sound/soc/codecs/tas5720.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * tas5720.c - ALSA SoC Texas Instruments TAS5720 Mono Audio Amplifier
   4  *
   5  * Copyright (C)2015-2016 Texas Instruments Incorporated -  https://www.ti.com
   6  *
   7  * Author: Andreas Dannenberg <dannenberg@ti.com>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/errno.h>
  12 #include <linux/device.h>
  13 #include <linux/i2c.h>
  14 #include <linux/regmap.h>
  15 #include <linux/slab.h>
  16 #include <linux/regulator/consumer.h>
  17 #include <linux/delay.h>
  18
  19 #include <sound/pcm.h>
  20 #include <sound/pcm_params.h>
  21 #include <sound/soc.h>
  22 #include <sound/soc-dapm.h>
  23 #include <sound/tlv.h>
  24
  25 #include "tas5720.h"
  26
  27 /* Define how often to check (and clear) the fault status register (in ms) */
  28 #define TAS5720_FAULT_CHECK_INTERVAL            200
  29
  30 enum tas572x_type {
  31         TAS5720,
  32         TAS5720A_Q1,
  33         TAS5722,
  34 };
  35
  36 static const char * const tas5720_supply_names[] = {
  37         "dvdd",         /* Digital power supply. Connect to 3.3-V supply. */
  38         "pvdd",         /* Class-D amp and analog power supply (connected). */
  39 };
  40
  41 #define TAS5720_NUM_SUPPLIES    ARRAY_SIZE(tas5720_supply_names)
  42
  43 struct tas5720_data {
  44         struct snd_soc_component *component;
  45         struct regmap *regmap;
  46         struct i2c_client *tas5720_client;
  47         enum tas572x_type devtype;
  48         struct regulator_bulk_data supplies[TAS5720_NUM_SUPPLIES];
  49         struct delayed_work fault_check_work;
  50         unsigned int last_fault;
  51 };
  52
  53 static int tas5720_hw_params(struct snd_pcm_substream *substream,
  54                              struct snd_pcm_hw_params *params,
  55                              struct snd_soc_dai *dai)
  56 {
  57         struct snd_soc_component *component = dai->component;
  58         unsigned int rate = params_rate(params);
  59         bool ssz_ds;
  60         int ret;
  61
  62         switch (rate) {
  63         case 44100:
  64         case 48000:
  65                 ssz_ds = false;
  66                 break;
  67         case 88200:
  68         case 96000:
  69                 ssz_ds = true;
  70                 break;
  71         default:
  72                 dev_err(component->dev, "unsupported sample rate: %u\n", rate);
  73                 return -EINVAL;
  74         }
  75
  76         ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL1_REG,
  77                                   TAS5720_SSZ_DS, ssz_ds);
  78         if (ret < 0) {
  79                 dev_err(component->dev, "error setting sample rate: %d\n", ret);
  80                 return ret;
  81         }
  82
  83         return 0;
  84 }
  85
  86 static int tas5720_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
  87 {
  88         struct snd_soc_component *component = dai->component;
  89         u8 serial_format;
  90         int ret;
  91
  92         if ((fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != SND_SOC_DAIFMT_CBC_CFC) {
  93                 dev_vdbg(component->dev, "DAI clocking invalid\n");
  94                 return -EINVAL;
  95         }
  96
  97         switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
  98                        SND_SOC_DAIFMT_INV_MASK)) {
  99         case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF):
 100                 /* 1st data bit occur one BCLK cycle after the frame sync */
 101                 serial_format = TAS5720_SAIF_I2S;
 102                 break;
 103         case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF):
 104                 /*
 105                  * Note that although the TAS5720 does not have a dedicated DSP
 106                  * mode it doesn't care about the LRCLK duty cycle during TDM
 107                  * operation. Therefore we can use the device's I2S mode with
 108                  * its delaying of the 1st data bit to receive DSP_A formatted
 109                  * data. See device datasheet for additional details.
