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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, | |
201a0eac | 63 | const struct device_node **p_node) |
fa558c28 | 64 | { |
201a0eac | 65 | struct device_node *node; |
fa558c28 KM |
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 | */ | |
201a0eac JFM |
73 | node = of_parse_phandle(np, "sound-dai", 0); |
74 | if (!node) | |
fa558c28 | 75 | return -ENODEV; |
201a0eac | 76 | *p_node = node; |
fa558c28 KM |
77 | |
78 | /* get dai->name */ | |
79 | ret = snd_soc_of_get_dai_name(np, &dai->name); | |
80 | if (ret < 0) | |
81 | goto parse_error; | |
82 | ||
83 | /* | |
84 | * bitclock-inversion, frame-inversion | |
85 | * bitclock-master, frame-master | |
86 | * and specific "format" if it has | |
87 | */ | |
88 | dai->fmt = snd_soc_of_parse_daifmt(np, NULL); | |
89 | ||
90 | /* | |
91 | * dai->sysclk come from | |
92 | * "clocks = <&xxx>" (if system has common clock) | |
93 | * or "system-clock-frequency = <xxx>" | |
71467e46 | 94 | * or device's module clock. |
fa558c28 | 95 | */ |
71467e46 XL |
96 | if (of_property_read_bool(np, "clocks")) { |
97 | clk = of_clk_get(np, 0); | |
98 | if (IS_ERR(clk)) { | |
99 | ret = PTR_ERR(clk); | |
100 | goto parse_error; | |
101 | } | |
102 | ||
103 | dai->sysclk = clk_get_rate(clk); | |
104 | } else if (of_property_read_bool(np, "system-clock-frequency")) { | |
fa558c28 KM |
105 | of_property_read_u32(np, |
106 | "system-clock-frequency", | |
107 | &dai->sysclk); | |
71467e46 | 108 | } else { |
201a0eac | 109 | clk = of_clk_get(node, 0); |
e2a19ac6 XL |
110 | if (!IS_ERR(clk)) |
111 | dai->sysclk = clk_get_rate(clk); | |
71467e46 | 112 | } |
fa558c28 KM |
113 | |
114 | ret = 0; | |
115 | ||
116 | parse_error: | |
201a0eac | 117 | of_node_put(node); |
fa558c28 KM |
118 | |
119 | return ret; | |
120 | } | |
121 | ||
122 | static int asoc_simple_card_parse_of(struct device_node *node, | |
123 | struct asoc_simple_card_info *info, | |
201a0eac | 124 | struct device *dev) |
fa558c28 | 125 | { |
5ca8ba41 | 126 | struct snd_soc_dai_link *dai_link = info->snd_card.dai_link; |
fa558c28 KM |
127 | struct device_node *np; |
128 | char *name; | |
d4c22094 | 129 | int ret; |
fa558c28 KM |
130 | |
131 | /* get CPU/CODEC common format via simple-audio-card,format */ | |
132 | info->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") & | |
133 | (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK); | |
134 | ||
d4c22094 | 135 | /* DAPM routes */ |
8c0b8230 | 136 | if (of_property_read_bool(node, "simple-audio-card,routing")) { |
f87a3e82 | 137 | ret = snd_soc_of_parse_audio_routing(&info->snd_card, |
8c0b8230 | 138 | "simple-audio-card,routing"); |
f87a3e82 XL |
139 | if (ret) |
140 | return ret; | |
141 | } | |
d4c22094 | 142 | |
fa558c28 KM |
143 | /* CPU sub-node */ |
144 | ret = -EINVAL; | |
145 | np = of_get_child_by_name(node, "simple-audio-card,cpu"); | |
146 | if (np) | |
147 | ret = asoc_simple_card_sub_parse_of(np, | |
148 | &info->cpu_dai, | |
5ca8ba41 | 149 | &dai_link->cpu_of_node); |
fa558c28 KM |
150 | if (ret < 0) |
151 | return ret; | |
152 | ||
153 | /* CODEC sub-node */ | |
154 | ret = -EINVAL; | |
155 | np = of_get_child_by_name(node, "simple-audio-card,codec"); | |
156 | if (np) | |
157 | ret = asoc_simple_card_sub_parse_of(np, | |
158 | &info->codec_dai, | |
5ca8ba41 | 159 | &dai_link->codec_of_node); |
fa558c28 KM |
160 | if (ret < 0) |
161 | return ret; | |
162 | ||
dd41e0c4 XL |
163 | if (!info->cpu_dai.name || !info->codec_dai.name) |
164 | return -EINVAL; | |
165 | ||
fa558c28 KM |
166 | /* card name is created from CPU/CODEC dai name */ |
167 | name = devm_kzalloc(dev, | |
168 | strlen(info->cpu_dai.name) + | |
169 | strlen(info->codec_dai.name) + 2, | |
170 | GFP_KERNEL); | |
171 | sprintf(name, "%s-%s", info->cpu_dai.name, info->codec_dai.name); | |
2bee9914 | 172 | info->snd_card.name = name; |
5ca8ba41 | 173 | dai_link->name = dai_link->stream_name = name; |
