On Thu, Dec 04, 2008 at 10:56:32AM -0800, Greg KH wrote:
> On Thu, Dec 04, 2008 at 09:27:15AM -0600, Karl O. Pinc wrote:
> >
> > I think what the Digi Edgeport 4/16 needs is the same rule set, but
> > with the serial number also included in the name. This is because
> > it has an internal hub with 8 endpoints, each endpoint driving 2
> > serial ports (io_ti), and my understanding is that the ports on the
> > internal hub may not be discovered in the same order every time.
> > However, each internal endpoint does have it's own serial
> > number. If that showed in the name then there'd be no
> > problem.
> >
> > Of course I could be completely misunderstanding.
>
> Hm, good point, I think the by_id stuff will start conflicting if 2 of
> the same types of devices are plugged in at the same time.
>
> Let me go dig through my boxes of usb stuff to find some duplicate
> devices, and one of the 4/16 edgeport devices as well...
Not a problem, the serial number is added to the "by-id" tree if it is
present:
$ tree /dev/serial/
/dev/serial/
|-- by-id
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port0 -> ../../ttyUSB8
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port1 -> ../../ttyUSB9
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port2 -> ../../ttyUSB10
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port3 -> ../../ttyUSB11
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port4 -> ../../ttyUSB12
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port5 -> ../../ttyUSB13
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port6 -> ../../ttyUSB14
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port7 -> ../../ttyUSB15
| |-- usb-Keyspan_Serial-if00-port0 -> ../../ttyUSB0
| |-- usb-Keyspan__a_division_of_InnoSys_Inc._Keyspan_USB_Serial_Adapter-if00-port0 -> ../../ttyUSB1
| |-- usb-Keyspan__a_division_of_InnoSys_Inc._Keyspan_USB_Serial_Adapter-if00-port1 -> ../../ttyUSB2
| `-- usb-Prolific_Technology_Inc._USB-Serial_Controller-if00-port0 -> ../../ttyUSB7
`-- by-path
|-- pci-0000:00:1d.2-usb-0:1.3:1.0-port0 -> ../../ttyUSB7
|-- pci-0000:00:1d.7-usb-0:6.1.4.1:1.0-port0 -> ../../ttyUSB0
|-- pci-0000:00:1d.7-usb-0:6.1.4.4:1.0-port0 -> ../../ttyUSB1
|-- pci-0000:00:1d.7-usb-0:6.1.4.4:1.0-port1 -> ../../ttyUSB2
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port0 -> ../../ttyUSB8
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port1 -> ../../ttyUSB9
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port2 -> ../../ttyUSB10
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port3 -> ../../ttyUSB11
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port4 -> ../../ttyUSB12
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port5 -> ../../ttyUSB13
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port6 -> ../../ttyUSB14
`-- pci-0000:00:1d.7-usb-0:6.3:1.0-port7 -> ../../ttyUSB15
The problem is when you have 2 devices with no serial numbers, the last
one in wins the "by_id" classification:
$ tree /dev/serial/
/dev/serial/
|-- by-id
| `-- usb-067b_2303-if00-port0 -> ../../ttyUSB3
`-- by-path
|-- pci-0000:00:1d.7-usb-0:6.1.4.2.1:1.0-port0 -> ../../ttyUSB0
|-- pci-0000:00:1d.7-usb-0:6.1.4.2.2:1.0-port0 -> ../../ttyUSB1
|-- pci-0000:00:1d.7-usb-0:6.1.4.2.3:1.0-port0 -> ../../ttyUSB2
`-- pci-0000:00:1d.7-usb-0:6.1.4.2.4:1.0-port0 -> ../../ttyUSB3
This is a 4 port, pl2303 device that is really a hub with 4 devices
behind it. No serial number either, so the by-id path isn't the best
choice, but the by-path one is.
