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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 * Uros Bizjak <uros@kss-loka.si>
5 *
6 * Routines for control of 8-bit SoundBlaster cards and clones
7 * Please note: I don't have access to old SB8 soundcards.
8 *
9 * --
10 *
11 * Thu Apr 29 20:36:17 BST 1999 George David Morrison <gdm@gedamo.demon.co.uk>
12 * DSP can't respond to commands whilst in "high speed" mode. Caused
13 * glitching during playback. Fixed.
14 *
15 * Wed Jul 12 22:02:55 CEST 2000 Uros Bizjak <uros@kss-loka.si>
16 * Cleaned up and rewrote lowlevel routines.
17 */
18
19#include <linux/io.h>
20#include <asm/dma.h>
21#include <linux/init.h>
22#include <linux/time.h>
23#include <linux/module.h>
24#include <sound/core.h>
25#include <sound/sb.h>
26
27MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Uros Bizjak <uros@kss-loka.si>");
28MODULE_DESCRIPTION("Routines for control of 8-bit SoundBlaster cards and clones");
29MODULE_LICENSE("GPL");
30
31#define SB8_CLOCK 1000000
32#define SB8_DEN(v) ((SB8_CLOCK + (v) / 2) / (v))
33#define SB8_RATE(v) (SB8_CLOCK / SB8_DEN(v))
34
35static const struct snd_ratnum clock = {
36 .num = SB8_CLOCK,
37 .den_min = 1,
38 .den_max = 256,
39 .den_step = 1,
40};
41
42static const struct snd_pcm_hw_constraint_ratnums hw_constraints_clock = {
43 .nrats = 1,
44 .rats = &clock,
45};
46
47static const struct snd_ratnum stereo_clocks[] = {
48 {
49 .num = SB8_CLOCK,
50 .den_min = SB8_DEN(22050),
51 .den_max = SB8_DEN(22050),
52 .den_step = 1,
53 },
54 {
55 .num = SB8_CLOCK,
56 .den_min = SB8_DEN(11025),
57 .den_max = SB8_DEN(11025),
58 .den_step = 1,
59 }
60};
61
62static int snd_sb8_hw_constraint_rate_channels(struct snd_pcm_hw_params *params,
63 struct snd_pcm_hw_rule *rule)
64{
65 struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
66 if (c->min > 1) {
67 unsigned int num = 0, den = 0;
68 int err = snd_interval_ratnum(hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE),
69 2, stereo_clocks, &num, &den);
70 if (err >= 0 && den) {
71 params->rate_num = num;
72 params->rate_den = den;
73 }
74 return err;
75 }
76 return 0;
77}
78
79static int snd_sb8_hw_constraint_channels_rate(struct snd_pcm_hw_params *params,
80 struct snd_pcm_hw_rule *rule)
81{
82 struct snd_interval *r = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
83 if (r->min > SB8_RATE(22050) || r->max <= SB8_RATE(11025)) {
84 struct snd_interval t = { .min = 1, .max = 1 };
85 return snd_interval_refine(hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS), &t);
86 }
87 return 0;
88}
89
90static int snd_sb8_playback_prepare(struct snd_pcm_substream *substream)
91{
92 unsigned long flags;
93 struct snd_sb *chip = snd_pcm_substream_chip(substream);
94 struct snd_pcm_runtime *runtime = substream->runtime;
95 unsigned int mixreg, rate, size, count;
96 unsigned char format;
97 unsigned char stereo = runtime->channels > 1;
98 int dma;
99
100 rate = runtime->rate;
101 switch (chip->hardware) {
102 case SB_HW_JAZZ16:
103 if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) {
104 if (chip->mode & SB_MODE_CAPTURE_16)
105 return -EBUSY;
106 else
107 chip->mode |= SB_MODE_PLAYBACK_16;
108 }
109 chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
110 break;
111 case SB_HW_PRO:
112 if (runtime->channels > 1) {
113 if (snd_BUG_ON(rate != SB8_RATE(11025) &&
114 rate != SB8_RATE(22050)))
115 return -EINVAL;
116 chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
117 break;
118 }
119 fallthrough;
120 case SB_HW_201:
121 if (rate > 23000) {
122 chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
123 break;
124 }
125 fallthrough;
126 case SB_HW_20:
127 chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
128 break;
129 case SB_HW_10:
130 chip->playback_format = SB_DSP_OUTPUT;
131 break;
132 default:
133 return -EINVAL;
134 }
135 if (chip->mode & SB_MODE_PLAYBACK_16) {
136 format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT;
137 dma = chip->dma16;
138 } else {
139 format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT;
140 chip->mode |= SB_MODE_PLAYBACK_8;
141 dma = chip->dma8;
142 }
143 size = chip->p_dma_size = snd_pcm_lib_buffer_bytes(substream);
144 count = chip->p_period_size = snd_pcm_lib_period_bytes(substream);
145 spin_lock_irqsave(&chip->reg_lock, flags);
146 snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON);
147 if (chip->hardware == SB_HW_JAZZ16)
148 snd_sbdsp_command(chip, format);
149 else if (stereo) {
150 /* set playback stereo mode */
151 spin_lock(&chip->mixer_lock);
152 mixreg = snd_sbmixer_read(chip, SB_DSP_STEREO_SW);
153 snd_sbmixer_write(chip, SB_DSP_STEREO_SW, mixreg | 0x02);
154 spin_unlock(&chip->mixer_lock);
