sound/soc/ti/davinci-evm.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * ASoC driver for TI DAVINCI EVM platform
  *
  * Author:      Vladimir Barinov, <vbarinov@embeddedalley.com>
  * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.com>
  */

 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/timer.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/of_platform.h>
 #include <linux/clk.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>

 #include <asm/dma.h>
 #include <asm/mach-types.h>

 struct snd_soc_card_drvdata_davinci {
 	struct clk *mclk;
 	unsigned sysclk;
 };

 static int evm_startup(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_card *soc_card = rtd->card;
 	struct snd_soc_card_drvdata_davinci *drvdata =
 		snd_soc_card_get_drvdata(soc_card);

 	if (drvdata->mclk)
 		return clk_prepare_enable(drvdata->mclk);

 	return 0;
 }

 static void evm_shutdown(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_card *soc_card = rtd->card;
 	struct snd_soc_card_drvdata_davinci *drvdata =
 		snd_soc_card_get_drvdata(soc_card);

 	if (drvdata->mclk)
 		clk_disable_unprepare(drvdata->mclk);
 }

 static int evm_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_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_card *soc_card = rtd->card;
 	int ret = 0;
 	unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)
 			   snd_soc_card_get_drvdata(soc_card))->sysclk;

 	/* set the codec system clock */
 	ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
 	if (ret < 0)
 		return ret;

 	/* set the CPU system clock */
 	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static struct snd_soc_ops evm_ops = {
 	.startup = evm_startup,
 	.shutdown = evm_shutdown,
 	.hw_params = evm_hw_params,
 };

 /* davinci-evm machine dapm widgets */
 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
 	SND_SOC_DAPM_LINE("Line Out", NULL),
 	SND_SOC_DAPM_MIC("Mic Jack", NULL),
 	SND_SOC_DAPM_LINE("Line In", NULL),
 };

 /* davinci-evm machine audio_mapnections to the codec pins */
 static const struct snd_soc_dapm_route audio_map[] = {
 	/* Headphone connected to HPLOUT, HPROUT */
 	{"Headphone Jack", NULL, "HPLOUT"},
 	{"Headphone Jack", NULL, "HPROUT"},

 	/* Line Out connected to LLOUT, RLOUT */
 	{"Line Out", NULL, "LLOUT"},
 	{"Line Out", NULL, "RLOUT"},

 	/* Mic connected to (MIC3L | MIC3R) */
 	{"MIC3L", NULL, "Mic Bias"},
 	{"MIC3R", NULL, "Mic Bias"},
 	{"Mic Bias", NULL, "Mic Jack"},

 	/* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
 	{"LINE1L", NULL, "Line In"},
 	{"LINE2L", NULL, "Line In"},
 	{"LINE1R", NULL, "Line In"},
 	{"LINE2R", NULL, "Line In"},
 };

 /* Logic for a aic3x as connected on a davinci-evm */
 static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_card *card = rtd->card;
 	struct device_node *np = card->dev->of_node;
 	int ret;

 	/* Add davinci-evm specific widgets */
 	snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets,
 				  ARRAY_SIZE(aic3x_dapm_widgets));

 	if (np) {
 		ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");
 		if (ret)
 			return ret;
 	} else {
 		/* Set up davinci-evm specific audio path audio_map */
 		snd_soc_dapm_add_routes(&card->dapm, audio_map,
 					ARRAY_SIZE(audio_map));
 	}

 	/* not connected */
 	snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT");
 	snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM");
 	snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM");

 	return 0;
 }

 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
 SND_SOC_DAILINK_DEFS(dm6446,
 	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcbsp")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-001b",
 				      "tlv320aic3x-hifi")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcbsp")));

 static struct snd_soc_dai_link dm6446_evm_dai = {
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.init = evm_aic3x_init,
 	.ops = &evm_ops,
 	.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 		   SND_SOC_DAIFMT_IB_NF,
 	SND_SOC_DAILINK_REG(dm6446),
 };

