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 <liam.r.girdwood@linux.intel.com>
   9 //
  10
  11 #include <linux/module.h>
  12 #include <sound/sof.h>
  13 #include "sof-audio.h"
  14 #include "sof-priv.h"
  15
  16 static struct snd_soc_card sof_nocodec_card = {
  17         .name = "nocodec", /* the sof- prefix is added by the core */
  18         .topology_shortname = "sof-nocodec",
  19         .owner = THIS_MODULE
  20 };
  21
  22 static int sof_nocodec_bes_setup(struct device *dev,
  23                                  const struct snd_sof_dsp_ops *ops,
  24                                  struct snd_soc_dai_link *links,
  25                                  int link_num, struct snd_soc_card *card,
  26                                  int (*pcm_dai_link_fixup)(struct snd_soc_pcm_runtime *rtd,
  27                                                            struct snd_pcm_hw_params *params))
  28 {
  29         struct snd_soc_dai_link_component *dlc;
  30         int i;
  31
  32         if (!ops || !links || !card)
  33                 return -EINVAL;
  34
  35         /* set up BE dai_links */
  36         for (i = 0; i < link_num; i++) {
  37                 dlc = devm_kzalloc(dev, 3 * sizeof(*dlc), GFP_KERNEL);
  38                 if (!dlc)
  39                         return -ENOMEM;
  40
  41                 links[i].name = devm_kasprintf(dev, GFP_KERNEL,
  42                                                "NoCodec-%d", i);
  43                 if (!links[i].name)
  44                         return -ENOMEM;
  45
  46                 links[i].stream_name = links[i].name;
  47
  48                 links[i].cpus = &dlc[0];
  49                 links[i].codecs = &dlc[1];
  50                 links[i].platforms = &dlc[2];
  51
  52                 links[i].num_cpus = 1;
  53                 links[i].num_codecs = 1;
  54                 links[i].num_platforms = 1;
  55
  56                 links[i].id = i;
  57                 links[i].no_pcm = 1;
  58                 links[i].cpus->dai_name = ops->drv[i].name;
  59                 links[i].platforms->name = dev_name(dev);
  60                 links[i].codecs->dai_name = "snd-soc-dummy-dai";
  61                 links[i].codecs->name = "snd-soc-dummy";
  62                 if (ops->drv[i].playback.channels_min)
  63                         links[i].dpcm_playback = 1;
  64                 if (ops->drv[i].capture.channels_min)
  65                         links[i].dpcm_capture = 1;
  66
  67                 links[i].be_hw_params_fixup = pcm_dai_link_fixup;
  68         }
  69
  70         card->dai_link = links;
  71         card->num_links = link_num;
  72
  73         return 0;
  74 }
  75
  76 int sof_nocodec_setup(struct device *dev, const struct snd_sof_dsp_ops *ops,
  77                       int (*pcm_dai_link_fixup)(struct snd_soc_pcm_runtime *rtd,
  78                                                 struct snd_pcm_hw_params *params))
  79 {
  80         struct snd_soc_dai_link *links;
  81
  82         /* create dummy BE dai_links */
  83         links = devm_kzalloc(dev, sizeof(struct snd_soc_dai_link) *
  84                              ops->num_drv, GFP_KERNEL);
  85         if (!links)
  86                 return -ENOMEM;
  87
  88         return sof_nocodec_bes_setup(dev, ops, links, ops->num_drv,
  89                                      &sof_nocodec_card, pcm_dai_link_fixup);
  90 }
  91 EXPORT_SYMBOL(sof_nocodec_setup);
  92
  93 static int sof_nocodec_probe(struct platform_device *pdev)
  94 {
  95         struct snd_soc_card *card = &sof_nocodec_card;
  96
  97         card->dev = &pdev->dev;
  98         card->topology_shortname_created = true;
  99
 100         return devm_snd_soc_register_card(&pdev->dev, card);
 101 }
 102
 103 static int sof_nocodec_remove(struct platform_device *pdev)
 104 {
 105         return 0;
 106 }
 107
 108 static struct platform_driver sof_nocodec_audio = {
 109         .probe = sof_nocodec_probe,
 110         .remove = sof_nocodec_remove,
 111         .driver = {
 112                 .name = "sof-nocodec",
 113                 .pm = &snd_soc_pm_ops,
 114         },
 115 };
 116 module_platform_driver(sof_nocodec_audio)
 117
 118 MODULE_DESCRIPTION("ASoC sof nocodec");
 119 MODULE_AUTHOR("Liam Girdwood");
 120 MODULE_LICENSE("Dual BSD/GPL");
 121 MODULE_ALIAS("platform:sof-nocodec");