sound/soc/codecs/max9850.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * max9850.c  --  codec driver for max9850
   4  *
   5  * Copyright (C) 2011 taskit GmbH
   6  *
   7  * Author: Christian Glindkamp <christian.glindkamp@taskit.de>
   8  *
   9  * Initial development of this code was funded by
  10  * MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/i2c.h>
  16 #include <linux/regmap.h>
  17 #include <linux/slab.h>
  18 #include <sound/pcm.h>
  19 #include <sound/pcm_params.h>
  20 #include <sound/soc.h>
  21 #include <sound/tlv.h>
  22
  23 #include "max9850.h"
  24
  25 struct max9850_priv {
  26         struct regmap *regmap;
  27         unsigned int sysclk;
  28 };
  29
  30 /* max9850 register cache */
  31 static const struct reg_default max9850_reg[] = {
  32         {  2, 0x0c },
  33         {  3, 0x00 },
  34         {  4, 0x00 },
  35         {  5, 0x00 },
  36         {  6, 0x00 },
  37         {  7, 0x00 },
  38         {  8, 0x00 },
  39         {  9, 0x00 },
  40         { 10, 0x00 },
  41 };
  42
  43 /* these registers are not used at the moment but provided for the sake of
  44  * completeness */
  45 static bool max9850_volatile_register(struct device *dev, unsigned int reg)
  46 {
  47         switch (reg) {
  48         case MAX9850_STATUSA:
  49         case MAX9850_STATUSB:
  50                 return true;
  51         default:
  52                 return false;
  53         }
  54 }
  55
  56 static const struct regmap_config max9850_regmap = {
  57         .reg_bits = 8,
  58         .val_bits = 8,
  59
  60         .max_register = MAX9850_DIGITAL_AUDIO,
  61         .volatile_reg = max9850_volatile_register,
  62         .cache_type = REGCACHE_RBTREE,
  63 };
  64
  65 static const DECLARE_TLV_DB_RANGE(max9850_tlv,
  66         0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
  67         0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
  68         0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
  69         0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0)
  70 );
  71
  72 static const struct snd_kcontrol_new max9850_controls[] = {
  73 SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
  74 SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
  75 SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
  76 };
  77
  78 static const struct snd_kcontrol_new max9850_mixer_controls[] = {
  79         SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
  80 };
  81
  82 static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
  83 SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
  84 SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
  85 SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
  86 SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
  87 SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
  88                 &max9850_mixer_controls[0],
  89                 ARRAY_SIZE(max9850_mixer_controls)),
  90 SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
  91 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
  92 SND_SOC_DAPM_OUTPUT("OUTL"),
  93 SND_SOC_DAPM_OUTPUT("HPL"),
  94 SND_SOC_DAPM_OUTPUT("OUTR"),
  95 SND_SOC_DAPM_OUTPUT("HPR"),
  96 SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
  97 SND_SOC_DAPM_INPUT("INL"),
  98 SND_SOC_DAPM_INPUT("INR"),
  99 };
 100
 101 static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
 102         /* output mixer */
 103         {"Output Mixer", NULL, "DAC"},
 104         {"Output Mixer", "Line In Switch", "Line Input"},
 105
 106         /* outputs */
 107         {"Headphone Output", NULL, "Output Mixer"},
 108         {"HPL", NULL, "Headphone Output"},
 109         {"HPR", NULL, "Headphone Output"},
 110         {"OUTL", NULL, "Output Mixer"},
 111         {"OUTR", NULL, "Output Mixer"},
 112
 113         /* inputs */
 114         {"Line Input", NULL, "INL"},
 115         {"Line Input", NULL, "INR"},
 116
 117         /* supplies */
 118         {"Output Mixer", NULL, "Charge Pump 1"},
 119         {"Output Mixer", NULL, "Charge Pump 2"},
 120         {"Output Mixer", NULL, "SHDN"},
 121         {"DAC", NULL, "MCLK"},
 122 };
 123
 124 static int max9850_hw_params(struct snd_pcm_substream *substream,
