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Linux/sound/soc/sh/rcar/core.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 //
  3 // Renesas R-Car SRU/SCU/SSIU/SSI support
  4 //
  5 // Copyright (C) 2013 Renesas Solutions Corp.
  6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
  7 //
  8 // Based on fsi.c
  9 // Kuninori Morimoto <morimoto.kuninori@renesas.com>
 10 
 11 /*
 12  * Renesas R-Car sound device structure
 13  *
 14  * Gen1
 15  *
 16  * SRU          : Sound Routing Unit
 17  *  - SRC       : Sampling Rate Converter
 18  *  - CMD
 19  *    - CTU     : Channel Count Conversion Unit
 20  *    - MIX     : Mixer
 21  *    - DVC     : Digital Volume and Mute Function
 22  *  - SSI       : Serial Sound Interface
 23  *
 24  * Gen2
 25  *
 26  * SCU          : Sampling Rate Converter Unit
 27  *  - SRC       : Sampling Rate Converter
 28  *  - CMD
 29  *   - CTU      : Channel Count Conversion Unit
 30  *   - MIX      : Mixer
 31  *   - DVC      : Digital Volume and Mute Function
 32  * SSIU         : Serial Sound Interface Unit
 33  *  - SSI       : Serial Sound Interface
 34  */
 35 
 36 /*
 37  *      driver data Image
 38  *
 39  * rsnd_priv
 40  *   |
 41  *   | ** this depends on Gen1/Gen2
 42  *   |
 43  *   +- gen
 44  *   |
 45  *   | ** these depend on data path
 46  *   | ** gen and platform data control it
 47  *   |
 48  *   +- rdai[0]
 49  *   |   |               sru     ssiu      ssi
 50  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
 51  *   |   |
 52  *   |   |               sru     ssiu      ssi
 53  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
 54  *   |
 55  *   +- rdai[1]
 56  *   |   |               sru     ssiu      ssi
 57  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
 58  *   |   |
 59  *   |   |               sru     ssiu      ssi
 60  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
 61  *   ...
 62  *   |
 63  *   | ** these control ssi
 64  *   |
 65  *   +- ssi
 66  *   |  |
 67  *   |  +- ssi[0]
 68  *   |  +- ssi[1]
 69  *   |  +- ssi[2]
 70  *   |  ...
 71  *   |
 72  *   | ** these control src
 73  *   |
 74  *   +- src
 75  *      |
 76  *      +- src[0]
 77  *      +- src[1]
 78  *      +- src[2]
 79  *      ...
 80  *
 81  *
 82  * for_each_rsnd_dai(xx, priv, xx)
 83  *  rdai[0] => rdai[1] => rdai[2] => ...
 84  *
 85  * for_each_rsnd_mod(xx, rdai, xx)
 86  *  [mod] => [mod] => [mod] => ...
 87  *
 88  * rsnd_dai_call(xxx, fn )
 89  *  [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
 90  *
 91  */
 92 
 93 /*
 94  * you can enable below define if you don't need
 95  * DAI status debug message when debugging
 96  * see rsnd_dbg_dai_call()
 97  *
 98  * #define RSND_DEBUG_NO_DAI_CALL 1
 99  */
100 
101 #include <linux/pm_runtime.h>
102 #include "rsnd.h"
103 
104 #define RSND_RATES SNDRV_PCM_RATE_8000_192000
105 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S8 |\
106                    SNDRV_PCM_FMTBIT_S16_LE |\
107                    SNDRV_PCM_FMTBIT_S24_LE)
108 
109 static const struct of_device_id rsnd_of_match[] = {
110         { .compatible = "renesas,rcar_sound-gen1", .data = (void *)RSND_GEN1 },
111         { .compatible = "renesas,rcar_sound-gen2", .data = (void *)RSND_GEN2 },
112         { .compatible = "renesas,rcar_sound-gen3", .data = (void *)RSND_GEN3 },
113         /* Special Handling */
114         { .compatible = "renesas,rcar_sound-r8a77990", .data = (void *)(RSND_GEN3 | RSND_SOC_E) },
115         {},
116 };
117 MODULE_DEVICE_TABLE(of, rsnd_of_match);
118 
119 /*
120  *      rsnd_mod functions
121  */
122 void rsnd_mod_make_sure(struct rsnd_mod *mod, enum rsnd_mod_type type)
123 {
124         if (mod->type != type) {
125                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
126                 struct device *dev = rsnd_priv_to_dev(priv);
127 
128                 dev_warn(dev, "%s is not your expected module\n",
129                          rsnd_mod_name(mod));
130         }
131 }
132 
133 struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
134                                   struct rsnd_mod *mod)
135 {
136         if (!mod || !mod->ops || !mod->ops->dma_req)
137                 return NULL;
138 
139         return mod->ops->dma_req(io, mod);
140 }
141 
142 #define MOD_NAME_NUM   5
143 #define MOD_NAME_SIZE 16
144 char *rsnd_mod_name(struct rsnd_mod *mod)
145 {
146         static char names[MOD_NAME_NUM][MOD_NAME_SIZE];
147         static int num;
148         char *name = names[num];
149 
150         num++;
151         if (num >= MOD_NAME_NUM)
152                 num = 0;
153 
154         /*
155          * Let's use same char to avoid pointlessness memory
156          * Thus, rsnd_mod_name() should be used immediately
157          * Don't keep pointer
158          */
159         if ((mod)->ops->id_sub) {
160                 snprintf(name, MOD_NAME_SIZE, "%s[%d%d]",
161                          mod->ops->name,
162                          rsnd_mod_id(mod),
163                          rsnd_mod_id_sub(mod));
164         } else {
165                 snprintf(name, MOD_NAME_SIZE, "%s[%d]",
166                          mod->ops->name,
167                          rsnd_mod_id(mod));
168         }
169 
170         return name;
171 }
172 
173 u32 *rsnd_mod_get_status(struct rsnd_mod *mod,
174                          struct rsnd_dai_stream *io,
175                          enum rsnd_mod_type type)
176 {
177         return &mod->status;
178 }
179 
180 int rsnd_mod_id_raw(struct rsnd_mod *mod)
181 {
182         return mod->id;
183 }
184 
185 int rsnd_mod_id(struct rsnd_mod *mod)
186 {
187         if ((mod)->ops->id)
188                 return (mod)->ops->id(mod);
189 
190         return rsnd_mod_id_raw(mod);
191 }
192 
193 int rsnd_mod_id_sub(struct rsnd_mod *mod)
194 {
195         if ((mod)->ops->id_sub)
196                 return (mod)->ops->id_sub(mod);
197 
198         return 0;
199 }
200 
201 int rsnd_mod_init(struct rsnd_priv *priv,
202                   struct rsnd_mod *mod,
203                   struct rsnd_mod_ops *ops,
204                   struct clk *clk,
205                   enum rsnd_mod_type type,
206                   int id)
207 {
208         int ret = clk_prepare(clk);
209 
210         if (ret)
211                 return ret;
212 
213         mod->id         = id;
214         mod->ops        = ops;
215         mod->type       = type;
216         mod->clk        = clk;
217         mod->priv       = priv;
218 
219         return ret;
220 }
221 
222 void rsnd_mod_quit(struct rsnd_mod *mod)
223 {
224         clk_unprepare(mod->clk);
225         mod->clk = NULL;
226 }
227 
228 void rsnd_mod_interrupt(struct rsnd_mod *mod,
229                         void (*callback)(struct rsnd_mod *mod,
230                                          struct rsnd_dai_stream *io))
231 {
232         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
233         struct rsnd_dai_stream *io;
234         struct rsnd_dai *rdai;
235         int i;
236 
237         for_each_rsnd_dai(rdai, priv, i) {
238                 io = &rdai->playback;
239                 if (mod == io->mod[mod->type])
240                         callback(mod, io);
241 
242                 io = &rdai->capture;
243                 if (mod == io->mod[mod->type])
244                         callback(mod, io);
245         }
246 }
247 
248 int rsnd_io_is_working(struct rsnd_dai_stream *io)
249 {
250         /* see rsnd_dai_stream_init/quit() */
251         if (io->substream)
252                 return snd_pcm_running(io->substream);
253 
254         return 0;
255 }
256 
257 int rsnd_runtime_channel_original_with_params(struct rsnd_dai_stream *io,
258                                               struct snd_pcm_hw_params *params)
259 {
260         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
261 
262         /*
263          * params will be added when refine
264          * see
265          *      __rsnd_soc_hw_rule_rate()
266          *      __rsnd_soc_hw_rule_channels()
267          */
268         if (params)
269                 return params_channels(params);
270         else
271                 return runtime->channels;
272 }
273 
274 int rsnd_runtime_channel_after_ctu_with_params(struct rsnd_dai_stream *io,
275                                                struct snd_pcm_hw_params *params)
276 {
277         int chan = rsnd_runtime_channel_original_with_params(io, params);
278         struct rsnd_mod *ctu_mod = rsnd_io_to_mod_ctu(io);
279 
280         if (ctu_mod) {
281                 u32 converted_chan = rsnd_io_converted_chan(io);
282 
283                 /*
284                  * !! Note !!
285                  *
286                  * converted_chan will be used for CTU,
287                  * or TDM Split mode.
288                  * User shouldn't use CTU with TDM Split mode.
289                  */
290                 if (rsnd_runtime_is_tdm_split(io)) {
291                         struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));
292 
293                         dev_err(dev, "CTU and TDM Split should be used\n");
294                 }
295 
296                 if (converted_chan)
297                         return converted_chan;
298         }
299 
300         return chan;
301 }
302 
303 int rsnd_channel_normalization(int chan)
304 {
305         if ((chan > 8) || (chan < 0))
306                 return 0;
307 
308         /* TDM Extend Mode needs 8ch */
309         if (chan == 6)
310                 chan = 8;
311 
312         return chan;
313 }
314 
315 int rsnd_runtime_channel_for_ssi_with_params(struct rsnd_dai_stream *io,
316                                              struct snd_pcm_hw_params *params)
317 {
318         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
319         int chan = rsnd_io_is_play(io) ?
320                 rsnd_runtime_channel_after_ctu_with_params(io, params) :
321                 rsnd_runtime_channel_original_with_params(io, params);
322 
323         /* Use Multi SSI */
324         if (rsnd_runtime_is_multi_ssi(io))
325                 chan /= rsnd_rdai_ssi_lane_get(rdai);
326 
327         return rsnd_channel_normalization(chan);
328 }
329 
330 int rsnd_runtime_is_multi_ssi(struct rsnd_dai_stream *io)
331 {
332         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
333         int lane = rsnd_rdai_ssi_lane_get(rdai);
334         int chan = rsnd_io_is_play(io) ?
335                 rsnd_runtime_channel_after_ctu(io) :
336                 rsnd_runtime_channel_original(io);
337 
338         return (chan > 2) && (lane > 1);
339 }
340 
341 int rsnd_runtime_is_tdm(struct rsnd_dai_stream *io)
342 {
343         return rsnd_runtime_channel_for_ssi(io) >= 6;
344 }
345 
346 int rsnd_runtime_is_tdm_split(struct rsnd_dai_stream *io)
347 {
348         return !!rsnd_flags_has(io, RSND_STREAM_TDM_SPLIT);
349 }
350 
351 /*
352  *      ADINR function
353  */
354 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
355 {
356         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
357         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
358         struct device *dev = rsnd_priv_to_dev(priv);
359 
360         switch (snd_pcm_format_width(runtime->format)) {
361         case 8:
362                 return 16 << 16;
363         case 16:
364                 return 8 << 16;
365         case 24:
366                 return 0 << 16;
367         }
368 
369         dev_warn(dev, "not supported sample bits\n");
370 
371         return 0;
372 }
373 
374 /*
375  *      DALIGN function
376  */
377 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
378 {
379         struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
380         struct rsnd_mod *target;
381         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
382 
383         /*
384          * *Hardware* L/R and *Software* L/R are inverted for 16bit data.
385          *          31..16 15...0
386          *      HW: [L ch] [R ch]
387          *      SW: [R ch] [L ch]
388          * We need to care about inversion timing to control
389          * Playback/Capture correctly.
390          * The point is [DVC] needs *Hardware* L/R, [MEM] needs *Software* L/R
391          *
392          * sL/R : software L/R
393          * hL/R : hardware L/R
394          * (*)  : conversion timing
395          *
396          * Playback
397          *           sL/R (*) hL/R     hL/R     hL/R      hL/R     hL/R
398          *      [MEM] -> [SRC] -> [DVC] -> [CMD] -> [SSIU] -> [SSI] -> codec
399          *
400          * Capture
401          *           hL/R     hL/R      hL/R     hL/R     hL/R (*) sL/R
402          *      codec -> [SSI] -> [SSIU] -> [SRC] -> [DVC] -> [CMD] -> [MEM]
403          */
404         if (rsnd_io_is_play(io)) {
405                 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
406 
407                 target = src ? src : ssiu;
408         } else {
409                 struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
410 
411                 target = cmd ? cmd : ssiu;
412         }
413 
414         /* Non target mod or non 16bit needs normal DALIGN */
415         if ((snd_pcm_format_width(runtime->format) != 16) ||
416             (mod != target))
417                 return 0x76543210;
418         /* Target mod needs inverted DALIGN when 16bit */
419         else
420                 return 0x67452301;
421 }
422 
423 u32 rsnd_get_busif_shift(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
424 {
425         enum rsnd_mod_type playback_mods[] = {
426                 RSND_MOD_SRC,
427                 RSND_MOD_CMD,
428                 RSND_MOD_SSIU,
429         };
430         enum rsnd_mod_type capture_mods[] = {
431                 RSND_MOD_CMD,
432                 RSND_MOD_SRC,
433                 RSND_MOD_SSIU,
434         };
435         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
436         struct rsnd_mod *tmod = NULL;
437         enum rsnd_mod_type *mods =
438                 rsnd_io_is_play(io) ?
439                 playback_mods : capture_mods;
440         int i;
441 
442         /*
443          * This is needed for 24bit data
444          * We need to shift 8bit
445          *
446          * Linux 24bit data is located as 0x00******
447          * HW    24bit data is located as 0x******00
448          *
449          */
450         if (snd_pcm_format_width(runtime->format) != 24)
451                 return 0;
452 
453         for (i = 0; i < ARRAY_SIZE(playback_mods); i++) {
454                 tmod = rsnd_io_to_mod(io, mods[i]);
455                 if (tmod)
456                         break;
457         }
458 
459         if (tmod != mod)
460                 return 0;
461 
462         if (rsnd_io_is_play(io))
463                 return  (0 << 20) | /* shift to Left */
464                         (8 << 16);  /* 8bit */
465         else
466                 return  (1 << 20) | /* shift to Right */
467                         (8 << 16);  /* 8bit */
468 }
469 
470 /*
471  *      rsnd_dai functions
472  */
473 struct rsnd_mod *rsnd_mod_next(int *iterator,
474                                struct rsnd_dai_stream *io,
475                                enum rsnd_mod_type *array,
476                                int array_size)
477 {
478         struct rsnd_mod *mod;
479         enum rsnd_mod_type type;
480         int max = array ? array_size : RSND_MOD_MAX;
481 
482         for (; *iterator < max; (*iterator)++) {
483                 type = (array) ? array[*iterator] : *iterator;
484                 mod = rsnd_io_to_mod(io, type);
485                 if (mod)
486                         return mod;
487         }
488 
489         return NULL;
490 }
491 
492 static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
493         {
494                 /* CAPTURE */
495                 RSND_MOD_AUDMAPP,
496                 RSND_MOD_AUDMA,
497                 RSND_MOD_DVC,
498                 RSND_MOD_MIX,
499                 RSND_MOD_CTU,
500                 RSND_MOD_CMD,
501                 RSND_MOD_SRC,
502                 RSND_MOD_SSIU,
503                 RSND_MOD_SSIM3,
504                 RSND_MOD_SSIM2,
505                 RSND_MOD_SSIM1,
506                 RSND_MOD_SSIP,
507                 RSND_MOD_SSI,
508         }, {
509                 /* PLAYBACK */
510                 RSND_MOD_AUDMAPP,
511                 RSND_MOD_AUDMA,
512                 RSND_MOD_SSIM3,
513                 RSND_MOD_SSIM2,
514                 RSND_MOD_SSIM1,
515                 RSND_MOD_SSIP,
516                 RSND_MOD_SSI,
517                 RSND_MOD_SSIU,
518                 RSND_MOD_DVC,
519                 RSND_MOD_MIX,
520                 RSND_MOD_CTU,
521                 RSND_MOD_CMD,
522                 RSND_MOD_SRC,
523         },
524 };
525 
526 static int rsnd_status_update(u32 *status,
527                               int shift, int add, int timing)
528 {
529         u32 mask        = 0xF << shift;
530         u8 val          = (*status >> shift) & 0xF;
531         u8 next_val     = (val + add) & 0xF;
532         int func_call   = (val == timing);
533 
534         if (next_val == 0xF) /* underflow case */
535                 func_call = 0;
536         else
537                 *status = (*status & ~mask) + (next_val << shift);
538 
539         return func_call;
540 }
541 
542 #define rsnd_dai_call(fn, io, param...)                                 \
543 ({                                                                      \
544         struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));     \
545         struct rsnd_mod *mod;                                           \
546         int is_play = rsnd_io_is_play(io);                              \
547         int ret = 0, i;                                                 \
548         enum rsnd_mod_type *types = rsnd_mod_sequence[is_play];         \
549         for_each_rsnd_mod_arrays(i, mod, io, types, RSND_MOD_MAX) {     \
550                 int tmp = 0;                                            \
551                 u32 *status = mod->ops->get_status(mod, io, types[i]);  \
552                 int func_call = rsnd_status_update(status,              \
553                                                 __rsnd_mod_shift_##fn,  \
554                                                 __rsnd_mod_add_##fn,    \
555                                                 __rsnd_mod_call_##fn);  \
556                 rsnd_dbg_dai_call(dev, "%s\t0x%08x %s\n",               \
557                         rsnd_mod_name(mod), *status,    \
558                         (func_call && (mod)->ops->fn) ? #fn : "");      \
559                 if (func_call && (mod)->ops->fn)                        \
560                         tmp = (mod)->ops->fn(mod, io, param);           \
561                 if (tmp && (tmp != -EPROBE_DEFER))                      \
562                         dev_err(dev, "%s : %s error %d\n",              \
563                                 rsnd_mod_name(mod), #fn, tmp);          \
564                 ret |= tmp;                                             \
565         }                                                               \
566         ret;                                                            \
567 })
568 
569 int rsnd_dai_connect(struct rsnd_mod *mod,
570                      struct rsnd_dai_stream *io,
571                      enum rsnd_mod_type type)
572 {
573         struct rsnd_priv *priv;
574         struct device *dev;
575 
576         if (!mod)
577                 return -EIO;
578 
579         if (io->mod[type] == mod)
580                 return 0;
581 
582         if (io->mod[type])
583                 return -EINVAL;
584 
585         priv = rsnd_mod_to_priv(mod);
586         dev = rsnd_priv_to_dev(priv);
587 
588         io->mod[type] = mod;
589 
590         dev_dbg(dev, "%s is connected to io (%s)\n",
591                 rsnd_mod_name(mod),
592                 rsnd_io_is_play(io) ? "Playback" : "Capture");
593 
594         return 0;
595 }
596 
597 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
598                                 struct rsnd_dai_stream *io,
599                                 enum rsnd_mod_type type)
600 {
601         io->mod[type] = NULL;
602 }
603 
604 int rsnd_rdai_channels_ctrl(struct rsnd_dai *rdai,
605                             int max_channels)
606 {
607         if (max_channels > 0)
608                 rdai->max_channels = max_channels;
609 
610         return rdai->max_channels;
611 }
612 
613 int rsnd_rdai_ssi_lane_ctrl(struct rsnd_dai *rdai,
614                             int ssi_lane)
615 {
616         if (ssi_lane > 0)
617                 rdai->ssi_lane = ssi_lane;
618 
619         return rdai->ssi_lane;
620 }
621 
622 int rsnd_rdai_width_ctrl(struct rsnd_dai *rdai, int width)
623 {
624         if (width > 0)
625                 rdai->chan_width = width;
626 
627         return rdai->chan_width;
628 }
629 
630 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
631 {
632         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
633                 return NULL;
634 
635         return priv->rdai + id;
636 }
637 
638 static struct snd_soc_dai_driver
639 *rsnd_daidrv_get(struct rsnd_priv *priv, int id)
640 {
641         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
642                 return NULL;
643 
644         return priv->daidrv + id;
645 }
646 
647 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
648 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
649 {
650         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
651 
652         return rsnd_rdai_get(priv, dai->id);
653 }
654 
655 /*
656  *      rsnd_soc_dai functions
657  */
658 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
659 {
660         struct snd_pcm_substream *substream = io->substream;
661 
662         /*
663          * this function should be called...
