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 */
31 #define RSND_SRC_NAME_SIZE 16
33 #define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id)
34 #define rsnd_src_to_dma(src) ((src)->dma)
35 #define rsnd_src_nr(priv) ((priv)->src_nr)
36 #define rsnd_enable_sync_convert(src) ((src)->sen.val)
38 #define rsnd_mod_to_src(_mod) \
39 container_of((_mod), struct rsnd_src, mod)
41 #define for_each_rsnd_src(pos, priv, i) \
43 ((i) < rsnd_src_nr(priv)) && \
44 ((pos) = (struct rsnd_src *)(priv)->src + i); \
49 * image of SRC (Sampling Rate Converter)
51 * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
52 * 48kHz <-> | SRC | <------> | SSI | <-----> | codec |
53 * 44.1kHz <-> +-----+ +-----+ +-------+
63 * [mem] -> [SRU] -> [SSI]
68 * [mem] -> [SRC] -> [SSIU] -> [SSI]
72 static void rsnd_src_activation(struct rsnd_mod *mod)
74 rsnd_mod_write(mod, SRC_SWRSR, 0);
75 rsnd_mod_write(mod, SRC_SWRSR, 1);
78 static void rsnd_src_halt(struct rsnd_mod *mod)
80 rsnd_mod_write(mod, SRC_SRCIR, 1);
81 rsnd_mod_write(mod, SRC_SWRSR, 0);
84 static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io,
87 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
88 int is_play = rsnd_io_is_play(io);
90 return rsnd_dma_request_channel(rsnd_src_of_node(priv),
92 is_play ? "rx" : "tx");
95 static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io,
98 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
104 if (!rsnd_enable_sync_convert(src))
105 return src->convert_rate;
107 convert_rate = src->sync.val;
110 convert_rate = src->convert_rate;
113 convert_rate = runtime->rate;
118 unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv *priv,
119 struct rsnd_dai_stream *io,
120 struct snd_pcm_runtime *runtime)
122 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
123 struct rsnd_src *src;
124 unsigned int rate = 0;
127 src = rsnd_mod_to_src(src_mod);
130 * return convert rate if SRC is used,
131 * otherwise, return runtime->rate as usual
133 rate = rsnd_src_convert_rate(io, src);
137 rate = runtime->rate;
142 static int rsnd_src_hw_params(struct rsnd_mod *mod,
143 struct rsnd_dai_stream *io,
144 struct snd_pcm_substream *substream,
145 struct snd_pcm_hw_params *fe_params)
147 struct rsnd_src *src = rsnd_mod_to_src(mod);
148 struct snd_soc_pcm_runtime *fe = substream->private_data;
151 * SRC assumes that it is used under DPCM if user want to use
152 * sampling rate convert. Then, SRC should be FE.
153 * And then, this function will be called *after* BE settings.
154 * this means, each BE already has fixuped hw_params.
156 * dpcm_fe_dai_hw_params()
157 * dpcm_be_dai_hw_params()
159 if (fe->dai_link->dynamic) {
160 int stream = substream->stream;
161 struct snd_soc_dpcm *dpcm;
162 struct snd_pcm_hw_params *be_params;
164 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
165 be_params = &dpcm->hw_params;
167 if (params_rate(fe_params) != params_rate(be_params))
168 src->convert_rate = params_rate(be_params);
175 static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io,
176 struct rsnd_mod *mod)
178 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
179 struct device *dev = rsnd_priv_to_dev(priv);
180 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
181 struct rsnd_src *src = rsnd_mod_to_src(mod);
182 u32 convert_rate = rsnd_src_convert_rate(io, src);
183 u32 ifscr, fsrate, adinr;
191 /* 6 - 1/6 are very enough ratio for SRC_BSDSR */
194 else if (convert_rate > runtime->rate)
195 ratio = 100 * convert_rate / runtime->rate;
197 ratio = 100 * runtime->rate / convert_rate;
200 dev_err(dev, "FSO/FSI ratio error\n");
207 adinr = rsnd_get_adinr_bit(mod, io) |
208 rsnd_get_adinr_chan(mod, io);
211 * SRC_IFSCR / SRC_IFSVR
217 fsrate = 0x0400000 / convert_rate * runtime->rate;
221 * SRC_SRCCR / SRC_ROUTE_MODE0
228 if (rsnd_enable_sync_convert(src)) {
230 route |= rsnd_io_is_play(io) ?
231 (0x1 << 24) : (0x1 << 25);
236 * SRC_BSDSR / SRC_BSISR
238 switch (rsnd_mod_id(mod)) {
243 bsdsr = 0x02400000; /* 6 - 1/6 */
244 bsisr = 0x00100060; /* 6 - 1/6 */
247 bsdsr = 0x01800000; /* 6 - 1/6 */
248 bsisr = 0x00100060 ;/* 6 - 1/6 */
252 rsnd_mod_write(mod, SRC_SRCIR, 1); /* initialize */
253 rsnd_mod_write(mod, SRC_ADINR, adinr);
254 rsnd_mod_write(mod, SRC_IFSCR, ifscr);
255 rsnd_mod_write(mod, SRC_IFSVR, fsrate);
256 rsnd_mod_write(mod, SRC_SRCCR, cr);
257 rsnd_mod_write(mod, SRC_BSDSR, bsdsr);
258 rsnd_mod_write(mod, SRC_BSISR, bsisr);
259 rsnd_mod_write(mod, SRC_SRCIR, 0); /* cancel initialize */
261 rsnd_mod_write(mod, SRC_ROUTE_MODE0, route);
262 rsnd_mod_write(mod, SRC_I_BUSIF_MODE, 1);
263 rsnd_mod_write(mod, SRC_O_BUSIF_MODE, 1);
264 rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io));
267 rsnd_adg_set_convert_clk_gen2(mod, io,
271 rsnd_adg_set_convert_timing_gen2(mod, io);
274 static int rsnd_src_irq(struct rsnd_mod *mod,
275 struct rsnd_dai_stream *io,
276 struct rsnd_priv *priv,
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);
313 static void rsnd_src_status_clear(struct rsnd_mod *mod)
315 u32 val = OUF_SRC(rsnd_mod_id(mod));
317 rsnd_mod_bset(mod, SCU_SYS_STATUS0, val, val);
318 rsnd_mod_bset(mod, SCU_SYS_STATUS1, val, val);
321 static bool rsnd_src_error_occurred(struct rsnd_mod *mod)
323 struct rsnd_src *src = rsnd_mod_to_src(mod);
327 val0 = val1 = OUF_SRC(rsnd_mod_id(mod));
332 * ignore over flow error when rsnd_enable_sync_convert()
334 if (rsnd_enable_sync_convert(src))
335 val0 = val0 & 0xffff;
337 if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val0) ||
338 (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val1))
344 static int rsnd_src_start(struct rsnd_mod *mod,
345 struct rsnd_dai_stream *io,
346 struct rsnd_priv *priv)
348 struct rsnd_src *src = rsnd_mod_to_src(mod);
354 * Enable SRC output if you want to use sync convert together with DVC
356 val = (rsnd_io_to_mod_dvc(io) && !rsnd_enable_sync_convert(src)) ?
359 rsnd_mod_write(mod, SRC_CTRL, val);
364 static int rsnd_src_stop(struct rsnd_mod *mod,
365 struct rsnd_dai_stream *io,
366 struct rsnd_priv *priv)
368 rsnd_mod_write(mod, SRC_CTRL, 0);
373 static int rsnd_src_init(struct rsnd_mod *mod,
374 struct rsnd_dai_stream *io,
375 struct rsnd_priv *priv)
377 struct rsnd_src *src = rsnd_mod_to_src(mod);
379 rsnd_mod_power_on(mod);
381 rsnd_src_activation(mod);
383 rsnd_src_set_convert_rate(io, mod);
385 rsnd_src_status_clear(mod);
387 /* reset sync convert_rate */
393 static int rsnd_src_quit(struct rsnd_mod *mod,
394 struct rsnd_dai_stream *io,
395 struct rsnd_priv *priv)
397 struct rsnd_src *src = rsnd_mod_to_src(mod);
401 rsnd_mod_power_off(mod);
403 src->convert_rate = 0;
405 /* reset sync convert_rate */
411 static void __rsnd_src_interrupt(struct rsnd_mod *mod,
412 struct rsnd_dai_stream *io)
414 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
417 spin_lock(&priv->lock);
419 /* ignore all cases if not working */
420 if (!rsnd_io_is_working(io))
421 goto rsnd_src_interrupt_out;
423 if (rsnd_src_error_occurred(mod))
426 rsnd_src_status_clear(mod);
427 rsnd_src_interrupt_out:
429 spin_unlock(&priv->lock);
432 snd_pcm_stop_xrun(io->substream);
435 static irqreturn_t rsnd_src_interrupt(int irq, void *data)
437 struct rsnd_mod *mod = data;
439 rsnd_mod_interrupt(mod, __rsnd_src_interrupt);
444 static int rsnd_src_probe_(struct rsnd_mod *mod,
445 struct rsnd_dai_stream *io,
446 struct rsnd_priv *priv)
448 struct rsnd_src *src = rsnd_mod_to_src(mod);
449 struct device *dev = rsnd_priv_to_dev(priv);
455 * IRQ is not supported on non-DT
459 ret = devm_request_irq(dev, irq,
467 ret = rsnd_dma_attach(io, mod, &src->dma, 0);
472 static int rsnd_src_pcm_new(struct rsnd_mod *mod,
473 struct rsnd_dai_stream *io,
474 struct snd_soc_pcm_runtime *rtd)
476 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
477 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
478 struct rsnd_src *src = rsnd_mod_to_src(mod);
482 * enable SRC sync convert if possible
486 * SRC sync convert needs clock master
488 if (!rsnd_rdai_is_clk_master(rdai))
492 * SRC In doesn't work if DVC was enabled
494 if (dvc && !rsnd_io_is_play(io))
498 * enable sync convert
500 ret = rsnd_kctrl_new_s(mod, io, rtd,
501 rsnd_io_is_play(io) ?
502 "SRC Out Rate Switch" :
503 "SRC In Rate Switch",
504 rsnd_src_set_convert_rate,
509 ret = rsnd_kctrl_new_s(mod, io, rtd,
510 rsnd_io_is_play(io) ?
513 rsnd_src_set_convert_rate,
519 static struct rsnd_mod_ops rsnd_src_ops = {
521 .dma_req = rsnd_src_dma_req,
522 .probe = rsnd_src_probe_,
523 .init = rsnd_src_init,
524 .quit = rsnd_src_quit,
525 .start = rsnd_src_start,
526 .stop = rsnd_src_stop,
528 .hw_params = rsnd_src_hw_params,
529 .pcm_new = rsnd_src_pcm_new,
532 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)
534 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv)))
537 return rsnd_mod_get(rsnd_src_get(priv, id));
540 int rsnd_src_probe(struct rsnd_priv *priv)
542 struct device_node *node;
543 struct device_node *np;
544 struct device *dev = rsnd_priv_to_dev(priv);
545 struct rsnd_src *src;
547 char name[RSND_SRC_NAME_SIZE];
550 /* This driver doesn't support Gen1 at this point */
551 if (rsnd_is_gen1(priv))
554 node = rsnd_src_of_node(priv);
556 return 0; /* not used is not error */
558 nr = of_get_child_count(node);
561 goto rsnd_src_probe_done;
564 src = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL);
567 goto rsnd_src_probe_done;
574 for_each_child_of_node(node, np) {
575 src = rsnd_src_get(priv, i);
577 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d",
580 src->irq = irq_of_parse_and_map(np, 0);
583 goto rsnd_src_probe_done;
586 clk = devm_clk_get(dev, name);
589 goto rsnd_src_probe_done;
592 ret = rsnd_mod_init(priv, rsnd_mod_get(src),
593 &rsnd_src_ops, clk, rsnd_mod_get_status,
596 goto rsnd_src_probe_done;
609 void rsnd_src_remove(struct rsnd_priv *priv)
611 struct rsnd_src *src;
614 for_each_rsnd_src(src, priv, i) {
615 rsnd_mod_quit(rsnd_mod_get(src));