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 <sound/core.h>
  18 #include <sound/pcm.h>
  19 #include <sound/soc.h>
  20 #include <sound/soc-dapm.h>
  21
  22 #include <variant/dmac.h>
  23
  24 #include "../codecs/tlv320aic3x.h"
  25 #include "s6000-pcm.h"
  26 #include "s6000-i2s.h"
  27
  28 #define S6105_CAM_CODEC_CLOCK 12288000
  29
  30 static int s6105_hw_params(struct snd_pcm_substream *substream,
  31                            struct snd_pcm_hw_params *params)
  32 {
  33         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  34         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  35         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  36         int ret = 0;
  37
  38         /* set codec DAI configuration */
  39         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  40                                              SND_SOC_DAIFMT_CBM_CFM);
  41         if (ret < 0)
  42                 return ret;
  43
  44         /* set cpu DAI configuration */
  45         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
  46                                            SND_SOC_DAIFMT_NB_NF);
  47         if (ret < 0)
  48                 return ret;
  49
  50         /* set the codec system clock */
  51         ret = snd_soc_dai_set_sysclk(codec_dai, 0, S6105_CAM_CODEC_CLOCK,
  52                                             SND_SOC_CLOCK_OUT);
  53         if (ret < 0)
  54                 return ret;
  55
  56         return 0;
  57 }
  58
  59 static struct snd_soc_ops s6105_ops = {
  60         .hw_params = s6105_hw_params,
  61 };
  62
  63 /* s6105 machine dapm widgets */
  64 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  65         SND_SOC_DAPM_LINE("Audio Out Differential", NULL),
  66         SND_SOC_DAPM_LINE("Audio Out Stereo", NULL),
  67         SND_SOC_DAPM_LINE("Audio In", NULL),
  68 };
  69
  70 /* s6105 machine audio_mapnections to the codec pins */
  71 static const struct snd_soc_dapm_route audio_map[] = {
  72         /* Audio Out connected to HPLOUT, HPLCOM, HPROUT */
  73         {"Audio Out Differential", NULL, "HPLOUT"},
  74         {"Audio Out Differential", NULL, "HPLCOM"},
  75         {"Audio Out Stereo", NULL, "HPLOUT"},
  76         {"Audio Out Stereo", NULL, "HPROUT"},
  77
  78         /* Audio In connected to LINE1L, LINE1R */
  79         {"LINE1L", NULL, "Audio In"},
  80         {"LINE1R", NULL, "Audio In"},
  81 };
  82
  83 static int output_type_info(struct snd_kcontrol *kcontrol,
  84                             struct snd_ctl_elem_info *uinfo)
  85 {
  86         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
  87         uinfo->count = 1;
  88         uinfo->value.enumerated.items = 2;
  89         if (uinfo->value.enumerated.item) {
  90                 uinfo->value.enumerated.item = 1;
  91                 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPROUT");
  92         } else {
  93                 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPLCOM");
  94         }
  95         return 0;
  96 }
  97
  98 static int output_type_get(struct snd_kcontrol *kcontrol,
  99                            struct snd_ctl_elem_value *ucontrol)
 100 {
 101         ucontrol->value.enumerated.item[0] = kcontrol->private_value;
 102         return 0;
 103 }
 104
 105 static int output_type_put(struct snd_kcontrol *kcontrol,
 106                            struct snd_ctl_elem_value *ucontrol)
 107 {
 108         struct snd_soc_codec *codec = kcontrol->private_data;
 109         unsigned int val = (ucontrol->value.enumerated.item[0] != 0);
 110         char *differential = "Audio Out Differential";
 111         char *stereo = "Audio Out Stereo";
 112
 113         if (kcontrol->private_value == val)
 114                 return 0;
 115         kcontrol->private_value = val;
 116         snd_soc_dapm_disable_pin(codec, val ? differential : stereo);
 117         snd_soc_dapm_sync(codec);
 118         snd_soc_dapm_enable_pin(codec, val ? stereo : differential);
 119         snd_soc_dapm_sync(codec);
 120
 121         return 1;
 122 }
 123
 124 static const struct snd_kcontrol_new audio_out_mux = {
 125         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 126         .name = "Master Output Mux",
 127         .index = 0,
 128         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 129         .info = output_type_info,
 130         .get = output_type_get,
 131         .put = output_type_put,
 132         .private_value = 1 /* default to stereo */
 133 };
 134
 135 /* Logic for a aic3x as connected on the s6105 ip camera ref design */
 136 static int s6105_aic3x_init(struct snd_soc_codec *codec)
 137 {
 138         /* Add s6105 specific widgets */
 139         snd_soc_dapm_new_controls(codec, aic3x_dapm_widgets,
 140                                   ARRAY_SIZE(aic3x_dapm_widgets));
 141
 142         /* Set up s6105 specific audio path audio_map */
 143         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 144
 145         /* not present */
 146         snd_soc_dapm_nc_pin(codec, "MONO_LOUT");
 147         snd_soc_dapm_nc_pin(codec, "LINE2L");
 148         snd_soc_dapm_nc_pin(codec, "LINE2R");
 149
 150         /* not connected */
 151         snd_soc_dapm_nc_pin(codec, "MIC3L"); /* LINE2L on this chip */
 152         snd_soc_dapm_nc_pin(codec, "MIC3R"); /* LINE2R on this chip */
 153         snd_soc_dapm_nc_pin(codec, "LLOUT");
 154         snd_soc_dapm_nc_pin(codec, "RLOUT");
 155         snd_soc_dapm_nc_pin(codec, "HPRCOM");
 156
 157         /* always connected */
 158         snd_soc_dapm_enable_pin(codec, "Audio In");
 159
 160         /* must correspond to audio_out_mux.private_value initializer */
 161         snd_soc_dapm_disable_pin(codec, "Audio Out Differential");
 162         snd_soc_dapm_sync(codec);
 163         snd_soc_dapm_enable_pin(codec, "Audio Out Stereo");
 164
 165         snd_soc_dapm_sync(codec);
 166
 167         snd_ctl_add(codec->card, snd_ctl_new1(&audio_out_mux, codec));
 168
 169         return 0;
 170 }
 171
 172 /* s6105 digital audio interface glue - connects codec <--> CPU */
 173 static struct snd_soc_dai_link s6105_dai = {
 174         .name = "TLV320AIC31",
 175         .stream_name = "AIC31",
 176         .cpu_dai = &s6000_i2s_dai,
 177         .codec_dai = &aic3x_dai,
 178         .init = s6105_aic3x_init,
 179         .ops = &s6105_ops,
 180 };
 181
 182 /* s6105 audio machine driver */
 183 static struct snd_soc_card snd_soc_card_s6105 = {
 184         .name = "Stretch IP Camera",
 185         .platform = &s6000_soc_platform,
 186         .dai_link = &s6105_dai,
 187         .num_links = 1,
 188 };
 189
 190 /* s6105 audio private data */
 191 static struct aic3x_setup_data s6105_aic3x_setup = {
 192         .i2c_bus = 0,
 193         .i2c_address = 0x18,
 194 };
 195
 196 /* s6105 audio subsystem */
 197 static struct snd_soc_device s6105_snd_devdata = {
 198         .card = &snd_soc_card_s6105,
 199         .codec_dev = &soc_codec_dev_aic3x,
 200         .codec_data = &s6105_aic3x_setup,
 201 };
 202
 203 static struct s6000_snd_platform_data __initdata s6105_snd_data = {
 204         .wide           = 0,
 205         .channel_in     = 0,
 206         .channel_out    = 1,
 207         .lines_in       = 1,
 208         .lines_out      = 1,
 209         .same_rate      = 1,
 210 };
 211
 212 static struct platform_device *s6105_snd_device;
 213
 214 static int __init s6105_init(void)
 215 {
 216         int ret;
 217
 218         s6105_snd_device = platform_device_alloc("soc-audio", -1);
 219         if (!s6105_snd_device)
 220                 return -ENOMEM;
 221
 222         platform_set_drvdata(s6105_snd_device, &s6105_snd_devdata);
 223         s6105_snd_devdata.dev = &s6105_snd_device->dev;
 224         platform_device_add_data(s6105_snd_device, &s6105_snd_data,
 225                                  sizeof(s6105_snd_data));
 226
 227         ret = platform_device_add(s6105_snd_device);
 228         if (ret)
 229                 platform_device_put(s6105_snd_device);
 230
 231         return ret;
 232 }
 233
 234 static void __exit s6105_exit(void)
 235 {
 236         platform_device_unregister(s6105_snd_device);
 237 }
 238
 239 module_init(s6105_init);
 240 module_exit(s6105_exit);
 241
 242 MODULE_AUTHOR("Daniel Gloeckner");
 243 MODULE_DESCRIPTION("Stretch s6105 IP camera ASoC driver");
 244 MODULE_LICENSE("GPL");