sound/soc/codecs/wm8728.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * wm8728.c  --  WM8728 ALSA SoC Audio driver
   4  *
   5  * Copyright 2008 Wolfson Microelectronics plc
   6  *
   7  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/moduleparam.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/pm.h>
  15 #include <linux/i2c.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/regmap.h>
  18 #include <linux/spi/spi.h>
  19 #include <linux/slab.h>
  20 #include <linux/of_device.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/soc.h>
  25 #include <sound/initval.h>
  26 #include <sound/tlv.h>
  27
  28 #include "wm8728.h"
  29
  30 /*
  31  * We can't read the WM8728 register space so we cache them instead.
  32  * Note that the defaults here aren't the physical defaults, we latch
  33  * the volume update bits, mute the output and enable infinite zero
  34  * detect.
  35  */
  36 static const struct reg_default wm8728_reg_defaults[] = {
  37         { 0, 0x1ff },
  38         { 1, 0x1ff },
  39         { 2, 0x001 },
  40         { 3, 0x100 },
  41 };
  42
  43 /* codec private data */
  44 struct wm8728_priv {
  45         struct regmap *regmap;
  46 };
  47
  48 static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
  49
  50 static const struct snd_kcontrol_new wm8728_snd_controls[] = {
  51
  52 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
  53                  0, 255, 0, wm8728_tlv),
  54
  55 SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
  56 };
  57
  58 /*
  59  * DAPM controls.
  60  */
  61 static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
  62 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
  63 SND_SOC_DAPM_OUTPUT("VOUTL"),
  64 SND_SOC_DAPM_OUTPUT("VOUTR"),
  65 };
  66
  67 static const struct snd_soc_dapm_route wm8728_intercon[] = {
  68         {"VOUTL", NULL, "DAC"},
  69         {"VOUTR", NULL, "DAC"},
  70 };
  71
  72 static int wm8728_mute(struct snd_soc_dai *dai, int mute)
  73 {
  74         struct snd_soc_component *component = dai->component;
  75         u16 mute_reg = snd_soc_component_read32(component, WM8728_DACCTL);
  76
  77         if (mute)
  78                 snd_soc_component_write(component, WM8728_DACCTL, mute_reg | 1);
  79         else
  80                 snd_soc_component_write(component, WM8728_DACCTL, mute_reg & ~1);
  81
  82         return 0;
  83 }
  84
  85 static int wm8728_hw_params(struct snd_pcm_substream *substream,
  86         struct snd_pcm_hw_params *params,
  87         struct snd_soc_dai *dai)
  88 {
  89         struct snd_soc_component *component = dai->component;
  90         u16 dac = snd_soc_component_read32(component, WM8728_DACCTL);
  91
  92         dac &= ~0x18;
  93
  94         switch (params_width(params)) {
  95         case 16:
  96                 break;
  97         case 20:
  98                 dac |= 0x10;
  99                 break;
 100         case 24:
 101                 dac |= 0x08;
 102                 break;
 103         default:
 104                 return -EINVAL;
 105         }
 106
 107         snd_soc_component_write(component, WM8728_DACCTL, dac);
 108
 109         return 0;
 110 }
 111
 112 static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
 113                 unsigned int fmt)
 114 {
 115         struct snd_soc_component *component = codec_dai->component;
 116         u16 iface = snd_soc_component_read32(component, WM8728_IFCTL);
 117
 118         /* Currently only I2S is supported by the driver, though the
 119          * hardware is more flexible.
 120          */
 121         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 122         case SND_SOC_DAIFMT_I2S:
 123                 iface |= 1;
 124                 break;
 125         default:
 126                 return -EINVAL;
 127         }
 128
 129         /* The hardware only support full slave mode */
 130         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 131         case SND_SOC_DAIFMT_CBS_CFS:
 132                 break;
 133         default:
 134                 return -EINVAL;
 135         }
 136
 137         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 138         case SND_SOC_DAIFMT_NB_NF:
 139                 iface &= ~0x22;
 140                 break;
 141         case SND_SOC_DAIFMT_IB_NF:
 142                 iface |=  0x20;
 143                 iface &= ~0x02;
 144                 break;
 145         case SND_SOC_DAIFMT_NB_IF:
 146                 iface |= 0x02;
 147                 iface &= ~0x20;
 148                 break;
 149         case SND_SOC_DAIFMT_IB_IF:
 150                 iface |= 0x22;
 151                 break;
 152         default:
 153                 return -EINVAL;
 154         }
 155
 156         snd_soc_component_write(component, WM8728_IFCTL, iface);
 157         return 0;
 158 }
 159
 160 static int wm8728_set_bias_level(struct snd_soc_component *component,
 161                                  enum snd_soc_bias_level level)
 162 {
 163         struct wm8728_priv *wm8728 = snd_soc_component_get_drvdata(component);
 164         u16 reg;
 165
 166         switch (level) {
 167         case SND_SOC_BIAS_ON:
 168         case SND_SOC_BIAS_PREPARE:
 169         case SND_SOC_BIAS_STANDBY:
 170                 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
 171                         /* Power everything up... */
 172                         reg = snd_soc_component_read32(component, WM8728_DACCTL);
 173                         snd_soc_component_write(component, WM8728_DACCTL, reg & ~0x4);
 174
 175                         /* ..then sync in the register cache. */
 176                         regcache_sync(wm8728->regmap);
 177                 }
 178                 break;
 179
 180         case SND_SOC_BIAS_OFF:
 181                 reg = snd_soc_component_read32(component, WM8728_DACCTL);
 182                 snd_soc_component_write(component, WM8728_DACCTL, reg | 0x4);
 183                 break;
 184         }
 185         return 0;
 186 }
 187
 188 #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
 189
 190 #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 191         SNDRV_PCM_FMTBIT_S24_LE)
 192
 193 static const struct snd_soc_dai_ops wm8728_dai_ops = {
 194         .hw_params      = wm8728_hw_params,
 195         .digital_mute   = wm8728_mute,
 196         .set_fmt        = wm8728_set_dai_fmt,
 197 };
 198
 199 static struct snd_soc_dai_driver wm8728_dai = {
 200         .name = "wm8728-hifi",
 201         .playback = {
 202                 .stream_name = "Playback",
 203                 .channels_min = 2,
 204                 .channels_max = 2,
 205                 .rates = WM8728_RATES,
 206                 .formats = WM8728_FORMATS,
 207         },
 208         .ops = &wm8728_dai_ops,
 209 };
 210
 211 static const struct snd_soc_component_driver soc_component_dev_wm8728 = {
 212         .set_bias_level         = wm8728_set_bias_level,
 213         .controls               = wm8728_snd_controls,
 214         .num_controls           = ARRAY_SIZE(wm8728_snd_controls),
 215         .dapm_widgets           = wm8728_dapm_widgets,
 216         .num_dapm_widgets       = ARRAY_SIZE(wm8728_dapm_widgets),
 217         .dapm_routes            = wm8728_intercon,
 218         .num_dapm_routes        = ARRAY_SIZE(wm8728_intercon),
 219         .suspend_bias_off       = 1,
 220         .idle_bias_on           = 1,
 221         .use_pmdown_time        = 1,
 222         .endianness             = 1,
 223         .non_legacy_dai_naming  = 1,
 224 };
 225
 226 static const struct of_device_id wm8728_of_match[] = {
 227         { .compatible = "wlf,wm8728", },
 228         { }
 229 };
 230 MODULE_DEVICE_TABLE(of, wm8728_of_match);
 231
 232 static const struct regmap_config wm8728_regmap = {
 233         .reg_bits = 7,
 234         .val_bits = 9,
 235         .max_register = WM8728_IFCTL,
 236
 237         .reg_defaults = wm8728_reg_defaults,
 238         .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults),
 239         .cache_type = REGCACHE_RBTREE,
 240 };
 241
 242 #if defined(CONFIG_SPI_MASTER)
 243 static int wm8728_spi_probe(struct spi_device *spi)
 244 {
 245         struct wm8728_priv *wm8728;
 246         int ret;
 247
 248         wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv),
 249                               GFP_KERNEL);
 250         if (wm8728 == NULL)
 251                 return -ENOMEM;
 252
 253         wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap);
 254         if (IS_ERR(wm8728->regmap))
 255                 return PTR_ERR(wm8728->regmap);
 256
 257         spi_set_drvdata(spi, wm8728);
 258
 259         ret = devm_snd_soc_register_component(&spi->dev,
 260                         &soc_component_dev_wm8728, &wm8728_dai, 1);
 261
 262         return ret;
 263 }
 264
 265 static struct spi_driver wm8728_spi_driver = {
 266         .driver = {
 267                 .name   = "wm8728",
 268                 .of_match_table = wm8728_of_match,
 269         },
 270         .probe          = wm8728_spi_probe,
 271 };
 272 #endif /* CONFIG_SPI_MASTER */
 273
 274 #if IS_ENABLED(CONFIG_I2C)
 275 static int wm8728_i2c_probe(struct i2c_client *i2c,
 276                             const struct i2c_device_id *id)
 277 {
 278         struct wm8728_priv *wm8728;
 279         int ret;
 280
 281         wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv),
 282                               GFP_KERNEL);
 283         if (wm8728 == NULL)
 284                 return -ENOMEM;
 285
 286         wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap);
 287         if (IS_ERR(wm8728->regmap))
 288                 return PTR_ERR(wm8728->regmap);
 289
 290         i2c_set_clientdata(i2c, wm8728);
 291
 292         ret =  devm_snd_soc_register_component(&i2c->dev,
 293                         &soc_component_dev_wm8728, &wm8728_dai, 1);
 294
 295         return ret;
 296 }
 297
 298 static const struct i2c_device_id wm8728_i2c_id[] = {
 299         { "wm8728", 0 },
 300         { }
 301 };
 302 MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
 303
 304 static struct i2c_driver wm8728_i2c_driver = {
 305         .driver = {
 306                 .name = "wm8728",
 307                 .of_match_table = wm8728_of_match,
 308         },
 309         .probe =    wm8728_i2c_probe,
 310         .id_table = wm8728_i2c_id,
 311 };
 312 #endif
 313
 314 static int __init wm8728_modinit(void)
 315 {
 316         int ret = 0;
 317 #if IS_ENABLED(CONFIG_I2C)
 318         ret = i2c_add_driver(&wm8728_i2c_driver);
 319         if (ret != 0) {
 320                 printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
 321                        ret);
 322         }
 323 #endif
 324 #if defined(CONFIG_SPI_MASTER)
 325         ret = spi_register_driver(&wm8728_spi_driver);
 326         if (ret != 0) {
 327                 printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
 328                        ret);
 329         }
 330 #endif
 331         return ret;
 332 }
 333 module_init(wm8728_modinit);
 334
 335 static void __exit wm8728_exit(void)
 336 {
 337 #if IS_ENABLED(CONFIG_I2C)
 338         i2c_del_driver(&wm8728_i2c_driver);
 339 #endif
 340 #if defined(CONFIG_SPI_MASTER)
 341         spi_unregister_driver(&wm8728_spi_driver);
 342 #endif
 343 }
 344 module_exit(wm8728_exit);
 345
 346 MODULE_DESCRIPTION("ASoC WM8728 driver");
 347 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 348 MODULE_LICENSE("GPL");