This commit was manufactured by cvs2svn to create branch 'vserver'.
[linux-2.6.git] / drivers / media / video / usbvision / usbvision-video.c
diff --git a/drivers/media/video/usbvision/usbvision-video.c b/drivers/media/video/usbvision/usbvision-video.c
new file mode 100644 (file)
index 0000000..7243337
--- /dev/null
@@ -0,0 +1,2088 @@
+/*
+ * USB USBVISION Video device driver 0.9.9
+ *
+ *
+ *
+ * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
+ *
+ * This module is part of usbvision driver project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Let's call the version 0.... until compression decoding is completely
+ * implemented.
+ *
+ * This driver is written by Jose Ignacio Gijon and Joerg Heckenbach.
+ * It was based on USB CPiA driver written by Peter Pregler,
+ * Scott J. Bertin and Johannes Erdfelt
+ * Ideas are taken from bttv driver by Ralph Metzler, Marcus Metzler &
+ * Gerd Knorr and zoran 36120/36125 driver by Pauline Middelink
+ * Updates to driver completed by Dwaine P. Garden
+ *
+ *
+ * TODO:
+ *     - use submit_urb for all setup packets
+ *     - Fix memory settings for nt1004. It is 4 times as big as the
+ *       nt1003 memory.
+ *     - Add audio on endpoint 3 for nt1004 chip.  Seems impossible, needs a codec interface.  Which one?
+ *     - Clean up the driver.
+ *     - optimization for performance.
+ *     - Add Videotext capability (VBI).  Working on it.....
+ *     - Check audio for other devices
+ *
+ */
+
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/utsname.h>
+#include <linux/highmem.h>
+#include <linux/smp_lock.h>
+#include <linux/videodev.h>
+#include <linux/vmalloc.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/videodev2.h>
+#include <linux/video_decoder.h>
+#include <linux/i2c.h>
+
+#include <media/saa7115.h>
+#include <media/v4l2-common.h>
+#include <media/tuner.h>
+#include <media/audiochip.h>
+
+#include <linux/moduleparam.h>
+#include <linux/workqueue.h>
+
+#ifdef CONFIG_KMOD
+#include <linux/kmod.h>
+#endif
+
+#include "usbvision.h"
+
+#define DRIVER_AUTHOR "Joerg Heckenbach <joerg@heckenbach-aw.de>, Dwaine Garden <DwaineGarden@rogers.com>"
+#define DRIVER_NAME "usbvision"
+#define DRIVER_ALIAS "USBVision"
+#define DRIVER_DESC "USBVision USB Video Device Driver for Linux"
+#define DRIVER_LICENSE "GPL"
+#define USBVISION_DRIVER_VERSION_MAJOR 0
+#define USBVISION_DRIVER_VERSION_MINOR 9
+#define USBVISION_DRIVER_VERSION_PATCHLEVEL 9
+#define USBVISION_DRIVER_VERSION KERNEL_VERSION(USBVISION_DRIVER_VERSION_MAJOR,USBVISION_DRIVER_VERSION_MINOR,USBVISION_DRIVER_VERSION_PATCHLEVEL)
+#define USBVISION_VERSION_STRING __stringify(USBVISION_DRIVER_VERSION_MAJOR) "." __stringify(USBVISION_DRIVER_VERSION_MINOR) "." __stringify(USBVISION_DRIVER_VERSION_PATCHLEVEL)
+
+#define        ENABLE_HEXDUMP  0       /* Enable if you need it */
+
+
+#ifdef USBVISION_DEBUG
+       #define PDEBUG(level, fmt, args...) \
+               if (video_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args)
+#else
+       #define PDEBUG(level, fmt, args...) do {} while(0)
+#endif
+
+#define DBG_IOCTL      1<<0
+#define DBG_IO         1<<1
+#define DBG_PROBE      1<<2
+#define DBG_MMAP       1<<3
+
+//String operations
+#define rmspace(str)   while(*str==' ') str++;
+#define goto2next(str) while(*str!=' ') str++; while(*str==' ') str++;
+
+
+static int usbvision_nr = 0;                   // sequential number of usbvision device
+
+static struct usbvision_v4l2_format_st usbvision_v4l2_format[] = {
+       { 1, 1,  8, V4L2_PIX_FMT_GREY    , "GREY" },
+       { 1, 2, 16, V4L2_PIX_FMT_RGB565  , "RGB565" },
+       { 1, 3, 24, V4L2_PIX_FMT_RGB24   , "RGB24" },
+       { 1, 4, 32, V4L2_PIX_FMT_RGB32   , "RGB32" },
+       { 1, 2, 16, V4L2_PIX_FMT_RGB555  , "RGB555" },
+       { 1, 2, 16, V4L2_PIX_FMT_YUYV    , "YUV422" },
+       { 1, 2, 12, V4L2_PIX_FMT_YVU420  , "YUV420P" }, // 1.5 !
+       { 1, 2, 16, V4L2_PIX_FMT_YUV422P , "YUV422P" }
+};
+
+/* supported tv norms */
+static struct usbvision_tvnorm tvnorms[] = {
+       {
+               .name = "PAL",
+               .id = V4L2_STD_PAL,
+       }, {
+               .name = "NTSC",
+               .id = V4L2_STD_NTSC,
+       }, {
+                .name = "SECAM",
+                .id = V4L2_STD_SECAM,
+       }, {
+               .name = "PAL-M",
+               .id = V4L2_STD_PAL_M,
+       }
+};
+
+#define TVNORMS ARRAY_SIZE(tvnorms)
+
+// Function prototypes
+static void usbvision_release(struct usb_usbvision *usbvision);
+
+// Default initalization of device driver parameters
+static int isocMode = ISOC_MODE_COMPRESS;              // Set the default format for ISOC endpoint
+static int video_debug = 0;                            // Set the default Debug Mode of the device driver
+static int PowerOnAtOpen = 1;                          // Set the default device to power on at startup
+static int video_nr = -1;                              // Sequential Number of Video Device
+static int radio_nr = -1;                              // Sequential Number of Radio Device
+static int vbi_nr = -1;                                        // Sequential Number of VBI Device
+static char *CustomDevice=NULL;                                // Set as nothing....
+
+// Grab parameters for the device driver
+
+#if defined(module_param)                               // Showing parameters under SYSFS
+module_param(isocMode, int, 0444);
+module_param(video_debug, int, 0444);
+module_param(PowerOnAtOpen, int, 0444);
+module_param(video_nr, int, 0444);
+module_param(radio_nr, int, 0444);
+module_param(vbi_nr, int, 0444);
+module_param(CustomDevice, charp, 0444);
+#else                                                  // Old Style
+MODULE_PARAM(isocMode, "i");
+MODULE_PARM(video_debug, "i");                         // Grab the Debug Mode of the device driver
+MODULE_PARM(adjustCompression, "i");                   // Grab the compression to be adaptive
+MODULE_PARM(PowerOnAtOpen, "i");                       // Grab the device to power on at startup
+MODULE_PARM(SwitchSVideoInput, "i");                   // To help people with Black and White output with using s-video input.  Some cables and input device are wired differently.
+MODULE_PARM(video_nr, "i");                            // video_nr option allows to specify a certain /dev/videoX device (like /dev/video0 or /dev/video1 ...)
+MODULE_PARM(radio_nr, "i");                            // radio_nr option allows to specify a certain /dev/radioX device (like /dev/radio0 or /dev/radio1 ...)
+MODULE_PARM(vbi_nr, "i");                              // vbi_nr option allows to specify a certain /dev/vbiX device (like /dev/vbi0 or /dev/vbi1 ...)
