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1// SPDX-License-Identifier: GPL-2.02/*3 * ALSA SoC Texas Instruments TAS6424 Quad-Channel Audio Amplifier4 *5 * Copyright (C) 2016-2017 Texas Instruments Incorporated - https://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/regmap.h>15#include <linux/slab.h>16#include <linux/regulator/consumer.h>17#include <linux/delay.h>18#include <linux/gpio/consumer.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 20030 31static 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 38struct 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_cfault;44 unsigned int last_fault1;45 unsigned int last_fault2;46 unsigned int last_warn;47 struct gpio_desc *standby_gpio;48 struct gpio_desc *mute_gpio;49};50 51/*52 * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB steps. Note that53 * setting the gain below -100 dB (register value <0x7) is effectively a MUTE54 * as per device datasheet.55 */56static DECLARE_TLV_DB_SCALE(dac_tlv, -10350, 50, 0);57 58static const struct snd_kcontrol_new tas6424_snd_controls[] = {59 SOC_SINGLE_TLV("Speaker Driver CH1 Playback Volume",60 TAS6424_CH1_VOL_CTRL, 0, 0xff, 0, dac_tlv),61 SOC_SINGLE_TLV("Speaker Driver CH2 Playback Volume",62 TAS6424_CH2_VOL_CTRL, 0, 0xff, 0, dac_tlv),63 SOC_SINGLE_TLV("Speaker Driver CH3 Playback Volume",64 TAS6424_CH3_VOL_CTRL, 0, 0xff, 0, dac_tlv),65 SOC_SINGLE_TLV("Speaker Driver CH4 Playback Volume",66 TAS6424_CH4_VOL_CTRL, 0, 0xff, 0, dac_tlv),67 SOC_SINGLE_STROBE("Auto Diagnostics Switch", TAS6424_DC_DIAG_CTRL1,68 TAS6424_LDGBYPASS_SHIFT, 1),69};70 71static int tas6424_dac_event(struct snd_soc_dapm_widget *w,72 struct snd_kcontrol *kcontrol, int event)73{74 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);75 struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);76 77 dev_dbg(component->dev, "%s() event=0x%0x\n", __func__, event);78 79 if (event & SND_SOC_DAPM_POST_PMU) {80 /* Observe codec shutdown-to-active time */81 msleep(12);82 83 /* Turn on TAS6424 periodic fault checking/handling */84 tas6424->last_fault1 = 0;85 tas6424->last_fault2 = 0;86 tas6424->last_warn = 0;87 schedule_delayed_work(&tas6424->fault_check_work,88 msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL));89 } else if (event & SND_SOC_DAPM_PRE_PMD) {90 /* Disable TAS6424 periodic fault checking/handling */91 cancel_delayed_work_sync(&tas6424->fault_check_work);92 }93 94 return 0;95}96 97static const struct snd_soc_dapm_widget tas6424_dapm_widgets[] = {98 SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0),99 SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas6424_dac_event,100 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),101 SND_SOC_DAPM_OUTPUT("OUT")102};103 104static const struct snd_soc_dapm_route tas6424_audio_map[] = {105 { "DAC", NULL, "DAC IN" },106 { "OUT", NULL, "DAC" },107};108 109static int tas6424_hw_params(struct snd_pcm_substream *substream,110 struct snd_pcm_hw_params *params,111 struct snd_soc_dai *dai)112{113 struct snd_soc_component *component = dai->component;114 unsigned int rate = params_rate(params);115 unsigned int width = params_width(params);116 u8 sap_ctrl = 0;117 118 dev_dbg(component->dev, "%s() rate=%u width=%u\n", __func__, rate, width);119 120 switch (rate) {121 case 44100:122 sap_ctrl |= TAS6424_SAP_RATE_44100;123 break;124 case 48000:125 sap_ctrl |= TAS6424_SAP_RATE_48000;126 break;127 case 96000:128 sap_ctrl |= TAS6424_SAP_RATE_96000;129 break;130 default:131 dev_err(component->dev, "unsupported sample rate: %u\n", rate);132 return -EINVAL;133 }134 135 switch (width) {136 case 16:137 sap_ctrl |= TAS6424_SAP_TDM_SLOT_SZ_16;138 break;139 case 24:140 break;141 default:142 dev_err(component->dev, "unsupported sample width: %u\n", width);143 return -EINVAL;144 }145 146 snd_soc_component_update_bits(component, TAS6424_SAP_CTRL,147 TAS6424_SAP_RATE_MASK |148 TAS6424_SAP_TDM_SLOT_SZ_16,149 sap_ctrl);150 151 return 0;152}153 154static int tas6424_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)155{156 struct snd_soc_component *component = dai->component;157 u8 serial_format = 0;158 159 dev_dbg(component->dev, "%s() fmt=0x%0x\n", __func__, fmt);160 161 /* clock masters */162 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {163 case SND_SOC_DAIFMT_CBC_CFC:164 break;165 default:166 dev_err(component->dev, "Invalid DAI clocking\n");167 return -EINVAL;168 }169 170 /* signal polarity */171 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {172 case SND_SOC_DAIFMT_NB_NF:173 break;174 default:175 dev_err(component->dev, "Invalid DAI clock signal polarity\n");176 return -EINVAL;177 }178 179 /* interface format */180 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {181 case SND_SOC_DAIFMT_I2S:182 serial_format |= TAS6424_SAP_I2S;183 break;184 case SND_SOC_DAIFMT_DSP_A:185 serial_format |= TAS6424_SAP_DSP;186 break;187 case SND_SOC_DAIFMT_DSP_B:188 /*189 * We can use the fact that the TAS6424 does not care about the190 * LRCLK duty cycle during TDM to receive DSP_B formatted data191 * in LEFTJ mode (no delaying of the 1st data bit).192 */193 serial_format |= TAS6424_SAP_LEFTJ;194 break;195 case SND_SOC_DAIFMT_LEFT_J:196 serial_format |= TAS6424_SAP_LEFTJ;197 break;198 default:199 dev_err(component->dev, "Invalid DAI interface format\n");200 return -EINVAL;201 }202 203 snd_soc_component_update_bits(component, TAS6424_SAP_CTRL,204 TAS6424_SAP_FMT_MASK, serial_format);205 206 return 0;207}208 209static int tas6424_set_dai_tdm_slot(struct snd_soc_dai *dai,210 unsigned int tx_mask, unsigned int rx_mask,211 int slots, int slot_width)212{213 struct snd_soc_component *component = dai->component;214 unsigned int first_slot, last_slot;215 bool sap_tdm_slot_last;216 217 dev_dbg(component->dev, "%s() tx_mask=%d rx_mask=%d\n", __func__,218 tx_mask, rx_mask);219 220 if (!tx_mask || !rx_mask)221 return 0; /* nothing needed to disable TDM mode */222 223 /*224 * Determine the first slot and last slot that is being requested so225 * we'll be able to more easily enforce certain constraints as the226 * TAS6424's TDM interface is not fully configurable.227 */228 first_slot = __ffs(tx_mask);229 last_slot = __fls(rx_mask);230 231 if (last_slot - first_slot != 4) {232 dev_err(component->dev, "tdm mask must cover 4 contiguous slots\n");233 return -EINVAL;234 }235 236 switch (first_slot) {237 case 0:238 sap_tdm_slot_last = false;239 break;240 case 4:241 sap_tdm_slot_last = true;242 break;243 default:244 dev_err(component->dev, "tdm mask must start at slot 0 or 4\n");245 return -EINVAL;246 }247 248 snd_soc_component_update_bits(component, TAS6424_SAP_CTRL, TAS6424_SAP_TDM_SLOT_LAST,249 sap_tdm_slot_last ? TAS6424_SAP_TDM_SLOT_LAST : 0);250 251 return 0;252}253 254static int tas6424_mute(struct snd_soc_dai *dai, int mute, int direction)255{256 struct snd_soc_component *component = dai->component;257 struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);258 unsigned int val;259 260 dev_dbg(component->dev, "%s() mute=%d\n", __func__, mute);261 262 if (tas6424->mute_gpio) {263 gpiod_set_value_cansleep(tas6424->mute_gpio, mute);264 return 0;265 }266 267 if (mute)268 val = TAS6424_ALL_STATE_MUTE;269 else270 val = TAS6424_ALL_STATE_PLAY;271 272 snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, val);273 274 return 0;275}276 277static int tas6424_power_off(struct snd_soc_component *component)278{279 struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);280 int ret;281 282 snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, TAS6424_ALL_STATE_HIZ);283 284 regcache_cache_only(tas6424->regmap, true);285 regcache_mark_dirty(tas6424->regmap);286 287 ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies),288 tas6424->supplies);289 if (ret < 0) {290 dev_err(component->dev, "failed to disable supplies: %d\n", ret);291 return ret;292 }293 294 return 0;295}296 297static int tas6424_power_on(struct snd_soc_component *component)298{299 struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component);300 int ret;301 u8 chan_states;302 int no_auto_diags = 0;303 unsigned int reg_val;304 305 if (!regmap_read(tas6424->regmap, TAS6424_DC_DIAG_CTRL1, ®_val))306 no_auto_diags = reg_val & TAS6424_LDGBYPASS_MASK;307 308 ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies),309 tas6424->supplies);310 if (ret < 0) {311 dev_err(component->dev, "failed to enable supplies: %d\n", ret);312 return ret;313 }314 315 regcache_cache_only(tas6424->regmap, false);316 317 ret = regcache_sync(tas6424->regmap);318 if (ret < 0) {319 dev_err(component->dev, "failed to sync regcache: %d\n", ret);320 return ret;321 }322 323 if (tas6424->mute_gpio) {324 gpiod_set_value_cansleep(tas6424->mute_gpio, 0);325 /*326 * channels are muted via the mute pin. Don't also mute327 * them via the registers so that subsequent register328 * access is not necessary to un-mute the channels329 */330 chan_states = TAS6424_ALL_STATE_PLAY;331 } else {332 chan_states = TAS6424_ALL_STATE_MUTE;333 }334 snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, chan_states);335 336 /* any time we come out of HIZ, the output channels automatically run DC337 * load diagnostics if autodiagnotics are enabled. wait here until this338 * completes.339 */340 if (!no_auto_diags)341 msleep(230);342 343 return 0;344}345 346static int tas6424_set_bias_level(struct snd_soc_component *component,347 enum snd_soc_bias_level level)348{349 dev_dbg(component->dev, "%s() level=%d\n", __func__, level);350 351 switch (level) {352 case SND_SOC_BIAS_ON:353 case SND_SOC_BIAS_PREPARE:354 break;355 case SND_SOC_BIAS_STANDBY:356 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)357 tas6424_power_on(component);358 break;359 case SND_SOC_BIAS_OFF:360 tas6424_power_off(component);361 break;362 }363 364 return 0;365}366 367static struct snd_soc_component_driver soc_codec_dev_tas6424 = {368 .set_bias_level = tas6424_set_bias_level,369 .controls = tas6424_snd_controls,370 .num_controls = ARRAY_SIZE(tas6424_snd_controls),371 .dapm_widgets = tas6424_dapm_widgets,372 .num_dapm_widgets = ARRAY_SIZE(tas6424_dapm_widgets),373 .dapm_routes = tas6424_audio_map,374 .num_dapm_routes = ARRAY_SIZE(tas6424_audio_map),375 .use_pmdown_time = 1,376 .endianness = 1,377};378 379static const struct snd_soc_dai_ops tas6424_speaker_dai_ops = {380 .hw_params = tas6424_hw_params,381 .set_fmt = tas6424_set_dai_fmt,382 .set_tdm_slot = tas6424_set_dai_tdm_slot,383 .mute_stream = tas6424_mute,384 .no_capture_mute = 1,385};386 387static struct snd_soc_dai_driver tas6424_dai[] = {388 {389 .name = "tas6424-amplifier",390 .playback = {391 .stream_name = "Playback",392 .channels_min = 1,393 .channels_max = 4,394 .rates = TAS6424_RATES,395 .formats = TAS6424_FORMATS,396 },397 .ops = &tas6424_speaker_dai_ops,398 },399};400 401static void tas6424_fault_check_work(struct work_struct *work)402{403 struct tas6424_data *tas6424 = container_of(work, struct tas6424_data,404 fault_check_work.work);405 struct device *dev = tas6424->dev;406 unsigned int reg;407 int ret;408 409 ret = regmap_read(tas6424->regmap, TAS6424_CHANNEL_FAULT, ®);410 if (ret < 0) {411 dev_err(dev, "failed to read CHANNEL_FAULT register: %d\n", ret);412 goto out;413 }414 415 if (!reg) {416 tas6424->last_cfault = reg;417 goto check_global_fault1_reg;418 }419 420 /*421 * Only flag errors once for a given occurrence. This is needed as422 * the TAS6424 will take time clearing the fault condition internally423 * during which we don't want to bombard the system with the same424 * error message over and over.425 */426 if ((reg & TAS6424_FAULT_OC_CH1) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH1))427 dev_crit(dev, "experienced a channel 1 overcurrent fault\n");428 429 if ((reg & TAS6424_FAULT_OC_CH2) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH2))430 dev_crit(dev, "experienced a channel 2 overcurrent fault\n");431 432 if ((reg & TAS6424_FAULT_OC_CH3) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH3))433 dev_crit(dev, "experienced a channel 3 overcurrent fault\n");434 435 if ((reg & TAS6424_FAULT_OC_CH4) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH4))436 dev_crit(dev, "experienced a channel 4 overcurrent fault\n");437 438 if ((reg & TAS6424_FAULT_DC_CH1) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH1))439 dev_crit(dev, "experienced a channel 1 DC fault\n");440 441 if ((reg & TAS6424_FAULT_DC_CH2) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH2))442 dev_crit(dev, "experienced a channel 2 DC fault\n");443 444 if ((reg & TAS6424_FAULT_DC_CH3) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH3))445 dev_crit(dev, "experienced a channel 3 DC fault\n");446 447 if ((reg & TAS6424_FAULT_DC_CH4) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH4))448 dev_crit(dev, "experienced a channel 4 DC fault\n");449 450 /* Store current fault1 value so we can detect any changes next time */451 tas6424->last_cfault = reg;452 453check_global_fault1_reg:454 ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT1, ®);455 if (ret < 0) {456 dev_err(dev, "failed to read GLOB_FAULT1 register: %d\n", ret);457 goto out;458 }459 460 /*461 * Ignore any clock faults as there is no clean way to check for them.462 * We would need to start checking for those faults *after* the SAIF463 * stream has been setup, and stop checking *before* the stream is464 * stopped to avoid any false-positives. However there are no465 * appropriate hooks to monitor these events.466 */467 reg &= TAS6424_FAULT_PVDD_OV |468 TAS6424_FAULT_VBAT_OV |469 TAS6424_FAULT_PVDD_UV |470 TAS6424_FAULT_VBAT_UV;471 472 if (!reg) {473 tas6424->last_fault1 = reg;474 goto check_global_fault2_reg;475 }476 477 if ((reg & TAS6424_FAULT_PVDD_OV) && !(tas6424->last_fault1 & TAS6424_FAULT_PVDD_OV))478 dev_crit(dev, "experienced a PVDD overvoltage fault\n");479 480 if ((reg & TAS6424_FAULT_VBAT_OV) && !(tas6424->last_fault1 & TAS6424_FAULT_VBAT_OV))481 dev_crit(dev, "experienced a VBAT overvoltage fault\n");482 483 if ((reg & TAS6424_FAULT_PVDD_UV) && !(tas6424->last_fault1 & TAS6424_FAULT_PVDD_UV))484 dev_crit(dev, "experienced a PVDD undervoltage fault\n");485 486 if ((reg & TAS6424_FAULT_VBAT_UV) && !(tas6424->last_fault1 & TAS6424_FAULT_VBAT_UV))487 dev_crit(dev, "experienced a VBAT undervoltage fault\n");488 489 /* Store current fault1 value so we can detect any changes next time */490 tas6424->last_fault1 = reg;491 492check_global_fault2_reg:493 ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT2, ®);494 if (ret < 0) {495 dev_err(dev, "failed to read GLOB_FAULT2 register: %d\n", ret);496 goto out;497 }498 499 reg &= TAS6424_FAULT_OTSD |500 TAS6424_FAULT_OTSD_CH1 |501 TAS6424_FAULT_OTSD_CH2 |502 TAS6424_FAULT_OTSD_CH3 |503 TAS6424_FAULT_OTSD_CH4;504 505 if (!reg) {506 tas6424->last_fault2 = reg;507 goto check_warn_reg;508 }509 510 if ((reg & TAS6424_FAULT_OTSD) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD))511 dev_crit(dev, "experienced a global overtemp shutdown\n");512 513 if ((reg & TAS6424_FAULT_OTSD_CH1) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH1))514 dev_crit(dev, "experienced an overtemp shutdown on CH1\n");515 516 if ((reg & TAS6424_FAULT_OTSD_CH2) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH2))517 dev_crit(dev, "experienced an overtemp shutdown on CH2\n");518 519 if ((reg & TAS6424_FAULT_OTSD_CH3) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH3))520 dev_crit(dev, "experienced an overtemp shutdown on CH3\n");521 522 if ((reg & TAS6424_FAULT_OTSD_CH4) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH4))523 dev_crit(dev, "experienced an overtemp shutdown on CH4\n");524 525 /* Store current fault2 value so we can detect any changes next time */526 tas6424->last_fault2 = reg;527 528check_warn_reg:529 ret = regmap_read(tas6424->regmap, TAS6424_WARN, ®);530 if (ret < 0) {531 dev_err(dev, "failed to read WARN register: %d\n", ret);532 goto out;533 }534 535 reg &= TAS6424_WARN_VDD_UV |536 TAS6424_WARN_VDD_POR |537 TAS6424_WARN_VDD_OTW |538 TAS6424_WARN_VDD_OTW_CH1 |539 TAS6424_WARN_VDD_OTW_CH2 |540 TAS6424_WARN_VDD_OTW_CH3 |541 TAS6424_WARN_VDD_OTW_CH4;542 543 if (!reg) {544 tas6424->last_warn = reg;545 goto out;546 }547 548 if ((reg & TAS6424_WARN_VDD_UV) && !(tas6424->last_warn & TAS6424_WARN_VDD_UV))549 dev_warn(dev, "experienced a VDD under voltage condition\n");550 551 if ((reg & TAS6424_WARN_VDD_POR) && !(tas6424->last_warn & TAS6424_WARN_VDD_POR))552 dev_warn(dev, "experienced a VDD POR condition\n");553 554 if ((reg & TAS6424_WARN_VDD_OTW) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW))555 dev_warn(dev, "experienced a global overtemp warning\n");556 557 if ((reg & TAS6424_WARN_VDD_OTW_CH1) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH1))558 dev_warn(dev, "experienced an overtemp warning on CH1\n");559 560 if ((reg & TAS6424_WARN_VDD_OTW_CH2) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH2))561 dev_warn(dev, "experienced an overtemp warning on CH2\n");562 563 if ((reg & TAS6424_WARN_VDD_OTW_CH3) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH3))564 dev_warn(dev, "experienced an overtemp warning on CH3\n");565 566 if ((reg & TAS6424_WARN_VDD_OTW_CH4) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH4))567 dev_warn(dev, "experienced an overtemp warning on CH4\n");568 569 /* Store current warn value so we can detect any changes next time */570 tas6424->last_warn = reg;571 572 /* Clear any warnings by toggling the CLEAR_FAULT control bit */573 ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3,574 TAS6424_CLEAR_FAULT, TAS6424_CLEAR_FAULT);575 if (ret < 0)576 dev_err(dev, "failed