soc/codecs/max9867.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 //
0003 // MAX9867 ALSA SoC codec driver
0004 //
0005 // Copyright 2013-2015 Maxim Integrated Products
0006 // Copyright 2018 Ladislav Michl <ladis@linux-mips.org>
0007 //
0008
0009 #include <linux/delay.h>
0010 #include <linux/i2c.h>
0011 #include <linux/module.h>
0012 #include <linux/regmap.h>
0013 #include <sound/pcm_params.h>
0014 #include <sound/soc.h>
0015 #include <sound/tlv.h>
0016 #include "max9867.h"
0017
0018 struct max9867_priv {
0019     struct regmap *regmap;
0020     const struct snd_pcm_hw_constraint_list *constraints;
0021     unsigned int sysclk, pclk;
0022     bool provider, dsp_a;
0023     unsigned int adc_dac_active;
0024 };
0025
0026 static const char *const max9867_spmode[] = {
0027     "Stereo Diff", "Mono Diff",
0028     "Stereo Cap", "Mono Cap",
0029     "Stereo Single", "Mono Single",
0030     "Stereo Single Fast", "Mono Single Fast"
0031 };
0032 static const char *const max9867_filter_text[] = {"IIR", "FIR"};
0033
0034 static const char *const max9867_adc_dac_filter_text[] = {
0035     "Disabled",
0036     "Elliptical/16/256",
0037     "Butterworth/16/500",
0038     "Elliptical/8/256",
0039     "Butterworth/8/500",
0040     "Butterworth/8-24"
0041 };
0042
0043 enum max9867_adc_dac {
0044     MAX9867_ADC_LEFT,
0045     MAX9867_ADC_RIGHT,
0046     MAX9867_DAC_LEFT,
0047     MAX9867_DAC_RIGHT,
0048 };
0049
0050 static int max9867_adc_dac_event(struct snd_soc_dapm_widget *w,
0051     struct snd_kcontrol *kcontrol, int event)
0052 {
0053     struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
0054     struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
0055     enum max9867_adc_dac adc_dac;
0056
0057     if (!strcmp(w->name, "ADCL"))
0058         adc_dac = MAX9867_ADC_LEFT;
0059     else if (!strcmp(w->name, "ADCR"))
0060         adc_dac = MAX9867_ADC_RIGHT;
0061     else if (!strcmp(w->name, "DACL"))
0062         adc_dac = MAX9867_DAC_LEFT;
0063     else if (!strcmp(w->name, "DACR"))
0064         adc_dac = MAX9867_DAC_RIGHT;
0065     else
0066         return 0;
0067
0068     if (SND_SOC_DAPM_EVENT_ON(event))
0069         max9867->adc_dac_active |= BIT(adc_dac);
0070     else if (SND_SOC_DAPM_EVENT_OFF(event))
0071         max9867->adc_dac_active &= ~BIT(adc_dac);
0072
0073     return 0;
0074 }
0075
0076 static int max9867_filter_get(struct snd_kcontrol *kcontrol,
0077                   struct snd_ctl_elem_value *ucontrol)
0078 {
0079     struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
0080     struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
0081     unsigned int reg;
0082     int ret;
0083
0084     ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, &reg);
0085     if (ret)
0086         return -EINVAL;
0087
0088     if (reg & MAX9867_CODECFLTR_MODE)
0089         ucontrol->value.enumerated.item[0] = 1;
0090     else
0091         ucontrol->value.enumerated.item[0] = 0;
0092
0093     return 0;
0094 }
0095
0096 static int max9867_filter_set(struct snd_kcontrol *kcontrol,
0097                   struct snd_ctl_elem_value *ucontrol)
0098 {
0099     struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
0100     struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
0101     unsigned int reg, mode = ucontrol->value.enumerated.item[0];
0102     int ret;
0103
0104     if (mode > 1)
0105         return -EINVAL;
0106
0107     /* don't allow change if ADC/DAC active */
0108     if (max9867->adc_dac_active)
0109         return -EBUSY;
0110
0111     /* read current filter mode */