664          *
665          * - if rsnd_dai_pointer_update() returns true
666          * - without spin lock
667          */
668 
669         snd_pcm_period_elapsed(substream);
670 }
671 
672 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
673                                 struct snd_pcm_substream *substream)
674 {
675         io->substream           = substream;
676 }
677 
678 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
679 {
680         io->substream           = NULL;
681 }
682 
683 static
684 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
685 {
686         struct snd_soc_pcm_runtime *rtd = substream->private_data;
687 
688         return  rtd->cpu_dai;
689 }
690 
691 static
692 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
693                                         struct snd_pcm_substream *substream)
694 {
695         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
696                 return &rdai->playback;
697         else
698                 return &rdai->capture;
699 }
700 
701 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
702                             struct snd_soc_dai *dai)
703 {
704         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
705         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
706         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
707         int ret;
708         unsigned long flags;
709 
710         spin_lock_irqsave(&priv->lock, flags);
711 
712         switch (cmd) {
713         case SNDRV_PCM_TRIGGER_START:
714         case SNDRV_PCM_TRIGGER_RESUME:
715                 ret = rsnd_dai_call(init, io, priv);
716                 if (ret < 0)
717                         goto dai_trigger_end;
718 
719                 ret = rsnd_dai_call(start, io, priv);
720                 if (ret < 0)
721                         goto dai_trigger_end;
722 
723                 ret = rsnd_dai_call(irq, io, priv, 1);
724                 if (ret < 0)
725                         goto dai_trigger_end;
726 
727                 break;
728         case SNDRV_PCM_TRIGGER_STOP:
729         case SNDRV_PCM_TRIGGER_SUSPEND:
730                 ret = rsnd_dai_call(irq, io, priv, 0);
731 
732                 ret |= rsnd_dai_call(stop, io, priv);
733 
734                 ret |= rsnd_dai_call(quit, io, priv);
735 
736                 break;
737         default:
738                 ret = -EINVAL;
739         }
740 
741 dai_trigger_end:
742         spin_unlock_irqrestore(&priv->lock, flags);
743 
744         return ret;
745 }
746 
747 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
748 {
749         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
750 
751         /* set master/slave audio interface */
752         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
753         case SND_SOC_DAIFMT_CBM_CFM:
754                 rdai->clk_master = 0;
755                 break;
756         case SND_SOC_DAIFMT_CBS_CFS:
757                 rdai->clk_master = 1; /* codec is slave, cpu is master */
758                 break;
759         default:
760                 return -EINVAL;
761         }
762 
763         /* set format */
764         rdai->bit_clk_inv = 0;
765         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
766         case SND_SOC_DAIFMT_I2S:
767                 rdai->sys_delay = 0;
768                 rdai->data_alignment = 0;
769                 rdai->frm_clk_inv = 0;
770                 break;
771         case SND_SOC_DAIFMT_LEFT_J:
772         case SND_SOC_DAIFMT_DSP_B:
773                 rdai->sys_delay = 1;
774                 rdai->data_alignment = 0;
775                 rdai->frm_clk_inv = 1;
776                 break;
777         case SND_SOC_DAIFMT_RIGHT_J:
778                 rdai->sys_delay = 1;
779                 rdai->data_alignment = 1;
780                 rdai->frm_clk_inv = 1;
781                 break;
782         case SND_SOC_DAIFMT_DSP_A:
783                 rdai->sys_delay = 0;
784                 rdai->data_alignment = 0;
785                 rdai->frm_clk_inv = 1;
786                 break;
787         }
788 
789         /* set clock inversion */
790         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
791         case SND_SOC_DAIFMT_NB_IF:
792                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
793                 break;
794         case SND_SOC_DAIFMT_IB_NF:
795                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
796                 break;
797         case SND_SOC_DAIFMT_IB_IF:
798                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
799                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
800                 break;
801         case SND_SOC_DAIFMT_NB_NF:
802         default:
803                 break;
804         }
805 
806         return 0;
807 }
808 
809 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
810                                      u32 tx_mask, u32 rx_mask,
811                                      int slots, int slot_width)
812 {
813         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
814         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
815         struct device *dev = rsnd_priv_to_dev(priv);
816 
817         switch (slot_width) {
818         case 16:
819         case 24:
820         case 32:
821                 break;
822         default:
823                 /* use default */
824                 slot_width = 32;
825         }
826 
827         switch (slots) {
828         case 2:
829                 /* TDM Split Mode */
830         case 6:
831         case 8:
832                 /* TDM Extend Mode */
833                 rsnd_rdai_channels_set(rdai, slots);
834                 rsnd_rdai_ssi_lane_set(rdai, 1);
835                 rsnd_rdai_width_set(rdai, slot_width);
836                 break;
837         default:
838                 dev_err(dev, "unsupported TDM slots (%d)\n", slots);
839                 return -EINVAL;
840         }
841 
842         return 0;
843 }
844 
845 static unsigned int rsnd_soc_hw_channels_list[] = {
846         2, 6, 8,
847 };
848 
849 static unsigned int rsnd_soc_hw_rate_list[] = {
850           8000,
851          11025,
852          16000,
853          22050,
854          32000,
855          44100,
856          48000,
857          64000,
858          88200,
859          96000,
860         176400,
861         192000,
862 };
863 
864 static int rsnd_soc_hw_rule(struct rsnd_dai *rdai,
865                             unsigned int *list, int list_num,
866                             struct snd_interval *baseline, struct snd_interval *iv)
867 {
868         struct snd_interval p;
869         unsigned int rate;
870         int i;
871 
872         snd_interval_any(&p);
873         p.min = UINT_MAX;
874         p.max = 0;
875 
876         for (i = 0; i < list_num; i++) {
877 
878                 if (!snd_interval_test(iv, list[i]))
879                         continue;
880 
881                 rate = rsnd_ssi_clk_query(rdai,
882                                           baseline->min, list[i], NULL);
883                 if (rate > 0) {
884                         p.min = min(p.min, list[i]);
885                         p.max = max(p.max, list[i]);
886                 }
887 
888                 rate = rsnd_ssi_clk_query(rdai,
889                                           baseline->max, list[i], NULL);
890                 if (rate > 0) {
891                         p.min = min(p.min, list[i]);
892                         p.max = max(p.max, list[i]);
893                 }
894         }
895 
896         return snd_interval_refine(iv, &p);
897 }
898 
899 static int rsnd_soc_hw_rule_rate(struct snd_pcm_hw_params *params,
900                                  struct snd_pcm_hw_rule *rule)
901 {
902         struct snd_interval *ic_ = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
903         struct snd_interval *ir = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
904         struct snd_interval ic;
905         struct rsnd_dai_stream *io = rule->private;
906         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
907 
908         /*
909          * possible sampling rate limitation is same as
910          * 2ch if it supports multi ssi
911          * and same as 8ch if TDM 6ch (see rsnd_ssi_config_init())
912          */
913         ic = *ic_;
914         ic.min =
915         ic.max = rsnd_runtime_channel_for_ssi_with_params(io, params);
916 
917         return rsnd_soc_hw_rule(rdai, rsnd_soc_hw_rate_list,
918                                 ARRAY_SIZE(rsnd_soc_hw_rate_list),
919                                 &ic, ir);
920 }
921 
922 static int rsnd_soc_hw_rule_channels(struct snd_pcm_hw_params *params,
923                                      struct snd_pcm_hw_rule *rule)
924 {
925         struct snd_interval *ic_ = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
926         struct snd_interval *ir = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
927         struct snd_interval ic;
928         struct rsnd_dai_stream *io = rule->private;
