usbvision-video.c revision 9c39d7eafa366b807067697f7fc5b14d8b865179
1/* 2 * USB USBVISION Video device driver 0.9.9 3 * 4 * 5 * 6 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de> 7 * 8 * This module is part of usbvision driver project. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 23 * 24 * Let's call the version 0.... until compression decoding is completely 25 * implemented. 26 * 27 * This driver is written by Jose Ignacio Gijon and Joerg Heckenbach. 28 * It was based on USB CPiA driver written by Peter Pregler, 29 * Scott J. Bertin and Johannes Erdfelt 30 * Ideas are taken from bttv driver by Ralph Metzler, Marcus Metzler & 31 * Gerd Knorr and zoran 36120/36125 driver by Pauline Middelink 32 * Updates to driver completed by Dwaine P. Garden 33 * 34 * 35 * TODO: 36 * - use submit_urb for all setup packets 37 * - Fix memory settings for nt1004. It is 4 times as big as the 38 * nt1003 memory. 39 * - Add audio on endpoint 3 for nt1004 chip. 40 * Seems impossible, needs a codec interface. Which one? 41 * - Clean up the driver. 42 * - optimization for performance. 43 * - Add Videotext capability (VBI). Working on it..... 44 * - Check audio for other devices 45 * 46 */ 47 48#include <linux/version.h> 49#include <linux/kernel.h> 50#include <linux/list.h> 51#include <linux/timer.h> 52#include <linux/slab.h> 53#include <linux/mm.h> 54#include <linux/utsname.h> 55#include <linux/highmem.h> 56#include <linux/videodev.h> 57#include <linux/vmalloc.h> 58#include <linux/module.h> 59#include <linux/init.h> 60#include <linux/spinlock.h> 61#include <asm/io.h> 62#include <linux/videodev2.h> 63#include <linux/video_decoder.h> 64#include <linux/i2c.h> 65 66#include <media/saa7115.h> 67#include <media/v4l2-common.h> 68#include <media/v4l2-ioctl.h> 69#include <media/tuner.h> 70 71#include <linux/workqueue.h> 72 73#ifdef CONFIG_KMOD 74#include <linux/kmod.h> 75#endif 76 77#include "usbvision.h" 78#include "usbvision-cards.h" 79 80#define DRIVER_AUTHOR "Joerg Heckenbach <joerg@heckenbach-aw.de>,\ 81 Dwaine Garden <DwaineGarden@rogers.com>" 82#define DRIVER_NAME "usbvision" 83#define DRIVER_ALIAS "USBVision" 84#define DRIVER_DESC "USBVision USB Video Device Driver for Linux" 85#define DRIVER_LICENSE "GPL" 86#define USBVISION_DRIVER_VERSION_MAJOR 0 87#define USBVISION_DRIVER_VERSION_MINOR 9 88#define USBVISION_DRIVER_VERSION_PATCHLEVEL 9 89#define USBVISION_DRIVER_VERSION KERNEL_VERSION(USBVISION_DRIVER_VERSION_MAJOR,\ 90USBVISION_DRIVER_VERSION_MINOR,\ 91USBVISION_DRIVER_VERSION_PATCHLEVEL) 92#define USBVISION_VERSION_STRING __stringify(USBVISION_DRIVER_VERSION_MAJOR)\ 93 "." __stringify(USBVISION_DRIVER_VERSION_MINOR)\ 94 "." __stringify(USBVISION_DRIVER_VERSION_PATCHLEVEL) 95 96#define ENABLE_HEXDUMP 0 /* Enable if you need it */ 97 98 99#ifdef USBVISION_DEBUG 100 #define PDEBUG(level, fmt, args...) { \ 101 if (video_debug & (level)) \ 102 info("[%s:%d] " fmt, __func__, __LINE__ , ## args); \ 103 } 104#else 105 #define PDEBUG(level, fmt, args...) do {} while(0) 106#endif 107 108#define DBG_IO 1<<1 109#define DBG_PROBE 1<<2 110#define DBG_MMAP 1<<3 111 112//String operations 113#define rmspace(str) while(*str==' ') str++; 114#define goto2next(str) while(*str!=' ') str++; while(*str==' ') str++; 115 116 117/* sequential number of usbvision device */ 118static int usbvision_nr; 119 120static struct usbvision_v4l2_format_st usbvision_v4l2_format[] = { 121 { 1, 1, 8, V4L2_PIX_FMT_GREY , "GREY" }, 122 { 1, 2, 16, V4L2_PIX_FMT_RGB565 , "RGB565" }, 123 { 1, 3, 24, V4L2_PIX_FMT_RGB24 , "RGB24" }, 124 { 1, 4, 32, V4L2_PIX_FMT_RGB32 , "RGB32" }, 125 { 1, 2, 16, V4L2_PIX_FMT_RGB555 , "RGB555" }, 126 { 1, 2, 16, V4L2_PIX_FMT_YUYV , "YUV422" }, 127 { 1, 2, 12, V4L2_PIX_FMT_YVU420 , "YUV420P" }, // 1.5 ! 128 { 1, 2, 16, V4L2_PIX_FMT_YUV422P , "YUV422P" } 129}; 130 131/* Function prototypes */ 132static void usbvision_release(struct usb_usbvision *usbvision); 133 134/* Default initialization of device driver parameters */ 135/* Set the default format for ISOC endpoint */ 136static int isocMode = ISOC_MODE_COMPRESS; 137/* Set the default Debug Mode of the device driver */ 138static int video_debug; 139/* Set the default device to power on at startup */ 140static int PowerOnAtOpen = 1; 141/* Sequential Number of Video Device */ 142static int video_nr = -1; 143/* Sequential Number of Radio Device */ 144static int radio_nr = -1; 145/* Sequential Number of VBI Device */ 146static int vbi_nr = -1; 147 148/* Grab parameters for the device driver */ 149 150/* Showing parameters under SYSFS */ 151module_param(isocMode, int, 0444); 152module_param(video_debug, int, 0444); 153module_param(PowerOnAtOpen, int, 0444); 154module_param(video_nr, int, 0444); 155module_param(radio_nr, int, 0444); 156module_param(vbi_nr, int, 0444); 157 158MODULE_PARM_DESC(isocMode, " Set the default format for ISOC endpoint. Default: 0x60 (Compression On)"); 159MODULE_PARM_DESC(video_debug, " Set the default Debug Mode of the device driver. Default: 0 (Off)"); 160MODULE_PARM_DESC(PowerOnAtOpen, " Set the default device to power on when device is opened. Default: 1 (On)"); 161MODULE_PARM_DESC(video_nr, "Set video device number (/dev/videoX). Default: -1 (autodetect)"); 162MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)"); 163MODULE_PARM_DESC(vbi_nr, "Set vbi device number (/dev/vbiX). Default: -1 (autodetect)"); 164 165 166// Misc stuff 167MODULE_AUTHOR(DRIVER_AUTHOR); 168MODULE_DESCRIPTION(DRIVER_DESC); 169MODULE_LICENSE(DRIVER_LICENSE); 170MODULE_VERSION(USBVISION_VERSION_STRING); 171MODULE_ALIAS(DRIVER_ALIAS); 172 173 174/*****************************************************************************/ 175/* SYSFS Code - Copied from the stv680.c usb module. */ 176/* Device information is located at /sys/class/video4linux/video0 */ 177/* Device parameters information is located at /sys/module/usbvision */ 178/* Device USB Information is located at */ 179/* /sys/bus/usb/drivers/USBVision Video Grabber */ 180/*****************************************************************************/ 181 182#define YES_NO(x) ((x) ? "Yes" : "No") 183 184static inline struct usb_usbvision *cd_to_usbvision(struct device *cd) 185{ 186 struct video_device *vdev = 187 container_of(cd, struct video_device, dev); 188 return video_get_drvdata(vdev); 189} 190 191static ssize_t show_version(struct device *cd, 192 struct device_attribute *attr, char *buf) 193{ 194 return sprintf(buf, "%s\n", USBVISION_VERSION_STRING); 195} 196static DEVICE_ATTR(version, S_IRUGO, show_version, NULL); 197 198static ssize_t show_model(struct device *cd, 199 struct device_attribute *attr, char *buf) 200{ 201 struct video_device *vdev = 202 container_of(cd, struct video_device, dev); 203 struct usb_usbvision *usbvision = video_get_drvdata(vdev); 204 return sprintf(buf, "%s\n", 205 usbvision_device_data[usbvision->DevModel].ModelString); 206} 207static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); 208 209static ssize_t show_hue(struct device *cd, 210 struct device_attribute *attr, char *buf) 211{ 212 struct video_device *vdev = 213 container_of(cd, struct video_device, dev); 214 struct usb_usbvision *usbvision = video_get_drvdata(vdev); 215 struct v4l2_control ctrl; 216 ctrl.id = V4L2_CID_HUE; 217 ctrl.value = 0; 218 if(usbvision->user) 219 