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
|
/*
* Renesas R-Car SSIU/SSI support
*
* Copyright (C) 2013 Renesas Solutions Corp.
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* Based on fsi.c
* Kuninori Morimoto <morimoto.kuninori@renesas.com>
*
* 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/delay.h>
#include "rsnd.h"
#define RSND_SSI_NAME_SIZE 16
/*
* SSICR
*/
#define FORCE (1 << 31) /* Fixed */
#define DMEN (1 << 28) /* DMA Enable */
#define UIEN (1 << 27) /* Underflow Interrupt Enable */
#define OIEN (1 << 26) /* Overflow Interrupt Enable */
#define IIEN (1 << 25) /* Idle Mode Interrupt Enable */
#define DIEN (1 << 24) /* Data Interrupt Enable */
#define DWL_8 (0 << 19) /* Data Word Length */
#define DWL_16 (1 << 19) /* Data Word Length */
#define DWL_18 (2 << 19) /* Data Word Length */
#define DWL_20 (3 << 19) /* Data Word Length */
#define DWL_22 (4 << 19) /* Data Word Length */
#define DWL_24 (5 << 19) /* Data Word Length */
#define DWL_32 (6 << 19) /* Data Word Length */
#define SWL_32 (3 << 16) /* R/W System Word Length */
#define SCKD (1 << 15) /* Serial Bit Clock Direction */
#define SWSD (1 << 14) /* Serial WS Direction */
#define SCKP (1 << 13) /* Serial Bit Clock Polarity */
#define SWSP (1 << 12) /* Serial WS Polarity */
#define SDTA (1 << 10) /* Serial Data Alignment */
#define DEL (1 << 8) /* Serial Data Delay */
#define CKDV(v) (v << 4) /* Serial Clock Division Ratio */
#define TRMD (1 << 1) /* Transmit/Receive Mode Select */
#define EN (1 << 0) /* SSI Module Enable */
/*
* SSISR
*/
#define UIRQ (1 << 27) /* Underflow Error Interrupt Status */
#define OIRQ (1 << 26) /* Overflow Error Interrupt Status */
#define IIRQ (1 << 25) /* Idle Mode Interrupt Status */
#define DIRQ (1 << 24) /* Data Interrupt Status Flag */
/*
* SSIWSR
*/
#define CONT (1 << 8) /* WS Continue Function */
#define SSI_NAME "ssi"
struct rsnd_ssi {
struct rsnd_ssi_platform_info *info; /* rcar_snd.h */
struct rsnd_ssi *parent;
struct rsnd_mod mod;
u32 cr_own;
u32 cr_clk;
int chan;
int err;
unsigned int usrcnt;
};
#define for_each_rsnd_ssi(pos, priv, i) \
for (i = 0; \
(i < rsnd_ssi_nr(priv)) && \
((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \
i++)
#define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
#define rsnd_ssi_pio_available(ssi) ((ssi)->info->irq > 0)
#define rsnd_ssi_parent(ssi) ((ssi)->parent)
#define rsnd_ssi_mode_flags(p) ((p)->info->flags)
#define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id)
#define rsnd_ssi_of_node(priv) \
of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,ssi")
int rsnd_ssi_use_busif(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int use_busif = 0;
if (!rsnd_ssi_is_dma_mode(mod))
return 0;
if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF))
use_busif = 1;
if (rsnd_io_to_mod_src(io))
use_busif = 1;
return use_busif;
}
static void rsnd_ssi_status_check(struct rsnd_mod *mod,
u32 bit)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct device *dev = rsnd_priv_to_dev(priv);
u32 status;
int i;
for (i = 0; i < 1024; i++) {
status = rsnd_mod_read(mod, SSISR);
if (status & bit)
return;
udelay(50);
}
dev_warn(dev, "status check failed\n");
}
static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi,
struct rsnd_dai_stream *io)
{
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_mod *mod = rsnd_mod_get(ssi);
int j, ret;
int ssi_clk_mul_table[] = {
1, 2, 4, 8, 16, 6, 12,
};
unsigned int main_rate;
unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime);
/*
* Find best clock, and try to start ADG
*/
for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
/*
* this driver is assuming that
* system word is 64fs (= 2 x 32bit)
* see rsnd_ssi_init()
*/
main_rate = rate * 32 * 2 * ssi_clk_mul_table[j];
ret = rsnd_adg_ssi_clk_try_start(mod, main_rate);
if (0 == ret) {
ssi->cr_clk = FORCE | SWL_32 |
SCKD | SWSD | CKDV(j);
dev_dbg(dev, "%s[%d] outputs %u Hz\n",
rsnd_mod_name(mod),
rsnd_mod_id(mod), rate);
return 0;
}
}
dev_err(dev, "unsupported clock rate\n");
return -EIO;
}
static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi)
{
struct rsnd_mod *mod = rsnd_mod_get(ssi);
ssi->cr_clk = 0;
rsnd_adg_ssi_clk_stop(mod);
}
static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
struct rsnd_dai_stream *io)
{
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_mod *mod = rsnd_mod_get(ssi);
u32 cr_mode;
u32 cr;
if (0 == ssi->usrcnt) {
rsnd_mod_power_on(mod);
if (rsnd_rdai_is_clk_master(rdai)) {
struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi);
if (ssi_parent)
rsnd_ssi_hw_start(ssi_parent, io);
else
rsnd_ssi_master_clk_start(ssi, io);
}
}
if (rsnd_ssi_is_dma_mode(mod)) {
cr_mode = UIEN | OIEN | /* over/under run */
DMEN; /* DMA : enable DMA */
} else {
cr_mode = DIEN; /* PIO : enable Data interrupt */
}
cr = ssi->cr_own |
ssi->cr_clk |
cr_mode |
EN;
rsnd_mod_write(mod, SSICR, cr);
/* enable WS continue */
if (rsnd_rdai_is_clk_master(rdai))
rsnd_mod_write(mod, SSIWSR, CONT);
/* clear error status */
rsnd_mod_write(mod, SSISR, 0);
ssi->usrcnt++;
dev_dbg(dev, "%s[%d] hw started\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
}
static void rsnd_ssi_hw_stop(struct rsnd_dai_stream *io, struct rsnd_ssi *ssi)
{
struct rsnd_mod *mod = rsnd_mod_get(ssi);
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct device *dev = rsnd_priv_to_dev(priv);
u32 cr;
if (0 == ssi->usrcnt) {
dev_err(dev, "%s called without starting\n", __func__);
return;
}
ssi->usrcnt--;
if (0 == ssi->usrcnt) {
/*
* disable all IRQ,
* and, wait all data was sent
*/
cr = ssi->cr_own |
ssi->cr_clk;
rsnd_mod_write(mod, SSICR, cr | EN);
rsnd_ssi_status_check(mod, DIRQ);
/*
* disable SSI,
* and, wait idle state
*/
rsnd_mod_write(mod, SSICR, cr); /* disabled all */
rsnd_ssi_status_check(mod, IIRQ);
if (rsnd_rdai_is_clk_master(rdai)) {
struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi);
if (ssi_parent)
rsnd_ssi_hw_stop(io, ssi_parent);
else
rsnd_ssi_master_clk_stop(ssi);
}
rsnd_mod_power_off(mod);
ssi->chan = 0;
}
dev_dbg(dev, "%s[%d] hw stopped\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
}
/*
* SSI mod common functions
*/
static int rsnd_ssi_init(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
u32 cr;
cr = FORCE;
/*
* always use 32bit system word for easy clock calculation.
* see also rsnd_ssi_master_clk_enable()
*/
cr |= SWL_32;
/*
* init clock settings for SSICR
*/
switch (runtime->sample_bits) {
case 16:
cr |= DWL_16;
break;
case 32:
cr |= DWL_24;
break;
default:
return -EIO;
}
if (rdai->bit_clk_inv)
cr |= SCKP;
if (rdai->frm_clk_inv)
cr |= SWSP;
if (rdai->data_alignment)
cr |= SDTA;
if (rdai->sys_delay)
cr |= DEL;
if (rsnd_io_is_play(io))
cr |= TRMD;
/*
* set ssi parameter
*/
ssi->cr_own = cr;
ssi->err = -1; /* ignore 1st error */
return 0;
}
static int rsnd_ssi_quit(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct device *dev = rsnd_priv_to_dev(priv);
if (ssi->err > 0)
dev_warn(dev, "%s[%d] under/over flow err = %d\n",
rsnd_mod_name(mod), rsnd_mod_id(mod), ssi->err);
ssi->cr_own = 0;
ssi->err = 0;
return 0;
}
static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi);
int chan = params_channels(params);
/*
* Already working.
* It will happen if SSI has parent/child connection.
*/
if (ssi->usrcnt) {
/*
* it is error if child <-> parent SSI uses
* different channels.
