1 /*
2 * linux/drivers/sound/soundcard.c
3 *
4 * Sound card driver for Linux
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 *
14 * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
15 * integrated sound_switch.c
16 * Stefan Reinauer : integrated /proc/sound (equals to /dev/sndstat,
17 * which should disappear in the near future)
18 * Eric Dumas : devfs support (22-Jan-98) <dumas@linux.eu.org> with
19 * fixups by C. Scott Ananian <cananian@alumni.princeton.edu>
20 * Richard Gooch : moved common (non OSS-specific) devices to sound_core.c
21 * Rob Riggs : Added persistent DMA buffers support (1998/10/17)
22 * Christoph Hellwig : Some cleanup work (2000/03/01)
23 */
24
25 #include <linux/config.h>
26
27 #include "sound_config.h"
28 #include <linux/init.h>
29 #include <linux/types.h>
30 #include <linux/errno.h>
31 #include <linux/signal.h>
32 #include <linux/fcntl.h>
33 #include <linux/ctype.h>
34 #include <linux/stddef.h>
35 #include <linux/kmod.h>
36 #include <asm/dma.h>
37 #include <asm/io.h>
38 #include <asm/segment.h>
39 #include <linux/wait.h>
40 #include <linux/slab.h>
41 #include <linux/ioport.h>
42 #include <linux/devfs_fs_kernel.h>
43 #include <linux/major.h>
44 #include <linux/delay.h>
45 #include <linux/proc_fs.h>
46 #include <linux/smp_lock.h>
47 #include <linux/module.h>
48
49 /*
50 * This ought to be moved into include/asm/dma.h
51 */
52 #ifndef valid_dma
53 #define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4)
54 #endif
55
56 /*
57 * Table for permanently allocated memory (used when unloading the module)
58 */
59 caddr_t sound_mem_blocks[1024];
60 int sound_nblocks = 0;
61
62 /* Persistent DMA buffers */
63 #ifdef CONFIG_SOUND_DMAP
64 int sound_dmap_flag = 1;
65 #else
66 int sound_dmap_flag = 0;
67 #endif
68
69 static char dma_alloc_map[MAX_DMA_CHANNELS] = {0};
70
71 #define DMA_MAP_UNAVAIL 0
72 #define DMA_MAP_FREE 1
73 #define DMA_MAP_BUSY 2
74
75
76 unsigned long seq_time = 0; /* Time for /dev/sequencer */
77
78 /*
79 * Table for configurable mixer volume handling
80 */
81 static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
82 static int num_mixer_volumes = 0;
83
load_mixer_volumes(char * name,int * levels,int present)84 int *load_mixer_volumes(char *name, int *levels, int present)
85 {
86 int i, n;
87
88 for (i = 0; i < num_mixer_volumes; i++) {
89 if (strcmp(name, mixer_vols[i].name) == 0) {
90 if (present)
91 mixer_vols[i].num = i;
92 return mixer_vols[i].levels;
93 }
94 }
95 if (num_mixer_volumes >= MAX_MIXER_DEV) {
96 printk(KERN_ERR "Sound: Too many mixers (%s)\n", name);
97 return levels;
98 }
99 n = num_mixer_volumes++;
100
101 strcpy(mixer_vols[n].name, name);
102
103 if (present)
104 mixer_vols[n].num = n;
105 else
106 mixer_vols[n].num = -1;
107
108 for (i = 0; i < 32; i++)
109 mixer_vols[n].levels[i] = levels[i];
110 return mixer_vols[n].levels;
111 }
112
set_mixer_levels(caddr_t arg)113 static int set_mixer_levels(caddr_t arg)
114 {
115 /* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */
116 mixer_vol_table buf;
117
118 if (__copy_from_user(&buf, arg, sizeof(buf)))
119 return -EFAULT;
120 load_mixer_volumes(buf.name, buf.levels, 0);
121 if (__copy_to_user(arg, &buf, sizeof(buf)))
122 return -EFAULT;
123 return 0;
124 }
125
get_mixer_levels(caddr_t arg)126 static int get_mixer_levels(caddr_t arg)
127 {
128 int n;
129
130 if (__get_user(n, (int *)(&(((mixer_vol_table *)arg)->num))))
131 return -EFAULT;
132 if (n < 0 || n >= num_mixer_volumes)
133 return -EINVAL;
134 if (__copy_to_user(arg, &mixer_vols[n], sizeof(mixer_vol_table)))
135 return -EFAULT;
136 return 0;
137 }
138
139 #ifndef MIN
140 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
141 #endif
142
143 /* 4K page size but our output routines use some slack for overruns */
144 #define PROC_BLOCK_SIZE (3*1024)
145
sound_read(struct file * file,char * buf,size_t count,loff_t * ppos)146 static ssize_t sound_read(struct file *file, char *buf, size_t count, loff_t *ppos)
147 {
148 int dev = MINOR(file->f_dentry->d_inode->i_rdev);
149 int ret = -EINVAL;
150
151 /*
152 * The OSS drivers aren't remotely happy without this locking,
153 * and unless someone fixes them when they are about to bite the
154 * big one anyway, we might as well bandage here..
155 */
156
157 lock_kernel();
158
159 DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
160 switch (dev & 0x0f) {
161 case SND_DEV_DSP:
162 case SND_DEV_DSP16:
163 case SND_DEV_AUDIO:
164 ret = audio_read(dev, file, buf, count);
165 break;
166
167 case SND_DEV_SEQ:
168 case SND_DEV_SEQ2:
169 ret = sequencer_read(dev, file, buf, count);
170 break;
171
172 case SND_DEV_MIDIN:
173 ret = MIDIbuf_read(dev, file, buf, count);
174 }
175 unlock_kernel();
176 return ret;
177 }
178
sound_write(struct file * file,const char * buf,size_t count,loff_t * ppos)179 static ssize_t sound_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
180 {
181 int dev = MINOR(file->f_dentry->d_inode->i_rdev);
182 int ret = -EINVAL;
183
184 lock_kernel();
185 DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
186 switch (dev & 0x0f) {
187 case SND_DEV_SEQ:
188 case SND_DEV_SEQ2:
189 ret = sequencer_write(dev, file, buf, count);
190 break;
191
192 case SND_DEV_DSP:
193 case SND_DEV_DSP16:
194 case SND_DEV_AUDIO:
195 ret = audio_write(dev, file, buf, count);
196 break;
197
198 case SND_DEV_MIDIN:
199 ret = MIDIbuf_write(dev, file, buf, count);
200 break;
201 }
202 unlock_kernel();
203 return ret;
204 }
205
sound_open(struct inode * inode,struct file * file)206 static int sound_open(struct inode *inode, struct file *file)
207 {
208 int dev = MINOR(inode->i_rdev);
209 int retval;
210
211 DEB(printk("sound_open(dev=%d)\n", dev));
212 if ((dev >= SND_NDEVS) || (dev < 0)) {
213 printk(KERN_ERR "Invalid minor device %d\n", dev);
214 return -ENXIO;
215 }
216 switch (dev & 0x0f) {
217 case SND_DEV_CTL:
218 dev >>= 4;
219 if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
220 char modname[20];
221 sprintf(modname, "mixer%d", dev);
222 request_module(modname);
223 }
224 if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
225 return -ENXIO;
226
227 if (mixer_devs[dev]->owner)
228 __MOD_INC_USE_COUNT (mixer_devs[dev]->owner);
229 break;
230
231 case SND_DEV_SEQ:
232 case SND_DEV_SEQ2:
233 if ((retval = sequencer_open(dev, file)) < 0)
234 return retval;
235 break;
236
237 case SND_DEV_MIDIN:
238 if ((retval = MIDIbuf_open(dev, file)) < 0)
239 return retval;
240 break;
241
242 case SND_DEV_DSP:
243 case SND_DEV_DSP16:
244 case SND_DEV_AUDIO:
245 if ((retval = audio_open(dev, file)) < 0)
246 return retval;
247 break;
248
249 default:
250 printk(KERN_ERR "Invalid minor device %d\n", dev);
251 return -ENXIO;
252 }
253
254 return 0;
255 }
256
sound_release(struct inode * inode,struct file * file)257 static int sound_release(struct inode *inode, struct file *file)
258 {
259 int dev = MINOR(inode->i_rdev);
260
261 lock_kernel();
262 DEB(printk("sound_release(dev=%d)\n", dev));
263 switch (dev & 0x0f) {
264 case SND_DEV_CTL:
265 dev >>= 4;
266 if (mixer_devs[dev]->owner)
267 __MOD_DEC_USE_COUNT (mixer_devs[dev]->owner);
268 break;
269
270 case SND_DEV_SEQ:
271 case SND_DEV_SEQ2:
272 sequencer_release(dev, file);
273 break;
274
275 case SND_DEV_MIDIN:
276 MIDIbuf_release(dev, file);
277 break;
278
279 case SND_DEV_DSP:
280 case SND_DEV_DSP16:
281 case SND_DEV_AUDIO:
282 audio_release(dev, file);
283 break;
284
285 default:
286 printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
287 }
288 unlock_kernel();
289
290 return 0;
291 }
292
get_mixer_info(int dev,caddr_t arg)293 static int get_mixer_info(int dev, caddr_t arg)
294 {
295 mixer_info info;
296
297 strncpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
298 strncpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
299 info.name[sizeof(info.name)-1] = 0;
300 info.modify_counter = mixer_devs[dev]->modify_counter;
301 if (__copy_to_user(arg, &info, sizeof(info)))
302 return -EFAULT;
303 return 0;
304 }
305
get_old_mixer_info(int dev,caddr_t arg)306 static int get_old_mixer_info(int dev, caddr_t arg)
307 {
308 _old_mixer_info info;
309
310 strncpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
311 strncpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
312 info.name[sizeof(info.name)-1] = 0;
313 if (copy_to_user(arg, &info, sizeof(info)))
314 return -EFAULT;
315 return 0;
316 }
317
sound_mixer_ioctl(int mixdev,unsigned int cmd,caddr_t arg)318 static int sound_mixer_ioctl(int mixdev, unsigned int cmd, caddr_t arg)
319 {
320 if (mixdev < 0 || mixdev >= MAX_MIXER_DEV)
321 return -ENXIO;
322 /* Try to load the mixer... */
323 if (mixer_devs[mixdev] == NULL) {
324 char modname[20];
325 sprintf(modname, "mixer%d", mixdev);
326 request_module(modname);
327 }
328 if (mixdev >= num_mixers || !mixer_devs[mixdev])
329 return -ENXIO;
330 if (cmd == SOUND_MIXER_INFO)
331 return get_mixer_info(mixdev, arg);
332 if (cmd == SOUND_OLD_MIXER_INFO)
333 return get_old_mixer_info(mixdev, arg);
334 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
335 mixer_devs[mixdev]->modify_counter++;
336 if (!mixer_devs[mixdev]->ioctl)
337 return -EINVAL;
338 return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg);
339 }
340
sound_ioctl(struct inode * inode,struct file * file,unsigned int cmd,unsigned long arg)341 static int sound_ioctl(struct inode *inode, struct file *file,
342 unsigned int cmd, unsigned long arg)
343 {
344 int err, len = 0, dtype;
345 int dev = MINOR(inode->i_rdev);
346
347 if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
348 /*
349 * Have to validate the address given by the process.
