diff options
Diffstat (limited to 'sound/soc/codecs/wm8940.c')
| -rw-r--r-- | sound/soc/codecs/wm8940.c | 871 |
1 files changed, 871 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c new file mode 100644 index 000000000..b9432f8b6 --- /dev/null +++ b/sound/soc/codecs/wm8940.c @@ -0,0 +1,871 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 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> + * + * 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/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 "wm8940.h" + +struct wm8940_priv { + unsigned int mclk; + unsigned int fs; + + struct regmap *regmap; +}; + +static bool wm8940_volatile_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case WM8940_SOFTRESET: + return true; + default: + return false; + } +} + +static bool wm8940_readable_register(struct device *dev, unsigned int reg) +{ + switch (reg) { + case WM8940_SOFTRESET: + case WM8940_POWER1: + case WM8940_POWER2: + case WM8940_POWER3: + case WM8940_IFACE: + case WM8940_COMPANDINGCTL: + case WM8940_CLOCK: + case WM8940_ADDCNTRL: + case WM8940_GPIO: + case WM8940_CTLINT: + case WM8940_DAC: + case WM8940_DACVOL: + case WM8940_ADC: + case WM8940_ADCVOL: + case WM8940_NOTCH1: + case WM8940_NOTCH2: + case WM8940_NOTCH3: + case WM8940_NOTCH4: + case WM8940_NOTCH5: + case WM8940_NOTCH6: + case WM8940_NOTCH7: + case WM8940_NOTCH8: + case WM8940_DACLIM1: + case WM8940_DACLIM2: + case WM8940_ALC1: + case WM8940_ALC2: + case WM8940_ALC3: + case WM8940_NOISEGATE: + case WM8940_PLLN: + case WM8940_PLLK1: + case WM8940_PLLK2: + case WM8940_PLLK3: + case WM8940_ALC4: + case WM8940_INPUTCTL: + case WM8940_PGAGAIN: + case WM8940_ADCBOOST: + case WM8940_OUTPUTCTL: + case WM8940_SPKMIX: + case WM8940_SPKVOL: + case WM8940_MONOMIX: + return true; + default: + return false; + } +} + +static const struct reg_default wm8940_reg_defaults[] = { + { 0x1, 0x0000 }, /* Power 1 */ + { 0x2, 0x0000 }, /* Power 2 */ + { 0x3, 0x0000 }, /* Power 3 */ + { 0x4, 0x0010 }, /* Interface Control */ + { 0x5, 0x0000 }, /* Companding Control */ + { 0x6, 0x0140 }, /* Clock Control */ + { 0x7, 0x0000 }, /* Additional Controls */ + { 0x8, 0x0000 }, /* GPIO Control */ + { 0x9, 0x0002 }, /* Auto Increment Control */ + { 0xa, 0x0000 }, /* DAC Control */ + { 0xb, 0x00FF }, /* DAC Volume */ + + { 0xe, 0x0100 }, /* ADC Control */ + { 0xf, 0x00FF }, /* ADC Volume */ + { 0x10, 0x0000 }, /* Notch Filter 1 Control 1 */ + { 0x11, 0x0000 }, /* Notch Filter 1 Control 2 */ + { 0x12, 0x0000 }, /* Notch Filter 2 Control 1 */ + { 0x13, 0x0000 }, /* Notch Filter 2 Control 2 */ + { 0x14, 0x0000 }, /* Notch Filter 3 Control 1 */ + { 0x15, 0x0000 }, /* Notch Filter 3 Control 2 */ + { 0x16, 0x0000 }, /* Notch Filter 4 Control 1 */ + { 0x17, 0x0000 }, /* Notch Filter 4 Control 2 */ + { 0x18, 0x0032 }, /* DAC Limit Control 1 */ + { 0x19, 0x0000 }, /* DAC Limit Control 2 */ + + { 0x20, 0x0038 }, /* ALC Control 1 */ + { 0x21, 0x000B }, /* ALC Control 2 */ + { 0x22, 0x0032 }, /* ALC Control 3 */ + { 0x23, 0x0000 }, /* Noise Gate */ + { 0x24, 0x0041 }, /* PLLN */ + { 0x25, 0x000C }, /* PLLK1 */ + { 0x26, 0x0093 }, /* PLLK2 */ + { 0x27, 0x00E9 }, /* PLLK3 */ + + { 0x2a, 0x0030 }, /* ALC Control 4 */ + + { 0x2c, 0x0002 }, /* Input Control */ + { 0x2d, 0x0050 }, /* PGA Gain */ + + { 0x2f, 0x0002 }, /* ADC Boost Control */ + + { 0x31, 0x0002 }, /* Output Control */ + { 0x32, 0x0000 }, /* Speaker Mixer Control */ + + { 0x36, 0x0079 }, /* Speaker Volume */ + + { 0x38, 0x0000 }, /* Mono Mixer Control */ +}; + +static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" }; +static SOC_ENUM_SINGLE_DECL(wm8940_adc_companding_enum, + WM8940_COMPANDINGCTL, 1, wm8940_companding); +static SOC_ENUM_SINGLE_DECL(wm8940_dac_companding_enum, + WM8940_COMPANDINGCTL, 3, wm8940_companding); + +static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"}; +static