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Device Driver Tutorial |
1. Introduction to Device Drivers
Overview of the Template Driver Example
Writing the Loadable Module Configuration Entry Points
Declaring the Loadable Module Configuration Entry Points
Defining the Module Initialization Entry Point
Defining the Module Information Entry Point
Defining the Module Unload Entry Point
Including Loadable Module Configuration Header Files
Writing the Autoconfiguration Entry Points
Declaring the Autoconfiguration Entry Points
Defining the Device Attach Entry Point
Defining the Device Detach Entry Point
Defining the Get Driver Information Entry Point
Defining the Report Driver Property Information Entry Point
Including Autoconfiguration Header Files
Writing the User Context Entry Points
Declaring the User Context Entry Points
Defining the Open Device Entry Point
Defining the Close Device Entry Point
Defining the Read Device Entry Point
Defining the Write Device Entry Point
Including User Context Header Files
Writing the Driver Data Structures
Defining the Character and Block Operations Structure
Defining the Device Operations Structure
Defining the Module Linkage Structures
Including Data Structures Header Files
Writing the Device Configuration File
Building and Installing the Template Driver
Reading and Writing the Device
Complete Template Driver Source
3. Reading and Writing Data in Kernel Memory
This chapter shows you how to develop a very simple, working driver. This chapter explains how to write the driver and configuration file, compile the driver, load the driver, and test the driver.
The driver that is shown in this chapter is a pseudo device driver that merely writes a message to a system log every time an entry point is entered. This driver demonstrates the minimum functionality that any character driver must implement. You can use this driver as a template for building a complex driver.
This chapter discusses the following driver development steps:
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