Added: trunk/sound/soc/codecs/ssm2604.c (0 => 8444)
--- trunk/sound/soc/codecs/ssm2604.c (rev 0)
+++ trunk/sound/soc/codecs/ssm2604.c 2010-03-11 09:47:28 UTC (rev 8444)
@@ -0,0 +1,642 @@
+/*
+ * Driver for ssm2604 sound codec
+ *
+ * Copyright 2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#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 <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 "ssm2604.h"
+
+#define SSM2604_VERSION "0.1"
+
+struct snd_soc_codec_device soc_codec_dev_ssm2604;
+static struct snd_soc_codec *ssm2604_codec;
+/* codec private data */
+struct ssm2604_priv {
+ unsigned int sysclk;
+ struct snd_pcm_substream *master_substream;
+ struct snd_pcm_substream *slave_substream;
+ struct snd_soc_codec codec;
+};
+
+/*
+ * ssm2604 register cache
+ * We can't read the ssm2604 register space when we are
+ * using 2 wire for device control, so we cache them instead.
+ * There is no point in caching the reset register
+ */
+static const u16 ssm2604_reg[SSM2604_CACHEREGNUM] = {
+ 0x0017, 0x0017, 0x0000, 0x0000,
+ 0x0000, 0x000a, 0x0000, 0x0000
+};
+
+#define ssm2604_reset(c) snd_soc_write(c, SSM2604_RESET, 0)
+
+static const char *ssm2604_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
+
+static const struct soc_enum ssm2604_enum[] = {
+ SOC_ENUM_SINGLE(SSM2604_APDIGI, 1, 4, ssm2604_deemph),
+};
+
+static const struct snd_kcontrol_new ssm2604_snd_controls[] = {
+
+SOC_DOUBLE_R("Capture Volume", SSM2604_LINVOL, SSM2604_RINVOL, 0, 31, 0),
+SOC_DOUBLE_R("Capture Switch", SSM2604_LINVOL, SSM2604_RINVOL, 7, 1, 1),
+
+SOC_SINGLE("ADC High Pass Filter Switch", SSM2604_APDIGI, 0, 1, 1),
+SOC_SINGLE("Store DC Offset Switch", SSM2604_APDIGI, 4, 1, 0),
+
+SOC_ENUM("Capture Source", ssm2604_enum[0]),
+
+SOC_ENUM("Playback De-emphasis", ssm2604_enum[1]),
+};
+
+/* Output Mixer */
+static const struct snd_kcontrol_new ssm2604_output_mixer_controls[] = {
+SOC_DAPM_SINGLE("Line Bypass Switch", SSM2604_APANA, 3, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget ssm2604_dapm_widgets[] = {
+SND_SOC_DAPM_MIXER("Output Mixer", SSM2604_PWR, 4, 1,
+ &ssm2604_output_mixer_controls[0],
+ ARRAY_SIZE(ssm2604_output_mixer_controls)),
+SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2604_PWR, 3, 1),
+SND_SOC_DAPM_OUTPUT("LOUT"),
+SND_SOC_DAPM_OUTPUT("ROUT"),
+SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2604_PWR, 2, 1),
+SND_SOC_DAPM_PGA("Line Input", SSM2604_PWR, 0, 1, NULL, 0),
+SND_SOC_DAPM_INPUT("RLINEIN"),
+SND_SOC_DAPM_INPUT("LLINEIN"),
+};
+
+static const struct snd_soc_dapm_route audio_conn[] = {
+ /* output mixer */
+ {"Output Mixer", "Line Bypass Switch", "Line Input"},
+ {"Output Mixer", "HiFi Playback Switch", "DAC"},
+
+ /* outputs */
+ {"ROUT", NULL, "Output Mixer"},
+ {"LOUT", NULL, "Output Mixer"},
+
+ /* input mux */
+ {"Input Mux", "Line", "Line Input"},
+ {"ADC", NULL, "Input Mux"},
+
+ /* inputs */
+ {"Line Input", NULL, "LLINEIN"},
+ {"Line Input", NULL, "RLINEIN"},
+};
+
+static int ssm2604_add_widgets(struct snd_soc_codec *codec)
+{
+ snd_soc_dapm_new_controls(codec, ssm2604_dapm_widgets,
+ ARRAY_SIZE(ssm2604_dapm_widgets));
+
+ snd_soc_dapm_add_routes(codec, audio_conn, ARRAY_SIZE(audio_conn));
+
+ return 0;
+}
+
+struct _coeff_div {
+ u32 mclk;
+ u32 rate;
+ u16 fs;
+ u8 sr:4;
+ u8 bosr:1;
+ u8 usb:1;
+};
+
+/* codec mclk clock divider coefficients */
+static const struct _coeff_div coeff_div[] = {
+ /* 48k */
+ {12288000, 48000, 256, 0x0, 0x0, 0x0},
+ {18432000, 48000, 384, 0x0, 0x1, 0x0},
+ {12000000, 48000, 250, 0x0, 0x0, 0x1},
+
+ /* 32k */
+ {12288000, 32000, 384, 0x6, 0x0, 0x0},
+ {18432000, 32000, 576, 0x6, 0x1, 0x0},
+ {12000000, 32000, 375, 0x6, 0x0, 0x1},
+
+ /* 8k */
+ {12288000, 8000, 1536, 0x3, 0x0, 0x0},
+ {18432000, 8000, 2304, 0x3, 0x1, 0x0},
+ {11289600, 8000, 1408, 0xb, 0x0, 0x0},
+ {16934400, 8000, 2112, 0xb, 0x1, 0x0},
+ {12000000, 8000, 1500, 0x3, 0x0, 0x1},
+
+ /* 96k */
+ {12288000, 96000, 128, 0x7, 0x0, 0x0},
+ {18432000, 96000, 192, 0x7, 0x1, 0x0},
+ {12000000, 96000, 125, 0x7, 0x0, 0x1},
+
+ /* 44.1k */
+ {11289600, 44100, 256, 0x8, 0x0, 0x0},
+ {16934400, 44100, 384, 0x8, 0x1, 0x0},
+ {12000000, 44100, 272, 0x8, 0x1, 0x1},
+
+ /* 88.2k */
+ {11289600, 88200, 128, 0xf, 0x0, 0x0},
+ {16934400, 88200, 192, 0xf, 0x1, 0x0},
+ {12000000, 88200, 136, 0xf, 0x1, 0x1},
+};
+
+static inline int get_coeff(int mclk, int rate)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
+ if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
+ return i;
+ }
+ return i;
+}
+
+static int ssm2604_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ u16 srate;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_codec *codec = socdev->card->codec;
+ struct ssm2604_priv *ssm2604 = codec->private_data;
+ struct i2c_client *i2c = codec->control_data;
+ u16 iface = snd_soc_read(codec, SSM2604_IFACE) & 0xfff3;
+ int i = get_coeff(ssm2604->sysclk, params_rate(params));
+
+ if (substream == ssm2604->slave_substream) {
+ dev_dbg(&i2c->dev, "Ignoring hw_params for slave substream\n");
+ return 0;
+ }
+
+ /*no match is found*/
+ if (i == ARRAY_SIZE(coeff_div))
+ return -EINVAL;
+
+ srate = (coeff_div[i].sr << 2) |
+ (coeff_div[i].bosr << 1) | coeff_div[i].usb;
+
+ snd_soc_write(codec, SSM2604_ACTIVE, 0);
+ snd_soc_write(codec, SSM2604_SRATE, srate);
+
+ /* bit size */
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ iface |= 0x0004;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ iface |= 0x0008;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ iface |= 0x000c;
+ break;
+ }
+ snd_soc_write(codec, SSM2604_IFACE, iface);
+ snd_soc_write(codec, SSM2604_ACTIVE, ACTIVE_ACTIVATE_CODEC);
+ return 0;
+}
+
+static int ssm2604_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->card->codec;
+ struct ssm2604_priv *ssm2604 = codec->private_data;
+ struct i2c_client *i2c = codec->control_data;
+ struct snd_pcm_runtime *master_runtime;
+
+ /* The DAI has shared clocks so if we already have a playback or
+ * capture going then constrain this substream to match it.
+ * TODO: the ssm2604 allows pairs of non-matching PB/REC rates
+ */
+ if (ssm2604->master_substream) {
+ master_runtime = ssm2604->master_substream->runtime;
+ dev_dbg(&i2c->dev, "Constraining to %d bits at %dHz\n",
+ master_runtime->sample_bits,
+ master_runtime->rate);
+
+ if (master_runtime->rate != 0)
+ snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_RATE,
+ master_runtime->rate,
+ master_runtime->rate);
+
+ if (master_runtime->sample_bits != 0)
+ snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
+ master_runtime->sample_bits,
+ master_runtime->sample_bits);
+
+ ssm2604->slave_substream = substream;
+ } else
+ ssm2604->master_substream = substream;
+
+ return 0;
+}
+
+static int ssm2604_pcm_prepare(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->card->codec;
+ /* set active */
+ snd_soc_write(codec, SSM2604_ACTIVE, ACTIVE_ACTIVATE_CODEC);
+
+ return 0;
+}
+
+static void ssm2604_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->card->codec;
+ struct ssm2604_priv *ssm2604 = codec->private_data;
+
+ /* deactivate */
+ if (!codec->active)
+ snd_soc_write(codec, SSM2604_ACTIVE, 0);
+
+ if (ssm2604->master_substream == substream)
+ ssm2604->master_substream = ssm2604->slave_substream;
+
+ ssm2604->slave_substream = NULL;
+}
+
+static int ssm2604_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ u16 mute_reg = snd_soc_read(codec, SSM2604_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
+ if (mute)
+ snd_soc_write(codec, SSM2604_APDIGI,
+ mute_reg | APDIGI_ENABLE_DAC_MUTE);
+ else
+ snd_soc_write(codec, SSM2604_APDIGI, mute_reg);
+ return 0;
+}
+
+static int ssm2604_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 ssm2604_priv *ssm2604 = codec->private_data;
+ switch (freq) {
+ case 11289600:
+ case 12000000:
+ case 12288000:
+ case 16934400:
+ case 18432000:
+ ssm2604->sysclk = freq;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int ssm2604_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u16 iface = 0;
+
+ /* set master/slave audio interface */
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ iface |= 0x0040;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* interface format */
+ 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;
+ case SND_SOC_DAIFMT_DSP_A:
+ iface |= 0x0013;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ iface |= 0x0003;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* clock inversion */
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ iface |= 0x0090;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ iface |= 0x0080;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ iface |= 0x0010;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* set iface */
+ snd_soc_write(codec, SSM2604_IFACE, iface);
+ return 0;
+}
+
+static int ssm2604_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ u16 reg = snd_soc_read(codec, SSM2604_PWR) & 0xff7f;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ /* vref/mid, osc on, dac unmute */
+ snd_soc_write(codec, SSM2604_PWR, reg);
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ /* everything off except vref/vmid, */
+ snd_soc_write(codec, SSM2604_PWR, reg | PWR_CLK_OUT_PDN);
+ break;
+ case SND_SOC_BIAS_OFF:
+ /* everything off, dac mute, inactive */
+ snd_soc_write(codec, SSM2604_ACTIVE, 0);
+ snd_soc_write(codec, SSM2604_PWR, 0xffff);
+ break;
+
+ }
+ codec->bias_level = level;
+ return 0;
+}
+
+#define SSM2604_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_32000 |\
+ SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
+ SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
+
+#define SSM2604_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 ssm2604_dai_ops = {
+ .startup = ssm2604_startup,
+ .prepare = ssm2604_pcm_prepare,
+ .hw_params = ssm2604_hw_params,
+ .shutdown = ssm2604_shutdown,
+ .digital_mute = ssm2604_mute,
+ .set_sysclk = ssm2604_set_dai_sysclk,
+ .set_fmt = ssm2604_set_dai_fmt,
+};
+
+struct snd_soc_dai ssm2604_dai = {
+ .name = "SSM2604",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SSM2604_RATES,
+ .formats = SSM2604_FORMATS,},
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SSM2604_RATES,
+ .formats = SSM2604_FORMATS,},
+ .ops = &ssm2604_dai_ops,
+};
+EXPORT_SYMBOL_GPL(ssm2604_dai);
+
+static int ssm2604_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;
+
+ ssm2604_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ return 0;
+}
+
+static int ssm2604_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(ssm2604_reg); i++) {
+ data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
+ data[1] = cache[i] & 0x00ff;
+ codec->hw_write(codec->control_data, data, 2);
+ }
+ ssm2604_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ ssm2604_set_bias_level(codec, codec->suspend_bias_level);
+ return 0;
+}
+
+static int ssm2604_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec;
+ int reg, ret = 0;
+
+ socdev->card->codec = ssm2604_codec;
+ codec = ssm2604_codec;
+
+ ssm2604_reset(codec);
+
+ /* register pcms */
+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+ if (ret < 0) {
+ dev_err(codec->dev, "ssm2604: failed to create pcms\n");
+ goto pcm_err;
+ }
+ /*power on device*/
+ snd_soc_write(codec, SSM2604_ACTIVE, 0);
+ /* set the update bits */
+ reg = snd_soc_read(codec, SSM2604_LINVOL);
+ snd_soc_write(codec, SSM2604_LINVOL, reg | LINVOL_LRIN_BOTH);
+ reg = snd_soc_read(codec, SSM2604_RINVOL);
+ snd_soc_write(codec, SSM2604_RINVOL, reg | RINVOL_RLIN_BOTH);
+
+ snd_soc_write(codec, SSM2604_APANA, APANA_SELECT_DAC);
+ snd_soc_write(codec, SSM2604_PWR, 0);
+
+ snd_soc_add_controls(codec, ssm2604_snd_controls,
+ ARRAY_SIZE(ssm2604_snd_controls));
+ ssm2604_add_widgets(codec);
+
+ return ret;
+
+pcm_err:
+ return ret;
+}
+
+/* remove everything here */
+static int ssm2604_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_ssm2604 = {
+ .probe = ssm2604_probe,
+ .remove = ssm2604_remove,
+ .suspend = ssm2604_suspend,
+ .resume = ssm2604_resume,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2604);
+
+static int ssm2604_register(struct ssm2604_priv *ssm2604, enum snd_soc_control_type control)
+{
+ struct snd_soc_codec *codec = &ssm2604->codec;
+ int ret = 0;
+
+ mutex_init(&codec->mutex);
+ INIT_LIST_HEAD(&codec->dapm_widgets);
+ INIT_LIST_HEAD(&codec->dapm_paths);
+ codec->name = "SSM2604";
+ codec->owner = THIS_MODULE;
+ codec->bias_level = SND_SOC_BIAS_OFF;
+ codec->set_bias_level = ssm2604_set_bias_level;
+ codec->dai = &ssm2604_dai;
+ codec->num_dai = 1;
+ codec->reg_cache_size = sizeof(ssm2604_reg);
+ codec->reg_cache = kmemdup(ssm2604_reg, sizeof(ssm2604_reg),
+ GFP_KERNEL);
+ if (codec->reg_cache == NULL)
+ return -ENOMEM;
+
+ ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_register_codec(codec);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to register codec: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_register_dai(&ssm2604_dai);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
+ snd_soc_unregister_codec(codec);
+ return ret;
+ }
+
+ return ret;
+}
+
+static void ssm2604_unregister(struct ssm2604_priv *ssm2604)
+{
+ struct snd_soc_codec *codec = &ssm2604->codec;
+
+ ssm2604_set_bias_level(&ssm2604->codec, SND_SOC_BIAS_OFF);
+ kfree(codec->reg_cache);
+ snd_soc_unregister_dai(&ssm2604_dai);
+ snd_soc_unregister_codec(&ssm2604->codec);
+ kfree(ssm2604);
+ ssm2604_codec = NULL;
+}
+
+static int ssm2604_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct ssm2604_priv *ssm2604;
+ struct snd_soc_codec *codec;
+
+ ssm2604 = kzalloc(sizeof(struct ssm2604_priv), GFP_KERNEL);
+ if (ssm2604 == NULL)
+ return -ENOMEM;
+ codec = &ssm2604->codec;
+ codec->private_data = ssm2604;
+
+ i2c_set_clientdata(i2c, ssm2604);
+ codec->control_data = i2c;
+
+ codec->dev = &i2c->dev;
+ ssm2604_codec = codec;
+
+ return ssm2604_register(ssm2604, SND_SOC_I2C);
+}
+
+static __devexit int ssm2604_i2c_remove(struct i2c_client *client)
+{
+ struct ssm2604_priv *ssm2604 = i2c_get_clientdata(client);
+ ssm2604_unregister(ssm2604);
+ return 0;
+}
+
+static const struct i2c_device_id ssm2604_i2c_id[] = {
+ { "ssm2604", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ssm2604_i2c_id);
+
+/* corgi i2c codec control layer */
+static struct i2c_driver ssm2604_i2c_driver = {
+ .driver = {
+ .name = "ssm2604",
+ .owner = THIS_MODULE,
+ },
+ .probe = ssm2604_i2c_probe,
+ .remove = __devexit_p(ssm2604_i2c_remove),
+ .id_table = ssm2604_i2c_id,
+};
+
+static int __init ssm2604_modinit(void)
+{
+ int ret;
+
+ ret = i2c_add_driver(&ssm2604_i2c_driver);
+ if (ret != 0) {
+ printk(KERN_ERR "Failed to register ssm2604 I2C driver: %d\n",
+ ret);
+ }
+
+ return ret;
+}
+module_init(ssm2604_modinit);
+
+static void __exit ssm2604_exit(void)
+{
+ i2c_del_driver(&ssm2604_i2c_driver);
+}
+module_exit(ssm2604_exit);
+
+MODULE_DESCRIPTION("ASoC SSM2604 driver");
+MODULE_AUTHOR("Cliff Cai");
+MODULE_LICENSE("GPL");
