diff options
author | Dominik Sliwa <dominik.sliwa@toradex.com> | 2019-03-04 12:01:54 +0100 |
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committer | Dominik Sliwa <dominik.sliwa@toradex.com> | 2019-03-04 12:01:54 +0100 |
commit | 348fa3f6871f56a37dcd16c99ca98118c6d79a38 (patch) | |
tree | 6fcae7785bae4ffb838fd6549f7d01ba6abf0763 /drivers/net/wireless/ath/ath9k/htc_drv_gpio.c |
Backports v4.19.24
Backports generated by toradex backports 515a1fa55cda2b1d952872e1786857481bd54fcc
against mainline kernel tag v4.19.24
Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/htc_drv_gpio.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/htc_drv_gpio.c | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c new file mode 100644 index 0000000..6fab716 --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c @@ -0,0 +1,334 @@ +/* + * Copyright (c) 2010-2011 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "htc.h" + +/******************/ +/* BTCOEX */ +/******************/ + +#define ATH_HTC_BTCOEX_PRODUCT_ID "wb193" + +#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT + +/* + * Detects if there is any priority bt traffic + */ +static void ath_detect_bt_priority(struct ath9k_htc_priv *priv) +{ + struct ath_btcoex *btcoex = &priv->btcoex; + struct ath_hw *ah = priv->ah; + + if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio)) + btcoex->bt_priority_cnt++; + + if (time_after(jiffies, btcoex->bt_priority_time + + msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) { + clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags); + clear_bit(OP_BT_SCAN, &priv->op_flags); + /* Detect if colocated bt started scanning */ + if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { + ath_dbg(ath9k_hw_common(ah), BTCOEX, + "BT scan detected\n"); + set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags); + set_bit(OP_BT_SCAN, &priv->op_flags); + } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { + ath_dbg(ath9k_hw_common(ah), BTCOEX, + "BT priority traffic detected\n"); + set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags); + } + + btcoex->bt_priority_cnt = 0; + btcoex->bt_priority_time = jiffies; + } +} + +/* + * This is the master bt coex work which runs for every + * 45ms, bt traffic will be given priority during 55% of this + * period while wlan gets remaining 45% + */ +static void ath_btcoex_period_work(struct work_struct *work) +{ + struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, + coex_period_work.work); + struct ath_btcoex *btcoex = &priv->btcoex; + struct ath_common *common = ath9k_hw_common(priv->ah); + u32 timer_period; + int ret; + + ath_detect_bt_priority(priv); + + ret = ath9k_htc_update_cap_target(priv, + test_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags)); + if (ret) { + ath_err(common, "Unable to set BTCOEX parameters\n"); + return; + } + + ath9k_hw_btcoex_bt_stomp(priv->ah, test_bit(OP_BT_SCAN, &priv->op_flags) ? + ATH_BTCOEX_STOMP_ALL : btcoex->bt_stomp_type); + + ath9k_hw_btcoex_enable(priv->ah); + timer_period = test_bit(OP_BT_SCAN, &priv->op_flags) ? + btcoex->btscan_no_stomp : btcoex->btcoex_no_stomp; + ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work, + msecs_to_jiffies(timer_period)); + ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, + msecs_to_jiffies(btcoex->btcoex_period)); +} + +/* + * Work to time slice between wlan and bt traffic and + * configure weight registers + */ +static void ath_btcoex_duty_cycle_work(struct work_struct *work) +{ + struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv, + duty_cycle_work.work); + struct ath_hw *ah = priv->ah; + struct ath_btcoex *btcoex = &priv->btcoex; + struct ath_common *common = ath9k_hw_common(ah); + + ath_dbg(common, BTCOEX, "time slice work for bt and wlan\n"); + + if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || + test_bit(OP_BT_SCAN, &priv->op_flags)) + ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE); + else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL) + ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW); + + ath9k_hw_btcoex_enable(priv->ah); +} + +static void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv) +{ + struct ath_btcoex *btcoex = &priv->btcoex; + + btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD; + btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * + btcoex->btcoex_period / 100; + btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * + btcoex->btcoex_period / 100; + INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work); + INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work); +} + +/* + * (Re)start btcoex work + */ + +static void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv) +{ + struct ath_btcoex *btcoex = &priv->btcoex; + struct ath_hw *ah = priv->ah; + + ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n"); + + btcoex->bt_priority_cnt = 