SOC_ENUM_SINGLE_DECL(wm8940_alc_mode_enum, + WM8940_ALC3, 8, wm8940_alc_mode_text); + +static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"}; +static SOC_ENUM_SINGLE_DECL(wm8940_mic_bias_level_enum, + WM8940_INPUTCTL, 8, wm8940_mic_bias_level_text); + +static const char *wm8940_filter_mode_text[] = {"Audio", "Application"}; +static SOC_ENUM_SINGLE_DECL(wm8940_filter_mode_enum, + WM8940_ADC, 7, 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 wm8940_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"}, + + /* 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"}, +}; + +#define wm8940_reset(c) snd_soc_component_write(c, WM8940_SOFTRESET, 0); + +static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai, + unsigned int fmt) +{ + struct snd_soc_component *component = codec_dai->component; + u16 iface = snd_soc_component_read(component, WM8940_IFACE) & 0xFE67; + u16 clk = snd_soc_component_read(component, 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; + } + snd_soc_component_write(component, 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; + } + + snd_soc_component_write(component, WM8940_IFACE, iface); + + return 0; +} + +static int wm8940_update_clocks(struct snd_soc_dai *dai); +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_component *component = dai->component; + struct wm8940_priv *priv = snd_soc_component_get_drvdata(component); + u16 iface = snd_soc_component_read(component, WM8940_IFACE) & 0xFD9F; + u16 addcntrl = snd_soc_component_read(component, WM8940_ADDCNTRL) & 0xFFF1; + u16 companding = snd_soc_component_read(component, + WM8940_COMPANDINGCTL) & 0xFFDF; + int ret; + + priv->fs = params_rate(params); + ret = wm8940_update_clocks(dai); + if (ret) + return ret; + + /* LoutR control */ + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE + && params_channels(params) == 2) + iface |= (1 << 9); + + switch (params_rate(params)) { + case 8000: + addcntrl |= (0x5 << 1); + break; + case 11025: + addcntrl |= (0x4 << 1); + break; + case 16000: + addcntrl |= (0x3 << 1); + break; + case 22050: + addcntrl |= (0x2 << 1); + break; + case 32000: + addcntrl |= (0x1 << 1); + break; + case 44100: + case 48000: + break; + } + ret = snd_soc_component_write(component, WM8940_ADDCNTRL, addcntrl); + if (ret) + goto error_ret; + + switch (params_width(params)) { + case 8: + companding = companding | (1 << 5); + break; + case 16: + break; + case 20: + iface |= (1 << 5); + break; + case 24: + iface |= (2 << 5); + break; + case 32: + iface |= (3 << 5); + break; + } + ret = snd_soc_component_write(component, WM8940_COMPANDINGCTL, companding); + if (ret) + goto error_ret; + ret = snd_soc_component_write(component, WM8940_IFACE, iface); + +error_ret: + return ret; +} + +static int wm8940_mute(struct snd_soc_dai *dai, int mute, int direction) +{ + struct snd_soc_component *component = dai->component; + u16 mute_reg = snd_soc_component_read(component, WM8940_DAC) & 0xffbf; + + if (mute) + mute_reg |= 0x40; + + return snd_soc_component_write(component, WM8940_DAC, mute_reg); +} + +static int wm8940_set_bias_level(struct snd_soc_component *component, + enum snd_soc_bias_level level) +{ + struct wm8940_priv *wm8940 = snd_soc_component_get_drvdata(component); + u16 val; + u16 pwr_reg = snd_soc_component_read(component, 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 = snd_soc_component_read(component, WM8940_OUTPUTCTL); + ret = snd_soc_component_write(component, WM8940_OUTPUTCTL, val | 0x2); + if (ret) + break; + /* set vmid to 75k */ + ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0x1); + break; + case SND_SOC_BIAS_PREPARE: + /* ensure bufioen and biasen */ + pwr_reg |= (1 << 2) | (1 << 3); + ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0x1); + break; + case SND_SOC_BIAS_STANDBY: + if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) { + ret = regcache_sync(wm8940->regmap); + if (ret < 0) { + dev_err(component->dev, "Failed to sync cache: %d\n", ret); + return ret; + } + } + + /* ensure bufioen and biasen */ + pwr_reg |= (1 << 2) | (1 << 3); + /* set vmid to 300k for standby */ + ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0x2); + break; + case SND_SOC_BIAS_OFF: + ret = snd_soc_component_write(component, 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, + int source, unsigned int freq_in, unsigned int freq_out) +{ + struct snd_soc_component *component = codec_dai->component; + u16 reg; + + /* Turn off PLL */ + reg = snd_soc_component_read(component, WM8940_POWER1); + snd_soc_component_write(component, WM8940_POWER1, reg & 0x1df); + + if (freq_in == 0 || freq_out == 0) { + /* Clock CODEC directly from MCLK */ + reg = snd_soc_component_read(component, WM8940_CLOCK); + snd_soc_component_write(component, WM8940_CLOCK, reg & 0x0ff); + /* Pll power down */ + snd_soc_component_write(component, 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) + snd_soc_component_write(component, WM8940_PLLN, + (pll_div.pre_scale << 4) | pll_div.n | (1 << 6)); + else /* No factional component */ + snd_soc_component_write(component, WM8940_PLLN, + (pll_div.pre_scale << 4) | pll_div.n); + snd_soc_component_write(component, WM8940_PLLK1, pll_div.k >> 18); + snd_soc_component_write(component, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff); + snd_soc_component_write(component, WM8940_PLLK3, pll_div.k & 0x1ff); + /* Enable the PLL */ + reg = snd_soc_component_read(component, WM8940_POWER1); + snd_soc_component_write(component, WM8940_POWER1, reg | 0x020); + + /* Run CODEC from PLL instead of MCLK */ + reg = snd_soc_component_read(component, WM8940_CLOCK); + snd_soc_component_write(component, WM8940_CLOCK, reg | 0x100); + + return 0; +} + +static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai, + int div_id, int div) +{ + struct snd_soc_component *component = codec_dai->component; + u16 reg; + int ret = 0; + + switch (div_id) { + case WM8940_BCLKDIV: + reg = snd_soc_component_read(component, WM8940_CLOCK) & 0xFFE3; + ret = snd_soc_component_write(component, WM8940_CLOCK, reg | (div << 2)); + break; + case WM8940_MCLKDIV: + reg = snd_soc_component_read(component, WM8940_CLOCK) & 0xFF1F; + ret = snd_soc_component_write(component, WM8940_CLOCK, reg | (div << 5)); + break; + case WM8940_OPCLKDIV: + reg = snd_soc_component_read(component, WM8940_GPIO) & 0xFFCF; + ret = snd_soc_component_write(component, WM8940_GPIO, reg | (div << 4)); + break; + } + return ret; +} + +static unsigned int wm8940_get_mclkdiv(unsigned int f_in, unsigned int f_out, + int *mclkdiv) +{ + unsigned int ratio = 2 * f_in / f_out; + + if (ratio <= 2) { + *mclkdiv = WM8940_MCLKDIV_1; + ratio = 2; + } else if (ratio == 3) { + *mclkdiv = WM8940_MCLKDIV_1_5; + } else if (ratio == 4) { + *mclkdiv = WM8940_MCLKDIV_2; + } else if (ratio <= 6) { + *mclkdiv = WM8940_MCLKDIV_3; + ratio = 6; + } else if (ratio <= 8) { + *mclkdiv = WM8940_MCLKDIV_4; + ratio = 8; + } else if (ratio <= 12) { + *mclkdiv = WM8940_MCLKDIV_6; + ratio = 12; + } else if (ratio <= 16) { + *mclkdiv = WM8940_MCLKDIV_8; + ratio = 16; + } else { + *mclkdiv = WM8940_MCLKDIV_12; + ratio = 24; + } + + return f_out * ratio / 2; +} + +static int wm8940_update_clocks(struct snd_soc_dai *dai) +{ + struct snd_soc_component *codec = dai->component; + struct wm8940_priv *priv = snd_soc_component_get_drvdata(codec); + unsigned int fs256; + unsigned int fpll = 0; + unsigned int f; + int mclkdiv; + + if (!priv->mclk || !priv->fs) + return 0; + + fs256 = 256 * priv->fs; + + f = wm8940_get_mclkdiv(priv->mclk, fs256, &mclkdiv); + if (f != priv->mclk) { + /* The PLL performs best around 90MHz */ + fpll = wm8940_get_mclkdiv(22500000, fs256, &mclkdiv); + } + + wm8940_set_dai_pll(dai, 