sound/soc/codecs/si476x.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * sound/soc/codecs/si476x.c -- Codec driver for SI476X chips
   4  *
   5  * Copyright (C) 2012 Innovative Converged Devices(ICD)
   6  * Copyright (C) 2013 Andrey Smirnov
   7  *
   8  * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/slab.h>
  13 #include <sound/pcm.h>
  14 #include <sound/pcm_params.h>
  15 #include <linux/regmap.h>
  16 #include <sound/soc.h>
  17 #include <sound/initval.h>
  18
  19 #include <linux/i2c.h>
  20
  21 #include <linux/mfd/si476x-core.h>
  22
  23 enum si476x_audio_registers {
  24         SI476X_DIGITAL_IO_OUTPUT_FORMAT         = 0x0203,
  25         SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE    = 0x0202,
  26 };
  27
  28 enum si476x_digital_io_output_format {
  29         SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT       = 11,
  30         SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT     = 8,
  31 };
  32
  33 #define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK     ((0x7 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \
  34                                                   (0x7 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT))
  35 #define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK    (0x7e)
  36
  37 enum si476x_daudio_formats {
  38         SI476X_DAUDIO_MODE_I2S          = (0x0 << 1),
  39         SI476X_DAUDIO_MODE_DSP_A        = (0x6 << 1),
  40         SI476X_DAUDIO_MODE_DSP_B        = (0x7 << 1),
  41         SI476X_DAUDIO_MODE_LEFT_J       = (0x8 << 1),
  42         SI476X_DAUDIO_MODE_RIGHT_J      = (0x9 << 1),
  43
  44         SI476X_DAUDIO_MODE_IB           = (1 << 5),
  45         SI476X_DAUDIO_MODE_IF           = (1 << 6),
  46 };
  47
  48 enum si476x_pcm_format {
  49         SI476X_PCM_FORMAT_S8            = 2,
  50         SI476X_PCM_FORMAT_S16_LE        = 4,
  51         SI476X_PCM_FORMAT_S20_3LE       = 5,
  52         SI476X_PCM_FORMAT_S24_LE        = 6,
  53 };
  54
  55 static const struct snd_soc_dapm_widget si476x_dapm_widgets[] = {
  56 SND_SOC_DAPM_OUTPUT("LOUT"),
  57 SND_SOC_DAPM_OUTPUT("ROUT"),
  58 };
  59
  60 static const struct snd_soc_dapm_route si476x_dapm_routes[] = {
  61         { "Capture", NULL, "LOUT" },
  62         { "Capture", NULL, "ROUT" },
  63 };
  64
  65 static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
  66                                     unsigned int fmt)
  67 {
  68         struct si476x_core *core = i2c_mfd_cell_to_core(codec_dai->dev);
  69         int err;
  70         u16 format = 0;
  71
  72         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
  73                 return -EINVAL;
  74
  75         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  76         case SND_SOC_DAIFMT_DSP_A:
  77                 format |= SI476X_DAUDIO_MODE_DSP_A;
  78                 break;
  79         case SND_SOC_DAIFMT_DSP_B:
  80                 format |= SI476X_DAUDIO_MODE_DSP_B;
  81                 break;
  82         case SND_SOC_DAIFMT_I2S:
  83                 format |= SI476X_DAUDIO_MODE_I2S;
  84                 break;
  85         case SND_SOC_DAIFMT_RIGHT_J:
  86                 format |= SI476X_DAUDIO_MODE_RIGHT_J;
  87                 break;
  88         case SND_SOC_DAIFMT_LEFT_J:
  89                 format |= SI476X_DAUDIO_MODE_LEFT_J;
  90                 break;
  91         default:
  92                 return -EINVAL;
  93         }
  94
  95         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  96         case SND_SOC_DAIFMT_DSP_A:
  97         case SND_SOC_DAIFMT_DSP_B:
  98                 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
  99                 case SND_SOC_DAIFMT_NB_NF:
 100                         break;
 101                 case SND_SOC_DAIFMT_IB_NF:
 102                         format |= SI476X_DAUDIO_MODE_IB;
 103                         break;
 104                 default:
 105                         return -EINVAL;
 106                 }
 107                 break;
 108         case SND_SOC_DAIFMT_I2S:
 109         case SND_SOC_DAIFMT_RIGHT_J:
 110         case SND_SOC_DAIFMT_LEFT_J:
 111                 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 112                 case SND_SOC_DAIFMT_NB_NF:
 113                         break;
 114                 case SND_SOC_DAIFMT_IB_IF:
 115                         format |= SI476X_DAUDIO_MODE_IB |
 116                                 SI476X_DAUDIO_MODE_IF;
 117                         break;
 118                 case SND_SOC_DAIFMT_IB_NF:
 119                         format |= SI476X_DAUDIO_MODE_IB;
 120                         break;
 121                 case SND_SOC_DAIFMT_NB_IF:
 122                         format |= SI476X_DAUDIO_MODE_IF;
 123                         break;
 124                 default:
 125                         return -EINVAL;
 126                 }
 127                 break;
 128         default:
 129                 return -EINVAL;
 130         }
 131
 132         si476x_core_lock(core);
 133
 134         err = snd_soc_component_update_bits(codec_dai->component, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
 135                                   SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
 136                                   format);
 137
 138         si476x_core_unlock(core);
 139
 140         if (err < 0) {
 141                 dev_err(codec_dai->component->dev, "Failed to set output format\n");
 142                 return err;
 143         }
 144
 145         return 0;
 146 }
 147
 148 static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
 149                                   struct snd_pcm_hw_params *params,
 150                                   struct snd_soc_dai *dai)
 151 {
 152         struct si476x_core *core = i2c_mfd_cell_to_core(dai->dev);
 153         int rate, width, err;
 154
 155         rate = params_rate(params);
 156         if (rate < 32000 || rate > 48000) {
 157                 dev_err(dai->component->dev, "Rate: %d is not supported\n", rate);
 158                 return -EINVAL;
 159         }
 160
 161         switch (params_width(params)) {
 162         case 8:
 163                 width = SI476X_PCM_FORMAT_S8;
 164                 break;
 165         case 16:
 166                 width = SI476X_PCM_FORMAT_S16_LE;
 167                 break;
 168         case 20:
 169                 width = SI476X_PCM_FORMAT_S20_3LE;
 170                 break;
 171         case 24:
 172                 width = SI476X_PCM_FORMAT_S24_LE;
 173                 break;
 174         default:
 175                 return -EINVAL;
 176         }
 177
 178         si476x_core_lock(core);
 179
 180         err = snd_soc_component_write(dai->component, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE,
 181                             rate);
 182         if (err < 0) {
 183                 dev_err(dai->component->dev, "Failed to set sample rate\n");
 184                 goto out;
 185         }
 186
 187         err = snd_soc_component_update_bits(dai->component, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
 188                                   SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK,
 189                                   (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) |
 190                                   (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT));
 191         if (err < 0) {
 192                 dev_err(dai->component->dev, "Failed to set output width\n");
 193                 goto out;
 194         }
 195
 196 out:
 197         si476x_core_unlock(core);
 198
 199         return err;
 200 }
 201
 202 static const struct snd_soc_dai_ops si476x_dai_ops = {
 203         .hw_params      = si476x_codec_hw_params,
 204         .set_fmt        = si476x_codec_set_dai_fmt,
 205 };
 206
 207 static struct snd_soc_dai_driver si476x_dai = {
 208         .name           = "si476x-codec",
 209         .capture        = {
 210                 .stream_name    = "Capture",
 211                 .channels_min   = 2,
 212                 .channels_max   = 2,
 213
 214                 .rates = SNDRV_PCM_RATE_32000 |
 215                 SNDRV_PCM_RATE_44100 |
 216                 SNDRV_PCM_RATE_48000,
 217                 .formats = SNDRV_PCM_FMTBIT_S8 |
 218                 SNDRV_PCM_FMTBIT_S16_LE |
 219                 SNDRV_PCM_FMTBIT_S20_3LE |
 220                 SNDRV_PCM_FMTBIT_S24_LE
 221         },
 222         .ops            = &si476x_dai_ops,
 223 };
 224
 225 static int si476x_probe(struct snd_soc_component *component)
 226 {
 227         snd_soc_component_init_regmap(component,
 228                                 dev_get_regmap(component->dev->parent, NULL));
 229
 230         return 0;
 231 }
 232
 233 static const struct snd_soc_component_driver soc_component_dev_si476x = {
 234         .probe                  = si476x_probe,
 235         .dapm_widgets           = si476x_dapm_widgets,
 236         .num_dapm_widgets       = ARRAY_SIZE(si476x_dapm_widgets),
 237         .dapm_routes            = si476x_dapm_routes,
 238         .num_dapm_routes        = ARRAY_SIZE(si476x_dapm_routes),
 239         .idle_bias_on           = 1,
 240         .use_pmdown_time        = 1,
 241         .endianness             = 1,
 242         .non_legacy_dai_naming  = 1,
 243 };
 244
 245 static int si476x_platform_probe(struct platform_device *pdev)
 246 {
 247         return devm_snd_soc_register_component(&pdev->dev,
 248                                       &soc_component_dev_si476x,
 249                                       &si476x_dai, 1);
 250 }
 251
 252 MODULE_ALIAS("platform:si476x-codec");
 253
 254 static struct platform_driver si476x_platform_driver = {
 255         .driver         = {
 256                 .name   = "si476x-codec",
 257         },
 258         .probe          = si476x_platform_probe,
 259 };
 260 module_platform_driver(si476x_platform_driver);
 261
 262 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
 263 MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
 264 MODULE_LICENSE("GPL");