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 <linux/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 const struct snd_ratnum clock = {
50 .num = SB8_CLOCK,
51 .den_min = 1,
52 .den_max = 256,
53 .den_step = 1,
54 };
55
56 static const struct snd_pcm_hw_constraint_ratnums hw_constraints_clock = {
57 .nrats = 1,
58 .rats = &clock,
59 };
60
61 static const 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
snd_sb8_hw_constraint_rate_channels(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)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
snd_sb8_hw_constraint_channels_rate(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)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
snd_sb8_playback_prepare(struct snd_pcm_substream * substream)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
snd_sb8_playback_trigger(struct snd_pcm_substream * substream,int cmd)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
snd_sb8_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)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
snd_sb8_hw_free(struct snd_pcm_substream * substream)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
snd_sb8_capture_prepare(struct snd_pcm_substream * substream)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
snd_sb8_capture_trigger(struct snd_pcm_substream * substream,int cmd)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
snd_sb8dsp_interrupt(struct snd_sb * chip)381 irqreturn_t snd_sb8dsp_interrupt(struct snd_sb *chip)
382 {
383 struct snd_pcm_substream *substream;
384
385 snd_sb_ack_8bit(chip);
386 switch (chip->mode) {
387 case SB_MODE_PLAYBACK_16: /* ok.. playback is active */
388 if (chip->hardware != SB_HW_JAZZ16)
389 break;
390 /* fallthru */
391 case SB_MODE_PLAYBACK_8:
392 substream = chip->playback_substream;
393 if (chip->playback_format == SB_DSP_OUTPUT)
394 snd_sb8_playback_trigger(substream, SNDRV_PCM_TRIGGER_START);
395 snd_pcm_period_elapsed(substream);
396 break;
397 case SB_MODE_CAPTURE_16:
398 if (chip->hardware != SB_HW_JAZZ16)
399 break;
400 /* fallthru */
401 case SB_MODE_CAPTURE_8:
402 substream = chip->capture_substream;
403 if (chip->capture_format == SB_DSP_INPUT)
404 snd_sb8_capture_trigger(substream, SNDRV_PCM_TRIGGER_START);
405 snd_pcm_period_elapsed(substream);
406 break;
407 }
408 return IRQ_HANDLED;
409 }
410
snd_sb8_playback_pointer(struct snd_pcm_substream * substream)411 static snd_pcm_uframes_t snd_sb8_playback_pointer(struct snd_pcm_substream *substream)
412 {
413 struct snd_sb *chip = snd_pcm_substream_chip(substream);
414 size_t ptr;
415 int dma;
416
417 if (chip->mode & SB_MODE_PLAYBACK_8)
418 dma = chip->dma8;
419 else if (chip->mode & SB_MODE_PLAYBACK_16)
420 dma = chip->dma16;
421 else
422 return 0;
423 ptr = snd_dma_pointer(dma, chip->p_dma_size);
424 return bytes_to_frames(substream->runtime, ptr);
425 }
426
snd_sb8_capture_pointer(struct snd_pcm_substream * substream)427 static snd_pcm_uframes_t snd_sb8_capture_pointer(struct snd_pcm_substream *substream)
428 {
429 struct snd_sb *chip = snd_pcm_substream_chip(substream);
430 size_t ptr;
431 int dma;
432
433 if (chip->mode & SB_MODE_CAPTURE_8)
434 dma = chip->dma8;
435 else if (chip->mode & SB_MODE_CAPTURE_16)
436 dma = chip->dma16;
437 else
438 return 0;
439 ptr = snd_dma_pointer(dma, chip->c_dma_size);
440 return bytes_to_frames(substream->runtime, ptr);
441 }
442
443 /*
444
445 */
446
447 static const struct snd_pcm_hardware snd_sb8_playback =
448 {
449 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
450 SNDRV_PCM_INFO_MMAP_VALID),
451 .formats = SNDRV_PCM_FMTBIT_U8,
452 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
453 SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_22050),
454 .rate_min = 4000,
455 .rate_max = 23000,
456 .channels_min = 1,
457 .channels_max = 1,
458 .buffer_bytes_max = 65536,
459 .period_bytes_min = 64,
460 .period_bytes_max = 65536,
461 .periods_min = 1,
462 .periods_max = 1024,
463 .fifo_size = 0,
464 };
465
466 static const struct snd_pcm_hardware snd_sb8_capture =
467 {
468 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
469 SNDRV_PCM_INFO_MMAP_VALID),
470 .formats = SNDRV_PCM_FMTBIT_U8,
471 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
472 SNDRV_PCM_RATE_11025),
473 .rate_min = 4000,
474 .rate_max = 13000,
475 .channels_min = 1,
476 .channels_max = 1,
477 .buffer_bytes_max = 65536,
478 .period_bytes_min = 64,
479 .period_bytes_max = 65536,
480 .periods_min = 1,
481 .periods_max = 1024,
482 .fifo_size = 0,
483 };
484
485 /*
486 *
487 */
488
snd_sb8_open(struct snd_pcm_substream * substream)489 static int snd_sb8_open(struct snd_pcm_substream *substream)
490 {
491 struct snd_sb *chip = snd_pcm_substream_chip(substream);
492 struct snd_pcm_runtime *runtime = substream->runtime;
493 unsigned long flags;
494
495 spin_lock_irqsave(&chip->open_lock, flags);
496 if (chip->open) {
497 spin_unlock_irqrestore(&chip->open_lock, flags);
498 return -EAGAIN;
499 }
500 chip->open |= SB_OPEN_PCM;
501 spin_unlock_irqrestore(&chip->open_lock, flags);
502 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
503 chip->playback_substream = substream;
504 runtime->hw = snd_sb8_playback;
505 } else {
506 chip->capture_substream = substream;
507 runtime->hw = snd_sb8_capture;
508 }
509 switch (chip->hardware) {
510 case SB_HW_JAZZ16:
511 if (chip->dma16 == 5 || chip->dma16 == 7)
512 runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE;
513 runtime->hw.rates |= SNDRV_PCM_RATE_8000_48000;
514 runtime->hw.rate_min = 4000;
515 runtime->hw.rate_max = 50000;
516 runtime->hw.channels_max = 2;
517 break;
518 case SB_HW_PRO:
519 runtime->hw.rate_max = 44100;
520 runtime->hw.channels_max = 2;
521 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
522 snd_sb8_hw_constraint_rate_channels, NULL,
523 SNDRV_PCM_HW_PARAM_CHANNELS,
524 SNDRV_PCM_HW_PARAM_RATE, -1);
525 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
526 snd_sb8_hw_constraint_channels_rate, NULL,
527 SNDRV_PCM_HW_PARAM_RATE, -1);
528 break;
529 case SB_HW_201:
530 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
531 runtime->hw.rate_max = 44100;
532 } else {
533 runtime->hw.rate_max = 15000;
534 }
535 default:
536 break;
537 }
538 snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
539 &hw_constraints_clock);
540 if (chip->dma8 > 3 || chip->dma16 >= 0) {
541 snd_pcm_hw_constraint_step(runtime, 0,
542 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2);
543 snd_pcm_hw_constraint_step(runtime, 0,
544 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2);
545 runtime->hw.buffer_bytes_max = 128 * 1024 * 1024;
546 runtime->hw.period_bytes_max = 128 * 1024 * 1024;
547 }
548 return 0;
549 }
550
snd_sb8_close(struct snd_pcm_substream * substream)551 static int snd_sb8_close(struct snd_pcm_substream *substream)
552 {
553 unsigned long flags;
554 struct snd_sb *chip = snd_pcm_substream_chip(substream);
555
556 chip->playback_substream = NULL;
557 chip->capture_substream = NULL;
558 spin_lock_irqsave(&chip->open_lock, flags);
559 chip->open &= ~SB_OPEN_PCM;
560 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
561 chip->mode &= ~SB_MODE_PLAYBACK;
562 else
563 chip->mode &= ~SB_MODE_CAPTURE;
564 spin_unlock_irqrestore(&chip->open_lock, flags);
565 return 0;
566 }
567
568 /*
569 * Initialization part
570 */
571
572 static const struct snd_pcm_ops snd_sb8_playback_ops = {
573 .open = snd_sb8_open,
574 .close = snd_sb8_close,
575 .ioctl = snd_pcm_lib_ioctl,
576 .hw_params = snd_sb8_hw_params,
577 .hw_free = snd_sb8_hw_free,
578 .prepare = snd_sb8_playback_prepare,
579 .trigger = snd_sb8_playback_trigger,
580 .pointer = snd_sb8_playback_pointer,
581 };
582
583 static const struct snd_pcm_ops snd_sb8_capture_ops = {
584 .open = snd_sb8_open,
585 .close = snd_sb8_close,
586 .ioctl = snd_pcm_lib_ioctl,
587 .hw_params = snd_sb8_hw_params,
588 .hw_free = snd_sb8_hw_free,
589 .prepare = snd_sb8_capture_prepare,
590 .trigger = snd_sb8_capture_trigger,
591 .pointer = snd_sb8_capture_pointer,
592 };
593
snd_sb8dsp_pcm(struct snd_sb * chip,int device)594 int snd_sb8dsp_pcm(struct snd_sb *chip, int device)
595 {
596 struct snd_card *card = chip->card;
597 struct snd_pcm *pcm;
598 int err;
599 size_t max_prealloc = 64 * 1024;
600
601 if ((err = snd_pcm_new(card, "SB8 DSP", device, 1, 1, &pcm)) < 0)
602 return err;
603 sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff);
604 pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
605 pcm->private_data = chip;
606
607 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb8_playback_ops);
608 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb8_capture_ops);
609
610 if (chip->dma8 > 3 || chip->dma16 >= 0)
611 max_prealloc = 128 * 1024;
612 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
613 snd_dma_isa_data(),
614 64*1024, max_prealloc);
615
616 return 0;
617 }
618
619 EXPORT_SYMBOL(snd_sb8dsp_pcm);
620 EXPORT_SYMBOL(snd_sb8dsp_interrupt);
621 /* sb8_midi.c */
622 EXPORT_SYMBOL(snd_sb8dsp_midi_interrupt);
623 EXPORT_SYMBOL(snd_sb8dsp_midi);
624
