1 | /* |
2 | * Copyright 2015 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 | */ |
23 | |
24 | #include <linux/mm.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/device.h> |
27 | #include <linux/delay.h> |
28 | #include <linux/errno.h> |
29 | |
30 | #include "acp_gfx_if.h" |
31 | |
32 | #define ACP_MODE_I2S 0 |
33 | #define ACP_MODE_AZ 1 |
34 | |
35 | #define mmACP_AZALIA_I2S_SELECT 0x51d4 |
36 | |
37 | int amd_acp_hw_init(struct cgs_device *cgs_device, |
38 | unsigned acp_version_major, unsigned acp_version_minor) |
39 | { |
40 | unsigned int acp_mode = ACP_MODE_I2S; |
41 | |
42 | if ((acp_version_major == 2) && (acp_version_minor == 2)) |
43 | acp_mode = cgs_read_register(cgs_device, |
44 | mmACP_AZALIA_I2S_SELECT); |
45 | |
46 | if (acp_mode != ACP_MODE_I2S) |
47 | return -ENODEV; |
48 | |
49 | return 0; |
50 | } |
51 | |