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316d139b7176e730092fe3130fb977b498c12239
[deliverable/linux.git] / sound / soc / sh / rcar / src.c
1 /*
2 * Renesas R-Car SRC support
3 *
4 * Copyright (C) 2013 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11 #include "rsnd.h"
12
13 #define SRC_NAME "src"
14
15 /* SRCx_STATUS */
16 #define OUF_SRCO ((1 << 12) | (1 << 13))
17 #define OUF_SRCI ((1 << 9) | (1 << 8))
18
19 /* SCU_SYSTEM_STATUS0/1 */
20 #define OUF_SRC(id) ((1 << (id + 16)) | (1 << id))
21
22 struct rsnd_src {
23 struct rsnd_src_platform_info *info; /* rcar_snd.h */
24 struct rsnd_mod mod;
25 struct rsnd_kctrl_cfg_s sen; /* sync convert enable */
26 struct rsnd_kctrl_cfg_s sync; /* sync convert */
27 u32 convert_rate; /* sampling rate convert */
28 int err;
29 };
30
31 #define RSND_SRC_NAME_SIZE 16
32
33 #define rsnd_enable_sync_convert(src) ((src)->sen.val)
34 #define rsnd_src_of_node(priv) \
35 of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,src")
36
37 #define rsnd_mod_to_src(_mod) \
38 container_of((_mod), struct rsnd_src, mod)
39
40 #define for_each_rsnd_src(pos, priv, i) \
41 for ((i) = 0; \
42 ((i) < rsnd_src_nr(priv)) && \
43 ((pos) = (struct rsnd_src *)(priv)->src + i); \
44 i++)
45
46
47 /*
48 * image of SRC (Sampling Rate Converter)
49 *
50 * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
51 * 48kHz <-> | SRC | <------> | SSI | <-----> | codec |
52 * 44.1kHz <-> +-----+ +-----+ +-------+
53 * ...
54 *
55 */
56
57 /*
58 * src.c is caring...
59 *
60 * Gen1
61 *
62 * [mem] -> [SRU] -> [SSI]
63 * |--------|
64 *
65 * Gen2
66 *
67 * [mem] -> [SRC] -> [SSIU] -> [SSI]
68 * |-----------------|
69 */
70
71 /*
72 * How to use SRC bypass mode for debugging
73 *
74 * SRC has bypass mode, and it is useful for debugging.
75 * In Gen2 case,
76 * SRCm_MODE controls whether SRC is used or not
77 * SSI_MODE0 controls whether SSIU which receives SRC data
78 * is used or not.
79 * Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC,
80 * but SRC bypass mode needs SSI_MODE0 only.
81 *
82 * This driver request
83 * struct rsnd_src_platform_info {
84 * u32 convert_rate;
85 * int dma_id;
86 * }
87 *
88 * rsnd_src_convert_rate() indicates
89 * above convert_rate, and it controls
90 * whether SRC is used or not.
91 *
92 * ex) doesn't use SRC
93 * static struct rsnd_dai_platform_info rsnd_dai = {
94 * .playback = { .ssi = &rsnd_ssi[0], },
95 * };
96 *
97 * ex) uses SRC
98 * static struct rsnd_src_platform_info rsnd_src[] = {
99 * RSND_SCU(48000, 0),
100 * ...
101 * };
102 * static struct rsnd_dai_platform_info rsnd_dai = {
103 * .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] },
104 * };
105 *
106 * ex) uses SRC bypass mode
107 * static struct rsnd_src_platform_info rsnd_src[] = {
108 * RSND_SCU(0, 0),
109 * ...
