blob: c05ffa6abda9f8250a84af7cd164ea381c5413c2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
// SPDX-License-Identifier: GPL-2.0
#ifndef __LINUX_USB_ROLE_H
#define __LINUX_USB_ROLE_H
#include <linux/device.h>
struct usb_role_switch;
enum usb_role {
USB_ROLE_NONE,
USB_ROLE_HOST,
USB_ROLE_DEVICE,
};
typedef int (*usb_role_switch_set_t)(struct device *dev, enum usb_role role);
typedef enum usb_role (*usb_role_switch_get_t)(struct device *dev);
/**
* struct usb_role_switch_desc - USB Role Switch Descriptor
* @fwnode: The device node to be associated with the role switch
* @usb2_port: Optional reference to the host controller port device (USB2)
* @usb3_port: Optional reference to the host controller port device (USB3)
* @udc: Optional reference to the peripheral controller device
* @set: Callback for setting the role
* @get: Callback for getting the role (optional)
* @allow_userspace_control: If true userspace may change the role through sysfs
*
* @usb2_port and @usb3_port will point to the USB host port and @udc to the USB
* device controller behind the USB connector with the role switch. If
* @usb2_port, @usb3_port and @udc are included in the description, the
* reference count for them should be incremented by the caller of
* usb_role_switch_register() before registering the switch.
*/
struct usb_role_switch_desc {
struct fwnode_handle *fwnode;
struct device *usb2_port;
struct device *usb3_port;
struct device *udc;
usb_role_switch_set_t set;
usb_role_switch_get_t get;
bool allow_userspace_control;
};
int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role);
enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw);
struct usb_role_switch *usb_role_switch_get(struct device *dev);
void usb_role_switch_put(struct usb_role_switch *sw);
struct usb_role_switch *
usb_role_switch_register(struct device *parent,
const struct usb_role_switch_desc *desc);
void usb_role_switch_unregister(struct usb_role_switch *sw);
#endif /* __LINUX_USB_ROLE_H */
|
