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 (sc->sc_ah->led_pin < 0) { 45 if (AR_SREV_9287(sc->sc_ah)) 46 sc->sc_ah->led_pin = ATH_LED_PIN_9287; 47 else if (AR_SREV_9485(sc->sc_ah)) 48 sc->sc_ah->led_pin = ATH_LED_PIN_9485; 49 else if (AR_SREV_9300(sc->sc_ah)) 50 sc->sc_ah->led_pin = ATH_LED_PIN_9300; 51 else if (AR_SREV_9462(sc->sc_ah)) 52 sc->sc_ah->led_pin = ATH_LED_PIN_9462; 53 else 54 sc->sc_ah->led_pin = ATH_LED_PIN_DEF; 55 } 56 57 /* Configure gpio 1 for output */ 58 ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin, 59 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 60 /* LED off, active low */ 61 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1); 62 63 if (!led_blink) 64 sc->led_cdev.default_trigger = 65 ieee80211_get_radio_led_name(sc->hw); 66 67 snprintf(sc->led_name, sizeof(sc->led_name), 68 "ath9k-%s", wiphy_name(sc->hw->wiphy)); 69 sc->led_cdev.name = sc->led_name; 70 sc->led_cdev.brightness_set = ath_led_brightness; 71 72 ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev); 73 if (ret < 0) 74 return; 75 76 sc->led_registered = true; 77 } 78 #endif 79 80 /*******************/ 81 /* Rfkill */ 82 /*******************/ 83 84 static bool ath_is_rfkill_set(struct ath_softc *sc) 85 { 86 struct ath_hw *ah = sc->sc_ah; 87 bool is_blocked; 88 89 ath9k_ps_wakeup(sc); 90 is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) == 91 ah->rfkill_polarity; 92 ath9k_ps_restore(sc); 93 94 return is_blocked; 95 } 96 97 void ath9k_rfkill_poll_state(struct ieee80211_hw *hw) 98 { 99 struct ath_softc *sc = hw->priv; 100 bool blocked = !!ath_is_rfkill_set(sc); 101 102 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 103 } 104 105 void ath_start_rfkill_poll(struct ath_softc *sc) 106 { 107 struct ath_hw *ah = sc->sc_ah; 108 109 if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 110 wiphy_rfkill_start_polling(sc->hw->wiphy); 111 } 112 113 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT 114 115 /******************/ 116 /* BTCOEX */ 117 /******************/ 118 119 /* 120 * Detects if there is any priority bt traffic 121 */ 122 static void ath_detect_bt_priority(struct ath_softc *sc) 123 { 124 struct ath_btcoex *btcoex = &sc->btcoex; 125 struct ath_hw *ah = sc->sc_ah; 126 127 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio)) 128 btcoex->bt_priority_cnt++; 129 130 if (time_after(jiffies, btcoex->bt_priority_time + 131 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { 132 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 133 /* Detect if colocated bt started scanning */ 134 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 135 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 136 "BT scan detected\n"); 137 sc->sc_flags |= (SC_OP_BT_SCAN | 138 SC_OP_BT_PRIORITY_DETECTED); 139 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 140 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 141 "BT priority traffic detected\n"); 142 sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED; 143 } 144 145 btcoex->bt_priority_cnt = 0; 146 btcoex->bt_priority_time = jiffies; 147 } 148 } 149 150 static void ath9k_gen_timer_start(struct ath_hw *ah, 151 struct ath_gen_timer *timer, 152 u32 trig_timeout, 153 u32 timer_period) 154 { 155 ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period); 156 157 if ((ah->imask & ATH9K_INT_GENTIMER) == 0) { 158 ath9k_hw_disable_interrupts(ah); 159 ah->imask |= ATH9K_INT_GENTIMER; 160 ath9k_hw_set_interrupts(ah); 161 ath9k_hw_enable_interrupts(ah); 162 } 163 } 164 165 static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer) 166 { 167 struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers; 168 169 ath9k_hw_gen_timer_stop(ah, timer); 170 171 /* if