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1// SPDX-License-Identifier: GPL-2.0
2//
3// ASoC Audio Graph Card2 support
4//
5// Copyright (C) 2020 Renesas Electronics Corp.
6// Copyright (C) 2020 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7//
8// based on ${LINUX}/sound/soc/generic/audio-graph-card.c
9#include <linux/clk.h>
10#include <linux/device.h>
11#include <linux/gpio.h>
12#include <linux/gpio/consumer.h>
13#include <linux/module.h>
14#include <linux/of.h>
15#include <linux/of_device.h>
16#include <linux/of_gpio.h>
17#include <linux/of_graph.h>
18#include <linux/platform_device.h>
19#include <linux/string.h>
20#include <sound/graph_card.h>
21
22/************************************
23 daifmt
24 ************************************
25 ports {
26 format = "left_j";
27 port@0 {
28 bitclock-master;
29 sample0: endpoint@0 {
30 frame-master;
31 };
32 sample1: endpoint@1 {
33 format = "i2s";
34 };
35 };
36 ...
37 };
38
39 You can set daifmt at ports/port/endpoint.
40 It uses *latest* format, and *share* master settings.
41 In above case,
42 sample0: left_j, bitclock-master, frame-master
43 sample1: i2s, bitclock-master
44
45 If there was no settings, *Codec* will be
46 bitclock/frame provider as default.
47 see
48 graph_parse_daifmt().
49
50 ************************************
51 Normal Audio-Graph
52 ************************************
53
54 CPU <---> Codec
55
56 sound {
57 compatible = "audio-graph-card2";
58 links = <&cpu>;
59 };
60
61 CPU {
62 cpu: port {
63 bitclock-master;
64 frame-master;
65 cpu_ep: endpoint { remote-endpoint = <&codec_ep>; }; };
66 };
67
68 Codec {
69 port { codec_ep: endpoint { remote-endpoint = <&cpu_ep>; }; };
70 };
71
72 ************************************
73 Multi-CPU/Codec
74 ************************************
75
76It has connection part (= X) and list part (= y).
77links indicates connection part of CPU side (= A).
78
79 +-+ (A) +-+
80 CPU1 --(y) | | <-(X)--(X)-> | | (y)-- Codec1
81 CPU2 --(y) | | | | (y)-- Codec2
82 +-+ +-+
83
84 sound {
85 compatible = "audio-graph-card2";
86
87(A) links = <&mcpu>;
88
89 multi {
90 ports@0 {
91(X) (A) mcpu: port@0 { mcpu0_ep: endpoint { remote-endpoint = <&mcodec0_ep>; }; };
92(y) port@1 { mcpu1_ep: endpoint { remote-endpoint = <&cpu1_ep>; }; };
93(y) port@2 { mcpu2_ep: endpoint { remote-endpoint = <&cpu2_ep>; }; };
94 };
95 ports@1 {
96(X) port@0 { mcodec0_ep: endpoint { remote-endpoint = <&mcpu0_ep>; }; };
97(y) port@1 { mcodec1_ep: endpoint { remote-endpoint = <&codec1_ep>; }; };
98(y) port@2 { mcodec2_ep: endpoint { remote-endpoint = <&codec2_ep>; }; };
99 };
100 };
101 };
102
103 CPU {
104 ports {
105 bitclock-master;
106 frame-master;
107 port@0 { cpu1_ep: endpoint { remote-endpoint = <&mcpu1_ep>; }; };
108 port@1 { cpu2_ep: endpoint { remote-endpoint = <&mcpu2_ep>; }; };
109 };
110 };
111
112 Codec {
113 ports {
114 port@0 { codec1_ep: endpoint { remote-endpoint = <&mcodec1_ep>; }; };
115 port@1 { codec2_ep: endpoint { remote-endpoint = <&mcodec2_ep>; }; };
116 };
117 };
118
119 ************************************
120 DPCM
121 ************************************
122
123 DSP
124 ************
125 PCM0 <--> * fe0 be0 * <--> DAI0: Codec Headset
126 PCM1 <--> * fe1 be1 * <--> DAI1: Codec Speakers
127 PCM2 <--> * fe2 be2 * <--> DAI2: MODEM
128 PCM3 <--> * fe3 be3 * <--> DAI3: BT
129 * be4 * <--> DAI4: DMIC
130 * be5 * <--> DAI5: FM
131 ************
132
133 sound {
134 compatible = "audio-graph-card2";
135
136 // indicate routing
137 routing = "xxx Playback", "xxx Playback",
138 "xxx Playback", "xxx Playback",
139 "xxx Playback", "xxx Playback";
140
141 // indicate all Front-End, Back-End
142 links = <&fe0, &fe1, ...,
143 &be0, &be1, ...>;
144
145 dpcm {
146 // Front-End
147 ports@0 {
148 fe0: port@0 { fe0_ep: endpoint { remote-endpoint = <&pcm0_ep>; }; };
149 fe1: port@1 { fe1_ep: endpoint { remote-endpoint = <&pcm1_ep>; }; };
150 ...
