250 lines
8.1 KiB
C
250 lines
8.1 KiB
C
/* 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];
|
|
};
|
|
|
|
/* Maximum number of non-control endpoints in struct usb_raw_eps_info. */
|
|
#define USB_RAW_EPS_NUM_MAX 30
|
|
|
|
/* Maximum length of UDC endpoint name in struct usb_raw_ep_info. */
|
|
#define USB_RAW_EP_NAME_MAX 16
|
|
|
|
/* Used as addr in struct usb_raw_ep_info if endpoint accepts any address. */
|
|
#define USB_RAW_EP_ADDR_ANY 0xff
|
|
|
|
/*
|
|
* struct usb_raw_ep_caps - exposes endpoint capabilities from struct usb_ep
|
|
* (technically from its member struct usb_ep_caps).
|
|
*/
|
|
struct usb_raw_ep_caps {
|
|
__u32 type_control : 1;
|
|
__u32 type_iso : 1;
|
|
__u32 type_bulk : 1;
|
|
__u32 type_int : 1;
|
|
__u32 dir_in : 1;
|
|
__u32 dir_out : 1;
|
|
};
|
|
|
|
/*
|
|
* struct usb_raw_ep_limits - exposes endpoint limits from struct usb_ep.
|
|
* @maxpacket_limit: Maximum packet size value supported by this endpoint.
|
|
* @max_streams: maximum number of streams supported by this endpoint
|
|
* (actual number is 2^n).
|
|
* @reserved: Empty, reserved for potential future extensions.
|
|
*/
|
|
struct usb_raw_ep_limits {
|
|
__u16 maxpacket_limit;
|
|
__u16 max_streams;
|
|
__u32 reserved;
|
|
};
|
|
|
|
/*
|
|
* struct usb_raw_ep_info - stores information about a gadget endpoint.
|
|
* @name: Name of the endpoint as it is defined in the UDC driver.
|
|
* @addr: Address of the endpoint that must be specified in the endpoint
|
|
* descriptor passed to USB_RAW_IOCTL_EP_ENABLE ioctl.
|
|
* @caps: Endpoint capabilities.
|
|
* @limits: Endpoint limits.
|
|
*/
|
|
struct usb_raw_ep_info {
|
|
__u8 name[USB_RAW_EP_NAME_MAX];
|
|
__u32 addr;
|
|
struct usb_raw_ep_caps caps;
|
|
struct usb_raw_ep_limits limits;
|
|
};
|
|
|
|
/*
|
|
* struct usb_raw_eps_info - argument for USB_RAW_IOCTL_EPS_INFO ioctl.
|
|
* eps: Structures that store information about non-control endpoints.
|
|
*/
|
|
struct usb_raw_eps_info {
|
|
struct usb_raw_ep_info eps[USB_RAW_EPS_NUM_MAX];
|
|
};
|
|
|
|
/*
|
|
* 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) request as a response to the last setup request
|
|
* received on endpoint 0 (provided that was an IN (OUT for READ) request), and
|
|
* waits until the request 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 transferred 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 satisfies the parameters specified in the provided
|
|
* descriptors (address, transfer type, etc.) and enables it.
|
|
* Accepts a pointer to the usb_raw_ep_descs 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) request as a response to the last setup request
|
|
* received on endpoint usb_raw_ep_io.ep (provided that was an IN (OUT for READ)
|
|
* request), and waits until the request 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 transferred 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)
|
|
|
|
/*
|
|
* Fills in the usb_raw_eps_info structure with information about non-control
|
|
* endpoints available for the currently connected UDC.
|
|
* Returns the number of available endpoints on success or negative error code
|
|
* on failure.
|
|
*/
|
|
#define USB_RAW_IOCTL_EPS_INFO _IOR('U', 11, struct usb_raw_eps_info)
|
|
|
|
/*
|
|
* Stalls a pending control request on endpoint 0.
|
|
* Returns 0 on success or negative error code on failure.
|
|
*/
|
|
#define USB_RAW_IOCTL_EP0_STALL _IO('U', 12)
|
|
|
|
/*
|
|
* Sets or clears halt or wedge status of the endpoint.
|
|
* Accepts endpoint handle as an argument.
|
|
* Returns 0 on success or negative error code on failure.
|
|
*/
|
|
#define USB_RAW_IOCTL_EP_SET_HALT _IOW('U', 13, __u32)
|
|
#define USB_RAW_IOCTL_EP_CLEAR_HALT _IOW('U', 14, __u32)
|
|
#define USB_RAW_IOCTL_EP_SET_WEDGE _IOW('U', 15, __u32)
|
|
|
|
#endif /* _UAPI__LINUX_USB_RAW_GADGET_H */
|