Commit | Line | Data |
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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 | 11 | #include <linux/clk.h> |
f2390880 | 12 | #include <linux/module.h> |
fa558c28 | 13 | #include <linux/of.h> |
f2390880 | 14 | #include <linux/platform_device.h> |
ca919fe4 | 15 | #include <linux/string.h> |
f2390880 KM |
16 | #include <sound/simple_card.h> |
17 | ||
45fce594 JFM |
18 | struct simple_card_data { |
19 | struct snd_soc_card snd_card; | |
20 | unsigned int daifmt; | |
21 | struct asoc_simple_dai cpu_dai; | |
22 | struct asoc_simple_dai codec_dai; | |
23 | struct snd_soc_dai_link snd_link; | |
24 | }; | |
25 | ||
a4a2992c KM |
26 | static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai, |
27 | struct asoc_simple_dai *set, | |
28 | unsigned int daifmt) | |
29 | { | |
30 | int ret = 0; | |
31 | ||
32 | daifmt |= set->fmt; | |
33 | ||
e874ddea | 34 | if (daifmt) |
a4a2992c KM |
35 | ret = snd_soc_dai_set_fmt(dai, daifmt); |
36 | ||
e244bb9b KM |
37 | if (ret == -ENOTSUPP) { |
38 | dev_dbg(dai->dev, "ASoC: set_fmt is not supported\n"); | |
39 | ret = 0; | |
40 | } | |
41 | ||
a4a2992c KM |
42 | if (!ret && set->sysclk) |
43 | ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0); | |
44 | ||
45 | return ret; | |
46 | } | |
47 | ||
f2390880 KM |
48 | static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd) |
49 | { | |
45fce594 | 50 | struct simple_card_data *info = |
ba194a4d | 51 | snd_soc_card_get_drvdata(rtd->card); |
f2390880 KM |
52 | struct snd_soc_dai *codec = rtd->codec_dai; |
53 | struct snd_soc_dai *cpu = rtd->cpu_dai; | |
a4a2992c | 54 | unsigned int daifmt = info->daifmt; |
f2390880 KM |
55 | int ret; |
56 | ||
a4a2992c KM |
57 | ret = __asoc_simple_card_dai_init(codec, &info->codec_dai, daifmt); |
58 | if (ret < 0) | |
59 | return ret; | |
f2390880 | 60 | |
a4a2992c KM |
61 | ret = __asoc_simple_card_dai_init(cpu, &info->cpu_dai, daifmt); |
62 | if (ret < 0) | |
63 | return ret; | |
f2390880 KM |
64 | |
65 | return 0; | |
66 | } | |
67 | ||
fa558c28 KM |
68 | static int |
69 | asoc_simple_card_sub_parse_of(struct device_node *np, | |
70 | struct asoc_simple_dai *dai, | |
52008472 JFM |
71 | const struct device_node **p_node, |
72 | const char **name) | |
fa558c28 | 73 | { |
201a0eac | 74 | struct device_node *node; |
fa558c28 KM |
75 | struct clk *clk; |
76 | int ret; | |
77 | ||
78 | /* | |
79 | * get node via "sound-dai = <&phandle port>" | |
80 | * it will be used as xxx_of_node on soc_bind_dai_link() | |
81 | */ | |
201a0eac JFM |
82 | node = of_parse_phandle(np, "sound-dai", 0); |
83 | if (!node) | |
fa558c28 | 84 | return -ENODEV; |
201a0eac | 85 | *p_node = node; |
fa558c28 KM |
86 | |
87 | /* get dai->name */ | |
52008472 | 88 | ret = snd_soc_of_get_dai_name(np, name); |
fa558c28 KM |
89 | if (ret < 0) |
90 | goto parse_error; | |
91 | ||
92 | /* | |
93 | * bitclock-inversion, frame-inversion | |
94 | * bitclock-master, frame-master | |
95 | * and specific "format" if it has | |
96 | */ | |
97 | dai->fmt = snd_soc_of_parse_daifmt(np, NULL); | |
98 | ||
99 | /* | |
100 | * dai->sysclk come from | |
101 | * "clocks = <&xxx>" (if system has common clock) | |
102 | * or "system-clock-frequency = <xxx>" | |
71467e46 | 103 | * or device's module clock. |
fa558c28 | 104 | */ |
71467e46 XL |
105 | if (of_property_read_bool(np, "clocks")) { |
106 | clk = of_clk_get(np, 0); | |
107 | if (IS_ERR(clk)) { | |
108 | ret = PTR_ERR(clk); | |
109 | goto parse_error; | |
110 | } | |
111 | ||
