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: Nicolin Chen <b42378@freescale.com> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Nicolin Chen
148
sound/soc/fsl/imx-spdif.c
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148
sound/soc/fsl/imx-spdif.c
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@@ -0,0 +1,148 @@
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/*
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* Copyright (C) 2013 Freescale Semiconductor, Inc.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <sound/soc.h>
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struct imx_spdif_data {
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struct snd_soc_dai_link dai[2];
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struct snd_soc_card card;
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struct platform_device *txdev;
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struct platform_device *rxdev;
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};
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static int imx_spdif_audio_probe(struct platform_device *pdev)
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{
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struct device_node *spdif_np, *np = pdev->dev.of_node;
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struct imx_spdif_data *data;
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int ret = 0, num_links = 0;
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spdif_np = of_parse_phandle(np, "spdif-controller", 0);
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if (!spdif_np) {
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dev_err(&pdev->dev, "failed to find spdif-controller\n");
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ret = -EINVAL;
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goto end;
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}
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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if (!data) {
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dev_err(&pdev->dev, "failed to allocate memory\n");
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ret = -ENOMEM;
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goto end;
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}
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if (of_property_read_bool(np, "spdif-out")) {
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data->dai[num_links].name = "S/PDIF TX";
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data->dai[num_links].stream_name = "S/PDIF PCM Playback";
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data->dai[num_links].codec_dai_name = "dit-hifi";
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data->dai[num_links].codec_name = "spdif-dit";
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data->dai[num_links].cpu_of_node = spdif_np;
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data->dai[num_links].platform_of_node = spdif_np;
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num_links++;
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data->txdev = platform_device_register_simple("spdif-dit", -1, NULL, 0);
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if (IS_ERR(data->txdev)) {
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ret = PTR_ERR(data->txdev);
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dev_err(&pdev->dev, "register dit failed: %d\n", ret);
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goto end;
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}
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}
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if (of_property_read_bool(np, "spdif-in")) {
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data->dai[num_links].name = "S/PDIF RX";
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data->dai[num_links].stream_name = "S/PDIF PCM Capture";
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data->dai[num_links].codec_dai_name = "dir-hifi";
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data->dai[num_links].codec_name = "spdif-dir";
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data->dai[num_links].cpu_of_node = spdif_np;
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data->dai[num_links].platform_of_node = spdif_np;
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num_links++;
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data->rxdev = platform_device_register_simple("spdif-dir", -1, NULL, 0);
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if (IS_ERR(data->rxdev)) {
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ret = PTR_ERR(data->rxdev);
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dev_err(&pdev->dev, "register dir failed: %d\n", ret);
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goto error_dit;
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}
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}
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if (!num_links) {
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dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
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goto error_dir;
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}
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data->card.dev = &pdev->dev;
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data->card.num_links = num_links;
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data->card.dai_link = data->dai;
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ret = snd_soc_of_parse_card_name(&data->card, "model");
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if (ret)
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goto error_dir;
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ret = snd_soc_register_card(&data->card);
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if (ret) {
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dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
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goto error_dir;
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}
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platform_set_drvdata(pdev, data);
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goto end;
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error_dir:
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if (data->rxdev)
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platform_device_unregister(data->rxdev);
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error_dit:
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if (data->txdev)
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platform_device_unregister(data->txdev);
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end:
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if (spdif_np)
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of_node_put(spdif_np);
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return ret;
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}
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static int imx_spdif_audio_remove(struct platform_device *pdev)
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{
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struct imx_spdif_data *data = platform_get_drvdata(pdev);
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if (data->rxdev)
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platform_device_unregister(data->rxdev);
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if (data->txdev)
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platform_device_unregister(data->txdev);
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snd_soc_unregister_card(&data->card);
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return 0;
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}
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static const struct of_device_id imx_spdif_dt_ids[] = {
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{ .compatible = "fsl,imx-audio-spdif", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids);
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static struct platform_driver imx_spdif_driver = {
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.driver = {
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.name = "imx-spdif",
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.owner = THIS_MODULE,
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.of_match_table = imx_spdif_dt_ids,
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},
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.probe = imx_spdif_audio_probe,
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.remove = imx_spdif_audio_remove,
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};
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module_platform_driver(imx_spdif_driver);
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MODULE_AUTHOR("Freescale Semiconductor, Inc.");
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MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:imx-spdif");
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