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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 | // SPDX-License-Identifier: GPL-2.0 /* * ALSA SoC Texas Instruments TAS6424 Quad-Channel Audio Amplifier * * Copyright (C) 2016-2017 Texas Instruments Incorporated - http://www.ti.com/ * Author: Andreas Dannenberg <dannenberg@ti.com> * Andrew F. Davis <afd@ti.com> */ #include <linux/module.h> #include <linux/errno.h> #include <linux/device.h> #include <linux/i2c.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/slab.h> #include <linux/regulator/consumer.h> #include <linux/delay.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include <sound/soc-dapm.h> #include <sound/tlv.h> #include "tas6424.h" /* Define how often to check (and clear) the fault status register (in ms) */ #define TAS6424_FAULT_CHECK_INTERVAL 200 static const char * const tas6424_supply_names[] = { "dvdd", /* Digital power supply. Connect to 3.3-V supply. */ "vbat", /* Supply used for higher voltage analog circuits. */ "pvdd", /* Class-D amp output FETs supply. */ }; #define TAS6424_NUM_SUPPLIES ARRAY_SIZE(tas6424_supply_names) struct tas6424_data { struct device *dev; struct regmap *regmap; struct regulator_bulk_data supplies[TAS6424_NUM_SUPPLIES]; struct delayed_work fault_check_work; unsigned int last_fault1; unsigned int last_fault2; unsigned int last_warn; }; /* * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB steps. Note that * setting the gain below -100 dB (register value <0x7) is effectively a MUTE * as per device datasheet. */ static DECLARE_TLV_DB_SCALE(dac_tlv, -10350, 50, 0); static const struct snd_kcontrol_new tas6424_snd_controls[] = { SOC_SINGLE_TLV("Speaker Driver CH1 Playback Volume", TAS6424_CH1_VOL_CTRL, 0, 0xff, 0, dac_tlv), SOC_SINGLE_TLV("Speaker Driver CH2 Playback Volume", TAS6424_CH2_VOL_CTRL, 0, 0xff, 0, dac_tlv), SOC_SINGLE_TLV("Speaker Driver CH3 Playback Volume", TAS6424_CH3_VOL_CTRL, 0, 0xff, 0, dac_tlv), SOC_SINGLE_TLV("Speaker Driver CH4 Playback Volume", TAS6424_CH4_VOL_CTRL, 0, 0xff, 0, dac_tlv), }; static int tas6424_dac_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm); struct tas6424_data *tas6424 = snd_soc_codec_get_drvdata(codec); dev_dbg(codec->dev, "%s() event=0x%0x\n", __func__, event); if (event & SND_SOC_DAPM_POST_PMU) { /* Observe codec shutdown-to-active time */ msleep(12); /* Turn on TAS6424 periodic fault checking/handling */ tas6424->last_fault1 = 0; tas6424->last_fault2 = 0; tas6424->last_warn = 0; schedule_delayed_work(&tas6424->fault_check_work, msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL)); } else if (event & SND_SOC_DAPM_PRE_PMD) { /* Disable TAS6424 periodic fault checking/handling */ cancel_delayed_work_sync(&tas6424->fault_check_work); } return 0; } static const struct snd_soc_dapm_widget tas6424_dapm_widgets[] = { SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas6424_dac_event, SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), SND_SOC_DAPM_OUTPUT("OUT") }; static const struct snd_soc_dapm_route tas6424_audio_map[] = { { "DAC", NULL, "DAC IN" }, { "OUT", NULL, "DAC" }, }; static int tas6424_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; unsigned int rate = params_rate(params); unsigned int width = params_width(params); u8 sap_ctrl = 0; dev_dbg(codec->dev, "%s() rate=%u width=%u\n", __func__, rate, width); switch (rate) { case 44100: sap_ctrl |= TAS6424_SAP_RATE_44100; break; case 48000: sap_ctrl |= TAS6424_SAP_RATE_48000; break; case 96000: sap_ctrl |= TAS6424_SAP_RATE_96000; break; default: dev_err(codec->dev, "unsupported sample rate: %u\n", rate); return -EINVAL; } switch (width) { case 16: sap_ctrl |= TAS6424_SAP_TDM_SLOT_SZ_16; break; case 24: break; default: dev_err(codec->dev, "unsupported sample width: %u\n", width); return -EINVAL; } snd_soc_update_bits(codec, TAS6424_SAP_CTRL, TAS6424_SAP_RATE_MASK | TAS6424_SAP_TDM_SLOT_SZ_16, sap_ctrl); return 0; } static int tas6424_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct snd_soc_codec *codec = dai->codec; u8 serial_format = 0; dev_dbg(codec->dev, "%s() fmt=0x%0x\n", __func__, fmt); /* clock masters */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: break; default: dev_err(codec->dev, "Invalid DAI master/slave interface\n"); return -EINVAL; } /* signal polarity */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; default: dev_err(codec->dev, "Invalid DAI clock signal polarity\n"); return -EINVAL; } /* interface format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: serial_format |= TAS6424_SAP_I2S; break; case SND_SOC_DAIFMT_DSP_A: serial_format |= TAS6424_SAP_DSP; break; case SND_SOC_DAIFMT_DSP_B: /* * We can use the fact that the TAS6424 does not care about the * LRCLK duty cycle during TDM to receive DSP_B formatted data * in LEFTJ mode (no delaying of the 1st data bit). */ serial_format |= TAS6424_SAP_LEFTJ; break; case SND_SOC_DAIFMT_LEFT_J: serial_format |= TAS6424_SAP_LEFTJ; break; default: dev_err(codec->dev, "Invalid DAI interface format\n"); return -EINVAL; } snd_soc_update_bits(codec, TAS6424_SAP_CTRL, TAS6424_SAP_FMT_MASK, serial_format); return 0; } static int tas6424_set_dai_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) { struct snd_soc_codec *codec = dai->codec; unsigned int first_slot, last_slot; bool sap_tdm_slot_last; dev_dbg(codec->dev, "%s() tx_mask=%d rx_mask=%d\n", __func__, tx_mask, rx_mask); if (!tx_mask || !rx_mask) return 0; /* nothing needed to disable TDM mode */ /* * Determine the first slot and last slot that is being requested so * we'll be able to more easily enforce certain constraints as the * TAS6424's TDM interface is not fully configurable. */ first_slot = __ffs(tx_mask); last_slot = __fls(rx_mask); if (last_slot - first_slot != 4) { dev_err(codec->dev, "tdm mask must cover 4 contiguous slots\n"); return -EINVAL; } switch (first_slot) { case 0: sap_tdm_slot_last = false; break; case 4: sap_tdm_slot_last = true; break; default: dev_err(codec->dev, "tdm mask must start at slot 0 or 4\n"); return -EINVAL; } snd_soc_update_bits(codec, TAS6424_SAP_CTRL, TAS6424_SAP_TDM_SLOT_LAST, sap_tdm_slot_last ? TAS6424_SAP_TDM_SLOT_LAST : 0); return 0; } static int tas6424_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; unsigned int val; dev_dbg(codec->dev, "%s() mute=%d\n", __func__, mute); if (mute) val = TAS6424_ALL_STATE_MUTE; else val = TAS6424_ALL_STATE_PLAY; snd_soc_write(codec, TAS6424_CH_STATE_CTRL, val); return 0; } static int tas6424_power_off(struct snd_soc_codec *codec) { struct tas6424_data *tas6424 = snd_soc_codec_get_drvdata(codec); int ret; snd_soc_write(codec, TAS6424_CH_STATE_CTRL, TAS6424_ALL_STATE_HIZ); regcache_cache_only(tas6424->regmap, true); regcache_mark_dirty(tas6424->regmap); ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), tas6424->supplies); if (ret < 0) { dev_err(codec->dev, "failed to disable supplies: %d\n", ret); return ret; } return 0; } static int tas6424_power_on(struct snd_soc_codec *codec) { struct tas6424_data *tas6424 = snd_soc_codec_get_drvdata(codec); int ret; ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies), tas6424->supplies); if (ret < 0) { dev_err(codec->dev, "failed to enable supplies: %d\n", ret); return ret; } regcache_cache_only(tas6424->regmap, false); ret = regcache_sync(tas6424->regmap); if (ret < 0) { dev_err(codec->dev, "failed to sync regcache: %d\n", ret); return