diff options
Diffstat (limited to 'sound/soc/codecs/wm8940.c')
| -rw-r--r-- | sound/soc/codecs/wm8940.c | 955 |
1 files changed, 955 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c new file mode 100644 index 0000000..b8e17d6 --- /dev/null +++ b/sound/soc/codecs/wm8940.c @@ -0,0 +1,955 @@ +/* + * wm8940.c -- WM8940 ALSA Soc Audio driver + * + * Author: Jonathan Cameron <jic23@cam.ac.uk> + * + * Based on wm8510.c + * Copyright 2006 Wolfson Microelectronics PLC. + * Author: Liam Girdwood <lrg@slimlogic.co.uk> + * + * 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. + * + * Not currently handled: + * Notch filter control + * AUXMode (inverting vs mixer) + * No means to obtain current gain if alc enabled. + * No use made of gpio + * Fast VMID discharge for power down + * Soft Start + * DLR and ALR Swaps not enabled + * Digital Sidetone not supported + */ +#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/platform_device.h> +#include <linux/spi/spi.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 "wm8940.h" + +struct wm8940_priv { + unsigned int sysclk; + u16 reg_cache[WM8940_CACHEREGNUM]; + struct snd_soc_codec codec; +}; + +static u16 wm8940_reg_defaults[] = { + 0x8940, /* Soft Reset */ + 0x0000, /* Power 1 */ + 0x0000, /* Power 2 */ + 0x0000, /* Power 3 */ + 0x0010, /* Interface Control */ + 0x0000, /* Companding Control */ + 0x0140, /* Clock Control */ + 0x0000, /* Additional Controls */ + 0x0000, /* GPIO Control */ + 0x0002, /* Auto Increment Control */ + 0x0000, /* DAC Control */ + 0x00FF, /* DAC Volume */ + 0, + 0, + 0x0100, /* ADC Control */ + 0x00FF, /* ADC Volume */ + 0x0000, /* Notch Filter 1 Control 1 */ + 0x0000, /* Notch Filter 1 Control 2 */ + 0x0000, /* Notch Filter 2 Control 1 */ + 0x0000, /* Notch Filter 2 Control 2 */ + 0x0000, /* Notch Filter 3 Control 1 */ + 0x0000, /* Notch Filter 3 Control 2 */ + 0x0000, /* Notch Filter 4 Control 1 */ + 0x0000, /* Notch Filter 4 Control 2 */ + 0x0032, /* DAC Limit Control 1 */ + 0x0000, /* DAC Limit Control 2 */ + 0, + 0, + 0, + 0, + 0, + 0, + 0x0038, /* ALC Control 1 */ + 0x000B, /* ALC Control 2 */ + 0x0032, /* ALC Control 3 */ + 0x0000, /* Noise Gate */ + 0x0041, /* PLLN */ + 0x000C, /* PLLK1 */ + 0x0093, /* PLLK2 */ + 0x00E9, /* PLLK3 */ + 0, + 0, + 0x0030, /* ALC Control 4 */ + 0, + 0x0002, /* Input Control */ + 0x0050, /* PGA Gain */ + 0, + 0x0002, /* ADC Boost Control */ + 0, + 0x0002, /* Output Control */ + 0x0000, /* Speaker Mixer Control */ + 0, + 0, + 0, + 0x0079, /* Speaker Volume */ + 0, + 0x0000, /* Mono Mixer Control */ +}; + +static inline unsigned int wm8940_read_reg_cache(struct snd_soc_codec *codec, + unsigned int reg) +{ + u16 *cache = codec->reg_cache; + + if (reg >= ARRAY_SIZE(wm8940_reg_defaults)) + return -1; + + return cache[reg]; +} + +static inline int wm8940_write_reg_cache(struct snd_soc_codec *codec, + u16 reg, unsigned int value) +{ + u16 *cache = codec->reg_cache; + + if (reg >= ARRAY_SIZE(wm8940_reg_defaults)) + return -1; + + cache[reg] = value; + + return 0; +} + +static int wm8940_write(struct snd_soc_codec *codec, unsigned int reg, + unsigned int value) +{ + int ret; + u8 data[3] = { reg, + (value & 0xff00) >> 8, + (value & 0x00ff) + }; + + wm8940_write_reg_cache(codec, reg, value); + + ret = codec->hw_write(codec->control_data, data, 3); + + if (ret < 0) + return ret; + else if (ret != 3) + return -EIO; + return 0; +} + +static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" }; +static const struct soc_enum wm8940_adc_companding_enum += SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding); +static const struct soc_enum wm8940_dac_companding_enum += SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding); + +static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"}; +static const struct soc_enum wm8940_alc_mode_enum += SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text); + +static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"}; +static const struct soc_enum wm8940_mic_bias_level_enum += SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text); + +static const char *wm8940_filter_mode_text[] = {"Audio", "Application"}; +static const struct soc_enum wm8940_filter_mode_enum += SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text); + +static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1); +static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0); +static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0); +static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0); +static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0); +static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0); +static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0); +static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0); +static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1); +static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0); + +static const struct snd_kcontrol_new wm8940_snd_controls[] = { + SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL, + 6, 1, 0), + SOC_ENUM("DAC Companding", wm8940_dac_companding_enum), + SOC_ENUM("ADC Companding", wm8940_adc_companding_enum), + + SOC_ENUM("ALC Mode", wm8940_alc_mode_enum), + SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0), + SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1, + 3, 7, 1, wm8940_alc_max_tlv), + SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1, + 0, 7, 0, wm8940_alc_min_tlv), + SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2, + 0, 14, 0, wm8940_alc_tar_tlv), + SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0), + SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0), + SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0), + SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0), + SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE, + 3, 1, 0), + SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE, + 0, 7, 0), + + SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0), + SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0), + SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0), + SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2, + 4, 9, 1, wm8940_lim_thresh_tlv), + SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2, + 0, 12, 0, wm8940_lim_boost_tlv), + + SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0), + SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN, + 0, 63, 0, wm8940_pga_vol_tlv), + SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL, + 0, 255, 0, wm8940_adc_tlv), + SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL, + 0, 255, 0, wm8940_adc_tlv), + SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum), + SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST, + 8, 1, 0, wm8940_capture_boost_vol_tlv), + SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL, + 0, 63, 0, wm8940_spk_vol_tlv), + SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1), + + SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL, + 8, 1, 1, wm8940_att_tlv), + SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0), + + SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1), + SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX, + 7, 1, 1, wm8940_att_tlv), + + SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0), + SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum), + SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0), + SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0), + SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0), + SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0), + SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0), +}; + +static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = { + SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0), + SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0), + SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0), +}; + +static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = { + SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0), + SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0), + SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0), +}; + +static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1); +static