sound/soc/codecs/wl1273.c - kernel/msm-4.9 - Gitiles

 /*
  * ALSA SoC WL1273 codec driver
  *
  * Author:      Matti Aaltonen, <matti.j.aaltonen@nokia.com>
  *
  * Copyright:   (C) 2010, 2011 Nokia Corporation
  *
  * 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.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA
  *
  */

 #include <linux/mfd/wl1273-core.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/initval.h>

 #include "wl1273.h"

 enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };

 /* codec private data */
 struct wl1273_priv {
 	enum wl1273_mode mode;
 	struct wl1273_core *core;
 	unsigned int channels;
 };

 static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
 				      int rate, int width)
 {
 	struct device *dev = &core->client->dev;
 	int r = 0;
 	u16 mode;

 	dev_dbg(dev, "rate: %d\n", rate);
 	dev_dbg(dev, "width: %d\n", width);

 	mutex_lock(&core->lock);

 	mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;

 	switch (rate) {
 	case 48000:
 		mode |= WL1273_IS2_RATE_48K;
 		break;
 	case 44100:
 		mode |= WL1273_IS2_RATE_44_1K;
 		break;
 	case 32000:
 		mode |= WL1273_IS2_RATE_32K;
 		break;
 	case 22050:
 		mode |= WL1273_IS2_RATE_22_05K;
 		break;
 	case 16000:
 		mode |= WL1273_IS2_RATE_16K;
 		break;
 	case 12000:
 		mode |= WL1273_IS2_RATE_12K;
 		break;
 	case 11025:
 		mode |= WL1273_IS2_RATE_11_025;
 		break;
 	case 8000:
 		mode |= WL1273_IS2_RATE_8K;
 		break;
 	default:
 		dev_err(dev, "Sampling rate: %d not supported\n", rate);
 		r = -EINVAL;
 		goto out;
 	}

 	switch (width) {
 	case 16:
 		mode |= WL1273_IS2_WIDTH_32;
 		break;
 	case 20:
 		mode |= WL1273_IS2_WIDTH_40;
 		break;
 	case 24:
 		mode |= WL1273_IS2_WIDTH_48;
 		break;
 	case 25:
 		mode |= WL1273_IS2_WIDTH_50;
 		break;
 	case 30:
 		mode |= WL1273_IS2_WIDTH_60;
 		break;
 	case 32:
 		mode |= WL1273_IS2_WIDTH_64;
 		break;
 	case 40:
 		mode |= WL1273_IS2_WIDTH_80;
 		break;
 	case 48:
 		mode |= WL1273_IS2_WIDTH_96;
 		break;
 	case 64:
 		mode |= WL1273_IS2_WIDTH_128;
 		break;
 	default:
 		dev_err(dev, "Data width: %d not supported\n", width);
 		r = -EINVAL;
 		goto out;
 	}

 	dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n",  WL1273_I2S_DEF_MODE);
 	dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
 	dev_dbg(dev, "mode: 0x%04x\n", mode);

 	if (core->i2s_mode != mode) {
 		r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
 		if (r)
 			goto out;

 		core->i2s_mode = mode;
 		r = core->write(core, WL1273_AUDIO_ENABLE,
 				WL1273_AUDIO_ENABLE_I2S);
 		if (r)
 			goto out;
 	}
 out:
 	mutex_unlock(&core->lock);

 	return r;
 }

 static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
 					    int channel_number)
 {
 	struct device *dev = &core->client->dev;
 	int r = 0;

 	dev_dbg(dev, "%s\n", __func__);

 	mutex_lock(&core->lock);

 	if (core->channel_number == channel_number)
 		goto out;

 	if (channel_number == 1 && core->mode == WL1273_MODE_RX)
 		r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
 	else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
 		r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
 	else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
 		r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
 	else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
 		r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
 	else
 		r = -EINVAL;
 out:
 	mutex_unlock(&core->lock);

 	return r;
 }

 static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
 				      struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

 	ucontrol->value.integer.value[0] = wl1273->mode;

 	return 0;
 }

 /*
  * TODO: Implement the audio routing in the driver. Now this control
  * only indicates the setting that has been done elsewhere (in the user
  * space).
  */
 static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };

 static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
 				      struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

 	if (wl1273->mode == ucontrol->value.integer.value[0])
 		return 0;

