/* * wm8974.c -- WM8974 ALSA Soc Audio driver * * Copyright 2006-2009 Wolfson Microelectronics PLC. * * Author: Liam Girdwood <Liam.Girdwood@wolfsonmicro.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/i2c.h> #include <linux/regmap.h> #include <linux/slab.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include <sound/initval.h> #include <sound/tlv.h> #include "wm8974.h" static const struct reg_default wm8974_reg_defaults[] = { { 0, 0x0000 }, { 1, 0x0000 }, { 2, 0x0000 }, { 3, 0x0000 }, { 4, 0x0050 }, { 5, 0x0000 }, { 6, 0x0140 }, { 7, 0x0000 }, { 8, 0x0000 }, { 9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff }, { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff }, { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c }, { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 }, { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 }, { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 }, { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 }, { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 }, { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 }, { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 }, { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 }, { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 }, { 56, 0x0000 }, }; #define WM8974_POWER1_BIASEN 0x08 #define WM8974_POWER1_BUFIOEN 0x04 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0) static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" }; static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" }; static const char *wm8974_eqmode[] = {"Capture", "Playback" }; static const char *wm8974_bw[] = {"Narrow", "Wide" }; static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" }; static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" }; static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" }; static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" }; static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" }; static const char *wm8974_alc[] = {"ALC", "Limiter" }; static const struct soc_enum wm8974_enum[] = { SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */ SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */ SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp), SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode), SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1), SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw), SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2), SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw), SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3), SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw), SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4), SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw), SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5), SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc), }; static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" }; static const struct soc_enum wm8974_auxmode = SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text); static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); static const struct snd_kcontrol_new wm8974_snd_controls[] = { SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0), SOC_ENUM("DAC Companding", wm8974_enum[1]), SOC_ENUM("ADC Companding", wm8974_enum[0]), SOC_ENUM("Playback De-emphasis", wm8974_enum[2]), SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0), SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv), SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0), SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0), SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0), SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv), SOC_ENUM("Equaliser Function", wm8974_enum[3]), SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv), SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]), SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv), SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]), SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv), SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]), SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv), SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]), SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv), SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0), SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0), SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0), SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0), SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0), SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0), SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0), SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0), SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0), SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0), SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0), SOC_ENUM("ALC Capture Mode", wm8974_enum[13]), SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0), SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0), SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0), SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0), SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0), SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv), SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv), SOC_ENUM("Aux Mode", wm8974_auxmode), SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1), /* DAC / ADC oversampling */ SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0), SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0), }; /* Speaker Output Mixer */ static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = { SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0), SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0), SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0), }; /* Mono Output Mixer */ static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = { SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0), SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0), SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0), }; /* Boost mixer */ static const struct snd_kcontrol_new wm8974_boost_mixer[] = { SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0), }; /* Input PGA */ static const struct snd_kcontrol_new wm8974_inpga[] = { SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0), SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0), SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0), }; /* AUX Input boost vol */ static const struct snd_kcontrol_new wm8974_aux_boost_controls = SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0); /* Mic Input boost vol */ static const struct snd_kcontrol_new wm8974_mic_boost_controls = SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0); static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = { SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0, &wm8974_speaker_mixer_controls[0], ARRAY_SIZE(wm8974_speaker_mixer_controls)), SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0, &wm8974_mono_mixer_controls[0], ARRAY_SIZE(wm8974_mono_mixer_controls)), SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0), SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0), SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0), SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0), SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0), SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0), SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga, ARRAY_SIZE(wm8974_inpga)), SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)), SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0), SND_SOC_DAPM_INPUT("MICN"), SND_SOC_DAPM_INPUT("MICP"), SND_SOC_DAPM_INPUT("AUX"), SND_SOC_DAPM_OUTPUT("MONOOUT"), SND_SOC_DAPM_OUTPUT("SPKOUTP"), SND_SOC_DAPM_OUTPUT("SPKOUTN"), }; static const struct snd_soc_dapm_route wm8974_dapm_routes[] = { /* Mono output mixer */ {"Mono Mixer", "PCM Playback Switch", "DAC"}, {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, /* Speaker output mixer */ {"Speaker Mixer", "PCM Playback Switch", "DAC"}, {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, /* Outputs */ {"Mono Out", NULL, "Mono Mixer"}, {"MONOOUT", NULL, "Mono Out"}, {"SpkN Out", NULL, "Speaker Mixer"}, {"SpkP Out", NULL, "Speaker Mixer"}, {"SPKOUTN", NULL, "SpkN Out"}, {"SPKOUTP", NULL, "SpkP Out"}, /* Boost Mixer */ {"ADC", NULL, "Boost Mixer"}, {"Boost Mixer", "Aux Switch", "Aux Input"}, {"Boost Mixer", NULL, "Input PGA"}, {"Boost Mixer", NULL, "MICP"}, /* Input PGA */ {"Input PGA", "Aux Switch", "Aux Input"}, {"Input PGA", "MicN Switch", "MICN"}, {"Input PGA", "MicP Switch", "MICP"}, /* Inputs */ {"Aux Input", NULL, "AUX"}, }; struct pll_ { unsigned int pre_div:1; unsigned int n:4; unsigned int k; }; /* The size in bits of the pll divide multiplied by 10 * to allow rounding later */ #define FIXED_PLL_SIZE ((1 << 24) * 10) static void pll_factors(struct pll_ *pll_div, unsigned int target, unsigned int source) { unsigned long long Kpart; unsigned int K, Ndiv, Nmod; /* There is a fixed divide by 4 in the output path */ target *= 4; Ndiv = target / source; if (Ndiv < 6) { source /= 2; pll_div->pre_div = 1; Ndiv = target / source; } else pll_div->pre_div = 0; if ((Ndiv < 6) || (Ndiv > 12)) printk(KERN_WARNING "WM8974 N value %u outwith recommended range!\n", Ndiv); pll_div->n = Ndiv; Nmod = target % source; Kpart = FIXED_PLL_SIZE * (long long)Nmod; do_div(Kpart, source); K = Kpart & 0xFFFFFFFF; /* Check if we need to round */ if ((K % 10) >= 5) K += 5; /* Move down to proper range now rounding is done */ K /= 10; pll_div->k = K; } static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, int source, unsigned int freq_in, unsigned int freq_out) { struct snd_soc_codec *codec = codec_dai->codec; struct pll_ pll_div; u16 reg; if (freq_in == 0 || freq_out == 0) { /* Clock CODEC directly from MCLK */ reg = snd_soc_read(codec, WM8974_CLOCK); snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff); /* Turn off PLL */ reg = snd_soc_read(codec, WM8974_POWER1); snd_soc_write(codec, WM8974_POWER1, reg & 0x1df); return 0; } pll_factors(&pll_div, freq_out, freq_in); snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18); snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff); reg = snd_soc_read(codec, WM8974_POWER1); snd_soc_write(codec, WM8974_POWER1, reg | 0x020); /* Run CODEC from PLL instead of MCLK */ reg = snd_soc_read(codec, WM8974_CLOCK); snd_soc_write(codec, WM8974_CLOCK, reg | 0x100); return 0; } /* * Configure WM8974 clock dividers. */ static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, int div_id, int div) { struct snd_soc_codec *codec = codec_dai->codec; u16 reg; switch (div_id) { case WM8974_OPCLKDIV: reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf; snd_soc_write(codec, WM8974_GPIO, reg | div); break; case WM8974_MCLKDIV: reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f; snd_soc_write(codec, WM8974_CLOCK, reg | div); break; case WM8974_BCLKDIV: reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3; snd_soc_write(codec, WM8974_CLOCK, reg | div); break; default: return -EINVAL; } return 0; } static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u16 iface = 0; u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe; /* set master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: clk |= 0x0001; break; case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } /* interface format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: iface |= 0x0010; break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: iface |= 0x0008; break; case SND_SOC_DAIFMT_DSP_A: iface |= 0x00018; break; default: return -EINVAL; } /* clock inversion */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_IB_IF: iface |= 0x0180; break; case SND_SOC_DAIFMT_IB_NF: iface |= 0x0100; break; case SND_SOC_DAIFMT_NB_IF: iface |= 0x0080; break; default: return -EINVAL; } snd_soc_write(codec, WM8974_IFACE, iface); snd_soc_write(codec, WM8974_CLOCK, clk); return 0; } static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f; u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1; /* bit size */ switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: break; case SNDRV_PCM_FORMAT_S20_3LE: iface |= 0x0020; break; case SNDRV_PCM_FORMAT_S24_LE: iface |= 0x0040; break; case SNDRV_PCM_FORMAT_S32_LE: iface |= 0x0060; break; } /* filter coefficient */ switch (params_rate(params)) { case 8000: adn |= 0x5 << 1; break; case 11025: adn |= 0x4 << 1; break; case 16000: adn |= 0x3 << 1; break; case 22050: adn |= 0x2 << 1; break; case 32000: adn |= 0x1 << 1; break; case 44100: case 48000: break; } snd_soc_write(codec, WM8974_IFACE, iface); snd_soc_write(codec, WM8974_ADD, adn); return 0; } static int wm8974_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf; if (mute) snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40); else snd_soc_write(codec, WM8974_DAC, mute_reg); return 0; } /* liam need to make this lower power with dapm */ static int wm8974_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3; switch (level) { case SND_SOC_BIAS_ON: case SND_SOC_BIAS_PREPARE: power1 |= 0x1; /* VMID 50k */ snd_soc_write(codec, WM8974_POWER1, power1); break; case SND_SOC_BIAS_STANDBY: power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { regcache_sync(dev_get_regmap(codec->dev, NULL)); /* Initial cap charge at VMID 5k */ snd_soc_write(codec, WM8974_POWER1, power1 | 0x3); mdelay(100); } power1 |= 0x2; /* VMID 500k */ snd_soc_write(codec, WM8974_POWER1, power1); break; case SND_SOC_BIAS_OFF: snd_soc_write(codec, WM8974_POWER1, 0); snd_soc_write(codec, WM8974_POWER2, 0); snd_soc_write(codec, WM8974_POWER3, 0); break; } codec->dapm.bias_level = level; return 0; } #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000) #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE) static const struct snd_soc_dai_ops wm8974_ops = { .hw_params = wm8974_pcm_hw_params, .digital_mute = wm8974_mute, .set_fmt = wm8974_set_dai_fmt, .set_clkdiv = wm8974_set_dai_clkdiv, .set_pll = wm8974_set_dai_pll, }; static struct snd_soc_dai_driver wm8974_dai = { .name = "wm8974-hifi", .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 2, /* Only 1 channel of data */ .rates = WM8974_RATES, .formats = WM8974_FORMATS,}, .capture = { .stream_name = "Capture", .channels_min = 1, .channels_max = 2, /* Only 1 channel of data */ .rates = WM8974_RATES, .formats = WM8974_FORMATS,}, .ops = &wm8974_ops, .symmetric_rates = 1, }; static int wm8974_suspend(struct snd_soc_codec *codec) { wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int wm8974_resume(struct snd_soc_codec *codec) { wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); return 0; } static const struct regmap_config wm8974_regmap = { .reg_bits = 7, .val_bits = 9, .max_register = WM8974_MONOMIX, .reg_defaults = wm8974_reg_defaults, .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults), }; static int wm8974_probe(struct snd_soc_codec *codec) { int ret = 0; ret = wm8974_reset(codec); if (ret < 0) { dev_err(codec->dev, "Failed to issue reset\n"); return ret; } wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); return ret; } /* power down chip */ static int wm8974_remove(struct snd_soc_codec *codec) { wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static struct snd_soc_codec_driver soc_codec_dev_wm8974 = { .probe = wm8974_probe, .remove = wm8974_remove, .suspend = wm8974_suspend, .resume = wm8974_resume, .set_bias_level = wm8974_set_bias_level, .controls = wm8974_snd_controls, .num_controls = ARRAY_SIZE(wm8974_snd_controls), .dapm_widgets = wm8974_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets), .dapm_routes = wm8974_dapm_routes, .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes), }; static int wm8974_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct regmap *regmap; int ret; regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap); if (IS_ERR(regmap)) return PTR_ERR(regmap); ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm8974, &wm8974_dai, 1); return ret; } static int wm8974_i2c_remove(struct i2c_client *client) { snd_soc_unregister_codec(&client->dev); return 0; } static const struct i2c_device_id wm8974_i2c_id[] = { { "wm8974", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); static struct i2c_driver wm8974_i2c_driver = { .driver = { .name = "wm8974", .owner = THIS_MODULE, }, .probe = wm8974_i2c_probe, .remove = wm8974_i2c_remove, .id_table = wm8974_i2c_id, }; module_i2c_driver(wm8974_i2c_driver); MODULE_DESCRIPTION("ASoC WM8974 driver"); MODULE_AUTHOR("Liam Girdwood"); MODULE_LICENSE("GPL");