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
  22 #include <variant/dmac.h>
  23
  24 #include "s6000-pcm.h"
  25 #include "s6000-i2s.h"
  26
  27 #define S6105_CAM_CODEC_CLOCK 12288000
  28
  29 static int s6105_hw_params(struct snd_pcm_substream *substream,
  30                            struct snd_pcm_hw_params *params)
  31 {
  32         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  33         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  34         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  35         int ret = 0;
  36
  37         /* set codec DAI configuration */
  38         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  39                                              SND_SOC_DAIFMT_CBM_CFM);
  40         if (ret < 0)
  41                 return ret;
  42
  43         /* set cpu DAI configuration */
  44         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
  45                                            SND_SOC_DAIFMT_NB_NF);
  46         if (ret < 0)
  47                 return ret;
  48
  49         /* set the codec system clock */
  50         ret = snd_soc_dai_set_sysclk(codec_dai, 0, S6105_CAM_CODEC_CLOCK,
  51                                             SND_SOC_CLOCK_OUT);
  52         if (ret < 0)
  53                 return ret;
  54
  55         return 0;
  56 }
  57
  58 static struct snd_soc_ops s6105_ops = {
  59         .hw_params = s6105_hw_params,
  60 };
  61
  62 /* s6105 machine dapm widgets */
  63 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  64         SND_SOC_DAPM_LINE("Audio Out Differential", NULL),
  65         SND_SOC_DAPM_LINE("Audio Out Stereo", NULL),
  66         SND_SOC_DAPM_LINE("Audio In", NULL),
  67 };
  68
  69 /* s6105 machine audio_mapnections to the codec pins */
  70 static const struct snd_soc_dapm_route audio_map[] = {
  71         /* Audio Out connected to HPLOUT, HPLCOM, HPROUT */
  72         {"Audio Out Differential", NULL, "HPLOUT"},
  73         {"Audio Out Differential", NULL, "HPLCOM"},
  74         {"Audio Out Stereo", NULL, "HPLOUT"},
  75         {"Audio Out Stereo", NULL, "HPROUT"},
  76
  77         /* Audio In connected to LINE1L, LINE1R */
  78         {"LINE1L", NULL, "Audio In"},
  79         {"LINE1R", NULL, "Audio In"},
  80 };
  81
  82 static int output_type_info(struct snd_kcontrol *kcontrol,
  83                             struct snd_ctl_elem_info *uinfo)
  84 {
  85         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
  86         uinfo->count = 1;
  87         uinfo->value.enumerated.items = 2;
  88         if (uinfo->value.enumerated.item) {
  89                 uinfo->value.enumerated.item = 1;
  90                 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPROUT");
  91         } else {
  92                 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPLCOM");
  93         }
  94         return 0;
  95 }
  96
  97 static int output_type_get(struct snd_kcontrol *kcontrol,
  98                            struct snd_ctl_elem_value *ucontrol)
  99 {
 100         ucontrol->value.enumerated.item[0] = kcontrol->private_value;
 101         return 0;
 102 }
 103
 104 static int output_type_put(struct snd_kcontrol *kcontrol,
 105                            struct snd_ctl_elem_value *ucontrol)
 106 {
 107         struct snd_soc_card *card = kcontrol->private_data;
 108         struct snd_soc_dapm_context *dapm = &card->dapm;
 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(dapm, val ? differential : stereo);
 117         snd_soc_dapm_sync(dapm);
 118         snd_soc_dapm_enable_pin(dapm, val ? stereo : differential);
