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