linux device drivers programming at kernel level

directory based on the name of the driver and the associated bus Get the lock inside the bus, then traverse all the devices registered with the bus and call the match function for those devices Remove Driver Call the Pci_unregister_driver function The function uses the DEVICE_DRIVER structure contained in the PCI_DRIVER structure as a parameter to invoke the driver core function Driver_unregister The Driver_unregister function clear

/** * Author:hasen * Reference: Linux device Driver Development Details * Introduction: Android small Novice Linux * device driver Development Learning Journey * Topic: Concurrency and race in Linux device

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

kernel unsigned long copy_to_user (void __user *to, const void * from, unsigned long count) unsigned long copy_from_user (void *to, const void __user *from, unsigned long count); Any function that accesses user space must be reentrant, must be able to execute concurrently with other driver functions, and must be in a state that can legally hibernate Read method If the return value is equa

In the Linux kernel, The framebuffer (POST buffer) driver is the display driver standard. framebuffer abstracts the display device as the POST buffer. After the user maps the memory to the process address space, you can directly perform read/write operations, and write operations can be immediately displayed on the screen. Related display

);Module_exit (globalvar_exit ); /* Application: globalvartest. c */ # Include # Include # Include # Include Int main (){Int fd, num;// Open "/dev/CDEV_ZHU"Fd = open ("/dev/CDEV_ZHU", O_RDWR, S_IRUSR | S_IWUSR );If (fd! =-1){// First read global_varRead (fd, num, sizeof (int ));Printf ("The globalvar is % d \ n", num );// Write global_varPrintf ("Please input the num written to globalvar \ n ");Scanf ("% d", num );Write (fd, num, sizeof (int ));// Read global_var againRead (fd, num, sizeof

understanding of the Linux kernel is a classic book that helps you learn the Linux kernel. Some beginners, without guidance from anyone, are immersed in the sea of Linux kernel code. After learning for a long time, they are still

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

Introduction plan for linux Device Drivers-general Linux technology-Linux programming and kernel information. For details, see the following section. Ldd2, that is,