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Linux Device Driver,LDD,

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R
Rahul Batra

Linux device drivers provide an interface between hardware devices and user programs running in userspace. They present devices as files to user programs through the kernel's virtual file system interface. Device drivers are loaded kernel modules that communicate with hardware through interrupts and direct memory access. They implement read, write and other functions to transfer data between memory and devices.

Technologie
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Linux Device Drivers [email_address]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],What is a device driver?
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Device Driver
Kernel View
Kernel Components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Kernel Components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Kernel Components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Kernel Components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What are device drivers in Linux? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Linux Device Drivers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Kernel Modules Versus Applications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
User Space Versus Kernel Space ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
User program & Kernel interface
Block I/O on Linux
Device Driver Types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Device Driver Types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Device Driver Types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Block Versus Character devices
Loadable Kernel Module (LKM) ,[object Object],[object Object],[object Object]
Types of LKM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Basic LKM (program) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
LKM Utilities cmd ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Common LKM util cmd ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
General implementation steps ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Read/write (I/O) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Polling mode ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Interrupt mode ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Device Driver Process I/O Device read device wake up process suspend process issue interrupt and read data issue read command Interrupt mode
Interrupt mode
Device special file ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Register and unregister device ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Register and unregister device ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Implementation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
kernel functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
kernel functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Pitfalls ,[object Object],[object Object],[object Object]

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Linux Device Driver,LDD,