Re: [Linux-usb-users] configuring usb hid to disable usbkbd for a device

[Andrew Hodgson]

Randy.Dunlap wrote:
On Mon, 02 May 2005 10:23:22 +1000 Andrew Hodgson wrote:
| Randy.Dunlap wrote:
| 
| >On Sat, 30 Apr 2005 18:08:56 +1000 Andrew Hodgson wrote:
| >
| >| I am new to configuring usb devices under linux.
| >| 
| >| I have searched the docs but have not found out how to do it.
| >
| >Did you read any of the kernel config help text?
| >  
| >
| Yes, I am actually an experienced linux/unix sysadmin/kernel programmer.

That's good, but not necessarily related to the question.  :)
| I just didnt want to go to that level if there was something simple I 
| was missing.
| 
| >
| >| Here is my problem.
| >| 
| >| I have a working usb IR remote control.
| >| 
| >| When I plug it in, it is found by my 2.6.9 setup without any problems.
| >| 
| >| -----------
| >| drivers/usb/core/usb.c: registered new driver hiddev
| >| input: USB HID v1.10 Keyboard [Twinhan Tech Remote Control] on usb-0000:00:07.2-2
| >| input: USB HID v1.10 Mouse [Twinhan Tech Remote Control] on usb-0000:00:07.2-2
| >| drivers/usb/core/usb.c: registered new driver hid
| >| -----------
| >| 
| >| I can then see the button presses through
| >| 
| >| 	/dev/input/event2
| >| 	/dev/input/mice
| >|     and
| >|     	as key presses (both in X and in the consoles)
| >| 
| >| I only want to see them through /dev/input/event2 as I want to use it with
| >| lirc and dont want to get keyboard input to all my terminals.
| >| 
| >| Does anyone know how to configure hid not to attach the usbkbd and usbmouse
| >| drivers for a particular device. I dont want to disable them globally as I
| >| also have a usb mouse and keyboard
| >
| >The HID driver supports USB mice and keyboards, so you shouldn't even
| >be using or loading usbkbd and/or usbmouse unless you are SURE you
| >know what you are doing and why.  Kconfig help text for usbkbd,
| >usbmouse is similar:
| >
| >	  Say Y here only if you are absolutely sure that you don't want
| >	  to use the generic HID driver for your USB keyboard and prefer
| >	  to use the keyboard in its limited Boot Protocol mode instead.
| >
| >	  This is almost certainly not what you want.  This is mostly
| >	  useful for embedded applications or simple keyboards.
| >
| >So you need either to disable usbkbd and usbmouse in your kernel
| >config/build, or (if they are loadable modules) prevent them from
| >being loaded, either by modifying /etc/modprobe.conf or by removing
| >or renaming them in /lib/modules/2.6.9/kernel/drivers/usb/input/ .
| >  
| >
| Sorry, I was not clear. The usbkbd & usbmouse kernel modules are NOT 
| loaded however the usb HID layer is installing something equivilent.
| 
| If I run usbmodules on the device I get
| 
| # usbmodules --device /proc/bus/usb/001/002
| usbhid
| usbkbd
| usbmouse

Let's see the output from 'lsmod' or 'cat /proc/modules'.
I'm still thinking that those are the HID Boot Protocol modules
that you don't want to use.
 

Here is an lsmod. I haven't loaded anything special. The 2.6 kernels 
seem to load a lot of modules I dont think I need.

