Version:  2.0.40 2.2.26 2.4.37 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 4.0

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_mod *mod,
153                    struct rsnd_mod_ops *ops,
154                    struct clk *clk,
155                    enum rsnd_mod_type type,
156                    int id)
157 {
158         mod->id         = id;
159         mod->ops        = ops;
160         mod->type       = type;
161         mod->clk        = clk;
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, param...)                    \
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, param);                     \
426                 mod->status = (mod->status & ~mask) | (~call & mask);   \
427         }                                                               \
428         ret;                                                            \
429 })
430 
431 #define rsnd_mod_call(mod, func, param...)      \
432         (!(mod) ? -ENODEV :                     \
433          !((mod)->ops->func) ? 0 :              \
434          __rsnd_mod_call(mod, func, param))
435 
436 #define rsnd_dai_call(fn, io, param...)                         \
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, param);            \
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 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
481 {
482         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
483                 return NULL;
484 
485         return priv->rdai + id;
486 }
487 
488 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
489 {
490         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
491 
492         return rsnd_rdai_get(priv, dai->id);
493 }
494 
495 /*
496  *      rsnd_soc_dai functions
497  */
498 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
499 {
500         struct snd_pcm_substream *substream = io->substream;
501         struct snd_pcm_runtime *runtime = substream->runtime;
502         int pos = io->byte_pos + additional;
503 
504         pos %= (runtime->periods * io->byte_per_period);
505 
506         return pos;
507 }
508 
509 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
510 {
511         io->byte_pos += byte;
512 
513         if (io->byte_pos >= io->next_period_byte) {
514                 struct snd_pcm_substream *substream = io->substream;
515                 struct snd_pcm_runtime *runtime = substream->runtime;
516 
517                 io->period_pos++;
518                 io->next_period_byte += io->byte_per_period;
519 
520                 if (io->period_pos >= runtime->periods) {
521                         io->byte_pos = 0;
522                         io->period_pos = 0;
523                         io->next_period_byte = io->byte_per_period;
524                 }
525 
526                 snd_pcm_period_elapsed(substream);
527         }
528 }
529 
530 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
531                                 struct snd_pcm_substream *substream)
532 {
533         struct snd_pcm_runtime *runtime = substream->runtime;
534 
535         io->substream           = substream;
536         io->byte_pos            = 0;
537         io->period_pos          = 0;
538         io->byte_per_period     = runtime->period_size *
539                                   runtime->channels *
540                                   samples_to_bytes(runtime, 1);
541         io->next_period_byte    = io->byte_per_period;
542 
543         return 0;
544 }
545 
546 static
547 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
548 {
549         struct snd_soc_pcm_runtime *rtd = substream->private_data;
550 
551         return  rtd->cpu_dai;
552 }
553 
554 static
555 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
556                                         struct snd_pcm_substream *substream)
557 {
558         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
559                 return &rdai->playback;
560         else
561                 return &rdai->capture;
562 }
563 
564 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
565                             struct snd_soc_dai *dai)
566 {
567         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
568         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
569         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
570         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
571         int ret;
572         unsigned long flags;
573 
574         rsnd_lock(priv, flags);
575 
576         switch (cmd) {
577         case SNDRV_PCM_TRIGGER_START:
578                 ret = rsnd_dai_stream_init(io, substream);
579                 if (ret < 0)
580                         goto dai_trigger_end;
581 
582                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
583                 if (ret < 0)
584                         goto dai_trigger_end;
585 
586                 ret = rsnd_dai_call(init, io, priv);
587                 if (ret < 0)
588                         goto dai_trigger_end;
589 
590                 ret = rsnd_dai_call(start, io, priv);
591                 if (ret < 0)
