From: Jonathan Cameron <jic23(a)cam.ac.uk>
Initial support for the WM8940 Mono Codec with speaker driver
---
This is my first foray into the world of alsa and aSoC, so I thought I'd
make an initial posting of this driver before getting bogged down in
testing every last feature works.
The board I have has it wired up to i2c limiting options for interface
testing and I've currently only tested it as a slave to a pxa271 using
i2s. Board is an xbow Imote 2.
I will hopefully be able to test a few other interface combinations.
All comments welcomed! My apologies if parts of this are complete rubbish!
diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c
new file mode 100644
index 0000000..3491b9c
--- /dev/null
+++ b/sound/soc/codecs/wm8940.c
@@ -0,0 +1,921 @@
+/*
+ * wm8940.c -- WM8940 ALSA Soc Audio driver
+ *
+ * Author: Jonathan Cameron <jic23(a)cam.ac.uk>
+ *
+ * Based on wm8510.c
+ * Copyright 2006 Wolfson Microelectronics PLC.
+ * Author: Liam Girdwood <lrg(a)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:
+ * VROI (resistance control for unused outputs.
+ * AUXMode (inverting vs mixer)
+ * No means to obtain current gain if alc enabled.
+ * No use made of gpio
+ * Auto increment writes (can't think why you'd want to disable it!
+ * Fast VMID discharge for power down
+ * Soft Start.
+ * LoutR control
+ * DLR and ALR Swaps not enabled
+ */
+#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;
+ unsigned int mode;
+ unsigned int clk_inversion;
+};
+
+static u16 wm8940_reg_defaults[] = {
+ [WM8940_SOFTRESET] = 0x8940,
+ [WM8940_POWER1] = 0x0000,
+ [WM8940_POWER2] = 0x0000,
+ [WM8940_POWER3] = 0x0000,
+ [WM8940_IFACE] = 0x0010,
+ [WM8940_COMPANDINGCTL] = 0x0000,
+ [WM8940_CLOCK] = 0x0140,
+ [WM8940_ADDCNTRL] = 0x0000,
+ [WM8940_GPIO] = 0x0000,
+ [WM8940_CTLINT] = 0x0002,
+ [WM8940_DAC] = 0x0000,
+ [WM8940_DACVOL] = 0x00FF,
+
+ [WM8940_ADC] = 0x0100,
+ [WM8940_ADCVOL] = 0x00FF,
+ [WM8940_NOTCH1 ... WM8940_NOTCH8] = 0x0000,
+ [WM8940_DACLIM1] = 0x0032,
+ [WM8940_DACLIM2] = 0x0000,
+
+ [WM8940_ALC1] = 0x0038,
+ [WM8940_ALC2] = 0x000B,
+ [WM8940_ALC3] = 0x0032,
+ [WM8940_NOISEGATE] = 0x0000,
+ [WM8940_PLLN] = 0x0041,
+ [WM8940_PLLK1] = 0x000C,
+ [WM8940_PLLK2] = 0x0093,
+ [WM8940_PLLK3] = 0x00E9,
+
+ [WM8940_ALC4] = 0x0030,
+
+ [WM8940_INPUTCTL] = 0x0002,
+ [WM8940_PGAGAIN] = 0x0050,
+
+ [WM8940_ADCBOOST] = 0x0002,
+
+ [WM8940_OUTPUTCTL] = 0x0002,
+ [WM8940_SPKMIX] = 0x0000,
+
+ [WM8940_SPKVOL] = 0x0079,
+
+ [WM8940_MONOMIX] = 0x0000,
+};
+
+struct snd_soc_codec_device soc_codec_dev_wm8940;
+
+#define WM8940_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | \
+ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
+ SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
+
+#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+
+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)
+{
+ u8 data[3] = { reg,
+ (value & 0xff00) >> 8,
+ (value & 0x00ff)
+ };
+
+ wm8940_write_reg_cache(codec, reg, value);
+
+ return (codec->hw_write(codec->control_data, data, 3) == 3) ? 0 : -EIO;
+
+}
+
+static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
+static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
+static const char *wm8940_mic_bias_levels_text[] = {"0.9", "0.65"};
+static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
+
+static const struct soc_enum wm8940_enum[] = {
+ SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding),
+ SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding),
+ SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text),
+ SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_levels_text),
+ SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text),
+};
+
+DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
+DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
+DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
+DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
+DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
+DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
+DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
+DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
+DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -127500, 50, 1);
+
+static const struct snd_kcontrol_new wm8940_snd_controls[] = {
+ SOC_SINGLE("Digital Loopback Switch dac to adc", WM8940_COMPANDINGCTL,
+ 6, 1, 0),
+ SOC_ENUM("DAC Companding", wm8940_enum[1]),
+ SOC_ENUM("ADC Companding", wm8940_enum[0]),
+ SOC_SINGLE("Companding 8 bit", WM8940_COMPANDINGCTL, 5, 1, 0),
+ SOC_SINGLE("Digital Loopback Switch adc to dac", WM8940_COMPANDINGCTL,
+ 0, 1, 0),
+
+ /* Auto level control */
+ SOC_ENUM("ALC Mode", wm8940_enum[2]),
+ SOC_SINGLE("ALC Enable 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_enum[3]),
+ SOC_SINGLE("Capture Boost(+20dB)", WM8940_ADCBOOST, 8, 1, 0),
+
+ SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
+ 0, 63, 0, wm8940_spk_vol_tlv),
+ SOC_SINGLE("Speaker Playback Mute", WM8940_SPKVOL, 6, 1, 0),
+ SOC_SINGLE_TLV("Speaker Playback Attenuation", WM8940_SPKVOL,
+ 8, 1, 1, wm8940_att_tlv),
+ SOC_SINGLE("Speaker Playback ZC", WM8940_SPKVOL, 7, 1, 0),
+
+ SOC_SINGLE("Mono Out Mute", WM8940_MONOMIX, 6, 1, 0),
+ SOC_SINGLE_TLV("Mono Out Attenuation", 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_enum[4]),
+ 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 Enable Switch", WM8940_ADDCNTRL, 0, 1, 0),
+
+ /* Notch filters */
+ SOC_SINGLE("Notch Filter 1 Switch", WM8940_NOTCH1, 14, 1, 0),
+ SOC_SINGLE("Notch Filter 2 Switch", WM8940_NOTCH3, 14, 1, 0),
+ SOC_SINGLE("Notch Filter 3 Switch", WM8940_NOTCH5, 14, 1, 0),
+ SOC_SINGLE("Notch Filter 4 Switch", WM8940_NOTCH7, 14, 1, 0),
+
+ SOC_SINGLE("Notch Filter 1 Update Switch", WM8940_NOTCH1, 15, 1, 0),
+ SOC_SINGLE("Notch Filter 2 Update Switch", WM8940_NOTCH3, 15, 1, 0),
+ SOC_SINGLE("Notch Filter 3 Update Switch", WM8940_NOTCH5, 15, 1, 0),
+ SOC_SINGLE("Notch Filter 4 Update Switch", WM8940_NOTCH7, 15, 1, 0),
+
+ SOC_SINGLE("Notch Filter 1 Coefficient a0", WM8940_NOTCH1, 0, 16383, 1),
+ SOC_SINGLE("Notch Filter 2 Coefficient a0", WM8940_NOTCH3, 0, 16383, 1),
+ SOC_SINGLE("Notch Filter 3 Coefficient a0", WM8940_NOTCH5, 0, 16383, 1),
+ SOC_SINGLE("Notch Filter 4 Coefficient a0", WM8940_NOTCH7, 0, 16383, 1),
+
+ SOC_SINGLE("Notch Filter 1 Coefficient a1", WM8940_NOTCH2, 0, 16383, 1),
+ SOC_SINGLE("Notch Filter 2 Coefficient a1", WM8940_NOTCH4, 0, 16383, 1),
+ SOC_SINGLE("Notch Filter 3 Coefficient a1", WM8940_NOTCH6, 0, 16383, 1),
+ SOC_SINGLE("Notch Filter 4 Coefficient a1", WM8940_NOTCH8, 0, 16383, 1),
+};
+
+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),
+};
+
+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)
+{
+ snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets,
+ ARRAY_SIZE(wm8940_dapm_widgets));
+ snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
+ snd_soc_dapm_new_widgets(codec);
+}
+static int wm8940_add_controls(struct snd_soc_codec *codec)
+{
+ int err, i;
+
+ for (i = 0; i < ARRAY_SIZE(wm8940_snd_controls); i++) {
+ err = snd_ctl_add(codec->card,
+ snd_soc_cnew(&wm8940_snd_controls[i], codec,
+ NULL));
+ if (err < 0)
+ return err;
+ }
+
+ 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->codec;
+ struct wm8940_priv *wm8940 = codec->private_data;
+
+ /* clear fmt and wl */
+ u16 iface = wm8940_read_reg_cache(codec, WM8940_IFACE) & 0xFF07;
+ u16 addcntrl = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFF1;
+
+ 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;
+ }
+ wm8940_write(codec, WM8940_ADDCNTRL, addcntrl);
+
+ switch (params_format(params)) {
+ 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;
+ }
+
+ switch (wm8940->mode) {
+ 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 (wm8940->clk_inversion) {
+ 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_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;
+
+ return wm8940_write(codec,
+ WM8940_DAC,
+ mute ? mute_reg | 0x40 : mute_reg);
+
+}
+
+static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct wm8940_priv *wm8940 = codec->private_data;
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_LEFT_J:
+ case SND_SOC_DAIFMT_RIGHT_J:
+ case SND_SOC_DAIFMT_DSP_A:
+ case SND_SOC_DAIFMT_DSP_B:
+ wm8940->mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+ break;
+ }