const struct snd_kcontrol_new wm8940_input_boost_controls[] = { + SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1), + SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST, + 0, 7, 0, wm8940_boost_vol_tlv), + SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST, + 4, 7, 0, wm8940_boost_vol_tlv), +}; + +static const struct snd_kcontrol_new wm8940_micpga_controls[] = { + SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0), + SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0), + SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0), +}; + +static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = { + SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0, + &wm8940_speaker_mixer_controls[0], + ARRAY_SIZE(wm8940_speaker_mixer_controls)), + SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0, + &wm8940_mono_mixer_controls[0], + ARRAY_SIZE(wm8940_mono_mixer_controls)), + SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0), + + SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0), + SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0), + SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0), + SND_SOC_DAPM_OUTPUT("MONOOUT"), + SND_SOC_DAPM_OUTPUT("SPKOUTP"), + SND_SOC_DAPM_OUTPUT("SPKOUTN"), + + SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0), + SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0), + SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0, + &wm8940_micpga_controls[0], + ARRAY_SIZE(wm8940_micpga_controls)), + SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0, + &wm8940_input_boost_controls[0], + ARRAY_SIZE(wm8940_input_boost_controls)), + SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0), + + SND_SOC_DAPM_INPUT("MICN"), + SND_SOC_DAPM_INPUT("MICP"), + SND_SOC_DAPM_INPUT("AUX"), +}; + +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"}, + + /* Microphone PGA */ + {"Mic PGA", "MICN Switch", "MICN"}, + {"Mic PGA", "MICP Switch", "MICP"}, + {"Mic PGA", "AUX Switch", "AUX"}, + + /* Boost Mixer */ + {"Boost Mixer", "Mic PGA Switch", "Mic PGA"}, + {"Boost Mixer", "Mic Volume", "MICP"}, + {"Boost Mixer", "Aux Volume", "Aux Input"}, + + {"ADC", NULL, "Boost Mixer"}, +}; + +static int wm8940_add_widgets(struct snd_soc_codec *codec) +{ + int ret; + + ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets, + ARRAY_SIZE(wm8940_dapm_widgets)); + if (ret) + goto error_ret; + ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); + if (ret) + goto error_ret; + ret = snd_soc_dapm_new_widgets(codec); + +error_ret: + return ret; +} + +#define wm8940_reset(c) wm8940_write(c, WM8940_SOFTRESET, 0); + +static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai, + unsigned int fmt) +{ + struct snd_soc_codec *codec = codec_dai->codec; + u16 iface = wm8940_read_reg_cache(codec, WM8940_IFACE) & 0xFE67; + u16 clk = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0x1fe; + + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + clk |= 1; + break; + case SND_SOC_DAIFMT_CBS_CFS: + break; + default: + return -EINVAL; + } + wm8940_write(codec, WM8940_CLOCK, clk); + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + iface |= (2 << 3); + break; + case SND_SOC_DAIFMT_LEFT_J: + iface |= (1 << 3); + break; + case SND_SOC_DAIFMT_RIGHT_J: + break; + case SND_SOC_DAIFMT_DSP_A: + iface |= (3 << 3); + break; + case SND_SOC_DAIFMT_DSP_B: + iface |= (3 << 3) | (1 << 7); + break; + } + + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + case SND_SOC_DAIFMT_NB_IF: + iface |= (1 << 7); + break; + case SND_SOC_DAIFMT_IB_NF: + iface |= (1 << 8); + break; + case SND_SOC_DAIFMT_IB_IF: + iface |= (1 << 8) | (1 << 7); + break; + } + + wm8940_write(codec, WM8940_IFACE, iface); + + return 0; +} + +static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_device *socdev = rtd->socdev; + struct snd_soc_codec *codec = socdev->card->codec; + u16 