sound/soc/codecs/ak4118.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * ak4118.c  --  Asahi Kasei ALSA Soc Audio driver
   4  *
   5  * Copyright 2018 DEVIALET
   6  */
   7
   8 #include <linux/i2c.h>
   9 #include <linux/gpio/consumer.h>
  10 #include <linux/module.h>
  11 #include <linux/of_device.h>
  12 #include <linux/of_gpio.h>
  13 #include <linux/regmap.h>
  14 #include <linux/slab.h>
  15
  16 #include <sound/asoundef.h>
  17 #include <sound/core.h>
  18 #include <sound/initval.h>
  19 #include <sound/soc.h>
  20
  21 #define AK4118_REG_CLK_PWR_CTL          0x00
  22 #define AK4118_REG_FORMAT_CTL           0x01
  23 #define AK4118_REG_IO_CTL0              0x02
  24 #define AK4118_REG_IO_CTL1              0x03
  25 #define AK4118_REG_INT0_MASK            0x04
  26 #define AK4118_REG_INT1_MASK            0x05
  27 #define AK4118_REG_RCV_STATUS0          0x06
  28 #define AK4118_REG_RCV_STATUS1          0x07
  29 #define AK4118_REG_RXCHAN_STATUS0       0x08
  30 #define AK4118_REG_RXCHAN_STATUS1       0x09
  31 #define AK4118_REG_RXCHAN_STATUS2       0x0a
  32 #define AK4118_REG_RXCHAN_STATUS3       0x0b
  33 #define AK4118_REG_RXCHAN_STATUS4       0x0c
  34 #define AK4118_REG_TXCHAN_STATUS0       0x0d
  35 #define AK4118_REG_TXCHAN_STATUS1       0x0e
  36 #define AK4118_REG_TXCHAN_STATUS2       0x0f
  37 #define AK4118_REG_TXCHAN_STATUS3       0x10
  38 #define AK4118_REG_TXCHAN_STATUS4       0x11
  39 #define AK4118_REG_BURST_PREAMB_PC0     0x12
  40 #define AK4118_REG_BURST_PREAMB_PC1     0x13
  41 #define AK4118_REG_BURST_PREAMB_PD0     0x14
  42 #define AK4118_REG_BURST_PREAMB_PD1     0x15
  43 #define AK4118_REG_QSUB_CTL             0x16
  44 #define AK4118_REG_QSUB_TRACK           0x17
  45 #define AK4118_REG_QSUB_INDEX           0x18
  46 #define AK4118_REG_QSUB_MIN             0x19
  47 #define AK4118_REG_QSUB_SEC             0x1a
  48 #define AK4118_REG_QSUB_FRAME           0x1b
  49 #define AK4118_REG_QSUB_ZERO            0x1c
  50 #define AK4118_REG_QSUB_ABS_MIN         0x1d
  51 #define AK4118_REG_QSUB_ABS_SEC         0x1e
  52 #define AK4118_REG_QSUB_ABS_FRAME       0x1f
  53 #define AK4118_REG_GPE                  0x20
  54 #define AK4118_REG_GPDR                 0x21
  55 #define AK4118_REG_GPSCR                0x22
  56 #define AK4118_REG_GPLR                 0x23
  57 #define AK4118_REG_DAT_MASK_DTS         0x24
  58 #define AK4118_REG_RX_DETECT            0x25
  59 #define AK4118_REG_STC_DAT_DETECT       0x26
  60 #define AK4118_REG_RXCHAN_STATUS5       0x27
  61 #define AK4118_REG_TXCHAN_STATUS5       0x28
  62 #define AK4118_REG_MAX                  0x29
  63
  64 #define AK4118_REG_FORMAT_CTL_DIF0      (1 << 4)
  65 #define AK4118_REG_FORMAT_CTL_DIF1      (1 << 5)
  66 #define AK4118_REG_FORMAT_CTL_DIF2      (1 << 6)
  67
  68 struct ak4118_priv {
  69         struct regmap *regmap;
  70         struct gpio_desc *reset;
  71         struct gpio_desc *irq;
  72         struct snd_soc_component *component;
  73 };
  74
  75 static const struct reg_default ak4118_reg_defaults[] = {
  76         {AK4118_REG_CLK_PWR_CTL,        0x43},
  77         {AK4118_REG_FORMAT_CTL,         0x6a},
  78         {AK4118_REG_IO_CTL0,            0x88},
  79         {AK4118_REG_IO_CTL1,            0x48},
  80         {AK4118_REG_INT0_MASK,          0xee},
  81         {AK4118_REG_INT1_MASK,          0xb5},
  82         {AK4118_REG_RCV_STATUS0,        0x00},
