usbmc seems broken

usbmc seems broken

[Neil Kalo]

I cannot get usbtmc to work with my device. I am using fedora 12:
2.6.31.12-174.2.3.fc12.i686.PAE

Jan 22 15:40:26 localhost kernel: usb 4-1: new full speed USB device
using ohci_hcd and address 4
Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device found,
idVendor=05e6, idProduct=2100
Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device strings:
Mfr=2, Product=3, SerialNumber=1
Jan 22 15:40:26 localhost kernel: usb 4-1: Product: 2100 Multimeter
Jan 22 15:40:26 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
Jan 22 15:40:26 localhost kernel: usb 4-1: SerialNumber: 1160791
Jan 22 15:40:26 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
Jan 22 15:40:26 localhost kernel: usbtmc 4-1:1.0: can't read capabilities

If I compile the original Agilent module from
"http://www.home.agilent.com/upload/cmc_upload/All/usbtmc.html" It
works fine:

Jan 22 15:37:45 localhost kernel: usb 4-1: new full speed USB device
using ohci_hcd and address 3
Jan 22 15:37:45 localhost kernel: usb 4-1: New USB device found,
idVendor=05e6, idProduct=2100
Jan 22 15:37:45 localhost kernel: usb 4-1: New USB device strings:
Mfr=2, Product=3, SerialNumber=1
Jan 22 15:37:45 localhost kernel: usb 4-1: Product: 2100 Multimeter
Jan 22 15:37:45 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
Jan 22 15:37:45 localhost kernel: usb 4-1: SerialNumber: 1160791
Jan 22 15:37:45 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
Jan 22 15:37:45 localhost kernel: USBTMC: MKDEV
Jan 22 15:37:45 localhost kernel: USBTMC: CDEV_ADD f900000 1

Note that I do get one error line per module load, but this does not
prevent the device from working in my application:
Jan 22 15:38:21 localhost kernel: USBTMC: Unable to read data, error -110

This error also sometimes occurs with the standard kernel module, but
I never get a functioning connection to my device:
Jan 16 23:43:36 localhost kernel: usbtmc 1-4.1.1:1.0: can't read capabilities
Jan 16 23:52:31 localhost kernel: usbtmc 1-4.1.1:1.0: Unable to read
data, error -110

Where do I go from here?

Re: usbmc seems broken

[Andrew Morton]

(cc's added)

On Fri, 22 Jan 2010 16:40:06 +0000
Neil Kalo <neilkalo@gmail.com> wrote:

> I cannot get usbtmc to work with my device. I am using fedora 12:
> 2.6.31.12-174.2.3.fc12.i686.PAE
> 
> Jan 22 15:40:26 localhost kernel: usb 4-1: new full speed USB device
> using ohci_hcd and address 4
> Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device found,
> idVendor=05e6, idProduct=2100
> Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device strings:
> Mfr=2, Product=3, SerialNumber=1
> Jan 22 15:40:26 localhost kernel: usb 4-1: Product: 2100 Multimeter
> Jan 22 15:40:26 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
> Jan 22 15:40:26 localhost kernel: usb 4-1: SerialNumber: 1160791
> Jan 22 15:40:26 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
> Jan 22 15:40:26 localhost kernel: usbtmc 4-1:1.0: can't read capabilities
> 
> If I compile the original Agilent module from
> "http://www.home.agilent.com/upload/cmc_upload/All/usbtmc.html" It
> works fine:
> 
> Jan 22 15:37:45 localhost kernel: usb 4-1: new full speed USB device
> using ohci_hcd and address 3
> Jan 22 15:37:45 localhost kernel: usb 4-1: New USB device found,
> idVendor=05e6, idProduct=2100
> Jan 22 15:37:45 localhost kernel: usb 4-1: New USB device strings:
> Mfr=2, Product=3, SerialNumber=1
> Jan 22 15:37:45 localhost kernel: usb 4-1: Product: 2100 Multimeter
> Jan 22 15:37:45 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
> Jan 22 15:37:45 localhost kernel: usb 4-1: SerialNumber: 1160791
> Jan 22 15:37:45 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
> Jan 22 15:37:45 localhost kernel: USBTMC: MKDEV
> Jan 22 15:37:45 localhost kernel: USBTMC: CDEV_ADD f900000 1
> 
> Note that I do get one error line per module load, but this does not
> prevent the device from working in my application:
> Jan 22 15:38:21 localhost kernel: USBTMC: Unable to read data, error -110
> 
> This error also sometimes occurs with the standard kernel module, but
> I never get a functioning connection to my device:
> Jan 16 23:43:36 localhost kernel: usbtmc 1-4.1.1:1.0: can't read capabilities
> Jan 16 23:52:31 localhost kernel: usbtmc 1-4.1.1:1.0: Unable to read
> data, error -110
> 
> Where do I go from here?

Re: usbmc seems broken

[Greg KH]

On Tue, Jan 26, 2010 at 05:01:25PM -0800, Andrew Morton wrote:
> (cc's added)
> 
> On Fri, 22 Jan 2010 16:40:06 +0000
> Neil Kalo <neilkalo@gmail.com> wrote:
> 
> > I cannot get usbtmc to work with my device. I am using fedora 12:
> > 2.6.31.12-174.2.3.fc12.i686.PAE
> > 
> > Jan 22 15:40:26 localhost kernel: usb 4-1: new full speed USB device
> > using ohci_hcd and address 4
> > Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device found,
> > idVendor=05e6, idProduct=2100
> > Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device strings:
> > Mfr=2, Product=3, SerialNumber=1
> > Jan 22 15:40:26 localhost kernel: usb 4-1: Product: 2100 Multimeter
> > Jan 22 15:40:26 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
> > Jan 22 15:40:26 localhost kernel: usb 4-1: SerialNumber: 1160791
> > Jan 22 15:40:26 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
> > Jan 22 15:40:26 localhost kernel: usbtmc 4-1:1.0: can't read capabilities

This was a bug in this version of the driver.

