[linux-2.6-block.git] / sound / soc / fsl / imx-spdif.c

/*
 * 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;
	struct snd_soc_card card;
};

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;

	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) {
		ret = -ENOMEM;
		goto end;
	}

	data->dai.name = "S/PDIF PCM";
	data->dai.stream_name = "S/PDIF PCM";
	data->dai.codec_dai_name = "snd-soc-dummy-dai";
	data->dai.codec_name = "snd-soc-dummy";
	data->dai.cpu_of_node = spdif_np;
	data->dai.platform_of_node = spdif_np;
	data->dai.playback_only = true;
	data->dai.capture_only = true;

	if (of_property_read_bool(np, "spdif-out"))
		data->dai.capture_only = false;

	if (of_property_read_bool(np, "spdif-in"))
		data->dai.playback_only = false;

	if (data->dai.playback_only && data->dai.capture_only) {
		dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
		goto end;
	}

	data->card.dev = &pdev->dev;
	data->card.dai_link = &data->dai;
	data->card.num_links = 1;

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

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

	platform_set_drvdata(pdev, data);

end:
	if (spdif_np)
		of_node_put(spdif_np);

	return ret;
}

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,
};

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");
Commit	Line	Data
2a956ec0 NC	1	/*
	2	* Copyright (C) 2013 Freescale Semiconductor, Inc.
	3	*
	4	* The code contained herein is licensed under the GNU General Public
	5	* License. You may obtain a copy of the GNU General Public License
	6	* Version 2 or later at the following locations:
	7	*
	8	* http://www.opensource.org/licenses/gpl-license.html
	9	* http://www.gnu.org/copyleft/gpl.html
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/of_platform.h>
	14	#include <sound/soc.h>
	15
	16	struct imx_spdif_data {
14c3aa98	17	struct snd_soc_dai_link dai;
2a956ec0	18	struct snd_soc_card card;
2a956ec0 NC	19	};
	20
	21	static int imx_spdif_audio_probe(struct platform_device *pdev)
	22	{
	23	struct device_node spdif_np, np = pdev->dev.of_node;
	24	struct imx_spdif_data *data;
14c3aa98	25	int ret = 0;
2a956ec0 NC	26
	27	spdif_np = of_parse_phandle(np, "spdif-controller", 0);
	28	if (!spdif_np) {
	29	dev_err(&pdev->dev, "failed to find spdif-controller\n");
	30	ret = -EINVAL;
	31	goto end;
	32	}
	33
	34	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	35	if (!data) {
2a956ec0 NC	36	ret = -ENOMEM;
	37	goto end;
	38	}
	39
14c3aa98 NC	40	data->dai.name = "S/PDIF PCM";
	41	data->dai.stream_name = "S/PDIF PCM";
	42	data->dai.codec_dai_name = "snd-soc-dummy-dai";
	43	data->dai.codec_name = "snd-soc-dummy";
	44	data->dai.cpu_of_node = spdif_np;
	45	data->dai.platform_of_node = spdif_np;
	46	data->dai.playback_only = true;
	47	data->dai.capture_only = true;
2a956ec0	48
14c3aa98 NC	49	if (of_property_read_bool(np, "spdif-out"))
	50	data->dai.capture_only = false;
	51
	52	if (of_property_read_bool(np, "spdif-in"))
	53	data->dai.playback_only = false;
2a956ec0	54
14c3aa98	55	if (data->dai.playback_only && data->dai.capture_only) {
2a956ec0	56	dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
14c3aa98	57	goto end;
2a956ec0 NC	58	}
	59
	60	data->card.dev = &pdev->dev;
14c3aa98 NC	61	data->card.dai_link = &data->dai;
14c3aa98 NC	62	data->card.num_links = 1;
2a956ec0 NC	63
	64	ret = snd_soc_of_parse_card_name(&data->card, "model");
	65	if (ret)
14c3aa98	66	goto end;
2a956ec0	67
ff27d9b3	68	ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
2a956ec0 NC	69	if (ret) {
2a956ec0 NC	70	dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
14c3aa98	71	goto end;
2a956ec0 NC	72	}
	73
	74	platform_set_drvdata(pdev, data);
	75
2a956ec0 NC	76	end:
	77	if (spdif_np)
	78	of_node_put(spdif_np);
	79
	80	return ret;
	81	}
	82
2a956ec0 NC	83	static const struct of_device_id imx_spdif_dt_ids[] = {
	84	{ .compatible = "fsl,imx-audio-spdif", },
	85	{ /* sentinel */ }
	86	};
	87	MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids);
	88
	89	static struct platform_driver imx_spdif_driver = {
	90	.driver = {
	91	.name = "imx-spdif",
	92	.owner = THIS_MODULE,
	93	.of_match_table = imx_spdif_dt_ids,
	94	},
	95	.probe = imx_spdif_audio_probe,
2a956ec0 NC	96	};
	97
	98	module_platform_driver(imx_spdif_driver);
	99
	100	MODULE_AUTHOR("Freescale Semiconductor, Inc.");
	101	MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver");
	102	MODULE_LICENSE("GPL v2");
	103	MODULE_ALIAS("platform:imx-spdif");