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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 src
 77  *   |
 78  *   +- src
 79  *      |
 80  *      +- src[0]
 81  *      +- src[1]
 82  *      +- src[2]
 83  *      ...
 84  *
 85  *
 86  * for_each_rsnd_dai(xx, priv, xx)
 87  *  rdai[0] => rdai[1] => rdai[2] => ...
 88  *
 89  * for_each_rsnd_mod(xx, rdai, xx)
 90  *  [mod] => [mod] => [mod] => ...
 91  *
 92  * rsnd_dai_call(xxx, fn )
 93  *  [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
 94  *
 95  */
 96 #include <linux/pm_runtime.h>
 97 #include "rsnd.h"
 98 
 99 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
100 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
101 
102 static const struct of_device_id rsnd_of_match[] = {
103         { .compatible = "renesas,rcar_sound-gen1", .data = (void *)RSND_GEN1 },
104         { .compatible = "renesas,rcar_sound-gen2", .data = (void *)RSND_GEN2 },
105         { .compatible = "renesas,rcar_sound-gen3", .data = (void *)RSND_GEN2 }, /* gen2 compatible */
106         {},
107 };
108 MODULE_DEVICE_TABLE(of, rsnd_of_match);
109 
110 /*
111  *      rsnd_mod functions
112  */
113 #ifdef DEBUG
114 void rsnd_mod_make_sure(struct rsnd_mod *mod, enum rsnd_mod_type type)
115 {
116         if (mod->type != type) {
117                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
118                 struct device *dev = rsnd_priv_to_dev(priv);
119 
120                 dev_warn(dev, "%s[%d] is not your expected module\n",
121                          rsnd_mod_name(mod), rsnd_mod_id(mod));
122         }
123 }
124 #endif
125 
126 char *rsnd_mod_name(struct rsnd_mod *mod)
127 {
128         if (!mod || !mod->ops)
129                 return "unknown";
130 
131         return mod->ops->name;
132 }
133 
134 struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
135                                   struct rsnd_mod *mod)
136 {
137         if (!mod || !mod->ops || !mod->ops->dma_req)
138                 return NULL;
139 
140         return mod->ops->dma_req(io, mod);
141 }
142 
143 u32 *rsnd_mod_get_status(struct rsnd_dai_stream *io,
144                          struct rsnd_mod *mod,
145                          enum rsnd_mod_type type)
146 {
147         return &mod->status;
148 }
149 
150 int rsnd_mod_init(struct rsnd_priv *priv,
151                   struct rsnd_mod *mod,
152                   struct rsnd_mod_ops *ops,
153                   struct clk *clk,
154                   u32* (*get_status)(struct rsnd_dai_stream *io,
155                                      struct rsnd_mod *mod,
156                                      enum rsnd_mod_type type),
157                   enum rsnd_mod_type type,
158                   int id)
159 {
160         int ret = clk_prepare(clk);
161 
162         if (ret)
163                 return ret;
164 
165         mod->id         = id;
166         mod->ops        = ops;
167         mod->type       = type;
168         mod->clk        = clk;
169         mod->priv       = priv;
170         mod->get_status = get_status;
171 
172         return ret;
173 }
174 
175 void rsnd_mod_quit(struct rsnd_mod *mod)
176 {
177         if (mod->clk)
178                 clk_unprepare(mod->clk);
179         mod->clk = NULL;
180 }
181 
182 void rsnd_mod_interrupt(struct rsnd_mod *mod,
183                         void (*callback)(struct rsnd_mod *mod,
184                                          struct rsnd_dai_stream *io))
185 {
186         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
187         struct rsnd_dai_stream *io;
188         struct rsnd_dai *rdai;
189         int i;
190 
191         for_each_rsnd_dai(rdai, priv, i) {
192                 io = &rdai->playback;
193                 if (mod == io->mod[mod->type])
194                         callback(mod, io);
195 
196                 io = &rdai->capture;
197                 if (mod == io->mod[mod->type])
198                         callback(mod, io);
199         }
200 }
201 
202 int rsnd_io_is_working(struct rsnd_dai_stream *io)
203 {
204         /* see rsnd_dai_stream_init/quit() */
205         return !!io->substream;
206 }
207 
208 void rsnd_set_slot(struct rsnd_dai *rdai,
209                    int slots, int num)
210 {
211         rdai->slots     = slots;
212         rdai->slots_num = num;
213 }
214 
215 int rsnd_get_slot(struct rsnd_dai_stream *io)
216 {
217         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
218 
219         return rdai->slots;
220 }
221 
222 int rsnd_get_slot_num(struct rsnd_dai_stream *io)
223 {
224         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
225 
226         return rdai->slots_num;
227 }
228 
229 int rsnd_runtime_channel_original(struct rsnd_dai_stream *io)
230 {
231         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
232 
233         return runtime->channels;
234 }
235 
236 int rsnd_runtime_channel_after_ctu(struct rsnd_dai_stream *io)
237 {
238         int chan = rsnd_runtime_channel_original(io);
239         struct rsnd_mod *ctu_mod = rsnd_io_to_mod_ctu(io);
240 
241         if (ctu_mod) {
242                 u32 converted_chan = rsnd_ctu_converted_channel(ctu_mod);
243 
244                 if (converted_chan)
245                         return converted_chan;
246         }
247 
248         return chan;
249 }
250 
251 int rsnd_runtime_channel_for_ssi(struct rsnd_dai_stream *io)
252 {
253         int chan = rsnd_io_is_play(io) ?
254                 rsnd_runtime_channel_after_ctu(io) :
255                 rsnd_runtime_channel_original(io);
256 
257         /* Use Multi SSI */
258         if (rsnd_runtime_is_ssi_multi(io))
259                 chan /= rsnd_get_slot_num(io);
260 
261         /* TDM Extend Mode needs 8ch */
262         if (chan == 6)
263                 chan = 8;
264 
265         return chan;
266 }
267 
268 int rsnd_runtime_is_ssi_multi(struct rsnd_dai_stream *io)
269 {
270         int slots = rsnd_get_slot_num(io);
271         int chan = rsnd_io_is_play(io) ?
272                 rsnd_runtime_channel_after_ctu(io) :
273                 rsnd_runtime_channel_original(io);
274 
275         return (chan >= 6) && (slots > 1);
276 }
277 
278 int rsnd_runtime_is_ssi_tdm(struct rsnd_dai_stream *io)
279 {
280         return rsnd_runtime_channel_for_ssi(io) >= 6;
281 }
282 
283 /*
284  *      ADINR function
285  */
286 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
287 {
288         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
289         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
290         struct device *dev = rsnd_priv_to_dev(priv);
291 
292         switch (runtime->sample_bits) {
293         case 16:
294                 return 8 << 16;
295         case 32:
296                 return 0 << 16;
297         }
298 
299         dev_warn(dev, "not supported sample bits\n");
300 
301         return 0;
302 }
303 
304 /*
305  *      DALIGN function
306  */
307 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
308 {
309         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
310         struct rsnd_mod *target;
311         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
312         u32 val = 0x76543210;
313         u32 mask = ~0;
314 
315         if (rsnd_io_is_play(io)) {
316                 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
317 
318                 target = src ? src : ssi;
319         } else {
320                 struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
321 
322                 target = cmd ? cmd : ssi;
323         }
324 
325         mask <<= runtime->channels * 4;
326         val = val & mask;
327 
328         switch (runtime->sample_bits) {
329         case 16:
330                 val |= 0x67452301 & ~mask;
331                 break;
332         case 32:
333                 val |= 0x76543210 & ~mask;
334                 break;
335         }
336 
337         /*
338          * exchange channeles on SRC if possible,
339          * otherwise, R/L volume settings on DVC
340          * changes inverted channels
341          */
342         if (mod == target)
343                 return val;
344         else
345                 return 0x76543210;
346 }
347 
348 /*
349  *      rsnd_dai functions
350  */
351 #define rsnd_mod_call(idx, io, func, param...)                  \
352 ({                                                              \
353         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
354         struct rsnd_mod *mod = (io)->mod[idx];                  \
355         struct device *dev = rsnd_priv_to_dev(priv);            \
356         u32 *status = mod->get_status(io, mod, idx);                    \
357         u32 mask = 0xF << __rsnd_mod_shift_##func;                      \
358         u8 val  = (*status >> __rsnd_mod_shift_##func) & 0xF;           \
359         u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);                \
360         int ret = 0;                                                    \
361         int call = (val == __rsnd_mod_call_##func) && (mod)->ops->func; \
362         if (add == 0xF)                                                 \
363                 call = 0;                                               \
364         else                                                            \
365                 *status = (*status & ~mask) +                           \
366                         (add << __rsnd_mod_shift_##func);               \
367         dev_dbg(dev, "%s[%d]\t0x%08x %s\n",                             \
368                 rsnd_mod_name(mod), rsnd_mod_id(mod),                   \
369                 *status, call ? #func : "");                            \
370         if (call)                                                       \
371                 ret = (mod)->ops->func(mod, io, param);                 \
372         if (ret)                                                        \
373                 dev_dbg(dev, "%s[%d] : rsnd_mod_call error %d\n",       \
374                         rsnd_mod_name(mod), rsnd_mod_id(mod), ret);     \
375         ret;                                                            \
376 })
377 
378 static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
379         {
380                 /* CAPTURE */
381                 RSND_MOD_AUDMAPP,
382                 RSND_MOD_AUDMA,
383                 RSND_MOD_DVC,
384                 RSND_MOD_MIX,
385                 RSND_MOD_CTU,
386                 RSND_MOD_CMD,
387                 RSND_MOD_SRC,
388                 RSND_MOD_SSIU,
389                 RSND_MOD_SSIM3,
390                 RSND_MOD_SSIM2,
391                 RSND_MOD_SSIM1,
392                 RSND_MOD_SSIP,
393                 RSND_MOD_SSI,
394         }, {
395                 /* PLAYBACK */
396                 RSND_MOD_AUDMAPP,
397                 RSND_MOD_AUDMA,
398                 RSND_MOD_SSIM3,
399                 RSND_MOD_SSIM2,
400                 RSND_MOD_SSIM1,
401                 RSND_MOD_SSIP,
402                 RSND_MOD_SSI,
403                 RSND_MOD_SSIU,
404                 RSND_MOD_DVC,
405                 RSND_MOD_MIX,
406                 RSND_MOD_CTU,
407                 RSND_MOD_CMD,
408                 RSND_MOD_SRC,
409         },
410 };
411 
412 #define rsnd_dai_call(fn, io, param...)                         \
413 ({                                                              \
414         struct rsnd_mod *mod;                                   \
415         int type, is_play = rsnd_io_is_play(io);                \
416         int ret = 0, i;                                         \
417         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
418                 type = rsnd_mod_sequence[is_play][i];           \
419                 mod = (io)->mod[type];                          \
420                 if (!mod)                                       \
421                         continue;                               \
422                 ret |= rsnd_mod_call(type, io, fn, param);      \
423         }                                                       \
424         ret;                                                    \
425 })
426 
427 int rsnd_dai_connect(struct rsnd_mod *mod,
428                      struct rsnd_dai_stream *io,
429                      enum rsnd_mod_type type)
430 {
431         struct rsnd_priv *priv;
432         struct device *dev;
433 
434         if (!mod)
435                 return -EIO;
436 
437         if (io->mod[type] == mod)
438                 return 0;
439 
440         if (io->mod[type])
441                 return -EINVAL;
442 
443         priv = rsnd_mod_to_priv(mod);
444         dev = rsnd_priv_to_dev(priv);
445 
446         io->mod[type] = mod;
447 
448         dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
449                 rsnd_mod_name(mod), rsnd_mod_id(mod),
450                 rsnd_io_is_play(io) ? "Playback" : "Capture");
451 
452         return 0;
453 }
454 
455 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
456                                 struct rsnd_dai_stream *io,
457                                 enum rsnd_mod_type type)
458 {
459         io->mod[type] = NULL;
460 }
461 
462 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
463 {
464         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
465                 return NULL;
466 
467         return priv->rdai + id;
468 }
469 
470 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
471 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
472 {
473         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
474 
475         return rsnd_rdai_get(priv, dai->id);
476 }
477 
478 /*
479  *      rsnd_soc_dai functions
480  */
481 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
482 {
483         struct snd_pcm_substream *substream = io->substream;
484         struct snd_pcm_runtime *runtime = substream->runtime;
485         int pos = io->byte_pos + additional;
486 
487         pos %= (runtime->periods * io->byte_per_period);
488 
489         return pos;
490 }
491 
492 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
493 {
494         io->byte_pos += byte;
495 
496         if (io->byte_pos >= io->next_period_byte) {
497                 struct snd_pcm_substream *substream = io->substream;
498                 struct snd_pcm_runtime *runtime = substream->runtime;
499 
500                 io->period_pos++;
501                 io->next_period_byte += io->byte_per_period;
502 
503                 if (io->period_pos >= runtime->periods) {
504                         io->byte_pos = 0;
505                         io->period_pos = 0;
506                         io->next_period_byte = io->byte_per_period;
507                 }
508 
509                 return true;
510         }
511 
512         return false;
513 }
514 
515 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
516 {
517         struct snd_pcm_substream *substream = io->substream;
518 
519         /*
520          * this function should be called...
521          *
522          * - if rsnd_dai_pointer_update() returns true
523          * - without spin lock
524          */
525 
526         snd_pcm_period_elapsed(substream);
527 }
528 
529 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
530                                 struct snd_pcm_substream *substream)
531 {
532         struct snd_pcm_runtime *runtime = substream->runtime;
533 
534         io->substream           = substream;
535         io->byte_pos            = 0;
536         io->period_pos          = 0;
537         io->byte_per_period     = runtime->period_size *
538                                   runtime->channels *
539                                   samples_to_bytes(runtime, 1);
540         io->next_period_byte    = io->byte_per_period;
541 }
542 
543 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
544 {
545         io->substream           = NULL;
546 }
547 
548 static
549 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
550 {
551         struct snd_soc_pcm_runtime *rtd = substream->private_data;
552 
553         return  rtd->cpu_dai;
554 }
555 
556 static
557 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
558                                         struct snd_pcm_substream *substream)
559 {
560         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
561                 return &rdai->playback;
562         else
563                 return &rdai->capture;
564 }
565 
566 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
567                             struct snd_soc_dai *dai)
568 {
569         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
570         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
571         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
572         int ret;
573         unsigned long flags;
574 
575         spin_lock_irqsave(&priv->lock, flags);
576 
577         switch (cmd) {
578         case SNDRV_PCM_TRIGGER_START:
579         case SNDRV_PCM_TRIGGER_RESUME:
580                 rsnd_dai_stream_init(io, substream);
581 
582                 ret = rsnd_dai_call(init, io, priv);
583                 if (ret < 0)
584                         goto dai_trigger_end;
585 
586                 ret = rsnd_dai_call(start, io, priv);
587                 if (ret < 0)
588                         goto dai_trigger_end;
589 
590                 ret = rsnd_dai_call(irq, io, priv, 1);
591                 if (ret < 0)
592                         goto dai_trigger_end;
593 
594                 break;
595         case SNDRV_PCM_TRIGGER_STOP:
596         case SNDRV_PCM_TRIGGER_SUSPEND:
597                 ret = rsnd_dai_call(irq, io, priv, 0);
598 
599                 ret |= rsnd_dai_call(stop, io, priv);
600 
601                 ret |= rsnd_dai_call(quit, io, priv);
602 
603                 rsnd_dai_stream_quit(io);
604                 break;
605         default:
606                 ret = -EINVAL;
607         }
608 
609 dai_trigger_end:
610         spin_unlock_irqrestore(&priv->lock, flags);
611 
612         return ret;
613 }
614 
615 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
616 {
617         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
618 
619         /* set master/slave audio interface */
620         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
621         case SND_SOC_DAIFMT_CBM_CFM:
622                 rdai->clk_master = 0;
623                 break;
624         case SND_SOC_DAIFMT_CBS_CFS:
625                 rdai->clk_master = 1; /* codec is slave, cpu is master */
626                 break;
627         default:
628                 return -EINVAL;
629         }
630 
631         /* set format */
632         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
633         case SND_SOC_DAIFMT_I2S:
634                 rdai->sys_delay = 0;
635                 rdai->data_alignment = 0;
636                 rdai->frm_clk_inv = 0;
637                 break;
638         case SND_SOC_DAIFMT_LEFT_J:
639                 rdai->sys_delay = 1;
640                 rdai->data_alignment = 0;
641                 rdai->frm_clk_inv = 1;
642                 break;
643         case SND_SOC_DAIFMT_RIGHT_J:
644                 rdai->sys_delay = 1;
645                 rdai->data_alignment = 1;
646                 rdai->frm_clk_inv = 1;
647                 break;
648         }
649 
650         /* set clock inversion */
651         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
652         case SND_SOC_DAIFMT_NB_IF:
653                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
654                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
655                 break;
656         case SND_SOC_DAIFMT_IB_NF:
657                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
658                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
659                 break;
660         case SND_SOC_DAIFMT_IB_IF:
661                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
662                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
663                 break;
664         case SND_SOC_DAIFMT_NB_NF:
665         default:
666                 break;
667         }
668 
669         return 0;
670 }
671 
672 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
673                                      u32 tx_mask, u32 rx_mask,
674                                      int slots, int slot_width)
675 {
676         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
677         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
678         struct device *dev = rsnd_priv_to_dev(priv);
679 
