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1da177e4 LT |
1 | /* |
2 | * USB ViCam WebCam driver | |
3 | * Copyright (c) 2002 Joe Burks (jburks@wavicle.org), | |
4 | * Christopher L Cheney (ccheney@cheney.cx), | |
5 | * Pavel Machek (pavel@suse.cz), | |
6 | * John Tyner (jtyner@cs.ucr.edu), | |
7 | * Monroe Williams (monroe@pobox.com) | |
8 | * | |
9 | * Supports 3COM HomeConnect PC Digital WebCam | |
81409ed0 | 10 | * Supports Compro PS39U WebCam |
1da177e4 LT |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * This source code is based heavily on the CPiA webcam driver which was | |
27 | * written by Peter Pregler, Scott J. Bertin and Johannes Erdfelt | |
28 | * | |
29 | * Portions of this code were also copied from usbvideo.c | |
30 | * | |
59c51591 | 31 | * Special thanks to the whole team at Sourceforge for help making |
1da177e4 LT |
32 | * this driver become a reality. Notably: |
33 | * Andy Armstrong who reverse engineered the color encoding and | |
34 | * Pavel Machek and Chris Cheney who worked on reverse engineering the | |
35 | * camera controls and wrote the first generation driver. | |
36 | */ | |
37 | ||
38 | #include <linux/kernel.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/videodev.h> | |
42 | #include <linux/usb.h> | |
43 | #include <linux/vmalloc.h> | |
f894dfd7 | 44 | #include <linux/mm.h> |
1da177e4 | 45 | #include <linux/slab.h> |
405f5571 | 46 | #include <linux/smp_lock.h> |
4186ecf8 | 47 | #include <linux/mutex.h> |
fb54be87 JS |
48 | #include <linux/firmware.h> |
49 | #include <linux/ihex.h> | |
1da177e4 LT |
50 | #include "usbvideo.h" |
51 | ||
52 | // #define VICAM_DEBUG | |
53 | ||
54 | #ifdef VICAM_DEBUG | |
4126a8f5 | 55 | #define ADBG(lineno,fmt,args...) printk(fmt, jiffies, __func__, lineno, ##args) |
1da177e4 LT |
56 | #define DBG(fmt,args...) ADBG((__LINE__),KERN_DEBUG __FILE__"(%ld):%s (%d):"fmt,##args) |
57 | #else | |
58 | #define DBG(fmn,args...) do {} while(0) | |
59 | #endif | |
60 | ||
61 | #define DRIVER_AUTHOR "Joe Burks, jburks@wavicle.org" | |
62 | #define DRIVER_DESC "ViCam WebCam Driver" | |
63 | ||
64 | /* Define these values to match your device */ | |
65 | #define USB_VICAM_VENDOR_ID 0x04c1 | |
66 | #define USB_VICAM_PRODUCT_ID 0x009d | |
81409ed0 BB |
67 | #define USB_COMPRO_VENDOR_ID 0x0602 |
68 | #define USB_COMPRO_PRODUCT_ID 0x1001 | |
1da177e4 LT |
69 | |
70 | #define VICAM_BYTES_PER_PIXEL 3 | |
71 | #define VICAM_MAX_READ_SIZE (512*242+128) | |
72 | #define VICAM_MAX_FRAME_SIZE (VICAM_BYTES_PER_PIXEL*320*240) | |
73 | #define VICAM_FRAMES 2 | |
74 | ||
75 | #define VICAM_HEADER_SIZE 64 | |
76 | ||
1da177e4 LT |
77 | /* rvmalloc / rvfree copied from usbvideo.c |
78 | * | |
79 | * Not sure why these are not yet non-statics which I can reference through | |
80 | * usbvideo.h the same as it is in 2.4.20. I bet this will get fixed sometime | |
81 | * in the future. | |
d56410e0 | 82 | * |
1da177e4 LT |
83 | */ |
84 | static void *rvmalloc(unsigned long size) | |
85 | { | |
86 | void *mem; | |
87 | unsigned long adr; | |
88 | ||
89 | size = PAGE_ALIGN(size); | |
90 | mem = vmalloc_32(size); | |
91 | if (!mem) | |
92 | return NULL; | |
93 | ||
94 | memset(mem, 0, size); /* Clear the ram out, no junk to the user */ | |
95 | adr = (unsigned long) mem; | |
96 | while (size > 0) { | |
97 | SetPageReserved(vmalloc_to_page((void *)adr)); | |
98 | adr += PAGE_SIZE; | |
99 | size -= PAGE_SIZE; | |
100 | } | |
101 | ||
102 | return mem; | |
103 | } | |
104 | ||
105 | static void rvfree(void *mem, unsigned long size) | |
106 | { | |
107 | unsigned long adr; | |
108 | ||
109 | if (!mem) | |
110 | return; | |
111 | ||
112 | adr = (unsigned long) mem; | |
113 | while ((long) size > 0) { | |
114 | ClearPageReserved(vmalloc_to_page((void *)adr)); | |
115 | adr += PAGE_SIZE; | |
116 | size -= PAGE_SIZE; | |
117 | } | |
118 | vfree(mem); | |
119 | } | |
120 | ||
121 | struct vicam_camera { | |
122 | u16 shutter_speed; // capture shutter speed | |
123 | u16 gain; // capture gain | |
124 | ||
125 | u8 *raw_image; // raw data captured from the camera | |
126 | u8 *framebuf; // processed data in RGB24 format | |
127 | u8 *cntrlbuf; // area used to send control msgs | |
128 | ||
129 | struct video_device vdev; // v4l video device | |
130 | struct usb_device *udev; // usb device | |
131 | ||
132 | /* guard against simultaneous accesses to the camera */ | |
4186ecf8 | 133 | struct mutex cam_lock; |
1da177e4 LT |
134 | |
135 | int is_initialized; | |
136 | u8 open_count; | |
137 | u8 bulkEndpoint; | |
138 | int needsDummyRead; | |
1da177e4 LT |
139 | }; |
140 | ||
141 | static int vicam_probe( struct usb_interface *intf, const struct usb_device_id *id); | |
142 | static void vicam_disconnect(struct usb_interface *intf); | |
143 | static void read_frame(struct vicam_camera *cam, int framenum); | |
144 | static void vicam_decode_color(const u8 *, u8 *); | |
145 | ||
146 | static int __send_control_msg(struct vicam_camera *cam, | |
147 | u8 request, | |
148 | u16 value, | |
149 | u16 index, | |
150 | unsigned char *cp, | |
151 | u16 size) | |
152 | { | |
153 | int status; | |
154 | ||
155 | /* cp must be memory that has been allocated by kmalloc */ | |
156 | ||
157 | status = usb_control_msg(cam->udev, | |
158 | usb_sndctrlpipe(cam->udev, 0), | |
159 | request, | |
160 | USB_DIR_OUT | USB_TYPE_VENDOR | | |
161 | USB_RECIP_DEVICE, value, index, | |
162 | cp, size, 1000); | |
163 | ||
164 | status = min(status, 0); | |
165 | ||
166 | if (status < 0) { | |
167 | printk(KERN_INFO "Failed sending control message, error %d.\n", | |
168 | status); | |
169 | } | |
170 | ||
171 | return status; | |
172 | } | |
173 | ||
174 | static int send_control_msg(struct vicam_camera *cam, | |
175 | u8 request, | |
176 | u16 value, | |
177 | u16 index, | |
178 | unsigned char *cp, | |
179 | u16 size) | |
180 | { | |
181 | int status = -ENODEV; | |
4186ecf8 | 182 | mutex_lock(&cam->cam_lock); |
1da177e4 LT |
183 | if (cam->udev) { |
184 | status = __send_control_msg(cam, request, value, | |
185 | index, cp, size); | |
186 | } | |
4186ecf8 | 187 | mutex_unlock(&cam->cam_lock); |
1da177e4 LT |
188 | return status; |
189 | } | |
190 | static int | |
191 | initialize_camera(struct vicam_camera *cam) | |
192 | { | |
fb54be87 JS |
193 | int err; |
194 | const struct ihex_binrec *rec; | |
031002d7 | 195 | const struct firmware *uninitialized_var(fw); |
fb54be87 JS |
196 | |
197 | err = request_ihex_firmware(&fw, "vicam/firmware.fw", &cam->udev->dev); | |
198 | if (err) { | |
199 | printk(KERN_ERR "Failed to load \"vicam/firmware.fw\": %d\n", | |
200 | err); | |
201 | return err; | |
202 | } | |
203 | ||
204 | for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) { | |
205 | memcpy(cam->cntrlbuf, rec->data, be16_to_cpu(rec->len)); | |
1da177e4 LT |
206 | |
207 | err = send_control_msg(cam, 0xff, 0, 0, | |
fb54be87 JS |
208 | cam->cntrlbuf, be16_to_cpu(rec->len)); |
209 | if (err) | |
210 | break; | |
1da177e4 LT |
211 | } |
212 | ||
fb54be87 JS |
213 | release_firmware(fw); |
214 | ||
1da177e4 LT |
215 | return err; |
216 | } | |
217 | ||
218 | static int | |
219 | set_camera_power(struct vicam_camera *cam, int state) | |
220 | { | |
221 | int status; | |
222 | ||
223 | if ((status = send_control_msg(cam, 0x50, state, 0, NULL, 0)) < 0) | |
