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