Loading...
1// SPDX-License-Identifier: GPL-2.0
2//
3// ASoC simple sound card support
4//
5// Copyright (C) 2012 Renesas Solutions Corp.
6// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7
8#include <linux/clk.h>
9#include <linux/device.h>
10#include <linux/module.h>
11#include <linux/of.h>
12#include <linux/of_platform.h>
13#include <linux/platform_device.h>
14#include <linux/string.h>
15#include <sound/simple_card.h>
16#include <sound/soc-dai.h>
17#include <sound/soc.h>
18
19#define DPCM_SELECTABLE 1
20
21#define DAI "sound-dai"
22#define CELL "#sound-dai-cells"
23#define PREFIX "simple-audio-card,"
24
25static const struct snd_soc_ops simple_ops = {
26 .startup = simple_util_startup,
27 .shutdown = simple_util_shutdown,
28 .hw_params = simple_util_hw_params,
29};
30
31static int simple_parse_platform(struct device_node *node, struct snd_soc_dai_link_component *dlc)
32{
33 struct of_phandle_args args;
34 int ret;
35
36 if (!node)
37 return 0;
38
39 /*
40 * Get node via "sound-dai = <&phandle port>"
41 * it will be used as xxx_of_node on soc_bind_dai_link()
42 */
43 ret = of_parse_phandle_with_args(node, DAI, CELL, 0, &args);
44 if (ret)
45 return ret;
46
47 /* dai_name is not required and may not exist for plat component */
48
49 dlc->of_node = args.np;
50
51 return 0;
52}
53
54static int simple_parse_dai(struct device *dev,
55 struct device_node *node,
56 struct snd_soc_dai_link_component *dlc,
57 int *is_single_link)
58{
59 struct of_phandle_args args;
60 struct snd_soc_dai *dai;
61 int ret;
62
63 if (!node)
64 return 0;
65
66 /*
67 * Get node via "sound-dai = <&phandle port>"
68 * it will be used as xxx_of_node on soc_bind_dai_link()
69 */
70 ret = of_parse_phandle_with_args(node, DAI, CELL, 0, &args);
71 if (ret)
72 return ret;
73
74 /*
75 * Try to find from DAI args
76 */
77 dai = snd_soc_get_dai_via_args(&args);
78 if (dai) {
79 dlc->dai_name = snd_soc_dai_name_get(dai);
80 dlc->dai_args = snd_soc_copy_dai_args(dev, &args);
81 if (!dlc->dai_args)
82 return -ENOMEM;
83
84 goto parse_dai_end;
85 }
86
87 /*
88 * FIXME
89 *
90 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
91 * If user unbinded CPU or Codec driver, but not for Sound Card,
92 * dlc->dai_name is keeping unbinded CPU or Codec
93 * driver's pointer.
94 *
95 * If user re-bind CPU or Codec driver again, ALSA SoC will try
96 * to rebind Card via snd_soc_try_rebind_card(), but because of
97 * above reason, it might can't bind Sound Card.
98 * Because Sound Card is pointing to released dai_name pointer.
99 *
100 * To avoid this rebind Card issue,
101 * 1) It needs to alloc memory to keep dai_name eventhough
102 * CPU or Codec driver was unbinded, or
103 * 2) user need to rebind Sound Card everytime
104 * if he unbinded CPU or Codec.
105 */
106 ret = snd_soc_get_dlc(&args, dlc);
107 if (ret < 0)
108 return ret;
109
110parse_dai_end:
111 if (is_single_link)
112 *is_single_link = !args.args_count;
113
114 return 0;
115}
116
117static void simple_parse_convert(struct device *dev,
118 struct device_node *np,
119 struct simple_util_data *adata)
120{
121 struct device_node *top = dev->of_node;
122 struct device_node *node = of_get_parent(np);
123
124 simple_util_parse_convert(top, PREFIX, adata);
125 simple_util_parse_convert(node, PREFIX, adata);
126 simple_util_parse_convert(node, NULL, adata);
127 simple_util_parse_convert(np, NULL, adata);
128
129 of_node_put(node);
130}
131
132static void simple_parse_mclk_fs(struct device_node *top,
133 struct device_node *np,
134 struct simple_dai_props *props,
135 char *prefix)
136{
137 struct device_node *node = of_get_parent(np);
138 char prop[128];
139
140 snprintf(prop, sizeof(prop), "%smclk-fs", PREFIX);
141 of_property_read_u32(top, prop, &props->mclk_fs);
142
143 snprintf(prop, sizeof(prop), "%smclk-fs", prefix);
144 of_property_read_u32(node, prop, &props->mclk_fs);
145 of_property_read_u32(np, prop, &props->mclk_fs);
146
147 of_node_put(node);
148}
149
150static int simple_parse_node(struct simple_util_priv *priv,
151 struct device_node *np,
152 struct link_info *li,
153 char *prefix,
154 int *cpu)
155{
156 struct device *dev = simple_priv_to_dev(priv);
157 struct device_node *top = dev->of_node;
158 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
159 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
