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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> | |
45 | ||
46 | /* | |
47 | * This ought to be moved into include/asm/dma.h | |
48 | */ | |
49 | #ifndef valid_dma | |
50 | #define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4) | |
51 | #endif | |
52 | ||
53 | /* | |
54 | * Table for permanently allocated memory (used when unloading the module) | |
55 | */ | |
56 | void * sound_mem_blocks[1024]; | |
57 | int sound_nblocks = 0; | |
58 | ||
59 | /* Persistent DMA buffers */ | |
60 | #ifdef CONFIG_SOUND_DMAP | |
61 | int sound_dmap_flag = 1; | |
62 | #else | |
63 | int sound_dmap_flag = 0; | |
64 | #endif | |
65 | ||
66 | static char dma_alloc_map[MAX_DMA_CHANNELS]; | |
67 | ||
68 | #define DMA_MAP_UNAVAIL 0 | |
69 | #define DMA_MAP_FREE 1 | |
70 | #define DMA_MAP_BUSY 2 | |
71 | ||
72 | ||
73 | unsigned long seq_time = 0; /* Time for /dev/sequencer */ | |
619e666b | 74 | extern struct class *sound_class; |
1da177e4 LT |
75 | |
76 | /* | |
77 | * Table for configurable mixer volume handling | |
78 | */ | |
79 | static mixer_vol_table mixer_vols[MAX_MIXER_DEV]; | |
80 | static int num_mixer_volumes; | |
81 | ||
82 | int *load_mixer_volumes(char *name, int *levels, int present) | |
83 | { | |
84 | int i, n; | |
85 | ||
86 | for (i = 0; i < num_mixer_volumes; i++) { | |
87 | if (strcmp(name, mixer_vols[i].name) == 0) { | |
88 | if (present) | |
89 | mixer_vols[i].num = i; | |
90 | return mixer_vols[i].levels; | |
91 | } | |
92 | } | |
93 | if (num_mixer_volumes >= MAX_MIXER_DEV) { | |
94 | printk(KERN_ERR "Sound: Too many mixers (%s)\n", name); | |
95 | return levels; | |
96 | } | |
97 | n = num_mixer_volumes++; | |
98 | ||
99 | strcpy(mixer_vols[n].name, name); | |
100 | ||
101 | if (present) | |
102 | mixer_vols[n].num = n; | |
103 | else | |
104 | mixer_vols[n].num = -1; | |
105 | ||
106 | for (i = 0; i < 32; i++) | |
107 | mixer_vols[n].levels[i] = levels[i]; | |
108 | return mixer_vols[n].levels; | |
109 | } | |
ece7f77b | 110 | EXPORT_SYMBOL(load_mixer_volumes); |
1da177e4 LT |
111 | |
112 | static int set_mixer_levels(void __user * arg) | |
113 | { | |
114 | /* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */ | |
115 | mixer_vol_table buf; | |
116 | ||
117 | if (__copy_from_user(&buf, arg, sizeof(buf))) | |
118 | return -EFAULT; | |
119 | load_mixer_volumes(buf.name, buf.levels, 0); | |
120 | if (__copy_to_user(arg, &buf, sizeof(buf))) | |
121 | return -EFAULT; | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static int get_mixer_levels(void __user * arg) | |
126 | { | |
127 | int n; | |
128 | ||
129 | if (__get_user(n, (int __user *)(&(((mixer_vol_table __user *)arg)->num)))) | |
130 | return -EFAULT; | |
131 | if (n < 0 || n >= num_mixer_volumes) | |
132 | return -EINVAL; | |
133 | if (__copy_to_user(arg, &mixer_vols[n], sizeof(mixer_vol_table))) | |
134 | return -EFAULT; | |
135 | return 0; | |
136 | } | |
137 | ||
138 | /* 4K page size but our output routines use some slack for overruns */ | |
139 | #define PROC_BLOCK_SIZE (3*1024) | |
140 | ||
141 | static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
142 | { | |
143 | int dev = iminor(file->f_dentry->d_inode); | |
144 | int ret = -EINVAL; | |
145 | ||
146 | /* | |
147 | * The OSS drivers aren't remotely happy without this locking, | |
148 | * and unless someone fixes them when they are about to bite the | |
149 | * big one anyway, we might as well bandage here.. | |
150 | */ | |
151 | ||
152 | lock_kernel(); | |
153 | ||
154 | DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count)); | |
155 | switch (dev & 0x0f) { | |
156 | case SND_DEV_DSP: | |
157 | case SND_DEV_DSP16: | |
158 | case SND_DEV_AUDIO: | |
159 | ret = audio_read(dev, file, buf, count); | |
160 | break; | |
161 | ||
162 | case SND_DEV_SEQ: | |
163 | case SND_DEV_SEQ2: | |
164 | ret = sequencer_read(dev, file, buf, count); | |
165 | break; | |
166 | ||
167 | case SND_DEV_MIDIN: | |
168 | ret = MIDIbuf_read(dev, file, buf, count); | |
169 | } | |
170 | unlock_kernel(); | |
171 | return ret; | |
172 | } | |
173 | ||
174 | static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
175 | { | |
176 | int dev = iminor(file->f_dentry->d_inode); | |
177 | int ret = -EINVAL; | |
178 | ||
179 | lock_kernel(); | |
180 | DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count)); | |
181 | switch (dev & 0x0f) { | |
182 | case SND_DEV_SEQ: | |
183 | case SND_DEV_SEQ2: | |
184 | ret = sequencer_write(dev, file, buf, count); | |
185 | break; | |
186 | ||
187 | case SND_DEV_DSP: | |
188 | case SND_DEV_DSP16: | |
189 | case SND_DEV_AUDIO: | |
190 | ret = audio_write(dev, file, buf, count); | |
191 | break; | |
192 | ||
193 | case SND_DEV_MIDIN: | |
194 | ret = MIDIbuf_write(dev, file, buf, count); | |
195 | break; | |
196 | } | |
197 | unlock_kernel(); | |
198 | return ret; | |
199 | } | |
200 | ||
201 | static int sound_open(struct inode *inode, struct file *file) | |
202 | { | |
203 | int dev = iminor(inode); | |
204 | int retval; | |
205 | ||
206 | DEB(printk("sound_open(dev=%d)\n", dev)); | |
207 | if ((dev >= SND_NDEVS) || (dev < 0)) { | |
208 | printk(KERN_ERR "Invalid minor device %d\n", dev); | |
209 | return -ENXIO; | |
210 | } | |
211 | switch (dev & 0x0f) { | |
212 | case SND_DEV_CTL: | |
213 | dev >>= 4; | |
214 | if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) { | |
215 | request_module("mixer%d", dev); | |
216 | } | |
217 | if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL)) | |
218 | return -ENXIO; | |
219 | ||
220 | if (!try_module_get(mixer_devs[dev]->owner)) | |
221 | return -ENXIO; | |
222 | break; | |
223 | ||
224 | case SND_DEV_SEQ: | |
225 | case SND_DEV_SEQ2: | |
226 | if ((retval = sequencer_open(dev, file)) < 0) | |
227 | return retval; | |
228 | break; | |
229 | ||
230 | case SND_DEV_MIDIN: | |
231 | if ((retval = MIDIbuf_open(dev, file)) < 0) | |
232 | return retval; | |
233 | break; | |
234 | ||
235 | case SND_DEV_DSP: | |
236 | case SND_DEV_DSP16: | |
237 | case SND_DEV_AUDIO: | |
238 | if ((retval = audio_open(dev, file)) < 0) | |
239 | return retval; | |
240 | break; | |
241 | ||
242 | default: | |
243 | printk(KERN_ERR "Invalid minor device %d\n", dev); | |
244 | return -ENXIO; | |
