Version:  2.0.40 2.2.26 2.4.37 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 3.18 3.19

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                 goto rsnd_dma_channel_err;
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 rsnd_dma_channel_err:
367 
368         /*
369          * DMA failed. try to PIO mode
370          * see
371          *      rsnd_ssi_fallback()
372          *      rsnd_rdai_continuance_probe()
373          */
374         return -EAGAIN;
375 }
376 
377 void  rsnd_dma_quit(struct rsnd_priv *priv,
378                     struct rsnd_dma *dma)
379 {
380         if (dma->chan)
381                 dma_release_channel(dma->chan);
382 
383         dma->chan = NULL;
384 }
385 
386 /*
387  *      settting function
388  */
389 u32 rsnd_get_adinr(struct rsnd_mod *mod)
390 {
391         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
392         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
393         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
394         struct device *dev = rsnd_priv_to_dev(priv);
395         u32 adinr = runtime->channels;
396 
397         switch (runtime->sample_bits) {
398         case 16:
399                 adinr |= (8 << 16);
400                 break;
401         case 32:
402                 adinr |= (0 << 16);
403                 break;
404         default:
405                 dev_warn(dev, "not supported sample bits\n");
406                 return 0;
407         }
408 
409         return adinr;
410 }
411 
412 /*
413  *      rsnd_dai functions
414  */
415 #define __rsnd_mod_call(mod, func, rdai...)                     \
416 ({                                                              \
417         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
418         struct device *dev = rsnd_priv_to_dev(priv);            \
419         u32 mask = 1 << __rsnd_mod_shift_##func;                        \
420         u32 call = __rsnd_mod_call_##func << __rsnd_mod_shift_##func;   \
421         int ret = 0;                                                    \
422         if ((mod->status & mask) == call) {                             \
423                 dev_dbg(dev, "%s[%d] %s\n",                             \
424                         rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
425                 ret = (mod)->ops->func(mod, rdai);                      \
426                 mod->status = (mod->status & ~mask) | (~call & mask);   \
427         }                                                               \
428         ret;                                                            \
429 })
430 
431 #define rsnd_mod_call(mod, func, rdai...)       \
432         (!(mod) ? -ENODEV :                     \
433          !((mod)->ops->func) ? 0 :              \
434          __rsnd_mod_call(mod, func, rdai))
435 
436 #define rsnd_dai_call(fn, io, rdai...)                          \
437 ({                                                              \
438         struct rsnd_mod *mod;                                   \
439         int ret = 0, i;                                         \
440         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
441                 mod = (io)->mod[i];                             \
442                 if (!mod)                                       \
443                         continue;                               \
444                 ret = rsnd_mod_call(mod, fn, rdai);             \
445                 if (ret < 0)                                    \
446                         break;                                  \
447         }                                                       \
448         ret;                                                    \
449 })
450 
451 static int rsnd_dai_connect(struct rsnd_mod *mod,
452                             struct rsnd_dai_stream *io)
453 {
454         if (!mod)
455                 return -EIO;
456 
457         if (io->mod[mod->type]) {
458                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
459                 struct device *dev = rsnd_priv_to_dev(priv);
460 
461                 dev_err(dev, "%s%d is not empty\n",
462                         rsnd_mod_name(mod),
463                         rsnd_mod_id(mod));
464                 return -EIO;
465         }
466 
467         io->mod[mod->type] = mod;
468         mod->io = io;
469 
470         return 0;
471 }
472 
473 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
474                                 struct rsnd_dai_stream *io)
475 {
476         mod->io = NULL;
477         io->mod[mod->type] = NULL;
478 }
479 
480 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
481 {
482         int id = rdai - priv->rdai;
483 
484         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
485                 return -EINVAL;
486 
487         return id;
488 }
489 
490 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
491 {
492         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
493                 return NULL;
494 
495         return priv->rdai + id;
496 }
497 
498 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
499 {
500         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
501 
502         return rsnd_dai_get(priv, dai->id);
503 }
504 
505 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
506 {
507         return &rdai->playback == io;
508 }
509 
510 /*
511  *      rsnd_soc_dai functions
512  */
513 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
514 {
515         struct snd_pcm_substream *substream = io->substream;
516         struct snd_pcm_runtime *runtime = substream->runtime;
517         int pos = io->byte_pos + additional;
518 
519         pos %= (runtime->periods * io->byte_per_period);
520 
521         return pos;
522 }
523 
524 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
525 {
526         io->byte_pos += byte;
527 
528         if (io->byte_pos >= io->next_period_byte) {
529                 struct snd_pcm_substream *substream = io->substream;
530                 struct snd_pcm_runtime *runtime = substream->runtime;
531 
532                 io->period_pos++;
533                 io->next_period_byte += io->byte_per_period;
534 
535                 if (io->period_pos >= runtime->periods) {
536                         io->byte_pos = 0;
537                         io->period_pos = 0;
538                         io->next_period_byte = io->byte_per_period;
539                 }
540 
541                 snd_pcm_period_elapsed(substream);
542         }
543 }
544 
545 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
546                                 struct snd_pcm_substream *substream)
547 {
548         struct snd_pcm_runtime *runtime = substream->runtime;
549 
550         io->substream           = substream;
551         io->byte_pos            = 0;
552         io->period_pos          = 0;
553         io->byte_per_period     = runtime->period_size *
554                                   runtime->channels *
555                                   samples_to_bytes(runtime, 1);
556         io->next_period_byte    = io->byte_per_period;
557 
558         return 0;
559 }
560 
561 static
562 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
563 {
564         struct snd_soc_pcm_runtime *rtd = substream->private_data;
565 
566         return  rtd->cpu_dai;
567 }
568 
569 static
570 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
571                                         struct snd_pcm_substream *substream)
572 {
573         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
574                 return &rdai->playback;
575         else
576                 return &rdai->capture;
577 }
578 
579 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
580                             struct snd_soc_dai *dai)
581 {
582         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
583         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
584         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
585         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
586         int ret;
587         unsigned long flags;
588 
589         rsnd_lock(priv, flags);
590 
591         switch (cmd) {
592         case SNDRV_PCM_TRIGGER_START:
593                 ret = rsnd_dai_stream_init(io, substream);
594                 if (ret < 0)
595                         goto dai_trigger_end;
596 
597                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
598                 if (ret < 0)
599                         goto dai_trigger_end;
600 
601                 ret = rsnd_dai_call(init, io, rdai);
602                 if (ret < 0)
603                         goto dai_trigger_end;
604 
605                 ret = rsnd_dai_call(start, io, rdai);
606                 if (ret < 0)
607                         goto dai_trigger_end;
608                 break;
609         case SNDRV_PCM_TRIGGER_STOP:
610                 ret = rsnd_dai_call(stop, io, rdai);
611                 if (ret < 0)
612                         goto dai_trigger_end;
613 
614                 ret = rsnd_dai_call(quit, io, rdai);
615                 if (ret < 0)
616                         goto dai_trigger_end;
617 
618                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
619                 if (ret < 0)
620                         goto dai_trigger_end;
621                 break;
622         default:
623                 ret = -EINVAL;
624         }
625 
626 dai_trigger_end:
627         rsnd_unlock(priv, flags);
628 
629         return ret;
630 }
631 
632 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
633 {
634         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
635 
636         /* set master/slave audio interface */
637         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
638         case SND_SOC_DAIFMT_CBM_CFM:
639                 rdai->clk_master = 0;
640                 break;
641         case SND_SOC_DAIFMT_CBS_CFS:
642                 rdai->clk_master = 1; /* codec is slave, cpu is master */
643                 break;
644         default:
645                 return -EINVAL;
646         }
647 
648         /* set format */
649         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
650         case SND_SOC_DAIFMT_I2S:
651                 rdai->sys_delay = 0;
652                 rdai->data_alignment = 0;
653                 rdai->frm_clk_inv = 0;
654                 break;
655         case SND_SOC_DAIFMT_LEFT_J:
656                 rdai->sys_delay = 1;
657                 rdai->data_alignment = 0;
658                 rdai->frm_clk_inv = 1;
659                 break;
660         case SND_SOC_DAIFMT_RIGHT_J:
661                 rdai->sys_delay = 1;
662                 rdai->data_alignment = 1;
663                 rdai->frm_clk_inv = 1;
664                 break;
665         }
666 
667         /* set clock inversion */
668         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
669         case SND_SOC_DAIFMT_NB_IF:
670                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
671                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
672                 break;
673         case SND_SOC_DAIFMT_IB_NF:
674                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
675                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
676                 break;
677         case SND_SOC_DAIFMT_IB_IF:
678                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
679                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
680                 break;
681         case SND_SOC_DAIFMT_NB_NF:
682         default:
683                 break;
684         }
685 
686         return 0;
687 }
688 
689 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
690         .trigger        = rsnd_soc_dai_trigger,
691         .set_fmt        = rsnd_soc_dai_set_fmt,
692 };
693 
694 #define rsnd_path_parse(priv, io, type)                         \
695 ({                                                              \
696         struct rsnd_mod *mod;                                   \
697         int ret = 0;                                            \
698         int id = -1;                                            \
699                                                                 \
700         if (rsnd_is_enable_path(io, type)) {                    \
701                 id = rsnd_info_id(priv, io, type);              \
702                 if (id >= 0) {                                  \
703                         mod = rsnd_##type##_mod_get(priv, id);  \
704                         ret = rsnd_dai_connect(mod, io);        \
705                 }                                               \
706         }                                                       \
707         ret;                                                    \
708 })
709 
710 #define rsnd_path_break(priv, io, type)                         \
711 {                                                               \
712         struct rsnd_mod *mod;                                   \
713         int id = -1;                                            \
714                                                                 \
715         if (rsnd_is_enable_path(io, type)) {                    \
716                 id = rsnd_info_id(priv, io, type);              \
717                 if (id >= 0) {                                  \
718                         mod = rsnd_##type##_mod_get(priv, id);  \
719                         rsnd_dai_disconnect(mod, io);           \
720                 }                                               \
721         }                                                       \
722 }
723 
724 static int rsnd_path_init(struct rsnd_priv *priv,
725                           struct rsnd_dai *rdai,
726                           struct rsnd_dai_stream *io)
727 {
728         int ret;
729 
730         /*
731          * Gen1 is created by SRU/SSI, and this SRU is base module of
732          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
733          *
734          * Easy image is..
735          *      Gen1 SRU = Gen2 SCU + SSIU + etc
736          *
737          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
738          * using fixed path.
739          */
740 
741         /* SRC */
742         ret = rsnd_path_parse(priv, io, src);
743         if (ret < 0)
744                 return ret;
745 
746         /* SSI */
747         ret = rsnd_path_parse(priv, io, ssi);
748         if (ret < 0)
749                 return ret;
750 
751         /* DVC */
752         ret = rsnd_path_parse(priv, io, dvc);
753         if (ret < 0)
754                 return ret;
755 
756         return ret;
757 }
758 
759 static void rsnd_of_parse_dai(struct platform_device *pdev,
760                               const struct rsnd_of_data *of_data,
761                               struct rsnd_priv *priv)
762 {
763         struct device_node *dai_node,   *dai_np;
764         struct device_node *ssi_node,   *ssi_np;
765         struct device_node *src_node,   *src_np;
766         struct device_node *dvc_node,   *dvc_np;
767         struct device_node *playback, *capture;
768         struct rsnd_dai_platform_info *dai_info;
769         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
770         struct device *dev = &pdev->dev;
771         int nr, i;
772         int dai_i, ssi_i, src_i, dvc_i;
773 
774         if (!of_data)
775                 return;
776 
777         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
778         if (!dai_node)
779                 return;
780 
781         nr = of_get_child_count(dai_node);
782         if (!nr)
783                 return;
784 
785         dai_info = devm_kzalloc(dev,
786                                 sizeof(struct rsnd_dai_platform_info) * nr,
787                                 GFP_KERNEL);
788         if (!dai_info) {
789                 dev_err(dev, "dai info allocation error\n");
790                 return;
791         }
792 
793         info->dai_info_nr       = nr;
794         info->dai_info          = dai_info;
795 
796         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
797         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
798         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
799 
800 #define mod_parse(name)                                                 \
801 if (name##_node) {                                                      \
802         struct rsnd_##name##_platform_info *name##_info;                \
803                                                                         \
804         name##_i = 0;                                                   \
805         for_each_child_of_node(name##_node, name##_np) {                \
806                 name##_info = info->name##_info + name##_i;             \
807                                                                         \
808                 if (name##_np == playback)                              \
809                         dai_info->playback.name = name##_info;          \
810                 if (name##_np == capture)                               \
811                         dai_info->capture.name = name##_info;           \
812                                                                         \
813                 name##_i++;                                             \
814         }                                                               \
815 }
816 
817         /*
818          * parse all dai
819          */
820         dai_i = 0;
821         for_each_child_of_node(dai_node, dai_np) {
822                 dai_info = info->dai_info + dai_i;
823 
824                 for (i = 0;; i++) {
825 
826                         playback = of_parse_phandle(dai_np, "playback", i);
827                         capture  = of_parse_phandle(dai_np, "capture", i);
828 
829                         if (!playback && !capture)
830                                 break;
831 
832                         mod_parse(ssi);
833                         mod_parse(src);
834                         mod_parse(dvc);
835 
836                         of_node_put(playback);
837                         of_node_put(capture);
838                 }
839 
840                 dai_i++;
841         }
842 }
843 
844 static int rsnd_dai_probe(struct platform_device *pdev,
845                           const struct rsnd_of_data *of_data,
846                           struct rsnd_priv *priv)
847 {
848         struct snd_soc_dai_driver *drv;
849         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
850         struct rsnd_dai *rdai;
851         struct rsnd_ssi_platform_info *pmod, *cmod;
852         struct device *dev = rsnd_priv_to_dev(priv);
853         int dai_nr;
854         int i;
855 
856         rsnd_of_parse_dai(pdev, of_data, priv);
857 
858         dai_nr = info->dai_info_nr;
859         if (!dai_nr) {
860                 dev_err(dev, "no dai\n");
861                 return -EIO;
862         }
863 
864         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
865         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
866         if (!drv || !rdai) {
867                 dev_err(dev, "dai allocate failed\n");
868                 return -ENOMEM;
869         }
870 
871         priv->rdai_nr   = dai_nr;
872         priv->daidrv    = drv;
873         priv->rdai      = rdai;
874 
875         for (i = 0; i < dai_nr; i++) {
876                 rdai[i].info = &info->dai_info[i];
877 
878                 pmod = rdai[i].info->playback.ssi;
879                 cmod = rdai[i].info->capture.ssi;
880 
881                 /*
882                  *      init rsnd_dai
883                  */
884                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
885 
886                 /*
887                  *      init snd_soc_dai_driver
888                  */
889                 drv[i].name     = rdai[i].name;
890                 drv[i].ops      = &rsnd_soc_dai_ops;
891                 if (pmod) {
892                         drv[i].playback.rates           = RSND_RATES;
893                         drv[i].playback.formats         = RSND_FMTS;
894                         drv[i].playback.channels_min    = 2;
895                         drv[i].playback.channels_max    = 2;
896 
897                         rdai[i].playback.info = &info->dai_info[i].playback;
898                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
899                 }
900                 if (cmod) {
901                         drv[i].capture.rates            = RSND_RATES;
902                         drv[i].capture.formats          = RSND_FMTS;
903                         drv[i].capture.channels_min     = 2;
904                         drv[i].capture.channels_max     = 2;
905 
906                         rdai[i].capture.info = &info->dai_info[i].capture;
907                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
908                 }
909 
910                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
