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/*
* 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
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