1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Renesas R-Car SRC support
4 //
5 // Copyright (C) 2013 Renesas Solutions Corp.
6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7
8 /*
9 * You can use Synchronous Sampling Rate Convert (if no DVC)
10 *
11 * amixer set "SRC Out Rate" on
12 * aplay xxx.wav &
13 * amixer set "SRC Out Rate" 96000 // convert rate to 96000Hz
14 * amixer set "SRC Out Rate" 22050 // convert rate to 22050Hz
15 */
16
17 /*
18 * you can enable below define if you don't need
19 * SSI interrupt status debug message when debugging
20 * see rsnd_print_irq_status()
21 *
22 * #define RSND_DEBUG_NO_IRQ_STATUS 1
23 */
24
25 #include <linux/of_irq.h>
26 #include "rsnd.h"
27
28 #define SRC_NAME "src"
29
30 /* SCU_SYSTEM_STATUS0/1 */
31 #define OUF_SRC(id) ((1 << (id + 16)) | (1 << id))
32
33 struct rsnd_src {
34 struct rsnd_mod mod;
35 struct rsnd_mod *dma;
36 struct rsnd_kctrl_cfg_s sen; /* sync convert enable */
37 struct rsnd_kctrl_cfg_s sync; /* sync convert */
38 u32 current_sync_rate;
39 int irq;
40 };
41
42 #define RSND_SRC_NAME_SIZE 16
43
44 #define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id)
45 #define rsnd_src_nr(priv) ((priv)->src_nr)
46 #define rsnd_src_sync_is_enabled(mod) (rsnd_mod_to_src(mod)->sen.val)
47
48 #define rsnd_mod_to_src(_mod) \
49 container_of((_mod), struct rsnd_src, mod)
50
51 #define for_each_rsnd_src(pos, priv, i) \
52 for ((i) = 0; \
53 ((i) < rsnd_src_nr(priv)) && \
54 ((pos) = (struct rsnd_src *)(priv)->src + i); \
55 i++)
56
57
58 /*
59 * image of SRC (Sampling Rate Converter)
60 *
61 * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+
62 * 48kHz <-> | SRC | <------> | SSI | <-----> | codec |
63 * 44.1kHz <-> +-----+ +-----+ +-------+
64 * ...
65 *
66 */
67
rsnd_src_activation(struct rsnd_mod * mod)68 static void rsnd_src_activation(struct rsnd_mod *mod)
69 {
70 rsnd_mod_write(mod, SRC_SWRSR, 0);
71 rsnd_mod_write(mod, SRC_SWRSR, 1);
72 }
73
rsnd_src_halt(struct rsnd_mod * mod)74 static void rsnd_src_halt(struct rsnd_mod *mod)
75 {
76 rsnd_mod_write(mod, SRC_SRCIR, 1);
77 rsnd_mod_write(mod, SRC_SWRSR, 0);
78 }
79
rsnd_src_dma_req(struct rsnd_dai_stream * io,struct rsnd_mod * mod)80 static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io,
81 struct rsnd_mod *mod)
82 {
83 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
84 int is_play = rsnd_io_is_play(io);
85
86 return rsnd_dma_request_channel(rsnd_src_of_node(priv),
87 SRC_NAME, mod,
88 is_play ? "rx" : "tx");
89 }
90
rsnd_src_convert_rate(struct rsnd_dai_stream * io,struct rsnd_mod * mod)91 static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io,
92 struct rsnd_mod *mod)
93 {
94 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
95 struct rsnd_src *src = rsnd_mod_to_src(mod);
96 u32 convert_rate;
97
98 if (!runtime)
99 return 0;
100
101 if (!rsnd_src_sync_is_enabled(mod))
102 return rsnd_io_converted_rate(io);
103
104 convert_rate = src->current_sync_rate;
105
106 if (!convert_rate)
107 convert_rate = rsnd_io_converted_rate(io);
108
109 if (!convert_rate)
110 convert_rate = runtime->rate;
111
112 return convert_rate;
113 }
114
