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
  46 /*
  47  * This ought to be moved into include/asm/dma.h
  48  */
  49 #ifndef valid_dma
  50 #define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4)
  51 #endif
  52
  53 /*
  54  * Table for permanently allocated memory (used when unloading the module)
  55  */
  56 void *          sound_mem_blocks[1024];
  57 int             sound_nblocks = 0;
  58
  59 /* Persistent DMA buffers */
  60 #ifdef CONFIG_SOUND_DMAP
  61 int             sound_dmap_flag = 1;
  62 #else
  63 int             sound_dmap_flag = 0;
  64 #endif
  65
  66 static char     dma_alloc_map[MAX_DMA_CHANNELS];
  67
  68 #define DMA_MAP_UNAVAIL         0
  69 #define DMA_MAP_FREE            1
  70 #define DMA_MAP_BUSY            2
  71
  72
  73 unsigned long seq_time = 0;     /* Time for /dev/sequencer */
  74 extern struct class *sound_class;
  75
  76 /*
  77  * Table for configurable mixer volume handling
  78  */
  79 static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
  80 static int num_mixer_volumes;
  81
  82 int *load_mixer_volumes(char *name, int *levels, int present)
  83 {
  84         int             i, n;
  85
  86         for (i = 0; i < num_mixer_volumes; i++) {
  87                 if (strcmp(name, mixer_vols[i].name) == 0) {
  88                         if (present)
  89                                 mixer_vols[i].num = i;
  90                         return mixer_vols[i].levels;
  91                 }
  92         }
  93         if (num_mixer_volumes >= MAX_MIXER_DEV) {
  94                 printk(KERN_ERR "Sound: Too many mixers (%s)\n", name);
  95                 return levels;
  96         }
  97         n = num_mixer_volumes++;
  98
  99         strcpy(mixer_vols[n].name, name);
 100
 101         if (present)
 102                 mixer_vols[n].num = n;
 103         else
 104                 mixer_vols[n].num = -1;
 105
 106         for (i = 0; i < 32; i++)
 107                 mixer_vols[n].levels[i] = levels[i];
 108         return mixer_vols[n].levels;
 109 }
 110
 111 static int set_mixer_levels(void __user * arg)
 112 {
 113         /* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */
 114         mixer_vol_table buf;
 115
 116         if (__copy_from_user(&buf, arg, sizeof(buf)))
 117                 return -EFAULT;
 118         load_mixer_volumes(buf.name, buf.levels, 0);
 119         if (__copy_to_user(arg, &buf, sizeof(buf)))
 120                 return -EFAULT;
 121         return 0;
 122 }
 123
 124 static int get_mixer_levels(void __user * arg)
 125 {
 126         int n;
 127
 128         if (__get_user(n, (int __user *)(&(((mixer_vol_table __user *)arg)->num))))
 129                 return -EFAULT;
 130         if (n < 0 || n >= num_mixer_volumes)
 131                 return -EINVAL;
 132         if (__copy_to_user(arg, &mixer_vols[n], sizeof(mixer_vol_table)))
 133                 return -EFAULT;
 134         return 0;
 135 }
 136
 137 /* 4K page size but our output routines use some slack for overruns */
 138 #define PROC_BLOCK_SIZE (3*1024)
 139
 140 static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 141 {
 142         int dev = iminor(file->f_dentry->d_inode);
 143         int ret = -EINVAL;
 144
 145         /*
 146          *      The OSS drivers aren't remotely happy without this locking,
 147          *      and unless someone fixes them when they are about to bite the
 148          *      big one anyway, we might as well bandage here..
