static u32 ar9003_mci_wait_for_gpm(struct ath_hw *ah, u8 gpm_type,
u8 gpm_opcode, int time_out)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
u32 *p_gpm = NULL, mismatch = 0, more_data;
u32 offset;
u8 recv_type = 0, recv_opcode = 0;
bool b_is_bt_cal_done = (gpm_type == MCI_GPM_BT_CAL_DONE);
more_data = time_out ? MCI_GPM_NOMORE : MCI_GPM_MORE;
while (time_out > 0) {
if (p_gpm) {
MCI_GPM_RECYCLE(p_gpm);
p_gpm = NULL;
}
if (more_data != MCI_GPM_MORE)
time_out = ar9003_mci_wait_for_interrupt(ah,
AR_MCI_INTERRUPT_RX_MSG_RAW,
AR_MCI_INTERRUPT_RX_MSG_GPM,
time_out);
if (!time_out)
break;
offset = ar9003_mci_get_next_gpm_offset(ah, false, &more_data);
if (offset == MCI_GPM_INVALID)
continue;
p_gpm = (u32 *) (mci->gpm_buf + offset);
recv_type = MCI_GPM_TYPE(p_gpm);
recv_opcode = MCI_GPM_OPCODE(p_gpm);
if (MCI_GPM_IS_CAL_TYPE(recv_type)) {
if (recv_type == gpm_type) {
if ((gpm_type == MCI_GPM_BT_CAL_DONE) &&
!b_is_bt_cal_done) {
gpm_type = MCI_GPM_BT_CAL_GRANT;
continue;
}
break;
}
} else if ((recv_type == gpm_type) &&
(recv_opcode == gpm_opcode))
break;
/*
* check if it's cal_grant
*
* When we're waiting for cal_grant in reset routine,
* it's possible that BT sends out cal_request at the
* same time. Since BT's calibration doesn't happen
* that often, we'll let BT completes calibration then
* we continue to wait for cal_grant from BT.
* Orginal: Wait BT_CAL_GRANT.
* New: Receive BT_CAL_REQ -> send WLAN_CAL_GRANT->wait
* BT_CAL_DONE -> Wait BT_CAL_GRANT.
*/
if ((gpm_type == MCI_GPM_BT_CAL_GRANT) &&
(recv_type == MCI_GPM_BT_CAL_REQ)) {
u32 payload[4] = {0, 0, 0, 0};
gpm_type = MCI_GPM_BT_CAL_DONE;
MCI_GPM_SET_CAL_TYPE(payload,
MCI_GPM_WLAN_CAL_GRANT);
ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
false, false);
continue;
} else {
ath_dbg(common, MCI, "MCI GPM subtype not match 0x%x\n",
*(p_gpm + 1));
mismatch++;
ar9003_mci_process_gpm_extra(ah, recv_type,
recv_opcode, p_gpm);
}
}
if (p_gpm) {
MCI_GPM_RECYCLE(p_gpm);
p_gpm = NULL;
}
if (time_out <= 0)
time_out = 0;
while (more_data == MCI_GPM_MORE) {
offset = ar9003_mci_get_next_gpm_offset(ah, false, &more_data);
if (offset == MCI_GPM_INVALID)
break;
p_gpm = (u32 *) (mci->gpm_buf + offset);
recv_type = MCI_GPM_TYPE(p_gpm);
recv_opcode = MCI_GPM_OPCODE(p_gpm);
if (!MCI_GPM_IS_CAL_TYPE(recv_type))
ar9003_mci_process_gpm_extra(ah, recv_type,
recv_opcode, p_gpm);
MCI_GPM_RECYCLE(p_gpm);
}
return time_out;
}
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 u32 ar9003_mci_wait_for_gpm(struct ath_hw *ah, u8 gpm_type,
u8 gpm_opcode, int time_out)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
u32 *p_gpm = NULL, mismatch = 0, more_data;
u32 offset;
u8 recv_type = 0, recv_opcode = 0;
bool b_is_bt_cal_done = (gpm_type == MCI_GPM_BT_CAL_DONE);
more_data = time_out ? MCI_GPM_NOMORE : MCI_GPM_MORE;
while (time_out > 0) {
if (p_gpm) {
MCI_GPM_RECYCLE(p_gpm);
p_gpm = NULL;
}
if (more_data != MCI_GPM_MORE)
time_out = ar9003_mci_wait_for_interrupt(ah,
AR_MCI_INTERRUPT_RX_MSG_RAW,
AR_MCI_INTERRUPT_RX_MSG_GPM,
time_out);
if (!time_out)
break;
offset = ar9003_mci_state(ah, MCI_STATE_NEXT_GPM_OFFSET,
