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V4L/DVB (3599a): Move drivers/usb/media to drivers/media/video
[mirror_ubuntu-artful-kernel.git] / drivers / media / video / se401.c
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1da177e4
LT		 1/*
2 * Endpoints (formerly known as AOX) se401 USB Camera Driver
3 *
4 * Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org)
5 *
6 * Still somewhat based on the Linux ov511 driver.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 *
23 * Thanks to Endpoints Inc. (www.endpoints.com) for making documentation on
24 * their chipset available and supporting me while writing this driver.
25 * - Jeroen Vreeken
26 */
27
28static const char version[] = "0.24";
29
30#include <linux/config.h>
31#include <linux/module.h>
32#include <linux/init.h>
33#include <linux/vmalloc.h>
34#include <linux/slab.h>
35#include <linux/pagemap.h>
36#include <linux/usb.h>
37#include "se401.h"
38
39static int flickerless=0;
40static int video_nr = -1;
41
42static struct usb_device_id device_table [] = {
43 { USB_DEVICE(0x03e8, 0x0004) },/* Endpoints/Aox SE401 */
44 { USB_DEVICE(0x0471, 0x030b) },/* Philips PCVC665K */
45 { USB_DEVICE(0x047d, 0x5001) },/* Kensington 67014 */
46 { USB_DEVICE(0x047d, 0x5002) },/* Kensington 6701(5/7) */
47 { USB_DEVICE(0x047d, 0x5003) },/* Kensington 67016 */
48 { }
49};
50
51MODULE_DEVICE_TABLE(usb, device_table);
52
53MODULE_AUTHOR("Jeroen Vreeken <pe1rxq@amsat.org>");
54MODULE_DESCRIPTION("SE401 USB Camera Driver");
55MODULE_LICENSE("GPL");
56module_param(flickerless, int, 0);
57MODULE_PARM_DESC(flickerless, "Net frequency to adjust exposure time to (0/50/60)");
58module_param(video_nr, int, 0);
59
60static struct usb_driver se401_driver;
61
62
63/**********************************************************************
64 *
65 * Memory management
66 *
67 **********************************************************************/
68static void *rvmalloc(unsigned long size)
69{
70 void *mem;
71 unsigned long adr;
72
73 size = PAGE_ALIGN(size);
74 mem = vmalloc_32(size);
75 if (!mem)
76 return NULL;
77
78 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
79 adr = (unsigned long) mem;
80 while (size > 0) {
81 SetPageReserved(vmalloc_to_page((void *)adr));
82 adr += PAGE_SIZE;
83 size -= PAGE_SIZE;
84 }
85
86 return mem;
87}
88
89static void rvfree(void *mem, unsigned long size)
90{
91 unsigned long adr;
92
93 if (!mem)
94 return;
95
96 adr = (unsigned long) mem;
97 while ((long) size > 0) {
98 ClearPageReserved(vmalloc_to_page((void *)adr));
99 adr += PAGE_SIZE;
100 size -= PAGE_SIZE;
101 }
102 vfree(mem);
103}
104
105
106
107/****************************************************************************
108 *
109 * se401 register read/write functions
110 *
111 ***************************************************************************/
112
113static int se401_sndctrl(int set, struct usb_se401 *se401, unsigned short req,
114 unsigned short value, unsigned char *cp, int size)
115{
116 return usb_control_msg (
117 se401->dev,
118 set ? usb_sndctrlpipe(se401->dev, 0) : usb_rcvctrlpipe(se401->dev, 0),
119 req,
120 (set ? USB_DIR_OUT : USB_DIR_IN) | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
121 value,
122 0,
123 cp,
124 size,
125 1000
126 );
127}
128
129static int se401_set_feature(struct usb_se401 *se401, unsigned short selector,
130 unsigned short param)
131{
132 /* specs say that the selector (address) should go in the value field
133 and the param in index, but in the logs of the windows driver they do
134 this the other way around...
135 */
136 return usb_control_msg (
137 se401->dev,
138 usb_sndctrlpipe(se401->dev, 0),
139 SE401_REQ_SET_EXT_FEATURE,
140 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
141 param,
142 selector,
143 NULL,
144 0,
145 1000
146 );
147}
148
149static unsigned short se401_get_feature(struct usb_se401 *se401,
150 unsigned short selector)
151{
152 /* For 'set' the selecetor should be in index, not sure if the spec is
153 wrong here to....
154 */
155 unsigned char cp[2];
156 usb_control_msg (
157 se401->dev,
158 usb_rcvctrlpipe(se401->dev, 0),
159 SE401_REQ_GET_EXT_FEATURE,
160 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
161 0,
162 selector,
163 cp,
164 2,
165 1000
166 );
167 return cp[0]+cp[1]*256;
168}
169
170/****************************************************************************
171 *
172 * Camera control
173 *
174 ***************************************************************************/
175
176
177static int se401_send_pict(struct usb_se401 *se401)
178{
179 se401_set_feature(se401, HV7131_REG_TITL, se401->expose_l);/* integration time low */
180 se401_set_feature(se401, HV7131_REG_TITM, se401->expose_m);/* integration time mid */
181 se401_set_feature(se401, HV7131_REG_TITU, se401->expose_h);/* integration time mid */
182 se401_set_feature(se401, HV7131_REG_ARLV, se401->resetlevel);/* reset level value */
183 se401_set_feature(se401, HV7131_REG_ARCG, se401->rgain);/* red color gain */
184 se401_set_feature(se401, HV7131_REG_AGCG, se401->ggain);/* green color gain */
185 se401_set_feature(se401, HV7131_REG_ABCG, se401->bgain);/* blue color gain */
186
187 return 0;
188}
189
190static void se401_set_exposure(struct usb_se401 *se401, int brightness)
191{
192 int integration=brightness<<5;
193
194 if (flickerless==50) {
195 integration=integration-integration%106667;
196 }
197 if (flickerless==60) {
198 integration=integration-integration%88889;
199 }
200 se401->brightness=integration>>5;
201 se401->expose_h=(integration>>16)&0xff;
202 se401->expose_m=(integration>>8)&0xff;
203 se401->expose_l=integration&0xff;
204}
205
206static int se401_get_pict(struct usb_se401 *se401, struct video_picture *p)
207{
208 p->brightness=se401->brightness;
209 if (se401->enhance) {
210 p->whiteness=32768;
211 } else {
212 p->whiteness=0;
213 }
214 p->colour=65535;
215 p->contrast=65535;
216 p->hue=se401->rgain<<10;
217 p->palette=se401->palette;
218 p->depth=3; /* rgb24 */
219 return 0;
220}
221
222
223static int se401_set_pict(struct usb_se401 *se401, struct video_picture *p)
224{
225 if (p->palette != VIDEO_PALETTE_RGB24)
226 return 1;
227 se401->palette=p->palette;
228 if (p->hue!=se401->hue) {
229 se401->rgain= p->hue>>10;
230 se401->bgain= 0x40-(p->hue>>10);
231 se401->hue=p->hue;
232 }
233 if (p->brightness!=se401->brightness) {
234 se401_set_exposure(se401, p->brightness);
235 }
236 if (p->whiteness>=32768) {
237 se401->enhance=1;
238 } else {
239 se401->enhance=0;
240 }
241 se401_send_pict(se401);
242 se401_send_pict(se401);
243 return 0;
244}
245
246/*
247 Hyundai have some really nice docs about this and other sensor related
248 stuff on their homepage: www.hei.co.kr
249*/
250static void se401_auto_resetlevel(struct usb_se401 *se401)
251{
252 unsigned int ahrc, alrc;
253 int oldreset=se401->resetlevel;
254
255 /* For some reason this normally read-only register doesn't get reset
256 to zero after reading them just once...
