This source file includes following definitions.
- snd_ioctl_return
- sound_read
- sound_write
- sound_lseek
- sound_open
- sound_release
- sound_ioctl
- sound_select
- sound_mmap
- soundcard_init
- free_all_irqs
- init_module
- cleanup_module
- tenmicrosec
- snd_set_irq_handler
- snd_release_irq
- sound_alloc_dma
- sound_open_dma
- sound_free_dma
- sound_close_dma
- request_sound_timer
- sound_stop_timer
- sound_alloc_dmap
- sound_free_dmap
- soud_map_buffer
- conf_printf
- conf_printf2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29 #include <linux/config.h>
30
31
32 #include "sound_config.h"
33
34 #include <linux/major.h>
35
36 static int chrdev_registered = 0;
37 static int sound_major = SOUND_MAJOR;
38
39 static int is_unloading = 0;
40
41
42
43
44 caddr_t sound_mem_blocks[1024];
45 int sound_num_blocks = 0;
46
47 static int soundcard_configured = 0;
48
49 static struct fileinfo files[SND_NDEVS];
50
51 static char dma_alloc_map[8] =
52 {0};
53
54 #define DMA_MAP_UNAVAIL 0
55 #define DMA_MAP_FREE 1
56 #define DMA_MAP_BUSY 2
57
58 int
59 snd_ioctl_return (int *addr, int value)
60 {
61 if (value < 0)
62 return value;
63
64 put_fs_long (value, (long *) &((addr)[0]));
65 return 0;
66 }
67
68 static int
69 sound_read (inode_handle * inode, file_handle * file, char *buf, int count)
70 {
71 int dev;
72
73 dev = inode_get_rdev (inode);
74 dev = MINOR (dev);
75 files[dev].flags = file_get_flags (file);
76
77 return sound_read_sw (dev, &files[dev], buf, count);
78 }
79
80 static int
81 sound_write (inode_handle * inode, file_handle * file, const char *buf, int count)
82 {
83 int dev;
84
85 dev = inode_get_rdev (inode);
86 dev = MINOR (dev);
87 files[dev].flags = file_get_flags (file);
88
89 return sound_write_sw (dev, &files[dev], buf, count);
90 }
91
92 static int
93 sound_lseek (inode_handle * inode, file_handle * file, off_t offset, int orig)
94 {
95 return -EPERM;
96 }
97
98 static int
99 sound_open (inode_handle * inode, file_handle * file)
100 {
101 int dev, retval;
102 struct fileinfo tmp_file;
103
104 if (is_unloading)
105 {
106 printk ("Sound: Driver partially removed. Can't open device\n");
107 return -EBUSY;
108 }
109
110 dev = inode_get_rdev (inode);
111 dev = MINOR (dev);
112
113 if (!soundcard_configured && dev != SND_DEV_CTL && dev != SND_DEV_STATUS)
114 {
115 printk ("SoundCard Error: The soundcard system has not been configured\n");
116 return -ENXIO;
117 }
118
119 tmp_file.mode = 0;
120 tmp_file.flags = file_get_flags (file);
121
122 if ((tmp_file.flags & O_ACCMODE) == O_RDWR)
123 tmp_file.mode = OPEN_READWRITE;
124 if ((tmp_file.flags & O_ACCMODE) == O_RDONLY)
125 tmp_file.mode = OPEN_READ;
126 if ((tmp_file.flags & O_ACCMODE) == O_WRONLY)
127 tmp_file.mode = OPEN_WRITE;
128
129 if ((retval = sound_open_sw (dev, &tmp_file)) < 0)
130 return retval;
131
132 #ifdef MODULE
133 MOD_INC_USE_COUNT;
134 #endif
135
136 memcpy ((char *) &files[dev], (char *) &tmp_file, sizeof (tmp_file));
137 return retval;
138 }
139
140 static void
141 sound_release (inode_handle * inode, file_handle * file)
142 {
143 int dev;
144
145 dev = inode_get_rdev (inode);
146 dev = MINOR (dev);
147
148 files[dev].flags = file_get_flags (file);
149
150 sound_release_sw (dev, &files[dev]);
151 #ifdef MODULE
152 MOD_DEC_USE_COUNT;
153 #endif
154 }
155
156 static int
157 sound_ioctl (inode_handle * inode, file_handle * file,
158 unsigned int cmd, unsigned long arg)
159 {
160 int dev, err;
161
162 dev = inode_get_rdev (inode);
163 dev = MINOR (dev);
164 files[dev].flags = file_get_flags (file);
165
166 if (_IOC_DIR (cmd) != _IOC_NONE)
167 {
168
169
170
171 int len;
172
173 len = _IOC_SIZE (cmd);
174
175 if (_IOC_DIR (cmd) == _IOC_WRITE)
176 {
177 if ((err = verify_area (VERIFY_READ, (void *) arg, len)) < 0)
178 return err;
179 }
180
181 if (_IOC_DIR (cmd) == _IOC_READ)
182 {
183 if ((err = verify_area (VERIFY_WRITE, (void *) arg, len)) < 0)
184 return err;
185 }
186
187 }
188
189 err = sound_ioctl_sw (dev, &files[dev], cmd, (caddr_t) arg);
190
191 return err;
192 }
193
194 static int
195 sound_select (inode_handle * inode, file_handle * file, int sel_type, select_table_handle * wait)
196 {
197 int dev;
198
199 dev = inode_get_rdev (inode);
200 dev = MINOR (dev);
201 files[dev].flags = file_get_flags (file);
202
203 DEB (printk ("sound_select(dev=%d, type=0x%x)\n", dev, sel_type));
204
205 switch (dev & 0x0f)
206 {
207 #ifdef CONFIG_SEQUENCER
208 case SND_DEV_SEQ:
209 case SND_DEV_SEQ2:
210 return sequencer_select (dev, &files[dev], sel_type, wait);
211 break;
212 #endif
213
214 #ifdef CONFIG_MIDI
215 case SND_DEV_MIDIN:
216 return MIDIbuf_select (dev, &files[dev], sel_type, wait);
217 break;
218 #endif
219
220 #ifdef CONFIG_AUDIO
221 case SND_DEV_DSP:
222 case SND_DEV_DSP16:
223 case SND_DEV_AUDIO:
224 return audio_select (dev, &files[dev], sel_type, wait);
225 break;
226 #endif
227
228 default:
229 return 0;
230 }
231
232 return 0;
233 }
234
235 static int
236 sound_mmap (inode_handle * inode, file_handle * file, vm_area_handle * vma)
237 {
238 int dev, dev_class;
239 unsigned long size;
240 struct dma_buffparms *dmap = NULL;
241
242 dev = inode_get_rdev (inode);
243 dev = MINOR (dev);
244 files[dev].flags = file_get_flags (file);
245
246 dev_class = dev & 0x0f;
247 dev >>= 4;
248
249 if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO)
250 {
251 printk ("Sound: mmap() not supported for other than audio devices\n");
252 return -EINVAL;
253 }
254
255 if ((vma_get_flags (vma) & (VM_READ | VM_WRITE)) == (VM_READ | VM_WRITE))
256 {
257 printk ("Sound: Cannot do read/write mmap()\n");
258 return -EINVAL;
259 }
260
261 if (vma_get_flags (vma) & VM_READ)
262 {
263 dmap = audio_devs[dev]->dmap_in;
264 }
265 else if (vma_get_flags (vma) & VM_WRITE)
266 {
267 dmap = audio_devs[dev]->dmap_out;
268 }
269 else
270 {
271 printk ("Sound: Undefined mmap() access\n");
272 return -EINVAL;
273 }
274
275 if (dmap == NULL)
276 {
277 printk ("Sound: mmap() error. dmap == NULL\n");
278 return -EIO;
279 }
280
281 if (dmap->raw_buf == NULL)
282 {
283 printk ("Sound: mmap() called when raw_buf == NULL\n");
284 return -EIO;
285 }
286
287 if (dmap->mapping_flags)
288 {
289 printk ("Sound: mmap() called twice for the same DMA buffer\n");
290 return -EIO;
291 }
292
293 if (vma_get_offset (vma) != 0)
294 {
295 printk ("Sound: mmap() offset must be 0.\n");
296 return -EINVAL;
297 }
298
299 size = vma_get_end (vma) - vma_get_start (vma);
300
301 if (size != dmap->bytes_in_use)
302 {
303 printk ("Sound: mmap() size = %ld. Should be %d\n",
304 size, dmap->bytes_in_use);
305 }
306
307
308 if (remap_page_range (vma_get_start (vma), dmap->raw_buf_phys,
309 vma_get_end (vma) - vma_get_start (vma),
310 vma_get_page_prot (vma)))
311 return -EAGAIN;
312
313 vma_set_inode (vma, inode);
314 inode_inc_count (inode);
315
316 dmap->mapping_flags |= DMA_MAP_MAPPED;
317
318 memset (dmap->raw_buf,
319 dmap->neutral_byte,
320 dmap->bytes_in_use);
321 return 0;
322 }
323
324 static struct file_operation_handle sound_fops =
325 {
326 sound_lseek,
327 sound_read,
328 sound_write,
329 NULL,
330 sound_select,
331 sound_ioctl,
332 sound_mmap,
333 sound_open,
334 sound_release
335 };
336
337 void
338 soundcard_init (void)
339 {
340 #ifndef MODULE
341 module_register_chrdev (sound_major, "sound", &sound_fops);
342 chrdev_registered = 1;
343 #endif
344
345 soundcard_configured = 1;
346
347 sndtable_init (0);
348
349
350 if (sndtable_get_cardcount () == 0)
351 return;
352
353 #ifdef CONFIG_AUDIO
354 if (num_audiodevs)
355 {
356 DMAbuf_init (0);
357 audio_init (0);
358 }
359 #endif
360
361 #ifdef CONFIG_MIDI
362 if (num_midis)
363 MIDIbuf_init (0);
364 #endif
365
366 #ifdef CONFIG_SEQUENCER
367 if (num_midis + num_synths)
368 sequencer_init (0);
369 #endif
370
371 }
372
373 static unsigned int irqs = 0;
374
375 #ifdef MODULE
376 static void
377 free_all_irqs (void)
378 {
379 int i;
380
381 for (i = 0; i < 31; i++)
382 if (irqs & (1ul << i))
383 {
384 printk ("Sound warning: IRQ%d was left allocated - fixed.\n", i);
385 snd_release_irq (i);
386 }
387 irqs = 0;
388 }
389
390 char kernel_version[] = UTS_RELEASE;
391
392 #endif
393
394 static int debugmem = 0;
395
396 static int sound[20] =
397 {0};
398
399 int
400 init_module (void)
401 {
402 int err;
403 int ints[21];
404 int i;
405
406 if (connect_wrapper (WRAPPER_VERSION) < 0)
407 {
408 printk ("Sound: Incompatible kernel (wrapper) version\n");
409 return -EINVAL;
410 }
411
412
413
414
415 i = 0;
416 while (i < 20 && sound[i])
417 ints[i + 1] = sound[i++];
418 ints[0] = i;
419
420 if (i)
421 sound_setup ("sound=", ints);
422
423 err = module_register_chrdev (sound_major, "sound", &sound_fops);
424 if (err)
425 {
426 printk ("sound: driver already loaded/included in kernel\n");
427 return err;
428 }
429
430 chrdev_registered = 1;
431 soundcard_init ();
432
433 if (sound_num_blocks >= 1024)
434 printk ("Sound warning: Deallocation table was too small.\n");
435
436 return 0;
437 }
438
439 #ifdef MODULE
440
441
442 void
443 cleanup_module (void)
444 {
445 if (MOD_IN_USE)
446 printk ("sound: module busy -- remove delayed\n");
447 else
448 {
449 int i;
450
451 if (chrdev_registered)
452 module_unregister_chrdev (sound_major, "sound");
453
454 #ifdef CONFIG_SEQUENCER
455 sound_stop_timer ();
456 #endif
457 sound_unload_drivers ();
458
459 for (i = 0; i < sound_num_blocks; i++)
460 kfree (sound_mem_blocks[i]);
461
462 free_all_irqs ();
463
464 for (i = 0; i < 8; i++)
465 if (dma_alloc_map[i] != DMA_MAP_UNAVAIL)
466 {
467 printk ("Sound: Hmm, DMA%d was left allocated - fixed\n", i);
468 sound_free_dma (i);
469 }
470 }
471 }
472 #endif
473
474 void
475 tenmicrosec (int *osp)
476 {
477 int i;
478
479 for (i = 0; i < 16; i++)
480 inb (0x80);
481 }
482
483 int
484 snd_set_irq_handler (int interrupt_level, void (*hndlr) (int, struct pt_regs *), char *name, int *osp)
485 {
486 int retcode;
487
488 retcode = request_irq (interrupt_level, hndlr, 0 , name);
489 if (retcode < 0)
490 {
491 printk ("Sound: IRQ%d already in use\n", interrupt_level);
492 }
493 else
494 irqs |= (1ul << interrupt_level);
495
496 return retcode;
497 }
498
499 void
500 snd_release_irq (int vect)
501 {
502 irqs &= ~(1ul << vect);
503 free_irq (vect);
504 }
505
506 int
507 sound_alloc_dma (int chn, char *deviceID)
508 {
509 int err;
510
511 if ((err = request_dma (chn, deviceID)) != 0)
512 return err;
513
514 dma_alloc_map[chn] = DMA_MAP_FREE;
515
516 return 0;
517 }
518
519 int
520 sound_open_dma (int chn, char *deviceID)
521 {
522 unsigned long flags;
523
524 save_flags (flags);
525 cli ();
526
527 if (dma_alloc_map[chn] != DMA_MAP_FREE)
528 {
529 printk ("sound_open_dma: DMA channel %d busy or not allocated\n", chn);
530 restore_flags (flags);
531 return 1;
532 }
533
534 dma_alloc_map[chn] = DMA_MAP_BUSY;
535 restore_flags (flags);
536 return 0;
537 }
538
539 void
540 sound_free_dma (int chn)
541 {
542 if (dma_alloc_map[chn] != DMA_MAP_FREE)
543 {
544
545 return;
546 }
547 free_dma (chn);
548 dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
549 }
550
551 void
552 sound_close_dma (int chn)
553 {
554 unsigned long flags;
555
556 save_flags (flags);
557 cli ();
558
559 if (dma_alloc_map[chn] != DMA_MAP_BUSY)
560 {
561 printk ("sound_close_dma: Bad access to DMA channel %d\n", chn);
562 restore_flags (flags);
563 return;
564 }
565 dma_alloc_map[chn] = DMA_MAP_FREE;
566 restore_flags (flags);
567 }
568
569 #ifdef CONFIG_SEQUENCER
570
571
572 static struct timer_list seq_timer =
573 {NULL, NULL, 0, 0, sequencer_timer};
574
575 void
576 request_sound_timer (int count)
577 {
578 extern unsigned long seq_time;
579
580 if (count < 0)
581 count = jiffies + (-count);
582 else
583 count += seq_time;
584
585 ;
586
587 {
588 seq_timer.expires = ((count - jiffies)) + jiffies;
589 add_timer (&seq_timer);
590 };
591 }
592
593 void
594 sound_stop_timer (void)
595 {
596 del_timer (&seq_timer);;
597 }
598 #endif
599
600 #ifdef CONFIG_AUDIO
601
602 #ifdef KMALLOC_DMA_BROKEN
603 fatal_error__This_version_is_not_compatible_with_this_kernel;
604 #endif
605
606 static int dma_buffsize = DSP_BUFFSIZE;
607
608 int
609 sound_alloc_dmap (int dev, struct dma_buffparms *dmap, int chan)
610 {
611 char *start_addr, *end_addr;
612 int i, dma_pagesize;
613
614 dmap->mapping_flags &= ~DMA_MAP_MAPPED;
615
616 if (dmap->raw_buf != NULL)
617 return 0;
618
619 if (dma_buffsize < 4096)
620 dma_buffsize = 4096;
621
622 if (chan < 4)
623 dma_pagesize = 64 * 1024;
624 else
625 dma_pagesize = 128 * 1024;
626
627 dmap->raw_buf = NULL;
628
629 if (debugmem)
630 printk ("sound: buffsize[%d] = %lu\n", dev, audio_devs[dev]->buffsize);
631
632 audio_devs[dev]->buffsize = dma_buffsize;
633
634 if (audio_devs[dev]->buffsize > dma_pagesize)
635 audio_devs[dev]->buffsize = dma_pagesize;
636
637 start_addr = NULL;
638
639
640
641
642
643
644 while (start_addr == NULL && audio_devs[dev]->buffsize > PAGE_SIZE)
645 {
646 int sz, size;
647
648 for (sz = 0, size = PAGE_SIZE;
649 size < audio_devs[dev]->buffsize;
650 sz++, size <<= 1);
651
652 audio_devs[dev]->buffsize = PAGE_SIZE * (1 << sz);
653
654 if ((start_addr = (char *) __get_free_pages (GFP_ATOMIC, sz, MAX_DMA_ADDRESS)) == NULL)
655 audio_devs[dev]->buffsize /= 2;
656 }
657
658 if (start_addr == NULL)
659 {
660 printk ("Sound error: Couldn't allocate DMA buffer\n");
661 return -ENOMEM;
662 }
663 else
664 {
665
666 end_addr = start_addr + audio_devs[dev]->buffsize - 1;
667
668 if (debugmem)
669 printk ("sound: start 0x%lx, end 0x%lx\n",
670 (long) start_addr, (long) end_addr);
671
672
673
674 if (((long) start_addr & ~(dma_pagesize - 1))
675 != ((long) end_addr & ~(dma_pagesize - 1))
676 || end_addr >= (char *) (MAX_DMA_ADDRESS))
677 {
678 printk (
679 "sound: kmalloc returned invalid address 0x%lx for %ld Bytes DMA-buffer\n",
680 (long) start_addr,
681 audio_devs[dev]->buffsize);
682 return -EFAULT;
683 }
684 }
685 dmap->raw_buf = start_addr;
686 dmap->raw_buf_phys = virt_to_bus (start_addr);
687
688 memset (dmap->raw_buf, 0x00, audio_devs[dev]->buffsize);
689
690 for (i = MAP_NR (start_addr); i <= MAP_NR (end_addr); i++)
691 {
692 mem_map_reserve (i);
693 }
694
695 return 0;
696 }
697
698 void
699 sound_free_dmap (int dev, struct dma_buffparms *dmap)
700 {
701 if (dmap->raw_buf == NULL)
702 return;
703
704 if (dmap->mapping_flags & DMA_MAP_MAPPED)
705 return;
706
707 {
708 int sz, size, i;
709 unsigned long start_addr, end_addr;
710
711 for (sz = 0, size = PAGE_SIZE;
712 size < audio_devs[dev]->buffsize;
713 sz++, size <<= 1);
714
715 start_addr = (unsigned long) dmap->raw_buf;
716 end_addr = start_addr + audio_devs[dev]->buffsize;
717
718 for (i = MAP_NR (start_addr); i <= MAP_NR (end_addr); i++)
719 {
720 mem_map_unreserve (i);
721 }
722
723 free_pages ((unsigned long) dmap->raw_buf, sz);
724 }
725 dmap->raw_buf = NULL;
726 }
727
728 int
729 soud_map_buffer (int dev, struct dma_buffparms *dmap, buffmem_desc * info)
730 {
731 printk ("Entered sound_map_buffer()\n");
732 printk ("Exited sound_map_buffer()\n");
733 return -EINVAL;
734 }
735
736 void
737 conf_printf (char *name, struct address_info *hw_config)
738 {
739 if (!trace_init)
740 return;
741
742 printk ("<%s> at 0x%03x", name, hw_config->io_base);
743
744 if (hw_config->irq)
745 printk (" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
746
747 if (hw_config->dma != -1 || hw_config->dma2 != -1)
748 {
749 printk (" dma %d", hw_config->dma);
750 if (hw_config->dma2 != -1)
751 printk (",%d", hw_config->dma2);
752 }
753
754 printk ("\n");
755 }
756
757 void
758 conf_printf2 (char *name, int base, int irq, int dma, int dma2)
759 {
760 if (!trace_init)
761 return;
762
763 printk ("<%s> at 0x%03x", name, base);
764
765 if (irq)
766 printk (" irq %d", (irq > 0) ? irq : -irq);
767
768 if (dma != -1 || dma2 != -1)
769 {
770 printk (" dma %d", dma);
771 if (dma2 != -1)
772 printk (",%d", dma2);
773 }
774
775 printk ("\n");
776 }
777 #endif