Added missing tegra files.HEADmaster

1 files changed, 1483 insertions, 0 deletions

diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c
new file mode 100644
index 00000000000..51ca3589b1b
--- /dev/null
+++ b/drivers/media/video/pwc/pwc-if.c
@@ -0,0 +1,1483 @@
+/* Linux driver for Philips webcam
+   USB and Video4Linux interface part.
+   (C) 1999-2004 Nemosoft Unv.
+   (C) 2004-2006 Luc Saillard (luc@saillard.org)
+   (C) 2011 Hans de Goede <hdegoede@redhat.com>
+
+   NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
+   driver and thus may have bugs that are not present in the original version.
+   Please send bug reports and support requests to <luc@saillard.org>.
+   The decompression routines have been implemented by reverse-engineering the
+   Nemosoft binary pwcx module. Caveat emptor.
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+*/
+
+/*
+   This code forms the interface between the USB layers and the Philips
+   specific stuff. Some adanved stuff of the driver falls under an
+   NDA, signed between me and Philips B.V., Eindhoven, the Netherlands, and
+   is thus not distributed in source form. The binary pwcx.o module
+   contains the code that falls under the NDA.
+
+   In case you're wondering: 'pwc' stands for "Philips WebCam", but
+   I really didn't want to type 'philips_web_cam' every time (I'm lazy as
+   any Linux kernel hacker, but I don't like uncomprehensible abbreviations
+   without explanation).
+
+   Oh yes, convention: to disctinguish between all the various pointers to
+   device-structures, I use these names for the pointer variables:
+   udev: struct usb_device *
+   vdev: struct video_device (member of pwc_dev)
+   pdev: struct pwc_devive *
+*/
+
+/* Contributors:
+   - Alvarado: adding whitebalance code
+   - Alistar Moire: QuickCam 3000 Pro device/product ID
+   - Tony Hoyle: Creative Labs Webcam 5 device/product ID
+   - Mark Burazin: solving hang in VIDIOCSYNC when camera gets unplugged
+   - Jk Fang: Sotec Afina Eye ID
+   - Xavier Roche: QuickCam Pro 4000 ID
+   - Jens Knudsen: QuickCam Zoom ID
+   - J. Debert: QuickCam for Notebooks ID
+   - Pham Thanh Nam: webcam snapshot button as an event input device
+*/
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/poll.h>
+#include <linux/slab.h>
+#ifdef CONFIG_USB_PWC_INPUT_EVDEV
+#include <linux/usb/input.h>
+#endif
+#include <linux/vmalloc.h>
+#include <asm/io.h>
+#include <linux/kernel.h>               /* simple_strtol() */
+
+#include "pwc.h"
+#include "pwc-kiara.h"
+#include "pwc-timon.h"
+#include "pwc-dec23.h"
+#include "pwc-dec1.h"
+
+/* Function prototypes and driver templates */
+
+/* hotplug device table support */
+static const struct usb_device_id pwc_device_table [] = {
+        { USB_DEVICE(0x0471, 0x0302) }, /* Philips models */
+        { USB_DEVICE(0x0471, 0x0303) },
+        { USB_DEVICE(0x0471, 0x0304) },
+        { USB_DEVICE(0x0471, 0x0307) },
+        { USB_DEVICE(0x0471, 0x0308) },
+        { USB_DEVICE(0x0471, 0x030C) },
+        { USB_DEVICE(0x0471, 0x0310) },
+        { USB_DEVICE(0x0471, 0x0311) }, /* Philips ToUcam PRO II */
+        { USB_DEVICE(0x0471, 0x0312) },
+        { USB_DEVICE(0x0471, 0x0313) }, /* the 'new' 720K */
+        { USB_DEVICE(0x0471, 0x0329) }, /* Philips SPC 900NC PC Camera */
+        { USB_DEVICE(0x069A, 0x0001) }, /* Askey */
+        { USB_DEVICE(0x046D, 0x08B0) }, /* Logitech QuickCam Pro 3000 */
+        { USB_DEVICE(0x046D, 0x08B1) }, /* Logitech QuickCam Notebook Pro */
+        { USB_DEVICE(0x046D, 0x08B2) }, /* Logitech QuickCam Pro 4000 */
+        { USB_DEVICE(0x046D, 0x08B3) }, /* Logitech QuickCam Zoom (old model) */
+        { USB_DEVICE(0x046D, 0x08B4) }, /* Logitech QuickCam Zoom (new model) */
+        { USB_DEVICE(0x046D, 0x08B5) }, /* Logitech QuickCam Orbit/Sphere */
+        { USB_DEVICE(0x046D, 0x08B6) }, /* Cisco VT Camera */
+        { USB_DEVICE(0x046D, 0x08B7) }, /* Logitech ViewPort AV 100 */
+        { USB_DEVICE(0x046D, 0x08B8) }, /* Logitech (reserved) */
+        { USB_DEVICE(0x055D, 0x9000) }, /* Samsung MPC-C10 */
+        { USB_DEVICE(0x055D, 0x9001) }, /* Samsung MPC-C30 */
+        { USB_DEVICE(0x055D, 0x9002) }, /* Samsung SNC-35E (Ver3.0) */
+        { USB_DEVICE(0x041E, 0x400C) }, /* Creative Webcam 5 */
+        { USB_DEVICE(0x041E, 0x4011) }, /* Creative Webcam Pro Ex */
+        { USB_DEVICE(0x04CC, 0x8116) }, /* Afina Eye */
+        { USB_DEVICE(0x06BE, 0x8116) }, /* new Afina Eye */
+        { USB_DEVICE(0x0d81, 0x1910) }, /* Visionite */
+        { USB_DEVICE(0x0d81, 0x1900) },
+        { }
+};
+MODULE_DEVICE_TABLE(usb, pwc_device_table);
+
+static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id *id);
+static void usb_pwc_disconnect(struct usb_interface *intf);
+static void pwc_isoc_cleanup(struct pwc_device *pdev);
+
+static struct usb_driver pwc_driver = {
+        .name =                 "Philips webcam",       /* name */
+        .id_table =             pwc_device_table,
+        .probe =                usb_pwc_probe,          /* probe() */
+        .disconnect =           usb_pwc_disconnect,     /* disconnect() */
+};
+
+#define MAX_DEV_HINTS   20
+#define MAX_ISOC_ERRORS 20
+
+static int default_fps = 10;
+#ifdef CONFIG_USB_PWC_DEBUG
+        int pwc_trace = PWC_DEBUG_LEVEL;
+#endif
+static int power_save = -1;
+static int led_on = 100, led_off; /* defaults to LED that is on while in use */
+static int pwc_preferred_compression = 1; /* 0..3 = uncompressed..high */
+static struct {
+        int type;
+        char serial_number[30];
+        int device_node;
+        struct pwc_device *pdev;
+} device_hint[MAX_DEV_HINTS];
+
+/***/
+
+static int pwc_video_open(struct file *file);
+static int pwc_video_close(struct file *file);
+static ssize_t pwc_video_read(struct file *file, char __user *buf,
+                          size_t count, loff_t *ppos);
+static unsigned int pwc_video_poll(struct file *file, poll_table *wait);
+static int  pwc_video_mmap(struct file *file, struct vm_area_struct *vma);
+static void pwc_video_release(struct video_device *vfd);
+
+static const struct v4l2_file_operations pwc_fops = {
+        .owner =        THIS_MODULE,
+        .open =         pwc_video_open,
+        .release =      pwc_video_close,
+        .read =         pwc_video_read,
+        .poll =         pwc_video_poll,
+        .mmap =         pwc_video_mmap,
+        .unlocked_ioctl = video_ioctl2,
+};
+static struct video_device pwc_template = {
+        .name =         "Philips Webcam",       /* Filled in later */
+        .release =      pwc_video_release,
+        .fops =         &pwc_fops,
+        .ioctl_ops =    &pwc_ioctl_ops,
+};
+
+/***************************************************************************/
+/* Private functions */
+
+struct pwc_frame_buf *pwc_get_next_fill_buf(struct pwc_device *pdev)
+{
+        unsigned long flags = 0;
+        struct pwc_frame_buf *buf = NULL;
+
+        spin_lock_irqsave(&pdev->queued_bufs_lock, flags);
+        if (list_empty(&pdev->queued_bufs))
+                goto leave;
+
+        buf = list_entry(pdev->queued_bufs.next, struct pwc_frame_buf, list);
+        list_del(&buf->list);
+leave:
+        spin_unlock_irqrestore(&pdev->queued_bufs_lock, flags);
+        return buf;
+}
+
+static void pwc_snapshot_button(struct pwc_device *pdev, int down)
+{
+        if (down) {
+                PWC_TRACE("Snapshot button pressed.\n");
+                pdev->snapshot_button_status = 1;
+        } else {
+                PWC_TRACE("Snapshot button released.\n");
+        }
+
+#ifdef CONFIG_USB_PWC_INPUT_EVDEV
+        if (pdev->button_dev) {
+                input_report_key(pdev->button_dev, KEY_CAMERA, down);
+                input_sync(pdev->button_dev);
+        }
+#endif
+}
+
+static void pwc_frame_complete(struct pwc_device *pdev)
+{
+        struct pwc_frame_buf *fbuf = pdev->fill_buf;
+
+        /* The ToUCam Fun CMOS sensor causes the firmware to send 2 or 3 bogus
+           frames on the USB wire after an exposure change. This conditition is
+           however detected  in the cam and a bit is set in the header.
+           */
+        if (pdev->type == 730) {
+                unsigned char *ptr = (unsigned char *)fbuf->data;
+
+                if (ptr[1] == 1 && ptr[0] & 0x10) {
+                        PWC_TRACE("Hyundai CMOS sensor bug. Dropping frame.\n");
+                        pdev->drop_frames += 2;
+                }
+                if ((ptr[0] ^ pdev->vmirror) & 0x01) {
+                        pwc_snapshot_button(pdev, ptr[0] & 0x01);
+                }
+                if ((ptr[0] ^ pdev->vmirror) & 0x02) {
+                        if (ptr[0] & 0x02)
+                                PWC_TRACE("Image is mirrored.\n");
+                        else
+                                PWC_TRACE("Image is normal.\n");
+                }
+                pdev->vmirror = ptr[0] & 0x03;
+                /* Sometimes the trailer of the 730 is still sent as a 4 byte packet
+                   after a short frame; this condition is filtered out specifically. A 4 byte
+                   frame doesn't make sense anyway.
+                   So we get either this sequence:
+                   drop_bit set -> 4 byte frame -> short frame -> good frame
+                   Or this one:
+                   drop_bit set -> short frame -> good frame
+                   So we drop either 3 or 2 frames in all!
+                   */
+                if (fbuf->filled == 4)
+                        pdev->drop_frames++;
+        } else if (pdev->type == 740 || pdev->type == 720) {
+                unsigned char *ptr = (unsigned char *)fbuf->data;
+                if ((ptr[0] ^ pdev->vmirror) & 0x01) {
+                        pwc_snapshot_button(pdev, ptr[0] & 0x01);
+                }
+                pdev->vmirror = ptr[0] & 0x03;
+        }
+
+        /* In case we were instructed to drop the frame, do so silently. */
+        if (pdev->drop_frames > 0) {
+                pdev->drop_frames--;
+        } else {
+                /* Check for underflow first */
+                if (fbuf->filled < pdev->frame_total_size) {
+                        PWC_DEBUG_FLOW("Frame buffer underflow (%d bytes);"
+                                       " discarded.\n", fbuf->filled);
+                } else {
+                        fbuf->vb.v4l2_buf.field = V4L2_FIELD_NONE;
+                        fbuf->vb.v4l2_buf.sequence = pdev->vframe_count;
+                        vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
+                        pdev->fill_buf = NULL;
+                        pdev->vsync = 0;
+                }
+        } /* !drop_frames */
+        pdev->vframe_count++;
+}
+
+/* This gets called for the Isochronous pipe (video). This is done in
+ * interrupt time, so it has to be fast, not crash, and not stall. Neat.
+ */
+static void pwc_isoc_handler(struct urb *urb)
+{
+        struct pwc_device *pdev = (struct pwc_device *)urb->context;
+        int i, fst, flen;
+        unsigned char *iso_buf = NULL;
+
+        if (urb->status == -ENOENT || urb->status == -ECONNRESET ||
+            urb->status == -ESHUTDOWN) {
+                PWC_DEBUG_OPEN("URB (%p) unlinked %ssynchronuously.\n", urb, urb->status == -ENOENT ? "" : "a");
+                return;
+        }
+
+        if (pdev->fill_buf == NULL)
+                pdev->fill_buf = pwc_get_next_fill_buf(pdev);
+
+        if (urb->status != 0) {
+                const char *errmsg;
+
+                errmsg = "Unknown";
+                switch(urb->status) {
+                        case -ENOSR:            errmsg = "Buffer error (overrun)"; break;
+                        case -EPIPE:            errmsg = "Stalled (device not responding)"; break;
+                        case -EOVERFLOW:        errmsg = "Babble (bad cable?)"; break;
+                        case -EPROTO:           errmsg = "Bit-stuff error (bad cable?)"; break;
+                        case -EILSEQ:           errmsg = "CRC/Timeout (could be anything)"; break;
+                        case -ETIME:            errmsg = "Device does not respond"; break;
+                }
+                PWC_ERROR("pwc_isoc_handler() called with status %d [%s].\n",
+                          urb->status, errmsg);
+                /* Give up after a number of contiguous errors */
+                if (++pdev->visoc_errors > MAX_ISOC_ERRORS)
+                {
+                        PWC_ERROR("Too many ISOC errors, bailing out.\n");
+                        if (pdev->fill_buf) {
+                                vb2_buffer_done(&pdev->fill_buf->vb,
+                                                VB2_BUF_STATE_ERROR);
+                                pdev->fill_buf = NULL;
+                        }
+                }
+                pdev->vsync = 0; /* Drop the current frame */
+                goto handler_end;
+        }
+
+        /* Reset ISOC error counter. We did get here, after all. */
+        pdev->visoc_errors = 0;
+
+        /* vsync: 0 = don't copy data
+                  1 = sync-hunt
+                  2 = synched
+         */
+        /* Compact data */
+        for (i = 0; i < urb->number_of_packets; i++) {
+                fst  = urb->iso_frame_desc[i].status;
+                flen = urb->iso_frame_desc[i].actual_length;
+                iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+                if (fst != 0) {
+                        PWC_ERROR("Iso frame %d has error %d\n", i, fst);
+                        continue;
+                }
+                if (flen > 0 && pdev->vsync) {
+                        struct pwc_frame_buf *fbuf = pdev->fill_buf;
+
+                        if (pdev->vsync == 1) {
+                                do_gettimeofday(&fbuf->vb.v4l2_buf.timestamp);
+                                pdev->vsync = 2;
+                        }
+
+                        if (flen + fbuf->filled > pdev->frame_total_size) {
+                                PWC_ERROR("Frame overflow (%d > %d)\n",
+                                          flen + fbuf->filled,
+                                          pdev->frame_total_size);
+                                pdev->vsync = 0; /* Let's wait for an EOF */
+                        } else {
+                                memcpy(fbuf->data + fbuf->filled, iso_buf,
+                                       flen);
+                                fbuf->filled += flen;
+                        }
+                }
+                if (flen < pdev->vlast_packet_size) {
+                        /* Shorter packet... end of frame */
+                        if (pdev->vsync == 2)
+                                pwc_frame_complete(pdev);
+                        if (pdev->fill_buf == NULL)
+                                pdev->fill_buf = pwc_get_next_fill_buf(pdev);
+                        if (pdev->fill_buf) {
+                                pdev->fill_buf->filled = 0;
+                                pdev->vsync = 1;
+                        }
+                }
+                pdev->vlast_packet_size = flen;
+        }
+
+handler_end:
+        i = usb_submit_urb(urb, GFP_ATOMIC);
+        if (i != 0)
+                PWC_ERROR("Error (%d) re-submitting urb in pwc_isoc_handler.\n", i);
+}
+
+static int pwc_isoc_init(struct pwc_device *pdev)
+{
+        struct usb_device *udev;
+        struct urb *urb;
+        int i, j, ret;
+        struct usb_interface *intf;
+        struct usb_host_interface *idesc = NULL;
+
+        if (pdev->iso_init)
+                return 0;
+
+        pdev->vsync = 0;
+        pdev->vlast_packet_size = 0;
+        pdev->fill_buf = NULL;
+        pdev->vframe_count = 0;
+        pdev->visoc_errors = 0;
+        udev = pdev->udev;
+
+        /* Get the current alternate interface, adjust packet size */
+        intf = usb_ifnum_to_if(udev, 0);
+        if (intf)
+                idesc = usb_altnum_to_altsetting(intf, pdev->valternate);
+        if (!idesc)
+                return -EIO;
+
+        /* Search video endpoint */
+        pdev->vmax_packet_size = -1;
+        for (i = 0; i < idesc->desc.bNumEndpoints; i++) {
+                if ((idesc->endpoint[i].desc.bEndpointAddress & 0xF) == pdev->vendpoint) {
+                        pdev->vmax_packet_size = le16_to_cpu(idesc->endpoint[i].desc.wMaxPacketSize);
+                        break;
+                }
+        }
+
+        if (pdev->vmax_packet_size < 0 || pdev->vmax_packet_size > ISO_MAX_FRAME_SIZE) {
+                PWC_ERROR("Failed to find packet size for video endpoint in current alternate setting.\n");
+                return -ENFILE; /* Odd error, that should be noticeable */
+        }
+
+        /* Set alternate interface */
+        ret = 0;
+        PWC_DEBUG_OPEN("Setting alternate interface %d\n", pdev->valternate);
+        ret = usb_set_interface(pdev->udev, 0, pdev->valternate);
+        if (ret < 0)
+                return ret;
+
+        /* Allocate and init Isochronuous urbs */
+        for (i = 0; i < MAX_ISO_BUFS; i++) {
+                urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
+                if (urb == NULL) {
+                        PWC_ERROR("Failed to allocate urb %d\n", i);
+                        pdev->iso_init = 1;
+                        pwc_isoc_cleanup(pdev);
+                        return -ENOMEM;
+                }
+                pdev->urbs[i] = urb;
+                PWC_DEBUG_MEMORY("Allocated URB at 0x%p\n", urb);
+
+                urb->interval = 1; // devik
+                urb->dev = udev;
+                urb->pipe = usb_rcvisocpipe(udev, pdev->vendpoint);
+                urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
+                urb->transfer_buffer = usb_alloc_coherent(udev,
+                                                          ISO_BUFFER_SIZE,
+                                                          GFP_KERNEL,
+                                                          &urb->transfer_dma);
+                if (urb->transfer_buffer == NULL) {
+                        PWC_ERROR("Failed to allocate urb buffer %d\n", i);
+                        pdev->iso_init = 1;
+                        pwc_isoc_cleanup(pdev);
+                        return -ENOMEM;
+                }
+                urb->transfer_buffer_length = ISO_BUFFER_SIZE;
+                urb->complete = pwc_isoc_handler;
+                urb->context = pdev;
+                urb->start_frame = 0;
+                urb->number_of_packets = ISO_FRAMES_PER_DESC;
+                for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
+                        urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
+                        urb->iso_frame_desc[j].length = pdev->vmax_packet_size;
+                }
+        }
+
+        /* link */
+        for (i = 0; i < MAX_ISO_BUFS; i++) {
+                ret = usb_submit_urb(pdev->urbs[i], GFP_KERNEL);
+                if (ret) {
+                        PWC_ERROR("isoc_init() submit_urb %d failed with error %d\n", i, ret);
+                        pdev->iso_init = 1;
+                        pwc_isoc_cleanup(pdev);
+                        return ret;
+                }
+                PWC_DEBUG_MEMORY("URB 0x%p submitted.\n", pdev->urbs[i]);
+        }
+
+        /* All is done... */
+        pdev->iso_init = 1;
+        PWC_DEBUG_OPEN("<< pwc_isoc_init()\n");
+        return 0;
+}
+
+static void pwc_iso_stop(struct pwc_device *pdev)
+{
+        int i;
+
+        /* Unlinking ISOC buffers one by one */
+        for (i = 0; i < MAX_ISO_BUFS; i++) {
+                if (pdev->urbs[i]) {
+                        PWC_DEBUG_MEMORY("Unlinking URB %p\n", pdev->urbs[i]);
+                        usb_kill_urb(pdev->urbs[i]);
+                }
+        }
+}
+
+static void pwc_iso_free(struct pwc_device *pdev)
+{
+        int i;
+
+        /* Freeing ISOC buffers one by one */
+        for (i = 0; i < MAX_ISO_BUFS; i++) {
+                if (pdev->urbs[i]) {
+                        PWC_DEBUG_MEMORY("Freeing URB\n");
+                        if (pdev->urbs[i]->transfer_buffer) {
+                                usb_free_coherent(pdev->udev,
+                                        pdev->urbs[i]->transfer_buffer_length,
+                                        pdev->urbs[i]->transfer_buffer,
+                                        pdev->urbs[i]->transfer_dma);
+                        }
+                        usb_free_urb(pdev->urbs[i]);
+                        pdev->urbs[i] = NULL;
+                }
+        }
+}
+
+static void pwc_isoc_cleanup(struct pwc_device *pdev)
+{
+        PWC_DEBUG_OPEN(">> pwc_isoc_cleanup()\n");
+
+        if (pdev->iso_init == 0)
+                return;
+
+        pwc_iso_stop(pdev);
+        pwc_iso_free(pdev);
+        usb_set_interface(pdev->udev, 0, 0);
+
+        pdev->iso_init = 0;
+        PWC_DEBUG_OPEN("<< pwc_isoc_cleanup()\n");
+}
+
+/*
+ * Release all queued buffers, no need to take queued_bufs_lock, since all
+ * iso urbs have been killed when we're called so pwc_isoc_handler won't run.
