linux kernel driver tutorial

The bitwise operation of the Linux kernel driver atomic_t is good in integer arithmetic. However, it cannot work well when you need to perform an atomic operation on a single bit. Therefore, the kernel provides a set of functions to modify or test a single bit atomically. Because the entire operation is in the single..

Release date:Updated on: Affected Systems:Linux kernel 2.6.xDescription:--------------------------------------------------------------------------------Bugtraq id: 49411Cve id: CVE-2011-2909 Linux Kernel is the Kernel of the Linux operating system.

Linux-2.6.35 Kernel Porting mdash; Nic Driver porting I. porting environment: 1. Ubuntu10.10 Release 2. u-boot.binhttp: // others... linux-2.6.35 kernel transplantation-NIC driver transplantation I. porting environment: 1. Ubuntu

This article from the csdn blog, reproduced please indicate the source: http://blog.csdn.net/z2007b/archive/2011/05/19/6432997.aspx //************************************** *************** Linux Kernel Lecture Hall (1) cornerstone Driver Model for device drivers (6) In the previous section, we roughly analyzed how driver_register works. Some details are not in p

The Linux kernel driver compiles multiple C files into one ko file. Each C file contains module_init, module_exit, and moduleinit. Take two C files as an example: Compile adc_device.c and adc_driver.c of adc_device.ko and adc_driver.ko into a ko file! Method: Step 1: Modify the C file1. Remove the keyword static for the prototype of the xxx and yyy functions in m

)); + smdk_machine_init (); - $ $ -/drivers/input/touchscreen/S3C2410_TS.C -+ + linux-3.0-s3c2440/drivers/input/touchscreen/s3c2410_ts.c -- -- - One: -:58.555435668+0800 the@@ -126,6+126,7 @@ - input_report_abs (Ts.input, abs_y, TS.YP);Wuyi theInput_report_key (Ts.input, Btn_touch,1); -+ Input_report_abs (ts.input, Abs_pressure,1);/*Add by Guowenxue, 2012.03.30*/ Wu Input_sync (ts.input); - AboutTS.XP =0; $@@ - $,6+141,7 @@ -Ts.count =0; - -

The Linux kernel defines different priority levels for different driver load sequences, as shown in the following macro: Include/linux/init.h #define Pure_initcall (FN) __define_initcall ("0", fn,1)#define Core_initcall (FN) __define_initcall ("1", fn,1)#define CORE_INITCALL_SYNC (FN) __define_initcall ("1s", fn,1s)#de

Release date:Updated on: 2012-08-02 Affected Systems:Linux kernel 3.2.xDescription:--------------------------------------------------------------------------------Bugtraq id: 54763Cve id: CVE-2012-3412 Linux is the most popular operating system kernel for free computers. When Linux

Linux kernel driver development-Linux general technology-Linux programming and kernel information. For more information, see the following. I. Some General C questions Question 1: Write the following program results: Int m [] [3]

Linus Torvalds announces the 3.12 stable version of the kernel, bringing a number of driver updates and improvements, such as Radeon Graphics, AMD APU, Qualcomm Owl/adreno,nvidia Optimus, various file systems and other driver updates. Linus in the mailing list said: "I was hesitant to come to a RC8, but next week to travel, the internet is not good, or no delay.

-$ (config_test_cpu) + = CPU.OIn order for the entire test directory to be compiled commands, the Makefile in the test directory parent Directory also needs to be added as followsScript:Obj-$ (config_test) + = test/Adding obj-$ (config_test) + = test/in Drivers/makefile allows the user to compile the kernelAccess to the test directory.After adding Kconfig and Makefile, the new test tree directory is:| --test| --CPU| --CPU.C| --Makefile| --TEST.C| --TEST_CLIENT.C| --TEST_IOCTL.C| --TEST_PROC.C| -

[PURPOSE]On the FS2410 Development Board for linux-2.6.22.6 kernel transplantation, this part of the completion of the USB device driver to complete the corresponding functions.[Lab environment]1. Ubuntu10.10 release2. FS2410 platform and u-boot-1.3.1 transplanted in the Development Board3. Cross-compiler arm-linux-gnu

register the device directly in the platform fileRegistering your deviceThe registered device uses the struct platform_device, the struct body in the header file "vimInclude/linux/platform_device.h"in. The header file also has a registered device and an uninstallfunction, you can understand.? Operation Process– Register the device. The device structure is placed in the platform file and the device is automatically registered without the need to adjus

Linux-2.6.35 kernel transplantation-NIC Driver transplantation I. Porting environment: 1. Ubuntu 10.10 Release 2. u-boot.bin http://download.csdn.net/detail/baby_afu/44128263. target machine: FS_S5PC100 Platform 4. Cross Compiler arm-cortex_a8-linux-gnueabi-gcc ----------------------------------------------------------

Ov511usb camera driver with Linux-2.4.18 kernel transplanted on S3C2410 Development Board Content1. Driver2. Application writing 1. DriverThe Linux-2.4.18 is a drive with an ov511 camera by default, selected from the USB device, and activated the video option to support ov511. 2. Application writingThis is a program

It took a long time to program the Linux character device for the first time today. The problems found are as follows: Note the following: 1. the compiling module does not need to compile the kernel. Compile the device module in Ubuntu as follows: 2. After insmod, you need to use mknod for device ing. In this case, check the value of the master device in CAT/proc/devices. Example: mknod/dev/TFS 250 0 3. Whe

Utils.h file:#ifndef __utils_h__ #define __utils_h__void a2f (Char *s); #endifUTILS.C file:#include #include#include#include#includestring.h>#include"Utils.h"#defineFile_path "/hzh"Static structFile *FP;Static intopen_it () {if(FP)return 0; mm_segment_t Oldfs; intErr =0; Oldfs=Get_fs (); Set_fs (Get_ds ()); FP= Filp_open (File_path, o_creat| o_rdwr| O_append,0); Write to File Set_fs (OLDFS) in append mode; if(Is_err (FP)) {ERR=Ptr_err (FP); return 1; } return 0;}Static voidclose_it (

Take two C files as an example:The adc_device.c, Adc_ driver.c, which should have been compiled separately into adc_Device.ko and adc_Driver.ko, are compiled into a KO file!Method of Adoption:First step, modify C file1, remove adc_device.c file module_init (XXX), Module_exit (yyy) in the XXX, yyy function prototype keyword static2, Logout adc_device.c file module_init (XXX), module_exit (yyy) function3. Add the above xxx, yyy functions declared with the keyword extern in the adc_driver.c file.4,

such a thing as, do not have to delve into. Do not learn "dragon Slayer", now basicallyis to register the device directly in the platform fileRegistering your deviceThe registered device uses the struct platform_device, the struct body in the header file "vimInclude/linux/platform_device.h"in. The header file also has a registered device and an uninstallfunction, you can understand.• Operation Process– Register the device. The device structure is pla

1. Enter the catalogue Linux-kernel-samsung-dev\drivers\char2. Create a new target directory of 01.led, copy the drive related files to this directoryNote: You need to ensure that the copied driver files are drivers that work3. Write Kconfig file in directory 01.ledMenu "XXX"Config xxx_ledTriState "Xxx_ggg210_led"Default nHelpThe LED water made by XXX which is us