/*
* USB ViCam WebCam driver
* Copyright (c) 2002 Joe Burks (jburks@wavicle.org),
* Christopher L Cheney (ccheney@cheney.cx),
* Pavel Machek (pavel@suse.cz),
* John Tyner (jtyner@cs.ucr.edu),
* Monroe Williams (monroe@pobox.com)
*
* 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,
0x00, 0x00
};
static unsigned char setup3[] = {
0xB6, 0xC3, 0x01, 0x00, 0x06, 0x64, 0x00, 0x00
};
static unsigned char setup4[] = {
0xB6, 0xC3, 0x8F, 0x06, 0x02, 0x64, 0xE7, 0x07,
0x00, 0x00, 0x08, 0xC0, 0xE7, 0x07, 0x00, 0x00,
0x3E, 0xC0, 0xE7, 0x07, 0x54, 0x01, 0xAA, 0x00,
0xE7, 0x07, 0xC8, 0x05, 0xB6, 0x00, 0xE7, 0x07,
0x42, 0x01, 0xD2, 0x00, 0xE7, 0x07, 0x7C, 0x00,
0x16, 0x00, 0xE7, 0x07, 0x56, 0x00, 0x18, 0x00,
0xE7, 0x07, 0x06, 0x00, 0x92, 0xC0, 0xE7, 0x07,
0x00, 0x00, 0x1E, 0xC0, 0xE7, 0x07, 0xFF, 0xFF,
0x22, 0xC0, 0xE7, 0x07, 0x04, 0x00, 0x24, 0xC0,
0xE7, 0x07, 0xEC, 0x27, 0x28, 0xC0, 0xE7, 0x07,
0x16, 0x01, 0x8E, 0x00, 0xE7, 0x87, 0x01, 0x00,
0x0E, 0xC0, 0x97, 0xCF, 0xD7, 0x09, 0x00, 0xC0,
0xE7, 0x77, 0x01, 0x00, 0x92, 0xC0, 0x09, 0xC1,
0xE7, 0x09, 0xFE, 0x05, 0x24, 0x01, 0xE7, 0x09,
0x04, 0x06, 0x26, 0x01, 0xE7, 0x07, 0x07, 0x00,
0x92, 0xC0, 0xE7, 0x05, 0x00, 0xC0, 0xC0, 0xDF,
0x97, 0xCF, 0x17, 0x00, 0x57, 0x00, 0x17, 0x02,
0xD7, 0x09, 0x00, 0xC0, 0xE7, 0x77, 0x01, 0x00,
0x92, 0xC0, 0x0A, 0xC1, 0xE7, 0x57, 0xFF, 0xFF,
0xFA, 0x05, 0x0D, 0xC0, 0xE7, 0x57, 0x00, 0x00,
0xFA, 0x05, 0x0F, 0xC0, 0x9F, 0xAF, 0xC6, 0x00,
0xE7, 0x05, 0x00, 0xC0, 0xC8, 0x05, 0xC1, 0x05,
0xC0, 0x05, 0xC0, 0xDF, 0x97, 0xCF, 0x27, 0xDA,
0xFA, 0x05, 0xEF, 0x07, 0x01, 0x00, 0x0B, 0x06,
0x73, 0xCF, 0x9F, 0xAF, 0x78, 0x01, 0x9F, 0xAF,
0x1A, 0x03, 0x6E, 0xCF, 0xE7, 0x09, 0xFC, 0x05,
0x24, 0x01, 0xE7, 0x09, 0x02, 0x06, 0x26, 0x01,
0xE7, 0x07, 0x07, 0x00, 0x92, 0xC0, 0xE7, 0x09,
0xFC, 0x05, 0xFE, 0x05, 0xE7, 0x09, 0x02, 0x06,
0x04, 0x06, 0xE7, 0x09, 0x00, 0x06, 0xFC, 0x05,
0xE7, 0x09, 0xFE, 0x05, 0x00, 0x06, 0x27, 0xDA,
0xFA, 0x05, 0xE7, 0x57, 0x01, 0x00, 0xFA, 0x05,
0x02, 0xCA, 0x04, 0xC0, 0x97, 0xCF, 0x9F, 0xAF,
0x66, 0x05, 0x97, 0xCF, 0xE7, 0x07, 0x40, 0x00,
0x02, 0x06, 0xC8, 0x09, 0xFC, 0x05, 0x9F, 0xAF,
0xDA, 0x02, 0x97, 0xCF, 0xCF, 0x17, 0x02, 0x00,
0xEF, 0x57, 0x81, 0x00, 0x09, 0x06, 0x9F, 0xA0,
0xB6, 0x01, 0xEF, 0x57, 0x80, 0x00, 0x09, 0x06,
0x9F, 0xA0, 0x40, 0x02, 0xEF, 0x57, 0x01, 0x00,
0x0B, 0x06, 0x9F, 0xA0, 0x46, 0x03, 0xE7, 0x07,
0x01, 0x00, 0x0A, 0xC0, 0x46, 0xAF, 0x47, 0xAF,
0x9F, 0xAF, 0x40, 0x02, 0xE7, 0x07, 0x2E, 0x00,
0x0A, 0xC0, 0xEF, 0x87, 0x80, 0x00, 0x09, 0x06,
0x97, 0xCF, 0x00, 0x0E, 0x01, 0x00, 0xC0, 0x57,
0x51, 0x00, 0x9F, 0xC0, 0x9E, 0x02, 0xC0, 0x57,
0x50, 0x00, 0x20, 0xC0, 0xC0, 0x57, 0x55, 0x00,
0x12, 0xC0, 0xC0, 0x57, 0x56, 0x00, 0x9F, 0xC0,
0x72, 0x02, 0x9F, 0xCF, 0xD6, 0x02, 0xC1, 0x0B,
0x08, 0x06, 0x01, 0xD0, 0x6F, 0x90, 0x08, 0x06,
0xC0, 0x07, 0x08, 0x00, 0xC1, 0x0B, 0x08, 0x06,
0x9F, 0xAF, 0x28, 0x05, 0x97, 0xCF, 0x2F, 0x0E,
0x02, 0x00, 0x08, 0x06, 0xC0, 0x07, 0x08, 0x00,
0xC1, 0x0B, 0x08, 0x06, 0x9F, 0xAF, 0x28, 0x05,
0x9F, 0xCF, 0xD6, 0x02, 0x2F, 0x0E, 0x02, 0x00,
0x09, 0x06, 0xEF, 0x87, 0x80, 0x00, 0x09, 0x06,
0x9F, 0xCF, 0xD6, 0x02, 0xEF, 0x67, 0x7F, 0xFF,
0x09, 0x06, 0xE7, 0x67, 0xFF, 0xFD, 0x22, 0xC0,
0xE7, 0x67, 0xEF, 0xFF, 0x24, 0xC0, 0xE7, 0x87,
0x10, 0x00, 0x28, 0xC0, 0x9F, 0xAF, 0xB8, 0x05,
0xE7, 0x87, 0xE0, 0x21, 0x24, 0xC0, 0x9F, 0xAF,
0xA8, 0x05, 0xE7, 0x87, 0x08, 0x00, 0x24, 0xC0,
0xE7, 0x67, 0xDF, 0xFF, 0x24, 0xC0, 0xC8, 0x07,
0x0A, 0x00, 0xC0, 0x07, 0x00, 0x00, 0xC1, 0x07,
0x01, 0x00, 0x9F, 0xAF, 0x28, 0x05, 0x9F, 0xAF,
0xB8, 0x05, 0xC0, 0x07, 0x9E, 0x00, 0x9F, 0xAF,
0x44, 0x05, 0xE7, 0x67, 0xFF, 0xFE, 0x24, 0xC0,
0xC0, 0x09, 0x20, 0xC0, 0xE7, 0x87, 0x00, 0x01,
0x24, 0xC0, 0xC0, 0x77, 0x00, 0x02, 0x0F, 0xC1,
0xE7, 0x67, 0xF7, 0xFF, 0x24, 0xC0, 0xE7, 0x67,
0xF7, 0xFF, 0x24, 0xC0, 0xE7, 0x87, 0x08, 0x00,
0x24, 0xC0, 0x08, 0xDA, 0x5E, 0xC1, 0xEF, 0x07,
0x80, 0x00, 0x09, 0x06, 0x97, 0xCF, 0xEF, 0x07,
0x01, 0x00, 0x0A, 0x06, 0x97, 0xCF, 0xEF, 0x07,
0x00, 0x00, 0x0B, 0x06, 0xEF, 0x07, 0x00, 0x00,
0x0A, 0x06, 0xEF, 0x67, 0x7F, 0xFF, 0x09, 0x06,
0xEF, 0x07, 0x00, 0x00, 0x0D, 0x06, 0xE7, 0x67,
0xEF, 0xFF, 0x28, 0xC0, 0xE7, 0x67, 0x17, 0xD8,
0x24, 0xC0, 0xE7, 0x07, 0x00, 0x00, 0x1E, 0xC0,
0xE7, 0x07, 0xFF, 0xFF, 0x22, 0xC0, 0x97, 0xCF,
0xC8, 0x07, 0x0E, 0x06, 0x9F, 0xAF, 0xDA, 0x02,
0xE7, 0x07, 0x00, 0x00, 0xF2, 0x05, 0xE7, 0x07,
0x10, 0x00, 0xF6, 0x05, 0xE7, 0x07, 0x0E, 0x06,
0xF4, 0x05, 0xE7, 0x07, 0xD6, 0x02, 0xF8, 0x05,
0xC8, 0x07, 0xF2, 0x05, 0xC1, 0x07, 0x00, 0x80,
0x50, 0xAF, 0x97, 0xCF, 0x2F, 0x0C, 0x02, 0x00,
0x07, 0x06, 0x2F, 0x0C, 0x04, 0x00, 0x06, 0x06,
0xE7, 0x07, 0x00, 0x00, 0xF2, 0x05, 0xE7, 0x07,
0x10, 0x00, 0xF6, 0x05, 0xE7, 0x07, 0xE2, 0x05,
0xF4, 0x05, 0xE7, 0x07, 0xCE, 0x02, 0xF8, 0x05,
0xC8, 0x07, 0xF2, 0x05, 0xC1, 0x07, 0x00, 0x80,
0x51, 0xAF, 0x97, 0xCF, 0x9F, 0xAF, 0x66, 0x04,
0x9F, 0xAF, 0x1A, 0x03, 0x59, 0xAF, 0x97, 0xCF,
0xC0, 0x07, 0x0E, 0x00, 0xC1, 0x0B, 0x0C, 0x06,
0x41, 0xD1, 0x9F, 0xAF, 0x28, 0x05, 0xC0, 0x07,
0x3C, 0x00, 0x9F, 0xAF, 0x44, 0x05, 0x68, 0x00,
0xC0, 0x07, 0x3B, 0x00, 0x9F, 0xAF, 0x44, 0x05,
0x6F, 0x00, 0x0C, 0x06, 0x68, 0x00, 0xE0, 0x07,
0x04, 0x01, 0xE8, 0x0B, 0x0A, 0x06, 0xE8, 0x07,
0x00, 0x00, 0xE0, 0x07, 0x00, 0x02, 0xE0, 0x07,
0xEC, 0x01, 0xE0, 0x07, 0xFC, 0xFF, 0x97, 0xCF,
0xE7, 0x07, 0xFF, 0xFF, 0xFA, 0x05, 0xEF, 0x07,
0x00, 0x00, 0x0B, 0x06, 0xE7, 0x07, 0x0E, 0x06,
0x24, 0x01, 0xE7, 0x07, 0x0E, 0x06, 0xFE, 0x05,
0xE7, 0x07, 0x40, 0x00, 0x26, 0x01, 0xE7, 0x07,
0x40, 0x00, 0x04, 0x06, 0xE7, 0x07, 0x07, 0x00,
0x92, 0xC0, 0x97, 0xCF, 0xEF, 0x07, 0x02, 0x00,
0x0B, 0x06, 0x9F, 0xAF, 0x78, 0x01, 0xEF, 0x77,
0x80, 0x00, 0x07, 0x06, 0x9F, 0xC0, 0x14, 0x04,
0xEF, 0x77, 0x01, 0x00, 0x07, 0x06, 0x37, 0xC0,
0xEF, 0x77, 0x01, 0x00, 0x0D, 0x06, 0x0F, 0xC1,
0xEF, 0x07, 0x01, 0x00, 0x0D, 0x06, 0xC0, 0x07,
0x02, 0x00, 0xC1, 0x07, 0x30, 0x00, 0x9F, 0xAF,
0x28, 0x05, 0xC0, 0x07, 0x01, 0x00, 0xC1, 0x07,
0x02, 0x00, 0x9F, 0xAF, 0x28, 0x05, 0xC8, 0x07,
0xFF, 0x4F, 0x9F, 0xAF, 0xA8, 0x05, 0xC0, 0x07,
0x38, 0x00, 0x9F, 0xAF, 0x44, 0x05, 0xC1, 0x77,
0x03, 0x00, 0x02, 0xC1, 0x08, 0xDA, 0x75, 0xC1,
0xC1, 0x77, 0x01, 0x00, 0x0A, 0xC1, 0xC0, 0x07,
0x01, 0x00, 0xC1, 0x07, 0x02, 0x00, 0x9F, 0xAF,
0x28, 0x05, 0xEF, 0x07, 0x01, 0x00, 0x06, 0x06,
0x2C, 0xCF, 0xC0, 0x07, 0x01, 0x00, 0xC1, 0x07,
0x04, 0x00, 0x9F, 0xAF, 0x28, 0x05, 0xEF, 0x07,
0x00, 0x00, 0x06, 0x06, 0x22, 0xCF, 0xEF, 0x07,
0x00, 0x00, 0x0D, 0x06, 0xEF, 0x57, 0x01, 0x00,
0x06, 0x06, 0x1B, 0xC0, 0xC0, 0x07, 0x01, 0x00,
0xC1, 0x07, 0x01, 0x00, 0x9F, 0xAF, 0x28, 0x05,
0xC0, 0x07, 0x02, 0x00, 0xC1, 0x07, 0x30, 0x00,
0x9F, 0xAF, 0x28, 0x05, 0xC8, 0x07, 0xFF, 0x4F,
0x9F, 0xAF, 0xA8, 0x05, 0xC0, 0x07, 0x38, 0x00,
0x9F, 0xAF, 0x44, 0x05, 0xC1, 0x67, 0x03, 0x00,
0xC1, 0x57, 0x03, 0x00, 0x02, 0xC0, 0x08, 0xDA,
0x73, 0xC1, 0xC0, 0x07, 0x02, 0x00, 0xC1, 0x07,
0x12, 0x00, 0xEF, 0x57, 0x00, 0x00, 0x06, 0x06,
0x02, 0xC0, 0xC1, 0x07, 0x23, 0x00, 0x9F, 0xAF,
0x28, 0x05, 0xC0, 0x07, 0x14, 0x00, 0xC1, 0x0B,
0xEA, 0x05, 0x9F, 0xAF, 0x28, 0x05, 0xC0, 0x07,
0x3E, 0x00, 0x9F, 0xAF, 0x0A, 0x05, 0xE7, 0x09,
0xE4, 0x05, 0xFA, 0x05, 0x27, 0xD8, 0xFA, 0x05,
0xE7, 0x07, 0x0E, 0x06, 0xFC, 0x05, 0xE7, 0x07,
0x4E, 0x06, 0x00, 0x06, 0xE7, 0x07, 0x40, 0x00,
0x02, 0x06, 0x9F, 0xAF, 0x66, 0x05, 0x9F, 0xAF,
0xC6, 0x00, 0x97, 0xCF, 0xC1, 0x0B, 0xE2, 0x05,
0x41, 0xD0, 0x01, 0xD2, 0xC1, 0x17, 0x23, 0x00,
0x9F, 0xAF, 0xDC, 0x04, 0xC0, 0x07, 0x04, 0x00,
0xC1, 0x0B, 0xE3, 0x05, 0x9F, 0xAF, 0x28, 0x05,
0xC0, 0x07, 0x06, 0x00, 0xC1, 0x09, 0xE6, 0x05,
0x9F, 0xAF, 0x28, 0x05, 0xC0, 0x07, 0x07, 0x00,
0xC1, 0x09, 0xE6, 0x05, 0xC1, 0xD1, 0x9F, 0xAF,
0x28, 0x05, 0xC0, 0x07, 0x0B, 0x00, 0xC1, 0x09,
0xE8, 0x05, 0x9F, 0xAF, 0x28, 0x05, 0xC0, 0x07,
0x0C, 0x00, 0xC1, 0x09, 0xE8, 0x05, 0xC1, 0xD1,
0x9F, 0xAF, 0x28, 0x05, 0xC0, 0x07, 0x0D, 0x00,
0xC1, 0x07, 0x09, 0x00, 0x9F, 0xAF, 0x28, 0x05,
0xC0, 0x07, 0x03, 0x00, 0xC1, 0x07, 0x32, 0x00,
0x9F, 0xAF, 0x28, 0x05, 0xC0, 0x07, 0x0F, 0x00,
0xC1, 0x07, 0x00, 0x00, 0x9F, 0xAF, 0x28, 0x05,
0x97, 0xCF, 0xE7, 0x67, 0xFF, 0xD9, 0x24, 0xC0,
0xC8, 0x07, 0x0A, 0x00, 0x40, 0x00, 0xC0, 0x67,
0x00, 0x02, 0x27, 0x80, 0x24, 0xC0, 0xE7, 0x87,
0x00, 0x04, 0x24, 0xC0, 0xE7, 0x67, 0xFF, 0xF9,
0x24, 0xC0, 0x01, 0xD2, 0x08, 0xDA, 0x72, 0xC1,
0xE7, 0x87, 0x00, 0x20, 0x24, 0xC0, 0x97, 0xCF,
0x27, 0x00, 0x1E, 0xC0, 0xE7, 0x87, 0xFF, 0x00,
0x22, 0xC0, 0xE7, 0x67, 0x7F, 0xFF, 0x24, 0xC0,
0xE7, 0x87, 0x80, 0x00, 0x24, 0xC0, 0xE7, 0x87,
0x80, 0x00, 0x24, 0xC0, 0x97, 0xCF, 0x9F, 0xAF,
0x0A, 0x05, 0x67, 0x00, 0x1E, 0xC0, 0xE7, 0x67,
0xBF, 0xFF, 0x24, 0xC0, 0xE7, 0x87, 0x40, 0x00,
0x24, 0xC0, 0xE7, 0x87, 0x40, 0x00, 0x24, 0xC0,
0x97, 0xCF, 0x9F, 0xAF, 0x0A, 0x05, 0xE7, 0x67,
0x00, 0xFF, 0x22, 0xC0, 0xE7, 0x67, 0xFF, 0xFE,
0x24, 0xC0, 0xE7, 0x67, 0xFF, 0xFE, 0x24, 0xC0,
0xC1, 0x09, 0x20, 0xC0, 0xE7, 0x87, 0x00, 0x01,
0x24, 0xC0, 0x97, 0xCF, 0xC0, 0x07, 0x40, 0x00,
0xC8, 0x09, 0xFC, 0x05, 0xE7, 0x67, 0x00, 0xFF,
0x22, 0xC0, 0xE7, 0x67, 0xFF, 0xFE, 0x24, 0xC0,
0xE7, 0x67, 0xBF, 0xFF, 0x24, 0xC0, 0xE7, 0x67,
0xBF, 0xFF, 0x24, 0xC0, 0x00, 0xDA, 0xE8, 0x09,
0x20, 0xC0, 0xE7, 0x87, 0x40, 0x00, 0x24, 0xC0,
0xE7, 0x87, 0x40, 0x00, 0x24, 0xC0, 0x00, 0xDA,
0xE8, 0x09, 0x20, 0xC0, 0x6D, 0xC1, 0xE7, 0x87,
0x00, 0x01, 0x24, 0xC0, 0x97, 0xCF, 0xE7, 0x07,
0x32, 0x00, 0x12, 0xC0, 0xE7, 0x77, 0x00, 0x80,
0x12, 0xC0, 0x7C, 0xC0, 0x97, 0xCF, 0xE7, 0x07,
0x20, 0x4E, 0x12, 0xC0, 0xE7, 0x77, 0x00, 0x80,
0x12, 0xC0, 0x7C, 0xC0, 0x97, 0xCF, 0x09, 0x02,
0x19, 0x00, 0x01, 0x01, 0x00, 0x80, 0x96, 0x09,
0x04, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
0x07, 0x05, 0x81, 0x02, 0x40, 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, 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, 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, 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
};
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
struct video_device vdev; // v4l video device
struct usb_device *udev; // usb device
struct semaphore busy_lock; // guard against SMP multithreading
bool is_initialized;
bool is_removed;
bool is_opened;
u8 bulkEndpoint;
bool needsDummyRead;
u32 framebuf_size; // # of valid bytes in framebuf
u32 framebuf_read_start; // position in frame buf that a read is happening at.
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *proc_entry;
#endif
};
static void *vicam_probe(struct usb_device *dev, unsigned int ifnum,
const struct usb_device_id *id);
static void vicam_disconnect(struct usb_device *dev, void *ptr);
static void read_frame(struct vicam_camera *cam, int framenum);
static void vicam_purge(struct vicam_camera *cam);
static int
send_control_msg(struct usb_device *udev, u8 request, u16 value, u16 index,
unsigned char *cp, u16 size)
{
int status;
// for reasons not yet known to me, you can't send USB control messages
// with data in the module (if you are compiled as a module). Whatever
// the reason, copying it to memory allocated as kernel memory then
// doing the usb control message fixes the problem.
unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
memcpy(transfer_buffer, cp, size);
status = usb_control_msg(udev,
usb_sndctrlpipe(udev, 0),
request,
USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, value, index,
transfer_buffer, size, HZ);
kfree(transfer_buffer);
if (status < 0) {
printk(KERN_INFO "Failed sending control message, error %d.\n",
status);
}
return status;
}
static int
initialize_camera(struct vicam_camera *cam)
{
struct usb_device *udev = cam->udev;
int status;
if ((status =
send_control_msg(udev, 0xff, 0, 0, setup1, sizeof (setup1))) < 0)
return status;
if ((status =
send_control_msg(udev, 0xff, 0, 0, setup2, sizeof (setup2))) < 0)
return status;
if ((status =
send_control_msg(udev, 0xff, 0, 0, setup3, sizeof (setup3))) < 0)
return status;
if ((status =
send_control_msg(udev, 0xff, 0, 0, setup4, sizeof (setup4))) < 0)
return status;
if ((status =
send_control_msg(udev, 0xff, 0, 0, setup5, sizeof (setup5))) < 0)
return status;
if ((status =
send_control_msg(udev, 0xff, 0, 0, setup3, sizeof (setup3))) < 0)
return status;
return 0;
}
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 video_device *dev, unsigned int ioctlnr, void *arg)
{
struct vicam_camera *cam = dev->priv;
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");
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(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;
if(copy_from_user(&vp, (struct video_picture *) arg,
sizeof(struct video_picture)))
retval = -EFAULT;
else
{
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;
if (copy_from_user(&vw, 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
((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 video_device *dev, int flags)
{
struct vicam_camera *cam =
(struct vicam_camera *) dev->priv;
int intr;
DBG("open\n");
if (!cam) {
printk(KERN_ERR
"vicam video_device improperly initialized");
}
intr = down_interruptible(&cam->busy_lock);
if (intr)
return -EINTR;
if (cam->is_opened) {
printk(KERN_INFO
"vicam_open called on already opened camera");
up(&cam->busy_lock);
return -EBUSY;
}
if (!cam->raw_image) {
cam->raw_image = kmalloc(VICAM_MAX_READ_SIZE, GFP_KERNEL);
if (!cam->raw_image) {
up(&cam->busy_lock);
return -ENOMEM;
}
}
if (!cam->framebuf) {
cam->framebuf =
usbvideo_rvmalloc(VICAM_MAX_FRAME_SIZE * VICAM_FRAMES);
if (!cam->framebuf) {
kfree(cam->raw_image);
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->is_opened = 1;
up(&cam->busy_lock);
return 0;
}
static void
vicam_close(struct video_device *dev)
{
struct vicam_camera *cam = (struct vicam_camera *) dev->priv;
DBG("close\n");
if (cam->is_removed) {
vicam_purge(cam);
} else {
set_camera_power(cam, 0);
cam->is_opened = 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[16];
int realShutter;
int n;
int actual_length;
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
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, 500);
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 );
cam->framebuf_size =
320 * 240 * VICAM_BYTES_PER_PIXEL;
cam->framebuf_read_start = 0;
return;
}
static long
vicam_read(struct video_device *dev, char *buf,
unsigned long count, int noblock)
{
struct vicam_camera *cam = dev->priv;
int intr;
DBG("read %d bytes.\n", (int) count);
if (!buf)
return -EINVAL;
if (!count)
return -EINVAL;
// This is some code that will hopefully allow us to do shell copies from
// the /dev/videoX to a file and have it actually work.
if (cam->framebuf_size != 0) {
if (cam->framebuf_read_start == cam->framebuf_size) {
cam->framebuf_size = cam->framebuf_read_start = 0;
return 0;
} else {
if (cam->framebuf_read_start + count <=
cam->framebuf_size) {
// count does not exceed available bytes
if (copy_to_user(buf,
(cam->framebuf) +
cam->framebuf_read_start, count))
return -EFAULT;
cam->framebuf_read_start += count;
return count;
} else {
count =
cam->framebuf_size -
cam->framebuf_read_start;
if (copy_to_user(buf,
(cam->framebuf) +
cam->framebuf_read_start, count))
return -EFAULT;
cam->framebuf_read_start = cam->framebuf_size;
return count;
}
}
}
intr = down_interruptible(&cam->busy_lock);
if (intr)
return -EINTR;
if (cam->needsDummyRead) {
read_frame(cam, 0);
cam->needsDummyRead = 0;
}
// read_frame twice because the camera doesn't seem to take the shutter speed for the first one.
read_frame(cam, 0);
if (count > cam->framebuf_size)
count = cam->framebuf_size;
if (copy_to_user(buf, cam->framebuf, count)) {
up(&cam->busy_lock);
return -EFAULT;
}
if (count != cam->framebuf_size)
cam->framebuf_read_start = count;
else
cam->framebuf_size = 0;
up(&cam->busy_lock);
return count;
}
static int
vicam_mmap(struct video_device *dev, const char *adr, unsigned long size)
{
// TODO: allocate the raw frame buffer if necessary
unsigned long start = (unsigned long) adr;
unsigned long page, pos;
struct vicam_camera *cam = dev->priv;
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;
if (!cam->framebuf) { /* we do lazy allocation */
cam->framebuf =
usbvideo_rvmalloc(VICAM_MAX_FRAME_SIZE * VICAM_FRAMES);
if (!cam->framebuf) {
up(&cam->busy_lock);
return -ENOMEM;
}
}
pos = (unsigned long) (cam->framebuf);
while (size > 0) {
page = usbvideo_kvirt_to_pa(pos);
if (remap_page_range(start, page, PAGE_SIZE, PAGE_SHARED)) {
up(&cam->busy_lock);
return -EAGAIN;
}
start += PAGE_SIZE;
pos += PAGE_SIZE;
if (size > PAGE_SIZE)
size -= PAGE_SIZE;
else
size = 0;
}
up(&cam->busy_lock);
return 0;
}
#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *vicam_proc_root = NULL;
static int
vicam_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
char *out = page;
int len;
struct vicam_camera *cam = (struct vicam_camera *) data;
out +=
sprintf(out, "Vicam-based WebCam Linux Driver.\n");
out += sprintf(out, "(c) 2002 Joe Burks (jburks@wavicle.org)\n");
out += sprintf(out, "vicam stats:\n");
out += sprintf(out, " Shutter Speed: 1/%d\n", cam->shutter_speed);
out += sprintf(out, " Gain: %d\n", cam->gain);
len = out - page;
len -= off;
if (len < count) {
*eof = 1;
if (len <= 0)
return 0;
} else
len = count;
*start = page + off;
return len;
}
static int
vicam_write_proc(struct file *file, const char *buffer,
unsigned long count, void *data)
{
char *in;
char *start;
struct vicam_camera *cam = (struct vicam_camera *) data;
in = kmalloc(count + 1, GFP_KERNEL);
if (!in)
return -ENOMEM;
in[count] = 0; // I'm not sure buffer is gauranteed to be null terminated
// so I do this to make sure I have a null in there.
strncpy(in, buffer, count);
start = strstr(in, "gain=");
if (start
&& (start == in || *(start - 1) == ' ' || *(start - 1) == ','))
cam->gain = simple_strtoul(start + 5, NULL, 10);
start = strstr(in, "shutter=");
if (start
&& (start == in || *(start - 1) == ' ' || *(start - 1) == ','))
cam->shutter_speed = simple_strtoul(start + 8, NULL, 10);
kfree(in);
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(void *ptr)
{
struct vicam_camera *cam = (struct vicam_camera *) ptr;
char name[7];
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);
ent =
create_proc_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
vicam_proc_root);
if (!ent)
return;
ent->data = cam;
ent->read_proc = vicam_read_proc;
ent->write_proc = vicam_write_proc;
ent->size = 512;
cam->proc_entry = ent;
}
void
vicam_destroy_proc_entry(void *ptr)
{
struct vicam_camera *cam = (struct vicam_camera *) ptr;
char name[7];
if (!cam || !cam->proc_entry)
return;
sprintf(name, "video%d", cam->vdev.minor);
remove_proc_entry(name, vicam_proc_root);
cam->proc_entry = NULL;
}
#endif
int
vicam_video_init(struct video_device *vdev)
{
// This would normally create the proc entry for this camera
#ifdef CONFIG_PROC_FS
vicam_create_proc_entry(vdev->priv);
#endif
return 0;
}
static long
vicam_write(struct video_device *v, const char *buf, unsigned long count,
int nonblock)
{
return -EINVAL;
}
static struct video_device vicam_template = {
owner:THIS_MODULE,
name:"ViCam-based USB Camera",
type:VID_TYPE_CAPTURE,
hardware:VID_HARDWARE_VICAM,
open:vicam_open,
close:vicam_close,
read:vicam_read,
write:vicam_write,
ioctl:vicam_ioctl,
mmap:vicam_mmap,
initialize:vicam_video_init,
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 void *
vicam_probe(struct usb_device *dev, unsigned int ifnum,
const struct usb_device_id *id)
{
int nas, bulkEndpoint = 0;
const struct usb_interface_descriptor *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 NULL;
}
printk(KERN_INFO "ViCam based webcam connected\n");
nas = dev->actconfig->interface[ifnum].num_altsetting;
if (nas != 1) {
printk(KERN_WARNING
"Expected only one alternate setting for this camera!\n");
return NULL;
}
interface = &dev->actconfig->interface[ifnum].altsetting[0];
DBG(KERN_DEBUG "Interface %d. has %u. endpoints!\n",
ifnum, (unsigned) (interface->bNumEndpoints));
endpoint = &interface->endpoint[0];
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 NULL;
}
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 NULL;
}
printk(KERN_INFO "ViCam webcam driver now controlling video device %d\n",cam->vdev.minor);
return cam;
}
static void
vicam_purge(struct vicam_camera *cam)
{
video_unregister_device(&cam->vdev);
#ifdef CONFIG_PROC_FS
vicam_destroy_proc_entry(cam);
#endif
if (cam->raw_image)
kfree(cam->raw_image);
if (cam->framebuf)
usbvideo_rvfree(cam->framebuf,
VICAM_MAX_FRAME_SIZE * VICAM_FRAMES);
kfree(cam);
printk(KERN_DEBUG "ViCam-based WebCam disconnected\n");
}
static void
vicam_disconnect(struct usb_device *dev, void *ptr)
{
struct vicam_camera *cam = ptr;
if (cam->is_opened) {
cam->is_removed = 1;
} else {
vicam_purge(cam);
}
}
/*
*/
static int __init
usb_vicam_init(void)
{
DBG(KERN_INFO "ViCam-based WebCam driver startup\n");
#ifdef CONFIG_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);
#ifdef CONFIG_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");
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