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
27 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Uros Bizjak <uros@kss-loka.si>");
28 MODULE_DESCRIPTION("Routines for control of 8-bit SoundBlaster cards and clones");
29 MODULE_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
35 static const struct snd_ratnum clock = {
36 .num = SB8_CLOCK,
37 .den_min = 1,
38 .den_max = 256,
39 .den_step = 1,
40 };
41
42 static const struct snd_pcm_hw_constraint_ratnums hw_constraints_clock = {
43 .nrats = 1,
44 .rats = &clock,
45 };
46
47 static 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
snd_sb8_hw_constraint_rate_channels(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)62 static 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
snd_sb8_hw_constraint_channels_rate(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)79 static 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
snd_sb8_playback_prepare(struct snd_pcm_substream * substream)90 static 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
snd_sb8_playback_trigger(struct snd_pcm_substream * substream,int cmd)192 static 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
snd_sb8_capture_prepare(struct snd_pcm_substream * substream)228 static 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
snd_sb8_capture_trigger(struct snd_pcm_substream * substream,int cmd)317 static 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
snd_sb8dsp_interrupt(struct snd_sb * chip)355 irqreturn_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
snd_sb8_playback_pointer(struct snd_pcm_substream * substream)385 static 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
snd_sb8_capture_pointer(struct snd_pcm_substream * substream)401 static 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
421 static 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
440 static 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
snd_sb8_open(struct snd_pcm_substream * substream)463 static 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 break;
510 default:
511 break;
512 }
513 snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
514 &hw_constraints_clock);
515 if (chip->dma8 > 3 || chip->dma16 >= 0) {
516 snd_pcm_hw_constraint_step(runtime, 0,
517 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2);
518 snd_pcm_hw_constraint_step(runtime, 0,
519 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2);
520 runtime->hw.buffer_bytes_max = 128 * 1024 * 1024;
521 runtime->hw.period_bytes_max = 128 * 1024 * 1024;
522 }
523 return 0;
524 }
525
snd_sb8_close(struct snd_pcm_substream * substream)526 static int snd_sb8_close(struct snd_pcm_substream *substream)
527 {
528 unsigned long flags;
529 struct snd_sb *chip = snd_pcm_substream_chip(substream);
530
531 chip->playback_substream = NULL;
532 chip->capture_substream = NULL;
533 spin_lock_irqsave(&chip->open_lock, flags);
534 chip->open &= ~SB_OPEN_PCM;
535 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
536 chip->mode &= ~SB_MODE_PLAYBACK;
537 else
538 chip->mode &= ~SB_MODE_CAPTURE;
539 spin_unlock_irqrestore(&chip->open_lock, flags);
540 return 0;
541 }
542
543 /*
544 * Initialization part
545 */
546
547 static const struct snd_pcm_ops snd_sb8_playback_ops = {
548 .open = snd_sb8_open,
549 .close = snd_sb8_close,
550 .prepare = snd_sb8_playback_prepare,
551 .trigger = snd_sb8_playback_trigger,
552 .pointer = snd_sb8_playback_pointer,
553 };
554
555 static const struct snd_pcm_ops snd_sb8_capture_ops = {
556 .open = snd_sb8_open,
557 .close = snd_sb8_close,
558 .prepare = snd_sb8_capture_prepare,
559 .trigger = snd_sb8_capture_trigger,
560 .pointer = snd_sb8_capture_pointer,
561 };
562
snd_sb8dsp_pcm(struct snd_sb * chip,int device)563 int snd_sb8dsp_pcm(struct snd_sb *chip, int device)
564 {
565 struct snd_card *card = chip->card;
566 struct snd_pcm *pcm;
567 int err;
568 size_t max_prealloc = 64 * 1024;
569
570 err = snd_pcm_new(card, "SB8 DSP", device, 1, 1, &pcm);
571 if (err < 0)
572 return err;
573 sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff);
574 pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
575 pcm->private_data = chip;
576
577 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb8_playback_ops);
578 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb8_capture_ops);
579
580 if (chip->dma8 > 3 || chip->dma16 >= 0)
581 max_prealloc = 128 * 1024;
582 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
583 card->dev, 64*1024, max_prealloc);
584
585 return 0;
586 }
587
588 EXPORT_SYMBOL(snd_sb8dsp_pcm);
589 EXPORT_SYMBOL(snd_sb8dsp_interrupt);
590 /* sb8_midi.c */
591 EXPORT_SYMBOL(snd_sb8dsp_midi_interrupt);
592 EXPORT_SYMBOL(snd_sb8dsp_midi);
593