File: /usr/src/linux/drivers/sound/sb_audio.c
1 /*
2 * sound/sb_audio.c
3 *
4 * Audio routines for Sound Blaster compatible cards.
5 *
6 *
7 * Copyright (C) by Hannu Savolainen 1993-1997
8 *
9 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
10 * Version 2 (June 1991). See the "COPYING" file distributed with this software
11 * for more info.
12 *
13 * Changes
14 * Alan Cox : Formatting and clean ups
15 *
16 * Status
17 * Mostly working. Weird uart bug causing irq storms
18 *
19 * Daniel J. Rodriksson: Changes to make sb16 work full duplex.
20 * Maybe other 16 bit cards in this code could behave
21 * the same.
22 * Chris Rankin: Use spinlocks instead of CLI/STI
23 */
24
25 #include <linux/spinlock.h>
26
27 #include "sound_config.h"
28
29 #include "sb_mixer.h"
30 #include "sb.h"
31
32 #include "sb_ess.h"
33
34 int sb_audio_open(int dev, int mode)
35 {
36 sb_devc *devc = audio_devs[dev]->devc;
37 unsigned long flags;
38
39 if (devc == NULL)
40 {
41 printk(KERN_ERR "Sound Blaster: incomplete initialization.\n");
42 return -ENXIO;
43 }
44 if (devc->caps & SB_NO_RECORDING && mode & OPEN_READ)
45 {
46 if (mode == OPEN_READ)
47 return -EPERM;
48 }
49 spin_lock_irqsave(&devc->lock, flags);
50 if (devc->opened)
51 {
52 spin_unlock_irqrestore(&devc->lock, flags);
53 return -EBUSY;
54 }
55 if (devc->dma16 != -1 && devc->dma16 != devc->dma8 && !devc->duplex)
56 {
57 if (sound_open_dma(devc->dma16, "Sound Blaster 16 bit"))
58 {
59 spin_unlock_irqrestore(&devc->lock, flags);
60 return -EBUSY;
61 }
62 }
63 devc->opened = mode;
64 spin_unlock_irqrestore(&devc->lock, flags);
65
66 devc->irq_mode = IMODE_NONE;
67 devc->irq_mode_16 = IMODE_NONE;
68 devc->fullduplex = devc->duplex &&
69 ((mode & OPEN_READ) && (mode & OPEN_WRITE));
70 sb_dsp_reset(devc);
71
72 /* At first glance this check isn't enough, some ESS chips might not
73 * have a RECLEV. However if they don't common_mixer_set will refuse
74 * cause devc->iomap has no register mapping for RECLEV
75 */
76 if (devc->model == MDL_ESS) ess_mixer_reload (devc, SOUND_MIXER_RECLEV);
77
78 /* The ALS007 seems to require that the DSP be removed from the output */
79 /* in order for recording to be activated properly. This is done by */
80 /* setting the appropriate bits of the output control register 4ch to */
81 /* zero. This code assumes that the output control registers are not */
82 /* used anywhere else and therefore the DSP bits are *always* ON for */
83 /* output and OFF for sampling. */
84
85 if (devc->submodel == SUBMDL_ALS007)
86 {
87 if (mode & OPEN_READ)
88 sb_setmixer(devc,ALS007_OUTPUT_CTRL2,
89 sb_getmixer(devc,ALS007_OUTPUT_CTRL2) & 0xf9);
90 else
91 sb_setmixer(devc,ALS007_OUTPUT_CTRL2,
92 sb_getmixer(devc,ALS007_OUTPUT_CTRL2) | 0x06);
93 }
94 return 0;
95 }
96
97 void sb_audio_close(int dev)
98 {
99 sb_devc *devc = audio_devs[dev]->devc;
100
101 /* fix things if mmap turned off fullduplex */
102 if(devc->duplex
103 && !devc->fullduplex
104 && (devc->opened & OPEN_READ) && (devc->opened & OPEN_WRITE))
105 {
106 struct dma_buffparms *dmap_temp;
107 dmap_temp = audio_devs[dev]->dmap_out;
108 audio_devs[dev]->dmap_out = audio_devs[dev]->dmap_in;
109 audio_devs[dev]->dmap_in = dmap_temp;
110 }
111 audio_devs[dev]->dmap_out->dma = devc->dma8;
112 audio_devs[dev]->dmap_in->dma = ( devc->duplex ) ?
113 devc->dma16 : devc->dma8;
114
115 if (devc->dma16 != -1 && devc->dma16 != devc->dma8 && !devc->duplex)
116 sound_close_dma(devc->dma16);
117
118 /* For ALS007, turn DSP output back on if closing the device for read */
119
120 if ((devc->submodel == SUBMDL_ALS007) && (devc->opened & OPEN_READ))
121 {
122 sb_setmixer(devc,ALS007_OUTPUT_CTRL2,
123 sb_getmixer(devc,ALS007_OUTPUT_CTRL2) | 0x06);
124 }
125 devc->opened = 0;
126 }
127
128 static void sb_set_output_parms(int dev, unsigned long buf, int nr_bytes,
129 int intrflag)
130 {
131 sb_devc *devc = audio_devs[dev]->devc;
132
133 if (!devc->fullduplex || devc->bits == AFMT_S16_LE)
134 {
135 devc->trg_buf = buf;
136 devc->trg_bytes = nr_bytes;
137 devc->trg_intrflag = intrflag;
138 devc->irq_mode = IMODE_OUTPUT;
139 }
140 else
141 {
142 devc->trg_buf_16 = buf;
143 devc->trg_bytes_16 = nr_bytes;
144 devc->trg_intrflag_16 = intrflag;
145 devc->irq_mode_16 = IMODE_OUTPUT;
146 }
147 }
148
149 static void sb_set_input_parms(int dev, unsigned long buf, int count, int intrflag)
150 {
151 sb_devc *devc = audio_devs[dev]->devc;
152
153 if (!devc->fullduplex || devc->bits != AFMT_S16_LE)
154 {
155 devc->trg_buf = buf;
156 devc->trg_bytes = count;
157 devc->trg_intrflag = intrflag;
158 devc->irq_mode = IMODE_INPUT;
159 }
160 else
161 {
162 devc->trg_buf_16 = buf;
163 devc->trg_bytes_16 = count;
164 devc->trg_intrflag_16 = intrflag;
165 devc->irq_mode_16 = IMODE_INPUT;
166 }
167 }
168
169 /*
170 * SB1.x compatible routines
171 */
172
173 static void sb1_audio_output_block(int dev, unsigned long buf, int nr_bytes, int intrflag)
174 {
175 unsigned long flags;
176 int count = nr_bytes;
177 sb_devc *devc = audio_devs[dev]->devc;
178
179 /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
180
181 if (audio_devs[dev]->dmap_out->dma > 3)
182 count >>= 1;
183 count--;
184
185 devc->irq_mode = IMODE_OUTPUT;
186
187 spin_lock_irqsave(&devc->lock, flags);
188 if (sb_dsp_command(devc, 0x14)) /* 8 bit DAC using DMA */
189 {
190 sb_dsp_command(devc, (unsigned char) (count & 0xff));
191 sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
192 }
193 else
194 printk(KERN_WARNING "Sound Blaster: unable to start DAC.\n");
195 spin_unlock_irqrestore(&devc->lock, flags);
196 devc->intr_active = 1;
197 }
198
199 static void sb1_audio_start_input(int dev, unsigned long buf, int nr_bytes, int intrflag)
200 {
201 unsigned long flags;
202 int count = nr_bytes;
203 sb_devc *devc = audio_devs[dev]->devc;
204
205 /*
206 * Start a DMA input to the buffer pointed by dmaqtail
207 */
208
209 /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
210
211 if (audio_devs[dev]->dmap_out->dma > 3)
212 count >>= 1;
213 count--;
214
215 devc->irq_mode = IMODE_INPUT;
216
217 spin_lock_irqsave(&devc->lock, flags);
218 if (sb_dsp_command(devc, 0x24)) /* 8 bit ADC using DMA */
219 {
220 sb_dsp_command(devc, (unsigned char) (count & 0xff));
221 sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
222 }
223 else
224 printk(KERN_ERR "Sound Blaster: unable to start ADC.\n");
225 spin_unlock_irqrestore(&devc->lock, flags);
226
227 devc->intr_active = 1;
228 }
229
230 static void sb1_audio_trigger(int dev, int bits)
231 {
232 sb_devc *devc = audio_devs[dev]->devc;
233
234 bits &= devc->irq_mode;
235
236 if (!bits)
237 sb_dsp_command(devc, 0xd0); /* Halt DMA */
238 else
239 {
240 switch (devc->irq_mode)
241 {
242 case IMODE_INPUT:
243 sb1_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
244 devc->trg_intrflag);
245 break;
246
247 case IMODE_OUTPUT:
248 sb1_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
249 devc->trg_intrflag);
250 break;
251 }
252 }
253 devc->trigger_bits = bits;
254 }
255
256 static int sb1_audio_prepare_for_input(int dev, int bsize, int bcount)
257 {
