Hi,
in order to have the driver up and running, two modifications are
necessary in the hid subsystem:
1. the one described below, in hid.h. This is required for a whole
bunch of multitouch devices but obviously it has to be done only once.
2. the addition of the device's (VendorID, ProductID) couple to a
black list in the hid subsystem's core, so that the new driver can
manage it. This involves changes in hid-ids.h and hid-core.c, for
every new driver.
If hid is compiled as a module, this is fairly straightfowrad. If, as
in Ubuntu, it is statically compiled in the kernel, it means that one
needs to recompile the kernel each time they add a new multitouch
driver.
I was hoping that at least the first patch would be taken into
account for 2.6.33 so as to save work for a lot of people, but it
looks like the patch came too late in the process.
Cheers,
St.
Le 4 mars 10 à 10:23, Luis R. Rodriguez a écrit :
Adding Chatty @ ENAC, in hopes some more light can be shed on this.
On Thu, Mar 4, 2010 at 1:20 AM, Luis R. Rodriguez
<mcgrof@xxxxxxxxx> wrote:
On Thu, Mar 4, 2010 at 12:18 AM, Amit Kucheria
<amit.kucheria@xxxxxxxxxxxxx> wrote:
Hi Thomas,
I'm forwarding this to the kernel-team mailing list so other
developers can
also comment.
Regards,
Amit
----- Forwarded message from Thomas Winteler <info@xxxxxxxxxxx>
-----
Date: Wed, 03 Mar 2010 09:26:56 +0100
From: Thomas Winteler <info@xxxxxxxxxxx>
To: amit.kucheria@xxxxxxxxxx
Subject: Upcoming Kernel - MultiTouchScreen Support
User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:
1.9.1.8) Gecko/20100216 Thunderbird/3.0.2
Organization: Win-Soft, Business IT eXpert
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Good Morning Mr. Amit Kucheria
Thank you for your time, reading my eMail.
The new Hardware on the market offer MultiTouchScreens, like the
Netbook
from ASUS:
ASUS EEE PC T91MT
http://www.asus.com/product.aspx?P_ID=KIqtSJ1aVsmVpeqS
I found some information in ASUS's Support Forum and found also a
Linux
Driver Builder.
http://vip.asus.com/forum/view.aspx?
id=20091214162901203&SLanguage=en-us&page=2&board_id=20&model=Eee%
20PC%20T91MT
ENAC Interactive computing laboratory HowTo
http://lii-enac.fr/en/projects/shareit/linux-howto.html
Drivers from ENAC
http://lii-enac.fr/en/projects/shareit/linux.html
MosArt MT Driver for ASUS's T91MT
http://lii-enac.fr/en/projects/shareit/multitouch-devices.html
- --> MosArt
The Problem on this thing is, that the Kernel needs to be patched
and
recompiled to get it running.
The kernel changes don't seem that bad, I only see mention to one
header file which needs to be changed as follows:
diff --git a/include/linux/hid.h b/include/linux/hid.h
index b1344ec..5ad8e6e 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -663,7 +663,7 @@ struct hid_ll_driver {
/* Applications from HID Usage Tables 4/8/99 Version 1.1 */
/* We ignore a few input applications that are not widely used */
-#define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <=
0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >=
0x000d0002) && (a <= 0x000d000
+#define IS_INPUT_APPLICATION(a) (a >= 0xd0002 && a <= 0xd0006)
/* HID core API */
But this the change required is not documented, why is this required?
Anyway apart from it seems you need to modify the hid module and
provide it as a replacement. The rest is just adding drivers, and
that
should be relatively trivial.
What would be better is to track what is not upstream, see if the
authors are working on that, and if not see if the driver project can
get it upstream at least through staging.
Luis
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