Ill prune them when I have time.
# lsmod
Module                  Size  Used by
radeon                 77312  1
drm                    66004  2 radeon
ipv6                  251776  17
nfsd                  223392  8
exportfs                5888  1 nfsd
appletalk              36084  20
lp                     11524  0
nfs                   211816  4
lockd                  65960  3 nfsd,nfs
sunrpc                143684  8 nfsd,nfs,lockd
af_packet              21704  2
psmouse                29256  0
floppy                 59472  0
pcspkr                  3428  0
rtc                    11832  0
snd_ens1371            23968  0
snd_rawmidi            24288  1 snd_ens1371
snd_seq_device          8780  1 snd_rawmidi
snd_ac97_codec         77112  1 snd_ens1371
snd_pcm                91592  2 snd_ens1371,snd_ac97_codec
snd_timer              24452  1 snd_pcm
snd                    55780  6 
snd_ens1371,snd_rawmidi,snd_seq_device,snd_ac97_codec,snd_pcm,snd_timer
snd_page_alloc          9988  1 snd_pcm
btaudio                17360  0
bt878                  11128  0
bttv                  154256  1 bt878
video_buf              21892  1 bttv
firmware_class         10176  1 bttv
i2c_algo_bit            9864  1 bttv
v4l2_common             5824  1 bttv
btcx_risc               4872  1 bttv
tveeprom               13144  1 bttv
videodev                9728  1 bttv
via686a                19992  0
i2c_sensor              3648  1 via686a
i2c_viapro              7952  0
i2c_core               22288  6 
bttv,i2c_algo_bit,tveeprom,via686a,i2c_sensor,i2c_viapro
pci_hotplug            32880  0
via_agp                 9600  1
tsdev                   7744  0
mousedev               11544  2
evdev                   9536  0
usbhid                 33600  0
uhci_hcd               32144  0
usbcore               119352  3 usbhid,uhci_hcd
es1371                 34560  0
soundcore               9760  3 snd,btaudio,es1371
gameport                4480  2 snd_ens1371,es1371
ac97_codec             19660  1 es1371
e100                   34752  0
mii                     5056  1 e100
parport_pc             35972  1
parport                36744  2 lp,parport_pc
agpgart                34600  2 drm,via_agp
capability              4808  0
commoncap               6912  1 capability
ide_cd                 41732  0
cdrom                  40864  1 ide_cd
isofs                  37112  0
ext2                   68616  0
ext3                  142792  4
jbd                    57368  1 ext3
mbcache                 9284  2 ext2,ext3
ide_disk               17856  6
ide_generic             1280  0 [permanent]
via82cxxx              13532  0 [permanent]
trm290                  4292  0 [permanent]
triflex                 3776  0 [permanent]
slc90e66                5760  0 [permanent]
sis5513                16200  0 [permanent]
siimage                12480  0 [permanent]
serverworks             9160  0 [permanent]
sc1200                  7360  0 [permanent]
rz1000                  2560  0 [permanent]
piix                   10180  0 [permanent]
pdc202xx_old           11328  0 [permanent]
opti621                 4420  0 [permanent]
ns87415                 4296  0 [permanent]
hpt366                 19904  0 [permanent]
hpt34x                  5248  0 [permanent]
generic                 3968  0 [permanent]
cy82c693                4740  0 [permanent]
cs5530                  5312  0 [permanent]
cs5520                  4736  0 [permanent]
cmd64x                 12060  0 [permanent]
atiixp                  5904  0 [permanent]
amd74xx                13788  0 [permanent]
alim15x3               12172  0 [permanent]
aec62xx                 7232  0 [permanent]
pdc202xx_new            9152  0 [permanent]
ide_core              129424  28 
ide_cd,ide_disk,ide_generic,via82cxxx,trm290,triflex,slc90e66,sis5513,siimage,serverworks,sc1200,rz1000,piix,pdc202xx_old,opti621,ns87415,hpt366,hpt34x,generic,cy82c693,cs5530,cs5520,cmd64x,atiixp,amd74xx,alim15x3,aec62xx,pdc202xx_new
unix                   27380  54
fbcon                  38336  0
font                    8320  1 fbcon
bitblit                 5632  1 fbcon
vesafb                  8152  0
cfbcopyarea             3968  1 vesafb
cfbimgblt               3008  1 vesafb
cfbfillrect             3584  1 vesafb

 

Do you have /lib/modules/2.6.9/kernel/drivers/usb/input/usb{kbd,mouse}.ko
files?  If so, please rename them to something that won't be
auto-loaded and try your test again.
 

I do but renaming them disables my usb mouse (not good)
| I'd really only want usbkbd as lircd --device dev/input opens 
| /dev/input/event2 to read the events directly. I dont button presses on 
| the remote being translated to keyboard input. Especially the power 
| button which seems to get translated to ^-alt-backspace which causes my 
| X server to restart.
| 
| >| I am sure it is trivial but google has failed me :-)
| >| 
| >| Any help greatly appreciated
| >  
| >
| Thanks for your suggestions.
| 
| I guess I need slightly more specific answer. How do I turn of 
| hid/usbkbd for a specific usb device. I cant turn it off globally as I 
| also have a usb keyboard and mouse.

Modify drivers/usb/input/hid-core.c, around line #1467 (in 2.6.9).
There is a hid_blacklist array there.  Add your device's vendor ID,
product ID, and quirk (HID_QUIRK_IGNORE).  Rebuild & reload the hid driver
and you should be all set.
 

Thanks. I can do that. I guess I was hoping to be able to do that 
through some config file.

I actually though that I could do it with the hotplug usb.usermap files 
but could not find any info on how.

I have discovered that the latest lircd turns off the usbkbd when it 
opens the /dev/input/event2 (not sure how, simply openning 
/dev/input/event2 does not) . So it all works as long as lircd is running

Thanks for you help.
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