call_i2c_clients(usbvision, VIDIOC_G_CTRL, &ctrl); 220 return sprintf(buf, "%d\n", ctrl.value); 221} 222static DEVICE_ATTR(hue, S_IRUGO, show_hue, NULL); 223 224static ssize_t show_contrast(struct device *cd, 225 struct device_attribute *attr, char *buf) 226{ 227 struct video_device *vdev = 228 container_of(cd, struct video_device, dev); 229 struct usb_usbvision *usbvision = video_get_drvdata(vdev); 230 struct v4l2_control ctrl; 231 ctrl.id = V4L2_CID_CONTRAST; 232 ctrl.value = 0; 233 if(usbvision->user) 234 call_i2c_clients(usbvision, VIDIOC_G_CTRL, &ctrl); 235 return sprintf(buf, "%d\n", ctrl.value); 236} 237static DEVICE_ATTR(contrast, S_IRUGO, show_contrast, NULL); 238 239static ssize_t show_brightness(struct device *cd, 240 struct device_attribute *attr, char *buf) 241{ 242 struct video_device *vdev = 243 container_of(cd, struct video_device, dev); 244 struct usb_usbvision *usbvision = video_get_drvdata(vdev); 245 struct v4l2_control ctrl; 246 ctrl.id = V4L2_CID_BRIGHTNESS; 247 ctrl.value = 0; 248 if(usbvision->user) 249 call_i2c_clients(usbvision, VIDIOC_G_CTRL, &ctrl); 250 return sprintf(buf, "%d\n", ctrl.value); 251} 252static DEVICE_ATTR(brightness, S_IRUGO, show_brightness, NULL); 253 254static ssize_t show_saturation(struct device *cd, 255 struct device_attribute *attr, char *buf) 256{ 257 struct video_device *vdev = 258 container_of(cd, struct video_device, dev); 259 struct usb_usbvision *usbvision = video_get_drvdata(vdev); 260 struct v4l2_control ctrl; 261 ctrl.id = V4L2_CID_SATURATION; 262 ctrl.value = 0; 263 if(usbvision->user) 264 call_i2c_clients(usbvision, VIDIOC_G_CTRL, &ctrl); 265 return sprintf(buf, "%d\n", ctrl.value); 266} 267static DEVICE_ATTR(saturation, S_IRUGO, show_saturation, NULL); 268 269static ssize_t show_streaming(struct device *cd, 270 struct device_attribute *attr, char *buf) 271{ 272 struct video_device *vdev = 273 container_of(cd, struct video_device, dev); 274 struct usb_usbvision *usbvision = video_get_drvdata(vdev); 275 return sprintf(buf, "%s\n", 276 YES_NO(usbvision->streaming==Stream_On?1:0)); 277} 278static DEVICE_ATTR(streaming, S_IRUGO, show_streaming, NULL); 279 280static ssize_t show_compression(struct device *cd, 281 struct device_attribute *attr, char *buf) 282{ 283 struct video_device *vdev = 284 container_of(cd, struct video_device, dev); 285 struct usb_usbvision *usbvision = video_get_drvdata(vdev); 286 return sprintf(buf, "%s\n", 287 YES_NO(usbvision->isocMode==ISOC_MODE_COMPRESS)); 288} 289static DEVICE_ATTR(compression, S_IRUGO, show_compression, NULL); 290 291static ssize_t show_device_bridge(struct device *cd, 292 struct device_attribute *attr, char *buf) 293{ 294 struct video_device *vdev = 295 container_of(cd, struct video_device, dev); 296 struct usb_usbvision *usbvision = video_get_drvdata(vdev); 297 return sprintf(buf, "%d\n", usbvision->bridgeType); 298} 299static DEVICE_ATTR(bridge, S_IRUGO, show_device_bridge, NULL); 300 301static void usbvision_create_sysfs(struct video_device *vdev) 302{ 303 int res; 304 if (!vdev) 305 return; 306 do { 307 res = device_create_file(&vdev->dev, &dev_attr_version); 308 if (res<0) 309 break; 310 res = device_create_file(&vdev->dev, &dev_attr_model); 311 if (res<0) 312 break; 313 res = device_create_file(&vdev->dev, &dev_attr_hue); 314 if (res<0) 315 break; 316 res = device_create_file(&vdev->dev, &dev_attr_contrast); 317 if (res<0) 318 break; 319 res = device_create_file(&vdev->dev, &dev_attr_brightness); 320 if (res<0) 321 break; 322 res = device_create_file(&vdev->dev, &dev_attr_saturation); 323 if (res<0) 324 break; 325 res = device_create_file(&vdev->dev, &dev_attr_streaming); 326 if (res<0) 327 break; 328 res = device_create_file(&vdev->dev, &dev_attr_compression); 329 if (res<0) 330 break; 331 res = device_create_file(&vdev->dev, &dev_attr_bridge); 332 if (res>=0) 333 return; 334 } while (0); 335 336 err("%s error: %d\n", __func__, res); 337} 338 339static void usbvision_remove_sysfs(struct video_device *vdev) 340{ 341 if (vdev) { 342 device_remove_file(&vdev->dev, &dev_attr_version); 343 device_remove_file(&vdev->dev, &dev_attr_model); 344 device_remove_file(&vdev->dev, &dev_attr_hue); 345 device_remove_file(&vdev->dev, &dev_attr_contrast); 346 device_remove_file(&vdev->dev, &dev_attr_brightness); 347 device_remove_file(&vdev->dev, &dev_attr_saturation); 348 device_remove_file(&vdev->dev, &dev_attr_streaming); 349 device_remove_file(&vdev->dev, &dev_attr_compression); 350 device_remove_file(&vdev->dev, &dev_attr_bridge); 351 } 352} 353 354/* 355 * usbvision_open() 356 * 357 * This is part of Video 4 Linux API. The driver can be opened by one 358 * client only (checks internal counter 'usbvision->user'). The procedure 359 * then allocates buffers needed for video processing. 360 * 361 */ 362static int usbvision_v4l2_open(struct inode *inode, struct file *file) 363{ 364 struct video_device *dev = video_devdata(file); 365 struct usb_usbvision *usbvision = 366 (struct usb_usbvision *) video_get_drvdata(dev); 367 int errCode = 0; 368 369 PDEBUG(DBG_IO, "open"); 370 371 usbvision_reset_powerOffTimer(usbvision); 372 373 if (usbvision->user) 374 errCode = -EBUSY; 375 else { 376 /* Allocate memory for the scratch ring buffer */ 377 errCode = usbvision_scratch_alloc(usbvision); 378 if (isocMode==ISOC_MODE_COMPRESS) { 379 /* Allocate intermediate decompression buffers 380 only if needed */ 381 errCode = usbvision_decompress_alloc(usbvision); 382 } 383 if (errCode) { 384 /* Deallocate all buffers if trouble */ 385 usbvision_scratch_free(usbvision); 386 usbvision_decompress_free(usbvision); 387 } 388 } 389 390 /* If so far no errors then we shall start the camera */ 391 if (!errCode) { 392 mutex_lock(&usbvision->lock); 393 if (usbvision->power == 0) { 394 usbvision_power_on(usbvision); 395 usbvision_i2c_register(usbvision); 396 } 397 398 /* Send init sequence only once, it's large! */ 399 if (!usbvision->initialized) { 400 int setup_ok = 0; 401 setup_ok = usbvision_setup(usbvision,isocMode); 402 if (setup_ok) 403 usbvision->initialized = 1; 404 else 405 errCode = -EBUSY; 406 } 407 408 if (!errCode) { 409 usbvision_begin_streaming(usbvision); 410 errCode = usbvision_init_isoc(usbvision); 411 /* device must be initialized before isoc transfer */ 412 usbvision_muxsel(usbvision,0); 413 usbvision->user++; 414 } else { 415 if (PowerOnAtOpen) { 416 usbvision_i2c_unregister(usbvision); 417 usbvision_power_off(usbvision); 418 usbvision->initialized = 0; 419 } 420 } 421 mutex_unlock(&usbvision->lock); 422 } 423 424 /* prepare queues */ 425 usbvision_empty_framequeues(usbvision); 426 427 PDEBUG(DBG_IO, "success"); 428 return errCode; 429} 430 431/* 432 * usbvision_v4l2_close() 433 * 434 * This is part of Video 4 Linux API. The procedure 435 * stops streaming and deallocates all buffers that were earlier 436 * allocated in usbvision_v4l2_open(). 