rsnd_src_get_rate(struct rsnd_priv * priv,struct rsnd_dai_stream * io,int is_in)115 unsigned int rsnd_src_get_rate(struct rsnd_priv *priv,
116 struct rsnd_dai_stream *io,
117 int is_in)
118 {
119 struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
120 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
121 unsigned int rate = 0;
122 int is_play = rsnd_io_is_play(io);
123
124 /*
125 * Playback
126 * runtime_rate -> [SRC] -> convert_rate
127 *
128 * Capture
129 * convert_rate -> [SRC] -> runtime_rate
130 */
131
132 if (is_play == is_in)
133 return runtime->rate;
134
135 /*
136 * return convert rate if SRC is used,
137 * otherwise, return runtime->rate as usual
138 */
139 if (src_mod)
140 rate = rsnd_src_convert_rate(io, src_mod);
141
142 if (!rate)
143 rate = runtime->rate;
144
145 return rate;
146 }
147
148 static const u32 bsdsr_table_pattern1[] = {
149 0x01800000, /* 6 - 1/6 */
150 0x01000000, /* 6 - 1/4 */
151 0x00c00000, /* 6 - 1/3 */
152 0x00800000, /* 6 - 1/2 */
153 0x00600000, /* 6 - 2/3 */
154 0x00400000, /* 6 - 1 */
155 };
156
157 static const u32 bsdsr_table_pattern2[] = {
158 0x02400000, /* 6 - 1/6 */
159 0x01800000, /* 6 - 1/4 */
160 0x01200000, /* 6 - 1/3 */
161 0x00c00000, /* 6 - 1/2 */
162 0x00900000, /* 6 - 2/3 */
163 0x00600000, /* 6 - 1 */
164 };
165
166 static const u32 bsisr_table[] = {
167 0x00100060, /* 6 - 1/6 */
168 0x00100040, /* 6 - 1/4 */
169 0x00100030, /* 6 - 1/3 */
170 0x00100020, /* 6 - 1/2 */
171 0x00100020, /* 6 - 2/3 */
172 0x00100020, /* 6 - 1 */
173 };
174
175 static const u32 chan288888[] = {
176 0x00000006, /* 1 to 2 */
177 0x000001fe, /* 1 to 8 */
178 0x000001fe, /* 1 to 8 */
179 0x000001fe, /* 1 to 8 */
180 0x000001fe, /* 1 to 8 */
181 0x000001fe, /* 1 to 8 */
182 };
183
184 static const u32 chan244888[] = {
185 0x00000006, /* 1 to 2 */
186 0x0000001e, /* 1 to 4 */
187 0x0000001e, /* 1 to 4 */
188 0x000001fe, /* 1 to 8 */
189 0x000001fe, /* 1 to 8 */
190 0x000001fe, /* 1 to 8 */
191 };
192
193 static const u32 chan222222[] = {
194 0x00000006, /* 1 to 2 */
195 0x00000006, /* 1 to 2 */
196 0x00000006, /* 1 to 2 */
197 0x00000006, /* 1 to 2 */
198 0x00000006, /* 1 to 2 */
199 0x00000006, /* 1 to 2 */
200 };
201
rsnd_src_set_convert_rate(struct rsnd_dai_stream * io,struct rsnd_mod * mod)202 static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io,
203 struct rsnd_mod *mod)
204 {
205 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
206 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
207 struct rsnd_src *src = rsnd_mod_to_src(mod);
208 u32 fin, fout, new_rate;
209 int inc, cnt, rate;
210 u64 base, val;
211
212 if (!runtime)
213 return;
214
215 if (!rsnd_src_sync_is_enabled(mod))
216 return;
217
218 fin = rsnd_src_get_in_rate(priv, io);
219 fout = rsnd_src_get_out_rate(priv, io);
220
221 new_rate = src->sync.val;
222
223 if (!new_rate)
224 new_rate = fout;
225
226 /* Do nothing if no diff */
227 if (new_rate == src->current_sync_rate)
228 return;
229
230 /*
231 * SRCm_IFSVR::INTIFS can change within 1%
232 * see
233 * SRCm_IFSVR::INTIFS Note
234 */
235 inc = fout / 100;
236 cnt = abs(new_rate - fout) / inc;
237 if (fout > new_rate)
238 inc *= -1;
239
240 /*
241 * After start running SRC, we can update only SRC_IFSVR
242 * for Synchronous Mode
243 */
244 base = (u64)0x0400000 * fin;
245 rate = fout;
246 for (int i = 0; i < cnt; i++) {
247 val = base;
248 rate += inc;
249 do_div(val, rate);
250
251 rsnd_mod_write(mod, SRC_IFSVR, val);
252 }
253 val = base;
254 do_div(val, new_rate);
255
256 rsnd_mod_write(mod, SRC_IFSVR, val);
257
258 /* update current_sync_rate */
259 src->current_sync_rate = new_rate;
260 }
261
rsnd_src_init_convert_rate(struct rsnd_dai_stream * io,struct rsnd_mod * mod)262 static void rsnd_src_init_convert_rate(struct rsnd_dai_stream *io,
263 struct rsnd_mod *mod)
264 {
265 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
266 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
267 struct device *dev = rsnd_priv_to_dev(priv);
268 int is_play = rsnd_io_is_play(io);
269 int use_src = 0;
270 u32 fin, fout;
271 u32 ifscr, adinr;
272 u32 cr, route;
273 u32 i_busif, o_busif, tmp;
274 const u32 *bsdsr_table;
275 const u32 *chptn;
276 uint ratio;
277 int chan;
278 int idx;
279
280 if (!runtime)
281 return;
282
283 fin = rsnd_src_get_in_rate(priv, io);
284 fout = rsnd_src_get_out_rate(priv, io);
285
286 chan = rsnd_runtime_channel_original(io);
287
288 /* 6 - 1/6 are very enough ratio for SRC_BSDSR */
289 if (fin == fout)
290 ratio = 0;
291 else if (fin > fout)
292 ratio = 100 * fin / fout;
293 else
294 ratio = 100 * fout / fin;
295
296 if (ratio > 600) {
297 dev_err(dev, "FSO/FSI ratio error\n");
298 return;
299 }
300
301 use_src = (fin != fout) | rsnd_src_sync_is_enabled(mod);
302
303 /*
304 * SRC_ADINR
305 */
306 adinr = rsnd_get_adinr_bit(mod, io) | chan;
307
308 /*
309 * SRC_IFSCR
310 * SRC_SRCCR / SRC_ROUTE_MODE0
311 */
312 ifscr = 0;
313 cr = 0x00011110;
314 route = 0x0;
315 if (use_src) {
316 route = 0x1;
317 ifscr = 0x1;
318
319 if (rsnd_src_sync_is_enabled(mod)) {
320 cr |= 0x1;
321 route |= rsnd_io_is_play(io) ?
322 (0x1 << 24) : (0x1 << 25);
323 }
324 }
325
326 /*
327 * SRC_BSDSR / SRC_BSISR
328 *
329 * see
330 * Combination of Register Setting Related to
331 * FSO/FSI Ratio and Channel, Latency
332 */
333 switch (rsnd_mod_id(mod)) {
334 case 0:
335 chptn = chan288888;
336 bsdsr_table = bsdsr_table_pattern1;
337 break;
338 case 1:
339 case 3:
340 case 4:
341 chptn = chan244888;
342 bsdsr_table = bsdsr_table_pattern1;
343 break;
344 case 2:
345 case 9:
346 chptn = chan222222;
347 bsdsr_table = bsdsr_table_pattern1;
348 break;
349 case 5:
350 case 6:
351 case 7:
352 case 8:
353 chptn = chan222222;
354 bsdsr_table = bsdsr_table_pattern2;
355 break;
356 default:
357 goto convert_rate_err;
358 }
359
360 /*
361 * E3 need to overwrite
362 */
363 if (rsnd_is_gen3_e3(priv))
364 switch (rsnd_mod_id(mod)) {
365 case 0:
366 case 4:
367 chptn = chan222222;
368 }
369
370 for (idx = 0; idx < ARRAY_SIZE(chan222222); idx++)
371 if (chptn[idx] & (1 << chan))
372 break;
373
374 if (chan > 8 ||
375 idx >= ARRAY_SIZE(chan222222))
376 goto convert_rate_err;
377
378 /* BUSIF_MODE */
379 tmp = rsnd_get_busif_shift(io, mod);
380 i_busif = ( is_play ? tmp : 0) | 1;
381 o_busif = (!is_play ? tmp : 0) | 1;
382
383 rsnd_mod_write(mod, SRC_ROUTE_MODE0, route);
384
385 rsnd_mod_write(mod, SRC_SRCIR, 1); /* initialize */
386 rsnd_mod_write(mod, SRC_ADINR, adinr);
387 rsnd_mod_write(mod, SRC_IFSCR, ifscr);
388 rsnd_mod_write(mod, SRC_SRCCR, cr);
389 rsnd_mod_write(mod, SRC_BSDSR, bsdsr_table[idx]);
390 rsnd_mod_write(mod, SRC_BSISR, bsisr_table[idx]);
391 rsnd_mod_write(mod, SRC_SRCIR, 0); /* cancel initialize */
392
393 rsnd_mod_write(mod, SRC_I_BUSIF_MODE, i_busif);
394 rsnd_mod_write(mod, SRC_O_BUSIF_MODE, o_busif);
395
396 rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io));
397
398 rsnd_adg_set_src_timesel_gen2(mod, io, fin, fout);
399
400 /* update SRC_IFSVR */
401 rsnd_src_set_convert_rate(io, mod);
402
403 return;
404
405 convert_rate_err:
406 dev_err(dev, "unknown BSDSR/BSDIR settings\n");
407 }
408
rsnd_src_irq(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv,int enable)409 static int rsnd_src_irq(struct rsnd_mod *mod,
410 struct rsnd_dai_stream *io,
411 struct rsnd_priv *priv,
412 int enable)
413 {
414 struct rsnd_src *src = rsnd_mod_to_src(mod);
415 u32 sys_int_val, int_val, sys_int_mask;
416 int irq = src->irq;
417 int id = rsnd_mod_id(mod);
418
419 sys_int_val =
420 sys_int_mask = OUF_SRC(id);
421 int_val = 0x3300;
422
423 /*
424 * IRQ is not supported on non-DT
425 * see
426 * rsnd_src_probe_()
427 */
428 if ((irq <= 0) || !enable) {
429 sys_int_val = 0;
430 int_val = 0;
431 }
432
433 /*
434 * WORKAROUND
435 *
436 * ignore over flow error when rsnd_src_sync_is_enabled()
437 */
438 if (rsnd_src_sync_is_enabled(mod))
439 sys_int_val = sys_int_val & 0xffff;
440
441 rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val);
442 rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val);
443 rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val);
444
445 return 0;
446 }
447
rsnd_src_status_clear(struct rsnd_mod * mod)448 static void rsnd_src_status_clear(struct rsnd_mod *mod)
449 {
450 u32 val = OUF_SRC(rsnd_mod_id(mod));
451
452 rsnd_mod_write(mod, SCU_SYS_STATUS0, val);
453 rsnd_mod_write(mod, SCU_SYS_STATUS1, val);
454 }
455
rsnd_src_error_occurred(struct rsnd_mod * mod)456 static bool rsnd_src_error_occurred(struct rsnd_mod *mod)
457 {
458 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
459 struct device *dev = rsnd_priv_to_dev(priv);
460 u32 val0, val1;
461 u32 status0, status1;
462 bool ret = false;
463
464 val0 = val1 = OUF_SRC(rsnd_mod_id(mod));
465
466 /*
467 * WORKAROUND
468 *
469 * ignore over flow error when rsnd_src_sync_is_enabled()
470 */
471 if (rsnd_src_sync_is_enabled(mod))
472 val0 = val0 & 0xffff;
473
474 status0 = rsnd_mod_read(mod, SCU_SYS_STATUS0);
475 status1 = rsnd_mod_read(mod, SCU_SYS_STATUS1);
476 if ((status0 & val0) || (status1 & val1)) {
477 rsnd_print_irq_status(dev, "%s err status : 0x%08x, 0x%08x\n",
478 rsnd_mod_name(mod), status0, status1);
479
480 ret = true;
481 }
482
483 return ret;
484 }
485
rsnd_src_start(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)486 static int rsnd_src_start(struct rsnd_mod *mod,
487 struct rsnd_dai_stream *io,
488 struct rsnd_priv *priv)
489 {
490 u32 val;
491
492 /*
493 * WORKAROUND
494 *
495 * Enable SRC output if you want to use sync convert together with DVC
496 */
497 val = (rsnd_io_to_mod_dvc(io) && !rsnd_src_sync_is_enabled(mod)) ?