160 struct snd_soc_dai_link_component *dlc;
161 struct simple_util_dai *dai;
162 int ret;
163
164 if (cpu) {
165 dlc = snd_soc_link_to_cpu(dai_link, 0);
166 dai = simple_props_to_dai_cpu(dai_props, 0);
167 } else {
168 dlc = snd_soc_link_to_codec(dai_link, 0);
169 dai = simple_props_to_dai_codec(dai_props, 0);
170 }
171
172 simple_parse_mclk_fs(top, np, dai_props, prefix);
173
174 ret = simple_parse_dai(dev, np, dlc, cpu);
175 if (ret)
176 return ret;
177
178 ret = simple_util_parse_clk(dev, np, dai, dlc);
179 if (ret)
180 return ret;
181
182 ret = simple_util_parse_tdm(np, dai);
183 if (ret)
184 return ret;
185
186 return 0;
187}
188
189static int simple_link_init(struct simple_util_priv *priv,
190 struct device_node *node,
191 struct device_node *codec,
192 struct link_info *li,
193 char *prefix, char *name)
194{
195 struct device *dev = simple_priv_to_dev(priv);
196 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
197 int ret;
198
199 ret = simple_util_parse_daifmt(dev, node, codec,
200 prefix, &dai_link->dai_fmt);
201 if (ret < 0)
202 return 0;
203
204 dai_link->init = simple_util_dai_init;
205 dai_link->ops = &simple_ops;
206
207 return simple_util_set_dailink_name(dev, dai_link, name);
208}
209
210static int simple_dai_link_of_dpcm(struct simple_util_priv *priv,
211 struct device_node *np,
212 struct device_node *codec,
213 struct link_info *li,
214 bool is_top)
215{
216 struct device *dev = simple_priv_to_dev(priv);
217 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
218 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
219 struct device_node *top = dev->of_node;
220 struct device_node *node = of_get_parent(np);
221 char *prefix = "";
222 char dai_name[64];
223 int ret;
224
225 dev_dbg(dev, "link_of DPCM (%pOF)\n", np);
226
227 /* For single DAI link & old style of DT node */
228 if (is_top)
229 prefix = PREFIX;
230
231 if (li->cpu) {
232 struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0);
233 struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0);
234 int is_single_links = 0;
235
236 /* Codec is dummy */
237
238 /* FE settings */
239 dai_link->dynamic = 1;
240 dai_link->dpcm_merged_format = 1;
241
242 ret = simple_parse_node(priv, np, li, prefix, &is_single_links);
243 if (ret < 0)
244 goto out_put_node;
245
246 snprintf(dai_name, sizeof(dai_name), "fe.%s", cpus->dai_name);
247
248 simple_util_canonicalize_cpu(cpus, is_single_links);
249 simple_util_canonicalize_platform(platforms, cpus);
250 } else {
251 struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0);
252 struct snd_soc_codec_conf *cconf;
253
254 /* CPU is dummy */
255
256 /* BE settings */
257 dai_link->no_pcm = 1;
258 dai_link->be_hw_params_fixup = simple_util_be_hw_params_fixup;
259
260 cconf = simple_props_to_codec_conf(dai_props, 0);
261
262 ret = simple_parse_node(priv, np, li, prefix, NULL);
263 if (ret < 0)
264 goto out_put_node;
265
266 snprintf(dai_name, sizeof(dai_name), "be.%s", codecs->dai_name);
267
268 /* check "prefix" from top node */
269 snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
270 PREFIX "prefix");
271 snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node,
272 "prefix");
273 snd_soc_of_parse_node_prefix(np, cconf, codecs->of_node,
274 "prefix");
275 }
276
277 simple_parse_convert(dev, np, &dai_props->adata);
278
279 snd_soc_dai_link_set_capabilities(dai_link);
280
281 ret = simple_link_init(priv, node, codec, li, prefix, dai_name);
282
283out_put_node:
284 li->link++;
285
286 of_node_put(node);
287 return ret;
288}
289
290static int simple_dai_link_of(struct simple_util_priv *priv,
291 struct device_node *np,
292 struct device_node *codec,
293 struct link_info *li,
294 bool is_top)
295{
296 struct device *dev = simple_priv_to_dev(priv);
297 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
298 struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0);
299 struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0);
300 struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0);
301 struct device_node *cpu = NULL;
302 struct device_node *node = NULL;
303 struct device_node *plat = NULL;
304 char dai_name[64];
305 char prop[128];
306 char *prefix = "";
307 int ret, single_cpu = 0;
308
309 cpu = np;
310 node = of_get_parent(np);
311
312 dev_dbg(dev, "link_of (%pOF)\n", node);
313
314 /* For single DAI link & old style of DT node */
315 if (is_top)
316 prefix = PREFIX;
317
318 snprintf(prop, sizeof(prop), "%splat", prefix);
319 plat = of_get_child_by_name(node, prop);
320
321 ret = simple_parse_node(priv, cpu, li, prefix, &single_cpu);
322 if (ret < 0)
323 goto dai_link_of_err;
324
325 ret = simple_parse_node(priv, codec, li, prefix, NULL);
326 if (ret < 0)
327 goto dai_link_of_err;
328
329 ret = simple_parse_platform(plat, platforms);
330 if (ret < 0)
331 goto dai_link_of_err;
332
333 snprintf(dai_name, sizeof(dai_name),
334 "%s-%s", cpus->dai_name, codecs->dai_name);
335
336 simple_util_canonicalize_cpu(cpus, single_cpu);
337 simple_util_canonicalize_platform(platforms, cpus);
338
339 ret = simple_link_init(priv, node, codec, li, prefix, dai_name);
340
341dai_link_of_err:
342 of_node_put(plat);
343 of_node_put(node);
344
345 li->link++;
346
347 return ret;
348}
349
350static int __simple_for_each_link(struct simple_util_priv *priv,
351 struct link_info *li,
352 int (*func_noml)(struct simple_util_priv *priv,
353 struct device_node *np,
354 struct device_node *codec,
355 struct link_info *li, bool is_top),
356 int (*func_dpcm)(struct simple_util_priv *priv,
357 struct device_node *np,
358 struct device_node *codec,
359 struct link_info *li, bool is_top))
360{
361 struct device *dev = simple_priv_to_dev(priv);
362 struct device_node *top = dev->of_node;
363 struct device_node *node;
364 struct device_node *add_devs;
365 uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev);
366 bool is_top = 0;
367 int ret = 0;
368
369 /* Check if it has dai-link */
370 node = of_get_child_by_name(top, PREFIX "dai-link");
371 if (!node) {
372 node = of_node_get(top);
373 is_top = 1;
374 }
375
376 add_devs = of_get_child_by_name(top, PREFIX "additional-devs");
377
378 /* loop for all dai-link */
379 do {
380 struct simple_util_data adata;
381 struct device_node *codec;
382 struct device_node *plat;
383 struct device_node *np;
384 int num = of_get_child_count(node);
385
386 /* Skip additional-devs node */
387 if (node == add_devs) {
388 node = of_get_next_child(top, node);
389 continue;
390 }
391
392 /* get codec */
393 codec = of_get_child_by_name(node, is_top ?
394 PREFIX "codec" : "codec");
395 if (!codec) {
396 ret = -ENODEV;
397 goto error;
398 }
399 /* get platform */
400 plat = of_get_child_by_name(node, is_top ?
401 PREFIX "plat" : "plat");
402
403 /* get convert-xxx property */
404 memset(&adata, 0, sizeof(adata));
405 for_each_child_of_node(node, np) {
406 if (np == add_devs)
407 continue;
408 simple_parse_convert(dev, np, &adata);
409 }
410
411 /* loop for all CPU/Codec node */
412 for_each_child_of_node(node, np) {
413 if (plat == np || add_devs == np)
414 continue;
415 /*
416 * It is DPCM
417 * if it has many CPUs,
418 * or has convert-xxx property
419 */
420 if (dpcm_selectable &&
421 (num > 2 || simple_util_is_convert_required(&adata))) {
422 /*
423 * np
424 * |1(CPU)|0(Codec) li->cpu
425 * CPU |Pass |return
426 * Codec |return|Pass
427 */
428 if (li->cpu != (np == codec))
429 ret = func_dpcm(priv, np, codec, li, is_top);
430 /* else normal sound */
431 } else {
432 /*
433 * np
434 * |1(CPU)|0(Codec) li->cpu
435 * CPU |Pass |return
436 * Codec |return|return
437 */
438 if (li->cpu && (np != codec))
439 ret = func_noml(priv, np, codec, li, is_top);
440 }
441
442 if (ret < 0) {
443 of_node_put(codec);
444 of_node_put(plat);
445 of_node_put(np);
446 goto error;
447 }
448 }
449
450 of_node_put(codec);
451 of_node_put(plat);
452 node = of_get_next_child(top, node);
453 } while (!is_top && node);
454
455 error:
456 of_node_put(add_devs);
457 of_node_put(node);
458 return ret;
459}
460
461static int simple_for_each_link(struct simple_util_priv *priv,
462 struct link_info *li,
463 int (*func_noml)(struct simple_util_priv *priv,
464 struct device_node *np,
465 struct device_node *codec,
466 struct link_info *li, bool is_top),
467 int (*func_dpcm)(struct simple_util_priv *priv,
468 struct device_node *np,
469 struct device_node *codec,
470 struct link_info *li, bool is_top))
471{
472 int ret;
473 /*
474 * Detect all CPU first, and Detect all Codec 2nd.
475 *
476 * In Normal sound case, all DAIs are detected
477 * as "CPU-Codec".
478 *
479 * In DPCM sound case,
480 * all CPUs are detected as "CPU-dummy", and
481 * all Codecs are detected as "dummy-Codec".