929         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
930 
931         /*
932          * possible sampling rate limitation is same as
933          * 2ch if it supports multi ssi
934          * and same as 8ch if TDM 6ch (see rsnd_ssi_config_init())
935          */
936         ic = *ic_;
937         ic.min =
938         ic.max = rsnd_runtime_channel_for_ssi_with_params(io, params);
939 
940         return rsnd_soc_hw_rule(rdai, rsnd_soc_hw_channels_list,
941                                 ARRAY_SIZE(rsnd_soc_hw_channels_list),
942                                 ir, &ic);
943 }
944 
945 static const struct snd_pcm_hardware rsnd_pcm_hardware = {
946         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
947                         SNDRV_PCM_INFO_MMAP             |
948                         SNDRV_PCM_INFO_MMAP_VALID,
949         .buffer_bytes_max       = 64 * 1024,
950         .period_bytes_min       = 32,
951         .period_bytes_max       = 8192,
952         .periods_min            = 1,
953         .periods_max            = 32,
954         .fifo_size              = 256,
955 };
956 
957 static int rsnd_soc_dai_startup(struct snd_pcm_substream *substream,
958                                 struct snd_soc_dai *dai)
959 {
960         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
961         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
962         struct snd_pcm_hw_constraint_list *constraint = &rdai->constraint;
963         struct snd_pcm_runtime *runtime = substream->runtime;
964         unsigned int max_channels = rsnd_rdai_channels_get(rdai);
965         int i;
966 
967         rsnd_dai_stream_init(io, substream);
968 
969         /*
970          * Channel Limitation
971          * It depends on Platform design
972          */
973         constraint->list        = rsnd_soc_hw_channels_list;
974         constraint->count       = 0;
975         constraint->mask        = 0;
976 
977         for (i = 0; i < ARRAY_SIZE(rsnd_soc_hw_channels_list); i++) {
978                 if (rsnd_soc_hw_channels_list[i] > max_channels)
979                         break;
980                 constraint->count = i + 1;
981         }
982 
983         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
984 
985         snd_pcm_hw_constraint_list(runtime, 0,
986                                    SNDRV_PCM_HW_PARAM_CHANNELS, constraint);
987 
988         snd_pcm_hw_constraint_integer(runtime,
989                                       SNDRV_PCM_HW_PARAM_PERIODS);
990 
991         /*
992          * Sampling Rate / Channel Limitation
993          * It depends on Clock Master Mode
994          */
995         if (rsnd_rdai_is_clk_master(rdai)) {
996                 int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
997 
998                 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
999                                     rsnd_soc_hw_rule_rate,
1000                                     is_play ? &rdai->playback : &rdai->capture,
1001                                     SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1002                 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1003                                     rsnd_soc_hw_rule_channels,
1004                                     is_play ? &rdai->playback : &rdai->capture,
1005                                     SNDRV_PCM_HW_PARAM_RATE, -1);
1006         }
1007 
1008         return 0;
1009 }
1010 
1011 static void rsnd_soc_dai_shutdown(struct snd_pcm_substream *substream,
1012                                   struct snd_soc_dai *dai)
1013 {
1014         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1015         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
1016         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1017 
1018         /*
1019          * call rsnd_dai_call without spinlock
1020          */
1021         rsnd_dai_call(cleanup, io, priv);
1022 
1023         rsnd_dai_stream_quit(io);
1024 }
1025 
1026 static int rsnd_soc_dai_prepare(struct snd_pcm_substream *substream,
1027                                 struct snd_soc_dai *dai)
1028 {
1029         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
1030         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1031         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1032 
1033         return rsnd_dai_call(prepare, io, priv);
1034 }
1035 
1036 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
1037         .startup        = rsnd_soc_dai_startup,
1038         .shutdown       = rsnd_soc_dai_shutdown,
1039         .trigger        = rsnd_soc_dai_trigger,
1040         .set_fmt        = rsnd_soc_dai_set_fmt,
1041         .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
1042         .prepare        = rsnd_soc_dai_prepare,
1043 };
1044 
1045 static void rsnd_parse_tdm_split_mode(struct rsnd_priv *priv,
1046                                       struct rsnd_dai_stream *io,
1047                                       struct device_node *dai_np)
1048 {
1049         struct device *dev = rsnd_priv_to_dev(priv);
1050         struct device_node *ssiu_np = rsnd_ssiu_of_node(priv);
1051         struct device_node *np;
1052         int is_play = rsnd_io_is_play(io);
1053         int i, j;
1054 
1055         if (!ssiu_np)
1056                 return;
1057 
1058         /*
1059          * This driver assumes that it is TDM Split mode
1060          * if it includes ssiu node
1061          */
1062         for (i = 0;; i++) {
1063                 struct device_node *node = is_play ?
1064                         of_parse_phandle(dai_np, "playback", i) :
1065                         of_parse_phandle(dai_np, "capture",  i);
1066 
1067                 if (!node)
1068                         break;
1069 
1070                 j = 0;
1071                 for_each_child_of_node(ssiu_np, np) {
1072                         if (np == node) {
1073                                 rsnd_flags_set(io, RSND_STREAM_TDM_SPLIT);
1074                                 dev_dbg(dev, "%s is part of TDM Split\n", io->name);
1075                         }
1076                         j++;
1077                 }
1078 
1079         }
1080 }
1081 
1082 static void rsnd_parse_connect_simple(struct rsnd_priv *priv,
1083                                       struct rsnd_dai_stream *io,
1084                                       struct device_node *dai_np)
1085 {
1086         if (!rsnd_io_to_mod_ssi(io))
1087                 return;
1088 
1089         rsnd_parse_tdm_split_mode(priv, io, dai_np);
1090 }
1091 
1092 static void rsnd_parse_connect_graph(struct rsnd_priv *priv,
1093                                      struct rsnd_dai_stream *io,
1094                                      struct device_node *endpoint)
1095 {
1096         struct device *dev = rsnd_priv_to_dev(priv);
1097         struct device_node *remote_node = of_graph_get_remote_port_parent(endpoint);
1098 
1099         if (!rsnd_io_to_mod_ssi(io))
1100                 return;
1101 
1102         /* HDMI0 */
1103         if (strstr(remote_node->full_name, "hdmi@fead0000")) {
1104                 rsnd_flags_set(io, RSND_STREAM_HDMI0);
1105                 dev_dbg(dev, "%s connected to HDMI0\n", io->name);
1106         }
1107 
1108         /* HDMI1 */
1109         if (strstr(remote_node->full_name, "hdmi@feae0000")) {
1110                 rsnd_flags_set(io, RSND_STREAM_HDMI1);
1111                 dev_dbg(dev, "%s connected to HDMI1\n", io->name);
1112         }
1113 
1114         rsnd_parse_tdm_split_mode(priv, io, endpoint);
1115 }
1116 
1117 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
1118                 struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
1119                 struct device_node *node,
1120                 struct device_node *playback,
1121                 struct device_node *capture)
1122 {
1123         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
1124         struct device_node *np;
1125         struct rsnd_mod *mod;
1126         int i;
1127 
1128         if (!node)
1129                 return;
1130 
1131         i = 0;
1132         for_each_child_of_node(node, np) {
1133                 mod = mod_get(priv, i);
1134                 if (np == playback)
1135                         rsnd_dai_connect(mod, &rdai->playback, mod->type);
1136                 if (np == capture)
1137                         rsnd_dai_connect(mod, &rdai->capture, mod->type);
1138                 i++;
1139         }
1140 
1141         of_node_put(node);
1142 }
1143 
1144 static struct device_node *rsnd_dai_of_node(struct rsnd_priv *priv,
1145                                             int *is_graph)
1146 {
1147         struct device *dev = rsnd_priv_to_dev(priv);
1148         struct device_node *np = dev->of_node;
1149         struct device_node *dai_node;
1150         struct device_node *ret;
1151 
1152         *is_graph = 0;
1153 
1154         /*
1155          * parse both previous dai (= rcar_sound,dai), and
1156          * graph dai (= ports/port)
1157          */
1158         dai_node = of_get_child_by_name(np, RSND_NODE_DAI);
