EP0_STALL
ast_udc_write(udc, ast_udc_read(udc, AST_UDC_EP0_CTRL) | EP0_STALL,
ast_udc_write(udc, ast_udc_read(udc, AST_UDC_EP0_CTRL) | EP0_STALL,
ctrl |= EP0_STALL;
ctrl &= ~EP0_STALL;
case EP0_STALL:
dev->ep0state = EP0_STALL;
ep->dev->ep0state = EP0_STALL;
ep->dev->ep0state = EP0_STALL;
if (dev->ep0state == EP0_STALL
dev->ep0state = EP0_STALL;
case EP0_STALL: