/*
* For the NC type headset, a single interrupt is triggered
* for all the events (insert, remove, press, release).
* A external GPIO is used to distinguish between diff. states.
* The GPIO is pulled low when the headset is inserted. Using
* the current state of the switch, headset and the gpio value we
* determine which event has occured.
*/
static void othc_process_nc(struct pm8058_othc *dd)
{
if (!gpio_get_value(dd->othc_nc_gpio)) {
/* headset plugged in and/or button press/release */
if (dd->othc_ir_state == false) {
/* disable irq, this gets enabled in the workqueue */
disable_irq_nosync(dd->othc_irq_ir);
/* headset plugged in */
dd->othc_ir_state = true;
pm8058_headset_switch(dd->othc_ipd,
SW_HEADPHONE_INSERT, 1);
} else if (dd->othc_sw_state == false) {
/* Switch has been pressed */
dd->othc_sw_state = true;
input_report_key(dd->othc_ipd, KEY_MEDIA, 1);
} else {
/* Switch has been released */
dd->othc_sw_state = false;
input_report_key(dd->othc_ipd, KEY_MEDIA, 0);
}
} else {
/* disable irq, this gets enabled in the workqueue */
disable_irq_nosync(dd->othc_irq_ir);
/* headset has been plugged out */
dd->othc_ir_state = false;
pm8058_headset_switch(dd->othc_ipd,
SW_HEADPHONE_INSERT, 0);
}
}
/*
* The pm8058_nc_ir detects insert / remove of the headset (for NO and NC),
* as well as button press / release (for NC type).
* The current state of the headset is maintained in othc_ir_state variable.
*/
static irqreturn_t pm8058_nc_ir(int irq, void *dev_id)
{
struct pm8058_othc *dd = dev_id;
struct othc_hsed_config *hsed_config = dd->othc_pdata->hsed_config;
if (hsed_config->othc_headset == OTHC_HEADSET_NC)
othc_process_nc(dd);
else {
/* disable irq, this gets enabled in the workqueue */
disable_irq_nosync(dd->othc_irq_ir);
/* Processing for NO type headset */
if (dd->othc_ir_state == false) {
/* headset jack inserted */
dd->othc_ir_state = true;
pm8058_headset_switch(dd->othc_ipd,
SW_HEADPHONE_INSERT, 1);
} else {
/* headset jack removed */
dd->othc_ir_state = false;
pm8058_headset_switch(dd->othc_ipd,
SW_HEADPHONE_INSERT, 0);
}
}
input_sync(dd->othc_ipd);
return IRQ_HANDLED;
}
/*
* The pm8058_nc_ir detects insert / remove of the headset (for NO and NC),
* as well as button press / release (for NC type).
* The current state of the headset is maintained in othc_ir_state variable.
* Due to a hardware bug, false switch interrupts are seen during headset
* insert. This is handled in the software by rejecting the switch interrupts
* for a small period of time after the headset has been inserted.
*/
static irqreturn_t pm8058_nc_ir(int irq, void *dev_id)
{
unsigned long flags;
struct pm8058_othc *dd = dev_id;
struct othc_hsed_config *hsed_config = dd->othc_pdata->hsed_config;
spin_lock_irqsave(&dd->lock, flags);
/* Enable the switch reject flag */
dd->switch_reject = true;
spin_unlock_irqrestore(&dd->lock, flags);
/* Start the HR timer if one is not active */
if (hrtimer_active(&dd->timer))
hrtimer_cancel(&dd->timer);
hrtimer_start(&dd->timer,
ktime_set((dd->switch_debounce_ms / 1000),
(dd->switch_debounce_ms % 1000) * 1000000), HRTIMER_MODE_REL);
if (hsed_config->othc_headset == OTHC_HEADSET_NC)
othc_process_nc(dd);
else {
/* disable irq, this gets enabled in the workqueue */
disable_irq_nosync(dd->othc_irq_ir);
/* Processing for NO type headset */
if (dd->othc_ir_state == false) {
/* headset jack inserted */
dd->othc_ir_state = true;
pm8058_headset_switch(dd->othc_ipd,
SW_HEADPHONE_INSERT, 1);
} else {
/* headset jack removed */
dd->othc_ir_state = false;
pm8058_headset_switch(dd->othc_ipd,
SW_HEADPHONE_INSERT, 0);
}
}
input_sync(dd->othc_ipd);
return IRQ_HANDLED;
}
