LDT - Linux Driver Template

Hi

I develop template of Linux driver. It can be used as sample for Linux
driver development beginners and starting point for development of new
drivers.

The driver uses following Linux facilities: module, platform driver,
file operations (read/write, mmap, ioctl, blocking and non-blocking
mode, polling), kfifo, completion, interrupt, tasklet, work, kthread,
timer, misc device, proc fs, UART 0x3f8, HW loopback, SW loopback

Readme and sources: https://github.com/makelinux/ldt/blob/master/README.md

To run driver with test script just run:
 git clone git://github.com/makelinux/ldt.git && cd ldt && ./ldt-test

You feedback, suggestions, discussions, recommendations patched will
be greatly appreciated!

Thanks

-- 
Constantine Shulyupin
http://www.MakeLinux.com/
Embedded Linux Systems,
Device Drivers, TI DaVinci

On Wed, Sep 26, 2012 at 6:03 PM, Constantine Shulyupin
[off-list ref] wrote:

Readme and sources: https://github.com/makelinux/ldt/blob/master/README.md

To run driver with test script just run:
 git clone git://github.com/makelinux/ldt.git && cd ldt && ./ldt-test

You feedback, suggestions, discussions, recommendations patched will
be greatly appreciated!

Hi,

I am the same person you probably see in LinkedIn :)

Anyway, I use kernel 3.2.0-31-generic (Linux Mint 13) and when I run
'sudo ldt-test', I got:
stty: /dev/ttyS0: Input/output error
dio.c:138 io_start FAIL errno = 5 "Input/output error" -1 = ret =
output(dev, inbuf, data_in_len)
No loopback on /dev/ttyS0 detected, running ldt driver with UART in
loopback mode
dio.c:138 io_start FAIL errno = 5 "Input/output error" -1 = ret =
output(dev, inbuf, data_in_len)

is it due to I have no serial port?

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

On Wed, 26 Sep 2012, Mulyadi Santosa wrote:

On Wed, Sep 26, 2012 at 6:03 PM, Constantine Shulyupin
[off-list ref] wrote:

quoted

Readme and sources: https://github.com/makelinux/ldt/blob/master/README.md

To run driver with test script just run:
 git clone git://github.com/makelinux/ldt.git && cd ldt && ./ldt-test

You feedback, suggestions, discussions, recommendations patched will
be greatly appreciated!

Hi,

I am the same person you probably see in LinkedIn :)

Anyway, I use kernel 3.2.0-31-generic (Linux Mint 13) and when I run
'sudo ldt-test', I got:
stty: /dev/ttyS0: Input/output error
dio.c:138 io_start FAIL errno = 5 "Input/output error" -1 = ret =
output(dev, inbuf, data_in_len)
No loopback on /dev/ttyS0 detected, running ldt driver with UART in
loopback mode
dio.c:138 io_start FAIL errno = 5 "Input/output error" -1 = ret =
output(dev, inbuf, data_in_len)

is it due to I have no serial port?

  i get the same error on ubuntu 12.04, and it's pretty clearly
because my laptop has no actual serial port (something becoming more
and more common these days).  i think you have to modify your examples
to consider that possibility.

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================

Yes, it is because you have no serial port. In this case LDT emulates loopback.

On Wed, Sep 26, 2012 at 4:48 PM, Mulyadi Santosa
[off-list ref] wrote:

On Wed, Sep 26, 2012 at 6:03 PM, Constantine Shulyupin
[off-list ref] wrote:

quoted

Readme and sources: https://github.com/makelinux/ldt/blob/master/README.md

To run driver with test script just run:
 git clone git://github.com/makelinux/ldt.git && cd ldt && ./ldt-test

You feedback, suggestions, discussions, recommendations patched will
be greatly appreciated!

Hi,

I am the same person you probably see in LinkedIn :)

Anyway, I use kernel 3.2.0-31-generic (Linux Mint 13) and when I run
'sudo ldt-test', I got:
stty: /dev/ttyS0: Input/output error
dio.c:138 io_start FAIL errno = 5 "Input/output error" -1 = ret =
output(dev, inbuf, data_in_len)
No loopback on /dev/ttyS0 detected, running ldt driver with UART in
loopback mode
dio.c:138 io_start FAIL errno = 5 "Input/output error" -1 = ret =
output(dev, inbuf, data_in_len)

is it due to I have no serial port?

--
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

-- 
Constantine Shulyupin
http://www.MakeLinux.com/
Embedded Linux Systems,
Device Drivers, TI DaVinci

I've made test script less noise. Please update sources. The driver
and the the test works with UART too.

On Wed, Sep 26, 2012 at 5:04 PM, Robert P. J. Day [off-list ref] wrote:

On Wed, 26 Sep 2012, Mulyadi Santosa wrote:

quoted

On Wed, Sep 26, 2012 at 6:03 PM, Constantine Shulyupin
[off-list ref] wrote:

quoted

Readme and sources: https://github.com/makelinux/ldt/blob/master/README.md

To run driver with test script just run:
 git clone git://github.com/makelinux/ldt.git && cd ldt && ./ldt-test

You feedback, suggestions, discussions, recommendations patched will
be greatly appreciated!

Hi,

I am the same person you probably see in LinkedIn :)

Anyway, I use kernel 3.2.0-31-generic (Linux Mint 13) and when I run
'sudo ldt-test', I got:
stty: /dev/ttyS0: Input/output error
dio.c:138 io_start FAIL errno = 5 "Input/output error" -1 = ret =
output(dev, inbuf, data_in_len)
No loopback on /dev/ttyS0 detected, running ldt driver with UART in
loopback mode
dio.c:138 io_start FAIL errno = 5 "Input/output error" -1 = ret =
output(dev, inbuf, data_in_len)

is it due to I have no serial port?

  i get the same error on ubuntu 12.04, and it's pretty clearly
because my laptop has no actual serial port (something becoming more
and more common these days).  i think you have to modify your examples
to consider that possibility.

rday

--

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================

-- 
Constantine Shulyupin
http://www.MakeLinux.com/
Embedded Linux Systems,
Device Drivers, TI DaVinci

On Wed, Sep 26, 2012 at 10:21 PM, Constantine Shulyupin
[off-list ref] wrote:

I've made test script less noise. Please update sources. The driver
and the the test works with UART too.

Hi...

yup, less noise:
sudo ./ldt-test

stty: /dev/ttyS0: Input/output error
No loopback on /dev/ttyS0 detected, running ldt driver with UART in
loopback mode
LDT nonblocking read/write test passed
LDT blocking read/write test passed
LDT mmap test passed
LDT ioctl test passed
trace_stat.log saved
ftrace.log saved
kernel.log saved

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

  you might extend the "clean:" target to *really* clean the generated
artifacts in that directory.  or perhaps introduce "distclean:".

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================