0112     ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, &reg);
0113     if (ret)
0114         return -EINVAL;
0115
0116     if (mode)
0117         mode = MAX9867_CODECFLTR_MODE;
0118
0119     /* check if change is needed */
0120     if ((reg & MAX9867_CODECFLTR_MODE) == mode)
0121         return 0;
0122
0123     /* shutdown codec before switching filter mode */
0124     regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
0125         MAX9867_PWRMAN_SHDN, 0);
0126
0127     /* switch filter mode */
0128     regmap_update_bits(max9867->regmap, MAX9867_CODECFLTR,
0129         MAX9867_CODECFLTR_MODE, mode);
0130
0131     /* out of shutdown now */
0132     regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
0133         MAX9867_PWRMAN_SHDN, MAX9867_PWRMAN_SHDN);
0134
0135     return 0;
0136 }
0137
0138 static SOC_ENUM_SINGLE_EXT_DECL(max9867_filter, max9867_filter_text);
0139 static SOC_ENUM_SINGLE_DECL(max9867_dac_filter, MAX9867_CODECFLTR, 0,
0140     max9867_adc_dac_filter_text);
0141 static SOC_ENUM_SINGLE_DECL(max9867_adc_filter, MAX9867_CODECFLTR, 4,
0142     max9867_adc_dac_filter_text);
0143 static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,
0144     max9867_spmode);
0145 static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_master_tlv,
0146      0,  2, TLV_DB_SCALE_ITEM(-8600, 200, 1),
0147      3, 17, TLV_DB_SCALE_ITEM(-7800, 400, 0),
0148     18, 25, TLV_DB_SCALE_ITEM(-2000, 200, 0),
0149     26, 34, TLV_DB_SCALE_ITEM( -500, 100, 0),
0150     35, 40, TLV_DB_SCALE_ITEM(  350,  50, 0),
0151 );
0152 static DECLARE_TLV_DB_SCALE(max9867_mic_tlv, 0, 100, 0);
0153 static DECLARE_TLV_DB_SCALE(max9867_line_tlv, -600, 200, 0);
0154 static DECLARE_TLV_DB_SCALE(max9867_adc_tlv, -1200, 100, 0);
0155 static DECLARE_TLV_DB_SCALE(max9867_dac_tlv, -1500, 100, 0);
0156 static DECLARE_TLV_DB_SCALE(max9867_dacboost_tlv, 0, 600, 0);
0157 static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_micboost_tlv,
0158     0, 2, TLV_DB_SCALE_ITEM(-2000, 2000, 1),
0159     3, 3, TLV_DB_SCALE_ITEM(3000, 0, 0),
0160 );
0161
0162 static const struct snd_kcontrol_new max9867_snd_controls[] = {
0163     SOC_DOUBLE_R_TLV("Master Playback Volume", MAX9867_LEFTVOL,
0164             MAX9867_RIGHTVOL, 0, 40, 1, max9867_master_tlv),
0165     SOC_DOUBLE_R_TLV("Line Capture Volume", MAX9867_LEFTLINELVL,
0166             MAX9867_RIGHTLINELVL, 0, 15, 1, max9867_line_tlv),
0167     SOC_DOUBLE_R_TLV("Mic Capture Volume", MAX9867_LEFTMICGAIN,
0168             MAX9867_RIGHTMICGAIN, 0, 20, 1, max9867_mic_tlv),
0169     SOC_DOUBLE_R_TLV("Mic Boost Capture Volume", MAX9867_LEFTMICGAIN,
0170             MAX9867_RIGHTMICGAIN, 5, 3, 0, max9867_micboost_tlv),
0171     SOC_SINGLE("Digital Sidetone Volume", MAX9867_SIDETONE, 0, 31, 1),
0172     SOC_SINGLE_TLV("Digital Playback Volume", MAX9867_DACLEVEL, 0, 15, 1,
0173             max9867_dac_tlv),
0174     SOC_SINGLE_TLV("Digital Boost Playback Volume", MAX9867_DACLEVEL, 4, 3, 0,
0175             max9867_dacboost_tlv),
0176     SOC_DOUBLE_TLV("Digital Capture Volume", MAX9867_ADCLEVEL, 4, 0, 15, 1,
0177             max9867_adc_tlv),
0178     SOC_ENUM("Speaker Mode", max9867_spkmode),
0179     SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),
0180     SOC_SINGLE("Line ZC Switch", MAX9867_MODECONFIG, 5, 1, 0),
0181     SOC_ENUM_EXT("DSP Filter", max9867_filter, max9867_filter_get, max9867_filter_set),
0182     SOC_ENUM("ADC Filter", max9867_adc_filter),
0183     SOC_ENUM("DAC Filter", max9867_dac_filter),
0184     SOC_SINGLE("Mono Playback Switch", MAX9867_IFC1B, 3, 1, 0),
0185 };
0186
0187 /* Input mixer */