+ wm8940->clk_inversion = fmt & SND_SOC_DAIFMT_INV_MASK;
+
+ return 0;
+}
+
+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;
+
+ switch (div_id) {
+ case WM8940_BCLKDIV:
+ reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFFEF3;
+ wm8940_write(codec, WM8940_CLOCK, reg | (div << 2));
+ break;
+ case WM8940_MCLKDIV:
+ reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFF1F;
+ wm8940_write(codec, WM8940_CLOCK, reg | (div << 5));
+ break;
+ case WM8940_OPCLKDIV:
+ reg = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFCF;
+ wm8940_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
+ break;
+ }
+ return 0;
+}
+
+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)
+/* This unfortunately is rather different from the wm8510 */
+static void pll_factors(unsigned int target, unsigned int source)
+{
+ unsigned long long Kpart;
+ unsigned int K, Ndiv, Nmod;
+
+ Ndiv = target / source;
+ /* Ndiv would be greater than 12, so add a pre multiply by 2*/
+ if (Ndiv > 12) {
+ /* FIXME: This will loose accuracy, how to deal? */
+ printk(KERN_WARNING "Incorrectly handled case\n");
+ source <<= 1;
+ pll_div.pre_scale = 0;
+ Ndiv = target / source;
+ } else if (Ndiv < 3) {
+ source >>= 2;
+ pll_div.pre_scale = 3;
+ Ndiv = target / source;
+ } else if (Ndiv < 6) {
+ source >>= 1;
+ pll_div.pre_scale = 2;
+ } else
+ pll_div.pre_scale = 1;
+
+ if ((Ndiv < 6) || (Ndiv > 12))
+ printk(KERN_WARNING
+ "WM8510 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;
+ 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);
+
+ /* Turn off PLL */
+ reg = wm8940_read_reg_cache(codec, WM8940_POWER1);
+ wm8940_write(codec, WM8940_POWER1, reg & 0x1df);
+
+ /* It is also possible to turn it off completely - TODO */
+ return 0;
+ }
+
+ pll_factors(freq_out*8, freq_in);
+
+ 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_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;
+
+ 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);
+ wm8940_write(codec, WM8940_OUTPUTCTL, val | 0x2);
+ /* set vmid to 75k and unmute dac */
+ wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x1);
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ /* ensure bufioen and biasen */
+ pwr_reg |= (1 << 2) | (1 << 3);
+ /* set vmid to 2.5k for fast start */
+ wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x3);
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ /* ensure bufioen and biasen */
+ pwr_reg |= (1 << 2) | (1 << 3);
+ /* set vmid to 300k for standby */
+ wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x2);
+ break;
+ case SND_SOC_BIAS_OFF:
+ wm8940_write(codec, WM8940_POWER1, pwr_reg);
+ break;
+ }
+
+ 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;
+
+ wm8940_write(codec, WM8940_CLOCK, 0);
+ switch (freq) {
+ case 11289600:
+ case 12000000:
+ case 12288000:
+ case 16934400:
+ case 18432000:
+ wm8940->sysclk = freq;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+struct snd_soc_dai wm8940_dai = {
+ .name = "WM8940",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 2, /* lie - pxa-i2s has min of 2*/
+ .rates = WM8940_RATES,
+ .formats = WM8940_FORMATS,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 2, /* lie */
+ .rates = WM8940_RATES,
+ .formats = WM8940_FORMATS,
+ },
+ .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,
+ },
+};
+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->codec;
+
+ wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ return 0;
+}
+
+static int wm8940_resume(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->codec;
+ int i;
+ 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++)
+ wm8940_write(codec, i, cache[i]);
+ wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ wm8940_set_bias_level(codec, codec->suspend_bias_level);
+
+ return 0;
+}
+
+#define wm8940_reset(c) wm8940_write(c, WM8940_SOFTRESET, 0);
+
+static int wm8940_init(struct snd_soc_device *socdev)
+{
+ struct snd_soc_codec *codec = socdev->codec;
+ int ret = 0;
+
+ codec->name = "WM8940";
+ codec->owner = THIS_MODULE;
+ codec->read = wm8940_read_reg_cache;
+ codec->write = wm8940_write;
+ 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 = kmemdup(wm8940_reg_defaults,
