ASoC: WM8770: Initial driver
The WM8770 is a high performance, multi-channel audio
codec. The WM8770 is ideal for surround sound processing
applications for home hi-fi, automotive and other audio
visual equipment.
Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm8770.c b/sound/soc/codecs/wm8770.c
new file mode 100644
index 0000000..8608b4a
--- /dev/null
+++ b/sound/soc/codecs/wm8770.c
@@ -0,0 +1,750 @@
+/*
+ * wm8770.c -- WM8770 ALSA SoC Audio driver
+ *
+ * Copyright 2010 Wolfson Microelectronics plc
+ *
+ * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.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 "wm8770.h"
+
+#define WM8770_NUM_SUPPLIES 3
+static const char *wm8770_supply_names[WM8770_NUM_SUPPLIES] = {
+ "AVDD1",
+ "AVDD2",
+ "DVDD"
+};
+
+static const u16 wm8770_reg_defs[WM8770_CACHEREGNUM] = {
+ 0x7f, 0x7f, 0x7f, 0x7f,
+ 0x7f, 0x7f, 0x7f, 0x7f,
+ 0x7f, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0, 0x90, 0,
+ 0, 0x22, 0x22, 0x3e,
+ 0xc, 0xc, 0x100, 0x189,
+ 0x189, 0x8770
+};
+
+struct wm8770_priv {
+ enum snd_soc_control_type control_type;
+ struct regulator_bulk_data supplies[WM8770_NUM_SUPPLIES];
+ struct notifier_block disable_nb[WM8770_NUM_SUPPLIES];
+ struct snd_soc_codec *codec;
+ int sysclk;
+};
+
+static int vout12supply_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event);
+static int vout34supply_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event);
+
+/*
+ * We can't use the same notifier block for more than one supply and
+ * there's no way I can see to get from a callback to the caller
+ * except container_of().
+ */
+#define WM8770_REGULATOR_EVENT(n) \
+static int wm8770_regulator_event_##n(struct notifier_block *nb, \
+ unsigned long event, void *data) \
+{ \
+ struct wm8770_priv *wm8770 = container_of(nb, struct wm8770_priv, \
+ disable_nb[n]); \
+ if (event & REGULATOR_EVENT_DISABLE) { \
+ wm8770->codec->cache_sync = 1; \
+ } \
+ return 0; \
+}
+
+WM8770_REGULATOR_EVENT(0)
+WM8770_REGULATOR_EVENT(1)
+WM8770_REGULATOR_EVENT(2)
+
+static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
+static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
+static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);
+
+static const char *dac_phase_text[][2] = {
+ { "DAC1 Normal", "DAC1 Inverted" },
+ { "DAC2 Normal", "DAC2 Inverted" },
+ { "DAC3 Normal", "DAC3 Inverted" },
+ { "DAC4 Normal", "DAC4 Inverted" },
+};
+
+static const struct soc_enum dac_phase[] = {
+ SOC_ENUM_DOUBLE(WM8770_DACPHASE, 0, 1, 2, dac_phase_text[0]),
+ SOC_ENUM_DOUBLE(WM8770_DACPHASE, 2, 3, 2, dac_phase_text[1]),
+ SOC_ENUM_DOUBLE(WM8770_DACPHASE, 4, 5, 2, dac_phase_text[2]),
+ SOC_ENUM_DOUBLE(WM8770_DACPHASE, 6, 7, 2, dac_phase_text[3]),
+};
+
+static const struct snd_kcontrol_new wm8770_snd_controls[] = {
+ /* global DAC playback controls */
+ SOC_SINGLE_TLV("DAC Playback Volume", WM8770_MSDIGVOL, 0, 255, 0,
+ dac_dig_tlv),
+ SOC_SINGLE("DAC Playback Switch", WM8770_DACMUTE, 4, 1, 1),
+ SOC_SINGLE("DAC Playback ZC Switch", WM8770_DACCTRL1, 0, 1, 0),
+
+ /* global VOUT playback controls */
+ SOC_SINGLE_TLV("VOUT Playback Volume", WM8770_MSALGVOL, 0, 127, 0,
+ dac_alg_tlv),
+ SOC_SINGLE("VOUT Playback ZC Switch", WM8770_MSALGVOL, 7, 1, 0),
+
+ /* VOUT1/2/3/4 specific controls */
+ SOC_DOUBLE_R_TLV("VOUT1 Playback Volume", WM8770_VOUT1LVOL,
+ WM8770_VOUT1RVOL, 0, 127, 0, dac_alg_tlv),
+ SOC_DOUBLE_R("VOUT1 Playback ZC Switch", WM8770_VOUT1LVOL,
+ WM8770_VOUT1RVOL, 7, 1, 0),
+ SOC_DOUBLE_R_TLV("VOUT2 Playback Volume", WM8770_VOUT2LVOL,
+ WM8770_VOUT2RVOL, 0, 127, 0, dac_alg_tlv),
+ SOC_DOUBLE_R("VOUT2 Playback ZC Switch", WM8770_VOUT2LVOL,
+ WM8770_VOUT2RVOL, 7, 1, 0),
+ SOC_DOUBLE_R_TLV("VOUT3 Playback Volume", WM8770_VOUT3LVOL,
+ WM8770_VOUT3RVOL, 0, 127, 0, dac_alg_tlv),
+ SOC_DOUBLE_R("VOUT3 Playback ZC Switch", WM8770_VOUT3LVOL,
+ WM8770_VOUT3RVOL, 7, 1, 0),
+ SOC_DOUBLE_R_TLV("VOUT4 Playback Volume", WM8770_VOUT4LVOL,
+ WM8770_VOUT4RVOL, 0, 127, 0, dac_alg_tlv),
+ SOC_DOUBLE_R("VOUT4 Playback ZC Switch", WM8770_VOUT4LVOL,
+ WM8770_VOUT4RVOL, 7, 1, 0),
+
+ /* DAC1/2/3/4 specific controls */
+ SOC_DOUBLE_R_TLV("DAC1 Playback Volume", WM8770_DAC1LVOL,
+ WM8770_DAC1RVOL, 0, 255, 0, dac_dig_tlv),
+ SOC_SINGLE("DAC1 Deemphasis Switch", WM8770_DACCTRL2, 0, 1, 0),
+ SOC_ENUM("DAC1 Phase", dac_phase[0]),
+ SOC_DOUBLE_R_TLV("DAC2 Playback Volume", WM8770_DAC2LVOL,
+ WM8770_DAC2RVOL, 0, 255, 0, dac_dig_tlv),
+ SOC_SINGLE("DAC2 Deemphasis Switch", WM8770_DACCTRL2, 1, 1, 0),
+ SOC_ENUM("DAC2 Phase", dac_phase[1]),
+ SOC_DOUBLE_R_TLV("DAC3 Playback Volume", WM8770_DAC3LVOL,
+ WM8770_DAC3RVOL, 0, 255, 0, dac_dig_tlv),
+ SOC_SINGLE("DAC3 Deemphasis Switch", WM8770_DACCTRL2, 2, 1, 0),
+ SOC_ENUM("DAC3 Phase", dac_phase[2]),
+ SOC_DOUBLE_R_TLV("DAC4 Playback Volume", WM8770_DAC4LVOL,
+ WM8770_DAC4RVOL, 0, 255, 0, dac_dig_tlv),
+ SOC_SINGLE("DAC4 Deemphasis Switch", WM8770_DACCTRL2, 3, 1, 0),
+ SOC_ENUM("DAC4 Phase", dac_phase[3]),
+
+ /* ADC specific controls */
+ SOC_DOUBLE_R_TLV("Capture Volume", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
+ 0, 31, 0, adc_tlv),
+ SOC_DOUBLE_R("Capture Switch", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
+ 5, 1, 1),
+
+ /* other controls */
+ SOC_SINGLE("ADC 128x Oversampling Switch", WM8770_MSTRCTRL, 3, 1, 0),
+ SOC_SINGLE("ADC Highpass Filter Switch", WM8770_IFACECTRL, 8, 1, 1)
+};
+
+static const char *ain_text[] = {
+ "AIN1", "AIN2", "AIN3", "AIN4",
+ "AIN5", "AIN6", "AIN7", "AIN8"
+};
+
+static const struct soc_enum ain_enum =
+ SOC_ENUM_DOUBLE(WM8770_ADCMUX, 0, 4, 8, ain_text);
+
+static const struct snd_kcontrol_new ain_mux =
+ SOC_DAPM_ENUM("Capture Mux", ain_enum);
+
+static const struct snd_kcontrol_new vout1_mix_controls[] = {
+ SOC_DAPM_SINGLE("DAC1 Switch", WM8770_OUTMUX1, 0, 1, 0),
+ SOC_DAPM_SINGLE("AUX1 Switch", WM8770_OUTMUX1, 1, 1, 0),
+ SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 2, 1, 0)
+};
+
+static const struct snd_kcontrol_new vout2_mix_controls[] = {
+ SOC_DAPM_SINGLE("DAC2 Switch", WM8770_OUTMUX1, 3, 1, 0),
+ SOC_DAPM_SINGLE("AUX2 Switch", WM8770_OUTMUX1, 4, 1, 0),
+ SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 5, 1, 0)
+};
+
+static const struct snd_kcontrol_new vout3_mix_controls[] = {
+ SOC_DAPM_SINGLE("DAC3 Switch", WM8770_OUTMUX2, 0, 1, 0),
+ SOC_DAPM_SINGLE("AUX3 Switch", WM8770_OUTMUX2, 1, 1, 0),
+ SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 2, 1, 0)
+};
+
+static const struct snd_kcontrol_new vout4_mix_controls[] = {
+ SOC_DAPM_SINGLE("DAC4 Switch", WM8770_OUTMUX2, 3, 1, 0),
+ SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 4, 1, 0)
+};
+
+static const struct snd_soc_dapm_widget wm8770_dapm_widgets[] = {
+ SND_SOC_DAPM_INPUT("AUX1"),
+ SND_SOC_DAPM_INPUT("AUX2"),
+ SND_SOC_DAPM_INPUT("AUX3"),
+
+ SND_SOC_DAPM_INPUT("AIN1"),
+ SND_SOC_DAPM_INPUT("AIN2"),
+ SND_SOC_DAPM_INPUT("AIN3"),
+ SND_SOC_DAPM_INPUT("AIN4"),
+ SND_SOC_DAPM_INPUT("AIN5"),
+ SND_SOC_DAPM_INPUT("AIN6"),
+ SND_SOC_DAPM_INPUT("AIN7"),
+ SND_SOC_DAPM_INPUT("AIN8"),
+
+ SND_SOC_DAPM_MUX("Capture Mux", WM8770_ADCMUX, 8, 1, &ain_mux),
+
+ SND_SOC_DAPM_ADC("ADC", "Capture", WM8770_PWDNCTRL, 1, 1),
+
+ SND_SOC_DAPM_DAC("DAC1", "Playback", WM8770_PWDNCTRL, 2, 1),
+ SND_SOC_DAPM_DAC("DAC2", "Playback", WM8770_PWDNCTRL, 3, 1),
+ SND_SOC_DAPM_DAC("DAC3", "Playback", WM8770_PWDNCTRL, 4, 1),
+ SND_SOC_DAPM_DAC("DAC4", "Playback", WM8770_PWDNCTRL, 5, 1),
+
+ SND_SOC_DAPM_SUPPLY("VOUT12 Supply", SND_SOC_NOPM, 0, 0,
+ vout12supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_SUPPLY("VOUT34 Supply", SND_SOC_NOPM, 0, 0,
+ vout34supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+
+ SND_SOC_DAPM_MIXER("VOUT1 Mixer", SND_SOC_NOPM, 0, 0,
+ vout1_mix_controls, ARRAY_SIZE(vout1_mix_controls)),
+ SND_SOC_DAPM_MIXER("VOUT2 Mixer", SND_SOC_NOPM, 0, 0,
+ vout2_mix_controls, ARRAY_SIZE(vout2_mix_controls)),
+ SND_SOC_DAPM_MIXER("VOUT3 Mixer", SND_SOC_NOPM, 0, 0,
+ vout3_mix_controls, ARRAY_SIZE(vout3_mix_controls)),
+ SND_SOC_DAPM_MIXER("VOUT4 Mixer", SND_SOC_NOPM, 0, 0,
+ vout4_mix_controls, ARRAY_SIZE(vout4_mix_controls)),
+
+ SND_SOC_DAPM_OUTPUT("VOUT1"),
+ SND_SOC_DAPM_OUTPUT("VOUT2"),
+ SND_SOC_DAPM_OUTPUT("VOUT3"),
+ SND_SOC_DAPM_OUTPUT("VOUT4")
+};
+
+static const struct snd_soc_dapm_route wm8770_intercon[] = {
+ { "Capture Mux", "AIN1", "AIN1" },
+ { "Capture Mux", "AIN2", "AIN2" },
+ { "Capture Mux", "AIN3", "AIN3" },
+ { "Capture Mux", "AIN4", "AIN4" },
+ { "Capture Mux", "AIN5", "AIN5" },
+ { "Capture Mux", "AIN6", "AIN6" },
+ { "Capture Mux", "AIN7", "AIN7" },
+ { "Capture Mux", "AIN8", "AIN8" },
+
+ { "ADC", NULL, "Capture Mux" },
+
+ { "VOUT1 Mixer", NULL, "VOUT12 Supply" },
+ { "VOUT1 Mixer", "DAC1 Switch", "DAC1" },
+ { "VOUT1 Mixer", "AUX1 Switch", "AUX1" },
+ { "VOUT1 Mixer", "Bypass Switch", "Capture Mux" },
+
+ { "VOUT2 Mixer", NULL, "VOUT12 Supply" },
+ { "VOUT2 Mixer", "DAC2 Switch", "DAC2" },
+ { "VOUT2 Mixer", "AUX2 Switch", "AUX2" },
+ { "VOUT2 Mixer", "Bypass Switch", "Capture Mux" },
+
+ { "VOUT3 Mixer", NULL, "VOUT34 Supply" },
+ { "VOUT3 Mixer", "DAC3 Switch", "DAC3" },
+ { "VOUT3 Mixer", "AUX3 Switch", "AUX3" },
+ { "VOUT3 Mixer", "Bypass Switch", "Capture Mux" },
+
+ { "VOUT4 Mixer", NULL, "VOUT34 Supply" },
+ { "VOUT4 Mixer", "DAC4 Switch", "DAC4" },
+ { "VOUT4 Mixer", "Bypass Switch", "Capture Mux" },
+
+ { "VOUT1", NULL, "VOUT1 Mixer" },
+ { "VOUT2", NULL, "VOUT2 Mixer" },
+ { "VOUT3", NULL, "VOUT3 Mixer" },
+ { "VOUT4", NULL, "VOUT4 Mixer" }
+};
+
+static int vout12supply_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_codec *codec;
+
+ codec = w->codec;
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0);
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0x180);
+ break;
+ }
+
+ return 0;
+}
+
+static int vout34supply_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_codec *codec;
+
+ codec = w->codec;
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0);
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0x180);
+ break;
+ }
+
+ return 0;
+}
+
+static int wm8770_reset(struct snd_soc_codec *codec)
+{
+ return snd_soc_write(codec, WM8770_RESET, 0);
+}
+
+static int wm8770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_codec *codec;
+ int iface, master;
+
+ codec = dai->codec;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ master = 0x100;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ master = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ iface = 0;
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ iface |= 0x2;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ iface |= 0x1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ iface |= 0xc;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ iface |= 0x8;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ iface |= 0x4;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ snd_soc_update_bits(codec, WM8770_IFACECTRL, 0xf, iface);
+ snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x100, master);
+
+ return 0;
+}
+
+static const int mclk_ratios[] = {
+ 128,
+ 192,
+ 256,
+ 384,
+ 512,
+ 768
+};
+
+static int wm8770_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec;
+ struct wm8770_priv *wm8770;
+ int i;
+ int iface;
+ int shift;
+ int ratio;
+
+ codec = dai->codec;
+ wm8770 = snd_soc_codec_get_drvdata(codec);
+
+ iface = 0;
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ iface |= 0x10;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ iface |= 0x20;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ iface |= 0x30;
+ break;
+ }
+
+ switch (substream->stream) {
+ case SNDRV_PCM_STREAM_PLAYBACK:
+ i = 0;
+ shift = 4;
+ break;
+ case SNDRV_PCM_STREAM_CAPTURE:
+ i = 2;
+ shift = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Only need to set MCLK/LRCLK ratio if we're master */
+ if (snd_soc_read(codec, WM8770_MSTRCTRL) & 0x100) {
+ for (; i < ARRAY_SIZE(mclk_ratios); ++i) {
+ ratio = wm8770->sysclk / params_rate(params);
+ if (ratio == mclk_ratios[i])
+ break;
+ }
+
+ if (i == ARRAY_SIZE(mclk_ratios)) {
+ dev_err(codec->dev,
+ "Unable to configure MCLK ratio %d/%d\n",
+ wm8770->sysclk, params_rate(params));
+ return -EINVAL;
+ }
+
+ dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
+
+ snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x7 << shift,
+ i << shift);
+ }
+
+ snd_soc_update_bits(codec, WM8770_IFACECTRL, 0x30, iface);
+
+ return 0;
+}
+
+static int wm8770_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_codec *codec;
+
+ codec = dai->codec;
+ return snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10,
+ !!mute << 4);
+}
+
+static int wm8770_set_sysclk(struct snd_soc_dai *dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec;
+ struct wm8770_priv *wm8770;
+
+ codec = dai->codec;
+ wm8770 = snd_soc_codec_get_drvdata(codec);
+ wm8770->sysclk = freq;
+ return 0;
+}
+
+static void wm8770_sync_cache(struct snd_soc_codec *codec)
+{
+ int i;
+ u16 *cache;
+
+ if (!codec->cache_sync)
+ return;
+
+ codec->cache_only = 0;
+ cache = codec->reg_cache;
+ for (i = 0; i < codec->driver->reg_cache_size; i++) {
+ if (i == WM8770_RESET || cache[i] == wm8770_reg_defs[i])
+ continue;
+ snd_soc_write(codec, i, cache[i]);
+ }
+ codec->cache_sync = 0;
+}
+
+static int wm8770_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ int ret;
+ struct wm8770_priv *wm8770;
+
+ wm8770 = snd_soc_codec_get_drvdata(codec);
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+ ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
+ wm8770->supplies);
+ if (ret) {
+ dev_err(codec->dev,
+ "Failed to enable supplies: %d\n",
+ ret);
+ return ret;
+ }
+ wm8770_sync_cache(codec);
+ /* global powerup */
+ snd_soc_write(codec, WM8770_PWDNCTRL, 0);
+ }
+ break;
+ case SND_SOC_BIAS_OFF:
+ /* global powerdown */
+ snd_soc_write(codec, WM8770_PWDNCTRL, 1);
+ regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies),
+ wm8770->supplies);
+ break;
+ }
+
+ codec->dapm.bias_level = level;
+ return 0;
+}
+
+#define WM8770_FORMATS (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 wm8770_dai_ops = {
+ .digital_mute = wm8770_mute,
+ .hw_params = wm8770_hw_params,
+ .set_fmt = wm8770_set_fmt,
+ .set_sysclk = wm8770_set_sysclk,
+};
+
+static struct snd_soc_dai_driver wm8770_dai = {
+ .name = "wm8770-hifi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = WM8770_FORMATS
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .formats = WM8770_FORMATS
+ },
+ .ops = &wm8770_dai_ops,
+ .symmetric_rates = 1
+};
+
+#ifdef CONFIG_PM
+static int wm8770_suspend(struct snd_soc_codec *codec, pm_message_t state)
+{
+ wm8770_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ return 0;
+}
+
+static int wm8770_resume(struct snd_soc_codec *codec)
+{
+ wm8770_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ return 0;
+}
+#else
+#define wm8770_suspend NULL
+#define wm8770_resume NULL
+#endif
+
+static int wm8770_probe(struct snd_soc_codec *codec)
+{
+ struct wm8770_priv *wm8770;
+ int ret;
+ int i;
+
+ wm8770 = snd_soc_codec_get_drvdata(codec);
+ wm8770->codec = codec;
+
+ codec->dapm.idle_bias_off = 1;
+
+ ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8770->control_type);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++)
+ wm8770->supplies[i].supply = wm8770_supply_names[i];
+
+ ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8770->supplies),
+ wm8770->supplies);
+ if (ret) {
+ dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+ return ret;
+ }
+
+ wm8770->disable_nb[0].notifier_call = wm8770_regulator_event_0;
+ wm8770->disable_nb[1].notifier_call = wm8770_regulator_event_1;
+ wm8770->disable_nb[2].notifier_call = wm8770_regulator_event_2;
+
+ /* This should really be moved into the regulator core */
+ for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++) {
+ ret = regulator_register_notifier(wm8770->supplies[i].consumer,
+ &wm8770->disable_nb[i]);
+ if (ret) {
+ dev_err(codec->dev,
+ "Failed to register regulator notifier: %d\n",
+ ret);
+ }
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
+ wm8770->supplies);
+ if (ret) {
+ dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+ goto err_reg_get;
+ }
+
+ ret = wm8770_reset(codec);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
+ goto err_reg_enable;
+ }
+
+ wm8770_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+ /* latch the volume update bits */
+ snd_soc_update_bits(codec, WM8770_MSDIGVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8770_MSALGVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8770_VOUT1RVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8770_VOUT2RVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8770_VOUT3RVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8770_VOUT4RVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8770_DAC1RVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8770_DAC2RVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8770_DAC3RVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8770_DAC4RVOL, 0x100, 0x100);
+
+ /* mute all DACs */
+ snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10, 0x10);
+
+ snd_soc_add_controls(codec, wm8770_snd_controls,
+ ARRAY_SIZE(wm8770_snd_controls));
+ snd_soc_dapm_new_controls(&codec->dapm, wm8770_dapm_widgets,
+ ARRAY_SIZE(wm8770_dapm_widgets));
+ snd_soc_dapm_add_routes(&codec->dapm, wm8770_intercon,
+ ARRAY_SIZE(wm8770_intercon));
+ return 0;
+
+err_reg_enable:
+ regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
+err_reg_get:
+ regulator_bulk_free(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
+ return ret;
+}
+
+static int wm8770_remove(struct snd_soc_codec *codec)
+{
+ struct wm8770_priv *wm8770;
+ int i;
+
+ wm8770 = snd_soc_codec_get_drvdata(codec);
+ wm8770_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+ for (i = 0; i < ARRAY_SIZE(wm8770->supplies); ++i)
+ regulator_unregister_notifier(wm8770->supplies[i].consumer,
+ &wm8770->disable_nb[i]);
+ regulator_bulk_free(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
+ return 0;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm8770 = {
+ .probe = wm8770_probe,
+ .remove = wm8770_remove,
+ .suspend = wm8770_suspend,
+ .resume = wm8770_resume,
+ .set_bias_level = wm8770_set_bias_level,
+ .reg_cache_size = ARRAY_SIZE(wm8770_reg_defs),
+ .reg_word_size = sizeof (u16),
+ .reg_cache_default = wm8770_reg_defs
+};
+
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit wm8770_spi_probe(struct spi_device *spi)
+{
+ struct wm8770_priv *wm8770;
+ int ret;
+
+ wm8770 = kzalloc(sizeof(struct wm8770_priv), GFP_KERNEL);
+ if (!wm8770)
+ return -ENOMEM;
+
+ wm8770->control_type = SND_SOC_SPI;
+ spi_set_drvdata(spi, wm8770);
+
+ ret = snd_soc_register_codec(&spi->dev,
+ &soc_codec_dev_wm8770, &wm8770_dai, 1);
+ if (ret < 0)
+ kfree(wm8770);
+ return ret;
+}
+
+static int __devexit wm8770_spi_remove(struct spi_device *spi)
+{
+ snd_soc_unregister_codec(&spi->dev);
+ kfree(spi_get_drvdata(spi));
+ return 0;
+}
+
+static struct spi_driver wm8770_spi_driver = {
+ .driver = {
+ .name = "wm8770",
+ .owner = THIS_MODULE,
+ },
+ .probe = wm8770_spi_probe,
+ .remove = __devexit_p(wm8770_spi_remove)
+};
+#endif
+
+static int __init wm8770_modinit(void)
+{
+ int ret = 0;
+
+#if defined(CONFIG_SPI_MASTER)
+ ret = spi_register_driver(&wm8770_spi_driver);
+ if (ret) {
+ printk(KERN_ERR "Failed to register wm8770 SPI driver: %d\n",
+ ret);
+ }
+#endif
+ return ret;
+}
+module_init(wm8770_modinit);
+
+static void __exit wm8770_exit(void)
+{
+#if defined(CONFIG_SPI_MASTER)
+ spi_unregister_driver(&wm8770_spi_driver);
+#endif
+}
+module_exit(wm8770_exit);
+
+MODULE_DESCRIPTION("ASoC WM8770 driver");
+MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");