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[Linuxwacom-devel] painless multiple tablets, end of hid_blacklist'ing ... film at 11
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From: Ron <ro...@de...> - 2006-04-17 13:24:50
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Hi,
Yes, I'm a little excited, and its always nice to finish on a high
note. This time I think I have little but unadulterated Good News.
As long ago promised, I've taken another look at the dreaded device
node allocation and blacklisting trouble. Things seems to have settled
down a little, or at least become sufficiently functional, to make the
answer delightfully simple, if not somewhat occulted before tonight.
Attached is a set of udev rules, which will create a /dev/input/wacom
link to the last attached tablet. This node is suitable for the most
usual case, where a user has only a single wacom device attached to
their machine.
It will also create a /dev/input/<TabletType> node, pointing to the
last attached device of that type (in my case graphire3). For users
with multiple devices of different types, you may use the name of each
tablet without ever needing to worry about where or what order you
connect them in.
For the case where a user has multiple tablets of the same type, things
get just a little harder. There does not seem to be any serial number
or similar which we could use to discriminate between them (if there is,
making it available may prove useful) -- but this case at present is
best handled by rules already present in the default Debian installation,
which create /dev/input/by-path/... links. It requires the most user
intervention still, and that you identify each tablet by its connection
point. Without a unique id for similar tablets, I'm not sure we can do
much better than that. I can forward those rules to anyone not using
Debian who needs them, as I haven't duplicated them in the wacom
specific code.
In addition, the rules call a RUN script when any wacom device is
attached, which will check if the device has bound to the wacom
kernel driver, and if it has not, will try to remedy that.
If they don't change it all again, this should work for every tablet
with every kernel from 2.6.16 or so on, and we can delist all the
devices from the hid_blacklist and be down to just the bleeding edge
wacom.c outside of the kernel.
It's half tested at present, meaning I don't have a kernel handy which
_doesn't_ blacklist my graphire3 from hid-core, but I can manually
disconnect and reconnect it to the wacom driver, so disconnecting from
any other module should not be a source of too much grief.
XOrg7 should be usable in Debian in a few days, and I'll try to have
this available for wider testing right after that.
In the meantime, I would invite anyone with an interest (especially
maintainers from other dists) to consider the names of the links
for each device type presented below. It would be really nice if we
could all agree to use the same names for them, and coordinate the
addition of new ones as the devices become available/supported so
that they stay that way.
So with no further ado, Ladies and Gentlemen,
I give you the missing links (:
# udev rules for wacom tablets.
# These rules were compiled for the Debian GNU/Linux distribution,
# but others may, and indeed are encouraged to, use them also.
#
# Should you do so, PLEASE CO-ORDINATE ANY CHANGES OR ADDITIONS
# of new devices with ro...@de..., so that we can try to
# present users with with a standard set of device nodes which
# they can rely on across the board.
# Convenience link for the common case of a single tablet.
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYMLINK="input/wacom"
# Type-named links for multiple tablets. If you want to use multiple
# tablets of the _same_ type, you will probably need to use the links
# from /dev/input/by-path to identify which is plugged into what usb
# port. For different types though, just pick your links from the
# list below.
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0000", SYMLINK+="input/penpartner"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0010", SYMLINK+="input/graphire"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0011", SYMLINK+="input/graphire2-4x5"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0012", SYMLINK+="input/graphire2-5x7"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0013", SYMLINK+="input/graphire3"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0014", SYMLINK+="input/graphire3-6x8"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0015", SYMLINK+="input/graphire4-4x5"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0016", SYMLINK+="input/graphire4-6x8"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0060", SYMLINK+="input/volito"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0061", SYMLINK+="input/penstation2"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0062", SYMLINK+="input/volito2-4x5"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0063", SYMLINK+="input/volito2-2x3"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0064", SYMLINK+="input/penpartner2"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0020", SYMLINK+="input/intuos-4x5"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0021", SYMLINK+="input/intuos-6x8"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0022", SYMLINK+="input/intuos-9x12"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0023", SYMLINK+="input/intuos-12x12"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0024", SYMLINK+="input/intuos-12x18"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0030", SYMLINK+="input/pl400"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0031", SYMLINK+="input/pl500"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0032", SYMLINK+="input/pl600"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0033", SYMLINK+="input/pl600sx"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0034", SYMLINK+="input/pl550"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0035", SYMLINK+="input/pl800"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0037", SYMLINK+="input/pl700"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0038", SYMLINK+="input/pl510"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0039", SYMLINK+="input/dtu710"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="00C0", SYMLINK+="input/dtf521"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="00C3", SYMLINK+="input/dtf720"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0003", SYMLINK+="input/cintiq_partner"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0041", SYMLINK+="input/intuos2-4x5"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0042", SYMLINK+="input/intuos2-6x8"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0043", SYMLINK+="input/intuos2-9x12"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0044", SYMLINK+="input/intuos2-12x12"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0045", SYMLINK+="input/intuos2-12x18"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="00B0", SYMLINK+="input/intuos3-4x5"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="00B1", SYMLINK+="input/intuos3-6x8"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="00B2", SYMLINK+="input/intuos3-9x12"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="00B3", SYMLINK+="input/intuos3-12x12"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="00B4", SYMLINK+="input/intuos3-12x19"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="00B5", SYMLINK+="input/intuos3-6x11"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="003F", SYMLINK+="input/cintiq21ux"
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0047", SYMLINK+="input/intuos2-6x8a"
# Check and repossess the device if a module other than the wacom one
# is already bound to it.
KERNEL=="event[0-9]*", SYSFS{idVendor}=="056a", ACTION=="add", RUN+="/sbin/check_driver wacom $devpath $env{ID_BUS}"
--------------------------------------------------------------------
#!/bin/sh
#
wanted=$1
devpath=$2
bustype=$3
device=$(basename $(readlink /sys/$devpath/device))
driver=$(basename $(readlink /sys/$devpath/device/driver))
if [ x"$driver" != x"$wanted" ]; then
#echo -n "$device" > /sys/$devpath/device/driver/unbind
#echo -n "$device" > /sys/bus/$bustype/drivers/$wanted/bind
fi
====================================================================
best,
Ron
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