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

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