2 * ASoC simple sound card support
4 * Copyright (C) 2012 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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.
11 #include <linux/clk.h>
12 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/string.h>
16 #include <sound/simple_card.h>
18 static int __asoc_simple_card_dai_init(struct snd_soc_dai
*dai
,
19 struct asoc_simple_dai
*set
,
27 ret
= snd_soc_dai_set_fmt(dai
, daifmt
);
29 if (ret
== -ENOTSUPP
) {
30 dev_dbg(dai
->dev
, "ASoC: set_fmt is not supported\n");
34 if (!ret
&& set
->sysclk
)
35 ret
= snd_soc_dai_set_sysclk(dai
, 0, set
->sysclk
, 0);
40 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime
*rtd
)
42 struct asoc_simple_card_info
*info
=
43 snd_soc_card_get_drvdata(rtd
->card
);
44 struct snd_soc_dai
*codec
= rtd
->codec_dai
;
45 struct snd_soc_dai
*cpu
= rtd
->cpu_dai
;
46 unsigned int daifmt
= info
->daifmt
;
49 ret
= __asoc_simple_card_dai_init(codec
, &info
->codec_dai
, daifmt
);
53 ret
= __asoc_simple_card_dai_init(cpu
, &info
->cpu_dai
, daifmt
);
61 asoc_simple_card_sub_parse_of(struct device_node
*np
,
62 struct asoc_simple_dai
*dai
,
63 struct device_node
**node
)
69 * get node via "sound-dai = <&phandle port>"
70 * it will be used as xxx_of_node on soc_bind_dai_link()
72 *node
= of_parse_phandle(np
, "sound-dai", 0);
77 ret
= snd_soc_of_get_dai_name(np
, &dai
->name
);
82 * bitclock-inversion, frame-inversion
83 * bitclock-master, frame-master
84 * and specific "format" if it has
86 dai
->fmt
= snd_soc_of_parse_daifmt(np
, NULL
);
89 * dai->sysclk come from
90 * "clocks = <&xxx>" (if system has common clock)
91 * or "system-clock-frequency = <xxx>"
92 * or device's module clock.
94 if (of_property_read_bool(np
, "clocks")) {
95 clk
= of_clk_get(np
, 0);
101 dai
->sysclk
= clk_get_rate(clk
);
102 } else if (of_property_read_bool(np
, "system-clock-frequency")) {
103 of_property_read_u32(np
,
104 "system-clock-frequency",
107 clk
= of_clk_get(*node
, 0);
109 dai
->sysclk
= clk_get_rate(clk
);
120 static int asoc_simple_card_parse_of(struct device_node
*node
,
121 struct asoc_simple_card_info
*info
,
123 struct device_node
**of_cpu
,
124 struct device_node
**of_codec
,
125 struct device_node
**of_platform
)
127 struct device_node
*np
;
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
);
136 if (of_property_read_bool(node
, "simple-audio-card,routing")) {
137 ret
= snd_soc_of_parse_audio_routing(&info
->snd_card
,
138 "simple-audio-card,routing");
145 np
= of_get_child_by_name(node
, "simple-audio-card,cpu");
147 ret
= asoc_simple_card_sub_parse_of(np
,
155 np
= of_get_child_by_name(node
, "simple-audio-card,codec");
157 ret
= asoc_simple_card_sub_parse_of(np
,
163 if (!info
->cpu_dai
.name
|| !info
->codec_dai
.name
)
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,
171 sprintf(name
, "%s-%s", info
->cpu_dai
.name
, info
->codec_dai
.name
);
172 info
->name
= info
->card
= name
;
174 /* simple-card assumes platform == cpu */
175 *of_platform
= *of_cpu
;
177 dev_dbg(dev
, "card-name : %s\n", info
->card
);
178 dev_dbg(dev
, "platform : %04x\n", info
->daifmt
);
179 dev_dbg(dev
, "cpu : %s / %04x / %d\n",
182 info
->cpu_dai
.sysclk
);
183 dev_dbg(dev
, "codec : %s / %04x / %d\n",
184 info
->codec_dai
.name
,
186 info
->codec_dai
.sysclk
);
191 static int asoc_simple_card_probe(struct platform_device
*pdev
)
193 struct asoc_simple_card_info
*cinfo
;
194 struct device_node
*np
= pdev
->dev
.of_node
;
195 struct device_node
*of_cpu
, *of_codec
, *of_platform
;
196 struct device
*dev
= &pdev
->dev
;
204 cinfo
= devm_kzalloc(dev
, sizeof(*cinfo
), GFP_KERNEL
);
208 if (np
&& of_device_is_available(np
)) {
209 cinfo
->snd_card
.dev
= dev
;
211 ret
= asoc_simple_card_parse_of(np
, cinfo
, dev
,
216 if (ret
!= -EPROBE_DEFER
)
217 dev_err(dev
, "parse error %d\n", ret
);
221 if (!dev
->platform_data
) {
222 dev_err(dev
, "no info for asoc-simple-card\n");
226 memcpy(cinfo
, dev
->platform_data
, sizeof(*cinfo
));
227 cinfo
->snd_card
.dev
= dev
;
232 !cinfo
->codec_dai
.name
||
233 !(cinfo
->codec
|| of_codec
) ||
234 !(cinfo
->platform
|| of_platform
) ||
235 !(cinfo
->cpu_dai
.name
|| of_cpu
)) {
236 dev_err(dev
, "insufficient asoc_simple_card_info settings\n");
241 * init snd_soc_dai_link
243 cinfo
->snd_link
.name
= cinfo
->name
;
244 cinfo
->snd_link
.stream_name
= cinfo
->name
;
245 cinfo
->snd_link
.cpu_dai_name
= cinfo
->cpu_dai
.name
;
246 cinfo
->snd_link
.platform_name
= cinfo
->platform
;
247 cinfo
->snd_link
.codec_name
= cinfo
->codec
;
248 cinfo
->snd_link
.codec_dai_name
= cinfo
->codec_dai
.name
;
249 cinfo
->snd_link
.cpu_of_node
= of_cpu
;
250 cinfo
->snd_link
.codec_of_node
= of_codec
;
251 cinfo
->snd_link
.platform_of_node
= of_platform
;
252 cinfo
->snd_link
.init
= asoc_simple_card_dai_init
;
257 cinfo
->snd_card
.name
= cinfo
->card
;
258 cinfo
->snd_card
.owner
= THIS_MODULE
;
259 cinfo
->snd_card
.dai_link
= &cinfo
->snd_link
;
260 cinfo
->snd_card
.num_links
= 1;
262 snd_soc_card_set_drvdata(&cinfo
->snd_card
, cinfo
);
264 return devm_snd_soc_register_card(&pdev
->dev
, &cinfo
->snd_card
);
267 static const struct of_device_id asoc_simple_of_match
[] = {
268 { .compatible
= "simple-audio-card", },
271 MODULE_DEVICE_TABLE(of
, asoc_simple_of_match
);
273 static struct platform_driver asoc_simple_card
= {
275 .name
= "asoc-simple-card",
276 .owner
= THIS_MODULE
,
277 .of_match_table
= asoc_simple_of_match
,
279 .probe
= asoc_simple_card_probe
,
282 module_platform_driver(asoc_simple_card
);
284 MODULE_ALIAS("platform:asoc-simple-card");
285 MODULE_LICENSE("GPL");
286 MODULE_DESCRIPTION("ASoC Simple Sound Card");
287 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");