245 | } | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | static int sound_release(struct inode *inode, struct file *file) | |
251 | { | |
252 | int dev = iminor(inode); | |
253 | ||
254 | lock_kernel(); | |
255 | DEB(printk("sound_release(dev=%d)\n", dev)); | |
256 | switch (dev & 0x0f) { | |
257 | case SND_DEV_CTL: | |
258 | module_put(mixer_devs[dev >> 4]->owner); | |
259 | break; | |
260 | ||
261 | case SND_DEV_SEQ: | |
262 | case SND_DEV_SEQ2: | |
263 | sequencer_release(dev, file); | |
264 | break; | |
265 | ||
266 | case SND_DEV_MIDIN: | |
267 | MIDIbuf_release(dev, file); | |
268 | break; | |
269 | ||
270 | case SND_DEV_DSP: | |
271 | case SND_DEV_DSP16: | |
272 | case SND_DEV_AUDIO: | |
273 | audio_release(dev, file); | |
274 | break; | |
275 | ||
276 | default: | |
277 | printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev); | |
278 | } | |
279 | unlock_kernel(); | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | static int get_mixer_info(int dev, void __user *arg) | |
285 | { | |
286 | mixer_info info; | |
287 | memset(&info, 0, sizeof(info)); | |
288 | strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id)); | |
289 | strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name)); | |
290 | info.modify_counter = mixer_devs[dev]->modify_counter; | |
291 | if (__copy_to_user(arg, &info, sizeof(info))) | |
292 | return -EFAULT; | |
293 | return 0; | |
294 | } | |
295 | ||
296 | static int get_old_mixer_info(int dev, void __user *arg) | |
297 | { | |
298 | _old_mixer_info info; | |
299 | memset(&info, 0, sizeof(info)); | |
300 | strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id)); | |
301 | strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name)); | |
302 | if (copy_to_user(arg, &info, sizeof(info))) | |
303 | return -EFAULT; | |
304 | return 0; | |
305 | } | |
306 | ||
307 | static int sound_mixer_ioctl(int mixdev, unsigned int cmd, void __user *arg) | |
308 | { | |
309 | if (mixdev < 0 || mixdev >= MAX_MIXER_DEV) | |
310 | return -ENXIO; | |
311 | /* Try to load the mixer... */ | |
312 | if (mixer_devs[mixdev] == NULL) { | |
313 | request_module("mixer%d", mixdev); | |
314 | } | |
315 | if (mixdev >= num_mixers || !mixer_devs[mixdev]) | |
316 | return -ENXIO; | |
317 | if (cmd == SOUND_MIXER_INFO) | |
318 | return get_mixer_info(mixdev, arg); | |
319 | if (cmd == SOUND_OLD_MIXER_INFO) | |
320 | return get_old_mixer_info(mixdev, arg); | |
321 | if (_SIOC_DIR(cmd) & _SIOC_WRITE) | |
322 | mixer_devs[mixdev]->modify_counter++; | |
323 | if (!mixer_devs[mixdev]->ioctl) | |
324 | return -EINVAL; | |
325 | return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg); | |
326 | } | |
327 | ||
328 | static int sound_ioctl(struct inode *inode, struct file *file, | |
329 | unsigned int cmd, unsigned long arg) | |
330 | { | |
331 | int len = 0, dtype; | |
332 | int dev = iminor(inode); | |
333 | void __user *p = (void __user *)arg; | |
334 | ||
335 | if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) { | |
336 | /* | |
337 | * Have to validate the address given by the process. | |
338 | */ | |
339 | len = _SIOC_SIZE(cmd); | |
340 | if (len < 1 || len > 65536 || !p) | |
341 | return -EFAULT; | |
