sound/oss/soundcard.c

   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 <asm/dma.h>
  36 #include <asm/io.h>
  37 #include <linux/wait.h>
  38 #include <linux/slab.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/smp_lock.h>
  44 #include <linux/module.h>
  45 #include <linux/mm.h>
  46
  47 /*
  48  * This ought to be moved into include/asm/dma.h
  49  */
  50 #ifndef valid_dma
  51 #define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4)
  52 #endif
  53
  54 /*
  55  * Table for permanently allocated memory (used when unloading the module)
  56  */
  57 void *          sound_mem_blocks[1024];
  58 int             sound_nblocks = 0;
  59
  60 /* Persistent DMA buffers */
  61 #ifdef CONFIG_SOUND_DMAP
  62 int             sound_dmap_flag = 1;
  63 #else
  64 int             sound_dmap_flag = 0;
  65 #endif
  66
  67 static char     dma_alloc_map[MAX_DMA_CHANNELS];
  68
  69 #define DMA_MAP_UNAVAIL         0
  70 #define DMA_MAP_FREE            1
  71 #define DMA_MAP_BUSY            2
  72
  73
  74 unsigned long seq_time = 0;     /* Time for /dev/sequencer */
  75 extern struct class *sound_class;
  76
  77 /*
  78  * Table for configurable mixer volume handling
  79  */
  80 static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
  81 static int num_mixer_volumes;
  82
  83 int *load_mixer_volumes(char *name, int *levels, int present)
  84 {
  85         int             i, n;
  86
  87         for (i = 0; i < num_mixer_volumes; i++) {
  88                 if (strcmp(name, mixer_vols[i].name) == 0) {
  89                         if (present)
  90                                 mixer_vols[i].num = i;
  91                         return mixer_vols[i].levels;
  92                 }
  93         }
  94         if (num_mixer_volumes >= MAX_MIXER_DEV) {
  95                 printk(KERN_ERR "Sound: Too many mixers (%s)\n", name);
  96                 return levels;
  97         }
  98         n = num_mixer_volumes++;
  99
 100         strcpy(mixer_vols[n].name, name);
 101
 102         if (present)
 103                 mixer_vols[n].num = n;
 104         else
 105                 mixer_vols[n].num = -1;
 106
 107         for (i = 0; i < 32; i++)
 108                 mixer_vols[n].levels[i] = levels[i];
 109         return mixer_vols[n].levels;
 110 }
 111 EXPORT_SYMBOL(load_mixer_volumes);
 112
 113 static int set_mixer_levels(void __user * 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
 126 static int get_mixer_levels(void __user * arg)
 127 {
 128         int n;
 129
 130         if (__get_user(n, (int __user *)(&(((mixer_vol_table __user *)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 /* 4K page size but our output routines use some slack for overruns */
 140 #define PROC_BLOCK_SIZE (3*1024)
 141
 142 static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 143 {
 144         int dev = iminor(file->f_path.dentry->d_inode);
 145         int ret = -EINVAL;
 146
 147         /*
 148          *      The OSS drivers aren't remotely happy without this locking,
 149          *      and unless someone fixes them when they are about to bite the
 150          *      big one anyway, we might as well bandage here..
 151          */
 152
 153         lock_kernel();
 154
 155         DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
 156         switch (dev & 0x0f) {
 157         case SND_DEV_DSP:
 158         case SND_DEV_DSP16:
 159         case SND_DEV_AUDIO:
 160                 ret = audio_read(dev, file, buf, count);
 161                 break;
 162
 163         case SND_DEV_SEQ:
 164         case SND_DEV_SEQ2:
 165                 ret = sequencer_read(dev, file, buf, count);
 166                 break;
 167
 168         case SND_DEV_MIDIN:
 169                 ret = MIDIbuf_read(dev, file, buf, count);
 170         }
 171         unlock_kernel();
 172         return ret;
 173 }
 174
 175 static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 176 {
 177         int dev = iminor(file->f_path.dentry->d_inode);
 178         int ret = -EINVAL;
 179
 180         lock_kernel();
 181         DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
 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         unlock_kernel();
 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         DEB(printk("sound_open(dev=%d)\n", dev));
 208         if ((dev >= SND_NDEVS) || (dev < 0)) {
 209                 printk(KERN_ERR "Invalid minor device %d\n", dev);
 210                 return -ENXIO;
 211         }
 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                 if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
 219                         return -ENXIO;
 220
 221                 if (!try_module_get(mixer_devs[dev]->owner))
 222                         return -ENXIO;
 223                 break;
 224
 225         case SND_DEV_SEQ:
 226         case SND_DEV_SEQ2:
 227                 if ((retval = sequencer_open(dev, file)) < 0)
 228                         return retval;
 229                 break;
 230
 231         case SND_DEV_MIDIN:
 232                 if ((retval = MIDIbuf_open(dev, file)) < 0)
 233                         return retval;
 234                 break;
 235
 236         case SND_DEV_DSP:
 237         case SND_DEV_DSP16:
 238         case SND_DEV_AUDIO:
 239                 if ((retval = audio_open(dev, file)) < 0)
 240                         return retval;
 241                 break;
 242
 243         default:
 244                 printk(KERN_ERR "Invalid minor device %d\n", dev);
 245                 return -ENXIO;
 246         }
 247
 248         return 0;
 249 }
 250
 251 static int sound_release(struct inode *inode, struct file *file)
 252 {
 253         int dev = iminor(inode);
 254
 255         lock_kernel();
 256         DEB(printk("sound_release(dev=%d)\n", dev));
 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         unlock_kernel();
 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 int sound_ioctl(struct inode *inode, struct file *file,
 330                        unsigned int cmd, unsigned long arg)
 331 {
 332         int len = 0, dtype;
 333         int dev = iminor(inode);
 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         DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
 351         if (cmd == OSS_GETVERSION)
 352                 return __put_user(SOUND_VERSION, (int __user *)p);
 353
 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                         return sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
 362                                                  cmd, p);
 363
 364                 default:
 365                         return sound_mixer_ioctl(dev >> 4, cmd, p);
 366                 }
 367         }
 368         switch (dev & 0x0f) {
 369         case SND_DEV_CTL:
 370                 if (cmd == SOUND_MIXER_GETLEVELS)
 371                         return get_mixer_levels(p);
 372                 if (cmd == SOUND_MIXER_SETLEVELS)
 373                         return set_mixer_levels(p);
 374                 return sound_mixer_ioctl(dev >> 4, cmd, p);
 375
 376         case SND_DEV_SEQ:
 377         case SND_DEV_SEQ2:
 378                 return sequencer_ioctl(dev, file, cmd, p);
 379
 380         case SND_DEV_DSP:
 381         case SND_DEV_DSP16:
 382         case SND_DEV_AUDIO:
 383                 return audio_ioctl(dev, file, cmd, p);
 384                 break;
 385
 386         case SND_DEV_MIDIN:
 387                 return MIDIbuf_ioctl(dev, file, cmd, p);
 388                 break;
 389
 390         }
 391         return -EINVAL;
 392 }
 393
 394 static unsigned int sound_poll(struct file *file, poll_table * wait)
 395 {
 396         struct inode *inode = file->f_path.dentry->d_inode;
 397         int dev = iminor(inode);
 398
 399         DEB(printk("sound_poll(dev=%d)\n", dev));
 400         switch (dev & 0x0f) {
 401         case SND_DEV_SEQ:
 402         case SND_DEV_SEQ2:
 403                 return sequencer_poll(dev, file, wait);
 404
 405         case SND_DEV_MIDIN:
 406                 return MIDIbuf_poll(dev, file, wait);
 407
 408         case SND_DEV_DSP:
 409         case SND_DEV_DSP16:
 410         case SND_DEV_AUDIO:
 411                 return DMAbuf_poll(file, dev >> 4, wait);
 412         }
 413         return 0;
 414 }
 415
 416 static int sound_mmap(struct file *file, struct vm_area_struct *vma)
 417 {
 418         int dev_class;
 419         unsigned long size;
 420         struct dma_buffparms *dmap = NULL;
 421         int dev = iminor(file->f_path.dentry->d_inode);
 422
 423         dev_class = dev & 0x0f;
 424         dev >>= 4;
 425
 426         if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
 427                 printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
 428                 return -EINVAL;
 429         }
 430         lock_kernel();
 431         if (vma->vm_flags & VM_WRITE)   /* Map write and read/write to the output buf */
 432                 dmap = audio_devs[dev]->dmap_out;
 433         else if (vma->vm_flags & VM_READ)
 434                 dmap = audio_devs[dev]->dmap_in;
 435         else {
 436                 printk(KERN_ERR "Sound: Undefined mmap() access\n");
 437                 unlock_kernel();
 438                 return -EINVAL;
 439         }
 440
 441         if (dmap == NULL) {
 442                 printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
 443                 unlock_kernel();
 444                 return -EIO;
 445         }
 446         if (dmap->raw_buf == NULL) {
 447                 printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
 448                 unlock_kernel();
 449                 return -EIO;
 450         }
 451         if (dmap->mapping_flags) {
 452                 printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
 453                 unlock_kernel();
 454                 return -EIO;
 455         }
 456         if (vma->vm_pgoff != 0) {
 457                 printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
 458                 unlock_kernel();
 459                 return -EINVAL;
 460         }
 461         size = vma->vm_end - vma->vm_start;
 462
 463         if (size != dmap->bytes_in_use) {
 464                 printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
 465         }
 466         if (remap_pfn_range(vma, vma->vm_start,
 467                         virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
 468                         vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
 469                 unlock_kernel();
 470                 return -EAGAIN;
 471         }
 472
 473         dmap->mapping_flags |= DMA_MAP_MAPPED;
 474
 475         if( audio_devs[dev]->d->mmap)
 476                 audio_devs[dev]->d->mmap(dev);
 477
 478         memset(dmap->raw_buf,
 479                dmap->neutral_byte,
 480                dmap->bytes_in_use);
 481         unlock_kernel();
 482         return 0;
 483 }
 484
 485 struct file_operations oss_sound_fops = {
 486         .owner          = THIS_MODULE,
 487         .llseek         = no_llseek,
 488         .read           = sound_read,
 489         .write          = sound_write,
 490         .poll           = sound_poll,
 491         .ioctl          = sound_ioctl,
 492         .mmap           = sound_mmap,
 493         .open           = sound_open,
 494         .release        = sound_release,
 495 };
 496
 497 /*
 498  *      Create the required special subdevices
 499  */
 500
 501 static int create_special_devices(void)
 502 {
 503         int seq1,seq2;
 504         seq1=register_sound_special(&oss_sound_fops, 1);
 505         if(seq1==-1)
 506                 goto bad;
 507         seq2=register_sound_special(&oss_sound_fops, 8);
 508         if(seq2!=-1)
 509                 return 0;
 510         unregister_sound_special(1);
 511 bad:
 512         return -1;
 513 }
 514
 515
 516 /* These device names follow the official Linux device list,
 517  * Documentation/devices.txt.  Let us know if there are other
 518  * common names we should support for compatibility.
 519  * Only those devices not created by the generic code in sound_core.c are
 520  * registered here.
 521  */
 522 static const struct {
 523         unsigned short minor;
 524         char *name;
 525         umode_t mode;
 526         int *num;
 527 } dev_list[] = { /* list of minor devices */
 528 /* seems to be some confusion here -- this device is not in the device list */
 529         {SND_DEV_DSP16,     "dspW",      S_IWUGO | S_IRUSR | S_IRGRP,
 530          &num_audiodevs},
 531         {SND_DEV_AUDIO,     "audio",     S_IWUGO | S_IRUSR | S_IRGRP,
 532          &num_audiodevs},
 533 };
 534
 535 static int dmabuf;
 536 static int dmabug;
 537
 538 module_param(dmabuf, int, 0444);
 539 module_param(dmabug, int, 0444);
 540
 541 static int __init oss_init(void)
 542 {
 543         int             err;
 544         int i, j;
 545
 546 #ifdef CONFIG_PCI
 547         if(dmabug)
 548                 isa_dma_bridge_buggy = dmabug;
 549 #endif
 550
 551         err = create_special_devices();
 552         if (err) {
 553                 printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
 554                 return err;
 555         }
 556
 557         /* Protecting the innocent */
 558         sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
 559
 560         for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
 561                 device_create(sound_class, NULL,
 562                               MKDEV(SOUND_MAJOR, dev_list[i].minor),
 563                               "%s", dev_list[i].name);
 564
 565                 if (!dev_list[i].num)
 566                         continue;
 567
 568                 for (j = 1; j < *dev_list[i].num; j++)
 569                         device_create(sound_class, NULL,
 570                                       MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)),
 571                                       "%s%d", dev_list[i].name, j);
 572         }
 573
 574         if (sound_nblocks >= 1024)
 575                 printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
 576
 577         return 0;
 578 }
 579
 580 static void __exit oss_cleanup(void)
 581 {
 582         int i, j;
 583
 584         for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
 585                 device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
 586                 if (!dev_list[i].num)
 587                         continue;
 588                 for (j = 1; j < *dev_list[i].num; j++)
 589                         device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
 590         }
 591
 592         unregister_sound_special(1);
 593         unregister_sound_special(8);
 594
 595         sound_stop_timer();
 596
 597         sequencer_unload();
 598
 599         for (i = 0; i < MAX_DMA_CHANNELS; i++)
 600                 if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
 601                         printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
 602                         sound_free_dma(i);
 603                 }
 604
 605         for (i = 0; i < sound_nblocks; i++)
 606                 vfree(sound_mem_blocks[i]);
 607
 608 }
 609
 610 module_init(oss_init);
 611 module_exit(oss_cleanup);
 612 MODULE_LICENSE("GPL");
 613 MODULE_DESCRIPTION("OSS Sound subsystem");
 614 MODULE_AUTHOR("Hannu Savolainen, et al.");
 615
 616
 617 int sound_alloc_dma(int chn, char *deviceID)
 618 {
 619         int err;
 620
 621         if ((err = request_dma(chn, deviceID)) != 0)
 622                 return err;
 623
 624         dma_alloc_map[chn] = DMA_MAP_FREE;
 625
 626         return 0;
 627 }
 628 EXPORT_SYMBOL(sound_alloc_dma);
 629
 630 int sound_open_dma(int chn, char *deviceID)
 631 {
 632         if (!valid_dma(chn)) {
 633                 printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
 634                 return 1;
 635         }
 636
 637         if (dma_alloc_map[chn] != DMA_MAP_FREE) {
 638                 printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
 639                 return 1;
 640         }
 641         dma_alloc_map[chn] = DMA_MAP_BUSY;
 642         return 0;
 643 }
 644 EXPORT_SYMBOL(sound_open_dma);
 645
 646 void sound_free_dma(int chn)
 647 {
 648         if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) {
 649                 /* printk( "sound_free_dma: Bad access to DMA channel %d\n",  chn); */
 650                 return;
 651         }
 652         free_dma(chn);
 653         dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
 654 }
 655 EXPORT_SYMBOL(sound_free_dma);
 656
 657 void sound_close_dma(int chn)
 658 {
 659         if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
 660                 printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
 661                 return;
 662         }
 663         dma_alloc_map[chn] = DMA_MAP_FREE;
 664 }
 665 EXPORT_SYMBOL(sound_close_dma);
 666
 667 static void do_sequencer_timer(unsigned long dummy)
 668 {
 669         sequencer_timer(0);
 670 }
 671
 672
 673 static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);
 674
 675 void request_sound_timer(int count)
 676 {
 677         extern unsigned long seq_time;
 678
 679         if (count < 0) {
 680                 seq_timer.expires = (-count) + jiffies;
 681                 add_timer(&seq_timer);
 682                 return;
 683         }
 684         count += seq_time;
 685
 686         count -= jiffies;
 687
 688         if (count < 1)
 689                 count = 1;
 690
 691         seq_timer.expires = (count) + jiffies;
 692         add_timer(&seq_timer);
 693 }
 694
 695 void sound_stop_timer(void)
 696 {
 697         del_timer(&seq_timer);
 698 }
 699
 700 void conf_printf(char *name, struct address_info *hw_config)
 701 {
 702 #ifndef CONFIG_SOUND_TRACEINIT
 703         return;
 704 #else
 705         printk("<%s> at 0x%03x", name, hw_config->io_base);
 706
 707         if (hw_config->irq)
 708                 printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
 709
 710         if (hw_config->dma != -1 || hw_config->dma2 != -1)
 711         {
 712                 printk(" dma %d", hw_config->dma);
 713                 if (hw_config->dma2 != -1)
 714                         printk(",%d", hw_config->dma2);
 715         }
 716         printk("\n");
 717 #endif
 718 }
 719 EXPORT_SYMBOL(conf_printf);
 720
 721 void conf_printf2(char *name, int base, int irq, int dma, int dma2)
 722 {
 723 #ifndef CONFIG_SOUND_TRACEINIT
 724         return;
 725 #else
 726         printk("<%s> at 0x%03x", name, base);
 727
 728         if (irq)
 729                 printk(" irq %d", (irq > 0) ? irq : -irq);
 730
 731         if (dma != -1 || dma2 != -1)
 732         {
 733                   printk(" dma %d", dma);
 734                   if (dma2 != -1)
 735                           printk(",%d", dma2);
 736         }
 737         printk("\n");
 738 #endif
 739 }
 740 EXPORT_SYMBOL(conf_printf2);
 741