[alsa-devel] [PATCH] ASoC: Add WM8776 CODEC driver
Mark Brown
broonie at opensource.wolfsonmicro.com
Thu Aug 6 12:17:45 CEST 2009
The WM8776 is a high performance, stereo audio CODEC with five channel
input selector. The WM8776 is ideal for surround sound processing
applications for home hi-fi, DVD-RW and other audio visual equipment.
This driver implements support for most WM8776 features - currently the
ADC automatic level control/limiter functionality is omitted.
Signed-off-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
---
sound/soc/codecs/Kconfig | 4 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/wm8776.c | 781 +++++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/wm8776.h | 51 +++
4 files changed, 838 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/codecs/wm8776.c
create mode 100644 sound/soc/codecs/wm8776.h
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index b6c7f7a..8cd24b0 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -33,6 +33,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_WM8731 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8750 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8753 if SND_SOC_I2C_AND_SPI
+ select SND_SOC_WM8776 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8900 if I2C
select SND_SOC_WM8903 if I2C
select SND_SOC_WM8971 if I2C
@@ -132,6 +133,9 @@ config SND_SOC_WM8750
config SND_SOC_WM8753
tristate
+config SND_SOC_WM8776
+ tristate
+
config SND_SOC_WM8900
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index f265380..e80f164 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -21,6 +21,7 @@ snd-soc-wm8728-objs := wm8728.o
snd-soc-wm8731-objs := wm8731.o
snd-soc-wm8750-objs := wm8750.o
snd-soc-wm8753-objs := wm8753.o
+snd-soc-wm8776-objs := wm8776.o
snd-soc-wm8900-objs := wm8900.o
snd-soc-wm8903-objs := wm8903.o
snd-soc-wm8971-objs := wm8971.o
@@ -52,6 +53,7 @@ obj-$(CONFIG_SND_SOC_WM8728) += snd-soc-wm8728.o
obj-$(CONFIG_SND_SOC_WM8731) += snd-soc-wm8731.o
obj-$(CONFIG_SND_SOC_WM8750) += snd-soc-wm8750.o
obj-$(CONFIG_SND_SOC_WM8753) += snd-soc-wm8753.o
+obj-$(CONFIG_SND_SOC_WM8776) += snd-soc-wm8776.o
obj-$(CONFIG_SND_SOC_WM8900) += snd-soc-wm8900.o
obj-$(CONFIG_SND_SOC_WM8903) += snd-soc-wm8903.o
obj-$(CONFIG_SND_SOC_WM8971) += snd-soc-wm8971.o
diff --git a/sound/soc/codecs/wm8776.c b/sound/soc/codecs/wm8776.c
new file mode 100644
index 0000000..ee12bf8
--- /dev/null
+++ b/sound/soc/codecs/wm8776.c
@@ -0,0 +1,781 @@
+/*
+ * wm8776.c -- WM8776 ALSA SoC Audio driver
+ *
+ * Copyright 2009 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie at 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.
+ *
+ * TODO: Input ALC/limiter support
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.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 "wm8776.h"
+
+static struct snd_soc_codec *wm8776_codec;
+struct snd_soc_codec_device soc_codec_dev_wm8776;
+
+/* codec private data */
+struct wm8776_priv {
+ struct snd_soc_codec codec;
+ u16 reg_cache[WM8776_CACHEREGNUM];
+ int sysclk[2];
+};
+
+#ifdef CONFIG_SPI_MASTER
+static int wm8776_spi_write(struct spi_device *spi, const char *data, int len);
+#endif
+
+static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
+ 0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */
+ 0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */
+ 0x22, 0x22, 0x22, 0x08, 0xcf, /* 14 */
+ 0xcf, 0x7b, 0x00, 0x32, 0x00, /* 19 */
+ 0xa6, 0x01, 0x01
+};
+
+/*
+ * read wm8776 register cache
+ */
+static inline unsigned int wm8776_read_reg_cache(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ u16 *cache = codec->reg_cache;
+ if (reg >= WM8776_CACHEREGNUM)
+ return -1;
+ return cache[reg];
+}
+
+/*
+ * write wm8776 register cache
+ */
+static inline void wm8776_write_reg_cache(struct snd_soc_codec *codec,
+ u16 reg, unsigned int value)
+{
+ u16 *cache = codec->reg_cache;
+ if (reg >= WM8776_CACHEREGNUM)
+ return;
+ cache[reg] = value;
+}
+
+/*
+ * write to the WM8776 register space
+ */
+static int wm8776_write(struct snd_soc_codec *codec, unsigned int reg,
+ unsigned int value)
