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
|
/* best viewed with tabsize 4 */
#include "ak4531.h"
#include "pci_helper.h"
#define MASTER_VOLUME_LCH 0x00
#define MASTER_VOLUME_RCH 0x01
#define FM_VOLUME_LCH 0x04
#define FM_VOLUME_RCH 0x05
#define CD_AUDIO_VOLUME_LCH 0x06
#define CD_AUDIO_VOLUME_RCH 0x07
#define LINE_VOLUME_LCH 0x08
#define LINE_VOLUME_RCH 0x09
#define MIC_VOLUME 0x0e
#define MONO_OUT_VOLUME 0x0f
#define RESET_AND_POWER_DOWN 0x16
#define PD 0x02
#define RST 0x01
#define AD_INPUT_SELECT 0x18
#define MIC_AMP_GAIN 0x19
#define MUTE 0x80
static int ak4531_write(u8_t address, u8_t data);
static int ak4531_finished(void);
static int set_volume(struct volume_level *level, int cmd_left, int
cmd_right, int max_level);
static u16_t base_address;
static u16_t status_register;
static u16_t status_bit;
static u16_t poll_address;
u8_t mixer_values[0x20] = {
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, /* 0x00 - 0x07 */
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x08, /* 0x08 - 0x0f */
0x7e, 0x3d, 0x01, 0x01, 0x00, 0x00, 0x03, 0x00, /* 0x10 - 0x17 */
0x00, 0x01 /* 0x18 - 0x19 */
};
#if 0
u8_t mixer_values[0x20] = {
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, /* 0x00 - 0x07 */
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, /* 0x08 - 0x0f */
0x7f, 0x3d, 0x55, 0x26, 0xf7, 0xef, 0x03, 0x00, /* 0x10 - 0x17 */
0x00, 0x01 /* 0x18 - 0x19 */
};
#endif
static int ak4531_finished(void) {
int i;
u16_t cstat;
for (i = 0; i < 0x40000; i++) {
cstat = pci_inw(status_register);
if (!(cstat & status_bit)) {
return 1;
}
}
return 0;
}
static int ak4531_write (u8_t address, u8_t data) {
u16_t to_be_written;
if (address > MIC_AMP_GAIN) return -1;
to_be_written = (u16_t)((address << 8) | data);
if (!ak4531_finished()) return -1;
pci_outw(base_address, to_be_written);
return 0;
}
int ak4531_init(u16_t base, u16_t status_reg, u16_t bit,
u16_t poll) {
int i;
base_address = base;
status_register = status_reg;
status_bit = bit;
poll_address = poll;
for (i=0; i<100; i++) {
pci_inb(poll_address);
}
if(ak4531_write(RESET_AND_POWER_DOWN, PD|RST) < 0) return -1;
for (i=0; i<100; i++) {
pci_inb(poll_address);
}
ak4531_write(AD_INPUT_SELECT, 0x00);
for (i = MASTER_VOLUME_LCH ; i <= MIC_AMP_GAIN; i++) {
if (ak4531_write(i, mixer_values[i]) < 0) return -1;
}
return 0;
}
int ak4531_get_set_volume(struct volume_level *level, int flag) {
int cmd_left, cmd_right, max_level;
max_level = 0x1f;
switch(level->device) {
case Master:
cmd_left = MASTER_VOLUME_LCH;
cmd_right = MASTER_VOLUME_RCH;
break;
case Dac:
return EINVAL;
break;
case Fm:
cmd_left = FM_VOLUME_LCH;
cmd_right = FM_VOLUME_RCH;
break;
case Cd:
cmd_left = CD_AUDIO_VOLUME_LCH;
cmd_right = CD_AUDIO_VOLUME_RCH;
break;
case Line:
cmd_left = LINE_VOLUME_LCH;
cmd_right = LINE_VOLUME_RCH;
break;
case Mic:
cmd_left = cmd_right = MIC_VOLUME;
break;
case Speaker:
cmd_left = cmd_right = MONO_OUT_VOLUME;
max_level = 0x03;
break;
case Treble:
return EINVAL;
break;
case Bass:
return EINVAL;
break;
default:
return EINVAL;
}
if (flag) { /* set volume */
return set_volume(level, cmd_left, cmd_right, max_level);
}
else { /* get volume */
level->left = - ((int) (mixer_values[cmd_left] & ~MUTE)) + 0x1f;
level->right = - ((int) (mixer_values[cmd_right] & ~MUTE)) + 0x1f;
return OK;
}
}
static int set_volume(struct volume_level *level, int cmd_left, int cmd_right,
int max_level) {
if(level->right < 0) level->right = 0;
else if(level->right > max_level) level->right = max_level;
if(level->left < 0) level->left = 0;
else if(level->left > max_level) level->left = max_level;
mixer_values[cmd_left] = (-level->left)+0x1f;
ak4531_write(cmd_left, mixer_values[cmd_left]);
mixer_values[cmd_right] = (-level->right)+0x1f;
ak4531_write(cmd_right, mixer_values[cmd_right]);
return OK;
}
|
