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1// SPDX-License-Identifier: GPL-2.02//3// MAX9867 ALSA SoC codec driver4//5// Copyright 2013-2015 Maxim Integrated Products6// Copyright 2018 Ladislav Michl <ladis@linux-mips.org>7//8 9#include <linux/clk.h>10#include <linux/delay.h>11#include <linux/i2c.h>12#include <linux/module.h>13#include <linux/regmap.h>14#include <sound/pcm_params.h>15#include <sound/soc.h>16#include <sound/tlv.h>17#include "max9867.h"18 19struct max9867_priv {20 struct clk *mclk;21 struct regmap *regmap;22 const struct snd_pcm_hw_constraint_list *constraints;23 unsigned int sysclk, pclk;24 bool provider, dsp_a;25 unsigned int adc_dac_active;26};27 28static const char *const max9867_spmode[] = {29 "Stereo Diff", "Mono Diff",30 "Stereo Cap", "Mono Cap",31 "Stereo Single", "Mono Single",32 "Stereo Single Fast", "Mono Single Fast"33};34static const char *const max9867_filter_text[] = {"IIR", "FIR"};35 36static const char *const max9867_adc_dac_filter_text[] = {37 "Disabled",38 "Elliptical/16/256",39 "Butterworth/16/500",40 "Elliptical/8/256",41 "Butterworth/8/500",42 "Butterworth/8-24"43};44 45enum max9867_adc_dac {46 MAX9867_ADC_LEFT,47 MAX9867_ADC_RIGHT,48 MAX9867_DAC_LEFT,49 MAX9867_DAC_RIGHT,50};51 52static int max9867_adc_dac_event(struct snd_soc_dapm_widget *w,53 struct snd_kcontrol *kcontrol, int event)54{55 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);56 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);57 enum max9867_adc_dac adc_dac;58 59 if (!snd_soc_dapm_widget_name_cmp(w, "ADCL"))60 adc_dac = MAX9867_ADC_LEFT;61 else if (!snd_soc_dapm_widget_name_cmp(w, "ADCR"))62 adc_dac = MAX9867_ADC_RIGHT;63 else if (!snd_soc_dapm_widget_name_cmp(w, "DACL"))64 adc_dac = MAX9867_DAC_LEFT;65 else if (!snd_soc_dapm_widget_name_cmp(w, "DACR"))66 adc_dac = MAX9867_DAC_RIGHT;67 else68 return 0;69 70 if (SND_SOC_DAPM_EVENT_ON(event))71 max9867->adc_dac_active |= BIT(adc_dac);72 else if (SND_SOC_DAPM_EVENT_OFF(event))73 max9867->adc_dac_active &= ~BIT(adc_dac);74 75 return 0;76}77 78static int max9867_filter_get(struct snd_kcontrol *kcontrol,79 struct snd_ctl_elem_value *ucontrol)80{81 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);82 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);83 unsigned int reg;84 int ret;85 86 ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, ®);87 if (ret)88 return -EINVAL;89 90 if (reg & MAX9867_CODECFLTR_MODE)91 ucontrol->value.enumerated.item[0] = 1;92 else93 ucontrol->value.enumerated.item[0] = 0;94 95 return 0;96}97 98static int max9867_filter_set(struct snd_kcontrol *kcontrol,99 struct snd_ctl_elem_value *ucontrol)100{101 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);102 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);103 unsigned int reg, mode = ucontrol->value.enumerated.item[0];104 int ret;105 106 if (mode > 1)107 return -EINVAL;108 109 /* don't allow change if ADC/DAC active */110 if (max9867->adc_dac_active)111 return -EBUSY;112 113 /* read current filter mode */114 ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, ®);115 if (ret)116 return -EINVAL;117 118 if (mode)119 mode = MAX9867_CODECFLTR_MODE;120 121 /* check if change is needed */122 if ((reg & MAX9867_CODECFLTR_MODE) == mode)123 return 0;124 125 /* shutdown codec before switching filter mode */126 regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,127 MAX9867_PWRMAN_SHDN, 0);128 129 /* switch filter mode */130 regmap_update_bits(max9867->regmap, MAX9867_CODECFLTR,131 MAX9867_CODECFLTR_MODE, mode);132 133 /* out of shutdown now */134 regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,135 MAX9867_PWRMAN_SHDN, MAX9867_PWRMAN_SHDN);136 137 return 0;138}139 140static SOC_ENUM_SINGLE_EXT_DECL(max9867_filter, max9867_filter_text);141static SOC_ENUM_SINGLE_DECL(max9867_dac_filter, MAX9867_CODECFLTR, 0,142 max9867_adc_dac_filter_text);143static SOC_ENUM_SINGLE_DECL(max9867_adc_filter, MAX9867_CODECFLTR, 4,144 max9867_adc_dac_filter_text);145static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,146 max9867_spmode);147static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_master_tlv,148 0, 2, TLV_DB_SCALE_ITEM(-8600, 200, 1),149 3, 17, TLV_DB_SCALE_ITEM(-7800, 400, 0),150 18, 25, TLV_DB_SCALE_ITEM(-2000, 200, 0),151 26, 34, TLV_DB_SCALE_ITEM( -500, 100, 0),152 35, 40, TLV_DB_SCALE_ITEM( 350, 50, 0),153);154static DECLARE_TLV_DB_SCALE(max9867_mic_tlv, 0, 100, 0);155static DECLARE_TLV_DB_SCALE(max9867_line_tlv, -600, 200, 0);156static DECLARE_TLV_DB_SCALE(max9867_adc_tlv, -1200, 100, 0);157static DECLARE_TLV_DB_SCALE(max9867_dac_tlv, -1500, 100, 0);158static DECLARE_TLV_DB_SCALE(max9867_dacboost_tlv, 0, 600, 0);159static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_micboost_tlv,160 0, 2, TLV_DB_SCALE_ITEM(-2000, 2000, 1),161 3, 3, TLV_DB_SCALE_ITEM(3000, 0, 0),162);163 164static const struct snd_kcontrol_new max9867_snd_controls[] = {165 SOC_DOUBLE_R_TLV("Master Playback Volume", MAX9867_LEFTVOL,166 MAX9867_RIGHTVOL, 0, 40, 1, max9867_master_tlv),167 SOC_DOUBLE_R_TLV("Line Capture Volume", MAX9867_LEFTLINELVL,168 MAX9867_RIGHTLINELVL, 0, 15, 1, max9867_line_tlv),169 SOC_DOUBLE_R_TLV("Mic Capture Volume", MAX9867_LEFTMICGAIN,170 MAX9867_RIGHTMICGAIN, 0, 20, 1, max9867_mic_tlv),171 SOC_DOUBLE_R_TLV("Mic Boost Capture Volume", MAX9867_LEFTMICGAIN,172 MAX9867_RIGHTMICGAIN, 5, 3, 0, max9867_micboost_tlv),173 SOC_SINGLE("Digital Sidetone Volume", MAX9867_SIDETONE, 0, 31, 1),174 SOC_SINGLE_TLV("Digital Playback Volume", MAX9867_DACLEVEL, 0, 15, 1,175 max9867_dac_tlv),176 SOC_SINGLE_TLV("Digital Boost Playback Volume", MAX9867_DACLEVEL, 4, 3, 0,177 max9867_dacboost_tlv),178 SOC_DOUBLE_TLV("Digital Capture Volume", MAX9867_ADCLEVEL, 4, 0, 15, 1,179 max9867_adc_tlv),180 SOC_ENUM("Speaker Mode", max9867_spkmode),181 SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),182 SOC_SINGLE("Line ZC Switch", MAX9867_MODECONFIG, 5, 1, 0),183 SOC_ENUM_EXT("DSP Filter", max9867_filter, max9867_filter_get, max9867_filter_set),184 SOC_ENUM("ADC Filter", max9867_adc_filter),185 SOC_ENUM("DAC Filter", max9867_dac_filter),186 SOC_SINGLE("Mono Playback Switch", MAX9867_IFC1B, 3, 1, 0),187};188 189/* Input mixer */190static const struct snd_kcontrol_new max9867_input_mixer_controls[] = {191 SOC_DAPM_DOUBLE("Line Capture Switch", MAX9867_INPUTCONFIG, 7, 5, 1, 0),192 SOC_DAPM_DOUBLE("Mic Capture Switch", MAX9867_INPUTCONFIG, 6, 4, 1, 0),193};194 195/* Output mixer */196static const struct snd_kcontrol_new max9867_output_mixer_controls[] = {197 SOC_DAPM_DOUBLE_R("Line Bypass Switch",198 MAX9867_LEFTLINELVL, MAX9867_RIGHTLINELVL, 6, 1, 1),199};200 201/* Sidetone mixer */202static const struct snd_kcontrol_new max9867_sidetone_mixer_controls[] = {203 SOC_DAPM_DOUBLE("Sidetone Switch", MAX9867_SIDETONE, 6, 7, 1, 0),204};205 206/* Line out switch */207static const struct snd_kcontrol_new max9867_line_out_control =208 SOC_DAPM_DOUBLE_R("Switch",209 MAX9867_LEFTVOL, MAX9867_RIGHTVOL, 6, 1, 1);210 211/* DMIC mux */212static const char *const dmic_mux_text[] = {213 "ADC", "DMIC"214};215static SOC_ENUM_SINGLE_DECL(left_dmic_mux_enum,216 MAX9867_MICCONFIG, 