1/* 2 * STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net) 3 * 4 * Thanks to STMicroelectronics for information on the usb commands, and 5 * to Steve Miller at STM for his help and encouragement while I was 6 * writing this driver. 7 * 8 * This driver is based heavily on the 9 * Endpoints (formerly known as AOX) se401 USB Camera Driver 10 * Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org) 11 * 12 * Still somewhat based on the Linux ov511 driver. 13 * 14 * This program is free software; you can redistribute it and/or modify it 15 * under the terms of the GNU General Public License as published by the 16 * Free Software Foundation; either version 2 of the License, or (at your 17 * option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, but 20 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 21 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 22 * for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software Foundation, 26 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 * 28 * History: 29 * ver 0.1 October, 2001. Initial attempt. 30 * 31 * ver 0.2 November, 2001. Fixed asbility to resize, added brightness 32 * function, made more stable (?) 33 * 34 * ver 0.21 Nov, 2001. Added gamma correction and white balance, 35 * due to Alexander Schwartz. Still trying to 36 * improve stablility. Moved stuff into stv680.h 37 * 38 * ver 0.22 Nov, 2001. Added sharpen function (by Michael Sweet, 39 * mike@easysw.com) from GIMP, also used in pencam. 40 * Simple, fast, good integer math routine. 41 * 42 * ver 0.23 Dec, 2001 (gkh) 43 * Took out sharpen function, ran code through 44 * Lindent, and did other minor tweaks to get 45 * things to work properly with 2.5.1 46 * 47 * ver 0.24 Jan, 2002 (kjs) 48 * Fixed the problem with webcam crashing after 49 * two pictures. Changed the way pic is halved to 50 * improve quality. Got rid of green line around 51 * frame. Fix brightness reset when changing size 52 * bug. Adjusted gamma filters slightly. 53 * 54 * ver 0.25 Jan, 2002 (kjs) 55 * Fixed a bug in which the driver sometimes attempted 56 * to set to a non-supported size. This allowed 57 * gnomemeeting to work. 58 * Fixed proc entry removal bug. 59 */ 60 61#include <linux/module.h> 62#include <linux/init.h> 63#include <linux/vmalloc.h> 64#include <linux/slab.h> 65#include <linux/pagemap.h> 66#include <linux/errno.h> 67#include <linux/videodev.h> 68#include <media/v4l2-common.h> 69#include <linux/usb.h> 70#include <linux/mutex.h> 71 72#include "stv680.h" 73 74static int video_nr = -1; 75static int swapRGB = 0; /* default for auto sleect */ 76static int swapRGB_on = 0; /* default to allow auto select; -1=swap never, +1= swap always */ 77 78static unsigned int debug = 0; 79 80#define PDEBUG(level, fmt, args...) \ 81 do { \ 82 if (debug >= level) \ 83 info("[%s:%d] " fmt, __FUNCTION__, __LINE__ , ## args); \ 84 } while (0) 85 86 87/* 88 * Version Information 89 */ 90#define DRIVER_VERSION "v0.25" 91#define DRIVER_AUTHOR "Kevin Sisson <kjsisson@bellsouth.net>" 92#define DRIVER_DESC "STV0680 USB Camera Driver" 93 94MODULE_AUTHOR (DRIVER_AUTHOR); 95MODULE_DESCRIPTION (DRIVER_DESC); 96MODULE_LICENSE ("GPL"); 97module_param(debug, int, S_IRUGO | S_IWUSR); 98MODULE_PARM_DESC (debug, "Debug enabled or not"); 99module_param(swapRGB_on, int, 0); 100MODULE_PARM_DESC (swapRGB_on, "Red/blue swap: 1=always, 0=auto, -1=never"); 101module_param(video_nr, int, 0); 102 103/******************************************************************** 104 * 105 * Memory management 106 * 107 * This is a shameless copy from the USB-cpia driver (linux kernel 108 * version 2.3.29 or so, I have no idea what this code actually does ;). 109 * Actually it seems to be a copy of a shameless copy of the bttv-driver. 110 * Or that is a copy of a shameless copy of ... (To the powers: is there 111 * no generic kernel-function to do this sort of stuff?) 112 * 113 * Yes, it was a shameless copy from the bttv-driver. IIRC, Alan says 114 * there will be one, but apparentely not yet -jerdfelt 115 * 116 * So I copied it again for the ov511 driver -claudio 117 * 118 * Same for the se401 driver -Jeroen 119 * 120 * And the STV0680 driver - Kevin 121 ********************************************************************/ 122static void *rvmalloc (unsigned long size) 123{ 124 void *mem; 125 unsigned long adr; 126 127 size = PAGE_ALIGN(size); 128 mem = vmalloc_32 (size); 129 if (!mem) 130 return NULL; 131 132 memset (mem, 0, size); /* Clear the ram out, no junk to the user */ 133 adr = (unsigned long) mem; 134 while (size > 0) { 135 SetPageReserved(vmalloc_to_page((void *)adr)); 136 adr += PAGE_SIZE; 137 size -= PAGE_SIZE; 138 } 139 return mem; 140} 141 142static void rvfree (void *mem, unsigned long size) 143{ 144 unsigned long adr; 145 146 if (!mem) 147 return; 148 149 adr = (unsigned long) mem; 150 while ((long) size > 0) { 151 ClearPageReserved(vmalloc_to_page((void *)adr)); 152 adr += PAGE_SIZE; 153 size -= PAGE_SIZE; 154 } 155 vfree (mem); 156} 157 158 159/********************************************************************* 160 * pencam read/write functions 161 ********************************************************************/ 162 163static int stv_sndctrl (int set, struct usb_stv *stv680, unsigned short req, unsigned short value, unsigned char *buffer, int size) 164{ 165 int ret = -1; 166 167 switch (set) { 168 case 0: /* 0xc1 */ 169 ret = usb_control_msg (stv680->udev, 170 usb_rcvctrlpipe (stv680->udev, 0), 171 req, 172 (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT), 173 value, 0, buffer, size, PENCAM_TIMEOUT); 174 break; 175 176 case 1: /* 0x41 */ 177 ret = usb_control_msg (stv680->udev, 178 usb_sndctrlpipe (stv680->udev, 0), 179 req, 180 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT), 181 value, 0, buffer, size, PENCAM_TIMEOUT); 182 break; 183 184 case 2: /* 0x80 */ 185 ret = usb_control_msg (stv680->udev, 186 usb_rcvctrlpipe (stv680->udev, 0), 187 req, 188 (USB_DIR_IN | USB_RECIP_DEVICE), 189 value, 