LXR linux/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
  15static struct snd_soc_card sof_nocodec_card = {
  16        .name = "nocodec", /* the sof- prefix is added by the core */
  17};
  18
  19static 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
  52int 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}
  80EXPORT_SYMBOL(sof_nocodec_setup);
  81
  82static 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
  91static int sof_nocodec_remove(struct platform_device *pdev)
  92{
  93        return 0;
  94}
  95
  96static 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};
 104module_platform_driver(sof_nocodec_audio)
 105
 106MODULE_DESCRIPTION("ASoC sof nocodec");
 107MODULE_AUTHOR("Liam Girdwood");
 108MODULE_LICENSE("Dual BSD/GPL");
 109MODULE_ALIAS("platform:sof-nocodec");
 110