+{
+ u8 data[2];
+
+ data[0] = (reg << 1) | ((value >> 8) & 0x0001);
+ data[1] = value & 0x00ff;
+
+ wm8776_write_reg_cache(codec, reg, value);
+ if (codec->hw_write(codec->control_data, data, 2) == 2)
+ return 0;
+ else
+ return -EIO;
+}
+
+static int wm8776_reset(struct snd_soc_codec *codec)
+{
+ return wm8776_write(codec, WM8776_RESET, 0);
+}
+
+static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
+static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
+static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
+
+static const struct snd_kcontrol_new wm8776_snd_controls[] = {
+SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
+ 0, 127, 0, hp_tlv),
+SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
+ 0, 255, 0, dac_tlv),
+SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
+
+SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
+
+SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
+ 0, 255, 0, adc_tlv),
+SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
+SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
+SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
+};
+
+static const struct snd_kcontrol_new inmix_controls[] = {
+SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
+SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
+SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
+SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
+SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
+};
+
+static const struct snd_kcontrol_new outmix_controls[] = {
+SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
+SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
+SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
+SND_SOC_DAPM_INPUT("AUX"),
+SND_SOC_DAPM_INPUT("AUX"),
+
+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_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
+ inmix_controls, ARRAY_SIZE(inmix_controls)),
+
+SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
+SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
+
+SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
+ outmix_controls, ARRAY_SIZE(outmix_controls)),
+
+SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
+
+SND_SOC_DAPM_OUTPUT("VOUT"),
+
+SND_SOC_DAPM_OUTPUT("HPOUTL"),
+SND_SOC_DAPM_OUTPUT("HPOUTR"),
+};
+
+static const struct snd_soc_dapm_route routes[] = {
+ { "Input Mixer", "AIN1 Switch", "AIN1" },
+ { "Input Mixer", "AIN2 Switch", "AIN2" },
+ { "Input Mixer", "AIN3 Switch", "AIN3" },
+ { "Input Mixer", "AIN4 Switch", "AIN4" },
+ { "Input Mixer", "AIN5 Switch", "AIN5" },
+
+ { "ADC", NULL, "Input Mixer" },
+
+ { "Output Mixer", "DAC Switch", "DAC" },
+ { "Output Mixer", "AUX Switch", "AUX" },
+ { "Output Mixer", "Bypass Switch", "Input Mixer" },
+
+ { "VOUT", NULL, "Output Mixer" },
+
+ { "Headphone PGA", NULL, "Output Mixer" },
+
+ { "HPOUTL", NULL, "Headphone PGA" },
+ { "HPOUTR", NULL, "Headphone PGA" },
+};
+
+static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ int reg, iface, master;
+
+ switch (dai->id) {
+ case WM8776_DAI_DAC:
+ reg = WM8776_DACIFCTRL;
+ master = 0x80;
+ break;
+ case WM8776_DAI_ADC:
+ reg = WM8776_ADCIFCTRL;
+ master = 0x100;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ iface = 0;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ master = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ iface |= 0x0002;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ iface |= 0x0001;
+ break;
+ /* FIXME: CHECK A/B */
+ case SND_SOC_DAIFMT_DSP_A:
+ iface |= 0x0003;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ iface |= 0x0007;
+ 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 |= 0x00c;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ iface |= 0x008;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ iface |= 0x004;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Finally, write out the values */
+ snd_soc_update_bits(codec, reg, 0xf, iface);
+ snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
+
+ return 0;
+}
+
+static int mclk_ratios[] = {
+ 128,
+ 192,
+ 256,
+ 384,
