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

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