 SND_SOC_DAILINK_DEFS(dm355,
 	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcbsp.1")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-001b",
 				      "tlv320aic3x-hifi")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcbsp.1")));

 static struct snd_soc_dai_link dm355_evm_dai = {
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.init = evm_aic3x_init,
 	.ops = &evm_ops,
 	.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 		   SND_SOC_DAIFMT_IB_NF,
 	SND_SOC_DAILINK_REG(dm355),
 };

 #ifdef CONFIG_SND_SOC_DM365_AIC3X_CODEC
 SND_SOC_DAILINK_DEFS(dm365,
 	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcbsp")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-0018",
 				      "tlv320aic3x-hifi")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcbsp")));
 #elif defined(CONFIG_SND_SOC_DM365_VOICE_CODEC)
 SND_SOC_DAILINK_DEFS(dm365,
 	DAILINK_COMP_ARRAY(COMP_CPU("davinci-vcif")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("cq93vc-codec", "cq93vc-hifi")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-vcif")));
 #endif

 static struct snd_soc_dai_link dm365_evm_dai = {
 #ifdef CONFIG_SND_SOC_DM365_AIC3X_CODEC
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.init = evm_aic3x_init,
 	.ops = &evm_ops,
 	.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 		   SND_SOC_DAIFMT_IB_NF,
 	SND_SOC_DAILINK_REG(dm365),
 #elif defined(CONFIG_SND_SOC_DM365_VOICE_CODEC)
 	.name = "Voice Codec - CQ93VC",
 	.stream_name = "CQ93",
 	SND_SOC_DAILINK_REG(dm365),
 #endif
 };

 SND_SOC_DAILINK_DEFS(dm6467_aic3x,
 	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.0")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.0-001a",
 				      "tlv320aic3x-hifi")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.0")));

 SND_SOC_DAILINK_DEFS(dm6467_spdif,
 	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.1")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("spdif_dit", "dit-hifi")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.1")));

 static struct snd_soc_dai_link dm6467_evm_dai[] = {
 	{
 		.name = "TLV320AIC3X",
 		.stream_name = "AIC3X",
 		.init = evm_aic3x_init,
 		.ops = &evm_ops,
 		.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 			   SND_SOC_DAIFMT_IB_NF,
 		SND_SOC_DAILINK_REG(dm6467_aic3x),
 	},
 	{
 		.name = "McASP",
 		.stream_name = "spdif",
 		.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 			   SND_SOC_DAIFMT_IB_NF,
 		SND_SOC_DAILINK_REG(dm6467_spdif),
 	},
 };

 SND_SOC_DAILINK_DEFS(da830,
 	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.1")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-0018",
 				      "tlv320aic3x-hifi")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.1")));

 static struct snd_soc_dai_link da830_evm_dai = {
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.init = evm_aic3x_init,
 	.ops = &evm_ops,
 	.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 		   SND_SOC_DAIFMT_IB_NF,
 	SND_SOC_DAILINK_REG(da830),
 };

 SND_SOC_DAILINK_DEFS(da850,
 	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.0")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-0018",
 				      "tlv320aic3x-hifi")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.0")));

 static struct snd_soc_dai_link da850_evm_dai = {
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.init = evm_aic3x_init,
 	.ops = &evm_ops,
 	.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 		   SND_SOC_DAIFMT_IB_NF,
 	SND_SOC_DAILINK_REG(da850),
 };

 /* davinci dm6446 evm audio machine driver */
 /*
  * ASP0 in DM6446 EVM is clocked by U55, as configured by
  * board-dm644x-evm.c using GPIOs from U18.  There are six
  * options; here we "know" we use a 48 KHz sample rate.
  */
 static struct snd_soc_card_drvdata_davinci dm6446_snd_soc_card_drvdata = {
 	.sysclk = 12288000,
 };

 static struct snd_soc_card dm6446_snd_soc_card_evm = {
 	.name = "DaVinci DM6446 EVM",
 	.owner = THIS_MODULE,
 	.dai_link = &dm6446_evm_dai,
 	.num_links = 1,
 	.drvdata = &dm6446_snd_soc_card_drvdata,
 };

