Nicola Maggi wrote:
> On Wed, May 27, 2009 at 3:19 PM, Mark Stodola<[log in to unmask]> wrote:
>   
>> Nicola Maggi wrote:
>>     
>>> Hello to everyone,
>>> I have a Scientific Linux CERN 4 installation and I need to control an
>>> usb device with it.
>>> My device is an Opal Kelly FPGA with an usb interface.
>>> I need to access it from some c++ code.
>>> In the FPGA user manual they say:
>>> __________
>>> The Linux installation requires the addition of one file to the directory:
>>>
>>>   60-opalkelly.rules ----->  /etc/udev/rules.d/
>>>
>>> This file includes a generic udev rule to set the permissions on all
>>> attached Opal Kelly USB devices to allow user access.  Once this file is
>>> in place, you will need to reload the rules by either rebooting or using
>>> the following command:
>>>
>>>   /sbin/udevcontrol reload_rules
>>> __________
>>> I successfully copied the file into rules.d/ but I still have some
>>> problem.
>>> I don't have the /sbin/udevcontrol application:
>>> all the application with udev in their  name are:
>>> udevinfo
>>> udevtest
>>> start_udev
>>> udev
>>> udevd
>>> udevstart
>>> udevstart.static
>>> udev.static
>>> udev_colume_id
>>>
>>> the file 60-opalkelly.rules is pasted at the and of this mail.
>>> How do I make the system load this rule manually?
>>> If I reboot while the device is connected everything works fine,
>>> except that I can only access the FPGA with root priviledges. Any way
>>> to allow users to use it?
>>> Thank you in advance,
>>> Nicola Maggi
>>>
>>>
>>> # udev rules file for all Opal Kelly VID matches.
>>> # This file allows udev to change the mode to 666 (all read/write)
>>> # for any Opal Kelly VID.
>>> #
>>>
>>> # For FedoraCore 5 and similar:
>>> SUBSYSTEM=="usb_device", SYSFS{idVendor}=="151f", MODE="0666"
>>>
>>> # For FedoraCore 7 and similar:
>>> SUBSYSTEM=="usb", ATTRS{idVendor}=="151f", MODE="0666"
>>>
>>>       
>> Nicola,
>>
>> Those rules look like they were written for a different version of udev than
>> what SL 4 provides.
>> In order to reload new rules in SL 4, simply executing 'udevstart' should do
>> the trick.  It will cause a reload.
>> As for the rules, you'll need to rewrite them, which isn't difficult.
>> Newer udev (like the one in SL 5) have changed to allow everything in 1
>> definition similar to what you have provided.
>> The MODE entry isn't supported, you'll need an entry in
>> /etc/udev/permissions.d/ to handle that.
>> It will help if you know the device node name when writing the rules, or to
>> define one that will be consistent.
>>
>> For example, here is what I use to make sure a serial adapter is always
>> detected correctly with the permissions I want:
>> # /etc/udev/rules.d/11-edgeport.rules
>> BUS="usb" SYSFS{idVendor}="1608" SYSFS{idProduct}="0201" SYSFS{serial}="*-0"
>> NAME="%k" SYMLINK="ttyEDGE0%e"
>> BUS="usb" SYSFS{idVendor}="1608" SYSFS{idProduct}="0201" SYSFS{serial}="*-1"
>> NAME="%k" SYMLINK="ttyEDGE1%e"
>>
>> This generates /dev/ttyEDGE0, /dev/ttyEDGE01, /dev/ttyEDGE1, /dev/ttyEDGE11
>> aliased to the correct /dev/ttyUSB#.
>>
>> # /etc/udev/permissions.d/10-udev.permissions
>> ttyS*:root:uucp:0666
>> ttyUSB*:root:uucp:0666
>>
>> This gives any device node of /dev/ttyS# or /dev/tty/USB# permissions of
>> 0666.
>>
>> I hope that helps.
>>
>> Cheers,
>> Mark
>>
>> --
>> Mr. Mark V. Stodola
>> Digital Systems Engineer
>>
>> National Electrostatics Corp.
>> P.O. Box 620310
>> Middleton, WI 53562-0310 USA
>> Phone: (608) 831-7600
>> Fax: (608) 831-9591
>>
>>
>>     
>
> Hi,
> thanks for the useful help but I just managed to find some time to
> work on this problem.
>
> I modified my 60-opalkelly.rules as follows:
>
> # udev rules file for all Opal Kelly VID matches.
> # This file allows udev to change the mode to 666 (all read/write)
> # for any Opal Kelly VID.
> #
>
> # For FedoraCore 5 and similar:
> SUBSYSTEM=="usb_device", SYSFS{idVendor}=="151f", NAME="%k", SYMLINK="usbFP%n"
>
> # For FedoraCore 7 and similar:
> SUBSYSTEM=="usb", ATTRS{idVendor}=="151f",NAME="%k", SYMLINK="usbFP%n"
>
> and added this lines in the 50-udev.permissions file:
> #opalkelly devices
> usbFP*:nick2k3:nick2k3:0666
>
> where nick2k3 is my non-root user.
>
> I notice no change after a reboot or running /sbin/udevstart
> Furthermore there is no usbFP device in /dev/ directory.
> any hints?
>
> (Anyway nothing I have done seems to prevent root access to the device
> - which I think is a lucky thing-)
>
> Thank you in advance,
> Nicola
>   
Nicola,

Try changing SUBSYSTEM="usb_device" to BUS="usb".  I don't recall 
SUBSYSTEM being supported in SL4.
You can also debug your rules using udevinfo and udevtest.  lsusb might 
help as well, to verify vendor ID and such.

Cheers,
Mark

-- 
Mr. Mark V. Stodola
Digital Systems Engineer

National Electrostatics Corp.
P.O. Box 620310
Middleton, WI 53562-0310 USA
Phone: (608) 831-7600
Fax: (608) 831-9591