sound/soc/omap/omap-twl4030.c - kernel/msm-4.9 - Gitiles

 /*
  * omap-twl4030.c  --  SoC audio for TI SoC based boards with twl4030 codec
  *
  * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
  * All rights reserved.
  *
  * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
  *
  * This driver replaces the following machine drivers:
  * omap3beagle (Author: Steve Sakoman <steve@sakoman.com>)
  * omap3evm (Author: Anuj Aggarwal <anuj.aggarwal@ti.com>)
  * overo (Author: Steve Sakoman <steve@sakoman.com>)
  * igep0020 (Author: Enric Balletbo i Serra <eballetbo@iseebcn.com>)
  * zoom2 (Author: Misael Lopez Cruz <misael.lopez@ti.com>)
  * sdp3430 (Author: Misael Lopez Cruz <misael.lopez@ti.com>)
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * version 2 as published by the Free Software Foundation.
  *
  * 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/platform_device.h>
 #include <linux/platform_data/omap-twl4030.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>

 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
 #include <sound/jack.h>

 #include "omap-mcbsp.h"

 struct omap_twl4030 {
 	int jack_detect;	/* board can detect jack events */
 	struct snd_soc_jack hs_jack;
 };

 static int omap_twl4030_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	unsigned int fmt;

 	switch (params_channels(params)) {
 	case 2: /* Stereo I2S mode */
 		fmt =	SND_SOC_DAIFMT_I2S |
 			SND_SOC_DAIFMT_NB_NF |
 			SND_SOC_DAIFMT_CBM_CFM;
 		break;
 	case 4: /* Four channel TDM mode */
 		fmt =	SND_SOC_DAIFMT_DSP_A |
 			SND_SOC_DAIFMT_IB_NF |
 			SND_SOC_DAIFMT_CBM_CFM;
 		break;
 	default:
 		return -EINVAL;
 	}

 	return snd_soc_runtime_set_dai_fmt(rtd, fmt);
 }

 static struct snd_soc_ops omap_twl4030_ops = {
 	.hw_params = omap_twl4030_hw_params,
 };

 static const struct snd_soc_dapm_widget dapm_widgets[] = {
 	SND_SOC_DAPM_SPK("Earpiece Spk", NULL),
 	SND_SOC_DAPM_SPK("Handsfree Spk", NULL),
 	SND_SOC_DAPM_HP("Headset Stereophone", NULL),
 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
 	SND_SOC_DAPM_SPK("Carkit Spk", NULL),

 	SND_SOC_DAPM_MIC("Main Mic", NULL),
 	SND_SOC_DAPM_MIC("Sub Mic", NULL),
 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
 	SND_SOC_DAPM_MIC("Carkit Mic", NULL),
 	SND_SOC_DAPM_MIC("Digital0 Mic", NULL),
 	SND_SOC_DAPM_MIC("Digital1 Mic", NULL),
 	SND_SOC_DAPM_LINE("Line In", NULL),
 };

 static const struct snd_soc_dapm_route audio_map[] = {
 	/* Headset Stereophone:  HSOL, HSOR */
 	{"Headset Stereophone", NULL, "HSOL"},
 	{"Headset Stereophone", NULL, "HSOR"},
 	/* External Speakers: HFL, HFR */
 	{"Handsfree Spk", NULL, "HFL"},
 	{"Handsfree Spk", NULL, "HFR"},
 	/* External Speakers: PredrivL, PredrivR */
 	{"Ext Spk", NULL, "PREDRIVEL"},
 	{"Ext Spk", NULL, "PREDRIVER"},
 	/* Carkit speakers:  CARKITL, CARKITR */
 	{"Carkit Spk", NULL, "CARKITL"},
 	{"Carkit Spk", NULL, "CARKITR"},
 	/* Earpiece */
 	{"Earpiece Spk", NULL, "EARPIECE"},

 	/* External Mics: MAINMIC, SUBMIC with bias */
 	{"MAINMIC", NULL, "Main Mic"},
 	{"Main Mic", NULL, "Mic Bias 1"},
 	{"SUBMIC", NULL, "Sub Mic"},
 	{"Sub Mic", NULL, "Mic Bias 2"},
 	/* Headset Mic: HSMIC with bias */
 	{"HSMIC", NULL, "Headset Mic"},
 	{"Headset Mic", NULL, "Headset Mic Bias"},
 	/* Digital Mics: DIGIMIC0, DIGIMIC1 with bias */
 	{"DIGIMIC0", NULL, "Digital0 Mic"},
 	{"Digital0 Mic", NULL, "Mic Bias 1"},
 	{"DIGIMIC1", NULL, "Digital1 Mic"},
 	{"Digital1 Mic", NULL, "Mic Bias 2"},
 	/* Carkit In: CARKITMIC */
 	{"CARKITMIC", NULL, "Carkit Mic"},
 	/* Aux In: AUXL, AUXR */
 	{"AUXL", NULL, "Line In"},
 	{"AUXR", NULL, "Line In"},
 };

