?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Avoid beyond bounds copy while caching ACL
[zen-stable.git] / sound / isa / sb / sb8_main.c
blob24d4121ab0e06a7c083cfeb7ba8486fd91b4217e
1 /*
2 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
3 * Uros Bizjak <uros@kss-loka.si>
4 *
5 * Routines for control of 8-bit SoundBlaster cards and clones
6 * Please note: I don't have access to old SB8 soundcards.
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * --
24 *
25 * Thu Apr 29 20:36:17 BST 1999 George David Morrison <gdm@gedamo.demon.co.uk>
26 * DSP can't respond to commands whilst in "high speed" mode. Caused
27 * glitching during playback. Fixed.
28 *
29 * Wed Jul 12 22:02:55 CEST 2000 Uros Bizjak <uros@kss-loka.si>
30 * Cleaned up and rewrote lowlevel routines.
31 */
32
33 #include <asm/io.h>
34 #include <asm/dma.h>
35 #include <linux/init.h>
36 #include <linux/time.h>
37 #include <linux/module.h>
38 #include <sound/core.h>
39 #include <sound/sb.h>
40
41 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Uros Bizjak <uros@kss-loka.si>");
42 MODULE_DESCRIPTION("Routines for control of 8-bit SoundBlaster cards and clones");
43 MODULE_LICENSE("GPL");
44
45 #define SB8_CLOCK 1000000
46 #define SB8_DEN(v) ((SB8_CLOCK + (v) / 2) / (v))
47 #define SB8_RATE(v) (SB8_CLOCK / SB8_DEN(v))
48
49 static struct snd_ratnum clock = {
50 .num = SB8_CLOCK,
51 .den_min = 1,
52 .den_max = 256,
53 .den_step = 1,
54 };
55
56 static struct snd_pcm_hw_constraint_ratnums hw_constraints_clock = {
57 .nrats = 1,
58 .rats = &clock,
59 };
60
61 static struct snd_ratnum stereo_clocks[] = {
62 {
63 .num = SB8_CLOCK,
64 .den_min = SB8_DEN(22050),
65 .den_max = SB8_DEN(22050),
66 .den_step = 1,
67 },
68 {
69 .num = SB8_CLOCK,
70 .den_min = SB8_DEN(11025),
71 .den_max = SB8_DEN(11025),
72 .den_step = 1,
73 }
74 };
75
76 static int snd_sb8_hw_constraint_rate_channels(struct snd_pcm_hw_params *params,
77 struct snd_pcm_hw_rule *rule)
78 {
79 struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
80 if (c->min > 1) {
81 unsigned int num = 0, den = 0;
82 int err = snd_interval_ratnum(hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE),
83 2, stereo_clocks, &num, &den);
84 if (err >= 0 && den) {
85 params->rate_num = num;
86 params->rate_den = den;
87 }
88 return err;
89 }
90 return 0;
91 }
92
93 static int snd_sb8_hw_constraint_channels_rate(struct snd_pcm_hw_params *params,
94 struct snd_pcm_hw_rule *rule)
95 {
96 struct snd_interval *r = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
97 if (r->min > SB8_RATE(22050) || r->max <= SB8_RATE(11025)) {
98 struct snd_interval t = { .min = 1, .max = 1 };
99 return snd_interval_refine(hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS), &t);
100 }
101 return 0;
102 }
103
104 static int snd_sb8_playback_prepare(struct snd_pcm_substream *substream)
105 {
106 unsigned long flags;
107 struct snd_sb *chip = snd_pcm_substream_chip(substream);
108 struct snd_pcm_runtime *runtime = substream->runtime;
109 unsigned int mixreg, rate, size, count;
110 unsigned char format;
111 unsigned char stereo = runtime->channels > 1;
112 int dma;
113
114 rate = runtime->rate;
115 switch (chip->hardware) {
116 case SB_HW_JAZZ16:
117 if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) {
