[media] rename most media/video usb drivers to media/usb

Rename all USB drivers with their own directory under
drivers/media/video into drivers/media/usb and update the
building system.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 0 insertions, 2456 deletions

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
deleted file mode 100644
index d4e8343f5b10..000000000000
--- a/drivers/media/video/gspca/gspca.c
+++ /dev/null
@@ -1,2456 +0,0 @@
-/*
- * Main USB camera driver
- *
- * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr>
- *
- * Camera button input handling by Márton Németh
- * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
- *
- * 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#define GSPCA_VERSION	"2.14.0"
-
-#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 <linux/io.h>
-#include <asm/page.h>
-#include <linux/uaccess.h>
-#include <linux/ktime.h>
-#include <media/v4l2-ioctl.h>
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-fh.h>
-#include <media/v4l2-event.h>
-
-#include "gspca.h"
-
-#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
-#include <linux/input.h>
-#include <linux/usb/input.h>
-#endif
-
-/* global values */
-#define DEF_NURBS 3		/* default number of URBs */
-#if DEF_NURBS > MAX_NURBS
-#error "DEF_NURBS too big"
-#endif
-
-MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
-MODULE_DESCRIPTION("GSPCA USB Camera Driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(GSPCA_VERSION);
-
-#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
-
-/* specific memory types - !! should be different from V4L2_MEMORY_xxx */
-#define GSPCA_MEMORY_NO 0	/* V4L2_MEMORY_xxx starts from 1 */
-#define GSPCA_MEMORY_READ 7
-
-#define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
-
-/*
- * 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 const struct vm_operations_struct gspca_vm_ops = {
-	.open		= gspca_vm_open,
-	.close		= gspca_vm_close,
-};
-
-/*
- * Input and interrupt endpoint handling functions
- */
-#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
-static void int_irq(struct urb *urb)
-{
-	struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
-	int ret;
-
-	ret = urb->status;
-	switch (ret) {
-	case 0:
-		if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
-		    urb->transfer_buffer, urb->actual_length) < 0) {
-			PDEBUG(D_ERR, "Unknown packet received");
-		}
-		break;
-
-	case -ENOENT:
-	case -ECONNRESET:
-	case -ENODEV:
-	case -ESHUTDOWN:
-		/* Stop is requested either by software or hardware is gone,
-		 * keep the ret value non-zero and don't resubmit later.
-		 */
-		break;
-
-	default:
-		PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status);
-		urb->status = 0;
-		ret = 0;
-	}
-
-	if (ret == 0) {
-		ret = usb_submit_urb(urb, GFP_ATOMIC);
-		if (ret < 0)
-			pr_err("Resubmit URB failed with error %i\n", ret);
-	}
-}
-
-static int gspca_input_connect(struct gspca_dev *dev)
-{
-	struct input_dev *input_dev;
-	int err = 0;
-
-	dev->input_dev = NULL;
-	if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input)  {
-		input_dev = input_allocate_device();
-		if (!input_dev)
-			return -ENOMEM;
-
-		usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
-		strlcat(dev->phys, "/input0", sizeof(dev->phys));
-
-		input_dev->name = dev->sd_desc->name;
-		input_dev->phys = dev->phys;
-
-		usb_to_input_id(dev->dev, &input_dev->id);
-
-		input_dev->evbit[0] = BIT_MASK(EV_KEY);
-		input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
-		input_dev->dev.parent = &dev->dev->dev;
-
-		err = input_register_device(input_dev);
-		if (err) {
-			pr_err("Input device registration failed with error %i\n",
-			       err);
-			input_dev->dev.parent = NULL;
-			input_free_device(input_dev);
-		} else {
-			dev->input_dev = input_dev;
-		}
-	}
-
-	return err;
-}
-
-static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
-			  struct usb_endpoint_descriptor *ep)
-{
-	unsigned int buffer_len;
-	int interval;
-	struct urb *urb;
-	struct usb_device *dev;
-	void *buffer = NULL;
-	int ret = -EINVAL;
-
-	buffer_len = le16_to_cpu(ep->wMaxPacketSize);
-	interval = ep->bInterval;
-	PDEBUG(D_CONF, "found int in endpoint: 0x%x, "
-		"buffer_len=%u, interval=%u",
-		ep->bEndpointAddress, buffer_len, interval);
-
-	dev = gspca_dev->dev;
-
-	urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (!urb) {
-		ret = -ENOMEM;
-		goto error;
-	}
-
-	buffer = usb_alloc_coherent(dev, buffer_len,
-				GFP_KERNEL, &urb->transfer_dma);
-	if (!buffer) {
-		ret = -ENOMEM;
-		goto error_buffer;
-	}
-	usb_fill_int_urb(urb, dev,
-		usb_rcvintpipe(dev, ep->bEndpointAddress),
-		buffer, buffer_len,
-		int_irq, (void *)gspca_dev, interval);
-	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
-	ret = usb_submit_urb(urb, GFP_KERNEL);
-	if (ret < 0) {
-		PDEBUG(D_ERR, "submit int URB failed with error %i", ret);
-		goto error_submit;
-	}
-	gspca_dev->int_urb = urb;
-	return ret;
-
-error_submit:
-	usb_free_coherent(dev,
-			  urb->transfer_buffer_length,
-			  urb->transfer_buffer,
-			  urb->transfer_dma);
-error_buffer:
-	usb_free_urb(urb);
-error:
-	return ret;
-}
-
-static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
-{
-	struct usb_interface *intf;
-	struct usb_host_interface *intf_desc;
-	struct usb_endpoint_descriptor *ep;
-	int i;
-
-	if (gspca_dev->sd_desc->int_pkt_scan)  {
-		intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
-		intf_desc = intf->cur_altsetting;
-		for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
-			ep = &intf_desc->endpoint[i].desc;
-			if (usb_endpoint_dir_in(ep) &&
-			    usb_endpoint_xfer_int(ep)) {
-
-				alloc_and_submit_int_urb(gspca_dev, ep);
-				break;
-			}
-		}
-	}
-}
-
-static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
-{
-	struct urb *urb;
-
-	urb = gspca_dev->int_urb;
-	if (urb) {
-		gspca_dev->int_urb = NULL;
-		usb_kill_urb(urb);
-		usb_free_coherent(gspca_dev->dev,
-				  urb->transfer_buffer_length,
-				  urb->transfer_buffer,
-				  urb->transfer_dma);
-		usb_free_urb(urb);
-	}
-}
-#else
-static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
-{
-}
-
-static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
-{
-}
-
-static inline int gspca_input_connect(struct gspca_dev *dev)
-{
-	return 0;
-}
-#endif
-
-/*
- * fill a video frame from an URB and resubmit
- */
-static void fill_frame(struct gspca_dev *gspca_dev,
-			struct urb *urb)
-{
-	u8 *data;		/* address of data in the iso message */
-	int i, len, st;
-	cam_pkt_op pkt_scan;
-
-	if (urb->status != 0) {
-		if (urb->status == -ESHUTDOWN)
-			return;		/* disconnection */
-#ifdef CONFIG_PM
-		if (gspca_dev->frozen)
-			return;
-#endif
-		PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
-		urb->status = 0;
-		goto resubmit;
-	}
-	pkt_scan = gspca_dev->sd_desc->pkt_scan;
-	for (i = 0; i < urb->number_of_packets; i++) {
-		len = urb->iso_frame_desc[i].actual_length;
-
-		/* check the packet status and length */
-		st = urb->iso_frame_desc[i].status;
-		if (st) {
-			pr_err("ISOC data error: [%d] len=%d, status=%d\n",
-			       i, len, st);
-			gspca_dev->last_packet_type = DISCARD_PACKET;
-			continue;
-		}
-		if (len == 0) {
-			if (gspca_dev->empty_packet == 0)
-				gspca_dev->empty_packet = 1;
-			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 = (u8 *) urb->transfer_buffer
-					+ urb->iso_frame_desc[i].offset;
-		pkt_scan(gspca_dev, data, len);
-	}
-
-resubmit:
-	/* resubmit the URB */
-	st = usb_submit_urb(urb, GFP_ATOMIC);
-	if (st < 0)
-		pr_err("usb_submit_urb() ret %d\n", st);
-}
-
-/*
- * ISOC message interrupt from the USB device
- *
- * Analyse each packet and call the subdriver for copy to the frame buffer.
- */
-static void isoc_irq(struct urb *urb)
-{
-	struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
-
-	PDEBUG(D_PACK, "isoc irq");
-	if (!gspca_dev->streaming)
-		return;
-	fill_frame(gspca_dev, urb);
-}
-
-/*
- * bulk message interrupt from the USB device
- */
-static void bulk_irq(struct urb *urb)
-{
-	struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
-	int st;
-
-	PDEBUG(D_PACK, "bulk irq");
-	if (!gspca_dev->streaming)
-		return;
-	switch (urb->status) {
-	case 0:
-		break;
-	case -ESHUTDOWN:
-		return;		/* disconnection */
-	default:
-#ifdef CONFIG_PM
-		if (gspca_dev->frozen)
-			return;
-#endif
-		PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
-		urb->status = 0;
-		goto resubmit;
-	}
-
-	PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
-	gspca_dev->sd_desc->pkt_scan(gspca_dev,
-				urb->transfer_buffer,
-				urb->actual_length);
-
-resubmit:
-	/* resubmit the URB */
-	if (gspca_dev->cam.bulk_nurbs != 0) {
-		st = usb_submit_urb(urb, GFP_ATOMIC);
-		if (st < 0)
-			pr_err("usb_submit_urb() ret %d\n", 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.
- */
-void gspca_frame_add(struct gspca_dev *gspca_dev,
-			enum gspca_packet_type packet_type,
-			const u8 *data,
-			int len)
-{
-	struct gspca_frame *frame;
-	int i, j;
-
-	PDEBUG(D_PACK, "add t:%d l:%d",	packet_type, len);
-
-	if (packet_type == FIRST_PACKET) {
-		i = atomic_read(&gspca_dev->fr_i);
-
-		/* if there are no queued buffer, discard the whole frame */
-		if (i == atomic_read(&gspca_dev->fr_q)) {
-			gspca_dev->last_packet_type = DISCARD_PACKET;
-			gspca_dev->sequence++;
-			return;
-		}
-		j = gspca_dev->fr_queue[i];
-		frame = &gspca_dev->frame[j];
-		frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
-		frame->v4l2_buf.sequence = gspca_dev->sequence++;
-		gspca_dev->image = frame->data;
-		gspca_dev->image_len = 0;
-	} else {
-		switch (gspca_dev->last_packet_type) {
-		case DISCARD_PACKET:
-			if (packet_type == LAST_PACKET) {
-				gspca_dev->last_packet_type = packet_type;
-				gspca_dev->image = NULL;
-				gspca_dev->image_len = 0;
-			}
-			return;
-		case LAST_PACKET:
-			return;
-		}
-	}
-
-	/* append the packet to the frame buffer */
-	if (len > 0) {
-		if (gspca_dev->image_len + len > gspca_dev->frsz) {
-			PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d",
-				gspca_dev->image_len + len,
-				gspca_dev->frsz);
-			packet_type = DISCARD_PACKET;
-		} else {
-/* !! image is NULL only when last pkt is LAST or DISCARD
-			if (gspca_dev->image == NULL) {
-				pr_err("gspca_frame_add() image == NULL\n");
-				return;
-			}
- */
-			memcpy(gspca_dev->image + gspca_dev->image_len,
-				data, len);
-			gspca_dev->image_len += len;
-		}
-	}
-	gspca_dev->last_packet_type = packet_type;
-
-	/* if last packet, invalidate packet concatenation until
-	 * next first packet, wake up the application and advance
-	 * in the queue */
-	if (packet_type == LAST_PACKET) {
-		i = atomic_read(&gspca_dev->fr_i);
-		j = gspca_dev->fr_queue[i];
-		frame = &gspca_dev->frame[j];
-		frame->v4l2_buf.bytesused = gspca_dev->image_len;
-		frame->v4l2_buf.flags = (frame->v4l2_buf.flags
-					 | V4L2_BUF_FLAG_DONE)
-					& ~V4L2_BUF_FLAG_QUEUED;
-		i = (i + 1) % GSPCA_MAX_FRAMES;
-		atomic_set(&gspca_dev->fr_i, i);
-		wake_up_interruptible(&gspca_dev->wq);	/* event = new frame */
-		PDEBUG(D_FRAM, "frame complete len:%d",
-			frame->v4l2_buf.bytesused);
-		gspca_dev->image = NULL;
-		gspca_dev->image_len = 0;
-	}
-}
-EXPORT_SYMBOL(gspca_frame_add);
-
-static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file,
-			enum v4l2_memory memory, unsigned int count)
-{
-	struct gspca_frame *frame;
-	unsigned int frsz;
-	int i;
-
-	i = gspca_dev->curr_mode;
-	frsz = gspca_dev->cam.cam_mode[i].sizeimage;
-	PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
-	frsz = PAGE_ALIGN(frsz);
-	if (count >= GSPCA_MAX_FRAMES)
-		count = GSPCA_MAX_FRAMES - 1;
-	gspca_dev->frbuf = vmalloc_32(frsz * count);
-	if (!gspca_dev->frbuf) {
-		pr_err("frame alloc failed\n");
-		return -ENOMEM;
-	}
-	gspca_dev->capt_file = file;
-	gspca_dev->memory = memory;
-	gspca_dev->frsz = frsz;
-	gspca_dev->nframes = count;
-	for (i = 0; i < count; i++) {
-		frame = &gspca_dev->frame[i];
-		frame->v4l2_buf.index = i;
-		frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		frame->v4l2_buf.flags = 0;
-		frame->v4l2_buf.field = V4L2_FIELD_NONE;
-		frame->v4l2_buf.length = frsz;
-		frame->v4l2_buf.memory = memory;
-		frame->v4l2_buf.sequence = 0;
-		frame->data = gspca_dev->frbuf + i * frsz;
-		frame->v4l2_buf.m.offset = i * frsz;
-	}
-	atomic_set(&gspca_dev->fr_q, 0);
-	atomic_set(&gspca_dev->fr_i, 0);
-	gspca_dev->fr_o = 0;
-	return 0;
-}
-
-static void frame_free(struct gspca_dev *gspca_dev)
-{
-	int i;
-
-	PDEBUG(D_STREAM, "frame free");
-	if (gspca_dev->frbuf != NULL) {
-		vfree(gspca_dev->frbuf);
-		gspca_dev->frbuf = NULL;
-		for (i = 0; i < gspca_dev->nframes; i++)
-			gspca_dev->frame[i].data = NULL;
-	}
-	gspca_dev->nframes = 0;
-	gspca_dev->frsz = 0;
-	gspca_dev->capt_file = NULL;
-	gspca_dev->memory = GSPCA_MEMORY_NO;
-}
-
-static void destroy_urbs(struct gspca_dev *gspca_dev)
-{
-	struct urb *urb;
-	unsigned int i;
-
-	PDEBUG(D_STREAM, "kill transfer");
-	for (i = 0; i < MAX_NURBS; i++) {
-		urb = gspca_dev->urb[i];
-		if (urb == NULL)
-			break;
-
-		gspca_dev->urb[i] = NULL;
-		usb_kill_urb(urb);
-		if (urb->transfer_buffer != NULL)
-			usb_free_coherent(gspca_dev->dev,
-					  urb->transfer_buffer_length,
-					  urb->transfer_buffer,
-					  urb->transfer_dma);
-		usb_free_urb(urb);
-	}
-}
-
-static int gspca_set_alt0(struct gspca_dev *gspca_dev)
-{
-	int ret;
-
-	if (gspca_dev->alt == 0)
-		return 0;
-	ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
-	if (ret < 0)
-		pr_err("set alt 0 err %d\n", ret);
-	return ret;
-}
-
-/* Note: both the queue and the usb locks should be held when calling this */
-static void gspca_stream_off(struct gspca_dev *gspca_dev)
-{
-	gspca_dev->streaming = 0;
-	gspca_dev->usb_err = 0;
-	if (gspca_dev->sd_desc->stopN)
-		gspca_dev->sd_desc->stopN(gspca_dev);
-	destroy_urbs(gspca_dev);
-	gspca_input_destroy_urb(gspca_dev);
-	gspca_set_alt0(gspca_dev);
-	gspca_input_create_urb(gspca_dev);
-	if (gspca_dev->sd_desc->stop0)
-		gspca_dev->sd_desc->stop0(gspca_dev);
-	PDEBUG(D_STREAM, "stream off OK");
-}
-
-/*
- * look for an input transfer endpoint in an alternate setting
- */
-static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
-					  int xfer)
-{
-	struct usb_host_endpoint *ep;
-	int i, attr;
-
-	for (i = 0; i < alt->desc.bNumEndpoints; i++) {
-		ep = &alt->endpoint[i];
-		attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
-		if (attr == xfer
-		    && ep->desc.wMaxPacketSize != 0
-		    && usb_endpoint_dir_in(&ep->desc))
-			return ep;
-	}
-	return NULL;
-}
-
-/* compute the minimum bandwidth for the current transfer */
-static u32 which_bandwidth(struct gspca_dev *gspca_dev)
-{
-	u32 bandwidth;
-	int i;
-
-	/* get the (max) image size */
-	i = gspca_dev->curr_mode;
-	bandwidth = gspca_dev->cam.cam_mode[i].sizeimage;
-
-	/* if the image is compressed, estimate its mean size */
-	if (!gspca_dev->cam.needs_full_bandwidth &&
-	    bandwidth < gspca_dev->cam.cam_mode[i].width *
-				gspca_dev->cam.cam_mode[i].height)
-		bandwidth = bandwidth * 3 / 8;	/* 0.375 */
-
-	/* estimate the frame rate */
-	if (gspca_dev->sd_desc->get_streamparm) {
-		struct v4l2_streamparm parm;
-
-		gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
-		bandwidth *= parm.parm.capture.timeperframe.denominator;
-		bandwidth /= parm.parm.capture.timeperframe.numerator;
-	} else {
-
-		/* don't hope more than 15 fps with USB 1.1 and
-		 * image resolution >= 640x480 */
-		if (gspca_dev->width >= 640
-		 && gspca_dev->dev->speed == USB_SPEED_FULL)
-			bandwidth *= 15;		/* 15 fps */
-		else
-			bandwidth *= 30;		/* 30 fps */
-	}
-
-	PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth);
-	return bandwidth;
-}
-
-/* endpoint table */
-#define MAX_ALT 16
-struct ep_tb_s {
-	u32 alt;
-	u32 bandwidth;
-};
-
-/*
- * build the table of the endpoints
- * and compute the minimum bandwidth for the image transfer
- */
-static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
-			struct usb_interface *intf,
-			struct ep_tb_s *ep_tb)
-{
-	struct usb_host_endpoint *ep;
-	int i, j, nbalt, psize, found;
-	u32 bandwidth, last_bw;
-
-	nbalt = intf->num_altsetting;
-	if (nbalt > MAX_ALT)
-		nbalt = MAX_ALT;	/* fixme: should warn */
-
-	/* build the endpoint table */
-	i = 0;
-	last_bw = 0;
-	for (;;) {
-		ep_tb->bandwidth = 2000 * 2000 * 120;
-		found = 0;
-		for (j = 0; j < nbalt; j++) {
-			ep = alt_xfer(&intf->altsetting[j],
-				      USB_ENDPOINT_XFER_ISOC);
-			if (ep == NULL)
-				continue;
-			if (ep->desc.bInterval == 0) {
-				pr_err("alt %d iso endp with 0 interval\n", j);
-				continue;
-			}
-			psize = le16_to_cpu(ep->desc.wMaxPacketSize);
-			psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
-			bandwidth = psize * 1000;
-			if (gspca_dev->dev->speed == USB_SPEED_HIGH
-			 || gspca_dev->dev->speed == USB_SPEED_SUPER)
-				bandwidth *= 8;
-			bandwidth /= 1 << (ep->desc.bInterval - 1);
-			if (bandwidth <= last_bw)
-				continue;
-			if (bandwidth < ep_tb->bandwidth) {
-				ep_tb->bandwidth = bandwidth;
-				ep_tb->alt = j;
-				found = 1;
-			}
-		}
-		if (!found)
-			break;
-		PDEBUG(D_STREAM, "alt %d bandwidth %d",
-				ep_tb->alt, ep_tb->bandwidth);
-		last_bw = ep_tb->bandwidth;
-		i++;
-		ep_tb++;
-	}
-
-	/*
-	 * If the camera:
-	 * has a usb audio class interface (a built in usb mic); and
-	 * is a usb 1 full speed device; and
-	 * uses the max full speed iso bandwidth; and
-	 * and has more than 1 alt setting
-	 * then skip the highest alt setting to spare bandwidth for the mic
-	 */
-	if (gspca_dev->audio &&
-			gspca_dev->dev->speed == USB_SPEED_FULL &&
-			last_bw >= 1000000 &&
-			i > 1) {
-		PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt");
-		i--;
-		ep_tb--;
-	}
-
-	/* get the requested bandwidth and start at the highest atlsetting */
-	bandwidth = which_bandwidth(gspca_dev);
-	ep_tb--;
-	while (i > 1) {
-		ep_tb--;
-		if (ep_tb->bandwidth < bandwidth)
-			break;
-		i--;
-	}
-	return i;
-}
-
-/*
- * create the URBs for image transfer
- */
-static int create_urbs(struct gspca_dev *gspca_dev,
-			struct usb_host_endpoint *ep)
-{
-	struct urb *urb;
-	int n, nurbs, i, psize, npkt, bsize;
-
-	/* calculate the packet size and the number of packets */
-	psize = le16_to_cpu(ep->desc.wMaxPacketSize);
-
-	if (!gspca_dev->cam.bulk) {		/* isoc */
-
-		/* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
-		if (gspca_dev->pkt_size == 0)
-			psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
-		else
-			psize = gspca_dev->pkt_size;
-		npkt = gspca_dev->cam.npkt;
-		if (npkt == 0)
-			npkt = 32;		/* default value */
-		bsize = psize * npkt;
-		PDEBUG(D_STREAM,
-			"isoc %d pkts size %d = bsize:%d",
-			npkt, psize, bsize);
-		nurbs = DEF_NURBS;
-	} else {				/* bulk */
-		npkt = 0;
-		bsize = gspca_dev->cam.bulk_size;
-		if (bsize == 0)
-			bsize = psize;
-		PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
-		if (gspca_dev->cam.bulk_nurbs != 0)
-			nurbs = gspca_dev->cam.bulk_nurbs;
-		else
-			nurbs = 1;
-	}
-
-	for (n = 0; n < nurbs; n++) {
-		urb = usb_alloc_urb(npkt, GFP_KERNEL);
-		if (!urb) {
-			pr_err("usb_alloc_urb failed\n");
-			return -ENOMEM;
-		}
-		gspca_dev->urb[n] = urb;
-		urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
-						bsize,
-						GFP_KERNEL,
-						&urb->transfer_dma);
-
-		if (urb->transfer_buffer == NULL) {
-			pr_err("usb_alloc_coherent failed\n");
-			return -ENOMEM;
-		}
-		urb->dev = gspca_dev->dev;
-		urb->context = gspca_dev;
-		urb->transfer_buffer_length = bsize;
-		if (npkt != 0) {		/* ISOC */
-			urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
-						    ep->desc.bEndpointAddress);
-			urb->transfer_flags = URB_ISO_ASAP
-					| URB_NO_TRANSFER_DMA_MAP;
-			urb->interval = 1 << (ep->desc.bInterval - 1);
-			urb->complete = isoc_irq;
-			urb->number_of_packets = npkt;
-			for (i = 0; i < npkt; i++) {
-				urb->iso_frame_desc[i].length = psize;
-				urb->iso_frame_desc[i].offset = psize * i;
-			}
-		} else {		/* bulk */
-			urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
-						ep->desc.bEndpointAddress);
-			urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
-			urb->complete = bulk_irq;
-		}
-	}
-	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;
-	struct urb *urb;
-	struct ep_tb_s ep_tb[MAX_ALT];
-	int n, ret, xfer, alt, alt_idx;
-
-	/* reset the streaming variables */
-	gspca_dev->image = NULL;
-	gspca_dev->image_len = 0;
-	gspca_dev->last_packet_type = DISCARD_PACKET;
-	gspca_dev->sequence = 0;
-
-	gspca_dev->usb_err = 0;
-
-	/* do the specific subdriver stuff before endpoint selection */
-	intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
-	gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
-	if (gspca_dev->sd_desc->isoc_init) {
-		ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
-		if (ret < 0)
-			return ret;
-	}
-	xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
-				   : USB_ENDPOINT_XFER_ISOC;
-
-	/* if bulk or the subdriver forced an altsetting, get the endpoint */
-	if (gspca_dev->alt != 0) {
-		gspca_dev->alt--;	/* (previous version compatibility) */
-		ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer);
-		if (ep == NULL) {
-			pr_err("bad altsetting %d\n", gspca_dev->alt);
-			return -EIO;
-		}
-		ep_tb[0].alt = gspca_dev->alt;
-		alt_idx = 1;
-	} else {
-
-	/* else, compute the minimum bandwidth
-	 * and build the endpoint table */
-		alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
-		if (alt_idx <= 0) {
-			pr_err("no transfer endpoint found\n");
-			return -EIO;
-		}
-	}
-
-	/* set the highest alternate setting and
-	 * loop until urb submit succeeds */
-	gspca_input_destroy_urb(gspca_dev);
-
-	gspca_dev->alt = ep_tb[--alt_idx].alt;
-	alt = -1;
-	for (;;) {
-		if (alt != gspca_dev->alt) {
-			alt = gspca_dev->alt;
-			if (intf->num_altsetting > 1) {
-				ret = usb_set_interface(gspca_dev->dev,
