static void start_link_pm(struct modem_link_pm *pm, enum pm_event event)
{
int cp2ap_wakeup;
int cp2ap_status;
enum pm_state state;
unsigned long flags;
spin_lock_irqsave(&pm->lock, flags);
if (pm->active) {
mif_err("%s: PM is already ACTIVE\n", pm->link_name);
goto exit;
}
lock_pm_wake(pm);
if (event == PM_EVENT_LOCK_ON) {
state = PM_STATE_LOCKED_ON;
assert_ap2cp_wakeup(pm);
assert_ap2cp_status(pm);
} else if (event == PM_EVENT_CP_BOOTING) {
state = PM_STATE_CP_BOOTING;
assert_ap2cp_wakeup(pm);
assert_ap2cp_status(pm);
} else {
state = PM_STATE_UNMOUNTED;
release_ap2cp_wakeup(pm);
release_ap2cp_status(pm);
}
/*
Enable every CP-to-AP IRQ and set it as a wake-up source
*/
cp2ap_wakeup = gpio_get_value(pm->gpio_cp2ap_wakeup);
change_irq_level(pm->cp2ap_wakeup_irq.num, cp2ap_wakeup);
mif_enable_irq(&pm->cp2ap_wakeup_irq);
cp2ap_status = gpio_get_value(pm->gpio_cp2ap_status);
change_irq_level(pm->cp2ap_status_irq.num, cp2ap_status);
mif_enable_irq(&pm->cp2ap_status_irq);
set_pm_fsm(pm, PM_STATE_UNMOUNTED, state, event);
pm->hold_requested = false;
pm->active = true;
#ifdef DEBUG_MODEM_IF
print_pm_fsm(pm);
#endif
exit:
spin_unlock_irqrestore(&pm->lock, flags);
}
static inline void decide_pm_wake(struct modem_link_pm *pm,
enum pm_state c_state,
enum pm_state n_state)
{
if (n_state == c_state)
return;
switch (n_state) {
case PM_STATE_UNMOUNTED:
unlock_pm_wake(pm);
break;
case PM_STATE_ACTIVE:
lock_pm_wake(pm);
break;
default:
break;
}
}
static inline void prepare_mount(struct modem_link_pm *pm)
{
lock_pm_wake(pm);
forbid_link_suspend(pm);
}