mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 00:39:33 +07:00
4035c5b5f2
In some places, the code prints a human-readable USB endpoint
transfer type (e.g. "bulk"). This involves a switch statement
sometimes wrapped around in ({ ... }) block leading to code
repetition.
To make this scenario easier, here introduces usb_ep_type_string()
function, which returns a human-readable name of provided
endpoint type.
It also changes a few places switch was used to use this
new function.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
74 lines
2.9 KiB
C
74 lines
2.9 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 (spread around). Linux has several APIs in C that
|
|
* need these:
|
|
*
|
|
* - the master/host side Linux-USB kernel driver API;
|
|
* - the "usbfs" user space API; and
|
|
* - the Linux "gadget" slave/device/peripheral side driver API.
|
|
*
|
|
* USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
|
|
* act either as a USB master/host or as a USB slave/device. That means
|
|
* the master and slave side APIs benefit from working well together.
|
|
*
|
|
* There's also "Wireless USB", using low power short range radios for
|
|
* peripheral interconnection but otherwise building on the USB framework.
|
|
*
|
|
* 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 <linux/device.h>
|
|
#include <uapi/linux/usb/ch9.h>
|
|
|
|
/**
|
|
* usb_ep_type_string() - Returns human readable-name of the endpoint type.
|
|
* @ep_type: The endpoint type to return human-readable name for. If it's not
|
|
* any of the types: USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT},
|
|
* usually got by usb_endpoint_type(), the string 'unknown' will be returned.
|
|
*/
|
|
extern const char *usb_ep_type_string(int ep_type);
|
|
|
|
/**
|
|
* usb_speed_string() - Returns human readable-name of the speed.
|
|
* @speed: The speed to return human-readable name for. If it's not
|
|
* any of the speeds defined in usb_device_speed enum, string for
|
|
* USB_SPEED_UNKNOWN will be returned.
|
|
*/
|
|
extern const char *usb_speed_string(enum usb_device_speed speed);
|
|
|
|
/**
|
|
* usb_get_maximum_speed - Get maximum requested speed for a given USB
|
|
* controller.
|
|
* @dev: Pointer to the given USB controller device
|
|
*
|
|
* The function gets the maximum speed string from property "maximum-speed",
|
|
* and returns the corresponding enum usb_device_speed.
|
|
*/
|
|
extern enum usb_device_speed usb_get_maximum_speed(struct device *dev);
|
|
|
|
/**
|
|
* usb_state_string - Returns human readable name for the state.
|
|
* @state: The state to return a human-readable name for. If it's not
|
|
* any of the states devices in usb_device_state_string enum,
|
|
* the string UNKNOWN will be returned.
|
|
*/
|
|
extern const char *usb_state_string(enum usb_device_state state);
|
|
|
|
#endif /* __LINUX_USB_CH9_H */
|