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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 scu
 77  *   |
 78  *   +- scu
 79  *      |
 80  *      +- scu[0]
 81  *      +- scu[1]
 82  *      +- scu[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 /*
104  *      rsnd_platform functions
105  */
106 #define rsnd_platform_call(priv, dai, func, param...)   \
107         (!(priv->info->func) ? 0 :              \
108          priv->info->func(param))
109 
110 /*
111  *      rsnd_mod functions
112  */
113 char *rsnd_mod_name(struct rsnd_mod *mod)
114 {
115         if (!mod || !mod->ops)
116                 return "unknown";
117 
118         return mod->ops->name;
119 }
120 
121 void rsnd_mod_init(struct rsnd_priv *priv,
122                    struct rsnd_mod *mod,
123                    struct rsnd_mod_ops *ops,
124                    int id)
125 {
126         mod->priv       = priv;
127         mod->id         = id;
128         mod->ops        = ops;
129         INIT_LIST_HEAD(&mod->list);
130 }
131 
132 /*
133  *      rsnd_dma functions
134  */
135 static void rsnd_dma_continue(struct rsnd_dma *dma)
136 {
137         /* push next A or B plane */
138         dma->submit_loop = 1;
139         schedule_work(&dma->work);
140 }
141 
142 void rsnd_dma_start(struct rsnd_dma *dma)
143 {
144         /* push both A and B plane*/
145         dma->submit_loop = 2;
146         schedule_work(&dma->work);
147 }
148 
149 void rsnd_dma_stop(struct rsnd_dma *dma)
150 {
151         dma->submit_loop = 0;
152         cancel_work_sync(&dma->work);
153         dmaengine_terminate_all(dma->chan);
154 }
155 
156 static void rsnd_dma_complete(void *data)
157 {
158         struct rsnd_dma *dma = (struct rsnd_dma *)data;
159         struct rsnd_priv *priv = dma->priv;
160         unsigned long flags;
161 
162         rsnd_lock(priv, flags);
163 
164         dma->complete(dma);
165 
166         if (dma->submit_loop)
167                 rsnd_dma_continue(dma);
168 
169         rsnd_unlock(priv, flags);
170 }
171 
172 static void rsnd_dma_do_work(struct work_struct *work)
173 {
174         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
175         struct rsnd_priv *priv = dma->priv;
176         struct device *dev = rsnd_priv_to_dev(priv);
177         struct dma_async_tx_descriptor *desc;
178         dma_addr_t buf;
179         size_t len;
180         int i;
181 
182         for (i = 0; i < dma->submit_loop; i++) {
183 
184                 if (dma->inquiry(dma, &buf, &len) < 0)
185                         return;
186 
187                 desc = dmaengine_prep_slave_single(
188                         dma->chan, buf, len, dma->dir,
189                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
190                 if (!desc) {
191                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
192                         return;
193                 }
194 
195                 desc->callback          = rsnd_dma_complete;
196                 desc->callback_param    = dma;
197 
198                 if (dmaengine_submit(desc) < 0) {
199                         dev_err(dev, "dmaengine_submit() fail\n");
200                         return;
201                 }
202 
203                 dma_async_issue_pending(dma->chan);
204         }
205 }
206 
207 int rsnd_dma_available(struct rsnd_dma *dma)
208 {
209         return !!dma->chan;
210 }
211 
212 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
213                   int is_play, int id,
214                   int (*inquiry)(struct rsnd_dma *dma,
215                                   dma_addr_t *buf, int *len),
216                   int (*complete)(struct rsnd_dma *dma))
217 {
218         struct device *dev = rsnd_priv_to_dev(priv);
219         struct dma_slave_config cfg;
220         dma_cap_mask_t mask;
221         int ret;
222 
223         if (dma->chan) {
224                 dev_err(dev, "it already has dma channel\n");
225                 return -EIO;
226         }
227 
228         dma_cap_zero(mask);
229         dma_cap_set(DMA_SLAVE, mask);
230 
231         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
232                                                      (void *)id, dev,
233                                                      is_play ? "tx" : "rx");
234         if (!dma->chan) {
235                 dev_err(dev, "can't get dma channel\n");
236                 return -EIO;
237         }
238 
239         cfg.slave_id    = id;
240         cfg.dst_addr    = 0; /* use default addr when playback */
241         cfg.src_addr    = 0; /* use default addr when capture */
242         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
243 
244         ret = dmaengine_slave_config(dma->chan, &cfg);
245         if (ret < 0)
