xref: /openbmc/linux/sound/soc/sh/rcar/core.c (revision 4da722ca)
1 /*
2  * Renesas R-Car SRU/SCU/SSIU/SSI support
3  *
4  * Copyright (C) 2013 Renesas Solutions Corp.
5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6  *
7  * Based on fsi.c
8  * Kuninori Morimoto <morimoto.kuninori@renesas.com>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  */
14 
15 /*
16  * Renesas R-Car sound device structure
17  *
18  * Gen1
19  *
20  * SRU		: Sound Routing Unit
21  *  - SRC	: Sampling Rate Converter
22  *  - CMD
23  *    - CTU	: Channel Count Conversion Unit
24  *    - MIX	: Mixer
25  *    - DVC	: Digital Volume and Mute Function
26  *  - SSI	: Serial Sound Interface
27  *
28  * Gen2
29  *
30  * SCU		: Sampling Rate Converter Unit
31  *  - SRC	: Sampling Rate Converter
32  *  - CMD
33  *   - CTU	: Channel Count Conversion Unit
34  *   - MIX	: Mixer
35  *   - DVC	: Digital Volume and Mute Function
36  * SSIU		: Serial Sound Interface Unit
37  *  - SSI	: Serial Sound Interface
38  */
39 
40 /*
41  *	driver data Image
42  *
43  * rsnd_priv
44  *   |
45  *   | ** this depends on Gen1/Gen2
46  *   |
47  *   +- gen
48  *   |
49  *   | ** these depend on data path
50  *   | ** gen and platform data control it
51  *   |
52  *   +- rdai[0]
53  *   |   |		 sru     ssiu      ssi
54  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
55  *   |   |
56  *   |   |		 sru     ssiu      ssi
57  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
58  *   |
59  *   +- rdai[1]
60  *   |   |		 sru     ssiu      ssi
61  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
62  *   |   |
63  *   |   |		 sru     ssiu      ssi
64  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
65  *   ...
66  *   |
67  *   | ** these control ssi
68  *   |
69  *   +- ssi
70  *   |  |
71  *   |  +- ssi[0]
72  *   |  +- ssi[1]
73  *   |  +- ssi[2]
74  *   |  ...
75  *   |
76  *   | ** these control src
77  *   |
78  *   +- src
79  *      |
80  *      +- src[0]
81  *      +- src[1]
82  *      +- src[2]
83  *      ...
84  *
85  *
86  * for_each_rsnd_dai(xx, priv, xx)
87  *  rdai[0] => rdai[1] => rdai[2] => ...
88  *
89  * for_each_rsnd_mod(xx, rdai, xx)
90  *  [mod] => [mod] => [mod] => ...
91  *
92  * rsnd_dai_call(xxx, fn )
93  *  [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
94  *
95  */
96 #include <linux/pm_runtime.h>
97 #include "rsnd.h"
98 
99 #define RSND_RATES SNDRV_PCM_RATE_8000_192000
100 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
101 
102 static const struct of_device_id rsnd_of_match[] = {
103 	{ .compatible = "renesas,rcar_sound-gen1", .data = (void *)RSND_GEN1 },
104 	{ .compatible = "renesas,rcar_sound-gen2", .data = (void *)RSND_GEN2 },
105 	{ .compatible = "renesas,rcar_sound-gen3", .data = (void *)RSND_GEN2 }, /* gen2 compatible */
106 	{},
107 };
108 MODULE_DEVICE_TABLE(of, rsnd_of_match);
109 
110 /*
111  *	rsnd_mod functions
112  */
113 void rsnd_mod_make_sure(struct rsnd_mod *mod, enum rsnd_mod_type type)
114 {
115 	if (mod->type != type) {
116 		struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
117 		struct device *dev = rsnd_priv_to_dev(priv);
118 
119 		dev_warn(dev, "%s[%d] is not your expected module\n",
120 			 rsnd_mod_name(mod), rsnd_mod_id(mod));
121 	}
122 }
123 
124 char *rsnd_mod_name(struct rsnd_mod *mod)
125 {
126 	if (!mod || !mod->ops)
127 		return "unknown";
128 
129 	return mod->ops->name;
130 }
131 
132 struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
133 				  struct rsnd_mod *mod)
134 {
135 	if (!mod || !mod->ops || !mod->ops->dma_req)
136 		return NULL;
137 
138 	return mod->ops->dma_req(io, mod);
139 }
140 
141 u32 *rsnd_mod_get_status(struct rsnd_dai_stream *io,
142 			 struct rsnd_mod *mod,
143 			 enum rsnd_mod_type type)
144 {
145 	return &mod->status;
146 }
147 
148 int rsnd_mod_init(struct rsnd_priv *priv,
149 		  struct rsnd_mod *mod,
150 		  struct rsnd_mod_ops *ops,
151 		  struct clk *clk,
152 		  u32* (*get_status)(struct rsnd_dai_stream *io,
153 				     struct rsnd_mod *mod,
154 				     enum rsnd_mod_type type),
155 		  enum rsnd_mod_type type,
156 		  int id)
157 {
158 	int ret = clk_prepare(clk);
159 
160 	if (ret)
161 		return ret;
162 
163 	mod->id		= id;
164 	mod->ops	= ops;
165 	mod->type	= type;
166 	mod->clk	= clk;
167 	mod->priv	= priv;
168 	mod->get_status	= get_status;
169 
170 	return ret;
171 }
172 
173 void rsnd_mod_quit(struct rsnd_mod *mod)
174 {
175 	if (mod->clk)
176 		clk_unprepare(mod->clk);
177 	mod->clk = NULL;
178 }
179 
180 void rsnd_mod_interrupt(struct rsnd_mod *mod,
181 			void (*callback)(struct rsnd_mod *mod,
182 					 struct rsnd_dai_stream *io))
183 {
184 	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
185 	struct rsnd_dai_stream *io;
186 	struct rsnd_dai *rdai;
187 	int i;
188 
189 	for_each_rsnd_dai(rdai, priv, i) {
190 		io = &rdai->playback;
191 		if (mod == io->mod[mod->type])
192 			callback(mod, io);
193 
194 		io = &rdai->capture;
195 		if (mod == io->mod[mod->type])
196 			callback(mod, io);
197 	}
198 }
199 
200 int rsnd_io_is_working(struct rsnd_dai_stream *io)
201 {
202 	/* see rsnd_dai_stream_init/quit() */
203 	return !!io->substream;
204 }
205 
206 int rsnd_runtime_channel_original(struct rsnd_dai_stream *io)
207 {
208 	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
209 
210 	return runtime->channels;
211 }
212 
213 int rsnd_runtime_channel_after_ctu(struct rsnd_dai_stream *io)
214 {
215 	int chan = rsnd_runtime_channel_original(io);
216 	struct rsnd_mod *ctu_mod = rsnd_io_to_mod_ctu(io);
217 
218 	if (ctu_mod) {
219 		u32 converted_chan = rsnd_ctu_converted_channel(ctu_mod);
220 
221 		if (converted_chan)
222 			return converted_chan;
223 	}
224 
225 	return chan;
226 }
227 
228 int rsnd_runtime_channel_for_ssi(struct rsnd_dai_stream *io)
229 {
230 	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
231 	int chan = rsnd_io_is_play(io) ?
232 		rsnd_runtime_channel_after_ctu(io) :
233 		rsnd_runtime_channel_original(io);
234 
235 	/* Use Multi SSI */
236 	if (rsnd_runtime_is_ssi_multi(io))
237 		chan /= rsnd_rdai_ssi_lane_get(rdai);
238 
239 	/* TDM Extend Mode needs 8ch */
240 	if (chan == 6)
241 		chan = 8;
242 
243 	return chan;
244 }
245 
246 int rsnd_runtime_is_ssi_multi(struct rsnd_dai_stream *io)
247 {
248 	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
249 	int lane = rsnd_rdai_ssi_lane_get(rdai);
250 	int chan = rsnd_io_is_play(io) ?
251 		rsnd_runtime_channel_after_ctu(io) :
252 		rsnd_runtime_channel_original(io);
253 
254 	return (chan > 2) && (lane > 1);
255 }
256 
257 int rsnd_runtime_is_ssi_tdm(struct rsnd_dai_stream *io)
258 {
259 	return rsnd_runtime_channel_for_ssi(io) >= 6;
260 }
261 
262 /*
263  *	ADINR function
264  */
265 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
266 {
267 	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
268 	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
269 	struct device *dev = rsnd_priv_to_dev(priv);
270 
271 	switch (runtime->sample_bits) {
272 	case 16:
273 		return 8 << 16;
274 	case 32:
275 		return 0 << 16;
276 	}
277 
278 	dev_warn(dev, "not supported sample bits\n");
279 
280 	return 0;
281 }
282 
283 /*
284  *	DALIGN function
285  */
286 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
287 {
288 	struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
289 	struct rsnd_mod *target;
290 	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
291 	u32 val = 0x76543210;
292 	u32 mask = ~0;
293 
294 	/*
295 	 * *Hardware* L/R and *Software* L/R are inverted.
296 	 * We need to care about inversion timing to control
297 	 * Playback/Capture correctly.
298 	 * The point is [DVC] needs *Hardware* L/R, [MEM] needs *Software* L/R
299 	 *
300 	 * sL/R : software L/R
301 	 * hL/R : hardware L/R
302 	 * (*)  : conversion timing
303 	 *
304 	 * Playback
305 	 *	     sL/R (*) hL/R     hL/R     hL/R      hL/R     hL/R
306 	 *	[MEM] -> [SRC] -> [DVC] -> [CMD] -> [SSIU] -> [SSI] -> codec
307 	 *
308 	 * Capture
309 	 *	     hL/R     hL/R      hL/R     hL/R     hL/R (*) sL/R
310 	 *	codec -> [SSI] -> [SSIU] -> [SRC] -> [DVC] -> [CMD] -> [MEM]
311 	 */
312 	if (rsnd_io_is_play(io)) {
313 		struct rsnd_mod *src = rsnd_io_to_mod_src(io);
314 
315 		target = src ? src : ssiu;
316 	} else {
317 		struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
318 
319 		target = cmd ? cmd : ssiu;
320 	}
321 
322 	mask <<= runtime->channels * 4;
323 	val = val & mask;
324 
325 	switch (runtime->sample_bits) {
326 	case 16:
327 		val |= 0x67452301 & ~mask;
328 		break;
329 	case 32:
330 		val |= 0x76543210 & ~mask;
331 		break;
332 	}
333 
334 	/*
335 	 * exchange channeles on SRC if possible,
336 	 * otherwise, R/L volume settings on DVC
337 	 * changes inverted channels
338 	 */
339 	if (mod == target)
340 		return val;
341 	else
342 		return 0x76543210;
343 }
344 
345 u32 rsnd_get_busif_shift(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
346 {
347 	enum rsnd_mod_type playback_mods[] = {
348 		RSND_MOD_SRC,
349 		RSND_MOD_CMD,
350 		RSND_MOD_SSIU,
351 	};
352 	enum rsnd_mod_type capture_mods[] = {
353 		RSND_MOD_CMD,
354 		RSND_MOD_SRC,
355 		RSND_MOD_SSIU,
356 	};
357 	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
358 	struct rsnd_mod *tmod = NULL;
359 	enum rsnd_mod_type *mods =
360 		rsnd_io_is_play(io) ?
361 		playback_mods : capture_mods;
362 	int i;
363 
364 	/*
365 	 * This is needed for 24bit data
366 	 * We need to shift 8bit
367 	 *
368 	 * Linux 24bit data is located as 0x00******
369 	 * HW    24bit data is located as 0x******00
370 	 *
371 	 */
372 	switch (runtime->sample_bits) {
373 	case 16:
374 		return 0;
375 	case 32:
376 		break;
377 	}
378 
379 	for (i = 0; i < ARRAY_SIZE(playback_mods); i++) {
380 		tmod = rsnd_io_to_mod(io, mods[i]);
381 		if (tmod)
382 			break;
383 	}
384 
385 	if (tmod != mod)
386 		return 0;
387 
388 	if (rsnd_io_is_play(io))
389 		return  (0 << 20) | /* shift to Left */
390 			(8 << 16);  /* 8bit */
391 	else
392 		return  (1 << 20) | /* shift to Right */
393 			(8 << 16);  /* 8bit */
394 }
395 
396 /*
397  *	rsnd_dai functions
398  */
399 struct rsnd_mod *rsnd_mod_next(int *iterator,
400 			       struct rsnd_dai_stream *io,
401 			       enum rsnd_mod_type *array,
402 			       int array_size)
403 {
404 	struct rsnd_mod *mod;
405 	enum rsnd_mod_type type;
406 	int max = array ? array_size : RSND_MOD_MAX;
407 
408 	for (; *iterator < max; (*iterator)++) {
409 		type = (array) ? array[*iterator] : *iterator;
410 		mod = io->mod[type];
411 		if (!mod)
412 			continue;
413 
414 		return mod;
415 	}
416 
417 	return NULL;
418 }
419 
420 static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
421 	{
422 		/* CAPTURE */
423 		RSND_MOD_AUDMAPP,
424 		RSND_MOD_AUDMA,
425 		RSND_MOD_DVC,
426 		RSND_MOD_MIX,
427 		RSND_MOD_CTU,
428 		RSND_MOD_CMD,
429 		RSND_MOD_SRC,
430 		RSND_MOD_SSIU,
431 		RSND_MOD_SSIM3,
432 		RSND_MOD_SSIM2,
433 		RSND_MOD_SSIM1,
434 		RSND_MOD_SSIP,
435 		RSND_MOD_SSI,
436 	}, {
437 		/* PLAYBACK */
438 		RSND_MOD_AUDMAPP,
439 		RSND_MOD_AUDMA,
440 		RSND_MOD_SSIM3,
441 		RSND_MOD_SSIM2,
442 		RSND_MOD_SSIM1,
443 		RSND_MOD_SSIP,
444 		RSND_MOD_SSI,
445 		RSND_MOD_SSIU,
446 		RSND_MOD_DVC,
447 		RSND_MOD_MIX,
448 		RSND_MOD_CTU,
449 		RSND_MOD_CMD,
450 		RSND_MOD_SRC,
451 	},
452 };
453 
454 static int rsnd_status_update(u32 *status,
455 			      int shift, int add, int timing)
456 {
457 	u32 mask	= 0xF << shift;
458 	u8 val		= (*status >> shift) & 0xF;
459 	u8 next_val	= (val + add) & 0xF;
460 	int func_call	= (val == timing);
461 
462 	if (next_val == 0xF) /* underflow case */
463 		func_call = 0;
464 	else
465 		*status = (*status & ~mask) + (next_val << shift);
466 
467 	return func_call;
468 }
469 
470 #define rsnd_dai_call(fn, io, param...)					\
471 ({									\
472 	struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));	\
473 	struct rsnd_mod *mod;						\
474 	int is_play = rsnd_io_is_play(io);				\
475 	int ret = 0, i;							\
476 	enum rsnd_mod_type *types = rsnd_mod_sequence[is_play];		\
477 	for_each_rsnd_mod_arrays(i, mod, io, types, RSND_MOD_MAX) {	\
478 		int tmp = 0;						\
479 		u32 *status = mod->get_status(io, mod, types[i]);	\
480 		int func_call = rsnd_status_update(status,		\
481 						__rsnd_mod_shift_##fn,	\
482 						__rsnd_mod_add_##fn,	\
483 						__rsnd_mod_call_##fn);	\
484 		dev_dbg(dev, "%s[%d]\t0x%08x %s\n",			\
485 			rsnd_mod_name(mod), rsnd_mod_id(mod), *status,	\
486 			(func_call && (mod)->ops->fn) ? #fn : "");	\
487 		if (func_call && (mod)->ops->fn)			\
488 			tmp = (mod)->ops->fn(mod, io, param);		\
489 		if (tmp)						\
490 			dev_err(dev, "%s[%d] : %s error %d\n",		\
491 				rsnd_mod_name(mod), rsnd_mod_id(mod),	\
492 						     #fn, tmp);		\
493 		ret |= tmp;						\
494 	}								\
495 	ret;								\
496 })
497 
498 int rsnd_dai_connect(struct rsnd_mod *mod,
499 		     struct rsnd_dai_stream *io,
500 		     enum rsnd_mod_type type)
501 {
502 	struct rsnd_priv *priv;
503 	struct device *dev;
504 
505 	if (!mod)
506 		return -EIO;
507 
508 	if (io->mod[type] == mod)
509 		return 0;
510 
511 	if (io->mod[type])
512 		return -EINVAL;
513 
514 	priv = rsnd_mod_to_priv(mod);
515 	dev = rsnd_priv_to_dev(priv);
516 
517 	io->mod[type] = mod;
518 
519 	dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
520 		rsnd_mod_name(mod), rsnd_mod_id(mod),
521 		rsnd_io_is_play(io) ? "Playback" : "Capture");
522 
523 	return 0;
524 }
525 
526 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
527 				struct rsnd_dai_stream *io,
528 				enum rsnd_mod_type type)
529 {
530 	io->mod[type] = NULL;
531 }
532 
533 int rsnd_rdai_channels_ctrl(struct rsnd_dai *rdai,
534 			    int max_channels)
535 {
536 	if (max_channels > 0)
537 		rdai->max_channels = max_channels;
538 
539 	return rdai->max_channels;
540 }
541 
542 int rsnd_rdai_ssi_lane_ctrl(struct rsnd_dai *rdai,
543 			    int ssi_lane)
544 {
545 	if (ssi_lane > 0)
546 		rdai->ssi_lane = ssi_lane;
547 
548 	return rdai->ssi_lane;
549 }
550 
551 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
552 {
553 	if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
554 		return NULL;
555 
556 	return priv->rdai + id;
557 }
558 
559 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
560 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
561 {
562 	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
563 
564 	return rsnd_rdai_get(priv, dai->id);
565 }
566 
567 /*
568  *	rsnd_soc_dai functions
569  */
570 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
571 {
572 	struct snd_pcm_substream *substream = io->substream;
573 
574 	/*
575 	 * this function should be called...
576 	 *
577 	 * - if rsnd_dai_pointer_update() returns true
578 	 * - without spin lock
579 	 */
580 
581 	snd_pcm_period_elapsed(substream);
582 }
583 
584 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
585 				struct snd_pcm_substream *substream)
586 {
587 	io->substream		= substream;
588 }
589 
590 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
591 {
592 	io->substream		= NULL;
593 }
594 
595 static
596 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
597 {
598 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
599 
600 	return  rtd->cpu_dai;
601 }
602 
603 static
604 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
605 					struct snd_pcm_substream *substream)
606 {
607 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
608 		return &rdai->playback;
609 	else
610 		return &rdai->capture;
611 }
612 
613 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
614 			    struct snd_soc_dai *dai)
615 {
616 	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
617 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
618 	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
619 	int ret;
620 	unsigned long flags;
621 
622 	spin_lock_irqsave(&priv->lock, flags);
623 
624 	switch (cmd) {
625 	case SNDRV_PCM_TRIGGER_START:
626 	case SNDRV_PCM_TRIGGER_RESUME:
627 		rsnd_dai_stream_init(io, substream);
628 
629 		ret = rsnd_dai_call(init, io, priv);
630 		if (ret < 0)
631 			goto dai_trigger_end;
632 
633 		ret = rsnd_dai_call(start, io, priv);
634 		if (ret < 0)
635 			goto dai_trigger_end;
636 
637 		ret = rsnd_dai_call(irq, io, priv, 1);
638 		if (ret < 0)
639 			goto dai_trigger_end;
640 
641 		break;
642 	case SNDRV_PCM_TRIGGER_STOP:
643 	case SNDRV_PCM_TRIGGER_SUSPEND:
644 		ret = rsnd_dai_call(irq, io, priv, 0);
645 
646 		ret |= rsnd_dai_call(stop, io, priv);
647 
648 		ret |= rsnd_dai_call(quit, io, priv);
649 
650 		rsnd_dai_stream_quit(io);
651 		break;
652 	default:
653 		ret = -EINVAL;
654 	}
655 
656 dai_trigger_end:
657 	spin_unlock_irqrestore(&priv->lock, flags);
658 
659 	return ret;
660 }
661 
662 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
663 {
664 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
665 
666 	/* set master/slave audio interface */
667 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
668 	case SND_SOC_DAIFMT_CBM_CFM:
669 		rdai->clk_master = 0;
670 		break;
671 	case SND_SOC_DAIFMT_CBS_CFS:
672 		rdai->clk_master = 1; /* codec is slave, cpu is master */
673 		break;
674 	default:
675 		return -EINVAL;
676 	}
677 
678 	/* set format */
679 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
680 	case SND_SOC_DAIFMT_I2S:
681 		rdai->sys_delay = 0;
682 		rdai->data_alignment = 0;
683 		rdai->frm_clk_inv = 0;
684 		break;
685 	case SND_SOC_DAIFMT_LEFT_J:
686 		rdai->sys_delay = 1;
687 		rdai->data_alignment = 0;
688 		rdai->frm_clk_inv = 1;
689 		break;
690 	case SND_SOC_DAIFMT_RIGHT_J:
691 		rdai->sys_delay = 1;
692 		rdai->data_alignment = 1;
693 		rdai->frm_clk_inv = 1;
694 		break;
695 	}
696 
697 	/* set clock inversion */
698 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
699 	case SND_SOC_DAIFMT_NB_IF:
700 		rdai->frm_clk_inv = !rdai->frm_clk_inv;
701 		break;
702 	case SND_SOC_DAIFMT_IB_NF:
703 		rdai->bit_clk_inv = !rdai->bit_clk_inv;
704 		break;
705 	case SND_SOC_DAIFMT_IB_IF:
706 		rdai->bit_clk_inv = !rdai->bit_clk_inv;
707 		rdai->frm_clk_inv = !rdai->frm_clk_inv;
708 		break;
709 	case SND_SOC_DAIFMT_NB_NF:
710 	default:
711 		break;
712 	}
713 
714 	return 0;
715 }
716 
717 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
718 				     u32 tx_mask, u32 rx_mask,
719 				     int slots, int slot_width)
720 {
721 	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
722 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
723 	struct device *dev = rsnd_priv_to_dev(priv);
724 
725 	switch (slots) {
726 	case 2:
727 	case 6:
728 	case 8:
729 	case 16:
730 		/* TDM Extend Mode */
731 		rsnd_rdai_channels_set(rdai, slots);
732 		rsnd_rdai_ssi_lane_set(rdai, 1);
733 		break;
734 	default:
735 		dev_err(dev, "unsupported TDM slots (%d)\n", slots);
736 		return -EINVAL;
737 	}
738 
739 	return 0;
740 }
741 
742 static unsigned int rsnd_soc_hw_channels_list[] = {
743 	2, 6, 8, 16,
744 };
745 
746 static unsigned int rsnd_soc_hw_rate_list[] = {
747 	  8000,
748 	 11025,
749 	 16000,
750 	 22050,
751 	 32000,
752 	 44100,
753 	 48000,
754 	 64000,
755 	 88200,
756 	 96000,
757 	176400,
758 	192000,
759 };
760 
761 static int rsnd_soc_hw_rule(struct rsnd_priv *priv,
762 			    unsigned int *list, int list_num,
763 			    struct snd_interval *baseline, struct snd_interval *iv)
764 {
765 	struct snd_interval p;
766 	unsigned int rate;
767 	int i;
768 
769 	snd_interval_any(&p);
770 	p.min = UINT_MAX;
771 	p.max = 0;
772 
773 	for (i = 0; i < list_num; i++) {
774 
775 		if (!snd_interval_test(iv, list[i]))
776 			continue;
777 
778 		rate = rsnd_ssi_clk_query(priv,
779 					  baseline->min, list[i], NULL);
780 		if (rate > 0) {
781 			p.min = min(p.min, list[i]);
782 			p.max = max(p.max, list[i]);
783 		}
784 
785 		rate = rsnd_ssi_clk_query(priv,
786 					  baseline->max, list[i], NULL);
787 		if (rate > 0) {
788 			p.min = min(p.min, list[i]);
789 			p.max = max(p.max, list[i]);
790 		}
791 	}
792 
793 	return snd_interval_refine(iv, &p);
794 }
795 
796 static int rsnd_soc_hw_rule_rate(struct snd_pcm_hw_params *params,
797 				 struct snd_pcm_hw_rule *rule)
798 {
799 	struct snd_interval *ic_ = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
800 	struct snd_interval *ir = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
801 	struct snd_interval ic;
802 	struct snd_soc_dai *dai = rule->private;
803 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
804 	struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
805 
806 	/*
807 	 * possible sampling rate limitation is same as
808 	 * 2ch if it supports multi ssi
809 	 */
810 	ic = *ic_;
811 	if (1 < rsnd_rdai_ssi_lane_get(rdai)) {
812 		ic.min = 2;
813 		ic.max = 2;
814 	}
815 
816 	return rsnd_soc_hw_rule(priv, rsnd_soc_hw_rate_list,
817 				ARRAY_SIZE(rsnd_soc_hw_rate_list),
818 				&ic, ir);
819 }
820 
821 
822 static int rsnd_soc_hw_rule_channels(struct snd_pcm_hw_params *params,
823 				     struct snd_pcm_hw_rule *rule)
824 {
825 	struct snd_interval *ic_ = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
826 	struct snd_interval *ir = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
827 	struct snd_interval ic;
828 	struct snd_soc_dai *dai = rule->private;
829 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
830 	struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
831 
832 	/*
833 	 * possible sampling rate limitation is same as
834 	 * 2ch if it supports multi ssi
835 	 */
836 	ic = *ic_;
837 	if (1 < rsnd_rdai_ssi_lane_get(rdai)) {
838 		ic.min = 2;
839 		ic.max = 2;
840 	}
841 
842 	return rsnd_soc_hw_rule(priv, rsnd_soc_hw_channels_list,
843 				ARRAY_SIZE(rsnd_soc_hw_channels_list),
844 				ir, &ic);
845 }
846 
847 static void rsnd_soc_hw_constraint(struct snd_pcm_runtime *runtime,
848 				   struct snd_soc_dai *dai)
849 {
850 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
851 	struct snd_pcm_hw_constraint_list *constraint = &rdai->constraint;
852 	unsigned int max_channels = rsnd_rdai_channels_get(rdai);
853 	int i;
854 
855 	/*
856 	 * Channel Limitation
857 	 * It depends on Platform design
858 	 */
859 	constraint->list	= rsnd_soc_hw_channels_list;
860 	constraint->count	= 0;
861 	constraint->mask	= 0;
862 
863 	for (i = 0; i < ARRAY_SIZE(rsnd_soc_hw_channels_list); i++) {
864 		if (rsnd_soc_hw_channels_list[i] > max_channels)
865 			break;
866 		constraint->count = i + 1;
867 	}
868 
869 	snd_pcm_hw_constraint_list(runtime, 0,
870 				   SNDRV_PCM_HW_PARAM_CHANNELS, constraint);
871 
872 	/*
873 	 * Sampling Rate / Channel Limitation
874 	 * It depends on Clock Master Mode
875 	 */
876 	if (!rsnd_rdai_is_clk_master(rdai))
877 		return;
878 
879 	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
880 			    rsnd_soc_hw_rule_rate, dai,
881 			    SNDRV_PCM_HW_PARAM_CHANNELS, -1);
882 	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
883 			    rsnd_soc_hw_rule_channels, dai,
884 			    SNDRV_PCM_HW_PARAM_RATE, -1);
885 }
886 
887 static int rsnd_soc_dai_startup(struct snd_pcm_substream *substream,
888 				struct snd_soc_dai *dai)
889 {
890 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
891 	struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
892 	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
893 	int ret;
894 
895 	/* rsnd_io_to_runtime() is not yet enabled here */
896 	rsnd_soc_hw_constraint(substream->runtime, dai);
897 
898 	/*
899 	 * call rsnd_dai_call without spinlock
900 	 */
901 	ret = rsnd_dai_call(nolock_start, io, priv);
902 	if (ret < 0)
903 		rsnd_dai_call(nolock_stop, io, priv);
904 
905 	return ret;
906 }
907 
908 static void rsnd_soc_dai_shutdown(struct snd_pcm_substream *substream,
909 				  struct snd_soc_dai *dai)
910 {
911 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
912 	struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
913 	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
914 
915 	/*
916 	 * call rsnd_dai_call without spinlock
917 	 */
918 	rsnd_dai_call(nolock_stop, io, priv);
919 }
920 
921 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
922 	.startup	= rsnd_soc_dai_startup,
923 	.shutdown	= rsnd_soc_dai_shutdown,
924 	.trigger	= rsnd_soc_dai_trigger,
925 	.set_fmt	= rsnd_soc_dai_set_fmt,
926 	.set_tdm_slot	= rsnd_soc_set_dai_tdm_slot,
927 };
928 
929 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
930 		struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
931 		struct device_node *node,
932 		struct device_node *playback,
933 		struct device_node *capture)
934 {
935 	struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
936 	struct device_node *np;
937 	struct rsnd_mod *mod;
938 	int i;
939 
940 	if (!node)
941 		return;
942 
943 	i = 0;
944 	for_each_child_of_node(node, np) {
945 		mod = mod_get(priv, i);
946 		if (np == playback)
947 			rsnd_dai_connect(mod, &rdai->playback, mod->type);
948 		if (np == capture)
949 			rsnd_dai_connect(mod, &rdai->capture, mod->type);
950 		i++;
951 	}
952 
953 	of_node_put(node);
954 }
955 
956 static struct device_node *rsnd_dai_of_node(struct rsnd_priv *priv,
957 					    int *is_graph)
958 {
959 	struct device *dev = rsnd_priv_to_dev(priv);
960 	struct device_node *np = dev->of_node;
961 	struct device_node *dai_node;
962 	struct device_node *ret;
963 
964 	*is_graph = 0;
965 
966 	/*
967 	 * parse both previous dai (= rcar_sound,dai), and
968 	 * graph dai (= ports/port)
969 	 */
970 	dai_node = of_get_child_by_name(np, RSND_NODE_DAI);
971 	if (dai_node) {
972 		ret = dai_node;
973 		goto of_node_compatible;
974 	}
975 
976 	ret = np;
977 
978 	dai_node = of_graph_get_next_endpoint(np, NULL);
979 	if (dai_node)
980 		goto of_node_graph;
981 
982 	return NULL;
983 
984 of_node_graph:
985 	*is_graph = 1;
986 of_node_compatible:
987 	of_node_put(dai_node);
988 
989 	return ret;
990 }
991 
992 static void __rsnd_dai_probe(struct rsnd_priv *priv,
993 			     struct device_node *dai_np,
994 			     int dai_i, int is_graph)
995 {
996 	struct device_node *playback, *capture;
997 	struct rsnd_dai_stream *io_playback;
998 	struct rsnd_dai_stream *io_capture;
999 	struct snd_soc_dai_driver *drv;
1000 	struct rsnd_dai *rdai;
1001 	struct device *dev = rsnd_priv_to_dev(priv);
1002 	int io_i;
1003 
1004 	rdai		= rsnd_rdai_get(priv, dai_i);
1005 	drv		= priv->daidrv + dai_i;
