diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/gpio.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/gpio.c | 521 |
1 files changed, 521 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/gpio.c b/drivers/net/wireless/ath/ath9k/gpio.c new file mode 100644 index 0000000..581f560 --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/gpio.c @@ -0,0 +1,521 @@ +/* + * Copyright (c) 2008-2011 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 "ath9k.h" + +/********************************/ +/* LED functions */ +/********************************/ + +#ifdef CPTCFG_MAC80211_LEDS + +static void ath_fill_led_pin(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + + /* Set default led pin if invalid */ + if (ah->led_pin < 0) { + if (AR_SREV_9287(ah)) + ah->led_pin = ATH_LED_PIN_9287; + else if (AR_SREV_9485(ah)) + ah->led_pin = ATH_LED_PIN_9485; + else if (AR_SREV_9300(ah)) + ah->led_pin = ATH_LED_PIN_9300; + else if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) + ah->led_pin = ATH_LED_PIN_9462; + else + ah->led_pin = ATH_LED_PIN_DEF; + } + + /* Configure gpio for output */ + ath9k_hw_gpio_request_out(ah, ah->led_pin, "ath9k-led", + AR_GPIO_OUTPUT_MUX_AS_OUTPUT); + + /* LED off, active low */ + ath9k_hw_set_gpio(ah, ah->led_pin, ah->config.led_active_high ? 0 : 1); +} + +static void ath_led_brightness(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev); + u32 val = (brightness == LED_OFF); + + if (sc->sc_ah->config.led_active_high) + val = !val; + + ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, val); +} + +void ath_deinit_leds(struct ath_softc *sc) +{ + if (!sc->led_registered) + return; + + ath_led_brightness(&sc->led_cdev, LED_OFF); + led_classdev_unregister(&sc->led_cdev); + + ath9k_hw_gpio_free(sc->sc_ah, sc->sc_ah->led_pin); +} + +void ath_init_leds(struct ath_softc *sc) +{ + int ret; + + if (AR_SREV_9100(sc->sc_ah)) + return; + + ath_fill_led_pin(sc); + + if (!ath9k_led_blink) + sc->led_cdev.default_trigger = + ieee80211_get_radio_led_name(sc->hw); + + snprintf(sc->led_name, sizeof(sc->led_name), + "ath9k-%s", wiphy_name(sc->hw->wiphy)); + sc->led_cdev.name = sc->led_name; + sc->led_cdev.brightness_set = ath_led_brightness; + + ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev); + if (ret < 0) + return; + + sc->led_registered = true; +} +#endif + +/*******************/ +/* Rfkill */ +/*******************/ + +static bool ath_is_rfkill_set(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + bool is_blocked; + + ath9k_ps_wakeup(sc); + is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) == + ah->rfkill_polarity; + ath9k_ps_restore(sc); + + return is_blocked; +} + +void ath9k_rfkill_poll_state(struct ieee80211_hw *hw) +{ + struct ath_softc *sc = hw->priv; + bool blocked = !!ath_is_rfkill_set(sc); + + wiphy_rfkill_set_hw_state(hw->wiphy, blocked); +} + +void ath_start_rfkill_poll(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + + if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT) + wiphy_rfkill_start_polling(sc->hw->wiphy); +} + +#ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT + +/******************/ +/* BTCOEX */ +/******************/ + +/* + * Detects if there is any priority bt traffic + */ +static void ath_detect_bt_priority(struct ath_softc *sc) +{ + struct ath_btcoex *btcoex = &sc->btcoex; + struct ath_hw *ah = sc->sc_ah; + + if (ath9k_hw_gpio_get(sc->sc_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(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); + clear_bit(BT_OP_SCAN, &btcoex->op_flags); + /* Detect if colocated bt started scanning */ + if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) { + ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, + "BT scan detected\n"); + set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); + set_bit(BT_OP_SCAN, &btcoex->op_flags); + } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) { + ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX, + "BT priority traffic detected\n"); + set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); + } + + btcoex->bt_priority_cnt = 0; + btcoex->bt_priority_time = jiffies; + } +} + +static void ath_mci_ftp_adjust(struct ath_softc *sc) +{ + struct ath_btcoex *btcoex = &sc->btcoex; + struct ath_mci_profile *mci = &btcoex->mci; + struct ath_hw *ah = sc->sc_ah; + + if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) { + if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) && + (mci->num_pan || mci->num_other_acl)) + ah->btcoex_hw.mci.stomp_ftp = + (sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH); + else + ah->btcoex_hw.mci.stomp_ftp = false; + btcoex->bt_wait_time = 0; + sc->rx.num_pkts = 0; + } +} + +/* + * This is the master bt coex timer 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_timer(unsigned long data) +{ + struct ath_softc *sc = (struct ath_softc *) data; + struct ath_hw *ah = sc->sc_ah; + struct ath_btcoex *btcoex = &sc->btcoex; + enum ath_stomp_type stomp_type; + u32 timer_period; + unsigned long flags; + + spin_lock_irqsave(&sc->sc_pm_lock, flags); + if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) { + btcoex->bt_wait_time += btcoex->btcoex_period; + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); + goto skip_hw_wakeup; + } + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); + + ath9k_ps_wakeup(sc); + spin_lock_bh(&btcoex->btcoex_lock); + + if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) { + ath9k_mci_update_rssi(sc); + ath_mci_ftp_adjust(sc); + } + + if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) + ath_detect_bt_priority(sc); + + stomp_type = btcoex->bt_stomp_type; + timer_period = btcoex->btcoex_no_stomp; + + if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) { + if (test_bit(BT_OP_SCAN, &btcoex->op_flags)) { + stomp_type = ATH_BTCOEX_STOMP_ALL; + timer_period = btcoex->btscan_no_stomp; + } + } else if (btcoex->stomp_audio >= 5) { + stomp_type = ATH_BTCOEX_STOMP_AUDIO; + btcoex->stomp_audio = 0; + } + + ath9k_hw_btcoex_bt_stomp(ah, stomp_type); + ath9k_hw_btcoex_enable(ah); + + spin_unlock_bh(&btcoex->btcoex_lock); + + if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) + mod_timer(&btcoex->no_stomp_timer, + jiffies + msecs_to_jiffies(timer_period)); + + ath9k_ps_restore(sc); + +skip_hw_wakeup: + mod_timer(&btcoex->period_timer, + jiffies + msecs_to_jiffies(btcoex->btcoex_period)); +} + +/* + * Generic tsf based hw timer which configures weight + * registers to time slice between wlan and bt traffic + */ +static void ath_btcoex_no_stomp_timer(unsigned long arg) +{ + struct ath_softc *sc = (struct ath_softc *)arg; + struct ath_hw *ah = sc->sc_ah; + struct ath_btcoex *btcoex = &sc->btcoex; + + ath9k_ps_wakeup(sc); + spin_lock_bh(&btcoex->btcoex_lock); + + if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || + (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && + test_bit(BT_OP_SCAN, &btcoex->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(ah); + spin_unlock_bh(&btcoex->btcoex_lock); + ath9k_ps_restore(sc); +} + +static void ath_init_btcoex_timer(struct ath_softc *sc) +{ + struct ath_btcoex *btcoex = &sc->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; + btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW; + + setup_timer(&btcoex->period_timer, ath_btcoex_period_timer, + (unsigned long) sc); + setup_timer(&btcoex->no_stomp_timer, ath_btcoex_no_stomp_timer, + (unsigned long) sc); + + spin_lock_init(&btcoex->btcoex_lock); +} + +/* + * (Re)start btcoex timers + */ +void ath9k_btcoex_timer_resume(struct ath_softc *sc) +{ + struct ath_btcoex *btcoex = &sc->btcoex; + struct ath_hw *ah = sc->sc_ah; + + if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_3WIRE && + ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI) + return; + + ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n"); + + /* make sure duty cycle timer is also stopped when resuming */ + del_timer_sync(&btcoex->no_stomp_timer); + + btcoex->bt_priority_cnt = 0; + btcoex->bt_priority_time = jiffies; + clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags); + clear_bit(BT_OP_SCAN, &btcoex->op_flags); + + mod_timer(&btcoex->period_timer, jiffies); +} + +/* + * Pause btcoex timer and bt duty cycle timer + */ +void ath9k_btcoex_timer_pause(struct ath_softc *sc) +{ + struct ath_btcoex *btcoex = &sc->btcoex; + struct ath_hw *ah = sc->sc_ah; + + if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_3WIRE && + ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI) + return; + + ath_dbg(ath9k_hw_common(ah), BTCOEX, "Stopping btcoex timers\n"); + + del_timer_sync(&btcoex->period_timer); + del_timer_sync(&btcoex->no_stomp_timer); +} + +void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc) +{ + struct ath_btcoex *btcoex = &sc->btcoex; + + del_timer_sync(&btcoex->no_stomp_timer); +} + +u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen) +{ + struct ath_btcoex *btcoex = &sc->btcoex; + struct ath_mci_profile *mci = &sc->btcoex.mci; + u16 aggr_limit = 0; + + if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit) + aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4; + else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags)) + aggr_limit = min((max_4ms_framelen * 3) / 8, + (u32)ATH_AMPDU_LIMIT_MAX); + + return aggr_limit; +} + +void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status) +{ + if (status & ATH9K_INT_MCI) + ath_mci_intr(sc); +} + +void ath9k_start_btcoex(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + + if (ah->btcoex_hw.enabled || + ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE) + return; + + if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) + ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, + AR_STOMP_LOW_WLAN_WGHT, 0); + else + ath9k_hw_btcoex_set_weight(ah, 0, 0, + ATH_BTCOEX_STOMP_NONE); + ath9k_hw_btcoex_enable(ah); + ath9k_btcoex_timer_resume(sc); +} + +void ath9k_stop_btcoex(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + + if (!ah->btcoex_hw.enabled || + ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE) + return; + + ath9k_btcoex_timer_pause(sc); + ath9k_hw_btcoex_disable(ah); + + if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) + ath_mci_flush_profile(&sc->btcoex.mci); +} + +void ath9k_deinit_btcoex(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + + if (ath9k_hw_mci_is_enabled(ah)) + ath_mci_cleanup(sc); + else { + enum ath_btcoex_scheme scheme = ath9k_hw_get_btcoex_scheme(ah); + + if (scheme == ATH_BTCOEX_CFG_2WIRE || + scheme == ATH_BTCOEX_CFG_3WIRE) + ath9k_hw_btcoex_deinit(sc->sc_ah); + } +} + +int ath9k_init_btcoex(struct ath_softc *sc) +{ + struct ath_txq *txq; + struct ath_hw *ah = sc->sc_ah; + int r; + + ath9k_hw_btcoex_init_scheme(ah); + + switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) { + case ATH_BTCOEX_CFG_NONE: + break; + case ATH_BTCOEX_CFG_2WIRE: + ath9k_hw_btcoex_init_2wire(sc->sc_ah); + break; + case ATH_BTCOEX_CFG_3WIRE: + ath9k_hw_btcoex_init_3wire(sc->sc_ah); + ath_init_btcoex_timer(sc); + txq = sc->tx.txq_map[IEEE80211_AC_BE]; + ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum); + break; + case ATH_BTCOEX_CFG_MCI: + ath_init_btcoex_timer(sc); + + sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE; + INIT_LIST_HEAD(&sc->btcoex.mci.info); + ath9k_hw_btcoex_init_mci(ah); + + r = ath_mci_setup(sc); + if (r) + return r; + + break; + default: + WARN_ON(1); + break; + } + + return 0; +} + +static int ath9k_dump_mci_btcoex(struct ath_softc *sc, u8 *buf, u32 size) +{ + struct ath_btcoex *btcoex = &sc->btcoex; + struct ath_mci_profile *mci = &btcoex->mci; + struct ath_hw *ah = sc->sc_ah; + struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw; + u32 len = 0; + int i; + + ATH_DUMP_BTCOEX("Total BT profiles", NUM_PROF(mci)); + ATH_DUMP_BTCOEX("MGMT", mci->num_mgmt); + ATH_DUMP_BTCOEX("SCO", mci->num_sco); + ATH_DUMP_BTCOEX("A2DP", mci->num_a2dp); + ATH_DUMP_BTCOEX("HID", mci->num_hid); + ATH_DUMP_BTCOEX("PAN", mci->num_pan); + ATH_DUMP_BTCOEX("ACL", mci->num_other_acl); + ATH_DUMP_BTCOEX("BDR", mci->num_bdr); + ATH_DUMP_BTCOEX("Aggr. Limit", mci->aggr_limit); + ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type); + ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period); + ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle); + ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time); + ATH_DUMP_BTCOEX("Concurrent Tx", btcoex_hw->mci.concur_tx); + ATH_DUMP_BTCOEX("Concurrent RSSI cnt", btcoex->rssi_count); + + len += scnprintf(buf + len, size - len, "BT Weights: "); + for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) + len += scnprintf(buf + len, size - len, "%08x ", + btcoex_hw->bt_weight[i]); + len += scnprintf(buf + len, size - len, "\n"); + len += scnprintf(buf + len, size - len, "WLAN Weights: "); + for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++) + len += scnprintf(buf + len, size - len, "%08x ", + btcoex_hw->wlan_weight[i]); + len += scnprintf(buf + len, size - len, "\n"); + len += scnprintf(buf + len, size - len, "Tx Priorities: "); + for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++) + len += scnprintf(buf + len, size - len, "%08x ", + btcoex_hw->tx_prio[i]); + + len += scnprintf(buf + len, size - len, "\n"); + + return len; +} + +static int ath9k_dump_legacy_btcoex(struct ath_softc *sc, u8 *buf, u32 size) +{ + + struct ath_btcoex *btcoex = &sc->btcoex; + u32 len = 0; + + ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type); + ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period); + ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle); + ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time); + + return len; +} + +int ath9k_dump_btcoex(struct ath_softc *sc, u8 *buf, u32 size) +{ + if (ath9k_hw_mci_is_enabled(sc->sc_ah)) + return ath9k_dump_mci_btcoex(sc, buf, size); + else + return ath9k_dump_legacy_btcoex(sc, buf, size); +} + +#endif /* CPTCFG_ATH9K_BTCOEX_SUPPORT */ |