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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / media / radio / radio-cadet.c
blob16a089fad909f241f76d6f5a8a1eb8b22f9358bb
1 /* radio-cadet.c - A video4linux driver for the ADS Cadet AM/FM Radio Card
2 *
3 * by Fred Gleason <fredg@wava.com>
4 * Version 0.3.3
5 *
6 * (Loosely) based on code for the Aztech radio card by
7 *
8 * Russell Kroll (rkroll@exploits.org)
9 * Quay Ly
10 * Donald Song
11 * Jason Lewis (jlewis@twilight.vtc.vsc.edu)
12 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
13 * William McGrath (wmcgrath@twilight.vtc.vsc.edu)
14 *
15 * History:
16 * 2000-04-29 Russell Kroll <rkroll@exploits.org>
17 * Added ISAPnP detection for Linux 2.3/2.4
18 *
19 * 2001-01-10 Russell Kroll <rkroll@exploits.org>
20 * Removed dead CONFIG_RADIO_CADET_PORT code
21 * PnP detection on load is now default (no args necessary)
22 *
23 * 2002-01-17 Adam Belay <ambx1@neo.rr.com>
24 * Updated to latest pnp code
25 *
26 * 2003-01-31 Alan Cox <alan@lxorguk.ukuu.org.uk>
27 * Cleaned up locking, delay code, general odds and ends
28 *
29 * 2006-07-30 Hans J. Koch <koch@hjk-az.de>
30 * Changed API to V4L2
31 */
32
33 #include <linux/module.h> /* Modules */
34 #include <linux/init.h> /* Initdata */
35 #include <linux/ioport.h> /* request_region */
36 #include <linux/delay.h> /* udelay */
37 #include <linux/videodev2.h> /* V4L2 API defs */
38 #include <linux/param.h>
39 #include <linux/pnp.h>
40 #include <linux/sched.h>
41 #include <linux/io.h> /* outb, outb_p */
42 #include <media/v4l2-device.h>
43 #include <media/v4l2-ioctl.h>
44
45 MODULE_AUTHOR("Fred Gleason, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
46 MODULE_DESCRIPTION("A driver for the ADS Cadet AM/FM/RDS radio card.");
47 MODULE_LICENSE("GPL");
48 MODULE_VERSION("0.3.4");
49
50 static int io = -1; /* default to isapnp activation */
51 static int radio_nr = -1;
52
53 module_param(io, int, 0);
54 MODULE_PARM_DESC(io, "I/O address of Cadet card (0x330,0x332,0x334,0x336,0x338,0x33a,0x33c,0x33e)");
55 module_param(radio_nr, int, 0);
56
57 #define RDS_BUFFER 256
58 #define RDS_RX_FLAG 1
59 #define MBS_RX_FLAG 2
60
61 struct cadet {
62 struct v4l2_device v4l2_dev;
63 struct video_device vdev;
64 int io;
65 int users;
66 int curtuner;
67 int tunestat;
68 int sigstrength;
69 wait_queue_head_t read_queue;
70 struct timer_list readtimer;
71 __u8 rdsin, rdsout, rdsstat;
72 unsigned char rdsbuf[RDS_BUFFER];
73 struct mutex lock;
74 int reading;
75 };
76
77 static struct cadet cadet_card;
78
79 /*
80 * Signal Strength Threshold Values
81 * The V4L API spec does not define any particular unit for the signal
82 * strength value. These values are in microvolts of RF at the tuner's input.