1006 	io_playback	= &rdai->playback;
1007 	io_capture	= &rdai->capture;
1008 
1009 	snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
1010 
1011 	rdai->priv	= priv;
1012 	drv->name	= rdai->name;
1013 	drv->ops	= &rsnd_soc_dai_ops;
1014 
1015 	snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
1016 		 "DAI%d Playback", dai_i);
1017 	drv->playback.rates		= RSND_RATES;
1018 	drv->playback.formats		= RSND_FMTS;
1019 	drv->playback.channels_min	= 2;
1020 	drv->playback.channels_max	= 16;
1021 	drv->playback.stream_name	= rdai->playback.name;
1022 
1023 	snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
1024 		 "DAI%d Capture", dai_i);
1025 	drv->capture.rates		= RSND_RATES;
1026 	drv->capture.formats		= RSND_FMTS;
1027 	drv->capture.channels_min	= 2;
1028 	drv->capture.channels_max	= 16;
1029 	drv->capture.stream_name	= rdai->capture.name;
1030 
1031 	rdai->playback.rdai		= rdai;
1032 	rdai->capture.rdai		= rdai;
1033 	rsnd_rdai_channels_set(rdai, 2); /* default 2ch */
1034 	rsnd_rdai_ssi_lane_set(rdai, 1); /* default 1lane */
1035 
1036 	for (io_i = 0;; io_i++) {
1037 		playback = of_parse_phandle(dai_np, "playback", io_i);
1038 		capture  = of_parse_phandle(dai_np, "capture", io_i);
1039 
1040 		if (!playback && !capture)
1041 			break;
1042 
1043 		rsnd_parse_connect_ssi(rdai, playback, capture);
1044 		rsnd_parse_connect_src(rdai, playback, capture);
1045 		rsnd_parse_connect_ctu(rdai, playback, capture);
1046 		rsnd_parse_connect_mix(rdai, playback, capture);
1047 		rsnd_parse_connect_dvc(rdai, playback, capture);
1048 
1049 		of_node_put(playback);
1050 		of_node_put(capture);
1051 	}
1052 
1053 	dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
1054 		rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
1055 		rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
1056 }
1057 
1058 static int rsnd_dai_probe(struct rsnd_priv *priv)
1059 {
1060 	struct device_node *dai_node;
1061 	struct device_node *dai_np;
1062 	struct snd_soc_dai_driver *rdrv;
1063 	struct device *dev = rsnd_priv_to_dev(priv);
1064 	struct rsnd_dai *rdai;
1065 	int nr;
1066 	int is_graph;
1067 	int dai_i;
1068 
1069 	dai_node = rsnd_dai_of_node(priv, &is_graph);
1070 	if (is_graph)
1071 		nr = of_graph_get_endpoint_count(dai_node);
1072 	else
1073 		nr = of_get_child_count(dai_node);
1074 
1075 	if (!nr)
1076 		return -EINVAL;
1077 
1078 	rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
1079 	rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
1080 	if (!rdrv || !rdai)
1081 		return -ENOMEM;
1082 
1083 	priv->rdai_nr	= nr;
1084 	priv->daidrv	= rdrv;
1085 	priv->rdai	= rdai;
1086 
1087 	/*
1088 	 * parse all dai
1089 	 */
1090 	dai_i = 0;
1091 	if (is_graph) {
1092 		for_each_endpoint_of_node(dai_node, dai_np) {
1093 			__rsnd_dai_probe(priv, dai_np, dai_i, is_graph);
1094 			rsnd_ssi_parse_hdmi_connection(priv, dai_np, dai_i);
1095 			dai_i++;
1096 		}
1097 	} else {
1098 		for_each_child_of_node(dai_node, dai_np)
1099 			__rsnd_dai_probe(priv, dai_np, dai_i++, is_graph);
1100 	}
1101 
1102 	return 0;
1103 }
1104 
1105 /*
1106  *		pcm ops
1107  */
1108 static struct snd_pcm_hardware rsnd_pcm_hardware = {
1109 	.info =		SNDRV_PCM_INFO_INTERLEAVED	|
1110 			SNDRV_PCM_INFO_MMAP		|
1111 			SNDRV_PCM_INFO_MMAP_VALID,
1112 	.buffer_bytes_max	= 64 * 1024,
1113 	.period_bytes_min	= 32,
1114 	.period_bytes_max	= 8192,
1115 	.periods_min		= 1,
1116 	.periods_max		= 32,
1117 	.fifo_size		= 256,
1118 };
1119 
1120 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
1121 {
1122 	struct snd_pcm_runtime *runtime = substream->runtime;
1123 	int ret = 0;
1124 
1125 	snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
1126 
1127 	ret = snd_pcm_hw_constraint_integer(runtime,
1128 					    SNDRV_PCM_HW_PARAM_PERIODS);
1129 
1130 	return ret;
1131 }
1132 
1133 static int rsnd_hw_params(struct snd_pcm_substream *substream,
1134 			 struct snd_pcm_hw_params *hw_params)
1135 {
1136 	struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
1137 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1138 	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1139 	int ret;
1140 
1141 	ret = rsnd_dai_call(hw_params, io, substream, hw_params);
1142 	if (ret)
1143 		return ret;
1144 
1145 	return snd_pcm_lib_malloc_pages(substream,
1146 					params_buffer_bytes(hw_params));
1147 }
1148 
1149 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
1150 {
1151 	struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
1152 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1153 	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1154 	snd_pcm_uframes_t pointer = 0;
1155 
1156 	rsnd_dai_call(pointer, io, &pointer);
1157 
1158 	return pointer;
1159 }
1160 
1161 static struct snd_pcm_ops rsnd_pcm_ops = {
1162 	.open		= rsnd_pcm_open,
1163 	.ioctl		= snd_pcm_lib_ioctl,
1164 	.hw_params	= rsnd_hw_params,
1165 	.hw_free	= snd_pcm_lib_free_pages,
1166 	.pointer	= rsnd_pointer,
1167 };
1168 
1169 /*
1170  *		snd_kcontrol
1171  */
1172 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
1173 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
1174 			   struct snd_ctl_elem_info *uinfo)
1175 {
1176 	struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1177 
1178 	if (cfg->texts) {
1179 		uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1180 		uinfo->count = cfg->size;
1181 		uinfo->value.enumerated.items = cfg->max;
1182 		if (uinfo->value.enumerated.item >= cfg->max)
1183 			uinfo->value.enumerated.item = cfg->max - 1;
1184 		strlcpy(uinfo->value.enumerated.name,
1185 			cfg->texts[uinfo->value.enumerated.item],
1186 			sizeof(uinfo->value.enumerated.name));
1187 	} else {
1188 		uinfo->count = cfg->size;
1189 		uinfo->value.integer.min = 0;
1190 		uinfo->value.integer.max = cfg->max;
1191 		uinfo->type = (cfg->max == 1) ?
1192 			SNDRV_CTL_ELEM_TYPE_BOOLEAN :
1193 			SNDRV_CTL_ELEM_TYPE_INTEGER;
1194 	}
1195 
1196 	return 0;
1197 }
1198 
1199 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
1200 			  struct snd_ctl_elem_value *uc)
1201 {
1202 	struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1203 	int i;
1204 
1205 	for (i = 0; i < cfg->size; i++)
1206 		if (cfg->texts)
1207 			uc->value.enumerated.item[i] = cfg->val[i];
1208 		else
1209 			uc->value.integer.value[i] = cfg->val[i];
1210 
1211 	return 0;
1212 }
1213 
1214 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
1215 			  struct snd_ctl_elem_value *uc)
1216 {
1217 	struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
1218 	struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1219 	int i, change = 0;
1220 
1221 	if (!cfg->accept(cfg->io))
1222 		return 0;
1223 
1224 	for (i = 0; i < cfg->size; i++) {
1225 		if (cfg->texts) {
1226 			change |= (uc->value.enumerated.item[i] != cfg->val[i]);
1227 			cfg->val[i] = uc->value.enumerated.item[i];
1228 		} else {
1229 			change |= (uc->value.integer.value[i] != cfg->val[i]);
1230 			cfg->val[i] = uc->value.integer.value[i];
1231 		}
1232 	}
1233 
1234 	if (change && cfg->update)
1235 		cfg->update(cfg->io, mod);
1236 
1237 	return change;
1238 }
1239 
1240 int rsnd_kctrl_accept_anytime(struct rsnd_dai_stream *io)
1241 {
1242 	return 1;
1243 }
1244 
1245 int rsnd_kctrl_accept_runtime(struct rsnd_dai_stream *io)
1246 {
1247 	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
1248 
1249 	return !!runtime;
1250 }
1251 
1252 struct rsnd_kctrl_cfg *rsnd_kctrl_init_m(struct rsnd_kctrl_cfg_m *cfg)
1253 {
1254 	cfg->cfg.val = cfg->val;
1255 
1256 	return &cfg->cfg;
1257 }
1258 
1259 struct rsnd_kctrl_cfg *rsnd_kctrl_init_s(struct rsnd_kctrl_cfg_s *cfg)
1260 {
1261 	cfg->cfg.val = &cfg->val;
1262 
1263 	return &cfg->cfg;
1264 }
1265 
1266 int rsnd_kctrl_new(struct rsnd_mod *mod,
1267 		   struct rsnd_dai_stream *io,
1268 		   struct snd_soc_pcm_runtime *rtd,
1269 		   const unsigned char *name,
1270 		   int (*accept)(struct rsnd_dai_stream *io),
1271 		   void (*update)(struct rsnd_dai_stream *io,
1272 				  struct rsnd_mod *mod),
1273 		   struct rsnd_kctrl_cfg *cfg,
1274 		   const char * const *texts,
1275 		   int size,
1276 		   u32 max)
1277 {
1278 	struct snd_card *card = rtd->card->snd_card;
1279 	struct snd_kcontrol *kctrl;
1280 	struct snd_kcontrol_new knew = {
1281 		.iface		= SNDRV_CTL_ELEM_IFACE_MIXER,
1282 		.name		= name,
1283 		.info		= rsnd_kctrl_info,
1284 		.index		= rtd->num,
1285 		.get		= rsnd_kctrl_get,
1286 		.put		= rsnd_kctrl_put,
1287 		.private_value	= (unsigned long)cfg,
1288 	};
1289 	int ret;
1290 
1291 	if (size > RSND_MAX_CHANNELS)
1292 		return -EINVAL;
1293 
1294 	kctrl = snd_ctl_new1(&knew, mod);
1295 	if (!kctrl)
1296 		return -ENOMEM;
1297 
1298 	ret = snd_ctl_add(card, kctrl);
1299 	if (ret < 0)
1300 		return ret;
1301 
1302 	cfg->texts	= texts;
1303 	cfg->max	= max;
1304 	cfg->size	= size;
1305 	cfg->accept	= accept;
1306 	cfg->update	= update;
1307 	cfg->card	= card;
1308 	cfg->kctrl	= kctrl;
1309 	cfg->io		= io;
1310 
1311 	return 0;
1312 }
1313 
1314 /*
1315  *		snd_soc_platform
1316  */
1317 
1318 #define PREALLOC_BUFFER		(32 * 1024)
1319 #define PREALLOC_BUFFER_MAX	(32 * 1024)
1320 
1321 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1322 {
1323 	struct snd_soc_dai *dai = rtd->cpu_dai;
1324 	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1325 	int ret;
1326 
1327 	ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1328 	if (ret)
1329 		return ret;
1330 
1331 	ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1332 	if (ret)
1333 		return ret;
1334 
1335 	return snd_pcm_lib_preallocate_pages_for_all(
1336 		rtd->pcm,
1337 		SNDRV_DMA_TYPE_CONTINUOUS,
1338 		snd_dma_continuous_data(GFP_KERNEL),
1339 		PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1340 }
1341 
1342 static struct snd_soc_platform_driver rsnd_soc_platform = {
1343 	.ops		= &rsnd_pcm_ops,
1344 	.pcm_new	= rsnd_pcm_new,
1345 };
1346 
1347 static const struct snd_soc_component_driver rsnd_soc_component = {
1348 	.name		= "rsnd",
1349 };
1350 
1351 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1352 				       struct rsnd_dai_stream *io)
1353 {
1354 	int ret;
1355 
1356 	ret = rsnd_dai_call(probe, io, priv);
1357 	if (ret == -EAGAIN) {
1358 		struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1359 		struct rsnd_mod *mod;
1360 		int i;
1361 
1362 		/*
1363 		 * Fallback to PIO mode
1364 		 */
1365 
1366 		/*
1367 		 * call "remove" for SSI/SRC/DVC
1368 		 * SSI will be switch to PIO mode if it was DMA mode
1369 		 * see
1370 		 *	rsnd_dma_init()
1371 		 *	rsnd_ssi_fallback()
1372 		 */
1373 		rsnd_dai_call(remove, io, priv);
1374 
1375 		/*
1376 		 * remove all mod from io
1377 		 * and, re connect ssi
1378 		 */
1379 		for_each_rsnd_mod(i, mod, io)
1380 			rsnd_dai_disconnect(mod, io, i);
1381 		rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1382 
1383 		/*
1384 		 * fallback
1385 		 */
1386 		rsnd_dai_call(fallback, io, priv);
1387 
1388 		/*
1389 		 * retry to "probe".
1390 		 * DAI has SSI which is PIO mode only now.
1391 		 */
1392 		ret = rsnd_dai_call(probe, io, priv);
1393 	}
1394 
1395 	return ret;
1396 }
1397 
1398 /*
1399  *	rsnd probe
1400  */
1401 static int rsnd_probe(struct platform_device *pdev)
1402 {
1403 	struct rsnd_priv *priv;
1404 	struct device *dev = &pdev->dev;
1405 	struct rsnd_dai *rdai;
1406 	int (*probe_func[])(struct rsnd_priv *priv) = {
1407 		rsnd_gen_probe,
1408 		rsnd_dma_probe,
1409 		rsnd_ssi_probe,
1410 		rsnd_ssiu_probe,
1411 		rsnd_src_probe,
1412 		rsnd_ctu_probe,
1413 		rsnd_mix_probe,
1414 		rsnd_dvc_probe,
1415 		rsnd_cmd_probe,
1416 		rsnd_adg_probe,
1417 		rsnd_dai_probe,
1418 	};
1419 	int ret, i;
1420 
1421 	/*
1422 	 *	init priv data
1423 	 */
1424 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1425 	if (!priv) {
1426 		dev_err(dev, "priv allocate failed\n");
1427 		return -ENODEV;
1428 	}
1429 
1430 	priv->pdev	= pdev;
1431 	priv->flags	= (unsigned long)of_device_get_match_data(dev);
1432 	spin_lock_init(&priv->lock);
1433 
1434 	/*
1435 	 *	init each module
1436 	 */
1437 	for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1438 		ret = probe_func[i](priv);
1439 		if (ret)
1440 			return ret;
1441 	}
1442 
1443 	for_each_rsnd_dai(rdai, priv, i) {
1444 		ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1445 		if (ret)
1446 			goto exit_snd_probe;
1447 
1448 		ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1449 		if (ret)
1450 			goto exit_snd_probe;
1451 	}
1452 
1453 	dev_set_drvdata(dev, priv);
1454 
1455 	/*
1456 	 *	asoc register
1457 	 */
1458 	ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1459 	if (ret < 0) {
1460 		dev_err(dev, "cannot snd soc register\n");
1461 		return ret;
1462 	}
1463 
1464 	ret = snd_soc_register_component(dev, &rsnd_soc_component,
1465 					 priv->daidrv, rsnd_rdai_nr(priv));
1466 	if (ret < 0) {
1467 		dev_err(dev, "cannot snd dai register\n");
1468 		goto exit_snd_soc;
1469 	}
1470 
1471 	pm_runtime_enable(dev);
1472 
1473 	dev_info(dev, "probed\n");
1474 	return ret;
1475 
1476 exit_snd_soc:
1477 	snd_soc_unregister_platform(dev);
1478 exit_snd_probe:
1479 	for_each_rsnd_dai(rdai, priv, i) {
1480 		rsnd_dai_call(remove, &rdai->playback, priv);
1481 		rsnd_dai_call(remove, &rdai->capture, priv);
1482 	}
1483 
1484 	return ret;
1485 }
1486 
1487 static int rsnd_remove(struct platform_device *pdev)
1488 {
1489 	struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1490 	struct rsnd_dai *rdai;
1491 	void (*remove_func[])(struct rsnd_priv *priv) = {
1492 		rsnd_ssi_remove,
1493 		rsnd_ssiu_remove,
1494 		rsnd_src_remove,
1495 		rsnd_ctu_remove,
1496 		rsnd_mix_remove,
1497 		rsnd_dvc_remove,
1498 		rsnd_cmd_remove,
1499 		rsnd_adg_remove,
1500 	};
1501 	int ret = 0, i;
1502 
1503 	pm_runtime_disable(&pdev->dev);
1504 
1505 	for_each_rsnd_dai(rdai, priv, i) {
1506 		ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1507 		ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1508 	}
1509 
1510 	for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1511 		remove_func[i](priv);
1512 
1513 	snd_soc_unregister_component(&pdev->dev);
1514 	snd_soc_unregister_platform(&pdev->dev);
1515 
1516 	return ret;
1517 }
1518 
1519 static int rsnd_suspend(struct device *dev)
1520 {
1521 	struct rsnd_priv *priv = dev_get_drvdata(dev);
1522 
1523 	rsnd_adg_clk_disable(priv);
1524 
1525 	return 0;
1526 }
1527 
1528 static int rsnd_resume(struct device *dev)
1529 {
1530 	struct rsnd_priv *priv = dev_get_drvdata(dev);
1531 
1532 	rsnd_adg_clk_enable(priv);
1533 
1534 	return 0;
1535 }
1536 
1537 static const struct dev_pm_ops rsnd_pm_ops = {
1538 	.suspend		= rsnd_suspend,
1539 	.resume			= rsnd_resume,
1540 };
1541 
1542 static struct platform_driver rsnd_driver = {
1543 	.driver	= {
1544 		.name	= "rcar_sound",
1545 		.pm	= &rsnd_pm_ops,
1546 		.of_match_table = rsnd_of_match,
1547 	},
1548 	.probe		= rsnd_probe,
1549 	.remove		= rsnd_remove,
1550 };
1551 module_platform_driver(rsnd_driver);
1552 
1553 MODULE_LICENSE("GPL");
1554 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1555 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1556 MODULE_ALIAS("platform:rcar-pcm-audio");
1557