Version:  2.0.40 2.2.26 2.4.37 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 3.16 3.17

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 char *rsnd_mod_dma_name(struct rsnd_mod *mod)
142 {
143         if (!mod || !mod->ops)
144                 return "unknown";
145 
146         if (!mod->ops->dma_name)
147                 return mod->ops->name;
148 
149         return mod->ops->dma_name(mod);
150 }
151 
152 void rsnd_mod_init(struct rsnd_priv *priv,
153                    struct rsnd_mod *mod,
154                    struct rsnd_mod_ops *ops,
155                    enum rsnd_mod_type type,
156                    int id)
157 {
158         mod->priv       = priv;
159         mod->id         = id;
160         mod->ops        = ops;
161         mod->type       = type;
162 }
163 
164 /*
165  *      rsnd_dma functions
166  */
167 void rsnd_dma_stop(struct rsnd_dma *dma)
168 {
169         dmaengine_terminate_all(dma->chan);
170 }
171 
172 static void rsnd_dma_complete(void *data)
173 {
174         struct rsnd_dma *dma = (struct rsnd_dma *)data;
175         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
176         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
177 
178         /*
179          * Renesas sound Gen1 needs 1 DMAC,
180          * Gen2 needs 2 DMAC.
181          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
182          * But, Audio-DMAC-peri-peri doesn't have interrupt,
183          * and this driver is assuming that here.
184          *
185          * If Audio-DMAC-peri-peri has interrpt,
186          * rsnd_dai_pointer_update() will be called twice,
187          * ant it will breaks io->byte_pos
188          */
189 
190         rsnd_dai_pointer_update(io, io->byte_per_period);
191 }
192 
193 void rsnd_dma_start(struct rsnd_dma *dma)
194 {
195         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
196         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
197         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
198         struct snd_pcm_substream *substream = io->substream;
199         struct device *dev = rsnd_priv_to_dev(priv);
200         struct dma_async_tx_descriptor *desc;
201 
202         desc = dmaengine_prep_dma_cyclic(dma->chan,
203                                          (dma->addr) ? dma->addr :
204                                          substream->runtime->dma_addr,
205                                          snd_pcm_lib_buffer_bytes(substream),
206                                          snd_pcm_lib_period_bytes(substream),
207                                          dma->dir,
208                                          DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
209 
210         if (!desc) {
211                 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
212                 return;
213         }
214 
215         desc->callback          = rsnd_dma_complete;
216         desc->callback_param    = dma;
217 
218         if (dmaengine_submit(desc) < 0) {
219                 dev_err(dev, "dmaengine_submit() fail\n");
220                 return;
221         }
222 
223         dma_async_issue_pending(dma->chan);
224 }
225 
226 int rsnd_dma_available(struct rsnd_dma *dma)
227 {
228         return !!dma->chan;
229 }
230 
231 #define DMA_NAME_SIZE 16
232 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
233 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
234 {
235         if (mod)
236                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
237                          rsnd_mod_dma_name(mod), rsnd_mod_id(mod));
238         else
239                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
240 
241 }
242 
243 static void rsnd_dma_of_name(struct rsnd_mod *mod_from,
244                              struct rsnd_mod *mod_to,
245                              char *dma_name)
246 {
247         int index = 0;
248 
249         index = _rsnd_dma_of_name(dma_name + index, mod_from);
250         *(dma_name + index++) = '_';
251         index = _rsnd_dma_of_name(dma_name + index, mod_to);
252 }
253 
254 static void rsnd_dma_of_path(struct rsnd_dma *dma,
255                              int is_play,
256                              struct rsnd_mod **mod_from,
257                              struct rsnd_mod **mod_to)
258 {
259         struct rsnd_mod *this = rsnd_dma_to_mod(dma);
260         struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
261         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
262         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
263         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
264         struct rsnd_mod *mod[MOD_MAX];
265         int i, index;
266 
267 
268         for (i = 0; i < MOD_MAX; i++)
269                 mod[i] = NULL;
270 
271         /*
272          * in play case...
