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TOMOYO Linux Cross Reference
Linux/sound/oss/soundcard.c

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  1 /*
  2  * linux/sound/oss/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 
 26 #include "sound_config.h"
 27 #include <linux/init.h>
 28 #include <linux/types.h>
 29 #include <linux/errno.h>
 30 #include <linux/signal.h>
 31 #include <linux/fcntl.h>
 32 #include <linux/ctype.h>
 33 #include <linux/stddef.h>
 34 #include <linux/kmod.h>
 35 #include <linux/kernel.h>
 36 #include <asm/dma.h>
 37 #include <asm/io.h>
 38 #include <linux/wait.h>
 39 #include <linux/ioport.h>
 40 #include <linux/major.h>
 41 #include <linux/delay.h>
 42 #include <linux/proc_fs.h>
 43 #include <linux/mutex.h>
 44 #include <linux/module.h>
 45 #include <linux/mm.h>
 46 #include <linux/device.h>
 47 
 48 /*
 49  * This ought to be moved into include/asm/dma.h
 50  */
 51 #ifndef valid_dma
 52 #define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4)
 53 #endif
 54 
 55 /*
 56  * Table for permanently allocated memory (used when unloading the module)
 57  */
 58 void *          sound_mem_blocks[MAX_MEM_BLOCKS];
 59 static DEFINE_MUTEX(soundcard_mutex);
 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];
 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 extern struct class *sound_class;
 78 
 79 /*
 80  * Table for configurable mixer volume handling
 81  */
 82 static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
 83 static int num_mixer_volumes;
 84 
 85 int *load_mixer_volumes(char *name, int *levels, int present)
 86 {
 87         int             i, n;
 88 
 89         for (i = 0; i < num_mixer_volumes; i++) {
 90                 if (strncmp(name, mixer_vols[i].name, 32) == 0) {
 91                         if (present)
 92                                 mixer_vols[i].num = i;
 93                         return mixer_vols[i].levels;
 94                 }
 95         }
 96         if (num_mixer_volumes >= MAX_MIXER_DEV) {
 97                 printk(KERN_ERR "Sound: Too many mixers (%s)\n", name);
 98                 return levels;
 99         }
100         n = num_mixer_volumes++;
101 
102         strncpy(mixer_vols[n].name, name, 32);
103 
104         if (present)
105                 mixer_vols[n].num = n;
106         else
107                 mixer_vols[n].num = -1;
108 
109         for (i = 0; i < 32; i++)
110                 mixer_vols[n].levels[i] = levels[i];
111         return mixer_vols[n].levels;
112 }
113 EXPORT_SYMBOL(load_mixer_volumes);
114 
115 static int set_mixer_levels(void __user * arg)
116 {
117         /* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */
118         mixer_vol_table buf;   
119 
120         if (__copy_from_user(&buf, arg, sizeof(buf)))
121                 return -EFAULT;
122         load_mixer_volumes(buf.name, buf.levels, 0);
123         if (__copy_to_user(arg, &buf, sizeof(buf)))
124                 return -EFAULT;
125         return 0;
126 }
127 
128 static int get_mixer_levels(void __user * arg)
129 {
130         int n;
131 
132         if (__get_user(n, (int __user *)(&(((mixer_vol_table __user *)arg)->num))))
133                 return -EFAULT;
134         if (n < 0 || n >= num_mixer_volumes)
135                 return -EINVAL;
136         if (__copy_to_user(arg, &mixer_vols[n], sizeof(mixer_vol_table)))
137                 return -EFAULT;
138         return 0;
139 }
140 
141 /* 4K page size but our output routines use some slack for overruns */
142 #define PROC_BLOCK_SIZE (3*1024)
143 
144 static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
145 {
146         int dev = iminor(file->f_path.dentry->d_inode);
147         int ret = -EINVAL;
148 
149         /*
150          *      The OSS drivers aren't remotely happy without this locking,
151          *      and unless someone fixes them when they are about to bite the
152          *      big one anyway, we might as well bandage here..
153          */
154          
155         mutex_lock(&soundcard_mutex);
156         
157         DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
158         switch (dev & 0x0f) {
159         case SND_DEV_DSP:
160         case SND_DEV_DSP16:
161         case SND_DEV_AUDIO:
162                 ret = audio_read(dev, file, buf, count);
163                 break;
164 
165         case SND_DEV_SEQ:
166         case SND_DEV_SEQ2:
167                 ret = sequencer_read(dev, file, buf, count);
168                 break;
169 
170         case SND_DEV_MIDIN:
171                 ret = MIDIbuf_read(dev, file, buf, count);
172         }
173         mutex_unlock(&soundcard_mutex);
174         return ret;
175 }
176 
177 static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
178 {
179         int dev = iminor(file->f_path.dentry->d_inode);
180         int ret = -EINVAL;
181         
182         mutex_lock(&soundcard_mutex);
183         DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
184         switch (dev & 0x0f) {
185         case SND_DEV_SEQ:
186         case SND_DEV_SEQ2:
187                 ret =  sequencer_write(dev, file, buf, count);
188                 break;
189 
190         case SND_DEV_DSP:
191         case SND_DEV_DSP16:
192         case SND_DEV_AUDIO:
193                 ret = audio_write(dev, file, buf, count);
194                 break;
195 
196         case SND_DEV_MIDIN:
197                 ret =  MIDIbuf_write(dev, file, buf, count);
198                 break;
199         }
200         mutex_unlock(&soundcard_mutex);
201         return ret;
202 }
203 
204 static int sound_open(struct inode *inode, struct file *file)
205 {
206         int dev = iminor(inode);
207         int retval;
208 
209         DEB(printk("sound_open(dev=%d)\n", dev));
210         if ((dev >= SND_NDEVS) || (dev < 0)) {
211                 printk(KERN_ERR "Invalid minor device %d\n", dev);
212                 return -ENXIO;
213         }
214         mutex_lock(&soundcard_mutex);
215         switch (dev & 0x0f) {
216         case SND_DEV_CTL:
217                 dev >>= 4;
218                 if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
219                         request_module("mixer%d", dev);
220                 }
221                 retval = -ENXIO;
222                 if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
223                         break;
224         
225                 if (!try_module_get(mixer_devs[dev]->owner))
226                         break;
227 
228                 retval = 0;
229                 break;
230 
231         case SND_DEV_SEQ:
232         case SND_DEV_SEQ2:
233                 retval = sequencer_open(dev, file);
234                 break;
235 
236         case SND_DEV_MIDIN:
237                 retval = MIDIbuf_open(dev, file);
238                 break;
239 
240         case SND_DEV_DSP:
241         case SND_DEV_DSP16:
242         case SND_DEV_AUDIO:
243                 retval = audio_open(dev, file);
244                 break;
245 
246         default:
247                 printk(KERN_ERR "Invalid minor device %d\n", dev);
248                 retval = -ENXIO;
249         }
250 
251         mutex_unlock(&soundcard_mutex);
252         return retval;
253 }
254 
255 static int sound_release(struct inode *inode, struct file *file)
256 {
257         int dev = iminor(inode);
258 
259         mutex_lock(&soundcard_mutex);
260         DEB(printk("sound_release(dev=%d)\n", dev));
261         switch (dev & 0x0f) {
262         case SND_DEV_CTL:
263                 module_put(mixer_devs[dev >> 4]->owner);
264                 break;
265                 
266         case SND_DEV_SEQ:
267         case SND_DEV_SEQ2:
268                 sequencer_release(dev, file);
269                 break;
270 
271         case SND_DEV_MIDIN:
272                 MIDIbuf_release(dev, file);
273                 break;
274 
275         case SND_DEV_DSP:
276         case SND_DEV_DSP16:
277         case SND_DEV_AUDIO:
278                 audio_release(dev, file);
279                 break;
280 
281         default:
282                 printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
283         }
284         mutex_unlock(&soundcard_mutex);
285 
286         return 0;
287 }
288 
289 static int get_mixer_info(int dev, void __user *arg)
290 {
291         mixer_info info;
292         memset(&info, 0, sizeof(info));
293         strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
294         strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
295         info.modify_counter = mixer_devs[dev]->modify_counter;
296         if (__copy_to_user(arg, &info,  sizeof(info)))
297                 return -EFAULT;
298         return 0;
299 }
300 
301 static int get_old_mixer_info(int dev, void __user *arg)
302 {
303         _old_mixer_info info;
304         memset(&info, 0, sizeof(info));
305         strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
306         strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
307         if (copy_to_user(arg, &info,  sizeof(info)))
308                 return -EFAULT;
309         return 0;
310 }
311 
312 static int sound_mixer_ioctl(int mixdev, unsigned int cmd, void __user *arg)
313 {
314         if (mixdev < 0 || mixdev >= MAX_MIXER_DEV)
315                 return -ENXIO;
316         /* Try to load the mixer... */
317         if (mixer_devs[mixdev] == NULL) {
318                 request_module("mixer%d", mixdev);
319         }
320         if (mixdev >= num_mixers || !mixer_devs[mixdev])
321                 return -ENXIO;
322         if (cmd == SOUND_MIXER_INFO)
323                 return get_mixer_info(mixdev, arg);
324         if (cmd == SOUND_OLD_MIXER_INFO)
325                 return get_old_mixer_info(mixdev, arg);
326         if (_SIOC_DIR(cmd) & _SIOC_WRITE)
327                 mixer_devs[mixdev]->modify_counter++;
328         if (!mixer_devs[mixdev]->ioctl)
329                 return -EINVAL;
330         return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg);
331 }
332 
333 static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
334 {
335         int len = 0, dtype;
336         int dev = iminor(file->f_dentry->d_inode);
337         long ret = -EINVAL;
338         void __user *p = (void __user *)arg;
339 
340         if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
341                 /*
342                  * Have to validate the address given by the process.
343                  */
344                 len = _SIOC_SIZE(cmd);
345                 if (len < 1 || len > 65536 || !p)
346                         return -EFAULT;
347                 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
348                         if (!access_ok(VERIFY_READ, p, len))
349                                 return -EFAULT;
350                 if (_SIOC_DIR(cmd) & _SIOC_READ)
351                         if (!access_ok(VERIFY_WRITE, p, len))
352                                 return -EFAULT;
353         }
354         DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
355         if (cmd == OSS_GETVERSION)
356                 return __put_user(SOUND_VERSION, (int __user *)p);
357         
358         mutex_lock(&soundcard_mutex);
359         if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 &&   /* Mixer ioctl */
360             (dev & 0x0f) != SND_DEV_CTL) {              
361                 dtype = dev & 0x0f;
362                 switch (dtype) {
363                 case SND_DEV_DSP:
364                 case SND_DEV_DSP16:
365                 case SND_DEV_AUDIO:
366                         ret = sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
367                                                  cmd, p);
368                         break;                  
369                 default:
370                         ret = sound_mixer_ioctl(dev >> 4, cmd, p);
371                         break;
372                 }
373                 mutex_unlock(&soundcard_mutex);
374                 return ret;
375         }
376 
377         switch (dev & 0x0f) {
378         case SND_DEV_CTL:
379                 if (cmd == SOUND_MIXER_GETLEVELS)
380                         ret = get_mixer_levels(p);
381                 else if (cmd == SOUND_MIXER_SETLEVELS)
382                         ret = set_mixer_levels(p);
383                 else
384                         ret = sound_mixer_ioctl(dev >> 4, cmd, p);
385                 break;
386 
387         case SND_DEV_SEQ:
388         case SND_DEV_SEQ2:
389                 ret = sequencer_ioctl(dev, file, cmd, p);
390                 break;
391 
392         case SND_DEV_DSP:
393         case SND_DEV_DSP16:
394         case SND_DEV_AUDIO:
395                 ret = audio_ioctl(dev, file, cmd, p);
396                 break;
397 
398         case SND_DEV_MIDIN:
399                 ret = MIDIbuf_ioctl(dev, file, cmd, p);
400                 break;
401 
402         }
403         mutex_unlock(&soundcard_mutex);
404         return ret;
405 }
406 
407 static unsigned int sound_poll(struct file *file, poll_table * wait)
408 {
409         struct inode *inode = file->f_path.dentry->d_inode;
410         int dev = iminor(inode);
411 
412         DEB(printk("sound_poll(dev=%d)\n", dev));
413         switch (dev & 0x0f) {
414         case SND_DEV_SEQ:
415         case SND_DEV_SEQ2:
416                 return sequencer_poll(dev, file, wait);
417 
418         case SND_DEV_MIDIN:
419                 return MIDIbuf_poll(dev, file, wait);
420 
421         case SND_DEV_DSP:
422         case SND_DEV_DSP16:
423         case SND_DEV_AUDIO:
424                 return DMAbuf_poll(file, dev >> 4, wait);
425         }
426         return 0;
427 }
428 
429 static int sound_mmap(struct file *file, struct vm_area_struct *vma)
430 {
431         int dev_class;
432         unsigned long size;
433         struct dma_buffparms *dmap = NULL;
434         int dev = iminor(file->f_path.dentry->d_inode);
435 
436         dev_class = dev & 0x0f;
437         dev >>= 4;
438 
439         if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
440                 printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
441                 return -EINVAL;
442         }
443         mutex_lock(&soundcard_mutex);
444         if (vma->vm_flags & VM_WRITE)   /* Map write and read/write to the output buf */
445                 dmap = audio_devs[dev]->dmap_out;
446         else if (vma->vm_flags & VM_READ)
447                 dmap = audio_devs[dev]->dmap_in;
448         else {
449                 printk(KERN_ERR "Sound: Undefined mmap() access\n");
450                 mutex_unlock(&soundcard_mutex);
451                 return -EINVAL;
452         }
453 
454         if (dmap == NULL) {
455                 printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
456                 mutex_unlock(&soundcard_mutex);
457                 return -EIO;
458         }
459         if (dmap->raw_buf == NULL) {
460                 printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
461                 mutex_unlock(&soundcard_mutex);
462                 return -EIO;
463         }
464         if (dmap->mapping_flags) {
465                 printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
466                 mutex_unlock(&soundcard_mutex);
467                 return -EIO;
468         }
469         if (vma->vm_pgoff != 0) {
470                 printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
471                 mutex_unlock(&soundcard_mutex);
472                 return -EINVAL;
473         }
474         size = vma->vm_end - vma->vm_start;
475 
476         if (size != dmap->bytes_in_use) {
477                 printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
478         }
479         if (remap_pfn_range(vma, vma->vm_start,
480                         virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
481                         vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
482                 mutex_unlock(&soundcard_mutex);
483                 return -EAGAIN;
484         }
485 
486         dmap->mapping_flags |= DMA_MAP_MAPPED;
487 
488         if( audio_devs[dev]->d->mmap)
489                 audio_devs[dev]->d->mmap(dev);
490 
491         memset(dmap->raw_buf,
492                dmap->neutral_byte,
493                dmap->bytes_in_use);
494         mutex_unlock(&soundcard_mutex);
495         return 0;
496 }
497 
498 const struct file_operations oss_sound_fops = {
499         .owner          = THIS_MODULE,
500         .llseek         = no_llseek,
501         .read           = sound_read,
502         .write          = sound_write,
503         .poll           = sound_poll,
504         .unlocked_ioctl = sound_ioctl,
505         .mmap           = sound_mmap,
506         .open           = sound_open,
507         .release        = sound_release,
508 };
509 
510 /*
511  *      Create the required special subdevices
512  */
513  
514 static int create_special_devices(void)
515 {
516         int seq1,seq2;
517         seq1=register_sound_special(&oss_sound_fops, 1);
518         if(seq1==-1)
519                 goto bad;
520         seq2=register_sound_special(&oss_sound_fops, 8);
521         if(seq2!=-1)
522                 return 0;
523         unregister_sound_special(1);
524 bad:
525         return -1;
526 }
527 
528 
529 static int dmabuf;
530 static int dmabug;
531 
532 module_param(dmabuf, int, 0444);
533 module_param(dmabug, int, 0444);
534 
535 /* additional minors for compatibility */
536 struct oss_minor_dev {
537         unsigned short minor;
538         unsigned int enabled;
539 } dev_list[] = {
540         { SND_DEV_DSP16 },
541         { SND_DEV_AUDIO },
542 };
543 
544 static int __init oss_init(void)
545 {
546         int             err;
547         int i, j;
548         
549 #ifdef CONFIG_PCI
550         if(dmabug)
551                 isa_dma_bridge_buggy = dmabug;
552 #endif
553 
554         err = create_special_devices();
555         if (err) {
556                 printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
557                 return err;
558         }
559 
560         /* Protecting the innocent */
561         sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
562 
563         for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
564                 j = 0;
565                 do {
566                         unsigned short minor = dev_list[i].minor + j * 0x10;
567                         if (!register_sound_special(&oss_sound_fops, minor))
568                                 dev_list[i].enabled = (1 << j);
569                 } while (++j < num_audiodevs);
570         }
571 
572         if (sound_nblocks >= MAX_MEM_BLOCKS - 1)
573                 printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
574         
575         return 0;
576 }
577 
578 static void __exit oss_cleanup(void)
579 {
580         int i, j;
581 
582         for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
583                 j = 0;
584                 do {
585                         if (dev_list[i].enabled & (1 << j))
586                                 unregister_sound_special(dev_list[i].minor);
587                 } while (++j < num_audiodevs);
588         }
589         
590         unregister_sound_special(1);
591         unregister_sound_special(8);
592 
593         sound_stop_timer();
594 
595         sequencer_unload();
596 
597         for (i = 0; i < MAX_DMA_CHANNELS; i++)
598                 if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
599                         printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
600                         sound_free_dma(i);
601                 }
602 
603         for (i = 0; i < sound_nblocks; i++)
604                 vfree(sound_mem_blocks[i]);
605 
606 }
607 
608 module_init(oss_init);
609 module_exit(oss_cleanup);
610 MODULE_LICENSE("GPL");
611 MODULE_DESCRIPTION("OSS Sound subsystem");
612 MODULE_AUTHOR("Hannu Savolainen, et al.");
613 
614 
615 int sound_alloc_dma(int chn, char *deviceID)
616 {
617         int err;
618 
619         if ((err = request_dma(chn, deviceID)) != 0)
620                 return err;
621 
622         dma_alloc_map[chn] = DMA_MAP_FREE;
623 
624         return 0;
625 }
626 EXPORT_SYMBOL(sound_alloc_dma);
627 
628 int sound_open_dma(int chn, char *deviceID)
629 {
630         if (!valid_dma(chn)) {
631                 printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
632                 return 1;
633         }
634 
635         if (dma_alloc_map[chn] != DMA_MAP_FREE) {
636                 printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
637                 return 1;
638         }
639         dma_alloc_map[chn] = DMA_MAP_BUSY;
640         return 0;
641 }
642 EXPORT_SYMBOL(sound_open_dma);
643 
644 void sound_free_dma(int chn)
645 {
646         if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) {
647                 /* printk( "sound_free_dma: Bad access to DMA channel %d\n",  chn); */
648                 return;
649         }
650         free_dma(chn);
651         dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
652 }
653 EXPORT_SYMBOL(sound_free_dma);
654 
655 void sound_close_dma(int chn)
656 {
657         if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
658                 printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
659                 return;
660         }
661         dma_alloc_map[chn] = DMA_MAP_FREE;
662 }
663 EXPORT_SYMBOL(sound_close_dma);
664 
665 static void do_sequencer_timer(unsigned long dummy)
666 {
667         sequencer_timer(0);
668 }
669 
670 
671 static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);
672 
673 void request_sound_timer(int count)
674 {
675         extern unsigned long seq_time;
676 
677         if (count < 0) {
678                 seq_timer.expires = (-count) + jiffies;
679                 add_timer(&seq_timer);
680                 return;
681         }
682         count += seq_time;
683 
684         count -= jiffies;
685 
686         if (count < 1)
687                 count = 1;
688 
689         seq_timer.expires = (count) + jiffies;
690         add_timer(&seq_timer);
691 }
692 
693 void sound_stop_timer(void)
694 {
695         del_timer(&seq_timer);
696 }
697 
698 void conf_printf(char *name, struct address_info *hw_config)
699 {
700 #ifndef CONFIG_SOUND_TRACEINIT
701         return;
702 #else
703         printk("<%s> at 0x%03x", name, hw_config->io_base);
704 
705         if (hw_config->irq)
706                 printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
707 
708         if (hw_config->dma != -1 || hw_config->dma2 != -1)
709         {
710                 printk(" dma %d", hw_config->dma);
711                 if (hw_config->dma2 != -1)
712                         printk(",%d", hw_config->dma2);
713         }
714         printk("\n");
715 #endif
716 }
717 EXPORT_SYMBOL(conf_printf);
718 
719 void conf_printf2(char *name, int base, int irq, int dma, int dma2)
720 {
721 #ifndef CONFIG_SOUND_TRACEINIT
722         return;
723 #else
724         printk("<%s> at 0x%03x", name, base);
725 
726         if (irq)
727                 printk(" irq %d", (irq > 0) ? irq : -irq);
728 
729         if (dma != -1 || dma2 != -1)
730         {
731                   printk(" dma %d", dma);
732                   if (dma2 != -1)
733                           printk(",%d", dma2);
734         }
735         printk("\n");
736 #endif
737 }
738 EXPORT_SYMBOL(conf_printf2);
739 
740 

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