342 | if (_SIOC_DIR(cmd) & _SIOC_WRITE) | |
343 | if (!access_ok(VERIFY_READ, p, len)) | |
344 | return -EFAULT; | |
345 | if (_SIOC_DIR(cmd) & _SIOC_READ) | |
346 | if (!access_ok(VERIFY_WRITE, p, len)) | |
347 | return -EFAULT; | |
348 | } | |
349 | DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg)); | |
350 | if (cmd == OSS_GETVERSION) | |
351 | return __put_user(SOUND_VERSION, (int __user *)p); | |
352 | ||
353 | if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 && /* Mixer ioctl */ | |
354 | (dev & 0x0f) != SND_DEV_CTL) { | |
355 | dtype = dev & 0x0f; | |
356 | switch (dtype) { | |
357 | case SND_DEV_DSP: | |
358 | case SND_DEV_DSP16: | |
359 | case SND_DEV_AUDIO: | |
360 | return sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev, | |
361 | cmd, p); | |
362 | ||
363 | default: | |
364 | return sound_mixer_ioctl(dev >> 4, cmd, p); | |
365 | } | |
366 | } | |
367 | switch (dev & 0x0f) { | |
368 | case SND_DEV_CTL: | |
369 | if (cmd == SOUND_MIXER_GETLEVELS) | |
370 | return get_mixer_levels(p); | |
371 | if (cmd == SOUND_MIXER_SETLEVELS) | |
372 | return set_mixer_levels(p); | |
373 | return sound_mixer_ioctl(dev >> 4, cmd, p); | |
374 | ||
375 | case SND_DEV_SEQ: | |
376 | case SND_DEV_SEQ2: | |
377 | return sequencer_ioctl(dev, file, cmd, p); | |
378 | ||
379 | case SND_DEV_DSP: | |
380 | case SND_DEV_DSP16: | |
381 | case SND_DEV_AUDIO: | |
382 | return audio_ioctl(dev, file, cmd, p); | |
383 | break; | |
384 | ||
385 | case SND_DEV_MIDIN: | |
386 | return MIDIbuf_ioctl(dev, file, cmd, p); | |
387 | break; | |
388 | ||
389 | } | |
390 | return -EINVAL; | |
391 | } | |
392 | ||
393 | static unsigned int sound_poll(struct file *file, poll_table * wait) | |
394 | { | |
395 | struct inode *inode = file->f_dentry->d_inode; | |
396 | int dev = iminor(inode); | |
397 | ||
398 | DEB(printk("sound_poll(dev=%d)\n", dev)); | |
399 | switch (dev & 0x0f) { | |
400 | case SND_DEV_SEQ: | |
401 | case SND_DEV_SEQ2: | |
402 | return sequencer_poll(dev, file, wait); | |
403 | ||
404 | case SND_DEV_MIDIN: | |
405 | return MIDIbuf_poll(dev, file, wait); | |
406 | ||
407 | case SND_DEV_DSP: | |
408 | case SND_DEV_DSP16: | |
409 | case SND_DEV_AUDIO: | |
410 | return DMAbuf_poll(file, dev >> 4, wait); | |
411 | } | |
412 | return 0; | |
413 | } | |
414 | ||
415 | static int sound_mmap(struct file *file, struct vm_area_struct *vma) | |
416 | { | |
417 | int dev_class; | |
418 | unsigned long size; | |
419 | struct dma_buffparms *dmap = NULL; | |
420 | int dev = iminor(file->f_dentry->d_inode); | |
421 | ||
422 | dev_class = dev & 0x0f; | |
423 | dev >>= 4; | |
424 | ||
425 | if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) { | |
426 | printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n"); | |
427 | return -EINVAL; | |
428 | } | |
429 | lock_kernel(); | |
430 | if (vma->vm_flags & VM_WRITE) /* Map write and read/write to the output buf */ | |
431 | dmap = audio_devs[dev]->dmap_out; | |
432 | else if (vma->vm_flags & VM_READ) | |
433 | dmap = audio_devs[dev]->dmap_in; | |
434 | else { | |
435 | printk(KERN_ERR "Sound: Undefined mmap() access\n"); | |
436 | unlock_kernel(); | |
437 | return -EINVAL; | |
438 | } | |
439 | ||
440 | if (dmap == NULL) { | |
441 | printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n"); | |
442 | unlock_kernel(); | |
443 | return -EIO; | |
444 | } | |
445 | if (dmap->raw_buf == NULL) { | |
446 | printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n"); | |
447 | unlock_kernel(); | |
448 | return -EIO; | |
449 | } | |
450 | if (dmap->mapping_flags) { | |
451 | printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n"); | |
452 | unlock_kernel(); | |
453 | return -EIO; | |
454 | } | |
455 | if (vma->vm_pgoff != 0) { | |
456 | printk(KERN_ERR "Sound: mmap() offset must be 0.\n"); | |
457 | unlock_kernel(); | |
458 | return -EINVAL; | |
459 | } | |
460 | size = vma->vm_end - vma->vm_start; | |
461 | ||
462 | if (size != dmap->bytes_in_use) { | |
463 | printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use); | |
464 | } | |
465 | if (remap_pfn_range(vma, vma->vm_start, | |
466 | virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT, | |
467 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) { | |
468 | unlock_kernel(); | |
469 | return -EAGAIN; | |
470 | } | |
471 | ||
472 | dmap->mapping_flags |= DMA_MAP_MAPPED; | |
473 | ||
474 | if( audio_devs[dev]->d->mmap) | |
475 | audio_devs[dev]->d->mmap(dev); | |
476 | ||
477 | memset(dmap->raw_buf, | |
478 | dmap->neutral_byte, | |
479 | dmap->bytes_in_use); | |
480 | unlock_kernel(); | |
481 | return 0; | |
482 | } | |
483 | ||
484 | struct file_operations oss_sound_fops = { | |
485 | .owner = THIS_MODULE, | |
486 | .llseek = no_llseek, | |
487 | .read = sound_read, | |
488 | .write = sound_write, | |
489 | .poll = sound_poll, | |
490 | .ioctl = sound_ioctl, | |
491 | .mmap = sound_mmap, | |
492 | .open = sound_open, | |
493 | .release = sound_release, | |
494 | }; | |
495 | ||
496 | /* | |
497 | * Create the required special subdevices | |
498 | */ | |
499 | ||
500 | static int create_special_devices(void) | |
501 | { | |
502 | int seq1,seq2; | |
503 | seq1=register_sound_special(&oss_sound_fops, 1); | |
504 | if(seq1==-1) | |
505 | goto bad; | |
506 | seq2=register_sound_special(&oss_sound_fops, 8); | |
507 | if(seq2!=-1) | |
508 | return 0; | |
509 | unregister_sound_special(1); | |
510 | bad: | |
511 | return -1; | |
512 | } | |
513 | ||
514 | ||
515 | /* These device names follow the official Linux device list, | |
516 | * Documentation/devices.txt. Let us know if there are other | |
517 | * common names we should support for compatibility. | |
518 | * Only those devices not created by the generic code in sound_core.c are | |
519 | * registered here. | |
520 | */ | |
521 | static const struct { | |
522 | unsigned short minor; | |
523 | char *name; | |
524 | umode_t mode; | |
525 | int *num; | |
526 | } dev_list[] = { /* list of minor devices */ | |
527 | /* seems to be some confusion here -- this device is not in the device list */ | |
528 | {SND_DEV_DSP16, "dspW", S_IWUGO | S_IRUSR | S_IRGRP, | |
529 | &num_audiodevs}, | |
530 | {SND_DEV_AUDIO, "audio", S_IWUGO | S_IRUSR | S_IRGRP, | |
531 | &num_audiodevs}, | |
532 | }; | |
533 | ||
534 | static int dmabuf; | |