 110                  */
 111                 serial_format = TAS5720_SAIF_I2S;
 112                 break;
 113         case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF):
 114                 /*
 115                  * Similar to DSP_A, we can use the fact that the TAS5720 does
 116                  * not care about the LRCLK duty cycle during TDM to receive
 117                  * DSP_B formatted data in LEFTJ mode (no delaying of the 1st
 118                  * data bit).
 119                  */
 120                 serial_format = TAS5720_SAIF_LEFTJ;
 121                 break;
 122         case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF):
 123                 /* No delay after the frame sync */
 124                 serial_format = TAS5720_SAIF_LEFTJ;
 125                 break;
 126         default:
 127                 dev_vdbg(component->dev, "DAI Format is not found\n");
 128                 return -EINVAL;
 129         }
 130
 131         ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL1_REG,
 132                                   TAS5720_SAIF_FORMAT_MASK,
 133                                   serial_format);
 134         if (ret < 0) {
 135                 dev_err(component->dev, "error setting SAIF format: %d\n", ret);
 136                 return ret;
 137         }
 138
 139         return 0;
 140 }
 141
 142 static int tas5720_set_dai_tdm_slot(struct snd_soc_dai *dai,
 143                                     unsigned int tx_mask, unsigned int rx_mask,
 144                                     int slots, int slot_width)
 145 {
 146         struct snd_soc_component *component = dai->component;
 147         struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
 148         unsigned int first_slot;
 149         int ret;
 150
 151         if (!tx_mask) {
 152                 dev_err(component->dev, "tx masks must not be 0\n");
 153                 return -EINVAL;
 154         }
 155
 156         /*
 157          * Determine the first slot that is being requested. We will only
 158          * use the first slot that is found since the TAS5720 is a mono
 159          * amplifier.
 160          */
 161         first_slot = __ffs(tx_mask);
 162
 163         if (first_slot > 7) {
 164                 dev_err(component->dev, "slot selection out of bounds (%u)\n",
 165                         first_slot);
 166                 return -EINVAL;
 167         }
 168
 169         /*
 170          * Enable manual TDM slot selection (instead of I2C ID based).
 171          * This is not applicable to TAS5720A-Q1.
 172          */
 173         switch (tas5720->devtype) {
 174         case TAS5720A_Q1:
 175                 break;
 176         default:
 177                 ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL1_REG,
 178                                           TAS5720_TDM_CFG_SRC, TAS5720_TDM_CFG_SRC);
 179                 if (ret < 0)
 180                         goto error_snd_soc_component_update_bits;
 181
 182                 /* Configure the TDM slot to process audio from */
 183                 ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL2_REG,
 184                                           TAS5720_TDM_SLOT_SEL_MASK, first_slot);
 185                 if (ret < 0)
 186                         goto error_snd_soc_component_update_bits;
 187                 break;
 188         }
 189
 190         /* Configure TDM slot width. This is only applicable to TAS5722. */
 191         switch (tas5720->devtype) {
 192         case TAS5722:
 193                 ret = snd_soc_component_update_bits(component, TAS5722_DIGITAL_CTRL2_REG,
 194                                                     TAS5722_TDM_SLOT_16B,
 195                                                     slot_width == 16 ?
 196                                                     TAS5722_TDM_SLOT_16B : 0);
 197                 if (ret < 0)
 198                         goto error_snd_soc_component_update_bits;
 199                 break;
 200         default:
 201                 break;
 202         }
 203
 204         return 0;
 205
 206 error_snd_soc_component_update_bits:
 207         dev_err(component->dev, "error configuring TDM mode: %d\n", ret);
 208         return ret;
 209 }
 210
 211 static int tas5720_mute_soc_component(struct snd_soc_component *component, int mute)
 212 {
 213         struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
 214         unsigned int reg, mask;
 215         int ret;
 216
 217         switch (tas5720->devtype) {
 218         case TAS5720A_Q1:
 219                 reg = TAS5720_Q1_VOLUME_CTRL_CFG_REG;
 220                 mask = TAS5720_Q1_MUTE;
 221                 break;
 222         default:
 223                 reg = TAS5720_DIGITAL_CTRL2_REG;
 224                 mask = TAS5720_MUTE;
 225                 break;
 226         }
 227
 228         ret = snd_soc_component_update_bits(component, reg, mask, mute ? mask : 0);
 229         if (ret < 0) {
 230                 dev_err(component->dev, "error (un-)muting device: %d\n", ret);
 231                 return ret;
 232         }
 233
 234         return 0;
 235 }
 236
 237 static int tas5720_mute(struct snd_soc_dai *dai, int mute, int direction)
 238 {
 239         return tas5720_mute_soc_component(dai->component, mute);
 240 }
 241
 242 static void tas5720_fault_check_work(struct work_struct *work)
 243 {
 244         struct tas5720_data *tas5720 = container_of(work, struct tas5720_data,
 245                         fault_check_work.work);
 246         struct device *dev = tas5720->component->dev;
 247         unsigned int curr_fault;
 248         int ret;
 249
 250         ret = regmap_read(tas5720->regmap, TAS5720_FAULT_REG, &curr_fault);
 251         if (ret < 0) {
 252                 dev_err(dev, "failed to read FAULT register: %d\n", ret);
 253                 goto out;
 254         }
 255
 256         /* Check/handle all errors except SAIF clock errors */
 257         curr_fault &= TAS5720_OCE | TAS5720_DCE | TAS5720_OTE;
 258
 259         /*
 260          * Only flag errors once for a given occurrence. This is needed as
 261          * the TAS5720 will take time clearing the fault condition internally
 262          * during which we don't want to bombard the system with the same
 263          * error message over and over.
 264          */
 265         if ((curr_fault & TAS5720_OCE) && !(tas5720->last_fault & TAS5720_OCE))
 266                 dev_crit(dev, "experienced an over current hardware fault\n");
 267
 268         if ((curr_fault & TAS5720_DCE) && !(tas5720->last_fault & TAS5720_DCE))
 269                 dev_crit(dev, "experienced a DC detection fault\n");
 270
 271         if ((curr_fault & TAS5720_OTE) && !(tas5720->last_fault & TAS5720_OTE))
 272                 dev_crit(dev, "experienced an over temperature fault\n");
 273
 274         /* Store current fault value so we can detect any changes next time */
 275         tas5720->last_fault = curr_fault;
 276
 277         if (!curr_fault)
 278                 goto out;
 279
 280         /*
 281          * Periodically toggle SDZ (shutdown bit) H->L->H to clear any latching
 282          * faults as long as a fault condition persists. Always going through
 283          * the full sequence no matter the first return value to minimizes
 284          * chances for the device to end up in shutdown mode.
 285          */
 286         ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG,
 287                                 TAS5720_SDZ, 0);
 288         if (ret < 0)
 289                 dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret);
 290
 291         ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG,
 292                                 TAS5720_SDZ, TAS5720_SDZ);
 293         if (ret < 0)
 294                 dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret);
 295
 296 out:
 297         /* Schedule the next fault check at the specified interval */
 298         schedule_delayed_work(&tas5720->fault_check_work,
 299                               msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL));
 300 }
 301
 302 static int tas5720_codec_probe(struct snd_soc_component *component)
 303 {
 304         struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
 305         unsigned int device_id, expected_device_id;
 306         int ret;
 307
 308         tas5720->component = component;
 309
 310         ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies),
 311                                     tas5720->supplies);
 312         if (ret != 0) {
 313                 dev_err(component->dev, "failed to enable supplies: %d\n", ret);
 314                 return ret;
 315         }
 316
 317         /*
 318          * Take a liberal approach to checking the device ID to allow the
 319          * driver to be used even if the device ID does not match, however
 320          * issue a warning if there is a mismatch.
 321          */
 322         ret = regmap_read(tas5720->regmap, TAS5720_DEVICE_ID_REG, &device_id);
 323         if (ret < 0) {
 324                 dev_err(component->dev, "failed to read device ID register: %d\n",
 325                         ret);
 326                 goto probe_fail;
 327         }
 328
 329         switch (tas5720->devtype) {
 330         case TAS5720:
 331                 expected_device_id = TAS5720_DEVICE_ID;
 332                 break;
 333         case TAS5720A_Q1:
 334                 expected_device_id = TAS5720A_Q1_DEVICE_ID;
 335                 break;
 336         case TAS5722:
 337                 expected_device_id = TAS5722_DEVICE_ID;
 338                 break;
 339         default:
 340                 dev_err(component->dev, "unexpected private driver data\n");
 341                 ret = -EINVAL;
 342                 goto probe_fail;
 343         }
 344
 345         if (device_id != expected_device_id)
 346                 dev_warn(component->dev, "wrong device ID. expected: %u read: %u\n",
 347                          expected_device_id, device_id);
 348
 349         /* Set device to mute */
 350         ret = tas5720_mute_soc_component(component, 1);
 351         if (ret < 0)
 352                 goto error_snd_soc_component_update_bits;
 353
 354         /* Set Bit 7 in TAS5720_ANALOG_CTRL_REG to 1 for TAS5720A_Q1 */
 355         switch (tas5720->devtype) {
 356         case TAS5720A_Q1:
 357                 ret = snd_soc_component_update_bits(component, TAS5720_ANALOG_CTRL_REG,
 358                                                     TAS5720_Q1_RESERVED7_BIT,
 359                                                     TAS5720_Q1_RESERVED7_BIT);
 360                 break;
 361         default:
 362                 break;
 363         }
 364         if (ret < 0)
 365                 goto error_snd_soc_component_update_bits;
 366
 367         /*
 368          * Enter shutdown mode - our default when not playing audio - to
 369          * minimize current consumption. On the TAS5720 there is no real down
 370          * side doing so as all device registers are preserved and the wakeup
 371          * of the codec is rather quick which we do using a dapm widget.
 372          */
 373         ret = snd_soc_component_update_bits(component, TAS5720_POWER_CTRL_REG,
 374                                   TAS5720_SDZ, 0);
 375         if (ret < 0)
 376                 goto error_snd_soc_component_update_bits;
 377
 378         INIT_DELAYED_WORK(&tas5720->fault_check_work, tas5720_fault_check_work);
 379
 380         return 0;
 381
 382 error_snd_soc_component_update_bits:
 383         dev_err(component->dev, "error configuring device registers: %d\n", ret);
 384
 385 probe_fail:
 386         regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
 387                                tas5720->supplies);
 388         return ret;
 389 }
 390
 391 static void tas5720_codec_remove(struct snd_soc_component *component)
 392 {
 393         struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
 394         int ret;
 395
 396         cancel_delayed_work_sync(&tas5720->fault_check_work);
 397
 398         ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
 399                                      tas5720->supplies);
 400         if (ret < 0)
 401                 dev_err(component->dev, "failed to disable supplies: %d\n", ret);
 402 };
 403
 404 static int tas5720_dac_event(struct snd_soc_dapm_widget *w,
 405                              struct snd_kcontrol *kcontrol, int event)
 406 {
 407         struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
 408         struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
 409         int ret;
 410
 411         if (event & SND_SOC_DAPM_POST_PMU) {
 412                 /* Take TAS5720 out of shutdown mode */
 413                 ret = snd_soc_component_update_bits(component, TAS5720_POWER_CTRL_REG,
 414                                           TAS5720_SDZ, TAS5720_SDZ);
 415                 if (ret < 0) {
 416                         dev_err(component->dev, "error waking component: %d\n", ret);
 417                         return ret;
 418                 }
 419
 420                 /*
 421                  * Observe codec shutdown-to-active time. The datasheet only
 422                  * lists a nominal value however just use-it as-is without
 423                  * additional padding to minimize the delay introduced in
 424                  * starting to play audio (actually there is other setup done
 425                  * by the ASoC framework that will provide additional delays,
 426                  * so we should always be safe).
 427                  */
 428                 msleep(25);
 429
 430                 /* Turn on TAS5720 periodic fault checking/handling */
 431                 tas5720->last_fault = 0;
 432                 schedule_delayed_work(&tas5720->fault_check_work,
 433                                 msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL));
 434         } else if (event & SND_SOC_DAPM_PRE_PMD) {
 435                 /* Disable TAS5720 periodic fault checking/handling */
 436                 cancel_delayed_work_sync(&tas5720->fault_check_work);
 437
 438                 /* Place TAS5720 in shutdown mode to minimize current draw */
 439                 ret = snd_soc_component_update_bits(component, TAS5720_POWER_CTRL_REG,
 440                                           TAS5720_SDZ, 0);
 441                 if (ret < 0) {
 442                         dev_err(component->dev, "error shutting down component: %d\n",
 443                                 ret);
 444                         return ret;
 445                 }
 446         }
 447
 448         return 0;
 449 }
 450
 451 #ifdef CONFIG_PM
 452 static int tas5720_suspend(struct snd_soc_component *component)
 453 {
 454         struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
 455         int ret;
 456
 457         regcache_cache_only(tas5720->regmap, true);
 458         regcache_mark_dirty(tas5720->regmap);
 459
 460         ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
 461                                      tas5720->supplies);
 462         if (ret < 0)
 463                 dev_err(component->dev, "failed to disable supplies: %d\n", ret);
 464
 465         return ret;
 466 }
 467
 468 static int tas5720_resume(struct snd_soc_component *component)
 469 {
 470         struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
 471         int ret;
 472
 473         ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies),
 474                                     tas5720->supplies);
 475         if (ret < 0) {
 476                 dev_err(component->dev, "failed to enable supplies: %d\n", ret);
 477                 return ret;
 478         }
 479
 480         regcache_cache_only(tas5720->regmap, false);
 481
 482         ret = regcache_sync(tas5720->regmap);
 483         if (ret < 0) {
 484                 dev_err(component->dev, "failed to sync regcache: %d\n", ret);
 485                 return ret;
 486         }
 487
 488         return 0;
 489 }
 490 #else
 491 #define tas5720_suspend NULL
 492 #define tas5720_resume NULL
 493 #endif
 494
 495 static bool tas5720_is_volatile_reg(struct device *dev, unsigned int reg)
 496 {
 497         switch (reg) {
 498         case TAS5720_DEVICE_ID_REG:
 499         case TAS5720_FAULT_REG:
 500                 return true;
 501         default:
 502                 return false;
 503         }
 504 }
 505
 506 static const struct regmap_config tas5720_regmap_config = {
 507         .reg_bits = 8,
 508         .val_bits = 8,
 509
 510         .max_register = TAS5720_MAX_REG,
 511         .cache_type = REGCACHE_RBTREE,
 512         .volatile_reg = tas5720_is_volatile_reg,
 513 };
 514
 515 static const struct regmap_config tas5720a_q1_regmap_config = {
 516         .reg_bits = 8,
 517         .val_bits = 8,
 518
 519         .max_register = TAS5720_MAX_REG,
 520         .cache_type = REGCACHE_RBTREE,
 521         .volatile_reg = tas5720_is_volatile_reg,
 522 };
 523
 524 static const struct regmap_config tas5722_regmap_config = {
 525         .reg_bits = 8,
 526         .val_bits = 8,
 527
 528         .max_register = TAS5722_MAX_REG,
 529         .cache_type = REGCACHE_RBTREE,
 530         .volatile_reg = tas5720_is_volatile_reg,
 531 };
 532
 533 /*
 534  * DAC analog gain. There are four discrete values to select from, ranging
 535  * from 19.2 dB to 26.3dB.
 536  */
 537 static const DECLARE_TLV_DB_RANGE(dac_analog_tlv,
 538         0x0, 0x0, TLV_DB_SCALE_ITEM(1920, 0, 0),
 539         0x1, 0x1, TLV_DB_SCALE_ITEM(2070, 0, 0),
 540         0x2, 0x2, TLV_DB_SCALE_ITEM(2350, 0, 0),
 541         0x3, 0x3, TLV_DB_SCALE_ITEM(2630, 0, 0),
 542 );
 543
 544 /*
 545  * DAC analog gain for TAS5720A-Q1. There are three discrete values to select from, ranging
 546  * from 19.2 dB to 25.0dB.
