Please excuse my presumption from bothering the list with something that is probably an implementation problem by the manufacturer. I thought I would take this "shot in the dark" in case you all have something to suggest. I'm running SL6 (like RHEL6) with kernel 2.6.32, and seem to have the 1.5.0 version of the ftdi_sio driver. My program works fine, but hangs just after the machine has been booted. If I cycle the power to the Thorlabs TDC001 motor controller, my program then works until the next boot. This will not be convenient when we send this instrument to the observatory. Here's the system seeing the device: Apr 28 13:59:03 archelon kernel: usb 3-9: new full speed USB device number 4 usi ng xhci_hcd Apr 28 13:59:03 archelon kernel: usb 3-9: New USB device found, idVendor=0403, i dProduct=faf0 Apr 28 13:59:03 archelon kernel: usb 3-9: New USB device strings: Mfr=1, Product =2, SerialNumber=3 Apr 28 13:59:03 archelon kernel: usb 3-9: Product: APT DC Motor Controller Apr 28 13:59:03 archelon kernel: usb 3-9: Manufacturer: Thorlabs Apr 28 13:59:03 archelon kernel: usb 3-9: SerialNumber: 83850633 Apr 28 13:59:03 archelon kernel: usb 3-9: configuration #1 chosen from 1 choice Apr 28 13:59:03 archelon kernel: usbcore: registered new interface driver usbser ial Apr 28 13:59:03 archelon kernel: USB Serial support registered for generic Apr 28 13:59:03 archelon kernel: usbcore: registered new interface driver usbser ial_generic Apr 28 13:59:03 archelon kernel: usbserial: USB Serial Driver core Apr 28 13:59:03 archelon kernel: USB Serial support registered for FTDI USB Seri al Device Apr 28 13:59:03 archelon kernel: ftdi_sio 3-9:1.0: FTDI USB Serial Device conver ter detected Apr 28 13:59:03 archelon kernel: usb 3-9: Detected FT232RL Apr 28 13:59:03 archelon kernel: usb 3-9: Number of endpoints 2 Apr 28 13:59:03 archelon kernel: usb 3-9: Endpoint 1 MaxPacketSize 64 Apr 28 13:59:03 archelon kernel: usb 3-9: Endpoint 2 MaxPacketSize 64 Apr 28 13:59:03 archelon kernel: usb 3-9: Setting MaxPacketSize 64 Apr 28 13:59:03 archelon kernel: usb 3-9: FTDI USB Serial Device converter now a ttached to ttyUSB0 Apr 28 13:59:03 archelon kernel: usbcore: registered new interface driver ftdi_s io Apr 28 13:59:03 archelon kernel: ftdi_sio: v1.5.0:USB FTDI Serial Converters Dri ver As you see, it properly can talk to the device and get configuration info from it. Here is some usbmon output when it is hung: ffff880431c03540 4282392379 S Co:3:005:0 s 40 09 0001 0000 0000 0 ffff880431c03540 4282392453 C Co:3:005:0 0 0 ffff880431c03540 4282392474 S Co:3:005:0 s 40 00 0000 0000 0000 0 ffff880431c03540 4282392527 C Co:3:005:0 0 0 ffff880431c03540 4282392572 S Co:3:005:0 s 40 04 0008 0000 0000 0 ffff880431c03540 4282392619 C Co:3:005:0 0 0 ffff880431c03540 4282392648 S Co:3:005:0 s 40 03 001a 0000 0000 0 ffff880431c03540 4282392692 C Co:3:005:0 0 0 ffff880431c03540 4282392718 S Co:3:005:0 s 40 02 0000 0100 0000 0 ffff880431c03540 4282392762 C Co:3:005:0 0 0 ffff8804333c2180 4282392789 S Bi:3:005:1 -115 512 < ffff880431c03540 4282392797 S Co:3:005:0 s 40 01 0303 0000 0000 0 ffff8804333c2180 4282392812 C Bi:3:005:1 0 2 = 1160 ffff8804333c2180 4282392815 S Bi:3:005:1 -115 512 < ffff880431c03540 4282392868 C Co:3:005:0 0 0 ffff880431c03540 4282393166 S Co:3:005:0 s 40 04 0008 0000 0000 0 ffff880431c03540 4282393217 C Co:3:005:0 0 0 ffff880431c03540 4282393308 S Co:3:005:0 s 40 03 001a 0000 0000 0 ffff880431c03540 4282393358 C Co:3:005:0 0 0 ffff880431c03540 4282393399 S Co:3:005:0 s 40 02 0000 0100 0000 0 ffff880431c03540 4282393442 C Co:3:005:0 0 0 ffff880431c03540 4282393475 S Ci:3:005:0 s c0 05 0000 0000 0002 2 < ffff880431c03540 4282393523 C Ci:3:005:0 0 2 = 1160 ffff880431c03540 4282393546 S Co:3:005:0 s 40 01 0303 0000 0000 0 ffff880431c03540 4282393580 C Co:3:005:0 0 0 ffff880431c03540 4282393607 S Bo:3:005:2 -115 6 = 23020000 0000 ffff880431c03540 4282393632 C Bo:3:005:2 0 6 > ffff8804333c2180 4282393773 C Bi:3:005:1 0 2 = 1100 ffff8804333c2180 4282393776 S Bi:3:005:1 -115 512 < ffff8804333c2180 4282394813 C Bi:3:005:1 0 2 = 1160 ffff8804333c2180 4282394820 S Bi:3:005:1 -115 512 < ffff8804333c2180 4282395813 C Bi:3:005:1 0 2 = 1160 ffff8804333c2180 4282395820 S Bi:3:005:1 -115 512 < Last two lines repeat for as long as I've looked. Thanks for any attention and light you can shed on this. -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
