mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-29 20:30:35 +00:00
1e4c574225
Wireless USB has long been defunct, and kernel support for it was
removed in 2020 by commit caa6772db4 ("Staging: remove wusbcore and
UWB from the kernel tree.").
Nevertheless, some vestiges of the old implementation still clutter up
the USB subsystem and one or two other places. Let's get rid of them
once and for all.
The only parts still left are the user-facing APIs in
include/uapi/linux/usb/ch9.h. (There are also a couple of misleading
instances, such as the Sierra Wireless USB modem, which is a USB modem
made by Sierra Wireless.)
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/b4f2710f-a2de-4fb0-b50f-76776f3a961b@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/* 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_TRACING
|
|
extern 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 */
|