+ sizeof wm8940_reg_defaults,
+ GFP_KERNEL);
+
+ if (codec->reg_cache == NULL) {
+ ret = -ENOMEM;
+ goto error_free_cache;
+ }
+ ret = wm8940_reset(codec);
+ if (ret)
+ goto error_free_cache;
+
+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+ if (ret < 0)
+ goto error_free_cache;
+
+ codec->bias_level = SND_SOC_BIAS_OFF;
+ wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ wm8940_add_controls(codec);
+ wm8940_add_widgets(codec);
+
+ /* Enables the level shifters and non-vmid derived bias
+ * current generator
+ */
+ ret = wm8940_write(codec, WM8940_POWER1, 0x180);
+ if (ret < 0)
+ goto card_err;
+
+ ret = snd_soc_init_card(socdev);
+ if (ret < 0) {
+ printk(KERN_ERR "wm8940: failed to register card\n");
+ goto card_err;
+ }
+
+ return ret;
+
+card_err:
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+error_free_cache:
+ kfree(codec->reg_cache);
+ return ret;
+}
+
+static struct snd_soc_device *wm8940_socdev;
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static int wm8940_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct snd_soc_device *socdev = wm8940_socdev;
+ struct snd_soc_codec *codec = socdev->codec;
+ int ret;
+
+ i2c_set_clientdata(i2c, codec);
+ codec->control_data = i2c;
+ ret = wm8940_init(socdev);
+ if (ret < 0)
+ pr_err("Failed to initialise WM8940\n");
+
+ return ret;
+}
+static int wm8940_i2c_remove(struct i2c_client *client)
+{
+ 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 = wm8940_i2c_remove,
+ .id_table = wm8940_i2c_id,
+};
+
+static int wm8940_add_i2c_device(struct platform_device *pdev,
+ const struct wm8940_setup_data *setup)
+{
+ struct i2c_board_info info = {
+ .type = "wm8940",
+ .addr = setup->i2c_address,
+ };
+ struct i2c_adapter *adapter;
+ struct i2c_client *client;
+ int ret;
+
+ ret = i2c_add_driver(&wm8940_i2c_driver);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "can't add i2c driver\n");
+ return ret;
+ }
+
+ adapter = i2c_get_adapter(setup->i2c_bus);
+ if (!adapter) {
+ dev_err(&pdev->dev, "can't get i2c adapter %d\n",
+ setup->i2c_bus);
+ goto err_driver;
+ }
+
+ client = i2c_new_device(adapter, &info);
+ i2c_put_adapter(adapter);
+ if (!client) {
+ dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
+ (unsigned int)info.addr);
+ goto err_driver;
+ }
+
+ return 0;
+
+err_driver:
+ i2c_del_driver(&wm8940_i2c_driver);
+ return -ENODEV;
+}
+
+#endif
+
+static int wm8940_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct wm8940_setup_data *setup;
+ struct snd_soc_codec *codec;
+ struct wm8940_priv *wm8940;
+ int ret = 0;
+
+ setup = socdev->codec_data;
+ codec = kzalloc(sizeof *codec, GFP_KERNEL);
+ if (codec == NULL)
+ return -ENOMEM;
+
+ wm8940 = kzalloc(sizeof(*wm8940), GFP_KERNEL);
+ if (wm8940 == NULL)
+ return -ENOMEM;
+ codec->private_data = wm8940;
+ socdev->codec = codec;
+ mutex_init(&codec->mutex);
+ INIT_LIST_HEAD(&codec->dapm_widgets);
+ INIT_LIST_HEAD(&codec->dapm_paths);
+ wm8940_socdev = socdev;
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+ if (setup->i2c_address) {
+ codec->hw_write = (hw_write_t)i2c_master_send;
+ ret = wm8940_add_i2c_device(pdev, setup);
+ }
+#endif
+ if (ret != 0)
+ kfree(codec);
+ return ret;
+}
+
+static int wm8940_remove(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->codec;
+
+ if (codec->control_data)
+ wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+ i2c_unregister_device(codec->control_data);
+ i2c_del_driver(&wm8940_i2c_driver);
+#endif
+ kfree(codec);
+
+ 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 __init wm8940_modinit(void)
+{
+ return snd_soc_register_dai(&wm8940_dai);
+}
+module_init(wm8940_modinit);
+
+static void __exit wm8940_exit(void)
+{
+ snd_soc_unregister_dai(&wm8940_dai);
+}
+module_exit(wm8940_exit);
+
+MODULE_DESCRIPTION("ASoC WM8940 driver");
+MODULE_AUTHOR("Jonathan Cameron");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/wm8940.h b/sound/soc/codecs/wm8940.h
new file mode 100644
index 0000000..ab1221c
--- /dev/null
+++ b/sound/soc/codecs/wm8940.h
@@ -0,0 +1,102 @@
+/*
+ * wm8940.h -- WM8940 Soc Audio driver
+ *
+ * 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.
+ */
+
+#ifndef _WM8940_H
+#define _WM8940_H
+
+struct wm8940_setup_data {
+ /* The one I have isn't spi wired, so can't test */
+ int i2c_bus;
+ unsigned short i2c_address;
+};
+extern struct snd_soc_dai wm8940_dai;
+extern struct snd_soc_codec_device soc_codec_dev_wm8940;
+
+/* WM8940 register space */
+#define WM8940_SOFTRESET 0x00
+#define WM8940_POWER1 0x01
+#define WM8940_POWER2 0x02
+#define WM8940_POWER3 0x03
+#define WM8940_IFACE 0x04
+#define WM8940_COMPANDINGCTL 0x05
+#define WM8940_CLOCK 0x06
+#define WM8940_ADDCNTRL 0x07
+#define WM8940_GPIO 0x08
+#define WM8940_CTLINT 0x09
+#define WM8940_DAC 0x0A
+#define WM8940_DACVOL 0x0B
+
+#define WM8940_ADC 0x0E
+#define WM8940_ADCVOL 0x0F
+#define WM8940_NOTCH1 0x10
+#define WM8940_NOTCH2 0x11
+#define WM8940_NOTCH3 0x12
+#define WM8940_NOTCH4 0x13
+#define WM8940_NOTCH5 0x14
+#define WM8940_NOTCH6 0x15
+#define WM8940_NOTCH7 0x16
+#define WM8940_NOTCH8 0x17
+#define WM8940_DACLIM1 0x18
+#define WM8940_DACLIM2 0x19
+
+#define WM8940_ALC1 0x20
+#define WM8940_ALC2 0x21
+#define WM8940_ALC3 0x22
+#define WM8940_NOISEGATE 0x23
+#define WM8940_PLLN 0x24
+#define WM8940_PLLK1 0x25
+#define WM8940_PLLK2 0x26
+#define WM8940_PLLK3 0x27
+
+#define WM8940_ALC4 0x2A
+
+#define WM8940_INPUTCTL 0x2C
+#define WM8940_PGAGAIN 0x2D
+
+#define WM8940_ADCBOOST 0x2F
+
+#define WM8940_OUTPUTCTL 0x31
+#define WM8940_SPKMIX 0x32
+
+#define WM8940_SPKVOL 0x36
+
+#define WM8940_MONOMIX 0x38
+
+
+
+/* Clock divider Id's */
+#define WM8940_BCLKDIV 0
+#define WM8940_MCLKDIV 1
+#define WM8940_OPCLKDIV 2
+
+/* MCLK clock dividers */
+#define WM8940_MCLKDIV_1 0
+#define WM8940_MCLKDIV_1_5 1
+#define WM8940_MCLKDIV_2 2
+#define WM8940_MCLKDIV_3 3
+#define WM8940_MCLKDIV_4 4
+#define WM8940_MCLKDIV_6 5
+#define WM8940_MCLKDIV_8 6
+#define WM8940_MCLKDIV_12 7
+
+/* BCLK clock dividers */
+#define WM8940_BCLKDIV_1 0
+#define WM8940_BCLKDIV_2 1
+#define WM8940_BCLKDIV_4 2
+#define WM8940_BCLKDIV_8 3
+#define WM8940_BCLKDIV_16 4
+#define WM8940_BCLKDIV_32 5
+
+/* PLL Out Dividers */
+#define WM8940_OPCLKDIV_1 0
+#define WM8940_OPCLKDIV_2 1
+#define WM8940_OPCLKDIV_3 2
+#define WM8940_OPCLKDIV_4 3
+
+#endif /* _WM8940_H */
+
