1/*
  2 * Copyright 2012-15 Advanced Micro Devices, Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * Authors: AMD
 23 *
 24 */
 25
 26#include "dm_services.h"
 27
 28/*
 29 * Pre-requisites: headers required by header of this unit
 30 */
 31#include "include/i2caux_interface.h"
 32#include "engine.h"
 33
 34/*
 35 * Header of this unit
 36 */
 37
 38#include "i2c_engine.h"
 39
 40/*
 41 * Post-requisites: headers required by this unit
 42 */
 43
 44/*
 45 * This unit
 46 */
 47
 48#define FROM_ENGINE(ptr) \
 49	container_of((ptr), struct i2c_engine, base)
 50
 51bool dal_i2c_engine_acquire(
 52	struct engine *engine,
 53	struct ddc *ddc_handle)
 54{
 55	struct i2c_engine *i2c_engine = FROM_ENGINE(engine);
 56
 57	uint32_t counter = 0;
 58	bool result;
 59
 60	do {
 61		result = i2c_engine->funcs->acquire_engine(
 62			i2c_engine, ddc_handle);
 63
 64		if (result)
 65			break;
 66
 67		/* i2c_engine is busy by VBios, lets wait and retry */
 68
 69		udelay(10);
 70
 71		++counter;
 72	} while (counter < 2);
 73
 74	if (result) {
 75		if (!i2c_engine->funcs->setup_engine(i2c_engine)) {
 76			engine->funcs->release_engine(engine);
 77			result = false;
 78		}
 79	}
 80
 81	return result;
 82}
 83
 84bool dal_i2c_engine_setup_i2c_engine(
 85	struct i2c_engine *engine)
 86{
 87	/* Derivative classes do not have to override this */
 88
 89	return true;
 90}
 91
 92void dal_i2c_engine_submit_channel_request(
 93	struct i2c_engine *engine,
 94	struct i2c_request_transaction_data *request)
 95{
 96
 97}
 98
 99void dal_i2c_engine_process_channel_reply(
100	struct i2c_engine *engine,
101	struct i2c_reply_transaction_data *reply)
102{
103
104}
105
106void dal_i2c_engine_construct(
107	struct i2c_engine *engine,
108	struct dc_context *ctx)
109{
110	dal_i2caux_construct_engine(&engine->base, ctx);
111	engine->timeout_delay = 0;
112}
113
114void dal_i2c_engine_destruct(
115	struct i2c_engine *engine)
116{
117	dal_i2caux_destruct_engine(&engine->base);
118}