Version:  2.0.40 2.2.26 2.4.37 3.5 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

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_mod *mod)
141 {
142         if (!mod || !mod->ops || !mod->ops->dma_req)
143                 return NULL;
144 
145         return mod->ops->dma_req(mod);
146 }
147 
148 int rsnd_mod_init(struct rsnd_mod *mod,
149                    struct rsnd_mod_ops *ops,
150                    struct clk *clk,
151                    enum rsnd_mod_type type,
152                    int id)
153 {
154         int ret = clk_prepare(clk);
155 
156         if (ret)
157                 return ret;
158 
159         mod->id         = id;
160         mod->ops        = ops;
161         mod->type       = type;
162         mod->clk        = clk;
163 
164         return ret;
165 }
166 
167 void rsnd_mod_quit(struct rsnd_mod *mod)
168 {
169         if (mod->clk)
170                 clk_unprepare(mod->clk);
171 }
172 
173 /*
174  *      settting function
175  */
176 u32 rsnd_get_adinr(struct rsnd_mod *mod)
177 {
178         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
179         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
180         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
181         struct device *dev = rsnd_priv_to_dev(priv);
182         u32 adinr = runtime->channels;
183 
184         switch (runtime->sample_bits) {
185         case 16:
186                 adinr |= (8 << 16);
187                 break;
188         case 32:
189                 adinr |= (0 << 16);
190                 break;
191         default:
192                 dev_warn(dev, "not supported sample bits\n");
193                 return 0;
194         }
195 
196         return adinr;
197 }
198 
199 /*
200  *      rsnd_dai functions
201  */
202 #define __rsnd_mod_call(mod, func, param...)                    \
203 ({                                                              \
204         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
205         struct device *dev = rsnd_priv_to_dev(priv);            \
206         u32 mask = (1 << __rsnd_mod_shift_##func) & ~(1 << 31); \
207         u32 call = __rsnd_mod_call_##func << __rsnd_mod_shift_##func;   \
208         int ret = 0;                                                    \
209         if ((mod->status & mask) == call) {                             \
210                 dev_dbg(dev, "%s[%d] %s\n",                             \
211                         rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
212                 ret = (mod)->ops->func(mod, param);                     \
213                 mod->status = (mod->status & ~mask) | (~call & mask);   \
214         }                                                               \
215         ret;                                                            \
216 })
217 
218 #define rsnd_mod_call(mod, func, param...)      \
219         (!(mod) ? -ENODEV :                     \
220          !((mod)->ops->func) ? 0 :              \
221          __rsnd_mod_call(mod, func, param))
222 
223 #define rsnd_dai_call(fn, io, param...)                         \
224 ({                                                              \
225         struct rsnd_mod *mod;                                   \
226         int ret = 0, i;                                         \
227         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
228                 mod = (io)->mod[i];                             \
229                 if (!mod)                                       \
230                         continue;                               \
231                 ret = rsnd_mod_call(mod, fn, param);            \
232                 if (ret < 0)                                    \
233                         break;                                  \
234         }                                                       \
235         ret;                                                    \
236 })
237 
238 static int rsnd_dai_connect(struct rsnd_mod *mod,
239                             struct rsnd_dai_stream *io)
240 {
241         if (!mod)
242                 return -EIO;
243 
244         if (io->mod[mod->type]) {
245                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
246                 struct device *dev = rsnd_priv_to_dev(priv);
247 
248                 dev_err(dev, "%s[%d] is not empty\n",
249                         rsnd_mod_name(mod),
250                         rsnd_mod_id(mod));
251                 return -EIO;
252         }
253 
254         io->mod[mod->type] = mod;
255         mod->io = io;
256 
257         return 0;
258 }
259 
260 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
261                                 struct rsnd_dai_stream *io)
262 {
263         mod->io = NULL;
264         io->mod[mod->type] = NULL;
265 }
266 
267 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
268 {
269         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
270                 return NULL;
271 
272         return priv->rdai + id;
273 }
274 
275 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
276 {
277         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
278 
279         return rsnd_rdai_get(priv, dai->id);
280 }
281 
282 /*
283  *      rsnd_soc_dai functions
284  */
285 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
286 {
287         struct snd_pcm_substream *substream = io->substream;
288         struct snd_pcm_runtime *runtime = substream->runtime;
289         int pos = io->byte_pos + additional;
290 
291         pos %= (runtime->periods * io->byte_per_period);
292 
293         return pos;
294 }
295 
296 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
297 {
298         io->byte_pos += byte;
299 
300         if (io->byte_pos >= io->next_period_byte) {
301                 struct snd_pcm_substream *substream = io->substream;
302                 struct snd_pcm_runtime *runtime = substream->runtime;
303 
304                 io->period_pos++;
305                 io->next_period_byte += io->byte_per_period;
306 
307                 if (io->period_pos >= runtime->periods) {
308                         io->byte_pos = 0;
309                         io->period_pos = 0;
310                         io->next_period_byte = io->byte_per_period;
311                 }
312 
313                 snd_pcm_period_elapsed(substream);
314         }
315 }
316 
317 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
318                                 struct snd_pcm_substream *substream)
319 {
320         struct snd_pcm_runtime *runtime = substream->runtime;
321 
322         io->substream           = substream;
323         io->byte_pos            = 0;
324         io->period_pos          = 0;
325         io->byte_per_period     = runtime->period_size *
326                                   runtime->channels *
327                                   samples_to_bytes(runtime, 1);
328         io->next_period_byte    = io->byte_per_period;
329 
330         return 0;
331 }
332 
333 static
334 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
335 {
336         struct snd_soc_pcm_runtime *rtd = substream->private_data;
337 
338         return  rtd->cpu_dai;
339 }
340 
341 static
342 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
343                                         struct snd_pcm_substream *substream)
344 {
345         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
346                 return &rdai->playback;
347         else
348                 return &rdai->capture;
349 }
350 
351 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
352                             struct snd_soc_dai *dai)
353 {
354         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
355         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
356         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
357         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
358         int ret;
359         unsigned long flags;
360 
361         rsnd_lock(priv, flags);
362 
363         switch (cmd) {
364         case SNDRV_PCM_TRIGGER_START:
365                 ret = rsnd_dai_stream_init(io, substream);
366                 if (ret < 0)
367                         goto dai_trigger_end;
368 
369                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
370                 if (ret < 0)
371                         goto dai_trigger_end;
372 
373                 ret = rsnd_dai_call(init, io, priv);
374                 if (ret < 0)
375                         goto dai_trigger_end;
376 
377                 ret = rsnd_dai_call(start, io, priv);
378                 if (ret < 0)
379                         goto dai_trigger_end;
380                 break;
381         case SNDRV_PCM_TRIGGER_STOP:
382                 ret = rsnd_dai_call(stop, io, priv);
383                 if (ret < 0)
384                         goto dai_trigger_end;
385 
386                 ret = rsnd_dai_call(quit, io, priv);
387                 if (ret < 0)
388                         goto dai_trigger_end;
389 
390                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
391                 if (ret < 0)
392                         goto dai_trigger_end;
393                 break;
394         default:
395                 ret = -EINVAL;
396         }
397 
398 dai_trigger_end:
399         rsnd_unlock(priv, flags);
400 
401         return ret;
402 }
403 
404 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
405 {
406         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
407 
408         /* set master/slave audio interface */
409         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
410         case SND_SOC_DAIFMT_CBM_CFM:
411                 rdai->clk_master = 0;
412                 break;
413         case SND_SOC_DAIFMT_CBS_CFS:
414                 rdai->clk_master = 1; /* codec is slave, cpu is master */
415                 break;
416         default:
417                 return -EINVAL;
418         }
419 
420         /* set format */
421         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
422         case SND_SOC_DAIFMT_I2S:
423                 rdai->sys_delay = 0;
424                 rdai->data_alignment = 0;
425                 rdai->frm_clk_inv = 0;
426                 break;
427         case SND_SOC_DAIFMT_LEFT_J:
428                 rdai->sys_delay = 1;
429                 rdai->data_alignment = 0;
430                 rdai->frm_clk_inv = 1;
431                 break;
432         case SND_SOC_DAIFMT_RIGHT_J:
433                 rdai->sys_delay = 1;
434                 rdai->data_alignment = 1;
435                 rdai->frm_clk_inv = 1;
