cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dp_hpd.h (2114B)

      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_irq: Change in the status since last message
     30 * @alt_mode_cfg_done: bool to specify alt mode status
     31 * @debug_en: bool to specify debug mode
     32 * @connect: simulate disconnect or connect for debug mode
     33 */
     34struct dp_usbpd {
     35	enum plug_orientation orientation;
     36	bool low_pow_st;
     37	bool adaptor_dp_en;
     38	bool multi_func;
     39	bool usb_config_req;
     40	bool exit_dp_mode;
     41	bool hpd_irq;
     42	bool alt_mode_cfg_done;
     43	bool debug_en;
     44
     45	int (*connect)(struct dp_usbpd *dp_usbpd, bool hpd);
     46};
     47
     48/**
     49 * struct dp_usbpd_cb - callback functions provided by the client
     50 *
     51 * @configure: called by usbpd module when PD communication has
     52 * been completed and the usb peripheral has been configured on
     53 * dp mode.
     54 * @disconnect: notify the cable disconnect issued by usb.
     55 * @attention: notify any attention message issued by usb.
     56 */
     57struct dp_usbpd_cb {
     58	int (*configure)(struct device *dev);
     59	int (*disconnect)(struct device *dev);
     60	int (*attention)(struct device *dev);
     61};
     62
     63/**
     64 * dp_hpd_get() - setup hpd module
     65 *
     66 * @dev: device instance of the caller
     67 * @cb: struct containing callback function pointers.
     68 *
     69 * This function allows the client to initialize the usbpd
     70 * module. The module will communicate with HPD module.
     71 */
     72struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb);
     73
     74int dp_hpd_register(struct dp_usbpd *dp_usbpd);
     75void dp_hpd_unregister(struct dp_usbpd *dp_usbpd);
     76int dp_hpd_connect(struct dp_usbpd *dp_usbpd, bool hpd);
     77
     78#endif /* _DP_HPD_H_ */