257 */
258 se401_get_feature(se401, HV7131_REG_HIREFNOH);
259 se401_get_feature(se401, HV7131_REG_HIREFNOL);
260 se401_get_feature(se401, HV7131_REG_LOREFNOH);
261 se401_get_feature(se401, HV7131_REG_LOREFNOL);
262 ahrc=256*se401_get_feature(se401, HV7131_REG_HIREFNOH) +
263 se401_get_feature(se401, HV7131_REG_HIREFNOL);
264 alrc=256*se401_get_feature(se401, HV7131_REG_LOREFNOH) +
265 se401_get_feature(se401, HV7131_REG_LOREFNOL);
266
267 /* Not an exact science, but it seems to work pretty well... */
268 if (alrc > 10) {
269 while (alrc>=10 && se401->resetlevel < 63) {
270 se401->resetlevel++;
271 alrc /=2;
272 }
273 } else if (ahrc > 20) {
274 while (ahrc>=20 && se401->resetlevel > 0) {
275 se401->resetlevel--;
276 ahrc /=2;
277 }
278 }
279 if (se401->resetlevel!=oldreset)
280 se401_set_feature(se401, HV7131_REG_ARLV, se401->resetlevel);
281
282 return;
283}
284
285/* irq handler for snapshot button */
286static void se401_button_irq(struct urb *urb, struct pt_regs *regs)
287{
288 struct usb_se401 *se401 = urb->context;
289 int status;
290
291 if (!se401->dev) {
292 info("ohoh: device vapourished");
293 return;
294 }
295
296 switch (urb->status) {
297 case 0:
298 /* success */
299 break;
300 case -ECONNRESET:
301 case -ENOENT:
302 case -ESHUTDOWN:
303 /* this urb is terminated, clean up */
304 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
305 return;
306 default:
307 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
308 goto exit;
309 }
310
311 if (urb->actual_length >=2) {
312 if (se401->button)
313 se401->buttonpressed=1;
314 }
315exit:
316 status = usb_submit_urb (urb, GFP_ATOMIC);
317 if (status)
318 err ("%s - usb_submit_urb failed with result %d",
319 __FUNCTION__, status);
320}
321
322static void se401_video_irq(struct urb *urb, struct pt_regs *regs)
323{
324 struct usb_se401 *se401 = urb->context;
325 int length = urb->actual_length;
326
327 /* ohoh... */
328 if (!se401->streaming)
329 return;
330
331 if (!se401->dev) {
332 info ("ohoh: device vapourished");
333 return;
334 }
335
336 /* 0 sized packets happen if we are to fast, but sometimes the camera
337 keeps sending them forever...
338 */
339 if (length && !urb->status) {
340 se401->nullpackets=0;
341 switch(se401->scratch[se401->scratch_next].state) {
342 case BUFFER_READY:
343 case BUFFER_BUSY: {
344 se401->dropped++;
345 break;
346 }
347 case BUFFER_UNUSED: {
348 memcpy(se401->scratch[se401->scratch_next].data, (unsigned char *)urb->transfer_buffer, length);
349 se401->scratch[se401->scratch_next].state=BUFFER_READY;
350 se401->scratch[se401->scratch_next].offset=se401->bayeroffset;
351 se401->scratch[se401->scratch_next].length=length;
352 if (waitqueue_active(&se401->wq)) {
353 wake_up_interruptible(&se401->wq);
354 }
355 se401->scratch_overflow=0;
356 se401->scratch_next++;
357 if (se401->scratch_next>=SE401_NUMSCRATCH)
358 se401->scratch_next=0;
359 break;
360 }
361 }
362 se401->bayeroffset+=length;
363 if (se401->bayeroffset>=se401->cheight*se401->cwidth) {
364 se401->bayeroffset=0;
365 }
366 } else {
367 se401->nullpackets++;
368 if (se401->nullpackets > SE401_MAX_NULLPACKETS) {
369 if (waitqueue_active(&se401->wq)) {
370 wake_up_interruptible(&se401->wq);
371 }
372 }
373 }
374
375 /* Resubmit urb for new data */
376 urb->status=0;
377 urb->dev=se401->dev;
378 if(usb_submit_urb(urb, GFP_KERNEL))
379 info("urb burned down");
380 return;
381}
382
383static void se401_send_size(struct usb_se401 *se401, int width, int height)
384{
385 int i=0;
386 int mode=0x03; /* No compression */
387 int sendheight=height;
388 int sendwidth=width;
389
390 /* JangGu compression can only be used with the camera supported sizes,
391 but bayer seems to work with any size that fits on the sensor.
392 We check if we can use compression with the current size with either
393 4 or 16 times subcapturing, if not we use uncompressed bayer data
394 but this will result in cutouts of the maximum size....
395 */
396 while (i<se401->sizes && !(se401->width[i]==width && se401->height[i]==height))
397 i++;
398 while (i<se401->sizes) {
399 if (se401->width[i]==width*2 && se401->height[i]==height*2) {
400 sendheight=se401->height[i];
401 sendwidth=se401->width[i];
402 mode=0x40;
403 }
404 if (se401->width[i]==width*4 && se401->height[i]==height*4) {
405 sendheight=se401->height[i];
406 sendwidth=se401->width[i];
407 mode=0x42;
408 }
409 i++;
410 }
411
412 se401_sndctrl(1, se401, SE401_REQ_SET_WIDTH, sendwidth, NULL, 0);
413 se401_sndctrl(1, se401, SE401_REQ_SET_HEIGHT, sendheight, NULL, 0);
414 se401_set_feature(se401, SE401_OPERATINGMODE, mode);
415
416 if (mode==0x03) {
417 se401->format=FMT_BAYER;
418 } else {
419 se401->format=FMT_JANGGU;
420 }
421
422 return;
423}
424
425/*
426 In this function se401_send_pict is called several times,
427 for some reason (depending on the state of the sensor and the phase of
428 the moon :) doing this only in either place doesn't always work...
429*/
430static int se401_start_stream(struct usb_se401 *se401)
431{
432 struct urb *urb;
433 int err=0, i;
434 se401->streaming=1;
435
436 se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 1, NULL, 0);
437 se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 1, NULL, 0);
438
439 /* Set picture settings */
440 se401_set_feature(se401, HV7131_REG_MODE_B, 0x05);/*windowed + pix intg */
441 se401_send_pict(se401);
442
443 se401_send_size(se401, se401->cwidth, se401->cheight);
444
445 se401_sndctrl(1, se401, SE401_REQ_START_CONTINUOUS_CAPTURE, 0, NULL, 0);
446
447 /* Do some memory allocation */
448 for (i=0; i<SE401_NUMFRAMES; i++) {
449 se401->frame[i].data=se401->fbuf + i * se401->maxframesize;
450 se401->frame[i].curpix=0;
451 }
452 for (i=0; i<SE401_NUMSBUF; i++) {
453 se401->sbuf[i].data=kmalloc(SE401_PACKETSIZE, GFP_KERNEL);
454 }
455
456 se401->bayeroffset=0;
457 se401->scratch_next=0;
458 se401->scratch_use=0;
459 se401->scratch_overflow=0;
460 for (i=0; i<SE401_NUMSCRATCH; i++) {
461 se401->scratch[i].data=kmalloc(SE401_PACKETSIZE, GFP_KERNEL);
462 se401->scratch[i].state=BUFFER_UNUSED;
463 }
464
465 for (i=0; i<SE401_NUMSBUF; i++) {
466 urb=usb_alloc_urb(0, GFP_KERNEL);
467 if(!urb)
468 return -ENOMEM;
469
470 usb_fill_bulk_urb(urb, se401->dev,
471 usb_rcvbulkpipe(se401->dev, SE401_VIDEO_ENDPOINT),
472 se401->sbuf[i].data, SE401_PACKETSIZE,
473 se401_video_irq,
474 se401);
475
476 se401->urb[i]=urb;
477
478 err=usb_submit_urb(se401->urb[i], GFP_KERNEL);
479 if(err)
480 err("urb burned down");
481 }
482
483 se401->framecount=0;
484
485 return 0;
486}
487
488static int se401_stop_stream(struct usb_se401 *se401)
489{
490 int i;
491
492 if (!se401->streaming || !se401->dev)
493 return 1;
494
495 se401->streaming=0;
496
497 se401_sndctrl(1, se401, SE401_REQ_STOP_CONTINUOUS_CAPTURE, 0, NULL, 0);
498
499 se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 0, NULL, 0);
500 se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 0, NULL, 0);
501
502 for (i=0; i<SE401_NUMSBUF; i++) if (se401->urb[i]) {
503 usb_kill_urb(se401->urb[i]);
504 usb_free_urb(se401->urb[i]);
505 se401->urb[i]=NULL;
506 kfree(se401->sbuf[i].data);
507 }
508 for (i=0; i<SE401_NUMSCRATCH; i++) {
509 kfree(se401->scratch[i].data);
510 se401->scratch[i].data=NULL;
511 }
512
513 return 0;
514}
515
516static int se401_set_size(struct usb_se401 *se401, int width, int height)
517{
518 int wasstreaming=se401->streaming;
519 /* Check to see if we need to change */
520 if (se401->cwidth==width && se401->cheight==height)
521 return 0;
522
523 /* Check for a valid mode */
524 if (!width || !height)
525 return 1;
526 if ((width & 1) || (height & 1))
527 return 1;
528 if (width>se401->width[se401->sizes-1])
529 return 1;
530 if (height>se401->height[se401->sizes-1])
531 return 1;
532
533 /* Stop a current stream and start it again at the new size */
534 if (wasstreaming)
535 se401_stop_stream(se401);
536 se401->cwidth=width;
537 se401->cheight=height;
538 if (wasstreaming)
539 se401_start_stream(se401);
540 return 0;
541}
542
543
544/****************************************************************************
545 *
546 * Video Decoding
547 *
548 ***************************************************************************/
549
550/*
551 This shouldn't really be done in a v4l driver....
552 But it does make the image look a lot more usable.
553 Basically it lifts the dark pixels more than the light pixels.
554*/
555static inline void enhance_picture(unsigned char *frame, int len)
556{
557 while (len--) {
558 *frame=(((*frame^255)*(*frame^255))/255)^255;
559 frame++;
560 }
561}
562
563static inline void decode_JangGu_integrate(struct usb_se401 *se401, int data)
564{
565 struct se401_frame *frame=&se401->frame[se401->curframe];
566 int linelength=se401->cwidth*3;
567
568 if (frame->curlinepix >= linelength) {
569 frame->curlinepix=0;
570 frame->curline+=linelength;
571 }
572
573 /* First three are absolute, all others relative.