535 | static int dmabug; | |
536 | ||
537 | module_param(dmabuf, int, 0444); | |
538 | module_param(dmabug, int, 0444); | |
539 | ||
540 | static int __init oss_init(void) | |
541 | { | |
542 | int err; | |
543 | int i, j; | |
544 | ||
1da177e4 LT |
545 | #ifdef CONFIG_PCI |
546 | if(dmabug) | |
547 | isa_dma_bridge_buggy = dmabug; | |
548 | #endif | |
549 | ||
550 | err = create_special_devices(); | |
551 | if (err) { | |
552 | printk(KERN_ERR "sound: driver already loaded/included in kernel\n"); | |
553 | return err; | |
554 | } | |
555 | ||
556 | /* Protecting the innocent */ | |
557 | sound_dmap_flag = (dmabuf > 0 ? 1 : 0); | |
558 | ||
559 | for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) { | |
53f46542 | 560 | class_device_create(sound_class, NULL, |
619e666b GKH |
561 | MKDEV(SOUND_MAJOR, dev_list[i].minor), |
562 | NULL, "%s", dev_list[i].name); | |
1da177e4 LT |
563 | |
564 | if (!dev_list[i].num) | |
565 | continue; | |
566 | ||
0936f26f | 567 | for (j = 1; j < *dev_list[i].num; j++) |
53f46542 | 568 | class_device_create(sound_class, NULL, |
619e666b GKH |
569 | MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)), |
570 | NULL, "%s%d", dev_list[i].name, j); | |
1da177e4 LT |
571 | } |
572 | ||
573 | if (sound_nblocks >= 1024) | |
574 | printk(KERN_ERR "Sound warning: Deallocation table was too small.\n"); | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
579 | static void __exit oss_cleanup(void) | |
580 | { | |
581 | int i, j; | |
582 | ||
583 | for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) { | |
619e666b | 584 | class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor)); |
1da177e4 LT |
585 | if (!dev_list[i].num) |
586 | continue; | |
0936f26f | 587 | for (j = 1; j < *dev_list[i].num; j++) |
619e666b | 588 | class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10))); |
1da177e4 LT |
589 | } |
590 | ||
591 | unregister_sound_special(1); | |
592 | unregister_sound_special(8); | |
593 | ||
594 | sound_stop_timer(); | |
595 | ||
596 | sequencer_unload(); | |
597 | ||
598 | for (i = 0; i < MAX_DMA_CHANNELS; i++) | |
599 | if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) { | |
600 | printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i); | |
601 | sound_free_dma(i); | |
602 | } | |
603 | ||
604 | for (i = 0; i < sound_nblocks; i++) | |
605 | vfree(sound_mem_blocks[i]); | |
606 | ||
607 | } | |
608 | ||
609 | module_init(oss_init); | |
610 | module_exit(oss_cleanup); | |
611 | MODULE_LICENSE("GPL"); | |
ece7f77b AB |
612 | MODULE_DESCRIPTION("OSS Sound subsystem"); |
613 | MODULE_AUTHOR("Hannu Savolainen, et al."); | |
1da177e4 LT |
614 | |
615 | ||
616 | int sound_alloc_dma(int chn, char *deviceID) | |
617 | { | |
618 | int err; | |
619 | ||
620 | if ((err = request_dma(chn, deviceID)) != 0) | |
621 | return err; | |
622 | ||
623 | dma_alloc_map[chn] = DMA_MAP_FREE; | |
624 | ||
625 | return 0; | |
626 | } | |
ece7f77b | 627 | EXPORT_SYMBOL(sound_alloc_dma); |
1da177e4 LT |
628 | |
629 | int sound_open_dma(int chn, char *deviceID) | |
630 | { | |
631 | if (!valid_dma(chn)) { | |
632 | printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn); | |
633 | return 1; | |
634 | } | |
635 | ||
636 | if (dma_alloc_map[chn] != DMA_MAP_FREE) { | |
637 | printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]); | |
638 | return 1; | |
639 | } | |
640 | dma_alloc_map[chn] = DMA_MAP_BUSY; | |
641 | return 0; | |
642 | } | |
ece7f77b | 643 | EXPORT_SYMBOL(sound_open_dma); |
1da177e4 LT |
644 | |
645 | void sound_free_dma(int chn) | |
646 | { | |
647 | if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) { | |
648 | /* printk( "sound_free_dma: Bad access to DMA channel %d\n", chn); */ | |
649 | return; | |
650 | } | |
651 | free_dma(chn); | |
652 | dma_alloc_map[chn] = DMA_MAP_UNAVAIL; | |
653 | } | |
ece7f77b | 654 | EXPORT_SYMBOL(sound_free_dma); |
1da177e4 LT |
655 | |
656 | void sound_close_dma(int chn) | |
657 | { | |
658 | if (dma_alloc_map[chn] != DMA_MAP_BUSY) { | |
659 | printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn); | |
660 | return; | |
661 | } | |
662 | dma_alloc_map[chn] = DMA_MAP_FREE; | |
663 | } | |
ece7f77b | 664 | EXPORT_SYMBOL(sound_close_dma); |
1da177e4 LT |
665 | |
666 | static void do_sequencer_timer(unsigned long dummy) | |
667 | { | |
668 | sequencer_timer(0); | |
669 | } | |
670 | ||
671 | ||
8d06afab | 672 | static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0); |
1da177e4 LT |
673 | |
674 | void request_sound_timer(int count) | |
675 | { | |
676 | extern unsigned long seq_time; | |
677 | ||
678 | if (count < 0) { | |
679 | seq_timer.expires = (-count) + jiffies; | |
680 | add_timer(&seq_timer); | |
681 | return; | |
682 | } | |
683 | count += seq_time; | |
684 | ||
685 | count -= jiffies; | |
686 | ||
687 | if (count < 1) | |
688 | count = 1; | |
689 | ||
690 | seq_timer.expires = (count) + jiffies; | |
691 | add_timer(&seq_timer); | |
692 | } | |
693 | ||
694 | void sound_stop_timer(void) | |
695 | { | |
696 | del_timer(&seq_timer); | |
697 | } | |
698 | ||
699 | void conf_printf(char *name, struct address_info *hw_config) | |
700 | { | |
701 | #ifndef CONFIG_SOUND_TRACEINIT | |
702 | return; | |
703 | #else | |
704 | printk("<%s> at 0x%03x", name, hw_config->io_base); | |
705 | ||
706 | if (hw_config->irq) | |
707 | printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq); | |
708 | ||
709 | if (hw_config->dma != -1 || hw_config->dma2 != -1) | |
710 | { | |
711 | printk(" dma %d", hw_config->dma); | |
712 | if (hw_config->dma2 != -1) | |
713 | printk(",%d", hw_config->dma2); | |
714 | } | |
715 | printk("\n"); | |
716 | #endif | |
717 | } | |
ece7f77b | 718 | EXPORT_SYMBOL(conf_printf); |
1da177e4 LT |
719 | |
720 | void conf_printf2(char *name, int base, int irq, int dma, int dma2) | |
721 | { | |
722 | #ifndef CONFIG_SOUND_TRACEINIT | |
723 | return; | |
724 | #else | |
725 | printk("<%s> at 0x%03x", name, base); | |
726 | ||
727 | if (irq) | |
728 | printk(" irq %d", (irq > 0) ? irq : -irq); | |
729 | ||
730 | if (dma != -1 || dma2 != -1) | |
731 | { | |
732 | printk(" dma %d", dma); | |
733 | if (dma2 != -1) | |
734 | printk(",%d", dma2); | |
735 | } | |
736 | printk("\n"); | |
737 | #endif | |
738 | } | |
ece7f77b AB |
739 | EXPORT_SYMBOL(conf_printf2); |
740 |