sound/soc/codecs/sti-sas.c

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2015
   3  * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
   4  *          for STMicroelectronics.
   5  * License terms:  GNU General Public License (GPL), version 2
   6  */
   7
   8 #include <linux/io.h>
   9 #include <linux/module.h>
  10 #include <linux/regmap.h>
  11 #include <linux/reset.h>
  12 #include <linux/mfd/syscon.h>
  13
  14 #include <sound/soc.h>
  15 #include <sound/soc-dapm.h>
  16
  17 /* chipID supported */
  18 #define CHIPID_STIH416 0
  19 #define CHIPID_STIH407 1
  20
  21 /* DAC definitions */
  22
  23 /* stih416 DAC registers */
  24 /* sysconf 2517: Audio-DAC-Control */
  25 #define STIH416_AUDIO_DAC_CTRL 0x00000814
  26 /* sysconf 2519: Audio-Gue-Control */
  27 #define STIH416_AUDIO_GLUE_CTRL 0x0000081C
  28
  29 #define STIH416_DAC_NOT_STANDBY 0x3
  30 #define STIH416_DAC_SOFTMUTE    0x4
  31 #define STIH416_DAC_ANA_NOT_PWR 0x5
  32 #define STIH416_DAC_NOT_PNDBG   0x6
  33
  34 #define STIH416_DAC_NOT_STANDBY_MASK    BIT(STIH416_DAC_NOT_STANDBY)
  35 #define STIH416_DAC_SOFTMUTE_MASK       BIT(STIH416_DAC_SOFTMUTE)
  36 #define STIH416_DAC_ANA_NOT_PWR_MASK    BIT(STIH416_DAC_ANA_NOT_PWR)
  37 #define STIH416_DAC_NOT_PNDBG_MASK      BIT(STIH416_DAC_NOT_PNDBG)
  38
  39 /* stih407 DAC registers */
  40 /* sysconf 5041: Audio-Gue-Control */
  41 #define STIH407_AUDIO_GLUE_CTRL 0x000000A4
  42 /* sysconf 5042: Audio-DAC-Control */
  43 #define STIH407_AUDIO_DAC_CTRL 0x000000A8
  44
  45 /* DAC definitions */
  46 #define STIH407_DAC_SOFTMUTE            0x0
  47 #define STIH407_DAC_STANDBY_ANA         0x1
  48 #define STIH407_DAC_STANDBY             0x2
  49
  50 #define STIH407_DAC_SOFTMUTE_MASK       BIT(STIH407_DAC_SOFTMUTE)
  51 #define STIH407_DAC_STANDBY_ANA_MASK    BIT(STIH407_DAC_STANDBY_ANA)
  52 #define STIH407_DAC_STANDBY_MASK        BIT(STIH407_DAC_STANDBY)
  53
  54 /* SPDIF definitions */
  55 #define SPDIF_BIPHASE_ENABLE            0x6
  56 #define SPDIF_BIPHASE_IDLE              0x7
  57
  58 #define SPDIF_BIPHASE_ENABLE_MASK       BIT(SPDIF_BIPHASE_ENABLE)
  59 #define SPDIF_BIPHASE_IDLE_MASK         BIT(SPDIF_BIPHASE_IDLE)
  60
  61 enum {
  62         STI_SAS_DAI_SPDIF_OUT,
  63         STI_SAS_DAI_ANALOG_OUT,
  64 };
  65
  66 static const struct reg_default stih416_sas_reg_defaults[] = {
  67         { STIH407_AUDIO_GLUE_CTRL, 0x00000040 },
  68         { STIH407_AUDIO_DAC_CTRL, 0x000000000 },
  69 };
  70
  71 static const struct reg_default stih407_sas_reg_defaults[] = {
  72         { STIH416_AUDIO_DAC_CTRL, 0x000000000 },
  73         { STIH416_AUDIO_GLUE_CTRL, 0x00000040 },
  74 };
  75
  76 struct sti_dac_audio {
  77         struct regmap *regmap;
  78         struct regmap *virt_regmap;
  79         struct regmap_field  **field;
  80         struct reset_control *rst;
  81         int mclk;
  82 };
  83
  84 struct sti_spdif_audio {
  85         struct regmap *regmap;
  86         struct regmap_field  **field;
  87         int mclk;
  88 };
  89
  90 /* device data structure */
  91 struct sti_sas_dev_data {
  92         const int chipid; /* IC version */
  93         const struct regmap_config *regmap;
  94         const struct snd_soc_dai_ops *dac_ops;  /* DAC function callbacks */
  95         const struct snd_soc_dapm_widget *dapm_widgets; /* dapms declaration */
  96         const int num_dapm_widgets; /* dapms declaration */
  97         const struct snd_soc_dapm_route *dapm_routes; /* route declaration */
  98         const int num_dapm_routes; /* route declaration */
  99 };
 100
 101 /* driver data structure */
 102 struct sti_sas_data {
 103         struct device *dev;
 104         const struct sti_sas_dev_data *dev_data;
 105         struct sti_dac_audio dac;
 106         struct sti_spdif_audio spdif;
 107 };
 108
 109 /* Read a register from the sysconf reg bank */
 110 static int sti_sas_read_reg(void *context, unsigned int reg,
 111                             unsigned int *value)
 112 {
 113         struct sti_sas_data *drvdata = context;
 114         int status;
 115         u32 val;
 116
 117         status = regmap_read(drvdata->dac.regmap, reg, &val);
 118         *value = (unsigned int)val;
