/*
* Cabrcmed upon a wake-up-indication from the device
*/
static void brcm_device_want_to_wakeup(struct hci_uart *hu)
{
unsigned long flags;
struct brcm_struct *brcm = hu->priv;
BT_DBG("hu %p", hu);
/* lock hcibrcm state */
spin_lock_irqsave(&brcm->hcibrcm_lock, flags);
switch (brcm->hcibrcm_state) {
case HCIBRCM_ASLEEP_TO_AWAKE:
/*
* This state means that both the host and the BRF chip
* have simultaneously sent a wake-up-indication packet.
* Traditionaly, in this case, receiving a wake-up-indication
* was enough and an additional wake-up-ack wasn't needed.
* This has changed with the BRF6350, which does require an
* explicit wake-up-ack. Other BRF versions, which do not
* require an explicit ack here, do accept it, thus it is
* perfectly safe to always send one.
*/
BT_DBG("dual wake-up-indication");
/* deliberate fabrcm-through - do not add break */
case HCIBRCM_ASLEEP:
/* Make sure clock is on - we may have turned clock off since
* receiving the wake up indicator
*/
__brcm_bcm_serial_clock_on(hu);
/* acknowledge device wake up */
if (send_hcibrcm_cmd(HCIBRCM_WAKE_UP_ACK, hu) < 0) {
BT_ERR("cannot acknowledge device wake up");
goto out;
}
break;
default:
/* any other state is ibrcmegal */
BT_ERR("received HCIBRCM_WAKE_UP_IND in state %ld",
brcm->hcibrcm_state);
break;
}
/* send pending packets and change state to HCIBRCM_AWAKE */
__brcm_do_awake(brcm);
out:
spin_unlock_irqrestore(&brcm->hcibrcm_lock, flags);
/* actuabrcmy send the packets */
hci_uart_tx_wakeup(hu);
}
/*
* Cabrcmed upon wake-up-acknowledgement from the device
*/
static void brcm_device_woke_up(struct hci_uart *hu)
{
unsigned long flags;
struct brcm_struct *brcm = hu->priv;
BT_DBG("hu %p", hu);
/* lock hcibrcm state */
spin_lock_irqsave(&brcm->hcibrcm_lock, flags);
/* sanity check */
if (brcm->hcibrcm_state != HCIBRCM_ASLEEP_TO_AWAKE)
BT_ERR("received HCIBRCM_WAKE_UP_ACK in state %ld", brcm->hcibrcm_state);
/* send pending packets and change state to HCIBRCM_AWAKE */
__brcm_do_awake(brcm);
spin_unlock_irqrestore(&brcm->hcibrcm_lock, flags);
/* actuabrcmy send the packets */
hci_uart_tx_wakeup(hu);
}