436                 break;
437         }
438 
439         /* set clock inversion */
440         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
441         case SND_SOC_DAIFMT_NB_IF:
442                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
443                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
444                 break;
445         case SND_SOC_DAIFMT_IB_NF:
446                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
447                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
448                 break;
449         case SND_SOC_DAIFMT_IB_IF:
450                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
451                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
452                 break;
453         case SND_SOC_DAIFMT_NB_NF:
454         default:
455                 break;
456         }
457 
458         return 0;
459 }
460 
461 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
462         .trigger        = rsnd_soc_dai_trigger,
463         .set_fmt        = rsnd_soc_dai_set_fmt,
464 };
465 
466 #define rsnd_path_parse(priv, io, type)                         \
467 ({                                                              \
468         struct rsnd_mod *mod;                                   \
469         int ret = 0;                                            \
470         int id = -1;                                            \
471                                                                 \
472         if (rsnd_is_enable_path(io, type)) {                    \
473                 id = rsnd_info_id(priv, io, type);              \
474                 if (id >= 0) {                                  \
475                         mod = rsnd_##type##_mod_get(priv, id);  \
476                         ret = rsnd_dai_connect(mod, io);        \
477                 }                                               \
478         }                                                       \
479         ret;                                                    \
480 })
481 
482 #define rsnd_path_break(priv, io, type)                         \
483 {                                                               \
484         struct rsnd_mod *mod;                                   \
485         int id = -1;                                            \
486                                                                 \
487         if (rsnd_is_enable_path(io, type)) {                    \
488                 id = rsnd_info_id(priv, io, type);              \
489                 if (id >= 0) {                                  \
490                         mod = rsnd_##type##_mod_get(priv, id);  \
491                         rsnd_dai_disconnect(mod, io);           \
492                 }                                               \
493         }                                                       \
494 }
495 
496 static int rsnd_path_init(struct rsnd_priv *priv,
497                           struct rsnd_dai *rdai,
498                           struct rsnd_dai_stream *io)
499 {
500         int ret;
501 
502         /*
503          * Gen1 is created by SRU/SSI, and this SRU is base module of
504          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
505          *
506          * Easy image is..
507          *      Gen1 SRU = Gen2 SCU + SSIU + etc
508          *
509          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
510          * using fixed path.
511          */
512 
513         /* SRC */
514         ret = rsnd_path_parse(priv, io, src);
515         if (ret < 0)
516                 return ret;
517 
518         /* SSI */
519         ret = rsnd_path_parse(priv, io, ssi);
520         if (ret < 0)
521                 return ret;
522 
523         /* DVC */
524         ret = rsnd_path_parse(priv, io, dvc);
525         if (ret < 0)
526                 return ret;
527 
528         return ret;
529 }
530 
531 static void rsnd_of_parse_dai(struct platform_device *pdev,
532                               const struct rsnd_of_data *of_data,
533                               struct rsnd_priv *priv)
534 {
535         struct device_node *dai_node,   *dai_np;
536         struct device_node *ssi_node,   *ssi_np;
537         struct device_node *src_node,   *src_np;
538         struct device_node *dvc_node,   *dvc_np;
539         struct device_node *playback, *capture;
540         struct rsnd_dai_platform_info *dai_info;
541         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
542         struct device *dev = &pdev->dev;
543         int nr, i;
544         int dai_i, ssi_i, src_i, dvc_i;
545 
546         if (!of_data)
547                 return;
548 
549         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
550         if (!dai_node)
551                 return;
552 
553         nr = of_get_child_count(dai_node);
554         if (!nr)
555                 return;
556 
557         dai_info = devm_kzalloc(dev,
558                                 sizeof(struct rsnd_dai_platform_info) * nr,
559                                 GFP_KERNEL);
560         if (!dai_info) {
561                 dev_err(dev, "dai info allocation error\n");
562                 return;
563         }
564 
565         info->dai_info_nr       = nr;
566         info->dai_info          = dai_info;
567 
568         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
569         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
570         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
571 
572 #define mod_parse(name)                                                 \
573 if (name##_node) {                                                      \
574         struct rsnd_##name##_platform_info *name##_info;                \
575                                                                         \
576         name##_i = 0;                                                   \
577         for_each_child_of_node(name##_node, name##_np) {                \
578                 name##_info = info->name##_info + name##_i;             \
579                                                                         \
580                 if (name##_np == playback)                              \
581                         dai_info->playback.name = name##_info;          \
582                 if (name##_np == capture)                               \
583                         dai_info->capture.name = name##_info;           \
584                                                                         \
585                 name##_i++;                                             \
586         }                                                               \
587 }
588 
589         /*
590          * parse all dai
591          */
592         dai_i = 0;
593         for_each_child_of_node(dai_node, dai_np) {
594                 dai_info = info->dai_info + dai_i;
595 
596                 for (i = 0;; i++) {
597 
598                         playback = of_parse_phandle(dai_np, "playback", i);
599                         capture  = of_parse_phandle(dai_np, "capture", i);
600 
601                         if (!playback && !capture)
602                                 break;
603 
604                         mod_parse(ssi);
605                         mod_parse(src);
606                         mod_parse(dvc);
607 
608                         of_node_put(playback);
609                         of_node_put(capture);
610                 }
611 
612                 dai_i++;
613         }
614 }
615 
616 static int rsnd_dai_probe(struct platform_device *pdev,
617                           const struct rsnd_of_data *of_data,
618                           struct rsnd_priv *priv)
619 {
620         struct snd_soc_dai_driver *drv;
621         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
622         struct rsnd_dai *rdai;
623         struct rsnd_ssi_platform_info *pmod, *cmod;
624         struct device *dev = rsnd_priv_to_dev(priv);
625         int dai_nr;
626         int i;
627 
628         rsnd_of_parse_dai(pdev, of_data, priv);
629 
630         dai_nr = info->dai_info_nr;
631         if (!dai_nr) {
632                 dev_err(dev, "no dai\n");
633                 return -EIO;
634         }
635 
636         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
637         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
638         if (!drv || !rdai) {
639                 dev_err(dev, "dai allocate failed\n");
640                 return -ENOMEM;
641         }
642 
643         priv->rdai_nr   = dai_nr;
644         priv->daidrv    = drv;
645         priv->rdai      = rdai;
646 
647         for (i = 0; i < dai_nr; i++) {
648 
649                 pmod = info->dai_info[i].playback.ssi;
650                 cmod = info->dai_info[i].capture.ssi;
651 
652                 /*
653                  *      init rsnd_dai
654                  */
655                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
656                 rdai[i].priv = priv;
657 
658                 /*
659                  *      init snd_soc_dai_driver
660                  */
661                 drv[i].name     = rdai[i].name;
662                 drv[i].ops      = &rsnd_soc_dai_ops;
663                 if (pmod) {
664                         snprintf(rdai[i].playback.name, RSND_DAI_NAME_SIZE,
665                                  "DAI%d Playback", i);
666 
667                         drv[i].playback.rates           = RSND_RATES;
668                         drv[i].playback.formats         = RSND_FMTS;
669                         drv[i].playback.channels_min    = 2;
670                         drv[i].playback.channels_max    = 2;
671                         drv[i].playback.stream_name     = rdai[i].playback.name;
672 
673                         rdai[i].playback.info = &info->dai_info[i].playback;
674                         rdai[i].playback.rdai = rdai + i;
675                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
676                 }
677                 if (cmod) {
678                         snprintf(rdai[i].capture.name, RSND_DAI_NAME_SIZE,
679                                  "DAI%d Capture", i);
680 
681                         drv[i].capture.rates            = RSND_RATES;
682                         drv[i].capture.formats          = RSND_FMTS;
683                         drv[i].capture.channels_min     = 2;
684                         drv[i].capture.channels_max     = 2;
685                         drv[i].capture.stream_name      = rdai[i].capture.name;
686 
687                         rdai[i].capture.info = &info->dai_info[i].capture;
688                         rdai[i].capture.rdai = rdai + i;
689                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
690                 }
691 
692                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
693                         pmod ? "play"    : " -- ",
694                         cmod ? "capture" : "  --   ");
695         }
696 
697         return 0;
698 }
699 
700 /*
701  *              pcm ops
702  */
703 static struct snd_pcm_hardware rsnd_pcm_hardware = {
704         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
705                         SNDRV_PCM_INFO_MMAP             |
706                         SNDRV_PCM_INFO_MMAP_VALID,
707         .buffer_bytes_max       = 64 * 1024,
708         .period_bytes_min       = 32,
709         .period_bytes_max       = 8192,
710         .periods_min            = 1,
711         .periods_max            = 32,
712         .fifo_size              = 256,
713 };
714 
715 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
716 {
717         struct snd_pcm_runtime *runtime = substream->runtime;
718         int ret = 0;
719 
720         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
721 
722         ret = snd_pcm_hw_constraint_integer(runtime,
723                                             SNDRV_PCM_HW_PARAM_PERIODS);
724 
725         return ret;
726 }
727 
728 static int rsnd_hw_params(struct snd_pcm_substream *substream,
729                          struct snd_pcm_hw_params *hw_params)
730 {
731         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
732         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
733         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
734         int ret;
735 
736         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
737         if (ret)
738                 return ret;
739 
740         return snd_pcm_lib_malloc_pages(substream,
741                                         params_buffer_bytes(hw_params));
742 }
743 
744 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
745 {
746         struct snd_pcm_runtime *runtime = substream->runtime;
747         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
748         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
749         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
750 
751         return bytes_to_frames(runtime, io->byte_pos);
752 }
753 
754 static struct snd_pcm_ops rsnd_pcm_ops = {
755         .open           = rsnd_pcm_open,
756         .ioctl          = snd_pcm_lib_ioctl,
757         .hw_params      = rsnd_hw_params,
758         .hw_free        = snd_pcm_lib_free_pages,
759         .pointer        = rsnd_pointer,
760 };
761 
762 /*
763  *              snd_kcontrol
764  */
765 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
766 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
767                            struct snd_ctl_elem_info *uinfo)
768 {
769         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
770 
771         if (cfg->texts) {
772                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
773                 uinfo->count = cfg->size;
774                 uinfo->value.enumerated.items = cfg->max;
775                 if (uinfo->value.enumerated.item >= cfg->max)
776                         uinfo->value.enumerated.item = cfg->max - 1;
777                 strlcpy(uinfo->value.enumerated.name,
778                         cfg->texts[uinfo->value.enumerated.item],
779                         sizeof(uinfo->value.enumerated.name));
780         } else {
781                 uinfo->count = cfg->size;
782                 uinfo->value.integer.min = 0;
783                 uinfo->value.integer.max = cfg->max;
784                 uinfo->type = (cfg->max == 1) ?
785                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
786                         SNDRV_CTL_ELEM_TYPE_INTEGER;
787         }
788 
789         return 0;
790 }
791 
792 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
793                           struct snd_ctl_elem_value *uc)
794 {
795         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
796         int i;
797 
798         for (i = 0; i < cfg->size; i++)
799                 if (cfg->texts)
800                         uc->value.enumerated.item[i] = cfg->val[i];
801                 else
802                         uc->value.integer.value[i] = cfg->val[i];
803 
804         return 0;
805 }
806 
807 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
808                           struct snd_ctl_elem_value *uc)
809 {
810         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
811         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
812         int i, change = 0;
813 
814         for (i = 0; i < cfg->size; i++) {
815                 if (cfg->texts) {
816                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
817                         cfg->val[i] = uc->value.enumerated.item[i];
818                 } else {
819                         change |= (uc->value.integer.value[i] != cfg->val[i]);
820                         cfg->val[i] = uc->value.integer.value[i];
821                 }
822         }
823 
824         if (change)
825                 cfg->update(mod);
826 
827         return change;
828 }
829 
830 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
831                             struct snd_soc_pcm_runtime *rtd,
832                             const unsigned char *name,
833                             struct rsnd_kctrl_cfg *cfg,
834                             void (*update)(struct rsnd_mod *mod))
835 {
836         struct snd_card *card = rtd->card->snd_card;
837         struct snd_kcontrol *kctrl;
838         struct snd_kcontrol_new knew = {
839                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
840                 .name           = name,
841                 .info           = rsnd_kctrl_info,
842                 .get            = rsnd_kctrl_get,
843                 .put            = rsnd_kctrl_put,
844                 .private_value  = (unsigned long)cfg,
845         };
846         int ret;
847 
848         kctrl = snd_ctl_new1(&knew, mod);
849         if (!kctrl)
850                 return -ENOMEM;
851 
852         ret = snd_ctl_add(card, kctrl);
853         if (ret < 0) {
854                 snd_ctl_free_one(kctrl);
855                 return ret;
856         }
857 
858         cfg->update = update;
859         cfg->card = card;
860         cfg->kctrl = kctrl;
861 
862         return 0;
863 }
864 
865 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
866 {
867         snd_ctl_remove(cfg->card, cfg->kctrl);
868 }
869 
870 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
871                      struct snd_soc_pcm_runtime *rtd,
872                      const unsigned char *name,
873                      void (*update)(struct rsnd_mod *mod),
874                      struct rsnd_kctrl_cfg_m *_cfg,
875                      u32 max)
876 {
877         _cfg->cfg.max   = max;
878         _cfg->cfg.size  = RSND_DVC_CHANNELS;
879         _cfg->cfg.val   = _cfg->val;
880         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
881 }
882 
883 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
884                      struct snd_soc_pcm_runtime *rtd,
885                      const unsigned char *name,
886                      void (*update)(struct rsnd_mod *mod),
887                      struct rsnd_kctrl_cfg_s *_cfg,
888                      u32 max)
889 {
890         _cfg->cfg.max   = max;
891         _cfg->cfg.size  = 1;
892         _cfg->cfg.val   = &_cfg->val;
893         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
894 }
895 
896 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
897                      struct snd_soc_pcm_runtime *rtd,
898                      const unsigned char *name,
899                      struct rsnd_kctrl_cfg_s *_cfg,
900                      void (*update)(struct rsnd_mod *mod),
901                      const char * const *texts,
902                      u32 max)
903 {
904         _cfg->cfg.max   = max;
905         _cfg->cfg.size  = 1;
906         _cfg->cfg.val   = &_cfg->val;
907         _cfg->cfg.texts = texts;
908         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
909 }
910 
911 /*
912  *              snd_soc_platform
913  */
914 
915 #define PREALLOC_BUFFER         (32 * 1024)
916 #define PREALLOC_BUFFER_MAX     (32 * 1024)
917 
918 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
919 {
920         struct snd_soc_dai *dai = rtd->cpu_dai;
921         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
922         int ret;
923 
924         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
925         if (ret)
926                 return ret;
927 
928         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
929         if (ret)
930                 return ret;
931 
932         return snd_pcm_lib_preallocate_pages_for_all(
933                 rtd->pcm,
934                 SNDRV_DMA_TYPE_DEV,
935                 rtd->card->snd_card->dev,
936                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
937 }
938 
939 static struct snd_soc_platform_driver rsnd_soc_platform = {
940         .ops            = &rsnd_pcm_ops,
941         .pcm_new        = rsnd_pcm_new,
942 };
943 
944 static const struct snd_soc_component_driver rsnd_soc_component = {
945         .name           = "rsnd",
946 };
947 
948 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
949                                        struct rsnd_dai_stream *io)
950 {
951         int ret;
952 
953         ret = rsnd_dai_call(probe, io, priv);
954         if (ret == -EAGAIN) {
955                 /*
956                  * Fallback to PIO mode
957                  */
958 
959                 /*
960                  * call "remove" for SSI/SRC/DVC
961                  * SSI will be switch to PIO mode if it was DMA mode
962                  * see
963                  *      rsnd_dma_init()
964                  *      rsnd_ssi_fallback()
965                  */
966                 rsnd_dai_call(remove, io, priv);
967 
968                 /*
969                  * remove SRC/DVC from DAI,
970                  */
971                 rsnd_path_break(priv, io, src);
972                 rsnd_path_break(priv, io, dvc);
973 
974                 /*
975                  * fallback
976                  */
977                 rsnd_dai_call(fallback, io, priv);
978 
979                 /*
980                  * retry to "probe".
981                  * DAI has SSI which is PIO mode only now.
982                  */
983                 ret = rsnd_dai_call(probe, io, priv);
984         }
985 
986         return ret;
987 }
988 
989 /*
990  *      rsnd probe
991  */
992 static int rsnd_probe(struct platform_device *pdev)
993 {
994         struct rcar_snd_info *info;
995         struct rsnd_priv *priv;
996         struct device *dev = &pdev->dev;
997         struct rsnd_dai *rdai;
998         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
999         const struct rsnd_of_data *of_data;
1000         int (*probe_func[])(struct platform_device *pdev,
1001                             const struct rsnd_of_data *of_data,
1002                             struct rsnd_priv *priv) = {
1003                 rsnd_gen_probe,
1004                 rsnd_dma_probe,
1005                 rsnd_ssi_probe,
1006                 rsnd_src_probe,
1007                 rsnd_dvc_probe,
1008                 rsnd_adg_probe,
1009                 rsnd_dai_probe,
1010         };
1011         int ret, i;
1012 
1013         info = NULL;
1014         of_data = NULL;
1015         if (of_id) {
1016                 info = devm_kzalloc(&pdev->dev,
1017                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1018                 of_data = of_id->data;
1019         } else {
1020                 info = pdev->dev.platform_data;
1021         }
1022 
1023         if (!info) {
1024                 dev_err(dev, "driver needs R-Car sound information\n");
1025                 return -ENODEV;
1026         }
1027 
1028         /*
1029          *      init priv data
1030          */
1031         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1032         if (!priv) {
1033                 dev_err(dev, "priv allocate failed\n");
1034                 return -ENODEV;
1035         }
1036 
1037         priv->pdev      = pdev;
1038         priv->info      = info;
1039         spin_lock_init(&priv->lock);
1040 
1041         /*
1042          *      init each module
1043          */
1044         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1045                 ret = probe_func[i](pdev, of_data, priv);
1046                 if (ret)
1047                         return ret;
1048         }
1049 
1050         for_each_rsnd_dai(rdai, priv, i) {
1051                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1052                 if (ret)
1053                         goto exit_snd_probe;
1054 
1055                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1056                 if (ret)
1057                         goto exit_snd_probe;
1058         }
1059 
1060         dev_set_drvdata(dev, priv);
1061 
1062         /*
1063          *      asoc register
1064          */
1065         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1066         if (ret < 0) {
1067                 dev_err(dev, "cannot snd soc register\n");
1068                 return ret;
1069         }
1070 
1071         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1072                                          priv->daidrv, rsnd_rdai_nr(priv));
1073         if (ret < 0) {
1074                 dev_err(dev, "cannot snd dai register\n");
1075                 goto exit_snd_soc;
1076         }
1077 
1078         pm_runtime_enable(dev);
1079 
1080         dev_info(dev, "probed\n");
1081         return ret;
1082 
1083 exit_snd_soc:
1084         snd_soc_unregister_platform(dev);
1085 exit_snd_probe:
1086         for_each_rsnd_dai(rdai, priv, i) {
1087                 rsnd_dai_call(remove, &rdai->playback, priv);
1088                 rsnd_dai_call(remove, &rdai->capture, priv);
1089         }
1090 
1091         return ret;
1092 }
1093 
1094 static int rsnd_remove(struct platform_device *pdev)
1095 {
1096         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1097         struct rsnd_dai *rdai;
1098         void (*remove_func[])(struct platform_device *pdev,
1099                               struct rsnd_priv *priv) = {
1100                 rsnd_ssi_remove,
1101                 rsnd_src_remove,
1102                 rsnd_dvc_remove,
1103         };
1104         int ret = 0, i;
1105 
1106         pm_runtime_disable(&pdev->dev);
1107 
1108         for_each_rsnd_dai(rdai, priv, i) {
1109                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1110                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1111         }
1112 
1113         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1114                 remove_func[i](pdev, priv);
1115 
1116         snd_soc_unregister_component(&pdev->dev);
1117         snd_soc_unregister_platform(&pdev->dev);
1118 
1119         return ret;
1120 }
1121 
1122 static struct platform_driver rsnd_driver = {
1123         .driver = {
1124                 .name   = "rcar_sound",
1125                 .of_match_table = rsnd_of_match,
1126         },
1127         .probe          = rsnd_probe,
1128         .remove         = rsnd_remove,
1129 };
1130 module_platform_driver(rsnd_driver);
1131 
1132 MODULE_LICENSE("GPL");
1133 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1134 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1135 MODULE_ALIAS("platform:rcar-pcm-audio");
1136 

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