246                 goto rsnd_dma_init_err;
247 
248         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
249         dma->priv = priv;
250         dma->inquiry = inquiry;
251         dma->complete = complete;
252         INIT_WORK(&dma->work, rsnd_dma_do_work);
253 
254         return 0;
255 
256 rsnd_dma_init_err:
257         rsnd_dma_quit(priv, dma);
258 
259         return ret;
260 }
261 
262 void  rsnd_dma_quit(struct rsnd_priv *priv,
263                     struct rsnd_dma *dma)
264 {
265         if (dma->chan)
266                 dma_release_channel(dma->chan);
267 
268         dma->chan = NULL;
269 }
270 
271 /*
272  *      rsnd_dai functions
273  */
274 #define rsnd_dai_call(rdai, io, fn)                     \
275 ({                                                      \
276         struct rsnd_mod *mod, *n;                       \
277         int ret = 0;                                    \
278         for_each_rsnd_mod(mod, n, io) {                 \
279                 ret = rsnd_mod_call(mod, fn, rdai, io); \
280                 if (ret < 0)                            \
281                         break;                          \
282         }                                               \
283         ret;                                            \
284 })
285 
286 int rsnd_dai_connect(struct rsnd_dai *rdai,
287                      struct rsnd_mod *mod,
288                      struct rsnd_dai_stream *io)
289 {
290         if (!mod)
291                 return -EIO;
292 
293         if (!list_empty(&mod->list)) {
294                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
295                 struct device *dev = rsnd_priv_to_dev(priv);
296 
297                 dev_err(dev, "%s%d is not empty\n",
298                         rsnd_mod_name(mod),
299                         rsnd_mod_id(mod));
300                 return -EIO;
301         }
302 
303         list_add_tail(&mod->list, &io->head);
304 
305         return 0;
306 }
307 
308 int rsnd_dai_disconnect(struct rsnd_mod *mod)
309 {
310         list_del_init(&mod->list);
311 
312         return 0;
313 }
314 
315 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
316 {
317         int id = rdai - priv->rdai;
318 
319         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
320                 return -EINVAL;
321 
322         return id;
323 }
324 
325 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
326 {
327         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
328                 return NULL;
329 
330         return priv->rdai + id;
331 }
332 
333 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
334 {
335         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
336 
337         return rsnd_dai_get(priv, dai->id);
338 }
339 
340 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
341 {
342         return &rdai->playback == io;
343 }
344 
345 /*
346  *      rsnd_soc_dai functions
347  */
348 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
349 {
350         struct snd_pcm_substream *substream = io->substream;
351         struct snd_pcm_runtime *runtime = substream->runtime;
352         int pos = io->byte_pos + additional;
353 
354         pos %= (runtime->periods * io->byte_per_period);
355 
356         return pos;
357 }
358 
359 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
360 {
361         io->byte_pos += byte;
362 
363         if (io->byte_pos >= io->next_period_byte) {
364                 struct snd_pcm_substream *substream = io->substream;
365                 struct snd_pcm_runtime *runtime = substream->runtime;
366 
367                 io->period_pos++;
368                 io->next_period_byte += io->byte_per_period;
369 
370                 if (io->period_pos >= runtime->periods) {
371                         io->byte_pos = 0;
372                         io->period_pos = 0;
373                         io->next_period_byte = io->byte_per_period;
374                 }
375 
376                 snd_pcm_period_elapsed(substream);
377         }
378 }
379 
380 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
381                                 struct snd_pcm_substream *substream)
382 {
383         struct snd_pcm_runtime *runtime = substream->runtime;
384 
385         if (!list_empty(&io->head))
386                 return -EIO;
387 
388         INIT_LIST_HEAD(&io->head);
389         io->substream           = substream;
390         io->byte_pos            = 0;
391         io->period_pos          = 0;
392         io->byte_per_period     = runtime->period_size *
393                                   runtime->channels *
394                                   samples_to_bytes(runtime, 1);
395         io->next_period_byte    = io->byte_per_period;
