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