574 * Format is rgb from right to left (mirrorred image),
575 * we flip it to get bgr from left to right. */
576 if (frame->curlinepix < 3) {
577 *(frame->curline-frame->curlinepix)=1+data*4;
578 } else {
579 *(frame->curline-frame->curlinepix)=
580 *(frame->curline-frame->curlinepix+3)+data*4;
581 }
582 frame->curlinepix++;
583}
584
585static inline void decode_JangGu_vlc (struct usb_se401 *se401, unsigned char *data, int bit_exp, int packetlength)
586{
587 int pos=0;
588 int vlc_cod=0;
589 int vlc_size=0;
590 int vlc_data=0;
591 int bit_cur;
592 int bit;
593 data+=4;
594 while (pos < packetlength) {
595 bit_cur=8;
596 while (bit_cur && bit_exp) {
597 bit=((*data)>>(bit_cur-1))&1;
598 if (!vlc_cod) {
599 if (bit) {
600 vlc_size++;
601 } else {
602 if (!vlc_size) {
603 decode_JangGu_integrate(se401, 0);
604 } else {
605 vlc_cod=2;
606 vlc_data=0;
607 }
608 }
609 } else {
610 if (vlc_cod==2) {
611 if (!bit)
612 vlc_data = -(1<<vlc_size) + 1;
613 vlc_cod--;
614 }
615 vlc_size--;
616 vlc_data+=bit<<vlc_size;
617 if (!vlc_size) {
618 decode_JangGu_integrate(se401, vlc_data);
619 vlc_cod=0;
620 }
621 }
622 bit_cur--;
623 bit_exp--;
624 }
625 pos++;
626 data++;
627 }
628}
629
630static inline void decode_JangGu (struct usb_se401 *se401, struct se401_scratch *buffer)
631{
632 unsigned char *data=buffer->data;
633 int len=buffer->length;
634 int bit_exp=0, pix_exp=0, frameinfo=0, packetlength=0, size;
635 int datapos=0;
636
637 /* New image? */
638 if (!se401->frame[se401->curframe].curpix) {
639 se401->frame[se401->curframe].curlinepix=0;
640 se401->frame[se401->curframe].curline=
641 se401->frame[se401->curframe].data+
642 se401->cwidth*3-1;
643 if (se401->frame[se401->curframe].grabstate==FRAME_READY)
644 se401->frame[se401->curframe].grabstate=FRAME_GRABBING;
645 se401->vlcdatapos=0;
646 }
647 while (datapos < len) {
648 size=1024-se401->vlcdatapos;
649 if (size+datapos > len)
650 size=len-datapos;
651 memcpy(se401->vlcdata+se401->vlcdatapos, data+datapos, size);
652 se401->vlcdatapos+=size;
653 packetlength=0;
654 if (se401->vlcdatapos >= 4) {
655 bit_exp=se401->vlcdata[3]+(se401->vlcdata[2]<<8);
656 pix_exp=se401->vlcdata[1]+((se401->vlcdata[0]&0x3f)<<8);
657 frameinfo=se401->vlcdata[0]&0xc0;
658 packetlength=((bit_exp+47)>>4)<<1;
659 if (packetlength > 1024) {
660 se401->vlcdatapos=0;
661 datapos=len;
662 packetlength=0;
663 se401->error++;
664 se401->frame[se401->curframe].curpix=0;
665 }
666 }
667 if (packetlength && se401->vlcdatapos >= packetlength) {
668 decode_JangGu_vlc(se401, se401->vlcdata, bit_exp, packetlength);
669 se401->frame[se401->curframe].curpix+=pix_exp*3;
670 datapos+=size-(se401->vlcdatapos-packetlength);
671 se401->vlcdatapos=0;
672 if (se401->frame[se401->curframe].curpix>=se401->cwidth*se401->cheight*3) {
673 if (se401->frame[se401->curframe].curpix==se401->cwidth*se401->cheight*3) {
674 if (se401->frame[se401->curframe].grabstate==FRAME_GRABBING) {
675 se401->frame[se401->curframe].grabstate=FRAME_DONE;
676 se401->framecount++;
677 se401->readcount++;
678 }
679 if (se401->frame[(se401->curframe+1)&(SE401_NUMFRAMES-1)].grabstate==FRAME_READY) {
680 se401->curframe=(se401->curframe+1) & (SE401_NUMFRAMES-1);
681 }
682 } else {
683 se401->error++;
684 }
685 se401->frame[se401->curframe].curpix=0;
686 datapos=len;
687 }
688 } else {
689 datapos+=size;
690 }
691 }
692}
693
694static inline void decode_bayer (struct usb_se401 *se401, struct se401_scratch *buffer)
695{
696 unsigned char *data=buffer->data;
697 int len=buffer->length;
698 int offset=buffer->offset;
699 int datasize=se401->cwidth*se401->cheight;
700 struct se401_frame *frame=&se401->frame[se401->curframe];
701
702 unsigned char *framedata=frame->data, *curline, *nextline;
703 int width=se401->cwidth;
704 int blineoffset=0, bline;
705 int linelength=width*3, i;
706
707
708 if (frame->curpix==0) {
709 if (frame->grabstate==FRAME_READY) {
710 frame->grabstate=FRAME_GRABBING;
711 }
712 frame->curline=framedata+linelength;
713 frame->curlinepix=0;
714 }
715
716 if (offset!=frame->curpix) {
717 /* Regard frame as lost :( */
718 frame->curpix=0;
719 se401->error++;
720 return;
721 }
722
723 /* Check if we have to much data */
724 if (frame->curpix+len > datasize) {
725 len=datasize-frame->curpix;
726 }
727 if (se401->cheight%4)
728 blineoffset=1;
729 bline=frame->curpix/se401->cwidth+blineoffset;
730
731 curline=frame->curline;
732 nextline=curline+linelength;
733 if (nextline >= framedata+datasize*3)
734 nextline=curline;
735 while (len) {
736 if (frame->curlinepix>=width) {
737 frame->curlinepix-=width;
738 bline=frame->curpix/width+blineoffset;
739 curline+=linelength*2;
740 nextline+=linelength*2;
741 if (curline >= framedata+datasize*3) {
742 frame->curlinepix++;
743 curline-=3;
744 nextline-=3;
745 len--;
746 data++;
747 frame->curpix++;
748 }
749 if (nextline >= framedata+datasize*3)
750 nextline=curline;
751 }
752 if ((bline&1)) {
753 if ((frame->curlinepix&1)) {
754 *(curline+2)=*data;
755 *(curline-1)=*data;
756 *(nextline+2)=*data;
757 *(nextline-1)=*data;
758 } else {
759 *(curline+1)=
760 (*(curline+1)+*data)/2;
761 *(curline-2)=
762 (*(curline-2)+*data)/2;
763 *(nextline+1)=*data;
764 *(nextline-2)=*data;
765 }
766 } else {
767 if ((frame->curlinepix&1)) {
768 *(curline+1)=
769 (*(curline+1)+*data)/2;
770 *(curline-2)=
771 (*(curline-2)+*data)/2;
772 *(nextline+1)=*data;
773 *(nextline-2)=*data;
774 } else {
775 *curline=*data;
776 *(curline-3)=*data;
777 *nextline=*data;
778 *(nextline-3)=*data;
779 }
780 }
781 frame->curlinepix++;
782 curline-=3;
783 nextline-=3;
784 len--;
785 data++;
786 frame->curpix++;
787 }
788 frame->curline=curline;
789
790 if (frame->curpix>=datasize) {
791 /* Fix the top line */
792 framedata+=linelength;
793 for (i=0; i<linelength; i++) {
794 framedata--;
795 *framedata=*(framedata+linelength);
796 }
797 /* Fix the left side (green is already present) */
798 for (i=0; i<se401->cheight; i++) {
799 *framedata=*(framedata+3);
800 *(framedata+1)=*(framedata+4);
801 *(framedata+2)=*(framedata+5);
802 framedata+=linelength;
803 }
804 frame->curpix=0;
805 frame->grabstate=FRAME_DONE;
806 se401->framecount++;
807 se401->readcount++;
808 if (se401->frame[(se401->curframe+1)&(SE401_NUMFRAMES-1)].grabstate==FRAME_READY) {
809 se401->curframe=(se401->curframe+1) & (SE401_NUMFRAMES-1);
810 }
811 }
812}
813
814static int se401_newframe(struct usb_se401 *se401, int framenr)
815{
816 DECLARE_WAITQUEUE(wait, current);
817 int errors=0;
818
819 while (se401->streaming &&
820 (se401->frame[framenr].grabstate==FRAME_READY ||
821 se401->frame[framenr].grabstate==FRAME_GRABBING) ) {
822 if(!se401->frame[framenr].curpix) {
823 errors++;
824 }
825 wait_interruptible(
826 se401->scratch[se401->scratch_use].state!=BUFFER_READY,
827 &se401->wq,
828 &wait
829 );
830 if (se401->nullpackets > SE401_MAX_NULLPACKETS) {
831 se401->nullpackets=0;
832 info("to many null length packets, restarting capture");
833 se401_stop_stream(se401);
834 se401_start_stream(se401);
835 } else {
836 if (se401->scratch[se401->scratch_use].state!=BUFFER_READY) {
837 se401->frame[framenr].grabstate=FRAME_ERROR;
838 return -EIO;
839 }
840 se401->scratch[se401->scratch_use].state=BUFFER_BUSY;
841 if (se401->format==FMT_JANGGU) {
842 decode_JangGu(se401, &se401->scratch[se401->scratch_use]);
843 } else {
844 decode_bayer(se401, &se401->scratch[se401->scratch_use]);
845 }
846 se401->scratch[se401->scratch_use].state=BUFFER_UNUSED;
847 se401->scratch_use++;
848 if (se401->scratch_use>=SE401_NUMSCRATCH)
849 se401->scratch_use=0;
850 if (errors > SE401_MAX_ERRORS) {
851 errors=0;
852 info("to much errors, restarting capture");
853 se401_stop_stream(se401);
854 se401_start_stream(se401);
855 }
856 }
857 }
858
859 if (se401->frame[framenr].grabstate==FRAME_DONE)
860 if (se401->enhance)
861 enhance_picture(se401->frame[framenr].data, se401->cheight*se401->cwidth*3);
862 return 0;
863}
864
865static void usb_se401_remove_disconnected (struct usb_se401 *se401)
866{
867 int i;
868
869 se401->dev = NULL;
870
1bc3c9e1
JJ		 871 for (i=0; i<SE401_NUMSBUF; i++)
872 if (se401->urb[i]) {
873 usb_kill_urb(se401->urb[i]);
874 usb_free_urb(se401->urb[i]);
875 se401->urb[i] = NULL;
876 kfree(se401->sbuf[i].data);
877 }
878 for (i=0; i<SE401_NUMSCRATCH; i++) {
1da177e4
LT		 879 kfree(se401->scratch[i].data);
880 }
881 if (se401->inturb) {
882 usb_kill_urb(se401->inturb);
883 usb_free_urb(se401->inturb);
884 }
885 info("%s disconnected", se401->camera_name);
886
887 /* Free the memory */
888 kfree(se401->width);
889 kfree(se401->height);
890 kfree(se401);
891}
892
893
894
895/****************************************************************************
896 *
897 * Video4Linux
898 *
899 ***************************************************************************/
900
901
902static int se401_open(struct inode *inode, struct file *file)
903{
904 struct video_device *dev = video_devdata(file);
905 struct usb_se401 *se401 = (struct usb_se401 *)dev;
906 int err = 0;
907
908 if (se401->user)
909 return -EBUSY;
910 se401->fbuf = rvmalloc(se401->maxframesize * SE401_NUMFRAMES);
911 if (se401->fbuf)
912 file->private_data = dev;
913 else
914 err = -ENOMEM;
915 se401->user = !err;
916
917 return err;
918}
919
920static int se401_close(struct inode *inode, struct file *file)
921{
922 struct video_device *dev = file->private_data;
923 struct usb_se401 *se401 = (struct usb_se401 *)dev;
924 int i;
925
926 rvfree(se401->fbuf, se401->maxframesize * SE401_NUMFRAMES);
927 if (se401->removed) {
928 usb_se401_remove_disconnected(se401);
929 info("device unregistered");
930 } else {
931 for (i=0; i<SE401_NUMFRAMES; i++)
932 se401->frame[i].grabstate=FRAME_UNUSED;
933 if (se401->streaming)
934 se401_stop_stream(se401);
935 se401->user=0;
936 }
937 file->private_data = NULL;
938 return 0;
939}
940
941static int se401_do_ioctl(struct inode *inode, struct file *file,
942 unsigned int cmd, void *arg)
943{
944 struct video_device *vdev = file->private_data;
945 struct usb_se401 *se401 = (struct usb_se401 *)vdev;
946
947 if (!se401->dev)
948 return -EIO;
949
950 switch (cmd) {
951 case VIDIOCGCAP:
952 {
953 struct video_capability *b = arg;
954 strcpy(b->name, se401->camera_name);
955 b->type = VID_TYPE_CAPTURE;
956 b->channels = 1;
957 b->audios = 0;
958 b->maxwidth = se401->width[se401->sizes-1];
959 b->maxheight = se401->height[se401->sizes-1];
960 b->minwidth = se401->width[0];
961 b->minheight = se401->height[0];
962 return 0;
963 }
964 case VIDIOCGCHAN:
965 {
966 struct video_channel *v = arg;
967
968 if (v->channel != 0)
969 return -EINVAL;
970 v->flags = 0;
971 v->tuners = 0;
972 v->type = VIDEO_TYPE_CAMERA;
973 strcpy(v->name, "Camera");
974 return 0;
975 }
976 case VIDIOCSCHAN:
977 {
978 struct video_channel *v = arg;
979
980 if (v->channel != 0)
981 return -EINVAL;
982 return 0;
983 }
984 case VIDIOCGPICT:
985 {
986 struct video_picture *p = arg;
987
988 se401_get_pict(se401, p);
989 return 0;
990 }
991 case VIDIOCSPICT:
992 {
993 struct video_picture *p = arg;
994
995 if (se401_set_pict(se401, p))
996 return -EINVAL;
997 return 0;
998 }
999 case VIDIOCSWIN:
1000 {
1001 struct video_window *vw = arg;
1002
1003 if (vw->flags)
1004 return -EINVAL;
1005 if (vw->clipcount)
1006 return -EINVAL;
1007 if (se401_set_size(se401, vw->width, vw->height))
1008 return -EINVAL;
1009 return 0;
1010 }
1011 case VIDIOCGWIN:
1012 {
1013 struct video_window *vw = arg;
1014
1015 vw->x = 0; /* FIXME */
1016 vw->y = 0;
1017 vw->chromakey = 0;
1018 vw->flags = 0;
1019 vw->clipcount = 0;
1020 vw->width = se401->cwidth;
1021 vw->height = se401->cheight;
1022 return 0;
1023 }
1024 case VIDIOCGMBUF:
1025 {
1026 struct video_mbuf *vm = arg;
1027 int i;
1028
1029 memset(vm, 0, sizeof(*vm));
1030 vm->size = SE401_NUMFRAMES * se401->maxframesize;
1031 vm->frames = SE401_NUMFRAMES;
1032 for (i=0; i<SE401_NUMFRAMES; i++)
1033 vm->offsets[i] = se401->maxframesize * i;
1034 return 0;
1035 }
1036 case VIDIOCMCAPTURE:
1037 {
1038 struct video_mmap *vm = arg;
1039
1040 if (vm->format != VIDEO_PALETTE_RGB24)
1041 return -EINVAL;
1042 if (vm->frame >= SE401_NUMFRAMES)
1043 return -EINVAL;
1044 if (se401->frame[vm->frame].grabstate != FRAME_UNUSED)
1045 return -EBUSY;
1046
1047 /* Is this according to the v4l spec??? */
1048 if (se401_set_size(se401, vm->width, vm->height))
1049 return -EINVAL;
1050 se401->frame[vm->frame].grabstate=FRAME_READY;
1051
1052 if (!se401->streaming)
1053 se401_start_stream(se401);
1054
1055 /* Set the picture properties */
1056 if (se401->framecount==0)
1057 se401_send_pict(se401);
1058 /* Calibrate the reset level after a few frames. */
1059 if (se401->framecount%20==1)
1060 se401_auto_resetlevel(se401);
1061
1062 return 0;
1063 }
1064 case VIDIOCSYNC:
1065 {
1066 int *frame = arg;
1067 int ret=0;
1068
1069 if(*frame <0 || *frame >= SE401_NUMFRAMES)
1070 return -EINVAL;
1071
1072 ret=se401_newframe(se401, *frame);
1073 se401->frame[*frame].grabstate=FRAME_UNUSED;
1074 return ret;
1075 }
1076 case VIDIOCGFBUF:
1077 {
1078 struct video_buffer *vb = arg;
1079
1080 memset(vb, 0, sizeof(*vb));
1081 return 0;
1082 }
1083 case VIDIOCKEY:
1084 return 0;
1085 case VIDIOCCAPTURE:
1086 return -EINVAL;
1087 case VIDIOCSFBUF:
1088 return -EINVAL;
1089 case VIDIOCGTUNER:
1090 case VIDIOCSTUNER:
1091 return -EINVAL;
1092 case VIDIOCGFREQ:
1093 case VIDIOCSFREQ:
1094 return -EINVAL;
1095 case VIDIOCGAUDIO:
1096 case VIDIOCSAUDIO:
1097 return -EINVAL;
1098 default:
1099 return -ENOIOCTLCMD;
1100 } /* end switch */
1101
1102 return 0;
1103}
1104
1105static int se401_ioctl(struct inode *inode, struct file *file,
1106 unsigned int cmd, unsigned long arg)
1107{
1108 return video_usercopy(inode, file, cmd, arg, se401_do_ioctl);
1109}
1110
1111static ssize_t se401_read(struct file *file, char __user *buf,
1112 size_t count, loff_t *ppos)
1113{
1114 int realcount=count, ret=0;
1115 struct video_device *dev = file->private_data;
1116 struct usb_se401 *se401 = (struct usb_se401 *)dev;
1117
1118
1119 if (se401->dev == NULL)
1120 return -EIO;
1121 if (realcount > se401->cwidth*se401->cheight*3)
1122 realcount=se401->cwidth*se401->cheight*3;
1123
1124 /* Shouldn't happen: */
1125 if (se401->frame[0].grabstate==FRAME_GRABBING)
1126 return -EBUSY;
1127 se401->frame[0].grabstate=FRAME_READY;
1128 se401->frame[1].grabstate=FRAME_UNUSED;
1129 se401->curframe=0;
1130
1131 if (!se401->streaming)
1132 se401_start_stream(se401);
1133
1134 /* Set the picture properties */
1135 if (se401->framecount==0)
1136 se401_send_pict(se401);
1137 /* Calibrate the reset level after a few frames. */
1138 if (se401->framecount%20==1)
1139 se401_auto_resetlevel(se401);
1140
1141 ret=se401_newframe(se401, 0);
1142
1143 se401->frame[0].grabstate=FRAME_UNUSED;
1144 if (ret)
1145 return ret;
1146 if (copy_to_user(buf, se401->frame[0].data, realcount))
1147 return -EFAULT;
1148
1149 return realcount;
1150}
1151
1152static int se401_mmap(struct file *file, struct vm_area_struct *vma)
1153{
1154 struct video_device *dev = file->private_data;
1155 struct usb_se401 *se401 = (struct usb_se401 *)dev;
1156 unsigned long start = vma->vm_start;
1157 unsigned long size = vma->vm_end-vma->vm_start;
1158 unsigned long page, pos;
1159
4186ecf8 1160 mutex_lock(&se401->lock);
1da177e4
LT		 1161
1162 if (se401->dev == NULL) {
4186ecf8 1163 mutex_unlock(&se401->lock);
1da177e4
LT		 1164 return -EIO;
1165 }
1166 if (size > (((SE401_NUMFRAMES * se401->maxframesize) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))) {
4186ecf8 1167 mutex_unlock(&se401->lock);
1da177e4
LT		 1168 return -EINVAL;
1169 }
1170 pos = (unsigned long)se401->fbuf;
1171 while (size > 0) {
1172 page = vmalloc_to_pfn((void *)pos);
1173 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
4186ecf8 1174 mutex_unlock(&se401->lock);
1da177e4
LT		 1175 return -EAGAIN;
1176 }
1177 start += PAGE_SIZE;
1178 pos += PAGE_SIZE;
1179 if (size > PAGE_SIZE)
1180 size -= PAGE_SIZE;
1181 else
1182 size = 0;
1183 }
4186ecf8 1184 mutex_unlock(&se401->lock);
1da177e4
LT		 1185
1186 return 0;
1187}
1188
1189static struct file_operations se401_fops = {
1190 .owner = THIS_MODULE,
1191 .open = se401_open,
1192 .release = se401_close,
1193 .read = se401_read,
1194 .mmap = se401_mmap,
1195 .ioctl = se401_ioctl,
0d0fbf81 1196 .compat_ioctl = v4l_compat_ioctl32,
1da177e4
LT		 1197 .llseek = no_llseek,
1198};
1199static struct video_device se401_template = {
1200 .owner = THIS_MODULE,
1201 .name = "se401 USB camera",
1202 .type = VID_TYPE_CAPTURE,
1203 .hardware = VID_HARDWARE_SE401,
1204 .fops = &se401_fops,
1205};
1206
1207
1208
1209/***************************/
1210static int se401_init(struct usb_se401 *se401, int button)
1211{
1212 int i=0, rc;
1213 unsigned char cp[0x40];
1214 char temp[200];
1215
1216 /* led on */
1217 se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 1, NULL, 0);
1218
1219 /* get camera descriptor */
1220 rc=se401_sndctrl(0, se401, SE401_REQ_GET_CAMERA_DESCRIPTOR, 0, cp, sizeof(cp));
1221 if (cp[1]!=0x41) {
1222 err("Wrong descriptor type");
1223 return 1;
1224 }
1225 sprintf (temp, "ExtraFeatures: %d", cp[3]);
1226
1227 se401->sizes=cp[4]+cp[5]*256;
1228 se401->width=kmalloc(se401->sizes*sizeof(int), GFP_KERNEL);
1229 if (!se401->width)
1230 return 1;
1231 se401->height=kmalloc(se401->sizes*sizeof(int), GFP_KERNEL);
1232 if (!se401->height) {
1233 kfree(se401->width);
1234 return 1;
1235 }
1236 for (i=0; i<se401->sizes; i++) {
1237 se401->width[i]=cp[6+i*4+0]+cp[6+i*4+1]*256;
1238 se401->height[i]=cp[6+i*4+2]+cp[6+i*4+3]*256;
1239 }
1240 sprintf (temp, "%s Sizes:", temp);
1241 for (i=0; i<se401->sizes; i++) {
1242 sprintf(temp, "%s %dx%d", temp, se401->width[i], se401->height[i]);
1243 }
1244 info("%s", temp);
1245 se401->maxframesize=se401->width[se401->sizes-1]*se401->height[se401->sizes-1]*3;
1246
1247 rc=se401_sndctrl(0, se401, SE401_REQ_GET_WIDTH, 0, cp, sizeof(cp));
1248 se401->cwidth=cp[0]+cp[1]*256;
1249 rc=se401_sndctrl(0, se401, SE401_REQ_GET_HEIGHT, 0, cp, sizeof(cp));
1250 se401->cheight=cp[0]+cp[1]*256;
1251
1252 if (!cp[2] && SE401_FORMAT_BAYER) {
1253 err("Bayer format not supported!");
1254 return 1;
1255 }
1256 /* set output mode (BAYER) */
1257 se401_sndctrl(1, se401, SE401_REQ_SET_OUTPUT_MODE, SE401_FORMAT_BAYER, NULL, 0);
1258
1259 rc=se401_sndctrl(0, se401, SE401_REQ_GET_BRT, 0, cp, sizeof(cp));
1260 se401->brightness=cp[0]+cp[1]*256;
1261 /* some default values */
1262 se401->resetlevel=0x2d;
1263 se401->rgain=0x20;
1264 se401->ggain=0x20;
1265 se401->bgain=0x20;
1266 se401_set_exposure(se401, 20000);
1267 se401->palette=VIDEO_PALETTE_RGB24;
1268 se401->enhance=1;
1269 se401->dropped=0;
1270 se401->error=0;
1271 se401->framecount=0;
1272 se401->readcount=0;
1273
1274 /* Start interrupt transfers for snapshot button */
1275 if (button) {
1276 se401->inturb=usb_alloc_urb(0, GFP_KERNEL);
1277 if (!se401->inturb) {
1278 info("Allocation of inturb failed");
1279 return 1;
1280 }
1281 usb_fill_int_urb(se401->inturb, se401->dev,
1282 usb_rcvintpipe(se401->dev, SE401_BUTTON_ENDPOINT),
1283 &se401->button, sizeof(se401->button),
1284 se401_button_irq,