0, buffer, size, PENCAM_TIMEOUT); 190 break; 191 192 case 3: /* 0x40 */ 193 ret = usb_control_msg (stv680->udev, 194 usb_sndctrlpipe (stv680->udev, 0), 195 req, 196 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE), 197 value, 0, buffer, size, PENCAM_TIMEOUT); 198 break; 199 200 } 201 if ((ret < 0) && (req != 0x0a)) { 202 PDEBUG (1, "STV(e): usb_control_msg error %i, request = 0x%x, error = %i", set, req, ret); 203 } 204 return ret; 205} 206 207static int stv_set_config (struct usb_stv *dev, int configuration, int interface, int alternate) 208{ 209 210 if (configuration != dev->udev->actconfig->desc.bConfigurationValue 211 || usb_reset_configuration (dev->udev) < 0) { 212 PDEBUG (1, "STV(e): FAILED to reset configuration %i", configuration); 213 return -1; 214 } 215 if (usb_set_interface (dev->udev, interface, alternate) < 0) { 216 PDEBUG (1, "STV(e): FAILED to set alternate interface %i", alternate); 217 return -1; 218 } 219 return 0; 220} 221 222static int stv_stop_video (struct usb_stv *dev) 223{ 224 int i; 225 unsigned char *buf; 226 227 buf = kmalloc (40, GFP_KERNEL); 228 if (buf == NULL) { 229 PDEBUG (0, "STV(e): Out of (small buf) memory"); 230 return -1; 231 } 232 233 /* this is a high priority command; it stops all lower order commands */ 234 if ((i = stv_sndctrl (1, dev, 0x04, 0x0000, buf, 0x0)) < 0) { 235 i = stv_sndctrl (0, dev, 0x80, 0, buf, 0x02); /* Get Last Error; 2 = busy */ 236 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buf[0], buf[1]); 237 } else { 238 PDEBUG (1, "STV(i): Camera reset to idle mode."); 239 } 240 241 if ((i = stv_set_config (dev, 1, 0, 0)) < 0) 242 PDEBUG (1, "STV(e): Reset config during exit failed"); 243 244 /* get current mode */ 245 buf[0] = 0xf0; 246 if ((i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08)) != 0x08) /* get mode */ 247 PDEBUG (0, "STV(e): Stop_video: problem setting original mode"); 248 if (dev->origMode != buf[0]) { 249 memset (buf, 0, 8); 250 buf[0] = (unsigned char) dev->origMode; 251 if ((i = stv_sndctrl (3, dev, 0x07, 0x0100, buf, 0x08)) != 0x08) { 252 PDEBUG (0, "STV(e): Stop_video: Set_Camera_Mode failed"); 253 i = -1; 254 } 255 buf[0] = 0xf0; 256 i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08); 257 if ((i != 0x08) || (buf[0] != dev->origMode)) { 258 PDEBUG (0, "STV(e): camera NOT set to original resolution."); 259 i = -1; 260 } else 261 PDEBUG (0, "STV(i): Camera set to original resolution"); 262 } 263 /* origMode */ 264 kfree(buf); 265 return i; 266} 267 268static int stv_set_video_mode (struct usb_stv *dev) 269{ 270 int i, stop_video = 1; 271 unsigned char *buf; 272 273 buf = kmalloc (40, GFP_KERNEL); 274 if (buf == NULL) { 275 PDEBUG (0, "STV(e): Out of (small buf) memory"); 276 return -1; 277 } 278 279 if ((i = stv_set_config (dev, 1, 0, 0)) < 0) { 280 kfree(buf); 281 return i; 282 } 283 284 i = stv_sndctrl (2, dev, 0x06, 0x0100, buf, 0x12); 285 if (!(i > 0) && (buf[8] == 0x53) && (buf[9] == 0x05)) { 286 PDEBUG (1, "STV(e): Could not get descriptor 0100."); 287 goto error; 288 } 289 290 /* set alternate interface 1 */ 291 if ((i = stv_set_config (dev, 1, 0, 1)) < 0) 292 goto error; 293 294 if ((i = stv_sndctrl (0, dev, 0x85, 0, buf, 0x10)) != 0x10) 295 goto error; 296 PDEBUG (1, "STV(i): Setting video mode."); 297 /* Switch to Video mode: 0x0100 = VGA (640x480), 0x0000 = CIF (352x288) 0x0300 = QVGA (320x240) */ 298 if ((i = stv_sndctrl (1, dev, 0x09, dev->VideoMode, buf, 0x0)) < 0) { 299 stop_video = 0; 300 goto error; 301 } 302 goto exit; 303 304error: 305 kfree(buf); 306 if (stop_video == 1) 307 stv_stop_video (dev); 308 return -1; 309 310exit: 311 kfree(buf); 312 return 0; 313} 314 315static int stv_init (struct usb_stv *stv680) 316{ 317 int i = 0; 318 unsigned char *buffer; 319 unsigned long int bufsize; 320 321 buffer = kzalloc (40, GFP_KERNEL); 322 if (buffer == NULL) { 323 PDEBUG (0, "STV(e): Out of (small buf) memory"); 324 return -1; 325 } 326 udelay (100); 327 328 /* set config 1, interface 0, alternate 0 */ 329 if ((i = stv_set_config (stv680, 1, 0, 0)) < 0) { 330 kfree(buffer); 331 PDEBUG (0, "STV(e): set config 1,0,0 failed"); 332 return -1; 333 } 334 /* ping camera to be sure STV0680 is present */ 335 if ((i = stv_sndctrl (0, stv680, 0x88, 0x5678, buffer, 0x02)) != 0x02) 336 goto error; 337 if ((buffer[0] != 0x56) || (buffer[1] != 0x78)) { 338 PDEBUG (1, "STV(e): camera ping failed!!"); 339 goto error; 340 } 341 342 /* get camera descriptor */ 343 if ((i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x09)) != 0x09) 344 goto error; 345 i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x22); 346 if (!(i >= 0) && (buffer[7] == 0xa0) && (buffer[8] == 0x23)) { 347 PDEBUG (1, "STV(e): Could not get descriptor 0200."); 348 goto error; 349 } 350 if ((i = stv_sndctrl (0, stv680, 0x8a, 0, buffer, 0x02)) != 0x02) 351 goto error; 352 if ((i = stv_sndctrl (0, stv680, 0x8b, 0, buffer, 0x24)) != 0x24) 353 goto error; 354 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10) 355 goto error; 356 357 stv680->SupportedModes = buffer[7]; 358 i = stv680->SupportedModes; 359 stv680->CIF = 0; 360 stv680->VGA = 0; 361 stv680->QVGA = 0; 362 if (i & 1) 363 stv680->CIF = 1; 364 if (i & 2) 365 stv680->VGA = 1; 366 if (i & 8) 367 stv680->QVGA = 1; 368 if (stv680->SupportedModes == 0) { 369 PDEBUG (0, "STV(e): There are NO supported STV680 modes!!"); 370 i = -1; 371 goto error; 372 } else { 373 if (stv680->CIF) 374 PDEBUG (0, "STV(i): CIF is supported"); 375 if (stv680->QVGA) 376 PDEBUG (0, "STV(i): QVGA is supported"); 377 } 378 /* FW rev, ASIC rev, sensor ID */ 379 PDEBUG (1, "STV(i): Firmware rev is %i.%i", buffer[0], buffer[1]); 380 PDEBUG (1, "STV(i): ASIC rev is %i.%i", buffer[2], buffer[3]); 381 PDEBUG (1, "STV(i): Sensor ID is %i", (buffer[4]*16) + (buffer[5]>>4)); 382 383 /* set alternate interface 1 */ 384 if ((i = stv_set_config (stv680, 1, 0, 1)) < 0) 385 goto error; 386 387 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10) 388 goto error; 389 if ((i = stv_sndctrl (0, stv680, 0x8d, 0, buffer, 0x08)) != 0x08) 390 goto error; 391 i = buffer[3]; 392 PDEBUG (0, "STV(i): Camera has %i pictures.", i); 393 394 /* get current mode */ 395 if ((i = stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08)) != 0x08) 396 goto error; 397 stv680->origMode = buffer[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */ 398 399 /* This will attemp CIF mode, if supported. If not, set to QVGA */ 400 memset (buffer, 0, 8); 401 if (stv680->CIF) 402 buffer[0] = 0x00; 403 else if (stv680->QVGA) 404 buffer[0] = 0x03; 405 if ((i = stv_sndctrl (3, stv680, 0x07, 0x0100, buffer, 0x08)) != 0x08) { 406 PDEBUG (0, "STV(i): Set_Camera_Mode failed"); 407 i = -1; 408 goto error; 409 } 410 buffer[0] = 0xf0; 411 stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08); 412 if (((stv680->CIF == 1) && (buffer[0] != 0x00)) || ((stv680->QVGA == 1) && (buffer[0] != 0x03))) { 413 PDEBUG (0, "STV(e): Error setting camera video mode!"); 414 i = -1; 415 goto error; 416 } else { 417 if (buffer[0] == 0) { 418 stv680->VideoMode = 0x0000; 419 PDEBUG (0, "STV(i): Video Mode set to CIF"); 420 } 421 if (buffer[0] == 0x03) { 422 stv680->VideoMode = 0x0300; 423 PDEBUG (0, "STV(i): Video Mode set to QVGA"); 424 } 425 } 426 if ((i = stv_sndctrl (0, stv680, 0x8f, 0, buffer, 0x10)) != 0x10) 427 goto error; 428 bufsize = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | (buffer[3]); 429 stv680->cwidth = (buffer[4] << 8) | (buffer[5]); /* ->camera = 322, 356, 644 */ 430 stv680->cheight = (buffer[6] << 8) | (buffer[7]); /* ->camera = 242, 292, 484 */ 431 stv680->origGain = buffer[12]; 432 433 goto exit; 434 435error: 436 i = stv_sndctrl (0, stv680, 0x80, 0, buffer, 0x02); /* Get Last Error */ 437 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buffer[0], buffer[1]); 438 kfree(buffer); 439 return -1; 440 441exit: 442 kfree(buffer); 443 444 /* video = 320x240, 352x288 */ 445 if (stv680->CIF == 1) { 446 stv680->maxwidth = 352; 447 stv680->maxheight = 288; 448 stv680->vwidth = 352; 449 stv680->vheight = 288; 450 } 451 if (stv680->QVGA == 1) { 452 stv680->maxwidth = 320; 453 stv680->maxheight = 240; 454 stv680->vwidth = 320; 455 stv680->vheight = 240; 456 } 457 458 stv680->rawbufsize = bufsize; /* must be ./. by 8 */ 459 stv680->maxframesize = bufsize * 3; /* RGB size */ 460 PDEBUG (2, "STV(i): cwidth = %i, cheight = %i", stv680->cwidth, stv680->cheight); 461 PDEBUG (1, "STV(i): width = %i, height = %i, rawbufsize = %li", stv680->vwidth, stv680->vheight, stv680->rawbufsize); 462 463 /* some default values */ 464 stv680->bulk_in_endpointAddr = 0x82; 465 stv680->dropped = 0; 466 stv680->error = 0; 467 stv680->framecount = 0; 468 stv680->readcount = 0; 469 stv680->streaming = 0; 470 /* bright, white, colour, hue, contrast are set by software, not in stv0680 */ 471 stv680->brightness = 32767; 472 stv680->chgbright = 0; 473 stv680->whiteness = 0; /* only for greyscale */ 474 stv680->colour = 32767; 475 stv680->contrast = 32767; 476 stv680->hue = 32767; 477 stv680->palette = STV_VIDEO_PALETTE; 478 stv680->depth = 24; /* rgb24 bits */ 479 if ((swapRGB_on == 0) && (swapRGB == 0)) 480 PDEBUG (1, "STV(i): swapRGB is (auto) OFF"); 481 else if ((swapRGB_on == 0) && (swapRGB == 1)) 482 PDEBUG (1, "STV(i): swapRGB is (auto) ON"); 483 else if (swapRGB_on == 1) 484 PDEBUG (1, "STV(i): swapRGB is (forced) ON"); 485 else if (swapRGB_on == -1) 486 PDEBUG (1, "STV(i): swapRGB is (forced) OFF"); 487 488 if (stv_set_video_mode (stv680) < 0) { 489 PDEBUG (0, "STV(e): Could not set video mode in stv_init"); 490 return -1; 491 } 492 493 return 0; 494} 495 496/***************** last of pencam routines *******************/ 497 498/**************************************************************************** 499 * sysfs 500 ***************************************************************************/ 501#define stv680_file(name, variable, field) \ 502static ssize_t show_##name(struct class_device *class_dev, char *buf) \ 503{ \ 504 struct video_device *vdev = to_video_device(class_dev); \ 505 struct usb_stv *stv = video_get_drvdata(vdev); \ 506 return sprintf(buf, field, stv->variable); \ 507} \ 508static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); 509 510stv680_file(model, camera_name, "%s\n"); 511stv680_file(in_use, user, "%d\n"); 512stv680_file(streaming, streaming, "%d\n"); 513stv680_file(palette, palette, "%i\n"); 514stv680_file(frames_total, readcount, "%d\n"); 515stv680_file(frames_read, framecount, "%d\n"); 516stv680_file(packets_dropped, dropped, "%d\n"); 517stv680_file(decoding_errors, error, "%d\n"); 518 519static int stv680_create_sysfs_files(struct video_device *vdev) 520{ 521 int rc; 522 523 rc = video_device_create_file(vdev, &class_device_attr_model); 524 if (rc) goto err; 525 rc = video_device_create_file(vdev, &class_device_attr_in_use); 526 if (rc) goto err_model; 527 rc = video_device_create_file(vdev, &class_device_attr_streaming); 528 if (rc) goto err_inuse; 529 rc = video_device_create_file(vdev, &class_device_attr_palette); 530 if (rc) goto err_stream; 531 rc = video_device_create_file(vdev, &class_device_attr_frames_total); 532 if (rc) goto err_pal; 533 rc = video_device_create_file(vdev, &class_device_attr_frames_read); 534 if (rc) goto err_framtot; 535 rc = video_device_create_file(vdev, &class_device_attr_packets_dropped); 536 if (rc) goto err_framread; 537 rc = video_device_create_file(vdev, &class_device_attr_decoding_errors); 538 if (rc) goto err_dropped; 539 540 return 0; 541 542err_dropped: 543 video_device_remove_file(vdev, &class_device_attr_packets_dropped); 544err_framread: 545 video_device_remove_file(vdev, &class_device_attr_frames_read); 546err_framtot: 547 video_device_remove_file(vdev, &class_device_attr_frames_total); 548err_pal: 549 video_device_remove_file(vdev, &class_device_attr_palette); 550err_stream: 551 video_device_remove_file(vdev, &class_device_attr_streaming); 552err_inuse: 553 video_device_remove_file(vdev, &class_device_attr_in_use); 554err_model: 555 