probe.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2//
 3// Copyright(c) 2021-2022 Intel Corporation
 4//
 5// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
 6//          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
 7//
 8
 9#include <linux/device.h>
10#include <linux/module.h>
11#include <sound/soc.h>
12
13static int avs_create_dai_links(struct device *dev, struct snd_soc_dai_link **links, int *num_links)
14{
15	struct snd_soc_dai_link *dl;
16
17	dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
18	if (!dl)
19		return -ENOMEM;
20
21	dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
22	dl->platforms = devm_kzalloc(dev, sizeof(*dl->platforms), GFP_KERNEL);
23	if (!dl->cpus || !dl->platforms)
24		return -ENOMEM;
25
26	dl->name = "Compress Probe Capture";
27	dl->cpus->dai_name = "Probe Extraction CPU DAI";
28	dl->num_cpus = 1;
29	dl->codecs = &snd_soc_dummy_dlc;
30	dl->num_codecs = 1;
31	dl->platforms->name = dev_name(dev);
32	dl->num_platforms = 1;
33	dl->nonatomic = 1;
34
35	*links = dl;
36	*num_links = 1;
37	return 0;
38}
39
40static int avs_probe_mb_probe(struct platform_device *pdev)
41{
42	struct device *dev = &pdev->dev;
43	struct snd_soc_card *card;
44	int ret;
45
46	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
47	if (!card)
48		return -ENOMEM;
49
50	ret = avs_create_dai_links(dev, &card->dai_link, &card->num_links);
51	if (ret)
52		return ret;
53
54	card->driver_name = "avs_probe_mb";
55	card->long_name = card->name = "AVS PROBE";
56	card->dev = dev;
57	card->owner = THIS_MODULE;
58	card->fully_routed = true;
59
60	return devm_snd_soc_register_deferrable_card(dev, card);
61}
62
63static const struct platform_device_id avs_probe_mb_driver_ids[] = {
64	{
65		.name = "avs_probe_mb",
66	},
67	{},
68};
69MODULE_DEVICE_TABLE(platform, avs_probe_mb_driver_ids);
70
71static struct platform_driver avs_probe_mb_driver = {
72	.probe = avs_probe_mb_probe,
73	.driver = {
74		.name = "avs_probe_mb",
75		.pm = &snd_soc_pm_ops,
76	},
77	.id_table = avs_probe_mb_driver_ids,
78};
79
80module_platform_driver(avs_probe_mb_driver);
81
82MODULE_DESCRIPTION("Intel probe machine driver");
83MODULE_LICENSE("GPL");