+MODULE_PARM(CustomDevice, "s");                                // .... CustomDevice
+#endif
+
+MODULE_PARM_DESC(isocMode, " Set the default format for ISOC endpoint.  Default: 0x60 (Compression On)");
+MODULE_PARM_DESC(video_debug, " Set the default Debug Mode of the device driver.  Default: 0 (Off)");
+MODULE_PARM_DESC(PowerOnAtOpen, " Set the default device to power on when device is opened.  Default: 1 (On)");
+MODULE_PARM_DESC(video_nr, "Set video device number (/dev/videoX).  Default: -1 (autodetect)");
+MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX).  Default: -1 (autodetect)");
+MODULE_PARM_DESC(vbi_nr, "Set vbi device number (/dev/vbiX).  Default: -1 (autodetect)");
+MODULE_PARM_DESC(CustomDevice, " Define the fine tuning parameters for the device.  Default: null");
+
+
+// Misc stuff
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);
+MODULE_VERSION(USBVISION_VERSION_STRING);
+MODULE_ALIAS(DRIVER_ALIAS);
+
+
+/****************************************************************************************/
+/* SYSFS Code - Copied from the stv680.c usb module.                                   */
+/* Device information is located at /sys/class/video4linux/video0                      */
+/* Device parameters information is located at /sys/module/usbvision                    */
+/* Device USB Information is located at /sys/bus/usb/drivers/USBVision Video Grabber    */
+/****************************************************************************************/
+
+
+#define YES_NO(x) ((x) ? "Yes" : "No")
+
+static inline struct usb_usbvision *cd_to_usbvision(struct class_device *cd)
+{
+       struct video_device *vdev = container_of(cd, struct video_device, class_dev);
+       return video_get_drvdata(vdev);
+}
+
+static ssize_t show_version(struct class_device *cd, char *buf)
+{
+       return sprintf(buf, "%s\n", USBVISION_VERSION_STRING);
+}
+static CLASS_DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
+
+static ssize_t show_model(struct class_device *cd, char *buf)
+{
+       struct video_device *vdev = container_of(cd, struct video_device, class_dev);
+       struct usb_usbvision *usbvision = video_get_drvdata(vdev);
+       return sprintf(buf, "%s\n", usbvision_device_data[usbvision->DevModel].ModelString);
+}
+static CLASS_DEVICE_ATTR(model, S_IRUGO, show_model, NULL);
+
+static ssize_t show_hue(struct class_device *cd, char *buf)
+{
+       struct video_device *vdev = container_of(cd, struct video_device, class_dev);
+       struct usb_usbvision *usbvision = video_get_drvdata(vdev);
+       struct v4l2_control ctrl;
+       ctrl.id = V4L2_CID_HUE;
+       ctrl.value = 0;
+       if(usbvision->user)
+               call_i2c_clients(usbvision, VIDIOC_G_CTRL, &ctrl);
+       return sprintf(buf, "%d\n", ctrl.value >> 8);
+}
+static CLASS_DEVICE_ATTR(hue, S_IRUGO, show_hue, NULL);
+
+static ssize_t show_contrast(struct class_device *cd, char *buf)
+{
+       struct video_device *vdev = container_of(cd, struct video_device, class_dev);
+       struct usb_usbvision *usbvision = video_get_drvdata(vdev);
+       struct v4l2_control ctrl;
+       ctrl.id = V4L2_CID_CONTRAST;
+       ctrl.value = 0;
+       if(usbvision->user)
+               call_i2c_clients(usbvision, VIDIOC_G_CTRL, &ctrl);
+       return sprintf(buf, "%d\n", ctrl.value >> 8);
+}
+static CLASS_DEVICE_ATTR(contrast, S_IRUGO, show_contrast, NULL);
+
+static ssize_t show_brightness(struct class_device *cd, char *buf)
+{
+       struct video_device *vdev = container_of(cd, struct video_device, class_dev);
+       struct usb_usbvision *usbvision = video_get_drvdata(vdev);
+       struct v4l2_control ctrl;
+       ctrl.id = V4L2_CID_BRIGHTNESS;
+       ctrl.value = 0;
+       if(usbvision->user)
+               call_i2c_clients(usbvision, VIDIOC_G_CTRL, &ctrl);
+       return sprintf(buf, "%d\n", ctrl.value >> 8);
+}
+static CLASS_DEVICE_ATTR(brightness, S_IRUGO, show_brightness, NULL);
+
+static ssize_t show_saturation(struct class_device *cd, char *buf)
+{
+       struct video_device *vdev = container_of(cd, struct video_device, class_dev);
+       struct usb_usbvision *usbvision = video_get_drvdata(vdev);
+       struct v4l2_control ctrl;
+       ctrl.id = V4L2_CID_SATURATION;
+       ctrl.value = 0;
+       if(usbvision->user)
+               call_i2c_clients(usbvision, VIDIOC_G_CTRL, &ctrl);
+       return sprintf(buf, "%d\n", ctrl.value >> 8);
+}
+static CLASS_DEVICE_ATTR(saturation, S_IRUGO, show_saturation, NULL);
+
+static ssize_t show_streaming(struct class_device *cd, char *buf)
+{
+       struct video_device *vdev = container_of(cd, struct video_device, class_dev);
+       struct usb_usbvision *usbvision = video_get_drvdata(vdev);
+       return sprintf(buf, "%s\n", YES_NO(usbvision->streaming==Stream_On?1:0));
+}
+static CLASS_DEVICE_ATTR(streaming, S_IRUGO, show_streaming, NULL);
+
+static ssize_t show_compression(struct class_device *cd, char *buf)
+{
+       struct video_device *vdev = container_of(cd, struct video_device, class_dev);
+       struct usb_usbvision *usbvision = video_get_drvdata(vdev);
+       return sprintf(buf, "%s\n", YES_NO(usbvision->isocMode==ISOC_MODE_COMPRESS));
+}
+static CLASS_DEVICE_ATTR(compression, S_IRUGO, show_compression, NULL);
+
+static ssize_t show_device_bridge(struct class_device *cd, char *buf)
+{
+       struct video_device *vdev = container_of(cd, struct video_device, class_dev);
+       struct usb_usbvision *usbvision = video_get_drvdata(vdev);
+       return sprintf(buf, "%d\n", usbvision->bridgeType);
+}
+static CLASS_DEVICE_ATTR(bridge, S_IRUGO, show_device_bridge, NULL);
+
+static void usbvision_create_sysfs(struct video_device *vdev)
+{
+       int res;
+       if (!vdev)
+               return;
+       do {
+               res=class_device_create_file(&vdev->class_dev,
+                                            &class_device_attr_version);
+               if (res<0)
+                       break;
+               res=class_device_create_file(&vdev->class_dev,
+                                            &class_device_attr_model);
+               if (res<0)
+                       break;
+               res=class_device_create_file(&vdev->class_dev,
+                                            &class_device_attr_hue);
+               if (res<0)
+                       break;
+               res=class_device_create_file(&vdev->class_dev,
+                                            &class_device_attr_contrast);
+               if (res<0)
+                       break;
+               res=class_device_create_file(&vdev->class_dev,
+                                            &class_device_attr_brightness);
+               if (res<0)
+                       break;
+               res=class_device_create_file(&vdev->class_dev,
+                                            &class_device_attr_saturation);
+               if (res<0)
+                       break;
+               res=class_device_create_file(&vdev->class_dev,
+                                            &class_device_attr_streaming);
+               if (res<0)
+                       break;
+               res=class_device_create_file(&vdev->class_dev,
+                                            &class_device_attr_compression);
+               if (res<0)
+                       break;
+               res=class_device_create_file(&vdev->class_dev,
+                                            &class_device_attr_bridge);
+               if (res>=0)
+                       return;
+       } while (0);
+
+       err("%s error: %d\n", __FUNCTION__, res);
+}
+
+static void usbvision_remove_sysfs(struct video_device *vdev)
+{
+       if (vdev) {
+               class_device_remove_file(&vdev->class_dev,
+                                        &class_device_attr_version);
+               class_device_remove_file(&vdev->class_dev,
+                                        &class_device_attr_model);
+               class_device_remove_file(&vdev->class_dev,
+                                        &class_device_attr_hue);
+               class_device_remove_file(&vdev->class_dev,
+                                        &class_device_attr_contrast);
+               class_device_remove_file(&vdev->class_dev,
+                                        &class_device_attr_brightness);
+               class_device_remove_file(&vdev->class_dev,
+                                        &class_device_attr_saturation);
+               class_device_remove_file(&vdev->class_dev,
+                                        &class_device_attr_streaming);
+               class_device_remove_file(&vdev->class_dev,
+                                        &class_device_attr_compression);
+               class_device_remove_file(&vdev->class_dev,
+                                        &class_device_attr_bridge);
+       }
+}
+
+
+/*
+ * usbvision_open()
+ *
+ * This is part of Video 4 Linux API. The driver can be opened by one
+ * client only (checks internal counter 'usbvision->user'). The procedure
+ * then allocates buffers needed for video processing.
+ *
+ */
+static int usbvision_v4l2_open(struct inode *inode, struct file *file)
+{
+       struct video_device *dev = video_devdata(file);
+       struct usb_usbvision *usbvision = (struct usb_usbvision *) video_get_drvdata(dev);
+       int errCode = 0;
+
+       PDEBUG(DBG_IO, "open");
+
+
+       usbvision_reset_powerOffTimer(usbvision);
+
+       if (usbvision->user)
+               errCode = -EBUSY;
+       else {
+               /* Allocate memory for the frame buffers */
+               errCode = usbvision_frames_alloc(usbvision);
+               if(!errCode) {
+                       /* Allocate memory for the scratch ring buffer */
+                       errCode = usbvision_scratch_alloc(usbvision);
+                       if ((!errCode) && (isocMode==ISOC_MODE_COMPRESS)) {
+                               /* Allocate intermediate decompression buffers only if needed */
+                               errCode = usbvision_decompress_alloc(usbvision);
+                       }
+               }
+               if (errCode) {
+                       /* Deallocate all buffers if trouble */
+                       usbvision_frames_free(usbvision);
+                       usbvision_scratch_free(usbvision);
+                       usbvision_decompress_free(usbvision);
+               }
+       }
+
+       /* If so far no errors then we shall start the camera */
+       if (!errCode) {
+               down(&usbvision->lock);
+               if (usbvision->power == 0) {
+                       usbvision_power_on(usbvision);
+                       usbvision_init_i2c(usbvision);
+               }
+
+               /* Send init sequence only once, it's large! */
+               if (!usbvision->initialized) {
+                       int setup_ok = 0;
+                       setup_ok = usbvision_setup(usbvision,isocMode);
+                       if (setup_ok)
+                               usbvision->initialized = 1;
+                       else
+                               errCode = -EBUSY;
+               }
+
+               if (!errCode) {
+                       usbvision_begin_streaming(usbvision);
+                       errCode = usbvision_init_isoc(usbvision);
+                       /* device needs to be initialized before isoc transfer */
+                       usbvision_muxsel(usbvision,0);
+                       usbvision->user++;
+               }
+               else {
+                       if (PowerOnAtOpen) {
+                               usbvision_i2c_usb_del_bus(&usbvision->i2c_adap);
+                               usbvision_power_off(usbvision);
+                               usbvision->initialized = 0;
+                       }
+               }
+               up(&usbvision->lock);
+       }
+
+       if (errCode) {
+       }
+
+       /* prepare queues */
+       usbvision_empty_framequeues(usbvision);
+
+       PDEBUG(DBG_IO, "success");
+       return errCode;
+}
+
+/*
+ * usbvision_v4l2_close()
+ *
+ * This is part of Video 4 Linux API. The procedure
+ * stops streaming and deallocates all buffers that were earlier
+ * allocated in usbvision_v4l2_open().
