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 ath_mci_ftp_adjust(struct ath_softc *sc) 161 { 162 struct ath_btcoex *btcoex = &sc->btcoex; 163 struct ath_mci_profile *mci = &btcoex->mci; 164 struct ath_hw *ah = sc->sc_ah; 165 166 if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) { 167 if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) && 168 (mci->num_pan || mci->num_other_acl)) 169 ah->btcoex_hw.mci.stomp_ftp = 170 (sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH); 171 else 172 ah->btcoex_hw.mci.stomp_ftp = false; 173 btcoex->bt_wait_time = 0; 174 sc->rx.num_pkts = 0; 175 } 176 } 177 178 /* 179 * This is the master bt coex timer which runs for every 180 * 45ms, bt traffic will be given priority during 55% of this 181 * period while wlan gets remaining 45% 182 */ 183 static void ath_btcoex_period_timer(unsigned long data) 184 { 185 struct ath_softc *sc = (struct ath_softc *) data; 186 struct ath_hw *ah = sc->sc_ah; 187 struct ath_btcoex *btcoex = &sc->btcoex; 188 enum ath_stomp_type stomp_type; 189 u32 timer_period; 190 unsigned long flags; 191 192 spin_lock_irqsave(&sc->sc_pm_lock, flags); 193 if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) { 194 btcoex->bt_wait_time += btcoex->btcoex_period; 195 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 196 goto skip_hw_wakeup; 197 } 198 spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 199 200 ath9k_mci_update_rssi(sc); 201 202 ath9k_ps_wakeup(sc); 203 204 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 205 ath_detect_bt_priority(sc); 206 207 if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) 208 ath_mci_ftp_adjust(sc); 209 210 spin_lock_bh(&btcoex->btcoex_lock); 211 212 stomp_type = btcoex->bt_stomp_type; 213 timer_period = btcoex->btcoex_no_stomp; 214 215 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) { 216 if (test_bit(BT_OP_SCAN, &btcoex->op_flags)) { 217 stomp_type = ATH_BTCOEX_STOMP_ALL; 218 timer_period = btcoex->btscan_no_stomp; 219 } 220 } else if (btcoex->stomp_audio >= 5) { 221 stomp_type = ATH_BTCOEX_STOMP_AUDIO; 222 btcoex->stomp_audio = 0; 223 } 224 225 ath9k_hw_btcoex_bt_stomp(ah, stomp_type); 226 ath9k_hw_btcoex_enable(ah); 227 228 spin_unlock_bh(&btcoex->btcoex_lock); 229 230 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) 231 mod_timer(&btcoex->no_stomp_timer, 232 jiffies + msecs_to_jiffies(timer_period)); 233 234 ath9k_ps_restore(sc); 235 236 skip_hw_wakeup: 237 mod_timer(&btcoex->period_timer, 238 jiffies + msecs_to_jiffies(btcoex->btcoex_period)); 239 } 240 241 /* 242 * Generic tsf based hw timer which configures weight 243 * registers to time slice between wlan and bt traffic 244 */ 245 static void ath_btcoex_no_stomp_timer(unsigned long arg) 246 { 247 struct ath_softc *sc = (struct ath_softc *)arg; 248 struct ath_hw *ah = sc->sc_ah; 249 struct ath_btcoex *btcoex = &sc->btcoex; 250 struct ath_common *common = ath9k_hw_common(ah); 251 252 ath_dbg(common, BTCOEX, "no stomp timer running\n"); 253 254 ath9k_ps_wakeup(sc); 255 spin_lock_bh(&btcoex->btcoex_lock); 256 257 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || 258 (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && 259 test_bit(BT_OP_SCAN, &btcoex->op_flags))) 260 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 261 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 262 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); 263 264 ath9k_hw_btcoex_enable(ah); 265 spin_unlock_bh(&btcoex->btcoex_lock); 266 ath9k_ps_restore(sc); 267 } 268 269 static int ath_init_btcoex_timer(struct