437 * 438 */ 439static int usbvision_v4l2_close(struct inode *inode, struct file *file) 440{ 441 struct video_device *dev = video_devdata(file); 442 struct usb_usbvision *usbvision = 443 (struct usb_usbvision *) video_get_drvdata(dev); 444 445 PDEBUG(DBG_IO, "close"); 446 mutex_lock(&usbvision->lock); 447 448 usbvision_audio_off(usbvision); 449 usbvision_restart_isoc(usbvision); 450 usbvision_stop_isoc(usbvision); 451 452 usbvision_decompress_free(usbvision); 453 usbvision_frames_free(usbvision); 454 usbvision_empty_framequeues(usbvision); 455 usbvision_scratch_free(usbvision); 456 457 usbvision->user--; 458 459 if (PowerOnAtOpen) { 460 /* power off in a little while 461 to avoid off/on every close/open short sequences */ 462 usbvision_set_powerOffTimer(usbvision); 463 usbvision->initialized = 0; 464 } 465 466 mutex_unlock(&usbvision->lock); 467 468 if (usbvision->remove_pending) { 469 printk(KERN_INFO "%s: Final disconnect\n", __func__); 470 usbvision_release(usbvision); 471 } 472 473 PDEBUG(DBG_IO, "success"); 474 return 0; 475} 476 477 478/* 479 * usbvision_ioctl() 480 * 481 * This is part of Video 4 Linux API. The procedure handles ioctl() calls. 482 * 483 */ 484#ifdef CONFIG_VIDEO_ADV_DEBUG 485static int vidioc_g_register (struct file *file, void *priv, 486 struct v4l2_register *reg) 487{ 488 struct video_device *dev = video_devdata(file); 489 struct usb_usbvision *usbvision = 490 (struct usb_usbvision *) video_get_drvdata(dev); 491 int errCode; 492 493 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip)) 494 return -EINVAL; 495 /* NT100x has a 8-bit register space */ 496 errCode = usbvision_read_reg(usbvision, reg->reg&0xff); 497 if (errCode < 0) { 498 err("%s: VIDIOC_DBG_G_REGISTER failed: error %d", 499 __func__, errCode); 500 return errCode; 501 } 502 reg->val = errCode; 503 return 0; 504} 505 506static int vidioc_s_register (struct file *file, void *priv, 507 struct v4l2_register *reg) 508{ 509 struct video_device *dev = video_devdata(file); 510 struct usb_usbvision *usbvision = 511 (struct usb_usbvision *) video_get_drvdata(dev); 512 int errCode; 513 514 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip)) 515 return -EINVAL; 516 /* NT100x has a 8-bit register space */ 517 errCode = usbvision_write_reg(usbvision, reg->reg&0xff, reg->val); 518 if (errCode < 0) { 519 err("%s: VIDIOC_DBG_S_REGISTER failed: error %d", 520 __func__, errCode); 521 return errCode; 522 } 523 return 0; 524} 525#endif 526 527static int vidioc_querycap (struct file *file, void *priv, 528 struct v4l2_capability *vc) 529{ 530 struct video_device *dev = video_devdata(file); 531 struct usb_usbvision *usbvision = 532 (struct usb_usbvision *) video_get_drvdata(dev); 533 534 strlcpy(vc->driver, "USBVision", sizeof(vc->driver)); 535 strlcpy(vc->card, 536 usbvision_device_data[usbvision->DevModel].ModelString, 537 sizeof(vc->card)); 538 strlcpy(vc->bus_info, usbvision->dev->dev.bus_id, 539 sizeof(vc->bus_info)); 540 vc->version = USBVISION_DRIVER_VERSION; 541 vc->capabilities = V4L2_CAP_VIDEO_CAPTURE | 542 V4L2_CAP_AUDIO | 543 V4L2_CAP_READWRITE | 544 V4L2_CAP_STREAMING | 545 (usbvision->have_tuner ? V4L2_CAP_TUNER : 0); 546 return 0; 547} 548 549static int vidioc_enum_input (struct file *file, void *priv, 550 struct v4l2_input *vi) 551{ 552 struct video_device *dev = video_devdata(file); 553 struct usb_usbvision *usbvision = 554 (struct usb_usbvision *) video_get_drvdata(dev); 555 int chan; 556 557 if ((vi->index >= usbvision->video_inputs) || (vi->index < 0) ) 558 return -EINVAL; 559 if (usbvision->have_tuner) { 560 chan = vi->index; 561 } else { 562 chan = vi->index + 1; /*skip Television string*/ 563 } 564 /* Determine the requested input characteristics 565 specific for each usbvision card model */ 566 switch(chan) { 567 case 0: 568 if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) { 569 strcpy(vi->name, "White Video Input"); 570 } else { 571 strcpy(vi->name, "Television"); 572 vi->type = V4L2_INPUT_TYPE_TUNER; 573 vi->audioset = 1; 574 vi->tuner = chan; 575 vi->std = USBVISION_NORMS; 576 } 577 break; 578 case 1: 579 vi->type = V4L2_INPUT_TYPE_CAMERA; 580 if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) { 581 strcpy(vi->name, "Green Video Input"); 582 } else { 583 strcpy(vi->name, "Composite Video Input"); 584 } 585 vi->std = V4L2_STD_PAL; 586 break; 587 case 2: 588 vi->type = V4L2_INPUT_TYPE_CAMERA; 589 if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) { 590 strcpy(vi->name, "Yellow Video Input"); 591 } else { 592 strcpy(vi->name, "S-Video Input"); 593 } 594 vi->std = V4L2_STD_PAL; 595 break; 596 case 3: 597 vi->type = V4L2_INPUT_TYPE_CAMERA; 598 strcpy(vi->name, "Red Video Input"); 599 vi->std = V4L2_STD_PAL; 600 break; 601 } 602 return 0; 603} 604 605static int vidioc_g_input (struct file *file, void *priv, unsigned int *input) 606{ 607 struct video_device *dev = video_devdata(file); 608 struct usb_usbvision *usbvision = 609 (struct usb_usbvision *) video_get_drvdata(dev); 610 611 *input = usbvision->ctl_input; 612 return 0; 613} 614 615static int vidioc_s_input (struct file *file, void *priv, unsigned int input) 616{ 617 struct video_device *dev = video_devdata(file); 618 struct usb_usbvision *usbvision = 619 (struct usb_usbvision *) video_get_drvdata(dev); 620 621 if ((input >= usbvision->video_inputs) || (input < 0) ) 622 return -EINVAL; 623 624 mutex_lock(&usbvision->lock); 625 usbvision_muxsel(usbvision, input); 626 usbvision_set_input(usbvision); 627 usbvision_set_output(usbvision, 628 usbvision->curwidth, 629 usbvision->curheight); 630 mutex_unlock(&usbvision->lock); 631 return 0; 632} 633 634static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *id) 635{ 636 struct video_device *dev = video_devdata(file); 637 struct usb_usbvision *usbvision = 638 (struct usb_usbvision *) video_get_drvdata(dev); 639 usbvision->tvnormId=*id; 640 641 mutex_lock(&usbvision->lock); 642 call_i2c_clients(usbvision, VIDIOC_S_STD, 643 &usbvision->tvnormId); 644 mutex_unlock(&usbvision->lock); 645 /* propagate the change to the decoder */ 646 usbvision_muxsel(usbvision, usbvision->ctl_input); 647 648 return 0; 649} 650 651static int vidioc_g_tuner (struct file *file, void *priv, 652 struct v4l2_tuner *vt) 653{ 654 struct video_device *dev = video_devdata(file); 655 struct usb_usbvision *usbvision = 656 (struct usb_usbvision *) video_get_drvdata(dev); 657 658 if (!usbvision->have_tuner || vt->index) // Only tuner 0 659 return -EINVAL; 660 if(usbvision->radio) { 661 strcpy(vt->name, "Radio"); 662 vt->type = V4L2_TUNER_RADIO; 663 } else { 664 strcpy(vt->name, "Television"); 665 } 666 /* Let clients fill in the remainder of this struct */ 667 call_i2c_clients(usbvision,VIDIOC_G_TUNER,vt); 668 669 return 0; 670} 671 672static int vidioc_s_tuner (struct file *file, void *priv, 673 struct v4l2_tuner *vt) 674{ 675 struct video_device *dev = video_devdata(file); 676 struct usb_usbvision *usbvision = 677 (struct usb_usbvision *) video_get_drvdata(dev); 678 679 // Only no or one tuner for now 680 if (!usbvision->have_tuner || vt->index) 681 return -EINVAL; 682 /* let clients handle this */ 683 call_i2c_clients(usbvision,VIDIOC_S_TUNER,vt); 684 685 return 0; 686} 687 688static int vidioc_g_frequency (struct file *file, void *priv, 689 struct v4l2_frequency *freq) 690{ 691 struct video_device *dev = video_devdata(file); 692 struct usb_usbvision *usbvision = 693 (struct usb_usbvision *) video_get_drvdata(dev); 694 695 freq->tuner = 0; // Only one tuner 696 if(usbvision->radio) { 697 freq->type = V4L2_TUNER_RADIO; 698 } else { 699 freq->type = V4L2_TUNER_ANALOG_TV; 700 } 701 freq->frequency = usbvision->freq; 702 703 return 0; 704} 705 706static int vidioc_s_frequency (struct file *file, void *priv, 707 struct v4l2_frequency *freq) 