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