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Diffstat (limited to 'drivers/staging/usbvideo/vicam.c')
-rw-r--r--drivers/staging/usbvideo/vicam.c952
1 files changed, 952 insertions, 0 deletions
diff --git a/drivers/staging/usbvideo/vicam.c b/drivers/staging/usbvideo/vicam.c
new file mode 100644
index 00000000000..ecdb121297c
--- /dev/null
+++ b/drivers/staging/usbvideo/vicam.c
@@ -0,0 +1,952 @@
+/*
+ * USB ViCam WebCam driver
+ * Copyright (c) 2002 Joe Burks (jburks@wavicle.org),
+ * Christopher L Cheney (ccheney@cheney.cx),
+ * Pavel Machek (pavel@ucw.cz),
+ * John Tyner (jtyner@cs.ucr.edu),
+ * Monroe Williams (monroe@pobox.com)
+ *
+ * Supports 3COM HomeConnect PC Digital WebCam
+ * Supports Compro PS39U WebCam
+ *
+ * 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.
+ *
+ * This source code is based heavily on the CPiA webcam driver which was
+ * written by Peter Pregler, Scott J. Bertin and Johannes Erdfelt
+ *
+ * Portions of this code were also copied from usbvideo.c
+ *
+ * Special thanks to the whole team at Sourceforge for help making
+ * this driver become a reality. Notably:
+ * Andy Armstrong who reverse engineered the color encoding and
+ * Pavel Machek and Chris Cheney who worked on reverse engineering the
+ * camera controls and wrote the first generation driver.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include "videodev.h"
+#include <linux/usb.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/firmware.h>
+#include <linux/ihex.h>
+#include "usbvideo.h"
+
+// #define VICAM_DEBUG
+
+#ifdef VICAM_DEBUG
+#define ADBG(lineno,fmt,args...) printk(fmt, jiffies, __func__, lineno, ##args)
+#define DBG(fmt,args...) ADBG((__LINE__),KERN_DEBUG __FILE__"(%ld):%s (%d):"fmt,##args)
+#else
+#define DBG(fmn,args...) do {} while(0)
+#endif
+
+#define DRIVER_AUTHOR "Joe Burks, jburks@wavicle.org"
+#define DRIVER_DESC "ViCam WebCam Driver"
+
+/* Define these values to match your device */
+#define USB_VICAM_VENDOR_ID 0x04c1
+#define USB_VICAM_PRODUCT_ID 0x009d
+#define USB_COMPRO_VENDOR_ID 0x0602
+#define USB_COMPRO_PRODUCT_ID 0x1001
+
+#define VICAM_BYTES_PER_PIXEL 3
+#define VICAM_MAX_READ_SIZE (512*242+128)
+#define VICAM_MAX_FRAME_SIZE (VICAM_BYTES_PER_PIXEL*320*240)
+#define VICAM_FRAMES 2
+
+#define VICAM_HEADER_SIZE 64
+
+/* rvmalloc / rvfree copied from usbvideo.c
+ *
+ * Not sure why these are not yet non-statics which I can reference through
+ * usbvideo.h the same as it is in 2.4.20. I bet this will get fixed sometime
+ * in the future.
