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
26 #ifndef __DCE_I2C_SW_H__
27 #define __DCE_I2C_SW_H__
28
29 enum {
30 DCE_I2C_DEFAULT_I2C_SW_SPEED = 50,
31 I2C_SW_RETRIES = 10,
32 I2C_SW_TIMEOUT_DELAY = 3000,
33 };
34
35 struct dce_i2c_sw {
36 struct ddc *ddc;
37 struct dc_context *ctx;
38 uint32_t clock_delay;
39 uint32_t speed;
40 };
41
42 void dce_i2c_sw_construct(
43 struct dce_i2c_sw *dce_i2c_sw,
44 struct dc_context *ctx);
45
46 bool dce_i2c_submit_command_sw(
47 struct resource_pool *pool,
48 struct ddc *ddc,
49 struct i2c_command *cmd,
50 struct dce_i2c_sw *dce_i2c_sw);
51
52 struct dce_i2c_sw *dce_i2c_acquire_i2c_sw_engine(
53 struct resource_pool *pool,
54 struct ddc *ddc);
55
56 #endif
57