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                 usleep_range(1000, 2000);
  42         }
  43
  44         snd_soc_component_write(tas2770->component, TAS2770_SW_RST,
  45                 TAS2770_RST);
  46         usleep_range(1000, 2000);
  47 }
  48
  49 static int tas2770_set_bias_level(struct snd_soc_component *component,
  50                                  enum snd_soc_bias_level level)
  51 {
  52         struct tas2770_priv *tas2770 =
  53                         snd_soc_component_get_drvdata(component);
  54
  55         switch (level) {
  56         case SND_SOC_BIAS_ON:
  57                 snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
  58                                               TAS2770_PWR_CTRL_MASK,
  59                                               TAS2770_PWR_CTRL_ACTIVE);
  60                 break;
  61         case SND_SOC_BIAS_STANDBY:
  62         case SND_SOC_BIAS_PREPARE:
  63                 snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
  64                                               TAS2770_PWR_CTRL_MASK,
  65                                               TAS2770_PWR_CTRL_MUTE);
  66                 break;
  67         case SND_SOC_BIAS_OFF:
  68                 snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
  69                                               TAS2770_PWR_CTRL_MASK,
  70                                               TAS2770_PWR_CTRL_SHUTDOWN);
  71                 break;
  72
  73         default:
  74                 dev_err(tas2770->dev, "wrong power level setting %d\n", level);
  75                 return -EINVAL;
  76         }
  77
  78         return 0;
  79 }
  80
  81 #ifdef CONFIG_PM
  82 static int tas2770_codec_suspend(struct snd_soc_component *component)
  83 {
  84         struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
  85         int ret = 0;
  86
  87         regcache_cache_only(tas2770->regmap, true);
  88         regcache_mark_dirty(tas2770->regmap);
  89
  90         if (tas2770->sdz_gpio) {
  91                 gpiod_set_value_cansleep(tas2770->sdz_gpio, 0);
  92         } else {
  93                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
  94                                                     TAS2770_PWR_CTRL_MASK,
  95                                                     TAS2770_PWR_CTRL_SHUTDOWN);
  96                 if (ret < 0) {
  97                         regcache_cache_only(tas2770->regmap, false);
  98                         regcache_sync(tas2770->regmap);
  99                         return ret;
 100                 }
 101
 102                 ret = 0;
 103         }
 104
 105         return ret;
 106 }
 107
 108 static int tas2770_codec_resume(struct snd_soc_component *component)
 109 {
 110         struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
 111         int ret;
 112
 113         if (tas2770->sdz_gpio) {
 114                 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
 115                 usleep_range(1000, 2000);
 116         } else {
 117                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 118                                                     TAS2770_PWR_CTRL_MASK,
 119                                                     TAS2770_PWR_CTRL_ACTIVE);
 120                 if (ret < 0)
 121                         return ret;
 122         }
 123
 124         regcache_cache_only(tas2770->regmap, false);
 125
 126         return regcache_sync(tas2770->regmap);
 127 }
 128 #else
 129 #define tas2770_codec_suspend NULL
 130 #define tas2770_codec_resume NULL
 131 #endif
 132
 133 static const char * const tas2770_ASI1_src[] = {
 134         "I2C offset", "Left", "Right", "LeftRightDiv2",
 135 };
 136
 137 static SOC_ENUM_SINGLE_DECL(
 138         tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2,
 139         4, tas2770_ASI1_src);
 140
 141 static const struct snd_kcontrol_new tas2770_asi1_mux =
 142         SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum);
 143
 144 static int tas2770_dac_event(struct snd_soc_dapm_widget *w,
 145                              struct snd_kcontrol *kcontrol, int event)
 146 {
 147         struct snd_soc_component *component =
 148                         snd_soc_dapm_to_component(w->dapm);
 149         struct tas2770_priv *tas2770 =
 150                         snd_soc_component_get_drvdata(component);
 151         int ret;
 152
 153         switch (event) {
 154         case SND_SOC_DAPM_POST_PMU:
 155                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 156                                                     TAS2770_PWR_CTRL_MASK,
 157                                                     TAS2770_PWR_CTRL_MUTE);
 158                 break;
 159         case SND_SOC_DAPM_PRE_PMD:
