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 "s6000-pcm.h"
  23 #include "s6000-i2s.h"
  24
  25 #define S6105_CAM_CODEC_CLOCK 12288000
  26
  27 static int s6105_hw_params(struct snd_pcm_substream *substream,
  28                            struct snd_pcm_hw_params *params)
  29 {
  30         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  31         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  32         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  33         int ret = 0;
  34
  35         /* set codec DAI configuration */
  36         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  37                                              SND_SOC_DAIFMT_CBM_CFM);
  38         if (ret < 0)
  39                 return ret;
  40
  41         /* set cpu DAI configuration */
  42         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
  43                                            SND_SOC_DAIFMT_NB_NF);
  44         if (ret < 0)
  45                 return ret;
  46
  47         /* set the codec system clock */
  48         ret = snd_soc_dai_set_sysclk(codec_dai, 0, S6105_CAM_CODEC_CLOCK,
  49                                             SND_SOC_CLOCK_OUT);
  50         if (ret < 0)
  51                 return ret;
  52
  53         return 0;
  54 }
  55
  56 static struct snd_soc_ops s6105_ops = {
  57         .hw_params = s6105_hw_params,
  58 };
  59
  60 /* s6105 machine dapm widgets */
  61 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
  62         SND_SOC_DAPM_LINE("Audio Out Differential", NULL),
  63         SND_SOC_DAPM_LINE("Audio Out Stereo", NULL),
  64         SND_SOC_DAPM_LINE("Audio In", NULL),
  65 };
  66
  67 /* s6105 machine audio_mapnections to the codec pins */
  68 static const struct snd_soc_dapm_route audio_map[] = {
  69         /* Audio Out connected to HPLOUT, HPLCOM, HPROUT */
  70         {"Audio Out Differential", NULL, "HPLOUT"},
  71         {"Audio Out Differential", NULL, "HPLCOM"},
  72         {"Audio Out Stereo", NULL, "HPLOUT"},
  73         {"Audio Out Stereo", NULL, "HPROUT"},
  74
  75         /* Audio In connected to LINE1L, LINE1R */
  76         {"LINE1L", NULL, "Audio In"},
  77         {"LINE1R", NULL, "Audio In"},
  78 };
  79
  80 static int output_type_info(struct snd_kcontrol *kcontrol,
  81                             struct snd_ctl_elem_info *uinfo)
  82 {
  83         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
  84         uinfo->count = 1;
  85         uinfo->value.enumerated.items = 2;
  86         if (uinfo->value.enumerated.item) {
  87                 uinfo->value.enumerated.item = 1;
  88                 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPROUT");
  89         } else {
  90                 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPLCOM");
  91         }
  92         return 0;
  93 }
  94
  95 static int output_type_get(struct snd_kcontrol *kcontrol,
  96                            struct snd_ctl_elem_value *ucontrol)
  97 {
  98         ucontrol->value.enumerated.item[0] = kcontrol->private_value;
  99         return 0;
 100 }
 101
 102 static int output_type_put(struct snd_kcontrol *kcontrol,
 103                            struct snd_ctl_elem_value *ucontrol)
 104 {
 105         struct snd_soc_card *card = kcontrol->private_data;
 106         struct snd_soc_dapm_context *dapm = &card->dapm;
 107         unsigned int val = (ucontrol->value.enumerated.item[0] != 0);
 108         char *differential = "Audio Out Differential";
 109         char *stereo = "Audio Out Stereo";
 110
 111         if (kcontrol->private_value == val)
 112                 return 0;
 113         kcontrol->private_value = val;
 114         snd_soc_dapm_disable_pin(dapm, val ? differential : stereo);
 115         snd_soc_dapm_sync(dapm);
 116         snd_soc_dapm_enable_pin(dapm, val ? stereo : differential);
 117         snd_soc_dapm_sync(dapm);
 118
 119         return 1;
 120 }
 121
 122 static const struct snd_kcontrol_new audio_out_mux = {
 123         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 124         .name = "Master Output Mux",
 125         .index = 0,
 126         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 127         .info = output_type_info,
 128         .get = output_type_get,
 129         .put = output_type_put,
 130         .private_value = 1 /* default to stereo */
 131 };
 132
 133 /* Logic for a aic3x as connected on the s6105 ip camera ref design */
 134 static int s6105_aic3x_init(struct snd_soc_pcm_runtime *rtd)
 135 {
 136         struct snd_soc_card *card = rtd->card;
 137
 138         /* must correspond to audio_out_mux.private_value initializer */
 139         snd_soc_dapm_disable_pin(&card->dapm, "Audio Out Differential");
 140
 141         snd_ctl_add(card->snd_card, snd_ctl_new1(&audio_out_mux, card));
 142
 143         return 0;
 144 }
 145
 146 /* s6105 digital audio interface glue - connects codec <--> CPU */
 147 static struct snd_soc_dai_link s6105_dai = {
 148         .name = "TLV320AIC31",
 149         .stream_name = "AIC31",
 150         .cpu_dai_name = "s6000-i2s",
 151         .codec_dai_name = "tlv320aic3x-hifi",
 152         .platform_name = "s6000-pcm-audio",
 153         .codec_name = "tlv320aic3x-codec.0-001a",
 154         .init = s6105_aic3x_init,
 155         .ops = &s6105_ops,
 156 };
 157
 158 /* s6105 audio machine driver */
 159 static struct snd_soc_card snd_soc_card_s6105 = {
 160         .name = "Stretch IP Camera",
 161         .owner = THIS_MODULE,
 162         .dai_link = &s6105_dai,
 163         .num_links = 1,
 164
 165         .dapm_widgets = aic3x_dapm_widgets,
 166         .num_dapm_widgets = ARRAY_SIZE(aic3x_dapm_widgets),
 167         .dapm_routes = audio_map,
 168         .num_dapm_routes = ARRAY_SIZE(audio_map),
 169         .fully_routed = true,
 170 };
 171
 172 static struct s6000_snd_platform_data s6105_snd_data __initdata = {
 173         .wide           = 0,
 174         .channel_in     = 0,
 175         .channel_out    = 1,
 176         .lines_in       = 1,
 177         .lines_out      = 1,
 178         .same_rate      = 1,
 179 };
 180
 181 static struct platform_device *s6105_snd_device;
 182
 183 /* temporary i2c device creation until this can be moved into the machine
 184  * support file.
 185 */
 186 static struct i2c_board_info i2c_device[] = {
 187         { I2C_BOARD_INFO("tlv320aic33", 0x18), }
 188 };
 189
 190 static int __init s6105_init(void)
 191 {
 192         int ret;
 193
 194         i2c_register_board_info(0, i2c_device, ARRAY_SIZE(i2c_device));
 195
 196         s6105_snd_device = platform_device_alloc("soc-audio", -1);
 197         if (!s6105_snd_device)
 198                 return -ENOMEM;
 199
 200         platform_set_drvdata(s6105_snd_device, &snd_soc_card_s6105);
 201         platform_device_add_data(s6105_snd_device, &s6105_snd_data,
 202                                  sizeof(s6105_snd_data));
 203
 204         ret = platform_device_add(s6105_snd_device);
 205         if (ret)
 206                 platform_device_put(s6105_snd_device);
 207
 208         return ret;
 209 }
 210
 211 static void __exit s6105_exit(void)
 212 {
 213         platform_device_unregister(s6105_snd_device);
 214 }
 215
 216 module_init(s6105_init);
 217 module_exit(s6105_exit);
 218
 219 MODULE_AUTHOR("Daniel Gloeckner");
 220 MODULE_DESCRIPTION("Stretch s6105 IP camera ASoC driver");
 221 MODULE_LICENSE("GPL");