/**
* dwc3_otg_set_peripheral - bind/unbind the peripheral controller driver.
*
* Returns 0 on success otherwise negative errno.
*/
static int dwc3_otg_set_peripheral(struct usb_otg *otg,
struct usb_gadget *gadget)
{
struct dwc3_otg *dotg = container_of(otg, struct dwc3_otg, otg);
struct otg_fsm *fsm = &dotg->fsm;
struct device *dev = dotg->dwc->dev;
if (gadget) {
dev_err(dev, "Binding gadget %s\n", gadget->name);
otg->gadget = gadget;
} else {
dev_err(dev, "Unbinding gadget\n");
mutex_lock(&fsm->lock);
if (otg->phy->state == OTG_STATE_B_PERIPHERAL) {
/* Reset OTG SM */
fsm->reset = 1;
dwc3_otg_statemachine(fsm);
fsm->reset = 0;
}
otg->gadget = NULL;
mutex_unlock(&fsm->lock);
dwc3_otg_run_sm(fsm);
}
return 0;
}
static irqreturn_t dwc3_otg_thread_interrupt(int irq, void *_dotg)
{
struct dwc3_otg *dotg = (struct dwc3_otg *)_dotg;
dwc3_otg_run_sm(&dotg->fsm);
return IRQ_HANDLED;
}
static ssize_t
dwc3_otg_store_id(struct device *dev,
struct device_attribute *attr, const char *buf, size_t n)
{
struct dwc3 *dwc = dev_get_drvdata(dev);
struct otg_fsm *fsm = &dwc->dotg->fsm;
int id;
if (sscanf(buf, "%d", &id) != 1)
return -EINVAL;
fsm->id = !!id;
dwc3_otg_run_sm(fsm);
return n;
}
/**
* 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;
}
