From 528e5d3605a589632bb6660aa1ea90729f8ca776 Mon Sep 17 00:00:00 2001 From: Sujith Manoharan Date: Wed, 22 Feb 2012 12:41:12 +0530 Subject: [PATCH] ath9k_hw: Cleanup MCI bits from ath9k_hw_reset() This patch moves all the MCI-specific code in the main reset function to helper functions. Signed-off-by: Sujith Manoharan Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/ar9003_mci.c | 142 ++++++++++++++++++++++++++++ drivers/net/wireless/ath/ath9k/hw.c | 129 +++---------------------- drivers/net/wireless/ath/ath9k/hw.h | 10 ++ 3 files changed, 163 insertions(+), 118 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mci.c b/drivers/net/wireless/ath/ath9k/ar9003_mci.c index 65db2cd..597e707 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_mci.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_mci.c @@ -16,6 +16,7 @@ #include #include "hw.h" +#include "hw-ops.h" #include "ar9003_phy.h" #include "ar9003_mci.h" @@ -567,6 +568,131 @@ static bool ar9003_mci_send_coex_bt_flags(struct ath_hw *ah, bool wait_done, wait_done, true); } +void ar9003_mci_check_bt(struct ath_hw *ah) +{ + struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci; + + if (!mci_hw->ready) + return; + + /* + * check BT state again to make + * sure it's not changed. + */ + ar9003_mci_sync_bt_state(ah); + ar9003_mci_2g5g_switch(ah, true); + + if ((mci_hw->bt_state == MCI_BT_AWAKE) && + (mci_hw->query_bt == true)) { + mci_hw->need_flush_btinfo = true; + } +} + +bool ar9003_mci_start_reset(struct ath_hw *ah, struct ath9k_channel *chan) +{ + struct ath_common *common = ath9k_hw_common(ah); + struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci; + u32 payload[4] = {0, 0, 0, 0}; + + ar9003_mci_2g5g_changed(ah, IS_CHAN_2GHZ(chan)); + + if (mci_hw->bt_state != MCI_BT_CAL_START) + return false; + + ath_dbg(common, MCI, "MCI stop rx for BT CAL\n"); + + mci_hw->bt_state = MCI_BT_CAL; + + /* + * MCI FIX: disable mci interrupt here. This is to avoid + * SW_MSG_DONE or RX_MSG bits to trigger MCI_INT and + * lead to mci_intr reentry. + */ + + ar9003_mci_disable_interrupt(ah); + + ath_dbg(common, MCI, "send WLAN_CAL_GRANT\n"); + + MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_GRANT); + ar9003_mci_send_message(ah, MCI_GPM, 0, payload, + 16, true, false); + + ath_dbg(common, MCI, "\nMCI BT is calibrating\n"); + + /* Wait BT calibration to be completed for 25ms */ + + if (ar9003_mci_wait_for_gpm(ah, MCI_GPM_BT_CAL_DONE, + 0, 25000)) + ath_dbg(common, MCI, + "MCI got BT_CAL_DONE\n"); + else + ath_dbg(common, MCI, + "MCI ### BT cal takes to long, force bt_state to be bt_awake\n"); + + mci_hw->bt_state = MCI_BT_AWAKE; + /* MCI FIX: enable mci interrupt here */ + ar9003_mci_enable_interrupt(ah); + + return true; +} + +int ar9003_mci_end_reset(struct ath_hw *ah, struct ath9k_channel *chan, + struct ath9k_hw_cal_data *caldata) +{ + struct ath_common *common = ath9k_hw_common(ah); + struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci; + + if (!mci_hw->ready) + return 0; + + if (!IS_CHAN_2GHZ(chan) || (mci_hw->bt_state != MCI_BT_SLEEP)) + goto exit; + + if (ar9003_mci_check_int(ah, AR_MCI_INTERRUPT_RX_MSG_REMOTE_RESET) || + ar9003_mci_check_int(ah, AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE)) { + + /* + * BT is sleeping. Check if BT wakes up during + * WLAN calibration. If BT wakes up during + * WLAN calibration, need to go through all + * message exchanges again and recal. + */ + + ath_dbg(common, MCI, + "MCI BT wakes up during WLAN calibration\n"); + + REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, + AR_MCI_INTERRUPT_RX_MSG_REMOTE_RESET | + AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE); + + ath_dbg(common, MCI, "MCI send