Commit 2a956ec0 authored by Nicolin Chen's avatar Nicolin Chen Committed by Mark Brown
Browse files

ASoC: fsl: Add S/PDIF machine driver 



This patch implements a device-tree-only machine driver for Freescale
i.MX series Soc. It works with spdif_transmitter/spdif_receiver and
fsl_spdif.c drivers.

Signed-off-by: default avatarNicolin Chen <b42378@freescale.com>
Acked-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent f61df384

Documentation/devicetree/bindings/sound/imx-audio-spdif.txt

0 → 100644
+34 −0
Original line number Diff line number Diff line 
Freescale i.MX audio complex with S/PDIF transceiver



Required properties:



  - compatible : "fsl,imx-audio-spdif"



  - model : The user-visible name of this sound complex



  - spdif-controller : The phandle of the i.MX S/PDIF controller





Optional properties:



  - spdif-out : This is a boolean property. If present, the transmitting

    function of S/PDIF will be enabled, indicating there's a physical

    S/PDIF out connector/jack on the board or it's connecting to some

    other IP block, such as an HDMI encoder/display-controller.



  - spdif-in : This is a boolean property. If present, the receiving

    function of S/PDIF will be enabled, indicating there's a physical

    S/PDIF in connector/jack on the board.



* Note: At least one of these two properties should be set in the DT binding.





Example:



sound-spdif {

	compatible = "fsl,imx-audio-spdif";

	model = "imx-spdif";

	spdif-controller = <&spdif>;

	spdif-out;

	spdif-in;

};

sound/soc/fsl/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -193,6 +193,17 @@ config SND_SOC_IMX_SGTL5000 
	  Say Y if you want to add support for SoC audio on an i.MX board with

	  a sgtl5000 codec.



config SND_SOC_IMX_SPDIF

	tristate "SoC Audio support for i.MX boards with S/PDIF"

	select SND_SOC_IMX_PCM_DMA

	select SND_SOC_FSL_SPDIF

	select SND_SOC_FSL_UTILS

	select SND_SOC_SPDIF

	help

	  SoC Audio support for i.MX boards with S/PDIF

	  Say Y if you want to add support for SoC audio on an i.MX board with

	  a S/DPDIF.



config SND_SOC_IMX_MC13783

	tristate "SoC Audio support for I.MX boards with mc13783"

	depends on MFD_MC13783 && ARM

sound/soc/fsl/Makefile

+2 −0
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@@ -45,6 +45,7 @@ snd-soc-mx27vis-aic32x4-objs := mx27vis-aic32x4.o 
snd-soc-wm1133-ev1-objs := wm1133-ev1.o

snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o

snd-soc-imx-wm8962-objs := imx-wm8962.o

snd-soc-imx-spdif-objs :=imx-spdif.o

snd-soc-imx-mc13783-objs := imx-mc13783.o



obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
@@ -53,4 +54,5 @@ obj-$(CONFIG_SND_SOC_MX27VIS_AIC32X4) += snd-soc-mx27vis-aic32x4.o 
obj-$(CONFIG_SND_MXC_SOC_WM1133_EV1) += snd-soc-wm1133-ev1.o

obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o

obj-$(CONFIG_SND_SOC_IMX_WM8962) += snd-soc-imx-wm8962.o

obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o

obj-$(CONFIG_SND_SOC_IMX_MC13783) += snd-soc-imx-mc13783.o

sound/soc/fsl/imx-spdif.c

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+148 −0
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/*

 * Copyright (C) 2013 Freescale Semiconductor, Inc.

