Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Linux Device Drivers Development
  • Toc
  • feedback
Linux Device Drivers Development

Linux Device Drivers Development

By : John Madieu
4 (30)
close
Linux Device Drivers Development

Linux Device Drivers Development

4 (30)
By: John Madieu

Overview of this book

Linux kernel is a complex, portable, modular and widely used piece of software, running on around 80% of servers and embedded systems in more than half of devices throughout the World. Device drivers play a critical role in how well a Linux system performs. As Linux has turned out to be one of the most popular operating systems used, the interest in developing proprietary device drivers is also increasing steadily. This book will initially help you understand the basics of drivers as well as prepare for the long journey through the Linux Kernel. This book then covers drivers development based on various Linux subsystems such as memory management, PWM, RTC, IIO, IRQ management, and so on. The book also offers a practical approach on direct memory access and network device drivers. By the end of this book, you will be comfortable with the concept of device driver development and will be in a position to write any device driver from scratch using the latest kernel version (v4.13 at the time of writing this book).
Table of Contents (23 chapters)
close
Free Chapter
1
Introduction to Kernel Development

Character Device Drivers

Character devices transfer data to or from a user application by means of characters, in a stream manner (one character after another), like a serial port does. A character device driver exposes the properties and functionalities of a device by means of a special file in the /dev directory, which you can use to exchange data between the device and user application, and also allows you to control the real physical device. This is the basic concept of Linux that says everything is a file. A character device driver represents the most basic device driver in the kernel source. Character devices are represented in the kernel as instances of struct cdev, defined in include/linux/cdev.h:

struct cdev { 
    struct kobject kobj; 
    struct module *owner; 
    const struct file_operations *ops; 
    struct list_head list; 
    dev_t dev; 
    unsigned int count...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech
bookmark search playlist download font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete