1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2015 Advanced Micro Devices, Inc.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a
5*4882a593Smuzhiyun * copy of this software and associated documentation files (the "Software"),
6*4882a593Smuzhiyun * to deal in the Software without restriction, including without limitation
7*4882a593Smuzhiyun * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8*4882a593Smuzhiyun * and/or sell copies of the Software, and to permit persons to whom the
9*4882a593Smuzhiyun * Software is furnished to do so, subject to the following conditions:
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * The above copyright notice and this permission notice shall be included in
12*4882a593Smuzhiyun * all copies or substantial portions of the Software.
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17*4882a593Smuzhiyun * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18*4882a593Smuzhiyun * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19*4882a593Smuzhiyun * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20*4882a593Smuzhiyun * OTHER DEALINGS IN THE SOFTWARE.
21*4882a593Smuzhiyun *
22*4882a593Smuzhiyun */
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #include <linux/mm.h>
25*4882a593Smuzhiyun #include <linux/slab.h>
26*4882a593Smuzhiyun #include <linux/device.h>
27*4882a593Smuzhiyun #include <linux/delay.h>
28*4882a593Smuzhiyun #include <linux/errno.h>
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun #include "acp_gfx_if.h"
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun #define ACP_MODE_I2S 0
33*4882a593Smuzhiyun #define ACP_MODE_AZ 1
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun #define mmACP_AZALIA_I2S_SELECT 0x51d4
36*4882a593Smuzhiyun
amd_acp_hw_init(struct cgs_device * cgs_device,unsigned acp_version_major,unsigned acp_version_minor)37*4882a593Smuzhiyun int amd_acp_hw_init(struct cgs_device *cgs_device,
38*4882a593Smuzhiyun unsigned acp_version_major, unsigned acp_version_minor)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun unsigned int acp_mode = ACP_MODE_I2S;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun if ((acp_version_major == 2) && (acp_version_minor == 2))
43*4882a593Smuzhiyun acp_mode = cgs_read_register(cgs_device,
44*4882a593Smuzhiyun mmACP_AZALIA_I2S_SELECT);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun if (acp_mode != ACP_MODE_I2S)
47*4882a593Smuzhiyun return -ENODEV;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun return 0;
50*4882a593Smuzhiyun }
51