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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2022 Samsung Electronics Co., Ltd.
*
* Samsung DisplayPort driver.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __EXYNOS_HDCP2_AUTH_INTERNAL_H__
#define __EXYNOS_HDCP2_AUTH_INTERNAL_H__
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/mutex.h>
#include <linux/module.h>
#define HDCP_LINK_TYPE_DP 1
static char *hdcp_link_st_str[] = {
"ST_INIT",
"ST_H0_NO_RX_ATTACHED",
"ST_H1_TX_LOW_VALUE_CONTENT",
"ST_A0_DETERMINE_RX_HDCP_CAP",
"ST_A1_EXCHANGE_MASTER_KEY",
"ST_A2_LOCALITY_CHECK",
"ST_A3_EXCHANGE_SESSION_KEY",
"ST_A4_TEST_REPEATER",
"ST_A5_AUTHENTICATED",
"ST_A6_WAIT_RECEIVER_ID_LIST",
"ST_A7_VERIFY_RECEIVER_ID_LIST",
"ST_A8_SEND_RECEIVER_ID_LIST_ACK",
"ST_A9_CONTENT_STREAM_MGT",
"ST_END",
NULL
};
typedef enum hdcp_tx_hdcp_link_state {
LINK_ST_INIT = 0,
LINK_ST_H0_NO_RX_ATTACHED,
LINK_ST_H1_TX_LOW_VALUE_CONTENT,
LINK_ST_A0_DETERMINE_RX_HDCP_CAP,
LINK_ST_A1_EXCHANGE_MASTER_KEY,
LINK_ST_A2_LOCALITY_CHECK,
LINK_ST_A3_EXCHANGE_SESSION_KEY,
LINK_ST_A4_TEST_REPEATER,
LINK_ST_A5_AUTHENTICATED,
LINK_ST_A6_WAIT_RECEIVER_ID_LIST,
LINK_ST_A7_VERIFY_RECEIVER_ID_LIST,
LINK_ST_A8_SEND_RECEIVER_ID_LIST_ACK,
LINK_ST_A9_CONTENT_STREAM_MGT,
LINK_ST_END
} hdcp_tx_hdcp_link_state;
#define UPDATE_LINK_STATE(link, st) do { \
hdcp_info("HDCP Link: %s -> %s\n", hdcp_link_st_str[link->state], hdcp_link_st_str[st]); \
link->state = st; \
} while (0)
struct hdcp_link_data {
uint32_t state;
bool is_repeater;
bool is_aborted;
bool is_stored_km;
bool pairing_ready;
bool hprime_ready;
bool rp_ready;
};
int auth22_exchange_master_key(struct hdcp_link_data *lk);
int auth22_locality_check(struct hdcp_link_data *lk);
int auth22_exchange_session_key(struct hdcp_link_data *lk);
int auth22_wait_for_receiver_id_list(struct hdcp_link_data *lk);
int auth22_verify_receiver_id_list(struct hdcp_link_data *lk);
int auth22_stream_manage(struct hdcp_link_data *lk);
#endif
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