482 * To avoid random sub-device numbering,
483 * detect "dummy-Codec" in last;
484 */
485 for (li->cpu = 1; li->cpu >= 0; li->cpu--) {
486 ret = __simple_for_each_link(priv, li, func_noml, func_dpcm);
487 if (ret < 0)
488 break;
489 }
490
491 return ret;
492}
493
494static void simple_depopulate_aux(void *data)
495{
496 struct simple_util_priv *priv = data;
497
498 of_platform_depopulate(simple_priv_to_dev(priv));
499}
500
501static int simple_populate_aux(struct simple_util_priv *priv)
502{
503 struct device *dev = simple_priv_to_dev(priv);
504 struct device_node *node;
505 int ret;
506
507 node = of_get_child_by_name(dev->of_node, PREFIX "additional-devs");
508 if (!node)
509 return 0;
510
511 ret = of_platform_populate(node, NULL, NULL, dev);
512 of_node_put(node);
513 if (ret)
514 return ret;
515
516 return devm_add_action_or_reset(dev, simple_depopulate_aux, priv);
517}
518
519static int simple_parse_of(struct simple_util_priv *priv, struct link_info *li)
520{
521 struct snd_soc_card *card = simple_priv_to_card(priv);
522 int ret;
523
524 ret = simple_util_parse_widgets(card, PREFIX);
525 if (ret < 0)
526 return ret;
527
528 ret = simple_util_parse_routing(card, PREFIX);
529 if (ret < 0)
530 return ret;
531
532 ret = simple_util_parse_pin_switches(card, PREFIX);
533 if (ret < 0)
534 return ret;
535
536 /* Single/Muti DAI link(s) & New style of DT node */
537 memset(li, 0, sizeof(*li));
538 ret = simple_for_each_link(priv, li,
539 simple_dai_link_of,
540 simple_dai_link_of_dpcm);
541 if (ret < 0)
542 return ret;
543
544 ret = simple_util_parse_card_name(card, PREFIX);
545 if (ret < 0)
546 return ret;
547
548 ret = simple_populate_aux(priv);
549 if (ret < 0)
550 return ret;
551
552 ret = snd_soc_of_parse_aux_devs(card, PREFIX "aux-devs");
553
554 return ret;
555}
556
557static int simple_count_noml(struct simple_util_priv *priv,
558 struct device_node *np,
559 struct device_node *codec,
560 struct link_info *li, bool is_top)
561{
562 if (li->link >= SNDRV_MAX_LINKS) {
563 struct device *dev = simple_priv_to_dev(priv);
564
565 dev_err(dev, "too many links\n");
566 return -EINVAL;
567 }
568
569 /*
570 * DON'T REMOVE platforms
571 *
572 * Some CPU might be using soc-generic-dmaengine-pcm. This means CPU and Platform
573 * are different Component, but are sharing same component->dev.
574 * Simple Card had been supported it without special Platform selection.
575 * We need platforms here.
576 *
577 * In case of no Platform, it will be Platform == CPU, but Platform will be
578 * ignored by snd_soc_rtd_add_component().
579 *
580 * see
581 * simple-card-utils.c :: simple_util_canonicalize_platform()
582 */
583 li->num[li->link].cpus = 1;
584 li->num[li->link].platforms = 1;
585
586 li->num[li->link].codecs = 1;
587
588 li->link += 1;
589
590 return 0;
591}
592
593static int simple_count_dpcm(struct simple_util_priv *priv,
594 struct device_node *np,
595 struct device_node *codec,
596 struct link_info *li, bool is_top)
597{
598 if (li->link >= SNDRV_MAX_LINKS) {
599 struct device *dev = simple_priv_to_dev(priv);
600
601 dev_err(dev, "too many links\n");
602 return -EINVAL;
603 }
604
605 if (li->cpu) {
606 /*
607 * DON'T REMOVE platforms
608 * see
609 * simple_count_noml()
610 */
611 li->num[li->link].cpus = 1;
612 li->num[li->link].platforms = 1;
613
614 li->link++; /* CPU-dummy */
615 } else {
616 li->num[li->link].codecs = 1;
617
618 li->link++; /* dummy-Codec */
619 }
620
621 return 0;
622}
623
624static int simple_get_dais_count(struct simple_util_priv *priv,
625 struct link_info *li)
626{
627 struct device *dev = simple_priv_to_dev(priv);
628 struct device_node *top = dev->of_node;
629
630 /*
631 * link_num : number of links.
632 * CPU-Codec / CPU-dummy / dummy-Codec
633 * dais_num : number of DAIs
634 * ccnf_num : number of codec_conf
635 * same number for "dummy-Codec"
636 *
637 * ex1)
638 * CPU0 --- Codec0 link : 5
639 * CPU1 --- Codec1 dais : 7
640 * CPU2 -/ ccnf : 1
641 * CPU3 --- Codec2
642 *
643 * => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
644 * => 7 DAIs = 4xCPU + 3xCodec
645 * => 1 ccnf = 1xdummy-Codec
646 *
647 * ex2)
648 * CPU0 --- Codec0 link : 5
649 * CPU1 --- Codec1 dais : 6
650 * CPU2 -/ ccnf : 1
651 * CPU3 -/
652 *
653 * => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
654 * => 6 DAIs = 4xCPU + 2xCodec
655 * => 1 ccnf = 1xdummy-Codec
656 *
657 * ex3)
658 * CPU0 --- Codec0 link : 6
659 * CPU1 -/ dais : 6
660 * CPU2 --- Codec1 ccnf : 2
661 * CPU3 -/
662 *
663 * => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
664 * => 6 DAIs = 4xCPU + 2xCodec
665 * => 2 ccnf = 2xdummy-Codec
666 *
667 * ex4)
668 * CPU0 --- Codec0 (convert-rate) link : 3
669 * CPU1 --- Codec1 dais : 4
670 * ccnf : 1
671 *
672 * => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
673 * => 4 DAIs = 2xCPU + 2xCodec
674 * => 1 ccnf = 1xdummy-Codec
675 */
676 if (!top) {
677 li->num[0].cpus = 1;
678 li->num[0].codecs = 1;
679 li->num[0].platforms = 1;
680
681 li->link = 1;
682 return 0;
683 }
684
685 return simple_for_each_link(priv, li,
686 simple_count_noml,
687 simple_count_dpcm);
688}
689
690static int simple_soc_probe(struct snd_soc_card *card)
691{
692 struct simple_util_priv *priv = snd_soc_card_get_drvdata(card);
693 int ret;
694
695 ret = simple_util_init_hp(card, &priv->hp_jack, PREFIX);
696 if (ret < 0)
697 return ret;
698
699 ret = simple_util_init_mic(card, &priv->mic_jack, PREFIX);
700 if (ret < 0)
701 return ret;
702
703 ret = simple_util_init_aux_jacks(priv, PREFIX);
704 if (ret < 0)
705 return ret;
706
707 return 0;
708}
709
710static int simple_probe(struct platform_device *pdev)
711{
712 struct simple_util_priv *priv;
713 struct device *dev = &pdev->dev;
714 struct device_node *np = dev->of_node;
715 struct snd_soc_card *card;
716 struct link_info *li;
717 int ret;
718
719 /* Allocate the private data and the DAI link array */
720 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
721 if (!priv)
722 return -ENOMEM;
723
724 card = simple_priv_to_card(priv);
725 card->owner = THIS_MODULE;
726 card->dev = dev;
727 card->probe = simple_soc_probe;
728 card->driver_name = "simple-card";
729
730 li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL);
731 if (!li)
732 return -ENOMEM;
733
734 ret = simple_get_dais_count(priv, li);
735 if (ret < 0)
736 return ret;
737
738 if (!li->link)
739 return -EINVAL;
740
741 ret = simple_util_init_priv(priv, li);
742 if (ret < 0)
743 return ret;
744
745 if (np && of_device_is_available(np)) {
746
747 ret = simple_parse_of(priv, li);
748 if (ret < 0) {
749 dev_err_probe(dev, ret, "parse error\n");
750 goto err;
751 }
752
753 } else {
754 struct simple_util_info *cinfo;
755 struct snd_soc_dai_link_component *cpus;
756 struct snd_soc_dai_link_component *codecs;
757 struct snd_soc_dai_link_component *platform;
758 struct snd_soc_dai_link *dai_link = priv->dai_link;
759 struct simple_dai_props *dai_props = priv->dai_props;
760
761 ret = -EINVAL;
762
763 cinfo = dev->platform_data;
764 if (!cinfo) {
765 dev_err(dev, "no info for asoc-simple-card\n");
766 goto err;
767 }
768
769 if (!cinfo->name ||
770 !cinfo->codec_dai.name ||
771 !cinfo->codec ||
772 !cinfo->platform ||
773 !cinfo->cpu_dai.name) {
774 dev_err(dev, "insufficient simple_util_info settings\n");
775 goto err;
776 }
777
778 cpus = dai_link->cpus;
779 cpus->dai_name = cinfo->cpu_dai.name;
780
781 codecs = dai_link->codecs;
782 codecs->name = cinfo->codec;
783 codecs->dai_name = cinfo->codec_dai.name;
784
785 platform = dai_link->platforms;
786 platform->name = cinfo->platform;
787
788 card->name = (cinfo->card) ? cinfo->card : cinfo->name;
789 dai_link->name = cinfo->name;
790 dai_link->stream_name = cinfo->name;
791 dai_link->dai_fmt = cinfo->daifmt;
792 dai_link->init = simple_util_dai_init;
793 memcpy(dai_props->cpu_dai, &cinfo->cpu_dai,
794 sizeof(*dai_props->cpu_dai));
795 memcpy(dai_props->codec_dai, &cinfo->codec_dai,
796 sizeof(*dai_props->codec_dai));
797 }
798
799 snd_soc_card_set_drvdata(card, priv);
800
801 simple_util_debug_info(priv);
802
803 ret = devm_snd_soc_register_card(dev, card);
804 if (ret < 0)
805 goto err;
806
807 devm_kfree(dev, li);
808 return 0;
809err:
810 simple_util_clean_reference(card);
811
812 return ret;
813}
814
815static const struct of_device_id simple_of_match[] = {
816 { .compatible = "simple-audio-card", },
817 { .compatible = "simple-scu-audio-card",
818 .data = (void *)DPCM_SELECTABLE },
819 {},
820};
821MODULE_DEVICE_TABLE(of, simple_of_match);
822
823static struct platform_driver simple_card = {
824 .driver = {
825 .name = "asoc-simple-card",
826 .pm = &snd_soc_pm_ops,
827 .of_match_table = simple_of_match,
828 },
829 .probe = simple_probe,
830 .remove_new = simple_util_remove,
831};
832
833module_platform_driver(simple_card);
834
835MODULE_ALIAS("platform:asoc-simple-card");
836MODULE_LICENSE("GPL v2");
837MODULE_DESCRIPTION("ASoC Simple Sound Card");
838MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
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 */
11#include <linux/clk.h>
12#include <linux/device.h>
13#include <linux/gpio.h>
14#include <linux/module.h>
15#include <linux/of.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>
23
24struct asoc_simple_jack {
25 struct snd_soc_jack jack;
26 struct snd_soc_jack_pin pin;
27 struct snd_soc_jack_gpio gpio;
28};
29
30struct simple_card_data {
31 struct snd_soc_card snd_card;
32 struct simple_dai_props {
33 struct asoc_simple_dai cpu_dai;
34 struct asoc_simple_dai codec_dai;
35 unsigned int mclk_fs;
36 } *dai_props;
37 unsigned int mclk_fs;
38 struct asoc_simple_jack hp_jack;
39 struct asoc_simple_jack mic_jack;
40 struct snd_soc_dai_link *dai_link;
41};
42
43#define simple_priv_to_card(priv) (&(priv)->snd_card)
44#define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
45#define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev)
46#define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i))
47
48#define DAI "sound-dai"
49#define CELL "#sound-dai-cells"
50#define PREFIX "simple-audio-card,"
51
52#define asoc_simple_card_init_hp(card, sjack, prefix)\
53 asoc_simple_card_init_jack(card, sjack, 1, prefix)
54#define asoc_simple_card_init_mic(card, sjack, prefix)\
55 asoc_simple_card_init_jack(card, sjack, 0, prefix)
56static int asoc_simple_card_init_jack(struct snd_soc_card *card,
57 struct asoc_simple_jack *sjack,
58 int is_hp, char *prefix)
59{
60 struct device *dev = card->dev;
61 enum of_gpio_flags flags;
62 char prop[128];
63 char *pin_name;
64 char *gpio_name;
65 int mask;
66 int det;
67
68 sjack->gpio.gpio = -ENOENT;
69
70 if (is_hp) {
71 snprintf(prop, sizeof(prop), "%shp-det-gpio", prefix);
72 pin_name = "Headphones";
73 gpio_name = "Headphone detection";
74 mask = SND_JACK_HEADPHONE;
75 } else {
76 snprintf(prop, sizeof(prop), "%smic-det-gpio", prefix);
77 pin_name = "Mic Jack";
78 gpio_name = "Mic detection";
79 mask = SND_JACK_MICROPHONE;
80 }
81
82 det = of_get_named_gpio_flags(dev->of_node, prop, 0, &flags);
83 if (det == -EPROBE_DEFER)
84 return -EPROBE_DEFER;
85
86 if (gpio_is_valid(det)) {
87 sjack->pin.pin = pin_name;
88 sjack->pin.mask = mask;
89
90 sjack->gpio.name = gpio_name;
91 sjack->gpio.report = mask;
92 sjack->gpio.gpio = det;
93 sjack->gpio.invert = !!(flags & OF_GPIO_ACTIVE_LOW);
94 sjack->gpio.debounce_time = 150;
95
96 snd_soc_card_jack_new(card, pin_name, mask,
97 &sjack->jack,
98 &sjack->pin, 1);
99
100 snd_soc_jack_add_gpios(&sjack->jack, 1,
101 &sjack->gpio);
102 }
103
104 return 0;
105}
106
107static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
108{
109 struct snd_soc_pcm_runtime *rtd = substream->private_data;
110 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
111 struct simple_dai_props *dai_props =
112 simple_priv_to_props(priv, rtd->num);
113 int ret;
114
115 ret = asoc_simple_card_clk_enable(&dai_props->cpu_dai);
116 if (ret)
117 return ret;
118
119 ret = asoc_simple_card_clk_enable(&dai_props->codec_dai);
120 if (ret)
121 asoc_simple_card_clk_disable(&dai_props->cpu_dai);
122
123 return ret;
124}
125
126static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
127{
128 struct snd_soc_pcm_runtime *rtd = substream->private_data;
129 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
130 struct simple_dai_props *dai_props =
131 simple_priv_to_props(priv, rtd->num);
132
133 asoc_simple_card_clk_disable(&dai_props->cpu_dai);
134
135 asoc_simple_card_clk_disable(&dai_props->codec_dai);
136}
137
138static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
139 struct snd_pcm_hw_params *params)
140{
141 struct snd_soc_pcm_runtime *rtd = substream->private_data;
142 struct snd_soc_dai *codec_dai = rtd->codec_dai;
143 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
144 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
145 struct simple_dai_props *dai_props =
146 simple_priv_to_props(priv, rtd->num);
147 unsigned int mclk, mclk_fs = 0;
148 int ret = 0;
149
150 if (priv->mclk_fs)
151 mclk_fs = priv->mclk_fs;
152 else if (dai_props->mclk_fs)
153 mclk_fs = dai_props->mclk_fs;
154
155 if (mclk_fs) {
156 mclk = params_rate(params) * mclk_fs;
157 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
158 SND_SOC_CLOCK_IN);
159 if (ret && ret != -ENOTSUPP)
160 goto err;
161
162 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
163 SND_SOC_CLOCK_OUT);
164 if (ret && ret != -ENOTSUPP)
165 goto err;
166 }
167 return 0;
168err:
169 return ret;
170}
171
172static const struct snd_soc_ops asoc_simple_card_ops = {
173 .startup = asoc_simple_card_startup,
174 .shutdown = asoc_simple_card_shutdown,
175 .hw_params = asoc_simple_card_hw_params,
176};
177
178static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
179{
180 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
181 struct snd_soc_dai *codec = rtd->codec_dai;
182 struct snd_soc_dai *cpu = rtd->cpu_dai;
183 struct simple_dai_props *dai_props =
184 simple_priv_to_props(priv, rtd->num);
185 int ret;
186
187 ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
188 if (ret < 0)
189 return ret;
190
191 ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
192 if (ret < 0)
193 return ret;
194
195 ret = asoc_simple_card_init_hp(rtd->card, &priv->hp_jack, PREFIX);
196 if (ret < 0)
197 return ret;
198
199 ret = asoc_simple_card_init_mic(rtd->card, &priv->mic_jack, PREFIX);
200 if (ret < 0)
201 return ret;
202
203 return 0;
204}
205
206static int asoc_simple_card_dai_link_of(struct device_node *node,
207 struct simple_card_data *priv,
208 int idx,
209 bool is_top_level_node)
210{
211 struct device *dev = simple_priv_to_dev(priv);
212 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
213 struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
214 struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
215 struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
216 struct device_node *cpu = NULL;
217 struct device_node *plat = NULL;
218 struct device_node *codec = NULL;
219 char prop[128];
220 char *prefix = "";
221 int ret, single_cpu;
222
223 /* For single DAI link & old style of DT node */
224 if (is_top_level_node)
225 prefix = PREFIX;
226
227 snprintf(prop, sizeof(prop), "%scpu", prefix);
228 cpu = of_get_child_by_name(node, prop);
229
230 if (!cpu) {
231 ret = -EINVAL;
232 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
233 goto dai_link_of_err;
234 }
235
236 snprintf(prop, sizeof(prop), "%splat", prefix);
237 plat = of_get_child_by_name(node, prop);
238
239 snprintf(prop, sizeof(prop), "%scodec", prefix);
240 codec = of_get_child_by_name(node, prop);
241
242 if (!codec) {
243 ret = -EINVAL;
244 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
245 goto dai_link_of_err;
246 }
247
248 ret = asoc_simple_card_parse_daifmt(dev, node, codec,
249 prefix, &dai_link->dai_fmt);
250 if (ret < 0)
251 goto dai_link_of_err;
252
253 of_property_read_u32(node, "mclk-fs", &dai_props->mclk_fs);
254
255 ret = asoc_simple_card_parse_cpu(cpu, dai_link,
256 DAI, CELL, &single_cpu);
257 if (ret < 0)
258 goto dai_link_of_err;
259
260 ret = asoc_simple_card_parse_codec(codec, dai_link, DAI, CELL);
261 if (ret < 0)
262 goto dai_link_of_err;
263
264 ret = asoc_simple_card_parse_platform(plat, dai_link, DAI, CELL);
265 if (ret < 0)
266 goto dai_link_of_err;
267
268 ret = asoc_simple_card_of_parse_tdm(cpu, cpu_dai);
269 if (ret < 0)
270 goto dai_link_of_err;
271
272 ret = asoc_simple_card_of_parse_tdm(codec, codec_dai);
273 if (ret < 0)
274 goto dai_link_of_err;
275
276 ret = asoc_simple_card_parse_clk_cpu(dev, cpu, dai_link, cpu_dai);
277 if (ret < 0)
278 goto dai_link_of_err;
279
280 ret = asoc_simple_card_parse_clk_codec(dev, codec, dai_link, codec_dai);
281 if (ret < 0)
282 goto dai_link_of_err;
283
284 ret = asoc_simple_card_canonicalize_dailink(dai_link);
285 if (ret < 0)
286 goto dai_link_of_err;
287
288 ret = asoc_simple_card_set_dailink_name(dev, dai_link,
289 "%s-%s",
290 dai_link->cpu_dai_name,
291 dai_link->codec_dai_name);
292 if (ret < 0)
293 goto dai_link_of_err;
294
295 dai_link->ops = &asoc_simple_card_ops;
296 dai_link->init = asoc_simple_card_dai_init;
297
298 asoc_simple_card_canonicalize_cpu(dai_link, single_cpu);
299
300dai_link_of_err:
301 of_node_put(cpu);
302 of_node_put(codec);
303
304 return ret;
305}
306
307static int asoc_simple_card_parse_aux_devs(struct device_node *node,
308 struct simple_card_data *priv)
309{
310 struct device *dev = simple_priv_to_dev(priv);
311 struct device_node *aux_node;
312 struct snd_soc_card *card = simple_priv_to_card(priv);
313 int i, n, len;
314
315 if (!of_find_property(node, PREFIX "aux-devs", &len))
316 return 0; /* Ok to have no aux-devs */
317
318 n = len / sizeof(__be32);
319 if (n <= 0)
320 return -EINVAL;
321
322 card->aux_dev = devm_kzalloc(dev,
323 n * sizeof(*card->aux_dev), GFP_KERNEL);
324 if (!card->aux_dev)
325 return -ENOMEM;
326
327 for (i = 0; i < n; i++) {
328 aux_node = of_parse_phandle(node, PREFIX "aux-devs", i);
329 if (!aux_node)
330 return -EINVAL;
331 card->aux_dev[i].codec_of_node = aux_node;
332 }
333
334 card->num_aux_devs = n;
335 return 0;
336}
337
338static int asoc_simple_card_parse_of(struct simple_card_data *priv)
339{
340 struct device *dev = simple_priv_to_dev(priv);
341 struct snd_soc_card *card = simple_priv_to_card(priv);
342 struct device_node *dai_link;
343 struct device_node *node = dev->of_node;
344 int ret;
345
346 if (!node)
347 return -EINVAL;
348
349 dai_link = of_get_child_by_name(node, PREFIX "dai-link");
350
351 ret = asoc_simple_card_of_parse_widgets(card, PREFIX);
352 if (ret < 0)
353 goto card_parse_end;
354
355 ret = asoc_simple_card_of_parse_routing(card, PREFIX, 1);
356 if (ret < 0)
357 goto card_parse_end;
358
359 /* Factor to mclk, used in hw_params() */
360 of_property_read_u32(node, PREFIX "mclk-fs", &priv->mclk_fs);
361
362 /* Single/Muti DAI link(s) & New style of DT node */
363 if (dai_link) {
364 struct device_node *np = NULL;
365 int i = 0;
366
367 for_each_child_of_node(node, np) {
368 dev_dbg(dev, "\tlink %d:\n", i);
369 ret = asoc_simple_card_dai_link_of(np, priv,
370 i, false);
371 if (ret < 0) {
372 of_node_put(np);
373 goto card_parse_end;
374 }
375 i++;
376 }
377 } else {
378 /* For single DAI link & old style of DT node */
379 ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
380 if (ret < 0)
381 goto card_parse_end;
382 }
383
384 ret = asoc_simple_card_parse_card_name(card, PREFIX);
385 if (ret < 0)
386 goto card_parse_end;
387
388 ret = asoc_simple_card_parse_aux_devs(node, priv);
389
390card_parse_end:
391 of_node_put(dai_link);
392
393 return ret;
394}
395
396static int asoc_simple_card_probe(struct platform_device *pdev)
397{
398 struct simple_card_data *priv;
399 struct snd_soc_dai_link *dai_link;
400 struct simple_dai_props *dai_props;
401 struct device *dev = &pdev->dev;
402 struct device_node *np = dev->of_node;
403 struct snd_soc_card *card;
404 int num, ret;
405
406 /* Get the number of DAI links */
407 if (np && of_get_child_by_name(np, PREFIX "dai-link"))
408 num = of_get_child_count(np);
409 else
410 num = 1;
411
412 /* Allocate the private data and the DAI link array */
413 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
414 if (!priv)
415 return -ENOMEM;
416
417 dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
418 dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL);
419 if (!dai_props || !dai_link)
420 return -ENOMEM;
421
422 priv->dai_props = dai_props;
423 priv->dai_link = dai_link;
424
425 /* Init snd_soc_card */
426 card = simple_priv_to_card(priv);
427 card->owner = THIS_MODULE;
428 card->dev = dev;
429 card->dai_link = priv->dai_link;
430 card->num_links = num;
431
432 if (np && of_device_is_available(np)) {
433
434 ret = asoc_simple_card_parse_of(priv);
435 if (ret < 0) {
436 if (ret != -EPROBE_DEFER)
437 dev_err(dev, "parse error %d\n", ret);
438 goto err;
439 }
440
441 } else {
442 struct asoc_simple_card_info *cinfo;
443
444 cinfo = dev->platform_data;
445 if (!cinfo) {
446 dev_err(dev, "no info for asoc-simple-card\n");
447 return -EINVAL;
448 }
449
450 if (!cinfo->name ||
451 !cinfo->codec_dai.name ||
452 !cinfo->codec ||
453 !cinfo->platform ||
454 !cinfo->cpu_dai.name) {
455 dev_err(dev, "insufficient asoc_simple_card_info settings\n");
456 return -EINVAL;
457 }
458
459 card->name = (cinfo->card) ? cinfo->card : cinfo->name;
460 dai_link->name = cinfo->name;
461 dai_link->stream_name = cinfo->name;
462 dai_link->platform_name = cinfo->platform;
463 dai_link->codec_name = cinfo->codec;
464 dai_link->cpu_dai_name = cinfo->cpu_dai.name;
465 dai_link->codec_dai_name = cinfo->codec_dai.name;
466 dai_link->dai_fmt = cinfo->daifmt;
467 dai_link->init = asoc_simple_card_dai_init;
468 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
469 sizeof(priv->dai_props->cpu_dai));
470 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
471 sizeof(priv->dai_props->codec_dai));
472 }
473
474 snd_soc_card_set_drvdata(card, priv);
475
476 ret = devm_snd_soc_register_card(dev, card);
477 if (ret < 0)
478 goto err;
479
480 return 0;
481err:
482 asoc_simple_card_clean_reference(card);
483
484 return ret;
485}
486
487static int asoc_simple_card_remove(struct platform_device *pdev)
488{
489 struct snd_soc_card *card = platform_get_drvdata(pdev);
490
491 return asoc_simple_card_clean_reference(card);
492}
493
494static const struct of_device_id asoc_simple_of_match[] = {
495 { .compatible = "simple-audio-card", },
496 {},
497};
498MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
499
500static struct platform_driver asoc_simple_card = {
501 .driver = {
502 .name = "asoc-simple-card",
503 .pm = &snd_soc_pm_ops,
504 .of_match_table = asoc_simple_of_match,
505 },
506 .probe = asoc_simple_card_probe,
507 .remove = asoc_simple_card_remove,
508};
509
510module_platform_driver(asoc_simple_card);
511
512MODULE_ALIAS("platform:asoc-simple-card");
513MODULE_LICENSE("GPL v2");
514MODULE_DESCRIPTION("ASoC Simple Sound Card");
515MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");