*/
if (ssi->chan != chan)
return -EIO;
}
/* It will be removed on rsnd_ssi_hw_stop */
ssi->chan = chan;
if (ssi_parent)
return rsnd_ssi_hw_params(rsnd_mod_get(ssi_parent), io,
substream, params);
return 0;
}
static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status)
{
struct rsnd_mod *mod = rsnd_mod_get(ssi);
/* under/over flow error */
if (status & (UIRQ | OIRQ)) {
ssi->err++;
/* clear error status */
rsnd_mod_write(mod, SSISR, 0);
}
}
static int rsnd_ssi_start(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
rsnd_src_ssiu_start(mod, io, rsnd_ssi_use_busif(io, mod));
rsnd_ssi_hw_start(ssi, io);
rsnd_src_ssi_irq_enable(mod);
return 0;
}
static int rsnd_ssi_stop(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
rsnd_src_ssi_irq_disable(mod);
rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR));
rsnd_ssi_hw_stop(io, ssi);
rsnd_src_ssiu_stop(mod, io);
return 0;
}
static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
int is_dma = rsnd_ssi_is_dma_mode(mod);
u32 status;
bool elapsed = false;
spin_lock(&priv->lock);
/* ignore all cases if not working */
if (!rsnd_io_is_working(io))
goto rsnd_ssi_interrupt_out;
status = rsnd_mod_read(mod, SSISR);
/* PIO only */
if (!is_dma && (status & DIRQ)) {
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
u32 *buf = (u32 *)(runtime->dma_area +
rsnd_dai_pointer_offset(io, 0));
/*
* 8/16/32 data can be assesse to TDR/RDR register
* directly as 32bit data
* see rsnd_ssi_init()
*/
if (rsnd_io_is_play(io))
rsnd_mod_write(mod, SSITDR, *buf);
else
*buf = rsnd_mod_read(mod, SSIRDR);
elapsed = rsnd_dai_pointer_update(io, sizeof(*buf));
}
/* DMA only */
if (is_dma && (status & (UIRQ | OIRQ))) {
struct device *dev = rsnd_priv_to_dev(priv);
/*
* restart SSI
*/
dev_dbg(dev, "%s[%d] restart\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
rsnd_ssi_stop(mod, io, priv);
if (ssi->err < 1024)
rsnd_ssi_start(mod, io, priv);
else
dev_warn(dev, "no more SSI restart\n");
}
rsnd_ssi_record_error(ssi, status);
rsnd_ssi_interrupt_out:
spin_unlock(&priv->lock);
if (elapsed)
rsnd_dai_period_elapsed(io);
}
static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
{
struct rsnd_mod *mod = data;
rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
return IRQ_HANDLED;
}
/*
* SSI PIO
*/
static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int ret;
ret = devm_request_irq(dev, ssi->info->irq,
rsnd_ssi_interrupt,
IRQF_SHARED,
dev_name(dev), mod);
return ret;
}
static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
.name = SSI_NAME,
.probe = rsnd_ssi_pio_probe,
.init = rsnd_ssi_init,
.quit = rsnd_ssi_quit,
.start = rsnd_ssi_start,
.stop = rsnd_ssi_stop,
.hw_params = rsnd_ssi_hw_params,
};
static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct device *dev = rsnd_priv_to_dev(priv);
int dma_id = ssi->info->dma_id;
int ret;
ret = devm_request_irq(dev, ssi->info->irq,
rsnd_ssi_interrupt,
IRQF_SHARED,
dev_name(dev), mod);
if (ret)
return ret;
ret = rsnd_dma_init(
io, rsnd_mod_to_dma(mod),
dma_id);
return ret;
}
static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct device *dev = rsnd_priv_to_dev(priv);
int irq = ssi->info->irq;
rsnd_dma_quit(io, rsnd_mod_to_dma(mod));
/* PIO will request IRQ again */
devm_free_irq(dev, irq, mod);
return 0;
}
static int rsnd_ssi_fallback(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct device *dev = rsnd_priv_to_dev(priv);
/*
* fallback to PIO
*
* SSI .probe might be called again.
