USB-Blaster 2.6 kernel problem

I had similar problem on Fedora core 6, which use udev too.

$ jtagconfig
1) USB_Blaster 
  Unable to lock chain (Insufficient port permissions)

I changed the mode to "0666" but still have the same error.

ACTION=="add", SUBSYSTEM=="usb_device", 
        PROGRAM="/bin/sh -c 'K=%k; K=$${K#usbdev}; printf bus/usb/%%03i/%%03i $${K%%%%.*} $${K#*.}'", 
        NAME="%c", MODE="0644"

Strangely, after some tries it worked once or twice, but failed later. I think jtagd did not get correct device. And jtagconfig can not handle the "add".

hi hippo

your problem is "Insufficient port permissions"

your USB-Blaster is recognized OK, only need to change permission on creation

try to change to 0777 it is risky but may help you to resolv the problem.

please write me how you configure you USB-Blaster from begin to end and step by step

it may help me to resolve my problem.

Actually, FC6 might detect jtag without changing udev rules. The jtag got detected sometime with root account. I have to disable SELinux to run nios2-configure-sof. I tried changing the mode to 0666 in 50-udev.rules to get user access. Sometime it works, but mostly fails.

There is no /etc/hotplug dir in FC6. The /etc/udev rules changed a lot from RHEL4. In FC6, the udev add the jtag as /dev/bus/usb/004/002 dev, the bus number may be different for different usb ports. I think you should not name the dev as "usbblaster".

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originally posted by hippo@Dec 27 2006, 09:00 PM

actually, fc6 might detect jtag without changing udev rules. the jtag got detected sometime with root account. i have to disable selinux to run nios2-configure-sof. i tried changing the mode to 0666 in 50-udev.rules to get user access. sometime it works, but mostly fails.

there is no /etc/hotplug dir in fc6. the /etc/udev rules changed a lot from rhel4. in fc6, the udev add the jtag as /dev/bus/usb/004/002 dev, the bus number may be different for different usb ports. i think you should not name the dev as "usbblaster".

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It seems i ran into most of the problems above with my FC6 install, but i believe i discovered a solution to the flakyness of jtagconfig runnning as a user and getting invalid port permissions.

I am still not sure of the cause, but running the JTAGD as a service (IE: as root without the typical --user-launch option (i think the name is wrong) that is used when running jtagconfig directly without jtagd running) resolves the issue. I can now consistently use the usbblaster in my fresh FC6 install.

first, change the udev rules to allow users access to the usbblaster

I created a new udev rule in /etc/udev/rules.d called usbblaster.rules

BUS=="usb", SYSFS{product}=="USB-Blaster", SYMLINK+="usbblaster", MODE="0666"

**NB this rule does not handle plugging in multiple USB Blasters, i didn&#39;t care as i only use one.. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif

next, i created and initscript for jtagd :

# !/bin/bash# # Init file for Altera JTAGD# # chkconfig: 2345 60 25# description: JTAG daemon# # processname: jtagd# config: /etc/jtagd

# source function library

. /etc/rc.d/init.d/functions

RETVAL=0

prog="jtagd"

PID_FILE=/var/run/jtagd.pid

JTAGD=/opt/altera6.1/quartus/bin/jtagd

start()

{

echo -n $"Starting $prog: "

$JTAGD && success || failure

RETVAL=$?

pidofproc $prog >> $PID_FILE

echo

}

stop()

{

echo -n $"Stopping $prog: "

if [ -n "`pidfileofproc $JTAGD`" ] ; then

killproc $JTAGD

else

failure $"Stopping $prog"

fi

echo

}

case "$1" in

start)

start

;;

stop)

stop

;;

restart)

stop

start

;;

*)

echo $"Usage: $0 {start|stop|restart}"

RETVAL=1

esac

exit $RETVAL

set the permissions, add it to all the runlevels (chkconfig --add jtagd)

don&#39;t forget to change the path to the JTAGD to match your install path.

The next step is to create the /etc/jtagd and put the pgm_parts stuff in it so all the parts would be recognized correctly.

# mkdir /etc/jtagd # cp /opt/altera6.1/quartus/linux/pgm_parts.txt /etc/jtagd

and then there seemed to be some confusion as to what this file should be named, so i shotgunned it and used them all

# ln -s /etc/pgm_parts.txt /etc/jtagd/pgm_parts# ln -s /etc/pgm_parts.txt /etc/jtagd/jtagd.pgm_parts

start the service as root# /etc/init.d/jtagd start

and TADA!! everything magically works.

--dalon