summaryrefslogtreecommitdiff
path: root/sound/soc/sh/rcar/ssiu.c
blob: 4b8a63e336c778bbd269dcfca4a751a98f76fb18 (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
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
// SPDX-License-Identifier: GPL-2.0
//
// Renesas R-Car SSIU support
//
// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

#include "rsnd.h"

#define SSIU_NAME "ssiu"

struct rsnd_ssiu {
	struct rsnd_mod mod;
	u32 busif_status[8]; /* for BUSIF0 - BUSIF7 */
	unsigned int usrcnt;
	int id;
	int id_sub;
};

/* SSI_MODE */
#define TDM_EXT		(1 << 0)
#define TDM_SPLIT	(1 << 8)

#define rsnd_ssiu_nr(priv) ((priv)->ssiu_nr)
#define rsnd_mod_to_ssiu(_mod) container_of((_mod), struct rsnd_ssiu, mod)
#define for_each_rsnd_ssiu(pos, priv, i)				\
	for (i = 0;							\
	     (i < rsnd_ssiu_nr(priv)) &&				\
		     ((pos) = ((struct rsnd_ssiu *)(priv)->ssiu + i));	\
	     i++)

/*
 *	SSI	Gen2		Gen3
 *	0	BUSIF0-3	BUSIF0-7
 *	1	BUSIF0-3	BUSIF0-7
 *	2	BUSIF0-3	BUSIF0-7
 *	3	BUSIF0		BUSIF0-7
 *	4	BUSIF0		BUSIF0-7
 *	5	BUSIF0		BUSIF0
 *	6	BUSIF0		BUSIF0
 *	7	BUSIF0		BUSIF0
 *	8	BUSIF0		BUSIF0
 *	9	BUSIF0-3	BUSIF0-7
 *	total	22		52
 */
static const int gen2_id[] = { 0, 4,  8, 12, 13, 14, 15, 16, 17, 18 };
static const int gen3_id[] = { 0, 8, 16, 24, 32, 40, 41, 42, 43, 44 };

/* enable busif buffer over/under run interrupt. */
#define rsnd_ssiu_busif_err_irq_enable(mod)  rsnd_ssiu_busif_err_irq_ctrl(mod, 1)
#define rsnd_ssiu_busif_err_irq_disable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 0)
static void rsnd_ssiu_busif_err_irq_ctrl(struct rsnd_mod *mod, int enable)
{
	int id = rsnd_mod_id(mod);
	int shift, offset;
	int i;

	switch (id) {
	case 0:
	case 1:
	case 2:
	case 3:
	case 4:
		shift  = id;
		offset = 0;
		break;
	case 9:
		shift  = 1;
		offset = 1;
		break;
	}

	for (i = 0; i < 4; i++) {
		enum rsnd_reg reg = SSI_SYS_INT_ENABLE((i * 2) + offset);
		u32 val = 0xf << (shift * 4);
		u32 sys_int_enable = rsnd_mod_read(mod, reg);

		if (enable)
			sys_int_enable |= val;
		else
			sys_int_enable &= ~val;
		rsnd_mod_write(mod, reg, sys_int_enable);
	}
}

bool rsnd_ssiu_busif_err_status_clear(struct rsnd_mod *mod)
{
	bool error = false;
	int id = rsnd_mod_id(mod);
	int shift, offset;
	int i;

	switch (id) {
	case 0:
	case 1:
	case 2:
	case 3:
	case 4:
		shift  = id;
		offset = 0;
		break;
	case 9:
		shift  = 1;
		offset = 1;
		break;
	default:
		goto out;
	}

	for (i = 0; i < 4; i++) {
		u32 reg = SSI_SYS_STATUS(i * 2) + offset;
		u32 status = rsnd_mod_read(mod, reg);
		u32 val = 0xf << (shift * 4);

		status &= val;
		if (status) {
			struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
			struct device *dev = rsnd_priv_to_dev(priv);

			rsnd_print_irq_status(dev, "%s err status : 0x%08x\n",
					      rsnd_mod_name(mod), status);
			error = true;
		}
		rsnd_mod_write(mod, reg, val);
	}
out:
	return error;
}

static u32 *rsnd_ssiu_get_status(struct rsnd_mod *mod,
				 struct rsnd_dai_stream *io,
				 enum rsnd_mod_type type)
{
	struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
	int busif = rsnd_mod_id_sub(mod);

	return &ssiu->busif_status[busif];
}

static int rsnd_ssiu_init(struct rsnd_mod *mod,
			  struct rsnd_dai_stream *io,
			  struct rsnd_priv *priv)
{
	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
	u32 ssis = rsnd_ssi_multi_secondaries_runtime(io);
	int use_busif = rsnd_ssi_use_busif(io);
	int id = rsnd_mod_id(mod);
	int is_clk_master = rsnd_rdai_is_clk_master(rdai);
	u32 val1, val2;

	/* clear status */
	rsnd_ssiu_busif_err_status_clear(mod);

	/*
	 * SSI_MODE0
	 */
	rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id);

	/*
	 * SSI_MODE1 / SSI_MODE2
	 *
	 * FIXME
	 * sharing/multi with SSI0 are mainly supported
	 */
	val1 = rsnd_mod_read(mod, SSI_MODE1);
	val2 = rsnd_mod_read(mod, SSI_MODE2);
	if (rsnd_ssi_is_pin_sharing(io)) {

		ssis |= (1 << id);

	} else if (ssis) {
		/*
		 * Multi SSI
		 *
		 * set synchronized bit here
		 */

		/* SSI4 is synchronized with SSI3 */
		if (ssis & (1 << 4))
			val1 |= (1 << 20);
		/* SSI012 are synchronized */
		if (ssis == 0x0006)
			val1 |= (1 << 4);
		/* SSI0129 are synchronized */
		if (ssis == 0x0206)
			val2 |= (1 << 4);
	}

	/* SSI1 is sharing pin with SSI0 */
	if (ssis & (1 << 1))
		val1 |= is_clk_master ? 0x2 : 0x1;

	/* SSI2 is sharing pin with SSI0 */
	if (ssis & (1 << 2))
		val1 |= is_clk_master ?	0x2 << 2 :
					0x1 << 2;
	/* SSI4 is sharing pin with SSI3 */
	if (ssis & (1 << 4))
		val1 |= is_clk_master ? 0x2 << 16 :
					0x1 << 16;
	/* SSI9 is sharing pin with SSI0 */
	if (ssis & (1 << 9))
		val2 |= is_clk_master ? 0x2 : 0x1;

	rsnd_mod_bset(mod, SSI_MODE1, 0x0013001f, val1);
	rsnd_mod_bset(mod, SSI_MODE2, 0x00000017, val2);

	/*
	 * Enable busif buffer over/under run interrupt.
	 * It will be handled from ssi.c
	 * see
	 *	__rsnd_ssi_interrupt()
	 */
	rsnd_ssiu_busif_err_irq_enable(mod);

	return 0;
}

static int rsnd_ssiu_quit(struct rsnd_mod *mod,
			  struct rsnd_dai_stream *io,
			  struct rsnd_priv *priv)
{
	/* disable busif buffer over/under run interrupt. */
	rsnd_ssiu_busif_err_irq_disable(mod);

	return 0;
}

static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = {
	.name		= SSIU_NAME,
	.init		= rsnd_ssiu_init,
	.quit		= rsnd_ssiu_quit,
	.get_status	= rsnd_ssiu_get_status,
};

static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
			       struct rsnd_dai_stream *io,
			       struct rsnd_priv *priv)
{
	struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
	u32 has_hdmi0 = rsnd_flags_has(io, RSND_STREAM_HDMI0);
	u32 has_hdmi1 = rsnd_flags_has(io, RSND_STREAM_HDMI1);
	int ret;
	u32 mode = 0;

	ret = rsnd_ssiu_init(mod, io, priv);
	if (ret < 0)
		return ret;

	ssiu->usrcnt++;

	/*
	 * TDM Extend/Split Mode
	 * see
	 *	rsnd_ssi_config_init()
	 */
	if (rsnd_runtime_is_tdm(io))
		mode = TDM_EXT;
	else if (rsnd_runtime_is_tdm_split(io))
		mode = TDM_SPLIT;

	rsnd_mod_write(mod, SSI_MODE, mode);

	if (rsnd_ssi_use_busif(io)) {
		int id = rsnd_mod_id(mod);
		int busif = rsnd_mod_id_sub(mod);
		enum rsnd_reg adinr_reg, mode_reg, dalign_reg;

		if ((id == 9) && (busif >= 4)) {
			adinr_reg = SSI9_BUSIF_ADINR(busif);
			mode_reg = SSI9_BUSIF_MODE(busif);
			dalign_reg = SSI9_BUSIF_DALIGN(busif);
		} else {
			adinr_reg = SSI_BUSIF_ADINR(busif);
			mode_reg = SSI_BUSIF_MODE(busif);
			dalign_reg = SSI_BUSIF_DALIGN(busif);
		}

