~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/soc/sh/rcar/src.c

Version: ~ [ linux-6.11-rc3 ] ~ [ linux-6.10.4 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.45 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.104 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.164 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.223 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.281 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.319 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

sflogo.php