iface = wm8940_read_reg_cache(codec, WM8940_IFACE) & 0xFD9F; + u16 addcntrl = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFF1; + u16 companding = wm8940_read_reg_cache(codec, + WM8940_COMPANDINGCTL) & 0xFFDF; + int ret; + + /* LoutR control */ + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE + && params_channels(params) == 2) + iface |= (1 << 9); + + switch (params_rate(params)) { + case SNDRV_PCM_RATE_8000: + addcntrl |= (0x5 << 1); + break; + case SNDRV_PCM_RATE_11025: + addcntrl |= (0x4 << 1); + break; + case SNDRV_PCM_RATE_16000: + addcntrl |= (0x3 << 1); + break; + case SNDRV_PCM_RATE_22050: + addcntrl |= (0x2 << 1); + break; + case SNDRV_PCM_RATE_32000: + addcntrl |= (0x1 << 1); + break; + case SNDRV_PCM_RATE_44100: + case SNDRV_PCM_RATE_48000: + break; + } + ret = wm8940_write(codec, WM8940_ADDCNTRL, addcntrl); + if (ret) + goto error_ret; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S8: + companding = companding | (1 << 5); + break; + case SNDRV_PCM_FORMAT_S16_LE: + break; + case SNDRV_PCM_FORMAT_S20_3LE: + iface |= (1 << 5); + break; + case SNDRV_PCM_FORMAT_S24_LE: + iface |= (2 << 5); + break; + case SNDRV_PCM_FORMAT_S32_LE: + iface |= (3 << 5); + break; + } + ret = wm8940_write(codec, WM8940_COMPANDINGCTL, companding); + if (ret) + goto error_ret; + ret = wm8940_write(codec, WM8940_IFACE, iface); + +error_ret: + return ret; +} + +static int wm8940_mute(struct snd_soc_dai *dai, int mute) +{ + struct snd_soc_codec *codec = dai->codec; + u16 mute_reg = wm8940_read_reg_cache(codec, WM8940_DAC) & 0xffbf; + + if (mute) + mute_reg |= 0x40; + + return wm8940_write(codec, WM8940_DAC, mute_reg); +} + +static int wm8940_set_bias_level(struct snd_soc_codec *codec, + enum snd_soc_bias_level level) +{ + u16 val; + u16 pwr_reg = wm8940_read_reg_cache(codec, WM8940_POWER1) & 0x1F0; + int ret = 0; + + switch (level) { + case SND_SOC_BIAS_ON: + /* ensure bufioen and biasen */ + pwr_reg |= (1 << 2) | (1 << 3); + /* Enable thermal shutdown */ + val = wm8940_read_reg_cache(codec, WM8940_OUTPUTCTL); + ret = wm8940_write(codec, WM8940_OUTPUTCTL, val | 0x2); + if (ret) + break; + /* set vmid to 75k */ + ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x1); + break; + case SND_SOC_BIAS_PREPARE: + /* ensure bufioen and biasen */ + pwr_reg |= (1 << 2) | (1 << 3); + ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x1); + break; + case SND_SOC_BIAS_STANDBY: + /* ensure bufioen and biasen */ + pwr_reg |= (1 << 2) | (1 << 3); + /* set vmid to 300k for standby */ + ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x2); + break; + case SND_SOC_BIAS_OFF: + ret = wm8940_write(codec, WM8940_POWER1, pwr_reg); + break; + } + + return ret; +} + +struct pll_ { + unsigned int pre_scale:2; + 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; + /* The left shift ist to avoid accuracy loss when right shifting */ + Ndiv = target / source; + + if (Ndiv > 12) { + source <<= 1; + /* Multiply by 2 */ + pll_div.pre_scale = 0; + Ndiv = target / source; + } else if (Ndiv < 3) { + source >>= 2; + /* Divide by 4 */ + pll_div.pre_scale = 3; + Ndiv = target / source; + } else if (Ndiv < 6) { + source >>= 1; + /* divide by 2 */ + pll_div.pre_scale = 2; + Ndiv = target / source; + } else + pll_div.pre_scale = 1; + + if ((Ndiv < 6) || (Ndiv > 12)) + printk(KERN_WARNING + "WM8940 N value %d outwith recommended range!d\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; +} + +/* Untested at the moment */ +static int wm8940_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; + + /* Turn off PLL */ + reg = wm8940_read_reg_cache(codec, WM8940_POWER1); + wm8940_write(codec, WM8940_POWER1, reg & 0x1df); + + if (freq_in == 0 || freq_out == 0) { + /* Clock CODEC directly from MCLK */ + reg = wm8940_read_reg_cache(codec, WM8940_CLOCK); + wm8940_write(codec, WM8940_CLOCK, reg & 0x0ff); + /* Pll power down */ + wm8940_write(codec, WM8940_PLLN, (1 << 7)); + return 0; + } + + /* Pll is followed by a frequency divide by 4 */ + pll_factors(freq_out*4, freq_in); + if (pll_div.k) + wm8940_write(codec, WM8940_PLLN, + (pll_div.pre_scale << 4) | pll_div.n | (1 << 6)); + else /* No factional component */ + wm8940_write(codec, WM8940_PLLN, + (pll_div.pre_scale << 4) | pll_div.n); + wm8940_write(codec, WM8940_PLLK1, pll_div.k >> 18); + wm8940_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff); + wm8940_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff); + /* Enable the PLL */ + reg = wm8940_read_reg_cache(codec, WM8940_POWER1); + wm8940_write(codec, WM8940_POWER1, reg | 0x020); + + /* Run CODEC from PLL instead of MCLK */ + reg = wm8940_read_reg_cache(codec, WM8940_CLOCK); + wm8940_write(codec, WM8940_CLOCK, reg | 0x100); + + return 0; +} + +static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai, + int clk_id, unsigned int freq, int dir) +{ + struct snd_soc_codec *codec = codec_dai->codec; + struct wm8940_priv *wm8940 = codec->private_data; + + switch (freq) { + case 11289600: + case 12000000: + case 12288000: + case 16934400: + case 18432000: + wm8940->sysclk = freq; + return 0; + } + return -EINVAL; +} + +static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai, + int div_id, int div) +{ + struct snd_soc_codec *codec = codec_dai->codec; + u16 reg; + int ret = 0; + + switch (div_id) { + case WM8940_BCLKDIV: + reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFFEF3; + ret = wm8940_write(codec, WM8940_CLOCK, reg | (div << 2)); + break; + case WM8940_MCLKDIV: + reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFF1F; + ret = wm8940_write(codec, WM8940_CLOCK, reg | (div << 5)); + break; + case WM8940_OPCLKDIV: + reg = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFCF; + ret = wm8940_write(codec, WM8940_ADDCNTRL, reg | (div << 4)); + break; + } + return ret; +} + +#define WM8940_RATES SNDRV_PCM_RATE_8000_48000 + +#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ + SNDRV_PCM_FMTBIT_S16_LE | \ + SNDRV_PCM_FMTBIT_S20_3LE | \ + SNDRV_PCM_FMTBIT_S24_LE | \ + SNDRV_PCM_FMTBIT_S32_LE) + +static struct snd_soc_dai_ops wm8940_dai_ops = { + .hw_params = wm8940_i2s_hw_params, + .set_sysclk = wm8940_set_dai_sysclk, + .digital_mute = wm8940_mute, + .set_fmt = wm8940_set_dai_fmt, + .set_clkdiv = wm8940_set_dai_clkdiv, + .set_pll = wm8940_set_dai_pll, +}; + +struct snd_soc_dai wm8940_dai = { + .name = "WM8940", + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = 2, + .rates = WM8940_RATES, + .formats = WM8940_FORMATS, + }, + .capture = { + .stream_name = "Capture", + .channels_min = 1, + .channels_max = 2, + .rates = WM8940_RATES, + .formats = WM8940_FORMATS, + }, + .ops = &wm8940_dai_ops, + .symmetric_rates = 1, +}; +EXPORT_SYMBOL_GPL(wm8940_dai); + +static int wm8940_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; + + return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); +} + +static int wm8940_resume(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + int i; + int ret; + u8 data[3]; + u16 *cache = codec->reg_cache; + + /* Sync reg_cache with the hardware + * Could use auto incremented writes to speed this up + */ + for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) { + data[0] = i; + data[1] = (cache[i] & 0xFF00) >> 8; + data[2] = cache[i] & 0x00FF; + ret = codec->hw_write(codec->control_data, data, 3); + if (ret < 0) + goto error_ret; + else if (ret != 3) { + ret = -EIO; + goto error_ret; + } + } + ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); + if (ret) + goto error_ret; + ret = wm8940_set_bias_level(codec, codec->suspend_bias_level); + +error_ret: + return ret; +} + +static struct snd_soc_codec *wm8940_codec; + +static int wm8940_probe(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec; + + int ret = 0; + + if (wm8940_codec == NULL) { + dev_err(&pdev->dev, "Codec device not registered\n"); + return -ENODEV; + } + + socdev->card->codec = wm8940_codec; + codec = wm8940_codec; + + mutex_init(&codec->mutex); + /* 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; + } + + ret = snd_soc_add_controls(codec, wm8940_snd_controls, + ARRAY_SIZE(wm8940_snd_controls)); + if (ret) + goto