+ *
+*/
+static void *rvmalloc(unsigned long size)
+{
+ void *mem;
+ unsigned long adr;
+
+ size = PAGE_ALIGN(size);
+ mem = vmalloc_32(size);
+ if (!mem)
+ return NULL;
+
+ memset(mem, 0, size); /* Clear the ram out, no junk to the user */
+ adr = (unsigned long) mem;
+ while (size > 0) {
+ SetPageReserved(vmalloc_to_page((void *)adr));
+ adr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+
+ return mem;
+}
+
+static void rvfree(void *mem, unsigned long size)
+{
+ unsigned long adr;
+
+ if (!mem)
+ return;
+
+ adr = (unsigned long) mem;
+ while ((long) size > 0) {
+ ClearPageReserved(vmalloc_to_page((void *)adr));
+ adr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+ vfree(mem);
+}
+
+struct vicam_camera {
+ u16 shutter_speed; // capture shutter speed
+ u16 gain; // capture gain
+
+ u8 *raw_image; // raw data captured from the camera
+ u8 *framebuf; // processed data in RGB24 format
+ u8 *cntrlbuf; // area used to send control msgs
+
+ struct video_device vdev; // v4l video device
+ struct usb_device *udev; // usb device
+
+ /* guard against simultaneous accesses to the camera */
+ struct mutex cam_lock;
+
+ int is_initialized;
+ u8 open_count;
+ u8 bulkEndpoint;
+ int needsDummyRead;
+};
+
+static int vicam_probe( struct usb_interface *intf, const struct usb_device_id *id);
+static void vicam_disconnect(struct usb_interface *intf);
+static void read_frame(struct vicam_camera *cam, int framenum);
+static void vicam_decode_color(const u8 *, u8 *);
+
+static int __send_control_msg(struct vicam_camera *cam,
+ u8 request,
+ u16 value,
+ u16 index,
+ unsigned char *cp,
+ u16 size)
+{
+ int status;
+
+ /* cp must be memory that has been allocated by kmalloc */
+
+ status = usb_control_msg(cam->udev,
+ usb_sndctrlpipe(cam->udev, 0),
+ request,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, value, index,
+ cp, size, 1000);
+
+ status = min(status, 0);
+
+ if (status < 0) {
+ printk(KERN_INFO "Failed sending control message, error %d.\n",
+ status);
+ }
+
+ return status;
+}
+
+static int send_control_msg(struct vicam_camera *cam,
+ u8 request,
+ u16 value,
+ u16 index,
+ unsigned char *cp,
+ u16 size)
+{
+ int status = -ENODEV;
+ mutex_lock(&cam->cam_lock);
+ if (cam->udev) {
+ status = __send_control_msg(cam, request, value,
+ index, cp, size);
+ }
+ mutex_unlock(&cam->cam_lock);
+ return status;
+}
+static int
+initialize_camera(struct vicam_camera *cam)
+{
+ int err;
+ const struct ihex_binrec *rec;
+ const struct firmware *uninitialized_var(fw);
+
+ err = request_ihex_firmware(&fw, "vicam/firmware.fw", &cam->udev->dev);
+ if (err) {
+ printk(KERN_ERR "Failed to load \"vicam/firmware.fw\": %d\n",
+ err);
+ return err;
+ }
+
+ for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) {
+ memcpy(cam->cntrlbuf, rec->data, be16_to_cpu(rec->len));
+
+ err = send_control_msg(cam, 0xff, 0, 0,
+ cam->cntrlbuf, be16_to_cpu(rec->len));
+ if (err)
+ break;
+ }
+
+ release_firmware(fw);
+
+ return err;
+}
+
+static int
+set_camera_power(struct vicam_camera *cam, int state)
+{
+ int status;
+
+ if ((status = send_control_msg(cam, 0x50, state, 0, NULL, 0)) < 0)
+ return status;
+
+ if (state) {