5, dmic_mux_text);217static SOC_ENUM_SINGLE_DECL(right_dmic_mux_enum,218 MAX9867_MICCONFIG, 4, dmic_mux_text);219static const struct snd_kcontrol_new max9867_left_dmic_mux =220 SOC_DAPM_ENUM("DMICL Mux", left_dmic_mux_enum);221static const struct snd_kcontrol_new max9867_right_dmic_mux =222 SOC_DAPM_ENUM("DMICR Mux", right_dmic_mux_enum);223 224static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {225 SND_SOC_DAPM_INPUT("MICL"),226 SND_SOC_DAPM_INPUT("MICR"),227 SND_SOC_DAPM_INPUT("DMICL"),228 SND_SOC_DAPM_INPUT("DMICR"),229 SND_SOC_DAPM_INPUT("LINL"),230 SND_SOC_DAPM_INPUT("LINR"),231 232 SND_SOC_DAPM_PGA("Left Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),233 SND_SOC_DAPM_PGA("Right Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),234 SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,235 max9867_input_mixer_controls,236 ARRAY_SIZE(max9867_input_mixer_controls)),237 SND_SOC_DAPM_MUX("DMICL Mux", SND_SOC_NOPM, 0, 0,238 &max9867_left_dmic_mux),239 SND_SOC_DAPM_MUX("DMICR Mux", SND_SOC_NOPM, 0, 0,240 &max9867_right_dmic_mux),241 SND_SOC_DAPM_ADC_E("ADCL", "HiFi Capture", SND_SOC_NOPM, 0, 0,242 max9867_adc_dac_event,243 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),244 SND_SOC_DAPM_ADC_E("ADCR", "HiFi Capture", SND_SOC_NOPM, 0, 0,245 max9867_adc_dac_event,246 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),247 248 SND_SOC_DAPM_MIXER("Digital", SND_SOC_NOPM, 0, 0,249 max9867_sidetone_mixer_controls,250 ARRAY_SIZE(max9867_sidetone_mixer_controls)),251 SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", SND_SOC_NOPM, 0, 0,252 max9867_output_mixer_controls,253 ARRAY_SIZE(max9867_output_mixer_controls)),254 SND_SOC_DAPM_DAC_E("DACL", "HiFi Playback", SND_SOC_NOPM, 0, 0,255 max9867_adc_dac_event,256 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),257 SND_SOC_DAPM_DAC_E("DACR", "HiFi Playback", SND_SOC_NOPM, 0, 0,258 max9867_adc_dac_event,259 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),260 SND_SOC_DAPM_SWITCH("Master Playback", SND_SOC_NOPM, 0, 0,261 &max9867_line_out_control),262 SND_SOC_DAPM_OUTPUT("LOUT"),263 SND_SOC_DAPM_OUTPUT("ROUT"),264};265 266static const struct snd_soc_dapm_route max9867_audio_map[] = {267 {"Left Line Input", NULL, "LINL"},268 {"Right Line Input", NULL, "LINR"},269 {"Input Mixer", "Mic Capture Switch", "MICL"},270 {"Input Mixer", "Mic Capture Switch", "MICR"},271 {"Input Mixer", "Line Capture Switch", "Left Line Input"},272 {"Input Mixer", "Line Capture Switch", "Right Line Input"},273 {"DMICL Mux", "DMIC", "DMICL"},274 {"DMICR Mux", "DMIC", "DMICR"},275 {"DMICL Mux", "ADC", "Input Mixer"},276 {"DMICR Mux", "ADC", "Input Mixer"},277 {"ADCL", NULL, "DMICL Mux"},278 {"ADCR", NULL, "DMICR Mux"},279 280 {"Digital", "Sidetone Switch", "ADCL"},281 {"Digital", "Sidetone Switch", "ADCR"},282 {"DACL", NULL, "Digital"},283 {"DACR", NULL, "Digital"},284 285 {"Output Mixer", "Line Bypass Switch", "Left Line Input"},286 {"Output Mixer", "Line Bypass Switch", "Right Line Input"},287 {"Output Mixer", NULL, "DACL"},288 {"Output Mixer", NULL, "DACR"},289 {"Master Playback", "Switch", "Output Mixer"},290 {"LOUT", NULL, "Master Playback"},291 {"ROUT", NULL, "Master Playback"},292};293 294static const unsigned int max9867_rates_44k1[] = {295 11025, 22050, 44100,296};297 298static const struct snd_pcm_hw_constraint_list max9867_constraints_44k1 = {299 .list = max9867_rates_44k1,300 .count = ARRAY_SIZE(max9867_rates_44k1),301};302 303static const unsigned int max9867_rates_48k[] = {304 8000, 16000, 32000, 48000,305};306 307static const struct snd_pcm_hw_constraint_list