Date:	Thu, 17 Sep 2009 14:52:29 +0200
From:	Bart Hartgers <bart.hartgers@...il.com>
To:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	gregkh@...e.de
Cc:	Ondrej Zary <linux@...nbow-software.org>,
	ark3116_driver@...tionant.de
Subject: New ark3116 driver - how to get included into kernel?

(Sorry for sending an HTML-ized version of this mail before)

Hi All,

I managed to write an improved ark3116 driver after I figured out that
it is just an 16450 UART with some USB glue logic.

The attached files can be compiled outside the kernel tree, and work
for 2.6.31. However, I would like this driver to (eventually) end up
in the kernel tree. In order to get there, who should I sent patches
against what? I've contributed code to the kernel before, but not in
the last 5 or so years, so I am a bit out of touch.

Compared to the old ark3116 driver this one offers the following improvements:
 - cts/rts handshake support
 - break signalling
 - line error detection

Since it is a big step from the previous driver, it made little sense
to modify that one, so I created new driver, named ark316new. Also
this means that both could coexist if the new one doesn't work for
someone.

This driver also includes support for an ark3116-based IrDA dongle,
tested by Ondrej Zary.

Thanks in advance for any input/help.

Groeten,
Bart

>>
>> I also tried to include the IrDA fixes for the old ark3116.c driver
>> that were posted on this list recently, but I could not test if
>> these work, since I don't have the proper hardware.

2009/8/31 Bart Hartgers <bart.hartgers@...il.com>
>
> 2009/8/29 Ondrej Zary <linux@...nbow-software.org>:
> > On Sunday 23 August 2009 14:46:16 Bart Hartgers wrote:
> >> Hi All,
> >>
> >> I managed to write an improved ark3116 driver after I figured out that
> >> it is just an 16450 UART with some USB glue logic.
> >>
> >> Compared to the old ark3116 driver it offers the following improvements:
> >> - cts/rts handshake support
> >> - break signalling
> >> - line error detection
> >>
> >> Since it is a big step from the previous driver, it made little sense
> >> to modify that one, so I created new driver, named ark316new. Also
> >> this means that both could coexist if the new one doesn't work for
> >> someone.
> >>
> >> I have no datasheet, so the driver is entirely based on reverse
> >> engineering, and some testing by others would be a good idea.
> >>
> >> I also tried to include the IrDA fixes for the old ark3116.c driver
> >> that were posted on this list recently, but I could not test if
> >> these work, since I don't have the proper hardware.
> >>
> >> Because of this, I would appreciate reports of both success and
> >> failure in using this driver.
> >
> > Tested the driver today with that Gembird UIR-22.
> >
> > It did not compile neither in 2.6.30.1 nor in 2.6.31-rc8 with the following
> > error:
> >
> > ark3116new.c:790: error: unknown field shutdown specified in initializer
> > ark3116new/ark3116new.c:790: warning: initialization from incompatible pointer
> > type
> >
> > Commenting that line produced a module that worked:
> > usb 1-1: new full speed USB device using uhci_hcd and address 2
> > usb 1-1: configuration #0 chosen from 1 choice
> > usb 1-1: config 0 descriptor??
> > usbcore: registered new interface driver usbserial
> > usbserial: USB Serial Driver core
> > USB Serial support registered for ARK3116 RS232/IrDA
> > ark3116new 1-1:0.0: ARK3116 RS232/IrDA converter detected
> > usb 1-1: ark3116new using IrDA mode
> > usb 1-1: ARK3116 RS232/IrDA converter now attached to ttyUSB0
> > usbcore: registered new interface driver ark3116new
> > ark3116new:v0.1:USB ARK3116 serial/IrDA driver
> > usb 1-1: ark3116new don't know how to do software flow control
> > NET: Registered protocol family 23
> >
> > Ran "irattach /dev/ttyUSB0 -s" and then "obexftp -i -l" to list files on Nokia
> > 6230i. It worked fine and file transfer too. So the IrDA mode works.
> >
> > When I unplugged the device, irattach remained running and some error message
> > was written to console every few seconds (sorry, I haven't recorded it).
> > Killing irattach then resulted in oops. But this might be expected as the
> > shutdown function was commented out.
> >
> Hi Ondrej,
>
> Thanks for testing this!
>
> I later discovered that there is a change with respect to
> shutdown-functionality between 2.6.28 (on which I made the driver) and
> 2.6.31. I have to update the driver to 2.6.current anyway.
>
> > I think that this driver should replace current ark3116 driver. Having two
> > drivers for the same hardware is a bad thing.
>
> I agree. However, given the experimental nature of the driver, I would
> prefer some more testing. Then again, the original driver is lacks
> some features, and making ark3116new default would increase its
> exposure ;-).
>
> Groeten,
> Bart
>
> >
> > --
> > Ondrej Zary
> >
>
>
>
> --
> Bart Hartgers - New e-mail: bart.hartgers@...il.com



--
Bart Hartgers - New e-mail: bart.hartgers@...il.com



--
Bart Hartgers - New e-mail: bart.hartgers@...il.com

View attachment "Makefile.txt" of type "text/plain" (493 bytes)

View attachment "ark3116new.c" of type "text/x-csrc" (24998 bytes)

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