And, just for fun, here's a bunch of usb-serial devices all plugged in
at the same time:
/dev/serial
|-- by-id
| |-- usb-067b_2303-if00-port0 -> ../../ttyUSB3
| |-- usb-ACME_usb_widgets_ACME_USB_serial_widget_47-if00-port0 -> ../../ttyUSB19
| |-- usb-Inside_Out_Networks_Edgeport_4_04-01-006467-if00-port0 -> ../../ttyUSB20
| |-- usb-Inside_Out_Networks_Edgeport_4_04-01-006467-if00-port1 -> ../../ttyUSB21
| |-- usb-Inside_Out_Networks_Edgeport_4_04-01-006467-if00-port2 -> ../../ttyUSB22
| |-- usb-Inside_Out_Networks_Edgeport_4_04-01-006467-if00-port3 -> ../../ttyUSB23
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port0 -> ../../ttyUSB4
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port1 -> ../../ttyUSB5
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port2 -> ../../ttyUSB6
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port3 -> ../../ttyUSB7
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port4 -> ../../ttyUSB8
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port5 -> ../../ttyUSB9
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port6 -> ../../ttyUSB10
| |-- usb-Inside_Out_Networks_Edgeport_8_V12124599-if00-port7 -> ../../ttyUSB11
| |-- usb-Keyspan_Serial-if00-port0 -> ../../ttyUSB14
| |-- usb-Keyspan__a_division_of_InnoSys_Inc._Keyspan_USB_Serial_Adapter-if00-port0 -> ../../ttyUSB24
| |-- usb-Keyspan__a_division_of_InnoSys_Inc._Keyspan_USB_Serial_Adapter-if00-port1 -> ../../ttyUSB25
| |-- usb-Prolific_Technology_Inc._USB-Serial_Controller-if00-port0 -> ../../ttyUSB17
| `-- usb-USB-RS232_Interface_Converter_USB_Ver1.1_Device_679016-if00-port0 -> ../../ttyUSB18
`-- by-path
|-- pci-0000:00:1d.2-usb-0:1.2:1.0-port0 -> ../../ttyUSB19
|-- pci-0000:00:1d.2-usb-0:1.3:1.0-port0 -> ../../ttyUSB17
|-- pci-0000:00:1d.7-usb-0:6.1.1:1.0-port0 -> ../../ttyUSB24
|-- pci-0000:00:1d.7-usb-0:6.1.1:1.0-port1 -> ../../ttyUSB25
|-- pci-0000:00:1d.7-usb-0:6.1.2:1.0-port0 -> ../../ttyUSB20
|-- pci-0000:00:1d.7-usb-0:6.1.2:1.0-port1 -> ../../ttyUSB21
|-- pci-0000:00:1d.7-usb-0:6.1.2:1.0-port2 -> ../../ttyUSB22
|-- pci-0000:00:1d.7-usb-0:6.1.2:1.0-port3 -> ../../ttyUSB23
|-- pci-0000:00:1d.7-usb-0:6.1.3:1.0-port0 -> ../../ttyUSB18
|-- pci-0000:00:1d.7-usb-0:6.1.4.1:1.0-port0 -> ../../ttyUSB15
|-- pci-0000:00:1d.7-usb-0:6.1.4.1:1.0-port1 -> ../../ttyUSB16
|-- pci-0000:00:1d.7-usb-0:6.1.4.2.1:1.0-port0 -> ../../ttyUSB0
|-- pci-0000:00:1d.7-usb-0:6.1.4.2.2:1.0-port0 -> ../../ttyUSB1
|-- pci-0000:00:1d.7-usb-0:6.1.4.2.3:1.0-port0 -> ../../ttyUSB2
|-- pci-0000:00:1d.7-usb-0:6.1.4.2.4:1.0-port0 -> ../../ttyUSB3
|-- pci-0000:00:1d.7-usb-0:6.1.4.3:1.0-port0 -> ../../ttyUSB14
|-- pci-0000:00:1d.7-usb-0:6.1.4.4:1.0-port0 -> ../../ttyUSB12
|-- pci-0000:00:1d.7-usb-0:6.1.4.4:1.0-port1 -> ../../ttyUSB13
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port0 -> ../../ttyUSB4
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port1 -> ../../ttyUSB5
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port2 -> ../../ttyUSB6
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port3 -> ../../ttyUSB7
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port4 -> ../../ttyUSB8
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port5 -> ../../ttyUSB9
|-- pci-0000:00:1d.7-usb-0:6.3:1.0-port6 -> ../../ttyUSB10
`-- pci-0000:00:1d.7-usb-0:6.3:1.0-port7 -> ../../ttyUSB11
Hope this helps,
greg k-h
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