0; + btcoex->bt_priority_time = jiffies; + clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags); + clear_bit(OP_BT_SCAN, &priv->op_flags); + ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0); +} + + +/* + * Cancel btcoex and bt duty cycle work. + */ +static void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv) +{ + cancel_delayed_work_sync(&priv->coex_period_work); + cancel_delayed_work_sync(&priv->duty_cycle_work); +} + +void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv) +{ + struct ath_hw *ah = priv->ah; + + if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) { + ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, + AR_STOMP_LOW_WLAN_WGHT, 0); + ath9k_hw_btcoex_enable(ah); + ath_htc_resume_btcoex_work(priv); + } +} + +void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv) +{ + struct ath_hw *ah = priv->ah; + + if (ah->btcoex_hw.enabled && + ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) { + if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE) + ath_htc_cancel_btcoex_work(priv); + ath9k_hw_btcoex_disable(ah); + } +} + +void ath9k_htc_init_btcoex(struct ath9k_htc_priv *priv, char *product) +{ + struct ath_hw *ah = priv->ah; + struct ath_common *common = ath9k_hw_common(ah); + int qnum; + + /* + * Check if BTCOEX is globally disabled. + */ + if (!common->btcoex_enabled) { + ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_NONE; + return; + } + + if (product && strncmp(product, ATH_HTC_BTCOEX_PRODUCT_ID, 5) == 0) { + ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_3WIRE; + } + + switch (ath9k_hw_get_btcoex_scheme(priv->ah)) { + case ATH_BTCOEX_CFG_NONE: + break; + case ATH_BTCOEX_CFG_3WIRE: + priv->ah->btcoex_hw.btactive_gpio = 7; + priv->ah->btcoex_hw.btpriority_gpio = 6; + priv->ah->btcoex_hw.wlanactive_gpio = 8; + priv->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW; + ath9k_hw_btcoex_init_3wire(priv->ah); + ath_htc_init_btcoex_work(priv); + qnum = priv->hwq_map[IEEE80211_AC_BE]; + ath9k_hw_init_btcoex_hw(priv->ah, qnum); + break; + default: + WARN_ON(1); + break; + } +} + +#endif /* CPTCFG_ATH9K_BTCOEX_SUPPORT */ + +/*******/ +/* LED */ +/*******/ + +#ifdef CPTCFG_MAC80211_LEDS +void ath9k_led_work(struct work_struct *work) +{ + struct ath9k_htc_priv *priv = container_of(work, + struct ath9k_htc_priv, + led_work); + + ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, + (priv->brightness == LED_OFF)); +} + +static void ath9k_led_brightness(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct ath9k_htc_priv *priv = container_of(led_cdev, + struct ath9k_htc_priv, + led_cdev); + + /* Not locked, but it's just a tiny green light..*/ + priv->brightness = brightness; + ieee80211_queue_work(priv->hw, &priv->led_work); +} + +void ath9k_deinit_leds(struct ath9k_htc_priv *priv) +{ + if (!priv->led_registered) + return; + + ath9k_led_brightness(&priv->led_cdev, LED_OFF); + led_classdev_unregister(&priv->led_cdev); + cancel_work_sync(&priv->led_work); + + ath9k_hw_gpio_free(priv->ah, priv->ah->led_pin); +} + + +void ath9k_configure_leds(struct ath9k_htc_priv *priv) +{ + /* Configure gpio 1 for output */ + ath9k_hw_gpio_request_out(priv->ah, priv->ah->led_pin, + "ath9k-led", + AR_GPIO_OUTPUT_MUX_AS_OUTPUT); + /* LED off, active low */ + ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1); +} + +void ath9k_init_leds(struct ath9k_htc_priv *priv) +{ + int ret; + + if (AR_SREV_9287(priv->ah)) + priv->ah->led_pin = ATH_LED_PIN_9287; + else if (AR_SREV_9271(priv->ah)) + priv->ah->led_pin = ATH_LED_PIN_9271; + else if (AR_DEVID_7010(priv->ah)) + priv->ah->led_pin = ATH_LED_PIN_7010; + else + priv->ah->led_pin = ATH_LED_PIN_DEF; + + if (!ath9k_htc_led_blink) + priv->led_cdev.default_trigger = + ieee80211_get_radio_led_name(priv->hw); + + ath9k_configure_leds(priv); + + snprintf(priv->led_name, sizeof(priv->led_name), + "ath9k_htc-%s", wiphy_name(priv->hw->wiphy)); + priv->led_cdev.name = priv->led_name; + priv->led_cdev.brightness_set = ath9k_led_brightness; + + ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev); + if (ret < 0) + return; + + INIT_WORK(&priv->led_work, ath9k_led_work); + priv->led_registered = true; + + return; +} +#endif + +/*******************/ +/* Rfkill */ +/*******************/ + +static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv) +{ + bool is_blocked; + + ath9k_htc_ps_wakeup(priv); + is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) == + priv->ah->rfkill_polarity; + ath9k_htc_ps_restore(priv); + + return is_blocked; +} + +void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw) +{ + struct ath9k_htc_priv *priv = hw->priv; + bool blocked = !!ath_is_rfkill_set(priv); + + wiphy_rfkill_set_hw_state(hw->wiphy, blocked); +} + +void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv) +{ + if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) + wiphy_rfkill_start_polling(priv->hw->wiphy); +} |