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8#include <linux/kernel.h>
9#include <linux/init.h>
10#include <linux/dma-mapping.h>
11#include <linux/pci.h>
12#include <linux/delay.h>
13#include <sound/core.h>
14#include <sound/pcm.h>
15#include "lola.h"
16
17#define LOLA_MAX_BDL_ENTRIES 8
18#define LOLA_MAX_BUF_SIZE (1024*1024*1024)
19#define LOLA_BDL_ENTRY_SIZE (16 * 16)
20
21static struct lola_pcm *lola_get_pcm(struct snd_pcm_substream *substream)
22{
23 struct lola *chip = snd_pcm_substream_chip(substream);
24 return &chip->pcm[substream->stream];
25}
26
27static struct lola_stream *lola_get_stream(struct snd_pcm_substream *substream)
28{
29 struct lola_pcm *pcm = lola_get_pcm(substream);
30 unsigned int idx = substream->number;
31 return &pcm->streams[idx];
32}
33
34static unsigned int lola_get_lrc(struct lola *chip)
35{
36 return lola_readl(chip, BAR1, LRC);
37}
38
39static unsigned int lola_get_tstamp(struct lola *chip, bool quick_no_sync)
40{
41 unsigned int tstamp = lola_get_lrc(chip) >> 8;
42 if (chip->granularity) {
43 unsigned int wait_banks = quick_no_sync ? 0 : 8;
44 tstamp += (wait_banks + 1) * chip->granularity - 1;
45 tstamp -= tstamp % chip->granularity;
46 }
47 return tstamp << 8;
48}
49
50
51static void lola_stream_clear_pending_irq(struct lola *chip,
52 struct lola_stream *str)
53{
54 unsigned int val = lola_dsd_read(chip, str->dsd, STS);
55 val &= LOLA_DSD_STS_DESE | LOLA_DSD_STS_BCIS;
56 if (val)
57 lola_dsd_write(chip, str->dsd, STS, val);
58}
59
60static void lola_stream_start(struct lola *chip, struct lola_stream *str,
61 unsigned int tstamp)
62{
63 lola_stream_clear_pending_irq(chip, str);
64 lola_dsd_write(chip, str->dsd, CTL,
65 LOLA_DSD_CTL_SRUN |
66 LOLA_DSD_CTL_IOCE |
67 LOLA_DSD_CTL_DEIE |
68 LOLA_DSD_CTL_VLRCV |
69 tstamp);
70}
71
72static void lola_stream_stop(struct lola *chip, struct lola_stream *str,
73 unsigned int tstamp)
74{
75 lola_dsd_write(chip, str->dsd, CTL,
76 LOLA_DSD_CTL_IOCE |
77 LOLA_DSD_CTL_DEIE |
78 LOLA_DSD_CTL_VLRCV |
79 tstamp);
80 lola_stream_clear_pending_irq(chip, str);
81}
82
83static void wait_for_srst_clear(struct lola *chip, struct lola_stream *str)
84{
85 unsigned long end_time = jiffies + msecs_to_jiffies(200);
86 while (time_before(jiffies, end_time)) {
87 unsigned int val;
88 val = lola_dsd_read(chip, str->dsd, CTL);
89 if (!(val & LOLA_DSD_CTL_SRST))
90 return;
91 msleep(1);
92 }
93 dev_warn(chip->card->dev, "SRST not clear (stream %d)\n", str->dsd);
94}
95
96static int lola_stream_wait_for_fifo(struct lola *chip,
97 struct lola_stream *str,
98 bool ready)
99{
100 unsigned int val = ready ? LOLA_DSD_STS_FIFORDY : 0;
101 unsigned long end_time = jiffies + msecs_to_jiffies(200);
102 while (time_before(jiffies, end_time)) {
103 unsigned int reg = lola_dsd_read(chip, str->dsd, STS);
104 if ((reg & LOLA_DSD_STS_FIFORDY) == val)
105 return 0;
106 msleep(1);
107 }
108 dev_warn(chip->card->dev, "FIFO not ready (stream %d)\n", str->dsd);
109 return -EIO;
110}
111
112
113
114
115static int lola_sync_wait_for_fifo(struct lola *chip,
