From: Marcus Cooper codekipper@gmail.com
Signed-off-by: Marcus Cooper codekipper@gmail.com --- sound/soc/sunxi/sunxi-machine-spdif.c | 108 ++++++++++++++++++++++++++++++++++ 1 file changed, 108 insertions(+) create mode 100644 sound/soc/sunxi/sunxi-machine-spdif.c
diff --git a/sound/soc/sunxi/sunxi-machine-spdif.c b/sound/soc/sunxi/sunxi-machine-spdif.c new file mode 100644 index 0000000..2adb727 --- /dev/null +++ b/sound/soc/sunxi/sunxi-machine-spdif.c @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2015 Andrea Venturi be17068@iperbole.bo.it + * From code by (C) 2013 Freescale Semiconductor, Inc. + * (sound/soc/fsl/imx-spdif.c) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/of_platform.h> +#include <sound/soc.h> + +struct sunxi_machine_spdif_data { + struct snd_soc_dai_link dai; + struct snd_soc_card card; +}; + +static int sunxi_machine_spdif_audio_probe(struct platform_device *pdev) +{ + struct device_node *spdif_np, *np = pdev->dev.of_node; + struct sunxi_machine_spdif_data *data; + int ret = 0; + + dev_dbg(&pdev->dev, "%s: Looking for spdif-controller\n", __func__); + 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) { + dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret); + goto end; + } + + platform_set_drvdata(pdev, data); + +end: + of_node_put(spdif_np); + + return ret; +} + +static const struct of_device_id sunxi_machine_spdif_dt_ids[] = { + { .compatible = "allwinner,sunxi-audio-spdif", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, sunxi_machine_spdif_dt_ids); + +static struct platform_driver sunxi_machine_spdif_driver = { + .driver = { + .name = "sunxi-machine-spdif", + .of_match_table = sunxi_machine_spdif_dt_ids, + }, + .probe = sunxi_machine_spdif_audio_probe, +}; + +module_platform_driver(sunxi_machine_spdif_driver); + +MODULE_AUTHOR("Marcus Cooper codekipper@gmail.com"); +MODULE_AUTHOR("Andrea Venturi, be17068@iperbole.bo.it"); +MODULE_DESCRIPTION("Allwinner sunxi S/PDIF machine driver"); +MODULE_LICENSE("GPL v2");