396 
397         return 0;
398 }
399 
400 static
401 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
402 {
403         struct snd_soc_pcm_runtime *rtd = substream->private_data;
404 
405         return  rtd->cpu_dai;
406 }
407 
408 static
409 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
410                                         struct snd_pcm_substream *substream)
411 {
412         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
413                 return &rdai->playback;
414         else
415                 return &rdai->capture;
416 }
417 
418 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
419                             struct snd_soc_dai *dai)
420 {
421         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
422         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
423         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
424         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
425                                                 rsnd_dai_id(priv, rdai),
426                                                 rsnd_dai_is_play(rdai, io));
427         int ssi_id = rsnd_mod_id(mod);
428         int ret;
429         unsigned long flags;
430 
431         rsnd_lock(priv, flags);
432 
433         switch (cmd) {
434         case SNDRV_PCM_TRIGGER_START:
435                 ret = rsnd_dai_stream_init(io, substream);
436                 if (ret < 0)
437                         goto dai_trigger_end;
438 
439                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
440                 if (ret < 0)
441                         goto dai_trigger_end;
442 
443                 ret = rsnd_gen_path_init(priv, rdai, io);
444                 if (ret < 0)
445                         goto dai_trigger_end;
446 
447                 ret = rsnd_dai_call(rdai, io, init);
448                 if (ret < 0)
449                         goto dai_trigger_end;
450 
451                 ret = rsnd_dai_call(rdai, io, start);
452                 if (ret < 0)
453                         goto dai_trigger_end;
454                 break;
455         case SNDRV_PCM_TRIGGER_STOP:
456                 ret = rsnd_dai_call(rdai, io, stop);
457                 if (ret < 0)
458                         goto dai_trigger_end;
459 
460                 ret = rsnd_dai_call(rdai, io, quit);
461                 if (ret < 0)
462                         goto dai_trigger_end;
463 
464                 ret = rsnd_gen_path_exit(priv, rdai, io);
465                 if (ret < 0)
466                         goto dai_trigger_end;
467 
468                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
469                 if (ret < 0)
470                         goto dai_trigger_end;
471                 break;
472         default:
473                 ret = -EINVAL;
474         }
475 
476 dai_trigger_end:
477         rsnd_unlock(priv, flags);
478 
479         return ret;
480 }
481 
482 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
483 {
484         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
485 
486         /* set master/slave audio interface */
487         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
488         case SND_SOC_DAIFMT_CBM_CFM:
489                 rdai->clk_master = 1;
490                 break;
491         case SND_SOC_DAIFMT_CBS_CFS:
492                 rdai->clk_master = 0;
493                 break;
494         default:
495                 return -EINVAL;
496         }
497 
498         /* set clock inversion */
499         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
500         case SND_SOC_DAIFMT_NB_IF:
501                 rdai->bit_clk_inv = 0;
502                 rdai->frm_clk_inv = 1;
503                 break;
504         case SND_SOC_DAIFMT_IB_NF:
505                 rdai->bit_clk_inv = 1;
506                 rdai->frm_clk_inv = 0;
507                 break;
508         case SND_SOC_DAIFMT_IB_IF:
509                 rdai->bit_clk_inv = 1;
510                 rdai->frm_clk_inv = 1;
511                 break;
512         case SND_SOC_DAIFMT_NB_NF:
513         default:
514                 rdai->bit_clk_inv = 0;
515                 rdai->frm_clk_inv = 0;
516                 break;
517         }
518 
519         /* set format */
520         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
521         case SND_SOC_DAIFMT_I2S:
522                 rdai->sys_delay = 0;
523                 rdai->data_alignment = 0;
524                 break;
525         case SND_SOC_DAIFMT_LEFT_J:
526                 rdai->sys_delay = 1;
527                 rdai->data_alignment = 0;
528                 break;
529         case SND_SOC_DAIFMT_RIGHT_J:
530                 rdai->sys_delay = 1;
531                 rdai->data_alignment = 1;
