/*
 * USB USBVISION Video device driver 0.9.10
 *
 *
 *
 * 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/list.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/mm.h>
#include <linux/highmem.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/i2c.h>

#include <media/saa7115.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/tuner.h>

#include <linux/workqueue.h>

#include "usbvision.h"
#include "usbvision-cards.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 10
#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)) \
                        printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
                                __func__, __LINE__ , ## args); \
        }
#else
        #define PDEBUG(level, fmt, args...) do {} while(0)
#endif

#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++;


/* sequential number of usbvision device */
static int usbvision_nr;

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" }
};

/* Function prototypes */
static void usbvision_release(struct usb_usbvision *usbvision);

/* Default initialization of device driver parameters */
/* Set the default format for ISOC endpoint */
static int isocMode = ISOC_MODE_COMPRESS;
/* Set the default Debug Mode of the device driver */
static int video_debug;
/* Set the default device to power on at startup */
static int PowerOnAtOpen = 1;
/* Sequential Number of Video Device */
static int video_nr = -1;
/* Sequential Number of Radio Device */
static int radio_nr = -1;
/* Sequential Number of VBI Device */
static int vbi_nr = -1;

/* Grab parameters for the device driver */

/* 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_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)");


// 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 device *cd)
{
        struct video_device *vdev =
                container_of(cd, struct video_device, dev);
        return video_get_drvdata(vdev);
}

static ssize_t show_version(struct device *cd,
                            struct device_attribute *attr, char *buf)
{
        return sprintf(buf, "%s\n", USBVISION_VERSION_STRING);
}
static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);

static ssize_t show_model(struct device *cd,
                          struct device_attribute *attr, char *buf)
{
        struct video_device *vdev =
                container_of(cd, struct video_device, dev);
        struct usb_usbvision *usbvision = video_get_drvdata(vdev);
        return sprintf(buf, "%s\n",
                       usbvision_device_data[usbvision->DevModel].ModelString);
}
static DEVICE_ATTR(model, S_IRUGO, show_model, NULL);

static ssize_t show_hue(struct device *cd,
                        struct device_attribute *attr, char *buf)
{
        struct video_device *vdev =
                container_of(cd, struct video_device, 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_all(usbvision, core, g_ctrl, &ctrl);
        return sprintf(buf, "%d\n", ctrl.value);
}
static DEVICE_ATTR(hue, S_IRUGO, show_hue, NULL);

static ssize_t show_contrast(struct device *cd,
                             struct device_attribute *attr, char *buf)
{
        struct video_device *vdev =
                container_of(cd, struct video_device, 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_all(usbvision, core, g_ctrl, &ctrl);
        return sprintf(buf, "%d\n", ctrl.value);
}
static DEVICE_ATTR(contrast, S_IRUGO, show_contrast, NULL);

static ssize_t show_brightness(struct device *cd,
                               struct device_attribute *attr, char *buf)
{
        struct video_device *vdev =
                container_of(cd, struct video_device, 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_all(usbvision, core, g_ctrl, &ctrl);
        return sprintf(buf, "%d\n", ctrl.value);
}
static DEVICE_ATTR(brightness, S_IRUGO, show_brightness, NULL);

static ssize_t show_saturation(struct device *cd,
                               struct device_attribute *attr, char *buf)
{
        struct video_device *vdev =
                container_of(cd, struct video_device, 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_all(usbvision, core, g_ctrl, &ctrl);
        return sprintf(buf, "%d\n", ctrl.value);
}
static DEVICE_ATTR(saturation, S_IRUGO, show_saturation, NULL);

static ssize_t show_streaming(struct device *cd,
                              struct device_attribute *attr, char *buf)
{
        struct video_device *vdev =
                container_of(cd, struct video_device, dev);
        struct usb_usbvision *usbvision = video_get_drvdata(vdev);
        return sprintf(buf, "%s\n",
                       YES_NO(usbvision->streaming==Stream_On?1:0));
}
static DEVICE_ATTR(streaming, S_IRUGO, show_streaming, NULL);

static ssize_t show_compression(struct device *cd,
                                struct device_attribute *attr, char *buf)
{
        struct video_device *vdev =
                container_of(cd, struct video_device, dev);
        struct usb_usbvision *usbvision = video_get_drvdata(vdev);
        return sprintf(buf, "%s\n",
                       YES_NO(usbvision->isocMode==ISOC_MODE_COMPRESS));
}
static DEVICE_ATTR(compression, S_IRUGO, show_compression, NULL);