1159         if (dai_node) {
1160                 ret = dai_node;
1161                 goto of_node_compatible;
1162         }
1163 
1164         ret = np;
1165 
1166         dai_node = of_graph_get_next_endpoint(np, NULL);
1167         if (dai_node)
1168                 goto of_node_graph;
1169 
1170         return NULL;
1171 
1172 of_node_graph:
1173         *is_graph = 1;
1174 of_node_compatible:
1175         of_node_put(dai_node);
1176 
1177         return ret;
1178 }
1179 
1180 
1181 #define PREALLOC_BUFFER         (32 * 1024)
1182 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1183 
1184 static int rsnd_preallocate_pages(struct snd_soc_pcm_runtime *rtd,
1185                                   struct rsnd_dai_stream *io,
1186                                   int stream)
1187 {
1188         struct rsnd_priv *priv = rsnd_io_to_priv(io);
1189         struct device *dev = rsnd_priv_to_dev(priv);
1190         struct snd_pcm_substream *substream;
1191 
1192         /*
1193          * use Audio-DMAC dev if we can use IPMMU
1194          * see
1195          *      rsnd_dmaen_attach()
1196          */
1197         if (io->dmac_dev)
1198                 dev = io->dmac_dev;
1199 
1200         for (substream = rtd->pcm->streams[stream].substream;
1201              substream;
1202              substream = substream->next) {
1203                 snd_pcm_lib_preallocate_pages(substream,
1204                                               SNDRV_DMA_TYPE_DEV,
1205                                               dev,
1206                                               PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1207         }
1208 
1209         return 0;
1210 }
1211 
1212 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd,
1213                         struct snd_soc_dai *dai)
1214 {
1215         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1216         int ret;
1217 
1218         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1219         if (ret)
1220                 return ret;
1221 
1222         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1223         if (ret)
1224                 return ret;
1225 
1226         ret = rsnd_preallocate_pages(rtd, &rdai->playback,
1227                                      SNDRV_PCM_STREAM_PLAYBACK);
1228         if (ret)
1229                 return ret;
1230 
1231         ret = rsnd_preallocate_pages(rtd, &rdai->capture,
1232                                      SNDRV_PCM_STREAM_CAPTURE);
1233         if (ret)
1234                 return ret;
1235 
1236         return 0;
1237 }
1238 
1239 static void __rsnd_dai_probe(struct rsnd_priv *priv,
1240                              struct device_node *dai_np,
1241                              int dai_i)
1242 {
1243         struct device_node *playback, *capture;
1244         struct rsnd_dai_stream *io_playback;
1245         struct rsnd_dai_stream *io_capture;
1246         struct snd_soc_dai_driver *drv;
1247         struct rsnd_dai *rdai;
1248         struct device *dev = rsnd_priv_to_dev(priv);
1249         int io_i;
1250 
1251         rdai            = rsnd_rdai_get(priv, dai_i);
1252         drv             = rsnd_daidrv_get(priv, dai_i);
1253         io_playback     = &rdai->playback;
1254         io_capture      = &rdai->capture;
1255 
1256         snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
1257 
1258         rdai->priv      = priv;
1259         drv->name       = rdai->name;
1260         drv->ops        = &rsnd_soc_dai_ops;
1261         drv->pcm_new    = rsnd_pcm_new;
1262 
1263         snprintf(io_playback->name, RSND_DAI_NAME_SIZE,
1264                  "DAI%d Playback", dai_i);
1265         drv->playback.rates             = RSND_RATES;
1266         drv->playback.formats           = RSND_FMTS;
1267         drv->playback.channels_min      = 2;
1268         drv->playback.channels_max      = 8;
1269         drv->playback.stream_name       = io_playback->name;
1270 
1271         snprintf(io_capture->name, RSND_DAI_NAME_SIZE,
1272                  "DAI%d Capture", dai_i);
1273         drv->capture.rates              = RSND_RATES;
1274         drv->capture.formats            = RSND_FMTS;
1275         drv->capture.channels_min       = 2;
1276         drv->capture.channels_max       = 8;
1277         drv->capture.stream_name        = io_capture->name;
1278 
1279         io_playback->rdai               = rdai;
1280         io_capture->rdai                = rdai;
1281         rsnd_rdai_channels_set(rdai, 2); /* default 2ch */
1282         rsnd_rdai_ssi_lane_set(rdai, 1); /* default 1lane */
1283         rsnd_rdai_width_set(rdai, 32);   /* default 32bit width */
1284 
1285         for (io_i = 0;; io_i++) {
1286                 playback = of_parse_phandle(dai_np, "playback", io_i);
1287                 capture  = of_parse_phandle(dai_np, "capture", io_i);
1288 
1289                 if (!playback && !capture)
1290                         break;
1291 
1292                 rsnd_parse_connect_ssi(rdai, playback, capture);
1293                 rsnd_parse_connect_ssiu(rdai, playback, capture);
1294                 rsnd_parse_connect_src(rdai, playback, capture);
1295                 rsnd_parse_connect_ctu(rdai, playback, capture);
1296                 rsnd_parse_connect_mix(rdai, playback, capture);
1297                 rsnd_parse_connect_dvc(rdai, playback, capture);
1298 
1299                 of_node_put(playback);
1300                 of_node_put(capture);
1301         }
1302 
1303         if (rsnd_ssi_is_pin_sharing(io_capture) ||
1304             rsnd_ssi_is_pin_sharing(io_playback)) {
1305                 /* should have symmetric_rates if pin sharing */
1306                 drv->symmetric_rates = 1;
1307         }
1308 
1309         dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
1310                 rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
1311                 rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
1312 }
1313 
1314 static int rsnd_dai_probe(struct rsnd_priv *priv)
1315 {
1316         struct device_node *dai_node;
1317         struct device_node *dai_np;
1318         struct snd_soc_dai_driver *rdrv;
1319         struct device *dev = rsnd_priv_to_dev(priv);
1320         struct rsnd_dai *rdai;
1321         int nr;
1322         int is_graph;
1323         int dai_i;
1324 
1325         dai_node = rsnd_dai_of_node(priv, &is_graph);
1326         if (is_graph)
1327                 nr = of_graph_get_endpoint_count(dai_node);
1328         else
1329                 nr = of_get_child_count(dai_node);
1330 
1331         if (!nr)
1332                 return -EINVAL;
1333 
1334         rdrv = devm_kcalloc(dev, nr, sizeof(*rdrv), GFP_KERNEL);
1335         rdai = devm_kcalloc(dev, nr, sizeof(*rdai), GFP_KERNEL);
1336         if (!rdrv || !rdai)
1337                 return -ENOMEM;
1338 
1339         priv->rdai_nr   = nr;
1340         priv->daidrv    = rdrv;
1341         priv->rdai      = rdai;
1342 
1343         /*
1344          * parse all dai
1345          */
1346         dai_i = 0;
1347         if (is_graph) {
1348                 for_each_endpoint_of_node(dai_node, dai_np) {
1349                         __rsnd_dai_probe(priv, dai_np, dai_i);
1350                         if (rsnd_is_gen3(priv)) {
1351                                 struct rsnd_dai *rdai = rsnd_rdai_get(priv, dai_i);
1352 
1353                                 rsnd_parse_connect_graph(priv, &rdai->playback, dai_np);
1354                                 rsnd_parse_connect_graph(priv, &rdai->capture,  dai_np);
1355                         }
1356                         dai_i++;
1357                 }
1358         } else {
1359                 for_each_child_of_node(dai_node, dai_np) {
1360                         __rsnd_dai_probe(priv, dai_np, dai_i);
1361                         if (rsnd_is_gen3(priv)) {
1362                                 struct rsnd_dai *rdai = rsnd_rdai_get(priv, dai_i);
1363 
1364                                 rsnd_parse_connect_simple(priv, &rdai->playback, dai_np);
1365                                 rsnd_parse_connect_simple(priv, &rdai->capture,  dai_np);
1366                         }
1367                         dai_i++;
1368                 }
1369         }
1370 
1371         return 0;
1372 }
1373 
1374 /*
1375  *              pcm ops
1376  */
1377 static int rsnd_hw_params(struct snd_pcm_substream *substream,
1378                          struct snd_pcm_hw_params *hw_params)
1379 {
1380         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
1381         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1382         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1383         struct snd_soc_pcm_runtime *fe = substream->private_data;
1384         int ret;
1385 
1386         /*
1387          * rsnd assumes that it might be used under DPCM if user want to use
1388          * channel / rate convert. Then, rsnd should be FE.
1389          * And then, this function will be called *after* BE settings.
1390          * this means, each BE already has fixuped hw_params.
