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/smp_lock.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 int             sound_nblocks = 0;
  60
  61 /* Persistent DMA buffers */
  62 #ifdef CONFIG_SOUND_DMAP
  63 int             sound_dmap_flag = 1;
  64 #else
  65 int             sound_dmap_flag = 0;
  66 #endif
  67
  68 static char     dma_alloc_map[MAX_DMA_CHANNELS];
  69
  70 #define DMA_MAP_UNAVAIL         0
  71 #define DMA_MAP_FREE            1
  72 #define DMA_MAP_BUSY            2
  73
  74
  75 unsigned long seq_time = 0;     /* Time for /dev/sequencer */
  76 extern struct class *sound_class;
  77
  78 /*
  79  * Table for configurable mixer volume handling
  80  */
  81 static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
  82 static int num_mixer_volumes;
  83
  84 int *load_mixer_volumes(char *name, int *levels, int present)
  85 {
  86         int             i, n;
  87
  88         for (i = 0; i < num_mixer_volumes; i++) {
  89                 if (strcmp(name, mixer_vols[i].name) == 0) {
  90                         if (present)
  91                                 mixer_vols[i].num = i;
  92                         return mixer_vols[i].levels;
  93                 }
  94         }
  95         if (num_mixer_volumes >= MAX_MIXER_DEV) {
  96                 printk(KERN_ERR "Sound: Too many mixers (%s)\n", name);
  97                 return levels;
  98         }
  99         n = num_mixer_volumes++;
 100
 101         strcpy(mixer_vols[n].name, name);
 102
 103         if (present)
 104                 mixer_vols[n].num = n;
 105         else
 106                 mixer_vols[n].num = -1;
 107
 108         for (i = 0; i < 32; i++)
 109                 mixer_vols[n].levels[i] = levels[i];
 110         return mixer_vols[n].levels;
 111 }
 112 EXPORT_SYMBOL(load_mixer_volumes);
 113
 114 static int set_mixer_levels(void __user * arg)
 115 {
 116         /* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */
 117         mixer_vol_table buf;
 118
 119         if (__copy_from_user(&buf, arg, sizeof(buf)))
 120                 return -EFAULT;
 121         load_mixer_volumes(buf.name, buf.levels, 0);
 122         if (__copy_to_user(arg, &buf, sizeof(buf)))
 123                 return -EFAULT;
 124         return 0;
 125 }
 126
 127 static int get_mixer_levels(void __user * arg)
 128 {
 129         int n;
 130
 131         if (__get_user(n, (int __user *)(&(((mixer_vol_table __user *)arg)->num))))
 132                 return -EFAULT;
 133         if (n < 0 || n >= num_mixer_volumes)
 134                 return -EINVAL;
 135         if (__copy_to_user(arg, &mixer_vols[n], sizeof(mixer_vol_table)))
 136                 return -EFAULT;
 137         return 0;
 138 }
 139
 140 /* 4K page size but our output routines use some slack for overruns */
 141 #define PROC_BLOCK_SIZE (3*1024)
 142
 143 static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 144 {
 145         int dev = iminor(file->f_path.dentry->d_inode);
 146         int ret = -EINVAL;
 147
 148         /*
 149          *      The OSS drivers aren't remotely happy without this locking,
 150          *      and unless someone fixes them when they are about to bite the
 151          *      big one anyway, we might as well bandage here..