static ssize_t show_device_bridge(struct device *cd,
                                  struct device_attribute *attr, char *buf)
{
        struct video_device *vdev =
                container_of(cd, struct video_device, dev);
        struct usb_usbvision *usbvision = video_get_drvdata(vdev);
        return sprintf(buf, "%d\n", usbvision->bridgeType);
}
static 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 = device_create_file(&vdev->dev, &dev_attr_version);
                if (res<0)
                        break;
                res = device_create_file(&vdev->dev, &dev_attr_model);
                if (res<0)
                        break;
                res = device_create_file(&vdev->dev, &dev_attr_hue);
                if (res<0)
                        break;
                res = device_create_file(&vdev->dev, &dev_attr_contrast);
                if (res<0)
                        break;
                res = device_create_file(&vdev->dev, &dev_attr_brightness);
                if (res<0)
                        break;
                res = device_create_file(&vdev->dev, &dev_attr_saturation);
                if (res<0)
                        break;
                res = device_create_file(&vdev->dev, &dev_attr_streaming);
                if (res<0)
                        break;
                res = device_create_file(&vdev->dev, &dev_attr_compression);
                if (res<0)
                        break;
                res = device_create_file(&vdev->dev, &dev_attr_bridge);
                if (res>=0)
                        return;
        } while (0);

        dev_err(&vdev->dev, "%s error: %d\n", __func__, res);
}

static void usbvision_remove_sysfs(struct video_device *vdev)
{
        if (vdev) {
                device_remove_file(&vdev->dev, &dev_attr_version);
                device_remove_file(&vdev->dev, &dev_attr_model);
                device_remove_file(&vdev->dev, &dev_attr_hue);
                device_remove_file(&vdev->dev, &dev_attr_contrast);
                device_remove_file(&vdev->dev, &dev_attr_brightness);
                device_remove_file(&vdev->dev, &dev_attr_saturation);
                device_remove_file(&vdev->dev, &dev_attr_streaming);
                device_remove_file(&vdev->dev, &dev_attr_compression);
                device_remove_file(&vdev->dev, &dev_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 file *file)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        int errCode = 0;

        PDEBUG(DBG_IO, "open");

        lock_kernel();
        usbvision_reset_powerOffTimer(usbvision);

        if (usbvision->user)
                errCode = -EBUSY;
        else {
                /* Allocate memory for the scratch ring buffer */
                errCode = usbvision_scratch_alloc(usbvision);
                if (isocMode==ISOC_MODE_COMPRESS) {
                        /* Allocate intermediate decompression buffers
                           only if needed */
                        errCode = usbvision_decompress_alloc(usbvision);
                }
                if (errCode) {
                        /* Deallocate all buffers if trouble */
                        usbvision_scratch_free(usbvision);
                        usbvision_decompress_free(usbvision);
                }
        }

        /* If so far no errors then we shall start the camera */
        if (!errCode) {
                mutex_lock(&usbvision->lock);
                if (usbvision->power == 0) {
                        usbvision_power_on(usbvision);
                        usbvision_i2c_register(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 must be initialized before isoc transfer */
                        usbvision_muxsel(usbvision,0);
                        usbvision->user++;
                } else {
                        if (PowerOnAtOpen) {
                                usbvision_i2c_unregister(usbvision);
                                usbvision_power_off(usbvision);
                                usbvision->initialized = 0;
                        }
                }
                mutex_unlock(&usbvision->lock);
        }

        /* prepare queues */
        usbvision_empty_framequeues(usbvision);

        PDEBUG(DBG_IO, "success");
        unlock_kernel();
        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 file *file)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        PDEBUG(DBG_IO, "close");
        mutex_lock(&usbvision->lock);

        usbvision_audio_off(usbvision);
        usbvision_restart_isoc(usbvision);
        usbvision_stop_isoc(usbvision);

        usbvision_decompress_free(usbvision);
        usbvision_frames_free(usbvision);
        usbvision_empty_framequeues(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;
        }

        mutex_unlock(&usbvision->lock);

        if (usbvision->remove_pending) {
                printk(KERN_INFO "%s: Final disconnect\n", __func__);
                usbvision_release(usbvision);
        }

        PDEBUG(DBG_IO, "success");
        return 0;
}


/*
 * usbvision_ioctl()
 *
 * This is part of Video 4 Linux API. The procedure handles ioctl() calls.
 *
 */
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int vidioc_g_register (struct file *file, void *priv,
                                struct v4l2_dbg_register *reg)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        int errCode;

        if (!v4l2_chip_match_host(&reg->match))
                return -EINVAL;
        /* NT100x has a 8-bit register space */
        errCode = usbvision_read_reg(usbvision, reg->reg&0xff);
        if (errCode < 0) {
                dev_err(&usbvision->vdev->dev,
                        "%s: VIDIOC_DBG_G_REGISTER failed: error %d\n",
                                __func__, errCode);
                return errCode;
        }
        reg->val = errCode;
        reg->size = 1;
        return 0;
}

static int vidioc_s_register (struct file *file, void *priv,
                                struct v4l2_dbg_register *reg)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        int errCode;

        if (!v4l2_chip_match_host(&reg->match))
                return -EINVAL;
        /* NT100x has a 8-bit register space */
        errCode = usbvision_write_reg(usbvision, reg->reg&0xff, reg->val);
        if (errCode < 0) {
                dev_err(&usbvision->vdev->dev,
                        "%s: VIDIOC_DBG_S_REGISTER failed: error %d\n",
                                __func__, errCode);
                return errCode;
        }
        return 0;
}
#endif

static int vidioc_querycap (struct file *file, void  *priv,
                                        struct v4l2_capability *vc)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        strlcpy(vc->driver, "USBVision", sizeof(vc->driver));
        strlcpy(vc->card,
                usbvision_device_data[usbvision->DevModel].ModelString,
                sizeof(vc->card));
        usb_make_path(usbvision->dev, vc->bus_info, 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);
        return 0;
}

static int vidioc_enum_input (struct file *file, void *priv,
                                struct v4l2_input *vi)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        int chan;

        if (vi->index >= usbvision->video_inputs)
                return -EINVAL;
        if (usbvision->have_tuner) {
                chan = vi->index;
        } else {
                chan = vi->index + 1; /*skip Television string*/
        }
        /* Determine the requested input characteristics
           specific for each usbvision card model */
        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 = USBVISION_NORMS;
                }
                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;
        }
        return 0;
}

static int vidioc_g_input (struct file *file, void *priv, unsigned int *input)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        *input = usbvision->ctl_input;
        return 0;
}

static int vidioc_s_input (struct file *file, void *priv, unsigned int input)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        if ((input >= usbvision->video_inputs) || (input < 0) )
                return -EINVAL;

        mutex_lock(&usbvision->lock);
        usbvision_muxsel(usbvision, input);
        usbvision_set_input(usbvision);
        usbvision_set_output(usbvision,
                             usbvision->curwidth,
                             usbvision->curheight);
        mutex_unlock(&usbvision->lock);
        return 0;
}

static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *id)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        usbvision->tvnormId=*id;

        mutex_lock(&usbvision->lock);
        call_all(usbvision, core, s_std, usbvision->tvnormId);
        mutex_unlock(&usbvision->lock);
        /* propagate the change to the decoder */
        usbvision_muxsel(usbvision, usbvision->ctl_input);

        return 0;
}

static int vidioc_g_tuner (struct file *file, void *priv,
                                struct v4l2_tuner *vt)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        if (!usbvision->have_tuner || vt->index)        // Only tuner 0
                return -EINVAL;
        if(usbvision->radio) {
                strcpy(vt->name, "Radio");
                vt->type = V4L2_TUNER_RADIO;
        } else {
                strcpy(vt->name, "Television");
        }
        /* Let clients fill in the remainder of this struct */
        call_all(usbvision, tuner, g_tuner, vt);

        return 0;
}

static int vidioc_s_tuner (struct file *file, void *priv,
                                struct v4l2_tuner *vt)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        // Only no or one tuner for now
        if (!usbvision->have_tuner || vt->index)
                return -EINVAL;
        /* let clients handle this */
        call_all(usbvision, tuner, s_tuner, vt);

        return 0;
}

static int vidioc_g_frequency (struct file *file, void *priv,
                                struct v4l2_frequency *freq)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        freq->tuner = 0; // Only one tuner
        if(usbvision->radio) {
                freq->type = V4L2_TUNER_RADIO;
        } else {
                freq->type = V4L2_TUNER_ANALOG_TV;
        }
        freq->frequency = usbvision->freq;

        return 0;
}

static int vidioc_s_frequency (struct file *file, void *priv,
                                struct v4l2_frequency *freq)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        // Only no or one tuner for now
        if (!usbvision->have_tuner || freq->tuner)
                return -EINVAL;

        usbvision->freq = freq->frequency;
        call_all(usbvision, tuner, s_frequency, freq);

        return 0;
}

static int vidioc_g_audio (struct file *file, void *priv, struct v4l2_audio *a)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        if(usbvision->radio) {
                strcpy(a->name,"Radio");
        } else {
                strcpy(a->name, "TV");
        }

        return 0;
}

static int vidioc_s_audio (struct file *file, void *fh,
                          struct v4l2_audio *a)
{
        if(a->index) {
                return -EINVAL;
        }

        return 0;
}

static int vidioc_queryctrl (struct file *file, void *priv,
                            struct v4l2_queryctrl *ctrl)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        call_all(usbvision, core, queryctrl, ctrl);

        if (!ctrl->type)
                return -EINVAL;

        return 0;
}

static int vidioc_g_ctrl (struct file *file, void *priv,
                                struct v4l2_control *ctrl)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        call_all(usbvision, core, g_ctrl, ctrl);

        return 0;
}

static int vidioc_s_ctrl (struct file *file, void *priv,
                                struct v4l2_control *ctrl)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        call_all(usbvision, core, s_ctrl, ctrl);

        return 0;
}

static int vidioc_reqbufs (struct file *file,
                           void *priv, struct v4l2_requestbuffers *vr)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        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->memory != V4L2_MEMORY_MMAP)
                return -EINVAL;

        if(usbvision->streaming == Stream_On) {
                if ((ret = usbvision_stream_interrupt(usbvision)))
                        return ret;
        }

        usbvision_frames_free(usbvision);
        usbvision_empty_framequeues(usbvision);
        vr->count = usbvision_frames_alloc(usbvision,vr->count);

        usbvision->curFrame = NULL;

        return 0;
}

static int vidioc_querybuf (struct file *file,
                            void *priv, struct v4l2_buffer *vb)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        struct usbvision_frame *frame;

        /* FIXME : must control
           that buffers are mapped (VIDIOC_REQBUFS has been called) */
        if(vb->index>=usbvision->num_frames)  {
                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*PAGE_ALIGN(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;
}

static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *vb)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        struct usbvision_frame *frame;
        unsigned long lock_flags;

        /* FIXME : works only on VIDEO_CAPTURE MODE, MMAP. */
        if(vb->index>=usbvision->num_frames)  {
                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);

        return 0;
}

static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *vb)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        int ret;
        struct usbvision_frame *f;
        unsigned long lock_flags;

        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;
}

static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        usbvision->streaming = Stream_On;
        call_all(usbvision, video, s_stream, 1);

        return 0;
}

static int vidioc_streamoff(struct file *file,
                            void *priv, enum v4l2_buf_type type)
{
        struct usb_usbvision *usbvision = video_drvdata(file);

        if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;

        if(usbvision->streaming == Stream_On) {
                usbvision_stream_interrupt(usbvision);
                /* Stop all video streamings */
                call_all(usbvision, video, s_stream, 0);
        }
        usbvision_empty_framequeues(usbvision);

        return 0;
}

static int vidioc_enum_fmt_vid_cap (struct file *file, void  *priv,
                                        struct v4l2_fmtdesc *vfd)
{
        if(vfd->index>=USBVISION_SUPPORTED_PALETTES-1) {
                return -EINVAL;
        }
        strcpy(vfd->description,usbvision_v4l2_format[vfd->index].desc);
        vfd->pixelformat = usbvision_v4l2_format[vfd->index].format;
        return 0;
}

static int vidioc_g_fmt_vid_cap (struct file *file, void *priv,
                                        struct v4l2_format *vf)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        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 */

        return 0;
}

static int vidioc_try_fmt_vid_cap (struct file *file, void *priv,
                               struct v4l2_format *vf)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        int formatIdx;

        /* 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;

        return 0;
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
                               struct v4l2_format *vf)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        int ret;

        if( 0 != (ret=vidioc_try_fmt_vid_cap (file, priv, vf)) ) {
                return ret;
        }

