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TOMOYO Linux Cross Reference
Linux/sound/soc/sh/rcar/core.c

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  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 "rsnd.h"
 98 
 99 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
100 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
101 
102 static const struct rsnd_of_data rsnd_of_data_gen1 = {
103         .flags = RSND_GEN1,
104 };
105 
106 static const struct rsnd_of_data rsnd_of_data_gen2 = {
107         .flags = RSND_GEN2,
108 };
109 
110 static const struct of_device_id rsnd_of_match[] = {
111         { .compatible = "renesas,rcar_sound-gen1", .data = &rsnd_of_data_gen1 },
112         { .compatible = "renesas,rcar_sound-gen2", .data = &rsnd_of_data_gen2 },
113         {},
114 };
115 MODULE_DEVICE_TABLE(of, rsnd_of_match);
116 
117 /*
118  *      rsnd_platform functions
119  */
120 #define rsnd_platform_call(priv, dai, func, param...)   \
121         (!(priv->info->func) ? 0 :              \
122          priv->info->func(param))
123 
124 #define rsnd_is_enable_path(io, name) \
125         ((io)->info ? (io)->info->name : NULL)
126 #define rsnd_info_id(priv, io, name) \
127         ((io)->info->name - priv->info->name##_info)
128 
129 /*
130  *      rsnd_mod functions
131  */
132 char *rsnd_mod_name(struct rsnd_mod *mod)
133 {
134         if (!mod || !mod->ops)
135                 return "unknown";
136 
137         return mod->ops->name;
138 }
139 
140 struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
141                                   struct rsnd_mod *mod)
142 {
143         if (!mod || !mod->ops || !mod->ops->dma_req)
144                 return NULL;
145 
146         return mod->ops->dma_req(io, mod);
147 }
148 
149 int rsnd_mod_init(struct rsnd_priv *priv,
150                   struct rsnd_mod *mod,
151                    struct rsnd_mod_ops *ops,
152                    struct clk *clk,
153                    enum rsnd_mod_type type,
154                    int id)
155 {
156         int ret = clk_prepare(clk);
157 
158         if (ret)
159                 return ret;
160 
161         mod->id         = id;
162         mod->ops        = ops;
163         mod->type       = type;
164         mod->clk        = clk;
165         mod->priv       = priv;
166 
167         return ret;
168 }
169 
170 void rsnd_mod_quit(struct rsnd_mod *mod)
171 {
172         if (mod->clk)
173                 clk_unprepare(mod->clk);
174 }
175 
176 void rsnd_mod_interrupt(struct rsnd_mod *mod,
177                         void (*callback)(struct rsnd_mod *mod,
178                                          struct rsnd_dai_stream *io))
179 {
180         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
181         struct rsnd_dai_stream *io;
182         struct rsnd_dai *rdai;
183         int i, j;
184 
185         for_each_rsnd_dai(rdai, priv, j) {
186 
187                 for (i = 0; i < RSND_MOD_MAX; i++) {
188                         io = &rdai->playback;
189                         if (mod == io->mod[i])
190                                 callback(mod, io);
191 
192                         io = &rdai->capture;
193                         if (mod == io->mod[i])
194                                 callback(mod, io);
195                 }
196         }
197 }
198 
199 int rsnd_io_is_working(struct rsnd_dai_stream *io)
200 {
201         /* see rsnd_dai_stream_init/quit() */
202         return !!io->substream;
203 }
204 
205 /*
206  *      ADINR function
207  */
208 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
209 {
210         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
211         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
212         struct device *dev = rsnd_priv_to_dev(priv);
213         u32 adinr = runtime->channels;
214 
215         switch (runtime->sample_bits) {
216         case 16:
217                 adinr |= (8 << 16);
218                 break;
219         case 32:
220                 adinr |= (0 << 16);
221                 break;
222         default:
223                 dev_warn(dev, "not supported sample bits\n");
224                 return 0;
225         }
226 
227         return adinr;
228 }
229 
230 u32 rsnd_get_adinr_chan(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
231 {
232         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
233         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
234         struct device *dev = rsnd_priv_to_dev(priv);
235         u32 chan = runtime->channels;
236 
237         switch (chan) {
238         case 1:
239         case 2:
240         case 4:
241         case 6:
242         case 8:
243                 break;
244         default:
245                 dev_warn(dev, "not supported channel\n");
246                 chan = 0;
247                 break;
248         }
249 
250         return chan;
251 }
252 
253 /*
254  *      DALIGN function
255  */
256 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
257 {
258         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
259         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
260         struct rsnd_mod *target = src ? src : ssi;
261         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
262         u32 val = 0x76543210;
263         u32 mask = ~0;
264 
265         mask <<= runtime->channels * 4;
266         val = val & mask;
267 
268         switch (runtime->sample_bits) {
269         case 16:
270                 val |= 0x67452301 & ~mask;
271                 break;
272         case 32:
273                 val |= 0x76543210 & ~mask;
274                 break;
275         }
276 
277         /*
278          * exchange channeles on SRC if possible,
279          * otherwise, R/L volume settings on DVC
280          * changes inverted channels
281          */
282         if (mod == target)
283                 return val;
284         else
285                 return 0x76543210;
286 }
287 
288 /*
289  *      rsnd_dai functions
290  */
291 #define __rsnd_mod_call(mod, io, func, param...)                \
292 ({                                                              \
293         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
294         struct device *dev = rsnd_priv_to_dev(priv);            \
295         u32 mask = 0xF << __rsnd_mod_shift_##func;                      \
296         u8 val  = (mod->status >> __rsnd_mod_shift_##func) & 0xF;       \
297         u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);                \
298         int ret = 0;                                                    \
299         int called = 0;                                                 \
300         if (val == __rsnd_mod_call_##func) {                            \
301                 called = 1;                                             \
302                 ret = (mod)->ops->func(mod, io, param);                 \
303         }                                                               \
304         mod->status = (mod->status & ~mask) +                           \
305                 (add << __rsnd_mod_shift_##func);                       \
306         dev_dbg(dev, "%s[%d] 0x%08x %s\n",                              \
307                 rsnd_mod_name(mod), rsnd_mod_id(mod), mod->status,      \
308                 called ? #func : "");                                   \
309         ret;                                                            \
310 })
311 
312 #define rsnd_mod_call(mod, io, func, param...)  \
313         (!(mod) ? -ENODEV :                     \
314          !((mod)->ops->func) ? 0 :              \
315          __rsnd_mod_call(mod, io, func, param))
316 
317 #define rsnd_dai_call(fn, io, param...)                         \
318 ({                                                              \
319         struct rsnd_mod *mod;                                   \
320         int ret = 0, i;                                         \
321         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
322                 mod = (io)->mod[i];                             \
323                 if (!mod)                                       \
324                         continue;                               \
325                 ret = rsnd_mod_call(mod, io, fn, param);        \
326                 if (ret < 0)                                    \
327                         break;                                  \
328         }                                                       \
329         ret;                                                    \
330 })
331 
332 static int rsnd_dai_connect(struct rsnd_mod *mod,
333                             struct rsnd_dai_stream *io)
334 {
335         struct rsnd_priv *priv;
336         struct device *dev;
337 
338         if (!mod)
339                 return -EIO;
340 
341         priv = rsnd_mod_to_priv(mod);
342         dev = rsnd_priv_to_dev(priv);
343 
344         io->mod[mod->type] = mod;
345 
346         dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
347                 rsnd_mod_name(mod), rsnd_mod_id(mod),
348                 rsnd_io_is_play(io) ? "Playback" : "Capture");
349 
350         return 0;
351 }
352 
353 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
354                                 struct rsnd_dai_stream *io)
355 {
356         io->mod[mod->type] = NULL;
357 }
358 
359 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
360 {
361         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
362                 return NULL;
363 
364         return priv->rdai + id;
365 }
366 
367 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
368 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
369 {
370         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
371 
372         return rsnd_rdai_get(priv, dai->id);
373 }
374 
375 /*
376  *      rsnd_soc_dai functions
377  */
378 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
379 {
380         struct snd_pcm_substream *substream = io->substream;
381         struct snd_pcm_runtime *runtime = substream->runtime;
382         int pos = io->byte_pos + additional;
383 
384         pos %= (runtime->periods * io->byte_per_period);
385 
386         return pos;
387 }
388 
389 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
390 {
391         io->byte_pos += byte;
392 
393         if (io->byte_pos >= io->next_period_byte) {
394                 struct snd_pcm_substream *substream = io->substream;
395                 struct snd_pcm_runtime *runtime = substream->runtime;
396 
397                 io->period_pos++;
398                 io->next_period_byte += io->byte_per_period;
399 
400                 if (io->period_pos >= runtime->periods) {
401                         io->byte_pos = 0;
402                         io->period_pos = 0;
403                         io->next_period_byte = io->byte_per_period;
404                 }
405 
406                 return true;
407         }
408 
409         return false;
410 }
411 
412 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
413 {
414         struct snd_pcm_substream *substream = io->substream;
415 
416         /*
417          * this function should be called...
418          *
419          * - if rsnd_dai_pointer_update() returns true
420          * - without spin lock
421          */
422 
423         snd_pcm_period_elapsed(substream);
424 }
425 
426 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
427                                 struct snd_pcm_substream *substream)
428 {
429         struct snd_pcm_runtime *runtime = substream->runtime;
430 
431         io->substream           = substream;
432         io->byte_pos            = 0;
433         io->period_pos          = 0;
434         io->byte_per_period     = runtime->period_size *
435                                   runtime->channels *
436                                   samples_to_bytes(runtime, 1);
437         io->next_period_byte    = io->byte_per_period;
438 }
439 
440 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
441 {
442         io->substream           = NULL;
443 }
444 
445 static
446 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
447 {
448         struct snd_soc_pcm_runtime *rtd = substream->private_data;
449 
450         return  rtd->cpu_dai;
451 }
452 
453 static
454 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
455                                         struct snd_pcm_substream *substream)
456 {
457         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
458                 return &rdai->playback;
459         else
460                 return &rdai->capture;
461 }
462 
463 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
464                             struct snd_soc_dai *dai)
465 {
466         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
467         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
468         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
469         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
470         int ret;
471         unsigned long flags;
472 
473         spin_lock_irqsave(&priv->lock, flags);
474 
475         switch (cmd) {
476         case SNDRV_PCM_TRIGGER_START:
477                 rsnd_dai_stream_init(io, substream);
478 
479                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
480                 if (ret < 0)
481                         goto dai_trigger_end;
482 
483                 ret = rsnd_dai_call(init, io, priv);
484                 if (ret < 0)
485                         goto dai_trigger_end;
486 
487                 ret = rsnd_dai_call(start, io, priv);
488                 if (ret < 0)
489                         goto dai_trigger_end;
490                 break;
491         case SNDRV_PCM_TRIGGER_STOP:
492                 ret = rsnd_dai_call(stop, io, priv);
493                 if (ret < 0)
494                         goto dai_trigger_end;
495 
496                 ret = rsnd_dai_call(quit, io, priv);
497                 if (ret < 0)
498                         goto dai_trigger_end;
499 
500                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
501                 if (ret < 0)
502                         goto dai_trigger_end;
503 
504                 rsnd_dai_stream_quit(io);
505                 break;
506         default:
507                 ret = -EINVAL;
508         }
509 
510 dai_trigger_end:
511         spin_unlock_irqrestore(&priv->lock, flags);
512 
513         return ret;
514 }
515 
516 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
517 {
518         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
519 
520         /* set master/slave audio interface */
521         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
522         case SND_SOC_DAIFMT_CBM_CFM:
523                 rdai->clk_master = 0;
524                 break;
525         case SND_SOC_DAIFMT_CBS_CFS:
526                 rdai->clk_master = 1; /* codec is slave, cpu is master */
527                 break;
528         default:
529                 return -EINVAL;
530         }
531 
532         /* set format */
533         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
534         case SND_SOC_DAIFMT_I2S:
535                 rdai->sys_delay = 0;
536                 rdai->data_alignment = 0;
537                 rdai->frm_clk_inv = 0;
538                 break;
539         case SND_SOC_DAIFMT_LEFT_J:
540                 rdai->sys_delay = 1;
541                 rdai->data_alignment = 0;
542                 rdai->frm_clk_inv = 1;
543                 break;
544         case SND_SOC_DAIFMT_RIGHT_J:
545                 rdai->sys_delay = 1;
546                 rdai->data_alignment = 1;
547                 rdai->frm_clk_inv = 1;
548                 break;
549         }
550 
551         /* set clock inversion */
552         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
553         case SND_SOC_DAIFMT_NB_IF:
554                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
555                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
556                 break;
557         case SND_SOC_DAIFMT_IB_NF:
558                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
559                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
560                 break;
561         case SND_SOC_DAIFMT_IB_IF:
562                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
563                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
564                 break;
565         case SND_SOC_DAIFMT_NB_NF:
566         default:
567                 break;
568         }
569 
570         return 0;
571 }
572 
573 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
574         .trigger        = rsnd_soc_dai_trigger,
575         .set_fmt        = rsnd_soc_dai_set_fmt,
576 };
577 
578 #define rsnd_path_add(priv, io, type)                           \
579 ({                                                              \
580         struct rsnd_mod *mod;                                   \
581         int ret = 0;                                            \
582         int id = -1;                                            \
583                                                                 \
584         if (rsnd_is_enable_path(io, type)) {                    \
585                 id = rsnd_info_id(priv, io, type);              \
586                 if (id >= 0) {                                  \
587                         mod = rsnd_##type##_mod_get(priv, id);  \
588                         ret = rsnd_dai_connect(mod, io);        \
589                 }                                               \
590         }                                                       \
591         ret;                                                    \
592 })
593 
594 #define rsnd_path_remove(priv, io, type)                        \
595 {                                                               \
596         struct rsnd_mod *mod;                                   \
597         int id = -1;                                            \
598                                                                 \
599         if (rsnd_is_enable_path(io, type)) {                    \
600                 id = rsnd_info_id(priv, io, type);              \
601                 if (id >= 0) {                                  \
602                         mod = rsnd_##type##_mod_get(priv, id);  \
603                         rsnd_dai_disconnect(mod, io);           \
604                 }                                               \
605         }                                                       \
606 }
607 
608 void rsnd_path_parse(struct rsnd_priv *priv,
609                      struct rsnd_dai_stream *io)
610 {
611         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
612         struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
613         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
614         struct rsnd_mod *cmd;
615         struct device *dev = rsnd_priv_to_dev(priv);
616         u32 data;
617 
618         /* Gen1 is not supported */
619         if (rsnd_is_gen1(priv))
620                 return;
621 
622         if (!mix && !dvc)
623                 return;
624 
625         if (mix) {
626                 struct rsnd_dai *rdai;
627                 int i;
628                 u32 path[] = {
629                         [0] = 0,
630                         [1] = 1 << 0,
631                         [2] = 0,
632                         [3] = 0,
633                         [4] = 0,
634                         [5] = 1 << 8
635                 };
636 
637                 /*
638                  * it is assuming that integrater is well understanding about
639                  * data path. Here doesn't check impossible connection,
640                  * like src2 + src5
641                  */
642                 data = 0;
643                 for_each_rsnd_dai(rdai, priv, i) {
644                         io = &rdai->playback;
645                         if (mix == rsnd_io_to_mod_mix(io))
646                                 data |= path[rsnd_mod_id(src)];
647 
648                         io = &rdai->capture;
649                         if (mix == rsnd_io_to_mod_mix(io))
650                                 data |= path[rsnd_mod_id(src)];
651                 }
652 
653                 /*
654                  * We can't use ctu = rsnd_io_ctu() here.
655                  * Since, ID of dvc/mix are 0 or 1 (= same as CMD number)
656                  * but ctu IDs are 0 - 7 (= CTU00 - CTU13)
657                  */
658                 cmd = mix;
659         } else {
660                 u32 path[] = {
661                         [0] = 0x30000,
662                         [1] = 0x30001,
663                         [2] = 0x40000,
664                         [3] = 0x10000,
665                         [4] = 0x20000,
666                         [5] = 0x40100
667                 };
668 
669                 data = path[rsnd_mod_id(src)];
670 
671                 cmd = dvc;
672         }
673 
674         dev_dbg(dev, "ctu/mix path = 0x%08x", data);
675 
676         rsnd_mod_write(cmd, CMD_ROUTE_SLCT, data);
677 
678         rsnd_mod_write(cmd, CMD_CTRL, 0x10);
679 }
680 
681 static int rsnd_path_init(struct rsnd_priv *priv,
682                           struct rsnd_dai *rdai,
683                           struct rsnd_dai_stream *io)
684 {
685         int ret;
686 
687         /*
688          * Gen1 is created by SRU/SSI, and this SRU is base module of
689          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
690          *
691          * Easy image is..
692          *      Gen1 SRU = Gen2 SCU + SSIU + etc
693          *
694          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
695          * using fixed path.
696          */
697 
698         /* SSI */
699         ret = rsnd_path_add(priv, io, ssi);
700         if (ret < 0)
701                 return ret;
702 
703         /* SRC */
704         ret = rsnd_path_add(priv, io, src);
705         if (ret < 0)
706                 return ret;
707 
708         /* CTU */
709         ret = rsnd_path_add(priv, io, ctu);
710         if (ret < 0)
711                 return ret;
712 
713         /* MIX */
714         ret = rsnd_path_add(priv, io, mix);
715         if (ret < 0)
716                 return ret;
717 
718         /* DVC */
719         ret = rsnd_path_add(priv, io, dvc);
720         if (ret < 0)
721                 return ret;
722 
723         return ret;
724 }
725 
726 static void rsnd_of_parse_dai(struct platform_device *pdev,
727                               const struct rsnd_of_data *of_data,
728                               struct rsnd_priv *priv)
729 {
730         struct device_node *dai_node,   *dai_np;
731         struct device_node *ssi_node,   *ssi_np;
732         struct device_node *src_node,   *src_np;
733         struct device_node *ctu_node,   *ctu_np;
734         struct device_node *mix_node,   *mix_np;
735         struct device_node *dvc_node,   *dvc_np;
736         struct device_node *playback, *capture;