+ send_control_msg(cam, 0x55, 1, 0, NULL, 0);
+ }
+
+ return 0;
+}
+
+static long
+vicam_ioctl(struct file *file, unsigned int ioctlnr, unsigned long arg)
+{
+ void __user *user_arg = (void __user *)arg;
+ struct vicam_camera *cam = file->private_data;
+ long retval = 0;
+
+ if (!cam)
+ return -ENODEV;
+
+ switch (ioctlnr) {
+ /* query capabilities */
+ case VIDIOCGCAP:
+ {
+ struct video_capability b;
+
+ DBG("VIDIOCGCAP\n");
+ memset(&b, 0, sizeof(b));
+ strcpy(b.name, "ViCam-based Camera");
+ b.type = VID_TYPE_CAPTURE;
+ b.channels = 1;
+ b.audios = 0;
+ b.maxwidth = 320; /* VIDEOSIZE_CIF */
+ b.maxheight = 240;
+ b.minwidth = 320; /* VIDEOSIZE_48_48 */
+ b.minheight = 240;
+
+ if (copy_to_user(user_arg, &b, sizeof(b)))
+ retval = -EFAULT;
+
+ break;
+ }
+ /* get/set video source - we are a camera and nothing else */
+ case VIDIOCGCHAN:
+ {
+ struct video_channel v;
+
+ DBG("VIDIOCGCHAN\n");
+ if (copy_from_user(&v, user_arg, sizeof(v))) {
+ retval = -EFAULT;
+ break;
+ }
+ if (v.channel != 0) {
+ retval = -EINVAL;
+ break;
+ }
+
+ v.channel = 0;
+ strcpy(v.name, "Camera");
+ v.tuners = 0;
+ v.flags = 0;
+ v.type = VIDEO_TYPE_CAMERA;
+ v.norm = 0;
+
+ if (copy_to_user(user_arg, &v, sizeof(v)))
+ retval = -EFAULT;
+ break;
+ }
+
+ case VIDIOCSCHAN:
+ {
+ int v;
+
+ if (copy_from_user(&v, user_arg, sizeof(v)))
+ retval = -EFAULT;
+ DBG("VIDIOCSCHAN %d\n", v);
+
+ if (retval == 0 && v != 0)
+ retval = -EINVAL;
+
+ break;
+ }
+
+ /* image properties */
+ case VIDIOCGPICT:
+ {
+ struct video_picture vp;
+ DBG("VIDIOCGPICT\n");
+ memset(&vp, 0, sizeof (struct video_picture));
+ vp.brightness = cam->gain << 8;
+ vp.depth = 24;
+ vp.palette = VIDEO_PALETTE_RGB24;
+ if (copy_to_user(user_arg, &vp, sizeof (struct video_picture)))
+ retval = -EFAULT;
+ break;
+ }
+
+ case VIDIOCSPICT:
+ {
+ struct video_picture vp;
+
+ if (copy_from_user(&vp, user_arg, sizeof(vp))) {
+ retval = -EFAULT;
+ break;
+ }
+
+ DBG("VIDIOCSPICT depth = %d, pal = %d\n", vp.depth,
+ vp.palette);
+
+ cam->gain = vp.brightness >> 8;
+
+ if (vp.depth != 24
+ || vp.palette != VIDEO_PALETTE_RGB24)
+ retval = -EINVAL;
+
+ break;
+ }
+
+ /* get/set capture window */
+ case VIDIOCGWIN:
+ {
+ struct video_window vw;
+ vw.x = 0;
+ vw.y = 0;
+ vw.width = 320;
+ vw.height = 240;
+ vw.chromakey = 0;
+ vw.flags = 0;
+ vw.clips = NULL;
+ vw.clipcount = 0;
+
+ DBG("VIDIOCGWIN\n");
+
+ if (copy_to_user(user_arg, (void *)&vw, sizeof(vw)))
+ retval = -EFAULT;
+
+ // I'm not sure what the deal with a capture window is, it is very poorly described
+ // in the doc. So I won't support it now.
+ break;
+ }
+
+ case VIDIOCSWIN:
+ {
+
+ struct video_window vw;
+
+ if (copy_from_user(&vw, user_arg, sizeof(vw))) {
+ retval = -EFAULT;
+ break;
+ }
+
+ DBG("VIDIOCSWIN %d x %d\n", vw.width, vw.height);
+
+ if ( vw.width != 320 || vw.height != 240 )
+ retval = -EFAULT;
+
+ break;
+ }
+
+ /* mmap interface */
+ case VIDIOCGMBUF:
+ {
+ struct video_mbuf vm;
+ int i;
+
+ DBG("VIDIOCGMBUF\n");
+ memset(&vm, 0, sizeof (vm));
+ vm.size =
+ VICAM_MAX_FRAME_SIZE * VICAM_FRAMES;
+ vm.frames = VICAM_FRAMES;
+ for (i = 0; i < VICAM_FRAMES; i++)