max9867_constraints_48k = {308 .list = max9867_rates_48k,309 .count = ARRAY_SIZE(max9867_rates_48k),310};311 312static int max9867_startup(struct snd_pcm_substream *substream,313 struct snd_soc_dai *dai)314{315 struct max9867_priv *max9867 =316 snd_soc_component_get_drvdata(dai->component);317 318 if (max9867->constraints)319 snd_pcm_hw_constraint_list(substream->runtime, 0,320 SNDRV_PCM_HW_PARAM_RATE, max9867->constraints);321 322 return 0;323}324 325static int max9867_dai_hw_params(struct snd_pcm_substream *substream,326 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)327{328 int value, freq = 0;329 unsigned long int rate, ratio;330 struct snd_soc_component *component = dai->component;331 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);332 unsigned int ni = DIV_ROUND_CLOSEST_ULL(96ULL * 0x10000 * params_rate(params),333 max9867->pclk);334 335 /* set up the ni value */336 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,337 MAX9867_NI_HIGH_MASK, (0xFF00 & ni) >> 8);338 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,339 MAX9867_NI_LOW_MASK, 0x00FF & ni);340 if (max9867->provider) {341 if (max9867->dsp_a) {342 value = MAX9867_IFC1B_48X;343 } else {344 rate = params_rate(params) * 2 * params_width(params);345 ratio = max9867->pclk / rate;346 switch (params_width(params)) {347 case 8:348 case 16:349 switch (ratio) {350 case 2:351 value = MAX9867_IFC1B_PCLK_2;352 break;353 case 4:354 value = MAX9867_IFC1B_PCLK_4;355 break;356 case 8:357 value = MAX9867_IFC1B_PCLK_8;358 break;359 case 16:360 value = MAX9867_IFC1B_PCLK_16;361 break;362 default:363 return -EINVAL;364 }365 break;366 case 24:367 value = MAX9867_IFC1B_48X;368 break;369 case 32:370 value = MAX9867_IFC1B_64X;371 break;372 default:373 return -EINVAL;374 }375 }376 regmap_update_bits(max9867->regmap, MAX9867_IFC1B,377 MAX9867_IFC1B_BCLK_MASK, value);378 379 /* Exact integer mode available for 8kHz and 16kHz sample rates380 * and certain PCLK (prescaled MCLK) values.381 */382 if (params_rate(params) == 8000 ||383 params_rate(params) == 16000) {384 switch (max9867->pclk) {385 case 12000000:386 freq = 0x08;387 break;388 case 13000000:389 freq = 0x0A;390 break;391 case 16000000:392 freq = 0x0C;393 break;394 case 19200000:395 freq = 0x0E;396 break;397 }398 }399 if (freq && params_rate(params) == 16000)400 freq++;401 402 /* If exact integer mode not available, the freq value403 * remains zero, i.e. normal mode is used.404 */405 regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,406 MAX9867_FREQ_MASK, freq);407 } else {408 /*409 * digital pll locks on to any externally supplied LRCLK signal410 * and also enable rapid lock mode.411 */412 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,413 MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);414 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,415 MAX9867_PLL, MAX9867_PLL);416 }417 return 0;418}419 420static int max9867_mute(struct snd_soc_dai *dai, int mute, int direction)421{422 struct snd_soc_component *component = dai->component;423 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);424 425 return regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,426 1 << 6, !!mute << 6);427}428 429static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,430 int clk_id, unsigned int freq, int dir)431{432 struct snd_soc_component *component = codec_dai->component;433 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);434 int value = 0;435 436 /* Set the prescaler based on the master clock frequency*/437 if (freq >= 10000000 && freq <= 20000000) {438 value |= MAX9867_PSCLK_10_20;439 max9867->pclk = freq;440 } else if (freq >= 20000000 && freq <= 40000000) {441 value |= MAX9867_PSCLK_20_40;442 max9867->pclk = freq / 2;443 } else if (freq >= 40000000 && freq <= 60000000) {444 value |= MAX9867_PSCLK_40_60;445 max9867->pclk = freq / 4;446 } else {447 dev_err(component->dev,448 "Invalid clock frequency %uHz (required 10-60MHz)\n",449 freq);450 return -EINVAL;451 }452 if (freq % 48000 == 0)453 max9867->constraints = &max9867_constraints_48k;454 else if (freq % 44100 == 0)455 max9867->constraints = &max9867_constraints_44k1;456 else457 dev_warn(component->dev,458 "Unable to set exact rate with %uHz clock frequency\n",459 freq);460 max9867->sysclk = freq;461 value = value << MAX9867_PSCLK_SHIFT;462 regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,463 MAX9867_PSCLK_MASK, value);464 return 0;465}466 467static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,468 unsigned int fmt)469{470 struct snd_soc_component *component = codec_dai->component;471 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);472 u8 iface1A, iface1B;473 474 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {475 case SND_SOC_DAIFMT_CBP_CFP:476 max9867->provider = true;477 iface1A = MAX9867_MASTER;478 iface1B = MAX9867_IFC1B_48X;479 break;480 case SND_SOC_DAIFMT_CBC_CFC:481 max9867->provider = false;482 iface1A = iface1B = 0;483 break;484 default:485 return -EINVAL;486 }487 488 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {489 case SND_SOC_DAIFMT_I2S:490 max9867->dsp_a = false;491 iface1A |= MAX9867_I2S_DLY;492 break;493 case SND_SOC_DAIFMT_DSP_A:494 max9867->dsp_a = true;495 iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ;496 break;497 default:498 return -EINVAL;499 }500 501 /* Clock inversion bits, BCI and WCI */502 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {503 case SND_SOC_DAIFMT_NB_NF:504 break;505 case SND_SOC_DAIFMT_IB_IF:506 iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;507 break;508 case SND_SOC_DAIFMT_IB_NF:509 iface1A |= MAX9867_BCI_MODE;510 break;511 case SND_SOC_DAIFMT_NB_IF:512 iface1A |= MAX9867_WCI_MODE;513 break;514 default:515 return -EINVAL;516 }517 518 regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);519 regmap_update_bits(max9867->regmap, MAX9867_IFC1B,520 MAX9867_IFC1B_BCLK_MASK, iface1B);521 522 return 0;523}524 525static const struct snd_soc_dai_ops max9867_dai_ops = {526 .set_sysclk = max9867_set_dai_sysclk,527 .set_fmt = max9867_dai_set_fmt,528 .mute_stream = max9867_mute,529 .startup = max9867_startup,530 .hw_params = max9867_dai_hw_params,531 .no_capture_mute = 1,532};533 534static struct snd_soc_dai_driver max9867_dai[] = {535 {536 .name = "max9867-aif1",537 .playback = {538 .stream_name = "HiFi Playback",539 .channels_min = 2,540 .channels_max = 2,541 .rates = SNDRV_PCM_RATE_8000_48000,542 .formats = SNDRV_PCM_FMTBIT_S16_LE,543 },544 .capture = {545 .stream_name = "HiFi Capture",546 .channels_min = 2,547 .channels_max = 2,548 .rates = SNDRV_PCM_RATE_8000_48000,549 .formats = SNDRV_PCM_FMTBIT_S16_LE,550 },551 .ops = &max9867_dai_ops,552 .symmetric_rate = 1,553 }554};555 556#ifdef CONFIG_PM557static int max9867_suspend(struct snd_soc_component *component)558{559 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);560 561 return 0;562}563 564static int max9867_resume(struct snd_soc_component *component)565{566 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);567 568 return 0;569}570#else571#define max9867_suspend NULL572#define max9867_resume NULL573#endif574 575static int max9867_set_bias_level(struct snd_soc_component *component,576 enum snd_soc_bias_level level)577{578 int err;579 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);580 581 switch (level) {582 case SND_SOC_BIAS_ON:583 err = clk_prepare_enable(max9867->mclk);584 if (err)585 return err;586 break;587 case SND_SOC_BIAS_STANDBY:588 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {589 err = regcache_sync(max9867->regmap);590 if (err)591 return err;592 593 err = regmap_write(max9867->regmap,594 MAX9867_PWRMAN, 0xff);595 if (err)596 return err;597 }598 break;599 case SND_SOC_BIAS_OFF:600 err = regmap_write(max9867->regmap, MAX9867_PWRMAN, 0);601 if (err)602 return err;603 604 regcache_mark_dirty(max9867->regmap);605 clk_disable_unprepare(max9867->mclk);606 break;607 default:608 break;609 }610 611 return 0;612}613 614static const struct snd_soc_component_driver max9867_component = {615 .controls = max9867_snd_controls,616 .num_controls = ARRAY_SIZE(max9867_snd_controls),617 .dapm_routes = max9867_audio_map,618 .num_dapm_routes = ARRAY_SIZE(max9867_audio_map),619 .dapm_widgets = max9867_dapm_widgets,620 .num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets),621 .suspend = max9867_suspend,622 .resume = max9867_resume,623 .set_bias_level = max9867_set_bias_level,624 .idle_bias_on = 1,625 .use_pmdown_time = 1,626 .endianness = 1,627};628 629static bool max9867_volatile_register(struct device *dev, unsigned int reg)630{631 switch (reg) {632 case MAX9867_STATUS:633 case MAX9867_JACKSTATUS:634 case MAX9867_AUXHIGH:635 case MAX9867_AUXLOW:636 return true;637 default:638 return false;639 }640}641 642static const struct regmap_config max9867_regmap = {643 .reg_bits = 8,644 .val_bits = 8,645 .max_register = MAX9867_REVISION,646 .volatile_reg = max9867_volatile_register,647 .cache_type = REGCACHE_RBTREE,648};649 650static int max9867_i2c_probe(struct i2c_client *i2c)651{652 struct max9867_priv *max9867;653 int ret, reg;654 655 max9867 = devm_kzalloc(&i2c->dev, sizeof(*max9867), GFP_KERNEL);656 if (!max9867)657 return -ENOMEM;658 659 i2c_set_clientdata(i2c, max9867);660 max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);661 if (IS_ERR(max9867->regmap)) {662 ret = PTR_ERR(max9867->regmap);663 dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);664 return ret;665 }666 ret = regmap_read(max9867->regmap, MAX9867_REVISION, ®);667 if (ret < 0) {668 dev_err(&i2c->dev, "Failed to read: %d\n", ret);669 return ret;670 }671 dev_info(&i2c->dev, "device revision: %x\n", reg);672 ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component,673 max9867_dai, ARRAY_SIZE(max9867_dai));674 if (ret < 0) {675 dev_err(&i2c->dev, "Failed to register component: %d\n", ret);676 return ret;677 }678 679 max9867->mclk = devm_clk_get(&i2c->dev, NULL);680 if (IS_ERR(max9867->mclk))681 return PTR_ERR(max9867->mclk);682 683 return 0;684}685 686static const struct i2c_device_id max9867_i2c_id[] = {687 { "max9867" },688 { }689};690MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);691 692#ifdef CONFIG_OF693static const struct of_device_id max9867_of_match[] = {694 { .compatible = "maxim,max9867", },695 { }696};697MODULE_DEVICE_TABLE(of, max9867_of_match);698#endif699 700static struct i2c_driver max9867_i2c_driver = {701 .driver = {702 .name = "max9867",703 .of_match_table = of_match_ptr(max9867_of_match),704 },705 .probe = max9867_i2c_probe,706 .id_table = max9867_i2c_id,707};708 709module_i2c_driver(max9867_i2c_driver);710 711MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>");712MODULE_DESCRIPTION("ASoC MAX9867 driver");713MODULE_LICENSE("GPL");714