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), 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), 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, BTCOEX, "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 ath9k_hw_btcoex_enable(priv->ah); 112 } 113 114 void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv) 115 { 116 struct ath_btcoex *btcoex = &priv->btcoex; 117 118 if (ath9k_hw_get_btcoex_scheme(priv->ah) == ATH_BTCOEX_CFG_NONE) 119 return; 120 121 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; 122 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 123 btcoex->btcoex_period / 100; 124 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 125 btcoex->btcoex_period / 100; 126 INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work); 127 INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work); 128 } 129 130 /* 131 * (Re)start btcoex work 132 */ 133 134 void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv) 135 { 136 struct ath_btcoex *btcoex = &priv->btcoex; 137 struct ath_hw *ah = priv->ah; 138 139 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE) 140 return; 141 142 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n"); 143 144 btcoex->bt_priority_cnt = 0; 145 btcoex->bt_priority_time = jiffies; 146 priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN); 147 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0); 148 } 149 150 151 /* 152 * Cancel btcoex and bt duty cycle work. 153 */ 154 void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv) 155 { 156 if (ath9k_hw_get_btcoex_scheme(priv->ah) == ATH_BTCOEX_CFG_NONE) 157 return; 158 159 cancel_delayed_work_sync(&priv->coex_period_work); 160 cancel_delayed_work_sync(&priv->duty_cycle_work); 161 } 162 163 /*******/ 164 /* LED */ 165 /*******/ 166 167 #ifdef CONFIG_MAC80211_LEDS 168 void ath9k_led_work(struct work_struct *work) 169 { 170 struct ath9k_htc_priv *priv = container_of(work, 171 struct ath9k_htc_priv, 172 led_work); 173 174 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 175 (priv->brightness == LED_OFF)); 176 } 177 178 static void ath9k_led_brightness(struct led_classdev *led_cdev, 179 enum led_brightness brightness) 180 { 181 struct ath9k_htc_priv *priv = container_of(led_cdev, 182 struct ath9k_htc_priv, 183 led_cdev); 184 185 /* Not locked, but it's just a tiny green light..*/ 186 priv->brightness = brightness; 187 ieee80211_queue_work(priv->hw, &priv->led_work); 188 } 189 190 void ath9k_deinit_leds(struct ath9k_htc_priv *priv) 191 { 192 if (!priv->led_registered) 193 return; 194 195 ath9k_led_brightness(&priv->led_cdev, LED_OFF); 196 led_classdev_unregister(&priv->led_cdev); 197 cancel_work_sync(&priv->led_work); 198 } 199 200 void ath9k_init_leds(struct ath9k_htc_priv *priv) 201 { 202 int ret; 203 204 if (AR_SREV_9287(priv->ah)) 205 priv->ah->led_pin = ATH_LED_PIN_9287; 206 else if (AR_SREV_9271(priv->ah)) 207 priv->ah->led_pin = ATH_LED_PIN_9271; 208 else if (AR_DEVID_7010(priv->ah)) 209 priv->ah->led_pin = ATH_LED_PIN_7010; 210 else 211 priv->ah->led_pin = ATH_LED_PIN_DEF; 212 213 /* Configure gpio 1 for output */ 214 ath9k_hw_cfg_output(priv->ah, priv->ah->led_pin, 215 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 216 /* LED off, active low */ 217 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1); 218 219 snprintf(priv->led_name, sizeof(priv->led_name), 220 "ath9k_htc-%s", wiphy_name(priv->hw->wiphy)); 221 priv->led_cdev.name = priv->led_name; 