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