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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_ENGINE_H__
#define __DAL_I2C_ENGINE_H__
enum i2c_channel_operation_result {
I2C_CHANNEL_OPERATION_SUCCEEDED,
I2C_CHANNEL_OPERATION_FAILED,
I2C_CHANNEL_OPERATION_NOT_GRANTED,
I2C_CHANNEL_OPERATION_IS_BUSY,
I2C_CHANNEL_OPERATION_NO_HANDLE_PROVIDED,
I2C_CHANNEL_OPERATION_CHANNEL_IN_USE,
I2C_CHANNEL_OPERATION_CHANNEL_CLIENT_MAX_ALLOWED,
I2C_CHANNEL_OPERATION_ENGINE_BUSY,
I2C_CHANNEL_OPERATION_TIMEOUT,
I2C_CHANNEL_OPERATION_NO_RESPONSE,
I2C_CHANNEL_OPERATION_HW_REQUEST_I2C_BUS,
I2C_CHANNEL_OPERATION_WRONG_PARAMETER,
I2C_CHANNEL_OPERATION_OUT_NB_OF_RETRIES,
I2C_CHANNEL_OPERATION_NOT_STARTED
};
struct i2c_request_transaction_data {
enum i2caux_transaction_action action;
enum i2c_channel_operation_result status;
uint8_t address;
uint32_t length;
uint8_t *data;
};
struct i2c_reply_transaction_data {
uint32_t length;
uint8_t *data;
};
struct i2c_engine;
struct i2c_engine_funcs {
void (*destroy)(
struct i2c_engine **ptr);
uint32_t (*get_speed)(
const struct i2c_engine *engine);
void (*set_speed)(
struct i2c_engine *engine,
uint32_t speed);
bool (*acquire_engine)(
struct i2c_engine *engine,
struct ddc *ddc);
bool (*setup_engine)(
struct i2c_engine *engine);
void (*submit_channel_request)(
struct i2c_engine *engine,
struct i2c_request_transaction_data *request);
void (*process_channel_reply)(
struct i2c_engine *engine,
struct i2c_reply_transaction_data *reply);
enum i2c_channel_operation_result (*get_channel_status)(
struct i2c_engine *engine,
uint8_t *returned_bytes);
};
struct i2c_engine {
struct engine base;
const struct i2c_engine_funcs *funcs;
uint32_t timeout_delay;
};
void dal_i2c_engine_construct(
struct i2c_engine *engine,
struct dc_context *ctx);
void dal_i2c_engine_destruct(
struct i2c_engine *engine);
bool dal_i2c_engine_setup_i2c_engine(
struct i2c_engine *engine);
void dal_i2c_engine_submit_channel_request(
struct i2c_engine *engine,
struct i2c_request_transaction_data *request);
void dal_i2c_engine_process_channel_reply(
struct i2c_engine *engine,
struct i2c_reply_transaction_data *reply);
bool dal_i2c_engine_acquire(
struct engine *ptr,
struct ddc *ddc_handle);
#endif
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