/* * wm8974.c -- WM8974 ALSA Soc Audio driver * * Copyright 2006 Wolfson Microelectronics PLC. * * Author: Liam Girdwood * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "wm8974.h" #define AUDIO_NAME "wm8974" #define WM8974_VERSION "0.6" struct snd_soc_codec_device soc_codec_dev_wm8974; /* * wm8974 register cache * We can't read the WM8974 register space when we are * using 2 wire for device control, so we cache them instead. */ static const u16 wm8974_reg[WM8974_CACHEREGNUM] = { 0x0000, 0x0000, 0x0000, 0x0000, 0x0050, 0x0000, 0x0140, 0x0000, 0x0000, 0x0000, 0x0000, 0x00ff, 0x0000, 0x0000, 0x0100, 0x00ff, 0x0000, 0x0000, 0x012c, 0x002c, 0x002c, 0x002c, 0x002c, 0x0000, 0x0032, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0038, 0x000b, 0x0032, 0x0000, 0x0008, 0x000c, 0x0093, 0x00e9, 0x0000, 0x0000, 0x0000, 0x0000, 0x0003, 0x0010, 0x0000, 0x0000, 0x0000, 0x0002, 0x0000, 0x0000, 0x0000, 0x0000, 0x0039, 0x0000, 0x0000, }; /* * read wm8974 register cache */ static inline unsigned int wm8974_read_reg_cache(struct snd_soc_codec * codec, unsigned int reg) { u16 *cache = codec->reg_cache; if (reg == WM8974_RESET) return 0; if (reg >= WM8974_CACHEREGNUM) return -1; return cache[reg]; } /* * write wm8974 register cache */ static inline void wm8974_write_reg_cache(struct snd_soc_codec *codec, u16 reg, unsigned int value) { u16 *cache = codec->reg_cache; if (reg >= WM8974_CACHEREGNUM) return; cache[reg] = value; } /* * write to the WM8974 register space */ static int wm8974_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { u8 data[2]; /* data is * D15..D9 WM8974 register offset * D8...D0 register data */ data[0] = (reg << 1) | ((value >> 8) & 0x0001); data[1] = value & 0x00ff; wm8974_write_reg_cache (codec, reg, value); if (codec->hw_write(codec->control_data, data, 2) == 2) return 0; else return -EIO; } #define wm8974_reset(c) wm8974_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 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("PCM Volume", WM8974_DACVOL, 0, 127, 0), 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_COMP, 0, 1, 0), SOC_SINGLE("Capture Volume", WM8974_ADCVOL, 0, 127, 0), SOC_ENUM("Equaliser Function", wm8974_enum[3]), SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), SOC_SINGLE("EQ1 Volume", WM8974_EQ1, 0, 31, 1), SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]), SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), SOC_SINGLE("EQ2 Volume", WM8974_EQ2, 0, 31, 1), SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]), SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), SOC_SINGLE("EQ3 Volume", WM8974_EQ3, 0, 31, 1), SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]), SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), SOC_SINGLE("EQ4 Volume", WM8974_EQ4, 0, 31, 1), SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]), SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), SOC_SINGLE("EQ5 Volume", WM8974_EQ5, 0, 31, 1), 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("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0), SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), SOC_SINGLE("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0), SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 0), }; /* add non dapm controls */ static int wm8974_add_controls(struct snd_soc_codec *codec) { int err, i; for (i = 0; i < ARRAY_SIZE(wm8974_snd_controls); i++) { err = snd_ctl_add(codec->card, snd_soc_cnew(&wm8974_snd_controls[i],codec, NULL)); if (err < 0) return err; } return 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, 1), }; /* 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, 1), }; /* 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); /* Capture boost switch */ static const struct snd_kcontrol_new wm8974_capture_boost_controls = SOC_DAPM_SINGLE("Capture Boost Switch", WM8974_INPPGA, 6, 1, 0); /* Aux In to PGA */ static const struct snd_kcontrol_new wm8974_aux_capture_boost_controls = SOC_DAPM_SINGLE("Aux Capture Boost Switch", WM8974_INPPGA, 2, 1, 0); /* Mic P In to PGA */ static const struct snd_kcontrol_new wm8974_micp_capture_boost_controls = SOC_DAPM_SINGLE("Mic P Capture Boost Switch", WM8974_INPPGA, 0, 1, 0); /* Mic N In to PGA */ static const struct snd_kcontrol_new wm8974_micn_capture_boost_controls = SOC_DAPM_SINGLE("Mic N Capture Boost Switch", WM8974_INPPGA, 1, 1, 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_POWER3, 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_PGA("Mic PGA", WM8974_POWER2, 2, 0, NULL, 0), SND_SOC_DAPM_PGA("Aux Boost", SND_SOC_NOPM, 0, 0, &wm8974_aux_boost_controls, 1), SND_SOC_DAPM_PGA("Mic Boost", SND_SOC_NOPM, 0, 0, &wm8974_mic_boost_controls, 1), SND_SOC_DAPM_SWITCH("Capture Boost", SND_SOC_NOPM, 0, 0, &wm8974_capture_boost_controls), SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, NULL, 0), SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 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 