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 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 136 /* Detect if colocated bt started scanning */ 137 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 138 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 139 "BT scan detected\n"); 140 sc->sc_flags |= (SC_OP_BT_SCAN | 141 SC_OP_BT_PRIORITY_DETECTED); 142 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 143 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 144 "BT priority traffic detected\n"); 145 sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED; 146 } 147 148 btcoex->bt_priority_cnt = 0; 149 btcoex->bt_priority_time = jiffies; 150 } 151 } 152 153 static void ath9k_gen_timer_start(struct ath_hw *ah, 154 struct ath_gen_timer *timer, 155 u32 trig_timeout, 156 u32 timer_period) 157 { 158 ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period); 159 160 if ((ah->imask & ATH9K_INT_GENTIMER) == 0) { 161 ath9k_hw_disable_interrupts(ah); 162 ah->imask |= ATH9K_INT_GENTIMER; 163 ath9k_hw_set_interrupts(ah); 164 ath9k_hw_enable_interrupts(ah); 165 } 166 } 167 168 static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer) 169 { 170 struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers; 171 172 ath9k_hw_gen_timer_stop(ah, timer); 173 174 /* if no timer is enabled, turn off interrupt mask */ 175 if (timer_table->timer_mask.val == 0) { 176 ath9k_hw_disable_interrupts(ah); 177 ah->imask &= ~ATH9K_INT_GENTIMER; 178 ath9k_hw_set_interrupts(ah); 179 ath9k_hw_enable_interrupts(ah); 180 } 181 } 182 183 /* 184 * This is the master bt coex timer which runs for every 185 * 45ms, bt traffic will be given priority during 55% of this 186 * period while wlan gets remaining 45% 187 */ 188 static void ath_btcoex_period_timer(unsigned long data) 189 { 190 struct ath_softc *sc = (struct ath_softc *) data; 191 struct ath_hw *ah = sc->sc_ah; 192 struct ath_btcoex *btcoex = &sc->btcoex; 193 u32 timer_period; 194 bool is_btscan; 195 196 ath9k_ps_wakeup(sc); 197 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 198 ath_detect_bt_priority(sc); 199 is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 200 201 spin_lock_bh(&btcoex->btcoex_lock); 202 203 ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL : 204 btcoex->bt_stomp_type); 205 206 ath9k_hw_btcoex_enable(ah); 207 spin_unlock_bh(&btcoex->btcoex_lock); 208 209 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) { 210 if (btcoex->hw_timer_enabled) 211 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 212 213 timer_period = is_btscan ? btcoex->btscan_no_stomp : 214 btcoex->btcoex_no_stomp; 215 ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period, 216 timer_period * 10); 217 btcoex->hw_timer_enabled = true; 218 } 219 220 ath9k_ps_restore(sc); 221 timer_period = btcoex->btcoex_period / 1000; 222 mod_timer(&btcoex->period_timer, jiffies + 223 msecs_to_jiffies(timer_period)); 224 } 225 226 /* 227 * Generic tsf based hw timer which configures weight 228 * registers to time slice between wlan and bt traffic 229 */ 230 static void ath_btcoex_no_stomp_timer(void *arg) 231 { 232 struct ath_softc *sc = (struct ath_softc *)arg; 233 struct ath_hw *ah = sc->sc_ah; 234 struct ath_btcoex *btcoex = &sc->btcoex; 235 struct ath_common *common = ath9k_hw_common(ah); 236 bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 237 238 ath_dbg(common, BTCOEX, "no stomp timer running\n"); 239 240 ath9k_ps_wakeup(sc); 241 spin_lock_bh(&btcoex->btcoex_lock); 242 243 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) 244 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 245 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 246 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); 247 248 ath9k_hw_btcoex_enable(ah); 249 spin_unlock_bh(&btcoex->btcoex_lock); 250 ath9k_ps_restore(sc); 251 } 252 253 static int ath_init_btcoex_timer(struct ath_softc *sc) 254 { 255 struct ath_btcoex *btcoex = &sc->btcoex; 256 257 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000; 258 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 259 btcoex->btcoex_period / 100; 260 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 261 btcoex->btcoex_period / 100; 262 263 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer, 264 (unsigned long) sc); 265 