summaryrefslogtreecommitdiffstats
path: root/sound/soc/sh/rcar/rsrc-card.c
blob: 8a357fdf1077c91822d6699dcf79e7aa96574809 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
/*
 * Renesas Sampling Rate Convert Sound Card for DPCM
 *
 * Copyright (C) 2015 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * based on ${LINUX}/sound/soc/generic/simple-card.c
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/jack.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>

struct rsrc_card_of_data {
	const char *prefix;
	const struct snd_soc_dapm_route *routes;
	int num_routes;
};

static const struct snd_soc_dapm_route routes_ssi0_ak4642[] = {
	{"ak4642 Playback", NULL, "DAI0 Playback"},
	{"DAI0 Capture", NULL, "ak4642 Capture"},
};

static const struct rsrc_card_of_data routes_of_ssi0_ak4642 = {
	.prefix		= "ak4642",
	.routes		= routes_ssi0_ak4642,
	.num_routes	= ARRAY_SIZE(routes_ssi0_ak4642),
};

static const struct of_device_id rsrc_card_of_match[] = {
	{ .compatible = "renesas,rsrc-card,lager",	.data = &routes_of_ssi0_ak4642 },
	{ .compatible = "renesas,rsrc-card,koelsch",	.data = &routes_of_ssi0_ak4642 },
	{ .compatible = "renesas,rsrc-card", },
	{},
};
MODULE_DEVICE_TABLE(of, rsrc_card_of_match);

#define DAI_NAME_NUM	32
struct rsrc_card_dai {
	unsigned int sysclk;
	unsigned int tx_slot_mask;
	unsigned int rx_slot_mask;
	int slots;
	int slot_width;
	struct clk *clk;
	char dai_name[DAI_NAME_NUM];
};

#define IDX_CPU		0
#define IDX_CODEC	1
struct rsrc_card_priv {
	struct snd_soc_card snd_card;
	struct snd_soc_codec_conf codec_conf;
	struct rsrc_card_dai *dai_props;
	struct snd_soc_dai_link *dai_link;
	int dai_num;
	u32 convert_rate;
};

#define rsrc_priv_to_dev(priv) ((priv)->snd_card.dev)
#define rsrc_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
#define rsrc_priv_to_props(priv, i) ((priv)->dai_props + (i))
#define rsrc_dev_to_of_data(dev) (of_match_device(rsrc_card_of_match, (dev))->data)

static int rsrc_card_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct rsrc_card_priv *priv =	snd_soc_card_get_drvdata(rtd->card);
	struct rsrc_card_dai *dai_props =
		rsrc_priv_to_props(priv, rtd->num);

	return clk_prepare_enable(dai_props->clk);
}

static void rsrc_card_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct rsrc_card_priv *priv =	snd_soc_card_get_drvdata(rtd->card);
	struct rsrc_card_dai *dai_props =
		rsrc_priv_to_props(priv, rtd->num);

	clk_disable_unprepare(dai_props->clk);
}

static struct snd_soc_ops rsrc_card_ops = {
	.startup = rsrc_card_startup,
	.shutdown = rsrc_card_shutdown,
};

static int rsrc_card_dai_init(struct snd_soc_pcm_runtime *rtd)
{
	struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct snd_soc_dai *dai;
	struct snd_soc_dai_link *dai_link;
	struct rsrc_card_dai *dai_props;
	int num = rtd->num;
	int ret;

	dai_link	= rsrc_priv_to_link(priv, num);
	dai_props	= rsrc_priv_to_props(priv, num);
	dai		= dai_link->dynamic ?
				rtd->cpu_dai :
				rtd->codec_dai;

	if (dai_props->sysclk) {
		ret = snd_soc_dai_set_sysclk(dai, 0, dai_props->sysclk, 0);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "set_sysclk error\n");
			goto err;
		}
	}

	if (dai_props->slots) {
		ret = snd_soc_dai_set_tdm_slot(dai,
					       dai_props->tx_slot_mask,
					       dai_props->rx_slot_mask,
					       dai_props->slots,
					       dai_props->slot_width);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "set_tdm_slot error\n");
			goto err;
		}
	}

	ret = 0;

err:
	return ret;
}

static int rsrc_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
					struct snd_pcm_hw_params *params)
{
	struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct snd_interval *rate = hw_param_interval(params,
						      SNDRV_PCM_HW_PARAM_RATE);

	if (!priv->convert_rate)
		return 0;

	rate->min = rate->max = priv->convert_rate;

	return 0;
}

static int rsrc_card_parse_daifmt(struct device_node *node,
				  struct device_node *codec,
				  struct rsrc_card_priv *priv,
				  struct snd_soc_dai_link *dai_link,
				  unsigned int *retfmt)
{
	struct device_node *bitclkmaster = NULL;
	struct device_node *framemaster = NULL;
	unsigned int daifmt;

	daifmt = snd_soc_of_parse_daifmt(node, NULL,
					 &bitclkmaster, &framemaster);
	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;

	if (!bitclkmaster && !framemaster)
		return -EINVAL;

	if (codec == bitclkmaster)
		daifmt |= (codec == framemaster) ?
			SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
	else
		daifmt |= (codec == framemaster) ?
			SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;

	of_node_put(bitclkmaster);
	of_node_put(framemaster);

	*retfmt = daifmt;

	return 0;
}

static int rsrc_card_parse_links(struct device_node *np,
				 struct rsrc_card_priv *priv,
				 int idx, bool is_fe)
{
	struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
	struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
	struct of_phandle_args args;
	int ret;

	/*
	 * Get node via "sound-dai = <&phandle port>"
	 * it will be used as xxx_of_node on soc_bind_dai_link()
	 */
	ret = of_parse_phandle_with_args(np, "sound-dai",
					 "#sound-dai-cells", 0, &args);
	if (ret)
		return ret;

	/* Parse TDM slot */
	ret = snd_soc_of_parse_tdm_slot(np,
					&dai_props->tx_slot_mask,
					&dai_props->rx_slot_mask,
					&dai_props->slots,
					&dai_props->slot_width);
	if (ret)
		return ret;

	if (is_fe) {
		/* BE is dummy */
		dai_link->codec_of_node		= NULL;
		dai_link->codec_dai_name	= "snd-soc-dummy-dai";
		dai_link->codec_name		= "snd-soc-dummy";

		/* FE settings */
		dai_link->dynamic		= 1;
		dai_link->dpcm_merged_format	= 1;
		dai_link->cpu_of_node		= args.np;
		ret = snd_soc_of_get_dai_name(np, &dai_link->cpu_dai_name);
		if (ret < 0)
			return ret;

		/* set dai_name */
		snprintf(dai_props->dai_name, DAI_NAME_NUM, "fe.%s",
			 dai_link->cpu_dai_name);

		/*
		 * In soc_bind_dai_link() will check cpu name after
		 * of_node matching if dai_link has cpu_dai_name.
		 * but, it will never match if name was created by
		 * fmt_single_name() remove cpu_dai_name if cpu_args
		 * was 0. See:
		 *	fmt_single_name()
		 *	fmt_multiple_name()
		 */
		if (!args.args_count)
			dai_link->cpu_dai_name = NULL;
	} else {
		struct device *dev = rsrc_priv_to_dev(priv);
		const struct rsrc_card_of_data *of_data;

		of_data = rsrc_dev_to_of_data(dev);

		/* FE is dummy */
		dai_link->cpu_of_node		= NULL;
		dai_link->cpu_dai_name		= "snd-soc-dummy-dai";
		dai_link->cpu_name		= "snd-soc-dummy";

		/* BE settings */
		dai_link->no_pcm		= 1;
		dai_link->be_hw_params_fixup	= rsrc_card_be_hw_params_fixup;
		dai_link->codec_of_node		= args.np;
		ret = snd_soc_of_get_dai_name(np, &dai_link->codec_dai_name);
		if (ret < 0)
			return ret;

		/* additional name prefix */
		if (of_data) {
			priv->codec_conf.of_node = dai_link->codec_of_node;
			priv->codec_conf.name_prefix = of_data->prefix;
		} else {
			snd_soc_of_parse_audio_prefix(&priv->snd_card,
						      &priv->codec_conf,
						      dai_link->codec_of_node,
						      "audio-prefix");
		}

		/* set dai_name */
		snprintf(dai_props->dai_name, DAI_NAME_NUM, "be.%s",
			 dai_link->codec_dai_name);
	}

	/* Simple Card assumes platform == cpu */
	dai_link->platform_of_node	= dai_link->cpu_of_node;
	dai_link->dpcm_playback		= 1;
	dai_link->dpcm_capture		= 1;
	dai_link->name			= dai_props->dai_name;
	dai_link->stream_name		= dai_props->dai_name;
	dai_link->ops			= &rsrc_card_ops;
	dai_link->init			= rsrc_card_dai_init;

	return 0;
}

static int rsrc_card_parse_clk(struct device_node *np,
			       struct rsrc_card_priv *priv,
			       int idx, bool is_fe)
{
	struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
	struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
	struct clk *clk;
	struct device_node *of_np = is_fe ?	dai_link->cpu_of_node :
						dai_link->codec_of_node;
	u32 val;

	/*
	 * Parse dai->sysclk come from "clocks = <&xxx>"
	 * (if system has common clock)
	 *  or "system-clock-frequency = <xxx>"
	 *  or device's module clock.
	 */
	if (of_property_read_bool(np, "clocks")) {
		clk = of_clk_get(np, 0);
		if (IS_ERR(clk))
			return PTR_ERR(clk);

		dai_props->sysclk = clk_get_rate(clk);
		dai_props->clk = clk;
	} else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
		dai_props->sysclk = val;
	} else {
		clk = of_clk_get(of_np, 0);
		if (!IS_ERR(clk))
			dai_props->sysclk = clk_get_rate(clk);
	}

	return 0;
}

static int rsrc_card_dai_sub_link_of(struct device_node *node,
				     struct device_node *np,
				     struct rsrc_card_priv *priv,
				     int idx, bool is_fe)
{
	struct device *dev = rsrc_priv_to_dev(priv);
	struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
	struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
	int ret;

	ret = rsrc_card_parse_links(np, priv, idx, is_fe);
	if (ret < 0)
		return ret;

	ret = rsrc_card_parse_clk(np, priv, idx, is_fe);
	if (ret < 0)
		return ret;

	dev_dbg(dev, "\t%s / %04x / %d\n",
		dai_props->dai_name,
		dai_link->dai_fmt,
		dai_props->sysclk);

	return ret;
}

static int rsrc_card_dai_link_of(struct device_node *node,
				 struct rsrc_card_priv *priv)
{
	struct snd_soc_dai_link *dai_link;
	struct device_node *np;
	unsigned int daifmt = 0;
	int ret, i;
	bool is_fe;

	/* find 1st codec */
	i = 0;
	for_each_child_of_node(node, np) {
		dai_link = rsrc_priv_to_link(priv, i);

		if (strcmp(np->name, "codec") == 0) {
			ret = rsrc_card_parse_daifmt(node, np, priv,
						     dai_link, &daifmt);
			if (ret < 0)
				return ret;
			break;
		}
		i++;
	}

	i = 0;
	for_each_child_of_node(node, np) {
		dai_link = rsrc_priv_to_link(priv, i);
		dai_link->dai_fmt = daifmt;

		is_fe = false;
		if (strcmp(np->name, "cpu") == 0)
			is_fe = true;

		ret = rsrc_card_dai_sub_link_of(node, np, priv, i, is_fe);
		if (ret < 0)
			return ret;
		i++;
	}

	return 0;
}

static int rsrc_card_parse_of(struct device_node *node,
			      struct rsrc_card_priv *priv,
			      struct device *dev)
{
	const struct rsrc_card_of_data *of_data = rsrc_dev_to_of_data(dev);
	struct rsrc_card_dai *props;
	struct snd_soc_dai_link *links;
	int ret;
	int num;

	if (!node)
		return -EINVAL;

	num = of_get_child_count(node);
	props = devm_kzalloc(dev, sizeof(*props) * num, GFP_KERNEL);
	links = devm_kzalloc(dev, sizeof(*links) * num, GFP_KERNEL);
	if (!props || !links)
		return -ENOMEM;

	priv->dai_props	= props;
	priv->dai_link	= links;
	priv->dai_num	= num;

	/* Init snd_soc_card */
	priv->snd_card.owner			= THIS_MODULE;
	priv->snd_card.dev			= dev;
	priv->snd_card.dai_link			= priv->dai_link;
	priv->snd_card.num_links		= num;
	priv->snd_card.codec_conf		= &priv->codec_conf;
	priv->snd_card.num_configs		= 1;

	if (of_data) {
		priv->snd_card.of_dapm_routes		= of_data->routes;
		priv->snd_card.num_of_dapm_routes	= of_data->num_routes;
	} else {
		snd_soc_of_parse_audio_routing(&priv->snd_card,
					       "audio-routing");
	}

	/* Parse the card name from DT */
	snd_soc_of_parse_card_name(&priv->snd_card, "card-name");

	/* sampling rate convert */
	of_property_read_u32(node, "convert-rate", &priv->convert_rate);

	dev_dbg(dev, "New rsrc-audio-card: %s (%d)\n",
		priv->snd_card.name ? priv->snd_card.name : "",
		priv->convert_rate);

	ret = rsrc_card_dai_link_of(node, priv);
	if (ret < 0)
		return ret;

	if (!priv->snd_card.name)
		priv->snd_card.name = priv->snd_card.dai_link->name;

	return 0;
}

/* Decrease the reference count of the device nodes */
static int rsrc_card_unref(struct snd_soc_card *card)
{
	struct snd_soc_dai_link *dai_link;
	int num_links;

	for (num_links = 0, dai_link = card->dai_link;
	     num_links < card->num_links;
	     num_links++, dai_link++) {
		of_node_put(dai_link->cpu_of_node);
		of_node_put(dai_link->codec_of_node);
	}
	return 0;
}

static int rsrc_card_probe(struct platform_device *pdev)
{
	struct rsrc_card_priv *priv;
	struct device_node *np = pdev->dev.of_node;
	struct device *dev = &pdev->dev;
	int ret;

	/* Allocate the private data */
	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	ret = rsrc_card_parse_of(np, priv, dev);
	if (ret < 0) {
		if (ret != -EPROBE_DEFER)
			dev_err(dev, "parse error %d\n", ret);
		goto err;
	}

	snd_soc_card_set_drvdata(&priv->snd_card, priv);

	ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
	if (ret >= 0)
		return ret;
err:
	rsrc_card_unref(&priv->snd_card);

	return ret;
}

static int rsrc_card_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);

	return rsrc_card_unref(card);
}

static struct platform_driver rsrc_card = {
	.driver = {
		.name = "renesas-src-audio-card",
		.of_match_table = rsrc_card_of_match,
	},
	.probe = rsrc_card_probe,
	.remove = rsrc_card_remove,
};

module_platform_driver(rsrc_card);

MODULE_ALIAS("platform:renesas-src-audio-card");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Renesas Sampling Rate Convert Sound Card");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
OpenPOWER on IntegriCloud