1*b843c749SSergey Zigachev /* 2*b843c749SSergey Zigachev * Copyright 2012-15 Advanced Micro Devices, Inc. 3*b843c749SSergey Zigachev * 4*b843c749SSergey Zigachev * Permission is hereby granted, free of charge, to any person obtaining a 5*b843c749SSergey Zigachev * copy of this software and associated documentation files (the "Software"), 6*b843c749SSergey Zigachev * to deal in the Software without restriction, including without limitation 7*b843c749SSergey Zigachev * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8*b843c749SSergey Zigachev * and/or sell copies of the Software, and to permit persons to whom the 9*b843c749SSergey Zigachev * Software is furnished to do so, subject to the following conditions: 10*b843c749SSergey Zigachev * 11*b843c749SSergey Zigachev * The above copyright notice and this permission notice shall be included in 12*b843c749SSergey Zigachev * all copies or substantial portions of the Software. 13*b843c749SSergey Zigachev * 14*b843c749SSergey Zigachev * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15*b843c749SSergey Zigachev * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16*b843c749SSergey Zigachev * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17*b843c749SSergey Zigachev * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18*b843c749SSergey Zigachev * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19*b843c749SSergey Zigachev * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20*b843c749SSergey Zigachev * OTHER DEALINGS IN THE SOFTWARE. 21*b843c749SSergey Zigachev * 22*b843c749SSergey Zigachev * Authors: AMD 23*b843c749SSergey Zigachev * 24*b843c749SSergey Zigachev */ 25*b843c749SSergey Zigachev 26*b843c749SSergey Zigachev #ifndef __DAL_I2CAUX_INTERFACE_H__ 27*b843c749SSergey Zigachev #define __DAL_I2CAUX_INTERFACE_H__ 28*b843c749SSergey Zigachev 29*b843c749SSergey Zigachev #include "dc_types.h" 30*b843c749SSergey Zigachev #include "gpio_service_interface.h" 31*b843c749SSergey Zigachev 32*b843c749SSergey Zigachev 33*b843c749SSergey Zigachev #define DEFAULT_AUX_MAX_DATA_SIZE 16 34*b843c749SSergey Zigachev #define AUX_MAX_DEFER_WRITE_RETRY 20 35*b843c749SSergey Zigachev 36*b843c749SSergey Zigachev struct aux_payload { 37*b843c749SSergey Zigachev /* set following flag to read/write I2C data, 38*b843c749SSergey Zigachev * reset it to read/write DPCD data */ 39*b843c749SSergey Zigachev bool i2c_over_aux; 40*b843c749SSergey Zigachev /* set following flag to write data, 41*b843c749SSergey Zigachev * reset it to read data */ 42*b843c749SSergey Zigachev bool write; 43*b843c749SSergey Zigachev uint32_t address; 44*b843c749SSergey Zigachev uint8_t length; 45*b843c749SSergey Zigachev uint8_t *data; 46*b843c749SSergey Zigachev }; 47*b843c749SSergey Zigachev 48*b843c749SSergey Zigachev struct aux_command { 49*b843c749SSergey Zigachev struct aux_payload *payloads; 50*b843c749SSergey Zigachev uint8_t number_of_payloads; 51*b843c749SSergey Zigachev 52*b843c749SSergey Zigachev /* expressed in milliseconds 53*b843c749SSergey Zigachev * zero means "use default value" */ 54*b843c749SSergey Zigachev uint32_t defer_delay; 55*b843c749SSergey Zigachev 56*b843c749SSergey Zigachev /* zero means "use default value" */ 57*b843c749SSergey Zigachev uint32_t max_defer_write_retry; 58*b843c749SSergey Zigachev 59*b843c749SSergey Zigachev enum i2c_mot_mode mot; 60*b843c749SSergey Zigachev }; 61*b843c749SSergey Zigachev 62*b843c749SSergey Zigachev union aux_config { 63*b843c749SSergey Zigachev struct { 64*b843c749SSergey Zigachev uint32_t ALLOW_AUX_WHEN_HPD_LOW:1; 65*b843c749SSergey Zigachev } bits; 66*b843c749SSergey Zigachev uint32_t raw; 67*b843c749SSergey Zigachev }; 68*b843c749SSergey Zigachev 69*b843c749SSergey Zigachev struct i2caux; 70*b843c749SSergey Zigachev 71*b843c749SSergey Zigachev struct i2caux *dal_i2caux_create( 72*b843c749SSergey Zigachev struct dc_context *ctx); 73*b843c749SSergey Zigachev 74*b843c749SSergey Zigachev bool dal_i2caux_submit_i2c_command( 75*b843c749SSergey Zigachev struct i2caux *i2caux, 76*b843c749SSergey Zigachev struct ddc *ddc, 77*b843c749SSergey Zigachev struct i2c_command *cmd); 78*b843c749SSergey Zigachev 79*b843c749SSergey Zigachev bool dal_i2caux_submit_aux_command( 80*b843c749SSergey Zigachev struct i2caux *i2caux, 81*b843c749SSergey Zigachev struct ddc *ddc, 82*b843c749SSergey Zigachev struct aux_command *cmd); 83*b843c749SSergey Zigachev 84*b843c749SSergey Zigachev void dal_i2caux_configure_aux( 85*b843c749SSergey Zigachev struct i2caux *i2caux, 86*b843c749SSergey Zigachev struct ddc *ddc, 87*b843c749SSergey Zigachev union aux_config cfg); 88*b843c749SSergey Zigachev 89*b843c749SSergey Zigachev void dal_i2caux_destroy( 90*b843c749SSergey Zigachev struct i2caux **ptr); 91*b843c749SSergey Zigachev 92*b843c749SSergey Zigachev #endif 93