 	/* Do not allow changes while stream is running */
 	if (codec->active)
 		return -EPERM;

 	if (ucontrol->value.integer.value[0] < 0 ||
 	    ucontrol->value.integer.value[0] >=  ARRAY_SIZE(wl1273_audio_route))
 		return -EINVAL;

 	wl1273->mode = ucontrol->value.integer.value[0];

 	return 1;
 }

 static const struct soc_enum wl1273_enum =
 	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);

 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
 				   struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

 	dev_dbg(codec->dev, "%s: enter.\n", __func__);

 	ucontrol->value.integer.value[0] = wl1273->core->audio_mode;

 	return 0;
 }

 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
 				   struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 	int val, r = 0;

 	dev_dbg(codec->dev, "%s: enter.\n", __func__);

 	val = ucontrol->value.integer.value[0];
 	if (wl1273->core->audio_mode == val)
 		return 0;

 	r = wl1273->core->set_audio(wl1273->core, val);
 	if (r < 0)
 		return r;

 	return 1;
 }

 static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };

 static const struct soc_enum wl1273_audio_enum =
 	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
 			    wl1273_audio_strings);

 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
 				    struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

 	dev_dbg(codec->dev, "%s: enter.\n", __func__);

 	ucontrol->value.integer.value[0] = wl1273->core->volume;

 	return 0;
 }

 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
 				    struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 	int r;

 	dev_dbg(codec->dev, "%s: enter.\n", __func__);

 	r = wl1273->core->set_volume(wl1273->core,
 				     ucontrol->value.integer.value[0]);
 	if (r)
 		return r;

 	return 1;
 }

 static const struct snd_kcontrol_new wl1273_controls[] = {
 	SOC_ENUM_EXT("Codec Mode", wl1273_enum,
 		     snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
 	SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
 		     snd_wl1273_fm_audio_get,  snd_wl1273_fm_audio_put),
 	SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
 		       snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
 };

 static const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = {
 	SND_SOC_DAPM_INPUT("RX"),

 	SND_SOC_DAPM_OUTPUT("TX"),
 };

 static const struct snd_soc_dapm_route wl1273_dapm_routes[] = {
 	{ "Capture", NULL, "RX" },

 	{ "TX", NULL, "Playback" },
 };

 static int wl1273_startup(struct snd_pcm_substream *substream,
 			  struct snd_soc_dai *dai)
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

 	switch (wl1273->mode) {
 	case WL1273_MODE_BT:
 		snd_pcm_hw_constraint_minmax(substream->runtime,
 					     SNDRV_PCM_HW_PARAM_RATE,
 					     8000, 8000);
 		snd_pcm_hw_constraint_minmax(substream->runtime,
 					     SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
 		break;
 	case WL1273_MODE_FM_RX:
 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 			pr_err("Cannot play in RX mode.\n");
 			return -EINVAL;
 		}
 		break;
 	case WL1273_MODE_FM_TX:
 		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 			pr_err("Cannot capture in TX mode.\n");
 			return -EINVAL;
 		}
 		break;
 	default:
 		return -EINVAL;
 		break;
 	}

 	return 0;
 }

 static int wl1273_hw_params(struct snd_pcm_substream *substream,
 			    struct snd_pcm_hw_params *params,
 			    struct snd_soc_dai *dai)
 {
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(dai->codec);
 	struct wl1273_core *core = wl1273->core;
 	unsigned int rate, width, r;

 	if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
 		pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
 		return -EINVAL;
 	}

 	rate = params_rate(params);
 	width =  hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;

 	if (wl1273->mode == WL1273_MODE_BT) {
 		if (rate != 8000) {
 			pr_err("Rate %d not supported.\n", params_rate(params));
 			return -EINVAL;
 		}