110 * };
111 * static struct rsnd_dai_platform_info rsnd_dai = {
112 * .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] },
113 * };
114 *
115 */
116
117 /*
118 * Gen1/Gen2 common functions
119 */
120 static struct dma_chan *rsnd_src_dma_req(struct rsnd_mod *mod)
121 {
122 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
123 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
124 int is_play = rsnd_io_is_play(io);
125
126 return rsnd_dma_request_channel(rsnd_src_of_node(priv),
127 mod,
128 is_play ? "rx" : "tx");
129 }
130
131 int rsnd_src_ssiu_start(struct rsnd_mod *ssi_mod,
132 int use_busif)
133 {
134 struct rsnd_dai_stream *io = rsnd_mod_to_io(ssi_mod);
135 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
136 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
137 int ssi_id = rsnd_mod_id(ssi_mod);
138
139 /*
140 * SSI_MODE0
141 */
142 rsnd_mod_bset(ssi_mod, SSI_MODE0, (1 << ssi_id),
143 !use_busif << ssi_id);
144
145 /*
146 * SSI_MODE1
147 */
148 if (rsnd_ssi_is_pin_sharing(ssi_mod)) {
149 int shift = -1;
150 switch (ssi_id) {
151 case 1:
152 shift = 0;
153 break;
154 case 2:
155 shift = 2;
156 break;
157 case 4:
158 shift = 16;
159 break;
160 }
161
162 if (shift >= 0)
163 rsnd_mod_bset(ssi_mod, SSI_MODE1,
164 0x3 << shift,
165 rsnd_rdai_is_clk_master(rdai) ?
166 0x2 << shift : 0x1 << shift);
167 }
168
169 /*
170 * DMA settings for SSIU
171 */
172 if (use_busif) {
173 u32 val = 0x76543210;
174 u32 mask = ~0;
175
176 rsnd_mod_write(ssi_mod, SSI_BUSIF_ADINR,
177 rsnd_get_adinr(ssi_mod));
178 rsnd_mod_write(ssi_mod, SSI_BUSIF_MODE, 1);
179 rsnd_mod_write(ssi_mod, SSI_CTRL, 0x1);
180
181 mask <<= runtime->channels * 4;
182 val = val & mask;
183
184 switch (runtime->sample_bits) {
185 case 16:
186 val |= 0x67452301 & ~mask;
187 break;
188 case 32:
189 val |= 0x76543210 & ~mask;
190 break;
191 }
192 rsnd_mod_write(ssi_mod, BUSIF_DALIGN, val);
193
194 }
195
196 return 0;
197 }
198
199 int rsnd_src_ssiu_stop(struct rsnd_mod *ssi_mod)
200 {
201 /*
202 * DMA settings for SSIU
203 */
204 rsnd_mod_write(ssi_mod, SSI_CTRL, 0);
205
206 return 0;
207 }
208
209 int rsnd_src_ssi_irq_enable(struct rsnd_mod *ssi_mod)
210 {
211 struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
212
213 if (rsnd_is_gen1(priv))
214 return 0;
215
216 /* enable SSI interrupt if Gen2 */
217 if (rsnd_ssi_is_dma_mode(ssi_mod))
218 rsnd_mod_write(ssi_mod, INT_ENABLE, 0x0e000000);
219 else
220 rsnd_mod_write(ssi_mod, INT_ENABLE, 0x0f000000);
221
222 return 0;
223 }
224
225 int rsnd_src_ssi_irq_disable(struct rsnd_mod *ssi_mod)
226 {
227 struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
228
229 if (rsnd_is_gen1(priv))
230 return 0;
231
232 /* disable SSI interrupt if Gen2 */
233 rsnd_mod_write(ssi_mod, INT_ENABLE, 0x00000000);
234
235 return 0;
236 }
237
238 static u32 rsnd_src_convert_rate(struct rsnd_src *src)
239 {
240 struct rsnd_mod *mod = &src->mod;
241 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
242 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
243 u32 convert_rate;
244
245 if (!runtime)
246 return 0;
247
248 if (!rsnd_enable_sync_convert(src))
249 return src->convert_rate;
250
251 convert_rate = src->sync.val;
252
253 if (!convert_rate)