258 sb_devc *devc = audio_devs[dev]->devc;
259 unsigned long flags;
260
261 spin_lock_irqsave(&devc->lock, flags);
262 if (sb_dsp_command(devc, 0x40))
263 sb_dsp_command(devc, devc->tconst);
264 sb_dsp_command(devc, DSP_CMD_SPKOFF);
265 spin_unlock_irqrestore(&devc->lock, flags);
266
267 devc->trigger_bits = 0;
268 return 0;
269 }
270
271 static int sb1_audio_prepare_for_output(int dev, int bsize, int bcount)
272 {
273 sb_devc *devc = audio_devs[dev]->devc;
274 unsigned long flags;
275
276 spin_lock_irqsave(&devc->lock, flags);
277 if (sb_dsp_command(devc, 0x40))
278 sb_dsp_command(devc, devc->tconst);
279 sb_dsp_command(devc, DSP_CMD_SPKON);
280 spin_unlock_irqrestore(&devc->lock, flags);
281 devc->trigger_bits = 0;
282 return 0;
283 }
284
285 static int sb1_audio_set_speed(int dev, int speed)
286 {
287 int max_speed = 23000;
288 sb_devc *devc = audio_devs[dev]->devc;
289 int tmp;
290
291 if (devc->opened & OPEN_READ)
292 max_speed = 13000;
293
294 if (speed > 0)
295 {
296 if (speed < 4000)
297 speed = 4000;
298
299 if (speed > max_speed)
300 speed = max_speed;
301
302 devc->tconst = (256 - ((1000000 + speed / 2) / speed)) & 0xff;
303 tmp = 256 - devc->tconst;
304 speed = (1000000 + tmp / 2) / tmp;
305
306 devc->speed = speed;
307 }
308 return devc->speed;
309 }
310
311 static short sb1_audio_set_channels(int dev, short channels)
312 {
313 sb_devc *devc = audio_devs[dev]->devc;
314 return devc->channels = 1;
315 }
316
317 static unsigned int sb1_audio_set_bits(int dev, unsigned int bits)
318 {
319 sb_devc *devc = audio_devs[dev]->devc;
320 return devc->bits = 8;
321 }
322
323 static void sb1_audio_halt_xfer(int dev)
324 {
325 unsigned long flags;
326 sb_devc *devc = audio_devs[dev]->devc;
327
328 spin_lock_irqsave(&devc->lock, flags);
329 sb_dsp_reset(devc);
330 spin_unlock_irqrestore(&devc->lock, flags);
331 }
332
333 /*
334 * SB 2.0 and SB 2.01 compatible routines
335 */
336
337 static void sb20_audio_output_block(int dev, unsigned long buf, int nr_bytes,
338 int intrflag)
339 {
340 unsigned long flags;
341 int count = nr_bytes;
342 sb_devc *devc = audio_devs[dev]->devc;
343 unsigned char cmd;
344
345 /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
346
347 if (audio_devs[dev]->dmap_out->dma > 3)
348 count >>= 1;
349 count--;
350
351 devc->irq_mode = IMODE_OUTPUT;
352
353 spin_lock_irqsave(&devc->lock, flags);
354 if (sb_dsp_command(devc, 0x48)) /* DSP Block size */
355 {
356 sb_dsp_command(devc, (unsigned char) (count & 0xff));
357 sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
358
359 if (devc->speed * devc->channels <= 23000)
360 cmd = 0x1c; /* 8 bit PCM output */
361 else
362 cmd = 0x90; /* 8 bit high speed PCM output (SB2.01/Pro) */
363
364 if (!sb_dsp_command(devc, cmd))
365 printk(KERN_ERR "Sound Blaster: unable to start DAC.\n");
366 }
367 else
368 printk(KERN_ERR "Sound Blaster: unable to start DAC.\n");
369 spin_unlock_irqrestore(&devc->lock, flags);
370 devc->intr_active = 1;
371 }
372
373 static void sb20_audio_start_input(int dev, unsigned long buf, int nr_bytes, int intrflag)
374 {
375 unsigned long flags;
376 int count = nr_bytes;
377 sb_devc *devc = audio_devs[dev]->devc;
378 unsigned char cmd;
379
380 /*
381 * Start a DMA input to the buffer pointed by dmaqtail
382 */
383
384 /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
385
386 if (audio_devs[dev]->dmap_out->dma > 3)
387 count >>= 1;
388 count--;
389
390 devc->irq_mode = IMODE_INPUT;
391
392 spin_lock_irqsave(&devc->lock, flags);
393 if (sb_dsp_command(devc, 0x48)) /* DSP Block size */
394 {
395 sb_dsp_command(devc, (unsigned char) (count & 0xff));
396 sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
397
398 if (devc->speed * devc->channels <= (devc->major == 3 ? 23000 : 13000))
399 cmd = 0x2c; /* 8 bit PCM input */