        /* stop io in case it is already in progress */
        if(usbvision->streaming == Stream_On) {
                if ((ret = usbvision_stream_interrupt(usbvision)))
                        return ret;
        }
        usbvision_frames_free(usbvision);
        usbvision_empty_framequeues(usbvision);

        usbvision->curFrame = NULL;

        /* by now we are committed to the new data... */
        mutex_lock(&usbvision->lock);
        usbvision_set_output(usbvision, vf->fmt.pix.width, vf->fmt.pix.height);
        mutex_unlock(&usbvision->lock);

        return 0;
}

static ssize_t usbvision_v4l2_read(struct file *file, char __user *buf,
                      size_t count, loff_t *ppos)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        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", __func__,
               (unsigned long)count, noblock);

        if (!USBVISION_IS_OPERATIONAL(usbvision) || (buf == NULL))
                return -EFAULT;

        /* This entry point is compatible with the mmap routines
           so that a user can do either VIDIOC_QBUF/VIDIOC_DQBUF
           to get frames or call read on the device. */
        if(!usbvision->num_frames) {
                /* First, allocate some frames to work with
                   if this has not been done with VIDIOC_REQBUF */
                usbvision_frames_free(usbvision);
                usbvision_empty_framequeues(usbvision);
                usbvision_frames_alloc(usbvision,USBVISION_NUMFRAMES);
        }

        if(usbvision->streaming != Stream_On) {
                /* no stream is running, make it running ! */
                usbvision->streaming = Stream_On;
                call_all(usbvision, video, s_stream, 1);
        }

        /* Then, enqueue as many frames as possible
           (like a user of VIDIOC_QBUF would do) */
        for(i=0;i<usbvision->num_frames;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;
                        /* Accumulated in usbvision_parse_data() */
                        frame->scanlength = 0;

                        /* 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",
               __func__,
               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",
               __func__,
               (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 usb_usbvision *usbvision = video_drvdata(file);

        PDEBUG(DBG_MMAP, "mmap");

        mutex_lock(&usbvision->lock);

        if (!USBVISION_IS_OPERATIONAL(usbvision)) {
                mutex_unlock(&usbvision->lock);
                return -EFAULT;
        }

        if (!(vma->vm_flags & VM_WRITE) ||
            size != PAGE_ALIGN(usbvision->max_frame_size)) {
                mutex_unlock(&usbvision->lock);
                return -EINVAL;
        }

        for (i = 0; i < usbvision->num_frames; i++) {
                if (((PAGE_ALIGN(usbvision->max_frame_size)*i) >> PAGE_SHIFT) ==
                    vma->vm_pgoff)
                        break;
        }
        if (i == usbvision->num_frames) {
                PDEBUG(DBG_MMAP,
                       "mmap: user supplied mapping address is out of range");
                mutex_unlock(&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");
                        mutex_unlock(&usbvision->lock);
                        return -EAGAIN;
                }
                start += PAGE_SIZE;
                pos += PAGE_SIZE;
                size -= PAGE_SIZE;
        }

        mutex_unlock(&usbvision->lock);
        return 0;
}


/*
 * Here comes the stuff for radio on usbvision based devices
 *
 */
static int usbvision_radio_open(struct file *file)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        int errCode = 0;

        PDEBUG(DBG_IO, "%s:", __func__);

        mutex_lock(&usbvision->lock);

        if (usbvision->user) {
                dev_err(&usbvision->rdev->dev,
                        "%s: Someone tried to open an already opened USBVision Radio!\n",
                                __func__);
                errCode = -EBUSY;
        }
        else {
                if(PowerOnAtOpen) {
                        usbvision_reset_powerOffTimer(usbvision);
                        if (usbvision->power == 0) {
                                usbvision_power_on(usbvision);
                                usbvision_i2c_register(usbvision);
                        }
                }

                /* Alternate interface 1 is is the biggest frame size */
                errCode = usbvision_set_alternate(usbvision);
                if (errCode < 0) {
                        usbvision->last_error = errCode;
                        errCode = -EBUSY;
                        goto out;
                }

                // If so far no errors then we shall start the radio
                usbvision->radio = 1;
                call_all(usbvision, tuner, s_radio);
                usbvision_set_audio(usbvision, USBVISION_AUDIO_RADIO);
                usbvision->user++;
        }

        if (errCode) {
                if (PowerOnAtOpen) {
                        usbvision_i2c_unregister(usbvision);
                        usbvision_power_off(usbvision);
                        usbvision->initialized = 0;
                }
        }
out:
        mutex_unlock(&usbvision->lock);
        return errCode;
}


static int usbvision_radio_close(struct file *file)
{
        struct usb_usbvision *usbvision = video_drvdata(file);
        int errCode = 0;

