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, 2, 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 = &snd_soc_dummy_dlc;
  48                 links[i].platforms = &dlc[1];
  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                 if (drv[i].playback.channels_min)
  59                         links[i].dpcm_playback = 1;
  60                 if (drv[i].capture.channels_min)
  61                         links[i].dpcm_capture = 1;
  62
  63                 links[i].be_hw_params_fixup = sof_pcm_dai_link_fixup;
  64         }
  65
  66         card->dai_link = links;
  67         card->num_links = link_num;
  68
  69         return 0;
  70 }
  71
  72 static int sof_nocodec_setup(struct device *dev,
  73                              u32 num_dai_drivers,
  74                              struct snd_soc_dai_driver *dai_drivers)
  75 {
  76         struct snd_soc_dai_link *links;
  77
  78         /* create dummy BE dai_links */
  79         links = devm_kcalloc(dev, num_dai_drivers, sizeof(struct snd_soc_dai_link), GFP_KERNEL);
  80         if (!links)
  81                 return -ENOMEM;
  82
  83         return sof_nocodec_bes_setup(dev, dai_drivers, links, num_dai_drivers, &sof_nocodec_card);
  84 }
  85
  86 static int sof_nocodec_probe(struct platform_device *pdev)
  87 {
  88         struct snd_soc_card *card = &sof_nocodec_card;
  89         struct snd_soc_acpi_mach *mach;
  90         int ret;
  91
  92         card->dev = &pdev->dev;
  93         card->topology_shortname_created = true;
  94         mach = pdev->dev.platform_data;
  95
  96         ret = sof_nocodec_setup(card->dev, mach->mach_params.num_dai_drivers,
  97                                 mach->mach_params.dai_drivers);
  98         if (ret < 0)
  99                 return ret;
 100
 101         return devm_snd_soc_register_card(&pdev->dev, card);
 102 }
 103
 104 static struct platform_driver sof_nocodec_audio = {
 105         .probe = sof_nocodec_probe,
 106         .driver = {
 107                 .name = "sof-nocodec",
 108                 .pm = &snd_soc_pm_ops,
 109         },
 110 };
 111 module_platform_driver(sof_nocodec_audio)
 112
 113 MODULE_DESCRIPTION("ASoC sof nocodec");
 114 MODULE_AUTHOR("Liam Girdwood");
 115 MODULE_LICENSE("Dual BSD/GPL");
 116 MODULE_ALIAS("platform:sof-nocodec");