ret; } snd_soc_write(codec, TAS6424_CH_STATE_CTRL, TAS6424_ALL_STATE_MUTE); /* any time we come out of HIZ, the output channels automatically run DC * load diagnostics, wait here until this completes */ msleep(230); return 0; } static int tas6424_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { dev_dbg(codec->dev, "%s() level=%d\n", __func__, level); switch (level) { case SND_SOC_BIAS_ON: case SND_SOC_BIAS_PREPARE: break; case SND_SOC_BIAS_STANDBY: if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) tas6424_power_on(codec); break; case SND_SOC_BIAS_OFF: tas6424_power_off(codec); break; } return 0; } static struct snd_soc_codec_driver soc_codec_dev_tas6424 = { .set_bias_level = tas6424_set_bias_level, .idle_bias_off = true, .component_driver = { .controls = tas6424_snd_controls, .num_controls = ARRAY_SIZE(tas6424_snd_controls), .dapm_widgets = tas6424_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(tas6424_dapm_widgets), .dapm_routes = tas6424_audio_map, .num_dapm_routes = ARRAY_SIZE(tas6424_audio_map), }, }; static struct snd_soc_dai_ops tas6424_speaker_dai_ops = { .hw_params = tas6424_hw_params, .set_fmt = tas6424_set_dai_fmt, .set_tdm_slot = tas6424_set_dai_tdm_slot, .digital_mute = tas6424_mute, }; static struct snd_soc_dai_driver tas6424_dai[] = { { .name = "tas6424-amplifier", .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 4, .rates = TAS6424_RATES, .formats = TAS6424_FORMATS, }, .ops = &tas6424_speaker_dai_ops, }, }; static void tas6424_fault_check_work(struct work_struct *work) { struct tas6424_data *tas6424 = container_of(work, struct tas6424_data, fault_check_work.work); struct device *dev = tas6424->dev; unsigned int reg; int ret; ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT1, ®); if (ret < 0) { dev_err(dev, "failed to read FAULT1 register: %d\n", ret); goto out; } /* * Ignore any clock faults as there is no clean way to check for them. * We would need to start checking for those faults *after* the SAIF * stream has been setup, and stop checking *before* the stream is * stopped to avoid any false-positives. However there are no * appropriate hooks to monitor these events. */ reg &= TAS6424_FAULT_PVDD_OV | TAS6424_FAULT_VBAT_OV | TAS6424_FAULT_PVDD_UV | TAS6424_FAULT_VBAT_UV; if (reg) goto check_global_fault2_reg; /* * Only flag errors once for a given occurrence. This is needed as * the TAS6424 will take time clearing the fault condition internally * during which we don't want to bombard the system with the same * error message over and over. */ if ((reg & TAS6424_FAULT_PVDD_OV) && !(tas6424->last_fault1 & TAS6424_FAULT_PVDD_OV)) dev_crit(dev, "experienced a PVDD overvoltage fault\n"); if ((reg & TAS6424_FAULT_VBAT_OV) && !(tas6424->last_fault1 & TAS6424_FAULT_VBAT_OV)) dev_crit(dev, "experienced a VBAT overvoltage fault\n"); if ((reg & TAS6424_FAULT_PVDD_UV) && !(tas6424->last_fault1 & TAS6424_FAULT_PVDD_UV)) dev_crit(dev, "experienced a PVDD undervoltage fault\n"); if ((reg & TAS6424_FAULT_VBAT_UV) && !(tas6424->last_fault1 & TAS6424_FAULT_VBAT_UV)) dev_crit(dev, "experienced a VBAT undervoltage fault\n"); /* Store current fault1 value so we can detect any changes next time */ tas6424->last_fault1 = reg; check_global_fault2_reg: ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT2, ®); if (ret < 0) { dev_err(dev, "failed to read FAULT2 register: %d\n", ret); goto out; } reg &= TAS6424_FAULT_OTSD | TAS6424_FAULT_OTSD_CH1 | TAS6424_FAULT_OTSD_CH2 | TAS6424_FAULT_OTSD_CH3 | TAS6424_FAULT_OTSD_CH4; if (!reg) goto check_warn_reg; if ((reg & TAS6424_FAULT_OTSD) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD)) dev_crit(dev, "experienced a global overtemp shutdown\n"); if ((reg & TAS6424_FAULT_OTSD_CH1) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH1)) dev_crit(dev, "experienced an overtemp shutdown on CH1\n"); if ((reg & TAS6424_FAULT_OTSD_CH2) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH2)) dev_crit(dev, "experienced an overtemp shutdown on CH2\n"); if ((reg & TAS6424_FAULT_OTSD_CH3) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH3)) dev_crit(dev, "experienced an overtemp shutdown on CH3\n"); if ((reg & TAS6424_FAULT_OTSD_CH4) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH4)) dev_crit(dev, "experienced an overtemp shutdown on CH4\n"); /* Store current fault2 value so we can detect any changes next time */ tas6424->last_fault2 = reg; check_warn_reg: ret = regmap_read(tas6424->regmap, TAS6424_WARN, ®); if (ret < 0) { dev_err(dev, "failed to read WARN register: %d\n", ret); goto out; } reg &= TAS6424_WARN_VDD_UV | TAS6424_WARN_VDD_POR | TAS6424_WARN_VDD_OTW | TAS6424_WARN_VDD_OTW_CH1 | TAS6424_WARN_VDD_OTW_CH2 | TAS6424_WARN_VDD_OTW_CH3 | TAS6424_WARN_VDD_OTW_CH4; if (!reg) goto out; if ((reg & TAS6424_WARN_VDD_UV) && !(tas6424->last_warn & TAS6424_WARN_VDD_UV)) dev_warn(dev, "experienced a VDD under voltage condition\n"); if ((reg & TAS6424_WARN_VDD_POR) && !(tas6424->last_warn & TAS6424_WARN_VDD_POR)) dev_warn(dev, "experienced a VDD POR condition\n"); if ((reg & TAS6424_WARN_VDD_OTW) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW)) dev_warn(dev, "experienced a global overtemp warning\n"); if ((reg & TAS6424_WARN_VDD_OTW_CH1) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH1)) dev_warn(dev, "experienced an overtemp warning on CH1\n"); if ((reg & TAS6424_WARN_VDD_OTW_CH2) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH2)) dev_warn(dev, "experienced an overtemp warning on CH2\n"); if ((reg & TAS6424_WARN_VDD_OTW_CH3) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH3)) dev_warn(dev, "experienced an overtemp warning on CH3\n"); if ((reg & TAS6424_WARN_VDD_OTW_CH4) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH4)) dev_warn(dev, "experienced an overtemp warning on CH4\n"); /* Store current warn value so we can detect any changes next time */ tas6424->last_warn = reg; /* Clear any faults by toggling the CLEAR_FAULT control bit */ ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3, TAS6424_CLEAR_FAULT, TAS6424_CLEAR_FAULT); if (ret < 0) dev_err(dev, "failed to write MISC_CTRL3 register: %d\n", ret); ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3, TAS6424_CLEAR_FAULT, 0); if (ret < 0) dev_err(dev, "failed to write MISC_CTRL3 register: %d\n", ret); out: /* Schedule the next fault check at the specified interval */ schedule_delayed_work(&tas6424->fault_check_work, msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL)); } static const struct reg_default tas6424_reg_defaults[] = { { TAS6424_MODE_CTRL, 0x00 }, { TAS6424_MISC_CTRL1, 0x32 }, { TAS6424_MISC_CTRL2, 0x62 }, { TAS6424_SAP_CTRL, 0x04 }, { TAS6424_CH_STATE_CTRL, 0x55 }, { TAS6424_CH1_VOL_CTRL, 0xcf }, { TAS6424_CH2_VOL_CTRL, 0xcf }, { TAS6424_CH3_VOL_CTRL, 0xcf }, { TAS6424_CH4_VOL_CTRL, 0xcf }, { TAS6424_DC_DIAG_CTRL1, 0x00 }, { TAS6424_DC_DIAG_CTRL2, 0x11 }, { TAS6424_DC_DIAG_CTRL3, 0x11 }, { TAS6424_PIN_CTRL, 0xff }, { TAS6424_AC_DIAG_CTRL1, 0x00 }, { TAS6424_MISC_CTRL3, 0x00 }, { TAS6424_CLIP_CTRL, 0x01 }, { TAS6424_CLIP_WINDOW, 0x14 }, { TAS6424_CLIP_WARN, 0x00 }, { TAS6424_CBC_STAT, 0x00 }, { TAS6424_MISC_CTRL4, 0x40 }, }; static bool tas6424_is_writable_reg(struct device *dev, unsigned int reg) { switch (reg) { case TAS6424_MODE_CTRL: case TAS6424_MISC_CTRL1: case TAS6424_MISC_CTRL2: case TAS6424_SAP_CTRL: case TAS6424_CH_STATE_CTRL: case TAS6424_CH1_VOL_CTRL: case TAS6424_CH2_VOL_CTRL: case TAS6424_CH3_VOL_CTRL: case