254 convert_rate = src->convert_rate;
255
256 if (!convert_rate)
257 convert_rate = runtime->rate;
258
259 return convert_rate;
260 }
261
262 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv *priv,
263 struct rsnd_dai_stream *io,
264 struct snd_pcm_runtime *runtime)
265 {
266 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
267 struct rsnd_src *src;
268 unsigned int rate = 0;
269
270 if (src_mod) {
271 src = rsnd_mod_to_src(src_mod);
272
273 /*
274 * return convert rate if SRC is used,
275 * otherwise, return runtime->rate as usual
276 */
277 rate = rsnd_src_convert_rate(src);
278 }
279
280 if (!rate)
281 rate = runtime->rate;
282
283 return rate;
284 }
285
286 static int rsnd_src_set_convert_rate(struct rsnd_mod *mod)
287 {
288 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
289 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
290 struct rsnd_src *src = rsnd_mod_to_src(mod);
291 u32 convert_rate = rsnd_src_convert_rate(src);
292 u32 fsrate = 0;
293
294 if (convert_rate)
295 fsrate = 0x0400000 / convert_rate * runtime->rate;
296
297 /* set/clear soft reset */
298 rsnd_mod_write(mod, SRC_SWRSR, 0);
299 rsnd_mod_write(mod, SRC_SWRSR, 1);
300
301 /* Set channel number and output bit length */
302 rsnd_mod_write(mod, SRC_ADINR, rsnd_get_adinr(mod));
303
304 /* Enable the initial value of IFS */
305 if (fsrate) {
306 rsnd_mod_write(mod, SRC_IFSCR, 1);
307
308 /* Set initial value of IFS */
309 rsnd_mod_write(mod, SRC_IFSVR, fsrate);
310 }
311
312 /* use DMA transfer */
313 rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);
314
315 return 0;
316 }
317
318 static int rsnd_src_hw_params(struct rsnd_mod *mod,
319 struct snd_pcm_substream *substream,
320 struct snd_pcm_hw_params *fe_params)
321 {
322 struct rsnd_src *src = rsnd_mod_to_src(mod);
323 struct snd_soc_pcm_runtime *fe = substream->private_data;
324
325 /* default value (mainly for non-DT) */
326 src->convert_rate = src->info->convert_rate;
327
328 /*
329 * SRC assumes that it is used under DPCM if user want to use
330 * sampling rate convert. Then, SRC should be FE.
331 * And then, this function will be called *after* BE settings.
332 * this means, each BE already has fixuped hw_params.
333 * see
334 * dpcm_fe_dai_hw_params()
335 * dpcm_be_dai_hw_params()
336 */
337 if (fe->dai_link->dynamic) {
338 int stream = substream->stream;
339 struct snd_soc_dpcm *dpcm;
340 struct snd_pcm_hw_params *be_params;
341
342 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
343 be_params = &dpcm->hw_params;
344
345 if (params_rate(fe_params) != params_rate(be_params))
346 src->convert_rate = params_rate(be_params);
347 }
348 }
349
350 return 0;
351 }
352
353 static int rsnd_src_init(struct rsnd_mod *mod,
354 struct rsnd_priv *priv)
355 {
356 struct rsnd_src *src = rsnd_mod_to_src(mod);
357
358 rsnd_mod_hw_start(mod);
359
360 src->err = 0;
361
362 /* reset sync convert_rate */
363 src->sync.val = 0;
364
365 /*
366 * Initialize the operation of the SRC internal circuits
367 * see rsnd_src_start()
368 */
369 rsnd_mod_write(mod, SRC_SRCIR, 1);
370
371 return 0;
372 }
373
374 static int rsnd_src_quit(struct rsnd_mod *mod,
375 struct rsnd_priv *priv)
376 {
377 struct rsnd_src *src = rsnd_mod_to_src(mod);
