Commit | Line | Data |
---|---|---|
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> | |
b322f409 | 35 | #include <linux/kernel.h> |
1da177e4 LT |
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> | |
1da177e4 LT |
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> | |
f23f6e08 | 46 | #include <linux/mm.h> |
6473d160 | 47 | #include <linux/device.h> |
1da177e4 LT |
48 | |
49 | /* | |
50 | * This ought to be moved into include/asm/dma.h | |
51 | */ | |
52 | #ifndef valid_dma | |
53 | #define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4) | |
54 | #endif | |
55 | ||
56 | /* | |
57 | * Table for permanently allocated memory (used when unloading the module) | |
58 | */ | |
444c1953 | 59 | void * sound_mem_blocks[MAX_MEM_BLOCKS]; |
1da177e4 LT |
60 | int sound_nblocks = 0; |
61 | ||
62 | /* Persistent DMA buffers */ | |
63 | #ifdef CONFIG_SOUND_DMAP | |
64 | int sound_dmap_flag = 1; | |
65 | #else | |
66 | int sound_dmap_flag = 0; | |
67 | #endif | |
68 | ||
69 | static 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 | ||
76 | unsigned long seq_time = 0; /* Time for /dev/sequencer */ | |
619e666b | 77 | extern struct class *sound_class; |
1da177e4 LT |
78 | |
79 | /* | |
80 | * Table for configurable mixer volume handling | |
81 | */ | |
82 | static mixer_vol_table mixer_vols[MAX_MIXER_DEV]; | |
83 | static int num_mixer_volumes; | |
84 | ||
85 | int *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 | } | |
ece7f77b | 113 | EXPORT_SYMBOL(load_mixer_volumes); |
1da177e4 LT |
114 | |
115 | static int set_mixer_levels(void __user * arg) | |
116 | { | |
117 | /* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */ | |
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 | ||
128 | static 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 | /* 4K page size but our output routines use some slack for overruns */ | |
142 | #define PROC_BLOCK_SIZE (3*1024) | |
143 | ||
144 | static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
145 | { | |
7bc56323 | 146 | int dev = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
147 | int ret = -EINVAL; |
148 | ||
149 | /* | |
150 | * The OSS drivers aren't remotely happy without this locking, | |
151 | * and unless someone fixes them when they are about to bite the | |
152 | * big one anyway, we might as well bandage here.. | |
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 | ||
177 | static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
178 | { | |
7bc56323 | 179 | int dev = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
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 | ||
204 | static 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 | ||
253 | static 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 | ||
287 | static 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 | ||
299 | static 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 | ||
310 | static 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 | /* Try to load the mixer... */ | |
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 | ||
6b98515a | 331 | static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
332 | { |
333 | int len = 0, dtype; | |
6b98515a AC |
334 | int dev = iminor(file->f_dentry->d_inode); |
335 | long ret = -EINVAL; | |
1da177e4 LT |
336 | void __user *p = (void __user *)arg; |
337 | ||
338 | if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) { | |
339 | /* | |
340 | * Have to validate the address given by the process. | |
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 | ||
6b98515a | 356 | lock_kernel(); |
1da177e4 LT |
357 | if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 && /* Mixer ioctl */ |
358 | (dev & 0x0f) != SND_DEV_CTL) { | |
359 | dtype = dev & 0x0f; | |
360 | switch (dtype) { | |
361 | case SND_DEV_DSP: | |
362 | case SND_DEV_DSP16: | |
363 | case SND_DEV_AUDIO: | |
6b98515a | 364 | ret = sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev, |
1da177e4 | 365 | cmd, p); |
6b98515a | 366 | break; |
1da177e4 | 367 | default: |
6b98515a AC |