83 */
84 static __u16 sigtable[2][4] = {
85 { 5, 10, 30, 150 },
86 { 28, 40, 63, 1000 }
87 };
88
89
90 static int cadet_getstereo(struct cadet *dev)
91 {
92 int ret = V4L2_TUNER_SUB_MONO;
93
94 if (dev->curtuner != 0) /* Only FM has stereo capability! */
95 return V4L2_TUNER_SUB_MONO;
96
97 mutex_lock(&dev->lock);
98 outb(7, dev->io); /* Select tuner control */
99 if ((inb(dev->io + 1) & 0x40) == 0)
100 ret = V4L2_TUNER_SUB_STEREO;
101 mutex_unlock(&dev->lock);
102 return ret;
103 }
104
105 static unsigned cadet_gettune(struct cadet *dev)
106 {
107 int curvol, i;
108 unsigned fifo = 0;
109
110 /*
111 * Prepare for read
112 */
113
114 mutex_lock(&dev->lock);
115
116 outb(7, dev->io); /* Select tuner control */
117 curvol = inb(dev->io + 1); /* Save current volume/mute setting */
118 outb(0x00, dev->io + 1); /* Ensure WRITE-ENABLE is LOW */
119 dev->tunestat = 0xffff;
120
121 /*
122 * Read the shift register
123 */
124 for (i = 0; i < 25; i++) {
125 fifo = (fifo << 1) | ((inb(dev->io + 1) >> 7) & 0x01);
126 if (i < 24) {
127 outb(0x01, dev->io + 1);
128 dev->tunestat &= inb(dev->io + 1);
129 outb(0x00, dev->io + 1);
130 }
131 }
132
133 /*
134 * Restore volume/mute setting
135 */
136 outb(curvol, dev->io + 1);
137 mutex_unlock(&dev->lock);
138
139 return fifo;
140 }
141
142 static unsigned cadet_getfreq(struct cadet *dev)
143 {
144 int i;
145 unsigned freq = 0, test, fifo = 0;
146
147 /*
148 * Read current tuning
149 */
150 fifo = cadet_gettune(dev);
151
152 /*
153 * Convert to actual frequency
154 */
155 if (dev->curtuner == 0) { /* FM */
156 test = 12500;
157 for (i = 0; i < 14; i++) {
158 if ((fifo & 0x01) != 0)
159 freq += test;
160 test = test << 1;
161 fifo = fifo >> 1;
162 }
163 freq -= 10700000; /* IF frequency is 10.7 MHz */
164 freq = (freq * 16) / 1000000; /* Make it 1/16 MHz */
165 }
166 if (dev->curtuner == 1) /* AM */
167 freq = ((fifo & 0x7fff) - 2010) * 16;
168
169 return freq;
170 }
171
172 static void cadet_settune(struct cadet *dev, unsigned fifo)
173 {
174 int i;
175 unsigned test;
176
177 mutex_lock(&dev->lock);
178
179 outb(7, dev->io); /* Select tuner control */
180 /*
181 * Write the shift register
182 */
183 test = 0;
184 test = (fifo >> 23) & 0x02; /* Align data for SDO */
185 test |= 0x1c; /* SDM=1, SWE=1, SEN=1, SCK=0 */
186 outb(7, dev->io); /* Select tuner control */
187 outb(test, dev->io + 1); /* Initialize for write */
188 for (i = 0; i < 25; i++) {
189 test |= 0x01; /* Toggle SCK High */
190 outb(test, dev->io + 1);
191 test &= 0xfe; /* Toggle SCK Low */
192 outb(test, dev->io + 1);
193 fifo = fifo << 1; /* Prepare the next bit */
194 test = 0x1c | ((fifo >> 23) & 0x02);
195 outb(test, dev->io + 1);
196 }
197 mutex_unlock(&dev->lock);
198 }
199
200 static void cadet_setfreq(struct cadet *dev, unsigned freq)
201 {
202 unsigned fifo;
203 int i, j, test;
204 int curvol;
205
206 /*
207 * Formulate a fifo command
208 */
209 fifo = 0;
210 if (dev->curtuner == 0) { /* FM */
211 test = 102400;
212 freq = (freq * 1000) / 16; /* Make it kHz */
213 freq += 10700; /* IF is 10700 kHz */
214 for (i = 0; i < 14; i++) {
215 fifo = fifo << 1;
216 if (freq >= test) {
217 fifo |= 0x01;
218 freq -= test;
219 }