118 if (chip->mode & SB_MODE_CAPTURE_16)
119 return -EBUSY;
120 else
121 chip->mode |= SB_MODE_PLAYBACK_16;
122 }
123 chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
124 break;
125 case SB_HW_PRO:
126 if (runtime->channels > 1) {
127 if (snd_BUG_ON(rate != SB8_RATE(11025) &&
128 rate != SB8_RATE(22050)))
129 return -EINVAL;
130 chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
131 break;
132 }
133 /* fallthru */
134 case SB_HW_201:
135 if (rate > 23000) {
136 chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
137 break;
138 }
139 /* fallthru */
140 case SB_HW_20:
141 chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
142 break;
143 case SB_HW_10:
144 chip->playback_format = SB_DSP_OUTPUT;
145 break;
146 default:
147 return -EINVAL;
148 }
149 if (chip->mode & SB_MODE_PLAYBACK_16) {
150 format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT;
151 dma = chip->dma16;
152 } else {
153 format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT;
154 chip->mode |= SB_MODE_PLAYBACK_8;
155 dma = chip->dma8;
156 }
157 size = chip->p_dma_size = snd_pcm_lib_buffer_bytes(substream);
158 count = chip->p_period_size = snd_pcm_lib_period_bytes(substream);
159 spin_lock_irqsave(&chip->reg_lock, flags);
160 snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON);
161 if (chip->hardware == SB_HW_JAZZ16)
162 snd_sbdsp_command(chip, format);
163 else if (stereo) {
164 /* set playback stereo mode */
165 spin_lock(&chip->mixer_lock);
166 mixreg = snd_sbmixer_read(chip, SB_DSP_STEREO_SW);
167 snd_sbmixer_write(chip, SB_DSP_STEREO_SW, mixreg | 0x02);
168 spin_unlock(&chip->mixer_lock);
169
170 /* Soundblaster hardware programming reference guide, 3-23 */
171 snd_sbdsp_command(chip, SB_DSP_DMA8_EXIT);
172 runtime->dma_area[0] = 0x80;
173 snd_dma_program(dma, runtime->dma_addr, 1, DMA_MODE_WRITE);
174 /* force interrupt */
175 snd_sbdsp_command(chip, SB_DSP_OUTPUT);
176 snd_sbdsp_command(chip, 0);
177 snd_sbdsp_command(chip, 0);
178 }
179 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
180 if (stereo) {
181 snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
182 spin_lock(&chip->mixer_lock);
183 /* save output filter status and turn it off */
184 mixreg = snd_sbmixer_read(chip, SB_DSP_PLAYBACK_FILT);
185 snd_sbmixer_write(chip, SB_DSP_PLAYBACK_FILT, mixreg | 0x20);
186 spin_unlock(&chip->mixer_lock);
187 /* just use force_mode16 for temporary storate... */
188 chip->force_mode16 = mixreg;
189 } else {
190 snd_sbdsp_command(chip, 256 - runtime->rate_den);
191 }
192 if (chip->playback_format != SB_DSP_OUTPUT) {
193 if (chip->mode & SB_MODE_PLAYBACK_16)
194 count /= 2;
195 count--;
196 snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
197 snd_sbdsp_command(chip, count & 0xff);
198 snd_sbdsp_command(chip, count >> 8);
199 }
200 spin_unlock_irqrestore(&chip->reg_lock, flags);
201 snd_dma_program(dma, runtime->dma_addr,
202 size, DMA_MODE_WRITE | DMA_AUTOINIT);
203 return 0;
204 }
205
206 static int snd_sb8_playback_trigger(struct snd_pcm_substream *substream,
207 int cmd)
208 {
209 unsigned long flags;
210 struct snd_sb *chip = snd_pcm_substream_chip(substream);
211 unsigned int count;
212
213 spin_lock_irqsave(&chip->reg_lock, flags);
214 switch (cmd) {
215 case SNDRV_PCM_TRIGGER_START:
216 snd_sbdsp_command(chip, chip->playback_format);
217 if (chip->playback_format == SB_DSP_OUTPUT) {
218 count = chip->p_period_size - 1;
219 snd_sbdsp_command(chip, count & 0xff);
220 snd_sbdsp_command(chip, count >> 8);
221 }
222 break;
223 case SNDRV_PCM_TRIGGER_STOP:
224 if (chip->playback_format == SB_DSP_HI_OUTPUT_AUTO) {
225 struct snd_pcm_runtime *runtime = substream->runtime;
226 snd_sbdsp_reset(chip);
227 if (runtime->channels > 1) {
228 spin_lock(&chip->mixer_lock);
229 /* restore output filter and set hardware to mono mode */
230 snd_sbmixer_write(chip, SB_DSP_STEREO_SW, chip->force_mode16 & ~0x02);
231 spin_unlock(&chip->mixer_lock);
232 }
233 } else {
234 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
235 }
236 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
237 }
238 spin_unlock_irqrestore(&chip->reg_lock, flags);
239 return 0;
240 }
241
242 static int snd_sb8_hw_params(struct snd_pcm_substream *substream,
243 struct snd_pcm_hw_params *hw_params)
244 {
245 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
246 }
247
248 static int snd_sb8_hw_free(struct snd_pcm_substream *substream)
249 {
250 snd_pcm_lib_free_pages(substream);
251 return 0;
252 }
253
254 static int snd_sb8_capture_prepare(struct snd_pcm_substream *substream)
255 {
256 unsigned long flags;
257 struct snd_sb *chip = snd_pcm_substream_chip(substream);
258 struct snd_pcm_runtime *runtime = substream->runtime;
259 unsigned int mixreg, rate, size, count;
260 unsigned char format;
261 unsigned char stereo = runtime->channels > 1;
262 int dma;
263
264 rate = runtime->rate;
265 switch (chip->hardware) {
266 case SB_HW_JAZZ16:
267 if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) {
268 if (chip->mode & SB_MODE_PLAYBACK_16)
269 return -EBUSY;
270 else
271 chip->mode |= SB_MODE_CAPTURE_16;
272 }
273 chip->capture_format = SB_DSP_LO_INPUT_AUTO;
274 break;
275 case SB_HW_PRO:
276 if (runtime->channels > 1) {
277 if (snd_BUG_ON(rate != SB8_RATE(11025) &&
278 rate != SB8_RATE(22050)))
279 return -EINVAL;
280 chip->capture_format = SB_DSP_HI_INPUT_AUTO;
281 break;
282 }
283 chip->capture_format = (rate > 23000) ? SB_DSP_HI_INPUT_AUTO : SB_DSP_LO_INPUT_AUTO;
284 break;
285 case SB_HW_201:
286 if (rate > 13000) {
287 chip->capture_format = SB_DSP_HI_INPUT_AUTO;
288 break;
289 }
290 /* fallthru */
291 case SB_HW_20:
292 chip->capture_format = SB_DSP_LO_INPUT_AUTO;
293 break;
294 case SB_HW_10:
295 chip->capture_format = SB_DSP_INPUT;
296 break;
297 default:
298 return -EINVAL;
299 }
300 if (chip->mode & SB_MODE_CAPTURE_16) {
301 format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT;
302 dma = chip->dma16;
303 } else {
304 format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT;
305 chip->mode |= SB_MODE_CAPTURE_8;
306 dma = chip->dma8;
307 }
308 size = chip->c_dma_size = snd_pcm_lib_buffer_bytes(substream);
309 count = chip->c_period_size = snd_pcm_lib_period_bytes(substream);
310 spin_lock_irqsave(&chip->reg_lock, flags);
311 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
312 if (chip->hardware == SB_HW_JAZZ16)
313 snd_sbdsp_command(chip, format);
314 else if (stereo)
315 snd_sbdsp_command(chip, SB_DSP_STEREO_8BIT);
316 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
317 if (stereo) {
318 snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
319 spin_lock(&chip->mixer_lock);
320 /* save input filter status and turn it off */
321 mixreg = snd_sbmixer_read(chip, SB_DSP_CAPTURE_FILT);
322 snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, mixreg | 0x20);
323 spin_unlock(&chip->mixer_lock);
324 /* just use force_mode16 for temporary storate... */
325 chip->force_mode16 = mixreg;
326 } else {
327 snd_sbdsp_command(chip, 256 - runtime->rate_den);
328 }
329 if (chip->capture_format != SB_DSP_INPUT) {
330 if (chip->mode & SB_MODE_PLAYBACK_16)
331 count /= 2;
332 count--;
333 snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
334 snd_sbdsp_command(chip, count & 0xff);
335 snd_sbdsp_command(chip, count >> 8);
336 }
337 spin_unlock_irqrestore(&chip->reg_lock, flags);
338 snd_dma_program(dma, runtime->dma_addr,
339 size, DMA_MODE_READ | DMA_AUTOINIT);
340 return 0;
341 }
342
343 static int snd_sb8_capture_trigger(struct snd_pcm_substream *substream,
344 int cmd)
345 {
346 unsigned long flags;
347 struct snd_sb *chip = snd_pcm_substream_chip(substream);
348 unsigned int count;
349
350 spin_lock_irqsave(&chip->reg_lock, flags);
351 switch (cmd) {
352 case SNDRV_PCM_TRIGGER_START:
353 snd_sbdsp_command(chip, chip->capture_format);
354 if (chip->capture_format == SB_DSP_INPUT) {
355 count = chip->c_period_size - 1;
356 snd_sbdsp_command(chip, count & 0xff);
357 snd_sbdsp_command(chip, count >> 8);
358 }
359 break;
360 case SNDRV_PCM_TRIGGER_STOP:
361 if (chip->capture_format == SB_DSP_HI_INPUT_AUTO) {
362 struct snd_pcm_runtime *runtime = substream->runtime;
363 snd_sbdsp_reset(chip);
364 if (runtime->channels > 1) {
365 /* restore input filter status */
366 spin_lock(&chip->mixer_lock);
367 snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, chip->force_mode16);
368 spin_unlock(&chip->mixer_lock);
369 /* set hardware to mono mode */
370 snd_sbdsp_command(chip, SB_DSP_MONO_8BIT);
371 }
372 } else {
373 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
374 }
375 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
376 }
377 spin_unlock_irqrestore(&chip->reg_lock, flags);
378 return 0;
379 }
380
381 irqreturn_t snd_sb8dsp_interrupt(struct snd_sb *chip)
382 {
383 struct snd_pcm_substream *substream;
384 struct snd_pcm_runtime *runtime;
385
386 snd_sb_ack_8bit(chip);
387 switch (chip->mode) {
388 case SB_MODE_PLAYBACK_16: /* ok.. playback is active */
389 if (chip->hardware != SB_HW_JAZZ16)
390 break;
391 /* fallthru */
392 case SB_MODE_PLAYBACK_8:
393 substream = chip->playback_substream;
394 runtime = substream->runtime;
395 if (chip->playback_format == SB_DSP_OUTPUT)
396 snd_sb8_playback_trigger(substream, SNDRV_PCM_TRIGGER_START);
397 snd_pcm_period_elapsed(substream);
398 break;
399 case SB_MODE_CAPTURE_16:
400 if (chip->hardware != SB_HW_JAZZ16)
401 break;
402 /* fallthru */
403 case SB_MODE_CAPTURE_8:
404 substream = chip->capture_substream;
405 runtime = substream->runtime;
406 if (chip->capture_format == SB_DSP_INPUT)
407 snd_sb8_capture_trigger(substream, SNDRV_PCM_TRIGGER_START);
408 snd_pcm_period_elapsed(substream);
409 break;
410 }
411 return IRQ_HANDLED;
412 }
413
414 static snd_pcm_uframes_t snd_sb8_playback_pointer(struct snd_pcm_substream *substream)
415 {
416 struct snd_sb *chip = snd_pcm_substream_chip(substream);
417 size_t ptr;
418 int dma;
419
420 if (chip->mode & SB_MODE_PLAYBACK_8)
421 dma = chip->dma8;
422 else if (chip->mode & SB_MODE_PLAYBACK_16)
423 dma = chip->dma16;
424 else
425 return 0;
426 ptr = snd_dma_pointer(dma, chip->p_dma_size);
427 return bytes_to_frames(substream->runtime, ptr);
428 }
429
430 static snd_pcm_uframes_t snd_sb8_capture_pointer(struct snd_pcm_substream *substream)
431 {
432 struct snd_sb *chip = snd_pcm_substream_chip(substream);
433 size_t ptr;
434 int dma;
435
436 if (chip->mode & SB_MODE_CAPTURE_8)
437 dma = chip->dma8;
438 else if (chip->mode & SB_MODE_CAPTURE_16)
439 dma = chip->dma16;
440 else
441 return 0;
442 ptr = snd_dma_pointer(dma, chip->c_dma_size);
443 return bytes_to_frames(substream->runtime, ptr);
444 }
445
446 /*
447
448 */
449
450 static struct snd_pcm_hardware snd_sb8_playback =
451 {
452 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
453 SNDRV_PCM_INFO_MMAP_VALID),
454 .formats = SNDRV_PCM_FMTBIT_U8,
455 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
456 SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_22050),
457 .rate_min = 4000,
458 .rate_max = 23000,
459 .channels_min = 1,
460 .channels_max = 1,
461 .buffer_bytes_max = 65536,
462 .period_bytes_min = 64,
463 .period_bytes_max = 65536,
464 .periods_min = 1,
465 .periods_max = 1024,
466 .fifo_size = 0,
467 };
468
469 static struct snd_pcm_hardware snd_sb8_capture =
470 {
471 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
472 SNDRV_PCM_INFO_MMAP_VALID),
473 .formats = SNDRV_PCM_FMTBIT_U8,
474 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
475 SNDRV_PCM_RATE_11025),
476 .rate_min = 4000,
477 .rate_max = 13000,
478 .channels_min = 1,
479 .channels_max = 1,
480 .buffer_bytes_max = 65536,
481 .period_bytes_min = 64,
482 .period_bytes_max = 65536,
483 .periods_min = 1,
484 .periods_max = 1024,
485 .fifo_size = 0,
486 };
487
488 /*
489 *
490 */
491
492 static int snd_sb8_open(struct snd_pcm_substream *substream)
493 {
494 struct snd_sb *chip = snd_pcm_substream_chip(substream);
495 struct snd_pcm_runtime *runtime = substream->runtime;
496 unsigned long flags;
497
498 spin_lock_irqsave(&chip->open_lock, flags);
499 if (chip->open) {
500 spin_unlock_irqrestore(&chip->open_lock, flags);
501 return -EAGAIN;
502 }
503 chip->open |= SB_OPEN_PCM;
504 spin_unlock_irqrestore(&chip->open_lock, flags);
505 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
506 chip->playback_substream = substream;
507 runtime->hw = snd_sb8_playback;
508 } else {
509 chip->capture_substream = substream;
510 runtime->hw = snd_sb8_capture;
511 }
512 switch (chip->hardware) {
513 case SB_HW_JAZZ16:
514 if (chip->dma16 == 5 || chip->dma16 == 7)
515 runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE;
516 runtime->hw.rates |= SNDRV_PCM_RATE_8000_48000;
517 runtime->hw.rate_min = 4000;
518 runtime->hw.rate_max = 50000;
519 runtime->hw.channels_max = 2;
520 break;
521 case SB_HW_PRO:
522 runtime->hw.rate_max = 44100;
523 runtime->hw.channels_max = 2;
524 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
525 snd_sb8_hw_constraint_rate_channels, NULL,
526 SNDRV_PCM_HW_PARAM_CHANNELS,
527 SNDRV_PCM_HW_PARAM_RATE, -1);
528 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
529 snd_sb8_hw_constraint_channels_rate, NULL,
530 SNDRV_PCM_HW_PARAM_RATE, -1);
531 break;
532 case SB_HW_201:
533 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
534 runtime->hw.rate_max = 44100;
535 } else {
536 runtime->hw.rate_max = 15000;
537 }
538 default:
539 break;
540 }
541 snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
542 &hw_constraints_clock);
543 if (chip->dma8 > 3 || chip->dma16 >= 0) {
544 snd_pcm_hw_constraint_step(runtime, 0,
545 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2);
546 snd_pcm_hw_constraint_step(runtime, 0,
547 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2);
548 runtime->hw.buffer_bytes_max = 128 * 1024 * 1024;
549 runtime->hw.period_bytes_max = 128 * 1024 * 1024;
550 }
551 return 0;
552 }
553
554 static int snd_sb8_close(struct snd_pcm_substream *substream)
555 {
556 unsigned long flags;
557 struct snd_sb *chip = snd_pcm_substream_chip(substream);
558
559 chip->playback_substream = NULL;
560 chip->capture_substream = NULL;
561 spin_lock_irqsave(&chip->open_lock, flags);
562 chip->open &= ~SB_OPEN_PCM;
563 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
564 chip->mode &= ~SB_MODE_PLAYBACK;
565 else
566 chip->mode &= ~SB_MODE_CAPTURE;
567 spin_unlock_irqrestore(&chip->open_lock, flags);
568 return 0;
569 }
570
571 /*
572 * Initialization part
573 */
574
575 static struct snd_pcm_ops snd_sb8_playback_ops = {
576 .open = snd_sb8_open,
577 .close = snd_sb8_close,
578 .ioctl = snd_pcm_lib_ioctl,
579 .hw_params = snd_sb8_hw_params,
580 .hw_free = snd_sb8_hw_free,
581 .prepare = snd_sb8_playback_prepare,
582 .trigger = snd_sb8_playback_trigger,
583 .pointer = snd_sb8_playback_pointer,
584 };
585
586 static struct snd_pcm_ops snd_sb8_capture_ops = {
587 .open = snd_sb8_open,
588 .close = snd_sb8_close,
589 .ioctl = snd_pcm_lib_ioctl,
590 .hw_params = snd_sb8_hw_params,
591 .hw_free = snd_sb8_hw_free,
592 .prepare = snd_sb8_capture_prepare,
593 .trigger = snd_sb8_capture_trigger,
594 .pointer = snd_sb8_capture_pointer,
595 };
596
597 int snd_sb8dsp_pcm(struct snd_sb *chip, int device, struct snd_pcm ** rpcm)
598 {
599 struct snd_card *card = chip->card;
600 struct snd_pcm *pcm;
601 int err;
602 size_t max_prealloc = 64 * 1024;
603
604 if (rpcm)
605 *rpcm = NULL;
606 if ((err = snd_pcm_new(card, "SB8 DSP", device, 1, 1, &pcm)) < 0)
607 return err;
608 sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff);
609 pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
610 pcm->private_data = chip;
611
612 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb8_playback_ops);
613 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb8_capture_ops);
614
615 if (chip->dma8 > 3 || chip->dma16 >= 0)
616 max_prealloc = 128 * 1024;
617 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
618 snd_dma_isa_data(),
619 64*1024, max_prealloc);
620
621 if (rpcm)
622 *rpcm = pcm;
623 return 0;
624 }
625
626 EXPORT_SYMBOL(snd_sb8dsp_pcm);
627 EXPORT_SYMBOL(snd_sb8dsp_interrupt);
628 /* sb8_midi.c */
629 EXPORT_SYMBOL(snd_sb8dsp_midi_interrupt);
630 EXPORT_SYMBOL(snd_sb8dsp_midi);
631
632 /*
633 * INIT part
634 */
635
636 static int __init alsa_sb8_init(void)
637 {
638 return 0;
639 }
640
641 static void __exit alsa_sb8_exit(void)
642 {
643 }
644
645 module_init(alsa_sb8_init)
646 module_exit(alsa_sb8_exit)