1391          * see
1392          *      dpcm_fe_dai_hw_params()
1393          *      dpcm_be_dai_hw_params()
1394          */
1395         io->converted_rate = 0;
1396         io->converted_chan = 0;
1397         if (fe->dai_link->dynamic) {
1398                 struct rsnd_priv *priv = rsnd_io_to_priv(io);
1399                 struct device *dev = rsnd_priv_to_dev(priv);
1400                 struct snd_soc_dpcm *dpcm;
1401                 struct snd_pcm_hw_params *be_params;
1402                 int stream = substream->stream;
1403 
1404                 for_each_dpcm_be(fe, stream, dpcm) {
1405                         be_params = &dpcm->hw_params;
1406                         if (params_channels(hw_params) != params_channels(be_params))
1407                                 io->converted_chan = params_channels(be_params);
1408                         if (params_rate(hw_params) != params_rate(be_params))
1409                                 io->converted_rate = params_rate(be_params);
1410                 }
1411                 if (io->converted_chan)
1412                         dev_dbg(dev, "convert channels = %d\n", io->converted_chan);
1413                 if (io->converted_rate)
1414                         dev_dbg(dev, "convert rate     = %d\n", io->converted_rate);
1415         }
1416 
1417         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
1418         if (ret)
1419                 return ret;
1420 
1421         return snd_pcm_lib_malloc_pages(substream,
1422                                         params_buffer_bytes(hw_params));
1423 }
1424 
1425 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
1426 {
1427         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
1428         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1429         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
1430         snd_pcm_uframes_t pointer = 0;
1431 
1432         rsnd_dai_call(pointer, io, &pointer);
1433 
1434         return pointer;
1435 }
1436 
1437 static const struct snd_pcm_ops rsnd_pcm_ops = {
1438         .ioctl          = snd_pcm_lib_ioctl,
1439         .hw_params      = rsnd_hw_params,
1440         .hw_free        = snd_pcm_lib_free_pages,
1441         .pointer        = rsnd_pointer,
1442 };
1443 
1444 /*
1445  *              snd_kcontrol
1446  */
1447 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
1448                            struct snd_ctl_elem_info *uinfo)
1449 {
1450         struct rsnd_kctrl_cfg *cfg = snd_kcontrol_chip(kctrl);
1451 
1452         if (cfg->texts) {
1453                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1454                 uinfo->count = cfg->size;
1455                 uinfo->value.enumerated.items = cfg->max;
1456                 if (uinfo->value.enumerated.item >= cfg->max)
1457                         uinfo->value.enumerated.item = cfg->max - 1;
1458                 strlcpy(uinfo->value.enumerated.name,
1459                         cfg->texts[uinfo->value.enumerated.item],
1460                         sizeof(uinfo->value.enumerated.name));
1461         } else {
1462                 uinfo->count = cfg->size;
1463                 uinfo->value.integer.min = 0;
1464                 uinfo->value.integer.max = cfg->max;
1465                 uinfo->type = (cfg->max == 1) ?
1466                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
1467                         SNDRV_CTL_ELEM_TYPE_INTEGER;
1468         }
1469 
1470         return 0;
1471 }
1472 
1473 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
1474                           struct snd_ctl_elem_value *uc)
1475 {
1476         struct rsnd_kctrl_cfg *cfg = snd_kcontrol_chip(kctrl);
1477         int i;
1478 
1479         for (i = 0; i < cfg->size; i++)
1480                 if (cfg->texts)
1481                         uc->value.enumerated.item[i] = cfg->val[i];
1482                 else
1483                         uc->value.integer.value[i] = cfg->val[i];
1484 
1485         return 0;
1486 }
1487 
1488 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
1489                           struct snd_ctl_elem_value *uc)
1490 {
1491         struct rsnd_kctrl_cfg *cfg = snd_kcontrol_chip(kctrl);
1492         int i, change = 0;
1493 
1494         if (!cfg->accept(cfg->io))
1495                 return 0;
1496 
1497         for (i = 0; i < cfg->size; i++) {
1498                 if (cfg->texts) {
1499                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
1500                         cfg->val[i] = uc->value.enumerated.item[i];
1501                 } else {
1502                         change |= (uc->value.integer.value[i] != cfg->val[i]);
1503                         cfg->val[i] = uc->value.integer.value[i];
1504                 }
1505         }
1506 
1507         if (change && cfg->update)
1508                 cfg->update(cfg->io, cfg->mod);
1509 
1510         return change;
1511 }
1512 
1513 int rsnd_kctrl_accept_anytime(struct rsnd_dai_stream *io)
1514 {
1515         return 1;
1516 }
1517 
1518 int rsnd_kctrl_accept_runtime(struct rsnd_dai_stream *io)
1519 {
1520         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
1521         struct rsnd_priv *priv = rsnd_io_to_priv(io);
1522         struct device *dev = rsnd_priv_to_dev(priv);
1523 
1524         if (!runtime) {
1525                 dev_warn(dev, "Can't update kctrl when idle\n");
1526                 return 0;
1527         }
1528 
1529         return 1;
1530 }
1531 
1532 struct rsnd_kctrl_cfg *rsnd_kctrl_init_m(struct rsnd_kctrl_cfg_m *cfg)
1533 {
1534         cfg->cfg.val = cfg->val;
1535 
1536         return &cfg->cfg;
1537 }
1538 
1539 struct rsnd_kctrl_cfg *rsnd_kctrl_init_s(struct rsnd_kctrl_cfg_s *cfg)
1540 {
1541         cfg->cfg.val = &cfg->val;
1542 
1543         return &cfg->cfg;
1544 }
1545 
1546 const char * const volume_ramp_rate[] = {
1547         "128 dB/1 step",         /* 00000 */
1548         "64 dB/1 step",          /* 00001 */
1549         "32 dB/1 step",          /* 00010 */
1550         "16 dB/1 step",          /* 00011 */
1551         "8 dB/1 step",           /* 00100 */
1552         "4 dB/1 step",           /* 00101 */
1553         "2 dB/1 step",           /* 00110 */
1554         "1 dB/1 step",           /* 00111 */
1555         "0.5 dB/1 step",         /* 01000 */
1556         "0.25 dB/1 step",        /* 01001 */
1557         "0.125 dB/1 step",       /* 01010 = VOLUME_RAMP_MAX_MIX */
1558         "0.125 dB/2 steps",      /* 01011 */
1559         "0.125 dB/4 steps",      /* 01100 */
1560         "0.125 dB/8 steps",      /* 01101 */
1561         "0.125 dB/16 steps",     /* 01110 */
1562         "0.125 dB/32 steps",     /* 01111 */
1563         "0.125 dB/64 steps",     /* 10000 */
1564         "0.125 dB/128 steps",    /* 10001 */
1565         "0.125 dB/256 steps",    /* 10010 */
1566         "0.125 dB/512 steps",    /* 10011 */
1567         "0.125 dB/1024 steps",   /* 10100 */
1568         "0.125 dB/2048 steps",   /* 10101 */
1569         "0.125 dB/4096 steps",   /* 10110 */
1570         "0.125 dB/8192 steps",   /* 10111 = VOLUME_RAMP_MAX_DVC */
1571 };
1572 
1573 int rsnd_kctrl_new(struct rsnd_mod *mod,
1574                    struct rsnd_dai_stream *io,
1575                    struct snd_soc_pcm_runtime *rtd,
1576                    const unsigned char *name,
1577                    int (*accept)(struct rsnd_dai_stream *io),
1578                    void (*update)(struct rsnd_dai_stream *io,
1579                                   struct rsnd_mod *mod),
1580                    struct rsnd_kctrl_cfg *cfg,
1581                    const char * const *texts,
1582                    int size,
1583                    u32 max)
1584 {
1585         struct snd_card *card = rtd->card->snd_card;
1586         struct snd_kcontrol *kctrl;
1587         struct snd_kcontrol_new knew = {
1588                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
1589                 .name           = name,
1590                 .info           = rsnd_kctrl_info,
1591                 .index          = rtd->num,
1592                 .get            = rsnd_kctrl_get,
1593                 .put            = rsnd_kctrl_put,
