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path: root/drivers/media/video/usbvideo/vicam.c
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Diffstat (limited to 'drivers/media/video/usbvideo/vicam.c')
-rw-r--r--drivers/media/video/usbvideo/vicam.c952
1 files changed, 0 insertions, 952 deletions
diff --git a/drivers/media/video/usbvideo/vicam.c b/drivers/media/video/usbvideo/vicam.c
deleted file mode 100644
index dc17cce2fbb6..000000000000
--- a/drivers/media/video/usbvideo/vicam.c
+++ /dev/null
@@ -1,952 +0,0 @@
-/*
- * 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 <linux/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 2.0.4) at 2024-04-19 03:59:03 +0000