Version:  2.0.40 2.2.26 2.4.37 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2

Linux/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 "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  *      settting function
207  */
208 u32 rsnd_get_adinr(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 /*
231  *      rsnd_dai functions
232  */
233 #define __rsnd_mod_call(mod, io, func, param...)                \
234 ({                                                              \
235         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
236         struct device *dev = rsnd_priv_to_dev(priv);            \
237         u32 mask = 0xF << __rsnd_mod_shift_##func;                      \
238         u8 val  = (mod->status >> __rsnd_mod_shift_##func) & 0xF;       \
239         u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);                \
240         int ret = 0;                                                    \
241         int called = 0;                                                 \
242         if (val == __rsnd_mod_call_##func) {                            \
243                 called = 1;                                             \
244                 ret = (mod)->ops->func(mod, io, param);                 \
245                 mod->status = (mod->status & ~mask) +                   \
246                         (add << __rsnd_mod_shift_##func);               \
247         }                                                               \
248         dev_dbg(dev, "%s[%d] 0x%08x %s\n",                              \
249                 rsnd_mod_name(mod), rsnd_mod_id(mod), mod->status,      \
250                 called ? #func : "");                                   \
251         ret;                                                            \
252 })
253 
254 #define rsnd_mod_call(mod, io, func, param...)  \
255         (!(mod) ? -ENODEV :                     \
256          !((mod)->ops->func) ? 0 :              \
257          __rsnd_mod_call(mod, io, func, param))
258 
259 #define rsnd_dai_call(fn, io, param...)                         \
260 ({                                                              \
261         struct rsnd_mod *mod;                                   \
262         int ret = 0, i;                                         \
263         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
264                 mod = (io)->mod[i];                             \
265                 if (!mod)                                       \
266                         continue;                               \
267                 ret = rsnd_mod_call(mod, io, fn, param);        \
268                 if (ret < 0)                                    \
269                         break;                                  \
270         }                                                       \
271         ret;                                                    \
272 })
273 
274 static int rsnd_dai_connect(struct rsnd_mod *mod,
275                             struct rsnd_dai_stream *io)
276 {
277         if (!mod)
278                 return -EIO;
279 
280         if (io->mod[mod->type]) {
281                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
282                 struct device *dev = rsnd_priv_to_dev(priv);
283 
284                 dev_err(dev, "%s[%d] is not empty\n",
285                         rsnd_mod_name(mod),
286                         rsnd_mod_id(mod));
287                 return -EIO;
288         }
289 
290         io->mod[mod->type] = mod;
291 
292         return 0;
293 }
294 
295 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
296                                 struct rsnd_dai_stream *io)
297 {
298         io->mod[mod->type] = NULL;
299 }
300 
301 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
302 {
303         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
304                 return NULL;
305 
306         return priv->rdai + id;
307 }
308 
309 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
310 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
311 {
312         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
313 
314         return rsnd_rdai_get(priv, dai->id);
315 }
316 
317 /*
318  *      rsnd_soc_dai functions
319  */
320 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
321 {
322         struct snd_pcm_substream *substream = io->substream;
323         struct snd_pcm_runtime *runtime = substream->runtime;
324         int pos = io->byte_pos + additional;
325 
326         pos %= (runtime->periods * io->byte_per_period);
327 
328         return pos;
329 }
330 
331 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
332 {
333         io->byte_pos += byte;
334 
335         if (io->byte_pos >= io->next_period_byte) {
336                 struct snd_pcm_substream *substream = io->substream;
337                 struct snd_pcm_runtime *runtime = substream->runtime;
338 
339                 io->period_pos++;
340                 io->next_period_byte += io->byte_per_period;
341 
342                 if (io->period_pos >= runtime->periods) {
343                         io->byte_pos = 0;
344                         io->period_pos = 0;
345                         io->next_period_byte = io->byte_per_period;
346                 }
347 
348                 return true;
349         }
350 
351         return false;
352 }
353 
354 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
355 {
356         struct snd_pcm_substream *substream = io->substream;
357 
358         /*
359          * this function should be called...
360          *
361          * - if rsnd_dai_pointer_update() returns true
362          * - without spin lock
363          */
364 
365         snd_pcm_period_elapsed(substream);
366 }
367 
368 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
369                                 struct snd_pcm_substream *substream)
370 {
371         struct snd_pcm_runtime *runtime = substream->runtime;
372 
373         io->substream           = substream;
374         io->byte_pos            = 0;
375         io->period_pos          = 0;
376         io->byte_per_period     = runtime->period_size *
377                                   runtime->channels *
378                                   samples_to_bytes(runtime, 1);
379         io->next_period_byte    = io->byte_per_period;
380 }
381 
382 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
383 {
384         io->substream           = NULL;
385 }
386 
387 static
388 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
389 {
390         struct snd_soc_pcm_runtime *rtd = substream->private_data;
391 
392         return  rtd->cpu_dai;
393 }
394 
395 static
396 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
397                                         struct snd_pcm_substream *substream)
398 {
399         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
400                 return &rdai->playback;
401         else
402                 return &rdai->capture;
403 }
404 
405 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
406                             struct snd_soc_dai *dai)
407 {
408         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
409         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
410         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
411         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
412         int ret;
413         unsigned long flags;
414 
415         spin_lock_irqsave(&priv->lock, flags);
416 
417         switch (cmd) {
418         case SNDRV_PCM_TRIGGER_START:
419                 rsnd_dai_stream_init(io, substream);
420 
421                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
422                 if (ret < 0)
423                         goto dai_trigger_end;
424 
425                 ret = rsnd_dai_call(init, io, priv);
426                 if (ret < 0)
427                         goto dai_trigger_end;
428 
429                 ret = rsnd_dai_call(start, io, priv);
430                 if (ret < 0)
431                         goto dai_trigger_end;
432                 break;
433         case SNDRV_PCM_TRIGGER_STOP:
434                 ret = rsnd_dai_call(stop, io, priv);
435                 if (ret < 0)
436                         goto dai_trigger_end;
437 
438                 ret = rsnd_dai_call(quit, io, priv);
439                 if (ret < 0)
440                         goto dai_trigger_end;
441 
442                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
443                 if (ret < 0)
444                         goto dai_trigger_end;
445 
446                 rsnd_dai_stream_quit(io);
447                 break;
448         default:
449                 ret = -EINVAL;
450         }
451 
452 dai_trigger_end:
453         spin_unlock_irqrestore(&priv->lock, flags);
454 
455         return ret;
456 }
457 
458 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
459 {
460         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
461 
462         /* set master/slave audio interface */
463         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
464         case SND_SOC_DAIFMT_CBM_CFM:
465                 rdai->clk_master = 0;
466                 break;
467         case SND_SOC_DAIFMT_CBS_CFS:
468                 rdai->clk_master = 1; /* codec is slave, cpu is master */
469                 break;
470         default:
471                 return -EINVAL;
472         }
473 
474         /* set format */
475         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
476         case SND_SOC_DAIFMT_I2S:
477                 rdai->sys_delay = 0;
478                 rdai->data_alignment = 0;
479                 rdai->frm_clk_inv = 0;
480                 break;
481         case SND_SOC_DAIFMT_LEFT_J:
482                 rdai->sys_delay = 1;
483                 rdai->data_alignment = 0;
484                 rdai->frm_clk_inv = 1;
485                 break;
486         case SND_SOC_DAIFMT_RIGHT_J:
487                 rdai->sys_delay = 1;
488                 rdai->data_alignment = 1;
489                 rdai->frm_clk_inv = 1;
490                 break;
491         }
492 
493         /* set clock inversion */
494         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
495         case SND_SOC_DAIFMT_NB_IF:
496                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
497                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
498                 break;
499         case SND_SOC_DAIFMT_IB_NF:
500                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
501                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
502                 break;
503         case SND_SOC_DAIFMT_IB_IF:
504                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
505                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
