sound/soc/omap/omap-abe-twl6040.c - kernel/msm-4.9 - Gitiles

 /*
  * omap-abe-twl6040.c  --  SoC audio for TI OMAP based boards with ABE and
  *			   twl6040 codec
  *
  * 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/clk.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/twl6040.h>
 #include <linux/platform_data/omap-abe-twl6040.h>
 #include <linux/module.h>
 #include <linux/of.h>

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

 #include "omap-dmic.h"
 #include "omap-mcpdm.h"
 #include "../codecs/twl6040.h"

 struct abe_twl6040 {
 	int	jack_detection;	/* board can detect jack events */
 	int	mclk_freq;	/* MCLK frequency speed for twl6040 */

 	struct platform_device *dmic_codec_dev;
 };

 static int omap_abe_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 	struct snd_soc_codec *codec = rtd->codec;
 	struct snd_soc_card *card = codec->card;
 	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);
 	int clk_id, freq;
 	int ret;

 	clk_id = twl6040_get_clk_id(rtd->codec);
 	if (clk_id == TWL6040_SYSCLK_SEL_HPPLL)
 		freq = priv->mclk_freq;
 	else if (clk_id == TWL6040_SYSCLK_SEL_LPPLL)
 		freq = 32768;
 	else
 		return -EINVAL;

 	/* set the codec mclk */
 	ret = snd_soc_dai_set_sysclk(codec_dai, clk_id, freq,
 				SND_SOC_CLOCK_IN);
 	if (ret) {
 		printk(KERN_ERR "can't set codec system clock\n");
 		return ret;
 	}
 	return ret;
 }

 static struct snd_soc_ops omap_abe_ops = {
 	.hw_params = omap_abe_hw_params,
 };

 static int omap_abe_dmic_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	int ret = 0;

 	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_SYSCLK_PAD_CLKS,
 				     19200000, SND_SOC_CLOCK_IN);
 	if (ret < 0) {
 		printk(KERN_ERR "can't set DMIC cpu system clock\n");
 		return ret;
 	}
 	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_ABE_DMIC_CLK, 2400000,
 				     SND_SOC_CLOCK_OUT);
 	if (ret < 0) {
 		printk(KERN_ERR "can't set DMIC output clock\n");
 		return ret;
 	}
 	return 0;
 }

 static struct snd_soc_ops omap_abe_dmic_ops = {
 	.hw_params = omap_abe_dmic_hw_params,
 };

 /* Headset jack */
 static struct snd_soc_jack hs_jack;

 /*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,
 	},
 };

 /* SDP4430 machine DAPM */
 static const struct snd_soc_dapm_widget twl6040_dapm_widgets[] = {
 	/* Outputs */
 	SND_SOC_DAPM_HP("Headset Stereophone", NULL),
 	SND_SOC_DAPM_SPK("Earphone Spk", NULL),
 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
 	SND_SOC_DAPM_LINE("Line Out", NULL),
 	SND_SOC_DAPM_SPK("Vibrator", NULL),

 	/* Inputs */
 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
 	SND_SOC_DAPM_MIC("Main Handset Mic", NULL),
 	SND_SOC_DAPM_MIC("Sub Handset Mic", NULL),
 	SND_SOC_DAPM_LINE("Line In", NULL),

 	/* Digital microphones */
 	SND_SOC_DAPM_MIC("Digital Mic", NULL),
 };

 static const struct snd_soc_dapm_route audio_map[] = {
 	/* Routings for outputs */
 	{"Headset Stereophone", NULL, "HSOL"},
 	{"Headset Stereophone", NULL, "HSOR"},

 	{"Earphone Spk", NULL, "EP"},

 	{"Ext Spk", NULL, "HFL"},
 	{"Ext Spk", NULL, "HFR"},

 	{"Line Out", NULL, "AUXL"},
 	{"Line Out", NULL, "AUXR"},

 	{"Vibrator", NULL, "VIBRAL"},
 	{"Vibrator", NULL, "VIBRAR"},

 	/* Routings for inputs */
 	{"HSMIC", NULL, "Headset Mic"},
 	{"Headset Mic", NULL, "Headset Mic Bias"},

