1. Introduction to Linux device driver
潘仁義

2. The role of device driver
Flexible
Mechanism? Policy?
只提供存取硬體的能力，而不加諸任何限制
介於『應用程式』與『硬體裝置』的軟體層
功能性? 簡潔性?

3. Splitting the Kernel

4. Classes of devices and modules
Character device
Can be accessed as a stream of bytes
open, close, read, write
/dev/console
Block device
Can host a filesystem and transfer any number of bytes at a time
mount a filesystem
Network interface
Can exchange data with other hosts
packet transmission

5. Kernel compile and installation
Version above
Kernel source
Make kernel
cd /usr/src/linux
make clean
make menuconfig
make dep; make bzImage
make modules; make modules_install
cp arch/i386/boot/bzImage /boot/vmlinuz
cp .config /boot/config
cp System.map /boot/System.map
lilo; reboot; dmesg

6. /usr/src/linux directory
kernel/
除了fs, mm, networking外的核心碼
fs/
File system
mm/
Memory management
net/
Socket library, Protocol stack
ipc/ and lib/
Include/ and arch/
driver/
driver/char, driver/block, driver/net

7. Linux booting process A Guided Tour of a Linux Boot
The Linux Boot Process
The Linux Kernel HOWTO

8. Demo example Source Make Run
Make
cd ~/ldd2/misc-modules/
make clean; make
Oops?
cd /usr/include/
mv linux linux.orig
ln –s /usr/src/linux/include/linux/ linux
mv asm asm.orig
ln –s /usr/src/linux/include/linux/acm/ asm
Oops? Again
make export.ver
#include<slab.h>
Run
tail –f /var/log/messages
insmod ./hello.o
MODULE_LICENSE(“GPL”)

9. 作業 裝一台linux, compile kernel, boot 裝上demo code, 執行 eCos eCos home
eCosCentric
WebCast: A License-Free Alternative RTOS for the G4 PowerPC