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f2390880 KM |
1 | /* |
2 | * ASoC simple sound card support | |
3 | * | |
4 | * Copyright (C) 2012 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
fa558c28 KM |
11 | #include <linux/clk.h> |
12 | #include <linux/of.h> | |
f2390880 KM |
13 | #include <linux/platform_device.h> |
14 | #include <linux/module.h> | |
15 | #include <sound/simple_card.h> | |
16 | ||
17 | #define asoc_simple_get_card_info(p) \ | |
18 | container_of(p->dai_link, struct asoc_simple_card_info, snd_link) | |
19 | ||
a4a2992c KM |
20 | static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai, |
21 | struct asoc_simple_dai *set, | |
22 | unsigned int daifmt) | |
23 | { | |
24 | int ret = 0; | |
25 | ||
26 | daifmt |= set->fmt; | |
27 | ||
28 | if (!ret && daifmt) | |
29 | ret = snd_soc_dai_set_fmt(dai, daifmt); | |
30 | ||
e244bb9b KM |
31 | if (ret == -ENOTSUPP) { |
32 | dev_dbg(dai->dev, "ASoC: set_fmt is not supported\n"); | |
33 | ret = 0; | |
34 | } | |
35 | ||
a4a2992c KM |
36 | if (!ret && set->sysclk) |
37 | ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0); | |
38 | ||
39 | return ret; | |
40 | } | |
41 | ||
f2390880 KM |
42 | static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd) |
43 | { | |
a4a2992c | 44 | struct asoc_simple_card_info *info = asoc_simple_get_card_info(rtd); |
f2390880 KM |
45 | struct snd_soc_dai *codec = rtd->codec_dai; |
46 | struct snd_soc_dai *cpu = rtd->cpu_dai; | |
a4a2992c | 47 | unsigned int daifmt = info->daifmt; |
f2390880 KM |
48 | int ret; |
49 | ||
a4a2992c KM |
50 | ret = __asoc_simple_card_dai_init(codec, &info->codec_dai, daifmt); |
51 | if (ret < 0) | |
52 | return ret; | |
f2390880 | 53 | |
a4a2992c KM |
54 | ret = __asoc_simple_card_dai_init(cpu, &info->cpu_dai, daifmt); |
55 | if (ret < 0) | |
56 | return ret; | |
f2390880 KM |
57 | |
58 | return 0; | |
59 | } | |
60 | ||
fa558c28 KM |
61 | static int |
62 | asoc_simple_card_sub_parse_of(struct device_node *np, | |
63 | struct asoc_simple_dai *dai, | |
64 | struct device_node **node) | |
65 | { | |
66 | struct clk *clk; | |
67 | int ret; | |
68 | ||
69 | /* | |
70 | * get node via "sound-dai = <&phandle port>" | |
71 | * it will be used as xxx_of_node on soc_bind_dai_link() | |
72 | */ | |
73 | *node = of_parse_phandle(np, "sound-dai", 0); | |
74 | if (!*node) | |
75 | return -ENODEV; | |
76 | ||
77 | /* get dai->name */ | |
78 | ret = snd_soc_of_get_dai_name(np, &dai->name); | |
79 | if (ret < 0) | |
80 | goto parse_error; | |
81 | ||
82 | /* | |
83 | * bitclock-inversion, frame-inversion | |
84 | * bitclock-master, frame-master | |
85 | * and specific "format" if it has | |
86 | */ | |
87 | dai->fmt = snd_soc_of_parse_daifmt(np, NULL); | |
88 | ||
89 | /* | |
90 | * dai->sysclk come from | |
91 | * "clocks = <&xxx>" (if system has common clock) | |
92 | * or "system-clock-frequency = <xxx>" | |
93 | */ | |
94 | clk = of_clk_get(np, 0); | |
95 | if (IS_ERR(clk)) | |
96 | of_property_read_u32(np, | |
