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powerpc: use _GLOBAL_TOC for memmove
[deliverable/linux.git] / sound / soc / sh / rcar / core.c
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 <linux/shdma-base.h>
98 #include "rsnd.h"
99
100 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
101 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
102
103 static struct rsnd_of_data rsnd_of_data_gen1 = {
104 .flags = RSND_GEN1,
105 };
106
107 static struct rsnd_of_data rsnd_of_data_gen2 = {
108 .flags = RSND_GEN2,
109 };
110
111 static struct of_device_id rsnd_of_match[] = {
112 { .compatible = "renesas,rcar_sound-gen1", .data = &rsnd_of_data_gen1 },
113 { .compatible = "renesas,rcar_sound-gen2", .data = &rsnd_of_data_gen2 },
114 {},
115 };
116 MODULE_DEVICE_TABLE(of, rsnd_of_match);
117
118 /*
119 * rsnd_platform functions
120 */
121 #define rsnd_platform_call(priv, dai, func, param...) \
122 (!(priv->info->func) ? 0 : \
123 priv->info->func(param))
124
125 #define rsnd_is_enable_path(io, name) \
126 ((io)->info ? (io)->info->name : NULL)
127 #define rsnd_info_id(priv, io, name) \
128 ((io)->info->name - priv->info->name##_info)
129
130 /*
131 * rsnd_mod functions
132 */
133 char *rsnd_mod_name(struct rsnd_mod *mod)
134 {
135 if (!mod || !mod->ops)
136 return "unknown";
137
138 return mod->ops->name;
139 }
140
141 void rsnd_mod_init(struct rsnd_priv *priv,
142 struct rsnd_mod *mod,
143 struct rsnd_mod_ops *ops,
144 enum rsnd_mod_type type,
145 int id)
146 {
147 mod->priv = priv;
148 mod->id = id;
149 mod->ops = ops;
150 mod->type = type;
151 }
152
153 /*
154 * rsnd_dma functions
155 */
156 static void __rsnd_dma_start(struct rsnd_dma *dma);
157 static void rsnd_dma_continue(struct rsnd_dma *dma)
158 {
159 /* push next A or B plane */
160 dma->submit_loop = 1;
161 schedule_work(&dma->work);
162 }
163
164 void rsnd_dma_start(struct rsnd_dma *dma)
165 {
166 /* push both A and B plane*/
167 dma->offset = 0;
168 dma->submit_loop = 2;
169 __rsnd_dma_start(dma);
170 }
171
172 void rsnd_dma_stop(struct rsnd_dma *dma)
173 {
174 dma->submit_loop = 0;
175 cancel_work_sync(&dma->work);
176 dmaengine_terminate_all(dma->chan);
177 }
178
179 static void rsnd_dma_complete(void *data)
180 {
181 struct rsnd_dma *dma = (struct rsnd_dma *)data;
182 struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
183 struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
184 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
185 unsigned long flags;
186
187 rsnd_lock(priv, flags);
188
189 /*
190 * Renesas sound Gen1 needs 1 DMAC,
191 * Gen2 needs 2 DMAC.
192 * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
193 * But, Audio-DMAC-peri-peri doesn't have interrupt,
194 * and this driver is assuming that here.
