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)
110 struct rsnd_dai_stream *io = rsnd_mod_to_io(ssi_mod);
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)
150 struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod);
152 /* enable PIO interrupt if Gen2 */
153 if (rsnd_is_gen2(priv))
154 rsnd_mod_write(ssi_mod, INT_ENABLE, 0x0f000000);
159 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv *priv,
160 struct rsnd_dai_stream *io,
161 struct snd_pcm_runtime *runtime)
163 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
164 struct rsnd_src *src;
165 unsigned int rate = 0;
168 src = rsnd_mod_to_src(src_mod);
171 * return convert rate if SRC is used,
172 * otherwise, return runtime->rate as usual
174 rate = rsnd_src_convert_rate(src);
178 rate = runtime->rate;
183 static int rsnd_src_set_convert_rate(struct rsnd_mod *mod,
184 struct rsnd_dai *rdai)
186 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
187 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
188 struct rsnd_src *src = rsnd_mod_to_src(mod);
189 u32 convert_rate = rsnd_src_convert_rate(src);
193 fsrate = 0x0400000 / convert_rate * runtime->rate;
195 /* set/clear soft reset */
196 rsnd_mod_write(mod, SRC_SWRSR, 0);
197 rsnd_mod_write(mod, SRC_SWRSR, 1);
200 * Initialize the operation of the SRC internal circuits
201 * see rsnd_src_start()
203 rsnd_mod_write(mod, SRC_SRCIR, 1);
205 /* Set channel number and output bit length */
206 rsnd_mod_write(mod, SRC_ADINR, rsnd_get_adinr(mod));
208 /* Enable the initial value of IFS */
210 rsnd_mod_write(mod, SRC_IFSCR, 1);
212 /* Set initial value of IFS */
213 rsnd_mod_write(mod, SRC_IFSVR, fsrate);
216 /* use DMA transfer */
217 rsnd_mod_write(mod, SRC_BUSIF_MODE, 1);
222 static int rsnd_src_init(struct rsnd_mod *mod,
223 struct rsnd_dai *rdai)
225 struct rsnd_src *src = rsnd_mod_to_src(mod);
227 clk_prepare_enable(src->clk);
232 static int rsnd_src_quit(struct rsnd_mod *mod,
233 struct rsnd_dai *rdai)
235 struct rsnd_src *src = rsnd_mod_to_src(mod);
237 clk_disable_unprepare(src->clk);
242 static int rsnd_src_start(struct rsnd_mod *mod,
243 struct rsnd_dai *rdai)
245 struct rsnd_src *src = rsnd_mod_to_src(mod);
248 * Cancel the initialization and operate the SRC function
249 * see rsnd_src_set_convert_rate()
251 rsnd_mod_write(mod, SRC_SRCIR, 0);
253 if (rsnd_src_convert_rate(src))
254 rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1);
260 static int rsnd_src_stop(struct rsnd_mod *mod,
261 struct rsnd_dai *rdai)
263 struct rsnd_src *src = rsnd_mod_to_src(mod);
265 if (rsnd_src_convert_rate(src))
266 rsnd_mod_write(mod, SRC_ROUTE_MODE0, 0);
271 static struct rsnd_mod_ops rsnd_src_non_ops = {
278 static int rsnd_src_set_route_gen1(struct rsnd_mod *mod,
279 struct rsnd_dai *rdai)
281 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
282 struct src_route_config {
289 { 0x7, 12, }, /* 3 */
290 { 0x7, 16, }, /* 4 */
291 { 0x7, 20, }, /* 5 */
292 { 0x7, 24, }, /* 6 */
293 { 0x3, 28, }, /* 7 */
294 { 0x3, 30, }, /* 8 */
300 id = rsnd_mod_id(mod);
301 if (id < 0 || id >= ARRAY_SIZE(routes))
307 val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
308 val = val << routes[id].shift;
309 mask = routes[id].mask << routes[id].shift;
311 rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);
316 static int rsnd_src_set_convert_timing_gen1(struct rsnd_mod *mod,
317 struct rsnd_dai *rdai)
319 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
320 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
321 struct rsnd_src *src = rsnd_mod_to_src(mod);
322 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
323 u32 convert_rate = rsnd_src_convert_rate(src);
327 int id = rsnd_mod_id(mod);
333 shift = (id % 4) * 8;
334 mask = 0x1F << shift;
337 * ADG is used as source clock if SRC was used,
338 * then, SSI WS is used as destination clock.
339 * SSI WS is used as source clock if SRC is not used
340 * (when playback, source/destination become reverse when capture)
346 ret = rsnd_adg_set_convert_clk_gen1(priv, mod,
349 } else if (8 == id) {
350 /* use SSI WS, but SRU8 is special */
354 val = (id + 1) << shift;
362 rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
365 rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
368 rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
375 static int rsnd_src_set_convert_rate_gen1(struct rsnd_mod *mod,
376 struct rsnd_dai *rdai)
380 ret = rsnd_src_set_convert_rate(mod, rdai);
384 /* Select SRC mode (fixed value) */
385 rsnd_mod_write(mod, SRC_SRCCR, 0x00010110);
387 /* Set the restriction value of the FS ratio (98%) */
388 rsnd_mod_write(mod, SRC_MNFSR,
389 rsnd_mod_read(mod, SRC_IFSVR) / 100 * 98);
391 /* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */
396 static int rsnd_src_init_gen1(struct rsnd_mod *mod,
397 struct rsnd_dai *rdai)
401 ret = rsnd_src_init(mod, rdai);
405 ret = rsnd_src_set_route_gen1(mod, rdai);
409 ret = rsnd_src_set_convert_rate_gen1(mod, rdai);
413 ret = rsnd_src_set_convert_timing_gen1(mod, rdai);
420 static int rsnd_src_start_gen1(struct rsnd_mod *mod,
421 struct rsnd_dai *rdai)
423 int id = rsnd_mod_id(mod);
425 rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id));
427 return rsnd_src_start(mod, rdai);
430 static int rsnd_src_stop_gen1(struct rsnd_mod *mod,
431 struct rsnd_dai *rdai)
433 int id = rsnd_mod_id(mod);
435 rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0);
437 return rsnd_src_stop(mod, rdai);
440 static struct rsnd_mod_ops rsnd_src_gen1_ops = {
441 .name = "sru (gen1)",
442 .init = rsnd_src_init_gen1,
443 .quit = rsnd_src_quit,
444 .start = rsnd_src_start_gen1,
445 .stop = rsnd_src_stop_gen1,
451 static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod *mod,
452 struct rsnd_dai *rdai)
456 ret = rsnd_src_set_convert_rate(mod, rdai);
460 rsnd_mod_write(mod, SSI_BUSIF_ADINR, rsnd_get_adinr(mod));
461 rsnd_mod_write(mod, SSI_BUSIF_MODE, 1);
463 rsnd_mod_write(mod, SRC_SRCCR, 0x00011110);
465 rsnd_mod_write(mod, SRC_BSDSR, 0x01800000);
466 rsnd_mod_write(mod, SRC_BSISR, 0x00100060);
471 static int rsnd_src_set_convert_timing_gen2(struct rsnd_mod *mod,
472 struct rsnd_dai *rdai)
474 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
475 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
476 struct rsnd_src *src = rsnd_mod_to_src(mod);
477 u32 convert_rate = rsnd_src_convert_rate(src);
481 ret = rsnd_adg_set_convert_clk_gen2(mod, rdai, io,
485 ret = rsnd_adg_set_convert_timing_gen2(mod, rdai, io);
490 static int rsnd_src_probe_gen2(struct rsnd_mod *mod,
491 struct rsnd_dai *rdai)
493 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
494 struct rsnd_src *src = rsnd_mod_to_src(mod);
495 struct device *dev = rsnd_priv_to_dev(priv);
498 ret = rsnd_dma_init(priv,
499 rsnd_mod_to_dma(mod),
500 rsnd_info_is_playback(priv, src),
503 dev_err(dev, "SRC DMA failed\n");
508 static int rsnd_src_remove_gen2(struct rsnd_mod *mod,
509 struct rsnd_dai *rdai)
511 rsnd_dma_quit(rsnd_mod_to_priv(mod), rsnd_mod_to_dma(mod));
516 static int rsnd_src_init_gen2(struct rsnd_mod *mod,
517 struct rsnd_dai *rdai)
521 ret = rsnd_src_init(mod, rdai);
525 ret = rsnd_src_set_convert_rate_gen2(mod, rdai);
529 ret = rsnd_src_set_convert_timing_gen2(mod, rdai);
536 static int rsnd_src_start_gen2(struct rsnd_mod *mod,
537 struct rsnd_dai *rdai)
539 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
540 struct rsnd_src *src = rsnd_mod_to_src(mod);
541 u32 val = rsnd_io_to_mod_dvc(io) ? 0x01 : 0x11;
543 rsnd_dma_start(rsnd_mod_to_dma(&src->mod));
545 rsnd_mod_write(mod, SSI_CTRL, 0x1);
546 rsnd_mod_write(mod, SRC_CTRL, val);
548 return rsnd_src_start(mod, rdai);
551 static int rsnd_src_stop_gen2(struct rsnd_mod *mod,
552 struct rsnd_dai *rdai)
554 struct rsnd_src *src = rsnd_mod_to_src(mod);
556 rsnd_mod_write(mod, SSI_CTRL, 0);
557 rsnd_mod_write(mod, SRC_CTRL, 0);
559 rsnd_dma_stop(rsnd_mod_to_dma(&src->mod));
561 return rsnd_src_stop(mod, rdai);
564 static struct rsnd_mod_ops rsnd_src_gen2_ops = {
565 .name = "src (gen2)",
566 .probe = rsnd_src_probe_gen2,
567 .remove = rsnd_src_remove_gen2,
568 .init = rsnd_src_init_gen2,
569 .quit = rsnd_src_quit,
570 .start = rsnd_src_start_gen2,
571 .stop = rsnd_src_stop_gen2,
574 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)
576 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv)))
579 return &((struct rsnd_src *)(priv->src) + id)->mod;
582 static void rsnd_of_parse_src(struct platform_device *pdev,
583 const struct rsnd_of_data *of_data,
584 struct rsnd_priv *priv)
586 struct device_node *src_node;
587 struct rcar_snd_info *info = rsnd_priv_to_info(priv);
588 struct rsnd_src_platform_info *src_info;
589 struct device *dev = &pdev->dev;
595 src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
599 nr = of_get_child_count(src_node);
603 src_info = devm_kzalloc(dev,
604 sizeof(struct rsnd_src_platform_info) * nr,
607 dev_err(dev, "src info allocation error\n");
611 info->src_info = src_info;
612 info->src_info_nr = nr;
615 int rsnd_src_probe(struct platform_device *pdev,
616 const struct rsnd_of_data *of_data,
617 struct rsnd_priv *priv)
619 struct rcar_snd_info *info = rsnd_priv_to_info(priv);
620 struct device *dev = rsnd_priv_to_dev(priv);
621 struct rsnd_src *src;
622 struct rsnd_mod_ops *ops;
624 char name[RSND_SRC_NAME_SIZE];
627 rsnd_of_parse_src(pdev, of_data, priv);
632 nr = info->src_info_nr;
636 src = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL);
638 dev_err(dev, "SRC allocate failed\n");
645 for_each_rsnd_src(src, priv, i) {
646 snprintf(name, RSND_SRC_NAME_SIZE, "src.%d", i);
648 clk = devm_clk_get(dev, name);
652 src->info = &info->src_info[i];
655 ops = &rsnd_src_non_ops;
656 if (rsnd_is_gen1(priv))
657 ops = &rsnd_src_gen1_ops;
658 if (rsnd_is_gen2(priv))
659 ops = &rsnd_src_gen2_ops;
661 rsnd_mod_init(priv, &src->mod, ops, RSND_MOD_SRC, i);
663 dev_dbg(dev, "SRC%d probed\n", i);