Linux Device Drivers - Communicating with Hardware

What you will learn in this course:

• Two modes of communication with hardware - IO Mapped IO and Memory Mapped IO

• Kernel Drivers/Modules for IO Mapped IO - Speaker, RTC, Keyboard

• Kernel Drivers/Modules for Memory Mapped IO - Hardware Random Generator, GPIO, UART

• Accessing IO Mapped IO and Memory Mapped IO from user space

• PCI and SMBIOS

API's/Macros/Structures

• inb, outb, inw, outw, inl, outl

• inb_p, outb_p, inw_p, outw_p, inl_p, outl_p

• struct resource, request_region, release_region

• ioperm, iopl, geteuid

• request_mem_region, release_mem_region, ioremap, iounmap, ioread8, ioread16, ioread32, iowrite8, iowrite16, iowrite32

• ioport_map, ioport_unmap,mmap

Files:

/dev/port, /dev/mem, /proc/iomem, /proc/ioports

Commands

• hwclock

• date

• showkey

• hexdump

• strings

• dd

• lspci

• biosdecode

• dmidecode