195 *
196 * If Audio-DMAC-peri-peri has interrpt,
197 * rsnd_dai_pointer_update() will be called twice,
198 * ant it will breaks io->byte_pos
199 */
200 if (dma->submit_loop)
201 rsnd_dma_continue(dma);
202
203 rsnd_unlock(priv, flags);
204
205 rsnd_dai_pointer_update(io, io->byte_per_period);
206 }
207
208 static void __rsnd_dma_start(struct rsnd_dma *dma)
209 {
210 struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
211 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
212 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
213 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
214 struct device *dev = rsnd_priv_to_dev(priv);
215 struct dma_async_tx_descriptor *desc;
216 dma_addr_t buf;
217 size_t len = io->byte_per_period;
218 int i;
219
220 for (i = 0; i < dma->submit_loop; i++) {
221
222 buf = runtime->dma_addr +
223 rsnd_dai_pointer_offset(io, dma->offset + len);
224 dma->offset = len;
225
226 desc = dmaengine_prep_slave_single(
227 dma->chan, buf, len, dma->dir,
228 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
229 if (!desc) {
230 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
231 return;
232 }
233
234 desc->callback = rsnd_dma_complete;
235 desc->callback_param = dma;
236
237 if (dmaengine_submit(desc) < 0) {
238 dev_err(dev, "dmaengine_submit() fail\n");
239 return;
240 }
241
242 dma_async_issue_pending(dma->chan);
243 }
244 }
245
246 static void rsnd_dma_do_work(struct work_struct *work)
247 {
248 struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
249
250 __rsnd_dma_start(dma);
251 }
252
253 int rsnd_dma_available(struct rsnd_dma *dma)
254 {
255 return !!dma->chan;
256 }
257
258 #define DMA_NAME_SIZE 16
259 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
260 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
261 {
262 if (mod)
263 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
264 rsnd_mod_name(mod), rsnd_mod_id(mod));
265 else
266 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
267
268 }
269
270 static void rsnd_dma_of_name(struct rsnd_dma *dma,
271 int is_play, char *dma_name)
272 {
273 struct rsnd_mod *this = rsnd_dma_to_mod(dma);
274 struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
275 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
276 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
277 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
278 struct rsnd_mod *mod[MOD_MAX];
279 struct rsnd_mod *src_mod, *dst_mod;
280 int i, index;
281
282
283 for (i = 0; i < MOD_MAX; i++)
284 mod[i] = NULL;
285
286 /*
287 * in play case...
288 *
289 * src -> dst
290 *
291 * mem -> SSI
292 * mem -> SRC -> SSI
293 * mem -> SRC -> DVC -> SSI
294 */
295 mod[0] = NULL; /* for "mem" */
296 index = 1;
297 for (i = 1; i < MOD_MAX; i++) {
298 if (!src) {
299 mod[i] = ssi;
300 break;
301 } else if (!dvc) {
302 mod[i] = src;
303 src = NULL;
304 } else {
305 mod[i] = dvc;
306 dvc = NULL;
307 }
308
309 if (mod[i] == this)
310 index = i;
311 }
312
313 if (is_play) {
314 src_mod = mod[index - 1];
315 dst_mod = mod[index];
316 } else {
317 src_mod = mod[index];
318 dst_mod = mod[index + 1];
319 }
320
321 index = 0;
322 index = _rsnd_dma_of_name(dma_name + index, src_mod);
323 *(dma_name + index++) = '_';
324 index = _rsnd_dma_of_name(dma_name + index, dst_mod);
325 }
326
327 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
328 int is_play, int id)
329 {
330 struct device *dev = rsnd_priv_to_dev(priv);
331 struct dma_slave_config cfg;
332 char dma_name[DMA_NAME_SIZE];
333 dma_cap_mask_t mask;
334 int ret;
335
336 if (dma->chan) {
337 dev_err(dev, "it already has dma channel\n");
338 return -EIO;
339 }
340
341 dma_cap_zero(mask);
342 dma_cap_set(DMA_SLAVE, mask);
343
344 if (dev->of_node)
345 rsnd_dma_of_name(dma, is_play, dma_name);
346 else
347 snprintf(dma_name, DMA_NAME_SIZE,
348 is_play ? "tx" : "rx");
349
350 dev_dbg(dev, "dma name : %s\n", dma_name);
351
352 dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
353 (void *)id, dev,
354 dma_name);
355 if (!dma->chan) {
356 dev_err(dev, "can't get dma channel\n");
357 return -EIO;
358 }
359
360 rsnd_gen_dma_addr(priv, dma, &cfg, is_play, id);
361
362 ret = dmaengine_slave_config(dma->chan, &cfg);
363 if (ret < 0)
364 goto rsnd_dma_init_err;
365
366 dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
367 INIT_WORK(&dma->work, rsnd_dma_do_work);
368
369 return 0;
370
371 rsnd_dma_init_err:
372 rsnd_dma_quit(priv, dma);
373
374 return ret;
375 }
376
377 void rsnd_dma_quit(struct rsnd_priv *priv,
378 struct rsnd_dma *dma)
379 {
380 if (dma->chan)
381 dma_release_channel(dma->chan);
382
383 dma->chan = NULL;
384 }
385
386 /*
387 * settting function
388 */
389 u32 rsnd_get_adinr(struct rsnd_mod *mod)
390 {
391 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
392 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
393 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
394 struct device *dev = rsnd_priv_to_dev(priv);
395 u32 adinr = runtime->channels;
396
397 switch (runtime->sample_bits) {
398 case 16:
399 adinr |= (8 << 16);
400 break;
401 case 32:
402 adinr |= (0 << 16);
403 break;
404 default:
405 dev_warn(dev, "not supported sample bits\n");
406 return 0;
407 }
408
409 return adinr;
410 }
411
412 /*
413 * rsnd_dai functions
414 */
415 #define __rsnd_mod_call(mod, func, rdai...) \
416 ({ \
417 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); \
418 struct device *dev = rsnd_priv_to_dev(priv); \
419 dev_dbg(dev, "%s [%d] %s\n", \
420 rsnd_mod_name(mod), rsnd_mod_id(mod), #func); \
421 (mod)->ops->func(mod, rdai); \
422 })
423
424 #define rsnd_mod_call(mod, func, rdai...) \
425 (!(mod) ? -ENODEV : \
426 !((mod)->ops->func) ? 0 : \
427 __rsnd_mod_call(mod, func, rdai))
428
429 #define rsnd_dai_call(fn, io, rdai...) \
430 ({ \
431 struct rsnd_mod *mod; \
432 int ret = 0, i; \
433 for (i = 0; i < RSND_MOD_MAX; i++) { \
434 mod = (io)->mod[i]; \
435 if (!mod) \
436 continue; \
437 ret = rsnd_mod_call(mod, fn, rdai); \
438 if (ret < 0) \
439 break; \
440 } \
441 ret; \
442 })
443
444 static int rsnd_dai_connect(struct rsnd_mod *mod,
445 struct rsnd_dai_stream *io)
446 {
447 if (!mod)
448 return -EIO;
449
450 if (io->mod[mod->type]) {
451 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
452 struct device *dev = rsnd_priv_to_dev(priv);
453
454 dev_err(dev, "%s%d is not empty\n",
455 rsnd_mod_name(mod),
456 rsnd_mod_id(mod));
457 return -EIO;
458 }
459
460 io->mod[mod->type] = mod;
461 mod->io = io;
462
463 return 0;
464 }
465
466 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
467 {
468 int id = rdai - priv->rdai;
469
470 if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
471 return -EINVAL;
472
473 return id;
474 }
475
476 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
477 {
478 if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
479 return NULL;
480
481 return priv->rdai + id;
482 }
483
484 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
485 {
486 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
487
488 return rsnd_dai_get(priv, dai->id);
489 }
490
491 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
492 {
493 return &rdai->playback == io;
494 }
495
496 /*
497 * rsnd_soc_dai functions
498 */
499 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
500 {
501 struct snd_pcm_substream *substream = io->substream;
502 struct snd_pcm_runtime *runtime = substream->runtime;
503 int pos = io->byte_pos + additional;
504
505 pos %= (runtime->periods * io->byte_per_period);
506
507 return pos;
508 }
509
510 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
511 {
512 io->byte_pos += byte;
513
514 if (io->byte_pos >= io->next_period_byte) {
515 struct snd_pcm_substream *substream = io->substream;
516 struct snd_pcm_runtime *runtime = substream->runtime;
517
518 io->period_pos++;
519 io->next_period_byte += io->byte_per_period;
520
521 if (io->period_pos >= runtime->periods) {
522 io->byte_pos = 0;
523 io->period_pos = 0;
524 io->next_period_byte = io->byte_per_period;
525 }
526
527 snd_pcm_period_elapsed(substream);
528 }
529 }
530
531 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
532 struct snd_pcm_substream *substream)
533 {
534 struct snd_pcm_runtime *runtime = substream->runtime;
535
536 io->substream = substream;
537 io->byte_pos = 0;
538 io->period_pos = 0;
539 io->byte_per_period = runtime->period_size *
540 runtime->channels *
541 samples_to_bytes(runtime, 1);
542 io->next_period_byte = io->byte_per_period;
543
544 return 0;
545 }
546
547 static
548 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
549 {
550 struct snd_soc_pcm_runtime *rtd = substream->private_data;
551
552 return rtd->cpu_dai;
553 }
554
555 static
556 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
557 struct snd_pcm_substream *substream)
558 {
559 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
560 return &rdai->playback;
561 else
562 return &rdai->capture;
563 }
564
565 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
566 struct snd_soc_dai *dai)
567 {
568 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
569 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
570 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
571 int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
572 int ret;
573 unsigned long flags;
574
575 rsnd_lock(priv, flags);
576
577 switch (cmd) {
578 case SNDRV_PCM_TRIGGER_START:
579 ret = rsnd_dai_stream_init(io, substream);
580 if (ret < 0)
581 goto dai_trigger_end;
582
583 ret = rsnd_platform_call(priv, dai, start, ssi_id);
584 if (ret < 0)
585 goto dai_trigger_end;
586
587 ret = rsnd_dai_call(init, io, rdai);
588 if (ret < 0)
589 goto dai_trigger_end;
590
591 ret = rsnd_dai_call(start, io, rdai);
592 if (ret < 0)
593 goto dai_trigger_end;
594 break;
595 case SNDRV_PCM_TRIGGER_STOP:
596 ret = rsnd_dai_call(stop, io, rdai);
597 if (ret < 0)
598 goto dai_trigger_end;
599
600 ret = rsnd_dai_call(quit, io, rdai);
601 if (ret < 0)
602 goto dai_trigger_end;
603
604 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
605 if (ret < 0)
606 goto dai_trigger_end;
607 break;
608 default:
609 ret = -EINVAL;
610 }
611
612 dai_trigger_end:
613 rsnd_unlock(priv, flags);
614
615 return ret;
616 }
617
618 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
619 {
620 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
621
622 /* set master/slave audio interface */
623 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
624 case SND_SOC_DAIFMT_CBM_CFM:
625 rdai->clk_master = 0;
626 break;
627 case SND_SOC_DAIFMT_CBS_CFS:
628 rdai->clk_master = 1; /* codec is slave, cpu is master */
629 break;
630 default:
631 return -EINVAL;
632 }
633
634 /* set clock inversion */
635 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
636 case SND_SOC_DAIFMT_NB_IF:
637 rdai->bit_clk_inv = 0;
638 rdai->frm_clk_inv = 1;
639 break;
640 case SND_SOC_DAIFMT_IB_NF:
641 rdai->bit_clk_inv = 1;
642 rdai->frm_clk_inv = 0;
643 break;
644 case SND_SOC_DAIFMT_IB_IF:
645 rdai->bit_clk_inv = 1;
646 rdai->frm_clk_inv = 1;
647 break;
648 case SND_SOC_DAIFMT_NB_NF:
649 default:
650 rdai->bit_clk_inv = 0;
651 rdai->frm_clk_inv = 0;
652 break;
653 }
654
655 /* set format */
656 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
657 case SND_SOC_DAIFMT_I2S:
658 rdai->sys_delay = 0;
659 rdai->data_alignment = 0;
660 break;
661 case SND_SOC_DAIFMT_LEFT_J:
662 rdai->sys_delay = 1;
663 rdai->data_alignment = 0;
664 break;
665 case SND_SOC_DAIFMT_RIGHT_J:
666 rdai->sys_delay = 1;
667 rdai->data_alignment = 1;
668 break;
669 }
670
671 return 0;
672 }
673
674 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
675 .trigger = rsnd_soc_dai_trigger,
676 .set_fmt = rsnd_soc_dai_set_fmt,
677 };
678
679 #define rsnd_path_parse(priv, io, type) \
680 ({ \
681 struct rsnd_mod *mod; \
682 int ret = 0; \
683 int id = -1; \
684 \
685 if (rsnd_is_enable_path(io, type)) { \
686 id = rsnd_info_id(priv, io, type); \
687 if (id >= 0) { \
688 mod = rsnd_##type##_mod_get(priv, id); \
689 ret = rsnd_dai_connect(mod, io); \
690 } \
691 } \
692 ret; \
693 })
694
695 static int rsnd_path_init(struct rsnd_priv *priv,
696 struct rsnd_dai *rdai,
697 struct rsnd_dai_stream *io)
698 {
699 int ret;
700
701 /*
702 * Gen1 is created by SRU/SSI, and this SRU is base module of
703 * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
704 *
705 * Easy image is..
