Some newer switch models from HP has a usb2serial port in them.
I just got to try one out and it sort of works with the generic
usbserial driver.
The problem I am seeing is that it always use 9600 bps, even if I
specify 115200 or 19200.
Is it possible to troubleshoot this in any way, I can test patches if
needed.
This is on a vanilla 3.17.1 kernel.
Here are the details:
modprobe usbserial vendor=0x3f0 product=0x13f
[ 188.018495] usbcore: registered new interface driver usbserial
[ 188.018522] usbcore: registered new interface driver usbserial_generic
[ 188.018547] usbserial: USB Serial support registered for generic
[ 188.018575] usbserial_generic 3-2:1.0: Generic device with no bulk
out, not allowed.
[ 188.018591] usbserial_generic: probe of 3-2:1.0 failed with error -5
[ 188.018607] usbserial_generic 3-2:1.1: The "generic" usb-serial
driver is only for testing and one-off prototypes.
[ 188.018612] usbserial_generic 3-2:1.1: Tell linux-usb@xxxxxxxxxxxxxxx
to add your device to a proper driver.
[ 188.018617] usbserial_generic 3-2:1.1: generic converter detected
[ 188.018828] usb 3-2: generic converter now attached to ttyUSB0
root@computer:/tmp# lsusb -vvv -d 03f0:013f
Bus 003 Device 003: ID 03f0:013f Hewlett-Packard
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x03f0 Hewlett-Packard
idProduct 0x013f
bcdDevice 0.01
iManufacturer 1 HP
iProduct 2 HPN Serial Port
iSerial 3 A7735230001
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 75
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x20
(Missing must-be-set bit!)
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 2 Abstract (modem)
bFunctionProtocol 0 None
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 0
CDC Header:
bcdCDC 1.10
CDC ACM:
bmCapabilities 0x06
sends break
line coding and serial state
CDC Union:
bMasterInterface 0
bSlaveInterface 1
CDC Call Management:
bmCapabilities 0x01
call management
bDataInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 2
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)
Thanks for any help
/Andreas
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