diff options
Diffstat (limited to 'drivers/staging/usbvideo/vicam.c')
-rw-r--r-- | drivers/staging/usbvideo/vicam.c | 946 |
1 files changed, 0 insertions, 946 deletions
diff --git a/drivers/staging/usbvideo/vicam.c b/drivers/staging/usbvideo/vicam.c deleted file mode 100644 index 38a373a8d077..000000000000 --- a/drivers/staging/usbvideo/vicam.c +++ /dev/null @@ -1,946 +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 "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; - - status = send_control_msg(cam, 0x50, state, 0, NULL, 0); - if (status < 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"); - } - - cam = kzalloc(sizeof(struct vicam_camera), GFP_KERNEL); - if (cam == 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"); |