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_convert_rate(p) ((p)->info->convert_rate)
31 #define rsnd_mod_to_src(_mod) \
32 container_of((_mod), struct rsnd_src, mod)
33 #define rsnd_src_dma_available(src) \
34 rsnd_dma_available(rsnd_mod_to_dma(&(src)->mod))
36 #define for_each_rsnd_src(pos, priv, i) \
38 ((i) < rsnd_src_nr(priv)) && \
39 ((pos) = (struct rsnd_src *)(priv)->src + i); \
44 * image of SRC (Sampling Rate Converter)
46 * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
47 * 48kHz <-> | SRC | <------> | SSI | <-----> | codec |
48 * 44.1kHz <-> +-----+ +-----+ +-------+
58 * [mem] -> [SRU] -> [SSI]
63 * [mem] -> [SRC] -> [SSIU] -> [SSI]
68 * How to use SRC bypass mode for debugging
70 * SRC has bypass mode, and it is useful for debugging.
72 * SRCm_MODE controls whether SRC is used or not
73 * SSI_MODE0 controls whether SSIU which receives SRC data
75 * Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC,
76 * but SRC bypass mode needs SSI_MODE0 only.
79 * struct rsnd_src_platform_info {
84 * rsnd_src_convert_rate() indicates
85 * above convert_rate, and it controls
86 * whether SRC is used or not.
89 * static struct rsnd_dai_platform_info rsnd_dai = {
90 * .playback = { .ssi = &rsnd_ssi[0], },
94 * static struct rsnd_src_platform_info rsnd_src[] = {
98 * static struct rsnd_dai_platform_info rsnd_dai = {
99 * .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] },
102 * ex) uses SRC bypass mode
103 * static struct rsnd_src_platform_info rsnd_src[] = {
107 * static struct rsnd_dai_platform_info rsnd_dai = {
108 * .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] },
114 * Gen1/Gen2 common functions
116 int rsnd_src_ssi_mode_init(struct rsnd_mod
*ssi_mod
,
117 struct rsnd_dai
*rdai
,
118 struct rsnd_dai_stream
*io
)
120 struct rsnd_mod
*src_mod
= rsnd_io_to_mod_src(io
);
121 int ssi_id
= rsnd_mod_id(ssi_mod
);
126 rsnd_mod_bset(ssi_mod
, SSI_MODE0
, (1 << ssi_id
),
127 src_mod
? 0 : (1 << ssi_id
));
132 if (rsnd_ssi_is_pin_sharing(ssi_mod
)) {
147 rsnd_mod_bset(ssi_mod
, SSI_MODE1
,
149 rsnd_dai_is_clk_master(rdai
) ?
150 0x2 << shift
: 0x1 << shift
);
156 int rsnd_src_enable_ssi_irq(struct rsnd_mod
*ssi_mod
,
157 struct rsnd_dai
*rdai
,
158 struct rsnd_dai_stream
*io
)
160 struct rsnd_priv
*priv
= rsnd_mod_to_priv(ssi_mod
);
162 /* enable PIO interrupt if Gen2 */
163 if (rsnd_is_gen2(priv
))
164 rsnd_mod_write(ssi_mod
, INT_ENABLE
, 0x0f000000);
169 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv
*priv
,
170 struct rsnd_dai_stream
*io
,
171 struct snd_pcm_runtime
*runtime
)
173 struct rsnd_mod
*src_mod
= rsnd_io_to_mod_src(io
);
174 struct rsnd_src
*src
;
175 unsigned int rate
= 0;
178 src
= rsnd_mod_to_src(src_mod
);
181 * return convert rate if SRC is used,
182 * otherwise, return runtime->rate as usual
184 rate
= rsnd_src_convert_rate(src
);
188 rate
= runtime
->rate
;
193 static int rsnd_src_set_convert_rate(struct rsnd_mod
*mod
,
194 struct rsnd_dai
*rdai
,
195 struct rsnd_dai_stream
*io
)
197 struct snd_pcm_runtime
*runtime
= rsnd_io_to_runtime(io
);
198 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
199 u32 convert_rate
= rsnd_src_convert_rate(src
);
200 u32 adinr
= runtime
->channels
;
204 fsrate
= 0x0400000 / convert_rate
* runtime
->rate
;
206 /* set/clear soft reset */
207 rsnd_mod_write(mod
, SRC_SWRSR
, 0);
208 rsnd_mod_write(mod
, SRC_SWRSR
, 1);
211 * Initialize the operation of the SRC internal circuits
212 * see rsnd_src_start()
214 rsnd_mod_write(mod
, SRC_SRCIR
, 1);
216 /* Set channel number and output bit length */
217 switch (runtime
->sample_bits
) {
227 rsnd_mod_write(mod
, SRC_ADINR
, adinr
);
229 /* Enable the initial value of IFS */
231 rsnd_mod_write(mod
, SRC_IFSCR
, 1);
233 /* Set initial value of IFS */
234 rsnd_mod_write(mod
, SRC_IFSVR
, fsrate
);
237 /* use DMA transfer */
238 rsnd_mod_write(mod
, SRC_BUSIF_MODE
, 1);
243 static int rsnd_src_init(struct rsnd_mod
*mod
,
244 struct rsnd_dai
*rdai
,
245 struct rsnd_dai_stream
*io
)
247 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
249 clk_enable(src
->clk
);
254 static int rsnd_src_quit(struct rsnd_mod
*mod
,
255 struct rsnd_dai
*rdai
,
256 struct rsnd_dai_stream
*io
)
258 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
260 clk_disable(src
->clk
);
265 static int rsnd_src_start(struct rsnd_mod
*mod
,
266 struct rsnd_dai
*rdai
,
267 struct rsnd_dai_stream
*io
)
269 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
272 * Cancel the initialization and operate the SRC function
273 * see rsnd_src_set_convert_rate()
275 rsnd_mod_write(mod
, SRC_SRCIR
, 0);
277 if (rsnd_src_convert_rate(src
))
278 rsnd_mod_write(mod
, SRC_ROUTE_MODE0
, 1);
284 static int rsnd_src_stop(struct rsnd_mod
*mod
,
285 struct rsnd_dai
*rdai
,
286 struct rsnd_dai_stream
*io
)
288 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
290 if (rsnd_src_convert_rate(src
))
291 rsnd_mod_write(mod
, SRC_ROUTE_MODE0
, 0);
296 static struct rsnd_mod_ops rsnd_src_non_ops
= {
303 static int rsnd_src_set_route_gen1(struct rsnd_mod
*mod
,
304 struct rsnd_dai
*rdai
,
305 struct rsnd_dai_stream
*io
)
307 struct src_route_config
{
314 { 0x7, 12, }, /* 3 */
315 { 0x7, 16, }, /* 4 */
316 { 0x7, 20, }, /* 5 */
317 { 0x7, 24, }, /* 6 */
318 { 0x3, 28, }, /* 7 */
319 { 0x3, 30, }, /* 8 */
325 id
= rsnd_mod_id(mod
);
326 if (id
< 0 || id
>= ARRAY_SIZE(routes
))
332 val
= rsnd_dai_is_play(rdai
, io
) ? 0x1 : 0x2;
333 val
= val
<< routes
[id
].shift
;
334 mask
= routes
[id
].mask
<< routes
[id
].shift
;
336 rsnd_mod_bset(mod
, SRC_ROUTE_SEL
, mask
, val
);
341 static int rsnd_src_set_convert_timing_gen1(struct rsnd_mod
*mod
,
342 struct rsnd_dai
*rdai
,
343 struct rsnd_dai_stream
*io
)
345 struct rsnd_priv
*priv
= rsnd_mod_to_priv(mod
);
346 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
347 struct snd_pcm_runtime
*runtime
= rsnd_io_to_runtime(io
);
348 u32 convert_rate
= rsnd_src_convert_rate(src
);
352 int id
= rsnd_mod_id(mod
);
358 shift
= (id
% 4) * 8;
359 mask
= 0x1F << shift
;
362 * ADG is used as source clock if SRC was used,
363 * then, SSI WS is used as destination clock.
364 * SSI WS is used as source clock if SRC is not used
365 * (when playback, source/destination become reverse when capture)
371 ret
= rsnd_adg_set_convert_clk_gen1(priv
, mod
,
374 } else if (8 == id
) {
375 /* use SSI WS, but SRU8 is special */
379 val
= (id
+ 1) << shift
;
387 rsnd_mod_bset(mod
, SRC_TMG_SEL0
, mask
, val
);
390 rsnd_mod_bset(mod
, SRC_TMG_SEL1
, mask
, val
);
393 rsnd_mod_bset(mod
, SRC_TMG_SEL2
, mask
, val
);
400 static int rsnd_src_set_convert_rate_gen1(struct rsnd_mod
*mod
,
401 struct rsnd_dai
*rdai
,
402 struct rsnd_dai_stream
*io
)
406 ret
= rsnd_src_set_convert_rate(mod
, rdai
, io
);
410 /* Select SRC mode (fixed value) */
411 rsnd_mod_write(mod
, SRC_SRCCR
, 0x00010110);
413 /* Set the restriction value of the FS ratio (98%) */
414 rsnd_mod_write(mod
, SRC_MNFSR
,
415 rsnd_mod_read(mod
, SRC_IFSVR
) / 100 * 98);
417 /* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
422 static int rsnd_src_init_gen1(struct rsnd_mod
*mod
,
423 struct rsnd_dai
*rdai
,
424 struct rsnd_dai_stream
*io
)
428 ret
= rsnd_src_init(mod
, rdai
, io
);
432 ret
= rsnd_src_set_route_gen1(mod
, rdai
, io
);
436 ret
= rsnd_src_set_convert_rate_gen1(mod
, rdai
, io
);
440 ret
= rsnd_src_set_convert_timing_gen1(mod
, rdai
, io
);
447 static int rsnd_src_start_gen1(struct rsnd_mod
*mod
,
448 struct rsnd_dai
*rdai
,
449 struct rsnd_dai_stream
*io
)
451 int id
= rsnd_mod_id(mod
);
453 rsnd_mod_bset(mod
, SRC_ROUTE_CTRL
, (1 << id
), (1 << id
));
455 return rsnd_src_start(mod
, rdai
, io
);
458 static int rsnd_src_stop_gen1(struct rsnd_mod
*mod
,
459 struct rsnd_dai
*rdai
,
460 struct rsnd_dai_stream
*io
)
462 int id
= rsnd_mod_id(mod
);
464 rsnd_mod_bset(mod
, SRC_ROUTE_CTRL
, (1 << id
), 0);
466 return rsnd_src_stop(mod
, rdai
, io
);
469 static struct rsnd_mod_ops rsnd_src_gen1_ops
= {
470 .name
= "sru (gen1)",
471 .init
= rsnd_src_init_gen1
,
472 .quit
= rsnd_src_quit
,
473 .start
= rsnd_src_start_gen1
,
474 .stop
= rsnd_src_stop_gen1
,
480 static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod
*mod
,
481 struct rsnd_dai
*rdai
,
482 struct rsnd_dai_stream
*io
)
486 ret
= rsnd_src_set_convert_rate(mod
, rdai
, io
);
490 rsnd_mod_write(mod
, SSI_BUSIF_ADINR
, rsnd_mod_read(mod
, SRC_ADINR
));
491 rsnd_mod_write(mod
, SSI_BUSIF_MODE
, rsnd_mod_read(mod
, SRC_BUSIF_MODE
));
493 rsnd_mod_write(mod
, SRC_SRCCR
, 0x00011110);
495 rsnd_mod_write(mod
, SRC_BSDSR
, 0x01800000);
496 rsnd_mod_write(mod
, SRC_BSISR
, 0x00100060);
501 static int rsnd_src_set_convert_timing_gen2(struct rsnd_mod
*mod
,
502 struct rsnd_dai
*rdai
,
503 struct rsnd_dai_stream
*io
)
505 struct snd_pcm_runtime
*runtime
= rsnd_io_to_runtime(io
);
506 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
507 u32 convert_rate
= rsnd_src_convert_rate(src
);
511 ret
= rsnd_adg_set_convert_clk_gen2(mod
, rdai
, io
,
515 ret
= rsnd_adg_set_convert_timing_gen2(mod
, rdai
, io
);
520 static int rsnd_src_probe_gen2(struct rsnd_mod
*mod
,
521 struct rsnd_dai
*rdai
,
522 struct rsnd_dai_stream
*io
)
524 struct rsnd_priv
*priv
= rsnd_mod_to_priv(mod
);
525 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
526 struct device
*dev
= rsnd_priv_to_dev(priv
);
529 ret
= rsnd_dma_init(priv
,
530 rsnd_mod_to_dma(mod
),
531 rsnd_info_is_playback(priv
, src
),
534 dev_err(dev
, "SRC DMA failed\n");
539 static int rsnd_src_remove_gen2(struct rsnd_mod
*mod
,
540 struct rsnd_dai
*rdai
,
541 struct rsnd_dai_stream
*io
)
543 rsnd_dma_quit(rsnd_mod_to_priv(mod
), rsnd_mod_to_dma(mod
));
548 static int rsnd_src_init_gen2(struct rsnd_mod
*mod
,
549 struct rsnd_dai
*rdai
,
550 struct rsnd_dai_stream
*io
)
554 ret
= rsnd_src_init(mod
, rdai
, io
);
558 ret
= rsnd_src_set_convert_rate_gen2(mod
, rdai
, io
);
562 ret
= rsnd_src_set_convert_timing_gen2(mod
, rdai
, io
);
569 static int rsnd_src_start_gen2(struct rsnd_mod
*mod
,
570 struct rsnd_dai
*rdai
,
571 struct rsnd_dai_stream
*io
)
573 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
575 rsnd_dma_start(rsnd_mod_to_dma(&src
->mod
));
577 rsnd_mod_write(mod
, SSI_CTRL
, 0x1);
578 rsnd_mod_write(mod
, SRC_CTRL
, 0x11);
580 return rsnd_src_start(mod
, rdai
, io
);
583 static int rsnd_src_stop_gen2(struct rsnd_mod
*mod
,
584 struct rsnd_dai
*rdai
,
585 struct rsnd_dai_stream
*io
)
587 struct rsnd_src
*src
= rsnd_mod_to_src(mod
);
589 rsnd_mod_write(mod
, SSI_CTRL
, 0);
590 rsnd_mod_write(mod
, SRC_CTRL
, 0);
592 rsnd_dma_stop(rsnd_mod_to_dma(&src
->mod
));
594 return rsnd_src_stop(mod
, rdai
, io
);
597 static struct rsnd_mod_ops rsnd_src_gen2_ops
= {
598 .name
= "src (gen2)",
599 .probe
= rsnd_src_probe_gen2
,
600 .remove
= rsnd_src_remove_gen2
,
601 .init
= rsnd_src_init_gen2
,
602 .quit
= rsnd_src_quit
,
603 .start
= rsnd_src_start_gen2
,
604 .stop
= rsnd_src_stop_gen2
,
607 struct rsnd_mod
*rsnd_src_mod_get(struct rsnd_priv
*priv
, int id
)
609 if (WARN_ON(id
< 0 || id
>= rsnd_src_nr(priv
)))
612 return &((struct rsnd_src
*)(priv
->src
) + id
)->mod
;
615 static void rsnd_of_parse_src(struct platform_device
*pdev
,
616 const struct rsnd_of_data
*of_data
,
617 struct rsnd_priv
*priv
)
619 struct device_node
*src_node
;
620 struct rcar_snd_info
*info
= rsnd_priv_to_info(priv
);
621 struct rsnd_src_platform_info
*src_info
;
622 struct device
*dev
= &pdev
->dev
;
628 src_node
= of_get_child_by_name(dev
->of_node
, "rcar_sound,src");
632 nr
= of_get_child_count(src_node
);
636 src_info
= devm_kzalloc(dev
,
637 sizeof(struct rsnd_src_platform_info
) * nr
,
640 dev_err(dev
, "src info allocation error\n");
644 info
->src_info
= src_info
;
645 info
->src_info_nr
= nr
;
648 int rsnd_src_probe(struct platform_device
*pdev
,
649 const struct rsnd_of_data
*of_data
,
650 struct rsnd_priv
*priv
)
652 struct rcar_snd_info
*info
= rsnd_priv_to_info(priv
);
653 struct device
*dev
= rsnd_priv_to_dev(priv
);
654 struct rsnd_src
*src
;
655 struct rsnd_mod_ops
*ops
;
657 char name
[RSND_SRC_NAME_SIZE
];
660 rsnd_of_parse_src(pdev
, of_data
, priv
);
665 nr
= info
->src_info_nr
;
669 src
= devm_kzalloc(dev
, sizeof(*src
) * nr
, GFP_KERNEL
);
671 dev_err(dev
, "SRC allocate failed\n");
678 for_each_rsnd_src(src
, priv
, i
) {
679 snprintf(name
, RSND_SRC_NAME_SIZE
, "src.%d", i
);
681 clk
= devm_clk_get(dev
, name
);
685 src
->info
= &info
->src_info
[i
];
688 ops
= &rsnd_src_non_ops
;
689 if (rsnd_is_gen1(priv
))
690 ops
= &rsnd_src_gen1_ops
;
691 if (rsnd_is_gen2(priv
))
692 ops
= &rsnd_src_gen2_ops
;
694 rsnd_mod_init(priv
, &src
->mod
, ops
, RSND_MOD_SRC
, i
);
696 dev_dbg(dev
, "SRC%d probed\n", i
);