2024年2月8日发(作者：)

* Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according* to @epd's transfer type.*/static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd){return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;}/*** usb_endpoint_dir_in - check if the endpoint has IN direction* @epd: endpoint to be checked** Returns true if the endpoint is of type IN, otherwise it returns false.*/static inline int usb_endpoint_dir_in(const struct usb_endpoint_descriptor *epd){return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN);}/*** usb_endpoint_dir_out - check if the endpoint has OUT direction* @epd: endpoint to be checked** Returns true if the endpoint is of type OUT, otherwise it returns false.*/static inline int usb_endpoint_dir_out(const struct usb_endpoint_descriptor *epd){return ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT);}/*** usb_endpoint_xfer_bulk - check if the endpoint has bulk transfer type* @epd: endpoint to be checked** Returns true if the endpoint is of type bulk, otherwise it returns false.*/

static inline int usb_endpoint_xfer_bulk(const struct usb_endpoint_descriptor *epd){return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==USB_ENDPOINT_XFER_BULK);}/*** usb_endpoint_xfer_control - check if the endpoint has control transfer type* @epd: endpoint to be checked** Returns true if the endpoint is of type control, otherwise it returns false.*/static inline int usb_endpoint_xfer_control(const struct usb_endpoint_descriptor *epd){return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==USB_ENDPOINT_XFER_CONTROL);}/*** usb_endpoint_xfer_int - check if the endpoint has interrupt transfer type* @epd: endpoint to be checked** Returns true if the endpoint is of type interrupt, otherwise it returns* false.*/static inline int usb_endpoint_xfer_int(const struct usb_endpoint_descriptor *epd){return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==USB_ENDPOINT_XFER_INT);}/*** usb_endpoint_xfer_isoc - check if the endpoint has isochronous transfer type* @epd: endpoint to be checked

** Returns true if the endpoint is of type isochronous, otherwise it returns* false.*/static inline int usb_endpoint_xfer_isoc(const struct usb_endpoint_descriptor *epd){return ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==USB_ENDPOINT_XFER_ISOC);}/*** usb_endpoint_is_bulk_in - check if the endpoint is bulk IN* @epd: endpoint to be checked** Returns true if the endpoint has bulk transfer type and IN direction,* otherwise it returns false.*/static inline int usb_endpoint_is_bulk_in(const struct usb_endpoint_descriptor *epd){return (usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_in(epd));}/*** usb_endpoint_is_bulk_out - check if the endpoint is bulk OUT* @epd: endpoint to be checked** Returns true if the endpoint has bulk transfer type and OUT direction,* otherwise it returns false.*/static inline int usb_endpoint_is_bulk_out(const struct usb_endpoint_descriptor *epd){return (usb_endpoint_xfer_bulk(epd) && usb_endpoint_dir_out(epd));}

/*** usb_endpoint_is_int_in - check if the endpoint is interrupt IN* @epd: endpoint to be checked** Returns true if the endpoint has interrupt transfer type and IN direction,* otherwise it returns false.*/static inline int usb_endpoint_is_int_in(const struct usb_endpoint_descriptor *epd){return (usb_endpoint_xfer_int(epd) && usb_endpoint_dir_in(epd));}/*** usb_endpoint_is_int_out - check if the endpoint is interrupt OUT* @epd: endpoint to be checked** Returns true if the endpoint has interrupt transfer type and OUT direction,* otherwise it returns false.*/static inline int usb_endpoint_is_int_out(const struct usb_endpoint_descriptor *epd){return (usb_endpoint_xfer_int(epd) && usb_endpoint_dir_out(epd));}/*** usb_endpoint_is_isoc_in - check if the endpoint is isochronous IN* @epd: endpoint to be checked** Returns true if the endpoint has isochronous transfer type and IN direction,* otherwise it returns false.*/static inline int usb_endpoint_is_isoc_in(const struct usb_endpoint_descriptor *epd){