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                                  struct snd_soc_dai_driver *drv,
  24                                  struct snd_soc_dai_link *links,
  25                                  int link_num, struct snd_soc_card *card)
  26 {
  27         struct snd_soc_dai_link_component *dlc;
  28         int i;
  29
  30         if (!drv || !links || !card)
  31                 return -EINVAL;
  32
  33         /* set up BE dai_links */
  34         for (i = 0; i < link_num; i++) {
  35                 dlc = devm_kcalloc(dev, 3, sizeof(*dlc), GFP_KERNEL);
  36                 if (!dlc)
  37                         return -ENOMEM;
  38
  39                 links[i].name = devm_kasprintf(dev, GFP_KERNEL,
  40                                                "NoCodec-%d", i);
  41                 if (!links[i].name)
  42                         return -ENOMEM;
  43
  44                 links[i].stream_name = links[i].name;
  45
  46                 links[i].cpus = &dlc[0];
  47                 links[i].codecs = &dlc[1];
  48                 links[i].platforms = &dlc[2];
  49
  50                 links[i].num_cpus = 1;
  51                 links[i].num_codecs = 1;
  52                 links[i].num_platforms = 1;
  53
  54                 links[i].id = i;
  55                 links[i].no_pcm = 1;
  56                 links[i].cpus->dai_name = drv[i].name;
  57                 links[i].platforms->name = dev_name(dev->parent);
  58                 links[i].codecs->dai_name = "snd-soc-dummy-dai";
  59                 links[i].codecs->name = "snd-soc-dummy";
  60                 if (drv[i].playback.channels_min)
  61                         links[i].dpcm_playback = 1;
  62                 if (drv[i].capture.channels_min)
  63                         links[i].dpcm_capture = 1;
  64
  65                 links[i].be_hw_params_fixup = sof_pcm_dai_link_fixup;
  66         }
  67
  68         card->dai_link = links;
  69         card->num_links = link_num;
  70
  71         return 0;
  72 }
  73
  74 static int sof_nocodec_setup(struct device *dev,
  75                              u32 num_dai_drivers,
  76                              struct snd_soc_dai_driver *dai_drivers)
  77 {
  78         struct snd_soc_dai_link *links;
  79
  80         /* create dummy BE dai_links */
  81         links = devm_kcalloc(dev, num_dai_drivers, sizeof(struct snd_soc_dai_link), GFP_KERNEL);
  82         if (!links)
  83                 return -ENOMEM;
  84
  85         return sof_nocodec_bes_setup(dev, dai_drivers, links, num_dai_drivers, &sof_nocodec_card);
  86 }
  87
  88 static int sof_nocodec_probe(struct platform_device *pdev)
  89 {
  90         struct snd_soc_card *card = &sof_nocodec_card;
  91         struct snd_soc_acpi_mach *mach;
  92         int ret;
  93
  94         card->dev = &pdev->dev;
  95         card->topology_shortname_created = true;
  96         mach = pdev->dev.platform_data;
  97
  98         ret = sof_nocodec_setup(card->dev, mach->mach_params.num_dai_drivers,
  99                                 mach->mach_params.dai_drivers);
 100         if (ret < 0)
 101                 return ret;
 102
 103         return devm_snd_soc_register_card(&pdev->dev, card);
 104 }
 105
 106 static int sof_nocodec_remove(struct platform_device *pdev)
 107 {
 108         return 0;
 109 }
 110
 111 static struct platform_driver sof_nocodec_audio = {
 112         .probe = sof_nocodec_probe,
 113         .remove = sof_nocodec_remove,
 114         .driver = {
 115                 .name = "sof-nocodec",
 116                 .pm = &snd_soc_pm_ops,
 117         },
 118 };
 119 module_platform_driver(sof_nocodec_audio)
 120
 121 MODULE_DESCRIPTION("ASoC sof nocodec");
 122 MODULE_AUTHOR("Liam Girdwood");
 123 MODULE_LICENSE("Dual BSD/GPL");
 124 MODULE_ALIAS("platform:sof-nocodec");