        PDEBUG(DBG_IO, "");

        mutex_lock(&usbvision->lock);

        /* Set packet size to 0 */
        usbvision->ifaceAlt=0;
        errCode = usb_set_interface(usbvision->dev, usbvision->iface,
                                    usbvision->ifaceAlt);

        usbvision_audio_off(usbvision);
        usbvision->radio=0;
        usbvision->user--;

        if (PowerOnAtOpen) {
                usbvision_set_powerOffTimer(usbvision);
                usbvision->initialized = 0;
        }

        mutex_unlock(&usbvision->lock);

        if (usbvision->remove_pending) {
                printk(KERN_INFO "%s: Final disconnect\n", __func__);
                usbvision_release(usbvision);
        }

        PDEBUG(DBG_IO, "success");
        return errCode;
}

/*
 * Here comes the stuff for vbi on usbvision based devices
 *
 */
static int usbvision_vbi_open(struct file *file)
{
        /* TODO */
        return -ENODEV;
}

static int usbvision_vbi_close(struct file *file)
{
        /* TODO */
        return -ENODEV;
}

static long usbvision_do_vbi_ioctl(struct file *file,
                                 unsigned int cmd, void *arg)
{
        /* TODO */
        return -ENOIOCTLCMD;
}

static long usbvision_vbi_ioctl(struct file *file,
                       unsigned int cmd, unsigned long arg)
{
        return video_usercopy(file, cmd, arg, usbvision_do_vbi_ioctl);
}


//
// Video registration stuff
//

// Video template
static const struct v4l2_file_operations usbvision_fops = {
        .owner             = THIS_MODULE,
        .open           = usbvision_v4l2_open,
        .release        = usbvision_v4l2_close,
        .read           = usbvision_v4l2_read,
        .mmap           = usbvision_v4l2_mmap,
        .ioctl          = video_ioctl2,
/*      .poll          = video_poll, */
};

static const struct v4l2_ioctl_ops usbvision_ioctl_ops = {
        .vidioc_querycap      = vidioc_querycap,
        .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
        .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
        .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
        .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
        .vidioc_reqbufs       = vidioc_reqbufs,
        .vidioc_querybuf      = vidioc_querybuf,
        .vidioc_qbuf          = vidioc_qbuf,
        .vidioc_dqbuf         = vidioc_dqbuf,
        .vidioc_s_std         = vidioc_s_std,
        .vidioc_enum_input    = vidioc_enum_input,
        .vidioc_g_input       = vidioc_g_input,
        .vidioc_s_input       = vidioc_s_input,
        .vidioc_queryctrl     = vidioc_queryctrl,
        .vidioc_g_audio       = vidioc_g_audio,
        .vidioc_s_audio       = vidioc_s_audio,
        .vidioc_g_ctrl        = vidioc_g_ctrl,
        .vidioc_s_ctrl        = vidioc_s_ctrl,
        .vidioc_streamon      = vidioc_streamon,
        .vidioc_streamoff     = vidioc_streamoff,
#ifdef CONFIG_VIDEO_V4L1_COMPAT
/*      .vidiocgmbuf          = vidiocgmbuf, */
#endif
        .vidioc_g_tuner       = vidioc_g_tuner,
        .vidioc_s_tuner       = vidioc_s_tuner,
        .vidioc_g_frequency   = vidioc_g_frequency,
        .vidioc_s_frequency   = vidioc_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
        .vidioc_g_register    = vidioc_g_register,
        .vidioc_s_register    = vidioc_s_register,
#endif
};

static struct video_device usbvision_video_template = {
        .fops           = &usbvision_fops,
        .ioctl_ops      = &usbvision_ioctl_ops,
        .name           = "usbvision-video",
        .release        = video_device_release,
        .minor          = -1,
        .tvnorms              = USBVISION_NORMS,
        .current_norm         = V4L2_STD_PAL
};


// Radio template
static const struct v4l2_file_operations usbvision_radio_fops = {
        .owner             = THIS_MODULE,
        .open           = usbvision_radio_open,
        .release        = usbvision_radio_close,
        .ioctl          = video_ioctl2,
};

static const struct v4l2_ioctl_ops usbvision_radio_ioctl_ops = {
        .vidioc_querycap      = vidioc_querycap,
        .vidioc_enum_input    = vidioc_enum_input,
        .vidioc_g_input       = vidioc_g_input,
        .vidioc_s_input       = vidioc_s_input,
        .vidioc_queryctrl     = vidioc_queryctrl,
        .vidioc_g_audio       = vidioc_g_audio,
        .vidioc_s_audio       = vidioc_s_audio,
        .vidioc_g_ctrl        = vidioc_g_ctrl,
        .vidioc_s_ctrl        = vidioc_s_ctrl,
        .vidioc_g_tuner       = vidioc_g_tuner,
        .vidioc_s_tuner       = vidioc_s_tuner,
        .vidioc_g_frequency   = vidioc_g_frequency,
        .vidioc_s_frequency   = vidioc_s_frequency,
};

static struct video_device usbvision_radio_template = {
        .fops           = &usbvision_radio_fops,
        .name           = "usbvision-radio",
        .release        = video_device_release,
        .minor          = -1,
        .ioctl_ops      = &usbvision_radio_ioctl_ops,

        .tvnorms              = USBVISION_NORMS,
        .current_norm         = V4L2_STD_PAL
};

// vbi template
static const struct v4l2_file_operations usbvision_vbi_fops = {
        .owner             = THIS_MODULE,
        .open           = usbvision_vbi_open,
        .release        = usbvision_vbi_close,
        .ioctl          = usbvision_vbi_ioctl,
};

static struct video_device usbvision_vbi_template=
{
        .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) {
                dev_err(&usbvision->dev->dev,
                        "%s: usbvision->dev is not set\n", __func__);
                return NULL;
        }

        vdev = video_device_alloc();
        if (NULL == vdev) {
                return NULL;
        }
        *vdev = *vdev_template;
//      vdev->minor   = -1;
        vdev->v4l2_dev = &usbvision->v4l2_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->num);
                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->num);
                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->num);
                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;
        }
        printk(KERN_INFO "USBVision[%d]: registered USBVision Video device /dev/video%d [v4l2]\n",
               usbvision->nr, usbvision->vdev->num);

        // 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;
                }
                printk(KERN_INFO "USBVision[%d]: registered USBVision Radio device /dev/radio%d [v4l2]\n",
                       usbvision->nr, usbvision->rdev->num);
        }
        // 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;
                }
                printk(KERN_INFO "USBVision[%d]: registered USBVision VBI device /dev/vbi%d [v4l2] (Not Working Yet!)\n",
                       usbvision->nr, usbvision->vbi->num);
        }
        // all done
        return 0;

 err_exit:
        dev_err(&usbvision->dev->dev,
                "USBVision[%d]: video_register_device() failed\n",
                        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_interface *intf)
{
        struct usb_usbvision *usbvision;

        usbvision = kzalloc(sizeof(struct usb_usbvision), GFP_KERNEL);
        if (usbvision == NULL)
                return NULL;

        usbvision->dev = dev;
        if (v4l2_device_register(&intf->dev, &usbvision->v4l2_dev))
                goto err_free;

        mutex_init(&usbvision->lock);   /* 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_unreg;
        init_waitqueue_head(&usbvision->ctrlUrb_wq);

        usbvision_init_powerOffTimer(usbvision);

        return usbvision;

err_unreg:
        v4l2_device_unregister(&usbvision->v4l2_dev);
err_free:
        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, "");

        mutex_lock(&usbvision->lock);

        usbvision_reset_powerOffTimer(usbvision);

        usbvision->initialized = 0;

        mutex_unlock(&usbvision->lock);

        usbvision_remove_sysfs(usbvision->vdev);
        usbvision_unregister_video(usbvision);

        if (usbvision->ctrlUrb) {
                usb_free_urb(usbvision->ctrlUrb);
        }

        v4l2_device_unregister(&usbvision->v4l2_dev);
        kfree(usbvision);

        PDEBUG(DBG_PROBE, "success");
}


/*********************** usb interface **********************************/

static void usbvision_configure_video(struct usb_usbvision *usbvision)
{
        int model;

        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_override) {
                usbvision->Vin_Reg2_Preset =
                        usbvision_device_data[usbvision->DevModel].Vin_Reg2;
        } else {
                usbvision->Vin_Reg2_Preset = 0;
        }

        usbvision->tvnormId = usbvision_device_data[model].VideoNorm;

        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 */
        /* first switch off audio */
        usbvision_audio_off(usbvision);
        if (!PowerOnAtOpen) {
                /* and then power up the noisy tuner */
                usbvision_power_on(usbvision);
                usbvision_i2c_register(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 = usb_get_dev(interface_to_usbdev(intf));
        struct usb_interface *uif;
        __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,i;

        PDEBUG(DBG_PROBE, "VID=%#04x, PID=%#04x, ifnum=%u",
                                dev->descriptor.idVendor,
                                dev->descriptor.idProduct, ifnum);

        model = devid->driver_info;
        if ( (model<0) || (model>=usbvision_device_data_size) ) {
                PDEBUG(DBG_PROBE, "model out of bounds %d",model);
                return -ENODEV;
        }
        printk(KERN_INFO "%s: %s found\n", __func__,
                                usbvision_device_data[model].ModelString);

        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 (!usb_endpoint_xfer_isoc(endpoint)) {
                dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
                    __func__, ifnum);
                dev_err(&intf->dev, "%s: Endpoint attributes %d",
                    __func__, endpoint->bmAttributes);
                return -ENODEV;
        }
        if (usb_endpoint_dir_out(endpoint)) {
                dev_err(&intf->dev, "%s: interface %d. has ISO OUT endpoint!\n",
                    __func__, ifnum);
                return -ENODEV;
        }

        usbvision = usbvision_alloc(dev, intf);
        if (usbvision == NULL) {
                dev_err(&intf->dev, "%s: couldn't allocate USBVision struct\n", __func__);
                return -ENOMEM;
        }

        if (dev->descriptor.bNumConfigurations > 1) {
                usbvision->bridgeType = BRIDGE_NT1004;
        } else if (model == DAZZLE_DVC_90_REV_1_SECAM) {
                usbvision->bridgeType = BRIDGE_NT1005;
        } else {
                usbvision->bridgeType = BRIDGE_NT1003;
        }
        PDEBUG(DBG_PROBE, "bridgeType %d", usbvision->bridgeType);

        mutex_lock(&usbvision->lock);

        /* compute alternate max packet sizes */
        uif = dev->actconfig->interface[0];

        usbvision->num_alt=uif->num_altsetting;
        PDEBUG(DBG_PROBE, "Alternate settings: %i",usbvision->num_alt);
        usbvision->alt_max_pkt_size = kmalloc(32*
                                              usbvision->num_alt,GFP_KERNEL);
        if (usbvision->alt_max_pkt_size == NULL) {
                dev_err(&intf->dev, "usbvision: out of memory!\n");
                mutex_unlock(&usbvision->lock);
                return -ENOMEM;
        }

        for (i = 0; i < usbvision->num_alt ; i++) {
                u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
                                      wMaxPacketSize);
                usbvision->alt_max_pkt_size[i] =
                        (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
                PDEBUG(DBG_PROBE, "Alternate setting %i, max size= %i",i,
                       usbvision->alt_max_pkt_size[i]);
        }


        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->DevModel = model;
        usbvision->remove_pending = 0;
        usbvision->iface = ifnum;
        usbvision->ifaceAlt = 0;
        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);
        mutex_unlock(&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) {
                dev_err(&usbvision->dev->dev,
                        "%s: usb_get_intfdata() failed\n", __func__);
                return;
        }
        usb_set_intfdata (intf, NULL);

        mutex_lock(&usbvision->lock);

        // At this time we ask to cancel outstanding URBs
        usbvision_stop_isoc(usbvision);

        v4l2_device_disconnect(&usbvision->v4l2_dev);

        if (usbvision->power) {
                usbvision_i2c_unregister(usbvision);
                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

        mutex_unlock(&usbvision->lock);

        if (usbvision->user) {
                printk(KERN_INFO "%s: In use, disconnect pending\n",
                       __func__);
                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     = __devexit_p(usbvision_disconnect),
};

/*
 * usbvision_init()
 *
 * This code is run to initialize the driver.
 *
 */
static int __init usbvision_init(void)
{
        int errCode;

        PDEBUG(DBG_PROBE, "");

        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
        }

        errCode = usb_register(&usbvision_driver);

        if (errCode == 0) {
                printk(KERN_INFO DRIVER_DESC " : " USBVISION_VERSION_STRING "\n");
                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:
 */