 119
 120         return status;
 121 }
 122
 123 /* Read a register from the sysconf reg bank */
 124 static int sti_sas_write_reg(void *context, unsigned int reg,
 125                              unsigned int value)
 126 {
 127         struct sti_sas_data *drvdata = context;
 128         int status;
 129
 130         status = regmap_write(drvdata->dac.regmap, reg, value);
 131
 132         return status;
 133 }
 134
 135 static int  sti_sas_init_sas_registers(struct snd_soc_codec *codec,
 136                                        struct sti_sas_data *data)
 137 {
 138         int ret;
 139         /*
 140          * DAC and SPDIF are activated by default
 141          * put them in IDLE to save power
 142          */
 143
 144         /* Initialise bi-phase formatter to disabled */
 145         ret = snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
 146                                   SPDIF_BIPHASE_ENABLE_MASK, 0);
 147
 148         if (!ret)
 149                 /* Initialise bi-phase formatter idle value to 0 */
 150                 ret = snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
 151                                           SPDIF_BIPHASE_IDLE_MASK, 0);
 152         if (ret < 0) {
 153                 dev_err(codec->dev, "Failed to update SPDIF registers");
 154                 return ret;
 155         }
 156
 157         /* Init DAC configuration */
 158         switch (data->dev_data->chipid) {
 159         case CHIPID_STIH407:
 160                 /* init configuration */
 161                 ret =  snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
 162                                            STIH407_DAC_STANDBY_MASK,
 163                                            STIH407_DAC_STANDBY_MASK);
 164
 165                 if (!ret)
 166                         ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
 167                                                   STIH407_DAC_STANDBY_ANA_MASK,
 168                                                   STIH407_DAC_STANDBY_ANA_MASK);
 169                 if (!ret)
 170                         ret = snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
 171                                                   STIH407_DAC_SOFTMUTE_MASK,
 172                                                   STIH407_DAC_SOFTMUTE_MASK);
 173                 break;
 174         case CHIPID_STIH416:
 175                 ret =  snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
 176                                            STIH416_DAC_NOT_STANDBY_MASK, 0);
 177                 if (!ret)
 178                         ret =  snd_soc_update_bits(codec,
 179                                                    STIH416_AUDIO_DAC_CTRL,
 180                                                    STIH416_DAC_ANA_NOT_PWR, 0);
 181                 if (!ret)
 182                         ret =  snd_soc_update_bits(codec,
 183                                                    STIH416_AUDIO_DAC_CTRL,
 184                                                    STIH416_DAC_NOT_PNDBG_MASK,
 185                                                    0);
 186                 if (!ret)
 187                         ret =  snd_soc_update_bits(codec,
 188                                                    STIH416_AUDIO_DAC_CTRL,
 189                                                    STIH416_DAC_SOFTMUTE_MASK,
 190                                                    STIH416_DAC_SOFTMUTE_MASK);
 191                 break;
 192         default:
 193                 return -EINVAL;
 194         }
 195
 196         if (ret < 0) {
 197                 dev_err(codec->dev, "Failed to update DAC registers");
 198                 return ret;
 199         }
 200
 201         return ret;
 202 }
 203
 204 /*
 205  * DAC
 206  */
 207 static int sti_sas_dac_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 208 {
 209         /* Sanity check only */
 210         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
 211                 dev_err(dai->codec->dev,
 212                         "%s: ERROR: Unsupporter master mask 0x%x\n",
 213                         __func__, fmt & SND_SOC_DAIFMT_MASTER_MASK);
