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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/*
* imx-3stack-ak5702.c -- SoC audio for imx_3stack
*
* Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <mach/hardware.h>
#include <mach/clock.h>
#include "imx-pcm.h"
#include "imx-esai.h"
#include "../codecs/ak5702.h"
struct imx_3stack_pcm_state {
int lr_clk_active;
};
static struct imx_3stack_pcm_state clk_state;
static int imx_3stack_startup(struct snd_pcm_substream *substream)
{
clk_state.lr_clk_active++;
return 0;
}
static void imx_3stack_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai_link *pcm_link = rtd->dai;
struct snd_soc_dai *codec_dai = pcm_link->codec_dai;
/* disable the PLL if there are no active Rx channels */
if (!codec_dai->active)
snd_soc_dai_set_pll(codec_dai, 0, 0, 0);
clk_state.lr_clk_active--;
}
static int imx_3stack_surround_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai_link *pcm_link = rtd->dai;
struct snd_soc_dai *cpu_dai = pcm_link->cpu_dai;
struct snd_soc_dai *codec_dai = pcm_link->codec_dai;
unsigned int rate = params_rate(params);
struct imx_esai *esai_mode = (struct imx_esai *)cpu_dai->private_data;
u32 dai_format;
if (clk_state.lr_clk_active > 1)
return 0;
dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM;
esai_mode->sync_mode = 0;
esai_mode->network_mode = 1;
/* set codec DAI configuration */
snd_soc_dai_set_fmt(codec_dai, dai_format);
/* set cpu DAI configuration */
snd_soc_dai_set_fmt(cpu_dai, dai_format);
/* set i.MX active slot mask */
snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffff, 2);
/* set the ESAI system clock as input */
snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_IN);
/* set codec BCLK division */
snd_soc_dai_set_clkdiv(codec_dai, AK5702_BCLK_CLKDIV,
AK5702_BCLK_DIV_32);
snd_soc_dai_set_sysclk(codec_dai, 0, rate, SND_SOC_CLOCK_OUT);
snd_soc_dai_set_pll(codec_dai, 1, 12000000, 0);
return 0;
}
/*
* imx_3stack ak5702 DAI opserations.
*/
static struct snd_soc_ops imx_3stack_surround_ops = {
.startup = imx_3stack_startup,
.shutdown = imx_3stack_shutdown,
.hw_params = imx_3stack_surround_hw_params,
};
/* imx_3stack card dapm widgets */
static const struct snd_soc_dapm_widget imx_3stack_dapm_widgets[] = {
SND_SOC_DAPM_LINE("Line In Jack", NULL),
};
/* example card audio map */
static const struct snd_soc_dapm_route audio_map[] = {
/* Line in jack */
{"ADCA Left Input", NULL, "Line In Jack"},
{"ADCA Right Input", NULL, "Line In Jack"},
{"ADCB Left Input", NULL, "Line In Jack"},
{"ADCB Right Input", NULL, "Line In Jack"},
};
static int imx_3stack_ak5702_init(struct snd_soc_codec *codec)
{
snd_soc_dapm_new_controls(codec, imx_3stack_dapm_widgets,
ARRAY_SIZE(imx_3stack_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
snd_soc_dapm_sync(codec);
return 0;
}
static struct snd_soc_dai_link imx_3stack_dai = {
.name = "ak5702",
.stream_name = "ak5702",
.codec_dai = &ak5702_dai,
.init = imx_3stack_ak5702_init,
.ops = &imx_3stack_surround_ops,
};
static int imx_3stack_card_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
kfree(socdev->codec_data);
return 0;
}
static struct snd_soc_card snd_soc_card_imx_3stack = {
.name = "imx-3stack",
.platform = &imx_soc_platform,
.dai_link = &imx_3stack_dai,
.num_links = 1,
.remove = imx_3stack_card_remove,
};
static struct snd_soc_device imx_3stack_snd_devdata = {
.card = &snd_soc_card_imx_3stack,
.codec_dev = &soc_codec_dev_ak5702,
};
static int __devinit imx_3stack_ak5702_probe(struct platform_device *pdev)
{
struct ak5702_setup_data *setup;
imx_3stack_dai.cpu_dai = &imx_esai_dai[2];
setup = kzalloc(sizeof(struct ak5702_setup_data), GFP_KERNEL);
setup->i2c_bus = 1;
setup->i2c_address = 0x13;
imx_3stack_snd_devdata.codec_data = setup;
gpio_activate_esai_ports();
return 0;
}
static int imx_3stack_ak5702_remove(struct platform_device *pdev)
{
gpio_deactivate_esai_ports();
return 0;
}
static struct platform_driver imx_3stack_ak5702_driver = {
.probe = imx_3stack_ak5702_probe,
.remove = imx_3stack_ak5702_remove,
.driver = {
.name = "imx-3stack-ak5702",
},
};
static struct platform_device *imx_3stack_snd_device;
static int __init imx_3stack_asoc_init(void)
{
int ret;
ret = platform_driver_register(&imx_3stack_ak5702_driver);
if (ret)
return -ENOMEM;
imx_3stack_snd_device = platform_device_alloc("soc-audio", -1);
if (!imx_3stack_snd_device)
return -ENOMEM;
platform_set_drvdata(imx_3stack_snd_device, &imx_3stack_snd_devdata);
imx_3stack_snd_devdata.dev = &imx_3stack_snd_device->dev;
ret = platform_device_add(imx_3stack_snd_device);
if (ret)
platform_device_put(imx_3stack_snd_device);
return ret;
}
static void __exit imx_3stack_asoc_exit(void)
{
platform_driver_unregister(&imx_3stack_ak5702_driver);
platform_device_unregister(imx_3stack_snd_device);
}
module_init(imx_3stack_asoc_init);
module_exit(imx_3stack_asoc_exit);
/* Module information */
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("ALSA SoC ak5702 imx_3stack");
MODULE_LICENSE("GPL");
|
