--- /dev/null
+/*
+ * 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/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 sysclk;
+ 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_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 = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
+ u16 clk = snd_soc_read(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;
+ }
+ snd_soc_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;
+ }
+
+ snd_soc_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_codec *codec = dai->codec;
+ u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
+ u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
+ u16 companding = snd_soc_read(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 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_write(codec, 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_write(codec, WM8940_COMPANDINGCTL, companding);
+ if (ret)
+ goto error_ret;
+ ret = snd_soc_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 = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
+
+ if (mute)
+ mute_reg |= 0x40;
+
+ return snd_soc_write(codec, WM8940_DAC, mute_reg);
+}
+
+static int wm8940_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
+ u16 val;
+ u16 pwr_reg = snd_soc_read(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 = snd_soc_read(codec, WM8940_OUTPUTCTL);
+ ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
+ if (ret)
+ break;
+ /* set vmid to 75k */
+ ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ /* ensure bufioen and biasen */
+ pwr_reg |= (1 << 2) | (1 << 3);
+ ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+ ret = regcache_sync(wm8940->regmap);
+ if (ret < 0) {
+ dev_err(codec->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_write(codec, WM8940_POWER1, pwr_reg | 0x2);
+ break;
+ case SND_SOC_BIAS_OFF:
+ ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
+ break;
+ }
+
+ codec->dapm.bias_level = level;
+
+ 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_codec *codec = codec_dai->codec;
+ u16 reg;
+
+ /* Turn off PLL */
+ reg = snd_soc_read(codec, WM8940_POWER1);
+ snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
+
+ if (freq_in == 0 || freq_out == 0) {
+ /* Clock CODEC directly from MCLK */
+ reg = snd_soc_read(codec, WM8940_CLOCK);
+ snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
+ /* Pll power down */
+ snd_soc_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)
+ snd_soc_write(codec, WM8940_PLLN,
+ (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
+ else /* No factional component */
+ snd_soc_write(codec, WM8940_PLLN,
+ (pll_div.pre_scale << 4) | pll_div.n);
+ snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
+ snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
+ snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
+ /* Enable the PLL */
+ reg = snd_soc_read(codec, WM8940_POWER1);
+ snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
+
+ /* Run CODEC from PLL instead of MCLK */
+ reg = snd_soc_read(codec, WM8940_CLOCK);
+ snd_soc_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 = snd_soc_codec_get_drvdata(codec);
+
+ 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 = snd_soc_read(codec, WM8940_CLOCK) & 0xFFE3;
+ ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
+ break;
+ case WM8940_MCLKDIV:
+ reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
+ ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
+ break;
+ case WM8940_OPCLKDIV:
+ reg = snd_soc_read(codec, WM8940_GPIO) & 0xFFCF;
+ ret = snd_soc_write(codec, WM8940_GPIO, 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 const 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,
+};
+
+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_rates = 1,
+};
+
+static int wm8940_probe(struct snd_soc_codec *codec)
+{
+ struct wm8940_setup_data *pdata = codec->dev->platform_data;
+ int ret;
+ u16 reg;
+
+ ret = wm8940_reset(codec);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to issue reset\n");
+ return ret;
+ }
+
+ wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+ ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
+ if (ret < 0)
+ return ret;
+
+ if (!pdata)
+ dev_warn(codec->dev, "No platform data supplied\n");
+ else {
+ reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
+ ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
+ if (ret < 0)
+ return ret;
+ }
+
+ return ret;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
+ .probe = wm8940_probe,
+ .set_bias_level = wm8940_set_bias_level,
+ .suspend_bias_off = true,
+
+ .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),
+};
+
+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),
+
+ .readable_reg = wm8940_readable_register,
+ .volatile_reg = wm8940_volatile_register,
+};
+
+static int wm8940_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ 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 = snd_soc_register_codec(&i2c->dev,
+ &soc_codec_dev_wm8940, &wm8940_dai, 1);
+
+ return ret;
+}
+
+static int wm8940_i2c_remove(struct i2c_client *client)
+{
+ snd_soc_unregister_codec(&client->dev);
+
+ 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",
+ .owner = THIS_MODULE,
+ },
+ .probe = wm8940_i2c_probe,
+ .remove = wm8940_i2c_remove,
+ .id_table = wm8940_i2c_id,
+};
+
+module_i2c_driver(wm8940_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC WM8940 driver");
+MODULE_AUTHOR("Jonathan Cameron");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff