summaryrefslogtreecommitdiffstats
path: root/sound/soc/sh/siu_dai.c
blob: edacfeb13b94e3956589a999aeb78de2e2815635 (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
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
/*
 * siu_dai.c - ALSA SoC driver for Renesas SH7343, SH7722 SIU peripheral.
 *
 * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 * Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/module.h>

#include <asm/clock.h>
#include <asm/siu.h>

#include <sound/control.h>
#include <sound/soc.h>

#include "siu.h"

/* Board specifics */
#if defined(CONFIG_CPU_SUBTYPE_SH7722)
# define SIU_MAX_VOLUME		0x1000
#else
# define SIU_MAX_VOLUME		0x7fff
#endif

#define PRAM_SIZE	0x2000
#define XRAM_SIZE	0x800
#define YRAM_SIZE	0x800

#define XRAM_OFFSET	0x4000
#define YRAM_OFFSET	0x6000
#define REG_OFFSET	0xc000

#define PLAYBACK_ENABLED	1
#define CAPTURE_ENABLED		2

#define VOLUME_CAPTURE		0
#define VOLUME_PLAYBACK		1
#define DFLT_VOLUME_LEVEL	0x08000800

/*
 * SPDIF is only available on port A and on some SIU implementations it is only
 * available for input. Due to the lack of hardware to test it, SPDIF is left
 * disabled in this driver version
 */
struct format_flag {
	u32	i2s;
	u32	pcm;
	u32	spdif;
	u32	mask;
};

struct port_flag {
	struct format_flag	playback;
	struct format_flag	capture;
};

struct siu_info *siu_i2s_data;

static struct port_flag siu_flags[SIU_PORT_NUM] = {
	[SIU_PORT_A] = {
		.playback = {
			.i2s	= 0x50000000,
			.pcm	= 0x40000000,
			.spdif	= 0x80000000,	/* not on all SIU versions */
			.mask	= 0xd0000000,
		},
		.capture = {
			.i2s	= 0x05000000,
			.pcm	= 0x04000000,
			.spdif	= 0x08000000,
			.mask	= 0x0d000000,
		},
	},
	[SIU_PORT_B] = {
		.playback = {
			.i2s	= 0x00500000,
			.pcm	= 0x00400000,
			.spdif	= 0,		/* impossible - turn off */
			.mask	= 0x00500000,
		},
		.capture = {
			.i2s	= 0x00050000,
			.pcm	= 0x00040000,
			.spdif	= 0,		/* impossible - turn off */
			.mask	= 0x00050000,
		},
	},
};

static void siu_dai_start(struct siu_port *port_info)
{
	struct siu_info *info = siu_i2s_data;
	u32 __iomem *base = info->reg;

	dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);

	/* Turn on SIU clock */
	pm_runtime_get_sync(info->dev);

	/* Issue software reset to siu */
	siu_write32(base + SIU_SRCTL, 0);

	/* Wait for the reset to take effect */
	udelay(1);

	port_info->stfifo = 0;
	port_info->trdat = 0;

	/* portA, portB, SIU operate */
	siu_write32(base + SIU_SRCTL, 0x301);

	/* portA=256fs, portB=256fs */
	siu_write32(base + SIU_CKCTL, 0x40400000);

	/* portA's BRG does not divide SIUCKA */
	siu_write32(base + SIU_BRGASEL, 0);
	siu_write32(base + SIU_BRRA, 0);

	/* portB's BRG divides SIUCKB by half */
	siu_write32(base + SIU_BRGBSEL, 1);
	siu_write32(base + SIU_BRRB, 0);

	siu_write32(base + SIU_IFCTL, 0x44440000);

	/* portA: 32 bit/fs, master; portB: 32 bit/fs, master */
	siu_write32(base + SIU_SFORM, 0x0c0c0000);

	/*
	 * Volume levels: looks like the DSP firmware implements volume controls
	 * differently from what's described in the datasheet
	 */
	siu_write32(base + SIU_SBDVCA, port_info->playback.volume);
	siu_write32(base + SIU_SBDVCB, port_info->capture.volume);
}

static void siu_dai_stop(struct siu_port *port_info)
{
	struct siu_info *info = siu_i2s_data;
	u32 __iomem *base = info->reg;

	/* SIU software reset */
	siu_write32(base + SIU_SRCTL, 0);

	/* Turn off SIU clock */
	pm_runtime_put_sync(info->dev);
}

static void siu_dai_spbAselect(struct siu_port *port_info)
{
	struct siu_info *info = siu_i2s_data;
	struct siu_firmware *fw = &info->fw;
	u32 *ydef = fw->yram0;
	u32 idx;

	/* path A use */
	if (!info->port_id)
		idx = 1;		/* portA */
	else
		idx = 2;		/* portB */

	ydef[0] = (fw->spbpar[idx].ab1a << 16) |
		(fw->spbpar[idx].ab0a << 8) |
		(fw->spbpar[idx].dir << 7) | 3;
	ydef[1] = fw->yram0[1];	/* 0x03000300 */
	ydef[2] = (16 / 2) << 24;
	ydef[3] = fw->yram0[3];	/* 0 */
	ydef[4] = fw->yram0[4];	/* 0 */
	ydef[7] = fw->spbpar[idx].event;
	port_info->stfifo |= fw->spbpar[idx].stfifo;
	port_info->trdat |= fw->spbpar[idx].trdat;
}

static void siu_dai_spbBselect(struct siu_port *port_info)
{
	struct siu_info *info = siu_i2s_data;
	struct siu_firmware *fw = &info->fw;
	u32 *ydef = fw->yram0;
	u32 idx;

	/* path B use */
	if (!info->port_id)
		idx = 7;		/* portA */
	else
		idx = 8;		/* portB */

	ydef[5] = (fw->spbpar[idx].ab1a << 16) |
		(fw->spbpar[idx].ab0a << 8) | 1;
	ydef[6] = fw->spbpar[idx].event;
	port_info->stfifo |= fw->spbpar[idx].stfifo;
	port_info->trdat |= fw->spbpar[idx].trdat;
}

static void siu_dai_open(struct siu_stream *siu_stream)
{
	struct siu_info *info = siu_i2s_data;
	u32 __iomem *base = info->reg;
	u32 srctl, ifctl;

	srctl = siu_read32(base + SIU_SRCTL);
	ifctl = siu_read32(base + SIU_IFCTL);

	switch (info->port_id) {
	case SIU_PORT_A:
		/* portA operates */
		srctl |= 0x200;
		ifctl &= ~0xc2;
		break;
	case SIU_PORT_B:
		/* portB operates */
		srctl |= 0x100;
		ifctl &= ~0x31;
		break;
	}

	siu_write32(base + SIU_SRCTL, srctl);
	/* Unmute and configure portA */
	siu_write32(base + SIU_IFCTL, ifctl);
}

/*
 * At the moment only fixed Left-upper, Left-lower, Right-upper, Right-lower
 * packing is supported
 */
static void siu_dai_pcmdatapack(struct siu_stream *siu_stream)
{
	struct siu_info *info = siu_i2s_data;
	u32 __iomem *base = info->reg;
	u32 dpak;

	dpak = siu_read32(base + SIU_DPAK);

	switch (info->port_id) {
	case SIU_PORT_A:
		dpak &= ~0xc0000000;
		break;
	case SIU_PORT_B:
		dpak &= ~0x00c00000;
		break;
	}

	siu_write32(base + SIU_DPAK, dpak);
}

static int siu_dai_spbstart(struct siu_port *port_info)
{
	struct siu_info *info = siu_i2s_data;
	u32 __iomem *base = info->reg;
	struct siu_firmware *fw = &info->fw;
	u32 *ydef = fw->yram0;
	int cnt;
	u32 __iomem *add;
	u32 *ptr;

	/* Load SPB Program in PRAM */
	ptr = fw->pram0;
	add = info->pram;
	for (cnt = 0; cnt < PRAM0_SIZE; cnt++, add++, ptr++)
		siu_write32(add, *ptr);

	ptr = fw->pram1;
	add = info->pram + (0x0100 / sizeof(u32));
	for (cnt = 0; cnt < PRAM1_SIZE; cnt++, add++, ptr++)
		siu_write32(add, *ptr);

	/* XRAM initialization */
	add = info->xram;
	for (cnt = 0; cnt < XRAM0_SIZE + XRAM1_SIZE + XRAM2_SIZE; cnt++, add++)
		siu_write32(add, 0);

	/* YRAM variable area initialization */
	add = info->yram;
	for (cnt = 0; cnt < YRAM_DEF_SIZE; cnt++, add++)
		siu_write32(add, ydef[cnt]);

	/* YRAM FIR coefficient area initialization */
	add = info->yram + (0x0200 / sizeof(u32));
	for (cnt = 0; cnt < YRAM_FIR_SIZE; cnt++, add++)
		siu_write32(add, fw->yram_fir_coeff[cnt]);

	/* YRAM IIR coefficient area initialization */
	add = info->yram + (0x0600 / sizeof(u32));
	for (cnt = 0; cnt < YRAM_IIR_SIZE; cnt++, add++)
		siu_write32(add, 0);

	siu_write32(base + SIU_TRDAT, port_info->trdat);
	port_info->trdat = 0x0;


	/* SPB start condition: software */
	siu_write32(base + SIU_SBACTIV, 0);
	/* Start SPB */
	siu_write32(base + SIU_SBCTL, 0xc0000000);
	/* Wait for program to halt */
	cnt = 0x10000;
	while (--cnt && siu_read32(base + SIU_SBCTL) != 0x80000000)
		cpu_relax();

	if (!cnt)
		return -EBUSY;

	/* SPB program start address setting */
	siu_write32(base + SIU_SBPSET, 0x00400000);
	/* SPB hardware start(FIFOCTL source) */
	siu_write32(base + SIU_SBACTIV, 0xc0000000);

	return 0;
}

static void siu_dai_spbstop(struct siu_port *port_info)
{
	struct siu_info *info = siu_i2s_data;
	u32 __iomem *base = info->reg;

	siu_write32(base + SIU_SBACTIV, 0);
	/* SPB stop */
	siu_write32(base + SIU_SBCTL, 0);

	port_info->stfifo = 0;
}

/*		API functions		*/

/* Playback and capture hardware properties are identical */
static struct snd_pcm_hardware siu_dai_pcm_hw = {
	.info			= SNDRV_PCM_INFO_INTERLEAVED,
	.formats		= SNDRV_PCM_FMTBIT_S16,
	.rates			= SNDRV_PCM_RATE_8000_48000,
	.rate_min		= 8000,
	.rate_max		= 48000,
	.channels_min		= 2,
	.channels_max		= 2,
	.buffer_bytes_max	= SIU_BUFFER_BYTES_MAX,
	.period_bytes_min	= SIU_PERIOD_BYTES_MIN,
	.period_bytes_max	= SIU_PERIOD_BYTES_MAX,
	.periods_min		= SIU_PERIODS_MIN,
	.periods_max		= SIU_PERIODS_MAX,
};

static int siu_dai_info_volume(struct snd_kcontrol *kctrl,
			       struct snd_ctl_elem_info *uinfo)
{
	struct siu_port *port_info = snd_kcontrol_chip(kctrl);

	dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);

	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = SIU_MAX_VOLUME;

	return 0;
}

static int siu_dai_get_volume(struct snd_kcontrol *kctrl,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct siu_port *port_info = snd_kcontrol_chip(kctrl);
	struct device *dev = port_info->pcm->card->dev;
	u32 vol;

	dev_dbg(dev, "%s\n", __func__);

	switch (kctrl->private_value) {
	case VOLUME_PLAYBACK:
		/* Playback is always on port 0 */
		vol = port_info->playback.volume;
		ucontrol->value.integer.value[0] = vol & 0xffff;
		ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
		break;
	case VOLUME_CAPTURE:
		/* Capture is always on port 1 */
		vol = port_info->capture.volume;
		ucontrol->value.integer.value[0] = vol & 0xffff;
		ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
		break;
	default:
		dev_err(dev, "%s() invalid private_value=%ld\n",
			__func__, kctrl->private_value);
		return -EINVAL;
	}

	return 0;
}

static int siu_dai_put_volume(struct snd_kcontrol *kctrl,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct siu_port *port_info = snd_kcontrol_chip(kctrl);
	struct device *dev = port_info->pcm->card->dev;
	struct siu_info *info = siu_i2s_data;
	u32 __iomem *base = info->reg;
	u32 new_vol;
	u32 cur_vol;

	dev_dbg(dev, "%s\n", __func__);

	if (ucontrol->value.integer.value[0] < 0 ||
	    ucontrol->value.integer.value[0] > SIU_MAX_VOLUME ||
	    ucontrol->value.integer.value[1] < 0 ||
	    ucontrol->value.integer.value[1] > SIU_MAX_VOLUME)
		return -EINVAL;

	new_vol = ucontrol->value.integer.value[0] |
		ucontrol->value.integer.value[1] << 16;

	/* See comment above - DSP firmware implementation */
	switch (kctrl->private_value) {
	case VOLUME_PLAYBACK:
		/* Playback is always on port 0 */
		cur_vol = port_info->playback.volume;
		siu_write32(base + SIU_SBDVCA, new_vol);
		port_info->playback.volume = new_vol;
		break;
	case VOLUME_CAPTURE:
		/* Capture is always on port 1 */
		cur_vol = port_info->capture.volume;
		siu_write32(base + SIU_SBDVCB, new_vol);
		port_info->capture.volume = new_vol;
		break;
	default:
		dev_err(dev, "%s() invalid private_value=%ld\n",
			__func__, kctrl->private_value);
		return -EINVAL;
	}

	if (cur_vol != new_vol)
		return 1;

	return 0;
}

static struct snd_kcontrol_new playback_controls = {
	.iface		= SNDRV_CTL_ELEM_IFACE_MIXER,
	.name		= "PCM Playback Volume",
	.index		= 0,
	.info		= siu_dai_info_volume,
	.get		= siu_dai_get_volume,
	.put		= siu_dai_put_volume,
	.private_value	= VOLUME_PLAYBACK,
};

static struct snd_kcontrol_new capture_controls = {
	.iface		= SNDRV_CTL_ELEM_IFACE_MIXER,
	.name		= "PCM Capture Volume",
	.index		= 0,
	.info		= siu_dai_info_volume,
	.get		= siu_dai_get_volume,
	.put		= siu_dai_put_volume,
	.private_value	= VOLUME_CAPTURE,
};

int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card)
{
	struct device *dev = card->dev;
	struct snd_kcontrol *kctrl;
	int ret;

	*port_info = kzalloc(sizeof(**port_info), GFP_KERNEL);
	if (!*port_info)
		return -ENOMEM;

	dev_dbg(dev, "%s: port #%d@%p\n", __func__, port, *port_info);

	(*port_info)->playback.volume = DFLT_VOLUME_LEVEL;
	(*port_info)->capture.volume = DFLT_VOLUME_LEVEL;

	/*
	 * Add mixer support. The SPB is used to change the volume. Both
	 * ports use the same SPB. Therefore, we only register one
	 * control instance since it will be used by both channels.
	 * In error case we continue without controls.
	 */
	kctrl = snd_ctl_new1(&playback_controls, *port_info);
	ret = snd_ctl_add(card, kctrl);
	if (ret < 0)
		dev_err(dev,
			"failed to add playback controls %p port=%d err=%d\n",
			kctrl, port, ret);

	kctrl = snd_ctl_new1(&capture_controls, *port_info);
	ret = snd_ctl_add(card, kctrl);
	if (ret < 0)
		dev_err(dev,
			"failed to add capture controls %p port=%d err=%d\n",
			kctrl, port, ret);

	return 0;
}

void siu_free_port(struct siu_port *port_info)
{
	kfree(port_info);
}

static int siu_dai_startup(struct snd_pcm_substream *substream,
			   struct snd_soc_dai *dai)
{
	struct siu_info *info = snd_soc_dai_get_drvdata(dai);
	struct snd_pcm_runtime *rt = substream->runtime;
	struct siu_port	*port_info = siu_port_info(substream);
	int ret;

	dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
		info->port_id, port_info);

	snd_soc_set_runtime_hwparams(substream, &siu_dai_pcm_hw);

	ret = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
	if (unlikely(ret < 0))
		return ret;

	siu_dai_start(port_info);

	return 0;
}

static void siu_dai_shutdown(struct snd_pcm_substream *substream,
			     struct snd_soc_dai *dai)
{
	struct siu_info *info = snd_soc_dai_get_drvdata(dai);
	struct siu_port	*port_info = siu_port_info(substream);

	dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
		info->port_id, port_info);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		port_info->play_cap &= ~PLAYBACK_ENABLED;
	else
		port_info->play_cap &= ~CAPTURE_ENABLED;

	/* Stop the siu if the other stream is not using it */
	if (!port_info->play_cap) {
		/* during stmread or stmwrite ? */
		BUG_ON(port_info->playback.rw_flg || port_info->capture.rw_flg);
		siu_dai_spbstop(port_info);
		siu_dai_stop(port_info);
	}
}

/* PCM part of siu_dai_playback_prepare() / siu_dai_capture_prepare() */
static int siu_dai_prepare(struct snd_pcm_substream *substream,
			   struct snd_soc_dai *dai)
{
	struct siu_info *info = snd_soc_dai_get_drvdata(dai);
	struct snd_pcm_runtime *rt = substream->runtime;
	struct siu_port *port_info = siu_port_info(substream);
	struct siu_stream *siu_stream;
	int self, ret;

	dev_dbg(substream->pcm->card->dev,
		"%s: port %d, active streams %lx, %d channels\n",
		__func__, info->port_id, port_info->play_cap, rt->channels);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		self = PLAYBACK_ENABLED;
		siu_stream = &port_info->playback;
	} else {
		self = CAPTURE_ENABLED;
		siu_stream = &port_info->capture;
	}

	/* Set up the siu if not already done */
	if (!port_info->play_cap) {
		siu_stream->rw_flg = 0;	/* stream-data transfer flag */

		siu_dai_spbAselect(port_info);
		siu_dai_spbBselect(port_info);

		siu_dai_open(siu_stream);

		siu_dai_pcmdatapack(siu_stream);

		ret = siu_dai_spbstart(port_info);
		if (ret < 0)
			goto fail;
	} else {
		ret = 0;
	}

	port_info->play_cap |= self;

fail:
	return ret;
}

/*
 * SIU can set bus format to I2S / PCM / SPDIF independently for playback and
 * capture, however, the current API sets the bus format globally for a DAI.
 */
static int siu_dai_set_fmt(struct snd_soc_dai *dai,
			   unsigned int fmt)
{
	struct siu_info *info = snd_soc_dai_get_drvdata(dai);
	u32 __iomem *base = info->reg;
	u32 ifctl;

	dev_dbg(dai->dev, "%s: fmt 0x%x on port %d\n",
		__func__, fmt, info->port_id);

	if (info->port_id < 0)
		return -ENODEV;

	/* Here select between I2S / PCM / SPDIF */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		ifctl = siu_flags[info->port_id].playback.i2s |
			siu_flags[info->port_id].capture.i2s;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		ifctl = siu_flags[info->port_id].playback.pcm |
			siu_flags[info->port_id].capture.pcm;
		break;
	/* SPDIF disabled - see comment at the top */
	default:
		return -EINVAL;
	}

	ifctl |= ~(siu_flags[info->port_id].playback.mask |
		   siu_flags[info->port_id].capture.mask) &
		siu_read32(base + SIU_IFCTL);
	siu_write32(base + SIU_IFCTL, ifctl);

	return 0;
}

static int siu_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
			      unsigned int freq, int dir)
{
	struct clk *siu_clk, *parent_clk;
	char *siu_name, *parent_name;
	int ret;

	if (dir != SND_SOC_CLOCK_IN)
		return -EINVAL;

	dev_dbg(dai->dev, "%s: using clock %d\n", __func__, clk_id);

	switch (clk_id) {
	case SIU_CLKA_PLL:
		siu_name = "siua_clk";
		parent_name = "pll_clk";
		break;
	case SIU_CLKA_EXT:
		siu_name = "siua_clk";
		parent_name = "siumcka_clk";
		break;
	case SIU_CLKB_PLL:
		siu_name = "siub_clk";
		parent_name = "pll_clk";
		break;
	case SIU_CLKB_EXT:
		siu_name = "siub_clk";
		parent_name = "siumckb_clk";
		break;
	default:
		return -EINVAL;
	}

	siu_clk = clk_get(dai->dev, siu_name);
	if (IS_ERR(siu_clk)) {
		dev_err(dai->dev, "%s: cannot get a SIU clock: %ld\n", __func__,
			PTR_ERR(siu_clk));
		return PTR_ERR(siu_clk);
	}

	parent_clk = clk_get(dai->dev, parent_name);
	if (IS_ERR(parent_clk)) {
		ret = PTR_ERR(parent_clk);
		dev_err(dai->dev, "cannot get a SIU clock parent: %d\n", ret);
		goto epclkget;
	}

	ret = clk_set_parent(siu_clk, parent_clk);
	if (ret < 0) {
		dev_err(dai->dev, "cannot reparent the SIU clock: %d\n", ret);
		goto eclksetp;
	}

	ret = clk_set_rate(siu_clk, freq);
	if (ret < 0)
		dev_err(dai->dev, "cannot set SIU clock rate: %d\n", ret);