0188 static const struct snd_kcontrol_new max9867_input_mixer_controls[] = {
0189     SOC_DAPM_DOUBLE("Line Capture Switch", MAX9867_INPUTCONFIG, 7, 5, 1, 0),
0190     SOC_DAPM_DOUBLE("Mic Capture Switch", MAX9867_INPUTCONFIG, 6, 4, 1, 0),
0191 };
0192
0193 /* Output mixer */
0194 static const struct snd_kcontrol_new max9867_output_mixer_controls[] = {
0195     SOC_DAPM_DOUBLE_R("Line Bypass Switch",
0196               MAX9867_LEFTLINELVL, MAX9867_RIGHTLINELVL, 6, 1, 1),
0197 };
0198
0199 /* Sidetone mixer */
0200 static const struct snd_kcontrol_new max9867_sidetone_mixer_controls[] = {
0201     SOC_DAPM_DOUBLE("Sidetone Switch", MAX9867_SIDETONE, 6, 7, 1, 0),
0202 };
0203
0204 /* Line out switch */
0205 static const struct snd_kcontrol_new max9867_line_out_control =
0206     SOC_DAPM_DOUBLE_R("Switch",
0207               MAX9867_LEFTVOL, MAX9867_RIGHTVOL, 6, 1, 1);
0208
0209 /* DMIC mux */
0210 static const char *const dmic_mux_text[] = {
0211     "ADC", "DMIC"
0212 };
0213 static SOC_ENUM_SINGLE_DECL(left_dmic_mux_enum,
0214                 MAX9867_MICCONFIG, 5, dmic_mux_text);
0215 static SOC_ENUM_SINGLE_DECL(right_dmic_mux_enum,
0216                 MAX9867_MICCONFIG, 4, dmic_mux_text);
0217 static const struct snd_kcontrol_new max9867_left_dmic_mux =
0218     SOC_DAPM_ENUM("DMICL Mux", left_dmic_mux_enum);
0219 static const struct snd_kcontrol_new max9867_right_dmic_mux =
0220     SOC_DAPM_ENUM("DMICR Mux", right_dmic_mux_enum);
0221
0222 static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
0223     SND_SOC_DAPM_INPUT("MICL"),
0224     SND_SOC_DAPM_INPUT("MICR"),
0225     SND_SOC_DAPM_INPUT("DMICL"),
0226     SND_SOC_DAPM_INPUT("DMICR"),
0227     SND_SOC_DAPM_INPUT("LINL"),
0228     SND_SOC_DAPM_INPUT("LINR"),
0229
0230     SND_SOC_DAPM_PGA("Left Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
0231     SND_SOC_DAPM_PGA("Right Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
0232     SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
0233                      max9867_input_mixer_controls,
0234                      ARRAY_SIZE(max9867_input_mixer_controls)),
0235     SND_SOC_DAPM_MUX("DMICL Mux", SND_SOC_NOPM, 0, 0,
0236              &max9867_left_dmic_mux),
0237     SND_SOC_DAPM_MUX("DMICR Mux", SND_SOC_NOPM, 0, 0,
0238              &max9867_right_dmic_mux),
0239     SND_SOC_DAPM_ADC_E("ADCL", "HiFi Capture", SND_SOC_NOPM, 0, 0,
0240                max9867_adc_dac_event,
0241                SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
0242     SND_SOC_DAPM_ADC_E("ADCR", "HiFi Capture", SND_SOC_NOPM, 0, 0,
0243                max9867_adc_dac_event,
0244                SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
0245
0246     SND_SOC_DAPM_MIXER("Digital", SND_SOC_NOPM, 0, 0,
0247                max9867_sidetone_mixer_controls,
0248                ARRAY_SIZE(max9867_sidetone_mixer_controls)),
0249     SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", SND_SOC_NOPM, 0, 0,
0250                      max9867_output_mixer_controls,
0251                      ARRAY_SIZE(max9867_output_mixer_controls)),
0252     SND_SOC_DAPM_DAC_E("DACL", "HiFi Playback", SND_SOC_NOPM, 0, 0,
0253                max9867_adc_dac_event,
0254                SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
0255     SND_SOC_DAPM_DAC_E("DACR", "HiFi Playback", SND_SOC_NOPM, 0, 0,
0256                max9867_adc_dac_event,
0257                SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
0258     SND_SOC_DAPM_SWITCH("Master Playback", SND_SOC_NOPM, 0, 0,
0259                 &max9867_line_out_control),
0260     SND_SOC_DAPM_OUTPUT("LOUT"),