911                         pmod ? "play"    : " -- ",
912                         cmod ? "capture" : "  --   ");
913         }
914 
915         return 0;
916 }
917 
918 /*
919  *              pcm ops
920  */
921 static struct snd_pcm_hardware rsnd_pcm_hardware = {
922         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
923                         SNDRV_PCM_INFO_MMAP             |
924                         SNDRV_PCM_INFO_MMAP_VALID,
925         .buffer_bytes_max       = 64 * 1024,
926         .period_bytes_min       = 32,
927         .period_bytes_max       = 8192,
928         .periods_min            = 1,
929         .periods_max            = 32,
930         .fifo_size              = 256,
931 };
932 
933 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
934 {
935         struct snd_pcm_runtime *runtime = substream->runtime;
936         int ret = 0;
937 
938         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
939 
940         ret = snd_pcm_hw_constraint_integer(runtime,
941                                             SNDRV_PCM_HW_PARAM_PERIODS);
942 
943         return ret;
944 }
945 
946 static int rsnd_hw_params(struct snd_pcm_substream *substream,
947                          struct snd_pcm_hw_params *hw_params)
948 {
949         return snd_pcm_lib_malloc_pages(substream,
950                                         params_buffer_bytes(hw_params));
951 }
952 
953 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
954 {
955         struct snd_pcm_runtime *runtime = substream->runtime;
956         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
957         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
958         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
959 
960         return bytes_to_frames(runtime, io->byte_pos);
961 }
962 
963 static struct snd_pcm_ops rsnd_pcm_ops = {
964         .open           = rsnd_pcm_open,
965         .ioctl          = snd_pcm_lib_ioctl,
966         .hw_params      = rsnd_hw_params,
967         .hw_free        = snd_pcm_lib_free_pages,
968         .pointer        = rsnd_pointer,
969 };
970 
971 /*
972  *              snd_kcontrol
973  */
974 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
975 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
976                            struct snd_ctl_elem_info *uinfo)
977 {
978         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
979 
980         if (cfg->texts) {
981                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
982                 uinfo->count = cfg->size;
983                 uinfo->value.enumerated.items = cfg->max;
984                 if (uinfo->value.enumerated.item >= cfg->max)
985                         uinfo->value.enumerated.item = cfg->max - 1;
986                 strlcpy(uinfo->value.enumerated.name,
987                         cfg->texts[uinfo->value.enumerated.item],
988                         sizeof(uinfo->value.enumerated.name));
989         } else {
990                 uinfo->count = cfg->size;
991                 uinfo->value.integer.min = 0;
992                 uinfo->value.integer.max = cfg->max;
993                 uinfo->type = (cfg->max == 1) ?
994                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
995                         SNDRV_CTL_ELEM_TYPE_INTEGER;
996         }
997 
998         return 0;
999 }
1000 
1001 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
1002                           struct snd_ctl_elem_value *uc)
1003 {
1004         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1005         int i;
1006 
1007         for (i = 0; i < cfg->size; i++)
1008                 if (cfg->texts)
1009                         uc->value.enumerated.item[i] = cfg->val[i];
1010                 else
1011                         uc->value.integer.value[i] = cfg->val[i];
1012 
1013         return 0;
1014 }
1015 
1016 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
1017                           struct snd_ctl_elem_value *uc)
1018 {
1019         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
1020         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1021         int i, change = 0;
1022 
1023         for (i = 0; i < cfg->size; i++) {
1024                 if (cfg->texts) {
1025                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
1026                         cfg->val[i] = uc->value.enumerated.item[i];
1027                 } else {
1028                         change |= (uc->value.integer.value[i] != cfg->val[i]);
1029                         cfg->val[i] = uc->value.integer.value[i];
1030                 }
1031         }
1032 
1033         if (change)
1034                 cfg->update(mod);
1035 
1036         return change;
1037 }
1038 
1039 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
1040                             struct rsnd_dai *rdai,
1041                             struct snd_soc_pcm_runtime *rtd,
1042                             const unsigned char *name,
1043                             struct rsnd_kctrl_cfg *cfg,
1044                             void (*update)(struct rsnd_mod *mod))
1045 {
1046         struct snd_card *card = rtd->card->snd_card;
1047         struct snd_kcontrol *kctrl;
1048         struct snd_kcontrol_new knew = {