151 };
152 // Back-End
153 ports@1 {
154 be0: port@0 { be0_ep: endpoint { remote-endpoint = <&dai0_ep>; }; };
155 be1: port@1 { be1_ep: endpoint { remote-endpoint = <&dai1_ep>; }; };
156 ...
157 };
158 };
159 };
160
161 CPU {
162 ports {
163 bitclock-master;
164 frame-master;
165 port@0 { pcm0_ep: endpoint { remote-endpoint = <&fe0_ep>; }; };
166 port@1 { pcm1_ep: endpoint { remote-endpoint = <&fe1_ep>; }; };
167 ...
168 };
169 };
170
171 Codec {
172 ports {
173 port@0 { dai0_ep: endpoint { remote-endpoint = <&be0_ep>; }; };
174 port@1 { dai1_ep: endpoint { remote-endpoint = <&be1_ep>; }; };
175 ...
176 };
177 };
178
179 ************************************
180 Codec to Codec
181 ************************************
182
183 +--+
184 | |<-- Codec0 <- IN
185 | |--> Codec1 -> OUT
186 +--+
187
188 sound {
189 compatible = "audio-graph-card2";
190
191 routing = "OUT" ,"DAI1 Playback",
192 "DAI0 Capture", "IN";
193
194 links = <&c2c>;
195
196 codec2codec {
197 ports {
198 rate = <48000>;
199 c2c: port@0 { c2cf_ep: endpoint { remote-endpoint = <&codec0_ep>; }; };
200 port@1 { c2cb_ep: endpoint { remote-endpoint = <&codec1_ep>; }; };
201 };
202 };
203
204 Codec {
205 ports {
206 port@0 {
207 bitclock-master;
208 frame-master;
209 codec0_ep: endpoint { remote-endpoint = <&c2cf_ep>; }; };
210 port@1 { codec1_ep: endpoint { remote-endpoint = <&c2cb_ep>; }; };
211 };
212 };
213
214*/
215
216enum graph_type {
217 GRAPH_NORMAL,
218 GRAPH_DPCM,
219 GRAPH_C2C,
220
221 GRAPH_MULTI, /* don't use ! Use this only in __graph_get_type() */
222};
223
224#define GRAPH_NODENAME_MULTI "multi"
225#define GRAPH_NODENAME_DPCM "dpcm"
226#define GRAPH_NODENAME_C2C "codec2codec"
227
228#define port_to_endpoint(port) of_get_child_by_name(port, "endpoint")
229
230static enum graph_type __graph_get_type(struct device_node *lnk)
231{
232 struct device_node *np, *parent_np;
233 enum graph_type ret;
234
235 /*
236 * target {
237 * ports {
238 * => lnk: port@0 { ... };
239 * port@1 { ... };
240 * };
241 * };
242 */
243 np = of_get_parent(lnk);
244 if (of_node_name_eq(np, "ports")) {
245 parent_np = of_get_parent(np);
246 of_node_put(np);
247 np = parent_np;
248 }
249
250 if (of_node_name_eq(np, GRAPH_NODENAME_MULTI)) {
251 ret = GRAPH_MULTI;
252 goto out_put;
253 }
254
255 if (of_node_name_eq(np, GRAPH_NODENAME_DPCM)) {
256 ret = GRAPH_DPCM;
257 goto out_put;
258 }
259
260 if (of_node_name_eq(np, GRAPH_NODENAME_C2C)) {
261 ret = GRAPH_C2C;
262 goto out_put;
263 }
264
265 ret = GRAPH_NORMAL;
266
267out_put:
268 of_node_put(np);
269 return ret;
270
271}
272
273static enum graph_type graph_get_type(struct asoc_simple_priv *priv,
274 struct device_node *lnk)
275{
276 enum graph_type type = __graph_get_type(lnk);
277
278 /* GRAPH_MULTI here means GRAPH_NORMAL */
279 if (type == GRAPH_MULTI)
280 type = GRAPH_NORMAL;
281
282#ifdef DEBUG
283 {
284 struct device *dev = simple_priv_to_dev(priv);
285 const char *str = "Normal";
286
287 switch (type) {
288 case GRAPH_DPCM:
289 if (asoc_graph_is_ports0(lnk))
290 str = "DPCM Front-End";
291 else
292 str = "DPCM Back-End";
293 break;
294 case GRAPH_C2C:
295 str = "Codec2Codec";
296 break;
297 default:
298 break;
299 }
300
301 dev_dbg(dev, "%pOF (%s)", lnk, str);
302 }
303#endif
304 return type;
305}
306
307static int graph_lnk_is_multi(struct device_node *lnk)
308{
309 return __graph_get_type(lnk) == GRAPH_MULTI;
310}
311
312static struct device_node *graph_get_next_multi_ep(struct device_node **port)
313{
314 struct device_node *ports = of_get_parent(*port);
315 struct device_node *ep = NULL;
316 struct device_node *rep = NULL;
317
318 /*
319 * multi {
320 * ports {
321 * => lnk: port@0 { ... };
322 * port@1 { ep { ... = rep0 } };
323 * port@2 { ep { ... = rep1 } };
324 * ...
