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 /******************/ 114 /* BTCOEX */ 115 /******************/ 116 117 /* 118 * Detects if there is any priority bt traffic 119 */ 120 static void ath_detect_bt_priority(struct ath_softc *sc) 121 { 122 struct ath_btcoex *btcoex = &sc->btcoex; 123 struct ath_hw *ah = sc->sc_ah; 124 125 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio)) 126 btcoex->bt_priority_cnt++; 127 128 if (time_after(jiffies, btcoex->bt_priority_time + 129 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { 130 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 131 /* Detect if colocated bt started scanning */ 132 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 133 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 134 "BT scan detected\n"); 135 sc->sc_flags |= (SC_OP_BT_SCAN | 136 SC_OP_BT_PRIORITY_DETECTED); 137 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 138 ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, 139 "BT priority traffic detected\n"); 140 sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED; 141 } 142 143 btcoex->bt_priority_cnt = 0; 144 btcoex->bt_priority_time = jiffies; 145 } 146 } 147 148 static void ath9k_gen_timer_start(struct ath_hw *ah, 149 struct ath_gen_timer *timer, 150 u32 trig_timeout, 151 u32 timer_period) 152 { 153 ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period); 154 155 if ((ah->imask & ATH9K_INT_GENTIMER) == 0) { 156 ath9k_hw_disable_interrupts(ah); 157 ah->imask |= ATH9K_INT_GENTIMER; 158 ath9k_hw_set_interrupts(ah); 159 ath9k_hw_enable_interrupts(ah); 160 } 161 } 162 163 static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer) 164 { 165 struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers; 166 167 ath9k_hw_gen_timer_stop(ah, timer); 168 169 /* if no timer is enabled, turn off interrupt mask */ 170 if (timer_table->timer_mask.val == 0) { 171 ath9k_hw_disable_interrupts(ah); 172 ah->imask &= ~ATH9K_INT_GENTIMER; 173 ath9k_hw_set_interrupts(ah); 174 ath9k_hw_enable_interrupts(ah); 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 u32 timer_period; 189 bool is_btscan; 190 191 ath9k_ps_wakeup(sc); 192 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) 193 ath_detect_bt_priority(sc); 194 is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 195 196 spin_lock_bh(&btcoex->btcoex_lock); 197 198 ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL : 199 btcoex->bt_stomp_type); 200 201 ath9k_hw_btcoex_enable(ah); 202 spin_unlock_bh(&btcoex->btcoex_lock); 203 204 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) { 205 if (btcoex->hw_timer_enabled) 206 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 207 208 timer_period = is_btscan ? btcoex->btscan_no_stomp : 209 btcoex->btcoex_no_stomp; 210 ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period, 211 timer_period * 10); 212 btcoex->hw_timer_enabled = true; 213 } 214 215 ath9k_ps_restore(sc); 216 timer_period = btcoex->btcoex_period / 1000; 217 mod_timer(&btcoex->period_timer, jiffies + 218 msecs_to_jiffies(timer_period)); 219 } 220 221 /* 222 * Generic tsf based hw timer which configures weight 223 * registers to time slice between wlan and bt traffic 224 */ 225 static void ath_btcoex_no_stomp_timer(void *arg) 226 { 227 struct ath_softc *sc = (struct ath_softc *)arg; 228 struct ath_hw *ah = sc->sc_ah; 229 struct ath_btcoex *btcoex = &sc->btcoex; 230 struct ath_common *common = ath9k_hw_common(ah); 231 bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 232 233 ath_dbg(common, BTCOEX, "no stomp timer running\n"); 234 235 ath9k_ps_wakeup(sc); 236 spin_lock_bh(&btcoex->btcoex_lock); 237 238 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) 239 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 240 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 241 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); 242 243 ath9k_hw_btcoex_enable(ah); 244 spin_unlock_bh(&btcoex->btcoex_lock); 245 ath9k_ps_restore(sc); 246 } 247 248 int ath_init_btcoex_timer(struct ath_softc *sc) 249 { 250 struct ath_btcoex *btcoex = &sc->btcoex; 251 252 if (ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_NONE) 253 return 0; 254 255 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000; 256 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 257 btcoex->btcoex_period / 100; 258 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 259 btcoex->btcoex_period / 100; 260 261 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer, 262 (unsigned long) sc); 263 264 spin_lock_init(&btcoex->btcoex_lock); 265 266 btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah, 267 ath_btcoex_no_stomp_timer, 268 ath_btcoex_no_stomp_timer, 269 (void *) sc, AR_FIRST_NDP_TIMER); 270 271 if (!btcoex->no_stomp_timer) 272 return -ENOMEM; 273 274 return 0; 275 } 276 277 /* 278 * (Re)start btcoex timers 279 */ 280 void ath9k_btcoex_timer_resume(struct ath_softc *sc) 281 { 282 struct ath_btcoex *btcoex = &sc->btcoex; 283 struct ath_hw *ah = sc->sc_ah; 284 285 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n"); 286 287 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE) 288 return; 289 290 /* make sure duty cycle timer is also stopped when resuming */ 291 if (btcoex->hw_timer_enabled) 292 ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer); 293 294 btcoex->bt_priority_cnt = 0; 295 btcoex->bt_priority_time = jiffies; 296 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 297 298 mod_timer(&btcoex->period_timer, jiffies); 299 } 300 301 302 /* 303 * Pause btcoex timer and bt duty cycle timer 304 */ 305 void ath9k_btcoex_timer_pause(struct ath_softc *sc) 306 { 307 struct ath_btcoex *btcoex = &sc->btcoex; 308 struct ath_hw *ah = sc->sc_ah; 309 310 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE) 311 return; 312 313 del_timer_sync(&btcoex->period_timer); 314 315 if (btcoex->hw_timer_enabled) 316 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 317 318 btcoex->hw_timer_enabled = false; 319 } 320