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
21 #define rsnd_src_convert_rate(p) ((p)->info->convert_rate)
22 #define rsnd_mod_to_src(_mod) \
23 container_of((_mod), struct rsnd_src, mod)
24 #define rsnd_src_dma_available(src) \
25 rsnd_dma_available(rsnd_mod_to_dma(&(src)->mod))
27 #define for_each_rsnd_src(pos, priv, i) \
29 ((i) < rsnd_src_nr(priv)) && \
30 ((pos) = (struct rsnd_src *)(priv)->src + i); \
35 * image of SRC (Sampling Rate Converter)
37 * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
38 * 48kHz <-> | SRC | <------> | SSI | <-----> | codec |
39 * 44.1kHz <-> +-----+ +-----+ +-------+
49 * [mem] -> [SRU] -> [SSI]
54 * [mem] -> [SRC] -> [SSIU] -> [SSI]
59 * How to use SRC bypass mode for debugging
61 * SRC has bypass mode, and it is useful for debugging.
63 * SRCm_MODE controls whether SRC is used or not
64 * SSI_MODE0 controls whether SSIU which receives SRC data
66 * Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC,
67 * but SRC bypass mode needs SSI_MODE0 only.
70 * struct rsnd_src_platform_info {
75 * rsnd_src_convert_rate() indicates
76 * above convert_rate, and it controls
77 * whether SRC is used or not.
80 * static struct rsnd_dai_platform_info rsnd_dai = {
81 * .playback = { .ssi = &rsnd_ssi[0], },
85 * static struct rsnd_src_platform_info rsnd_src[] = {
89 * static struct rsnd_dai_platform_info rsnd_dai = {
90 * .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] },
93 * ex) uses SRC bypass mode
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] },
105 * Gen1/Gen2 common functions
107 int rsnd_src_ssi_mode_init(struct rsnd_mod *ssi_mod,
108 struct rsnd_dai *rdai,
109 struct rsnd_dai_stream *io)
111 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
112 int ssi_id = rsnd_mod_id(ssi_mod);
117 rsnd_mod_bset(ssi_mod, SSI_MODE0, (1 << ssi_id),
118 src_mod ? 0 : (1 << ssi_id));
123 if (rsnd_ssi_is_pin_sharing(ssi_mod)) {
138 rsnd_mod_bset(ssi_mod, SSI_MODE1,
140 rsnd_dai_is_clk_master(rdai) ?
141 0x2 << shift : 0x1 << shift);
147 int rsnd_src_enable_ssi_irq(struct rsnd_mod *ssi_mod,
148 struct rsnd_dai *rdai,
149 struct rsnd_dai_stream *io)
151 struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
153 /* enable PIO interrupt if Gen2 */
154 if (rsnd_is_gen2(priv))
155 rsnd_mod_write(ssi_mod, INT_ENABLE, 0x0f000000);
160 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv *priv,
161 struct rsnd_dai_stream *io,
162 struct snd_pcm_runtime *runtime)
164 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
165 struct rsnd_src *src;
166 unsigned int rate = 0;
169 src = rsnd_mod_to_src(src_mod);
172 * return convert rate if SRC is used,
173 * otherwise, return runtime->rate as usual
175 rate = rsnd_src_convert_rate(src);
179 rate = runtime->rate;
184 static int rsnd_src_set_convert_rate(struct rsnd_mod *mod,
185 struct rsnd_dai *rdai,
186 struct rsnd_dai_stream *io)
188 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
189 struct rsnd_src *src = rsnd_mod_to_src(mod);
190 u32 convert_rate = rsnd_src_convert_rate(src);
194 fsrate = 0x0400000 / convert_rate * runtime->rate;
196 /* set/clear soft reset */
197 rsnd_mod_write(mod, SRC_SWRSR, 0);
198 rsnd_mod_write(mod, SRC_SWRSR, 1);
201 * Initialize the operation of the SRC internal circuits
202 * see rsnd_src_start()
204 rsnd_mod_write(mod, SRC_SRCIR, 1);
206 /* Set channel number and output bit length */
207 rsnd_mod_write(mod, SRC_ADINR, rsnd_get_adinr(mod));
209 /* Enable the initial value of IFS */
211 rsnd_mod_write(mod, SRC_IFSCR, 1);
213 /* Set initial value of IFS */
214 rsnd_mod_write(mod, SRC_IFSVR, fsrate);
217 /* use DMA transfer */
218 rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);
223 static int rsnd_src_init(struct rsnd_mod *mod,
224 struct rsnd_dai *rdai,
225 struct rsnd_dai_stream *io)
227 struct rsnd_src *src = rsnd_mod_to_src(mod);
229 clk_prepare_enable(src->clk);
234 static int rsnd_src_quit(struct rsnd_mod *mod,
235 struct rsnd_dai *rdai,
236 struct rsnd_dai_stream *io)
238 struct rsnd_src *src = rsnd_mod_to_src(mod);
240 clk_disable_unprepare(src->clk);
245 static int rsnd_src_start(struct rsnd_mod *mod,
246 struct rsnd_dai *rdai,
247 struct rsnd_dai_stream *io)
249 struct rsnd_src *src = rsnd_mod_to_src(mod);
252 * Cancel the initialization and operate the SRC function
253 * see rsnd_src_set_convert_rate()
255 rsnd_mod_write(mod, SRC_SRCIR, 0);
257 if (rsnd_src_convert_rate(src))
258 rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
264 static int rsnd_src_stop(struct rsnd_mod *mod,
265 struct rsnd_dai *rdai,
266 struct rsnd_dai_stream *io)
268 struct rsnd_src *src = rsnd_mod_to_src(mod);
270 if (rsnd_src_convert_rate(src))
271 rsnd_mod_write(mod, SRC_ROUTE_MODE0, 0);
276 static struct rsnd_mod_ops rsnd_src_non_ops = {
283 static int rsnd_src_set_route_gen1(struct rsnd_mod *mod,
284 struct rsnd_dai *rdai,
285 struct rsnd_dai_stream *io)
287 struct src_route_config {
294 { 0x7, 12, }, /* 3 */
295 { 0x7, 16, }, /* 4 */
296 { 0x7, 20, }, /* 5 */
297 { 0x7, 24, }, /* 6 */
298 { 0x3, 28, }, /* 7 */
299 { 0x3, 30, }, /* 8 */
305 id = rsnd_mod_id(mod);
306 if (id < 0 || id >= ARRAY_SIZE(routes))
312 val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
313 val = val << routes[id].shift;
314 mask = routes[id].mask << routes[id].shift;
316 rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
321 static int rsnd_src_set_convert_timing_gen1(struct rsnd_mod *mod,
322 struct rsnd_dai *rdai,
323 struct rsnd_dai_stream *io)
325 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
326 struct rsnd_src *src = rsnd_mod_to_src(mod);
327 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
328 u32 convert_rate = rsnd_src_convert_rate(src);
332 int id = rsnd_mod_id(mod);
338 shift = (id % 4) * 8;
339 mask = 0x1F << shift;
342 * ADG is used as source clock if SRC was used,
343 * then, SSI WS is used as destination clock.
344 * SSI WS is used as source clock if SRC is not used
345 * (when playback, source/destination become reverse when capture)
351 ret = rsnd_adg_set_convert_clk_gen1(priv, mod,
354 } else if (8 == id) {
355 /* use SSI WS, but SRU8 is special */
359 val = (id + 1) << shift;
367 rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
370 rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
373 rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
380 static int rsnd_src_set_convert_rate_gen1(struct rsnd_mod *mod,
381 struct rsnd_dai *rdai,
382 struct rsnd_dai_stream *io)
386 ret = rsnd_src_set_convert_rate(mod, rdai, io);
390 /* Select SRC mode (fixed value) */
391 rsnd_mod_write(mod, SRC_SRCCR, 0x00010110);
393 /* Set the restriction value of the FS ratio (98%) */
394 rsnd_mod_write(mod, SRC_MNFSR,
395 rsnd_mod_read(mod, SRC_IFSVR) / 100 * 98);
397 /* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
402 static int rsnd_src_init_gen1(struct rsnd_mod *mod,
403 struct rsnd_dai *rdai,
404 struct rsnd_dai_stream *io)
408 ret = rsnd_src_init(mod, rdai, io);
412 ret = rsnd_src_set_route_gen1(mod, rdai, io);
416 ret = rsnd_src_set_convert_rate_gen1(mod, rdai, io);
420 ret = rsnd_src_set_convert_timing_gen1(mod, rdai, io);
427 static int rsnd_src_start_gen1(struct rsnd_mod *mod,
428 struct rsnd_dai *rdai,
429 struct rsnd_dai_stream *io)
431 int id = rsnd_mod_id(mod);
433 rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));
435 return rsnd_src_start(mod, rdai, io);
438 static int rsnd_src_stop_gen1(struct rsnd_mod *mod,
439 struct rsnd_dai *rdai,
440 struct rsnd_dai_stream *io)
442 int id = rsnd_mod_id(mod);
444 rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);
446 return rsnd_src_stop(mod, rdai, io);
449 static struct rsnd_mod_ops rsnd_src_gen1_ops = {
450 .name = "sru (gen1)",
451 .init = rsnd_src_init_gen1,
452 .quit = rsnd_src_quit,
453 .start = rsnd_src_start_gen1,
454 .stop = rsnd_src_stop_gen1,
460 static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod *mod,
461 struct rsnd_dai *rdai,
462 struct rsnd_dai_stream *io)
466 ret = rsnd_src_set_convert_rate(mod, rdai, io);
470 rsnd_mod_write(mod, SSI_BUSIF_ADINR, rsnd_get_adinr(mod));
471 rsnd_mod_write(mod, SSI_BUSIF_MODE, 1);
473 rsnd_mod_write(mod, SRC_SRCCR, 0x00011110);
475 rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);
476 rsnd_mod_write(mod, SRC_BSISR, 0x00100060);
481 static int rsnd_src_set_convert_timing_gen2(struct rsnd_mod *mod,
482 struct rsnd_dai *rdai,
483 struct rsnd_dai_stream *io)
485 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
486 struct rsnd_src *src = rsnd_mod_to_src(mod);
487 u32 convert_rate = rsnd_src_convert_rate(src);
491 ret = rsnd_adg_set_convert_clk_gen2(mod, rdai, io,
495 ret = rsnd_adg_set_convert_timing_gen2(mod, rdai, io);
500 static int rsnd_src_probe_gen2(struct rsnd_mod *mod,
501 struct rsnd_dai *rdai,
502 struct rsnd_dai_stream *io)
504 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
505 struct rsnd_src *src = rsnd_mod_to_src(mod);
506 struct device *dev = rsnd_priv_to_dev(priv);
509 ret = rsnd_dma_init(priv,
510 rsnd_mod_to_dma(mod),
511 rsnd_info_is_playback(priv, src),
514 dev_err(dev, "SRC DMA failed\n");
519 static int rsnd_src_remove_gen2(struct rsnd_mod *mod,
520 struct rsnd_dai *rdai,
521 struct rsnd_dai_stream *io)
523 rsnd_dma_quit(rsnd_mod_to_priv(mod), rsnd_mod_to_dma(mod));
528 static int rsnd_src_init_gen2(struct rsnd_mod *mod,
529 struct rsnd_dai *rdai,
530 struct rsnd_dai_stream *io)
534 ret = rsnd_src_init(mod, rdai, io);
538 ret = rsnd_src_set_convert_rate_gen2(mod, rdai, io);
542 ret = rsnd_src_set_convert_timing_gen2(mod, rdai, io);
549 static int rsnd_src_start_gen2(struct rsnd_mod *mod,
550 struct rsnd_dai *rdai,
551 struct rsnd_dai_stream *io)
553 struct rsnd_src *src = rsnd_mod_to_src(mod);
555 rsnd_dma_start(rsnd_mod_to_dma(&src->mod));
557 rsnd_mod_write(mod, SSI_CTRL, 0x1);
558 rsnd_mod_write(mod, SRC_CTRL, 0x11);
560 return rsnd_src_start(mod, rdai, io);
563 static int rsnd_src_stop_gen2(struct rsnd_mod *mod,
564 struct rsnd_dai *rdai,
565 struct rsnd_dai_stream *io)
567 struct rsnd_src *src = rsnd_mod_to_src(mod);
569 rsnd_mod_write(mod, SSI_CTRL, 0);
570 rsnd_mod_write(mod, SRC_CTRL, 0);
572 rsnd_dma_stop(rsnd_mod_to_dma(&src->mod));
574 return rsnd_src_stop(mod, rdai, io);
577 static struct rsnd_mod_ops rsnd_src_gen2_ops = {
578 .name = "src (gen2)",
579 .probe = rsnd_src_probe_gen2,
580 .remove = rsnd_src_remove_gen2,
581 .init = rsnd_src_init_gen2,
582 .quit = rsnd_src_quit,
583 .start = rsnd_src_start_gen2,
584 .stop = rsnd_src_stop_gen2,
587 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)
589 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv)))
592 return &((struct rsnd_src *)(priv->src) + id)->mod;
595 static void rsnd_of_parse_src(struct platform_device *pdev,
596 const struct rsnd_of_data *of_data,
597 struct rsnd_priv *priv)
599 struct device_node *src_node;
600 struct rcar_snd_info *info = rsnd_priv_to_info(priv);
601 struct rsnd_src_platform_info *src_info;
602 struct device *dev = &pdev->dev;
608 src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
612 nr = of_get_child_count(src_node);
616 src_info = devm_kzalloc(dev,
617 sizeof(struct rsnd_src_platform_info) * nr,
620 dev_err(dev, "src info allocation error\n");
624 info->src_info = src_info;
625 info->src_info_nr = nr;
628 int rsnd_src_probe(struct platform_device *pdev,
629 const struct rsnd_of_data *of_data,
630 struct rsnd_priv *priv)
632 struct rcar_snd_info *info = rsnd_priv_to_info(priv);
633 struct device *dev = rsnd_priv_to_dev(priv);
634 struct rsnd_src *src;
635 struct rsnd_mod_ops *ops;
637 char name[RSND_SRC_NAME_SIZE];
640 rsnd_of_parse_src(pdev, of_data, priv);
645 nr = info->src_info_nr;
649 src = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL);
651 dev_err(dev, "SRC allocate failed\n");
658 for_each_rsnd_src(src, priv, i) {
659 snprintf(name, RSND_SRC_NAME_SIZE, "src.%d", i);
661 clk = devm_clk_get(dev, name);
665 src->info = &info->src_info[i];
668 ops = &rsnd_src_non_ops;
669 if (rsnd_is_gen1(priv))
670 ops = &rsnd_src_gen1_ops;
671 if (rsnd_is_gen2(priv))
672 ops = &rsnd_src_gen2_ops;
674 rsnd_mod_init(priv, &src->mod, ops, RSND_MOD_SRC, i);
676 dev_dbg(dev, "SRC%d probed\n", i);