Re: iPAQ 214 Progress

Oliver Ford <oliford_at_oliford.co.uk> writes:

> I'm starting a new thread as the existing one is getting a bit long and confused.
>
> Just reporting progress.
>
> I am able to mount the root filesystem on the SD card with some simple kernel
> options and have also tried booting a familiar image (but with my kernel) which
> actually works. It loads X quite happily and gets as far as the touch screen
> calibration where I can't do anything. So the touch screen is my next
> project. I'm certain now that the touch screen is on the AC97 system (resetting
> it in winCE kills the sound and touchscreen and nothing else. Also, haret sees
> the ac97 wired gpios flipping when you press the screen). It appears to be a
> WM971x chip, most likely 9713, which there is a driver for, though it isn't
> currently in the mainline kernel. Unfortunately it seems that the kernel AC97
> driver for the PXA27x isn't quite right for the PXA310. There is something weird
> with the reset procedure to do with clocks in the 27x and the extra clock
> doesn't exist for the 310. I will pester the kernel list about this in a minute
> but will also continue to hack it about myself.

If you're right, you have the exact same setup as in the Mio Mitac A701. This
device has a wm9713 connected to the pxa270, and handles through the wm9713
sound, touchscreen and battery monitoring.

For the pxa270, the wm9713 reset was broken, perhaps you'll get more lucky.
If you wish, I kept my investigation on the mio here :
http://belgarath.falguerolles.org/download/mio_a701/docs/observations/sound
http://belgarath.falguerolles.org/download/mio_a701/docs/observations/battery/

and of course the documentation :
http://belgarath.falguerolles.org/download/mio_a701/docs/Documentation/Documentation/AudioTouchscreen

Hope this can help you a bit. I you get through the same experience as I did,
you'll have the most trouble to figure out the electrical connections between
sound elements (GSM lines, mics, ...) and wm9713 chip.

For the sound part, you can have a peek at my dev git :
http://belgarath.falguerolles.org/git/mioa701-dev.git, commit 85ad507495116efaaa43f519e5de5edee136b506, the sound/soc part.

My apologies to the haret team, this is fully out of topic. I won't continue on
that thread.

--
Robert