0261     SND_SOC_DAPM_OUTPUT("ROUT"),
0262 };
0263
0264 static const struct snd_soc_dapm_route max9867_audio_map[] = {
0265     {"Left Line Input", NULL, "LINL"},
0266     {"Right Line Input", NULL, "LINR"},
0267     {"Input Mixer", "Mic Capture Switch", "MICL"},
0268     {"Input Mixer", "Mic Capture Switch", "MICR"},
0269     {"Input Mixer", "Line Capture Switch", "Left Line Input"},
0270     {"Input Mixer", "Line Capture Switch", "Right Line Input"},
0271     {"DMICL Mux", "DMIC", "DMICL"},
0272     {"DMICR Mux", "DMIC", "DMICR"},
0273     {"DMICL Mux", "ADC", "Input Mixer"},
0274     {"DMICR Mux", "ADC", "Input Mixer"},
0275     {"ADCL", NULL, "DMICL Mux"},
0276     {"ADCR", NULL, "DMICR Mux"},
0277
0278     {"Digital", "Sidetone Switch", "ADCL"},
0279     {"Digital", "Sidetone Switch", "ADCR"},
0280     {"DACL", NULL, "Digital"},
0281     {"DACR", NULL, "Digital"},
0282
0283     {"Output Mixer", "Line Bypass Switch", "Left Line Input"},
0284     {"Output Mixer", "Line Bypass Switch", "Right Line Input"},
0285     {"Output Mixer", NULL, "DACL"},
0286     {"Output Mixer", NULL, "DACR"},
0287     {"Master Playback", "Switch", "Output Mixer"},
0288     {"LOUT", NULL, "Master Playback"},
0289     {"ROUT", NULL, "Master Playback"},
0290 };
0291
0292 static const unsigned int max9867_rates_44k1[] = {
0293     11025, 22050, 44100,
0294 };
0295
0296 static const struct snd_pcm_hw_constraint_list max9867_constraints_44k1 = {
0297     .list = max9867_rates_44k1,
0298     .count = ARRAY_SIZE(max9867_rates_44k1),
0299 };
0300
0301 static const unsigned int max9867_rates_48k[] = {
0302     8000, 16000, 32000, 48000,
0303 };
0304
0305 static const struct snd_pcm_hw_constraint_list max9867_constraints_48k = {
0306     .list = max9867_rates_48k,
0307     .count = ARRAY_SIZE(max9867_rates_48k),
0308 };
0309
0310 static int max9867_startup(struct snd_pcm_substream *substream,
0311                struct snd_soc_dai *dai)
0312 {
0313         struct max9867_priv *max9867 =
0314         snd_soc_component_get_drvdata(dai->component);
0315
0316     if (max9867->constraints)
0317         snd_pcm_hw_constraint_list(substream->runtime, 0,
0318             SNDRV_PCM_HW_PARAM_RATE, max9867->constraints);
0319
0320     return 0;
0321 }
0322
0323 static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
0324         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
0325 {
0326     int value;
0327     unsigned long int rate, ratio;
0328     struct snd_soc_component *component = dai->component;
0329     struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
0330     unsigned int ni = DIV_ROUND_CLOSEST_ULL(96ULL * 0x10000 * params_rate(params),
0331                         max9867->pclk);
0332
0333     /* set up the ni value */
0334     regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
0335         MAX9867_NI_HIGH_MASK, (0xFF00 & ni) >> 8);
0336     regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
0337         MAX9867_NI_LOW_MASK, 0x00FF & ni);
0338     if (max9867->provider) {
0339         if (max9867->dsp_a) {
0340             value = MAX9867_IFC1B_48X;
0341         } else {
0342             rate = params_rate(params) * 2 * params_width(params);
0343             ratio = max9867->pclk / rate;
0344             switch (params_width(params)) {
0345             case 8:
0346             case 16:
0347                 switch (ratio) {
0348                 case 2:
0349                     value = MAX9867_IFC1B_PCLK_2;
0350                     break;
0351                 case 4:
0352                     value = MAX9867_IFC1B_PCLK_4;
0353                     break;
0354                 case 8:
0355                     value = MAX9867_IFC1B_PCLK_8;
0356                     break;
0357                 case 16:
0358                     value = MAX9867_IFC1B_PCLK_16;
0359                     break;
0360                 default:
0361                     return -EINVAL;
0362                 }
0363                 break;
0364             case 24:
0365                 value = MAX9867_IFC1B_48X;
0366                 break;
0367             case 32:
0368                 value = MAX9867_IFC1B_64X;
0369                 break;
0370             default:
0371                 return -EINVAL;
0372             }
0373         }
0374         regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
0375             MAX9867_IFC1B_BCLK_MASK, value);
0376     } else {
0377         /*
0378          * digital pll locks on to any externally supplied LRCLK signal
0379          * and also enable rapid lock mode.
0380          */
0381         regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
0382             MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
0383         regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
0384             MAX9867_PLL, MAX9867_PLL);
0385     }
0386     return 0;
0387 }
0388
0389 static int max9867_mute(struct snd_soc_dai *dai, int mute, int direction)
0390 {
0391     struct snd_soc_component *component = dai->component;
0392     struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
0393
0394     return regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
0395                   1 << 6, !!mute << 6);
0396 }
0397
0398 static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
0399         int clk_id, unsigned int freq, int dir)
0400 {
0401     struct snd_soc_component *component = codec_dai->component;
0402     struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
0403     int value = 0;
0404
0405     /* Set the prescaler based on the master clock frequency*/
0406     if (freq >= 10000000 && freq <= 20000000) {
0407         value |= MAX9867_PSCLK_10_20;
0408         max9867->pclk = freq;
0409     } else if (freq >= 20000000 && freq <= 40000000) {
0410         value |= MAX9867_PSCLK_20_40;
0411         max9867->pclk = freq / 2;
0412     } else if (freq >= 40000000 && freq <= 60000000) {
0413         value |= MAX9867_PSCLK_40_60;
0414         max9867->pclk = freq / 4;
0415     } else {
0416         dev_err(component->dev,
0417             "Invalid clock frequency %uHz (required 10-60MHz)\n",
0418             freq);
0419         return -EINVAL;
0420     }
0421     if (freq % 48000 == 0)
0422         max9867->constraints = &max9867_constraints_48k;
0423     else if (freq % 44100 == 0)
0424         max9867->constraints = &max9867_constraints_44k1;
0425     else
0426         dev_warn(component->dev,
0427              "Unable to set exact rate with %uHz clock frequency\n",
0428              freq);
0429     max9867->sysclk = freq;
0430     value = value << MAX9867_PSCLK_SHIFT;
0431     /* exact integer mode is not supported */
0432     value &= ~MAX9867_FREQ_MASK;
0433     regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
0434             MAX9867_PSCLK_MASK, value);
0435     return 0;
0436 }
0437
0438 static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
0439         unsigned int fmt)
0440 {
0441     struct snd_soc_component *component = codec_dai->component;
0442     struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
0443     u8 iface1A, iface1B;
0444
0445     switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
0446     case SND_SOC_DAIFMT_CBP_CFP:
0447         max9867->provider = true;
0448         iface1A = MAX9867_MASTER;
0449         iface1B = MAX9867_IFC1B_48X;
0450         break;
0451     case SND_SOC_DAIFMT_CBC_CFC:
0452         max9867->provider = false;
0453         iface1A = iface1B = 0;
0454         break;
0455     default:
0456         return -EINVAL;
0457     }
0458
0459     switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
0460     case SND_SOC_DAIFMT_I2S:
0461         max9867->dsp_a = false;
0462         iface1A |= MAX9867_I2S_DLY;
0463         break;
0464     case SND_SOC_DAIFMT_DSP_A:
0465         max9867->dsp_a = true;
0466         iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ;
0467         break;
0468     default:
0469         return -EINVAL;
0470     }
0471
0472     /* Clock inversion bits, BCI and WCI */
0473     switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
0474     case SND_SOC_DAIFMT_NB_NF:
0475         break;
0476     case SND_SOC_DAIFMT_IB_IF:
0477         iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;
0478         break;
0479     case SND_SOC_DAIFMT_IB_NF:
0480         iface1A |= MAX9867_BCI_MODE;
0481         break;
0482     case SND_SOC_DAIFMT_NB_IF:
0483         iface1A |= MAX9867_WCI_MODE;
0484         break;
0485     default:
0486         return -EINVAL;
0487     }
0488
0489     regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
0490     regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
0491                MAX9867_IFC1B_BCLK_MASK, iface1B);
0492
0493     return 0;
0494 }
0495
0496 static const struct snd_soc_dai_ops max9867_dai_ops = {
0497     .set_sysclk = max9867_set_dai_sysclk,
0498     .set_fmt    = max9867_dai_set_fmt,
0499     .mute_stream    = max9867_mute,
0500     .startup    = max9867_startup,
0501     .hw_params  = max9867_dai_hw_params,
0502     .no_capture_mute = 1,
0503 };
0504
0505 static struct snd_soc_dai_driver max9867_dai[] = {
0506     {
0507     .name = "max9867-aif1",
0508     .playback = {
0509         .stream_name = "HiFi Playback",
0510         .channels_min = 2,
0511         .channels_max = 2,
0512         .rates = SNDRV_PCM_RATE_8000_48000,
0513         .formats = SNDRV_PCM_FMTBIT_S16_LE,
0514     },
0515     .capture = {
0516         .stream_name = "HiFi Capture",
0517         .channels_min = 2,
0518         .channels_max = 2,
0519         .rates = SNDRV_PCM_RATE_8000_48000,
0520         .formats = SNDRV_PCM_FMTBIT_S16_LE,
0521     },
0522     .ops = &max9867_dai_ops,
0523     .symmetric_rate = 1,
0524     }
0525 };
0526
0527 #ifdef CONFIG_PM
0528 static int max9867_suspend(struct snd_soc_component *component)
0529 {
0530     snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
0531
0532     return 0;
0533 }
0534
0535 static int max9867_resume(struct snd_soc_component *component)
0536 {
0537     snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
0538
0539     return 0;
0540 }
0541 #else
0542 #define max9867_suspend NULL
0543 #define max9867_resume  NULL
0544 #endif
0545
0546 static int max9867_set_bias_level(struct snd_soc_component *component,
0547                   enum snd_soc_bias_level level)
0548 {
0549     int err;
0550     struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
0551
0552     switch (level) {
0553     case SND_SOC_BIAS_STANDBY:
0554         if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
0555             err = regcache_sync(max9867->regmap);
0556             if (err)
0557                 return err;
0558
0559             err = regmap_write(max9867->regmap,
0560                        MAX9867_PWRMAN, 0xff);
0561             if (err)
0562                 return err;
0563         }
0564         break;
0565     case SND_SOC_BIAS_OFF:
0566         err = regmap_write(max9867->regmap, MAX9867_PWRMAN, 0);
0567         if (err)
0568             return err;
0569
0570         regcache_mark_dirty(max9867->regmap);
0571         break;
0572     default:
0573         break;
0574     }
0575
0576     return 0;
0577 }
0578
0579 static const struct snd_soc_component_driver max9867_component = {
0580     .controls       = max9867_snd_controls,
0581     .num_controls       = ARRAY_SIZE(max9867_snd_controls),
0582     .dapm_routes        = max9867_audio_map,
0583     .num_dapm_routes    = ARRAY_SIZE(max9867_audio_map),
0584     .dapm_widgets       = max9867_dapm_widgets,
0585     .num_dapm_widgets   = ARRAY_SIZE(max9867_dapm_widgets),
0586     .suspend        = max9867_suspend,
0587     .resume         = max9867_resume,
0588     .set_bias_level     = max9867_set_bias_level,
0589     .idle_bias_on       = 1,
0590     .use_pmdown_time    = 1,
0591     .endianness     = 1,
0592 };
0593
0594 static bool max9867_volatile_register(struct device *dev, unsigned int reg)
0595 {
0596     switch (reg) {
0597     case MAX9867_STATUS:
0598     case MAX9867_JACKSTATUS:
0599     case MAX9867_AUXHIGH:
0600     case MAX9867_AUXLOW:
0601         return true;
0602     default:
0603         return false;
0604     }
0605 }
0606
0607 static const struct regmap_config max9867_regmap = {
0608     .reg_bits   = 8,
0609     .val_bits   = 8,
0610     .max_register   = MAX9867_REVISION,
0611     .volatile_reg   = max9867_volatile_register,
0612     .cache_type = REGCACHE_RBTREE,
0613 };
0614
0615 static int max9867_i2c_probe(struct i2c_client *i2c)
0616 {
0617     struct max9867_priv *max9867;
0618     int ret, reg;
0619
0620     max9867 = devm_kzalloc(&i2c->dev, sizeof(*max9867), GFP_KERNEL);
0621     if (!max9867)
0622         return -ENOMEM;
0623
0624     i2c_set_clientdata(i2c, max9867);
0625     max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);
0626     if (IS_ERR(max9867->regmap)) {
0627         ret = PTR_ERR(max9867->regmap);
0628         dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
0629         return ret;
0630     }
0631     ret = regmap_read(max9867->regmap, MAX9867_REVISION, &reg);
0632     if (ret < 0) {
0633         dev_err(&i2c->dev, "Failed to read: %d\n", ret);
0634         return ret;
0635     }
0636     dev_info(&i2c->dev, "device revision: %x\n", reg);
0637     ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component,
0638             max9867_dai, ARRAY_SIZE(max9867_dai));
0639     if (ret < 0)
0640         dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
0641     return ret;
0642 }
0643
0644 static const struct i2c_device_id max9867_i2c_id[] = {
0645     { "max9867", 0 },
0646     { }
0647 };
0648 MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);
0649
0650 #ifdef CONFIG_OF
0651 static const struct of_device_id max9867_of_match[] = {
0652     { .compatible = "maxim,max9867", },
0653     { }
0654 };
0655 MODULE_DEVICE_TABLE(of, max9867_of_match);
0656 #endif
0657
0658 static struct i2c_driver max9867_i2c_driver = {
0659     .driver = {
0660         .name = "max9867",
0661         .of_match_table = of_match_ptr(max9867_of_match),
0662     },
0663     .probe_new  = max9867_i2c_probe,
0664     .id_table = max9867_i2c_id,
0665 };
0666
0667 module_i2c_driver(max9867_i2c_driver);
0668
0669 MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>");
0670 MODULE_DESCRIPTION("ASoC MAX9867 driver");
0671 MODULE_LICENSE("GPL");