... definition:
Chapter 8 :Hardware Management
Although playing with scull and similar toys is a good introduction to the
software interface of a Linux device driver, implementing a real device
requires ... addresses are
either burned in device logic circuits, statically assigned in local device
memory, or set by means of physical jumpers. The latter is true of PCI
device...
... 1 :An Introduction to Device Drivers
As the popularity of the Linux system continues to grow, the interest in
writing Linux device drivers steadily increases. Most of Linux is
independent ... because more and more functionality in
Linux is being modularized.
Classes of Devices and Modules
The Unix way of looking at devices distinguishes between three device
types. Each mod...
... of setting up the devices.
for (i=0; i < scull_nr_devs; i++) {
scull_devices[i].quantum = scull_quantum;
scull_devices[i].qset = scull_qset;
sema_init(&scull_devices[i].sem, 1); ... Allocation of Major Numbers
Some major device numbers are statically assigned to the most common
devices. A list of those devices can be found in Documentation/devices.txt
within the kernel s...
... implementing device control this way is that the user can control
the device just by writing data, without needing to use (or sometimes write)
programs built just for configuring the device.
For ... on the
device, but some other operations should be denied. For example, not all
users of a tape drive should be able to set its default block size, and the
ability to work with a disk...