 *

 * The code contained herein is licensed under the GNU General Public

 * License. You may obtain a copy of the GNU General Public License

 * Version 2 or later at the following locations:

 *

 * http://www.opensource.org/licenses/gpl-license.html

 * http://www.gnu.org/copyleft/gpl.html

 */



#include <linux/module.h>

#include <linux/of_platform.h>

#include <sound/soc.h>



struct imx_spdif_data {

	struct snd_soc_dai_link dai[2];

	struct snd_soc_card card;

	struct platform_device *txdev;

	struct platform_device *rxdev;

};



static int imx_spdif_audio_probe(struct platform_device *pdev)

{

	struct device_node *spdif_np, *np = pdev->dev.of_node;

	struct imx_spdif_data *data;

	int ret = 0, num_links = 0;



	spdif_np = of_parse_phandle(np, "spdif-controller", 0);

	if (!spdif_np) {

		dev_err(&pdev->dev, "failed to find spdif-controller\n");

		ret = -EINVAL;

		goto end;

	}



	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);

	if (!data) {

		dev_err(&pdev->dev, "failed to allocate memory\n");

		ret = -ENOMEM;

		goto end;

	}



	if (of_property_read_bool(np, "spdif-out")) {

		data->dai[num_links].name = "S/PDIF TX";

		data->dai[num_links].stream_name = "S/PDIF PCM Playback";

		data->dai[num_links].codec_dai_name = "dit-hifi";

		data->dai[num_links].codec_name = "spdif-dit";

		data->dai[num_links].cpu_of_node = spdif_np;

		data->dai[num_links].platform_of_node = spdif_np;

		num_links++;



		data->txdev = platform_device_register_simple("spdif-dit", -1, NULL, 0);

		if (IS_ERR(data->txdev)) {

			ret = PTR_ERR(data->txdev);

			dev_err(&pdev->dev, "register dit failed: %d\n", ret);

			goto end;

		}

	}



	if (of_property_read_bool(np, "spdif-in")) {

		data->dai[num_links].name = "S/PDIF RX";

		data->dai[num_links].stream_name = "S/PDIF PCM Capture";

		data->dai[num_links].codec_dai_name = "dir-hifi";

		data->dai[num_links].codec_name = "spdif-dir";

		data->dai[num_links].cpu_of_node = spdif_np;

		data->dai[num_links].platform_of_node = spdif_np;

		num_links++;



		data->rxdev = platform_device_register_simple("spdif-dir", -1, NULL, 0);

		if (IS_ERR(data->rxdev)) {

			ret = PTR_ERR(data->rxdev);

			dev_err(&pdev->dev, "register dir failed: %d\n", ret);

			goto error_dit;

		}

	}



	if (!num_links) {

		dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");

		goto error_dir;

	}



	data->card.dev = &pdev->dev;

	data->card.num_links = num_links;

	data->card.dai_link = data->dai;



	ret = snd_soc_of_parse_card_name(&data->card, "model");

	if (ret)

		goto error_dir;



	ret = snd_soc_register_card(&data->card);

	if (ret) {

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

		goto error_dir;

	}



	platform_set_drvdata(pdev, data);



	goto end;



error_dir:

	if (data->rxdev)

		platform_device_unregister(data->rxdev);

error_dit:

	if (data->txdev)

		platform_device_unregister(data->txdev);

end:

	if (spdif_np)

		of_node_put(spdif_np);



	return ret;

}



static int imx_spdif_audio_remove(struct platform_device *pdev)

{

	struct imx_spdif_data *data = platform_get_drvdata(pdev);



	if (data->rxdev)

		platform_device_unregister(data->rxdev);

	if (data->txdev)

		platform_device_unregister(data->txdev);



	snd_soc_unregister_card(&data->card);



	return 0;

}



static const struct of_device_id imx_spdif_dt_ids[] = {

	{ .compatible = "fsl,imx-audio-spdif", },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids);



static struct platform_driver imx_spdif_driver = {

	.driver = {

		.name = "imx-spdif",

		.owner = THIS_MODULE,

		.of_match_table = imx_spdif_dt_ids,

	},

	.probe = imx_spdif_audio_probe,

	.remove = imx_spdif_audio_remove,

};



module_platform_driver(imx_spdif_driver);



MODULE_AUTHOR("Freescale Semiconductor, Inc.");

MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver");

MODULE_LICENSE("GPL v2");

MODULE_ALIAS("platform:imx-spdif");

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