1 /* 2 * Copyright (c) 2010-2011 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 "htc.h" 18 19 /******************/ 20 /* BTCOEX */ 21 /******************/ 22 23 /* 24 * Detects if there is any priority bt traffic 25 */ 26 static void ath_detect_bt_priority(struct ath9k_htc_priv *priv) 27 { 28 struct ath_btcoex *btcoex = &priv->btcoex; 29 struct ath_hw *ah = priv->ah; 30 31 if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio)) 32 btcoex->bt_priority_cnt++; 33 34 if (time_after(jiffies, btcoex->bt_priority_time + 35 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { 36 priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); 37 /* Detect if colocated bt started scanning */ 38 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { 39 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, 40 "BT scan detected\n"); 41 priv->op_flags |= (OP_BT_SCAN | 42 OP_BT_PRIORITY_DETECTED); 43 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { 44 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, 45 "BT priority traffic detected\n"); 46 priv->op_flags |= OP_BT_PRIORITY_DETECTED; 47 } 48 49 btcoex->bt_priority_cnt = 0; 50 btcoex->bt_priority_time = jiffies; 51 } 52 } 53 54 /* 55 * This is the master bt coex work which runs for every 56 * 45ms, bt traffic will be given priority during 55% of this 57 * period while wlan gets remaining 45% 58 */ 59 static void ath_btcoex_period_work(struct work_struct *work) 60 { 61 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, 62 coex_period_work.work); 63 struct ath_btcoex *btcoex = &priv->btcoex; 64 struct ath_common *common = ath9k_hw_common(priv->ah); 65 u32 timer_period; 66 bool is_btscan; 67 int ret; 68 69 ath_detect_bt_priority(priv); 70 71 is_btscan = !!(priv->op_flags & OP_BT_SCAN); 72 73 ret = ath9k_htc_update_cap_target(priv, 74 !!(priv->op_flags & OP_BT_PRIORITY_DETECTED)); 75 if (ret) { 76 ath_err(common, "Unable to set BTCOEX parameters\n"); 77 return; 78 } 79 80 ath9k_hw_btcoex_bt_stomp(priv->ah, is_btscan ? ATH_BTCOEX_STOMP_ALL : 81 btcoex->bt_stomp_type); 82 83 ath9k_hw_btcoex_enable(priv->ah); 84 timer_period = is_btscan ? btcoex->btscan_no_stomp : 85 btcoex->btcoex_no_stomp; 86 ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work, 87 msecs_to_jiffies(timer_period)); 88 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 89 msecs_to_jiffies(btcoex->btcoex_period)); 90 } 91 92 /* 93 * Work to time slice between wlan and bt traffic and 94 * configure weight registers 95 */ 96 static void ath_btcoex_duty_cycle_work(struct work_struct *work) 97 { 98 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, 99 duty_cycle_work.work); 100 struct ath_hw *ah = priv->ah; 101 struct ath_btcoex *btcoex = &priv->btcoex; 102 struct ath_common *common = ath9k_hw_common(ah); 103 bool is_btscan = priv->op_flags & OP_BT_SCAN; 104 105 ath_dbg(common, ATH_DBG_BTCOEX, 106 "time slice work for bt and wlan\n"); 107 108 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan) 109 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); 110 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) 111 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); 112 ath9k_hw_btcoex_enable(priv->ah); 113 } 114 115 void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv) 116 { 117 struct ath_btcoex *btcoex = &priv->btcoex; 118 119 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; 120 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 121 btcoex->btcoex_period / 100; 122 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 123 btcoex->btcoex_period / 100; 124 INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work); 125 INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work); 126 } 127 128 /* 129 * (Re)start btcoex work 130 */ 131 132 void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv) 133 { 134 struct ath_btcoex *btcoex = &priv->btcoex; 135 struct ath_hw *ah = priv->ah; 136 137 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX, "Starting btcoex work\n"); 138 139 btcoex->bt_priority_cnt = 0; 140 btcoex->bt_priority_time = jiffies; 141 priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); 142 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0); 143 } 144 145 146 /* 147 * Cancel btcoex and bt duty cycle work. 148 */ 149 void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv) 150 { 151 cancel_delayed_work_sync(&priv->coex_period_work); 152 cancel_delayed_work_sync(&priv->duty_cycle_work); 153 } 154 155 /*******/ 156 /* LED */ 157 /*******/ 158 159 #ifdef CONFIG_MAC80211_LEDS 160 void ath9k_led_work(struct work_struct *work) 161 { 162 struct ath9k_htc_priv *priv = container_of(work, 163 struct ath9k_htc_priv, 164 led_work); 165 166 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 167 (priv->brightness == LED_OFF)); 168 } 169 170 static void ath9k_led_brightness(struct led_classdev *led_cdev, 171 enum led_brightness brightness) 172 { 173 struct ath9k_htc_priv *priv = container_of(led_cdev, 174 struct ath9k_htc_priv, 175 led_cdev); 176 177 /* Not locked, but it's just a tiny green light..