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