+ *
+ */
+static int usbvision_v4l2_close(struct inode *inode, struct file *file)
+{
+       struct video_device *dev = video_devdata(file);
+       struct usb_usbvision *usbvision = (struct usb_usbvision *) video_get_drvdata(dev);
+
+       PDEBUG(DBG_IO, "close");
+       down(&usbvision->lock);
+
+       usbvision_audio_off(usbvision);
+       usbvision_restart_isoc(usbvision);
+       usbvision_stop_isoc(usbvision);
+
+       usbvision_decompress_free(usbvision);
+       usbvision_frames_free(usbvision);
+       usbvision_scratch_free(usbvision);
+
+       usbvision->user--;
+
+       if (PowerOnAtOpen) {
+               /* power off in a little while to avoid off/on every close/open short sequences */
+               usbvision_set_powerOffTimer(usbvision);
+               usbvision->initialized = 0;
+       }
+
+       up(&usbvision->lock);
+
+       if (usbvision->remove_pending) {
+               info("%s: Final disconnect", __FUNCTION__);
+               usbvision_release(usbvision);
+       }
+
+       PDEBUG(DBG_IO, "success");
+
+
+       return 0;
+}
+
+
+/*
+ * usbvision_ioctl()
+ *
+ * This is part of Video 4 Linux API. The procedure handles ioctl() calls.
+ *
+ */
+static int usbvision_v4l2_do_ioctl(struct inode *inode, struct file *file,
+                                unsigned int cmd, void *arg)
+{
+       struct video_device *dev = video_devdata(file);
+       struct usb_usbvision *usbvision = (struct usb_usbvision *) video_get_drvdata(dev);
+
+       if (!USBVISION_IS_OPERATIONAL(usbvision))
+               return -EFAULT;
+
+       switch (cmd) {
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+               /* ioctls to allow direct acces to the NT100x registers */
+               case VIDIOC_INT_G_REGISTER:
+               {
+                       struct v4l2_register *reg = arg;
+                       int errCode;
+
+                       if (reg->i2c_id != 0)
+                               return -EINVAL;
+                       /* NT100x has a 8-bit register space */
+                       errCode = usbvision_read_reg(usbvision, reg->reg&0xff);
+                       if (errCode < 0) {
+                               err("%s: VIDIOC_INT_G_REGISTER failed: error %d", __FUNCTION__, errCode);
+                       }
+                       else {
+                               reg->val=(unsigned char)errCode;
+                               PDEBUG(DBG_IOCTL, "VIDIOC_INT_G_REGISTER reg=0x%02X, value=0x%02X",
+                                                       (unsigned int)reg->reg, reg->val);
+                               errCode = 0; // No error
+                       }
+                       return errCode;
+               }
+               case VIDIOC_INT_S_REGISTER:
+               {
+                       struct v4l2_register *reg = arg;
+                       int errCode;
+
+                       if (reg->i2c_id != 0)
+                               return -EINVAL;
+                       if (!capable(CAP_SYS_ADMIN))
+                               return -EPERM;
+                       errCode = usbvision_write_reg(usbvision, reg->reg&0xff, reg->val);
+                       if (errCode < 0) {
+                               err("%s: VIDIOC_INT_S_REGISTER failed: error %d", __FUNCTION__, errCode);
+                       }
+                       else {
+                               PDEBUG(DBG_IOCTL, "VIDIOC_INT_S_REGISTER reg=0x%02X, value=0x%02X",
+                                                       (unsigned int)reg->reg, reg->val);
+                               errCode = 0;
+                       }
+                       return 0;
+               }
+#endif
+               case VIDIOC_QUERYCAP:
+               {
+                       struct v4l2_capability *vc=arg;
+
+                       memset(vc, 0, sizeof(*vc));
+                       strlcpy(vc->driver, "USBVision", sizeof(vc->driver));
+                       strlcpy(vc->card, usbvision_device_data[usbvision->DevModel].ModelString,
+                               sizeof(vc->card));
+                       strlcpy(vc->bus_info, usbvision->dev->dev.bus_id,
+                               sizeof(vc->bus_info));
+                       vc->version = USBVISION_DRIVER_VERSION;
+                       vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
+                               V4L2_CAP_AUDIO |
+                               V4L2_CAP_READWRITE |
+                               V4L2_CAP_STREAMING |
+                               (usbvision->have_tuner ? V4L2_CAP_TUNER : 0);
+                       PDEBUG(DBG_IOCTL, "VIDIOC_QUERYCAP");
+                       return 0;
+               }
+               case VIDIOC_ENUMINPUT:
+               {
+                       struct v4l2_input *vi = arg;
+                       int chan;
+
+                       if ((vi->index >= usbvision->video_inputs) || (vi->index < 0) )
+                               return -EINVAL;
+                       if (usbvision->have_tuner) {
+                               chan = vi->index;
+                       }
+                       else {
+                               chan = vi->index + 1; //skip Television string
+                       }
+                       switch(chan) {
+                               case 0:
+                                       if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
+                                               strcpy(vi->name, "White Video Input");
+                                       }
+                                       else {
+                                               strcpy(vi->name, "Television");
+                                               vi->type = V4L2_INPUT_TYPE_TUNER;
+                                               vi->audioset = 1;
+                                               vi->tuner = chan;
+                                               vi->std = V4L2_STD_PAL | V4L2_STD_NTSC | V4L2_STD_SECAM;
+                                       }
+                                       break;
+                               case 1:
+                                       vi->type = V4L2_INPUT_TYPE_CAMERA;
+                                       if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
+                                               strcpy(vi->name, "Green Video Input");
+                                       }
+                                       else {
+                                               strcpy(vi->name, "Composite Video Input");
+                                       }
+                                       vi->std = V4L2_STD_PAL;
+                                       break;
+                               case 2:
+                                       vi->type = V4L2_INPUT_TYPE_CAMERA;
+                                       if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
+                                               strcpy(vi->name, "Yellow Video Input");
+                                       }
+                                       else {
+                                       strcpy(vi->name, "S-Video Input");
+                                       }
+                                       vi->std = V4L2_STD_PAL;
+                                       break;
+                               case 3:
+                                       vi->type = V4L2_INPUT_TYPE_CAMERA;
+                                       strcpy(vi->name, "Red Video Input");
+                                       vi->std = V4L2_STD_PAL;
+                                       break;
+                       }
+                       PDEBUG(DBG_IOCTL, "VIDIOC_ENUMINPUT name=%s:%d tuners=%d type=%d norm=%x",
+                              vi->name, vi->index, vi->tuner,vi->type,(int)vi->std);
+                       return 0;
+               }
+               case VIDIOC_ENUMSTD:
+               {
+                       struct v4l2_standard *e = arg;
+                       unsigned int i;
+                       int ret;
+
+                       i = e->index;
+                       if (i >= TVNORMS)
+                               return -EINVAL;
+                       ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
+                                                      tvnorms[e->index].name);
+                       e->index = i;
+                       if (ret < 0)
+                               return ret;
+                       return 0;
+               }
+               case VIDIOC_G_INPUT:
+               {
+                       int *input = arg;
+                       *input = usbvision->ctl_input;
+                       return 0;
+               }
+               case VIDIOC_S_INPUT:
+               {
+                       int *input = arg;
+                       if ((*input >= usbvision->video_inputs) || (*input < 0) )
+                               return -EINVAL;
+                       usbvision->ctl_input = *input;
+
+                       down(&usbvision->lock);
+                       usbvision_muxsel(usbvision, usbvision->ctl_input);
+                       usbvision_set_input(usbvision);
+                       usbvision_set_output(usbvision, usbvision->curwidth, usbvision->curheight);
+                       up(&usbvision->lock);
+                       return 0;
+               }
+               case VIDIOC_G_STD:
+               {
+                       v4l2_std_id *id = arg;
+
+                       *id = usbvision->tvnorm->id;
+
+                       PDEBUG(DBG_IOCTL, "VIDIOC_G_STD std_id=%s", usbvision->tvnorm->name);
+                       return 0;
+               }
+               case VIDIOC_S_STD:
+               {
+                       v4l2_std_id *id = arg;
+                       unsigned int i;
+
+                       for (i = 0; i < TVNORMS; i++)
+                               if (*id == tvnorms[i].id)
+                                       break;
+                       if (i == TVNORMS)
+                               for (i = 0; i < TVNORMS; i++)
+                                       if (*id & tvnorms[i].id)
+                                               break;
+                       if (i == TVNORMS)
+                               return -EINVAL;
+
+                       down(&usbvision->lock);
+                       usbvision->tvnorm = &tvnorms[i];
+
+                       call_i2c_clients(usbvision, VIDIOC_S_STD,
+                                        &usbvision->tvnorm->id);
+
+                       up(&usbvision->lock);
+
+                       PDEBUG(DBG_IOCTL, "VIDIOC_S_STD std_id=%s", usbvision->tvnorm->name);
+                       return 0;
+               }
+               case VIDIOC_G_TUNER:
+               {
+                       struct v4l2_tuner *vt = arg;
+
+                       if (!usbvision->have_tuner || vt->index)        // Only tuner 0
+                               return -EINVAL;
+                       strcpy(vt->name, "Television");
+                       /* Let clients fill in the remainder of this struct */
+                       call_i2c_clients(usbvision,VIDIOC_G_TUNER,vt);
+
+                       PDEBUG(DBG_IOCTL, "VIDIOC_G_TUNER signal=%x, afc=%x",vt->signal,vt->afc);
+                       return 0;
+               }
+               case VIDIOC_S_TUNER:
+               {
+                       struct v4l2_tuner *vt = arg;
+
+                       // Only no or one tuner for now
+                       if (!usbvision->have_tuner || vt->index)
+                               return -EINVAL;
+                       /* let clients handle this */
+                       call_i2c_clients(usbvision,VIDIOC_S_TUNER,vt);
+
+                       PDEBUG(DBG_IOCTL, "VIDIOC_S_TUNER");
+                       return 0;
+               }
+               case VIDIOC_G_FREQUENCY:
+               {
+                       struct v4l2_frequency *freq = arg;
+
+                       freq->tuner = 0; // Only one tuner
+                       freq->type = V4L2_TUNER_ANALOG_TV;
+                       freq->frequency = usbvision->freq;
+                       PDEBUG(DBG_IOCTL, "VIDIOC_G_FREQUENCY freq=0x%X", (unsigned)freq->frequency);
+                       return 0;
+               }
+               case VIDIOC_S_FREQUENCY:
+               {
+                       struct v4l2_frequency *freq = arg;
+
+                       // Only no or one tuner for now
+                       if (!usbvision->have_tuner || freq->tuner)
+                               return -EINVAL;
+
+                       usbvision->freq = freq->frequency;
+                       call_i2c_clients(usbvision, cmd, freq);
+                       PDEBUG(DBG_IOCTL, "VIDIOC_S_FREQUENCY freq=0x%X", (unsigned)freq->frequency);
+                       return 0;
+               }
+               case VIDIOC_G_AUDIO:
+               {
+                       struct v4l2_audio *v = arg;
+                       memset(v,0, sizeof(v));
+                       strcpy(v->name, "TV");
+                       PDEBUG(DBG_IOCTL, "VIDIOC_G_AUDIO");
+                       return 0;
+               }
+               case VIDIOC_S_AUDIO:
+               {
+                       struct v4l2_audio *v = arg;
+                       if(v->index) {
+                               return -EINVAL;
+                       }
+                       PDEBUG(DBG_IOCTL, "VIDIOC_S_AUDIO");
+                       return 0;
+               }
+               case VIDIOC_QUERYCTRL:
+               {
+                       struct v4l2_queryctrl *ctrl = arg;
+                       int id=ctrl->id;
+
+                       memset(ctrl,0,sizeof(*ctrl));
+                       ctrl->id=id;
+
+                       call_i2c_clients(usbvision, cmd, arg);
+
+                       if (ctrl->type)
+                               return 0;
+                       else
+                               return -EINVAL;
+
+                       PDEBUG(DBG_IOCTL,"VIDIOC_QUERYCTRL id=%x value=%x",ctrl->id,ctrl->type);
+               }
+               case VIDIOC_G_CTRL:
+               {
+                       struct v4l2_control *ctrl = arg;
+                       PDEBUG(DBG_IOCTL,"VIDIOC_G_CTRL id=%x value=%x",ctrl->id,ctrl->value);
+                       call_i2c_clients(usbvision, VIDIOC_G_CTRL, ctrl);
+                       return 0;
+               }
+               case VIDIOC_S_CTRL:
+               {
+                       struct v4l2_control *ctrl = arg;
+
+                       PDEBUG(DBG_IOCTL, "VIDIOC_S_CTRL id=%x value=%x",ctrl->id,ctrl->value);
+                       call_i2c_clients(usbvision, VIDIOC_S_CTRL, ctrl);
+                       return 0;
+               }
+               case VIDIOC_REQBUFS:
+               {
+                       struct v4l2_requestbuffers *vr = arg;
+                       int ret;
+
+                       RESTRICT_TO_RANGE(vr->count,1,USBVISION_NUMFRAMES);
+
+                       // Check input validity : the user must do a VIDEO CAPTURE and MMAP method.
+                       if((vr->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
+                          (vr->memory != V4L2_MEMORY_MMAP))
+                               return -EINVAL;
+
+                       if(usbvision->streaming == Stream_On) {
+                               if ((ret = usbvision_stream_interrupt(usbvision)))
+                                   return ret;
+                       }
+
+                       usbvision_empty_framequeues(usbvision);
+
+                       usbvision->curFrame = NULL;
+
+                       PDEBUG(DBG_IOCTL, "VIDIOC_REQBUFS count=%d",vr->count);
+                       return 0;
+               }
+               case VIDIOC_QUERYBUF:
+               {
+                       struct v4l2_buffer *vb = arg;
+                       struct usbvision_frame *frame;
+
+                       // FIXME : must control that buffers are mapped (VIDIOC_REQBUFS has been called)
+
+                       if(vb->type != V4L2_CAP_VIDEO_CAPTURE) {
+                               return -EINVAL;
+                       }
+                       if(vb->index>=USBVISION_NUMFRAMES)  {
+                               return -EINVAL;
+                       }
+                       // Updating the corresponding frame state
+                       vb->flags = 0;
+                       frame = &usbvision->frame[vb->index];
+                       if(frame->grabstate >= FrameState_Ready)
+                               vb->flags |= V4L2_BUF_FLAG_QUEUED;
+                       if(frame->grabstate >= FrameState_Done)
+                               vb->flags |= V4L2_BUF_FLAG_DONE;
+                       if(frame->grabstate == FrameState_Unused)
+                               vb->flags |= V4L2_BUF_FLAG_MAPPED;
+                       vb->memory = V4L2_MEMORY_MMAP;
+
+                       vb->m.offset = vb->index*usbvision->max_frame_size;
+
+                       vb->memory = V4L2_MEMORY_MMAP;
+                       vb->field = V4L2_FIELD_NONE;
+                       vb->length = usbvision->curwidth*usbvision->curheight*usbvision->palette.bytes_per_pixel;
+                       vb->timestamp = usbvision->frame[vb->index].timestamp;
+                       vb->sequence = usbvision->frame[vb->index].sequence;
+                       return 0;
+               }
+               case VIDIOC_QBUF:
+               {
+                       struct v4l2_buffer *vb = arg;
+                       struct usbvision_frame *frame;
+                       unsigned long lock_flags;
+
+                       // FIXME : works only on VIDEO_CAPTURE MODE, MMAP.
+                       if(vb->type != V4L2_CAP_VIDEO_CAPTURE) {
+                               return -EINVAL;
+                       }
+                       if(vb->index>=USBVISION_NUMFRAMES)  {
+                               return -EINVAL;
+                       }
+
+                       frame = &usbvision->frame[vb->index];
+
+                       if (frame->grabstate != FrameState_Unused) {
+                               return -EAGAIN;
+                       }
+
+                       /* Mark it as ready and enqueue frame */
+                       frame->grabstate = FrameState_Ready;
+                       frame->scanstate = ScanState_Scanning;
+                       frame->scanlength = 0;  /* Accumulated in usbvision_parse_data() */
+
+                       vb->flags &= ~V4L2_BUF_FLAG_DONE;
+
+                       /* set v4l2_format index */
+                       frame->v4l2_format = usbvision->palette;
+
+                       spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
+                       list_add_tail(&usbvision->frame[vb->index].frame, &usbvision->inqueue);
+                       spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
+
+                       PDEBUG(DBG_IOCTL, "VIDIOC_QBUF frame #%d",vb->index);
+                       return 0;
+               }
+               case VIDIOC_DQBUF:
+               {
+                       struct v4l2_buffer *vb = arg;
+                       int ret;
+                       struct usbvision_frame *f;
+                       unsigned long lock_flags;
+
+                       if (vb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+                               return -EINVAL;
+
+                       if (list_empty(&(usbvision->outqueue))) {
+                               if (usbvision->streaming == Stream_Idle)
+                                       return -EINVAL;
+                               ret = wait_event_interruptible
+                                       (usbvision->wait_frame,
+                                        !list_empty(&(usbvision->outqueue)));
+                               if (ret)
+                                       return ret;
+                       }
+
+                       spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
+                       f = list_entry(usbvision->outqueue.next,
+                                      struct usbvision_frame, frame);
+                       list_del(usbvision->outqueue.next);
+                       spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
+
+                       f->grabstate = FrameState_Unused;
+
+                       vb->memory = V4L2_MEMORY_MMAP;
+                       vb->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE;
+                       vb->index = f->index;
+                       vb->sequence = f->sequence;
+                       vb->timestamp = f->timestamp;
+                       vb->field = V4L2_FIELD_NONE;
+                       vb->bytesused = f->scanlength;
+
+                       return 0;
+               }
+               case VIDIOC_STREAMON:
+               {
+                       int b=V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+                       usbvision->streaming = Stream_On;
+
+                       call_i2c_clients(usbvision,VIDIOC_STREAMON , &b);
+
+                       PDEBUG(DBG_IOCTL, "VIDIOC_STREAMON");
+
+                       return 0;
+               }
+               case VIDIOC_STREAMOFF:
+               {
+                       int *type = arg;
+                       int b=V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+                       if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+                               return -EINVAL;
+
+                       if(usbvision->streaming == Stream_On) {
+                               usbvision_stream_interrupt(usbvision);
+                               // Stop all video streamings
+                               call_i2c_clients(usbvision,VIDIOC_STREAMOFF , &b);
+                       }
+                       usbvision_empty_framequeues(usbvision);
+
+                       PDEBUG(DBG_IOCTL, "VIDIOC_STREAMOFF");
+                       return 0;
+               }
+               case VIDIOC_ENUM_FMT:
+               {
+                       struct v4l2_fmtdesc *vfd = arg;
+
+                       if(vfd->index>=USBVISION_SUPPORTED_PALETTES-1) {
+                               return -EINVAL;
+                       }
+                       vfd->flags = 0;
+                       vfd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+                       strcpy(vfd->description,usbvision_v4l2_format[vfd->index].desc);
+                       vfd->pixelformat = usbvision_v4l2_format[vfd->index].format;
+                       memset(vfd->reserved, 0, sizeof(vfd->reserved));
+                       return 0;
+               }
+               case VIDIOC_G_FMT:
+               {
+                       struct v4l2_format *vf = arg;
+
+                       switch (vf->type) {
+                               case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+                               {
+                                       vf->fmt.pix.width = usbvision->curwidth;
+                                       vf->fmt.pix.height = usbvision->curheight;
+                                       vf->fmt.pix.pixelformat = usbvision->palette.format;
+                                       vf->fmt.pix.bytesperline =  usbvision->curwidth*usbvision->palette.bytes_per_pixel;
+                                       vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*usbvision->curheight;
+                                       vf->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+                                       vf->fmt.pix.field = V4L2_FIELD_NONE; /* Always progressive image */
+                                       PDEBUG(DBG_IOCTL, "VIDIOC_G_FMT w=%d, h=%d, format=%s",
+                                              vf->fmt.pix.width, vf->fmt.pix.height,usbvision->palette.desc);
+                                       return 0;
+                               }
+                               default:
+                                       PDEBUG(DBG_IOCTL, "VIDIOC_G_FMT invalid type %d",vf->type);
+                                       return -EINVAL;
+                       }
+                       return 0;
+               }
+               case VIDIOC_TRY_FMT:
+               case VIDIOC_S_FMT:
+               {
+                       struct v4l2_format *vf = arg;
+                       int formatIdx,ret;
+
+                       switch(vf->type) {
+                               case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+                               {
+                                       /* Find requested format in available ones */
+                                       for(formatIdx=0;formatIdx<USBVISION_SUPPORTED_PALETTES;formatIdx++) {
+                                               if(vf->fmt.pix.pixelformat == usbvision_v4l2_format[formatIdx].format) {
+                                                       usbvision->palette = usbvision_v4l2_format[formatIdx];
+                                                       break;
+                                               }
+                                       }
+                                       /* robustness */
+                                       if(formatIdx == USBVISION_SUPPORTED_PALETTES) {
+                                               return -EINVAL;
+                                       }
+                                       RESTRICT_TO_RANGE(vf->fmt.pix.width, MIN_FRAME_WIDTH, MAX_FRAME_WIDTH);
+                                       RESTRICT_TO_RANGE(vf->fmt.pix.height, MIN_FRAME_HEIGHT, MAX_FRAME_HEIGHT);
+
+                                       vf->fmt.pix.bytesperline = vf->fmt.pix.width*usbvision->palette.bytes_per_pixel;
+                                       vf->fmt.pix.sizeimage = vf->fmt.pix.bytesperline*vf->fmt.pix.height;
+
+                                       if(cmd == VIDIOC_TRY_FMT) {
+                                               PDEBUG(DBG_IOCTL, "VIDIOC_TRY_FMT grabdisplay w=%d, h=%d, format=%s",
+                                              vf->fmt.pix.width, vf->fmt.pix.height,usbvision->palette.desc);
+                                               return 0;
+                                       }
+
+                                       /* stop io in case it is already in progress */
+                                       if(usbvision->streaming == Stream_On) {
+                                               if ((ret = usbvision_stream_interrupt(usbvision)))
+                                                       return ret;
+                                       }
+                                       usbvision_empty_framequeues(usbvision);
+
+                                       usbvision->curFrame = NULL;
+
+                                       // by now we are committed to the new data...
