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1// SPDX-License-Identifier: GPL-2.0+2//3// Midas audio support4//5// Copyright (C) 2018 Simon Shields <simon@lineageos.org>6// Copyright (C) 2020 Samsung Electronics Co., Ltd.7 8#include <linux/clk.h>9#include <linux/gpio/consumer.h>10#include <linux/iio/consumer.h>11#include <linux/mfd/wm8994/registers.h>12#include <linux/input-event-codes.h>13#include <linux/module.h>14#include <linux/of.h>15#include <sound/jack.h>16#include <sound/soc.h>17#include <sound/soc-dapm.h>18 19#include "i2s.h"20#include "../codecs/wm8994.h"21 22/*23 * The MCLK1 clock source is XCLKOUT with its mux set to the external fixed rate24 * oscillator (XXTI).25 */26#define MCLK1_RATE 24000000U27#define MCLK2_RATE 32768U28#define DEFAULT_FLL1_RATE 11289600U29 30struct midas_priv {31 struct gpio_desc *gpio_fm_sel;32 struct gpio_desc *gpio_lineout_sel;33 struct gpio_desc *gpio_headset_detect;34 struct gpio_desc *gpio_headset_key;35 struct iio_channel *adc_headset_detect;36 unsigned int fll1_rate;37 38 struct snd_soc_jack headset_jack;39};40 41static struct snd_soc_jack_pin headset_jack_pins[] = {42 {43 .pin = "Headphone",44 .mask = SND_JACK_HEADPHONE,45 },46 {47 .pin = "Headset Mic",48 .mask = SND_JACK_MICROPHONE,49 },50};51 52/*53 * min_mv/max_mv values in this struct are set up based on DT values.54 */55static struct snd_soc_jack_zone headset_jack_zones[] = {56 { .jack_type = SND_JACK_HEADPHONE, },57 { .jack_type = SND_JACK_HEADSET, },58 { .jack_type = SND_JACK_HEADPHONE, },59};60 61/*62 * This is used for manual detection in headset_key_check, we reuse the63 * structure since it's convenient.64 *65 * min_mv/max_mv values in this struct are set up based on DT values.66 */67static struct snd_soc_jack_zone headset_key_zones[] = {68 { .jack_type = SND_JACK_BTN_0, }, /* Media */69 { .jack_type = SND_JACK_BTN_1, }, /* Volume Up */70 { .jack_type = SND_JACK_BTN_2, }, /* Volume Down */71};72 73static int headset_jack_check(void *data)74{75 struct snd_soc_component *codec = data;76 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(codec);77 struct midas_priv *priv = snd_soc_card_get_drvdata(codec->card);78 int adc, ret;79 int jack_type = 0;80 81 if (!gpiod_get_value_cansleep(priv->gpio_headset_detect))82 return 0;83 84 /* Enable headset mic bias regulator so that the ADC reading works */85 ret = snd_soc_dapm_force_enable_pin(dapm, "headset-mic-bias");86 if (ret < 0) {87 pr_err("%s: Failed to enable headset mic bias regulator (%d), assuming headphones\n",88 __func__, ret);89 return SND_JACK_HEADPHONE;90 }91 snd_soc_dapm_sync(dapm);92 93 /* Sleep for a small amount of time to get the value to stabilize */94 msleep(20);95 96 ret = iio_read_channel_processed(priv->adc_headset_detect, &adc);97 if (ret) {98 pr_err("%s: Failed to read ADC (%d), assuming headphones\n",99 __func__, ret);100 jack_type = SND_JACK_HEADPHONE;101 goto out;102 }103 pr_debug("%s: ADC value is %d\n", __func__, adc);104 105 jack_type = snd_soc_jack_get_type(&priv->headset_jack, adc);106 107out:108 ret = snd_soc_dapm_disable_pin(dapm, "headset-mic-bias");109 