273          *
274          * src -> dst
275          *
276          * mem -> SSI
277          * mem -> SRC -> SSI
278          * mem -> SRC -> DVC -> SSI
279          */
280         mod[0] = NULL; /* for "mem" */
281         index = 1;
282         for (i = 1; i < MOD_MAX; i++) {
283                 if (!src) {
284                         mod[i] = ssi;
285                 } else if (!dvc) {
286                         mod[i] = src;
287                         src = NULL;
288                 } else {
289                         if ((!is_play) && (this == src))
290                                 this = dvc;
291 
292                         mod[i] = (is_play) ? src : dvc;
293                         i++;
294                         mod[i] = (is_play) ? dvc : src;
295                         src = NULL;
296                         dvc = NULL;
297                 }
298 
299                 if (mod[i] == this)
300                         index = i;
301 
302                 if (mod[i] == ssi)
303                         break;
304         }
305 
306         if (is_play) {
307                 *mod_from = mod[index - 1];
308                 *mod_to   = mod[index];
309         } else {
310                 *mod_from = mod[index];
311                 *mod_to   = mod[index - 1];
312         }
313 }
314 
315 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
316                   int is_play, int id)
317 {
318         struct device *dev = rsnd_priv_to_dev(priv);
319         struct dma_slave_config cfg;
320         struct rsnd_mod *mod_from;
321         struct rsnd_mod *mod_to;
322         char dma_name[DMA_NAME_SIZE];
323         dma_cap_mask_t mask;
324         int ret;
325 
326         if (dma->chan) {
327                 dev_err(dev, "it already has dma channel\n");
328                 return -EIO;
329         }
330 
331         dma_cap_zero(mask);
332         dma_cap_set(DMA_SLAVE, mask);
333 
334         rsnd_dma_of_path(dma, is_play, &mod_from, &mod_to);
335         rsnd_dma_of_name(mod_from, mod_to, dma_name);
336 
337         cfg.slave_id    = id;
338         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
339         cfg.src_addr    = rsnd_gen_dma_addr(priv, mod_from, is_play, 1);
340         cfg.dst_addr    = rsnd_gen_dma_addr(priv, mod_to,   is_play, 0);
341         cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
342         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
343 
344         dev_dbg(dev, "dma : %s %pad -> %pad\n",
345                 dma_name, &cfg.src_addr, &cfg.dst_addr);
346 
347         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
348                                                      (void *)id, dev,
349                                                      dma_name);
350         if (!dma->chan) {
351                 dev_err(dev, "can't get dma channel\n");
352                 return -EIO;
353         }
354 
355         ret = dmaengine_slave_config(dma->chan, &cfg);
356         if (ret < 0)
357                 goto rsnd_dma_init_err;
358 
359         dma->addr = is_play ? cfg.src_addr : cfg.dst_addr;
360         dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
361 
362         return 0;
363 
364 rsnd_dma_init_err:
365         rsnd_dma_quit(priv, dma);
366 
367         return ret;
368 }
369 
370 void  rsnd_dma_quit(struct rsnd_priv *priv,
371                     struct rsnd_dma *dma)
372 {
373         if (dma->chan)
374                 dma_release_channel(dma->chan);
375 
376         dma->chan = NULL;
377 }
378 
379 /*
380  *      settting function
381  */
382 u32 rsnd_get_adinr(struct rsnd_mod *mod)
383 {
384         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
385         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
386         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
387         struct device *dev = rsnd_priv_to_dev(priv);
388         u32 adinr = runtime->channels;
389 
390         switch (runtime->sample_bits) {
391         case 16:
392                 adinr |= (8 << 16);
393                 break;
394         case 32:
395                 adinr |= (0 << 16);
396                 break;
397         default:
398                 dev_warn(dev, "not supported sample bits\n");
399                 return 0;
400         }
401 
402         return adinr;
403 }
404 
405 /*
406  *      rsnd_dai functions
407  */
408 #define __rsnd_mod_call(mod, func, rdai...)                     \
409 ({                                                              \
410         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
411         struct device *dev = rsnd_priv_to_dev(priv);            \
412         dev_dbg(dev, "%s [%d] %s\n",                            \
413                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
414         (mod)->ops->func(mod, rdai);                            \
415 })
416 
417 #define rsnd_mod_call(mod, func, rdai...)       \
418         (!(mod) ? -ENODEV :                     \
419          !((mod)->ops->func) ? 0 :              \
420          __rsnd_mod_call(mod, func, rdai))
421 
422 #define rsnd_dai_call(fn, io, rdai...)                          \
423 ({                                                              \
424         struct rsnd_mod *mod;                                   \
425         int ret = 0, i;                                         \
426         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
427                 mod = (io)->mod[i];                             \
428                 if (!mod)                                       \
429                         continue;                               \
430                 ret = rsnd_mod_call(mod, fn, rdai);             \
431                 if (ret < 0)                                    \
432                         break;                                  \
433         }                                                       \
434         ret;                                                    \
435 })
436 
437 static int rsnd_dai_connect(struct rsnd_mod *mod,
438                             struct rsnd_dai_stream *io)
439 {
440         if (!mod)
441                 return -EIO;
442 
443         if (io->mod[mod->type]) {
444                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
445                 struct device *dev = rsnd_priv_to_dev(priv);
446 
447                 dev_err(dev, "%s%d is not empty\n",
448                         rsnd_mod_name(mod),
449                         rsnd_mod_id(mod));
450                 return -EIO;
451         }
452 
453         io->mod[mod->type] = mod;
454         mod->io = io;
455 
456         return 0;
457 }
458 
459 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
460 {
461         int id = rdai - priv->rdai;
462 
463         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
464                 return -EINVAL;
465 
466         return id;
467 }
468 
469 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
470 {
471         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
472                 return NULL;
473 
474         return priv->rdai + id;
475 }
476 
477 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
478 {
479         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
480 
481         return rsnd_dai_get(priv, dai->id);
482 }
483 
484 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
485 {
486         return &rdai->playback == io;
487 }
488 
489 /*
490  *      rsnd_soc_dai functions
491  */
492 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
493 {
494         struct snd_pcm_substream *substream = io->substream;
495         struct snd_pcm_runtime *runtime = substream->runtime;
496         int pos = io->byte_pos + additional;
497 
498         pos %= (runtime->periods * io->byte_per_period);
499 
500         return pos;
501 }
502 
503 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
504 {
505         io->byte_pos += byte;
506 
507         if (io->byte_pos >= io->next_period_byte) {
508                 struct snd_pcm_substream *substream = io->substream;
509                 struct snd_pcm_runtime *runtime = substream->runtime;
510 
511                 io->period_pos++;
512                 io->next_period_byte += io->byte_per_period;
513 
514                 if (io->period_pos >= runtime->periods) {
515                         io->byte_pos = 0;
516                         io->period_pos = 0;
517                         io->next_period_byte = io->byte_per_period;
518                 }
519 
520                 snd_pcm_period_elapsed(substream);
521         }
522 }
523 
524 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
525                                 struct snd_pcm_substream *substream)
526 {
527         struct snd_pcm_runtime *runtime = substream->runtime;
528 
529         io->substream           = substream;
530         io->byte_pos            = 0;
531         io->period_pos          = 0;
532         io->byte_per_period     = runtime->period_size *
533                                   runtime->channels *
534                                   samples_to_bytes(runtime, 1);
535         io->next_period_byte    = io->byte_per_period;
536 
537         return 0;
538 }
539 
540 static
541 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
542 {
543         struct snd_soc_pcm_runtime *rtd = substream->private_data;
544 
545         return  rtd->cpu_dai;
546 }
547 
548 static
549 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
550                                         struct snd_pcm_substream *substream)
551 {
552         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
553                 return &rdai->playback;
554         else
555                 return &rdai->capture;
556 }
557 
558 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
559                             struct snd_soc_dai *dai)
560 {
561         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
562         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
563         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
564         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
565         int ret;
566         unsigned long flags;
567 
568         rsnd_lock(priv, flags);
569 
570         switch (cmd) {
571         case SNDRV_PCM_TRIGGER_START:
572                 ret = rsnd_dai_stream_init(io, substream);
573                 if (ret < 0)
574                         goto dai_trigger_end;
575 
576                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
577                 if (ret < 0)
578                         goto dai_trigger_end;
579 
580                 ret = rsnd_dai_call(init, io, rdai);
581                 if (ret < 0)
582                         goto dai_trigger_end;
583 
584                 ret = rsnd_dai_call(start, io, rdai);
585                 if (ret < 0)
586                         goto dai_trigger_end;
587                 break;
588         case SNDRV_PCM_TRIGGER_STOP:
589                 ret = rsnd_dai_call(stop, io, rdai);
590                 if (ret < 0)
591                         goto dai_trigger_end;
592 
593                 ret = rsnd_dai_call(quit, io, rdai);
594                 if (ret < 0)
595                         goto dai_trigger_end;
596 
597                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
598                 if (ret < 0)
599                         goto dai_trigger_end;
600                 break;
601         default:
602                 ret = -EINVAL;
603         }
604 
605 dai_trigger_end:
606         rsnd_unlock(priv, flags);
607 
608         return ret;
609 }
610 
611 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
612 {
613         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
614 
615         /* set master/slave audio interface */
616         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
617         case SND_SOC_DAIFMT_CBM_CFM:
618                 rdai->clk_master = 0;
619                 break;
620         case SND_SOC_DAIFMT_CBS_CFS:
621                 rdai->clk_master = 1; /* codec is slave, cpu is master */
622                 break;
623         default:
624                 return -EINVAL;
625         }
626 
627         /* set format */
628         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
629         case SND_SOC_DAIFMT_I2S:
630                 rdai->sys_delay = 0;
631                 rdai->data_alignment = 0;
632                 rdai->frm_clk_inv = 0;
633                 break;
634         case SND_SOC_DAIFMT_LEFT_J:
635                 rdai->sys_delay = 1;
636                 rdai->data_alignment = 0;
637                 rdai->frm_clk_inv = 1;
638                 break;
639         case SND_SOC_DAIFMT_RIGHT_J:
640                 rdai->sys_delay = 1;
641                 rdai->data_alignment = 1;
642                 rdai->frm_clk_inv = 1;
643                 break;
644         }
645 
646         /* set clock inversion */
647         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
648         case SND_SOC_DAIFMT_NB_IF:
649                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
650                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
651                 break;
652         case SND_SOC_DAIFMT_IB_NF:
653                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
654                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
655                 break;
656         case SND_SOC_DAIFMT_IB_IF:
657                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
658                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
659                 break;
660         case SND_SOC_DAIFMT_NB_NF:
661         default:
662                 break;
663         }
664 
665         return 0;
666 }
667 
668 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
669         .trigger        = rsnd_soc_dai_trigger,
670         .set_fmt        = rsnd_soc_dai_set_fmt,
671 };
672 
673 #define rsnd_path_parse(priv, io, type)                         \
674 ({                                                              \
675         struct rsnd_mod *mod;                                   \
676         int ret = 0;                                            \
677         int id = -1;                                            \
678                                                                 \
679         if (rsnd_is_enable_path(io, type)) {                    \
680                 id = rsnd_info_id(priv, io, type);              \
681                 if (id >= 0) {                                  \
682                         mod = rsnd_##type##_mod_get(priv, id);  \
683                         ret = rsnd_dai_connect(mod, io);        \
684                 }                                               \
685         }                                                       \
686         ret;                                                    \
687 })
688 
689 static int rsnd_path_init(struct rsnd_priv *priv,
690                           struct rsnd_dai *rdai,
691                           struct rsnd_dai_stream *io)
692 {
693         int ret;
694 
695         /*
696          * Gen1 is created by SRU/SSI, and this SRU is base module of
697          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
698          *
699          * Easy image is..
700          *      Gen1 SRU = Gen2 SCU + SSIU + etc
701          *
702          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
703          * using fixed path.
704          */
705 
706         /* SRC */
707         ret = rsnd_path_parse(priv, io, src);
708         if (ret < 0)
709                 return ret;
710 
711         /* SSI */
712         ret = rsnd_path_parse(priv, io, ssi);
713         if (ret < 0)
714                 return ret;
715 
716         /* DVC */
717         ret = rsnd_path_parse(priv, io, dvc);
718         if (ret < 0)
719                 return ret;
720 
721         return ret;
722 }
723 
724 static void rsnd_of_parse_dai(struct platform_device *pdev,
725                               const struct rsnd_of_data *of_data,
726                               struct rsnd_priv *priv)
727 {
728         struct device_node *dai_node,   *dai_np;
729         struct device_node *ssi_node,   *ssi_np;
730         struct device_node *src_node,   *src_np;
731         struct device_node *dvc_node,   *dvc_np;
732         struct device_node *playback, *capture;
733         struct rsnd_dai_platform_info *dai_info;
734         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
735         struct device *dev = &pdev->dev;
736         int nr, i;
737         int dai_i, ssi_i, src_i, dvc_i;
738 
739         if (!of_data)
740                 return;
741 
742         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
743         if (!dai_node)
744                 return;
745 
746         nr = of_get_child_count(dai_node);
747         if (!nr)
748                 return;
749 
750         dai_info = devm_kzalloc(dev,
751                                 sizeof(struct rsnd_dai_platform_info) * nr,
752                                 GFP_KERNEL);
753         if (!dai_info) {
754                 dev_err(dev, "dai info allocation error\n");
755                 return;
756         }
757 
758         info->dai_info_nr       = nr;
759         info->dai_info          = dai_info;
760 
761         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
762         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
763         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
764 
765 #define mod_parse(name)                                                 \
766 if (name##_node) {                                                      \
767         struct rsnd_##name##_platform_info *name##_info;                \
768                                                                         \
769         name##_i = 0;                                                   \
770         for_each_child_of_node(name##_node, name##_np) {                \
771                 name##_info = info->name##_info + name##_i;             \
772                                                                         \
773                 if (name##_np == playback)                              \
774                         dai_info->playback.name = name##_info;          \
775                 if (name##_np == capture)                               \
776                         dai_info->capture.name = name##_info;           \
777                                                                         \
778                 name##_i++;                                             \
779         }                                                               \
780 }
781 
782         /*
783          * parse all dai
784          */
785         dai_i = 0;
786         for_each_child_of_node(dai_node, dai_np) {
787                 dai_info = info->dai_info + dai_i;
788 
789                 for (i = 0;; i++) {
790 
791                         playback = of_parse_phandle(dai_np, "playback", i);
792                         capture  = of_parse_phandle(dai_np, "capture", i);
793 
794                         if (!playback && !capture)
795                                 break;
796 
797                         mod_parse(ssi);
798                         mod_parse(src);
799                         mod_parse(dvc);
800 
801                         if (playback)
802                                 of_node_put(playback);
803                         if (capture)
804                                 of_node_put(capture);
805                 }
806 
807                 dai_i++;
808         }
809 }
810 
811 static int rsnd_dai_probe(struct platform_device *pdev,
812                           const struct rsnd_of_data *of_data,
813                           struct rsnd_priv *priv)
814 {
815         struct snd_soc_dai_driver *drv;
816         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
817         struct rsnd_dai *rdai;
818         struct rsnd_ssi_platform_info *pmod, *cmod;
819         struct device *dev = rsnd_priv_to_dev(priv);
820         int dai_nr;
821         int i;
822 
823         rsnd_of_parse_dai(pdev, of_data, priv);
824 
825         dai_nr = info->dai_info_nr;
826         if (!dai_nr) {
827                 dev_err(dev, "no dai\n");
828                 return -EIO;
829         }
830 
831         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
832         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
833         if (!drv || !rdai) {
834                 dev_err(dev, "dai allocate failed\n");
835                 return -ENOMEM;
836         }
837 
838         priv->rdai_nr   = dai_nr;
839         priv->daidrv    = drv;
840         priv->rdai      = rdai;
841 
842         for (i = 0; i < dai_nr; i++) {
843                 rdai[i].info = &info->dai_info[i];
844 
845                 pmod = rdai[i].info->playback.ssi;
846                 cmod = rdai[i].info->capture.ssi;
847 
848                 /*
849                  *      init rsnd_dai
850                  */
851                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
852 
853                 /*
854                  *      init snd_soc_dai_driver
855                  */
856                 drv[i].name     = rdai[i].name;
857                 drv[i].ops      = &rsnd_soc_dai_ops;
858                 if (pmod) {
859                         drv[i].playback.rates           = RSND_RATES;
860                         drv[i].playback.formats         = RSND_FMTS;
861                         drv[i].playback.channels_min    = 2;
862                         drv[i].playback.channels_max    = 2;
863 
864                         rdai[i].playback.info = &info->dai_info[i].playback;
865                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
866                 }
867                 if (cmod) {
868                         drv[i].capture.rates            = RSND_RATES;
869                         drv[i].capture.formats          = RSND_FMTS;
870                         drv[i].capture.channels_min     = 2;
871                         drv[i].capture.channels_max     = 2;
872 
873                         rdai[i].capture.info = &info->dai_info[i].capture;
874                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
875                 }
876 
877                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
878                         pmod ? "play"    : " -- ",
879                         cmod ? "capture" : "  --   ");
880         }
881 
882         return 0;
883 }
884 
885 /*
886  *              pcm ops
887  */
888 static struct snd_pcm_hardware rsnd_pcm_hardware = {
889         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
890                         SNDRV_PCM_INFO_MMAP             |
891                         SNDRV_PCM_INFO_MMAP_VALID       |
892                         SNDRV_PCM_INFO_PAUSE,
893         .buffer_bytes_max       = 64 * 1024,
894         .period_bytes_min       = 32,
895         .period_bytes_max       = 8192,
896         .periods_min            = 1,
897         .periods_max            = 32,
898         .fifo_size              = 256,
899 };
900 
901 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
902 {
903         struct snd_pcm_runtime *runtime = substream->runtime;
904         int ret = 0;
905 
906         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
907 
908         ret = snd_pcm_hw_constraint_integer(runtime,
909                                             SNDRV_PCM_HW_PARAM_PERIODS);
910 
911         return ret;
912 }
913 
914 static int rsnd_hw_params(struct snd_pcm_substream *substream,
915                          struct snd_pcm_hw_params *hw_params)
916 {
917         return snd_pcm_lib_malloc_pages(substream,
918                                         params_buffer_bytes(hw_params));
919 }
920 
921 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
922 {
923         struct snd_pcm_runtime *runtime = substream->runtime;
924         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
925         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
926         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
927 
928         return bytes_to_frames(runtime, io->byte_pos);
929 }
930 
931 static struct snd_pcm_ops rsnd_pcm_ops = {
932         .open           = rsnd_pcm_open,
933         .ioctl          = snd_pcm_lib_ioctl,
934         .hw_params      = rsnd_hw_params,
935         .hw_free        = snd_pcm_lib_free_pages,
936         .pointer        = rsnd_pointer,
937 };
938 
939 /*
940  *              snd_soc_platform
941  */
942 
943 #define PREALLOC_BUFFER         (32 * 1024)
944 #define PREALLOC_BUFFER_MAX     (32 * 1024)
945 
946 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
947 {
948         struct snd_soc_dai *dai = rtd->cpu_dai;
949         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
950         int ret;
951 
952         ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
953         if (ret)
954                 return ret;
955 
956         ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
957         if (ret)
958                 return ret;
959 
960         return snd_pcm_lib_preallocate_pages_for_all(
961                 rtd->pcm,
962                 SNDRV_DMA_TYPE_DEV,
963                 rtd->card->snd_card->dev,
964                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
965 }
966 
967 static void rsnd_pcm_free(struct snd_pcm *pcm)
