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 25 static 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 51 static 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 63 void 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 74 void 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 /*******************/ 103 104 static 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 } 116 117 void 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 } 124 125 void 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 */ 142 static 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 } 170 171 static 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 */ 194 static void ath_btcoex_period_timer(unsigned long data) 195 { 196 struct ath_softc *sc = (struct ath_softc *) data; 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); 245 246 skip_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 */ 255 static void ath_btcoex_no_stomp_timer(unsigned long arg) 256 { 257 struct ath_softc *sc = (struct ath_softc *)arg; 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 } 275 276 static 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 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer, 288 (unsigned long) sc); 289 setup_timer(&btcoex->no_stomp_timer, ath_btcoex_no_stomp_timer, 290 (unsigned long) sc); 291 292 spin_lock_init(&btcoex->btcoex_lock); 293 } 294 295 /* 296 * (Re)start btcoex timers 297 */ 298 void ath9k_btcoex_timer_resume(struct ath_softc *sc) 299 { 300 struct ath_btcoex *btcoex = &sc->btcoex; 301 struct ath_hw *ah = sc->sc_ah; 302 303 if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_3WIRE && 304 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI) 305 return; 306 307 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n"); 308 309 /* make sure duty cycle timer is also stopped when resuming */ 310 del_timer_sync(&btcoex->no_stomp_timer); 311 312 btcoex->bt_priority_cnt = 0; 313 btcoex->bt_priority_time = jiffies; 314 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 315 clear_bit(BT_OP_SCAN, &btcoex->op_flags); 316 317 mod_timer(&btcoex->period_timer, jiffies); 318 } 319 320 /* 321 * Pause btcoex timer and bt duty cycle timer 322 */ 323 void ath9k_btcoex_timer_pause(struct ath_softc *sc) 324 { 325 struct ath_btcoex *btcoex = &sc->btcoex; 326 struct ath_hw *ah = sc->sc_ah; 327 328 if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_3WIRE && 329 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI) 330 return; 331 332 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Stopping btcoex timers\n"); 333 334 del_timer_sync(&btcoex->period_timer); 335 del_timer_sync(&btcoex->no_stomp_timer); 336 } 337 338 void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc) 339 { 340 struct ath_btcoex *btcoex = &sc->btcoex; 341 342 del_timer_sync(&btcoex->no_stomp_timer); 343 } 344 345 u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen) 346 { 347 struct ath_btcoex *btcoex = &sc->btcoex; 348 struct ath_mci_profile *mci = &sc->btcoex.mci; 349 u16 aggr_limit = 0; 350 351 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit) 352 aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4; 353 else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags)) 354 aggr_limit = min((max_4ms_framelen * 3) / 8, 355 (u32)ATH_AMPDU_LIMIT_MAX); 356 357 return aggr_limit; 358 } 359 360 void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status) 361 { 362 if (status & ATH9K_INT_MCI) 363 ath_mci_intr(sc); 364 } 365 366 void ath9k_start_btcoex(struct ath_softc *sc) 367 { 368 struct ath_hw *ah = sc->sc_ah; 369 370 if (ah->btcoex_hw.enabled || 371 ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE) 372 return; 373 374 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 375 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 376 AR_STOMP_LOW_WLAN_WGHT, 0); 377 else 378 ath9k_hw_btcoex_set_weight(ah, 0, 0, 379 ATH_BTCOEX_STOMP_NONE); 380 ath9k_hw_btcoex_enable(ah); 381 ath9k_btcoex_timer_resume(sc); 382 } 383 384 void ath9k_stop_btcoex(struct ath_softc *sc) 385 { 386 struct ath_hw *ah = sc->sc_ah; 387 388 if (!ah->btcoex_hw.enabled || 389 ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE) 