logitech linux drivers

Notes for compiling Linux network drivers 3.1 interrupt sharing In Linux, several devices run to share the same interrupt. If you need to share, specify the sharing method when applying. Definition of system-provided request_irq () call: Int request_irq (unsigned int IRQ,Void (* Handler) (int irq, void * dev_id, struct pt_regs * regs ),Unsigned long flags,Const

reached 66MHz or even 133MHz Equipped with a 32-bit data bus, and the specification already includes 64-bit extensions Platform independence as much as possible simplifies the task of adding and removing peripherals to the system PCI device is a jumper-free device that can be configured automatically during the boot phase PCI Addressing each PCI peripheral is identified by a bus number, a device number,

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

queue, and non-blocking I/O is implemented by polling.One, blocking I/O implementation--waiting queue1. Basic conceptIn Linux drivers, you can use the wait queue (wait queues) to wake up a blocking process . Wait queue is very early as a basic functional unit in the Linux kernel, it is a queue-based data structure, and process scheduling mechanism tightly integr

atomic items that must be transmitted, and the direction of the transmission void Set_dma_mode (unsigned int channel, char mode); Mode Dma_mode_read Dma_mode_write Dma_mode_cascade Release control of the bus void set_dma_addr (unsigned int channel, unsigned int addr); void Set_dma_count (unsigned int channel, unsigne

, the kernel does not need to handle the concurrent access hardware, only one application instance will access the hardwarePossible user-space device driversUSB with Libusb, http://www.libusb.org/SPI with Spidev, Documentation/spi/spidevI²c with I2cdev, Documentation/i2c/dev-interfacememory-mapped devices with UIO, including interrupt handling, documentation/docbook/uio-howto/Some device drivers are implemented in user space, part of the kernel space

contiguous and the corresponding data block on disk is also adjacent, then the general block layer can be merged with them, this way to produce a larger memory area is the physical segment.Common block Layer:1. The common block layer is a kernel component that handles requests from all block devices in the systemI\O Scheduler:1. Block device drivers can transmit one sector at a time, but the block i\o layer does not do so because it is time-consuming

;}/* The distory function */Int cleanup_module (){Printk ("I will shut down myself in kernerl mod/n )";Retutn 0;} This example is complete. We also write a makefile example to make it suitable for our applications with heavy program. Here is the content of the makfile. # A makefile for a moduleCC = gccMODCFLAGS: =-Wall _ DMODULE-D_KERNEL _-DLinuxHello. o hello. c/usr/inculde? Linux/version. hCC $ (MODCFLAGS) 0c hello. cEcho the module

Linux Kernel "drivers/scsi/gdth. c" IOCTL Local Privilege Escalation Vulnerability Release date:Updated on: Affected Systems:Linux kernel 2.6.0-2.6.37Description:--------------------------------------------------------------------------------Bugtraq id: 44648Cve id: CVE-2010-4157 Linux Kernel is the Kernel used by open source

Path for Linux Device Driver engineers-basic principles and framework of network device drivers K-Style Reprinted please indicate from Hengyang Normal College 08 electric 2 K-Style http://blog.csdn.net/ayangke,QQ:843308498 mailbox: yangkeemail@qq.com 1. Linux network subsystem At the top of the Linux network subsystem

Differences between Linux 2.4 and kernel drivers-general Linux technology-Linux programming and kernel information. For more information, see the following. To thoroughly prevent incorrect operations on the kernel module being used, the Linux 2.4 kernel has been improved com