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
avs_create_dai_link(struct device * dev,const char * platform_name,int ssp_port,struct snd_soc_dai_link ** dai_link)16 static 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
avs_create_dapm_routes(struct device * dev,int ssp_port,struct snd_soc_dapm_route ** routes,int * num_routes)54 static 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
avs_create_dapm_widgets(struct device * dev,int ssp_port,struct snd_soc_dapm_widget ** widgets,int * num_widgets)80 static 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
avs_i2s_test_probe(struct platform_device * pdev)108 static 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
167 static 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
175 module_platform_driver(avs_i2s_test_driver);
176
177 MODULE_LICENSE("GPL");
178 MODULE_ALIAS("platform:avs_i2s_test");
179