Please upgrade to 2.6.32, the problem is fixed.

If you are curious, commit id d0a38365d9585bf3fb71f7c57fd532441a14f3e8
solved the problem.

Hope this helps,

greg k-h

Re: usbmc seems broken

[Neil Kalo]

Upgraded to: 2.6.32.7-37.fc12.i686.PAE

Still no joy. Plugging in the meter gives:

Feb  4 08:27:04 localhost kernel: usb 4-1: new full speed USB device
using ohci_hcd and address 2
Feb  4 08:27:04 localhost kernel: usb 4-1: New USB device found,
idVendor=05e6, idProduct=2100
Feb  4 08:27:04 localhost kernel: usb 4-1: New USB device strings:
Mfr=2, Product=3, SerialNumber=1
Feb  4 08:27:04 localhost kernel: usb 4-1: Product: 2100 Multimeter
Feb  4 08:27:04 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
Feb  4 08:27:04 localhost kernel: usb 4-1: SerialNumber: 1160791
Feb  4 08:27:04 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
Feb  4 08:27:04 localhost kernel: usbcore: registered new interface
driver usbtmc

But "cat /dev/usbtmc0" gives:
cat: /dev/usbtmc0: Connection timed out

And in the logs:
Feb  4 08:27:35 localhost kernel: usbtmc 4-1:1.0: Unable to read data,
error -110

The very old driver still works:

Feb  4 08:31:02 localhost kernel: USBTMC: MKDEV
Feb  4 08:31:02 localhost kernel: USBTMC: CDEV_ADD f900000 1
Feb  4 08:31:02 localhost kernel: usbcore: registered new interface
driver USBTMC

[root@mc22 usbtmc-module]# cat /dev/usbtmc0
Minor Number    Manufacturer    Product Serial Number
001     KEITHLEY INSTRUMENTS    2100 Multimeter 1160791

On Wed, Jan 27, 2010 at 1:59 AM, Greg KH <greg@kroah.com> wrote:
> On Tue, Jan 26, 2010 at 05:01:25PM -0800, Andrew Morton wrote:
>> (cc's added)
>>
>> On Fri, 22 Jan 2010 16:40:06 +0000
>> Neil Kalo <neilkalo@gmail.com> wrote:
>>
>> > I cannot get usbtmc to work with my device. I am using fedora 12:
>> > 2.6.31.12-174.2.3.fc12.i686.PAE
>> >
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: new full speed USB device
>> > using ohci_hcd and address 4
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device found,
>> > idVendor=05e6, idProduct=2100
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device strings:
>> > Mfr=2, Product=3, SerialNumber=1
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: Product: 2100 Multimeter
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: SerialNumber: 1160791
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
>> > Jan 22 15:40:26 localhost kernel: usbtmc 4-1:1.0: can't read capabilities
>
> This was a bug in this version of the driver.
>
> Please upgrade to 2.6.32, the problem is fixed.
>
> If you are curious, commit id d0a38365d9585bf3fb71f7c57fd532441a14f3e8
> solved the problem.
>
> Hope this helps,
>
> greg k-h
>

Re: usbmc seems broken

[Greg KH]

On Thu, Feb 04, 2010 at 08:32:21AM +0000, Neil Kalo wrote:
> Upgraded to: 2.6.32.7-37.fc12.i686.PAE
> 
> Still no joy. Plugging in the meter gives:
> 
> Feb  4 08:27:04 localhost kernel: usb 4-1: new full speed USB device
> using ohci_hcd and address 2
> Feb  4 08:27:04 localhost kernel: usb 4-1: New USB device found,
> idVendor=05e6, idProduct=2100
> Feb  4 08:27:04 localhost kernel: usb 4-1: New USB device strings:
> Mfr=2, Product=3, SerialNumber=1
> Feb  4 08:27:04 localhost kernel: usb 4-1: Product: 2100 Multimeter
> Feb  4 08:27:04 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
> Feb  4 08:27:04 localhost kernel: usb 4-1: SerialNumber: 1160791
> Feb  4 08:27:04 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
> Feb  4 08:27:04 localhost kernel: usbcore: registered new interface
> driver usbtmc
> 
> But "cat /dev/usbtmc0" gives:
> cat: /dev/usbtmc0: Connection timed out
> 
> And in the logs:
> Feb  4 08:27:35 localhost kernel: usbtmc 4-1:1.0: Unable to read data,
> error -110
> 
> The very old driver still works:
> 
> Feb  4 08:31:02 localhost kernel: USBTMC: MKDEV
> Feb  4 08:31:02 localhost kernel: USBTMC: CDEV_ADD f900000 1
> Feb  4 08:31:02 localhost kernel: usbcore: registered new interface
> driver USBTMC
> 
> [root@mc22 usbtmc-module]# cat /dev/usbtmc0
> Minor Number    Manufacturer    Product Serial Number
> 001     KEITHLEY INSTRUMENTS    2100 Multimeter 1160791

Care to try to figure out what is going wrong here and send a patch?

thanks,

greg k-h