390 return; 391 392 ath9k_btcoex_timer_pause(sc); 393 ath9k_hw_btcoex_disable(ah); 394 395 if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) 396 ath_mci_flush_profile(&sc->btcoex.mci); 397 } 398 399 void ath9k_deinit_btcoex(struct ath_softc *sc) 400 { 401 struct ath_hw *ah = sc->sc_ah; 402 403 if (ath9k_hw_mci_is_enabled(ah)) 404 ath_mci_cleanup(sc); 405 else { 406 enum ath_btcoex_scheme scheme = ath9k_hw_get_btcoex_scheme(ah); 407 408 if (scheme == ATH_BTCOEX_CFG_2WIRE || 409 scheme == ATH_BTCOEX_CFG_3WIRE) 410 ath9k_hw_btcoex_deinit(sc->sc_ah); 411 } 412 } 413 414 int ath9k_init_btcoex(struct ath_softc *sc) 415 { 416 struct ath_txq *txq; 417 struct ath_hw *ah = sc->sc_ah; 418 int r; 419 420 ath9k_hw_btcoex_init_scheme(ah); 421 422 switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) { 423 case ATH_BTCOEX_CFG_NONE: 424 break; 425 case ATH_BTCOEX_CFG_2WIRE: 426 ath9k_hw_btcoex_init_2wire(sc->sc_ah); 427 break; 428 case ATH_BTCOEX_CFG_3WIRE: 429 ath9k_hw_btcoex_init_3wire(sc->sc_ah); 430 ath_init_btcoex_timer(sc); 431 txq = sc->tx.txq_map[IEEE80211_AC_BE]; 432 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum); 433 break; 434 case ATH_BTCOEX_CFG_MCI: 435 ath_init_btcoex_timer(sc); 436 437 sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE; 438 INIT_LIST_HEAD(&sc->btcoex.mci.info); 439 ath9k_hw_btcoex_init_mci(ah); 440 441 r = ath_mci_setup(sc); 442 if (r) 443 return r; 444 445 break; 446 default: 447 WARN_ON(1); 448 break; 449 } 450 451 return 0; 452 } 453 454 static int ath9k_dump_mci_btcoex(struct ath_softc *sc, u8 *buf, u32 size) 455 { 456 struct ath_btcoex *btcoex = &sc->btcoex; 457 struct ath_mci_profile *mci = &btcoex->mci; 458 struct ath_hw *ah = sc->sc_ah; 459 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 460 u32 len = 0; 461 int i; 462 463 ATH_DUMP_BTCOEX("Total BT profiles", NUM_PROF(mci)); 464 ATH_DUMP_BTCOEX("MGMT", mci->num_mgmt); 465 ATH_DUMP_BTCOEX("SCO", mci->num_sco); 466 ATH_DUMP_BTCOEX("A2DP", mci->num_a2dp); 467 ATH_DUMP_BTCOEX("HID", mci->num_hid); 468 ATH_DUMP_BTCOEX("PAN", mci->num_pan); 469 ATH_DUMP_BTCOEX("ACL", mci->num_other_acl); 470 ATH_DUMP_BTCOEX("BDR", mci->num_bdr); 471 ATH_DUMP_BTCOEX("Aggr. Limit", mci->aggr_limit); 472 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type); 473 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period); 474 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle); 475 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time); 476 ATH_DUMP_BTCOEX("Concurrent Tx", btcoex_hw->mci.concur_tx); 477 ATH_DUMP_BTCOEX("Concurrent RSSI cnt", btcoex->rssi_count); 478 479 len += scnprintf(buf + len, size - len, "BT Weights: "); 480 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 481 len += scnprintf(buf + len, size - len, "%08x ", 482 btcoex_hw->bt_weight[i]); 483 len += scnprintf(buf + len, size - len, "\n"); 484 len += scnprintf(buf + len, size - len, "WLAN Weights: "); 485 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 486 len += scnprintf(buf + len, size - len, "%08x ", 487 btcoex_hw->wlan_weight[i]); 488 len += scnprintf(buf + len, size - len, "\n"); 489 len += scnprintf(buf + len, size - len, "Tx Priorities: "); 490 for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++) 491 len += scnprintf(buf + len, size - len, "%08x ", 492 btcoex_hw->tx_prio[i]); 493 494 len += scnprintf(buf + len, size - len, "\n"); 495 496 return len; 497 } 498 499 static int ath9k_dump_legacy_btcoex(struct ath_softc *sc, u8 *buf, u32 size) 500 { 501 502 struct ath_btcoex *btcoex = &sc->btcoex; 503 u32 len = 0; 504 505 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type); 506 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period); 507 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle); 508 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time); 509 510 return len; 511 } 512 513 int ath9k_dump_btcoex(struct ath_softc *sc, u8 *buf, u32 size) 514 { 515 if (ath9k_hw_mci_is_enabled(sc->sc_ah)) 516 return ath9k_dump_mci_btcoex(sc, buf, size); 517 else 518 return ath9k_dump_legacy_btcoex(sc, buf, size); 519 } 520 521 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */ 522