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How to Write a Linux USB Device Driver

Issue 90

From Issue #90
October 2001

Oct 01, 2001  By Greg Kroah-Hartman
 in
Greg shares his USB driver skeleton and shows how it can be customized for your specific device.
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Try to download Chapter 13: USB of Linux Device Drivers

Anonymous's picture
Submitted by Anonymous on Sun, 03/21/2010 - 10:07.

http://lwn.net/images/pdf/LDD3/ch13.pdf

Not Necessarily a Good Thing

Anonymous's picture
Submitted by Anonymous (not verified) on Mon, 08/24/2009 - 19:45.

"His free software is being used by more people than any closed-source projects he has ever been paid to develop."

No disrespect to Greg, but that's not necessarily a good tagline to go by. My first reading of that implied that his code is so bad he had to give it away...or that his closed-source projects were unusable.

Perhaps you should try "Greg's software is widely used in the open source community."

Sample code for linux usb device driver

Anonymous's picture
Submitted by Anonymous (not verified) on Tue, 03/31/2009 - 08:40.

Dear Sir,

I am a student of Computer Engineering, i am studying linux at present and need a linux code for my college code does any body has such code a sample test code for the pen drive....

Regards
Rahul

You can refer to Essential

Anonymous's picture
Submitted by Anonymous on Wed, 04/07/2010 - 14:44.

You can refer to Essential Linux Device Drivers writtennn by Sreekrishnan Venkateswaran. Its a very good book with lots of code examples.

http://www.amazon.com/Essential-Device-Drivers-Sreekrishnan-Venkateswara....

-- Alakesh

Using the devfs_fs_kernel.h

vishy@honeywell's picture
Submitted by vishy@honeywell (not verified) on Tue, 01/10/2006 - 07:01.

Hi,

I went thru a few comments on the devfs_fs_kernel.h . This header file is included by most of the FS c files .. so only if the CONFIG_DEVFS_FS is enabled(made y) will the method do something. Otherwise the method returns 0 or NULL based on the return type of the func. Thus if a device is to be registered using the DEVFS make sure that the CONFIG_DEVFS_FS is set which causes the right method to be called.

rgds
vishy

Re: Kernel Korner: How to Write a Linux USB Device Driver

Anonymous's picture
Submitted by Anonymous on Mon, 03/29/2004 - 03:00.

I found in kernel2.4.18,the devfs_register() is defined as:
static inline devfs_handle_t devfs_register (devfs_handle_t dir,
const char *name,
unsigned int flags,
unsigned int major,
unsigned int minor,
umode_t mode,
void *ops, void *info)
{
return NULL;
}

file is :devfs_fs_kernel.h
How can I finish register a device file?

Re: Kernel Korner: How to Write a Linux USB Device Driver

Anonymous's picture
Submitted by Anonymous on Sun, 09/01/2002 - 02:00.

good article.

How about "how to write a file system driver" for linux?

Re: Kernel Korner: How to Write a Linux USB Device Driver

Anonymous's picture
Submitted by Anonymous on Fri, 06/20/2003 - 02:00.

I found in kernel2.4.18,the devfs_register() is defined as:
static inline devfs_handle_t devfs_register (devfs_handle_t dir,
const char *name,
unsigned int flags,
unsigned int major,
unsigned int minor,
umode_t mode,
void *ops, void *info)
{
return NULL;
}

file is :devfs_fs_kernel.h
How can I finish register a device file?

Thanx

Sumanta Sathua's picture
Submitted by Sumanta Sathua (not verified) on Tue, 05/23/2006 - 23:59.

Thanx a lot to Greg Kroah-Hartman .Really this article helped me a lot to write a USB device driver.

Please Note, this article was

J.Flores's picture
Submitted by J.Flores (not verified) on Thu, 06/09/2005 - 13:20.

Please Note, this article was written on 2001, now (jun-2005) a lot of changes has been done on Linux kernel 2.6.x.... just keep it in mind.

Try to download Chapter 13: USB of Linux Device Drivers (3rd Ed.) at http://www.oreilly.com/catalog/linuxdrive3/

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