	/* TODO: when clkdev gets reference counting we'll move these to siu_dai_shutdown() */
eclksetp:
	clk_put(parent_clk);
epclkget:
	clk_put(siu_clk);

	return ret;
}

static struct snd_soc_dai_ops siu_dai_ops = {
	.startup	= siu_dai_startup,
	.shutdown	= siu_dai_shutdown,
	.prepare	= siu_dai_prepare,
	.set_sysclk	= siu_dai_set_sysclk,
	.set_fmt	= siu_dai_set_fmt,
};

static struct snd_soc_dai_driver siu_i2s_dai = {
	.name	= "siu-i2s-dai",
	.playback = {
		.channels_min = 2,
		.channels_max = 2,
		.formats = SNDRV_PCM_FMTBIT_S16,
		.rates = SNDRV_PCM_RATE_8000_48000,
	},
	.capture = {
		.channels_min = 2,
		.channels_max = 2,
		.formats = SNDRV_PCM_FMTBIT_S16,
		.rates = SNDRV_PCM_RATE_8000_48000,
	 },
	.ops = &siu_dai_ops,
};

static int __devinit siu_probe(struct platform_device *pdev)
{
	const struct firmware *fw_entry;
	struct resource *res, *region;
	struct siu_info *info;
	int ret;

	info = kmalloc(sizeof(*info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;
	siu_i2s_data = info;
	info->dev = &pdev->dev;

	ret = request_firmware(&fw_entry, "siu_spb.bin", &pdev->dev);
	if (ret)
		goto ereqfw;

	/*
	 * Loaded firmware is "const" - read only, but we have to modify it in
	 * snd_siu_sh7343_spbAselect() and snd_siu_sh7343_spbBselect()
	 */
	memcpy(&info->fw, fw_entry->data, fw_entry->size);

	release_firmware(fw_entry);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		ret = -ENODEV;
		goto egetres;
	}

	region = request_mem_region(res->start, resource_size(res),
				    pdev->name);
	if (!region) {
		dev_err(&pdev->dev, "SIU region already claimed\n");
		ret = -EBUSY;
		goto ereqmemreg;
	}

	ret = -ENOMEM;
	info->pram = ioremap(res->start, PRAM_SIZE);
	if (!info->pram)
		goto emappram;
	info->xram = ioremap(res->start + XRAM_OFFSET, XRAM_SIZE);
	if (!info->xram)
		goto emapxram;
	info->yram = ioremap(res->start + YRAM_OFFSET, YRAM_SIZE);
	if (!info->yram)
		goto emapyram;
	info->reg = ioremap(res->start + REG_OFFSET, resource_size(res) -
			    REG_OFFSET);
	if (!info->reg)
		goto emapreg;

	dev_set_drvdata(&pdev->dev, info);

	/* register using ARRAY version so we can keep dai name */
	ret = snd_soc_register_dais(&pdev->dev, &siu_i2s_dai, 1);
	if (ret < 0)
		goto edaiinit;

	ret = snd_soc_register_platform(&pdev->dev, &siu_platform);
	if (ret < 0)
		goto esocregp;

	pm_runtime_enable(&pdev->dev);

	return ret;

esocregp:
	snd_soc_unregister_dai(&pdev->dev);
edaiinit:
	iounmap(info->reg);
emapreg:
	iounmap(info->yram);
emapyram:
	iounmap(info->xram);
emapxram:
	iounmap(info->pram);
emappram:
	release_mem_region(res->start, resource_size(res));
ereqmemreg:
egetres:
ereqfw:
	kfree(info);

	return ret;
}

static int __devexit siu_remove(struct platform_device *pdev)
{
	struct siu_info *info = dev_get_drvdata(&pdev->dev);
	struct resource *res;

	pm_runtime_disable(&pdev->dev);

	snd_soc_unregister_platform(&pdev->dev);
	snd_soc_unregister_dai(&pdev->dev);

	iounmap(info->reg);
	iounmap(info->yram);
	iounmap(info->xram);
	iounmap(info->pram);
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res)
		release_mem_region(res->start, resource_size(res));
	kfree(info);

	return 0;
}

static struct platform_driver siu_driver = {
	.driver 	= {
		.owner	= THIS_MODULE,
		.name	= "siu-pcm-audio",
	},
	.probe		= siu_probe,
	.remove		= __devexit_p(siu_remove),
};

static int __init siu_init(void)
{
	return platform_driver_register(&siu_driver);
}

static void __exit siu_exit(void)
{
	platform_driver_unregister(&siu_driver);
}

module_init(siu_init)
module_exit(siu_exit)

MODULE_AUTHOR("Carlos Munoz <carlos@kenati.com>");
MODULE_DESCRIPTION("ALSA SoC SH7722 SIU driver");
MODULE_LICENSE("GPL");