fa558c28 KM |
174 | |
175 | /* simple-card assumes platform == cpu */ | |
5ca8ba41 | 176 | dai_link->platform_of_node = dai_link->cpu_of_node; |
fa558c28 | 177 | |
2bee9914 | 178 | dev_dbg(dev, "card-name : %s\n", name); |
fa558c28 KM |
179 | dev_dbg(dev, "platform : %04x\n", info->daifmt); |
180 | dev_dbg(dev, "cpu : %s / %04x / %d\n", | |
181 | info->cpu_dai.name, | |
182 | info->cpu_dai.fmt, | |
183 | info->cpu_dai.sysclk); | |
184 | dev_dbg(dev, "codec : %s / %04x / %d\n", | |
185 | info->codec_dai.name, | |
186 | info->codec_dai.fmt, | |
187 | info->codec_dai.sysclk); | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
f2390880 KM |
192 | static int asoc_simple_card_probe(struct platform_device *pdev) |
193 | { | |
fa558c28 | 194 | struct asoc_simple_card_info *cinfo; |
5ca8ba41 | 195 | struct snd_soc_dai_link *dai_link; |
fa558c28 | 196 | struct device_node *np = pdev->dev.of_node; |
f89983ef | 197 | struct device *dev = &pdev->dev; |
ca919fe4 | 198 | int ret; |
f2390880 | 199 | |
ca919fe4 XL |
200 | cinfo = devm_kzalloc(dev, sizeof(*cinfo), GFP_KERNEL); |
201 | if (!cinfo) | |
202 | return -ENOMEM; | |
203 | ||
201a0eac JFM |
204 | /* |
205 | * init snd_soc_card | |
206 | */ | |
207 | cinfo->snd_card.owner = THIS_MODULE; | |
208 | cinfo->snd_card.dev = dev; | |
5ca8ba41 JFM |
209 | dai_link = &cinfo->snd_link; |
210 | cinfo->snd_card.dai_link = dai_link; | |
211 | cinfo->snd_card.num_links = 1; | |
201a0eac | 212 | |
fa558c28 | 213 | if (np && of_device_is_available(np)) { |
ca919fe4 | 214 | |
201a0eac | 215 | ret = asoc_simple_card_parse_of(np, cinfo, dev); |
ca919fe4 XL |
216 | if (ret < 0) { |
217 | if (ret != -EPROBE_DEFER) | |
218 | dev_err(dev, "parse error %d\n", ret); | |
219 | return ret; | |
fa558c28 KM |
220 | } |
221 | } else { | |
ca919fe4 | 222 | if (!dev->platform_data) { |
34787d0a XL |
223 | dev_err(dev, "no info for asoc-simple-card\n"); |
224 | return -EINVAL; | |
225 | } | |
fa558c28 | 226 | |
ca919fe4 | 227 | memcpy(cinfo, dev->platform_data, sizeof(*cinfo)); |
7722f830 JFM |
228 | if (!cinfo->name || |
229 | !cinfo->card || | |
230 | !cinfo->codec_dai.name || | |
231 | !cinfo->codec || | |
232 | !cinfo->platform || | |
233 | !cinfo->cpu_dai.name) { | |
234 | dev_err(dev, "insufficient asoc_simple_card_info settings\n"); | |
235 | return -EINVAL; | |
236 | } | |
2bee9914 JFM |
237 | |
238 | cinfo->snd_card.name = cinfo->card; | |
5ca8ba41 JFM |
239 | dai_link->name = cinfo->name; |
240 | dai_link->stream_name = cinfo->name; | |
241 | dai_link->platform_name = cinfo->platform; | |
242 | dai_link->codec_name = cinfo->codec; | |
f2390880 KM |
243 | } |
244 | ||
245 | /* | |
246 | * init snd_soc_dai_link | |
247 | */ | |
5ca8ba41 JFM |
248 | dai_link->cpu_dai_name = cinfo->cpu_dai.name; |
249 | dai_link->codec_dai_name = cinfo->codec_dai.name; | |
250 | dai_link->init = asoc_simple_card_dai_init; | |
f2390880 | 251 | |
ba194a4d | 252 | snd_soc_card_set_drvdata(&cinfo->snd_card, cinfo); |
f2390880 | 253 | |
e1acb40a | 254 | return devm_snd_soc_register_card(&pdev->dev, &cinfo->snd_card); |
f2390880 KM |
255 | } |
256 | ||
fa558c28 KM |
257 | static const struct of_device_id asoc_simple_of_match[] = { |
258 | { .compatible = "simple-audio-card", }, | |
259 | {}, | |
260 | }; | |
261 | MODULE_DEVICE_TABLE(of, asoc_simple_of_match); | |
262 | ||
f2390880 KM |
263 | static struct platform_driver asoc_simple_card = { |
264 | .driver = { | |
265 | .name = "asoc-simple-card", | |
c445be35 | 266 | .owner = THIS_MODULE, |
fa558c28 | 267 | .of_match_table = asoc_simple_of_match, |
f2390880 KM |
268 | }, |
269 | .probe = asoc_simple_card_probe, | |
f2390880 KM |
270 | }; |
271 | ||
272 | module_platform_driver(asoc_simple_card); | |
273 | ||
c445be35 | 274 | MODULE_ALIAS("platform:asoc-simple-card"); |
f2390880 KM |
275 | MODULE_LICENSE("GPL"); |
276 | MODULE_DESCRIPTION("ASoC Simple Sound Card"); | |
277 | MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); |