video_device_remove_file(vdev, &class_device_attr_model); 556err: 557 return rc; 558} 559 560static void stv680_remove_sysfs_files(struct video_device *vdev) 561{ 562 video_device_remove_file(vdev, &class_device_attr_model); 563 video_device_remove_file(vdev, &class_device_attr_in_use); 564 video_device_remove_file(vdev, &class_device_attr_streaming); 565 video_device_remove_file(vdev, &class_device_attr_palette); 566 video_device_remove_file(vdev, &class_device_attr_frames_total); 567 video_device_remove_file(vdev, &class_device_attr_frames_read); 568 video_device_remove_file(vdev, &class_device_attr_packets_dropped); 569 video_device_remove_file(vdev, &class_device_attr_decoding_errors); 570} 571 572/******************************************************************** 573 * Camera control 574 *******************************************************************/ 575 576static int stv680_get_pict (struct usb_stv *stv680, struct video_picture *p) 577{ 578 /* This sets values for v4l interface. max/min = 65535/0 */ 579 580 p->brightness = stv680->brightness; 581 p->whiteness = stv680->whiteness; /* greyscale */ 582 p->colour = stv680->colour; 583 p->contrast = stv680->contrast; 584 p->hue = stv680->hue; 585 p->palette = stv680->palette; 586 p->depth = stv680->depth; 587 return 0; 588} 589 590static int stv680_set_pict (struct usb_stv *stv680, struct video_picture *p) 591{ 592 /* See above stv680_get_pict */ 593 594 if (p->palette != STV_VIDEO_PALETTE) { 595 PDEBUG (2, "STV(e): Palette set error in _set_pic"); 596 return 1; 597 } 598 599 if (stv680->brightness != p->brightness) { 600 stv680->chgbright = 1; 601 stv680->brightness = p->brightness; 602 } 603 604 stv680->whiteness = p->whiteness; /* greyscale */ 605 stv680->colour = p->colour; 606 stv680->contrast = p->contrast; 607 stv680->hue = p->hue; 608 stv680->palette = p->palette; 609 stv680->depth = p->depth; 610 611 return 0; 612} 613 614static void stv680_video_irq (struct urb *urb) 615{ 616 struct usb_stv *stv680 = urb->context; 617 int length = urb->actual_length; 618 619 if (length < stv680->rawbufsize) 620 PDEBUG (2, "STV(i): Lost data in transfer: exp %li, got %i", stv680->rawbufsize, length); 621 622 /* ohoh... */ 623 if (!stv680->streaming) 624 return; 625 626 if (!stv680->udev) { 627 PDEBUG (0, "STV(e): device vapourished in video_irq"); 628 return; 629 } 630 631 /* 0 sized packets happen if we are to fast, but sometimes the camera 632 keeps sending them forever... 633 */ 634 if (length && !urb->status) { 635 stv680->nullpackets = 0; 636 switch (stv680->scratch[stv680->scratch_next].state) { 637 case BUFFER_READY: 638 case BUFFER_BUSY: 639 stv680->dropped++; 640 break; 641 642 case BUFFER_UNUSED: 643 memcpy (stv680->scratch[stv680->scratch_next].data, 644 (unsigned char *) urb->transfer_buffer, length); 645 stv680->scratch[stv680->scratch_next].state = BUFFER_READY; 646 stv680->scratch[stv680->scratch_next].length = length; 647 if (waitqueue_active (&stv680->wq)) { 648 wake_up_interruptible (&stv680->wq); 649 } 650 stv680->scratch_overflow = 0; 651 stv680->scratch_next++; 652 if (stv680->scratch_next >= STV680_NUMSCRATCH) 653 stv680->scratch_next = 0; 654 break; 655 } /* switch */ 656 } else { 657 stv680->nullpackets++; 658 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) { 659 if (waitqueue_active (&stv680->wq)) { 660 wake_up_interruptible (&stv680->wq); 661 } 662 } 663 } /* if - else */ 664 665 /* Resubmit urb for new data */ 666 urb->status = 0; 667 urb->dev = stv680->udev; 668 if (usb_submit_urb (urb, GFP_ATOMIC)) 669 PDEBUG (0, "STV(e): urb burned down in video irq"); 670 return; 671} /* _video_irq */ 672 673static int stv680_start_stream (struct usb_stv *stv680) 674{ 675 struct urb *urb; 676 int err = 0, i; 677 678 stv680->streaming = 1; 679 680 /* Do some memory allocation */ 681 for (i = 0; i < STV680_NUMFRAMES; i++) { 682 stv680->frame[i].data = stv680->fbuf + i * stv680->maxframesize; 683 stv680->frame[i].curpix = 0; 684 } 685 /* packet size = 4096 */ 686 for (i = 0; i < STV680_NUMSBUF; i++) { 687 stv680->sbuf[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL); 688 if (stv680->sbuf[i].data == NULL) { 689 PDEBUG (0, "STV(e): Could not kmalloc raw data buffer %i", i); 690 goto nomem_err; 691 } 692 } 693 694 stv680->scratch_next = 0; 695 stv680->scratch_use = 0; 696 stv680->scratch_overflow = 0; 697 for (i = 0; i < STV680_NUMSCRATCH; i++) { 698 stv680->scratch[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL); 699 if (stv680->scratch[i].data == NULL) { 700 PDEBUG (0, "STV(e): Could not kmalloc raw scratch buffer %i", i); 701 goto nomem_err; 702 } 703 stv680->scratch[i].state = BUFFER_UNUSED; 704 } 705 706 for (i = 0; i < STV680_NUMSBUF; i++) { 707 urb = usb_alloc_urb (0, GFP_KERNEL); 708 if (!urb) 709 goto nomem_err; 710 711 /* sbuf is urb->transfer_buffer, later gets memcpyed to scratch */ 712 usb_fill_bulk_urb (urb, stv680->udev, 713 usb_rcvbulkpipe (stv680->udev, stv680->bulk_in_endpointAddr), 714 stv680->sbuf[i].data, stv680->rawbufsize, 715 stv680_video_irq, stv680); 716 stv680->urb[i] = urb; 717 err = usb_submit_urb (stv680->urb[i], GFP_KERNEL); 718 if (err) 719 PDEBUG (0, "STV(e): urb burned down in start stream"); 720 } /* i STV680_NUMSBUF */ 721 722 stv680->framecount = 0; 723 return 0; 724 725 nomem_err: 726 for (i = 0; i < STV680_NUMSCRATCH; i++) { 727 kfree(stv680->scratch[i].data); 728 stv680->scratch[i].data = NULL; 729 } 730 for (i = 0; i < STV680_NUMSBUF; i++) { 731 usb_kill_urb(stv680->urb[i]); 732 usb_free_urb(stv680->urb[i]); 733 stv680->urb[i] = NULL; 734 kfree(stv680->sbuf[i].data); 735 stv680->sbuf[i].data = NULL; 736 } 737 return -ENOMEM; 738 739} 740 741static int stv680_stop_stream (struct usb_stv *stv680) 742{ 743 int i; 744 745 if (!stv680->streaming || !stv680->udev) 746 return 1; 747 748 stv680->streaming = 0; 749 750 for (i = 0; i < STV680_NUMSBUF; i++) 751 if (stv680->urb[i]) { 752 usb_kill_urb (stv680->urb[i]); 753 usb_free_urb (stv680->urb[i]); 754 stv680->urb[i] = NULL; 755 kfree(stv680->sbuf[i].data); 756 } 757 for (i = 0; i < STV680_NUMSCRATCH; i++) { 758 kfree(stv680->scratch[i].data); 759 stv680->scratch[i].data = NULL; 760 } 761 762 return 0; 763} 764 765static int stv680_set_size (struct usb_stv *stv680, int width, int height) 766{ 767 int wasstreaming = stv680->streaming; 768 769 /* Check to see if we need to change */ 770 if ((stv680->vwidth == width) && (stv680->vheight == height)) 771 return 0; 772 773 PDEBUG (1, "STV(i): size request for %i x %i", width, height); 774 /* Check for a valid mode */ 775 if ((!width || !height) || ((width & 1) || (height & 1))) { 776 PDEBUG (1, "STV(e): set_size error: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight); 777 return 1; 778 } 779 780 if ((width < (stv680->maxwidth / 2)) || (height < (stv680->maxheight / 2))) { 781 width = stv680->maxwidth / 2; 782 height = stv680->maxheight / 2; 783 } else if ((width >= 158) && (width <= 166) && (stv680->QVGA == 1)) { 784 width = 160; 785 height = 120; 786 } else if ((width >= 172) && (width <= 180) && (stv680->CIF == 1)) { 787 width = 176; 788 height = 144; 789 } else if ((width >= 318) && (width <= 350) && (stv680->QVGA == 1)) { 790 width = 320; 791 height = 240; 792 } else if ((width >= 350) && (width <= 358) && (stv680->CIF == 1)) { 793 width = 352; 794 height = 288; 795 } else { 796 PDEBUG (1, "STV(e): request for non-supported size: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight); 797 return 1; 798 } 799 800 /* Stop a current stream and start it again at the new size */ 801 if (wasstreaming) 802 stv680_stop_stream (stv680); 803 stv680->vwidth = width; 804 stv680->vheight = height; 805 PDEBUG (1, "STV(i): size set to %i x %i", stv680->vwidth, stv680->vheight); 806 if (wasstreaming) 807 stv680_start_stream (stv680); 808 809 return 0; 810} 811 812/********************************************************************** 813 * Video Decoding 814 **********************************************************************/ 815 816/******* routines from the pencam program; hey, they work! ********/ 817 818/* 819 * STV0680 Vision Camera Chipset Driver 820 * Copyright (C) 2000 Adam Harrison <adam@antispin.org> 821*/ 822 823#define RED 0 824#define GREEN 1 825#define BLUE 2 826#define AD(x, y, w) (((y)*(w)+(x))*3) 827 828static void bayer_unshuffle (struct usb_stv *stv680, struct stv680_scratch *buffer) 829{ 830 int x, y, i; 831 int w = stv680->cwidth; 832 int vw = stv680->cwidth, vh = stv680->cheight; 833 unsigned int p = 0; 834 int colour = 0, bayer = 0; 835 unsigned char *raw = buffer->data; 836 struct stv680_frame *frame = &stv680->frame[stv680->curframe]; 837 unsigned char *output = frame->data; 838 unsigned char *temp = frame->data; 839 int offset = buffer->offset; 840 841 if (frame->curpix == 0) { 842 if (frame->grabstate == FRAME_READY) { 843 frame->grabstate = FRAME_GRABBING; 844 } 845 } 846 if (offset != frame->curpix) { /* Regard frame as lost :( */ 847 frame->curpix = 0; 848 stv680->error++; 849 return; 850 } 851 852 if ((stv680->vwidth == 320) || (stv680->vwidth == 160)) { 853 vw = 320; 854 vh = 240; 855 } 856 if ((stv680->vwidth == 352) || (stv680->vwidth == 176)) { 857 vw = 352; 858 vh = 288; 859 } 860 861 memset (output, 0, 3 * vw * vh); /* clear output matrix. */ 862 863 for (y = 0; y < vh; y++) { 864 for (x = 0; x < vw; x++) { 865 if (x & 1) 866 p = *(raw + y * w + (x >> 1)); 867 else 868 p = *(raw + y * w + (x >> 1) + (w >> 1)); 869 870 if (y & 1) 871 bayer = 2; 872 else 873 bayer = 0; 874 if (x & 1) 875 bayer++; 876 877 switch (bayer) { 878 case 0: 879 case 3: 880 colour = 1; 881 break; 882 case 1: 883 colour = 0; 884 break; 885 case 2: 886 colour = 2; 887 break; 888 } 889 i = (y * vw + x) * 3; 890 *(output + i + colour) = (unsigned char) p; 891 } /* for x */ 892 893 } /* for y */ 894 895 /****** gamma correction plus hardcoded white balance */ 896 /* Thanks to Alexander Schwartx <alexander.schwartx@gmx.net> for this code. 897 Correction values red[], green[], blue[], are generated by 898 (pow(i/256.0, GAMMA)*255.0)*white balanceRGB where GAMMA=0.55, 1<i<255. 899 White balance (RGB)= 1.0, 1.17, 1.48. Values are calculated as double float and 900 converted to unsigned char. Values are in stv680.h */ 901 902 for (y = 0; y < vh; y++) { 903 for (x = 0; x < vw; x++) { 904 i = (y * vw + x) * 3; 905 *(output + i) = red[*(output + i)]; 906 *(output + i + 1) = green[*(output + i + 1)]; 907 *(output + i + 2) = blue[*(output + i + 2)]; 908 } 909 } 910 911 /****** bayer demosaic ******/ 912 for (y = 1; y < (vh - 1); y++) { 913 for (x = 1; x < (vw - 1); x++) { /* work out pixel type */ 914 if (y & 1) 915 bayer = 0; 916 else 917 bayer = 2; 918 if (!(x & 1)) 919 bayer++; 920 921 switch (bayer) { 922 case 0: /* green. blue lr, red tb */ 923 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y, vw) + BLUE) + (int) *(output + AD (x + 1, y, vw) + BLUE)) >> 1; 924 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x, y - 1, vw) + RED) + (int) *(output + AD (x, y + 1, vw) + RED)) >> 1; 925 break; 926 927 case 1: /* blue. green lrtb, red diagonals */ 928 *(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2; 929 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y - 1, vw) + RED) + (int) *(output + AD (x - 1, y + 1, vw) + RED) + (int) *(output + AD (x + 1, y - 1, vw) + RED) + (int) *(output + AD (x + 1, y + 1, vw) + RED)) >> 2; 930 break; 931 932 case 2: /* red. green lrtb, blue diagonals */ 933 *(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2; 934 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y - 1, vw) + BLUE) + (int) *(output + AD (x + 1, y - 1, vw) + BLUE) + (int) *(output + AD (x - 1, y + 1, vw) + BLUE) + (int) *(output + AD (x + 1, y + 1, vw) + BLUE)) >> 2; 935 break; 936 937 case 3: /* green. red lr, blue tb */ 938 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y, vw) + RED) + (int) *(output + AD (x + 1, y, vw) + RED)) >> 1; 939 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x, y - 1, vw) + BLUE) + (int) *(output + AD (x, y + 1, vw) + BLUE)) >> 1; 940 break; 941 } /* switch */ 942 } /* for x */ 943 } /* for y - end demosaic */ 944 945 /* fix top and bottom row, left and right side */ 946 i = vw * 3; 947 memcpy (output, (output + i), i); 948 memcpy ((output + (vh * i)), (output + ((vh - 1) * i)), i); 949 for (y = 0; y < vh; y++) { 950 i = y * vw * 3; 951 memcpy ((output + i), (output + i + 3), 3); 952 memcpy ((output + i + (vw * 3)), (output + i + (vw - 1) * 3), 3); 953 } 954 955 /* process all raw data, then trim to size if necessary */ 956 if ((stv680->vwidth == 160) || (stv680->vwidth == 176)) { 957 i = 0; 958 for (y = 0; y < vh; y++) { 959 if (!(y & 1)) { 960 for (x = 0; x < vw; x++) { 961 p = (y * vw + x) * 3; 962 if (!(x & 1)) { 963 *(output + i) = *(output + p); 964 *(output + i + 1) = *(output + p + 1); 965 *(output + i + 2) = *(output + p + 2); 966 i += 3; 967 } 968 } /* for x */ 969 } 970 } /* for y */ 971 } 972 /* reset to proper width */ 973 if ((stv680->vwidth == 160)) { 974 vw = 160; 975 vh = 120; 976 } 977 if ((stv680->vwidth == 176)) { 978 vw = 176; 979 vh = 144; 980 } 981 982 /* output is RGB; some programs want BGR */ 983 /* swapRGB_on=0 -> program decides; swapRGB_on=1, always swap */ 984 /* swapRGB_on=-1, never swap */ 985 if (((swapRGB == 1) && (swapRGB_on != -1)) || (swapRGB_on == 1)) { 986 for (y = 0; y < vh; y++) { 987 for (x = 0; x < vw; x++) { 988 i = (y * vw + x) * 3; 989 *(temp) = *(output + i); 990 *(output + i) = *(output + i + 2); 991 *(output + i + 2) = *(temp); 992 } 993 } 994 } 995 /* brightness */ 996 if (stv680->chgbright == 1) { 997 if (stv680->brightness >= 32767) { 998 p = (stv680->brightness - 32767) / 256; 999 for (x = 0; x < (vw * vh * 3); x++) { 1000 if ((*(output + x) + (unsigned char) p) > 255) 1001 *(output + x) = 255; 1002 else 1003 *(output + x) += (unsigned char) p; 1004 } /* for */ 1005 } else { 1006 p = (32767 - stv680->brightness) / 256; 1007 for (x = 0; x < (vw * vh * 3); x++) { 1008 if ((unsigned char) p > *(output + x)) 1009 *(output + x) = 0; 1010 else 1011 *(output + x) -= (unsigned char) p; 1012 } /* for */ 1013 } /* else */ 1014 } 1015 /* if */ 1016 frame->curpix = 0; 1017 frame->curlinepix = 0; 1018 frame->grabstate = FRAME_DONE; 1019 stv680->framecount++; 1020 stv680->readcount++; 1021 if (stv680->frame[(stv680->curframe + 1) & (STV680_NUMFRAMES - 1)].grabstate == FRAME_READY) { 1022 stv680->curframe = (stv680->curframe + 1) & (STV680_NUMFRAMES - 1); 1023 } 1024 1025} /* bayer_unshuffle */ 1026 1027/******* end routines from the pencam program *********/ 1028 1029static int stv680_newframe (struct usb_stv *stv680, int framenr) 1030{ 1031 int errors = 0; 1032 1033 while (stv680->streaming && (stv680->frame[framenr].grabstate == FRAME_READY || stv680->frame[framenr].grabstate == FRAME_GRABBING)) { 1034 if (!stv680->frame[framenr].curpix) { 1035 errors++; 1036 } 1037 wait_event_interruptible (stv680->wq, (stv680->scratch[stv680->scratch_use].state == BUFFER_READY)); 1038 1039 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) { 1040 stv680->nullpackets = 0; 1041 PDEBUG (2, "STV(i): too many null length packets, restarting capture"); 1042 stv680_stop_stream (stv680); 1043 stv680_start_stream (stv680); 1044 } else { 1045 if (stv680->scratch[stv680->scratch_use].state != BUFFER_READY) { 1046 stv680->frame[framenr].grabstate = FRAME_ERROR; 1047 PDEBUG (2, "STV(e): FRAME_ERROR in _newframe"); 1048 return -EIO; 1049 } 1050 stv680->scratch[stv680->scratch_use].state = BUFFER_BUSY; 1051 1052 bayer_unshuffle (stv680, &stv680->scratch[stv680->scratch_use]); 1053 1054 stv680->scratch[stv680->scratch_use].state = BUFFER_UNUSED; 1055 stv680->scratch_use++; 1056 if (stv680->scratch_use >= STV680_NUMSCRATCH) 1057 stv680->scratch_use = 0; 1058 if (errors > STV680_MAX_ERRORS) { 1059 errors = 0; 1060 PDEBUG (2, "STV(i): too many errors, restarting capture"); 1061 stv680_stop_stream (stv680); 1062 stv680_start_stream (stv680); 1063 } 1064 } /* else */ 1065 } /* while */ 1066 return 0; 1067} 1068 1069/********************************************************************* 1070 * Video4Linux 1071 *********************************************************************/ 1072 1073static int stv_open (struct inode *inode, struct file *file) 1074{ 1075 struct video_device *dev = video_devdata(file); 1076 struct usb_stv *stv680 = video_get_drvdata(dev); 1077 int err = 0; 1078 1079 /* we are called with the BKL held */ 1080 stv680->user = 1; 1081 err = stv_init (stv680); /* main initialization routine for camera */ 1082 1083 if (err >= 0) { 1084 stv680->fbuf = rvmalloc (stv680->maxframesize * STV680_NUMFRAMES); 1085 if (!stv680->fbuf) { 1086 PDEBUG (0, "STV(e): Could not rvmalloc frame bufer"); 1087 err = -ENOMEM; 1088 } 1089 file->private_data = dev; 1090 } 1091 if (err) 1092 stv680->user = 0; 1093 1094 return err; 1095} 1096 1097static int stv_close (struct inode *inode, struct file *file) 1098{ 1099 struct video_device *dev = file->private_data; 1100 struct usb_stv *stv680 = video_get_drvdata(dev); 1101 int i; 1102 1103 for (i = 0; i < STV680_NUMFRAMES; i++) 1104 stv680->frame[i].grabstate = FRAME_UNUSED; 1105 if (stv680->streaming) 1106 stv680_stop_stream (stv680); 1107 1108 if ((i = stv_stop_video (stv680)) < 0) 1109 PDEBUG (1, "STV(e): stop_video failed in stv_close"); 1110 1111 rvfree (stv680->fbuf, stv680->maxframesize * STV680_NUMFRAMES); 1112 stv680->user = 0; 1113 1114 if (stv680->removed) { 1115 kfree(stv680); 1116 stv680 = NULL; 1117 PDEBUG (0, "STV(i): device unregistered"); 1118 } 1119 file->private_data = NULL; 1120 return 0; 1121} 1122 1123static int stv680_do_ioctl (struct inode *inode, struct file *file, 1124 unsigned int cmd, void *arg) 1125{ 1126 struct video_device *vdev = file->private_data; 1127 struct usb_stv *stv680 = video_get_drvdata(vdev); 1128 1129 if (!stv680->udev) 1130 return -EIO; 1131 1132 switch (cmd) { 1133 case VIDIOCGCAP:{ 1134 struct video_capability *b = arg; 1135 1136 strcpy (b->name, stv680->camera_name); 1137 b->type = VID_TYPE_CAPTURE; 1138 b->channels = 1; 1139 b->audios = 0; 1140 b->maxwidth = stv680->maxwidth; 1141 b->maxheight = stv680->maxheight; 1142 b->minwidth = stv680->maxwidth / 2; 1143 b->minheight = stv680->maxheight / 2; 1144 return 0; 1145 } 1146 case VIDIOCGCHAN:{ 1147 struct video_channel *v = arg; 1148 1149 if (v->channel != 0) 1150 return -EINVAL; 1151 v->flags = 0; 1152 v->tuners = 0; 1153 v->type = VIDEO_TYPE_CAMERA; 1154 strcpy (v->name, "STV Camera"); 1155 return 0; 1156 } 1157 case VIDIOCSCHAN:{ 1158 struct video_channel *v = arg; 1159 if (v->channel != 0) 1160 return -EINVAL; 1161 return 0; 1162 } 1163 case VIDIOCGPICT:{ 1164 struct video_picture *p = arg; 1165 1166 stv680_get_pict (stv680, p); 1167 return 0; 1168 } 1169 case VIDIOCSPICT:{ 1170 struct video_picture *p = arg; 1171 1172 if (stv680_set_pict (stv680, p)) 1173 return -EINVAL; 1174 return 0; 1175 } 1176 case VIDIOCSWIN:{ 1177 struct video_window *vw = arg; 1178 1179 if (vw->flags) 1180 return -EINVAL; 1181 if (vw->clipcount) 1182 return -EINVAL; 1183 if (vw->width != stv680->vwidth) { 1184 if (stv680_set_size (stv680, vw->width, vw->height)) { 1185 PDEBUG (2, "STV(e): failed (from user) set size in VIDIOCSWIN"); 1186 return -EINVAL; 1187 } 1188 } 1189 return 0; 1190 } 1191 case VIDIOCGWIN:{ 1192 struct video_window *vw = arg; 1193 1194 vw->x = 0; 1195 vw->y = 0; 1196 vw->chromakey = 0; 1197 vw->flags = 0; 1198 vw->clipcount = 0; 1199 vw->width = stv680->vwidth; 1200 vw->height = stv680->vheight; 1201 return 0; 1202 } 1203 case VIDIOCGMBUF:{ 1204 struct video_mbuf *vm = arg; 1205 int i; 1206 1207 memset (vm, 0, sizeof (*vm)); 1208 vm->size = STV680_NUMFRAMES * stv680->maxframesize; 1209 vm->frames = STV680_NUMFRAMES; 1210 for (i = 0; i < STV680_NUMFRAMES; i++) 1211 vm->offsets[i] = stv680->maxframesize * i; 1212 return 0; 1213 } 1214 case VIDIOCMCAPTURE:{ 1215 struct video_mmap *vm = arg; 1216 1217 if (vm->format != STV_VIDEO_PALETTE) { 1218 PDEBUG (2, "STV(i): VIDIOCMCAPTURE vm.format (%i) != VIDEO_PALETTE (%i)", 1219 vm->format, STV_VIDEO_PALETTE); 1220 if ((vm->format == 3) && (swapRGB_on == 0)) { 1221 PDEBUG (2, "STV(i): VIDIOCMCAPTURE swapRGB is (auto) ON"); 1222 /* this may fix those apps (e.g., xawtv) that want BGR */ 1223 swapRGB = 1; 1224 } 1225 return -EINVAL; 1226 } 1227 if (vm->frame >= STV680_NUMFRAMES) { 1228 PDEBUG (2, "STV(e): VIDIOCMCAPTURE vm.frame > NUMFRAMES"); 1229 return -EINVAL; 1230 } 1231 if ((stv680->frame[vm->frame].grabstate == FRAME_ERROR) 1232 || (stv680->frame[vm->frame].grabstate == FRAME_GRABBING)) { 1233 PDEBUG (2, "STV(e): VIDIOCMCAPTURE grabstate (%i) error", 1234 stv680->frame[vm->frame].grabstate); 1235 return -EBUSY; 1236 } 1237 /* Is this according to the v4l spec??? */ 1238 if (stv680->vwidth != vm->width) { 1239 if (stv680_set_size (stv680, vm->width, vm->height)) { 1240 PDEBUG (2, "STV(e): VIDIOCMCAPTURE set_size failed"); 1241 return -EINVAL; 1242 } 1243 } 1244 stv680->frame[vm->frame].grabstate = FRAME_READY; 1245 1246 if (!stv680->streaming) 1247 stv680_start_stream (stv680); 1248 1249 return 0; 1250 } 1251 case VIDIOCSYNC:{ 1252 int *frame = arg; 1253 int ret = 0; 1254 1255 if (*frame < 0 || *frame >= STV680_NUMFRAMES) { 1256 PDEBUG (2, "STV(e): Bad frame # in VIDIOCSYNC"); 1257 return -EINVAL; 1258 } 1259 ret = stv680_newframe (stv680, *frame); 1260 stv680->frame[*frame].grabstate = FRAME_UNUSED; 1261 return ret; 1262 } 1263 case VIDIOCGFBUF:{ 1264 struct video_buffer *vb = arg; 1265 1266 memset (vb, 0, sizeof (*vb)); 1267 return 0; 1268 } 1269 case VIDIOCKEY: 1270 return 0; 1271 case VIDIOCCAPTURE: 1272 { 1273 PDEBUG (2, "STV(e): VIDIOCCAPTURE failed"); 1274 return -EINVAL; 1275 } 1276 case VIDIOCSFBUF: 1277 case VIDIOCGTUNER: 1278 case VIDIOCSTUNER: 1279 case VIDIOCGFREQ: 1280 case VIDIOCSFREQ: 1281 case VIDIOCGAUDIO: 1282 case VIDIOCSAUDIO: 1283 return -EINVAL; 1284 default: 1285 return -ENOIOCTLCMD; 1286 } /* end switch */ 1287 1288 return 0; 1289} 1290 1291static int stv680_ioctl(struct inode *inode, struct file *file, 1292 unsigned int cmd, unsigned long arg) 1293{ 1294 return video_usercopy(inode, file, cmd, arg, stv680_do_ioctl); 1295} 1296 1297static int stv680_mmap (struct file *file, struct vm_area_struct *vma) 1298{ 1299 struct video_device *dev = file->private_data; 1300 struct usb_stv *stv680 = video_get_drvdata(dev); 1301 unsigned long start = vma->vm_start; 1302 unsigned long size = vma->vm_end-vma->vm_start; 1303 unsigned long page, pos; 1304 1305 mutex_lock(&stv680->lock); 1306 1307 if (stv680->udev == NULL) { 1308 mutex_unlock(&stv680->lock); 1309 return -EIO; 1310 } 1311 if (size > (((STV680_NUMFRAMES * stv680->maxframesize) + PAGE_SIZE - 1) 1312 & ~(PAGE_SIZE - 1))) { 1313 mutex_unlock(&stv680->lock); 1314 return -EINVAL; 1315 } 1316 pos = (unsigned long) stv680->fbuf; 1317 while (size > 0) { 1318 page = vmalloc_to_pfn((void *)pos); 1319 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) { 1320 mutex_unlock(&stv680->lock); 1321 return -EAGAIN; 1322 } 1323 start += PAGE_SIZE; 1324 pos += PAGE_SIZE; 1325 if (size > PAGE_SIZE) 1326 size -= PAGE_SIZE; 1327 else 1328 size = 0; 1329 } 1330 mutex_unlock(&stv680->lock); 1331 1332 return 0; 1333} 1334 1335static ssize_t stv680_read (struct file *file, char __user *buf, 1336 size_t count, loff_t *ppos) 1337{ 1338 struct video_device *dev = file->private_data; 1339 unsigned long int realcount = count; 1340 int ret = 0; 1341 struct usb_stv *stv680 = video_get_drvdata(dev); 1342 unsigned long int i; 1343 1344 if (STV680_NUMFRAMES != 2) { 1345 PDEBUG (0, "STV(e): STV680_NUMFRAMES needs to be 2!"); 1346 return -1; 1347 } 1348 if (stv680->udev == NULL) 1349 return -EIO; 1350 if (realcount > (stv680->vwidth * stv680->vheight * 3)) 1351 realcount = stv680->vwidth * stv680->vheight * 3; 1352 1353 /* Shouldn't happen: */ 1354 if (stv680->frame[0].grabstate == FRAME_GRABBING) { 1355 PDEBUG (2, "STV(e): FRAME_GRABBING in stv680_read"); 1356 return -EBUSY; 1357 } 1358 stv680->frame[0].grabstate = FRAME_READY; 1359 stv680->frame[1].grabstate = FRAME_UNUSED; 1360 stv680->curframe = 0; 1361 1362 if (!stv680->streaming) 1363 stv680_start_stream (stv680); 1364 1365 if (!stv680->streaming) { 1366 ret = stv680_newframe (stv680, 0); /* ret should = 0 */ 1367 } 1368 1369 ret = stv680_newframe (stv680, 0); 1370 1371 if (!ret) { 1372 if ((i = copy_to_user (buf, stv680->frame[0].data, realcount)) != 0) { 1373 PDEBUG (2, "STV(e): copy_to_user frame 0 failed, ret count = %li", i); 1374 return -EFAULT; 1375 } 1376 } else { 1377 realcount = ret; 1378 } 1379 stv680->frame[0].grabstate = FRAME_UNUSED; 1380 return realcount; 1381} /* stv680_read */ 1382 1383static const struct file_operations stv680_fops = { 1384 .owner = THIS_MODULE, 1385 .open = stv_open, 1386 .release = stv_close, 1387 .read = stv680_read, 1388 .mmap = stv680_mmap, 1389 .ioctl = stv680_ioctl, 1390 .compat_ioctl = v4l_compat_ioctl32, 1391 .llseek = no_llseek, 1392}; 1393static struct video_device stv680_template = { 1394 .owner = THIS_MODULE, 1395 .name = "STV0680 USB camera", 1396 .type = VID_TYPE_CAPTURE, 1397 .hardware = VID_HARDWARE_SE401, 1398 .fops = &stv680_fops, 1399 .release = video_device_release, 1400 .minor = -1, 1401}; 1402 1403static int stv680_probe (struct usb_interface *intf, const struct usb_device_id *id) 1404{ 1405 struct usb_device *dev = interface_to_usbdev(intf); 1406 struct usb_host_interface *interface; 1407 struct usb_stv *stv680 = NULL; 1408 char *camera_name = NULL; 1409 int retval = 0; 1410 1411 /* We don't handle multi-config cameras */ 1412 if (dev->descriptor.bNumConfigurations != 1) { 1413 PDEBUG (0, "STV(e): Number of Configurations != 1"); 1414 return -ENODEV; 1415 } 1416 1417 interface = &intf->altsetting[0]; 1418 /* Is it a STV680? */ 1419 if ((le16_to_cpu(dev->descriptor.idVendor) == USB_PENCAM_VENDOR_ID) && 1420 (le16_to_cpu(dev->descriptor.idProduct) == USB_PENCAM_PRODUCT_ID)) { 1421 camera_name = "STV0680"; 1422 PDEBUG (0, "STV(i): STV0680 camera found."); 1423 } else if ((le16_to_cpu(dev->descriptor.idVendor) == USB_CREATIVEGOMINI_VENDOR_ID) && 1424 (le16_to_cpu(dev->descriptor.idProduct) == USB_CREATIVEGOMINI_PRODUCT_ID)) { 1425 camera_name = "Creative WebCam Go Mini"; 1426 PDEBUG (0, "STV(i): Creative WebCam Go Mini found."); 1427 } else { 1428 PDEBUG (0, "STV(e): Vendor/Product ID do not match STV0680 or Creative WebCam Go Mini values."); 1429 PDEBUG (0, "STV(e): Check that the STV0680 or Creative WebCam Go Mini camera is connected to the computer."); 1430 retval = -ENODEV; 1431 goto error; 1432 } 1433 /* We found one */ 1434 if ((stv680 = kzalloc (sizeof (*stv680), GFP_KERNEL)) == NULL) { 1435 PDEBUG (0, "STV(e): couldn't kmalloc stv680 struct."); 1436 retval = -ENOMEM; 1437 goto error; 1438 } 1439 1440 stv680->udev = dev; 1441 stv680->camera_name = camera_name; 1442 1443 stv680->vdev = video_device_alloc(); 1444 if (!stv680->vdev) { 1445 retval = -ENOMEM; 1446 goto error; 1447 } 1448 memcpy(stv680->vdev, &stv680_template, sizeof(stv680_template)); 1449 stv680->vdev->dev = &intf->dev; 1450 video_set_drvdata(stv680->vdev, stv680); 1451 1452 memcpy (stv680->vdev->name, stv680->camera_name, strlen (stv680->camera_name)); 1453 init_waitqueue_head (&stv680->wq); 1454 mutex_init (&stv680->lock); 1455 wmb (); 1456 1457 if (video_register_device (stv680->vdev, VFL_TYPE_GRABBER, video_nr) == -1) { 1458 PDEBUG (0, "STV(e): video_register_device failed"); 1459 retval = -EIO; 1460 goto error_vdev; 1461 } 1462 PDEBUG (0, "STV(i): registered new video device: video%d", stv680->vdev->minor); 1463 1464 usb_set_intfdata (intf, stv680); 1465 retval = stv680_create_sysfs_files(stv680->vdev); 1466 if (retval) 1467 goto error_unreg; 1468 return 0; 1469 1470error_unreg: 1471 video_unregister_device(stv680->vdev); 1472error_vdev: 1473 video_device_release(stv680->vdev); 1474error: 1475 kfree(stv680); 1476 return retval; 1477} 1478 1479static inline void usb_stv680_remove_disconnected (struct usb_stv *stv680) 1480{ 1481 int i; 1482 1483 stv680->udev = NULL; 1484 stv680->frame[0].grabstate = FRAME_ERROR; 1485 stv680->frame[1].grabstate = FRAME_ERROR; 1486 stv680->streaming = 0; 1487 1488 wake_up_interruptible (&stv680->wq); 1489 1490 for (i = 0; i < STV680_NUMSBUF; i++) 1491 if (stv680->urb[i]) { 1492 usb_kill_urb (stv680->urb[i]); 1493 usb_free_urb (stv680->urb[i]); 1494 stv680->urb[i] = NULL; 1495 kfree(stv680->sbuf[i].data); 1496 } 1497 for (i = 0; i < STV680_NUMSCRATCH; i++) 1498 kfree(stv680->scratch[i].data); 1499 PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name); 1500 1501 /* Free the memory */ 1502 kfree(stv680); 1503} 1504 1505static void stv680_disconnect (struct usb_interface *intf) 1506{ 1507 struct usb_stv *stv680 = usb_get_intfdata (intf); 1508 1509 usb_set_intfdata (intf, NULL); 1510 1511 if (stv680) { 1512 /* We don't want people trying to open up the device */ 1513 if (stv680->vdev) { 1514 stv680_remove_sysfs_files(stv680->vdev); 1515 video_unregister_device(stv680->vdev); 1516 stv680->vdev = NULL; 1517 } 1518 if (!stv680->user) { 1519 usb_stv680_remove_disconnected (stv680); 1520 } else { 1521 stv680->removed = 1; 1522 } 1523 } 1524} 1525 1526static struct usb_driver stv680_driver = { 1527 .name = "stv680", 1528 .probe = stv680_probe, 1529 .disconnect = stv680_disconnect, 1530 .id_table = device_table 1531}; 1532 1533/******************************************************************** 1534 * Module routines 1535 ********************************************************************/ 1536 1537static int __init usb_stv680_init (void) 1538{ 1539 if (usb_register (&stv680_driver) < 0) { 1540 PDEBUG (0, "STV(e): Could not setup STV0680 driver"); 1541 return -1; 1542 } 1543 PDEBUG (0, "STV(i): usb camera driver version %s registering", DRIVER_VERSION); 1544 1545 info(DRIVER_DESC " " DRIVER_VERSION); 1546 return 0; 1547} 1548 1549static void __exit usb_stv680_exit (void) 1550{ 1551 usb_deregister (&stv680_driver); 1552 PDEBUG (0, "STV(i): driver deregistered"); 1553} 1554 1555module_init (usb_stv680_init); 1556module_exit (usb_stv680_exit); 1557