USB Host driver

[ttsenthil]

Hi ,
I want to write a USB host side driver.
To start with I want to know the flow of what an USB Host will do when
it detects a device?

Also I want to know whether I can use the usb_skeleton.c as my base code to develop usb host driver!!!

Looking for all your help

T.Senthil

[vijay_kernel]

Hi,

Yes it would be a good start, if you start writing USB driver with usb skeleton.c.

It also depends for which USB device you are writing a driver.

please go through the below link it may help you,

How to Write a Linux USB Device Driver | Linux Journal

Writing a Simple USB Driver | Linux Journal

Usb Device Drivers

Programming Guide for Linux USB Device Drivers

And go through the book Linux device drivers by Corbet and Rubini.

[ttsenthil]

Hello
Thanks for ur reply.

Well I compiled usb-skeleton.c and usb-skeleton.ko got created.

But when i give insmod and rmrmod it gives the below error

insmod usb-skeleton.ko
insmod: error inserting 'usb-skeleton.ko': -1 File exists
rmmod usb-skeleton
ERROR: Removing 'usb_skeleton': Device or resource busy

Looking for help to remove this error.

[vijay_kernel]

Hi Senthil,

Can you pelase paste your code here, so that it will be very easy for me to fix it.