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/device.h>
13 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/string.h>
17 #include <sound/simple_card.h>
18 #include <sound/soc-dai.h>
19 #include <sound/soc.h>
21 struct simple_card_data
{
22 struct snd_soc_card snd_card
;
23 struct simple_dai_props
{
24 struct asoc_simple_dai cpu_dai
;
25 struct asoc_simple_dai codec_dai
;
27 struct snd_soc_dai_link dai_link
[]; /* dynamically allocated */
30 static int __asoc_simple_card_dai_init(struct snd_soc_dai
*dai
,
31 struct asoc_simple_dai
*set
)
36 ret
= snd_soc_dai_set_fmt(dai
, set
->fmt
);
37 if (ret
&& ret
!= -ENOTSUPP
) {
38 dev_err(dai
->dev
, "simple-card: set_fmt error\n");
44 ret
= snd_soc_dai_set_sysclk(dai
, 0, set
->sysclk
, 0);
45 if (ret
&& ret
!= -ENOTSUPP
) {
46 dev_err(dai
->dev
, "simple-card: set_sysclk error\n");
52 ret
= snd_soc_dai_set_tdm_slot(dai
, 0, 0,
55 if (ret
&& ret
!= -ENOTSUPP
) {
56 dev_err(dai
->dev
, "simple-card: set_tdm_slot error\n");
67 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime
*rtd
)
69 struct simple_card_data
*priv
= snd_soc_card_get_drvdata(rtd
->card
);
70 struct snd_soc_dai
*codec
= rtd
->codec_dai
;
71 struct snd_soc_dai
*cpu
= rtd
->cpu_dai
;
72 struct simple_dai_props
*dai_props
;
75 num
= rtd
- rtd
->card
->rtd
;
76 dai_props
= &priv
->dai_props
[num
];
77 ret
= __asoc_simple_card_dai_init(codec
, &dai_props
->codec_dai
);
81 ret
= __asoc_simple_card_dai_init(cpu
, &dai_props
->cpu_dai
);
89 asoc_simple_card_sub_parse_of(struct device_node
*np
,
90 struct asoc_simple_dai
*dai
,
91 const struct device_node
**p_node
,
94 struct device_node
*node
;
99 * get node via "sound-dai = <&phandle port>"
100 * it will be used as xxx_of_node on soc_bind_dai_link()
102 node
= of_parse_phandle(np
, "sound-dai", 0);
108 ret
= snd_soc_of_get_dai_name(np
, name
);
113 ret
= snd_soc_of_parse_tdm_slot(np
, &dai
->slots
, &dai
->slot_width
);
118 * dai->sysclk come from
119 * "clocks = <&xxx>" (if system has common clock)
120 * or "system-clock-frequency = <xxx>"
121 * or device's module clock.
123 if (of_property_read_bool(np
, "clocks")) {
124 clk
= of_clk_get(np
, 0);
130 dai
->sysclk
= clk_get_rate(clk
);
131 } else if (of_property_read_bool(np
, "system-clock-frequency")) {
132 of_property_read_u32(np
,
133 "system-clock-frequency",
136 clk
= of_clk_get(node
, 0);
138 dai
->sysclk
= clk_get_rate(clk
);
144 static int simple_card_dai_link_of(struct device_node
*node
,
146 struct snd_soc_dai_link
*dai_link
,
147 struct simple_dai_props
*dai_props
,
148 bool is_top_level_node
)
150 struct device_node
*np
= NULL
;
151 struct device_node
*bitclkmaster
= NULL
;
152 struct device_node
*framemaster
= NULL
;
159 if (is_top_level_node
)
160 prefix
= "simple-audio-card,";
162 daifmt
= snd_soc_of_parse_daifmt(node
, prefix
,
163 &bitclkmaster
, &framemaster
);
164 daifmt
&= ~SND_SOC_DAIFMT_MASTER_MASK
;
166 snprintf(prop
, sizeof(prop
), "%scpu", prefix
);
167 np
= of_get_child_by_name(node
, prop
);
170 dev_err(dev
, "%s: Can't find %s DT node\n", __func__
, prop
);
171 goto dai_link_of_err
;
174 ret
= asoc_simple_card_sub_parse_of(np
, &dai_props
->cpu_dai
,
175 &dai_link
->cpu_of_node
,
176 &dai_link
->cpu_dai_name
);
178 goto dai_link_of_err
;
180 dai_props
->cpu_dai
.fmt
= daifmt
;
181 switch (((np
== bitclkmaster
) << 4) | (np
== framemaster
)) {
183 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFS
;
186 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFM
;
189 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFS
;
192 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFM
;
197 snprintf(prop
, sizeof(prop
), "%scodec", prefix
);
198 np
= of_get_child_by_name(node
, prop
);
201 dev_err(dev
, "%s: Can't find %s DT node\n", __func__
, prop
);
202 goto dai_link_of_err
;
205 ret
= asoc_simple_card_sub_parse_of(np
, &dai_props
->codec_dai
,
206 &dai_link
->codec_of_node
,
207 &dai_link
->codec_dai_name
);
209 goto dai_link_of_err
;
211 if (strlen(prefix
) && !bitclkmaster
&& !framemaster
) {
212 /* No dai-link level and master setting was not found from
213 sound node level, revert back to legacy DT parsing and
214 take the settings from codec node. */
215 dev_dbg(dev
, "%s: Revert to legacy daifmt parsing\n",
217 dai_props
->cpu_dai
.fmt
= dai_props
->codec_dai
.fmt
=
218 snd_soc_of_parse_daifmt(np
, NULL
, NULL
, NULL
) |
219 (daifmt
& ~SND_SOC_DAIFMT_CLOCK_MASK
);
221 dai_props
->codec_dai
.fmt
= daifmt
;
222 switch (((np
== bitclkmaster
) << 4) | (np
== framemaster
)) {
224 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFM
;
227 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFS
;
230 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFM
;
233 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFS
;
238 if (!dai_link
->cpu_dai_name
|| !dai_link
->codec_dai_name
) {
240 goto dai_link_of_err
;
243 /* simple-card assumes platform == cpu */
244 dai_link
->platform_of_node
= dai_link
->cpu_of_node
;
246 /* Link name is created from CPU/CODEC dai name */
247 name
= devm_kzalloc(dev
,
248 strlen(dai_link
->cpu_dai_name
) +
249 strlen(dai_link
->codec_dai_name
) + 2,
251 sprintf(name
, "%s-%s", dai_link
->cpu_dai_name
,
252 dai_link
->codec_dai_name
);
253 dai_link
->name
= dai_link
->stream_name
= name
;
255 dev_dbg(dev
, "\tname : %s\n", dai_link
->stream_name
);
256 dev_dbg(dev
, "\tcpu : %s / %04x / %d\n",
257 dai_link
->cpu_dai_name
,
258 dai_props
->cpu_dai
.fmt
,
259 dai_props
->cpu_dai
.sysclk
);
260 dev_dbg(dev
, "\tcodec : %s / %04x / %d\n",
261 dai_link
->codec_dai_name
,
262 dai_props
->codec_dai
.fmt
,
263 dai_props
->codec_dai
.sysclk
);
269 of_node_put(bitclkmaster
);
271 of_node_put(framemaster
);
275 static int asoc_simple_card_parse_of(struct device_node
*node
,
276 struct simple_card_data
*priv
,
280 struct snd_soc_dai_link
*dai_link
= priv
->snd_card
.dai_link
;
281 struct simple_dai_props
*dai_props
= priv
->dai_props
;
284 /* parsing the card name from DT */
285 snd_soc_of_parse_card_name(&priv
->snd_card
, "simple-audio-card,name");
287 /* off-codec widgets */
288 if (of_property_read_bool(node
, "simple-audio-card,widgets")) {
289 ret
= snd_soc_of_parse_audio_simple_widgets(&priv
->snd_card
,
290 "simple-audio-card,widgets");
296 if (of_property_read_bool(node
, "simple-audio-card,routing")) {
297 ret
= snd_soc_of_parse_audio_routing(&priv
->snd_card
,
298 "simple-audio-card,routing");
303 dev_dbg(dev
, "New simple-card: %s\n", priv
->snd_card
.name
?
304 priv
->snd_card
.name
: "");
307 struct device_node
*np
= NULL
;
309 for (i
= 0; (np
= of_get_next_child(node
, np
)); i
++) {
310 dev_dbg(dev
, "\tlink %d:\n", i
);
311 ret
= simple_card_dai_link_of(np
, dev
, dai_link
+ i
,
312 dai_props
+ i
, false);
319 ret
= simple_card_dai_link_of(node
, dev
, dai_link
, dai_props
,
325 if (!priv
->snd_card
.name
)
326 priv
->snd_card
.name
= priv
->snd_card
.dai_link
->name
;
331 /* update the reference count of the devices nodes at end of probe */
332 static int asoc_simple_card_unref(struct platform_device
*pdev
)
334 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
335 struct snd_soc_dai_link
*dai_link
;
336 struct device_node
*np
;
339 for (num_links
= 0, dai_link
= card
->dai_link
;
340 num_links
< card
->num_links
;
341 num_links
++, dai_link
++) {
342 np
= (struct device_node
*) dai_link
->cpu_of_node
;
345 np
= (struct device_node
*) dai_link
->codec_of_node
;
352 static int asoc_simple_card_probe(struct platform_device
*pdev
)
354 struct simple_card_data
*priv
;
355 struct snd_soc_dai_link
*dai_link
;
356 struct device_node
*np
= pdev
->dev
.of_node
;
357 struct device
*dev
= &pdev
->dev
;
358 int num_links
, multi
, ret
;
360 /* get the number of DAI links */
361 if (np
&& of_get_child_by_name(np
, "simple-audio-card,dai-link")) {
362 num_links
= of_get_child_count(np
);
369 /* allocate the private data and the DAI link array */
370 priv
= devm_kzalloc(dev
,
371 sizeof(*priv
) + sizeof(*dai_link
) * num_links
,
379 priv
->snd_card
.owner
= THIS_MODULE
;
380 priv
->snd_card
.dev
= dev
;
381 dai_link
= priv
->dai_link
;
382 priv
->snd_card
.dai_link
= dai_link
;
383 priv
->snd_card
.num_links
= num_links
;
385 /* get room for the other properties */
386 priv
->dai_props
= devm_kzalloc(dev
,
387 sizeof(*priv
->dai_props
) * num_links
,
389 if (!priv
->dai_props
)
392 if (np
&& of_device_is_available(np
)) {
394 ret
= asoc_simple_card_parse_of(np
, priv
, dev
, multi
);
396 if (ret
!= -EPROBE_DEFER
)
397 dev_err(dev
, "parse error %d\n", ret
);
402 * soc_bind_dai_link() will check cpu name
403 * after of_node matching if dai_link has cpu_dai_name.
404 * but, it will never match if name was created by fmt_single_name()
405 * remove cpu_dai_name to escape name matching.
408 * fmt_multiple_name()
411 dai_link
->cpu_dai_name
= NULL
;
414 struct asoc_simple_card_info
*cinfo
;
416 cinfo
= dev
->platform_data
;
418 dev_err(dev
, "no info for asoc-simple-card\n");
423 !cinfo
->codec_dai
.name
||
426 !cinfo
->cpu_dai
.name
) {
427 dev_err(dev
, "insufficient asoc_simple_card_info settings\n");
431 priv
->snd_card
.name
= (cinfo
->card
) ? cinfo
->card
: cinfo
->name
;
432 dai_link
->name
= cinfo
->name
;
433 dai_link
->stream_name
= cinfo
->name
;
434 dai_link
->platform_name
= cinfo
->platform
;
435 dai_link
->codec_name
= cinfo
->codec
;
436 dai_link
->cpu_dai_name
= cinfo
->cpu_dai
.name
;
437 dai_link
->codec_dai_name
= cinfo
->codec_dai
.name
;
438 memcpy(&priv
->dai_props
->cpu_dai
, &cinfo
->cpu_dai
,
439 sizeof(priv
->dai_props
->cpu_dai
));
440 memcpy(&priv
->dai_props
->codec_dai
, &cinfo
->codec_dai
,
441 sizeof(priv
->dai_props
->codec_dai
));
443 priv
->dai_props
->cpu_dai
.fmt
|= cinfo
->daifmt
;
444 priv
->dai_props
->codec_dai
.fmt
|= cinfo
->daifmt
;
448 * init snd_soc_dai_link
450 dai_link
->init
= asoc_simple_card_dai_init
;
452 snd_soc_card_set_drvdata(&priv
->snd_card
, priv
);
454 ret
= devm_snd_soc_register_card(&pdev
->dev
, &priv
->snd_card
);
457 asoc_simple_card_unref(pdev
);
461 static const struct of_device_id asoc_simple_of_match
[] = {
462 { .compatible
= "simple-audio-card", },
465 MODULE_DEVICE_TABLE(of
, asoc_simple_of_match
);
467 static struct platform_driver asoc_simple_card
= {
469 .name
= "asoc-simple-card",
470 .owner
= THIS_MODULE
,
471 .of_match_table
= asoc_simple_of_match
,
473 .probe
= asoc_simple_card_probe
,
476 module_platform_driver(asoc_simple_card
);
478 MODULE_ALIAS("platform:asoc-simple-card");
479 MODULE_LICENSE("GPL");
480 MODULE_DESCRIPTION("ASoC Simple Sound Card");
481 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");