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[platform/adaptation/renesas_rcar/renesas_kernel.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 <linux/shdma-base.h>
98 #include "rsnd.h"
99
100 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
101 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
102
103 static struct rsnd_of_data rsnd_of_data_gen1 = {
104         .flags = RSND_GEN1,
105 };
106
107 static struct rsnd_of_data rsnd_of_data_gen2 = {
108         .flags = RSND_GEN2,
109 };
110
111 static struct of_device_id rsnd_of_match[] = {
112         { .compatible = "renesas,rcar_sound-gen1", .data = &rsnd_of_data_gen1 },
113         { .compatible = "renesas,rcar_sound-gen2", .data = &rsnd_of_data_gen2 },
114         {},
115 };
116 MODULE_DEVICE_TABLE(of, rsnd_of_match);
117
118 /*
119  *      rsnd_platform functions
120  */
121 #define rsnd_platform_call(priv, dai, func, param...)   \
122         (!(priv->info->func) ? 0 :              \
123          priv->info->func(param))
124
125 #define rsnd_is_enable_path(io, name) \
126         ((io)->info ? (io)->info->name : NULL)
127 #define rsnd_info_id(priv, io, name) \
128         ((io)->info->name - priv->info->name##_info)
129
130 /*
131  *      rsnd_mod functions
132  */
133 char *rsnd_mod_name(struct rsnd_mod *mod)
134 {
135         if (!mod || !mod->ops)
136                 return "unknown";
137
138         return mod->ops->name;
139 }
140
141 char *rsnd_mod_dma_name(struct rsnd_mod *mod)
142 {
143         if (!mod || !mod->ops)
144                 return "unknown";
145
146         if (!mod->ops->dma_name)
147                 return mod->ops->name;
148
149         return mod->ops->dma_name(mod);
150 }
151
152 void rsnd_mod_init(struct rsnd_priv *priv,
153                    struct rsnd_mod *mod,
154                    struct rsnd_mod_ops *ops,
155                    enum rsnd_mod_type type,
156                    int id)
157 {
158         mod->priv       = priv;
159         mod->id         = id;
160         mod->ops        = ops;
161         mod->type       = type;
162 }
163
164 /*
165  *      rsnd_dma functions
166  */
167 void rsnd_dma_stop(struct rsnd_dma *dma)
168 {
169         dmaengine_terminate_all(dma->chan);
170 }
171
172 static void rsnd_dma_complete(void *data)
173 {
174         struct rsnd_dma *dma = (struct rsnd_dma *)data;
175         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
176         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
177
178         /*
179          * Renesas sound Gen1 needs 1 DMAC,
180          * Gen2 needs 2 DMAC.
181          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
182          * But, Audio-DMAC-peri-peri doesn't have interrupt,
183          * and this driver is assuming that here.
184          *
185          * If Audio-DMAC-peri-peri has interrpt,
186          * rsnd_dai_pointer_update() will be called twice,
187          * ant it will breaks io->byte_pos
188          */
189
190         rsnd_dai_pointer_update(io, io->byte_per_period);
191 }
192
193 void rsnd_dma_start(struct rsnd_dma *dma)
194 {
195         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
196         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
197         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
198         struct snd_pcm_substream *substream = io->substream;
199         struct device *dev = rsnd_priv_to_dev(priv);
200         struct dma_async_tx_descriptor *desc;
201
202         desc = dmaengine_prep_dma_cyclic(dma->chan,
203                                          (dma->addr) ? dma->addr :
204                                          substream->runtime->dma_addr,
205                                          snd_pcm_lib_buffer_bytes(substream),
206                                          snd_pcm_lib_period_bytes(substream),
207                                          dma->dir,
208                                          DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
209
210         if (!desc) {
211                 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
212                 return;
213         }
214
215         desc->callback          = rsnd_dma_complete;
216         desc->callback_param    = dma;
217
218         if (dmaengine_submit(desc) < 0) {
219                 dev_err(dev, "dmaengine_submit() fail\n");
220                 return;
221         }
222
223         dma_async_issue_pending(dma->chan);
224 }
225
226 int rsnd_dma_available(struct rsnd_dma *dma)
227 {
228         return !!dma->chan;
229 }
230
231 #define DMA_NAME_SIZE 16
232 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
233 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
234 {
235         if (mod)
236                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
237                          rsnd_mod_dma_name(mod), rsnd_mod_id(mod));
238         else
