Pileus Git - ~andy/linux/blob - sound/soc/fsl/imx-spdif.c

   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 {
  17         struct snd_soc_dai_link dai[2];
  18         struct snd_soc_card card;
  19         struct platform_device *txdev;
  20         struct platform_device *rxdev;
  21 };
  22
  23 static int imx_spdif_audio_probe(struct platform_device *pdev)
  24 {
  25         struct device_node *spdif_np, *np = pdev->dev.of_node;
  26         struct imx_spdif_data *data;
  27         int ret = 0, num_links = 0;
  28
  29         spdif_np = of_parse_phandle(np, "spdif-controller", 0);
  30         if (!spdif_np) {
  31                 dev_err(&pdev->dev, "failed to find spdif-controller\n");
  32                 ret = -EINVAL;
  33                 goto end;
  34         }
  35
  36         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
  37         if (!data) {
  38                 ret = -ENOMEM;
  39                 goto end;
  40         }
  41
  42         if (of_property_read_bool(np, "spdif-out")) {
  43                 data->dai[num_links].name = "S/PDIF TX";
  44                 data->dai[num_links].stream_name = "S/PDIF PCM Playback";
  45                 data->dai[num_links].codec_dai_name = "dit-hifi";
  46                 data->dai[num_links].codec_name = "spdif-dit";
  47                 data->dai[num_links].cpu_of_node = spdif_np;
  48                 data->dai[num_links].platform_of_node = spdif_np;
  49                 num_links++;
  50
  51                 data->txdev = platform_device_register_simple("spdif-dit", -1, NULL, 0);
  52                 if (IS_ERR(data->txdev)) {
  53                         ret = PTR_ERR(data->txdev);
  54                         dev_err(&pdev->dev, "register dit failed: %d\n", ret);
  55                         goto end;
  56                 }
  57         }
  58
  59         if (of_property_read_bool(np, "spdif-in")) {
  60                 data->dai[num_links].name = "S/PDIF RX";
  61                 data->dai[num_links].stream_name = "S/PDIF PCM Capture";
  62                 data->dai[num_links].codec_dai_name = "dir-hifi";
  63                 data->dai[num_links].codec_name = "spdif-dir";
  64                 data->dai[num_links].cpu_of_node = spdif_np;
  65                 data->dai[num_links].platform_of_node = spdif_np;
  66                 num_links++;
  67
  68                 data->rxdev = platform_device_register_simple("spdif-dir", -1, NULL, 0);
  69                 if (IS_ERR(data->rxdev)) {
  70                         ret = PTR_ERR(data->rxdev);
  71                         dev_err(&pdev->dev, "register dir failed: %d\n", ret);
  72                         goto error_dit;
  73                 }
  74         }
  75
  76         if (!num_links) {
  77                 dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
  78                 goto error_dir;
  79         }
  80
  81         data->card.dev = &pdev->dev;
  82         data->card.num_links = num_links;
  83         data->card.dai_link = data->dai;
  84
  85         ret = snd_soc_of_parse_card_name(&data->card, "model");
  86         if (ret)
  87                 goto error_dir;
  88
  89         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
  90         if (ret) {
  91                 dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
  92                 goto error_dir;
  93         }
  94
  95         platform_set_drvdata(pdev, data);
  96
  97         goto end;
  98
  99 error_dir:
 100         if (data->rxdev)
 101                 platform_device_unregister(data->rxdev);
 102 error_dit:
 103         if (data->txdev)
 104                 platform_device_unregister(data->txdev);
 105 end:
 106         if (spdif_np)
 107                 of_node_put(spdif_np);
 108
 109         return ret;
 110 }
 111
 112 static int imx_spdif_audio_remove(struct platform_device *pdev)
 113 {
 114         struct imx_spdif_data *data = platform_get_drvdata(pdev);
 115
 116         if (data->rxdev)
 117                 platform_device_unregister(data->rxdev);
 118         if (data->txdev)
 119                 platform_device_unregister(data->txdev);
 120
 121         return 0;
 122 }
 123
 124 static const struct of_device_id imx_spdif_dt_ids[] = {
 125         { .compatible = "fsl,imx-audio-spdif", },
 126         { /* sentinel */ }
 127 };
 128 MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids);
 129
 130 static struct platform_driver imx_spdif_driver = {
 131         .driver = {
 132                 .name = "imx-spdif",
 133                 .owner = THIS_MODULE,
 134                 .of_match_table = imx_spdif_dt_ids,
 135         },
 136         .probe = imx_spdif_audio_probe,
 137         .remove = imx_spdif_audio_remove,
 138 };
 139
 140 module_platform_driver(imx_spdif_driver);
 141
 142 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 143 MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver");
 144 MODULE_LICENSE("GPL v2");
 145 MODULE_ALIAS("platform:imx-spdif");