116 struct snd_pcm_substream *substream,
117 bool ready)
118{
119 unsigned int val = ready ? LOLA_DSD_STS_FIFORDY : 0;
120 unsigned long end_time = jiffies + msecs_to_jiffies(200);
121 struct snd_pcm_substream *s;
122 int pending = 0;
123
124 while (time_before(jiffies, end_time)) {
125 pending = 0;
126 snd_pcm_group_for_each_entry(s, substream) {
127 struct lola_stream *str;
128 if (s->pcm->card != substream->pcm->card)
129 continue;
130 str = lola_get_stream(s);
131 if (str->prepared && str->paused) {
132 unsigned int reg;
133 reg = lola_dsd_read(chip, str->dsd, STS);
134 if ((reg & LOLA_DSD_STS_FIFORDY) != val) {
135 pending = str->dsd + 1;
136 break;
137 }
138 if (ready)
139 str->paused = 0;
140 }
141 }
142 if (!pending)
143 return 0;
144 msleep(1);
145 }
146 dev_warn(chip->card->dev, "FIFO not ready (pending %d)\n", pending - 1);
147 return -EIO;
148}
149
150
151static void lola_sync_pause(struct lola *chip,
152 struct snd_pcm_substream *substream)
153{
154 struct snd_pcm_substream *s;
155
156 lola_sync_wait_for_fifo(chip, substream, false);
157 snd_pcm_group_for_each_entry(s, substream) {
158 struct lola_stream *str;
159 if (s->pcm->card != substream->pcm->card)
160 continue;
161 str = lola_get_stream(s);
162 if (str->paused && str->prepared)
163 lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_SRUN |
164 LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE);
165 }
166 lola_sync_wait_for_fifo(chip, substream, true);
167}
168
169static void lola_stream_reset(struct lola *chip, struct lola_stream *str)
170{
171 if (str->prepared) {
172 if (str->paused)
173 lola_sync_pause(chip, str->substream);
174 str->prepared = 0;
175 lola_dsd_write(chip, str->dsd, CTL,
176 LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE);
177 lola_stream_wait_for_fifo(chip, str, false);
178 lola_stream_clear_pending_irq(chip, str);
179 lola_dsd_write(chip, str->dsd, CTL, LOLA_DSD_CTL_SRST);
180 lola_dsd_write(chip, str->dsd, LVI, 0);
181 lola_dsd_write(chip, str->dsd, BDPU, 0);
182 lola_dsd_write(chip, str->dsd, BDPL, 0);
183 wait_for_srst_clear(chip, str);
184 }
185}
186
187static const struct snd_pcm_hardware lola_pcm_hw = {
188 .info = (SNDRV_PCM_INFO_MMAP |
189 SNDRV_PCM_INFO_INTERLEAVED |
190 SNDRV_PCM_INFO_BLOCK_TRANSFER |
191 SNDRV_PCM_INFO_MMAP_VALID |
192 SNDRV_PCM_INFO_PAUSE),
193 .formats = (SNDRV_PCM_FMTBIT_S16_LE |
194 SNDRV_PCM_FMTBIT_S24_LE |
195 SNDRV_PCM_FMTBIT_S32_LE |
196 SNDRV_PCM_FMTBIT_FLOAT_LE),
197 .rates = SNDRV_PCM_RATE_8000_192000,
198 .rate_min = 8000,
199 .rate_max = 192000,
200 .channels_min = 1,
201 .channels_max = 2,
202 .buffer_bytes_max = LOLA_MAX_BUF_SIZE,
203 .period_bytes_min = 128,
204 .period_bytes_max = LOLA_MAX_BUF_SIZE / 2,
205 .periods_min = 2,
206 .periods_max = LOLA_MAX_BDL_ENTRIES,
207 .fifo_size = 0,
208};
209
210static int lola_pcm_open(struct snd_pcm_substream *substream)
211{
212 struct lola *chip = snd_pcm_substream_chip(substream);
213 struct lola_pcm *pcm = lola_get_pcm(substream);
214 struct lola_stream *str = lola_get_stream(substream);
215 struct snd_pcm_runtime *runtime = substream->runtime;
216
217 mutex_lock(&chip->open_mutex);
218 if (str->opened) {
219 mutex_unlock(&chip->open_mutex);
220 return -EBUSY;
221 }
222 str->substream = substream;
223 str->master = NULL;
224 str->opened = 1;
225 runtime->hw = lola_pcm_hw;
226 runtime->hw.channels_max = pcm->num_streams - str->index;
227 if (chip->sample_rate) {
228
229 runtime->hw.rate_min = chip->sample_rate;
230 runtime->hw.rate_max = chip->sample_rate;
231 } else {
232 runtime->hw.rate_min = chip->sample_rate_min;
233 runtime->hw.rate_max = chip->sample_rate_max;
234 }
235 chip->ref_count_rate++;
236 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
237
238 snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
239 chip->granularity);
240 snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
241 chip->granularity);
242 mutex_unlock(&chip->open_mutex);
243 return 0;
244}
245
246static void lola_cleanup_slave_streams(struct lola_pcm *pcm,
247 struct lola_stream *str)
248{
249 int i;
250 for (i = str->index + 1; i < pcm->num_streams; i++) {
251 struct lola_stream *s = &pcm->streams[i];
252 if (s->master != str)
253 break;
254 s->master = NULL;
255 s->opened = 0;
256 }
257}
258
259static int lola_pcm_close(struct snd_pcm_substream *substream)
260{
261 struct lola *chip = snd_pcm_substream_chip(substream);
262 struct lola_stream *str = lola_get_stream(substream);
263
264 mutex_lock(&chip->open_mutex);
265 if (str->substream == substream) {
266 str->substream = NULL;
267 str->opened = 0;
268 }
269 if (--chip->ref_count_rate == 0) {
270
271 chip->sample_rate = 0;
272 }
273 mutex_unlock(&chip->open_mutex);
274 return 0;
275}
276
277static int lola_pcm_hw_params(struct snd_pcm_substream *substream,
278 struct snd_pcm_hw_params *hw_params)
279{
280 struct lola_stream *str = lola_get_stream(substream);
281
282 str->bufsize = 0;
283 str->period_bytes = 0;
284 str->format_verb = 0;
285 return 0;
286}
287
288static int lola_pcm_hw_free(struct snd_pcm_substream *substream)
289{
290 struct lola *chip = snd_pcm_substream_chip(substream);
291 struct lola_pcm *pcm = lola_get_pcm(substream);
292 struct lola_stream *str = lola_get_stream(substream);
293
294 mutex_lock(&chip->open_mutex);
295 lola_stream_reset(chip, str);
296 lola_cleanup_slave_streams(pcm, str);
297 mutex_unlock(&chip->open_mutex);
298 return 0;
299}
300
301
302
303
304static int setup_bdle(struct snd_pcm_substream *substream,
305 struct lola_stream *str, __le32 **bdlp,
306 int ofs, int size)
307{
308 __le32 *bdl = *bdlp;
309
310 while (size > 0) {
311 dma_addr_t addr;
312 int chunk;
313
314 if (str->frags >= LOLA_MAX_BDL_ENTRIES)
315 return -EINVAL;
316
317 addr = snd_pcm_sgbuf_get_addr(substream, ofs);
318
319 bdl[0] = cpu_to_le32((u32)addr);
320 bdl[1] = cpu_to_le32(upper_32_bits(addr));
321
322 chunk = snd_pcm_sgbuf_get_chunk_size(substream, ofs, size);
323 bdl[2] = cpu_to_le32(chunk);
324
325
326
327 size -= chunk;
328 bdl[3] = size ? 0 : cpu_to_le32(0x01);
329 bdl += 4;
