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1/*
2 * sound/oss/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
34int 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
97void 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
128static 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
149static 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
173static 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
199static 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
230static 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
256static 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
271static 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
285static 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
311static 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
317static 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
323static 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
337static 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
373static 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
412static 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
441static int sb201_audio_set_speed(int dev, int speed)
442{
443 sb_devc *devc = audio_devs[dev]->devc;
444 int tmp;
445 int s;
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 s = speed * devc->channels;
456 devc->tconst = (256 - ((1000000 + s / 2) / s)) & 0xff;
457 tmp = 256 - devc->tconst;
458 speed = ((1000000 + tmp / 2) / tmp) / devc->channels;
459
460 devc->speed = speed;
461 }
462 return devc->speed;
463}
464
465/*
466 * SB Pro specific routines
467 */
468
469static int sbpro_audio_prepare_for_input(int dev, int bsize, int bcount)
470{ /* For SB Pro and Jazz16 */
471 sb_devc *devc = audio_devs[dev]->devc;
472 unsigned long flags;
473 unsigned char bits = 0;
474
475 if (devc->dma16 >= 0 && devc->dma16 != devc->dma8)
476 audio_devs[dev]->dmap_out->dma = audio_devs[dev]->dmap_in->dma =
477 devc->bits == 16 ? devc->dma16 : devc->dma8;
478
479 if (devc->model == MDL_JAZZ || devc->model == MDL_SMW)
480 if (devc->bits == AFMT_S16_LE)
481 bits = 0x04; /* 16 bit mode */
482
483 spin_lock_irqsave(&devc->lock, flags);
484 if (sb_dsp_command(devc, 0x40))
485 sb_dsp_command(devc, devc->tconst);
486 sb_dsp_command(devc, DSP_CMD_SPKOFF);
487 if (devc->channels == 1)
488 sb_dsp_command(devc, 0xa0 | bits); /* Mono input */
489 else
490 sb_dsp_command(devc, 0xa8 | bits); /* Stereo input */
491 spin_unlock_irqrestore(&devc->lock, flags);
492
493 devc->trigger_bits = 0;
494 return 0;
495}
496
497static int sbpro_audio_prepare_for_output(int dev, int bsize, int bcount)
498{ /* For SB Pro and Jazz16 */
499 sb_devc *devc = audio_devs[dev]->devc;
500 unsigned long flags;
501 unsigned char tmp;
502 unsigned char bits = 0;
503
504 if (devc->dma16 >= 0 && devc->dma16 != devc->dma8)
505 audio_devs[dev]->dmap_out->dma = audio_devs[dev]->dmap_in->dma = devc->bits == 16 ? devc->dma16 : devc->dma8;
506 if (devc->model == MDL_SBPRO)
507 sb_mixer_set_stereo(devc, devc->channels == 2);
508
509 spin_lock_irqsave(&devc->lock, flags);
510 if (sb_dsp_command(devc, 0x40))
511 sb_dsp_command(devc, devc->tconst);
512 sb_dsp_command(devc, DSP_CMD_SPKON);
513
514 if (devc->model == MDL_JAZZ || devc->model == MDL_SMW)
515 {
516 if (devc->bits == AFMT_S16_LE)
517 bits = 0x04; /* 16 bit mode */
