Signed-off-by: Charlene Liu <charlene.liu@amd.com> Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*
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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_ENGINE_H__
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#define __DAL_I2C_ENGINE_H__
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enum i2c_channel_operation_result {
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I2C_CHANNEL_OPERATION_SUCCEEDED,
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I2C_CHANNEL_OPERATION_FAILED,
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I2C_CHANNEL_OPERATION_NOT_GRANTED,
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I2C_CHANNEL_OPERATION_IS_BUSY,
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I2C_CHANNEL_OPERATION_NO_HANDLE_PROVIDED,
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I2C_CHANNEL_OPERATION_CHANNEL_IN_USE,
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I2C_CHANNEL_OPERATION_CHANNEL_CLIENT_MAX_ALLOWED,
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I2C_CHANNEL_OPERATION_ENGINE_BUSY,
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I2C_CHANNEL_OPERATION_TIMEOUT,
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I2C_CHANNEL_OPERATION_NO_RESPONSE,
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I2C_CHANNEL_OPERATION_HW_REQUEST_I2C_BUS,
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I2C_CHANNEL_OPERATION_WRONG_PARAMETER,
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I2C_CHANNEL_OPERATION_OUT_NB_OF_RETRIES,
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I2C_CHANNEL_OPERATION_NOT_STARTED
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};
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struct i2c_request_transaction_data {
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enum i2caux_transaction_action action;
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enum i2c_channel_operation_result status;
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uint8_t address;
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uint32_t length;
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uint8_t *data;
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};
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struct i2c_reply_transaction_data {
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uint32_t length;
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uint8_t *data;
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};
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struct i2c_engine;
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struct i2c_engine_funcs {
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void (*destroy)(
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struct i2c_engine **ptr);
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uint32_t (*get_speed)(
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const struct i2c_engine *engine);
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void (*set_speed)(
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struct i2c_engine *engine,
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uint32_t speed);
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bool (*acquire_engine)(
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struct i2c_engine *engine,
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struct ddc *ddc);
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bool (*setup_engine)(
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struct i2c_engine *engine);
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void (*submit_channel_request)(
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struct i2c_engine *engine,
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struct i2c_request_transaction_data *request);
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void (*process_channel_reply)(
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struct i2c_engine *engine,
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struct i2c_reply_transaction_data *reply);
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enum i2c_channel_operation_result (*get_channel_status)(
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struct i2c_engine *engine,
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uint8_t *returned_bytes);
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};
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struct i2c_engine {
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struct engine base;
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const struct i2c_engine_funcs *funcs;
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uint32_t timeout_delay;
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uint32_t setup_limit;
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uint32_t send_reset_length;
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};
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void dal_i2c_engine_construct(
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struct i2c_engine *engine,
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struct dc_context *ctx);
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void dal_i2c_engine_destruct(
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struct i2c_engine *engine);
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bool dal_i2c_engine_setup_i2c_engine(
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struct i2c_engine *engine);
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void dal_i2c_engine_submit_channel_request(
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struct i2c_engine *engine,
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struct i2c_request_transaction_data *request);
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void dal_i2c_engine_process_channel_reply(
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struct i2c_engine *engine,
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struct i2c_reply_transaction_data *reply);
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bool dal_i2c_engine_acquire(
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struct engine *ptr,
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struct ddc *ddc_handle);
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#endif
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