 214                 return -EINVAL;
 215         }
 216
 217         return 0;
 218 }
 219
 220 static int stih416_dac_probe(struct snd_soc_dai *dai)
 221 {
 222         struct snd_soc_codec *codec = dai->codec;
 223         struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
 224         struct sti_dac_audio *dac = &drvdata->dac;
 225
 226         /* Get reset control */
 227         dac->rst = devm_reset_control_get(codec->dev, "dac_rst");
 228         if (IS_ERR(dac->rst)) {
 229                 dev_err(dai->codec->dev,
 230                         "%s: ERROR: DAC reset control not defined !\n",
 231                         __func__);
 232                 dac->rst = NULL;
 233                 return -EFAULT;
 234         }
 235         /* Put the DAC into reset */
 236         reset_control_assert(dac->rst);
 237
 238         return 0;
 239 }
 240
 241 static const struct snd_soc_dapm_widget stih416_sas_dapm_widgets[] = {
 242         SND_SOC_DAPM_PGA("DAC bandgap", STIH416_AUDIO_DAC_CTRL,
 243                          STIH416_DAC_NOT_PNDBG_MASK, 0, NULL, 0),
 244         SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH416_AUDIO_DAC_CTRL,
 245                              STIH416_DAC_ANA_NOT_PWR, 0, NULL, 0),
 246         SND_SOC_DAPM_DAC("DAC standby",  "dac_p", STIH416_AUDIO_DAC_CTRL,
 247                          STIH416_DAC_NOT_STANDBY, 0),
 248         SND_SOC_DAPM_OUTPUT("DAC Output"),
 249 };
 250
 251 static const struct snd_soc_dapm_widget stih407_sas_dapm_widgets[] = {
 252         SND_SOC_DAPM_OUT_DRV("DAC standby ana", STIH407_AUDIO_DAC_CTRL,
 253                              STIH407_DAC_STANDBY_ANA, 1, NULL, 0),
 254         SND_SOC_DAPM_DAC("DAC standby",  "dac_p", STIH407_AUDIO_DAC_CTRL,
 255                          STIH407_DAC_STANDBY, 1),
 256         SND_SOC_DAPM_OUTPUT("DAC Output"),
 257 };
 258
 259 static const struct snd_soc_dapm_route stih416_sas_route[] = {
 260         {"DAC Output", NULL, "DAC bandgap"},
 261         {"DAC Output", NULL, "DAC standby ana"},
 262         {"DAC standby ana", NULL, "DAC standby"},
 263 };
 264
 265 static const struct snd_soc_dapm_route stih407_sas_route[] = {
 266         {"DAC Output", NULL, "DAC standby ana"},
 267         {"DAC standby ana", NULL, "DAC standby"},
 268 };
 269
 270 static int stih416_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream)
 271 {
 272         struct snd_soc_codec *codec = dai->codec;
 273
 274         if (mute) {
 275                 return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
 276                                             STIH416_DAC_SOFTMUTE_MASK,
 277                                             STIH416_DAC_SOFTMUTE_MASK);
 278         } else {
 279                 return snd_soc_update_bits(codec, STIH416_AUDIO_DAC_CTRL,
 280                                             STIH416_DAC_SOFTMUTE_MASK, 0);
 281         }
 282 }
 283
 284 static int stih407_sas_dac_mute(struct snd_soc_dai *dai, int mute, int stream)
 285 {
 286         struct snd_soc_codec *codec = dai->codec;
 287
 288         if (mute) {
 289                 return snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
 290                                             STIH407_DAC_SOFTMUTE_MASK,
 291                                             STIH407_DAC_SOFTMUTE_MASK);
 292         } else {
 293                 return snd_soc_update_bits(codec, STIH407_AUDIO_DAC_CTRL,
 294                                             STIH407_DAC_SOFTMUTE_MASK,
 295                                             0);
 296         }
 297 }
 298
 299 /*
 300  * SPDIF
 301  */
 302 static int sti_sas_spdif_set_fmt(struct snd_soc_dai *dai,
 303                                  unsigned int fmt)
 304 {
 305         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
 306                 dev_err(dai->codec->dev,
 307                         "%s: ERROR: Unsupporter master mask 0x%x\n",
 308                         __func__, fmt & SND_SOC_DAIFMT_MASTER_MASK);
 309                 return -EINVAL;
 310         }
 311
 312         return 0;
 313 }
 314
 315 /*
 316  * sti_sas_spdif_trigger:
 317  * Trigger function is used to ensure that BiPhase Formater is disabled
 318  * before CPU dai is stopped.
 319  * This is mandatory to avoid that BPF is stalled
 320  */
 321 static int sti_sas_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
 322                                  struct snd_soc_dai *dai)
 323 {
 324         struct snd_soc_codec *codec = dai->codec;
 325
 326         switch (cmd) {
 327         case SNDRV_PCM_TRIGGER_START:
 328         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 329                 return snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
 330                                             SPDIF_BIPHASE_ENABLE_MASK,
 331                                             SPDIF_BIPHASE_ENABLE_MASK);
 332         case SNDRV_PCM_TRIGGER_RESUME:
 333         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 334         case SNDRV_PCM_TRIGGER_STOP:
 335         case SNDRV_PCM_TRIGGER_SUSPEND:
 336                 return snd_soc_update_bits(codec, STIH407_AUDIO_GLUE_CTRL,
 337                                             SPDIF_BIPHASE_ENABLE_MASK,
 338                                             0);
 339         default:
 340                 return -EINVAL;
 341         }
 342 }
 343
 344 static bool sti_sas_volatile_register(struct device *dev, unsigned int reg)
 345 {
 346         if (reg == STIH407_AUDIO_GLUE_CTRL)
 347                 return true;
 348
 349         return false;
 350 }
 351
 352 /*
 353  * CODEC DAIS
 354  */
 355
 356 /*
 357  * sti_sas_set_sysclk:
 358  * get MCLK input frequency to check that MCLK-FS ratio is coherent
 359  */
 360 static int sti_sas_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 361                               unsigned int freq, int dir)
 362 {
 363         struct snd_soc_codec *codec = dai->codec;
 364         struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
 365
 366         if (dir == SND_SOC_CLOCK_OUT)
 367                 return 0;
 368
 369         if (clk_id != 0)
 370                 return -EINVAL;
 371
 372         switch (dai->id) {
 373         case STI_SAS_DAI_SPDIF_OUT:
 374                 drvdata->spdif.mclk = freq;
 375                 break;
 376
 377         case STI_SAS_DAI_ANALOG_OUT:
 378                 drvdata->dac.mclk = freq;
 379                 break;
 380         }
 381
 382         return 0;
 383 }
 384
 385 static int sti_sas_prepare(struct snd_pcm_substream *substream,
 386                            struct snd_soc_dai *dai)
 387 {
 388         struct snd_soc_codec *codec = dai->codec;
 389         struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
 390         struct snd_pcm_runtime *runtime = substream->runtime;
 391
 392         switch (dai->id) {
 393         case STI_SAS_DAI_SPDIF_OUT:
 394                 if ((drvdata->spdif.mclk / runtime->rate) != 128) {
 395                         dev_err(codec->dev, "unexpected mclk-fs ratio");
 396                         return -EINVAL;
 397                 }
 398                 break;
 399         case STI_SAS_DAI_ANALOG_OUT:
 400                 if ((drvdata->dac.mclk / runtime->rate) != 256) {
 401                         dev_err(codec->dev, "unexpected mclk-fs ratio");
 402                         return -EINVAL;
 403                 }
 404                 break;
 405         }
 406
 407         return 0;
 408 }
 409
 410 static const struct snd_soc_dai_ops stih416_dac_ops = {
 411         .set_fmt = sti_sas_dac_set_fmt,
 412         .mute_stream = stih416_sas_dac_mute,
 413         .prepare = sti_sas_prepare,
 414         .set_sysclk = sti_sas_set_sysclk,
 415 };
 416
 417 static const struct snd_soc_dai_ops stih407_dac_ops = {
 418         .set_fmt = sti_sas_dac_set_fmt,
 419         .mute_stream = stih407_sas_dac_mute,
 420         .prepare = sti_sas_prepare,
 421         .set_sysclk = sti_sas_set_sysclk,
 422 };
 423
 424 static const struct regmap_config stih407_sas_regmap = {
 425         .reg_bits = 32,
 426         .val_bits = 32,
 427
 428         .max_register = STIH407_AUDIO_DAC_CTRL,
 429         .reg_defaults = stih407_sas_reg_defaults,