 547  */
 548 static const DECLARE_TLV_DB_RANGE(dac_analog_tlv_a_q1,
 549         0x0, 0x0, TLV_DB_SCALE_ITEM(1920, 0, 0),
 550         0x1, 0x1, TLV_DB_SCALE_ITEM(2260, 0, 0),
 551         0x2, 0x2, TLV_DB_SCALE_ITEM(2500, 0, 0),
 552 );
 553
 554 /*
 555  * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB or 0.25 dB steps
 556  * depending on the device. Note that setting the gain below -100 dB
 557  * (register value <0x7) is effectively a MUTE as per device datasheet.
 558  *
 559  * Note that for the TAS5722 the digital volume controls are actually split
 560  * over two registers, so we need custom getters/setters for access.
 561  */
 562 static DECLARE_TLV_DB_SCALE(tas5720_dac_tlv, -10350, 50, 0);
 563 static DECLARE_TLV_DB_SCALE(tas5722_dac_tlv, -10350, 25, 0);
 564
 565 static int tas5722_volume_get(struct snd_kcontrol *kcontrol,
 566                               struct snd_ctl_elem_value *ucontrol)
 567 {
 568         struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
 569         unsigned int val;
 570
 571         val = snd_soc_component_read(component, TAS5720_VOLUME_CTRL_REG);
 572         ucontrol->value.integer.value[0] = val << 1;
 573
 574         val = snd_soc_component_read(component, TAS5722_DIGITAL_CTRL2_REG);
 575         ucontrol->value.integer.value[0] |= val & TAS5722_VOL_CONTROL_LSB;
 576
 577         return 0;
 578 }
 579
 580 static int tas5722_volume_set(struct snd_kcontrol *kcontrol,
 581                               struct snd_ctl_elem_value *ucontrol)
 582 {
 583         struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
 584         unsigned int sel = ucontrol->value.integer.value[0];
 585
 586         snd_soc_component_write(component, TAS5720_VOLUME_CTRL_REG, sel >> 1);
 587         snd_soc_component_update_bits(component, TAS5722_DIGITAL_CTRL2_REG,
 588                                       TAS5722_VOL_CONTROL_LSB, sel);
 589
 590         return 0;
 591 }
 592
 593 static const struct snd_kcontrol_new tas5720_snd_controls[] = {
 594         SOC_SINGLE_TLV("Speaker Driver Playback Volume",
 595                        TAS5720_VOLUME_CTRL_REG, 0, 0xff, 0, tas5720_dac_tlv),
 596         SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
 597                        TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
 598 };
 599
 600 static const struct snd_kcontrol_new tas5720a_q1_snd_controls[] = {
 601         SOC_DOUBLE_R_TLV("Speaker Driver Playback Volume",
 602                                 TAS5720_Q1_VOLUME_CTRL_LEFT_REG,
 603                                 TAS5720_Q1_VOLUME_CTRL_RIGHT_REG,
 604                                 0, 0xff, 0, tas5720_dac_tlv),
 605         SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
 606                                 TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv_a_q1),
 607 };
 608
 609 static const struct snd_kcontrol_new tas5722_snd_controls[] = {
 610         SOC_SINGLE_EXT_TLV("Speaker Driver Playback Volume",
 611                            0, 0, 511, 0,
 612                            tas5722_volume_get, tas5722_volume_set,
 613                            tas5722_dac_tlv),
 614         SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
 615                        TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
 616 };
 617
 618 static const struct snd_soc_dapm_widget tas5720_dapm_widgets[] = {
 619         SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0),
 620         SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas5720_dac_event,
 621                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 622         SND_SOC_DAPM_OUTPUT("OUT")
 623 };
 624
 625 static const struct snd_soc_dapm_route tas5720_audio_map[] = {
 626         { "DAC", NULL, "DAC IN" },
 627         { "OUT", NULL, "DAC" },
 628 };
 629
 630 static const struct snd_soc_component_driver soc_component_dev_tas5720 = {
 631         .probe                  = tas5720_codec_probe,
 632         .remove                 = tas5720_codec_remove,
 633         .suspend                = tas5720_suspend,
 634         .resume                 = tas5720_resume,
 635         .controls               = tas5720_snd_controls,
 636         .num_controls           = ARRAY_SIZE(tas5720_snd_controls),
 637         .dapm_widgets           = tas5720_dapm_widgets,
 638         .num_dapm_widgets       = ARRAY_SIZE(tas5720_dapm_widgets),
 639         .dapm_routes            = tas5720_audio_map,
 640         .num_dapm_routes        = ARRAY_SIZE(tas5720_audio_map),
 641         .idle_bias_on           = 1,
 642         .use_pmdown_time        = 1,
 643         .endianness             = 1,
 644 };
 645
 646 static const struct snd_soc_component_driver soc_component_dev_tas5720_a_q1 = {
 647         .probe                  = tas5720_codec_probe,
 648         .remove                 = tas5720_codec_remove,
 649         .suspend                = tas5720_suspend,
 650         .resume                 = tas5720_resume,
 651         .controls               = tas5720a_q1_snd_controls,
 652         .num_controls           = ARRAY_SIZE(tas5720a_q1_snd_controls),
 653         .dapm_widgets           = tas5720_dapm_widgets,
 654         .num_dapm_widgets       = ARRAY_SIZE(tas5720_dapm_widgets),
 655         .dapm_routes            = tas5720_audio_map,
 656         .num_dapm_routes        = ARRAY_SIZE(tas5720_audio_map),
 657         .idle_bias_on           = 1,
 658         .use_pmdown_time        = 1,
 659         .endianness             = 1,
 660 };
 661
 662 static const struct snd_soc_component_driver soc_component_dev_tas5722 = {
 663         .probe = tas5720_codec_probe,
 664         .remove = tas5720_codec_remove,
 665         .suspend = tas5720_suspend,
 666         .resume = tas5720_resume,
 667         .controls = tas5722_snd_controls,
 668         .num_controls = ARRAY_SIZE(tas5722_snd_controls),
 669         .dapm_widgets = tas5720_dapm_widgets,
 670         .num_dapm_widgets = ARRAY_SIZE(tas5720_dapm_widgets),
 671         .dapm_routes = tas5720_audio_map,
 672         .num_dapm_routes = ARRAY_SIZE(tas5720_audio_map),
 673         .idle_bias_on           = 1,
 674         .use_pmdown_time        = 1,
 675         .endianness             = 1,
 676 };
 677
 678 /* PCM rates supported by the TAS5720 driver */
 679 #define TAS5720_RATES   (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 680                          SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 681
 682 /* Formats supported by TAS5720 driver */
 683 #define TAS5720_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |\
 684                          SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE)
 685
 686 static const struct snd_soc_dai_ops tas5720_speaker_dai_ops = {
 687         .hw_params      = tas5720_hw_params,
 688         .set_fmt        = tas5720_set_dai_fmt,
 689         .set_tdm_slot   = tas5720_set_dai_tdm_slot,
 690         .mute_stream    = tas5720_mute,
 691         .no_capture_mute = 1,
 692 };
 693
 694 /*
 695  * TAS5720 DAI structure
 696  *
 697  * Note that were are advertising .playback.channels_max = 2 despite this being
 698  * a mono amplifier. The reason for that is that some serial ports such as TI's
 699  * McASP module have a minimum number of channels (2) that they can output.
 700  * Advertising more channels than we have will allow us to interface with such
 701  * a serial port without really any negative side effects as the TAS5720 will
 702  * simply ignore any extra channel(s) asides from the one channel that is
 703  * configured to be played back.
 704  */
 705 static struct snd_soc_dai_driver tas5720_dai[] = {
 706         {
 707                 .name = "tas5720-amplifier",
 708                 .playback = {
 709                         .stream_name = "Playback",
 710                         .channels_min = 1,
 711                         .channels_max = 2,
 712                         .rates = TAS5720_RATES,
 713                         .formats = TAS5720_FORMATS,
 714                 },
 715                 .ops = &tas5720_speaker_dai_ops,
 716         },
 717 };
 718
 719 static const struct i2c_device_id tas5720_id[] = {
 720         { "tas5720", TAS5720 },
 721         { "tas5720a-q1", TAS5720A_Q1 },
 722         { "tas5722", TAS5722 },
 723         { }
 724 };
 725 MODULE_DEVICE_TABLE(i2c, tas5720_id);
 726
 727 static int tas5720_probe(struct i2c_client *client)
 728 {
 729         struct device *dev = &client->dev;
 730         struct tas5720_data *data;
 731         const struct regmap_config *regmap_config;
 732         const struct i2c_device_id *id;
 733         int ret;
 734         int i;
 735
 736         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 737         if (!data)
 738                 return -ENOMEM;
 739
 740         id = i2c_match_id(tas5720_id, client);
 741         data->tas5720_client = client;
 742         data->devtype = id->driver_data;
 743
 744         switch (id->driver_data) {
 745         case TAS5720:
 746                 regmap_config = &tas5720_regmap_config;
 747                 break;
 748         case TAS5720A_Q1:
 749                 regmap_config = &tas5720a_q1_regmap_config;
 750                 break;
 751         case TAS5722:
 752                 regmap_config = &tas5722_regmap_config;
 753                 break;
 754         default:
 755                 dev_err(dev, "unexpected private driver data\n");
 756                 return -EINVAL;
 757         }
 758         data->regmap = devm_regmap_init_i2c(client, regmap_config);
 759         if (IS_ERR(data->regmap)) {
 760                 ret = PTR_ERR(data->regmap);
 761                 dev_err(dev, "failed to allocate register map: %d\n", ret);
 762                 return ret;
 763         }
 764
 765         for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
 766                 data->supplies[i].supply = tas5720_supply_names[i];
 767
 768         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
 769                                       data->supplies);
 770         if (ret != 0) {
 771                 dev_err(dev, "failed to request supplies: %d\n", ret);
 772                 return ret;
 773         }
 774
 775         dev_set_drvdata(dev, data);
 776
 777         switch (id->driver_data) {
 778         case TAS5720:
 779                 ret = devm_snd_soc_register_component(&client->dev,
 780                                         &soc_component_dev_tas5720,
 781                                         tas5720_dai,
 782                                         ARRAY_SIZE(tas5720_dai));
 783                 break;
 784         case TAS5720A_Q1:
 785                 ret = devm_snd_soc_register_component(&client->dev,
 786                                         &soc_component_dev_tas5720_a_q1,
 787                                         tas5720_dai,
 788                                         ARRAY_SIZE(tas5720_dai));
 789                 break;
 790         case TAS5722:
 791                 ret = devm_snd_soc_register_component(&client->dev,
 792                                         &soc_component_dev_tas5722,
 793                                         tas5720_dai,
 794                                         ARRAY_SIZE(tas5720_dai));
 795                 break;
 796         default:
 797                 dev_err(dev, "unexpected private driver data\n");
 798                 return -EINVAL;
 799         }
 800         if (ret < 0) {
 801                 dev_err(dev, "failed to register component: %d\n", ret);
 802                 return ret;
 803         }
 804
 805         return 0;
 806 }
 807
 808 #if IS_ENABLED(CONFIG_OF)
 809 static const struct of_device_id tas5720_of_match[] = {
 810         { .compatible = "ti,tas5720", },
 811         { .compatible = "ti,tas5720a-q1", },
 812         { .compatible = "ti,tas5722", },
 813         { },
 814 };
 815 MODULE_DEVICE_TABLE(of, tas5720_of_match);
 816 #endif
 817
 818 static struct i2c_driver tas5720_i2c_driver = {
 819         .driver = {
 820                 .name = "tas5720",
 821                 .of_match_table = of_match_ptr(tas5720_of_match),
 822         },
 823         .probe = tas5720_probe,
 824         .id_table = tas5720_id,
 825 };
 826
 827 module_i2c_driver(tas5720_i2c_driver);
 828
 829 MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>");
 830 MODULE_DESCRIPTION("TAS5720 Audio amplifier driver");
 831 MODULE_LICENSE("GPL");