 	{"MAINMIC", NULL, "Main Handset Mic"},
 	{"Main Handset Mic", NULL, "Main Mic Bias"},

 	{"SUBMIC", NULL, "Sub Handset Mic"},
 	{"Sub Handset Mic", NULL, "Main Mic Bias"},

 	{"AFML", NULL, "Line In"},
 	{"AFMR", NULL, "Line In"},
 };

 static inline void twl6040_disconnect_pin(struct snd_soc_dapm_context *dapm,
 					  int connected, char *pin)
 {
 	if (!connected)
 		snd_soc_dapm_disable_pin(dapm, pin);
 }

 static int omap_abe_twl6040_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_codec *codec = rtd->codec;
 	struct snd_soc_card *card = codec->card;
 	struct snd_soc_dapm_context *dapm = &codec->dapm;
 	struct omap_abe_twl6040_data *pdata = dev_get_platdata(card->dev);
 	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);
 	int hs_trim;
 	int ret = 0;

 	/*
 	 * Configure McPDM offset cancellation based on the HSOTRIM value from
 	 * twl6040.
 	 */
 	hs_trim = twl6040_get_trim_value(codec, TWL6040_TRIM_HSOTRIM);
 	omap_mcpdm_configure_dn_offsets(rtd, TWL6040_HSF_TRIM_LEFT(hs_trim),
 					TWL6040_HSF_TRIM_RIGHT(hs_trim));

 	/* Headset jack detection only if it is supported */
 	if (priv->jack_detection) {
 		ret = snd_soc_jack_new(codec, "Headset Jack",
 					SND_JACK_HEADSET, &hs_jack);
 		if (ret)
 			return ret;

 		ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
 					hs_jack_pins);
 		twl6040_hs_jack_detect(codec, &hs_jack, SND_JACK_HEADSET);
 	}

 	/*
 	 * 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)
 		return ret;

 	/* Disable not connected paths if not used */
 	twl6040_disconnect_pin(dapm, pdata->has_hs, "Headset Stereophone");
 	twl6040_disconnect_pin(dapm, pdata->has_hf, "Ext Spk");
 	twl6040_disconnect_pin(dapm, pdata->has_ep, "Earphone Spk");
 	twl6040_disconnect_pin(dapm, pdata->has_aux, "Line Out");
 	twl6040_disconnect_pin(dapm, pdata->has_vibra, "Vibrator");
 	twl6040_disconnect_pin(dapm, pdata->has_hsmic, "Headset Mic");
 	twl6040_disconnect_pin(dapm, pdata->has_mainmic, "Main Handset Mic");
 	twl6040_disconnect_pin(dapm, pdata->has_submic, "Sub Handset Mic");
 	twl6040_disconnect_pin(dapm, pdata->has_afm, "Line In");

 	return ret;
 }

 static const struct snd_soc_dapm_route dmic_audio_map[] = {
 	{"DMic", NULL, "Digital Mic"},
 	{"Digital Mic", NULL, "Digital Mic1 Bias"},
 };

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

 	return snd_soc_dapm_add_routes(dapm, dmic_audio_map,
 				ARRAY_SIZE(dmic_audio_map));
 }

 /* Digital audio interface glue - connects codec <--> CPU */
 static struct snd_soc_dai_link abe_twl6040_dai_links[] = {
 	{
 		.name = "TWL6040",
 		.stream_name = "TWL6040",
 		.cpu_dai_name = "omap-mcpdm",
 		.codec_dai_name = "twl6040-legacy",
 		.platform_name = "omap-pcm-audio",
 		.codec_name = "twl6040-codec",
 		.init = omap_abe_twl6040_init,
 		.ops = &omap_abe_ops,
 	},
 	{
 		.name = "DMIC",
 		.stream_name = "DMIC Capture",
 		.cpu_dai_name = "omap-dmic",
 		.codec_dai_name = "dmic-hifi",
 		.platform_name = "omap-pcm-audio",
 		.codec_name = "dmic-codec",
 		.init = omap_abe_dmic_init,
 		.ops = &omap_abe_dmic_ops,
 	},
 };

 /* Audio machine driver */
 static struct snd_soc_card omap_abe_card = {
 	.owner = THIS_MODULE,

 	.dapm_widgets = twl6040_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(twl6040_dapm_widgets),
 	.dapm_routes = audio_map,
 	.num_dapm_routes = ARRAY_SIZE(audio_map),
 };

 static int omap_abe_probe(struct platform_device *pdev)
 {
 	struct omap_abe_twl6040_data *pdata = dev_get_platdata(&pdev->dev);
 	struct device_node *node = pdev->dev.of_node;
 	struct snd_soc_card *card = &omap_abe_card;
 	struct abe_twl6040 *priv;
 	int num_links = 0;
 	int ret = 0;

 	card->dev = &pdev->dev;

 	priv = devm_kzalloc(&pdev->dev, sizeof(struct abe_twl6040), GFP_KERNEL);
 	if (priv == NULL)
 		return -ENOMEM;

 	priv->dmic_codec_dev = ERR_PTR(-EINVAL);

 	if (node) {
 		struct device_node *dai_node;

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

 		ret = snd_soc_of_parse_audio_routing(card,
 						"ti,audio-routing");
 		if (ret) {
 			dev_err(&pdev->dev,
 				"Error while parsing DAPM routing\n");
 			return ret;
 		}

 		dai_node = of_parse_phandle(node, "ti,mcpdm", 0);
 		if (!dai_node) {
 			dev_err(&pdev->dev, "McPDM node is not provided\n");
 			return -EINVAL;
 		}
 		abe_twl6040_dai_links[0].cpu_dai_name  = NULL;
 		abe_twl6040_dai_links[0].cpu_of_node = dai_node;

 		dai_node = of_parse_phandle(node, "ti,dmic", 0);
 		if (dai_node) {
 			num_links = 2;
 			abe_twl6040_dai_links[1].cpu_dai_name  = NULL;
 			abe_twl6040_dai_links[1].cpu_of_node = dai_node;

 			priv->dmic_codec_dev = platform_device_register_simple(
 						"dmic-codec", -1, NULL, 0);
 			if (IS_ERR(priv->dmic_codec_dev)) {
 				dev_err(&pdev->dev,
 					"Can't instantiate dmic-codec\n");
 				return PTR_ERR(priv->dmic_codec_dev);
 			}
 		} else {
 			num_links = 1;
 		}

 		priv->jack_detection = of_property_read_bool(node,
 							   "ti,jack-detection");
 		of_property_read_u32(node, "ti,mclk-freq",
 				     &priv->mclk_freq);
 		if (!priv->mclk_freq) {
 			dev_err(&pdev->dev, "MCLK frequency not provided\n");
 			ret = -EINVAL;
 			goto err_unregister;
 		}

 		omap_abe_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->has_dmic)
 			num_links = 2;
 		else
 			num_links = 1;

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


 	if (!priv->mclk_freq) {
 		dev_err(&pdev->dev, "MCLK frequency missing\n");
 		ret = -ENODEV;
 		goto err_unregister;
 	}

 	card->dai_link = abe_twl6040_dai_links;
 	card->num_links = num_links;

 	snd_soc_card_set_drvdata(card, priv);

 	ret = snd_soc_register_card(card);
 	if (ret) {
 		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 			ret);
 		goto err_unregister;
 	}

 	return 0;

 err_unregister:
 	if (!IS_ERR(priv->dmic_codec_dev))
 		platform_device_unregister(priv->dmic_codec_dev);

 	return ret;
 }

 static int omap_abe_remove(struct platform_device *pdev)
 {
 	struct snd_soc_card *card = platform_get_drvdata(pdev);
 	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);

 	snd_soc_unregister_card(card);

 	if (!IS_ERR(priv->dmic_codec_dev))
 		platform_device_unregister(priv->dmic_codec_dev);

 	return 0;
 }

 static const struct of_device_id omap_abe_of_match[] = {
 	{.compatible = "ti,abe-twl6040", },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, omap_abe_of_match);

 static struct platform_driver omap_abe_driver = {
 	.driver = {
 		.name = "omap-abe-twl6040",
 		.owner = THIS_MODULE,
 		.pm = &snd_soc_pm_ops,
 		.of_match_table = omap_abe_of_match,
 	},
 	.probe = omap_abe_probe,
 	.remove = omap_abe_remove,
 };

 module_platform_driver(omap_abe_driver);

 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 MODULE_DESCRIPTION("ALSA SoC for OMAP boards with ABE and twl6040 codec");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:omap-abe-twl6040");
	/*
	* omap-abe-twl6040.c -- SoC audio for TI OMAP based boards with ABE and
	* twl6040 codec
	*
	* 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/clk.h>
	#include <linux/platform_device.h>
	#include <linux/mfd/twl6040.h>
	#include <linux/platform_data/omap-abe-twl6040.h>
	#include <linux/module.h>
	#include <linux/of.h>

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

	#include "omap-dmic.h"
	#include "omap-mcpdm.h"
	#include "../codecs/twl6040.h"

	struct abe_twl6040 {
	int jack_detection; /* board can detect jack events */
	int mclk_freq; /* MCLK frequency speed for twl6040 */

	struct platform_device *dmic_codec_dev;
	};

	static int omap_abe_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_card *card = codec->card;
	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);
	int clk_id, freq;
	int ret;

	clk_id = twl6040_get_clk_id(rtd->codec);
	if (clk_id == TWL6040_SYSCLK_SEL_HPPLL)
	freq = priv->mclk_freq;
	else if (clk_id == TWL6040_SYSCLK_SEL_LPPLL)
	freq = 32768;
	else
	return -EINVAL;

	/* set the codec mclk */
	ret = snd_soc_dai_set_sysclk(codec_dai, clk_id, freq,
	SND_SOC_CLOCK_IN);
	if (ret) {
	printk(KERN_ERR "can't set codec system clock\n");
	return ret;
	}
	return ret;
	}

	static struct snd_soc_ops omap_abe_ops = {
	.hw_params = omap_abe_hw_params,
	};

	static int omap_abe_dmic_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	int ret = 0;

	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_SYSCLK_PAD_CLKS,
	19200000, SND_SOC_CLOCK_IN);
	if (ret < 0) {
	printk(KERN_ERR "can't set DMIC cpu system clock\n");
	return ret;
	}
	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_ABE_DMIC_CLK, 2400000,
	SND_SOC_CLOCK_OUT);
	if (ret < 0) {
	printk(KERN_ERR "can't set DMIC output clock\n");
	return ret;
	}
	return 0;
	}

	static struct snd_soc_ops omap_abe_dmic_ops = {
	.hw_params = omap_abe_dmic_hw_params,
	};

	/* Headset jack */
	static struct snd_soc_jack hs_jack;

	/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,
	},
	};

	/* SDP4430 machine DAPM */
	static const struct snd_soc_dapm_widget twl6040_dapm_widgets[] = {
	/* Outputs */
	SND_SOC_DAPM_HP("Headset Stereophone", NULL),
	SND_SOC_DAPM_SPK("Earphone Spk", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	SND_SOC_DAPM_LINE("Line Out", NULL),
	SND_SOC_DAPM_SPK("Vibrator", NULL),

	/* Inputs */
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Main Handset Mic", NULL),
	SND_SOC_DAPM_MIC("Sub Handset Mic", NULL),
	SND_SOC_DAPM_LINE("Line In", NULL),

	/* Digital microphones */
	SND_SOC_DAPM_MIC("Digital Mic", NULL),
	};

	static const struct snd_soc_dapm_route audio_map[] = {
	/* Routings for outputs */
	{"Headset Stereophone", NULL, "HSOL"},
	{"Headset Stereophone", NULL, "HSOR"},

	{"Earphone Spk", NULL, "EP"},

	{"Ext Spk", NULL, "HFL"},
	{"Ext Spk", NULL, "HFR"},

	{"Line Out", NULL, "AUXL"},
	{"Line Out", NULL, "AUXR"},

	{"Vibrator", NULL, "VIBRAL"},
	{"Vibrator", NULL, "VIBRAR"},

	/* Routings for inputs */
	{"HSMIC", NULL, "Headset Mic"},
	{"Headset Mic", NULL, "Headset Mic Bias"},

	{"MAINMIC", NULL, "Main Handset Mic"},
	{"Main Handset Mic", NULL, "Main Mic Bias"},

	{"SUBMIC", NULL, "Sub Handset Mic"},
	{"Sub Handset Mic", NULL, "Main Mic Bias"},

	{"AFML", NULL, "Line In"},
	{"AFMR", NULL, "Line In"},
	};

	static inline void twl6040_disconnect_pin(struct snd_soc_dapm_context *dapm,
	int connected, char *pin)
	{
	if (!connected)
	snd_soc_dapm_disable_pin(dapm, pin);
	}

	static int omap_abe_twl6040_init(struct snd_soc_pcm_runtime *rtd)
	{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_card *card = codec->card;
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	struct omap_abe_twl6040_data *pdata = dev_get_platdata(card->dev);
	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);
	int hs_trim;
	int ret = 0;

	/*
	* Configure McPDM offset cancellation based on the HSOTRIM value from
	* twl6040.
	*/
	hs_trim = twl6040_get_trim_value(codec, TWL6040_TRIM_HSOTRIM);
	omap_mcpdm_configure_dn_offsets(rtd, TWL6040_HSF_TRIM_LEFT(hs_trim),
	TWL6040_HSF_TRIM_RIGHT(hs_trim));

	/* Headset jack detection only if it is supported */
	if (priv->jack_detection) {
	ret = snd_soc_jack_new(codec, "Headset Jack",
	SND_JACK_HEADSET, &hs_jack);
	if (ret)
	return ret;

	ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
	hs_jack_pins);
	twl6040_hs_jack_detect(codec, &hs_jack, SND_JACK_HEADSET);
	}

	/*
	* 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)
	return ret;

	/* Disable not connected paths if not used */
	twl6040_disconnect_pin(dapm, pdata->has_hs, "Headset Stereophone");
	twl6040_disconnect_pin(dapm, pdata->has_hf, "Ext Spk");
	twl6040_disconnect_pin(dapm, pdata->has_ep, "Earphone Spk");
	twl6040_disconnect_pin(dapm, pdata->has_aux, "Line Out");
	twl6040_disconnect_pin(dapm, pdata->has_vibra, "Vibrator");
	twl6040_disconnect_pin(dapm, pdata->has_hsmic, "Headset Mic");
	twl6040_disconnect_pin(dapm, pdata->has_mainmic, "Main Handset Mic");
	twl6040_disconnect_pin(dapm, pdata->has_submic, "Sub Handset Mic");
	twl6040_disconnect_pin(dapm, pdata->has_afm, "Line In");

	return ret;
	}

	static const struct snd_soc_dapm_route dmic_audio_map[] = {
	{"DMic", NULL, "Digital Mic"},
	{"Digital Mic", NULL, "Digital Mic1 Bias"},
	};

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

	return snd_soc_dapm_add_routes(dapm, dmic_audio_map,
	ARRAY_SIZE(dmic_audio_map));
	}

	/* Digital audio interface glue - connects codec <--> CPU */
	static struct snd_soc_dai_link abe_twl6040_dai_links[] = {
	{
	.name = "TWL6040",
	.stream_name = "TWL6040",
	.cpu_dai_name = "omap-mcpdm",
	.codec_dai_name = "twl6040-legacy",
	.platform_name = "omap-pcm-audio",
	.codec_name = "twl6040-codec",
	.init = omap_abe_twl6040_init,
	.ops = &omap_abe_ops,
	},
	{
	.name = "DMIC",
	.stream_name = "DMIC Capture",
	.cpu_dai_name = "omap-dmic",
	.codec_dai_name = "dmic-hifi",
	.platform_name = "omap-pcm-audio",
	.codec_name = "dmic-codec",
	.init = omap_abe_dmic_init,
	.ops = &omap_abe_dmic_ops,
	},
	};

	/* Audio machine driver */
	static struct snd_soc_card omap_abe_card = {
	.owner = THIS_MODULE,

	.dapm_widgets = twl6040_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(twl6040_dapm_widgets),
	.dapm_routes = audio_map,
	.num_dapm_routes = ARRAY_SIZE(audio_map),
	};

	static int omap_abe_probe(struct platform_device *pdev)
	{
	struct omap_abe_twl6040_data *pdata = dev_get_platdata(&pdev->dev);
	struct device_node *node = pdev->dev.of_node;
	struct snd_soc_card *card = &omap_abe_card;
	struct abe_twl6040 *priv;
	int num_links = 0;
	int ret = 0;

	card->dev = &pdev->dev;

	priv = devm_kzalloc(&pdev->dev, sizeof(struct abe_twl6040), GFP_KERNEL);
	if (priv == NULL)
	return -ENOMEM;

	priv->dmic_codec_dev = ERR_PTR(-EINVAL);

	if (node) {
	struct device_node *dai_node;

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

	ret = snd_soc_of_parse_audio_routing(card,
	"ti,audio-routing");
	if (ret) {
	dev_err(&pdev->dev,
	"Error while parsing DAPM routing\n");
	return ret;
	}

	dai_node = of_parse_phandle(node, "ti,mcpdm", 0);
	if (!dai_node) {
	dev_err(&pdev->dev, "McPDM node is not provided\n");
	return -EINVAL;
	}
	abe_twl6040_dai_links[0].cpu_dai_name = NULL;
	abe_twl6040_dai_links[0].cpu_of_node = dai_node;

	dai_node = of_parse_phandle(node, "ti,dmic", 0);
	if (dai_node) {
	num_links = 2;
	abe_twl6040_dai_links[1].cpu_dai_name = NULL;
	abe_twl6040_dai_links[1].cpu_of_node = dai_node;

	priv->dmic_codec_dev = platform_device_register_simple(
	"dmic-codec", -1, NULL, 0);
	if (IS_ERR(priv->dmic_codec_dev)) {
	dev_err(&pdev->dev,
	"Can't instantiate dmic-codec\n");
	return PTR_ERR(priv->dmic_codec_dev);
	}
	} else {
	num_links = 1;
	}

	priv->jack_detection = of_property_read_bool(node,
	"ti,jack-detection");
	of_property_read_u32(node, "ti,mclk-freq",
	&priv->mclk_freq);
	if (!priv->mclk_freq) {
	dev_err(&pdev->dev, "MCLK frequency not provided\n");
	ret = -EINVAL;
	goto err_unregister;
	}

	omap_abe_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->has_dmic)
	num_links = 2;
	else
	num_links = 1;

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


	if (!priv->mclk_freq) {
	dev_err(&pdev->dev, "MCLK frequency missing\n");
	ret = -ENODEV;
	goto err_unregister;
	}

	card->dai_link = abe_twl6040_dai_links;
	card->num_links = num_links;

	snd_soc_card_set_drvdata(card, priv);

	ret = snd_soc_register_card(card);
	if (ret) {
	dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
	ret);
	goto err_unregister;
	}

	return 0;

	err_unregister:
	if (!IS_ERR(priv->dmic_codec_dev))
	platform_device_unregister(priv->dmic_codec_dev);

	return ret;
	}

	static int omap_abe_remove(struct platform_device *pdev)
	{
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);

	snd_soc_unregister_card(card);

	if (!IS_ERR(priv->dmic_codec_dev))
	platform_device_unregister(priv->dmic_codec_dev);

	return 0;
	}

	static const struct of_device_id omap_abe_of_match[] = {
	{.compatible = "ti,abe-twl6040", },
	{ },
	};
	MODULE_DEVICE_TABLE(of, omap_abe_of_match);

	static struct platform_driver omap_abe_driver = {
	.driver = {
	.name = "omap-abe-twl6040",
	.owner = THIS_MODULE,
	.pm = &snd_soc_pm_ops,
	.of_match_table = omap_abe_of_match,
	},
	.probe = omap_abe_probe,
	.remove = omap_abe_remove,
	};

	module_platform_driver(omap_abe_driver);

	MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
	MODULE_DESCRIPTION("ALSA SoC for OMAP boards with ABE and twl6040 codec");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:omap-abe-twl6040");