282 spin_unlock_bh(&btcoex->btcoex_lock); 283 ath9k_ps_restore(sc); 284 } 285 286 static int ath_init_btcoex_timer(struct ath_softc *sc) 287 { 288 struct ath_btcoex *btcoex = &sc->btcoex; 289 290 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; 291 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 1000 * 292 btcoex->btcoex_period / 100; 293 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 1000 * 294 btcoex->btcoex_period / 100; 295 296 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer, 297 (unsigned long) sc); 298 299 spin_lock_init(&btcoex->btcoex_lock); 300 301 btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah, 302 ath_btcoex_no_stomp_timer, 303 ath_btcoex_no_stomp_timer, 304 (void *) sc, AR_FIRST_NDP_TIMER); 305 306 if (!btcoex->no_stomp_timer) 307 return -ENOMEM; 308 309 return 0; 310 } 311 312 /* 313 * (Re)start btcoex timers 314 */ 315 void ath9k_btcoex_timer_resume(struct ath_softc *sc) 316 { 317 struct ath_btcoex *btcoex = &sc->btcoex; 318 struct ath_hw *ah = sc->sc_ah; 319 320 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n"); 321 322 /* make sure duty cycle timer is also stopped when resuming */ 323 if (btcoex->hw_timer_enabled) { 324 ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer); 325 btcoex->hw_timer_enabled = false; 326 } 327 328 btcoex->bt_priority_cnt = 0; 329 btcoex->bt_priority_time = jiffies; 330 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 331 clear_bit(BT_OP_SCAN, &btcoex->op_flags); 332 333 mod_timer(&btcoex->period_timer, jiffies); 334 } 335 336 337 /* 338 * Pause btcoex timer and bt duty cycle timer 339 */ 340 void ath9k_btcoex_timer_pause(struct ath_softc *sc) 341 { 342 struct ath_btcoex *btcoex = &sc->btcoex; 343 struct ath_hw *ah = sc->sc_ah; 344 345 del_timer_sync(&btcoex->period_timer); 346 347 if (btcoex->hw_timer_enabled) { 348 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 349 btcoex->hw_timer_enabled = false; 350 } 351 } 352 353 void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc) 354 { 355 struct ath_btcoex *btcoex = &sc->btcoex; 356 357 if (btcoex->hw_timer_enabled) { 358 ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer); 359 btcoex->hw_timer_enabled = false; 360 } 361 } 362 363 u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen) 364 { 365 struct ath_btcoex *btcoex = &sc->btcoex; 366 struct ath_mci_profile *mci = &sc->btcoex.mci; 367 u16 aggr_limit = 0; 368 369 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit) 370 aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4; 371 else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags)) 372 aggr_limit = min((max_4ms_framelen * 3) / 8, 373 (u32)ATH_AMPDU_LIMIT_MAX); 374 375 return aggr_limit; 376 } 377 378 void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status) 379 { 380 struct ath_hw *ah = sc->sc_ah; 381 382 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 383 if (status & ATH9K_INT_GENTIMER) 384 ath_gen_timer_isr(sc->sc_ah); 385 386 if (status & ATH9K_INT_MCI) 387 ath_mci_intr(sc); 388 } 389 390 void ath9k_start_btcoex(struct ath_softc *sc) 391 { 392 struct ath_hw *ah = sc->sc_ah; 393 394 if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) && 395 !ah->btcoex_hw.enabled) { 396 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 397 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 398 AR_STOMP_LOW_WLAN_WGHT, 0); 399 else 400 ath9k_hw_btcoex_set_weight(ah, 0, 0, 401 ATH_BTCOEX_STOMP_NONE); 402 ath9k_hw_btcoex_enable(ah); 403 404 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 405 ath9k_btcoex_timer_resume(sc); 406 } 407 } 408 409 void ath9k_stop_btcoex(struct ath_softc *sc) 410 { 411 struct ath_hw *ah = sc->sc_ah; 412 413 if (ah->btcoex_hw.enabled && 414 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) { 415 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 416 ath9k_btcoex_timer_pause(sc); 417 ath9k_hw_btcoex_disable(ah); 418 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) 419 ath_mci_flush_profile(&sc->btcoex.mci); 420 } 421 } 422 423 void ath9k_deinit_btcoex(struct ath_softc *sc) 424 { 425 struct ath_hw *ah = sc->sc_ah; 426 427 if ((sc->btcoex.no_stomp_timer) && 428 ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_3WIRE) 429 ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer); 430 431 if (ath9k_hw_mci_is_enabled(ah)) 432 ath_mci_cleanup(sc); 433 } 434 435 int ath9k_init_btcoex(struct ath_softc *sc) 436 { 437 struct ath_txq *txq; 438 struct ath_hw *ah = sc->sc_ah; 439 int r; 440 441 ath9k_hw_btcoex_init_scheme(ah); 442 443 switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) { 444 case ATH_BTCOEX_CFG_NONE: 445 break; 446 case ATH_BTCOEX_CFG_2WIRE: 447 ath9k_hw_btcoex_init_2wire(sc->sc_ah); 448 break; 449 case ATH_BTCOEX_CFG_3WIRE: 450 ath9k_hw_btcoex_init_3wire(sc->sc_ah); 451 r = ath_init_btcoex_timer(sc); 452 if (r) 453 return -1; 454 txq = sc->tx.txq_map[WME_AC_BE]; 455 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum); 456 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW; 457 if (ath9k_hw_mci_is_enabled(ah)) { 458 sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE; 459 INIT_LIST_HEAD(&sc->btcoex.mci.info); 460 461 r = ath_mci_setup(sc); 462 if (r) 463 return r; 464 465 ath9k_hw_btcoex_init_mci(ah); 466 } 467 468 break; 469 default: 470 WARN_ON(1); 471 break; 472 } 473 474 return 0; 475 } 476 477 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */ 478