532                 break;
533         }
534 
535         return 0;
536 }
537 
538 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
539         .trigger        = rsnd_soc_dai_trigger,
540         .set_fmt        = rsnd_soc_dai_set_fmt,
541 };
542 
543 static int rsnd_dai_probe(struct platform_device *pdev,
544                           struct rcar_snd_info *info,
545                           struct rsnd_priv *priv)
546 {
547         struct snd_soc_dai_driver *drv;
548         struct rsnd_dai *rdai;
549         struct rsnd_mod *pmod, *cmod;
550         struct device *dev = rsnd_priv_to_dev(priv);
551         int dai_nr;
552         int i;
553 
554         /* get max dai nr */
555         for (dai_nr = 0; dai_nr < 32; dai_nr++) {
556                 pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
557                 cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
558 
559                 if (!pmod && !cmod)
560                         break;
561         }
562 
563         if (!dai_nr) {
564                 dev_err(dev, "no dai\n");
565                 return -EIO;
566         }
567 
568         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
569         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
570         if (!drv || !rdai) {
571                 dev_err(dev, "dai allocate failed\n");
572                 return -ENOMEM;
573         }
574 
575         for (i = 0; i < dai_nr; i++) {
576 
577                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
578                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
579 
580                 /*
581                  *      init rsnd_dai
582                  */
583                 INIT_LIST_HEAD(&rdai[i].playback.head);
584                 INIT_LIST_HEAD(&rdai[i].capture.head);
585 
586                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
587 
588                 /*
589                  *      init snd_soc_dai_driver
590                  */
591                 drv[i].name     = rdai[i].name;
592                 drv[i].ops      = &rsnd_soc_dai_ops;
593                 if (pmod) {
594                         drv[i].playback.rates           = RSND_RATES;
595                         drv[i].playback.formats         = RSND_FMTS;
596                         drv[i].playback.channels_min    = 2;
597                         drv[i].playback.channels_max    = 2;
598                 }
599                 if (cmod) {
600                         drv[i].capture.rates            = RSND_RATES;
601                         drv[i].capture.formats          = RSND_FMTS;
602                         drv[i].capture.channels_min     = 2;
603                         drv[i].capture.channels_max     = 2;
604                 }
605 
606                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
607                         pmod ? "play"    : " -- ",
608                         cmod ? "capture" : "  --   ");
609         }
610 
611         priv->dai_nr    = dai_nr;
612         priv->daidrv    = drv;
613         priv->rdai      = rdai;
614 
615         return 0;
616 }
617 
618 static void rsnd_dai_remove(struct platform_device *pdev,
619                           struct rsnd_priv *priv)
620 {
621 }
622 
623 /*
624  *              pcm ops
625  */
626 static struct snd_pcm_hardware rsnd_pcm_hardware = {
627         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
628                         SNDRV_PCM_INFO_MMAP             |
629                         SNDRV_PCM_INFO_MMAP_VALID       |
630                         SNDRV_PCM_INFO_PAUSE,
631         .buffer_bytes_max       = 64 * 1024,
632         .period_bytes_min       = 32,
633         .period_bytes_max       = 8192,
634         .periods_min            = 1,
635         .periods_max            = 32,
636         .fifo_size              = 256,
637 };
638 
639 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
640 {
641         struct snd_pcm_runtime *runtime = substream->runtime;
642         int ret = 0;
643 
644         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
645 
646         ret = snd_pcm_hw_constraint_integer(runtime,
647                                             SNDRV_PCM_HW_PARAM_PERIODS);
648 
649         return ret;
650 }
651 
652 static int rsnd_hw_params(struct snd_pcm_substream *substream,
653                          struct snd_pcm_hw_params *hw_params)
654 {
655         return snd_pcm_lib_malloc_pages(substream,
656                                         params_buffer_bytes(hw_params));
657 }
658 
659 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
660 {
661         struct snd_pcm_runtime *runtime = substream->runtime;
662         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