 /* davinci dm355 evm audio machine driver */
 /* ASP1 on DM355 EVM is clocked by an external oscillator */
 static struct snd_soc_card_drvdata_davinci dm355_snd_soc_card_drvdata = {
 	.sysclk = 27000000,
 };

 static struct snd_soc_card dm355_snd_soc_card_evm = {
 	.name = "DaVinci DM355 EVM",
 	.owner = THIS_MODULE,
 	.dai_link = &dm355_evm_dai,
 	.num_links = 1,
 	.drvdata = &dm355_snd_soc_card_drvdata,
 };

 /* davinci dm365 evm audio machine driver */
 static struct snd_soc_card_drvdata_davinci dm365_snd_soc_card_drvdata = {
 	.sysclk = 27000000,
 };

 static struct snd_soc_card dm365_snd_soc_card_evm = {
 	.name = "DaVinci DM365 EVM",
 	.owner = THIS_MODULE,
 	.dai_link = &dm365_evm_dai,
 	.num_links = 1,
 	.drvdata = &dm365_snd_soc_card_drvdata,
 };

 /* davinci dm6467 evm audio machine driver */
 static struct snd_soc_card_drvdata_davinci dm6467_snd_soc_card_drvdata = {
 	.sysclk = 27000000,
 };

 static struct snd_soc_card dm6467_snd_soc_card_evm = {
 	.name = "DaVinci DM6467 EVM",
 	.owner = THIS_MODULE,
 	.dai_link = dm6467_evm_dai,
 	.num_links = ARRAY_SIZE(dm6467_evm_dai),
 	.drvdata = &dm6467_snd_soc_card_drvdata,
 };

 static struct snd_soc_card_drvdata_davinci da830_snd_soc_card_drvdata = {
 	.sysclk = 24576000,
 };

 static struct snd_soc_card da830_snd_soc_card = {
 	.name = "DA830/OMAP-L137 EVM",
 	.owner = THIS_MODULE,
 	.dai_link = &da830_evm_dai,
 	.num_links = 1,
 	.drvdata = &da830_snd_soc_card_drvdata,
 };

 static struct snd_soc_card_drvdata_davinci da850_snd_soc_card_drvdata = {
 	.sysclk = 24576000,
 };

 static struct snd_soc_card da850_snd_soc_card = {
 	.name = "DA850/OMAP-L138 EVM",
 	.owner = THIS_MODULE,
 	.dai_link = &da850_evm_dai,
 	.num_links = 1,
 	.drvdata = &da850_snd_soc_card_drvdata,
 };

 #if defined(CONFIG_OF)

 /*
  * The struct is used as place holder. It will be completely
  * filled with data from dt node.
  */
 SND_SOC_DAILINK_DEFS(evm,
 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
 	.name		= "TLV320AIC3X",
 	.stream_name	= "AIC3X",
 	.ops            = &evm_ops,
 	.init           = evm_aic3x_init,
 	.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
 		   SND_SOC_DAIFMT_IB_NF,
 	SND_SOC_DAILINK_REG(evm),
 };

 static const struct of_device_id davinci_evm_dt_ids[] = {
 	{
 		.compatible = "ti,da830-evm-audio",
 		.data = (void *) &evm_dai_tlv320aic3x,
 	},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);

 /* davinci evm audio machine driver */
 static struct snd_soc_card evm_soc_card = {
 	.owner = THIS_MODULE,
 	.num_links = 1,
 };

 static int davinci_evm_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	const struct of_device_id *match;
 	struct snd_soc_dai_link *dai;
 	struct snd_soc_card_drvdata_davinci *drvdata = NULL;
 	struct clk *mclk;
 	int ret = 0;

 	match = of_match_device(of_match_ptr(davinci_evm_dt_ids), &pdev->dev);
 	if (!match) {
 		dev_err(&pdev->dev, "Error: No device match found\n");
 		return -ENODEV;
 	}

 	dai = (struct snd_soc_dai_link *) match->data;

 	evm_soc_card.dai_link = dai;

 	dai->codecs->of_node = of_parse_phandle(np, "ti,audio-codec", 0);
 	if (!dai->codecs->of_node)
 		return -EINVAL;

 	dai->cpus->of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);
 	if (!dai->cpus->of_node)
 		return -EINVAL;

 	dai->platforms->of_node = dai->cpus->of_node;

 	evm_soc_card.dev = &pdev->dev;
 	ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
 	if (ret)
 		return ret;

 	mclk = devm_clk_get(&pdev->dev, "mclk");
 	if (PTR_ERR(mclk) == -EPROBE_DEFER) {
 		return -EPROBE_DEFER;
 	} else if (IS_ERR(mclk)) {
 		dev_dbg(&pdev->dev, "mclk not found.\n");
 		mclk = NULL;
 	}

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

 	drvdata->mclk = mclk;

 	ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);

 	if (ret < 0) {
 		if (!drvdata->mclk) {
 			dev_err(&pdev->dev,
 				"No clock or clock rate defined.\n");
 			return -EINVAL;
 		}
 		drvdata->sysclk = clk_get_rate(drvdata->mclk);
 	} else if (drvdata->mclk) {
 		unsigned int requestd_rate = drvdata->sysclk;
 		clk_set_rate(drvdata->mclk, drvdata->sysclk);
 		drvdata->sysclk = clk_get_rate(drvdata->mclk);
 		if (drvdata->sysclk != requestd_rate)
 			dev_warn(&pdev->dev,
 				 "Could not get requested rate %u using %u.\n",
 				 requestd_rate, drvdata->sysclk);
 	}

 	snd_soc_card_set_drvdata(&evm_soc_card, drvdata);
 	ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);

 	if (ret)
 		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);

 	return ret;
 }

 static struct platform_driver davinci_evm_driver = {
 	.probe		= davinci_evm_probe,
 	.driver		= {
 		.name	= "davinci_evm",
 		.pm	= &snd_soc_pm_ops,
 		.of_match_table = of_match_ptr(davinci_evm_dt_ids),
 	},
 };
 #endif

 static struct platform_device *evm_snd_device;

 static int __init evm_init(void)
 {
 	struct snd_soc_card *evm_snd_dev_data;
 	int index;
 	int ret;

 	/*
 	 * If dtb is there, the devices will be created dynamically.
 	 * Only register platfrom driver structure.
 	 */
 #if defined(CONFIG_OF)
 	if (of_have_populated_dt())
 		return platform_driver_register(&davinci_evm_driver);
 #endif

 	if (machine_is_davinci_evm()) {
 		evm_snd_dev_data = &dm6446_snd_soc_card_evm;
 		index = 0;
 	} else if (machine_is_davinci_dm355_evm()) {
 		evm_snd_dev_data = &dm355_snd_soc_card_evm;
 		index = 1;
 	} else if (machine_is_davinci_dm365_evm()) {
 		evm_snd_dev_data = &dm365_snd_soc_card_evm;
 		index = 0;
 	} else if (machine_is_davinci_dm6467_evm()) {
 		evm_snd_dev_data = &dm6467_snd_soc_card_evm;
 		index = 0;
 	} else if (machine_is_davinci_da830_evm()) {
 		evm_snd_dev_data = &da830_snd_soc_card;
 		index = 1;
 	} else if (machine_is_davinci_da850_evm()) {
 		evm_snd_dev_data = &da850_snd_soc_card;
 		index = 0;
 	} else
 		return -EINVAL;

 	evm_snd_device = platform_device_alloc("soc-audio", index);
 	if (!evm_snd_device)
 		return -ENOMEM;

 	platform_set_drvdata(evm_snd_device, evm_snd_dev_data);
 	ret = platform_device_add(evm_snd_device);
 	if (ret)
 		platform_device_put(evm_snd_device);

 	return ret;
 }

 static void __exit evm_exit(void)
 {
 #if defined(CONFIG_OF)
 	if (of_have_populated_dt()) {
 		platform_driver_unregister(&davinci_evm_driver);
 		return;
 	}
 #endif

 	platform_device_unregister(evm_snd_device);
 }

 module_init(evm_init);
 module_exit(evm_exit);

 MODULE_AUTHOR("Vladimir Barinov");
 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* ASoC driver for TI DAVINCI EVM platform
	*
	* Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
	* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
	*/

	#include <linux/module.h>
	#include <linux/moduleparam.h>
	#include <linux/timer.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/i2c.h>
	#include <linux/of_platform.h>
	#include <linux/clk.h>
	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/soc.h>

	#include <asm/dma.h>
	#include <asm/mach-types.h>

	struct snd_soc_card_drvdata_davinci {
	struct clk *mclk;
	unsigned sysclk;
	};

	static int evm_startup(struct snd_pcm_substream *substream)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_card *soc_card = rtd->card;
	struct snd_soc_card_drvdata_davinci *drvdata =
	snd_soc_card_get_drvdata(soc_card);

	if (drvdata->mclk)
	return clk_prepare_enable(drvdata->mclk);

	return 0;
	}

	static void evm_shutdown(struct snd_pcm_substream *substream)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_card *soc_card = rtd->card;
	struct snd_soc_card_drvdata_davinci *drvdata =
	snd_soc_card_get_drvdata(soc_card);

	if (drvdata->mclk)
	clk_disable_unprepare(drvdata->mclk);
	}

	static int evm_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_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_card *soc_card = rtd->card;
	int ret = 0;
	unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)
	snd_soc_card_get_drvdata(soc_card))->sysclk;

	/* set the codec system clock */
	ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
	if (ret < 0)
	return ret;

	/* set the CPU system clock */
	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
	if (ret < 0)
	return ret;

	return 0;
	}

	static struct snd_soc_ops evm_ops = {
	.startup = evm_startup,
	.shutdown = evm_shutdown,
	.hw_params = evm_hw_params,
	};

	/* davinci-evm machine dapm widgets */
	static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	SND_SOC_DAPM_LINE("Line Out", NULL),
	SND_SOC_DAPM_MIC("Mic Jack", NULL),
	SND_SOC_DAPM_LINE("Line In", NULL),
	};

	/* davinci-evm machine audio_mapnections to the codec pins */
	static const struct snd_soc_dapm_route audio_map[] = {
	/* Headphone connected to HPLOUT, HPROUT */
	{"Headphone Jack", NULL, "HPLOUT"},
	{"Headphone Jack", NULL, "HPROUT"},

	/* Line Out connected to LLOUT, RLOUT */
	{"Line Out", NULL, "LLOUT"},
	{"Line Out", NULL, "RLOUT"},

	/* Mic connected to (MIC3L \| MIC3R) */
	{"MIC3L", NULL, "Mic Bias"},
	{"MIC3R", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Mic Jack"},

	/* Line In connected to (LINE1L \| LINE2L), (LINE1R \| LINE2R) */
	{"LINE1L", NULL, "Line In"},
	{"LINE2L", NULL, "Line In"},
	{"LINE1R", NULL, "Line In"},
	{"LINE2R", NULL, "Line In"},
	};

	/* Logic for a aic3x as connected on a davinci-evm */
	static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
	{
	struct snd_soc_card *card = rtd->card;
	struct device_node *np = card->dev->of_node;
	int ret;

	/* Add davinci-evm specific widgets */
	snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets,
	ARRAY_SIZE(aic3x_dapm_widgets));

	if (np) {
	ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");
	if (ret)
	return ret;
	} else {
	/* Set up davinci-evm specific audio path audio_map */
	snd_soc_dapm_add_routes(&card->dapm, audio_map,
	ARRAY_SIZE(audio_map));
	}

	/* not connected */
	snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT");
	snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM");
	snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM");

	return 0;
	}

	/* davinci-evm digital audio interface glue - connects codec <--> CPU */
	SND_SOC_DAILINK_DEFS(dm6446,
	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcbsp")),
	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-001b",
	"tlv320aic3x-hifi")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcbsp")));

	static struct snd_soc_dai_link dm6446_evm_dai = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	.dai_fmt = SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_CBM_CFM \|
	SND_SOC_DAIFMT_IB_NF,
	SND_SOC_DAILINK_REG(dm6446),
	};

	SND_SOC_DAILINK_DEFS(dm355,
	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcbsp.1")),
	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-001b",
	"tlv320aic3x-hifi")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcbsp.1")));

	static struct snd_soc_dai_link dm355_evm_dai = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	.dai_fmt = SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_CBM_CFM \|
	SND_SOC_DAIFMT_IB_NF,
	SND_SOC_DAILINK_REG(dm355),
	};

	#ifdef CONFIG_SND_SOC_DM365_AIC3X_CODEC
	SND_SOC_DAILINK_DEFS(dm365,
	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcbsp")),
	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-0018",
	"tlv320aic3x-hifi")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcbsp")));
	#elif defined(CONFIG_SND_SOC_DM365_VOICE_CODEC)
	SND_SOC_DAILINK_DEFS(dm365,
	DAILINK_COMP_ARRAY(COMP_CPU("davinci-vcif")),
	DAILINK_COMP_ARRAY(COMP_CODEC("cq93vc-codec", "cq93vc-hifi")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-vcif")));
	#endif

	static struct snd_soc_dai_link dm365_evm_dai = {
	#ifdef CONFIG_SND_SOC_DM365_AIC3X_CODEC
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	.dai_fmt = SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_CBM_CFM \|
	SND_SOC_DAIFMT_IB_NF,
	SND_SOC_DAILINK_REG(dm365),
	#elif defined(CONFIG_SND_SOC_DM365_VOICE_CODEC)
	.name = "Voice Codec - CQ93VC",
	.stream_name = "CQ93",
	SND_SOC_DAILINK_REG(dm365),
	#endif
	};

	SND_SOC_DAILINK_DEFS(dm6467_aic3x,
	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.0")),
	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.0-001a",
	"tlv320aic3x-hifi")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.0")));

	SND_SOC_DAILINK_DEFS(dm6467_spdif,
	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.1")),
	DAILINK_COMP_ARRAY(COMP_CODEC("spdif_dit", "dit-hifi")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.1")));

	static struct snd_soc_dai_link dm6467_evm_dai[] = {
	{
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	.dai_fmt = SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_CBM_CFM \|
	SND_SOC_DAIFMT_IB_NF,
	SND_SOC_DAILINK_REG(dm6467_aic3x),
	},
	{
	.name = "McASP",
	.stream_name = "spdif",
	.dai_fmt = SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_CBM_CFM \|
	SND_SOC_DAIFMT_IB_NF,
	SND_SOC_DAILINK_REG(dm6467_spdif),
	},
	};

	SND_SOC_DAILINK_DEFS(da830,
	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.1")),
	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-0018",
	"tlv320aic3x-hifi")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.1")));

	static struct snd_soc_dai_link da830_evm_dai = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	.dai_fmt = SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_CBM_CFM \|
	SND_SOC_DAIFMT_IB_NF,
	SND_SOC_DAILINK_REG(da830),
	};

	SND_SOC_DAILINK_DEFS(da850,
	DAILINK_COMP_ARRAY(COMP_CPU("davinci-mcasp.0")),
	DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic3x-codec.1-0018",
	"tlv320aic3x-hifi")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("davinci-mcasp.0")));

	static struct snd_soc_dai_link da850_evm_dai = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	.dai_fmt = SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_CBM_CFM \|
	SND_SOC_DAIFMT_IB_NF,
	SND_SOC_DAILINK_REG(da850),
	};

	/* davinci dm6446 evm audio machine driver */
	/*
	* ASP0 in DM6446 EVM is clocked by U55, as configured by
	* board-dm644x-evm.c using GPIOs from U18. There are six
	* options; here we "know" we use a 48 KHz sample rate.
	*/
	static struct snd_soc_card_drvdata_davinci dm6446_snd_soc_card_drvdata = {
	.sysclk = 12288000,
	};

	static struct snd_soc_card dm6446_snd_soc_card_evm = {
	.name = "DaVinci DM6446 EVM",
	.owner = THIS_MODULE,
	.dai_link = &dm6446_evm_dai,
	.num_links = 1,
	.drvdata = &dm6446_snd_soc_card_drvdata,
	};

	/* davinci dm355 evm audio machine driver */
	/* ASP1 on DM355 EVM is clocked by an external oscillator */
	static struct snd_soc_card_drvdata_davinci dm355_snd_soc_card_drvdata = {
	.sysclk = 27000000,
	};

	static struct snd_soc_card dm355_snd_soc_card_evm = {
	.name = "DaVinci DM355 EVM",
	.owner = THIS_MODULE,
	.dai_link = &dm355_evm_dai,
	.num_links = 1,
	.drvdata = &dm355_snd_soc_card_drvdata,
	};

	/* davinci dm365 evm audio machine driver */
	static struct snd_soc_card_drvdata_davinci dm365_snd_soc_card_drvdata = {
	.sysclk = 27000000,
	};

	static struct snd_soc_card dm365_snd_soc_card_evm = {
	.name = "DaVinci DM365 EVM",
	.owner = THIS_MODULE,
	.dai_link = &dm365_evm_dai,
	.num_links = 1,
	.drvdata = &dm365_snd_soc_card_drvdata,
	};

	/* davinci dm6467 evm audio machine driver */
	static struct snd_soc_card_drvdata_davinci dm6467_snd_soc_card_drvdata = {
	.sysclk = 27000000,
	};

	static struct snd_soc_card dm6467_snd_soc_card_evm = {
	.name = "DaVinci DM6467 EVM",
	.owner = THIS_MODULE,
	.dai_link = dm6467_evm_dai,
	.num_links = ARRAY_SIZE(dm6467_evm_dai),
	.drvdata = &dm6467_snd_soc_card_drvdata,
	};

	static struct snd_soc_card_drvdata_davinci da830_snd_soc_card_drvdata = {
	.sysclk = 24576000,
	};

	static struct snd_soc_card da830_snd_soc_card = {
	.name = "DA830/OMAP-L137 EVM",
	.owner = THIS_MODULE,
	.dai_link = &da830_evm_dai,
	.num_links = 1,
	.drvdata = &da830_snd_soc_card_drvdata,
	};

	static struct snd_soc_card_drvdata_davinci da850_snd_soc_card_drvdata = {
	.sysclk = 24576000,
	};

	static struct snd_soc_card da850_snd_soc_card = {
	.name = "DA850/OMAP-L138 EVM",
	.owner = THIS_MODULE,
	.dai_link = &da850_evm_dai,
	.num_links = 1,
	.drvdata = &da850_snd_soc_card_drvdata,
	};

	#if defined(CONFIG_OF)

	/*
	* The struct is used as place holder. It will be completely
	* filled with data from dt node.
	*/
	SND_SOC_DAILINK_DEFS(evm,
	DAILINK_COMP_ARRAY(COMP_EMPTY()),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.ops = &evm_ops,
	.init = evm_aic3x_init,
	.dai_fmt = SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_CBM_CFM \|
	SND_SOC_DAIFMT_IB_NF,
	SND_SOC_DAILINK_REG(evm),
	};

	static const struct of_device_id davinci_evm_dt_ids[] = {
	{
	.compatible = "ti,da830-evm-audio",
	.data = (void *) &evm_dai_tlv320aic3x,
	},
	{ /* sentinel */ }
	};
	MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);

	/* davinci evm audio machine driver */
	static struct snd_soc_card evm_soc_card = {
	.owner = THIS_MODULE,
	.num_links = 1,
	};

	static int davinci_evm_probe(struct platform_device *pdev)
	{
	struct device_node *np = pdev->dev.of_node;
	const struct of_device_id *match;
	struct snd_soc_dai_link *dai;
	struct snd_soc_card_drvdata_davinci *drvdata = NULL;
	struct clk *mclk;
	int ret = 0;

	match = of_match_device(of_match_ptr(davinci_evm_dt_ids), &pdev->dev);
	if (!match) {
	dev_err(&pdev->dev, "Error: No device match found\n");
	return -ENODEV;
	}

	dai = (struct snd_soc_dai_link *) match->data;

	evm_soc_card.dai_link = dai;

	dai->codecs->of_node = of_parse_phandle(np, "ti,audio-codec", 0);
	if (!dai->codecs->of_node)
	return -EINVAL;

	dai->cpus->of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);
	if (!dai->cpus->of_node)
	return -EINVAL;

	dai->platforms->of_node = dai->cpus->of_node;

	evm_soc_card.dev = &pdev->dev;
	ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
	if (ret)
	return ret;

	mclk = devm_clk_get(&pdev->dev, "mclk");
	if (PTR_ERR(mclk) == -EPROBE_DEFER) {
	return -EPROBE_DEFER;
	} else if (IS_ERR(mclk)) {
	dev_dbg(&pdev->dev, "mclk not found.\n");
	mclk = NULL;
	}

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

	drvdata->mclk = mclk;

	ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);

	if (ret < 0) {
	if (!drvdata->mclk) {
	dev_err(&pdev->dev,
	"No clock or clock rate defined.\n");
	return -EINVAL;
	}
	drvdata->sysclk = clk_get_rate(drvdata->mclk);
	} else if (drvdata->mclk) {
	unsigned int requestd_rate = drvdata->sysclk;
	clk_set_rate(drvdata->mclk, drvdata->sysclk);
	drvdata->sysclk = clk_get_rate(drvdata->mclk);
	if (drvdata->sysclk != requestd_rate)
	dev_warn(&pdev->dev,
	"Could not get requested rate %u using %u.\n",
	requestd_rate, drvdata->sysclk);
	}

	snd_soc_card_set_drvdata(&evm_soc_card, drvdata);
	ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);

	if (ret)
	dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);

	return ret;
	}

	static struct platform_driver davinci_evm_driver = {
	.probe = davinci_evm_probe,
	.driver = {
	.name = "davinci_evm",
	.pm = &snd_soc_pm_ops,
	.of_match_table = of_match_ptr(davinci_evm_dt_ids),
	},
	};
	#endif

	static struct platform_device *evm_snd_device;

	static int __init evm_init(void)
	{
	struct snd_soc_card *evm_snd_dev_data;
	int index;
	int ret;

	/*
	* If dtb is there, the devices will be created dynamically.
	* Only register platfrom driver structure.
	*/
	#if defined(CONFIG_OF)
	if (of_have_populated_dt())
	return platform_driver_register(&davinci_evm_driver);
	#endif

	if (machine_is_davinci_evm()) {
	evm_snd_dev_data = &dm6446_snd_soc_card_evm;
	index = 0;
	} else if (machine_is_davinci_dm355_evm()) {
	evm_snd_dev_data = &dm355_snd_soc_card_evm;
	index = 1;
	} else if (machine_is_davinci_dm365_evm()) {
	evm_snd_dev_data = &dm365_snd_soc_card_evm;
	index = 0;
	} else if (machine_is_davinci_dm6467_evm()) {
	evm_snd_dev_data = &dm6467_snd_soc_card_evm;
	index = 0;
	} else if (machine_is_davinci_da830_evm()) {
	evm_snd_dev_data = &da830_snd_soc_card;
	index = 1;
	} else if (machine_is_davinci_da850_evm()) {
	evm_snd_dev_data = &da850_snd_soc_card;
	index = 0;
	} else
	return -EINVAL;

	evm_snd_device = platform_device_alloc("soc-audio", index);
	if (!evm_snd_device)
	return -ENOMEM;

	platform_set_drvdata(evm_snd_device, evm_snd_dev_data);
	ret = platform_device_add(evm_snd_device);
	if (ret)
	platform_device_put(evm_snd_device);

	return ret;
	}

	static void __exit evm_exit(void)
	{
	#if defined(CONFIG_OF)
	if (of_have_populated_dt()) {
	platform_driver_unregister(&davinci_evm_driver);
	return;
	}
	#endif

	platform_device_unregister(evm_snd_device);
	}

	module_init(evm_init);
	module_exit(evm_exit);

	MODULE_AUTHOR("Vladimir Barinov");
	MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
	MODULE_LICENSE("GPL");