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Linux Device Driver Training

Linux Device Driver Development Course

Overall objective of this class is to teach attendees on how to develop device drivers for Linux.

This three day course provides substantial practice with the key steps in developing Linux device drivers. The course shows attendees how device drivers work with the Linux kernel, how to compile and load drivers, how to debug drivers, as well as other essential topics.

This course acquaints developers with the issues essential for Linux device driver development. The course progresses through a number of topics. Each topic is presented along with a supporting laboratory exercise before moving on to the next topic.

Attendees will spend approximately 50 percent of the class time actually gaining hands-on experience with these topics.


Course Objectives:

• To provide an understanding of the essentials of Linux device drivers.
• To give you practical experience in developing Linux device drivers.
• The steps necessary to add devices to a Linux system
• How to determine what hardware is present on a Linux system
• The purpose and functionality of device drivers
• Compiling and linking device drivers
• Trade-offs between loadable modules and drivers compiled into the kernel.


Who Should Attend:
The course is designed for software engineers who are new to Linux device drivers. Attendees should have experience with C, be able to perform basic Unix commands, and have some experience with the basic Gnu tools of gcc, gdb, and make.

Course Materials
The class materials for this course have been meticlously designed by leading practioners in this area. The workshop materials include a comprehensive student workbook and CD. The workbook contains all of the slides used in the course as well as hands-on lab exercises.  The CD contains the lab exercise code as well as a large amount of Linux software.

Course Workshop and Set-up:
The workshop makes use of standard PC’s with a desktop Linux distribution for development. The course will make use of PC's and PC devices as examples.

The following modules will be covered during the class:

Devices in Linux
Devices treated as files, the /dev directory
Device classes – character, block, network, pipe
Creating device files with mknod
User Space Driver APIs
Low-level API
Streams API
How Loadable Modules Work Benefits of loadable modules
Correct use of insmod, modprobe, rmmod, and lsmod
Passing parameters to a loadable module
The GPL and your driver code
Compiling, Loading And Exporting
Writing a simple module
Compiling modules
Loading/unloading modules
Exporting symbols from a loadable module
Creating stacked loadable modules
Character Devices Major and minor numbers
Registering character device file
Driver methods – the file operations table
Transferring data to/from User Space
Tracing and Debugging printk for debugging
Device information in /proc
strace to track system calls
ksyms and ksymoops
Debuggers – gdb and kgdb
Blocking and Wait Queues Multi-tasking
Schedule()
Wait Queues
Safe sleeping
Poll()
Accessing Hardware I/O ports vs. memory mapping
Allocating and mapping I/O space
Functions for reading and writing I/O ports
Barriers
Accessing I/O from User Space
Handling Interrupts Interrupt Handler functions
Restrictions of kernel code running in interrupt context
Deferred interrupt handling tasklets and workqueues
Accessing PCI hardware
detecting PCI devices
Resour
ce conflicts
Vendor
/device IDs
I/O mapping
USB Drivers USB structure and Topology
E
ndpoints, interfaces and configurations
USB Request Blocks(urbs)
Driver Structure and organization
"Gadget" drivers
Managing Time Timer interrupts and jiffies
Short Delays
Task queues
Kernel Timers
Block Device Drivers Block Device Drivers
Header files
Registering block drivers
The block_device_operations structure
Special Methods

Network Drivers

The net_device structure
Sockets
Naming scheme and registration
Network driver methods
NAPI the new API

Adding a Driver to the Kernel Tree

Where to put it - kernel layout for drivers
Modifying the Makefile

Adding it to configuration options - the Kconfig file


If you have any questions about the difficulty level of the class or any other aspect of the class, please contact us at: classes (at) linuxcertified.com

Optional: All attendees will get a Linux laptop to be used during the class. You have the option of purchasing this laptop with an additional course fee.

Enrollment Form

On-site: If you would like to arrange an on-site Linux Device Driver class, please contact us: classes (at) linuxcertified.com.

Public class schedule: Please see dates on our calendar page.

 

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