+ */
+static void pwc_cleanup_queued_bufs(struct pwc_device *pdev)
+{
+        while (!list_empty(&pdev->queued_bufs)) {
+                struct pwc_frame_buf *buf;
+
+                buf = list_entry(pdev->queued_bufs.next, struct pwc_frame_buf,
+                                 list);
+                list_del(&buf->list);
+                vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+        }
+}
+
+/*********
+ * sysfs
+ *********/
+static struct pwc_device *cd_to_pwc(struct device *cd)
+{
+        struct video_device *vdev = to_video_device(cd);
+        return video_get_drvdata(vdev);
+}
+
+static ssize_t show_pan_tilt(struct device *class_dev,
+                             struct device_attribute *attr, char *buf)
+{
+        struct pwc_device *pdev = cd_to_pwc(class_dev);
+        return sprintf(buf, "%d %d\n", pdev->pan_angle, pdev->tilt_angle);
+}
+
+static ssize_t store_pan_tilt(struct device *class_dev,
+                              struct device_attribute *attr,
+                              const char *buf, size_t count)
+{
+        struct pwc_device *pdev = cd_to_pwc(class_dev);
+        int pan, tilt;
+        int ret = -EINVAL;
+
+        if (strncmp(buf, "reset", 5) == 0)
+                ret = pwc_mpt_reset(pdev, 0x3);
+
+        else if (sscanf(buf, "%d %d", &pan, &tilt) > 0)
+                ret = pwc_mpt_set_angle(pdev, pan, tilt);
+
+        if (ret < 0)
+                return ret;
+        return strlen(buf);
+}
+static DEVICE_ATTR(pan_tilt, S_IRUGO | S_IWUSR, show_pan_tilt,
+                   store_pan_tilt);
+
+static ssize_t show_snapshot_button_status(struct device *class_dev,
+                                           struct device_attribute *attr, char *buf)
+{
+        struct pwc_device *pdev = cd_to_pwc(class_dev);
+        int status = pdev->snapshot_button_status;
+        pdev->snapshot_button_status = 0;
+        return sprintf(buf, "%d\n", status);
+}
+
+static DEVICE_ATTR(button, S_IRUGO | S_IWUSR, show_snapshot_button_status,
+                   NULL);
+
+static int pwc_create_sysfs_files(struct pwc_device *pdev)
+{
+        int rc;
+
+        rc = device_create_file(&pdev->vdev.dev, &dev_attr_button);
+        if (rc)
+                goto err;
+        if (pdev->features & FEATURE_MOTOR_PANTILT) {
+                rc = device_create_file(&pdev->vdev.dev, &dev_attr_pan_tilt);
+                if (rc)
+                        goto err_button;
+        }
+
+        return 0;
+
+err_button:
+        device_remove_file(&pdev->vdev.dev, &dev_attr_button);
+err:
+        PWC_ERROR("Could not create sysfs files.\n");
+        return rc;
+}
+
+static void pwc_remove_sysfs_files(struct pwc_device *pdev)
+{
+        if (pdev->features & FEATURE_MOTOR_PANTILT)
+                device_remove_file(&pdev->vdev.dev, &dev_attr_pan_tilt);
+        device_remove_file(&pdev->vdev.dev, &dev_attr_button);
+}
+
+#ifdef CONFIG_USB_PWC_DEBUG
+static const char *pwc_sensor_type_to_string(unsigned int sensor_type)
+{
+        switch(sensor_type) {
+                case 0x00:
+                        return "Hyundai CMOS sensor";
+                case 0x20:
+                        return "Sony CCD sensor + TDA8787";
+                case 0x2E:
+                        return "Sony CCD sensor + Exas 98L59";
+                case 0x2F:
+                        return "Sony CCD sensor + ADI 9804";
+                case 0x30:
+                        return "Sharp CCD sensor + TDA8787";
+                case 0x3E:
+                        return "Sharp CCD sensor + Exas 98L59";
+                case 0x3F:
+                        return "Sharp CCD sensor + ADI 9804";
+                case 0x40:
+                        return "UPA 1021 sensor";
+                case 0x100:
+                        return "VGA sensor";
+                case 0x101:
+                        return "PAL MR sensor";
+                default:
+                        return "unknown type of sensor";
+        }
+}
+#endif
+
+/***************************************************************************/
+/* Video4Linux functions */
+
+static int pwc_video_open(struct file *file)
+{
+        struct video_device *vdev = video_devdata(file);
+        struct pwc_device *pdev;
+
+        PWC_DEBUG_OPEN(">> video_open called(vdev = 0x%p).\n", vdev);
+
+        pdev = video_get_drvdata(vdev);
+        if (!pdev->udev)
+                return -ENODEV;
+
+        file->private_data = vdev;
+        PWC_DEBUG_OPEN("<< video_open() returns 0.\n");
+        return 0;
+}
+
+static void pwc_video_release(struct video_device *vfd)
+{
+        struct pwc_device *pdev = container_of(vfd, struct pwc_device, vdev);
+        int hint;
+
+        /* search device_hint[] table if we occupy a slot, by any chance */
+        for (hint = 0; hint < MAX_DEV_HINTS; hint++)
+                if (device_hint[hint].pdev == pdev)
+                        device_hint[hint].pdev = NULL;
+
+        /* Free intermediate decompression buffer & tables */
+        if (pdev->decompress_data != NULL) {
+                PWC_DEBUG_MEMORY("Freeing decompression buffer at %p.\n",
+                                 pdev->decompress_data);
+                kfree(pdev->decompress_data);
+                pdev->decompress_data = NULL;
+        }
+
+        v4l2_ctrl_handler_free(&pdev->ctrl_handler);
+
+        kfree(pdev);
+}
+
+static int pwc_video_close(struct file *file)
+{
+        struct video_device *vdev = file->private_data;
+        struct pwc_device *pdev;
+
+        PWC_DEBUG_OPEN(">> video_close called(vdev = 0x%p).\n", vdev);
+
+        pdev = video_get_drvdata(vdev);
+        if (pdev->capt_file == file) {
+                vb2_queue_release(&pdev->vb_queue);
+                pdev->capt_file = NULL;
+        }
+
+        PWC_DEBUG_OPEN("<< video_close()\n");
+        return 0;
+}
+
+static ssize_t pwc_video_read(struct file *file, char __user *buf,
+                              size_t count, loff_t *ppos)
+{
+        struct video_device *vdev = file->private_data;
+        struct pwc_device *pdev = video_get_drvdata(vdev);
+
+        if (!pdev->udev)
+                return -ENODEV;
+
+        if (pdev->capt_file != NULL &&
