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 36 struct 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 61 struct 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 75 union aux_config { 76 struct { 77 uint32_t ALLOW_AUX_WHEN_HPD_LOW:1; 78 } bits; 79 uint32_t raw; 80 }; 81 82 #endif 83