239                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
240
241 }
242
243 static void rsnd_dma_of_name(struct rsnd_mod *mod_from,
244                              struct rsnd_mod *mod_to,
245                              char *dma_name)
246 {
247         int index = 0;
248
249         index = _rsnd_dma_of_name(dma_name + index, mod_from);
250         *(dma_name + index++) = '_';
251         index = _rsnd_dma_of_name(dma_name + index, mod_to);
252 }
253
254 static void rsnd_dma_of_path(struct rsnd_dma *dma,
255                              int is_play,
256                              struct rsnd_mod **mod_from,
257                              struct rsnd_mod **mod_to)
258 {
259         struct rsnd_mod *this = rsnd_dma_to_mod(dma);
260         struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
261         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
262         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
263         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
264         struct rsnd_mod *mod[MOD_MAX];
265         int i, index;
266
267
268         for (i = 0; i < MOD_MAX; i++)
269                 mod[i] = NULL;
270
271         /*
272          * in play case...
273          *
274          * src -> dst
275          *
276          * mem -> SSI
277          * mem -> SRC -> SSI
278          * mem -> SRC -> DVC -> SSI
279          */
280         mod[0] = NULL; /* for "mem" */
281         index = 1;
282         for (i = 1; i < MOD_MAX; i++) {
283                 if (!src) {
284                         mod[i] = ssi;
285                 } else if (!dvc) {
286                         mod[i] = src;
287                         src = NULL;
288                 } else {
289                         if ((!is_play) && (this == src))
290                                 this = dvc;
291
292                         mod[i] = (is_play) ? src : dvc;
293                         i++;
294                         mod[i] = (is_play) ? dvc : src;
295                         src = NULL;
296                         dvc = NULL;
297                 }
298
299                 if (mod[i] == this)
300                         index = i;
301
302                 if (mod[i] == ssi)
303                         break;
304         }
305
306         if (is_play) {
307                 *mod_from = mod[index - 1];
308                 *mod_to   = mod[index];
309         } else {
310                 *mod_from = mod[index];
311                 *mod_to   = mod[index - 1];
312         }
313 }
314
315 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
316                   int is_play, int id)
317 {
318         struct device *dev = rsnd_priv_to_dev(priv);
319         struct dma_slave_config cfg;
320         struct rsnd_mod *mod_from;
321         struct rsnd_mod *mod_to;
322         char dma_name[DMA_NAME_SIZE];
323         dma_cap_mask_t mask;
324         int ret;
325
326         if (dma->chan) {
327                 dev_err(dev, "it already has dma channel\n");
328                 return -EIO;
329         }
330
331         dma_cap_zero(mask);
332         dma_cap_set(DMA_SLAVE, mask);
333
334         rsnd_dma_of_path(dma, is_play, &mod_from, &mod_to);
335         rsnd_dma_of_name(mod_from, mod_to, dma_name);
336
337         cfg.slave_id    = id;
338         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
339         cfg.src_addr    = rsnd_gen_dma_addr(priv, mod_from, is_play, 1);
340         cfg.dst_addr    = rsnd_gen_dma_addr(priv, mod_to,   is_play, 0);
341         cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
342         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
343
344         dev_dbg(dev, "dma : %s %pad -> %pad\n",
345                 dma_name, &cfg.src_addr, &cfg.dst_addr);
346
347         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
348                                                      (void *)id, dev,
349                                                      dma_name);
350         if (!dma->chan) {
351                 dev_err(dev, "can't get dma channel\n");
352                 goto rsnd_dma_channel_err;
353         }
354
355         ret = dmaengine_slave_config(dma->chan, &cfg);
356         if (ret < 0)
357                 goto rsnd_dma_init_err;
358
359         dma->addr = is_play ? cfg.src_addr : cfg.dst_addr;
360         dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
361
362         return 0;
363
364 rsnd_dma_init_err:
365         rsnd_dma_quit(priv, dma);
366 rsnd_dma_channel_err:
367
368         /*
369          * DMA failed. try to PIO mode
370          * see
371          *      rsnd_ssi_dma_remove()
372          *      rsnd_rdai_continuance_probe()
373          */
374         return -EAGAIN;
375 }
376
377 void  rsnd_dma_quit(struct rsnd_priv *priv,
378                     struct rsnd_dma *dma)
379 {
380         if (dma->chan)
381                 dma_release_channel(dma->chan);
382
383         dma->chan = NULL;
384 }
385
386 /*
387  *      settting function
388  */
389 u32 rsnd_get_adinr(struct rsnd_mod *mod)
390 {
391         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
392         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
393         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
394         struct device *dev = rsnd_priv_to_dev(priv);
395         u32 adinr = runtime->channels;
396
397         switch (runtime->sample_bits) {
398         case 16:
399                 adinr |= (8 << 16);
400                 break;
401         case 32:
402                 adinr |= (0 << 16);
403                 break;
404         default:
405                 dev_warn(dev, "not supported sample bits\n");
406                 return 0;
407         }
408
409         return adinr;
410 }
411
412 /*
413  *      rsnd_dai functions
414  */
415 #define __rsnd_mod_call(mod, func, rdai...)                     \
416 ({                                                              \
417         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
418         struct device *dev = rsnd_priv_to_dev(priv);            \
419         dev_dbg(dev, "%s[%d] %s\n",                             \
420                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
421         (mod)->ops->func(mod, rdai);                            \
422 })
423
424 #define rsnd_mod_call(mod, func, rdai...)       \
425         (!(mod) ? -ENODEV :                     \
426          !((mod)->ops->func) ? 0 :              \
427          __rsnd_mod_call(mod, func, rdai))
428
429 #define rsnd_dai_call(fn, io, rdai...)                          \
430 ({                                                              \
431         struct rsnd_mod *mod;                                   \
432         int ret = 0, i;                                         \
433         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
434                 mod = (io)->mod[i];                             \
435                 if (!mod)                                       \
436                         continue;                               \
437                 ret = rsnd_mod_call(mod, fn, rdai);             \
438                 if (ret < 0)                                    \
439                         break;                                  \
440         }                                                       \
441         ret;                                                    \
442 })
443
444 static int rsnd_dai_connect(struct rsnd_mod *mod,
445                             struct rsnd_dai_stream *io)
446 {
447         if (!mod)
448                 return -EIO;
449
450         if (io->mod[mod->type]) {
451                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
452                 struct device *dev = rsnd_priv_to_dev(priv);
453
454                 dev_err(dev, "%s%d is not empty\n",
455                         rsnd_mod_name(mod),
456                         rsnd_mod_id(mod));
457                 return -EIO;
458         }
459
460         io->mod[mod->type] = mod;
461         mod->io = io;
462
463         return 0;
464 }
465
466 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
467                                 struct rsnd_dai_stream *io)
468 {
469         mod->io = NULL;
470         io->mod[mod->type] = NULL;
471 }
472
473 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
474 {
475         int id = rdai - priv->rdai;
476
477         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
478                 return -EINVAL;
479
480         return id;
481 }
482
483 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
484 {
485         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
486                 return NULL;
487
488         return priv->rdai + id;
489 }
490
491 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
492 {
493         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
494
495         return rsnd_dai_get(priv, dai->id);
496 }
497
498 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
499 {
500         return &rdai->playback == io;
501 }
502
503 /*
504  *      rsnd_soc_dai functions
505  */
506 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
507 {
508         struct snd_pcm_substream *substream = io->substream;
509         struct snd_pcm_runtime *runtime = substream->runtime;
510         int pos = io->byte_pos + additional;
511
512         pos %= (runtime->periods * io->byte_per_period);
513
514         return pos;
515 }
516
517 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
518 {
519         io->byte_pos += byte;
520
521         if (io->byte_pos >= io->next_period_byte) {
522                 struct snd_pcm_substream *substream = io->substream;
523                 struct snd_pcm_runtime *runtime = substream->runtime;
524