498 0x01 : 0x11;
499
500 rsnd_mod_write(mod, SRC_CTRL, val);
501
502 return 0;
503 }
504
rsnd_src_stop(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)505 static int rsnd_src_stop(struct rsnd_mod *mod,
506 struct rsnd_dai_stream *io,
507 struct rsnd_priv *priv)
508 {
509 rsnd_mod_write(mod, SRC_CTRL, 0);
510
511 return 0;
512 }
513
rsnd_src_init(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)514 static int rsnd_src_init(struct rsnd_mod *mod,
515 struct rsnd_dai_stream *io,
516 struct rsnd_priv *priv)
517 {
518 struct rsnd_src *src = rsnd_mod_to_src(mod);
519 int ret;
520
521 /* reset sync convert_rate */
522 src->sync.val =
523 src->current_sync_rate = 0;
524
525 ret = rsnd_mod_power_on(mod);
526 if (ret < 0)
527 return ret;
528
529 rsnd_src_activation(mod);
530
531 rsnd_src_init_convert_rate(io, mod);
532
533 rsnd_src_status_clear(mod);
534
535 return 0;
536 }
537
rsnd_src_quit(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)538 static int rsnd_src_quit(struct rsnd_mod *mod,
539 struct rsnd_dai_stream *io,
540 struct rsnd_priv *priv)
541 {
542 struct rsnd_src *src = rsnd_mod_to_src(mod);
543
544 rsnd_src_halt(mod);
545
546 rsnd_mod_power_off(mod);
547
548 /* reset sync convert_rate */
549 src->sync.val =
550 src->current_sync_rate = 0;
551
552 return 0;
553 }
554
__rsnd_src_interrupt(struct rsnd_mod * mod,struct rsnd_dai_stream * io)555 static void __rsnd_src_interrupt(struct rsnd_mod *mod,
556 struct rsnd_dai_stream *io)
557 {
558 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
559 bool stop = false;
560
561 spin_lock(&priv->lock);
562
563 /* ignore all cases if not working */
564 if (!rsnd_io_is_working(io))
565 goto rsnd_src_interrupt_out;
566
567 if (rsnd_src_error_occurred(mod))
568 stop = true;
569
570 rsnd_src_status_clear(mod);
571 rsnd_src_interrupt_out:
572
573 spin_unlock(&priv->lock);
574
575 if (stop)
576 snd_pcm_stop_xrun(io->substream);
577 }
578
rsnd_src_interrupt(int irq,void * data)579 static irqreturn_t rsnd_src_interrupt(int irq, void *data)
580 {
581 struct rsnd_mod *mod = data;
582
583 rsnd_mod_interrupt(mod, __rsnd_src_interrupt);
584
585 return IRQ_HANDLED;
586 }
587
rsnd_src_kctrl_accept_runtime(struct rsnd_dai_stream * io)588 static int rsnd_src_kctrl_accept_runtime(struct rsnd_dai_stream *io)
589 {
590 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
591
592 if (!runtime) {
593 struct rsnd_priv *priv = rsnd_io_to_priv(io);
594 struct device *dev = rsnd_priv_to_dev(priv);
595
596 dev_warn(dev, "\"SRC Out Rate\" can use during running\n");
597
598 return 0;
599 }
600
601 return 1;
602 }
603
rsnd_src_probe_(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)604 static int rsnd_src_probe_(struct rsnd_mod *mod,
605 struct rsnd_dai_stream *io,
606 struct rsnd_priv *priv)
607 {
608 struct rsnd_src *src = rsnd_mod_to_src(mod);
609 struct device *dev = rsnd_priv_to_dev(priv);
610 int irq = src->irq;
611 int ret;
612
613 if (irq > 0) {
614 /*
615 * IRQ is not supported on non-DT
616 * see
617 * rsnd_src_irq()
618 */
619 ret = devm_request_irq(dev, irq,
620 rsnd_src_interrupt,
621 IRQF_SHARED,
622 dev_name(dev), mod);
623 if (ret)
624 return ret;
625 }
626
627 ret = rsnd_dma_attach(io, mod, &src->dma);
628
629 return ret;
630 }
631
rsnd_src_pcm_new(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct snd_soc_pcm_runtime * rtd)632 static int rsnd_src_pcm_new(struct rsnd_mod *mod,
633 struct rsnd_dai_stream *io,
634 struct snd_soc_pcm_runtime *rtd)
635 {
636 struct rsnd_src *src = rsnd_mod_to_src(mod);
637 int ret;
638
639 /*
640 * enable SRC sync convert if possible
641 */
642
643 /*
644 * It can't use SRC Synchronous convert
645 * when Capture if it uses CMD
646 */
647 if (rsnd_io_to_mod_cmd(io) && !rsnd_io_is_play(io))
648 return 0;
649
650 /*
651 * enable sync convert
652 */
653 ret = rsnd_kctrl_new_s(mod, io, rtd,
654 rsnd_io_is_play(io) ?
655 "SRC Out Rate Switch" :
656 "SRC In Rate Switch",
657 rsnd_kctrl_accept_anytime,
658 rsnd_src_init_convert_rate,
659 &src->sen, 1);
660 if (ret < 0)
661 return ret;
662
663 ret = rsnd_kctrl_new_s(mod, io, rtd,
664 rsnd_io_is_play(io) ?
