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14#include <linux/delay.h>
15#include "rsnd.h"
16#define RSND_SSI_NAME_SIZE 16
17
18
19
20
21#define FORCE (1 << 31)
22#define DMEN (1 << 28)
23#define UIEN (1 << 27)
24#define OIEN (1 << 26)
25#define IIEN (1 << 25)
26#define DIEN (1 << 24)
27#define CHNL_4 (1 << 22)
28#define CHNL_6 (2 << 22)
29#define CHNL_8 (3 << 22)
30#define DWL_8 (0 << 19)
31#define DWL_16 (1 << 19)
32#define DWL_18 (2 << 19)
33#define DWL_20 (3 << 19)
34#define DWL_22 (4 << 19)
35#define DWL_24 (5 << 19)
36#define DWL_32 (6 << 19)
37
38#define SWL_32 (3 << 16)
39#define SCKD (1 << 15)
40#define SWSD (1 << 14)
41#define SCKP (1 << 13)
42#define SWSP (1 << 12)
43#define SDTA (1 << 10)
44#define PDTA (1 << 9)
45#define DEL (1 << 8)
46#define CKDV(v) (v << 4)
47#define TRMD (1 << 1)
48#define EN (1 << 0)
49
50
51
52
53#define UIRQ (1 << 27)
54#define OIRQ (1 << 26)
55#define IIRQ (1 << 25)
56#define DIRQ (1 << 24)
57
58
59
60
61#define CONT (1 << 8)
62#define WS_MODE (1 << 0)
63
64#define SSI_NAME "ssi"
65
66struct rsnd_ssi {
67 struct rsnd_mod mod;
68 struct rsnd_mod *dma;
69
70 u32 flags;
71 u32 cr_own;
72 u32 cr_clk;
73 u32 cr_mode;
74 u32 wsr;
75 int chan;
76 int rate;
77 int irq;
78 unsigned int usrcnt;
79};
80
81
82#define RSND_SSI_CLK_PIN_SHARE (1 << 0)
83#define RSND_SSI_NO_BUSIF (1 << 1)
84
85#define for_each_rsnd_ssi(pos, priv, i) \
86 for (i = 0; \
87 (i < rsnd_ssi_nr(priv)) && \
88 ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \
89 i++)
90
91#define rsnd_ssi_get(priv, id) ((struct rsnd_ssi *)(priv->ssi) + id)
92#define rsnd_ssi_to_dma(mod) ((ssi)->dma)
93#define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
94#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
95#define rsnd_ssi_mode_flags(p) ((p)->flags)
96#define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io))
97#define rsnd_ssi_is_multi_slave(mod, io) \
98 (rsnd_ssi_multi_slaves(io) & (1 << rsnd_mod_id(mod)))
99#define rsnd_ssi_is_run_mods(mod, io) \
100 (rsnd_ssi_run_mods(io) & (1 << rsnd_mod_id(mod)))
101
102int rsnd_ssi_use_busif(struct rsnd_dai_stream *io)
103{
104 struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
105 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
106 int use_busif = 0;
107
108 if (!rsnd_ssi_is_dma_mode(mod))
109 return 0;
110
111 if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF))
112 use_busif = 1;
113 if (rsnd_io_to_mod_src(io))
114 use_busif = 1;
115
116 return use_busif;
117}
118
119static void rsnd_ssi_status_clear(struct rsnd_mod *mod)
120{
121 rsnd_mod_write(mod, SSISR, 0);
122}
123
124static u32 rsnd_ssi_status_get(struct rsnd_mod *mod)
125{
126 return rsnd_mod_read(mod, SSISR);
127}
128
129static void rsnd_ssi_status_check(struct rsnd_mod *mod,
130 u32 bit)
131{
132 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
133 struct device *dev = rsnd_priv_to_dev(priv);
134 u32 status;
135 int i;
136
137 for (i = 0; i < 1024; i++) {
138 status = rsnd_ssi_status_get(mod);
139 if (status & bit)
140 return;
141
142 udelay(50);
143 }
144
145 dev_warn(dev, "%s[%d] status check failed\n",
146 rsnd_mod_name(mod), rsnd_mod_id(mod));
147}
148
149static u32 rsnd_ssi_multi_slaves(struct rsnd_dai_stream *io)
150{
151 struct rsnd_mod *mod;
152 enum rsnd_mod_type types[] = {
153 RSND_MOD_SSIM1,
154 RSND_MOD_SSIM2,
155 RSND_MOD_SSIM3,
156 };
157 int i, mask;
158
159 mask = 0;
160 for (i = 0; i < ARRAY_SIZE(types); i++) {
161 mod = rsnd_io_to_mod(io, types[i]);
162 if (!mod)
163 continue;
164
165 mask |= 1 << rsnd_mod_id(mod);
166 }
167
168 return mask;
169}
170
171static u32 rsnd_ssi_run_mods(struct rsnd_dai_stream *io)
172{
173 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
174 struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
175
176 return rsnd_ssi_multi_slaves_runtime(io) |
177 1 << rsnd_mod_id(ssi_mod) |
178 1 << rsnd_mod_id(ssi_parent_mod);
179}
180
181u32 rsnd_ssi_multi_slaves_runtime(struct rsnd_dai_stream *io)
182{
183 if (rsnd_runtime_is_ssi_multi(io))
184 return rsnd_ssi_multi_slaves(io);
185
186 return 0;
187}
188
189static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod,
190 struct rsnd_dai_stream *io)
191{
192 struct rsnd_priv *priv = rsnd_io_to_priv(io);
193 struct device *dev = rsnd_priv_to_dev(priv);
194 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
195 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
196 struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
197 int chan = rsnd_runtime_channel_for_ssi(io);
198 int j, ret;
199 int ssi_clk_mul_table[] = {
200 1, 2, 4, 8, 16, 6, 12,
201 };
202 unsigned int main_rate;
203 unsigned int rate = rsnd_io_is_play(io) ?
204 rsnd_src_get_out_rate(priv, io) :
205 rsnd_src_get_in_rate(priv, io);
206
207 if (!rsnd_rdai_is_clk_master(rdai))
208 return 0;
209
210 if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io))
211 return 0;
212
213 if (rsnd_ssi_is_multi_slave(mod, io))
214 return 0;
215
216 if (ssi->usrcnt > 1) {
217 if (ssi->rate != rate) {
218 dev_err(dev, "SSI parent/child should use same rate\n");
219 return -EINVAL;
220 }
221
222 return 0;
223 }
224
225
226
227
228 for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
229
230
231
232
233
234
235 main_rate = rate * 32 * chan * ssi_clk_mul_table[j];
236
237 ret = rsnd_adg_ssi_clk_try_start(mod, main_rate);
238 if (0 == ret) {
239 ssi->cr_clk = FORCE | SWL_32 |
240 SCKD | SWSD | CKDV(j);
241 ssi->wsr = CONT;
242
243 ssi->rate = rate;
244
245 dev_dbg(dev, "%s[%d] outputs %u Hz\n",
246 rsnd_mod_name(mod),
247 rsnd_mod_id(mod), rate);
248
249 return 0;
250 }
251 }
252
253 dev_err(dev, "unsupported clock rate\n");
254 return -EIO;
255}
256
257static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod,
258 struct rsnd_dai_stream *io)
259{
260 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
261 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
262 struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
263
264 if (!rsnd_rdai_is_clk_master(rdai))
265 return;
266
267 if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io))
268 return;
269
270 if (ssi->usrcnt > 1)
271 return;
272
273 ssi->cr_clk = 0;
274 ssi->rate = 0;
275
276 rsnd_adg_ssi_clk_stop(mod);
277}
278
279static void rsnd_ssi_config_init(struct rsnd_mod *mod,
280 struct rsnd_dai_stream *io)
281{
282 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
283 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
284 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
285 u32 cr_own;
286 u32 cr_mode;
287 u32 wsr;
288 int is_tdm;
