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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
50
51#ifndef valid_dma
52#define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4)
53#endif
54
55
56
57
58void * sound_mem_blocks[MAX_MEM_BLOCKS];
59static DEFINE_MUTEX(soundcard_mutex);
60int sound_nblocks = 0;
61
62
63#ifdef CONFIG_SOUND_DMAP
64int sound_dmap_flag = 1;
65#else
66int sound_dmap_flag = 0;
67#endif
68
69static 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
76unsigned long seq_time = 0;
77extern struct class *sound_class;
78
79
80
81
82static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
83static int num_mixer_volumes;
84
85int *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}
113EXPORT_SYMBOL(load_mixer_volumes);
114
115static int set_mixer_levels(void __user * arg)
116{
117
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
128static 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
142#define PROC_BLOCK_SIZE (3*1024)
143
144static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
145{
146 int dev = iminor(file->f_path.dentry->d_inode);
147 int ret = -EINVAL;
148
149
150
151
152
153
154
155 mutex_lock(&soundcard_mutex);
156
157 DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
158 switch (dev & 0x0f) {
159 case SND_DEV_DSP:
160 case SND_DEV_DSP16:
161 case SND_DEV_AUDIO:
162 ret = audio_read(dev, file, buf, count);
163 break;
164
165 case SND_DEV_SEQ:
166 case SND_DEV_SEQ2:
167 ret = sequencer_read(dev, file, buf, count);
168 break;
169
170 case SND_DEV_MIDIN:
171 ret = MIDIbuf_read(dev, file, buf, count);
172 }
173 mutex_unlock(&soundcard_mutex);
174 return ret;
175}
176
177static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
178{
179 int dev = iminor(file->f_path.dentry->d_inode);
180 int ret = -EINVAL;
181
182 mutex_lock(&soundcard_mutex);
183 DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
184 switch (dev & 0x0f) {
185 case SND_DEV_SEQ:
186 case SND_DEV_SEQ2:
187 ret = sequencer_write(dev, file, buf, count);
188 break;
189
190 case SND_DEV_DSP:
191 case SND_DEV_DSP16:
192 case SND_DEV_AUDIO:
193 ret = audio_write(dev, file, buf, count);
194 break;
195
196 case SND_DEV_MIDIN:
197 ret = MIDIbuf_write(dev, file, buf, count);
198 break;
199 }
200 mutex_unlock(&soundcard_mutex);
201 return ret;
202}
203
204static int sound_open(struct inode *inode, struct file *file)
205{
206 int dev = iminor(inode);
207 int retval;
208
209 DEB(printk("sound_open(dev=%d)\n", dev));
210 if ((dev >= SND_NDEVS) || (dev < 0)) {
211 printk(KERN_ERR "Invalid minor device %d\n", dev);
212 return -ENXIO;
213 }
214 mutex_lock(&soundcard_mutex);
215 switch (dev & 0x0f) {
216 case SND_DEV_CTL:
217 dev >>= 4;
218 if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
219 request_module("mixer%d", dev);
220 }
221 retval = -ENXIO;
222 if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
223 break;
224
225 if (!try_module_get(mixer_devs[dev]->owner))
226 break;
227
228 retval = 0;
229 break;
230
231 case SND_DEV_SEQ:
232 case SND_DEV_SEQ2:
233 retval = sequencer_open(dev, file);
234 break;
235
236 case SND_DEV_MIDIN:
237 retval = MIDIbuf_open(dev, file);
238 break;
239
240 case SND_DEV_DSP:
241 case SND_DEV_DSP16:
242 case SND_DEV_AUDIO:
243 retval = audio_open(dev, file);
244 break;
245
246 default:
247 printk(KERN_ERR "Invalid minor device %d\n", dev);
248 retval = -ENXIO;
249 }
250
251 mutex_unlock(&soundcard_mutex);
252 return retval;
253}
254
255static int sound_release(struct inode *inode, struct file *file)
256{
257 int dev = iminor(inode);
258
259 mutex_lock(&soundcard_mutex);
260 DEB(printk("sound_release(dev=%d)\n", dev));
261 switch (dev & 0x0f) {
262 case SND_DEV_CTL:
263 module_put(mixer_devs[dev >> 4]->owner);
264 break;
265
266 case SND_DEV_SEQ:
267 case SND_DEV_SEQ2:
268 sequencer_release(dev, file);
269 break;
270
271 case SND_DEV_MIDIN:
272 MIDIbuf_release(dev, file);
273 break;
274
275 case SND_DEV_DSP:
276 case SND_DEV_DSP16:
277 case SND_DEV_AUDIO:
278 audio_release(dev, file);
279 break;
280
281 default:
282 printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
283 }
284 mutex_unlock(&soundcard_mutex);
285
286 return 0;
287}
288
289static int get_mixer_info(int dev, void __user *arg)
290{
291 mixer_info info;
292 memset(&info, 0, sizeof(info));
293 strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
294 strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
295 info.modify_counter = mixer_devs[dev]->modify_counter;
296 if (__copy_to_user(arg, &info, sizeof(info)))
297 return -EFAULT;
298 return 0;
299}
300
301static int get_old_mixer_info(int dev, void __user *arg)
302{
303 _old_mixer_info info;
304 memset(&info, 0, sizeof(info));
305 strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
306 strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
307 if (copy_to_user(arg, &info, sizeof(info)))
308 return -EFAULT;
309 return 0;
310}
311
312static int sound_mixer_ioctl(int mixdev, unsigned int cmd, void __user *arg)
313{
314 if (mixdev < 0 || mixdev >= MAX_MIXER_DEV)
315 return -ENXIO;
316
317 if (mixer_devs[mixdev] == NULL) {
318 request_module("mixer%d", mixdev);
319 }
320 if (mixdev >= num_mixers || !mixer_devs[mixdev])
321 return -ENXIO;
322 if (cmd == SOUND_MIXER_INFO)
323 return get_mixer_info(mixdev, arg);
324 if (cmd == SOUND_OLD_MIXER_INFO)
325 return get_old_mixer_info(mixdev, arg);
326 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
327 mixer_devs[mixdev]->modify_counter++;
328 if (!mixer_devs[mixdev]->ioctl)
329 return -EINVAL;
330 return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg);
331}
332
333static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
334{
335 int len = 0, dtype;
336 int dev = iminor(file->f_dentry->d_inode);
337 long ret = -EINVAL;
338 void __user *p = (void __user *)arg;
339
340 if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
341
342
343
344 len = _SIOC_SIZE(cmd);
345 if (len < 1 || len > 65536 || !p)
346 return -EFAULT;
347 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
348 if (!access_ok(VERIFY_READ, p, len))
349 return -EFAULT;
350 if (_SIOC_DIR(cmd) & _SIOC_READ)
351 if (!access_ok(VERIFY_WRITE, p, len))
352 return -EFAULT;
353 }
354 DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
355 if (cmd == OSS_GETVERSION)
356 return __put_user(SOUND_VERSION, (int __user *)p);
357
358 mutex_lock(&soundcard_mutex);
359 if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 &&
360 (dev & 0x0f) != SND_DEV_CTL) {
361 dtype = dev & 0x0f;
362 switch (dtype) {
363 case SND_DEV_DSP:
364 case SND_DEV_DSP16:
365 case SND_DEV_AUDIO:
366 ret = sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
367 cmd, p);
368 break;
369 default:
370 ret = sound_mixer_ioctl(dev >> 4, cmd, p);
371 break;
372 }
373 mutex_unlock(&soundcard_mutex);
374 return ret;
375 }
376
377 switch (dev & 0x0f) {
378 case SND_DEV_CTL:
379 if (cmd == SOUND_MIXER_GETLEVELS)
380 ret = get_mixer_levels(p);
381 else if (cmd == SOUND_MIXER_SETLEVELS)
382 ret = set_mixer_levels(p);
383 else
384 ret = sound_mixer_ioctl(dev >> 4, cmd, p);
385 break;
386
387 case SND_DEV_SEQ:
388 case SND_DEV_SEQ2:
389 ret = sequencer_ioctl(dev, file, cmd, p);
390 break;
391
392 case SND_DEV_DSP:
393 case SND_DEV_DSP16:
394 case SND_DEV_AUDIO:
395 ret = audio_ioctl(dev, file, cmd, p);
396 break;
397
398 case SND_DEV_MIDIN:
399 ret = MIDIbuf_ioctl(dev, file, cmd, p);
400 break;
401
402 }
403 mutex_unlock(&soundcard_mutex);
404 return ret;
405}
406
407static unsigned int sound_poll(struct file *file, poll_table * wait)
408{
409 struct inode *inode = file->f_path.dentry->d_inode;
410 int dev = iminor(inode);
411
412 DEB(printk("sound_poll(dev=%d)\n", dev));
413 switch (dev & 0x0f) {
414 case SND_DEV_SEQ:
415 case SND_DEV_SEQ2:
416 return sequencer_poll(dev, file, wait);
417
418 case SND_DEV_MIDIN:
419 return MIDIbuf_poll(dev, file, wait);
420
421 case SND_DEV_DSP:
422 case SND_DEV_DSP16:
423 case SND_DEV_AUDIO:
424 return DMAbuf_poll(file, dev >> 4, wait);
425 }
426 return 0;
427}
428
429static int sound_mmap(struct file *file, struct vm_area_struct *vma)
430{
431 int dev_class;
432 unsigned long size;
433 struct dma_buffparms *dmap = NULL;
434 int dev = iminor(file->f_path.dentry->d_inode);
435
436 dev_class = dev & 0x0f;
437 dev >>= 4;
438
439 if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
440 printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
441 return -EINVAL;
442 }
443 mutex_lock(&soundcard_mutex);
444 if (vma->vm_flags & VM_WRITE)
445 dmap = audio_devs[dev]->dmap_out;
446 else if (vma->vm_flags & VM_READ)
447 dmap = audio_devs[dev]->dmap_in;
448 else {
449 printk(KERN_ERR "Sound: Undefined mmap() access\n");
450 mutex_unlock(&soundcard_mutex);
451 return -EINVAL;
452 }
453
454 if (dmap == NULL) {
455 printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
456 mutex_unlock(&soundcard_mutex);
457 return -EIO;
458 }
459 if (dmap->raw_buf == NULL) {
460 printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
461 mutex_unlock(&soundcard_mutex);
462 return -EIO;
463 }
464 if (dmap->mapping_flags) {
465 printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
466 mutex_unlock(&soundcard_mutex);
467 return -EIO;
468 }
469 if (vma->vm_pgoff != 0) {
470 printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
471 mutex_unlock(&soundcard_mutex);
472 return -EINVAL;
473 }
474 size = vma->vm_end - vma->vm_start;
475
476 if (size != dmap->bytes_in_use) {
477 printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
478 }
479 if (remap_pfn_range(vma, vma->vm_start,
480 virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
481 vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
482 mutex_unlock(&soundcard_mutex);
483 return -EAGAIN;
484 }
485
486 dmap->mapping_flags |= DMA_MAP_MAPPED;
487
488 if( audio_devs[dev]->d->mmap)
489 audio_devs[dev]->d->mmap(dev);
490
491 memset(dmap->raw_buf,
492 dmap->neutral_byte,
493 dmap->bytes_in_use);
494 mutex_unlock(&soundcard_mutex);
495 return 0;
496}
497
498const struct file_operations oss_sound_fops = {
499 .owner = THIS_MODULE,
500 .llseek = no_llseek,
501 .read = sound_read,
502 .write = sound_write,
503 .poll = sound_poll,
504 .unlocked_ioctl = sound_ioctl,
505 .mmap = sound_mmap,
506 .open = sound_open,
507 .release = sound_release,
508};
509
510
511
512
513
514static int create_special_devices(void)
515{
516 int seq1,seq2;
517 seq1=register_sound_special(&oss_sound_fops, 1);
518 if(seq1==-1)
519 goto bad;
520 seq2=register_sound_special(&oss_sound_fops, 8);
521 if(seq2!=-1)
522 return 0;
523 unregister_sound_special(1);
524bad:
525 return -1;
526}
527
528
529static int dmabuf;
530static int dmabug;
531
532module_param(dmabuf, int, 0444);
533module_param(dmabug, int, 0444);
534
535
536struct oss_minor_dev {
537 unsigned short minor;
538 unsigned int enabled;
539} dev_list[] = {
540 { SND_DEV_DSP16 },
541 { SND_DEV_AUDIO },
542};
543
544static int __init oss_init(void)
545{
546 int err;
547 int i, j;
548
549#ifdef CONFIG_PCI
550 if(dmabug)
551 isa_dma_bridge_buggy = dmabug;
552#endif
553
554 err = create_special_devices();
555 if (err) {
556 printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
557 return err;
558 }
559
560
561 sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
562
563 for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
564 j = 0;
565 do {
566 unsigned short minor = dev_list[i].minor + j * 0x10;
567 if (!register_sound_special(&oss_sound_fops, minor))
568 dev_list[i].enabled = (1 << j);
569 } while (++j < num_audiodevs);
570 }
571
572 if (sound_nblocks >= MAX_MEM_BLOCKS - 1)
573 printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
574
575 return 0;
576}
577
578static void __exit oss_cleanup(void)
579{
580 int i, j;
581
582 for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
583 j = 0;
584 do {
585 if (dev_list[i].enabled & (1 << j))
586 unregister_sound_special(dev_list[i].minor);
587 } while (++j < num_audiodevs);
588 }
589
590 unregister_sound_special(1);
591 unregister_sound_special(8);
592
593 sound_stop_timer();
594
595 sequencer_unload();
596
597 for (i = 0; i < MAX_DMA_CHANNELS; i++)
598 if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
599 printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
600 sound_free_dma(i);
601 }
602
603 for (i = 0; i < sound_nblocks; i++)
604 vfree(sound_mem_blocks[i]);
605
606}
607
608module_init(oss_init);
609module_exit(oss_cleanup);
610MODULE_LICENSE("GPL");
611MODULE_DESCRIPTION("OSS Sound subsystem");
612MODULE_AUTHOR("Hannu Savolainen, et al.");
613
614
615int sound_alloc_dma(int chn, char *deviceID)
616{
617 int err;
618
619 if ((err = request_dma(chn, deviceID)) != 0)
620 return err;
621
622 dma_alloc_map[chn] = DMA_MAP_FREE;
623
624 return 0;
625}
626EXPORT_SYMBOL(sound_alloc_dma);
627
628int sound_open_dma(int chn, char *deviceID)
629{
630 if (!valid_dma(chn)) {
631 printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
632 return 1;
633 }
634
635 if (dma_alloc_map[chn] != DMA_MAP_FREE) {
636 printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
637 return 1;
638 }
639 dma_alloc_map[chn] = DMA_MAP_BUSY;
640 return 0;
641}
642EXPORT_SYMBOL(sound_open_dma);
643
644void sound_free_dma(int chn)
645{
646 if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) {
647
648 return;
649 }
650 free_dma(chn);
651 dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
652}
653EXPORT_SYMBOL(sound_free_dma);
654
655void sound_close_dma(int chn)
656{
657 if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
658 printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
659 return;
660 }
661 dma_alloc_map[chn] = DMA_MAP_FREE;
662}
663EXPORT_SYMBOL(sound_close_dma);
664
665static void do_sequencer_timer(unsigned long dummy)
666{
667 sequencer_timer(0);
668}
669
670
671static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);
672
673void request_sound_timer(int count)
674{
675 extern unsigned long seq_time;
676
677 if (count < 0) {
678 seq_timer.expires = (-count) + jiffies;
679 add_timer(&seq_timer);
680 return;
681 }
682 count += seq_time;
683
684 count -= jiffies;
685
686 if (count < 1)
687 count = 1;
688
689 seq_timer.expires = (count) + jiffies;
690 add_timer(&seq_timer);
691}
692
693void sound_stop_timer(void)
694{
695 del_timer(&seq_timer);
696}
697
698void conf_printf(char *name, struct address_info *hw_config)
699{
700#ifndef CONFIG_SOUND_TRACEINIT
701 return;
702#else
703 printk("<%s> at 0x%03x", name, hw_config->io_base);
704
705 if (hw_config->irq)
706 printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
707
708 if (hw_config->dma != -1 || hw_config->dma2 != -1)
709 {
710 printk(" dma %d", hw_config->dma);
711 if (hw_config->dma2 != -1)
712 printk(",%d", hw_config->dma2);
713 }
714 printk("\n");
715#endif
716}
717EXPORT_SYMBOL(conf_printf);
718
719void conf_printf2(char *name, int base, int irq, int dma, int dma2)
720{
721#ifndef CONFIG_SOUND_TRACEINIT
722 return;
723#else
724 printk("<%s> at 0x%03x", name, base);
725
726 if (irq)
727 printk(" irq %d", (irq > 0) ? irq : -irq);
728
729 if (dma != -1 || dma2 != -1)
730 {
731 printk(" dma %d", dma);
732 if (dma2 != -1)
733 printk(",%d", dma2);
734 }
735 printk("\n");
736#endif
737}
738EXPORT_SYMBOL(conf_printf2);
739
740
