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 <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