518
519 if (devc->channels == 1)
520 sb_dsp_command(devc, 0xa0 | bits); /* Mono output */
521 else
522 sb_dsp_command(devc, 0xa8 | bits); /* Stereo output */
523 spin_unlock_irqrestore(&devc->lock, flags);
524 }
525 else
526 {
527 spin_unlock_irqrestore(&devc->lock, flags);
528 tmp = sb_getmixer(devc, 0x0e);
529 if (devc->channels == 1)
530 tmp &= ~0x02;
531 else
532 tmp |= 0x02;
533 sb_setmixer(devc, 0x0e, tmp);
534 }
535 devc->trigger_bits = 0;
536 return 0;
537}
538
539static int sbpro_audio_set_speed(int dev, int speed)
540{
541 sb_devc *devc = audio_devs[dev]->devc;
542
543 if (speed > 0)
544 {
545 if (speed < 4000)
546 speed = 4000;
547 if (speed > 44100)
548 speed = 44100;
549 if (devc->channels > 1 && speed > 22050)
550 speed = 22050;
551 sb201_audio_set_speed(dev, speed);
552 }
553 return devc->speed;
554}
555
556static short sbpro_audio_set_channels(int dev, short channels)
557{
558 sb_devc *devc = audio_devs[dev]->devc;
559
560 if (channels == 1 || channels == 2)
561 {
562 if (channels != devc->channels)
563 {
564 devc->channels = channels;
565 if (devc->model == MDL_SBPRO && devc->channels == 2)
566 sbpro_audio_set_speed(dev, devc->speed);
567 }
568 }
569 return devc->channels;
570}
571
572static int jazz16_audio_set_speed(int dev, int speed)
573{
574 sb_devc *devc = audio_devs[dev]->devc;
575
576 if (speed > 0)
577 {
578 int tmp;
579 int s;
580
581 if (speed < 5000)
582 speed = 5000;
583 if (speed > 44100)
584 speed = 44100;
585
586 s = speed * devc->channels;
587
588 devc->tconst = (256 - ((1000000 + s / 2) / s)) & 0xff;
589
590 tmp = 256 - devc->tconst;
591 speed = ((1000000 + tmp / 2) / tmp) / devc->channels;
592
593 devc->speed = speed;
594 }
595 return devc->speed;
596}
597
598/*
599 * SB16 specific routines
600 */
601
602static int sb16_audio_set_speed(int dev, int speed)
603{
604 sb_devc *devc = audio_devs[dev]->devc;
605 int max_speed = devc->submodel == SUBMDL_ALS100 ? 48000 : 44100;
606
607 if (speed > 0)
608 {
609 if (speed < 5000)
610 speed = 5000;
611
612 if (speed > max_speed)
613 speed = max_speed;
614
615 devc->speed = speed;
616 }
617 return devc->speed;
618}
619
620static unsigned int sb16_audio_set_bits(int dev, unsigned int bits)
621{
622 sb_devc *devc = audio_devs[dev]->devc;
623
624 if (bits != 0)
625 {
626 if (bits == AFMT_U8 || bits == AFMT_S16_LE)
627 devc->bits = bits;
628 else
629 devc->bits = AFMT_U8;
630 }
631
632 return devc->bits;
633}
634
635static int sb16_audio_prepare_for_input(int dev, int bsize, int bcount)
636{
637 sb_devc *devc = audio_devs[dev]->devc;
638
639 if (!devc->fullduplex)
640 {
641 audio_devs[dev]->dmap_out->dma =
642 audio_devs[dev]->dmap_in->dma =
643 devc->bits == AFMT_S16_LE ?
644 devc->dma16 : devc->dma8;
645 }
646 else if (devc->bits == AFMT_S16_LE)
647 {
648 audio_devs[dev]->dmap_out->dma = devc->dma8;
649 audio_devs[dev]->dmap_in->dma = devc->dma16;
650 }
651 else
652 {
653 audio_devs[dev]->dmap_out->dma = devc->dma16;
654 audio_devs[dev]->dmap_in->dma = devc->dma8;
655 }
656
657 devc->trigger_bits = 0;
658 return 0;
659}
660
661static int sb16_audio_prepare_for_output(int dev, int bsize, int bcount)
662{
663 sb_devc *devc = audio_devs[dev]->devc;
664
665 if (!devc->fullduplex)
666 {
667 audio_devs[dev]->dmap_out->dma =
668 audio_devs[dev]->dmap_in->dma =
669 devc->bits == AFMT_S16_LE ?
670 devc->dma16 : devc->dma8;
671 }
672 else if (devc->bits == AFMT_S16_LE)
673 {
674 audio_devs[dev]->dmap_out->dma = devc->dma8;
675 audio_devs[dev]->dmap_in->dma = devc->dma16;
676 }
677 else
678 {
679 audio_devs[dev]->dmap_out->dma = devc->dma16;
680 audio_devs[dev]->dmap_in->dma = devc->dma8;
681 }
682
683 devc->trigger_bits = 0;
684 return 0;
685}
686
687static void sb16_audio_output_block(int dev, unsigned long buf, int count,
688 int intrflag)
689{
690 unsigned long flags, cnt;
691 sb_devc *devc = audio_devs[dev]->devc;
692 unsigned long bits;
693
694 if (!devc->fullduplex || devc->bits == AFMT_S16_LE)
695 {
696 devc->irq_mode = IMODE_OUTPUT;
697 devc->intr_active = 1;
698 }
699 else
700 {
701 devc->irq_mode_16 = IMODE_OUTPUT;
702 devc->intr_active_16 = 1;
703 }
704
705 /* save value */
706 spin_lock_irqsave(&devc->lock, flags);
707 bits = devc->bits;
708 if (devc->fullduplex)
709 devc->bits = (devc->bits == AFMT_S16_LE) ?
710 AFMT_U8 : AFMT_S16_LE;
711 spin_unlock_irqrestore(&devc->lock, flags);
712
713 cnt = count;
714 if (devc->bits == AFMT_S16_LE)
715 cnt >>= 1;
716 cnt--;
717
718 spin_lock_irqsave(&devc->lock, flags);
719
720 /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
721
722 sb_dsp_command(devc, 0x41);
723 sb_dsp_command(devc, (unsigned char) ((devc->speed >> 8) & 0xff));
724 sb_dsp_command(devc, (unsigned char) (devc->speed & 0xff));
725
726 sb_dsp_command(devc, (devc->bits == AFMT_S16_LE ? 0xb6 : 0xc6));
727 sb_dsp_command(devc, ((devc->channels == 2 ? 0x20 : 0) +
728 (devc->bits == AFMT_S16_LE ? 0x10 : 0)));
729 sb_dsp_command(devc, (unsigned char) (cnt & 0xff));
730 sb_dsp_command(devc, (unsigned char) (cnt >> 8));
731
732 /* restore real value after all programming */
733 devc->bits = bits;
734 spin_unlock_irqrestore(&devc->lock, flags);
735}
736
737
738/*
739 * This fails on the Cyrix MediaGX. If you don't have the DMA enabled
740 * before the first sample arrives it locks up. However even if you
741 * do enable the DMA in time you just get DMA timeouts and missing
742 * interrupts and stuff, so for now I've not bothered fixing this either.
743 */
744
745static void sb16_audio_start_input(int dev, unsigned long buf, int count, int intrflag)
746{
747 unsigned long flags, cnt;
748 sb_devc *devc = audio_devs[dev]->devc;
749
750 if (!devc->fullduplex || devc->bits != AFMT_S16_LE)
751 {
752 devc->irq_mode = IMODE_INPUT;
753 devc->intr_active = 1;
754 }
755 else
756 {
757 devc->irq_mode_16 = IMODE_INPUT;
758 devc->intr_active_16 = 1;
759 }
760
761 cnt = count;
762 if (devc->bits == AFMT_S16_LE)
763 cnt >>= 1;
764 cnt--;
765
766 spin_lock_irqsave(&devc->lock, flags);
767
768 /* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
769
770 sb_dsp_command(devc, 0x42);
771 sb_dsp_command(devc, (unsigned char) ((devc->speed >> 8) & 0xff));
772 sb_dsp_command(devc, (unsigned char) (devc->speed & 0xff));
773
774 sb_dsp_command(devc, (devc->bits == AFMT_S16_LE ? 0xbe : 0xce));
775 sb_dsp_command(devc, ((devc->channels == 2 ? 0x20 : 0) +
776 (devc->bits == AFMT_S16_LE ? 0x10 : 0)));
777 sb_dsp_command(devc, (unsigned char) (cnt & 0xff));
778 sb_dsp_command(devc, (unsigned char) (cnt >> 8));
779
780 spin_unlock_irqrestore(&devc->lock, flags);
781}
782
783static void sb16_audio_trigger(int dev, int bits)
784{
785 sb_devc *devc = audio_devs[dev]->devc;
786
787 int bits_16 = bits & devc->irq_mode_16;
788 bits &= devc->irq_mode;
789
790 if (!bits && !bits_16)
791 sb_dsp_command(devc, 0xd0); /* Halt DMA */
792 else
793 {
794 if (bits)
795 {
796 switch (devc->irq_mode)
797 {
798 case IMODE_INPUT:
799 sb16_audio_start_input(dev,
800 devc->trg_buf,
801 devc->trg_bytes,
802 devc->trg_intrflag);
803 break;
804
805 case IMODE_OUTPUT:
806 sb16_audio_output_block(dev,
807 devc->trg_buf,
808 devc->trg_bytes,
809 devc->trg_intrflag);
810 break;
811 }
812 }
813 if (bits_16)
814 {
815 switch (devc->irq_mode_16)
816 {
817 case IMODE_INPUT:
818 sb16_audio_start_input(dev,
819 devc->trg_buf_16,
820 devc->trg_bytes_16,
821 devc->trg_intrflag_16);
822 break;
823
824 case IMODE_OUTPUT:
825 sb16_audio_output_block(dev,
826 devc->trg_buf_16,
827 devc->trg_bytes_16,
828 devc->trg_intrflag_16);
829 break;
830 }
831 }
832 }
833
834 devc->trigger_bits = bits | bits_16;
835}
836
837static unsigned char lbuf8[2048];
838static signed short *lbuf16 = (signed short *)lbuf8;
839#define LBUFCOPYSIZE 1024
840static void
841sb16_copy_from_user(int dev,
842 char *localbuf, int localoffs,
843 const char __user *userbuf, int useroffs,
844 int max_in, int max_out,
845 int *used, int *returned,
846 int len)
847{
848 sb_devc *devc = audio_devs[dev]->devc;
849 int i, c, p, locallen;
850 unsigned char *buf8;
851 signed short *buf16;
852
853 /* if not duplex no conversion */
854 if (!devc->fullduplex)
855 {
856 if (copy_from_user(localbuf + localoffs,
857 userbuf + useroffs, len))
858 return;
859 *used = len;
860 *returned = len;
861 }
862 else if (devc->bits == AFMT_S16_LE)
863 {
864 /* 16 -> 8 */
865 /* max_in >> 1, max number of samples in ( 16 bits ) */
866 /* max_out, max number of samples out ( 8 bits ) */
867 /* len, number of samples that will be taken ( 16 bits )*/
868 /* c, count of samples remaining in buffer ( 16 bits )*/
869 /* p, count of samples already processed ( 16 bits )*/
870 len = ( (max_in >> 1) > max_out) ? max_out : (max_in >> 1);
871 c = len;
872 p = 0;
873 buf8 = (unsigned char *)(localbuf + localoffs);
874 while (c)
875 {
876 locallen = (c >= LBUFCOPYSIZE ? LBUFCOPYSIZE : c);
877 /* << 1 in order to get 16 bit samples */
878 if (copy_from_user(lbuf16,
879 userbuf + useroffs + (p << 1),
880 locallen << 1))
881 return;
882 for (i = 0; i < locallen; i++)
883 {
884 buf8[p+i] = ~((lbuf16[i] >> 8) & 0xff) ^ 0x80;
885 }
886 c -= locallen; p += locallen;
887 }
888 /* used = ( samples * 16 bits size ) */
889 *used = max_in > ( max_out << 1) ? (max_out << 1) : max_in;
890 /* returned = ( samples * 8 bits size ) */
891 *returned = len;
892 }
893 else
894 {
895 /* 8 -> 16 */
896 /* max_in, max number of samples in ( 8 bits ) */
897 /* max_out >> 1, max number of samples out ( 16 bits ) */
898 /* len, number of samples that will be taken ( 8 bits )*/
899 /* c, count of samples remaining in buffer ( 8 bits )*/
900 /* p, count of samples already processed ( 8 bits )*/
901 len = max_in > (max_out >> 1) ? (max_out >> 1) : max_in;
902 c = len;
903 p = 0;
904 buf16 = (signed short *)(localbuf + localoffs);
905 while (c)
906 {
907 locallen = (c >= LBUFCOPYSIZE ? LBUFCOPYSIZE : c);
908 if (copy_from_user(lbuf8,
909 userbuf+useroffs + p,
910 locallen))
911 return;
912 for (i = 0; i < locallen; i++)
913 {
914 buf16[p+i] = (~lbuf8[i] ^ 0x80) << 8;
915 }
916 c -= locallen; p += locallen;
917 }
918 /* used = ( samples * 8 bits size ) */
919 *used = len;
920 /* returned = ( samples * 16 bits size ) */
921 *returned = len << 1;
922 }
923}
924
925static void
926sb16_audio_mmap(int dev)
927{
928 sb_devc *devc = audio_devs[dev]->devc;
929 devc->fullduplex = 0;
930}
931
932static struct audio_driver sb1_audio_driver = /* SB1.x */
933{
934 .owner = THIS_MODULE,
935 .open = sb_audio_open,
936 .close = sb_audio_close,
937 .output_block = sb_set_output_parms,
938 .start_input = sb_set_input_parms,
939 .prepare_for_input = sb1_audio_prepare_for_input,
940 .prepare_for_output = sb1_audio_prepare_for_output,
941 .halt_io = sb1_audio_halt_xfer,
942 .trigger = sb1_audio_trigger,
943 .set_speed = sb1_audio_set_speed,
944 .set_bits = sb1_audio_set_bits,
945 .set_channels = sb1_audio_set_channels
946};
947
948static struct audio_driver sb20_audio_driver = /* SB2.0 */
949{
950 .owner = THIS_MODULE,
951 .open = sb_audio_open,
952 .close = sb_audio_close,
953 .output_block = sb_set_output_parms,
954 .start_input = sb_set_input_parms,
955 .prepare_for_input = sb1_audio_prepare_for_input,
956 .prepare_for_output = sb1_audio_prepare_for_output,
957 .halt_io = sb1_audio_halt_xfer,
958 .trigger = sb20_audio_trigger,
959 .set_speed = sb1_audio_set_speed,
960 .set_bits = sb1_audio_set_bits,
961 .set_channels = sb1_audio_set_channels
962};
963
964static struct audio_driver sb201_audio_driver = /* SB2.01 */
965{
966 .owner = THIS_MODULE,
967 .open = sb_audio_open,
968 .close = sb_audio_close,
969 .output_block = sb_set_output_parms,
970 .start_input = sb_set_input_parms,
971 .prepare_for_input = sb1_audio_prepare_for_input,
972 .prepare_for_output = sb1_audio_prepare_for_output,
973 .halt_io = sb1_audio_halt_xfer,
974 .trigger = sb20_audio_trigger,
975 .set_speed = sb201_audio_set_speed,
976 .set_bits = sb1_audio_set_bits,
977 .set_channels = sb1_audio_set_channels
978};
979
980static struct audio_driver sbpro_audio_driver = /* SB Pro */
981{
982 .owner = THIS_MODULE,
983 .open = sb_audio_open,
984 .close = sb_audio_close,
985 .output_block = sb_set_output_parms,
986 .start_input = sb_set_input_parms,
987 .prepare_for_input = sbpro_audio_prepare_for_input,
988 .prepare_for_output = sbpro_audio_prepare_for_output,
989 .halt_io = sb1_audio_halt_xfer,
990 .trigger = sb20_audio_trigger,
991 .set_speed = sbpro_audio_set_speed,
992 .set_bits = sb1_audio_set_bits,
993 .set_channels = sbpro_audio_set_channels
994};
995
996static struct audio_driver jazz16_audio_driver = /* Jazz16 and SM Wave */
997{
998 .owner = THIS_MODULE,
999 .open = sb_audio_open,
1000 .close = sb_audio_close,
1001 .output_block = sb_set_output_parms,
1002 .start_input = sb_set_input_parms,
1003 .prepare_for_input = sbpro_audio_prepare_for_input,
1004 .prepare_for_output = sbpro_audio_prepare_for_output,
1005 .halt_io = sb1_audio_halt_xfer,
1006 .trigger = sb20_audio_trigger,
1007 .set_speed = jazz16_audio_set_speed,
1008 .set_bits = sb16_audio_set_bits,
1009 .set_channels = sbpro_audio_set_channels
1010};
1011
1012static struct audio_driver sb16_audio_driver = /* SB16 */
1013{
1014 .owner = THIS_MODULE,
1015 .open = sb_audio_open,
1016 .close = sb_audio_close,
1017 .output_block = sb_set_output_parms,
1018 .start_input = sb_set_input_parms,
1019 .prepare_for_input = sb16_audio_prepare_for_input,
1020 .prepare_for_output = sb16_audio_prepare_for_output,
1021 .halt_io = sb1_audio_halt_xfer,
1022 .copy_user = sb16_copy_from_user,
1023 .trigger = sb16_audio_trigger,
1024 .set_speed = sb16_audio_set_speed,
1025 .set_bits = sb16_audio_set_bits,
1026 .set_channels = sbpro_audio_set_channels,
1027 .mmap = sb16_audio_mmap
1028};
1029
1030void sb_audio_init(sb_devc * devc, char *name, struct module *owner)
1031{
1032 int audio_flags = 0;
1033 int format_mask = AFMT_U8;
1034
1035 struct audio_driver *driver = &sb1_audio_driver;
1036
1037 switch (devc->model)
1038 {
1039 case MDL_SB1: /* SB1.0 or SB 1.5 */
1040 DDB(printk("Will use standard SB1.x driver\n"));
1041 audio_flags = DMA_HARDSTOP;
1042 break;
1043
1044 case MDL_SB2:
1045 DDB(printk("Will use SB2.0 driver\n"));
1046 audio_flags = DMA_AUTOMODE;
1047 driver = &sb20_audio_driver;
1048 break;
1049
1050 case MDL_SB201:
1051 DDB(printk("Will use SB2.01 (high speed) driver\n"));
1052 audio_flags = DMA_AUTOMODE;
1053 driver = &sb201_audio_driver;
1054 break;
1055
1056 case MDL_JAZZ:
1057 case MDL_SMW:
1058 DDB(printk("Will use Jazz16 driver\n"));
1059 audio_flags = DMA_AUTOMODE;
1060 format_mask |= AFMT_S16_LE;
1061 driver = &jazz16_audio_driver;
1062 break;
1063
1064 case MDL_ESS:
1065 DDB(printk("Will use ESS ES688/1688 driver\n"));
1066 driver = ess_audio_init (devc, &audio_flags, &format_mask);
1067 break;
1068
1069 case MDL_SB16:
1070 DDB(printk("Will use SB16 driver\n"));
1071 audio_flags = DMA_AUTOMODE;
1072 format_mask |= AFMT_S16_LE;
1073 if (devc->dma8 != devc->dma16 && devc->dma16 != -1)
1074 {
1075 audio_flags |= DMA_DUPLEX;
1076 devc->duplex = 1;
1077 }
1078 driver = &sb16_audio_driver;
1079 break;
1080
1081 default:
1082 DDB(printk("Will use SB Pro driver\n"));
1083 audio_flags = DMA_AUTOMODE;
1084 driver = &sbpro_audio_driver;
1085 }
1086
1087 if (owner)
1088 driver->owner = owner;
1089
1090 if ((devc->dev = sound_install_audiodrv(AUDIO_DRIVER_VERSION,
1091 name,driver, sizeof(struct audio_driver),
1092 audio_flags, format_mask, devc,
1093 devc->dma8,
1094 devc->duplex ? devc->dma16 : devc->dma8)) < 0)
1095 {
1096 printk(KERN_ERR "Sound Blaster: unable to install audio.\n");
1097 return;
1098 }
1099 audio_devs[devc->dev]->mixer_dev = devc->my_mixerdev;
1100 audio_devs[devc->dev]->min_fragment = 5;
1101}