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