Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061/* SPDX-License-Identifier: GPL-2.0 *//* * This file holds USB constants and structures that are needed for * USB device APIs. These are used by the USB device model, which is * defined in chapter 9 of the USB 2.0 specification and in the * Wireless USB 1.0 spec (now defunct). Linux has several APIs in C that * need these: * * - the host side Linux-USB kernel driver API; * - the "usbfs" user space API; and * - the Linux "gadget" device/peripheral side driver API. * * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems * act either as a USB host or as a USB device. That means the host and * device side APIs benefit from working well together. * * Note all descriptors are declared '__attribute__((packed))' so that: * * [a] they never get padded, either internally (USB spec writers * probably handled that) or externally; * * [b] so that accessing bigger-than-a-bytes fields will never * generate bus errors on any platform, even when the location of * its descriptor inside a bundle isn't "naturally aligned", and * * [c] for consistency, removing all doubt even when it appears to * someone that the two other points are non-issues for that * particular descriptor type. */#ifndef __LINUX_USB_CH9_H#define __LINUX_USB_CH9_H
#include <uapi/linux/usb/ch9.h>
/* USB 3.2 SuperSpeed Plus phy signaling rate generation and lane count */
enum usb_ssp_rate { USB_SSP_GEN_UNKNOWN = 0, USB_SSP_GEN_2x1, USB_SSP_GEN_1x2, USB_SSP_GEN_2x2,};
struct device;
extern const char *usb_ep_type_string(int ep_type);extern const char *usb_speed_string(enum usb_device_speed speed);extern enum usb_device_speed usb_get_maximum_speed(struct device *dev);extern enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev);extern const char *usb_state_string(enum usb_device_state state);unsigned int usb_decode_interval(const struct usb_endpoint_descriptor *epd, enum usb_device_speed speed);
#ifdef CONFIG_TRACINGextern const char *usb_decode_ctrl(char *str, size_t size, __u8 bRequestType, __u8 bRequest, __u16 wValue, __u16 wIndex, __u16 wLength);#endif
#endif /* __LINUX_USB_CH9_H */