| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* |
| * USB Raw Gadget driver. |
| * |
| * See Documentation/usb/raw-gadget.rst for more details. |
| */ |
| |
| #ifndef _UAPI__LINUX_USB_RAW_GADGET_H |
| #define _UAPI__LINUX_USB_RAW_GADGET_H |
| |
| #include <asm/ioctl.h> |
| #include <linux/types.h> |
| #include <linux/usb/ch9.h> |
| |
| /* Maximum length of driver_name/device_name in the usb_raw_init struct. */ |
| #define UDC_NAME_LENGTH_MAX 128 |
| |
| /* |
| * struct usb_raw_init - argument for USB_RAW_IOCTL_INIT ioctl. |
| * @speed: The speed of the emulated USB device, takes the same values as |
| * the usb_device_speed enum: USB_SPEED_FULL, USB_SPEED_HIGH, etc. |
| * @driver_name: The name of the UDC driver. |
| * @device_name: The name of a UDC instance. |
| * |
| * The last two fields identify a UDC the gadget driver should bind to. |
| * For example, Dummy UDC has "dummy_udc" as its driver_name and "dummy_udc.N" |
| * as its device_name, where N in the index of the Dummy UDC instance. |
| * At the same time the dwc2 driver that is used on Raspberry Pi Zero, has |
| * "20980000.usb" as both driver_name and device_name. |
| */ |
| struct usb_raw_init { |
| __u8 driver_name[UDC_NAME_LENGTH_MAX]; |
| __u8 device_name[UDC_NAME_LENGTH_MAX]; |
| __u8 speed; |
| }; |
| |
| /* The type of event fetched with the USB_RAW_IOCTL_EVENT_FETCH ioctl. */ |
| enum usb_raw_event_type { |
| USB_RAW_EVENT_INVALID = 0, |
| |
| /* This event is queued when the driver has bound to a UDC. */ |
| USB_RAW_EVENT_CONNECT = 1, |
| |
| /* This event is queued when a new control request arrived to ep0. */ |
| USB_RAW_EVENT_CONTROL = 2, |
| |
| /* The list might grow in the future. */ |
| }; |
| |
| /* |
| * struct usb_raw_event - argument for USB_RAW_IOCTL_EVENT_FETCH ioctl. |
| * @type: The type of the fetched event. |
| * @length: Length of the data buffer. Updated by the driver and set to the |
| * actual length of the fetched event data. |
| * @data: A buffer to store the fetched event data. |
| * |
| * Currently the fetched data buffer is empty for USB_RAW_EVENT_CONNECT, |
| * and contains struct usb_ctrlrequest for USB_RAW_EVENT_CONTROL. |
| */ |
| struct usb_raw_event { |
| __u32 type; |
| __u32 length; |
| __u8 data[0]; |
| }; |
| |
| #define USB_RAW_IO_FLAGS_ZERO 0x0001 |
| #define USB_RAW_IO_FLAGS_MASK 0x0001 |
| |
| static inline int usb_raw_io_flags_valid(__u16 flags) |
| { |
| return (flags & ~USB_RAW_IO_FLAGS_MASK) == 0; |
| } |
| |
| static inline int usb_raw_io_flags_zero(__u16 flags) |
| { |
| return (flags & USB_RAW_IO_FLAGS_ZERO); |
| } |
| |
| /* |
| * struct usb_raw_ep_io - argument for USB_RAW_IOCTL_EP0/EP_WRITE/READ ioctls. |
| * @ep: Endpoint handle as returned by USB_RAW_IOCTL_EP_ENABLE for |
| * USB_RAW_IOCTL_EP_WRITE/READ. Ignored for USB_RAW_IOCTL_EP0_WRITE/READ. |
| * @flags: When USB_RAW_IO_FLAGS_ZERO is specified, the zero flag is set on |
| * the submitted USB request, see include/linux/usb/gadget.h for details. |
| * @length: Length of data. |
| * @data: Data to send for USB_RAW_IOCTL_EP0/EP_WRITE. Buffer to store received |
| * data for USB_RAW_IOCTL_EP0/EP_READ. |
| */ |
| struct usb_raw_ep_io { |
| __u16 ep; |
| __u16 flags; |
| __u32 length; |
| __u8 data[0]; |
| }; |
| |
| /* |
| * Initializes a Raw Gadget instance. |
| * Accepts a pointer to the usb_raw_init struct as an argument. |
| * Returns 0 on success or negative error code on failure. |
| */ |
| #define USB_RAW_IOCTL_INIT _IOW('U', 0, struct usb_raw_init) |
| |
| /* |
| * Instructs Raw Gadget to bind to a UDC and start emulating a USB device. |
| * Returns 0 on success or negative error code on failure. |
| */ |
| #define USB_RAW_IOCTL_RUN _IO('U', 1) |
| |
| /* |
| * A blocking ioctl that waits for an event and returns fetched event data to |
| * the user. |
| * Accepts a pointer to the usb_raw_event struct. |
| * Returns 0 on success or negative error code on failure. |
| */ |
| #define USB_RAW_IOCTL_EVENT_FETCH _IOR('U', 2, struct usb_raw_event) |
| |
| /* |
| * Queues an IN (OUT for READ) urb as a response to the last control request |
| * received on endpoint 0, provided that was an IN (OUT for READ) request and |
| * waits until the urb is completed. Copies received data to user for READ. |
| * Accepts a pointer to the usb_raw_ep_io struct as an argument. |
| * Returns length of trasferred data on success or negative error code on |
| * failure. |
| */ |
| #define USB_RAW_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_raw_ep_io) |
| #define USB_RAW_IOCTL_EP0_READ _IOWR('U', 4, struct usb_raw_ep_io) |
| |
| /* |
| * Finds an endpoint that supports the transfer type specified in the |
| * descriptor and enables it. |
| * Accepts a pointer to the usb_endpoint_descriptor struct as an argument. |
| * Returns enabled endpoint handle on success or negative error code on failure. |
| */ |
| #define USB_RAW_IOCTL_EP_ENABLE _IOW('U', 5, struct usb_endpoint_descriptor) |
| |
| /* Disables specified endpoint. |
| * Accepts endpoint handle as an argument. |
| * Returns 0 on success or negative error code on failure. |
| */ |
| #define USB_RAW_IOCTL_EP_DISABLE _IOW('U', 6, __u32) |
| |
| /* |
| * Queues an IN (OUT for READ) urb as a response to the last control request |
| * received on endpoint usb_raw_ep_io.ep, provided that was an IN (OUT for READ) |
| * request and waits until the urb is completed. Copies received data to user |
| * for READ. |
| * Accepts a pointer to the usb_raw_ep_io struct as an argument. |
| * Returns length of trasferred data on success or negative error code on |
| * failure. |
| */ |
| #define USB_RAW_IOCTL_EP_WRITE _IOW('U', 7, struct usb_raw_ep_io) |
| #define USB_RAW_IOCTL_EP_READ _IOWR('U', 8, struct usb_raw_ep_io) |
| |
| /* |
| * Switches the gadget into the configured state. |
| * Returns 0 on success or negative error code on failure. |
| */ |
| #define USB_RAW_IOCTL_CONFIGURE _IO('U', 9) |
| |
| /* |
| * Constrains UDC VBUS power usage. |
| * Accepts current limit in 2 mA units as an argument. |
| * Returns 0 on success or negative error code on failure. |
| */ |
| #define USB_RAW_IOCTL_VBUS_DRAW _IOW('U', 10, __u32) |
| |
| #endif /* _UAPI__LINUX_USB_RAW_GADGET_H */ |