665 "SRC Out Rate" :
666 "SRC In Rate",
667 rsnd_src_kctrl_accept_runtime,
668 rsnd_src_set_convert_rate,
669 &src->sync, 192000);
670
671 return ret;
672 }
673
674 #ifdef CONFIG_DEBUG_FS
rsnd_src_debug_info(struct seq_file * m,struct rsnd_dai_stream * io,struct rsnd_mod * mod)675 static void rsnd_src_debug_info(struct seq_file *m,
676 struct rsnd_dai_stream *io,
677 struct rsnd_mod *mod)
678 {
679 rsnd_debugfs_mod_reg_show(m, mod, RSND_BASE_SCU,
680 rsnd_mod_id(mod) * 0x20, 0x20);
681 seq_puts(m, "\n");
682 rsnd_debugfs_mod_reg_show(m, mod, RSND_BASE_SCU,
683 0x1c0, 0x20);
684 seq_puts(m, "\n");
685 rsnd_debugfs_mod_reg_show(m, mod, RSND_BASE_SCU,
686 0x200 + rsnd_mod_id(mod) * 0x40, 0x40);
687 }
688 #define DEBUG_INFO .debug_info = rsnd_src_debug_info
689 #else
690 #define DEBUG_INFO
691 #endif
692
693 static struct rsnd_mod_ops rsnd_src_ops = {
694 .name = SRC_NAME,
695 .dma_req = rsnd_src_dma_req,
696 .probe = rsnd_src_probe_,
697 .init = rsnd_src_init,
698 .quit = rsnd_src_quit,
699 .start = rsnd_src_start,
700 .stop = rsnd_src_stop,
701 .irq = rsnd_src_irq,
702 .pcm_new = rsnd_src_pcm_new,
703 .get_status = rsnd_mod_get_status,
704 DEBUG_INFO
705 };
706
rsnd_src_mod_get(struct rsnd_priv * priv,int id)707 struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)
708 {
709 if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv)))
710 id = 0;
711
712 return rsnd_mod_get(rsnd_src_get(priv, id));
713 }
714
rsnd_src_probe(struct rsnd_priv * priv)715 int rsnd_src_probe(struct rsnd_priv *priv)
716 {
717 struct device_node *node;
718 struct device_node *np;
719 struct device *dev = rsnd_priv_to_dev(priv);
720 struct rsnd_src *src;
721 struct clk *clk;
722 char name[RSND_SRC_NAME_SIZE];
723 int i, nr, ret;
724
725 node = rsnd_src_of_node(priv);
726 if (!node)
727 return 0; /* not used is not error */
728
729 nr = rsnd_node_count(priv, node, SRC_NAME);
730 if (!nr) {
731 ret = -EINVAL;
732 goto rsnd_src_probe_done;
733 }
734
735 src = devm_kcalloc(dev, nr, sizeof(*src), GFP_KERNEL);
736 if (!src) {
737 ret = -ENOMEM;
738 goto rsnd_src_probe_done;
739 }
740
741 priv->src_nr = nr;
742 priv->src = src;
743
744 i = 0;
745 for_each_child_of_node(node, np) {
746 if (!of_device_is_available(np))
747 goto skip;
748
749 i = rsnd_node_fixed_index(dev, np, SRC_NAME, i);
750 if (i < 0) {
751 ret = -EINVAL;
752 of_node_put(np);
753 goto rsnd_src_probe_done;
754 }
755
756 src = rsnd_src_get(priv, i);
757
758 snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d",
759 SRC_NAME, i);
760
761 src->irq = irq_of_parse_and_map(np, 0);
762 if (!src->irq) {
763 ret = -EINVAL;
764 of_node_put(np);
765 goto rsnd_src_probe_done;
766 }
767
768 clk = devm_clk_get(dev, name);
769 if (IS_ERR(clk)) {
770 ret = PTR_ERR(clk);
771 of_node_put(np);
772 goto rsnd_src_probe_done;
773 }
774
775 ret = rsnd_mod_init(priv, rsnd_mod_get(src),
776 &rsnd_src_ops, clk, RSND_MOD_SRC, i);
777 if (ret) {
778 of_node_put(np);
779 goto rsnd_src_probe_done;
780 }
781
782 skip:
783 i++;
784 }
785
786 ret = 0;
787
788 rsnd_src_probe_done:
789 of_node_put(node);
790
791 return ret;
792 }
793
rsnd_src_remove(struct rsnd_priv * priv)794 void rsnd_src_remove(struct rsnd_priv *priv)
795 {
796 struct rsnd_src *src;
797 int i;
798
799 for_each_rsnd_src(src, priv, i) {
800 rsnd_mod_quit(rsnd_mod_get(src));
801 }
802 }
803