 160                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 161                                                     TAS2770_PWR_CTRL_MASK,
 162                                                     TAS2770_PWR_CTRL_SHUTDOWN);
 163                 break;
 164         default:
 165                 dev_err(tas2770->dev, "Not supported evevt\n");
 166                 return -EINVAL;
 167         }
 168
 169         if (ret < 0)
 170                 return ret;
 171
 172         return 0;
 173 }
 174
 175 static const struct snd_kcontrol_new isense_switch =
 176         SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1);
 177 static const struct snd_kcontrol_new vsense_switch =
 178         SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1);
 179
 180 static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = {
 181         SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
 182         SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux),
 183         SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch),
 184         SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch),
 185         SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event,
 186                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 187         SND_SOC_DAPM_OUTPUT("OUT"),
 188         SND_SOC_DAPM_SIGGEN("VMON"),
 189         SND_SOC_DAPM_SIGGEN("IMON")
 190 };
 191
 192 static const struct snd_soc_dapm_route tas2770_audio_map[] = {
 193         {"ASI1 Sel", "I2C offset", "ASI1"},
 194         {"ASI1 Sel", "Left", "ASI1"},
 195         {"ASI1 Sel", "Right", "ASI1"},
 196         {"ASI1 Sel", "LeftRightDiv2", "ASI1"},
 197         {"DAC", NULL, "ASI1 Sel"},
 198         {"OUT", NULL, "DAC"},
 199         {"ISENSE", "Switch", "IMON"},
 200         {"VSENSE", "Switch", "VMON"},
 201 };
 202
 203 static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction)
 204 {
 205         struct snd_soc_component *component = dai->component;
 206         int ret;
 207
 208         if (mute)
 209                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 210                                                     TAS2770_PWR_CTRL_MASK,
 211                                                     TAS2770_PWR_CTRL_MUTE);
 212         else
 213                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 214                                                     TAS2770_PWR_CTRL_MASK,
 215                                                     TAS2770_PWR_CTRL_ACTIVE);
 216
 217         if (ret < 0)
 218                 return ret;
 219
 220         return 0;
 221 }
 222
 223 static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth)
 224 {
 225         int ret;
 226         struct snd_soc_component *component = tas2770->component;
 227
 228         switch (bitwidth) {
 229         case SNDRV_PCM_FORMAT_S16_LE:
 230                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 231                                                     TAS2770_TDM_CFG_REG2_RXW_MASK,
 232                                                     TAS2770_TDM_CFG_REG2_RXW_16BITS);
 233                 tas2770->v_sense_slot = tas2770->i_sense_slot + 2;
 234                 break;
 235         case SNDRV_PCM_FORMAT_S24_LE:
 236                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 237                                                     TAS2770_TDM_CFG_REG2_RXW_MASK,
 238                                                     TAS2770_TDM_CFG_REG2_RXW_24BITS);
 239                 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
 240                 break;
 241         case SNDRV_PCM_FORMAT_S32_LE:
 242                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 243                                                     TAS2770_TDM_CFG_REG2_RXW_MASK,
 244                                                     TAS2770_TDM_CFG_REG2_RXW_32BITS);
 245                 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
 246                 break;
 247
 248         default:
 249                 return -EINVAL;
 250         }
 251
 252         if (ret < 0)
 253                 return ret;
 254
 255         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5,
 256                                             TAS2770_TDM_CFG_REG5_VSNS_MASK |
 257                                             TAS2770_TDM_CFG_REG5_50_MASK,
 258                                             TAS2770_TDM_CFG_REG5_VSNS_ENABLE |
 259                 tas2770->v_sense_slot);
 260         if (ret < 0)
 261                 return ret;
 262
 263         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6,
 264                                             TAS2770_TDM_CFG_REG6_ISNS_MASK |
 265                                             TAS2770_TDM_CFG_REG6_50_MASK,
