1/*
 2 * Copyright 2012-15 Advanced Micro Devices, Inc.
 3 *
 4 * Permission is hereby granted, free of charge, to any person obtaining a
 5 * copy of this software and associated documentation files (the "Software"),
 6 * to deal in the Software without restriction, including without limitation
 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 8 * and/or sell copies of the Software, and to permit persons to whom the
 9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26#ifndef __DAL_I2CAUX_INTERFACE_H__
27#define __DAL_I2CAUX_INTERFACE_H__
28
29#include "dc_types.h"
30#include "gpio_service_interface.h"
31
32
33#define DEFAULT_AUX_MAX_DATA_SIZE 16
34#define AUX_MAX_DEFER_WRITE_RETRY 20
35
36struct aux_payload {
37	/* set following flag to read/write I2C data,
38	 * reset it to read/write DPCD data */
39	bool i2c_over_aux;
40	/* set following flag to write data,
41	 * reset it to read data */
42	bool write;
43	bool mot;
44	bool write_status_update;
45
46	uint32_t address;
47	uint32_t length;
48	uint8_t *data;
49	/*
50	 * used to return the reply type of the transaction
51	 * ignored if NULL
52	 */
53	uint8_t *reply;
54	/* expressed in milliseconds
55	 * zero means "use default value"
56	 */
57	uint32_t defer_delay;
58
59};
60
61struct aux_command {
62	struct aux_payload *payloads;
63	uint8_t number_of_payloads;
64
65	/* expressed in milliseconds
66	 * zero means "use default value" */
67	uint32_t defer_delay;
68
69	/* zero means "use default value" */
70	uint32_t max_defer_write_retry;
71
72	enum i2c_mot_mode mot;
73};
74
75union aux_config {
76	struct {
77		uint32_t ALLOW_AUX_WHEN_HPD_LOW:1;
78	} bits;
79	uint32_t raw;
80};
81
82#endif