sound/soc/codecs/cs4349.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * cs4349.c  --  CS4349 ALSA Soc Audio driver
   4  *
   5  * Copyright 2015 Cirrus Logic, Inc.
   6  *
   7  * Authors: Tim Howe <Tim.Howe@cirrus.com>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/moduleparam.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/delay.h>
  15 #include <linux/gpio.h>
  16 #include <linux/gpio/consumer.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/pm.h>
  19 #include <linux/i2c.h>
  20 #include <linux/of_device.h>
  21 #include <linux/regmap.h>
  22 #include <linux/slab.h>
  23 #include <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/soc-dapm.h>
  28 #include <sound/initval.h>
  29 #include <sound/tlv.h>
  30 #include "cs4349.h"
  31
  32
  33 static const struct reg_default cs4349_reg_defaults[] = {
  34         { 2, 0x00 },    /* r02  - Mode Control */
  35         { 3, 0x09 },    /* r03  - Volume, Mixing and Inversion Control */
  36         { 4, 0x81 },    /* r04  - Mute Control */
  37         { 5, 0x00 },    /* r05  - Channel A Volume Control */
  38         { 6, 0x00 },    /* r06  - Channel B Volume Control */
  39         { 7, 0xB1 },    /* r07  - Ramp and Filter Control */
  40         { 8, 0x1C },    /* r08  - Misc. Control */
  41 };
  42
  43 /* Private data for the CS4349 */
  44 struct  cs4349_private {
  45         struct regmap                   *regmap;
  46         struct gpio_desc                *reset_gpio;
  47         unsigned int                    mode;
  48         int                             rate;
  49 };
  50
  51 static bool cs4349_readable_register(struct device *dev, unsigned int reg)
  52 {
  53         switch (reg) {
  54         case CS4349_CHIPID ... CS4349_MISC:
  55                 return true;
  56         default:
  57                 return false;
  58         }
  59 }
  60
  61 static bool cs4349_writeable_register(struct device *dev, unsigned int reg)
  62 {
  63         switch (reg) {
  64         case CS4349_MODE ...  CS4349_MISC:
  65                 return true;
  66         default:
  67                 return false;
  68         }
  69 }
  70
  71 static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai,
  72                               unsigned int format)
  73 {
  74         struct snd_soc_component *component = codec_dai->component;
  75         struct cs4349_private *cs4349 = snd_soc_component_get_drvdata(component);
  76         unsigned int fmt;
  77
  78         fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
  79
  80         switch (fmt) {
  81         case SND_SOC_DAIFMT_I2S:
  82         case SND_SOC_DAIFMT_LEFT_J:
  83         case SND_SOC_DAIFMT_RIGHT_J:
  84                 cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
  85                 break;
  86         default:
  87                 return -EINVAL;
  88         }
  89
  90         return 0;
  91 }
  92
  93 static int cs4349_pcm_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 cs4349_private *cs4349 = snd_soc_component_get_drvdata(component);
  99         int fmt, ret;
 100
 101         cs4349->rate = params_rate(params);
 102
 103         switch (cs4349->mode) {
 104         case SND_SOC_DAIFMT_I2S:
 105                 fmt = DIF_I2S;
 106                 break;
 107         case SND_SOC_DAIFMT_LEFT_J:
 108                 fmt = DIF_LEFT_JST;
 109                 break;
 110         case SND_SOC_DAIFMT_RIGHT_J:
 111                 switch (params_width(params)) {
 112                 case 16:
 113                         fmt = DIF_RGHT_JST16;
 114                         break;
 115                 case 24:
 116                         fmt = DIF_RGHT_JST24;
 117                         break;
 118                 default:
 119                         return -EINVAL;
 120                 }
 121                 break;
 122         default:
 123                 return -EINVAL;
 124         }
 125
 126         ret = snd_soc_component_update_bits(component, CS4349_MODE, DIF_MASK,
 127                                   MODE_FORMAT(fmt));
 128         if (ret < 0)
 129                 return ret;
 130
 131         return 0;
 132 }
 133
 134 static int cs4349_digital_mute(struct snd_soc_dai *dai, int mute)
 135 {
 136         struct snd_soc_component *component = dai->component;
 137         int reg;
 138
 139         reg = 0;
 140         if (mute)
 141                 reg = MUTE_AB_MASK;
 142
 143         return snd_soc_component_update_bits(component, CS4349_MUTE, MUTE_AB_MASK, reg);
 144 }
 145
 146 static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0);
 147
 148 static const char * const chan_mix_texts[] = {
