2 * Renesas R-Car SRC support
4 * Copyright (C) 2013 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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.
14 struct rsnd_src_platform_info
*info
; /* rcar_snd.h */
19 #define RSND_SRC_NAME_SIZE 16
24 #define OTBL_24 (0 << 16)
25 #define OTBL_22 (2 << 16)
26 #define OTBL_20 (4 << 16)
27 #define OTBL_18 (6 << 16)
28 #define OTBL_16 (8 << 16)
30 #define rsnd_src_mode_flags(p) ((p)->info->flags)
31 #define rsnd_src_convert_rate(p) ((p)->info->convert_rate)
32 #define rsnd_mod_to_src(_mod) \
33 container_of((_mod), struct rsnd_src, mod)
34 #define rsnd_src_hpbif_is_enable(src) \
35 (rsnd_src_mode_flags(src) & RSND_SCU_USE_HPBIF)
36 #define rsnd_src_dma_available(src) \
37 rsnd_dma_available(rsnd_mod_to_dma(&(src)->mod))
39 #define for_each_rsnd_src(pos, priv, i) \
41 ((i) < rsnd_src_nr(priv)) && \
42 ((pos) = (struct rsnd_src *)(priv)->src + i); \
47 * image of SRC (Sampling Rate Converter)
49 * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
50 * 48kHz <-> | SRC | <------> | SSI | <-----> | codec |
51 * 44.1kHz <-> +-----+ +-----+ +-------+
61 * [mem] -> [SRU] -> [SSI]
66 * [mem] -> [SRC] -> [SSIU] -> [SSI]
71 * How to use SRC bypass mode for debugging
73 * SRC has bypass mode, and it is useful for debugging.
75 * SRCm_MODE controls whether SRC is used or not
76 * SSI_MODE0 controls whether SSIU which receives SRC data
78 * Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC,
79 * but SRC bypass mode needs SSI_MODE0 only.
82 * struct rsnd_src_platform_info {
87 * rsnd_src_hpbif_is_enable() will be true
88 * if flags had RSND_SRC_USE_HPBIF,
89 * and it controls whether SSIU is used or not.
91 * rsnd_src_convert_rate() indicates
92 * above convert_rate, and it controls
93 * whether SRC is used or not.
96 * struct rsnd_src_platform_info info = {
102 * struct rsnd_src_platform_info info = {
103 * .flags = RSND_SRC_USE_HPBIF,
104 * .convert_rate = 48000,
107 * ex) uses SRC bypass mode
108 * struct rsnd_src_platform_info info = {
109 * .flags = RSND_SRC_USE_HPBIF,
116 * Gen1/Gen2 common functions
118 int rsnd_src_ssi_mode_init(struct rsnd_mod
*ssi_mod
,
119 struct rsnd_dai
*rdai
,
120 struct rsnd_dai_stream
*io
)
122 struct rsnd_priv
*priv
= rsnd_mod_to_priv(ssi_mod
);
123 struct rsnd_mod
*src_mod
= rsnd_io_to_mod_src(io
);
124 struct rcar_snd_info
*info
= rsnd_priv_to_info(priv
);
125 int ssi_id
= rsnd_mod_id(ssi_mod
);
131 if (info
->dai_info
) {
134 struct rsnd_src
*src
= rsnd_mod_to_src(src_mod
);
135 has_src
= rsnd_src_hpbif_is_enable(src
);
138 rsnd_mod_bset(ssi_mod
, SSI_MODE0
, (1 << ssi_id
),
139 has_src
? 0 : (1 << ssi_id
));
144 if (rsnd_ssi_is_pin_sharing(ssi_mod
)) {
159 rsnd_mod_bset(ssi_mod
, SSI_MODE1
,
161 rsnd_dai_is_clk_master(rdai
) ?
