target/linux/xburst/files-2.6.32/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");