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1 | /* |
2 | * linux/sound/oss/soundcard.c |
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 | |
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 <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 | * This ought to be moved into include/asm/dma.h |
50 | */ |
51 | #ifndef valid_dma |
52 | #define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4) |
53 | #endif |
54 | |
55 | /* |
56 | * Table for permanently allocated memory (used when unloading the module) |
57 | */ |
58 | void * sound_mem_blocks[MAX_MEM_BLOCKS]; |
59 | static DEFINE_MUTEX(soundcard_mutex); |
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 */ |
77 | extern struct class *sound_class; |
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 (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 | } |
113 | EXPORT_SYMBOL(load_mixer_volumes); |
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 | { |
146 | int dev = iminor(file_inode(file)); |
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 | 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 | |
177 | static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
178 | { |
179 | int dev = iminor(file_inode(file)); |
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 | |
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 | 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 | |
255 | static 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 | |
289 | static 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 | |
301 | static 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 | |
312 | static 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 | /* Try to load the mixer... */ |
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 | |
333 | static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
334 | { |
335 | int len = 0, dtype; |
336 | int dev = iminor(file_inode(file)); |
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 | * Have to validate the address given by the process. |
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 && /* Mixer ioctl */ |
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 | |
407 | static unsigned int sound_poll(struct file *file, poll_table * wait) |
408 | { |
409 | struct inode *inode = file_inode(file); |
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 | |
429 | static 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_inode(file)); |
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) /* Map write and read/write to the output buf */ |
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 | |
498 | const 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 | * Create the required special subdevices |
512 | */ |
513 | |
514 | static 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); |
524 | bad: |
525 | return -1; |
526 | } |
527 | |
528 | |
529 | static int dmabuf; |
530 | static int dmabug; |
531 | |
532 | module_param(dmabuf, int, 0444); |
533 | module_param(dmabug, int, 0444); |
534 | |
535 | /* additional minors for compatibility */ |
536 | struct oss_minor_dev { |
537 | unsigned short minor; |
538 | unsigned int enabled; |
539 | } dev_list[] = { |
540 | { SND_DEV_DSP16 }, |
541 | { SND_DEV_AUDIO }, |
542 | }; |
543 | |
544 | static 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 | /* Protecting the innocent */ |
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 | |
578 | static 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 | |
608 | module_init(oss_init); |
609 | module_exit(oss_cleanup); |
610 | MODULE_LICENSE("GPL"); |
611 | MODULE_DESCRIPTION("OSS Sound subsystem"); |
612 | MODULE_AUTHOR("Hannu Savolainen, et al."); |
613 | |
614 | |
615 | int 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 | } |
626 | EXPORT_SYMBOL(sound_alloc_dma); |
627 | |
628 | int 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 | } |
642 | EXPORT_SYMBOL(sound_open_dma); |
643 | |
644 | void sound_free_dma(int chn) |
645 | { |
646 | if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) { |
647 | /* printk( "sound_free_dma: Bad access to DMA channel %d\n", chn); */ |
648 | return; |
649 | } |
650 | free_dma(chn); |
651 | dma_alloc_map[chn] = DMA_MAP_UNAVAIL; |
652 | } |
653 | EXPORT_SYMBOL(sound_free_dma); |
654 | |
655 | void 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 | } |
663 | EXPORT_SYMBOL(sound_close_dma); |
664 | |
665 | static void do_sequencer_timer(unsigned long dummy) |
666 | { |
667 | sequencer_timer(0); |
668 | } |
669 | |
670 | |
671 | static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0); |
672 | |
673 | void 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 | |
693 | void sound_stop_timer(void) |
694 | { |
695 | del_timer(&seq_timer); |
696 | } |
697 | |
698 | void 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 | } |
717 | EXPORT_SYMBOL(conf_printf); |
718 | |
719 | void 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 | } |
738 | EXPORT_SYMBOL(conf_printf2); |
739 | |
740 |
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v2.6.34-rc5
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