no timer is enabled, turn off interrupt mask */ 172 if (timer_table->timer_mask.val == 0) { 173 ath9k_hw_disable_interrupts(ah); 174 ah->imask &= ~ATH9K_INT_GENTIMER; 175 ath9k_hw_set_interrupts(ah); 176 ath9k_hw_enable_interrupts(ah); 177 } 178 } 179 180 /* 181 * This is the master bt coex timer which runs for every 182 * 45ms, bt traffic will be given priority during 55% of this 183 * period while wlan gets remaining 45% 184 */ 185 static void ath_btcoex_period_timer(unsigned long data) 186 { 187 struct ath_softc *sc = (struct ath_softc *) data; 188 struct ath_hw *ah = sc->sc_ah; 189 struct ath_btcoex *btcoex = &sc->btcoex; 190 u32 timer_period; 191 bool is_btscan; 192 193 ath9k_ps_wakeup(sc); 194 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 195 ath_detect_bt_priority(sc); 196 is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 197 198 spin_lock_bh(&btcoex->btcoex_lock); 199 200 ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL : 201 btcoex->bt_stomp_type); 202 203 ath9k_hw_btcoex_enable(ah); 204 spin_unlock_bh(&btcoex->btcoex_lock); 205 206 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) { 207 if (btcoex->hw_timer_enabled) 208 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 209 210 timer_period = is_btscan ? btcoex->btscan_no_stomp : 211 btcoex->btcoex_no_stomp; 212 ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period, 213 timer_period * 10); 214 btcoex->hw_timer_enabled = true; 215 } 216 217 ath9k_ps_restore(sc); 218 timer_period = btcoex->btcoex_period / 1000; 219 mod_timer(&btcoex->period_timer, jiffies + 220 msecs_to_jiffies(timer_period)); 221 } 222 223 /* 224 * Generic tsf based hw timer which configures weight 225 * registers to time slice between wlan and bt traffic 226 */ 227 static void ath_btcoex_no_stomp_timer(void *arg) 228 { 229 struct ath_softc *sc = (struct ath_softc *)arg; 230 struct ath_hw *ah = sc->sc_ah; 231 struct ath_btcoex *btcoex = &sc->btcoex; 232 struct ath_common *common = ath9k_hw_common(ah); 233 bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 234 235 ath_dbg(common, BTCOEX, "no stomp timer running\n"); 236 237 ath9k_ps_wakeup(sc); 238 spin_lock_bh(&btcoex->btcoex_lock); 239 240 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) 241 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 242 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 243 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); 244 245 ath9k_hw_btcoex_enable(ah); 246 spin_unlock_bh(&btcoex->btcoex_lock); 247 ath9k_ps_restore(sc); 248 } 249 250 static int ath_init_btcoex_timer(struct ath_softc *sc) 251 { 252 struct ath_btcoex *btcoex = &sc->btcoex; 253 254 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000; 255 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 256 btcoex->btcoex_period / 100; 257 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 258 btcoex->btcoex_period / 100; 259 260 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer, 261 (unsigned long) sc); 262 263 spin_lock_init(&btcoex->btcoex_lock); 264 265 btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah, 266 ath_btcoex_no_stomp_timer, 267 ath_btcoex_no_stomp_timer, 268 (void *) sc, AR_FIRST_NDP_TIMER); 269 270 if (!btcoex->no_stomp_timer) 271 return -ENOMEM; 272 273 return 0; 274 } 275 276 /* 277 * (Re)start btcoex timers 278 */ 279 void ath9k_btcoex_timer_resume(struct ath_softc *sc) 280 { 281 struct ath_btcoex *btcoex = &sc->btcoex; 282 struct ath_hw *ah = sc->sc_ah; 283 284 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n"); 285 286 /* make sure duty cycle timer is also stopped when resuming */ 287 if (btcoex->hw_timer_enabled) 288 ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer); 289 