0, 0, priv->mclk, fpll); + wm8940_set_dai_clkdiv(dai, WM8940_MCLKDIV, mclkdiv); + + return 0; +} + +static int wm8940_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + struct snd_soc_component *codec = dai->component; + struct wm8940_priv *priv = snd_soc_component_get_drvdata(codec); + + if (dir != SND_SOC_CLOCK_IN) + return -EINVAL; + + priv->mclk = freq; + + return wm8940_update_clocks(dai); +} + +#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 const struct snd_soc_dai_ops wm8940_dai_ops = { + .hw_params = wm8940_i2s_hw_params, + .set_sysclk = wm8940_set_dai_sysclk, + .mute_stream = wm8940_mute, + .set_fmt = wm8940_set_dai_fmt, + .set_clkdiv = wm8940_set_dai_clkdiv, + .set_pll = wm8940_set_dai_pll, + .no_capture_mute = 1, +}; + +static struct snd_soc_dai_driver wm8940_dai = { + .name = "wm8940-hifi", + .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_rate = 1, +}; + +static int wm8940_probe(struct snd_soc_component *component) +{ + struct wm8940_setup_data *pdata = component->dev->platform_data; + int ret; + u16 reg; + + /* + * Check chip ID for wm8940 - value of 0x00 offset + * SOFTWARE_RESET on write + * CHIP_ID on read + */ + reg = snd_soc_component_read(component, WM8940_SOFTRESET); + if (reg != WM8940_CHIP_ID) { + dev_err(component->dev, "Wrong wm8940 chip ID: 0x%x\n", reg); + return -ENODEV; + } + + ret = wm8940_reset(component); + if (ret < 0) { + dev_err(component->dev, "Failed to issue reset\n"); + return ret; + } + + snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY); + + ret = snd_soc_component_write(component, WM8940_POWER1, 0x180); + if (ret < 0) + return ret; + + if (pdata) { + reg = snd_soc_component_read(component, WM8940_OUTPUTCTL); + ret = snd_soc_component_write(component, WM8940_OUTPUTCTL, reg | pdata->vroi); + if (ret < 0) + return ret; + } + + return ret; +} + +static const struct snd_soc_component_driver soc_component_dev_wm8940 = { + .probe = wm8940_probe, + .set_bias_level = wm8940_set_bias_level, + .controls = wm8940_snd_controls, + .num_controls = ARRAY_SIZE(wm8940_snd_controls), + .dapm_widgets = wm8940_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(wm8940_dapm_widgets), + .dapm_routes = wm8940_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(wm8940_dapm_routes), + .suspend_bias_off = 1, + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, +}; + +static const struct regmap_config wm8940_regmap = { + .reg_bits = 8, + .val_bits = 16, + + .max_register = WM8940_MONOMIX, + .reg_defaults = wm8940_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(wm8940_reg_defaults), + .cache_type = REGCACHE_MAPLE, + + .readable_reg = wm8940_readable_register, + .volatile_reg = wm8940_volatile_register, +}; + +static int wm8940_i2c_probe(struct i2c_client *i2c) +{ + struct wm8940_priv *wm8940; + int ret; + + wm8940 = devm_kzalloc(&i2c->dev, sizeof(struct wm8940_priv), + GFP_KERNEL); + if (wm8940 == NULL) + return -ENOMEM; + + wm8940->regmap = devm_regmap_init_i2c(i2c, &wm8940_regmap); + if (IS_ERR(wm8940->regmap)) + return PTR_ERR(wm8940->regmap); + + i2c_set_clientdata(i2c, wm8940); + + ret = devm_snd_soc_register_component(&i2c->dev, + &soc_component_dev_wm8940, &wm8940_dai, 1); + + return ret; +} + +static const struct i2c_device_id wm8940_i2c_id[] = { + { "wm8940", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id); + +static const struct of_device_id wm8940_of_match[] = { + { .compatible = "wlf,wm8940", }, + { } +}; +MODULE_DEVICE_TABLE(of, wm8940_of_match); + +static struct i2c_driver wm8940_i2c_driver = { + .driver = { + .name = "wm8940", + .of_match_table = wm8940_of_match, + }, + .probe = wm8940_i2c_probe, + .id_table = wm8940_i2c_id, +}; + +module_i2c_driver(wm8940_i2c_driver); + +MODULE_DESCRIPTION("ASoC WM8940 driver"); +MODULE_AUTHOR("Jonathan Cameron"); +MODULE_LICENSE("GPL"); |