592                         goto dai_trigger_end;
593                 break;
594         case SNDRV_PCM_TRIGGER_STOP:
595                 ret = rsnd_dai_call(stop, io, priv);
596                 if (ret < 0)
597                         goto dai_trigger_end;
598 
599                 ret = rsnd_dai_call(quit, io, priv);
600                 if (ret < 0)
601                         goto dai_trigger_end;
602 
603                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
604                 if (ret < 0)
605                         goto dai_trigger_end;
606                 break;
607         default:
608                 ret = -EINVAL;
609         }
610 
611 dai_trigger_end:
612         rsnd_unlock(priv, flags);
613 
614         return ret;
615 }
616 
617 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
618 {
619         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
620 
621         /* set master/slave audio interface */
622         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
623         case SND_SOC_DAIFMT_CBM_CFM:
624                 rdai->clk_master = 0;
625                 break;
626         case SND_SOC_DAIFMT_CBS_CFS:
627                 rdai->clk_master = 1; /* codec is slave, cpu is master */
628                 break;
629         default:
630                 return -EINVAL;
631         }
632 
633         /* set format */
634         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
635         case SND_SOC_DAIFMT_I2S:
636                 rdai->sys_delay = 0;
637                 rdai->data_alignment = 0;
638                 rdai->frm_clk_inv = 0;
639                 break;
640         case SND_SOC_DAIFMT_LEFT_J:
641                 rdai->sys_delay = 1;
642                 rdai->data_alignment = 0;
643                 rdai->frm_clk_inv = 1;
644                 break;
645         case SND_SOC_DAIFMT_RIGHT_J:
646                 rdai->sys_delay = 1;
647                 rdai->data_alignment = 1;
648                 rdai->frm_clk_inv = 1;
649                 break;
650         }
651 
652         /* set clock inversion */
653         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
654         case SND_SOC_DAIFMT_NB_IF:
655                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
656                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
657                 break;
658         case SND_SOC_DAIFMT_IB_NF:
659                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
660                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
661                 break;
662         case SND_SOC_DAIFMT_IB_IF:
663                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
664                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
665                 break;
666         case SND_SOC_DAIFMT_NB_NF:
667         default:
668                 break;
669         }
670 
671         return 0;
672 }
673 
674 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
675         .trigger        = rsnd_soc_dai_trigger,
676         .set_fmt        = rsnd_soc_dai_set_fmt,
677 };
678 
679 #define rsnd_path_parse(priv, io, type)                         \
680 ({                                                              \
681         struct rsnd_mod *mod;                                   \
682         int ret = 0;                                            \
683         int id = -1;                                            \
684                                                                 \
685         if (rsnd_is_enable_path(io, type)) {                    \
686                 id = rsnd_info_id(priv, io, type);              \
687                 if (id >= 0) {                                  \
688                         mod = rsnd_##type##_mod_get(priv, id);  \
689                         ret = rsnd_dai_connect(mod, io);        \
690                 }                                               \
691         }                                                       \
692         ret;                                                    \
693 })
694 
695 #define rsnd_path_break(priv, io, type)                         \
696 {                                                               \
697         struct rsnd_mod *mod;                                   \
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                         rsnd_dai_disconnect(mod, io);           \
705                 }                                               \
706         }                                                       \
707 }
708 
709 static int rsnd_path_init(struct rsnd_priv *priv,
710                           struct rsnd_dai *rdai,
711                           struct rsnd_dai_stream *io)
712 {
713         int ret;
714 
715         /*
716          * Gen1 is created by SRU/SSI, and this SRU is base module of
717          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
718          *
719          * Easy image is..
720          *      Gen1 SRU = Gen2 SCU + SSIU + etc
721          *
722          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
723          * using fixed path.
724          */
725 
726         /* SRC */
727         ret = rsnd_path_parse(priv, io, src);
728         if (ret < 0)
729                 return ret;
730 
731         /* SSI */
732         ret = rsnd_path_parse(priv, io, ssi);
733         if (ret < 0)
734                 return ret;
735 
736         /* DVC */
737         ret = rsnd_path_parse(priv, io, dvc);
738         if (ret < 0)
739                 return ret;
740 
741         return ret;
742 }
743 
744 static void rsnd_of_parse_dai(struct platform_device *pdev,
745                               const struct rsnd_of_data *of_data,
746                               struct rsnd_priv *priv)
747 {
748         struct device_node *dai_node,   *dai_np;
749         struct device_node *ssi_node,   *ssi_np;
750         struct device_node *src_node,   *src_np;
751         struct device_node *dvc_node,   *dvc_np;
752         struct device_node *playback, *capture;
753         struct rsnd_dai_platform_info *dai_info;
754         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
755         struct device *dev = &pdev->dev;
756         int nr, i;
757         int dai_i, ssi_i, src_i, dvc_i;
758 
759         if (!of_data)
760                 return;
761 
762         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
763         if (!dai_node)
764                 return;
765 
766         nr = of_get_child_count(dai_node);
767         if (!nr)
768                 return;
769 
770         dai_info = devm_kzalloc(dev,
771                                 sizeof(struct rsnd_dai_platform_info) * nr,
772                                 GFP_KERNEL);
773         if (!dai_info) {
774                 dev_err(dev, "dai info allocation error\n");
775                 return;
776         }
777 
778         info->dai_info_nr       = nr;
779         info->dai_info          = dai_info;
780 
781         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
782         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
783         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
784 
785 #define mod_parse(name)                                                 \
786 if (name##_node) {                                                      \
787         struct rsnd_##name##_platform_info *name##_info;                \
788                                                                         \
789         name##_i = 0;                                                   \
790         for_each_child_of_node(name##_node, name##_np) {                \
791                 name##_info = info->name##_info + name##_i;             \
792                                                                         \
793                 if (name##_np == playback)                              \
794                         dai_info->playback.name = name##_info;          \
795                 if (name##_np == capture)                               \
796                         dai_info->capture.name = name##_info;           \
797                                                                         \
798                 name##_i++;                                             \
799         }                                                               \
800 }
801 
802         /*
803          * parse all dai
804          */
805         dai_i = 0;
806         for_each_child_of_node(dai_node, dai_np) {
807                 dai_info = info->dai_info + dai_i;
808 
809                 for (i = 0;; i++) {
810 
811                         playback = of_parse_phandle(dai_np, "playback", i);
812                         capture  = of_parse_phandle(dai_np, "capture", i);
813 
814                         if (!playback && !capture)
815                                 break;
816 
817                         mod_parse(ssi);
818                         mod_parse(src);
819                         mod_parse(dvc);
820 
821                         of_node_put(playback);
822                         of_node_put(capture);
823                 }
824 
825                 dai_i++;
826         }
827 }
828 
829 static int rsnd_dai_probe(struct platform_device *pdev,
830                           const struct rsnd_of_data *of_data,
831                           struct rsnd_priv *priv)
832 {
833         struct snd_soc_dai_driver *drv;
834         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
835         struct rsnd_dai *rdai;
836         struct rsnd_ssi_platform_info *pmod, *cmod;
837         struct device *dev = rsnd_priv_to_dev(priv);
838         int dai_nr;
839         int i;
840 
841         rsnd_of_parse_dai(pdev, of_data, priv);
842 
843         dai_nr = info->dai_info_nr;
844         if (!dai_nr) {
845                 dev_err(dev, "no dai\n");
846                 return -EIO;
847         }
848 
849         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
850         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
851         if (!drv || !rdai) {
852                 dev_err(dev, "dai allocate failed\n");
853                 return -ENOMEM;
854         }
855 
856         priv->rdai_nr   = dai_nr;
857         priv->daidrv    = drv;
858         priv->rdai      = rdai;
859 
860         for (i = 0; i < dai_nr; i++) {
861 
862                 pmod = info->dai_info[i].playback.ssi;
863                 cmod = info->dai_info[i].capture.ssi;
864 
865                 /*
866                  *      init rsnd_dai
867                  */
868                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
869                 rdai[i].priv = priv;
870 
871                 /*
872                  *      init snd_soc_dai_driver
873                  */
874                 drv[i].name     = rdai[i].name;
