sound/soc/codecs/tas2770.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // ALSA SoC Texas Instruments TAS2770 20-W Digital Input Mono Class-D
   4 // Audio Amplifier with Speaker I/V Sense
   5 //
   6 // Copyright (C) 2016-2017 Texas Instruments Incorporated - https://www.ti.com/
   7 //      Author: Tracy Yi <[email protected]>
   8 //      Frank Shi <[email protected]>
   9
  10 #include <linux/module.h>
  11 #include <linux/moduleparam.h>
  12 #include <linux/err.h>
  13 #include <linux/init.h>
  14 #include <linux/delay.h>
  15 #include <linux/pm.h>
  16 #include <linux/i2c.h>
  17 #include <linux/gpio.h>
  18 #include <linux/gpio/consumer.h>
  19 #include <linux/regulator/consumer.h>
  20 #include <linux/firmware.h>
  21 #include <linux/regmap.h>
  22 #include <linux/of.h>
  23 #include <linux/of_gpio.h>
  24 #include <linux/slab.h>
  25 #include <sound/soc.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/initval.h>
  29 #include <sound/tlv.h>
  30
  31 #include "tas2770.h"
  32
  33 #define TAS2770_MDELAY 0xFFFFFFFE
  34
  35 static void tas2770_reset(struct tas2770_priv *tas2770)
  36 {
  37         if (tas2770->reset_gpio) {
  38                 gpiod_set_value_cansleep(tas2770->reset_gpio, 0);
  39                 msleep(20);
  40                 gpiod_set_value_cansleep(tas2770->reset_gpio, 1);
  41         }
  42
  43         snd_soc_component_write(tas2770->component, TAS2770_SW_RST,
  44                 TAS2770_RST);
  45 }
  46
  47 static int tas2770_set_bias_level(struct snd_soc_component *component,
  48                                  enum snd_soc_bias_level level)
  49 {
  50         struct tas2770_priv *tas2770 =
  51                         snd_soc_component_get_drvdata(component);
  52
  53         switch (level) {
  54         case SND_SOC_BIAS_ON:
  55                 snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
  56                                               TAS2770_PWR_CTRL_MASK,
  57                                               TAS2770_PWR_CTRL_ACTIVE);
  58                 break;
  59         case SND_SOC_BIAS_STANDBY:
  60         case SND_SOC_BIAS_PREPARE:
  61                 snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
  62                                               TAS2770_PWR_CTRL_MASK,
  63                                               TAS2770_PWR_CTRL_MUTE);
  64                 break;
  65         case SND_SOC_BIAS_OFF:
  66                 snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
  67                                               TAS2770_PWR_CTRL_MASK,
  68                                               TAS2770_PWR_CTRL_SHUTDOWN);
  69                 break;
  70
  71         default:
  72                 dev_err(tas2770->dev, "wrong power level setting %d\n", level);
  73                 return -EINVAL;
  74         }
  75
  76         return 0;
  77 }
  78
  79 #ifdef CONFIG_PM
  80 static int tas2770_codec_suspend(struct snd_soc_component *component)
  81 {
  82         struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
  83         int ret = 0;
  84
  85         regcache_cache_only(tas2770->regmap, true);
  86         regcache_mark_dirty(tas2770->regmap);
  87
  88         if (tas2770->sdz_gpio) {
  89                 gpiod_set_value_cansleep(tas2770->sdz_gpio, 0);
  90         } else {
  91                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
  92                                                     TAS2770_PWR_CTRL_MASK,
  93                                                     TAS2770_PWR_CTRL_SHUTDOWN);
  94                 if (ret < 0) {
  95                         regcache_cache_only(tas2770->regmap, false);
  96                         regcache_sync(tas2770->regmap);
  97                         return ret;
  98                 }
  99
 100                 ret = 0;
 101         }
 102
 103         return ret;
 104 }
 105
 106 static int tas2770_codec_resume(struct snd_soc_component *component)
 107 {
 108         struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
 109         int ret = 0;
 110
 111         if (tas2770->sdz_gpio) {
 112                 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
 113         } else {
 114                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 115                                                     TAS2770_PWR_CTRL_MASK,
 116                                                     TAS2770_PWR_CTRL_ACTIVE);
 117                 if (ret < 0)
 118                         return ret;
 119         }
 120
 121         regcache_cache_only(tas2770->regmap, false);
 122
 123         return regcache_sync(tas2770->regmap);
 124 }
 125 #else
 126 #define tas2770_codec_suspend NULL
 127 #define tas2770_codec_resume NULL
 128 #endif
 129
 130 static const char * const tas2770_ASI1_src[] = {
 131         "I2C offset", "Left", "Right", "LeftRightDiv2",
 132 };
 133
 134 static SOC_ENUM_SINGLE_DECL(
 135         tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2,
 136         4, tas2770_ASI1_src);
 137
 138 static const struct snd_kcontrol_new tas2770_asi1_mux =
 139         SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum);
 140
 141 static int tas2770_dac_event(struct snd_soc_dapm_widget *w,
 142                              struct snd_kcontrol *kcontrol, int event)
 143 {
 144         struct snd_soc_component *component =
 145                         snd_soc_dapm_to_component(w->dapm);
 146         struct tas2770_priv *tas2770 =
 147                         snd_soc_component_get_drvdata(component);
 148         int ret;
 149
 150         switch (event) {
 151         case SND_SOC_DAPM_POST_PMU:
 152                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 153                                                     TAS2770_PWR_CTRL_MASK,
 154                                                     TAS2770_PWR_CTRL_MUTE);
 155                 break;
 156         case SND_SOC_DAPM_PRE_PMD:
 157                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 158                                                     TAS2770_PWR_CTRL_MASK,
 159                                                     TAS2770_PWR_CTRL_SHUTDOWN);
 160                 break;
 161         default:
 162                 dev_err(tas2770->dev, "Not supported evevt\n");
 163                 return -EINVAL;
 164         }
 165
 166         if (ret < 0)
 167                 return ret;
 168
 169         return 0;
 170 }
 171
 172 static const struct snd_kcontrol_new isense_switch =
 173         SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1);
 174 static const struct snd_kcontrol_new vsense_switch =
 175         SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1);
 176
 177 static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = {
 178         SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
 179         SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux),
 180         SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch),
 181         SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch),
 182         SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event,
 183                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 184         SND_SOC_DAPM_OUTPUT("OUT"),
 185         SND_SOC_DAPM_SIGGEN("VMON"),
 186         SND_SOC_DAPM_SIGGEN("IMON")
 187 };
 188
 189 static const struct snd_soc_dapm_route tas2770_audio_map[] = {
 190         {"ASI1 Sel", "I2C offset", "ASI1"},
 191         {"ASI1 Sel", "Left", "ASI1"},
 192         {"ASI1 Sel", "Right", "ASI1"},
 193         {"ASI1 Sel", "LeftRightDiv2", "ASI1"},
 194         {"DAC", NULL, "ASI1 Sel"},
 195         {"OUT", NULL, "DAC"},
 196         {"ISENSE", "Switch", "IMON"},
 197         {"VSENSE", "Switch", "VMON"},
 198 };
 199
 200 static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction)
 201 {
 202         struct snd_soc_component *component = dai->component;
 203         int ret;
 204
 205         if (mute)
 206                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 207                                                     TAS2770_PWR_CTRL_MASK,
 208                                                     TAS2770_PWR_CTRL_MUTE);
 209         else
 210                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 211                                                     TAS2770_PWR_CTRL_MASK,
 212                                                     TAS2770_PWR_CTRL_ACTIVE);
 213
 214         if (ret < 0)
 215                 return ret;
 216
 217         return 0;
 218 }
 219
 220 static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth)
 221 {
 222         int ret;
 223         struct snd_soc_component *component = tas2770->component;
 224
 225         switch (bitwidth) {
 226         case SNDRV_PCM_FORMAT_S16_LE:
 227                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 228                                                     TAS2770_TDM_CFG_REG2_RXW_MASK,
 229                                                     TAS2770_TDM_CFG_REG2_RXW_16BITS);
 230                 tas2770->v_sense_slot = tas2770->i_sense_slot + 2;
 231                 break;
 232         case SNDRV_PCM_FORMAT_S24_LE:
 233                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 234                                                     TAS2770_TDM_CFG_REG2_RXW_MASK,
 235                                                     TAS2770_TDM_CFG_REG2_RXW_24BITS);
 236                 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
 237                 break;
 238         case SNDRV_PCM_FORMAT_S32_LE:
 239                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 240                                                     TAS2770_TDM_CFG_REG2_RXW_MASK,
 241                                                     TAS2770_TDM_CFG_REG2_RXW_32BITS);
 242                 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
 243                 break;
 244
 245         default:
 246                 return -EINVAL;
 247         }
 248
 249         if (ret < 0)
 250                 return ret;
 251
 252         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5,
 253                                             TAS2770_TDM_CFG_REG5_VSNS_MASK |
 254                                             TAS2770_TDM_CFG_REG5_50_MASK,
 255                                             TAS2770_TDM_CFG_REG5_VSNS_ENABLE |
 256                 tas2770->v_sense_slot);
 257         if (ret < 0)
 258                 return ret;
 259
 260         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6,
 261                                             TAS2770_TDM_CFG_REG6_ISNS_MASK |
 262                                             TAS2770_TDM_CFG_REG6_50_MASK,
 263                                             TAS2770_TDM_CFG_REG6_ISNS_ENABLE |
 264                                             tas2770->i_sense_slot);
 265         if (ret < 0)
 266                 return ret;
 267
 268         return 0;
 269 }
 270
 271 static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate)
 272 {
 273         struct snd_soc_component *component = tas2770->component;
 274         int ramp_rate_val;
 275         int ret;
 276
 277         switch (samplerate) {
 278         case 48000:
 279                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
 280                                 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
 281                 break;
 282         case 44100:
 283                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
 284                                 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
 285                 break;
 286         case 96000:
 287                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
 288                                 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
 289                 break;
 290         case 88200:
 291                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
 292                                 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
 293                 break;
 294         case 19200:
 295                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
 296                                 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
 297                 break;
 298         case 17640:
 299                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
 300                                 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
 301                 break;
 302         default:
 303                 return -EINVAL;
 304         }
 305
 306         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
 307                                             TAS2770_TDM_CFG_REG0_SMP_MASK |
 308                                             TAS2770_TDM_CFG_REG0_31_MASK,
 309                                             ramp_rate_val);
 310         if (ret < 0)
 311                 return ret;
 312
 313         return 0;
 314 }
 315
 316 static int tas2770_hw_params(struct snd_pcm_substream *substream,
 317                              struct snd_pcm_hw_params *params,
 318                              struct snd_soc_dai *dai)
 319 {
 320         struct snd_soc_component *component = dai->component;
 321         struct tas2770_priv *tas2770 =
 322                         snd_soc_component_get_drvdata(component);
 323         int ret;
 324
 325         ret = tas2770_set_bitwidth(tas2770, params_format(params));
 326         if (ret)
 327                 return ret;
 328
 329         return tas2770_set_samplerate(tas2770, params_rate(params));
 330 }
 331
 332 static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 333 {
 334         struct snd_soc_component *component = dai->component;
 335         struct tas2770_priv *tas2770 =
 336                         snd_soc_component_get_drvdata(component);
 337         u8 tdm_rx_start_slot = 0, asi_cfg_1 = 0;
 338         int ret;
 339
 340         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 341         case SND_SOC_DAIFMT_CBS_CFS:
 342                 break;
 343         default:
 344                 dev_err(tas2770->dev, "ASI format master is not found\n");
 345                 return -EINVAL;
 346         }
 347
 348         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 349         case SND_SOC_DAIFMT_NB_NF:
 350                 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING;
 351                 break;
 352         case SND_SOC_DAIFMT_IB_NF:
 353                 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING;
 354                 break;
 355         default:
 356                 dev_err(tas2770->dev, "ASI format Inverse is not found\n");
 357                 return -EINVAL;
 358         }
 359
 360         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
 361                                             TAS2770_TDM_CFG_REG1_RX_MASK,