 430         .num_reg_defaults = ARRAY_SIZE(stih407_sas_reg_defaults),
 431         .volatile_reg = sti_sas_volatile_register,
 432         .cache_type = REGCACHE_RBTREE,
 433         .reg_read = sti_sas_read_reg,
 434         .reg_write = sti_sas_write_reg,
 435 };
 436
 437 static const struct regmap_config stih416_sas_regmap = {
 438         .reg_bits = 32,
 439         .val_bits = 32,
 440
 441         .max_register = STIH416_AUDIO_DAC_CTRL,
 442         .reg_defaults = stih416_sas_reg_defaults,
 443         .num_reg_defaults = ARRAY_SIZE(stih416_sas_reg_defaults),
 444         .volatile_reg = sti_sas_volatile_register,
 445         .cache_type = REGCACHE_RBTREE,
 446         .reg_read = sti_sas_read_reg,
 447         .reg_write = sti_sas_write_reg,
 448 };
 449
 450 static const struct sti_sas_dev_data stih416_data = {
 451         .chipid = CHIPID_STIH416,
 452         .regmap = &stih416_sas_regmap,
 453         .dac_ops = &stih416_dac_ops,
 454         .dapm_widgets = stih416_sas_dapm_widgets,
 455         .num_dapm_widgets = ARRAY_SIZE(stih416_sas_dapm_widgets),
 456         .dapm_routes =  stih416_sas_route,
 457         .num_dapm_routes = ARRAY_SIZE(stih416_sas_route),
 458 };
 459
 460 static const struct sti_sas_dev_data stih407_data = {
 461         .chipid = CHIPID_STIH407,
 462         .regmap = &stih407_sas_regmap,
 463         .dac_ops = &stih407_dac_ops,
 464         .dapm_widgets = stih407_sas_dapm_widgets,
 465         .num_dapm_widgets = ARRAY_SIZE(stih407_sas_dapm_widgets),
 466         .dapm_routes =  stih407_sas_route,
 467         .num_dapm_routes = ARRAY_SIZE(stih407_sas_route),
 468 };
 469
 470 static struct snd_soc_dai_driver sti_sas_dai[] = {
 471         {
 472                 .name = "sas-dai-spdif-out",
 473                 .id = STI_SAS_DAI_SPDIF_OUT,
 474                 .playback = {
 475                         .stream_name = "spdif_p",
 476                         .channels_min = 2,
 477                         .channels_max = 2,
 478                         .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
 479                                  SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 |
 480                                  SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
 481                                  SNDRV_PCM_RATE_192000,
 482                         .formats = SNDRV_PCM_FMTBIT_S16_LE |
 483                                    SNDRV_PCM_FMTBIT_S32_LE,
 484                 },
 485                 .ops = (struct snd_soc_dai_ops[]) {
 486                         {
 487                                 .set_fmt = sti_sas_spdif_set_fmt,
 488                                 .trigger = sti_sas_spdif_trigger,
 489                                 .set_sysclk = sti_sas_set_sysclk,
 490                                 .prepare = sti_sas_prepare,
 491                         }
 492                 },
 493         },
 494         {
 495                 .name = "sas-dai-dac",
 496                 .id = STI_SAS_DAI_ANALOG_OUT,
 497                 .playback = {
 498                         .stream_name = "dac_p",
 499                         .channels_min = 2,
 500                         .channels_max = 2,
 501                         .rates = SNDRV_PCM_RATE_8000_48000,
 502                         .formats = SNDRV_PCM_FMTBIT_S16_LE |
 503                                    SNDRV_PCM_FMTBIT_S32_LE,
 504                 },
 505         },
 506 };
 507
 508 #ifdef CONFIG_PM_SLEEP
 509 static int sti_sas_resume(struct snd_soc_codec *codec)
 510 {
 511         struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
 512
 513         return sti_sas_init_sas_registers(codec, drvdata);
 514 }
 515 #else
 516 #define sti_sas_resume NULL
 517 #endif
 518
 519 static int sti_sas_codec_probe(struct snd_soc_codec *codec)
 520 {
 521         struct sti_sas_data *drvdata = dev_get_drvdata(codec->dev);
 522         int ret;
 523
 524         ret = sti_sas_init_sas_registers(codec, drvdata);
 525
 526         return ret;
 527 }
 528
