Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
f30c2269 | 2 | * sound/oss/audio.c |
1da177e4 LT |
3 | * |
4 | * Device file manager for /dev/audio | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Copyright (C) by Hannu Savolainen 1993-1997 | |
9 | * | |
10 | * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL) | |
11 | * Version 2 (June 1991). See the "COPYING" file distributed with this software | |
12 | * for more info. | |
13 | */ | |
14 | /* | |
15 | * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed) | |
16 | * Thomas Sailer : moved several static variables into struct audio_operations | |
17 | * (which is grossly misnamed btw.) because they have the same | |
18 | * lifetime as the rest in there and dynamic allocation saves | |
19 | * 12k or so | |
20 | * Thomas Sailer : use more logical O_NONBLOCK semantics | |
21 | * Daniel Rodriksson: reworked the use of the device specific copy_user | |
22 | * still generic | |
23 | * Horst von Brand: Add missing #include <linux/string.h> | |
24 | * Chris Rankin : Update the module-usage counter for the coprocessor, | |
25 | * and decrement the counters again if we cannot open | |
26 | * the audio device. | |
27 | */ | |
28 | ||
29 | #include <linux/stddef.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/kmod.h> | |
32 | ||
33 | #include "sound_config.h" | |
34 | #include "ulaw.h" | |
35 | #include "coproc.h" | |
36 | ||
37 | #define NEUTRAL8 0x80 | |
38 | #define NEUTRAL16 0x00 | |
39 | ||
40 | ||
41 | static int dma_ioctl(int dev, unsigned int cmd, void __user *arg); | |
42 | ||
43 | static int set_format(int dev, int fmt) | |
44 | { | |
45 | if (fmt != AFMT_QUERY) | |
46 | { | |
47 | audio_devs[dev]->local_conversion = 0; | |
48 | ||
49 | if (!(audio_devs[dev]->format_mask & fmt)) /* Not supported */ | |
50 | { | |
51 | if (fmt == AFMT_MU_LAW) | |
52 | { | |
53 | fmt = AFMT_U8; | |
54 | audio_devs[dev]->local_conversion = CNV_MU_LAW; | |
55 | } | |
56 | else | |
57 | fmt = AFMT_U8; /* This is always supported */ | |
58 | } | |
59 | audio_devs[dev]->audio_format = audio_devs[dev]->d->set_bits(dev, fmt); | |
60 | audio_devs[dev]->local_format = fmt; | |
61 | } | |
62 | else | |
63 | return audio_devs[dev]->local_format; | |
64 | ||
65 | if (audio_devs[dev]->local_conversion) | |
66 | return audio_devs[dev]->local_conversion; | |
67 | else | |
68 | return audio_devs[dev]->local_format; | |
69 | } | |
70 | ||
71 | int audio_open(int dev, struct file *file) | |
72 | { | |
73 | int ret; | |
74 | int bits; | |
75 | int dev_type = dev & 0x0f; | |
76 | int mode = translate_mode(file); | |
77 | const struct audio_driver *driver; | |
78 | const struct coproc_operations *coprocessor; | |
79 | ||
80 | dev = dev >> 4; | |
81 | ||
82 | if (dev_type == SND_DEV_DSP16) | |
83 | bits = 16; | |
84 | else | |
85 | bits = 8; | |
86 | ||
87 | if (dev < 0 || dev >= num_audiodevs) | |
88 | return -ENXIO; | |
89 | ||
90 | driver = audio_devs[dev]->d; | |
91 | ||
92 | if (!try_module_get(driver->owner)) | |
93 | return -ENODEV; | |
94 | ||
95 | if ((ret = DMAbuf_open(dev, mode)) < 0) | |
96 | goto error_1; | |
97 | ||
98 | if ( (coprocessor = audio_devs[dev]->coproc) != NULL ) { | |
99 | if (!try_module_get(coprocessor->owner)) | |
100 | goto error_2; | |
101 | ||
102 | if ((ret = coprocessor->open(coprocessor->devc, COPR_PCM)) < 0) { | |
103 | printk(KERN_WARNING "Sound: Can't access coprocessor device\n"); | |
104 | goto error_3; | |
105 | } | |
106 | } | |
107 | ||
108 | audio_devs[dev]->local_conversion = 0; | |
109 | ||
110 | if (dev_type == SND_DEV_AUDIO) | |
111 | set_format(dev, AFMT_MU_LAW); | |
112 | else | |
113 | set_format(dev, bits); | |
114 | ||
115 | audio_devs[dev]->audio_mode = AM_NONE; | |
116 | ||
117 | return 0; | |
118 | ||
119 | /* | |
120 | * Clean-up stack: this is what needs (un)doing if | |
121 | * we can't open the audio device ... | |
122 | */ | |
123 | error_3: | |
124 | module_put(coprocessor->owner); | |
125 | ||
126 | error_2: | |
127 | DMAbuf_release(dev, mode); | |
128 | ||
129 | error_1: | |
130 | module_put(driver->owner); | |
131 | ||
132 | return ret; | |
133 | } | |
134 | ||
135 | static void sync_output(int dev) | |
136 | { | |
137 | int p, i; | |
138 | int l; | |
139 | struct dma_buffparms *dmap = audio_devs[dev]->dmap_out; | |
140 | ||
141 | if (dmap->fragment_size <= 0) | |
142 | return; | |
143 | dmap->flags |= DMA_POST; | |
144 | ||
145 | /* Align the write pointer with fragment boundaries */ | |
146 | ||
147 | if ((l = dmap->user_counter % dmap->fragment_size) > 0) | |
148 | { | |
149 | int len; | |
150 | unsigned long offs = dmap->user_counter % dmap->bytes_in_use; | |
151 | ||
152 | len = dmap->fragment_size - l; | |
153 | memset(dmap->raw_buf + offs, dmap->neutral_byte, len); | |
154 | DMAbuf_move_wrpointer(dev, len); | |
155 | } | |
156 | ||
157 | /* | |
158 | * Clean all unused buffer fragments. | |
159 | */ | |
160 | ||
161 | p = dmap->qtail; | |
162 | dmap->flags |= DMA_POST; | |
163 | ||
164 | for (i = dmap->qlen + 1; i < dmap->nbufs; i++) | |
165 | { | |
166 | p = (p + 1) % dmap->nbufs; | |
167 | if (((dmap->raw_buf + p * dmap->fragment_size) + dmap->fragment_size) > | |
168 | (dmap->raw_buf + dmap->buffsize)) | |
169 | printk(KERN_ERR "audio: Buffer error 2\n"); | |
170 | ||
171 | memset(dmap->raw_buf + p * dmap->fragment_size, | |
172 | dmap->neutral_byte, | |
173 | dmap->fragment_size); | |
174 | } | |
175 | ||
176 | dmap->flags |= DMA_DIRTY; | |
177 | } | |
178 | ||
179 | void audio_release(int dev, struct file *file) | |
180 | { | |
181 | const struct coproc_operations *coprocessor; | |
182 | int mode = translate_mode(file); | |
183 | ||
184 | dev = dev >> 4; | |
185 | ||
186 | /* | |
187 | * We do this in DMAbuf_release(). Why are we doing it | |
188 | * here? Why don't we test the file mode before setting | |
189 | * both flags? DMAbuf_release() does. | |
190 | * ...pester...pester...pester... | |
191 | */ | |
192 | audio_devs[dev]->dmap_out->closing = 1; | |
193 | audio_devs[dev]->dmap_in->closing = 1; | |
194 | ||
195 | /* | |
196 | * We need to make sure we allocated the dmap_out buffer | |
197 | * before we go mucking around with it in sync_output(). | |
198 | */ | |
199 | if (mode & OPEN_WRITE) | |
200 | sync_output(dev); | |
201 | ||
202 | if ( (coprocessor = audio_devs[dev]->coproc) != NULL ) { | |
203 | coprocessor->close(coprocessor->devc, COPR_PCM); | |
204 | module_put(coprocessor->owner); | |
205 | } | |
206 | DMAbuf_release(dev, mode); | |
207 | ||
208 | module_put(audio_devs[dev]->d->owner); | |
209 | } | |
210 | ||
211 | static void translate_bytes(const unsigned char *table, unsigned char *buff, int n) | |
212 | { | |
213 | unsigned long i; | |
214 | ||
215 | if (n <= 0) | |
216 | return; | |
217 | ||
218 | for (i = 0; i < n; ++i) | |
219 | buff[i] = table[buff[i]]; | |
220 | } | |
221 | ||
222 | int audio_write(int dev, struct file *file, const char __user *buf, int count) | |
223 | { | |
224 | int c, p, l, buf_size, used, returned; | |
225 | int err; | |
226 | char *dma_buf; | |
227 | ||
228 | dev = dev >> 4; | |
229 | ||
230 | p = 0; | |
231 | c = count; | |
232 | ||
233 | if(count < 0) | |
234 | return -EINVAL; | |
235 | ||
236 | if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) | |
237 | return -EPERM; | |
238 | ||
239 | if (audio_devs[dev]->flags & DMA_DUPLEX) | |
240 | audio_devs[dev]->audio_mode |= AM_WRITE; | |
241 | else | |
242 | audio_devs[dev]->audio_mode = AM_WRITE; | |
243 | ||
244 | if (!count) /* Flush output */ | |
245 | { | |
246 | sync_output(dev); | |
247 | return 0; | |
248 | } | |
249 | ||
250 | while (c) | |
251 | { | |
252 | if ((err = DMAbuf_getwrbuffer(dev, &dma_buf, &buf_size, !!(file->f_flags & O_NONBLOCK))) < 0) | |
253 | { | |
254 | /* Handle nonblocking mode */ | |
255 | if ((file->f_flags & O_NONBLOCK) && err == -EAGAIN) | |
256 | return p? p : -EAGAIN; /* No more space. Return # of accepted bytes */ | |
257 | return err; | |
258 | } | |
259 | l = c; | |
260 | ||
261 | if (l > buf_size) | |
262 | l = buf_size; | |
263 | ||
264 | returned = l; | |
265 | used = l; | |
266 | if (!audio_devs[dev]->d->copy_user) | |
267 | { | |
268 | if ((dma_buf + l) > | |
269 | (audio_devs[dev]->dmap_out->raw_buf + audio_devs[dev]->dmap_out->buffsize)) | |
270 | { | |
271 | printk(KERN_ERR "audio: Buffer error 3 (%lx,%d), (%lx, %d)\n", (long) dma_buf, l, (long) audio_devs[dev]->dmap_out->raw_buf, (int) audio_devs[dev]->dmap_out->buffsize); | |
272 | return -EDOM; | |
273 | } | |
274 | if (dma_buf < audio_devs[dev]->dmap_out->raw_buf) | |
275 | { | |
276 | printk(KERN_ERR "audio: Buffer error 13 (%lx<%lx)\n", (long) dma_buf, (long) audio_devs[dev]->dmap_out->raw_buf); | |
277 | return -EDOM; | |
278 | } | |
279 | if(copy_from_user(dma_buf, &(buf)[p], l)) | |
280 | return -EFAULT; | |
281 | } | |
282 | else audio_devs[dev]->d->copy_user (dev, | |
283 | dma_buf, 0, | |
284 | buf, p, | |
285 | c, buf_size, | |
286 | &used, &returned, | |
287 | l); | |
288 | l = returned; | |
289 | ||
290 | if (audio_devs[dev]->local_conversion & CNV_MU_LAW) | |
291 | { | |
292 | translate_bytes(ulaw_dsp, (unsigned char *) dma_buf, l); | |
293 | } | |
294 | c -= used; | |
295 | p += used; | |
296 | DMAbuf_move_wrpointer(dev, l); | |
297 | ||
298 | } | |
299 | ||
300 | return count; | |
301 | } | |
302 | ||
303 | int audio_read(int dev, struct file *file, char __user *buf, int count) | |
304 | { | |
305 | int c, p, l; | |
306 | char *dmabuf; | |
307 | int buf_no; | |
308 | ||
309 | dev = dev >> 4; | |
310 | p = 0; | |
311 | c = count; | |
312 | ||
313 | if (!(audio_devs[dev]->open_mode & OPEN_READ)) | |
314 | return -EPERM; | |
315 | ||
316 | if ((audio_devs[dev]->audio_mode & AM_WRITE) && !(audio_devs[dev]->flags & DMA_DUPLEX)) | |
317 | sync_output(dev); | |
318 | ||
319 | if (audio_devs[dev]->flags & DMA_DUPLEX) | |
320 | audio_devs[dev]->audio_mode |= AM_READ; | |
321 | else | |
322 | audio_devs[dev]->audio_mode = AM_READ; | |
323 | ||
324 | while(c) | |
325 | { | |
326 | if ((buf_no = DMAbuf_getrdbuffer(dev, &dmabuf, &l, !!(file->f_flags & O_NONBLOCK))) < 0) | |
327 | { | |
328 | /* | |
329 | * Nonblocking mode handling. Return current # of bytes | |
330 | */ | |
331 | ||
332 | if (p > 0) /* Avoid throwing away data */ | |
333 | return p; /* Return it instead */ | |
334 | ||
335 | if ((file->f_flags & O_NONBLOCK) && buf_no == -EAGAIN) | |
336 | return -EAGAIN; | |
337 | ||
338 | return buf_no; | |
339 | } | |
340 | if (l > c) | |
341 | l = c; | |
342 | ||
343 | /* | |
344 | * Insert any local processing here. | |
345 | */ | |
346 | ||
347 | if (audio_devs[dev]->local_conversion & CNV_MU_LAW) | |
348 | { | |
349 | translate_bytes(dsp_ulaw, (unsigned char *) dmabuf, l); | |
350 | } | |
351 | ||
352 | { | |
353 | char *fixit = dmabuf; | |
354 | ||
355 | if(copy_to_user(&(buf)[p], fixit, l)) | |
356 | return -EFAULT; | |
357 | }; | |
358 | ||
359 | DMAbuf_rmchars(dev, buf_no, l); | |
360 | ||
361 | p += l; | |
362 | c -= l; | |
363 | } | |
364 | ||
365 | return count - c; | |
366 | } | |
367 | ||
368 | int audio_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg) | |
369 | { | |
370 | int val, count; | |
371 | unsigned long flags; | |
372 | struct dma_buffparms *dmap; | |
373 | int __user *p = arg; | |
374 | ||
375 | dev = dev >> 4; | |
376 | ||
377 | if (_IOC_TYPE(cmd) == 'C') { | |
378 | if (audio_devs[dev]->coproc) /* Coprocessor ioctl */ | |
379 | return audio_devs[dev]->coproc->ioctl(audio_devs[dev]->coproc->devc, cmd, arg, 0); | |
380 | /* else | |
381 | printk(KERN_DEBUG"/dev/dsp%d: No coprocessor for this device\n", dev); */ | |
382 | return -ENXIO; | |
383 | } | |
384 | else switch (cmd) | |
385 | { | |
386 | case SNDCTL_DSP_SYNC: | |
387 | if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) | |
388 | return 0; | |
389 | if (audio_devs[dev]->dmap_out->fragment_size == 0) | |
390 | return 0; | |
391 | sync_output(dev); | |
392 | DMAbuf_sync(dev); | |
393 | DMAbuf_reset(dev); | |
394 | return 0; | |
395 | ||
396 | case SNDCTL_DSP_POST: | |
397 | if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) | |
398 | return 0; | |
399 | if (audio_devs[dev]->dmap_out->fragment_size == 0) | |
400 | return 0; | |
401 | audio_devs[dev]->dmap_out->flags |= DMA_POST | DMA_DIRTY; | |
402 | sync_output(dev); | |
403 | dma_ioctl(dev, SNDCTL_DSP_POST, NULL); | |
