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
195
196
197
198
199
200
201
202
203
204
205
206
207
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012 Samsung Electronics
* R. Chandrasekar <rcsekar@samsung.com>
*/
#include <malloc.h>
#include <common.h>
#include <asm/io.h>
#include <linux/libfdt.h>
#include <fdtdec.h>
#include <i2c.h>
#include <i2s.h>
#include <sound.h>
#include <asm/arch/sound.h>
#include "wm8994.h"
#include "max98095.h"
/* defines */
#define SOUND_400_HZ 400
#define SOUND_BITS_IN_BYTE 8
static struct i2stx_info g_i2stx_pri;
/*
* get_sound_i2s_values gets values for i2s parameters
*
* @param i2stx_info i2s transmitter transfer param structure
* @param blob FDT blob if enabled else NULL
*/
static int get_sound_i2s_values(struct i2stx_info *i2s, const void *blob)
{
int node;
int error = 0;
int base;
node = fdt_path_offset(blob, "i2s");
if (node <= 0) {
debug("EXYNOS_SOUND: No node for sound in device tree\n");
return -1;
}
/*
* Get the pre-defined sound specific values from FDT.
* All of these are expected to be correct otherwise
* wrong register values in i2s setup parameters
* may result in no sound play.
*/
base = fdtdec_get_addr(blob, node, "reg");
if (base == FDT_ADDR_T_NONE) {
debug("%s: Missing i2s base\n", __func__);
return -1;
}
i2s->base_address = base;
i2s->audio_pll_clk = fdtdec_get_int(blob,
node, "samsung,i2s-epll-clock-frequency", -1);
error |= i2s->audio_pll_clk;
debug("audio_pll_clk = %d\n", i2s->audio_pll_clk);
i2s->samplingrate = fdtdec_get_int(blob,
node, "samsung,i2s-sampling-rate", -1);
error |= i2s->samplingrate;
debug("samplingrate = %d\n", i2s->samplingrate);
i2s->bitspersample = fdtdec_get_int(blob,
node, "samsung,i2s-bits-per-sample", -1);
error |= i2s->bitspersample;
debug("bitspersample = %d\n", i2s->bitspersample);
i2s->channels = fdtdec_get_int(blob,
node, "samsung,i2s-channels", -1);
error |= i2s->channels;
debug("channels = %d\n", i2s->channels);
i2s->rfs = fdtdec_get_int(blob,
node, "samsung,i2s-lr-clk-framesize", -1);
error |= i2s->rfs;
debug("rfs = %d\n", i2s->rfs);
i2s->bfs = fdtdec_get_int(blob,
node, "samsung,i2s-bit-clk-framesize", -1);
error |= i2s->bfs;
debug("bfs = %d\n", i2s->bfs);
i2s->id = fdtdec_get_int(blob, node, "samsung,i2s-id", -1);
error |= i2s->id;
debug("id = %d\n", i2s->id);
if (error == -1) {
debug("fail to get sound i2s node properties\n");
return -1;
}
return 0;
}
/*
* Init codec
*
* @param blob FDT blob
* @param pi2s_tx i2s parameters required by codec
* @return int value, 0 for success
*/
static int codec_init(const void *blob, struct i2stx_info *pi2s_tx)
{
int ret;
const char *codectype;
int node;
/* Get the node from FDT for sound */
node = fdt_path_offset(blob, "i2s");
if (node <= 0) {
debug("EXYNOS_SOUND: No node for sound in device tree\n");
debug("node = %d\n", node);
return -1;
}
/*
* Get the pre-defined sound codec specific values from FDT.
* All of these are expected to be correct otherwise sound
* can not be played
*/
codectype = fdt_getprop(blob, node, "samsung,codec-type", NULL);
debug("device = %s\n", codectype);
if (!strcmp(codectype, "wm8994")) {
/* Check the codec type and initialise the same */
ret = wm8994_init(blob, pi2s_tx->id + 1,
pi2s_tx->samplingrate,
(pi2s_tx->samplingrate * (pi2s_tx->rfs)),
pi2s_tx->bitspersample, pi2s_tx->channels);
} else if (!strcmp(codectype, "max98095")) {
ret = max98095_init(blob, pi2s_tx->id + 1,
pi2s_tx->samplingrate,
(pi2s_tx->samplingrate * (pi2s_tx->rfs)),
pi2s_tx->bitspersample);
} else {
debug("%s: Unknown codec type %s\n", __func__, codectype);
return -1;
}
if (ret) {
debug("%s: Codec init failed\n", __func__);
return -1;
}
return 0;
}
int sound_init(const void *blob)
{
int ret;
struct i2stx_info *pi2s_tx = &g_i2stx_pri;
/* Get the I2S Values */
if (get_sound_i2s_values(pi2s_tx, blob) < 0) {
debug(" FDT I2S values failed\n");
return -1;
}
if (codec_init(blob, pi2s_tx) < 0) {
debug(" Codec init failed\n");
return -1;
}
ret = i2s_tx_init(pi2s_tx);
if (ret) {
debug("%s: Failed to init i2c transmit: ret=%d\n", __func__,
ret);
return ret;
}
return ret;
}
int sound_play(uint32_t msec, uint32_t frequency)
{
unsigned int *data;
unsigned long data_size;
unsigned int ret = 0;
/*Buffer length computation */
data_size = g_i2stx_pri.samplingrate * g_i2stx_pri.channels;
data_size *= (g_i2stx_pri.bitspersample / SOUND_BITS_IN_BYTE);
data = malloc(data_size);
if (data == NULL) {
debug("%s: malloc failed\n", __func__);
return -1;
}
sound_create_square_wave((unsigned short *)data,
data_size / sizeof(unsigned short),
frequency);
while (msec >= 1000) {
ret = i2s_transfer_tx_data(&g_i2stx_pri, data,
(data_size / sizeof(int)));
msec -= 1000;
}
if (msec) {
unsigned long size =
(data_size * msec) / (sizeof(int) * 1000);
ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size);
}
free(data);
return ret;
}
|
