1 files changed, 668 insertions, 0 deletions

diff --git a/sound/soc/codecs/uda134x.c b/sound/soc/codecs/uda134x.c
new file mode 100644
index 000000000000..a2c5064a774b
--- /dev/null
+++ b/sound/soc/codecs/uda134x.c
@@ -0,0 +1,668 @@
+/*
+ * uda134x.c  --  UDA134X ALSA SoC Codec driver
+ *
+ * Modifications by Christian Pellegrin <chripell@evolware.org>
+ *
+ * Copyright 2007 Dension Audio Systems Ltd.
+ * Author: Zoltan Devai
+ *
+ * Based on the WM87xx drivers by Liam Girdwood and Richard Purdie
+ *
+ * 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/delay.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/uda134x.h>
+#include <sound/l3.h>
+
+#include "uda134x.h"
+
+
+#define POWER_OFF_ON_STANDBY 1
+/*
+  ALSA SOC usually puts the device in standby mode when it's not used
+  for sometime. If you define POWER_OFF_ON_STANDBY the driver will
+  turn off the ADC/DAC when this callback is invoked and turn it back
+  on when needed. Unfortunately this will result in a very light bump
+  (it can be audible only with good earphones). If this bothers you
+  just comment this line, you will have slightly higher power
+  consumption . Please note that sending the L3 command for ADC is
+  enough to make the bump, so it doesn't make difference if you
+  completely take off power from the codec.
+ */
+
+#define UDA134X_RATES SNDRV_PCM_RATE_8000_48000
+#define UDA134X_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
+                SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE)
+
+struct uda134x_priv {
+        int sysclk;
+        int dai_fmt;
+
+        struct snd_pcm_substream *master_substream;
+        struct snd_pcm_substream *slave_substream;
+};
+
+/* In-data addresses are hard-coded into the reg-cache values */
+static const char uda134x_reg[UDA134X_REGS_NUM] = {
+        /* Extended address registers */
+        0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
+        /* Status, data regs */
+        0x00, 0x83, 0x00, 0x40, 0x80, 0x00,
+};
+
+/*
+ * The codec has no support for reading its registers except for peak level...
+ */
+static inline unsigned int uda134x_read_reg_cache(struct snd_soc_codec *codec,
+        unsigned int reg)
+{
+        u8 *cache = codec->reg_cache;
+
+        if (reg >= UDA134X_REGS_NUM)
+                return -1;
+        return cache[reg];
+}
+
+/*
+ * Write the register cache
+ */
+static inline void uda134x_write_reg_cache(struct snd_soc_codec *codec,
+        u8 reg, unsigned int value)
+{
+        u8 *cache = codec->reg_cache;
+
+        if (reg >= UDA134X_REGS_NUM)
+                return;
+        cache[reg] = value;
+}
+
+/*
+ * Write to the uda134x registers
+ *
+ */
+static int uda134x_write(struct snd_soc_codec *codec, unsigned int reg,
+        unsigned int value)
+{
+        int ret;
+        u8 addr;
+        u8 data = value;
+        struct uda134x_platform_data *pd = codec->control_data;
+
+        pr_debug("%s reg: %02X, value:%02X\n", __func__, reg, value);
+
+        if (reg >= UDA134X_REGS_NUM) {
+                printk(KERN_ERR "%s unkown register: reg: %d",
+                       __func__, reg);
+                return -EINVAL;
+        }
+
+        uda134x_write_reg_cache(codec, reg, value);
+
+        switch (reg) {
+        case UDA134X_STATUS0:
+        case UDA134X_STATUS1:
+                addr = UDA134X_STATUS_ADDR;
+                break;
+        case UDA134X_DATA000:
+        case UDA134X_DATA001:
+        case UDA134X_DATA010:
+                addr = UDA134X_DATA0_ADDR;
+                break;
+        case UDA134X_DATA1:
+                addr = UDA134X_DATA1_ADDR;
+                break;
+        default:
+                /* It's an extended address register */
+                addr =  (reg | UDA134X_EXTADDR_PREFIX);
+
+                ret = l3_write(&pd->l3,
+                               UDA134X_DATA0_ADDR, &addr, 1);
+                if (ret != 1)
+                        return -EIO;
+
+                addr = UDA134X_DATA0_ADDR;
+                data = (value | UDA134X_EXTDATA_PREFIX);
+                break;
+        }
+
+        ret = l3_write(&pd->l3,
+                       addr, &data, 1);
+        if (ret != 1)
+                return -EIO;
+
+        return 0;
+}
+
+static inline void uda134x_reset(struct snd_soc_codec *codec)
+{
+        u8 reset_reg = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
+        uda134x_write(codec, UDA134X_STATUS0, reset_reg | (1<<6));
+        msleep(1);
+        uda134x_write(codec, UDA134X_STATUS0, reset_reg & ~(1<<6));
+}
+
+static int uda134x_mute(struct snd_soc_dai *dai, int mute)
+{
+        struct snd_soc_codec *codec = dai->codec;
+        u8 mute_reg = uda134x_read_reg_cache(codec, UDA134X_DATA010);