-							gspca_dev->iface,
-							alt);
-				if (ret < 0) {
-					if (ret == -ENOSPC)
-						goto retry; /*fixme: ugly*/
-					pr_err("set alt %d err %d\n", alt, ret);
-					goto out;
-				}
-			}
-		}
-		if (!gspca_dev->cam.no_urb_create) {
-			PDEBUG(D_STREAM, "init transfer alt %d", alt);
-			ret = create_urbs(gspca_dev,
-				alt_xfer(&intf->altsetting[alt], xfer));
-			if (ret < 0) {
-				destroy_urbs(gspca_dev);
-				goto out;
-			}
-		}
-
-		/* clear the bulk endpoint */
-		if (gspca_dev->cam.bulk)
-			usb_clear_halt(gspca_dev->dev,
-					gspca_dev->urb[0]->pipe);
-
-		/* start the cam */
-		ret = gspca_dev->sd_desc->start(gspca_dev);
-		if (ret < 0) {
-			destroy_urbs(gspca_dev);
-			goto out;
-		}
-		gspca_dev->streaming = 1;
-		v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
-
-		/* some bulk transfers are started by the subdriver */
-		if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
-			break;
-
-		/* submit the URBs */
-		for (n = 0; n < MAX_NURBS; n++) {
-			urb = gspca_dev->urb[n];
-			if (urb == NULL)
-				break;
-			ret = usb_submit_urb(urb, GFP_KERNEL);
-			if (ret < 0)
-				break;
-		}
-		if (ret >= 0)
-			break;			/* transfer is started */
-
-		/* something when wrong
-		 * stop the webcam and free the transfer resources */
-		gspca_stream_off(gspca_dev);
-		if (ret != -ENOSPC) {
-			pr_err("usb_submit_urb alt %d err %d\n",
-			       gspca_dev->alt, ret);
-			goto out;
-		}
-
-		/* the bandwidth is not wide enough
-		 * negotiate or try a lower alternate setting */
-retry:
-		PDEBUG(D_ERR|D_STREAM,
-			"alt %d - bandwidth not wide enough - trying again",
-			alt);
-		msleep(20);	/* wait for kill complete */
-		if (gspca_dev->sd_desc->isoc_nego) {
-			ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
-			if (ret < 0)
-				goto out;
-		} else {
-			if (alt_idx <= 0) {
-				pr_err("no transfer endpoint found\n");
-				ret = -EIO;
-				goto out;
-			}
-			gspca_dev->alt = ep_tb[--alt_idx].alt;
-		}
-	}
-out:
-	gspca_input_create_urb(gspca_dev);
-	return ret;
-}
-
-static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
-{
-	struct gspca_ctrl *ctrl;
-	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].pixelformat;
-
-	/* set the current control values to their default values
-	 * which may have changed in sd_init() */
-	/* does nothing if ctrl_handler == NULL */
-	v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
-	ctrl = gspca_dev->cam.ctrls;
-	if (ctrl != NULL) {
-		for (i = 0;
-		     i < gspca_dev->sd_desc->nctrls;
-		     i++, ctrl++)
-			ctrl->val = ctrl->def;
-	}
-}
-
-static int wxh_to_mode(struct gspca_dev *gspca_dev,
-			int width, int height)
-{
-	int i;
-
-	for (i = gspca_dev->cam.nmodes; --i > 0; ) {
-		if (width >= gspca_dev->cam.cam_mode[i].width
-		    && height >= gspca_dev->cam.cam_mode[i].height)
-			break;
-	}
-	return i;
-}
-
-/*
- * 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].pixelformat
-								== pixfmt)
-				return modeD;
-		}
-		if (++modeU < gspca_dev->cam.nmodes) {
-			if (gspca_dev->cam.cam_mode[modeU].pixelformat
-								== pixfmt)
-				return modeU;
-		}
-	}
-	return -EINVAL;
-}
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-static int vidioc_g_register(struct file *file, void *priv,
-			struct v4l2_dbg_register *reg)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-
-	gspca_dev->usb_err = 0;
-	return gspca_dev->sd_desc->get_register(gspca_dev, reg);
-}
-
-static int vidioc_s_register(struct file *file, void *priv,
-			struct v4l2_dbg_register *reg)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-
-	gspca_dev->usb_err = 0;
-	return gspca_dev->sd_desc->set_register(gspca_dev, reg);
-}
-#endif
-
-static int vidioc_g_chip_ident(struct file *file, void *priv,
-			struct v4l2_dbg_chip_ident *chip)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-
-	gspca_dev->usb_err = 0;
-	return gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
-}
-
-static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
-				struct v4l2_fmtdesc *fmtdesc)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	int i, j, index;
-	__u32 fmt_tb[8];
-
-	/* 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].pixelformat;
-		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 >= ARRAY_SIZE(fmt_tb))
-				return -EINVAL;
-		}
-	}
-	if (i < 0)
-		return -EINVAL;		/* no more format */
-
-	fmtdesc->pixelformat = fmt_tb[index];
-	if (gspca_dev->cam.cam_mode[i].sizeimage <
-			gspca_dev->cam.cam_mode[i].width *
-				gspca_dev->cam.cam_mode[i].height)
-		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 vidioc_g_fmt_vid_cap(struct file *file, void *priv,
-			    struct v4l2_format *fmt)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	int mode;
-
-	mode = gspca_dev->curr_mode;
-	fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
-	/* some drivers use priv internally, zero it before giving it to
-	   userspace */
-	fmt->fmt.pix.priv = 0;
-	return 0;
-}
-
-static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
-			struct v4l2_format *fmt)
-{
-	int w, h, mode, mode2;
-
-	w = fmt->fmt.pix.width;
-	h = 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].pixelformat
-						!= 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 = gspca_dev->cam.cam_mode[mode];
-	/* some drivers use priv internally, zero it before giving it to
-	   userspace */
-	fmt->fmt.pix.priv = 0;
-	return mode;			/* used when s_fmt */
-}
-
-static int vidioc_try_fmt_vid_cap(struct file *file,
-			      void *priv,
-			      struct v4l2_format *fmt)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	int ret;
-
-	ret = try_fmt_vid_cap(gspca_dev, fmt);
-	if (ret < 0)
-		return ret;
-	return 0;
-}
-
-static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
-			    struct v4l2_format *fmt)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	int ret;
-
-	if (mutex_lock_interruptible(&gspca_dev->queue_lock))
-		return -ERESTARTSYS;
-
-	ret = try_fmt_vid_cap(gspca_dev, fmt);
-	if (ret < 0)
-		goto out;
-
-	if (gspca_dev->nframes != 0
-	    && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	if (ret == gspca_dev->curr_mode) {
-		ret = 0;
-		goto out;			/* same mode */
-	}
-
-	if (gspca_dev->streaming) {
-		ret = -EBUSY;
-		goto out;
-	}
-	gspca_dev->width = fmt->fmt.pix.width;
-	gspca_dev->height = fmt->fmt.pix.height;
-	gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
-	gspca_dev->curr_mode = ret;
-
-	ret = 0;
-out:
-	mutex_unlock(&gspca_dev->queue_lock);
-	return ret;
-}
-
-static int vidioc_enum_framesizes(struct file *file, void *priv,
-				  struct v4l2_frmsizeenum *fsize)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	int i;
-	__u32 index = 0;
-
-	for (i = 0; i < gspca_dev->cam.nmodes; i++) {
-		if (fsize->pixel_format !=
-				gspca_dev->cam.cam_mode[i].pixelformat)
-			continue;
-
-		if (fsize->index == index) {
-			fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
-			fsize->discrete.width =
-				gspca_dev->cam.cam_mode[i].width;
-			fsize->discrete.height =
-				gspca_dev->cam.cam_mode[i].height;
-			return 0;
-		}
-		index++;
-	}
-
-	return -EINVAL;
-}
-
-static int vidioc_enum_frameintervals(struct file *filp, void *priv,
-				      struct v4l2_frmivalenum *fival)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(filp);
-	int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
-	__u32 i;
-
-	if (gspca_dev->cam.mode_framerates == NULL ||
-			gspca_dev->cam.mode_framerates[mode].nrates == 0)
-		return -EINVAL;
-
-	if (fival->pixel_format !=
-			gspca_dev->cam.cam_mode[mode].pixelformat)
-		return -EINVAL;
-
-	for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
-		if (fival->index == i) {
-			fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
-			fival->discrete.numerator = 1;
-			fival->discrete.denominator =
-				gspca_dev->cam.mode_framerates[mode].rates[i];
-			return 0;
-		}
-	}
-
-	return -EINVAL;
-}
-
-static void gspca_release(struct v4l2_device *v4l2_device)
-{
-	struct gspca_dev *gspca_dev =
-		container_of(v4l2_device, struct gspca_dev, v4l2_dev);
-
-	v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
-	v4l2_device_unregister(&gspca_dev->v4l2_dev);
-	kfree(gspca_dev->usb_buf);
-	kfree(gspca_dev);
-}
-
-static int dev_open(struct file *file)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-
-	PDEBUG(D_STREAM, "[%s] open", current->comm);
-
-	/* protect the subdriver against rmmod */
-	if (!try_module_get(gspca_dev->module))
-		return -ENODEV;
-
-#ifdef GSPCA_DEBUG
-	/* activate the v4l2 debug */
-	if (gspca_debug & D_V4L2)
-		gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
-					| V4L2_DEBUG_IOCTL_ARG;
-	else
-		gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
-					| V4L2_DEBUG_IOCTL_ARG);
-#endif
-	return v4l2_fh_open(file);
-}
-
-static int dev_close(struct file *file)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-
-	PDEBUG(D_STREAM, "[%s] close", current->comm);
-
-	/* Needed for gspca_stream_off, always lock before queue_lock! */
-	if (mutex_lock_interruptible(&gspca_dev->usb_lock))
-		return -ERESTARTSYS;
-
-	if (mutex_lock_interruptible(&gspca_dev->queue_lock)) {
-		mutex_unlock(&gspca_dev->usb_lock);
-		return -ERESTARTSYS;
-	}
-
-	/* if the file did the capture, free the streaming resources */
-	if (gspca_dev->capt_file == file) {
-		if (gspca_dev->streaming)
-			gspca_stream_off(gspca_dev);
-		frame_free(gspca_dev);
-	}
-	module_put(gspca_dev->module);
-	mutex_unlock(&gspca_dev->queue_lock);
-	mutex_unlock(&gspca_dev->usb_lock);
-
-	PDEBUG(D_STREAM, "close done");
-
-	return v4l2_fh_release(file);
-}
-
-static int vidioc_querycap(struct file *file, void  *priv,
-			   struct v4l2_capability *cap)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-
-	strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
-			sizeof cap->driver);
-	if (gspca_dev->dev->product != NULL) {
-		strlcpy((char *) cap->card, gspca_dev->dev->product,
-			sizeof cap->card);
-	} else {
-		snprintf((char *) cap->card, sizeof cap->card,
-			"USB Camera (%04x:%04x)",
-			le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
-			le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
-	}
-	usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
-			sizeof(cap->bus_info));
-	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
-			  | V4L2_CAP_STREAMING
-			  | V4L2_CAP_READWRITE;
-	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
-	return 0;
-}
-
-static int get_ctrl(struct gspca_dev *gspca_dev,
-				   int id)
-{
-	const struct ctrl *ctrls;
-	int i;
-
-	for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
-	     i < gspca_dev->sd_desc->nctrls;
-	     i++, ctrls++) {
-		if (gspca_dev->ctrl_dis & (1 << i))
-			continue;
-		if (id == ctrls->qctrl.id)
-			return i;
-	}
-	return -1;
-}
-
-static int vidioc_queryctrl(struct file *file, void *priv,
-			   struct v4l2_queryctrl *q_ctrl)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	const struct ctrl *ctrls;
-	struct gspca_ctrl *gspca_ctrl;
-	int i, idx;
-	u32 id;
-
-	id = q_ctrl->id;
-	if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
-		id &= V4L2_CTRL_ID_MASK;
-		id++;
-		idx = -1;
-		for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
-			if (gspca_dev->ctrl_dis & (1 << i))
-				continue;
-			if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
-				continue;
-			if (idx >= 0
-			 && gspca_dev->sd_desc->ctrls[i].qctrl.id
-				    > gspca_dev->sd_desc->ctrls[idx].qctrl.id)
-				continue;
-			idx = i;
-		}
-	} else {
-		idx = get_ctrl(gspca_dev, id);
-	}
-	if (idx < 0)
-		return -EINVAL;
-	ctrls = &gspca_dev->sd_desc->ctrls[idx];
-	memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl);
-	if (gspca_dev->cam.ctrls != NULL) {
-		gspca_ctrl = &gspca_dev->cam.ctrls[idx];
-		q_ctrl->default_value = gspca_ctrl->def;
-		q_ctrl->minimum = gspca_ctrl->min;
-		q_ctrl->maximum = gspca_ctrl->max;
-	}
-	if (gspca_dev->ctrl_inac & (1 << idx))
-		q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
-	return 0;
-}
-
-static int vidioc_s_ctrl(struct file *file, void *priv,
-			 struct v4l2_control *ctrl)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	const struct ctrl *ctrls;
-	struct gspca_ctrl *gspca_ctrl;
-	int idx;
-
-	idx = get_ctrl(gspca_dev, ctrl->id);
-	if (idx < 0)
-		return -EINVAL;
-	if (gspca_dev->ctrl_inac & (1 << idx))
-		return -EINVAL;
-	ctrls = &gspca_dev->sd_desc->ctrls[idx];
-	if (gspca_dev->cam.ctrls != NULL) {
-		gspca_ctrl = &gspca_dev->cam.ctrls[idx];
-		if (ctrl->value < gspca_ctrl->min
-		    || ctrl->value > gspca_ctrl->max)
-			return -ERANGE;
-	} else {
-		gspca_ctrl = NULL;
-		if (ctrl->value < ctrls->qctrl.minimum
-		    || ctrl->value > ctrls->qctrl.maximum)
-			return -ERANGE;
-	}
-	PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
-	gspca_dev->usb_err = 0;
-	if (ctrls->set != NULL)
-		return ctrls->set(gspca_dev, ctrl->value);
-	if (gspca_ctrl != NULL) {
-		gspca_ctrl->val = ctrl->value;
-		if (ctrls->set_control != NULL
-		 && gspca_dev->streaming)
-			ctrls->set_control(gspca_dev);
-	}
-	return gspca_dev->usb_err;
-}
-
-static int vidioc_g_ctrl(struct file *file, void *priv,
-			 struct v4l2_control *ctrl)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	const struct ctrl *ctrls;
-	int idx;
-
-	idx = get_ctrl(gspca_dev, ctrl->id);
-	if (idx < 0)
-		return -EINVAL;
-	ctrls = &gspca_dev->sd_desc->ctrls[idx];
-
-	gspca_dev->usb_err = 0;
-	if (ctrls->get != NULL)
-		return ctrls->get(gspca_dev, &ctrl->value);
-	if (gspca_dev->cam.ctrls != NULL)
-		ctrl->value = gspca_dev->cam.ctrls[idx].val;
-	return 0;
-}
-
-static int vidioc_querymenu(struct file *file, void *priv,
-			    struct v4l2_querymenu *qmenu)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-
-	if (!gspca_dev->sd_desc->querymenu)
-		return -ENOTTY;
-	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 = video_drvdata(file);
-
-	if (input->index != 0)
-		return -EINVAL;
-	input->type = V4L2_INPUT_TYPE_CAMERA;
-	input->status = gspca_dev->cam.input_flags;
-	strlcpy(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 = video_drvdata(file);
-	int i, ret = 0, streaming;
-
-	i = rb->memory;			/* (avoid compilation warning) */
-	switch (i) {
-	case GSPCA_MEMORY_READ:			/* (internal call) */
-	case V4L2_MEMORY_MMAP:
-	case V4L2_MEMORY_USERPTR:
-		break;
-	default:
-		return -EINVAL;
-	}
-	if (mutex_lock_interruptible(&gspca_dev->queue_lock))
-		return -ERESTARTSYS;
-
-	if (gspca_dev->memory != GSPCA_MEMORY_NO
-	    && gspca_dev->memory != GSPCA_MEMORY_READ
-	    && gspca_dev->memory != rb->memory) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	/* only one file may do the capture */
-	if (gspca_dev->capt_file != NULL
-	    && gspca_dev->capt_file != file) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	/* if allocated, the buffers must not be mapped */
-	for (i = 0; i < gspca_dev->nframes; i++) {
-		if (gspca_dev->frame[i].vma_use_count) {
-			ret = -EBUSY;
-			goto out;
-		}
-	}
-
-	/* stop streaming */
-	streaming = gspca_dev->streaming;
-	if (streaming) {
-		gspca_stream_off(gspca_dev);
-
-		/* Don't restart the stream when switching from read
-		 * to mmap mode */
-		if (gspca_dev->memory == GSPCA_MEMORY_READ)
-			streaming = 0;
-	}
-
-	/* free the previous allocated buffers, if any */
-	if (gspca_dev->nframes != 0)
-		frame_free(gspca_dev);
-	if (rb->count == 0)			/* unrequest */
-		goto out;
-	ret = frame_alloc(gspca_dev, file, rb->memory, rb->count);
-	if (ret == 0) {
-		rb->count = gspca_dev->nframes;
-		if (streaming)
-			ret = gspca_init_transfer(gspca_dev);
-	}
-out:
-	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 = video_drvdata(file);
-	struct gspca_frame *frame;
-
-	if (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 = video_drvdata(file);
-	int ret;
-
-	if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		return -EINVAL;
-	if (mutex_lock_interruptible(&gspca_dev->queue_lock))
-		return -ERESTARTSYS;
-
-	/* check the capture file */
-	if (gspca_dev->capt_file != file) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	if (gspca_dev->nframes == 0
-	    || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
-		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
-	ret = 0;
-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 = video_drvdata(file);
-	int i, ret;
-
-	if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		return -EINVAL;
-
-	if (mutex_lock_interruptible(&gspca_dev->queue_lock))
-		return -ERESTARTSYS;
-
-	if (!gspca_dev->streaming) {
-		ret = 0;
-		goto out;
-	}
-
-	/* check the capture file */
-	if (gspca_dev->capt_file != file) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	/* stop streaming */
-	gspca_stream_off(gspca_dev);
-	/* In case another thread is waiting in dqbuf */
-	wake_up_interruptible(&gspca_dev->wq);
-
-	/* empty the transfer queues */
-	for (i = 0; i < gspca_dev->nframes; i++)
-		gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
-	atomic_set(&gspca_dev->fr_q, 0);
-	atomic_set(&gspca_dev->fr_i, 0);
-	gspca_dev->fr_o = 0;
-	ret = 0;
-out:
-	mutex_unlock(&gspca_dev->queue_lock);
-	return ret;
-}
-
-static int vidioc_g_jpegcomp(struct file *file, void *priv,
-			struct v4l2_jpegcompression *jpegcomp)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-
-	gspca_dev->usb_err = 0;
-	return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
-}
-
-static int vidioc_s_jpegcomp(struct file *file, void *priv,
-			struct v4l2_jpegcompression *jpegcomp)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-
-	gspca_dev->usb_err = 0;
-	return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
-}
-
-static int vidioc_g_parm(struct file *filp, void *priv,
-			struct v4l2_streamparm *parm)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(filp);
-
-	parm->parm.capture.readbuffers = gspca_dev->nbufread;
-
-	if (gspca_dev->sd_desc->get_streamparm) {
-		gspca_dev->usb_err = 0;
-		gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
-		return gspca_dev->usb_err;
-	}
-	return 0;
-}
-
-static int vidioc_s_parm(struct file *filp, void *priv,
-			struct v4l2_streamparm *parm)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(filp);
-	int n;
-
-	n = parm->parm.capture.readbuffers;
-	if (n == 0 || n >= GSPCA_MAX_FRAMES)
-		parm->parm.capture.readbuffers = gspca_dev->nbufread;
-	else
-		gspca_dev->nbufread = n;
-
-	if (gspca_dev->sd_desc->set_streamparm) {
-		gspca_dev->usb_err = 0;
-		gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
-		return gspca_dev->usb_err;
-	}
-
-	return 0;
-}
-
-static int dev_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	struct gspca_frame *frame;
-	struct page *page;
-	unsigned long addr, start, size;
-	int i, ret;
-
-	start = vma->vm_start;
-	size = vma->vm_end - vma->vm_start;
-	PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
-
-	if (mutex_lock_interruptible(&gspca_dev->queue_lock))
-		return -ERESTARTSYS;
-	if (gspca_dev->capt_file != file) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	frame = NULL;
-	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 == NULL) {
-		PDEBUG(D_STREAM, "mmap no frame buffer found");
-		ret = -EINVAL;
-		goto out;
-	}
-	if (size != frame->v4l2_buf.length) {
-		PDEBUG(D_STREAM, "mmap bad size");
-		ret = -EINVAL;
-		goto out;
-	}
-
-	/*
-	 * - 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 out;
-		start += PAGE_SIZE;
-		addr += PAGE_SIZE;
-		size -= PAGE_SIZE;
-	}
-
-	vma->vm_ops = &gspca_vm_ops;
-	vma->vm_private_data = frame;
-	gspca_vm_open(vma);
-	ret = 0;
-out:
-	mutex_unlock(&gspca_dev->queue_lock);
-	return ret;
-}
-
-static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file,
-				enum v4l2_memory memory)
-{
-	if (!gspca_dev->present)
-		return -ENODEV;
-	if (gspca_dev->capt_file != file || gspca_dev->memory != memory ||
-			!gspca_dev->streaming)
-		return -EINVAL;
-
-	/* check if a frame is ready */
-	return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i);
-}
-
-static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
-			enum v4l2_memory memory)
-{
-	int ret;
-
-	if (mutex_lock_interruptible(&gspca_dev->queue_lock))
-		return -ERESTARTSYS;
-	ret = frame_ready_nolock(gspca_dev, file, memory);
-	mutex_unlock(&gspca_dev->queue_lock);
-	return ret;
-}
-
-/*
- * 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 = video_drvdata(file);
-	struct gspca_frame *frame;
-	int i, j, ret;
-
-	PDEBUG(D_FRAM, "dqbuf");
-
-	if (mutex_lock_interruptible(&gspca_dev->queue_lock))
-		return -ERESTARTSYS;
-
-	for (;;) {
-		ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory);
-		if (ret < 0)
-			goto out;
-		if (ret > 0)
-			break;
-
-		mutex_unlock(&gspca_dev->queue_lock);
-
-		if (file->f_flags & O_NONBLOCK)
-			return -EAGAIN;
-
-		/* wait till a frame is ready */
-		ret = wait_event_interruptible_timeout(gspca_dev->wq,
-			frame_ready(gspca_dev, file, v4l2_buf->memory),
-			msecs_to_jiffies(3000));
-		if (ret < 0)
-			return ret;
-		if (ret == 0)
-			return -EIO;
-
-		if (mutex_lock_interruptible(&gspca_dev->queue_lock))
-			return -ERESTARTSYS;
-	}
-
-	i = gspca_dev->fr_o;
-	j = gspca_dev->fr_queue[i];
-	frame = &gspca_dev->frame[j];
-
-	gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
-
-	frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
-	memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
