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/gpio.h>
14 #include <linux/module.h>
16 #include <linux/of_gpio.h>
17 #include <linux/platform_device.h>
18 #include <linux/string.h>
19 #include <sound/jack.h>
20 #include <sound/simple_card.h>
21 #include <sound/soc-dai.h>
22 #include <sound/soc.h>
24 struct simple_card_data
{
25 struct snd_soc_card snd_card
;
26 struct simple_dai_props
{
27 struct asoc_simple_dai cpu_dai
;
28 struct asoc_simple_dai codec_dai
;
33 struct snd_soc_dai_link dai_link
[]; /* dynamically allocated */
36 #define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
37 #define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + i)
38 #define simple_priv_to_props(priv, i) ((priv)->dai_props + i)
40 static int asoc_simple_card_hw_params(struct snd_pcm_substream
*substream
,
41 struct snd_pcm_hw_params
*params
)
43 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
44 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
45 struct simple_card_data
*priv
= snd_soc_card_get_drvdata(rtd
->card
);
50 mclk
= params_rate(params
) * priv
->mclk_fs
;
51 ret
= snd_soc_dai_set_sysclk(codec_dai
, 0, mclk
,
58 static struct snd_soc_ops asoc_simple_card_ops
= {
59 .hw_params
= asoc_simple_card_hw_params
,
62 static struct snd_soc_jack simple_card_hp_jack
;
63 static struct snd_soc_jack_pin simple_card_hp_jack_pins
[] = {
66 .mask
= SND_JACK_HEADPHONE
,
69 static struct snd_soc_jack_gpio simple_card_hp_jack_gpio
= {
70 .name
= "Headphone detection",
71 .report
= SND_JACK_HEADPHONE
,
75 static struct snd_soc_jack simple_card_mic_jack
;
76 static struct snd_soc_jack_pin simple_card_mic_jack_pins
[] = {
79 .mask
= SND_JACK_MICROPHONE
,
82 static struct snd_soc_jack_gpio simple_card_mic_jack_gpio
= {
83 .name
= "Mic detection",
84 .report
= SND_JACK_MICROPHONE
,
88 static int __asoc_simple_card_dai_init(struct snd_soc_dai
*dai
,
89 struct asoc_simple_dai
*set
)
94 ret
= snd_soc_dai_set_fmt(dai
, set
->fmt
);
95 if (ret
&& ret
!= -ENOTSUPP
) {
96 dev_err(dai
->dev
, "simple-card: set_fmt error\n");
102 ret
= snd_soc_dai_set_sysclk(dai
, 0, set
->sysclk
, 0);
103 if (ret
&& ret
!= -ENOTSUPP
) {
104 dev_err(dai
->dev
, "simple-card: set_sysclk error\n");
110 ret
= snd_soc_dai_set_tdm_slot(dai
, 0, 0,
113 if (ret
&& ret
!= -ENOTSUPP
) {
114 dev_err(dai
->dev
, "simple-card: set_tdm_slot error\n");
125 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime
*rtd
)
127 struct simple_card_data
*priv
= snd_soc_card_get_drvdata(rtd
->card
);
128 struct snd_soc_dai
*codec
= rtd
->codec_dai
;
129 struct snd_soc_dai
*cpu
= rtd
->cpu_dai
;
130 struct simple_dai_props
*dai_props
;
133 num
= rtd
- rtd
->card
->rtd
;
134 dai_props
= &priv
->dai_props
[num
];
135 ret
= __asoc_simple_card_dai_init(codec
, &dai_props
->codec_dai
);
139 ret
= __asoc_simple_card_dai_init(cpu
, &dai_props
->cpu_dai
);
143 if (gpio_is_valid(priv
->gpio_hp_det
)) {
144 snd_soc_jack_new(codec
->codec
, "Headphones", SND_JACK_HEADPHONE
,
145 &simple_card_hp_jack
);
146 snd_soc_jack_add_pins(&simple_card_hp_jack
,
147 ARRAY_SIZE(simple_card_hp_jack_pins
),
148 simple_card_hp_jack_pins
);
150 simple_card_hp_jack_gpio
.gpio
= priv
->gpio_hp_det
;
151 snd_soc_jack_add_gpios(&simple_card_hp_jack
, 1,
152 &simple_card_hp_jack_gpio
);
155 if (gpio_is_valid(priv
->gpio_mic_det
)) {
156 snd_soc_jack_new(codec
->codec
, "Mic Jack", SND_JACK_MICROPHONE
,
157 &simple_card_mic_jack
);
158 snd_soc_jack_add_pins(&simple_card_mic_jack
,
159 ARRAY_SIZE(simple_card_mic_jack_pins
),
160 simple_card_mic_jack_pins
);
161 simple_card_mic_jack_gpio
.gpio
= priv
->gpio_mic_det
;
162 snd_soc_jack_add_gpios(&simple_card_mic_jack
, 1,
163 &simple_card_mic_jack_gpio
);
169 asoc_simple_card_sub_parse_of(struct device_node
*np
,
170 struct asoc_simple_dai
*dai
,
171 struct device_node
**p_node
,
175 struct of_phandle_args args
;
181 * Get node via "sound-dai = <&phandle port>"
182 * it will be used as xxx_of_node on soc_bind_dai_link()
184 ret
= of_parse_phandle_with_args(np
, "sound-dai",
185 "#sound-dai-cells", 0, &args
);
192 *args_count
= args
.args_count
;
195 ret
= snd_soc_of_get_dai_name(np
, name
);
200 ret
= snd_soc_of_parse_tdm_slot(np
, &dai
->slots
, &dai
->slot_width
);
205 * Parse dai->sysclk come from "clocks = <&xxx>"
206 * (if system has common clock)
207 * or "system-clock-frequency = <xxx>"
208 * or device's module clock.