325 * };
326 * };
327 *
328 * xxx {
329 * port@0 { rep0 };
330 * port@1 { rep1 };
331 * };
332 */
333 do {
334 *port = of_get_next_child(ports, *port);
335 if (!*port)
336 break;
337 } while (!of_node_name_eq(*port, "port"));
338
339 if (*port) {
340 ep = port_to_endpoint(*port);
341 rep = of_graph_get_remote_endpoint(ep);
342 }
343
344 of_node_put(ep);
345 of_node_put(ports);
346
347 return rep;
348}
349
350static const struct snd_soc_ops graph_ops = {
351 .startup = asoc_simple_startup,
352 .shutdown = asoc_simple_shutdown,
353 .hw_params = asoc_simple_hw_params,
354};
355
356static int graph_get_dai_id(struct device_node *ep)
357{
358 struct device_node *node;
359 struct device_node *endpoint;
360 struct of_endpoint info;
361 int i, id;
362 const u32 *reg;
363 int ret;
364
365 /* use driver specified DAI ID if exist */
366 ret = snd_soc_get_dai_id(ep);
367 if (ret != -ENOTSUPP)
368 return ret;
369
370 /* use endpoint/port reg if exist */
371 ret = of_graph_parse_endpoint(ep, &info);
372 if (ret == 0) {
373 /*
374 * Because it will count port/endpoint if it doesn't have "reg".
375 * But, we can't judge whether it has "no reg", or "reg = <0>"
376 * only of_graph_parse_endpoint().
377 * We need to check "reg" property
378 */
379 if (of_get_property(ep, "reg", NULL))
380 return info.id;
381
382 node = of_get_parent(ep);
383 reg = of_get_property(node, "reg", NULL);
384 of_node_put(node);
385 if (reg)
386 return info.port;
387 }
388 node = of_graph_get_port_parent(ep);
389
390 /*
391 * Non HDMI sound case, counting port/endpoint on its DT
392 * is enough. Let's count it.
393 */
394 i = 0;
395 id = -1;
396 for_each_endpoint_of_node(node, endpoint) {
397 if (endpoint == ep)
398 id = i;
399 i++;
400 }
401
402 of_node_put(node);
403
404 if (id < 0)
405 return -ENODEV;
406
407 return id;
408}
409
410static int asoc_simple_parse_dai(struct device_node *ep,
411 struct snd_soc_dai_link_component *dlc,
412 int *is_single_link)
413{
414 struct device_node *node;
415 struct of_phandle_args args;
416 int ret;
417
418 if (!ep)
419 return 0;
420
421 node = of_graph_get_port_parent(ep);
422
423 /* Get dai->name */
424 args.np = node;
425 args.args[0] = graph_get_dai_id(ep);
426 args.args_count = (of_graph_get_endpoint_count(node) > 1);
427
428 /*
429 * FIXME
430 *
431 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
432 * If user unbinded CPU or Codec driver, but not for Sound Card,
433 * dlc->dai_name is keeping unbinded CPU or Codec
434 * driver's pointer.
435 *
436 * If user re-bind CPU or Codec driver again, ALSA SoC will try
437 * to rebind Card via snd_soc_try_rebind_card(), but because of
438 * above reason, it might can't bind Sound Card.
439 * Because Sound Card is pointing to released dai_name pointer.
440 *
441 * To avoid this rebind Card issue,
442 * 1) It needs to alloc memory to keep dai_name eventhough
443 * CPU or Codec driver was unbinded, or
444 * 2) user need to rebind Sound Card everytime
445 * if he unbinded CPU or Codec.
446 */
447 ret = snd_soc_get_dai_name(&args, &dlc->dai_name);
448 if (ret < 0) {
449 of_node_put(node);
450 return ret;
451 }
452
453 dlc->of_node = node;
454
455 if (is_single_link)
456 *is_single_link = of_graph_get_endpoint_count(node) == 1;
457
458 return 0;
459}
460
461static void graph_parse_convert(struct device_node *ep,
462 struct simple_dai_props *props)
463{
464 struct device_node *port = of_get_parent(ep);
465 struct device_node *ports = of_get_parent(port);
466 struct asoc_simple_data *adata = &props->adata;
467
468 if (of_node_name_eq(ports, "ports"))
469 asoc_simple_parse_convert(ports, NULL, adata);
470 asoc_simple_parse_convert(port, NULL, adata);
471 asoc_simple_parse_convert(ep, NULL, adata);
472
473 of_node_put(port);
474 of_node_put(ports);
475}
476
477static void graph_parse_mclk_fs(struct device_node *ep,
478 struct simple_dai_props *props)
479{
480 struct device_node *port = of_get_parent(ep);
481 struct device_node *ports = of_get_parent(port);
482
483 if (of_node_name_eq(ports, "ports"))
484 of_property_read_u32(ports, "mclk-fs", &props->mclk_fs);
485 of_property_read_u32(port, "mclk-fs", &props->mclk_fs);
486 of_property_read_u32(ep, "mclk-fs", &props->mclk_fs);
487
488 of_node_put(port);
489 of_node_put(ports);
490}
491
492static int __graph_parse_node(struct asoc_simple_priv *priv,