 529 static struct snd_soc_codec_driver sti_sas_driver = {
 530         .probe = sti_sas_codec_probe,
 531         .resume = sti_sas_resume,
 532 };
 533
 534 static const struct of_device_id sti_sas_dev_match[] = {
 535         {
 536                 .compatible = "st,stih416-sas-codec",
 537                 .data = &stih416_data,
 538         },
 539         {
 540                 .compatible = "st,stih407-sas-codec",
 541                 .data = &stih407_data,
 542         },
 543         {},
 544 };
 545
 546 static int sti_sas_driver_probe(struct platform_device *pdev)
 547 {
 548         struct device_node *pnode = pdev->dev.of_node;
 549         struct sti_sas_data *drvdata;
 550         const struct of_device_id *of_id;
 551
 552         /* Allocate device structure */
 553         drvdata = devm_kzalloc(&pdev->dev, sizeof(struct sti_sas_data),
 554                                GFP_KERNEL);
 555         if (!drvdata)
 556                 return -ENOMEM;
 557
 558         /* Populate data structure depending on compatibility */
 559         of_id = of_match_node(sti_sas_dev_match, pnode);
 560         if (!of_id->data) {
 561                 dev_err(&pdev->dev, "data associated to device is missing");
 562                 return -EINVAL;
 563         }
 564
 565         drvdata->dev_data = (struct sti_sas_dev_data *)of_id->data;
 566
 567         /* Initialise device structure */
 568         drvdata->dev = &pdev->dev;
 569
 570         /* Request the DAC & SPDIF registers memory region */
 571         drvdata->dac.virt_regmap = devm_regmap_init(&pdev->dev, NULL, drvdata,
 572                                                     drvdata->dev_data->regmap);
 573         if (IS_ERR(drvdata->dac.virt_regmap)) {
 574                 dev_err(&pdev->dev, "audio registers not enabled\n");
 575                 return PTR_ERR(drvdata->dac.virt_regmap);
 576         }
 577
 578         /* Request the syscon region */
 579         drvdata->dac.regmap =
 580                 syscon_regmap_lookup_by_phandle(pnode, "st,syscfg");
 581         if (IS_ERR(drvdata->dac.regmap)) {
 582                 dev_err(&pdev->dev, "syscon registers not available\n");
 583                 return PTR_ERR(drvdata->dac.regmap);
 584         }
 585         drvdata->spdif.regmap = drvdata->dac.regmap;
 586
 587         /* Set DAC dai probe */
 588         if (drvdata->dev_data->chipid == CHIPID_STIH416)
 589                 sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].probe = stih416_dac_probe;
 590
 591         sti_sas_dai[STI_SAS_DAI_ANALOG_OUT].ops = drvdata->dev_data->dac_ops;
 592
 593         /* Set dapms*/
 594         sti_sas_driver.component_driver.dapm_widgets = drvdata->dev_data->dapm_widgets;
 595         sti_sas_driver.component_driver.num_dapm_widgets = drvdata->dev_data->num_dapm_widgets;
 596
 597         sti_sas_driver.component_driver.dapm_routes = drvdata->dev_data->dapm_routes;
 598         sti_sas_driver.component_driver.num_dapm_routes = drvdata->dev_data->num_dapm_routes;
 599
 600         /* Store context */
 601         dev_set_drvdata(&pdev->dev, drvdata);
 602
 603         return snd_soc_register_codec(&pdev->dev, &sti_sas_driver,
 604                                         sti_sas_dai,
 605                                         ARRAY_SIZE(sti_sas_dai));
 606 }
 607
 608 static int sti_sas_driver_remove(struct platform_device *pdev)
 609 {
 610         snd_soc_unregister_codec(&pdev->dev);
 611
 612         return 0;
 613 }
 614
 615 static struct platform_driver sti_sas_platform_driver = {
 616         .driver = {
 617                 .name = "sti-sas-codec",
 618                 .of_match_table = sti_sas_dev_match,
 619         },
 620         .probe = sti_sas_driver_probe,
 621         .remove = sti_sas_driver_remove,
 622 };
 623
 624 module_platform_driver(sti_sas_platform_driver);
 625
 626 MODULE_DESCRIPTION("audio codec for STMicroelectronics sti platforms");
 627 MODULE_AUTHOR("Arnaud.pouliquen@st.com");
 628 MODULE_LICENSE("GPL v2");