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 uint32_t address; 45 uint32_t length; 46 uint8_t *data; 47 /* 48 * used to return the reply type of the transaction 49 * ignored if NULL 50 */ 51 uint8_t *reply; 52 /* expressed in milliseconds 53 * zero means "use default value" 54 */ 55 uint32_t defer_delay; 56 }; 57 58 struct aux_command { 59 struct aux_payload *payloads; 60 uint8_t number_of_payloads; 61 62 /* expressed in milliseconds 63 * zero means "use default value" */ 64 uint32_t defer_delay; 65 66 /* zero means "use default value" */ 67 uint32_t max_defer_write_retry; 68 69 enum i2c_mot_mode mot; 70 }; 71 72 union aux_config { 73 struct { 74 uint32_t ALLOW_AUX_WHEN_HPD_LOW:1; 75 } bits; 76 uint32_t raw; 77 }; 78 79 #endif 80