+ vm.offsets[i] = VICAM_MAX_FRAME_SIZE * i;
+
+ if (copy_to_user(user_arg, (void *)&vm, sizeof(vm)))
+ retval = -EFAULT;
+
+ break;
+ }
+
+ case VIDIOCMCAPTURE:
+ {
+ struct video_mmap vm;
+ // int video_size;
+
+ if (copy_from_user((void *)&vm, user_arg, sizeof(vm))) {
+ retval = -EFAULT;
+ break;
+ }
+
+ DBG("VIDIOCMCAPTURE frame=%d, height=%d, width=%d, format=%d.\n",vm.frame,vm.width,vm.height,vm.format);
+
+ if ( vm.frame >= VICAM_FRAMES || vm.format != VIDEO_PALETTE_RGB24 )
+ retval = -EINVAL;
+
+ // in theory right here we'd start the image capturing
+ // (fill in a bulk urb and submit it asynchronously)
+ //
+ // Instead we're going to do a total hack job for now and
+ // retrieve the frame in VIDIOCSYNC
+
+ break;
+ }
+
+ case VIDIOCSYNC:
+ {
+ int frame;
+
+ if (copy_from_user((void *)&frame, user_arg, sizeof(int))) {
+ retval = -EFAULT;
+ break;
+ }
+ DBG("VIDIOCSYNC: %d\n", frame);
+
+ read_frame(cam, frame);
+ vicam_decode_color(cam->raw_image,
+ cam->framebuf +
+ frame * VICAM_MAX_FRAME_SIZE );
+
+ break;
+ }
+
+ /* pointless to implement overlay with this camera */
+ case VIDIOCCAPTURE:
+ case VIDIOCGFBUF:
+ case VIDIOCSFBUF:
+ case VIDIOCKEY:
+ retval = -EINVAL;
+ break;
+
+ /* tuner interface - we have none */
+ case VIDIOCGTUNER:
+ case VIDIOCSTUNER:
+ case VIDIOCGFREQ:
+ case VIDIOCSFREQ:
+ retval = -EINVAL;
+ break;
+
+ /* audio interface - we have none */
+ case VIDIOCGAUDIO:
+ case VIDIOCSAUDIO:
+ retval = -EINVAL;
+ break;
+ default:
+ retval = -ENOIOCTLCMD;
+ break;
+ }
+
+ return retval;
+}
+
+static int
+vicam_open(struct file *file)
+{
+ struct vicam_camera *cam = video_drvdata(file);
+
+ DBG("open\n");
+
+ if (!cam) {
+ printk(KERN_ERR
+ "vicam video_device improperly initialized");
+ return -EINVAL;
+ }
+
+ /* cam_lock/open_count protects us from simultaneous opens
+ * ... for now. we probably shouldn't rely on this fact forever.
+ */
+
+ mutex_lock(&cam->cam_lock);
+ if (cam->open_count > 0) {
+ printk(KERN_INFO
+ "vicam_open called on already opened camera");
+ mutex_unlock(&cam->cam_lock);
+ return -EBUSY;
+ }
+
+ cam->raw_image = kmalloc(VICAM_MAX_READ_SIZE, GFP_KERNEL);
+ if (!cam->raw_image) {
+ mutex_unlock(&cam->cam_lock);
+ return -ENOMEM;
+ }
+
+ cam->framebuf = rvmalloc(VICAM_MAX_FRAME_SIZE * VICAM_FRAMES);
+ if (!cam->framebuf) {
+ kfree(cam->raw_image);
+ mutex_unlock(&cam->cam_lock);
+ return -ENOMEM;
+ }
+
+ cam->cntrlbuf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!cam->cntrlbuf) {
+ kfree(cam->raw_image);
+ rvfree(cam->framebuf, VICAM_MAX_FRAME_SIZE * VICAM_FRAMES);
+ mutex_unlock(&cam->cam_lock);
+ return -ENOMEM;
+ }
+
+ cam->needsDummyRead = 1;
+ cam->open_count++;
+
+ file->private_data = cam;
+ mutex_unlock(&cam->cam_lock);
+
+
+ // First upload firmware, then turn the camera on
+
+ if (!cam->is_initialized) {
+ initialize_camera(cam);
+
+ cam->is_initialized = 1;
+ }
+
+ set_camera_power(cam, 1);
+
+ return 0;
+}
+
+static int
+vicam_close(struct file *file)
+{
+ struct vicam_camera *cam = file->private_data;
+ int open_count;
+ struct usb_device *udev;
+
+ DBG("close\n");
+
+ /* it's not the end of the world if
+ * we fail to turn the camera off.