  83         {AK4118_REG_RCV_STATUS1,        0x10},
  84         {AK4118_REG_TXCHAN_STATUS0,     0x00},
  85         {AK4118_REG_TXCHAN_STATUS1,     0x00},
  86         {AK4118_REG_TXCHAN_STATUS2,     0x00},
  87         {AK4118_REG_TXCHAN_STATUS3,     0x00},
  88         {AK4118_REG_TXCHAN_STATUS4,     0x00},
  89         {AK4118_REG_GPE,                0x77},
  90         {AK4118_REG_GPDR,               0x00},
  91         {AK4118_REG_GPSCR,              0x00},
  92         {AK4118_REG_GPLR,               0x00},
  93         {AK4118_REG_DAT_MASK_DTS,       0x3f},
  94         {AK4118_REG_RX_DETECT,          0x00},
  95         {AK4118_REG_STC_DAT_DETECT,     0x00},
  96         {AK4118_REG_TXCHAN_STATUS5,     0x00},
  97 };
  98
  99 static const char * const ak4118_input_select_txt[] = {
 100         "RX0", "RX1", "RX2", "RX3", "RX4", "RX5", "RX6", "RX7",
 101 };
 102 static SOC_ENUM_SINGLE_DECL(ak4118_insel_enum, AK4118_REG_IO_CTL1, 0x0,
 103                             ak4118_input_select_txt);
 104
 105 static const struct snd_kcontrol_new ak4118_input_mux_controls =
 106         SOC_DAPM_ENUM("Input Select", ak4118_insel_enum);
 107
 108 static const char * const ak4118_iec958_fs_txt[] = {
 109         "44100", "48000", "32000", "22050", "11025", "24000", "16000", "88200",
 110         "8000", "96000", "64000", "176400", "192000",
 111 };
 112
 113 static const int ak4118_iec958_fs_val[] = {
 114         0x0, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0xE,
 115 };
 116
 117 static SOC_VALUE_ENUM_SINGLE_DECL(ak4118_iec958_fs_enum, AK4118_REG_RCV_STATUS1,
 118                                   0x4, 0x4, ak4118_iec958_fs_txt,
 119                                   ak4118_iec958_fs_val);
 120
 121 static struct snd_kcontrol_new ak4118_iec958_controls[] = {
 122         SOC_SINGLE("IEC958 Parity Errors", AK4118_REG_RCV_STATUS0, 0, 1, 0),
 123         SOC_SINGLE("IEC958 No Audio", AK4118_REG_RCV_STATUS0, 1, 1, 0),
 124         SOC_SINGLE("IEC958 PLL Lock", AK4118_REG_RCV_STATUS0, 4, 1, 1),
 125         SOC_SINGLE("IEC958 Non PCM", AK4118_REG_RCV_STATUS0, 6, 1, 0),
 126         SOC_ENUM("IEC958 Sampling Freq", ak4118_iec958_fs_enum),
 127 };
 128
 129 static const struct snd_soc_dapm_widget ak4118_dapm_widgets[] = {
 130         SND_SOC_DAPM_INPUT("INRX0"),
 131         SND_SOC_DAPM_INPUT("INRX1"),
 132         SND_SOC_DAPM_INPUT("INRX2"),
 133         SND_SOC_DAPM_INPUT("INRX3"),
 134         SND_SOC_DAPM_INPUT("INRX4"),
 135         SND_SOC_DAPM_INPUT("INRX5"),
 136         SND_SOC_DAPM_INPUT("INRX6"),
 137         SND_SOC_DAPM_INPUT("INRX7"),
 138         SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
 139                          &ak4118_input_mux_controls),
 140 };
 141
 142 static const struct snd_soc_dapm_route ak4118_dapm_routes[] = {
 143         {"Input Mux", "RX0", "INRX0"},
 144         {"Input Mux", "RX1", "INRX1"},
 145         {"Input Mux", "RX2", "INRX2"},
 146         {"Input Mux", "RX3", "INRX3"},
 147         {"Input Mux", "RX4", "INRX4"},
 148         {"Input Mux", "RX5", "INRX5"},
 149         {"Input Mux", "RX6", "INRX6"},
 150         {"Input Mux", "RX7", "INRX7"},
 151 };
 152
 153
 154 static int ak4118_set_dai_fmt_master(struct ak4118_priv *ak4118,
 155                                      unsigned int format)
 156 {
 157         int dif;
 158
 159         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 160         case SND_SOC_DAIFMT_I2S:
 161                 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF2;
 162                 break;
 163         case SND_SOC_DAIFMT_RIGHT_J:
 164                 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1;
 165                 break;
 166         case SND_SOC_DAIFMT_LEFT_J:
 167                 dif = AK4118_REG_FORMAT_CTL_DIF2;
 168                 break;
 169         default:
 170                 return -ENOTSUPP;
 171         }
 172
 173         return dif;
 174 }
 175
 176 static int ak4118_set_dai_fmt_slave(struct ak4118_priv *ak4118,
 177                                     unsigned int format)
 178 {
 179         int dif;
 180
 181         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 182         case SND_SOC_DAIFMT_I2S:
 183                 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1 |
 184                       AK4118_REG_FORMAT_CTL_DIF2;
 185                 break;
 186         case SND_SOC_DAIFMT_LEFT_J:
 187                 dif = AK4118_REG_FORMAT_CTL_DIF1 | AK4118_REG_FORMAT_CTL_DIF2;
 188                 break;
 189         default:
 190                 return -ENOTSUPP;
 191         }
 192
 193         return dif;
 194 }
 195
 196 static int ak4118_set_dai_fmt(struct snd_soc_dai *dai,
 197                               unsigned int format)
 198 {
 199         struct snd_soc_component *component = dai->component;
 200         struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
 201         int dif;
 202         int ret = 0;
 203
 204         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 205         case SND_SOC_DAIFMT_CBM_CFM:
 206                 /* component is master */
 207                 dif = ak4118_set_dai_fmt_master(ak4118, format);
 208                 break;
 209         case SND_SOC_DAIFMT_CBS_CFS:
 210                 /*component is slave */
 211                 dif = ak4118_set_dai_fmt_slave(ak4118, format);
 212                 break;
 213         default:
 214                 ret = -ENOTSUPP;
 215                 goto exit;
 216         }
 217
 218         /* format not supported */
 219         if (dif < 0) {
 220                 ret = dif;
 221                 goto exit;
 222         }
 223
 224         ret = regmap_update_bits(ak4118->regmap, AK4118_REG_FORMAT_CTL,
 225                                  AK4118_REG_FORMAT_CTL_DIF0 |
 226                                  AK4118_REG_FORMAT_CTL_DIF1 |
 227                                  AK4118_REG_FORMAT_CTL_DIF2, dif);
 228         if (ret < 0)
 229                 goto exit;
 230
 231 exit:
 232         return ret;
 233 }
 234
 235 static int ak4118_hw_params(struct snd_pcm_substream *substream,
 236                             struct snd_pcm_hw_params *params,
 237                             struct snd_soc_dai *dai)
 238 {
 239         return 0;
 240 }
 241
 242 static const struct snd_soc_dai_ops ak4118_dai_ops = {
 243         .hw_params = ak4118_hw_params,
 244         .set_fmt   = ak4118_set_dai_fmt,
 245 };
 246
 247 static struct snd_soc_dai_driver ak4118_dai = {
 248         .name = "ak4118-hifi",
 249         .capture = {
 250                 .stream_name = "Capture",
 251                 .channels_min = 2,
 252                 .channels_max = 2,
 253                 .rates = SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
 254                          SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
