sound/soc/codecs/sirf-audio-codec.c - maze/linux - Git at Google

 /*
  * SiRF audio codec driver
  *
  * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
  *
  * Licensed under GPLv2 or later.
  */

 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/regmap.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/initval.h>
 #include <sound/tlv.h>
 #include <sound/soc.h>
 #include <sound/dmaengine_pcm.h>

 #include "sirf-audio-codec.h"

 struct sirf_audio_codec {
 	struct clk *clk;
 	struct regmap *regmap;
 	u32 reg_ctrl0, reg_ctrl1;
 };

 static const char * const input_mode_mux[] = {"Single-ended",
 	"Differential"};

 static const struct soc_enum input_mode_mux_enum =
 	SOC_ENUM_SINGLE(AUDIO_IC_CODEC_CTRL1, 4, 2, input_mode_mux);

 static const struct snd_kcontrol_new sirf_audio_codec_input_mode_control =
 	SOC_DAPM_ENUM("Route", input_mode_mux_enum);

 static const DECLARE_TLV_DB_SCALE(playback_vol_tlv, -12400, 100, 0);
 static const DECLARE_TLV_DB_SCALE(capture_vol_tlv_prima2, 500, 100, 0);
 static const DECLARE_TLV_DB_RANGE(capture_vol_tlv_atlas6,
 	0, 7, TLV_DB_SCALE_ITEM(-100, 100, 0),
 	0x22, 0x3F, TLV_DB_SCALE_ITEM(700, 100, 0),
 );

 static struct snd_kcontrol_new volume_controls_atlas6[] = {
 	SOC_DOUBLE_TLV("Playback Volume", AUDIO_IC_CODEC_CTRL0, 21, 14,
 			0x7F, 0, playback_vol_tlv),
 	SOC_DOUBLE_TLV("Capture Volume", AUDIO_IC_CODEC_CTRL1, 16, 10,
 			0x3F, 0, capture_vol_tlv_atlas6),
 };

 static struct snd_kcontrol_new volume_controls_prima2[] = {
 	SOC_DOUBLE_TLV("Speaker Volume", AUDIO_IC_CODEC_CTRL0, 21, 14,
 			0x7F, 0, playback_vol_tlv),
 	SOC_DOUBLE_TLV("Capture Volume", AUDIO_IC_CODEC_CTRL1, 15, 10,
 			0x1F, 0, capture_vol_tlv_prima2),
 };

 static struct snd_kcontrol_new left_input_path_controls[] = {
 	SOC_DAPM_SINGLE("Line Left Switch", AUDIO_IC_CODEC_CTRL1, 6, 1, 0),
 	SOC_DAPM_SINGLE("Mic Left Switch", AUDIO_IC_CODEC_CTRL1, 3, 1, 0),
 };

 static struct snd_kcontrol_new right_input_path_controls[] = {
 	SOC_DAPM_SINGLE("Line Right Switch", AUDIO_IC_CODEC_CTRL1, 5, 1, 0),
 	SOC_DAPM_SINGLE("Mic Right Switch", AUDIO_IC_CODEC_CTRL1, 2, 1, 0),
 };

 static struct snd_kcontrol_new left_dac_to_hp_left_amp_switch_control =
 	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 9, 1, 0);

 static struct snd_kcontrol_new left_dac_to_hp_right_amp_switch_control =
 	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 8, 1, 0);

 static struct snd_kcontrol_new right_dac_to_hp_left_amp_switch_control =
 	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 7, 1, 0);

 static struct snd_kcontrol_new right_dac_to_hp_right_amp_switch_control =
 	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 6, 1, 0);

 static struct snd_kcontrol_new left_dac_to_speaker_lineout_switch_control =
 	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 11, 1, 0);

 static struct snd_kcontrol_new right_dac_to_speaker_lineout_switch_control =
 	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 10, 1, 0);

 /* After enable adc, Delay 200ms to avoid pop noise */
 static int adc_enable_delay_event(struct snd_soc_dapm_widget *w,
 		struct snd_kcontrol *kcontrol, int event)
 {
 	switch (event) {
 	case SND_SOC_DAPM_POST_PMU:
 		msleep(200);
 		break;
 	default:
 		break;
 	}

 	return 0;
 }

 static void enable_and_reset_codec(struct regmap *regmap,
 		u32 codec_enable_bits, u32 codec_reset_bits)
 {
 	regmap_update_bits(regmap, AUDIO_IC_CODEC_CTRL1,
 			codec_enable_bits | codec_reset_bits,
 			codec_enable_bits | ~codec_reset_bits);
 	msleep(20);
 	regmap_update_bits(regmap, AUDIO_IC_CODEC_CTRL1,
 			codec_reset_bits, codec_reset_bits);
 }

 static int atlas6_codec_enable_and_reset_event(struct snd_soc_dapm_widget *w,
 		struct snd_kcontrol *kcontrol, int event)
 {
 #define ATLAS6_CODEC_ENABLE_BITS (1 << 29)
 #define ATLAS6_CODEC_RESET_BITS (1 << 28)
 	struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(w->codec->dev);
 	switch (event) {
 	case SND_SOC_DAPM_PRE_PMU:
 		enable_and_reset_codec(sirf_audio_codec->regmap,
 			ATLAS6_CODEC_ENABLE_BITS, ATLAS6_CODEC_RESET_BITS);
 		break;
 	case SND_SOC_DAPM_POST_PMD:
 		regmap_update_bits(sirf_audio_codec->regmap,
 			AUDIO_IC_CODEC_CTRL1, ATLAS6_CODEC_ENABLE_BITS,
 			~ATLAS6_CODEC_ENABLE_BITS);
 		break;
 	default:
 		break;
 	}

 	return 0;
 }

 static int prima2_codec_enable_and_reset_event(struct snd_soc_dapm_widget *w,
 		struct snd_kcontrol *kcontrol, int event)
 {
 #define PRIMA2_CODEC_ENABLE_BITS (1 << 27)
 #define PRIMA2_CODEC_RESET_BITS (1 << 26)
 	struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(w->codec->dev);
 	switch (event) {
 	case SND_SOC_DAPM_POST_PMU:
 		enable_and_reset_codec(sirf_audio_codec->regmap,
 			PRIMA2_CODEC_ENABLE_BITS, PRIMA2_CODEC_RESET_BITS);
 		break;
 	case SND_SOC_DAPM_POST_PMD:
 		regmap_update_bits(sirf_audio_codec->regmap,
 			AUDIO_IC_CODEC_CTRL1, PRIMA2_CODEC_ENABLE_BITS,
 			~PRIMA2_CODEC_ENABLE_BITS);
 		break;
 	default:
 		break;
 	}

 	return 0;
 }

 static const struct snd_soc_dapm_widget atlas6_output_driver_dapm_widgets[] = {
 	SND_SOC_DAPM_OUT_DRV("HP Left Driver", AUDIO_IC_CODEC_CTRL1,
 			25, 0, NULL, 0),
 	SND_SOC_DAPM_OUT_DRV("HP Right Driver", AUDIO_IC_CODEC_CTRL1,
 			26, 0, NULL, 0),
 	SND_SOC_DAPM_OUT_DRV("Speaker Driver", AUDIO_IC_CODEC_CTRL1,
 			27, 0, NULL, 0),
 };

 static const struct snd_soc_dapm_widget prima2_output_driver_dapm_widgets[] = {
 	SND_SOC_DAPM_OUT_DRV("HP Left Driver", AUDIO_IC_CODEC_CTRL1,
 			23, 0, NULL, 0),
 	SND_SOC_DAPM_OUT_DRV("HP Right Driver", AUDIO_IC_CODEC_CTRL1,
 			24, 0, NULL, 0),
 	SND_SOC_DAPM_OUT_DRV("Speaker Driver", AUDIO_IC_CODEC_CTRL1,
 			25, 0, NULL, 0),
 };

 static const struct snd_soc_dapm_widget atlas6_codec_clock_dapm_widget =
 	SND_SOC_DAPM_SUPPLY("codecclk", SND_SOC_NOPM, 0, 0,
 			atlas6_codec_enable_and_reset_event,
 			SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD);

 static const struct snd_soc_dapm_widget prima2_codec_clock_dapm_widget =
 	SND_SOC_DAPM_SUPPLY("codecclk", SND_SOC_NOPM, 0, 0,
 			prima2_codec_enable_and_reset_event,
 			SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD);

 static const struct snd_soc_dapm_widget sirf_audio_codec_dapm_widgets[] = {
 	SND_SOC_DAPM_DAC("DAC left", NULL, AUDIO_IC_CODEC_CTRL0, 1, 0),
 	SND_SOC_DAPM_DAC("DAC right", NULL, AUDIO_IC_CODEC_CTRL0, 0, 0),
 	SND_SOC_DAPM_SWITCH("Left dac to hp left amp", SND_SOC_NOPM, 0, 0,
 			&left_dac_to_hp_left_amp_switch_control),
 	SND_SOC_DAPM_SWITCH("Left dac to hp right amp", SND_SOC_NOPM, 0, 0,
 			&left_dac_to_hp_right_amp_switch_control),
 	SND_SOC_DAPM_SWITCH("Right dac to hp left amp", SND_SOC_NOPM, 0, 0,
 			&right_dac_to_hp_left_amp_switch_control),
 	SND_SOC_DAPM_SWITCH("Right dac to hp right amp", SND_SOC_NOPM, 0, 0,
 			&right_dac_to_hp_right_amp_switch_control),
 	SND_SOC_DAPM_OUT_DRV("HP amp left driver", AUDIO_IC_CODEC_CTRL0, 3, 0,
 			NULL, 0),
 	SND_SOC_DAPM_OUT_DRV("HP amp right driver", AUDIO_IC_CODEC_CTRL0, 3, 0,
 			NULL, 0),

 	SND_SOC_DAPM_SWITCH("Left dac to speaker lineout", SND_SOC_NOPM, 0, 0,
 			&left_dac_to_speaker_lineout_switch_control),
 	SND_SOC_DAPM_SWITCH("Right dac to speaker lineout", SND_SOC_NOPM, 0, 0,
 			&right_dac_to_speaker_lineout_switch_control),
 	SND_SOC_DAPM_OUT_DRV("Speaker amp driver", AUDIO_IC_CODEC_CTRL0, 4, 0,
 			NULL, 0),

 	SND_SOC_DAPM_OUTPUT("HPOUTL"),
 	SND_SOC_DAPM_OUTPUT("HPOUTR"),
 	SND_SOC_DAPM_OUTPUT("SPKOUT"),

 	SND_SOC_DAPM_ADC_E("ADC left", NULL, AUDIO_IC_CODEC_CTRL1, 8, 0,
 			adc_enable_delay_event, SND_SOC_DAPM_POST_PMU),
 	SND_SOC_DAPM_ADC_E("ADC right", NULL, AUDIO_IC_CODEC_CTRL1, 7, 0,
 			adc_enable_delay_event, SND_SOC_DAPM_POST_PMU),
 	SND_SOC_DAPM_MIXER("Left PGA mixer", AUDIO_IC_CODEC_CTRL1, 1, 0,
 		&left_input_path_controls[0],
 		ARRAY_SIZE(left_input_path_controls)),
 	SND_SOC_DAPM_MIXER("Right PGA mixer", AUDIO_IC_CODEC_CTRL1, 0, 0,
 		&right_input_path_controls[0],
 		ARRAY_SIZE(right_input_path_controls)),

 	SND_SOC_DAPM_MUX("Mic input mode mux", SND_SOC_NOPM, 0, 0,
 			&sirf_audio_codec_input_mode_control),
 	SND_SOC_DAPM_MICBIAS("Mic Bias", AUDIO_IC_CODEC_PWR, 3, 0),
 	SND_SOC_DAPM_INPUT("MICIN1"),
 	SND_SOC_DAPM_INPUT("MICIN2"),
 	SND_SOC_DAPM_INPUT("LINEIN1"),
 	SND_SOC_DAPM_INPUT("LINEIN2"),

 	SND_SOC_DAPM_SUPPLY("HSL Phase Opposite", AUDIO_IC_CODEC_CTRL0,
 			30, 0, NULL, 0),
 };

 static const struct snd_soc_dapm_route sirf_audio_codec_map[] = {
 	{"SPKOUT", NULL, "Speaker Driver"},
 	{"Speaker Driver", NULL, "Speaker amp driver"},
 	{"Speaker amp driver", NULL, "Left dac to speaker lineout"},
 	{"Speaker amp driver", NULL, "Right dac to speaker lineout"},
 	{"Left dac to speaker lineout", "Switch", "DAC left"},
 	{"Right dac to speaker lineout", "Switch", "DAC right"},
 	{"HPOUTL", NULL, "HP Left Driver"},
 	{"HPOUTR", NULL, "HP Right Driver"},
 	{"HP Left Driver", NULL, "HP amp left driver"},
 	{"HP Right Driver", NULL, "HP amp right driver"},
 	{"HP amp left driver", NULL, "Right dac to hp left amp"},
 	{"HP amp right driver", NULL , "Right dac to hp right amp"},
 	{"HP amp left driver", NULL, "Left dac to hp left amp"},
 	{"HP amp right driver", NULL , "Right dac to hp right amp"},
 	{"Right dac to hp left amp", "Switch", "DAC left"},
 	{"Right dac to hp right amp", "Switch", "DAC right"},
 	{"Left dac to hp left amp", "Switch", "DAC left"},
 	{"Left dac to hp right amp", "Switch", "DAC right"},
 	{"DAC left", NULL, "codecclk"},
 	{"DAC right", NULL, "codecclk"},
 	{"DAC left", NULL, "Playback"},
 	{"DAC right", NULL, "Playback"},
 	{"DAC left", NULL, "HSL Phase Opposite"},
 	{"DAC right", NULL, "HSL Phase Opposite"},

 	{"Capture", NULL, "ADC left"},
 	{"Capture", NULL, "ADC right"},
 	{"ADC left", NULL, "codecclk"},
 	{"ADC right", NULL, "codecclk"},
 	{"ADC left", NULL, "Left PGA mixer"},
 	{"ADC right", NULL, "Right PGA mixer"},
 	{"Left PGA mixer", "Line Left Switch", "LINEIN2"},
 	{"Right PGA mixer", "Line Right Switch", "LINEIN1"},
 	{"Left PGA mixer", "Mic Left Switch", "MICIN2"},
 	{"Right PGA mixer", "Mic Right Switch", "Mic input mode mux"},
 	{"Mic input mode mux", "Single-ended", "MICIN1"},
 	{"Mic input mode mux", "Differential", "MICIN1"},
 };

 static int sirf_audio_codec_trigger(struct snd_pcm_substream *substream,
 		int cmd,
 		struct snd_soc_dai *dai)
 {
 	int playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 	struct snd_soc_codec *codec = dai->codec;
 	u32 val = 0;

 	/*
 	 * This is a workaround, When stop playback,
 	 * need disable HP amp, avoid the current noise.
 	 */
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		break;
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		if (playback)
 			val = IC_HSLEN | IC_HSREN;
 		break;
 	default:
 		return -EINVAL;
 	}

 	if (playback)
 		snd_soc_update_bits(codec, AUDIO_IC_CODEC_CTRL0,
 			IC_HSLEN | IC_HSREN, val);
 	return 0;
 }

 struct snd_soc_dai_ops sirf_audio_codec_dai_ops = {
 	.trigger = sirf_audio_codec_trigger,
 };

 struct snd_soc_dai_driver sirf_audio_codec_dai = {
 	.name = "sirf-audio-codec",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_48000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE,
 	},
 	.capture = {
 		.stream_name = "Capture",
 		.channels_min = 1,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_48000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE,
 	},
 	.ops = &sirf_audio_codec_dai_ops,
 };

 static int sirf_audio_codec_probe(struct snd_soc_codec *codec)
 {
 	struct snd_soc_dapm_context *dapm = &codec->dapm;

 	pm_runtime_enable(codec->dev);

