sound/soc/codecs/wm8711.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * wm8711.c  --  WM8711 ALSA SoC Audio driver
   4  *
   5  * Copyright 2006 Wolfson Microelectronics
   6  *
   7  * Author: Mike Arthur <Mike.Arthur@wolfsonmicro.com>
   8  *
   9  * Based on wm8731.c by Richard Purdie
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/init.h>
  15 #include <linux/delay.h>
  16 #include <linux/pm.h>
  17 #include <linux/i2c.h>
  18 #include <linux/regmap.h>
  19 #include <linux/spi/spi.h>
  20 #include <linux/slab.h>
  21 #include <linux/of_device.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/tlv.h>
  27 #include <sound/initval.h>
  28
  29 #include "wm8711.h"
  30
  31 /* codec private data */
  32 struct wm8711_priv {
  33         struct regmap *regmap;
  34         unsigned int sysclk;
  35 };
  36
  37 /*
  38  * wm8711 register cache
  39  * We can't read the WM8711 register space when we are
  40  * using 2 wire for device control, so we cache them instead.
  41  * There is no point in caching the reset register
  42  */
  43 static const struct reg_default wm8711_reg_defaults[] = {
  44         { 0, 0x0079 }, { 1, 0x0079 }, { 2, 0x000a }, { 3, 0x0008 },
  45         { 4, 0x009f }, { 5, 0x000a }, { 6, 0x0000 }, { 7, 0x0000 },
  46 };
  47
  48 static bool wm8711_volatile(struct device *dev, unsigned int reg)
  49 {
  50         switch (reg) {
  51         case WM8711_RESET:
  52                 return true;
  53         default:
  54                 return false;
  55         }
  56 }
  57
  58 #define wm8711_reset(c) snd_soc_component_write(c, WM8711_RESET, 0)
  59
  60 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
  61
  62 static const struct snd_kcontrol_new wm8711_snd_controls[] = {
  63
  64 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
  65                  0, 127, 0, out_tlv),
  66 SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
  67         7, 1, 0),
  68
  69 };
  70
  71 /* Output Mixer */
  72 static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
  73 SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
  74 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
  75 };
  76
  77 static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
  78 SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
  79         &wm8711_output_mixer_controls[0],
  80         ARRAY_SIZE(wm8711_output_mixer_controls)),
  81 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
  82 SND_SOC_DAPM_OUTPUT("LOUT"),
  83 SND_SOC_DAPM_OUTPUT("LHPOUT"),
  84 SND_SOC_DAPM_OUTPUT("ROUT"),
  85 SND_SOC_DAPM_OUTPUT("RHPOUT"),
  86 };
  87
  88 static const struct snd_soc_dapm_route wm8711_intercon[] = {
  89         /* output mixer */
  90         {"Output Mixer", "Line Bypass Switch", "Line Input"},
  91         {"Output Mixer", "HiFi Playback Switch", "DAC"},
  92
  93         /* outputs */
  94         {"RHPOUT", NULL, "Output Mixer"},
  95         {"ROUT", NULL, "Output Mixer"},
  96         {"LHPOUT", NULL, "Output Mixer"},
  97         {"LOUT", NULL, "Output Mixer"},
  98 };
  99
 100 struct _coeff_div {
 101         u32 mclk;
 102         u32 rate;
 103         u16 fs;
 104         u8 sr:4;
 105         u8 bosr:1;
 106         u8 usb:1;
 107 };
 108
 109 /* codec mclk clock divider coefficients */
 110 static const struct _coeff_div coeff_div[] = {
 111         /* 48k */
 112         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 113         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 114         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 115
 116         /* 32k */
 117         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 118         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 119         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 120
 121         /* 8k */
 122         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 123         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 124         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 125         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 126         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 127
 128         /* 96k */
 129         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 130         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 131         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 132
 133         /* 44.1k */
 134         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 135         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 136         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 137
 138         /* 88.2k */
 139         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 140         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 141         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 142 };
 143
 144 static inline int get_coeff(int mclk, int rate)
 145 {
 146         int i;
 147
 148         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 149                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 150                         return i;
 151         }
 152         return 0;
 153 }
 154
 155 static int wm8711_hw_params(struct snd_pcm_substream *substream,
 156         struct snd_pcm_hw_params *params,
 157         struct snd_soc_dai *dai)
 158 {
 159         struct snd_soc_component *component = dai->component;
 160         struct wm8711_priv *wm8711 =  snd_soc_component_get_drvdata(component);
 161         u16 iface = snd_soc_component_read(component, WM8711_IFACE) & 0xfff3;
 162         int i = get_coeff(wm8711->sysclk, params_rate(params));
 163         u16 srate = (coeff_div[i].sr << 2) |
 164                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 165
 166         snd_soc_component_write(component, WM8711_SRATE, srate);
 167
 168         /* bit size */
 169         switch (params_width(params)) {
 170         case 16:
 171                 break;
 172         case 20:
 173                 iface |= 0x0004;
 174                 break;
 175         case 24:
 176                 iface |= 0x0008;
 177                 break;
 178         }
 179
 180         snd_soc_component_write(component, WM8711_IFACE, iface);
 181         return 0;
 182 }
 183
 184 static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
 185                               struct snd_soc_dai *dai)
 186 {
 187         struct snd_soc_component *component = dai->component;
 188
 189         /* set active */
 190         snd_soc_component_write(component, WM8711_ACTIVE, 0x0001);
 191
 192         return 0;
 193 }
 194
 195 static void wm8711_shutdown(struct snd_pcm_substream *substream,
 196                             struct snd_soc_dai *dai)
 197 {
 198         struct snd_soc_component *component = dai->component;
 199
 200         /* deactivate */
 201         if (!snd_soc_component_active(component)) {
 202                 udelay(50);
 203                 snd_soc_component_write(component, WM8711_ACTIVE, 0x0);
 204         }
 205 }
 206
 207 static int wm8711_mute(struct snd_soc_dai *dai, int mute, int direction)
 208 {
 209         struct snd_soc_component *component = dai->component;
 210         u16 mute_reg = snd_soc_component_read(component, WM8711_APDIGI) & 0xfff7;
 211
 212         if (mute)
 213                 snd_soc_component_write(component, WM8711_APDIGI, mute_reg | 0x8);
 214         else
 215                 snd_soc_component_write(component, WM8711_APDIGI, mute_reg);
 216
 217         return 0;
 218 }
 219
 220 static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 221                 int clk_id, unsigned int freq, int dir)
 222 {
 223         struct snd_soc_component *component = codec_dai->component;
 224         struct wm8711_priv *wm8711 =  snd_soc_component_get_drvdata(component);
 225
 226         switch (freq) {
 227         case 11289600:
 228         case 12000000:
 229         case 12288000:
 230         case 16934400:
 231         case 18432000:
 232                 wm8711->sysclk = freq;
 233                 return 0;
 234         }
 235         return -EINVAL;
 236 }
 237
 238 static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
 239                 unsigned int fmt)
 240 {
 241         struct snd_soc_component *component = codec_dai->component;
 242         u16 iface = snd_soc_component_read(component, WM8711_IFACE) & 0x000c;
 243
 244         /* set master/slave audio interface */
 245         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 246         case SND_SOC_DAIFMT_CBM_CFM:
 247                 iface |= 0x0040;
 248                 break;
 249         case SND_SOC_DAIFMT_CBS_CFS:
 250                 break;
 251         default:
 252                 return -EINVAL;
 253         }
 254
 255         /* interface format */
 256         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 257         case SND_SOC_DAIFMT_I2S:
 258                 iface |= 0x0002;
 259                 break;
 260         case SND_SOC_DAIFMT_RIGHT_J:
 261                 break;
 262         case SND_SOC_DAIFMT_LEFT_J:
 263                 iface |= 0x0001;
 264                 break;
 265         case SND_SOC_DAIFMT_DSP_A:
 266                 iface |= 0x0003;
 267                 break;
 268         case SND_SOC_DAIFMT_DSP_B:
 269                 iface |= 0x0013;
 270                 break;
 271         default:
 272                 return -EINVAL;
 273         }
 274
 275         /* clock inversion */
 276         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 277         case SND_SOC_DAIFMT_NB_NF:
 278                 break;
 279         case SND_SOC_DAIFMT_IB_IF:
 280                 iface |= 0x0090;
 281                 break;
 282         case SND_SOC_DAIFMT_IB_NF:
 283                 iface |= 0x0080;
 284                 break;
 285         case SND_SOC_DAIFMT_NB_IF:
 286                 iface |= 0x0010;
 287                 break;
 288         default:
 289                 return -EINVAL;
 290         }
 291
 292         /* set iface */
 293         snd_soc_component_write(component, WM8711_IFACE, iface);
 294         return 0;
 295 }
 296
 297 static int wm8711_set_bias_level(struct snd_soc_component *component,
 298         enum snd_soc_bias_level level)
 299 {
 300         struct wm8711_priv *wm8711 = snd_soc_component_get_drvdata(component);
 301         u16 reg = snd_soc_component_read(component, WM8711_PWR) & 0xff7f;
 302
 303         switch (level) {
 304         case SND_SOC_BIAS_ON:
 305                 snd_soc_component_write(component, WM8711_PWR, reg);
 306                 break;
 307         case SND_SOC_BIAS_PREPARE:
 308                 break;
 309         case SND_SOC_BIAS_STANDBY:
 310                 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
 311                         regcache_sync(wm8711->regmap);
 312
 313                 snd_soc_component_write(component, WM8711_PWR, reg | 0x0040);
 314                 break;
 315         case SND_SOC_BIAS_OFF:
 316                 snd_soc_component_write(component, WM8711_ACTIVE, 0x0);
 317                 snd_soc_component_write(component, WM8711_PWR, 0xffff);
 318                 break;
 319         }
 320         return 0;
 321 }
 322
 323 #define WM8711_RATES SNDRV_PCM_RATE_8000_96000
 324
 325 #define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 326         SNDRV_PCM_FMTBIT_S24_LE)
 327
 328 static const struct snd_soc_dai_ops wm8711_ops = {
 329         .prepare = wm8711_pcm_prepare,
 330         .hw_params = wm8711_hw_params,
 331         .shutdown = wm8711_shutdown,
 332         .mute_stream = wm8711_mute,
 333         .set_sysclk = wm8711_set_dai_sysclk,
 334         .set_fmt = wm8711_set_dai_fmt,
 335         .no_capture_mute = 1,
 336 };
 337
 338 static struct snd_soc_dai_driver wm8711_dai = {
 339         .name = "wm8711-hifi",
 340         .playback = {
 341                 .stream_name = "Playback",
 342                 .channels_min = 1,
 343                 .channels_max = 2,
 344                 .rates = WM8711_RATES,
 345                 .formats = WM8711_FORMATS,
 346         },
 347         .ops = &wm8711_ops,
 348 };
 349
 350 static int wm8711_probe(struct snd_soc_component *component)
 351 {
 352         int ret;
 353
 354         ret = wm8711_reset(component);
 355         if (ret < 0) {
 356                 dev_err(component->dev, "Failed to issue reset\n");
 357                 return ret;
 358         }
 359
 360         /* Latch the update bits */
 361         snd_soc_component_update_bits(component, WM8711_LOUT1V, 0x0100, 0x0100);
 362         snd_soc_component_update_bits(component, WM8711_ROUT1V, 0x0100, 0x0100);
 363
 364         return ret;
 365
 366 }
 367
 368 static const struct snd_soc_component_driver soc_component_dev_wm8711 = {
 369         .probe                  = wm8711_probe,
 370         .set_bias_level         = wm8711_set_bias_level,
 371         .controls               = wm8711_snd_controls,
 372         .num_controls           = ARRAY_SIZE(wm8711_snd_controls),
 373         .dapm_widgets           = wm8711_dapm_widgets,
 374         .num_dapm_widgets       = ARRAY_SIZE(wm8711_dapm_widgets),
 375         .dapm_routes            = wm8711_intercon,
 376         .num_dapm_routes        = ARRAY_SIZE(wm8711_intercon),
 377         .suspend_bias_off       = 1,
 378         .idle_bias_on           = 1,
 379         .use_pmdown_time        = 1,
 380         .endianness             = 1,
 381         .non_legacy_dai_naming  = 1,
 382 };
 383
 384 static const struct of_device_id wm8711_of_match[] = {
 385         { .compatible = "wlf,wm8711", },
 386         { }
 387 };
 388 MODULE_DEVICE_TABLE(of, wm8711_of_match);
 389
 390 static const struct regmap_config wm8711_regmap = {
 391         .reg_bits = 7,
 392         .val_bits = 9,
 393         .max_register = WM8711_RESET,
 394
 395         .reg_defaults = wm8711_reg_defaults,
 396         .num_reg_defaults = ARRAY_SIZE(wm8711_reg_defaults),
 397         .cache_type = REGCACHE_RBTREE,
 398
 399         .volatile_reg = wm8711_volatile,
 400 };
 401
 402 #if defined(CONFIG_SPI_MASTER)
 403 static int wm8711_spi_probe(struct spi_device *spi)
 404 {
 405         struct wm8711_priv *wm8711;
 406         int ret;
 407
 408         wm8711 = devm_kzalloc(&spi->dev, sizeof(struct wm8711_priv),
 409                               GFP_KERNEL);
 410         if (wm8711 == NULL)
 411                 return -ENOMEM;
 412
 413         wm8711->regmap = devm_regmap_init_spi(spi, &wm8711_regmap);
 414         if (IS_ERR(wm8711->regmap))
 415                 return PTR_ERR(wm8711->regmap);
 416
 417         spi_set_drvdata(spi, wm8711);
 418
 419         ret = devm_snd_soc_register_component(&spi->dev,
 420                         &soc_component_dev_wm8711, &wm8711_dai, 1);
 421
 422         return ret;
 423 }
 424
 425 static struct spi_driver wm8711_spi_driver = {
 426         .driver = {
 427                 .name   = "wm8711",
 428                 .of_match_table = wm8711_of_match,
 429         },
 430         .probe          = wm8711_spi_probe,
 431 };
 432 #endif /* CONFIG_SPI_MASTER */
 433
 434 #if IS_ENABLED(CONFIG_I2C)
 435 static int wm8711_i2c_probe(struct i2c_client *client,
 436                             const struct i2c_device_id *id)
 437 {
 438         struct wm8711_priv *wm8711;
 439         int ret;
 440
 441         wm8711 = devm_kzalloc(&client->dev, sizeof(struct wm8711_priv),
 442                               GFP_KERNEL);
 443         if (wm8711 == NULL)
 444                 return -ENOMEM;
 445
 446         wm8711->regmap = devm_regmap_init_i2c(client, &wm8711_regmap);
 447         if (IS_ERR(wm8711->regmap))
 448                 return PTR_ERR(wm8711->regmap);
 449
 450         i2c_set_clientdata(client, wm8711);
 451
 452         ret = devm_snd_soc_register_component(&client->dev,
 453                         &soc_component_dev_wm8711, &wm8711_dai, 1);
 454
 455         return ret;
 456 }
 457
 458 static const struct i2c_device_id wm8711_i2c_id[] = {
 459         { "wm8711", 0 },
 460         { }
 461 };
 462 MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);
 463
 464 static struct i2c_driver wm8711_i2c_driver = {
 465         .driver = {
 466                 .name = "wm8711",
 467                 .of_match_table = wm8711_of_match,
 468         },
 469         .probe =    wm8711_i2c_probe,
 470         .id_table = wm8711_i2c_id,
 471 };
 472 #endif
 473
 474 static int __init wm8711_modinit(void)
 475 {
 476         int ret;
 477 #if IS_ENABLED(CONFIG_I2C)
 478         ret = i2c_add_driver(&wm8711_i2c_driver);
 479         if (ret != 0) {
 480                 printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
 481                        ret);
 482         }
 483 #endif
 484 #if defined(CONFIG_SPI_MASTER)
 485         ret = spi_register_driver(&wm8711_spi_driver);
 486         if (ret != 0) {
 487                 printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
 488                        ret);
 489         }
 490 #endif
 491         return 0;
 492 }
 493 module_init(wm8711_modinit);
 494
 495 static void __exit wm8711_exit(void)
 496 {
 497 #if IS_ENABLED(CONFIG_I2C)
 498         i2c_del_driver(&wm8711_i2c_driver);
 499 #endif
 500 #if defined(CONFIG_SPI_MASTER)
 501         spi_unregister_driver(&wm8711_spi_driver);
 502 #endif
 503 }
 504 module_exit(wm8711_exit);
 505
 506 MODULE_DESCRIPTION("ASoC WM8711 driver");
 507 MODULE_AUTHOR("Mike Arthur");
 508 MODULE_LICENSE("GPL");