220 test = test >> 1;
221 }
222 }
223 if (dev->curtuner == 1) { /* AM */
224 fifo = (freq / 16) + 2010; /* Make it kHz */
225 fifo |= 0x100000; /* Select AM Band */
226 }
227
228 /*
229 * Save current volume/mute setting
230 */
231
232 mutex_lock(&dev->lock);
233 outb(7, dev->io); /* Select tuner control */
234 curvol = inb(dev->io + 1);
235 mutex_unlock(&dev->lock);
236
237 /*
238 * Tune the card
239 */
240 for (j = 3; j > -1; j--) {
241 cadet_settune(dev, fifo | (j << 16));
242
243 mutex_lock(&dev->lock);
244 outb(7, dev->io); /* Select tuner control */
245 outb(curvol, dev->io + 1);
246 mutex_unlock(&dev->lock);
247
248 msleep(100);
249
250 cadet_gettune(dev);
251 if ((dev->tunestat & 0x40) == 0) { /* Tuned */
252 dev->sigstrength = sigtable[dev->curtuner][j];
253 return;
254 }
255 }
256 dev->sigstrength = 0;
257 }
258
259
260 static int cadet_getvol(struct cadet *dev)
261 {
262 int ret = 0;
263
264 mutex_lock(&dev->lock);
265
266 outb(7, dev->io); /* Select tuner control */
267 if ((inb(dev->io + 1) & 0x20) != 0)
268 ret = 0xffff;
269
270 mutex_unlock(&dev->lock);
271 return ret;
272 }
273
274
275 static void cadet_setvol(struct cadet *dev, int vol)
276 {
277 mutex_lock(&dev->lock);
278 outb(7, dev->io); /* Select tuner control */
279 if (vol > 0)
280 outb(0x20, dev->io + 1);
281 else
282 outb(0x00, dev->io + 1);
283 mutex_unlock(&dev->lock);
284 }
285
286 static void cadet_handler(unsigned long data)
287 {
288 struct cadet *dev = (void *)data;
289
290 /* Service the RDS fifo */
291 if (mutex_trylock(&dev->lock)) {
292 outb(0x3, dev->io); /* Select RDS Decoder Control */
293 if ((inb(dev->io + 1) & 0x20) != 0)
294 printk(KERN_CRIT "cadet: RDS fifo overflow\n");
295 outb(0x80, dev->io); /* Select RDS fifo */
296 while ((inb(dev->io) & 0x80) != 0) {
297 dev->rdsbuf[dev->rdsin] = inb(dev->io + 1);
298 if (dev->rdsin == dev->rdsout)
299 printk(KERN_WARNING "cadet: RDS buffer overflow\n");
300 else
301 dev->rdsin++;
302 }
303 mutex_unlock(&dev->lock);
304 }
305
306 /*
307 * Service pending read
308 */
309 if (dev->rdsin != dev->rdsout)
310 wake_up_interruptible(&dev->read_queue);
311
312 /*
313 * Clean up and exit
314 */
315 init_timer(&dev->readtimer);
316 dev->readtimer.function = cadet_handler;
317 dev->readtimer.data = (unsigned long)0;
318 dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
319 add_timer(&dev->readtimer);
320 }
321
322
323 static ssize_t cadet_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
324 {
325 struct cadet *dev = video_drvdata(file);
326 unsigned char readbuf[RDS_BUFFER];
327 int i = 0;
328
329 mutex_lock(&dev->lock);
330 if (dev->rdsstat == 0) {
331 dev->rdsstat = 1;
332 outb(0x80, dev->io); /* Select RDS fifo */
333 init_timer(&dev->readtimer);
334 dev->readtimer.function = cadet_handler;
335 dev->readtimer.data = (unsigned long)dev;
336 dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
337 add_timer(&dev->readtimer);
338 }
339 if (dev->rdsin == dev->rdsout) {
340 mutex_unlock(&dev->lock);
341 if (file->f_flags & O_NONBLOCK)
342 return -EWOULDBLOCK;
343 interruptible_sleep_on(&dev->read_queue);
344 mutex_lock(&dev->lock);
345 }
346 while (i < count && dev->rdsin != dev->rdsout)