155
156 /* Soundblaster hardware programming reference guide, 3-23 */
157 snd_sbdsp_command(chip, SB_DSP_DMA8_EXIT);
158 runtime->dma_area[0] = 0x80;
159 snd_dma_program(dma, runtime->dma_addr, 1, DMA_MODE_WRITE);
160 /* force interrupt */
161 snd_sbdsp_command(chip, SB_DSP_OUTPUT);
162 snd_sbdsp_command(chip, 0);
163 snd_sbdsp_command(chip, 0);
164 }
165 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
166 if (stereo) {
167 snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
168 spin_lock(&chip->mixer_lock);
169 /* save output filter status and turn it off */
170 mixreg = snd_sbmixer_read(chip, SB_DSP_PLAYBACK_FILT);
171 snd_sbmixer_write(chip, SB_DSP_PLAYBACK_FILT, mixreg | 0x20);
172 spin_unlock(&chip->mixer_lock);
173 /* just use force_mode16 for temporary storate... */
174 chip->force_mode16 = mixreg;
175 } else {
176 snd_sbdsp_command(chip, 256 - runtime->rate_den);
177 }
178 if (chip->playback_format != SB_DSP_OUTPUT) {
179 if (chip->mode & SB_MODE_PLAYBACK_16)
180 count /= 2;
181 count--;
182 snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
183 snd_sbdsp_command(chip, count & 0xff);
184 snd_sbdsp_command(chip, count >> 8);
185 }
186 spin_unlock_irqrestore(&chip->reg_lock, flags);
187 snd_dma_program(dma, runtime->dma_addr,
188 size, DMA_MODE_WRITE | DMA_AUTOINIT);
189 return 0;
190}
191
192static int snd_sb8_playback_trigger(struct snd_pcm_substream *substream,
193 int cmd)
194{
195 unsigned long flags;
196 struct snd_sb *chip = snd_pcm_substream_chip(substream);
197 unsigned int count;
198
199 spin_lock_irqsave(&chip->reg_lock, flags);
200 switch (cmd) {
201 case SNDRV_PCM_TRIGGER_START:
202 snd_sbdsp_command(chip, chip->playback_format);
203 if (chip->playback_format == SB_DSP_OUTPUT) {
204 count = chip->p_period_size - 1;
205 snd_sbdsp_command(chip, count & 0xff);
206 snd_sbdsp_command(chip, count >> 8);
207 }
208 break;
209 case SNDRV_PCM_TRIGGER_STOP:
210 if (chip->playback_format == SB_DSP_HI_OUTPUT_AUTO) {
211 struct snd_pcm_runtime *runtime = substream->runtime;
212 snd_sbdsp_reset(chip);
213 if (runtime->channels > 1) {
214 spin_lock(&chip->mixer_lock);
215 /* restore output filter and set hardware to mono mode */
216 snd_sbmixer_write(chip, SB_DSP_STEREO_SW, chip->force_mode16 & ~0x02);
217 spin_unlock(&chip->mixer_lock);
218 }
219 } else {
220 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
221 }
222 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
223 }
224 spin_unlock_irqrestore(&chip->reg_lock, flags);
225 return 0;
226}
227
228static int snd_sb8_capture_prepare(struct snd_pcm_substream *substream)
229{
230 unsigned long flags;
231 struct snd_sb *chip = snd_pcm_substream_chip(substream);
232 struct snd_pcm_runtime *runtime = substream->runtime;
233 unsigned int mixreg, rate, size, count;
234 unsigned char format;
235 unsigned char stereo = runtime->channels > 1;
236 int dma;
237
238 rate = runtime->rate;
239 switch (chip->hardware) {
240 case SB_HW_JAZZ16:
241 if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) {
242 if (chip->mode & SB_MODE_PLAYBACK_16)
243 return -EBUSY;
244 else
245 chip->mode |= SB_MODE_CAPTURE_16;
246 }
247 chip->capture_format = SB_DSP_LO_INPUT_AUTO;
248 break;
249 case SB_HW_PRO:
250 if (runtime->channels > 1) {
251 if (snd_BUG_ON(rate != SB8_RATE(11025) &&
252 rate != SB8_RATE(22050)))
253 return -EINVAL;
254 chip->capture_format = SB_DSP_HI_INPUT_AUTO;
255 break;
256 }
257 chip->capture_format = (rate > 23000) ? SB_DSP_HI_INPUT_AUTO : SB_DSP_LO_INPUT_AUTO;
258 break;
259 case SB_HW_201:
260 if (rate > 13000) {
261 chip->capture_format = SB_DSP_HI_INPUT_AUTO;
262 break;
263 }
264 fallthrough;
265 case SB_HW_20:
266 chip->capture_format = SB_DSP_LO_INPUT_AUTO;
267 break;
268 case SB_HW_10:
269 chip->capture_format = SB_DSP_INPUT;
270 break;
271 default:
272 return -EINVAL;
273 }
274 if (chip->mode & SB_MODE_CAPTURE_16) {
275 format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT;
276 dma = chip->dma16;
277 } else {
278 format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT;
279 chip->mode |= SB_MODE_CAPTURE_8;
280 dma = chip->dma8;
281 }
282 size = chip->c_dma_size = snd_pcm_lib_buffer_bytes(substream);
283 count = chip->c_period_size = snd_pcm_lib_period_bytes(substream);
284 spin_lock_irqsave(&chip->reg_lock, flags);
285 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
286 if (chip->hardware == SB_HW_JAZZ16)
287 snd_sbdsp_command(chip, format);
288 else if (stereo)
289 snd_sbdsp_command(chip, SB_DSP_STEREO_8BIT);
290 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
291 if (stereo) {
292 snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
293 spin_lock(&chip->mixer_lock);
294 /* save input filter status and turn it off */
295 mixreg = snd_sbmixer_read(chip, SB_DSP_CAPTURE_FILT);
296 snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, mixreg | 0x20);
297 spin_unlock(&chip->mixer_lock);
298 /* just use force_mode16 for temporary storate... */
299 chip->force_mode16 = mixreg;
300 } else {
301 snd_sbdsp_command(chip, 256 - runtime->rate_den);
302 }
303 if (chip->capture_format != SB_DSP_INPUT) {
304 if (chip->mode & SB_MODE_PLAYBACK_16)
305 count /= 2;
306 count--;
307 snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
308 snd_sbdsp_command(chip, count & 0xff);
309 snd_sbdsp_command(chip, count >> 8);
310 }
311 spin_unlock_irqrestore(&chip->reg_lock, flags);
312 snd_dma_program(dma, runtime->dma_addr,
313 size, DMA_MODE_READ | DMA_AUTOINIT);
314 return 0;
315}
316
317static int snd_sb8_capture_trigger(struct snd_pcm_substream *substream,
318 int cmd)
319{
320 unsigned long flags;
321 struct snd_sb *chip = snd_pcm_substream_chip(substream);
322 unsigned int count;
323
324 spin_lock_irqsave(&chip->reg_lock, flags);
325 switch (cmd) {
326 case SNDRV_PCM_TRIGGER_START:
327 snd_sbdsp_command(chip, chip->capture_format);
328 if (chip->capture_format == SB_DSP_INPUT) {
329 count = chip->c_period_size - 1;
330 snd_sbdsp_command(chip, count & 0xff);
331 snd_sbdsp_command(chip, count >> 8);
332 }
333 break;
334 case SNDRV_PCM_TRIGGER_STOP:
335 if (chip->capture_format == SB_DSP_HI_INPUT_AUTO) {
336 struct snd_pcm_runtime *runtime = substream->runtime;
337 snd_sbdsp_reset(chip);
338 if (runtime->channels > 1) {
339 /* restore input filter status */
340 spin_lock(&chip->mixer_lock);
341 snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, chip->force_mode16);
342 spin_unlock(&chip->mixer_lock);
343 /* set hardware to mono mode */
344 snd_sbdsp_command(chip, SB_DSP_MONO_8BIT);
345 }
346 } else {
347 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
348 }
349 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
350 }
351 spin_unlock_irqrestore(&chip->reg_lock, flags);
352 return 0;
353}
354
355irqreturn_t snd_sb8dsp_interrupt(struct snd_sb *chip)
356{
357 struct snd_pcm_substream *substream;
358
359 snd_sb_ack_8bit(chip);
360 switch (chip->mode) {
361 case SB_MODE_PLAYBACK_16: /* ok.. playback is active */
362 if (chip->hardware != SB_HW_JAZZ16)
363 break;
364 fallthrough;
365 case SB_MODE_PLAYBACK_8:
366 substream = chip->playback_substream;
367 if (chip->playback_format == SB_DSP_OUTPUT)
368 snd_sb8_playback_trigger(substream, SNDRV_PCM_TRIGGER_START);
369 snd_pcm_period_elapsed(substream);
370 break;
371 case SB_MODE_CAPTURE_16:
372 if (chip->hardware != SB_HW_JAZZ16)
373 break;
374 fallthrough;
375 case SB_MODE_CAPTURE_8:
376 substream = chip->capture_substream;
377 if (chip->capture_format == SB_DSP_INPUT)
378 snd_sb8_capture_trigger(substream, SNDRV_PCM_TRIGGER_START);
379 snd_pcm_period_elapsed(substream);
380 break;
381 }
382 return IRQ_HANDLED;
383}
384
385static snd_pcm_uframes_t snd_sb8_playback_pointer(struct snd_pcm_substream *substream)
386{
387 struct snd_sb *chip = snd_pcm_substream_chip(substream);
388 size_t ptr;
389 int dma;
390
391 if (chip->mode & SB_MODE_PLAYBACK_8)
392 dma = chip->dma8;
393 else if (chip->mode & SB_MODE_PLAYBACK_16)
394 dma = chip->dma16;
395 else
396 return 0;
397 ptr = snd_dma_pointer(dma, chip->p_dma_size);
398 return bytes_to_frames(substream->runtime, ptr);
399}
400
401static snd_pcm_uframes_t snd_sb8_capture_pointer(struct snd_pcm_substream *substream)
402{
403 struct snd_sb *chip = snd_pcm_substream_chip(substream);
404 size_t ptr;
405 int dma;
406
407 if (chip->mode & SB_MODE_CAPTURE_8)
408 dma = chip->dma8;
409 else if (chip->mode & SB_MODE_CAPTURE_16)
410 dma = chip->dma16;
411 else
412 return 0;
413 ptr = snd_dma_pointer(dma, chip->c_dma_size);
414 return bytes_to_frames(substream->runtime, ptr);
415}
416
417/*
418
419 */
420
421static const struct snd_pcm_hardware snd_sb8_playback =
422{
423 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
424 SNDRV_PCM_INFO_MMAP_VALID),
425 .formats = SNDRV_PCM_FMTBIT_U8,
426 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
427 SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_22050),
428 .rate_min = 4000,
429 .rate_max = 23000,
430 .channels_min = 1,
431 .channels_max = 1,
432 .buffer_bytes_max = 65536,
433 .period_bytes_min = 64,
434 .period_bytes_max = 65536,
435 .periods_min = 1,
436 .periods_max = 1024,
437 .fifo_size = 0,
438};
439
440static const struct snd_pcm_hardware snd_sb8_capture =
441{
442 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
443 SNDRV_PCM_INFO_MMAP_VALID),
444 .formats = SNDRV_PCM_FMTBIT_U8,
