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 | ||
a4a2992c KM |
18 | static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai, |
19 | struct asoc_simple_dai *set, | |
20 | unsigned int daifmt) | |
21 | { | |
22 | int ret = 0; | |
23 | ||
24 | daifmt |= set->fmt; | |
25 | ||
e874ddea | 26 | if (daifmt) |
a4a2992c KM |
27 | ret = snd_soc_dai_set_fmt(dai, daifmt); |
28 | ||
e244bb9b KM |
29 | if (ret == -ENOTSUPP) { |
30 | dev_dbg(dai->dev, "ASoC: set_fmt is not supported\n"); | |
31 | ret = 0; | |
32 | } | |
33 | ||
a4a2992c KM |
34 | if (!ret && set->sysclk) |
35 | ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0); | |
36 | ||
37 | return ret; | |
38 | } | |
39 | ||
f2390880 KM |
40 | static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd) |
41 | { | |
ba194a4d XL |
42 | struct asoc_simple_card_info *info = |
43 | snd_soc_card_get_drvdata(rtd->card); | |
f2390880 KM |
44 | struct snd_soc_dai *codec = rtd->codec_dai; |
45 | struct snd_soc_dai *cpu = rtd->cpu_dai; | |
a4a2992c | 46 | unsigned int daifmt = info->daifmt; |
f2390880 KM |
47 | int ret; |
48 | ||
a4a2992c KM |
49 | ret = __asoc_simple_card_dai_init(codec, &info->codec_dai, daifmt); |
50 | if (ret < 0) | |
51 | return ret; | |
f2390880 | 52 | |
a4a2992c KM |
53 | ret = __asoc_simple_card_dai_init(cpu, &info->cpu_dai, daifmt); |
54 | if (ret < 0) | |
55 | return ret; | |
f2390880 KM |
56 | |
57 | return 0; | |
58 | } | |
59 | ||
fa558c28 KM |
60 | static int |
61 | asoc_simple_card_sub_parse_of(struct device_node *np, | |
62 | struct asoc_simple_dai *dai, | |
52008472 JFM |
63 | const struct device_node **p_node, |
64 | const char **name) | |
fa558c28 | 65 | { |
201a0eac | 66 | struct device_node *node; |
fa558c28 KM |
67 | struct clk *clk; |
68 | int ret; | |
69 | ||
70 | /* | |
71 | * get node via "sound-dai = <&phandle port>" | |
72 | * it will be used as xxx_of_node on soc_bind_dai_link() | |
73 | */ | |
201a0eac JFM |
74 | node = of_parse_phandle(np, "sound-dai", 0); |
75 | if (!node) | |
fa558c28 | 76 | return -ENODEV; |
201a0eac | 77 | *p_node = node; |
fa558c28 KM |
78 | |
79 | /* get dai->name */ | |
52008472 | 80 | ret = snd_soc_of_get_dai_name(np, name); |
fa558c28 KM |
81 | if (ret < 0) |
82 | goto parse_error; | |
83 | ||
84 | /* | |
85 | * bitclock-inversion, frame-inversion | |
86 | * bitclock-master, frame-master | |
87 | * and specific "format" if it has | |
88 | */ | |
89 | dai->fmt = snd_soc_of_parse_daifmt(np, NULL); | |
90 | ||
91 | /* | |
92 | * dai->sysclk come from | |
93 | * "clocks = <&xxx>" (if system has common clock) | |
94 | * or "system-clock-frequency = <xxx>" | |
71467e46 | 95 | * or device's module clock. |
fa558c28 | 96 | */ |
71467e46 XL |
97 | if (of_property_read_bool(np, "clocks")) { |
98 | clk = of_clk_get(np, 0); | |
99 | if (IS_ERR(clk)) { | |
100 | ret = PTR_ERR(clk); | |
101 | goto parse_error; | |
102 | } | |
103 | ||
104 | dai->sysclk = clk_get_rate(clk); | |
105 | } else if (of_property_read_bool(np, "system-clock-frequency")) { | |
fa558c28 KM |
106 | of_property_read_u32(np, |
107 | "system-clock-frequency", | |
108 | &dai->sysclk); | |
71467e46 | 109 | } else { |
201a0eac | 110 | clk = of_clk_get(node, 0); |
e2a19ac6 XL |
111 | if (!IS_ERR(clk)) |