 		if (params_channels(params) != 1) {
 			pr_err("Only mono supported.\n");
 			return -EINVAL;
 		}

 		return 0;
 	}

 	if (wl1273->mode == WL1273_MODE_FM_TX &&
 	    substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 		pr_err("Only playback supported with TX.\n");
 		return -EINVAL;
 	}

 	if (wl1273->mode == WL1273_MODE_FM_RX  &&
 	    substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		pr_err("Only capture supported with RX.\n");
 		return -EINVAL;
 	}

 	if (wl1273->mode != WL1273_MODE_FM_RX  &&
 	    wl1273->mode != WL1273_MODE_FM_TX) {
 		pr_err("Unexpected mode: %d.\n", wl1273->mode);
 		return -EINVAL;
 	}

 	r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
 	if (r)
 		return r;

 	wl1273->channels = params_channels(params);
 	r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
 	if (r)
 		return r;

 	return 0;
 }

 static const struct snd_soc_dai_ops wl1273_dai_ops = {
 	.startup	= wl1273_startup,
 	.hw_params	= wl1273_hw_params,
 };

 static struct snd_soc_dai_driver wl1273_dai = {
 	.name = "wl1273-fm",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 1,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000_48000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE},
 	.capture = {
 		.stream_name = "Capture",
 		.channels_min = 1,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000_48000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE},
 	.ops = &wl1273_dai_ops,
 };

 /* Audio interface format for the soc_card driver */
 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
 {
 	struct wl1273_priv *wl1273;

 	if (codec == NULL || fmt == NULL)
 		return -EINVAL;

 	wl1273 = snd_soc_codec_get_drvdata(codec);

 	switch (wl1273->mode) {
 	case WL1273_MODE_FM_RX:
 	case WL1273_MODE_FM_TX:
 		*fmt =	SND_SOC_DAIFMT_I2S |
 			SND_SOC_DAIFMT_NB_NF |
 			SND_SOC_DAIFMT_CBM_CFM;

 		break;
 	case WL1273_MODE_BT:
 		*fmt =	SND_SOC_DAIFMT_DSP_A |
 			SND_SOC_DAIFMT_IB_NF |
 			SND_SOC_DAIFMT_CBM_CFM;

 		break;
 	default:
 		return -EINVAL;
 	}

 	return 0;
 }
 EXPORT_SYMBOL_GPL(wl1273_get_format);

 static int wl1273_probe(struct snd_soc_codec *codec)
 {
 	struct wl1273_core **core = codec->dev->platform_data;
 	struct wl1273_priv *wl1273;
 	int r;

 	dev_dbg(codec->dev, "%s.\n", __func__);

 	if (!core) {
 		dev_err(codec->dev, "Platform data is missing.\n");
 		return -EINVAL;
 	}

 	wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
 	if (wl1273 == NULL) {
 		dev_err(codec->dev, "Cannot allocate memory.\n");
 		return -ENOMEM;
 	}

 	wl1273->mode = WL1273_MODE_BT;
 	wl1273->core = *core;

 	snd_soc_codec_set_drvdata(codec, wl1273);

 	r = snd_soc_add_codec_controls(codec, wl1273_controls,
 				 ARRAY_SIZE(wl1273_controls));
 	if (r)
 		kfree(wl1273);

 	return r;
 }

 static int wl1273_remove(struct snd_soc_codec *codec)
 {
 	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

 	dev_dbg(codec->dev, "%s\n", __func__);
 	kfree(wl1273);

 	return 0;
 }

 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
 	.probe = wl1273_probe,
 	.remove = wl1273_remove,

 	.dapm_widgets = wl1273_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets),
 	.dapm_routes = wl1273_dapm_routes,
 	.num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes),
 };

 static int wl1273_platform_probe(struct platform_device *pdev)
 {
 	return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
 				      &wl1273_dai, 1);
 }

 static int wl1273_platform_remove(struct platform_device *pdev)
 {
 	snd_soc_unregister_codec(&pdev->dev);
 	return 0;
 }

 MODULE_ALIAS("platform:wl1273-codec");

 static struct platform_driver wl1273_platform_driver = {
 	.driver		= {
 		.name	= "wl1273-codec",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= wl1273_platform_probe,
 	.remove		= wl1273_platform_remove,
 };

 module_platform_driver(wl1273_platform_driver);

 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
 MODULE_LICENSE("GPL");
	/*
	* ALSA SoC WL1273 codec driver
	*
	* Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com>
	*
	* Copyright: (C) 2010, 2011 Nokia Corporation
	*
	* 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.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	* 02110-1301 USA
	*
	*/

	#include <linux/mfd/wl1273-core.h>
	#include <linux/slab.h>
	#include <linux/module.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/soc.h>
	#include <sound/initval.h>

	#include "wl1273.h"

	enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };

	/* codec private data */
	struct wl1273_priv {
	enum wl1273_mode mode;
	struct wl1273_core *core;
	unsigned int channels;
	};

	static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
	int rate, int width)
	{
	struct device *dev = &core->client->dev;
	int r = 0;
	u16 mode;

	dev_dbg(dev, "rate: %d\n", rate);
	dev_dbg(dev, "width: %d\n", width);

	mutex_lock(&core->lock);

	mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;

	switch (rate) {
	case 48000:
	mode \|= WL1273_IS2_RATE_48K;
	break;
	case 44100:
	mode \|= WL1273_IS2_RATE_44_1K;
	break;
	case 32000:
	mode \|= WL1273_IS2_RATE_32K;
	break;
	case 22050:
	mode \|= WL1273_IS2_RATE_22_05K;
	break;
	case 16000:
	mode \|= WL1273_IS2_RATE_16K;
	break;
	case 12000:
	mode \|= WL1273_IS2_RATE_12K;
	break;
	case 11025:
	mode \|= WL1273_IS2_RATE_11_025;
	break;
	case 8000:
	mode \|= WL1273_IS2_RATE_8K;
	break;
	default:
	dev_err(dev, "Sampling rate: %d not supported\n", rate);
	r = -EINVAL;
	goto out;
	}

	switch (width) {
	case 16:
	mode \|= WL1273_IS2_WIDTH_32;
	break;
	case 20:
	mode \|= WL1273_IS2_WIDTH_40;
	break;
	case 24:
	mode \|= WL1273_IS2_WIDTH_48;
	break;
	case 25:
	mode \|= WL1273_IS2_WIDTH_50;
	break;
	case 30:
	mode \|= WL1273_IS2_WIDTH_60;
	break;
	case 32:
	mode \|= WL1273_IS2_WIDTH_64;
	break;
	case 40:
	mode \|= WL1273_IS2_WIDTH_80;
	break;
	case 48:
	mode \|= WL1273_IS2_WIDTH_96;
	break;
	case 64:
	mode \|= WL1273_IS2_WIDTH_128;
	break;
	default:
	dev_err(dev, "Data width: %d not supported\n", width);
	r = -EINVAL;
	goto out;
	}

	dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n", WL1273_I2S_DEF_MODE);
	dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
	dev_dbg(dev, "mode: 0x%04x\n", mode);

	if (core->i2s_mode != mode) {
	r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
	if (r)
	goto out;

	core->i2s_mode = mode;
	r = core->write(core, WL1273_AUDIO_ENABLE,
	WL1273_AUDIO_ENABLE_I2S);
	if (r)
	goto out;
	}
	out:
	mutex_unlock(&core->lock);

	return r;
	}

	static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
	int channel_number)
	{
	struct device *dev = &core->client->dev;
	int r = 0;

	dev_dbg(dev, "%s\n", __func__);

	mutex_lock(&core->lock);

	if (core->channel_number == channel_number)
	goto out;

	if (channel_number == 1 && core->mode == WL1273_MODE_RX)
	r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
	else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
	r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
	else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
	r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
	else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
	r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
	else
	r = -EINVAL;
	out:
	mutex_unlock(&core->lock);

	return r;
	}

	static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	ucontrol->value.integer.value[0] = wl1273->mode;

	return 0;
	}

	/*
	* TODO: Implement the audio routing in the driver. Now this control
	* only indicates the setting that has been done elsewhere (in the user
	* space).
	*/
	static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };

	static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	if (wl1273->mode == ucontrol->value.integer.value[0])
	return 0;

	/* Do not allow changes while stream is running */
	if (codec->active)
	return -EPERM;

	if (ucontrol->value.integer.value[0] < 0 \|\|
	ucontrol->value.integer.value[0] >= ARRAY_SIZE(wl1273_audio_route))
	return -EINVAL;

	wl1273->mode = ucontrol->value.integer.value[0];

	return 1;
	}

	static const struct soc_enum wl1273_enum =
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);

	static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	dev_dbg(codec->dev, "%s: enter.\n", __func__);

	ucontrol->value.integer.value[0] = wl1273->core->audio_mode;

	return 0;
	}

	static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
	int val, r = 0;

	dev_dbg(codec->dev, "%s: enter.\n", __func__);

	val = ucontrol->value.integer.value[0];
	if (wl1273->core->audio_mode == val)
	return 0;

	r = wl1273->core->set_audio(wl1273->core, val);
	if (r < 0)
	return r;

	return 1;
	}

	static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };

	static const struct soc_enum wl1273_audio_enum =
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
	wl1273_audio_strings);

	static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	dev_dbg(codec->dev, "%s: enter.\n", __func__);

	ucontrol->value.integer.value[0] = wl1273->core->volume;

	return 0;
	}

	static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
	int r;

	dev_dbg(codec->dev, "%s: enter.\n", __func__);

	r = wl1273->core->set_volume(wl1273->core,
	ucontrol->value.integer.value[0]);
	if (r)
	return r;

	return 1;
	}

	static const struct snd_kcontrol_new wl1273_controls[] = {
	SOC_ENUM_EXT("Codec Mode", wl1273_enum,
	snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
	SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
	snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put),
	SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
	snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
	};

	static const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("RX"),

	SND_SOC_DAPM_OUTPUT("TX"),
	};

	static const struct snd_soc_dapm_route wl1273_dapm_routes[] = {
	{ "Capture", NULL, "RX" },

	{ "TX", NULL, "Playback" },
	};

	static int wl1273_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	struct snd_soc_codec *codec = dai->codec;
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	switch (wl1273->mode) {
	case WL1273_MODE_BT:
	snd_pcm_hw_constraint_minmax(substream->runtime,
	SNDRV_PCM_HW_PARAM_RATE,
	8000, 8000);
	snd_pcm_hw_constraint_minmax(substream->runtime,
	SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
	break;
	case WL1273_MODE_FM_RX:
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	pr_err("Cannot play in RX mode.\n");
	return -EINVAL;
	}
	break;
	case WL1273_MODE_FM_TX:
	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
	pr_err("Cannot capture in TX mode.\n");
	return -EINVAL;
	}
	break;
	default:
	return -EINVAL;
	break;
	}

	return 0;
	}

	static int wl1273_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
	{
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(dai->codec);
	struct wl1273_core *core = wl1273->core;
	unsigned int rate, width, r;

	if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
	pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
	return -EINVAL;
	}

	rate = params_rate(params);
	width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;

	if (wl1273->mode == WL1273_MODE_BT) {
	if (rate != 8000) {
	pr_err("Rate %d not supported.\n", params_rate(params));
	return -EINVAL;
	}

	if (params_channels(params) != 1) {
	pr_err("Only mono supported.\n");
	return -EINVAL;
	}

	return 0;
	}

	if (wl1273->mode == WL1273_MODE_FM_TX &&
	substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
	pr_err("Only playback supported with TX.\n");
	return -EINVAL;
	}

	if (wl1273->mode == WL1273_MODE_FM_RX &&
	substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	pr_err("Only capture supported with RX.\n");
	return -EINVAL;
	}

	if (wl1273->mode != WL1273_MODE_FM_RX &&
	wl1273->mode != WL1273_MODE_FM_TX) {
	pr_err("Unexpected mode: %d.\n", wl1273->mode);
	return -EINVAL;
	}

	r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
	if (r)
	return r;

	wl1273->channels = params_channels(params);
	r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
	if (r)
	return r;

	return 0;
	}

	static const struct snd_soc_dai_ops wl1273_dai_ops = {
	.startup = wl1273_startup,
	.hw_params = wl1273_hw_params,
	};

	static struct snd_soc_dai_driver wl1273_dai = {
	.name = "wl1273-fm",
	.playback = {
	.stream_name = "Playback",
	.channels_min = 1,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_8000_48000,
	.formats = SNDRV_PCM_FMTBIT_S16_LE},
	.capture = {
	.stream_name = "Capture",
	.channels_min = 1,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_8000_48000,
	.formats = SNDRV_PCM_FMTBIT_S16_LE},
	.ops = &wl1273_dai_ops,
	};

	/* Audio interface format for the soc_card driver */
	int wl1273_get_format(struct snd_soc_codec codec, unsigned int fmt)
	{
	struct wl1273_priv *wl1273;

	if (codec == NULL \|\| fmt == NULL)
	return -EINVAL;

	wl1273 = snd_soc_codec_get_drvdata(codec);

	switch (wl1273->mode) {
	case WL1273_MODE_FM_RX:
	case WL1273_MODE_FM_TX:
	*fmt = SND_SOC_DAIFMT_I2S \|
	SND_SOC_DAIFMT_NB_NF \|
	SND_SOC_DAIFMT_CBM_CFM;

	break;
	case WL1273_MODE_BT:
	*fmt = SND_SOC_DAIFMT_DSP_A \|
	SND_SOC_DAIFMT_IB_NF \|
	SND_SOC_DAIFMT_CBM_CFM;

	break;
	default:
	return -EINVAL;
	}

	return 0;
	}
	EXPORT_SYMBOL_GPL(wl1273_get_format);

	static int wl1273_probe(struct snd_soc_codec *codec)
	{
	struct wl1273_core **core = codec->dev->platform_data;
	struct wl1273_priv *wl1273;
	int r;

	dev_dbg(codec->dev, "%s.\n", __func__);

	if (!core) {
	dev_err(codec->dev, "Platform data is missing.\n");
	return -EINVAL;
	}

	wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
	if (wl1273 == NULL) {
	dev_err(codec->dev, "Cannot allocate memory.\n");
	return -ENOMEM;
	}

	wl1273->mode = WL1273_MODE_BT;
	wl1273->core = *core;

	snd_soc_codec_set_drvdata(codec, wl1273);

	r = snd_soc_add_codec_controls(codec, wl1273_controls,
	ARRAY_SIZE(wl1273_controls));
	if (r)
	kfree(wl1273);

	return r;
	}

	static int wl1273_remove(struct snd_soc_codec *codec)
	{
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	dev_dbg(codec->dev, "%s\n", __func__);
	kfree(wl1273);

	return 0;
	}

	static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
	.probe = wl1273_probe,
	.remove = wl1273_remove,

	.dapm_widgets = wl1273_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets),
	.dapm_routes = wl1273_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes),
	};

	static int wl1273_platform_probe(struct platform_device *pdev)
	{
	return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
	&wl1273_dai, 1);
	}

	static int wl1273_platform_remove(struct platform_device *pdev)
	{
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
	}

	MODULE_ALIAS("platform:wl1273-codec");

	static struct platform_driver wl1273_platform_driver = {
	.driver = {
	.name = "wl1273-codec",
	.owner = THIS_MODULE,
	},
	.probe = wl1273_platform_probe,
	.remove = wl1273_platform_remove,
	};

	module_platform_driver(wl1273_platform_driver);

	MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
	MODULE_DESCRIPTION("ASoC WL1273 codec driver");
	MODULE_LICENSE("GPL");