 149          */
 150
 151         lock_kernel();
 152
 153         DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
 154         switch (dev & 0x0f) {
 155         case SND_DEV_DSP:
 156         case SND_DEV_DSP16:
 157         case SND_DEV_AUDIO:
 158                 ret = audio_read(dev, file, buf, count);
 159                 break;
 160
 161         case SND_DEV_SEQ:
 162         case SND_DEV_SEQ2:
 163                 ret = sequencer_read(dev, file, buf, count);
 164                 break;
 165
 166         case SND_DEV_MIDIN:
 167                 ret = MIDIbuf_read(dev, file, buf, count);
 168         }
 169         unlock_kernel();
 170         return ret;
 171 }
 172
 173 static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 174 {
 175         int dev = iminor(file->f_dentry->d_inode);
 176         int ret = -EINVAL;
 177
 178         lock_kernel();
 179         DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
 180         switch (dev & 0x0f) {
 181         case SND_DEV_SEQ:
 182         case SND_DEV_SEQ2:
 183                 ret =  sequencer_write(dev, file, buf, count);
 184                 break;
 185
 186         case SND_DEV_DSP:
 187         case SND_DEV_DSP16:
 188         case SND_DEV_AUDIO:
 189                 ret = audio_write(dev, file, buf, count);
 190                 break;
 191
 192         case SND_DEV_MIDIN:
 193                 ret =  MIDIbuf_write(dev, file, buf, count);
 194                 break;
 195         }
 196         unlock_kernel();
 197         return ret;
 198 }
 199
 200 static int sound_open(struct inode *inode, struct file *file)
 201 {
 202         int dev = iminor(inode);
 203         int retval;
 204
 205         DEB(printk("sound_open(dev=%d)\n", dev));
 206         if ((dev >= SND_NDEVS) || (dev < 0)) {
 207                 printk(KERN_ERR "Invalid minor device %d\n", dev);
 208                 return -ENXIO;
 209         }
 210         switch (dev & 0x0f) {
 211         case SND_DEV_CTL:
 212                 dev >>= 4;
 213                 if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
 214                         request_module("mixer%d", dev);
 215                 }
 216                 if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
 217                         return -ENXIO;
 218
 219                 if (!try_module_get(mixer_devs[dev]->owner))
 220                         return -ENXIO;
 221                 break;
 222
 223         case SND_DEV_SEQ:
 224         case SND_DEV_SEQ2:
 225                 if ((retval = sequencer_open(dev, file)) < 0)
 226                         return retval;
 227                 break;
 228
 229         case SND_DEV_MIDIN:
 230                 if ((retval = MIDIbuf_open(dev, file)) < 0)
 231                         return retval;
 232                 break;
 233
 234         case SND_DEV_DSP:
 235         case SND_DEV_DSP16:
 236         case SND_DEV_AUDIO:
 237                 if ((retval = audio_open(dev, file)) < 0)
 238                         return retval;
 239                 break;
 240
 241         default:
 242                 printk(KERN_ERR "Invalid minor device %d\n", dev);
 243                 return -ENXIO;
 244         }
 245
 246         return 0;
 247 }
 248
 249 static int sound_release(struct inode *inode, struct file *file)
 250 {
 251         int dev = iminor(inode);
 252
 253         lock_kernel();
 254         DEB(printk("sound_release(dev=%d)\n", dev));
 255         switch (dev & 0x0f) {
 256         case SND_DEV_CTL:
 257                 module_put(mixer_devs[dev >> 4]->owner);
 258                 break;
 259
 260         case SND_DEV_SEQ:
 261         case SND_DEV_SEQ2:
 262                 sequencer_release(dev, file);
 263                 break;
 264
 265         case SND_DEV_MIDIN:
 266                 MIDIbuf_release(dev, file);
 267                 break;
 268
 269         case SND_DEV_DSP:
 270         case SND_DEV_DSP16:
 271         case SND_DEV_AUDIO:
 272                 audio_release(dev, file);
 273                 break;
 274
 275         default:
 276                 printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
 277         }
 278         unlock_kernel();
 279
 280         return 0;
 281 }
 282
 283 static int get_mixer_info(int dev, void __user *arg)
 284 {
 285         mixer_info info;
 286         memset(&info, 0, sizeof(info));
 287         strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
 288         strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
 289         info.modify_counter = mixer_devs[dev]->modify_counter;
 290         if (__copy_to_user(arg, &info,  sizeof(info)))
 291                 return -EFAULT;
 292         return 0;
 293 }
 294
 295 static int get_old_mixer_info(int dev, void __user *arg)
 296 {
 297         _old_mixer_info info;
 298         memset(&info, 0, sizeof(info));
 299         strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
 300         strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
 301         if (copy_to_user(arg, &info,  sizeof(info)))
 302                 return -EFAULT;
 303         return 0;
 304 }
 305
 306 static int sound_mixer_ioctl(int mixdev, unsigned int cmd, void __user *arg)
 307 {
 308         if (mixdev < 0 || mixdev >= MAX_MIXER_DEV)
 309                 return -ENXIO;
 310         /* Try to load the mixer... */
 311         if (mixer_devs[mixdev] == NULL) {
 312                 request_module("mixer%d", mixdev);
 313         }
 314         if (mixdev >= num_mixers || !mixer_devs[mixdev])
 315                 return -ENXIO;
 316         if (cmd == SOUND_MIXER_INFO)
 317                 return get_mixer_info(mixdev, arg);
 318         if (cmd == SOUND_OLD_MIXER_INFO)
 319                 return get_old_mixer_info(mixdev, arg);
 320         if (_SIOC_DIR(cmd) & _SIOC_WRITE)
 321                 mixer_devs[mixdev]->modify_counter++;
 322         if (!mixer_devs[mixdev]->ioctl)
 323                 return -EINVAL;
 324         return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg);
 325 }
 326
 327 static int sound_ioctl(struct inode *inode, struct file *file,
 328                        unsigned int cmd, unsigned long arg)
 329 {
 330         int len = 0, dtype;
 331         int dev = iminor(inode);
 332         void __user *p = (void __user *)arg;
 333
 334         if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
 335                 /*
 336                  * Have to validate the address given by the process.
 337                  */
 338                 len = _SIOC_SIZE(cmd);
 339                 if (len < 1 || len > 65536 || !p)
 340                         return -EFAULT;
 341                 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
 342                         if (!access_ok(VERIFY_READ, p, len))
 343                                 return -EFAULT;
 344                 if (_SIOC_DIR(cmd) & _SIOC_READ)
 345                         if (!access_ok(VERIFY_WRITE, p, len))
 346                                 return -EFAULT;
 347         }
 348         DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
 349         if (cmd == OSS_GETVERSION)
 350                 return __put_user(SOUND_VERSION, (int __user *)p);
 351
 352         if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 &&   /* Mixer ioctl */
 353             (dev & 0x0f) != SND_DEV_CTL) {
 354                 dtype = dev & 0x0f;
 355                 switch (dtype) {
 356                 case SND_DEV_DSP:
 357                 case SND_DEV_DSP16:
 358                 case SND_DEV_AUDIO:
 359                         return sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
 360                                                  cmd, p);
 361
 362                 default:
 363                         return sound_mixer_ioctl(dev >> 4, cmd, p);
 364                 }
 365         }
 366         switch (dev & 0x0f) {
 367         case SND_DEV_CTL:
 368                 if (cmd == SOUND_MIXER_GETLEVELS)
 369                         return get_mixer_levels(p);
 370                 if (cmd == SOUND_MIXER_SETLEVELS)
 371                         return set_mixer_levels(p);
 372                 return sound_mixer_ioctl(dev >> 4, cmd, p);
 373
 374         case SND_DEV_SEQ:
 375         case SND_DEV_SEQ2:
 376                 return sequencer_ioctl(dev, file, cmd, p);
 377
 378         case SND_DEV_DSP:
 379         case SND_DEV_DSP16:
 380         case SND_DEV_AUDIO:
 381                 return audio_ioctl(dev, file, cmd, p);
 382                 break;
 383
 384         case SND_DEV_MIDIN:
 385                 return MIDIbuf_ioctl(dev, file, cmd, p);
 386                 break;
 387
 388         }
 389         return -EINVAL;
 390 }
 391
 392 static unsigned int sound_poll(struct file *file, poll_table * wait)
 393 {
 394         struct inode *inode = file->f_dentry->d_inode;
