sound/soc/sof/nocodec.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 //
   3 // This file is provided under a dual BSD/GPLv2 license.  When using or
   4 // redistributing this file, you may do so under either license.
   5 //
   6 // Copyright(c) 2018 Intel Corporation. All rights reserved.
   7 //
   8 // Author: Liam Girdwood <[email protected]>
   9 //
  10
  11 #include <linux/module.h>
  12 #include <sound/sof.h>
  13 #include "sof-priv.h"
  14
  15 static struct snd_soc_card sof_nocodec_card = {
  16         .name = "nocodec", /* the sof- prefix is added by the core */
  17         .owner = THIS_MODULE
  18 };
  19
  20 static int sof_nocodec_bes_setup(struct device *dev,
  21                                  const struct snd_sof_dsp_ops *ops,
  22                                  struct snd_soc_dai_link *links,
  23                                  int link_num, struct snd_soc_card *card)
  24 {
  25         struct snd_soc_dai_link_component *dlc;
  26         int i;
  27
  28         if (!ops || !links || !card)
  29                 return -EINVAL;
  30
  31         /* set up BE dai_links */
  32         for (i = 0; i < link_num; i++) {
  33                 dlc = devm_kzalloc(dev, 3 * sizeof(*dlc), GFP_KERNEL);
  34                 if (!dlc)
  35                         return -ENOMEM;
  36
  37                 links[i].name = devm_kasprintf(dev, GFP_KERNEL,
  38                                                "NoCodec-%d", i);
  39                 if (!links[i].name)
  40                         return -ENOMEM;
  41
  42                 links[i].cpus = &dlc[0];
  43                 links[i].codecs = &dlc[1];
  44                 links[i].platforms = &dlc[2];
  45
  46                 links[i].num_cpus = 1;
  47                 links[i].num_codecs = 1;
  48                 links[i].num_platforms = 1;
  49
  50                 links[i].id = i;
  51                 links[i].no_pcm = 1;
  52                 links[i].cpus->dai_name = ops->drv[i].name;
  53                 links[i].platforms->name = dev_name(dev);
  54                 links[i].codecs->dai_name = "snd-soc-dummy-dai";
  55                 links[i].codecs->name = "snd-soc-dummy";
  56                 if (ops->drv[i].playback.channels_min)
  57                         links[i].dpcm_playback = 1;
  58                 if (ops->drv[i].capture.channels_min)
  59                         links[i].dpcm_capture = 1;
  60         }
  61
  62         card->dai_link = links;
  63         card->num_links = link_num;
  64
  65         return 0;
  66 }
  67
  68 int sof_nocodec_setup(struct device *dev,
  69                       const struct snd_sof_dsp_ops *ops)
  70 {
  71         struct snd_soc_dai_link *links;
  72
  73         /* create dummy BE dai_links */
  74         links = devm_kzalloc(dev, sizeof(struct snd_soc_dai_link) *
  75                              ops->num_drv, GFP_KERNEL);
  76         if (!links)
  77                 return -ENOMEM;
  78
  79         return sof_nocodec_bes_setup(dev, ops, links, ops->num_drv,
  80                                      &sof_nocodec_card);
  81 }
  82 EXPORT_SYMBOL(sof_nocodec_setup);
  83
  84 static int sof_nocodec_probe(struct platform_device *pdev)
  85 {
  86         struct snd_soc_card *card = &sof_nocodec_card;
  87
  88         card->dev = &pdev->dev;
  89
  90         return devm_snd_soc_register_card(&pdev->dev, card);
  91 }
  92
  93 static int sof_nocodec_remove(struct platform_device *pdev)
  94 {
  95         return 0;
  96 }
  97
  98 static struct platform_driver sof_nocodec_audio = {
  99         .probe = sof_nocodec_probe,
 100         .remove = sof_nocodec_remove,
 101         .driver = {
 102                 .name = "sof-nocodec",
 103                 .pm = &snd_soc_pm_ops,
 104         },
 105 };
 106 module_platform_driver(sof_nocodec_audio)
 107
 108 MODULE_DESCRIPTION("ASoC sof nocodec");
 109 MODULE_AUTHOR("Liam Girdwood");
 110 MODULE_LICENSE("Dual BSD/GPL");
 111 MODULE_ALIAS("platform:sof-nocodec");