Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1436 insertions, 0 deletions

diff --git a/drivers/usb/media/se401.c b/drivers/usb/media/se401.c
new file mode 100644
index 000000000000..685bdae5cb62
--- /dev/null
+++ b/drivers/usb/media/se401.c
@@ -0,0 +1,1436 @@
+/*
+ * 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++) if (se401->scratch[i].data) {
+		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;
+
+	down(&se401->lock);
+
+	if (se401->dev == NULL) {
+		up(&se401->lock);
+		return -EIO;
+	}
+	if (size > (((SE401_NUMFRAMES * se401->maxframesize) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))) {
+		up(&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)) {
+			up(&se401->lock);
+			return -EAGAIN;
+		}
+		start += PAGE_SIZE;
+		pos += PAGE_SIZE;
+		if (size > PAGE_SIZE)
+			size -= PAGE_SIZE;
+		else
+			size = 0;
+	}
+	up(&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,
+	.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 = kmalloc(sizeof(*se401), GFP_KERNEL)) == NULL) {
+                err("couldn't kmalloc se401 struct");
+		return -ENOMEM;
+        }
+
+        memset(se401, 0, sizeof(*se401));
+
+        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);
+	init_MUTEX(&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 = {
+	.owner		= THIS_MODULE,
+        .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);