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 25static void ath_fill_led_pin(struct ath_softc *sc) 26{ 27 struct ath_hw *ah = sc->sc_ah; 28 29 /* Set default led pin if invalid */ 30 if (ah->led_pin < 0) { 31 if (AR_SREV_9287(ah)) 32 ah->led_pin = ATH_LED_PIN_9287; 33 else if (AR_SREV_9485(ah)) 34 ah->led_pin = ATH_LED_PIN_9485; 35 else if (AR_SREV_9300(ah)) 36 ah->led_pin = ATH_LED_PIN_9300; 37 else if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) 38 ah->led_pin = ATH_LED_PIN_9462; 39 else 40 ah->led_pin = ATH_LED_PIN_DEF; 41 } 42 43 /* Configure gpio for output */ 44 ath9k_hw_gpio_request_out(ah, ah->led_pin, "ath9k-led", 45 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 46 47 /* LED off, active low */ 48 ath9k_hw_set_gpio(ah, ah->led_pin, ah->config.led_active_high ? 0 : 1); 49} 50 51static void ath_led_brightness(struct led_classdev *led_cdev, 52 enum led_brightness brightness) 53{ 54 struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev); 55 u32 val = (brightness == LED_OFF); 56 57 if (sc->sc_ah->config.led_active_high) 58 val = !val; 59 60 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, val); 61} 62 63void ath_deinit_leds(struct ath_softc *sc) 64{ 65 if (!sc->led_registered) 66 return; 67 68 ath_led_brightness(&sc->led_cdev, LED_OFF); 69 led_classdev_unregister(&sc->led_cdev); 70 71 ath9k_hw_gpio_free(sc->sc_ah, sc->sc_ah->led_pin); 72} 73 74void ath_init_leds(struct ath_softc *sc) 75{ 76 int ret; 77 78 if (AR_SREV_9100(sc->sc_ah)) 79 return; 80 81 ath_fill_led_pin(sc); 82 83 if (!ath9k_led_blink) 84 sc->led_cdev.default_trigger = 85 ieee80211_get_radio_led_name(sc->hw); 86 87 snprintf(sc->led_name, sizeof(sc->led_name), 88 "ath9k-%s", wiphy_name(sc->hw->wiphy)); 89 sc->led_cdev.name = sc->led_name; 90 sc->led_cdev.brightness_set = ath_led_brightness; 91 92 ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev); 93 if (ret < 0) 94 return; 95 96 sc->led_registered = true; 97} 98#endif 99 100/*******************/ 101/* Rfkill */ 102/*******************/ 103 104static bool ath_is_rfkill_set(struct ath_softc *sc) 105{ 106 struct ath_hw *ah = sc->sc_ah; 107 bool is_blocked; 108 109 ath9k_ps_wakeup(sc); 110 is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) == 111 ah->rfkill_polarity; 112 ath9k_ps_restore(sc); 113 114 return is_blocked; 115} 116 117void ath9k_rfkill_poll_state(struct ieee80211_hw *hw) 118{ 119 struct ath_softc *sc = hw->priv; 120 bool blocked = !!ath_is_rfkill_set(sc); 121 122 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 123} 124 125void ath_start_rfkill_poll(struct ath_softc *sc) 126{ 127 struct ath_hw *ah = sc->sc_ah; 128 129 if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 130 wiphy_rfkill_start_polling(sc->hw->wiphy); 131} 132 133#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT 134 135/******************/ 136/* BTCOEX */ 137/******************/ 138 139/* 140 * Detects if there is any priority bt traffic 141 */ 142static void ath_detect_bt_priority(struct ath_softc *sc) 143{ 144 struct ath_btcoex *btcoex = &sc->btcoex; 145 struct ath_hw *ah = sc->sc_ah; 146 147 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio)) 148 btcoex->bt_priority_cnt++; 149 150 if (time_after(jiffies, btcoex->bt_priority_time + 151 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { 152 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 153 clear_bit(BT_OP_SCAN, &btcoex->op_flags); 154 /* Detect if colocated bt started scanning */ 155 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 156 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 157 "BT scan detected\n"); 158 set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 159 set_bit(BT_OP_SCAN, &btcoex->op_flags); 160 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 161 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 162 "BT priority traffic detected\n"); 163 set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 164 } 165 166 btcoex->bt_priority_cnt = 0; 167 btcoex->bt_priority_time = jiffies; 168 } 169} 170 171static void ath_mci_ftp_adjust(struct ath_softc *sc) 172{ 173 struct ath_btcoex *btcoex = &sc->btcoex; 174 struct ath_mci_profile *mci = &btcoex->mci; 175 struct ath_hw *ah = sc->sc_ah; 176 177 if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) { 178 if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) && 179 (mci->num_pan || mci->num_other_acl)) 180 ah->btcoex_hw.mci.stomp_ftp = 181 (sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH); 182 else 183 ah->btcoex_hw.mci.stomp_ftp = false; 184 btcoex->bt_wait_time = 0; 185 sc->rx.num_pkts = 0; 186 } 187} 188 189/* 190 * This is the master bt coex timer which runs for every 191 * 45ms, bt traffic will be given priority during 55% of this 192 * period while wlan gets remaining 45% 193 */ 194static void ath_btcoex_period_timer(struct timer_list *t) 195{ 196 struct ath_softc *sc = from_timer(sc, t, btcoex.period_timer); 197 struct ath_hw *ah = sc->sc_ah; 198 struct ath_btcoex *btcoex = &sc->btcoex; 199 enum ath_stomp_type stomp_type; 200 u32 timer_period; 201 unsigned long flags; 202 203 spin_lock_irqsave(&sc->sc_pm_lock, flags); 204 if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) { 205 btcoex->bt_wait_time += btcoex->btcoex_period; 206 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 207 goto skip_hw_wakeup; 208 } 209 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 210 211 ath9k_ps_wakeup(sc); 212 spin_lock_bh(&btcoex->btcoex_lock); 213 214 if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) { 215 ath9k_mci_update_rssi(sc); 216 ath_mci_ftp_adjust(sc); 217 } 218 219 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 220 ath_detect_bt_priority(sc); 221 222 stomp_type = btcoex->bt_stomp_type; 223 timer_period = btcoex->btcoex_no_stomp; 224 225 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) { 226 if (test_bit(BT_OP_SCAN, &btcoex->op_flags)) { 227 stomp_type = ATH_BTCOEX_STOMP_ALL; 228 timer_period = btcoex->btscan_no_stomp; 229 } 230 } else if (btcoex->stomp_audio >= 5) { 231 stomp_type = ATH_BTCOEX_STOMP_AUDIO; 232 btcoex->stomp_audio = 0; 233 } 234 235 ath9k_hw_btcoex_bt_stomp(ah, stomp_type); 236 ath9k_hw_btcoex_enable(ah); 237 238 spin_unlock_bh(&btcoex->btcoex_lock); 239 240 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) 241 mod_timer(&btcoex->no_stomp_timer, 242 jiffies + msecs_to_jiffies(timer_period)); 243 244 ath9k_ps_restore(sc); 245 246skip_hw_wakeup: 247 mod_timer(&btcoex->period_timer, 248 jiffies + msecs_to_jiffies(btcoex->btcoex_period)); 249} 250 251/* 252 * Generic tsf based hw timer which configures weight 253 * registers to time slice between wlan and bt traffic 254 */ 255static void ath_btcoex_no_stomp_timer(struct timer_list *t) 256{ 257 struct ath_softc *sc = from_timer(sc, t, btcoex.no_stomp_timer); 258 struct ath_hw *ah = sc->sc_ah; 259 struct ath_btcoex *btcoex = &sc->btcoex; 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 (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && 266 test_bit(BT_OP_SCAN, &btcoex->op_flags))) 267 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 268 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 269 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); 270 271 ath9k_hw_btcoex_enable(ah); 272 spin_unlock_bh(&btcoex->btcoex_lock); 273 ath9k_ps_restore(sc); 274} 275 276static void ath_init_btcoex_timer(struct ath_softc *sc) 277{ 278 struct ath_btcoex *btcoex = &sc->btcoex; 279 280 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; 281 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 282 btcoex->btcoex_period / 100; 283 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 284 btcoex->btcoex_period / 100; 285 btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW; 286 287 timer_setup(&btcoex->period_timer, ath_btcoex_period_timer, 0); 288 timer_setup(&btcoex->no_stomp_timer, ath_btcoex_no_stomp_timer, 0); 289 290 spin_lock_init(&btcoex->btcoex_lock); 291} 292 293/* 294 * (Re)start btcoex timers 295 */ 296void ath9k_btcoex_timer_resume(struct ath_softc *sc) 297{ 298 struct ath_btcoex *btcoex = &sc->btcoex; 299 struct ath_hw *ah = sc->sc_ah; 300 301 if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_3WIRE && 302 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI) 303 return; 304 305 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n"); 306 307 /* make sure duty cycle timer is also stopped when resuming */ 308 del_timer_sync(&btcoex->no_stomp_timer); 309 310 btcoex->bt_priority_cnt = 0; 311 btcoex->bt_priority_time = jiffies; 312 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 313 clear_bit(BT_OP_SCAN, &btcoex->op_flags); 314 315 mod_timer(&btcoex->period_timer, jiffies); 316} 317 318/* 319 * Pause btcoex timer and bt duty cycle timer 320 */ 321void ath9k_btcoex_timer_pause(struct ath_softc *sc) 322{ 323 struct ath_btcoex *btcoex = &sc->btcoex; 324 struct ath_hw *ah = sc->sc_ah; 325 326 if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_3WIRE && 327 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI) 328 return; 329 330 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Stopping btcoex timers\n"); 331 332 del_timer_sync(&btcoex->period_timer); 333 del_timer_sync(&btcoex->no_stomp_timer); 334} 335 336void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc) 337{ 338 struct ath_btcoex *btcoex = &sc->btcoex; 339 340 del_timer_sync(&btcoex->no_stomp_timer); 341} 342 343u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen) 344{ 345 struct ath_btcoex *btcoex = &sc->btcoex; 346 struct ath_mci_profile *mci = &sc->btcoex.mci; 347 u16 aggr_limit = 0; 348 349 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit) 350 aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4; 351 else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags)) 352 aggr_limit = min((max_4ms_framelen * 3) / 8, 353 (u32)ATH_AMPDU_LIMIT_MAX); 354 355 return aggr_limit; 356} 357 358void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status) 359{ 360 if (status & ATH9K_INT_MCI) 361 ath_mci_intr(sc); 362} 363 364void ath9k_start_btcoex(struct ath_softc *sc) 365{ 366 struct ath_hw *ah = sc->sc_ah; 367 368 if (ah->btcoex_hw.enabled || 369 ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE) 370 return; 371 372 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 373 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 374 AR_STOMP_LOW_WLAN_WGHT, 0); 375 else 376 ath9k_hw_btcoex_set_weight(ah, 0, 0, 377 ATH_BTCOEX_STOMP_NONE); 378 ath9k_hw_btcoex_enable(ah); 379 ath9k_btcoex_timer_resume(sc); 380} 381 382void ath9k_stop_btcoex(struct ath_softc *sc) 383{ 384 struct ath_hw *ah = sc->sc_ah; 385 386 if (!ah->btcoex_hw.enabled || 387 ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE) 388 return; 389 390 ath9k_btcoex_timer_pause(sc); 391 ath9k_hw_btcoex_disable(ah); 392 393 if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) 394 ath_mci_flush_profile(&sc->btcoex.mci); 395} 396 397void ath9k_deinit_btcoex(struct ath_softc *sc) 398{ 399 struct ath_hw *ah = sc->sc_ah; 400 401 if (ath9k_hw_mci_is_enabled(ah)) 402 ath_mci_cleanup(sc); 403 else { 404 enum ath_btcoex_scheme scheme = ath9k_hw_get_btcoex_scheme(ah); 405 406 if (scheme == ATH_BTCOEX_CFG_2WIRE || 407 scheme == ATH_BTCOEX_CFG_3WIRE) 408 ath9k_hw_btcoex_deinit(sc->sc_ah); 409 } 410} 411 412int ath9k_init_btcoex(struct ath_softc *sc) 413{ 414 struct ath_txq *txq; 415 struct ath_hw *ah = sc->sc_ah; 416 int r; 417 418 ath9k_hw_btcoex_init_scheme(ah); 419 420 switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) { 421 case ATH_BTCOEX_CFG_NONE: 422 break; 423 case ATH_BTCOEX_CFG_2WIRE: 424 ath9k_hw_btcoex_init_2wire(sc->sc_ah); 425 break; 426 case ATH_BTCOEX_CFG_3WIRE: 427 ath9k_hw_btcoex_init_3wire(sc->sc_ah); 428 ath_init_btcoex_timer(sc); 429 txq = sc->tx.txq_map[IEEE80211_AC_BE]; 430 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum); 431 break; 432 case ATH_BTCOEX_CFG_MCI: 433 ath_init_btcoex_timer(sc); 434 435 sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE; 436 INIT_LIST_HEAD(&sc->btcoex.mci.info); 437 ath9k_hw_btcoex_init_mci(ah); 438 439 r = ath_mci_setup(sc); 440 if (r) 441 return r; 442 443 break; 444 default: 445 WARN_ON(1); 446 break; 447 } 448 449 return 0; 450} 451 452static int ath9k_dump_mci_btcoex(struct ath_softc *sc, u8 *buf, u32 size) 453{ 454 struct ath_btcoex *btcoex = &sc->btcoex; 455 struct ath_mci_profile *mci = &btcoex->mci; 456 struct ath_hw *ah = sc->sc_ah; 457 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 458 u32 len = 0; 459 int i; 460 461 ATH_DUMP_BTCOEX("Total BT profiles", NUM_PROF(mci)); 462 ATH_DUMP_BTCOEX("MGMT", mci->num_mgmt); 463 ATH_DUMP_BTCOEX("SCO", mci->num_sco); 464 ATH_DUMP_BTCOEX("A2DP", mci->num_a2dp); 465 ATH_DUMP_BTCOEX("HID", mci->num_hid); 466 ATH_DUMP_BTCOEX("PAN", mci->num_pan); 467 ATH_DUMP_BTCOEX("ACL", mci->num_other_acl); 468 ATH_DUMP_BTCOEX("BDR", mci->num_bdr); 469 ATH_DUMP_BTCOEX("Aggr. Limit", mci->aggr_limit); 470 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type); 471 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period); 472 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle); 473 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time); 474 ATH_DUMP_BTCOEX("Concurrent Tx", btcoex_hw->mci.concur_tx); 475 ATH_DUMP_BTCOEX("Concurrent RSSI cnt", btcoex->rssi_count); 476 477 len += scnprintf(buf + len, size - len, "BT Weights: "); 478 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 479 len += scnprintf(buf + len, size - len, "%08x ", 480 btcoex_hw->bt_weight[i]); 481 len += scnprintf(buf + len, size - len, "\n"); 482 len += scnprintf(buf + len, size - len, "WLAN Weights: "); 483 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 484 len += scnprintf(buf + len, size - len, "%08x ", 485 btcoex_hw->wlan_weight[i]); 486 len += scnprintf(buf + len, size - len, "\n"); 487 len += scnprintf(buf + len, size - len, "Tx Priorities: "); 488 for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++) 489 len += scnprintf(buf + len, size - len, "%08x ", 490 btcoex_hw->tx_prio[i]); 491 492 len += scnprintf(buf + len, size - len, "\n"); 493 494 return len; 495} 496 497static int ath9k_dump_legacy_btcoex(struct ath_softc *sc, u8 *buf, u32 size) 498{ 499 500 struct ath_btcoex *btcoex = &sc->btcoex; 501 u32 len = 0; 502 503 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type); 504 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period); 505 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle); 506 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time); 507 508 return len; 509} 510 511int ath9k_dump_btcoex(struct ath_softc *sc, u8 *buf, u32 size) 512{ 513 if (ath9k_hw_mci_is_enabled(sc->sc_ah)) 514 return ath9k_dump_mci_btcoex(sc, buf, size); 515 else 516 return ath9k_dump_legacy_btcoex(sc, buf, size); 517} 518 519#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */ 520