+ 512,
+ 768,
+};
+
+static int wm8776_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;
+ struct wm8776_priv *wm8776 = codec->private_data;
+ int iface_reg, iface;
+ int ratio_shift, master;
+ int i;
+
+ iface = 0;
+
+ switch (dai->id) {
+ case WM8776_DAI_DAC:
+ iface_reg = WM8776_DACIFCTRL;
+ master = 0x80;
+ ratio_shift = 4;
+ break;
+ case WM8776_DAI_ADC:
+ iface_reg = WM8776_ADCIFCTRL;
+ master = 0x100;
+ ratio_shift = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+
+ /* Set word length */
+ 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;
+ }
+
+ /* Only need to set MCLK/LRCLK ratio if we're master */
+ if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
+ for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
+ if (wm8776->sysclk[dai->id] / params_rate(params)
+ == mclk_ratios[i])
+ break;
+ }
+
+ if (i == ARRAY_SIZE(mclk_ratios)) {
+ dev_err(codec->dev,
+ "Unable to configure MCLK ratio %d/%d\n",
+ wm8776->sysclk[dai->id], params_rate(params));
+ return -EINVAL;
+ }
+
+ dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
+
+ snd_soc_update_bits(codec, WM8776_MSTRCTRL,
+ 0x7 << ratio_shift, i << ratio_shift);
+ } else {
+ dev_dbg(codec->dev, "DAI in slave mode\n");
+ }
+
+ snd_soc_update_bits(codec, iface_reg, 0x30, iface);
+
+ return 0;
+}
+
+static int wm8776_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_codec *codec = dai->codec;
+
+ return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
+}
+
+static int wm8776_set_sysclk(struct snd_soc_dai *dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct wm8776_priv *wm8776 = codec->private_data;
+
+ BUG_ON(dai->id >= ARRAY_SIZE(wm8776->sysclk));
+
+ wm8776->sysclk[dai->id] = freq;
+
+ return 0;
+}
+
+static int wm8776_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (codec->bias_level == SND_SOC_BIAS_OFF) {
+ /* Disable the global powerdown; DAPM does the rest */
+ snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
+ }
+
+ break;
+ case SND_SOC_BIAS_OFF:
+ snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
+ break;
+ }
+
+ codec->bias_level = level;
+ return 0;
+}
+
+#define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
+ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
+ SNDRV_PCM_RATE_96000)
+
+
+#define WM8776_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 wm8776_dac_ops = {
+ .digital_mute = wm8776_mute,
+ .hw_params = wm8776_hw_params,
+ .set_fmt = wm8776_set_fmt,
+ .set_sysclk = wm8776_set_sysclk,
+};
+
+static struct snd_soc_dai_ops wm8776_adc_ops = {
+ .hw_params = wm8776_hw_params,
+ .set_fmt = wm8776_set_fmt,
+ .set_sysclk = wm8776_set_sysclk,
+};
+
+struct snd_soc_dai wm8776_dai[] = {
+ {
+ .name = "WM8776 Playback",
+ .id = WM8776_DAI_DAC,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = WM8776_RATES,
+ .formats = WM8776_FORMATS,
+ },
+ .ops = &wm8776_dac_ops,
+ },
+ {
+ .name = "WM8776 Capture",
+ .id = WM8776_DAI_ADC,
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = WM8776_RATES,
+ .formats = WM8776_FORMATS,
+ },
+ .ops = &wm8776_adc_ops,
+ },
+};
+EXPORT_SYMBOL_GPL(wm8776_dai);
+
+#ifdef CONFIG_PM
+static int wm8776_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+
+ wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+ return 0;
+}
+
+static int wm8776_resume(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+ int i;
+ u8 data[2];
+ u16 *cache = codec->reg_cache;
+
+ /* Sync reg_cache with the hardware */
+ for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
+ data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
+ data[1] = cache[i] & 0x00ff;
+ codec->hw_write(codec->control_data, data, 2);
+ }
+
+ wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+ return 0;
+}
+#else
+#define wm8776_suspend NULL
+#define wm8776_resume NULL
+#endif
+
+static int wm8776_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec;
+ int ret = 0;
+
+ if (wm8776_codec == NULL) {
+ dev_err(&pdev->dev, "Codec device not registered\n");
+ return -ENODEV;
+ }
+
+ socdev->card->codec = wm8776_codec;
+ codec = wm8776_codec;
+
+ /* register pcms */