445 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
446 SNDRV_PCM_RATE_11025),
447 .rate_min = 4000,
448 .rate_max = 13000,
449 .channels_min = 1,
450 .channels_max = 1,
451 .buffer_bytes_max = 65536,
452 .period_bytes_min = 64,
453 .period_bytes_max = 65536,
454 .periods_min = 1,
455 .periods_max = 1024,
456 .fifo_size = 0,
457};
458
459/*
460 *
461 */
462
463static int snd_sb8_open(struct snd_pcm_substream *substream)
464{
465 struct snd_sb *chip = snd_pcm_substream_chip(substream);
466 struct snd_pcm_runtime *runtime = substream->runtime;
467 unsigned long flags;
468
469 spin_lock_irqsave(&chip->open_lock, flags);
470 if (chip->open) {
471 spin_unlock_irqrestore(&chip->open_lock, flags);
472 return -EAGAIN;
473 }
474 chip->open |= SB_OPEN_PCM;
475 spin_unlock_irqrestore(&chip->open_lock, flags);
476 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
477 chip->playback_substream = substream;
478 runtime->hw = snd_sb8_playback;
479 } else {
480 chip->capture_substream = substream;
481 runtime->hw = snd_sb8_capture;
482 }
483 switch (chip->hardware) {
484 case SB_HW_JAZZ16:
485 if (chip->dma16 == 5 || chip->dma16 == 7)
486 runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE;
487 runtime->hw.rates |= SNDRV_PCM_RATE_8000_48000;
488 runtime->hw.rate_min = 4000;
489 runtime->hw.rate_max = 50000;
490 runtime->hw.channels_max = 2;
491 break;
492 case SB_HW_PRO:
493 runtime->hw.rate_max = 44100;
494 runtime->hw.channels_max = 2;
495 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
496 snd_sb8_hw_constraint_rate_channels, NULL,
497 SNDRV_PCM_HW_PARAM_CHANNELS,
498 SNDRV_PCM_HW_PARAM_RATE, -1);
499 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
500 snd_sb8_hw_constraint_channels_rate, NULL,
501 SNDRV_PCM_HW_PARAM_RATE, -1);
502 break;
503 case SB_HW_201:
504 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
505 runtime->hw.rate_max = 44100;
506 } else {
507 runtime->hw.rate_max = 15000;
508 }
509 default:
510 break;
511 }
512 snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
513 &hw_constraints_clock);
514 if (chip->dma8 > 3 || chip->dma16 >= 0) {
515 snd_pcm_hw_constraint_step(runtime, 0,
516 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2);
517 snd_pcm_hw_constraint_step(runtime, 0,
518 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2);
519 runtime->hw.buffer_bytes_max = 128 * 1024 * 1024;
520 runtime->hw.period_bytes_max = 128 * 1024 * 1024;
521 }
522 return 0;
523}
524
525static int snd_sb8_close(struct snd_pcm_substream *substream)
526{
527 unsigned long flags;
528 struct snd_sb *chip = snd_pcm_substream_chip(substream);
529
530 chip->playback_substream = NULL;
531 chip->capture_substream = NULL;
532 spin_lock_irqsave(&chip->open_lock, flags);
533 chip->open &= ~SB_OPEN_PCM;
534 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
535 chip->mode &= ~SB_MODE_PLAYBACK;
536 else
537 chip->mode &= ~SB_MODE_CAPTURE;
538 spin_unlock_irqrestore(&chip->open_lock, flags);
539 return 0;
540}
541
542/*
543 * Initialization part
544 */
545
546static const struct snd_pcm_ops snd_sb8_playback_ops = {
547 .open = snd_sb8_open,
548 .close = snd_sb8_close,
549 .prepare = snd_sb8_playback_prepare,
550 .trigger = snd_sb8_playback_trigger,
551 .pointer = snd_sb8_playback_pointer,
552};
553
554static const struct snd_pcm_ops snd_sb8_capture_ops = {
555 .open = snd_sb8_open,
556 .close = snd_sb8_close,
557 .prepare = snd_sb8_capture_prepare,
558 .trigger = snd_sb8_capture_trigger,
559 .pointer = snd_sb8_capture_pointer,
560};
561
562int snd_sb8dsp_pcm(struct snd_sb *chip, int device)
563{
564 struct snd_card *card = chip->card;
565 struct snd_pcm *pcm;
566 int err;
567 size_t max_prealloc = 64 * 1024;
568
569 if ((err = snd_pcm_new(card, "SB8 DSP", device, 1, 1, &pcm)) < 0)
570 return err;
571 sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff);
572 pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
573 pcm->private_data = chip;
574
575 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb8_playback_ops);
576 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb8_capture_ops);
577
578 if (chip->dma8 > 3 || chip->dma16 >= 0)
579 max_prealloc = 128 * 1024;
580 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
581 card->dev, 64*1024, max_prealloc);
582
583 return 0;
584}
585
586EXPORT_SYMBOL(snd_sb8dsp_pcm);
587EXPORT_SYMBOL(snd_sb8dsp_interrupt);
588 /* sb8_midi.c */
589EXPORT_SYMBOL(snd_sb8dsp_midi_interrupt);
590EXPORT_SYMBOL(snd_sb8dsp_midi);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 * Uros Bizjak <uros@kss-loka.si>
5 *
6 * Routines for control of 8-bit SoundBlaster cards and clones
7 * Please note: I don't have access to old SB8 soundcards.
