V4L/DVB (8152): Initial release of gspca with only one driver.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

7 files changed, 2810 insertions, 0 deletions

diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 8fca90b..a6fbee4 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -801,6 +801,8 @@ config USB_VIDEO_CLASS
 
 	  For more information see: <http://linux-uvc.berlios.de/>
 
+source "drivers/media/video/gspca/Kconfig"
+
 source "drivers/media/video/pvrusb2/Kconfig"
 
 source "drivers/media/video/em28xx/Kconfig"
diff --git a/drivers/media/video/gspca/Kconfig b/drivers/media/video/gspca/Kconfig
new file mode 100644
index 0000000..a04e413
--- /dev/null
+++ b/drivers/media/video/gspca/Kconfig
@@ -0,0 +1,13 @@
+config USB_GSPCA
+	tristate "USB GSPCA driver"
+	depends on VIDEO_V4L2
+	---help---
+	  Say Y here if you want support for various USB cameras.
+
+	  See <file:Documentation/video4linux/gspca.txt> for more info.
+
+	  This driver uses the Video For Linux API. You must say Y or M to
+	  "Video For Linux" to use this driver.
+
+	  To compile this driver as modules, choose M here: the
+	  modules will be called gspca_xxxx.
diff --git a/drivers/media/video/gspca/Makefile b/drivers/media/video/gspca/Makefile
new file mode 100644
index 0000000..885d445
--- /dev/null
+++ b/drivers/media/video/gspca/Makefile
@@ -0,0 +1,4 @@
+obj-$(CONFIG_GSPCA)	+= gspca_main.o gspca_stk014.o
+
+gspca_main-objs := gspca.o
+gspca_stk014-objs := stk014.o
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
new file mode 100644
index 0000000..4fe082f
--- /dev/null
+++ b/drivers/media/video/gspca/gspca.c
@@ -0,0 +1,1750 @@
+/*
+ * Main USB camera driver
+ *
+ * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
+ *
+ * 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.
+ */
+
+#define MODULE_NAME "gspca"
+
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/pagemap.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/uaccess.h>
+#include <linux/jiffies.h>
+
+#include "gspca.h"
+
+MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
+MODULE_DESCRIPTION("GSPCA USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+#define DRIVER_VERSION_NUMBER	KERNEL_VERSION(0, 0, 26)
+static const char version[] = "0.0.26";
+
+static int video_nr = -1;
+
+static int comp_fac = 30;	/* Buffer size ratio when compressed in % */
+
+#ifdef GSPCA_DEBUG
+int gspca_debug = D_ERR | D_PROBE;
+EXPORT_SYMBOL(gspca_debug);
+
+static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
+{
+	if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
+		PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
+			txt,
+			pixfmt & 0xff,
+			(pixfmt >> 8) & 0xff,
+			(pixfmt >> 16) & 0xff,
+			pixfmt >> 24,
+			w, h);
+	} else {
+		PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
+			txt,
+			pixfmt,
+			w, h);
+	}
+}
+#else
+#define PDEBUG_MODE(txt, pixfmt, w, h)
+#endif
+
+/*
+ * VMA operations.
+ */
+static void gspca_vm_open(struct vm_area_struct *vma)
+{
+	struct gspca_frame *frame = vma->vm_private_data;
+
+	frame->vma_use_count++;
+	frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
+}
+
+static void gspca_vm_close(struct vm_area_struct *vma)
+{
+	struct gspca_frame *frame = vma->vm_private_data;
+
+	if (--frame->vma_use_count <= 0)
+		frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
+}
+
+static struct vm_operations_struct gspca_vm_ops = {
+	.open		= gspca_vm_open,
+	.close		= gspca_vm_close,
+};
+
+/*
+ * ISOC message interrupt from the USB device
+ *
+ * Analyse each packet and call the subdriver for doing the copy
+ * to the frame buffer.
+ */
+static void isoc_irq(struct urb *urb)
+{
+	struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
+	struct gspca_frame *frame;
+	unsigned char *data;	/* address of data in the iso message */
+	int i, j, len, st;
+	cam_pkt_op pkt_scan;
+
+	PDEBUG(D_PACK, "isoc irq");
+	if (!gspca_dev->streaming)
+		return;
+	pkt_scan = gspca_dev->sd_desc->pkt_scan;
+	for (i = 0; i < urb->number_of_packets; i++) {
+
+		/* check the availability of the frame buffer */
+		j = gspca_dev->fr_i;
+		j = gspca_dev->fr_queue[j];
+		frame = &gspca_dev->frame[j];
+		if ((frame->v4l2_buf.flags
+				& (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
+					!= V4L2_BUF_FLAG_QUEUED) {
+			gspca_dev->last_packet_type = DISCARD_PACKET;
+			break;
+		}
+
+		/* check the packet status and length */
+		len = urb->iso_frame_desc[i].actual_length;
+		st = urb->iso_frame_desc[i].status;
+		if (st) {
+			PDEBUG(D_ERR, "ISOC data error: [%d] len=%d, status=%d",
+				i, len, st);
+			gspca_dev->last_packet_type = DISCARD_PACKET;
+			continue;
+		}
+		if (len == 0)
+			continue;
+
+		/* let the packet be analyzed by the subdriver */
+		PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
+			i, urb->iso_frame_desc[i].offset, len);
+		data = (unsigned char *) urb->transfer_buffer
+					+ urb->iso_frame_desc[i].offset;
+		pkt_scan(gspca_dev, frame, data, len);
+	}
+
+	/* resubmit the URB */
+	urb->status = 0;
+	st = usb_submit_urb(urb, GFP_ATOMIC);
+	if (st < 0)
+		PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
+}
+
+/*
+ * add data to the current frame
+ *
+ * This function is called by the subdrivers at interrupt level.
+ * To build a frame, these ones must add
+ *	- one FIRST_PACKET
+ *	- 0 or many INTER_PACKETs
+ *	- one LAST_PACKET
+ * DISCARD_PACKET invalidates the whole frame.
+ * On LAST_PACKET, a new frame is returned.
+ */
+struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
+				    int packet_type,
+				    struct gspca_frame *frame,
+				    unsigned char *data,
+				    int len)
+{
+	int i, j;
+
+	PDEBUG(D_PACK, "add t:%d l:%d %02x %02x %02x %02x...",
+		packet_type, len, data[0], data[1], data[2], data[3]);
+
+	/* when start of a new frame, if the current frame buffer
+	 * is not queued, discard the whole frame */
+	if (packet_type == FIRST_PACKET) {
+		if ((frame->v4l2_buf.flags
+				& (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
+					!= V4L2_BUF_FLAG_QUEUED) {
+			gspca_dev->last_packet_type = DISCARD_PACKET;
+			return frame;
+		}
+		frame->data_end = frame->data;
+		jiffies_to_timeval(get_jiffies_64(),
+				   &frame->v4l2_buf.timestamp);
+		frame->v4l2_buf.sequence = ++gspca_dev->sequence;
+	} else if (gspca_dev->last_packet_type == DISCARD_PACKET)
+		return frame;
+
+	/* append the packet in the frame buffer */
+	if (len > 0) {
+		if (frame->data_end - frame->data + len
+						 > frame->v4l2_buf.length) {
+			PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d",
+				frame->data_end - frame->data + len,
+				frame->v4l2_buf.length);
+			packet_type = DISCARD_PACKET;
+		} else {
+			if (frame->v4l2_buf.memory != V4L2_MEMORY_USERPTR)
+				memcpy(frame->data_end, data, len);
+			else
+				copy_to_user(frame->data_end, data, len);
+			frame->data_end += len;
+		}
+	}
+	gspca_dev->last_packet_type = packet_type;
+
+	/* if last packet, wake the application and advance in the queue */
+	if (packet_type == LAST_PACKET) {
+		frame->v4l2_buf.bytesused = frame->data_end - frame->data;
+		frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED;
+		frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE;
+		atomic_inc(&gspca_dev->nevent);
+		wake_up_interruptible(&gspca_dev->wq);	/* event = new frame */
+		i = gspca_dev->fr_i;
+		i = (i + 1) % gspca_dev->nframes;
+		PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d",
+			frame->v4l2_buf.bytesused,
+			gspca_dev->fr_q,
+			i,
+			gspca_dev->fr_o);
+		j = gspca_dev->fr_queue[i];
+		frame = &gspca_dev->frame[j];
+		gspca_dev->fr_i = i;
+	}
+	return frame;
+}
+EXPORT_SYMBOL(gspca_frame_add);
+
+static int gspca_is_compressed(__u32 format)
+{
+	switch (format) {
+	case V4L2_PIX_FMT_MJPEG:
+	case V4L2_PIX_FMT_JPEG:
+		return 1;
+	}
+	return 0;
+}
+
+static void *rvmalloc(unsigned long size)
+{
+	void *mem;
+	unsigned long adr;
+
+	size = PAGE_ALIGN(size);
+	mem = vmalloc_32(size);
+	if (mem != 0) {
+		memset(mem, 0, size);
+		adr = (unsigned long) mem;
+		while ((long) 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);
+}
+
+static int frame_alloc(struct gspca_dev *gspca_dev,
+			unsigned int count,
+			unsigned int frsz,
+			enum v4l2_memory memory)
+{
+	int i, ret = 0;
+
+	PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
+	if (gspca_dev->nframes != 0) {
+		PDEBUG(D_ERR|D_STREAM, "alloc frame already done");
+		return -EBUSY;
+	}
+	if (count > GSPCA_MAX_FRAMES)
+		count = GSPCA_MAX_FRAMES;
+	/* if compressed, reduce the buffer size */
+	if (gspca_is_compressed(gspca_dev->pixfmt))
+		frsz = (frsz * comp_fac) / 100;
+	frsz = PAGE_ALIGN(frsz);
+	PDEBUG(D_STREAM, "new fr_sz: %d", frsz);
+	gspca_dev->frsz = frsz;
+	if (memory == V4L2_MEMORY_MMAP) {
+		gspca_dev->frbuf = rvmalloc(frsz * count);
+		if (!gspca_dev->frbuf) {
+			err("frame alloc failed");
+			return -ENOMEM;
+		}
+	}
+	gspca_dev->nframes = count;
+	for (i = 0; i < count; i++) {
+		gspca_dev->frame[i].v4l2_buf.index = i;
+		gspca_dev->frame[i].v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		gspca_dev->frame[i].v4l2_buf.flags = 0;
+		gspca_dev->frame[i].v4l2_buf.field = V4L2_FIELD_NONE;
+		gspca_dev->frame[i].v4l2_buf.length = frsz;
+		gspca_dev->frame[i].v4l2_buf.memory = memory;
+		if (memory == V4L2_MEMORY_MMAP) {
+			gspca_dev->frame[i].data
+				= gspca_dev->frame[i].data_end
+				= gspca_dev->frbuf + i * frsz;
+			gspca_dev->frame[i].v4l2_buf.m.offset = i * frsz;
+		}
+		gspca_dev->frame[i].v4l2_buf.flags = 0;	/* buf in app space */
+	}
+	gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
+	gspca_dev->last_packet_type = DISCARD_PACKET;
+	gspca_dev->sequence = 0;
+	atomic_set(&gspca_dev->nevent, 0);
+	return ret;
+}
+
+static void frame_free(struct gspca_dev *gspca_dev)
+{
+	int i;
+
+	PDEBUG(D_STREAM, "frame free");
+	if (gspca_dev->frbuf != 0) {
+		rvfree(gspca_dev->frbuf,
+			gspca_dev->nframes * gspca_dev->frsz);
+		gspca_dev->frbuf = NULL;
+		for (i = 0; i < gspca_dev->nframes; i++)
+			gspca_dev->frame[i].data = NULL;
+	}
+	gspca_dev->nframes = 0;
+}
+
+static int gspca_kill_transfer(struct gspca_dev *gspca_dev)
+{
+	struct urb *urb;
+	unsigned int i;
+
+	PDEBUG(D_STREAM, "kill transfer");
+	gspca_dev->streaming = 0;
+	for (i = 0; i < NURBS; ++i) {
+		urb = gspca_dev->pktbuf[i].urb;
+		if (urb == NULL)
+			continue;
+
+		gspca_dev->pktbuf[i].urb = NULL;
+		usb_kill_urb(urb);
+
+		/* urb->transfer_buffer_length is not touched by USB core,
+		 * so we can use it here as the buffer length */
+		if (gspca_dev->pktbuf[i].data) {
+			usb_buffer_free(gspca_dev->dev,
+					urb->transfer_buffer_length,
+					gspca_dev->pktbuf[i].data,
+					urb->transfer_dma);
+			gspca_dev->pktbuf[i].data = NULL;
+		}
+		usb_free_urb(urb);
+	}
+	return 0;
+}
+
+/*
+ * search an input isochronous endpoint in an alternate setting
+ */
+static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt,
+					  __u8 epaddr)
+{
+	struct usb_host_endpoint *ep;
+	int i, attr;
+
+	epaddr |= USB_DIR_IN;
+	for (i = 0; i < alt->desc.bNumEndpoints; i++) {
+		ep = &alt->endpoint[i];
+		if (ep->desc.bEndpointAddress == epaddr) {
+			attr = ep->desc.bmAttributes
+						& USB_ENDPOINT_XFERTYPE_MASK;
+			if (attr == USB_ENDPOINT_XFER_ISOC)
+				return ep;
+			break;
+		}
+	}
+	return NULL;
+}
+
+/*
+ * search an input isochronous endpoint
+ *
+ * The endpoint is defined by the subdriver.
+ * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
+ * This routine may be called many times when the bandwidth is too small
+ * (the bandwidth is checked on urb submit).
+ */
+struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev)
+{
+	struct usb_interface *intf;
+	struct usb_host_endpoint *ep;
+	int i, ret;
+
+	intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
+	i = gspca_dev->alt;			/* previous alt setting */
+	while (--i > 0) {			/* alt 0 is unusable */
+		ep = alt_isoc(&intf->altsetting[i], gspca_dev->cam.epaddr);
+		if (ep)
+			break;
+	}
+	if (i <= 0) {
+		err("no ISOC endpoint found");
+		return NULL;
+	}
+	PDEBUG(D_STREAM, "use ISOC alt %d ep 0x%02x",
+			i, ep->desc.bEndpointAddress);
+	ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
+	if (ret < 0) {
+		err("set interface err %d", ret);
+		return NULL;
+	}
+	gspca_dev->alt = i;
+	return ep;
+}
+
+/*
+ * create the isochronous URBs
+ */
+static int create_urbs(struct gspca_dev *gspca_dev,
+			struct usb_host_endpoint *ep)
+{
+	struct urb *urb;
+	int n, i, psize, npkt, bsize;
+
+	/* calculate the packet size and the number of packets */
+	/* the URB buffer size must be a power of 2 */
+	psize = le16_to_cpu(ep->desc.wMaxPacketSize);
+	/* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
+	psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
+	npkt = ISO_MAX_SIZE / psize;
+	if (npkt > ISO_MAX_PKT)
+		npkt = ISO_MAX_PKT;
+	bsize = psize * npkt;
+	for (n = ISO_MAX_SIZE; n > 0; n >>= 1) {
+		if (n & bsize)	/* !! assume ISO_MAX_SIZE is a power of 2 */
+			break;
+	}
+	if (n != 0) {
+		npkt = n / psize;
+		bsize = psize * npkt;
+	}
+	PDEBUG(D_STREAM,
+		"isoc %d pkts size %d (bsize:%d)", npkt, psize, bsize);
+	for (n = 0; n < NURBS; n++) {
+		urb = usb_alloc_urb(npkt, GFP_KERNEL);
+		if (!urb) {
+			err("usb_alloc_urb failed");
+			return -ENOMEM;
+		}
+		gspca_dev->pktbuf[n].data = usb_buffer_alloc(gspca_dev->dev,
+						bsize,
+						GFP_KERNEL,
+						&urb->transfer_dma);
+
+		if (gspca_dev->pktbuf[n].data == NULL) {
+			usb_free_urb(urb);
+			gspca_kill_transfer(gspca_dev);
+			err("usb_buffer_urb failed");
+			return -ENOMEM;
+		}
+		gspca_dev->pktbuf[n].urb = urb;
+		urb->dev = gspca_dev->dev;
+		urb->context = gspca_dev;
+		urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
+					    ep->desc.bEndpointAddress);
+		urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
+		urb->interval = ep->desc.bInterval;
+		urb->transfer_buffer = gspca_dev->pktbuf[n].data;
+		urb->complete = isoc_irq;
+		urb->number_of_packets = npkt;
+		urb->transfer_buffer_length = bsize;
+		for (i = 0; i < npkt; i++) {
+			urb->iso_frame_desc[i].length = psize;
+			urb->iso_frame_desc[i].offset = psize * i;
+		}
+	}
+	return 0;
+}
+
+/*
+ * start the USB transfer
+ */
+static int gspca_init_transfer(struct gspca_dev *gspca_dev)
+{
+	struct usb_interface *intf;
+	struct usb_host_endpoint *ep;
+	int n, ret;
+
+	ret = mutex_lock_interruptible(&gspca_dev->usb_lock);
+	if (ret < 0)
+		return ret;
+
+	/* set the max alternate setting and loop until urb submit succeeds */
+	intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
+	gspca_dev->alt = intf->num_altsetting;
+	for (;;) {
+		PDEBUG(D_STREAM, "init transfer nbalt %d", gspca_dev->alt);
+		ep = get_isoc_ep(gspca_dev);
+		if (ep == NULL) {
+			ret = -EIO;
+			goto out;
+		}
+		ret = create_urbs(gspca_dev, ep);
+		if (ret < 0)
+			goto out;
+
+		/* start the cam */
+		gspca_dev->sd_desc->start(gspca_dev);
+		gspca_dev->streaming = 1;
+		atomic_set(&gspca_dev->nevent, 0);
+
+		/* submit the URBs */
+		for (n = 0; n < NURBS; n++) {
+			ret = usb_submit_urb(gspca_dev->pktbuf[n].urb,
+						 GFP_KERNEL);
+			if (ret < 0) {
+				PDEBUG(D_ERR|D_STREAM,
+					"usb_submit_urb [%d] err %d", n, ret);
+				gspca_kill_transfer(gspca_dev);
+				if (ret == -ENOSPC)
+					break;	/* try the previous alt */
+				goto out;
+			}
+		}
+		if (ret >= 0)
+			break;
+	}
+out:
+	mutex_unlock(&gspca_dev->usb_lock);
+	return ret;
+}
+
+static int gspca_set_alt0(struct gspca_dev *gspca_dev)
+{
+	int ret;
+
+	ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
+	if (ret < 0)
+		PDEBUG(D_ERR|D_STREAM, "set interface 0 err %d", ret);
+	return ret;
+}
+
+static void gspca_stream_off(struct gspca_dev *gspca_dev)
+{
+	mutex_lock_interruptible(&gspca_dev->usb_lock);
+	gspca_dev->streaming = 0;
+	if (gspca_dev->present) {
+		gspca_dev->sd_desc->stopN(gspca_dev);
+		gspca_kill_transfer(gspca_dev);
+		gspca_set_alt0(gspca_dev);
+		gspca_dev->sd_desc->stop0(gspca_dev);
+		PDEBUG(D_STREAM, "stream off OK");
+	} else {
+		gspca_kill_transfer(gspca_dev);
+		atomic_inc(&gspca_dev->nevent);
+		wake_up_interruptible(&gspca_dev->wq);
+		PDEBUG(D_ERR|D_STREAM, "stream off no device ??");
+	}
+	mutex_unlock(&gspca_dev->usb_lock);
+}
+
+static int gspca_set_default_mode(struct gspca_dev *gspca_dev)
+{
+	int i;
+
+	i = gspca_dev->cam.nmodes - 1;	/* take the highest mode */
+	gspca_dev->curr_mode = i;
+	gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
+	gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
+	gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixfmt;
+	return 0;
+}
+
+static int wxh_to_mode(struct gspca_dev *gspca_dev,
+			int width, int height)
+{
+	int i;
+
+	for (i = gspca_dev->cam.nmodes - 1; --i >= 0; ) {
+		if (width > gspca_dev->cam.cam_mode[i].width)
+			break;
+	}
+	i++;
+	while (i < gspca_dev->cam.nmodes - 1
+	       && width == gspca_dev->cam.cam_mode[i + 1].width
+	       && height < gspca_dev->cam.cam_mode[i + 1].height)
+		i++;
+	return i;
+}
+
+static __u32 get_v4l2_depth(__u32 pixfmt)
+{
+	switch (pixfmt) {
+	case V4L2_PIX_FMT_BGR32:
+	case V4L2_PIX_FMT_RGB32:
+		return 32;
+	case V4L2_PIX_FMT_RGB24:
+	case V4L2_PIX_FMT_BGR24:
+		return 24;
+	case V4L2_PIX_FMT_RGB565:
+	case V4L2_PIX_FMT_YUYV:		/* packed 4.2.2 */
+	case V4L2_PIX_FMT_YYUV:
+		return 16;
+	case V4L2_PIX_FMT_YUV420:	/* planar 4.2.0 */
+		return 12;
+	case V4L2_PIX_FMT_MJPEG:
+	case V4L2_PIX_FMT_JPEG:
+	case V4L2_PIX_FMT_SBGGR8:	/* Bayer */
+		return 8;
+	}
+	PDEBUG(D_ERR|D_CONF, "Unknown pixel format %c%c%c%c",
+		pixfmt & 0xff,
+		(pixfmt >> 8) & 0xff,
+		(pixfmt >> 16) & 0xff,
+		pixfmt >> 24);
+	return -EINVAL;
+}
+
+/*
+ * search a mode with the right pixel format
+ */
+static int gspca_get_mode(struct gspca_dev *gspca_dev,
+			int mode,
+			int pixfmt)
+{
+	int modeU, modeD;
+
+	modeU = modeD = mode;
+	while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
+		if (--modeD >= 0) {
+			if (gspca_dev->cam.cam_mode[modeD].pixfmt == pixfmt)
+				return modeD;
+		}
+		if (++modeU < gspca_dev->cam.nmodes) {
+			if (gspca_dev->cam.cam_mode[modeU].pixfmt == pixfmt)
+				return modeU;
+		}
+	}
+	return -EINVAL;
+}
+
+static int vidioc_enum_fmt_cap(struct file *file, void  *priv,
+				struct v4l2_fmtdesc *fmtdesc)
+{
+	struct gspca_dev *gspca_dev = priv;
+	int i, j, index;
+	__u32 fmt_tb[8];
+
+	PDEBUG(D_CONF, "enum fmt cap");
+
+	/* give an index to each format */
+	index = 0;
+	j = 0;
+	for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
+		fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixfmt;
+		j = 0;
+		for (;;) {
+			if (fmt_tb[j] == fmt_tb[index])
+				break;
+			j++;
+		}
+		if (j == index) {
+			if (fmtdesc->index == index)
+				break;		/* new format */
+			index++;
+			if (index >= sizeof fmt_tb / sizeof fmt_tb[0])
+				return -EINVAL;
+		}
+	}
+	if (i < 0)
+		return -EINVAL;		/* no more format */
+
+	fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	fmtdesc->pixelformat = fmt_tb[index];
+	if (gspca_is_compressed(fmt_tb[index]))
+		fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
+	fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
+	fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
+	fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
+	fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
+	fmtdesc->description[4] = '\0';
+	return 0;
+}
+
+static int gspca_get_buff_size(struct gspca_dev *gspca_dev)
+{
+	unsigned int size;
+
+	size = gspca_dev->width * gspca_dev->height
+				* get_v4l2_depth(gspca_dev->pixfmt) / 8;
+	if (!size)
+		return -ENOMEM;
+	return size;
+}
+
+static int vidioc_g_fmt_cap(struct file *file, void *priv,
+			    struct v4l2_format *fmt)
+{
+	struct gspca_dev *gspca_dev = priv;
+
+	fmt->fmt.pix.width = gspca_dev->width;
+	fmt->fmt.pix.height = gspca_dev->height;
+	fmt->fmt.pix.pixelformat = gspca_dev->pixfmt;
+#ifdef GSPCA_DEBUG
+	if (gspca_debug & D_CONF) {
+		PDEBUG_MODE("get fmt cap",
+			fmt->fmt.pix.pixelformat,
+			fmt->fmt.pix.width,
+			fmt->fmt.pix.height);
+	}
+#endif
+	fmt->fmt.pix.field = V4L2_FIELD_NONE;
+	fmt->fmt.pix.bytesperline = get_v4l2_depth(fmt->fmt.pix.pixelformat)
+					* fmt->fmt.pix.width / 8;
+	fmt->fmt.pix.sizeimage = fmt->fmt.pix.bytesperline
+					* fmt->fmt.pix.height;
+/* (should be in the subdriver) */
+	fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
+	fmt->fmt.pix.priv = 0;
+	return 0;
+}
+
+static int try_fmt_cap(struct file *file,
+			void *priv,
+			struct v4l2_format *fmt)
+{
+	struct gspca_dev *gspca_dev = priv;
+	int w, h, mode, mode2, frsz;
+
+	w = (int) fmt->fmt.pix.width;
+	h = (int) fmt->fmt.pix.height;
+#ifdef GSPCA_DEBUG
+	if (gspca_debug & D_CONF)
+		PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
+#endif
+	/* search the closest mode for width and height */
+	mode = wxh_to_mode(gspca_dev, w, h);
+
+	/* OK if right palette */
+	if (gspca_dev->cam.cam_mode[mode].pixfmt != fmt->fmt.pix.pixelformat) {
+
+		/* else, search the closest mode with the same pixel format */
+		mode2 = gspca_get_mode(gspca_dev, mode,
+					fmt->fmt.pix.pixelformat);
+		if (mode2 >= 0)
+			mode = mode2;
+		else {
+
+			/* no chance, return this mode */
+			fmt->fmt.pix.pixelformat
+				= gspca_dev->cam.cam_mode[mode].pixfmt;
+#ifdef GSPCA_DEBUG
+			if (gspca_debug & D_CONF) {
+				PDEBUG_MODE("new format",
+					fmt->fmt.pix.pixelformat,
+					gspca_dev->cam.cam_mode[mode].width,
+					gspca_dev->cam.cam_mode[mode].height);
+			}
+#endif
+		}
+	}
+	fmt->fmt.pix.width = gspca_dev->cam.cam_mode[mode].width;
+	fmt->fmt.pix.height = gspca_dev->cam.cam_mode[mode].height;
+	fmt->fmt.pix.bytesperline = get_v4l2_depth(fmt->fmt.pix.pixelformat)
+					* fmt->fmt.pix.width / 8;
+	frsz = fmt->fmt.pix.bytesperline * fmt->fmt.pix.height;
+	if (gspca_is_compressed(fmt->fmt.pix.pixelformat))
+		frsz = (frsz * comp_fac) / 100;
+	fmt->fmt.pix.sizeimage = frsz;
+	return mode;			/* used when s_fmt */
+}
+
+static int vidioc_try_fmt_cap(struct file *file,
+			      void *priv,
+			      struct v4l2_format *fmt)
+{
+	int ret;
+
+/*	mutex_lock_interruptible(&gspca_dev->queue_lock); */
+	ret = try_fmt_cap(file, priv, fmt);
+/*	mutex_unlock(&gspca_dev->queue_lock); */
+	if (ret < 0)
+		return ret;
+	return 0;
+}
+
+static int vidioc_s_fmt_cap(struct file *file, void *priv,
+			    struct v4l2_format *fmt)
+{
+	struct gspca_dev *gspca_dev = priv;
+	int ret, was_streaming;
+
+#ifdef GSPCA_DEBUG
+	if (gspca_debug & D_CONF) {
+		PDEBUG_MODE("set fmt cap",
+			fmt->fmt.pix.pixelformat,
+			fmt->fmt.pix.width, fmt->fmt.pix.height);
+	}
+#endif
+	mutex_lock_interruptible(&gspca_dev->queue_lock);
+	ret = try_fmt_cap(file, priv, fmt);
+	if (ret < 0)
+		goto out;
+
+	if (ret == gspca_dev->curr_mode)
+		goto out;			/* same mode */
+	was_streaming = gspca_dev->streaming;
+	if (was_streaming != 0)
+		gspca_stream_off(gspca_dev);
+	gspca_dev->width = (int) fmt->fmt.pix.width;
+	gspca_dev->height = (int) fmt->fmt.pix.height;
+	gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
+	gspca_dev->curr_mode = ret;
+	if (was_streaming)
+		ret = gspca_init_transfer(gspca_dev);
+out:
+	mutex_unlock(&gspca_dev->queue_lock);
+	return ret;
+}
+
+static int dev_open(struct inode *inode, struct file *file)
+{
+	struct gspca_dev *gspca_dev;
+	int ret;
+
+	PDEBUG(D_STREAM, "opening");
+	gspca_dev = (struct gspca_dev *) video_devdata(file);
+	ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+	if (ret < 0)
+		return ret;
+	if (!gspca_dev->present) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	/* if not done yet, initialize the sensor */
+	if (gspca_dev->users == 0) {
+		ret = mutex_lock_interruptible(&gspca_dev->usb_lock);
+		if (ret < 0)
+			goto out;
+		ret = gspca_dev->sd_desc->open(gspca_dev);
+		mutex_unlock(&gspca_dev->usb_lock);
+		if (ret != 0) {
+			PDEBUG(D_ERR|D_CONF, "init device failed %d", ret);
+			goto out;
+		}
+	} else if (gspca_dev->users > 8) {	/* (arbitrary value) */
+		ret = -EBUSY;
+		goto out;
+	}
+	gspca_dev->users++;
+	file->private_data = gspca_dev;
+#ifdef GSPCA_DEBUG
+	/* activate the v4l2 debug */
+	if (gspca_debug & D_CONF)
+		gspca_dev->vdev.debug |= 3;
+	else
+		gspca_dev->vdev.debug &= ~3;
+#endif
+out:
+	mutex_unlock(&gspca_dev->queue_lock);
+	if (ret != 0)
+		PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
+	else
+		PDEBUG(D_STREAM, "open OK");
+	return ret;
+}
+
+static int dev_close(struct inode *inode, struct file *file)
+{
+	struct gspca_dev *gspca_dev = file->private_data;
+
+	PDEBUG(D_STREAM, "closing");
+	if (gspca_dev->streaming) {
+		mutex_lock_interruptible(&gspca_dev->queue_lock);
+		gspca_stream_off(gspca_dev);
+		mutex_unlock(&gspca_dev->queue_lock);
+	}
+	mutex_lock_interruptible(&gspca_dev->usb_lock);
+	gspca_dev->sd_desc->close(gspca_dev);
+	mutex_unlock(&gspca_dev->usb_lock);
+	atomic_inc(&gspca_dev->nevent);
+	wake_up_interruptible(&gspca_dev->wq);	/* wake blocked processes */
+	schedule();
+	mutex_lock_interruptible(&gspca_dev->queue_lock);
+	frame_free(gspca_dev);
+	file->private_data = NULL;
+	gspca_dev->users--;
+	mutex_unlock(&gspca_dev->queue_lock);
+	PDEBUG(D_STREAM, "closed");
+	return 0;
+}
+
+static int vidioc_querycap(struct file *file, void  *priv,
+			   struct v4l2_capability *cap)
+{
+	struct gspca_dev *gspca_dev = priv;
+
+	PDEBUG(D_CONF, "querycap");
+	memset(cap, 0, sizeof *cap);
+	strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
+	strncpy(cap->card, gspca_dev->cam.dev_name, sizeof cap->card);
+	strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name,
+		sizeof cap->bus_info);
+	cap->version = DRIVER_VERSION_NUMBER;
+	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
+			  | V4L2_CAP_STREAMING
+			  | V4L2_CAP_READWRITE;
+	return 0;
+}
+
+static int vidioc_queryctrl(struct file *file, void *priv,
+			   struct v4l2_queryctrl *q_ctrl)
+{
+	struct gspca_dev *gspca_dev = priv;
+	int i;
+
+	PDEBUG(D_CONF, "queryctrl");
+	for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
+		if (q_ctrl->id == gspca_dev->sd_desc->ctrls[i].qctrl.id) {
+			memcpy(q_ctrl,
+				&gspca_dev->sd_desc->ctrls[i].qctrl,
+				sizeof *q_ctrl);
+			return 0;
+		}
+	}
+	if (q_ctrl->id >= V4L2_CID_BASE
+	    && q_ctrl->id <= V4L2_CID_LASTP1) {
+		q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+			 struct v4l2_control *ctrl)
+{
+	struct gspca_dev *gspca_dev = priv;
+	struct ctrl *ctrls;
+	int i, ret;
+
+	PDEBUG(D_CONF, "set ctrl");
+	for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
+	     i < gspca_dev->sd_desc->nctrls;
+	     i++, ctrls++) {
+		if (ctrl->id != ctrls->qctrl.id)
+			continue;
+		if (ctrl->value < ctrls->qctrl.minimum
+		    && ctrl->value > ctrls->qctrl.maximum)
+			return -ERANGE;
+		PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
+		mutex_lock_interruptible(&gspca_dev->usb_lock);
+		ret = ctrls->set(gspca_dev, ctrl->value);
+		mutex_unlock(&gspca_dev->usb_lock);
+		return ret;
+	}
+	return -EINVAL;
+}
+
+static int vidioc_g_ctrl(struct file *file, void *priv,
+			 struct v4l2_control *ctrl)
+{
+	struct gspca_dev *gspca_dev = priv;
+
+	struct ctrl *ctrls;
+	int i, ret;
+
+	for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
+	     i < gspca_dev->sd_desc->nctrls;
+	     i++, ctrls++) {
+		if (ctrl->id != ctrls->qctrl.id)
+			continue;
+		mutex_lock_interruptible(&gspca_dev->usb_lock);
+		ret = ctrls->get(gspca_dev, &ctrl->value);
+		mutex_unlock(&gspca_dev->usb_lock);
+		return ret;
+	}
+	return -EINVAL;
+}
+
+static int vidioc_querymenu(struct file *file, void *priv,
+			    struct v4l2_querymenu *qmenu)
+{
+	struct gspca_dev *gspca_dev = priv;
+
+	if (!gspca_dev->sd_desc->querymenu)
+		return -EINVAL;
+	return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
+}
+
+static int vidioc_enum_input(struct file *file, void *priv,
+				struct v4l2_input *input)
+{
+	struct gspca_dev *gspca_dev = priv;
+
+	if (input->index != 0)
+		return -EINVAL;
+	memset(input, 0, sizeof *input);
+	input->type = V4L2_INPUT_TYPE_CAMERA;
+	strncpy(input->name, gspca_dev->sd_desc->name,
+		sizeof input->name);
+	return 0;
+}
+
+static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
+{
+	*i = 0;
+	return 0;
+}
+
+static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
+{
+	if (i > 0)
+		return -EINVAL;
+	return (0);
+}
+
+static int vidioc_reqbufs(struct file *file, void *priv,
+			  struct v4l2_requestbuffers *rb)
+{
+	struct gspca_dev *gspca_dev = priv;
+	int frsz, ret;
+
+	PDEBUG(D_STREAM, "reqbufs %d", rb->count);
+	if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+	if (rb->memory != V4L2_MEMORY_MMAP
+	    && rb->memory != V4L2_MEMORY_USERPTR)
+		return -EINVAL;
+	if (rb->count == 0)
+		return -EINVAL;
+	frsz = gspca_get_buff_size(gspca_dev);
+	if (frsz < 0)
+		return frsz;
+	ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+	if (ret < 0)
+		return ret;
+	ret = frame_alloc(gspca_dev,
+				rb->count,
+				(unsigned int) frsz,
+				rb->memory);
+	if (ret == 0)
+		rb->count = gspca_dev->nframes;
+	mutex_unlock(&gspca_dev->queue_lock);
+	PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
+	return ret;
+}
+
+static int vidioc_querybuf(struct file *file, void *priv,
+			   struct v4l2_buffer *v4l2_buf)
+{
+	struct gspca_dev *gspca_dev = priv;
+	struct gspca_frame *frame;
+
+	PDEBUG(D_STREAM, "querybuf");
+	if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
+	    || v4l2_buf->index < 0
+	    || v4l2_buf->index >= gspca_dev->nframes)
+		return -EINVAL;
+
+	frame = &gspca_dev->frame[v4l2_buf->index];
+	memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
+	return 0;
+}
+
+static int vidioc_streamon(struct file *file, void *priv,
+			   enum v4l2_buf_type buf_type)
+{
+	struct gspca_dev *gspca_dev = priv;
+	int ret;
+
+	PDEBUG(D_STREAM, "stream on");
+	if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+	ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+	if (ret < 0)
+		return ret;
+	if (!gspca_dev->present) {
+		ret = -ENODEV;
+		goto out;
+	}
+	if (gspca_dev->nframes == 0) {
+		ret = -EINVAL;
+		goto out;
+	}
+	if (!gspca_dev->streaming) {
+		ret = gspca_init_transfer(gspca_dev);
+		if (ret < 0)
+			goto out;
+	}
+#ifdef GSPCA_DEBUG
+	if (gspca_debug & D_STREAM) {
+		PDEBUG_MODE("stream on OK",
+			gspca_dev->pixfmt,
+			gspca_dev->width,
+			gspca_dev->height);
+	}
+#endif
+out:
+	mutex_unlock(&gspca_dev->queue_lock);
+	return ret;
+}
+
+static int vidioc_streamoff(struct file *file, void *priv,
+				enum v4l2_buf_type buf_type)
+{
+	struct gspca_dev *gspca_dev = priv;
+
+	PDEBUG(D_STREAM, "stream off");
+	if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+	if (gspca_dev->streaming) {
+		mutex_lock_interruptible(&gspca_dev->queue_lock);
+		gspca_stream_off(gspca_dev);
+		mutex_unlock(&gspca_dev->queue_lock);
+	}
+	return 0;
+}
+
+static int vidioc_g_jpegcomp(struct file *file, void *priv,
+			struct v4l2_jpegcompression *jpegcomp)
+{
+	struct gspca_dev *gspca_dev = priv;
+	int ret;
+
+	if (!gspca_dev->sd_desc->get_jcomp)
+		return -EINVAL;
+	mutex_lock_interruptible(&gspca_dev->usb_lock);
+	ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
+	mutex_unlock(&gspca_dev->usb_lock);
+	return ret;
+}
+
+static int vidioc_s_jpegcomp(struct file *file, void *priv,
+			struct v4l2_jpegcompression *jpegcomp)
+{
+	struct gspca_dev *gspca_dev = priv;
+	int ret;
+
+	mutex_lock_interruptible(&gspca_dev->usb_lock);
+	if (!gspca_dev->sd_desc->set_jcomp)
+		return -EINVAL;
+	ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
+	mutex_unlock(&gspca_dev->usb_lock);
+	return ret;
+}
+
+static int vidioc_g_parm(struct file *filp, void *priv,
+			struct v4l2_streamparm *parm)
+{
+	struct gspca_dev *gspca_dev = priv;
+
+	memset(parm, 0, sizeof parm);
+	parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	parm->parm.capture.readbuffers = gspca_dev->nbufread;
+	return 0;
+}
+
+static int vidioc_s_parm(struct file *filp, void *priv,
+			struct v4l2_streamparm *parm)
+{
+	struct gspca_dev *gspca_dev = priv;
+	int n;
+
+	mutex_lock_interruptible(&gspca_dev->usb_lock);
+	n = parm->parm.capture.readbuffers;
+	if (n == 0 || n > GSPCA_MAX_FRAMES)
+		parm->parm.capture.readbuffers = gspca_dev->nbufread;
+	else
+		gspca_dev->nbufread = n;
+	mutex_unlock(&gspca_dev->usb_lock);
+	return 0;
+}
+
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+static int vidiocgmbuf(struct file *file, void *priv,
+			struct video_mbuf *mbuf)
+{
+	struct gspca_dev *gspca_dev = file->private_data;
+	int i;
+
+	PDEBUG(D_STREAM, "cgmbuf");
+	if (gspca_dev->nframes == 0) {
+		struct v4l2_requestbuffers rb;
+		int ret;
+
+		memset(&rb, 0, sizeof rb);
+		rb.count = 4;
+		rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		rb.memory = V4L2_MEMORY_MMAP;
+		ret = vidioc_reqbufs(file, priv, &rb);
+		if (ret != 0)
+			return ret;
+	}
+	mbuf->frames = gspca_dev->nframes;
+	mbuf->size = gspca_dev->frsz * gspca_dev->nframes;
+	for (i = 0; i < mbuf->frames; i++)
+		mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset;
+	return 0;
+}
+#endif
+
+static int dev_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct gspca_dev *gspca_dev = file->private_data;
+	struct gspca_frame *frame = 0;
+	struct page *page;
+	unsigned long addr, start, size;
+	int i, ret;
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+	int compat = 0;
+#endif
+
+	start = vma->vm_start;
+	size = vma->vm_end - vma->vm_start;
+	PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
+
+	ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+	if (ret < 0)
+		return ret;
+/* sanity check disconnect, in use, no memory available */
+	if (!gspca_dev->present) {
+		ret = -ENODEV;
+		goto done;
+	}
+
+	for (i = 0; i < gspca_dev->nframes; ++i) {
+		if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
+			PDEBUG(D_STREAM, "mmap bad memory type");
+			break;
+		}
+		if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
+						== vma->vm_pgoff) {
+			frame = &gspca_dev->frame[i];
+			break;
+		}
+	}
+	if (frame == 0) {
+		PDEBUG(D_STREAM, "mmap no frame buffer found");
+		ret = -EINVAL;
+		goto done;
+	}
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+	if (i == 0 && size == frame->v4l2_buf.length * gspca_dev->nframes)
+		compat = 1;
+	else
+#endif
+	if (size != frame->v4l2_buf.length) {
+		PDEBUG(D_STREAM, "mmap bad size");
+		ret = -EINVAL;
+		goto done;
+	}
+
+	/*
+	 * - VM_IO marks the area as being a mmaped region for I/O to a
+	 *   device. It also prevents the region from being core dumped.
+	 */
+	vma->vm_flags |= VM_IO;
+
+	addr = (unsigned long) frame->data;
+	while (size > 0) {
+		page = vmalloc_to_page((void *) addr);
+		ret = vm_insert_page(vma, start, page);
+		if (ret < 0)
+			goto done;
+		start += PAGE_SIZE;
+		addr += PAGE_SIZE;
+		size -= PAGE_SIZE;
+	}
+
+	vma->vm_ops = &gspca_vm_ops;
+	vma->vm_private_data = frame;
+	gspca_vm_open(vma);
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+	if (compat) {
+/*fixme: ugly*/
+		for (i = 1; i < gspca_dev->nframes; ++i)
+			gspca_dev->frame[i].v4l2_buf.flags |=
+						V4L2_BUF_FLAG_MAPPED;
+	}
+#endif
+done:
+	mutex_unlock(&gspca_dev->queue_lock);
+	return ret;
+}
+
+static unsigned int dev_poll(struct file *file, poll_table * wait)
+{
+	struct gspca_dev *gspca_dev = file->private_data;
+	int i, ret;
+
+	PDEBUG(D_FRAM, "poll");
+
+	poll_wait(file, &gspca_dev->wq, wait);
+
+	if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
+		return POLLERR;
+	if (gspca_dev->dev == 0
+	    || !gspca_dev->streaming)			/* if not streaming */
+		ret = POLLERR;
+	else {
+		i = gspca_dev->fr_o;
+		i = gspca_dev->fr_queue[i];
+		if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
+			ret = POLLIN | POLLRDNORM;	/* something to read */
+		else
+			ret = 0;
+	}
+	mutex_unlock(&gspca_dev->queue_lock);
+	return ret;
+}
+
+/*
+ * wait for a video frame
+ *
+ * If a frame is ready, its index is returned.
+ */
+static int gspca_frame_wait(struct gspca_dev *gspca_dev,
+			int nonblock_ing)
+{
+	struct gspca_frame *frame;
+	int i, j, ret;
+
+	i = gspca_dev->fr_o;
+	j = gspca_dev->fr_queue[i];
+	frame = &gspca_dev->frame[j];
+	if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
+		goto ok;
+	if (nonblock_ing)			/* no frame yet */
+		return -EAGAIN;
+
+	/* wait till a frame is ready */
+	for (;;) {
+		ret = wait_event_interruptible(gspca_dev->wq,
+					atomic_read(&gspca_dev->nevent) > 0);
+		if (ret != 0)
+			return ret;
+		i = gspca_dev->fr_o;
+		j = gspca_dev->fr_queue[i];
+		frame = &gspca_dev->frame[j];
+		if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
+			break;
+	}
+
+ok:
+	atomic_dec(&gspca_dev->nevent);
+	gspca_dev->fr_o = (i + 1) % gspca_dev->nframes;
+	PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d",
+		gspca_dev->fr_q,
+		gspca_dev->fr_i,
+		gspca_dev->fr_o);
+	return j;
+}
+
+/*
+ * dequeue a video buffer
+ *
+ * If nonblock_ing is false, block until a buffer is available.
+ */
+static int vidioc_dqbuf(struct file *file, void *priv,
+			struct v4l2_buffer *v4l2_buf)
+{
+	struct gspca_dev *gspca_dev = priv;
+	struct gspca_frame *frame;
+	int i, ret;
+
+	PDEBUG(D_FRAM, "dqbuf");
+	if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
+	    || (v4l2_buf->memory != V4L2_MEMORY_MMAP
+		&& v4l2_buf->memory != V4L2_MEMORY_USERPTR))
+		return -EINVAL;
+	if (!gspca_dev->streaming)
+		return -EINVAL;
+
+	/* only one read */
+	if (mutex_lock_interruptible(&gspca_dev->read_lock))
+		return -ERESTARTSYS;
+
+	ret = gspca_frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
+	if (ret < 0)
+		goto done;
+	i = ret;				/* frame index */
+	frame = &gspca_dev->frame[i];
+	frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
+	memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
+	PDEBUG(D_FRAM, "dqbuf %d", i);
+	ret = 0;
+done:
+	mutex_unlock(&gspca_dev->read_lock);
+	return ret;
+}
+
+/*
+ * queue a video buffer
+ *
+ * Attempting to queue a buffer that has already been
+ * queued will return -EINVAL.
+ */
+static int vidioc_qbuf(struct file *file, void *priv,
+			struct v4l2_buffer *v4l2_buf)
+{
+	struct gspca_dev *gspca_dev = priv;
+	struct gspca_frame *frame;
+	int i, index, ret;
+
+	PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
+	if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	index = v4l2_buf->index;
+	if ((unsigned) index >= gspca_dev->nframes) {
+		PDEBUG(D_STREAM,
+			"qbuf idx %d >= %d", index, gspca_dev->nframes);
+		return -EINVAL;
+	}
+	frame = &gspca_dev->frame[index];
+
+	if (v4l2_buf->memory != frame->v4l2_buf.memory) {
+		PDEBUG(D_STREAM, "qbuf bad memory type");
+		return -EINVAL;
+	}
+
+	ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+	if (ret < 0)
+		return ret;
+	if (frame->v4l2_buf.flags
+			& (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)) {
+		PDEBUG(D_STREAM, "qbuf bad state");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
+	frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
+
+	if (v4l2_buf->memory == V4L2_MEMORY_USERPTR) {
+		frame->data = frame->data_end =
+				(unsigned char *) v4l2_buf->m.userptr;
+		frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
+		frame->v4l2_buf.length = v4l2_buf->length;
+	}
+
+	/* put the buffer in the 'queued' queue */
+	i = gspca_dev->fr_q;
+	gspca_dev->fr_queue[i] = index;
+	gspca_dev->fr_q = (i + 1) % gspca_dev->nframes;
+	PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d",
+		gspca_dev->fr_q,
+		gspca_dev->fr_i,
+		gspca_dev->fr_o);
+
+	v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
+	v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
+	ret = 0;
+out:
+	mutex_unlock(&gspca_dev->queue_lock);
+	return ret;
+}
+
+static ssize_t dev_read(struct file *file, char __user *data,
+		    size_t count, loff_t *ppos)
+{
+	struct gspca_dev *gspca_dev = file->private_data;
+	struct gspca_frame *frame;
+	struct v4l2_buffer v4l2_buf;
+	struct timeval timestamp;
+	int i, ret, ret2;
+
+	PDEBUG(D_FRAM, "read (%p, %d)", data, count);
+	if (gspca_dev->nframes == 0) {
+		struct v4l2_requestbuffers rb;
+
+		memset(&rb, 0, sizeof rb);
+		rb.count = gspca_dev->nbufread;
+		rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		rb.memory = V4L2_MEMORY_MMAP;
+		ret = vidioc_reqbufs(file, gspca_dev, &rb);
+		if (ret != 0) {
+			PDEBUG(D_STREAM, "read reqbuf err: %d", ret);
+			return ret;
+		}
+		memset(&v4l2_buf, 0, sizeof v4l2_buf);
+		v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		v4l2_buf.memory = V4L2_MEMORY_MMAP;
+		for (i = 0; i < gspca_dev->nbufread; i++) {
+			v4l2_buf.index = i;
+/*fixme: ugly!*/
+			gspca_dev->frame[i].v4l2_buf.flags |=
+							V4L2_BUF_FLAG_MAPPED;
+			ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
+			if (ret != 0) {
+				PDEBUG(D_STREAM, "read qbuf err: %d", ret);
+				return ret;
+			}
+		}
+	}
+	if (!gspca_dev->streaming) {
+		ret = vidioc_streamon(file, gspca_dev,
+					V4L2_BUF_TYPE_VIDEO_CAPTURE);
+		if (ret != 0) {
+			PDEBUG(D_STREAM, "read streamon err %d", ret);
+			return ret;
+		}
+	}
+
+	/* get a frame */
+	jiffies_to_timeval(get_jiffies_64(), &timestamp);
+	timestamp.tv_sec--;
+	for (i = 0; i < 2; i++) {
+		memset(&v4l2_buf, 0, sizeof v4l2_buf);
+		v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		v4l2_buf.memory = V4L2_MEMORY_MMAP;
+		ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
+		if (ret != 0) {
+			PDEBUG(D_STREAM, "read dqbuf err %d", ret);
+			return ret;
+		}
+
+		/* if the process slept for more than 1 second,
+		 * get a brand new frame */
+		frame = &gspca_dev->frame[v4l2_buf.index];
+		if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
+			break;
+		ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
+		if (ret != 0) {
+			PDEBUG(D_STREAM, "read qbuf err %d", ret);
+			return ret;
+		}
+	}
+
+	/* copy the frame */
+	if (count < frame->v4l2_buf.bytesused) {
+		PDEBUG(D_STREAM, "read bad count: %d < %d",
+			count, frame->v4l2_buf.bytesused);
+/*fixme: special errno?*/
+		ret = -EINVAL;
+		goto out;
+	}
+	count = frame->v4l2_buf.bytesused;
+	ret = copy_to_user(data, frame->data, count);
+	if (ret != 0) {
+		PDEBUG(D_ERR|D_STREAM,
+			"read cp to user lack %d / %d", ret, count);
+		ret = -EFAULT;
+		goto out;
+	}
+	ret = count;
+out:
+	/* in each case, requeue the buffer */
+	ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
+	if (ret2 != 0)
+		return ret2;
+	return ret;
+}
+
+static void gspca_dev_release(struct video_device *vfd)
+{
+	/* nothing */
+}
+
+static struct file_operations dev_fops = {
+	.owner = THIS_MODULE,
+	.open = dev_open,
+	.release = dev_close,
+	.read = dev_read,
+	.mmap = dev_mmap,
+	.ioctl = video_ioctl2,
+	.llseek = no_llseek,
+	.poll	= dev_poll,
+};
+
+static struct video_device gspca_template = {
+	.name = "gspca main driver",
+	.type = VID_TYPE_CAPTURE,
+	.fops = &dev_fops,
+	.release = gspca_dev_release,	/* mandatory */
+	.minor = -1,
+	.vidioc_querycap	= vidioc_querycap,
+	.vidioc_dqbuf		= vidioc_dqbuf,
+	.vidioc_qbuf		= vidioc_qbuf,
+	.vidioc_enum_fmt_cap	= vidioc_enum_fmt_cap,
+	.vidioc_try_fmt_cap	= vidioc_try_fmt_cap,
+	.vidioc_g_fmt_cap	= vidioc_g_fmt_cap,
+	.vidioc_s_fmt_cap	= vidioc_s_fmt_cap,
+	.vidioc_streamon	= vidioc_streamon,
+	.vidioc_queryctrl	= vidioc_queryctrl,
+	.vidioc_g_ctrl		= vidioc_g_ctrl,
+	.vidioc_s_ctrl		= vidioc_s_ctrl,
+	.vidioc_querymenu	= vidioc_querymenu,
+	.vidioc_enum_input	= vidioc_enum_input,
+	.vidioc_g_input		= vidioc_g_input,
+	.vidioc_s_input		= vidioc_s_input,
+	.vidioc_reqbufs		= vidioc_reqbufs,
+	.vidioc_querybuf	= vidioc_querybuf,
+	.vidioc_streamoff	= vidioc_streamoff,
+	.vidioc_g_jpegcomp	= vidioc_g_jpegcomp,
+	.vidioc_s_jpegcomp	= vidioc_s_jpegcomp,
+	.vidioc_g_parm		= vidioc_g_parm,
+	.vidioc_s_parm		= vidioc_s_parm,
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+	.vidiocgmbuf          = vidiocgmbuf,
+#endif
+};
+
+/*
+ * probe and create a new gspca device
+ *
+ * This function must be called by the sub-driver when it is
+ * called for probing a new device.
+ */
+int gspca_dev_probe(struct usb_interface *intf,
+		const struct usb_device_id *id,
+		const struct sd_desc *sd_desc,
+		int dev_size)
+{
+	struct usb_interface_descriptor *interface;
+	struct gspca_dev *gspca_dev;
+	struct usb_device *dev = interface_to_usbdev(intf);
+	int ret;
+	__u16 vendor;
+	__u16 product;
+
+	vendor = le16_to_cpu(dev->descriptor.idVendor);
+	product = le16_to_cpu(dev->descriptor.idProduct);
+	PDEBUG(D_PROBE, "probing %04x:%04x", vendor, product);
+
+	/* we don't handle multi-config cameras */
+	if (dev->descriptor.bNumConfigurations != 1)
+		return -ENODEV;
+	interface = &intf->cur_altsetting->desc;
+	if (interface->bInterfaceNumber > 0)
+		return -ENODEV;
+
+	/* create the device */
+	if (dev_size < sizeof *gspca_dev)
+		dev_size = sizeof *gspca_dev;
+	gspca_dev = kzalloc(dev_size, GFP_KERNEL);
+	if (gspca_dev == NULL) {
+		err("couldn't kzalloc gspca struct");
+		return -EIO;
+	}
+	gspca_dev->dev = dev;
+	gspca_dev->iface = interface->bInterfaceNumber;
+	gspca_dev->sd_desc = sd_desc;
+/*	gspca_dev->users = 0;			(done by kzalloc) */
+	gspca_dev->nbufread = 2;
+
+	/* configure the subdriver */
+	ret = gspca_dev->sd_desc->config(gspca_dev, id);
+	if (ret < 0)
+		goto out;
+	ret = gspca_set_alt0(gspca_dev);
+	if (ret < 0)
+		goto out;
+	gspca_set_default_mode(gspca_dev);
+
+	mutex_init(&gspca_dev->usb_lock);
+	mutex_init(&gspca_dev->read_lock);
+	mutex_init(&gspca_dev->queue_lock);
+	init_waitqueue_head(&gspca_dev->wq);
+
+	/* init video stuff */
+	memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
+	gspca_dev->vdev.dev = &dev->dev;
+	ret = video_register_device(&gspca_dev->vdev,
+				  VFL_TYPE_GRABBER,
+				  video_nr);
+	if (ret < 0) {
+		err("video_register_device err %d", ret);
+		goto out;
+	}
+
+	gspca_dev->present = 1;
+	usb_set_intfdata(intf, gspca_dev);
+	PDEBUG(D_PROBE, "probe ok");
+	return 0;
+out:
+	kfree(gspca_dev);
+	return ret;
+}
+EXPORT_SYMBOL(gspca_dev_probe);
+
+/*
+ * USB disconnection
+ *
+ * This function must be called by the sub-driver
+ * when the device disconnects, after the specific resources are freed.
+ */
+void gspca_disconnect(struct usb_interface *intf)
+{
+	struct gspca_dev *gspca_dev  = usb_get_intfdata(intf);
+
+	if (!gspca_dev)
+		return;
+	gspca_dev->present = 0;
+	mutex_lock_interruptible(&gspca_dev->queue_lock);
+	mutex_lock_interruptible(&gspca_dev->usb_lock);
+	gspca_kill_transfer(gspca_dev);
+	mutex_unlock(&gspca_dev->queue_lock);
+	mutex_unlock(&gspca_dev->usb_lock);
+	while (gspca_dev->users != 0) {		/* wait until fully closed */
+		atomic_inc(&gspca_dev->nevent);
+		wake_up_interruptible(&gspca_dev->wq);	/* wake processes */
+		schedule();
+	}
+/* We don't want people trying to open up the device */
+	video_unregister_device(&gspca_dev->vdev);
+/* Free the memory */
+	kfree(gspca_dev);
+	PDEBUG(D_PROBE, "disconnect complete");
+}
+EXPORT_SYMBOL(gspca_disconnect);
+
+/* -- module insert / remove -- */
+static int __init gspca_init(void)
+{
+	info("main v%s registered", version);
+	return 0;
+}
+static void __exit gspca_exit(void)
+{
+	info("main deregistered");
+}
+
+module_init(gspca_init);
+module_exit(gspca_exit);
+
+module_param_named(debug, gspca_debug, int, 0644);
+MODULE_PARM_DESC(debug,
+		"Debug (bit) 0x01:error 0x02:probe 0x04:config"
+		" 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout");
+
+module_param(comp_fac, int, 0644);
+MODULE_PARM_DESC(comp_fac,
+		"Buffer size ratio when compressed in percent");
diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
new file mode 100644
index 0000000..1394ab1
--- /dev/null
+++ b/drivers/media/video/gspca/gspca.h
@@ -0,0 +1,178 @@
+#ifndef GSPCAV2_H
+#define GSPCAV2_H
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/usb.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <linux/mutex.h>
+
+#ifdef GSPCA_DEBUG
+/* GSPCA our debug messages */
+extern int gspca_debug;
+#define PDEBUG(level, fmt, args...) \
+	do {\
+		if (gspca_debug & (level)) \
+			printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
+	} while (0)
+#define D_ERR  0x01
+#define D_PROBE 0x02
+#define D_CONF 0x04
+#define D_STREAM 0x08
+#define D_FRAM 0x10
+#define D_PACK 0x20
+#define D_USBI 0x40
+#define D_USBO 0x80
+#else
+#define PDEBUG(level, fmt, args...)
+#endif
+#undef err
+#define err(fmt, args...) \
+	do {\
+		printk(KERN_ERR MODULE_NAME ": " fmt "\n", ## args); \
+	} while (0)
+#undef info
+#define info(fmt, args...) \
+	do {\
+		printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
+	} while (0)
+#undef warn
+#define warn(fmt, args...) \
+	do {\
+		printk(KERN_WARNING MODULE_NAME ": " fmt "\n", ## args); \
+	} while (0)
+
+#define GSPCA_MAX_FRAMES 16	/* maximum number of video frame buffers */
+/* ISOC transfers */
+#define NURBS 4			/* number of URBs */
+#define ISO_MAX_PKT 32		/* max number of packets in an ISOC transfer */
+#define ISO_MAX_SIZE 0x10000	/* max size of one URB buffer (64 Kb) */
+
+/* device information - set at probe time */
+struct cam_mode {
+	__u32 pixfmt;
+	short width;
+	short height;
+	short mode;		/* subdriver value */
+	short reserved;		/* subdriver value */
+};
+struct cam {
+	char *dev_name;
+	struct cam_mode *cam_mode;	/* size nmodes */
+	char nmodes;
+	__u8 epaddr;
+};
+
+struct gspca_dev;
+struct gspca_frame;
+
+/* subdriver operations */
+typedef int (*cam_op) (struct gspca_dev *);
+typedef void (*cam_v_op) (struct gspca_dev *);
+typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
+typedef int (*cam_jpg_op) (struct gspca_dev *,
+				struct v4l2_jpegcompression *);
+typedef int (*cam_qmnu_op) (struct gspca_dev *,
+			struct v4l2_querymenu *);
+typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
+				struct gspca_frame *frame,
+				unsigned char *data,
+				int len);
+
+struct ctrl {
+	struct v4l2_queryctrl qctrl;
+	int (*set)(struct gspca_dev *, __s32);
+	int (*get)(struct gspca_dev *, __s32 *);
+};
+
+/* subdriver description */
+struct sd_desc {
+/* information */
+	char *name;			/* sub-driver name */
+/* controls */
+	struct ctrl *ctrls;
+	int nctrls;
+/* operations */
+	cam_cf_op config;		/* called on probe */
+	cam_op open;			/* called on open */
+	cam_v_op start;			/* called on stream on */
+	cam_v_op stopN;			/* called on stream off - main alt */
+	cam_v_op stop0;			/* called on stream off - alt 0 */
+	cam_v_op close;			/* called on close */
+	cam_pkt_op pkt_scan;
+	cam_jpg_op get_jcomp;
+	cam_jpg_op set_jcomp;
+	cam_qmnu_op querymenu;
+};
+
+struct gspca_pktbuf {
+	char *data;
+	struct urb *urb;
+};
+
+/* packet types when moving from iso buf to frame buf */
+#define DISCARD_PACKET	0
+#define FIRST_PACKET	1
+#define INTER_PACKET	2
+#define LAST_PACKET	3
+
+struct gspca_frame {
+	unsigned char *data;		/* frame buffer */
+	unsigned char *data_end;	/* current end of frame while filling */
+	int vma_use_count;
+	struct v4l2_buffer v4l2_buf;
+};
+
+struct gspca_dev {
+	struct video_device vdev;		/* !! must be the first item */
+	struct usb_device *dev;
+
+	struct cam cam;				/* device information */
+	const struct sd_desc *sd_desc;		/* subdriver description */
+
+	struct gspca_pktbuf pktbuf[NURBS];
+
+	__u8 *frbuf;				/* buffer for nframes */
+	struct gspca_frame frame[GSPCA_MAX_FRAMES];
+	unsigned int frsz;			/* frame size */
+	char nframes;				/* number of frames */
+	char fr_i;				/* frame being filled */
+	char fr_q;				/* next frame to queue */
+	char fr_o;				/* next frame to dequeue */
+	signed char fr_queue[GSPCA_MAX_FRAMES];	/* frame queue */
+	char last_packet_type;
+
+	__u8 iface;			/* USB interface number */
+	__u8 alt;			/* USB alternate setting */
+	char curr_mode;			/* current camera mode */
+	__u32 pixfmt;			/* current mode parameters */
+	short width;
+	short height;
+
+	atomic_t nevent;		/* number of frames done */
+	wait_queue_head_t wq;		/* wait queue */
+	struct mutex usb_lock;		/* usb exchange protection */
+	struct mutex read_lock;		/* read protection */
+	struct mutex queue_lock;	/* ISOC queue protection */
+	__u32 sequence;			/* frame sequence number */
+	signed char streaming;
+	char users;			/* # open */
+	char present;			/* device connected */
+	char nbufread;			/* number of buffers for read() */
+};
+
+int gspca_dev_probe(struct usb_interface *intf,
+		const struct usb_device_id *id,
+		const struct sd_desc *sd_desc,
+		int dev_size);
+int gspca_dev_init(struct gspca_dev *gspca_dev,
+		   struct usb_interface *intf);
+void gspca_disconnect(struct usb_interface *intf);
+struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
+				    int packet_type,
+				    struct gspca_frame *frame,
+				    unsigned char *data,
+				    int len);
+#endif /* GSPCAV2_H */
diff --git a/drivers/media/video/gspca/jpeg.h b/drivers/media/video/gspca/jpeg.h
new file mode 100644
index 0000000..c4087c0
--- /dev/null
+++ b/drivers/media/video/gspca/jpeg.h
@@ -0,0 +1,301 @@
+#ifndef JPEG_H
+#define JPEG_H 1
+/*
+ * Insert a JPEG header at start of frame
+ *
+ * This module is used by the gspca subdrivers.
+ * A special case is done for Conexant webcams.
+ *
+ * Copyright (C) Jean-Francois Moine (http://moinejf.free.fr)
+ *
+ * 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
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/* start of jpeg frame + quantization table */
+static const unsigned char quant[][0x88] = {
+/* index 0 - Q40*/
+    {
+	0xff, 0xd8,			/* jpeg */
+	0xff, 0xdb, 0x00, 0x84,		/* DQT */
+0,					/* quantization table part 1 */
+     20, 14, 15, 18, 15, 13, 20, 18, 16, 18, 23, 21, 20, 24, 30, 50,
+     33, 30, 28, 28, 30, 61, 44, 46, 36, 50, 73, 64, 76, 75, 71, 64,
+     70, 69, 80, 90, 115, 98, 80, 85, 109, 86, 69, 70, 100, 136, 101,
+     109,
+     119, 123, 129, 130, 129, 78, 96, 141, 151, 140, 125, 150, 115,
+     126, 129, 124,
+1,					/* quantization table part 2 */
+     21, 23, 23, 30, 26, 30, 59, 33, 33, 59, 124, 83, 70, 83, 124, 124,
+     124, 124, 124, 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+     124, 124, 124,
+     124, 124, 124, 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+     124, 124, 124,
+     124, 124, 124, 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+     124, 124, 124},
+/* index 1 - Q50 */
+    {
+	0xff, 0xd8,
+	0xff, 0xdb, 0x00, 0x84,		/* DQT */
+0,
+     16, 11, 12, 14, 12, 10, 16, 14, 13, 14, 18, 17, 16, 19, 24, 40,
+     26, 24, 22, 22, 24, 49, 35, 37, 29, 40, 58, 51, 61, 60, 57, 51,
+     56, 55, 64, 72, 92, 78, 64, 68, 87, 69, 55, 56, 80, 109, 81, 87,
+     95, 98, 103, 104, 103, 62, 77, 113, 121, 112, 100, 120, 92, 101,
+     103, 99,
+1,
+    17, 18, 18, 24, 21, 24, 47, 26, 26, 47, 99, 66, 56, 66, 99, 99,
+     99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
+     99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
+     99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99},
+/* index 2 Q60 */
+    {
+	0xff, 0xd8,
+	0xff, 0xdb, 0x00, 0x84,		/* DQT */
+0,
+     13, 9, 10, 11, 10, 8, 13, 11, 10, 11, 14, 14, 13, 15, 19, 32,
+     21, 19, 18, 18, 19, 39, 28, 30, 23, 32, 46, 41, 49, 48, 46, 41,
+     45, 44, 51, 58, 74, 62, 51, 54, 70, 55, 44, 45, 64, 87, 65, 70,
+     76, 78, 82, 83, 82, 50, 62, 90, 97, 90, 80, 96, 74, 81, 82, 79,
+1,
+     14, 14, 14, 19, 17, 19, 38, 21, 21, 38, 79, 53, 45, 53, 79, 79,
+     79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79,
+     79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79,
+     79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79},
+/* index 3 - Q70 */
+    {
+	0xff, 0xd8,
+	0xff, 0xdb, 0x00, 0x84,		/* DQT */
+0,
+     10, 7, 7, 8, 7, 6, 10, 8, 8, 8, 11, 10, 10, 11, 14, 24,
+     16, 14, 13, 13, 14, 29, 21, 22, 17, 24, 35, 31, 37, 36, 34, 31,
+     34, 33, 38, 43, 55, 47, 38, 41, 52, 41, 33, 34, 48, 65, 49, 52,
+     57, 59, 62, 62, 62, 37, 46, 68, 73, 67, 60, 72, 55, 61, 62, 59,
+1,
+     10, 11, 11, 14, 13, 14, 28, 16, 16, 28, 59, 40, 34, 40, 59, 59,
+     59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59,
+     59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59,
+     59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59},
+/* index 4 - Q80 */
+    {
+	0xff, 0xd8,
+	0xff, 0xdb, 0x00, 0x84,		/* DQT */
+0,
+      6, 4, 5, 6, 5, 4, 6, 6, 5, 6, 7, 7, 6, 8, 10, 16,
+     10, 10, 9, 9, 10, 20, 14, 15, 12, 16, 23, 20, 24, 24, 23, 20,
+     22, 22, 26, 29, 37, 31, 26, 27, 35, 28, 22, 22, 32, 44, 32, 35,
+     38, 39, 41, 42, 41, 25, 31, 45, 48, 45, 40, 48, 37, 40, 41, 40,
+1,
+      7, 7, 7, 10, 8, 10, 19, 10, 10, 19, 40, 26, 22, 26, 40, 40,
+     40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
+     40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
+     40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40},
+/* index 5 - Q85 */
+    {
+	0xff, 0xd8,
+	0xff, 0xdb, 0x00, 0x84,		/* DQT */
+0,
+     5, 3, 4, 4, 4, 3, 5, 4, 4, 4, 5, 5, 5, 6, 7, 12,
+     8, 7, 7, 7, 7, 15, 11, 11, 9, 12, 17, 15, 18, 18, 17, 15,
+     17, 17, 19, 22, 28, 23, 19, 20, 26, 21, 17, 17, 24, 33, 24, 26,
+     29, 29, 31, 31, 31, 19, 23, 34, 36, 34, 30, 36, 28, 30, 31, 30,
+1,
+     5, 5, 5, 7, 6, 7, 14, 8, 8, 14, 30, 20, 17, 20, 30, 30,
+     30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30,
+     30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30,
+     30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30},
+/* index 6 - 86 */
+{
+	0xff, 0xd8,
+	0xff, 0xdb, 0x00, 0x84,		/* DQT */
+0,
+	0x04, 0x03, 0x03, 0x04, 0x03, 0x03, 0x04, 0x04,
+	0x04, 0x04, 0x05, 0x05, 0x04, 0x05, 0x07, 0x0B,
+	0x07, 0x07, 0x06, 0x06, 0x07, 0x0E, 0x0A, 0x0A,
+	0x08, 0x0B, 0x10, 0x0E, 0x11, 0x11, 0x10, 0x0E,
+	0x10, 0x0F, 0x12, 0x14, 0x1A, 0x16, 0x12, 0x13,
+	0x18, 0x13, 0x0F, 0x10, 0x16, 0x1F, 0x17, 0x18,
+	0x1B, 0x1B, 0x1D, 0x1D, 0x1D, 0x11, 0x16, 0x20,
+	0x22, 0x1F, 0x1C, 0x22, 0x1A, 0x1C, 0x1D, 0x1C,
+1,
+	0x05, 0x05, 0x05, 0x07, 0x06, 0x07, 0x0D, 0x07,
+	0x07, 0x0D, 0x1C, 0x12, 0x10, 0x12, 0x1C, 0x1C,
+	0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C,
+	0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C,
+	0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C,
+	0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C,
+	0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C,
+	0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C,
+ },
+/* index 7 - 88 */
+{
+	0xff, 0xd8,
+	0xff, 0xdb, 0x00, 0x84,		/* DQT */
+0,
+	0x04, 0x03, 0x03, 0x03, 0x03, 0x02, 0x04, 0x03,
+	0x03, 0x03, 0x04, 0x04, 0x04, 0x05, 0x06, 0x0A,
+	0x06, 0x06, 0x05, 0x05, 0x06, 0x0C, 0x08, 0x09,
+	0x07, 0x0A, 0x0E, 0x0C, 0x0F, 0x0E, 0x0E, 0x0C,
+	0x0D, 0x0D, 0x0F, 0x11, 0x16, 0x13, 0x0F, 0x10,
+	0x15, 0x11, 0x0D, 0x0D, 0x13, 0x1A, 0x13, 0x15,
+	0x17, 0x18, 0x19, 0x19, 0x19, 0x0F, 0x12, 0x1B,
+	0x1D, 0x1B, 0x18, 0x1D, 0x16, 0x18, 0x19, 0x18,
+1,
+	0x04, 0x04, 0x04, 0x06, 0x05, 0x06, 0x0B, 0x06,
+	0x06, 0x0B, 0x18, 0x10, 0x0D, 0x10, 0x18, 0x18,
+	0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+	0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+	0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+	0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+	0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+	0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+},
+/* index 8 - ?? */
+{
+	0xff, 0xd8,
+	0xff, 0xdb, 0x00, 0x84,		/* DQT */
+0,
+	0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+	0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x03, 0x05,
+	0x03, 0x03, 0x03, 0x03, 0x03, 0x06, 0x04, 0x05,
+	0x04, 0x05, 0x07, 0x06, 0x08, 0x08, 0x07, 0x06,
+	0x07, 0x07, 0x08, 0x09, 0x0C, 0x0A, 0x08, 0x09,
+	0x0B, 0x09, 0x07, 0x07, 0x0A, 0x0E, 0x0A, 0x0B,
+	0x0C, 0x0C, 0x0D, 0x0D, 0x0D, 0x08, 0x0A, 0x0E,
+	0x0F, 0x0E, 0x0D, 0x0F, 0x0C, 0x0D, 0x0D, 0x0C,
+1,
+	0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x06, 0x03,
+	0x03, 0x06, 0x0C, 0x08, 0x07, 0x08, 0x0C, 0x0C,
+	0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C,
+	0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C,
+	0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C,
+	0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C,
+	0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C,
+	0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C
+}
+};
+
+/* huffman table + start of SOF0 */
+static unsigned char huffman[] = {
+	0xff, 0xc4, 0x01, 0xa2,
+	0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01,
+	0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
+	0x07, 0x08, 0x09, 0x0a, 0x0b, 0x01, 0x00, 0x03,
+	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+	0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+	0x0a, 0x0b, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03,
+	0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00,
+	0x00, 0x01, 0x7d, 0x01, 0x02, 0x03, 0x00, 0x04,
+	0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13,
+	0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81,
+	0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1, 0x15,
+	0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62, 0x72, 0x82,
+	0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25,
+	0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36,
+	0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46,
+	0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56,
+	0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66,
+	0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76,
+	0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 0x86,
+	0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95,
+	0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4,
+	0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3,
+	0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2,
+	0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca,
+	0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9,
+	0xda, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
+	0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5,
+	0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0x11, 0x00, 0x02,
+	0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
+	0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01,
+	0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06,
+	0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22,
+	0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1,
+	0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62,
+	0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25,
+	0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 0x27, 0x28,
+	0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a,
+	0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
+	0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a,
+	0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a,
+	0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a,
+	0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
+	0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
+	0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+	0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
+	0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
+	0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
+	0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2, 0xe3,
+	0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2,
+	0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa,
+#ifdef CONEX_CAM
+/* the Conexant frames start with SOF0 */
+#else
+	0xff, 0xc0, 0x00, 0x11,		/* SOF0 (start of frame 0 */
+	0x08,				/* data precision */
+#endif
+};
+
+#ifndef CONEX_CAM
+/* variable part:
+ *	0x01, 0xe0,			 height
+ *	0x02, 0x80,			 width
+ *	0x03,				 component number
+ *		0x01,
+ *			0x21,			samples Y
+ */
+
+/* end of header */
+static unsigned char eoh[] = {
+			0x00,		/* quant Y */
+		0x02, 0x11, 0x01,	/* samples CbCr - quant CbCr */
+		0x03, 0x11, 0x01,
+
+	0xff, 0xda, 0x00, 0x0c,		/* SOS (start of scan */
+	0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00
+};
+#endif
+
+/* -- output the JPEG header -- */
+static void jpeg_put_header(struct gspca_dev *gspca_dev,
+			    struct gspca_frame *frame,
+			    int qindex,
+			    int samplesY)
+{
+#ifndef CONEX_CAM
+	unsigned char tmpbuf[8];
+#endif
+
+	gspca_frame_add(gspca_dev, FIRST_PACKET, frame,
+			(unsigned char *) quant[qindex], sizeof quant[0]);
+	gspca_frame_add(gspca_dev, INTER_PACKET, frame,
+			(unsigned char *) huffman, sizeof huffman);
+#ifndef CONEX_CAM
+	tmpbuf[0] = gspca_dev->height >> 8;
+	tmpbuf[1] = gspca_dev->height & 0xff;
+	tmpbuf[2] = gspca_dev->width >> 8;
+	tmpbuf[3] = gspca_dev->width & 0xff;
+	tmpbuf[4] = 0x03;		/* component number */
+	tmpbuf[5] = 0x01;		/* first component */
+	tmpbuf[6] = samplesY;
+	gspca_frame_add(gspca_dev, INTER_PACKET, frame,
+			tmpbuf, 7);
+	gspca_frame_add(gspca_dev, INTER_PACKET, frame,
+			eoh, sizeof eoh);
+#endif
+}
+#endif
diff --git a/drivers/media/video/gspca/stk014.c b/drivers/media/video/gspca/stk014.c
new file mode 100644
index 0000000..8fd4ff01
--- /dev/null
+++ b/drivers/media/video/gspca/stk014.c
@@ -0,0 +1,562 @@
+/*
+ * Syntek DV4000 (STK014) subdriver
+ *
+ * Copyright (C) Jean-Francois Moine (http://moinejf.free.fr)
+ *
+ * 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
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#define MODULE_NAME "stk014"
+
+#include "gspca.h"
+#include "jpeg.h"
+
+#define DRIVER_VERSION_NUMBER	KERNEL_VERSION(0, 0, 22)
+static const char version[] = "0.0.22";
+
+MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
+MODULE_DESCRIPTION("Syntek DV4000 (STK014) USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+/* specific webcam descriptor */
+struct sd {
+	struct gspca_dev gspca_dev;	/* !! must be the first item */
+
+	unsigned char brightness;
+	unsigned char contrast;
+	unsigned char colors;
+};
+
+/* global parameters */
+static int lightfreq = 50;
+static int sd_quant = 7;		/* <= 4 KO - 7: good (enough!) */
+
+/* V4L2 controls supported by the driver */
+static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_setcolors(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getcolors(struct gspca_dev *gspca_dev, __s32 *val);
+
+static struct ctrl sd_ctrls[] = {
+#define SD_BRIGHTNESS 0
+	{
+	    {
+		.id      = V4L2_CID_BRIGHTNESS,
+		.type    = V4L2_CTRL_TYPE_INTEGER,
+		.name    = "Brightness",
+		.minimum = 0,
+		.maximum = 255,
+		.step    = 1,
+		.default_value = 127,
+	    },
+	    .set = sd_setbrightness,
+	    .get = sd_getbrightness,
+	},
+#define SD_CONTRAST 1
+	{
+	    {
+		.id      = V4L2_CID_CONTRAST,
+		.type    = V4L2_CTRL_TYPE_INTEGER,
+		.name    = "Contrast",
+		.minimum = 0,
+		.maximum = 255,
+		.step    = 1,
+		.default_value = 127,
+	    },
+	    .set = sd_setcontrast,
+	    .get = sd_getcontrast,
+	},
+#define SD_COLOR 2
+	{
+	    {
+		.id      = V4L2_CID_SATURATION,
+		.type    = V4L2_CTRL_TYPE_INTEGER,
+		.name    = "Saturation",
+		.minimum = 0,
+		.maximum = 255,
+		.step    = 1,
+		.default_value = 127,
+	    },
+	    .set = sd_setcolors,
+	    .get = sd_getcolors,
+	},
+};
+
+static struct cam_mode vga_mode[] = {
+	{V4L2_PIX_FMT_JPEG, 320, 240},
+	{V4L2_PIX_FMT_JPEG, 640, 480},
+};
+
+/* -- read a register -- */
+static int reg_read(struct gspca_dev *gspca_dev,
+			__u16 index, __u8 *buf)
+{
+	int ret;
+	struct usb_device *dev = gspca_dev->dev;
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			0x00,
+			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			0x00,
+			index,
+			buf, 1,
+			500);
+	if (ret < 0)
+		PDEBUG(D_ERR, "reg_read err %d", ret);
+	return ret;
+}
+
+/* -- write a register -- */
+static int reg_write(struct gspca_dev *gspca_dev,
+			__u16 index, __u16 value)
+{
+	struct usb_device *dev = gspca_dev->dev;
+	int ret;
+
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			0x01,
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			value,
+			index,
+			NULL,
+			0,
+			500);
+	if (ret < 0)
+		PDEBUG(D_ERR, "reg_write err %d", ret);
+	return ret;
+}
+
+/* -- get a value -- */
+static int rcv_val(struct gspca_dev *gspca_dev,
+			int ads,
+			int len)
+{
+	struct usb_device *dev = gspca_dev->dev;
+	int alen, ret;
+	unsigned char bulk_buf[4];
+
+	reg_write(gspca_dev, 0x634, (ads >> 16) & 0xff);
+	reg_write(gspca_dev, 0x635, (ads >> 8) & 0xff);
+	reg_write(gspca_dev, 0x636, ads & 0xff);
+	reg_write(gspca_dev, 0x637, 0);
+	reg_write(gspca_dev, 0x638, len & 0xff);
+	reg_write(gspca_dev, 0x639, len >> 8);
+	reg_write(gspca_dev, 0x63a, 0);
+	reg_write(gspca_dev, 0x63b, 0);
+	reg_write(gspca_dev, 0x630, 5);
+	if (len > sizeof bulk_buf)
+		return -1;
+	ret = usb_bulk_msg(dev,
+			usb_rcvbulkpipe(dev, 5),
+			bulk_buf,
+			len,
+			&alen,
+			500);	/* timeout in milliseconds */
+	return ret;
+}
+
+/* -- send a value -- */
+static int snd_val(struct gspca_dev *gspca_dev,
+			int ads,
+			unsigned int val)
+{
+	struct usb_device *dev = gspca_dev->dev;
+	int alen, ret;
+	__u8 value, seq;
+	unsigned char bulk_buf[4];
+
+	if (ads == 0x003f08) {
+		ret = reg_read(gspca_dev, 0x0704, &value);
+		if (ret < 0)
+			goto ko;
+		ret = reg_read(gspca_dev, 0x0705, &seq);
+		if (ret < 0)
+			goto ko;
+		ret = reg_read(gspca_dev, 0x0650, &value);
+		if (ret < 0)
+			goto ko;
+		reg_write(gspca_dev, 0x654, seq);
+	} else
+		reg_write(gspca_dev, 0x654, (ads >> 16) & 0xff);
+	reg_write(gspca_dev, 0x655, (ads >> 8) & 0xff);
+	reg_write(gspca_dev, 0x656, ads & 0xff);
+	reg_write(gspca_dev, 0x657, 0);
+	reg_write(gspca_dev, 0x658, 0x04);	/* size */
+	reg_write(gspca_dev, 0x659, 0);
+	reg_write(gspca_dev, 0x65a, 0);
+	reg_write(gspca_dev, 0x65b, 0);
+	reg_write(gspca_dev, 0x650, 5);
+	bulk_buf[0] = (val >> 24) & 0xff;
+	bulk_buf[1] = (val >> 16) & 0xff;
+	bulk_buf[2] = (val >> 8) & 0xff;
+	bulk_buf[3] = val & 0xff;
+	ret = usb_bulk_msg(dev,
+			usb_sndbulkpipe(dev, 6),
+			bulk_buf,
+			4,
+			&alen,
+			500);	/* timeout in milliseconds */
+	if (ret < 0)
+		goto ko;
+	if (ads == 0x003f08) {
+		seq += 4;
+		seq &= 0x3f;
+		reg_write(gspca_dev, 0x705, seq);
+	}
+	return ret;
+ko:
+	PDEBUG(D_ERR, "snd_val err %d", ret);
+	return ret;
+}
+
+/* set a camera parameter */
+static int set_par(struct gspca_dev *gspca_dev,
+		   int parval)
+{
+	return snd_val(gspca_dev, 0x003f08, parval);
+}
+
+static void setbrightness(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	int parval;
+
+	PDEBUG(D_CONF, "brightness: %d", sd->brightness);
+	parval = 0x06000000		/* whiteness */
+		+ (sd->brightness << 16);
+	set_par(gspca_dev, parval);
+}
+
+static void setcontrast(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	int parval;
+
+	PDEBUG(D_CONF, "contrast: %d", sd->contrast);
+	parval = 0x07000000		/* contrast */
+		+ (sd->contrast << 16);
+	set_par(gspca_dev, parval);
+}
+
+static void setcolors(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	int parval;
+
+	PDEBUG(D_CONF, "saturation: %d",
+		sd->colors);
+	parval = 0x08000000		/* saturation */
+		+ (sd->colors << 16);
+	set_par(gspca_dev, parval);
+}
+
+/* this function is called at probe time */
+static int sd_config(struct gspca_dev *gspca_dev,
+			const struct usb_device_id *id)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	struct cam *cam = &gspca_dev->cam;
+
+	cam->dev_name = (char *) id->driver_info;
+	cam->epaddr = 0x02;
+	gspca_dev->cam.cam_mode = vga_mode;
+	gspca_dev->cam.nmodes = sizeof vga_mode / sizeof vga_mode[0];
+	sd->brightness = sd_ctrls[SD_BRIGHTNESS].qctrl.default_value;
+	sd->contrast = sd_ctrls[SD_CONTRAST].qctrl.default_value;
+	sd->colors = sd_ctrls[SD_COLOR].qctrl.default_value;
+	return 0;
+}
+
+/* this function is called at open time */
+static int sd_open(struct gspca_dev *gspca_dev)
+{
+	__u8 value;
+	int ret;
+
+	/* check if the device responds */
+	usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
+	ret = reg_read(gspca_dev, 0x0740, &value);
+	if (ret < 0)
+		return ret;
+	if (value != 0xff) {
+		PDEBUG(D_ERR|D_STREAM, "init reg: 0x%02x", value);
+		return -1;
+	}
+	return 0;
+}
+
+/* -- start the camera -- */
+static void sd_start(struct gspca_dev *gspca_dev)
+{
+	__u8 dum;
+	int ret, value;
+
+	/* work on alternate 1 */
+	usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
+
+	set_par(gspca_dev, 0x10000000);
+	set_par(gspca_dev, 0x00000000);
+	set_par(gspca_dev, 0x8002e001);
+	set_par(gspca_dev, 0x14000000);
+	if (gspca_dev->width > 320)
+		value = 0x8002e001;		/* 640x480 */
+	else
+		value = 0x4001f000;		/* 320x240 */
+	set_par(gspca_dev, value);
+	ret = usb_set_interface(gspca_dev->dev,
+					gspca_dev->iface,
+					gspca_dev->alt);
+	if (ret < 0)
+		goto out;
+	ret = reg_read(gspca_dev, 0x0630, &dum);
+	if (ret < 0)
+		goto out;
+	rcv_val(gspca_dev, 0x000020, 4);	/* << (value ff ff ff ff) */
+	ret = reg_read(gspca_dev, 0x0650, &dum);
+	if (ret < 0)
+		goto out;
+	snd_val(gspca_dev, 0x000020, 0xffffffff);
+	reg_write(gspca_dev, 0x0620, 0);
+	reg_write(gspca_dev, 0x0630, 0);
+	reg_write(gspca_dev, 0x0640, 0);
+	reg_write(gspca_dev, 0x0650, 0);
+	reg_write(gspca_dev, 0x0660, 0);
+	setbrightness(gspca_dev);		/* whiteness */
+	setcontrast(gspca_dev);			/* contrast */
+	setcolors(gspca_dev);			/* saturation */
+	set_par(gspca_dev, 0x09800000);		/* Red ? */
+	set_par(gspca_dev, 0x0a800000);		/* Green ? */
+	set_par(gspca_dev, 0x0b800000);		/* Blue ? */
+	set_par(gspca_dev, 0x0d030000);		/* Gamma ? */
+	set_par(gspca_dev, lightfreq == 60
+			? 0x33780000		/* 60 Hz */
+			: 0x33640000);		/* 50 Hz */
+
+	/* start the video flow */
+	set_par(gspca_dev, 0x01000000);
+	set_par(gspca_dev, 0x01000000);
+	PDEBUG(D_STREAM, "camera started alt: 0x%02x", gspca_dev->alt);
+	return;
+out:
+	PDEBUG(D_ERR|D_STREAM, "camera start err %d", ret);
+}
+
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+	struct usb_device *dev = gspca_dev->dev;
+	__u8 value;
+
+	set_par(gspca_dev, 0x02000000);
+	set_par(gspca_dev, 0x02000000);
+	usb_set_interface(dev, gspca_dev->iface, 1);
+	reg_read(gspca_dev, 0x0630, &value);
+	rcv_val(gspca_dev, 0x000020, 4);	/* << (value ff ff ff ff) */
+	reg_read(gspca_dev, 0x0650, &value);
+	snd_val(gspca_dev, 0x000020, 0xffffffff);
+	reg_write(gspca_dev, 0x0620, 0);
+	reg_write(gspca_dev, 0x0630, 0);
+	reg_write(gspca_dev, 0x0640, 0);
+	reg_write(gspca_dev, 0x0650, 0);
+	reg_write(gspca_dev, 0x0660, 0);
+	PDEBUG(D_STREAM, "camera stopped");
+}
+
+static void sd_stop0(struct gspca_dev *gspca_dev)
+{
+}
+
+static void sd_close(struct gspca_dev *gspca_dev)
+{
+}
+
+static void sd_pkt_scan(struct gspca_dev *gspca_dev,
+			struct gspca_frame *frame,	/* target */
+			unsigned char *data,		/* isoc packet */
+			int len)			/* iso packet length */
+{
+	int l;
+
+	/* a frame starts with:
+	 *	- 0xff 0xfe
+	 *	- 0x08 0x00	// length (little endian ?!)
+	 *	- 4 bytes = size of whole frame (big endian - including header)
+	 *	- 0x00 0x0c
+	 *	- 0xff 0xd8
+	 *	- ..	JPEG image with escape sequences (ff 00)
+	 */
+	if (data[0] == 0xff && data[1] == 0xfe) {
+		if (gspca_dev->last_packet_type == INTER_PACKET) {
+			PDEBUG(D_ERR|D_FRAM, "sof actual l: %d init l: %d",
+				frame->data_end - frame->data,
+				frame->v4l2_buf.bytesused);
+		}
+
+		/* put the JPEG headaer */
+		jpeg_put_header(gspca_dev, frame, sd_quant, 0x22);
+
+		/* beginning of the frame */
+#define STKHDRSZ 12
+		l = (data[4] << 24)		/* frame size */
+			+ (data[5] << 16)
+			+ (data[6] << 8)
+			+ data[7]
+			- STKHDRSZ
+			+ (frame->data_end - frame->data)
+			+ 2;			/* EOF (ff d9) */
+		gspca_frame_add(gspca_dev, INTER_PACKET, frame,
+				data + STKHDRSZ, len - STKHDRSZ);
+#undef STKHDRSZ
+		frame->v4l2_buf.bytesused = l;
+		return;
+	}
+	if (gspca_dev->last_packet_type != INTER_PACKET) {
+		if (gspca_dev->last_packet_type == LAST_PACKET) {
+			PDEBUG(D_ERR|D_PACK, "mof actual l: %d init l: %d",
+				frame->data_end - frame->data,
+				frame->v4l2_buf.bytesused);
+		}
+		return;
+	}
+
+	/* intermediate packet */
+	l = frame->data_end - frame->data;
+	if (len < frame->v4l2_buf.bytesused - 2 - l) {
+		gspca_frame_add(gspca_dev, INTER_PACKET, frame,
+				data, len);
+		return;
+	}
+
+	/* last packet */
+	if (len > frame->v4l2_buf.bytesused - 2 - l)
+		len = frame->v4l2_buf.bytesused - 2 - l;
+	gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
+	gspca_frame_add(gspca_dev, LAST_PACKET, frame, "\xff\xd9", 2);
+}
+
+static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	sd->brightness = val;
+	if (gspca_dev->streaming)
+		setbrightness(gspca_dev);
+	return 0;
+}
+
+static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	*val = sd->brightness;
+	return 0;
+}
+
+static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	sd->contrast = val;
+	if (gspca_dev->streaming)
+		setcontrast(gspca_dev);
+	return 0;
+}
+
+static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	*val = sd->contrast;
+	return 0;
+}
+
+static int sd_setcolors(struct gspca_dev *gspca_dev, __s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	sd->colors = val;
+	if (gspca_dev->streaming)
+		setcolors(gspca_dev);
+	return 0;
+}
+
+static int sd_getcolors(struct gspca_dev *gspca_dev, __s32 *val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	*val = sd->colors;
+	return 0;
+}
+
+/* sub-driver description */
+static struct sd_desc sd_desc = {
+	.name = MODULE_NAME,
+	.ctrls = sd_ctrls,
+	.nctrls = sizeof sd_ctrls / sizeof sd_ctrls[0],
+	.config = sd_config,
+	.open = sd_open,
+	.start = sd_start,
+	.stopN = sd_stopN,
+	.stop0 = sd_stop0,
+	.close = sd_close,
+	.pkt_scan = sd_pkt_scan,
+};
+
+/* -- module initialisation -- */
+#define DVNM(name) .driver_info = (kernel_ulong_t) name
+static __devinitdata struct usb_device_id device_table[] = {
+	{USB_DEVICE(0x05e1, 0x0893), DVNM("Syntek DV4000")},
+	{}
+};
+MODULE_DEVICE_TABLE(usb, device_table);
+
+/* -- device connect -- */
+static int sd_probe(struct usb_interface *intf,
+			const struct usb_device_id *id)
+{
+	PDEBUG(D_PROBE, "camera probe");
+	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd));
+}
+
+static struct usb_driver sd_driver = {
+	.name = MODULE_NAME,
+	.id_table = device_table,
+	.probe = sd_probe,
+	.disconnect = gspca_disconnect,
+};
+
+/* -- module insert / remove -- */
+static int __init sd_mod_init(void)
+{
+	if (usb_register(&sd_driver) < 0)
+		return -1;
+	info("v%s registered", version);
+	return 0;
+}
+static void __exit sd_mod_exit(void)
+{
+	usb_deregister(&sd_driver);
+	info("deregistered");
+}
+
+module_init(sd_mod_init);
+module_exit(sd_mod_exit);
+
+module_param(lightfreq, int, 0644);
+MODULE_PARM_DESC(lightfreq, "Light frequency 50 or 60 Hz");
+module_param_named(quant, sd_quant, int, 0644);
+MODULE_PARM_DESC(quant, "Quantization index (0..8)");