LXR linux/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
  16static 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
  22static 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_kzalloc(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
  74static 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_kzalloc(dev, sizeof(struct snd_soc_dai_link) * num_dai_drivers, 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
  88static 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
 106static int sof_nocodec_remove(struct platform_device *pdev)
 107{
 108        return 0;
 109}
 110
 111static 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};
 119module_platform_driver(sof_nocodec_audio)
 120
 121MODULE_DESCRIPTION("ASoC sof nocodec");
 122MODULE_AUTHOR("Liam Girdwood");
 123MODULE_LICENSE("Dual BSD/GPL");
 124MODULE_ALIAS("platform:sof-nocodec");
 125