330 str->frags++;
331 ofs += chunk;
332 }
333 *bdlp = bdl;
334 return ofs;
335}
336
337
338
339
340static int lola_setup_periods(struct lola *chip, struct lola_pcm *pcm,
341 struct snd_pcm_substream *substream,
342 struct lola_stream *str)
343{
344 __le32 *bdl;
345 int i, ofs, periods, period_bytes;
346
347 period_bytes = str->period_bytes;
348 periods = str->bufsize / period_bytes;
349
350
351 bdl = (__le32 *)(pcm->bdl.area + LOLA_BDL_ENTRY_SIZE * str->index);
352 ofs = 0;
353 str->frags = 0;
354 for (i = 0; i < periods; i++) {
355 ofs = setup_bdle(substream, str, &bdl, ofs, period_bytes);
356 if (ofs < 0)
357 goto error;
358 }
359 return 0;
360
361 error:
362 dev_err(chip->card->dev, "Too many BDL entries: buffer=%d, period=%d\n",
363 str->bufsize, period_bytes);
364 return -EINVAL;
365}
366
367static unsigned int lola_get_format_verb(struct snd_pcm_substream *substream)
368{
369 unsigned int verb;
370
371 switch (substream->runtime->format) {
372 case SNDRV_PCM_FORMAT_S16_LE:
373 verb = 0x00000000;
374 break;
375 case SNDRV_PCM_FORMAT_S24_LE:
376 verb = 0x00000200;
377 break;
378 case SNDRV_PCM_FORMAT_S32_LE:
379 verb = 0x00000300;
380 break;
381 case SNDRV_PCM_FORMAT_FLOAT_LE:
382 verb = 0x00001300;
383 break;
384 default:
385 return 0;
386 }
387 verb |= substream->runtime->channels;
388 return verb;
389}
390
391static int lola_set_stream_config(struct lola *chip,
392 struct lola_stream *str,
393 int channels)
394{
395 int i, err;
396 unsigned int verb, val;
397
398
399
400
401 err = lola_codec_read(chip, str->nid, LOLA_VERB_SET_STREAM_FORMAT,
402 str->format_verb, 0, &val, NULL);
403 if (err < 0) {
404 dev_err(chip->card->dev, "Cannot set stream format 0x%x\n",
405 str->format_verb);
406 return err;
407 }
408
409
410 for (i = 0; i < channels; i++) {
411 verb = (str->index << 6) | i;
412 err = lola_codec_read(chip, str[i].nid,
413 LOLA_VERB_SET_CHANNEL_STREAMID, 0, verb,
414 &val, NULL);
415 if (err < 0) {
416 dev_err(chip->card->dev,
417 "Cannot set stream channel %d\n", i);
418 return err;
419 }
420 }
421 return 0;
422}
423
424
425
426
427static int lola_setup_controller(struct lola *chip, struct lola_pcm *pcm,
428 struct lola_stream *str)
429{
430 dma_addr_t bdl;
431
432 if (str->prepared)
433 return -EINVAL;
434
435
436 bdl = pcm->bdl.addr + LOLA_BDL_ENTRY_SIZE * str->index;
437 lola_dsd_write(chip, str->dsd, BDPL, (u32)bdl);
438 lola_dsd_write(chip, str->dsd, BDPU, upper_32_bits(bdl));
439
440 lola_dsd_write(chip, str->dsd, LVI, str->frags - 1);
441 lola_stream_clear_pending_irq(chip, str);
442
443 lola_dsd_write(chip, str->dsd, CTL,
444 LOLA_DSD_CTL_IOCE | LOLA_DSD_CTL_DEIE | LOLA_DSD_CTL_SRUN);
445
446 str->prepared = 1;
447
448 return lola_stream_wait_for_fifo(chip, str, true);
449}
450
451static int lola_pcm_prepare(struct snd_pcm_substream *substream)
452{
453 struct lola *chip = snd_pcm_substream_chip(substream);
454 struct lola_pcm *pcm = lola_get_pcm(substream);
455 struct lola_stream *str = lola_get_stream(substream);
456 struct snd_pcm_runtime *runtime = substream->runtime;