222 priv->led_cdev.brightness_set = ath9k_led_brightness; 223 224 ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev); 225 if (ret < 0) 226 return; 227 228 INIT_WORK(&priv->led_work, ath9k_led_work); 229 priv->led_registered = true; 230 231 return; 232 } 233 #endif 234 235 /*******************/ 236 /* Rfkill */ 237 /*******************/ 238 239 static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv) 240 { 241 bool is_blocked; 242 243 ath9k_htc_ps_wakeup(priv); 244 is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) == 245 priv->ah->rfkill_polarity; 246 ath9k_htc_ps_restore(priv); 247 248 return is_blocked; 249 } 250 251 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw) 252 { 253 struct ath9k_htc_priv *priv = hw->priv; 254 bool blocked = !!ath_is_rfkill_set(priv); 255 256 wiphy_rfkill_set_hw_state(hw->wiphy, blocked); 257 } 258 259 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv) 260 { 261 if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) 262 wiphy_rfkill_start_polling(priv->hw->wiphy); 263 } 264 265 void ath9k_htc_radio_enable(struct ieee80211_hw *hw) 266 { 267 struct ath9k_htc_priv *priv = hw->priv; 268 struct ath_hw *ah = priv->ah; 269 struct ath_common *common = ath9k_hw_common(ah); 270 int ret; 271 u8 cmd_rsp; 272 273 if (!ah->curchan) 274 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 275 276 /* Reset the HW */ 277 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 278 if (ret) { 279 ath_err(common, 280 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 281 ret, ah->curchan->channel); 282 } 283 284 ath9k_cmn_update_txpow(ah, priv->curtxpow, priv->txpowlimit, 285 &priv->curtxpow); 286 287 /* Start RX */ 288 WMI_CMD(WMI_START_RECV_CMDID); 289 ath9k_host_rx_init(priv); 290 291 /* Start TX */ 292 htc_start(priv->htc); 293 spin_lock_bh(&priv->tx.tx_lock); 294 priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP; 295 spin_unlock_bh(&priv->tx.tx_lock); 296 ieee80211_wake_queues(hw); 297 298 WMI_CMD(WMI_ENABLE_INTR_CMDID); 299 300 /* Enable LED */ 301 ath9k_hw_cfg_output(ah, ah->led_pin, 302 AR_GPIO_OUTPUT_MUX_AS_OUTPUT); 303 ath9k_hw_set_gpio(ah, ah->led_pin, 0); 304 } 305 306 void ath9k_htc_radio_disable(struct ieee80211_hw *hw) 307 { 308 struct ath9k_htc_priv *priv = hw->priv; 309 struct ath_hw *ah = priv->ah; 310 struct ath_common *common = ath9k_hw_common(ah); 311 int ret; 312 u8 cmd_rsp; 313 314 ath9k_htc_ps_wakeup(priv); 315 316 /* Disable LED */ 317 ath9k_hw_set_gpio(ah, ah->led_pin, 1); 318 ath9k_hw_cfg_gpio_input(ah, ah->led_pin); 319 320 WMI_CMD(WMI_DISABLE_INTR_CMDID); 321 322 /* Stop TX */ 323 ieee80211_stop_queues(hw); 324 ath9k_htc_tx_drain(priv); 325 WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID); 326 327 /* Stop RX */ 328 WMI_CMD(WMI_STOP_RECV_CMDID); 329 330 /* Clear the WMI event queue */ 331 ath9k_wmi_event_drain(priv); 332 333 /* 334 * The MIB counters have to be disabled here, 335 * since the target doesn't do it. 336 */ 337 ath9k_hw_disable_mib_counters(ah); 338 339 if (!ah->curchan) 340 ah->curchan = ath9k_cmn_get_curchannel(hw, ah); 341 342 /* Reset the HW */ 343 ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); 344 if (ret) { 345 ath_err(common, 346 "Unable to reset hardware; reset status %d (freq %u MHz)\n", 347 ret, ah->curchan->channel); 348 } 349 350 /* Disable the PHY */ 351 ath9k_hw_phy_disable(ah); 352 353 ath9k_htc_ps_restore(priv); 354 ath9k_htc_setpower(priv, ATH9K_PM_FULL_SLEEP); 355 } 356