if (ret < 0)110 pr_err("%s: Failed to disable headset mic bias regulator (%d)\n",111 __func__, ret);112 snd_soc_dapm_sync(dapm);113 114 return jack_type;115}116 117static int headset_key_check(void *data)118{119 struct snd_soc_component *codec = data;120 struct midas_priv *priv = snd_soc_card_get_drvdata(codec->card);121 int adc, i, ret;122 123 if (!gpiod_get_value_cansleep(priv->gpio_headset_key))124 return 0;125 126 /* Filter out keypresses when 4 pole jack not detected */127 if (!(priv->headset_jack.status & SND_JACK_MICROPHONE))128 return 0;129 130 ret = iio_read_channel_processed(priv->adc_headset_detect, &adc);131 if (ret) {132 pr_err("%s: Failed to read ADC (%d), can't detect key type\n",133 __func__, ret);134 return 0;135 }136 pr_debug("%s: ADC value is %d\n", __func__, adc);137 138 for (i = 0; i < ARRAY_SIZE(headset_key_zones); i++) {139 if (adc >= headset_key_zones[i].min_mv &&140 adc <= headset_key_zones[i].max_mv) {141 return headset_key_zones[i].jack_type;142 }143 }144 145 return 0;146}147 148static struct snd_soc_jack_gpio headset_gpio[] = {149 {150 .name = "Headset Jack",151 .report = SND_JACK_HEADSET,152 .debounce_time = 150,153 .jack_status_check = headset_jack_check,154 },155 {156 .name = "Headset Key",157 .report = SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_BTN_2,158 .debounce_time = 30,159 .jack_status_check = headset_key_check,160 },161};162 163static int midas_start_fll1(struct snd_soc_pcm_runtime *rtd, unsigned int rate)164{165 struct snd_soc_card *card = rtd->card;166 struct midas_priv *priv = snd_soc_card_get_drvdata(card);167 struct snd_soc_dai *aif1_dai = snd_soc_rtd_to_codec(rtd, 0);168 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);169 int ret;170 171 if (!rate)172 rate = priv->fll1_rate;173 /*174 * If no new rate is requested, set FLL1 to a sane default for jack175 * detection.176 */177 if (!rate)178 rate = DEFAULT_FLL1_RATE;179 180 if (rate != priv->fll1_rate && priv->fll1_rate) {181 /* while reconfiguring, switch to MCLK2 for SYSCLK */182 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,183 MCLK2_RATE, SND_SOC_CLOCK_IN);184 if (ret < 0) {185 dev_err(card->dev, "Unable to switch to MCLK2: %d\n", ret);186 return ret;187 }188 }189 190 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,191 MCLK1_RATE, rate);192 if (ret < 0) {193 dev_err(card->dev, "Failed to set FLL1 rate: %d\n", ret);194 return ret;195 }196 priv->fll1_rate = rate;197 198 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_FLL1,199 priv->fll1_rate, SND_SOC_CLOCK_IN);200 if (ret < 0) {201 dev_err(card->dev, "Failed to set SYSCLK source: %d\n", ret);202 return ret;203 }204 205 ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK, 0,206 SAMSUNG_I2S_OPCLK_PCLK);207 if (ret < 0) {208 dev_err(card->dev, "Failed to set OPCLK source: %d\n", ret);209 return ret;210 }211 212 return 0;213}214 215static int midas_stop_fll1(struct snd_soc_pcm_runtime *rtd)216{217 struct snd_soc_card *card = rtd->card;218 struct midas_priv *priv = snd_soc_card_get_drvdata(card);219 struct snd_soc_dai *aif1_dai = snd_soc_rtd_to_codec(rtd, 0);220 