V4L/DVB (3599a): Move drivers/usb/media to drivers/media/video

Because of historic reasons, there are two separate directories with
V4L stuff. Most drivers are located at driver/media/video. However, some
code for USB Webcams were inserted under drivers/usb/media.

This makes difficult for module authors to know were things should be.
Also, makes Kconfig menu confusing for normal users.

This patch moves all V4L content under drivers/usb/media to
drivers/media/video, and fixes Kconfig/Makefile entries.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 1435 insertions, 0 deletions

diff --git a/drivers/media/video/se401.c b/drivers/media/video/se401.c
new file mode 100644
index 000000000000..f03ea7f89596
--- /dev/null
+++ b/drivers/media/video/se401.c
@@ -0,0 +1,1435 @@
+/*
+ * Endpoints (formerly known as AOX) se401 USB Camera Driver
+ *
+ * Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org)
+ *
+ * Still somewhat based on the Linux ov511 driver.
+ * 
+ * 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.
+ *
+ *
+ * Thanks to Endpoints Inc. (www.endpoints.com) for making documentation on
+ * their chipset available and supporting me while writing this driver.
+ *      - Jeroen Vreeken
+ */
+
+static const char version[] = "0.24";
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/usb.h>
+#include "se401.h"
+
+static int flickerless=0;
+static int video_nr = -1;
+
+static struct usb_device_id device_table [] = {
+        { USB_DEVICE(0x03e8, 0x0004) },/* Endpoints/Aox SE401 */
+        { USB_DEVICE(0x0471, 0x030b) },/* Philips PCVC665K */
+        { USB_DEVICE(0x047d, 0x5001) },/* Kensington 67014 */
+        { USB_DEVICE(0x047d, 0x5002) },/* Kensington 6701(5/7) */
+        { USB_DEVICE(0x047d, 0x5003) },/* Kensington 67016 */
+        { }
+};
+
+MODULE_DEVICE_TABLE(usb, device_table);
+
+MODULE_AUTHOR("Jeroen Vreeken <pe1rxq@amsat.org>");
+MODULE_DESCRIPTION("SE401 USB Camera Driver");
+MODULE_LICENSE("GPL");
+module_param(flickerless, int, 0);
+MODULE_PARM_DESC(flickerless, "Net frequency to adjust exposure time to (0/50/60)");
+module_param(video_nr, int, 0);
+
+static struct usb_driver se401_driver;
+
+
+/**********************************************************************
+ *
+ * Memory management
+ *
+ **********************************************************************/
+static void *rvmalloc(unsigned long size)
+{
+        void *mem;
+        unsigned long adr;
+
+        size = PAGE_ALIGN(size);
+        mem = vmalloc_32(size);
+        if (!mem)
+                return NULL;
+
+        memset(mem, 0, size); /* Clear the ram out, no junk to the user */
+        adr = (unsigned long) mem;
+        while (size > 0) {
+                SetPageReserved(vmalloc_to_page((void *)adr));
+                adr += PAGE_SIZE;
+                size -= PAGE_SIZE;
+        }
+
+        return mem;
+}
+
+static void rvfree(void *mem, unsigned long size)
+{
+        unsigned long adr;
+
+        if (!mem)
+                return;
+
+        adr = (unsigned long) mem;
+        while ((long) size > 0) {
+                ClearPageReserved(vmalloc_to_page((void *)adr));
+                adr += PAGE_SIZE;
+                size -= PAGE_SIZE;
+        }
+        vfree(mem);
+}
+
+
+
+/****************************************************************************
+ *
+ * se401 register read/write functions
+ *
+ ***************************************************************************/
+
+static int se401_sndctrl(int set, struct usb_se401 *se401, unsigned short req,
+                         unsigned short value, unsigned char *cp, int size)
+{
+        return usb_control_msg (
+                se401->dev,
+                set ? usb_sndctrlpipe(se401->dev, 0) : usb_rcvctrlpipe(se401->dev, 0),
+                req,
+                (set ? USB_DIR_OUT : USB_DIR_IN) | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+                value,
+                0,
+                cp,
+                size,
+                1000
+        );
+}
+
+static int se401_set_feature(struct usb_se401 *se401, unsigned short selector,
+                             unsigned short param)
+{
+        /* specs say that the selector (address) should go in the value field
+           and the param in index, but in the logs of the windows driver they do
+           this the other way around...
+         */
+        return usb_control_msg (
+                se401->dev,
+                usb_sndctrlpipe(se401->dev, 0),
+                SE401_REQ_SET_EXT_FEATURE,
+                USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+                param,
+                selector,
+                NULL,
+                0,
+                1000
+        );
+}
+
+static unsigned short se401_get_feature(struct usb_se401 *se401, 
+                                        unsigned short selector)
+{
+        /* For 'set' the selecetor should be in index, not sure if the spec is
+           wrong here to....
+         */
+        unsigned char cp[2];
+        usb_control_msg (
+                se401->dev,
+                usb_rcvctrlpipe(se401->dev, 0),
+                SE401_REQ_GET_EXT_FEATURE,
+                USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+                0,
+                selector,
+                cp,
+                2,
+                1000
+        );
+        return cp[0]+cp[1]*256;
+}
+
+/****************************************************************************
+ *
+ * Camera control
+ *
+ ***************************************************************************/
+
+
+static int se401_send_pict(struct usb_se401 *se401)
+{
+        se401_set_feature(se401, HV7131_REG_TITL, se401->expose_l);/* integration time low */
+        se401_set_feature(se401, HV7131_REG_TITM, se401->expose_m);/* integration time mid */
+        se401_set_feature(se401, HV7131_REG_TITU, se401->expose_h);/* integration time mid */
+        se401_set_feature(se401, HV7131_REG_ARLV, se401->resetlevel);/* reset level value */
+        se401_set_feature(se401, HV7131_REG_ARCG, se401->rgain);/* red color gain */
+        se401_set_feature(se401, HV7131_REG_AGCG, se401->ggain);/* green color gain */
+        se401_set_feature(se401, HV7131_REG_ABCG, se401->bgain);/* blue color gain */
+                
+        return 0;
+}
+
+static void se401_set_exposure(struct usb_se401 *se401, int brightness)
+{
+        int integration=brightness<<5;
+        
+        if (flickerless==50) {
+                integration=integration-integration%106667;
+        }
+        if (flickerless==60) {
+                integration=integration-integration%88889;
+        }
+        se401->brightness=integration>>5;
+        se401->expose_h=(integration>>16)&0xff;
+        se401->expose_m=(integration>>8)&0xff;
+        se401->expose_l=integration&0xff;
+}
+
+static int se401_get_pict(struct usb_se401 *se401, struct video_picture *p)
+{
+        p->brightness=se401->brightness;
+        if (se401->enhance) {
+                p->whiteness=32768;
+        } else {
+                p->whiteness=0;
+        }
+        p->colour=65535;
+        p->contrast=65535;
+        p->hue=se401->rgain<<10;
+        p->palette=se401->palette;
+        p->depth=3; /* rgb24 */
+        return 0;
+}
+
+
+static int se401_set_pict(struct usb_se401 *se401, struct video_picture *p)
+{
+        if (p->palette != VIDEO_PALETTE_RGB24)
+                return 1;
+        se401->palette=p->palette;
+        if (p->hue!=se401->hue) {
+                se401->rgain= p->hue>>10;
+                se401->bgain= 0x40-(p->hue>>10);
+                se401->hue=p->hue;
+        }
+        if (p->brightness!=se401->brightness) {
+                se401_set_exposure(se401, p->brightness);
+        }
+        if (p->whiteness>=32768) {
+                se401->enhance=1;
+        } else {
+                se401->enhance=0;
+        }
+        se401_send_pict(se401);
+        se401_send_pict(se401);
+        return 0;
+}
+
+/*
+        Hyundai have some really nice docs about this and other sensor related
+        stuff on their homepage: www.hei.co.kr
+*/
+static void se401_auto_resetlevel(struct usb_se401 *se401)
+{
+        unsigned int ahrc, alrc;
+        int oldreset=se401->resetlevel;
+
+        /* For some reason this normally read-only register doesn't get reset
+           to zero after reading them just once...
+         */
+        se401_get_feature(se401, HV7131_REG_HIREFNOH); 
+        se401_get_feature(se401, HV7131_REG_HIREFNOL);
+        se401_get_feature(se401, HV7131_REG_LOREFNOH);
+        se401_get_feature(se401, HV7131_REG_LOREFNOL);
+        ahrc=256*se401_get_feature(se401, HV7131_REG_HIREFNOH) + 
+            se401_get_feature(se401, HV7131_REG_HIREFNOL);
+        alrc=256*se401_get_feature(se401, HV7131_REG_LOREFNOH) +
+            se401_get_feature(se401, HV7131_REG_LOREFNOL);
+
+        /* Not an exact science, but it seems to work pretty well... */
+        if (alrc > 10) {
+                while (alrc>=10 && se401->resetlevel < 63) {
+                        se401->resetlevel++;
+                        alrc /=2;
+                }
+        } else if (ahrc > 20) {
+                while (ahrc>=20 && se401->resetlevel > 0) {
+                        se401->resetlevel--;
+                        ahrc /=2;
+                }
+        }
+        if (se401->resetlevel!=oldreset)
+                se401_set_feature(se401, HV7131_REG_ARLV, se401->resetlevel);
+
+        return;
+}
+
+/* irq handler for snapshot button */
+static void se401_button_irq(struct urb *urb, struct pt_regs *regs)
+{
+        struct usb_se401 *se401 = urb->context;
+        int status;
+        
+        if (!se401->dev) {
+                info("ohoh: device vapourished");
+                return;
+        }
+        
+        switch (urb->status) {
+        case 0:
+                /* success */
+                break;
+        case -ECONNRESET:
+        case -ENOENT:
+        case -ESHUTDOWN:
+                /* this urb is terminated, clean up */
+                dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
+                return;
+        default:
+                dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
+                goto exit;
+        }
+
+        if (urb->actual_length >=2) {
+                if (se401->button)
+                        se401->buttonpressed=1;
+        }
+exit:
+        status = usb_submit_urb (urb, GFP_ATOMIC);
+        if (status)
+                err ("%s - usb_submit_urb failed with result %d",
+                     __FUNCTION__, status);
+}
+
+static void se401_video_irq(struct urb *urb, struct pt_regs *regs)
+{
+        struct usb_se401 *se401 = urb->context;
+        int length = urb->actual_length;
+
+        /* ohoh... */
+        if (!se401->streaming)
+                return;
+
+        if (!se401->dev) {
+                info ("ohoh: device vapourished");
+                return;
+        }
+
+        /* 0 sized packets happen if we are to fast, but sometimes the camera
+           keeps sending them forever...
+         */
+        if (length && !urb->status) {
+                se401->nullpackets=0;
+                switch(se401->scratch[se401->scratch_next].state) {
+                        case BUFFER_READY:
+                        case BUFFER_BUSY: {
+                                se401->dropped++;
+                                break;
+                        }
+                        case BUFFER_UNUSED: {
+                                memcpy(se401->scratch[se401->scratch_next].data, (unsigned char *)urb->transfer_buffer, length);
+                                se401->scratch[se401->scratch_next].state=BUFFER_READY;
+                                se401->scratch[se401->scratch_next].offset=se401->bayeroffset;
+                                se401->scratch[se401->scratch_next].length=length;
+                                if (waitqueue_active(&se401->wq)) {
+                                        wake_up_interruptible(&se401->wq);
+                                }
+                                se401->scratch_overflow=0;
+                                se401->scratch_next++;
+                                if (se401->scratch_next>=SE401_NUMSCRATCH)
+                                        se401->scratch_next=0;
+                                break;
+                        }
+                }
+                se401->bayeroffset+=length;
+                if (se401->bayeroffset>=se401->cheight*se401->cwidth) {
+                        se401->bayeroffset=0;
+                }
+        } else {
+                se401->nullpackets++;
+                if (se401->nullpackets > SE401_MAX_NULLPACKETS) {
+                        if (waitqueue_active(&se401->wq)) {
+                                wake_up_interruptible(&se401->wq);
+                        }               
+                }
+        }
+
+        /* Resubmit urb for new data */
+        urb->status=0;
+        urb->dev=se401->dev;
+        if(usb_submit_urb(urb, GFP_KERNEL))
+                info("urb burned down");
+        return;
+}
+
+static void se401_send_size(struct usb_se401 *se401, int width, int height)
+{
+        int i=0;
+        int mode=0x03; /* No compression */
+        int sendheight=height;
+        int sendwidth=width;
+
+        /* JangGu compression can only be used with the camera supported sizes,
+           but bayer seems to work with any size that fits on the sensor.
+           We check if we can use compression with the current size with either
+           4 or 16 times subcapturing, if not we use uncompressed bayer data
+           but this will result in cutouts of the maximum size....
+         */
+        while (i<se401->sizes && !(se401->width[i]==width && se401->height[i]==height))
+                i++;
+        while (i<se401->sizes) {
+                if (se401->width[i]==width*2 && se401->height[i]==height*2) {
+                        sendheight=se401->height[i];
+                        sendwidth=se401->width[i];
+                        mode=0x40;
+                }
+                if (se401->width[i]==width*4 && se401->height[i]==height*4) {
+                        sendheight=se401->height[i];
+                        sendwidth=se401->width[i];
+                        mode=0x42;
+                }
+                i++;
+        }
+
+        se401_sndctrl(1, se401, SE401_REQ_SET_WIDTH, sendwidth, NULL, 0);
+        se401_sndctrl(1, se401, SE401_REQ_SET_HEIGHT, sendheight, NULL, 0);
+        se401_set_feature(se401, SE401_OPERATINGMODE, mode);
+
+        if (mode==0x03) {
+                se401->format=FMT_BAYER;
+        } else {
+                se401->format=FMT_JANGGU;
+        }
+
+        return;
+}
+
+/*
+        In this function se401_send_pict is called several times,
+        for some reason (depending on the state of the sensor and the phase of
+        the moon :) doing this only in either place doesn't always work...
+*/
+static int se401_start_stream(struct usb_se401 *se401)
+{
+        struct urb *urb;
+        int err=0, i;
+        se401->streaming=1;
+
+        se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 1, NULL, 0);
+        se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 1, NULL, 0);
+
+        /* Set picture settings */
+        se401_set_feature(se401, HV7131_REG_MODE_B, 0x05);/*windowed + pix intg */
+        se401_send_pict(se401);
+
+        se401_send_size(se401, se401->cwidth, se401->cheight);
+
+        se401_sndctrl(1, se401, SE401_REQ_START_CONTINUOUS_CAPTURE, 0, NULL, 0);
+
+        /* Do some memory allocation */
+        for (i=0; i<SE401_NUMFRAMES; i++) {
+                se401->frame[i].data=se401->fbuf + i * se401->maxframesize;
+                se401->frame[i].curpix=0;
+        }
+        for (i=0; i<SE401_NUMSBUF; i++) {
+                se401->sbuf[i].data=kmalloc(SE401_PACKETSIZE, GFP_KERNEL);
+        }
+
+        se401->bayeroffset=0;
+        se401->scratch_next=0;
+        se401->scratch_use=0;
+        se401->scratch_overflow=0;
+        for (i=0; i<SE401_NUMSCRATCH; i++) {
+                se401->scratch[i].data=kmalloc(SE401_PACKETSIZE, GFP_KERNEL);
+                se401->scratch[i].state=BUFFER_UNUSED;
+        }
+
+        for (i=0; i<SE401_NUMSBUF; i++) {
+                urb=usb_alloc_urb(0, GFP_KERNEL);
+                if(!urb)
+                        return -ENOMEM;
+
+                usb_fill_bulk_urb(urb, se401->dev,
+                        usb_rcvbulkpipe(se401->dev, SE401_VIDEO_ENDPOINT),
+                        se401->sbuf[i].data, SE401_PACKETSIZE,
+                        se401_video_irq,
+                        se401);
+
+                se401->urb[i]=urb;
+
+                err=usb_submit_urb(se401->urb[i], GFP_KERNEL);
+                if(err)
+                        err("urb burned down");
+        }
+
+        se401->framecount=0;
+
+        return 0;
+}
+
+static int se401_stop_stream(struct usb_se401 *se401)
+{
+        int i;
+
+        if (!se401->streaming || !se401->dev)
+                return 1;
+
+        se401->streaming=0;
+
+        se401_sndctrl(1, se401, SE401_REQ_STOP_CONTINUOUS_CAPTURE, 0, NULL, 0);
+
+        se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 0, NULL, 0);
+        se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 0, NULL, 0);
+
+        for (i=0; i<SE401_NUMSBUF; i++) if (se401->urb[i]) {
+                usb_kill_urb(se401->urb[i]);
+                usb_free_urb(se401->urb[i]);
+                se401->urb[i]=NULL;
+                kfree(se401->sbuf[i].data);
+        }
+        for (i=0; i<SE401_NUMSCRATCH; i++) {
+                kfree(se401->scratch[i].data);
+                se401->scratch[i].data=NULL;
+        }
+
+        return 0;
+}
+
+static int se401_set_size(struct usb_se401 *se401, int width, int height)
+{
+        int wasstreaming=se401->streaming;
+        /* Check to see if we need to change */
+        if (se401->cwidth==width && se401->cheight==height)
+                return 0;
+
+        /* Check for a valid mode */
+        if (!width || !height)
+                return 1;
+        if ((width & 1) || (height & 1))
+                return 1;
+        if (width>se401->width[se401->sizes-1])
+                return 1;
+        if (height>se401->height[se401->sizes-1])
+                return 1;
+
+        /* Stop a current stream and start it again at the new size */
+        if (wasstreaming)
+                se401_stop_stream(se401);
+        se401->cwidth=width;
+        se401->cheight=height;
+        if (wasstreaming)
+                se401_start_stream(se401);
+        return 0;
+}
+
+
+/****************************************************************************
+ *
+ * Video Decoding
+ *
+ ***************************************************************************/
+
+/*
+        This shouldn't really be done in a v4l driver....
+        But it does make the image look a lot more usable.