493 enum graph_type gtype,
494 struct device_node *ep,
495 struct link_info *li,
496 int is_cpu, int idx)
497{
498 struct device *dev = simple_priv_to_dev(priv);
499 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
500 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
501 struct snd_soc_dai_link_component *dlc;
502 struct asoc_simple_dai *dai;
503 int ret, is_single_links = 0;
504
505 if (is_cpu) {
506 dlc = asoc_link_to_cpu(dai_link, idx);
507 dai = simple_props_to_dai_cpu(dai_props, idx);
508 } else {
509 dlc = asoc_link_to_codec(dai_link, idx);
510 dai = simple_props_to_dai_codec(dai_props, idx);
511 }
512
513 graph_parse_mclk_fs(ep, dai_props);
514
515 ret = asoc_simple_parse_dai(ep, dlc, &is_single_links);
516 if (ret < 0)
517 return ret;
518
519 ret = asoc_simple_parse_tdm(ep, dai);
520 if (ret < 0)
521 return ret;
522
523 ret = asoc_simple_parse_tdm_width_map(dev, ep, dai);
524 if (ret < 0)
525 return ret;
526
527 ret = asoc_simple_parse_clk(dev, ep, dai, dlc);
528 if (ret < 0)
529 return ret;
530
531 /*
532 * set DAI Name
533 */
534 if (!dai_link->name) {
535 struct snd_soc_dai_link_component *cpus = dlc;
536 struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, idx);
537 char *cpu_multi = "";
538 char *codec_multi = "";
539
540 if (dai_link->num_cpus > 1)
541 cpu_multi = "_multi";
542 if (dai_link->num_codecs > 1)
543 codec_multi = "_multi";
544
545 switch (gtype) {
546 case GRAPH_NORMAL:
547 /* run is_cpu only. see audio_graph2_link_normal() */
548 if (is_cpu)
549 asoc_simple_set_dailink_name(dev, dai_link, "%s%s-%s%s",
550 cpus->dai_name, cpu_multi,
551 codecs->dai_name, codec_multi);
552 break;
553 case GRAPH_DPCM:
554 if (is_cpu)
555 asoc_simple_set_dailink_name(dev, dai_link, "fe.%pOFP.%s%s",
556 cpus->of_node, cpus->dai_name, cpu_multi);
557 else
558 asoc_simple_set_dailink_name(dev, dai_link, "be.%pOFP.%s%s",
559 codecs->of_node, codecs->dai_name, codec_multi);
560 break;
561 case GRAPH_C2C:
562 /* run is_cpu only. see audio_graph2_link_c2c() */
563 if (is_cpu)
564 asoc_simple_set_dailink_name(dev, dai_link, "c2c.%s%s-%s%s",
565 cpus->dai_name, cpu_multi,
566 codecs->dai_name, codec_multi);
567 break;
568 default:
569 break;
570 }
571 }
572
573 /*
574 * Check "prefix" from top node
575 * if DPCM-BE case
576 */
577 if (!is_cpu && gtype == GRAPH_DPCM) {
578 struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, idx);
579 struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, idx);
580 struct device_node *rport = of_get_parent(ep);
581 struct device_node *rports = of_get_parent(rport);
582
583 if (of_node_name_eq(rports, "ports"))
584 snd_soc_of_parse_node_prefix(rports, cconf, codecs->of_node, "prefix");
585 snd_soc_of_parse_node_prefix(rport, cconf, codecs->of_node, "prefix");
586
587 of_node_put(rport);
588 of_node_put(rports);
589 }
590
591 if (is_cpu) {
592 struct snd_soc_dai_link_component *cpus = dlc;
593 struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, idx);
594
595 asoc_simple_canonicalize_cpu(cpus, is_single_links);
596 asoc_simple_canonicalize_platform(platforms, cpus);
597 }
598
599 return 0;
600}
601
602static int graph_parse_node(struct asoc_simple_priv *priv,
603 enum graph_type gtype,
604 struct device_node *port,
605 struct link_info *li, int is_cpu)
606{
607 struct device_node *ep;
608 int ret = 0;
609
610 if (graph_lnk_is_multi(port)) {
611 int idx;
612
613 of_node_get(port);
614
615 for (idx = 0;; idx++) {
616 ep = graph_get_next_multi_ep(&port);
617 if (!ep)
618 break;
619
620 ret = __graph_parse_node(priv, gtype, ep,
621 li, is_cpu, idx);
622 of_node_put(ep);
623 if (ret < 0)
624 break;
625 }
626 } else {
627 /* Single CPU / Codec */
628 ep = port_to_endpoint(port);
629 ret = __graph_parse_node(priv, gtype, ep, li, is_cpu, 0);
630 of_node_put(ep);
631 }
632
633 return ret;
634}
635
636static void graph_parse_daifmt(struct device_node *node,
637 unsigned int *daifmt, unsigned int *bit_frame)
638{
639 unsigned int fmt;
640
641 /*
642 * see also above "daifmt" explanation
643 * and samples.
644 */
645
646 /*
647 * ports {
648 * (A)
649 * port {
650 * (B)
651 * endpoint {
652 * (C)
653 * };
654 * };
655 * };
656 * };
657 */
658
659 /*
660 * clock_provider:
661 *
662 * It can be judged it is provider
663 * if (A) or (B) or (C) has bitclock-master / frame-master flag.