int ret;221 222 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,223 MCLK2_RATE, SND_SOC_CLOCK_IN);224 if (ret < 0) {225 dev_err(card->dev, "Unable to switch to MCLK2: %d\n", ret);226 return ret;227 }228 229 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, 0, 0, 0);230 if (ret < 0) {231 dev_err(card->dev, "Unable to stop FLL1: %d\n", ret);232 return ret;233 }234 235 priv->fll1_rate = 0;236 237 return 0;238}239 240static int midas_aif1_hw_params(struct snd_pcm_substream *substream,241 struct snd_pcm_hw_params *params)242{243 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);244 unsigned int pll_out;245 246 /* AIF1CLK should be at least 3MHz for "optimal performance" */247 if (params_rate(params) == 8000 || params_rate(params) == 11025)248 pll_out = params_rate(params) * 512;249 else250 pll_out = params_rate(params) * 256;251 252 return midas_start_fll1(rtd, pll_out);253}254 255static const struct snd_soc_ops midas_aif1_ops = {256 .hw_params = midas_aif1_hw_params,257};258 259/*260 * We only have a single external speaker, so mix stereo data261 * to a single mono stream.262 */263static int midas_ext_spkmode(struct snd_soc_dapm_widget *w,264 struct snd_kcontrol *kcontrol, int event)265{266 struct snd_soc_component *codec = snd_soc_dapm_to_component(w->dapm);267 int ret = 0;268 269 switch (event) {270 case SND_SOC_DAPM_PRE_PMU:271 ret = snd_soc_component_update_bits(codec, WM8994_SPKOUT_MIXERS,272 WM8994_SPKMIXR_TO_SPKOUTL_MASK,273 WM8994_SPKMIXR_TO_SPKOUTL);274 break;275 case SND_SOC_DAPM_POST_PMD:276 ret = snd_soc_component_update_bits(codec, WM8994_SPKOUT_MIXERS,277 WM8994_SPKMIXR_TO_SPKOUTL_MASK,278 0);279 break;280 }281 282 return ret;283}284 285static int midas_fm_set(struct snd_soc_dapm_widget *w,286 struct snd_kcontrol *kcontrol, int event)287{288 struct snd_soc_card *card = w->dapm->card;289 struct midas_priv *priv = snd_soc_card_get_drvdata(card);290 291 if (!priv->gpio_fm_sel)292 return 0;293 294 switch (event) {295 case SND_SOC_DAPM_PRE_PMU:296 gpiod_set_value_cansleep(priv->gpio_fm_sel, 1);297 break;298 case SND_SOC_DAPM_POST_PMD:299 gpiod_set_value_cansleep(priv->gpio_fm_sel, 0);300 break;301 }302 303 return 0;304}305 306static int midas_line_set(struct snd_soc_dapm_widget *w,307 struct snd_kcontrol *kcontrol, int event)308{309 struct snd_soc_card *card = w->dapm->card;310 struct midas_priv *priv = snd_soc_card_get_drvdata(card);311 312 if (!priv->gpio_lineout_sel)313 return 0;314 315 switch (event) {316 case SND_SOC_DAPM_PRE_PMU:317 gpiod_set_value_cansleep(priv->gpio_lineout_sel, 1);318 break;319 case SND_SOC_DAPM_POST_PMD:320 gpiod_set_value_cansleep(priv->gpio_lineout_sel, 0);321 break;322 }323 324 return 0;325}326 327static const struct snd_kcontrol_new midas_controls[] = {328 SOC_DAPM_PIN_SWITCH("HP"),329 330 SOC_DAPM_PIN_SWITCH("SPK"),331 SOC_DAPM_PIN_SWITCH("RCV"),332 333 SOC_DAPM_PIN_SWITCH("LINE"),334 SOC_DAPM_PIN_SWITCH("HDMI"),335 336 SOC_DAPM_PIN_SWITCH("Main Mic"),337 SOC_DAPM_PIN_SWITCH("Sub Mic"),338 SOC_DAPM_PIN_SWITCH("Headset Mic"),339 340 SOC_DAPM_PIN_SWITCH("FM In"),341};342 343static const struct