1049                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
1050                 .name           = name,
1051                 .info           = rsnd_kctrl_info,
1052                 .get            = rsnd_kctrl_get,
1053                 .put            = rsnd_kctrl_put,
1054                 .private_value  = (unsigned long)cfg,
1055         };
1056         int ret;
1057 
1058         kctrl = snd_ctl_new1(&knew, mod);
1059         if (!kctrl)
1060                 return -ENOMEM;
1061 
1062         ret = snd_ctl_add(card, kctrl);
1063         if (ret < 0)
1064                 return ret;
1065 
1066         cfg->update = update;
1067 
1068         return 0;
1069 }
1070 
1071 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
1072                      struct rsnd_dai *rdai,
1073                      struct snd_soc_pcm_runtime *rtd,
1074                      const unsigned char *name,
1075                      void (*update)(struct rsnd_mod *mod),
1076                      struct rsnd_kctrl_cfg_m *_cfg,
1077                      u32 max)
1078 {
1079         _cfg->cfg.max   = max;
1080         _cfg->cfg.size  = RSND_DVC_CHANNELS;
1081         _cfg->cfg.val   = _cfg->val;
1082         return __rsnd_kctrl_new(mod, rdai, rtd, name, &_cfg->cfg, update);
1083 }
1084 
1085 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
1086                      struct rsnd_dai *rdai,
1087                      struct snd_soc_pcm_runtime *rtd,
1088                      const unsigned char *name,
1089                      void (*update)(struct rsnd_mod *mod),
1090                      struct rsnd_kctrl_cfg_s *_cfg,
1091                      u32 max)
1092 {
1093         _cfg->cfg.max   = max;
1094         _cfg->cfg.size  = 1;
1095         _cfg->cfg.val   = &_cfg->val;
1096         return __rsnd_kctrl_new(mod, rdai, rtd, name, &_cfg->cfg, update);
1097 }
1098 
1099 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1100                      struct rsnd_dai *rdai,
1101                      struct snd_soc_pcm_runtime *rtd,
1102                      const unsigned char *name,
1103                      struct rsnd_kctrl_cfg_s *_cfg,
1104                      void (*update)(struct rsnd_mod *mod),
1105                      const char * const *texts,
1106                      u32 max)
1107 {
1108         _cfg->cfg.max   = max;
1109         _cfg->cfg.size  = 1;
1110         _cfg->cfg.val   = &_cfg->val;
1111         _cfg->cfg.texts = texts;
1112         return __rsnd_kctrl_new(mod, rdai, rtd, name, &_cfg->cfg, update);
1113 }
1114 
1115 /*
1116  *              snd_soc_platform
1117  */
1118 
1119 #define PREALLOC_BUFFER         (32 * 1024)
1120 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1121 
1122 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1123 {
1124         struct snd_soc_dai *dai = rtd->cpu_dai;
1125         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1126         int ret;
1127 
1128         ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
1129         if (ret)
1130                 return ret;
1131 
1132         ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
1133         if (ret)
1134                 return ret;
1135 
1136         return snd_pcm_lib_preallocate_pages_for_all(
1137                 rtd->pcm,
1138                 SNDRV_DMA_TYPE_DEV,
1139                 rtd->card->snd_card->dev,
1140                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1141 }
1142 
1143 static void rsnd_pcm_free(struct snd_pcm *pcm)
1144 {
1145         snd_pcm_lib_preallocate_free_for_all(pcm);
1146 }
1147 
1148 static struct snd_soc_platform_driver rsnd_soc_platform = {
1149         .ops            = &rsnd_pcm_ops,
1150         .pcm_new        = rsnd_pcm_new,
1151         .pcm_free       = rsnd_pcm_free,
1152 };
1153 
1154 static const struct snd_soc_component_driver rsnd_soc_component = {
1155         .name           = "rsnd",
1156 };
1157 
1158 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1159                                        struct rsnd_dai *rdai,
1160                                        int is_play)
1161 {
1162         struct rsnd_dai_stream *io = is_play ? &rdai->playback : &rdai->capture;
1163         int ret;
1164 
1165         ret = rsnd_dai_call(probe, io, rdai);
1166         if (ret == -EAGAIN) {
1167                 /*
1168                  * Fallback to PIO mode
1169                  */
1170 
1171                 /*
1172                  * call "remove" for SSI/SRC/DVC
1173                  * SSI will be switch to PIO mode if it was DMA mode
1174                  * see
1175                  *      rsnd_dma_init()
1176                  *      rsnd_ssi_fallback()
1177                  */
1178                 rsnd_dai_call(remove, io, rdai);
1179 
1180                 /*
1181                  * remove SRC/DVC from DAI,
1182                  */
1183                 rsnd_path_break(priv, io, src);
1184                 rsnd_path_break(priv, io, dvc);
1185 
1186                 /*
1187                  * fallback
1188                  */
1189                 rsnd_dai_call(fallback, io, rdai);
1190 
1191                 /*
1192                  * retry to "probe".
1193                  * DAI has SSI which is PIO mode only now.
1194                  */
1195                 ret = rsnd_dai_call(probe, io, rdai);
1196         }
1197 
1198         return ret;
1199 }
1200 
1201 /*
1202  *      rsnd probe
1203  */
1204 static int rsnd_probe(struct platform_device *pdev)
1205 {
1206         struct rcar_snd_info *info;
1207         struct rsnd_priv *priv;
1208         struct device *dev = &pdev->dev;
1209         struct rsnd_dai *rdai;
1210         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1211         const struct rsnd_of_data *of_data;
1212         int (*probe_func[])(struct platform_device *pdev,
1213                             const struct rsnd_of_data *of_data,
1214                             struct rsnd_priv *priv) = {
1215                 rsnd_gen_probe,
1216                 rsnd_ssi_probe,
1217                 rsnd_src_probe,
1218                 rsnd_dvc_probe,
1219                 rsnd_adg_probe,
1220                 rsnd_dai_probe,
1221         };
1222         int ret, i;
1223 
1224         info = NULL;
1225         of_data = NULL;
1226         if (of_id) {
1227                 info = devm_kzalloc(&pdev->dev,
1228                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1229                 of_data = of_id->data;
1230         } else {
1231                 info = pdev->dev.platform_data;
1232         }
1233 
1234         if (!info) {
1235                 dev_err(dev, "driver needs R-Car sound information\n");
1236                 return -ENODEV;
1237         }
1238 
1239         /*
1240          *      init priv data
1241          */
1242         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1243         if (!priv) {
1244                 dev_err(dev, "priv allocate failed\n");
1245                 return -ENODEV;
1246         }
1247 
1248         priv->pdev      = pdev;
1249         priv->info      = info;
1250         spin_lock_init(&priv->lock);
1251 
1252         /*
1253          *      init each module
1254          */
1255         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1256                 ret = probe_func[i](pdev, of_data, priv);
1257                 if (ret)
1258                         return ret;
1259         }
1260 
1261         for_each_rsnd_dai(rdai, priv, i) {
1262                 ret = rsnd_rdai_continuance_probe(priv, rdai, 1);
1263                 if (ret)
1264                         goto exit_snd_probe;
1265 
1266                 ret = rsnd_rdai_continuance_probe(priv, rdai, 0);
1267                 if (ret)
1268                         goto exit_snd_probe;
1269         }
1270 
1271         /*
1272          *      asoc register
1273          */
1274         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1275         if (ret < 0) {
1276                 dev_err(dev, "cannot snd soc register\n");
1277                 return ret;
1278         }
1279 
1280         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1281                                          priv->daidrv, rsnd_rdai_nr(priv));
1282         if (ret < 0) {
1283                 dev_err(dev, "cannot snd dai register\n");
1284                 goto exit_snd_soc;
1285         }
1286 
1287         dev_set_drvdata(dev, priv);
1288 
1289         pm_runtime_enable(dev);
1290 
1291         dev_info(dev, "probed\n");
1292         return ret;
1293 
1294 exit_snd_soc:
1295         snd_soc_unregister_platform(dev);
1296 exit_snd_probe:
1297         for_each_rsnd_dai(rdai, priv, i) {
1298                 rsnd_dai_call(remove, &rdai->playback, rdai);
1299                 rsnd_dai_call(remove, &rdai->capture, rdai);
1300         }
1301 
1302         return ret;
1303 }
1304 
1305 static int rsnd_remove(struct platform_device *pdev)
1306 {
1307         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1308         struct rsnd_dai *rdai;
1309         int ret = 0, i;
1310 
1311         pm_runtime_disable(&pdev->dev);
1312 
1313         for_each_rsnd_dai(rdai, priv, i) {
1314                 ret |= rsnd_dai_call(remove, &rdai->playback, rdai);
1315                 ret |= rsnd_dai_call(remove, &rdai->capture, rdai);
1316         }
1317 
1318         return ret;
1319 }
1320 
1321 static struct platform_driver rsnd_driver = {
1322         .driver = {
1323                 .name   = "rcar_sound",
1324                 .of_match_table = rsnd_of_match,
1325         },
1326         .probe          = rsnd_probe,
1327         .remove         = rsnd_remove,
1328 };
1329 module_platform_driver(rsnd_driver);
1330 
1331 MODULE_LICENSE("GPL");
1332 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1333 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1334 MODULE_ALIAS("platform:rcar-pcm-audio");
1335 

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