Excerpt from: http://blog.chinaunix.net/uid-20799298-id-99675.htmlThe original text is writing device driver in linux:a Brief tutorial.This article focuses on three examples to explain the Linux driver, so that novice quickly, from the code layer to understand what is the Linux device driver.This article is a note, in general translation of the first two parts of the article, namely the first two examples,
file has a. h file, which is the path of. h Modules: $ (make)-C $ (kernel_dir) m=$ (PWD) modules #$ (make)-i$ (INCLUDE)-C $ (Kernel_dir) m=$ (PWD) modules//if the. C file has an. h file, use this compilation syntax. Phony:modules Cleanc Lean: $ (make)-C $ (kernel_dir) m=$ (PWD) cleanElseobj-M: = gpio-sama5d3-Test.oendifAfter you have finished writing the above two files, save the exit.# makeThe. ko file is generated# insmod ****.ko-------Mount Drive#lsmod--------to view mounted
adapter to some" other PCI slot. If you are using a current kernel and BIOS, the "problem to" Linux-kernel mailing list with details about your m Otherboard and BIOS.
One suggestion for Google's return of a large number of results is to set the OLD_SCHEME_FIRST flag so that drivers prioritize devices that use older structures:
Set Old_scheme_first=y
The test results didn't help much, and that was not the
With the release of Linux2.6, the drivers for each device are rewritten to varying degrees due to the new changes made by the 2.6 kernel. For the convenience of Linux enthusiasts, I put my own share out of this worthless file. This article lists the vast majority of changes in the 2.6 kernel with previous versions, but unfortunately the use of individual functions is not listed in detail due to limited time
Sina Weibo @ song Baohua Barry at @ micro disk share Prentice. Hall Press "essential. Linux. device. Drivers" Chinese version of the high definition electronic version "Baohua _essence linuxlinuxequipment driver development" http://t.cn/zYjS7sh
Contents
Chapter 1 Introduction 11.1 Evolution 11.2 GNU Copyleft 21.3 kernel.org 21.4 email list and Forum 31.5 Linux R
Express Adapter.
Drivers for wired NICs can be downloaded from the Intel official website. installation and configuration instructions are provided. The URL isHttp://downloadcenter.intel.com.Go to Ethernet Components> Ethernet Controllers> Intel on the left.®82567 Gigabit Ethernet Controller: download the latest driver. For installation instructions, see the README file. The procedure is as follows:Decompress the package and enter the src/folder. Run
Article Title: Security Port allocation for device drivers in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
Abstract:
Writing Device D
question: I want to know what modules are built into the kernel in the Linux system and what parameters each module has. Is there a way to get a list of built-in modules and device drivers, along with their detailed information?
The modern Linux kernel is growing rapidly over time to support a large number of hardware, file systems, and network functions. During
learn how to add executable programs written in C in the Android system.I. Refer to the article on writing Linux kernel drivers for Android systems on Ubuntu, and prepare the Linux drivers. Use the Android emulator to load the kernel file that contains this Linux driver, an
in the queue, and returns null if none. Do not delete this request after processing struct Sbull_dev *dev = Req->rq_disk->private_data ; if (! blk_fs_request (req)) {//Determine if a file system request is not a block device request PRINTK (kern_notice "Skip non-fs request.\ n "); end_request (req, 0); continue; } The//sbull_transfer () function is a real processing block device request function Sbull_transfer (d EV, Req->sector, req->current_nr_sectors, req->buffer, Rq_data_dir (req)); en
In the fourth chapter of the book "Linux device Drivers", we specialize in the debugging technology in driver development.PRINTK is just one of the techniques that requires PRINTK to print messages and write to files on disk, which slows down the entire code execution speed.There are also debugging techniques, and the effect on Code execution speed is smaller than prink.In this, we can have the driver creat
);
Read-copy-update
Read-copy-update (RCU) is also an advanced mutex mechanism.
Rarely used in drivers
Http://www.rdrop.com/users/paulmck/rclock/intro/rclock_intro.html
Optimized for situations where reads are frequent and rarely written
The protected resource should be accessed through a pointer
When the data structure needs to be modified, the write thread replicates first,
Skb_release_data function has 0xc4 so large, and oops occurs at 0x74 place. So let's take a look at where the Skb_release_data starts:#grep Skb_release_data./system.mapC0282AF4 T Skb_release_dataSo we know that when the system error occurs, the program pointer is c0282af4+0x74=c0282b68(2) Then use GDB to view the GDB./vmlinux (executed under the Linux directory) and enter debug mode.gdb$ b *0xc0282b68Breakpoint 1 at 0xc0282b68:file NET/CORE/SKBUFF.C,
In this Linux-driven development, a network approach is introduced to introduce two ways to drive development:I. Driver compilation to the kernel1. First select a location to place the driver code, for example: DRIVERS/CHAR/XXX.C2. Add the following to the Drivers/char/kconfig file:Menu "XXX Support"Config xxxTriState "XXX Support"---help---XXX use GPIO as IR inp
I. OverviewThe driver for the battery portion of the Android system inherits the power supply driver architecture from the traditional Linux system, and the battery driver generates the appropriate SYS file system via the power supply driver. This provides the interface to the user space for various properties of the battery. LinuxThe standard Power supply driver uses a file system path of:/sys/class/power_supply, where each subdirectory represents an
Http://21cnbao.blog.51cto.com/109393/336263 1.1 Device Driver core layer and examples in the object-oriented programming, you can define a base class for a similar thing, specific things can inherit the functions in this base class. If the implementation of a function of the inherited object is the same as that of the base class, it can directly inherit the functions of the base class. On the contrary, it can be overloaded. This object-oriented design method greatly improves the code reusable ab
be added to the kernel at run time is called a "module." The Linux kernel supports several types of modules, including but not limited to device drivers. Each module consists of the target code, which can be used to connect the module to the running kernel using the INSMOD program, or to remove the connection using the Rmmod program.The Linux system divides the
To understand the Linux PCI device driver, first understand that the so-called Linux PCI device driver actually includesLinux PCI device drivers and Device Drivers. I do not know whether the reader understands this sentence. I think this sentence is very important. For drivers
The compiling process of Linux kernel modules and drivers-general Linux technology-Linux programming and kernel information. The following is a detailed description. The Linux kernel is an integral structure, so it is very difficult to add anything to or delete some features
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