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 52 sc->sc_ah->led_pin = ATH_LED_PIN_DEF; 53 } 54 55 /* Configure gpio 1 for output */ 56 ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin, 57 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 58 /* LED off, active low */ 59 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1); 60 61 if (!led_blink) 62 sc->led_cdev.default_trigger = 63 ieee80211_get_radio_led_name(sc->hw); 64 65 snprintf(sc->led_name, sizeof(sc->led_name), 66 "ath9k-%s", wiphy_name(sc->hw->wiphy)); 67 sc->led_cdev.name = sc->led_name; 68 sc->led_cdev.brightness_set = ath_led_brightness; 69 70 ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev); 71 if (ret < 0) 72 return; 73 74 sc->led_registered = true; 75 } 76 #endif 77 78 /*******************/ 79 /* Rfkill */ 80 /*******************/ 81 82 static bool ath_is_rfkill_set(struct ath_softc *sc) 83 { 84 struct ath_hw *ah = sc->sc_ah; 85 86 return ath9k_hw_gpio_get(ah, ah->rfkill_gpio) == 87 ah->rfkill_polarity; 88 } 89 90 void ath9k_rfkill_poll_state(struct ieee80211_hw *hw) 91 { 92 struct ath_softc *sc = hw->priv; 93 bool blocked = !!ath_is_rfkill_set(sc); 94 95 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 96 } 97 98 void ath_start_rfkill_poll(struct ath_softc *sc) 99 { 100 struct ath_hw *ah = sc->sc_ah; 101 102 if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 103 wiphy_rfkill_start_polling(sc->hw->wiphy); 104 } 105 106 /******************/ 107 /* BTCOEX */ 108 /******************/ 109 110 /* 111 * Detects if there is any priority bt traffic 112 */ 113 static void ath_detect_bt_priority(struct ath_softc *sc) 114 { 115 struct ath_btcoex *btcoex = &sc->btcoex; 116 struct ath_hw *ah = sc->sc_ah; 117 118 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio)) 119 btcoex->bt_priority_cnt++; 120 121 if (time_after(jiffies, btcoex->bt_priority_time + 122 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { 123 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 124 /* Detect if colocated bt started scanning */ 125 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 126 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX, 127 "BT scan detected\n"); 128 sc->sc_flags |= (SC_OP_BT_SCAN | 129 SC_OP_BT_PRIORITY_DETECTED); 130 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 131 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX, 132 "BT priority traffic detected\n"); 133 sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED; 134 } 135 136 btcoex->bt_priority_cnt = 0; 137 btcoex->bt_priority_time = jiffies; 138 } 139 } 140 141 static void ath9k_gen_timer_start(struct ath_hw *ah, 142 struct ath_gen_timer *timer, 143 u32 trig_timeout, 144 u32 timer_period) 145 { 146 ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period); 147 148 if ((ah->imask & ATH9K_INT_GENTIMER) == 0) { 149 ath9k_hw_disable_interrupts(ah); 150 ah->imask |= ATH9K_INT_GENTIMER; 151 ath9k_hw_set_interrupts(ah, ah->imask); 152 } 153 } 154 155 static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer) 156 { 157 struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers; 158 159 ath9k_hw_gen_timer_stop(ah, timer); 160 161 /* if no timer is enabled, turn off interrupt mask */ 162 if (timer_table->timer_mask.val == 0) { 163 ath9k_hw_disable_interrupts(ah); 164 ah->imask &= ~ATH9K_INT_GENTIMER; 165 ath9k_hw_set_interrupts(ah, ah->imask); 166 } 167 } 168 169 /* 170 * This is the master bt coex timer which runs for every 171 * 45ms, bt traffic will be given priority during 55% of this 172 * period while wlan gets remaining 45% 173 */ 174 static void ath_btcoex_period_timer(unsigned long data) 175 { 176 struct ath_softc *sc = (struct ath_softc *) data; 177 struct ath_hw *ah = sc->sc_ah; 178 struct ath_btcoex *btcoex = &sc->btcoex; 179 u32 timer_period; 180 bool is_btscan; 181 182 ath9k_ps_wakeup(sc); 183 ath_detect_bt_priority(sc); 184 185 is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 186 187 spin_lock_bh(&btcoex->btcoex_lock); 188 189 ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL : 190 btcoex->bt_stomp_type); 191 192 spin_unlock_bh(&btcoex->btcoex_lock); 193 194 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) { 195 if (btcoex->hw_timer_enabled) 196 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 197 198 timer_period = is_btscan ? btcoex->btscan_no_stomp : 199 btcoex->btcoex_no_stomp; 200 ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period, 201 timer_period * 10); 202 btcoex->hw_timer_enabled = true; 203 } 204 205 ath9k_ps_restore(sc); 206 mod_timer(&btcoex->period_timer, jiffies + 207 msecs_to_jiffies(ATH_BTCOEX_DEF_BT_PERIOD)); 208 } 209 210 /* 211 * Generic tsf based hw timer which configures weight 212 * registers to time slice between wlan and bt traffic 213 */ 214 static void ath_btcoex_no_stomp_timer(void *arg) 215 { 216 struct ath_softc *sc = (struct ath_softc *)arg; 217 struct ath_hw *ah = sc->sc_ah; 218 struct ath_btcoex *btcoex = &sc->btcoex; 219 struct ath_common *common = ath9k_hw_common(ah); 220 bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN; 221 222 ath_dbg(common, ATH_DBG_BTCOEX, 223 "no stomp timer running\n"); 224 225 ath9k_ps_wakeup(sc); 226 spin_lock_bh(&btcoex->btcoex_lock); 227 228 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) 229 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 230 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 231 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); 232 233 spin_unlock_bh(&btcoex->btcoex_lock); 234 ath9k_ps_restore(sc); 235 } 236 237 int ath_init_btcoex_timer(struct ath_softc *sc) 238 { 239 struct ath_btcoex *btcoex = &sc->btcoex; 240 241 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000; 242 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 243 btcoex->btcoex_period / 100; 244 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 245 btcoex->btcoex_period / 100; 246 247 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer, 248 (unsigned long) sc); 249 250 spin_lock_init(&btcoex->btcoex_lock); 251 252 btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah, 253 ath_btcoex_no_stomp_timer, 254 ath_btcoex_no_stomp_timer, 255 (void *) sc, AR_FIRST_NDP_TIMER); 256 257 if (!btcoex->no_stomp_timer) 258 return -ENOMEM; 259 260 return 0; 261 } 262 263 /* 264 * (Re)start btcoex timers 265 */ 266 void ath9k_btcoex_timer_resume(struct ath_softc *sc) 267 { 268 struct ath_btcoex *btcoex = &sc->btcoex; 269 struct ath_hw *ah = sc->sc_ah; 270 271 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, 272 "Starting btcoex timers\n"); 273 274 /* make sure duty cycle timer is also stopped when resuming */ 275 if (btcoex->hw_timer_enabled) 276 ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer); 277 278 btcoex->bt_priority_cnt = 0; 279 btcoex->bt_priority_time = jiffies; 280 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN); 281 282 mod_timer(&btcoex->period_timer, jiffies); 283 } 284 285 286 /* 287 * Pause btcoex timer and bt duty cycle timer 288 */ 289 void ath9k_btcoex_timer_pause(struct ath_softc *sc) 290 { 291 struct ath_btcoex *btcoex = &sc->btcoex; 292 struct ath_hw *ah = sc->sc_ah; 293 294 del_timer_sync(&btcoex->period_timer); 295 296 if (btcoex->hw_timer_enabled) 297 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer); 298 299 btcoex->hw_timer_enabled = false; 300 } 301