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
|
/*
* rt56xx_ioctl.h -- RT56XX ALSA SoC audio driver IO control
*
* Copyright (c) 2011-2013 REALTEK SEMICONDUCTOR CORP. All rights reserved.
* Author: Bard Liao <bardliao@realtek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/spi/spi.h>
#include <sound/soc.h>
#include "rt56xx_ioctl.h"
static struct rt56xx_ops rt56xx_ioctl_ops;
#if defined(CONFIG_SND_HWDEP) || defined(CONFIG_SND_HWDEP_MODULE)
#define RT_CE_CODEC_HWDEP_NAME "rt56xx hwdep "
static int rt56xx_hwdep_open(struct snd_hwdep *hw, struct file *file)
{
struct snd_soc_codec *codec = hw->private_data;
dev_dbg(codec->dev, "%s()\n", __func__);
return 0;
}
static int rt56xx_hwdep_release(struct snd_hwdep *hw, struct file *file)
{
struct snd_soc_codec *codec = hw->private_data;
dev_dbg(codec->dev, "%s()\n", __func__);
return 0;
}
static int rt56xx_hwdep_ioctl_common(struct snd_hwdep *hw,
struct file *file, unsigned int cmd, unsigned long arg)
{
struct snd_soc_codec *codec = hw->private_data;
struct rt56xx_cmd __user *_rt56xx = (struct rt56xx_cmd *)arg;
struct rt56xx_cmd rt56xx;
int *buf, *p;
if (copy_from_user(&rt56xx, _rt56xx, sizeof(rt56xx))) {
dev_err(codec->dev, "copy_from_user faild\n");
return -EFAULT;
}
dev_dbg(codec->dev, "%s(): rt56xx.number=%d, cmd=%d\n",
__func__, rt56xx.number, cmd);
buf = kmalloc(sizeof(*buf) * rt56xx.number, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
if (copy_from_user(buf, rt56xx.buf, sizeof(*buf) * rt56xx.number))
goto err;
switch (cmd) {
case RT_READ_CODEC_REG_IOCTL:
for (p = buf; p < buf + rt56xx.number / 2; p++)
*(p + rt56xx.number / 2) = snd_soc_read(codec, *p);
if (copy_to_user(rt56xx.buf, buf, sizeof(*buf) * rt56xx.number))
goto err;
break;
case RT_WRITE_CODEC_REG_IOCTL:
for (p = buf; p < buf + rt56xx.number / 2; p++)
snd_soc_write(codec, *p, *(p + rt56xx.number / 2));
break;
case RT_READ_CODEC_INDEX_IOCTL:
if (NULL == rt56xx_ioctl_ops.index_read)
goto err;
for (p = buf; p < buf + rt56xx.number / 2; p++)
*(p+rt56xx.number/2) = rt56xx_ioctl_ops.index_read(
codec, *p);
if (copy_to_user(rt56xx.buf, buf,
sizeof(*buf) * rt56xx.number))
goto err;
break;
case RT_WRITE_CODEC_INDEX_IOCTL:
if (NULL == rt56xx_ioctl_ops.index_write)
goto err;
for (p = buf; p < buf + rt56xx.number / 2; p++)
rt56xx_ioctl_ops.index_write(codec, *p,
*(p+rt56xx.number/2));
break;
default:
if (NULL == rt56xx_ioctl_ops.ioctl_common)
goto err;
rt56xx_ioctl_ops.ioctl_common(hw, file, cmd, arg);
break;
}
kfree(buf);
return 0;
err:
kfree(buf);
return -EFAULT;
}
static int rt56xx_codec_dump_reg(struct snd_hwdep *hw,
struct file *file, unsigned long arg)
{
struct snd_soc_codec *codec = hw->private_data;
struct rt56xx_cmd __user *_rt56xx = (struct rt56xx_cmd *)arg;
struct rt56xx_cmd rt56xx;
int i, *buf, number = codec->driver->reg_cache_size;
dev_dbg(codec->dev, "enter %s, number = %d\n", __func__, number);
if (copy_from_user(&rt56xx, _rt56xx, sizeof(rt56xx)))
return -EFAULT;
buf = kmalloc(sizeof(*buf) * number, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
for (i = 0; i < number/2; i++) {
buf[i] = i << 1;
buf[i + number / 2] = codec->read(codec, buf[i]);
}
if (copy_to_user(rt56xx.buf, buf, sizeof(*buf) * i))
goto err;
rt56xx.number = number;
if (copy_to_user(_rt56xx, &rt56xx, sizeof(rt56xx)))
goto err;
kfree(buf);
return 0;
err:
kfree(buf);
return -EFAULT;
}
static int rt56xx_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case RT_READ_ALL_CODEC_REG_IOCTL:
return rt56xx_codec_dump_reg(hw, file, arg);
default:
return rt56xx_hwdep_ioctl_common(hw, file, cmd, arg);
}
return 0;
}
int realtek_ce_init_hwdep(struct snd_soc_codec *codec)
{
struct snd_hwdep *hw;
struct snd_card *card = codec->card->snd_card;
int err;
dev_dbg(codec->dev, "enter %s\n", __func__);
err = snd_hwdep_new(card, RT_CE_CODEC_HWDEP_NAME, 0, &hw);
if (err < 0)
return err;
strcpy(hw->name, RT_CE_CODEC_HWDEP_NAME);
hw->private_data = codec;
hw->ops.open = rt56xx_hwdep_open;
hw->ops.release = rt56xx_hwdep_release;
hw->ops.ioctl = rt56xx_hwdep_ioctl;
return 0;
}
EXPORT_SYMBOL_GPL(realtek_ce_init_hwdep);
#endif
struct rt56xx_ops *rt56xx_get_ioctl_ops(void)
{
return &rt56xx_ioctl_ops;
}
EXPORT_SYMBOL_GPL(rt56xx_get_ioctl_ops);
|