+
+        pr_debug("%s mute: %d\n", __func__, mute);
+
+        if (mute)
+                mute_reg |= (1<<2);
+        else
+                mute_reg &= ~(1<<2);
+
+        uda134x_write(codec, UDA134X_DATA010, mute_reg & ~(1<<2));
+
+        return 0;
+}
+
+static int uda134x_startup(struct snd_pcm_substream *substream,
+        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 uda134x_priv *uda134x = codec->private_data;
+        struct snd_pcm_runtime *master_runtime;
+
+        if (uda134x->master_substream) {
+                master_runtime = uda134x->master_substream->runtime;
+
+                pr_debug("%s constraining to %d bits at %d\n", __func__,
+                         master_runtime->sample_bits,
+                         master_runtime->rate);
+
+                snd_pcm_hw_constraint_minmax(substream->runtime,
+                                             SNDRV_PCM_HW_PARAM_RATE,
+                                             master_runtime->rate,
+                                             master_runtime->rate);
+
+                snd_pcm_hw_constraint_minmax(substream->runtime,
+                                             SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
+                                             master_runtime->sample_bits,
+                                             master_runtime->sample_bits);
+
+                uda134x->slave_substream = substream;
+        } else
+                uda134x->master_substream = substream;
+
+        return 0;
+}
+
+static void uda134x_shutdown(struct snd_pcm_substream *substream,
+        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 uda134x_priv *uda134x = codec->private_data;
+
+        if (uda134x->master_substream == substream)
+                uda134x->master_substream = uda134x->slave_substream;
+
+        uda134x->slave_substream = NULL;
+}
+
+static int uda134x_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 uda134x_priv *uda134x = codec->private_data;
+        u8 hw_params;
+
+        if (substream == uda134x->slave_substream) {
+                pr_debug("%s ignoring hw_params for slave substream\n",
+                         __func__);
+                return 0;
+        }
+
+        hw_params = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
+        hw_params &= STATUS0_SYSCLK_MASK;
+        hw_params &= STATUS0_DAIFMT_MASK;
+
+        pr_debug("%s sysclk: %d, rate:%d\n", __func__,
+                 uda134x->sysclk, params_rate(params));
+
+        /* set SYSCLK / fs ratio */
+        switch (uda134x->sysclk / params_rate(params)) {
+        case 512:
+                break;
+        case 384:
+                hw_params |= (1<<4);
+                break;
+        case 256:
+                hw_params |= (1<<5);
+                break;
+        default:
+                printk(KERN_ERR "%s unsupported fs\n", __func__);
+                return -EINVAL;
+        }
+
+        pr_debug("%s dai_fmt: %d, params_format:%d\n", __func__,
+                 uda134x->dai_fmt, params_format(params));
+
+        /* set DAI format and word length */
+        switch (uda134x->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+        case SND_SOC_DAIFMT_I2S:
+                break;
+        case SND_SOC_DAIFMT_RIGHT_J:
+                switch (params_format(params)) {
+                case SNDRV_PCM_FORMAT_S16_LE:
+                        hw_params |= (1<<1);
+                        break;
+                case SNDRV_PCM_FORMAT_S18_3LE:
+                        hw_params |= (1<<2);
+                        break;
+                case SNDRV_PCM_FORMAT_S20_3LE:
+                        hw_params |= ((1<<2) | (1<<1));
+                        break;
+                default:
+                        printk(KERN_ERR "%s unsupported format (right)\n",
+                               __func__);
+                        return -EINVAL;
+                }
+                break;
+        case SND_SOC_DAIFMT_LEFT_J:
+                hw_params |= (1<<3);
+                break;
+        default:
+                printk(KERN_ERR "%s unsupported format\n", __func__);
+                return -EINVAL;
+        }
+
+        uda134x_write(codec, UDA134X_STATUS0, hw_params);
+
+        return 0;
+}
+
+static int uda134x_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 uda134x_priv *uda134x = codec->private_data;
+
+        pr_debug("%s clk_id: %d, freq: %d, dir: %d\n", __func__,
+                 clk_id, freq, dir);
+
+        /* Anything between 256fs*8Khz and 512fs*48Khz should be acceptable
+           because the codec is slave. Of course limitations of the clock
+           master (the IIS controller) apply.
+           We'll error out on set_hw_params if it's not OK */
+        if ((freq >= (256 * 8000)) && (freq <= (512 * 48000))) {
+                uda134x->sysclk = freq;
+                return 0;
+        }
+
+        printk(KERN_ERR "%s unsupported sysclk\n", __func__);
+        return -EINVAL;
+}
+
+static int uda134x_set_dai_fmt(struct snd_soc_dai *codec_dai,
+                               unsigned int fmt)
+{
+        struct snd_soc_codec *codec = codec_dai->codec;
+        struct uda134x_priv *uda134x = codec->private_data;
+
+        pr_debug("%s fmt: %08X\n", __func__, fmt);
+
+        /* codec supports only full slave mode */
+        if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
+                printk(KERN_ERR "%s unsupported slave mode\n", __func__);
+                return -EINVAL;
+        }
+
+        /* no support for clock inversion */
+        if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
+                printk(KERN_ERR "%s unsupported clock inversion\n", __func__);
+                return -EINVAL;
+        }
+
+        /* We can't setup DAI format here as it depends on the word bit num */
+        /* so let's just store the value for later */
+        uda134x->dai_fmt = fmt;
+
+        return 0;
+}
+
+static int uda134x_set_bias_level(struct snd_soc_codec *codec,
+                                  enum snd_soc_bias_level level)
+{
+        u8 reg;
+        struct uda134x_platform_data *pd = codec->control_data;
+        int i;
+        u8 *cache = codec->reg_cache;
+
+        pr_debug("%s bias level %d\n", __func__, level);
+
+        switch (level) {
+        case SND_SOC_BIAS_ON:
+                /* ADC, DAC on */
+                reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
+                uda134x_write(codec, UDA134X_STATUS1, reg | 0x03);
+                break;
+        case SND_SOC_BIAS_PREPARE:
+                /* power on */
+                if (pd->power) {
+                        pd->power(1);
+                        /* Sync reg_cache with the hardware */
+                        for (i = 0; i < ARRAY_SIZE(uda134x_reg); i++)
+                                codec->write(codec, i, *cache++);
+                }
+                break;
+        case SND_SOC_BIAS_STANDBY:
+                /* ADC, DAC power off */
+                reg = uda134x_read_reg_cache(codec, UDA134X_STATUS1);
+                uda134x_write(codec, UDA134X_STATUS1, reg & ~(0x03));
+                break;
+        case SND_SOC_BIAS_OFF:
+                /* power off */
+                if (pd->power)
+                        pd->power(0);
+                break;
+        }
+        codec->bias_level = level;
+        return 0;
+}
+
+static const char *uda134x_dsp_setting[] = {"Flat", "Minimum1",
+                                            "Minimum2", "Maximum"};
+static const char *uda134x_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
+static const char *uda134x_mixmode[] = {"Differential", "Analog1",
+                                        "Analog2", "Both"};
+
+static const struct soc_enum uda134x_mixer_enum[] = {
+SOC_ENUM_SINGLE(UDA134X_DATA010, 0, 0x04, uda134x_dsp_setting),
+SOC_ENUM_SINGLE(UDA134X_DATA010, 3, 0x04, uda134x_deemph),
+SOC_ENUM_SINGLE(UDA134X_EA010, 0, 0x04, uda134x_mixmode),
+};
+
+static const struct snd_kcontrol_new uda1341_snd_controls[] = {
+SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
+SOC_SINGLE("Capture Volume", UDA134X_EA010, 2, 0x07, 0),
+SOC_SINGLE("Analog1 Volume", UDA134X_EA000, 0, 0x1F, 1),
+SOC_SINGLE("Analog2 Volume", UDA134X_EA001, 0, 0x1F, 1),
+
+SOC_SINGLE("Mic Sensitivity", UDA134X_EA010, 2, 7, 0),
+SOC_SINGLE("Mic Volume", UDA134X_EA101, 0, 0x1F, 0),
+
+SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
+SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
+
+SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
+SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
+SOC_ENUM("Input Mux", uda134x_mixer_enum[2]),
+
+SOC_SINGLE("AGC Switch", UDA134X_EA100, 4, 1, 0),
+SOC_SINGLE("AGC Target Volume", UDA134X_EA110, 0, 0x03, 1),
+SOC_SINGLE("AGC Timing", UDA134X_EA110, 2, 0x07, 0),
+
+SOC_SINGLE("DAC +6dB Switch", UDA134X_STATUS1, 6, 1, 0),
+SOC_SINGLE("ADC +6dB Switch", UDA134X_STATUS1, 5, 1, 0),
+SOC_SINGLE("ADC Polarity Switch", UDA134X_STATUS1, 4, 1, 0),
+SOC_SINGLE("DAC Polarity Switch", UDA134X_STATUS1, 3, 1, 0),
+SOC_SINGLE("Double Speed Playback Switch", UDA134X_STATUS1, 2, 1, 0),
+SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
+};
+
+static const struct snd_kcontrol_new uda1340_snd_controls[] = {
+SOC_SINGLE("Master Playback Volume", UDA134X_DATA000, 0, 0x3F, 1),
+
+SOC_SINGLE("Tone Control - Bass", UDA134X_DATA001, 2, 0xF, 0),
+SOC_SINGLE("Tone Control - Treble", UDA134X_DATA001, 0, 3, 0),
+
+SOC_ENUM("Sound Processing Filter", uda134x_mixer_enum[0]),
+SOC_ENUM("PCM Playback De-emphasis", uda134x_mixer_enum[1]),
+
+SOC_SINGLE("DC Filter Enable Switch", UDA134X_STATUS0, 0, 1, 0),
+};
+
+static int uda134x_add_controls(struct snd_soc_codec *codec)
+{
+        int err, i, n;
+        const struct snd_kcontrol_new *ctrls;
+        struct uda134x_platform_data *pd = codec->control_data;
+
+        switch (pd->model) {
+        case UDA134X_UDA1340:
+        case UDA134X_UDA1344:
+                n = ARRAY_SIZE(uda1340_snd_controls);
+                ctrls = uda1340_snd_controls;
+                break;
+        case UDA134X_UDA1341:
+                n = ARRAY_SIZE(uda1341_snd_controls);
+                ctrls = uda1341_snd_controls;
+                break;
+        default:
+                printk(KERN_ERR "%s unkown codec type: %d",
+                       __func__, pd->model);
+                return -EINVAL;
+        }
+
+        for (i = 0; i < n; i++) {
+                err = snd_ctl_add(codec->card,
+                                  snd_soc_cnew(&ctrls[i],
+                                               codec, NULL));
+                if (err < 0)
+                        return err;
+        }
+
+        return 0;
+}
+
+struct snd_soc_dai uda134x_dai = {
+        .name = "UDA134X",
+        /* playback capabilities */
+        .playback = {
+                .stream_name = "Playback",
+                .channels_min = 1,
+                .channels_max = 2,
+                .rates = UDA134X_RATES,
+                .formats = UDA134X_FORMATS,
+        },
+        /* capture capabilities */
+        .capture = {
+                .stream_name = "Capture",
+                .channels_min = 1,
+                .channels_max = 2,
+                .rates = UDA134X_RATES,
+                .formats = UDA134X_FORMATS,
+        },
+        /* pcm operations */
+        .ops = {
+                .startup = uda134x_startup,
+                .shutdown = uda134x_shutdown,
+                .hw_params = uda134x_hw_params,
+                .digital_mute = uda134x_mute,
+                .set_sysclk = uda134x_set_dai_sysclk,
+                .set_fmt = uda134x_set_dai_fmt,
+        }
+};
+EXPORT_SYMBOL(uda134x_dai);
+
+
+static int uda134x_soc_probe(struct platform_device *pdev)
+{
+        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+        struct snd_soc_codec *codec;
+        struct uda134x_priv *uda134x;
+        void *codec_setup_data = socdev->codec_data;
+        int ret = -ENOMEM;
+        struct uda134x_platform_data *pd;
+
+        printk(KERN_INFO "UDA134X SoC Audio Codec\n");
+
+        if (!codec_setup_data) {
+                printk(KERN_ERR "UDA134X SoC codec: "
+                       "missing L3 bitbang function\n");
+                return -ENODEV;
+        }
+
+        pd = codec_setup_data;
+        switch (pd->model) {
+        case UDA134X_UDA1340:
+        case UDA134X_UDA1341:
+        case UDA134X_UDA1344:
+                break;
+        default:
+                printk(KERN_ERR "UDA134X SoC codec: "
+                       "unsupported model %d\n",
+                        pd->model);
+                return -EINVAL;
+        }
+
+        socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+        if (socdev->codec == NULL)
+                return ret;
+
+        codec = socdev->codec;
+
+        uda134x = kzalloc(sizeof(struct uda134x_priv), GFP_KERNEL);
+        if (uda134x == NULL)
+                goto priv_err;
+        codec->private_data = uda134x;
+
+        codec->reg_cache = kmemdup(uda134x_reg, sizeof(uda134x_reg),
+                                   GFP_KERNEL);
+        if (codec->reg_cache == NULL)
+                goto reg_err;
+
+        mutex_init(&codec->mutex);
+
+        codec->reg_cache_size = sizeof(uda134x_reg);
+        codec->reg_cache_step = 1;
+
+        codec->name = "UDA134X";
+        codec->owner = THIS_MODULE;
+        codec->dai = &uda134x_dai;
+        codec->num_dai = 1;
+        codec->read = uda134x_read_reg_cache;
+        codec->write = uda134x_write;
+#ifdef POWER_OFF_ON_STANDBY
+        codec->set_bias_level = uda134x_set_bias_level;
+#endif
+        INIT_LIST_HEAD(&codec->dapm_widgets);
+        INIT_LIST_HEAD(&codec->dapm_paths);
+
+        codec->control_data = codec_setup_data;
+
+        if (pd->power)
+                pd->power(1);
+
+        uda134x_reset(codec);
+
+        /* register pcms */
+        ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+        if (ret < 0) {
+                printk(KERN_ERR "UDA134X: failed to register pcms\n");
+                goto pcm_err;
+        }
+
+        ret = uda134x_add_controls(codec);
+        if (ret < 0) {
+                printk(KERN_ERR "UDA134X: failed to register controls\n");
+                goto pcm_err;
+        }
+
+        ret = snd_soc_init_card(socdev);
+        if (ret < 0) {
+                printk(KERN_ERR "UDA134X: failed to register card\n");
+                goto card_err;
+        }
+
+        return 0;
+
+card_err:
+        snd_soc_free_pcms(socdev);
+        snd_soc_dapm_free(socdev);
+pcm_err:
+        kfree(codec->reg_cache);
+reg_err:
+        kfree(codec->private_data);
+priv_err:
+        kfree(codec);
+        return ret;
+}
+
+/* power down chip */
+static int uda134x_soc_remove(struct platform_device *pdev)
+{
+        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+        struct snd_soc_codec *codec = socdev->codec;
+
+        uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+        uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+        snd_soc_free_pcms(socdev);
+        snd_soc_dapm_free(socdev);
+
+        kfree(codec->private_data);
+        kfree(codec->reg_cache);
+        kfree(codec);
+
+        return 0;
+}
+
+#if defined(CONFIG_PM)
+static int uda134x_soc_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;
+
+        uda134x_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+        uda134x_set_bias_level(codec, SND_SOC_BIAS_OFF);
+        return 0;
+}
+
+static int uda134x_soc_resume(struct platform_device *pdev)
+{
+        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+        struct snd_soc_codec *codec = socdev->codec;
+
+        uda134x_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
+        uda134x_set_bias_level(codec, SND_SOC_BIAS_ON);
+        return 0;
+}
+#else
+#define uda134x_soc_suspend NULL
+#define uda134x_soc_resume NULL
+#endif /* CONFIG_PM */
+
+struct snd_soc_codec_device soc_codec_dev_uda134x = {
+        .probe =        uda134x_soc_probe,
+        .remove =       uda134x_soc_remove,
+        .suspend =      uda134x_soc_suspend,
+        .resume =       uda134x_soc_resume,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_uda134x);
+
+static int __init uda134x_init(void)
+{
+        return snd_soc_register_dai(&uda134x_dai);
+}
+module_init(uda134x_init);
+
+static void __exit uda134x_exit(void)
+{
+        snd_soc_unregister_dai(&uda134x_dai);
+}
+module_exit(uda134x_exit);
+
+MODULE_DESCRIPTION("UDA134X ALSA soc codec driver");
+MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
+MODULE_LICENSE("GPL");