378 struct device *dev = rsnd_priv_to_dev(priv);
379
380 rsnd_mod_hw_stop(mod);
381
382 if (src->err)
383 dev_warn(dev, "%s[%d] under/over flow err = %d\n",
384 rsnd_mod_name(mod), rsnd_mod_id(mod), src->err);
385
386 src->convert_rate = 0;
387
388 /* reset sync convert_rate */
389 src->sync.val = 0;
390
391 return 0;
392 }
393
394 static int rsnd_src_start(struct rsnd_mod *mod)
395 {
396 /*
397 * Cancel the initialization and operate the SRC function
398 * see rsnd_src_init()
399 */
400 rsnd_mod_write(mod, SRC_SRCIR, 0);
401
402 return 0;
403 }
404
405 static int rsnd_src_stop(struct rsnd_mod *mod)
406 {
407 /* nothing to do */
408 return 0;
409 }
410
411 /*
412 * Gen1 functions
413 */
414 static int rsnd_src_set_route_gen1(struct rsnd_mod *mod)
415 {
416 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
417 struct src_route_config {
418 u32 mask;
419 int shift;
420 } routes[] = {
421 { 0xF, 0, }, /* 0 */
422 { 0xF, 4, }, /* 1 */
423 { 0xF, 8, }, /* 2 */
424 { 0x7, 12, }, /* 3 */
425 { 0x7, 16, }, /* 4 */
426 { 0x7, 20, }, /* 5 */
427 { 0x7, 24, }, /* 6 */
428 { 0x3, 28, }, /* 7 */
429 { 0x3, 30, }, /* 8 */
430 };
431 u32 mask;
432 u32 val;
433 int id;
434
435 id = rsnd_mod_id(mod);
436 if (id < 0 || id >= ARRAY_SIZE(routes))
437 return -EIO;
438
439 /*
440 * SRC_ROUTE_SELECT
441 */
442 val = rsnd_io_is_play(io) ? 0x1 : 0x2;
443 val = val << routes[id].shift;
444 mask = routes[id].mask << routes[id].shift;
445
446 rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
447
448 return 0;
449 }
450
451 static int rsnd_src_set_convert_timing_gen1(struct rsnd_mod *mod)
452 {
453 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
454 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
455 struct rsnd_src *src = rsnd_mod_to_src(mod);
456 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
457 u32 convert_rate = rsnd_src_convert_rate(src);
458 u32 mask;
459 u32 val;
460 int shift;
461 int id = rsnd_mod_id(mod);
462 int ret;
463
464 /*
465 * SRC_TIMING_SELECT
466 */
467 shift = (id % 4) * 8;
468 mask = 0x1F << shift;
469
470 /*
471 * ADG is used as source clock if SRC was used,
472 * then, SSI WS is used as destination clock.
473 * SSI WS is used as source clock if SRC is not used
474 * (when playback, source/destination become reverse when capture)
475 */
476 ret = 0;
477 if (convert_rate) {
478 /* use ADG */
479 val = 0;
480 ret = rsnd_adg_set_convert_clk_gen1(priv, mod,
481 runtime->rate,
482 convert_rate);
483 } else if (8 == id) {
484 /* use SSI WS, but SRU8 is special */
485 val = id << shift;
486 } else {
487 /* use SSI WS */
488 val = (id + 1) << shift;
489 }
490
491 if (ret < 0)
492 return ret;
493
494 switch (id / 4) {
495 case 0:
496 rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
497 break;
498 case 1:
499 rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
500 break;
501 case 2:
502 rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
503 break;
504 }
505
506 return 0;
507 }
508
509 static int rsnd_src_set_convert_rate_gen1(struct rsnd_mod *mod)
510 {
511 struct rsnd_src *src = rsnd_mod_to_src(mod);
512 int ret;
513
514 ret = rsnd_src_set_convert_rate(mod);
515 if (ret < 0)
516 return ret;
517
518 /* Select SRC mode (fixed value) */
519 rsnd_mod_write(mod, SRC_SRCCR, 0x00010110);
520
521 /* Set the restriction value of the FS ratio (98%) */
522 rsnd_mod_write(mod, SRC_MNFSR,
523 rsnd_mod_read(mod, SRC_IFSVR) / 100 * 98);
524
525 /* Gen1/Gen2 are not compatible */
526 if (rsnd_src_convert_rate(src))
527 rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
528
529 /* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
530
531 return 0;
532 }
533
534 static int rsnd_src_init_gen1(struct rsnd_mod *mod,
535 struct rsnd_priv *priv)
536 {
537 int ret;
538
539 ret = rsnd_src_init(mod, priv);
540 if (ret < 0)
541 return ret;
542
543 ret = rsnd_src_set_route_gen1(mod);
544 if (ret < 0)
545 return ret;
546
547 ret = rsnd_src_set_convert_rate_gen1(mod);
548 if (ret < 0)
549 return ret;
550
551 ret = rsnd_src_set_convert_timing_gen1(mod);
552 if (ret < 0)
553 return ret;
554
555 return 0;
556 }
557
558 static int rsnd_src_start_gen1(struct rsnd_mod *mod,
559 struct rsnd_priv *priv)
560 {
561 int id = rsnd_mod_id(mod);
562
563 rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));
564
565 return rsnd_src_start(mod);
566 }
567
568 static int rsnd_src_stop_gen1(struct rsnd_mod *mod,
569 struct rsnd_priv *priv)
570 {
571 int id = rsnd_mod_id(mod);
572
573 rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);
574
575 return rsnd_src_stop(mod);
576 }
577
578 static struct rsnd_mod_ops rsnd_src_gen1_ops = {
579 .name = SRC_NAME,
580 .dma_req = rsnd_src_dma_req,
581 .init = rsnd_src_init_gen1,
582 .quit = rsnd_src_quit,
583 .start = rsnd_src_start_gen1,
584 .stop = rsnd_src_stop_gen1,
585 .hw_params = rsnd_src_hw_params,
586 };
587
588 /*
589 * Gen2 functions
590 */
591 #define rsnd_src_irq_enable_gen2(mod) rsnd_src_irq_ctrol_gen2(mod, 1)
592 #define rsnd_src_irq_disable_gen2(mod) rsnd_src_irq_ctrol_gen2(mod, 0)
593 static void rsnd_src_irq_ctrol_gen2(struct rsnd_mod *mod, int enable)
594 {
595 struct rsnd_src *src = rsnd_mod_to_src(mod);
596 u32 sys_int_val, int_val, sys_int_mask;
597 int irq = src->info->irq;
598 int id = rsnd_mod_id(mod);
599
600 sys_int_val =
601 sys_int_mask = OUF_SRC(id);
602 int_val = 0x3300;
603
604 /*
605 * IRQ is not supported on non-DT
606 * see
607 * rsnd_src_probe_gen2()
608 */
609 if ((irq <= 0) || !enable) {
610 sys_int_val = 0;
611 int_val = 0;
612 }
613
614 rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val);
615 rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val);
616 rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val);
617 }
618
619 static void rsnd_src_error_clear_gen2(struct rsnd_mod *mod)
620 {
621 u32 val = OUF_SRC(rsnd_mod_id(mod));
622
623 rsnd_mod_bset(mod, SCU_SYS_STATUS0, val, val);
624 rsnd_mod_bset(mod, SCU_SYS_STATUS1, val, val);
625 }
626
627 static bool rsnd_src_error_record_gen2(struct rsnd_mod *mod)
628 {
629 u32 val = OUF_SRC(rsnd_mod_id(mod));
630 bool ret = false;
631
632 if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val) ||
633 (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val)) {
634 struct rsnd_src *src = rsnd_mod_to_src(mod);
635
636 src->err++;
637 ret = true;
638 }
639
640 /* clear error static */
641 rsnd_src_error_clear_gen2(mod);
642
643 return ret;
644 }
645
646 static int _rsnd_src_start_gen2(struct rsnd_mod *mod)
647 {
648 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
649 u32 val = rsnd_io_to_mod_dvc(io) ? 0x01 : 0x11;
650
651 rsnd_mod_write(mod, SRC_CTRL, val);
652
653 rsnd_src_error_clear_gen2(mod);
654
655 rsnd_src_start(mod);
656
657 rsnd_src_irq_enable_gen2(mod);
658
659 return 0;
660 }
661
662 static int _rsnd_src_stop_gen2(struct rsnd_mod *mod)
663 {
664 rsnd_src_irq_disable_gen2(mod);
665
666 rsnd_mod_write(mod, SRC_CTRL, 0);
667
668 rsnd_src_error_record_gen2(mod);
669
670 return rsnd_src_stop(mod);
671 }
672
673 static irqreturn_t rsnd_src_interrupt_gen2(int irq, void *data)
674 {
675 struct rsnd_mod *mod = data;
676 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
677
678 spin_lock(&priv->lock);
679
680 /* ignore all cases if not working */
681 if (!rsnd_mod_is_working(mod))
682 goto rsnd_src_interrupt_gen2_out;
683
684 if (rsnd_src_error_record_gen2(mod)) {
685 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
686 struct rsnd_src *src = rsnd_mod_to_src(mod);
687 struct device *dev = rsnd_priv_to_dev(priv);
688
689 dev_dbg(dev, "%s[%d] restart\n",
690 rsnd_mod_name(mod), rsnd_mod_id(mod));
691
692 _rsnd_src_stop_gen2(mod);
693 if (src->err < 1024)
694 _rsnd_src_start_gen2(mod);
695 else
696 dev_warn(dev, "no more SRC restart\n");
697 }
698 rsnd_src_interrupt_gen2_out:
699 spin_unlock(&priv->lock);
700
701 return IRQ_HANDLED;
702 }
703
704 static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod *mod)
705 {
706 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
707 struct device *dev = rsnd_priv_to_dev(priv);
708 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
709 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
710 struct rsnd_src *src = rsnd_mod_to_src(mod);
711 u32 convert_rate = rsnd_src_convert_rate(src);
712 u32 cr, route;
713 uint ratio;
714 int ret;
715
716 /* 6 - 1/6 are very enough ratio for SRC_BSDSR */
717 if (!convert_rate)
718 ratio = 0;
719 else if (convert_rate > runtime->rate)
720 ratio = 100 * convert_rate / runtime->rate;
721 else
722 ratio = 100 * runtime->rate / convert_rate;
723
724 if (ratio > 600) {
725 dev_err(dev, "FSO/FSI ratio error\n");
726 return -EINVAL;
727 }
728
729 ret = rsnd_src_set_convert_rate(mod);
730 if (ret < 0)
731 return ret;
732
733 cr = 0x00011110;
734 route = 0x0;
735 if (convert_rate) {
736 route = 0x1;
737
738 if (rsnd_enable_sync_convert(src)) {
739 cr |= 0x1;
740 route |= rsnd_io_is_play(io) ?
741 (0x1 << 24) : (0x1 << 25);
742 }
743 }
744
745 rsnd_mod_write(mod, SRC_SRCCR, cr);
746 rsnd_mod_write(mod, SRC_ROUTE_MODE0, route);
747
748 switch (rsnd_mod_id(mod)) {
749 case 5:
750 case 6:
751 case 7:
752 case 8:
753 rsnd_mod_write(mod, SRC_BSDSR, 0x02400000);
754 break;
755 default:
756 rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);
757 break;
758 }
759
760 rsnd_mod_write(mod, SRC_BSISR, 0x00100060);
761
762 return 0;
763 }
764
765 static int rsnd_src_set_convert_timing_gen2(struct rsnd_mod *mod)
766 {
767 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
768 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
769 struct rsnd_src *src = rsnd_mod_to_src(mod);
770 u32 convert_rate = rsnd_src_convert_rate(src);
771 int ret;
772
773 if (convert_rate)
774 ret = rsnd_adg_set_convert_clk_gen2(mod, io,
775 runtime->rate,
776 convert_rate);
777 else
778 ret = rsnd_adg_set_convert_timing_gen2(mod, io);
779
780 return ret;
781 }
782
783 static int rsnd_src_probe_gen2(struct rsnd_mod *mod,
784 struct rsnd_priv *priv)
785 {
786 struct rsnd_src *src = rsnd_mod_to_src(mod);
787 struct device *dev = rsnd_priv_to_dev(priv);
788 int irq = src->info->irq;
789 int ret;
790
791 if (irq > 0) {
792 /*
793 * IRQ is not supported on non-DT
794 * see
795 * rsnd_src_irq_enable_gen2()
796 */
797 ret = devm_request_irq(dev, irq,
798 rsnd_src_interrupt_gen2,
799 IRQF_SHARED,
800 dev_name(dev), mod);
801 if (ret)
802 return ret;
803 }
804
805 ret = rsnd_dma_init(priv,
806 rsnd_mod_to_dma(mod),
807 src->info->dma_id);
808
809 return ret;
810 }
811
812 static int rsnd_src_remove_gen2(struct rsnd_mod *mod,
813 struct rsnd_priv *priv)
814 {
815 rsnd_dma_quit(rsnd_mod_to_dma(mod));
816
817 return 0;
818 }
819
820 static int rsnd_src_init_gen2(struct rsnd_mod *mod,
821 struct rsnd_priv *priv)
822 {
823 int ret;
824
825 ret = rsnd_src_init(mod, priv);
826 if (ret < 0)
827 return ret;
828
829 ret = rsnd_src_set_convert_rate_gen2(mod);
830 if (ret < 0)
831 return ret;
832
833 ret = rsnd_src_set_convert_timing_gen2(mod);
834 if (ret < 0)
835 return ret;
836
837 return 0;
838 }
839
840 static int rsnd_src_start_gen2(struct rsnd_mod *mod,
841 struct rsnd_priv *priv)
842 {
843 rsnd_dma_start(rsnd_mod_to_dma(mod));
844
845 return _rsnd_src_start_gen2(mod);
846 }
847
848 static int rsnd_src_stop_gen2(struct rsnd_mod *mod,
849 struct rsnd_priv *priv)
850 {
851 int ret;
852
853 ret = _rsnd_src_stop_gen2(mod);
854
855 rsnd_dma_stop(rsnd_mod_to_dma(mod));
856
857 return ret;
858 }
859
860 static void rsnd_src_reconvert_update(struct rsnd_mod *mod)
861 {
862 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
863 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
864 struct rsnd_src *src = rsnd_mod_to_src(mod);
865 u32 convert_rate = rsnd_src_convert_rate(src);
866 u32 fsrate;
867
868 if (!runtime)
869 return;
870
871 if (!convert_rate)
872 convert_rate = runtime->rate;
873
874 fsrate = 0x0400000 / convert_rate * runtime->rate;
875
876 /* update IFS */
877 rsnd_mod_write(mod, SRC_IFSVR, fsrate);
878 }
879
880 static int rsnd_src_pcm_new(struct rsnd_mod *mod,
881 struct snd_soc_pcm_runtime *rtd)
882 {
883 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
884 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
885 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
886 struct rsnd_src *src = rsnd_mod_to_src(mod);
887 int ret;
888
889 /*
890 * enable SRC sync convert if possible
891 */
892
893 /*
894 * Gen1 is not supported
895 */
896 if (rsnd_is_gen1(priv))
897 return 0;
898
899 /*
900 * SRC sync convert needs clock master
901 */
902 if (!rsnd_rdai_is_clk_master(rdai))
903 return 0;
904
905 /*
906 * We can't use SRC sync convert
907 * if it has DVC
908 */
909 if (rsnd_io_to_mod_dvc(io))
910 return 0;
911
912 /*
913 * enable sync convert
914 */
915 ret = rsnd_kctrl_new_s(mod, rtd,
916 rsnd_io_is_play(io) ?
917 "SRC Out Rate Switch" :
918 "SRC In Rate Switch",
919 rsnd_src_reconvert_update,
920 &src->sen, 1);
921 if (ret < 0)
922 return ret;
923
924 ret = rsnd_kctrl_new_s(mod, rtd,
925 rsnd_io_is_play(io) ?
926 "SRC Out Rate" :
927 "SRC In Rate",
928 rsnd_src_reconvert_update,
929 &src->sync, 192000);
930
931 return ret;
932 }
933
934 static struct rsnd_mod_ops rsnd_src_gen2_ops = {
935 .name = SRC_NAME,
936 .dma_req = rsnd_src_dma_req,
937 .probe = rsnd_src_probe_gen2,
938 .remove = rsnd_src_remove_gen2,
939 .init = rsnd_src_init_gen2,
940 .quit = rsnd_src_quit,
941 .start = rsnd_src_start_gen2,
942 .stop = rsnd_src_stop_gen2,
943 .hw_params = rsnd_src_hw_params,
944 .pcm_new = rsnd_src_pcm_new,
945 };
946
947 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)
948 {
949 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv)))
950 id = 0;
951
952 return &((struct rsnd_src *)(priv->src) + id)->mod;
953 }
954
955 static void rsnd_of_parse_src(struct platform_device *pdev,
956 const struct rsnd_of_data *of_data,
957 struct rsnd_priv *priv)
958 {
959 struct device_node *src_node;
960 struct device_node *np;
961 struct rcar_snd_info *info = rsnd_priv_to_info(priv);
962 struct rsnd_src_platform_info *src_info;
963 struct device *dev = &pdev->dev;
964 int nr, i;
965
966 if (!of_data)
967 return;
968
969 src_node = rsnd_src_of_node(priv);
970 if (!src_node)
971 return;
972
973 nr = of_get_child_count(src_node);
974 if (!nr)
975 goto rsnd_of_parse_src_end;
976
977 src_info = devm_kzalloc(dev,
978 sizeof(struct rsnd_src_platform_info) * nr,
979 GFP_KERNEL);
980 if (!src_info) {
981 dev_err(dev, "src info allocation error\n");
982 goto rsnd_of_parse_src_end;
983 }
984
985 info->src_info = src_info;
986 info->src_info_nr = nr;
987
988 i = 0;
989 for_each_child_of_node(src_node, np) {
990 src_info[i].irq = irq_of_parse_and_map(np, 0);
991
992 i++;
993 }
994
995 rsnd_of_parse_src_end:
996 of_node_put(src_node);
997 }
998
999 int rsnd_src_probe(struct platform_device *pdev,
1000 const struct rsnd_of_data *of_data,
1001 struct rsnd_priv *priv)
1002 {
1003 struct rcar_snd_info *info = rsnd_priv_to_info(priv);
1004 struct device *dev = rsnd_priv_to_dev(priv);
1005 struct rsnd_src *src;
1006 struct rsnd_mod_ops *ops;
1007 struct clk *clk;
1008 char name[RSND_SRC_NAME_SIZE];
1009 int i, nr, ret;
1010
1011 ops = NULL;
1012 if (rsnd_is_gen1(priv))
1013 ops = &rsnd_src_gen1_ops;
1014 if (rsnd_is_gen2(priv))
1015 ops = &rsnd_src_gen2_ops;
1016 if (!ops) {
1017 dev_err(dev, "unknown Generation\n");
1018 return -EIO;
1019 }
1020
1021 rsnd_of_parse_src(pdev, of_data, priv);
1022
1023 /*
1024 * init SRC
1025 */
1026 nr = info->src_info_nr;
1027 if (!nr)
1028 return 0;
1029
1030 src = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL);
1031 if (!src) {
1032 dev_err(dev, "SRC allocate failed\n");
1033 return -ENOMEM;
1034 }
1035
1036 priv->src_nr = nr;
1037 priv->src = src;
1038
1039 for_each_rsnd_src(src, priv, i) {
1040 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d",
1041 SRC_NAME, i);
1042
1043 clk = devm_clk_get(dev, name);
1044 if (IS_ERR(clk))
1045 return PTR_ERR(clk);
1046
1047 src->info = &info->src_info[i];
1048
1049 ret = rsnd_mod_init(priv, &src->mod, ops, clk, RSND_MOD_SRC, i);
1050 if (ret)
1051 return ret;
1052 }
1053
1054 return 0;
1055 }
1056
1057 void rsnd_src_remove(struct platform_device *pdev,
1058 struct rsnd_priv *priv)
1059 {
1060 struct rsnd_src *src;
1061 int i;
1062
1063 for_each_rsnd_src(src, priv, i) {
1064 rsnd_mod_quit(&src->mod);
1065 }
1066 }
Linux kernel - Deliverables
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