* see
* rsnd_rdai_continuance_probe()
*/
mod->ops = &rsnd_ssi_pio_ops;
dev_info(dev, "%s[%d] fallback to PIO mode\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
return 0;
}
static int rsnd_ssi_dma_start(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
rsnd_dma_start(io, dma);
rsnd_ssi_start(mod, io, priv);
return 0;
}
static int rsnd_ssi_dma_stop(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
rsnd_ssi_stop(mod, io, priv);
rsnd_dma_stop(io, dma);
return 0;
}
static struct dma_chan *rsnd_ssi_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;
if (rsnd_ssi_use_busif(io, mod))
name = is_play ? "rxu" : "txu";
else
name = is_play ? "rx" : "tx";
return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
mod, name);
}
static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
.name = SSI_NAME,
.dma_req = rsnd_ssi_dma_req,
.probe = rsnd_ssi_dma_probe,
.remove = rsnd_ssi_dma_remove,
.init = rsnd_ssi_init,
.quit = rsnd_ssi_quit,
.start = rsnd_ssi_dma_start,
.stop = rsnd_ssi_dma_stop,
.fallback = rsnd_ssi_fallback,
.hw_params = rsnd_ssi_hw_params,
};
int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
{
return mod->ops == &rsnd_ssi_dma_ops;
}
/*
* Non SSI
*/
static struct rsnd_mod_ops rsnd_ssi_non_ops = {
.name = SSI_NAME,
};
/*
* ssi mod function
*/
struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
{
if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
id = 0;
return rsnd_mod_get((struct rsnd_ssi *)(priv->ssi) + id);
}
int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE);
}
static void rsnd_ssi_parent_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi)
{
struct rsnd_mod *mod = rsnd_mod_get(ssi);
if (!rsnd_ssi_is_pin_sharing(mod))
return;
switch (rsnd_mod_id(mod)) {
case 1:
case 2:
ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 0));
break;
case 4:
ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 3));
break;
case 8:
ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 7));
break;
}
}
static void rsnd_of_parse_ssi(struct platform_device *pdev,
const struct rsnd_of_data *of_data,
struct rsnd_priv *priv)
{
struct device_node *node;
struct device_node *np;
struct rsnd_ssi_platform_info *ssi_info;
struct rcar_snd_info *info = rsnd_priv_to_info(priv);
struct device *dev = &pdev->dev;
int nr, i;
node = rsnd_ssi_of_node(priv);
if (!node)
return;
nr = of_get_child_count(node);
if (!nr)
goto rsnd_of_parse_ssi_end;
ssi_info = devm_kzalloc(dev,
sizeof(struct rsnd_ssi_platform_info) * nr,
GFP_KERNEL);
if (!ssi_info) {
dev_err(dev, "ssi info allocation error\n");
goto rsnd_of_parse_ssi_end;
}
info->ssi_info = ssi_info;
info->ssi_info_nr = nr;
i = -1;
for_each_child_of_node(node, np) {
i++;
ssi_info = info->ssi_info + i;
/*
* pin settings
*/
if (of_get_property(np, "shared-pin", NULL))
ssi_info->flags |= RSND_SSI_CLK_PIN_SHARE;
/*
* irq
*/
ssi_info->irq = irq_of_parse_and_map(np, 0);
/*
* DMA
*/
ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ?
0 : 1;
if (of_get_property(np, "no-busif", NULL))
ssi_info->flags |= RSND_SSI_NO_BUSIF;
}
rsnd_of_parse_ssi_end:
of_node_put(node);
}
int rsnd_ssi_probe(struct platform_device *pdev,
const struct rsnd_of_data *of_data,
struct rsnd_priv *priv)
{
struct rcar_snd_info *info = rsnd_priv_to_info(priv);
struct rsnd_ssi_platform_info *pinfo;
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_mod_ops *ops;
struct clk *clk;
struct rsnd_ssi *ssi;
char name[RSND_SSI_NAME_SIZE];
int i, nr, ret;
rsnd_of_parse_ssi(pdev, of_data, priv);
/*
* init SSI
*/
nr = info->ssi_info_nr;
ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL);
if (!ssi)
return -ENOMEM;
priv->ssi = ssi;
priv->ssi_nr = nr;
for_each_rsnd_ssi(ssi, priv, i) {
pinfo = &info->ssi_info[i];
snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
SSI_NAME, i);
clk = devm_clk_get(dev, name);
if (IS_ERR(clk))
return PTR_ERR(clk);
ssi->info = pinfo;
ops = &rsnd_ssi_non_ops;
if (pinfo->dma_id > 0)
ops = &rsnd_ssi_dma_ops;
else if (rsnd_ssi_pio_available(ssi))
ops = &rsnd_ssi_pio_ops;
ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
RSND_MOD_SSI, i);
if (ret)
return ret;
rsnd_ssi_parent_setup(priv, ssi);
}
return 0;
}
void rsnd_ssi_remove(struct platform_device *pdev,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi;
int i;
for_each_rsnd_ssi(ssi, priv, i) {
rsnd_mod_quit(rsnd_mod_get(ssi));
}
}
|