875                 drv[i].ops      = &rsnd_soc_dai_ops;
876                 if (pmod) {
877                         drv[i].playback.rates           = RSND_RATES;
878                         drv[i].playback.formats         = RSND_FMTS;
879                         drv[i].playback.channels_min    = 2;
880                         drv[i].playback.channels_max    = 2;
881 
882                         rdai[i].playback.info = &info->dai_info[i].playback;
883                         rdai[i].playback.rdai = rdai + i;
884                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
885                 }
886                 if (cmod) {
887                         drv[i].capture.rates            = RSND_RATES;
888                         drv[i].capture.formats          = RSND_FMTS;
889                         drv[i].capture.channels_min     = 2;
890                         drv[i].capture.channels_max     = 2;
891 
892                         rdai[i].capture.info = &info->dai_info[i].capture;
893                         rdai[i].capture.rdai = rdai + i;
894                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
895                 }
896 
897                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
898                         pmod ? "play"    : " -- ",
899                         cmod ? "capture" : "  --   ");
900         }
901 
902         return 0;
903 }
904 
905 /*
906  *              pcm ops
907  */
908 static struct snd_pcm_hardware rsnd_pcm_hardware = {
909         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
910                         SNDRV_PCM_INFO_MMAP             |
911                         SNDRV_PCM_INFO_MMAP_VALID,
912         .buffer_bytes_max       = 64 * 1024,
913         .period_bytes_min       = 32,
914         .period_bytes_max       = 8192,
915         .periods_min            = 1,
916         .periods_max            = 32,
917         .fifo_size              = 256,
918 };
919 
920 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
921 {
922         struct snd_pcm_runtime *runtime = substream->runtime;
923         int ret = 0;
924 
925         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
926 
927         ret = snd_pcm_hw_constraint_integer(runtime,
928                                             SNDRV_PCM_HW_PARAM_PERIODS);
929 
930         return ret;
931 }
932 
933 static int rsnd_hw_params(struct snd_pcm_substream *substream,
934                          struct snd_pcm_hw_params *hw_params)
935 {
936         return snd_pcm_lib_malloc_pages(substream,
937                                         params_buffer_bytes(hw_params));
938 }
939 
940 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
941 {
942         struct snd_pcm_runtime *runtime = substream->runtime;
943         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
944         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
945         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
946 
947         return bytes_to_frames(runtime, io->byte_pos);
948 }
949 
950 static struct snd_pcm_ops rsnd_pcm_ops = {
951         .open           = rsnd_pcm_open,
952         .ioctl          = snd_pcm_lib_ioctl,
953         .hw_params      = rsnd_hw_params,
954         .hw_free        = snd_pcm_lib_free_pages,
955         .pointer        = rsnd_pointer,
956 };
957 
958 /*
959  *              snd_kcontrol
960  */
961 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
962 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
963                            struct snd_ctl_elem_info *uinfo)
964 {
965         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
966 
967         if (cfg->texts) {
968                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
969                 uinfo->count = cfg->size;
970                 uinfo->value.enumerated.items = cfg->max;
971                 if (uinfo->value.enumerated.item >= cfg->max)
972                         uinfo->value.enumerated.item = cfg->max - 1;
973                 strlcpy(uinfo->value.enumerated.name,
974                         cfg->texts[uinfo->value.enumerated.item],
975                         sizeof(uinfo->value.enumerated.name));
976         } else {
977                 uinfo->count = cfg->size;
978                 uinfo->value.integer.min = 0;
979                 uinfo->value.integer.max = cfg->max;
980                 uinfo->type = (cfg->max == 1) ?
981                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
982                         SNDRV_CTL_ELEM_TYPE_INTEGER;
983         }
984 
985         return 0;
986 }
987 
988 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
989                           struct snd_ctl_elem_value *uc)
990 {
991         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
992         int i;
993 
994         for (i = 0; i < cfg->size; i++)
995                 if (cfg->texts)
996                         uc->value.enumerated.item[i] = cfg->val[i];
997                 else
998                         uc->value.integer.value[i] = cfg->val[i];
999 
1000         return 0;
1001 }
1002 
1003 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
1004                           struct snd_ctl_elem_value *uc)
1005 {
1006         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
1007         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1008         int i, change = 0;
1009 
1010         for (i = 0; i < cfg->size; i++) {
1011                 if (cfg->texts) {
1012                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
1013                         cfg->val[i] = uc->value.enumerated.item[i];
1014                 } else {
1015                         change |= (uc->value.integer.value[i] != cfg->val[i]);
1016                         cfg->val[i] = uc->value.integer.value[i];
1017                 }
1018         }
1019 
1020         if (change)
1021                 cfg->update(mod);
1022 
1023         return change;
1024 }
1025 
1026 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
1027                             struct snd_soc_pcm_runtime *rtd,
1028                             const unsigned char *name,
1029                             struct rsnd_kctrl_cfg *cfg,
1030                             void (*update)(struct rsnd_mod *mod))
1031 {
1032         struct snd_card *card = rtd->card->snd_card;
1033         struct snd_kcontrol *kctrl;
1034         struct snd_kcontrol_new knew = {
1035                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
1036                 .name           = name,
1037                 .info           = rsnd_kctrl_info,
1038                 .get            = rsnd_kctrl_get,
1039                 .put            = rsnd_kctrl_put,
1040                 .private_value  = (unsigned long)cfg,
1041         };
1042         int ret;
1043 
1044         kctrl = snd_ctl_new1(&knew, mod);
1045         if (!kctrl)
1046                 return -ENOMEM;
1047 
1048         ret = snd_ctl_add(card, kctrl);
1049         if (ret < 0) {
1050                 snd_ctl_free_one(kctrl);
1051                 return ret;
1052         }
1053 
1054         cfg->update = update;
1055         cfg->card = card;
1056         cfg->kctrl = kctrl;
1057 
1058         return 0;
1059 }
1060 
1061 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
1062 {
1063         snd_ctl_remove(cfg->card, cfg->kctrl);
1064 }
1065 
1066 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
1067                      struct snd_soc_pcm_runtime *rtd,
1068                      const unsigned char *name,
1069                      void (*update)(struct rsnd_mod *mod),
1070                      struct rsnd_kctrl_cfg_m *_cfg,
1071                      u32 max)
1072 {
1073         _cfg->cfg.max   = max;
1074         _cfg->cfg.size  = RSND_DVC_CHANNELS;
1075         _cfg->cfg.val   = _cfg->val;
1076         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
1077 }
1078 
1079 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
1080                      struct snd_soc_pcm_runtime *rtd,
1081                      const unsigned char *name,
1082                      void (*update)(struct rsnd_mod *mod),
1083                      struct rsnd_kctrl_cfg_s *_cfg,
1084                      u32 max)
1085 {
1086         _cfg->cfg.max   = max;
1087         _cfg->cfg.size  = 1;
1088         _cfg->cfg.val   = &_cfg->val;
1089         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
1090 }
1091 
1092 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1093                      struct snd_soc_pcm_runtime *rtd,
1094                      const unsigned char *name,
1095                      struct rsnd_kctrl_cfg_s *_cfg,
1096                      void (*update)(struct rsnd_mod *mod),
1097                      const char * const *texts,
1098                      u32 max)
1099 {
1100         _cfg->cfg.max   = max;
1101         _cfg->cfg.size  = 1;
1102         _cfg->cfg.val   = &_cfg->val;
1103         _cfg->cfg.texts = texts;
1104         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
1105 }
1106 
1107 /*
1108  *              snd_soc_platform
1109  */
1110 
1111 #define PREALLOC_BUFFER         (32 * 1024)
1112 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1113 
1114 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1115 {
1116         struct snd_soc_dai *dai = rtd->cpu_dai;
1117         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1118         int ret;
1119 
1120         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1121         if (ret)
1122                 return ret;
1123 
1124         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1125         if (ret)
1126                 return ret;
1127 
1128         return snd_pcm_lib_preallocate_pages_for_all(
1129                 rtd->pcm,
1130                 SNDRV_DMA_TYPE_DEV,
1131                 rtd->card->snd_card->dev,
1132                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1133 }
1134 
1135 static struct snd_soc_platform_driver rsnd_soc_platform = {
1136         .ops            = &rsnd_pcm_ops,
1137         .pcm_new        = rsnd_pcm_new,
1138 };
1139 
1140 static const struct snd_soc_component_driver rsnd_soc_component = {
1141         .name           = "rsnd",
1142 };
1143 
1144 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1145                                        struct rsnd_dai_stream *io)
1146 {
1147         int ret;
1148 
1149         ret = rsnd_dai_call(probe, io, priv);
1150         if (ret == -EAGAIN) {
1151                 /*
1152                  * Fallback to PIO mode
1153                  */
1154 
1155                 /*
1156                  * call "remove" for SSI/SRC/DVC
1157                  * SSI will be switch to PIO mode if it was DMA mode
1158                  * see
1159                  *      rsnd_dma_init()
1160                  *      rsnd_ssi_fallback()
1161                  */
1162                 rsnd_dai_call(remove, io, priv);
1163 
1164                 /*
1165                  * remove SRC/DVC from DAI,
1166                  */
1167                 rsnd_path_break(priv, io, src);
1168                 rsnd_path_break(priv, io, dvc);
1169 
1170                 /*
1171                  * fallback
1172                  */
1173                 rsnd_dai_call(fallback, io, priv);
1174 
1175                 /*
1176                  * retry to "probe".