663         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
664         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
665 
666         return bytes_to_frames(runtime, io->byte_pos);
667 }
668 
669 static struct snd_pcm_ops rsnd_pcm_ops = {
670         .open           = rsnd_pcm_open,
671         .ioctl          = snd_pcm_lib_ioctl,
672         .hw_params      = rsnd_hw_params,
673         .hw_free        = snd_pcm_lib_free_pages,
674         .pointer        = rsnd_pointer,
675 };
676 
677 /*
678  *              snd_soc_platform
679  */
680 
681 #define PREALLOC_BUFFER         (32 * 1024)
682 #define PREALLOC_BUFFER_MAX     (32 * 1024)
683 
684 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
685 {
686         return snd_pcm_lib_preallocate_pages_for_all(
687                 rtd->pcm,
688                 SNDRV_DMA_TYPE_DEV,
689                 rtd->card->snd_card->dev,
690                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
691 }
692 
693 static void rsnd_pcm_free(struct snd_pcm *pcm)
694 {
695         snd_pcm_lib_preallocate_free_for_all(pcm);
696 }
697 
698 static struct snd_soc_platform_driver rsnd_soc_platform = {
699         .ops            = &rsnd_pcm_ops,
700         .pcm_new        = rsnd_pcm_new,
701         .pcm_free       = rsnd_pcm_free,
702 };
703 
704 static const struct snd_soc_component_driver rsnd_soc_component = {
705         .name           = "rsnd",
706 };
707 
708 /*
709  *      rsnd probe
710  */
711 static int rsnd_probe(struct platform_device *pdev)
712 {
713         struct rcar_snd_info *info;
714         struct rsnd_priv *priv;
715         struct device *dev = &pdev->dev;
716         int ret;
717 
718         info = pdev->dev.platform_data;
719         if (!info) {
720                 dev_err(dev, "driver needs R-Car sound information\n");
721                 return -ENODEV;
722         }
723 
724         /*
725          *      init priv data
726          */
727         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
728         if (!priv) {
729                 dev_err(dev, "priv allocate failed\n");
730                 return -ENODEV;
731         }
732 
733         priv->dev       = dev;
734         priv->info      = info;
735         spin_lock_init(&priv->lock);
736 
737         /*
738          *      init each module
739          */
740         ret = rsnd_gen_probe(pdev, info, priv);
741         if (ret < 0)
742                 return ret;
743 
744         ret = rsnd_scu_probe(pdev, info, priv);
745         if (ret < 0)
746                 return ret;
747 
748         ret = rsnd_adg_probe(pdev, info, priv);
749         if (ret < 0)
750                 return ret;
751 
752         ret = rsnd_ssi_probe(pdev, info, priv);
753         if (ret < 0)
754                 return ret;
755 
756         ret = rsnd_dai_probe(pdev, info, priv);
757         if (ret < 0)
758                 return ret;
759 
760         /*
761          *      asoc register
762          */
763         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
764         if (ret < 0) {
765                 dev_err(dev, "cannot snd soc register\n");
766                 return ret;
767         }
768 
769         ret = snd_soc_register_component(dev, &rsnd_soc_component,
770                                          priv->daidrv, rsnd_dai_nr(priv));
771         if (ret < 0) {
772                 dev_err(dev, "cannot snd dai register\n");
773                 goto exit_snd_soc;
774         }
775 
776         dev_set_drvdata(dev, priv);
777 
778         pm_runtime_enable(dev);
779 
780         dev_info(dev, "probed\n");
781         return ret;
782 
783 exit_snd_soc:
784         snd_soc_unregister_platform(dev);
785 
786         return ret;
787 }
788 
789 static int rsnd_remove(struct platform_device *pdev)
790 {
791         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
792 
793         pm_runtime_disable(&pdev->dev);
794 
795         /*
796          *      remove each module
797          */
798         rsnd_ssi_remove(pdev, priv);
799         rsnd_adg_remove(pdev, priv);
800         rsnd_scu_remove(pdev, priv);
801         rsnd_dai_remove(pdev, priv);
802         rsnd_gen_remove(pdev, priv);
803 
804         return 0;
805 }
806 
807 static struct platform_driver rsnd_driver = {
808         .driver = {
809                 .name   = "rcar_sound",
810         },
811         .probe          = rsnd_probe,
812         .remove         = rsnd_remove,
813 };
814 module_platform_driver(rsnd_driver);
815 
816 MODULE_LICENSE("GPL");
817 MODULE_DESCRIPTION("Renesas R-Car audio driver");
818 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
819 MODULE_ALIAS("platform:rcar-pcm-audio");
820 

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