diff options
Diffstat (limited to 'sound/soc/codecs/wm8974.c')
| -rw-r--r-- | sound/soc/codecs/wm8974.c | 808 |
1 files changed, 808 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8974.c b/sound/soc/codecs/wm8974.c new file mode 100644 index 000000000000..d8a013ab3177 --- /dev/null +++ b/sound/soc/codecs/wm8974.c @@ -0,0 +1,808 @@ +/* + * wm8974.c -- WM8974 ALSA Soc Audio driver + * + * Copyright 2006-2009 Wolfson Microelectronics PLC. + * + * Author: Liam Girdwood <linux@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/version.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/pm.h> +#include <linux/i2c.h> +#include <linux/platform_device.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/initval.h> +#include <sound/tlv.h> + +#include "wm8974.h" + +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, +}; + +#define WM8974_POWER1_BIASEN 0x08 +#define WM8974_POWER1_BUFIOEN 0x10 + +struct wm8974_priv { + struct snd_soc_codec codec; + u16 reg_cache[WM8974_CACHEREGNUM]; +}; + +static struct snd_soc_codec *wm8974_codec; + +#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 Bandwith", 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 Bandwith", 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 Bandwith", 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 Bandwith", 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), +}; + +/* 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, 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_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 */ + {"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"}, +}; + +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 pre_div:4; /* prescale - 1 */ + unsigned int n:4; + unsigned int k; +}; + +static struct pll_ pll_div; + +/* 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(unsigned int target, unsigned int source) +{ + unsigned long long Kpart; + unsigned int K, Ndiv, Nmod; + + Ndiv = target / source; + if (Ndiv < 6) { + source >>= 1; + 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, unsigned int freq_in, unsigned int freq_out) +{ + struct snd_soc_codec *codec = codec_dai->codec; + 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(freq_out*4, 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_ADCCLK: + reg = snd_soc_read(codec, WM8974_ADC) & 0x1f7; + snd_soc_write(codec, WM8974_ADC, reg | div); + break; + case WM8974_DACCLK: + reg = snd_soc_read(codec, WM8974_DAC) & 0x1f7; + snd_soc_write(codec, WM8974_DAC, 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 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: + case SNDRV_PCM_RATE_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->bias_level == SND_SOC_BIAS_OFF) { + /* 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->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 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 = 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, +}; +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; +} + +static int wm8974_probe(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec; + int ret = 0; + + if (wm8974_codec == NULL) { + dev_err(&pdev->dev, "Codec device not registered\n"); + return -ENODEV; + } + + socdev->card->codec = wm8974_codec; + codec = wm8974_codec; + + /* register pcms */ + ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); + if (ret < 0) { + dev_err(codec->dev, "failed to create pcms: %d\n", ret); + goto pcm_err; + } + + snd_soc_add_controls(codec, wm8974_snd_controls, + ARRAY_SIZE(wm8974_snd_controls)); + wm8974_add_widgets(codec); + ret = snd_soc_init_card(socdev); + if (ret < 0) { + dev_err(codec->dev, "failed to register card: %d\n", ret); + goto card_err; + } + + return ret; + +card_err: + snd_soc_free_pcms(socdev); + snd_soc_dapm_free(socdev); +pcm_err: + return ret; +} + +/* power down chip */ +static int wm8974_remove(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + + snd_soc_free_pcms(socdev); + snd_soc_dapm_free(socdev); + + 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 __devinit int wm8974_register(struct wm8974_priv *wm8974) +{ + int ret; + struct snd_soc_codec *codec = &wm8974->codec; + + if (wm8974_codec) { + dev_err(codec->dev, "Another WM8974 is registered\n"); + return -EINVAL; + } + + mutex_init(&codec->mutex); + INIT_LIST_HEAD(&codec->dapm_widgets); + INIT_LIST_HEAD(&codec->dapm_paths); + + codec->private_data = wm8974; + codec->name = "WM8974"; + codec->owner = THIS_MODULE; + codec->bias_level = SND_SOC_BIAS_OFF; + codec->set_bias_level = wm8974_set_bias_level; + codec->dai = &wm8974_dai; + codec->num_dai = 1; + codec->reg_cache_size = WM8974_CACHEREGNUM; + codec->reg_cache = &wm8974->reg_cache; + + ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C); + if (ret < 0) { + dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); + goto err; + } + + memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg)); + + ret = wm8974_reset(codec); + if (ret < 0) { + dev_err(codec->dev, "Failed to issue reset\n"); + goto err; + } + + wm8974_dai.dev = codec->dev; + + wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY); + + wm8974_codec = codec; + + ret = snd_soc_register_codec(codec); + if (ret != 0) { + dev_err(codec->dev, "Failed to register codec: %d\n", ret); + goto err; + } + + ret = snd_soc_register_dai(&wm8974_dai); + if (ret != 0) { + dev_err(codec->dev, "Failed to register DAI: %d\n", ret); + goto err_codec; + } + + return 0; + +err_codec: + snd_soc_unregister_codec(codec); +err: + kfree(wm8974); + return ret; +} + +static __devexit void wm8974_unregister(struct wm8974_priv *wm8974) +{ + wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF); + snd_soc_unregister_dai(&wm8974_dai); + snd_soc_unregister_codec(&wm8974->codec); + kfree(wm8974); + wm8974_codec = NULL; +} + +static __devinit int wm8974_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct wm8974_priv *wm8974; + struct snd_soc_codec *codec; + + wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL); + if (wm8974 == NULL) + return -ENOMEM; + + codec = &wm8974->codec; + codec->hw_write = (hw_write_t)i2c_master_send; + + i2c_set_clientdata(i2c, wm8974); + codec->control_data = i2c; + + codec->dev = &i2c->dev; + + return wm8974_register(wm8974); +} + +static __devexit int wm8974_i2c_remove(struct i2c_client *client) +{ + struct wm8974_priv *wm8974 = i2c_get_clientdata(client); + wm8974_unregister(wm8974); + 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 = __devexit_p(wm8974_i2c_remove), + .id_table = wm8974_i2c_id, +}; + +static int __init wm8974_modinit(void) +{ + return i2c_add_driver(&wm8974_i2c_driver); +} +module_init(wm8974_modinit); + +static void __exit wm8974_exit(void) +{ + i2c_del_driver(&wm8974_i2c_driver); +} +module_exit(wm8974_exit); + +MODULE_DESCRIPTION("ASoC WM8974 driver"); +MODULE_AUTHOR("Liam Girdwood"); +MODULE_LICENSE("GPL"); |