224 | return status; | |
225 | ||
226 | if (state) { | |
227 | send_control_msg(cam, 0x55, 1, 0, NULL, 0); | |
228 | } | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
069b7479 | 233 | static long |
bec43661 | 234 | vicam_ioctl(struct file *file, unsigned int ioctlnr, unsigned long arg) |
1da177e4 LT |
235 | { |
236 | void __user *user_arg = (void __user *)arg; | |
237 | struct vicam_camera *cam = file->private_data; | |
069b7479 | 238 | long retval = 0; |
1da177e4 LT |
239 | |
240 | if (!cam) | |
241 | return -ENODEV; | |
242 | ||
243 | switch (ioctlnr) { | |
244 | /* query capabilities */ | |
245 | case VIDIOCGCAP: | |
246 | { | |
247 | struct video_capability b; | |
248 | ||
249 | DBG("VIDIOCGCAP\n"); | |
250 | memset(&b, 0, sizeof(b)); | |
251 | strcpy(b.name, "ViCam-based Camera"); | |
252 | b.type = VID_TYPE_CAPTURE; | |
253 | b.channels = 1; | |
254 | b.audios = 0; | |
255 | b.maxwidth = 320; /* VIDEOSIZE_CIF */ | |
256 | b.maxheight = 240; | |
257 | b.minwidth = 320; /* VIDEOSIZE_48_48 */ | |
258 | b.minheight = 240; | |
259 | ||
260 | if (copy_to_user(user_arg, &b, sizeof(b))) | |
261 | retval = -EFAULT; | |
262 | ||
263 | break; | |
264 | } | |
265 | /* get/set video source - we are a camera and nothing else */ | |
266 | case VIDIOCGCHAN: | |
267 | { | |
268 | struct video_channel v; | |
269 | ||
270 | DBG("VIDIOCGCHAN\n"); | |
271 | if (copy_from_user(&v, user_arg, sizeof(v))) { | |
272 | retval = -EFAULT; | |
273 | break; | |
274 | } | |
275 | if (v.channel != 0) { | |
276 | retval = -EINVAL; | |
277 | break; | |
278 | } | |
279 | ||
280 | v.channel = 0; | |
281 | strcpy(v.name, "Camera"); | |
282 | v.tuners = 0; | |
283 | v.flags = 0; | |
284 | v.type = VIDEO_TYPE_CAMERA; | |
285 | v.norm = 0; | |
286 | ||
287 | if (copy_to_user(user_arg, &v, sizeof(v))) | |
288 | retval = -EFAULT; | |
289 | break; | |
290 | } | |
291 | ||
292 | case VIDIOCSCHAN: | |
293 | { | |
294 | int v; | |
295 | ||
296 | if (copy_from_user(&v, user_arg, sizeof(v))) | |
297 | retval = -EFAULT; | |
298 | DBG("VIDIOCSCHAN %d\n", v); | |
299 | ||
300 | if (retval == 0 && v != 0) | |
301 | retval = -EINVAL; | |
302 | ||
303 | break; | |
304 | } | |
305 | ||
306 | /* image properties */ | |
307 | case VIDIOCGPICT: | |
308 | { | |
309 | struct video_picture vp; | |
310 | DBG("VIDIOCGPICT\n"); | |
311 | memset(&vp, 0, sizeof (struct video_picture)); | |
312 | vp.brightness = cam->gain << 8; | |
313 | vp.depth = 24; | |
314 | vp.palette = VIDEO_PALETTE_RGB24; | |
315 | if (copy_to_user(user_arg, &vp, sizeof (struct video_picture))) | |
316 | retval = -EFAULT; | |
317 | break; | |
318 | } | |
319 | ||
320 | case VIDIOCSPICT: | |
321 | { | |
322 | struct video_picture vp; | |
d56410e0 | 323 | |
1da177e4 LT |
324 | if (copy_from_user(&vp, user_arg, sizeof(vp))) { |
325 | retval = -EFAULT; | |
326 | break; | |
327 | } | |
d56410e0 | 328 | |
1da177e4 LT |
329 | DBG("VIDIOCSPICT depth = %d, pal = %d\n", vp.depth, |
330 | vp.palette); | |
331 | ||
332 | cam->gain = vp.brightness >> 8; | |
333 | ||
334 | if (vp.depth != 24 | |
335 | || vp.palette != VIDEO_PALETTE_RGB24) | |
336 | retval = -EINVAL; | |
337 | ||
338 | break; | |
339 | } | |
340 | ||
341 | /* get/set capture window */ | |
342 | case VIDIOCGWIN: | |
343 | { | |
344 | struct video_window vw; | |
345 | vw.x = 0; | |
346 | vw.y = 0; | |
347 | vw.width = 320; | |
348 | vw.height = 240; | |
349 | vw.chromakey = 0; | |
350 | vw.flags = 0; | |
351 | vw.clips = NULL; | |
352 | vw.clipcount = 0; | |
353 | ||
354 | DBG("VIDIOCGWIN\n"); | |
355 | ||
356 | if (copy_to_user(user_arg, (void *)&vw, sizeof(vw))) | |