 266                                             TAS2770_TDM_CFG_REG6_ISNS_ENABLE |
 267                                             tas2770->i_sense_slot);
 268         if (ret < 0)
 269                 return ret;
 270
 271         return 0;
 272 }
 273
 274 static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate)
 275 {
 276         struct snd_soc_component *component = tas2770->component;
 277         int ramp_rate_val;
 278         int ret;
 279
 280         switch (samplerate) {
 281         case 48000:
 282                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
 283                                 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
 284                 break;
 285         case 44100:
 286                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
 287                                 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
 288                 break;
 289         case 96000:
 290                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
 291                                 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
 292                 break;
 293         case 88200:
 294                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
 295                                 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
 296                 break;
 297         case 192000:
 298                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
 299                                 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
 300                 break;
 301         case 176400:
 302                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
 303                                 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
 304                 break;
 305         default:
 306                 return -EINVAL;
 307         }
 308
 309         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
 310                                             TAS2770_TDM_CFG_REG0_SMP_MASK |
 311                                             TAS2770_TDM_CFG_REG0_31_MASK,
 312                                             ramp_rate_val);
 313         if (ret < 0)
 314                 return ret;
 315
 316         return 0;
 317 }
 318
 319 static int tas2770_hw_params(struct snd_pcm_substream *substream,
 320                              struct snd_pcm_hw_params *params,
 321                              struct snd_soc_dai *dai)
 322 {
 323         struct snd_soc_component *component = dai->component;
 324         struct tas2770_priv *tas2770 =
 325                         snd_soc_component_get_drvdata(component);
 326         int ret;
 327
 328         ret = tas2770_set_bitwidth(tas2770, params_format(params));
 329         if (ret)
 330                 return ret;
 331
 332         return tas2770_set_samplerate(tas2770, params_rate(params));
 333 }
 334
 335 static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 336 {
 337         struct snd_soc_component *component = dai->component;
 338         struct tas2770_priv *tas2770 =
 339                         snd_soc_component_get_drvdata(component);
 340         u8 tdm_rx_start_slot = 0, asi_cfg_1 = 0;
 341         int ret;
 342
 343         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 344         case SND_SOC_DAIFMT_CBS_CFS:
 345                 break;
 346         default:
 347                 dev_err(tas2770->dev, "ASI format master is not found\n");
 348                 return -EINVAL;
 349         }
 350
 351         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 352         case SND_SOC_DAIFMT_NB_NF:
 353                 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING;
 354                 break;
 355         case SND_SOC_DAIFMT_IB_NF:
 356                 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING;
 357                 break;
 358         default:
 359                 dev_err(tas2770->dev, "ASI format Inverse is not found\n");
 360                 return -EINVAL;
 361         }
 362
 363         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
 364                                             TAS2770_TDM_CFG_REG1_RX_MASK,
 365                                             asi_cfg_1);
 366         if (ret < 0)
 367                 return ret;
 368
 369         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 370         case SND_SOC_DAIFMT_I2S:
 371                 tdm_rx_start_slot = 1;
 372                 break;
 373         case SND_SOC_DAIFMT_DSP_A:
 374                 tdm_rx_start_slot = 0;
 375                 break;
 376         case SND_SOC_DAIFMT_DSP_B:
 377                 tdm_rx_start_slot = 1;
 378                 break;
 379         case SND_SOC_DAIFMT_LEFT_J:
 380                 tdm_rx_start_slot = 0;
 381                 break;
 382         default:
 383                 dev_err(tas2770->dev,
 384                         "DAI Format is not found, fmt=0x%x\n", fmt);
 385                 return -EINVAL;
 386         }
 387
 388         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
 389                                             TAS2770_TDM_CFG_REG1_MASK,
 390                                             (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT));
 391         if (ret < 0)
 392                 return ret;
 393
 394         return 0;
 395 }
 396
 397 static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai,
 398                                 unsigned int tx_mask,
 399                                 unsigned int rx_mask,
 400                                 int slots, int slot_width)
 401 {
 402         struct snd_soc_component *component = dai->component;
 403         int left_slot, right_slot;
 404         int ret;
 405
 406         if (tx_mask == 0 || rx_mask != 0)
 407                 return -EINVAL;
 408
 409         if (slots == 1) {
 410                 if (tx_mask != 1)
 411                         return -EINVAL;
 412
 413                 left_slot = 0;
 414                 right_slot = 0;
 415         } else {
 416                 left_slot = __ffs(tx_mask);
 417                 tx_mask &= ~(1 << left_slot);
 418                 if (tx_mask == 0) {
 419                         right_slot = left_slot;
 420                 } else {
 421                         right_slot = __ffs(tx_mask);
 422                         tx_mask &= ~(1 << right_slot);
 423                 }
 424         }
 425
 426         if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
 427                 return -EINVAL;
 428
 429         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
 430                                             TAS2770_TDM_CFG_REG3_30_MASK,
 431                                             (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT));
 432         if (ret < 0)
 433                 return ret;
 434         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
 435                                             TAS2770_TDM_CFG_REG3_RXS_MASK,
 436                                             (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT));
 437         if (ret < 0)
 438                 return ret;
 439
 440         switch (slot_width) {
 441         case 16:
 442                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 443                                                     TAS2770_TDM_CFG_REG2_RXS_MASK,
 444                                                     TAS2770_TDM_CFG_REG2_RXS_16BITS);
 445                 break;
 446         case 24:
 447                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 448                                                     TAS2770_TDM_CFG_REG2_RXS_MASK,
 449                                                     TAS2770_TDM_CFG_REG2_RXS_24BITS);
 450                 break;
 451         case 32:
 452                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
 453                                                     TAS2770_TDM_CFG_REG2_RXS_MASK,
 454                                                     TAS2770_TDM_CFG_REG2_RXS_32BITS);
 455                 break;
 456         case 0:
 457                 /* Do not change slot width */
 458                 ret = 0;
 459                 break;
 460         default:
 461                 ret = -EINVAL;
 462         }
 463
 464         if (ret < 0)
 465                 return ret;
 466
 467         return 0;
 468 }
 469
 470 static const struct snd_soc_dai_ops tas2770_dai_ops = {
 471         .mute_stream = tas2770_mute,
 472         .hw_params  = tas2770_hw_params,
 473         .set_fmt    = tas2770_set_fmt,
 474         .set_tdm_slot = tas2770_set_dai_tdm_slot,
 475         .no_capture_mute = 1,
 476 };
 477
 478 #define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 479                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 480
 481 #define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 482                                            SNDRV_PCM_RATE_96000 |\
 483                                             SNDRV_PCM_RATE_192000\
 484                                           )
 485
 486 static struct snd_soc_dai_driver tas2770_dai_driver[] = {
 487         {
 488                 .name = "tas2770 ASI1",
 489                 .id = 0,
 490                 .playback = {
 491                         .stream_name    = "ASI1 Playback",
 492                         .channels_min   = 2,
 493                         .channels_max   = 2,
 494                         .rates      = TAS2770_RATES,