+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+ if (ret < 0) {
+ dev_err(codec->dev, "failed to create pcms: %d\n", ret);
+ goto pcm_err;
+ }
+
+ snd_soc_add_controls(codec, wm8776_snd_controls,
+ ARRAY_SIZE(wm8776_snd_controls));
+ snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets,
+ ARRAY_SIZE(wm8776_dapm_widgets));
+ snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));
+
+ ret = snd_soc_init_card(socdev);
+ if (ret < 0) {
+ dev_err(codec->dev, "failed to register card: %d\n", ret);
+ goto card_err;
+ }
+
+ return ret;
+
+card_err:
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+pcm_err:
+ return ret;
+}
+
+/* power down chip */
+static int wm8776_remove(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+
+ return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_wm8776 = {
+ .probe = wm8776_probe,
+ .remove = wm8776_remove,
+ .suspend = wm8776_suspend,
+ .resume = wm8776_resume,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_wm8776);
+
+static int wm8776_register(struct wm8776_priv *wm8776)
+{
+ int ret, i;
+ struct snd_soc_codec *codec = &wm8776->codec;
+
+ if (wm8776_codec) {
+ dev_err(codec->dev, "Another WM8776 is registered\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ mutex_init(&codec->mutex);
+ INIT_LIST_HEAD(&codec->dapm_widgets);
+ INIT_LIST_HEAD(&codec->dapm_paths);
+
+ codec->private_data = wm8776;
+ codec->name = "WM8776";
+ codec->owner = THIS_MODULE;
+ codec->read = wm8776_read_reg_cache;
+ codec->write = wm8776_write;
+ codec->bias_level = SND_SOC_BIAS_OFF;
+ codec->set_bias_level = wm8776_set_bias_level;
+ codec->dai = wm8776_dai;
+ codec->num_dai = ARRAY_SIZE(wm8776_dai);
+ codec->reg_cache_size = WM8776_CACHEREGNUM;
+ codec->reg_cache = &wm8776->reg_cache;
+
+ memcpy(codec->reg_cache, wm8776_reg, sizeof(wm8776_reg));
+
+ for (i = 0; i < ARRAY_SIZE(wm8776_dai); i++)
+ wm8776_dai[i].dev = codec->dev;
+
+ ret = wm8776_reset(codec);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
+ goto err;
+ }
+
+ wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+ /* Latch the update bits; right channel only since we always
+ * update both. */
+ snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
+
+ wm8776_codec = codec;
+
+ ret = snd_soc_register_codec(codec);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to register codec: %d\n", ret);
+ goto err;
+ }
+
+ ret = snd_soc_register_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to register DAIs: %d\n", ret);
+ goto err_codec;
+ }
+
+ return 0;
+
+err_codec:
+ snd_soc_unregister_codec(codec);
+err:
+ kfree(wm8776);
+ return ret;
+}
+
+static void wm8776_unregister(struct wm8776_priv *wm8776)
+{
+ wm8776_set_bias_level(&wm8776->codec, SND_SOC_BIAS_OFF);
+ snd_soc_unregister_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
+ snd_soc_unregister_codec(&wm8776->codec);
+ kfree(wm8776);
+ wm8776_codec = NULL;
+}
+
+#if defined(CONFIG_SPI_MASTER)
+static int wm8776_spi_write(struct spi_device *spi, const char *data, int len)
+{
+ struct spi_transfer t;
+ struct spi_message m;
+ u8 msg[2];
+
+ if (len <= 0)
+ return 0;
+
+ msg[0] = data[0];
+ msg[1] = data[1];
+
+ spi_message_init(&m);
+ memset(&t, 0, (sizeof t));
+
+ t.tx_buf = &msg[0];
+ t.len = len;
+
+ spi_message_add_tail(&t, &m);
+ spi_sync(spi, &m);
+
+ return len;
+}
+
+static int __devinit wm8776_spi_probe(struct spi_device *spi)
+{
+ struct snd_soc_codec *codec;
+ struct wm8776_priv *wm8776;
+
+ wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
+ if (wm8776 == NULL)
+ return -ENOMEM;
+
+ codec = &wm8776->codec;
+ codec->control_data = spi;
+ codec->hw_write = (hw_write_t)wm8776_spi_write;
+ codec->dev = &spi->dev;
+
+ dev_set_drvdata(&spi->dev, wm8776);
+
+ return wm8776_register(wm8776);
+}
+
+static int __devexit wm8776_spi_remove(struct spi_device *spi)
+{
+ struct wm8776_priv *wm8776 = dev_get_drvdata(&spi->dev);
+
+ wm8776_unregister(wm8776);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int wm8776_spi_suspend(struct spi_device *spi, pm_message_t msg)
+{
+ return snd_soc_suspend_device(&spi->dev);