REMOTE_RESET\n"); + + ar9003_mci_remote_reset(ah, true); + ar9003_mci_send_sys_waking(ah, true); + udelay(1); + + if (IS_CHAN_2GHZ(chan)) + ar9003_mci_send_lna_transfer(ah, true); + + mci_hw->bt_state = MCI_BT_AWAKE; + + ath_dbg(common, MCI, "MCI re-cal\n"); + + if (caldata) { + caldata->done_txiqcal_once = false; + caldata->done_txclcal_once = false; + caldata->rtt_hist.num_readings = 0; + } + + if (!ath9k_hw_init_cal(ah, chan)) + return -EIO; + + } +exit: + ar9003_mci_enable_interrupt(ah); + return 0; +} + void ar9003_mci_reset(struct ath_hw *ah, bool en_int, bool is_2g, bool is_full_sleep) { @@ -696,6 +822,22 @@ void ar9003_mci_reset(struct ath_hw *ah, bool en_int, bool is_2g, ar9003_mci_enable_interrupt(ah); } +void ar9003_mci_stop_bt(struct ath_hw *ah, bool save_fullsleep) +{ + struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci; + + ar9003_mci_disable_interrupt(ah); + + if (mci_hw->ready && !save_fullsleep) { + ar9003_mci_mute_bt(ah); + udelay(20); + REG_WRITE(ah, AR_BTCOEX_CTRL, 0); + } + + mci_hw->bt_state = MCI_BT_SLEEP; + mci_hw->ready = false; +} + void ar9003_mci_mute_bt(struct ath_hw *ah) { struct ath_common *common = ath9k_hw_common(ah); diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 406ffd0..475e4ca 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -1518,61 +1518,22 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, struct ath9k_hw_cal_data *caldata, bool bChannelChange) { struct ath_common *common = ath9k_hw_common(ah); - struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci; u32 saveLedState; struct ath9k_channel *curchan = ah->curchan; u32 saveDefAntenna; u32 macStaId1; u64 tsf = 0; int i, r; - bool allow_fbs = false; + bool allow_fbs = false, start_mci_reset = false; bool mci = !!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI); bool save_fullsleep = ah->chip_fullsleep; if (mci) { - - ar9003_mci_2g5g_changed(ah, IS_CHAN_2GHZ(chan)); - - if (mci_hw->bt_state == MCI_BT_CAL_START) { - u32 payload[4] = {0, 0, 0, 0}; - - ath_dbg(common, MCI, "MCI stop rx for BT CAL\n"); - - mci_hw->bt_state = MCI_BT_CAL; - - /* - * MCI FIX: disable mci interrupt here. This is to avoid - * SW_MSG_DONE or RX_MSG bits to trigger MCI_INT and - * lead to mci_intr reentry. - */ - - ar9003_mci_disable_interrupt(ah); - - ath_dbg(common, MCI, "send WLAN_CAL_GRANT\n"); - MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_GRANT); - ar9003_mci_send_message(ah, MCI_GPM, 0, payload, - 16, true, false); - - ath_dbg(common, MCI, "\nMCI BT is calibrating\n"); - - /* Wait BT calibration to be completed for 25ms */ - - if (ar9003_mci_wait_for_gpm(ah, MCI_GPM_BT_CAL_DONE, - 0, 25000)) - ath_dbg(common, MCI, - "MCI got BT_CAL_DONE\n"); - else - ath_dbg(common, MCI, - "MCI ### BT cal takes to long, force bt_state to be bt_awake\n"); - mci_hw->bt_state = MCI_BT_AWAKE; - /* MCI FIX: enable mci interrupt here */ - ar9003_mci_enable_interrupt(ah); - - return true; - } + start_mci_reset = ar9003_mci_start_reset(ah, chan); + if (start_mci_reset) + return 0; } - if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE)) return -EIO; @@ -1609,7 +1570,7 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, if (ath9k_hw_channel_change(ah, chan)) { ath9k_hw_loadnf(ah, ah->curchan); ath9k_hw_start_nfcal(ah, true); - if (mci && mci_hw->ready) + if (mci && ar9003_mci_is_ready(ah)) ar9003_mci_2g5g_switch(ah, true); if (AR_SREV_9271(ah)) @@ -1618,19 +1579,8 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, } } - if (mci) { - ar9003_mci_disable_interrupt(ah); - - if (mci_hw->ready && !save_fullsleep) { - ar9003_mci_mute_bt(ah); - udelay(20); - REG_WRITE(ah, AR_BTCOEX_CTRL, 0); - } - - mci_hw->bt_state = MCI_BT_SLEEP; - mci_hw->ready = false; - } - + if (mci) + ar9003_mci_stop_bt(ah, save_fullsleep); saveDefAntenna = REG_READ(ah, AR_DEF_ANTENNA); if (saveDefAntenna == 0) @@ -1807,53 +1757,8 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, ath9k_hw_loadnf(ah, chan); ath9k_hw_start_nfcal(ah, true); - if (mci && mci_hw->ready) { - - if (IS_CHAN_2GHZ(chan) && - (mci_hw->bt_state == MCI_BT_SLEEP)) { - - if (ar9003_mci_check_int(ah, - AR_MCI_INTERRUPT_RX_MSG_REMOTE_RESET) || - ar9003_mci_check_int(ah, - AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE)) { - - /* - * BT is sleeping. Check if BT wakes up during - * WLAN calibration. If BT wakes up during - * WLAN calibration, need to go through all - * message exchanges again and recal. - */ - - ath_dbg(common, MCI, - "MCI BT wakes up during WLAN calibration\n"); - - REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, - AR_MCI_INTERRUPT_RX_MSG_REMOTE_RESET | - AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE); - ath_dbg(common, MCI, "MCI send REMOTE_RESET\n"); - ar9003_mci_remote_reset(ah, true); - ar9003_mci_send_sys_waking(ah, true); - udelay(1); - if (IS_CHAN_2GHZ(chan)) - ar9003_mci_send_lna_transfer(ah, true); - - mci_hw->bt_state = MCI_BT_AWAKE; - - ath_dbg(common, MCI, "MCI re-cal\n"); - - if (caldata) { - caldata->done_txiqcal_once = false; - caldata->done_txclcal_once = false; - caldata->rtt_hist.num_readings = 0; - } - - if (!ath9k_hw_init_cal(ah, chan)) - return -EIO; - - } - } - ar9003_mci_enable_interrupt(ah); - } + if (mci && ar9003_mci_end_reset(ah, chan, caldata)) + return -EIO; ENABLE_REGWRITE_BUFFER(ah); @@ -1898,20 +1803,8 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) ath9k_hw_btcoex_enable(ah); - if (mci && mci_hw->ready) { - /* - * check BT state again to make - * sure it's not changed. - */ - - ar9003_mci_sync_bt_state(ah); - ar9003_mci_2g5g_switch(ah, true); - - if ((mci_hw->bt_state == MCI_BT_AWAKE) && - (mci_hw->query_bt == true)) { - mci_hw->need_flush_btinfo = true; - } - } + if (mci) + ar9003_mci_check_bt(ah); if (AR_SREV_9300_20_OR_LATER(ah)) { ar9003_hw_bb_watchdog_config(ah); diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h index ff75254..0d108dc 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -1209,6 +1209,7 @@ void ath9k_hw_ani_monitor(struct ath_hw *ah, struct ath9k_channel *chan); bool ar9003_mci_send_message(struct ath_hw *ah, u8 header, u32 flag, u32 *payload, u8 len, bool wait_done, bool check_bt); +void ar9003_mci_stop_bt(struct ath_hw *ah, bool sava_fullsleep); void ar9003_mci_mute_bt(struct ath_hw *ah); u32 ar9003_mci_state(struct ath_hw *ah, u32 state_type, u32 *p_data); void ar9003_mci_init_cal_req(struct ath_hw *ah, bool *is_reusable); @@ -1225,6 +1226,10 @@ void ar9003_mci_set_full_sleep(struct ath_hw *ah); void ar9003_mci_disable_interrupt(struct ath_hw *ah); void ar9003_mci_enable_interrupt(struct ath_hw *ah); void ar9003_mci_2g5g_switch(struct ath_hw *ah, bool wait_done); +void ar9003_mci_check_bt(struct ath_hw *ah); +bool ar9003_mci_start_reset(struct ath_hw *ah, struct ath9k_channel *chan); +int ar9003_mci_end_reset(struct ath_hw *ah, struct ath9k_channel *chan, + struct ath9k_hw_cal_data *caldata); void ar9003_mci_reset(struct ath_hw *ah, bool en_int, bool is_2g, bool is_full_sleep); bool ar9003_mci_check_int(struct ath_hw *ah, u32 ints); @@ -1236,6 +1241,11 @@ void ar9003_mci_get_interrupt(struct ath_hw *ah, u32 *raw_intr, u32 *rx_msg_intr); void ar9003_mci_get_isr(struct ath_hw *ah, enum ath9k_int *masked); +static inline bool ar9003_mci_is_ready(struct ath_hw *ah) +{ + return ah->btcoex_hw.mci.ready; +} + #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT static inline enum ath_btcoex_scheme ath9k_hw_get_btcoex_scheme(struct ath_hw *ah) -- 2.7.4