706 * Gen1 SRU = Gen2 SCU + SSIU + etc
707 *
708 * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
709 * using fixed path.
710 */
711
712 /* SRC */
713 ret = rsnd_path_parse(priv, io, src);
714 if (ret < 0)
715 return ret;
716
717 /* SSI */
718 ret = rsnd_path_parse(priv, io, ssi);
719 if (ret < 0)
720 return ret;
721
722 /* DVC */
723 ret = rsnd_path_parse(priv, io, dvc);
724 if (ret < 0)
725 return ret;
726
727 return ret;
728 }
729
730 static void rsnd_of_parse_dai(struct platform_device *pdev,
731 const struct rsnd_of_data *of_data,
732 struct rsnd_priv *priv)
733 {
734 struct device_node *dai_node, *dai_np;
735 struct device_node *ssi_node, *ssi_np;
736 struct device_node *src_node, *src_np;
737 struct device_node *playback, *capture;
738 struct rsnd_dai_platform_info *dai_info;
739 struct rcar_snd_info *info = rsnd_priv_to_info(priv);
740 struct device *dev = &pdev->dev;
741 int nr, i;
742 int dai_i, ssi_i, src_i;
743
744 if (!of_data)
745 return;
746
747 dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
748 if (!dai_node)
749 return;
750
751 nr = of_get_child_count(dai_node);
752 if (!nr)
753 return;
754
755 dai_info = devm_kzalloc(dev,
756 sizeof(struct rsnd_dai_platform_info) * nr,
757 GFP_KERNEL);
758 if (!dai_info) {
759 dev_err(dev, "dai info allocation error\n");
760 return;
761 }
762
763 info->dai_info_nr = nr;
764 info->dai_info = dai_info;
765
766 ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
767 src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
768
769 #define mod_parse(name) \
770 if (name##_node) { \
771 struct rsnd_##name##_platform_info *name##_info; \
772 \
773 name##_i = 0; \
774 for_each_child_of_node(name##_node, name##_np) { \
775 name##_info = info->name##_info + name##_i; \
776 \
777 if (name##_np == playback) \
778 dai_info->playback.name = name##_info; \
779 if (name##_np == capture) \
780 dai_info->capture.name = name##_info; \
781 \
782 name##_i++; \
783 } \
784 }
785
786 /*
787 * parse all dai
788 */
789 dai_i = 0;
790 for_each_child_of_node(dai_node, dai_np) {
791 dai_info = info->dai_info + dai_i;
792
793 for (i = 0;; i++) {
794
795 playback = of_parse_phandle(dai_np, "playback", i);
796 capture = of_parse_phandle(dai_np, "capture", i);
797
798 if (!playback && !capture)
799 break;
800
801 mod_parse(ssi);
802 mod_parse(src);
803
804 if (playback)
805 of_node_put(playback);
806 if (capture)
807 of_node_put(capture);
808 }
809
810 dai_i++;
811 }
812 }
813
814 static int rsnd_dai_probe(struct platform_device *pdev,
815 const struct rsnd_of_data *of_data,
816 struct rsnd_priv *priv)
817 {
818 struct snd_soc_dai_driver *drv;
819 struct rcar_snd_info *info = rsnd_priv_to_info(priv);
820 struct rsnd_dai *rdai;
821 struct rsnd_ssi_platform_info *pmod, *cmod;
822 struct device *dev = rsnd_priv_to_dev(priv);
823 int dai_nr;
824 int i;
825
826 rsnd_of_parse_dai(pdev, of_data, priv);
827
828 dai_nr = info->dai_info_nr;
829 if (!dai_nr) {
830 dev_err(dev, "no dai\n");
831 return -EIO;
832 }
833
834 drv = devm_kzalloc(dev, sizeof(*drv) * dai_nr, GFP_KERNEL);
835 rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
836 if (!drv || !rdai) {
837 dev_err(dev, "dai allocate failed\n");
838 return -ENOMEM;
839 }
840
841 priv->rdai_nr = dai_nr;
842 priv->daidrv = drv;
843 priv->rdai = rdai;
844
845 for (i = 0; i < dai_nr; i++) {
846 rdai[i].info = &info->dai_info[i];
847
848 pmod = rdai[i].info->playback.ssi;