289
290 is_tdm = rsnd_runtime_is_ssi_tdm(io);
291
292
293
294
295
296 cr_own = FORCE | SWL_32 | PDTA;
297
298 if (rdai->bit_clk_inv)
299 cr_own |= SCKP;
300 if (rdai->frm_clk_inv ^ is_tdm)
301 cr_own |= SWSP;
302 if (rdai->data_alignment)
303 cr_own |= SDTA;
304 if (rdai->sys_delay)
305 cr_own |= DEL;
306 if (rsnd_io_is_play(io))
307 cr_own |= TRMD;
308
309 switch (runtime->sample_bits) {
310 case 16:
311 cr_own |= DWL_16;
312 break;
313 case 32:
314 cr_own |= DWL_24;
315 break;
316 }
317
318 if (rsnd_ssi_is_dma_mode(mod)) {
319 cr_mode = UIEN | OIEN |
320 DMEN;
321 } else {
322 cr_mode = DIEN;
323 }
324
325
326
327
328
329
330 wsr = ssi->wsr;
331 if (is_tdm) {
332 wsr |= WS_MODE;
333 cr_own |= CHNL_8;
334 }
335
336 ssi->cr_own = cr_own;
337 ssi->cr_mode = cr_mode;
338 ssi->wsr = wsr;
339}
340
341static void rsnd_ssi_register_setup(struct rsnd_mod *mod)
342{
343 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
344
345 rsnd_mod_write(mod, SSIWSR, ssi->wsr);
346 rsnd_mod_write(mod, SSICR, ssi->cr_own |
347 ssi->cr_clk |
348 ssi->cr_mode);
349}
350
351
352
353
354static int rsnd_ssi_init(struct rsnd_mod *mod,
355 struct rsnd_dai_stream *io,
356 struct rsnd_priv *priv)
357{
358 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
359 int ret;
360
361 if (!rsnd_ssi_is_run_mods(mod, io))
362 return 0;
363
364 ssi->usrcnt++;
365
366 rsnd_mod_power_on(mod);
367
368 ret = rsnd_ssi_master_clk_start(mod, io);
369 if (ret < 0)
370 return ret;
371
372 if (!rsnd_ssi_is_parent(mod, io))
373 rsnd_ssi_config_init(mod, io);
374
375 rsnd_ssi_register_setup(mod);
376
377
378 rsnd_ssi_status_clear(mod);
379
380 return 0;
381}
382
383static int rsnd_ssi_quit(struct rsnd_mod *mod,
384 struct rsnd_dai_stream *io,
385 struct rsnd_priv *priv)
386{
387 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
388 struct device *dev = rsnd_priv_to_dev(priv);
389
390 if (!rsnd_ssi_is_run_mods(mod, io))
391 return 0;
392
393 if (!ssi->usrcnt) {
394 dev_err(dev, "%s[%d] usrcnt error\n",
395 rsnd_mod_name(mod), rsnd_mod_id(mod));
396 return -EIO;
397 }
398
399 if (!rsnd_ssi_is_parent(mod, io))
400 ssi->cr_own = 0;
401
402 rsnd_ssi_master_clk_stop(mod, io);
403
404 rsnd_mod_power_off(mod);
405
406 ssi->usrcnt--;
407
408 return 0;
409}
410
411static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
412 struct rsnd_dai_stream *io,
413 struct snd_pcm_substream *substream,
414 struct snd_pcm_hw_params *params)
415{
416 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
417 int chan = params_channels(params);
418
419
420
421
422
423 if (ssi->usrcnt > 1) {
424
425
426
427
428 if (ssi->chan != chan)
429 return -EIO;
430 }
431
432 ssi->chan = chan;
433
434 return 0;
435}
436
437static int rsnd_ssi_start(struct rsnd_mod *mod,
438 struct rsnd_dai_stream *io,
439 struct rsnd_priv *priv)
440{
441 if (!rsnd_ssi_is_run_mods(mod, io))
442 return 0;
443
444
445
446
447
448 if (rsnd_ssi_multi_slaves_runtime(io))
449 return 0;
450
451 rsnd_mod_bset(mod, SSICR, EN, EN);
452
453 return 0;
454}
455
456static int rsnd_ssi_stop(struct rsnd_mod *mod,
457 struct rsnd_dai_stream *io,
458 struct rsnd_priv *priv)
459{
460 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
461 u32 cr;
462
463 if (!rsnd_ssi_is_run_mods(mod, io))
464 return 0;
465
466