 362                                             asi_cfg_1);
 363         if (ret < 0)
 364                 return ret;
 365
 366         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 367         case SND_SOC_DAIFMT_I2S:
 368                 tdm_rx_start_slot = 1;
 369                 break;
 370         case SND_SOC_DAIFMT_DSP_A:
 371                 tdm_rx_start_slot = 0;
 372                 break;
 373         case SND_SOC_DAIFMT_DSP_B:
 374                 tdm_rx_start_slot = 1;
 375                 break;
 376         case SND_SOC_DAIFMT_LEFT_J:
 377                 tdm_rx_start_slot = 0;
 378                 break;
 379         default:
 380                 dev_err(tas2770->dev,
 381                         "DAI Format is not found, fmt=0x%x\n", fmt);
 382                 return -EINVAL;
 383         }
 384
 385         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
 386                                             TAS2770_TDM_CFG_REG1_MASK,
 387                                             (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT));
 388         if (ret < 0)
 389                 return ret;
 390
 391         return 0;
 392 }
 393
 394 static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai,
 395                                 unsigned int tx_mask,
 396                                 unsigned int rx_mask,
 397                                 int slots, int slot_width)
 398 {
 399         struct snd_soc_component *component = dai->component;
 400         int left_slot, right_slot;
 401         int ret;
 402
 403         if (tx_mask == 0 || rx_mask != 0)
 404                 return -EINVAL;
 405
 406         if (slots == 1) {
 407                 if (tx_mask != 1)
 408                         return -EINVAL;
 409
 410                 left_slot = 0;
 411                 right_slot = 0;
 412         } else {
 413                 left_slot = __ffs(tx_mask);
 414                 tx_mask &= ~(1 << left_slot);
 415                 if (tx_mask == 0) {
 416                         right_slot = left_slot;
 417                 } else {
 418                         right_slot = __ffs(tx_mask);
 419                         tx_mask &= ~(1 << right_slot);
 420                 }
 421         }
 422
 423         if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
 424                 return -EINVAL;
 425
 426         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
 427                                             TAS2770_TDM_CFG_REG3_30_MASK,
 428                                             (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT));
 429         if (ret < 0)
 430                 return ret;
 431         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
 432                                             TAS2770_TDM_CFG_REG3_RXS_MASK,
 433                                             (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT));
 434         if (ret < 0)
 435                 return ret;
 436
 437         switch (slot_width) {
 438         case 16:
 439                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 440                                                     TAS2770_TDM_CFG_REG2_RXS_MASK,
 441                                                     TAS2770_TDM_CFG_REG2_RXS_16BITS);
 442                 break;
 443         case 24:
 444                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 445                                                     TAS2770_TDM_CFG_REG2_RXS_MASK,
 446                                                     TAS2770_TDM_CFG_REG2_RXS_24BITS);
 447                 break;
 448         case 32:
 449                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 450                                                     TAS2770_TDM_CFG_REG2_RXS_MASK,
 451                                                     TAS2770_TDM_CFG_REG2_RXS_32BITS);
 452                 break;
 453         case 0:
 454                 /* Do not change slot width */
 455                 ret = 0;
 456                 break;
 457         default:
 458                 ret = -EINVAL;
 459         }
 460
 461         if (ret < 0)
 462                 return ret;
 463
 464         return 0;
 465 }
 466
 467 static struct snd_soc_dai_ops tas2770_dai_ops = {
 468         .mute_stream = tas2770_mute,
 469         .hw_params  = tas2770_hw_params,
 470         .set_fmt    = tas2770_set_fmt,
 471         .set_tdm_slot = tas2770_set_dai_tdm_slot,
 472         .no_capture_mute = 1,
 473 };
 474
 475 #define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 476                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 477
 478 #define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 479                                            SNDRV_PCM_RATE_96000 |\
 480                                             SNDRV_PCM_RATE_192000\
 481                                           )
 482
 483 static struct snd_soc_dai_driver tas2770_dai_driver[] = {