 	if (of_device_is_compatible(codec->dev->of_node, "sirf,prima2-audio-codec")) {
 		snd_soc_dapm_new_controls(dapm,
 			prima2_output_driver_dapm_widgets,
 			ARRAY_SIZE(prima2_output_driver_dapm_widgets));
 		snd_soc_dapm_new_controls(dapm,
 			&prima2_codec_clock_dapm_widget, 1);
 		return snd_soc_add_codec_controls(codec,
 			volume_controls_prima2,
 			ARRAY_SIZE(volume_controls_prima2));
 	}
 	if (of_device_is_compatible(codec->dev->of_node, "sirf,atlas6-audio-codec")) {
 		snd_soc_dapm_new_controls(dapm,
 			atlas6_output_driver_dapm_widgets,
 			ARRAY_SIZE(atlas6_output_driver_dapm_widgets));
 		snd_soc_dapm_new_controls(dapm,
 			&atlas6_codec_clock_dapm_widget, 1);
 		return snd_soc_add_codec_controls(codec,
 			volume_controls_atlas6,
 			ARRAY_SIZE(volume_controls_atlas6));
 	}

 	return -EINVAL;
 }

 static int sirf_audio_codec_remove(struct snd_soc_codec *codec)
 {
 	pm_runtime_disable(codec->dev);
 	return 0;
 }

 static struct snd_soc_codec_driver soc_codec_device_sirf_audio_codec = {
 	.probe = sirf_audio_codec_probe,
 	.remove = sirf_audio_codec_remove,
 	.dapm_widgets = sirf_audio_codec_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(sirf_audio_codec_dapm_widgets),
 	.dapm_routes = sirf_audio_codec_map,
 	.num_dapm_routes = ARRAY_SIZE(sirf_audio_codec_map),
 	.idle_bias_off = true,
 };

 static const struct of_device_id sirf_audio_codec_of_match[] = {
 	{ .compatible = "sirf,prima2-audio-codec" },
 	{ .compatible = "sirf,atlas6-audio-codec" },
 	{}
 };
 MODULE_DEVICE_TABLE(of, sirf_audio_codec_of_match);

 static const struct regmap_config sirf_audio_codec_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
 	.max_register = AUDIO_IC_CODEC_CTRL3,
 	.cache_type = REGCACHE_NONE,
 };

 static int sirf_audio_codec_driver_probe(struct platform_device *pdev)
 {
 	int ret;
 	struct sirf_audio_codec *sirf_audio_codec;
 	void __iomem *base;
 	struct resource *mem_res;
 	const struct of_device_id *match;

 	match = of_match_node(sirf_audio_codec_of_match, pdev->dev.of_node);

 	sirf_audio_codec = devm_kzalloc(&pdev->dev,
 		sizeof(struct sirf_audio_codec), GFP_KERNEL);
 	if (!sirf_audio_codec)
 		return -ENOMEM;

 	platform_set_drvdata(pdev, sirf_audio_codec);

 	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	base = devm_ioremap_resource(&pdev->dev, mem_res);
 	if (base == NULL)
 		return -ENOMEM;

 	sirf_audio_codec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
 					    &sirf_audio_codec_regmap_config);
 	if (IS_ERR(sirf_audio_codec->regmap))
 		return PTR_ERR(sirf_audio_codec->regmap);

 	sirf_audio_codec->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(sirf_audio_codec->clk)) {
 		dev_err(&pdev->dev, "Get clock failed.\n");
 		return PTR_ERR(sirf_audio_codec->clk);
 	}

 	ret = clk_prepare_enable(sirf_audio_codec->clk);
 	if (ret) {
 		dev_err(&pdev->dev, "Enable clock failed.\n");
 		return ret;
 	}

 	ret = snd_soc_register_codec(&(pdev->dev),
 			&soc_codec_device_sirf_audio_codec,
 			&sirf_audio_codec_dai, 1);
 	if (ret) {
 		dev_err(&pdev->dev, "Register Audio Codec dai failed.\n");
 		goto err_clk_put;
 	}

 	/*
 	 * Always open charge pump, if not, when the charge pump closed the
 	 * adc will not stable
 	 */
 	regmap_update_bits(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL0,
 		IC_CPFREQ, IC_CPFREQ);

 	if (of_device_is_compatible(pdev->dev.of_node, "sirf,atlas6-audio-codec"))
 		regmap_update_bits(sirf_audio_codec->regmap,
 				AUDIO_IC_CODEC_CTRL0, IC_CPEN, IC_CPEN);
 	return 0;

 err_clk_put:
 	clk_disable_unprepare(sirf_audio_codec->clk);
 	return ret;
 }

 static int sirf_audio_codec_driver_remove(struct platform_device *pdev)
 {
 	struct sirf_audio_codec *sirf_audio_codec = platform_get_drvdata(pdev);

 	clk_disable_unprepare(sirf_audio_codec->clk);
 	snd_soc_unregister_codec(&(pdev->dev));

 	return 0;
 }

 #ifdef CONFIG_PM_SLEEP
 static int sirf_audio_codec_suspend(struct device *dev)
 {
 	struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(dev);

 	regmap_read(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL0,
 		&sirf_audio_codec->reg_ctrl0);
 	regmap_read(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL1,
 		&sirf_audio_codec->reg_ctrl1);
 	clk_disable_unprepare(sirf_audio_codec->clk);

 	return 0;
 }

 static int sirf_audio_codec_resume(struct device *dev)
 {
 	struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(dev);
 	int ret;

 	ret = clk_prepare_enable(sirf_audio_codec->clk);
 	if (ret)
 		return ret;

 	regmap_write(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL0,
 		sirf_audio_codec->reg_ctrl0);
 	regmap_write(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL1,
 		sirf_audio_codec->reg_ctrl1);

 	return 0;
 }
 #endif

 static const struct dev_pm_ops sirf_audio_codec_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(sirf_audio_codec_suspend, sirf_audio_codec_resume)
 };

 static struct platform_driver sirf_audio_codec_driver = {
 	.driver = {
 		.name = "sirf-audio-codec",
 		.owner = THIS_MODULE,
 		.of_match_table = sirf_audio_codec_of_match,
 		.pm = &sirf_audio_codec_pm_ops,
 	},
 	.probe = sirf_audio_codec_driver_probe,
 	.remove = sirf_audio_codec_driver_remove,
 };

 module_platform_driver(sirf_audio_codec_driver);