+                                       down(&usbvision->lock);
+                                       usbvision_set_output(usbvision, vf->fmt.pix.width, vf->fmt.pix.height);
+                                       up(&usbvision->lock);
+
+                                       PDEBUG(DBG_IOCTL, "VIDIOC_S_FMT grabdisplay w=%d, h=%d, format=%s",
+                                              vf->fmt.pix.width, vf->fmt.pix.height,usbvision->palette.desc);
+                                       return 0;
+                               }
+                               default:
+                                       return -EINVAL;
+                       }
+               }
+               default:
+                       return -ENOIOCTLCMD;
+       }
+       return 0;
+}
+
+static int usbvision_v4l2_ioctl(struct inode *inode, struct file *file,
+                      unsigned int cmd, unsigned long arg)
+{
+       return video_usercopy(inode, file, cmd, arg, usbvision_v4l2_do_ioctl);
+}
+
+
+static ssize_t usbvision_v4l2_read(struct file *file, char *buf,
+                     size_t count, loff_t *ppos)
+{
+       struct video_device *dev = video_devdata(file);
+       struct usb_usbvision *usbvision = (struct usb_usbvision *) video_get_drvdata(dev);
+       int noblock = file->f_flags & O_NONBLOCK;
+       unsigned long lock_flags;
+
+       int ret,i;
+       struct usbvision_frame *frame;
+
+       PDEBUG(DBG_IO, "%s: %ld bytes, noblock=%d", __FUNCTION__, (unsigned long)count, noblock);
+
+       if (!USBVISION_IS_OPERATIONAL(usbvision) || (buf == NULL))
+               return -EFAULT;
+
+       /* no stream is running, make it running ! */
+       usbvision->streaming = Stream_On;
+       call_i2c_clients(usbvision,VIDIOC_STREAMON , NULL);
+
+       /* First, enqueue as many frames as possible (like a user of VIDIOC_QBUF would do) */
+       for(i=0;i<USBVISION_NUMFRAMES;i++) {
+               frame = &usbvision->frame[i];
+               if(frame->grabstate == FrameState_Unused) {
+                       /* Mark it as ready and enqueue frame */
+                       frame->grabstate = FrameState_Ready;
+                       frame->scanstate = ScanState_Scanning;
+                       frame->scanlength = 0;  /* Accumulated in usbvision_parse_data() */
+
+                       /* set v4l2_format index */
+                       frame->v4l2_format = usbvision->palette;
+
+                       spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
+                       list_add_tail(&frame->frame, &usbvision->inqueue);
+                       spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
+               }
+       }
+
+       /* Then try to steal a frame (like a VIDIOC_DQBUF would do) */
+       if (list_empty(&(usbvision->outqueue))) {
+               if(noblock)
+                       return -EAGAIN;
+
+               ret = wait_event_interruptible
+                       (usbvision->wait_frame,
+                        !list_empty(&(usbvision->outqueue)));
+               if (ret)
+                       return ret;
+       }
+
+       spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
+       frame = list_entry(usbvision->outqueue.next,
+                          struct usbvision_frame, frame);
+       list_del(usbvision->outqueue.next);
+       spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
+
+       /* An error returns an empty frame */
+       if (frame->grabstate == FrameState_Error) {
+               frame->bytes_read = 0;
+               return 0;
+       }
+
+       PDEBUG(DBG_IO, "%s: frmx=%d, bytes_read=%ld, scanlength=%ld", __FUNCTION__,
+                      frame->index, frame->bytes_read, frame->scanlength);
+
+       /* copy bytes to user space; we allow for partials reads */
+       if ((count + frame->bytes_read) > (unsigned long)frame->scanlength)
+               count = frame->scanlength - frame->bytes_read;
+
+       if (copy_to_user(buf, frame->data + frame->bytes_read, count)) {
+               return -EFAULT;
+       }
+
+       frame->bytes_read += count;
+       PDEBUG(DBG_IO, "%s: {copy} count used=%ld, new bytes_read=%ld", __FUNCTION__,
+                      (unsigned long)count, frame->bytes_read);
+
+       // For now, forget the frame if it has not been read in one shot.
+/*     if (frame->bytes_read >= frame->scanlength) {// All data has been read */
+               frame->bytes_read = 0;
+
+               /* Mark it as available to be used again. */
+               frame->grabstate = FrameState_Unused;
+/*     } */
+
+       return count;
+}
+
+static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
+{
+       unsigned long size = vma->vm_end - vma->vm_start,
+               start = vma->vm_start;
+       void *pos;
+       u32 i;
+
+       struct video_device *dev = video_devdata(file);
+       struct usb_usbvision *usbvision = (struct usb_usbvision *) video_get_drvdata(dev);
+
+       down(&usbvision->lock);
+
+       if (!USBVISION_IS_OPERATIONAL(usbvision)) {
+               up(&usbvision->lock);
+               return -EFAULT;
+       }
+
+       if (!(vma->vm_flags & VM_WRITE) ||
+           size != PAGE_ALIGN(usbvision->curwidth*usbvision->curheight*usbvision->palette.bytes_per_pixel)) {
+               up(&usbvision->lock);
+               return -EINVAL;
+       }
+
+       for (i = 0; i < USBVISION_NUMFRAMES; i++) {
+               if (((usbvision->max_frame_size*i) >> PAGE_SHIFT) == vma->vm_pgoff)
+                       break;
+       }
+       if (i == USBVISION_NUMFRAMES) {
+               PDEBUG(DBG_MMAP, "mmap: user supplied mapping address is out of range");
+               up(&usbvision->lock);
+               return -EINVAL;
+       }
+
+       /* VM_IO is eventually going to replace PageReserved altogether */
+       vma->vm_flags |= VM_IO;
+       vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
+
+       pos = usbvision->frame[i].data;
+       while (size > 0) {
+
+               if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
+                       PDEBUG(DBG_MMAP, "mmap: vm_insert_page failed");
+                       up(&usbvision->lock);
+                       return -EAGAIN;
+               }
+               start += PAGE_SIZE;
+               pos += PAGE_SIZE;
+               size -= PAGE_SIZE;
+       }
+
+       up(&usbvision->lock);
+       return 0;
+}
+
+
+/*
+ * Here comes the stuff for radio on usbvision based devices
+ *
+ */
+static int usbvision_radio_open(struct inode *inode, struct file *file)
+{
+       struct video_device *dev = video_devdata(file);
+       struct usb_usbvision *usbvision = (struct usb_usbvision *) video_get_drvdata(dev);
+       struct v4l2_frequency freq;
+       int errCode = 0;
+
+       PDEBUG(DBG_IO, "%s:", __FUNCTION__);
+
+       down(&usbvision->lock);
+
+       if (usbvision->user) {
+               err("%s: Someone tried to open an already opened USBVision Radio!", __FUNCTION__);
+               errCode = -EBUSY;
+       }
+       else {
+               if(PowerOnAtOpen) {
+                       usbvision_reset_powerOffTimer(usbvision);
+                       if (usbvision->power == 0) {
+                               usbvision_power_on(usbvision);
+                               usbvision_init_i2c(usbvision);
+                       }
+               }
+
+               // If so far no errors then we shall start the radio
+               usbvision->radio = 1;
+               call_i2c_clients(usbvision,AUDC_SET_RADIO,&usbvision->tuner_type);
+               freq.frequency = 1517; //SWR3 @ 94.8MHz
+               call_i2c_clients(usbvision, VIDIOC_S_FREQUENCY, &freq);
+               usbvision_set_audio(usbvision, USBVISION_AUDIO_RADIO);
+               usbvision->user++;
+       }
+
+       if (errCode) {
+               if (PowerOnAtOpen) {
+                       usbvision_i2c_usb_del_bus(&usbvision->i2c_adap);
+                       usbvision_power_off(usbvision);
+                       usbvision->initialized = 0;
+               }
+       }
+       up(&usbvision->lock);
+       return errCode;
+}
+
+
+static int usbvision_radio_close(struct inode *inode, struct file *file)
+{
+       struct video_device *dev = video_devdata(file);
+       struct usb_usbvision *usbvision = (struct usb_usbvision *) video_get_drvdata(dev);
+       int errCode = 0;
+
+       PDEBUG(DBG_IO, "");
+
+       down(&usbvision->lock);
+
+       usbvision_audio_off(usbvision);
+       usbvision->radio=0;
+       usbvision->user--;
+
+       if (PowerOnAtOpen) {
+               usbvision_set_powerOffTimer(usbvision);
+               usbvision->initialized = 0;
+       }
+
+       up(&usbvision->lock);
+
+       if (usbvision->remove_pending) {
+               info("%s: Final disconnect", __FUNCTION__);
+               usbvision_release(usbvision);
+       }
+
+
+       PDEBUG(DBG_IO, "success");
+
+       return errCode;
+}
+
+static int usbvision_do_radio_ioctl(struct inode *inode, struct file *file,
+                                unsigned int cmd, void *arg)
+{
+       struct video_device *dev = video_devdata(file);
+       struct usb_usbvision *usbvision = (struct usb_usbvision *) video_get_drvdata(dev);
+
+       if (!USBVISION_IS_OPERATIONAL(usbvision))
+               return -EIO;
+
+       switch (cmd) {
+               case VIDIOC_QUERYCAP:
+               {
+                       struct v4l2_capability *vc=arg;
+
+                       memset(vc, 0, sizeof(*vc));
+                       strlcpy(vc->driver, "USBVision", sizeof(vc->driver));
