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Writing drivers with hot-plug and power management support  
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ac6 >> ac6-training >> Operating Systems >> Linux >> Linux USB Drivers, HotPlug and Power Management Download Catalog Download as PDF Write us Printable version

D7 Linux USB Drivers, HotPlug and Power Management

Writing drivers with hot-plug and power management support

Writing drivers with hot-plug and power management support
formateur
Objectives
  • Configure the Linux kernel for optimal hotplug and power management.
  • Understand the specifics of the Linux kernel in the management of devices and drivers.
  • Understand how are generated hotplug events and how to use them in writing its drivers.
  • Understand how Linux manages the power-management
    • To write drivers integrated in this scheme
    • To optimize low power modes
  • Install and use hotplug and power-management utilities: udev, libusb, etc ...
  • Explore the wealth of Linux drivers for USB host and OTG gagdet.
  • Know the changes in the latest Linux kernels (2.6.30 and beyond).
  • Master the techniques of kernel debugging with Lauterbach JTAG probes.
Labs are conducted on target boards, that can be:
    Atmel ARM9-based boards, with Lauterbach JTAG probes.
We use the last linux kernel, as delivered on www.kernel.org.

Labs are conducted using the System Workbench for Linux - Basic Edition IDE.
Course environment
  • A PC workstation and a target board per two trainees group with Lauterbach JTAG probe.
  • Printed course material.
  • CDROM with documentation and exercises solutions.
Prerequisite
  • Good practice of C programming on Linux
  • Basic knowledge of Linux kernel and driver programming (see our D3 - Linux Drivers course)
First day
Reminders on kernel programming
  • Reminders on kernel module development
  • Kernel objects
Exercise:  Writing a kernel module creating and using kernel objects and sets
  • The sysfs file system
Exercise:  Interacting with a kernel module through a kernel object and the sysfs file sytem
Hotplug
  • Hotplug in the kernel
    • uevents
Exercise:  Writing a kernel module sending hotplug events to a user mode program.
  • Hotplug at user level
    • Udev
    • Hal and Dbus
Exercise:  Cross-compiling, configuring and using Udev.
Second Day
Devices and Drivers
  • The Device/Driver model in Linux
    • Device class and types
    • Bus drivers
  • Bus types
    • Generic devices and drivers
    • System devices and drivers
    • Platform devices and drivers
Exercise:  Writing a platform device driver showing how device matching work
Power-management : APM and ACPI
  • The APM standard.
  • The ACPI standard.
Exercise:  Writing a user program to shut down the system.
Power-management, suspend and hibernate
  • Power management in drivers
  • Freezing tasks
  • Suspend in RAM
  • Suspend on Disk
    • Hibernate
  • Debugging power management
Exercise:  Writing a kernel module reacting to suspend in RAM and system wakeup
Third Day
Cpu frequency governors
  • The cpufreq user interface.
  • The various governors available.
Idle Cpu governors
  • The Idle task.
  • The Idle device concept.
  • CpuIdle governors.
USB Drivers
  • The USB bus
    • USB devices
    • USB descriptors
    • USB endpoints
    • USB requests
  • User view of the USB bus and devices
  • USB device drivers
    • Hotplug
    • Communicating with devices through URBs
Exercise:  Writing a basic usb device driver using URBs
Exercise:  Writing an usb device driver using synchronous request management
Fourth Day
The libUSB user-mode USB driver framework
  • The libUSB libraries.
    • libUSB 0.1.12.
    • libUSB 1.0
Exercise:  Building libUSB
Exercise:  Writing a user-mode USB driver using libUSB
USB gadget drivers
  • Basic USB gadgets.
  • Composite USB gaddget drivers.
Exercise:  Writing a gadget driver and the corresponding host driver on the Linux workstation.
  • The USB On-The-Go (OTG) specification.
    • OTG support in Linux
 
Duration Cost Calendar
4 days 2380 € HT Session calendar
This course, designed for face-to-face delivery, can be provided either in our Paris training center or, worldwide, on your premises.
Scheduled classes are confirmed as soon as there is a confirmed booking.
To book a training session or for more information, please contact us on info@ac6-training.com.
Registrations are accepted till one week before the start date for scheduled classes.
For late registrations, please consult us.
You can also fill and send us the Adobe PDF format file registration form
 

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Last site update: Fri Jan 21 12:52:27 2022