snd_soc_dapm_widget midas_dapm_widgets[] = {344 SND_SOC_DAPM_HP("HP", NULL),345 346 SND_SOC_DAPM_SPK("SPK", midas_ext_spkmode),347 SND_SOC_DAPM_SPK("RCV", NULL),348 349 /* FIXME: toggle MAX77693 on i9300/i9305 */350 SND_SOC_DAPM_LINE("LINE", midas_line_set),351 SND_SOC_DAPM_LINE("HDMI", NULL),352 SND_SOC_DAPM_LINE("FM In", midas_fm_set),353 354 SND_SOC_DAPM_HP("Headphone", NULL),355 SND_SOC_DAPM_MIC("Headset Mic", NULL),356 SND_SOC_DAPM_REGULATOR_SUPPLY("headset-mic-bias", 0, 0),357 SND_SOC_DAPM_MIC("Main Mic", NULL),358 SND_SOC_DAPM_REGULATOR_SUPPLY("mic-bias", 0, 0),359 SND_SOC_DAPM_MIC("Sub Mic", NULL),360 SND_SOC_DAPM_REGULATOR_SUPPLY("submic-bias", 0, 0),361};362 363/* Default routing; supplemented by audio-routing DT property */364static const struct snd_soc_dapm_route midas_dapm_routes[] = {365 /* Bind microphones with their respective regulator supplies */366 {"Main Mic", NULL, "mic-bias"},367 {"Sub Mic", NULL, "submic-bias"},368 {"Headset Mic", NULL, "headset-mic-bias"},369};370 371static int midas_set_bias_level(struct snd_soc_card *card,372 struct snd_soc_dapm_context *dapm,373 enum snd_soc_bias_level level)374{375 struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card,376 &card->dai_link[0]);377 struct snd_soc_dai *aif1_dai = snd_soc_rtd_to_codec(rtd, 0);378 379 if (dapm->dev != aif1_dai->dev)380 return 0;381 382 switch (level) {383 case SND_SOC_BIAS_STANDBY:384 return midas_stop_fll1(rtd);385 case SND_SOC_BIAS_PREPARE:386 return midas_start_fll1(rtd, 0);387 default:388 break;389 }390 391 return 0;392}393 394static int midas_late_probe(struct snd_soc_card *card)395{396 struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card,397 &card->dai_link[0]);398 struct snd_soc_dai *aif1_dai = snd_soc_rtd_to_codec(rtd, 0);399 struct midas_priv *priv = snd_soc_card_get_drvdata(card);400 int ret;401 402 /* Use MCLK2 as SYSCLK for boot */403 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2, MCLK2_RATE,404 SND_SOC_CLOCK_IN);405 if (ret < 0) {406 dev_err(aif1_dai->dev, "Failed to switch to MCLK2: %d\n", ret);407 return ret;408 }409 410 if (!priv->gpio_headset_detect) {411 ret = snd_soc_card_jack_new_pins(card, "Headset",412 SND_JACK_HEADSET | SND_JACK_MECHANICAL |413 SND_JACK_BTN_0 | SND_JACK_BTN_1 |414 SND_JACK_BTN_2 | SND_JACK_BTN_3 |415 SND_JACK_BTN_4 | SND_JACK_BTN_5,416 &priv->headset_jack,417 headset_jack_pins,418 ARRAY_SIZE(headset_jack_pins));419 if (ret)420 return ret;421 422 wm8958_mic_detect(aif1_dai->component, &priv->headset_jack,423 NULL, NULL, NULL, NULL);424 } else {425 /* Some devices (n8000, t310) use a GPIO to detect the jack. */426 ret = snd_soc_card_jack_new_pins(card, "Headset",427 SND_JACK_HEADSET | SND_JACK_BTN_0 |428 SND_JACK_BTN_1 | SND_JACK_BTN_2,429 &priv->headset_jack,430 headset_jack_pins,431 ARRAY_SIZE(headset_jack_pins));432 if (ret) {433 dev_err(card->dev,434 "Failed to set up headset pins: %d\n", ret);435 return ret;436 }437 438 ret = snd_soc_jack_add_zones(&priv->headset_jack,439 ARRAY_SIZE(headset_jack_zones),440 headset_jack_zones);441 if (ret) {442 dev_err(card->dev,443 "Failed to set up headset zones: %d\n", ret);444 return ret;445 }446 447 headset_gpio[0].data = aif1_dai->component;448 headset_gpio[0].desc = priv->gpio_headset_detect;449 450 headset_gpio[1].data = aif1_dai->component;451 headset_gpio[1].desc = priv->gpio_headset_key;452 453 snd_jack_set_key(priv->headset_jack.jack,454 SND_JACK_BTN_0, KEY_MEDIA);455 snd_jack_set_key(priv->headset_jack.jack,456 SND_JACK_BTN_1, KEY_VOLUMEUP);457 snd_jack_set_key(priv->headset_jack.jack,458 SND_JACK_BTN_2, KEY_VOLUMEDOWN);459 460 ret = snd_soc_jack_add_gpios(&priv->headset_jack,461 ARRAY_SIZE(headset_gpio),462 headset_gpio);463 if (ret)464 dev_err(card->dev,465 "Failed to set up headset jack GPIOs: %d\n",466 ret);467 468 return ret;469 }470 471 return 0;472}473 474static struct snd_soc_dai_driver midas_ext_dai[] = {475 {476 .name = "Voice call",477 .playback = {478 .channels_min = 1,479 .channels_max = 2,480 .rate_min = 8000,481 .rate_max = 16000,482 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),483 .formats = SNDRV_PCM_FMTBIT_S16_LE,484 },485 .capture = {486 .channels_min = 1,487 .channels_max = 2,488 .rate_min = 8000,489 .rate_max = 16000,490 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),491 .formats = SNDRV_PCM_FMTBIT_S16_LE,492 },493 },494 {495 .name = "Bluetooth",496 .playback = {497 .channels_min = 1,498 .channels_max = 2,499 .rate_min = 8000,500 .rate_max = 16000,501 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),502 .formats = SNDRV_PCM_FMTBIT_S16_LE,503 },504 .capture = {505 .channels_min = 1,506 .channels_max = 2,507 .rate_min = 8000,508 .rate_max = 16000,509 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),510 .formats = SNDRV_PCM_FMTBIT_S16_LE,511 },512 },513};514 515static const struct snd_soc_component_driver midas_component = {516 .name = "midas-audio",517};518 519SND_SOC_DAILINK_DEFS(wm1811_hifi,520 DAILINK_COMP_ARRAY(COMP_EMPTY()),521 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif1")),522 DAILINK_COMP_ARRAY(COMP_EMPTY()));523 524SND_SOC_DAILINK_DEFS(wm1811_voice,525 DAILINK_COMP_ARRAY(COMP_EMPTY()),526 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif2")),527 DAILINK_COMP_ARRAY(COMP_EMPTY()));528 529SND_SOC_DAILINK_DEFS(wm1811_bt,530 DAILINK_COMP_ARRAY(COMP_EMPTY()),531 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif3")),532 DAILINK_COMP_ARRAY(COMP_EMPTY()));533 534static struct snd_soc_dai_link midas_dai[] = {535 {536 .name = "WM8994 AIF1",537 .stream_name = "HiFi Primary",538 .ops = &midas_aif1_ops,539 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |540 SND_SOC_DAIFMT_CBM_CFM,541 SND_SOC_DAILINK_REG(wm1811_hifi),542 }, {543 .name = "WM1811 Voice",544 .stream_name = "Voice call",545 .ignore_suspend = 1,546 SND_SOC_DAILINK_REG(wm1811_voice),547 }, {548 .name = "WM1811 BT",549 .stream_name = "Bluetooth",550 .ignore_suspend = 1,551 SND_SOC_DAILINK_REG(wm1811_bt),552 },553};554 555static struct snd_soc_card midas_card = {556 .name = "Midas WM1811",557 .owner = THIS_MODULE,558 559 .dai_link = midas_dai,560 .num_links = ARRAY_SIZE(midas_dai),561 .controls = midas_controls,562 .num_controls = ARRAY_SIZE(midas_controls),563 .dapm_widgets = midas_dapm_widgets,564 .num_dapm_widgets = ARRAY_SIZE(midas_dapm_widgets),565 .dapm_routes = midas_dapm_routes,566 .num_dapm_routes = ARRAY_SIZE(midas_dapm_routes),567 568 .set_bias_level = midas_set_bias_level,569 .late_probe = midas_late_probe,570};571 572static int midas_probe(struct platform_device *pdev)573{574 struct device_node *cpu_dai_node = NULL, *codec_dai_node = NULL;575 struct device_node *cpu = NULL, *codec = NULL;576 struct snd_soc_card *card = &midas_card;577 struct device *dev = &pdev->dev;578 static struct snd_soc_dai_link *dai_link;579 enum iio_chan_type channel_type;580 u32 fourpole_threshold[2];581 u32 button_threshold[3];582 struct midas_priv *priv;583 int ret, i;584 585 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);586 if (!priv)587 return -ENOMEM;588 589 snd_soc_card_set_drvdata(card, priv);590 card->dev = dev;591 592 priv->gpio_fm_sel = devm_gpiod_get_optional(dev, "fm-sel", GPIOD_OUT_HIGH);593 if (IS_ERR(priv->gpio_fm_sel))594 return dev_err_probe(dev, PTR_ERR(priv->gpio_fm_sel),595 "Failed to get FM selection GPIO\n");596 597 priv->gpio_lineout_sel = devm_gpiod_get_optional(dev, "lineout-sel",598 GPIOD_OUT_HIGH);599 if (IS_ERR(priv->gpio_lineout_sel))600 return dev_err_probe(dev, PTR_ERR(priv->gpio_lineout_sel),601 "Failed to get line out selection GPIO\n");602 603 priv->gpio_headset_detect = devm_gpiod_get_optional(dev,604 "headset-detect", GPIOD_IN);605 if (IS_ERR(priv->gpio_headset_detect))606 return dev_err_probe(dev, PTR_ERR(priv->gpio_headset_detect),607 "Failed to get headset jack detect GPIO\n");608 609 if (priv->gpio_headset_detect) {610 priv->adc_headset_detect = devm_iio_channel_get(dev,611 "headset-detect");612 if (IS_ERR(priv->adc_headset_detect))613 return dev_err_probe(dev,614 PTR_ERR(priv->adc_headset_detect),615 "Failed to get ADC channel\n");616 617 ret = iio_get_channel_type(priv->adc_headset_detect,618 &channel_type);619 if (ret) {620 dev_err(dev, "Failed to get ADC channel type\n");621 return ret;622 }623 624 if (channel_type != IIO_VOLTAGE) {625 dev_err(dev, "ADC channel is not voltage\n");626 return -EINVAL;627 }628 629 priv->gpio_headset_key = devm_gpiod_get(dev, "headset-key",630 GPIOD_IN);631 if (IS_ERR(priv->gpio_headset_key))632 return dev_err_probe(dev,633 PTR_ERR(priv->gpio_headset_key),634 "Failed to get headset key GPIO\n");635 636 ret = of_property_read_u32_array(dev->of_node,637 "samsung,headset-4pole-threshold-microvolt",638 fourpole_threshold,639 ARRAY_SIZE(fourpole_threshold));640 if (ret) {641 dev_err(dev, "Failed to get 4-pole jack detection threshold\n");642 return ret;643 }644 645 if (fourpole_threshold[0] > fourpole_threshold[1]) {646 dev_err(dev, "Invalid 4-pole jack detection threshold value\n");647 return -EINVAL;648 }649 650 headset_jack_zones[0].max_mv = (fourpole_threshold[0]);651 headset_jack_zones[1].min_mv = (fourpole_threshold[0] + 1);652 653 headset_jack_zones[1].max_mv = (fourpole_threshold[1]);654 headset_jack_zones[2].min_mv = (fourpole_threshold[1] + 1);655 656 ret = of_property_read_u32_array(dev->of_node,657 "samsung,headset-button-threshold-microvolt",658 button_threshold,659 ARRAY_SIZE(button_threshold));660 if (ret) {661 dev_err(dev, "Failed to get headset button detection threshold\n");662 return ret;663 }664 665 if (button_threshold[0] > button_threshold[1] ||666 button_threshold[1] > button_threshold[2]) {667 dev_err(dev, "Invalid headset button detection threshold value\n");668 return -EINVAL;669 }670 671 for (i = 0; i < 3; i++) {672 if (i != 0 && button_threshold[i] <= 0) {673 dev_err(dev, "Invalid headset button detection threshold value\n");674 return -EINVAL;675 }676 677 headset_key_zones[i].min_mv = button_threshold[i];678 679 if (i == 2)680 headset_key_zones[i].max_mv = UINT_MAX;681 else682 headset_key_zones[i].max_mv = \683 (button_threshold[i+1] - 1);684 }685 }686 687 ret = snd_soc_of_parse_card_name(card, "model");688 if (ret < 0) {689 dev_err(dev, "Card name is not specified\n");690 return ret;691 }692 693 ret = snd_soc_of_parse_audio_routing(card, "audio-routing");694 if (ret < 0) {695 /* Backwards compatible way */696 ret = snd_soc_of_parse_audio_routing(card, "samsung,audio-routing");697 if (ret < 0) {698 dev_err(dev, "Audio routing invalid/unspecified\n");699 return ret;700 }701 }702 703 cpu = of_get_child_by_name(dev->of_node, "cpu");704 if (!cpu)705 return -EINVAL;706 707 codec = of_get_child_by_name(dev->of_node, "codec");708 if (!codec) {709 of_node_put(cpu);710 return -EINVAL;711 }712 713 cpu_dai_node = of_parse_phandle(cpu, "sound-dai", 0);714 of_node_put(cpu);715 if (!cpu_dai_node) {716 dev_err(dev, "parsing cpu/sound-dai failed\n");717 of_node_put(codec);718 return -EINVAL;719 }720 721 codec_dai_node = of_parse_phandle(codec, "sound-dai", 0);722 of_node_put(codec);723 if (!codec_dai_node) {724 dev_err(dev, "audio-codec property invalid/missing\n");725 ret = -EINVAL;726 goto put_cpu_dai_node;727 }728 729 for_each_card_prelinks(card, i, dai_link) {730 dai_link->codecs->of_node = codec_dai_node;731 dai_link->cpus->of_node = cpu_dai_node;732 dai_link->platforms->of_node = cpu_dai_node;733 }734 735 ret = devm_snd_soc_register_component(dev, &midas_component,736 midas_ext_dai, ARRAY_SIZE(midas_ext_dai));737 if (ret < 0) {738 dev_err(dev, "Failed to register component: %d\n", ret);739 goto put_codec_dai_node;740 }741 742 ret = devm_snd_soc_register_card(dev, card);743 if (ret < 0) {744 dev_err(dev, "Failed to register card: %d\n", ret);745 goto put_codec_dai_node;746 }747 748 return 0;749 750put_codec_dai_node:751 of_node_put(codec_dai_node);752put_cpu_dai_node:753 of_node_put(cpu_dai_node);754 return ret;755}756 757static const struct of_device_id midas_of_match[] = {758 { .compatible = "samsung,midas-audio" },759 { },760};761MODULE_DEVICE_TABLE(of, midas_of_match);762 763static struct platform_driver midas_driver = {764 .driver = {765 .name = "midas-audio",766 .of_match_table = midas_of_match,767 .pm = &snd_soc_pm_ops,768 },769 .probe = midas_probe,770};771module_platform_driver(midas_driver);772 773MODULE_AUTHOR("Simon Shields <simon@lineageos.org>");774MODULE_DESCRIPTION("ASoC support for Midas");775MODULE_LICENSE("GPL v2");776