release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/s6000/s6105-ipcam.c

   1 /*
   2  * ASoC driver for Stretch s6105 IP camera platform
   3  *
   4  * Author:      Daniel Gloeckner, <dg@emlix.com>
   5  * Copyright:   (C) 2009 emlix GmbH <info@emlix.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/timer.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/i2c.h>
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/soc.h>
  21 #include <sound/soc-dapm.h>
  22
  23 #include <variant/dmac.h>
  24
  25 #include "../codecs/tlv320aic3x.h"
  26 #include "s6000-pcm.h"
  27 #include "s6000-i2s.h"
  28
  29 #define S6105_CAM_CODEC_CLOCK 12288000
  30
  31 static int s6105_hw_params(struct snd_pcm_substream *substream,
  32                            struct snd_pcm_hw_params *params)
  33 {
  34         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  35         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  36         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  37         int ret = 0;
  38
  39         /* set codec DAI configuration */
  40         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  41                                              SND_SOC_DAIFMT_CBM_CFM);
  42         if (ret < 0)
  43                 return ret;
  44
  45         /* set cpu DAI configuration */
  46         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
  47                                            SND_SOC_DAIFMT_NB_NF);
  48         if (ret < 0)
  49                 return ret;
  50
  51         /* set the codec system clock */
  52         ret = snd_soc_dai_set_sysclk(codec_dai, 0, S6105_CAM_CODEC_CLOCK,
  53                                             SND_SOC_CLOCK_OUT);
  54         if (ret < 0)
  55                 return ret;
  56
  57         return 0;
  58 }
  59
  60 static struct snd_soc_ops s6105_ops = {
  61         .hw_params = s6105_hw_params,
  62 };
  63
  64 /* s6105 machine dapm widgets */
  65 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  66         SND_SOC_DAPM_LINE("Audio Out Differential", NULL),
  67         SND_SOC_DAPM_LINE("Audio Out Stereo", NULL),
  68         SND_SOC_DAPM_LINE("Audio In", NULL),
  69 };
  70
  71 /* s6105 machine audio_mapnections to the codec pins */
  72 static const struct snd_soc_dapm_route audio_map[] = {
  73         /* Audio Out connected to HPLOUT, HPLCOM, HPROUT */
  74         {"Audio Out Differential", NULL, "HPLOUT"},
  75         {"Audio Out Differential", NULL, "HPLCOM"},
  76         {"Audio Out Stereo", NULL, "HPLOUT"},
  77         {"Audio Out Stereo", NULL, "HPROUT"},
  78
  79         /* Audio In connected to LINE1L, LINE1R */
  80         {"LINE1L", NULL, "Audio In"},
  81         {"LINE1R", NULL, "Audio In"},
  82 };
  83
  84 static int output_type_info(struct snd_kcontrol *kcontrol,
  85                             struct snd_ctl_elem_info *uinfo)
  86 {
  87         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
  88         uinfo->count = 1;
  89         uinfo->value.enumerated.items = 2;
  90         if (uinfo->value.enumerated.item) {
  91                 uinfo->value.enumerated.item = 1;
  92                 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPROUT");
  93         } else {
  94                 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPLCOM");
  95         }
  96         return 0;
  97 }
  98
  99 static int output_type_get(struct snd_kcontrol *kcontrol,
 100                            struct snd_ctl_elem_value *ucontrol)
 101 {
 102         ucontrol->value.enumerated.item[0] = kcontrol->private_value;
 103         return 0;
 104 }
 105
 106 static int output_type_put(struct snd_kcontrol *kcontrol,
 107                            struct snd_ctl_elem_value *ucontrol)
 108 {
 109         struct snd_soc_codec *codec = kcontrol->private_data;
 110         unsigned int val = (ucontrol->value.enumerated.item[0] != 0);
 111         char *differential = "Audio Out Differential";
 112         char *stereo = "Audio Out Stereo";
 113
 114         if (kcontrol->private_value == val)
 115                 return 0;
 116         kcontrol->private_value = val;
 117         snd_soc_dapm_disable_pin(codec, val ? differential : stereo);
 118         snd_soc_dapm_sync(codec);
 119         snd_soc_dapm_enable_pin(codec, val ? stereo : differential);
 120         snd_soc_dapm_sync(codec);
 121
 122         return 1;
 123 }
 124
 125 static const struct snd_kcontrol_new audio_out_mux = {
 126         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 127         .name = "Master Output Mux",
 128         .index = 0,
 129         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 130         .info = output_type_info,
 131         .get = output_type_get,
 132         .put = output_type_put,
 133         .private_value = 1 /* default to stereo */
 134 };
 135
 136 /* Logic for a aic3x as connected on the s6105 ip camera ref design */
 137 static int s6105_aic3x_init(struct snd_soc_codec *codec)
 138 {
 139         /* Add s6105 specific widgets */
 140         snd_soc_dapm_new_controls(codec, aic3x_dapm_widgets,
 141                                   ARRAY_SIZE(aic3x_dapm_widgets));
 142
 143         /* Set up s6105 specific audio path audio_map */
 144         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 145
 146         /* not present */
 147         snd_soc_dapm_nc_pin(codec, "MONO_LOUT");
 148         snd_soc_dapm_nc_pin(codec, "LINE2L");
 149         snd_soc_dapm_nc_pin(codec, "LINE2R");
 150
 151         /* not connected */
 152         snd_soc_dapm_nc_pin(codec, "MIC3L"); /* LINE2L on this chip */
 153         snd_soc_dapm_nc_pin(codec, "MIC3R"); /* LINE2R on this chip */
 154         snd_soc_dapm_nc_pin(codec, "LLOUT");
 155         snd_soc_dapm_nc_pin(codec, "RLOUT");
 156         snd_soc_dapm_nc_pin(codec, "HPRCOM");
 157
 158         /* always connected */
 159         snd_soc_dapm_enable_pin(codec, "Audio In");
 160
 161         /* must correspond to audio_out_mux.private_value initializer */
 162         snd_soc_dapm_disable_pin(codec, "Audio Out Differential");
 163         snd_soc_dapm_sync(codec);
 164         snd_soc_dapm_enable_pin(codec, "Audio Out Stereo");
 165
 166         snd_soc_dapm_sync(codec);
 167
 168         snd_ctl_add(codec->card, snd_ctl_new1(&audio_out_mux, codec));
 169
 170         return 0;
 171 }
 172
 173 /* s6105 digital audio interface glue - connects codec <--> CPU */
 174 static struct snd_soc_dai_link s6105_dai = {
 175         .name = "TLV320AIC31",
 176         .stream_name = "AIC31",
 177         .cpu_dai = &s6000_i2s_dai,
 178         .codec_dai = &aic3x_dai,
 179         .init = s6105_aic3x_init,
 180         .ops = &s6105_ops,
 181 };
 182
 183 /* s6105 audio machine driver */
 184 static struct snd_soc_card snd_soc_card_s6105 = {
 185         .name = "Stretch IP Camera",
 186         .platform = &s6000_soc_platform,
 187         .dai_link = &s6105_dai,
 188         .num_links = 1,
 189 };
 190
 191 /* s6105 audio private data */
 192 static struct aic3x_setup_data s6105_aic3x_setup = {
 193 };
 194
 195 /* s6105 audio subsystem */
 196 static struct snd_soc_device s6105_snd_devdata = {
 197         .card = &snd_soc_card_s6105,
 198         .codec_dev = &soc_codec_dev_aic3x,
 199         .codec_data = &s6105_aic3x_setup,
 200 };
 201
 202 static struct s6000_snd_platform_data __initdata s6105_snd_data = {
 203         .wide           = 0,
 204         .channel_in     = 0,
 205         .channel_out    = 1,
 206         .lines_in       = 1,
 207         .lines_out      = 1,
 208         .same_rate      = 1,
 209 };
 210
 211 static struct platform_device *s6105_snd_device;
 212
 213 /* temporary i2c device creation until this can be moved into the machine
 214  * support file.
 215 */
 216 static struct i2c_board_info i2c_device[] = {
 217         { I2C_BOARD_INFO("tlv320aic33", 0x18), }
 218 };
 219
 220 static int __init s6105_init(void)
 221 {
 222         int ret;
 223
 224         i2c_register_board_info(0, i2c_device, ARRAY_SIZE(i2c_device));
 225
 226         s6105_snd_device = platform_device_alloc("soc-audio", -1);
 227         if (!s6105_snd_device)
 228                 return -ENOMEM;
 229
 230         platform_set_drvdata(s6105_snd_device, &s6105_snd_devdata);
 231         s6105_snd_devdata.dev = &s6105_snd_device->dev;
 232         platform_device_add_data(s6105_snd_device, &s6105_snd_data,
 233                                  sizeof(s6105_snd_data));
 234
 235         ret = platform_device_add(s6105_snd_device);
 236         if (ret)
 237                 platform_device_put(s6105_snd_device);
 238
 239         return ret;
 240 }
 241
 242 static void __exit s6105_exit(void)
 243 {
 244         platform_device_unregister(s6105_snd_device);
 245 }
 246
 247 module_init(s6105_init);
 248 module_exit(s6105_exit);
 249
 250 MODULE_AUTHOR("Daniel Gloeckner");
 251 MODULE_DESCRIPTION("Stretch s6105 IP camera ASoC driver");
 252 MODULE_LICENSE("GPL");