+}
+
+static int wm8776_spi_resume(struct spi_device *spi)
+{
+ return snd_soc_resume_device(&spi->dev);
+}
+#else
+#define wm8776_spi_suspend NULL
+#define wm8776_spi_resume NULL
+#endif
+
+static struct spi_driver wm8776_spi_driver = {
+ .driver = {
+ .name = "wm8776",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = wm8776_spi_probe,
+ .suspend = wm8776_spi_suspend,
+ .resume = wm8776_spi_resume,
+ .remove = __devexit_p(wm8776_spi_remove),
+};
+#endif /* CONFIG_SPI_MASTER */
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct wm8776_priv *wm8776;
+ struct snd_soc_codec *codec;
+
+ wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
+ if (wm8776 == NULL)
+ return -ENOMEM;
+
+ codec = &wm8776->codec;
+ codec->hw_write = (hw_write_t)i2c_master_send;
+
+ i2c_set_clientdata(i2c, wm8776);
+ codec->control_data = i2c;
+
+ codec->dev = &i2c->dev;
+
+ return wm8776_register(wm8776);
+}
+
+static __devexit int wm8776_i2c_remove(struct i2c_client *client)
+{
+ struct wm8776_priv *wm8776 = i2c_get_clientdata(client);
+ wm8776_unregister(wm8776);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int wm8776_i2c_suspend(struct i2c_client *i2c, pm_message_t msg)
+{
+ return snd_soc_suspend_device(&i2c->dev);
+}
+
+static int wm8776_i2c_resume(struct i2c_client *i2c)
+{
+ return snd_soc_resume_device(&i2c->dev);
+}
+#else
+#define wm8776_i2c_suspend NULL
+#define wm8776_i2c_resume NULL
+#endif
+
+static const struct i2c_device_id wm8776_i2c_id[] = {
+ { "wm8776", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
+
+static struct i2c_driver wm8776_i2c_driver = {
+ .driver = {
+ .name = "wm8776",
+ .owner = THIS_MODULE,
+ },
+ .probe = wm8776_i2c_probe,
+ .remove = __devexit_p(wm8776_i2c_remove),
+ .suspend = wm8776_i2c_suspend,
+ .resume = wm8776_i2c_resume,
+ .id_table = wm8776_i2c_id,
+};
+#endif
+
+static int __init wm8776_modinit(void)
+{
+ int ret;
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+ ret = i2c_add_driver(&wm8776_i2c_driver);
+ if (ret != 0) {
+ printk(KERN_ERR "Failed to register WM8776 I2C driver: %d\n",
+ ret);
+ }
+#endif
+#if defined(CONFIG_SPI_MASTER)
+ ret = spi_register_driver(&wm8776_spi_driver);
+ if (ret != 0) {
+ printk(KERN_ERR "Failed to register WM8776 SPI driver: %d\n",
+ ret);
+ }
+#endif
+ return 0;
+}
+module_init(wm8776_modinit);
+
+static void __exit wm8776_exit(void)
+{
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+ i2c_del_driver(&wm8776_i2c_driver);
+#endif
+#if defined(CONFIG_SPI_MASTER)
+ spi_unregister_driver(&wm8776_spi_driver);
+#endif
+}
+module_exit(wm8776_exit);
+
+MODULE_DESCRIPTION("ASoC WM8776 driver");
+MODULE_AUTHOR("Mark Brown <broonie at opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/wm8776.h b/sound/soc/codecs/wm8776.h
new file mode 100644
index 0000000..6606d25
--- /dev/null
+++ b/sound/soc/codecs/wm8776.h
@@ -0,0 +1,51 @@
+/*
+ * wm8776.h -- WM8776 ASoC driver
+ *
+ * Copyright 2009 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie at 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.
+ */
+
+#ifndef _WM8776_H
+#define _WM8776_H
+
+/* Registers */
+
+#define WM8776_HPLVOL 0x00
+#define WM8776_HPRVOL 0x01
+#define WM8776_HPMASTER 0x02
+#define WM8776_DACLVOL 0x03
+#define WM8776_DACRVOL 0x04
+#define WM8776_DACMASTER 0x05
+#define WM8776_PHASESWAP 0x06
+#define WM8776_DACCTRL1 0x07
+#define WM8776_DACMUTE 0x08
+#define WM8776_DACCTRL2 0x09
+#define WM8776_DACIFCTRL 0x0a
+#define WM8776_ADCIFCTRL 0x0b
+#define WM8776_MSTRCTRL 0x0c
+#define WM8776_PWRDOWN 0x0d
+#define WM8776_ADCLVOL 0x0e
+#define WM8776_ADCRVOL 0x0f
+#define WM8776_ALCCTRL1 0x10
+#define WM8776_ALCCTRL2 0x11
+#define WM8776_ALCCTRL3 0x12
+#define WM8776_NOISEGATE 0x13
+#define WM8776_LIMITER 0x14
+#define WM8776_ADCMUX 0x15
+#define WM8776_OUTMUX 0x16
+#define WM8776_RESET 0x17
+
+#define WM8776_CACHEREGNUM 0x17
+
+#define WM8776_DAI_DAC 0
+#define WM8776_DAI_ADC 1
+
+extern struct snd_soc_dai wm8776_dai[];
+extern struct snd_soc_codec_device soc_codec_dev_wm8776;
+
+#endif
--
1.6.3.3
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