1177                  * DAI has SSI which is PIO mode only now.
1178                  */
1179                 ret = rsnd_dai_call(probe, io, priv);
1180         }
1181 
1182         return ret;
1183 }
1184 
1185 /*
1186  *      rsnd probe
1187  */
1188 static int rsnd_probe(struct platform_device *pdev)
1189 {
1190         struct rcar_snd_info *info;
1191         struct rsnd_priv *priv;
1192         struct device *dev = &pdev->dev;
1193         struct rsnd_dai *rdai;
1194         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1195         const struct rsnd_of_data *of_data;
1196         int (*probe_func[])(struct platform_device *pdev,
1197                             const struct rsnd_of_data *of_data,
1198                             struct rsnd_priv *priv) = {
1199                 rsnd_gen_probe,
1200                 rsnd_ssi_probe,
1201                 rsnd_src_probe,
1202                 rsnd_dvc_probe,
1203                 rsnd_adg_probe,
1204                 rsnd_dai_probe,
1205         };
1206         int ret, i;
1207 
1208         info = NULL;
1209         of_data = NULL;
1210         if (of_id) {
1211                 info = devm_kzalloc(&pdev->dev,
1212                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1213                 of_data = of_id->data;
1214         } else {
1215                 info = pdev->dev.platform_data;
1216         }
1217 
1218         if (!info) {
1219                 dev_err(dev, "driver needs R-Car sound information\n");
1220                 return -ENODEV;
1221         }
1222 
1223         /*
1224          *      init priv data
1225          */
1226         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1227         if (!priv) {
1228                 dev_err(dev, "priv allocate failed\n");
1229                 return -ENODEV;
1230         }
1231 
1232         priv->pdev      = pdev;
1233         priv->info      = info;
1234         spin_lock_init(&priv->lock);
1235 
1236         /*
1237          *      init each module
1238          */
1239         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1240                 ret = probe_func[i](pdev, of_data, priv);
1241                 if (ret)
1242                         return ret;
1243         }
1244 
1245         for_each_rsnd_dai(rdai, priv, i) {
1246                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1247                 if (ret)
1248                         goto exit_snd_probe;
1249 
1250                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1251                 if (ret)
1252                         goto exit_snd_probe;
1253         }
1254 
1255         dev_set_drvdata(dev, priv);
1256 
1257         /*
1258          *      asoc register
1259          */
1260         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1261         if (ret < 0) {
1262                 dev_err(dev, "cannot snd soc register\n");
1263                 return ret;
1264         }
1265 
1266         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1267                                          priv->daidrv, rsnd_rdai_nr(priv));
1268         if (ret < 0) {
1269                 dev_err(dev, "cannot snd dai register\n");
1270                 goto exit_snd_soc;
1271         }
1272 
1273         pm_runtime_enable(dev);
1274 
1275         dev_info(dev, "probed\n");
1276         return ret;
1277 
1278 exit_snd_soc:
1279         snd_soc_unregister_platform(dev);
1280 exit_snd_probe:
1281         for_each_rsnd_dai(rdai, priv, i) {
1282                 rsnd_dai_call(remove, &rdai->playback, priv);
1283                 rsnd_dai_call(remove, &rdai->capture, priv);
1284         }
1285 
1286         return ret;
1287 }
1288 
1289 static int rsnd_remove(struct platform_device *pdev)
1290 {
1291         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1292         struct rsnd_dai *rdai;
1293         int ret = 0, i;
1294 
1295         pm_runtime_disable(&pdev->dev);
1296 
1297         for_each_rsnd_dai(rdai, priv, i) {
1298                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1299                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1300         }
1301 
1302         snd_soc_unregister_component(&pdev->dev);
1303         snd_soc_unregister_platform(&pdev->dev);
1304 
1305         return ret;
1306 }
1307 
1308 static struct platform_driver rsnd_driver = {
1309         .driver = {
1310                 .name   = "rcar_sound",
1311                 .of_match_table = rsnd_of_match,
1312         },
1313         .probe          = rsnd_probe,
1314         .remove         = rsnd_remove,
1315 };
1316 module_platform_driver(rsnd_driver);
1317 
1318 MODULE_LICENSE("GPL");
1319 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1320 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1321 MODULE_ALIAS("platform:rcar-pcm-audio");
1322 

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