• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // ASoC audio graph sound card support
4 //
5 // Copyright (C) 2016 Renesas Solutions Corp.
6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 //
8 // based on ${LINUX}/sound/soc/generic/simple-card.c
9 
10 #include <linux/clk.h>
11 #include <linux/device.h>
12 #include <linux/gpio.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/module.h>
15 #include <linux/of.h>
16 #include <linux/of_device.h>
17 #include <linux/of_gpio.h>
18 #include <linux/of_graph.h>
19 #include <linux/platform_device.h>
20 #include <linux/string.h>
21 #include <sound/simple_card_utils.h>
22 
23 #define DPCM_SELECTABLE 1
24 
25 #define PREFIX	"audio-graph-card,"
26 
graph_outdrv_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)27 static int graph_outdrv_event(struct snd_soc_dapm_widget *w,
28 			      struct snd_kcontrol *kcontrol,
29 			      int event)
30 {
31 	struct snd_soc_dapm_context *dapm = w->dapm;
32 	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(dapm->card);
33 
34 	switch (event) {
35 	case SND_SOC_DAPM_POST_PMU:
36 		gpiod_set_value_cansleep(priv->pa_gpio, 1);
37 		break;
38 	case SND_SOC_DAPM_PRE_PMD:
39 		gpiod_set_value_cansleep(priv->pa_gpio, 0);
40 		break;
41 	default:
42 		return -EINVAL;
43 	}
44 
45 	return 0;
46 }
47 
48 static const struct snd_soc_dapm_widget graph_dapm_widgets[] = {
49 	SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
50 			       0, 0, NULL, 0, graph_outdrv_event,
51 			       SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
52 };
53 
54 static const struct snd_soc_ops graph_ops = {
55 	.startup	= asoc_simple_startup,
56 	.shutdown	= asoc_simple_shutdown,
57 	.hw_params	= asoc_simple_hw_params,
58 };
59 
graph_get_dai_id(struct device_node * ep)60 static int graph_get_dai_id(struct device_node *ep)
61 {
62 	struct device_node *node;
63 	struct device_node *endpoint;
64 	struct of_endpoint info;
65 	int i, id;
66 	const u32 *reg;
67 	int ret;
68 
69 	/* use driver specified DAI ID if exist */
70 	ret = snd_soc_get_dai_id(ep);
71 	if (ret != -ENOTSUPP)
72 		return ret;
73 
74 	/* use endpoint/port reg if exist */
75 	ret = of_graph_parse_endpoint(ep, &info);
76 	if (ret == 0) {
77 		/*
78 		 * Because it will count port/endpoint if it doesn't have "reg".
79 		 * But, we can't judge whether it has "no reg", or "reg = <0>"
80 		 * only of_graph_parse_endpoint().
81 		 * We need to check "reg" property
82 		 */
83 		if (of_get_property(ep,   "reg", NULL))
84 			return info.id;
85 
86 		node = of_get_parent(ep);
87 		reg = of_get_property(node, "reg", NULL);
88 		of_node_put(node);
89 		if (reg)
90 			return info.port;
91 	}
92 	node = of_graph_get_port_parent(ep);
93 
94 	/*
95 	 * Non HDMI sound case, counting port/endpoint on its DT
96 	 * is enough. Let's count it.
97 	 */
98 	i = 0;
99 	id = -1;
100 	for_each_endpoint_of_node(node, endpoint) {
101 		if (endpoint == ep)
102 			id = i;
103 		i++;
104 	}
105 
106 	of_node_put(node);
107 
108 	if (id < 0)
109 		return -ENODEV;
110 
111 	return id;
112 }
113 
asoc_simple_parse_dai(struct device_node * ep,struct snd_soc_dai_link_component * dlc,int * is_single_link)114 static int asoc_simple_parse_dai(struct device_node *ep,
115 				 struct snd_soc_dai_link_component *dlc,
116 				 int *is_single_link)
117 {
118 	struct device_node *node;
119 	struct of_phandle_args args;
120 	int ret;
121 
122 	if (!ep)
123 		return 0;
124 
125 	node = of_graph_get_port_parent(ep);
126 
127 	/* Get dai->name */
128 	args.np		= node;
129 	args.args[0]	= graph_get_dai_id(ep);
130 	args.args_count	= (of_graph_get_endpoint_count(node) > 1);
131 
132 	/*
133 	 * FIXME
134 	 *
135 	 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
136 	 * If user unbinded CPU or Codec driver, but not for Sound Card,
137 	 * dlc->dai_name is keeping unbinded CPU or Codec
138 	 * driver's pointer.
139 	 *
140 	 * If user re-bind CPU or Codec driver again, ALSA SoC will try
141 	 * to rebind Card via snd_soc_try_rebind_card(), but because of
142 	 * above reason, it might can't bind Sound Card.
143 	 * Because Sound Card is pointing to released dai_name pointer.
144 	 *
145 	 * To avoid this rebind Card issue,
146 	 * 1) It needs to alloc memory to keep dai_name eventhough
147 	 *    CPU or Codec driver was unbinded, or
148 	 * 2) user need to rebind Sound Card everytime
149 	 *    if he unbinded CPU or Codec.
150 	 */
151 	ret = snd_soc_get_dai_name(&args, &dlc->dai_name);
152 	if (ret < 0) {
153 		of_node_put(node);
154 		return ret;
155 	}
156 
157 	dlc->of_node = node;
158 
159 	if (is_single_link)
160 		*is_single_link = of_graph_get_endpoint_count(node) == 1;
161 
162 	return 0;
163 }
164 
graph_parse_convert(struct device * dev,struct device_node * ep,struct asoc_simple_data * adata)165 static void graph_parse_convert(struct device *dev,
166 				struct device_node *ep,
167 				struct asoc_simple_data *adata)
168 {
169 	struct device_node *top = dev->of_node;
170 	struct device_node *port = of_get_parent(ep);
171 	struct device_node *ports = of_get_parent(port);
172 	struct device_node *node = of_graph_get_port_parent(ep);
173 
174 	asoc_simple_parse_convert(dev, top,   NULL,   adata);
175 	asoc_simple_parse_convert(dev, node,  PREFIX, adata);
176 	asoc_simple_parse_convert(dev, ports, NULL,   adata);
177 	asoc_simple_parse_convert(dev, port,  NULL,   adata);
178 	asoc_simple_parse_convert(dev, ep,    NULL,   adata);
179 
180 	of_node_put(port);
181 	of_node_put(ports);
182 	of_node_put(node);
183 }
184 
graph_parse_mclk_fs(struct device_node * top,struct device_node * ep,struct simple_dai_props * props)185 static void graph_parse_mclk_fs(struct device_node *top,
186 				struct device_node *ep,
187 				struct simple_dai_props *props)
188 {
189 	struct device_node *port	= of_get_parent(ep);
190 	struct device_node *ports	= of_get_parent(port);
191 	struct device_node *node	= of_graph_get_port_parent(ep);
192 
193 	of_property_read_u32(top,	"mclk-fs", &props->mclk_fs);
194 	of_property_read_u32(ports,	"mclk-fs", &props->mclk_fs);
195 	of_property_read_u32(port,	"mclk-fs", &props->mclk_fs);
196 	of_property_read_u32(ep,	"mclk-fs", &props->mclk_fs);
197 
198 	of_node_put(port);
199 	of_node_put(ports);
200 	of_node_put(node);
201 }
202 
graph_dai_link_of_dpcm(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li,int dup_codec)203 static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
204 				  struct device_node *cpu_ep,
205 				  struct device_node *codec_ep,
206 				  struct link_info *li,
207 				  int dup_codec)
208 {
209 	struct device *dev = simple_priv_to_dev(priv);
210 	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
211 	struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
212 	struct device_node *top = dev->of_node;
213 	struct device_node *ep = li->cpu ? cpu_ep : codec_ep;
214 	struct device_node *port;
215 	struct device_node *ports;
216 	struct device_node *node;
217 	struct asoc_simple_dai *dai;
218 	struct snd_soc_dai_link_component *cpus = dai_link->cpus;
219 	struct snd_soc_dai_link_component *codecs = dai_link->codecs;
220 	int ret;
221 
222 	/* Do it all CPU endpoint, and 1st Codec endpoint */
223 	if (!li->cpu && dup_codec)
224 		return 0;
225 
226 	port	= of_get_parent(ep);
227 	ports	= of_get_parent(port);
228 	node	= of_graph_get_port_parent(ep);
229 
230 	li->link++;
231 
232 	dev_dbg(dev, "link_of DPCM (%pOF)\n", ep);
233 
234 	if (li->cpu) {
235 		int is_single_links = 0;
236 
237 		/* Codec is dummy */
238 		codecs->of_node		= NULL;
239 		codecs->dai_name	= "snd-soc-dummy-dai";
240 		codecs->name		= "snd-soc-dummy";
241 
242 		/* FE settings */
243 		dai_link->dynamic		= 1;
244 		dai_link->dpcm_merged_format	= 1;
245 
246 		dai =
247 		dai_props->cpu_dai	= &priv->dais[li->dais++];
248 
249 		ret = asoc_simple_parse_cpu(ep, dai_link, &is_single_links);
250 		if (ret)
251 			goto out_put_node;
252 
253 		ret = asoc_simple_parse_clk_cpu(dev, ep, dai_link, dai);
254 		if (ret < 0)
255 			goto out_put_node;
256 
257 		ret = asoc_simple_set_dailink_name(dev, dai_link,
258 						   "fe.%s",
259 						   cpus->dai_name);
260 		if (ret < 0)
261 			goto out_put_node;
262 
263 		/* card->num_links includes Codec */
264 		asoc_simple_canonicalize_cpu(dai_link, is_single_links);
265 	} else {
266 		struct snd_soc_codec_conf *cconf;
267 
268 		/* CPU is dummy */
269 		cpus->of_node		= NULL;
270 		cpus->dai_name		= "snd-soc-dummy-dai";
271 		cpus->name		= "snd-soc-dummy";
272 
273 		/* BE settings */
274 		dai_link->no_pcm		= 1;
275 		dai_link->be_hw_params_fixup	= asoc_simple_be_hw_params_fixup;
276 
277 		dai =
278 		dai_props->codec_dai	= &priv->dais[li->dais++];
279 
280 		cconf =
281 		dai_props->codec_conf	= &priv->codec_conf[li->conf++];
282 
283 		ret = asoc_simple_parse_codec(ep, dai_link);
284 		if (ret < 0)
285 			goto out_put_node;
286 
287 		ret = asoc_simple_parse_clk_codec(dev, ep, dai_link, dai);
288 		if (ret < 0)
289 			goto out_put_node;
290 
291 		ret = asoc_simple_set_dailink_name(dev, dai_link,
292 						   "be.%s",
293 						   codecs->dai_name);
294 		if (ret < 0)
295 			goto out_put_node;
296 
297 		/* check "prefix" from top node */
298 		snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
299 					      "prefix");
300 		snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node,
301 					     PREFIX "prefix");
302 		snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node,
303 					     "prefix");
304 		snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node,
305 					     "prefix");
306 	}
307 
308 	graph_parse_convert(dev, ep, &dai_props->adata);
309 	graph_parse_mclk_fs(top, ep, dai_props);
310 
311 	asoc_simple_canonicalize_platform(dai_link);
312 
313 	ret = asoc_simple_parse_tdm(ep, dai);
314 	if (ret)
315 		goto out_put_node;
316 
317 	ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
318 				       NULL, &dai_link->dai_fmt);
319 	if (ret < 0)
320 		goto out_put_node;
321 
322 	snd_soc_dai_link_set_capabilities(dai_link);
323 
324 	dai_link->ops			= &graph_ops;
325 	dai_link->init			= asoc_simple_dai_init;
326 
327 out_put_node:
328 	of_node_put(ports);
329 	of_node_put(port);
330 	of_node_put(node);
331 	return ret;
332 }
333 
graph_dai_link_of(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li)334 static int graph_dai_link_of(struct asoc_simple_priv *priv,
335 			     struct device_node *cpu_ep,
336 			     struct device_node *codec_ep,
337 			     struct link_info *li)
338 {
339 	struct device *dev = simple_priv_to_dev(priv);
340 	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
341 	struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
342 	struct device_node *top = dev->of_node;
343 	struct asoc_simple_dai *cpu_dai;
344 	struct asoc_simple_dai *codec_dai;
345 	int ret, single_cpu = 0;
346 
347 	/* Do it only CPU turn */
348 	if (!li->cpu)
349 		return 0;
350 
351 	dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
352 
353 	li->link++;
354 
355 	cpu_dai			=
356 	dai_props->cpu_dai	= &priv->dais[li->dais++];
357 	codec_dai		=
358 	dai_props->codec_dai	= &priv->dais[li->dais++];
359 
360 	/* Factor to mclk, used in hw_params() */
361 	graph_parse_mclk_fs(top, cpu_ep,   dai_props);
362 	graph_parse_mclk_fs(top, codec_ep, dai_props);
363 
364 	ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
365 				       NULL, &dai_link->dai_fmt);
366 	if (ret < 0)
367 		return ret;
368 
369 	ret = asoc_simple_parse_cpu(cpu_ep, dai_link, &single_cpu);
370 	if (ret < 0)
371 		return ret;
372 
373 	ret = asoc_simple_parse_codec(codec_ep, dai_link);
374 	if (ret < 0)
375 		return ret;
376 
377 	ret = asoc_simple_parse_tdm(cpu_ep, cpu_dai);
378 	if (ret < 0)
379 		return ret;
380 
381 	ret = asoc_simple_parse_tdm(codec_ep, codec_dai);
382 	if (ret < 0)
383 		return ret;
384 
385 	ret = asoc_simple_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
386 	if (ret < 0)
387 		return ret;
388 
389 	ret = asoc_simple_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
390 	if (ret < 0)
391 		return ret;
392 
393 	ret = asoc_simple_set_dailink_name(dev, dai_link,
394 					   "%s-%s",
395 					   dai_link->cpus->dai_name,
396 					   dai_link->codecs->dai_name);
397 	if (ret < 0)
398 		return ret;
399 
400 	dai_link->ops = &graph_ops;
401 	dai_link->init = asoc_simple_dai_init;
402 
403 	asoc_simple_canonicalize_cpu(dai_link, single_cpu);
404 	asoc_simple_canonicalize_platform(dai_link);
405 
406 	return 0;
407 }
408 
graph_for_each_link(struct asoc_simple_priv * priv,struct link_info * li,int (* func_noml)(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li),int (* func_dpcm)(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li,int dup_codec))409 static int graph_for_each_link(struct asoc_simple_priv *priv,
410 			struct link_info *li,
411 			int (*func_noml)(struct asoc_simple_priv *priv,
412 					 struct device_node *cpu_ep,
413 					 struct device_node *codec_ep,
414 					 struct link_info *li),
415 			int (*func_dpcm)(struct asoc_simple_priv *priv,
416 					 struct device_node *cpu_ep,
417 					 struct device_node *codec_ep,
418 					 struct link_info *li, int dup_codec))
419 {
420 	struct of_phandle_iterator it;
421 	struct device *dev = simple_priv_to_dev(priv);
422 	struct device_node *node = dev->of_node;
423 	struct device_node *cpu_port;
424 	struct device_node *cpu_ep;
425 	struct device_node *codec_ep;
426 	struct device_node *codec_port;
427 	struct device_node *codec_port_old = NULL;
428 	struct asoc_simple_data adata;
429 	uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev);
430 	int rc, ret;
431 
432 	/* loop for all listed CPU port */
433 	of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
434 		cpu_port = it.node;
435 		cpu_ep	 = NULL;
436 
437 		/* loop for all CPU endpoint */
438 		while (1) {
439 			cpu_ep = of_get_next_child(cpu_port, cpu_ep);
440 			if (!cpu_ep)
441 				break;
442 
443 			/* get codec */
444 			codec_ep = of_graph_get_remote_endpoint(cpu_ep);
445 			codec_port = of_get_parent(codec_ep);
446 
447 			/* get convert-xxx property */
448 			memset(&adata, 0, sizeof(adata));
449 			graph_parse_convert(dev, codec_ep, &adata);
450 			graph_parse_convert(dev, cpu_ep,   &adata);
451 
452 			/*
453 			 * It is DPCM
454 			 * if Codec port has many endpoints,
455 			 * or has convert-xxx property
456 			 */
457 			if (dpcm_selectable &&
458 			    ((of_get_child_count(codec_port) > 1) ||
459 			     adata.convert_rate || adata.convert_channels))
460 				ret = func_dpcm(priv, cpu_ep, codec_ep, li,
461 						(codec_port_old == codec_port));
462 			/* else normal sound */
463 			else
464 				ret = func_noml(priv, cpu_ep, codec_ep, li);
465 
466 			of_node_put(codec_ep);
467 			of_node_put(codec_port);
468 
469 			if (ret < 0) {
470 				of_node_put(cpu_ep);
471 				return ret;
472 			}
473 
474 			codec_port_old = codec_port;
475 		}
476 	}
477 
478 	return 0;
479 }
480 
graph_parse_of(struct asoc_simple_priv * priv)481 static int graph_parse_of(struct asoc_simple_priv *priv)
482 {
483 	struct snd_soc_card *card = simple_priv_to_card(priv);
484 	struct link_info li;
485 	int ret;
486 
487 	ret = asoc_simple_parse_widgets(card, NULL);
488 	if (ret < 0)
489 		return ret;
490 
491 	ret = asoc_simple_parse_routing(card, NULL);
492 	if (ret < 0)
493 		return ret;
494 
495 	memset(&li, 0, sizeof(li));
496 	for (li.cpu = 1; li.cpu >= 0; li.cpu--) {
497 		/*
498 		 * Detect all CPU first, and Detect all Codec 2nd.
499 		 *
500 		 * In Normal sound case, all DAIs are detected
501 		 * as "CPU-Codec".
502 		 *
503 		 * In DPCM sound case,
504 		 * all CPUs   are detected as "CPU-dummy", and
505 		 * all Codecs are detected as "dummy-Codec".
506 		 * To avoid random sub-device numbering,
507 		 * detect "dummy-Codec" in last;
508 		 */
509 		ret = graph_for_each_link(priv, &li,
510 					  graph_dai_link_of,
511 					  graph_dai_link_of_dpcm);
512 		if (ret < 0)
513 			return ret;
514 	}
515 
516 	return asoc_simple_parse_card_name(card, NULL);
517 }
518 
graph_count_noml(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li)519 static int graph_count_noml(struct asoc_simple_priv *priv,
520 			    struct device_node *cpu_ep,
521 			    struct device_node *codec_ep,
522 			    struct link_info *li)
523 {
524 	struct device *dev = simple_priv_to_dev(priv);
525 
526 	li->link += 1; /* 1xCPU-Codec */
527 	li->dais += 2; /* 1xCPU + 1xCodec */
528 
529 	dev_dbg(dev, "Count As Normal\n");
530 
531 	return 0;
532 }
533 
graph_count_dpcm(struct asoc_simple_priv * priv,struct device_node * cpu_ep,struct device_node * codec_ep,struct link_info * li,int dup_codec)534 static int graph_count_dpcm(struct asoc_simple_priv *priv,
535 			    struct device_node *cpu_ep,
536 			    struct device_node *codec_ep,
537 			    struct link_info *li,
538 			    int dup_codec)
539 {
540 	struct device *dev = simple_priv_to_dev(priv);
541 
542 	li->link++; /* 1xCPU-dummy */
543 	li->dais++; /* 1xCPU */
544 
545 	if (!dup_codec) {
546 		li->link++; /* 1xdummy-Codec */
547 		li->conf++; /* 1xdummy-Codec */
548 		li->dais++; /* 1xCodec */
549 	}
550 
551 	dev_dbg(dev, "Count As DPCM\n");
552 
553 	return 0;
554 }
555 
graph_get_dais_count(struct asoc_simple_priv * priv,struct link_info * li)556 static void graph_get_dais_count(struct asoc_simple_priv *priv,
557 				 struct link_info *li)
558 {
559 	struct device *dev = simple_priv_to_dev(priv);
560 
561 	/*
562 	 * link_num :	number of links.
563 	 *		CPU-Codec / CPU-dummy / dummy-Codec
564 	 * dais_num :	number of DAIs
565 	 * ccnf_num :	number of codec_conf
566 	 *		same number for "dummy-Codec"
567 	 *
568 	 * ex1)
569 	 * CPU0 --- Codec0	link : 5
570 	 * CPU1 --- Codec1	dais : 7
571 	 * CPU2 -/		ccnf : 1
572 	 * CPU3 --- Codec2
573 	 *
574 	 *	=> 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
575 	 *	=> 7 DAIs  = 4xCPU + 3xCodec
576 	 *	=> 1 ccnf  = 1xdummy-Codec
577 	 *
578 	 * ex2)
579 	 * CPU0 --- Codec0	link : 5
580 	 * CPU1 --- Codec1	dais : 6
581 	 * CPU2 -/		ccnf : 1
582 	 * CPU3 -/
583 	 *
584 	 *	=> 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
585 	 *	=> 6 DAIs  = 4xCPU + 2xCodec
586 	 *	=> 1 ccnf  = 1xdummy-Codec
587 	 *
588 	 * ex3)
589 	 * CPU0 --- Codec0	link : 6
590 	 * CPU1 -/		dais : 6
591 	 * CPU2 --- Codec1	ccnf : 2
592 	 * CPU3 -/
593 	 *
594 	 *	=> 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
595 	 *	=> 6 DAIs  = 4xCPU + 2xCodec
596 	 *	=> 2 ccnf  = 2xdummy-Codec
597 	 *
598 	 * ex4)
599 	 * CPU0 --- Codec0 (convert-rate)	link : 3
600 	 * CPU1 --- Codec1			dais : 4
601 	 *					ccnf : 1
602 	 *
603 	 *	=> 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
604 	 *	=> 4 DAIs  = 2xCPU + 2xCodec
605 	 *	=> 1 ccnf  = 1xdummy-Codec
606 	 */
607 	graph_for_each_link(priv, li,
608 			    graph_count_noml,
609 			    graph_count_dpcm);
610 	dev_dbg(dev, "link %d, dais %d, ccnf %d\n",
611 		li->link, li->dais, li->conf);
612 }
613 
graph_card_probe(struct snd_soc_card * card)614 static int graph_card_probe(struct snd_soc_card *card)
615 {
616 	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(card);
617 	int ret;
618 
619 	ret = asoc_simple_init_hp(card, &priv->hp_jack, NULL);
620 	if (ret < 0)
621 		return ret;
622 
623 	ret = asoc_simple_init_mic(card, &priv->mic_jack, NULL);
624 	if (ret < 0)
625 		return ret;
626 
627 	return 0;
628 }
629 
graph_probe(struct platform_device * pdev)630 static int graph_probe(struct platform_device *pdev)
631 {
632 	struct asoc_simple_priv *priv;
633 	struct device *dev = &pdev->dev;
634 	struct snd_soc_card *card;
635 	struct link_info li;
636 	int ret;
637 
638 	/* Allocate the private data and the DAI link array */
639 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
640 	if (!priv)
641 		return -ENOMEM;
642 
643 	card = simple_priv_to_card(priv);
644 	card->owner		= THIS_MODULE;
645 	card->dev		= dev;
646 	card->dapm_widgets	= graph_dapm_widgets;
647 	card->num_dapm_widgets	= ARRAY_SIZE(graph_dapm_widgets);
648 	card->probe		= graph_card_probe;
649 
650 	memset(&li, 0, sizeof(li));
651 	graph_get_dais_count(priv, &li);
652 	if (!li.link || !li.dais)
653 		return -EINVAL;
654 
655 	ret = asoc_simple_init_priv(priv, &li);
656 	if (ret < 0)
657 		return ret;
658 
659 	priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
660 	if (IS_ERR(priv->pa_gpio)) {
661 		ret = PTR_ERR(priv->pa_gpio);
662 		dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
663 		return ret;
664 	}
665 
666 	ret = graph_parse_of(priv);
667 	if (ret < 0) {
668 		if (ret != -EPROBE_DEFER)
669 			dev_err(dev, "parse error %d\n", ret);
670 		goto err;
671 	}
672 
673 	snd_soc_card_set_drvdata(card, priv);
674 
675 	asoc_simple_debug_info(priv);
676 
677 	ret = devm_snd_soc_register_card(dev, card);
678 	if (ret < 0)
679 		goto err;
680 
681 	return 0;
682 err:
683 	asoc_simple_clean_reference(card);
684 
685 	return ret;
686 }
687 
graph_remove(struct platform_device * pdev)688 static int graph_remove(struct platform_device *pdev)
689 {
690 	struct snd_soc_card *card = platform_get_drvdata(pdev);
691 
692 	return asoc_simple_clean_reference(card);
693 }
694 
695 static const struct of_device_id graph_of_match[] = {
696 	{ .compatible = "audio-graph-card", },
697 	{ .compatible = "audio-graph-scu-card",
698 	  .data = (void *)DPCM_SELECTABLE },
699 	{},
700 };
701 MODULE_DEVICE_TABLE(of, graph_of_match);
702 
703 static struct platform_driver graph_card = {
704 	.driver = {
705 		.name = "asoc-audio-graph-card",
706 		.pm = &snd_soc_pm_ops,
707 		.of_match_table = graph_of_match,
708 	},
709 	.probe = graph_probe,
710 	.remove = graph_remove,
711 };
712 module_platform_driver(graph_card);
713 
714 MODULE_ALIAS("platform:asoc-audio-graph-card");
715 MODULE_LICENSE("GPL v2");
716 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
717 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
718