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
183
184
185
186
187
188
189
190
191
192
193
|
/*
* hdac-ext-bus.c - HD-audio extended core bus functions.
*
* Copyright (C) 2014-2015 Intel Corp
* Author: Jeeja KP <jeeja.kp@intel.com>
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <sound/hdaudio_ext.h>
MODULE_DESCRIPTION("HDA extended core");
MODULE_LICENSE("GPL v2");
static void hdac_ext_writel(u32 value, u32 __iomem *addr)
{
writel(value, addr);
}
static u32 hdac_ext_readl(u32 __iomem *addr)
{
return readl(addr);
}
static void hdac_ext_writew(u16 value, u16 __iomem *addr)
{
writew(value, addr);
}
static u16 hdac_ext_readw(u16 __iomem *addr)
{
return readw(addr);
}
static void hdac_ext_writeb(u8 value, u8 __iomem *addr)
{
writeb(value, addr);
}
static u8 hdac_ext_readb(u8 __iomem *addr)
{
return readb(addr);
}
static int hdac_ext_dma_alloc_pages(struct hdac_bus *bus, int type,
size_t size, struct snd_dma_buffer *buf)
{
return snd_dma_alloc_pages(type, bus->dev, size, buf);
}
static void hdac_ext_dma_free_pages(struct hdac_bus *bus, struct snd_dma_buffer *buf)
{
snd_dma_free_pages(buf);
}
static const struct hdac_io_ops hdac_ext_default_io = {
.reg_writel = hdac_ext_writel,
.reg_readl = hdac_ext_readl,
.reg_writew = hdac_ext_writew,
.reg_readw = hdac_ext_readw,
.reg_writeb = hdac_ext_writeb,
.reg_readb = hdac_ext_readb,
.dma_alloc_pages = hdac_ext_dma_alloc_pages,
.dma_free_pages = hdac_ext_dma_free_pages,
};
/**
* snd_hdac_ext_bus_init - initialize a HD-audio extended bus
* @ebus: the pointer to extended bus object
* @dev: device pointer
* @ops: bus verb operators
* @io_ops: lowlevel I/O operators, can be NULL. If NULL core will use
* default ops
*
* Returns 0 if successful, or a negative error code.
*/
int snd_hdac_ext_bus_init(struct hdac_ext_bus *ebus, struct device *dev,
const struct hdac_bus_ops *ops,
const struct hdac_io_ops *io_ops)
{
int ret;
static int idx;
/* check if io ops are provided, if not load the defaults */
if (io_ops == NULL)
io_ops = &hdac_ext_default_io;
ret = snd_hdac_bus_init(&ebus->bus, dev, ops, io_ops);
if (ret < 0)
return ret;
INIT_LIST_HEAD(&ebus->hlink_list);
ebus->idx = idx++;
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init);
/**
* snd_hdac_ext_bus_exit - clean up a HD-audio extended bus
* @ebus: the pointer to extended bus object
*/
void snd_hdac_ext_bus_exit(struct hdac_ext_bus *ebus)
{
snd_hdac_bus_exit(&ebus->bus);
WARN_ON(!list_empty(&ebus->hlink_list));
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit);
static void default_release(struct device *dev)
{
snd_hdac_ext_bus_device_exit(container_of(dev, struct hdac_device, dev));
}
/**
* snd_hdac_ext_device_init - initialize the HDA extended codec base device
* @ebus: hdac extended bus to attach to
* @addr: codec address
*
* Returns zero for success or a negative error code.
*/
int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr)
{
struct hdac_device *hdev = NULL;
struct hdac_bus *bus = ebus_to_hbus(ebus);
char name[15];
int ret;
hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
if (!hdev)
return -ENOMEM;
snprintf(name, sizeof(name), "ehdaudio%dD%d", ebus->idx, addr);
ret = snd_hdac_device_init(hdev, bus, name, addr);
if (ret < 0) {
dev_err(bus->dev, "device init failed for hdac device\n");
return ret;
}
hdev->type = HDA_DEV_ASOC;
hdev->dev.release = default_release;
ret = snd_hdac_device_register(hdev);
if (ret) {
dev_err(bus->dev, "failed to register hdac device\n");
snd_hdac_ext_bus_device_exit(hdev);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
/**
* snd_hdac_ext_bus_device_exit - clean up a HD-audio extended codec base device
* @hdev: hdac device to clean up
*/
void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
{
snd_hdac_device_exit(hdev);
kfree(hdev);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);
/**
* snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
*
* @ebus: HD-audio extended bus
*/
void snd_hdac_ext_bus_device_remove(struct hdac_ext_bus *ebus)
{
struct hdac_device *codec, *__codec;
/*
* we need to remove all the codec devices objects created in the
* snd_hdac_ext_bus_device_init
*/
list_for_each_entry_safe(codec, __codec, &ebus->bus.codec_list, list) {
snd_hdac_device_unregister(codec);
put_device(&codec->dev);
}
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove);
|
