Commit | Line | Data |
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1da177e4 | 1 | /* |
f30c2269 | 2 | * linux/sound/oss/soundcard.c |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 <asm/dma.h> | |
36 | #include <asm/io.h> | |
37 | #include <linux/wait.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/ioport.h> | |
1da177e4 LT |
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> | |
f23f6e08 | 45 | #include <linux/mm.h> |
1da177e4 LT |
46 | |
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 | */ | |
57 | void * sound_mem_blocks[1024]; | |
58 | int sound_nblocks = 0; | |
59 | ||
60 | /* Persistent DMA buffers */ | |
61 | #ifdef CONFIG_SOUND_DMAP | |
62 | int sound_dmap_flag = 1; | |
63 | #else | |
64 | int sound_dmap_flag = 0; | |
65 | #endif | |
66 | ||
67 | static 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 | ||
74 | unsigned long seq_time = 0; /* Time for /dev/sequencer */ | |
619e666b | 75 | extern struct class *sound_class; |
1da177e4 LT |
76 | |
77 | /* | |
78 | * Table for configurable mixer volume handling | |
79 | */ | |
80 | static mixer_vol_table mixer_vols[MAX_MIXER_DEV]; | |
81 | static int num_mixer_volumes; | |
82 | ||
83 | int *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 | } | |
ece7f77b | 111 | EXPORT_SYMBOL(load_mixer_volumes); |
1da177e4 LT |
112 | |
113 | static 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 | ||
126 | static 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 | ||
142 | static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
143 | { | |
144 | int dev = iminor(file->f_dentry->d_inode); | |
145 | 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 | ||
175 | static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
176 | { | |
177 | int dev = iminor(file->f_dentry->d_inode); | |
178 | 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 | ||
202 | static 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 | ||
251 | static 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 | ||
285 | static 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 | ||
297 | static 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 | ||
308 | static 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 | ||
329 | static 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 | ||
394 | static unsigned int sound_poll(struct file *file, poll_table * wait) | |
395 | { | |
396 | struct inode *inode = file->f_dentry->d_inode; | |
397 | 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 | ||
416 | static 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; | |
421 | int dev = iminor(file->f_dentry->d_inode); | |
422 | ||
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 | ||
485 | struct 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 | ||
501 | static 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); | |
511 | bad: | |
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 | */ | |
522 | static 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 | ||
535 | static int dmabuf; | |
536 | static int dmabug; | |
537 | ||
538 | module_param(dmabuf, int, 0444); | |
539 | module_param(dmabug, int, 0444); | |
540 | ||
541 | static int __init oss_init(void) | |
542 | { | |
543 | int err; | |
544 | int i, j; | |
545 | ||
1da177e4 LT |
546 | #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++) { | |
d80f19fa GKH |
561 | device_create(sound_class, NULL, |
562 | MKDEV(SOUND_MAJOR, dev_list[i].minor), | |
563 | "%s", dev_list[i].name); | |
1da177e4 LT |
564 | |
565 | if (!dev_list[i].num) | |
566 | continue; | |
567 | ||
0936f26f | 568 | for (j = 1; j < *dev_list[i].num; j++) |
d80f19fa GKH |
569 | device_create(sound_class, NULL, |
570 | MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)), | |
571 | "%s%d", dev_list[i].name, j); | |
1da177e4 LT |
572 | } |
573 | ||
574 | if (sound_nblocks >= 1024) | |
575 | printk(KERN_ERR "Sound warning: Deallocation table was too small.\n"); | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
580 | static void __exit oss_cleanup(void) | |
581 | { | |
582 | int i, j; | |
583 | ||
584 | for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) { | |
d80f19fa | 585 | device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor)); |
1da177e4 LT |
586 | if (!dev_list[i].num) |
587 | continue; | |
0936f26f | 588 | for (j = 1; j < *dev_list[i].num; j++) |
d80f19fa | 589 | device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10))); |
1da177e4 LT |
590 | } |
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 | ||
610 | module_init(oss_init); | |
611 | module_exit(oss_cleanup); | |
612 | MODULE_LICENSE("GPL"); | |
ece7f77b AB |
613 | MODULE_DESCRIPTION("OSS Sound subsystem"); |
614 | MODULE_AUTHOR("Hannu Savolainen, et al."); | |
1da177e4 LT |
615 | |
616 | ||
617 | int 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 | } | |
ece7f77b | 628 | EXPORT_SYMBOL(sound_alloc_dma); |
1da177e4 LT |
629 | |
630 | int 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 | } | |
ece7f77b | 644 | EXPORT_SYMBOL(sound_open_dma); |
1da177e4 LT |
645 | |
646 | void 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 | } | |
ece7f77b | 655 | EXPORT_SYMBOL(sound_free_dma); |
1da177e4 LT |
656 | |
657 | void 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 | } | |
ece7f77b | 665 | EXPORT_SYMBOL(sound_close_dma); |
1da177e4 LT |
666 | |
667 | static void do_sequencer_timer(unsigned long dummy) | |
668 | { | |
669 | sequencer_timer(0); | |
670 | } | |
671 | ||
672 | ||
8d06afab | 673 | static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0); |
1da177e4 LT |
674 | |
675 | void 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 | ||
695 | void sound_stop_timer(void) | |
696 | { | |
697 | del_timer(&seq_timer); | |
698 | } | |
699 | ||
700 | void 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 | } | |
ece7f77b | 719 | EXPORT_SYMBOL(conf_printf); |
1da177e4 LT |
720 | |
721 | void 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 | } | |
ece7f77b AB |
740 | EXPORT_SYMBOL(conf_printf2); |
741 |