+        Basically it lifts the dark pixels more than the light pixels.
+*/
+static inline void enhance_picture(unsigned char *frame, int len)
+{
+        while (len--) {
+                *frame=(((*frame^255)*(*frame^255))/255)^255;
+                frame++;
+        }
+}
+
+static inline void decode_JangGu_integrate(struct usb_se401 *se401, int data)
+{
+        struct se401_frame *frame=&se401->frame[se401->curframe];
+        int linelength=se401->cwidth*3;
+
+        if (frame->curlinepix >= linelength) {
+                frame->curlinepix=0;
+                frame->curline+=linelength;
+        }
+
+        /* First three are absolute, all others relative.
+         * Format is rgb from right to left (mirrorred image), 
+         * we flip it to get bgr from left to right. */
+        if (frame->curlinepix < 3) {
+                *(frame->curline-frame->curlinepix)=1+data*4;
+        } else {
+                *(frame->curline-frame->curlinepix)=
+                    *(frame->curline-frame->curlinepix+3)+data*4;
+        }
+        frame->curlinepix++;
+}
+
+static inline void decode_JangGu_vlc (struct usb_se401 *se401, unsigned char *data, int bit_exp, int packetlength)
+{
+        int pos=0;
+        int vlc_cod=0;
+        int vlc_size=0;
+        int vlc_data=0;
+        int bit_cur;
+        int bit;
+        data+=4;
+        while (pos < packetlength) {
+                bit_cur=8;
+                while (bit_cur && bit_exp) {
+                        bit=((*data)>>(bit_cur-1))&1;
+                        if (!vlc_cod) {
+                                if (bit) {
+                                        vlc_size++;
+                                } else {
+                                        if (!vlc_size) {
+                                                decode_JangGu_integrate(se401, 0);
+                                        } else {
+                                                vlc_cod=2;
+                                                vlc_data=0;
+                                        }
+                                }
+                        } else {
+                                if (vlc_cod==2) {
+                                        if (!bit)
+                                                vlc_data =  -(1<<vlc_size) + 1;
+                                        vlc_cod--;
+                                }
+                                vlc_size--;
+                                vlc_data+=bit<<vlc_size;
+                                if (!vlc_size) {
+                                        decode_JangGu_integrate(se401, vlc_data);
+                                        vlc_cod=0;
+                                }
+                        }
+                        bit_cur--;
+                        bit_exp--;
+                }
+                pos++;
+                data++;
+        }
+}
+
+static inline void decode_JangGu (struct usb_se401 *se401, struct se401_scratch *buffer)
+{
+        unsigned char *data=buffer->data;
+        int len=buffer->length;
+        int bit_exp=0, pix_exp=0, frameinfo=0, packetlength=0, size;
+        int datapos=0;
+
+        /* New image? */
+        if (!se401->frame[se401->curframe].curpix) {
+                se401->frame[se401->curframe].curlinepix=0;
+                se401->frame[se401->curframe].curline=
+                    se401->frame[se401->curframe].data+
+                    se401->cwidth*3-1;
+                if (se401->frame[se401->curframe].grabstate==FRAME_READY)
+                        se401->frame[se401->curframe].grabstate=FRAME_GRABBING;
+                se401->vlcdatapos=0;
+        }
+        while (datapos < len) {
+                size=1024-se401->vlcdatapos;
+                if (size+datapos > len)
+                        size=len-datapos;
+                memcpy(se401->vlcdata+se401->vlcdatapos, data+datapos, size);
+                se401->vlcdatapos+=size;
+                packetlength=0;
+                if (se401->vlcdatapos >= 4) {
+                        bit_exp=se401->vlcdata[3]+(se401->vlcdata[2]<<8);
+                        pix_exp=se401->vlcdata[1]+((se401->vlcdata[0]&0x3f)<<8);
+                        frameinfo=se401->vlcdata[0]&0xc0;
+                        packetlength=((bit_exp+47)>>4)<<1;
+                        if (packetlength > 1024) {
+                                se401->vlcdatapos=0;
+                                datapos=len;
+                                packetlength=0;
+                                se401->error++;
+                                se401->frame[se401->curframe].curpix=0;
+                        }
+                }
+                if (packetlength && se401->vlcdatapos >= packetlength) {
+                        decode_JangGu_vlc(se401, se401->vlcdata, bit_exp, packetlength);
+                        se401->frame[se401->curframe].curpix+=pix_exp*3;
+                        datapos+=size-(se401->vlcdatapos-packetlength);
+                        se401->vlcdatapos=0;
+                        if (se401->frame[se401->curframe].curpix>=se401->cwidth*se401->cheight*3) {
+                                if (se401->frame[se401->curframe].curpix==se401->cwidth*se401->cheight*3) {
+                                        if (se401->frame[se401->curframe].grabstate==FRAME_GRABBING) {
+                                                se401->frame[se401->curframe].grabstate=FRAME_DONE;
+                                                se401->framecount++;
+                                                se401->readcount++;
+                                        }
+                                        if (se401->frame[(se401->curframe+1)&(SE401_NUMFRAMES-1)].grabstate==FRAME_READY) {
+                                                se401->curframe=(se401->curframe+1) & (SE401_NUMFRAMES-1);
+                                        }
+                                } else {
+                                        se401->error++;
+                                }
+                                se401->frame[se401->curframe].curpix=0;
+                                datapos=len;
+                        }
+                } else {
+                        datapos+=size;
+                }
+        }
+}
+
+static inline void decode_bayer (struct usb_se401 *se401, struct se401_scratch *buffer)
+{
+        unsigned char *data=buffer->data;
+        int len=buffer->length;
+        int offset=buffer->offset;
+        int datasize=se401->cwidth*se401->cheight;
+        struct se401_frame *frame=&se401->frame[se401->curframe];
+
+        unsigned char *framedata=frame->data, *curline, *nextline;
+        int width=se401->cwidth;
+        int blineoffset=0, bline;
+        int linelength=width*3, i;
+        
+
+        if (frame->curpix==0) {
+                if (frame->grabstate==FRAME_READY) {
+                        frame->grabstate=FRAME_GRABBING;
+                }
+                frame->curline=framedata+linelength;
+                frame->curlinepix=0;
+        }
+
+        if (offset!=frame->curpix) {
+                /* Regard frame as lost :( */
+                frame->curpix=0;
+                se401->error++;
+                return;
+        }
+
+        /* Check if we have to much data */
+        if (frame->curpix+len > datasize) {
+                len=datasize-frame->curpix;
+        }
+        if (se401->cheight%4)
+                blineoffset=1;
+        bline=frame->curpix/se401->cwidth+blineoffset;
+
+        curline=frame->curline;
+        nextline=curline+linelength;
+        if (nextline >= framedata+datasize*3)
+                nextline=curline;
+        while (len) {
+                if (frame->curlinepix>=width) {
+                        frame->curlinepix-=width;
+                        bline=frame->curpix/width+blineoffset;
+                        curline+=linelength*2;
+                        nextline+=linelength*2;
+                        if (curline >= framedata+datasize*3) {
+                                frame->curlinepix++;
+                                curline-=3;
+                                nextline-=3;
+                                len--;
+                                data++;
+                                frame->curpix++;
+                        }
+                        if (nextline >= framedata+datasize*3)
+                                nextline=curline;
+                }
+                if ((bline&1)) {
+                        if ((frame->curlinepix&1)) {
+                                *(curline+2)=*data;
+                                *(curline-1)=*data;
+                                *(nextline+2)=*data;
+                                *(nextline-1)=*data;
+                        } else {
+                                *(curline+1)=
+                                        (*(curline+1)+*data)/2;
+                                *(curline-2)=
+                                        (*(curline-2)+*data)/2;
+                                *(nextline+1)=*data;
+                                *(nextline-2)=*data;
+                        }
+                } else {
+                        if ((frame->curlinepix&1)) {
+                                *(curline+1)=
+                                        (*(curline+1)+*data)/2;
+                                *(curline-2)=
+                                        (*(curline-2)+*data)/2;
+                                *(nextline+1)=*data;
+                                *(nextline-2)=*data;
+                        } else {
+                                *curline=*data;
+                                *(curline-3)=*data;
+                                *nextline=*data;
+                                *(nextline-3)=*data;
+                        }
+                }
+                frame->curlinepix++;
+                curline-=3;
+                nextline-=3;
+                len--;
+                data++;
+                frame->curpix++;
+        }
+        frame->curline=curline;
+
+        if (frame->curpix>=datasize) {
+                /* Fix the top line */
+                framedata+=linelength;
+                for (i=0; i<linelength; i++) {
+                        framedata--;
+                        *framedata=*(framedata+linelength);
+                }
+                /* Fix the left side (green is already present) */
+                for (i=0; i<se401->cheight; i++) {
+                        *framedata=*(framedata+3);
+                        *(framedata+1)=*(framedata+4);
+                        *(framedata+2)=*(framedata+5);
+                        framedata+=linelength;
+                }
+                frame->curpix=0;
+                frame->grabstate=FRAME_DONE;
+                se401->framecount++;
+                se401->readcount++;
+                if (se401->frame[(se401->curframe+1)&(SE401_NUMFRAMES-1)].grabstate==FRAME_READY) {
+                        se401->curframe=(se401->curframe+1) & (SE401_NUMFRAMES-1);
+                }
+        }
+}
+
+static int se401_newframe(struct usb_se401 *se401, int framenr)
+{
+        DECLARE_WAITQUEUE(wait, current);
+        int errors=0;
+
+        while (se401->streaming &&
+            (se401->frame[framenr].grabstate==FRAME_READY ||
+             se401->frame[framenr].grabstate==FRAME_GRABBING) ) {
+                if(!se401->frame[framenr].curpix) {
+                        errors++;
+                }
+                wait_interruptible(
+                    se401->scratch[se401->scratch_use].state!=BUFFER_READY,
+                    &se401->wq,
+                    &wait
+                );
+                if (se401->nullpackets > SE401_MAX_NULLPACKETS) {
+                        se401->nullpackets=0;
+                        info("to many null length packets, restarting capture");
+                        se401_stop_stream(se401);
+                        se401_start_stream(se401);                      
+                } else {
+                        if (se401->scratch[se401->scratch_use].state!=BUFFER_READY) {
+                                se401->frame[framenr].grabstate=FRAME_ERROR;
+                                return -EIO;
+                        }
+                        se401->scratch[se401->scratch_use].state=BUFFER_BUSY;
+                        if (se401->format==FMT_JANGGU) {
+                                decode_JangGu(se401, &se401->scratch[se401->scratch_use]);
+                        } else {
+                                decode_bayer(se401, &se401->scratch[se401->scratch_use]);
+                        }
+                        se401->scratch[se401->scratch_use].state=BUFFER_UNUSED;
+                        se401->scratch_use++;
+                        if (se401->scratch_use>=SE401_NUMSCRATCH)
+                                se401->scratch_use=0;
+                        if (errors > SE401_MAX_ERRORS) {
+                                errors=0;
+                                info("to much errors, restarting capture");
+                                se401_stop_stream(se401);
+                                se401_start_stream(se401);
+                        }
+                }
+        }
+
+        if (se401->frame[framenr].grabstate==FRAME_DONE)
+                if (se401->enhance)
+                        enhance_picture(se401->frame[framenr].data, se401->cheight*se401->cwidth*3);
+        return 0;
+}
+
+static void usb_se401_remove_disconnected (struct usb_se401 *se401)
+{
+        int i;
+
+        se401->dev = NULL;
+
+        for (i=0; i<SE401_NUMSBUF; i++)
+                if (se401->urb[i]) {
+                        usb_kill_urb(se401->urb[i]);
+                        usb_free_urb(se401->urb[i]);
+                        se401->urb[i] = NULL;
+                        kfree(se401->sbuf[i].data);
+                }
+        for (i=0; i<SE401_NUMSCRATCH; i++) {
+                kfree(se401->scratch[i].data);
+        }
+        if (se401->inturb) {
+                usb_kill_urb(se401->inturb);
+                usb_free_urb(se401->inturb);
+        }
+        info("%s disconnected", se401->camera_name);
+
+        /* Free the memory */
+        kfree(se401->width);
+        kfree(se401->height);
+        kfree(se401);
+}
+
+
+
+/****************************************************************************
+ *
+ * Video4Linux
+ *
+ ***************************************************************************/
+
+
+static int se401_open(struct inode *inode, struct file *file)
+{
+        struct video_device *dev = video_devdata(file);
+        struct usb_se401 *se401 = (struct usb_se401 *)dev;
+        int err = 0;
+
+        if (se401->user)
+                return -EBUSY;
+        se401->fbuf = rvmalloc(se401->maxframesize * SE401_NUMFRAMES);
+        if (se401->fbuf)
+                file->private_data = dev;
+        else 
+                err = -ENOMEM;
+        se401->user = !err;
+
+        return err;
+}
+
+static int se401_close(struct inode *inode, struct file *file)
+{
+        struct video_device *dev = file->private_data;
+        struct usb_se401 *se401 = (struct usb_se401 *)dev;
+        int i;
+
+        rvfree(se401->fbuf, se401->maxframesize * SE401_NUMFRAMES);
+        if (se401->removed) {
+                usb_se401_remove_disconnected(se401);
+                info("device unregistered");
+        } else {
+                for (i=0; i<SE401_NUMFRAMES; i++)
+                        se401->frame[i].grabstate=FRAME_UNUSED;
+                if (se401->streaming)
+                        se401_stop_stream(se401);
+                se401->user=0;
+        }
+        file->private_data = NULL;
+        return 0;
+}
+
+static int se401_do_ioctl(struct inode *inode, struct file *file,
+                          unsigned int cmd, void *arg)
+{
+        struct video_device *vdev = file->private_data;
+        struct usb_se401 *se401 = (struct usb_se401 *)vdev;
+
+        if (!se401->dev)
+                return -EIO;
+
+        switch (cmd) {
+        case VIDIOCGCAP:
+        {
+                struct video_capability *b = arg;
+                strcpy(b->name, se401->camera_name);
+                b->type = VID_TYPE_CAPTURE;
+                b->channels = 1;
+                b->audios = 0;
+                b->maxwidth = se401->width[se401->sizes-1];
+                b->maxheight = se401->height[se401->sizes-1];
+                b->minwidth = se401->width[0];
+                b->minheight = se401->height[0];
+                return 0;
+        }
+        case VIDIOCGCHAN:
+        {
+                struct video_channel *v = arg;
+
+                if (v->channel != 0)
+                        return -EINVAL;
+                v->flags = 0;
+                v->tuners = 0;
+                v->type = VIDEO_TYPE_CAMERA;
+                strcpy(v->name, "Camera");
+                return 0;
+        }
+        case VIDIOCSCHAN:
+        {
+                struct video_channel *v = arg;
+
+                if (v->channel != 0)
+                        return -EINVAL;
+                return 0;
+        }
+        case VIDIOCGPICT:
+        {
+                struct video_picture *p = arg;
+
+                se401_get_pict(se401, p);
+                return 0;
+        }
+        case VIDIOCSPICT:
+        {
+                struct video_picture *p = arg;
+
+                if (se401_set_pict(se401, p))
+                        return -EINVAL;
+                return 0;
+        }
+        case VIDIOCSWIN:
+        {
+                struct video_window *vw = arg;
+
+                if (vw->flags)
+                        return -EINVAL;
+                if (vw->clipcount)
+                        return -EINVAL;
+                if (se401_set_size(se401, vw->width, vw->height))
+                        return -EINVAL;
+                return 0;
+        }
+        case VIDIOCGWIN:
+        {
+                struct video_window *vw = arg;
+
+                vw->x = 0;               /* FIXME */
+                vw->y = 0;
+                vw->chromakey = 0;
+                vw->flags = 0;
+                vw->clipcount = 0;
+                vw->width = se401->cwidth;
+                vw->height = se401->cheight;
+                return 0;
+        }
+        case VIDIOCGMBUF:
+        {
+                struct video_mbuf *vm = arg;
+                int i;
+
+                memset(vm, 0, sizeof(*vm));
+                vm->size = SE401_NUMFRAMES * se401->maxframesize;
+                vm->frames = SE401_NUMFRAMES;
+                for (i=0; i<SE401_NUMFRAMES; i++)
+                        vm->offsets[i] = se401->maxframesize * i;
+                return 0;
+        }
+        case VIDIOCMCAPTURE:
+        {
+                struct video_mmap *vm = arg;
+
+                if (vm->format != VIDEO_PALETTE_RGB24)
+                        return -EINVAL;
+                if (vm->frame >= SE401_NUMFRAMES)
+                        return -EINVAL;
+                if (se401->frame[vm->frame].grabstate != FRAME_UNUSED)
+                        return -EBUSY;
+
+                /* Is this according to the v4l spec??? */
+                if (se401_set_size(se401, vm->width, vm->height))
+                        return -EINVAL;
+                se401->frame[vm->frame].grabstate=FRAME_READY;
+
+                if (!se401->streaming)
+                        se401_start_stream(se401);
+
+                /* Set the picture properties */
+                if (se401->framecount==0)
+                        se401_send_pict(se401);
+                /* Calibrate the reset level after a few frames. */
+                if (se401->framecount%20==1)
+                        se401_auto_resetlevel(se401);
+
+                return 0;
+        }
+        case VIDIOCSYNC:
+        {
+                int *frame = arg;
+                int ret=0;
+
+                if(*frame <0 || *frame >= SE401_NUMFRAMES)
+                        return -EINVAL;
+
+                ret=se401_newframe(se401, *frame);
+                se401->frame[*frame].grabstate=FRAME_UNUSED;
+                return ret;
+        }
+        case VIDIOCGFBUF:
+        {
+                struct video_buffer *vb = arg;
+
+                memset(vb, 0, sizeof(*vb));
+                return 0;
+        }
+        case VIDIOCKEY:
+                return 0;
+        case VIDIOCCAPTURE:
+                return -EINVAL;
+        case VIDIOCSFBUF:
+                return -EINVAL;
+        case VIDIOCGTUNER:
+        case VIDIOCSTUNER:
+                return -EINVAL;
+        case VIDIOCGFREQ:
+        case VIDIOCSFREQ:
+                return -EINVAL;
+        case VIDIOCGAUDIO:
+        case VIDIOCSAUDIO:
+                return -EINVAL;
+        default:
+                return -ENOIOCTLCMD;
+        } /* end switch */
+
+        return 0;
+}
+
+static int se401_ioctl(struct inode *inode, struct file *file,
+                       unsigned int cmd, unsigned long arg)
+{
+        return video_usercopy(inode, file, cmd, arg, se401_do_ioctl);
+}
+
+static ssize_t se401_read(struct file *file, char __user *buf,
+                     size_t count, loff_t *ppos)
+{
+        int realcount=count, ret=0;
+        struct video_device *dev = file->private_data;
+        struct usb_se401 *se401 = (struct usb_se401 *)dev;
+
+
+        if (se401->dev == NULL)
+                return -EIO;
+        if (realcount > se401->cwidth*se401->cheight*3)
+                realcount=se401->cwidth*se401->cheight*3;
+
+        /* Shouldn't happen: */
+        if (se401->frame[0].grabstate==FRAME_GRABBING)
+                return -EBUSY;
+        se401->frame[0].grabstate=FRAME_READY;
+        se401->frame[1].grabstate=FRAME_UNUSED;
+        se401->curframe=0;
+
+        if (!se401->streaming)
+                se401_start_stream(se401);
+
+        /* Set the picture properties */
+        if (se401->framecount==0)
+                se401_send_pict(se401);
+        /* Calibrate the reset level after a few frames. */
+        if (se401->framecount%20==1)
+                se401_auto_resetlevel(se401);
+
+        ret=se401_newframe(se401, 0);
+
+        se401->frame[0].grabstate=FRAME_UNUSED;
+        if (ret)
+                return ret;     
+        if (copy_to_user(buf, se401->frame[0].data, realcount))
+                return -EFAULT;
+
+        return realcount;
+}
+
+static int se401_mmap(struct file *file, struct vm_area_struct *vma)
+{
+        struct video_device *dev = file->private_data;
+        struct usb_se401 *se401 = (struct usb_se401 *)dev;
+        unsigned long start = vma->vm_start;
+        unsigned long size  = vma->vm_end-vma->vm_start;
+        unsigned long page, pos;
+
+        mutex_lock(&se401->lock);
+
+        if (se401->dev == NULL) {
+                mutex_unlock(&se401->lock);
+                return -EIO;
+        }
+        if (size > (((SE401_NUMFRAMES * se401->maxframesize) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))) {
+                mutex_unlock(&se401->lock);
+                return -EINVAL;
+        }
+        pos = (unsigned long)se401->fbuf;
+        while (size > 0) {
+                page = vmalloc_to_pfn((void *)pos);
+                if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
+                        mutex_unlock(&se401->lock);
+                        return -EAGAIN;
+                }
+                start += PAGE_SIZE;
+                pos += PAGE_SIZE;
+                if (size > PAGE_SIZE)
+                        size -= PAGE_SIZE;
+                else
+                        size = 0;
+        }
+        mutex_unlock(&se401->lock);
+
+        return 0;
+}
+
+static struct file_operations se401_fops = {
+        .owner =        THIS_MODULE,
+        .open =         se401_open,
+        .release =      se401_close,
+        .read =         se401_read,
+        .mmap =         se401_mmap,
+        .ioctl =        se401_ioctl,
+        .compat_ioctl = v4l_compat_ioctl32,
+        .llseek =       no_llseek,
+};
+static struct video_device se401_template = {
+        .owner =        THIS_MODULE,
+        .name =         "se401 USB camera",
+        .type =         VID_TYPE_CAPTURE,
+        .hardware =     VID_HARDWARE_SE401,
+        .fops =         &se401_fops,
+};
+
+
+
+/***************************/
+static int se401_init(struct usb_se401 *se401, int button)
+{
+        int i=0, rc;
+        unsigned char cp[0x40];
+        char temp[200];
+
+        /* led on */
+        se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 1, NULL, 0);
+
+        /* get camera descriptor */
+        rc=se401_sndctrl(0, se401, SE401_REQ_GET_CAMERA_DESCRIPTOR, 0, cp, sizeof(cp));
+        if (cp[1]!=0x41) {
+                err("Wrong descriptor type");
+                return 1;
+        }
+        sprintf (temp, "ExtraFeatures: %d", cp[3]);
+
+        se401->sizes=cp[4]+cp[5]*256;
+        se401->width=kmalloc(se401->sizes*sizeof(int), GFP_KERNEL);
+        if (!se401->width)
+                return 1;
+        se401->height=kmalloc(se401->sizes*sizeof(int), GFP_KERNEL);
+        if (!se401->height) {
+                kfree(se401->width);
+                return 1;
+        }
+        for (i=0; i<se401->sizes; i++) {
+                    se401->width[i]=cp[6+i*4+0]+cp[6+i*4+1]*256;
+                    se401->height[i]=cp[6+i*4+2]+cp[6+i*4+3]*256;
+        }
+        sprintf (temp, "%s Sizes:", temp);
+        for (i=0; i<se401->sizes; i++) {
+                sprintf(temp, "%s %dx%d", temp, se401->width[i], se401->height[i]);
+        }
+        info("%s", temp);
+        se401->maxframesize=se401->width[se401->sizes-1]*se401->height[se401->sizes-1]*3;
+
+        rc=se401_sndctrl(0, se401, SE401_REQ_GET_WIDTH, 0, cp, sizeof(cp));
+        se401->cwidth=cp[0]+cp[1]*256;
+        rc=se401_sndctrl(0, se401, SE401_REQ_GET_HEIGHT, 0, cp, sizeof(cp));
+        se401->cheight=cp[0]+cp[1]*256;
+
+        if (!cp[2] && SE401_FORMAT_BAYER) {
+                err("Bayer format not supported!");
+                return 1;
+        }
+        /* set output mode (BAYER) */
+        se401_sndctrl(1, se401, SE401_REQ_SET_OUTPUT_MODE, SE401_FORMAT_BAYER, NULL, 0);
+
+        rc=se401_sndctrl(0, se401, SE401_REQ_GET_BRT, 0, cp, sizeof(cp));
+        se401->brightness=cp[0]+cp[1]*256;
+        /* some default values */
+        se401->resetlevel=0x2d;
+        se401->rgain=0x20;
+        se401->ggain=0x20;
+        se401->bgain=0x20;
+        se401_set_exposure(se401, 20000);
+        se401->palette=VIDEO_PALETTE_RGB24;
+        se401->enhance=1;
+        se401->dropped=0;
+        se401->error=0;
+        se401->framecount=0;
+        se401->readcount=0;
+
+        /* Start interrupt transfers for snapshot button */
+        if (button) {
+                se401->inturb=usb_alloc_urb(0, GFP_KERNEL);
+                if (!se401->inturb) {
+                        info("Allocation of inturb failed");
+                        return 1;
+                }
+                usb_fill_int_urb(se401->inturb, se401->dev,
+                    usb_rcvintpipe(se401->dev, SE401_BUTTON_ENDPOINT),
+                    &se401->button, sizeof(se401->button),
+                    se401_button_irq,
+                    se401,
+                    8
+                );
+                if (usb_submit_urb(se401->inturb, GFP_KERNEL)) {
+                        info("int urb burned down");
+                        return 1;
+                }
+        } else
+                se401->inturb=NULL;
+
+        /* Flash the led */
+        se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 1, NULL, 0);
+        se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 1, NULL, 0);
+        se401_sndctrl(1, se401, SE401_REQ_CAMERA_POWER, 0, NULL, 0);
+        se401_sndctrl(1, se401, SE401_REQ_LED_CONTROL, 0, NULL, 0);
+
+        return 0;
+}
+
+static int se401_probe(struct usb_interface *intf,
+        const struct usb_device_id *id)
+{
+        struct usb_device *dev = interface_to_usbdev(intf);
+        struct usb_interface_descriptor *interface;
+        struct usb_se401 *se401;
+        char *camera_name=NULL;
+        int button=1;
+
+        /* We don't handle multi-config cameras */
+        if (dev->descriptor.bNumConfigurations != 1)
+                return -ENODEV;
+
+        interface = &intf->cur_altsetting->desc;
+
+        /* Is it an se401? */
+        if (le16_to_cpu(dev->descriptor.idVendor) == 0x03e8 &&
+            le16_to_cpu(dev->descriptor.idProduct) == 0x0004) {
+                camera_name="Endpoints/Aox SE401";
+        } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x0471 &&
+            le16_to_cpu(dev->descriptor.idProduct) == 0x030b) {
+                camera_name="Philips PCVC665K";
+        } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x047d &&
+            le16_to_cpu(dev->descriptor.idProduct) == 0x5001) {
+                camera_name="Kensington VideoCAM 67014";
+        } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x047d &&
+            le16_to_cpu(dev->descriptor.idProduct) == 0x5002) {
+                camera_name="Kensington VideoCAM 6701(5/7)";
+        } else if (le16_to_cpu(dev->descriptor.idVendor) == 0x047d &&
+            le16_to_cpu(dev->descriptor.idProduct) == 0x5003) {
+                camera_name="Kensington VideoCAM 67016";
+                button=0;
+        } else
+                return -ENODEV;
+
+        /* Checking vendor/product should be enough, but what the hell */
+        if (interface->bInterfaceClass != 0x00)
+                return -ENODEV;
+        if (interface->bInterfaceSubClass != 0x00)
+                return -ENODEV;
+
+        /* We found one */
+        info("SE401 camera found: %s", camera_name);
+
+        if ((se401 = kzalloc(sizeof(*se401), GFP_KERNEL)) == NULL) {
+                err("couldn't kmalloc se401 struct");
+                return -ENOMEM;
+        }
+
+        se401->dev = dev;
+        se401->iface = interface->bInterfaceNumber;
+        se401->camera_name = camera_name;
+
+        info("firmware version: %02x", le16_to_cpu(dev->descriptor.bcdDevice) & 255);
+
+        if (se401_init(se401, button)) {
+                kfree(se401);
+                return -EIO;
+        }
+
+        memcpy(&se401->vdev, &se401_template, sizeof(se401_template));
+        memcpy(se401->vdev.name, se401->camera_name, strlen(se401->camera_name));
+        init_waitqueue_head(&se401->wq);
+        mutex_init(&se401->lock);
+        wmb();
+
+        if (video_register_device(&se401->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
+                kfree(se401);
+                err("video_register_device failed");
+                return -EIO;
+        }
+        info("registered new video device: video%d", se401->vdev.minor);
+
+        usb_set_intfdata (intf, se401);
+        return 0;
+}
+
+static void se401_disconnect(struct usb_interface *intf)
+{
+        struct usb_se401 *se401 = usb_get_intfdata (intf);
+
+        usb_set_intfdata (intf, NULL);
+        if (se401) {
+                video_unregister_device(&se401->vdev);
+                if (!se401->user){
+                        usb_se401_remove_disconnected(se401);
+                } else {
+                        se401->frame[0].grabstate = FRAME_ERROR;
+                        se401->frame[0].grabstate = FRAME_ERROR;
+
+                        se401->streaming = 0;
+
+                        wake_up_interruptible(&se401->wq);
+                        se401->removed = 1;
+                }
+        }
+}
+
+static struct usb_driver se401_driver = {
+        .name           = "se401",
+        .id_table       = device_table,
+        .probe          = se401_probe,
+        .disconnect     = se401_disconnect,
+};
+
+
+
+/****************************************************************************
+ *
+ *  Module routines
+ *
+ ***************************************************************************/
+
+static int __init usb_se401_init(void)
+{
+        info("SE401 usb camera driver version %s registering", version);
+        if (flickerless)
+                if (flickerless!=50 && flickerless!=60) {
+                        info("Invallid flickerless value, use 0, 50 or 60.");
+                        return -1;
+        }
+        return usb_register(&se401_driver);
+}
+
+static void __exit usb_se401_exit(void)
+{
+        usb_deregister(&se401_driver);
+        info("SE401 driver deregistered");
+}
+
+module_init(usb_se401_init);
+module_exit(usb_se401_exit);