737         struct rsnd_dai_platform_info *dai_info;
738         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
739         struct device *dev = &pdev->dev;
740         int nr, i;
741         int dai_i, ssi_i, src_i, ctu_i, mix_i, dvc_i;
742 
743         if (!of_data)
744                 return;
745 
746         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
747         if (!dai_node)
748                 return;
749 
750         nr = of_get_child_count(dai_node);
751         if (!nr)
752                 return;
753 
754         dai_info = devm_kzalloc(dev,
755                                 sizeof(struct rsnd_dai_platform_info) * nr,
756                                 GFP_KERNEL);
757         if (!dai_info) {
758                 dev_err(dev, "dai info allocation error\n");
759                 return;
760         }
761 
762         info->dai_info_nr       = nr;
763         info->dai_info          = dai_info;
764 
765         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
766         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
767         ctu_node = of_get_child_by_name(dev->of_node, "rcar_sound,ctu");
768         mix_node = of_get_child_by_name(dev->of_node, "rcar_sound,mix");
769         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
770 
771 #define mod_parse(name)                                                 \
772 if (name##_node) {                                                      \
773         struct rsnd_##name##_platform_info *name##_info;                \
774                                                                         \
775         name##_i = 0;                                                   \
776         for_each_child_of_node(name##_node, name##_np) {                \
777                 name##_info = info->name##_info + name##_i;             \
778                                                                         \
779                 if (name##_np == playback)                              \
780                         dai_info->playback.name = name##_info;          \
781                 if (name##_np == capture)                               \
782                         dai_info->capture.name = name##_info;           \
783                                                                         \
784                 name##_i++;                                             \
785         }                                                               \
786 }
787 
788         /*
789          * parse all dai
790          */
791         dai_i = 0;
792         for_each_child_of_node(dai_node, dai_np) {
793                 dai_info = info->dai_info + dai_i;
794 
795                 for (i = 0;; i++) {
796 
797                         playback = of_parse_phandle(dai_np, "playback", i);
798                         capture  = of_parse_phandle(dai_np, "capture", i);
799 
800                         if (!playback && !capture)
801                                 break;
802 
803                         mod_parse(ssi);
804                         mod_parse(src);
805                         mod_parse(ctu);
806                         mod_parse(mix);
807                         mod_parse(dvc);
808 
809                         of_node_put(playback);
810                         of_node_put(capture);
811                 }
812 
813                 dai_i++;
814         }
815 }
816 
817 static int rsnd_dai_probe(struct platform_device *pdev,
818                           const struct rsnd_of_data *of_data,
819                           struct rsnd_priv *priv)
820 {
821         struct snd_soc_dai_driver *drv;
822         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
823         struct rsnd_dai *rdai;
824         struct rsnd_ssi_platform_info *pmod, *cmod;
825         struct device *dev = rsnd_priv_to_dev(priv);
826         int dai_nr;
827         int i;
828 
829         rsnd_of_parse_dai(pdev, of_data, priv);
830 
831         dai_nr = info->dai_info_nr;
832         if (!dai_nr) {
833                 dev_err(dev, "no dai\n");
834                 return -EIO;
835         }
836 
837         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
838         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
839         if (!drv || !rdai) {
840                 dev_err(dev, "dai allocate failed\n");
841                 return -ENOMEM;
842         }
843 
844         priv->rdai_nr   = dai_nr;
845         priv->daidrv    = drv;
846         priv->rdai      = rdai;
847 
848         for (i = 0; i < dai_nr; i++) {
849 
850                 pmod = info->dai_info[i].playback.ssi;
851                 cmod = info->dai_info[i].capture.ssi;
852 
853                 /*
854                  *      init rsnd_dai
855                  */
856                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
857                 rdai[i].priv = priv;
858 
859                 /*
860                  *      init snd_soc_dai_driver
861                  */
862                 drv[i].name     = rdai[i].name;
863                 drv[i].ops      = &rsnd_soc_dai_ops;
864                 if (pmod) {
865                         snprintf(rdai[i].playback.name, RSND_DAI_NAME_SIZE,
866                                  "DAI%d Playback", i);
867 
868                         drv[i].playback.rates           = RSND_RATES;
869                         drv[i].playback.formats         = RSND_FMTS;
870                         drv[i].playback.channels_min    = 2;
871                         drv[i].playback.channels_max    = 2;
872                         drv[i].playback.stream_name     = rdai[i].playback.name;
873 
874                         rdai[i].playback.info = &info->dai_info[i].playback;
875                         rdai[i].playback.rdai = rdai + i;
876                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
877                 }
878                 if (cmod) {
879                         snprintf(rdai[i].capture.name, RSND_DAI_NAME_SIZE,
880                                  "DAI%d Capture", i);
881 
882                         drv[i].capture.rates            = RSND_RATES;
883                         drv[i].capture.formats          = RSND_FMTS;
884                         drv[i].capture.channels_min     = 2;
885                         drv[i].capture.channels_max     = 2;
886                         drv[i].capture.stream_name      = rdai[i].capture.name;
887 
888                         rdai[i].capture.info = &info->dai_info[i].capture;
889                         rdai[i].capture.rdai = rdai + i;
890                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
891                 }
892 
893                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
894                         pmod ? "play"    : " -- ",
895                         cmod ? "capture" : "  --   ");
896         }
897 
898         return 0;
899 }
900 
901 /*
902  *              pcm ops
903  */
904 static struct snd_pcm_hardware rsnd_pcm_hardware = {
905         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
906                         SNDRV_PCM_INFO_MMAP             |
907                         SNDRV_PCM_INFO_MMAP_VALID,
908         .buffer_bytes_max       = 64 * 1024,
909         .period_bytes_min       = 32,
910         .period_bytes_max       = 8192,
911         .periods_min            = 1,
912         .periods_max            = 32,
913         .fifo_size              = 256,
914 };
915 
916 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
917 {
918         struct snd_pcm_runtime *runtime = substream->runtime;
919         int ret = 0;
920 
921         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
922 
923         ret = snd_pcm_hw_constraint_integer(runtime,
924                                             SNDRV_PCM_HW_PARAM_PERIODS);
925 
926         return ret;
927 }
928 
929 static int rsnd_hw_params(struct snd_pcm_substream *substream,
930                          struct snd_pcm_hw_params *hw_params)
931 {
932         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
933         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
934         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
935         int ret;
936 
937         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
938         if (ret)
939                 return ret;
940 
941         return snd_pcm_lib_malloc_pages(substream,
942                                         params_buffer_bytes(hw_params));
943 }
944 
945 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
946 {
947         struct snd_pcm_runtime *runtime = substream->runtime;
948         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
949         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
950         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
951 
952         return bytes_to_frames(runtime, io->byte_pos);
953 }
954 
955 static struct snd_pcm_ops rsnd_pcm_ops = {
956         .open           = rsnd_pcm_open,
957         .ioctl          = snd_pcm_lib_ioctl,
958         .hw_params      = rsnd_hw_params,
959         .hw_free        = snd_pcm_lib_free_pages,
960         .pointer        = rsnd_pointer,
961 };
962 
963 /*
964  *              snd_kcontrol
965  */
966 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
967 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
968                            struct snd_ctl_elem_info *uinfo)
969 {
970         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
971 
972         if (cfg->texts) {
973                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
974                 uinfo->count = cfg->size;
975                 uinfo->value.enumerated.items = cfg->max;
976                 if (uinfo->value.enumerated.item >= cfg->max)
977                         uinfo->value.enumerated.item = cfg->max - 1;
978                 strlcpy(uinfo->value.enumerated.name,
979                         cfg->texts[uinfo->value.enumerated.item],
980                         sizeof(uinfo->value.enumerated.name));
981         } else {
982                 uinfo->count = cfg->size;
983                 uinfo->value.integer.min = 0;
984                 uinfo->value.integer.max = cfg->max;
985                 uinfo->type = (cfg->max == 1) ?
986                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
987                         SNDRV_CTL_ELEM_TYPE_INTEGER;
988         }
989 
990         return 0;
991 }
992 
993 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
994                           struct snd_ctl_elem_value *uc)
995 {
996         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
997         int i;
998 
999         for (i = 0; i < cfg->size; i++)
1000                 if (cfg->texts)
1001                         uc->value.enumerated.item[i] = cfg->val[i];
1002                 else
1003                         uc->value.integer.value[i] = cfg->val[i];
1004 
1005         return 0;
1006 }
1007 
1008 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
1009                           struct snd_ctl_elem_value *uc)
1010 {
1011         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
1012         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1013         int i, change = 0;
1014 
1015         for (i = 0; i < cfg->size; i++) {
1016                 if (cfg->texts) {
1017                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
1018                         cfg->val[i] = uc->value.enumerated.item[i];
1019                 } else {
1020                         change |= (uc->value.integer.value[i] != cfg->val[i]);
1021                         cfg->val[i] = uc->value.integer.value[i];
1022                 }
1023         }
1024 
1025         if (change)
1026                 cfg->update(cfg->io, mod);
1027 
1028         return change;
1029 }
1030 
1031 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
1032                             struct rsnd_dai_stream *io,
1033                             struct snd_soc_pcm_runtime *rtd,
1034                             const unsigned char *name,
1035                             struct rsnd_kctrl_cfg *cfg,
1036                             void (*update)(struct rsnd_dai_stream *io,
1037                                            struct rsnd_mod *mod))
1038 {
1039         struct snd_soc_card *soc_card = rtd->card;
1040         struct snd_card *card = rtd->card->snd_card;
1041         struct snd_kcontrol *kctrl;
1042         struct snd_kcontrol_new knew = {
1043                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
1044                 .name           = name,
1045                 .info           = rsnd_kctrl_info,
1046                 .index          = rtd - soc_card->rtd,
1047                 .get            = rsnd_kctrl_get,
1048                 .put            = rsnd_kctrl_put,
1049                 .private_value  = (unsigned long)cfg,
1050         };
1051         int ret;
1052 
1053         kctrl = snd_ctl_new1(&knew, mod);
1054         if (!kctrl)
1055                 return -ENOMEM;
1056 
1057         ret = snd_ctl_add(card, kctrl);
1058         if (ret < 0) {
1059                 snd_ctl_free_one(kctrl);
1060                 return ret;
1061         }
1062 
1063         cfg->update = update;
1064         cfg->card = card;
1065         cfg->kctrl = kctrl;
1066         cfg->io = io;
1067 
1068         return 0;
1069 }
1070 
1071 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
1072 {
1073         snd_ctl_remove(cfg->card, cfg->kctrl);
1074 }
1075 
1076 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
1077                      struct rsnd_dai_stream *io,
1078                      struct snd_soc_pcm_runtime *rtd,
1079                      const unsigned char *name,
1080                      void (*update)(struct rsnd_dai_stream *io,
1081                                     struct rsnd_mod *mod),
1082                      struct rsnd_kctrl_cfg_m *_cfg,
1083                      u32 max)
1084 {
1085         _cfg->cfg.max   = max;
1086         _cfg->cfg.size  = RSND_DVC_CHANNELS;
1087         _cfg->cfg.val   = _cfg->val;
1088         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1089 }
1090 
1091 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
1092                      struct rsnd_dai_stream *io,
1093                      struct snd_soc_pcm_runtime *rtd,
1094                      const unsigned char *name,
1095                      void (*update)(struct rsnd_dai_stream *io,
1096                                     struct rsnd_mod *mod),
1097                      struct rsnd_kctrl_cfg_s *_cfg,
1098                      u32 max)
1099 {
1100         _cfg->cfg.max   = max;
1101         _cfg->cfg.size  = 1;
1102         _cfg->cfg.val   = &_cfg->val;
1103         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1104 }
1105 
1106 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1107                      struct rsnd_dai_stream *io,
1108                      struct snd_soc_pcm_runtime *rtd,
1109                      const unsigned char *name,
1110                      struct rsnd_kctrl_cfg_s *_cfg,
1111                      void (*update)(struct rsnd_dai_stream *io,
1112                                     struct rsnd_mod *mod),
1113                      const char * const *texts,
1114                      u32 max)
1115 {
1116         _cfg->cfg.max   = max;
1117         _cfg->cfg.size  = 1;
1118         _cfg->cfg.val   = &_cfg->val;
1119         _cfg->cfg.texts = texts;
1120         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1121 }
1122 
1123 /*
1124  *              snd_soc_platform
1125  */
1126 
1127 #define PREALLOC_BUFFER         (32 * 1024)
1128 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1129 
1130 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1131 {
1132         struct snd_soc_dai *dai = rtd->cpu_dai;
1133         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1134         int ret;
1135 
1136         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1137         if (ret)
1138                 return ret;
1139 
1140         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1141         if (ret)
1142                 return ret;
1143 
1144         return snd_pcm_lib_preallocate_pages_for_all(
1145                 rtd->pcm,
1146                 SNDRV_DMA_TYPE_DEV,
1147                 rtd->card->snd_card->dev,
1148                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1149 }
1150 
1151 static struct snd_soc_platform_driver rsnd_soc_platform = {
1152         .ops            = &rsnd_pcm_ops,
1153         .pcm_new        = rsnd_pcm_new,
1154 };
1155 
1156 static const struct snd_soc_component_driver rsnd_soc_component = {
1157         .name           = "rsnd",
1158 };
1159 
1160 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1161                                        struct rsnd_dai_stream *io)
1162 {
1163         int ret;
1164 
1165         ret = rsnd_dai_call(probe, io, priv);
1166         if (ret == -EAGAIN) {
1167                 /*
1168                  * Fallback to PIO mode
1169                  */
1170 
1171                 /*
1172                  * call "remove" for SSI/SRC/DVC
1173                  * SSI will be switch to PIO mode if it was DMA mode
1174                  * see
1175                  *      rsnd_dma_init()
1176                  *      rsnd_ssi_fallback()
1177                  */
1178                 rsnd_dai_call(remove, io, priv);
1179 
1180                 /*
1181                  * remove SRC/DVC from DAI,
1182                  */
1183                 rsnd_path_remove(priv, io, src);
1184                 rsnd_path_remove(priv, io, dvc);
1185 
1186                 /*
1187                  * fallback
1188                  */
1189                 rsnd_dai_call(fallback, io, priv);
1190 
1191                 /*
1192                  * retry to "probe".
1193                  * DAI has SSI which is PIO mode only now.
1194                  */
1195                 ret = rsnd_dai_call(probe, io, priv);
1196         }
1197 
1198         return ret;
1199 }
1200 
1201 /*
1202  *      rsnd probe
1203  */
1204 static int rsnd_probe(struct platform_device *pdev)
1205 {
1206         struct rcar_snd_info *info;
1207         struct rsnd_priv *priv;
1208         struct device *dev = &pdev->dev;
1209         struct rsnd_dai *rdai;
1210         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1211         const struct rsnd_of_data *of_data;
1212         int (*probe_func[])(struct platform_device *pdev,
1213                             const struct rsnd_of_data *of_data,
1214                             struct rsnd_priv *priv) = {
1215                 rsnd_gen_probe,
1216                 rsnd_dma_probe,
1217                 rsnd_ssi_probe,
1218                 rsnd_src_probe,
1219                 rsnd_ctu_probe,
1220                 rsnd_mix_probe,
1221                 rsnd_dvc_probe,
1222                 rsnd_adg_probe,
1223                 rsnd_dai_probe,
1224         };
1225         int ret, i;
1226 
1227         info = NULL;
1228         of_data = NULL;
1229         if (of_id) {
1230                 info = devm_kzalloc(&pdev->dev,
1231                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1232                 of_data = of_id->data;
1233         } else {
1234                 info = pdev->dev.platform_data;
1235         }
1236 
1237         if (!info) {
1238                 dev_err(dev, "driver needs R-Car sound information\n");
1239                 return -ENODEV;
1240         }
1241 
1242         /*
1243          *      init priv data
1244          */
1245         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1246         if (!priv) {
1247                 dev_err(dev, "priv allocate failed\n");
1248                 return -ENODEV;
1249         }
1250 
1251         priv->pdev      = pdev;
1252         priv->info      = info;
1253         spin_lock_init(&priv->lock);
1254 
1255         /*
1256          *      init each module
1257          */
1258         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1259                 ret = probe_func[i](pdev, of_data, priv);
1260                 if (ret)
1261                         return ret;
1262         }
1263 
1264         for_each_rsnd_dai(rdai, priv, i) {
1265                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1266                 if (ret)
1267                         goto exit_snd_probe;
1268 
1269                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1270                 if (ret)
1271                         goto exit_snd_probe;
1272         }
1273 
1274         dev_set_drvdata(dev, priv);
1275 
1276         /*
1277          *      asoc register
1278          */
1279         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1280         if (ret < 0) {
1281                 dev_err(dev, "cannot snd soc register\n");
1282                 return ret;
1283         }
1284 
1285         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1286                                          priv->daidrv, rsnd_rdai_nr(priv));
1287         if (ret < 0) {
1288                 dev_err(dev, "cannot snd dai register\n");
1289                 goto exit_snd_soc;
1290         }
1291 
1292         pm_runtime_enable(dev);
1293 
1294         dev_info(dev, "probed\n");
1295         return ret;
1296 
1297 exit_snd_soc:
1298         snd_soc_unregister_platform(dev);
1299 exit_snd_probe:
1300         for_each_rsnd_dai(rdai, priv, i) {
1301                 rsnd_dai_call(remove, &rdai->playback, priv);
1302                 rsnd_dai_call(remove, &rdai->capture, priv);
1303         }
1304 
1305         return ret;
1306 }
1307 
1308 static int rsnd_remove(struct platform_device *pdev)
1309 {
1310         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1311         struct rsnd_dai *rdai;
1312         void (*remove_func[])(struct platform_device *pdev,
1313                               struct rsnd_priv *priv) = {
1314                 rsnd_ssi_remove,
1315                 rsnd_src_remove,
1316                 rsnd_ctu_remove,
1317                 rsnd_mix_remove,
1318                 rsnd_dvc_remove,
1319         };
1320         int ret = 0, i;
1321 
1322         pm_runtime_disable(&pdev->dev);
1323 
1324         for_each_rsnd_dai(rdai, priv, i) {
1325                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1326                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1327         }
1328 
1329         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1330                 remove_func[i](pdev, priv);
1331 
1332         snd_soc_unregister_component(&pdev->dev);
1333         snd_soc_unregister_platform(&pdev->dev);
1334 
1335         return ret;
1336 }
1337 
1338 static struct platform_driver rsnd_driver = {
1339         .driver = {
1340                 .name   = "rcar_sound",
1341                 .of_match_table = rsnd_of_match,
1342         },
1343         .probe          = rsnd_probe,
1344         .remove         = rsnd_remove,
1345 };
1346 module_platform_driver(rsnd_driver);
1347 
1348 MODULE_LICENSE("GPL");
1349 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1350 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1351 MODULE_ALIAS("platform:rcar-pcm-audio");
1352 

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