1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
 4 */
 5
 6#ifndef _DP_HPD_H_
 7#define _DP_HPD_H_
 8
 9//#include <linux/usb/usbpd.h>
10
11#include <linux/types.h>
12#include <linux/device.h>
13
14enum plug_orientation {
15	ORIENTATION_NONE,
16	ORIENTATION_CC1,
17	ORIENTATION_CC2,
18};
19
20/**
21 * struct dp_usbpd - DisplayPort status
22 *
23 * @orientation: plug orientation configuration
24 * @low_pow_st: low power state
25 * @adaptor_dp_en: adaptor functionality enabled
26 * @multi_func: multi-function preferred
27 * @usb_config_req: request to switch to usb
28 * @exit_dp_mode: request exit from displayport mode
29 * @hpd_high: Hot Plug Detect signal is high.
30 * @hpd_irq: Change in the status since last message
31 * @alt_mode_cfg_done: bool to specify alt mode status
32 * @debug_en: bool to specify debug mode
33 * @connect: simulate disconnect or connect for debug mode
34 */
35struct dp_usbpd {
36	enum plug_orientation orientation;
37	bool low_pow_st;
38	bool adaptor_dp_en;
39	bool multi_func;
40	bool usb_config_req;
41	bool exit_dp_mode;
42	bool hpd_high;
43	bool hpd_irq;
44	bool alt_mode_cfg_done;
45	bool debug_en;
46
47	int (*connect)(struct dp_usbpd *dp_usbpd, bool hpd);
48};
49
50/**
51 * struct dp_usbpd_cb - callback functions provided by the client
52 *
53 * @configure: called by usbpd module when PD communication has
54 * been completed and the usb peripheral has been configured on
55 * dp mode.
56 * @disconnect: notify the cable disconnect issued by usb.
57 * @attention: notify any attention message issued by usb.
58 */
59struct dp_usbpd_cb {
60	int (*configure)(struct device *dev);
61	int (*disconnect)(struct device *dev);
62	int (*attention)(struct device *dev);
63};
64
65/**
66 * dp_hpd_get() - setup hpd module
67 *
68 * @dev: device instance of the caller
69 * @cb: struct containing callback function pointers.
70 *
71 * This function allows the client to initialize the usbpd
72 * module. The module will communicate with HPD module.
73 */
74struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb);
75
76int dp_hpd_register(struct dp_usbpd *dp_usbpd);
77void dp_hpd_unregister(struct dp_usbpd *dp_usbpd);
78int dp_hpd_connect(struct dp_usbpd *dp_usbpd, bool hpd);
79
80#endif /* _DP_HPD_H_ */