 255                          SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
 256                          SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
 257                 .formats = SNDRV_PCM_FMTBIT_S16_LE  |
 258                            SNDRV_PCM_FMTBIT_S24_3LE |
 259                            SNDRV_PCM_FMTBIT_S24_LE
 260         },
 261         .ops = &ak4118_dai_ops,
 262 };
 263
 264 static irqreturn_t ak4118_irq_handler(int irq, void *data)
 265 {
 266         struct ak4118_priv *ak4118 = data;
 267         struct snd_soc_component *component = ak4118->component;
 268         struct snd_kcontrol_new *kctl_new;
 269         struct snd_kcontrol *kctl;
 270         struct snd_ctl_elem_id *id;
 271         unsigned int i;
 272
 273         if (!component)
 274                 return IRQ_NONE;
 275
 276         for (i = 0; i < ARRAY_SIZE(ak4118_iec958_controls); i++) {
 277                 kctl_new = &ak4118_iec958_controls[i];
 278                 kctl = snd_soc_card_get_kcontrol(component->card,
 279                                                  kctl_new->name);
 280                 if (!kctl)
 281                         continue;
 282                 id = &kctl->id;
 283                 snd_ctl_notify(component->card->snd_card,
 284                                SNDRV_CTL_EVENT_MASK_VALUE, id);
 285         }
 286
 287         return IRQ_HANDLED;
 288 }
 289
 290 static int ak4118_probe(struct snd_soc_component *component)
 291 {
 292         struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
 293         int ret = 0;
 294
 295         ak4118->component = component;
 296
 297         /* release reset */
 298         gpiod_set_value(ak4118->reset, 0);
 299
 300         /* unmask all int1 sources */
 301         ret = regmap_write(ak4118->regmap, AK4118_REG_INT1_MASK, 0x00);
 302         if (ret < 0) {
 303                 dev_err(component->dev,
 304                         "failed to write regmap 0x%x 0x%x: %d\n",
 305                         AK4118_REG_INT1_MASK, 0x00, ret);
 306                 return ret;
 307         }
 308
 309         /* rx detect enable on all channels */
 310         ret = regmap_write(ak4118->regmap, AK4118_REG_RX_DETECT, 0xff);
 311         if (ret < 0) {
 312                 dev_err(component->dev,
 313                         "failed to write regmap 0x%x 0x%x: %d\n",
 314                         AK4118_REG_RX_DETECT, 0xff, ret);
 315                 return ret;
 316         }
 317
 318         ret = snd_soc_add_component_controls(component, ak4118_iec958_controls,
 319                                          ARRAY_SIZE(ak4118_iec958_controls));
 320         if (ret) {
 321                 dev_err(component->dev,
 322                         "failed to add component kcontrols: %d\n", ret);
 323                 return ret;
 324         }
 325
 326         return 0;
 327 }
 328
 329 static void ak4118_remove(struct snd_soc_component *component)
 330 {
 331         struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
 332
 333         /* hold reset */
 334         gpiod_set_value(ak4118->reset, 1);
 335 }
 336
 337 static const struct snd_soc_component_driver soc_component_drv_ak4118 = {
 338         .probe                  = ak4118_probe,
 339         .remove                 = ak4118_remove,
 340         .dapm_widgets           = ak4118_dapm_widgets,
 341         .num_dapm_widgets       = ARRAY_SIZE(ak4118_dapm_widgets),
