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);
}