350 */
351 len = _SIOC_SIZE(cmd);
352 if (len < 1 || len > 65536 || arg == 0)
353 return -EFAULT;
354 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
355 if ((err = verify_area(VERIFY_READ, (void *)arg, len)) < 0)
356 return err;
357 if (_SIOC_DIR(cmd) & _SIOC_READ)
358 if ((err = verify_area(VERIFY_WRITE, (void *)arg, len)) < 0)
359 return err;
360 }
361 DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
362 if (cmd == OSS_GETVERSION)
363 return __put_user(SOUND_VERSION, (int *)arg);
364
365 if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 && /* Mixer ioctl */
366 (dev & 0x0f) != SND_DEV_CTL) {
367 dtype = dev & 0x0f;
368 switch (dtype) {
369 case SND_DEV_DSP:
370 case SND_DEV_DSP16:
371 case SND_DEV_AUDIO:
372 return sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
373 cmd, (caddr_t)arg);
374
375 default:
376 return sound_mixer_ioctl(dev >> 4, cmd, (caddr_t)arg);
377 }
378 }
379 switch (dev & 0x0f) {
380 case SND_DEV_CTL:
381 if (cmd == SOUND_MIXER_GETLEVELS)
382 return get_mixer_levels((caddr_t)arg);
383 if (cmd == SOUND_MIXER_SETLEVELS)
384 return set_mixer_levels((caddr_t)arg);
385 return sound_mixer_ioctl(dev >> 4, cmd, (caddr_t)arg);
386
387 case SND_DEV_SEQ:
388 case SND_DEV_SEQ2:
389 return sequencer_ioctl(dev, file, cmd, (caddr_t)arg);
390
391 case SND_DEV_DSP:
392 case SND_DEV_DSP16:
393 case SND_DEV_AUDIO:
394 return audio_ioctl(dev, file, cmd, (caddr_t)arg);
395 break;
396
397 case SND_DEV_MIDIN:
398 return MIDIbuf_ioctl(dev, file, cmd, (caddr_t)arg);
399 break;
400
401 }
402 return -EINVAL;
403 }
404
sound_poll(struct file * file,poll_table * wait)405 static unsigned int sound_poll(struct file *file, poll_table * wait)
406 {
407 struct inode *inode = file->f_dentry->d_inode;
408 int dev = MINOR(inode->i_rdev);
409
410 DEB(printk("sound_poll(dev=%d)\n", dev));
411 switch (dev & 0x0f) {
412 case SND_DEV_SEQ:
413 case SND_DEV_SEQ2:
414 return sequencer_poll(dev, file, wait);
415
416 case SND_DEV_MIDIN:
417 return MIDIbuf_poll(dev, file, wait);
418
419 case SND_DEV_DSP:
420 case SND_DEV_DSP16:
421 case SND_DEV_AUDIO:
422 return DMAbuf_poll(file, dev >> 4, wait);
423 }
424 return 0;
425 }
426
sound_mmap(struct file * file,struct vm_area_struct * vma)427 static int sound_mmap(struct file *file, struct vm_area_struct *vma)
428 {
429 int dev_class;
430 unsigned long size;
431 struct dma_buffparms *dmap = NULL;
432 int dev = MINOR(file->f_dentry->d_inode->i_rdev);
433
434 dev_class = dev & 0x0f;
435 dev >>= 4;
436
437 if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
438 printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
439 return -EINVAL;
440 }
441 lock_kernel();
442 if (vma->vm_flags & VM_WRITE) /* Map write and read/write to the output buf */
443 dmap = audio_devs[dev]->dmap_out;
444 else if (vma->vm_flags & VM_READ)
445 dmap = audio_devs[dev]->dmap_in;
446 else {
447 printk(KERN_ERR "Sound: Undefined mmap() access\n");
448 unlock_kernel();
449 return -EINVAL;
450 }
451
452 if (dmap == NULL) {
453 printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
454 unlock_kernel();
455 return -EIO;
456 }
457 if (dmap->raw_buf == NULL) {
458 printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
459 unlock_kernel();
460 return -EIO;
461 }
462 if (dmap->mapping_flags) {
463 printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
464 unlock_kernel();
465 return -EIO;
466 }
467 if (vma->vm_pgoff != 0) {
468 printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
469 unlock_kernel();
470 return -EINVAL;
471 }
472 size = vma->vm_end - vma->vm_start;
473
474 if (size != dmap->bytes_in_use) {
475 printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
476 }
477 if (remap_page_range(vma->vm_start, virt_to_phys(dmap->raw_buf),
478 vma->vm_end - vma->vm_start,
479 vma->vm_page_prot)) {
480 unlock_kernel();
481 return -EAGAIN;
482 }
483
484 dmap->mapping_flags |= DMA_MAP_MAPPED;
485
486 if( audio_devs[dev]->d->mmap)
487 audio_devs[dev]->d->mmap(dev);
488
489 memset(dmap->raw_buf,
490 dmap->neutral_byte,
491 dmap->bytes_in_use);
492 unlock_kernel();
493 return 0;
494 }
495
496 struct file_operations oss_sound_fops = {
497 owner: THIS_MODULE,
498 llseek: no_llseek,
499 read: sound_read,
500 write: sound_write,
501 poll: sound_poll,
502 ioctl: sound_ioctl,
503 mmap: sound_mmap,
504 open: sound_open,
505 release: sound_release,
506 };
507
508 /*
509 * Create the required special subdevices
510 */
511
create_special_devices(void)512 static int create_special_devices(void)
513 {
514 int seq1,seq2;
515 seq1=register_sound_special(&oss_sound_fops, 1);
516 if(seq1==-1)
517 goto bad;
518 seq2=register_sound_special(&oss_sound_fops, 8);
519 if(seq2!=-1)
520 return 0;
521 unregister_sound_special(1);
522 bad:
523 return -1;
524 }
525
526
527 /* These device names follow the official Linux device list,
528 * Documentation/devices.txt. Let us know if there are other
529 * common names we should support for compatibility.
530 * Only those devices not created by the generic code in sound_core.c are
531 * registered here.
532 */
533 static const struct {
534 unsigned short minor;
535 char *name;
536 umode_t mode;
537 int *num;
538 } dev_list[] = { /* list of minor devices */
539 /* seems to be some confusion here -- this device is not in the device list */
540 {SND_DEV_DSP16, "dspW", S_IWUGO | S_IRUSR | S_IRGRP,
541 &num_audiodevs},
542 {SND_DEV_AUDIO, "audio", S_IWUGO | S_IRUSR | S_IRGRP,
543 &num_audiodevs},
544 };
545
546 static char *
soundcard_make_name(char * buf,char * name,int idx)547 soundcard_make_name(char *buf, char *name, int idx) {
548 if (idx==0)
549 sprintf(buf, "sound/%s", name);
550 else
551 sprintf(buf, "sound/%s%d", name, idx);
552 return buf;
553 }
554
555 /* Register/unregister audio entries */
soundcard_register_devfs(int do_register)556 static void soundcard_register_devfs (int do_register)
557 {
558 char name_buf[32];
559 int i, j, num;
560
561 for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
562 num = (dev_list[i].num == NULL) ? 0 : *dev_list[i].num;
563 for (j = 0; j < num || j == 0; j++) {
564 soundcard_make_name (name_buf, dev_list[i].name, j);
565 if (do_register)
566 devfs_register (NULL, name_buf, DEVFS_FL_NONE,
567 SOUND_MAJOR, dev_list[i].minor+ (j* 0x10),
568 S_IFCHR | dev_list[i].mode,
569 &oss_sound_fops, NULL);
570 else {
571 devfs_handle_t de;
572
573 de = devfs_find_handle (NULL, name_buf, 0, 0,
574 DEVFS_SPECIAL_CHR, 0);
575 devfs_unregister (de);
576 }
577 }
578 }
579 }
580
581
582 static int dmabuf = 0;
583 static int dmabug = 0;
584
585 MODULE_PARM(dmabuf, "i");
586 MODULE_PARM(dmabug, "i");
587
oss_init(void)588 static int __init oss_init(void)
589 {
590 int err;
591
592 /* drag in sound_syms.o */
593 {
594 extern char sound_syms_symbol;
595 sound_syms_symbol = 0;
596 }
597
598 #ifdef CONFIG_PCI
599 if(dmabug)
600 isa_dma_bridge_buggy = dmabug;
601 #endif
602
603 err = create_special_devices();
604 if (err) {
605 printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
606 return err;
607 }
608
609 /* Protecting the innocent */
610 sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
611
612 soundcard_register_devfs(1);
613
614 if (sound_nblocks >= 1024)
615 printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
616
617 return 0;
618 }
619
oss_cleanup(void)620 static void __exit oss_cleanup(void)
621 {
622 int i;
623
624 if (MOD_IN_USE)
625 return;
626
627 soundcard_register_devfs (0);
628
629 unregister_sound_special(1);
630 unregister_sound_special(8);
631
632 sound_stop_timer();
633
634 sequencer_unload();
635
636 for (i = 0; i < MAX_DMA_CHANNELS; i++)
637 if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
638 printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
639 sound_free_dma(i);
640 }
641
642 for (i = 0; i < sound_nblocks; i++)
643 vfree(sound_mem_blocks[i]);
644
645 }
646
647 module_init(oss_init);
648 module_exit(oss_cleanup);
649 MODULE_LICENSE("GPL");
650
651
sound_alloc_dma(int chn,char * deviceID)652 int sound_alloc_dma(int chn, char *deviceID)
653 {
654 int err;
655
656 if ((err = request_dma(chn, deviceID)) != 0)
657 return err;
658
659 dma_alloc_map[chn] = DMA_MAP_FREE;
660
661 return 0;
662 }
663
sound_open_dma(int chn,char * deviceID)664 int sound_open_dma(int chn, char *deviceID)
665 {
666 unsigned long flags;
667
668 if (!valid_dma(chn)) {
669 printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
670 return 1;
671 }
672 save_flags(flags);
673 cli();
674
675 if (dma_alloc_map[chn] != DMA_MAP_FREE) {
676 printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
677 restore_flags(flags);
678 return 1;
679 }
680 dma_alloc_map[chn] = DMA_MAP_BUSY;
681 restore_flags(flags);
682 return 0;
683 }
684
sound_free_dma(int chn)685 void sound_free_dma(int chn)
686 {
687 if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) {
688 /* printk( "sound_free_dma: Bad access to DMA channel %d\n", chn); */
689 return;
690 }
691 free_dma(chn);
692 dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
693 }
694
sound_close_dma(int chn)695 void sound_close_dma(int chn)
696 {
697 unsigned long flags;
698
699 save_flags(flags);
700 cli();
701
702 if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
703 printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
704 restore_flags(flags);
705 return;
706 }
707 dma_alloc_map[chn] = DMA_MAP_FREE;
708 restore_flags(flags);
709 }
710
do_sequencer_timer(unsigned long dummy)711 static void do_sequencer_timer(unsigned long dummy)
712 {
713 sequencer_timer(0);
714 }
715
716
717 static struct timer_list seq_timer =
718 {function: do_sequencer_timer};
719
request_sound_timer(int count)720 void request_sound_timer(int count)
721 {
722 extern unsigned long seq_time;
723
724 if (count < 0) {
725 seq_timer.expires = (-count) + jiffies;
726 add_timer(&seq_timer);
727 return;
728 }
729 count += seq_time;
730
731 count -= jiffies;
732
733 if (count < 1)
734 count = 1;
735
736 seq_timer.expires = (count) + jiffies;
737 add_timer(&seq_timer);
738 }
739
sound_stop_timer(void)740 void sound_stop_timer(void)
741 {
742 del_timer(&seq_timer);;
743 }
744
conf_printf(char * name,struct address_info * hw_config)745 void conf_printf(char *name, struct address_info *hw_config)
746 {
747 #ifndef CONFIG_SOUND_TRACEINIT
748 return;
749 #else
750 printk("<%s> at 0x%03x", name, hw_config->io_base);
751
752 if (hw_config->irq)
753 printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
754
755 if (hw_config->dma != -1 || hw_config->dma2 != -1)
756 {
757 printk(" dma %d", hw_config->dma);
758 if (hw_config->dma2 != -1)
759 printk(",%d", hw_config->dma2);
760 }
761 printk("\n");
762 #endif
763 }
764
conf_printf2(char * name,int base,int irq,int dma,int dma2)765 void conf_printf2(char *name, int base, int irq, int dma, int dma2)
766 {
767 #ifndef CONFIG_SOUND_TRACEINIT
768 return;
769 #else
770 printk("<%s> at 0x%03x", name, base);
771
772 if (irq)
773 printk(" irq %d", (irq > 0) ? irq : -irq);
774
775 if (dma != -1 || dma2 != -1)
776 {
777 printk(" dma %d", dma);
778 if (dma2 != -1)
779 printk(",%d", dma2);
780 }
781 printk("\n");
782 #endif
783 }
784