 152          */
 153
 154         lock_kernel();
 155
 156         DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
 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         unlock_kernel();
 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->f_path.dentry->d_inode);
 179         int ret = -EINVAL;
 180
 181         lock_kernel();
 182         DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
 183         switch (dev & 0x0f) {
 184         case SND_DEV_SEQ:
 185         case SND_DEV_SEQ2:
 186                 ret =  sequencer_write(dev, file, buf, count);
 187                 break;
 188
 189         case SND_DEV_DSP:
 190         case SND_DEV_DSP16:
 191         case SND_DEV_AUDIO:
 192                 ret = audio_write(dev, file, buf, count);
 193                 break;
 194
 195         case SND_DEV_MIDIN:
 196                 ret =  MIDIbuf_write(dev, file, buf, count);
 197                 break;
 198         }
 199         unlock_kernel();
 200         return ret;
 201 }
 202
 203 static int sound_open(struct inode *inode, struct file *file)
 204 {
 205         int dev = iminor(inode);
 206         int retval;
 207
 208         DEB(printk("sound_open(dev=%d)\n", dev));
 209         if ((dev >= SND_NDEVS) || (dev < 0)) {
 210                 printk(KERN_ERR "Invalid minor device %d\n", dev);
 211                 return -ENXIO;
 212         }
 213         switch (dev & 0x0f) {
 214         case SND_DEV_CTL:
 215                 dev >>= 4;
 216                 if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
 217                         request_module("mixer%d", dev);
 218                 }
 219                 if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
 220                         return -ENXIO;
 221
 222                 if (!try_module_get(mixer_devs[dev]->owner))
 223                         return -ENXIO;
 224                 break;
 225
 226         case SND_DEV_SEQ:
 227         case SND_DEV_SEQ2:
 228                 if ((retval = sequencer_open(dev, file)) < 0)
 229                         return retval;
 230                 break;
 231
 232         case SND_DEV_MIDIN:
 233                 if ((retval = MIDIbuf_open(dev, file)) < 0)
 234                         return retval;
 235                 break;
 236
 237         case SND_DEV_DSP:
 238         case SND_DEV_DSP16:
 239         case SND_DEV_AUDIO:
 240                 if ((retval = audio_open(dev, file)) < 0)
 241                         return retval;
 242                 break;
 243
 244         default:
 245                 printk(KERN_ERR "Invalid minor device %d\n", dev);
 246                 return -ENXIO;
 247         }
 248
 249         return 0;
 250 }
 251
 252 static int sound_release(struct inode *inode, struct file *file)
 253 {
 254         int dev = iminor(inode);
 255
 256         lock_kernel();
 257         DEB(printk("sound_release(dev=%d)\n", dev));
 258         switch (dev & 0x0f) {
 259         case SND_DEV_CTL:
 260                 module_put(mixer_devs[dev >> 4]->owner);
 261                 break;
 262
 263         case SND_DEV_SEQ:
 264         case SND_DEV_SEQ2:
 265                 sequencer_release(dev, file);
 266                 break;
 267
 268         case SND_DEV_MIDIN:
 269                 MIDIbuf_release(dev, file);
 270                 break;
 271
 272         case SND_DEV_DSP:
 273         case SND_DEV_DSP16:
 274         case SND_DEV_AUDIO:
 275                 audio_release(dev, file);
 276                 break;
 277
 278         default:
 279                 printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
 280         }
 281         unlock_kernel();
 282
 283         return 0;
 284 }
 285
 286 static int get_mixer_info(int dev, void __user *arg)
 287 {
 288         mixer_info info;
 289         memset(&info, 0, sizeof(info));
 290         strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
 291         strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
 292         info.modify_counter = mixer_devs[dev]->modify_counter;
 293         if (__copy_to_user(arg, &info,  sizeof(info)))
 294                 return -EFAULT;
 295         return 0;
 296 }
 297
 298 static int get_old_mixer_info(int dev, void __user *arg)
 299 {
 300         _old_mixer_info info;
 301         memset(&info, 0, sizeof(info));
 302         strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
 303         strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
 304         if (copy_to_user(arg, &info,  sizeof(info)))
 305                 return -EFAULT;
 306         return 0;
 307 }
 308
 309 static int sound_mixer_ioctl(int mixdev, unsigned int cmd, void __user *arg)
 310 {
 311         if (mixdev < 0 || mixdev >= MAX_MIXER_DEV)
 312                 return -ENXIO;
 313         /* Try to load the mixer... */
 314         if (mixer_devs[mixdev] == NULL) {
 315                 request_module("mixer%d", mixdev);
 316         }
 317         if (mixdev >= num_mixers || !mixer_devs[mixdev])
 318                 return -ENXIO;
 319         if (cmd == SOUND_MIXER_INFO)
 320                 return get_mixer_info(mixdev, arg);
 321         if (cmd == SOUND_OLD_MIXER_INFO)
 322                 return get_old_mixer_info(mixdev, arg);
 323         if (_SIOC_DIR(cmd) & _SIOC_WRITE)
 324                 mixer_devs[mixdev]->modify_counter++;
 325         if (!mixer_devs[mixdev]->ioctl)
 326                 return -EINVAL;
 327         return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg);
 328 }
 329
 330 static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 331 {
 332         int len = 0, dtype;
 333         int dev = iminor(file->f_dentry->d_inode);
 334         long ret = -EINVAL;
 335         void __user *p = (void __user *)arg;
 336
 337         if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
 338                 /*
 339                  * Have to validate the address given by the process.