ath_softc *sc) 270 { 271 struct ath_btcoex *btcoex = &sc->btcoex; 272 273 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; 274 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 275 btcoex->btcoex_period / 100; 276 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 277 btcoex->btcoex_period / 100; 278 279 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer, 280 (unsigned long) sc); 281 setup_timer(&btcoex->no_stomp_timer, ath_btcoex_no_stomp_timer, 282 (unsigned long) sc); 283 284 spin_lock_init(&btcoex->btcoex_lock); 285 286 return 0; 287 } 288 289 /* 290 * (Re)start btcoex timers 291 */ 292 void ath9k_btcoex_timer_resume(struct ath_softc *sc) 293 { 294 struct ath_btcoex *btcoex = &sc->btcoex; 295 struct ath_hw *ah = sc->sc_ah; 296 297 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n"); 298 299 /* make sure duty cycle timer is also stopped when resuming */ 300 del_timer_sync(&btcoex->no_stomp_timer); 301 302 btcoex->bt_priority_cnt = 0; 303 btcoex->bt_priority_time = jiffies; 304 clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); 305 clear_bit(BT_OP_SCAN, &btcoex->op_flags); 306 307 mod_timer(&btcoex->period_timer, jiffies); 308 } 309 310 311 /* 312 * Pause btcoex timer and bt duty cycle timer 313 */ 314 void ath9k_btcoex_timer_pause(struct ath_softc *sc) 315 { 316 struct ath_btcoex *btcoex = &sc->btcoex; 317 318 del_timer_sync(&btcoex->period_timer); 319 del_timer_sync(&btcoex->no_stomp_timer); 320 } 321 322 void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc) 323 { 324 struct ath_btcoex *btcoex = &sc->btcoex; 325 326 del_timer_sync(&btcoex->no_stomp_timer); 327 } 328 329 u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen) 330 { 331 struct ath_btcoex *btcoex = &sc->btcoex; 332 struct ath_mci_profile *mci = &sc->btcoex.mci; 333 u16 aggr_limit = 0; 334 335 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit) 336 aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4; 337 else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags)) 338 aggr_limit = min((max_4ms_framelen * 3) / 8, 339 (u32)ATH_AMPDU_LIMIT_MAX); 340 341 return aggr_limit; 342 } 343 344 void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status) 345 { 346 if (status & ATH9K_INT_MCI) 347 ath_mci_intr(sc); 348 } 349 350 void ath9k_start_btcoex(struct ath_softc *sc) 351 { 352 struct ath_hw *ah = sc->sc_ah; 353 354 if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) && 355 !ah->btcoex_hw.enabled) { 356 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 357 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 358 AR_STOMP_LOW_WLAN_WGHT, 0); 359 else 360 ath9k_hw_btcoex_set_weight(ah, 0, 0, 361 ATH_BTCOEX_STOMP_NONE); 362 ath9k_hw_btcoex_enable(ah); 363 364 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 365 ath9k_btcoex_timer_resume(sc); 366 } 367 } 368 369 void ath9k_stop_btcoex(struct ath_softc *sc) 370 { 371 struct ath_hw *ah = sc->sc_ah; 372 373 if (ah->btcoex_hw.enabled && 374 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) { 375 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 376 ath9k_btcoex_timer_pause(sc); 377 ath9k_hw_btcoex_disable(ah); 378 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) 379 ath_mci_flush_profile(&sc->btcoex.mci); 380 } 381 } 382 383 void ath9k_deinit_btcoex(struct ath_softc *sc) 384 { 385 struct ath_hw *ah = sc->sc_ah; 386 387 if (ath9k_hw_mci_is_enabled(ah)) 388 ath_mci_cleanup(sc); 389 } 390 391 int ath9k_init_btcoex(struct ath_softc *sc) 392 { 393 struct ath_txq *txq; 394 struct ath_hw *ah = sc->sc_ah; 395 int r; 396 397 ath9k_hw_btcoex_init_scheme(ah); 398 399 switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) { 400 case ATH_BTCOEX_CFG_NONE: 401 break; 402 case ATH_BTCOEX_CFG_2WIRE: 403 ath9k_hw_btcoex_init_2wire(sc->sc_ah); 404 break; 405 case ATH_BTCOEX_CFG_3WIRE: 406 ath9k_hw_btcoex_init_3wire(sc->sc_ah); 407 r = ath_init_btcoex_timer(sc); 408 if (r) 409 return -1; 410 txq = sc->tx.txq_map[IEEE80211_AC_BE]; 411 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum); 412 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW; 413 if (ath9k_hw_mci_is_enabled(ah)) { 414 sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE; 415 INIT_LIST_HEAD(&sc->btcoex.mci.info); 416 417 r = ath_mci_setup(sc); 418 if (r) 419 return r; 420 421 ath9k_hw_btcoex_init_mci(ah); 422 } 423 424 break; 425 default: 426 WARN_ON(1); 427 break; 428 } 429 430 return 0; 431 } 432 433 static int ath9k_dump_mci_btcoex(struct ath_softc *sc, u8 *buf, u32 size) 434 { 435 struct ath_btcoex *btcoex = &sc->btcoex; 436 struct ath_mci_profile *mci = &btcoex->mci; 437 struct ath_hw *ah = sc->sc_ah; 438 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; 439 u32 len = 0; 440 int i; 441 442 ATH_DUMP_BTCOEX("Total BT profiles", NUM_PROF(mci)); 443 ATH_DUMP_BTCOEX("MGMT", mci->num_mgmt); 444 ATH_DUMP_BTCOEX("SCO", mci->num_sco); 445 ATH_DUMP_BTCOEX("A2DP", mci->num_a2dp); 446 ATH_DUMP_BTCOEX("HID", mci->num_hid); 447 ATH_DUMP_BTCOEX("PAN", mci->num_pan); 448 ATH_DUMP_BTCOEX("ACL", mci->num_other_acl); 449 ATH_DUMP_BTCOEX("BDR", mci->num_bdr); 450 ATH_DUMP_BTCOEX("Aggr. Limit", mci->aggr_limit); 451 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type); 452 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period); 453 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle); 454 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time); 455 ATH_DUMP_BTCOEX("Concurrent Tx", btcoex_hw->mci.concur_tx); 456 ATH_DUMP_BTCOEX("Concurrent RSSI cnt", btcoex->rssi_count); 457 458 len += scnprintf(buf + len, size - len, "BT Weights: "); 459 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 460 len += scnprintf(buf + len, size - len, "%08x ", 461 btcoex_hw->bt_weight[i]); 462 len += scnprintf(buf + len, size - len, "\n"); 463 len += scnprintf(buf + len, size - len, "WLAN Weights: "); 464 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) 465 len += scnprintf(buf + len, size - len, "%08x ", 466 btcoex_hw->wlan_weight[i]); 467 len += scnprintf(buf + len, size - len, "\n"); 468 len += scnprintf(buf + len, size - len, "Tx Priorities: "); 469 for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++) 470 len += scnprintf(buf + len, size - len, "%08x ", 471 btcoex_hw->tx_prio[i]); 472 473 len += scnprintf(buf + len, size - len, "\n"); 474 475 return len; 476 } 477 478 static int ath9k_dump_legacy_btcoex(struct ath_softc *sc, u8 *buf, u32 size) 479 { 480 481 struct ath_btcoex *btcoex = &sc->btcoex; 482 u32 len = 0; 483 484 ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type); 485 ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period); 486 ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle); 487 ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time); 488 489 return len; 490 } 491 492 int ath9k_dump_btcoex(struct ath_softc *sc, u8 *buf, u32 size) 493 { 494 if (ath9k_hw_mci_is_enabled(sc->sc_ah)) 495 return ath9k_dump_mci_btcoex(sc, buf, size); 496 else 497 return ath9k_dump_legacy_btcoex(sc, buf, size); 498 } 499 500 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */ 501