+                       strlcpy(vc->card, usbvision_device_data[usbvision->DevModel].ModelString,
+                               sizeof(vc->card));
+                       strlcpy(vc->bus_info, usbvision->dev->dev.bus_id,
+                               sizeof(vc->bus_info));
+                       vc->version = USBVISION_DRIVER_VERSION;
+                       vc->capabilities = (usbvision->have_tuner ? V4L2_CAP_TUNER : 0);
+                       PDEBUG(DBG_IO, "VIDIOC_QUERYCAP");
+                       return 0;
+               }
+               case VIDIOC_QUERYCTRL:
+               {
+                       struct v4l2_queryctrl *ctrl = arg;
+                       int id=ctrl->id;
+
+                       memset(ctrl,0,sizeof(*ctrl));
+                       ctrl->id=id;
+
+                       call_i2c_clients(usbvision, cmd, arg);
+                       PDEBUG(DBG_IO,"VIDIOC_QUERYCTRL id=%x value=%x",ctrl->id,ctrl->type);
+
+                       if (ctrl->type)
+                               return 0;
+                       else
+                               return -EINVAL;
+
+               }
+               case VIDIOC_G_CTRL:
+               {
+                       struct v4l2_control *ctrl = arg;
+
+                       call_i2c_clients(usbvision, VIDIOC_G_CTRL, ctrl);
+                       PDEBUG(DBG_IO,"VIDIOC_G_CTRL id=%x value=%x",ctrl->id,ctrl->value);
+                       return 0;
+               }
+               case VIDIOC_S_CTRL:
+               {
+                       struct v4l2_control *ctrl = arg;
+
+                       call_i2c_clients(usbvision, VIDIOC_S_CTRL, ctrl);
+                       PDEBUG(DBG_IO, "VIDIOC_S_CTRL id=%x value=%x",ctrl->id,ctrl->value);
+                       return 0;
+               }
+               case VIDIOC_G_TUNER:
+               {
+                       struct v4l2_tuner *t = arg;
+
+                       if (t->index > 0)
+                               return -EINVAL;
+
+                       memset(t,0,sizeof(*t));
+                       strcpy(t->name, "Radio");
+                       t->type = V4L2_TUNER_RADIO;
+
+                       /* Let clients fill in the remainder of this struct */
+                       call_i2c_clients(usbvision,VIDIOC_G_TUNER,t);
+                       PDEBUG(DBG_IO, "VIDIOC_G_TUNER signal=%x, afc=%x",t->signal,t->afc);
+                       return 0;
+               }
+               case VIDIOC_S_TUNER:
+               {
+                       struct v4l2_tuner *vt = arg;
+
+                       // Only no or one tuner for now
+                       if (!usbvision->have_tuner || vt->index)
+                               return -EINVAL;
+                       /* let clients handle this */
+                       call_i2c_clients(usbvision,VIDIOC_S_TUNER,vt);
+
+                       PDEBUG(DBG_IO, "VIDIOC_S_TUNER");
+                       return 0;
+               }
+               case VIDIOC_G_AUDIO:
+               {
+                       struct v4l2_audio *a = arg;
+
+                       memset(a,0,sizeof(*a));
+                       strcpy(a->name,"Radio");
+                       PDEBUG(DBG_IO, "VIDIOC_G_AUDIO");
+                       return 0;
+               }
+               case VIDIOC_S_AUDIO:
+               case VIDIOC_S_INPUT:
+               case VIDIOC_S_STD:
+               return 0;
+
+               case VIDIOC_G_FREQUENCY:
+               {
+                       struct v4l2_frequency *f = arg;
+
+                       memset(f,0,sizeof(*f));
+
+                       f->type = V4L2_TUNER_RADIO;
+                       f->frequency = usbvision->freq;
+                       call_i2c_clients(usbvision, cmd, f);
+                       PDEBUG(DBG_IO, "VIDIOC_G_FREQUENCY freq=0x%X", (unsigned)f->frequency);
+
+                       return 0;
+               }
+               case VIDIOC_S_FREQUENCY:
+               {
+                       struct v4l2_frequency *f = arg;
+
+                       if (f->tuner != 0)
+                               return -EINVAL;
+                       usbvision->freq = f->frequency;
+                       call_i2c_clients(usbvision, cmd, f);
+                       PDEBUG(DBG_IO, "VIDIOC_S_FREQUENCY freq=0x%X", (unsigned)f->frequency);
+
+                       return 0;
+               }
+               default:
+               {
+                       PDEBUG(DBG_IO, "%s: Unknown command %x", __FUNCTION__, cmd);
+                       return -ENOIOCTLCMD;
+               }
+       }
+       return 0;
+}
+
+
+static int usbvision_radio_ioctl(struct inode *inode, struct file *file,
+                      unsigned int cmd, unsigned long arg)
+{
+       return video_usercopy(inode, file, cmd, arg, usbvision_do_radio_ioctl);
+}
+
+
+/*
+ * Here comes the stuff for vbi on usbvision based devices
+ *
+ */
+static int usbvision_vbi_open(struct inode *inode, struct file *file)
+{
+       /* TODO */
+       return -EINVAL;
+
+}
+
+static int usbvision_vbi_close(struct inode *inode, struct file *file)
+{
+       /* TODO */
+       return -EINVAL;
+}
+
+static int usbvision_do_vbi_ioctl(struct inode *inode, struct file *file,
+                                unsigned int cmd, void *arg)
+{
+       /* TODO */
+       return -EINVAL;
+}
+
+static int usbvision_vbi_ioctl(struct inode *inode, struct file *file,
+                      unsigned int cmd, unsigned long arg)
+{
+       return video_usercopy(inode, file, cmd, arg, usbvision_do_vbi_ioctl);
+}
+
+
+//
+// Video registration stuff
+//
+
+// Video template
+static struct file_operations usbvision_fops = {
+       .owner             = THIS_MODULE,
+       .open           = usbvision_v4l2_open,
+       .release        = usbvision_v4l2_close,
+       .read           = usbvision_v4l2_read,
+       .mmap           = usbvision_v4l2_mmap,
+       .ioctl          = usbvision_v4l2_ioctl,
+       .llseek         = no_llseek,
+};
+static struct video_device usbvision_video_template = {
+       .owner             = THIS_MODULE,
+       .type           = VID_TYPE_TUNER | VID_TYPE_CAPTURE,
+       .hardware       = VID_HARDWARE_USBVISION,
+       .fops           = &usbvision_fops,
+       .name           = "usbvision-video",
+       .release        = video_device_release,
+       .minor          = -1,
+};
+
+
+// Radio template
+static struct file_operations usbvision_radio_fops = {
+       .owner             = THIS_MODULE,
+       .open           = usbvision_radio_open,
+       .release        = usbvision_radio_close,
+       .ioctl          = usbvision_radio_ioctl,
+       .llseek         = no_llseek,
+};
+
+static struct video_device usbvision_radio_template=
+{
+       .owner             = THIS_MODULE,
+       .type           = VID_TYPE_TUNER,
+       .hardware       = VID_HARDWARE_USBVISION,
+       .fops           = &usbvision_radio_fops,
+       .release        = video_device_release,
+       .name           = "usbvision-radio",
+       .minor          = -1,
+};
+
+
+// vbi template
+static struct file_operations usbvision_vbi_fops = {
+       .owner             = THIS_MODULE,
+       .open           = usbvision_vbi_open,
+       .release        = usbvision_vbi_close,
+       .ioctl          = usbvision_vbi_ioctl,
+       .llseek         = no_llseek,
+};
+
+static struct video_device usbvision_vbi_template=
+{
+       .owner             = THIS_MODULE,
+       .type           = VID_TYPE_TUNER,
+       .hardware       = VID_HARDWARE_USBVISION,
+       .fops           = &usbvision_vbi_fops,
+       .release        = video_device_release,
+       .name           = "usbvision-vbi",
+       .minor          = -1,
+};
+
+
+static struct video_device *usbvision_vdev_init(struct usb_usbvision *usbvision,
+                                       struct video_device *vdev_template,
+                                       char *name)
+{
+       struct usb_device *usb_dev = usbvision->dev;
+       struct video_device *vdev;
+
+       if (usb_dev == NULL) {
+               err("%s: usbvision->dev is not set", __FUNCTION__);
+               return NULL;
+       }
+
+       vdev = video_device_alloc();
+       if (NULL == vdev) {
+               return NULL;
+       }
+       *vdev = *vdev_template;
+//     vdev->minor   = -1;
+       vdev->dev     = &usb_dev->dev;
+       snprintf(vdev->name, sizeof(vdev->name), "%s", name);
+       video_set_drvdata(vdev, usbvision);
+       return vdev;
+}
+
+// unregister video4linux devices
+static void usbvision_unregister_video(struct usb_usbvision *usbvision)
+{
+       // vbi Device:
+       if (usbvision->vbi) {
+               PDEBUG(DBG_PROBE, "unregister /dev/vbi%d [v4l2]", usbvision->vbi->minor & 0x1f);
+               if (usbvision->vbi->minor != -1) {
+                       video_unregister_device(usbvision->vbi);
+               }
+               else {
+                       video_device_release(usbvision->vbi);
+               }
+               usbvision->vbi = NULL;
+       }
+
+       // Radio Device:
+       if (usbvision->rdev) {
+               PDEBUG(DBG_PROBE, "unregister /dev/radio%d [v4l2]", usbvision->rdev->minor & 0x1f);
+               if (usbvision->rdev->minor != -1) {
+                       video_unregister_device(usbvision->rdev);
+               }
+               else {
+                       video_device_release(usbvision->rdev);
+               }
+               usbvision->rdev = NULL;
+       }
+
+       // Video Device:
+       if (usbvision->vdev) {
+               PDEBUG(DBG_PROBE, "unregister /dev/video%d [v4l2]", usbvision->vdev->minor & 0x1f);