467
468
469
470
471
472 if (ssi->usrcnt > 1)
473 return 0;
474
475
476
477
478
479 cr = ssi->cr_own |
480 ssi->cr_clk;
481
482 rsnd_mod_write(mod, SSICR, cr | EN);
483 rsnd_ssi_status_check(mod, DIRQ);
484
485
486
487
488
489 rsnd_mod_write(mod, SSICR, cr);
490 rsnd_ssi_status_check(mod, IIRQ);
491
492 return 0;
493}
494
495static int rsnd_ssi_irq(struct rsnd_mod *mod,
496 struct rsnd_dai_stream *io,
497 struct rsnd_priv *priv,
498 int enable)
499{
500 u32 val = 0;
501
502 if (rsnd_is_gen1(priv))
503 return 0;
504
505 if (rsnd_ssi_is_parent(mod, io))
506 return 0;
507
508 if (!rsnd_ssi_is_run_mods(mod, io))
509 return 0;
510
511 if (enable)
512 val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000;
513
514 rsnd_mod_write(mod, SSI_INT_ENABLE, val);
515
516 return 0;
517}
518
519static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
520 struct rsnd_dai_stream *io)
521{
522 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
523 int is_dma = rsnd_ssi_is_dma_mode(mod);
524 u32 status;
525 bool elapsed = false;
526 bool stop = false;
527
528 spin_lock(&priv->lock);
529
530
531 if (!rsnd_io_is_working(io))
532 goto rsnd_ssi_interrupt_out;
533
534 status = rsnd_ssi_status_get(mod);
535
536
537 if (!is_dma && (status & DIRQ)) {
538 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
539 u32 *buf = (u32 *)(runtime->dma_area +
540 rsnd_dai_pointer_offset(io, 0));
541
542
543
544
545
546
547 if (rsnd_io_is_play(io))
548 rsnd_mod_write(mod, SSITDR, *buf);
549 else
550 *buf = rsnd_mod_read(mod, SSIRDR);
551
552 elapsed = rsnd_dai_pointer_update(io, sizeof(*buf));
553 }
554
555
556 if (is_dma && (status & (UIRQ | OIRQ)))
557 stop = true;
558
559 rsnd_ssi_status_clear(mod);
560rsnd_ssi_interrupt_out:
561 spin_unlock(&priv->lock);
562
563 if (elapsed)
564 rsnd_dai_period_elapsed(io);
565
566 if (stop)
567 snd_pcm_stop_xrun(io->substream);
568
569}
570
571static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
572{
573 struct rsnd_mod *mod = data;
574
575 rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
576
577 return IRQ_HANDLED;
578}
579
580
581
582
583static void rsnd_ssi_parent_attach(struct rsnd_mod *mod,
584 struct rsnd_dai_stream *io)
585{
586 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
587 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
588
589 if (!__rsnd_ssi_is_pin_sharing(mod))
590 return;
591
592 if (!rsnd_rdai_is_clk_master(rdai))
593 return;
594
595 switch (rsnd_mod_id(mod)) {
596 case 1:
597 case 2:
598 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP);
599 break;
600 case 4:
601 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP);
602 break;
603 case 8:
604 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP);
605 break;
606 }
607}
608
609static int rsnd_ssi_pcm_new(struct rsnd_mod *mod,
610 struct rsnd_dai_stream *io,
611 struct snd_soc_pcm_runtime *rtd)
612{
613
614
615
616
617
618 rsnd_ssi_parent_attach(mod, io);
619
620 return 0;
621}
622
623static int rsnd_ssi_common_probe(struct rsnd_mod *mod,
624 struct rsnd_dai_stream *io,
625 struct rsnd_priv *priv)
626{
627 struct device *dev = rsnd_priv_to_dev(priv);
628 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
629 int ret;
630
631
632
633
634
635 if (rsnd_ssi_is_multi_slave(mod, io))
636 return 0;