 149         "Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB",
 150         "BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL",
 151         "MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono",
 152         /*Normal == Channel A = Left, Channel B = Right*/
 153 };
 154
 155 static const char * const fm_texts[] = {
 156         "Auto", "Single", "Double", "Quad",
 157 };
 158
 159 static const char * const deemph_texts[] = {
 160         "None", "44.1k", "48k", "32k",
 161 };
 162
 163 static const char * const softr_zeroc_texts[] = {
 164         "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
 165 };
 166
 167 static int deemph_values[] = {
 168         0, 4, 8, 12,
 169 };
 170
 171 static int softr_zeroc_values[] = {
 172         0, 64, 128, 192,
 173 };
 174
 175 static const struct soc_enum chan_mix_enum =
 176         SOC_ENUM_SINGLE(CS4349_VMI, 0,
 177                         ARRAY_SIZE(chan_mix_texts),
 178                         chan_mix_texts);
 179
 180 static const struct soc_enum fm_mode_enum =
 181         SOC_ENUM_SINGLE(CS4349_MODE, 0,
 182                         ARRAY_SIZE(fm_texts),
 183                         fm_texts);
 184
 185 static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK,
 186                                 deemph_texts, deemph_values);
 187
 188 static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0,
 189                                 SR_ZC_MASK, softr_zeroc_texts,
 190                                 softr_zeroc_values);
 191
 192 static const struct snd_kcontrol_new cs4349_snd_controls[] = {
 193         SOC_DOUBLE_R_TLV("Master Playback Volume",
 194                          CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv),
 195         SOC_ENUM("Functional Mode", fm_mode_enum),
 196         SOC_ENUM("De-Emphasis Control", deemph_enum),
 197         SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum),
 198         SOC_ENUM("Channel Mixer", chan_mix_enum),
 199         SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0),
 200         SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0),
 201         SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0),
 202         SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0),
 203         SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0),
 204         SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0),
 205         SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0),
 206         SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0),
 207         SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0),
 208         SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0),
 209 };
 210
 211 static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = {
 212         SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
 213
 214         SND_SOC_DAPM_OUTPUT("OutputA"),
 215         SND_SOC_DAPM_OUTPUT("OutputB"),
 216 };
 217
 218 static const struct snd_soc_dapm_route cs4349_routes[] = {
 219         {"DAC Playback", NULL, "OutputA"},
 220         {"DAC Playback", NULL, "OutputB"},
 221
 222         {"OutputA", NULL, "HiFi DAC"},
 223         {"OutputB", NULL, "HiFi DAC"},
 224 };
 225
 226 #define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8  | \
 227                         SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S16_BE  | \
 228                         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
 229                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
 230                         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \
 231                         SNDRV_PCM_FMTBIT_S24_LE  | SNDRV_PCM_FMTBIT_S24_BE  | \
 232                         SNDRV_PCM_FMTBIT_S32_LE)
 233
 234 #define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000
 235
 236 static const struct snd_soc_dai_ops cs4349_dai_ops = {
 237         .hw_params      = cs4349_pcm_hw_params,
 238         .set_fmt        = cs4349_set_dai_fmt,
 239         .digital_mute   = cs4349_digital_mute,
 240 };
 241
 242 static struct snd_soc_dai_driver cs4349_dai = {
 243         .name = "cs4349_hifi",
 244         .playback = {
 245                 .stream_name    = "DAC Playback",
 246                 .channels_min   = 1,
 247                 .channels_max   = 2,
 248                 .rates          = CS4349_PCM_RATES,
 249                 .formats        = CS4349_PCM_FORMATS,
 250         },
 251         .ops = &cs4349_dai_ops,
 252         .symmetric_rates = 1,
 253 };
 254
 255 static const struct snd_soc_component_driver soc_component_dev_cs4349 = {
 256         .controls               = cs4349_snd_controls,
 257         .num_controls           = ARRAY_SIZE(cs4349_snd_controls),
