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_I2C_SW_ENGINE_H__ 27*b843c749SSergey Zigachev #define __DAL_I2C_SW_ENGINE_H__ 28*b843c749SSergey Zigachev 29*b843c749SSergey Zigachev enum { 30*b843c749SSergey Zigachev I2C_SW_RETRIES = 10, 31*b843c749SSergey Zigachev I2C_SW_SCL_READ_RETRIES = 128, 32*b843c749SSergey Zigachev /* following value is in microseconds */ 33*b843c749SSergey Zigachev I2C_SW_TIMEOUT_DELAY = 3000 34*b843c749SSergey Zigachev }; 35*b843c749SSergey Zigachev 36*b843c749SSergey Zigachev struct i2c_sw_engine; 37*b843c749SSergey Zigachev 38*b843c749SSergey Zigachev struct i2c_sw_engine { 39*b843c749SSergey Zigachev struct i2c_engine base; 40*b843c749SSergey Zigachev uint32_t clock_delay; 41*b843c749SSergey Zigachev /* Values below are in KHz */ 42*b843c749SSergey Zigachev uint32_t speed; 43*b843c749SSergey Zigachev uint32_t default_speed; 44*b843c749SSergey Zigachev }; 45*b843c749SSergey Zigachev 46*b843c749SSergey Zigachev struct i2c_sw_engine_create_arg { 47*b843c749SSergey Zigachev uint32_t default_speed; 48*b843c749SSergey Zigachev struct dc_context *ctx; 49*b843c749SSergey Zigachev }; 50*b843c749SSergey Zigachev 51*b843c749SSergey Zigachev void dal_i2c_sw_engine_construct( 52*b843c749SSergey Zigachev struct i2c_sw_engine *engine, 53*b843c749SSergey Zigachev const struct i2c_sw_engine_create_arg *arg); 54*b843c749SSergey Zigachev 55*b843c749SSergey Zigachev bool dal_i2caux_i2c_sw_engine_acquire_engine( 56*b843c749SSergey Zigachev struct i2c_engine *engine, 57*b843c749SSergey Zigachev struct ddc *ddc_handle); 58*b843c749SSergey Zigachev 59*b843c749SSergey Zigachev void dal_i2c_sw_engine_destruct( 60*b843c749SSergey Zigachev struct i2c_sw_engine *engine); 61*b843c749SSergey Zigachev 62*b843c749SSergey Zigachev struct i2c_engine *dal_i2c_sw_engine_create( 63*b843c749SSergey Zigachev const struct i2c_sw_engine_create_arg *arg); 64*b843c749SSergey Zigachev enum i2caux_engine_type dal_i2c_sw_engine_get_engine_type( 65*b843c749SSergey Zigachev const struct engine *engine); 66*b843c749SSergey Zigachev bool dal_i2c_sw_engine_submit_request( 67*b843c749SSergey Zigachev struct engine *ptr, 68*b843c749SSergey Zigachev struct i2caux_transaction_request *i2caux_request, 69*b843c749SSergey Zigachev bool middle_of_transaction); 70*b843c749SSergey Zigachev uint32_t dal_i2c_sw_engine_get_speed( 71*b843c749SSergey Zigachev const struct i2c_engine *engine); 72*b843c749SSergey Zigachev void dal_i2c_sw_engine_set_speed( 73*b843c749SSergey Zigachev struct i2c_engine *ptr, 74*b843c749SSergey Zigachev uint32_t speed); 75*b843c749SSergey Zigachev void dal_i2c_sw_engine_submit_channel_request( 76*b843c749SSergey Zigachev struct i2c_engine *ptr, 77*b843c749SSergey Zigachev struct i2c_request_transaction_data *req); 78*b843c749SSergey Zigachev enum i2c_channel_operation_result dal_i2c_sw_engine_get_channel_status( 79*b843c749SSergey Zigachev struct i2c_engine *engine, 80*b843c749SSergey Zigachev uint8_t *returned_bytes); 81*b843c749SSergey Zigachev #endif 82