 MODULE_DESCRIPTION("SiRF audio codec driver");
 MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
 MODULE_LICENSE("GPL v2");
	/*
	* SiRF audio codec driver
	*
	* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
	*
	* Licensed under GPLv2 or later.
	*/

	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/pm_runtime.h>
	#include <linux/of.h>
	#include <linux/of_device.h>
	#include <linux/clk.h>
	#include <linux/delay.h>
	#include <linux/io.h>
	#include <linux/regmap.h>
	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/initval.h>
	#include <sound/tlv.h>
	#include <sound/soc.h>
	#include <sound/dmaengine_pcm.h>

	#include "sirf-audio-codec.h"

	struct sirf_audio_codec {
	struct clk *clk;
	struct regmap *regmap;
	u32 reg_ctrl0, reg_ctrl1;
	};

	static const char * const input_mode_mux[] = {"Single-ended",
	"Differential"};

	static const struct soc_enum input_mode_mux_enum =
	SOC_ENUM_SINGLE(AUDIO_IC_CODEC_CTRL1, 4, 2, input_mode_mux);

	static const struct snd_kcontrol_new sirf_audio_codec_input_mode_control =
	SOC_DAPM_ENUM("Route", input_mode_mux_enum);

	static const DECLARE_TLV_DB_SCALE(playback_vol_tlv, -12400, 100, 0);
	static const DECLARE_TLV_DB_SCALE(capture_vol_tlv_prima2, 500, 100, 0);
	static const DECLARE_TLV_DB_RANGE(capture_vol_tlv_atlas6,
	0, 7, TLV_DB_SCALE_ITEM(-100, 100, 0),
	0x22, 0x3F, TLV_DB_SCALE_ITEM(700, 100, 0),
	);

	static struct snd_kcontrol_new volume_controls_atlas6[] = {
	SOC_DOUBLE_TLV("Playback Volume", AUDIO_IC_CODEC_CTRL0, 21, 14,
	0x7F, 0, playback_vol_tlv),
	SOC_DOUBLE_TLV("Capture Volume", AUDIO_IC_CODEC_CTRL1, 16, 10,
	0x3F, 0, capture_vol_tlv_atlas6),
	};

	static struct snd_kcontrol_new volume_controls_prima2[] = {
	SOC_DOUBLE_TLV("Speaker Volume", AUDIO_IC_CODEC_CTRL0, 21, 14,
	0x7F, 0, playback_vol_tlv),
	SOC_DOUBLE_TLV("Capture Volume", AUDIO_IC_CODEC_CTRL1, 15, 10,
	0x1F, 0, capture_vol_tlv_prima2),
	};

	static struct snd_kcontrol_new left_input_path_controls[] = {
	SOC_DAPM_SINGLE("Line Left Switch", AUDIO_IC_CODEC_CTRL1, 6, 1, 0),
	SOC_DAPM_SINGLE("Mic Left Switch", AUDIO_IC_CODEC_CTRL1, 3, 1, 0),
	};

	static struct snd_kcontrol_new right_input_path_controls[] = {
	SOC_DAPM_SINGLE("Line Right Switch", AUDIO_IC_CODEC_CTRL1, 5, 1, 0),
	SOC_DAPM_SINGLE("Mic Right Switch", AUDIO_IC_CODEC_CTRL1, 2, 1, 0),
	};

	static struct snd_kcontrol_new left_dac_to_hp_left_amp_switch_control =
	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 9, 1, 0);

	static struct snd_kcontrol_new left_dac_to_hp_right_amp_switch_control =
	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 8, 1, 0);

	static struct snd_kcontrol_new right_dac_to_hp_left_amp_switch_control =
	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 7, 1, 0);

	static struct snd_kcontrol_new right_dac_to_hp_right_amp_switch_control =
	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 6, 1, 0);

	static struct snd_kcontrol_new left_dac_to_speaker_lineout_switch_control =
	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 11, 1, 0);

	static struct snd_kcontrol_new right_dac_to_speaker_lineout_switch_control =
	SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 10, 1, 0);

	/* After enable adc, Delay 200ms to avoid pop noise */
	static int adc_enable_delay_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event)
	{
	switch (event) {
	case SND_SOC_DAPM_POST_PMU:
	msleep(200);
	break;
	default:
	break;
	}

	return 0;
	}

	static void enable_and_reset_codec(struct regmap *regmap,
	u32 codec_enable_bits, u32 codec_reset_bits)
	{
	regmap_update_bits(regmap, AUDIO_IC_CODEC_CTRL1,
	codec_enable_bits \| codec_reset_bits,
	codec_enable_bits \| ~codec_reset_bits);
	msleep(20);
	regmap_update_bits(regmap, AUDIO_IC_CODEC_CTRL1,
	codec_reset_bits, codec_reset_bits);
	}

	static int atlas6_codec_enable_and_reset_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event)
	{
	#define ATLAS6_CODEC_ENABLE_BITS (1 << 29)
	#define ATLAS6_CODEC_RESET_BITS (1 << 28)
	struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(w->codec->dev);
	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
	enable_and_reset_codec(sirf_audio_codec->regmap,
	ATLAS6_CODEC_ENABLE_BITS, ATLAS6_CODEC_RESET_BITS);
	break;
	case SND_SOC_DAPM_POST_PMD:
	regmap_update_bits(sirf_audio_codec->regmap,
	AUDIO_IC_CODEC_CTRL1, ATLAS6_CODEC_ENABLE_BITS,
	~ATLAS6_CODEC_ENABLE_BITS);
	break;
	default:
	break;
	}

	return 0;
	}

	static int prima2_codec_enable_and_reset_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event)
	{
	#define PRIMA2_CODEC_ENABLE_BITS (1 << 27)
	#define PRIMA2_CODEC_RESET_BITS (1 << 26)
	struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(w->codec->dev);
	switch (event) {
	case SND_SOC_DAPM_POST_PMU:
	enable_and_reset_codec(sirf_audio_codec->regmap,
	PRIMA2_CODEC_ENABLE_BITS, PRIMA2_CODEC_RESET_BITS);
	break;
	case SND_SOC_DAPM_POST_PMD:
	regmap_update_bits(sirf_audio_codec->regmap,
	AUDIO_IC_CODEC_CTRL1, PRIMA2_CODEC_ENABLE_BITS,
	~PRIMA2_CODEC_ENABLE_BITS);
	break;
	default:
	break;
	}

	return 0;
	}

	static const struct snd_soc_dapm_widget atlas6_output_driver_dapm_widgets[] = {
	SND_SOC_DAPM_OUT_DRV("HP Left Driver", AUDIO_IC_CODEC_CTRL1,
	25, 0, NULL, 0),
	SND_SOC_DAPM_OUT_DRV("HP Right Driver", AUDIO_IC_CODEC_CTRL1,
	26, 0, NULL, 0),
	SND_SOC_DAPM_OUT_DRV("Speaker Driver", AUDIO_IC_CODEC_CTRL1,
	27, 0, NULL, 0),
	};

	static const struct snd_soc_dapm_widget prima2_output_driver_dapm_widgets[] = {
	SND_SOC_DAPM_OUT_DRV("HP Left Driver", AUDIO_IC_CODEC_CTRL1,
	23, 0, NULL, 0),
	SND_SOC_DAPM_OUT_DRV("HP Right Driver", AUDIO_IC_CODEC_CTRL1,
	24, 0, NULL, 0),
	SND_SOC_DAPM_OUT_DRV("Speaker Driver", AUDIO_IC_CODEC_CTRL1,
	25, 0, NULL, 0),
	};

	static const struct snd_soc_dapm_widget atlas6_codec_clock_dapm_widget =
	SND_SOC_DAPM_SUPPLY("codecclk", SND_SOC_NOPM, 0, 0,
	atlas6_codec_enable_and_reset_event,
	SND_SOC_DAPM_PRE_PMU \| SND_SOC_DAPM_POST_PMD);

	static const struct snd_soc_dapm_widget prima2_codec_clock_dapm_widget =
	SND_SOC_DAPM_SUPPLY("codecclk", SND_SOC_NOPM, 0, 0,
	prima2_codec_enable_and_reset_event,
	SND_SOC_DAPM_PRE_PMU \| SND_SOC_DAPM_POST_PMD);

	static const struct snd_soc_dapm_widget sirf_audio_codec_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("DAC left", NULL, AUDIO_IC_CODEC_CTRL0, 1, 0),
	SND_SOC_DAPM_DAC("DAC right", NULL, AUDIO_IC_CODEC_CTRL0, 0, 0),
	SND_SOC_DAPM_SWITCH("Left dac to hp left amp", SND_SOC_NOPM, 0, 0,
	&left_dac_to_hp_left_amp_switch_control),
	SND_SOC_DAPM_SWITCH("Left dac to hp right amp", SND_SOC_NOPM, 0, 0,
	&left_dac_to_hp_right_amp_switch_control),
	SND_SOC_DAPM_SWITCH("Right dac to hp left amp", SND_SOC_NOPM, 0, 0,
	&right_dac_to_hp_left_amp_switch_control),
	SND_SOC_DAPM_SWITCH("Right dac to hp right amp", SND_SOC_NOPM, 0, 0,
	&right_dac_to_hp_right_amp_switch_control),
	SND_SOC_DAPM_OUT_DRV("HP amp left driver", AUDIO_IC_CODEC_CTRL0, 3, 0,
	NULL, 0),
	SND_SOC_DAPM_OUT_DRV("HP amp right driver", AUDIO_IC_CODEC_CTRL0, 3, 0,
	NULL, 0),

	SND_SOC_DAPM_SWITCH("Left dac to speaker lineout", SND_SOC_NOPM, 0, 0,
	&left_dac_to_speaker_lineout_switch_control),
	SND_SOC_DAPM_SWITCH("Right dac to speaker lineout", SND_SOC_NOPM, 0, 0,
	&right_dac_to_speaker_lineout_switch_control),
	SND_SOC_DAPM_OUT_DRV("Speaker amp driver", AUDIO_IC_CODEC_CTRL0, 4, 0,
	NULL, 0),

	SND_SOC_DAPM_OUTPUT("HPOUTL"),
	SND_SOC_DAPM_OUTPUT("HPOUTR"),
	SND_SOC_DAPM_OUTPUT("SPKOUT"),

	SND_SOC_DAPM_ADC_E("ADC left", NULL, AUDIO_IC_CODEC_CTRL1, 8, 0,
	adc_enable_delay_event, SND_SOC_DAPM_POST_PMU),
	SND_SOC_DAPM_ADC_E("ADC right", NULL, AUDIO_IC_CODEC_CTRL1, 7, 0,
	adc_enable_delay_event, SND_SOC_DAPM_POST_PMU),
	SND_SOC_DAPM_MIXER("Left PGA mixer", AUDIO_IC_CODEC_CTRL1, 1, 0,
	&left_input_path_controls[0],
	ARRAY_SIZE(left_input_path_controls)),
	SND_SOC_DAPM_MIXER("Right PGA mixer", AUDIO_IC_CODEC_CTRL1, 0, 0,
	&right_input_path_controls[0],
	ARRAY_SIZE(right_input_path_controls)),

	SND_SOC_DAPM_MUX("Mic input mode mux", SND_SOC_NOPM, 0, 0,
	&sirf_audio_codec_input_mode_control),
	SND_SOC_DAPM_MICBIAS("Mic Bias", AUDIO_IC_CODEC_PWR, 3, 0),
	SND_SOC_DAPM_INPUT("MICIN1"),
	SND_SOC_DAPM_INPUT("MICIN2"),
	SND_SOC_DAPM_INPUT("LINEIN1"),
	SND_SOC_DAPM_INPUT("LINEIN2"),

	SND_SOC_DAPM_SUPPLY("HSL Phase Opposite", AUDIO_IC_CODEC_CTRL0,
	30, 0, NULL, 0),
	};

	static const struct snd_soc_dapm_route sirf_audio_codec_map[] = {
	{"SPKOUT", NULL, "Speaker Driver"},
	{"Speaker Driver", NULL, "Speaker amp driver"},
	{"Speaker amp driver", NULL, "Left dac to speaker lineout"},
	{"Speaker amp driver", NULL, "Right dac to speaker lineout"},
	{"Left dac to speaker lineout", "Switch", "DAC left"},
	{"Right dac to speaker lineout", "Switch", "DAC right"},
	{"HPOUTL", NULL, "HP Left Driver"},
	{"HPOUTR", NULL, "HP Right Driver"},
	{"HP Left Driver", NULL, "HP amp left driver"},
	{"HP Right Driver", NULL, "HP amp right driver"},
	{"HP amp left driver", NULL, "Right dac to hp left amp"},
	{"HP amp right driver", NULL , "Right dac to hp right amp"},
	{"HP amp left driver", NULL, "Left dac to hp left amp"},
	{"HP amp right driver", NULL , "Right dac to hp right amp"},
	{"Right dac to hp left amp", "Switch", "DAC left"},
	{"Right dac to hp right amp", "Switch", "DAC right"},
	{"Left dac to hp left amp", "Switch", "DAC left"},
	{"Left dac to hp right amp", "Switch", "DAC right"},
	{"DAC left", NULL, "codecclk"},
	{"DAC right", NULL, "codecclk"},
	{"DAC left", NULL, "Playback"},
	{"DAC right", NULL, "Playback"},
	{"DAC left", NULL, "HSL Phase Opposite"},
	{"DAC right", NULL, "HSL Phase Opposite"},

	{"Capture", NULL, "ADC left"},
	{"Capture", NULL, "ADC right"},
	{"ADC left", NULL, "codecclk"},
	{"ADC right", NULL, "codecclk"},
	{"ADC left", NULL, "Left PGA mixer"},
	{"ADC right", NULL, "Right PGA mixer"},
	{"Left PGA mixer", "Line Left Switch", "LINEIN2"},
	{"Right PGA mixer", "Line Right Switch", "LINEIN1"},
	{"Left PGA mixer", "Mic Left Switch", "MICIN2"},
	{"Right PGA mixer", "Mic Right Switch", "Mic input mode mux"},
	{"Mic input mode mux", "Single-ended", "MICIN1"},
	{"Mic input mode mux", "Differential", "MICIN1"},
	};

	static int sirf_audio_codec_trigger(struct snd_pcm_substream *substream,
	int cmd,
	struct snd_soc_dai *dai)
	{
	int playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	struct snd_soc_codec *codec = dai->codec;
	u32 val = 0;

	/*
	* This is a workaround, When stop playback,
	* need disable HP amp, avoid the current noise.
	*/
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	break;
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	if (playback)
	val = IC_HSLEN \| IC_HSREN;
	break;
	default:
	return -EINVAL;
	}

	if (playback)
	snd_soc_update_bits(codec, AUDIO_IC_CODEC_CTRL0,
	IC_HSLEN \| IC_HSREN, val);
	return 0;
	}

	struct snd_soc_dai_ops sirf_audio_codec_dai_ops = {
	.trigger = sirf_audio_codec_trigger,
	};

	struct snd_soc_dai_driver sirf_audio_codec_dai = {
	.name = "sirf-audio-codec",
	.playback = {
	.stream_name = "Playback",
	.channels_min = 2,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_48000,
	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
	.stream_name = "Capture",
	.channels_min = 1,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_48000,
	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.ops = &sirf_audio_codec_dai_ops,
	};

	static int sirf_audio_codec_probe(struct snd_soc_codec *codec)
	{
	struct snd_soc_dapm_context *dapm = &codec->dapm;

	pm_runtime_enable(codec->dev);

	if (of_device_is_compatible(codec->dev->of_node, "sirf,prima2-audio-codec")) {
	snd_soc_dapm_new_controls(dapm,
	prima2_output_driver_dapm_widgets,
	ARRAY_SIZE(prima2_output_driver_dapm_widgets));
	snd_soc_dapm_new_controls(dapm,
	&prima2_codec_clock_dapm_widget, 1);
	return snd_soc_add_codec_controls(codec,
	volume_controls_prima2,
	ARRAY_SIZE(volume_controls_prima2));
	}
	if (of_device_is_compatible(codec->dev->of_node, "sirf,atlas6-audio-codec")) {
	snd_soc_dapm_new_controls(dapm,
	atlas6_output_driver_dapm_widgets,
	ARRAY_SIZE(atlas6_output_driver_dapm_widgets));
	snd_soc_dapm_new_controls(dapm,
	&atlas6_codec_clock_dapm_widget, 1);
	return snd_soc_add_codec_controls(codec,
	volume_controls_atlas6,
	ARRAY_SIZE(volume_controls_atlas6));
	}

	return -EINVAL;
	}

	static int sirf_audio_codec_remove(struct snd_soc_codec *codec)
	{
	pm_runtime_disable(codec->dev);
	return 0;
	}

	static struct snd_soc_codec_driver soc_codec_device_sirf_audio_codec = {
	.probe = sirf_audio_codec_probe,
	.remove = sirf_audio_codec_remove,
	.dapm_widgets = sirf_audio_codec_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(sirf_audio_codec_dapm_widgets),
	.dapm_routes = sirf_audio_codec_map,
	.num_dapm_routes = ARRAY_SIZE(sirf_audio_codec_map),
	.idle_bias_off = true,
	};

	static const struct of_device_id sirf_audio_codec_of_match[] = {
	{ .compatible = "sirf,prima2-audio-codec" },
	{ .compatible = "sirf,atlas6-audio-codec" },
	{}
	};
	MODULE_DEVICE_TABLE(of, sirf_audio_codec_of_match);

	static const struct regmap_config sirf_audio_codec_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.max_register = AUDIO_IC_CODEC_CTRL3,
	.cache_type = REGCACHE_NONE,
	};

	static int sirf_audio_codec_driver_probe(struct platform_device *pdev)
	{
	int ret;
	struct sirf_audio_codec *sirf_audio_codec;
	void __iomem *base;
	struct resource *mem_res;
	const struct of_device_id *match;

	match = of_match_node(sirf_audio_codec_of_match, pdev->dev.of_node);

	sirf_audio_codec = devm_kzalloc(&pdev->dev,
	sizeof(struct sirf_audio_codec), GFP_KERNEL);
	if (!sirf_audio_codec)
	return -ENOMEM;

	platform_set_drvdata(pdev, sirf_audio_codec);

	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(&pdev->dev, mem_res);
	if (base == NULL)
	return -ENOMEM;

	sirf_audio_codec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
	&sirf_audio_codec_regmap_config);
	if (IS_ERR(sirf_audio_codec->regmap))
	return PTR_ERR(sirf_audio_codec->regmap);

	sirf_audio_codec->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(sirf_audio_codec->clk)) {
	dev_err(&pdev->dev, "Get clock failed.\n");
	return PTR_ERR(sirf_audio_codec->clk);
	}

	ret = clk_prepare_enable(sirf_audio_codec->clk);
	if (ret) {
	dev_err(&pdev->dev, "Enable clock failed.\n");
	return ret;
	}

	ret = snd_soc_register_codec(&(pdev->dev),
	&soc_codec_device_sirf_audio_codec,
	&sirf_audio_codec_dai, 1);
	if (ret) {
	dev_err(&pdev->dev, "Register Audio Codec dai failed.\n");
	goto err_clk_put;
	}

	/*
	* Always open charge pump, if not, when the charge pump closed the
	* adc will not stable
	*/
	regmap_update_bits(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL0,
	IC_CPFREQ, IC_CPFREQ);

	if (of_device_is_compatible(pdev->dev.of_node, "sirf,atlas6-audio-codec"))
	regmap_update_bits(sirf_audio_codec->regmap,
	AUDIO_IC_CODEC_CTRL0, IC_CPEN, IC_CPEN);
	return 0;

	err_clk_put:
	clk_disable_unprepare(sirf_audio_codec->clk);
	return ret;
	}

	static int sirf_audio_codec_driver_remove(struct platform_device *pdev)
	{
	struct sirf_audio_codec *sirf_audio_codec = platform_get_drvdata(pdev);

	clk_disable_unprepare(sirf_audio_codec->clk);
	snd_soc_unregister_codec(&(pdev->dev));

	return 0;
	}

	#ifdef CONFIG_PM_SLEEP
	static int sirf_audio_codec_suspend(struct device *dev)
	{
	struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(dev);

	regmap_read(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL0,
	&sirf_audio_codec->reg_ctrl0);
	regmap_read(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL1,
	&sirf_audio_codec->reg_ctrl1);
	clk_disable_unprepare(sirf_audio_codec->clk);

	return 0;
	}

	static int sirf_audio_codec_resume(struct device *dev)
	{
	struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(dev);
	int ret;

	ret = clk_prepare_enable(sirf_audio_codec->clk);
	if (ret)
	return ret;

	regmap_write(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL0,
	sirf_audio_codec->reg_ctrl0);
	regmap_write(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL1,
	sirf_audio_codec->reg_ctrl1);

	return 0;
	}
	#endif

	static const struct dev_pm_ops sirf_audio_codec_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(sirf_audio_codec_suspend, sirf_audio_codec_resume)
	};

	static struct platform_driver sirf_audio_codec_driver = {
	.driver = {
	.name = "sirf-audio-codec",
	.owner = THIS_MODULE,
	.of_match_table = sirf_audio_codec_of_match,
	.pm = &sirf_audio_codec_pm_ops,
	},
	.probe = sirf_audio_codec_driver_probe,
	.remove = sirf_audio_codec_driver_remove,
	};

	module_platform_driver(sirf_audio_codec_driver);

	MODULE_DESCRIPTION("SiRF audio codec driver");
	MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
	MODULE_LICENSE("GPL v2");