457 unsigned int bufsize, period_bytes, format_verb;
458 int i, err;
459
460 mutex_lock(&chip->open_mutex);
461 lola_stream_reset(chip, str);
462 lola_cleanup_slave_streams(pcm, str);
463 if (str->index + runtime->channels > pcm->num_streams) {
464 mutex_unlock(&chip->open_mutex);
465 return -EINVAL;
466 }
467 for (i = 1; i < runtime->channels; i++) {
468 str[i].master = str;
469 str[i].opened = 1;
470 }
471 mutex_unlock(&chip->open_mutex);
472
473 bufsize = snd_pcm_lib_buffer_bytes(substream);
474 period_bytes = snd_pcm_lib_period_bytes(substream);
475 format_verb = lola_get_format_verb(substream);
476
477 str->bufsize = bufsize;
478 str->period_bytes = period_bytes;
479 str->format_verb = format_verb;
480
481 err = lola_setup_periods(chip, pcm, substream, str);
482 if (err < 0)
483 return err;
484
485 err = lola_set_sample_rate(chip, runtime->rate);
486 if (err < 0)
487 return err;
488 chip->sample_rate = runtime->rate;
489
490 err = lola_set_stream_config(chip, str, runtime->channels);
491 if (err < 0)
492 return err;
493
494 err = lola_setup_controller(chip, pcm, str);
495 if (err < 0) {
496 lola_stream_reset(chip, str);
497 return err;
498 }
499
500 return 0;
501}
502
503static int lola_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
504{
505 struct lola *chip = snd_pcm_substream_chip(substream);
506 struct lola_stream *str;
507 struct snd_pcm_substream *s;
508 unsigned int start;
509 unsigned int tstamp;
510 bool sync_streams;
511
512 switch (cmd) {
513 case SNDRV_PCM_TRIGGER_START:
514 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
515 case SNDRV_PCM_TRIGGER_RESUME:
516 start = 1;
517 break;
518 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
519 case SNDRV_PCM_TRIGGER_SUSPEND:
520 case SNDRV_PCM_TRIGGER_STOP:
521 start = 0;
522 break;
523 default:
524 return -EINVAL;
525 }
526
527
528
529
530
531 sync_streams = (start && snd_pcm_stream_linked(substream));
532 tstamp = lola_get_tstamp(chip, !sync_streams);
533 spin_lock(&chip->reg_lock);
534 snd_pcm_group_for_each_entry(s, substream) {
535 if (s->pcm->card != substream->pcm->card)
536 continue;
537 str = lola_get_stream(s);
538 if (start)
539 lola_stream_start(chip, str, tstamp);
540 else
541 lola_stream_stop(chip, str, tstamp);
542 str->running = start;
543 str->paused = !start;
544 snd_pcm_trigger_done(s, substream);
545 }
546 spin_unlock(&chip->reg_lock);
547 return 0;
548}
549
550static snd_pcm_uframes_t lola_pcm_pointer(struct snd_pcm_substream *substream)
551{
552 struct lola *chip = snd_pcm_substream_chip(substream);
553 struct lola_stream *str = lola_get_stream(substream);
554 unsigned int pos = lola_dsd_read(chip, str->dsd, LPIB);
555
556 if (pos >= str->bufsize)
557 pos = 0;
558 return bytes_to_frames(substream->runtime, pos);
559}
560
561void lola_pcm_update(struct lola *chip, struct lola_pcm *pcm, unsigned int bits)
562{
563 int i;
564
565 for (i = 0; bits && i < pcm->num_streams; i++) {
566 if (bits & (1 << i)) {
567 struct lola_stream *str = &pcm->streams[i];
