| /* |
| * Copyright 2012-15 Advanced Micro Devices, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: AMD |
| * |
| */ |
| |
| #ifndef __DAL_I2C_HW_ENGINE_H__ |
| #define __DAL_I2C_HW_ENGINE_H__ |
| |
| enum { |
| TRANSACTION_TIMEOUT_IN_I2C_CLOCKS = 32 |
| }; |
| |
| struct i2c_hw_engine; |
| |
| struct i2c_hw_engine_funcs { |
| uint32_t (*get_hw_buffer_available_size)( |
| const struct i2c_hw_engine *engine); |
| enum i2c_channel_operation_result (*wait_on_operation_result)( |
| struct i2c_hw_engine *engine, |
| uint32_t timeout, |
| enum i2c_channel_operation_result expected_result); |
| uint32_t (*get_transaction_timeout)( |
| const struct i2c_hw_engine *engine, |
| uint32_t length); |
| }; |
| |
| struct i2c_hw_engine { |
| struct i2c_engine base; |
| const struct i2c_hw_engine_funcs *funcs; |
| |
| /* Values below are in kilohertz */ |
| uint32_t original_speed; |
| uint32_t default_speed; |
| }; |
| |
| void dal_i2c_hw_engine_construct( |
| struct i2c_hw_engine *engine, |
| struct dc_context *ctx); |
| |
| void dal_i2c_hw_engine_destruct( |
| struct i2c_hw_engine *engine); |
| |
| enum i2c_channel_operation_result dal_i2c_hw_engine_wait_on_operation_result( |
| struct i2c_hw_engine *engine, |
| uint32_t timeout, |
| enum i2c_channel_operation_result expected_result); |
| |
| bool dal_i2c_hw_engine_acquire_engine( |
| struct i2c_engine *engine, |
| struct ddc *ddc); |
| |
| bool dal_i2c_hw_engine_submit_request( |
| struct engine *ptr, |
| struct i2caux_transaction_request *i2caux_request, |
| bool middle_of_transaction); |
| |
| enum i2caux_engine_type dal_i2c_hw_engine_get_engine_type( |
| const struct engine *engine); |
| |
| #endif |