506                 break;
507         case SND_SOC_DAIFMT_NB_NF:
508         default:
509                 break;
510         }
511 
512         return 0;
513 }
514 
515 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
516         .trigger        = rsnd_soc_dai_trigger,
517         .set_fmt        = rsnd_soc_dai_set_fmt,
518 };
519 
520 #define rsnd_path_parse(priv, io, type)                         \
521 ({                                                              \
522         struct rsnd_mod *mod;                                   \
523         int ret = 0;                                            \
524         int id = -1;                                            \
525                                                                 \
526         if (rsnd_is_enable_path(io, type)) {                    \
527                 id = rsnd_info_id(priv, io, type);              \
528                 if (id >= 0) {                                  \
529                         mod = rsnd_##type##_mod_get(priv, id);  \
530                         ret = rsnd_dai_connect(mod, io);        \
531                 }                                               \
532         }                                                       \
533         ret;                                                    \
534 })
535 
536 #define rsnd_path_break(priv, io, type)                         \
537 {                                                               \
538         struct rsnd_mod *mod;                                   \
539         int id = -1;                                            \
540                                                                 \
541         if (rsnd_is_enable_path(io, type)) {                    \
542                 id = rsnd_info_id(priv, io, type);              \
543                 if (id >= 0) {                                  \
544                         mod = rsnd_##type##_mod_get(priv, id);  \
545                         rsnd_dai_disconnect(mod, io);           \
546                 }                                               \
547         }                                                       \
548 }
549 
550 static int rsnd_path_init(struct rsnd_priv *priv,
551                           struct rsnd_dai *rdai,
552                           struct rsnd_dai_stream *io)
553 {
554         int ret;
555 
556         /*
557          * Gen1 is created by SRU/SSI, and this SRU is base module of
558          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
559          *
560          * Easy image is..
561          *      Gen1 SRU = Gen2 SCU + SSIU + etc
562          *
563          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
564          * using fixed path.
565          */
566 
567         /* SRC */
568         ret = rsnd_path_parse(priv, io, src);
569         if (ret < 0)
570                 return ret;
571 
572         /* SSI */
573         ret = rsnd_path_parse(priv, io, ssi);
574         if (ret < 0)
575                 return ret;
576 
577         /* DVC */
578         ret = rsnd_path_parse(priv, io, dvc);
579         if (ret < 0)
580                 return ret;
581 
582         return ret;
583 }
584 
585 static void rsnd_of_parse_dai(struct platform_device *pdev,
586                               const struct rsnd_of_data *of_data,
587                               struct rsnd_priv *priv)
588 {
589         struct device_node *dai_node,   *dai_np;
590         struct device_node *ssi_node,   *ssi_np;
591         struct device_node *src_node,   *src_np;
592         struct device_node *dvc_node,   *dvc_np;
593         struct device_node *playback, *capture;
594         struct rsnd_dai_platform_info *dai_info;
595         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
596         struct device *dev = &pdev->dev;
597         int nr, i;
598         int dai_i, ssi_i, src_i, dvc_i;
599 
600         if (!of_data)
601                 return;
602 
603         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
604         if (!dai_node)
605                 return;
606 
607         nr = of_get_child_count(dai_node);
608         if (!nr)
609                 return;
610 
611         dai_info = devm_kzalloc(dev,
612                                 sizeof(struct rsnd_dai_platform_info) * nr,
613                                 GFP_KERNEL);
614         if (!dai_info) {
615                 dev_err(dev, "dai info allocation error\n");
616                 return;
617         }
618 
619         info->dai_info_nr       = nr;
620         info->dai_info          = dai_info;
621 
622         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
623         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
624         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
625 
626 #define mod_parse(name)                                                 \
627 if (name##_node) {                                                      \
628         struct rsnd_##name##_platform_info *name##_info;                \
629                                                                         \
630         name##_i = 0;                                                   \
631         for_each_child_of_node(name##_node, name##_np) {                \
632                 name##_info = info->name##_info + name##_i;             \
633                                                                         \
634                 if (name##_np == playback)                              \
635                         dai_info->playback.name = name##_info;          \
636                 if (name##_np == capture)                               \
637                         dai_info->capture.name = name##_info;           \
638                                                                         \
639                 name##_i++;                                             \
640         }                                                               \
641 }
642 
643         /*
644          * parse all dai
645          */
646         dai_i = 0;
647         for_each_child_of_node(dai_node, dai_np) {
648                 dai_info = info->dai_info + dai_i;
649 
650                 for (i = 0;; i++) {
651 
652                         playback = of_parse_phandle(dai_np, "playback", i);
653                         capture  = of_parse_phandle(dai_np, "capture", i);
654 
655                         if (!playback && !capture)
656                                 break;
657 
658                         mod_parse(ssi);
659                         mod_parse(src);
660                         mod_parse(dvc);
661 
662                         of_node_put(playback);
663                         of_node_put(capture);
664                 }
665 
666                 dai_i++;
667         }
668 }
669 
670 static int rsnd_dai_probe(struct platform_device *pdev,
671                           const struct rsnd_of_data *of_data,
672                           struct rsnd_priv *priv)
673 {
674         struct snd_soc_dai_driver *drv;
675         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
676         struct rsnd_dai *rdai;
677         struct rsnd_ssi_platform_info *pmod, *cmod;
678         struct device *dev = rsnd_priv_to_dev(priv);
679         int dai_nr;
680         int i;
681 
682         rsnd_of_parse_dai(pdev, of_data, priv);
683 
684         dai_nr = info->dai_info_nr;
685         if (!dai_nr) {
686                 dev_err(dev, "no dai\n");
687                 return -EIO;
688         }
689 
690         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
691         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
692         if (!drv || !rdai) {
693                 dev_err(dev, "dai allocate failed\n");
694                 return -ENOMEM;
695         }
696 
697         priv->rdai_nr   = dai_nr;
698         priv->daidrv    = drv;
699         priv->rdai      = rdai;
700 
701         for (i = 0; i < dai_nr; i++) {
702 
703                 pmod = info->dai_info[i].playback.ssi;
704                 cmod = info->dai_info[i].capture.ssi;
705 
706                 /*
707                  *      init rsnd_dai
708                  */
709                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
710                 rdai[i].priv = priv;
711 
712                 /*
713                  *      init snd_soc_dai_driver
714                  */
715                 drv[i].name     = rdai[i].name;
716                 drv[i].ops      = &rsnd_soc_dai_ops;
717                 if (pmod) {
718                         snprintf(rdai[i].playback.name, RSND_DAI_NAME_SIZE,
719                                  "DAI%d Playback", i);
720 
721                         drv[i].playback.rates           = RSND_RATES;
722                         drv[i].playback.formats         = RSND_FMTS;
723                         drv[i].playback.channels_min    = 2;
724                         drv[i].playback.channels_max    = 2;
725                         drv[i].playback.stream_name     = rdai[i].playback.name;
726 
727                         rdai[i].playback.info = &info->dai_info[i].playback;
728                         rdai[i].playback.rdai = rdai + i;
729                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
730                 }
731                 if (cmod) {
732                         snprintf(rdai[i].capture.name, RSND_DAI_NAME_SIZE,
733                                  "DAI%d Capture", i);
734 
735                         drv[i].capture.rates            = RSND_RATES;
736                         drv[i].capture.formats          = RSND_FMTS;
737                         drv[i].capture.channels_min     = 2;
738                         drv[i].capture.channels_max     = 2;
739                         drv[i].capture.stream_name      = rdai[i].capture.name;
740 
741                         rdai[i].capture.info = &info->dai_info[i].capture;
742                         rdai[i].capture.rdai = rdai + i;
743                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
744                 }
745 
746                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
747                         pmod ? "play"    : " -- ",
748                         cmod ? "capture" : "  --   ");
749         }
750 
751         return 0;
752 }
753 
754 /*
755  *              pcm ops
756  */
757 static struct snd_pcm_hardware rsnd_pcm_hardware = {
758         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
759                         SNDRV_PCM_INFO_MMAP             |
760                         SNDRV_PCM_INFO_MMAP_VALID,
761         .buffer_bytes_max       = 64 * 1024,
762         .period_bytes_min       = 32,
763         .period_bytes_max       = 8192,
764         .periods_min            = 1,
765         .periods_max            = 32,
766         .fifo_size              = 256,
767 };
768 
769 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
770 {
771         struct snd_pcm_runtime *runtime = substream->runtime;
772         int ret = 0;
773 
774         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
775 
776         ret = snd_pcm_hw_constraint_integer(runtime,
777                                             SNDRV_PCM_HW_PARAM_PERIODS);
778 
779         return ret;
780 }
781 
782 static int rsnd_hw_params(struct snd_pcm_substream *substream,
783                          struct snd_pcm_hw_params *hw_params)
784 {
785         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
786         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
787         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
788         int ret;
789 
790         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
791         if (ret)
792                 return ret;
793 
794         return snd_pcm_lib_malloc_pages(substream,
795                                         params_buffer_bytes(hw_params));
796 }
797 
798 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
799 {
800         struct snd_pcm_runtime *runtime = substream->runtime;
801         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
802         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
803         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
804 
805         return bytes_to_frames(runtime, io->byte_pos);
806 }
807 
808 static struct snd_pcm_ops rsnd_pcm_ops = {
809         .open           = rsnd_pcm_open,
810         .ioctl          = snd_pcm_lib_ioctl,
811         .hw_params      = rsnd_hw_params,
812         .hw_free        = snd_pcm_lib_free_pages,
813         .pointer        = rsnd_pointer,
814 };
815 
816 /*
817  *              snd_kcontrol
818  */
819 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
820 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
821                            struct snd_ctl_elem_info *uinfo)
822 {
823         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
824 
825         if (cfg->texts) {
826                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
827                 uinfo->count = cfg->size;
828                 uinfo->value.enumerated.items = cfg->max;
829                 if (uinfo->value.enumerated.item >= cfg->max)
830                         uinfo->value.enumerated.item = cfg->max - 1;
831                 strlcpy(uinfo->value.enumerated.name,
832                         cfg->texts[uinfo->value.enumerated.item],
833                         sizeof(uinfo->value.enumerated.name));
834         } else {
835                 uinfo->count = cfg->size;
836                 uinfo->value.integer.min = 0;
837                 uinfo->value.integer.max = cfg->max;
838                 uinfo->type = (cfg->max == 1) ?
839                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
840                         SNDRV_CTL_ELEM_TYPE_INTEGER;
841         }
842 
843         return 0;
844 }
845 
846 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
847                           struct snd_ctl_elem_value *uc)
848 {
849         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
850         int i;
851 
852         for (i = 0; i < cfg->size; i++)
853                 if (cfg->texts)
854                         uc->value.enumerated.item[i] = cfg->val[i];
855                 else
856                         uc->value.integer.value[i] = cfg->val[i];
857 
858         return 0;
859 }
860 
861 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
862                           struct snd_ctl_elem_value *uc)
863 {
864         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
865         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
866         int i, change = 0;
867 
868         for (i = 0; i < cfg->size; i++) {
869                 if (cfg->texts) {
870                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
871                         cfg->val[i] = uc->value.enumerated.item[i];
872                 } else {
873                         change |= (uc->value.integer.value[i] != cfg->val[i]);
874                         cfg->val[i] = uc->value.integer.value[i];
875                 }
876         }
877 
878         if (change)
879                 cfg->update(cfg->io, mod);
880 
881         return change;
882 }
883 
884 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
885                             struct rsnd_dai_stream *io,
886                             struct snd_soc_pcm_runtime *rtd,
887                             const unsigned char *name,
888                             struct rsnd_kctrl_cfg *cfg,
889                             void (*update)(struct rsnd_dai_stream *io,
890                                            struct rsnd_mod *mod))
891 {
892         struct snd_soc_card *soc_card = rtd->card;
893         struct snd_card *card = rtd->card->snd_card;
894         struct snd_kcontrol *kctrl;
895         struct snd_kcontrol_new knew = {
896                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
897                 .name           = name,
898                 .info           = rsnd_kctrl_info,
899                 .index          = rtd - soc_card->rtd,
900                 .get            = rsnd_kctrl_get,
901                 .put            = rsnd_kctrl_put,
902                 .private_value  = (unsigned long)cfg,
903         };
904         int ret;
905 
906         kctrl = snd_ctl_new1(&knew, mod);
907         if (!kctrl)
908                 return -ENOMEM;
909 
910         ret = snd_ctl_add(card, kctrl);
911         if (ret < 0) {
912                 snd_ctl_free_one(kctrl);
913                 return ret;
914         }
915 
916         cfg->update = update;
917         cfg->card = card;
918         cfg->kctrl = kctrl;
919         cfg->io = io;
920 
921         return 0;
922 }
923 
924 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
925 {
926         snd_ctl_remove(cfg->card, cfg->kctrl);
927 }
928 
929 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
930                      struct rsnd_dai_stream *io,
931                      struct snd_soc_pcm_runtime *rtd,
932                      const unsigned char *name,
933                      void (*update)(struct rsnd_dai_stream *io,
934                                     struct rsnd_mod *mod),
935                      struct rsnd_kctrl_cfg_m *_cfg,
936                      u32 max)
937 {
938         _cfg->cfg.max   = max;
939         _cfg->cfg.size  = RSND_DVC_CHANNELS;
940         _cfg->cfg.val   = _cfg->val;
941         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
942 }
943 
944 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
945                      struct rsnd_dai_stream *io,
946                      struct snd_soc_pcm_runtime *rtd,
947                      const unsigned char *name,
948                      void (*update)(struct rsnd_dai_stream *io,
949                                     struct rsnd_mod *mod),
950                      struct rsnd_kctrl_cfg_s *_cfg,
951                      u32 max)
952 {
953         _cfg->cfg.max   = max;
954         _cfg->cfg.size  = 1;
955         _cfg->cfg.val   = &_cfg->val;
956         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
957 }
958 
959 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
960                      struct rsnd_dai_stream *io,
961                      struct snd_soc_pcm_runtime *rtd,
962                      const unsigned char *name,
963                      struct rsnd_kctrl_cfg_s *_cfg,
964                      void (*update)(struct rsnd_dai_stream *io,
965                                     struct rsnd_mod *mod),
966                      const char * const *texts,
967                      u32 max)
968 {
969         _cfg->cfg.max   = max;
970         _cfg->cfg.size  = 1;
971         _cfg->cfg.val   = &_cfg->val;
972         _cfg->cfg.texts = texts;
973         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
974 }
975 
976 /*
977  *              snd_soc_platform
978  */
979 
980 #define PREALLOC_BUFFER         (32 * 1024)
981 #define PREALLOC_BUFFER_MAX     (32 * 1024)
982 
983 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
984 {
985         struct snd_soc_dai *dai = rtd->cpu_dai;
986         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
987         int ret;
988 
989         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
990         if (ret)
991                 return ret;
992 
993         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
994         if (ret)
995                 return ret;
996 
997         return snd_pcm_lib_preallocate_pages_for_all(
998                 rtd->pcm,
999                 SNDRV_DMA_TYPE_DEV,
1000                 rtd->card->snd_card->dev,
1001                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1002 }
1003 
1004 static struct snd_soc_platform_driver rsnd_soc_platform = {
1005         .ops            = &rsnd_pcm_ops,
1006         .pcm_new        = rsnd_pcm_new,
1007 };
1008 
1009 static const struct snd_soc_component_driver rsnd_soc_component = {
1010         .name           = "rsnd",
1011 };
1012 
1013 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1014                                        struct rsnd_dai_stream *io)
1015 {
1016         int ret;
1017 
1018         ret = rsnd_dai_call(probe, io, priv);
1019         if (ret == -EAGAIN) {
1020                 /*
1021                  * Fallback to PIO mode
1022                  */
1023 
1024                 /*
1025                  * call "remove" for SSI/SRC/DVC
1026                  * SSI will be switch to PIO mode if it was DMA mode
1027                  * see
1028                  *      rsnd_dma_init()
1029                  *      rsnd_ssi_fallback()
1030                  */
1031                 rsnd_dai_call(remove, io, priv);
1032 
1033                 /*
1034                  * remove SRC/DVC from DAI,
1035                  */
1036                 rsnd_path_break(priv, io, src);
1037                 rsnd_path_break(priv, io, dvc);
1038 
1039                 /*
1040                  * fallback
1041                  */
1042                 rsnd_dai_call(fallback, io, priv);
1043 
1044                 /*
1045                  * retry to "probe".
1046                  * DAI has SSI which is PIO mode only now.
1047                  */
1048                 ret = rsnd_dai_call(probe, io, priv);
1049         }
1050 
1051         return ret;
1052 }
1053 
1054 /*
1055  *      rsnd probe
1056  */
1057 static int rsnd_probe(struct platform_device *pdev)
1058 {
1059         struct rcar_snd_info *info;
1060         struct rsnd_priv *priv;
1061         struct device *dev = &pdev->dev;
1062         struct rsnd_dai *rdai;
1063         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1064         const struct rsnd_of_data *of_data;
1065         int (*probe_func[])(struct platform_device *pdev,
1066                             const struct rsnd_of_data *of_data,
1067                             struct rsnd_priv *priv) = {
1068                 rsnd_gen_probe,
1069                 rsnd_dma_probe,
1070                 rsnd_ssi_probe,
1071                 rsnd_src_probe,
1072                 rsnd_dvc_probe,
1073                 rsnd_adg_probe,
1074                 rsnd_dai_probe,
1075         };
1076         int ret, i;
1077 
1078         info = NULL;
1079         of_data = NULL;
1080         if (of_id) {
1081                 info = devm_kzalloc(&pdev->dev,
1082                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1083                 of_data = of_id->data;
1084         } else {
1085                 info = pdev->dev.platform_data;
1086         }
1087 
1088         if (!info) {
1089                 dev_err(dev, "driver needs R-Car sound information\n");
1090                 return -ENODEV;
1091         }
1092 
1093         /*
1094          *      init priv data
1095          */
1096         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1097         if (!priv) {
1098                 dev_err(dev, "priv allocate failed\n");
1099                 return -ENODEV;
1100         }
1101 
1102         priv->pdev      = pdev;
1103         priv->info      = info;
1104         spin_lock_init(&priv->lock);
1105 
1106         /*
1107          *      init each module
1108          */
1109         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1110                 ret = probe_func[i](pdev, of_data, priv);
1111                 if (ret)
1112                         return ret;
1113         }
1114 
1115         for_each_rsnd_dai(rdai, priv, i) {
1116                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1117                 if (ret)
1118                         goto exit_snd_probe;
1119 
1120                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1121                 if (ret)
1122                         goto exit_snd_probe;
1123         }
1124 
1125         dev_set_drvdata(dev, priv);
1126 
1127         /*
1128          *      asoc register
1129          */
1130         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1131         if (ret < 0) {
1132                 dev_err(dev, "cannot snd soc register\n");
1133                 return ret;
1134         }
1135 
1136         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1137                                          priv->daidrv, rsnd_rdai_nr(priv));
1138         if (ret < 0) {
1139                 dev_err(dev, "cannot snd dai register\n");
1140                 goto exit_snd_soc;
1141         }
1142 
1143         pm_runtime_enable(dev);
1144 
1145         dev_info(dev, "probed\n");
1146         return ret;
1147 
1148 exit_snd_soc:
1149         snd_soc_unregister_platform(dev);
1150 exit_snd_probe:
1151         for_each_rsnd_dai(rdai, priv, i) {
1152                 rsnd_dai_call(remove, &rdai->playback, priv);
1153                 rsnd_dai_call(remove, &rdai->capture, priv);
1154         }
1155 
1156         return ret;
1157 }
1158 
1159 static int rsnd_remove(struct platform_device *pdev)
1160 {
1161         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1162         struct rsnd_dai *rdai;
1163         void (*remove_func[])(struct platform_device *pdev,
1164                               struct rsnd_priv *priv) = {
1165                 rsnd_ssi_remove,
1166                 rsnd_src_remove,
1167                 rsnd_dvc_remove,
1168         };
1169         int ret = 0, i;
1170 
1171         pm_runtime_disable(&pdev->dev);
1172 
1173         for_each_rsnd_dai(rdai, priv, i) {
1174                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1175                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1176         }
1177 
1178         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1179                 remove_func[i](pdev, priv);
1180 
1181         snd_soc_unregister_component(&pdev->dev);
1182         snd_soc_unregister_platform(&pdev->dev);
1183 
1184         return ret;
1185 }
1186 
1187 static struct platform_driver rsnd_driver = {
1188         .driver = {
1189                 .name   = "rcar_sound",
1190                 .of_match_table = rsnd_of_match,
1191         },
1192         .probe          = rsnd_probe,
1193         .remove         = rsnd_remove,
1194 };
1195 module_platform_driver(rsnd_driver);
1196 
1197 MODULE_LICENSE("GPL");
1198 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1199 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1200 MODULE_ALIAS("platform:rcar-pcm-audio");
1201 

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