error_free_pcms; + ret = wm8940_add_widgets(codec); + if (ret) + goto error_free_pcms; + + ret = snd_soc_init_card(socdev); + if (ret < 0) { + dev_err(codec->dev, "failed to register card: %d\n", ret); + goto error_free_pcms; + } + + return ret; + +error_free_pcms: + snd_soc_free_pcms(socdev); + snd_soc_dapm_free(socdev); +pcm_err: + return ret; +} + +static int wm8940_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_wm8940 = { + .probe = wm8940_probe, + .remove = wm8940_remove, + .suspend = wm8940_suspend, + .resume = wm8940_resume, +}; +EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940); + +static int wm8940_register(struct wm8940_priv *wm8940) +{ + struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data; + struct snd_soc_codec *codec = &wm8940->codec; + int ret; + u16 reg; + if (wm8940_codec) { + dev_err(codec->dev, "Another WM8940 is registered\n"); + return -EINVAL; + } + + INIT_LIST_HEAD(&codec->dapm_widgets); + INIT_LIST_HEAD(&codec->dapm_paths); + + codec->private_data = wm8940; + codec->name = "WM8940"; + codec->owner = THIS_MODULE; + codec->read = wm8940_read_reg_cache; + codec->write = wm8940_write; + codec->bias_level = SND_SOC_BIAS_OFF; + codec->set_bias_level = wm8940_set_bias_level; + codec->dai = &wm8940_dai; + codec->num_dai = 1; + codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults); + codec->reg_cache = &wm8940->reg_cache; + + memcpy(codec->reg_cache, wm8940_reg_defaults, + sizeof(wm8940_reg_defaults)); + + ret = wm8940_reset(codec); + if (ret < 0) { + dev_err(codec->dev, "Failed to issue reset\n"); + return ret; + } + + wm8940_dai.dev = codec->dev; + + wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); + + ret = wm8940_write(codec, WM8940_POWER1, 0x180); + if (ret < 0) + return ret; + + if (!pdata) + dev_warn(codec->dev, "No platform data supplied\n"); + else { + reg = wm8940_read_reg_cache(codec, WM8940_OUTPUTCTL); + ret = wm8940_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi); + if (ret < 0) + return ret; + } + + + wm8940_codec = codec; + + ret = snd_soc_register_codec(codec); + if (ret) { + dev_err(codec->dev, "Failed to register codec: %d\n", ret); + return ret; + } + + ret = snd_soc_register_dai(&wm8940_dai); + if (ret) { + dev_err(codec->dev, "Failed to register DAI: %d\n", ret); + snd_soc_unregister_codec(codec); + return ret; + } + + return 0; +} + +static void wm8940_unregister(struct wm8940_priv *wm8940) +{ + wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF); + snd_soc_unregister_dai(&wm8940_dai); + snd_soc_unregister_codec(&wm8940->codec); + kfree(wm8940); + wm8940_codec = NULL; +} + +static int wm8940_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct wm8940_priv *wm8940; + struct snd_soc_codec *codec; + + wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL); + if (wm8940 == NULL) + return -ENOMEM; + + codec = &wm8940->codec; + codec->hw_write = (hw_write_t)i2c_master_send; + i2c_set_clientdata(i2c, wm8940); + codec->control_data = i2c; + codec->dev = &i2c->dev; + + return wm8940_register(wm8940); +} + +static int __devexit wm8940_i2c_remove(struct i2c_client *client) +{ + struct wm8940_priv *wm8940 = i2c_get_clientdata(client); + + wm8940_unregister(wm8940); + + return 0; +} + +static const struct i2c_device_id wm8940_i2c_id[] = { + { "wm8940", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id); + +static struct i2c_driver wm8940_i2c_driver = { + .driver = { + .name = "WM8940 I2C Codec", + .owner = THIS_MODULE, + }, + .probe = wm8940_i2c_probe, + .remove = __devexit_p(wm8940_i2c_remove), + .id_table = wm8940_i2c_id, +}; + +static int __init wm8940_modinit(void) +{ + int ret; + + ret = i2c_add_driver(&wm8940_i2c_driver); + if (ret) + printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n", + ret); + return ret; +} +module_init(wm8940_modinit); + +static void __exit wm8940_exit(void) +{ + i2c_del_driver(&wm8940_i2c_driver); +} +module_exit(wm8940_exit); + +MODULE_DESCRIPTION("ASoC WM8940 driver"); +MODULE_AUTHOR("Jonathan Cameron"); +MODULE_LICENSE("GPL"); |