357 | retval = -EFAULT; | |
358 | ||
359 | // I'm not sure what the deal with a capture window is, it is very poorly described | |
360 | // in the doc. So I won't support it now. | |
361 | break; | |
362 | } | |
363 | ||
364 | case VIDIOCSWIN: | |
365 | { | |
366 | ||
367 | struct video_window vw; | |
368 | ||
369 | if (copy_from_user(&vw, user_arg, sizeof(vw))) { | |
370 | retval = -EFAULT; | |
371 | break; | |
372 | } | |
373 | ||
374 | DBG("VIDIOCSWIN %d x %d\n", vw.width, vw.height); | |
d56410e0 | 375 | |
1da177e4 LT |
376 | if ( vw.width != 320 || vw.height != 240 ) |
377 | retval = -EFAULT; | |
378 | ||
379 | break; | |
380 | } | |
381 | ||
382 | /* mmap interface */ | |
383 | case VIDIOCGMBUF: | |
384 | { | |
385 | struct video_mbuf vm; | |
386 | int i; | |
387 | ||
388 | DBG("VIDIOCGMBUF\n"); | |
389 | memset(&vm, 0, sizeof (vm)); | |
390 | vm.size = | |
391 | VICAM_MAX_FRAME_SIZE * VICAM_FRAMES; | |
392 | vm.frames = VICAM_FRAMES; | |
393 | for (i = 0; i < VICAM_FRAMES; i++) | |
394 | vm.offsets[i] = VICAM_MAX_FRAME_SIZE * i; | |
395 | ||
396 | if (copy_to_user(user_arg, (void *)&vm, sizeof(vm))) | |
397 | retval = -EFAULT; | |
398 | ||
399 | break; | |
400 | } | |
401 | ||
402 | case VIDIOCMCAPTURE: | |
403 | { | |
404 | struct video_mmap vm; | |
405 | // int video_size; | |
406 | ||
407 | if (copy_from_user((void *)&vm, user_arg, sizeof(vm))) { | |
408 | retval = -EFAULT; | |
409 | break; | |
410 | } | |
411 | ||
412 | DBG("VIDIOCMCAPTURE frame=%d, height=%d, width=%d, format=%d.\n",vm.frame,vm.width,vm.height,vm.format); | |
413 | ||
414 | if ( vm.frame >= VICAM_FRAMES || vm.format != VIDEO_PALETTE_RGB24 ) | |
415 | retval = -EINVAL; | |
416 | ||
417 | // in theory right here we'd start the image capturing | |
418 | // (fill in a bulk urb and submit it asynchronously) | |
419 | // | |
420 | // Instead we're going to do a total hack job for now and | |
421 | // retrieve the frame in VIDIOCSYNC | |
422 | ||
423 | break; | |
424 | } | |
425 | ||
426 | case VIDIOCSYNC: | |
427 | { | |
428 | int frame; | |
429 | ||
430 | if (copy_from_user((void *)&frame, user_arg, sizeof(int))) { | |
431 | retval = -EFAULT; | |
432 | break; | |
433 | } | |
434 | DBG("VIDIOCSYNC: %d\n", frame); | |
435 | ||
436 | read_frame(cam, frame); | |
437 | vicam_decode_color(cam->raw_image, | |
438 | cam->framebuf + | |
439 | frame * VICAM_MAX_FRAME_SIZE ); | |
440 | ||
441 | break; | |
442 | } | |
443 | ||
444 | /* pointless to implement overlay with this camera */ | |
445 | case VIDIOCCAPTURE: | |
446 | case VIDIOCGFBUF: | |
447 | case VIDIOCSFBUF: | |
448 | case VIDIOCKEY: | |
449 | retval = -EINVAL; | |
450 | break; | |
451 | ||
452 | /* tuner interface - we have none */ | |
453 | case VIDIOCGTUNER: | |
454 | case VIDIOCSTUNER: | |
455 | case VIDIOCGFREQ: | |
456 | case VIDIOCSFREQ: | |
457 | retval = -EINVAL; | |
458 | break; | |
459 | ||
460 | /* audio interface - we have none */ | |
461 | case VIDIOCGAUDIO: | |
462 | case VIDIOCSAUDIO: | |
463 | retval = -EINVAL; | |
464 | break; | |
465 | default: | |
466 | retval = -ENOIOCTLCMD; | |
467 | break; | |
468 | } | |
469 | ||
470 | return retval; | |
471 | } | |
472 | ||
473 | static int | |
bec43661 | 474 | vicam_open(struct file *file) |
1da177e4 | 475 | { |
c170ecf4 | 476 | struct vicam_camera *cam = video_drvdata(file); |
601e9444 | 477 | |
1da177e4 LT |
478 | DBG("open\n"); |
479 | ||
480 | if (!cam) { | |
481 | printk(KERN_ERR | |
482 | "vicam video_device improperly initialized"); | |
f88f8295 | 483 | return -EINVAL; |
1da177e4 LT |
484 | } |
485 | ||
486 | /* the videodev_lock held above us protects us from | |
487 | * simultaneous opens...for now. we probably shouldn't | |
488 | * rely on this fact forever. | |
489 | */ | |
490 | ||
d56dc612 | 491 | lock_kernel(); |
1da177e4 LT |
492 | if (cam->open_count > 0) { |
493 | printk(KERN_INFO | |
494 | "vicam_open called on already opened camera"); | |
d56dc612 | 495 | unlock_kernel(); |
1da177e4 LT |
496 | return -EBUSY; |
497 | } | |
498 | ||
499 | cam->raw_image = kmalloc(VICAM_MAX_READ_SIZE, GFP_KERNEL); | |
500 | if (!cam->raw_image) { | |
d56dc612 | 501 | unlock_kernel(); |
1da177e4 LT |
502 | return -ENOMEM; |
503 | } | |
504 | ||
505 | cam->framebuf = rvmalloc(VICAM_MAX_FRAME_SIZE * VICAM_FRAMES); | |
506 | if (!cam->framebuf) { | |
507 | kfree(cam->raw_image); | |
d56dc612 | 508 | unlock_kernel(); |
1da177e4 LT |
509 | return -ENOMEM; |
510 | } | |
511 | ||
512 | cam->cntrlbuf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
513 | if (!cam->cntrlbuf) { | |
514 | kfree(cam->raw_image); | |
515 | rvfree(cam->framebuf, VICAM_MAX_FRAME_SIZE * VICAM_FRAMES); | |
d56dc612 | 516 | unlock_kernel(); |
1da177e4 LT |
517 | return -ENOMEM; |
518 | } | |
519 | ||
520 | // First upload firmware, then turn the camera on | |
521 | ||
522 | if (!cam->is_initialized) { | |
523 | initialize_camera(cam); | |
524 | ||
525 | cam->is_initialized = 1; | |
526 | } | |
527 | ||
528 | set_camera_power(cam, 1); | |
529 | ||
530 | cam->needsDummyRead = 1; | |
531 | cam->open_count++; | |
532 | ||
d56410e0 | 533 | file->private_data = cam; |
d56dc612 | 534 | unlock_kernel(); |
d56410e0 | 535 | |
1da177e4 LT |
536 | return 0; |
537 | } | |
538 | ||
d56410e0 | 539 | static int |
bec43661 | 540 | vicam_close(struct file *file) |
1da177e4 LT |
541 | { |
542 | struct vicam_camera *cam = file->private_data; | |
543 | int open_count; | |
544 | struct usb_device *udev; | |
545 | ||
546 | DBG("close\n"); | |
547 | ||
548 | /* it's not the end of the world if | |
549 | * we fail to turn the camera off. | |
550 | */ | |
551 | ||
552 | set_camera_power(cam, 0); | |
553 | ||
554 | kfree(cam->raw_image); | |
555 | rvfree(cam->framebuf, VICAM_MAX_FRAME_SIZE * VICAM_FRAMES); | |
556 | kfree(cam->cntrlbuf); | |
557 | ||
4186ecf8 | 558 | mutex_lock(&cam->cam_lock); |
1da177e4 LT |
559 | |
560 | cam->open_count--; | |
561 | open_count = cam->open_count; | |
562 | udev = cam->udev; | |
563 | ||
4186ecf8 | 564 | mutex_unlock(&cam->cam_lock); |
1da177e4 LT |
565 | |
566 | if (!open_count && !udev) { | |
567 | kfree(cam); | |
568 | } | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
573 | static void vicam_decode_color(const u8 *data, u8 *rgb) | |
574 | { | |
575 | /* vicam_decode_color - Convert from Vicam Y-Cr-Cb to RGB | |
576 | * Copyright (C) 2002 Monroe Williams (monroe@pobox.com) | |
577 | */ | |
578 | ||
579 | int i, prevY, nextY; | |
580 | ||
581 | prevY = 512; | |
582 | nextY = 512; | |
583 | ||
584 | data += VICAM_HEADER_SIZE; | |
585 | ||
586 | for( i = 0; i < 240; i++, data += 512 ) { | |
587 | const int y = ( i * 242 ) / 240; | |
588 | ||
589 | int j, prevX, nextX; | |
590 | int Y, Cr, Cb; | |
591 | ||
592 | if ( y == 242 - 1 ) { | |
593 | nextY = -512; | |
594 | } | |
595 | ||
596 | prevX = 1; | |
597 | nextX = 1; | |
598 | ||
599 | for ( j = 0; j < 320; j++, rgb += 3 ) { | |
600 | const int x = ( j * 512 ) / 320; | |
601 | const u8 * const src = &data[x]; | |
602 | ||
603 | if ( x == 512 - 1 ) { | |
604 | nextX = -1; | |
605 | } | |
606 | ||
607 | Cr = ( src[prevX] - src[0] ) + | |
608 | ( src[nextX] - src[0] ); | |
609 | Cr /= 2; | |
610 | ||
611 | Cb = ( src[prevY] - src[prevX + prevY] ) + | |
612 | ( src[prevY] - src[nextX + prevY] ) + | |
613 | ( src[nextY] - src[prevX + nextY] ) + | |
614 | ( src[nextY] - src[nextX + nextY] ); | |
615 | Cb /= 4; | |
616 | ||
617 | Y = 1160 * ( src[0] + ( Cr / 2 ) - 16 ); | |
618 | ||
619 | if ( i & 1 ) { | |
620 | int Ct = Cr; | |
621 | Cr = Cb; | |
622 | Cb = Ct; | |
623 | } | |
624 | ||
625 | if ( ( x ^ i ) & 1 ) { | |
626 | Cr = -Cr; | |
627 | Cb = -Cb; | |
628 | } | |
629 | ||
630 | rgb[0] = clamp( ( ( Y + ( 2017 * Cb ) ) + | |
631 | 500 ) / 900, 0, 255 ); | |
632 | rgb[1] = clamp( ( ( Y - ( 392 * Cb ) - | |
633 | ( 813 * Cr ) ) + | |
634 | 500 ) / 1000, 0, 255 ); | |
635 | rgb[2] = clamp( ( ( Y + ( 1594 * Cr ) ) + | |
636 | 500 ) / 1300, 0, 255 ); | |
637 | ||
638 | prevX = -1; | |
639 | } | |
640 | ||
641 | prevY = -512; | |
642 | } | |
643 | } | |
644 | ||
645 | static void | |
646 | read_frame(struct vicam_camera *cam, int framenum) | |
647 | { | |
648 | unsigned char *request = cam->cntrlbuf; | |
649 | int realShutter; | |
650 | int n; | |
651 | int actual_length; | |
652 | ||
653 | if (cam->needsDummyRead) { | |
654 | cam->needsDummyRead = 0; | |
655 | read_frame(cam, framenum); | |
656 | } | |
657 | ||
658 | memset(request, 0, 16); | |
659 | request[0] = cam->gain; // 0 = 0% gain, FF = 100% gain | |
660 | ||
661 | request[1] = 0; // 512x242 capture | |
662 | ||
663 | request[2] = 0x90; // the function of these two bytes | |
664 | request[3] = 0x07; // is not yet understood | |
665 | ||
666 | if (cam->shutter_speed > 60) { | |
667 | // Short exposure | |
668 | realShutter = | |
669 | ((-15631900 / cam->shutter_speed) + 260533) / 1000; | |
670 | request[4] = realShutter & 0xFF; | |
671 | request[5] = (realShutter >> 8) & 0xFF; | |
672 | request[6] = 0x03; | |
673 | request[7] = 0x01; | |
674 | } else { | |
675 | // Long exposure | |
676 | realShutter = 15600 / cam->shutter_speed - 1; | |
677 | request[4] = 0; | |
678 | request[5] = 0; | |
679 | request[6] = realShutter & 0xFF; | |
680 | request[7] = realShutter >> 8; | |
681 | } | |
682 | ||
96de0e25 | 683 | // Per John Markus Bjørndalen, byte at index 8 causes problems if it isn't 0 |
1da177e4 LT |
684 | request[8] = 0; |
685 | // bytes 9-15 do not seem to affect exposure or image quality | |
686 | ||
4186ecf8 | 687 | mutex_lock(&cam->cam_lock); |
1da177e4 LT |
688 | |
689 | if (!cam->udev) { | |
690 | goto done; | |
691 | } | |
692 | ||
693 | n = __send_control_msg(cam, 0x51, 0x80, 0, request, 16); | |
694 | ||
695 | if (n < 0) { | |
696 | printk(KERN_ERR | |
697 | " Problem sending frame capture control message"); | |
698 | goto done; | |
699 | } | |
700 | ||
701 | n = usb_bulk_msg(cam->udev, | |
702 | usb_rcvbulkpipe(cam->udev, cam->bulkEndpoint), | |
703 | cam->raw_image, | |
704 | 512 * 242 + 128, &actual_length, 10000); | |
705 | ||
706 | if (n < 0) { | |
707 | printk(KERN_ERR "Problem during bulk read of frame data: %d\n", | |
708 | n); | |
709 | } | |
710 | ||
711 | done: | |
4186ecf8 | 712 | mutex_unlock(&cam->cam_lock); |
1da177e4 LT |
713 | } |
714 | ||
715 | static ssize_t | |
716 | vicam_read( struct file *file, char __user *buf, size_t count, loff_t *ppos ) | |
717 | { | |
718 | struct vicam_camera *cam = file->private_data; | |
719 | ||
720 | DBG("read %d bytes.\n", (int) count); | |
721 | ||
722 | if (*ppos >= VICAM_MAX_FRAME_SIZE) { | |
723 | *ppos = 0; | |
724 | return 0; | |
725 | } | |
726 | ||
727 | if (*ppos == 0) { | |
728 | read_frame(cam, 0); | |
729 | vicam_decode_color(cam->raw_image, | |
730 | cam->framebuf + | |
731 | 0 * VICAM_MAX_FRAME_SIZE); | |
732 | } | |
733 | ||
734 | count = min_t(size_t, count, VICAM_MAX_FRAME_SIZE - *ppos); | |
735 | ||
736 | if (copy_to_user(buf, &cam->framebuf[*ppos], count)) { | |
737 | count = -EFAULT; | |
738 | } else { | |
739 | *ppos += count; | |
740 | } | |
741 | ||
742 | if (count == VICAM_MAX_FRAME_SIZE) { | |
743 | *ppos = 0; | |
744 | } | |
745 | ||
746 | return count; | |
747 | } | |
748 | ||
749 | ||
750 | static int | |
751 | vicam_mmap(struct file *file, struct vm_area_struct *vma) | |
752 | { | |
753 | // TODO: allocate the raw frame buffer if necessary | |
754 | unsigned long page, pos; | |
755 | unsigned long start = vma->vm_start; | |
756 | unsigned long size = vma->vm_end-vma->vm_start; | |
757 | struct vicam_camera *cam = file->private_data; | |
758 | ||
759 | if (!cam) | |
760 | return -ENODEV; | |
761 | ||
762 | DBG("vicam_mmap: %ld\n", size); | |
763 | ||
764 | /* We let mmap allocate as much as it wants because Linux was adding 2048 bytes | |
765 | * to the size the application requested for mmap and it was screwing apps up. | |
766 | if (size > VICAM_FRAMES*VICAM_MAX_FRAME_SIZE) | |
767 | return -EINVAL; | |
768 | */ | |
769 | ||
770 | pos = (unsigned long)cam->framebuf; | |
771 | while (size > 0) { | |
772 | page = vmalloc_to_pfn((void *)pos); | |
773 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) | |
774 | return -EAGAIN; | |
775 | ||
776 | start += PAGE_SIZE; | |
777 | pos += PAGE_SIZE; | |
778 | if (size > PAGE_SIZE) | |
779 | size -= PAGE_SIZE; | |
780 | else | |
781 | size = 0; | |
782 | } | |
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
bec43661 | 787 | static const struct v4l2_file_operations vicam_fops = { |
1da177e4 LT |
788 | .owner = THIS_MODULE, |
789 | .open = vicam_open, | |
790 | .release = vicam_close, | |
791 | .read = vicam_read, | |
792 | .mmap = vicam_mmap, | |
793 | .ioctl = vicam_ioctl, | |
1da177e4 LT |
794 | }; |
795 | ||
796 | static struct video_device vicam_template = { | |
1da177e4 | 797 | .name = "ViCam-based USB Camera", |
1da177e4 LT |
798 | .fops = &vicam_fops, |
799 | .minor = -1, | |
aa5e90af | 800 | .release = video_device_release_empty, |
1da177e4 LT |
801 | }; |
802 | ||
803 | /* table of devices that work with this driver */ | |
804 | static struct usb_device_id vicam_table[] = { | |
805 | {USB_DEVICE(USB_VICAM_VENDOR_ID, USB_VICAM_PRODUCT_ID)}, | |
81409ed0 | 806 | {USB_DEVICE(USB_COMPRO_VENDOR_ID, USB_COMPRO_PRODUCT_ID)}, |
1da177e4 LT |
807 | {} /* Terminating entry */ |
808 | }; | |
809 | ||
810 | MODULE_DEVICE_TABLE(usb, vicam_table); | |
811 | ||
812 | static struct usb_driver vicam_driver = { | |
1da177e4 LT |
813 | .name = "vicam", |
814 | .probe = vicam_probe, | |
815 | .disconnect = vicam_disconnect, | |
816 | .id_table = vicam_table | |
817 | }; | |
818 | ||
819 | /** | |
820 | * vicam_probe | |
821 | * @intf: the interface | |
822 | * @id: the device id | |
823 | * | |
824 | * Called by the usb core when a new device is connected that it thinks | |
825 | * this driver might be interested in. | |
826 | */ | |
827 | static int | |
828 | vicam_probe( struct usb_interface *intf, const struct usb_device_id *id) | |
829 | { | |
830 | struct usb_device *dev = interface_to_usbdev(intf); | |
831 | int bulkEndpoint = 0; | |
832 | const struct usb_host_interface *interface; | |
833 | const struct usb_endpoint_descriptor *endpoint; | |
834 | struct vicam_camera *cam; | |
d56410e0 | 835 | |
1da177e4 LT |
836 | printk(KERN_INFO "ViCam based webcam connected\n"); |
837 | ||
838 | interface = intf->cur_altsetting; | |
839 | ||
840 | DBG(KERN_DEBUG "Interface %d. has %u. endpoints!\n", | |
841 | interface->desc.bInterfaceNumber, (unsigned) (interface->desc.bNumEndpoints)); | |
842 | endpoint = &interface->endpoint[0].desc; | |
843 | ||
13417982 | 844 | if (usb_endpoint_is_bulk_in(endpoint)) { |
1da177e4 LT |
845 | /* we found a bulk in endpoint */ |
846 | bulkEndpoint = endpoint->bEndpointAddress; | |
847 | } else { | |
848 | printk(KERN_ERR | |
849 | "No bulk in endpoint was found ?! (this is bad)\n"); | |
850 | } | |
851 | ||
852 | if ((cam = | |
dd00cc48 | 853 | kzalloc(sizeof (struct vicam_camera), GFP_KERNEL)) == NULL) { |
1da177e4 LT |
854 | printk(KERN_WARNING |
855 | "could not allocate kernel memory for vicam_camera struct\n"); | |
856 | return -ENOMEM; | |
857 | } | |
858 | ||
1da177e4 LT |
859 | |
860 | cam->shutter_speed = 15; | |
861 | ||
4186ecf8 | 862 | mutex_init(&cam->cam_lock); |
1da177e4 | 863 | |
601e9444 HV |
864 | memcpy(&cam->vdev, &vicam_template, sizeof(vicam_template)); |
865 | video_set_drvdata(&cam->vdev, cam); | |
1da177e4 LT |
866 | |
867 | cam->udev = dev; | |
868 | cam->bulkEndpoint = bulkEndpoint; | |
869 | ||
dc60de33 | 870 | if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1) < 0) { |
1da177e4 LT |
871 | kfree(cam); |
872 | printk(KERN_WARNING "video_register_device failed\n"); | |
873 | return -EIO; | |
874 | } | |
875 | ||
c6330fb8 HV |
876 | printk(KERN_INFO "ViCam webcam driver now controlling video device %d\n", |
877 | cam->vdev.num); | |
1da177e4 LT |
878 | |
879 | usb_set_intfdata (intf, cam); | |
d56410e0 | 880 | |
1da177e4 LT |
881 | return 0; |
882 | } | |
883 | ||
884 | static void | |
885 | vicam_disconnect(struct usb_interface *intf) | |
886 | { | |
887 | int open_count; | |
888 | struct vicam_camera *cam = usb_get_intfdata (intf); | |
889 | usb_set_intfdata (intf, NULL); | |
890 | ||
891 | /* we must unregister the device before taking its | |
892 | * cam_lock. This is because the video open call | |
893 | * holds the same lock as video unregister. if we | |
894 | * unregister inside of the cam_lock and open also | |
895 | * uses the cam_lock, we get deadlock. | |
896 | */ | |
897 | ||
898 | video_unregister_device(&cam->vdev); | |
899 | ||
900 | /* stop the camera from being used */ | |
901 | ||
4186ecf8 | 902 | mutex_lock(&cam->cam_lock); |
1da177e4 LT |
903 | |
904 | /* mark the camera as gone */ | |
905 | ||
906 | cam->udev = NULL; | |
907 | ||
1da177e4 LT |
908 | /* the only thing left to do is synchronize with |
909 | * our close/release function on who should release | |
910 | * the camera memory. if there are any users using the | |
911 | * camera, it's their job. if there are no users, | |
912 | * it's ours. | |
913 | */ | |
914 | ||
915 | open_count = cam->open_count; | |
916 | ||
4186ecf8 | 917 | mutex_unlock(&cam->cam_lock); |
1da177e4 LT |
918 | |
919 | if (!open_count) { | |
920 | kfree(cam); | |
921 | } | |
922 | ||
923 | printk(KERN_DEBUG "ViCam-based WebCam disconnected\n"); | |
924 | } | |
925 | ||
926 | /* | |
927 | */ | |
928 | static int __init | |
929 | usb_vicam_init(void) | |
930 | { | |
931 | int retval; | |
932 | DBG(KERN_INFO "ViCam-based WebCam driver startup\n"); | |
1da177e4 LT |
933 | retval = usb_register(&vicam_driver); |
934 | if (retval) | |
935 | printk(KERN_WARNING "usb_register failed!\n"); | |
936 | return retval; | |
937 | } | |
938 | ||
939 | static void __exit | |
940 | usb_vicam_exit(void) | |
941 | { | |
942 | DBG(KERN_INFO | |
943 | "ViCam-based WebCam driver shutdown\n"); | |
944 | ||
945 | usb_deregister(&vicam_driver); | |
1da177e4 LT |
946 | } |
947 | ||
948 | module_init(usb_vicam_init); | |
949 | module_exit(usb_vicam_exit); | |
950 | ||
951 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
952 | MODULE_DESCRIPTION(DRIVER_DESC); | |
953 | MODULE_LICENSE("GPL"); | |
fb54be87 | 954 | MODULE_FIRMWARE("vicam/firmware.fw"); |