 395         int dev = iminor(inode);
 396
 397         DEB(printk("sound_poll(dev=%d)\n", dev));
 398         switch (dev & 0x0f) {
 399         case SND_DEV_SEQ:
 400         case SND_DEV_SEQ2:
 401                 return sequencer_poll(dev, file, wait);
 402
 403         case SND_DEV_MIDIN:
 404                 return MIDIbuf_poll(dev, file, wait);
 405
 406         case SND_DEV_DSP:
 407         case SND_DEV_DSP16:
 408         case SND_DEV_AUDIO:
 409                 return DMAbuf_poll(file, dev >> 4, wait);
 410         }
 411         return 0;
 412 }
 413
 414 static int sound_mmap(struct file *file, struct vm_area_struct *vma)
 415 {
 416         int dev_class;
 417         unsigned long size;
 418         struct dma_buffparms *dmap = NULL;
 419         int dev = iminor(file->f_dentry->d_inode);
 420
 421         dev_class = dev & 0x0f;
 422         dev >>= 4;
 423
 424         if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
 425                 printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
 426                 return -EINVAL;
 427         }
 428         lock_kernel();
 429         if (vma->vm_flags & VM_WRITE)   /* Map write and read/write to the output buf */
 430                 dmap = audio_devs[dev]->dmap_out;
 431         else if (vma->vm_flags & VM_READ)
 432                 dmap = audio_devs[dev]->dmap_in;
 433         else {
 434                 printk(KERN_ERR "Sound: Undefined mmap() access\n");
 435                 unlock_kernel();
 436                 return -EINVAL;
 437         }
 438
 439         if (dmap == NULL) {
 440                 printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
 441                 unlock_kernel();
 442                 return -EIO;
 443         }
 444         if (dmap->raw_buf == NULL) {
 445                 printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
 446                 unlock_kernel();
 447                 return -EIO;
 448         }
 449         if (dmap->mapping_flags) {
 450                 printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
 451                 unlock_kernel();
 452                 return -EIO;
 453         }
 454         if (vma->vm_pgoff != 0) {
 455                 printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
 456                 unlock_kernel();
 457                 return -EINVAL;
 458         }
 459         size = vma->vm_end - vma->vm_start;
 460
 461         if (size != dmap->bytes_in_use) {
 462                 printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
 463         }
 464         if (remap_pfn_range(vma, vma->vm_start,
 465                         virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
 466                         vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
 467                 unlock_kernel();
 468                 return -EAGAIN;
 469         }
 470
 471         dmap->mapping_flags |= DMA_MAP_MAPPED;
 472
 473         if( audio_devs[dev]->d->mmap)
 474                 audio_devs[dev]->d->mmap(dev);
 475
 476         memset(dmap->raw_buf,
 477                dmap->neutral_byte,
 478                dmap->bytes_in_use);
 479         unlock_kernel();
 480         return 0;
 481 }
 482
 483 struct file_operations oss_sound_fops = {
 484         .owner          = THIS_MODULE,
 485         .llseek         = no_llseek,
 486         .read           = sound_read,
 487         .write          = sound_write,
 488         .poll           = sound_poll,
 489         .ioctl          = sound_ioctl,
 490         .mmap           = sound_mmap,
 491         .open           = sound_open,
 492         .release        = sound_release,
 493 };
 494
 495 /*
 496  *      Create the required special subdevices
 497  */
 498
 499 static int create_special_devices(void)
 500 {
 501         int seq1,seq2;
 502         seq1=register_sound_special(&oss_sound_fops, 1);
 503         if(seq1==-1)
 504                 goto bad;
 505         seq2=register_sound_special(&oss_sound_fops, 8);
 506         if(seq2!=-1)
 507                 return 0;
 508         unregister_sound_special(1);
 509 bad:
 510         return -1;
 511 }
 512
 513
 514 /* These device names follow the official Linux device list,
 515  * Documentation/devices.txt.  Let us know if there are other
 516  * common names we should support for compatibility.
 517  * Only those devices not created by the generic code in sound_core.c are
 518  * registered here.
 519  */
 520 static const struct {
 521         unsigned short minor;
 522         char *name;
 523         umode_t mode;
 524         int *num;
 525 } dev_list[] = { /* list of minor devices */
 526 /* seems to be some confusion here -- this device is not in the device list */
 527         {SND_DEV_DSP16,     "dspW",      S_IWUGO | S_IRUSR | S_IRGRP,
 528          &num_audiodevs},
 529         {SND_DEV_AUDIO,     "audio",     S_IWUGO | S_IRUSR | S_IRGRP,
 530          &num_audiodevs},
 531 };
 532
 533 static int dmabuf;
 534 static int dmabug;
 535
 536 module_param(dmabuf, int, 0444);
 537 module_param(dmabug, int, 0444);
 538
 539 static int __init oss_init(void)
 540 {
 541         int             err;
 542         int i, j;
 543
 544         /* drag in sound_syms.o */
 545         {
 546                 extern char sound_syms_symbol;
 547                 sound_syms_symbol = 0;
 548         }
 549
 550 #ifdef CONFIG_PCI
 551         if(dmabug)
 552                 isa_dma_bridge_buggy = dmabug;
 553 #endif
 554
 555         err = create_special_devices();
 556         if (err) {
 557                 printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
 558                 return err;
 559         }
 560
 561         /* Protecting the innocent */
 562         sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
 563
 564         for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
 565                 class_device_create(sound_class, NULL,
 566                                     MKDEV(SOUND_MAJOR, dev_list[i].minor),
 567                                     NULL, "%s", dev_list[i].name);
 568
 569                 if (!dev_list[i].num)
 570                         continue;
 571
 572                 for (j = 1; j < *dev_list[i].num; j++)
 573                         class_device_create(sound_class, NULL,
 574                                             MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)),
 575                                             NULL, "%s%d", dev_list[i].name, j);
 576         }
 577
 578         if (sound_nblocks >= 1024)
 579                 printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
 580
 581         return 0;
 582 }
 583
 584 static void __exit oss_cleanup(void)
 585 {
 586         int i, j;
 587
 588         for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
 589                 class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
 590                 if (!dev_list[i].num)
 591                         continue;
 592                 for (j = 1; j < *dev_list[i].num; j++)
 593                         class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
 594         }
 595
 596         unregister_sound_special(1);
 597         unregister_sound_special(8);
 598
 599         sound_stop_timer();
 600
 601         sequencer_unload();
 602
 603         for (i = 0; i < MAX_DMA_CHANNELS; i++)
 604                 if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
 605                         printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
 606                         sound_free_dma(i);
 607                 }
 608
 609         for (i = 0; i < sound_nblocks; i++)
 610                 vfree(sound_mem_blocks[i]);
 611
 612 }
 613
 614 module_init(oss_init);
 615 module_exit(oss_cleanup);
 616 MODULE_LICENSE("GPL");
 617
 618
 619 int sound_alloc_dma(int chn, char *deviceID)
 620 {
 621         int err;
 622
 623         if ((err = request_dma(chn, deviceID)) != 0)
 624                 return err;
 625
 626         dma_alloc_map[chn] = DMA_MAP_FREE;
 627
 628         return 0;
 629 }
 630
 631 int sound_open_dma(int chn, char *deviceID)
 632 {
 633         if (!valid_dma(chn)) {
 634                 printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
 635                 return 1;
 636         }
 637
 638         if (dma_alloc_map[chn] != DMA_MAP_FREE) {
 639                 printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
 640                 return 1;
 641         }
 642         dma_alloc_map[chn] = DMA_MAP_BUSY;
 643         return 0;
 644 }
 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
 656 void sound_close_dma(int chn)
 657 {
 658         if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
 659                 printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
 660                 return;
 661         }
 662         dma_alloc_map[chn] = DMA_MAP_FREE;
 663 }
 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
 718 void conf_printf2(char *name, int base, int irq, int dma, int dma2)
 719 {
 720 #ifndef CONFIG_SOUND_TRACEINIT
 721         return;
 722 #else
 723         printk("<%s> at 0x%03x", name, base);
 724
 725         if (irq)
 726                 printk(" irq %d", (irq > 0) ? irq : -irq);
 727
 728         if (dma != -1 || dma2 != -1)
 729         {
 730                   printk(" dma %d", dma);
 731                   if (dma2 != -1)
 732                           printk(",%d", dma2);
 733         }
 734         printk("\n");
 735 #endif
 736 }