to write MISC_CTRL3 register: %d\n", ret);577 578 ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3,579 TAS6424_CLEAR_FAULT, 0);580 if (ret < 0)581 dev_err(dev, "failed to write MISC_CTRL3 register: %d\n", ret);582 583out:584 /* Schedule the next fault check at the specified interval */585 schedule_delayed_work(&tas6424->fault_check_work,586 msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL));587}588 589static const struct reg_default tas6424_reg_defaults[] = {590 { TAS6424_MODE_CTRL, 0x00 },591 { TAS6424_MISC_CTRL1, 0x32 },592 { TAS6424_MISC_CTRL2, 0x62 },593 { TAS6424_SAP_CTRL, 0x04 },594 { TAS6424_CH_STATE_CTRL, 0x55 },595 { TAS6424_CH1_VOL_CTRL, 0xcf },596 { TAS6424_CH2_VOL_CTRL, 0xcf },597 { TAS6424_CH3_VOL_CTRL, 0xcf },598 { TAS6424_CH4_VOL_CTRL, 0xcf },599 { TAS6424_DC_DIAG_CTRL1, 0x00 },600 { TAS6424_DC_DIAG_CTRL2, 0x11 },601 { TAS6424_DC_DIAG_CTRL3, 0x11 },602 { TAS6424_PIN_CTRL, 0xff },603 { TAS6424_AC_DIAG_CTRL1, 0x00 },604 { TAS6424_MISC_CTRL3, 0x00 },605 { TAS6424_CLIP_CTRL, 0x01 },606 { TAS6424_CLIP_WINDOW, 0x14 },607 { TAS6424_CLIP_WARN, 0x00 },608 { TAS6424_CBC_STAT, 0x00 },609 { TAS6424_MISC_CTRL4, 0x40 },610};611 612static bool tas6424_is_writable_reg(struct device *dev, unsigned int reg)613{614 switch (reg) {615 case TAS6424_MODE_CTRL:616 case TAS6424_MISC_CTRL1:617 case TAS6424_MISC_CTRL2:618 case TAS6424_SAP_CTRL:619 case TAS6424_CH_STATE_CTRL:620 case TAS6424_CH1_VOL_CTRL:621 case TAS6424_CH2_VOL_CTRL:622 case TAS6424_CH3_VOL_CTRL:623 case TAS6424_CH4_VOL_CTRL:624 case TAS6424_DC_DIAG_CTRL1:625 case TAS6424_DC_DIAG_CTRL2:626 case TAS6424_DC_DIAG_CTRL3:627 case TAS6424_PIN_CTRL:628 case TAS6424_AC_DIAG_CTRL1:629 case TAS6424_MISC_CTRL3:630 case TAS6424_CLIP_CTRL:631 case TAS6424_CLIP_WINDOW:632 case TAS6424_CLIP_WARN:633 case TAS6424_CBC_STAT:634 case TAS6424_MISC_CTRL4:635 return true;636 default:637 return false;638 }639}640 641static bool tas6424_is_volatile_reg(struct device *dev, unsigned int reg)642{643 switch (reg) {644 case TAS6424_DC_LOAD_DIAG_REP12:645 case TAS6424_DC_LOAD_DIAG_REP34:646 case TAS6424_DC_LOAD_DIAG_REPLO:647 case TAS6424_CHANNEL_STATE:648 case TAS6424_CHANNEL_FAULT:649 case TAS6424_GLOB_FAULT1:650 case TAS6424_GLOB_FAULT2:651 case TAS6424_WARN:652 case TAS6424_AC_LOAD_DIAG_REP1:653 case TAS6424_AC_LOAD_DIAG_REP2:654 case TAS6424_AC_LOAD_DIAG_REP3:655 case TAS6424_AC_LOAD_DIAG_REP4:656 return true;657 default:658 return false;659 }660}661 662static const struct regmap_config tas6424_regmap_config = {663 .reg_bits = 8,664 .val_bits = 8,665 666 .writeable_reg = tas6424_is_writable_reg,667 .volatile_reg = tas6424_is_volatile_reg,668 669 .max_register = TAS6424_MAX,670 .reg_defaults = tas6424_reg_defaults,671 .num_reg_defaults = ARRAY_SIZE(tas6424_reg_defaults),672 .cache_type = REGCACHE_RBTREE,673};674 675#if IS_ENABLED(CONFIG_OF)676static const struct of_device_id tas6424_of_ids[] = {677 { .compatible = "ti,tas6424", },678 { },679};680MODULE_DEVICE_TABLE(of, tas6424_of_ids);681#endif682 683static int tas6424_i2c_probe(struct i2c_client *client)684{685 struct device *dev = &client->dev;686 struct tas6424_data *tas6424;687 int ret;688 int i;689 690 tas6424 = devm_kzalloc(dev, sizeof(*tas6424), GFP_KERNEL);691 if (!tas6424)692 return -ENOMEM;693 dev_set_drvdata(dev, tas6424);694 695 tas6424->dev = dev;696 697 tas6424->regmap = devm_regmap_init_i2c(client, &tas6424_regmap_config);698 if (IS_ERR(tas6424->regmap)) {699 ret = PTR_ERR(tas6424->regmap);700 dev_err(dev, "unable to allocate