 495                         .formats    = TAS2770_FORMATS,
 496                 },
 497                 .capture = {
 498                         .stream_name    = "ASI1 Capture",
 499                         .channels_min   = 0,
 500                         .channels_max   = 2,
 501                         .rates          = TAS2770_RATES,
 502                         .formats    = TAS2770_FORMATS,
 503                 },
 504                 .ops = &tas2770_dai_ops,
 505                 .symmetric_rate = 1,
 506         },
 507 };
 508
 509 static int tas2770_codec_probe(struct snd_soc_component *component)
 510 {
 511         struct tas2770_priv *tas2770 =
 512                         snd_soc_component_get_drvdata(component);
 513
 514         tas2770->component = component;
 515
 516         if (tas2770->sdz_gpio) {
 517                 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
 518                 usleep_range(1000, 2000);
 519         }
 520
 521         tas2770_reset(tas2770);
 522
 523         return 0;
 524 }
 525
 526 static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0);
 527 static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0);
 528
 529 static const struct snd_kcontrol_new tas2770_snd_controls[] = {
 530         SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2,
 531                        0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume),
 532         SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0,
 533                        tas2770_digital_tlv),
 534 };
 535
 536 static const struct snd_soc_component_driver soc_component_driver_tas2770 = {
 537         .probe                  = tas2770_codec_probe,
 538         .suspend                = tas2770_codec_suspend,
 539         .resume                 = tas2770_codec_resume,
 540         .set_bias_level = tas2770_set_bias_level,
 541         .controls               = tas2770_snd_controls,
 542         .num_controls           = ARRAY_SIZE(tas2770_snd_controls),
 543         .dapm_widgets           = tas2770_dapm_widgets,
 544         .num_dapm_widgets       = ARRAY_SIZE(tas2770_dapm_widgets),
 545         .dapm_routes            = tas2770_audio_map,
 546         .num_dapm_routes        = ARRAY_SIZE(tas2770_audio_map),
 547         .idle_bias_on           = 1,
 548         .endianness             = 1,
 549         .non_legacy_dai_naming  = 1,
 550 };
 551
 552 static int tas2770_register_codec(struct tas2770_priv *tas2770)
 553 {
 554         return devm_snd_soc_register_component(tas2770->dev,
 555                 &soc_component_driver_tas2770,
 556                 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver));
 557 }
 558
 559 static const struct reg_default tas2770_reg_defaults[] = {
 560         { TAS2770_PAGE, 0x00 },
 561         { TAS2770_SW_RST, 0x00 },
 562         { TAS2770_PWR_CTRL, 0x0e },
 563         { TAS2770_PLAY_CFG_REG0, 0x10 },
 564         { TAS2770_PLAY_CFG_REG1, 0x01 },
 565         { TAS2770_PLAY_CFG_REG2, 0x00 },
 566         { TAS2770_MSC_CFG_REG0, 0x07 },
 567         { TAS2770_TDM_CFG_REG1, 0x02 },
 568         { TAS2770_TDM_CFG_REG2, 0x0a },
 569         { TAS2770_TDM_CFG_REG3, 0x10 },
 570         { TAS2770_INT_MASK_REG0, 0xfc },
 571         { TAS2770_INT_MASK_REG1, 0xb1 },
 572         { TAS2770_INT_CFG, 0x05 },
 573         { TAS2770_MISC_IRQ, 0x81 },
 574         { TAS2770_CLK_CGF, 0x0c },
 575
 576 };
 577
 578 static bool tas2770_volatile(struct device *dev, unsigned int reg)
 579 {
 580         switch (reg) {
 581         case TAS2770_PAGE: /* regmap implementation requires this */
 582         case TAS2770_SW_RST: /* always clears after write */
 583         case TAS2770_BO_PRV_REG0:/* has a self clearing bit */
 584         case TAS2770_LVE_INT_REG0:
 585         case TAS2770_LVE_INT_REG1:
 586         case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */
 587         case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */
 588         case TAS2770_VBAT_MSB:
 589         case TAS2770_VBAT_LSB:
 590         case TAS2770_TEMP_MSB:
 591         case TAS2770_TEMP_LSB:
 592                 return true;
 593         }
 594
 595         return false;
 596 }
 597
 598 static bool tas2770_writeable(struct device *dev, unsigned int reg)
 599 {
 600         switch (reg) {
 601         case TAS2770_LVE_INT_REG0:
 602         case TAS2770_LVE_INT_REG1:
 603         case TAS2770_LAT_INT_REG0:
 604         case TAS2770_LAT_INT_REG1:
 605         case TAS2770_VBAT_MSB:
 606         case TAS2770_VBAT_LSB:
 607         case TAS2770_TEMP_MSB:
 608         case TAS2770_TEMP_LSB:
 609         case TAS2770_TDM_CLK_DETC:
 610         case TAS2770_REV_AND_GPID:
 611                 return false;
 612         }
 613
 614         return true;
 615 }
 616
 617 static const struct regmap_range_cfg tas2770_regmap_ranges[] = {
 618         {
 619                 .range_min = 0,
 620                 .range_max = 1 * 128,
 621                 .selector_reg = TAS2770_PAGE,
 622                 .selector_mask = 0xff,
 623                 .selector_shift = 0,
 624                 .window_start = 0,
 625                 .window_len = 128,
 626         },
 627 };
 628
 629 static const struct regmap_config tas2770_i2c_regmap = {
 630         .reg_bits = 8,
 631         .val_bits = 8,
 632         .writeable_reg = tas2770_writeable,
 633         .volatile_reg = tas2770_volatile,
 634         .reg_defaults = tas2770_reg_defaults,
 635         .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults),
 636         .cache_type = REGCACHE_RBTREE,
 637         .ranges = tas2770_regmap_ranges,
 638         .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges),
 639         .max_register = 1 * 128,
 640 };
 641
 642 static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770)
 643 {
 644         int rc = 0;
 645
 646         rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
 647                                       &tas2770->i_sense_slot);
 648         if (rc) {
 649                 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
 650                          "ti,imon-slot-no");
 651
 652                 tas2770->i_sense_slot = 0;
 653         }
 654
 655         rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
 656                                       &tas2770->v_sense_slot);
 657         if (rc) {
 658                 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
 659                          "ti,vmon-slot-no");
 660
 661                 tas2770->v_sense_slot = 2;
 662         }
 663
 664         tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
 665         if (IS_ERR(tas2770->sdz_gpio)) {
 666                 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)
 667                         return -EPROBE_DEFER;
 668
 669                 tas2770->sdz_gpio = NULL;
 670         }
 671
 672         return 0;
 673 }
 674
 675 static int tas2770_i2c_probe(struct i2c_client *client)
 676 {
 677         struct tas2770_priv *tas2770;
 678         int result;
 679
 680         tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv),
 681                                GFP_KERNEL);
 682         if (!tas2770)
 683                 return -ENOMEM;
 684
 685         tas2770->dev = &client->dev;
 686         i2c_set_clientdata(client, tas2770);
 687         dev_set_drvdata(&client->dev, tas2770);
 688
 689         tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap);
 690         if (IS_ERR(tas2770->regmap)) {
 691                 result = PTR_ERR(tas2770->regmap);
 692                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
 693                         result);
 694                 return result;
 695         }
 696
 697         if (client->dev.of_node) {
 698                 result = tas2770_parse_dt(&client->dev, tas2770);
 699                 if (result) {
 700                         dev_err(tas2770->dev, "%s: Failed to parse devicetree\n",
 701                                 __func__);
 702                         return result;
 703                 }
 704         }
 705
 706         tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset",
 707                                                       GPIOD_OUT_HIGH);
 708         if (IS_ERR(tas2770->reset_gpio)) {
 709                 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) {
 710                         tas2770->reset_gpio = NULL;
 711                         return -EPROBE_DEFER;
 712                 }
 713         }
 714
 715         result = tas2770_register_codec(tas2770);
 716         if (result)
 717                 dev_err(tas2770->dev, "Register codec failed.\n");
 718
 719         return result;
 720 }
 721
 722 static const struct i2c_device_id tas2770_i2c_id[] = {
 723         { "tas2770", 0},
 724         { }
 725 };
 726 MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id);
 727
 728 #if defined(CONFIG_OF)
 729 static const struct of_device_id tas2770_of_match[] = {
 730         { .compatible = "ti,tas2770" },
 731         {},
 732 };
 733 MODULE_DEVICE_TABLE(of, tas2770_of_match);
 734 #endif
 735
 736 static struct i2c_driver tas2770_i2c_driver = {
 737         .driver = {
 738                 .name   = "tas2770",
 739                 .of_match_table = of_match_ptr(tas2770_of_match),
 740         },
 741         .probe_new  = tas2770_i2c_probe,
 742         .id_table   = tas2770_i2c_id,
 743 };
 744 module_i2c_driver(tas2770_i2c_driver);
 745
 746 MODULE_AUTHOR("Shi Fu <[email protected]>");
 747 MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver");
 748 MODULE_LICENSE("GPL v2");