266 spin_lock_init(&btcoex->btcoex_lock); 267 268 btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah, 269 ath_btcoex_no_stomp_timer, 270 ath_btcoex_no_stomp_timer, 271 (void *) sc, AR_FIRST_NDP_TIMER); 272 273 if (!btcoex->no_stomp_timer) 274 return -ENOMEM; 275 276 return 0; 277 } 278 279 /* 280 * (Re)start btcoex timers 281 */ 282 void ath9k_btcoex_timer_resume(struct ath_softc *sc) 283 { 284 struct ath_btcoex *btcoex = &sc->btcoex; 285 struct ath_hw *ah = sc->sc_ah; 286 287 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n"); 288 289 /* make sure duty cycle timer is also stopped when resuming */ 290 if (btcoex->hw_timer_enabled) 291 ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer); 292 293 btcoex->bt_priority_cnt = 0; 294 btcoex->bt_priority_time = jiffies; 295 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 296 297 mod_timer(&btcoex->period_timer, jiffies); 298 } 299 300 301 /* 302 * Pause btcoex timer and bt duty cycle timer 303 */ 304 void ath9k_btcoex_timer_pause(struct ath_softc *sc) 305 { 306 struct ath_btcoex *btcoex = &sc->btcoex; 307 struct ath_hw *ah = sc->sc_ah; 308 309 del_timer_sync(&btcoex->period_timer); 310 311 if (btcoex->hw_timer_enabled) 312 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 313 314 btcoex->hw_timer_enabled = false; 315 } 316 317 u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen) 318 { 319 struct ath_mci_profile *mci = &sc->btcoex.mci; 320 u16 aggr_limit = 0; 321 322 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit) 323 aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4; 324 else if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED) 325 aggr_limit = min((max_4ms_framelen * 3) / 8, 326 (u32)ATH_AMPDU_LIMIT_MAX); 327 328 return aggr_limit; 329 } 330 331 void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status) 332 { 333 struct ath_hw *ah = sc->sc_ah; 334 335 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 336 if (status & ATH9K_INT_GENTIMER) 337 ath_gen_timer_isr(sc->sc_ah); 338 339 if (status & ATH9K_INT_MCI) 340 ath_mci_intr(sc); 341 } 342 343 void ath9k_start_btcoex(struct ath_softc *sc) 344 { 345 struct ath_hw *ah = sc->sc_ah; 346 347 if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) && 348 !ah->btcoex_hw.enabled) { 349 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 350 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 351 AR_STOMP_LOW_WLAN_WGHT); 352 ath9k_hw_btcoex_enable(ah); 353 354 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 355 ath9k_btcoex_timer_resume(sc); 356 } 357 } 358 359 void ath9k_stop_btcoex(struct ath_softc *sc) 360 { 361 struct ath_hw *ah = sc->sc_ah; 362 363 if (ah->btcoex_hw.enabled && 364 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) { 365 ath9k_hw_btcoex_disable(ah); 366 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 367 ath9k_btcoex_timer_pause(sc); 368 if (AR_SREV_9462(ah)) 369 ath_mci_flush_profile(&sc->btcoex.mci); 370 } 371 } 372 373 void ath9k_deinit_btcoex(struct ath_softc *sc) 374 { 375 if ((sc->btcoex.no_stomp_timer) && 376 ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_3WIRE) 377 ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer); 378 379 if (AR_SREV_9462(sc->sc_ah)) 380 ath_mci_cleanup(sc); 381 } 382 383 int ath9k_init_btcoex(struct ath_softc *sc) 384 { 385 struct ath_txq *txq; 386 struct ath_hw *ah = sc->sc_ah; 387 int r; 388 389 ath9k_hw_btcoex_init_scheme(ah); 390 391 switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) { 392 case ATH_BTCOEX_CFG_NONE: 393 break; 394 case ATH_BTCOEX_CFG_2WIRE: 395 ath9k_hw_btcoex_init_2wire(sc->sc_ah); 396 break; 397 case ATH_BTCOEX_CFG_3WIRE: 398 ath9k_hw_btcoex_init_3wire(sc->sc_ah); 399 r = ath_init_btcoex_timer(sc); 400 if (r) 401 return -1; 402 txq = sc->tx.txq_map[WME_AC_BE]; 403 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum); 404 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW; 405 if (AR_SREV_9462(ah)) { 406 sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE; 407 INIT_LIST_HEAD(&sc->btcoex.mci.info); 408 409 r = ath_mci_setup(sc); 410 if (r) 411 return r; 412 413 ath9k_hw_btcoex_init_mci(ah); 414 } 415 416 break; 417 default: 418 WARN_ON(1); 419 break; 420 } 421 422 return 0; 423 } 424 425 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */ 426