1594         };
1595         int ret;
1596 
1597         /*
1598          * 1) Avoid duplicate register for DVC with MIX case
1599          * 2) Allow duplicate register for MIX
1600          * 3) re-register if card was rebinded
1601          */
1602         list_for_each_entry(kctrl, &card->controls, list) {
1603                 struct rsnd_kctrl_cfg *c = kctrl->private_data;
1604 
1605                 if (c == cfg)
1606                         return 0;
1607         }
1608 
1609         if (size > RSND_MAX_CHANNELS)
1610                 return -EINVAL;
1611 
1612         kctrl = snd_ctl_new1(&knew, cfg);
1613         if (!kctrl)
1614                 return -ENOMEM;
1615 
1616         ret = snd_ctl_add(card, kctrl);
1617         if (ret < 0)
1618                 return ret;
1619 
1620         cfg->texts      = texts;
1621         cfg->max        = max;
1622         cfg->size       = size;
1623         cfg->accept     = accept;
1624         cfg->update     = update;
1625         cfg->card       = card;
1626         cfg->kctrl      = kctrl;
1627         cfg->io         = io;
1628         cfg->mod        = mod;
1629 
1630         return 0;
1631 }
1632 
1633 /*
1634  *              snd_soc_component
1635  */
1636 static const struct snd_soc_component_driver rsnd_soc_component = {
1637         .ops            = &rsnd_pcm_ops,
1638         .name           = "rsnd",
1639 };
1640 
1641 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1642                                        struct rsnd_dai_stream *io)
1643 {
1644         int ret;
1645 
1646         ret = rsnd_dai_call(probe, io, priv);
1647         if (ret == -EAGAIN) {
1648                 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1649                 struct rsnd_mod *mod;
1650                 int i;
1651 
1652                 /*
1653                  * Fallback to PIO mode
1654                  */
1655 
1656                 /*
1657                  * call "remove" for SSI/SRC/DVC
1658                  * SSI will be switch to PIO mode if it was DMA mode
1659                  * see
1660                  *      rsnd_dma_init()
1661                  *      rsnd_ssi_fallback()
1662                  */
1663                 rsnd_dai_call(remove, io, priv);
1664 
1665                 /*
1666                  * remove all mod from io
1667                  * and, re connect ssi
1668                  */
1669                 for_each_rsnd_mod(i, mod, io)
1670                         rsnd_dai_disconnect(mod, io, i);
1671                 rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1672 
1673                 /*
1674                  * fallback
1675                  */
1676                 rsnd_dai_call(fallback, io, priv);
1677 
1678                 /*
1679                  * retry to "probe".
1680                  * DAI has SSI which is PIO mode only now.
1681                  */
1682                 ret = rsnd_dai_call(probe, io, priv);
1683         }
1684 
1685         return ret;
1686 }
1687 
1688 /*
1689  *      rsnd probe
1690  */
1691 static int rsnd_probe(struct platform_device *pdev)
1692 {
1693         struct rsnd_priv *priv;
1694         struct device *dev = &pdev->dev;
1695         struct rsnd_dai *rdai;
1696         int (*probe_func[])(struct rsnd_priv *priv) = {
1697                 rsnd_gen_probe,
1698                 rsnd_dma_probe,
1699                 rsnd_ssi_probe,
1700                 rsnd_ssiu_probe,
1701                 rsnd_src_probe,
1702                 rsnd_ctu_probe,
1703                 rsnd_mix_probe,
1704                 rsnd_dvc_probe,
1705                 rsnd_cmd_probe,
1706                 rsnd_adg_probe,
1707                 rsnd_dai_probe,
1708         };
1709         int ret, i;
1710 
1711         /*
1712          *      init priv data
1713          */
1714         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1715         if (!priv)
1716                 return -ENODEV;
1717 
1718         priv->pdev      = pdev;
1719         priv->flags     = (unsigned long)of_device_get_match_data(dev);
1720         spin_lock_init(&priv->lock);
1721 
1722         /*
1723          *      init each module
1724          */
1725         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1726                 ret = probe_func[i](priv);
1727                 if (ret)
1728                         return ret;
1729         }
1730 
1731         for_each_rsnd_dai(rdai, priv, i) {
1732                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1733                 if (ret)
1734                         goto exit_snd_probe;
1735 
1736                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1737                 if (ret)
1738                         goto exit_snd_probe;
1739         }
1740 
1741         dev_set_drvdata(dev, priv);
1742 
1743         /*
1744          *      asoc register
1745          */
1746         ret = devm_snd_soc_register_component(dev, &rsnd_soc_component,
1747                                          priv->daidrv, rsnd_rdai_nr(priv));
1748         if (ret < 0) {
1749                 dev_err(dev, "cannot snd dai register\n");
1750                 goto exit_snd_probe;
1751         }
1752 
1753         pm_runtime_enable(dev);
1754 
1755         dev_info(dev, "probed\n");
1756         return ret;
1757 
1758 exit_snd_probe:
1759         for_each_rsnd_dai(rdai, priv, i) {
1760                 rsnd_dai_call(remove, &rdai->playback, priv);
1761                 rsnd_dai_call(remove, &rdai->capture, priv);
1762         }
1763 
1764         /*
1765          * adg is very special mod which can't use rsnd_dai_call(remove),
1766          * and it registers ADG clock on probe.
1767          * It should be unregister if probe failed.
1768          * Mainly it is assuming -EPROBE_DEFER case
1769          */
1770         rsnd_adg_remove(priv);
1771 
1772         return ret;
1773 }
1774 
1775 static int rsnd_remove(struct platform_device *pdev)
1776 {
1777         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1778         struct rsnd_dai *rdai;
1779         void (*remove_func[])(struct rsnd_priv *priv) = {
1780                 rsnd_ssi_remove,
1781                 rsnd_ssiu_remove,
1782                 rsnd_src_remove,
1783                 rsnd_ctu_remove,
1784                 rsnd_mix_remove,
1785                 rsnd_dvc_remove,
1786                 rsnd_cmd_remove,
1787                 rsnd_adg_remove,
1788         };
1789         int ret = 0, i;
1790 
1791         snd_soc_disconnect_sync(&pdev->dev);
1792 
1793         pm_runtime_disable(&pdev->dev);
1794 
1795         for_each_rsnd_dai(rdai, priv, i) {
1796                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1797                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1798         }
1799 
1800         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1801                 remove_func[i](priv);
1802 
1803         return ret;
1804 }
1805 
1806 static int __maybe_unused rsnd_suspend(struct device *dev)
1807 {
1808         struct rsnd_priv *priv = dev_get_drvdata(dev);
1809 
1810         rsnd_adg_clk_disable(priv);
1811 
1812         return 0;
1813 }
1814 
1815 static int __maybe_unused rsnd_resume(struct device *dev)
1816 {
1817         struct rsnd_priv *priv = dev_get_drvdata(dev);
1818 
1819         rsnd_adg_clk_enable(priv);
1820 
1821         return 0;
1822 }
1823 
1824 static const struct dev_pm_ops rsnd_pm_ops = {
1825         SET_SYSTEM_SLEEP_PM_OPS(rsnd_suspend, rsnd_resume)
1826 };
1827 
1828 static struct platform_driver rsnd_driver = {
1829         .driver = {
1830                 .name   = "rcar_sound",
1831                 .pm     = &rsnd_pm_ops,
1832                 .of_match_table = rsnd_of_match,
1833         },
1834         .probe          = rsnd_probe,
1835         .remove         = rsnd_remove,
1836 };
1837 module_platform_driver(rsnd_driver);
1838 
1839 MODULE_LICENSE("GPL v2");
1840 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1841 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1842 MODULE_ALIAS("platform:rcar-pcm-audio");
1843 

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