708{ 709 struct video_device *dev = video_devdata(file); 710 struct usb_usbvision *usbvision = 711 (struct usb_usbvision *) video_get_drvdata(dev); 712 713 // Only no or one tuner for now 714 if (!usbvision->have_tuner || freq->tuner) 715 return -EINVAL; 716 717 usbvision->freq = freq->frequency; 718 call_i2c_clients(usbvision, VIDIOC_S_FREQUENCY, freq); 719 720 return 0; 721} 722 723static int vidioc_g_audio (struct file *file, void *priv, struct v4l2_audio *a) 724{ 725 struct video_device *dev = video_devdata(file); 726 struct usb_usbvision *usbvision = 727 (struct usb_usbvision *) video_get_drvdata(dev); 728 729 memset(a,0,sizeof(*a)); 730 if(usbvision->radio) { 731 strcpy(a->name,"Radio"); 732 } else { 733 strcpy(a->name, "TV"); 734 } 735 736 return 0; 737} 738 739static int vidioc_s_audio (struct file *file, void *fh, 740 struct v4l2_audio *a) 741{ 742 if(a->index) { 743 return -EINVAL; 744 } 745 746 return 0; 747} 748 749static int vidioc_queryctrl (struct file *file, void *priv, 750 struct v4l2_queryctrl *ctrl) 751{ 752 struct video_device *dev = video_devdata(file); 753 struct usb_usbvision *usbvision = 754 (struct usb_usbvision *) video_get_drvdata(dev); 755 int id=ctrl->id; 756 757 memset(ctrl,0,sizeof(*ctrl)); 758 ctrl->id=id; 759 760 call_i2c_clients(usbvision, VIDIOC_QUERYCTRL, ctrl); 761 762 if (!ctrl->type) 763 return -EINVAL; 764 765 return 0; 766} 767 768static int vidioc_g_ctrl (struct file *file, void *priv, 769 struct v4l2_control *ctrl) 770{ 771 struct video_device *dev = video_devdata(file); 772 struct usb_usbvision *usbvision = 773 (struct usb_usbvision *) video_get_drvdata(dev); 774 call_i2c_clients(usbvision, VIDIOC_G_CTRL, ctrl); 775 776 return 0; 777} 778 779static int vidioc_s_ctrl (struct file *file, void *priv, 780 struct v4l2_control *ctrl) 781{ 782 struct video_device *dev = video_devdata(file); 783 struct usb_usbvision *usbvision = 784 (struct usb_usbvision *) video_get_drvdata(dev); 785 call_i2c_clients(usbvision, VIDIOC_S_CTRL, ctrl); 786 787 return 0; 788} 789 790static int vidioc_reqbufs (struct file *file, 791 void *priv, struct v4l2_requestbuffers *vr) 792{ 793 struct video_device *dev = video_devdata(file); 794 struct usb_usbvision *usbvision = 795 (struct usb_usbvision *) video_get_drvdata(dev); 796 int ret; 797 798 RESTRICT_TO_RANGE(vr->count,1,USBVISION_NUMFRAMES); 799 800 /* Check input validity: 801 the user must do a VIDEO CAPTURE and MMAP method. */ 802 if((vr->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) || 803 (vr->memory != V4L2_MEMORY_MMAP)) 804 return -EINVAL; 805 806 if(usbvision->streaming == Stream_On) { 807 if ((ret = usbvision_stream_interrupt(usbvision))) 808 return ret; 809 } 810 811 usbvision_frames_free(usbvision); 812 usbvision_empty_framequeues(usbvision); 813 vr->count = usbvision_frames_alloc(usbvision,vr->count); 814 815 usbvision->curFrame = NULL; 816 817 return 0; 818} 819 820static int vidioc_querybuf (struct file *file, 821 void *priv, struct v4l2_buffer *vb) 822{ 823 struct video_device *dev = video_devdata(file); 824 struct usb_usbvision *usbvision = 825 (struct usb_usbvision *) video_get_drvdata(dev); 826 struct usbvision_frame *frame; 827 828 /* FIXME : must control 829 that buffers are mapped (VIDIOC_REQBUFS has been called) */ 830 if(vb->type != V4L2_CAP_VIDEO_CAPTURE) { 831 return -EINVAL; 832 } 833 if(vb->index>=usbvision->num_frames) { 834 return -EINVAL; 835 } 836 /* Updating the corresponding frame state */ 837 vb->flags = 0; 838 frame = &usbvision->frame[vb->index]; 839 if(frame->grabstate >= FrameState_Ready) 840 vb->flags |= V4L2_BUF_FLAG_QUEUED; 841 if(frame->grabstate >= FrameState_Done) 842 vb->flags |= V4L2_BUF_FLAG_DONE; 843 if(frame->grabstate == FrameState_Unused) 844 vb->flags |= V4L2_BUF_FLAG_MAPPED; 845 vb->memory = V4L2_MEMORY_MMAP; 846 847 vb->m.offset = vb->index*PAGE_ALIGN(usbvision->max_frame_size); 848 849 vb->memory = V4L2_MEMORY_MMAP; 850 vb->field = V4L2_FIELD_NONE; 851 vb->length = usbvision->curwidth* 852 usbvision->curheight* 853 usbvision->palette.bytes_per_pixel; 854 vb->timestamp = usbvision->frame[vb->index].timestamp; 855 vb->sequence = usbvision->frame[vb->index].sequence; 856 return 0; 857} 858 859static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *vb) 860{ 861 struct video_device *dev = video_devdata(file); 862 struct usb_usbvision *usbvision = 863 (struct usb_usbvision *) video_get_drvdata(dev); 864 struct usbvision_frame *frame; 865 unsigned long lock_flags; 866 867 /* FIXME : works only on VIDEO_CAPTURE MODE, MMAP. */ 868 if(vb->type != V4L2_CAP_VIDEO_CAPTURE) { 869 return -EINVAL; 870 } 871 if(vb->index>=usbvision->num_frames) { 872 return -EINVAL; 873 } 874 875 frame = &usbvision->frame[vb->index]; 876 877 if (frame->grabstate != FrameState_Unused) { 878 return -EAGAIN; 879 } 880 881 /* Mark it as ready and enqueue frame */ 882 frame->grabstate = FrameState_Ready; 883 frame->scanstate = ScanState_Scanning; 884 frame->scanlength = 0; /* Accumulated in usbvision_parse_data() */ 885 886 vb->flags &= ~V4L2_BUF_FLAG_DONE; 887 888 /* set v4l2_format index */ 889 frame->v4l2_format = usbvision->palette; 890 891 spin_lock_irqsave(&usbvision->queue_lock, lock_flags); 892 list_add_tail(&usbvision->frame[vb->index].frame, &usbvision->inqueue); 893 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags); 894 895 return 0; 896} 897 898static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *vb) 899{ 900 struct video_device *dev = video_devdata(file); 901 struct usb_usbvision *usbvision = 902 (struct usb_usbvision *) video_get_drvdata(dev); 903 int ret; 904 struct usbvision_frame *f; 905 unsigned long lock_flags; 906 907 if (vb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 908 return -EINVAL; 909 910 if (list_empty(&(usbvision->outqueue))) { 911 if (usbvision->streaming == Stream_Idle) 912 return -EINVAL; 913 ret = wait_event_interruptible 914 (usbvision->wait_frame, 915 !list_empty(&(usbvision->outqueue))); 916 if (ret) 917 return ret; 918 } 919 920 spin_lock_irqsave(&usbvision->queue_lock, lock_flags); 921 f = list_entry(usbvision->outqueue.next, 922 struct usbvision_frame, frame); 923 list_del(usbvision->outqueue.next); 924 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags); 925 926 f->grabstate = FrameState_Unused; 927 928 vb->memory = V4L2_MEMORY_MMAP; 929 vb->flags = V4L2_BUF_FLAG_MAPPED | 930 V4L2_BUF_FLAG_QUEUED | 931 V4L2_BUF_FLAG_DONE; 932 vb->index = f->index; 933 vb->sequence = f->sequence; 934 vb->timestamp = f->timestamp; 935 vb->field = V4L2_FIELD_NONE; 936 vb->bytesused = f->scanlength; 937 938 return 0; 939} 940 941static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i) 942{ 943 struct video_device *dev = video_devdata(file); 944 struct usb_usbvision *usbvision = 945 (struct usb_usbvision *) video_get_drvdata(dev); 946 int b=V4L2_BUF_TYPE_VIDEO_CAPTURE; 947 948 usbvision->streaming = Stream_On; 949 call_i2c_clients(usbvision,VIDIOC_STREAMON , &b); 950 951 return 0; 952} 953 954static int vidioc_streamoff(struct file *file, 955 void *priv, enum v4l2_buf_type type) 956{ 957 struct video_device *dev = video_devdata(file); 958 struct usb_usbvision *usbvision = 959 (struct usb_usbvision *) video_get_drvdata(dev); 960 int b=V4L2_BUF_TYPE_VIDEO_CAPTURE; 961 962 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 963 return -EINVAL; 964 965 if(usbvision->streaming == Stream_On) { 966 usbvision_stream_interrupt(usbvision); 967 /* Stop all video streamings */ 968 call_i2c_clients(usbvision,VIDIOC_STREAMOFF , &b); 969 } 970 usbvision_empty_framequeues(usbvision); 971 972 return 0; 973} 974 975static int vidioc_enum_fmt_vid_cap (struct file *file, void *priv, 976 struct v4l2_fmtdesc *vfd) 977{ 978 if(vfd->index>=USBVISION_SUPPORTED_PALETTES-1) { 979 return -EINVAL; 980 } 981 vfd->flags = 0; 982 vfd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 983 strcpy(vfd->description,usbvision_v4l2_format[vfd->index].desc); 984 vfd->pixelformat = usbvision_v4l2_format[vfd->index].format; 985 memset(vfd->reserved, 0, sizeof(vfd->reserved)); 986 return 0; 987} 988 989static int vidioc_g_fmt_vid_cap (struct file *file, void *priv, 990 struct v4l2_format *vf) 991{ 992 struct video_device *dev = video_devdata(file); 993 struct usb_usbvision *usbvision = 994 (struct usb_usbvision *) video_get_drvdata(dev); 995 vf->fmt.pix.width = usbvision->curwidth; 996 vf->fmt.pix.height = usbvision->curheight; 997 vf->fmt.pix.pixelformat = usbvision->palette.format; 998 vf->fmt.pix.bytesperline = 999 usbvision->curwidth*usbvision->palette.bytes_per_pixel; 1000 vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*usbvision->curheight; 1001 vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1002 vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */ 1003 1004 return 0; 1005} 1006 1007static int vidioc_try_fmt_vid_cap (struct file *file, void *priv, 1008 struct v4l2_format *vf) 1009{ 1010 struct video_device *dev = video_devdata(file); 1011 struct usb_usbvision *usbvision = 1012 (struct usb_usbvision *) video_get_drvdata(dev); 1013 int formatIdx; 1014 1015 /* Find requested format in available ones */ 1016 for(formatIdx=0;formatIdx<USBVISION_SUPPORTED_PALETTES;formatIdx++) { 1017 if(vf->fmt.pix.pixelformat == 1018 usbvision_v4l2_format[formatIdx].format) { 1019 usbvision->palette = usbvision_v4l2_format[formatIdx]; 1020 break; 1021 } 1022 } 1023 /* robustness */ 1024 if(formatIdx == USBVISION_SUPPORTED_PALETTES) { 1025 return -EINVAL; 1026 } 1027 RESTRICT_TO_RANGE(vf->fmt.pix.width, MIN_FRAME_WIDTH, MAX_FRAME_WIDTH); 1028 RESTRICT_TO_RANGE(vf->fmt.pix.height, MIN_FRAME_HEIGHT, MAX_FRAME_HEIGHT); 1029 1030 vf->fmt.pix.bytesperline = vf->fmt.pix.width* 1031 usbvision->palette.bytes_per_pixel; 1032 vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*vf->fmt.pix.height; 1033 1034 return 0; 1035} 1036 1037static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1038 struct v4l2_format *vf) 1039{ 1040 struct video_device *dev = video_devdata(file); 1041 struct usb_usbvision *usbvision = 1042 (struct usb_usbvision *) video_get_drvdata(dev); 1043 int ret; 1044 1045 if( 0 != (ret=vidioc_try_fmt_vid_cap (file, priv, vf)) ) { 1046 return ret; 1047 } 1048 1049 /* stop io in case it is already in progress */ 1050 if(usbvision->streaming == Stream_On) { 1051 if ((ret = usbvision_stream_interrupt(usbvision))) 1052 return ret; 1053 } 1054 usbvision_frames_free(usbvision); 1055 usbvision_empty_framequeues(usbvision); 1056 1057 usbvision->curFrame = NULL; 1058 1059 /* by now we are committed to the new data... */ 1060 mutex_lock(&usbvision->lock); 1061 usbvision_set_output(usbvision, vf->fmt.pix.width, vf->fmt.pix.height); 1062 mutex_unlock(&usbvision->lock); 1063 1064 return 0; 1065} 1066 1067static ssize_t usbvision_v4l2_read(struct file *file, char __user *buf, 1068 size_t count, loff_t *ppos) 1069{ 1070 struct video_device *dev = video_devdata(file); 1071 struct usb_usbvision *usbvision = 1072 (struct usb_usbvision *) video_get_drvdata(dev); 1073 int noblock = file->f_flags & O_NONBLOCK; 1074 unsigned long lock_flags; 1075 1076 int ret,i; 1077 struct usbvision_frame *frame; 1078 1079 PDEBUG(DBG_IO, "%s: %ld bytes, noblock=%d", __func__, 1080 (unsigned long)count, noblock); 1081 1082 if (!USBVISION_IS_OPERATIONAL(usbvision) || (buf == NULL)) 1083 return -EFAULT; 1084 1085 /* This entry point is compatible with the mmap routines 1086 so that a user can do either VIDIOC_QBUF/VIDIOC_DQBUF 1087 to get frames or call read on the device. */ 1088 if(!usbvision->num_frames) { 1089 /* First, allocate some frames to work with 1090 if this has not been done with VIDIOC_REQBUF */ 1091 usbvision_frames_free(usbvision); 1092 usbvision_empty_framequeues(usbvision); 1093 usbvision_frames_alloc(usbvision,USBVISION_NUMFRAMES); 1094 } 1095 1096 if(usbvision->streaming != Stream_On) { 1097 /* no stream is running, make it running ! */ 1098 usbvision->streaming = Stream_On; 1099 call_i2c_clients(usbvision,VIDIOC_STREAMON , NULL); 1100 } 1101 1102 /* Then, enqueue as many frames as possible 1103 (like a user of VIDIOC_QBUF would do) */ 1104 for(i=0;i<usbvision->num_frames;i++) { 1105 frame = &usbvision->frame[i]; 1106 if(frame->grabstate == FrameState_Unused) { 1107 /* Mark it as ready and enqueue frame */ 1108 frame->grabstate = FrameState_Ready; 1109 frame->scanstate = ScanState_Scanning; 1110 /* Accumulated in usbvision_parse_data() */ 1111 frame->scanlength = 0; 1112 1113 /* set v4l2_format index */ 1114 frame->v4l2_format = usbvision->palette; 1115 1116 spin_lock_irqsave(&usbvision->queue_lock, lock_flags); 1117 list_add_tail(&frame->frame, &usbvision->inqueue); 1118 spin_unlock_irqrestore(&usbvision->queue_lock, 1119 lock_flags); 1120 } 1121 } 1122 1123 /* Then try to steal a frame (like a VIDIOC_DQBUF would do) */ 1124 if (list_empty(&(usbvision->outqueue))) { 1125 if(noblock) 1126 return -EAGAIN; 1127 1128 ret = wait_event_interruptible 1129 (usbvision->wait_frame, 1130 !list_empty(&(usbvision->outqueue))); 1131 if (ret) 1132 return ret; 1133 } 1134 1135 spin_lock_irqsave(&usbvision->queue_lock, lock_flags); 1136 frame = list_entry(usbvision->outqueue.next, 1137 struct usbvision_frame, frame); 1138 list_del(usbvision->outqueue.next); 1139 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags); 1140 1141 /* An error returns an empty frame */ 1142 if (frame->grabstate == FrameState_Error) { 1143 frame->bytes_read = 0; 1144 return 0; 1145 } 1146 1147 PDEBUG(DBG_IO, "%s: frmx=%d, bytes_read=%ld, scanlength=%ld", 1148 __func__, 1149 frame->index, frame->bytes_read, frame->scanlength); 1150 1151 /* copy bytes to user space; we allow for partials reads */ 1152 if ((count + frame->bytes_read) > (unsigned long)frame->scanlength) 1153 count = frame->scanlength - frame->bytes_read; 1154 1155 if (copy_to_user(buf, frame->data + frame->bytes_read, count)) { 1156 return -EFAULT; 1157 } 1158 1159 frame->bytes_read += count; 1160 PDEBUG(DBG_IO, "%s: {copy} count used=%ld, new bytes_read=%ld", 1161 __func__, 1162 (unsigned long)count, frame->bytes_read); 1163 1164 /* For now, forget the frame if it has not been read in one shot. */ 1165/* if (frame->bytes_read >= frame->scanlength) {// All data has been read */ 1166 frame->bytes_read = 0; 1167 1168 /* Mark it as available to be used again. */ 1169 frame->grabstate = FrameState_Unused; 1170/* } */ 1171 1172 return count; 1173} 1174 1175static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma) 1176{ 1177 unsigned long size = vma->vm_end - vma->vm_start, 1178 start = vma->vm_start; 1179 void *pos; 1180 u32 i; 1181 1182 struct video_device *dev = video_devdata(file); 1183 struct usb_usbvision *usbvision = 1184 (struct usb_usbvision *) video_get_drvdata(dev); 1185 1186 PDEBUG(DBG_MMAP, "mmap"); 1187 1188 mutex_lock(&usbvision->lock); 1189 1190 if (!USBVISION_IS_OPERATIONAL(usbvision)) { 1191 mutex_unlock(&usbvision->lock); 1192 return -EFAULT; 1193 } 1194 1195 if (!