 258         .dapm_widgets           = cs4349_dapm_widgets,
 259         .num_dapm_widgets       = ARRAY_SIZE(cs4349_dapm_widgets),
 260         .dapm_routes            = cs4349_routes,
 261         .num_dapm_routes        = ARRAY_SIZE(cs4349_routes),
 262         .idle_bias_on           = 1,
 263         .use_pmdown_time        = 1,
 264         .endianness             = 1,
 265         .non_legacy_dai_naming  = 1,
 266 };
 267
 268 static const struct regmap_config cs4349_regmap = {
 269         .reg_bits               = 8,
 270         .val_bits               = 8,
 271
 272         .max_register           = CS4349_MISC,
 273         .reg_defaults           = cs4349_reg_defaults,
 274         .num_reg_defaults       = ARRAY_SIZE(cs4349_reg_defaults),
 275         .readable_reg           = cs4349_readable_register,
 276         .writeable_reg          = cs4349_writeable_register,
 277         .cache_type             = REGCACHE_RBTREE,
 278 };
 279
 280 static int cs4349_i2c_probe(struct i2c_client *client,
 281                                       const struct i2c_device_id *id)
 282 {
 283         struct cs4349_private *cs4349;
 284         int ret;
 285
 286         cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL);
 287         if (!cs4349)
 288                 return -ENOMEM;
 289
 290         cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap);
 291         if (IS_ERR(cs4349->regmap)) {
 292                 ret = PTR_ERR(cs4349->regmap);
 293                 dev_err(&client->dev, "regmap_init() failed: %d\n", ret);
 294                 return ret;
 295         }
 296
 297         /* Reset the Device */
 298         cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev,
 299                 "reset", GPIOD_OUT_LOW);
 300         if (IS_ERR(cs4349->reset_gpio))
 301                 return PTR_ERR(cs4349->reset_gpio);
 302
 303         gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
 304
 305         i2c_set_clientdata(client, cs4349);
 306
 307         return devm_snd_soc_register_component(&client->dev,
 308                 &soc_component_dev_cs4349,
 309                 &cs4349_dai, 1);
 310 }
 311
 312 static int cs4349_i2c_remove(struct i2c_client *client)
 313 {
 314         struct cs4349_private *cs4349 = i2c_get_clientdata(client);
 315
 316         /* Hold down reset */
 317         gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
 318
 319         return 0;
 320 }
 321
 322 #ifdef CONFIG_PM
 323 static int cs4349_runtime_suspend(struct device *dev)
 324 {
 325         struct cs4349_private *cs4349 = dev_get_drvdata(dev);
 326         int ret;
 327
 328         ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, PWR_DWN);
 329         if (ret < 0)
 330                 return ret;
 331
 332         regcache_cache_only(cs4349->regmap, true);
 333
 334         /* Hold down reset */
 335         gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
 336
 337         return 0;
 338 }
 339
 340 static int cs4349_runtime_resume(struct device *dev)
 341 {
 342         struct cs4349_private *cs4349 = dev_get_drvdata(dev);
 343         int ret;
 344
 345         ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0);
 346         if (ret < 0)
 347                 return ret;
 348
 349         gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
 350
 351         regcache_cache_only(cs4349->regmap, false);
 352         regcache_sync(cs4349->regmap);
 353
 354         return 0;
 355 }
 356 #endif
 357
 358 static const struct dev_pm_ops cs4349_runtime_pm = {
 359         SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume,
 360                            NULL)
 361 };
 362
 363 static const struct of_device_id cs4349_of_match[] = {
 364         { .compatible = "cirrus,cs4349", },
 365         {},
 366 };
 367
 368 MODULE_DEVICE_TABLE(of, cs4349_of_match);
 369
 370 static const struct i2c_device_id cs4349_i2c_id[] = {
 371         {"cs4349", 0},
 372         {}
 373 };
 374
 375 MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id);
 376
 377 static struct i2c_driver cs4349_i2c_driver = {
 378         .driver = {
 379                 .name           = "cs4349",
 380                 .of_match_table = cs4349_of_match,
 381                 .pm = &cs4349_runtime_pm,
 382         },
 383         .id_table       = cs4349_i2c_id,
 384         .probe          = cs4349_i2c_probe,
 385         .remove         = cs4349_i2c_remove,
 386 };
 387
 388 module_i2c_driver(cs4349_i2c_driver);
 389
 390 MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>");
 391 MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver");
 392 MODULE_LICENSE("GPL");