404 | return 0; | |
405 | ||
406 | case SNDCTL_DSP_RESET: | |
407 | audio_devs[dev]->audio_mode = AM_NONE; | |
408 | DMAbuf_reset(dev); | |
409 | return 0; | |
410 | ||
411 | case SNDCTL_DSP_GETFMTS: | |
412 | val = audio_devs[dev]->format_mask | AFMT_MU_LAW; | |
413 | break; | |
414 | ||
415 | case SNDCTL_DSP_SETFMT: | |
416 | if (get_user(val, p)) | |
417 | return -EFAULT; | |
418 | val = set_format(dev, val); | |
419 | break; | |
420 | ||
421 | case SNDCTL_DSP_GETISPACE: | |
422 | if (!(audio_devs[dev]->open_mode & OPEN_READ)) | |
423 | return 0; | |
424 | if ((audio_devs[dev]->audio_mode & AM_WRITE) && !(audio_devs[dev]->flags & DMA_DUPLEX)) | |
425 | return -EBUSY; | |
426 | return dma_ioctl(dev, cmd, arg); | |
427 | ||
428 | case SNDCTL_DSP_GETOSPACE: | |
429 | if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) | |
430 | return -EPERM; | |
431 | if ((audio_devs[dev]->audio_mode & AM_READ) && !(audio_devs[dev]->flags & DMA_DUPLEX)) | |
432 | return -EBUSY; | |
433 | return dma_ioctl(dev, cmd, arg); | |
434 | ||
435 | case SNDCTL_DSP_NONBLOCK: | |
436 | file->f_flags |= O_NONBLOCK; | |
437 | return 0; | |
438 | ||
439 | case SNDCTL_DSP_GETCAPS: | |
440 | val = 1 | DSP_CAP_MMAP; /* Revision level of this ioctl() */ | |
441 | if (audio_devs[dev]->flags & DMA_DUPLEX && | |
442 | audio_devs[dev]->open_mode == OPEN_READWRITE) | |
443 | val |= DSP_CAP_DUPLEX; | |
444 | if (audio_devs[dev]->coproc) | |
445 | val |= DSP_CAP_COPROC; | |
446 | if (audio_devs[dev]->d->local_qlen) /* Device has hidden buffers */ | |
447 | val |= DSP_CAP_BATCH; | |
448 | if (audio_devs[dev]->d->trigger) /* Supports SETTRIGGER */ | |
449 | val |= DSP_CAP_TRIGGER; | |
450 | break; | |
451 | ||
452 | case SOUND_PCM_WRITE_RATE: | |
453 | if (get_user(val, p)) | |
454 | return -EFAULT; | |
455 | val = audio_devs[dev]->d->set_speed(dev, val); | |
456 | break; | |
457 | ||
458 | case SOUND_PCM_READ_RATE: | |
459 | val = audio_devs[dev]->d->set_speed(dev, 0); | |
460 | break; | |
461 | ||
462 | case SNDCTL_DSP_STEREO: | |
463 | if (get_user(val, p)) | |
464 | return -EFAULT; | |
465 | if (val > 1 || val < 0) | |
466 | return -EINVAL; | |
467 | val = audio_devs[dev]->d->set_channels(dev, val + 1) - 1; | |
468 | break; | |
469 | ||
470 | case SOUND_PCM_WRITE_CHANNELS: | |
471 | if (get_user(val, p)) | |
472 | return -EFAULT; | |
473 | val = audio_devs[dev]->d->set_channels(dev, val); | |
474 | break; | |
475 | ||
476 | case SOUND_PCM_READ_CHANNELS: | |
477 | val = audio_devs[dev]->d->set_channels(dev, 0); | |
478 | break; | |
479 | ||
480 | case SOUND_PCM_READ_BITS: | |
481 | val = audio_devs[dev]->d->set_bits(dev, 0); | |
482 | break; | |
483 | ||
484 | case SNDCTL_DSP_SETDUPLEX: | |
485 | if (audio_devs[dev]->open_mode != OPEN_READWRITE) | |
486 | return -EPERM; | |
487 | return (audio_devs[dev]->flags & DMA_DUPLEX) ? 0 : -EIO; | |
488 | ||
489 | case SNDCTL_DSP_PROFILE: | |
490 | if (get_user(val, p)) | |
491 | return -EFAULT; | |
492 | if (audio_devs[dev]->open_mode & OPEN_WRITE) | |
493 | audio_devs[dev]->dmap_out->applic_profile = val; | |
494 | if (audio_devs[dev]->open_mode & OPEN_READ) | |
495 | audio_devs[dev]->dmap_in->applic_profile = val; | |
496 | return 0; | |
497 | ||
498 | case SNDCTL_DSP_GETODELAY: | |
499 | dmap = audio_devs[dev]->dmap_out; | |
500 | if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) | |
501 | return -EINVAL; | |
502 | if (!(dmap->flags & DMA_ALLOC_DONE)) | |
503 | { | |
504 | val=0; | |
505 | break; | |
506 | } | |
507 | ||
508 | spin_lock_irqsave(&dmap->lock,flags); | |
509 | /* Compute number of bytes that have been played */ | |
510 | count = DMAbuf_get_buffer_pointer (dev, dmap, DMODE_OUTPUT); | |
511 | if (count < dmap->fragment_size && dmap->qhead != 0) | |
512 | count += dmap->bytes_in_use; /* Pointer wrap not handled yet */ | |
513 | count += dmap->byte_counter; | |
514 | ||
515 | /* Substract current count from the number of bytes written by app */ | |
516 | count = dmap->user_counter - count; | |
517 | if (count < 0) | |
518 | count = 0; | |
519 | spin_unlock_irqrestore(&dmap->lock,flags); | |
520 | val = count; | |
521 | break; | |
522 | ||
523 | default: | |
524 | return dma_ioctl(dev, cmd, arg); | |
525 | } | |
526 | return put_user(val, p); | |
527 | } | |
528 | ||
529 | void audio_init_devices(void) | |
530 | { | |
531 | /* | |
532 | * NOTE! This routine could be called several times during boot. | |
533 | */ | |
534 | } | |
535 | ||
536 | void reorganize_buffers(int dev, struct dma_buffparms *dmap, int recording) | |
537 | { | |
538 | /* | |
539 | * This routine breaks the physical device buffers to logical ones. | |
540 | */ | |
541 | ||
542 | struct audio_operations *dsp_dev = audio_devs[dev]; | |
543 | ||
544 | unsigned i, n; | |
545 | unsigned sr, nc, sz, bsz; | |
546 | ||
547 | sr = dsp_dev->d->set_speed(dev, 0); | |
548 | nc = dsp_dev->d->set_channels(dev, 0); | |
549 | sz = dsp_dev->d->set_bits(dev, 0); | |
550 | ||
551 | if (sz == 8) | |
552 | dmap->neutral_byte = NEUTRAL8; | |
553 | else | |
554 | dmap->neutral_byte = NEUTRAL16; | |
555 | ||
556 | if (sr < 1 || nc < 1 || sz < 1) | |
557 | { | |
558 | /* printk(KERN_DEBUG "Warning: Invalid PCM parameters[%d] sr=%d, nc=%d, sz=%d\n", dev, sr, nc, sz);*/ | |
559 | sr = DSP_DEFAULT_SPEED; | |
560 | nc = 1; | |
561 | sz = 8; | |
562 | } | |
563 | ||
564 | sz = sr * nc * sz; | |
565 | ||
566 | sz /= 8; /* #bits -> #bytes */ | |
567 | dmap->data_rate = sz; | |
568 | ||
569 | if (!dmap->needs_reorg) | |
570 | return; | |
571 | dmap->needs_reorg = 0; | |
572 | ||
573 | if (dmap->fragment_size == 0) | |
574 | { | |
575 | /* Compute the fragment size using the default algorithm */ | |
576 | ||
577 | /* | |
578 | * Compute a buffer size for time not exceeding 1 second. | |
579 | * Usually this algorithm gives a buffer size for 0.5 to 1.0 seconds | |
580 | * of sound (using the current speed, sample size and #channels). | |
581 | */ | |
582 | ||
583 | bsz = dmap->buffsize; | |
584 | while (bsz > sz) | |
585 | bsz /= 2; | |
586 | ||
587 | if (bsz == dmap->buffsize) | |
588 | bsz /= 2; /* Needs at least 2 buffers */ | |
589 | ||
590 | /* | |
591 | * Split the computed fragment to smaller parts. After 3.5a9 | |
592 | * the default subdivision is 4 which should give better | |
593 | * results when recording. | |
594 | */ | |
595 | ||
596 | if (dmap->subdivision == 0) /* Not already set */ | |
597 | { | |
598 | dmap->subdivision = 4; /* Init to the default value */ | |
599 | ||
600 | if ((bsz / dmap->subdivision) > 4096) | |
601 | dmap->subdivision *= 2; | |
602 | if ((bsz / dmap->subdivision) < 4096) | |
603 | dmap->subdivision = 1; | |
604 | } | |
605 | bsz /= dmap->subdivision; | |
606 | ||
607 | if (bsz < 16) | |
608 | bsz = 16; /* Just a sanity check */ | |
609 | ||
610 | dmap->fragment_size = bsz; | |
611 | } | |
612 | else | |
613 | { | |
614 | /* | |
615 | * The process has specified the buffer size with SNDCTL_DSP_SETFRAGMENT or | |
616 | * the buffer size computation has already been done. | |
617 | */ | |
618 | if (dmap->fragment_size > (dmap->buffsize / 2)) | |
619 | dmap->fragment_size = (dmap->buffsize / 2); | |
620 | bsz = dmap->fragment_size; | |
621 | } | |
622 | ||
623 | if (audio_devs[dev]->min_fragment) | |
624 | if (bsz < (1 << audio_devs[dev]->min_fragment)) | |
625 | bsz = 1 << audio_devs[dev]->min_fragment; | |
626 | if (audio_devs[dev]->max_fragment) | |
627 | if (bsz > (1 << audio_devs[dev]->max_fragment)) | |
628 | bsz = 1 << audio_devs[dev]->max_fragment; | |
629 | bsz &= ~0x07; /* Force size which is multiple of 8 bytes */ | |
630 | #ifdef OS_DMA_ALIGN_CHECK | |
631 | OS_DMA_ALIGN_CHECK(bsz); | |
632 | #endif | |
633 | ||
634 | n = dmap->buffsize / bsz; | |
635 | if (n > MAX_SUB_BUFFERS) | |
636 | n = MAX_SUB_BUFFERS; | |
637 | if (n > dmap->max_fragments) | |
638 | n = dmap->max_fragments; | |
639 | ||
640 | if (n < 2) | |
641 | { | |
642 | n = 2; | |
643 | bsz /= 2; | |
644 | } | |
645 | dmap->nbufs = n; | |
646 | dmap->bytes_in_use = n * bsz; | |
647 | dmap->fragment_size = bsz; | |
648 | dmap->max_byte_counter = (dmap->data_rate * 60 * 60) + | |
649 | dmap->bytes_in_use; /* Approximately one hour */ | |
650 | ||
651 | if (dmap->raw_buf) | |
652 | { | |
653 | memset(dmap->raw_buf, dmap->neutral_byte, dmap->bytes_in_use); | |
654 | } | |
655 | ||
656 | for (i = 0; i < dmap->nbufs; i++) | |
657 | { | |
658 | dmap->counts[i] = 0; | |
659 | } | |
660 | ||
661 | dmap->flags |= DMA_ALLOC_DONE | DMA_EMPTY; | |
662 | } | |
663 | ||
664 | static int dma_subdivide(int dev, struct dma_buffparms *dmap, int fact) | |
665 | { | |
666 | if (fact == 0) | |
667 | { | |
668 | fact = dmap->subdivision; | |
669 | if (fact == 0) | |
670 | fact = 1; | |
671 | return fact; | |
672 | } | |
673 | if (dmap->subdivision != 0 || dmap->fragment_size) /* Too late to change */ | |
674 | return -EINVAL; | |
675 | ||
676 | if (fact > MAX_REALTIME_FACTOR) | |
677 | return -EINVAL; | |
678 | ||
679 | if (fact != 1 && fact != 2 && fact != 4 && fact != 8 && fact != 16) | |
680 | return -EINVAL; | |
681 | ||
682 | dmap->subdivision = fact; | |
683 | return fact; | |
684 | } | |
685 | ||
686 | static int dma_set_fragment(int dev, struct dma_buffparms *dmap, int fact) | |
687 | { | |
688 | int bytes, count; | |
689 | ||
690 | if (fact == 0) | |
691 | return -EIO; | |
692 | ||
693 | if (dmap->subdivision != 0 || | |
694 | dmap->fragment_size) /* Too late to change */ | |
695 | return -EINVAL; | |
696 | ||
697 | bytes = fact & 0xffff; | |
698 | count = (fact >> 16) & 0x7fff; | |
699 | ||
700 | if (count == 0) | |
701 | count = MAX_SUB_BUFFERS; | |
702 | else if (count < MAX_SUB_BUFFERS) | |
703 | count++; | |
704 | ||
705 | if (bytes < 4 || bytes > 17) /* <16 || > 512k */ | |
706 | return -EINVAL; | |
707 | ||
708 | if (count < 2) | |
709 | return -EINVAL; | |
710 | ||
711 | if (audio_devs[dev]->min_fragment > 0) | |
712 | if (bytes < audio_devs[dev]->min_fragment) | |
713 | bytes = audio_devs[dev]->min_fragment; | |
714 | ||
715 | if (audio_devs[dev]->max_fragment > 0) | |
716 | if (bytes > audio_devs[dev]->max_fragment) | |
717 | bytes = audio_devs[dev]->max_fragment; | |
718 | ||
719 | #ifdef OS_DMA_MINBITS | |
720 | if (bytes < OS_DMA_MINBITS) | |
721 | bytes = OS_DMA_MINBITS; | |
722 | #endif | |
723 | ||
724 | dmap->fragment_size = (1 << bytes); | |
725 | dmap->max_fragments = count; | |
726 | ||
727 | if (dmap->fragment_size > dmap->buffsize) | |
728 | dmap->fragment_size = dmap->buffsize; | |
729 | ||
730 | if (dmap->fragment_size == dmap->buffsize && | |
731 | audio_devs[dev]->flags & DMA_AUTOMODE) | |
732 | dmap->fragment_size /= 2; /* Needs at least 2 buffers */ | |
733 | ||
734 | dmap->subdivision = 1; /* Disable SNDCTL_DSP_SUBDIVIDE */ | |
735 | return bytes | ((count - 1) << 16); | |
736 | } | |
737 | ||
738 | static int dma_ioctl(int dev, unsigned int cmd, void __user *arg) | |
739 | { | |
740 | struct dma_buffparms *dmap_out = audio_devs[dev]->dmap_out; | |
741 | struct dma_buffparms *dmap_in = audio_devs[dev]->dmap_in; | |
742 | struct dma_buffparms *dmap; | |
743 | audio_buf_info info; | |
744 | count_info cinfo; | |
745 | int fact, ret, changed, bits, count, err; | |
746 | unsigned long flags; | |
747 | ||
748 | switch (cmd) | |
749 | { | |
750 | case SNDCTL_DSP_SUBDIVIDE: | |
751 | ret = 0; | |
752 | if (get_user(fact, (int __user *)arg)) | |
753 | return -EFAULT; | |
754 | if (audio_devs[dev]->open_mode & OPEN_WRITE) | |
755 | ret = dma_subdivide(dev, dmap_out, fact); | |
756 | if (ret < 0) | |
757 | return ret; | |
758 | if (audio_devs[dev]->open_mode != OPEN_WRITE || | |
759 | (audio_devs[dev]->flags & DMA_DUPLEX && | |
760 | audio_devs[dev]->open_mode & OPEN_READ)) | |
761 | ret = dma_subdivide(dev, dmap_in, fact); | |
762 | if (ret < 0) | |
763 | return ret; | |
764 | break; | |
765 | ||
766 | case SNDCTL_DSP_GETISPACE: | |
767 | case SNDCTL_DSP_GETOSPACE: | |
768 | dmap = dmap_out; | |
769 | if (cmd == SNDCTL_DSP_GETISPACE && !(audio_devs[dev]->open_mode & OPEN_READ)) | |
770 | return -EINVAL; | |
771 | if (cmd == SNDCTL_DSP_GETOSPACE && !(audio_devs[dev]->open_mode & OPEN_WRITE)) | |
772 | return -EINVAL; | |
773 | if (cmd == SNDCTL_DSP_GETISPACE && audio_devs[dev]->flags & DMA_DUPLEX) | |
774 | dmap = dmap_in; | |
775 | if (dmap->mapping_flags & DMA_MAP_MAPPED) | |
776 | return -EINVAL; | |
777 | if (!(dmap->flags & DMA_ALLOC_DONE)) | |
778 | reorganize_buffers(dev, dmap, (cmd == SNDCTL_DSP_GETISPACE)); | |
779 | info.fragstotal = dmap->nbufs; | |
780 | if (cmd == SNDCTL_DSP_GETISPACE) | |
781 | info.fragments = dmap->qlen; | |
782 | else | |
783 | { | |
784 | if (!DMAbuf_space_in_queue(dev)) | |
785 | info.fragments = 0; | |
786 | else | |
787 | { | |
788 | info.fragments = DMAbuf_space_in_queue(dev); | |
789 | if (audio_devs[dev]->d->local_qlen) | |
790 | { | |
791 | int tmp = audio_devs[dev]->d->local_qlen(dev); | |
792 | if (tmp && info.fragments) | |
793 | tmp--; /* | |
794 | * This buffer has been counted twice | |
795 | */ | |
796 | info.fragments -= tmp; | |
797 | } | |
798 | } | |
799 | } | |
800 | if (info.fragments < 0) | |
801 | info.fragments = 0; | |
802 | else if (info.fragments > dmap->nbufs) | |
803 | info.fragments = dmap->nbufs; | |
804 | ||
805 | info.fragsize = dmap->fragment_size; | |
806 | info.bytes = info.fragments * dmap->fragment_size; | |
807 | ||
808 | if (cmd == SNDCTL_DSP_GETISPACE && dmap->qlen) | |
809 | info.bytes -= dmap->counts[dmap->qhead]; | |
810 | else | |
811 | { | |
812 | info.fragments = info.bytes / dmap->fragment_size; | |
813 | info.bytes -= dmap->user_counter % dmap->fragment_size; | |
814 | } | |
815 | if (copy_to_user(arg, &info, sizeof(info))) | |
816 | return -EFAULT; | |
817 | return 0; | |
818 | ||
819 | case SNDCTL_DSP_SETTRIGGER: | |
820 | if (get_user(bits, (int __user *)arg)) | |
821 | return -EFAULT; | |
822 | bits &= audio_devs[dev]->open_mode; | |
823 | if (audio_devs[dev]->d->trigger == NULL) | |
824 | return -EINVAL; | |
825 | if (!(audio_devs[dev]->flags & DMA_DUPLEX) && (bits & PCM_ENABLE_INPUT) && | |
826 | (bits & PCM_ENABLE_OUTPUT)) | |
827 | return -EINVAL; | |
828 | ||
829 | if (bits & PCM_ENABLE_INPUT) | |
830 | { | |
831 | spin_lock_irqsave(&dmap_in->lock,flags); | |
832 | changed = (audio_devs[dev]->enable_bits ^ bits) & PCM_ENABLE_INPUT; | |
833 | if (changed && audio_devs[dev]->go) | |
834 | { | |
835 | reorganize_buffers(dev, dmap_in, 1); | |
836 | if ((err = audio_devs[dev]->d->prepare_for_input(dev, | |
837 | dmap_in->fragment_size, dmap_in->nbufs)) < 0) { | |
838 | spin_unlock_irqrestore(&dmap_in->lock,flags); | |
839 | return -err; | |
840 | } | |
841 | dmap_in->dma_mode = DMODE_INPUT; | |
842 | audio_devs[dev]->enable_bits |= PCM_ENABLE_INPUT; | |
843 | DMAbuf_activate_recording(dev, dmap_in); | |
844 | } else | |
845 | audio_devs[dev]->enable_bits &= ~PCM_ENABLE_INPUT; | |
846 | spin_unlock_irqrestore(&dmap_in->lock,flags); | |
847 | } | |
848 | if (bits & PCM_ENABLE_OUTPUT) | |
849 | { | |
850 | spin_lock_irqsave(&dmap_out->lock,flags); | |
851 | changed = (audio_devs[dev]->enable_bits ^ bits) & PCM_ENABLE_OUTPUT; | |
852 | if (changed && | |
853 | (dmap_out->mapping_flags & DMA_MAP_MAPPED || dmap_out->qlen > 0) && | |
854 | audio_devs[dev]->go) | |
855 | { | |
856 | if (!(dmap_out->flags & DMA_ALLOC_DONE)) | |
857 | reorganize_buffers(dev, dmap_out, 0); | |
858 | dmap_out->dma_mode = DMODE_OUTPUT; | |
859 | audio_devs[dev]->enable_bits |= PCM_ENABLE_OUTPUT; | |
860 | dmap_out->counts[dmap_out->qhead] = dmap_out->fragment_size; | |
861 | DMAbuf_launch_output(dev, dmap_out); | |
862 | } else | |
863 | audio_devs[dev]->enable_bits &= ~PCM_ENABLE_OUTPUT; | |
864 | spin_unlock_irqrestore(&dmap_out->lock,flags); | |
865 | } | |
866 | #if 0 | |
867 | if (changed && audio_devs[dev]->d->trigger) | |
868 | audio_devs[dev]->d->trigger(dev, bits * audio_devs[dev]->go); | |
869 | #endif | |
870 | /* Falls through... */ | |
871 | ||
872 | case SNDCTL_DSP_GETTRIGGER: | |
873 | ret = audio_devs[dev]->enable_bits; | |
874 | break; | |
875 | ||
876 | case SNDCTL_DSP_SETSYNCRO: | |
877 | if (!audio_devs[dev]->d->trigger) | |
878 | return -EINVAL; | |
879 | audio_devs[dev]->d->trigger(dev, 0); | |
880 | audio_devs[dev]->go = 0; | |
881 | return 0; | |
882 | ||
883 | case SNDCTL_DSP_GETIPTR: | |
884 | if (!(audio_devs[dev]->open_mode & OPEN_READ)) | |
885 | return -EINVAL; | |
886 | spin_lock_irqsave(&dmap_in->lock,flags); | |
887 | cinfo.bytes = dmap_in->byte_counter; | |
888 | cinfo.ptr = DMAbuf_get_buffer_pointer(dev, dmap_in, DMODE_INPUT) & ~3; | |
889 | if (cinfo.ptr < dmap_in->fragment_size && dmap_in->qtail != 0) | |
890 | cinfo.bytes += dmap_in->bytes_in_use; /* Pointer wrap not handled yet */ | |
891 | cinfo.blocks = dmap_in->qlen; | |
892 | cinfo.bytes += cinfo.ptr; | |
893 | if (dmap_in->mapping_flags & DMA_MAP_MAPPED) | |
894 | dmap_in->qlen = 0; /* Reset interrupt counter */ | |
895 | spin_unlock_irqrestore(&dmap_in->lock,flags); | |
896 | if (copy_to_user(arg, &cinfo, sizeof(cinfo))) | |
897 | return -EFAULT; | |
898 | return 0; | |
899 | ||
900 | case SNDCTL_DSP_GETOPTR: | |
901 | if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) | |
902 | return -EINVAL; | |
903 | ||
904 | spin_lock_irqsave(&dmap_out->lock,flags); | |
905 | cinfo.bytes = dmap_out->byte_counter; | |
906 | cinfo.ptr = DMAbuf_get_buffer_pointer(dev, dmap_out, DMODE_OUTPUT) & ~3; | |
907 | if (cinfo.ptr < dmap_out->fragment_size && dmap_out->qhead != 0) | |
908 | cinfo.bytes += dmap_out->bytes_in_use; /* Pointer wrap not handled yet */ | |
909 | cinfo.blocks = dmap_out->qlen; | |
910 | cinfo.bytes += cinfo.ptr; | |
911 | if (dmap_out->mapping_flags & DMA_MAP_MAPPED) | |
912 | dmap_out->qlen = 0; /* Reset interrupt counter */ | |
913 | spin_unlock_irqrestore(&dmap_out->lock,flags); | |
914 | if (copy_to_user(arg, &cinfo, sizeof(cinfo))) | |
915 | return -EFAULT; | |
916 | return 0; | |
917 | ||
918 | case SNDCTL_DSP_GETODELAY: | |
919 | if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) | |
920 | return -EINVAL; | |
921 | if (!(dmap_out->flags & DMA_ALLOC_DONE)) | |
922 | { | |
923 | ret=0; | |
924 | break; | |
925 | } | |
926 | spin_lock_irqsave(&dmap_out->lock,flags); | |
927 | /* Compute number of bytes that have been played */ | |
928 | count = DMAbuf_get_buffer_pointer (dev, dmap_out, DMODE_OUTPUT); | |
929 | if (count < dmap_out->fragment_size && dmap_out->qhead != 0) | |
930 | count += dmap_out->bytes_in_use; /* Pointer wrap not handled yet */ | |
931 | count += dmap_out->byte_counter; | |
932 | /* Substract current count from the number of bytes written by app */ | |
933 | count = dmap_out->user_counter - count; | |
934 | if (count < 0) | |
935 | count = 0; | |
936 | spin_unlock_irqrestore(&dmap_out->lock,flags); | |
937 | ret = count; | |
938 | break; | |
939 | ||
940 | case SNDCTL_DSP_POST: | |
941 | if (audio_devs[dev]->dmap_out->qlen > 0) | |
942 | if (!(audio_devs[dev]->dmap_out->flags & DMA_ACTIVE)) | |
943 | DMAbuf_launch_output(dev, audio_devs[dev]->dmap_out); | |
944 | return 0; | |
945 | ||
946 | case SNDCTL_DSP_GETBLKSIZE: | |
947 | dmap = dmap_out; | |
948 | if (audio_devs[dev]->open_mode & OPEN_WRITE) | |
949 | reorganize_buffers(dev, dmap_out, (audio_devs[dev]->open_mode == OPEN_READ)); | |
950 | if (audio_devs[dev]->open_mode == OPEN_READ || | |
951 | (audio_devs[dev]->flags & DMA_DUPLEX && | |
952 | audio_devs[dev]->open_mode & OPEN_READ)) | |
953 | reorganize_buffers(dev, dmap_in, (audio_devs[dev]->open_mode == OPEN_READ)); | |
954 | if (audio_devs[dev]->open_mode == OPEN_READ) | |
955 | dmap = dmap_in; | |
956 | ret = dmap->fragment_size; | |
957 | break; | |
958 | ||
959 | case SNDCTL_DSP_SETFRAGMENT: | |
960 | ret = 0; | |
961 | if (get_user(fact, (int __user *)arg)) | |
962 | return -EFAULT; | |
963 | if (audio_devs[dev]->open_mode & OPEN_WRITE) | |
964 | ret = dma_set_fragment(dev, dmap_out, fact); | |
965 | if (ret < 0) | |
966 | return ret; | |
967 | if (audio_devs[dev]->open_mode == OPEN_READ || | |
968 | (audio_devs[dev]->flags & DMA_DUPLEX && | |
969 | audio_devs[dev]->open_mode & OPEN_READ)) | |
970 | ret = dma_set_fragment(dev, dmap_in, fact); | |
971 | if (ret < 0) | |
972 | return ret; | |
973 | if (!arg) /* don't know what this is good for, but preserve old semantics */ | |
974 | return 0; | |
975 | break; | |
976 | ||
977 | default: | |
978 | if (!audio_devs[dev]->d->ioctl) | |
979 | return -EINVAL; | |
980 | return audio_devs[dev]->d->ioctl(dev, cmd, arg); | |
981 | } | |
982 | return put_user(ret, (int __user *)arg); | |
983 | } |