1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2022 Advanced Micro Devices, Inc. All rights reserved.
//
// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
/*
* Generic PCI interface for ACP device
*/
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include "amd.h"
#include "../mach-config.h"
#define DRV_NAME "acp_pci"
#define ACP3x_REG_START 0x1240000
#define ACP3x_REG_END 0x125C000
static struct platform_device *dmic_dev;
static struct platform_device *pdev;
static const struct resource acp_res[] = {
{
.start = 0,
.end = ACP3x_REG_END - ACP3x_REG_START,
.name = "acp_mem",
.flags = IORESOURCE_MEM,
},
{
.start = 0,
.end = 0,
.name = "acp_dai_irq",
.flags = IORESOURCE_IRQ,
},
};
static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
{
struct platform_device_info pdevinfo;
struct device *dev = &pci->dev;
const struct resource *res_acp;
struct acp_chip_info *chip;
struct resource *res;
unsigned int flag, addr, num_res, i;
int ret;
flag = snd_amd_acp_find_config(pci);
if (flag != FLAG_AMD_LEGACY)
return -ENODEV;
chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
if (pci_enable_device(pci)) {
dev_err(&pci->dev, "pci_enable_device failed\n");
return -ENODEV;
}
ret = pci_request_regions(pci, "AMD ACP3x audio");
if (ret < 0) {
dev_err(&pci->dev, "pci_request_regions failed\n");
ret = -ENOMEM;
goto disable_pci;
}
pci_set_master(pci);
res_acp = acp_res;
num_res = ARRAY_SIZE(acp_res);
switch (pci->revision) {
case 0x01:
chip->name = "acp_asoc_renoir";
chip->acp_rev = ACP3X_DEV;
break;
case 0x6f:
chip->name = "acp_asoc_rembrandt";
chip->acp_rev = ACP6X_DEV;
break;
default:
dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
ret = -EINVAL;
goto release_regions;
}
dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
if (IS_ERR(dmic_dev)) {
dev_err(dev, "failed to create DMIC device\n");
ret = PTR_ERR(dmic_dev);
goto release_regions;
}
addr = pci_resource_start(pci, 0);
chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
if (!chip->base) {
ret = -ENOMEM;
goto release_regions;
}
res = devm_kzalloc(&pci->dev, sizeof(struct resource) * num_res, GFP_KERNEL);
if (!res) {
platform_device_unregister(dmic_dev);
ret = -ENOMEM;
goto release_regions;
}
for (i = 0; i < num_res; i++, res_acp++) {
res[i].name = res_acp->name;
res[i].flags = res_acp->flags;
res[i].start = addr + res_acp->start;
res[i].end = addr + res_acp->end;
if (res_acp->flags == IORESOURCE_IRQ) {
res[i].start = pci->irq;
res[i].end = res[i].start;
}
}
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.name = chip->name;
pdevinfo.id = 0;
pdevinfo.parent = &pci->dev;
pdevinfo.num_res = num_res;
pdevinfo.res = &res[0];
pdevinfo.data = chip;
pdevinfo.size_data = sizeof(*chip);
pdev = platform_device_register_full(&pdevinfo);
if (IS_ERR(pdev)) {
dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
platform_device_unregister(dmic_dev);
ret = PTR_ERR(pdev);
goto release_regions;
}
return ret;
release_regions:
pci_release_regions(pci);
disable_pci:
pci_disable_device(pci);
return ret;
};
static void acp_pci_remove(struct pci_dev *pci)
{
if (dmic_dev)
platform_device_unregister(dmic_dev);
if (pdev)
platform_device_unregister(pdev);
}
/* PCI IDs */
static const struct pci_device_id acp_pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)},
{ 0, }
};
MODULE_DEVICE_TABLE(pci, acp_pci_ids);
/* pci_driver definition */
static struct pci_driver snd_amd_acp_pci_driver = {
.name = KBUILD_MODNAME,
.id_table = acp_pci_ids,
.probe = acp_pci_probe,
.remove = acp_pci_remove,
};
module_pci_driver(snd_amd_acp_pci_driver);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS(DRV_NAME);
|