+               if (usbvision->vdev->minor != -1) {
+                       video_unregister_device(usbvision->vdev);
+               }
+               else {
+                       video_device_release(usbvision->vdev);
+               }
+               usbvision->vdev = NULL;
+       }
+}
+
+// register video4linux devices
+static int __devinit usbvision_register_video(struct usb_usbvision *usbvision)
+{
+       // Video Device:
+       usbvision->vdev = usbvision_vdev_init(usbvision, &usbvision_video_template, "USBVision Video");
+       if (usbvision->vdev == NULL) {
+               goto err_exit;
+       }
+       if (video_register_device(usbvision->vdev, VFL_TYPE_GRABBER, video_nr)<0) {
+               goto err_exit;
+       }
+       info("USBVision[%d]: registered USBVision Video device /dev/video%d [v4l2]", usbvision->nr,usbvision->vdev->minor & 0x1f);
+
+       // Radio Device:
+       if (usbvision_device_data[usbvision->DevModel].Radio) {
+               // usbvision has radio
+               usbvision->rdev = usbvision_vdev_init(usbvision, &usbvision_radio_template, "USBVision Radio");
+               if (usbvision->rdev == NULL) {
+                       goto err_exit;
+               }
+               if (video_register_device(usbvision->rdev, VFL_TYPE_RADIO, radio_nr)<0) {
+                       goto err_exit;
+               }
+               info("USBVision[%d]: registered USBVision Radio device /dev/radio%d [v4l2]", usbvision->nr, usbvision->rdev->minor & 0x1f);
+       }
+       // vbi Device:
+       if (usbvision_device_data[usbvision->DevModel].vbi) {
+               usbvision->vbi = usbvision_vdev_init(usbvision, &usbvision_vbi_template, "USBVision VBI");
+               if (usbvision->vdev == NULL) {
+                       goto err_exit;
+               }
+               if (video_register_device(usbvision->vbi, VFL_TYPE_VBI, vbi_nr)<0) {
+                       goto err_exit;
+               }
+               info("USBVision[%d]: registered USBVision VBI device /dev/vbi%d [v4l2] (Not Working Yet!)", usbvision->nr,usbvision->vbi->minor & 0x1f);
+       }
+       // all done
+       return 0;
+
+ err_exit:
+       err("USBVision[%d]: video_register_device() failed", usbvision->nr);
+       usbvision_unregister_video(usbvision);
+       return -1;
+}
+
+/*
+ * usbvision_alloc()
+ *
+ * This code allocates the struct usb_usbvision. It is filled with default values.
+ *
+ * Returns NULL on error, a pointer to usb_usbvision else.
+ *
+ */
+static struct usb_usbvision *usbvision_alloc(struct usb_device *dev)
+{
+       struct usb_usbvision *usbvision;
+
+       if ((usbvision = kzalloc(sizeof(struct usb_usbvision), GFP_KERNEL)) == NULL) {
+               goto err_exit;
+       }
+
+       usbvision->dev = dev;
+
+       init_MUTEX(&usbvision->lock);   /* to 1 == available */
+
+       // prepare control urb for control messages during interrupts
+       usbvision->ctrlUrb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
+       if (usbvision->ctrlUrb == NULL) {
+               goto err_exit;
+       }
+       init_waitqueue_head(&usbvision->ctrlUrb_wq);
+       init_MUTEX(&usbvision->ctrlUrbLock);    /* to 1 == available */
+
+       usbvision_init_powerOffTimer(usbvision);
+
+       return usbvision;
+
+err_exit:
+       if (usbvision && usbvision->ctrlUrb) {
+               usb_free_urb(usbvision->ctrlUrb);
+       }
+       if (usbvision) {
+               kfree(usbvision);
+       }
+       return NULL;
+}
+
+/*
+ * usbvision_release()
+ *
+ * This code does final release of struct usb_usbvision. This happens
+ * after the device is disconnected -and- all clients closed their files.
+ *
+ */
+static void usbvision_release(struct usb_usbvision *usbvision)
+{
+       PDEBUG(DBG_PROBE, "");
+
+       down(&usbvision->lock);
+
+       usbvision_reset_powerOffTimer(usbvision);
+
+       usbvision->initialized = 0;
+
+       up(&usbvision->lock);
+
+       usbvision_remove_sysfs(usbvision->vdev);
+       usbvision_unregister_video(usbvision);
+
+       if (usbvision->ctrlUrb) {
+               usb_free_urb(usbvision->ctrlUrb);
+       }
+
+       kfree(usbvision);
+
+       PDEBUG(DBG_PROBE, "success");
+}
+
+
+/******************************** usb interface *****************************************/
+
+static void usbvision_configure_video(struct usb_usbvision *usbvision)
+{
+       int model,i;
+
+       if (usbvision == NULL)
+               return;
+
+       model = usbvision->DevModel;
+       usbvision->palette = usbvision_v4l2_format[2]; // V4L2_PIX_FMT_RGB24;
+
+       if (usbvision_device_data[usbvision->DevModel].Vin_Reg2 >= 0) {
+               usbvision->Vin_Reg2_Preset = usbvision_device_data[usbvision->DevModel].Vin_Reg2 & 0xff;
+       } else {
+               usbvision->Vin_Reg2_Preset = 0;
+       }
+
+       for (i = 0; i < TVNORMS; i++)
+               if (usbvision_device_data[model].VideoNorm == tvnorms[i].mode)
+                       break;
+       if (i == TVNORMS)
+               i = 0;
+       usbvision->tvnorm = &tvnorms[i];        /* set default norm */
+
+       usbvision->video_inputs = usbvision_device_data[model].VideoChannels;
+       usbvision->ctl_input = 0;
+
+       /* This should be here to make i2c clients to be able to register */
+       usbvision_audio_off(usbvision); //first switch off audio
+       if (!PowerOnAtOpen) {
+               usbvision_power_on(usbvision);  //and then power up the noisy tuner
+               usbvision_init_i2c(usbvision);
+       }
+}
+
+/*
+ * usbvision_probe()
+ *
+ * This procedure queries device descriptor and accepts the interface
+ * if it looks like USBVISION video device
+ *
+ */
+static int __devinit usbvision_probe(struct usb_interface *intf, const struct usb_device_id *devid)
+{
+       struct usb_device *dev = interface_to_usbdev(intf);
+       __u8 ifnum = intf->altsetting->desc.bInterfaceNumber;
+       const struct usb_host_interface *interface;
+       struct usb_usbvision *usbvision = NULL;
+       const struct usb_endpoint_descriptor *endpoint;
+       int model;
+
+       PDEBUG(DBG_PROBE, "VID=%#04x, PID=%#04x, ifnum=%u",
+                                       dev->descriptor.idVendor, dev->descriptor.idProduct, ifnum);
+       /* Is it an USBVISION video dev? */
+       model = 0;
+       for(model = 0; usbvision_device_data[model].idVendor; model++) {
+               if (le16_to_cpu(dev->descriptor.idVendor) != usbvision_device_data[model].idVendor) {
+                       continue;
+               }
+               if (le16_to_cpu(dev->descriptor.idProduct) != usbvision_device_data[model].idProduct) {
+                       continue;
+               }
+
+               info("%s: %s found", __FUNCTION__, usbvision_device_data[model].ModelString);
+               break;
+       }
+
+       if (usbvision_device_data[model].idVendor == 0) {
+               return -ENODEV; //no matching device
+       }
+       if (usbvision_device_data[model].Interface >= 0) {
+               interface = &dev->actconfig->interface[usbvision_device_data[model].Interface]->altsetting[0];
+       }
+       else {
+               interface = &dev->actconfig->interface[ifnum]->altsetting[0];
+       }
+       endpoint = &interface->endpoint[1].desc;
+       if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC) {
+               err("%s: interface %d. has non-ISO endpoint!", __FUNCTION__, ifnum);
+               err("%s: Endpoint attribures %d", __FUNCTION__, endpoint->bmAttributes);
+               return -ENODEV;
+       }
+       if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
+               err("%s: interface %d. has ISO OUT endpoint!", __FUNCTION__, ifnum);
+               return -ENODEV;
+       }
+
+       usb_get_dev(dev);
+
+       if ((usbvision = usbvision_alloc(dev)) == NULL) {
+               err("%s: couldn't allocate USBVision struct", __FUNCTION__);
+               return -ENOMEM;
+       }
+       if (dev->descriptor.bNumConfigurations > 1) {
+               usbvision->bridgeType = BRIDGE_NT1004;
+       }
+       else if (usbvision_device_data[model].ModelString == "Dazzle Fusion Model DVC-90 Rev 1 (SECAM)") {
+               usbvision->bridgeType = BRIDGE_NT1005;
+       }
+       else {
+               usbvision->bridgeType = BRIDGE_NT1003;
+       }
+       PDEBUG(DBG_PROBE, "bridgeType %d", usbvision->bridgeType);
+
+       down(&usbvision->lock);
+
+       usbvision->nr = usbvision_nr++;
+
+       usbvision->have_tuner = usbvision_device_data[model].Tuner;
+       if (usbvision->have_tuner) {
+               usbvision->tuner_type = usbvision_device_data[model].TunerType;
+       }
+
+       usbvision->tuner_addr = ADDR_UNSET;
+
+       usbvision->DevModel = model;
+       usbvision->remove_pending = 0;
+       usbvision->iface = ifnum;
+       usbvision->ifaceAltInactive = 0;
+       usbvision->ifaceAltActive = 1;
+       usbvision->video_endp = endpoint->bEndpointAddress;
+       usbvision->isocPacketSize = 0;
+       usbvision->usb_bandwidth = 0;
+       usbvision->user = 0;
+       usbvision->streaming = Stream_Off;
+       usbvision_register_video(usbvision);
+       usbvision_configure_video(usbvision);
+       up(&usbvision->lock);
+
+
+       usb_set_intfdata (intf, usbvision);
+       usbvision_create_sysfs(usbvision->vdev);
+
+       PDEBUG(DBG_PROBE, "success");
+       return 0;
+}
+
+
+/*
+ * usbvision_disconnect()
+ *
+ * This procedure stops all driver activity, deallocates interface-private
+ * structure (pointed by 'ptr') and after that driver should be removable
+ * with no ill consequences.
+ *
+ */
+static void __devexit usbvision_disconnect(struct usb_interface *intf)
+{
+       struct usb_usbvision *usbvision = usb_get_intfdata(intf);
+
+       PDEBUG(DBG_PROBE, "");
+
+       if (usbvision == NULL) {
+               err("%s: usb_get_intfdata() failed", __FUNCTION__);
+               return;
+       }
+       usb_set_intfdata (intf, NULL);
+
+       down(&usbvision->lock);
+
+       // At this time we ask to cancel outstanding URBs
+       usbvision_stop_isoc(usbvision);
+
+       if (usbvision->power) {
+               usbvision_i2c_usb_del_bus(&usbvision->i2c_adap);
+               usbvision_power_off(usbvision);
+       }
+       usbvision->remove_pending = 1;  // Now all ISO data will be ignored
+
+       usb_put_dev(usbvision->dev);
+       usbvision->dev = NULL;  // USB device is no more
+
+       up(&usbvision->lock);
+
+       if (usbvision->user) {
+               info("%s: In use, disconnect pending", __FUNCTION__);
+               wake_up_interruptible(&usbvision->wait_frame);
+               wake_up_interruptible(&usbvision->wait_stream);
+       }
+       else {
+               usbvision_release(usbvision);
+       }
+
+       PDEBUG(DBG_PROBE, "success");
+
+}
+
+static struct usb_driver usbvision_driver = {
+       .name           = "usbvision",
+       .id_table       = usbvision_table,
+       .probe          = usbvision_probe,
+       .disconnect     = usbvision_disconnect
+};
+
+/*
+ * customdevice_process()
+ *
+ * This procedure preprocesses CustomDevice parameter if any
+ *
+ */
+static void customdevice_process(void)
+{
+       usbvision_device_data[0]=usbvision_device_data[1];
+       usbvision_table[0]=usbvision_table[1];
+
+       if(CustomDevice)
+       {
+               char *parse=CustomDevice;
+
+               PDEBUG(DBG_PROBE, "CustomDevide=%s", CustomDevice);
+
+               /*format is CustomDevice="0x0573 0x4D31 0 7113 3 PAL 1 1 1 5 -1 -1 -1 -1 -1"
+               usbvision_device_data[0].idVendor;
+               usbvision_device_data[0].idProduct;
+               usbvision_device_data[0].Interface;
+               usbvision_device_data[0].Codec;
+               usbvision_device_data[0].VideoChannels;
+               usbvision_device_data[0].VideoNorm;
+               usbvision_device_data[0].AudioChannels;
+               usbvision_device_data[0].Radio;
+               usbvision_device_data[0].Tuner;
+               usbvision_device_data[0].TunerType;
+               usbvision_device_data[0].Vin_Reg1;
+               usbvision_device_data[0].Vin_Reg2;
+               usbvision_device_data[0].X_Offset;
+               usbvision_device_data[0].Y_Offset;
+               usbvision_device_data[0].Dvi_yuv;
+               usbvision_device_data[0].ModelString;
+               */
+
+               rmspace(parse);
+               usbvision_device_data[0].ModelString="USBVISION Custom Device";
+
+               parse+=2;
+               sscanf(parse,"%x",&usbvision_device_data[0].idVendor);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "idVendor=0x%.4X", usbvision_device_data[0].idVendor);
+               parse+=2;
+               sscanf(parse,"%x",&usbvision_device_data[0].idProduct);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "idProduct=0x%.4X", usbvision_device_data[0].idProduct);
+               sscanf(parse,"%d",&usbvision_device_data[0].Interface);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "Interface=%d", usbvision_device_data[0].Interface);
+               sscanf(parse,"%d",&usbvision_device_data[0].Codec);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "Codec=%d", usbvision_device_data[0].Codec);
+               sscanf(parse,"%d",&usbvision_device_data[0].VideoChannels);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "VideoChannels=%d", usbvision_device_data[0].VideoChannels);
+
+               switch(*parse)
+               {
+                       case 'P':
+                               PDEBUG(DBG_PROBE, "VideoNorm=PAL");
+                               usbvision_device_data[0].VideoNorm=V4L2_STD_PAL;
+                               break;
+
+                       case 'S':
+                               PDEBUG(DBG_PROBE, "VideoNorm=SECAM");
+                               usbvision_device_data[0].VideoNorm=V4L2_STD_SECAM;
+                               break;
+
+                       case 'N':
+                               PDEBUG(DBG_PROBE, "VideoNorm=NTSC");
+                               usbvision_device_data[0].VideoNorm=V4L2_STD_NTSC;
+                               break;
+
+                       default:
+                               PDEBUG(DBG_PROBE, "VideoNorm=PAL (by default)");
+                               usbvision_device_data[0].VideoNorm=V4L2_STD_PAL;
+                               break;
+               }
+               goto2next(parse);
+
+               sscanf(parse,"%d",&usbvision_device_data[0].AudioChannels);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "AudioChannels=%d", usbvision_device_data[0].AudioChannels);
+               sscanf(parse,"%d",&usbvision_device_data[0].Radio);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "Radio=%d", usbvision_device_data[0].Radio);
+               sscanf(parse,"%d",&usbvision_device_data[0].Tuner);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "Tuner=%d", usbvision_device_data[0].Tuner);
+               sscanf(parse,"%d",&usbvision_device_data[0].TunerType);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "TunerType=%d", usbvision_device_data[0].TunerType);
+               sscanf(parse,"%d",&usbvision_device_data[0].Vin_Reg1);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "Vin_Reg1=%d", usbvision_device_data[0].Vin_Reg1);
+               sscanf(parse,"%d",&usbvision_device_data[0].Vin_Reg2);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "Vin_Reg2=%d", usbvision_device_data[0].Vin_Reg2);
+               sscanf(parse,"%d",&usbvision_device_data[0].X_Offset);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "X_Offset=%d", usbvision_device_data[0].X_Offset);
+               sscanf(parse,"%d",&usbvision_device_data[0].Y_Offset);
+               goto2next(parse);
+               PDEBUG(DBG_PROBE, "Y_Offset=%d", usbvision_device_data[0].Y_Offset);
+               sscanf(parse,"%d",&usbvision_device_data[0].Dvi_yuv);
+               PDEBUG(DBG_PROBE, "Dvi_yuv=%d", usbvision_device_data[0].Dvi_yuv);
+
+               //add to usbvision_table also
+               usbvision_table[0].match_flags=USB_DEVICE_ID_MATCH_DEVICE;
+               usbvision_table[0].idVendor=usbvision_device_data[0].idVendor;
+               usbvision_table[0].idProduct=usbvision_device_data[0].idProduct;
+
+       }
+}
+
+
+
+/*
+ * usbvision_init()
+ *
+ * This code is run to initialize the driver.
+ *
+ */
+static int __init usbvision_init(void)
+{
+       int errCode;
+
+       PDEBUG(DBG_PROBE, "");
+
+       PDEBUG(DBG_IOCTL, "IOCTL   debugging is enabled [video]");
+       PDEBUG(DBG_IO,  "IO      debugging is enabled [video]");
+       PDEBUG(DBG_PROBE, "PROBE   debugging is enabled [video]");
+       PDEBUG(DBG_MMAP, "MMAP    debugging is enabled [video]");
+
+       /* disable planar mode support unless compression enabled */
+       if (isocMode != ISOC_MODE_COMPRESS ) {
+               // FIXME : not the right way to set supported flag
+               usbvision_v4l2_format[6].supported = 0; // V4L2_PIX_FMT_YVU420
+               usbvision_v4l2_format[7].supported = 0; // V4L2_PIX_FMT_YUV422P
+       }
+
+       customdevice_process();
+
+       errCode = usb_register(&usbvision_driver);
+
+       if (errCode == 0) {
+               info(DRIVER_DESC " : " USBVISION_VERSION_STRING);
+               PDEBUG(DBG_PROBE, "success");
+       }
+       return errCode;
+}
+
+static void __exit usbvision_exit(void)
+{
+ PDEBUG(DBG_PROBE, "");
+
+ usb_deregister(&usbvision_driver);
+ PDEBUG(DBG_PROBE, "success");
+}
+
+module_init(usbvision_init);
+module_exit(usbvision_exit);
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */