sound/soc/codecs/pcm179x.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * PCM179X ASoC codec driver
   4  *
   5  * Copyright (c) Amarula Solutions B.V. 2013
   6  *
   7  *     Michael Trimarchi <michael@amarulasolutions.com>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/slab.h>
  12 #include <linux/kernel.h>
  13 #include <linux/device.h>
  14
  15 #include <sound/core.h>
  16 #include <sound/pcm.h>
  17 #include <sound/pcm_params.h>
  18 #include <sound/initval.h>
  19 #include <sound/soc.h>
  20 #include <sound/tlv.h>
  21 #include <linux/of.h>
  22
  23 #include "pcm179x.h"
  24
  25 #define PCM179X_DAC_VOL_LEFT    0x10
  26 #define PCM179X_DAC_VOL_RIGHT   0x11
  27 #define PCM179X_FMT_CONTROL     0x12
  28 #define PCM179X_MODE_CONTROL    0x13
  29 #define PCM179X_SOFT_MUTE       PCM179X_FMT_CONTROL
  30
  31 #define PCM179X_FMT_MASK        0x70
  32 #define PCM179X_FMT_SHIFT       4
  33 #define PCM179X_MUTE_MASK       0x01
  34 #define PCM179X_MUTE_SHIFT      0
  35 #define PCM179X_ATLD_ENABLE     (1 << 7)
  36
  37 static const struct reg_default pcm179x_reg_defaults[] = {
  38         { 0x10, 0xff },
  39         { 0x11, 0xff },
  40         { 0x12, 0x50 },
  41         { 0x13, 0x00 },
  42         { 0x14, 0x00 },
  43         { 0x15, 0x01 },
  44         { 0x16, 0x00 },
  45         { 0x17, 0x00 },
  46 };
  47
  48 static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
  49 {
  50         return reg >= 0x10 && reg <= 0x17;
  51 }
  52
  53 static bool pcm179x_writeable_reg(struct device *dev, unsigned int reg)
  54 {
  55         bool accessible;
  56
  57         accessible = pcm179x_accessible_reg(dev, reg);
  58
  59         return accessible && reg != 0x16 && reg != 0x17;
  60 }
  61
  62 struct pcm179x_private {
  63         struct regmap *regmap;
  64         unsigned int format;
  65         unsigned int rate;
  66 };
  67
  68 static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
  69                              unsigned int format)
  70 {
  71         struct snd_soc_component *component = codec_dai->component;
  72         struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
  73
  74         priv->format = format;
  75
  76         return 0;
  77 }
  78
  79 static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute)
  80 {
  81         struct snd_soc_component *component = dai->component;
  82         struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
  83         int ret;
  84
  85         ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
  86                                  PCM179X_MUTE_MASK, !!mute);
  87         if (ret < 0)
  88                 return ret;
  89
  90         return 0;
  91 }
  92
  93 static int pcm179x_hw_params(struct snd_pcm_substream *substream,
  94                              struct snd_pcm_hw_params *params,
  95                              struct snd_soc_dai *dai)
  96 {
  97         struct snd_soc_component *component = dai->component;
  98         struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
  99         int val = 0, ret;
 100
 101         priv->rate = params_rate(params);
 102
 103         switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
 104         case SND_SOC_DAIFMT_RIGHT_J:
 105                 switch (params_width(params)) {
 106                 case 24:
 107                 case 32:
 108                         val = 2;
 109                         break;
 110                 case 16:
 111                         val = 0;
 112                         break;
 113                 default:
 114                         return -EINVAL;
 115                 }
 116                 break;
 117         case SND_SOC_DAIFMT_I2S:
 118                 switch (params_width(params)) {
 119                 case 24:
 120                 case 32:
 121                         val = 5;
 122                         break;
 123                 case 16:
 124                         val = 4;
 125                         break;
 126                 default:
 127                         return -EINVAL;
 128                 }