368 | ret = sound_mixer_ioctl(dev >> 4, cmd, p); |
369 | break; | |
1da177e4 | 370 | } |
6b98515a AC |
371 | unlock_kernel(); |
372 | return ret; | |
1da177e4 | 373 | } |
6b98515a | 374 | |
1da177e4 LT |
375 | switch (dev & 0x0f) { |
376 | case SND_DEV_CTL: | |
377 | if (cmd == SOUND_MIXER_GETLEVELS) | |
6b98515a AC |
378 | ret = get_mixer_levels(p); |
379 | else if (cmd == SOUND_MIXER_SETLEVELS) | |
380 | ret = set_mixer_levels(p); | |
381 | else | |
382 | ret = sound_mixer_ioctl(dev >> 4, cmd, p); | |
383 | break; | |
1da177e4 LT |
384 | |
385 | case SND_DEV_SEQ: | |
386 | case SND_DEV_SEQ2: | |
6b98515a AC |
387 | ret = sequencer_ioctl(dev, file, cmd, p); |
388 | break; | |
1da177e4 LT |
389 | |
390 | case SND_DEV_DSP: | |
391 | case SND_DEV_DSP16: | |
392 | case SND_DEV_AUDIO: | |
393 | return audio_ioctl(dev, file, cmd, p); | |
394 | break; | |
395 | ||
396 | case SND_DEV_MIDIN: | |
397 | return MIDIbuf_ioctl(dev, file, cmd, p); | |
398 | break; | |
399 | ||
400 | } | |
6b98515a AC |
401 | unlock_kernel(); |
402 | return ret; | |
1da177e4 LT |
403 | } |
404 | ||
405 | static unsigned int sound_poll(struct file *file, poll_table * wait) | |
406 | { | |
7bc56323 | 407 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
408 | int dev = iminor(inode); |
409 | ||
410 | DEB(printk("sound_poll(dev=%d)\n", dev)); | |
411 | switch (dev & 0x0f) { | |
412 | case SND_DEV_SEQ: | |
413 | case SND_DEV_SEQ2: | |
414 | return sequencer_poll(dev, file, wait); | |
415 | ||
416 | case SND_DEV_MIDIN: | |
417 | return MIDIbuf_poll(dev, file, wait); | |
418 | ||
419 | case SND_DEV_DSP: | |
420 | case SND_DEV_DSP16: | |
421 | case SND_DEV_AUDIO: | |
422 | return DMAbuf_poll(file, dev >> 4, wait); | |
423 | } | |
424 | return 0; | |
425 | } | |
426 | ||
427 | static int sound_mmap(struct file *file, struct vm_area_struct *vma) | |
428 | { | |
429 | int dev_class; | |
430 | unsigned long size; | |
431 | struct dma_buffparms *dmap = NULL; | |
7bc56323 | 432 | int dev = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
433 | |
434 | dev_class = dev & 0x0f; | |
435 | dev >>= 4; | |
436 | ||
437 | if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) { | |
438 | printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n"); | |
439 | return -EINVAL; | |
440 | } | |
441 | lock_kernel(); | |
442 | if (vma->vm_flags & VM_WRITE) /* Map write and read/write to the output buf */ | |
443 | dmap = audio_devs[dev]->dmap_out; | |
444 | else if (vma->vm_flags & VM_READ) | |
445 | dmap = audio_devs[dev]->dmap_in; | |
446 | else { | |
447 | printk(KERN_ERR "Sound: Undefined mmap() access\n"); | |
448 | unlock_kernel(); | |
449 | return -EINVAL; | |
450 | } | |
451 | ||
452 | if (dmap == NULL) { | |
453 | printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n"); | |
454 | unlock_kernel(); | |
455 | return -EIO; | |
456 | } | |
457 | if (dmap->raw_buf == NULL) { | |
458 | printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n"); | |
459 | unlock_kernel(); | |
460 | return -EIO; | |
461 | } | |
462 | if (dmap->mapping_flags) { | |
463 | printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n"); | |
464 | unlock_kernel(); | |
465 | return -EIO; | |
466 | } | |
467 | if (vma->vm_pgoff != 0) { | |
468 | printk(KERN_ERR "Sound: mmap() offset must be 0.\n"); | |
469 | unlock_kernel(); | |
470 | return -EINVAL; | |
471 | } | |
472 | size = vma->vm_end - vma->vm_start; | |
473 | ||
474 | if (size != dmap->bytes_in_use) { | |
475 | printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use); | |
476 | } | |
477 | if (remap_pfn_range(vma, vma->vm_start, | |
478 | virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT, | |
479 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) { | |
480 | unlock_kernel(); | |
481 | return -EAGAIN; | |
482 | } | |
483 | ||
484 | dmap->mapping_flags |= DMA_MAP_MAPPED; | |
485 | ||
486 | if( audio_devs[dev]->d->mmap) | |
487 | audio_devs[dev]->d->mmap(dev); | |
488 | ||
489 | memset(dmap->raw_buf, | |
490 | dmap->neutral_byte, | |
491 | dmap->bytes_in_use); | |
492 | unlock_kernel(); | |
493 | return 0; | |
494 | } | |
495 | ||
9c2e08c5 | 496 | const struct file_operations oss_sound_fops = { |
1da177e4 LT |
497 | .owner = THIS_MODULE, |
498 | .llseek = no_llseek, | |
499 | .read = sound_read, | |
500 | .write = sound_write, | |
501 | .poll = sound_poll, | |
6b98515a | 502 | .unlocked_ioctl = sound_ioctl, |
1da177e4 LT |
503 | .mmap = sound_mmap, |
504 | .open = sound_open, | |
505 | .release = sound_release, | |
506 | }; | |
507 | ||
508 | /* | |
509 | * Create the required special subdevices | |
510 | */ | |
511 | ||
512 | static int create_special_devices(void) | |
513 | { | |
514 | int seq1,seq2; | |
515 | seq1=register_sound_special(&oss_sound_fops, 1); | |
516 | if(seq1==-1) | |
517 | goto bad; | |
518 | seq2=register_sound_special(&oss_sound_fops, 8); | |
519 | if(seq2!=-1) | |
520 | return 0; | |
521 | unregister_sound_special(1); | |
522 | bad: | |
523 | return -1; | |
524 | } | |
525 | ||
526 | ||
527 | /* These device names follow the official Linux device list, | |
528 | * Documentation/devices.txt. Let us know if there are other | |
529 | * common names we should support for compatibility. | |
530 | * Only those devices not created by the generic code in sound_core.c are | |
531 | * registered here. | |
532 | */ | |
533 | static const struct { | |
534 | unsigned short minor; | |
535 | char *name; | |
536 | umode_t mode; | |
537 | int *num; | |
538 | } dev_list[] = { /* list of minor devices */ | |
539 | /* seems to be some confusion here -- this device is not in the device list */ | |
540 | {SND_DEV_DSP16, "dspW", S_IWUGO | S_IRUSR | S_IRGRP, | |
541 | &num_audiodevs}, | |
542 | {SND_DEV_AUDIO, "audio", S_IWUGO | S_IRUSR | S_IRGRP, | |
543 | &num_audiodevs}, | |
544 | }; | |
545 | ||
546 | static int dmabuf; | |
547 | static int dmabug; | |
548 | ||
549 | module_param(dmabuf, int, 0444); | |
550 | module_param(dmabug, int, 0444); | |
551 | ||
552 | static int __init oss_init(void) | |
553 | { | |
554 | int err; | |
555 | int i, j; | |
556 | ||
1da177e4 LT |
557 | #ifdef CONFIG_PCI |
558 | if(dmabug) | |
559 | isa_dma_bridge_buggy = dmabug; | |
560 | #endif | |
561 | ||
562 | err = create_special_devices(); | |
563 | if (err) { | |
564 | printk(KERN_ERR "sound: driver already loaded/included in kernel\n"); | |
565 | return err; | |
566 | } | |
567 | ||
568 | /* Protecting the innocent */ | |
569 | sound_dmap_flag = (dmabuf > 0 ? 1 : 0); | |
570 | ||
b322f409 | 571 | for (i = 0; i < ARRAY_SIZE(dev_list); i++) { |
abe9ab8f GKH |
572 | device_create(sound_class, NULL, |
573 | MKDEV(SOUND_MAJOR, dev_list[i].minor), NULL, | |
574 | "%s", dev_list[i].name); | |
1da177e4 LT |
575 | |
576 | if (!dev_list[i].num) | |
577 | continue; | |
578 | ||
0936f26f | 579 | for (j = 1; j < *dev_list[i].num; j++) |
abe9ab8f GKH |
580 | device_create(sound_class, NULL, |
581 | MKDEV(SOUND_MAJOR, | |
582 | dev_list[i].minor + (j*0x10)), | |
583 | NULL, "%s%d", dev_list[i].name, j); | |
1da177e4 LT |
584 | } |
585 | ||
444c1953 | 586 | if (sound_nblocks >= MAX_MEM_BLOCKS - 1) |
1da177e4 LT |
587 | printk(KERN_ERR "Sound warning: Deallocation table was too small.\n"); |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | static void __exit oss_cleanup(void) | |
593 | { | |
594 | int i, j; | |
595 | ||
b322f409 | 596 | for (i = 0; i < ARRAY_SIZE(dev_list); i++) { |
d80f19fa | 597 | device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor)); |
1da177e4 LT |
598 | if (!dev_list[i].num) |
599 | continue; | |
0936f26f | 600 | for (j = 1; j < *dev_list[i].num; j++) |
d80f19fa | 601 | device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10))); |
1da177e4 LT |
602 | } |
603 | ||
604 | unregister_sound_special(1); | |
605 | unregister_sound_special(8); | |
606 | ||
607 | sound_stop_timer(); | |
608 | ||
609 | sequencer_unload(); | |
610 | ||
611 | for (i = 0; i < MAX_DMA_CHANNELS; i++) | |
612 | if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) { | |
613 | printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i); | |
614 | sound_free_dma(i); | |
615 | } | |
616 | ||
617 | for (i = 0; i < sound_nblocks; i++) | |
618 | vfree(sound_mem_blocks[i]); | |
619 | ||
620 | } | |
621 | ||
622 | module_init(oss_init); | |
623 | module_exit(oss_cleanup); | |
624 | MODULE_LICENSE("GPL"); | |
ece7f77b AB |
625 | MODULE_DESCRIPTION("OSS Sound subsystem"); |
626 | MODULE_AUTHOR("Hannu Savolainen, et al."); | |
1da177e4 LT |
627 | |
628 | ||
629 | int sound_alloc_dma(int chn, char *deviceID) | |
630 | { | |
631 | int err; | |
632 | ||
633 | if ((err = request_dma(chn, deviceID)) != 0) | |
634 | return err; | |
635 | ||
636 | dma_alloc_map[chn] = DMA_MAP_FREE; | |
637 | ||
638 | return 0; | |
639 | } | |
ece7f77b | 640 | EXPORT_SYMBOL(sound_alloc_dma); |
1da177e4 LT |
641 | |
642 | int sound_open_dma(int chn, char *deviceID) | |
643 | { | |
644 | if (!valid_dma(chn)) { | |
645 | printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn); | |
646 | return 1; | |
647 | } | |
648 | ||
649 | if (dma_alloc_map[chn] != DMA_MAP_FREE) { | |
650 | printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]); | |
651 | return 1; | |
652 | } | |
653 | dma_alloc_map[chn] = DMA_MAP_BUSY; | |
654 | return 0; | |
655 | } | |
ece7f77b | 656 | EXPORT_SYMBOL(sound_open_dma); |
1da177e4 LT |
657 | |
658 | void sound_free_dma(int chn) | |
659 | { | |
660 | if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) { | |
661 | /* printk( "sound_free_dma: Bad access to DMA channel %d\n", chn); */ | |
662 | return; | |
663 | } | |
664 | free_dma(chn); | |
665 | dma_alloc_map[chn] = DMA_MAP_UNAVAIL; | |
666 | } | |
ece7f77b | 667 | EXPORT_SYMBOL(sound_free_dma); |
1da177e4 LT |
668 | |
669 | void sound_close_dma(int chn) | |
670 | { | |
671 | if (dma_alloc_map[chn] != DMA_MAP_BUSY) { | |
672 | printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn); | |
673 | return; | |
674 | } | |
675 | dma_alloc_map[chn] = DMA_MAP_FREE; | |
676 | } | |
ece7f77b | 677 | EXPORT_SYMBOL(sound_close_dma); |
1da177e4 LT |
678 | |
679 | static void do_sequencer_timer(unsigned long dummy) | |
680 | { | |
681 | sequencer_timer(0); | |
682 | } | |
683 | ||
684 | ||
8d06afab | 685 | static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0); |
1da177e4 LT |
686 | |
687 | void request_sound_timer(int count) | |
688 | { | |
689 | extern unsigned long seq_time; | |
690 | ||
691 | if (count < 0) { | |
692 | seq_timer.expires = (-count) + jiffies; | |
693 | add_timer(&seq_timer); | |
694 | return; | |
695 | } | |
696 | count += seq_time; | |
697 | ||
698 | count -= jiffies; | |
699 | ||
700 | if (count < 1) | |
701 | count = 1; | |
702 | ||
703 | seq_timer.expires = (count) + jiffies; | |
704 | add_timer(&seq_timer); | |
705 | } | |
706 | ||
707 | void sound_stop_timer(void) | |
708 | { | |
709 | del_timer(&seq_timer); | |
710 | } | |
711 | ||
712 | void conf_printf(char *name, struct address_info *hw_config) | |
713 | { | |
714 | #ifndef CONFIG_SOUND_TRACEINIT | |
715 | return; | |
716 | #else | |
717 | printk("<%s> at 0x%03x", name, hw_config->io_base); | |
718 | ||
719 | if (hw_config->irq) | |
720 | printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq); | |
721 | ||
722 | if (hw_config->dma != -1 || hw_config->dma2 != -1) | |
723 | { | |
724 | printk(" dma %d", hw_config->dma); | |
725 | if (hw_config->dma2 != -1) | |
726 | printk(",%d", hw_config->dma2); | |
727 | } | |
728 | printk("\n"); | |
729 | #endif | |
730 | } | |
ece7f77b | 731 | EXPORT_SYMBOL(conf_printf); |
1da177e4 LT |
732 | |
733 | void conf_printf2(char *name, int base, int irq, int dma, int dma2) | |
734 | { | |
735 | #ifndef CONFIG_SOUND_TRACEINIT | |
736 | return; | |
737 | #else | |
738 | printk("<%s> at 0x%03x", name, base); | |
739 | ||
740 | if (irq) | |
741 | printk(" irq %d", (irq > 0) ? irq : -irq); | |
742 | ||
743 | if (dma != -1 || dma2 != -1) | |
744 | { | |
745 | printk(" dma %d", dma); | |
746 | if (dma2 != -1) | |
747 | printk(",%d", dma2); | |
748 | } | |
749 | printk("\n"); | |
750 | #endif | |
751 | } | |
ece7f77b AB |
752 | EXPORT_SYMBOL(conf_printf2); |
753 |