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/module.h>
10 #include <sound/pcm.h>
11 #include <sound/pcm_params.h>
12 #include <sound/soc.h>
13 #include <sound/soc-acpi.h>
14 #include <sound/soc-dapm.h>
15 #include "../utils.h"
16
17 static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port,
18 int tdm_slot, struct snd_soc_dai_link **dai_link)
19 {
20 struct snd_soc_dai_link_component *platform;
21 struct snd_soc_dai_link *dl;
22
23 dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
24 platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
25 if (!dl || !platform)
26 return -ENOMEM;
27
28 platform->name = platform_name;
29
30 dl->name = devm_kasprintf(dev, GFP_KERNEL,
31 AVS_STRING_FMT("SSP", "-Codec", ssp_port, tdm_slot));
32 dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
33 if (!dl->name || !dl->cpus)
34 return -ENOMEM;
35
36 dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL,
37 AVS_STRING_FMT("SSP", " Pin", ssp_port, tdm_slot));
38 dl->codecs = &snd_soc_dummy_dlc;
39 if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name)
40 return -ENOMEM;
41
42 dl->num_cpus = 1;
43 dl->num_codecs = 1;
44 dl->platforms = platform;
45 dl->num_platforms = 1;
46 dl->id = 0;
47 dl->nonatomic = 1;
48 dl->no_pcm = 1;
49 dl->dpcm_capture = 1;
50 dl->dpcm_playback = 1;
51
52 *dai_link = dl;
53
54 return 0;
55 }
56
57 static int avs_i2s_test_probe(struct platform_device *pdev)
58 {
59 struct snd_soc_dai_link *dai_link;
60 struct snd_soc_acpi_mach *mach;
61 struct snd_soc_card *card;
62 struct device *dev = &pdev->dev;
63 const char *pname;
64 int ssp_port, tdm_slot, ret;
65
66 mach = dev_get_platdata(dev);
67 pname = mach->mach_params.platform;
68
69 if (!avs_mach_singular_ssp(mach)) {
70 dev_err(dev, "Invalid SSP configuration\n");
71 return -EINVAL;
72 }
73 ssp_port = avs_mach_ssp_port(mach);
74
75 if (!avs_mach_singular_tdm(mach, ssp_port)) {
76 dev_err(dev, "Invalid TDM configuration\n");
77 return -EINVAL;
78 }
79 tdm_slot = avs_mach_ssp_tdm(mach, ssp_port);
80
81 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
82 if (!card)
83 return -ENOMEM;
84
85 card->name = devm_kasprintf(dev, GFP_KERNEL,
86 AVS_STRING_FMT("ssp", "-loopback", ssp_port, tdm_slot));
87 if (!card->name)
88 return -ENOMEM;
89
90 ret = avs_create_dai_link(dev, pname, ssp_port, tdm_slot, &dai_link);
91 if (ret) {
92 dev_err(dev, "Failed to create dai link: %d\n", ret);
93 return ret;
94 }
95
96 card->dev = dev;
97 card->owner = THIS_MODULE;
98 card->dai_link = dai_link;
99 card->num_links = 1;
100 card->fully_routed = true;
101
102 ret = snd_soc_fixup_dai_links_platform_name(card, pname);
103 if (ret)
104 return ret;
105
106 return devm_snd_soc_register_card(dev, card);
107 }
108
109 static const struct platform_device_id avs_i2s_test_driver_ids[] = {
110 {
111 .name = "avs_i2s_test",
112 },
113 {},
114 };
115 MODULE_DEVICE_TABLE(platform, avs_i2s_test_driver_ids);
116
117 static struct platform_driver avs_i2s_test_driver = {
118 .probe = avs_i2s_test_probe,
119 .driver = {
120 .name = "avs_i2s_test",
121 .pm = &snd_soc_pm_ops,
122 },
123 .id_table = avs_i2s_test_driver_ids,
124 };
125
126 module_platform_driver(avs_i2s_test_driver);
127
128 MODULE_DESCRIPTION("Intel i2s test machine driver");
129 MODULE_LICENSE("GPL");
130
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