linux/sound/oss/soundcard.c
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   1/*
   2 * linux/sound/oss/soundcard.c
   3 *
   4 * Sound card driver for Linux
   5 *
   6 *
   7 * Copyright (C) by Hannu Savolainen 1993-1997
   8 *
   9 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
  10 * Version 2 (June 1991). See the "COPYING" file distributed with this software
  11 * for more info.
  12 *
  13 *
  14 * Thomas Sailer     : ioctl code reworked (vmalloc/vfree removed)
  15 *                   integrated sound_switch.c
  16 * Stefan Reinauer   : integrated /proc/sound (equals to /dev/sndstat,
  17 *                   which should disappear in the near future)
  18 * Eric Dumas        : devfs support (22-Jan-98) <dumas@linux.eu.org> with
  19 *                   fixups by C. Scott Ananian <cananian@alumni.princeton.edu>
  20 * Richard Gooch     : moved common (non OSS-specific) devices to sound_core.c
  21 * Rob Riggs         : Added persistent DMA buffers support (1998/10/17)
  22 * Christoph Hellwig : Some cleanup work (2000/03/01)
  23 */
  24
  25
  26#include "sound_config.h"
  27#include <linux/init.h>
  28#include <linux/types.h>
  29#include <linux/errno.h>
  30#include <linux/signal.h>
  31#include <linux/fcntl.h>
  32#include <linux/ctype.h>
  33#include <linux/stddef.h>
  34#include <linux/kmod.h>
  35#include <linux/kernel.h>
  36#include <asm/dma.h>
  37#include <asm/io.h>
  38#include <linux/wait.h>
  39#include <linux/ioport.h>
  40#include <linux/major.h>
  41#include <linux/delay.h>
  42#include <linux/proc_fs.h>
  43#include <linux/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 */
  58void *          sound_mem_blocks[MAX_MEM_BLOCKS];
  59int             sound_nblocks = 0;
  60
  61/* Persistent DMA buffers */
  62#ifdef CONFIG_SOUND_DMAP
  63int             sound_dmap_flag = 1;
  64#else
  65int             sound_dmap_flag = 0;
  66#endif
  67
  68static 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
  75unsigned long seq_time = 0;     /* Time for /dev/sequencer */
  76extern struct class *sound_class;
  77
  78/*
  79 * Table for configurable mixer volume handling
  80 */
  81static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
  82static int num_mixer_volumes;
  83
  84int *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}
 112EXPORT_SYMBOL(load_mixer_volumes);
 113
 114static 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
 127static 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
 143static 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
 176static 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
 203static 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
 252static 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
 286static 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
 298static 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
 309static 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
 330static 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
 404static 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
 426static 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
 495const 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 
 511static 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);
 521bad:
 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 */
 532static 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
 545static int dmabuf;
 546static int dmabug;
 547
 548module_param(dmabuf, int, 0444);
 549module_param(dmabug, int, 0444);
 550
 551static 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
 591static 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
 621module_init(oss_init);
 622module_exit(oss_cleanup);
 623MODULE_LICENSE("GPL");
 624MODULE_DESCRIPTION("OSS Sound subsystem");
 625MODULE_AUTHOR("Hannu Savolainen, et al.");
 626
 627
 628int 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}
 639EXPORT_SYMBOL(sound_alloc_dma);
 640
 641int 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}
 655EXPORT_SYMBOL(sound_open_dma);
 656
 657void 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}
 666EXPORT_SYMBOL(sound_free_dma);
 667
 668void 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}
 676EXPORT_SYMBOL(sound_close_dma);
 677
 678static void do_sequencer_timer(unsigned long dummy)
 679{
 680        sequencer_timer(0);
 681}
 682
 683
 684static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);
 685
 686void 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
 706void sound_stop_timer(void)
 707{
 708        del_timer(&seq_timer);
 709}
 710
 711void 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}
 730EXPORT_SYMBOL(conf_printf);
 731
 732void 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}
 751EXPORT_SYMBOL(conf_printf2);
 752
 753
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