664 *
665 * use "or"
666 */
667 *bit_frame |= snd_soc_daifmt_parse_clock_provider_as_bitmap(node, NULL);
668
669#define update_daifmt(name) \
670 if (!(*daifmt & SND_SOC_DAIFMT_##name##_MASK) && \
671 (fmt & SND_SOC_DAIFMT_##name##_MASK)) \
672 *daifmt |= fmt & SND_SOC_DAIFMT_##name##_MASK
673
674 /*
675 * format
676 *
677 * This function is called by (C) -> (B) -> (A) order.
678 * Set if applicable part was not yet set.
679 */
680 fmt = snd_soc_daifmt_parse_format(node, NULL);
681 update_daifmt(FORMAT);
682 update_daifmt(CLOCK);
683 update_daifmt(INV);
684}
685
686static void graph_link_init(struct asoc_simple_priv *priv,
687 struct device_node *port,
688 struct link_info *li,
689 int is_cpu_node)
690{
691 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
692 struct device_node *ep;
693 struct device_node *ports;
694 unsigned int daifmt = 0, daiclk = 0;
695 unsigned int bit_frame = 0;
696
697 if (graph_lnk_is_multi(port)) {
698 of_node_get(port);
699 ep = graph_get_next_multi_ep(&port);
700 port = of_get_parent(ep);
701 } else {
702 ep = port_to_endpoint(port);
703 }
704
705 ports = of_get_parent(port);
706
707 /*
708 * ports {
709 * (A)
710 * port {
711 * (B)
712 * endpoint {
713 * (C)
714 * };
715 * };
716 * };
717 * };
718 */
719 graph_parse_daifmt(ep, &daifmt, &bit_frame); /* (C) */
720 graph_parse_daifmt(port, &daifmt, &bit_frame); /* (B) */
721 if (of_node_name_eq(ports, "ports"))
722 graph_parse_daifmt(ports, &daifmt, &bit_frame); /* (A) */
723
724 /*
725 * convert bit_frame
726 * We need to flip clock_provider if it was CPU node,
727 * because it is Codec base.
728 */
729 daiclk = snd_soc_daifmt_clock_provider_from_bitmap(bit_frame);
730 if (is_cpu_node)
731 daiclk = snd_soc_daifmt_clock_provider_flipped(daiclk);
732
733 dai_link->dai_fmt = daifmt | daiclk;
734 dai_link->init = asoc_simple_dai_init;
735 dai_link->ops = &graph_ops;
736 if (priv->ops)
737 dai_link->ops = priv->ops;
738}
739
740int audio_graph2_link_normal(struct asoc_simple_priv *priv,
741 struct device_node *lnk,
742 struct link_info *li)
743{
744 struct device_node *cpu_port = lnk;
745 struct device_node *cpu_ep = port_to_endpoint(cpu_port);
746 struct device_node *codec_port = of_graph_get_remote_port(cpu_ep);
747 int ret;
748
749 /*
750 * call Codec first.
751 * see
752 * __graph_parse_node() :: DAI Naming
753 */
754 ret = graph_parse_node(priv, GRAPH_NORMAL, codec_port, li, 0);
755 if (ret < 0)
756 goto err;
757
758 /*
759 * call CPU, and set DAI Name
760 */
761 ret = graph_parse_node(priv, GRAPH_NORMAL, cpu_port, li, 1);
762 if (ret < 0)
763 goto err;
764
765 graph_link_init(priv, cpu_port, li, 1);
766err:
767 of_node_put(codec_port);
768 of_node_put(cpu_ep);
769
770 return ret;
771}
772EXPORT_SYMBOL_GPL(audio_graph2_link_normal);
773
774int audio_graph2_link_dpcm(struct asoc_simple_priv *priv,
775 struct device_node *lnk,
776 struct link_info *li)
777{
778 struct device_node *ep = port_to_endpoint(lnk);
779 struct device_node *rep = of_graph_get_remote_endpoint(ep);
780 struct device_node *rport = of_graph_get_remote_port(ep);
781 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
782 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
783 int is_cpu = asoc_graph_is_ports0(lnk);
784 int ret;
785
786 if (is_cpu) {
787 /*
788 * dpcm {
789 * // Front-End
790 * ports@0 {
791 * => lnk: port@0 { ep: { ... = rep }; };
792 * ...
793 * };
794 * // Back-End
795 * ports@0 {
796 * ...
797 * };
798 * };
799 *
800 * CPU {
801 * rports: ports {
802 * rport: port@0 { rep: { ... = ep } };
803 * }
804 * }
805 */
806 /*
807 * setup CPU here, Codec is already set as dummy.
808 * see
809 * asoc_simple_init_priv()
810 */
811 dai_link->dynamic = 1;
812 dai_link->dpcm_merged_format = 1;
813
814 ret = graph_parse_node(priv, GRAPH_DPCM, rport, li, 1);
815 if (ret)
816 goto err;
817 } else {
818 /*
819 * dpcm {
820 * // Front-End
821 * ports@0 {
822 * ...
823 * };
824 * // Back-End
825 * ports@0 {
826 * => lnk: port@0 { ep: { ... = rep; }; };
827 * ...
828 * };
829 * };
830 *
831 * Codec {
832 * rports: ports {
833 * rport: port@0 { rep: { ... = ep; }; };
834 * }
835 * }
836 */
837 /*
838 * setup Codec here, CPU is already set as dummy.
839 * see
840 * asoc_simple_init_priv()
841 */
842
843 /* BE settings */
844 dai_link->no_pcm = 1;
845 dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
846
847 ret = graph_parse_node(priv, GRAPH_DPCM, rport, li, 0);
848 if (ret < 0)
849 goto err;
850 }
851
852 graph_parse_convert(ep, dai_props); /* at node of <dpcm> */
853 graph_parse_convert(rep, dai_props); /* at node of <CPU/Codec> */
854
855 snd_soc_dai_link_set_capabilities(dai_link);
856
857 graph_link_init(priv, rport, li, is_cpu);
858err:
859 of_node_put(ep);
860 of_node_put(rep);
861 of_node_put(rport);
862
863 return ret;
864}
865EXPORT_SYMBOL_GPL(audio_graph2_link_dpcm);
866
867int audio_graph2_link_c2c(struct asoc_simple_priv *priv,
868 struct device_node *lnk,
869 struct link_info *li)
870{
871 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
872 struct device_node *port0, *port1, *ports;
873 struct device_node *codec0_port, *codec1_port;
874 struct device_node *ep0, *ep1;
875 u32 val = 0;
876 int ret = -EINVAL;
877
878 /*
879 * codec2codec {
880 * ports {
881 * rate = <48000>;
882 * => lnk: port@0 { c2c0_ep: { ... = codec0_ep; }; };
883 * port@1 { c2c1_ep: { ... = codec1_ep; }; };
884 * };
885 * };
886 *
887 * Codec {
888 * ports {
889 * port@0 { codec0_ep: ... }; };
890 * port@1 { codec1_ep: ... }; };
891 * };
892 * };
893 */
894 of_node_get(lnk);
895 port0 = lnk;
896 ports = of_get_parent(port0);
897 port1 = of_get_next_child(ports, lnk);
898
899 /*
900 * Card2 can use original Codec2Codec settings if DT has.
901 * It will use default settings if no settings on DT.
902 * see
903 * asoc_simple_init_for_codec2codec()
904 *
905 * Add more settings here if needed
906 */
907 of_property_read_u32(ports, "rate", &val);
908 if (val) {
909 struct device *dev = simple_priv_to_dev(priv);
910 struct snd_soc_pcm_stream *c2c_conf;
911
912 c2c_conf = devm_kzalloc(dev, sizeof(*c2c_conf), GFP_KERNEL);
913 if (!c2c_conf)
914 goto err1;
915
916 c2c_conf->formats = SNDRV_PCM_FMTBIT_S32_LE; /* update ME */
917 c2c_conf->rates = SNDRV_PCM_RATE_8000_384000;
918 c2c_conf->rate_min =
919 c2c_conf->rate_max = val;
920 c2c_conf->channels_min =
921 c2c_conf->channels_max = 2; /* update ME */
922
923 dai_link->params = c2c_conf;
924 dai_link->num_params = 1;
925 }
926
927 ep0 = port_to_endpoint(port0);
928 ep1 = port_to_endpoint(port1);
929
930 codec0_port = of_graph_get_remote_port(ep0);
931 codec1_port = of_graph_get_remote_port(ep1);
932
933 /*
934 * call Codec first.
935 * see
936 * __graph_parse_node() :: DAI Naming
937 */
938 ret = graph_parse_node(priv, GRAPH_C2C, codec1_port, li, 0);
939 if (ret < 0)
940 goto err2;
941
942 /*
943 * call CPU, and set DAI Name
944 */
945 ret = graph_parse_node(priv, GRAPH_C2C, codec0_port, li, 1);
946 if (ret < 0)
947 goto err2;
948
949 graph_link_init(priv, codec0_port, li, 1);
950err2:
951 of_node_put(ep0);
952 of_node_put(ep1);
953 of_node_put(codec0_port);
954 of_node_put(codec1_port);
955err1:
956 of_node_put(ports);
957 of_node_put(port0);
958 of_node_put(port1);
959
960 return ret;
961}
962EXPORT_SYMBOL_GPL(audio_graph2_link_c2c);
963
964static int graph_link(struct asoc_simple_priv *priv,
965 struct graph2_custom_hooks *hooks,
966 enum graph_type gtype,
967 struct device_node *lnk,
968 struct link_info *li)
969{
970 struct device *dev = simple_priv_to_dev(priv);
971 GRAPH2_CUSTOM func = NULL;
972 int ret = -EINVAL;
973
974 switch (gtype) {
975 case GRAPH_NORMAL:
976 if (hooks && hooks->custom_normal)
977 func = hooks->custom_normal;
978 else
979 func = audio_graph2_link_normal;
980 break;
981 case GRAPH_DPCM:
982 if (hooks && hooks->custom_dpcm)
983 func = hooks->custom_dpcm;
984 else
985 func = audio_graph2_link_dpcm;
986 break;
987 case GRAPH_C2C:
988 if (hooks && hooks->custom_c2c)
989 func = hooks->custom_c2c;
990 else
991 func = audio_graph2_link_c2c;
992 break;
993 default:
994 break;
995 }
996
997 if (!func) {
998 dev_err(dev, "non supported gtype (%d)\n", gtype);
999 goto err;
1000 }
1001
1002 ret = func(priv, lnk, li);
1003 if (ret < 0)
1004 goto err;
1005
1006 li->link++;
1007err:
1008 return ret;
1009}
1010
1011static int graph_counter(struct device_node *lnk)
1012{
1013 /*
1014 * Multi CPU / Codec
1015 *
1016 * multi {
1017 * ports {
1018 * => lnk: port@0 { ... };
1019 * port@1 { ... };
1020 * port@2 { ... };
1021 * ...
1022 * };
1023 * };
1024 *
1025 * ignore first lnk part
1026 */
1027 if (graph_lnk_is_multi(lnk))
1028 return of_graph_get_endpoint_count(of_get_parent(lnk)) - 1;
1029 /*
1030 * Single CPU / Codec
1031 */
1032 else
1033 return 1;
1034}
1035
1036static int graph_count_normal(struct asoc_simple_priv *priv,
1037 struct device_node *lnk,
1038 struct link_info *li)
1039{
1040 struct device_node *cpu_port = lnk;
1041 struct device_node *cpu_ep = port_to_endpoint(cpu_port);
1042 struct device_node *codec_port = of_graph_get_remote_port(cpu_ep);
1043
1044 /*
1045 * CPU {
1046 * => lnk: port { endpoint { .. }; };
1047 * };
1048 */
1049 li->num[li->link].cpus =
1050 li->num[li->link].platforms = graph_counter(cpu_port);
1051 li->num[li->link].codecs = graph_counter(codec_port);
1052
1053 of_node_put(cpu_ep);
1054 of_node_put(codec_port);
1055
1056 return 0;
1057}
1058
1059static int graph_count_dpcm(struct asoc_simple_priv *priv,
1060 struct device_node *lnk,
1061 struct link_info *li)
1062{
1063 struct device_node *ep = port_to_endpoint(lnk);
1064 struct device_node *rport = of_graph_get_remote_port(ep);
1065
1066 /*
1067 * dpcm {
1068 * // Front-End
1069 * ports@0 {
1070 * => lnk: port@0 { endpoint { ... }; };
1071 * ...
1072 * };
1073 * // Back-End
1074 * ports@1 {
1075 * => lnk: port@0 { endpoint { ... }; };
1076 * ...
1077 * };
1078 * };
1079 */
1080
1081 if (asoc_graph_is_ports0(lnk)) {
1082 li->num[li->link].cpus = graph_counter(rport); /* FE */
1083 li->num[li->link].platforms = graph_counter(rport);
1084 } else {
1085 li->num[li->link].codecs = graph_counter(rport); /* BE */
1086 }
1087
1088 of_node_put(ep);
1089 of_node_put(rport);
1090
1091 return 0;
1092}
1093
1094static int graph_count_c2c(struct asoc_simple_priv *priv,
1095 struct device_node *lnk,
1096 struct link_info *li)
1097{
1098 struct device_node *ports = of_get_parent(lnk);
1099 struct device_node *port0 = lnk;
1100 struct device_node *port1 = of_get_next_child(ports, lnk);
1101 struct device_node *ep0 = port_to_endpoint(port0);
1102 struct device_node *ep1 = port_to_endpoint(port1);
1103 struct device_node *codec0 = of_graph_get_remote_port(ep0);
1104 struct device_node *codec1 = of_graph_get_remote_port(ep1);
1105
1106 of_node_get(lnk);
1107
1108 /*
1109 * codec2codec {
1110 * ports {
1111 * => lnk: port@0 { endpoint { ... }; };
1112 * port@1 { endpoint { ... }; };
1113 * };
1114 * };
1115 */
1116 li->num[li->link].cpus =
1117 li->num[li->link].platforms = graph_counter(codec0);
1118 li->num[li->link].codecs = graph_counter(codec1);
1119
1120 of_node_put(ports);
1121 of_node_put(port1);
1122 of_node_put(ep0);
1123 of_node_put(ep1);
1124 of_node_put(codec0);
1125 of_node_put(codec1);
1126
1127 return 0;
1128}
1129
1130static int graph_count(struct asoc_simple_priv *priv,
1131 struct graph2_custom_hooks *hooks,
1132 enum graph_type gtype,
1133 struct device_node *lnk,
1134 struct link_info *li)
1135{
1136 struct device *dev = simple_priv_to_dev(priv);
1137 GRAPH2_CUSTOM func = NULL;
1138 int ret = -EINVAL;
1139
1140 if (li->link >= SNDRV_MAX_LINKS) {
1141 dev_err(dev, "too many links\n");
1142 return ret;
1143 }
1144
1145 switch (gtype) {
1146 case GRAPH_NORMAL:
1147 func = graph_count_normal;
1148 break;
1149 case GRAPH_DPCM:
1150 func = graph_count_dpcm;
1151 break;
1152 case GRAPH_C2C:
1153 func = graph_count_c2c;
1154 break;
1155 default:
1156 break;
1157 }
1158
1159 if (!func) {
1160 dev_err(dev, "non supported gtype (%d)\n", gtype);
1161 goto err;
1162 }
1163
1164 ret = func(priv, lnk, li);
1165 if (ret < 0)
1166 goto err;
1167
1168 li->link++;
1169err:
1170 return ret;
1171}
1172
1173static int graph_for_each_link(struct asoc_simple_priv *priv,
1174 struct graph2_custom_hooks *hooks,
1175 struct link_info *li,
1176 int (*func)(struct asoc_simple_priv *priv,
1177 struct graph2_custom_hooks *hooks,
1178 enum graph_type gtype,
1179 struct device_node *lnk,
1180 struct link_info *li))
1181{
1182 struct of_phandle_iterator it;
1183 struct device *dev = simple_priv_to_dev(priv);
1184 struct device_node *node = dev->of_node;
1185 struct device_node *lnk;
1186 enum graph_type gtype;
1187 int rc, ret;
1188
1189 /* loop for all listed CPU port */
1190 of_for_each_phandle(&it, rc, node, "links", NULL, 0) {
1191 lnk = it.node;
1192
1193 gtype = graph_get_type(priv, lnk);
1194
1195 ret = func(priv, hooks, gtype, lnk, li);
1196 if (ret < 0)
1197 return ret;
1198 }
1199
1200 return 0;
1201}
1202
1203int audio_graph2_parse_of(struct asoc_simple_priv *priv, struct device *dev,
1204 struct graph2_custom_hooks *hooks)
1205{
1206 struct snd_soc_card *card = simple_priv_to_card(priv);
1207 struct link_info *li;
1208 int ret;
1209
1210 li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL);
1211 if (!li)
1212 return -ENOMEM;
1213
1214 card->probe = asoc_graph_card_probe;
1215 card->owner = THIS_MODULE;
1216 card->dev = dev;
1217
1218 if ((hooks) && (hooks)->hook_pre) {
1219 ret = (hooks)->hook_pre(priv);
1220 if (ret < 0)
1221 goto err;
1222 }
1223
1224 ret = graph_for_each_link(priv, hooks, li, graph_count);
1225 if (!li->link)
1226 ret = -EINVAL;
1227 if (ret < 0)
1228 goto err;
1229
1230 ret = asoc_simple_init_priv(priv, li);
1231 if (ret < 0)
1232 goto err;
1233
1234 priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
1235 if (IS_ERR(priv->pa_gpio)) {
1236 ret = PTR_ERR(priv->pa_gpio);
1237 dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
1238 goto err;
1239 }
1240
1241 ret = asoc_simple_parse_widgets(card, NULL);
1242 if (ret < 0)
1243 goto err;
1244
1245 ret = asoc_simple_parse_routing(card, NULL);
1246 if (ret < 0)
1247 goto err;
1248
1249 memset(li, 0, sizeof(*li));
1250 ret = graph_for_each_link(priv, hooks, li, graph_link);
1251 if (ret < 0)
1252 goto err;
1253
1254 ret = asoc_simple_parse_card_name(card, NULL);
1255 if (ret < 0)
1256 goto err;
1257
1258 snd_soc_card_set_drvdata(card, priv);
1259
1260 if ((hooks) && (hooks)->hook_post) {
1261 ret = (hooks)->hook_post(priv);
1262 if (ret < 0)
1263 goto err;
1264 }
1265
1266 asoc_simple_debug_info(priv);
1267
1268 ret = devm_snd_soc_register_card(dev, card);
1269err:
1270 devm_kfree(dev, li);
1271
1272 if (ret < 0)
1273 dev_err_probe(dev, ret, "parse error\n");
1274
1275 return ret;
1276}
1277EXPORT_SYMBOL_GPL(audio_graph2_parse_of);
1278
1279static int graph_probe(struct platform_device *pdev)
1280{
1281 struct asoc_simple_priv *priv;
1282 struct device *dev = &pdev->dev;
1283
1284 /* Allocate the private data and the DAI link array */
1285 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1286 if (!priv)
1287 return -ENOMEM;
1288
1289 return audio_graph2_parse_of(priv, dev, NULL);
1290}
1291
1292static const struct of_device_id graph_of_match[] = {
1293 { .compatible = "audio-graph-card2", },
1294 {},
1295};
1296MODULE_DEVICE_TABLE(of, graph_of_match);
1297
1298static struct platform_driver graph_card = {
1299 .driver = {
1300 .name = "asoc-audio-graph-card2",
1301 .pm = &snd_soc_pm_ops,
1302 .of_match_table = graph_of_match,
1303 },
1304 .probe = graph_probe,
1305 .remove = asoc_simple_remove,
1306};
1307module_platform_driver(graph_card);
1308
1309MODULE_ALIAS("platform:asoc-audio-graph-card2");
1310MODULE_LICENSE("GPL v2");
1311MODULE_DESCRIPTION("ASoC Audio Graph Card2");
1312MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");