 340                  */
 341                 len = _SIOC_SIZE(cmd);
 342                 if (len < 1 || len > 65536 || !p)
 343                         return -EFAULT;
 344                 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
 345                         if (!access_ok(VERIFY_READ, p, len))
 346                                 return -EFAULT;
 347                 if (_SIOC_DIR(cmd) & _SIOC_READ)
 348                         if (!access_ok(VERIFY_WRITE, p, len))
 349                                 return -EFAULT;
 350         }
 351         DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
 352         if (cmd == OSS_GETVERSION)
 353                 return __put_user(SOUND_VERSION, (int __user *)p);
 354
 355         lock_kernel();
 356         if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 &&   /* Mixer ioctl */
 357             (dev & 0x0f) != SND_DEV_CTL) {
 358                 dtype = dev & 0x0f;
 359                 switch (dtype) {
 360                 case SND_DEV_DSP:
 361                 case SND_DEV_DSP16:
 362                 case SND_DEV_AUDIO:
 363                         ret = sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
 364                                                  cmd, p);
 365                         break;
 366                 default:
 367                         ret = sound_mixer_ioctl(dev >> 4, cmd, p);
 368                         break;
 369                 }
 370                 unlock_kernel();
 371                 return ret;
 372         }
 373
 374         switch (dev & 0x0f) {
 375         case SND_DEV_CTL:
 376                 if (cmd == SOUND_MIXER_GETLEVELS)
 377                         ret = get_mixer_levels(p);
 378                 else if (cmd == SOUND_MIXER_SETLEVELS)
 379                         ret = set_mixer_levels(p);
 380                 else
 381                         ret = sound_mixer_ioctl(dev >> 4, cmd, p);
 382                 break;
 383
 384         case SND_DEV_SEQ:
 385         case SND_DEV_SEQ2:
 386                 ret = sequencer_ioctl(dev, file, cmd, p);
 387                 break;
 388
 389         case SND_DEV_DSP:
 390         case SND_DEV_DSP16:
 391         case SND_DEV_AUDIO:
 392                 return audio_ioctl(dev, file, cmd, p);
 393                 break;
 394
 395         case SND_DEV_MIDIN:
 396                 return MIDIbuf_ioctl(dev, file, cmd, p);
 397                 break;
 398
 399         }
 400         unlock_kernel();
 401         return ret;
 402 }
 403
 404 static unsigned int sound_poll(struct file *file, poll_table * wait)
 405 {
 406         struct inode *inode = file->f_path.dentry->d_inode;
 407         int dev = iminor(inode);
 408
 409         DEB(printk("sound_poll(dev=%d)\n", dev));
 410         switch (dev & 0x0f) {
 411         case SND_DEV_SEQ:
 412         case SND_DEV_SEQ2:
 413                 return sequencer_poll(dev, file, wait);
 414
 415         case SND_DEV_MIDIN:
 416                 return MIDIbuf_poll(dev, file, wait);
 417
 418         case SND_DEV_DSP:
 419         case SND_DEV_DSP16:
 420         case SND_DEV_AUDIO:
 421                 return DMAbuf_poll(file, dev >> 4, wait);
 422         }
 423         return 0;
 424 }
 425
 426 static int sound_mmap(struct file *file, struct vm_area_struct *vma)
 427 {
 428         int dev_class;
 429         unsigned long size;
 430         struct dma_buffparms *dmap = NULL;
 431         int dev = iminor(file->f_path.dentry->d_inode);
 432
 433         dev_class = dev & 0x0f;
 434         dev >>= 4;
 435
 436         if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
 437                 printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
 438                 return -EINVAL;
 439         }
 440         lock_kernel();
 441         if (vma->vm_flags & VM_WRITE)   /* Map write and read/write to the output buf */
 442                 dmap = audio_devs[dev]->dmap_out;
 443         else if (vma->vm_flags & VM_READ)
 444                 dmap = audio_devs[dev]->dmap_in;
 445         else {
 446                 printk(KERN_ERR "Sound: Undefined mmap() access\n");
 447                 unlock_kernel();
 448                 return -EINVAL;
 449         }
 450
 451         if (dmap == NULL) {
 452                 printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
 453                 unlock_kernel();
 454                 return -EIO;
 455         }
 456         if (dmap->raw_buf == NULL) {
 457                 printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
 458                 unlock_kernel();
 459                 return -EIO;
 460         }
 461         if (dmap->mapping_flags) {
 462                 printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
 463                 unlock_kernel();
 464                 return -EIO;
 465         }
 466         if (vma->vm_pgoff != 0) {
 467                 printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
 468                 unlock_kernel();
 469                 return -EINVAL;
 470         }
 471         size = vma->vm_end - vma->vm_start;
 472
 473         if (size != dmap->bytes_in_use) {
 474                 printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
 475         }
 476         if (remap_pfn_range(vma, vma->vm_start,
 477                         virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
 478                         vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
 479                 unlock_kernel();
 480                 return -EAGAIN;
 481         }
 482
 483         dmap->mapping_flags |= DMA_MAP_MAPPED;
 484
 485         if( audio_devs[dev]->d->mmap)
 486                 audio_devs[dev]->d->mmap(dev);
 487
 488         memset(dmap->raw_buf,
 489                dmap->neutral_byte,
 490                dmap->bytes_in_use);
 491         unlock_kernel();
 492         return 0;
 493 }
 494
 495 const struct file_operations oss_sound_fops = {
 496         .owner          = THIS_MODULE,
 497         .llseek         = no_llseek,
 498         .read           = sound_read,
 499         .write          = sound_write,
 500         .poll           = sound_poll,
 501         .unlocked_ioctl = sound_ioctl,
 502         .mmap           = sound_mmap,
 503         .open           = sound_open,
 504         .release        = sound_release,
 505 };
 506
 507 /*
 508  *      Create the required special subdevices
 509  */
 510
 511 static int create_special_devices(void)
 512 {
 513         int seq1,seq2;
 514         seq1=register_sound_special(&oss_sound_fops, 1);
 515         if(seq1==-1)
 516                 goto bad;
 517         seq2=register_sound_special(&oss_sound_fops, 8);
 518         if(seq2!=-1)
 519                 return 0;
 520         unregister_sound_special(1);
 521 bad:
 522         return -1;
 523 }
 524
 525
 526 /* These device names follow the official Linux device list,
 527  * Documentation/devices.txt.  Let us know if there are other
 528  * common names we should support for compatibility.
 529  * Only those devices not created by the generic code in sound_core.c are
 530  * registered here.
 531  */
 532 static const struct {
 533         unsigned short minor;
 534         char *name;
 535         umode_t mode;
 536         int *num;
 537 } dev_list[] = { /* list of minor devices */
 538 /* seems to be some confusion here -- this device is not in the device list */
 539         {SND_DEV_DSP16,     "dspW",      S_IWUGO | S_IRUSR | S_IRGRP,
 540          &num_audiodevs},
 541         {SND_DEV_AUDIO,     "audio",     S_IWUGO | S_IRUSR | S_IRGRP,
 542          &num_audiodevs},
 543 };
 544
 545 static int dmabuf;
 546 static int dmabug;
 547
 548 module_param(dmabuf, int, 0444);
 549 module_param(dmabug, int, 0444);
 550
 551 static int __init oss_init(void)
 552 {
 553         int             err;
 554         int i, j;
 555
 556 #ifdef CONFIG_PCI
 557         if(dmabug)
 558                 isa_dma_bridge_buggy = dmabug;
 559 #endif
 560
 561         err = create_special_devices();
 562         if (err) {
 563                 printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
 564                 return err;
 565         }
 566
 567         /* Protecting the innocent */
 568         sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
 569
 570         for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
 571                 device_create(sound_class, NULL,
 572                               MKDEV(SOUND_MAJOR, dev_list[i].minor), NULL,
 573                               "%s", dev_list[i].name);
 574
 575                 if (!dev_list[i].num)
 576                         continue;
 577
 578                 for (j = 1; j < *dev_list[i].num; j++)
 579                         device_create(sound_class, NULL,
 580                                       MKDEV(SOUND_MAJOR,
 581                                             dev_list[i].minor + (j*0x10)),
 582                                       NULL, "%s%d", dev_list[i].name, j);
 583         }
 584
 585         if (sound_nblocks >= MAX_MEM_BLOCKS - 1)
 586                 printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
 587
 588         return 0;
 589 }
 590
 591 static void __exit oss_cleanup(void)
 592 {
 593         int i, j;
 594
 595         for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
 596                 device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
 597                 if (!dev_list[i].num)
 598                         continue;
 599                 for (j = 1; j < *dev_list[i].num; j++)
 600                         device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
 601         }
 602
 603         unregister_sound_special(1);
 604         unregister_sound_special(8);
 605
 606         sound_stop_timer();
 607
 608         sequencer_unload();
 609
 610         for (i = 0; i < MAX_DMA_CHANNELS; i++)
 611                 if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
 612                         printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
 613                         sound_free_dma(i);
 614                 }
 615
 616         for (i = 0; i < sound_nblocks; i++)
 617                 vfree(sound_mem_blocks[i]);
 618
 619 }
 620
 621 module_init(oss_init);
 622 module_exit(oss_cleanup);
 623 MODULE_LICENSE("GPL");
 624 MODULE_DESCRIPTION("OSS Sound subsystem");
 625 MODULE_AUTHOR("Hannu Savolainen, et al.");
 626
 627
 628 int sound_alloc_dma(int chn, char *deviceID)
 629 {
 630         int err;
 631
 632         if ((err = request_dma(chn, deviceID)) != 0)
 633                 return err;
 634
 635         dma_alloc_map[chn] = DMA_MAP_FREE;
 636
 637         return 0;
 638 }
 639 EXPORT_SYMBOL(sound_alloc_dma);
 640
 641 int sound_open_dma(int chn, char *deviceID)
 642 {
 643         if (!valid_dma(chn)) {
 644                 printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
 645                 return 1;
 646         }
 647
 648         if (dma_alloc_map[chn] != DMA_MAP_FREE) {
 649                 printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
 650                 return 1;
 651         }
 652         dma_alloc_map[chn] = DMA_MAP_BUSY;
 653         return 0;
 654 }
 655 EXPORT_SYMBOL(sound_open_dma);
 656
 657 void sound_free_dma(int chn)
 658 {
 659         if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) {
 660                 /* printk( "sound_free_dma: Bad access to DMA channel %d\n",  chn); */
 661                 return;
 662         }
 663         free_dma(chn);
 664         dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
 665 }
 666 EXPORT_SYMBOL(sound_free_dma);
 667
 668 void sound_close_dma(int chn)
 669 {
 670         if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
 671                 printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
 672                 return;
 673         }
 674         dma_alloc_map[chn] = DMA_MAP_FREE;
 675 }
 676 EXPORT_SYMBOL(sound_close_dma);
 677
 678 static void do_sequencer_timer(unsigned long dummy)
 679 {
 680         sequencer_timer(0);
 681 }
 682
 683
 684 static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);
 685
 686 void request_sound_timer(int count)
 687 {
 688         extern unsigned long seq_time;
 689
 690         if (count < 0) {
 691                 seq_timer.expires = (-count) + jiffies;
 692                 add_timer(&seq_timer);
 693                 return;
 694         }
 695         count += seq_time;
 696
 697         count -= jiffies;
 698
 699         if (count < 1)
 700                 count = 1;
 701
 702         seq_timer.expires = (count) + jiffies;
 703         add_timer(&seq_timer);
 704 }
 705
 706 void sound_stop_timer(void)
 707 {
 708         del_timer(&seq_timer);
 709 }
 710
 711 void conf_printf(char *name, struct address_info *hw_config)
 712 {
 713 #ifndef CONFIG_SOUND_TRACEINIT
 714         return;
 715 #else
 716         printk("<%s> at 0x%03x", name, hw_config->io_base);
 717
 718         if (hw_config->irq)
 719                 printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
 720
 721         if (hw_config->dma != -1 || hw_config->dma2 != -1)
 722         {
 723                 printk(" dma %d", hw_config->dma);
 724                 if (hw_config->dma2 != -1)
 725                         printk(",%d", hw_config->dma2);
 726         }
 727         printk("\n");
 728 #endif
 729 }
 730 EXPORT_SYMBOL(conf_printf);
 731
 732 void conf_printf2(char *name, int base, int irq, int dma, int dma2)
 733 {
 734 #ifndef CONFIG_SOUND_TRACEINIT
 735         return;
 736 #else
 737         printk("<%s> at 0x%03x", name, base);
 738
 739         if (irq)
 740                 printk(" irq %d", (irq > 0) ? irq : -irq);
 741
 742         if (dma != -1 || dma2 != -1)
 743         {
 744                   printk(" dma %d", dma);
 745                   if (dma2 != -1)
 746                           printk(",%d", dma2);
 747         }
 748         printk("\n");
 749 #endif
 750 }
 751 EXPORT_SYMBOL(conf_printf2);
 752