register map: %d\n", ret);701 return ret;702 }703 704 /*705 * Get control of the standby pin and set it LOW to take the codec706 * out of the stand-by mode.707 * Note: The actual pin polarity is taken care of in the GPIO lib708 * according the polarity specified in the DTS.709 */710 tas6424->standby_gpio = devm_gpiod_get_optional(dev, "standby",711 GPIOD_OUT_LOW);712 if (IS_ERR(tas6424->standby_gpio)) {713 if (PTR_ERR(tas6424->standby_gpio) == -EPROBE_DEFER)714 return -EPROBE_DEFER;715 dev_info(dev, "failed to get standby GPIO: %ld\n",716 PTR_ERR(tas6424->standby_gpio));717 tas6424->standby_gpio = NULL;718 }719 720 /*721 * Get control of the mute pin and set it HIGH in order to start with722 * all the output muted.723 * Note: The actual pin polarity is taken care of in the GPIO lib724 * according the polarity specified in the DTS.725 */726 tas6424->mute_gpio = devm_gpiod_get_optional(dev, "mute",727 GPIOD_OUT_HIGH);728 if (IS_ERR(tas6424->mute_gpio)) {729 if (PTR_ERR(tas6424->mute_gpio) == -EPROBE_DEFER)730 return -EPROBE_DEFER;731 dev_info(dev, "failed to get nmute GPIO: %ld\n",732 PTR_ERR(tas6424->mute_gpio));733 tas6424->mute_gpio = NULL;734 }735 736 for (i = 0; i < ARRAY_SIZE(tas6424->supplies); i++)737 tas6424->supplies[i].supply = tas6424_supply_names[i];738 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(tas6424->supplies),739 tas6424->supplies);740 if (ret) {741 dev_err(dev, "unable to request supplies: %d\n", ret);742 return ret;743 }744 745 ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies),746 tas6424->supplies);747 if (ret) {748 dev_err(dev, "unable to enable supplies: %d\n", ret);749 return ret;750 }751 752 /* Reset device to establish well-defined startup state */753 ret = regmap_update_bits(tas6424->regmap, TAS6424_MODE_CTRL,754 TAS6424_RESET, TAS6424_RESET);755 if (ret) {756 dev_err(dev, "unable to reset device: %d\n", ret);757 goto disable_regs;758 }759 760 INIT_DELAYED_WORK(&tas6424->fault_check_work, tas6424_fault_check_work);761 762 ret = devm_snd_soc_register_component(dev, &soc_codec_dev_tas6424,763 tas6424_dai, ARRAY_SIZE(tas6424_dai));764 if (ret < 0) {765 dev_err(dev, "unable to register codec: %d\n", ret);766 goto disable_regs;767 }768 769 return 0;770 771disable_regs:772 regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), tas6424->supplies);773 return ret;774}775 776static void tas6424_i2c_remove(struct i2c_client *client)777{778 struct device *dev = &client->dev;779 struct tas6424_data *tas6424 = dev_get_drvdata(dev);780 int ret;781 782 cancel_delayed_work_sync(&tas6424->fault_check_work);783 784 /* put the codec in stand-by */785 if (tas6424->standby_gpio)786 gpiod_set_value_cansleep(tas6424->standby_gpio, 1);787 788 ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies),789 tas6424->supplies);790 if (ret < 0)791 dev_err(dev, "unable to disable supplies: %d\n", ret);792}793 794static const struct i2c_device_id tas6424_i2c_ids[] = {795 { "tas6424" },796 { }797};798MODULE_DEVICE_TABLE(i2c, tas6424_i2c_ids);799 800static struct i2c_driver tas6424_i2c_driver = {801 .driver = {802 .name = "tas6424",803 .of_match_table = of_match_ptr(tas6424_of_ids),804 },805 .probe = tas6424_i2c_probe,806 .remove = tas6424_i2c_remove,807 .id_table = tas6424_i2c_ids,808};809module_i2c_driver(tas6424_i2c_driver);810 811MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>");812MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");813MODULE_DESCRIPTION("TAS6424 Audio amplifier driver");814MODULE_LICENSE("GPL v2");815