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/* Handle general USB interrupts and dispatch according to type.
 * This function implements TRM Figure 14-13.
 */
void s3c2410_udc_irq(void)
{
	struct usb_endpoint_instance *ep0 = udc_device->bus->endpoint_array;
	u_int32_t save_idx = inl(S3C2410_UDC_INDEX_REG);

	/* read interrupt sources */
	u_int32_t usb_status = inl(S3C2410_UDC_USB_INT_REG);
	u_int32_t usbd_status = inl(S3C2410_UDC_EP_INT_REG);

	//debug("< IRQ usbs=0x%02x, usbds=0x%02x start >", usb_status, usbd_status);

	/* clear interrupts */
	outl(usb_status, S3C2410_UDC_USB_INT_REG);

	if (usb_status & S3C2410_UDC_USBINT_RESET) {
		//serial_putc('R');
		debug("RESET pwr=0x%x\n", inl(S3C2410_UDC_PWR_REG));
		udc_setup_ep(udc_device, 0, ep0);
		outl(S3C2410_UDC_EP0_CSR_SSE|S3C2410_UDC_EP0_CSR_SOPKTRDY, S3C2410_UDC_EP0_CSR_REG);
		ep0->state = EP0_IDLE;
		usbd_device_event_irq (udc_device, DEVICE_RESET, 0);
	}