1285 se401,
1286 8
1287 );
1288 if (usb_submit_urb(se401->inturb, GFP_KERNEL)) {
1289 info("int urb burned down");
1290 return 1;
1291 }
1292 } else
1293 se401->inturb=NULL;
1294
1295 /* Flash the led */
1296 se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 1, NULL, 0);
1297 se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 1, NULL, 0);
1298 se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 0, NULL, 0);
1299 se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 0, NULL, 0);
1300
1301 return 0;
1302}
1303
1304static int se401_probe(struct usb_interface *intf,
1305 const struct usb_device_id *id)
1306{
1307 struct usb_device *dev = interface_to_usbdev(intf);
1308 struct usb_interface_descriptor *interface;
1309 struct usb_se401 *se401;
1310 char *camera_name=NULL;
1311 int button=1;
1312
1313 /* We don't handle multi-config cameras */
1314 if (dev->descriptor.bNumConfigurations != 1)
1315 return -ENODEV;
1316
1317 interface = &intf->cur_altsetting->desc;
1318
1319 /* Is it an se401? */
1320 if (le16_to_cpu(dev->descriptor.idVendor) == 0x03e8 &&
1321 le16_to_cpu(dev->descriptor.idProduct) == 0x0004) {
1322 camera_name="Endpoints/Aox SE401";
1323 } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x0471 &&
1324 le16_to_cpu(dev->descriptor.idProduct) == 0x030b) {
1325 camera_name="Philips PCVC665K";
1326 } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x047d &&
1327 le16_to_cpu(dev->descriptor.idProduct) == 0x5001) {
1328 camera_name="Kensington VideoCAM 67014";
1329 } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x047d &&
1330 le16_to_cpu(dev->descriptor.idProduct) == 0x5002) {
1331 camera_name="Kensington VideoCAM 6701(5/7)";
1332 } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x047d &&
1333 le16_to_cpu(dev->descriptor.idProduct) == 0x5003) {
1334 camera_name="Kensington VideoCAM 67016";
1335 button=0;
1336 } else
1337 return -ENODEV;
1338
1339 /* Checking vendor/product should be enough, but what the hell */
1340 if (interface->bInterfaceClass != 0x00)
1341 return -ENODEV;
1342 if (interface->bInterfaceSubClass != 0x00)
1343 return -ENODEV;
1344
1345 /* We found one */
1346 info("SE401 camera found: %s", camera_name);
1347
80b6ca48 1348 if ((se401 = kzalloc(sizeof(*se401), GFP_KERNEL)) == NULL) {
1da177e4
LT		 1349 err("couldn't kmalloc se401 struct");
1350 return -ENOMEM;
1351 }
1352
1da177e4
LT		 1353 se401->dev = dev;
1354 se401->iface = interface->bInterfaceNumber;
1355 se401->camera_name = camera_name;
1356
1357 info("firmware version: %02x", le16_to_cpu(dev->descriptor.bcdDevice) & 255);
1358
1359 if (se401_init(se401, button)) {
1360 kfree(se401);
1361 return -EIO;
1362 }
1363
1364 memcpy(&se401->vdev, &se401_template, sizeof(se401_template));
1365 memcpy(se401->vdev.name, se401->camera_name, strlen(se401->camera_name));
1366 init_waitqueue_head(&se401->wq);
4186ecf8 1367 mutex_init(&se401->lock);
1da177e4
LT		 1368 wmb();
1369
1370 if (video_register_device(&se401->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
1371 kfree(se401);
1372 err("video_register_device failed");
1373 return -EIO;
1374 }
1375 info("registered new video device: video%d", se401->vdev.minor);
1376
1377 usb_set_intfdata (intf, se401);
1378 return 0;
1379}
1380
1381static void se401_disconnect(struct usb_interface *intf)
1382{
1383 struct usb_se401 *se401 = usb_get_intfdata (intf);
1384
1385 usb_set_intfdata (intf, NULL);
1386 if (se401) {
1387 video_unregister_device(&se401->vdev);
1388 if (!se401->user){
1389 usb_se401_remove_disconnected(se401);
1390 } else {
1391 se401->frame[0].grabstate = FRAME_ERROR;
1392 se401->frame[0].grabstate = FRAME_ERROR;
1393
1394 se401->streaming = 0;
1395
1396 wake_up_interruptible(&se401->wq);
1397 se401->removed = 1;
1398 }
1399 }
1400}
1401
1402static struct usb_driver se401_driver = {
1da177e4
LT		 1403 .name = "se401",
1404 .id_table = device_table,
1405 .probe = se401_probe,
1406 .disconnect = se401_disconnect,
1407};
1408
1409
1410
1411/****************************************************************************
1412 *
1413 * Module routines
1414 *
1415 ***************************************************************************/
1416
1417static int __init usb_se401_init(void)
1418{
1419 info("SE401 usb camera driver version %s registering", version);
1420 if (flickerless)
1421 if (flickerless!=50 && flickerless!=60) {
1422 info("Invallid flickerless value, use 0, 50 or 60.");
1423 return -1;
1424 }
1425 return usb_register(&se401_driver);
1426}
1427
1428static void __exit usb_se401_exit(void)
1429{
1430 usb_deregister(&se401_driver);
1431 info("SE401 driver deregistered");
1432}
1433
1434module_init(usb_se401_init);
1435module_exit(usb_se401_exit);
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