+            pdev->capt_file != file)
+                return -EBUSY;
+
+        pdev->capt_file = file;
+
+        return vb2_read(&pdev->vb_queue, buf, count, ppos,
+                        file->f_flags & O_NONBLOCK);
+}
+
+static unsigned int pwc_video_poll(struct file *file, poll_table *wait)
+{
+        struct video_device *vdev = file->private_data;
+        struct pwc_device *pdev = video_get_drvdata(vdev);
+
+        if (!pdev->udev)
+                return POLL_ERR;
+
+        return vb2_poll(&pdev->vb_queue, file, wait);
+}
+
+static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma)
+{
+        struct video_device *vdev = file->private_data;
+        struct pwc_device *pdev = video_get_drvdata(vdev);
+
+        if (pdev->capt_file != file)
+                return -EBUSY;
+
+        return vb2_mmap(&pdev->vb_queue, vma);
+}
+
+/***************************************************************************/
+/* Videobuf2 operations */
+
+static int queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
+                                unsigned int *nplanes, unsigned long sizes[],
+                                void *alloc_ctxs[])
+{
+        struct pwc_device *pdev = vb2_get_drv_priv(vq);
+
+        if (*nbuffers < MIN_FRAMES)
+                *nbuffers = MIN_FRAMES;
+        else if (*nbuffers > MAX_FRAMES)
+                *nbuffers = MAX_FRAMES;
+
+        *nplanes = 1;
+
+        sizes[0] = PAGE_ALIGN((pdev->abs_max.x * pdev->abs_max.y * 3) / 2);
+
+        return 0;
+}
+
+static int buffer_init(struct vb2_buffer *vb)
+{
+        struct pwc_frame_buf *buf = container_of(vb, struct pwc_frame_buf, vb);
+
+        /* need vmalloc since frame buffer > 128K */
+        buf->data = vzalloc(PWC_FRAME_SIZE);
+        if (buf->data == NULL)
+                return -ENOMEM;
+
+        return 0;
+}
+
+static int buffer_prepare(struct vb2_buffer *vb)
+{
+        struct pwc_device *pdev = vb2_get_drv_priv(vb->vb2_queue);
+
+        /* Don't allow queing new buffers after device disconnection */
+        if (!pdev->udev)
+                return -ENODEV;
+
+        return 0;
+}
+
+static int buffer_finish(struct vb2_buffer *vb)
+{
+        struct pwc_device *pdev = vb2_get_drv_priv(vb->vb2_queue);
+        struct pwc_frame_buf *buf = container_of(vb, struct pwc_frame_buf, vb);
+
+        /*
+         * Application has called dqbuf and is getting back a buffer we've
+         * filled, take the pwc data we've stored in buf->data and decompress
+         * it into a usable format, storing the result in the vb2_buffer
+         */
+        return pwc_decompress(pdev, buf);
+}
+
+static void buffer_cleanup(struct vb2_buffer *vb)
+{
+        struct pwc_frame_buf *buf = container_of(vb, struct pwc_frame_buf, vb);
+
+        vfree(buf->data);
+}
+
+static void buffer_queue(struct vb2_buffer *vb)
+{
+        struct pwc_device *pdev = vb2_get_drv_priv(vb->vb2_queue);
+        struct pwc_frame_buf *buf = container_of(vb, struct pwc_frame_buf, vb);
+        unsigned long flags = 0;
+
+        spin_lock_irqsave(&pdev->queued_bufs_lock, flags);
+        list_add_tail(&buf->list, &pdev->queued_bufs);
+        spin_unlock_irqrestore(&pdev->queued_bufs_lock, flags);
+}
+
+static int start_streaming(struct vb2_queue *vq)
+{
+        struct pwc_device *pdev = vb2_get_drv_priv(vq);
+
+        if (!pdev->udev)
+                return -ENODEV;
+
+        /* Turn on camera and set LEDS on */
+        pwc_camera_power(pdev, 1);
+        if (pdev->power_save) {
+                /* Restore video mode */
+                pwc_set_video_mode(pdev, pdev->view.x, pdev->view.y,
+                                   pdev->vframes, pdev->vcompression,
+                                   pdev->vsnapshot);
+        }
+        pwc_set_leds(pdev, led_on, led_off);
+
+        return pwc_isoc_init(pdev);
+}
+
+static int stop_streaming(struct vb2_queue *vq)
+{
+        struct pwc_device *pdev = vb2_get_drv_priv(vq);
+
+        if (pdev->udev) {
+                pwc_set_leds(pdev, 0, 0);
+                pwc_camera_power(pdev, 0);
+                pwc_isoc_cleanup(pdev);
+        }
+        pwc_cleanup_queued_bufs(pdev);
+
+        return 0;
+}
+
+static void pwc_lock(struct vb2_queue *vq)
+{
+        struct pwc_device *pdev = vb2_get_drv_priv(vq);
+        mutex_lock(&pdev->modlock);
+}
+
+static void pwc_unlock(struct vb2_queue *vq)
+{
+        struct pwc_device *pdev = vb2_get_drv_priv(vq);
+        mutex_unlock(&pdev->modlock);
+}
+
+static struct vb2_ops pwc_vb_queue_ops = {
+        .queue_setup            = queue_setup,
+        .buf_init               = buffer_init,
+        .buf_prepare            = buffer_prepare,
+        .buf_finish             = buffer_finish,
+        .buf_cleanup            = buffer_cleanup,
+        .buf_queue              = buffer_queue,
+        .start_streaming        = start_streaming,
+        .stop_streaming         = stop_streaming,
+        .wait_prepare           = pwc_unlock,
+        .wait_finish            = pwc_lock,
+};
+
+/***************************************************************************/
+/* USB functions */
+
+/* This function gets called when a new device is plugged in or the usb core
+ * is loaded.
+ */
+
+static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+        struct usb_device *udev = interface_to_usbdev(intf);
+        struct pwc_device *pdev = NULL;
+        int vendor_id, product_id, type_id;
+        int hint, rc;
+        int features = 0;
+        int video_nr = -1; /* default: use next available device */
+        int my_power_save = power_save;
+        char serial_number[30], *name;
+
+        vendor_id = le16_to_cpu(udev->descriptor.idVendor);
+        product_id = le16_to_cpu(udev->descriptor.idProduct);
+
+        /* Check if we can handle this device */
+        PWC_DEBUG_PROBE("probe() called [%04X %04X], if %d\n",
+                vendor_id, product_id,
+                intf->altsetting->desc.bInterfaceNumber);
+
+        /* the interfaces are probed one by one. We are only interested in the
+           video interface (0) now.
+           Interface 1 is the Audio Control, and interface 2 Audio itself.
+         */
+        if (intf->altsetting->desc.bInterfaceNumber > 0)
+                return -ENODEV;
+
+        if (vendor_id == 0x0471) {
+                switch (product_id) {
+                case 0x0302:
+                        PWC_INFO("Philips PCA645VC USB webcam detected.\n");
+                        name = "Philips 645 webcam";
+                        type_id = 645;
+                        break;
+                case 0x0303:
+                        PWC_INFO("Philips PCA646VC USB webcam detected.\n");
+                        name = "Philips 646 webcam";
+                        type_id = 646;
+                        break;
+                case 0x0304:
+                        PWC_INFO("Askey VC010 type 2 USB webcam detected.\n");
+                        name = "Askey VC010 webcam";
+                        type_id = 646;
+                        break;
+                case 0x0307:
+                        PWC_INFO("Philips PCVC675K (Vesta) USB webcam detected.\n");
+                        name = "Philips 675 webcam";
+                        type_id = 675;
+                        break;
+                case 0x0308:
+                        PWC_INFO("Philips PCVC680K (Vesta Pro) USB webcam detected.\n");
+                        name = "Philips 680 webcam";
+                        type_id = 680;
+                        break;
+                case 0x030C:
+                        PWC_INFO("Philips PCVC690K (Vesta Pro Scan) USB webcam detected.\n");
+                        name = "Philips 690 webcam";
+                        type_id = 690;
+                        break;
+                case 0x0310:
+                        PWC_INFO("Philips PCVC730K (ToUCam Fun)/PCVC830 (ToUCam II) USB webcam detected.\n");
+                        name = "Philips 730 webcam";
+                        type_id = 730;
+                        break;
+                case 0x0311:
+                        PWC_INFO("Philips PCVC740K (ToUCam Pro)/PCVC840 (ToUCam II) USB webcam detected.\n");
+                        name = "Philips 740 webcam";
+                        type_id = 740;
+                        break;
+                case 0x0312:
+                        PWC_INFO("Philips PCVC750K (ToUCam Pro Scan) USB webcam detected.\n");
+                        name = "Philips 750 webcam";
+                        type_id = 750;
+                        break;
+                case 0x0313:
+                        PWC_INFO("Philips PCVC720K/40 (ToUCam XS) USB webcam detected.\n");
+                        name = "Philips 720K/40 webcam";
+                        type_id = 720;
+                        break;
+                case 0x0329:
+                        PWC_INFO("Philips SPC 900NC USB webcam detected.\n");
+                        name = "Philips SPC 900NC webcam";
+                        type_id = 740;
+                        break;
+                default:
+                        return -ENODEV;
+                        break;
+                }
+        }
+        else if (vendor_id == 0x069A) {
+                switch(product_id) {
+                case 0x0001:
+                        PWC_INFO("Askey VC010 type 1 USB webcam detected.\n");
+                        name = "Askey VC010 webcam";
+                        type_id = 645;
+                        break;
+                default:
+                        return -ENODEV;
+                        break;
+                }
+        }
+        else if (vendor_id == 0x046d) {
+                switch(product_id) {
+                case 0x08b0:
+                        PWC_INFO("Logitech QuickCam Pro 3000 USB webcam detected.\n");
+                        name = "Logitech QuickCam Pro 3000";
+                        type_id = 740; /* CCD sensor */
+                        break;
+                case 0x08b1:
+                        PWC_INFO("Logitech QuickCam Notebook Pro USB webcam detected.\n");
+                        name = "Logitech QuickCam Notebook Pro";
+                        type_id = 740; /* CCD sensor */
+                        break;
+                case 0x08b2:
+                        PWC_INFO("Logitech QuickCam 4000 Pro USB webcam detected.\n");
+                        name = "Logitech QuickCam Pro 4000";
+                        type_id = 740; /* CCD sensor */
+                        if (my_power_save == -1)
+                                my_power_save = 1;
+                        break;
+                case 0x08b3:
+                        PWC_INFO("Logitech QuickCam Zoom USB webcam detected.\n");
+                        name = "Logitech QuickCam Zoom";
+                        type_id = 740; /* CCD sensor */
+                        break;
+                case 0x08B4:
+                        PWC_INFO("Logitech QuickCam Zoom (new model) USB webcam detected.\n");
+                        name = "Logitech QuickCam Zoom";
+                        type_id = 740; /* CCD sensor */
+                        if (my_power_save == -1)
+                                my_power_save = 1;
+                        break;
+                case 0x08b5:
+                        PWC_INFO("Logitech QuickCam Orbit/Sphere USB webcam detected.\n");
+                        name = "Logitech QuickCam Orbit";
+                        type_id = 740; /* CCD sensor */
+                        if (my_power_save == -1)
+                                my_power_save = 1;
+                        features |= FEATURE_MOTOR_PANTILT;
+                        break;
+                case 0x08b6:
+                        PWC_INFO("Logitech/Cisco VT Camera webcam detected.\n");
+                        name = "Cisco VT Camera";
+                        type_id = 740; /* CCD sensor */
+                        break;
+                case 0x08b7:
+                        PWC_INFO("Logitech ViewPort AV 100 webcam detected.\n");
+                        name = "Logitech ViewPort AV 100";
+                        type_id = 740; /* CCD sensor */
+                        break;
+                case 0x08b8: /* Where this released? */
+                        PWC_INFO("Logitech QuickCam detected (reserved ID).\n");
+                        name = "Logitech QuickCam (res.)";
+                        type_id = 730; /* Assuming CMOS */
+                        break;
+                default:
+                        return -ENODEV;
+                        break;
+                }
+        }
+        else if (vendor_id == 0x055d) {
+                /* I don't know the difference between the C10 and the C30;
+                   I suppose the difference is the sensor, but both cameras
+                   work equally well with a type_id of 675
+                 */
+                switch(product_id) {
+                case 0x9000:
+                        PWC_INFO("Samsung MPC-C10 USB webcam detected.\n");
+                        name = "Samsung MPC-C10";
+                        type_id = 675;
+                        break;
+                case 0x9001:
+                        PWC_INFO("Samsung MPC-C30 USB webcam detected.\n");
+                        name = "Samsung MPC-C30";
+                        type_id = 675;
+                        break;
+                case 0x9002:
+                        PWC_INFO("Samsung SNC-35E (v3.0) USB webcam detected.\n");
+                        name = "Samsung MPC-C30";
+                        type_id = 740;
+                        break;
+                default:
+                        return -ENODEV;
+                        break;
+                }
+        }
+        else if (vendor_id == 0x041e) {
+                switch(product_id) {
+                case 0x400c:
+                        PWC_INFO("Creative Labs Webcam 5 detected.\n");
+                        name = "Creative Labs Webcam 5";
+                        type_id = 730;
+                        if (my_power_save == -1)
+                                my_power_save = 1;
+                        break;
+                case 0x4011:
+                        PWC_INFO("Creative Labs Webcam Pro Ex detected.\n");
+                        name = "Creative Labs Webcam Pro Ex";
+                        type_id = 740;
+                        break;
+                default:
+                        return -ENODEV;
+                        break;
+                }
+        }
+        else if (vendor_id == 0x04cc) {
+                switch(product_id) {
+                case 0x8116:
+                        PWC_INFO("Sotec Afina Eye USB webcam detected.\n");
+                        name = "Sotec Afina Eye";
+                        type_id = 730;
+                        break;
+                default:
+                        return -ENODEV;
+                        break;
+                }
+        }
+        else if (vendor_id == 0x06be) {
+                switch(product_id) {
+                case 0x8116:
+                        /* This is essentially the same cam as the Sotec Afina Eye */
+                        PWC_INFO("AME Co. Afina Eye USB webcam detected.\n");
+                        name = "AME Co. Afina Eye";
+                        type_id = 750;
+                        break;
+                default:
+                        return -ENODEV;
+                        break;
+                }
+
+        }
+        else if (vendor_id == 0x0d81) {
+                switch(product_id) {
+                case 0x1900:
+                        PWC_INFO("Visionite VCS-UC300 USB webcam detected.\n");
+                        name = "Visionite VCS-UC300";
+                        type_id = 740; /* CCD sensor */
+                        break;
+                case 0x1910:
+                        PWC_INFO("Visionite VCS-UM100 USB webcam detected.\n");
+                        name = "Visionite VCS-UM100";
+                        type_id = 730; /* CMOS sensor */
+                        break;
+                default:
+                        return -ENODEV;
+                        break;
+                }
+        }
+        else
+                return -ENODEV; /* Not any of the know types; but the list keeps growing. */
+
+        if (my_power_save == -1)
+                my_power_save = 0;
+
+        memset(serial_number, 0, 30);
+        usb_string(udev, udev->descriptor.iSerialNumber, serial_number, 29);
+        PWC_DEBUG_PROBE("Device serial number is %s\n", serial_number);
+
+        if (udev->descriptor.bNumConfigurations > 1)
+                PWC_WARNING("Warning: more than 1 configuration available.\n");
+
+        /* Allocate structure, initialize pointers, mutexes, etc. and link it to the usb_device */
+        pdev = kzalloc(sizeof(struct pwc_device), GFP_KERNEL);
+        if (pdev == NULL) {
+                PWC_ERROR("Oops, could not allocate memory for pwc_device.\n");
+                return -ENOMEM;
+        }
+        pdev->type = type_id;
+        pdev->vframes = default_fps;
+        strcpy(pdev->serial, serial_number);
+        pdev->features = features;
+        if (vendor_id == 0x046D && product_id == 0x08B5) {
+                /* Logitech QuickCam Orbit
+                   The ranges have been determined experimentally; they may differ from cam to cam.
+                   Also, the exact ranges left-right and up-down are different for my cam
+                  */
+                pdev->angle_range.pan_min  = -7000;
+                pdev->angle_range.pan_max  =  7000;
+                pdev->angle_range.tilt_min = -3000;
+                pdev->angle_range.tilt_max =  2500;
+        }
+        pwc_construct(pdev); /* set min/max sizes correct */
+
+        mutex_init(&pdev->modlock);
+        mutex_init(&pdev->udevlock);
+        spin_lock_init(&pdev->queued_bufs_lock);
+        INIT_LIST_HEAD(&pdev->queued_bufs);
+
+        pdev->udev = udev;
+        pdev->vcompression = pwc_preferred_compression;
+        pdev->power_save = my_power_save;
+
+        /* Init videobuf2 queue structure */
+        memset(&pdev->vb_queue, 0, sizeof(pdev->vb_queue));
+        pdev->vb_queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+        pdev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
+        pdev->vb_queue.drv_priv = pdev;
+        pdev->vb_queue.buf_struct_size = sizeof(struct pwc_frame_buf);
+        pdev->vb_queue.ops = &pwc_vb_queue_ops;
+        pdev->vb_queue.mem_ops = &vb2_vmalloc_memops;
+        vb2_queue_init(&pdev->vb_queue);
+
+        /* Init video_device structure */
+        memcpy(&pdev->vdev, &pwc_template, sizeof(pwc_template));
+        pdev->vdev.parent = &intf->dev;
+        pdev->vdev.lock = &pdev->modlock;
+        strcpy(pdev->vdev.name, name);
+        video_set_drvdata(&pdev->vdev, pdev);
+
+        pdev->release = le16_to_cpu(udev->descriptor.bcdDevice);
+        PWC_DEBUG_PROBE("Release: %04x\n", pdev->release);
+
+        /* Now search device_hint[] table for a match, so we can hint a node number. */
+        for (hint = 0; hint < MAX_DEV_HINTS; hint++) {
+                if (((device_hint[hint].type == -1) || (device_hint[hint].type == pdev->type)) &&
+                     (device_hint[hint].pdev == NULL)) {
+                        /* so far, so good... try serial number */
+                        if ((device_hint[hint].serial_number[0] == '*') || !strcmp(device_hint[hint].serial_number, serial_number)) {
+                                /* match! */
+                                video_nr = device_hint[hint].device_node;
+                                PWC_DEBUG_PROBE("Found hint, will try to register as /dev/video%d\n", video_nr);
+                                break;
+                        }
+                }
+        }
+
+        /* occupy slot */
+        if (hint < MAX_DEV_HINTS)
+                device_hint[hint].pdev = pdev;
+
+        PWC_DEBUG_PROBE("probe() function returning struct at 0x%p.\n", pdev);
+        usb_set_intfdata(intf, pdev);
+
+#ifdef CONFIG_USB_PWC_DEBUG
+        /* Query sensor type */
+        if (pwc_get_cmos_sensor(pdev, &rc) >= 0) {
+                PWC_DEBUG_OPEN("This %s camera is equipped with a %s (%d).\n",
+                                pdev->vdev.name,
+                                pwc_sensor_type_to_string(rc), rc);
+        }
+#endif
+
+        /* Set the leds off */
+        pwc_set_leds(pdev, 0, 0);
+
+        /* Setup intial videomode */
+        rc = pwc_set_video_mode(pdev, pdev->view_max.x, pdev->view_max.y,
+                                pdev->vframes, pdev->vcompression, 0);
+        if (rc)
+                goto err_free_mem;
+
+        /* Register controls (and read default values from camera */
+        rc = pwc_init_controls(pdev);
+        if (rc) {
+                PWC_ERROR("Failed to register v4l2 controls (%d).\n", rc);
+                goto err_free_mem;
+        }
+
+        pdev->vdev.ctrl_handler = &pdev->ctrl_handler;
+
+        /* And powerdown the camera until streaming starts */
+        pwc_camera_power(pdev, 0);
+
+        rc = video_register_device(&pdev->vdev, VFL_TYPE_GRABBER, video_nr);
+        if (rc < 0) {
+                PWC_ERROR("Failed to register as video device (%d).\n", rc);
+                goto err_free_controls;
+        }
+        rc = pwc_create_sysfs_files(pdev);
+        if (rc)
+                goto err_video_unreg;
+
+        PWC_INFO("Registered as %s.\n", video_device_node_name(&pdev->vdev));
+
+#ifdef CONFIG_USB_PWC_INPUT_EVDEV
+        /* register webcam snapshot button input device */
+        pdev->button_dev = input_allocate_device();
+        if (!pdev->button_dev) {
+                PWC_ERROR("Err, insufficient memory for webcam snapshot button device.");
+                rc = -ENOMEM;
+                pwc_remove_sysfs_files(pdev);
+                goto err_video_unreg;
+        }
+
+        usb_make_path(udev, pdev->button_phys, sizeof(pdev->button_phys));
+        strlcat(pdev->button_phys, "/input0", sizeof(pdev->button_phys));
+
+        pdev->button_dev->name = "PWC snapshot button";
+        pdev->button_dev->phys = pdev->button_phys;
+        usb_to_input_id(pdev->udev, &pdev->button_dev->id);
+        pdev->button_dev->dev.parent = &pdev->udev->dev;
+        pdev->button_dev->evbit[0] = BIT_MASK(EV_KEY);
+        pdev->button_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
+
+        rc = input_register_device(pdev->button_dev);
+        if (rc) {
+                input_free_device(pdev->button_dev);
+                pdev->button_dev = NULL;
+                pwc_remove_sysfs_files(pdev);
+                goto err_video_unreg;
+        }
+#endif
+
+        return 0;
+
+err_video_unreg:
+        if (hint < MAX_DEV_HINTS)
+                device_hint[hint].pdev = NULL;
+        video_unregister_device(&pdev->vdev);
+err_free_controls:
+        v4l2_ctrl_handler_free(&pdev->ctrl_handler);
+err_free_mem:
+        usb_set_intfdata(intf, NULL);
+        kfree(pdev);
+        return rc;
+}
+
+/* The user yanked out the cable... */
+static void usb_pwc_disconnect(struct usb_interface *intf)
+{
+        struct pwc_device *pdev  = usb_get_intfdata(intf);
+
+        mutex_lock(&pdev->udevlock);
+        mutex_lock(&pdev->modlock);
+
+        usb_set_intfdata(intf, NULL);
+        /* No need to keep the urbs around after disconnection */
+        pwc_isoc_cleanup(pdev);
+        pwc_cleanup_queued_bufs(pdev);
+        pdev->udev = NULL;
+
+        mutex_unlock(&pdev->modlock);
+        mutex_unlock(&pdev->udevlock);
+
+        pwc_remove_sysfs_files(pdev);
+        video_unregister_device(&pdev->vdev);
+
+#ifdef CONFIG_USB_PWC_INPUT_EVDEV
+        if (pdev->button_dev)
+                input_unregister_device(pdev->button_dev);
+#endif
+}
+
+
+/*
+ * Initialization code & module stuff
+ */
+
+static int fps;
+static int compression = -1;
+static int leds[2] = { -1, -1 };
+static unsigned int leds_nargs;
