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> | |
1da177e4 | 39 | #include <linux/ioport.h> |
1da177e4 LT |
40 | #include <linux/major.h> |
41 | #include <linux/delay.h> | |
42 | #include <linux/proc_fs.h> | |
645ef9ef | 43 | #include <linux/mutex.h> |
1da177e4 | 44 | #include <linux/module.h> |
f23f6e08 | 45 | #include <linux/mm.h> |
6473d160 | 46 | #include <linux/device.h> |
1da177e4 LT |
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 | */ | |
444c1953 | 58 | void * sound_mem_blocks[MAX_MEM_BLOCKS]; |
645ef9ef | 59 | static DEFINE_MUTEX(soundcard_mutex); |
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++) { | |
d81a12bc | 90 | if (strncmp(name, mixer_vols[i].name, 32) == 0) { |
1da177e4 LT |
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 | ||
d81a12bc | 102 | strncpy(mixer_vols[n].name, name, 32); |
1da177e4 LT |
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 | { | |
496ad9aa | 146 | int dev = iminor(file_inode(file)); |
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 | ||
645ef9ef | 155 | mutex_lock(&soundcard_mutex); |
1da177e4 | 156 | |
1da177e4 LT |
157 | switch (dev & 0x0f) { |
158 | case SND_DEV_DSP: | |
159 | case SND_DEV_DSP16: | |
160 | case SND_DEV_AUDIO: | |
161 | ret = audio_read(dev, file, buf, count); | |
162 | break; | |
163 | ||
164 | case SND_DEV_SEQ: | |
165 | case SND_DEV_SEQ2: | |
166 | ret = sequencer_read(dev, file, buf, count); | |
167 | break; | |
168 | ||
169 | case SND_DEV_MIDIN: | |
170 | ret = MIDIbuf_read(dev, file, buf, count); | |
171 | } | |
645ef9ef | 172 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
173 | return ret; |
174 | } | |
175 | ||
176 | static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
177 | { | |
496ad9aa | 178 | int dev = iminor(file_inode(file)); |
1da177e4 LT |
179 | int ret = -EINVAL; |
180 | ||
645ef9ef | 181 | mutex_lock(&soundcard_mutex); |
1da177e4 LT |
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 | } | |
645ef9ef | 198 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
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 | ||
1da177e4 LT |
207 | if ((dev >= SND_NDEVS) || (dev < 0)) { |
208 | printk(KERN_ERR "Invalid minor device %d\n", dev); | |
209 | return -ENXIO; | |
210 | } | |
645ef9ef | 211 | mutex_lock(&soundcard_mutex); |
1da177e4 LT |
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 | } | |
90dc763f | 218 | retval = -ENXIO; |
1da177e4 | 219 | if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL)) |
90dc763f | 220 | break; |
1da177e4 LT |
221 | |
222 | if (!try_module_get(mixer_devs[dev]->owner)) | |
90dc763f AB |
223 | break; |
224 | ||
225 | retval = 0; | |
1da177e4 LT |
226 | break; |
227 | ||
228 | case SND_DEV_SEQ: | |
229 | case SND_DEV_SEQ2: | |
90dc763f | 230 | retval = sequencer_open(dev, file); |
1da177e4 LT |
231 | break; |
232 | ||
233 | case SND_DEV_MIDIN: | |
90dc763f | 234 | retval = MIDIbuf_open(dev, file); |
1da177e4 LT |
235 | break; |
236 | ||
237 | case SND_DEV_DSP: | |
238 | case SND_DEV_DSP16: | |
239 | case SND_DEV_AUDIO: | |
90dc763f | 240 | retval = audio_open(dev, file); |
1da177e4 LT |
241 | break; |
242 | ||
243 | default: | |
244 | printk(KERN_ERR "Invalid minor device %d\n", dev); | |
90dc763f | 245 | retval = -ENXIO; |
1da177e4 LT |
246 | } |
247 | ||
645ef9ef | 248 | mutex_unlock(&soundcard_mutex); |
b7d22ccf | 249 | return retval; |
1da177e4 LT |
250 | } |
251 | ||
252 | static int sound_release(struct inode *inode, struct file *file) | |
253 | { | |
254 | int dev = iminor(inode); | |
255 | ||
645ef9ef | 256 | mutex_lock(&soundcard_mutex); |
1da177e4 LT |
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 | } | |
645ef9ef | 280 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
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 | ||
6b98515a | 329 | static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
330 | { |
331 | int len = 0, dtype; | |
496ad9aa | 332 | int dev = iminor(file_inode(file)); |
6b98515a | 333 | long ret = -EINVAL; |
1da177e4 LT |
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 | } | |
1da177e4 LT |
350 | if (cmd == OSS_GETVERSION) |
351 | return __put_user(SOUND_VERSION, (int __user *)p); | |
352 | ||
645ef9ef | 353 | mutex_lock(&soundcard_mutex); |
1da177e4 LT |
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: | |
6b98515a | 361 | ret = sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev, |
1da177e4 | 362 | cmd, p); |
6b98515a | 363 | break; |
1da177e4 | 364 | default: |
6b98515a AC |
365 | ret = sound_mixer_ioctl(dev >> 4, cmd, p); |
366 | break; | |
1da177e4 | 367 | } |
645ef9ef | 368 | mutex_unlock(&soundcard_mutex); |
6b98515a | 369 | return ret; |
1da177e4 | 370 | } |
6b98515a | 371 | |
1da177e4 LT |
372 | switch (dev & 0x0f) { |
373 | case SND_DEV_CTL: | |
374 | if (cmd == SOUND_MIXER_GETLEVELS) | |
6b98515a AC |
375 | ret = get_mixer_levels(p); |
376 | else if (cmd == SOUND_MIXER_SETLEVELS) | |
377 | ret = set_mixer_levels(p); | |
378 | else | |
379 | ret = sound_mixer_ioctl(dev >> 4, cmd, p); | |
380 | break; | |
1da177e4 LT |
381 | |
382 | case SND_DEV_SEQ: | |
383 | case SND_DEV_SEQ2: | |
6b98515a AC |
384 | ret = sequencer_ioctl(dev, file, cmd, p); |
385 | break; | |
1da177e4 LT |
386 | |
387 | case SND_DEV_DSP: | |
388 | case SND_DEV_DSP16: | |
389 | case SND_DEV_AUDIO: | |
d4cfa4d1 | 390 | ret = audio_ioctl(dev, file, cmd, p); |
1da177e4 LT |
391 | break; |
392 | ||
393 | case SND_DEV_MIDIN: | |
d4cfa4d1 | 394 | ret = MIDIbuf_ioctl(dev, file, cmd, p); |
1da177e4 LT |
395 | break; |
396 | ||
397 | } | |
645ef9ef | 398 | mutex_unlock(&soundcard_mutex); |
6b98515a | 399 | return ret; |
1da177e4 LT |
400 | } |
401 | ||
402 | static unsigned int sound_poll(struct file *file, poll_table * wait) | |
403 | { | |
496ad9aa | 404 | struct inode *inode = file_inode(file); |
1da177e4 LT |
405 | int dev = iminor(inode); |
406 | ||
1da177e4 LT |
407 | switch (dev & 0x0f) { |
408 | case SND_DEV_SEQ: | |
409 | case SND_DEV_SEQ2: | |
410 | return sequencer_poll(dev, file, wait); | |
411 | ||
412 | case SND_DEV_MIDIN: | |
413 | return MIDIbuf_poll(dev, file, wait); | |
414 | ||
415 | case SND_DEV_DSP: | |
416 | case SND_DEV_DSP16: | |
417 | case SND_DEV_AUDIO: | |
418 | return DMAbuf_poll(file, dev >> 4, wait); | |
419 | } | |
420 | return 0; | |
421 | } | |
422 | ||
423 | static int sound_mmap(struct file *file, struct vm_area_struct *vma) | |
424 | { | |
425 | int dev_class; | |
426 | unsigned long size; | |