97 | "system-clock-frequency", | |
98 | &dai->sysclk); | |
99 | else | |
100 | dai->sysclk = clk_get_rate(clk); | |
101 | ||
102 | ret = 0; | |
103 | ||
104 | parse_error: | |
105 | of_node_put(*node); | |
106 | ||
107 | return ret; | |
108 | } | |
109 | ||
110 | static int asoc_simple_card_parse_of(struct device_node *node, | |
111 | struct asoc_simple_card_info *info, | |
112 | struct device *dev, | |
113 | struct device_node **of_cpu, | |
114 | struct device_node **of_codec, | |
115 | struct device_node **of_platform) | |
116 | { | |
117 | struct device_node *np; | |
118 | char *name; | |
119 | int ret = 0; | |
120 | ||
121 | /* get CPU/CODEC common format via simple-audio-card,format */ | |
122 | info->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") & | |
123 | (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK); | |
124 | ||
125 | /* CPU sub-node */ | |
126 | ret = -EINVAL; | |
127 | np = of_get_child_by_name(node, "simple-audio-card,cpu"); | |
128 | if (np) | |
129 | ret = asoc_simple_card_sub_parse_of(np, | |
130 | &info->cpu_dai, | |
131 | of_cpu); | |
132 | if (ret < 0) | |
133 | return ret; | |
134 | ||
135 | /* CODEC sub-node */ | |
136 | ret = -EINVAL; | |
137 | np = of_get_child_by_name(node, "simple-audio-card,codec"); | |
138 | if (np) | |
139 | ret = asoc_simple_card_sub_parse_of(np, | |
140 | &info->codec_dai, | |
141 | of_codec); | |
142 | if (ret < 0) | |
143 | return ret; | |
144 | ||
145 | /* card name is created from CPU/CODEC dai name */ | |
146 | name = devm_kzalloc(dev, | |
147 | strlen(info->cpu_dai.name) + | |
148 | strlen(info->codec_dai.name) + 2, | |
149 | GFP_KERNEL); | |
150 | sprintf(name, "%s-%s", info->cpu_dai.name, info->codec_dai.name); | |
151 | info->name = info->card = name; | |
152 | ||
153 | /* simple-card assumes platform == cpu */ | |
154 | *of_platform = *of_cpu; | |
155 | ||
156 | dev_dbg(dev, "card-name : %s\n", info->card); | |
157 | dev_dbg(dev, "platform : %04x\n", info->daifmt); | |
158 | dev_dbg(dev, "cpu : %s / %04x / %d\n", | |
159 | info->cpu_dai.name, | |
160 | info->cpu_dai.fmt, | |
161 | info->cpu_dai.sysclk); | |
162 | dev_dbg(dev, "codec : %s / %04x / %d\n", | |
163 | info->codec_dai.name, | |
164 | info->codec_dai.fmt, | |
165 | info->codec_dai.sysclk); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
f2390880 KM |
170 | static int asoc_simple_card_probe(struct platform_device *pdev) |
171 | { | |
fa558c28 KM |
172 | struct asoc_simple_card_info *cinfo; |
173 | struct device_node *np = pdev->dev.of_node; | |
174 | struct device_node *of_cpu, *of_codec, *of_platform; | |
f89983ef | 175 | struct device *dev = &pdev->dev; |
f2390880 | 176 | |
fa558c28 KM |
177 | cinfo = NULL; |
178 | of_cpu = NULL; | |
179 | of_codec = NULL; | |
180 | of_platform = NULL; | |
181 | if (np && of_device_is_available(np)) { | |
182 | cinfo = devm_kzalloc(dev, sizeof(*cinfo), GFP_KERNEL); | |
183 | if (cinfo) { | |
184 | int ret; | |
185 | ret = asoc_simple_card_parse_of(np, cinfo, dev, | |
186 | &of_cpu, | |
