tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2019 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 */
23
24#ifndef _TA_SECUREDISPLAY_IF_H
25#define _TA_SECUREDISPLAY_IF_H
26
27/** Secure Display related enumerations */
28/**********************************************************/
29
30/** @enum ta_securedisplay_command
31 * Secure Display Command ID
32 */
33enum ta_securedisplay_command {
34 /* Query whether TA is responding. It is used only for validation purpose */
35 TA_SECUREDISPLAY_COMMAND__QUERY_TA = 1,
36 /* Send region of Interest and CRC value to I2C */
37 TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC = 2,
38 /* V2 to send multiple regions of Interest and CRC value to I2C */
39 TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC_V2 = 3,
40 /* Maximum Command ID */
41 TA_SECUREDISPLAY_COMMAND__MAX_ID = 0x7FFFFFFF,
42};
43
44/** @enum ta_securedisplay_status
45 * Secure Display status returns in shared buffer status
46 */
47enum ta_securedisplay_status {
48 TA_SECUREDISPLAY_STATUS__SUCCESS = 0x00, /* Success */
49 TA_SECUREDISPLAY_STATUS__GENERIC_FAILURE = 0x01, /* Generic Failure */
50 TA_SECUREDISPLAY_STATUS__INVALID_PARAMETER = 0x02, /* Invalid Parameter */
51 TA_SECUREDISPLAY_STATUS__NULL_POINTER = 0x03, /* Null Pointer*/
52 TA_SECUREDISPLAY_STATUS__I2C_WRITE_ERROR = 0x04, /* Fail to Write to I2C */
53 TA_SECUREDISPLAY_STATUS__READ_DIO_SCRATCH_ERROR = 0x05, /*Fail Read DIO Scratch Register*/
54 TA_SECUREDISPLAY_STATUS__READ_CRC_ERROR = 0x06, /* Fail to Read CRC*/
55 TA_SECUREDISPLAY_STATUS__I2C_INIT_ERROR = 0x07, /* Failed to initialize I2C */
56
57 TA_SECUREDISPLAY_STATUS__MAX = 0x7FFFFFFF,/* Maximum Value for status*/
58};
59
60/** @enum ta_securedisplay_phy_ID
61 * Physical ID number to use for reading corresponding DIO Scratch register for ROI
62 */
63enum ta_securedisplay_phy_ID {
64 TA_SECUREDISPLAY_PHY0 = 0,
65 TA_SECUREDISPLAY_PHY1 = 1,
66 TA_SECUREDISPLAY_PHY2 = 2,
67 TA_SECUREDISPLAY_PHY3 = 3,
68 TA_SECUREDISPLAY_MAX_PHY = 4,
69};
70
71/** @enum ta_securedisplay_ta_query_cmd_ret
72 * A predefined specific reteurn value which is 0xAB only used to validate
73 * communication to Secure Display TA is functional.
74 * This value is used to validate whether TA is responding successfully
75 */
76enum ta_securedisplay_ta_query_cmd_ret {
77 /* This is a value to validate if TA is loaded successfully */
78 TA_SECUREDISPLAY_QUERY_CMD_RET = 0xAB,
79};
80
81/** @enum ta_securedisplay_buffer_size
82 * I2C Buffer size which contains 8 bytes of ROI (X start, X end, Y start, Y end)
83 * and 6 bytes of CRC( R,G,B) and 1 byte for physical ID
84 */
85enum ta_securedisplay_buffer_size {
86 /* 15 bytes = 8 byte (ROI) + 6 byte(CRC) + 1 byte(phy_id) */
87 TA_SECUREDISPLAY_I2C_BUFFER_SIZE = 15,
88 /* 16 bytes = 8 byte (ROI) + 6 byte(CRC) + 1 byte(phy_id) + 1 byte(roi_idx) */
89 TA_SECUREDISPLAY_V2_I2C_BUFFER_SIZE = 16,
90};
91
92/** Input/output structures for Secure Display commands */
93/**********************************************************/
94/**
95 * Input structures
96 */
97
98/** @struct ta_securedisplay_send_roi_crc_input
99 * Physical ID to determine which DIO scratch register should be used to get ROI
100 */
101struct ta_securedisplay_send_roi_crc_input {
102 /* Physical ID */
103 uint32_t phy_id;
104};
105
106struct ta_securedisplay_send_roi_crc_v2_input {
107 /* Physical ID */
108 uint32_t phy_id;
109 /* Region of interest index */
110 uint8_t roi_idx;
111};
112
113/** @union ta_securedisplay_cmd_input
114 * Input buffer
115 */
116union ta_securedisplay_cmd_input {
117 /* send ROI and CRC input buffer format */
118 struct ta_securedisplay_send_roi_crc_input send_roi_crc;
119 /* send ROI and CRC input buffer format, v2 adds a ROI index */
120 struct ta_securedisplay_send_roi_crc_v2_input send_roi_crc_v2;
121 uint32_t reserved[4];
122};
123
124/**
125 * Output structures
126 */
127
128/** @struct ta_securedisplay_query_ta_output
129 * Output buffer format for query TA whether TA is responding used only for validation purpose
130 */
131struct ta_securedisplay_query_ta_output {
132 /* return value from TA when it is queried for validation purpose only */
133 uint32_t query_cmd_ret;
134};
135
136/** @struct ta_securedisplay_send_roi_crc_output
137 * Output buffer format for send ROI CRC command which will pass I2c buffer created inside TA
138 * and used to write to I2C used only for validation purpose
139 */
140struct ta_securedisplay_send_roi_crc_output {
141 uint8_t i2c_buf[TA_SECUREDISPLAY_I2C_BUFFER_SIZE]; /* I2C buffer */
142 uint8_t reserved;
143};
144
145struct ta_securedisplay_send_roi_crc_v2_output {
146 uint8_t i2c_buf[TA_SECUREDISPLAY_V2_I2C_BUFFER_SIZE]; /* I2C buffer */
147};
148
149/** @union ta_securedisplay_cmd_output
150 * Output buffer
151 */
152union ta_securedisplay_cmd_output {
153 /* Query TA output buffer format used only for validation purpose*/
154 struct ta_securedisplay_query_ta_output query_ta;
155 /* Send ROI CRC output buffer format used only for validation purpose */
156 struct ta_securedisplay_send_roi_crc_output send_roi_crc;
157 /* Send ROI CRC output buffer format used only for validation purpose */
158 struct ta_securedisplay_send_roi_crc_v2_output send_roi_crc_v2;
159 uint32_t reserved[4];
160};
161
162/** @struct ta_securedisplay_cmd
163* Secure display command which is shared buffer memory
164*/
165struct ta_securedisplay_cmd {
166 uint32_t cmd_id; /**< +0 Bytes Command ID */
167 enum ta_securedisplay_status status; /**< +4 Bytes Status code returned by the secure display TA */
168 uint32_t reserved[2]; /**< +8 Bytes Reserved */
169 union ta_securedisplay_cmd_input securedisplay_in_message; /**< +16 Bytes Command input buffer */
170 union ta_securedisplay_cmd_output securedisplay_out_message; /**< +32 Bytes Command output buffer */
171 /**@note Total 48 Bytes */
172};
173
174#endif //_TA_SECUREDISPLAY_IF_H
175