568 if (str->substream && str->running)
569 snd_pcm_period_elapsed(str->substream);
570 bits &= ~(1 << i);
571 }
572 }
573}
574
575static const struct snd_pcm_ops lola_pcm_ops = {
576 .open = lola_pcm_open,
577 .close = lola_pcm_close,
578 .hw_params = lola_pcm_hw_params,
579 .hw_free = lola_pcm_hw_free,
580 .prepare = lola_pcm_prepare,
581 .trigger = lola_pcm_trigger,
582 .pointer = lola_pcm_pointer,
583};
584
585int lola_create_pcm(struct lola *chip)
586{
587 struct snd_pcm *pcm;
588 int i, err;
589
590 for (i = 0; i < 2; i++) {
591 err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
592 &chip->pci->dev,
593 PAGE_SIZE, &chip->pcm[i].bdl);
594 if (err < 0)
595 return err;
596 }
597
598 err = snd_pcm_new(chip->card, "Digigram Lola", 0,
599 chip->pcm[SNDRV_PCM_STREAM_PLAYBACK].num_streams,
600 chip->pcm[SNDRV_PCM_STREAM_CAPTURE].num_streams,
601 &pcm);
602 if (err < 0)
603 return err;
604 strlcpy(pcm->name, "Digigram Lola", sizeof(pcm->name));
605 pcm->private_data = chip;
606 for (i = 0; i < 2; i++) {
607 if (chip->pcm[i].num_streams)
608 snd_pcm_set_ops(pcm, i, &lola_pcm_ops);
609 }
610
611 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
612 &chip->pci->dev,
613 1024 * 64, 32 * 1024 * 1024);
614 return 0;
615}
616
617void lola_free_pcm(struct lola *chip)
618{
619 snd_dma_free_pages(&chip->pcm[0].bdl);
620 snd_dma_free_pages(&chip->pcm[1].bdl);
621}
622
623
624
625
626static int lola_init_stream(struct lola *chip, struct lola_stream *str,
627 int idx, int nid, int dir)
628{
629 unsigned int val;
630 int err;
631
632 str->nid = nid;
633 str->index = idx;
634 str->dsd = idx;
635 if (dir == PLAY)
636 str->dsd += MAX_STREAM_IN_COUNT;
637 err = lola_read_param(chip, nid, LOLA_PAR_AUDIO_WIDGET_CAP, &val);
638 if (err < 0) {
639 dev_err(chip->card->dev, "Can't read wcaps for 0x%x\n", nid);
640 return err;
641 }
642 if (dir == PLAY) {
643
644 if ((val & 0x00f00dff) != 0x00000010) {
645 dev_err(chip->card->dev,
646 "Invalid wcaps 0x%x for 0x%x\n",
647 val, nid);
648 return -EINVAL;
649 }
650 } else {
651
652
653
654 if ((val & 0x00f00cff) != 0x00100010) {
655 dev_err(chip->card->dev,
656 "Invalid wcaps 0x%x for 0x%x\n",
657 val, nid);
658 return -EINVAL;
659 }
660
661 if ((val & 0x00001200) == 0x00001200)
662 chip->input_src_caps_mask |= (1 << idx);
663 }
664
665 err = lola_read_param(chip, nid, LOLA_PAR_STREAM_FORMATS, &val);
666 if (err < 0) {
667 dev_err(chip->card->dev, "Can't read FORMATS 0x%x\n", nid);
668 return err;
669 }
670 val &= 3;
671 if (val == 3)
672 str->can_float = true;
673 if (!(val & 1)) {
674 dev_err(chip->card->dev,
675 "Invalid formats 0x%x for 0x%x", val, nid);
676 return -EINVAL;
677 }
678 return 0;
679}
680
681int lola_init_pcm(struct lola *chip, int dir, int *nidp)
682{
683 struct lola_pcm *pcm = &chip->pcm[dir];
684 int i, nid, err;
685
686 nid = *nidp;
687 for (i = 0; i < pcm->num_streams; i++, nid++) {
688 err = lola_init_stream(chip, &pcm->streams[i], i, nid, dir);
689 if (err < 0)
690 return err;
691 }
692 *nidp = nid;
693 return 0;
694}
695