 119         snd_soc_dapm_sync(dapm);
 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_pcm_runtime *rtd)
 137 {
 138         struct snd_soc_codec *codec = rtd->codec;
 139         struct snd_soc_dapm_context *dapm = &codec->dapm;
 140         struct snd_soc_card *card = rtd->card;
 141
 142         /* not present */
 143         snd_soc_dapm_nc_pin(dapm, "MONO_LOUT");
 144         snd_soc_dapm_nc_pin(dapm, "LINE2L");
 145         snd_soc_dapm_nc_pin(dapm, "LINE2R");
 146
 147         /* not connected */
 148         snd_soc_dapm_nc_pin(dapm, "MIC3L"); /* LINE2L on this chip */
 149         snd_soc_dapm_nc_pin(dapm, "MIC3R"); /* LINE2R on this chip */
 150         snd_soc_dapm_nc_pin(dapm, "LLOUT");
 151         snd_soc_dapm_nc_pin(dapm, "RLOUT");
 152         snd_soc_dapm_nc_pin(dapm, "HPRCOM");
 153
 154         /* must correspond to audio_out_mux.private_value initializer */
 155         snd_soc_dapm_disable_pin(&card->dapm, "Audio Out Differential");
 156
 157         snd_ctl_add(card->snd_card, snd_ctl_new1(&audio_out_mux, card));
 158
 159         return 0;
 160 }
 161
 162 /* s6105 digital audio interface glue - connects codec <--> CPU */
 163 static struct snd_soc_dai_link s6105_dai = {
 164         .name = "TLV320AIC31",
 165         .stream_name = "AIC31",
 166         .cpu_dai_name = "s6000-i2s",
 167         .codec_dai_name = "tlv320aic3x-hifi",
 168         .platform_name = "s6000-pcm-audio",
 169         .codec_name = "tlv320aic3x-codec.0-001a",
 170         .init = s6105_aic3x_init,
 171         .ops = &s6105_ops,
 172 };
 173
 174 /* s6105 audio machine driver */
 175 static struct snd_soc_card snd_soc_card_s6105 = {
 176         .name = "Stretch IP Camera",
 177         .owner = THIS_MODULE,
 178         .dai_link = &s6105_dai,
 179         .num_links = 1,
 180
 181         .dapm_widgets = aic3x_dapm_widgets,
 182         .num_dapm_widgets = ARRAY_SIZE(aic3x_dapm_widgets),
 183         .dapm_routes = audio_map,
 184         .num_dapm_routes = ARRAY_SIZE(audio_map),
 185 };
 186
 187 static struct s6000_snd_platform_data s6105_snd_data __initdata = {
 188         .wide           = 0,
 189         .channel_in     = 0,
 190         .channel_out    = 1,
 191         .lines_in       = 1,
 192         .lines_out      = 1,
 193         .same_rate      = 1,
 194 };
 195
 196 static struct platform_device *s6105_snd_device;
 197
 198 /* temporary i2c device creation until this can be moved into the machine
 199  * support file.
 200 */
 201 static struct i2c_board_info i2c_device[] = {
 202         { I2C_BOARD_INFO("tlv320aic33", 0x18), }
 203 };
 204
 205 static int __init s6105_init(void)
 206 {
 207         int ret;
 208
 209         i2c_register_board_info(0, i2c_device, ARRAY_SIZE(i2c_device));
 210
 211         s6105_snd_device = platform_device_alloc("soc-audio", -1);
 212         if (!s6105_snd_device)
 213                 return -ENOMEM;
 214
 215         platform_set_drvdata(s6105_snd_device, &snd_soc_card_s6105);
 216         platform_device_add_data(s6105_snd_device, &s6105_snd_data,
 217                                  sizeof(s6105_snd_data));
 218
 219         ret = platform_device_add(s6105_snd_device);
 220         if (ret)
 221                 platform_device_put(s6105_snd_device);
 222
 223         return ret;
 224 }
 225
 226 static void __exit s6105_exit(void)
 227 {
 228         platform_device_unregister(s6105_snd_device);
 229 }
 230
 231 module_init(s6105_init);
 232 module_exit(s6105_exit);
 233
 234 MODULE_AUTHOR("Daniel Gloeckner");
 235 MODULE_DESCRIPTION("Stretch s6105 IP camera ASoC driver");
 236 MODULE_LICENSE("GPL");