Merge remote-tracking branch 'asoc/fix/intel' into asoc-linus
[sfrench/cifs-2.6.git] / 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 *ssiu = rsnd_io_to_mod_ssiu(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 : ssiu;
319         } else {
320                 struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
321
322                 target = cmd ? cmd : ssiu;
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 struct rsnd_mod *rsnd_mod_next(int *iterator,
352                                struct rsnd_dai_stream *io,
353                                enum rsnd_mod_type *array,
354                                int array_size)
355 {
356         struct rsnd_mod *mod;
357         enum rsnd_mod_type type;
358         int max = array ? array_size : RSND_MOD_MAX;
359
360         for (; *iterator < max; (*iterator)++) {
361                 type = (array) ? array[*iterator] : *iterator;
362                 mod = io->mod[type];
363                 if (!mod)
364                         continue;
365
366                 (*iterator)++;
367
368                 return mod;
369         }
370
371         return NULL;
372 }
373
374 static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
375         {
376                 /* CAPTURE */
377                 RSND_MOD_AUDMAPP,
378                 RSND_MOD_AUDMA,
379                 RSND_MOD_DVC,
380                 RSND_MOD_MIX,
381                 RSND_MOD_CTU,
382                 RSND_MOD_CMD,
383                 RSND_MOD_SRC,
384                 RSND_MOD_SSIU,
385                 RSND_MOD_SSIM3,
386                 RSND_MOD_SSIM2,
387                 RSND_MOD_SSIM1,
388                 RSND_MOD_SSIP,
389                 RSND_MOD_SSI,
390         }, {
391                 /* PLAYBACK */
392                 RSND_MOD_AUDMAPP,
393                 RSND_MOD_AUDMA,
394                 RSND_MOD_SSIM3,
395                 RSND_MOD_SSIM2,
396                 RSND_MOD_SSIM1,
397                 RSND_MOD_SSIP,
398                 RSND_MOD_SSI,
399                 RSND_MOD_SSIU,
400                 RSND_MOD_DVC,
401                 RSND_MOD_MIX,
402                 RSND_MOD_CTU,
403                 RSND_MOD_CMD,
404                 RSND_MOD_SRC,
405         },
406 };
407
408 static int rsnd_status_update(u32 *status,
409                               int shift, int add, int timing)
410 {
411         u32 mask        = 0xF << shift;
412         u8 val          = (*status >> shift) & 0xF;
413         u8 next_val     = (val + add) & 0xF;
414         int func_call   = (val == timing);
415
416         if (next_val == 0xF) /* underflow case */
417                 func_call = 0;
418         else
419                 *status = (*status & ~mask) + (next_val << shift);
420
421         return func_call;
422 }
423
424 #define rsnd_dai_call(fn, io, param...)                                 \
425 ({                                                                      \
426         struct rsnd_priv *priv = rsnd_io_to_priv(io);                   \
427         struct device *dev = rsnd_priv_to_dev(priv);                    \
428         struct rsnd_mod *mod;                                           \
429         int is_play = rsnd_io_is_play(io);                              \
430         int ret = 0, i;                                                 \
431         enum rsnd_mod_type *types = rsnd_mod_sequence[is_play];         \
432         for_each_rsnd_mod_arrays(i, mod, io, types, RSND_MOD_MAX) {     \
433                 int tmp = 0;                                            \
434                 u32 *status = mod->get_status(io, mod, types[i]);       \
435                 int func_call = rsnd_status_update(status,              \
436                                                 __rsnd_mod_shift_##fn,  \
437                                                 __rsnd_mod_add_##fn,    \
438                                                 __rsnd_mod_call_##fn);  \
439                 dev_dbg(dev, "%s[%d]\t0x%08x %s\n",                     \
440                         rsnd_mod_name(mod), rsnd_mod_id(mod), *status,  \
441                         (func_call && (mod)->ops->fn) ? #fn : "");      \
442                 if (func_call && (mod)->ops->fn)                        \
443                         tmp = (mod)->ops->fn(mod, io, param);           \
444                 if (tmp)                                                \
445                         dev_err(dev, "%s[%d] : %s error %d\n",          \
446                                 rsnd_mod_name(mod), rsnd_mod_id(mod),   \
447                                                      #fn, tmp);         \
448                 ret |= tmp;                                             \
449         }                                                               \
450         ret;                                                            \
451 })
452
453 int rsnd_dai_connect(struct rsnd_mod *mod,
454                      struct rsnd_dai_stream *io,
455                      enum rsnd_mod_type type)
456 {
457         struct rsnd_priv *priv;
458         struct device *dev;
459
460         if (!mod)
461                 return -EIO;
462
463         if (io->mod[type] == mod)
464                 return 0;
465
466         if (io->mod[type])
467                 return -EINVAL;
468
469         priv = rsnd_mod_to_priv(mod);
470         dev = rsnd_priv_to_dev(priv);
471
472         io->mod[type] = mod;
473
474         dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
475                 rsnd_mod_name(mod), rsnd_mod_id(mod),
476                 rsnd_io_is_play(io) ? "Playback" : "Capture");
477
478         return 0;
479 }
480
481 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
482                                 struct rsnd_dai_stream *io,
483                                 enum rsnd_mod_type type)
484 {
485         io->mod[type] = NULL;
486 }
487
488 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
489 {
490         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
491                 return NULL;
492
493         return priv->rdai + id;
494 }
495
496 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
497 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
498 {
499         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
500
501         return rsnd_rdai_get(priv, dai->id);
502 }
503
504 /*
505  *      rsnd_soc_dai functions
506  */
507 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
508 {
509         struct snd_pcm_substream *substream = io->substream;
510         struct snd_pcm_runtime *runtime = substream->runtime;
511         int pos = io->byte_pos + additional;
512
513         pos %= (runtime->periods * io->byte_per_period);
514
515         return pos;
516 }
517
518 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
519 {
520         io->byte_pos += byte;
521
522         if (io->byte_pos >= io->next_period_byte) {
523                 struct snd_pcm_substream *substream = io->substream;
524                 struct snd_pcm_runtime *runtime = substream->runtime;
525
526                 io->period_pos++;
527                 io->next_period_byte += io->byte_per_period;
528
529                 if (io->period_pos >= runtime->periods) {
530                         io->byte_pos = 0;
531                         io->period_pos = 0;
532                         io->next_period_byte = io->byte_per_period;
533                 }
534
535                 return true;
536         }
537
538         return false;
539 }
540
541 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
542 {
543         struct snd_pcm_substream *substream = io->substream;
544
545         /*
546          * this function should be called...
547          *
548          * - if rsnd_dai_pointer_update() returns true
549          * - without spin lock
550          */
551
552         snd_pcm_period_elapsed(substream);
553 }
554
555 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
556                                 struct snd_pcm_substream *substream)
557 {
558         struct snd_pcm_runtime *runtime = substream->runtime;
559
560         io->substream           = substream;
561         io->byte_pos            = 0;
562         io->period_pos          = 0;
563         io->byte_per_period     = runtime->period_size *
564                                   runtime->channels *
565                                   samples_to_bytes(runtime, 1);
566         io->next_period_byte    = io->byte_per_period;
567 }
568
569 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
570 {
571         io->substream           = NULL;
572 }
573
574 static
575 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
576 {
577         struct snd_soc_pcm_runtime *rtd = substream->private_data;
578
579         return  rtd->cpu_dai;
580 }
581
582 static
583 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
584                                         struct snd_pcm_substream *substream)
585 {
586         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
587                 return &rdai->playback;
588         else
589                 return &rdai->capture;
590 }
591
592 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
593                             struct snd_soc_dai *dai)
594 {
595         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
596         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
597         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
598         int ret;
599         unsigned long flags;
600
601         spin_lock_irqsave(&priv->lock, flags);
602
603         switch (cmd) {
604         case SNDRV_PCM_TRIGGER_START:
605         case SNDRV_PCM_TRIGGER_RESUME:
606                 rsnd_dai_stream_init(io, substream);
607
608                 ret = rsnd_dai_call(init, io, priv);
609                 if (ret < 0)
610                         goto dai_trigger_end;
611
612                 ret = rsnd_dai_call(start, io, priv);
613                 if (ret < 0)
614                         goto dai_trigger_end;
615
616                 ret = rsnd_dai_call(irq, io, priv, 1);
617                 if (ret < 0)
618                         goto dai_trigger_end;
619
620                 break;
621         case SNDRV_PCM_TRIGGER_STOP:
622         case SNDRV_PCM_TRIGGER_SUSPEND:
623                 ret = rsnd_dai_call(irq, io, priv, 0);
624
625                 ret |= rsnd_dai_call(stop, io, priv);
626
627                 ret |= rsnd_dai_call(quit, io, priv);
628
629                 rsnd_dai_stream_quit(io);
630                 break;
631         default:
632                 ret = -EINVAL;
633         }
634
635 dai_trigger_end:
636         spin_unlock_irqrestore(&priv->lock, flags);
637
638         return ret;
639 }
640
641 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
642 {
643         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
644
645         /* set master/slave audio interface */
646         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
647         case SND_SOC_DAIFMT_CBM_CFM:
648                 rdai->clk_master = 0;
649                 break;
650         case SND_SOC_DAIFMT_CBS_CFS:
651                 rdai->clk_master = 1; /* codec is slave, cpu is master */
652                 break;
653         default:
654                 return -EINVAL;
655         }
656
657         /* set format */
658         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
659         case SND_SOC_DAIFMT_I2S:
660                 rdai->sys_delay = 0;
661                 rdai->data_alignment = 0;
662                 rdai->frm_clk_inv = 0;
663                 break;
664         case SND_SOC_DAIFMT_LEFT_J:
665                 rdai->sys_delay = 1;
666                 rdai->data_alignment = 0;
667                 rdai->frm_clk_inv = 1;
668                 break;
669         case SND_SOC_DAIFMT_RIGHT_J:
670                 rdai->sys_delay = 1;
671                 rdai->data_alignment = 1;
672                 rdai->frm_clk_inv = 1;
673                 break;
674         }
675
676         /* set clock inversion */
677         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
678         case SND_SOC_DAIFMT_NB_IF:
679                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
680                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
681                 break;
682         case SND_SOC_DAIFMT_IB_NF:
683                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
684                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
685                 break;
686         case SND_SOC_DAIFMT_IB_IF:
687                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
688                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
689                 break;
690         case SND_SOC_DAIFMT_NB_NF:
691         default:
692                 break;
693         }
694
695         return 0;
696 }
697
698 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
699                                      u32 tx_mask, u32 rx_mask,
700                                      int slots, int slot_width)
701 {
702         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
703         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
704         struct device *dev = rsnd_priv_to_dev(priv);
705
706         switch (slots) {
707         case 6:
708                 /* TDM Extend Mode */
709                 rsnd_set_slot(rdai, slots, 1);
710                 break;
711         default:
712                 dev_err(dev, "unsupported TDM slots (%d)\n", slots);
713                 return -EINVAL;
714         }
715
716         return 0;
717 }
718
719 static int rsnd_soc_dai_startup(struct snd_pcm_substream *substream,
720                                 struct snd_soc_dai *dai)
721 {
722         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
723         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
724
725         /*
726          * call rsnd_dai_call without spinlock
727          */
728         return rsnd_dai_call(nolock_start, io, priv);
729 }
730
731 static void rsnd_soc_dai_shutdown(struct snd_pcm_substream *substream,
732                                   struct snd_soc_dai *dai)
733 {
734         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
735         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
736
737         /*
738          * call rsnd_dai_call without spinlock
739          */
740         rsnd_dai_call(nolock_stop, io, priv);
741 }
742
743 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
744         .startup        = rsnd_soc_dai_startup,
745         .shutdown       = rsnd_soc_dai_shutdown,
746         .trigger        = rsnd_soc_dai_trigger,
747         .set_fmt        = rsnd_soc_dai_set_fmt,
748         .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
749 };
750
751 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
752                 struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
753                 struct device_node *node,
754                 struct device_node *playback,
755                 struct device_node *capture)
756 {
757         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
758         struct device_node *np;
759         struct rsnd_mod *mod;
760         int i;
761
762         if (!node)
763                 return;
764
765         i = 0;
766         for_each_child_of_node(node, np) {
767                 mod = mod_get(priv, i);
768                 if (np == playback)
769                         rsnd_dai_connect(mod, &rdai->playback, mod->type);
770                 if (np == capture)
