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