849 cmod = rdai[i].info->capture.ssi;
850
851 /*
852 * init rsnd_dai
853 */
854 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
855
856 /*
857 * init snd_soc_dai_driver
858 */
859 drv[i].name = rdai[i].name;
860 drv[i].ops = &rsnd_soc_dai_ops;
861 if (pmod) {
862 drv[i].playback.rates = RSND_RATES;
863 drv[i].playback.formats = RSND_FMTS;
864 drv[i].playback.channels_min = 2;
865 drv[i].playback.channels_max = 2;
866
867 rdai[i].playback.info = &info->dai_info[i].playback;
868 rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
869 }
870 if (cmod) {
871 drv[i].capture.rates = RSND_RATES;
872 drv[i].capture.formats = RSND_FMTS;
873 drv[i].capture.channels_min = 2;
874 drv[i].capture.channels_max = 2;
875
876 rdai[i].capture.info = &info->dai_info[i].capture;
877 rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
878 }
879
880 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
881 pmod ? "play" : " -- ",
882 cmod ? "capture" : " -- ");
883 }
884
885 return 0;
886 }
887
888 /*
889 * pcm ops
890 */
891 static struct snd_pcm_hardware rsnd_pcm_hardware = {
892 .info = SNDRV_PCM_INFO_INTERLEAVED |
893 SNDRV_PCM_INFO_MMAP |
894 SNDRV_PCM_INFO_MMAP_VALID |
895 SNDRV_PCM_INFO_PAUSE,
896 .buffer_bytes_max = 64 * 1024,
897 .period_bytes_min = 32,
898 .period_bytes_max = 8192,
899 .periods_min = 1,
900 .periods_max = 32,
901 .fifo_size = 256,
902 };
903
904 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
905 {
906 struct snd_pcm_runtime *runtime = substream->runtime;
907 int ret = 0;
908
909 snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
910
911 ret = snd_pcm_hw_constraint_integer(runtime,
912 SNDRV_PCM_HW_PARAM_PERIODS);
913
914 return ret;
915 }
916
917 static int rsnd_hw_params(struct snd_pcm_substream *substream,
918 struct snd_pcm_hw_params *hw_params)
919 {
920 return snd_pcm_lib_malloc_pages(substream,
921 params_buffer_bytes(hw_params));
922 }
923
924 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
925 {
926 struct snd_pcm_runtime *runtime = substream->runtime;
927 struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
928 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
929 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
930
931 return bytes_to_frames(runtime, io->byte_pos);
932 }
933
934 static struct snd_pcm_ops rsnd_pcm_ops = {
935 .open = rsnd_pcm_open,
936 .ioctl = snd_pcm_lib_ioctl,
937 .hw_params = rsnd_hw_params,
938 .hw_free = snd_pcm_lib_free_pages,
939 .pointer = rsnd_pointer,
940 };
941
942 /*
943 * snd_soc_platform
944 */
945
946 #define PREALLOC_BUFFER (32 * 1024)
947 #define PREALLOC_BUFFER_MAX (32 * 1024)
948
949 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
950 {
951 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(rtd->cpu_dai);
952 struct rsnd_dai *rdai;
953 int i, ret;
954
955 for_each_rsnd_dai(rdai, priv, i) {
956 ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
957 if (ret)
958 return ret;
959
960 ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
961 if (ret)
962 return ret;
963 }
964
965 return snd_pcm_lib_preallocate_pages_for_all(
966 rtd->pcm,
967 SNDRV_DMA_TYPE_DEV,
968 rtd->card->snd_card->dev,
969 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
970 }
971
972 static void rsnd_pcm_free(struct snd_pcm *pcm)
973 {
974 snd_pcm_lib_preallocate_free_for_all(pcm);
975 }
976
977 static struct snd_soc_platform_driver rsnd_soc_platform = {
978 .ops = &rsnd_pcm_ops,
979 .pcm_new = rsnd_pcm_new,