+ */
+
+ set_camera_power(cam, 0);
+
+ kfree(cam->raw_image);
+ rvfree(cam->framebuf, VICAM_MAX_FRAME_SIZE * VICAM_FRAMES);
+ kfree(cam->cntrlbuf);
+
+ mutex_lock(&cam->cam_lock);
+
+ cam->open_count--;
+ open_count = cam->open_count;
+ udev = cam->udev;
+
+ mutex_unlock(&cam->cam_lock);
+
+ if (!open_count && !udev) {
+ kfree(cam);
+ }
+
+ return 0;
+}
+
+static void vicam_decode_color(const u8 *data, u8 *rgb)
+{
+ /* vicam_decode_color - Convert from Vicam Y-Cr-Cb to RGB
+ * Copyright (C) 2002 Monroe Williams (monroe@pobox.com)
+ */
+
+ int i, prevY, nextY;
+
+ prevY = 512;
+ nextY = 512;
+
+ data += VICAM_HEADER_SIZE;
+
+ for( i = 0; i < 240; i++, data += 512 ) {
+ const int y = ( i * 242 ) / 240;
+
+ int j, prevX, nextX;
+ int Y, Cr, Cb;
+
+ if ( y == 242 - 1 ) {
+ nextY = -512;
+ }
+
+ prevX = 1;
+ nextX = 1;
+
+ for ( j = 0; j < 320; j++, rgb += 3 ) {
+ const int x = ( j * 512 ) / 320;
+ const u8 * const src = &data[x];
+
+ if ( x == 512 - 1 ) {
+ nextX = -1;
+ }
+
+ Cr = ( src[prevX] - src[0] ) +
+ ( src[nextX] - src[0] );
+ Cr /= 2;
+
+ Cb = ( src[prevY] - src[prevX + prevY] ) +
+ ( src[prevY] - src[nextX + prevY] ) +
+ ( src[nextY] - src[prevX + nextY] ) +
+ ( src[nextY] - src[nextX + nextY] );
+ Cb /= 4;
+
+ Y = 1160 * ( src[0] + ( Cr / 2 ) - 16 );
+
+ if ( i & 1 ) {
+ int Ct = Cr;
+ Cr = Cb;
+ Cb = Ct;
+ }
+
+ if ( ( x ^ i ) & 1 ) {
+ Cr = -Cr;
+ Cb = -Cb;
+ }
+
+ rgb[0] = clamp( ( ( Y + ( 2017 * Cb ) ) +
+ 500 ) / 900, 0, 255 );
+ rgb[1] = clamp( ( ( Y - ( 392 * Cb ) -
+ ( 813 * Cr ) ) +
+ 500 ) / 1000, 0, 255 );
+ rgb[2] = clamp( ( ( Y + ( 1594 * Cr ) ) +
+ 500 ) / 1300, 0, 255 );
+
+ prevX = -1;
+ }
+
+ prevY = -512;
+ }
+}
+
+static void
+read_frame(struct vicam_camera *cam, int framenum)
+{
+ unsigned char *request = cam->cntrlbuf;
+ int realShutter;
+ int n;
+ int actual_length;
+
+ if (cam->needsDummyRead) {
+ cam->needsDummyRead = 0;
+ read_frame(cam, framenum);
+ }
+
+ memset(request, 0, 16);
+ request[0] = cam->gain; // 0 = 0% gain, FF = 100% gain
+
+ request[1] = 0; // 512x242 capture
+
+ request[2] = 0x90; // the function of these two bytes
+ request[3] = 0x07; // is not yet understood
+
+ if (cam->shutter_speed > 60) {
+ // Short exposure
+ realShutter =
+ ((-15631900 / cam->shutter_speed) + 260533) / 1000;
+ request[4] = realShutter & 0xFF;
+ request[5] = (realShutter >> 8) & 0xFF;
+ request[6] = 0x03;
+ request[7] = 0x01;
+ } else {
+ // Long exposure
+ realShutter = 15600 / cam->shutter_speed - 1;
+ request[4] = 0;
+ request[5] = 0;
+ request[6] = realShutter & 0xFF;
+ request[7] = realShutter >> 8;
+ }
+
+ // Per John Markus Bjørndalen, byte at index 8 causes problems if it isn't 0
+ request[8] = 0;
+ // bytes 9-15 do not seem to affect exposure or image quality
+
+ mutex_lock(&cam->cam_lock);
+
+ if (!cam->udev) {
+ goto done;
+ }
+
+ n = __send_control_msg(cam, 0x51, 0x80, 0, request, 16);
+
+ if (n < 0) {
+ printk(KERN_ERR
