sound/soc/sof/nocodec.c

   1 // SPDX-License-Identifier: (GPL-2.0 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 <liam.r.girdwood@linux.intel.com>
   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 };
  18
  19 static int sof_nocodec_bes_setup(struct device *dev,
  20                                  const struct snd_sof_dsp_ops *ops,
  21                                  struct snd_soc_dai_link *links,
  22                                  int link_num, struct snd_soc_card *card)
  23 {
  24         struct snd_soc_dai_link_component *dlc;
  25         int i;
  26
  27         if (!ops || !links || !card)
  28                 return -EINVAL;
  29
  30         /* set up BE dai_links */
  31         for (i = 0; i < link_num; i++) {
  32                 dlc = devm_kzalloc(dev, 3 * sizeof(*dlc), GFP_KERNEL);
  33                 if (!dlc)
  34                         return -ENOMEM;
  35
  36                 links[i].name = devm_kasprintf(dev, GFP_KERNEL,
  37                                                "NoCodec-%d", i);
  38                 if (!links[i].name)
  39                         return -ENOMEM;
  40
  41                 links[i].cpus = &dlc[0];
  42                 links[i].codecs = &dlc[1];
  43                 links[i].platforms = &dlc[2];
  44
  45                 links[i].num_cpus = 1;
  46                 links[i].num_codecs = 1;
  47                 links[i].num_platforms = 1;
  48
  49                 links[i].id = i;
  50                 links[i].no_pcm = 1;
  51                 links[i].cpus->dai_name = ops->drv[i].name;
  52                 links[i].platforms->name = dev_name(dev);
  53                 links[i].codecs->dai_name = "snd-soc-dummy-dai";
  54                 links[i].codecs->name = "snd-soc-dummy";
  55                 links[i].dpcm_playback = 1;
  56                 links[i].dpcm_capture = 1;
  57         }
  58
  59         card->dai_link = links;
  60         card->num_links = link_num;
  61
  62         return 0;
  63 }
  64
  65 int sof_nocodec_setup(struct device *dev,
  66                       const struct snd_sof_dsp_ops *ops)
  67 {
  68         struct snd_soc_dai_link *links;
  69         int ret;
  70
  71         /* create dummy BE dai_links */
  72         links = devm_kzalloc(dev, sizeof(struct snd_soc_dai_link) *
  73                              ops->num_drv, GFP_KERNEL);
  74         if (!links)
  75                 return -ENOMEM;
  76
  77         ret = sof_nocodec_bes_setup(dev, ops, links, ops->num_drv,
  78                                     &sof_nocodec_card);
  79         return ret;
  80 }
  81 EXPORT_SYMBOL(sof_nocodec_setup);
  82
  83 static int sof_nocodec_probe(struct platform_device *pdev)
  84 {
  85         struct snd_soc_card *card = &sof_nocodec_card;
  86
  87         card->dev = &pdev->dev;
  88
  89         return devm_snd_soc_register_card(&pdev->dev, card);
  90 }
  91
  92 static int sof_nocodec_remove(struct platform_device *pdev)
  93 {
  94         return 0;
  95 }
  96
  97 static struct platform_driver sof_nocodec_audio = {
  98         .probe = sof_nocodec_probe,
  99         .remove = sof_nocodec_remove,
 100         .driver = {
 101                 .name = "sof-nocodec",
 102                 .pm = &snd_soc_pm_ops,
 103         },
 104 };
 105 module_platform_driver(sof_nocodec_audio)
 106
 107 MODULE_DESCRIPTION("ASoC sof nocodec");
 108 MODULE_AUTHOR("Liam Girdwood");
 109 MODULE_LICENSE("Dual BSD/GPL");
 110 MODULE_ALIAS("platform:sof-nocodec");