400 else
401 cmd = 0x98; /* 8 bit high speed PCM input (SB2.01/Pro) */
402
403 if (!sb_dsp_command(devc, cmd))
404 printk(KERN_ERR "Sound Blaster: unable to start ADC.\n");
405 }
406 else
407 printk(KERN_ERR "Sound Blaster: unable to start ADC.\n");
408 spin_unlock_irqrestore(&devc->lock, flags);
409 devc->intr_active = 1;
410 }
411
412 static void sb20_audio_trigger(int dev, int bits)
413 {
414 sb_devc *devc = audio_devs[dev]->devc;
415 bits &= devc->irq_mode;
416
417 if (!bits)
418 sb_dsp_command(devc, 0xd0); /* Halt DMA */
419 else
420 {
421 switch (devc->irq_mode)
422 {
423 case IMODE_INPUT:
424 sb20_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
425 devc->trg_intrflag);
426 break;
427
428 case IMODE_OUTPUT:
429 sb20_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
430 devc->trg_intrflag);
431 break;
432 }
433 }
434 devc->trigger_bits = bits;
435 }
436
437 /*
438 * SB2.01 specific speed setup
439 */
440
441 static int sb201_audio_set_speed(int dev, int speed)
442 {
443 sb_devc *devc = audio_devs[dev]->devc;
444 int tmp;
445 int s = speed * devc->channels;
446
447 if (speed > 0)
448 {
449 if (speed < 4000)
450 speed = 4000;
451 if (speed > 44100)
452 speed = 44100;
453 if (devc->opened & OPEN_READ && speed > 15000)
454 speed = 15000;
455 devc->tconst = (256 - ((1000000 + s / 2) / s)) & 0xff;
456 tmp = 256 - devc->tconst;
457 speed = ((1000000 + tmp / 2) / tmp) / devc->channels;
458
459 devc->speed = speed;
460 }
461 return devc->speed;
462 }
463
464 /*
465 * SB Pro specific routines
466 */
467
468 static int sbpro_audio_prepare_for_input(int dev, int bsize, int bcount)
469 { /* For SB Pro and Jazz16 */
470 sb_devc *devc = audio_devs[dev]->devc;
471 unsigned long flags;
472 unsigned char bits = 0;
473
474 if (devc->dma16 >= 0 && devc->dma16 != devc->dma8)
475 audio_devs[dev]->dmap_out->dma = audio_devs[dev]->dmap_in->dma =
476 devc->bits == 16 ? devc->dma16 : devc->dma8;
477
478 if (devc->model == MDL_JAZZ || devc->model == MDL_SMW)
479 if (devc->bits == AFMT_S16_LE)
480 bits = 0x04; /* 16 bit mode */
481
482 spin_lock_irqsave(&devc->lock, flags);
483 if (sb_dsp_command(devc, 0x40))
484 sb_dsp_command(devc, devc->tconst);
485 sb_dsp_command(devc, DSP_CMD_SPKOFF);
486 if (devc->channels == 1)
487 sb_dsp_command(devc, 0xa0 | bits); /* Mono input */
488 else
489 sb_dsp_command(devc, 0xa8 | bits); /* Stereo input */
490 spin_unlock_irqrestore(&devc->lock, flags);
491
492 devc->trigger_bits = 0;
493 return 0;
494 }
495
496 static int sbpro_audio_prepare_for_output(int dev, int bsize, int bcount)
497 { /* For SB Pro and Jazz16 */
498 sb_devc *devc = audio_devs[dev]->devc;
499 unsigned long flags;
500 unsigned char tmp;
501 unsigned char bits = 0;
502
503 if (devc->dma16 >= 0 && devc->dma16 != devc->dma8)
504 audio_devs[dev]->dmap_out->dma = audio_devs[dev]->dmap_in->dma = devc->bits == 16 ? devc->dma16 : devc->dma8;
505 if (devc->model == MDL_SBPRO)
506 sb_mixer_set_stereo(devc, devc->channels == 2);
507
508 spin_lock_irqsave(&devc->lock, flags);
509 if (sb_dsp_command(devc, 0x40))
510 sb_dsp_command(devc, devc->tconst);
511 sb_dsp_command(devc, DSP_CMD_SPKON);
512
513 if (devc->model == MDL_JAZZ || devc->model == MDL_SMW)
514 {
515 if (devc->bits == AFMT_S16_LE)
516 bits = 0x04; /* 16 bit mode */
517
518 if (devc->channels == 1)
519 sb_dsp_command(devc, 0xa0 | bits); /* Mono output */
520 else
521 sb_dsp_command(devc, 0xa8 | bits); /* Stereo output */
522 }
523 else
524 {
525 tmp = sb_getmixer(devc, 0x0e);
526 if (devc->channels == 1)
527 tmp &= ~0x02;
528 else
529 tmp |= 0x02;
530 sb_setmixer(devc, 0x0e, tmp);
531 }
532 spin_unlock_irqrestore(&devc->lock, flags);
533 devc->trigger_bits = 0;
534 return 0;
535 }
536
537 static int sbpro_audio_set_speed(int dev, int speed)
538 {
539 sb_devc *devc = audio_devs[dev]->devc;
540
541 if (speed > 0)
542 {
543 if (speed < 4000)
544 speed = 4000;
545 if (speed > 44100)
546 speed = 44100;
547 if (devc->channels > 1 && speed > 22050)
548 speed = 22050;
549 sb201_audio_set_speed(dev, speed);
550 }
551 return devc->speed;
552 }
553
554 static short sbpro_audio_set_channels(int dev, short channels)
555 {
556 sb_devc *devc = audio_devs[dev]->devc;
557
558 if (channels == 1 || channels == 2)
559 {
560 if (channels != devc->channels)
561 {
562 devc->channels = channels;
563 if (devc->model == MDL_SBPRO && devc->channels == 2)
564 sbpro_audio_set_speed(dev, devc->speed);
565 }
566 }
567 return devc->channels;
568 }
569
570 static int jazz16_audio_set_speed(int dev, int speed)
571 {
572 sb_devc *devc = audio_devs[dev]->devc;
573
574 if (speed > 0)
575 {
576 int tmp;
577 int s = speed * devc->channels;
578
579 if (speed < 5000)
580 speed = 5000;
581 if (speed > 44100)
582 speed = 44100;
583
584 devc->tconst = (256 - ((1000000 + s / 2) / s)) & 0xff;
585
586 tmp = 256 - devc->tconst;
587 speed = ((1000000 + tmp / 2) / tmp) / devc->channels;
588
589 devc->speed = speed;
590 }
591 return devc->speed;
592 }
593
594 /*
595 * SB16 specific routines
596 */
597
598 static int sb16_audio_set_speed(int dev, int speed)
599 {
600 sb_devc *devc = audio_devs[dev]->devc;
601 int max_speed = devc->submodel == SUBMDL_ALS100 ? 48000 : 44100;
602
603 if (speed > 0)
604 {
605 if (speed < 5000) /* which of these */
606 speed = 4000; /* is correct ??? */
607
608 if (speed > max_speed)
609 speed = max_speed;
610
611 devc->speed = speed;
612 }
613 return devc->speed;
614 }
615
616 static unsigned int sb16_audio_set_bits(int dev, unsigned int bits)
617 {
618 sb_devc *devc = audio_devs[dev]->devc;
619
620 if (bits != 0)
621 {
622 if (bits == AFMT_U8 || bits == AFMT_S16_LE)
623 devc->bits = bits;
624 else
625 devc->bits = AFMT_U8;
626 }
627
628 return devc->bits;
629 }
630
631 static int sb16_audio_prepare_for_input(int dev, int bsize, int bcount)
632 {
633 sb_devc *devc = audio_devs[dev]->devc;
634
635 if (!devc->fullduplex)
636 {
637 audio_devs[dev]->dmap_out->dma =
638 audio_devs[dev]->dmap_in->dma =
639 devc->bits == AFMT_S16_LE ?
640 devc->dma16 : devc->dma8;
641 }
642 else if (devc->bits == AFMT_S16_LE)
643 {
644 audio_devs[dev]->dmap_out->dma = devc->dma8;
645 audio_devs[dev]->dmap_in->dma = devc->dma16;
646 }
647 else
648 {
649 audio_devs[dev]->dmap_out->dma = devc->dma16;
650 audio_devs[dev]->dmap_in->dma = devc->dma8;
651 }
652
653 devc->trigger_bits = 0;
654 return 0;
655 }
656
657 static int sb16_audio_prepare_for_output(int dev, int bsize, int bcount)
658 {
659 sb_devc *devc = audio_devs[dev]->devc;
660
661 if (!devc->fullduplex)
662 {
663 audio_devs[dev]->dmap_out->dma =
664 audio_devs[dev]->dmap_in->dma =
665 devc->bits == AFMT_S16_LE ?
666 devc->dma16 : devc->dma8;
667 }
668 else if (devc->bits == AFMT_S16_LE)
669 {
670 audio_devs[dev]->dmap_out->dma = devc->dma8;
671 audio_devs[dev]->dmap_in->dma = devc->dma16;
672 }
673 else
674 {
675 audio_devs[dev]->dmap_out->dma = devc->dma16;
676 audio_devs[dev]->dmap_in->dma = devc->dma8;
677 }
678
679 devc->trigger_bits = 0;
680 return 0;
681 }
682
683 static void sb16_audio_output_block(int dev, unsigned long buf, int count,
684 int intrflag)
685 {
686 unsigned long flags, cnt;
687 sb_devc *devc = audio_devs[dev]->devc;
688 unsigned long bits;
689
690 if (!devc->fullduplex || devc->bits == AFMT_S16_LE)
691 {
692 devc->irq_mode = IMODE_OUTPUT;
693 devc->intr_active = 1;
694 }
695 else
696 {
697 devc->irq_mode_16 = IMODE_OUTPUT;
698 devc->intr_active_16 = 1;
699 }
700
701 /* save value */
702 spin_lock_irqsave(&devc->lock, flags);
703 bits = devc->bits;
704 if (devc->fullduplex)
705 devc->bits = (devc->bits == AFMT_S16_LE) ?
706 AFMT_U8 : AFMT_S16_LE;
707 spin_unlock_irqrestore(&devc->lock, flags);
708
709 cnt = count;
710 if (devc->bits == AFMT_S16_LE)
711 cnt >>= 1;
712 cnt--;
713
714 spin_lock_irqsave(&devc->lock, flags);
715
716 /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
717
718 sb_dsp_command(devc, 0x41);
719 sb_dsp_command(devc, (unsigned char) ((devc->speed >> 8) & 0xff));
720 sb_dsp_command(devc, (unsigned char) (devc->speed & 0xff));
721
722 sb_dsp_command(devc, (devc->bits == AFMT_S16_LE ? 0xb6 : 0xc6));
723 sb_dsp_command(devc, ((devc->channels == 2 ? 0x20 : 0) +
724 (devc->bits == AFMT_S16_LE ? 0x10 : 0)));
725 sb_dsp_command(devc, (unsigned char) (cnt & 0xff));
726 sb_dsp_command(devc, (unsigned char) (cnt >> 8));
727
728 /* restore real value after all programming */
729 devc->bits = bits;
730 spin_unlock_irqrestore(&devc->lock, flags);
731 }
732
733
734 /*
735 * This fails on the Cyrix MediaGX. If you don't have the DMA enabled
736 * before the first sample arrives it locks up. However even if you
737 * do enable the DMA in time you just get DMA timeouts and missing
738 * interrupts and stuff, so for now I've not bothered fixing this either.
739 */
740
741 static void sb16_audio_start_input(int dev, unsigned long buf, int count, int intrflag)
742 {
743 unsigned long flags, cnt;
744 sb_devc *devc = audio_devs[dev]->devc;
745
746 if (!devc->fullduplex || devc->bits != AFMT_S16_LE)
747 {
748 devc->irq_mode = IMODE_INPUT;
749 devc->intr_active = 1;
750 }
751 else
752 {
753 devc->irq_mode_16 = IMODE_INPUT;
754 devc->intr_active_16 = 1;
755 }
756
757 cnt = count;
758 if (devc->bits == AFMT_S16_LE)
759 cnt >>= 1;
760 cnt--;
761
762 spin_lock_irqsave(&devc->lock, flags);
763
764 /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
765
766 sb_dsp_command(devc, 0x42);
767 sb_dsp_command(devc, (unsigned char) ((devc->speed >> 8) & 0xff));
768 sb_dsp_command(devc, (unsigned char) (devc->speed & 0xff));
769
770 sb_dsp_command(devc, (devc->bits == AFMT_S16_LE ? 0xbe : 0xce));
771 sb_dsp_command(devc, ((devc->channels == 2 ? 0x20 : 0) +
772 (devc->bits == AFMT_S16_LE ? 0x10 : 0)));
773 sb_dsp_command(devc, (unsigned char) (cnt & 0xff));
774 sb_dsp_command(devc, (unsigned char) (cnt >> 8));
775
776 spin_unlock_irqrestore(&devc->lock, flags);
777 }
778
779 static void sb16_audio_trigger(int dev, int bits)
780 {
781 sb_devc *devc = audio_devs[dev]->devc;
782
783 int bits_16 = bits & devc->irq_mode_16;
784 bits &= devc->irq_mode;
785
786 if (!bits && !bits_16)
787 sb_dsp_command(devc, 0xd0); /* Halt DMA */
788 else
789 {
790 if (bits)
791 {
792 switch (devc->irq_mode)
793 {
794 case IMODE_INPUT:
795 sb16_audio_start_input(dev,
796 devc->trg_buf,
797 devc->trg_bytes,
798 devc->trg_intrflag);
799 break;
800
801 case IMODE_OUTPUT:
802 sb16_audio_output_block(dev,
803 devc->trg_buf,
804 devc->trg_bytes,
805 devc->trg_intrflag);
806 break;
807 }
808 }
809 if (bits_16)
810 {
811 switch (devc->irq_mode_16)
812 {
813 case IMODE_INPUT:
814 sb16_audio_start_input(dev,
815 devc->trg_buf_16,
816 devc->trg_bytes_16,
817 devc->trg_intrflag_16);
818 break;
819
820 case IMODE_OUTPUT:
821 sb16_audio_output_block(dev,
822 devc->trg_buf_16,
823 devc->trg_bytes_16,
824 devc->trg_intrflag_16);
825 break;
826 }
827 }
828 }
829
830 devc->trigger_bits = bits | bits_16;
831 }
832
833 static unsigned char lbuf8[2048];
834 static signed short *lbuf16 = (signed short *)lbuf8;
835 #define LBUFCOPYSIZE 1024
836 static void
837 sb16_copy_from_user(int dev,
838 char *localbuf, int localoffs,
839 const char *userbuf, int useroffs,
840 int max_in, int max_out,
841 int *used, int *returned,
842 int len)
843 {
844 sb_devc *devc = audio_devs[dev]->devc;
845 int i, c, p, locallen;
846 unsigned char *buf8;
847 signed short *buf16;
848
849 /* if not duplex no conversion */
850 if (!devc->fullduplex)
851 {
852 copy_from_user (localbuf + localoffs, userbuf + useroffs, len);
853 *used = len;
854 *returned = len;
855 }
856 else if (devc->bits == AFMT_S16_LE)
857 {
858 /* 16 -> 8 */
859 /* max_in >> 1, max number of samples in ( 16 bits ) */
860 /* max_out, max number of samples out ( 8 bits ) */
861 /* len, number of samples that will be taken ( 16 bits )*/
862 /* c, count of samples remaining in buffer ( 16 bits )*/
863 /* p, count of samples already processed ( 16 bits )*/
864 len = ( (max_in >> 1) > max_out) ? max_out : (max_in >> 1);
865 c = len;
866 p = 0;
867 buf8 = (unsigned char *)(localbuf + localoffs);
868 while (c)
869 {
870 locallen = (c >= LBUFCOPYSIZE ? LBUFCOPYSIZE : c);
871 /* << 1 in order to get 16 bit samples */
872 copy_from_user (lbuf16,
873 userbuf+useroffs + (p << 1),
874 locallen << 1);
875 for (i = 0; i < locallen; i++)
876 {
877 buf8[p+i] = ~((lbuf16[i] >> 8) & 0xff) ^ 0x80;
878 }
879 c -= locallen; p += locallen;
880 }
881 /* used = ( samples * 16 bits size ) */
882 *used = len << 1;
883 /* returned = ( samples * 8 bits size ) */
884 *returned = len;
885 }
886 else
887 {
888 /* 8 -> 16 */
889 /* max_in, max number of samples in ( 8 bits ) */
890 /* max_out >> 1, max number of samples out ( 16 bits ) */
891 /* len, number of samples that will be taken ( 8 bits )*/
892 /* c, count of samples remaining in buffer ( 8 bits )*/
893 /* p, count of samples already processed ( 8 bits )*/
894 len = max_in > (max_out >> 1) ? (max_out >> 1) : max_in;
895 c = len;
896 p = 0;
897 buf16 = (signed short *)(localbuf + localoffs);
898 while (c)
899 {
900 locallen = (c >= LBUFCOPYSIZE ? LBUFCOPYSIZE : c);
901 copy_from_user (lbuf8,
902 userbuf+useroffs + p,
903 locallen);
904 for (i = 0; i < locallen; i++)
905 {
906 buf16[p+i] = (~lbuf8[i] ^ 0x80) << 8;
907 }
908 c -= locallen; p += locallen;
909 }
910 /* used = ( samples * 8 bits size ) */
911 *used = len;
912 /* returned = ( samples * 16 bits size ) */
913 *returned = len << 1;
914 }
915 }
916
917 static void
918 sb16_audio_mmap(int dev)
919 {
920 sb_devc *devc = audio_devs[dev]->devc;
921 devc->fullduplex = 0;
922 }
923
924 static struct audio_driver sb1_audio_driver = /* SB1.x */
925 {
926 owner: THIS_MODULE,
927 open: sb_audio_open,
928 close: sb_audio_close,
929 output_block: sb_set_output_parms,
930 start_input: sb_set_input_parms,
931 prepare_for_input: sb1_audio_prepare_for_input,
932 prepare_for_output: sb1_audio_prepare_for_output,
933 halt_io: sb1_audio_halt_xfer,
934 trigger: sb1_audio_trigger,
935 set_speed: sb1_audio_set_speed,
936 set_bits: sb1_audio_set_bits,
937 set_channels: sb1_audio_set_channels
938 };
939
940 static struct audio_driver sb20_audio_driver = /* SB2.0 */
941 {
942 owner: THIS_MODULE,
943 open: sb_audio_open,
944 close: sb_audio_close,
945 output_block: sb_set_output_parms,
946 start_input: sb_set_input_parms,
947 prepare_for_input: sb1_audio_prepare_for_input,
948 prepare_for_output: sb1_audio_prepare_for_output,
949 halt_io: sb1_audio_halt_xfer,
950 trigger: sb20_audio_trigger,
951 set_speed: sb1_audio_set_speed,
952 set_bits: sb1_audio_set_bits,
953 set_channels: sb1_audio_set_channels
954 };
955
956 static struct audio_driver sb201_audio_driver = /* SB2.01 */
957 {
958 owner: THIS_MODULE,
959 open: sb_audio_open,
960 close: sb_audio_close,
961 output_block: sb_set_output_parms,
962 start_input: sb_set_input_parms,
963 prepare_for_input: sb1_audio_prepare_for_input,
964 prepare_for_output: sb1_audio_prepare_for_output,
965 halt_io: sb1_audio_halt_xfer,
966 trigger: sb20_audio_trigger,
967 set_speed: sb201_audio_set_speed,
968 set_bits: sb1_audio_set_bits,
