int ar9003_mci_end_reset(struct ath_hw *ah, struct ath9k_channel *chan, struct ath9k_hw_cal_data *caldata) { 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)) goto exit; /* * 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. */ REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, (AR_MCI_INTERRUPT_RX_MSG_REMOTE_RESET | AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE)); 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; REG_CLR_BIT(ah, AR_PHY_TIMING4, 1 << AR_PHY_TIMING_CONTROL4_DO_GAIN_DC_IQ_CAL_SHIFT); if (caldata) { caldata->done_txiqcal_once = false; caldata->done_txclcal_once = false; caldata->rtt_done = false; } if (!ath9k_hw_init_cal(ah, chan)) return -EIO; REG_SET_BIT(ah, AR_PHY_TIMING4, 1 << AR_PHY_TIMING_CONTROL4_DO_GAIN_DC_IQ_CAL_SHIFT); exit: ar9003_mci_enable_interrupt(ah); return 0; }
int ar9003_mci_end_reset(struct ath_hw *ah, struct ath9k_channel *chan, struct ath9k_hw_cal_data *caldata) { 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)) { REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_REMOTE_RESET | AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE); 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; 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; }
static void ar9003_mci_prep_interface(struct ath_hw *ah) { struct ath_common *common = ath9k_hw_common(ah); struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci; u32 saved_mci_int_en; u32 mci_timeout = 150; mci->bt_state = MCI_BT_SLEEP; saved_mci_int_en = REG_READ(ah, AR_MCI_INTERRUPT_EN); REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0); REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW)); REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, REG_READ(ah, AR_MCI_INTERRUPT_RAW)); ar9003_mci_remote_reset(ah, true); ar9003_mci_send_req_wake(ah, true); if (!ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING, 500)) goto clear_redunt; mci->bt_state = MCI_BT_AWAKE; /* * we don't need to send more remote_reset at this moment. * If BT receive first remote_reset, then BT HW will * be cleaned up and will be able to receive req_wake * and BT HW will respond sys_waking. * In this case, WLAN will receive BT's HW sys_waking. * Otherwise, if BT SW missed initial remote_reset, * that remote_reset will still clean up BT MCI RX, * and the req_wake will wake BT up, * and BT SW will respond this req_wake with a remote_reset and * sys_waking. In this case, WLAN will receive BT's SW * sys_waking. In either case, BT's RX is cleaned up. So we * don't need to reply BT's remote_reset now, if any. * Similarly, if in any case, WLAN can receive BT's sys_waking, * that means WLAN's RX is also fine. */ ar9003_mci_send_sys_waking(ah, true); udelay(10); /* * Set BT priority interrupt value to be 0xff to * avoid having too many BT PRIORITY interrupts. */ REG_WRITE(ah, AR_MCI_BT_PRI0, 0xFFFFFFFF); REG_WRITE(ah, AR_MCI_BT_PRI1, 0xFFFFFFFF); REG_WRITE(ah, AR_MCI_BT_PRI2, 0xFFFFFFFF); REG_WRITE(ah, AR_MCI_BT_PRI3, 0xFFFFFFFF); REG_WRITE(ah, AR_MCI_BT_PRI, 0X000000FF); /* * A contention reset will be received after send out * sys_waking. Also BT priority interrupt bits will be set. * Clear those bits before the next step. */ REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_CONT_RST); REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, AR_MCI_INTERRUPT_BT_PRI); if (mci->is_2g) { ar9003_mci_send_lna_transfer(ah, true); udelay(5); } if ((mci->is_2g && !mci->update_2g5g)) { if (ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_LNA_INFO, mci_timeout)) ath_dbg(common, MCI, "MCI WLAN has control over the LNA & BT obeys it\n"); else ath_dbg(common, MCI, "MCI BT didn't respond to LNA_TRANS\n"); } clear_redunt: /* Clear the extra redundant SYS_WAKING from BT */ if ((mci->bt_state == MCI_BT_AWAKE) && (REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING)) && (REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) == 0)) { REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING); REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, AR_MCI_INTERRUPT_REMOTE_SLEEP_UPDATE); } REG_WRITE(ah, AR_MCI_INTERRUPT_EN, saved_mci_int_en); }
static void ar9003_mci_prep_interface(struct ath_hw *ah) { struct ath_common *common = ath9k_hw_common(ah); struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci; u32 saved_mci_int_en; u32 mci_timeout = 150; mci->bt_state = MCI_BT_SLEEP; saved_mci_int_en = REG_READ(ah, AR_MCI_INTERRUPT_EN); REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0); REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW)); REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, REG_READ(ah, AR_MCI_INTERRUPT_RAW)); ar9003_mci_remote_reset(ah, true); ar9003_mci_send_req_wake(ah, true); if (ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING, 500)) { mci->bt_state = MCI_BT_AWAKE; ar9003_mci_send_sys_waking(ah, true); udelay(10); REG_WRITE(ah, AR_MCI_BT_PRI0, 0xFFFFFFFF); REG_WRITE(ah, AR_MCI_BT_PRI1, 0xFFFFFFFF); REG_WRITE(ah, AR_MCI_BT_PRI2, 0xFFFFFFFF); REG_WRITE(ah, AR_MCI_BT_PRI3, 0xFFFFFFFF); REG_WRITE(ah, AR_MCI_BT_PRI, 0X000000FF); REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_CONT_RST); REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, AR_MCI_INTERRUPT_BT_PRI); if (mci->is_2g) { ar9003_mci_send_lna_transfer(ah, true); udelay(5); } if ((mci->is_2g && !mci->update_2g5g)) { if (ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_LNA_INFO, mci_timeout)) ath_dbg(common, MCI, "MCI WLAN has control over the LNA & BT obeys it\n"); else ath_dbg(common, MCI, "MCI BT didn't respond to LNA_TRANS\n"); } } if ((mci->bt_state == MCI_BT_AWAKE) && (REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING)) && (REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) == 0)) { REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING); REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, AR_MCI_INTERRUPT_REMOTE_SLEEP_UPDATE); } REG_WRITE(ah, AR_MCI_INTERRUPT_EN, saved_mci_int_en); }