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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
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
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 }
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