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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/slab.h>
40#include <linux/ioport.h>
41#include <linux/major.h>
42#include <linux/delay.h>
43#include <linux/proc_fs.h>
44#include <linux/smp_lock.h>
45#include <linux/module.h>
46#include <linux/mm.h>
47#include <linux/device.h>
48
49
50
51
52#ifndef valid_dma
53#define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4)
54#endif
55
56
57
58
59void * sound_mem_blocks[1024];
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 (strcmp(name, mixer_vols[i].name) == 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 strcpy(mixer_vols[n].name, name);
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 lock_kernel();
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 unlock_kernel();
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 lock_kernel();
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 unlock_kernel();
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 switch (dev & 0x0f) {
215 case SND_DEV_CTL:
216 dev >>= 4;
217 if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
218 request_module("mixer%d", dev);
219 }
220 if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
221 return -ENXIO;
222
223 if (!try_module_get(mixer_devs[dev]->owner))
224 return -ENXIO;
225 break;
226
227 case SND_DEV_SEQ:
228 case SND_DEV_SEQ2:
229 if ((retval = sequencer_open(dev, file)) < 0)
230 return retval;
231 break;
232
233 case SND_DEV_MIDIN:
234 if ((retval = MIDIbuf_open(dev, file)) < 0)
235 return retval;
236 break;
237
238 case SND_DEV_DSP:
239 case SND_DEV_DSP16:
240 case SND_DEV_AUDIO:
241 if ((retval = audio_open(dev, file)) < 0)
242 return retval;
243 break;
244
245 default:
246 printk(KERN_ERR "Invalid minor device %d\n", dev);
247 return -ENXIO;
248 }
249
250 return 0;
251}
252
253static int sound_release(struct inode *inode, struct file *file)
254{
255 int dev = iminor(inode);
256
257 lock_kernel();
258 DEB(printk("sound_release(dev=%d)\n", dev));
259 switch (dev & 0x0f) {
260 case SND_DEV_CTL:
261 module_put(mixer_devs[dev >> 4]->owner);
262 break;
263
264 case SND_DEV_SEQ:
265 case SND_DEV_SEQ2:
266 sequencer_release(dev, file);
267 break;
268
269 case SND_DEV_MIDIN:
270 MIDIbuf_release(dev, file);
271 break;
272
273 case SND_DEV_DSP:
274 case SND_DEV_DSP16:
275 case SND_DEV_AUDIO:
276 audio_release(dev, file);
277 break;
278
279 default:
280 printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
281 }
282 unlock_kernel();
283
284 return 0;
285}
286
287static int get_mixer_info(int dev, void __user *arg)
288{
289 mixer_info info;
290 memset(&info, 0, sizeof(info));
291 strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
292 strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
293 info.modify_counter = mixer_devs[dev]->modify_counter;
294 if (__copy_to_user(arg, &info, sizeof(info)))
295 return -EFAULT;
296 return 0;
297}
298
299static int get_old_mixer_info(int dev, void __user *arg)
300{
301 _old_mixer_info info;
302 memset(&info, 0, sizeof(info));
303 strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
304 strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
305 if (copy_to_user(arg, &info, sizeof(info)))
306 return -EFAULT;
307 return 0;
308}
309
310static int sound_mixer_ioctl(int mixdev, unsigned int cmd, void __user *arg)
311{
312 if (mixdev < 0 || mixdev >= MAX_MIXER_DEV)
313 return -ENXIO;
314
315 if (mixer_devs[mixdev] == NULL) {
316 request_module("mixer%d", mixdev);
317 }
318 if (mixdev >= num_mixers || !mixer_devs[mixdev])
319 return -ENXIO;
320 if (cmd == SOUND_MIXER_INFO)
321 return get_mixer_info(mixdev, arg);
322 if (cmd == SOUND_OLD_MIXER_INFO)
323 return get_old_mixer_info(mixdev, arg);
324 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
325 mixer_devs[mixdev]->modify_counter++;
326 if (!mixer_devs[mixdev]->ioctl)
327 return -EINVAL;
328 return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg);
329}
330
331static int sound_ioctl(struct inode *inode, struct file *file,
332 unsigned int cmd, unsigned long arg)
333{
334 int len = 0, dtype;
335 int dev = iminor(inode);
336 void __user *p = (void __user *)arg;
337
338 if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
339
340
341
342 len = _SIOC_SIZE(cmd);
343 if (len < 1 || len > 65536 || !p)
344 return -EFAULT;
345 if (_SIOC_DIR(cmd) & _SIOC_WRITE)
346 if (!access_ok(VERIFY_READ, p, len))
347 return -EFAULT;
348 if (_SIOC_DIR(cmd) & _SIOC_READ)
349 if (!access_ok(VERIFY_WRITE, p, len))
350 return -EFAULT;
351 }
352 DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
353 if (cmd == OSS_GETVERSION)
354 return __put_user(SOUND_VERSION, (int __user *)p);
355
356 if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 &&
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 return sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
364 cmd, p);
365
366 default:
367 return sound_mixer_ioctl(dev >> 4, cmd, p);
368 }
369 }
370 switch (dev & 0x0f) {
371 case SND_DEV_CTL:
372 if (cmd == SOUND_MIXER_GETLEVELS)
373 return get_mixer_levels(p);
374 if (cmd == SOUND_MIXER_SETLEVELS)
375 return set_mixer_levels(p);
376 return sound_mixer_ioctl(dev >> 4, cmd, p);
377
378 case SND_DEV_SEQ:
379 case SND_DEV_SEQ2:
380 return sequencer_ioctl(dev, file, cmd, p);
381
382 case SND_DEV_DSP:
383 case SND_DEV_DSP16:
384 case SND_DEV_AUDIO:
385 return audio_ioctl(dev, file, cmd, p);
386 break;
387
388 case SND_DEV_MIDIN:
389 return MIDIbuf_ioctl(dev, file, cmd, p);
390 break;
391
392 }
393 return -EINVAL;
394}
395
396static unsigned int sound_poll(struct file *file, poll_table * wait)
397{
398 struct inode *inode = file->f_path.dentry->d_inode;
399 int dev = iminor(inode);
400
401 DEB(printk("sound_poll(dev=%d)\n", dev));
402 switch (dev & 0x0f) {
403 case SND_DEV_SEQ:
404 case SND_DEV_SEQ2:
405 return sequencer_poll(dev, file, wait);
406
407 case SND_DEV_MIDIN:
408 return MIDIbuf_poll(dev, file, wait);
409
410 case SND_DEV_DSP:
411 case SND_DEV_DSP16:
412 case SND_DEV_AUDIO:
413 return DMAbuf_poll(file, dev >> 4, wait);
414 }
415 return 0;
416}
417
418static int sound_mmap(struct file *file, struct vm_area_struct *vma)
419{
420 int dev_class;
421 unsigned long size;
422 struct dma_buffparms *dmap = NULL;
423 int dev = iminor(file->f_path.dentry->d_inode);
424
425 dev_class = dev & 0x0f;
426 dev >>= 4;
427
428 if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
429 printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
430 return -EINVAL;
431 }
432 lock_kernel();
433 if (vma->vm_flags & VM_WRITE)
434 dmap = audio_devs[dev]->dmap_out;
435 else if (vma->vm_flags & VM_READ)
436 dmap = audio_devs[dev]->dmap_in;
437 else {
438 printk(KERN_ERR "Sound: Undefined mmap() access\n");
439 unlock_kernel();
440 return -EINVAL;
441 }
442
443 if (dmap == NULL) {
444 printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
445 unlock_kernel();
446 return -EIO;
447 }
448 if (dmap->raw_buf == NULL) {
449 printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
450 unlock_kernel();
451 return -EIO;
452 }
453 if (dmap->mapping_flags) {
454 printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
455 unlock_kernel();
456 return -EIO;
457 }
458 if (vma->vm_pgoff != 0) {
459 printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
460 unlock_kernel();
461 return -EINVAL;
462 }
463 size = vma->vm_end - vma->vm_start;
464
465 if (size != dmap->bytes_in_use) {
466 printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
467 }
468 if (remap_pfn_range(vma, vma->vm_start,
469 virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
470 vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
471 unlock_kernel();
472 return -EAGAIN;
473 }
474
475 dmap->mapping_flags |= DMA_MAP_MAPPED;
476
477 if( audio_devs[dev]->d->mmap)
478 audio_devs[dev]->d->mmap(dev);
479
480 memset(dmap->raw_buf,
481 dmap->neutral_byte,
482 dmap->bytes_in_use);
483 unlock_kernel();
484 return 0;
485}
486
487const struct file_operations oss_sound_fops = {
488 .owner = THIS_MODULE,
489 .llseek = no_llseek,
490 .read = sound_read,
491 .write = sound_write,
492 .poll = sound_poll,
493 .ioctl = sound_ioctl,
494 .mmap = sound_mmap,
495 .open = sound_open,
496 .release = sound_release,
497};
498
499
500
501
502
503static int create_special_devices(void)
504{
505 int seq1,seq2;
506 seq1=register_sound_special(&oss_sound_fops, 1);
507 if(seq1==-1)
508 goto bad;
509 seq2=register_sound_special(&oss_sound_fops, 8);
510 if(seq2!=-1)
511 return 0;
512 unregister_sound_special(1);
513bad:
514 return -1;
515}
516
517
518
519
520
521
522
523
524static const struct {
525 unsigned short minor;
526 char *name;
527 umode_t mode;
528 int *num;
529} dev_list[] = {
530
531 {SND_DEV_DSP16, "dspW", S_IWUGO | S_IRUSR | S_IRGRP,
532 &num_audiodevs},
533 {SND_DEV_AUDIO, "audio", S_IWUGO | S_IRUSR | S_IRGRP,
534 &num_audiodevs},
535};
536
537static int dmabuf;
538static int dmabug;
539
540module_param(dmabuf, int, 0444);
541module_param(dmabug, int, 0444);
542
543static int __init oss_init(void)
544{
545 int err;
546 int i, j;
547
548#ifdef CONFIG_PCI
549 if(dmabug)
550 isa_dma_bridge_buggy = dmabug;
551#endif
552
553 err = create_special_devices();
554 if (err) {
555 printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
556 return err;
557 }
558
559
560 sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
561
562 for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
563 device_create(sound_class, NULL,
564 MKDEV(SOUND_MAJOR, dev_list[i].minor), NULL,
565 "%s", dev_list[i].name);
566
567 if (!dev_list[i].num)
568 continue;
569
570 for (j = 1; j < *dev_list[i].num; j++)
571 device_create(sound_class, NULL,
572 MKDEV(SOUND_MAJOR,
573 dev_list[i].minor + (j*0x10)),
574 NULL, "%s%d", dev_list[i].name, j);
575 }
576
577 if (sound_nblocks >= 1024)
578 printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
579
580 return 0;
581}
582
583static void __exit oss_cleanup(void)
584{
585 int i, j;
586
587 for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
588 device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
589 if (!dev_list[i].num)
590 continue;
591 for (j = 1; j < *dev_list[i].num; j++)
592 device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
593 }
594
595 unregister_sound_special(1);
596 unregister_sound_special(8);
597
598 sound_stop_timer();
599
600 sequencer_unload();
601
602 for (i = 0; i < MAX_DMA_CHANNELS; i++)
603 if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
604 printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
605 sound_free_dma(i);
606 }
607
608 for (i = 0; i < sound_nblocks; i++)
609 vfree(sound_mem_blocks[i]);
610
611}
612
613module_init(oss_init);
614module_exit(oss_cleanup);
615MODULE_LICENSE("GPL");
616MODULE_DESCRIPTION("OSS Sound subsystem");
617MODULE_AUTHOR("Hannu Savolainen, et al.");
618
619
620int sound_alloc_dma(int chn, char *deviceID)
621{
622 int err;
623
624 if ((err = request_dma(chn, deviceID)) != 0)
625 return err;
626
627 dma_alloc_map[chn] = DMA_MAP_FREE;
628
629 return 0;
630}
631EXPORT_SYMBOL(sound_alloc_dma);
632
633int sound_open_dma(int chn, char *deviceID)
634{
635 if (!valid_dma(chn)) {
636 printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
637 return 1;
638 }
639
640 if (dma_alloc_map[chn] != DMA_MAP_FREE) {
641 printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
642 return 1;
643 }
644 dma_alloc_map[chn] = DMA_MAP_BUSY;
645 return 0;
646}
647EXPORT_SYMBOL(sound_open_dma);
648
649void sound_free_dma(int chn)
650{
651 if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) {
652
653 return;
654 }
655 free_dma(chn);
656 dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
657}
658EXPORT_SYMBOL(sound_free_dma);
659
660void sound_close_dma(int chn)
661{
662 if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
663 printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
664 return;
665 }
666 dma_alloc_map[chn] = DMA_MAP_FREE;
667}
668EXPORT_SYMBOL(sound_close_dma);
669
670static void do_sequencer_timer(unsigned long dummy)
671{
672 sequencer_timer(0);
673}
674
675
676static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);
677
678void request_sound_timer(int count)
679{
680 extern unsigned long seq_time;
681
682 if (count < 0) {
683 seq_timer.expires = (-count) + jiffies;
684 add_timer(&seq_timer);
685 return;
686 }
687 count += seq_time;
688
689 count -= jiffies;
690
691 if (count < 1)
692 count = 1;
693
694 seq_timer.expires = (count) + jiffies;
695 add_timer(&seq_timer);
696}
697
698void sound_stop_timer(void)
699{
700 del_timer(&seq_timer);
701}
702
703void conf_printf(char *name, struct address_info *hw_config)
704{
705#ifndef CONFIG_SOUND_TRACEINIT
706 return;
707#else
708 printk("<%s> at 0x%03x", name, hw_config->io_base);
709
710 if (hw_config->irq)
711 printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
712
713 if (hw_config->dma != -1 || hw_config->dma2 != -1)
714 {
715 printk(" dma %d", hw_config->dma);
716 if (hw_config->dma2 != -1)
717 printk(",%d", hw_config->dma2);
718 }
719 printk("\n");
720#endif
721}
722EXPORT_SYMBOL(conf_printf);
723
724void conf_printf2(char *name, int base, int irq, int dma, int dma2)
725{
726#ifndef CONFIG_SOUND_TRACEINIT
727 return;
728#else
729 printk("<%s> at 0x%03x", name, base);
730
731 if (irq)
732 printk(" irq %d", (irq > 0) ? irq : -irq);
733
734 if (dma != -1 || dma2 != -1)
735 {
736 printk(" dma %d", dma);
737 if (dma2 != -1)
738 printk(",%d", dma2);
739 }
740 printk("\n");
741#endif
742}
743EXPORT_SYMBOL(conf_printf2);
744
745
