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.
13 #define SRC_NAME "src"
16 #define OUF_SRCO ((1 << 12) | (1 << 13))
17 #define OUF_SRCI ((1 << 9) | (1 << 8))
19 /* SCU_SYSTEM_STATUS0/1 */
20 #define OUF_SRC(id) ((1 << (id + 16)) | (1 << id))
25 struct rsnd_kctrl_cfg_s sen; /* sync convert enable */
26 struct rsnd_kctrl_cfg_s sync; /* sync convert */
27 u32 convert_rate; /* sampling rate convert */
32 #define RSND_SRC_NAME_SIZE 16
34 #define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id)
35 #define rsnd_src_to_dma(src) ((src)->dma)
36 #define rsnd_src_nr(priv) ((priv)->src_nr)
37 #define rsnd_enable_sync_convert(src) ((src)->sen.val)
39 #define rsnd_mod_to_src(_mod) \
40 container_of((_mod), struct rsnd_src, mod)
42 #define for_each_rsnd_src(pos, priv, i) \
44 ((i) < rsnd_src_nr(priv)) && \
45 ((pos) = (struct rsnd_src *)(priv)->src + i); \
50 * image of SRC (Sampling Rate Converter)
52 * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
53 * 48kHz <-> | SRC | <------> | SSI | <-----> | codec |
54 * 44.1kHz <-> +-----+ +-----+ +-------+
64 * [mem] -> [SRU] -> [SSI]
69 * [mem] -> [SRC] -> [SSIU] -> [SSI]
73 static void rsnd_src_activation(struct rsnd_mod *mod)
75 rsnd_mod_write(mod, SRC_SWRSR, 0);
76 rsnd_mod_write(mod, SRC_SWRSR, 1);
79 static void rsnd_src_halt(struct rsnd_mod *mod)
81 rsnd_mod_write(mod, SRC_SRCIR, 1);
82 rsnd_mod_write(mod, SRC_SWRSR, 0);
85 static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io,
88 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
89 int is_play = rsnd_io_is_play(io);
91 return rsnd_dma_request_channel(rsnd_src_of_node(priv),
93 is_play ? "rx" : "tx");
96 static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io,
99 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
105 if (!rsnd_enable_sync_convert(src))
106 return src->convert_rate;
108 convert_rate = src->sync.val;
111 convert_rate = src->convert_rate;
114 convert_rate = runtime->rate;
119 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv *priv,
120 struct rsnd_dai_stream *io,
121 struct snd_pcm_runtime *runtime)
123 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
124 struct rsnd_src *src;
125 unsigned int rate = 0;
128 src = rsnd_mod_to_src(src_mod);
131 * return convert rate if SRC is used,
132 * otherwise, return runtime->rate as usual
134 rate = rsnd_src_convert_rate(io, src);
138 rate = runtime->rate;
143 static int rsnd_src_hw_params(struct rsnd_mod *mod,
144 struct rsnd_dai_stream *io,
145 struct snd_pcm_substream *substream,
146 struct snd_pcm_hw_params *fe_params)
148 struct rsnd_src *src = rsnd_mod_to_src(mod);
149 struct snd_soc_pcm_runtime *fe = substream->private_data;
152 * SRC assumes that it is used under DPCM if user want to use
153 * sampling rate convert. Then, SRC should be FE.
154 * And then, this function will be called *after* BE settings.
155 * this means, each BE already has fixuped hw_params.
157 * dpcm_fe_dai_hw_params()
158 * dpcm_be_dai_hw_params()
160 if (fe->dai_link->dynamic) {
161 int stream = substream->stream;
162 struct snd_soc_dpcm *dpcm;
163 struct snd_pcm_hw_params *be_params;
165 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
166 be_params = &dpcm->hw_params;
168 if (params_rate(fe_params) != params_rate(be_params))
169 src->convert_rate = params_rate(be_params);
176 static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io,
177 struct rsnd_mod *mod)
179 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
180 struct device *dev = rsnd_priv_to_dev(priv);
181 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
182 struct rsnd_src *src = rsnd_mod_to_src(mod);
183 u32 convert_rate = rsnd_src_convert_rate(io, src);
184 u32 ifscr, fsrate, adinr;
192 /* 6 - 1/6 are very enough ratio for SRC_BSDSR */
195 else if (convert_rate > runtime->rate)
196 ratio = 100 * convert_rate / runtime->rate;
198 ratio = 100 * runtime->rate / convert_rate;
201 dev_err(dev, "FSO/FSI ratio error\n");
208 adinr = rsnd_get_adinr_bit(mod, io) |
209 rsnd_get_adinr_chan(mod, io);
212 * SRC_IFSCR / SRC_IFSVR
218 fsrate = 0x0400000 / convert_rate * runtime->rate;
222 * SRC_SRCCR / SRC_ROUTE_MODE0
229 if (rsnd_enable_sync_convert(src)) {
231 route |= rsnd_io_is_play(io) ?
232 (0x1 << 24) : (0x1 << 25);
237 * SRC_BSDSR / SRC_BSISR
239 switch (rsnd_mod_id(mod)) {
244 bsdsr = 0x02400000; /* 6 - 1/6 */
245 bsisr = 0x00100060; /* 6 - 1/6 */
248 bsdsr = 0x01800000; /* 6 - 1/6 */
249 bsisr = 0x00100060 ;/* 6 - 1/6 */
253 rsnd_mod_write(mod, SRC_SRCIR, 1); /* initialize */
254 rsnd_mod_write(mod, SRC_ADINR, adinr);
255 rsnd_mod_write(mod, SRC_IFSCR, ifscr);
256 rsnd_mod_write(mod, SRC_IFSVR, fsrate);
257 rsnd_mod_write(mod, SRC_SRCCR, cr);
258 rsnd_mod_write(mod, SRC_BSDSR, bsdsr);
259 rsnd_mod_write(mod, SRC_BSISR, bsisr);
260 rsnd_mod_write(mod, SRC_SRCIR, 0); /* cancel initialize */
262 rsnd_mod_write(mod, SRC_ROUTE_MODE0, route);
263 rsnd_mod_write(mod, SRC_I_BUSIF_MODE, 1);
264 rsnd_mod_write(mod, SRC_O_BUSIF_MODE, 1);
265 rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io));
268 rsnd_adg_set_convert_clk_gen2(mod, io,
272 rsnd_adg_set_convert_timing_gen2(mod, io);
275 #define rsnd_src_irq_enable(mod) rsnd_src_irq_ctrol(mod, 1)
276 #define rsnd_src_irq_disable(mod) rsnd_src_irq_ctrol(mod, 0)
277 static void rsnd_src_irq_ctrol(struct rsnd_mod *mod, int enable)
279 struct rsnd_src *src = rsnd_mod_to_src(mod);
280 u32 sys_int_val, int_val, sys_int_mask;
282 int id = rsnd_mod_id(mod);
285 sys_int_mask = OUF_SRC(id);
289 * IRQ is not supported on non-DT
293 if ((irq <= 0) || !enable) {
301 * ignore over flow error when rsnd_enable_sync_convert()
303 if (rsnd_enable_sync_convert(src))
304 sys_int_val = sys_int_val & 0xffff;
306 rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val);
307 rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val);
308 rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val);
311 static void rsnd_src_status_clear(struct rsnd_mod *mod)
313 u32 val = OUF_SRC(rsnd_mod_id(mod));
315 rsnd_mod_bset(mod, SCU_SYS_STATUS0, val, val);
316 rsnd_mod_bset(mod, SCU_SYS_STATUS1, val, val);
319 static bool rsnd_src_record_error(struct rsnd_mod *mod)
321 struct rsnd_src *src = rsnd_mod_to_src(mod);
325 val0 = val1 = OUF_SRC(rsnd_mod_id(mod));
330 * ignore over flow error when rsnd_enable_sync_convert()
332 if (rsnd_enable_sync_convert(src))
333 val0 = val0 & 0xffff;
335 if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val0) ||
336 (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val1)) {
337 struct rsnd_src *src = rsnd_mod_to_src(mod);
346 static int rsnd_src_start(struct rsnd_mod *mod,
347 struct rsnd_dai_stream *io,
348 struct rsnd_priv *priv)
350 struct rsnd_src *src = rsnd_mod_to_src(mod);
356 * Enable SRC output if you want to use sync convert together with DVC
358 val = (rsnd_io_to_mod_dvc(io) && !rsnd_enable_sync_convert(src)) ?
361 rsnd_mod_write(mod, SRC_CTRL, val);
366 static int rsnd_src_stop(struct rsnd_mod *mod,
367 struct rsnd_dai_stream *io,
368 struct rsnd_priv *priv)
371 * stop SRC output only
374 rsnd_mod_write(mod, SRC_CTRL, 0x01);
379 static int rsnd_src_init(struct rsnd_mod *mod,
380 struct rsnd_dai_stream *io,
381 struct rsnd_priv *priv)
383 struct rsnd_src *src = rsnd_mod_to_src(mod);
385 rsnd_mod_power_on(mod);
387 rsnd_src_activation(mod);
389 rsnd_src_set_convert_rate(io, mod);
391 rsnd_src_status_clear(mod);
393 rsnd_src_irq_enable(mod);
397 /* reset sync convert_rate */
403 static int rsnd_src_quit(struct rsnd_mod *mod,
404 struct rsnd_dai_stream *io,
405 struct rsnd_priv *priv)
407 struct rsnd_src *src = rsnd_mod_to_src(mod);
408 struct device *dev = rsnd_priv_to_dev(priv);
410 rsnd_src_irq_disable(mod);
412 /* stop both out/in */
413 rsnd_mod_write(mod, SRC_CTRL, 0);
417 rsnd_mod_power_off(mod);
420 dev_warn(dev, "%s[%d] under/over flow err = %d\n",
421 rsnd_mod_name(mod), rsnd_mod_id(mod), src->err);
423 src->convert_rate = 0;
425 /* reset sync convert_rate */
431 static void __rsnd_src_interrupt(struct rsnd_mod *mod,
432 struct rsnd_dai_stream *io)
434 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
435 struct rsnd_src *src = rsnd_mod_to_src(mod);
436 struct device *dev = rsnd_priv_to_dev(priv);
438 spin_lock(&priv->lock);
440 /* ignore all cases if not working */
441 if (!rsnd_io_is_working(io))
442 goto rsnd_src_interrupt_out;
444 if (rsnd_src_record_error(mod)) {
446 dev_dbg(dev, "%s[%d] restart\n",
447 rsnd_mod_name(mod), rsnd_mod_id(mod));
449 rsnd_src_stop(mod, io, priv);
450 rsnd_src_start(mod, io, priv);
453 if (src->err > 1024) {
454 rsnd_src_irq_disable(mod);
456 dev_warn(dev, "no more %s[%d] restart\n",
457 rsnd_mod_name(mod), rsnd_mod_id(mod));
460 rsnd_src_status_clear(mod);
461 rsnd_src_interrupt_out:
463 spin_unlock(&priv->lock);
466 static irqreturn_t rsnd_src_interrupt(int irq, void *data)
468 struct rsnd_mod *mod = data;
470 rsnd_mod_interrupt(mod, __rsnd_src_interrupt);
475 static int rsnd_src_probe_(struct rsnd_mod *mod,
476 struct rsnd_dai_stream *io,
477 struct rsnd_priv *priv)
479 struct rsnd_src *src = rsnd_mod_to_src(mod);
480 struct device *dev = rsnd_priv_to_dev(priv);
486 * IRQ is not supported on non-DT
488 * rsnd_src_irq_enable()
490 ret = devm_request_irq(dev, irq,
498 src->dma = rsnd_dma_attach(io, mod, 0);
499 if (IS_ERR(src->dma))
500 return PTR_ERR(src->dma);
505 static int rsnd_src_pcm_new(struct rsnd_mod *mod,
506 struct rsnd_dai_stream *io,
507 struct snd_soc_pcm_runtime *rtd)
509 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
510 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
511 struct rsnd_src *src = rsnd_mod_to_src(mod);
515 * enable SRC sync convert if possible
519 * SRC sync convert needs clock master
521 if (!rsnd_rdai_is_clk_master(rdai))
525 * SRC In doesn't work if DVC was enabled
527 if (dvc && !rsnd_io_is_play(io))
531 * enable sync convert
533 ret = rsnd_kctrl_new_s(mod, io, rtd,
534 rsnd_io_is_play(io) ?
535 "SRC Out Rate Switch" :
536 "SRC In Rate Switch",
537 rsnd_src_set_convert_rate,
542 ret = rsnd_kctrl_new_s(mod, io, rtd,
543 rsnd_io_is_play(io) ?
546 rsnd_src_set_convert_rate,
552 static struct rsnd_mod_ops rsnd_src_ops = {
554 .dma_req = rsnd_src_dma_req,
555 .probe = rsnd_src_probe_,
556 .init = rsnd_src_init,
557 .quit = rsnd_src_quit,
558 .start = rsnd_src_start,
559 .stop = rsnd_src_stop,
560 .hw_params = rsnd_src_hw_params,
561 .pcm_new = rsnd_src_pcm_new,
564 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)
566 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv)))
569 return rsnd_mod_get(rsnd_src_get(priv, id));
572 int rsnd_src_probe(struct rsnd_priv *priv)
574 struct device_node *node;
575 struct device_node *np;
576 struct device *dev = rsnd_priv_to_dev(priv);
577 struct rsnd_src *src;
579 char name[RSND_SRC_NAME_SIZE];
582 /* This driver doesn't support Gen1 at this point */
583 if (rsnd_is_gen1(priv))
586 node = rsnd_src_of_node(priv);
588 return 0; /* not used is not error */
590 nr = of_get_child_count(node);
593 goto rsnd_src_probe_done;
596 src = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL);
599 goto rsnd_src_probe_done;
606 for_each_child_of_node(node, np) {
607 src = rsnd_src_get(priv, i);
609 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d",
612 src->irq = irq_of_parse_and_map(np, 0);
615 goto rsnd_src_probe_done;
618 clk = devm_clk_get(dev, name);
621 goto rsnd_src_probe_done;
624 ret = rsnd_mod_init(priv, rsnd_mod_get(src),
625 &rsnd_src_ops, clk, RSND_MOD_SRC, i);
627 goto rsnd_src_probe_done;
640 void rsnd_src_remove(struct rsnd_priv *priv)
642 struct rsnd_src *src;
645 for_each_rsnd_src(src, priv, i) {
646 rsnd_mod_quit(rsnd_mod_get(src));