1  /*
2   * Copyright 2018 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  #include "dce_i2c.h"
26  #include "reg_helper.h"
27  
dce_i2c_oem_device_present(struct resource_pool * pool,struct ddc_service * ddc,size_t slave_address)28  bool dce_i2c_oem_device_present(
29  	struct resource_pool *pool,
30  	struct ddc_service *ddc,
31  	size_t slave_address
32  )
33  {
34  	struct dc *dc = ddc->ctx->dc;
35  	struct dc_bios *dcb = dc->ctx->dc_bios;
36  	struct graphics_object_id id = {0};
37  	struct graphics_object_i2c_info i2c_info;
38  
39  	if (!dc->ctx->dc_bios->fw_info.oem_i2c_present)
40  		return false;
41  
42  	id.id = dc->ctx->dc_bios->fw_info.oem_i2c_obj_id;
43  	id.enum_id = 0;
44  	id.type = OBJECT_TYPE_GENERIC;
45  	if (dcb->funcs->get_i2c_info(dcb, id, &i2c_info) != BP_RESULT_OK)
46  		return false;
47  
48  	if (i2c_info.i2c_slave_address != slave_address)
49  		return false;
50  
51  	return true;
52  }
53  
dce_i2c_submit_command(struct resource_pool * pool,struct ddc * ddc,struct i2c_command * cmd)54  bool dce_i2c_submit_command(
55  	struct resource_pool *pool,
56  	struct ddc *ddc,
57  	struct i2c_command *cmd)
58  {
59  	struct dce_i2c_hw *dce_i2c_hw;
60  	struct dce_i2c_sw dce_i2c_sw = {0};
61  
62  	if (!ddc) {
63  		BREAK_TO_DEBUGGER();
64  		return false;
65  	}
66  
67  	if (!cmd) {
68  		BREAK_TO_DEBUGGER();
69  		return false;
70  	}
71  
72  	dce_i2c_hw = acquire_i2c_hw_engine(pool, ddc);
73  
74  	if (dce_i2c_hw)
75  		return dce_i2c_submit_command_hw(pool, ddc, cmd, dce_i2c_hw);
76  
77  	dce_i2c_sw.ctx = ddc->ctx;
78  	if (dce_i2c_engine_acquire_sw(&dce_i2c_sw, ddc)) {
79  		return dce_i2c_submit_command_sw(pool, ddc, cmd, &dce_i2c_sw);
80  	}
81  
82  	return false;
83  }
84