 129                 break;
 130         default:
 131                 dev_err(component->dev, "Invalid DAI format\n");
 132                 return -EINVAL;
 133         }
 134
 135         val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE;
 136
 137         ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
 138                                  PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val);
 139         if (ret < 0)
 140                 return ret;
 141
 142         return 0;
 143 }
 144
 145 static const struct snd_soc_dai_ops pcm179x_dai_ops = {
 146         .set_fmt        = pcm179x_set_dai_fmt,
 147         .hw_params      = pcm179x_hw_params,
 148         .digital_mute   = pcm179x_digital_mute,
 149 };
 150
 151 static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
 152
 153 static const struct snd_kcontrol_new pcm179x_controls[] = {
 154         SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
 155                          PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
 156                          pcm179x_dac_tlv),
 157         SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
 158         SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
 159 };
 160
 161 static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
 162 SND_SOC_DAPM_OUTPUT("IOUTL+"),
 163 SND_SOC_DAPM_OUTPUT("IOUTL-"),
 164 SND_SOC_DAPM_OUTPUT("IOUTR+"),
 165 SND_SOC_DAPM_OUTPUT("IOUTR-"),
 166 };
 167
 168 static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = {
 169         { "IOUTL+", NULL, "Playback" },
 170         { "IOUTL-", NULL, "Playback" },
 171         { "IOUTR+", NULL, "Playback" },
 172         { "IOUTR-", NULL, "Playback" },
 173 };
 174
 175 static struct snd_soc_dai_driver pcm179x_dai = {
 176         .name = "pcm179x-hifi",
 177         .playback = {
 178                 .stream_name = "Playback",
 179                 .channels_min = 2,
 180                 .channels_max = 2,
 181                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
 182                 .rate_min = 10000,
 183                 .rate_max = 200000,
 184                 .formats = PCM1792A_FORMATS, },
 185         .ops = &pcm179x_dai_ops,
 186 };
 187
 188 const struct regmap_config pcm179x_regmap_config = {
 189         .reg_bits               = 8,
 190         .val_bits               = 8,
 191         .max_register           = 23,
 192         .reg_defaults           = pcm179x_reg_defaults,
 193         .num_reg_defaults       = ARRAY_SIZE(pcm179x_reg_defaults),
 194         .writeable_reg          = pcm179x_writeable_reg,
 195         .readable_reg           = pcm179x_accessible_reg,
 196 };
 197 EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
 198
 199 static const struct snd_soc_component_driver soc_component_dev_pcm179x = {
 200         .controls               = pcm179x_controls,
 201         .num_controls           = ARRAY_SIZE(pcm179x_controls),
 202         .dapm_widgets           = pcm179x_dapm_widgets,
 203         .num_dapm_widgets       = ARRAY_SIZE(pcm179x_dapm_widgets),
 204         .dapm_routes            = pcm179x_dapm_routes,
 205         .num_dapm_routes        = ARRAY_SIZE(pcm179x_dapm_routes),
 206         .idle_bias_on           = 1,
 207         .use_pmdown_time        = 1,
 208         .endianness             = 1,
 209         .non_legacy_dai_naming  = 1,
 210 };
 211
 212 int pcm179x_common_init(struct device *dev, struct regmap *regmap)
 213 {
 214         struct pcm179x_private *pcm179x;
 215
 216         pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
 217                                 GFP_KERNEL);
 218         if (!pcm179x)
 219                 return -ENOMEM;
 220
 221         pcm179x->regmap = regmap;
 222         dev_set_drvdata(dev, pcm179x);
 223
 224         return devm_snd_soc_register_component(dev,
 225                         &soc_component_dev_pcm179x, &pcm179x_dai, 1);
 226 }
 227 EXPORT_SYMBOL_GPL(pcm179x_common_init);
 228
 229 MODULE_DESCRIPTION("ASoC PCM179X driver");
 230 MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
 231 MODULE_LICENSE("GPL");