[backfire] iwinfo: merge r29417
[openwrt-10.03/.git] / target / linux / xburst / files / sound / soc / jz4740 / n526.c
1 /*
2  * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  *  You should have received a copy of the  GNU General Public License along
9  *  with this program; if not, write  to the Free Software Foundation, Inc.,
10  *  675 Mass Ave, Cambridge, MA 02139, USA.
11  *
12  */
13
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/timer.h>
17 #include <linux/interrupt.h>
18 #include <linux/platform_device.h>
19 #include <sound/core.h>
20 #include <sound/pcm.h>
21 #include <sound/soc.h>
22 #include <sound/soc-dapm.h>
23 #include <linux/gpio.h>
24
25 #include "../codecs/jzcodec.h"
26 #include "jz4740-pcm.h"
27 #include "jz4740-i2s.h"
28
29 #define N526_AMP_EN_GPIO JZ_GPIO_PORTD(4)
30
31 static int n526_spk_event(struct snd_soc_dapm_widget *widget,
32                              struct snd_kcontrol *ctrl, int event)
33 {
34         gpio_set_value(N526_AMP_EN_GPIO, !SND_SOC_DAPM_EVENT_OFF(event));
35         return 0;
36 }
37
38 static const struct snd_soc_dapm_widget n526_widgets[] = {
39         SND_SOC_DAPM_SPK("Speaker", n526_spk_event),
40         SND_SOC_DAPM_HP("Headphone", NULL),
41         SND_SOC_DAPM_MIC("Mic", NULL),
42 };
43
44 static const struct snd_soc_dapm_route n526_routes[] = {
45         {"Mic", NULL, "MIC"},
46         {"Speaker", NULL, "LOUT"},
47         {"Speaker", NULL, "ROUT"},
48         {"Headphone", NULL, "LOUT"},
49         {"Headphone", NULL, "ROUT"},
50 };
51
52 static const struct snd_kcontrol_new n526_controls[] = {
53         SOC_DAPM_PIN_SWITCH("Speaker"),
54 };
55
56 #define N526_DAIFMT (SND_SOC_DAIFMT_I2S | \
57                         SND_SOC_DAIFMT_NB_NF | \
58                         SND_SOC_DAIFMT_CBM_CFM)
59
60 static int n526_codec_init(struct snd_soc_codec *codec)
61 {
62         int ret;
63         struct snd_soc_dai *cpu_dai = codec->socdev->card->dai_link->cpu_dai;
64         struct snd_soc_dai *codec_dai = codec->socdev->card->dai_link->codec_dai;
65
66         snd_soc_dapm_nc_pin(codec, "LIN");
67         snd_soc_dapm_nc_pin(codec, "RIN");
68
69         ret = snd_soc_dai_set_fmt(codec_dai, N526_DAIFMT);
70         if (ret < 0) {
71                 dev_err(codec->dev, "Failed to set codec dai format: %d\n", ret);
72                 return ret;
73         }
74
75         ret = snd_soc_dai_set_fmt(cpu_dai, N526_DAIFMT);
76         if (ret < 0) {
77                 dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
78                 return ret;
79         }
80
81         ret = snd_soc_dai_set_sysclk(codec_dai, JZCODEC_SYSCLK, 111,
82                 SND_SOC_CLOCK_IN);
83         if (ret < 0) {
84                 dev_err(codec->dev, "Failed to set codec dai sysclk: %d\n", ret);
85                 return ret;
86         }
87
88         snd_soc_dapm_new_controls(codec, n526_widgets, ARRAY_SIZE(n526_widgets));
89
90         snd_soc_add_controls(codec, n526_controls,
91                                 ARRAY_SIZE(n526_controls));
92
93         snd_soc_dapm_add_routes(codec, n526_routes, ARRAY_SIZE(n526_routes));
94
95         snd_soc_dapm_sync(codec);
96
97         return 0;
98 }
99
100 static struct snd_soc_dai_link n526_dai = {
101         .name = "jz-codec",
102         .stream_name = "JZCODEC",
103         .cpu_dai = &jz4740_i2s_dai,
104         .codec_dai = &jz_codec_dai,
105         .init = n526_codec_init,
106 };
107
108 static struct snd_soc_card n526 = {
109         .name = "N526",
110         .dai_link = &n526_dai,
111         .num_links = 1,
112         .platform = &jz4740_soc_platform,
113 };
114
115 static struct snd_soc_device n526_snd_devdata = {
116         .card = &n526,
117         .codec_dev = &soc_codec_dev_jzcodec,
118 };
119
120 static struct platform_device *n526_snd_device;
121
122 static int __init n526_init(void)
123 {
124         int ret;
125
126         n526_snd_device = platform_device_alloc("soc-audio", -1);
127
128         if (!n526_snd_device)
129                 return -ENOMEM;
130
131         ret = gpio_request(N526_AMP_EN_GPIO, "AMP");
132         if (ret) {
133                 pr_err("n526 snd: Failed to request AMP GPIO(%d): %d\n",
134                                 N526_AMP_EN_GPIO, ret);
135                 goto err_device_put;
136         }
137
138         gpio_direction_output(JZ_GPIO_PORTD(4), 0);
139
140         platform_set_drvdata(n526_snd_device, &n526_snd_devdata);
141         n526_snd_devdata.dev = &n526_snd_device->dev;
142         ret = platform_device_add(n526_snd_device);
143         if (ret) {
144                 pr_err("n526 snd: Failed to add snd soc device: %d\n", ret);
145                 goto err_unset_pdata;
146         }
147
148          return 0;
149
150 err_unset_pdata:
151         platform_set_drvdata(n526_snd_device, NULL);
152         gpio_free(N526_AMP_EN_GPIO);
153 err_device_put:
154         platform_device_put(n526_snd_device);
155
156         return ret;
157 }
158 module_init(n526_init);
159
160 static void __exit n526_exit(void)
161 {
162         gpio_free(N526_AMP_EN_GPIO);
163         platform_device_unregister(n526_snd_device);
164 }
165 module_exit(n526_exit);
166
167 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
168 MODULE_DESCRIPTION("ALSA SoC N526 audio support");
169 MODULE_LICENSE("GPL v2");