(vma->vm_flags & VM_WRITE) || 1196 size != PAGE_ALIGN(usbvision->max_frame_size)) { 1197 mutex_unlock(&usbvision->lock); 1198 return -EINVAL; 1199 } 1200 1201 for (i = 0; i < usbvision->num_frames; i++) { 1202 if (((PAGE_ALIGN(usbvision->max_frame_size)*i) >> PAGE_SHIFT) == 1203 vma->vm_pgoff) 1204 break; 1205 } 1206 if (i == usbvision->num_frames) { 1207 PDEBUG(DBG_MMAP, 1208 "mmap: user supplied mapping address is out of range"); 1209 mutex_unlock(&usbvision->lock); 1210 return -EINVAL; 1211 } 1212 1213 /* VM_IO is eventually going to replace PageReserved altogether */ 1214 vma->vm_flags |= VM_IO; 1215 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ 1216 1217 pos = usbvision->frame[i].data; 1218 while (size > 0) { 1219 1220 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) { 1221 PDEBUG(DBG_MMAP, "mmap: vm_insert_page failed"); 1222 mutex_unlock(&usbvision->lock); 1223 return -EAGAIN; 1224 } 1225 start += PAGE_SIZE; 1226 pos += PAGE_SIZE; 1227 size -= PAGE_SIZE; 1228 } 1229 1230 mutex_unlock(&usbvision->lock); 1231 return 0; 1232} 1233 1234 1235/* 1236 * Here comes the stuff for radio on usbvision based devices 1237 * 1238 */ 1239static int usbvision_radio_open(struct inode *inode, struct file *file) 1240{ 1241 struct video_device *dev = video_devdata(file); 1242 struct usb_usbvision *usbvision = 1243 (struct usb_usbvision *) video_get_drvdata(dev); 1244 int errCode = 0; 1245 1246 PDEBUG(DBG_IO, "%s:", __func__); 1247 1248 mutex_lock(&usbvision->lock); 1249 1250 if (usbvision->user) { 1251 err("%s: Someone tried to open an already opened USBVision Radio!", __func__); 1252 errCode = -EBUSY; 1253 } 1254 else { 1255 if(PowerOnAtOpen) { 1256 usbvision_reset_powerOffTimer(usbvision); 1257 if (usbvision->power == 0) { 1258 usbvision_power_on(usbvision); 1259 usbvision_i2c_register(usbvision); 1260 } 1261 } 1262 1263 /* Alternate interface 1 is is the biggest frame size */ 1264 errCode = usbvision_set_alternate(usbvision); 1265 if (errCode < 0) { 1266 usbvision->last_error = errCode; 1267 errCode = -EBUSY; 1268 goto out; 1269 } 1270 1271 // If so far no errors then we shall start the radio 1272 usbvision->radio = 1; 1273 call_i2c_clients(usbvision,AUDC_SET_RADIO,&usbvision->tuner_type); 1274 usbvision_set_audio(usbvision, USBVISION_AUDIO_RADIO); 1275 usbvision->user++; 1276 } 1277 1278 if (errCode) { 1279 if (PowerOnAtOpen) { 1280 usbvision_i2c_unregister(usbvision); 1281 usbvision_power_off(usbvision); 1282 usbvision->initialized = 0; 1283 } 1284 } 1285out: 1286 mutex_unlock(&usbvision->lock); 1287 return errCode; 1288} 1289 1290 1291static int usbvision_radio_close(struct inode *inode, struct file *file) 1292{ 1293 struct video_device *dev = video_devdata(file); 1294 struct usb_usbvision *usbvision = 1295 (struct usb_usbvision *) video_get_drvdata(dev); 1296 int errCode = 0; 1297 1298 PDEBUG(DBG_IO, ""); 1299 1300 mutex_lock(&usbvision->lock); 1301 1302 /* Set packet size to 0 */ 1303 usbvision->ifaceAlt=0; 1304 errCode = usb_set_interface(usbvision->dev, usbvision->iface, 1305 usbvision->ifaceAlt); 1306 1307 usbvision_audio_off(usbvision); 1308 usbvision->radio=0; 1309 usbvision->user--; 1310 1311 if (PowerOnAtOpen) { 1312 usbvision_set_powerOffTimer(usbvision); 1313 usbvision->initialized = 0; 1314 } 1315 1316 mutex_unlock(&usbvision->lock); 1317 1318 if (usbvision->remove_pending) { 1319 printk(KERN_INFO "%s: Final disconnect\n", __func__); 1320 usbvision_release(usbvision); 1321 } 1322 1323 PDEBUG(DBG_IO, "success"); 1324 return errCode; 1325} 1326 1327/* 1328 * Here comes the stuff for vbi on usbvision based devices 1329 * 1330 */ 1331static int usbvision_vbi_open(struct inode *inode, struct file *file) 1332{ 1333 /* TODO */ 1334 return -ENODEV; 1335} 1336 1337static int usbvision_vbi_close(struct inode *inode, struct file *file) 1338{ 1339 /* TODO */ 1340 return -ENODEV; 1341} 1342 1343static int usbvision_do_vbi_ioctl(struct inode *inode, struct file *file, 1344 unsigned int cmd, void *arg) 1345{ 1346 /* TODO */ 1347 return -ENOIOCTLCMD; 1348} 1349 1350static int usbvision_vbi_ioctl(struct inode *inode, struct file *file, 1351 unsigned int cmd, unsigned long arg) 1352{ 1353 return video_usercopy(inode, file, cmd, arg, usbvision_do_vbi_ioctl); 1354} 1355 1356 1357// 1358// Video registration stuff 1359// 1360 1361// Video template 1362static const struct file_operations usbvision_fops = { 1363 .owner = THIS_MODULE, 1364 .open = usbvision_v4l2_open, 1365 .release = usbvision_v4l2_close, 1366 .read = usbvision_v4l2_read, 1367 .mmap = usbvision_v4l2_mmap, 1368 .ioctl = video_ioctl2, 1369 .llseek = no_llseek, 1370/* .poll = video_poll, */ 1371 .compat_ioctl = v4l_compat_ioctl32, 1372}; 1373 1374static const struct v4l2_ioctl_ops usbvision_ioctl_ops = { 1375 .vidioc_querycap = vidioc_querycap, 1376 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 1377 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 1378 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 1379 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 1380 .vidioc_reqbufs = vidioc_reqbufs, 1381 .vidioc_querybuf = vidioc_querybuf, 1382 .vidioc_qbuf = vidioc_qbuf, 1383 .vidioc_dqbuf = vidioc_dqbuf, 1384 .vidioc_s_std = vidioc_s_std, 1385 .vidioc_enum_input = vidioc_enum_input, 1386 .vidioc_g_input = vidioc_g_input, 1387 .vidioc_s_input = vidioc_s_input, 1388 .vidioc_queryctrl = vidioc_queryctrl, 1389 .vidioc_g_audio = vidioc_g_audio, 1390 .vidioc_s_audio = vidioc_s_audio, 1391 .vidioc_g_ctrl = vidioc_g_ctrl, 1392 .vidioc_s_ctrl = vidioc_s_ctrl, 1393 .vidioc_streamon = vidioc_streamon, 1394 .vidioc_streamoff = vidioc_streamoff, 1395#ifdef CONFIG_VIDEO_V4L1_COMPAT 1396/* .vidiocgmbuf = vidiocgmbuf, */ 1397#endif 1398 .vidioc_g_tuner = vidioc_g_tuner, 1399 .vidioc_s_tuner = vidioc_s_tuner, 1400 .vidioc_g_frequency = vidioc_g_frequency, 1401 .vidioc_s_frequency = vidioc_s_frequency, 1402#ifdef CONFIG_VIDEO_ADV_DEBUG 1403 .vidioc_g_register = vidioc_g_register, 1404 .vidioc_s_register = vidioc_s_register, 1405#endif 1406}; 1407 1408static struct video_device usbvision_video_template = { 1409 .type = VID_TYPE_TUNER | VID_TYPE_CAPTURE, 1410 .fops = &usbvision_fops, 1411 .ioctl_ops = &usbvision_ioctl_ops, 1412 .name = "usbvision-video", 1413 .release = video_device_release, 1414 .minor = -1, 1415 .tvnorms = USBVISION_NORMS, 1416 .current_norm = V4L2_STD_PAL 1417}; 1418 1419 1420// Radio template 1421static const struct file_operations usbvision_radio_fops = { 1422 .owner = THIS_MODULE, 1423 .open = usbvision_radio_open, 1424 .release = usbvision_radio_close, 1425 .ioctl = video_ioctl2, 1426 .llseek = no_llseek, 1427 .compat_ioctl = v4l_compat_ioctl32, 1428}; 1429 1430static const struct v4l2_ioctl_ops usbvision_radio_ioctl_ops = { 1431 .vidioc_querycap = vidioc_querycap, 1432 .vidioc_enum_input = vidioc_enum_input, 1433 .vidioc_g_input = vidioc_g_input, 1434 .vidioc_s_input = vidioc_s_input, 1435 .vidioc_queryctrl = vidioc_queryctrl, 1436 .vidioc_g_audio = vidioc_g_audio, 1437 .vidioc_s_audio = vidioc_s_audio, 