8 *
9 * --
10 *
11 * Thu Apr 29 20:36:17 BST 1999 George David Morrison <gdm@gedamo.demon.co.uk>
12 * DSP can't respond to commands whilst in "high speed" mode. Caused
13 * glitching during playback. Fixed.
14 *
15 * Wed Jul 12 22:02:55 CEST 2000 Uros Bizjak <uros@kss-loka.si>
16 * Cleaned up and rewrote lowlevel routines.
17 */
18
19#include <linux/io.h>
20#include <asm/dma.h>
21#include <linux/init.h>
22#include <linux/time.h>
23#include <linux/module.h>
24#include <sound/core.h>
25#include <sound/sb.h>
26
27MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Uros Bizjak <uros@kss-loka.si>");
28MODULE_DESCRIPTION("Routines for control of 8-bit SoundBlaster cards and clones");
29MODULE_LICENSE("GPL");
30
31#define SB8_CLOCK 1000000
32#define SB8_DEN(v) ((SB8_CLOCK + (v) / 2) / (v))
33#define SB8_RATE(v) (SB8_CLOCK / SB8_DEN(v))
34
35static const struct snd_ratnum clock = {
36 .num = SB8_CLOCK,
37 .den_min = 1,
38 .den_max = 256,
39 .den_step = 1,
40};
41
42static const struct snd_pcm_hw_constraint_ratnums hw_constraints_clock = {
43 .nrats = 1,
44 .rats = &clock,
45};
46
47static const struct snd_ratnum stereo_clocks[] = {
48 {
49 .num = SB8_CLOCK,
50 .den_min = SB8_DEN(22050),
51 .den_max = SB8_DEN(22050),
52 .den_step = 1,
53 },
54 {
55 .num = SB8_CLOCK,
56 .den_min = SB8_DEN(11025),
57 .den_max = SB8_DEN(11025),
58 .den_step = 1,
59 }
60};
61
62static int snd_sb8_hw_constraint_rate_channels(struct snd_pcm_hw_params *params,
63 struct snd_pcm_hw_rule *rule)
64{
65 struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
66 if (c->min > 1) {
67 unsigned int num = 0, den = 0;
68 int err = snd_interval_ratnum(hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE),
69 2, stereo_clocks, &num, &den);
70 if (err >= 0 && den) {
71 params->rate_num = num;
72 params->rate_den = den;
73 }
74 return err;
75 }
76 return 0;
77}
78
79static int snd_sb8_hw_constraint_channels_rate(struct snd_pcm_hw_params *params,
80 struct snd_pcm_hw_rule *rule)
81{
82 struct snd_interval *r = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
83 if (r->min > SB8_RATE(22050) || r->max <= SB8_RATE(11025)) {
84 struct snd_interval t = { .min = 1, .max = 1 };
85 return snd_interval_refine(hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS), &t);
86 }
87 return 0;
88}
89
90static int snd_sb8_playback_prepare(struct snd_pcm_substream *substream)
91{
92 unsigned long flags;
93 struct snd_sb *chip = snd_pcm_substream_chip(substream);
94 struct snd_pcm_runtime *runtime = substream->runtime;
95 unsigned int mixreg, rate, size, count;
96 unsigned char format;
97 unsigned char stereo = runtime->channels > 1;
98 int dma;
99
100 rate = runtime->rate;
101 switch (chip->hardware) {
102 case SB_HW_JAZZ16:
103 if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) {
104 if (chip->mode & SB_MODE_CAPTURE_16)
105 return -EBUSY;
106 else
107 chip->mode |= SB_MODE_PLAYBACK_16;
108 }
109 chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
110 break;
111 case SB_HW_PRO:
112 if (runtime->channels > 1) {
113 if (snd_BUG_ON(rate != SB8_RATE(11025) &&
114 rate != SB8_RATE(22050)))
115 return -EINVAL;
116 chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
117 break;
118 }
119 /* fall through */
120 case SB_HW_201:
121 if (rate > 23000) {
122 chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
123 break;
124 }
125 /* fall through */
126 case SB_HW_20:
127 chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
128 break;
129 case SB_HW_10:
130 chip->playback_format = SB_DSP_OUTPUT;
131 break;
132 default:
133 return -EINVAL;
134 }
135 if (chip->mode & SB_MODE_PLAYBACK_16) {
136 format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT;
137 dma = chip->dma16;
138 } else {
139 format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT;
140 chip->mode |= SB_MODE_PLAYBACK_8;
141 dma = chip->dma8;
142 }
143 size = chip->p_dma_size = snd_pcm_lib_buffer_bytes(substream);
144 count = chip->p_period_size = snd_pcm_lib_period_bytes(substream);
145 spin_lock_irqsave(&chip->reg_lock, flags);
146 snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON);
147 if (chip->hardware == SB_HW_JAZZ16)
148 snd_sbdsp_command(chip, format);
149 else if (stereo) {
150 /* set playback stereo mode */
151 spin_lock(&chip->mixer_lock);
152 mixreg = snd_sbmixer_read(chip, SB_DSP_STEREO_SW);
153 snd_sbmixer_write(chip, SB_DSP_STEREO_SW, mixreg | 0x02);
154 spin_unlock(&chip->mixer_lock);
155
156 /* Soundblaster hardware programming reference guide, 3-23 */
157 snd_sbdsp_command(chip, SB_DSP_DMA8_EXIT);
158 runtime->dma_area[0] = 0x80;
159 snd_dma_program(dma, runtime->dma_addr, 1, DMA_MODE_WRITE);
160 /* force interrupt */
161 snd_sbdsp_command(chip, SB_DSP_OUTPUT);
162 snd_sbdsp_command(chip, 0);
163 snd_sbdsp_command(chip, 0);
164 }
165 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
166 if (stereo) {
167 snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
168 spin_lock(&chip->mixer_lock);
169 /* save output filter status and turn it off */
170 mixreg = snd_sbmixer_read(chip, SB_DSP_PLAYBACK_FILT);
171 snd_sbmixer_write(chip, SB_DSP_PLAYBACK_FILT, mixreg | 0x20);
172 spin_unlock(&chip->mixer_lock);
173 /* just use force_mode16 for temporary storate... */
174 chip->force_mode16 = mixreg;
175 } else {
176 snd_sbdsp_command(chip, 256 - runtime->rate_den);
177 }
178 if (chip->playback_format != SB_DSP_OUTPUT) {
179 if (chip->mode & SB_MODE_PLAYBACK_16)
180 count /= 2;
181 count--;
182 snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
183 snd_sbdsp_command(chip, count & 0xff);
184 snd_sbdsp_command(chip, count >> 8);
185 }
186 spin_unlock_irqrestore(&chip->reg_lock, flags);
187 snd_dma_program(dma, runtime->dma_addr,
188 size, DMA_MODE_WRITE | DMA_AUTOINIT);
189 return 0;
190}
191
192static int snd_sb8_playback_trigger(struct snd_pcm_substream *substream,
193 int cmd)
194{
195 unsigned long flags;
196 struct snd_sb *chip = snd_pcm_substream_chip(substream);
197 unsigned int count;
198
199 spin_lock_irqsave(&chip->reg_lock, flags);
200 switch (cmd) {
201 case SNDRV_PCM_TRIGGER_START:
202 snd_sbdsp_command(chip, chip->playback_format);
203 if (chip->playback_format == SB_DSP_OUTPUT) {
204 count = chip->p_period_size - 1;
205 snd_sbdsp_command(chip, count & 0xff);
206 snd_sbdsp_command(chip, count >> 8);
207 }
208 break;
209 case SNDRV_PCM_TRIGGER_STOP:
210 if (chip->playback_format == SB_DSP_HI_OUTPUT_AUTO) {
211 struct snd_pcm_runtime *runtime = substream->runtime;
212 snd_sbdsp_reset(chip);
213 if (runtime->channels > 1) {
214 spin_lock(&chip->mixer_lock);
215 /* restore output filter and set hardware to mono mode */
216 snd_sbmixer_write(chip, SB_DSP_STEREO_SW, chip->force_mode16 & ~0x02);
217 spin_unlock(&chip->mixer_lock);
218 }
219 } else {
220 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
221 }
222 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
223 }
224 spin_unlock_irqrestore(&chip->reg_lock, flags);
225 return 0;
226}
227
228static int snd_sb8_hw_params(struct snd_pcm_substream *substream,
229 struct snd_pcm_hw_params *hw_params)
230{
231 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
232}
233
234static int snd_sb8_hw_free(struct snd_pcm_substream *substream)
235{
236 snd_pcm_lib_free_pages(substream);
237 return 0;
238}
239
240static int snd_sb8_capture_prepare(struct snd_pcm_substream *substream)
241{
242 unsigned long flags;
243 struct snd_sb *chip = snd_pcm_substream_chip(substream);
244 struct snd_pcm_runtime *runtime = substream->runtime;
245 unsigned int mixreg, rate, size, count;
246 unsigned char format;
247 unsigned char stereo = runtime->channels > 1;
248 int dma;
249
250 rate = runtime->rate;
251 switch (chip->hardware) {
252 case SB_HW_JAZZ16:
253 if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) {
254 if (chip->mode & SB_MODE_PLAYBACK_16)
255 return -EBUSY;
256 else
257 chip->mode |= SB_MODE_CAPTURE_16;
258 }
259 chip->capture_format = SB_DSP_LO_INPUT_AUTO;
260 break;
261 case SB_HW_PRO:
262 if (runtime->channels > 1) {
263 if (snd_BUG_ON(rate != SB8_RATE(11025) &&
264 rate != SB8_RATE(22050)))
265 return -EINVAL;
266 chip->capture_format = SB_DSP_HI_INPUT_AUTO;
267 break;
268 }
269 chip->capture_format = (rate > 23000) ? SB_DSP_HI_INPUT_AUTO : SB_DSP_LO_INPUT_AUTO;
270 break;
271 case SB_HW_201:
272 if (rate > 13000) {
273 chip->capture_format = SB_DSP_HI_INPUT_AUTO;
274 break;
275 }
276 /* fall through */
277 case SB_HW_20:
278 chip->capture_format = SB_DSP_LO_INPUT_AUTO;
279 break;
280 case SB_HW_10:
281 chip->capture_format = SB_DSP_INPUT;
282 break;
283 default:
284 return -EINVAL;
285 }
286 if (chip->mode & SB_MODE_CAPTURE_16) {
287 format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT;
288 dma = chip->dma16;
289 } else {
290 format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT;
291 chip->mode |= SB_MODE_CAPTURE_8;
292 dma = chip->dma8;
293 }
294 size = chip->c_dma_size = snd_pcm_lib_buffer_bytes(substream);
295 count = chip->c_period_size = snd_pcm_lib_period_bytes(substream);
296 spin_lock_irqsave(&chip->reg_lock, flags);
297 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
298 if (chip->hardware == SB_HW_JAZZ16)
299 snd_sbdsp_command(chip, format);
300 else if (stereo)
301 snd_sbdsp_command(chip, SB_DSP_STEREO_8BIT);
302 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
303 if (stereo) {
304 snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
305 spin_lock(&chip->mixer_lock);
306 /* save input filter status and turn it off */
307 mixreg = snd_sbmixer_read(chip, SB_DSP_CAPTURE_FILT);
308 snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, mixreg | 0x20);
309 spin_unlock(&chip->mixer_lock);
310 /* just use force_mode16 for temporary storate... */
311 chip->force_mode16 = mixreg;
312 } else {
313 snd_sbdsp_command(chip, 256 - runtime->rate_den);
314 }
315 if (chip->capture_format != SB_DSP_INPUT) {
316 if (chip->mode & SB_MODE_PLAYBACK_16)
317 count /= 2;
318 count--;
319 snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
320 snd_sbdsp_command(chip, count & 0xff);
321 snd_sbdsp_command(chip, count >> 8);
322 }
323 spin_unlock_irqrestore(&chip->reg_lock, flags);
324 snd_dma_program(dma, runtime->dma_addr,
325 size, DMA_MODE_READ | DMA_AUTOINIT);
326 return 0;
327}
328
329static int snd_sb8_capture_trigger(struct snd_pcm_substream *substream,
330 int cmd)
331{
332 unsigned long flags;
333 struct snd_sb *chip = snd_pcm_substream_chip(substream);
334 unsigned int count;
335
336 spin_lock_irqsave(&chip->reg_lock, flags);
337 switch (cmd) {
338 case SNDRV_PCM_TRIGGER_START:
339 snd_sbdsp_command(chip, chip->capture_format);
340 if (chip->capture_format == SB_DSP_INPUT) {
341 count = chip->c_period_size - 1;
342 snd_sbdsp_command(chip, count & 0xff);
343 snd_sbdsp_command(chip, count >> 8);
344 }
345 break;
346 case SNDRV_PCM_TRIGGER_STOP:
347 if (chip->capture_format == SB_DSP_HI_INPUT_AUTO) {
348 struct snd_pcm_runtime *runtime = substream->runtime;
349 snd_sbdsp_reset(chip);
350 if (runtime->channels > 1) {
351 /* restore input filter status */
352 spin_lock(&chip->mixer_lock);
353 snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, chip->force_mode16);
354 spin_unlock(&chip->mixer_lock);
355 /* set hardware to mono mode */
356 snd_sbdsp_command(chip, SB_DSP_MONO_8BIT);
357 }
358 } else {
359 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
360 }
361 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
362 }
363 spin_unlock_irqrestore(&chip->reg_lock, flags);
364 return 0;
365}
366
367irqreturn_t snd_sb8dsp_interrupt(struct snd_sb *chip)
368{
369 struct snd_pcm_substream *substream;
370
371 snd_sb_ack_8bit(chip);
372 switch (chip->mode) {
373 case SB_MODE_PLAYBACK_16: /* ok.. playback is active */
374 if (chip->hardware != SB_HW_JAZZ16)
375 break;
376 /* fall through */
377 case SB_MODE_PLAYBACK_8:
378 substream = chip->playback_substream;
379 if (chip->playback_format == SB_DSP_OUTPUT)
380 snd_sb8_playback_trigger(substream, SNDRV_PCM_TRIGGER_START);
381 snd_pcm_period_elapsed(substream);
382 break;
383 case SB_MODE_CAPTURE_16:
384 if (chip->hardware != SB_HW_JAZZ16)
385 break;
386 /* fall through */
387 case SB_MODE_CAPTURE_8:
388 substream = chip->capture_substream;
389 if (chip->capture_format == SB_DSP_INPUT)
390 snd_sb8_capture_trigger(substream, SNDRV_PCM_TRIGGER_START);
391 snd_pcm_period_elapsed(substream);
392 break;
393 }
394 return IRQ_HANDLED;
395}
396
397static snd_pcm_uframes_t snd_sb8_playback_pointer(struct snd_pcm_substream *substream)
398{
399 struct snd_sb *chip = snd_pcm_substream_chip(substream);
400 size_t ptr;
401 int dma;
402
403 if (chip->mode & SB_MODE_PLAYBACK_8)
404 dma = chip->dma8;
405 else if (chip->mode & SB_MODE_PLAYBACK_16)
406 dma = chip->dma16;
407 else
408 return 0;
409 ptr = snd_dma_pointer(dma, chip->p_dma_size);
410 return bytes_to_frames(substream->runtime, ptr);
411}
412
413static snd_pcm_uframes_t snd_sb8_capture_pointer(struct snd_pcm_substream *substream)
414{
415 struct snd_sb *chip = snd_pcm_substream_chip(substream);
416 size_t ptr;
417 int dma;
418
419 if (chip->mode & SB_MODE_CAPTURE_8)
420 dma = chip->dma8;
421 else if (chip->mode & SB_MODE_CAPTURE_16)
422 dma = chip->dma16;
423 else
424 return 0;
425 ptr = snd_dma_pointer(dma, chip->c_dma_size);
426 return bytes_to_frames(substream->runtime, ptr);
427}
428
429/*
430
431 */
432
433static const struct snd_pcm_hardware snd_sb8_playback =
434{
435 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
436 SNDRV_PCM_INFO_MMAP_VALID),
437 .formats = SNDRV_PCM_FMTBIT_U8,
438 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
439 SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_22050),
440 .rate_min = 4000,
441 .rate_max = 23000,
442 .channels_min = 1,
443 .channels_max = 1,
444 .buffer_bytes_max = 65536,
445 .period_bytes_min = 64,
446 .period_bytes_max = 65536,
447 .periods_min = 1,
448 .periods_max = 1024,
449 .fifo_size = 0,
450};
451
452static const struct snd_pcm_hardware snd_sb8_capture =
453{
454 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
455 SNDRV_PCM_INFO_MMAP_VALID),
456 .formats = SNDRV_PCM_FMTBIT_U8,
457 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
458 SNDRV_PCM_RATE_11025),
459 .rate_min = 4000,
460 .rate_max = 13000,
461 .channels_min = 1,
462 .channels_max = 1,
463 .buffer_bytes_max = 65536,
464 .period_bytes_min = 64,
465 .period_bytes_max = 65536,
466 .periods_min = 1,
467 .periods_max = 1024,
468 .fifo_size = 0,
469};
470
471/*
472 *
473 */
474
475static int snd_sb8_open(struct snd_pcm_substream *substream)
476{
477 struct snd_sb *chip = snd_pcm_substream_chip(substream);
478 struct snd_pcm_runtime *runtime = substream->runtime;
479 unsigned long flags;
480
481 spin_lock_irqsave(&chip->open_lock, flags);
482 if (chip->open) {
483 spin_unlock_irqrestore(&chip->open_lock, flags);
484 return -EAGAIN;
485 }
486 chip->open |= SB_OPEN_PCM;
487 spin_unlock_irqrestore(&chip->open_lock, flags);
488 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
489 chip->playback_substream = substream;
490 runtime->hw = snd_sb8_playback;
491 } else {
492 chip->capture_substream = substream;
493 runtime->hw = snd_sb8_capture;
494 }
495 switch (chip->hardware) {
496 case SB_HW_JAZZ16:
497 if (chip->dma16 == 5 || chip->dma16 == 7)
498 runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE;
499 runtime->hw.rates |= SNDRV_PCM_RATE_8000_48000;
500 runtime->hw.rate_min = 4000;
501 runtime->hw.rate_max = 50000;
502 runtime->hw.channels_max = 2;
503 break;
504 case SB_HW_PRO:
505 runtime->hw.rate_max = 44100;
506 runtime->hw.channels_max = 2;
507 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
508 snd_sb8_hw_constraint_rate_channels, NULL,
509 SNDRV_PCM_HW_PARAM_CHANNELS,
510 SNDRV_PCM_HW_PARAM_RATE, -1);
511 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
512 snd_sb8_hw_constraint_channels_rate, NULL,
513 SNDRV_PCM_HW_PARAM_RATE, -1);
514 break;
515 case SB_HW_201:
516 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
517 runtime->hw.rate_max = 44100;
518 } else {
519 runtime->hw.rate_max = 15000;
520 }
521 default:
522 break;
523 }
524 snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
525 &hw_constraints_clock);
526 if (chip->dma8 > 3 || chip->dma16 >= 0) {
527 snd_pcm_hw_constraint_step(runtime, 0,
528 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2);
529 snd_pcm_hw_constraint_step(runtime, 0,
530 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2);
531 runtime->hw.buffer_bytes_max = 128 * 1024 * 1024;
532 runtime->hw.period_bytes_max = 128 * 1024 * 1024;
533 }
534 return 0;
535}
536
537static int snd_sb8_close(struct snd_pcm_substream *substream)
538{
539 unsigned long flags;
540 struct snd_sb *chip = snd_pcm_substream_chip(substream);
541
542 chip->playback_substream = NULL;
543 chip->capture_substream = NULL;
544 spin_lock_irqsave(&chip->open_lock, flags);
545 chip->open &= ~SB_OPEN_PCM;
546 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
547 chip->mode &= ~SB_MODE_PLAYBACK;
548 else
549 chip->mode &= ~SB_MODE_CAPTURE;
550 spin_unlock_irqrestore(&chip->open_lock, flags);
551 return 0;
552}
553
554/*
555 * Initialization part
556 */
557
558static const struct snd_pcm_ops snd_sb8_playback_ops = {
559 .open = snd_sb8_open,
560 .close = snd_sb8_close,
561 .ioctl = snd_pcm_lib_ioctl,
562 .hw_params = snd_sb8_hw_params,
563 .hw_free = snd_sb8_hw_free,
564 .prepare = snd_sb8_playback_prepare,
565 .trigger = snd_sb8_playback_trigger,
566 .pointer = snd_sb8_playback_pointer,
567};
568
569static const struct snd_pcm_ops snd_sb8_capture_ops = {
570 .open = snd_sb8_open,
571 .close = snd_sb8_close,
572 .ioctl = snd_pcm_lib_ioctl,
573 .hw_params = snd_sb8_hw_params,
574 .hw_free = snd_sb8_hw_free,
575 .prepare = snd_sb8_capture_prepare,
576 .trigger = snd_sb8_capture_trigger,
577 .pointer = snd_sb8_capture_pointer,
578};
579
580int snd_sb8dsp_pcm(struct snd_sb *chip, int device)
581{
582 struct snd_card *card = chip->card;
583 struct snd_pcm *pcm;
584 int err;
585 size_t max_prealloc = 64 * 1024;
586
587 if ((err = snd_pcm_new(card, "SB8 DSP", device, 1, 1, &pcm)) < 0)
588 return err;
589 sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff);
590 pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
591 pcm->private_data = chip;
592
593 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb8_playback_ops);
594 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb8_capture_ops);
595
596 if (chip->dma8 > 3 || chip->dma16 >= 0)
597 max_prealloc = 128 * 1024;
598 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
599 card->dev,
600 64*1024, max_prealloc);
601
602 return 0;
603}
604
605EXPORT_SYMBOL(snd_sb8dsp_pcm);
606EXPORT_SYMBOL(snd_sb8dsp_interrupt);
607 /* sb8_midi.c */
608EXPORT_SYMBOL(snd_sb8dsp_midi_interrupt);
609EXPORT_SYMBOL(snd_sb8dsp_midi);