 342         .dapm_routes            = ak4118_dapm_routes,
 343         .num_dapm_routes        = ARRAY_SIZE(ak4118_dapm_routes),
 344         .idle_bias_on           = 1,
 345         .use_pmdown_time        = 1,
 346         .endianness             = 1,
 347         .non_legacy_dai_naming  = 1,
 348 };
 349
 350 static const struct regmap_config ak4118_regmap = {
 351         .reg_bits = 8,
 352         .val_bits = 8,
 353
 354         .reg_defaults = ak4118_reg_defaults,
 355         .num_reg_defaults = ARRAY_SIZE(ak4118_reg_defaults),
 356
 357         .cache_type = REGCACHE_NONE,
 358         .max_register = AK4118_REG_MAX - 1,
 359 };
 360
 361 static int ak4118_i2c_probe(struct i2c_client *i2c,
 362                             const struct i2c_device_id *id)
 363 {
 364         struct ak4118_priv *ak4118;
 365         int ret;
 366
 367         ak4118 = devm_kzalloc(&i2c->dev, sizeof(struct ak4118_priv),
 368                               GFP_KERNEL);
 369         if (ak4118 == NULL)
 370                 return -ENOMEM;
 371
 372         ak4118->regmap = devm_regmap_init_i2c(i2c, &ak4118_regmap);
 373         if (IS_ERR(ak4118->regmap))
 374                 return PTR_ERR(ak4118->regmap);
 375
 376         i2c_set_clientdata(i2c, ak4118);
 377
 378         ak4118->reset = devm_gpiod_get(&i2c->dev, "reset", GPIOD_OUT_HIGH);
 379         if (IS_ERR(ak4118->reset)) {
 380                 ret = PTR_ERR(ak4118->reset);
 381                 if (ret != -EPROBE_DEFER)
 382                         dev_err(&i2c->dev, "Failed to get reset: %d\n", ret);
 383                 return ret;
 384         }
 385
 386         ak4118->irq = devm_gpiod_get(&i2c->dev, "irq", GPIOD_IN);
 387         if (IS_ERR(ak4118->irq)) {
 388                 ret = PTR_ERR(ak4118->irq);
 389                 if (ret != -EPROBE_DEFER)
 390                         dev_err(&i2c->dev, "Failed to get IRQ: %d\n", ret);
 391                 return ret;
 392         }
 393
 394         ret = devm_request_threaded_irq(&i2c->dev, gpiod_to_irq(ak4118->irq),
 395                                         NULL, ak4118_irq_handler,
 396                                         IRQF_TRIGGER_RISING | IRQF_ONESHOT,
 397                                         "ak4118-irq", ak4118);
 398         if (ret < 0) {
 399                 dev_err(&i2c->dev, "Fail to request_irq: %d\n", ret);
 400                 return ret;
 401         }
 402
 403         return devm_snd_soc_register_component(&i2c->dev,
 404                                 &soc_component_drv_ak4118, &ak4118_dai, 1);
 405 }
 406
 407 static const struct of_device_id ak4118_of_match[] = {
 408         { .compatible = "asahi-kasei,ak4118", },
 409         {}
 410 };
 411 MODULE_DEVICE_TABLE(of, ak4118_of_match);
 412
 413 static const struct i2c_device_id ak4118_id_table[] = {
 414         { "ak4118", 0 },
 415         {}
 416 };
 417 MODULE_DEVICE_TABLE(i2c, ak4118_id_table);
 418
 419 static struct i2c_driver ak4118_i2c_driver = {
 420         .driver  = {
 421                 .name = "ak4118",
 422                 .of_match_table = of_match_ptr(ak4118_of_match),
 423         },
 424         .id_table = ak4118_id_table,
 425         .probe  = ak4118_i2c_probe,
 426 };
 427
 428 module_i2c_driver(ak4118_i2c_driver);
 429
 430 MODULE_DESCRIPTION("Asahi Kasei AK4118 ALSA SoC driver");
 431 MODULE_AUTHOR("Adrien Charruel <adrien.charruel@devialet.com>");
 432 MODULE_LICENSE("GPL");