680         switch (slots) {
681         case 6:
682                 /* TDM Extend Mode */
683                 rsnd_set_slot(rdai, slots, 1);
684                 break;
685         default:
686                 dev_err(dev, "unsupported TDM slots (%d)\n", slots);
687                 return -EINVAL;
688         }
689 
690         return 0;
691 }
692 
693 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
694         .trigger        = rsnd_soc_dai_trigger,
695         .set_fmt        = rsnd_soc_dai_set_fmt,
696         .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
697 };
698 
699 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
700                 struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
701                 struct device_node *node,
702                 struct device_node *playback,
703                 struct device_node *capture)
704 {
705         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
706         struct device_node *np;
707         struct rsnd_mod *mod;
708         int i;
709 
710         if (!node)
711                 return;
712 
713         i = 0;
714         for_each_child_of_node(node, np) {
715                 mod = mod_get(priv, i);
716                 if (np == playback)
717                         rsnd_dai_connect(mod, &rdai->playback, mod->type);
718                 if (np == capture)
719                         rsnd_dai_connect(mod, &rdai->capture, mod->type);
720                 i++;
721         }
722 
723         of_node_put(node);
724 }
725 
726 static int rsnd_dai_probe(struct rsnd_priv *priv)
727 {
728         struct device_node *dai_node;
729         struct device_node *dai_np;
730         struct device_node *playback, *capture;
731         struct rsnd_dai_stream *io_playback;
732         struct rsnd_dai_stream *io_capture;
733         struct snd_soc_dai_driver *rdrv, *drv;
734         struct rsnd_dai *rdai;
735         struct device *dev = rsnd_priv_to_dev(priv);
736         int nr, dai_i, io_i;
737         int ret;
738 
739         dai_node = rsnd_dai_of_node(priv);
740         nr = of_get_child_count(dai_node);
741         if (!nr) {
742                 ret = -EINVAL;
743                 goto rsnd_dai_probe_done;
744         }
745 
746         rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
747         rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
748         if (!rdrv || !rdai) {
749                 ret = -ENOMEM;
750                 goto rsnd_dai_probe_done;
751         }
752 
753         priv->rdai_nr   = nr;
754         priv->daidrv    = rdrv;
755         priv->rdai      = rdai;
756 
757         /*
758          * parse all dai
759          */
760         dai_i = 0;
761         for_each_child_of_node(dai_node, dai_np) {
762                 rdai            = rsnd_rdai_get(priv, dai_i);
763                 drv             = rdrv + dai_i;
764                 io_playback     = &rdai->playback;
765                 io_capture      = &rdai->capture;
766 
767                 snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
768 
769                 rdai->priv      = priv;
770                 drv->name       = rdai->name;
771                 drv->ops        = &rsnd_soc_dai_ops;
772 
773                 snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
774                          "DAI%d Playback", dai_i);
775                 drv->playback.rates             = RSND_RATES;
776                 drv->playback.formats           = RSND_FMTS;
777                 drv->playback.channels_min      = 2;
778                 drv->playback.channels_max      = 6;
779                 drv->playback.stream_name       = rdai->playback.name;
780 
781                 snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
782                          "DAI%d Capture", dai_i);
783                 drv->capture.rates              = RSND_RATES;
784                 drv->capture.formats            = RSND_FMTS;
785                 drv->capture.channels_min       = 2;
786                 drv->capture.channels_max       = 6;
787                 drv->capture.stream_name        = rdai->capture.name;
788 
789                 rdai->playback.rdai             = rdai;
790                 rdai->capture.rdai              = rdai;
791                 rsnd_set_slot(rdai, 2, 1); /* default */
792 
793                 for (io_i = 0;; io_i++) {
794                         playback = of_parse_phandle(dai_np, "playback", io_i);
795                         capture  = of_parse_phandle(dai_np, "capture", io_i);
796 
797                         if (!playback && !capture)
798                                 break;
799 
800                         rsnd_parse_connect_ssi(rdai, playback, capture);
801                         rsnd_parse_connect_src(rdai, playback, capture);
802                         rsnd_parse_connect_ctu(rdai, playback, capture);
803                         rsnd_parse_connect_mix(rdai, playback, capture);
804                         rsnd_parse_connect_dvc(rdai, playback, capture);
805 
806                         of_node_put(playback);
807                         of_node_put(capture);
808                 }
809 
810                 dai_i++;
811 
812                 dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
813                         rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
814                         rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
815         }
816 
817         ret = 0;
818 
819 rsnd_dai_probe_done:
820         of_node_put(dai_node);
821 
822         return ret;
823 }
824 
825 /*
826  *              pcm ops
827  */
828 static struct snd_pcm_hardware rsnd_pcm_hardware = {
829         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
830                         SNDRV_PCM_INFO_MMAP             |
831                         SNDRV_PCM_INFO_MMAP_VALID,
832         .buffer_bytes_max       = 64 * 1024,
833         .period_bytes_min       = 32,
834         .period_bytes_max       = 8192,
835         .periods_min            = 1,
836         .periods_max            = 32,
837         .fifo_size              = 256,
838 };
839 
840 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
841 {
842         struct snd_pcm_runtime *runtime = substream->runtime;
843         int ret = 0;
844 
845         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
846 
847         ret = snd_pcm_hw_constraint_integer(runtime,
848                                             SNDRV_PCM_HW_PARAM_PERIODS);
849 
850         return ret;
851 }
852 
853 static int rsnd_hw_params(struct snd_pcm_substream *substream,
854                          struct snd_pcm_hw_params *hw_params)
855 {
856         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
857         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
858         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
859         int ret;
860 
861         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
862         if (ret)
863                 return ret;
864 
865         return snd_pcm_lib_malloc_pages(substream,
866                                         params_buffer_bytes(hw_params));
867 }
868 
869 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
870 {
871         struct snd_pcm_runtime *runtime = substream->runtime;
872         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
873         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
874         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
875 
876         return bytes_to_frames(runtime, io->byte_pos);
877 }
878 
879 static struct snd_pcm_ops rsnd_pcm_ops = {
880         .open           = rsnd_pcm_open,
881         .ioctl          = snd_pcm_lib_ioctl,
882         .hw_params      = rsnd_hw_params,
883         .hw_free        = snd_pcm_lib_free_pages,
884         .pointer        = rsnd_pointer,
885 };
886 
887 /*
888  *              snd_kcontrol
889  */
890 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
891 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
892                            struct snd_ctl_elem_info *uinfo)
893 {
894         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
895 
896         if (cfg->texts) {
897                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
898                 uinfo->count = cfg->size;
899                 uinfo->value.enumerated.items = cfg->max;
900                 if (uinfo->value.enumerated.item >= cfg->max)
901                         uinfo->value.enumerated.item = cfg->max - 1;
902                 strlcpy(uinfo->value.enumerated.name,
903                         cfg->texts[uinfo->value.enumerated.item],
904                         sizeof(uinfo->value.enumerated.name));
905         } else {
906                 uinfo->count = cfg->size;
907                 uinfo->value.integer.min = 0;
908                 uinfo->value.integer.max = cfg->max;
909                 uinfo->type = (cfg->max == 1) ?
910                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
911                         SNDRV_CTL_ELEM_TYPE_INTEGER;
912         }
913 
914         return 0;
915 }
916 
917 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
918                           struct snd_ctl_elem_value *uc)
919 {
920         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
921         int i;
922 
923         for (i = 0; i < cfg->size; i++)
924                 if (cfg->texts)
925                         uc->value.enumerated.item[i] = cfg->val[i];
926                 else
927                         uc->value.integer.value[i] = cfg->val[i];
928 
929         return 0;
930 }
931 
932 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
933                           struct snd_ctl_elem_value *uc)
934 {
935         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
936         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
937         int i, change = 0;
938 
939         for (i = 0; i < cfg->size; i++) {
940                 if (cfg->texts) {
941                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
942                         cfg->val[i] = uc->value.enumerated.item[i];
943                 } else {
944                         change |= (uc->value.integer.value[i] != cfg->val[i]);
945                         cfg->val[i] = uc->value.integer.value[i];
946                 }
947         }
948 
949         if (change && cfg->update)
950                 cfg->update(cfg->io, mod);
951 
952         return change;
953 }
954 
955 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
956                             struct rsnd_dai_stream *io,
957                             struct snd_soc_pcm_runtime *rtd,
958                             const unsigned char *name,
959                             struct rsnd_kctrl_cfg *cfg,
960                             void (*update)(struct rsnd_dai_stream *io,
961                                            struct rsnd_mod *mod))
962 {
963         struct snd_card *card = rtd->card->snd_card;
964         struct snd_kcontrol *kctrl;
965         struct snd_kcontrol_new knew = {
966                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
967                 .name           = name,
968                 .info           = rsnd_kctrl_info,
969                 .index          = rtd->num,
970                 .get            = rsnd_kctrl_get,
971                 .put            = rsnd_kctrl_put,
972                 .private_value  = (unsigned long)cfg,
973         };
974         int ret;
975 
976         kctrl = snd_ctl_new1(&knew, mod);
977         if (!kctrl)
978                 return -ENOMEM;
979 
980         ret = snd_ctl_add(card, kctrl);
981         if (ret < 0) {
982                 snd_ctl_free_one(kctrl);
983                 return ret;
984         }
985 
986         cfg->update = update;
987         cfg->card = card;
988         cfg->kctrl = kctrl;
989         cfg->io = io;
990 
991         return 0;
992 }
993 
994 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
995 {
996         snd_ctl_remove(cfg->card, cfg->kctrl);
997 }
998 
999 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
1000                      struct rsnd_dai_stream *io,
1001                      struct snd_soc_pcm_runtime *rtd,
1002                      const unsigned char *name,
1003                      void (*update)(struct rsnd_dai_stream *io,
1004                                     struct rsnd_mod *mod),
1005                      struct rsnd_kctrl_cfg_m *_cfg,
1006                      int ch_size,
1007                      u32 max)
1008 {
1009         if (ch_size > RSND_MAX_CHANNELS)
1010                 return -EINVAL;
1011 
1012         _cfg->cfg.max   = max;
1013         _cfg->cfg.size  = ch_size;
1014         _cfg->cfg.val   = _cfg->val;
1015         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1016 }
1017 
1018 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
1019                      struct rsnd_dai_stream *io,
1020                      struct snd_soc_pcm_runtime *rtd,
1021                      const unsigned char *name,
1022                      void (*update)(struct rsnd_dai_stream *io,
1023                                     struct rsnd_mod *mod),
1024                      struct rsnd_kctrl_cfg_s *_cfg,
1025                      u32 max)
1026 {
1027         _cfg->cfg.max   = max;
1028         _cfg->cfg.size  = 1;
1029         _cfg->cfg.val   = &_cfg->val;
1030         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1031 }
1032 
1033 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1034                      struct rsnd_dai_stream *io,
1035                      struct snd_soc_pcm_runtime *rtd,
1036                      const unsigned char *name,
1037                      struct rsnd_kctrl_cfg_s *_cfg,
1038                      void (*update)(struct rsnd_dai_stream *io,
1039                                     struct rsnd_mod *mod),
1040                      const char * const *texts,
1041                      u32 max)
1042 {
1043         _cfg->cfg.max   = max;
1044         _cfg->cfg.size  = 1;
1045         _cfg->cfg.val   = &_cfg->val;
1046         _cfg->cfg.texts = texts;
1047         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1048 }
1049 
1050 /*
1051  *              snd_soc_platform
1052  */
1053 
1054 #define PREALLOC_BUFFER         (32 * 1024)
1055 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1056 
1057 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1058 {
1059         struct snd_soc_dai *dai = rtd->cpu_dai;
1060         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1061         int ret;
1062 
1063         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1064         if (ret)
1065                 return ret;
1066 
1067         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1068         if (ret)
1069                 return ret;
1070 
1071         return snd_pcm_lib_preallocate_pages_for_all(
1072                 rtd->pcm,
1073                 SNDRV_DMA_TYPE_DEV,
1074                 rtd->card->snd_card->dev,
1075                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1076 }
1077 
1078 static struct snd_soc_platform_driver rsnd_soc_platform = {
1079         .ops            = &rsnd_pcm_ops,
1080         .pcm_new        = rsnd_pcm_new,
1081 };
1082 
1083 static const struct snd_soc_component_driver rsnd_soc_component = {
1084         .name           = "rsnd",
1085 };
1086 
1087 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1088                                        struct rsnd_dai_stream *io)
1089 {
1090         int ret;
1091 
1092         ret = rsnd_dai_call(probe, io, priv);
1093         if (ret == -EAGAIN) {
1094                 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1095                 int i;
1096 
1097                 /*
1098                  * Fallback to PIO mode
1099                  */
1100 
1101                 /*
1102                  * call "remove" for SSI/SRC/DVC
1103                  * SSI will be switch to PIO mode if it was DMA mode
1104                  * see
1105                  *      rsnd_dma_init()
1106                  *      rsnd_ssi_fallback()
1107                  */
1108                 rsnd_dai_call(remove, io, priv);
1109 
1110                 /*
1111                  * remove all mod from io
1112                  * and, re connect ssi
1113                  */
1114                 for (i = 0; i < RSND_MOD_MAX; i++)
1115                         rsnd_dai_disconnect((io)->mod[i], io, i);
1116                 rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1117 
1118                 /*
1119                  * fallback
1120                  */
1121                 rsnd_dai_call(fallback, io, priv);
1122 
1123                 /*
1124                  * retry to "probe".
1125                  * DAI has SSI which is PIO mode only now.
1126                  */
1127                 ret = rsnd_dai_call(probe, io, priv);
1128         }
1129 
1130         return ret;
1131 }
1132 
1133 /*
1134  *      rsnd probe
1135  */
1136 static int rsnd_probe(struct platform_device *pdev)
1137 {
1138         struct rsnd_priv *priv;
1139         struct device *dev = &pdev->dev;
1140         struct rsnd_dai *rdai;
1141         int (*probe_func[])(struct rsnd_priv *priv) = {
1142                 rsnd_gen_probe,
1143                 rsnd_dma_probe,
1144                 rsnd_ssi_probe,
1145                 rsnd_ssiu_probe,
1146                 rsnd_src_probe,
1147                 rsnd_ctu_probe,
1148                 rsnd_mix_probe,
1149                 rsnd_dvc_probe,
1150                 rsnd_cmd_probe,
1151                 rsnd_adg_probe,
1152                 rsnd_dai_probe,
1153         };
1154         int ret, i;
1155 
1156         /*
1157          *      init priv data
1158          */
1159         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1160         if (!priv) {
1161                 dev_err(dev, "priv allocate failed\n");
1162                 return -ENODEV;
1163         }
1164 
1165         priv->pdev      = pdev;
1166         priv->flags     = (unsigned long)of_device_get_match_data(dev);
1167         spin_lock_init(&priv->lock);
1168 
1169         /*
1170          *      init each module
1171          */
1172         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1173                 ret = probe_func[i](priv);
1174                 if (ret)
1175                         return ret;
1176         }
1177 
1178         for_each_rsnd_dai(rdai, priv, i) {
1179                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1180                 if (ret)
1181                         goto exit_snd_probe;
1182 
1183                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1184                 if (ret)
1185                         goto exit_snd_probe;
1186         }
1187 
1188         dev_set_drvdata(dev, priv);
1189 
1190         /*
1191          *      asoc register
1192          */
1193         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1194         if (ret < 0) {
1195                 dev_err(dev, "cannot snd soc register\n");
1196                 return ret;
1197         }
1198 
1199         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1200                                          priv->daidrv, rsnd_rdai_nr(priv));
1201         if (ret < 0) {
1202                 dev_err(dev, "cannot snd dai register\n");
1203                 goto exit_snd_soc;
1204         }
1205 
1206         pm_runtime_enable(dev);
1207 
1208         dev_info(dev, "probed\n");
1209         return ret;
1210 
1211 exit_snd_soc:
1212         snd_soc_unregister_platform(dev);
1213 exit_snd_probe:
1214         for_each_rsnd_dai(rdai, priv, i) {
1215                 rsnd_dai_call(remove, &rdai->playback, priv);
1216                 rsnd_dai_call(remove, &rdai->capture, priv);
1217         }
1218 
1219         return ret;
1220 }
1221 
1222 static int rsnd_remove(struct platform_device *pdev)
1223 {
1224         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1225         struct rsnd_dai *rdai;
1226         void (*remove_func[])(struct rsnd_priv *priv) = {
1227                 rsnd_ssi_remove,
1228                 rsnd_ssiu_remove,
1229                 rsnd_src_remove,
1230                 rsnd_ctu_remove,
1231                 rsnd_mix_remove,
1232                 rsnd_dvc_remove,
1233                 rsnd_cmd_remove,
1234                 rsnd_adg_remove,
1235         };
1236         int ret = 0, i;
1237 
1238         pm_runtime_disable(&pdev->dev);
1239 
1240         for_each_rsnd_dai(rdai, priv, i) {
1241                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1242                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1243         }
1244 
1245         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1246                 remove_func[i](priv);
1247 
1248         snd_soc_unregister_component(&pdev->dev);
1249         snd_soc_unregister_platform(&pdev->dev);
1250 
1251         return ret;
1252 }
1253 
1254 static struct platform_driver rsnd_driver = {
1255         .driver = {
1256                 .name   = "rcar_sound",
1257                 .of_match_table = rsnd_of_match,
1258         },
1259         .probe          = rsnd_probe,
1260         .remove         = rsnd_remove,
1261 };
1262 module_platform_driver(rsnd_driver);
1263 
1264 MODULE_LICENSE("GPL");
1265 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1266 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1267 MODULE_ALIAS("platform:rcar-pcm-audio");
1268 

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