112 | dai->sysclk = clk_get_rate(clk); | |
113 | } else if (of_property_read_bool(np, "system-clock-frequency")) { | |
fa558c28 KM |
114 | of_property_read_u32(np, |
115 | "system-clock-frequency", | |
116 | &dai->sysclk); | |
71467e46 | 117 | } else { |
201a0eac | 118 | clk = of_clk_get(node, 0); |
e2a19ac6 XL |
119 | if (!IS_ERR(clk)) |
120 | dai->sysclk = clk_get_rate(clk); | |
71467e46 | 121 | } |
fa558c28 KM |
122 | |
123 | ret = 0; | |
124 | ||
125 | parse_error: | |
201a0eac | 126 | of_node_put(node); |
fa558c28 KM |
127 | |
128 | return ret; | |
129 | } | |
130 | ||
131 | static int asoc_simple_card_parse_of(struct device_node *node, | |
45fce594 | 132 | struct simple_card_data *info, |
201a0eac | 133 | struct device *dev) |
fa558c28 | 134 | { |
5ca8ba41 | 135 | struct snd_soc_dai_link *dai_link = info->snd_card.dai_link; |
fa558c28 KM |
136 | struct device_node *np; |
137 | char *name; | |
d4c22094 | 138 | int ret; |
fa558c28 KM |
139 | |
140 | /* get CPU/CODEC common format via simple-audio-card,format */ | |
141 | info->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") & | |
142 | (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK); | |
143 | ||
d4c22094 | 144 | /* DAPM routes */ |
8c0b8230 | 145 | if (of_property_read_bool(node, "simple-audio-card,routing")) { |
f87a3e82 | 146 | ret = snd_soc_of_parse_audio_routing(&info->snd_card, |
8c0b8230 | 147 | "simple-audio-card,routing"); |
f87a3e82 XL |
148 | if (ret) |
149 | return ret; | |
150 | } | |
d4c22094 | 151 | |
fa558c28 KM |
152 | /* CPU sub-node */ |
153 | ret = -EINVAL; | |
154 | np = of_get_child_by_name(node, "simple-audio-card,cpu"); | |
155 | if (np) | |
156 | ret = asoc_simple_card_sub_parse_of(np, | |
157 | &info->cpu_dai, | |
52008472 JFM |
158 | &dai_link->cpu_of_node, |
159 | &dai_link->cpu_dai_name); | |
fa558c28 KM |
160 | if (ret < 0) |
161 | return ret; | |
162 | ||
163 | /* CODEC sub-node */ | |
164 | ret = -EINVAL; | |
165 | np = of_get_child_by_name(node, "simple-audio-card,codec"); | |
166 | if (np) | |
167 | ret = asoc_simple_card_sub_parse_of(np, | |
168 | &info->codec_dai, | |
52008472 JFM |
169 | &dai_link->codec_of_node, |
170 | &dai_link->codec_dai_name); | |
fa558c28 KM |
171 | if (ret < 0) |
172 | return ret; | |
173 | ||
52008472 | 174 | if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) |
dd41e0c4 XL |
175 | return -EINVAL; |
176 | ||
fa558c28 KM |
177 | /* card name is created from CPU/CODEC dai name */ |
178 | name = devm_kzalloc(dev, | |
52008472 JFM |
179 | strlen(dai_link->cpu_dai_name) + |
180 | strlen(dai_link->codec_dai_name) + 2, | |
fa558c28 | 181 | GFP_KERNEL); |
52008472 JFM |
182 | sprintf(name, "%s-%s", dai_link->cpu_dai_name, |
183 | dai_link->codec_dai_name); | |
2bee9914 | 184 | info->snd_card.name = name; |
5ca8ba41 | 185 | dai_link->name = dai_link->stream_name = name; |
fa558c28 KM |
186 | |
187 | /* simple-card assumes platform == cpu */ | |
5ca8ba41 | 188 | dai_link->platform_of_node = dai_link->cpu_of_node; |
fa558c28 | 189 | |
2bee9914 | 190 | dev_dbg(dev, "card-name : %s\n", name); |
fa558c28 KM |
191 | dev_dbg(dev, "platform : %04x\n", info->daifmt); |
192 | dev_dbg(dev, "cpu : %s / %04x / %d\n", | |
52008472 | 193 | dai_link->cpu_dai_name, |
fa558c28 KM |
194 | info->cpu_dai.fmt, |
195 | info->cpu_dai.sysclk); | |
196 | dev_dbg(dev, "codec : %s / %04x / %d\n", | |
52008472 | 197 | dai_link->codec_dai_name, |
fa558c28 KM |
198 | info->codec_dai.fmt, |
199 | info->codec_dai.sysclk); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
f2390880 KM |
204 | static int asoc_simple_card_probe(struct platform_device *pdev) |
205 | { | |
45fce594 | 206 | struct simple_card_data *priv; |
5ca8ba41 | 207 | struct snd_soc_dai_link *dai_link; |
fa558c28 | 208 | struct device_node *np = pdev->dev.of_node; |
f89983ef | 209 | struct device *dev = &pdev->dev; |
ca919fe4 | 210 | int ret; |
f2390880 | 211 | |
ca65b492 JFM |
212 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
213 | if (!priv) | |
ca919fe4 XL |
214 | return -ENOMEM; |
215 | ||
201a0eac JFM |
216 | /* |
217 | * init snd_soc_card | |
218 | */ | |
ca65b492 JFM |
219 | priv->snd_card.owner = THIS_MODULE; |
220 | priv->snd_card.dev = dev; | |
221 | dai_link = &priv->snd_link; | |
222 | priv->snd_card.dai_link = dai_link; | |
223 | priv->snd_card.num_links = 1; | |
201a0eac | 224 | |
fa558c28 | 225 | if (np && of_device_is_available(np)) { |
ca919fe4 | 226 | |
ca65b492 | 227 | ret = asoc_simple_card_parse_of(np, priv, dev); |
ca919fe4 XL |
228 | if (ret < 0) { |
229 | if (ret != -EPROBE_DEFER) | |
230 | dev_err(dev, "parse error %d\n", ret); | |
231 | return ret; | |
fa558c28 KM |
232 | } |
233 | } else { | |
ca65b492 JFM |
234 | struct asoc_simple_card_info *cinfo; |
235 | ||
236 | cinfo = dev->platform_data; | |
237 | if (!cinfo) { | |
34787d0a XL |
238 | dev_err(dev, "no info for asoc-simple-card\n"); |
239 | return -EINVAL; | |
240 | } | |
fa558c28 | 241 | |
7722f830 JFM |
242 | if (!cinfo->name || |
243 | !cinfo->card || | |
244 | !cinfo->codec_dai.name || | |
245 | !cinfo->codec || | |
246 | !cinfo->platform || | |
247 | !cinfo->cpu_dai.name) { | |
248 | dev_err(dev, "insufficient asoc_simple_card_info settings\n"); | |
249 | return -EINVAL; | |
250 | } | |
2bee9914 | 251 | |
ca65b492 | 252 | priv->snd_card.name = cinfo->card; |
5ca8ba41 JFM |
253 | dai_link->name = cinfo->name; |
254 | dai_link->stream_name = cinfo->name; | |
255 | dai_link->platform_name = cinfo->platform; | |
256 | dai_link->codec_name = cinfo->codec; | |
52008472 JFM |
257 | dai_link->cpu_dai_name = cinfo->cpu_dai.name; |
258 | dai_link->codec_dai_name = cinfo->codec_dai.name; | |
ca65b492 JFM |
259 | memcpy(&priv->cpu_dai, &cinfo->cpu_dai, |
260 | sizeof(priv->cpu_dai)); | |
261 | memcpy(&priv->codec_dai, &cinfo->codec_dai, | |
262 | sizeof(priv->codec_dai)); | |
f2390880 KM |
263 | } |
264 | ||
265 | /* | |
266 | * init snd_soc_dai_link | |
267 | */ | |
5ca8ba41 | 268 | dai_link->init = asoc_simple_card_dai_init; |
f2390880 | 269 | |
ca65b492 | 270 | snd_soc_card_set_drvdata(&priv->snd_card, priv); |
f2390880 | 271 | |
ca65b492 | 272 | return devm_snd_soc_register_card(&pdev->dev, &priv->snd_card); |
f2390880 KM |
273 | } |
274 | ||
fa558c28 KM |
275 | static const struct of_device_id asoc_simple_of_match[] = { |
276 | { .compatible = "simple-audio-card", }, | |
277 | {}, | |
278 | }; | |
279 | MODULE_DEVICE_TABLE(of, asoc_simple_of_match); | |
280 | ||
f2390880 KM |
281 | static struct platform_driver asoc_simple_card = { |
282 | .driver = { | |
283 | .name = "asoc-simple-card", | |
c445be35 | 284 | .owner = THIS_MODULE, |
fa558c28 | 285 | .of_match_table = asoc_simple_of_match, |
f2390880 KM |
286 | }, |
287 | .probe = asoc_simple_card_probe, | |
f2390880 KM |
288 | }; |
289 | ||
290 | module_platform_driver(asoc_simple_card); | |
291 | ||
c445be35 | 292 | MODULE_ALIAS("platform:asoc-simple-card"); |
f2390880 KM |
293 | MODULE_LICENSE("GPL"); |
294 | MODULE_DESCRIPTION("ASoC Simple Sound Card"); | |
295 | MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); |