 /* Headset jack detection DAPM pins */
 static struct snd_soc_jack_pin hs_jack_pins[] = {
 	{
 		.pin = "Headset Mic",
 		.mask = SND_JACK_MICROPHONE,
 	},
 	{
 		.pin = "Headset Stereophone",
 		.mask = SND_JACK_HEADPHONE,
 	},
 };

 /* Headset jack detection gpios */
 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
 	{
 		.name = "hsdet-gpio",
 		.report = SND_JACK_HEADSET,
 		.debounce_time = 200,
 	},
 };

 static inline void twl4030_disconnect_pin(struct snd_soc_dapm_context *dapm,
 					  int connected, char *pin)
 {
 	if (!connected)
 		snd_soc_dapm_disable_pin(dapm, pin);
 }

 static int omap_twl4030_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_codec *codec = rtd->codec;
 	struct snd_soc_card *card = rtd->card;
 	struct snd_soc_dapm_context *dapm = &codec->dapm;
 	struct omap_tw4030_pdata *pdata = dev_get_platdata(card->dev);
 	struct omap_twl4030 *priv = snd_soc_card_get_drvdata(card);
 	int ret = 0;

 	/* Headset jack detection only if it is supported */
 	if (priv->jack_detect > 0) {
 		hs_jack_gpios[0].gpio = priv->jack_detect;

 		ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
 				       &priv->hs_jack);
 		if (ret)
 			return ret;

 		ret = snd_soc_jack_add_pins(&priv->hs_jack,
 					    ARRAY_SIZE(hs_jack_pins),
 					    hs_jack_pins);
 		if (ret)
 			return ret;

 		ret = snd_soc_jack_add_gpios(&priv->hs_jack,
 					     ARRAY_SIZE(hs_jack_gpios),
 					     hs_jack_gpios);
 		if (ret)
 			return ret;
 	}

 	/*
 	 * NULL pdata means we booted with DT. In this case the routing is
 	 * provided and the card is fully routed, no need to mark pins.
 	 */
 	if (!pdata || !pdata->custom_routing)
 		return ret;

 	/* Disable not connected paths if not used */
 	twl4030_disconnect_pin(dapm, pdata->has_ear, "Earpiece Spk");
 	twl4030_disconnect_pin(dapm, pdata->has_hf, "Handsfree Spk");
 	twl4030_disconnect_pin(dapm, pdata->has_hs, "Headset Stereophone");
 	twl4030_disconnect_pin(dapm, pdata->has_predriv, "Ext Spk");
 	twl4030_disconnect_pin(dapm, pdata->has_carkit, "Carkit Spk");

 	twl4030_disconnect_pin(dapm, pdata->has_mainmic, "Main Mic");
 	twl4030_disconnect_pin(dapm, pdata->has_submic, "Sub Mic");
 	twl4030_disconnect_pin(dapm, pdata->has_hsmic, "Headset Mic");
 	twl4030_disconnect_pin(dapm, pdata->has_carkitmic, "Carkit Mic");
 	twl4030_disconnect_pin(dapm, pdata->has_digimic0, "Digital0 Mic");
 	twl4030_disconnect_pin(dapm, pdata->has_digimic1, "Digital1 Mic");
 	twl4030_disconnect_pin(dapm, pdata->has_linein, "Line In");

 	return ret;
 }

 static int omap_twl4030_card_remove(struct snd_soc_card *card)
 {
 	struct omap_twl4030 *priv = snd_soc_card_get_drvdata(card);

 	if (priv->jack_detect > 0)
 		snd_soc_jack_free_gpios(&priv->hs_jack,
 					ARRAY_SIZE(hs_jack_gpios),
 					hs_jack_gpios);

 	return 0;
 }

 /* Digital audio interface glue - connects codec <--> CPU */
 static struct snd_soc_dai_link omap_twl4030_dai_links[] = {
 	{
 		.name = "TWL4030 HiFi",
 		.stream_name = "TWL4030 HiFi",
 		.cpu_dai_name = "omap-mcbsp.2",
 		.codec_dai_name = "twl4030-hifi",
 		.platform_name = "omap-mcbsp.2",
 		.codec_name = "twl4030-codec",
 		.init = omap_twl4030_init,
 		.ops = &omap_twl4030_ops,
 	},
 	{
 		.name = "TWL4030 Voice",
 		.stream_name = "TWL4030 Voice",
 		.cpu_dai_name = "omap-mcbsp.3",
 		.codec_dai_name = "twl4030-voice",
 		.platform_name = "omap-mcbsp.3",
 		.codec_name = "twl4030-codec",
 		.dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF |
 			   SND_SOC_DAIFMT_CBM_CFM,
 	},
 };

 /* Audio machine driver */
 static struct snd_soc_card omap_twl4030_card = {
 	.owner = THIS_MODULE,
 	.remove = omap_twl4030_card_remove,
 	.dai_link = omap_twl4030_dai_links,
 	.num_links = ARRAY_SIZE(omap_twl4030_dai_links),

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

 static int omap_twl4030_probe(struct platform_device *pdev)
 {
 	struct omap_tw4030_pdata *pdata = dev_get_platdata(&pdev->dev);
 	struct device_node *node = pdev->dev.of_node;
 	struct snd_soc_card *card = &omap_twl4030_card;
 	struct omap_twl4030 *priv;
 	int ret = 0;

 	card->dev = &pdev->dev;

 	priv = devm_kzalloc(&pdev->dev, sizeof(struct omap_twl4030), GFP_KERNEL);
 	if (priv == NULL)
 		return -ENOMEM;

 	if (node) {
 		struct device_node *dai_node;
 		struct property *prop;

 		if (snd_soc_of_parse_card_name(card, "ti,model")) {
 			dev_err(&pdev->dev, "Card name is not provided\n");
 			return -ENODEV;
 		}

 		dai_node = of_parse_phandle(node, "ti,mcbsp", 0);
 		if (!dai_node) {
 			dev_err(&pdev->dev, "McBSP node is not provided\n");
 			return -EINVAL;
 		}
 		omap_twl4030_dai_links[0].cpu_dai_name  = NULL;
 		omap_twl4030_dai_links[0].cpu_of_node = dai_node;

 		omap_twl4030_dai_links[0].platform_name  = NULL;
 		omap_twl4030_dai_links[0].platform_of_node = dai_node;

 		dai_node = of_parse_phandle(node, "ti,mcbsp-voice", 0);
 		if (!dai_node) {
 			card->num_links = 1;
 		} else {
 			omap_twl4030_dai_links[1].cpu_dai_name  = NULL;
 			omap_twl4030_dai_links[1].cpu_of_node = dai_node;

 			omap_twl4030_dai_links[1].platform_name  = NULL;
 			omap_twl4030_dai_links[1].platform_of_node = dai_node;
 		}

 		priv->jack_detect = of_get_named_gpio(node,
 						      "ti,jack-det-gpio", 0);

 		/* Optional: audio routing can be provided */
 		prop = of_find_property(node, "ti,audio-routing", NULL);
 		if (prop) {
 			ret = snd_soc_of_parse_audio_routing(card,
 							    "ti,audio-routing");
 			if (ret)
 				return ret;

 			card->fully_routed = 1;
 		}
 	} else if (pdata) {
 		if (pdata->card_name) {
 			card->name = pdata->card_name;
 		} else {
 			dev_err(&pdev->dev, "Card name is not provided\n");
 			return -ENODEV;
 		}

 		if (!pdata->voice_connected)
 			card->num_links = 1;

 		priv->jack_detect = pdata->jack_detect;
 	} else {
 		dev_err(&pdev->dev, "Missing pdata\n");
 		return -ENODEV;
 	}

 	snd_soc_card_set_drvdata(card, priv);
 	ret = devm_snd_soc_register_card(&pdev->dev, card);
 	if (ret) {
 		dev_err(&pdev->dev, "devm_snd_soc_register_card() failed: %d\n",
 			ret);
 		return ret;
 	}

 	return 0;
 }

 static const struct of_device_id omap_twl4030_of_match[] = {
 	{.compatible = "ti,omap-twl4030", },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, omap_twl4030_of_match);

 static struct platform_driver omap_twl4030_driver = {
 	.driver = {
 		.name = "omap-twl4030",
 		.pm = &snd_soc_pm_ops,
 		.of_match_table = omap_twl4030_of_match,
 	},
 	.probe = omap_twl4030_probe,
 };

 module_platform_driver(omap_twl4030_driver);

 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
 MODULE_DESCRIPTION("ALSA SoC for TI SoC based boards with twl4030 codec");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:omap-twl4030");
	/*
	* omap-twl4030.c -- SoC audio for TI SoC based boards with twl4030 codec
	*
	* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
	* All rights reserved.
	*
	* Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
	*
	* This driver replaces the following machine drivers:
	* omap3beagle (Author: Steve Sakoman <steve@sakoman.com>)
	* omap3evm (Author: Anuj Aggarwal <anuj.aggarwal@ti.com>)
	* overo (Author: Steve Sakoman <steve@sakoman.com>)
	* igep0020 (Author: Enric Balletbo i Serra <eballetbo@iseebcn.com>)
	* zoom2 (Author: Misael Lopez Cruz <misael.lopez@ti.com>)
	* sdp3430 (Author: Misael Lopez Cruz <misael.lopez@ti.com>)
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* version 2 as published by the Free Software Foundation.
	*
	* 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/platform_device.h>
	#include <linux/platform_data/omap-twl4030.h>
	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/gpio.h>
	#include <linux/of_gpio.h>

	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/soc.h>
	#include <sound/jack.h>

	#include "omap-mcbsp.h"

	struct omap_twl4030 {
	int jack_detect; /* board can detect jack events */
	struct snd_soc_jack hs_jack;
	};

	static int omap_twl4030_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	unsigned int fmt;

	switch (params_channels(params)) {
	case 2: /* Stereo I2S mode */
	fmt = SND_SOC_DAIFMT_I2S \|
	SND_SOC_DAIFMT_NB_NF \|
	SND_SOC_DAIFMT_CBM_CFM;
	break;
	case 4: /* Four channel TDM mode */
	fmt = SND_SOC_DAIFMT_DSP_A \|
	SND_SOC_DAIFMT_IB_NF \|
	SND_SOC_DAIFMT_CBM_CFM;
	break;
	default:
	return -EINVAL;
	}

	return snd_soc_runtime_set_dai_fmt(rtd, fmt);
	}

	static struct snd_soc_ops omap_twl4030_ops = {
	.hw_params = omap_twl4030_hw_params,
	};

	static const struct snd_soc_dapm_widget dapm_widgets[] = {
	SND_SOC_DAPM_SPK("Earpiece Spk", NULL),
	SND_SOC_DAPM_SPK("Handsfree Spk", NULL),
	SND_SOC_DAPM_HP("Headset Stereophone", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	SND_SOC_DAPM_SPK("Carkit Spk", NULL),

	SND_SOC_DAPM_MIC("Main Mic", NULL),
	SND_SOC_DAPM_MIC("Sub Mic", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Carkit Mic", NULL),
	SND_SOC_DAPM_MIC("Digital0 Mic", NULL),
	SND_SOC_DAPM_MIC("Digital1 Mic", NULL),
	SND_SOC_DAPM_LINE("Line In", NULL),
	};

	static const struct snd_soc_dapm_route audio_map[] = {
	/* Headset Stereophone: HSOL, HSOR */
	{"Headset Stereophone", NULL, "HSOL"},
	{"Headset Stereophone", NULL, "HSOR"},
	/* External Speakers: HFL, HFR */
	{"Handsfree Spk", NULL, "HFL"},
	{"Handsfree Spk", NULL, "HFR"},
	/* External Speakers: PredrivL, PredrivR */
	{"Ext Spk", NULL, "PREDRIVEL"},
	{"Ext Spk", NULL, "PREDRIVER"},
	/* Carkit speakers: CARKITL, CARKITR */
	{"Carkit Spk", NULL, "CARKITL"},
	{"Carkit Spk", NULL, "CARKITR"},
	/* Earpiece */
	{"Earpiece Spk", NULL, "EARPIECE"},

	/* External Mics: MAINMIC, SUBMIC with bias */
	{"MAINMIC", NULL, "Main Mic"},
	{"Main Mic", NULL, "Mic Bias 1"},
	{"SUBMIC", NULL, "Sub Mic"},
	{"Sub Mic", NULL, "Mic Bias 2"},
	/* Headset Mic: HSMIC with bias */
	{"HSMIC", NULL, "Headset Mic"},
	{"Headset Mic", NULL, "Headset Mic Bias"},
	/* Digital Mics: DIGIMIC0, DIGIMIC1 with bias */
	{"DIGIMIC0", NULL, "Digital0 Mic"},
	{"Digital0 Mic", NULL, "Mic Bias 1"},
	{"DIGIMIC1", NULL, "Digital1 Mic"},
	{"Digital1 Mic", NULL, "Mic Bias 2"},
	/* Carkit In: CARKITMIC */
	{"CARKITMIC", NULL, "Carkit Mic"},
	/* Aux In: AUXL, AUXR */
	{"AUXL", NULL, "Line In"},
	{"AUXR", NULL, "Line In"},
	};

	/* Headset jack detection DAPM pins */
	static struct snd_soc_jack_pin hs_jack_pins[] = {
	{
	.pin = "Headset Mic",
	.mask = SND_JACK_MICROPHONE,
	},
	{
	.pin = "Headset Stereophone",
	.mask = SND_JACK_HEADPHONE,
	},
	};

	/* Headset jack detection gpios */
	static struct snd_soc_jack_gpio hs_jack_gpios[] = {
	{
	.name = "hsdet-gpio",
	.report = SND_JACK_HEADSET,
	.debounce_time = 200,
	},
	};

	static inline void twl4030_disconnect_pin(struct snd_soc_dapm_context *dapm,
	int connected, char *pin)
	{
	if (!connected)
	snd_soc_dapm_disable_pin(dapm, pin);
	}

	static int omap_twl4030_init(struct snd_soc_pcm_runtime *rtd)
	{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_card *card = rtd->card;
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	struct omap_tw4030_pdata *pdata = dev_get_platdata(card->dev);
	struct omap_twl4030 *priv = snd_soc_card_get_drvdata(card);
	int ret = 0;

	/* Headset jack detection only if it is supported */
	if (priv->jack_detect > 0) {
	hs_jack_gpios[0].gpio = priv->jack_detect;

	ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
	&priv->hs_jack);
	if (ret)
	return ret;

	ret = snd_soc_jack_add_pins(&priv->hs_jack,
	ARRAY_SIZE(hs_jack_pins),
	hs_jack_pins);
	if (ret)
	return ret;

	ret = snd_soc_jack_add_gpios(&priv->hs_jack,
	ARRAY_SIZE(hs_jack_gpios),
	hs_jack_gpios);
	if (ret)
	return ret;
	}

	/*
	* NULL pdata means we booted with DT. In this case the routing is
	* provided and the card is fully routed, no need to mark pins.
	*/
	if (!pdata \|\| !pdata->custom_routing)
	return ret;

	/* Disable not connected paths if not used */
	twl4030_disconnect_pin(dapm, pdata->has_ear, "Earpiece Spk");
	twl4030_disconnect_pin(dapm, pdata->has_hf, "Handsfree Spk");
	twl4030_disconnect_pin(dapm, pdata->has_hs, "Headset Stereophone");
	twl4030_disconnect_pin(dapm, pdata->has_predriv, "Ext Spk");
	twl4030_disconnect_pin(dapm, pdata->has_carkit, "Carkit Spk");

	twl4030_disconnect_pin(dapm, pdata->has_mainmic, "Main Mic");
	twl4030_disconnect_pin(dapm, pdata->has_submic, "Sub Mic");
	twl4030_disconnect_pin(dapm, pdata->has_hsmic, "Headset Mic");
	twl4030_disconnect_pin(dapm, pdata->has_carkitmic, "Carkit Mic");
	twl4030_disconnect_pin(dapm, pdata->has_digimic0, "Digital0 Mic");
	twl4030_disconnect_pin(dapm, pdata->has_digimic1, "Digital1 Mic");
	twl4030_disconnect_pin(dapm, pdata->has_linein, "Line In");

	return ret;
	}

	static int omap_twl4030_card_remove(struct snd_soc_card *card)
	{
	struct omap_twl4030 *priv = snd_soc_card_get_drvdata(card);

	if (priv->jack_detect > 0)
	snd_soc_jack_free_gpios(&priv->hs_jack,
	ARRAY_SIZE(hs_jack_gpios),
	hs_jack_gpios);

	return 0;
	}

	/* Digital audio interface glue - connects codec <--> CPU */
	static struct snd_soc_dai_link omap_twl4030_dai_links[] = {
	{
	.name = "TWL4030 HiFi",
	.stream_name = "TWL4030 HiFi",
	.cpu_dai_name = "omap-mcbsp.2",
	.codec_dai_name = "twl4030-hifi",
	.platform_name = "omap-mcbsp.2",
	.codec_name = "twl4030-codec",
	.init = omap_twl4030_init,
	.ops = &omap_twl4030_ops,
	},
	{
	.name = "TWL4030 Voice",
	.stream_name = "TWL4030 Voice",
	.cpu_dai_name = "omap-mcbsp.3",
	.codec_dai_name = "twl4030-voice",
	.platform_name = "omap-mcbsp.3",
	.codec_name = "twl4030-codec",
	.dai_fmt = SND_SOC_DAIFMT_DSP_A \| SND_SOC_DAIFMT_IB_NF \|
	SND_SOC_DAIFMT_CBM_CFM,
	},
	};

	/* Audio machine driver */
	static struct snd_soc_card omap_twl4030_card = {
	.owner = THIS_MODULE,
	.remove = omap_twl4030_card_remove,
	.dai_link = omap_twl4030_dai_links,
	.num_links = ARRAY_SIZE(omap_twl4030_dai_links),

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

	static int omap_twl4030_probe(struct platform_device *pdev)
	{
	struct omap_tw4030_pdata *pdata = dev_get_platdata(&pdev->dev);
	struct device_node *node = pdev->dev.of_node;
	struct snd_soc_card *card = &omap_twl4030_card;
	struct omap_twl4030 *priv;
	int ret = 0;

	card->dev = &pdev->dev;

	priv = devm_kzalloc(&pdev->dev, sizeof(struct omap_twl4030), GFP_KERNEL);
	if (priv == NULL)
	return -ENOMEM;

	if (node) {
	struct device_node *dai_node;
	struct property *prop;

	if (snd_soc_of_parse_card_name(card, "ti,model")) {
	dev_err(&pdev->dev, "Card name is not provided\n");
	return -ENODEV;
	}

	dai_node = of_parse_phandle(node, "ti,mcbsp", 0);
	if (!dai_node) {
	dev_err(&pdev->dev, "McBSP node is not provided\n");
	return -EINVAL;
	}
	omap_twl4030_dai_links[0].cpu_dai_name = NULL;
	omap_twl4030_dai_links[0].cpu_of_node = dai_node;

	omap_twl4030_dai_links[0].platform_name = NULL;
	omap_twl4030_dai_links[0].platform_of_node = dai_node;

	dai_node = of_parse_phandle(node, "ti,mcbsp-voice", 0);
	if (!dai_node) {
	card->num_links = 1;
	} else {
	omap_twl4030_dai_links[1].cpu_dai_name = NULL;
	omap_twl4030_dai_links[1].cpu_of_node = dai_node;

	omap_twl4030_dai_links[1].platform_name = NULL;
	omap_twl4030_dai_links[1].platform_of_node = dai_node;
	}

	priv->jack_detect = of_get_named_gpio(node,
	"ti,jack-det-gpio", 0);

	/* Optional: audio routing can be provided */
	prop = of_find_property(node, "ti,audio-routing", NULL);
	if (prop) {
	ret = snd_soc_of_parse_audio_routing(card,
	"ti,audio-routing");
	if (ret)
	return ret;

	card->fully_routed = 1;
	}
	} else if (pdata) {
	if (pdata->card_name) {
	card->name = pdata->card_name;
	} else {
	dev_err(&pdev->dev, "Card name is not provided\n");
	return -ENODEV;
	}

	if (!pdata->voice_connected)
	card->num_links = 1;

	priv->jack_detect = pdata->jack_detect;
	} else {
	dev_err(&pdev->dev, "Missing pdata\n");
	return -ENODEV;
	}

	snd_soc_card_set_drvdata(card, priv);
	ret = devm_snd_soc_register_card(&pdev->dev, card);
	if (ret) {
	dev_err(&pdev->dev, "devm_snd_soc_register_card() failed: %d\n",
	ret);
	return ret;
	}

	return 0;
	}

	static const struct of_device_id omap_twl4030_of_match[] = {
	{.compatible = "ti,omap-twl4030", },
	{ },
	};
	MODULE_DEVICE_TABLE(of, omap_twl4030_of_match);

	static struct platform_driver omap_twl4030_driver = {
	.driver = {
	.name = "omap-twl4030",
	.pm = &snd_soc_pm_ops,
	.of_match_table = omap_twl4030_of_match,
	},
	.probe = omap_twl4030_probe,
	};

	module_platform_driver(omap_twl4030_driver);

	MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
	MODULE_DESCRIPTION("ALSA SoC for TI SoC based boards with twl4030 codec");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:omap-twl4030");