969 set_channels: sb1_audio_set_channels
970 };
971
972 static struct audio_driver sbpro_audio_driver = /* SB Pro */
973 {
974 owner: THIS_MODULE,
975 open: sb_audio_open,
976 close: sb_audio_close,
977 output_block: sb_set_output_parms,
978 start_input: sb_set_input_parms,
979 prepare_for_input: sbpro_audio_prepare_for_input,
980 prepare_for_output: sbpro_audio_prepare_for_output,
981 halt_io: sb1_audio_halt_xfer,
982 trigger: sb20_audio_trigger,
983 set_speed: sbpro_audio_set_speed,
984 set_bits: sb1_audio_set_bits,
985 set_channels: sbpro_audio_set_channels
986 };
987
988 static struct audio_driver jazz16_audio_driver = /* Jazz16 and SM Wave */
989 {
990 owner: THIS_MODULE,
991 open: sb_audio_open,
992 close: sb_audio_close,
993 output_block: sb_set_output_parms,
994 start_input: sb_set_input_parms,
995 prepare_for_input: sbpro_audio_prepare_for_input,
996 prepare_for_output: sbpro_audio_prepare_for_output,
997 halt_io: sb1_audio_halt_xfer,
998 trigger: sb20_audio_trigger,
999 set_speed: jazz16_audio_set_speed,
1000 set_bits: sb16_audio_set_bits,
1001 set_channels: sbpro_audio_set_channels
1002 };
1003
1004 static struct audio_driver sb16_audio_driver = /* SB16 */
1005 {
1006 owner: THIS_MODULE,
1007 open: sb_audio_open,
1008 close: sb_audio_close,
1009 output_block: sb_set_output_parms,
1010 start_input: sb_set_input_parms,
1011 prepare_for_input: sb16_audio_prepare_for_input,
1012 prepare_for_output: sb16_audio_prepare_for_output,
1013 halt_io: sb1_audio_halt_xfer,
1014 copy_user: sb16_copy_from_user,
1015 trigger: sb16_audio_trigger,
1016 set_speed: sb16_audio_set_speed,
1017 set_bits: sb16_audio_set_bits,
1018 set_channels: sbpro_audio_set_channels,
1019 mmap: sb16_audio_mmap
1020 };
1021
1022 void sb_audio_init(sb_devc * devc, char *name, struct module *owner)
1023 {
1024 int audio_flags = 0;
1025 int format_mask = AFMT_U8;
1026
1027 struct audio_driver *driver = &sb1_audio_driver;
1028
1029 switch (devc->model)
1030 {
1031 case MDL_SB1: /* SB1.0 or SB 1.5 */
1032 DDB(printk("Will use standard SB1.x driver\n"));
1033 audio_flags = DMA_HARDSTOP;
1034 break;
1035
1036 case MDL_SB2:
1037 DDB(printk("Will use SB2.0 driver\n"));
1038 audio_flags = DMA_AUTOMODE;
1039 driver = &sb20_audio_driver;
1040 break;
1041
1042 case MDL_SB201:
1043 DDB(printk("Will use SB2.01 (high speed) driver\n"));
1044 audio_flags = DMA_AUTOMODE;
1045 driver = &sb201_audio_driver;
1046 break;
1047
1048 case MDL_JAZZ:
1049 case MDL_SMW:
1050 DDB(printk("Will use Jazz16 driver\n"));
1051 audio_flags = DMA_AUTOMODE;
1052 format_mask |= AFMT_S16_LE;
1053 driver = &jazz16_audio_driver;
1054 break;
1055
1056 case MDL_ESS:
1057 DDB(printk("Will use ESS ES688/1688 driver\n"));
1058 driver = ess_audio_init (devc, &audio_flags, &format_mask);
1059 break;
1060
1061 case MDL_SB16:
1062 DDB(printk("Will use SB16 driver\n"));
1063 audio_flags = DMA_AUTOMODE;
1064 format_mask |= AFMT_S16_LE;
1065 if (devc->dma8 != devc->dma16 && devc->dma16 != -1)
1066 {
1067 audio_flags |= DMA_DUPLEX;
1068 devc->duplex = 1;
1069 }
1070 driver = &sb16_audio_driver;
1071 break;
1072
1073 default:
1074 DDB(printk("Will use SB Pro driver\n"));
1075 audio_flags = DMA_AUTOMODE;
1076 driver = &sbpro_audio_driver;
1077 }
1078
1079 if (owner)
1080 driver->owner = owner;
1081
1082 if ((devc->dev = sound_install_audiodrv(AUDIO_DRIVER_VERSION,
1083 name,driver, sizeof(struct audio_driver),
1084 audio_flags, format_mask, devc,
1085 devc->dma8,
1086 devc->duplex ? devc->dma16 : devc->dma8)) < 0)
1087 {
1088 printk(KERN_ERR "Sound Blaster: unable to install audio.\n");
1089 return;
1090 }
1091 audio_devs[devc->dev]->mixer_dev = devc->my_mixerdev;
1092 audio_devs[devc->dev]->min_fragment = 5;
1093 }
1094