427 | struct dma_buffparms *dmap = NULL; | |
496ad9aa | 428 | int dev = iminor(file_inode(file)); |
1da177e4 LT |
429 | |
430 | dev_class = dev & 0x0f; | |
431 | dev >>= 4; | |
432 | ||
433 | if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) { | |
434 | printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n"); | |
435 | return -EINVAL; | |
436 | } | |
645ef9ef | 437 | mutex_lock(&soundcard_mutex); |
1da177e4 LT |
438 | if (vma->vm_flags & VM_WRITE) /* Map write and read/write to the output buf */ |
439 | dmap = audio_devs[dev]->dmap_out; | |
440 | else if (vma->vm_flags & VM_READ) | |
441 | dmap = audio_devs[dev]->dmap_in; | |
442 | else { | |
443 | printk(KERN_ERR "Sound: Undefined mmap() access\n"); | |
645ef9ef | 444 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
445 | return -EINVAL; |
446 | } | |
447 | ||
448 | if (dmap == NULL) { | |
449 | printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n"); | |
645ef9ef | 450 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
451 | return -EIO; |
452 | } | |
453 | if (dmap->raw_buf == NULL) { | |
454 | printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n"); | |
645ef9ef | 455 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
456 | return -EIO; |
457 | } | |
458 | if (dmap->mapping_flags) { | |
459 | printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n"); | |
645ef9ef | 460 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
461 | return -EIO; |
462 | } | |
463 | if (vma->vm_pgoff != 0) { | |
464 | printk(KERN_ERR "Sound: mmap() offset must be 0.\n"); | |
645ef9ef | 465 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
466 | return -EINVAL; |
467 | } | |
468 | size = vma->vm_end - vma->vm_start; | |
469 | ||
470 | if (size != dmap->bytes_in_use) { | |
471 | printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use); | |
472 | } | |
473 | if (remap_pfn_range(vma, vma->vm_start, | |
474 | virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT, | |
475 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) { | |
645ef9ef | 476 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
477 | return -EAGAIN; |
478 | } | |
479 | ||
480 | dmap->mapping_flags |= DMA_MAP_MAPPED; | |
481 | ||
482 | if( audio_devs[dev]->d->mmap) | |
483 | audio_devs[dev]->d->mmap(dev); | |
484 | ||
485 | memset(dmap->raw_buf, | |
486 | dmap->neutral_byte, | |
487 | dmap->bytes_in_use); | |
645ef9ef | 488 | mutex_unlock(&soundcard_mutex); |
1da177e4 LT |
489 | return 0; |
490 | } | |
491 | ||
9c2e08c5 | 492 | const struct file_operations oss_sound_fops = { |
1da177e4 LT |
493 | .owner = THIS_MODULE, |
494 | .llseek = no_llseek, | |
495 | .read = sound_read, | |
496 | .write = sound_write, | |
497 | .poll = sound_poll, | |
6b98515a | 498 | .unlocked_ioctl = sound_ioctl, |
1da177e4 LT |
499 | .mmap = sound_mmap, |
500 | .open = sound_open, | |
501 | .release = sound_release, | |
502 | }; | |
503 | ||
504 | /* | |
505 | * Create the required special subdevices | |
506 | */ | |
507 | ||
508 | static int create_special_devices(void) | |
509 | { | |
510 | int seq1,seq2; | |
511 | seq1=register_sound_special(&oss_sound_fops, 1); | |
512 | if(seq1==-1) | |
513 | goto bad; | |
514 | seq2=register_sound_special(&oss_sound_fops, 8); | |
515 | if(seq2!=-1) | |
516 | return 0; | |
517 | unregister_sound_special(1); | |
518 | bad: | |
519 | return -1; | |
520 | } | |
521 | ||
522 | ||
1da177e4 LT |
523 | static int dmabuf; |
524 | static int dmabug; | |
525 | ||
526 | module_param(dmabuf, int, 0444); | |
527 | module_param(dmabug, int, 0444); | |
528 | ||
848669da TI |
529 | /* additional minors for compatibility */ |
530 | struct oss_minor_dev { | |
531 | unsigned short minor; | |
532 | unsigned int enabled; | |
533 | } dev_list[] = { | |
534 | { SND_DEV_DSP16 }, | |
535 | { SND_DEV_AUDIO }, | |
536 | }; | |
537 | ||
1da177e4 LT |
538 | static int __init oss_init(void) |
539 | { | |
540 | int err; | |
541 | int i, j; | |
542 | ||
1da177e4 LT |
543 | #ifdef CONFIG_PCI |
544 | if(dmabug) | |
545 | isa_dma_bridge_buggy = dmabug; | |
546 | #endif | |
547 | ||
548 | err = create_special_devices(); | |
549 | if (err) { | |
550 | printk(KERN_ERR "sound: driver already loaded/included in kernel\n"); | |
551 | return err; | |
552 | } | |
553 | ||
554 | /* Protecting the innocent */ | |
555 | sound_dmap_flag = (dmabuf > 0 ? 1 : 0); | |
556 | ||
b322f409 | 557 | for (i = 0; i < ARRAY_SIZE(dev_list); i++) { |
848669da TI |
558 | j = 0; |
559 | do { | |
560 | unsigned short minor = dev_list[i].minor + j * 0x10; | |
561 | if (!register_sound_special(&oss_sound_fops, minor)) | |
562 | dev_list[i].enabled = (1 << j); | |
563 | } while (++j < num_audiodevs); | |
1da177e4 LT |
564 | } |
565 | ||
444c1953 | 566 | if (sound_nblocks >= MAX_MEM_BLOCKS - 1) |
1da177e4 LT |
567 | printk(KERN_ERR "Sound warning: Deallocation table was too small.\n"); |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | static void __exit oss_cleanup(void) | |
573 | { | |
574 | int i, j; | |
575 | ||
b322f409 | 576 | for (i = 0; i < ARRAY_SIZE(dev_list); i++) { |
848669da TI |
577 | j = 0; |
578 | do { | |
579 | if (dev_list[i].enabled & (1 << j)) | |
580 | unregister_sound_special(dev_list[i].minor); | |
581 | } while (++j < num_audiodevs); | |
1da177e4 LT |
582 | } |
583 | ||
584 | unregister_sound_special(1); | |
585 | unregister_sound_special(8); | |
586 | ||
587 | sound_stop_timer(); | |
588 | ||
589 | sequencer_unload(); | |
590 | ||
591 | for (i = 0; i < MAX_DMA_CHANNELS; i++) | |
592 | if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) { | |
593 | printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i); | |
594 | sound_free_dma(i); | |
595 | } | |
596 | ||
597 | for (i = 0; i < sound_nblocks; i++) | |
598 | vfree(sound_mem_blocks[i]); | |
599 | ||
600 | } | |
601 | ||
602 | module_init(oss_init); | |
603 | module_exit(oss_cleanup); | |
604 | MODULE_LICENSE("GPL"); | |
ece7f77b AB |
605 | MODULE_DESCRIPTION("OSS Sound subsystem"); |
606 | MODULE_AUTHOR("Hannu Savolainen, et al."); | |
1da177e4 LT |
607 | |
608 | ||
609 | int sound_alloc_dma(int chn, char *deviceID) | |
610 | { | |
611 | int err; | |
612 | ||
613 | if ((err = request_dma(chn, deviceID)) != 0) | |
614 | return err; | |
615 | ||
616 | dma_alloc_map[chn] = DMA_MAP_FREE; | |
617 | ||
618 | return 0; | |
619 | } | |
ece7f77b | 620 | EXPORT_SYMBOL(sound_alloc_dma); |
1da177e4 LT |
621 | |
622 | int sound_open_dma(int chn, char *deviceID) | |
623 | { | |
624 | if (!valid_dma(chn)) { | |
625 | printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn); | |
626 | return 1; | |
627 | } | |
628 | ||
629 | if (dma_alloc_map[chn] != DMA_MAP_FREE) { | |
630 | printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]); | |
631 | return 1; | |
632 | } | |
633 | dma_alloc_map[chn] = DMA_MAP_BUSY; | |
634 | return 0; | |
635 | } | |
ece7f77b | 636 | EXPORT_SYMBOL(sound_open_dma); |
1da177e4 LT |
637 | |
638 | void sound_free_dma(int chn) | |
639 | { | |
640 | if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) { | |
641 | /* printk( "sound_free_dma: Bad access to DMA channel %d\n", chn); */ | |
642 | return; | |
643 | } | |
644 | free_dma(chn); | |
645 | dma_alloc_map[chn] = DMA_MAP_UNAVAIL; | |
646 | } | |
ece7f77b | 647 | EXPORT_SYMBOL(sound_free_dma); |
1da177e4 LT |
648 | |
649 | void sound_close_dma(int chn) | |
650 | { | |
651 | if (dma_alloc_map[chn] != DMA_MAP_BUSY) { | |
652 | printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn); | |
653 | return; | |
654 | } | |
655 | dma_alloc_map[chn] = DMA_MAP_FREE; | |
656 | } | |
ece7f77b | 657 | EXPORT_SYMBOL(sound_close_dma); |
1da177e4 LT |
658 | |
659 | static void do_sequencer_timer(unsigned long dummy) | |
660 | { | |
661 | sequencer_timer(0); | |
662 | } | |
663 | ||
664 | ||
8d06afab | 665 | static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0); |
1da177e4 LT |
666 | |
667 | void request_sound_timer(int count) | |
668 | { | |
669 | extern unsigned long seq_time; | |
670 | ||
671 | if (count < 0) { | |
672 | seq_timer.expires = (-count) + jiffies; | |
673 | add_timer(&seq_timer); | |
674 | return; | |
675 | } | |
676 | count += seq_time; | |
677 | ||
678 | count -= jiffies; | |
679 | ||
680 | if (count < 1) | |
681 | count = 1; | |
682 | ||
683 | seq_timer.expires = (count) + jiffies; | |
684 | add_timer(&seq_timer); | |
685 | } | |
686 | ||
687 | void sound_stop_timer(void) | |
688 | { | |
689 | del_timer(&seq_timer); | |
690 | } | |
691 | ||
692 | void conf_printf(char *name, struct address_info *hw_config) | |
693 | { | |
694 | #ifndef CONFIG_SOUND_TRACEINIT | |
695 | return; | |
696 | #else | |
697 | printk("<%s> at 0x%03x", name, hw_config->io_base); | |
698 | ||
699 | if (hw_config->irq) | |
700 | printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq); | |
701 | ||
702 | if (hw_config->dma != -1 || hw_config->dma2 != -1) | |
703 | { | |
704 | printk(" dma %d", hw_config->dma); | |
705 | if (hw_config->dma2 != -1) | |
706 | printk(",%d", hw_config->dma2); | |
707 | } | |
708 | printk("\n"); | |
709 | #endif | |
710 | } | |
ece7f77b | 711 | EXPORT_SYMBOL(conf_printf); |
1da177e4 LT |
712 | |
713 | void conf_printf2(char *name, int base, int irq, int dma, int dma2) | |
714 | { | |
715 | #ifndef CONFIG_SOUND_TRACEINIT | |
716 | return; | |
717 | #else | |
718 | printk("<%s> at 0x%03x", name, base); | |
719 | ||
720 | if (irq) | |
721 | printk(" irq %d", (irq > 0) ? irq : -irq); | |
722 | ||
723 | if (dma != -1 || dma2 != -1) | |
724 | { | |
725 | printk(" dma %d", dma); | |
726 | if (dma2 != -1) | |
727 | printk(",%d", dma2); | |
728 | } | |
729 | printk("\n"); | |
730 | #endif | |
731 | } | |
ece7f77b AB |
732 | EXPORT_SYMBOL(conf_printf2); |
733 |