sound/soc/codecs/si476x.c

   1 #include <linux/module.h>
   2 #include <linux/slab.h>
   3 #include <sound/pcm.h>
   4 #include <sound/pcm_params.h>
   5 #include <sound/soc.h>
   6 #include <sound/initval.h>
   7
   8 #include <linux/i2c.h>
   9
  10 #include <linux/mfd/si476x-core.h>
  11
  12 enum si476x_audio_registers {
  13         SI476X_DIGITAL_IO_OUTPUT_FORMAT         = 0x0203,
  14         SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE    = 0x0202,
  15 };
  16
  17 enum si476x_digital_io_output_format {
  18         SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT       = 11,
  19         SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT     = 8,
  20 };
  21
  22 #define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK     ((0b111 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \
  23                                                   (0b111 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT))
  24 #define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK    (0b1111110)
  25
  26 enum si476x_daudio_formats {
  27         SI476X_DAUDIO_MODE_I2S          = (0x0 << 1),
  28         SI476X_DAUDIO_MODE_DSP_A        = (0x6 << 1),
  29         SI476X_DAUDIO_MODE_DSP_B        = (0x7 << 1),
  30         SI476X_DAUDIO_MODE_LEFT_J       = (0x8 << 1),
  31         SI476X_DAUDIO_MODE_RIGHT_J      = (0x9 << 1),
  32
  33         SI476X_DAUDIO_MODE_IB           = (1 << 5),
  34         SI476X_DAUDIO_MODE_IF           = (1 << 6),
  35 };
  36
  37 enum si476x_pcm_format {
  38         SI476X_PCM_FORMAT_S8            = 2,
  39         SI476X_PCM_FORMAT_S16_LE        = 4,
  40         SI476X_PCM_FORMAT_S20_3LE       = 5,
  41         SI476X_PCM_FORMAT_S24_LE        = 6,
  42 };
  43
  44 static unsigned int si476x_codec_read(struct snd_soc_codec *codec,
  45                                       unsigned int reg)
  46 {
  47         int err;
  48         struct si476x_core *core = codec->control_data;
  49
  50         si476x_core_lock(core);
  51         err = si476x_core_cmd_get_property(core, reg);
  52         si476x_core_unlock(core);
  53
  54         return err;
  55 }
  56
  57 static int si476x_codec_write(struct snd_soc_codec *codec,
  58                               unsigned int reg, unsigned int val)
  59 {
  60         int err;
  61         struct si476x_core *core = codec->control_data;
  62
  63         si476x_core_lock(core);
  64         err = si476x_core_cmd_set_property(core, reg, val);
  65         si476x_core_unlock(core);
  66
  67         return err;
  68 }
  69
  70 static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
  71                                     unsigned int fmt)
  72 {
  73         int err;
  74         u16 format = 0;
  75
  76         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
  77                 return -EINVAL;
  78
  79         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  80         case SND_SOC_DAIFMT_DSP_A:
  81                 format |= SI476X_DAUDIO_MODE_DSP_A;
  82                 break;
  83         case SND_SOC_DAIFMT_DSP_B:
  84                 format |= SI476X_DAUDIO_MODE_DSP_B;
  85                 break;
  86         case SND_SOC_DAIFMT_I2S:
  87                 format |= SI476X_DAUDIO_MODE_I2S;
  88                 break;
  89         case SND_SOC_DAIFMT_RIGHT_J:
  90                 format |= SI476X_DAUDIO_MODE_RIGHT_J;
  91                 break;
  92         case SND_SOC_DAIFMT_LEFT_J:
  93                 format |= SI476X_DAUDIO_MODE_LEFT_J;
  94                 break;
  95         default:
  96                 return -EINVAL;
  97         }
  98
  99         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 100         case SND_SOC_DAIFMT_DSP_A:
 101         case SND_SOC_DAIFMT_DSP_B:
 102                 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 103                 case SND_SOC_DAIFMT_NB_NF:
 104                         break;
 105                 case SND_SOC_DAIFMT_IB_NF:
 106                         format |= SI476X_DAUDIO_MODE_IB;
 107                         break;
 108                 default:
 109                         return -EINVAL;
 110                 }
 111                 break;
 112         case SND_SOC_DAIFMT_I2S:
 113         case SND_SOC_DAIFMT_RIGHT_J:
 114         case SND_SOC_DAIFMT_LEFT_J:
 115                 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 116                 case SND_SOC_DAIFMT_NB_NF:
 117                         break;
 118                 case SND_SOC_DAIFMT_IB_IF:
 119                         format |= SI476X_DAUDIO_MODE_IB |
 120                                 SI476X_DAUDIO_MODE_IF;
 121                         break;
 122                 case SND_SOC_DAIFMT_IB_NF:
 123                         format |= SI476X_DAUDIO_MODE_IB;
 124                         break;
 125                 case SND_SOC_DAIFMT_NB_IF:
 126                         format |= SI476X_DAUDIO_MODE_IF;
 127                         break;
 128                 default:
 129                         return -EINVAL;
 130                 }
 131                 break;
 132         default:
 133                 return -EINVAL;
 134         }
 135
 136         err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
 137                                   SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
 138                                   format);
 139         if (err < 0) {
 140                 dev_err(codec_dai->codec->dev, "Failed to set output format\n");
 141                 return err;
 142         }
 143
 144         return 0;
 145 }
 146
 147 static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
 148                                   struct snd_pcm_hw_params *params,
 149                                   struct snd_soc_dai *dai)
 150 {
 151         int rate, width, err;
 152
 153         rate = params_rate(params);
 154         if (rate < 32000 || rate > 48000) {
 155                 dev_err(dai->codec->dev, "Rate: %d is not supported\n", rate);
 156                 return -EINVAL;
 157         }
 158
 159         switch (params_format(params)) {
 160         case SNDRV_PCM_FORMAT_S8:
 161                 width = SI476X_PCM_FORMAT_S8;
 162         case SNDRV_PCM_FORMAT_S16_LE:
 163                 width = SI476X_PCM_FORMAT_S16_LE;
 164                 break;
 165         case SNDRV_PCM_FORMAT_S20_3LE:
 166                 width = SI476X_PCM_FORMAT_S20_3LE;
 167                 break;
 168         case SNDRV_PCM_FORMAT_S24_LE:
 169                 width = SI476X_PCM_FORMAT_S24_LE;
 170                 break;
 171         default:
 172                 return -EINVAL;
 173         }
 174
 175         err = snd_soc_write(dai->codec, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE,
 176                             rate);
 177         if (err < 0) {
 178                 dev_err(dai->codec->dev, "Failed to set sample rate\n");
 179                 return err;
 180         }
 181
 182         err = snd_soc_update_bits(dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
 183                                   SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK,
 184                                   (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) |
 185                                   (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT));
 186         if (err < 0) {
 187                 dev_err(dai->codec->dev, "Failed to set output width\n");
 188                 return err;
 189         }
 190
 191         return 0;
 192 }
 193
 194 static int si476x_codec_probe(struct snd_soc_codec *codec)
 195 {
 196         codec->control_data = i2c_mfd_cell_to_core(codec->dev);
 197         return 0;
 198 }
 199
 200 static struct snd_soc_dai_ops si476x_dai_ops = {
 201         .hw_params      = si476x_codec_hw_params,
 202         .set_fmt        = si476x_codec_set_dai_fmt,
 203 };
 204
 205 static struct snd_soc_dai_driver si476x_dai = {
 206         .name           = "si476x-codec",
 207         .capture        = {
 208                 .stream_name    = "Capture",
 209                 .channels_min   = 2,
 210                 .channels_max   = 2,
 211
 212                 .rates = SNDRV_PCM_RATE_32000 |
 213                 SNDRV_PCM_RATE_44100 |
 214                 SNDRV_PCM_RATE_48000,
 215                 .formats = SNDRV_PCM_FMTBIT_S8 |
 216                 SNDRV_PCM_FMTBIT_S16_LE |
 217                 SNDRV_PCM_FMTBIT_S20_3LE |
 218                 SNDRV_PCM_FMTBIT_S24_LE
 219         },
 220         .ops            = &si476x_dai_ops,
 221 };
 222
 223 static struct snd_soc_codec_driver soc_codec_dev_si476x = {
 224         .probe  = si476x_codec_probe,
 225         .read   = si476x_codec_read,
 226         .write  = si476x_codec_write,
 227 };
 228
 229 static int __devinit si476x_platform_probe(struct platform_device *pdev)
 230 {
 231         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x,
 232                                       &si476x_dai, 1);
 233 }
 234
 235 static int __devexit si476x_platform_remove(struct platform_device *pdev)
 236 {
 237         snd_soc_unregister_codec(&pdev->dev);
 238         return 0;
 239 }
 240
 241 MODULE_ALIAS("platform:si476x-codec");
 242
 243 static struct platform_driver si476x_platform_driver = {
 244         .driver         = {
 245                 .name   = "si476x-codec",
 246                 .owner  = THIS_MODULE,
 247         },
 248         .probe          = si476x_platform_probe,
 249         .remove         = __devexit_p(si476x_platform_remove),
 250 };
 251 module_platform_driver(si476x_platform_driver);
 252
 253 MODULE_AUTHOR("Andrey Smirnov <andrey.smirnov@convergeddevices.net>");
 254 MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
 255 MODULE_LICENSE("GPL");