187 | &of_codec, | |
188 | &of_platform); | |
189 | if (ret < 0) { | |
190 | if (ret != -EPROBE_DEFER) | |
191 | dev_err(dev, "parse error %d\n", ret); | |
192 | return ret; | |
193 | } | |
194 | } | |
195 | } else { | |
196 | cinfo = pdev->dev.platform_data; | |
197 | } | |
198 | ||
f2390880 | 199 | if (!cinfo) { |
f89983ef | 200 | dev_err(dev, "no info for asoc-simple-card\n"); |
f2390880 KM |
201 | return -EINVAL; |
202 | } | |
203 | ||
204 | if (!cinfo->name || | |
205 | !cinfo->card || | |
fa558c28 KM |
206 | !cinfo->codec_dai.name || |
207 | !(cinfo->codec || of_codec) || | |
208 | !(cinfo->platform || of_platform) || | |
209 | !(cinfo->cpu_dai.name || of_cpu)) { | |
f89983ef | 210 | dev_err(dev, "insufficient asoc_simple_card_info settings\n"); |
f2390880 KM |
211 | return -EINVAL; |
212 | } | |
213 | ||
214 | /* | |
215 | * init snd_soc_dai_link | |
216 | */ | |
217 | cinfo->snd_link.name = cinfo->name; | |
218 | cinfo->snd_link.stream_name = cinfo->name; | |
a4a2992c | 219 | cinfo->snd_link.cpu_dai_name = cinfo->cpu_dai.name; |
f2390880 KM |
220 | cinfo->snd_link.platform_name = cinfo->platform; |
221 | cinfo->snd_link.codec_name = cinfo->codec; | |
a4a2992c | 222 | cinfo->snd_link.codec_dai_name = cinfo->codec_dai.name; |
fa558c28 KM |
223 | cinfo->snd_link.cpu_of_node = of_cpu; |
224 | cinfo->snd_link.codec_of_node = of_codec; | |
225 | cinfo->snd_link.platform_of_node = of_platform; | |
a4a2992c | 226 | cinfo->snd_link.init = asoc_simple_card_dai_init; |
f2390880 KM |
227 | |
228 | /* | |
229 | * init snd_soc_card | |
230 | */ | |
231 | cinfo->snd_card.name = cinfo->card; | |
232 | cinfo->snd_card.owner = THIS_MODULE; | |
233 | cinfo->snd_card.dai_link = &cinfo->snd_link; | |
234 | cinfo->snd_card.num_links = 1; | |
235 | cinfo->snd_card.dev = &pdev->dev; | |
236 | ||
237 | return snd_soc_register_card(&cinfo->snd_card); | |
238 | } | |
239 | ||
240 | static int asoc_simple_card_remove(struct platform_device *pdev) | |
241 | { | |
242 | struct asoc_simple_card_info *cinfo = pdev->dev.platform_data; | |
243 | ||
244 | return snd_soc_unregister_card(&cinfo->snd_card); | |
245 | } | |
246 | ||
fa558c28 KM |
247 | static const struct of_device_id asoc_simple_of_match[] = { |
248 | { .compatible = "simple-audio-card", }, | |
249 | {}, | |
250 | }; | |
251 | MODULE_DEVICE_TABLE(of, asoc_simple_of_match); | |
252 | ||
f2390880 KM |
253 | static struct platform_driver asoc_simple_card = { |
254 | .driver = { | |
255 | .name = "asoc-simple-card", | |
c445be35 | 256 | .owner = THIS_MODULE, |
fa558c28 | 257 | .of_match_table = asoc_simple_of_match, |
f2390880 KM |
258 | }, |
259 | .probe = asoc_simple_card_probe, | |
260 | .remove = asoc_simple_card_remove, | |
261 | }; | |
262 | ||
263 | module_platform_driver(asoc_simple_card); | |
264 | ||
c445be35 | 265 | MODULE_ALIAS("platform:asoc-simple-card"); |
f2390880 KM |
266 | MODULE_LICENSE("GPL"); |
267 | MODULE_DESCRIPTION("ASoC Simple Sound Card"); | |
268 | MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); |