1// SPDX-License-Identifier: GPL-2.0-only
2//
3// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
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
16static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port,
17			       struct snd_soc_dai_link **dai_link)
18{
19	struct snd_soc_dai_link_component *platform;
20	struct snd_soc_dai_link *dl;
21
22	dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
23	platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
24	if (!dl || !platform)
25		return -ENOMEM;
26
27	platform->name = platform_name;
28
29	dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec", ssp_port);
30	dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
31	if (!dl->name || !dl->cpus)
32		return -ENOMEM;
33
34	dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d Pin", ssp_port);
35	dl->codecs = &asoc_dummy_dlc;
36	if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name)
37		return -ENOMEM;
38
39	dl->num_cpus = 1;
40	dl->num_codecs = 1;
41	dl->platforms = platform;
42	dl->num_platforms = 1;
43	dl->id = 0;
44	dl->nonatomic = 1;
45	dl->no_pcm = 1;
46	dl->dpcm_capture = 1;
47	dl->dpcm_playback = 1;
48
49	*dai_link = dl;
50
51	return 0;
52}
53
54static int avs_create_dapm_routes(struct device *dev, int ssp_port,
55				  struct snd_soc_dapm_route **routes, int *num_routes)
56{
57	struct snd_soc_dapm_route *dr;
58	const int num_dr = 2;
59
60	dr = devm_kcalloc(dev, num_dr, sizeof(*dr), GFP_KERNEL);
61	if (!dr)
62		return -ENOMEM;
63
64	dr[0].sink = devm_kasprintf(dev, GFP_KERNEL, "ssp%dpb", ssp_port);
65	dr[0].source = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Tx", ssp_port);
66	if (!dr[0].sink || !dr[0].source)
67		return -ENOMEM;
68
69	dr[1].sink = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Rx", ssp_port);
70	dr[1].source = devm_kasprintf(dev, GFP_KERNEL, "ssp%dcp", ssp_port);
71	if (!dr[1].sink || !dr[1].source)
72		return -ENOMEM;
73
74	*routes = dr;
75	*num_routes = num_dr;
76
77	return 0;
78}
79
80static int avs_create_dapm_widgets(struct device *dev, int ssp_port,
81				   struct snd_soc_dapm_widget **widgets, int *num_widgets)
82{
83	struct snd_soc_dapm_widget *dw;
84	const int num_dw = 2;
85
86	dw = devm_kcalloc(dev, num_dw, sizeof(*dw), GFP_KERNEL);
87	if (!dw)
88		return -ENOMEM;
89
90	dw[0].id = snd_soc_dapm_hp;
91	dw[0].reg = SND_SOC_NOPM;
92	dw[0].name = devm_kasprintf(dev, GFP_KERNEL, "ssp%dpb", ssp_port);
93	if (!dw[0].name)
94		return -ENOMEM;
95
96	dw[1].id = snd_soc_dapm_mic;
97	dw[1].reg = SND_SOC_NOPM;
98	dw[1].name = devm_kasprintf(dev, GFP_KERNEL, "ssp%dcp", ssp_port);
99	if (!dw[1].name)
100		return -ENOMEM;
101
102	*widgets = dw;
103	*num_widgets = num_dw;
104
105	return 0;
106}
107
108static int avs_i2s_test_probe(struct platform_device *pdev)
109{
110	struct snd_soc_dapm_widget *widgets;
111	struct snd_soc_dapm_route *routes;
112	struct snd_soc_dai_link *dai_link;
113	struct snd_soc_acpi_mach *mach;
114	struct snd_soc_card *card;
115	struct device *dev = &pdev->dev;
116	const char *pname;
117	int num_routes, num_widgets;
118	int ssp_port, ret;
119
120	mach = dev_get_platdata(dev);
121	pname = mach->mach_params.platform;
122	ssp_port = __ffs(mach->mach_params.i2s_link_mask);
123
124	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
125	if (!card)
126		return -ENOMEM;
127
128	card->name = devm_kasprintf(dev, GFP_KERNEL, "ssp%d-loopback", ssp_port);
129	if (!card->name)
130		return -ENOMEM;
131
132	ret = avs_create_dai_link(dev, pname, ssp_port, &dai_link);
133	if (ret) {
134		dev_err(dev, "Failed to create dai link: %d\n", ret);
135		return ret;
136	}
137
138	ret = avs_create_dapm_routes(dev, ssp_port, &routes, &num_routes);
139	if (ret) {
140		dev_err(dev, "Failed to create dapm routes: %d\n", ret);
141		return ret;
142	}
143
144	ret = avs_create_dapm_widgets(dev, ssp_port, &widgets, &num_widgets);
145	if (ret) {
146		dev_err(dev, "Failed to create dapm widgets: %d\n", ret);
147		return ret;
148	}
149
150	card->dev = dev;
151	card->owner = THIS_MODULE;
152	card->dai_link = dai_link;
153	card->num_links = 1;
154	card->dapm_routes = routes;
155	card->num_dapm_routes = num_routes;
156	card->dapm_widgets = widgets;
157	card->num_dapm_widgets = num_widgets;
158	card->fully_routed = true;
159
160	ret = snd_soc_fixup_dai_links_platform_name(card, pname);
161	if (ret)
162		return ret;
163
164	return devm_snd_soc_register_card(dev, card);
165}
166
167static struct platform_driver avs_i2s_test_driver = {
168	.probe = avs_i2s_test_probe,
169	.driver = {
170		.name = "avs_i2s_test",
171		.pm = &snd_soc_pm_ops,
172	},
173};
174
175module_platform_driver(avs_i2s_test_driver);
176
177MODULE_LICENSE("GPL");
178MODULE_ALIAS("platform:avs_i2s_test");
179