*/ 178 priv->brightness = brightness; 179 ieee80211_queue_work(priv->hw, &priv->led_work); 180 } 181 182 void ath9k_deinit_leds(struct ath9k_htc_priv *priv) 183 { 184 if (!priv->led_registered) 185 return; 186 187 ath9k_led_brightness(&priv->led_cdev, LED_OFF); 188 led_classdev_unregister(&priv->led_cdev); 189 cancel_work_sync(&priv->led_work); 190 } 191 192 void ath9k_init_leds(struct ath9k_htc_priv *priv) 193 { 194 int ret; 195 196 if (AR_SREV_9287(priv->ah)) 197 priv->ah->led_pin = ATH_LED_PIN_9287; 198 else if (AR_SREV_9271(priv->ah)) 199 priv->ah->led_pin = ATH_LED_PIN_9271; 200 else if (AR_DEVID_7010(priv->ah)) 201 priv->ah->led_pin = ATH_LED_PIN_7010; 202 else 203 priv->ah->led_pin = ATH_LED_PIN_DEF; 204 205 /* Configure gpio 1 for output */ 206 ath9k_hw_cfg_output(priv->ah, priv->ah->led_pin, 207 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 208 /* LED off, active low */ 209 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1); 210 211 snprintf(priv->led_name, sizeof(priv->led_name), 212 "ath9k_htc-%s", wiphy_name(priv->hw->wiphy)); 213 priv->led_cdev.name = priv->led_name; 214 priv->led_cdev.brightness_set = ath9k_led_brightness; 215 216 ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev); 217 if (ret < 0) 218 return; 219 220 INIT_WORK(&priv->led_work, ath9k_led_work); 221 priv->led_registered = true; 222 223 return; 224 } 225 #endif 226 227 /*******************/ 228 /* Rfkill */ 229 /*******************/ 230 231 static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv) 232 { 233 bool is_blocked; 234 235 ath9k_htc_ps_wakeup(priv); 236 is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) == 237 priv->ah->rfkill_polarity; 238 ath9k_htc_ps_restore(priv); 239 240 return is_blocked; 241 } 242 243 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw) 244 { 245 struct ath9k_htc_priv *priv = hw->priv; 246 bool blocked = !!ath_is_rfkill_set(priv); 247 248 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 249 } 250 251 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv) 252 { 253 if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 254 wiphy_rfkill_start_polling(priv->hw->wiphy); 255 } 256 257 void ath9k_htc_radio_enable(struct ieee80211_hw *hw) 258 { 259 struct ath9k_htc_priv *priv = hw->priv; 260 struct ath_hw *ah = priv->ah; 261 struct ath_common *common = ath9k_hw_common(ah); 262 int ret; 263 u8 cmd_rsp; 264 265 if (!ah->curchan) 266 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 267 268 /* Reset the HW */ 269 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 270 if (ret) { 271 ath_err(common, 272 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 273 ret, ah->curchan->channel); 274 } 275 276 ath9k_cmn_update_txpow(ah, priv->curtxpow, priv->txpowlimit, 277 &priv->curtxpow); 278 279 /* Start RX */ 280 WMI_CMD(WMI_START_RECV_CMDID); 281 ath9k_host_rx_init(priv); 282 283 /* Start TX */ 284 htc_start(priv->htc); 285 spin_lock_bh(&priv->tx.tx_lock); 286 priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP; 287 spin_unlock_bh(&priv->tx.tx_lock); 288 ieee80211_wake_queues(hw); 289 290 WMI_CMD(WMI_ENABLE_INTR_CMDID); 291 292 /* Enable LED */ 293 ath9k_hw_cfg_output(ah, ah->led_pin, 294 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 295 ath9k_hw_set_gpio(ah, ah->led_pin, 0); 296 } 297 298 void ath9k_htc_radio_disable(struct ieee80211_hw *hw) 299 { 300 struct ath9k_htc_priv *priv = hw->priv; 301 struct ath_hw *ah = priv->ah; 302 struct ath_common *common = ath9k_hw_common(ah); 303 int ret; 304 u8 cmd_rsp; 305 306 ath9k_htc_ps_wakeup(priv); 307 308 /* Disable LED */ 309 ath9k_hw_set_gpio(ah, ah->led_pin, 1); 310 ath9k_hw_cfg_gpio_input(ah, ah->led_pin); 311 312 WMI_CMD(WMI_DISABLE_INTR_CMDID); 313 314 /* Stop TX */ 315 ieee80211_stop_queues(hw); 316 ath9k_htc_tx_drain(priv); 317 WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID); 318 319 /* Stop RX */ 320 WMI_CMD(WMI_STOP_RECV_CMDID); 321 322 /* Clear the WMI event queue */ 323 ath9k_wmi_event_drain(priv); 324 325 /* 326 * The MIB counters have to be disabled here, 327 * since the target doesn't do it. 328 */ 329 ath9k_hw_disable_mib_counters(ah); 330 331 if (!ah->curchan) 332 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 333 334 /* Reset the HW */ 335 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 336 if (ret) { 337 ath_err(common, 338 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 339 ret, ah->curchan->channel); 340 } 341 342 /* Disable the PHY */ 343 ath9k_hw_phy_disable(ah); 344 345 ath9k_htc_ps_restore(priv); 346 ath9k_htc_setpower(priv, ATH9K_PM_FULL_SLEEP); 347 } 348