162 0x2 << shift
: 0x1 << shift
);
168 int rsnd_src_enable_ssi_irq(struct rsnd_mod
*ssi_mod
,
169 struct rsnd_dai
*rdai
,
170 struct rsnd_dai_stream
*io
)
172 struct rsnd_priv
*priv
= rsnd_mod_to_priv(ssi_mod
);
174 /* enable PIO interrupt if Gen2 */
175 if (rsnd_is_gen2(priv
))
176 rsnd_mod_write(ssi_mod
, INT_ENABLE
, 0x0f000000);
181 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv
*priv
,
182 struct rsnd_dai_stream
*io
,
183 struct snd_pcm_runtime
*runtime
)
185 struct rsnd_mod
*src_mod
= rsnd_io_to_mod_src(io
);
186 struct rsnd_src
*src
;
187 unsigned int rate
= 0;
190 src
= rsnd_mod_to_src(src_mod
);
193 * return convert rate if SRC is used,
194 * otherwise, return runtime->rate as usual
196 rate
= rsnd_src_convert_rate(src
);
200 rate
= runtime
->rate
;
205 static int rsnd_src_set_convert_rate(struct rsnd_mod
*mod
,
206 struct rsnd_dai
*rdai
,
207 struct rsnd_dai_stream
*io
)
209 struct snd_pcm_runtime
*runtime
= rsnd_io_to_runtime(io
);
210 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
211 u32 convert_rate
= rsnd_src_convert_rate(src
);
212 u32 adinr
= runtime
->channels
;
216 fsrate
= 0x0400000 / convert_rate
* runtime
->rate
;
218 /* set/clear soft reset */
219 rsnd_mod_write(mod
, SRC_SWRSR
, 0);
220 rsnd_mod_write(mod
, SRC_SWRSR
, 1);
223 * Initialize the operation of the SRC internal circuits
224 * see rsnd_src_start()
226 rsnd_mod_write(mod
, SRC_SRCIR
, 1);
228 /* Set channel number and output bit length */
229 switch (runtime
->sample_bits
) {
239 rsnd_mod_write(mod
, SRC_ADINR
, adinr
);
241 /* Enable the initial value of IFS */
243 rsnd_mod_write(mod
, SRC_IFSCR
, 1);
245 /* Set initial value of IFS */
246 rsnd_mod_write(mod
, SRC_IFSVR
, fsrate
);
249 /* use DMA transfer */
250 rsnd_mod_write(mod
, SRC_BUSIF_MODE
, 1);
255 static int rsnd_src_init(struct rsnd_mod
*mod
,
256 struct rsnd_dai
*rdai
,
257 struct rsnd_dai_stream
*io
)
259 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
261 clk_enable(src
->clk
);
266 static int rsnd_src_quit(struct rsnd_mod
*mod
,
267 struct rsnd_dai
*rdai
,
268 struct rsnd_dai_stream
*io
)
270 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
272 clk_disable(src
->clk
);
277 static int rsnd_src_start(struct rsnd_mod
*mod
,
278 struct rsnd_dai
*rdai
,
279 struct rsnd_dai_stream
*io
)
281 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
284 * Cancel the initialization and operate the SRC function
285 * see rsnd_src_set_convert_rate()
287 rsnd_mod_write(mod
, SRC_SRCIR
, 0);
289 if (rsnd_src_convert_rate(src
))
290 rsnd_mod_write(mod
, SRC_ROUTE_MODE0
, 1);
296 static int rsnd_src_stop(struct rsnd_mod
*mod
,
297 struct rsnd_dai
*rdai
,
298 struct rsnd_dai_stream
*io
)
