Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

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

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