| 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 | bool is_blocked; |
| 232 | |
| 233 | ath9k_htc_ps_wakeup(priv); |
| 234 | is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) == |
| 235 | priv->ah->rfkill_polarity; |
| 236 | ath9k_htc_ps_restore(priv); |
| 237 | |
| 238 | return is_blocked; |
| 239 | } |
| 240 | |
| 241 | void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw) |
| 242 | { |
| 243 | struct ath9k_htc_priv *priv = hw->priv; |
| 244 | bool blocked = !!ath_is_rfkill_set(priv); |
| 245 | |
| 246 | wiphy_rfkill_set_hw_state(hw->wiphy, blocked); |
| 247 | } |
| 248 | |
| 249 | void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv) |
| 250 | { |
| 251 | if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) |
| 252 | wiphy_rfkill_start_polling(priv->hw->wiphy); |
| 253 | } |
| 254 | |
| 255 | void ath9k_htc_radio_enable(struct ieee80211_hw *hw) |
| 256 | { |
| 257 | struct ath9k_htc_priv *priv = hw->priv; |
| 258 | struct ath_hw *ah = priv->ah; |
| 259 | struct ath_common *common = ath9k_hw_common(ah); |
| 260 | int ret; |
| 261 | u8 cmd_rsp; |
| 262 | |
| 263 | if (!ah->curchan) |
| 264 | ah->curchan = ath9k_cmn_get_curchannel(hw, ah); |
| 265 | |
| 266 | /* Reset the HW */ |
| 267 | ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); |
| 268 | if (ret) { |
| 269 | ath_err(common, |
| 270 | "Unable to reset hardware; reset status %d (freq %u MHz)\n", |
| 271 | ret, ah->curchan->channel); |
| 272 | } |
| 273 | |
| 274 | ath9k_cmn_update_txpow(ah, priv->curtxpow, priv->txpowlimit, |
| 275 | &priv->curtxpow); |
| 276 | |
| 277 | /* Start RX */ |
| 278 | WMI_CMD(WMI_START_RECV_CMDID); |
| 279 | ath9k_host_rx_init(priv); |
| 280 | |
| 281 | /* Start TX */ |
| 282 | htc_start(priv->htc); |
| 283 | spin_lock_bh(&priv->tx.tx_lock); |
| 284 | priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP; |
| 285 | spin_unlock_bh(&priv->tx.tx_lock); |
| 286 | ieee80211_wake_queues(hw); |
| 287 | |
| 288 | WMI_CMD(WMI_ENABLE_INTR_CMDID); |
| 289 | |
| 290 | /* Enable LED */ |
| 291 | ath9k_hw_cfg_output(ah, ah->led_pin, |
| 292 | AR_GPIO_OUTPUT_MUX_AS_OUTPUT); |
| 293 | ath9k_hw_set_gpio(ah, ah->led_pin, 0); |
| 294 | } |
| 295 | |
| 296 | void ath9k_htc_radio_disable(struct ieee80211_hw *hw) |
| 297 | { |
| 298 | struct ath9k_htc_priv *priv = hw->priv; |
| 299 | struct ath_hw *ah = priv->ah; |
| 300 | struct ath_common *common = ath9k_hw_common(ah); |
| 301 | int ret; |
| 302 | u8 cmd_rsp; |
| 303 | |
| 304 | ath9k_htc_ps_wakeup(priv); |
| 305 | |
| 306 | /* Disable LED */ |
| 307 | ath9k_hw_set_gpio(ah, ah->led_pin, 1); |
| 308 | ath9k_hw_cfg_gpio_input(ah, ah->led_pin); |
| 309 | |
| 310 | WMI_CMD(WMI_DISABLE_INTR_CMDID); |
| 311 | |
| 312 | /* Stop TX */ |
| 313 | ieee80211_stop_queues(hw); |
| 314 | ath9k_htc_tx_drain(priv); |
| 315 | WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID); |
| 316 | |
| 317 | /* Stop RX */ |
| 318 | WMI_CMD(WMI_STOP_RECV_CMDID); |
| 319 | |
| 320 | /* Clear the WMI event queue */ |
| 321 | ath9k_wmi_event_drain(priv); |
| 322 | |
| 323 | /* |
| 324 | * The MIB counters have to be disabled here, |
| 325 | * since the target doesn't do it. |
| 326 | */ |
| 327 | ath9k_hw_disable_mib_counters(ah); |
| 328 | |
| 329 | if (!ah->curchan) |
| 330 | ah->curchan = ath9k_cmn_get_curchannel(hw, ah); |
| 331 | |
| 332 | /* Reset the HW */ |
| 333 | ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); |
| 334 | if (ret) { |
| 335 | ath_err(common, |
| 336 | "Unable to reset hardware; reset status %d (freq %u MHz)\n", |
| 337 | ret, ah->curchan->channel); |
| 338 | } |
| 339 | |
| 340 | /* Disable the PHY */ |
| 341 | ath9k_hw_phy_disable(ah); |
| 342 | |
| 343 | ath9k_htc_ps_restore(priv); |
| 344 | ath9k_htc_setpower(priv, ATH9K_PM_FULL_SLEEP); |
| 345 | } |