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
;
28 struct snd_soc_dai_link dai_link
[]; /* dynamically allocated */
31 static int asoc_simple_card_hw_params(struct snd_pcm_substream
*substream
,
32 struct snd_pcm_hw_params
*params
)
34 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
35 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
36 struct simple_card_data
*priv
= snd_soc_card_get_drvdata(rtd
->card
);
41 mclk
= params_rate(params
) * priv
->mclk_fs
;
42 ret
= snd_soc_dai_set_sysclk(codec_dai
, 0, mclk
,
49 static struct snd_soc_ops asoc_simple_card_ops
= {
50 .hw_params
= asoc_simple_card_hw_params
,
53 static int __asoc_simple_card_dai_init(struct snd_soc_dai
*dai
,
54 struct asoc_simple_dai
*set
)
59 ret
= snd_soc_dai_set_fmt(dai
, set
->fmt
);
60 if (ret
&& ret
!= -ENOTSUPP
) {
61 dev_err(dai
->dev
, "simple-card: set_fmt error\n");
67 ret
= snd_soc_dai_set_sysclk(dai
, 0, set
->sysclk
, 0);
68 if (ret
&& ret
!= -ENOTSUPP
) {
69 dev_err(dai
->dev
, "simple-card: set_sysclk error\n");
75 ret
= snd_soc_dai_set_tdm_slot(dai
, 0, 0,
78 if (ret
&& ret
!= -ENOTSUPP
) {
79 dev_err(dai
->dev
, "simple-card: set_tdm_slot error\n");
90 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime
*rtd
)
92 struct simple_card_data
*priv
= snd_soc_card_get_drvdata(rtd
->card
);
93 struct snd_soc_dai
*codec
= rtd
->codec_dai
;
94 struct snd_soc_dai
*cpu
= rtd
->cpu_dai
;
95 struct simple_dai_props
*dai_props
;
98 num
= rtd
- rtd
->card
->rtd
;
99 dai_props
= &priv
->dai_props
[num
];
100 ret
= __asoc_simple_card_dai_init(codec
, &dai_props
->codec_dai
);
104 ret
= __asoc_simple_card_dai_init(cpu
, &dai_props
->cpu_dai
);
112 asoc_simple_card_sub_parse_of(struct device_node
*np
,
113 struct asoc_simple_dai
*dai
,
114 const struct device_node
**p_node
,
117 struct device_node
*node
;
123 * get node via "sound-dai = <&phandle port>"
124 * it will be used as xxx_of_node on soc_bind_dai_link()
126 node
= of_parse_phandle(np
, "sound-dai", 0);
132 ret
= snd_soc_of_get_dai_name(np
, name
);
137 ret
= snd_soc_of_parse_tdm_slot(np
, &dai
->slots
, &dai
->slot_width
);
142 * dai->sysclk come from
143 * "clocks = <&xxx>" (if system has common clock)
144 * or "system-clock-frequency = <xxx>"
145 * or device's module clock.
147 if (of_property_read_bool(np
, "clocks")) {
148 clk
= of_clk_get(np
, 0);
154 dai
->sysclk
= clk_get_rate(clk
);
155 } else if (!of_property_read_u32(np
, "system-clock-frequency", &val
)) {
158 clk
= of_clk_get(node
, 0);
160 dai
->sysclk
= clk_get_rate(clk
);
166 static int simple_card_dai_link_of(struct device_node
*node
,
168 struct snd_soc_dai_link
*dai_link
,
169 struct simple_dai_props
*dai_props
,
170 bool is_top_level_node
)
172 struct device_node
*np
= NULL
;
173 struct device_node
*bitclkmaster
= NULL
;
174 struct device_node
*framemaster
= NULL
;
181 if (is_top_level_node
)
182 prefix
= "simple-audio-card,";
184 daifmt
= snd_soc_of_parse_daifmt(node
, prefix
,
185 &bitclkmaster
, &framemaster
);
186 daifmt
&= ~SND_SOC_DAIFMT_MASTER_MASK
;
188 snprintf(prop
, sizeof(prop
), "%scpu", prefix
);
189 np
= of_get_child_by_name(node
, prop
);
192 dev_err(dev
, "%s: Can't find %s DT node\n", __func__
, prop
);
193 goto dai_link_of_err
;
196 ret
= asoc_simple_card_sub_parse_of(np
, &dai_props
->cpu_dai
,
197 &dai_link
->cpu_of_node
,
198 &dai_link
->cpu_dai_name
);
200 goto dai_link_of_err
;
202 dai_props
->cpu_dai
.fmt
= daifmt
;
203 switch (((np
== bitclkmaster
) << 4) | (np
== framemaster
)) {
205 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFS
;
208 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFM
;
211 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFS
;
214 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFM
;
219 snprintf(prop
, sizeof(prop
), "%scodec", prefix
);
220 np
= of_get_child_by_name(node
, prop
);
223 dev_err(dev
, "%s: Can't find %s DT node\n", __func__
, prop
);
224 goto dai_link_of_err
;
227 ret
= asoc_simple_card_sub_parse_of(np
, &dai_props
->codec_dai
,
228 &dai_link
->codec_of_node
,
229 &dai_link
->codec_dai_name
);
231 goto dai_link_of_err
;
233 if (strlen(prefix
) && !bitclkmaster
&& !framemaster
) {
234 /* No dai-link level and master setting was not found from
235 sound node level, revert back to legacy DT parsing and
236 take the settings from codec node. */
237 dev_dbg(dev
, "%s: Revert to legacy daifmt parsing\n",
239 dai_props
->cpu_dai
.fmt
= dai_props
->codec_dai
.fmt
=
240 snd_soc_of_parse_daifmt(np
, NULL
, NULL
, NULL
) |
241 (daifmt
& ~SND_SOC_DAIFMT_CLOCK_MASK
);
243 dai_props
->codec_dai
.fmt
= daifmt
;
244 switch (((np
== bitclkmaster
) << 4) | (np
== framemaster
)) {
246 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFM
;
249 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFS
;
252 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFM
;
255 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFS
;
260 if (!dai_link
->cpu_dai_name
|| !dai_link
->codec_dai_name
) {
262 goto dai_link_of_err
;
265 /* simple-card assumes platform == cpu */
266 dai_link
->platform_of_node
= dai_link
->cpu_of_node
;
268 /* Link name is created from CPU/CODEC dai name */
269 name
= devm_kzalloc(dev
,
270 strlen(dai_link
->cpu_dai_name
) +
271 strlen(dai_link
->codec_dai_name
) + 2,
273 sprintf(name
, "%s-%s", dai_link
->cpu_dai_name
,
274 dai_link
->codec_dai_name
);
275 dai_link
->name
= dai_link
->stream_name
= name
;
276 dai_link
->ops
= &asoc_simple_card_ops
;
278 dev_dbg(dev
, "\tname : %s\n", dai_link
->stream_name
);
279 dev_dbg(dev
, "\tcpu : %s / %04x / %d\n",
280 dai_link
->cpu_dai_name
,
281 dai_props
->cpu_dai
.fmt
,
282 dai_props
->cpu_dai
.sysclk
);
283 dev_dbg(dev
, "\tcodec : %s / %04x / %d\n",
284 dai_link
->codec_dai_name
,
285 dai_props
->codec_dai
.fmt
,
286 dai_props
->codec_dai
.sysclk
);
292 of_node_put(bitclkmaster
);
294 of_node_put(framemaster
);
298 static int asoc_simple_card_parse_of(struct device_node
*node
,
299 struct simple_card_data
*priv
,
303 struct snd_soc_dai_link
*dai_link
= priv
->snd_card
.dai_link
;
304 struct simple_dai_props
*dai_props
= priv
->dai_props
;
308 /* parsing the card name from DT */
309 snd_soc_of_parse_card_name(&priv
->snd_card
, "simple-audio-card,name");
311 /* off-codec widgets */
312 if (of_property_read_bool(node
, "simple-audio-card,widgets")) {
313 ret
= snd_soc_of_parse_audio_simple_widgets(&priv
->snd_card
,
314 "simple-audio-card,widgets");
320 if (of_property_read_bool(node
, "simple-audio-card,routing")) {
321 ret
= snd_soc_of_parse_audio_routing(&priv
->snd_card
,
322 "simple-audio-card,routing");
327 /* Factor to mclk, used in hw_params() */
328 ret
= of_property_read_u32(node
, "simple-audio-card,mclk-fs", &val
);
332 dev_dbg(dev
, "New simple-card: %s\n", priv
->snd_card
.name
?
333 priv
->snd_card
.name
: "");
336 struct device_node
*np
= NULL
;
338 for (i
= 0; (np
= of_get_next_child(node
, np
)); i
++) {
339 dev_dbg(dev
, "\tlink %d:\n", i
);
340 ret
= simple_card_dai_link_of(np
, dev
, dai_link
+ i
,
341 dai_props
+ i
, false);
348 ret
= simple_card_dai_link_of(node
, dev
, dai_link
, dai_props
,
354 if (!priv
->snd_card
.name
)
355 priv
->snd_card
.name
= priv
->snd_card
.dai_link
->name
;
360 /* update the reference count of the devices nodes at end of probe */
361 static int asoc_simple_card_unref(struct platform_device
*pdev
)
363 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
364 struct snd_soc_dai_link
*dai_link
;
365 struct device_node
*np
;
368 for (num_links
= 0, dai_link
= card
->dai_link
;
369 num_links
< card
->num_links
;
370 num_links
++, dai_link
++) {
371 np
= (struct device_node
*) dai_link
->cpu_of_node
;
374 np
= (struct device_node
*) dai_link
->codec_of_node
;
381 static int asoc_simple_card_probe(struct platform_device
*pdev
)
383 struct simple_card_data
*priv
;
384 struct snd_soc_dai_link
*dai_link
;
385 struct device_node
*np
= pdev
->dev
.of_node
;
386 struct device
*dev
= &pdev
->dev
;
387 int num_links
, multi
, ret
;
389 /* get the number of DAI links */
390 if (np
&& of_get_child_by_name(np
, "simple-audio-card,dai-link")) {
391 num_links
= of_get_child_count(np
);
398 /* allocate the private data and the DAI link array */
399 priv
= devm_kzalloc(dev
,
400 sizeof(*priv
) + sizeof(*dai_link
) * num_links
,
408 priv
->snd_card
.owner
= THIS_MODULE
;
409 priv
->snd_card
.dev
= dev
;
410 dai_link
= priv
->dai_link
;
411 priv
->snd_card
.dai_link
= dai_link
;
412 priv
->snd_card
.num_links
= num_links
;
414 /* get room for the other properties */
415 priv
->dai_props
= devm_kzalloc(dev
,
416 sizeof(*priv
->dai_props
) * num_links
,
418 if (!priv
->dai_props
)
421 if (np
&& of_device_is_available(np
)) {
423 ret
= asoc_simple_card_parse_of(np
, priv
, dev
, multi
);
425 if (ret
!= -EPROBE_DEFER
)
426 dev_err(dev
, "parse error %d\n", ret
);
431 * soc_bind_dai_link() will check cpu name
432 * after of_node matching if dai_link has cpu_dai_name.
433 * but, it will never match if name was created by fmt_single_name()
434 * remove cpu_dai_name to escape name matching.
437 * fmt_multiple_name()
440 dai_link
->cpu_dai_name
= NULL
;
443 struct asoc_simple_card_info
*cinfo
;
445 cinfo
= dev
->platform_data
;
447 dev_err(dev
, "no info for asoc-simple-card\n");
452 !cinfo
->codec_dai
.name
||
455 !cinfo
->cpu_dai
.name
) {
456 dev_err(dev
, "insufficient asoc_simple_card_info settings\n");
460 priv
->snd_card
.name
= (cinfo
->card
) ? cinfo
->card
: cinfo
->name
;
461 dai_link
->name
= cinfo
->name
;
462 dai_link
->stream_name
= cinfo
->name
;
463 dai_link
->platform_name
= cinfo
->platform
;
464 dai_link
->codec_name
= cinfo
->codec
;
465 dai_link
->cpu_dai_name
= cinfo
->cpu_dai
.name
;
466 dai_link
->codec_dai_name
= cinfo
->codec_dai
.name
;
467 memcpy(&priv
->dai_props
->cpu_dai
, &cinfo
->cpu_dai
,
468 sizeof(priv
->dai_props
->cpu_dai
));
469 memcpy(&priv
->dai_props
->codec_dai
, &cinfo
->codec_dai
,
470 sizeof(priv
->dai_props
->codec_dai
));
472 priv
->dai_props
->cpu_dai
.fmt
|= cinfo
->daifmt
;
473 priv
->dai_props
->codec_dai
.fmt
|= cinfo
->daifmt
;
477 * init snd_soc_dai_link
479 dai_link
->init
= asoc_simple_card_dai_init
;
481 snd_soc_card_set_drvdata(&priv
->snd_card
, priv
);
483 ret
= devm_snd_soc_register_card(&pdev
->dev
, &priv
->snd_card
);
488 asoc_simple_card_unref(pdev
);
492 static int asoc_simple_card_remove(struct platform_device
*pdev
)
494 return asoc_simple_card_unref(pdev
);
497 static const struct of_device_id asoc_simple_of_match
[] = {
498 { .compatible
= "simple-audio-card", },
501 MODULE_DEVICE_TABLE(of
, asoc_simple_of_match
);
503 static struct platform_driver asoc_simple_card
= {
505 .name
= "asoc-simple-card",
506 .owner
= THIS_MODULE
,
507 .of_match_table
= asoc_simple_of_match
,
509 .probe
= asoc_simple_card_probe
,
510 .remove
= asoc_simple_card_remove
,
513 module_platform_driver(asoc_simple_card
);
515 MODULE_ALIAS("platform:asoc-simple-card");
516 MODULE_LICENSE("GPL");
517 MODULE_DESCRIPTION("ASoC Simple Sound Card");
518 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");