771                         rsnd_dai_connect(mod, &rdai->capture, mod->type);
772                 i++;
773         }
774
775         of_node_put(node);
776 }
777
778 static int rsnd_dai_probe(struct rsnd_priv *priv)
779 {
780         struct device_node *dai_node;
781         struct device_node *dai_np;
782         struct device_node *playback, *capture;
783         struct rsnd_dai_stream *io_playback;
784         struct rsnd_dai_stream *io_capture;
785         struct snd_soc_dai_driver *rdrv, *drv;
786         struct rsnd_dai *rdai;
787         struct device *dev = rsnd_priv_to_dev(priv);
788         int nr, dai_i, io_i;
789         int ret;
790
791         dai_node = rsnd_dai_of_node(priv);
792         nr = of_get_child_count(dai_node);
793         if (!nr) {
794                 ret = -EINVAL;
795                 goto rsnd_dai_probe_done;
796         }
797
798         rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
799         rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
800         if (!rdrv || !rdai) {
801                 ret = -ENOMEM;
802                 goto rsnd_dai_probe_done;
803         }
804
805         priv->rdai_nr   = nr;
806         priv->daidrv    = rdrv;
807         priv->rdai      = rdai;
808
809         /*
810          * parse all dai
811          */
812         dai_i = 0;
813         for_each_child_of_node(dai_node, dai_np) {
814                 rdai            = rsnd_rdai_get(priv, dai_i);
815                 drv             = rdrv + dai_i;
816                 io_playback     = &rdai->playback;
817                 io_capture      = &rdai->capture;
818
819                 snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
820
821                 rdai->priv      = priv;
822                 drv->name       = rdai->name;
823                 drv->ops        = &rsnd_soc_dai_ops;
824
825                 snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
826                          "DAI%d Playback", dai_i);
827                 drv->playback.rates             = RSND_RATES;
828                 drv->playback.formats           = RSND_FMTS;
829                 drv->playback.channels_min      = 2;
830                 drv->playback.channels_max      = 6;
831                 drv->playback.stream_name       = rdai->playback.name;
832
833                 snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
834                          "DAI%d Capture", dai_i);
835                 drv->capture.rates              = RSND_RATES;
836                 drv->capture.formats            = RSND_FMTS;
837                 drv->capture.channels_min       = 2;
838                 drv->capture.channels_max       = 6;
839                 drv->capture.stream_name        = rdai->capture.name;
840
841                 rdai->playback.rdai             = rdai;
842                 rdai->capture.rdai              = rdai;
843                 rsnd_set_slot(rdai, 2, 1); /* default */
844
845                 for (io_i = 0;; io_i++) {
846                         playback = of_parse_phandle(dai_np, "playback", io_i);
847                         capture  = of_parse_phandle(dai_np, "capture", io_i);
848
849                         if (!playback && !capture)
850                                 break;
851
852                         rsnd_parse_connect_ssi(rdai, playback, capture);
853                         rsnd_parse_connect_src(rdai, playback, capture);
854                         rsnd_parse_connect_ctu(rdai, playback, capture);
855                         rsnd_parse_connect_mix(rdai, playback, capture);
856                         rsnd_parse_connect_dvc(rdai, playback, capture);
857
858                         of_node_put(playback);
859                         of_node_put(capture);
860                 }
861
862                 dai_i++;
863
864                 dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
865                         rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
866                         rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
867         }
868
869         ret = 0;
870
871 rsnd_dai_probe_done:
872         of_node_put(dai_node);
873
874         return ret;
875 }
876
877 /*
878  *              pcm ops
879  */
880 static struct snd_pcm_hardware rsnd_pcm_hardware = {
881         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
882                         SNDRV_PCM_INFO_MMAP             |
883                         SNDRV_PCM_INFO_MMAP_VALID,
884         .buffer_bytes_max       = 64 * 1024,
885         .period_bytes_min       = 32,
886         .period_bytes_max       = 8192,
887         .periods_min            = 1,
888         .periods_max            = 32,
889         .fifo_size              = 256,
890 };
891
892 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
893 {
894         struct snd_pcm_runtime *runtime = substream->runtime;
895         int ret = 0;
896
897         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
898
899         ret = snd_pcm_hw_constraint_integer(runtime,
900                                             SNDRV_PCM_HW_PARAM_PERIODS);
901
902         return ret;
903 }
904
905 static int rsnd_hw_params(struct snd_pcm_substream *substream,
906                          struct snd_pcm_hw_params *hw_params)
907 {
908         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
909         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
910         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
911         int ret;
912
913         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
914         if (ret)
915                 return ret;
916
917         return snd_pcm_lib_malloc_pages(substream,
918                                         params_buffer_bytes(hw_params));
919 }
920
921 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
922 {
923         struct snd_pcm_runtime *runtime = substream->runtime;
924         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
925         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
926         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
927
928         return bytes_to_frames(runtime, io->byte_pos);
929 }
930
931 static struct snd_pcm_ops rsnd_pcm_ops = {
932         .open           = rsnd_pcm_open,
933         .ioctl          = snd_pcm_lib_ioctl,
934         .hw_params      = rsnd_hw_params,
935         .hw_free        = snd_pcm_lib_free_pages,
936         .pointer        = rsnd_pointer,
937 };
938
939 /*
940  *              snd_kcontrol
941  */
942 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
943 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
944                            struct snd_ctl_elem_info *uinfo)
945 {
946         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
947
948         if (cfg->texts) {
949                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
950                 uinfo->count = cfg->size;
951                 uinfo->value.enumerated.items = cfg->max;
952                 if (uinfo->value.enumerated.item >= cfg->max)
953                         uinfo->value.enumerated.item = cfg->max - 1;
954                 strlcpy(uinfo->value.enumerated.name,
955                         cfg->texts[uinfo->value.enumerated.item],
956                         sizeof(uinfo->value.enumerated.name));
957         } else {
958                 uinfo->count = cfg->size;
959                 uinfo->value.integer.min = 0;
960                 uinfo->value.integer.max = cfg->max;
961                 uinfo->type = (cfg->max == 1) ?
962                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
963                         SNDRV_CTL_ELEM_TYPE_INTEGER;
964         }
965
966         return 0;
967 }
968
969 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
970                           struct snd_ctl_elem_value *uc)
971 {
972         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
973         int i;
974
975         for (i = 0; i < cfg->size; i++)
976                 if (cfg->texts)
977                         uc->value.enumerated.item[i] = cfg->val[i];
978                 else
979                         uc->value.integer.value[i] = cfg->val[i];
980
981         return 0;
982 }
983
984 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
985                           struct snd_ctl_elem_value *uc)
986 {
987         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
988         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
989         int i, change = 0;
990
991         for (i = 0; i < cfg->size; i++) {
992                 if (cfg->texts) {
993                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
994                         cfg->val[i] = uc->value.enumerated.item[i];
995                 } else {
996                         change |= (uc->value.integer.value[i] != cfg->val[i]);
997                         cfg->val[i] = uc->value.integer.value[i];
998                 }
999         }
1000
1001         if (change && cfg->update)
1002                 cfg->update(cfg->io, mod);
1003
1004         return change;
1005 }
1006
1007 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
1008                             struct rsnd_dai_stream *io,
1009                             struct snd_soc_pcm_runtime *rtd,
1010                             const unsigned char *name,
1011                             struct rsnd_kctrl_cfg *cfg,
1012                             void (*update)(struct rsnd_dai_stream *io,
1013                                            struct rsnd_mod *mod))
1014 {
1015         struct snd_card *card = rtd->card->snd_card;
1016         struct snd_kcontrol *kctrl;
1017         struct snd_kcontrol_new knew = {
1018                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
1019                 .name           = name,
1020                 .info           = rsnd_kctrl_info,
1021                 .index          = rtd->num,
1022                 .get            = rsnd_kctrl_get,
1023                 .put            = rsnd_kctrl_put,
1024                 .private_value  = (unsigned long)cfg,
1025         };
1026         int ret;
1027
1028         kctrl = snd_ctl_new1(&knew, mod);
1029         if (!kctrl)
1030                 return -ENOMEM;
1031
1032         ret = snd_ctl_add(card, kctrl);
1033         if (ret < 0)
1034                 return ret;
1035
1036         cfg->update = update;
1037         cfg->card = card;
1038         cfg->kctrl = kctrl;
1039         cfg->io = io;
1040
1041         return 0;
1042 }
1043
1044 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
1045 {
1046         if (cfg->card && cfg->kctrl)
1047                 snd_ctl_remove(cfg->card, cfg->kctrl);
1048
1049         cfg->card = NULL;
1050         cfg->kctrl = NULL;
1051 }
1052
1053 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
1054                      struct rsnd_dai_stream *io,
1055                      struct snd_soc_pcm_runtime *rtd,
1056                      const unsigned char *name,
1057                      void (*update)(struct rsnd_dai_stream *io,
1058                                     struct rsnd_mod *mod),
1059                      struct rsnd_kctrl_cfg_m *_cfg,
1060                      int ch_size,
1061                      u32 max)
1062 {
1063         if (ch_size > RSND_MAX_CHANNELS)
1064                 return -EINVAL;
1065
1066         _cfg->cfg.max   = max;
1067         _cfg->cfg.size  = ch_size;
1068         _cfg->cfg.val   = _cfg->val;
1069         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1070 }
1071
1072 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
1073                      struct rsnd_dai_stream *io,
1074                      struct snd_soc_pcm_runtime *rtd,
1075                      const unsigned char *name,
1076                      void (*update)(struct rsnd_dai_stream *io,
1077                                     struct rsnd_mod *mod),
1078                      struct rsnd_kctrl_cfg_s *_cfg,
1079                      u32 max)
1080 {
1081         _cfg->cfg.max   = max;
1082         _cfg->cfg.size  = 1;
1083         _cfg->cfg.val   = &_cfg->val;
1084         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1085 }
1086
1087 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1088                      struct rsnd_dai_stream *io,
1089                      struct snd_soc_pcm_runtime *rtd,
1090                      const unsigned char *name,
1091                      struct rsnd_kctrl_cfg_s *_cfg,
1092                      void (*update)(struct rsnd_dai_stream *io,
1093                                     struct rsnd_mod *mod),
1094                      const char * const *texts,
1095                      u32 max)
1096 {
1097         _cfg->cfg.max   = max;
1098         _cfg->cfg.size  = 1;
1099         _cfg->cfg.val   = &_cfg->val;
1100         _cfg->cfg.texts = texts;
1101         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1102 }
1103
1104 /*
1105  *              snd_soc_platform
1106  */
1107
1108 #define PREALLOC_BUFFER         (32 * 1024)
1109 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1110
1111 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1112 {
1113         struct snd_soc_dai *dai = rtd->cpu_dai;
1114         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1115         int ret;
1116
1117         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1118         if (ret)
1119                 return ret;
1120
1121         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1122         if (ret)
1123                 return ret;
1124
1125         return snd_pcm_lib_preallocate_pages_for_all(
1126                 rtd->pcm,
1127                 SNDRV_DMA_TYPE_CONTINUOUS,
1128                 snd_dma_continuous_data(GFP_KERNEL),
1129                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1130 }
1131
1132 static struct snd_soc_platform_driver rsnd_soc_platform = {
1133         .ops            = &rsnd_pcm_ops,
1134         .pcm_new        = rsnd_pcm_new,
1135 };
1136
1137 static const struct snd_soc_component_driver rsnd_soc_component = {
1138         .name           = "rsnd",
1139 };
1140
1141 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1142                                        struct rsnd_dai_stream *io)
1143 {
1144         int ret;
1145
1146         ret = rsnd_dai_call(probe, io, priv);
1147         if (ret == -EAGAIN) {
1148                 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1149                 struct rsnd_mod *mod;
1150                 int i;
1151
1152                 /*
1153                  * Fallback to PIO mode
1154                  */
1155
1156                 /*
1157                  * call "remove" for SSI/SRC/DVC
1158                  * SSI will be switch to PIO mode if it was DMA mode
1159                  * see
1160                  *      rsnd_dma_init()
1161                  *      rsnd_ssi_fallback()
1162                  */
1163                 rsnd_dai_call(remove, io, priv);
1164
1165                 /*
1166                  * remove all mod from io
1167                  * and, re connect ssi
1168                  */
1169                 for_each_rsnd_mod(i, mod, io)
1170                         rsnd_dai_disconnect(mod, io, i);
1171                 rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1172
1173                 /*
1174                  * fallback
1175                  */
1176                 rsnd_dai_call(fallback, io, priv);
1177
1178                 /*
1179                  * retry to "probe".
1180                  * DAI has SSI which is PIO mode only now.
1181                  */
1182                 ret = rsnd_dai_call(probe, io, priv);
1183         }
1184
1185         return ret;
1186 }
1187
1188 /*
1189  *      rsnd probe
1190  */
1191 static int rsnd_probe(struct platform_device *pdev)
1192 {
1193         struct rsnd_priv *priv;
1194         struct device *dev = &pdev->dev;
1195         struct rsnd_dai *rdai;
1196         int (*probe_func[])(struct rsnd_priv *priv) = {
1197                 rsnd_gen_probe,
1198                 rsnd_dma_probe,
1199                 rsnd_ssi_probe,
1200                 rsnd_ssiu_probe,
1201                 rsnd_src_probe,
1202                 rsnd_ctu_probe,
1203                 rsnd_mix_probe,
1204                 rsnd_dvc_probe,
1205                 rsnd_cmd_probe,
1206                 rsnd_adg_probe,
1207                 rsnd_dai_probe,
1208         };
1209         int ret, i;
1210
1211         /*
1212          *      init priv data
1213          */
1214         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1215         if (!priv) {
1216                 dev_err(dev, "priv allocate failed\n");
1217                 return -ENODEV;
1218         }
1219
1220         priv->pdev      = pdev;
1221         priv->flags     = (unsigned long)of_device_get_match_data(dev);
1222         spin_lock_init(&priv->lock);
1223
1224         /*
1225          *      init each module
1226          */
1227         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1228                 ret = probe_func[i](priv);
1229                 if (ret)
1230                         return ret;
1231         }
1232
1233         for_each_rsnd_dai(rdai, priv, i) {
1234                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1235                 if (ret)
1236                         goto exit_snd_probe;
1237
1238                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1239                 if (ret)
1240                         goto exit_snd_probe;
1241         }
1242
1243         dev_set_drvdata(dev, priv);
1244
1245         /*
1246          *      asoc register
1247          */
1248         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1249         if (ret < 0) {
1250                 dev_err(dev, "cannot snd soc register\n");
1251                 return ret;
1252         }
1253
1254         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1255                                          priv->daidrv, rsnd_rdai_nr(priv));
1256         if (ret < 0) {
1257                 dev_err(dev, "cannot snd dai register\n");
1258                 goto exit_snd_soc;
1259         }
1260
1261         pm_runtime_enable(dev);
1262
1263         dev_info(dev, "probed\n");
1264         return ret;
1265
1266 exit_snd_soc:
1267         snd_soc_unregister_platform(dev);
1268 exit_snd_probe:
1269         for_each_rsnd_dai(rdai, priv, i) {
1270                 rsnd_dai_call(remove, &rdai->playback, priv);
1271                 rsnd_dai_call(remove, &rdai->capture, priv);
1272         }
1273
1274         return ret;
1275 }
1276
1277 static int rsnd_remove(struct platform_device *pdev)
1278 {
1279         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1280         struct rsnd_dai *rdai;
1281         void (*remove_func[])(struct rsnd_priv *priv) = {
1282                 rsnd_ssi_remove,
1283                 rsnd_ssiu_remove,
1284                 rsnd_src_remove,
1285                 rsnd_ctu_remove,
1286                 rsnd_mix_remove,
1287                 rsnd_dvc_remove,
1288                 rsnd_cmd_remove,
1289                 rsnd_adg_remove,
1290         };
1291         int ret = 0, i;
1292
1293         pm_runtime_disable(&pdev->dev);
1294
1295         for_each_rsnd_dai(rdai, priv, i) {
1296                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1297                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1298         }
1299
1300         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1301                 remove_func[i](priv);
1302
1303         snd_soc_unregister_component(&pdev->dev);
1304         snd_soc_unregister_platform(&pdev->dev);
1305
1306         return ret;
1307 }
1308
1309 static int rsnd_suspend(struct device *dev)
1310 {
1311         struct rsnd_priv *priv = dev_get_drvdata(dev);
1312
1313         rsnd_adg_clk_disable(priv);
1314
1315         return 0;
1316 }
1317
1318 static int rsnd_resume(struct device *dev)
1319 {
1320         struct rsnd_priv *priv = dev_get_drvdata(dev);
1321
1322         rsnd_adg_clk_enable(priv);
1323
1324         return 0;
1325 }
1326
1327 static struct dev_pm_ops rsnd_pm_ops = {
1328         .suspend                = rsnd_suspend,
1329         .resume                 = rsnd_resume,
1330 };
1331
1332 static struct platform_driver rsnd_driver = {
1333         .driver = {
1334                 .name   = "rcar_sound",
1335                 .pm     = &rsnd_pm_ops,
1336                 .of_match_table = rsnd_of_match,
1337         },
1338         .probe          = rsnd_probe,
1339         .remove         = rsnd_remove,
1340 };
1341 module_platform_driver(rsnd_driver);
1342
1343 MODULE_LICENSE("GPL");
1344 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1345 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1346 MODULE_ALIAS("platform:rcar-pcm-audio");