 125                              struct snd_pcm_hw_params *params,
 126                              struct snd_soc_dai *dai)
 127 {
 128         struct snd_soc_component *component = dai->component;
 129         struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
 130         u64 lrclk_div;
 131         u8 sf, da;
 132
 133         if (!max9850->sysclk)
 134                 return -EINVAL;
 135
 136         /* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
 137         sf = (snd_soc_component_read32(component, MAX9850_CLOCK) >> 2) + 1;
 138         lrclk_div = (1 << 22);
 139         lrclk_div *= params_rate(params);
 140         lrclk_div *= sf;
 141         do_div(lrclk_div, max9850->sysclk);
 142
 143         snd_soc_component_write(component, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
 144         snd_soc_component_write(component, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
 145
 146         switch (params_width(params)) {
 147         case 16:
 148                 da = 0;
 149                 break;
 150         case 20:
 151                 da = 0x2;
 152                 break;
 153         case 24:
 154                 da = 0x3;
 155                 break;
 156         default:
 157                 return -EINVAL;
 158         }
 159         snd_soc_component_update_bits(component, MAX9850_DIGITAL_AUDIO, 0x3, da);
 160
 161         return 0;
 162 }
 163
 164 static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 165                 int clk_id, unsigned int freq, int dir)
 166 {
 167         struct snd_soc_component *component = codec_dai->component;
 168         struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
 169
 170         /* calculate mclk -> iclk divider */
 171         if (freq <= 13000000)
 172                 snd_soc_component_write(component, MAX9850_CLOCK, 0x0);
 173         else if (freq <= 26000000)
 174                 snd_soc_component_write(component, MAX9850_CLOCK, 0x4);
 175         else if (freq <= 40000000)
 176                 snd_soc_component_write(component, MAX9850_CLOCK, 0x8);
 177         else
 178                 return -EINVAL;
 179
 180         max9850->sysclk = freq;
 181         return 0;
 182 }
 183
 184 static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 185 {
 186         struct snd_soc_component *component = codec_dai->component;
 187         u8 da = 0;
 188
 189         /* set master/slave audio interface */
 190         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 191         case SND_SOC_DAIFMT_CBM_CFM:
 192                 da |= MAX9850_MASTER;
 193                 break;
 194         case SND_SOC_DAIFMT_CBS_CFS:
 195                 break;
 196         default:
 197                 return -EINVAL;
 198         }
 199
 200         /* interface format */
 201         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 202         case SND_SOC_DAIFMT_I2S:
 203                 da |= MAX9850_DLY;
 204                 break;
 205         case SND_SOC_DAIFMT_RIGHT_J:
 206                 da |= MAX9850_RTJ;
 207                 break;
 208         case SND_SOC_DAIFMT_LEFT_J:
 209                 break;
 210         default:
 211                 return -EINVAL;
 212         }
 213
 214         /* clock inversion */
 215         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 216         case SND_SOC_DAIFMT_NB_NF:
 217                 break;
 218         case SND_SOC_DAIFMT_IB_IF:
 219                 da |= MAX9850_BCINV | MAX9850_INV;
 220                 break;
 221         case SND_SOC_DAIFMT_IB_NF:
 222                 da |= MAX9850_BCINV;
 223                 break;
 224         case SND_SOC_DAIFMT_NB_IF:
 225                 da |= MAX9850_INV;
 226                 break;
 227         default:
 228                 return -EINVAL;
 229         }
 230
 231         /* set da */
 232         snd_soc_component_write(component, MAX9850_DIGITAL_AUDIO, da);
 233
 234         return 0;
 235 }
 236
 237 static int max9850_set_bias_level(struct snd_soc_component *component,
 238                                   enum snd_soc_bias_level level)
 239 {
 240         struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
 241         int ret;
 242
 243         switch (level) {
 244         case SND_SOC_BIAS_ON:
 245                 break;
 246         case SND_SOC_BIAS_PREPARE:
 247                 break;
 248         case SND_SOC_BIAS_STANDBY:
 249                 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
 250                         ret = regcache_sync(max9850->regmap);
 251                         if (ret) {
 252                                 dev_err(component->dev,
 253                                         "Failed to sync cache: %d\n", ret);
 254                                 return ret;
 255                         }
 256                 }
 257                 break;
 258         case SND_SOC_BIAS_OFF:
 259                 break;
 260         }
 261         return 0;
 262 }
 263
 264 #define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
 265
 266 #define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 267         SNDRV_PCM_FMTBIT_S24_LE)
 268
 269 static const struct snd_soc_dai_ops max9850_dai_ops = {
 270         .hw_params      = max9850_hw_params,
 271         .set_sysclk     = max9850_set_dai_sysclk,
 272         .set_fmt        = max9850_set_dai_fmt,
 273 };
 274
 275 static struct snd_soc_dai_driver max9850_dai = {
 276         .name = "max9850-hifi",
 277         .playback = {
 278                 .stream_name = "Playback",
 279                 .channels_min = 1,
 280                 .channels_max = 2,
 281                 .rates = MAX9850_RATES,
 282                 .formats = MAX9850_FORMATS
 283         },
 284         .ops = &max9850_dai_ops,
 285 };
 286
 287 static int max9850_probe(struct snd_soc_component *component)
 288 {
 289         /* enable zero-detect */
 290         snd_soc_component_update_bits(component, MAX9850_GENERAL_PURPOSE, 1, 1);
 291         /* enable slew-rate control */
 292         snd_soc_component_update_bits(component, MAX9850_VOLUME, 0x40, 0x40);
 293         /* set slew-rate 125ms */
 294         snd_soc_component_update_bits(component, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
 295
 296         return 0;
 297 }
 298
 299 static const struct snd_soc_component_driver soc_component_dev_max9850 = {
 300         .probe                  = max9850_probe,
 301         .set_bias_level         = max9850_set_bias_level,
 302         .controls               = max9850_controls,
 303         .num_controls           = ARRAY_SIZE(max9850_controls),
 304         .dapm_widgets           = max9850_dapm_widgets,
 305         .num_dapm_widgets       = ARRAY_SIZE(max9850_dapm_widgets),
 306         .dapm_routes            = max9850_dapm_routes,
 307         .num_dapm_routes        = ARRAY_SIZE(max9850_dapm_routes),
 308         .suspend_bias_off       = 1,
 309         .idle_bias_on           = 1,
 310         .use_pmdown_time        = 1,
 311         .endianness             = 1,
 312         .non_legacy_dai_naming  = 1,
 313 };
 314
 315 static int max9850_i2c_probe(struct i2c_client *i2c,
 316                              const struct i2c_device_id *id)
 317 {
 318         struct max9850_priv *max9850;
 319         int ret;
 320
 321         max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
 322                                GFP_KERNEL);
 323         if (max9850 == NULL)
 324                 return -ENOMEM;
 325
 326         max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
 327         if (IS_ERR(max9850->regmap))
 328                 return PTR_ERR(max9850->regmap);
 329
 330         i2c_set_clientdata(i2c, max9850);
 331
 332         ret = devm_snd_soc_register_component(&i2c->dev,
 333                         &soc_component_dev_max9850, &max9850_dai, 1);
 334         return ret;
 335 }
 336
 337 static const struct i2c_device_id max9850_i2c_id[] = {
 338         { "max9850", 0 },
 339         { }
 340 };
 341 MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
 342
 343 static struct i2c_driver max9850_i2c_driver = {
 344         .driver = {
 345                 .name = "max9850",
 346         },
 347         .probe = max9850_i2c_probe,
 348         .id_table = max9850_i2c_id,
 349 };
 350
 351 module_i2c_driver(max9850_i2c_driver);
 352
 353 MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
 354 MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
 355 MODULE_LICENSE("GPL");