/* * USB ViCam WebCam driver * Copyright (c) 2002 Joe Burks (jburks@wavicle.org), * John Tyner (fill in email address) * * Supports 3COM HomeConnect PC Digital 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 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/wrapper.h> #include <linux/module.h> #include <linux/init.h> #include <linux/videodev.h> #include <linux/usb.h> #include <linux/vmalloc.h> #include <linux/slab.h> #include <linux/proc_fs.h> #include "usbvideo.h" // #define VICAM_DEBUG #ifndef MODULE_LICENSE #define MODULE_LICENSE(a) #endif #ifndef bool #define bool int #endif #ifdef VICAM_DEBUG #define ADBG(lineno,fmt,args...) printk(fmt, jiffies, __FUNCTION__, 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 /* Version Information */ #define DRIVER_VERSION "v1.0" #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 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 /* Not sure what all the bytes in these char * arrays do, but they're necessary to make * the camera work. */ static unsigned char setup1[] = { 0xB6, 0xC3, 0x1F, 0x00, 0x02, 0x64, 0xE7, 0x67, 0xFD, 0xFF, 0x0E, 0xC0, 0xE7, 0x09, 0xDE, 0x00, 0x8E, 0x00, 0xC0, 0x09, 0x40, 0x03, 0xC0, 0x17, 0x44, 0x03, 0x4B, 0xAF, 0xC0, 0x07, 0x00, 0x00, 0x4B, 0xAF, 0x97, 0xCF, 0x00, 0x00 }; static unsigned char setup2[] = { 0xB6, 0xC3, 0x03, 0x00, 0x03, 0x64, 0x18, 0x00, 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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; static unsigned char setup5[] = { 0xB6, 0xC3, 0x2F, 0x01, 0x03, 0x64, 0x0E, 0x00, 0x14, 0x00, 0x1A, 0x00, 0x20, 0x00, 0x26, 0x00, 0x4A, 0x00, 0x64, 0x00, 0x6A, 0x00, 0x92, 0x00, 0x9A, 0x00, 0xA0, 0x00, 0xB2, 0x00, 0xB8, 0x00, 0xBE, 0x00, 0xC2, 0x00, 0xC8, 0x00, 0xCE, 0x00, 0xDC, 0x00, 0xDA, 0x00, 0xE2, 0x00, 0xE0, 0x00, 0xE8, 0x00, 0xE6, 0x00, 0xEE, 0x00, 0xEC, 0x00, 0xF2, 0x00, 0xF8, 0x00, 0x02, 0x01, 0x0A, 0x01, 0x0E, 0x01, 0x12, 0x01, 0x1E, 0x01, 0x22, 0x01, 0x28, 0x01, 0x2C, 0x01, 0x32, 0x01, 0x36, 0x01, 0x44, 0x01, 0x50, 0x01, 0x5E, 0x01, 0x72, 0x01, 0x76, 0x01, 0x7A, 0x01, 0x80, 0x01, 0x88, 0x01, 0x8C, 0x01, 0x94, 0x01, 0x9C, 0x01, 0xA0, 0x01, 0xA4, 0x01, 0xAA, 0x01, 0xB0, 0x01, 0xB4, 0x01, 0xBA, 0x01, 0xD0, 0x01, 0xDA, 0x01, 0xF6, 0x01, 0xFA, 0x01, 0x02, 0x02, 0x34, 0x02, 0x3C, 0x02, 0x44, 0x02, 0x4A, 0x02, 0x50, 0x02, 0x56, 0x02, 0x74, 0x02, 0x78, 0x02, 0x7E, 0x02, 0x84, 0x02, 0x8A, 0x02, 0x88, 0x02, 0x90, 0x02, 0x8E, 0x02, 0x94, 0x02, 0xA2, 0x02, 0xA8, 0x02, 0xAE, 0x02, 0xB4, 0x02, 0xBA, 0x02, 0xB8, 0x02, 0xC0, 0x02, 0xBE, 0x02, 0xC4, 0x02, 0xD0, 0x02, 0xD4, 0x02, 0xE0, 0x02, 0xE6, 0x02, 0xEE, 0x02, 0xF8, 0x02, 0xFC, 0x02, 0x06, 0x03, 0x1E, 0x03, 0x24, 0x03, 0x28, 0x03, 0x30, 0x03, 0x2E, 0x03, 0x3C, 0x03, 0x4A, 0x03, 0x4E, 0x03, 0x54, 0x03, 0x58, 0x03, 0x5E, 0x03, 0x66, 0x03, 0x6E, 0x03, 0x7A, 0x03, 0x86, 0x03, 0x8E, 0x03, 0x96, 0x03, 0xB2, 0x03, 0xB8, 0x03, 0xC6, 0x03, 0xCC, 0x03, 0xD4, 0x03, 0xDA, 0x03, 0xE8, 0x03, 0xF4, 0x03, 0xFC, 0x03, 0x04, 0x04, 0x20, 0x04, 0x2A, 0x04, 0x32, 0x04, 0x36, 0x04, 0x3E, 0x04, 0x44, 0x04, 0x42, 0x04, 0x48, 0x04, 0x4E, 0x04, 0x4C, 0x04, 0x54, 0x04, 0x52, 0x04, 0x5A, 0x04, 0x5E, 0x04, 0x62, 0x04, 0x68, 0x04, 0x74, 0x04, 0x7C, 0x04, 0x80, 0x04, 0x88, 0x04, 0x8C, 0x04, 0x94, 0x04, 0x9A, 0x04, 0xA2, 0x04, 0xA6, 0x04, 0xAE, 0x04, 0xB4, 0x04, 0xC0, 0x04, 0xCC, 0x04, 0xD8, 0x04, 0x2A, 0x05, 0x46, 0x05, 0x6C, 0x05, 0x00, 0x00 }; static unsigned long kvirt_to_pa(unsigned long adr) { unsigned long kva, ret; kva = (unsigned long) page_address(vmalloc_to_page((void *)adr)); kva |= adr & (PAGE_SIZE-1); /* restore the offset */ ret = __pa(kva); return ret; } /* 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) { mem_map_reserve(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) { mem_map_unreserve(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 struct semaphore busy_lock; // guard against SMP multithreading bool is_initialized; u8 open_count; u8 bulkEndpoint; bool needsDummyRead; #if defined(CONFIG_VIDEO_PROC_FS) struct proc_dir_entry *proc_dir; #endif }; 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 int send_control_msg(struct usb_device *udev, 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(udev, usb_sndctrlpipe(udev, 0), request, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, cp, size, HZ); status = min(status, 0); if (status < 0) { printk(KERN_INFO "Failed sending control message, error %d.\n", status); } return status; } static int initialize_camera(struct vicam_camera *cam) { const struct { u8 *data; u32 size; } firmware[] = { { .data = setup1, .size = sizeof(setup1) }, { .data = setup2, .size = sizeof(setup2) }, { .data = setup3, .size = sizeof(setup3) }, { .data = setup4, .size = sizeof(setup4) }, { .data = setup5, .size = sizeof(setup5) }, { .data = setup3, .size = sizeof(setup3) }, { .data = NULL, .size = 0 } }; struct usb_device *udev = cam->udev; int err, i; for (i = 0, err = 0; firmware[i].data && !err; i++) { memcpy(cam->cntrlbuf, firmware[i].data, firmware[i].size); err = send_control_msg(udev, 0xff, 0, 0, cam->cntrlbuf, firmware[i].size); } return err; } static int set_camera_power(struct vicam_camera *cam, int state) { int status; if ((status = send_control_msg(cam->udev, 0x50, state, 0, NULL, 0)) < 0) return status; if (state) { send_control_msg(cam->udev, 0x55, 1, 0, NULL, 0); } return 0; } static int vicam_ioctl(struct inode *inode, struct file *file, unsigned int ioctlnr, unsigned long ul_arg) { void *arg = (void *)ul_arg; struct vicam_camera *cam = file->private_data; int retval = 0; if (!cam) return -ENODEV; /* make this _really_ smp-safe */ if (down_interruptible(&cam->busy_lock)) return -EINTR; switch (ioctlnr) { /* query capabilites */ case VIDIOCGCAP: { struct video_capability b; DBG("VIDIOCGCAP\n"); 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(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, 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(arg, &v, sizeof (v))) retval = -EFAULT; break; } case VIDIOCSCHAN: { int v; if (copy_from_user(&v, 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 (arg, &vp, sizeof (struct video_picture))) retval = -EFAULT; break; } case VIDIOCSPICT: { struct video_picture *vp = (struct video_picture *) arg; 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 ((void *) 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 = (struct video_window *) arg; 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 ((void *) arg, (void *) &vm, sizeof (vm))) retval = -EFAULT; break; } case VIDIOCMCAPTURE: { struct video_mmap vm; // int video_size; if (copy_from_user ((void *) &vm, (void *) 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, arg, sizeof (int))) { retval = -EFAULT; break; } DBG("VIDIOCSYNC: %d\n", frame); read_frame(cam, frame); 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; } up(&cam->busy_lock); return retval; } static int vicam_open(struct inode *inode, struct file *file) { struct video_device *dev = video_devdata(file); struct vicam_camera *cam = (struct vicam_camera *) dev->priv; DBG("open\n"); if (!cam) { printk(KERN_ERR "vicam video_device improperly initialized"); } if ( down_interruptible(&cam->busy_lock) ) return -EINTR; if (cam->open_count > 0) { printk(KERN_INFO "vicam_open called on already opened camera"); up(&cam->busy_lock); return -EBUSY; } cam->raw_image = kmalloc(VICAM_MAX_READ_SIZE, GFP_KERNEL); if (!cam->raw_image) { up(&cam->busy_lock); return -ENOMEM; } cam->framebuf = rvmalloc(VICAM_MAX_FRAME_SIZE * VICAM_FRAMES); if (!cam->framebuf) { kfree(cam->raw_image); up(&cam->busy_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); up(&cam->busy_lock); return -ENOMEM; } // First upload firmware, then turn the camera on if (!cam->is_initialized) { initialize_camera(cam); cam->is_initialized = 1; } set_camera_power(cam, 1); cam->needsDummyRead = 1; cam->open_count++; up(&cam->busy_lock); file->private_data = cam; return 0; } static int vicam_close(struct inode *inode, struct file *file) { struct vicam_camera *cam = file->private_data; DBG("close\n"); set_camera_power(cam, 0); kfree(cam->raw_image); rvfree(cam->framebuf, VICAM_MAX_FRAME_SIZE * VICAM_FRAMES); kfree(cam->cntrlbuf); cam->open_count--; return 0; } inline int pin(int x) { return((x > 255) ? 255 : ((x < 0) ? 0 : x)); } inline void writepixel(char *rgb, int Y, int Cr, int Cb) { Y = 1160 * (Y - 16); rgb[2] = pin( ( ( Y + ( 1594 * Cr ) ) + 500 ) / 1300 ); rgb[1] = pin( ( ( Y - ( 392 * Cb ) - ( 813 * Cr ) ) + 500 ) / 1000 ); rgb[0] = pin( ( ( Y + ( 2017 * Cb ) ) + 500 ) / 900 ); } #define DATA_HEADER_SIZE 64 // -------------------------------------------------------------------------------- // vicam_decode_color - Convert from Vicam Y-Cr-Cb to RGB // // Copyright (C) 2002 Monroe Williams (monroe@pobox.com) // -------------------------------------------------------------------------------- void vicam_decode_color( char *data, char *rgb) { int x,y; int Cr, Cb; int sign; int prevX, nextX, prevY, nextY; int skip; unsigned char *src; unsigned char *dst; prevY = 512; nextY = 512; src = data + DATA_HEADER_SIZE; dst = rgb; for(y = 1; y < 241; y += 2) { // even line sign = 1; prevX = 1; nextX = 1; skip = 0; dst = rgb + (y-1)*320*3; for(x = 0; x < 512; x++) { if(x == 512-1) nextX = -1; Cr = sign * ((src[prevX] - src[0]) + (src[nextX] - src[0])) >> 1; Cb = sign * ((src[prevY] - src[prevX + prevY]) + (src[prevY] - src[nextX + prevY]) + (src[nextY] - src[prevX + nextY]) + (src[nextY] - src[nextX + nextY])) >> 2; writepixel( dst + ((x*5)>>3)*3, src[0] + (sign * (Cr >> 1)), Cr, Cb); src++; sign *= -1; prevX = -1; } prevY = -512; if(y == (242 - 2)) nextY = -512; // odd line sign = 1; prevX = 1; nextX = 1; skip = 0; dst = rgb + (y)*320*3; for(x = 0; x < 512; x++) { if(x == 512-1) nextX = -1; Cr = sign * ((src[prevX + prevY] - src[prevY]) + (src[nextX + prevY] - src[prevY]) + (src[prevX + nextY] - src[nextY]) + (src[nextX + nextY] - src[nextY])) >> 2; Cb = sign * ((src[0] - src[prevX]) + (src[0] - src[nextX])) >> 1; writepixel( dst + ((x * 5)>>3)*3, src[0] - (sign * (Cb >> 1)), Cr, Cb); src++; sign *= -1; prevX = -1; } } } 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 Bj�rndalen, 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 n = send_control_msg(cam->udev, 0x51, 0x80, 0, request, 16); if (n < 0) { printk(KERN_ERR " Problem sending frame capture control message"); return; } n = usb_bulk_msg(cam->udev, usb_rcvbulkpipe(cam->udev, cam->bulkEndpoint), cam->raw_image, 512 * 242 + 128, &actual_length, HZ*10); if (n < 0) { printk(KERN_ERR "Problem during bulk read of frame data: %d\n", n); } vicam_decode_color(cam->raw_image, cam->framebuf + framenum * VICAM_MAX_FRAME_SIZE ); } static int vicam_read( struct file *file, char *buf, size_t count, loff_t *ppos ) { struct vicam_camera *cam = file->private_data; DBG("read %d bytes.\n", (int) count); if ( down_interruptible(&cam->busy_lock) ) return -EINTR; if (*ppos >= VICAM_MAX_FRAME_SIZE) { *ppos = 0; up(&cam->busy_lock); return 0; } if (*ppos == 0) { read_frame(cam, 0); } 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; } up(&cam->busy_lock); 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; */ /* make this _really_ smp-safe */ if (down_interruptible(&cam->busy_lock)) return -EINTR; pos = (unsigned long)cam->framebuf; while (size > 0) { page = kvirt_to_pa(pos); if (remap_page_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; } up(&cam->busy_lock); return 0; } #if defined(CONFIG_VIDEO_PROC_FS) static struct proc_dir_entry *vicam_proc_root = NULL; int vicam_read_helper(char *page, char **start, off_t off, int count, int *eof, int value) { char *out = page; int len; out += sprintf(out, "%d",value); len = out - page; len -= off; if (len < count) { *eof = 1; if (len <= 0) return 0; } else len = count; *start = page + off; return len; } int vicam_read_proc_shutter(char *page, char **start, off_t off, int count, int *eof, void *data) { return vicam_read_helper(page,start,off,count,eof, ((struct vicam_camera *)data)->shutter_speed); } int vicam_read_proc_gain(char *page, char **start, off_t off, int count, int *eof, void *data) { return vicam_read_helper(page,start,off,count,eof, ((struct vicam_camera *)data)->gain); } int vicam_write_proc_shutter(struct file *file, const char *buffer, unsigned long count, void *data) { struct vicam_camera *cam = (struct vicam_camera *)data; cam->shutter_speed = simple_strtoul(buffer, NULL, 10); return count; } int vicam_write_proc_gain(struct file *file, const char *buffer, unsigned long count, void *data) { struct vicam_camera *cam = (struct vicam_camera *)data; cam->gain = simple_strtoul(buffer, NULL, 10); return count; } void vicam_create_proc_root(void) { vicam_proc_root = create_proc_entry("video/vicam", S_IFDIR, 0); if (vicam_proc_root) vicam_proc_root->owner = THIS_MODULE; else printk(KERN_ERR "could not create /proc entry for vicam!"); } void vicam_destroy_proc_root(void) { if (vicam_proc_root) remove_proc_entry("video/vicam", 0); } void vicam_create_proc_entry(struct vicam_camera *cam) { char name[64]; struct proc_dir_entry *ent; DBG(KERN_INFO "vicam: creating proc entry\n"); if (!vicam_proc_root || !cam) { printk(KERN_INFO "vicam: could not create proc entry, %s pointer is null.\n", (!cam ? "camera" : "root")); return; } sprintf(name, "video%d", cam->vdev.minor); cam->proc_dir = create_proc_entry(name, S_IFDIR, vicam_proc_root); if ( !cam->proc_dir ) return; // We should probably return an error here ent = create_proc_entry("shutter", S_IFREG | S_IRUGO | S_IWUSR, cam->proc_dir); if (ent) { ent->data = cam; ent->read_proc = vicam_read_proc_shutter; ent->write_proc = vicam_write_proc_shutter; ent->size = 64; } ent = create_proc_entry("gain", S_IFREG | S_IRUGO | S_IWUSR, cam->proc_dir); if ( ent ) { ent->data = cam; ent->read_proc = vicam_read_proc_gain; ent->write_proc = vicam_write_proc_gain; ent->size = 64; } } void vicam_destroy_proc_entry(void *ptr) { struct vicam_camera *cam = (struct vicam_camera *) ptr; char name[16]; if ( !cam->proc_dir ) return; sprintf(name, "video%d", cam->vdev.minor); remove_proc_entry("shutter", cam->proc_dir); remove_proc_entry("gain", cam->proc_dir); remove_proc_entry(name,vicam_proc_root); cam->proc_dir = NULL; } #endif static struct file_operations vicam_fops = { .owner = THIS_MODULE, .open = vicam_open, .release = vicam_close, .read = vicam_read, .mmap = vicam_mmap, .ioctl = vicam_ioctl, .llseek = no_llseek, }; static struct video_device vicam_template = { .owner = THIS_MODULE, .name = "ViCam-based USB Camera", .type = VID_TYPE_CAPTURE, .hardware = VID_HARDWARE_VICAM, .fops = &vicam_fops, .minor = -1, }; /* 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)}, {} /* 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 * * 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; /* See if the device offered us matches what we can accept */ if ((dev->descriptor.idVendor != USB_VICAM_VENDOR_ID) || (dev->descriptor.idProduct != USB_VICAM_PRODUCT_ID)) { return -ENODEV; } printk(KERN_INFO "ViCam based webcam connected\n"); interface = &intf->altsetting[0]; DBG(KERN_DEBUG "Interface %d. has %u. endpoints!\n", ifnum, (unsigned) (interface->desc.bNumEndpoints)); endpoint = &interface->endpoint[0].desc; if ((endpoint->bEndpointAddress & 0x80) && ((endpoint->bmAttributes & 3) == 0x02)) { /* 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 = kmalloc(sizeof (struct vicam_camera), GFP_KERNEL)) == NULL) { printk(KERN_WARNING "could not allocate kernel memory for vicam_camera struct\n"); return -ENOMEM; } memset(cam, 0, sizeof (struct vicam_camera)); cam->shutter_speed = 15; init_MUTEX(&cam->busy_lock); memcpy(&cam->vdev, &vicam_template, sizeof (vicam_template)); cam->vdev.priv = cam; // sort of a reverse mapping for those functions that get vdev only cam->udev = dev; cam->bulkEndpoint = bulkEndpoint; if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1) == -1) { kfree(cam); printk(KERN_WARNING "video_register_device failed\n"); return -EIO; } vicam_create_proc_entry(cam); printk(KERN_INFO "ViCam webcam driver now controlling video device %d\n",cam->vdev.minor); dev_set_drvdata(&intf->dev, cam); return 0; } static void vicam_disconnect(struct usb_interface *intf) { struct vicam_camera *cam = dev_get_drvdata(&intf->dev); dev_set_drvdata ( &intf->dev, NULL ); cam->udev = NULL; video_unregister_device(&cam->vdev); #if defined(CONFIG_VIDEO_PROC_FS) vicam_destroy_proc_entry(cam); #endif kfree(cam); printk(KERN_DEBUG "ViCam-based WebCam disconnected\n"); } /* */ static int __init usb_vicam_init(void) { DBG(KERN_INFO "ViCam-based WebCam driver startup\n"); #if defined(CONFIG_VIDEO_PROC_FS) vicam_create_proc_root(); #endif if (usb_register(&vicam_driver) != 0) printk(KERN_WARNING "usb_register failed!\n"); return 0; } static void __exit usb_vicam_exit(void) { DBG(KERN_INFO "ViCam-based WebCam driver shutdown\n"); usb_deregister(&vicam_driver); #if defined(CONFIG_VIDEO_PROC_FS) vicam_destroy_proc_root(); #endif } module_init(usb_vicam_init); module_exit(usb_vicam_exit); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL");