sound/soc/codecs/cs4341.c

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  *  Cirrus Logic CS4341A ALSA SoC Codec Driver
   4  *  Author: Alexander Shiyan <shc_work@mail.ru>
   5  */
   6
   7 #include <linux/i2c.h>
   8 #include <linux/module.h>
   9 #include <linux/of.h>
  10 #include <linux/regmap.h>
  11 #include <linux/spi/spi.h>
  12
  13 #include <sound/pcm.h>
  14 #include <sound/pcm_params.h>
  15 #include <sound/soc.h>
  16 #include <sound/tlv.h>
  17
  18 #define CS4341_REG_MODE1        0x00
  19 #define CS4341_REG_MODE2        0x01
  20 #define CS4341_REG_MIX          0x02
  21 #define CS4341_REG_VOLA         0x03
  22 #define CS4341_REG_VOLB         0x04
  23
  24 #define CS4341_MODE2_DIF        (7 << 4)
  25 #define CS4341_MODE2_DIF_I2S_24 (0 << 4)
  26 #define CS4341_MODE2_DIF_I2S_16 (1 << 4)
  27 #define CS4341_MODE2_DIF_LJ_24  (2 << 4)
  28 #define CS4341_MODE2_DIF_RJ_24  (3 << 4)
  29 #define CS4341_MODE2_DIF_RJ_16  (5 << 4)
  30 #define CS4341_VOLX_MUTE        (1 << 7)
  31
  32 struct cs4341_priv {
  33         unsigned int            fmt;
  34         struct regmap           *regmap;
  35         struct regmap_config    regcfg;
  36 };
  37
  38 static const struct reg_default cs4341_reg_defaults[] = {
  39         { CS4341_REG_MODE1,     0x00 },
  40         { CS4341_REG_MODE2,     0x82 },
  41         { CS4341_REG_MIX,       0x49 },
  42         { CS4341_REG_VOLA,      0x80 },
  43         { CS4341_REG_VOLB,      0x80 },
  44 };
  45
  46 static int cs4341_set_fmt(struct snd_soc_dai *dai, unsigned int format)
  47 {
  48         struct snd_soc_component *component = dai->component;
  49         struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
  50
  51         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
  52         case SND_SOC_DAIFMT_CBS_CFS:
  53                 break;
  54         default:
  55                 return -EINVAL;
  56         }
  57
  58         switch (format & SND_SOC_DAIFMT_INV_MASK) {
  59         case SND_SOC_DAIFMT_NB_NF:
  60                 break;
  61         default:
  62                 return -EINVAL;
  63         }
  64
  65         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
  66         case SND_SOC_DAIFMT_I2S:
  67         case SND_SOC_DAIFMT_LEFT_J:
  68         case SND_SOC_DAIFMT_RIGHT_J:
  69                 cs4341->fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
  70                 break;
  71         default:
  72                 return -EINVAL;
  73         }
  74
  75         return 0;
  76 }
  77
  78 static int cs4341_hw_params(struct snd_pcm_substream *substream,
  79                             struct snd_pcm_hw_params *params,
  80                             struct snd_soc_dai *dai)
  81 {
  82         struct snd_soc_component *component = dai->component;
  83         struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
  84         unsigned int mode = 0;
  85         int b24 = 0;
  86
  87         switch (params_format(params)) {
  88         case SNDRV_PCM_FORMAT_S24_LE:
  89                 b24 = 1;
  90                 break;
  91         case SNDRV_PCM_FORMAT_S16_LE:
  92                 break;
  93         default:
  94                 dev_err(component->dev, "Unsupported PCM format 0x%08x.\n",
  95                         params_format(params));
  96                 return -EINVAL;
  97         }
  98
  99         switch (cs4341->fmt) {
 100         case SND_SOC_DAIFMT_I2S:
 101                 mode = b24 ? CS4341_MODE2_DIF_I2S_24 : CS4341_MODE2_DIF_I2S_16;
 102                 break;
 103         case SND_SOC_DAIFMT_LEFT_J:
 104                 mode = CS4341_MODE2_DIF_LJ_24;
 105                 break;
 106         case SND_SOC_DAIFMT_RIGHT_J:
 107                 mode = b24 ? CS4341_MODE2_DIF_RJ_24 : CS4341_MODE2_DIF_RJ_16;
 108                 break;
 109         default:
 110                 dev_err(component->dev, "Unsupported DAI format 0x%08x.\n",
 111                         cs4341->fmt);
 112                 return -EINVAL;
 113         }
 114
 115         return snd_soc_component_update_bits(component, CS4341_REG_MODE2,
 116                                              CS4341_MODE2_DIF, mode);
 117 }
 118