-	PDEBUG(D_FRAM, "dqbuf %d", j);
-	ret = 0;
-
-	if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
-		if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
-				 frame->data,
-				 frame->v4l2_buf.bytesused)) {
-			PDEBUG(D_ERR|D_STREAM,
-				"dqbuf cp to user failed");
-			ret = -EFAULT;
-		}
-	}
-out:
-	mutex_unlock(&gspca_dev->queue_lock);
-
-	if (ret == 0 && gspca_dev->sd_desc->dq_callback) {
-		mutex_lock(&gspca_dev->usb_lock);
-		gspca_dev->usb_err = 0;
-		if (gspca_dev->present)
-			gspca_dev->sd_desc->dq_callback(gspca_dev);
-		mutex_unlock(&gspca_dev->usb_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 = video_drvdata(file);
-	struct gspca_frame *frame;
-	int i, index, ret;
-
-	PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
-
-	if (mutex_lock_interruptible(&gspca_dev->queue_lock))
-		return -ERESTARTSYS;
-
-	index = v4l2_buf->index;
-	if ((unsigned) index >= gspca_dev->nframes) {
-		PDEBUG(D_FRAM,
-			"qbuf idx %d >= %d", index, gspca_dev->nframes);
-		ret = -EINVAL;
-		goto out;
-	}
-	if (v4l2_buf->memory != gspca_dev->memory) {
-		PDEBUG(D_FRAM, "qbuf bad memory type");
-		ret = -EINVAL;
-		goto out;
-	}
-
-	frame = &gspca_dev->frame[index];
-	if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
-		PDEBUG(D_FRAM, "qbuf bad state");
-		ret = -EINVAL;
-		goto out;
-	}
-
-	frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
-
-	if (frame->v4l2_buf.memory == V4L2_MEMORY_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 = atomic_read(&gspca_dev->fr_q);
-	gspca_dev->fr_queue[i] = index;
-	atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
-
-	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;
-}
-
-/*
- * allocate the resources for read()
- */
-static int read_alloc(struct gspca_dev *gspca_dev,
-			struct file *file)
-{
-	struct v4l2_buffer v4l2_buf;
-	int i, ret;
-
-	PDEBUG(D_STREAM, "read alloc");
-
-	if (mutex_lock_interruptible(&gspca_dev->usb_lock))
-		return -ERESTARTSYS;
-
-	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 = GSPCA_MEMORY_READ;
-		ret = vidioc_reqbufs(file, gspca_dev, &rb);
-		if (ret != 0) {
-			PDEBUG(D_STREAM, "read reqbuf err %d", ret);
-			goto out;
-		}
-		memset(&v4l2_buf, 0, sizeof v4l2_buf);
-		v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		v4l2_buf.memory = GSPCA_MEMORY_READ;
-		for (i = 0; i < gspca_dev->nbufread; i++) {
-			v4l2_buf.index = i;
-			ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
-			if (ret != 0) {
-				PDEBUG(D_STREAM, "read qbuf err: %d", ret);
-				goto out;
-			}
-		}
-	}
-
-	/* start streaming */
-	ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
-	if (ret != 0)
-		PDEBUG(D_STREAM, "read streamon err %d", ret);
-out:
-	mutex_unlock(&gspca_dev->usb_lock);
-	return ret;
-}
-
-static unsigned int dev_poll(struct file *file, poll_table *wait)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	unsigned long req_events = poll_requested_events(wait);
-	int ret = 0;
-
-	PDEBUG(D_FRAM, "poll");
-
-	if (req_events & POLLPRI)
-		ret |= v4l2_ctrl_poll(file, wait);
-
-	if (req_events & (POLLIN | POLLRDNORM)) {
-		/* if reqbufs is not done, the user would use read() */
-		if (gspca_dev->memory == GSPCA_MEMORY_NO) {
-			if (read_alloc(gspca_dev, file) != 0) {
-				ret |= POLLERR;
-				goto out;
-			}
-		}
-
-		poll_wait(file, &gspca_dev->wq, wait);
-
-		/* check if an image has been received */
-		if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) {
-			ret |= POLLERR;
-			goto out;
-		}
-		if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
-			ret |= POLLIN | POLLRDNORM;
-		mutex_unlock(&gspca_dev->queue_lock);
-	}
-
-out:
-	if (!gspca_dev->present)
-		ret |= POLLHUP;
-
-	return ret;
-}
-
-static ssize_t dev_read(struct file *file, char __user *data,
-		    size_t count, loff_t *ppos)
-{
-	struct gspca_dev *gspca_dev = video_drvdata(file);
-	struct gspca_frame *frame;
-	struct v4l2_buffer v4l2_buf;
-	struct timeval timestamp;
-	int n, ret, ret2;
-
-	PDEBUG(D_FRAM, "read (%zd)", count);
-	if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */
-		ret = read_alloc(gspca_dev, file);
-		if (ret != 0)
-			return ret;
-	}
-
-	/* get a frame */
-	timestamp = ktime_to_timeval(ktime_get());
-	timestamp.tv_sec--;
-	n = 2;
-	for (;;) {
-		memset(&v4l2_buf, 0, sizeof v4l2_buf);
-		v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		v4l2_buf.memory = GSPCA_MEMORY_READ;
-		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 newer frame */
-		frame = &gspca_dev->frame[v4l2_buf.index];
-		if (--n < 0)
-			break;			/* avoid infinite loop */
-		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)
-		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 / %zd", 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 struct v4l2_file_operations dev_fops = {
-	.owner = THIS_MODULE,
-	.open = dev_open,
-	.release = dev_close,
-	.read = dev_read,
-	.mmap = dev_mmap,
-	.unlocked_ioctl = video_ioctl2,
-	.poll	= dev_poll,
-};
-
-static const struct v4l2_ioctl_ops dev_ioctl_ops = {
-	.vidioc_querycap	= vidioc_querycap,
-	.vidioc_dqbuf		= vidioc_dqbuf,
-	.vidioc_qbuf		= vidioc_qbuf,
-	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
-	.vidioc_try_fmt_vid_cap	= vidioc_try_fmt_vid_cap,
-	.vidioc_g_fmt_vid_cap	= vidioc_g_fmt_vid_cap,
-	.vidioc_s_fmt_vid_cap	= vidioc_s_fmt_vid_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,
-	.vidioc_enum_framesizes = vidioc_enum_framesizes,
-	.vidioc_enum_frameintervals = vidioc_enum_frameintervals,
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-	.vidioc_g_register	= vidioc_g_register,
-	.vidioc_s_register	= vidioc_s_register,
-#endif
-	.vidioc_g_chip_ident	= vidioc_g_chip_ident,
-	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
-	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
-};
-
-static const struct video_device gspca_template = {
-	.name = "gspca main driver",
-	.fops = &dev_fops,
-	.ioctl_ops = &dev_ioctl_ops,
-	.release = video_device_release_empty, /* We use v4l2_dev.release */
-};
-
-/* initialize the controls */
-static void ctrls_init(struct gspca_dev *gspca_dev)
-{
-	struct gspca_ctrl *ctrl;
-	int i;
-
-	for (i = 0, ctrl = gspca_dev->cam.ctrls;
-	     i < gspca_dev->sd_desc->nctrls;
-	     i++, ctrl++) {
-		ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value;
-		ctrl->val = ctrl->def;
-		ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum;
-		ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum;
-	}
-}
-
-/*
- * 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_probe2(struct usb_interface *intf,
-		const struct usb_device_id *id,
-		const struct sd_desc *sd_desc,
-		int dev_size,
-		struct module *module)
-{
-	struct gspca_dev *gspca_dev;
-	struct usb_device *dev = interface_to_usbdev(intf);
-	int ret;
-
-	pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
-		sd_desc->name, id->idVendor, id->idProduct);
-
-	/* create the device */
-	if (dev_size < sizeof *gspca_dev)
-		dev_size = sizeof *gspca_dev;
-	gspca_dev = kzalloc(dev_size, GFP_KERNEL);
-	if (!gspca_dev) {
-		pr_err("couldn't kzalloc gspca struct\n");
-		return -ENOMEM;
-	}
-	gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
-	if (!gspca_dev->usb_buf) {
-		pr_err("out of memory\n");
-		ret = -ENOMEM;
-		goto out;
-	}
-	gspca_dev->dev = dev;
-	gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
-
-	/* check if any audio device */
-	if (dev->actconfig->desc.bNumInterfaces != 1) {
-		int i;
-		struct usb_interface *intf2;
-
-		for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
-			intf2 = dev->actconfig->interface[i];
-			if (intf2 != NULL
-			 && intf2->altsetting != NULL
-			 && intf2->altsetting->desc.bInterfaceClass ==
-					 USB_CLASS_AUDIO) {
-				gspca_dev->audio = 1;
-				break;
-			}
-		}
-	}
-
-	gspca_dev->v4l2_dev.release = gspca_release;
-	ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
-	if (ret)
-		goto out;
-	gspca_dev->sd_desc = sd_desc;
-	gspca_dev->nbufread = 2;
-	gspca_dev->empty_packet = -1;	/* don't check the empty packets */
-	gspca_dev->vdev = gspca_template;
-	gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
-	video_set_drvdata(&gspca_dev->vdev, gspca_dev);
-	set_bit(V4L2_FL_USE_FH_PRIO, &gspca_dev->vdev.flags);
-	gspca_dev->module = module;
-	gspca_dev->present = 1;
-
-	mutex_init(&gspca_dev->usb_lock);
-	gspca_dev->vdev.lock = &gspca_dev->usb_lock;
-	mutex_init(&gspca_dev->queue_lock);
-	init_waitqueue_head(&gspca_dev->wq);
-
-	/* configure the subdriver and initialize the USB device */
-	ret = sd_desc->config(gspca_dev, id);
-	if (ret < 0)
-		goto out;
-	if (gspca_dev->cam.ctrls != NULL)
-		ctrls_init(gspca_dev);
-	ret = sd_desc->init(gspca_dev);
-	if (ret < 0)
-		goto out;
-	if (sd_desc->init_controls)
-		ret = sd_desc->init_controls(gspca_dev);
-	if (ret < 0)
-		goto out;
-	gspca_set_default_mode(gspca_dev);
-
-	ret = gspca_input_connect(gspca_dev);
-	if (ret)
-		goto out;
-
-	/*
-	 * Don't take usb_lock for these ioctls. This improves latency if
-	 * usb_lock is taken for a long time, e.g. when changing a control
-	 * value, and a new frame is ready to be dequeued.
-	 */
-	v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF);
-	v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF);
-	v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF);
-	if (!gspca_dev->sd_desc->get_chip_ident)
-		v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_CHIP_IDENT);
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-	if (!gspca_dev->sd_desc->get_chip_ident ||
-	    !gspca_dev->sd_desc->get_register)
-		v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
-	if (!gspca_dev->sd_desc->get_chip_ident ||
-	    !gspca_dev->sd_desc->set_register)
-		v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
-#endif
-	if (!gspca_dev->sd_desc->get_jcomp)
-		v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
-	if (!gspca_dev->sd_desc->set_jcomp)
-		v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
-
-	/* init video stuff */
-	ret = video_register_device(&gspca_dev->vdev,
-				  VFL_TYPE_GRABBER,
-				  -1);
-	if (ret < 0) {
-		pr_err("video_register_device err %d\n", ret);
-		goto out;
-	}
-
-	usb_set_intfdata(intf, gspca_dev);
-	PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
-
-	gspca_input_create_urb(gspca_dev);
-
-	return 0;
-out:
-#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
-	if (gspca_dev->input_dev)
-		input_unregister_device(gspca_dev->input_dev);
-#endif
-	v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
-	kfree(gspca_dev->usb_buf);
-	kfree(gspca_dev);
-	return ret;
-}
-EXPORT_SYMBOL(gspca_dev_probe2);
-
-/* same function as the previous one, but check the interface */
-int gspca_dev_probe(struct usb_interface *intf,
-		const struct usb_device_id *id,
-		const struct sd_desc *sd_desc,
-		int dev_size,
-		struct module *module)
-{
-	struct usb_device *dev = interface_to_usbdev(intf);
-
-	/* we don't handle multi-config cameras */
-	if (dev->descriptor.bNumConfigurations != 1) {
-		pr_err("%04x:%04x too many config\n",
-		       id->idVendor, id->idProduct);
-		return -ENODEV;
-	}
-
-	/* the USB video interface must be the first one */
-	if (dev->actconfig->desc.bNumInterfaces != 1
-	 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
-		return -ENODEV;
-
-	return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
-}
-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 defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
-	struct input_dev *input_dev;
-#endif
-
-	PDEBUG(D_PROBE, "%s disconnect",
-		video_device_node_name(&gspca_dev->vdev));
-
-	mutex_lock(&gspca_dev->usb_lock);
-
-	usb_set_intfdata(intf, NULL);
-	gspca_dev->dev = NULL;
-	gspca_dev->present = 0;
-	destroy_urbs(gspca_dev);
-
-#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
-	gspca_input_destroy_urb(gspca_dev);
-	input_dev = gspca_dev->input_dev;
-	if (input_dev) {
-		gspca_dev->input_dev = NULL;
-		input_unregister_device(input_dev);
-	}
-#endif
-	/* Free subdriver's streaming resources / stop sd workqueue(s) */
-	if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming)
-		gspca_dev->sd_desc->stop0(gspca_dev);
-	gspca_dev->streaming = 0;
-	wake_up_interruptible(&gspca_dev->wq);
-
-	v4l2_device_disconnect(&gspca_dev->v4l2_dev);
-	video_unregister_device(&gspca_dev->vdev);
-
-	mutex_unlock(&gspca_dev->usb_lock);
-
-	/* (this will call gspca_release() immediately or on last close) */
-	v4l2_device_put(&gspca_dev->v4l2_dev);
-}
-EXPORT_SYMBOL(gspca_disconnect);
-
-#ifdef CONFIG_PM
-int gspca_suspend(struct usb_interface *intf, pm_message_t message)
-{
-	struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
-
-	if (!gspca_dev->streaming)
-		return 0;
-	mutex_lock(&gspca_dev->usb_lock);
-	gspca_dev->frozen = 1;		/* avoid urb error messages */
-	gspca_dev->usb_err = 0;
-	if (gspca_dev->sd_desc->stopN)
-		gspca_dev->sd_desc->stopN(gspca_dev);
-	destroy_urbs(gspca_dev);
-	gspca_input_destroy_urb(gspca_dev);
-	gspca_set_alt0(gspca_dev);
-	if (gspca_dev->sd_desc->stop0)
-		gspca_dev->sd_desc->stop0(gspca_dev);
-	mutex_unlock(&gspca_dev->usb_lock);
-	return 0;
-}
-EXPORT_SYMBOL(gspca_suspend);
-
-int gspca_resume(struct usb_interface *intf)
-{
-	struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
-	int streaming, ret = 0;
-
-	mutex_lock(&gspca_dev->usb_lock);
-	gspca_dev->frozen = 0;
-	gspca_dev->usb_err = 0;
-	gspca_dev->sd_desc->init(gspca_dev);
-	gspca_input_create_urb(gspca_dev);
-	/*
-	 * Most subdrivers send all ctrl values on sd_start and thus
-	 * only write to the device registers on s_ctrl when streaming ->
-	 * Clear streaming to avoid setting all ctrls twice.
-	 */
-	streaming = gspca_dev->streaming;
-	gspca_dev->streaming = 0;
-	if (streaming)
-		ret = gspca_init_transfer(gspca_dev);
-	mutex_unlock(&gspca_dev->usb_lock);
-	return ret;
-}
-EXPORT_SYMBOL(gspca_resume);
-#endif
-
-/* -- module insert / remove -- */
-static int __init gspca_init(void)
-{
-	pr_info("v" GSPCA_VERSION " registered\n");
-	return 0;
-}
-static void __exit gspca_exit(void)
-{
-}
-
-module_init(gspca_init);
-module_exit(gspca_exit);
-
-#ifdef GSPCA_DEBUG
-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"
-		" 0x0100: v4l2");
-#endif