347 readbuf[i++] = dev->rdsbuf[dev->rdsout++];
348 mutex_unlock(&dev->lock);
349
350 if (copy_to_user(data, readbuf, i))
351 return -EFAULT;
352 return i;
353 }
354
355
356 static int vidioc_querycap(struct file *file, void *priv,
357 struct v4l2_capability *v)
358 {
359 strlcpy(v->driver, "ADS Cadet", sizeof(v->driver));
360 strlcpy(v->card, "ADS Cadet", sizeof(v->card));
361 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
362 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
363 V4L2_CAP_READWRITE | V4L2_CAP_RDS_CAPTURE;
364 return 0;
365 }
366
367 static int vidioc_g_tuner(struct file *file, void *priv,
368 struct v4l2_tuner *v)
369 {
370 struct cadet *dev = video_drvdata(file);
371
372 v->type = V4L2_TUNER_RADIO;
373 switch (v->index) {
374 case 0:
375 strlcpy(v->name, "FM", sizeof(v->name));
376 v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS |
377 V4L2_TUNER_CAP_RDS_BLOCK_IO;
378 v->rangelow = 1400; /* 87.5 MHz */
379 v->rangehigh = 1728; /* 108.0 MHz */
380 v->rxsubchans = cadet_getstereo(dev);
381 switch (v->rxsubchans) {
382 case V4L2_TUNER_SUB_MONO:
383 v->audmode = V4L2_TUNER_MODE_MONO;
384 break;
385 case V4L2_TUNER_SUB_STEREO:
386 v->audmode = V4L2_TUNER_MODE_STEREO;
387 break;
388 default:
389 break;
390 }
391 v->rxsubchans |= V4L2_TUNER_SUB_RDS;
392 break;
393 case 1:
394 strlcpy(v->name, "AM", sizeof(v->name));
395 v->capability = V4L2_TUNER_CAP_LOW;
396 v->rangelow = 8320; /* 520 kHz */
397 v->rangehigh = 26400; /* 1650 kHz */
398 v->rxsubchans = V4L2_TUNER_SUB_MONO;
399 v->audmode = V4L2_TUNER_MODE_MONO;
400 break;
401 default:
402 return -EINVAL;
403 }
404 v->signal = dev->sigstrength; /* We might need to modify scaling of this */
405 return 0;
406 }
407
408 static int vidioc_s_tuner(struct file *file, void *priv,
409 struct v4l2_tuner *v)
410 {
411 struct cadet *dev = video_drvdata(file);
412
413 if (v->index != 0 && v->index != 1)
414 return -EINVAL;
415 dev->curtuner = v->index;
416 return 0;
417 }
418
419 static int vidioc_g_frequency(struct file *file, void *priv,
420 struct v4l2_frequency *f)
421 {
422 struct cadet *dev = video_drvdata(file);
423
424 f->tuner = dev->curtuner;
425 f->type = V4L2_TUNER_RADIO;
426 f->frequency = cadet_getfreq(dev);
427 return 0;
428 }
429
430
431 static int vidioc_s_frequency(struct file *file, void *priv,
432 struct v4l2_frequency *f)
433 {
434 struct cadet *dev = video_drvdata(file);
435
436 if (f->type != V4L2_TUNER_RADIO)
437 return -EINVAL;
438 if (dev->curtuner == 0 && (f->frequency < 1400 || f->frequency > 1728))
439 return -EINVAL;
440 if (dev->curtuner == 1 && (f->frequency < 8320 || f->frequency > 26400))
441 return -EINVAL;
442 cadet_setfreq(dev, f->frequency);
443 return 0;
444 }
445
446 static int vidioc_queryctrl(struct file *file, void *priv,
447 struct v4l2_queryctrl *qc)
448 {
449 switch (qc->id) {
450 case V4L2_CID_AUDIO_MUTE:
451 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
452 case V4L2_CID_AUDIO_VOLUME:
453 return v4l2_ctrl_query_fill(qc, 0, 0xff, 1, 0xff);
454 }
455 return -EINVAL;
456 }
457
458 static int vidioc_g_ctrl(struct file *file, void *priv,
459 struct v4l2_control *ctrl)
460 {
461 struct cadet *dev = video_drvdata(file);
462
463 switch (ctrl->id) {
464 case V4L2_CID_AUDIO_MUTE: /* TODO: Handle this correctly */
465 ctrl->value = (cadet_getvol(dev) == 0);
466 break;
467 case V4L2_CID_AUDIO_VOLUME:
468 ctrl->value = cadet_getvol(dev);
469 break;
470 default:
471 return -EINVAL;
472 }
473 return 0;
474 }
475
476 static int vidioc_s_ctrl(struct file *file, void *priv,
477 struct v4l2_control *ctrl)
478 {
479 struct cadet *dev = video_drvdata(file);
480
481 switch (ctrl->id){
482 case V4L2_CID_AUDIO_MUTE: /* TODO: Handle this correctly */
483 if (ctrl->value)
484 cadet_setvol(dev, 0);
485 else
486 cadet_setvol(dev, 0xffff);
487 break;
488 case V4L2_CID_AUDIO_VOLUME:
489 cadet_setvol(dev, ctrl->value);
490 break;
491 default:
492 return -EINVAL;
493 }
494 return 0;
495 }
496
497 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
498 {
499 *i = 0;
500 return 0;
501 }
502
503 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
504 {
505 return i ? -EINVAL : 0;
506 }
507
508 static int vidioc_g_audio(struct file *file, void *priv,
509 struct v4l2_audio *a)
510 {
511 a->index = 0;
512 strlcpy(a->name, "Radio", sizeof(a->name));
513 a->capability = V4L2_AUDCAP_STEREO;
514 return 0;
515 }
516
517 static int vidioc_s_audio(struct file *file, void *priv,
518 struct v4l2_audio *a)
519 {
520 return a->index ? -EINVAL : 0;
521 }
522
523 static int cadet_open(struct file *file)
524 {
525 struct cadet *dev = video_drvdata(file);
526
527 mutex_lock(&dev->lock);
528 dev->users++;
529 if (1 == dev->users)
530 init_waitqueue_head(&dev->read_queue);
531 mutex_unlock(&dev->lock);
532 return 0;
533 }
534
535 static int cadet_release(struct file *file)
536 {
537 struct cadet *dev = video_drvdata(file);
538
539 mutex_lock(&dev->lock);
540 dev->users--;
541 if (0 == dev->users) {
542 del_timer_sync(&dev->readtimer);
543 dev->rdsstat = 0;
544 }
545 mutex_unlock(&dev->lock);
546 return 0;
547 }
548
549 static unsigned int cadet_poll(struct file *file, struct poll_table_struct *wait)
550 {
551 struct cadet *dev = video_drvdata(file);
552
553 poll_wait(file, &dev->read_queue, wait);
554 if (dev->rdsin != dev->rdsout)
555 return POLLIN | POLLRDNORM;
556 return 0;
557 }
558
559
560 static const struct v4l2_file_operations cadet_fops = {
561 .owner = THIS_MODULE,
562 .open = cadet_open,
563 .release = cadet_release,
564 .read = cadet_read,
565 .unlocked_ioctl = video_ioctl2,
566 .poll = cadet_poll,
567 };
568
569 static const struct v4l2_ioctl_ops cadet_ioctl_ops = {
570 .vidioc_querycap = vidioc_querycap,
571 .vidioc_g_tuner = vidioc_g_tuner,
572 .vidioc_s_tuner = vidioc_s_tuner,
573 .vidioc_g_frequency = vidioc_g_frequency,
574 .vidioc_s_frequency = vidioc_s_frequency,
575 .vidioc_queryctrl = vidioc_queryctrl,
576 .vidioc_g_ctrl = vidioc_g_ctrl,
577 .vidioc_s_ctrl = vidioc_s_ctrl,
578 .vidioc_g_audio = vidioc_g_audio,
579 .vidioc_s_audio = vidioc_s_audio,
580 .vidioc_g_input = vidioc_g_input,
581 .vidioc_s_input = vidioc_s_input,
582 };
583
584 #ifdef CONFIG_PNP
585
586 static struct pnp_device_id cadet_pnp_devices[] = {
587 /* ADS Cadet AM/FM Radio Card */
588 {.id = "MSM0c24", .driver_data = 0},
589 {.id = ""}
590 };
591
592 MODULE_DEVICE_TABLE(pnp, cadet_pnp_devices);
593
594 static int cadet_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
595 {
596 if (!dev)
597 return -ENODEV;
598 /* only support one device */
599 if (io > 0)
600 return -EBUSY;
601
602 if (!pnp_port_valid(dev, 0))
603 return -ENODEV;
604
605 io = pnp_port_start(dev, 0);
606
607 printk(KERN_INFO "radio-cadet: PnP reports device at %#x\n", io);
608
609 return io;
610 }
611
612 static struct pnp_driver cadet_pnp_driver = {
613 .name = "radio-cadet",
614 .id_table = cadet_pnp_devices,
615 .probe = cadet_pnp_probe,
616 .remove = NULL,
617 };
618
619 #else
620 static struct pnp_driver cadet_pnp_driver;
621 #endif
622
623 static void cadet_probe(struct cadet *dev)
624 {
625 static int iovals[8] = { 0x330, 0x332, 0x334, 0x336, 0x338, 0x33a, 0x33c, 0x33e };
626 int i;
627
628 for (i = 0; i < 8; i++) {
629 dev->io = iovals[i];
630 if (request_region(dev->io, 2, "cadet-probe")) {
631 cadet_setfreq(dev, 1410);
632 if (cadet_getfreq(dev) == 1410) {
633 release_region(dev->io, 2);
634 return;
635 }
636 release_region(dev->io, 2);
637 }
638 }
639 dev->io = -1;
640 }
641
642 /*
643 * io should only be set if the user has used something like
644 * isapnp (the userspace program) to initialize this card for us
645 */
646
647 static int __init cadet_init(void)
648 {
649 struct cadet *dev = &cadet_card;
650 struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
651 int res;
652
653 strlcpy(v4l2_dev->name, "cadet", sizeof(v4l2_dev->name));
654 mutex_init(&dev->lock);
655
656 /* If a probe was requested then probe ISAPnP first (safest) */
657 if (io < 0)
658 pnp_register_driver(&cadet_pnp_driver);
659 dev->io = io;
660
661 /* If that fails then probe unsafely if probe is requested */
662 if (dev->io < 0)
663 cadet_probe(dev);
664
665 /* Else we bail out */
666 if (dev->io < 0) {
667 #ifdef MODULE
668 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x330, 0x332, 0x334,\n");
669 v4l2_err(v4l2_dev, "0x336, 0x338, 0x33a, 0x33c or 0x33e\n");
670 #endif
671 goto fail;
672 }
673 if (!request_region(dev->io, 2, "cadet"))
674 goto fail;
675
676 res = v4l2_device_register(NULL, v4l2_dev);
677 if (res < 0) {
678 release_region(dev->io, 2);
679 v4l2_err(v4l2_dev, "could not register v4l2_device\n");
680 goto fail;
681 }
682
683 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
684 dev->vdev.v4l2_dev = v4l2_dev;
685 dev->vdev.fops = &cadet_fops;
686 dev->vdev.ioctl_ops = &cadet_ioctl_ops;
687 dev->vdev.release = video_device_release_empty;
688 video_set_drvdata(&dev->vdev, dev);
689
690 if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
691 v4l2_device_unregister(v4l2_dev);
692 release_region(dev->io, 2);
693 goto fail;
694 }
695 v4l2_info(v4l2_dev, "ADS Cadet Radio Card at 0x%x\n", dev->io);
696 return 0;
697 fail:
698 pnp_unregister_driver(&cadet_pnp_driver);
699 return -ENODEV;
700 }
701
702 static void __exit cadet_exit(void)
703 {
704 struct cadet *dev = &cadet_card;
705
706 video_unregister_device(&dev->vdev);
707 v4l2_device_unregister(&dev->v4l2_dev);
708 release_region(dev->io, 2);
709 pnp_unregister_driver(&cadet_pnp_driver);
710 }
711
712 module_init(cadet_init);
713 module_exit(cadet_exit);
714