+ " Problem sending frame capture control message");
+ goto done;
+ }
+
+ n = usb_bulk_msg(cam->udev,
+ usb_rcvbulkpipe(cam->udev, cam->bulkEndpoint),
+ cam->raw_image,
+ 512 * 242 + 128, &actual_length, 10000);
+
+ if (n < 0) {
+ printk(KERN_ERR "Problem during bulk read of frame data: %d\n",
+ n);
+ }
+
+ done:
+ mutex_unlock(&cam->cam_lock);
+}
+
+static ssize_t
+vicam_read( struct file *file, char __user *buf, size_t count, loff_t *ppos )
+{
+ struct vicam_camera *cam = file->private_data;
+
+ DBG("read %d bytes.\n", (int) count);
+
+ if (*ppos >= VICAM_MAX_FRAME_SIZE) {
+ *ppos = 0;
+ return 0;
+ }
+
+ if (*ppos == 0) {
+ read_frame(cam, 0);
+ vicam_decode_color(cam->raw_image,
+ cam->framebuf +
+ 0 * VICAM_MAX_FRAME_SIZE);
+ }
+
+ count = min_t(size_t, count, VICAM_MAX_FRAME_SIZE - *ppos);
+
+ if (copy_to_user(buf, &cam->framebuf[*ppos], count)) {
+ count = -EFAULT;
+ } else {
+ *ppos += count;
+ }
+
+ if (count == VICAM_MAX_FRAME_SIZE) {
+ *ppos = 0;
+ }
+
+ return count;
+}
+
+
+static int
+vicam_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ // TODO: allocate the raw frame buffer if necessary
+ unsigned long page, pos;
+ unsigned long start = vma->vm_start;
+ unsigned long size = vma->vm_end-vma->vm_start;
+ struct vicam_camera *cam = file->private_data;
+
+ if (!cam)
+ return -ENODEV;
+
+ DBG("vicam_mmap: %ld\n", size);
+
+ /* We let mmap allocate as much as it wants because Linux was adding 2048 bytes
+ * to the size the application requested for mmap and it was screwing apps up.
+ if (size > VICAM_FRAMES*VICAM_MAX_FRAME_SIZE)
+ return -EINVAL;
+ */
+
+ pos = (unsigned long)cam->framebuf;
+ while (size > 0) {
+ page = vmalloc_to_pfn((void *)pos);
+ if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
+ return -EAGAIN;
+
+ start += PAGE_SIZE;
+ pos += PAGE_SIZE;
+ if (size > PAGE_SIZE)
+ size -= PAGE_SIZE;
+ else
+ size = 0;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_file_operations vicam_fops = {
+ .owner = THIS_MODULE,
+ .open = vicam_open,
+ .release = vicam_close,
+ .read = vicam_read,
+ .mmap = vicam_mmap,
+ .ioctl = vicam_ioctl,
+};
+
+static struct video_device vicam_template = {
+ .name = "ViCam-based USB Camera",
+ .fops = &vicam_fops,
+ .release = video_device_release_empty,
+};
+
+/* table of devices that work with this driver */
+static struct usb_device_id vicam_table[] = {
+ {USB_DEVICE(USB_VICAM_VENDOR_ID, USB_VICAM_PRODUCT_ID)},
+ {USB_DEVICE(USB_COMPRO_VENDOR_ID, USB_COMPRO_PRODUCT_ID)},
+ {} /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, vicam_table);
+
+static struct usb_driver vicam_driver = {
+ .name = "vicam",
+ .probe = vicam_probe,
+ .disconnect = vicam_disconnect,
+ .id_table = vicam_table
+};
+
+/**
+ * vicam_probe
+ * @intf: the interface
+ * @id: the device id
+ *
+ * Called by the usb core when a new device is connected that it thinks
+ * this driver might be interested in.
+ */
+static int
+vicam_probe( struct usb_interface *intf, const struct usb_device_id *id)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+ int bulkEndpoint = 0;
+ const struct usb_host_interface *interface;
+ const struct usb_endpoint_descriptor *endpoint;
+ struct vicam_camera *cam;
+
+ printk(KERN_INFO "ViCam based webcam connected\n");
+
+ interface = intf->cur_altsetting;
+
+ DBG(KERN_DEBUG "Interface %d. has %u. endpoints!\n",
+ interface->desc.bInterfaceNumber, (unsigned) (interface->desc.bNumEndpoints));
+ endpoint = &interface->endpoint[0].desc;
+
+ if (usb_endpoint_is_bulk_in(endpoint)) {
+ /* we found a bulk in endpoint */
+ bulkEndpoint = endpoint->bEndpointAddress;
+ } else {
+ printk(KERN_ERR
+ "No bulk in endpoint was found ?! (this is bad)\n");
+ }
+
+ if ((cam =
+ kzalloc(sizeof (struct vicam_camera), GFP_KERNEL)) == NULL) {
+ printk(KERN_WARNING
+ "could not allocate kernel memory for vicam_camera struct\n");
+ return -ENOMEM;
+ }
+
+
+ cam->shutter_speed = 15;
+
+ mutex_init(&cam->cam_lock);
+
+ memcpy(&cam->vdev, &vicam_template, sizeof(vicam_template));
+ video_set_drvdata(&cam->vdev, cam);
+
+ cam->udev = dev;
+ cam->bulkEndpoint = bulkEndpoint;
+
+ if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1) < 0) {
+ kfree(cam);
+ printk(KERN_WARNING "video_register_device failed\n");
+ return -EIO;
+ }
+
+ printk(KERN_INFO "ViCam webcam driver now controlling device %s\n",
+ video_device_node_name(&cam->vdev));
+
+ usb_set_intfdata (intf, cam);
+
+ return 0;
+}
+
+static void
+vicam_disconnect(struct usb_interface *intf)
+{
+ int open_count;
+ struct vicam_camera *cam = usb_get_intfdata (intf);
+ usb_set_intfdata (intf, NULL);
+
+ /* we must unregister the device before taking its
+ * cam_lock. This is because the video open call
+ * holds the same lock as video unregister. if we
+ * unregister inside of the cam_lock and open also
+ * uses the cam_lock, we get deadlock.
+ */
+
+ video_unregister_device(&cam->vdev);
+
+ /* stop the camera from being used */
+
+ mutex_lock(&cam->cam_lock);
+
+ /* mark the camera as gone */
+
+ cam->udev = NULL;
+
+ /* the only thing left to do is synchronize with
+ * our close/release function on who should release
+ * the camera memory. if there are any users using the
+ * camera, it's their job. if there are no users,
+ * it's ours.
+ */
+
+ open_count = cam->open_count;
+
+ mutex_unlock(&cam->cam_lock);
+
+ if (!open_count) {
+ kfree(cam);
+ }
+
+ printk(KERN_DEBUG "ViCam-based WebCam disconnected\n");
+}
+
+/*
+ */
+static int __init
+usb_vicam_init(void)
+{
+ int retval;
+ DBG(KERN_INFO "ViCam-based WebCam driver startup\n");
+ retval = usb_register(&vicam_driver);
+ if (retval)
+ printk(KERN_WARNING "usb_register failed!\n");
+ return retval;
+}
+
+static void __exit
+usb_vicam_exit(void)
+{
+ DBG(KERN_INFO
+ "ViCam-based WebCam driver shutdown\n");
+
+ usb_deregister(&vicam_driver);
+}
+
+module_init(usb_vicam_init);
+module_exit(usb_vicam_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("vicam/firmware.fw");
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-28 07:46:21 +0000