210 if (of_property_read_bool(np
, "clocks")) {
211 clk
= of_clk_get(np
, 0);
217 dai
->sysclk
= clk_get_rate(clk
);
218 } else if (!of_property_read_u32(np
, "system-clock-frequency", &val
)) {
221 clk
= of_clk_get(args
.np
, 0);
223 dai
->sysclk
= clk_get_rate(clk
);
229 static int asoc_simple_card_dai_link_of(struct device_node
*node
,
230 struct simple_card_data
*priv
,
232 bool is_top_level_node
)
234 struct device
*dev
= simple_priv_to_dev(priv
);
235 struct snd_soc_dai_link
*dai_link
= simple_priv_to_link(priv
, idx
);
236 struct simple_dai_props
*dai_props
= simple_priv_to_props(priv
, idx
);
237 struct device_node
*np
= NULL
;
238 struct device_node
*bitclkmaster
= NULL
;
239 struct device_node
*framemaster
= NULL
;
246 /* For single DAI link & old style of DT node */
247 if (is_top_level_node
)
248 prefix
= "simple-audio-card,";
250 daifmt
= snd_soc_of_parse_daifmt(node
, prefix
,
251 &bitclkmaster
, &framemaster
);
252 daifmt
&= ~SND_SOC_DAIFMT_MASTER_MASK
;
254 snprintf(prop
, sizeof(prop
), "%scpu", prefix
);
255 np
= of_get_child_by_name(node
, prop
);
258 dev_err(dev
, "%s: Can't find %s DT node\n", __func__
, prop
);
259 goto dai_link_of_err
;
262 ret
= asoc_simple_card_sub_parse_of(np
, &dai_props
->cpu_dai
,
263 &dai_link
->cpu_of_node
,
264 &dai_link
->cpu_dai_name
,
267 goto dai_link_of_err
;
269 dai_props
->cpu_dai
.fmt
= daifmt
;
270 switch (((np
== bitclkmaster
) << 4) | (np
== framemaster
)) {
272 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFS
;
275 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFM
;
278 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFS
;
281 dai_props
->cpu_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFM
;
286 snprintf(prop
, sizeof(prop
), "%scodec", prefix
);
287 np
= of_get_child_by_name(node
, prop
);
290 dev_err(dev
, "%s: Can't find %s DT node\n", __func__
, prop
);
291 goto dai_link_of_err
;
294 ret
= asoc_simple_card_sub_parse_of(np
, &dai_props
->codec_dai
,
295 &dai_link
->codec_of_node
,
296 &dai_link
->codec_dai_name
, NULL
);
298 goto dai_link_of_err
;
300 if (strlen(prefix
) && !bitclkmaster
&& !framemaster
) {
302 * No DAI link level and master setting was found
303 * from sound node level, revert back to legacy DT
304 * parsing and take the settings from codec node.
306 dev_dbg(dev
, "%s: Revert to legacy daifmt parsing\n",
308 dai_props
->cpu_dai
.fmt
= dai_props
->codec_dai
.fmt
=
309 snd_soc_of_parse_daifmt(np
, NULL
, NULL
, NULL
) |
310 (daifmt
& ~SND_SOC_DAIFMT_CLOCK_MASK
);
312 dai_props
->codec_dai
.fmt
= daifmt
;
313 switch (((np
== bitclkmaster
) << 4) | (np
== framemaster
)) {
315 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFM
;
318 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBM_CFS
;
321 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFM
;
324 dai_props
->codec_dai
.fmt
|= SND_SOC_DAIFMT_CBS_CFS
;
329 if (!dai_link
->cpu_dai_name
|| !dai_link
->codec_dai_name
) {
331 goto dai_link_of_err
;
334 /* Simple Card assumes platform == cpu */
335 dai_link
->platform_of_node
= dai_link
->cpu_of_node
;
337 /* DAI link name is created from CPU/CODEC dai name */
338 name
= devm_kzalloc(dev
,
339 strlen(dai_link
->cpu_dai_name
) +
340 strlen(dai_link
->codec_dai_name
) + 2,
342 sprintf(name
, "%s-%s", dai_link
->cpu_dai_name
,
343 dai_link
->codec_dai_name
);
344 dai_link
->name
= dai_link
->stream_name
= name
;
345 dai_link
->ops
= &asoc_simple_card_ops
;
346 dai_link
->init
= asoc_simple_card_dai_init
;
348 dev_dbg(dev
, "\tname : %s\n", dai_link
->stream_name
);
349 dev_dbg(dev
, "\tcpu : %s / %04x / %d\n",
350 dai_link
->cpu_dai_name
,
351 dai_props
->cpu_dai
.fmt
,
352 dai_props
->cpu_dai
.sysclk
);
353 dev_dbg(dev
, "\tcodec : %s / %04x / %d\n",
354 dai_link
->codec_dai_name
,
355 dai_props
->codec_dai
.fmt
,
356 dai_props
->codec_dai
.sysclk
);
359 * In soc_bind_dai_link() will check cpu name after
360 * of_node matching if dai_link has cpu_dai_name.
361 * but, it will never match if name was created by
362 * fmt_single_name() remove cpu_dai_name if cpu_args
365 * fmt_multiple_name()
368 dai_link
->cpu_dai_name
= NULL
;
372 of_node_put(bitclkmaster
);
373 of_node_put(framemaster
);
377 static int asoc_simple_card_parse_of(struct device_node
*node
,
378 struct simple_card_data
*priv
)
380 struct device
*dev
= simple_priv_to_dev(priv
);
387 /* Parse the card name from DT */
388 snd_soc_of_parse_card_name(&priv
->snd_card
, "simple-audio-card,name");
390 /* The off-codec widgets */
391 if (of_property_read_bool(node
, "simple-audio-card,widgets")) {
392 ret
= snd_soc_of_parse_audio_simple_widgets(&priv
->snd_card
,
393 "simple-audio-card,widgets");
399 if (of_property_read_bool(node
, "simple-audio-card,routing")) {
400 ret
= snd_soc_of_parse_audio_routing(&priv
->snd_card
,
401 "simple-audio-card,routing");
406 /* Factor to mclk, used in hw_params() */
407 ret
= of_property_read_u32(node
, "simple-audio-card,mclk-fs", &val
);
411 dev_dbg(dev
, "New simple-card: %s\n", priv
->snd_card
.name
?
412 priv
->snd_card
.name
: "");
414 /* Single/Muti DAI link(s) & New style of DT node */
415 if (of_get_child_by_name(node
, "simple-audio-card,dai-link")) {
416 struct device_node
*np
= NULL
;
419 for_each_child_of_node(node
, np
) {
420 dev_dbg(dev
, "\tlink %d:\n", i
);
421 ret
= asoc_simple_card_dai_link_of(np
, priv
,
430 /* For single DAI link & old style of DT node */
431 ret
= asoc_simple_card_dai_link_of(node
, priv
, 0, true);
436 priv
->gpio_hp_det
= of_get_named_gpio(node
,
437 "simple-audio-card,hp-det-gpio", 0);
438 if (priv
->gpio_hp_det
== -EPROBE_DEFER
)
439 return -EPROBE_DEFER
;
441 priv
->gpio_mic_det
= of_get_named_gpio(node
,
442 "simple-audio-card,mic-det-gpio", 0);
443 if (priv
->gpio_mic_det
== -EPROBE_DEFER
)
444 return -EPROBE_DEFER
;
446 if (!priv
->snd_card
.name
)
447 priv
->snd_card
.name
= priv
->snd_card
.dai_link
->name
;
452 /* Decrease the reference count of the device nodes */
453 static int asoc_simple_card_unref(struct platform_device
*pdev
)
455 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
456 struct snd_soc_dai_link
*dai_link
;
457 struct device_node
*np
;
460 for (num_links
= 0, dai_link
= card
->dai_link
;
461 num_links
< card
->num_links
;
462 num_links
++, dai_link
++) {
463 np
= (struct device_node
*) dai_link
->cpu_of_node
;
465 np
= (struct device_node
*) dai_link
->codec_of_node
;
471 static int asoc_simple_card_probe(struct platform_device
*pdev
)
473 struct simple_card_data
*priv
;
474 struct snd_soc_dai_link
*dai_link
;
475 struct device_node
*np
= pdev
->dev
.of_node
;
476 struct device
*dev
= &pdev
->dev
;
479 /* Get the number of DAI links */
480 if (np
&& of_get_child_by_name(np
, "simple-audio-card,dai-link"))
481 num_links
= of_get_child_count(np
);
485 /* Allocate the private data and the DAI link array */
486 priv
= devm_kzalloc(dev
,
487 sizeof(*priv
) + sizeof(*dai_link
) * num_links
,
492 /* Init snd_soc_card */
493 priv
->snd_card
.owner
= THIS_MODULE
;
494 priv
->snd_card
.dev
= dev
;
495 dai_link
= priv
->dai_link
;
496 priv
->snd_card
.dai_link
= dai_link
;
497 priv
->snd_card
.num_links
= num_links
;
499 priv
->gpio_hp_det
= -ENOENT
;
500 priv
->gpio_mic_det
= -ENOENT
;
502 /* Get room for the other properties */
503 priv
->dai_props
= devm_kzalloc(dev
,
504 sizeof(*priv
->dai_props
) * num_links
,
506 if (!priv
->dai_props
)
509 if (np
&& of_device_is_available(np
)) {
511 ret
= asoc_simple_card_parse_of(np
, priv
);
513 if (ret
!= -EPROBE_DEFER
)
514 dev_err(dev
, "parse error %d\n", ret
);
519 struct asoc_simple_card_info
*cinfo
;
521 cinfo
= dev
->platform_data
;
523 dev_err(dev
, "no info for asoc-simple-card\n");
528 !cinfo
->codec_dai
.name
||
531 !cinfo
->cpu_dai
.name
) {
532 dev_err(dev
, "insufficient asoc_simple_card_info settings\n");
536 priv
->snd_card
.name
= (cinfo
->card
) ? cinfo
->card
: cinfo
->name
;
537 dai_link
->name
= cinfo
->name
;
538 dai_link
->stream_name
= cinfo
->name
;
539 dai_link
->platform_name
= cinfo
->platform
;
540 dai_link
->codec_name
= cinfo
->codec
;
541 dai_link
->cpu_dai_name
= cinfo
->cpu_dai
.name
;
542 dai_link
->codec_dai_name
= cinfo
->codec_dai
.name
;
543 dai_link
->init
= asoc_simple_card_dai_init
;
544 memcpy(&priv
->dai_props
->cpu_dai
, &cinfo
->cpu_dai
,
545 sizeof(priv
->dai_props
->cpu_dai
));
546 memcpy(&priv
->dai_props
->codec_dai
, &cinfo
->codec_dai
,
547 sizeof(priv
->dai_props
->codec_dai
));
549 priv
->dai_props
->cpu_dai
.fmt
|= cinfo
->daifmt
;
550 priv
->dai_props
->codec_dai
.fmt
|= cinfo
->daifmt
;
553 snd_soc_card_set_drvdata(&priv
->snd_card
, priv
);
555 ret
= devm_snd_soc_register_card(&pdev
->dev
, &priv
->snd_card
);
560 asoc_simple_card_unref(pdev
);
564 static int asoc_simple_card_remove(struct platform_device
*pdev
)
566 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
567 struct simple_card_data
*priv
= snd_soc_card_get_drvdata(card
);
569 if (gpio_is_valid(priv
->gpio_hp_det
))
570 snd_soc_jack_free_gpios(&simple_card_hp_jack
, 1,
571 &simple_card_hp_jack_gpio
);
572 if (gpio_is_valid(priv
->gpio_mic_det
))
573 snd_soc_jack_free_gpios(&simple_card_mic_jack
, 1,
574 &simple_card_mic_jack_gpio
);
576 return asoc_simple_card_unref(pdev
);
579 static const struct of_device_id asoc_simple_of_match
[] = {
580 { .compatible
= "simple-audio-card", },
583 MODULE_DEVICE_TABLE(of
, asoc_simple_of_match
);
585 static struct platform_driver asoc_simple_card
= {
587 .name
= "asoc-simple-card",
588 .owner
= THIS_MODULE
,
589 .of_match_table
= asoc_simple_of_match
,
591 .probe
= asoc_simple_card_probe
,
592 .remove
= asoc_simple_card_remove
,
595 module_platform_driver(asoc_simple_card
);
597 MODULE_ALIAS("platform:asoc-simple-card");
598 MODULE_LICENSE("GPL");
599 MODULE_DESCRIPTION("ASoC Simple Sound Card");
600 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");