/**
* dwc3_otg_interrupt - interrupt handler for dwc3 otg events.
*
* @irq: irq number.
* @_dotg: Pointer to dwc3 otg context structure.
*/
static irqreturn_t dwc3_otg_interrupt(int irq, void *_dotg)
{
struct dwc3_otg *dotg = (struct dwc3_otg *)_dotg;
struct otg_fsm *fsm = &dotg->fsm;
u32 oevt, handled_events = 0;
irqreturn_t ret = IRQ_NONE;
oevt = dwc3_readl(dotg->regs, DWC3_OEVT);
/* ID */
if (oevt & DWC3_OEVTEN_OTGCONIDSTSCHNGEVNT) {
fsm->id = dwc3_otg_get_id_state(dotg);
handled_events |= DWC3_OEVTEN_OTGCONIDSTSCHNGEVNT;
}
/* VBus */
if (oevt & DWC3_OEVTEN_OTGBDEVVBUSCHNGEVNT) {
fsm->b_sess_vld = dwc3_otg_get_b_sess_state(dotg);
handled_events |= DWC3_OEVTEN_OTGBDEVVBUSCHNGEVNT;
}
if (handled_events) {
dwc3_writel(dotg->regs, DWC3_OEVT, handled_events);
ret = IRQ_WAKE_THREAD;
}
return ret;
}
/**
* dwc3_otg_start
* @dwc: pointer to our controller context structure
*/
int dwc3_otg_start(struct dwc3 *dwc)
{
struct dwc3_otg *dotg = dwc->dotg;
struct otg_fsm *fsm = &dotg->fsm;
int ret;
if (dotg->ext_otg_ops) {
ret = dwc3_ext_otg_start(dotg);
if (ret) {
dev_err(dwc->dev, "failed to start external OTG\n");
return ret;
}
} else {
dotg->regs = dwc->regs;
dwc3_otg_reset(dotg);
dotg->fsm.id = dwc3_otg_get_id_state(dotg);
dotg->fsm.b_sess_vld = dwc3_otg_get_b_sess_state(dotg);
dotg->irq = platform_get_irq(to_platform_device(dwc->dev), 0);
ret = devm_request_threaded_irq(dwc->dev, dotg->irq,
dwc3_otg_interrupt,
dwc3_otg_thread_interrupt,
IRQF_SHARED, "dwc3-otg", dotg);
if (ret) {
dev_err(dwc->dev, "failed to request irq #%d --> %d\n",
dotg->irq, ret);
return ret;
}
dwc3_otg_enable_irq(dotg);
}
dotg->ready = 1;
dwc3_otg_run_sm(fsm);
return 0;
}