blob: a89108cb74eae7c18ae772163dca1ac93161aaa0 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Uwe Zeisbergerf30c2262006-10-03 23:01:26 +02002 * linux/sound/oss/soundcard.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#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>
Al Virof23f6e02006-10-20 15:17:02 -040045#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47/*
48 * This ought to be moved into include/asm/dma.h
49 */
50#ifndef valid_dma
51#define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4)
52#endif
53
54/*
55 * Table for permanently allocated memory (used when unloading the module)
56 */
57void * sound_mem_blocks[1024];
58int sound_nblocks = 0;
59
60/* Persistent DMA buffers */
61#ifdef CONFIG_SOUND_DMAP
62int sound_dmap_flag = 1;
63#else
64int sound_dmap_flag = 0;
65#endif
66
67static char dma_alloc_map[MAX_DMA_CHANNELS];
68
69#define DMA_MAP_UNAVAIL 0
70#define DMA_MAP_FREE 1
71#define DMA_MAP_BUSY 2
72
73
74unsigned long seq_time = 0; /* Time for /dev/sequencer */
gregkh@suse.de619e6662005-03-23 09:51:41 -080075extern struct class *sound_class;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77/*
78 * Table for configurable mixer volume handling
79 */
80static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
81static int num_mixer_volumes;
82
83int *load_mixer_volumes(char *name, int *levels, int present)
84{
85 int i, n;
86
87 for (i = 0; i < num_mixer_volumes; i++) {
88 if (strcmp(name, mixer_vols[i].name) == 0) {
89 if (present)
90 mixer_vols[i].num = i;
91 return mixer_vols[i].levels;
92 }
93 }
94 if (num_mixer_volumes >= MAX_MIXER_DEV) {
95 printk(KERN_ERR "Sound: Too many mixers (%s)\n", name);
96 return levels;
97 }
98 n = num_mixer_volumes++;
99
100 strcpy(mixer_vols[n].name, name);
101
102 if (present)
103 mixer_vols[n].num = n;
104 else
105 mixer_vols[n].num = -1;
106
107 for (i = 0; i < 32; i++)
108 mixer_vols[n].levels[i] = levels[i];
109 return mixer_vols[n].levels;
110}
Adrian Bunkece7f772006-10-04 02:17:31 -0700111EXPORT_SYMBOL(load_mixer_volumes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113static int set_mixer_levels(void __user * arg)
114{
115 /* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */
116 mixer_vol_table buf;
117
118 if (__copy_from_user(&buf, arg, sizeof(buf)))
119 return -EFAULT;
120 load_mixer_volumes(buf.name, buf.levels, 0);
121 if (__copy_to_user(arg, &buf, sizeof(buf)))
122 return -EFAULT;
123 return 0;
124}
125
126static int get_mixer_levels(void __user * arg)
127{
128 int n;
129
130 if (__get_user(n, (int __user *)(&(((mixer_vol_table __user *)arg)->num))))
131 return -EFAULT;
132 if (n < 0 || n >= num_mixer_volumes)
133 return -EINVAL;
134 if (__copy_to_user(arg, &mixer_vols[n], sizeof(mixer_vol_table)))
135 return -EFAULT;
136 return 0;
137}
138
139/* 4K page size but our output routines use some slack for overruns */
140#define PROC_BLOCK_SIZE (3*1024)
141
142static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
143{
Josef Sipek7bc56322006-12-08 02:37:40 -0800144 int dev = iminor(file->f_path.dentry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 int ret = -EINVAL;
146
147 /*
148 * The OSS drivers aren't remotely happy without this locking,
149 * and unless someone fixes them when they are about to bite the
150 * big one anyway, we might as well bandage here..
151 */
152
153 lock_kernel();
154
155 DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
156 switch (dev & 0x0f) {
157 case SND_DEV_DSP:
158 case SND_DEV_DSP16:
159 case SND_DEV_AUDIO:
160 ret = audio_read(dev, file, buf, count);
161 break;
162
163 case SND_DEV_SEQ:
164 case SND_DEV_SEQ2:
165 ret = sequencer_read(dev, file, buf, count);
166 break;
167
168 case SND_DEV_MIDIN:
169 ret = MIDIbuf_read(dev, file, buf, count);
170 }
171 unlock_kernel();
172 return ret;
173}
174
175static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
176{
Josef Sipek7bc56322006-12-08 02:37:40 -0800177 int dev = iminor(file->f_path.dentry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 int ret = -EINVAL;
179
180 lock_kernel();
181 DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
182 switch (dev & 0x0f) {
183 case SND_DEV_SEQ:
184 case SND_DEV_SEQ2:
185 ret = sequencer_write(dev, file, buf, count);
186 break;
187
188 case SND_DEV_DSP:
189 case SND_DEV_DSP16:
190 case SND_DEV_AUDIO:
191 ret = audio_write(dev, file, buf, count);
192 break;
193
194 case SND_DEV_MIDIN:
195 ret = MIDIbuf_write(dev, file, buf, count);
196 break;
197 }
198 unlock_kernel();
199 return ret;
200}
201
202static int sound_open(struct inode *inode, struct file *file)
203{
204 int dev = iminor(inode);
205 int retval;
206
207 DEB(printk("sound_open(dev=%d)\n", dev));
208 if ((dev >= SND_NDEVS) || (dev < 0)) {
209 printk(KERN_ERR "Invalid minor device %d\n", dev);
210 return -ENXIO;
211 }
212 switch (dev & 0x0f) {
213 case SND_DEV_CTL:
214 dev >>= 4;
215 if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
216 request_module("mixer%d", dev);
217 }
218 if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
219 return -ENXIO;
220
221 if (!try_module_get(mixer_devs[dev]->owner))
222 return -ENXIO;
223 break;
224
225 case SND_DEV_SEQ:
226 case SND_DEV_SEQ2:
227 if ((retval = sequencer_open(dev, file)) < 0)
228 return retval;
229 break;
230
231 case SND_DEV_MIDIN:
232 if ((retval = MIDIbuf_open(dev, file)) < 0)
233 return retval;
234 break;
235
236 case SND_DEV_DSP:
237 case SND_DEV_DSP16:
238 case SND_DEV_AUDIO:
239 if ((retval = audio_open(dev, file)) < 0)
240 return retval;
241 break;
242
243 default:
244 printk(KERN_ERR "Invalid minor device %d\n", dev);
245 return -ENXIO;
246 }
247
248 return 0;
249}
250
251static int sound_release(struct inode *inode, struct file *file)
252{
253 int dev = iminor(inode);
254
255 lock_kernel();
256 DEB(printk("sound_release(dev=%d)\n", dev));
257 switch (dev & 0x0f) {
258 case SND_DEV_CTL:
259 module_put(mixer_devs[dev >> 4]->owner);
260 break;
261
262 case SND_DEV_SEQ:
263 case SND_DEV_SEQ2:
264 sequencer_release(dev, file);
265 break;
266
267 case SND_DEV_MIDIN:
268 MIDIbuf_release(dev, file);
269 break;
270
271 case SND_DEV_DSP:
272 case SND_DEV_DSP16:
273 case SND_DEV_AUDIO:
274 audio_release(dev, file);
275 break;
276
277 default:
278 printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
279 }
280 unlock_kernel();
281
282 return 0;
283}
284
285static 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
297static 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
308static 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
329static int sound_ioctl(struct inode *inode, struct file *file,
330 unsigned int cmd, unsigned long arg)
331{
332 int len = 0, dtype;
333 int dev = iminor(inode);
334 void __user *p = (void __user *)arg;
335
336 if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
337 /*
338 * Have to validate the address given by the process.
339 */
340 len = _SIOC_SIZE(cmd);
341 if (len < 1 || len > 65536 || !p)
342 return -EFAULT;
343 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
344 if (!access_ok(VERIFY_READ, p, len))
345 return -EFAULT;
346 if (_SIOC_DIR(cmd) & _SIOC_READ)
347 if (!access_ok(VERIFY_WRITE, p, len))
348 return -EFAULT;
349 }
350 DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
351 if (cmd == OSS_GETVERSION)
352 return __put_user(SOUND_VERSION, (int __user *)p);
353
354 if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 && /* Mixer ioctl */
355 (dev & 0x0f) != SND_DEV_CTL) {
356 dtype = dev & 0x0f;
357 switch (dtype) {
358 case SND_DEV_DSP:
359 case SND_DEV_DSP16:
360 case SND_DEV_AUDIO:
361 return sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
362 cmd, p);
363
364 default:
365 return sound_mixer_ioctl(dev >> 4, cmd, p);
366 }
367 }
368 switch (dev & 0x0f) {
369 case SND_DEV_CTL:
370 if (cmd == SOUND_MIXER_GETLEVELS)
371 return get_mixer_levels(p);
372 if (cmd == SOUND_MIXER_SETLEVELS)
373 return set_mixer_levels(p);
374 return sound_mixer_ioctl(dev >> 4, cmd, p);
375
376 case SND_DEV_SEQ:
377 case SND_DEV_SEQ2:
378 return sequencer_ioctl(dev, file, cmd, p);
379
380 case SND_DEV_DSP:
381 case SND_DEV_DSP16:
382 case SND_DEV_AUDIO:
383 return audio_ioctl(dev, file, cmd, p);
384 break;
385
386 case SND_DEV_MIDIN:
387 return MIDIbuf_ioctl(dev, file, cmd, p);
388 break;
389
390 }
391 return -EINVAL;
392}
393
394static unsigned int sound_poll(struct file *file, poll_table * wait)
395{
Josef Sipek7bc56322006-12-08 02:37:40 -0800396 struct inode *inode = file->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 int dev = iminor(inode);
398
399 DEB(printk("sound_poll(dev=%d)\n", dev));
400 switch (dev & 0x0f) {
401 case SND_DEV_SEQ:
402 case SND_DEV_SEQ2:
403 return sequencer_poll(dev, file, wait);
404
405 case SND_DEV_MIDIN:
406 return MIDIbuf_poll(dev, file, wait);
407
408 case SND_DEV_DSP:
409 case SND_DEV_DSP16:
410 case SND_DEV_AUDIO:
411 return DMAbuf_poll(file, dev >> 4, wait);
412 }
413 return 0;
414}
415
416static int sound_mmap(struct file *file, struct vm_area_struct *vma)
417{
418 int dev_class;
419 unsigned long size;
420 struct dma_buffparms *dmap = NULL;
Josef Sipek7bc56322006-12-08 02:37:40 -0800421 int dev = iminor(file->f_path.dentry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
423 dev_class = dev & 0x0f;
424 dev >>= 4;
425
426 if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
427 printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
428 return -EINVAL;
429 }
430 lock_kernel();
431 if (vma->vm_flags & VM_WRITE) /* Map write and read/write to the output buf */
432 dmap = audio_devs[dev]->dmap_out;
433 else if (vma->vm_flags & VM_READ)
434 dmap = audio_devs[dev]->dmap_in;
435 else {
436 printk(KERN_ERR "Sound: Undefined mmap() access\n");
437 unlock_kernel();
438 return -EINVAL;
439 }
440
441 if (dmap == NULL) {
442 printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
443 unlock_kernel();
444 return -EIO;
445 }
446 if (dmap->raw_buf == NULL) {
447 printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
448 unlock_kernel();
449 return -EIO;
450 }
451 if (dmap->mapping_flags) {
452 printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
453 unlock_kernel();
454 return -EIO;
455 }
456 if (vma->vm_pgoff != 0) {
457 printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
458 unlock_kernel();
459 return -EINVAL;
460 }
461 size = vma->vm_end - vma->vm_start;
462
463 if (size != dmap->bytes_in_use) {
464 printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
465 }
466 if (remap_pfn_range(vma, vma->vm_start,
467 virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
468 vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
469 unlock_kernel();
470 return -EAGAIN;
471 }
472
473 dmap->mapping_flags |= DMA_MAP_MAPPED;
474
475 if( audio_devs[dev]->d->mmap)
476 audio_devs[dev]->d->mmap(dev);
477
478 memset(dmap->raw_buf,
479 dmap->neutral_byte,
480 dmap->bytes_in_use);
481 unlock_kernel();
482 return 0;
483}
484
485struct file_operations oss_sound_fops = {
486 .owner = THIS_MODULE,
487 .llseek = no_llseek,
488 .read = sound_read,
489 .write = sound_write,
490 .poll = sound_poll,
491 .ioctl = sound_ioctl,
492 .mmap = sound_mmap,
493 .open = sound_open,
494 .release = sound_release,
495};
496
497/*
498 * Create the required special subdevices
499 */
500
501static int create_special_devices(void)
502{
503 int seq1,seq2;
504 seq1=register_sound_special(&oss_sound_fops, 1);
505 if(seq1==-1)
506 goto bad;
507 seq2=register_sound_special(&oss_sound_fops, 8);
508 if(seq2!=-1)
509 return 0;
510 unregister_sound_special(1);
511bad:
512 return -1;
513}
514
515
516/* These device names follow the official Linux device list,
517 * Documentation/devices.txt. Let us know if there are other
518 * common names we should support for compatibility.
519 * Only those devices not created by the generic code in sound_core.c are
520 * registered here.
521 */
522static const struct {
523 unsigned short minor;
524 char *name;
525 umode_t mode;
526 int *num;
527} dev_list[] = { /* list of minor devices */
528/* seems to be some confusion here -- this device is not in the device list */
529 {SND_DEV_DSP16, "dspW", S_IWUGO | S_IRUSR | S_IRGRP,
530 &num_audiodevs},
531 {SND_DEV_AUDIO, "audio", S_IWUGO | S_IRUSR | S_IRGRP,
532 &num_audiodevs},
533};
534
535static int dmabuf;
536static int dmabug;
537
538module_param(dmabuf, int, 0444);
539module_param(dmabug, int, 0444);
540
541static int __init oss_init(void)
542{
543 int err;
544 int i, j;
545
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546#ifdef CONFIG_PCI
547 if(dmabug)
548 isa_dma_bridge_buggy = dmabug;
549#endif
550
551 err = create_special_devices();
552 if (err) {
553 printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
554 return err;
555 }
556
557 /* Protecting the innocent */
558 sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
559
560 for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -0700561 device_create(sound_class, NULL,
562 MKDEV(SOUND_MAJOR, dev_list[i].minor),
563 "%s", dev_list[i].name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565 if (!dev_list[i].num)
566 continue;
567
Greg Kroah-Hartman0936f262005-06-20 21:15:16 -0700568 for (j = 1; j < *dev_list[i].num; j++)
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -0700569 device_create(sound_class, NULL,
570 MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)),
571 "%s%d", dev_list[i].name, j);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 }
573
574 if (sound_nblocks >= 1024)
575 printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
576
577 return 0;
578}
579
580static void __exit oss_cleanup(void)
581{
582 int i, j;
583
584 for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -0700585 device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 if (!dev_list[i].num)
587 continue;
Greg Kroah-Hartman0936f262005-06-20 21:15:16 -0700588 for (j = 1; j < *dev_list[i].num; j++)
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -0700589 device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 }
591
592 unregister_sound_special(1);
593 unregister_sound_special(8);
594
595 sound_stop_timer();
596
597 sequencer_unload();
598
599 for (i = 0; i < MAX_DMA_CHANNELS; i++)
600 if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
601 printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
602 sound_free_dma(i);
603 }
604
605 for (i = 0; i < sound_nblocks; i++)
606 vfree(sound_mem_blocks[i]);
607
608}
609
610module_init(oss_init);
611module_exit(oss_cleanup);
612MODULE_LICENSE("GPL");
Adrian Bunkece7f772006-10-04 02:17:31 -0700613MODULE_DESCRIPTION("OSS Sound subsystem");
614MODULE_AUTHOR("Hannu Savolainen, et al.");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
616
617int sound_alloc_dma(int chn, char *deviceID)
618{
619 int err;
620
621 if ((err = request_dma(chn, deviceID)) != 0)
622 return err;
623
624 dma_alloc_map[chn] = DMA_MAP_FREE;
625
626 return 0;
627}
Adrian Bunkece7f772006-10-04 02:17:31 -0700628EXPORT_SYMBOL(sound_alloc_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
630int sound_open_dma(int chn, char *deviceID)
631{
632 if (!valid_dma(chn)) {
633 printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
634 return 1;
635 }
636
637 if (dma_alloc_map[chn] != DMA_MAP_FREE) {
638 printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
639 return 1;
640 }
641 dma_alloc_map[chn] = DMA_MAP_BUSY;
642 return 0;
643}
Adrian Bunkece7f772006-10-04 02:17:31 -0700644EXPORT_SYMBOL(sound_open_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
646void 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}
Adrian Bunkece7f772006-10-04 02:17:31 -0700655EXPORT_SYMBOL(sound_free_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
657void sound_close_dma(int chn)
658{
659 if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
660 printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
661 return;
662 }
663 dma_alloc_map[chn] = DMA_MAP_FREE;
664}
Adrian Bunkece7f772006-10-04 02:17:31 -0700665EXPORT_SYMBOL(sound_close_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
667static void do_sequencer_timer(unsigned long dummy)
668{
669 sequencer_timer(0);
670}
671
672
Ingo Molnar8d06afa2005-09-09 13:10:40 -0700673static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674
675void request_sound_timer(int count)
676{
677 extern unsigned long seq_time;
678
679 if (count < 0) {
680 seq_timer.expires = (-count) + jiffies;
681 add_timer(&seq_timer);
682 return;
683 }
684 count += seq_time;
685
686 count -= jiffies;
687
688 if (count < 1)
689 count = 1;
690
691 seq_timer.expires = (count) + jiffies;
692 add_timer(&seq_timer);
693}
694
695void sound_stop_timer(void)
696{
697 del_timer(&seq_timer);
698}
699
700void conf_printf(char *name, struct address_info *hw_config)
701{
702#ifndef CONFIG_SOUND_TRACEINIT
703 return;
704#else
705 printk("<%s> at 0x%03x", name, hw_config->io_base);
706
707 if (hw_config->irq)
708 printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
709
710 if (hw_config->dma != -1 || hw_config->dma2 != -1)
711 {
712 printk(" dma %d", hw_config->dma);
713 if (hw_config->dma2 != -1)
714 printk(",%d", hw_config->dma2);
715 }
716 printk("\n");
717#endif
718}
Adrian Bunkece7f772006-10-04 02:17:31 -0700719EXPORT_SYMBOL(conf_printf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
721void conf_printf2(char *name, int base, int irq, int dma, int dma2)
722{
723#ifndef CONFIG_SOUND_TRACEINIT
724 return;
725#else
726 printk("<%s> at 0x%03x", name, base);
727
728 if (irq)
729 printk(" irq %d", (irq > 0) ? irq : -irq);
730
731 if (dma != -1 || dma2 != -1)
732 {
733 printk(" dma %d", dma);
734 if (dma2 != -1)
735 printk(",%d", dma2);
736 }
737 printk("\n");
738#endif
739}
Adrian Bunkece7f772006-10-04 02:17:31 -0700740EXPORT_SYMBOL(conf_printf2);
741