TAS6424_CH4_VOL_CTRL: case TAS6424_DC_DIAG_CTRL1: case TAS6424_DC_DIAG_CTRL2: case TAS6424_DC_DIAG_CTRL3: case TAS6424_PIN_CTRL: case TAS6424_AC_DIAG_CTRL1: case TAS6424_MISC_CTRL3: case TAS6424_CLIP_CTRL: case TAS6424_CLIP_WINDOW: case TAS6424_CLIP_WARN: case TAS6424_CBC_STAT: case TAS6424_MISC_CTRL4: return true; default: return false; } } static bool tas6424_is_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case TAS6424_DC_LOAD_DIAG_REP12: case TAS6424_DC_LOAD_DIAG_REP34: case TAS6424_DC_LOAD_DIAG_REPLO: case TAS6424_CHANNEL_STATE: case TAS6424_CHANNEL_FAULT: case TAS6424_GLOB_FAULT1: case TAS6424_GLOB_FAULT2: case TAS6424_WARN: case TAS6424_AC_LOAD_DIAG_REP1: case TAS6424_AC_LOAD_DIAG_REP2: case TAS6424_AC_LOAD_DIAG_REP3: case TAS6424_AC_LOAD_DIAG_REP4: return true; default: return false; } } static const struct regmap_config tas6424_regmap_config = { .reg_bits = 8, .val_bits = 8, .writeable_reg = tas6424_is_writable_reg, .volatile_reg = tas6424_is_volatile_reg, .max_register = TAS6424_MAX, .reg_defaults = tas6424_reg_defaults, .num_reg_defaults = ARRAY_SIZE(tas6424_reg_defaults), .cache_type = REGCACHE_RBTREE, }; #if IS_ENABLED(CONFIG_OF) static const struct of_device_id tas6424_of_ids[] = { { .compatible = "ti,tas6424", }, { }, }; MODULE_DEVICE_TABLE(of, tas6424_of_ids); #endif static int tas6424_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct tas6424_data *tas6424; int ret; int i; tas6424 = devm_kzalloc(dev, sizeof(*tas6424), GFP_KERNEL); if (!tas6424) return -ENOMEM; dev_set_drvdata(dev, tas6424); tas6424->dev = dev; tas6424->regmap = devm_regmap_init_i2c(client, &tas6424_regmap_config); if (IS_ERR(tas6424->regmap)) { ret = PTR_ERR(tas6424->regmap); dev_err(dev, "unable to allocate register map: %d\n", ret); return ret; } for (i = 0; i < ARRAY_SIZE(tas6424->supplies); i++) tas6424->supplies[i].supply = tas6424_supply_names[i]; ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(tas6424->supplies), tas6424->supplies); if (ret) { dev_err(dev, "unable to request supplies: %d\n", ret); return ret; } ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies), tas6424->supplies); if (ret) { dev_err(dev, "unable to enable supplies: %d\n", ret); return ret; } /* Reset device to establish well-defined startup state */ ret = regmap_update_bits(tas6424->regmap, TAS6424_MODE_CTRL, TAS6424_RESET, TAS6424_RESET); if (ret) { dev_err(dev, "unable to reset device: %d\n", ret); return ret; } INIT_DELAYED_WORK(&tas6424->fault_check_work, tas6424_fault_check_work); ret = snd_soc_register_codec(dev, &soc_codec_dev_tas6424, tas6424_dai, ARRAY_SIZE(tas6424_dai)); if (ret < 0) { dev_err(dev, "unable to register codec: %d\n", ret); return ret; } return 0; } static int tas6424_i2c_remove(struct i2c_client *client) { struct device *dev = &client->dev; struct tas6424_data *tas6424 = dev_get_drvdata(dev); int ret; snd_soc_unregister_codec(dev); cancel_delayed_work_sync(&tas6424->fault_check_work); ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), tas6424->supplies); if (ret < 0) { dev_err(dev, "unable to disable supplies: %d\n", ret); return ret; } return 0; } static const struct i2c_device_id tas6424_i2c_ids[] = { { "tas6424", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, tas6424_i2c_ids); static struct i2c_driver tas6424_i2c_driver = { .driver = { .name = "tas6424", .of_match_table = of_match_ptr(tas6424_of_ids), }, .probe = tas6424_i2c_probe, .remove = tas6424_i2c_remove, .id_table = tas6424_i2c_ids, }; module_i2c_driver(tas6424_i2c_driver); MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>"); MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); MODULE_DESCRIPTION("TAS6424 Audio amplifier driver"); MODULE_LICENSE("GPL v2"); |