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

// SPDX-License-Identifier: GPL-2.0+
//
// Copyright (C) 2013 Freescale Semiconductor, Inc.

#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;
	data->card.owner = THIS_MODULE;

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

end:
	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",
		.pm = &snd_soc_pm_ops,
		.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
58dbd101 AD	1	// SPDX-License-Identifier: GPL-2.0+
	2	//
	3	// Copyright (C) 2013 Freescale Semiconductor, Inc.
2a956ec0 NC	4
	5	#include <linux/module.h>
	6	#include <linux/of_platform.h>
	7	#include <sound/soc.h>
	8
	9	struct imx_spdif_data {
14c3aa98	10	struct snd_soc_dai_link dai;
2a956ec0	11	struct snd_soc_card card;
2a956ec0 NC	12	};
	13
	14	static int imx_spdif_audio_probe(struct platform_device *pdev)
	15	{
	16	struct device_node spdif_np, np = pdev->dev.of_node;
	17	struct imx_spdif_data *data;
14c3aa98	18	int ret = 0;
2a956ec0 NC	19
	20	spdif_np = of_parse_phandle(np, "spdif-controller", 0);
	21	if (!spdif_np) {
	22	dev_err(&pdev->dev, "failed to find spdif-controller\n");
	23	ret = -EINVAL;
	24	goto end;
	25	}
	26
	27	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	28	if (!data) {
2a956ec0 NC	29	ret = -ENOMEM;
	30	goto end;
	31	}
	32
14c3aa98 NC	33	data->dai.name = "S/PDIF PCM";
	34	data->dai.stream_name = "S/PDIF PCM";
	35	data->dai.codec_dai_name = "snd-soc-dummy-dai";
	36	data->dai.codec_name = "snd-soc-dummy";
	37	data->dai.cpu_of_node = spdif_np;
	38	data->dai.platform_of_node = spdif_np;
	39	data->dai.playback_only = true;
	40	data->dai.capture_only = true;
2a956ec0	41
14c3aa98 NC	42	if (of_property_read_bool(np, "spdif-out"))
	43	data->dai.capture_only = false;
	44
	45	if (of_property_read_bool(np, "spdif-in"))
	46	data->dai.playback_only = false;
2a956ec0	47
14c3aa98	48	if (data->dai.playback_only && data->dai.capture_only) {
2a956ec0	49	dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
14c3aa98	50	goto end;
2a956ec0 NC	51	}
	52
	53	data->card.dev = &pdev->dev;
14c3aa98 NC	54	data->card.dai_link = &data->dai;
14c3aa98 NC	55	data->card.num_links = 1;
7a3a9070	56	data->card.owner = THIS_MODULE;
2a956ec0 NC	57
	58	ret = snd_soc_of_parse_card_name(&data->card, "model");
	59	if (ret)
14c3aa98	60	goto end;
2a956ec0	61
ff27d9b3	62	ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
2363d85f	63	if (ret && ret != -EPROBE_DEFER)
2a956ec0	64	dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
2a956ec0	65
2a956ec0	66	end:
aa4ac920	67	of_node_put(spdif_np);
2a956ec0 NC	68
	69	return ret;
	70	}
	71
2a956ec0 NC	72	static const struct of_device_id imx_spdif_dt_ids[] = {
	73	{ .compatible = "fsl,imx-audio-spdif", },
	74	{ /* sentinel */ }
	75	};
	76	MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids);
	77
	78	static struct platform_driver imx_spdif_driver = {
	79	.driver = {
	80	.name = "imx-spdif",
43ac9469	81	.pm = &snd_soc_pm_ops,
2a956ec0 NC	82	.of_match_table = imx_spdif_dt_ids,
	83	},
	84	.probe = imx_spdif_audio_probe,
2a956ec0 NC	85	};
	86
	87	module_platform_driver(imx_spdif_driver);
	88
	89	MODULE_AUTHOR("Freescale Semiconductor, Inc.");
	90	MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver");
	91	MODULE_LICENSE("GPL v2");
	92	MODULE_ALIAS("platform:imx-spdif");