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
|
/*
* STK1160 driver
*
* Copyright (C) 2012 Ezequiel Garcia
* <elezegarcia--a.t--gmail.com>
*
* Copyright (C) 2016 Marcel Hasler
* <mahasler--a.t--gmail.com>
*
* Based on Easycap driver by R.M. Thomas
* Copyright (C) 2010 R.M. Thomas
* <rmthomas--a.t--sciolus.org>
*
* 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.
*
*/
#include "stk1160.h"
#include "stk1160-reg.h"
static void stk1160_write_ac97(struct stk1160 *dev, u16 reg, u16 value)
{
/* Set codec register address */
stk1160_write_reg(dev, STK1160_AC97_ADDR, reg);
/* Set codec command */
stk1160_write_reg(dev, STK1160_AC97_CMD, value & 0xff);
stk1160_write_reg(dev, STK1160_AC97_CMD + 1, (value & 0xff00) >> 8);
/*
* Set command write bit to initiate write operation.
* The bit will be cleared when transfer is done.
*/
stk1160_write_reg(dev, STK1160_AC97CTL_0, 0x8c);
}
#ifdef DEBUG
static u16 stk1160_read_ac97(struct stk1160 *dev, u16 reg)
{
u8 vall = 0;
u8 valh = 0;
/* Set codec register address */
stk1160_write_reg(dev, STK1160_AC97_ADDR, reg);
/*
* Set command read bit to initiate read operation.
* The bit will be cleared when transfer is done.
*/
stk1160_write_reg(dev, STK1160_AC97CTL_0, 0x8b);
/* Retrieve register value */
stk1160_read_reg(dev, STK1160_AC97_CMD, &vall);
stk1160_read_reg(dev, STK1160_AC97_CMD + 1, &valh);
return (valh << 8) | vall;
}
void stk1160_ac97_dump_regs(struct stk1160 *dev)
{
u16 value;
value = stk1160_read_ac97(dev, 0x12); /* CD volume */
stk1160_dbg("0x12 == 0x%04x", value);
value = stk1160_read_ac97(dev, 0x10); /* Line-in volume */
stk1160_dbg("0x10 == 0x%04x", value);
value = stk1160_read_ac97(dev, 0x0e); /* MIC volume (mono) */
stk1160_dbg("0x0e == 0x%04x", value);
value = stk1160_read_ac97(dev, 0x16); /* Aux volume */
stk1160_dbg("0x16 == 0x%04x", value);
value = stk1160_read_ac97(dev, 0x1a); /* Record select */
stk1160_dbg("0x1a == 0x%04x", value);
value = stk1160_read_ac97(dev, 0x02); /* Master volume */
stk1160_dbg("0x02 == 0x%04x", value);
value = stk1160_read_ac97(dev, 0x1c); /* Record gain */
stk1160_dbg("0x1c == 0x%04x", value);
}
#endif
int stk1160_has_audio(struct stk1160 *dev)
{
u8 value;
stk1160_read_reg(dev, STK1160_POSV_L, &value);
return !(value & STK1160_POSV_L_ACDOUT);
}
int stk1160_has_ac97(struct stk1160 *dev)
{
u8 value;
stk1160_read_reg(dev, STK1160_POSV_L, &value);
return !(value & STK1160_POSV_L_ACSYNC);
}
void stk1160_ac97_setup(struct stk1160 *dev)
{
if (!stk1160_has_audio(dev)) {
stk1160_info("Device doesn't support audio, skipping AC97 setup.");
return;
}
if (!stk1160_has_ac97(dev)) {
stk1160_info("Device uses internal 8-bit ADC, skipping AC97 setup.");
return;
}
/* Two-step reset AC97 interface and hardware codec */
stk1160_write_reg(dev, STK1160_AC97CTL_0, 0x94);
stk1160_write_reg(dev, STK1160_AC97CTL_0, 0x8c);
/* Set 16-bit audio data and choose L&R channel*/
stk1160_write_reg(dev, STK1160_AC97CTL_1 + 2, 0x01);
stk1160_write_reg(dev, STK1160_AC97CTL_1 + 3, 0x00);
/* Setup channels */
stk1160_write_ac97(dev, 0x12, 0x8808); /* CD volume */
stk1160_write_ac97(dev, 0x10, 0x0808); /* Line-in volume */
stk1160_write_ac97(dev, 0x0e, 0x0008); /* MIC volume (mono) */
stk1160_write_ac97(dev, 0x16, 0x0808); /* Aux volume */
stk1160_write_ac97(dev, 0x1a, 0x0404); /* Record select */
stk1160_write_ac97(dev, 0x02, 0x0000); /* Master volume */
stk1160_write_ac97(dev, 0x1c, 0x0808); /* Record gain */
#ifdef DEBUG
stk1160_ac97_dump_regs(dev);
#endif
}
|