300 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
302 if (rsnd_src_convert_rate(src
))
303 rsnd_mod_write(mod
, SRC_ROUTE_MODE0
, 0);
308 static struct rsnd_mod_ops rsnd_src_non_ops
= {
315 static int rsnd_src_set_route_gen1(struct rsnd_mod
*mod
,
316 struct rsnd_dai
*rdai
,
317 struct rsnd_dai_stream
*io
)
319 struct src_route_config
{
326 { 0x7, 12, }, /* 3 */
327 { 0x7, 16, }, /* 4 */
328 { 0x7, 20, }, /* 5 */
329 { 0x7, 24, }, /* 6 */
330 { 0x3, 28, }, /* 7 */
331 { 0x3, 30, }, /* 8 */
337 id
= rsnd_mod_id(mod
);
338 if (id
< 0 || id
>= ARRAY_SIZE(routes
))
344 val
= rsnd_dai_is_play(rdai
, io
) ? 0x1 : 0x2;
345 val
= val
<< routes
[id
].shift
;
346 mask
= routes
[id
].mask
<< routes
[id
].shift
;
348 rsnd_mod_bset(mod
, SRC_ROUTE_SEL
, mask
, val
);
353 static int rsnd_src_set_convert_timing_gen1(struct rsnd_mod
*mod
,
354 struct rsnd_dai
*rdai
,
355 struct rsnd_dai_stream
*io
)
357 struct rsnd_priv
*priv
= rsnd_mod_to_priv(mod
);
358 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
359 struct snd_pcm_runtime
*runtime
= rsnd_io_to_runtime(io
);
360 u32 convert_rate
= rsnd_src_convert_rate(src
);
364 int id
= rsnd_mod_id(mod
);
370 shift
= (id
% 4) * 8;
371 mask
= 0x1F << shift
;
374 * ADG is used as source clock if SRC was used,
375 * then, SSI WS is used as destination clock.
376 * SSI WS is used as source clock if SRC is not used
377 * (when playback, source/destination become reverse when capture)
383 ret
= rsnd_adg_set_convert_clk_gen1(priv
, mod
,
386 } else if (8 == id
) {
387 /* use SSI WS, but SRU8 is special */
391 val
= (id
+ 1) << shift
;
399 rsnd_mod_bset(mod
, SRC_TMG_SEL0
, mask
, val
);
402 rsnd_mod_bset(mod
, SRC_TMG_SEL1
, mask
, val
);
405 rsnd_mod_bset(mod
, SRC_TMG_SEL2
, mask
, val
);
412 static int rsnd_src_set_convert_rate_gen1(struct rsnd_mod
*mod
,
413 struct rsnd_dai
*rdai
,
414 struct rsnd_dai_stream
*io
)
418 ret
= rsnd_src_set_convert_rate(mod
, rdai
, io
);
422 /* Select SRC mode (fixed value) */
423 rsnd_mod_write(mod
, SRC_SRCCR
, 0x00010110);
425 /* Set the restriction value of the FS ratio (98%) */
426 rsnd_mod_write(mod
, SRC_MNFSR
,
427 rsnd_mod_read(mod
, SRC_IFSVR
) / 100 * 98);
429 /* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
434 static int rsnd_src_init_gen1(struct rsnd_mod
*mod
,
435 struct rsnd_dai
*rdai
,
436 struct rsnd_dai_stream
*io
)
440 ret
= rsnd_src_init(mod
, rdai
, io
);
444 ret
= rsnd_src_set_route_gen1(mod
, rdai
, io
);
448 ret
= rsnd_src_set_convert_rate_gen1(mod
, rdai
, io
);
452 ret
= rsnd_src_set_convert_timing_gen1(mod
, rdai
, io
);
459 static int rsnd_src_start_gen1(struct rsnd_mod
*mod
,
460 struct rsnd_dai
*rdai
,
461 struct rsnd_dai_stream
*io
)
463 int id
= rsnd_mod_id(mod
);
465 rsnd_mod_bset(mod
, SRC_ROUTE_CTRL
, (1 << id
), (1 << id
));
467 return rsnd_src_start(mod
, rdai
, io
);
470 static int rsnd_src_stop_gen1(struct rsnd_mod
*mod
,
471 struct rsnd_dai
*rdai
,
472 struct rsnd_dai_stream
*io
)
474 int id
= rsnd_mod_id(mod
);
476 rsnd_mod_bset(mod
, SRC_ROUTE_CTRL
, (1 << id
), 0);
478 return rsnd_src_stop(mod
, rdai
, io
);
481 static struct rsnd_mod_ops rsnd_src_gen1_ops
= {
482 .name
= "sru (gen1)",
483 .init
= rsnd_src_init_gen1
,
484 .quit
= rsnd_src_quit
,
485 .start
= rsnd_src_start_gen1
,
486 .stop
= rsnd_src_stop_gen1
,
492 static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod
*mod
,
493 struct rsnd_dai
*rdai
,
494 struct rsnd_dai_stream
*io
)
498 ret
= rsnd_src_set_convert_rate(mod
, rdai
, io
);
502 rsnd_mod_write(mod
, SSI_BUSIF_ADINR
, rsnd_mod_read(mod
, SRC_ADINR
));
503 rsnd_mod_write(mod
, SSI_BUSIF_MODE
, rsnd_mod_read(mod
, SRC_BUSIF_MODE
));
505 rsnd_mod_write(mod
, SRC_SRCCR
, 0x00011110);
507 rsnd_mod_write(mod
, SRC_BSDSR
, 0x01800000);
508 rsnd_mod_write(mod
, SRC_BSISR
, 0x00100060);
513 static int rsnd_src_set_convert_timing_gen2(struct rsnd_mod
*mod
,
514 struct rsnd_dai
*rdai
,
515 struct rsnd_dai_stream
*io
)
517 struct snd_pcm_runtime
*runtime
= rsnd_io_to_runtime(io
);
518 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
519 u32 convert_rate
= rsnd_src_convert_rate(src
);
523 ret
= rsnd_adg_set_convert_clk_gen2(mod
, rdai
, io
,
527 ret
= rsnd_adg_set_convert_timing_gen2(mod
, rdai
, io
);
532 static int rsnd_src_probe_gen2(struct rsnd_mod
*mod
,
533 struct rsnd_dai
*rdai
,
534 struct rsnd_dai_stream
*io
)
536 struct rsnd_priv
*priv
= rsnd_mod_to_priv(mod
);
537 struct rcar_snd_info
*info
= rsnd_priv_to_info(priv
);
538 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
539 struct rsnd_mod
*ssi
= rsnd_ssi_mod_get(priv
, rsnd_mod_id(mod
));
540 struct device
*dev
= rsnd_priv_to_dev(priv
);
545 is_play
= rsnd_info_is_playback(priv
, src
);
547 is_play
= rsnd_ssi_is_play(ssi
);
549 ret
= rsnd_dma_init(priv
,
550 rsnd_mod_to_dma(mod
),
554 dev_err(dev
, "SRC DMA failed\n");
559 static int rsnd_src_remove_gen2(struct rsnd_mod
*mod
,
560 struct rsnd_dai
*rdai
,
561 struct rsnd_dai_stream
*io
)
563 rsnd_dma_quit(rsnd_mod_to_priv(mod
), rsnd_mod_to_dma(mod
));
568 static int rsnd_src_init_gen2(struct rsnd_mod
*mod
,
569 struct rsnd_dai
*rdai
,
570 struct rsnd_dai_stream
*io
)
574 ret
= rsnd_src_init(mod
, rdai
, io
);
578 ret
= rsnd_src_set_convert_rate_gen2(mod
, rdai
, io
);
582 ret
= rsnd_src_set_convert_timing_gen2(mod
, rdai
, io
);
589 static int rsnd_src_start_gen2(struct rsnd_mod
*mod
,
590 struct rsnd_dai
*rdai
,
591 struct rsnd_dai_stream
*io
)
593 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
595 rsnd_dma_start(rsnd_mod_to_dma(&src
->mod
));
597 rsnd_mod_write(mod
, SSI_CTRL
, 0x1);
598 rsnd_mod_write(mod
, SRC_CTRL
, 0x11);
600 return rsnd_src_start(mod
, rdai
, io
);
603 static int rsnd_src_stop_gen2(struct rsnd_mod
*mod
,
604 struct rsnd_dai
*rdai
,
605 struct rsnd_dai_stream
*io
)
607 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
609 rsnd_mod_write(mod
, SSI_CTRL
, 0);
610 rsnd_mod_write(mod
, SRC_CTRL
, 0);
612 rsnd_dma_stop(rsnd_mod_to_dma(&src
->mod
));
614 return rsnd_src_stop(mod
, rdai
, io
);
617 static struct rsnd_mod_ops rsnd_src_gen2_ops
= {
618 .name
= "src (gen2)",
619 .probe
= rsnd_src_probe_gen2
,
620 .remove
= rsnd_src_remove_gen2
,
621 .init
= rsnd_src_init_gen2
,
622 .quit
= rsnd_src_quit
,
623 .start
= rsnd_src_start_gen2
,
624 .stop
= rsnd_src_stop_gen2
,
627 struct rsnd_mod
*rsnd_src_mod_get(struct rsnd_priv
*priv
, int id
)
629 if (WARN_ON(id
< 0 || id
>= rsnd_src_nr(priv
)))
632 return &((struct rsnd_src
*)(priv
->src
) + id
)->mod
;
635 static void rsnd_of_parse_src(struct platform_device
*pdev
,
636 const struct rsnd_of_data
*of_data
,
637 struct rsnd_priv
*priv
)
639 struct device_node
*src_node
;
640 struct rcar_snd_info
*info
= rsnd_priv_to_info(priv
);
641 struct rsnd_src_platform_info
*src_info
;
642 struct device
*dev
= &pdev
->dev
;
648 src_node
= of_get_child_by_name(dev
->of_node
, "rcar_sound,src");
652 nr
= of_get_child_count(src_node
);
656 src_info
= devm_kzalloc(dev
,
657 sizeof(struct rsnd_src_platform_info
) * nr
,
660 dev_err(dev
, "src info allocation error\n");
664 info
->src_info
= src_info
;
665 info
->src_info_nr
= nr
;
668 int rsnd_src_probe(struct platform_device
*pdev
,
669 const struct rsnd_of_data
*of_data
,
670 struct rsnd_priv
*priv
)
672 struct rcar_snd_info
*info
= rsnd_priv_to_info(priv
);
673 struct device
*dev
= rsnd_priv_to_dev(priv
);
674 struct rsnd_src
*src
;
675 struct rsnd_mod_ops
*ops
;
677 char name
[RSND_SRC_NAME_SIZE
];
680 rsnd_of_parse_src(pdev
, of_data
, priv
);
685 nr
= info
->src_info_nr
;
689 src
= devm_kzalloc(dev
, sizeof(*src
) * nr
, GFP_KERNEL
);
691 dev_err(dev
, "SRC allocate failed\n");
698 for_each_rsnd_src(src
, priv
, i
) {
699 snprintf(name
, RSND_SRC_NAME_SIZE
, "src.%d", i
);
701 clk
= devm_clk_get(dev
, name
);
703 snprintf(name
, RSND_SRC_NAME_SIZE
, "scu.%d", i
);
704 clk
= devm_clk_get(dev
, name
);
710 src
->info
= &info
->src_info
[i
];
713 ops
= &rsnd_src_non_ops
;
714 if (rsnd_src_hpbif_is_enable(src
)) {
715 if (rsnd_is_gen1(priv
))
716 ops
= &rsnd_src_gen1_ops
;
717 if (rsnd_is_gen2(priv
))
718 ops
= &rsnd_src_gen2_ops
;
721 rsnd_mod_init(priv
, &src
->mod
, ops
, RSND_MOD_SRC
, i
);
723 dev_dbg(dev
, "SRC%d probed\n", i
);