2 * Renesas R-Car SCU 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_scu_platform_info
*info
; /* rcar_snd.h */
19 #define RSND_SCU_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_scu_mode_flags(p) ((p)->info->flags)
31 #define rsnd_scu_convert_rate(p) ((p)->info->convert_rate)
32 #define rsnd_mod_to_scu(_mod) \
33 container_of((_mod), struct rsnd_scu, mod)
34 #define rsnd_scu_hpbif_is_enable(scu) \
35 (rsnd_scu_mode_flags(scu) & RSND_SCU_USE_HPBIF)
36 #define rsnd_scu_dma_available(scu) \
37 rsnd_dma_available(rsnd_mod_to_dma(&(scu)->mod))
39 #define for_each_rsnd_scu(pos, priv, i) \
41 ((i) < rsnd_scu_nr(priv)) && \
42 ((pos) = (struct rsnd_scu *)(priv)->scu + 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] -> [SCU] -> [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_scu_platform_info {
87 * rsnd_scu_hpbif_is_enable() will be true
88 * if flags had RSND_SCU_USE_HPBIF,
89 * and it controls whether SSIU is used or not.
91 * rsnd_scu_convert_rate() indicates
92 * above convert_rate, and it controls
93 * whether SRC is used or not.
96 * struct rsnd_scu_platform_info info = {
102 * struct rsnd_scu_platform_info info = {
103 * .flags = RSND_SCU_USE_HPBIF,
104 * .convert_rate = 48000,
107 * ex) uses SRC bypass mode
108 * struct rsnd_scu_platform_info info = {
109 * .flags = RSND_SCU_USE_HPBIF,
116 * Gen1/Gen2 common functions
118 static int rsnd_scu_ssi_mode_init(struct rsnd_mod
*mod
,
119 struct rsnd_dai
*rdai
,
120 struct rsnd_dai_stream
*io
)
122 struct rsnd_priv
*priv
= rsnd_mod_to_priv(mod
);
123 struct rsnd_scu
*scu
= rsnd_mod_to_scu(mod
);
124 struct rsnd_mod
*ssi_mod
= rsnd_io_to_mod_ssi(io
);
125 int ssi_id
= rsnd_mod_id(ssi_mod
);
126 u32 convert_rate
= rsnd_scu_convert_rate(scu
);
128 if (convert_rate
&& !rsnd_dai_is_clk_master(rdai
)) {
129 struct device
*dev
= rsnd_priv_to_dev(priv
);
131 dev_err(dev
, "rsnd should be clk master when you rate convert\n");
138 rsnd_mod_bset(mod
, SSI_MODE0
, (1 << ssi_id
),
139 rsnd_scu_hpbif_is_enable(scu
) ? 0 : (1 << ssi_id
));
144 if (rsnd_ssi_is_pin_sharing(ssi_mod
)) {
159 rsnd_mod_bset(mod
, SSI_MODE1
,
161 rsnd_dai_is_clk_master(rdai
) ?
162 0x2 << shift
: 0x1 << shift
);
168 unsigned int rsnd_scu_get_ssi_rate(struct rsnd_priv
*priv
,
169 struct rsnd_dai_stream
*io
,
170 struct snd_pcm_runtime
*runtime
)
172 struct rsnd_scu
*scu
;
175 scu
= rsnd_mod_to_scu(rsnd_io_to_mod_scu(io
));
178 * return convert rate if SRC is used,
179 * otherwise, return runtime->rate as usual
181 rate
= rsnd_scu_convert_rate(scu
);
183 rate
= runtime
->rate
;
188 static int rsnd_scu_set_convert_rate(struct rsnd_mod
*mod
,
189 struct rsnd_dai
*rdai
,
190 struct rsnd_dai_stream
*io
)
192 struct snd_pcm_runtime
*runtime
= rsnd_io_to_runtime(io
);
193 struct rsnd_scu
*scu
= rsnd_mod_to_scu(mod
);
194 u32 convert_rate
= rsnd_scu_convert_rate(scu
);
195 u32 adinr
= runtime
->channels
;
199 fsrate
= 0x0400000 / convert_rate
* runtime
->rate
;
201 /* set/clear soft reset */
202 rsnd_mod_write(mod
, SRC_SWRSR
, 0);
203 rsnd_mod_write(mod
, SRC_SWRSR
, 1);
206 * Initialize the operation of the SRC internal circuits
207 * see rsnd_scu_start()
209 rsnd_mod_write(mod
, SRC_SRCIR
, 1);
211 /* Set channel number and output bit length */
212 switch (runtime
->sample_bits
) {
222 rsnd_mod_write(mod
, SRC_ADINR
, adinr
);
224 /* Enable the initial value of IFS */
226 rsnd_mod_write(mod
, SRC_IFSCR
, 1);
228 /* Set initial value of IFS */
229 rsnd_mod_write(mod
, SRC_IFSVR
, fsrate
);
232 /* use DMA transfer */
233 rsnd_mod_write(mod
, SRC_BUSIF_MODE
, 1);
238 static int rsnd_scu_init(struct rsnd_mod
*mod
,
239 struct rsnd_dai
*rdai
,
240 struct rsnd_dai_stream
*io
)
242 struct rsnd_scu
*scu
= rsnd_mod_to_scu(mod
);
245 clk_enable(scu
->clk
);
247 ret
= rsnd_scu_ssi_mode_init(mod
, rdai
, io
);
254 static int rsnd_scu_quit(struct rsnd_mod
*mod
,
255 struct rsnd_dai
*rdai
,
256 struct rsnd_dai_stream
*io
)
258 struct rsnd_scu
*scu
= rsnd_mod_to_scu(mod
);
260 clk_disable(scu
->clk
);
265 static int rsnd_scu_start(struct rsnd_mod
*mod
,
266 struct rsnd_dai
*rdai
,
267 struct rsnd_dai_stream
*io
)
269 struct rsnd_scu
*scu
= rsnd_mod_to_scu(mod
);
272 * Cancel the initialization and operate the SRC function
273 * see rsnd_scu_set_convert_rate()
275 rsnd_mod_write(mod
, SRC_SRCIR
, 0);
277 if (rsnd_scu_convert_rate(scu
))
278 rsnd_mod_write(mod
, SRC_ROUTE_MODE0
, 1);
284 static int rsnd_scu_stop(struct rsnd_mod
*mod
,
285 struct rsnd_dai
*rdai
,
286 struct rsnd_dai_stream
*io
)
288 struct rsnd_scu
*scu
= rsnd_mod_to_scu(mod
);
290 if (rsnd_scu_convert_rate(scu
))
291 rsnd_mod_write(mod
, SRC_ROUTE_MODE0
, 0);
296 static struct rsnd_mod_ops rsnd_scu_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 scu_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_scu_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_scu
*scu
= rsnd_mod_to_scu(mod
);
347 struct snd_pcm_runtime
*runtime
= rsnd_io_to_runtime(io
);
348 u32 convert_rate
= rsnd_scu_convert_rate(scu
);
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_scu_set_convert_rate_gen1(struct rsnd_mod
*mod
,
401 struct rsnd_dai
*rdai
,
402 struct rsnd_dai_stream
*io
)
406 ret
= rsnd_scu_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_scu_init_gen1(struct rsnd_mod
*mod
,
423 struct rsnd_dai
*rdai
,
424 struct rsnd_dai_stream
*io
)
428 ret
= rsnd_scu_init(mod
, rdai
, io
);
432 ret
= rsnd_src_set_route_gen1(mod
, rdai
, io
);
436 ret
= rsnd_scu_set_convert_rate_gen1(mod
, rdai
, io
);
440 ret
= rsnd_scu_set_convert_timing_gen1(mod
, rdai
, io
);
447 static int rsnd_scu_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_scu_start(mod
, rdai
, io
);
458 static int rsnd_scu_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_scu_stop(mod
, rdai
, io
);
469 static struct rsnd_mod_ops rsnd_scu_gen1_ops
= {
470 .name
= "sru (gen1)",
471 .init
= rsnd_scu_init_gen1
,
472 .quit
= rsnd_scu_quit
,
473 .start
= rsnd_scu_start_gen1
,
474 .stop
= rsnd_scu_stop_gen1
,
477 static struct rsnd_mod_ops rsnd_scu_non_gen1_ops
= {
478 .name
= "non-sru (gen1)",
479 .init
= rsnd_scu_ssi_mode_init
,
485 static int rsnd_scu_set_convert_rate_gen2(struct rsnd_mod
*mod
,
486 struct rsnd_dai
*rdai
,
487 struct rsnd_dai_stream
*io
)
491 ret
= rsnd_scu_set_convert_rate(mod
, rdai
, io
);
495 rsnd_mod_write(mod
, SSI_BUSIF_ADINR
, rsnd_mod_read(mod
, SRC_ADINR
));
496 rsnd_mod_write(mod
, SSI_BUSIF_MODE
, rsnd_mod_read(mod
, SRC_BUSIF_MODE
));
498 rsnd_mod_write(mod
, SRC_SRCCR
, 0x00011110);
500 rsnd_mod_write(mod
, SRC_BSDSR
, 0x01800000);
501 rsnd_mod_write(mod
, SRC_BSISR
, 0x00100060);
506 static int rsnd_scu_set_convert_timing_gen2(struct rsnd_mod
*mod
,
507 struct rsnd_dai
*rdai
,
508 struct rsnd_dai_stream
*io
)
510 struct snd_pcm_runtime
*runtime
= rsnd_io_to_runtime(io
);
511 struct rsnd_scu
*scu
= rsnd_mod_to_scu(mod
);
512 u32 convert_rate
= rsnd_scu_convert_rate(scu
);
516 ret
= rsnd_adg_set_convert_clk_gen2(mod
, rdai
, io
,
520 ret
= rsnd_adg_set_convert_timing_gen2(mod
, rdai
, io
);
525 static int rsnd_scu_init_gen2(struct rsnd_mod
*mod
,
526 struct rsnd_dai
*rdai
,
527 struct rsnd_dai_stream
*io
)
531 ret
= rsnd_scu_init(mod
, rdai
, io
);
535 ret
= rsnd_scu_set_convert_rate_gen2(mod
, rdai
, io
);
539 ret
= rsnd_scu_set_convert_timing_gen2(mod
, rdai
, io
);
546 static int rsnd_scu_start_gen2(struct rsnd_mod
*mod
,
547 struct rsnd_dai
*rdai
,
548 struct rsnd_dai_stream
*io
)
550 struct rsnd_scu
*scu
= rsnd_mod_to_scu(mod
);
552 rsnd_dma_start(rsnd_mod_to_dma(&scu
->mod
));
554 rsnd_mod_write(mod
, SSI_CTRL
, 0x1);
555 rsnd_mod_write(mod
, SRC_CTRL
, 0x11);
557 return rsnd_scu_start(mod
, rdai
, io
);
560 static int rsnd_scu_stop_gen2(struct rsnd_mod
*mod
,
561 struct rsnd_dai
*rdai
,
562 struct rsnd_dai_stream
*io
)
564 struct rsnd_scu
*scu
= rsnd_mod_to_scu(mod
);
566 rsnd_mod_write(mod
, SSI_CTRL
, 0);
567 rsnd_mod_write(mod
, SRC_CTRL
, 0);
569 rsnd_dma_stop(rsnd_mod_to_dma(&scu
->mod
));
571 return rsnd_scu_stop(mod
, rdai
, io
);
574 static struct rsnd_mod_ops rsnd_scu_gen2_ops
= {
575 .name
= "scu (gen2)",
576 .init
= rsnd_scu_init_gen2
,
577 .quit
= rsnd_scu_quit
,
578 .start
= rsnd_scu_start_gen2
,
579 .stop
= rsnd_scu_stop_gen2
,
582 static int rsnd_scu_start_non_gen2(struct rsnd_mod
*mod
,
583 struct rsnd_dai
*rdai
,
584 struct rsnd_dai_stream
*io
)
586 struct rsnd_mod
*ssi_mod
= rsnd_io_to_mod_ssi(io
);
588 /* enable PIO interrupt */
589 rsnd_mod_write(ssi_mod
, INT_ENABLE
, 0x0f000000);
594 static struct rsnd_mod_ops rsnd_scu_non_gen2_ops
= {
595 .name
= "non-scu (gen2)",
596 .init
= rsnd_scu_ssi_mode_init
,
597 .start
= rsnd_scu_start_non_gen2
,
600 struct rsnd_mod
*rsnd_scu_mod_get(struct rsnd_priv
*priv
, int id
)
602 if (WARN_ON(id
< 0 || id
>= rsnd_scu_nr(priv
)))
605 return &((struct rsnd_scu
*)(priv
->scu
) + id
)->mod
;
608 int rsnd_scu_probe(struct platform_device
*pdev
,
609 struct rsnd_priv
*priv
)
611 struct rcar_snd_info
*info
= rsnd_priv_to_info(priv
);
612 struct device
*dev
= rsnd_priv_to_dev(priv
);
613 struct rsnd_scu
*scu
;
614 struct rsnd_mod_ops
*ops
;
616 char name
[RSND_SCU_NAME_SIZE
];
622 nr
= info
->scu_info_nr
;
626 scu
= devm_kzalloc(dev
, sizeof(*scu
) * nr
, GFP_KERNEL
);
628 dev_err(dev
, "SCU allocate failed\n");
635 for_each_rsnd_scu(scu
, priv
, i
) {
636 snprintf(name
, RSND_SCU_NAME_SIZE
, "scu.%d", i
);
638 clk
= devm_clk_get(dev
, name
);
642 scu
->info
= &info
->scu_info
[i
];
645 ops
= &rsnd_scu_non_ops
;
646 if (rsnd_scu_hpbif_is_enable(scu
)) {
647 if (rsnd_is_gen1(priv
))
648 ops
= &rsnd_scu_gen1_ops
;
649 if (rsnd_is_gen2(priv
)) {
653 if (info
->dai_info
) {
654 is_play
= rsnd_info_is_playback(priv
, scu
);
656 struct rsnd_mod
*ssi
= rsnd_ssi_mod_get(priv
, i
);
657 is_play
= rsnd_ssi_is_play(ssi
);
659 ret
= rsnd_dma_init(priv
,
660 rsnd_mod_to_dma(&scu
->mod
),
666 ops
= &rsnd_scu_gen2_ops
;
669 if (rsnd_is_gen1(priv
))
670 ops
= &rsnd_scu_non_gen1_ops
;
671 if (rsnd_is_gen2(priv
))
672 ops
= &rsnd_scu_non_gen2_ops
;
675 rsnd_mod_init(priv
, &scu
->mod
, ops
, RSND_MOD_SCU
, i
);
677 dev_dbg(dev
, "SCU%d probed\n", i
);
683 void rsnd_scu_remove(struct platform_device
*pdev
,
684 struct rsnd_priv
*priv
)
686 struct rsnd_scu
*scu
;
689 for_each_rsnd_scu(scu
, priv
, i
) {
690 if (rsnd_scu_dma_available(scu
))
691 rsnd_dma_quit(priv
, rsnd_mod_to_dma(&scu
->mod
));