1438 .vidioc_g_ctrl = vidioc_g_ctrl, 1439 .vidioc_s_ctrl = vidioc_s_ctrl, 1440 .vidioc_g_tuner = vidioc_g_tuner, 1441 .vidioc_s_tuner = vidioc_s_tuner, 1442 .vidioc_g_frequency = vidioc_g_frequency, 1443 .vidioc_s_frequency = vidioc_s_frequency, 1444}; 1445 1446static struct video_device usbvision_radio_template = { 1447 .type = VID_TYPE_TUNER, 1448 .fops = &usbvision_radio_fops, 1449 .name = "usbvision-radio", 1450 .release = video_device_release, 1451 .minor = -1, 1452 .ioctl_ops = &usbvision_radio_ioctl_ops, 1453 1454 .tvnorms = USBVISION_NORMS, 1455 .current_norm = V4L2_STD_PAL 1456}; 1457 1458// vbi template 1459static const struct file_operations usbvision_vbi_fops = { 1460 .owner = THIS_MODULE, 1461 .open = usbvision_vbi_open, 1462 .release = usbvision_vbi_close, 1463 .ioctl = usbvision_vbi_ioctl, 1464 .llseek = no_llseek, 1465 .compat_ioctl = v4l_compat_ioctl32, 1466}; 1467 1468static struct video_device usbvision_vbi_template= 1469{ 1470 .type = VID_TYPE_TUNER, 1471 .fops = &usbvision_vbi_fops, 1472 .release = video_device_release, 1473 .name = "usbvision-vbi", 1474 .minor = -1, 1475}; 1476 1477 1478static struct video_device *usbvision_vdev_init(struct usb_usbvision *usbvision, 1479 struct video_device *vdev_template, 1480 char *name) 1481{ 1482 struct usb_device *usb_dev = usbvision->dev; 1483 struct video_device *vdev; 1484 1485 if (usb_dev == NULL) { 1486 err("%s: usbvision->dev is not set", __func__); 1487 return NULL; 1488 } 1489 1490 vdev = video_device_alloc(); 1491 if (NULL == vdev) { 1492 return NULL; 1493 } 1494 *vdev = *vdev_template; 1495// vdev->minor = -1; 1496 vdev->parent = &usb_dev->dev; 1497 snprintf(vdev->name, sizeof(vdev->name), "%s", name); 1498 video_set_drvdata(vdev, usbvision); 1499 return vdev; 1500} 1501 1502// unregister video4linux devices 1503static void usbvision_unregister_video(struct usb_usbvision *usbvision) 1504{ 1505 // vbi Device: 1506 if (usbvision->vbi) { 1507 PDEBUG(DBG_PROBE, "unregister /dev/vbi%d [v4l2]", 1508 usbvision->vbi->minor & 0x1f); 1509 if (usbvision->vbi->minor != -1) { 1510 video_unregister_device(usbvision->vbi); 1511 } else { 1512 video_device_release(usbvision->vbi); 1513 } 1514 usbvision->vbi = NULL; 1515 } 1516 1517 // Radio Device: 1518 if (usbvision->rdev) { 1519 PDEBUG(DBG_PROBE, "unregister /dev/radio%d [v4l2]", 1520 usbvision->rdev->minor & 0x1f); 1521 if (usbvision->rdev->minor != -1) { 1522 video_unregister_device(usbvision->rdev); 1523 } else { 1524 video_device_release(usbvision->rdev); 1525 } 1526 usbvision->rdev = NULL; 1527 } 1528 1529 // Video Device: 1530 if (usbvision->vdev) { 1531 PDEBUG(DBG_PROBE, "unregister /dev/video%d [v4l2]", 1532 usbvision->vdev->minor & 0x1f); 1533 if (usbvision->vdev->minor != -1) { 1534 video_unregister_device(usbvision->vdev); 1535 } else { 1536 video_device_release(usbvision->vdev); 1537 } 1538 usbvision->vdev = NULL; 1539 } 1540} 1541 1542// register video4linux devices 1543static int __devinit usbvision_register_video(struct usb_usbvision *usbvision) 1544{ 1545 // Video Device: 1546 usbvision->vdev = usbvision_vdev_init(usbvision, 1547 &usbvision_video_template, 1548 "USBVision Video"); 1549 if (usbvision->vdev == NULL) { 1550 goto err_exit; 1551 } 1552 if (video_register_device(usbvision->vdev, 1553 VFL_TYPE_GRABBER, 1554 video_nr)<0) { 1555 goto err_exit; 1556 } 1557 printk(KERN_INFO "USBVision[%d]: registered USBVision Video device /dev/video%d [v4l2]\n", 1558 usbvision->nr,usbvision->vdev->minor & 0x1f); 1559 1560 // Radio Device: 1561 if (usbvision_device_data[usbvision->DevModel].Radio) { 1562 // usbvision has radio 1563 usbvision->rdev = usbvision_vdev_init(usbvision, 1564 &usbvision_radio_template, 1565 "USBVision Radio"); 1566 if (usbvision->rdev == NULL) { 1567 goto err_exit; 1568 } 1569 if (video_register_device(usbvision->rdev, 1570 VFL_TYPE_RADIO, 1571 radio_nr)<0) { 1572 goto err_exit; 1573 } 1574 printk(KERN_INFO "USBVision[%d]: registered USBVision Radio device /dev/radio%d [v4l2]\n", 1575 usbvision->nr, usbvision->rdev->minor & 0x1f); 1576 } 1577 // vbi Device: 1578 if (usbvision_device_data[usbvision->DevModel].vbi) { 1579 usbvision->vbi = usbvision_vdev_init(usbvision, 1580 &usbvision_vbi_template, 1581 "USBVision VBI"); 1582 if (usbvision->vdev == NULL) { 1583 goto err_exit; 1584 } 1585 if (video_register_device(usbvision->vbi, 1586 VFL_TYPE_VBI, 1587 vbi_nr)<0) { 1588 goto err_exit; 1589 } 1590 printk(KERN_INFO "USBVision[%d]: registered USBVision VBI device /dev/vbi%d [v4l2] (Not Working Yet!)\n", 1591 usbvision->nr,usbvision->vbi->minor & 0x1f); 1592 } 1593 // all done 1594 return 0; 1595 1596 err_exit: 1597 err("USBVision[%d]: video_register_device() failed", usbvision->nr); 1598 usbvision_unregister_video(usbvision); 1599 return -1; 1600} 1601 1602/* 1603 * usbvision_alloc() 1604 * 1605 * This code allocates the struct usb_usbvision. 1606 * It is filled with default values. 1607 * 1608 * Returns NULL on error, a pointer to usb_usbvision else. 1609 * 1610 */ 1611static struct usb_usbvision *usbvision_alloc(struct usb_device *dev) 1612{ 1613 struct usb_usbvision *usbvision; 1614 1615 if ((usbvision = kzalloc(sizeof(struct usb_usbvision), GFP_KERNEL)) == 1616 NULL) { 1617 goto err_exit; 1618 } 1619 1620 usbvision->dev = dev; 1621 1622 mutex_init(&usbvision->lock); /* available */ 1623 1624 // prepare control urb for control messages during interrupts 1625 usbvision->ctrlUrb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL); 1626 if (usbvision->ctrlUrb == NULL) { 1627 goto err_exit; 1628 } 1629 init_waitqueue_head(&usbvision->ctrlUrb_wq); 1630 1631 usbvision_init_powerOffTimer(usbvision); 1632 1633 return usbvision; 1634 1635err_exit: 1636 if (usbvision && usbvision->ctrlUrb) { 1637 usb_free_urb(usbvision->ctrlUrb); 1638 } 1639 if (usbvision) { 1640 kfree(usbvision); 1641 } 1642 return NULL; 1643} 1644 1645/* 1646 * usbvision_release() 1647 * 1648 * This code does final release of struct usb_usbvision. This happens 1649 * after the device is disconnected -and- all clients closed their files. 1650 * 1651 */ 1652static void usbvision_release(struct usb_usbvision *usbvision) 1653{ 1654 PDEBUG(DBG_PROBE, ""); 1655 1656 mutex_lock(&usbvision->lock); 1657 1658 usbvision_reset_powerOffTimer(usbvision); 1659 1660 usbvision->initialized = 0; 1661 1662 mutex_unlock(&usbvision->lock); 1663 1664 usbvision_remove_sysfs(usbvision->vdev); 1665 usbvision_unregister_video(usbvision); 1666 1667 if (usbvision->ctrlUrb) { 1668 usb_free_urb(usbvision->ctrlUrb); 1669 } 1670 1671 kfree(usbvision); 1672 1673 PDEBUG(DBG_PROBE, "success"); 1674} 1675 1676 1677/*********************** usb interface **********************************/ 1678 1679static void usbvision_configure_video(struct usb_usbvision *usbvision) 1680{ 1681 int model; 1682 1683 if (usbvision == NULL) 1684 return; 1685 1686 model = usbvision->DevModel; 1687 usbvision->palette = usbvision_v4l2_format[2]; // V4L2_PIX_FMT_RGB24; 1688 1689 if (usbvision_device_data[usbvision->DevModel].Vin_Reg2_override) { 1690 usbvision->Vin_Reg2_Preset = 1691 usbvision_device_data[usbvision->DevModel].Vin_Reg2; 1692 } else { 1693 usbvision->Vin_Reg2_Preset = 0; 1694 } 1695 1696 usbvision->tvnormId = usbvision_device_data[model].VideoNorm; 1697 1698 usbvision->video_inputs = usbvision_device_data[model].VideoChannels; 