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