525                 io->period_pos++;
526                 io->next_period_byte += io->byte_per_period;
527
528                 if (io->period_pos >= runtime->periods) {
529                         io->byte_pos = 0;
530                         io->period_pos = 0;
531                         io->next_period_byte = io->byte_per_period;
532                 }
533
534                 snd_pcm_period_elapsed(substream);
535         }
536 }
537
538 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
539                                 struct snd_pcm_substream *substream)
540 {
541         struct snd_pcm_runtime *runtime = substream->runtime;
542
543         io->substream           = substream;
544         io->byte_pos            = 0;
545         io->period_pos          = 0;
546         io->byte_per_period     = runtime->period_size *
547                                   runtime->channels *
548                                   samples_to_bytes(runtime, 1);
549         io->next_period_byte    = io->byte_per_period;
550
551         return 0;
552 }
553
554 static
555 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
556 {
557         struct snd_soc_pcm_runtime *rtd = substream->private_data;
558
559         return  rtd->cpu_dai;
560 }
561
562 static
563 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
564                                         struct snd_pcm_substream *substream)
565 {
566         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
567                 return &rdai->playback;
568         else
569                 return &rdai->capture;
570 }
571
572 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
573                             struct snd_soc_dai *dai)
574 {
575         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
576         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
577         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
578         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
579         int ret;
580         unsigned long flags;
581
582         rsnd_lock(priv, flags);
583
584         switch (cmd) {
585         case SNDRV_PCM_TRIGGER_START:
586                 ret = rsnd_dai_stream_init(io, substream);
587                 if (ret < 0)
588                         goto dai_trigger_end;
589
590                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
591                 if (ret < 0)
592                         goto dai_trigger_end;
593
594                 ret = rsnd_dai_call(init, io, rdai);
595                 if (ret < 0)
596                         goto dai_trigger_end;
597
598                 ret = rsnd_dai_call(start, io, rdai);
599                 if (ret < 0)
600                         goto dai_trigger_end;
601                 break;
602         case SNDRV_PCM_TRIGGER_STOP:
603                 ret = rsnd_dai_call(stop, io, rdai);
604                 if (ret < 0)
605                         goto dai_trigger_end;
606
607                 ret = rsnd_dai_call(quit, io, rdai);
608                 if (ret < 0)
609                         goto dai_trigger_end;
610
611                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
612                 if (ret < 0)
613                         goto dai_trigger_end;
614                 break;
615         default:
616                 ret = -EINVAL;
617         }
618
619 dai_trigger_end:
620         rsnd_unlock(priv, flags);
621
622         return ret;
623 }
624
625 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
626 {
627         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
628
629         /* set master/slave audio interface */
630         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
631         case SND_SOC_DAIFMT_CBM_CFM:
632                 rdai->clk_master = 0;
633                 break;
634         case SND_SOC_DAIFMT_CBS_CFS:
635                 rdai->clk_master = 1; /* codec is slave, cpu is master */
636                 break;
637         default:
638                 return -EINVAL;
639         }
640
641         /* set format */
642         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
643         case SND_SOC_DAIFMT_I2S:
644                 rdai->sys_delay = 0;
645                 rdai->data_alignment = 0;
646                 rdai->frm_clk_inv = 0;
647                 break;
648         case SND_SOC_DAIFMT_LEFT_J:
649                 rdai->sys_delay = 1;
650                 rdai->data_alignment = 0;
651                 rdai->frm_clk_inv = 1;
652                 break;
653         case SND_SOC_DAIFMT_RIGHT_J:
654                 rdai->sys_delay = 1;
655                 rdai->data_alignment = 1;
656                 rdai->frm_clk_inv = 1;
657                 break;
658         }
659
660         /* set clock inversion */
661         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
662         case SND_SOC_DAIFMT_NB_IF:
663                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
664                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
665                 break;
666         case SND_SOC_DAIFMT_IB_NF:
667                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
668                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
669                 break;
670         case SND_SOC_DAIFMT_IB_IF:
671                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
672                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
673                 break;
674         case SND_SOC_DAIFMT_NB_NF:
675         default:
676                 break;
677         }
678
679         return 0;
680 }
681
682 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
683         .trigger        = rsnd_soc_dai_trigger,
684         .set_fmt        = rsnd_soc_dai_set_fmt,
685 };
686
687 #define rsnd_path_parse(priv, io, type)                         \
688 ({                                                              \
689         struct rsnd_mod *mod;                                   \
690         int ret = 0;                                            \
691         int id = -1;                                            \
692                                                                 \
693         if (rsnd_is_enable_path(io, type)) {                    \
694                 id = rsnd_info_id(priv, io, type);              \
695                 if (id >= 0) {                                  \
696                         mod = rsnd_##type##_mod_get(priv, id);  \
697                         ret = rsnd_dai_connect(mod, io);        \
698                 }                                               \
699         }                                                       \
700         ret;                                                    \
701 })
702
703 #define rsnd_path_break(priv, io, type)                         \
704 {                                                               \
705         struct rsnd_mod *mod;                                   \
706         int id = -1;                                            \
707                                                                 \
708         if (rsnd_is_enable_path(io, type)) {                    \
709                 id = rsnd_info_id(priv, io, type);              \
710                 if (id >= 0) {                                  \
711                         mod = rsnd_##type##_mod_get(priv, id);  \
712                         rsnd_dai_disconnect(mod, io);           \
713                 }                                               \
714         }                                                       \
715 }
716
717 static int rsnd_path_init(struct rsnd_priv *priv,
718                           struct rsnd_dai *rdai,
719                           struct rsnd_dai_stream *io)
720 {
721         int ret;
722
723         /*
724          * Gen1 is created by SRU/SSI, and this SRU is base module of
725          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
726          *
727          * Easy image is..
728          *      Gen1 SRU = Gen2 SCU + SSIU + etc
729          *
730          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
731          * using fixed path.
732          */
733
734         /* SRC */
735         ret = rsnd_path_parse(priv, io, src);
736         if (ret < 0)
737                 return ret;
738
739         /* SSI */
740         ret = rsnd_path_parse(priv, io, ssi);
741         if (ret < 0)
742                 return ret;
743
744         /* DVC */
745         ret = rsnd_path_parse(priv, io, dvc);
746         if (ret < 0)
747                 return ret;
748
749         return ret;
750 }
751
752 static void rsnd_of_parse_dai(struct platform_device *pdev,
753                               const struct rsnd_of_data *of_data,
754                               struct rsnd_priv *priv)
755 {
756         struct device_node *dai_node,   *dai_np;
757         struct device_node *ssi_node,   *ssi_np;
758         struct device_node *src_node,   *src_np;
759         struct device_node *dvc_node,   *dvc_np;
760         struct device_node *playback, *capture;
761         struct rsnd_dai_platform_info *dai_info;
762         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
763         struct device *dev = &pdev->dev;
764         int nr, i;
765         int dai_i, ssi_i, src_i, dvc_i;
766
767         if (!of_data)
768                 return;
769
770         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
771         if (!dai_node)
772                 return;
773
774         nr = of_get_child_count(dai_node);
775         if (!nr)
776                 return;
777
778         dai_info = devm_kzalloc(dev,
779                                 sizeof(struct rsnd_dai_platform_info) * nr,
780                                 GFP_KERNEL);
781         if (!dai_info) {
782                 dev_err(dev, "dai info allocation error\n");
783                 return;
784         }
785
786         info->dai_info_nr       = nr;
787         info->dai_info          = dai_info;
788
789         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
790         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
791         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
792
793 #define mod_parse(name)                                                 \
794 if (name##_node) {                                                      \
795         struct rsnd_##name##_platform_info *name##_info;                \
796                                                                         \
797         name##_i = 0;                                                   \
798         for_each_child_of_node(name##_node, name##_np) {                \
799                 name##_info = info->name##_info + name##_i;             \
800                                                                         \
801                 if (name##_np == playback)                              \
802                         dai_info->playback.name = name##_info;          \
803                 if (name##_np == capture)                               \
804                         dai_info->capture.name = name##_info;           \
805                                                                         \
806                 name##_i++;                                             \
807         }                                                               \
808 }
809
810         /*
811          * parse all dai
812          */
813         dai_i = 0;
814         for_each_child_of_node(dai_node, dai_np) {
815                 dai_info = info->dai_info + dai_i;
816
817                 for (i = 0;; i++) {
818
819                         playback = of_parse_phandle(dai_np, "playback", i);
820                         capture  = of_parse_phandle(dai_np, "capture", i);
821
822                         if (!playback && !capture)
823                                 break;
824
825                         mod_parse(ssi);
826                         mod_parse(src);
827                         mod_parse(dvc);
828
829                         of_node_put(playback);
830                         of_node_put(capture);
831                 }
832
833                 dai_i++;
834         }
835 }
836
837 static int rsnd_dai_probe(struct platform_device *pdev,
838                           const struct rsnd_of_data *of_data,
839                           struct rsnd_priv *priv)
840 {
841         struct snd_soc_dai_driver *drv;
842         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
843         struct rsnd_dai *rdai;
844         struct rsnd_ssi_platform_info *pmod, *cmod;
845         struct device *dev = rsnd_priv_to_dev(priv);
846         int dai_nr;
847         int i;
848
849         rsnd_of_parse_dai(pdev, of_data, priv);
850
851         dai_nr = info->dai_info_nr;
852         if (!dai_nr) {
853                 dev_err(dev, "no dai\n");
854                 return -EIO;
855         }
856
857         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
858         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
859         if (!drv || !rdai) {
860                 dev_err(dev, "dai allocate failed\n");
861                 return -ENOMEM;
862         }
863
864         priv->rdai_nr   = dai_nr;
865         priv->daidrv    = drv;
866         priv->rdai      = rdai;
867
868         for (i = 0; i < dai_nr; i++) {
869                 rdai[i].info = &info->dai_info[i];
870
871                 pmod = rdai[i].info->playback.ssi;
872                 cmod = rdai[i].info->capture.ssi;
873
874                 /*
875                  *      init rsnd_dai
876                  */
877                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
878
879                 /*
880                  *      init snd_soc_dai_driver
881                  */
882                 drv[i].name     = rdai[i].name;
883                 drv[i].ops      = &rsnd_soc_dai_ops;
884                 if (pmod) {
885                         drv[i].playback.rates           = RSND_RATES;
886                         drv[i].playback.formats         = RSND_FMTS;
887                         drv[i].playback.channels_min    = 2;
888                         drv[i].playback.channels_max    = 2;
889
890                         rdai[i].playback.info = &info->dai_info[i].playback;
891                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
892                 }
893                 if (cmod) {
894                         drv[i].capture.rates            = RSND_RATES;
895                         drv[i].capture.formats          = RSND_FMTS;
896                         drv[i].capture.channels_min     = 2;
897                         drv[i].capture.channels_max     = 2;
898
899                         rdai[i].capture.info = &info->dai_info[i].capture;
900                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
901                 }
902
903                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
904                         pmod ? "play"    : " -- ",
905                         cmod ? "capture" : "  --   ");
906         }
907
908         return 0;
909 }
910
911 /*
912  *              pcm ops
913  */
914 static struct snd_pcm_hardware rsnd_pcm_hardware = {
915         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
916                         SNDRV_PCM_INFO_MMAP             |
917                         SNDRV_PCM_INFO_MMAP_VALID,
918         .buffer_bytes_max       = 64 * 1024,
919         .period_bytes_min       = 32,
920         .period_bytes_max       = 8192,
921         .periods_min            = 1,
922         .periods_max            = 32,
923         .fifo_size              = 256,
924 };
925
926 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
927 {
928         struct snd_pcm_runtime *runtime = substream->runtime;
929         int ret = 0;
930
931         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
932
933         ret = snd_pcm_hw_constraint_integer(runtime,
934                                             SNDRV_PCM_HW_PARAM_PERIODS);
935
936         return ret;
937 }
938
939 static int rsnd_hw_params(struct snd_pcm_substream *substream,
940                          struct snd_pcm_hw_params *hw_params)
941 {
942         return snd_pcm_lib_malloc_pages(substream,
943                                         params_buffer_bytes(hw_params));
944 }
945
946 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
947 {
948         struct snd_pcm_runtime *runtime = substream->runtime;
949         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
950         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
951         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
952
953         return bytes_to_frames(runtime, io->byte_pos);
954 }
955
956 static struct snd_pcm_ops rsnd_pcm_ops = {
957         .open           = rsnd_pcm_open,
958         .ioctl          = snd_pcm_lib_ioctl,
959         .hw_params      = rsnd_hw_params,
960         .hw_free        = snd_pcm_lib_free_pages,
961         .pointer        = rsnd_pointer,
962 };
963
964 /*
965  *              snd_soc_platform
966  */
967
968 #define PREALLOC_BUFFER         (32 * 1024)
969 #define PREALLOC_BUFFER_MAX     (32 * 1024)
970
971 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
972 {
973         struct snd_soc_dai *dai = rtd->cpu_dai;
974         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
975         int ret;
976
977         ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
978         if (ret)
979                 return ret;
980
981         ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
982         if (ret)
983                 return ret;
984
985         return snd_pcm_lib_preallocate_pages_for_all(
986                 rtd->pcm,
987                 SNDRV_DMA_TYPE_DEV,
988                 rtd->card->snd_card->dev,
989                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
990 }
991
992 static void rsnd_pcm_free(struct snd_pcm *pcm)
993 {
994         snd_pcm_lib_preallocate_free_for_all(pcm);
995 }
996
997 static struct snd_soc_platform_driver rsnd_soc_platform = {
998         .ops            = &rsnd_pcm_ops,
999         .pcm_new        = rsnd_pcm_new,
1000         .pcm_free       = rsnd_pcm_free,
1001 };
1002
1003 static const struct snd_soc_component_driver rsnd_soc_component = {
1004         .name           = "rsnd",
1005 };
1006
1007 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1008                                        struct rsnd_dai *rdai,
1009                                        int is_play)
1010 {
1011         struct rsnd_dai_stream *io = is_play ? &rdai->playback : &rdai->capture;
1012         int ret;
1013
1014         ret = rsnd_dai_call(probe, io, rdai);
1015         if (ret == -EAGAIN) {
1016                 /*
1017                  * Fallback to PIO mode
1018                  */
1019
1020                 /*
1021                  * call "remove" for SSI/SRC/DVC
1022                  * SSI will be switch to PIO mode if it was DMA mode
1023                  * see
1024                  *      rsnd_dma_init()
1025                  *      rsnd_ssi_dma_remove()
1026                  */
1027                 rsnd_dai_call(remove, io, rdai);
1028
1029                 /*
1030                  * remove SRC/DVC from DAI,
1031                  */
1032                 rsnd_path_break(priv, io, src);
1033                 rsnd_path_break(priv, io, dvc);
1034
1035                 /*
1036                  * retry to "probe".
1037                  * DAI has SSI which is PIO mode only now.
1038                  */
1039                 ret = rsnd_dai_call(probe, io, rdai);
1040         }
1041
1042         return ret;
1043 }
1044
1045 /*
1046  *      rsnd probe
1047  */
1048 static int rsnd_probe(struct platform_device *pdev)
1049 {
1050         struct rcar_snd_info *info;
1051         struct rsnd_priv *priv;
1052         struct device *dev = &pdev->dev;
1053         struct rsnd_dai *rdai;
1054         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1055         const struct rsnd_of_data *of_data;
1056         int (*probe_func[])(struct platform_device *pdev,
1057                             const struct rsnd_of_data *of_data,
1058                             struct rsnd_priv *priv) = {
1059                 rsnd_gen_probe,
1060                 rsnd_ssi_probe,
1061                 rsnd_src_probe,
1062                 rsnd_dvc_probe,
1063                 rsnd_adg_probe,
1064                 rsnd_dai_probe,
1065         };
1066         int ret, i;
1067
1068         info = NULL;
1069         of_data = NULL;
1070         if (of_id) {
1071                 info = devm_kzalloc(&pdev->dev,
1072                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1073                 of_data = of_id->data;
1074         } else {
1075                 info = pdev->dev.platform_data;
1076         }
1077
1078         if (!info) {
1079                 dev_err(dev, "driver needs R-Car sound information\n");
1080                 return -ENODEV;
1081         }
1082
1083         /*
1084          *      init priv data
1085          */
1086         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1087         if (!priv) {
1088                 dev_err(dev, "priv allocate failed\n");
1089                 return -ENODEV;
1090         }
1091
1092         priv->pdev      = pdev;
1093         priv->info      = info;
1094         spin_lock_init(&priv->lock);
1095
1096         /*
1097          *      init each module
1098          */
1099         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1100                 ret = probe_func[i](pdev, of_data, priv);
1101                 if (ret)
1102                         return ret;
1103         }
1104
1105         for_each_rsnd_dai(rdai, priv, i) {
1106                 ret = rsnd_rdai_continuance_probe(priv, rdai, 1);
1107                 if (ret)
1108                         goto exit_snd_probe;
1109
1110                 ret = rsnd_rdai_continuance_probe(priv, rdai, 0);
1111                 if (ret)
1112                         goto exit_snd_probe;
1113         }
1114
1115         /*
1116          *      asoc register
1117          */
1118         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1119         if (ret < 0) {
1120                 dev_err(dev, "cannot snd soc register\n");
1121                 return ret;
1122         }
1123
1124         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1125                                          priv->daidrv, rsnd_rdai_nr(priv));
1126         if (ret < 0) {
1127                 dev_err(dev, "cannot snd dai register\n");
1128                 goto exit_snd_soc;
1129         }
1130
1131         dev_set_drvdata(dev, priv);
1132
1133         pm_runtime_enable(dev);
1134
1135         dev_info(dev, "probed\n");
1136         return ret;
1137
1138 exit_snd_soc:
1139         snd_soc_unregister_platform(dev);
1140 exit_snd_probe:
1141         for_each_rsnd_dai(rdai, priv, i) {
1142                 rsnd_dai_call(remove, &rdai->playback, rdai);
1143                 rsnd_dai_call(remove, &rdai->capture, rdai);
1144         }
1145
1146         return ret;
1147 }
1148
1149 static int rsnd_remove(struct platform_device *pdev)
1150 {
1151         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1152         struct rsnd_dai *rdai;
1153         int ret = 0, i;
1154
1155         pm_runtime_disable(&pdev->dev);
1156
1157         for_each_rsnd_dai(rdai, priv, i) {
1158                 ret |= rsnd_dai_call(remove, &rdai->playback, rdai);
1159                 ret |= rsnd_dai_call(remove, &rdai->capture, rdai);
1160         }
1161
1162         return ret;
1163 }
1164
1165 static struct platform_driver rsnd_driver = {
1166         .driver = {
1167                 .name   = "rcar_sound",
1168                 .of_match_table = rsnd_of_match,
1169         },
1170         .probe          = rsnd_probe,
1171         .remove         = rsnd_remove,
1172 };
1173 module_platform_driver(rsnd_driver);
1174
1175 MODULE_LICENSE("GPL");
1176 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1177 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1178 MODULE_ALIAS("platform:rcar-pcm-audio");