637
638
639
640
641
642
643 ret = rsnd_ssiu_attach(io, mod);
644 if (ret < 0)
645 return ret;
646
647 ret = devm_request_irq(dev, ssi->irq,
648 rsnd_ssi_interrupt,
649 IRQF_SHARED,
650 dev_name(dev), mod);
651
652 return ret;
653}
654
655static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
656 .name = SSI_NAME,
657 .probe = rsnd_ssi_common_probe,
658 .init = rsnd_ssi_init,
659 .quit = rsnd_ssi_quit,
660 .start = rsnd_ssi_start,
661 .stop = rsnd_ssi_stop,
662 .irq = rsnd_ssi_irq,
663 .pcm_new = rsnd_ssi_pcm_new,
664 .hw_params = rsnd_ssi_hw_params,
665};
666
667static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
668 struct rsnd_dai_stream *io,
669 struct rsnd_priv *priv)
670{
671 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
672 int dma_id = 0;
673 int ret;
674
675
676
677
678
679 if (rsnd_ssi_is_multi_slave(mod, io))
680 return 0;
681
682 ret = rsnd_ssi_common_probe(mod, io, priv);
683 if (ret)
684 return ret;
685
686
687 ret = rsnd_dma_attach(io, mod, &ssi->dma, dma_id);
688
689 return ret;
690}
691
692static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
693 struct rsnd_dai_stream *io,
694 struct rsnd_priv *priv)
695{
696 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
697 struct device *dev = rsnd_priv_to_dev(priv);
698 int irq = ssi->irq;
699
700
701 devm_free_irq(dev, irq, mod);
702
703 return 0;
704}
705
706static int rsnd_ssi_fallback(struct rsnd_mod *mod,
707 struct rsnd_dai_stream *io,
708 struct rsnd_priv *priv)
709{
710 struct device *dev = rsnd_priv_to_dev(priv);
711
712
713
714
715
716
717
718
719 mod->ops = &rsnd_ssi_pio_ops;
720
721 dev_info(dev, "%s[%d] fallback to PIO mode\n",
722 rsnd_mod_name(mod), rsnd_mod_id(mod));
723
724 return 0;
725}
726
727static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
728 struct rsnd_mod *mod)
729{
730 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
731 int is_play = rsnd_io_is_play(io);
732 char *name;
733
734 if (rsnd_ssi_use_busif(io))
735 name = is_play ? "rxu" : "txu";
736 else
737 name = is_play ? "rx" : "tx";
738
739 return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
740 mod, name);
741}
742
743static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
744 .name = SSI_NAME,
745 .dma_req = rsnd_ssi_dma_req,
746 .probe = rsnd_ssi_dma_probe,
747 .remove = rsnd_ssi_dma_remove,
748 .init = rsnd_ssi_init,
749 .quit = rsnd_ssi_quit,
750 .start = rsnd_ssi_start,
751 .stop = rsnd_ssi_stop,
752 .irq = rsnd_ssi_irq,
753 .pcm_new = rsnd_ssi_pcm_new,
754 .fallback = rsnd_ssi_fallback,
755 .hw_params = rsnd_ssi_hw_params,
756};
757
758int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
759{
760 return mod->ops == &rsnd_ssi_dma_ops;
761}
762
763
764
765
766
767static struct rsnd_mod_ops rsnd_ssi_non_ops = {
768 .name = SSI_NAME,
769};
770
771
772
773
774static void rsnd_ssi_connect(struct rsnd_mod *mod,
775 struct rsnd_dai_stream *io)
776{
777 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
778 enum rsnd_mod_type types[] = {
779 RSND_MOD_SSI,
780 RSND_MOD_SSIM1,
781 RSND_MOD_SSIM2,
782 RSND_MOD_SSIM3,
783 };
784 enum rsnd_mod_type type;
785 int i;
786
787
788 for (i = 0; i < ARRAY_SIZE(types); i++) {
789 type = types[i];
790 if (!rsnd_io_to_mod(io, type)) {
791 rsnd_dai_connect(mod, io, type);
792 rsnd_set_slot(rdai, 2 * (i + 1), (i + 1));
793 return;
794 }
795 }
796}
797
798void rsnd_parse_connect_ssi(struct rsnd_dai *rdai,
799 struct device_node *playback,
800 struct device_node *capture)
801{
802 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
803 struct device_node *node;
804 struct device_node *np;
805 struct rsnd_mod *mod;
806 int i;
807
808 node = rsnd_ssi_of_node(priv);
809 if (!node)
810 return;
811
812 i = 0;
813 for_each_child_of_node(node, np) {
814 mod = rsnd_ssi_mod_get(priv, i);
815 if (np == playback)
816 rsnd_ssi_connect(mod, &rdai->playback);
817 if (np == capture)
818 rsnd_ssi_connect(mod, &rdai->capture);
819 i++;
820 }
821
822 of_node_put(node);
823}
824
825struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
826{
827 if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
828 id = 0;
829
830 return rsnd_mod_get(rsnd_ssi_get(priv, id));
831}
832
833int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
834{
835 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
836
837 return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE);
838}
839
840static u32 *rsnd_ssi_get_status(struct rsnd_dai_stream *io,
841 struct rsnd_mod *mod,
842 enum rsnd_mod_type type)
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 if (type == RSND_MOD_SSIP)
870 return &io->parent_ssi_status;
871
872 return rsnd_mod_get_status(io, mod, type);
873}
874
875int rsnd_ssi_probe(struct rsnd_priv *priv)
876{
877 struct device_node *node;
878 struct device_node *np;
879 struct device *dev = rsnd_priv_to_dev(priv);
880 struct rsnd_mod_ops *ops;
881 struct clk *clk;
882 struct rsnd_ssi *ssi;
883 char name[RSND_SSI_NAME_SIZE];
884 int i, nr, ret;
885
886 node = rsnd_ssi_of_node(priv);
887 if (!node)
888 return -EINVAL;
889
890 nr = of_get_child_count(node);
891 if (!nr) {
892 ret = -EINVAL;
893 goto rsnd_ssi_probe_done;
894 }
895
896 ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL);
897 if (!ssi) {
898 ret = -ENOMEM;
899 goto rsnd_ssi_probe_done;
900 }
901
902 priv->ssi = ssi;
903 priv->ssi_nr = nr;
904
905 i = 0;
906 for_each_child_of_node(node, np) {
907 ssi = rsnd_ssi_get(priv, i);
908
909 snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
910 SSI_NAME, i);
911
912 clk = devm_clk_get(dev, name);
913 if (IS_ERR(clk)) {
914 ret = PTR_ERR(clk);
915 goto rsnd_ssi_probe_done;
916 }
917
918 if (of_get_property(np, "shared-pin", NULL))
919 ssi->flags |= RSND_SSI_CLK_PIN_SHARE;
920
921 if (of_get_property(np, "no-busif", NULL))
922 ssi->flags |= RSND_SSI_NO_BUSIF;
923
924 ssi->irq = irq_of_parse_and_map(np, 0);
925 if (!ssi->irq) {
926 ret = -EINVAL;
927 goto rsnd_ssi_probe_done;
928 }
929
930 ops = &rsnd_ssi_non_ops;
931 if (of_get_property(np, "pio-transfer", NULL))
932 ops = &rsnd_ssi_pio_ops;
933 else
934 ops = &rsnd_ssi_dma_ops;
935
936 ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
937 rsnd_ssi_get_status, RSND_MOD_SSI, i);
938 if (ret)
939 goto rsnd_ssi_probe_done;
940
941 i++;
942 }
943
944 ret = 0;
945
946rsnd_ssi_probe_done:
947 of_node_put(node);
948
949 return ret;
950}
951
952void rsnd_ssi_remove(struct rsnd_priv *priv)
953{
954 struct rsnd_ssi *ssi;
955 int i;
956
957 for_each_rsnd_ssi(ssi, priv, i) {
958 rsnd_mod_quit(rsnd_mod_get(ssi));
959 }
960}
961