		rsnd_mod_write(mod, adinr_reg,
			       rsnd_get_adinr_bit(mod, io) |
			       (rsnd_io_is_play(io) ?
				rsnd_runtime_channel_after_ctu(io) :
				rsnd_runtime_channel_original(io)));
		rsnd_mod_write(mod, mode_reg,
			       rsnd_get_busif_shift(io, mod) | 1);
		rsnd_mod_write(mod, dalign_reg,
			       rsnd_get_dalign(mod, io));
	}

	if (has_hdmi0 || has_hdmi1) {
		enum rsnd_mod_type rsnd_ssi_array[] = {
			RSND_MOD_SSIM1,
			RSND_MOD_SSIM2,
			RSND_MOD_SSIM3,
		};
		struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
		struct rsnd_mod *pos;
		u32 val;
		int i;

		i = rsnd_mod_id(ssi_mod);

		/* output all same SSI as default */
		val =	i << 16 |
			i << 20 |
			i << 24 |
			i << 28 |
			i;

		for_each_rsnd_mod_array(i, pos, io, rsnd_ssi_array) {
			int shift = (i * 4) + 20;

			val	= (val & ~(0xF << shift)) |
				rsnd_mod_id(pos) << shift;
		}

		if (has_hdmi0)
			rsnd_mod_write(mod, HDMI0_SEL, val);
		if (has_hdmi1)
			rsnd_mod_write(mod, HDMI1_SEL, val);
	}

	return 0;
}

static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod,
				struct rsnd_dai_stream *io,
				struct rsnd_priv *priv)
{
	int busif = rsnd_mod_id_sub(mod);

	if (!rsnd_ssi_use_busif(io))
		return 0;

	rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 1 << (busif * 4));

	if (rsnd_ssi_multi_secondaries_runtime(io))
		rsnd_mod_write(mod, SSI_CONTROL, 0x1);

	return 0;
}

static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod,
			       struct rsnd_dai_stream *io,
			       struct rsnd_priv *priv)
{
	struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
	int busif = rsnd_mod_id_sub(mod);

	if (!rsnd_ssi_use_busif(io))
		return 0;

	rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 0);

	if (--ssiu->usrcnt)
		return 0;

	if (rsnd_ssi_multi_secondaries_runtime(io))
		rsnd_mod_write(mod, SSI_CONTROL, 0);

	return 0;
}

static int rsnd_ssiu_id(struct rsnd_mod *mod)
{
	struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);

	/* see rsnd_ssiu_probe() */
	return ssiu->id;
}

static int rsnd_ssiu_id_sub(struct rsnd_mod *mod)
{
	struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);

	/* see rsnd_ssiu_probe() */
	return ssiu->id_sub;
}

static struct dma_chan *rsnd_ssiu_dma_req(struct rsnd_dai_stream *io,
					  struct rsnd_mod *mod)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	int is_play = rsnd_io_is_play(io);
	char *name;

	/*
	 * It should use "rcar_sound,ssiu" on DT.
	 * But, we need to keep compatibility for old version.
	 *
	 * If it has "rcar_sound.ssiu", it will be used.
	 * If not, "rcar_sound.ssi" will be used.
	 * see
	 *	rsnd_ssi_dma_req()
	 *	rsnd_dma_of_path()
	 */

	name = is_play ? "rx" : "tx";

	return rsnd_dma_request_channel(rsnd_ssiu_of_node(priv),
					SSIU_NAME, mod, name);
}

#ifdef CONFIG_DEBUG_FS
static void rsnd_ssiu_debug_info(struct seq_file *m,
				 struct rsnd_dai_stream *io,
				struct rsnd_mod *mod)
{
	rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SSIU,
				  rsnd_mod_id(mod) * 0x80, 0x80);
}
#define DEBUG_INFO .debug_info = rsnd_ssiu_debug_info
#else
#define DEBUG_INFO
#endif

static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = {
	.name		= SSIU_NAME,
	.dma_req	= rsnd_ssiu_dma_req,
	.init		= rsnd_ssiu_init_gen2,
	.start		= rsnd_ssiu_start_gen2,
	.stop		= rsnd_ssiu_stop_gen2,
	.get_status	= rsnd_ssiu_get_status,
	DEBUG_INFO
};

static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id)
{
	if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv)))
		id = 0;

	return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id);
}

static void rsnd_parse_connect_ssiu_compatible(struct rsnd_priv *priv,
					       struct rsnd_dai_stream *io)
{
	struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
	struct rsnd_ssiu *ssiu;
	int is_dma_mode;
	int i;

	if (!ssi_mod)
		return;

	is_dma_mode = rsnd_ssi_is_dma_mode(ssi_mod);