 119 static int cs4341_digital_mute(struct snd_soc_dai *dai, int mute)
 120 {
 121         struct snd_soc_component *component = dai->component;
 122         int ret;
 123
 124         ret = snd_soc_component_update_bits(component, CS4341_REG_VOLA,
 125                                             CS4341_VOLX_MUTE,
 126                                             mute ? CS4341_VOLX_MUTE : 0);
 127         if (ret < 0)
 128                 return ret;
 129
 130         return snd_soc_component_update_bits(component, CS4341_REG_VOLB,
 131                                              CS4341_VOLX_MUTE,
 132                                              mute ? CS4341_VOLX_MUTE : 0);
 133 }
 134
 135 static DECLARE_TLV_DB_SCALE(out_tlv, -9000, 100, 0);
 136
 137 static const char * const deemph[] = {
 138         "None", "44.1k", "48k", "32k",
 139 };
 140
 141 static const struct soc_enum deemph_enum =
 142         SOC_ENUM_SINGLE(CS4341_REG_MODE2, 2, 4, deemph);
 143
 144 static const char * const srzc[] = {
 145         "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
 146 };
 147
 148 static const struct soc_enum srzc_enum =
 149         SOC_ENUM_SINGLE(CS4341_REG_MIX, 5, 4, srzc);
 150
 151
 152 static const struct snd_soc_dapm_widget cs4341_dapm_widgets[] = {
 153         SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
 154         SND_SOC_DAPM_OUTPUT("OutA"),
 155         SND_SOC_DAPM_OUTPUT("OutB"),
 156 };
 157
 158 static const struct snd_soc_dapm_route cs4341_routes[] = {
 159         { "OutA", NULL, "HiFi DAC" },
 160         { "OutB", NULL, "HiFi DAC" },
 161         { "DAC Playback", NULL, "OutA" },
 162         { "DAC Playback", NULL, "OutB" },
 163 };
 164
 165 static const struct snd_kcontrol_new cs4341_controls[] = {
 166         SOC_DOUBLE_R_TLV("Master Playback Volume",
 167                          CS4341_REG_VOLA, CS4341_REG_VOLB, 0, 90, 1, out_tlv),
 168         SOC_ENUM("De-Emphasis Control", deemph_enum),
 169         SOC_ENUM("Soft Ramp Zero Cross Control", srzc_enum),
 170         SOC_SINGLE("Auto-Mute Switch", CS4341_REG_MODE2, 7, 1, 0),
 171         SOC_SINGLE("Popguard Transient Switch", CS4341_REG_MODE2, 1, 1, 0),
 172 };
 173
 174 static const struct snd_soc_dai_ops cs4341_dai_ops = {
 175         .set_fmt        = cs4341_set_fmt,
 176         .hw_params      = cs4341_hw_params,
 177         .digital_mute   = cs4341_digital_mute,
 178 };
 179
 180 static struct snd_soc_dai_driver cs4341_dai = {
 181         .name                   = "cs4341a-hifi",
 182         .playback               = {
 183                 .stream_name    = "DAC Playback",
 184                 .channels_min   = 1,
 185                 .channels_max   = 2,
 186                 .rates          = SNDRV_PCM_RATE_8000_96000,
 187                 .formats        = SNDRV_PCM_FMTBIT_S16_LE |
 188                                   SNDRV_PCM_FMTBIT_S24_LE,
 189         },
 190         .ops                    = &cs4341_dai_ops,
 191         .symmetric_rates        = 1,
 192 };
 193
 194 static const struct snd_soc_component_driver soc_component_cs4341 = {
 195         .controls               = cs4341_controls,
 196         .num_controls           = ARRAY_SIZE(cs4341_controls),
 197         .dapm_widgets           = cs4341_dapm_widgets,
 198         .num_dapm_widgets       = ARRAY_SIZE(cs4341_dapm_widgets),
 199         .dapm_routes            = cs4341_routes,
 200         .num_dapm_routes        = ARRAY_SIZE(cs4341_routes),
 201         .idle_bias_on           = 1,
 202         .use_pmdown_time        = 1,
 203         .endianness             = 1,
 204         .non_legacy_dai_naming  = 1,
 205 };
 206
 207 static const struct of_device_id __maybe_unused cs4341_dt_ids[] = {
 208         { .compatible = "cirrus,cs4341a", },
 209         { }
 210 };
 211 MODULE_DEVICE_TABLE(of, cs4341_dt_ids);
 212
 213 static int cs4341_probe(struct device *dev)
 214 {
 215         struct cs4341_priv *cs4341 = dev_get_drvdata(dev);
 216         int i;
 217
 218         for (i = 0; i < ARRAY_SIZE(cs4341_reg_defaults); i++)
 219                 regmap_write(cs4341->regmap, cs4341_reg_defaults[i].reg,
 220                              cs4341_reg_defaults[i].def);
 221
 222         return devm_snd_soc_register_component(dev, &soc_component_cs4341,
 223                                                &cs4341_dai, 1);
 224 }
 225
 226 #if IS_ENABLED(CONFIG_I2C)
 227 static int cs4341_i2c_probe(struct i2c_client *i2c,
 228                             const struct i2c_device_id *id)
 229 {
 230         struct cs4341_priv *cs4341;
 231
 232         cs4341 = devm_kzalloc(&i2c->dev, sizeof(*cs4341), GFP_KERNEL);
 233         if (!cs4341)
 234                 return -ENOMEM;
 235
 236         i2c_set_clientdata(i2c, cs4341);
 237
 238         cs4341->regcfg.reg_bits         = 8;
 239         cs4341->regcfg.val_bits         = 8;
 240         cs4341->regcfg.max_register     = CS4341_REG_VOLB;
 241         cs4341->regcfg.cache_type       = REGCACHE_FLAT;
 242         cs4341->regcfg.reg_defaults     = cs4341_reg_defaults;
 243         cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults);
 244         cs4341->regmap = devm_regmap_init_i2c(i2c, &cs4341->regcfg);
 245         if (IS_ERR(cs4341->regmap))
 246                 return PTR_ERR(cs4341->regmap);
 247
 248         return cs4341_probe(&i2c->dev);
 249 }
 250
 251 static const struct i2c_device_id cs4341_i2c_id[] = {
 252         { "cs4341", 0 },
 253         { }
 254 };
 255 MODULE_DEVICE_TABLE(i2c, cs4341_i2c_id);
 256
 257 static struct i2c_driver cs4341_i2c_driver = {
 258         .driver = {
 259                 .name = "cs4341-i2c",
 260                 .of_match_table = of_match_ptr(cs4341_dt_ids),
 261         },
 262         .probe = cs4341_i2c_probe,
 263         .id_table = cs4341_i2c_id,
 264 };
 265 #endif
 266
 267 #if defined(CONFIG_SPI_MASTER)
 268 static bool cs4341_reg_readable(struct device *dev, unsigned int reg)
 269 {
 270         return false;
 271 }
 272
 273 static int cs4341_spi_probe(struct spi_device *spi)
 274 {
 275         struct cs4341_priv *cs4341;
 276         int ret;
 277
 278         cs4341 = devm_kzalloc(&spi->dev, sizeof(*cs4341), GFP_KERNEL);
 279         if (!cs4341)
 280                 return -ENOMEM;
 281
 282         if (!spi->bits_per_word)
 283                 spi->bits_per_word = 8;
 284         if (!spi->max_speed_hz)
 285                 spi->max_speed_hz = 6000000;
 286         ret = spi_setup(spi);
 287         if (ret)
 288                 return ret;
 289
 290         spi_set_drvdata(spi, cs4341);
 291
 292         cs4341->regcfg.reg_bits         = 16;
 293         cs4341->regcfg.val_bits         = 8;
 294         cs4341->regcfg.write_flag_mask  = 0x20;
 295         cs4341->regcfg.max_register     = CS4341_REG_VOLB;
 296         cs4341->regcfg.cache_type       = REGCACHE_FLAT;
 297         cs4341->regcfg.readable_reg     = cs4341_reg_readable;
 298         cs4341->regcfg.reg_defaults     = cs4341_reg_defaults;
 299         cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults);
 300         cs4341->regmap = devm_regmap_init_spi(spi, &cs4341->regcfg);
 301         if (IS_ERR(cs4341->regmap))
 302                 return PTR_ERR(cs4341->regmap);
 303
 304         return cs4341_probe(&spi->dev);
 305 }
 306
 307 static struct spi_driver cs4341_spi_driver = {
 308         .driver = {
 309                 .name = "cs4341-spi",
 310                 .of_match_table = of_match_ptr(cs4341_dt_ids),
 311         },
 312         .probe = cs4341_spi_probe,
 313 };
 314 #endif
 315
 316 static int __init cs4341_init(void)
 317 {
 318         int ret = 0;
 319
 320 #if IS_ENABLED(CONFIG_I2C)
 321         ret = i2c_add_driver(&cs4341_i2c_driver);
 322         if (ret)
 323                 return ret;
 324 #endif
 325 #if defined(CONFIG_SPI_MASTER)
 326         ret = spi_register_driver(&cs4341_spi_driver);
 327 #endif
 328
 329         return ret;
 330 }
 331 module_init(cs4341_init);
 332
 333 static void __exit cs4341_exit(void)
 334 {
 335 #if IS_ENABLED(CONFIG_I2C)
 336         i2c_del_driver(&cs4341_i2c_driver);
 337 #endif
 338 #if defined(CONFIG_SPI_MASTER)
 339         spi_unregister_driver(&cs4341_spi_driver);
 340 #endif
 341 }
 342 module_exit(cs4341_exit);
 343
 344 MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
 345 MODULE_DESCRIPTION("Cirrus Logic CS4341 ALSA SoC Codec Driver");
 346 MODULE_LICENSE("GPL");