1699 usbvision->ctl_input = 0; 1700 1701 /* This should be here to make i2c clients to be able to register */ 1702 /* first switch off audio */ 1703 usbvision_audio_off(usbvision); 1704 if (!PowerOnAtOpen) { 1705 /* and then power up the noisy tuner */ 1706 usbvision_power_on(usbvision); 1707 usbvision_i2c_register(usbvision); 1708 } 1709} 1710 1711/* 1712 * usbvision_probe() 1713 * 1714 * This procedure queries device descriptor and accepts the interface 1715 * if it looks like USBVISION video device 1716 * 1717 */ 1718static int __devinit usbvision_probe(struct usb_interface *intf, 1719 const struct usb_device_id *devid) 1720{ 1721 struct usb_device *dev = usb_get_dev(interface_to_usbdev(intf)); 1722 struct usb_interface *uif; 1723 __u8 ifnum = intf->altsetting->desc.bInterfaceNumber; 1724 const struct usb_host_interface *interface; 1725 struct usb_usbvision *usbvision = NULL; 1726 const struct usb_endpoint_descriptor *endpoint; 1727 int model,i; 1728 1729 PDEBUG(DBG_PROBE, "VID=%#04x, PID=%#04x, ifnum=%u", 1730 dev->descriptor.idVendor, 1731 dev->descriptor.idProduct, ifnum); 1732 1733 model = devid->driver_info; 1734 if ( (model<0) || (model>=usbvision_device_data_size) ) { 1735 PDEBUG(DBG_PROBE, "model out of bounds %d",model); 1736 return -ENODEV; 1737 } 1738 printk(KERN_INFO "%s: %s found\n", __func__, 1739 usbvision_device_data[model].ModelString); 1740 1741 if (usbvision_device_data[model].Interface >= 0) { 1742 interface = &dev->actconfig->interface[usbvision_device_data[model].Interface]->altsetting[0]; 1743 } else { 1744 interface = &dev->actconfig->interface[ifnum]->altsetting[0]; 1745 } 1746 endpoint = &interface->endpoint[1].desc; 1747 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 1748 USB_ENDPOINT_XFER_ISOC) { 1749 err("%s: interface %d. has non-ISO endpoint!", 1750 __func__, ifnum); 1751 err("%s: Endpoint attributes %d", 1752 __func__, endpoint->bmAttributes); 1753 return -ENODEV; 1754 } 1755 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == 1756 USB_DIR_OUT) { 1757 err("%s: interface %d. has ISO OUT endpoint!", 1758 __func__, ifnum); 1759 return -ENODEV; 1760 } 1761 1762 if ((usbvision = usbvision_alloc(dev)) == NULL) { 1763 err("%s: couldn't allocate USBVision struct", __func__); 1764 return -ENOMEM; 1765 } 1766 1767 if (dev->descriptor.bNumConfigurations > 1) { 1768 usbvision->bridgeType = BRIDGE_NT1004; 1769 } else if (model == DAZZLE_DVC_90_REV_1_SECAM) { 1770 usbvision->bridgeType = BRIDGE_NT1005; 1771 } else { 1772 usbvision->bridgeType = BRIDGE_NT1003; 1773 } 1774 PDEBUG(DBG_PROBE, "bridgeType %d", usbvision->bridgeType); 1775 1776 mutex_lock(&usbvision->lock); 1777 1778 /* compute alternate max packet sizes */ 1779 uif = dev->actconfig->interface[0]; 1780 1781 usbvision->num_alt=uif->num_altsetting; 1782 PDEBUG(DBG_PROBE, "Alternate settings: %i",usbvision->num_alt); 1783 usbvision->alt_max_pkt_size = kmalloc(32* 1784 usbvision->num_alt,GFP_KERNEL); 1785 if (usbvision->alt_max_pkt_size == NULL) { 1786 err("usbvision: out of memory!\n"); 1787 mutex_unlock(&usbvision->lock); 1788 return -ENOMEM; 1789 } 1790 1791 for (i = 0; i < usbvision->num_alt ; i++) { 1792 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc. 1793 wMaxPacketSize); 1794 usbvision->alt_max_pkt_size[i] = 1795 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); 1796 PDEBUG(DBG_PROBE, "Alternate setting %i, max size= %i",i, 1797 usbvision->alt_max_pkt_size[i]); 1798 } 1799 1800 1801 usbvision->nr = usbvision_nr++; 1802 1803 usbvision->have_tuner = usbvision_device_data[model].Tuner; 1804 if (usbvision->have_tuner) { 1805 usbvision->tuner_type = usbvision_device_data[model].TunerType; 1806 } 1807 1808 usbvision->tuner_addr = ADDR_UNSET; 1809 1810 usbvision->DevModel = model; 1811 usbvision->remove_pending = 0; 1812 usbvision->iface = ifnum; 1813 usbvision->ifaceAlt = 0; 1814 usbvision->video_endp = endpoint->bEndpointAddress; 1815 usbvision->isocPacketSize = 0; 1816 usbvision->usb_bandwidth = 0; 1817 usbvision->user = 0; 1818 usbvision->streaming = Stream_Off; 1819 usbvision_register_video(usbvision); 1820 usbvision_configure_video(usbvision); 1821 mutex_unlock(&usbvision->lock); 1822 1823 1824 usb_set_intfdata (intf, usbvision); 1825 usbvision_create_sysfs(usbvision->vdev); 1826 1827 PDEBUG(DBG_PROBE, "success"); 1828 return 0; 1829} 1830 1831 1832/* 1833 * usbvision_disconnect() 1834 * 1835 * This procedure stops all driver activity, deallocates interface-private 1836 * structure (pointed by 'ptr') and after that driver should be removable 1837 * with no ill consequences. 1838 * 1839 */ 1840static void __devexit usbvision_disconnect(struct usb_interface *intf) 1841{ 1842 struct usb_usbvision *usbvision = usb_get_intfdata(intf); 1843 1844 PDEBUG(DBG_PROBE, ""); 1845 1846 if (usbvision == NULL) { 1847 err("%s: usb_get_intfdata() failed", __func__); 1848 return; 1849 } 1850 usb_set_intfdata (intf, NULL); 1851 1852 mutex_lock(&usbvision->lock); 1853 1854 // At this time we ask to cancel outstanding URBs 1855 usbvision_stop_isoc(usbvision); 1856 1857 if (usbvision->power) { 1858 usbvision_i2c_unregister(usbvision); 1859 usbvision_power_off(usbvision); 1860 } 1861 usbvision->remove_pending = 1; // Now all ISO data will be ignored 1862 1863 usb_put_dev(usbvision->dev); 1864 usbvision->dev = NULL; // USB device is no more 1865 1866 mutex_unlock(&usbvision->lock); 1867 1868 if (usbvision->user) { 1869 printk(KERN_INFO "%s: In use, disconnect pending\n", 1870 __func__); 1871 wake_up_interruptible(&usbvision->wait_frame); 1872 wake_up_interruptible(&usbvision->wait_stream); 1873 } else { 1874 usbvision_release(usbvision); 1875 } 1876 1877 PDEBUG(DBG_PROBE, "success"); 1878} 1879 1880static struct usb_driver usbvision_driver = { 1881 .name = "usbvision", 1882 .id_table = usbvision_table, 1883 .probe = usbvision_probe, 1884 .disconnect = usbvision_disconnect 1885}; 1886 1887/* 1888 * usbvision_init() 1889 * 1890 * This code is run to initialize the driver. 1891 * 1892 */ 1893static int __init usbvision_init(void) 1894{ 1895 int errCode; 1896 1897 PDEBUG(DBG_PROBE, ""); 1898 1899 PDEBUG(DBG_IO, "IO debugging is enabled [video]"); 1900 PDEBUG(DBG_PROBE, "PROBE debugging is enabled [video]"); 1901 PDEBUG(DBG_MMAP, "MMAP debugging is enabled [video]"); 1902 1903 /* disable planar mode support unless compression enabled */ 1904 if (isocMode != ISOC_MODE_COMPRESS ) { 1905 // FIXME : not the right way to set supported flag 1906 usbvision_v4l2_format[6].supported = 0; // V4L2_PIX_FMT_YVU420 1907 usbvision_v4l2_format[7].supported = 0; // V4L2_PIX_FMT_YUV422P 1908 } 1909 1910 errCode = usb_register(&usbvision_driver); 1911 1912 if (errCode == 0) { 1913 printk(KERN_INFO DRIVER_DESC " : " USBVISION_VERSION_STRING "\n"); 1914 PDEBUG(DBG_PROBE, "success"); 1915 } 1916 return errCode; 1917} 1918 1919static void __exit usbvision_exit(void) 1920{ 1921 PDEBUG(DBG_PROBE, ""); 1922 1923 usb_deregister(&usbvision_driver); 1924 PDEBUG(DBG_PROBE, "success"); 1925} 1926 1927module_init(usbvision_init); 1928module_exit(usbvision_exit); 1929 1930/* 1931 * Overrides for Emacs so that we follow Linus's tabbing style. 1932 * --------------------------------------------------------------------------- 1933 * Local variables: 1934 * c-basic-offset: 8 1935 * End: 1936 */ 1937