	/* select BUSIF0 */
	for_each_rsnd_ssiu(ssiu, priv, i) {
		struct rsnd_mod *mod = rsnd_mod_get(ssiu);

		if (is_dma_mode &&
		    (rsnd_mod_id(ssi_mod) == rsnd_mod_id(mod)) &&
		    (rsnd_mod_id_sub(mod) == 0)) {
			rsnd_dai_connect(mod, io, mod->type);
			return;
		}
	}
}

void rsnd_parse_connect_ssiu(struct rsnd_dai *rdai,
			     struct device_node *playback,
			     struct device_node *capture)
{
	struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
	struct device *dev = rsnd_priv_to_dev(priv);
	struct device_node *node = rsnd_ssiu_of_node(priv);
	struct rsnd_dai_stream *io_p = &rdai->playback;
	struct rsnd_dai_stream *io_c = &rdai->capture;

	/* use rcar_sound,ssiu if exist */
	if (node) {
		struct device_node *np;
		int i = 0;

		for_each_child_of_node(node, np) {
			struct rsnd_mod *mod;

			i = rsnd_node_fixed_index(dev, np, SSIU_NAME, i);
			if (i < 0) {
				of_node_put(np);
				break;
			}

			mod = rsnd_ssiu_mod_get(priv, i);

			if (np == playback)
				rsnd_dai_connect(mod, io_p, mod->type);
			if (np == capture)
				rsnd_dai_connect(mod, io_c, mod->type);
			i++;
		}

		of_node_put(node);
	}

	/* Keep DT compatibility */
	if (!rsnd_io_to_mod_ssiu(io_p))
		rsnd_parse_connect_ssiu_compatible(priv, io_p);
	if (!rsnd_io_to_mod_ssiu(io_c))
		rsnd_parse_connect_ssiu_compatible(priv, io_c);
}

int rsnd_ssiu_probe(struct rsnd_priv *priv)
{
	struct device *dev = rsnd_priv_to_dev(priv);
	struct device_node *node;
	struct rsnd_ssiu *ssiu;
	struct rsnd_mod_ops *ops;
	const int *list = NULL;
	int i, nr;

	/*
	 * Keep DT compatibility.
	 * if it has "rcar_sound,ssiu", use it.
	 * if not, use "rcar_sound,ssi"
	 * see
	 *	rsnd_ssiu_bufsif_to_id()
	 */
	node = rsnd_ssiu_of_node(priv);
	if (node)
		nr = rsnd_node_count(priv, node, SSIU_NAME);
	else
		nr = priv->ssi_nr;

	if (!nr)
		return -EINVAL;

	ssiu	= devm_kcalloc(dev, nr, sizeof(*ssiu), GFP_KERNEL);
	if (!ssiu)
		return -ENOMEM;

	priv->ssiu	= ssiu;
	priv->ssiu_nr	= nr;

	if (rsnd_is_gen1(priv))
		ops = &rsnd_ssiu_ops_gen1;
	else
		ops = &rsnd_ssiu_ops_gen2;

	/* Keep compatibility */
	nr = 0;
	if ((node) &&
	    (ops == &rsnd_ssiu_ops_gen2)) {
		ops->id		= rsnd_ssiu_id;
		ops->id_sub	= rsnd_ssiu_id_sub;

		if (rsnd_is_gen2(priv)) {
			list	= gen2_id;
			nr	= ARRAY_SIZE(gen2_id);
		} else if (rsnd_is_gen3(priv)) {
			list	= gen3_id;
			nr	= ARRAY_SIZE(gen3_id);
		} else {
			dev_err(dev, "unknown SSIU\n");
			return -ENODEV;
		}
	}

	for_each_rsnd_ssiu(ssiu, priv, i) {
		int ret;

		if (node) {
			int j;

			/*
			 * see
			 *	rsnd_ssiu_get_id()
			 *	rsnd_ssiu_get_id_sub()
			 */
			for (j = 0; j < nr; j++) {
				if (list[j] > i)
					break;
				ssiu->id	= j;
				ssiu->id_sub	= i - list[ssiu->id];
			}
		} else {
			ssiu->id = i;
		}

		ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu),
				    ops, NULL, RSND_MOD_SSIU, i);
		if (ret)
			return ret;
	}

	return 0;
}

void rsnd_ssiu_remove(struct rsnd_priv *priv)
{
	struct rsnd_ssiu *ssiu;
	int i;

	for_each_rsnd_ssiu(ssiu, priv, i) {
		rsnd_mod_quit(rsnd_mod_get(ssiu));
	}
}