 484         {
 485                 .name = "tas2770 ASI1",
 486                 .id = 0,
 487                 .playback = {
 488                         .stream_name    = "ASI1 Playback",
 489                         .channels_min   = 2,
 490                         .channels_max   = 2,
 491                         .rates      = TAS2770_RATES,
 492                         .formats    = TAS2770_FORMATS,
 493                 },
 494                 .capture = {
 495                         .stream_name    = "ASI1 Capture",
 496                         .channels_min   = 0,
 497                         .channels_max   = 2,
 498                         .rates          = TAS2770_RATES,
 499                         .formats    = TAS2770_FORMATS,
 500                 },
 501                 .ops = &tas2770_dai_ops,
 502                 .symmetric_rates = 1,
 503         },
 504 };
 505
 506 static int tas2770_codec_probe(struct snd_soc_component *component)
 507 {
 508         struct tas2770_priv *tas2770 =
 509                         snd_soc_component_get_drvdata(component);
 510
 511         tas2770->component = component;
 512
 513         if (tas2770->sdz_gpio)
 514                 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
 515
 516         tas2770_reset(tas2770);
 517
 518         return 0;
 519 }
 520
 521 static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0);
 522 static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0);
 523
 524 static const struct snd_kcontrol_new tas2770_snd_controls[] = {
 525         SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2,
 526                        0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume),
 527         SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0,
 528                        tas2770_digital_tlv),
 529 };
 530
 531 static const struct snd_soc_component_driver soc_component_driver_tas2770 = {
 532         .probe                  = tas2770_codec_probe,
 533         .suspend                = tas2770_codec_suspend,
 534         .resume                 = tas2770_codec_resume,
 535         .set_bias_level = tas2770_set_bias_level,
 536         .controls               = tas2770_snd_controls,
 537         .num_controls           = ARRAY_SIZE(tas2770_snd_controls),
 538         .dapm_widgets           = tas2770_dapm_widgets,
 539         .num_dapm_widgets       = ARRAY_SIZE(tas2770_dapm_widgets),
 540         .dapm_routes            = tas2770_audio_map,
 541         .num_dapm_routes        = ARRAY_SIZE(tas2770_audio_map),
 542         .idle_bias_on           = 1,
 543         .endianness             = 1,
 544         .non_legacy_dai_naming  = 1,
 545 };
 546
 547 static int tas2770_register_codec(struct tas2770_priv *tas2770)
 548 {
 549         return devm_snd_soc_register_component(tas2770->dev,
 550                 &soc_component_driver_tas2770,
 551                 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver));
 552 }
 553
 554 static const struct reg_default tas2770_reg_defaults[] = {
 555         { TAS2770_PAGE, 0x00 },
 556         { TAS2770_SW_RST, 0x00 },
 557         { TAS2770_PWR_CTRL, 0x0e },
 558         { TAS2770_PLAY_CFG_REG0, 0x10 },
 559         { TAS2770_PLAY_CFG_REG1, 0x01 },
 560         { TAS2770_PLAY_CFG_REG2, 0x00 },
 561         { TAS2770_MSC_CFG_REG0, 0x07 },
 562         { TAS2770_TDM_CFG_REG1, 0x02 },
 563         { TAS2770_TDM_CFG_REG2, 0x0a },
 564         { TAS2770_TDM_CFG_REG3, 0x10 },
 565         { TAS2770_INT_MASK_REG0, 0xfc },
 566         { TAS2770_INT_MASK_REG1, 0xb1 },
 567         { TAS2770_INT_CFG, 0x05 },
 568         { TAS2770_MISC_IRQ, 0x81 },
 569         { TAS2770_CLK_CGF, 0x0c },
 570
 571 };
 572
 573 static bool tas2770_volatile(struct device *dev, unsigned int reg)
 574 {
 575         switch (reg) {
 576         case TAS2770_PAGE: /* regmap implementation requires this */
 577         case TAS2770_SW_RST: /* always clears after write */
 578         case TAS2770_BO_PRV_REG0:/* has a self clearing bit */
 579         case TAS2770_LVE_INT_REG0:
 580         case TAS2770_LVE_INT_REG1:
 581         case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */
 582         case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */
 583         case TAS2770_VBAT_MSB:
 584         case TAS2770_VBAT_LSB:
 585         case TAS2770_TEMP_MSB:
 586         case TAS2770_TEMP_LSB:
 587                 return true;
 588         }
 589
 590         return false;
 591 }
 592
 593 static bool tas2770_writeable(struct device *dev, unsigned int reg)
 594 {
 595         switch (reg) {
 596         case TAS2770_LVE_INT_REG0:
 597         case TAS2770_LVE_INT_REG1:
 598         case TAS2770_LAT_INT_REG0:
 599         case TAS2770_LAT_INT_REG1:
 600         case TAS2770_VBAT_MSB:
 601         case TAS2770_VBAT_LSB:
 602         case TAS2770_TEMP_MSB:
 603         case TAS2770_TEMP_LSB:
 604         case TAS2770_TDM_CLK_DETC:
 605         case TAS2770_REV_AND_GPID:
 606                 return false;
 607         }
 608
 609         return true;
 610 }
 611
 612 static const struct regmap_range_cfg tas2770_regmap_ranges[] = {
 613         {
 614                 .range_min = 0,
 615                 .range_max = 1 * 128,
 616                 .selector_reg = TAS2770_PAGE,
 617                 .selector_mask = 0xff,
 618                 .selector_shift = 0,
 619                 .window_start = 0,
 620                 .window_len = 128,
 621         },
 622 };
 623
 624 static const struct regmap_config tas2770_i2c_regmap = {
 625         .reg_bits = 8,
 626         .val_bits = 8,
 627         .writeable_reg = tas2770_writeable,
 628         .volatile_reg = tas2770_volatile,
 629         .reg_defaults = tas2770_reg_defaults,
 630         .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults),
 631         .cache_type = REGCACHE_RBTREE,
 632         .ranges = tas2770_regmap_ranges,
 633         .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges),
 634         .max_register = 1 * 128,
 635 };
 636
 637 static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770)
 638 {
 639         int rc = 0;
 640
 641         rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
 642                                       &tas2770->i_sense_slot);
 643         if (rc) {
 644                 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
 645                          "ti,imon-slot-no");
 646
 647                 tas2770->i_sense_slot = 0;
 648         }
 649
 650         rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
 651                                       &tas2770->v_sense_slot);
 652         if (rc) {
 653                 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
 654                          "ti,vmon-slot-no");
 655
 656                 tas2770->v_sense_slot = 2;
 657         }
 658
 659         tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
 660         if (IS_ERR(tas2770->sdz_gpio)) {
 661                 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)
 662                         return -EPROBE_DEFER;
 663
 664                 tas2770->sdz_gpio = NULL;
 665         }
 666
 667         return 0;
 668 }
 669
 670 static int tas2770_i2c_probe(struct i2c_client *client,
 671                         const struct i2c_device_id *id)
 672 {
 673         struct tas2770_priv *tas2770;
 674         int result;
 675
 676         tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv),
 677                                GFP_KERNEL);
 678         if (!tas2770)
 679                 return -ENOMEM;
 680
 681         tas2770->dev = &client->dev;
 682         i2c_set_clientdata(client, tas2770);
 683         dev_set_drvdata(&client->dev, tas2770);
 684
 685         tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap);
 686         if (IS_ERR(tas2770->regmap)) {
 687                 result = PTR_ERR(tas2770->regmap);
 688                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
 689                         result);
 690                 return result;
 691         }
 692
 693         if (client->dev.of_node) {
 694                 result = tas2770_parse_dt(&client->dev, tas2770);
 695                 if (result) {
 696                         dev_err(tas2770->dev, "%s: Failed to parse devicetree\n",
 697                                 __func__);
 698                         return result;
 699                 }
 700         }
 701
 702         tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset",
 703                                                       GPIOD_OUT_HIGH);
 704         if (IS_ERR(tas2770->reset_gpio)) {
 705                 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) {
 706                         tas2770->reset_gpio = NULL;
 707                         return -EPROBE_DEFER;
 708                 }
 709         }
 710
 711         result = tas2770_register_codec(tas2770);
 712         if (result)
 713                 dev_err(tas2770->dev, "Register codec failed.\n");
 714
 715         return result;
 716 }
 717
 718 static const struct i2c_device_id tas2770_i2c_id[] = {
 719         { "tas2770", 0},
 720         { }
 721 };
 722 MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id);
 723
 724 #if defined(CONFIG_OF)
 725 static const struct of_device_id tas2770_of_match[] = {
 726         { .compatible = "ti,tas2770" },
 727         {},
 728 };
 729 MODULE_DEVICE_TABLE(of, tas2770_of_match);
 730 #endif
 731
 732 static struct i2c_driver tas2770_i2c_driver = {
 733         .driver = {
 734                 .name   = "tas2770",
 735                 .of_match_table = of_match_ptr(tas2770_of_match),
 736         },
 737         .probe      = tas2770_i2c_probe,
 738         .id_table   = tas2770_i2c_id,
 739 };
 740 module_i2c_driver(tas2770_i2c_driver);
 741
 742 MODULE_AUTHOR("Shi Fu <[email protected]>");
 743 MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver");
 744 MODULE_LICENSE("GPL v2");