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 #include "../utils.h"
16
avs_create_dai_link(struct device * dev,const char * platform_name,int ssp_port,int tdm_slot,struct snd_soc_dai_link ** dai_link)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
avs_create_dapm_routes(struct device * dev,int ssp_port,int tdm_slot,struct snd_soc_dapm_route ** routes,int * num_routes)57 static int avs_create_dapm_routes(struct device *dev, int ssp_port, int tdm_slot,
58 struct snd_soc_dapm_route **routes, int *num_routes)
59 {
60 struct snd_soc_dapm_route *dr;
61 const int num_dr = 2;
62
63 dr = devm_kcalloc(dev, num_dr, sizeof(*dr), GFP_KERNEL);
64 if (!dr)
65 return -ENOMEM;
66
67 dr[0].sink = devm_kasprintf(dev, GFP_KERNEL,
68 AVS_STRING_FMT("ssp", "pb", ssp_port, tdm_slot));
69 dr[0].source = devm_kasprintf(dev, GFP_KERNEL,
70 AVS_STRING_FMT("ssp", " Tx", ssp_port, tdm_slot));
71 if (!dr[0].sink || !dr[0].source)
72 return -ENOMEM;
73
74 dr[1].sink = devm_kasprintf(dev, GFP_KERNEL,
75 AVS_STRING_FMT("ssp", " Rx", ssp_port, tdm_slot));
76 dr[1].source = devm_kasprintf(dev, GFP_KERNEL,
77 AVS_STRING_FMT("ssp", "cp", ssp_port, tdm_slot));
78 if (!dr[1].sink || !dr[1].source)
79 return -ENOMEM;
80
81 *routes = dr;
82 *num_routes = num_dr;
83
84 return 0;
85 }
86
avs_create_dapm_widgets(struct device * dev,int ssp_port,int tdm_slot,struct snd_soc_dapm_widget ** widgets,int * num_widgets)87 static int avs_create_dapm_widgets(struct device *dev, int ssp_port, int tdm_slot,
88 struct snd_soc_dapm_widget **widgets, int *num_widgets)
89 {
90 struct snd_soc_dapm_widget *dw;
91 const int num_dw = 2;
92
93 dw = devm_kcalloc(dev, num_dw, sizeof(*dw), GFP_KERNEL);
94 if (!dw)
95 return -ENOMEM;
96
97 dw[0].id = snd_soc_dapm_hp;
98 dw[0].reg = SND_SOC_NOPM;
99 dw[0].name = devm_kasprintf(dev, GFP_KERNEL,
100 AVS_STRING_FMT("ssp", "pb", ssp_port, tdm_slot));
101 if (!dw[0].name)
102 return -ENOMEM;
103
104 dw[1].id = snd_soc_dapm_mic;
105 dw[1].reg = SND_SOC_NOPM;
106 dw[1].name = devm_kasprintf(dev, GFP_KERNEL,
107 AVS_STRING_FMT("ssp", "cp", ssp_port, tdm_slot));
108 if (!dw[1].name)
109 return -ENOMEM;
110
111 *widgets = dw;
112 *num_widgets = num_dw;
113
114 return 0;
115 }
116
avs_i2s_test_probe(struct platform_device * pdev)117 static int avs_i2s_test_probe(struct platform_device *pdev)
118 {
119 struct snd_soc_dapm_widget *widgets;
120 struct snd_soc_dapm_route *routes;
121 struct snd_soc_dai_link *dai_link;
122 struct snd_soc_acpi_mach *mach;
123 struct snd_soc_card *card;
124 struct device *dev = &pdev->dev;
125 const char *pname;
126 int num_routes, num_widgets;
127 int ssp_port, tdm_slot, ret;
128
129 mach = dev_get_platdata(dev);
130 pname = mach->mach_params.platform;
131
132 if (!avs_mach_singular_ssp(mach)) {
133 dev_err(dev, "Invalid SSP configuration\n");
134 return -EINVAL;
135 }
136 ssp_port = avs_mach_ssp_port(mach);
137
138 if (!avs_mach_singular_tdm(mach, ssp_port)) {
139 dev_err(dev, "Invalid TDM configuration\n");
140 return -EINVAL;
141 }
142 tdm_slot = avs_mach_ssp_tdm(mach, ssp_port);
143
144 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
145 if (!card)
146 return -ENOMEM;
147
148 card->name = devm_kasprintf(dev, GFP_KERNEL,
149 AVS_STRING_FMT("ssp", "-loopback", ssp_port, tdm_slot));
150 if (!card->name)
151 return -ENOMEM;
152
153 ret = avs_create_dai_link(dev, pname, ssp_port, tdm_slot, &dai_link);
154 if (ret) {
155 dev_err(dev, "Failed to create dai link: %d\n", ret);
156 return ret;
157 }
158
159 ret = avs_create_dapm_routes(dev, ssp_port, tdm_slot, &routes, &num_routes);
160 if (ret) {
161 dev_err(dev, "Failed to create dapm routes: %d\n", ret);
162 return ret;
163 }
164
165 ret = avs_create_dapm_widgets(dev, ssp_port, tdm_slot, &widgets, &num_widgets);
166 if (ret) {
167 dev_err(dev, "Failed to create dapm widgets: %d\n", ret);
168 return ret;
169 }
170
171 card->dev = dev;
172 card->owner = THIS_MODULE;
173 card->dai_link = dai_link;
174 card->num_links = 1;
175 card->dapm_routes = routes;
176 card->num_dapm_routes = num_routes;
177 card->dapm_widgets = widgets;
178 card->num_dapm_widgets = num_widgets;
179 card->fully_routed = true;
180
181 ret = snd_soc_fixup_dai_links_platform_name(card, pname);
182 if (ret)
183 return ret;
184
185 return devm_snd_soc_register_card(dev, card);
186 }
187
188 static const struct platform_device_id avs_i2s_test_driver_ids[] = {
189 {
190 .name = "avs_i2s_test",
191 },
192 {},
193 };
194 MODULE_DEVICE_TABLE(platform, avs_i2s_test_driver_ids);
195
196 static struct platform_driver avs_i2s_test_driver = {
197 .probe = avs_i2s_test_probe,
198 .driver = {
199 .name = "avs_i2s_test",
200 .pm = &snd_soc_pm_ops,
201 },
202 .id_table = avs_i2s_test_driver_ids,
203 };
204
205 module_platform_driver(avs_i2s_test_driver);
206
207 MODULE_LICENSE("GPL");
208