290 btcoex->bt_priority_cnt = 0; 291 btcoex->bt_priority_time = jiffies; 292 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 293 294 mod_timer(&btcoex->period_timer, jiffies); 295 } 296 297 298 /* 299 * Pause btcoex timer and bt duty cycle timer 300 */ 301 void ath9k_btcoex_timer_pause(struct ath_softc *sc) 302 { 303 struct ath_btcoex *btcoex = &sc->btcoex; 304 struct ath_hw *ah = sc->sc_ah; 305 306 del_timer_sync(&btcoex->period_timer); 307 308 if (btcoex->hw_timer_enabled) 309 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 310 311 btcoex->hw_timer_enabled = false; 312 } 313 314 u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen) 315 { 316 struct ath_mci_profile *mci = &sc->btcoex.mci; 317 u16 aggr_limit = 0; 318 319 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit) 320 aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4; 321 else if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED) 322 aggr_limit = min((max_4ms_framelen * 3) / 8, 323 (u32)ATH_AMPDU_LIMIT_MAX); 324 325 return aggr_limit; 326 } 327 328 void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status) 329 { 330 struct ath_hw *ah = sc->sc_ah; 331 332 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 333 if (status & ATH9K_INT_GENTIMER) 334 ath_gen_timer_isr(sc->sc_ah); 335 336 if (status & ATH9K_INT_MCI) 337 ath_mci_intr(sc); 338 } 339 340 void ath9k_start_btcoex(struct ath_softc *sc) 341 { 342 struct ath_hw *ah = sc->sc_ah; 343 344 if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) && 345 !ah->btcoex_hw.enabled) { 346 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 347 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, 348 AR_STOMP_LOW_WLAN_WGHT); 349 ath9k_hw_btcoex_enable(ah); 350 351 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 352 ath9k_btcoex_timer_resume(sc); 353 } 354 } 355 356 void ath9k_stop_btcoex(struct ath_softc *sc) 357 { 358 struct ath_hw *ah = sc->sc_ah; 359 360 if (ah->btcoex_hw.enabled && 361 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) { 362 ath9k_hw_btcoex_disable(ah); 363 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) 364 ath9k_btcoex_timer_pause(sc); 365 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_MCI) 366 ath_mci_flush_profile(&sc->btcoex.mci); 367 } 368 } 369 370 void ath9k_deinit_btcoex(struct ath_softc *sc) 371 { 372 if ((sc->btcoex.no_stomp_timer) && 373 ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_3WIRE) 374 ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer); 375 376 if (ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_MCI) 377 ath_mci_cleanup(sc); 378 } 379 380 int ath9k_init_btcoex(struct ath_softc *sc) 381 { 382 struct ath_txq *txq; 383 struct ath_hw *ah = sc->sc_ah; 384 int r; 385 386 ath9k_hw_btcoex_init_scheme(ah); 387 388 switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) { 389 case ATH_BTCOEX_CFG_NONE: 390 break; 391 case ATH_BTCOEX_CFG_2WIRE: 392 ath9k_hw_btcoex_init_2wire(sc->sc_ah); 393 break; 394 case ATH_BTCOEX_CFG_3WIRE: 395 ath9k_hw_btcoex_init_3wire(sc->sc_ah); 396 r = ath_init_btcoex_timer(sc); 397 if (r) 398 return -1; 399 txq = sc->tx.txq_map[WME_AC_BE]; 400 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum); 401 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW; 402 break; 403 case ATH_BTCOEX_CFG_MCI: 404 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW; 405 sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE; 406 INIT_LIST_HEAD(&sc->btcoex.mci.info); 407 408 r = ath_mci_setup(sc); 409 if (r) 410 return r; 411 412 ath9k_hw_btcoex_init_mci(ah); 413 414 break; 415 default: 416 WARN_ON(1); 417 break; 418 } 419 420 return 0; 421 } 422 423 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */ 424