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
194
|
/*
* ALSA driver for ICEnsemble ICE1712 (Envy24)
*
* AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface
*
* Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <sound/core.h>
#include <sound/initval.h>
#include "ice1712.h"
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
MODULE_LICENSE("GPL");
static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip)
{
struct snd_ice1712 *ice = ak->private_data[0];
snd_ice1712_save_gpio_status(ice);
}
static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip)
{
struct snd_ice1712 *ice = ak->private_data[0];
snd_ice1712_restore_gpio_status(ice);
}
/*
* write AK4xxx register
*/
static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip,
unsigned char addr, unsigned char data)
{
unsigned int tmp;
int idx;
unsigned int addrdata;
struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
struct snd_ice1712 *ice = ak->private_data[0];
if (snd_BUG_ON(chip < 0 || chip >= 4))
return;
tmp = snd_ice1712_gpio_read(ice);
tmp |= priv->add_flags;
tmp &= ~priv->mask_flags;
if (priv->cs_mask == priv->cs_addr) {
if (priv->cif) {
tmp |= priv->cs_mask; /* start without chip select */
} else {
tmp &= ~priv->cs_mask; /* chip select low */
snd_ice1712_gpio_write(ice, tmp);
udelay(1);
}
} else {
/* doesn't handle cf=1 yet */
tmp &= ~priv->cs_mask;
tmp |= priv->cs_addr;
snd_ice1712_gpio_write(ice, tmp);
udelay(1);
}
/* build I2C address + data byte */
addrdata = (priv->caddr << 6) | 0x20 | (addr & 0x1f);
addrdata = (addrdata << 8) | data;
for (idx = 15; idx >= 0; idx--) {
/* drop clock */
tmp &= ~priv->clk_mask;
snd_ice1712_gpio_write(ice, tmp);
udelay(1);
/* set data */
if (addrdata & (1 << idx))
tmp |= priv->data_mask;
else
tmp &= ~priv->data_mask;
snd_ice1712_gpio_write(ice, tmp);
udelay(1);
/* raise clock */
tmp |= priv->clk_mask;
snd_ice1712_gpio_write(ice, tmp);
udelay(1);
}
if (priv->cs_mask == priv->cs_addr) {
if (priv->cif) {
/* assert a cs pulse to trigger */
tmp &= ~priv->cs_mask;
snd_ice1712_gpio_write(ice, tmp);
udelay(1);
}
tmp |= priv->cs_mask; /* chip select high to trigger */
} else {
tmp &= ~priv->cs_mask;
tmp |= priv->cs_none; /* deselect address */
}
snd_ice1712_gpio_write(ice, tmp);
udelay(1);
}
/*
* initialize the struct snd_akm4xxx record with the template
*/
int snd_ice1712_akm4xxx_init(struct snd_akm4xxx *ak, const struct snd_akm4xxx *temp,
const struct snd_ak4xxx_private *_priv, struct snd_ice1712 *ice)
{
struct snd_ak4xxx_private *priv;
if (_priv != NULL) {
priv = kmalloc(sizeof(*priv), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;
*priv = *_priv;
} else {
priv = NULL;
}
*ak = *temp;
ak->card = ice->card;
ak->private_value[0] = (unsigned long)priv;
ak->private_data[0] = ice;
if (ak->ops.lock == NULL)
ak->ops.lock = snd_ice1712_akm4xxx_lock;
if (ak->ops.unlock == NULL)
ak->ops.unlock = snd_ice1712_akm4xxx_unlock;
if (ak->ops.write == NULL)
ak->ops.write = snd_ice1712_akm4xxx_write;
snd_akm4xxx_init(ak);
return 0;
}
void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice)
{
unsigned int akidx;
if (ice->akm == NULL)
return;
for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
struct snd_akm4xxx *ak = &ice->akm[akidx];
kfree((void*)ak->private_value[0]);
}
kfree(ice->akm);
}
/*
* build AK4xxx controls
*/
int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice)
{
unsigned int akidx;
int err;
for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
struct snd_akm4xxx *ak = &ice->akm[akidx];
err = snd_akm4xxx_build_controls(ak);
if (err < 0)
return err;
}
return 0;
}
static int __init alsa_ice1712_akm4xxx_module_init(void)
{
return 0;
}
static void __exit alsa_ice1712_akm4xxx_module_exit(void)
{
}
module_init(alsa_ice1712_akm4xxx_module_init)
module_exit(alsa_ice1712_akm4xxx_module_exit)
EXPORT_SYMBOL(snd_ice1712_akm4xxx_init);
EXPORT_SYMBOL(snd_ice1712_akm4xxx_free);
EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls);
|