112 | dai->sysclk = clk_get_rate(clk); | |
71467e46 | 113 | } |
fa558c28 KM |
114 | |
115 | ret = 0; | |
116 | ||
117 | parse_error: | |
201a0eac | 118 | of_node_put(node); |
fa558c28 KM |
119 | |
120 | return ret; | |
121 | } | |
122 | ||
123 | static int asoc_simple_card_parse_of(struct device_node *node, | |
124 | struct asoc_simple_card_info *info, | |
201a0eac | 125 | struct device *dev) |
fa558c28 | 126 | { |
5ca8ba41 | 127 | struct snd_soc_dai_link *dai_link = info->snd_card.dai_link; |
fa558c28 KM |
128 | struct device_node *np; |
129 | char *name; | |
d4c22094 | 130 | int ret; |
fa558c28 KM |
131 | |
132 | /* get CPU/CODEC common format via simple-audio-card,format */ | |
133 | info->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") & | |
134 | (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK); | |
135 | ||
d4c22094 | 136 | /* DAPM routes */ |
8c0b8230 | 137 | if (of_property_read_bool(node, "simple-audio-card,routing")) { |
f87a3e82 | 138 | ret = snd_soc_of_parse_audio_routing(&info->snd_card, |
8c0b8230 | 139 | "simple-audio-card,routing"); |
f87a3e82 XL |
140 | if (ret) |
141 | return ret; | |
142 | } | |
d4c22094 | 143 | |
fa558c28 KM |
144 | /* CPU sub-node */ |
145 | ret = -EINVAL; | |
146 | np = of_get_child_by_name(node, "simple-audio-card,cpu"); | |
147 | if (np) | |
148 | ret = asoc_simple_card_sub_parse_of(np, | |
149 | &info->cpu_dai, | |
52008472 JFM |
150 | &dai_link->cpu_of_node, |
151 | &dai_link->cpu_dai_name); | |
fa558c28 KM |
152 | if (ret < 0) |
153 | return ret; | |
154 | ||
155 | /* CODEC sub-node */ | |
156 | ret = -EINVAL; | |
157 | np = of_get_child_by_name(node, "simple-audio-card,codec"); | |
158 | if (np) | |
159 | ret = asoc_simple_card_sub_parse_of(np, | |
160 | &info->codec_dai, | |
52008472 JFM |
161 | &dai_link->codec_of_node, |
162 | &dai_link->codec_dai_name); | |
fa558c28 KM |
163 | if (ret < 0) |
164 | return ret; | |
165 | ||
52008472 | 166 | if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) |
dd41e0c4 XL |
167 | return -EINVAL; |
168 | ||
fa558c28 KM |
169 | /* card name is created from CPU/CODEC dai name */ |
170 | name = devm_kzalloc(dev, | |
52008472 JFM |
171 | strlen(dai_link->cpu_dai_name) + |
172 | strlen(dai_link->codec_dai_name) + 2, | |
fa558c28 | 173 | GFP_KERNEL); |
52008472 JFM |
174 | sprintf(name, "%s-%s", dai_link->cpu_dai_name, |
175 | dai_link->codec_dai_name); | |
2bee9914 | 176 | info->snd_card.name = name; |
5ca8ba41 | 177 | dai_link->name = dai_link->stream_name = name; |
fa558c28 KM |
178 | |
179 | /* simple-card assumes platform == cpu */ | |
5ca8ba41 | 180 | dai_link->platform_of_node = dai_link->cpu_of_node; |
fa558c28 | 181 | |
2bee9914 | 182 | dev_dbg(dev, "card-name : %s\n", name); |
fa558c28 KM |
183 | dev_dbg(dev, "platform : %04x\n", info->daifmt); |
184 | dev_dbg(dev, "cpu : %s / %04x / %d\n", | |
52008472 | 185 | dai_link->cpu_dai_name, |
fa558c28 KM |
186 | info->cpu_dai.fmt, |
187 | info->cpu_dai.sysclk); | |
188 | dev_dbg(dev, "codec : %s / %04x / %d\n", | |
52008472 | 189 | dai_link->codec_dai_name, |
fa558c28 KM |
190 | info->codec_dai.fmt, |
191 | info->codec_dai.sysclk); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
f2390880 KM |
196 | static int asoc_simple_card_probe(struct platform_device *pdev) |
197 | { | |
fa558c28 | 198 | struct asoc_simple_card_info *cinfo; |
5ca8ba41 | 199 | struct snd_soc_dai_link *dai_link; |
fa558c28 | 200 | struct device_node *np = pdev->dev.of_node; |
f89983ef | 201 | struct device *dev = &pdev->dev; |
ca919fe4 | 202 | int ret; |
f2390880 | 203 | |
ca919fe4 XL |
204 | cinfo = devm_kzalloc(dev, sizeof(*cinfo), GFP_KERNEL); |
205 | if (!cinfo) | |
206 | return -ENOMEM; | |
207 | ||
201a0eac JFM |
208 | /* |
209 | * init snd_soc_card | |
210 | */ | |
211 | cinfo->snd_card.owner = THIS_MODULE; | |
212 | cinfo->snd_card.dev = dev; | |
5ca8ba41 JFM |
213 | dai_link = &cinfo->snd_link; |
214 | cinfo->snd_card.dai_link = dai_link; | |
215 | cinfo->snd_card.num_links = 1; | |
201a0eac | 216 | |
fa558c28 | 217 | if (np && of_device_is_available(np)) { |
ca919fe4 | 218 | |
201a0eac | 219 | ret = asoc_simple_card_parse_of(np, cinfo, dev); |
ca919fe4 XL |
220 | if (ret < 0) { |
221 | if (ret != -EPROBE_DEFER) | |
222 | dev_err(dev, "parse error %d\n", ret); | |
223 | return ret; | |
fa558c28 KM |
224 | } |
225 | } else { | |
ca919fe4 | 226 | if (!dev->platform_data) { |
34787d0a XL |
227 | dev_err(dev, "no info for asoc-simple-card\n"); |
228 | return -EINVAL; | |
229 | } | |
fa558c28 | 230 | |
ca919fe4 | 231 | memcpy(cinfo, dev->platform_data, sizeof(*cinfo)); |
7722f830 JFM |
232 | if (!cinfo->name || |
233 | !cinfo->card || | |
234 | !cinfo->codec_dai.name || | |
235 | !cinfo->codec || | |
236 | !cinfo->platform || | |
237 | !cinfo->cpu_dai.name) { | |
238 | dev_err(dev, "insufficient asoc_simple_card_info settings\n"); | |
239 | return -EINVAL; | |
240 | } | |
2bee9914 JFM |
241 | |
242 | cinfo->snd_card.name = cinfo->card; | |
5ca8ba41 JFM |
243 | dai_link->name = cinfo->name; |
244 | dai_link->stream_name = cinfo->name; | |
245 | dai_link->platform_name = cinfo->platform; | |
246 | dai_link->codec_name = cinfo->codec; | |
52008472 JFM |
247 | dai_link->cpu_dai_name = cinfo->cpu_dai.name; |
248 | dai_link->codec_dai_name = cinfo->codec_dai.name; | |
f2390880 KM |
249 | } |
250 | ||
251 | /* | |
252 | * init snd_soc_dai_link | |
253 | */ | |
5ca8ba41 | 254 | dai_link->init = asoc_simple_card_dai_init; |
f2390880 | 255 | |
ba194a4d | 256 | snd_soc_card_set_drvdata(&cinfo->snd_card, cinfo); |
f2390880 | 257 | |
e1acb40a | 258 | return devm_snd_soc_register_card(&pdev->dev, &cinfo->snd_card); |
f2390880 KM |
259 | } |
260 | ||
fa558c28 KM |
261 | static const struct of_device_id asoc_simple_of_match[] = { |
262 | { .compatible = "simple-audio-card", }, | |
263 | {}, | |
264 | }; | |
265 | MODULE_DEVICE_TABLE(of, asoc_simple_of_match); | |
266 | ||
f2390880 KM |
267 | static struct platform_driver asoc_simple_card = { |
268 | .driver = { | |
269 | .name = "asoc-simple-card", | |
c445be35 | 270 | .owner = THIS_MODULE, |
fa558c28 | 271 | .of_match_table = asoc_simple_of_match, |
f2390880 KM |
272 | }, |
273 | .probe = asoc_simple_card_probe, | |
f2390880 KM |
274 | }; |
275 | ||
276 | module_platform_driver(asoc_simple_card); | |
277 | ||
c445be35 | 278 | MODULE_ALIAS("platform:asoc-simple-card"); |
f2390880 KM |
279 | MODULE_LICENSE("GPL"); |
280 | MODULE_DESCRIPTION("ASoC Simple Sound Card"); | |
281 | MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); |