+static char *dev_hint[MAX_DEV_HINTS];
+static unsigned int dev_hint_nargs;
+
+module_param(fps, int, 0444);
+#ifdef CONFIG_USB_PWC_DEBUG
+module_param_named(trace, pwc_trace, int, 0644);
+#endif
+module_param(power_save, int, 0644);
+module_param(compression, int, 0444);
+module_param_array(leds, int, &leds_nargs, 0444);
+module_param_array(dev_hint, charp, &dev_hint_nargs, 0444);
+
+MODULE_PARM_DESC(fps, "Initial frames per second. Varies with model, useful range 5-30");
+#ifdef CONFIG_USB_PWC_DEBUG
+MODULE_PARM_DESC(trace, "For debugging purposes");
+#endif
+MODULE_PARM_DESC(power_save, "Turn power saving for new cameras on or off");
+MODULE_PARM_DESC(compression, "Preferred compression quality. Range 0 (uncompressed) to 3 (high compression)");
+MODULE_PARM_DESC(leds, "LED on,off time in milliseconds");
+MODULE_PARM_DESC(dev_hint, "Device node hints");
+
+MODULE_DESCRIPTION("Philips & OEM USB webcam driver");
+MODULE_AUTHOR("Luc Saillard <luc@saillard.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("pwcx");
+MODULE_VERSION( PWC_VERSION );
+
+static int __init usb_pwc_init(void)
+{
+        int i;
+
+#ifdef CONFIG_USB_PWC_DEBUG
+        PWC_INFO("Philips webcam module version " PWC_VERSION " loaded.\n");
+        PWC_INFO("Supports Philips PCA645/646, PCVC675/680/690, PCVC720[40]/730/740/750 & PCVC830/840.\n");
+        PWC_INFO("Also supports the Askey VC010, various Logitech Quickcams, Samsung MPC-C10 and MPC-C30,\n");
+        PWC_INFO("the Creative WebCam 5 & Pro Ex, SOTEC Afina Eye and Visionite VCS-UC300 and VCS-UM100.\n");
+
+        if (pwc_trace >= 0) {
+                PWC_DEBUG_MODULE("Trace options: 0x%04x\n", pwc_trace);
+        }
+#endif
+
+        if (fps) {
+                if (fps < 4 || fps > 30) {
+                        PWC_ERROR("Framerate out of bounds (4-30).\n");
+                        return -EINVAL;
+                }
+                default_fps = fps;
+                PWC_DEBUG_MODULE("Default framerate set to %d.\n", default_fps);
+        }
+
+        if (compression >= 0) {
+                if (compression > 3) {
+                        PWC_ERROR("Invalid compression setting; use a number between 0 (uncompressed) and 3 (high).\n");
+                        return -EINVAL;
+                }
+                pwc_preferred_compression = compression;
+                PWC_DEBUG_MODULE("Preferred compression set to %d.\n", pwc_preferred_compression);
+        }
+        if (leds[0] >= 0)
+                led_on = leds[0];
+        if (leds[1] >= 0)
+                led_off = leds[1];
+
+        /* Big device node whoopla. Basically, it allows you to assign a
+           device node (/dev/videoX) to a camera, based on its type
+           & serial number. The format is [type[.serialnumber]:]node.
+
+           Any camera that isn't matched by these rules gets the next
+           available free device node.
+         */
+        for (i = 0; i < MAX_DEV_HINTS; i++) {
+                char *s, *colon, *dot;
+
+                /* This loop also initializes the array */
+                device_hint[i].pdev = NULL;
+                s = dev_hint[i];
+                if (s != NULL && *s != '\0') {
+                        device_hint[i].type = -1; /* wildcard */
+                        strcpy(device_hint[i].serial_number, "*");
+
+                        /* parse string: chop at ':' & '/' */
+                        colon = dot = s;
+                        while (*colon != '\0' && *colon != ':')
+                                colon++;
+                        while (*dot != '\0' && *dot != '.')
+                                dot++;
+                        /* Few sanity checks */
+                        if (*dot != '\0' && dot > colon) {
+                                PWC_ERROR("Malformed camera hint: the colon must be after the dot.\n");
+                                return -EINVAL;
+                        }
+
+                        if (*colon == '\0') {
+                                /* No colon */
+                                if (*dot != '\0') {
+                                        PWC_ERROR("Malformed camera hint: no colon + device node given.\n");
+                                        return -EINVAL;
+                                }
+                                else {
+                                        /* No type or serial number specified, just a number. */
+                                        device_hint[i].device_node =
+                                                simple_strtol(s, NULL, 10);
+                                }
+                        }
+                        else {
+                                /* There's a colon, so we have at least a type and a device node */
+                                device_hint[i].type =
+                                        simple_strtol(s, NULL, 10);
+                                device_hint[i].device_node =
+                                        simple_strtol(colon + 1, NULL, 10);
+                                if (*dot != '\0') {
+                                        /* There's a serial number as well */
+                                        int k;
+
+                                        dot++;
+                                        k = 0;
+                                        while (*dot != ':' && k < 29) {
+                                                device_hint[i].serial_number[k++] = *dot;
+                                                dot++;
+                                        }
+                                        device_hint[i].serial_number[k] = '\0';
+                                }
+                        }
+                        PWC_TRACE("device_hint[%d]:\n", i);
+                        PWC_TRACE("  type    : %d\n", device_hint[i].type);
+                        PWC_TRACE("  serial# : %s\n", device_hint[i].serial_number);
+                        PWC_TRACE("  node    : %d\n", device_hint[i].device_node);
+                }
+                else
+                        device_hint[i].type = 0; /* not filled */
+        } /* ..for MAX_DEV_HINTS */
+
+        PWC_DEBUG_PROBE("Registering driver at address 0x%p.\n", &pwc_driver);
+        return usb_register(&pwc_driver);
+}
+
+static void __exit usb_pwc_exit(void)
+{
+        PWC_DEBUG_MODULE("Deregistering driver.\n");
+        usb_deregister(&pwc_driver);
+        PWC_INFO("Philips webcam module removed.\n");
+}
+
+module_init(usb_pwc_init);
+module_exit(usb_pwc_exit);
+
+/* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */