linux下的usb摄像头驱动

/* * SPCA5xx based usb camera driver (currently supports * yuv native stream spca501a, spca501c, spca505, spca508, spca506 * jpeg native stream spca500, spca551, spca504a, spca504b, spca533a, spca536a, zc0301, zc0302, cx11646, sn9c102p * bayer native stream spca561a, sn9c101, sn9c102, tv8532 ). * Z-star Vimicro chips zc0301 zc0301P zc0302 * Sunplus spca501a, spca501c, spca505, spca508, spca506, spca500, spca551, spca504a, spca504b, spca533a, spca536a * Sonix sn9c101, sn9c102, sn9c102p sn9c105 sn9c120 * Conexant cx11646 * Transvision tv_8532 * Etoms Et61x151 Et61x251 * Pixat Pac207-BCA-32 * SPCA5xx version by Michel Xhaard <mxhaard@users.sourceforge.net> * Based on : * SPCA50x version by Joel Crisp <cydergoth@users.sourceforge.net> * OmniVision OV511 Camera-to-USB Bridge Driver * Copyright (c) 1999-2000 Mark W. McClelland * Kernel 2.6.x port Michel Xhaard && Reza Jelveh (feb 2004) * Based on the Linux CPiA driver written by Peter Pregler, * Scott J. Bertin and Johannes Erdfelt. * 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. */ static const char version[] = SPCA5XX_VERSION; #include <linux/config.h> #include <linux/module.h> #include <linux/version.h> #include <linux/init.h> #include <linux/fs.h> #include <linux/vmalloc.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/mm.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/proc_fs.h> #include <linux/ctype.h> #include <linux/pagemap.h> #include <linux/usb.h> #include <asm/io.h> #include <asm/semaphore.h> #include <asm/page.h> #include <asm/uaccess.h> #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) /* only on 2.6.x */ #include <linux/jiffies.h> #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0) #include <linux/wrapper.h> #endif #include <linux/param.h> #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 9) #include <linux/moduleparam.h> #endif #include "spca5xx.h" #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) # undef CONFIG_VIDEO_PROC_FS # undef CONFIG_PROC_FS #endif //#define RH9_REMAP 1 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0) #include "spcaCompat.h" #ifndef pte_offset_kernel # define pte_offset_kernel(dir, address) pte_offset(dir, address) #endif #endif #include "spcadecoder.h" #include "jpeg_qtables.h" #define PROC_NAME_LEN 10 //length of the proc name /* Video Size 640 x 480 x 4 bytes for RGB */ #define MAX_FRAME_SIZE (640 * 480 * 4) #define MAX_DATA_SIZE (MAX_FRAME_SIZE + sizeof(struct timeval)) /* Hardware auto exposure / whiteness (PC-CAM 600) */ static int autoexpo = 1; #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,5) /* Video device number (-1 is first available) */ static int video_nr = -1; #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,5) */ /* 0=no debug messages * 1=init/detection/unload and other significant messages, * 2=some warning messages * 3=config/control function calls * 4=most function calls and data parsing messages * 5=highly repetitive mesgs * NOTE: This should be changed to 0, 1, or 2 for production kernels */ static int debug = 0; /* Force image to be read in RGB instead of BGR. This option allow * programs that expect RGB data (e.g. gqcam) to work with this driver. */ static int force_rgb = 0; static int gamma = 3; static int OffRed = 0; static int OffBlue = 0; static int OffGreen = 0; static int GRed = 256; static int GBlue = 256; static int GGreen = 256; static int usbgrabber = 0; #ifdef SPCA50X_ENABLE_COMPRESSION /* Enable compression. This is for experimentation only; compressed images * still cannot be decoded yet. */ static int compress = 0; #endif /* SPCA50X_ENABLE_COMPRESSION */ #ifdef SPCA5XX_ENABLE_REGISTERPLAY static int RegAddress = 0; static int RegValue = 0; static int RegStrobe = 0; #endif /* SPCA5XX_ENABLE_REGISTERPLAY */ /* Initial brightness & contrast (for debug purposes) */ static int bright = 0x80; static int contrast = 0x60; /* Parameter that enables you to set the minimal suitable bpp */ static int min_bpp = 0; /* Parameter defines the average luminance that should be kept */ static int lum_level = 0x2d; #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 9) module_param(autoexpo, int, 0644); module_param(debug, int, 0644); module_param(force_rgb, int, 0644); module_param(gamma, int, 0644); module_param(OffRed, int, 0644); module_param(OffBlue, int, 0644); module_param(OffGreen, int, 0644); module_param(GRed, int, 0644); module_param(GBlue, int, 0644); module_param(GGreen, int, 0644); #ifdef SPCA50X_ENABLE_COMPRESSION module_param(compress, int, 0644); #endif /* SPCA50X_ENABLE_COMPRESSION */ module_param(bright, int, 0444); module_param(contrast, int, 0444); module_param(min_bpp, int, 0444); module_param(lum_level, int, 0444); module_param(usbgrabber, int, 0444); #ifdef SPCA5XX_ENABLE_REGISTERPLAY module_param(RegAddress, int, 0644); module_param(RegValue, int, 0644); module_param(RegStrobe, int, 0644); #endif /* SPCA5XX_ENABLE_REGISTERPLAY */ #else /* LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 9) */ MODULE_PARM(autoexpo, "i"); MODULE_PARM(debug, "i"); MODULE_PARM(force_rgb, "i"); MODULE_PARM(gamma, "i"); MODULE_PARM(OffRed, "i"); MODULE_PARM(OffBlue, "i"); MODULE_PARM(OffGreen, "i"); MODULE_PARM(GRed, "i"); MODULE_PARM(GBlue, "i"); MODULE_PARM(GGreen, "i"); #ifdef SPCA50X_ENABLE_COMPRESSION MODULE_PARM(compress, "i"); #endif /* SPCA50X_ENABLE_COMPRESSION */ MODULE_PARM(bright, "i"); MODULE_PARM(contrast, "i"); MODULE_PARM(min_bpp, "i"); MODULE_PARM(lum_level, "0-255i"); MODULE_PARM(usbgrabber, "i"); #endif /***************/ MODULE_PARM_DESC(autoexpo, "Enable/Disable auto exposure (default=1: enabled) (PC-CAM 600/Zc03xx/spca561a/Etoms Only !!!)"); MODULE_PARM_DESC(debug, "Debug level: 0=none, 1=init/detection, 2=warning, 3=config/control, 4=function call, 5=max"); MODULE_PARM_DESC(force_rgb, "Read RGB instead of BGR"); MODULE_PARM_DESC(gamma, "gamma setting range 0 to 7 3-> gamma=1"); MODULE_PARM_DESC(OffRed, "OffRed setting range -128 to 128"); MODULE_PARM_DESC(OffBlue, "OffBlue setting range -128 to 128"); MODULE_PARM_DESC(OffGreen, "OffGreen setting range -128 to 128"); MODULE_PARM_DESC(GRed, "Gain Red setting range 0 to 512 /256 "); MODULE_PARM_DESC(GBlue, "Gain Blue setting range 0 to 512 /256 "); MODULE_PARM_DESC(GGreen, "Gain Green setting range 0 to 512 /256 "); #ifdef SPCA50X_ENABLE_COMPRESSION MODULE_PARM_DESC(compress, "Turn on/off compression (not functional yet)"); #endif /* SPCA50X_ENABLE_COMPRESSION */ MODULE_PARM_DESC(bright, "Initial brightness factor (0-255) not know by all webcams !!"); MODULE_PARM_DESC(contrast, "Initial contrast factor (0-255) not know by all webcams !!"); MODULE_PARM_DESC(min_bpp, "The minimal color depth that may be set (default 0)"); MODULE_PARM_DESC(lum_level, "Luminance level for brightness autoadjustment (default 32)"); MODULE_PARM_DESC(usbgrabber, "Is a usb grabber 0x0733:0x0430 ? (default 1) "); #ifdef SPCA5XX_ENABLE_REGISTERPLAY MODULE_PARM_DESC(RegAddress, "Register Address of PAC207"); MODULE_PARM_DESC(RegValue, "Register Value for PAC207"); MODULE_PARM_DESC(RegStrobe, "Strobe to read or write a register 1=write, 2=read"); #endif /* SPCA5XX_ENABLE_REGISTERPLAY */ /****************/ MODULE_AUTHOR ("Michel Xhaard <mxhaard@users.sourceforge.net> based on spca50x driver by Joel Crisp <cy