968 {
969         snd_pcm_lib_preallocate_free_for_all(pcm);
970 }
971 
972 static struct snd_soc_platform_driver rsnd_soc_platform = {
973         .ops            = &rsnd_pcm_ops,
974         .pcm_new        = rsnd_pcm_new,
975         .pcm_free       = rsnd_pcm_free,
976 };
977 
978 static const struct snd_soc_component_driver rsnd_soc_component = {
979         .name           = "rsnd",
980 };
981 
982 /*
983  *      rsnd probe
984  */
985 static int rsnd_probe(struct platform_device *pdev)
986 {
987         struct rcar_snd_info *info;
988         struct rsnd_priv *priv;
989         struct device *dev = &pdev->dev;
990         struct rsnd_dai *rdai;
991         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
992         const struct rsnd_of_data *of_data;
993         int (*probe_func[])(struct platform_device *pdev,
994                             const struct rsnd_of_data *of_data,
995                             struct rsnd_priv *priv) = {
996                 rsnd_gen_probe,
997                 rsnd_ssi_probe,
998                 rsnd_src_probe,
999                 rsnd_dvc_probe,
1000                 rsnd_adg_probe,
1001                 rsnd_dai_probe,
1002         };
1003         int ret, i;
1004 
1005         info = NULL;
1006         of_data = NULL;
1007         if (of_id) {
1008                 info = devm_kzalloc(&pdev->dev,
1009                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1010                 of_data = of_id->data;
1011         } else {
1012                 info = pdev->dev.platform_data;
1013         }
1014 
1015         if (!info) {
1016                 dev_err(dev, "driver needs R-Car sound information\n");
1017                 return -ENODEV;
1018         }
1019 
1020         /*
1021          *      init priv data
1022          */
1023         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1024         if (!priv) {
1025                 dev_err(dev, "priv allocate failed\n");
1026                 return -ENODEV;
1027         }
1028 
1029         priv->pdev      = pdev;
1030         priv->info      = info;
1031         spin_lock_init(&priv->lock);
1032 
1033         /*
1034          *      init each module
1035          */
1036         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1037                 ret = probe_func[i](pdev, of_data, priv);
1038                 if (ret)
1039                         return ret;
1040         }
1041 
1042         for_each_rsnd_dai(rdai, priv, i) {
1043                 ret = rsnd_dai_call(probe, &rdai->playback, rdai);
1044                 if (ret)
1045                         goto exit_snd_probe;
1046 
1047                 ret = rsnd_dai_call(probe, &rdai->capture, rdai);
1048                 if (ret)
1049                         goto exit_snd_probe;
1050         }
1051 
1052         /*
1053          *      asoc register
1054          */
1055         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1056         if (ret < 0) {
1057                 dev_err(dev, "cannot snd soc register\n");
1058                 return ret;
1059         }
1060 
1061         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1062                                          priv->daidrv, rsnd_rdai_nr(priv));
1063         if (ret < 0) {
1064                 dev_err(dev, "cannot snd dai register\n");
1065                 goto exit_snd_soc;
1066         }
1067 
1068         dev_set_drvdata(dev, priv);
1069 
1070         pm_runtime_enable(dev);
1071 
1072         dev_info(dev, "probed\n");
1073         return ret;
1074 
1075 exit_snd_soc:
1076         snd_soc_unregister_platform(dev);
1077 exit_snd_probe:
1078         for_each_rsnd_dai(rdai, priv, i) {
1079                 rsnd_dai_call(remove, &rdai->playback, rdai);
1080                 rsnd_dai_call(remove, &rdai->capture, rdai);
1081         }
1082 
1083         return ret;
1084 }
1085 
1086 static int rsnd_remove(struct platform_device *pdev)
1087 {
1088         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1089         struct rsnd_dai *rdai;
1090         int ret = 0, i;
1091 
1092         pm_runtime_disable(&pdev->dev);
1093 
1094         for_each_rsnd_dai(rdai, priv, i) {
1095                 ret |= rsnd_dai_call(remove, &rdai->playback, rdai);
1096                 ret |= rsnd_dai_call(remove, &rdai->capture, rdai);
1097         }
1098 
1099         return ret;
1100 }
1101 
1102 static struct platform_driver rsnd_driver = {
1103         .driver = {
1104                 .name   = "rcar_sound",
1105                 .of_match_table = rsnd_of_match,
1106         },
1107         .probe          = rsnd_probe,
1108         .remove         = rsnd_remove,
1109 };
1110 module_platform_driver(rsnd_driver);
1111 
1112 MODULE_LICENSE("GPL");
1113 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1114 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1115 MODULE_ALIAS("platform:rcar-pcm-audio");
1116 

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