980 .pcm_free = rsnd_pcm_free,
981 };
982
983 static const struct snd_soc_component_driver rsnd_soc_component = {
984 .name = "rsnd",
985 };
986
987 /*
988 * rsnd probe
989 */
990 static int rsnd_probe(struct platform_device *pdev)
991 {
992 struct rcar_snd_info *info;
993 struct rsnd_priv *priv;
994 struct device *dev = &pdev->dev;
995 struct rsnd_dai *rdai;
996 const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
997 const struct rsnd_of_data *of_data;
998 int (*probe_func[])(struct platform_device *pdev,
999 const struct rsnd_of_data *of_data,
1000 struct rsnd_priv *priv) = {
1001 rsnd_gen_probe,
1002 rsnd_ssi_probe,
1003 rsnd_src_probe,
1004 rsnd_dvc_probe,
1005 rsnd_adg_probe,
1006 rsnd_dai_probe,
1007 };
1008 int ret, i;
1009
1010 info = NULL;
1011 of_data = NULL;
1012 if (of_id) {
1013 info = devm_kzalloc(&pdev->dev,
1014 sizeof(struct rcar_snd_info), GFP_KERNEL);
1015 of_data = of_id->data;
1016 } else {
1017 info = pdev->dev.platform_data;
1018 }
1019
1020 if (!info) {
1021 dev_err(dev, "driver needs R-Car sound information\n");
1022 return -ENODEV;
1023 }
1024
1025 /*
1026 * init priv data
1027 */
1028 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1029 if (!priv) {
1030 dev_err(dev, "priv allocate failed\n");
1031 return -ENODEV;
1032 }
1033
1034 priv->pdev = pdev;
1035 priv->info = info;
1036 spin_lock_init(&priv->lock);
1037
1038 /*
1039 * init each module
1040 */
1041 for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1042 ret = probe_func[i](pdev, of_data, priv);
1043 if (ret)
1044 return ret;
1045 }
1046
1047 for_each_rsnd_dai(rdai, priv, i) {
1048 ret = rsnd_dai_call(probe, &rdai->playback, rdai);
1049 if (ret)
1050 return ret;
1051
1052 ret = rsnd_dai_call(probe, &rdai->capture, rdai);
1053 if (ret)
1054 return ret;
1055 }
1056
1057 /*
1058 * asoc register
1059 */
1060 ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1061 if (ret < 0) {
1062 dev_err(dev, "cannot snd soc register\n");
1063 return ret;
1064 }
1065
1066 ret = snd_soc_register_component(dev, &rsnd_soc_component,
1067 priv->daidrv, rsnd_rdai_nr(priv));
1068 if (ret < 0) {
1069 dev_err(dev, "cannot snd dai register\n");
1070 goto exit_snd_soc;
1071 }
1072
1073 dev_set_drvdata(dev, priv);
1074
1075 pm_runtime_enable(dev);
1076
1077 dev_info(dev, "probed\n");
1078 return ret;
1079
1080 exit_snd_soc:
1081 snd_soc_unregister_platform(dev);
1082
1083 return ret;
1084 }
1085
1086 static int rsnd_remove(struct platform_device *pdev)
1087 {
1088 struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1089 struct rsnd_dai *rdai;
1090 int ret, i;
1091
1092 pm_runtime_disable(&pdev->dev);
1093
1094 for_each_rsnd_dai(rdai, priv, i) {
1095 ret = rsnd_dai_call(remove, &rdai->playback, rdai);
1096 if (ret)
1097 return ret;
1098
1099 ret = rsnd_dai_call(remove, &rdai->capture, rdai);
1100 if (ret)
1101 return ret;
1102 }
1103
1104 return 0;
1105 }
1106
1107 static struct platform_driver rsnd_driver = {
1108 .driver = {
1109 .name = "rcar_sound",
1110 .of_match_table = rsnd_of_match,
1111 },
1112 .probe = rsnd_probe,
1113 .remove = rsnd_remove,
1114 };
1115 module_platform_driver(rsnd_driver);
1116
1117 MODULE_LICENSE("GPL");
1118 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1119 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1120 MODULE_ALIAS("platform:rcar-pcm-audio");
Linux kernel - Deliverables
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