&more_data);
if (offset == MCI_GPM_INVALID)
continue;
p_gpm = (u32 *) (mci->gpm_buf + offset);
recv_type = MCI_GPM_TYPE(p_gpm);
recv_opcode = MCI_GPM_OPCODE(p_gpm);
if (MCI_GPM_IS_CAL_TYPE(recv_type)) {
if (recv_type == gpm_type) {
if ((gpm_type == MCI_GPM_BT_CAL_DONE) &&
!b_is_bt_cal_done) {
gpm_type = MCI_GPM_BT_CAL_GRANT;
continue;
}
break;
}
} else if ((recv_type == gpm_type) && (recv_opcode == gpm_opcode)) {
break;
}
if ((gpm_type == MCI_GPM_BT_CAL_GRANT) &&
(recv_type == MCI_GPM_BT_CAL_REQ)) {
u32 payload[4] = {0, 0, 0, 0};
gpm_type = MCI_GPM_BT_CAL_DONE;
MCI_GPM_SET_CAL_TYPE(payload,
MCI_GPM_WLAN_CAL_GRANT);
ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
false, false);
continue;
} else {
ath_dbg(common, MCI, "MCI GPM subtype not match 0x%x\n",
*(p_gpm + 1));
mismatch++;
ar9003_mci_process_gpm_extra(ah, recv_type,
recv_opcode, p_gpm);
}
}
if (p_gpm) {
MCI_GPM_RECYCLE(p_gpm);
p_gpm = NULL;
}
if (time_out <= 0)
time_out = 0;
while (more_data == MCI_GPM_MORE) {
offset = ar9003_mci_state(ah, MCI_STATE_NEXT_GPM_OFFSET,
&more_data);
if (offset == MCI_GPM_INVALID)
break;
p_gpm = (u32 *) (mci->gpm_buf + offset);
recv_type = MCI_GPM_TYPE(p_gpm);
recv_opcode = MCI_GPM_OPCODE(p_gpm);
if (!MCI_GPM_IS_CAL_TYPE(recv_type))
ar9003_mci_process_gpm_extra(ah, recv_type,
recv_opcode, p_gpm);
MCI_GPM_RECYCLE(p_gpm);
}
return time_out;
}
bool ar9003_mci_send_message(struct ath_hw *ah, u8 header, u32 flag,
u32 *payload, u8 len, bool wait_done,
bool check_bt)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
bool msg_sent = false;
u32 regval;
u32 saved_mci_int_en;
int i;
saved_mci_int_en = REG_READ(ah, AR_MCI_INTERRUPT_EN);
regval = REG_READ(ah, AR_BTCOEX_CTRL);
if ((regval == 0xdeadbeef) || !(regval & AR_BTCOEX_CTRL_MCI_MODE_EN)) {
ath_dbg(common, MCI,
"MCI Not sending 0x%x. MCI is not enabled. full_sleep = %d\n",
header, (ah->power_mode == ATH9K_PM_FULL_SLEEP) ? 1 : 0);
ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
return false;
} else if (check_bt && (mci->bt_state == MCI_BT_SLEEP)) {
ath_dbg(common, MCI,
"MCI Don't send message 0x%x. BT is in sleep state\n",
header);
ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
return false;
}
if (wait_done)
REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);
/* Need to clear SW_MSG_DONE raw bit before wait */
REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
(AR_MCI_INTERRUPT_SW_MSG_DONE |
AR_MCI_INTERRUPT_MSG_FAIL_MASK));
if (payload) {
for (i = 0; (i * 4) < len; i++)
REG_WRITE(ah, (AR_MCI_TX_PAYLOAD0 + i * 4),
*(payload + i));
}
REG_WRITE(ah, AR_MCI_COMMAND0,
(SM((flag & MCI_FLAG_DISABLE_TIMESTAMP),
AR_MCI_COMMAND0_DISABLE_TIMESTAMP) |
SM(len, AR_MCI_COMMAND0_LEN) |
SM(header, AR_MCI_COMMAND0_HEADER)));
if (wait_done &&
!(ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RAW,
AR_MCI_INTERRUPT_SW_MSG_DONE, 500)))
ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
else {
ar9003_mci_queue_unsent_gpm(ah, header, payload, false);
msg_sent = true;
}
if (wait_done)
REG_WRITE(ah, AR_MCI_INTERRUPT_EN, saved_mci_int_en);
return msg_sent;
}
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);
}