audio_map[] = { /* 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 */ {"Boost Mixer", NULL, "ADC"}, {"Capture Boost Switch", "Aux Capture Boost Switch", "AUX"}, {"Aux Boost", "Aux Volume", "Boost Mixer"}, {"Capture Boost", "Capture Switch", "Boost Mixer"}, {"Mic Boost", "Mic Volume", "Boost Mixer"}, /* Inputs */ {"MICP", NULL, "Mic Boost"}, {"MICN", NULL, "Mic PGA"}, {"Mic PGA", NULL, "Capture Boost"}, {"AUX", NULL, "Aux Input"}, }; static int wm8974_add_widgets(struct snd_soc_codec *codec) { snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets, ARRAY_SIZE(wm8974_dapm_widgets)); snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); snd_soc_dapm_new_widgets(codec); return 0; } struct pll_ { unsigned int in_hz, out_hz; unsigned int pre:4; /* prescale - 1 */ unsigned int n:4; unsigned int k; }; static struct pll_ pll[] = { {12000000, 11289600, 0, 7, 0x86c220}, {12000000, 12288000, 0, 8, 0x3126e8}, {13000000, 11289600, 0, 6, 0xf28bd4}, {13000000, 12288000, 0, 7, 0x8fd525}, {12288000, 11289600, 0, 7, 0x59999a}, {11289600, 12288000, 0, 8, 0x80dee9}, /* liam - add more entries */ }; static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, unsigned int freq_in, unsigned int freq_out) { struct snd_soc_codec *codec = codec_dai->codec; int i; u16 reg; if(freq_in == 0 || freq_out == 0) { reg = wm8974_read_reg_cache(codec, WM8974_POWER1); wm8974_write(codec, WM8974_POWER1, reg & 0x1df); return 0; } for(i = 0; i < ARRAY_SIZE(pll); i++) { if (freq_in == pll[i].in_hz && freq_out == pll[i].out_hz) { wm8974_write(codec, WM8974_PLLN, (pll[i].pre << 4) | pll[i].n); wm8974_write(codec, WM8974_PLLK1, pll[i].k >> 18); wm8974_write(codec, WM8974_PLLK2, (pll[i].k >> 9) & 0x1ff); wm8974_write(codec, WM8974_PLLK3, pll[i].k & 0x1ff); reg = wm8974_read_reg_cache(codec, WM8974_POWER1); wm8974_write(codec, WM8974_POWER1, reg | 0x020); return 0; } } return -EINVAL; } /* * 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 = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf; wm8974_write(codec, WM8974_GPIO, reg | div); break; case WM8974_MCLKDIV: reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f; wm8974_write(codec, WM8974_CLOCK, reg | div); break; case WM8974_ADCCLK: reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7; wm8974_write(codec, WM8974_ADC, reg | div); break; case WM8974_DACCLK: reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7; wm8974_write(codec, WM8974_DAC, reg | div); break; case WM8974_BCLKDIV: reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3; wm8974_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 = wm8974_read_reg_cache(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; } wm8974_write(codec, WM8974_IFACE, iface); wm8974_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 = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f; u16 adn = wm8974_read_reg_cache(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 SNDRV_PCM_RATE_8000: adn |= 0x5 << 1; break; case SNDRV_PCM_RATE_11025: adn |= 0x4 << 1; break; case SNDRV_PCM_RATE_16000: adn |= 0x3 << 1; break; case SNDRV_PCM_RATE_22050: adn |= 0x2 << 1; break; case SNDRV_PCM_RATE_32000: adn |= 0x1 << 1; break; case SNDRV_PCM_RATE_44100: break; } wm8974_write(codec, WM8974_IFACE, iface); wm8974_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 = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf; if(mute) wm8974_write(codec, WM8974_DAC, mute_reg | 0x40); else wm8974_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) { switch (level) { case SND_SOC_BIAS_ON: wm8974_write(codec, WM8974_POWER1, 0x1ff); wm8974_write(codec, WM8974_POWER2, 0x1ff); wm8974_write(codec, WM8974_POWER3, 0x1ff); break; case SND_SOC_BIAS_PREPARE: break; case SND_SOC_BIAS_STANDBY: break; case SND_SOC_BIAS_OFF: wm8974_write(codec, WM8974_POWER1, 0x0); wm8974_write(codec, WM8974_POWER2, 0x0); wm8974_write(codec, WM8974_POWER3, 0x0); break; } codec->bias_level = level; return 0; } #define WM8974_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \ SNDRV_PCM_RATE_48000) #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE) static 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, }; struct snd_soc_dai wm8974_dai = { .name = "WM8974 HiFi", .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 1, .rates = WM8974_RATES, .formats = WM8974_FORMATS,}, .capture = { .stream_name = "Capture", .channels_min = 1, .channels_max = 1, .rates = WM8974_RATES, .formats = WM8974_FORMATS,}, .ops = &wm8974_ops, }; EXPORT_SYMBOL_GPL(wm8974_dai); static int wm8974_suspend(struct platform_device *pdev, pm_message_t state) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int wm8974_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; int i; u8 data[2]; u16 *cache = codec->reg_cache; /* Sync reg_cache with the hardware */ for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) { data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); data[1] = cache[i] & 0x00ff; codec->hw_write(codec->control_data, data, 2); } wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); wm8974_set_bias_level(codec, codec->suspend_bias_level); return 0; } /* * initialise the WM8974 driver * register the mixer and dsp interfaces with the kernel */ static int wm8974_init(struct snd_soc_device *socdev) { struct snd_soc_codec *codec = socdev->card->codec; int ret = 0; codec->name = "WM8974"; codec->owner = THIS_MODULE; codec->read = wm8974_read_reg_cache; codec->write = wm8974_write; codec->set_bias_level = wm8974_set_bias_level; codec->dai = &wm8974_dai; codec->num_dai = 1; codec->reg_cache_size = ARRAY_SIZE(wm8974_reg); codec->reg_cache = kmemdup(wm8974_reg, sizeof(wm8974_reg), GFP_KERNEL); if (codec->reg_cache == NULL) return -ENOMEM; wm8974_reset(codec); /* register pcms */ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); if(ret < 0) { printk(KERN_ERR "wm8974: failed to create pcms\n"); goto pcm_err; } /* power on device */ wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); wm8974_add_controls(codec); wm8974_add_widgets(codec); ret = snd_soc_init_card(socdev); if (ret < 0) { printk(KERN_ERR "wm8974: failed to register card\n"); goto card_err; } return ret; card_err: snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); pcm_err: kfree(codec->reg_cache); return ret; } static struct snd_soc_device *wm8974_socdev; #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE) /* * WM8974 2 wire address is 0x1a */ #define I2C_DRIVERID_WM8974 0xfefe /* liam - need a proper id */ static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END }; /* Magic definition of all other variables and things */ I2C_CLIENT_INSMOD; static struct i2c_driver wm8974_i2c_driver; static struct i2c_client client_template; /* If the i2c layer weren't so broken, we could pass this kind of data around */ static int wm8974_codec_probe(struct i2c_adapter *adap, int addr, int kind) { struct snd_soc_device *socdev = wm8974_socdev; struct wm8974_setup_data *setup = socdev->codec_data; struct snd_soc_codec *codec = socdev->card->codec; struct i2c_client *i2c; int ret; if (addr != setup->i2c_address) return -ENODEV; client_template.adapter = adap; client_template.addr = addr; i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL); if (i2c == NULL) { kfree(codec); return -ENOMEM; } i2c_set_clientdata(i2c, codec); codec->control_data = i2c; ret = i2c_attach_client(i2c); if (ret < 0) { pr_err("failed to attach codec at addr %x\n", addr); goto err; } ret = wm8974_init(socdev); if (ret < 0) { pr_err("failed to initialise WM8974\n"); goto err; } return ret; err: kfree(codec); kfree(i2c); return ret; } static int wm8974_i2c_detach(struct i2c_client *client) { struct snd_soc_codec *codec = i2c_get_clientdata(client); i2c_detach_client(client); kfree(codec->reg_cache); kfree(client); return 0; } static int wm8974_i2c_attach(struct i2c_adapter *adap) { return i2c_probe(adap, &addr_data, wm8974_codec_probe); } /* corgi i2c codec control layer */ static struct i2c_driver wm8974_i2c_driver = { .driver = { .name = "WM8974 I2C Codec", .owner = THIS_MODULE, }, .id = I2C_DRIVERID_WM8974, .attach_adapter = wm8974_i2c_attach, .detach_client = wm8974_i2c_detach, .command = NULL, }; static struct i2c_client client_template = { .name = "WM8974", .driver = &wm8974_i2c_driver, }; #endif static int wm8974_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct wm8974_setup_data *setup; struct snd_soc_codec *codec; int ret = 0; pr_info("WM8974 Audio Codec %s", WM8974_VERSION); setup = socdev->codec_data; codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); if (codec == NULL) return -ENOMEM; socdev->card->codec = codec; mutex_init(&codec->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); wm8974_socdev = socdev; #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE) if (setup->i2c_address) { normal_i2c[0] = setup->i2c_address; codec->hw_write = (hw_write_t)i2c_master_send; ret = i2c_add_driver(&wm8974_i2c_driver); if (ret != 0) printk(KERN_ERR "can't add i2c driver"); } #else /* Add other interfaces here */ #endif return ret; } /* power down chip */ static int wm8974_remove(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; if (codec->control_data) wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF); snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE) i2c_del_driver(&wm8974_i2c_driver); #endif kfree(codec); return 0; } struct snd_soc_codec_device soc_codec_dev_wm8974 = { .probe = wm8974_probe, .remove = wm8974_remove, .suspend = wm8974_suspend, .resume = wm8974_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974); static int __init wm8974_modinit(void) { return snd_soc_register_dai(&wm8974_dai); } module_init(wm8974_modinit); static void __exit wm8974_exit(void) { snd_soc_unregister_dai(&wm8974_dai); } module_exit(wm8974_exit); MODULE_DESCRIPTION("ASoC WM8974 driver"); MODULE_AUTHOR("Liam Girdwood"); MODULE_LICENSE("GPL");