cxacru: USB ethernet port of CX82310-based ADSL routers?

DISCUSSION Ondrej Zary 2 participants 4 messages Aug 31, 2010 – Sep 1, 2010

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Ondrej Zary

author

2010-08-31 21:13 UTC #0 lore raw

Hello,
I have an ADSL router based on Conexant CX82310 chip. This chip provides both ethernet and USB interfaces. The ethernet interface is often internally connected to a 5-port switch (in my case too). The USB interface works as an ethernet card in Windows (using proprietary driver). In Linux, the cxacru driver binds to the device but does not work (no wonder - it's doing firmware things in an attempt to bring an ADSL modem up).

I captured a log from Windows (device connect, DHCP and disconnect):
http://www.rainbow-software.org/linux_files/cx82310/cx-run-dhcp.log

The commands seem to match the enums in cxacru
driver (and go to endpoint 1):
0x84, 0x85, 0x90, 0x91, 0x92, 0x99 (unknown)
Data goes to/from endpoint 2 as ethernet frames (with something at the beginning).

I wonder how to implement support for this device in cxacru driver. Or would be a separate driver better?

lsusb output:

Bus 001 Device 003: ID 0572:cb01 Conexant Systems (Rockwell), Inc. GeekADSL Promax Q31 ADSL Modem Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0572 Conexant Systems (Rockwell), Inc.
idProduct 0xcb01 GeekADSL Promax Q31 ADSL Modem
bcdDevice 1.00

  iManufacturer           1 -
  iProduct                2 USB NET CARD
  iSerial                 3 00000060
  bNumConfigurations      1

Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 80mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 0 (Defined at Interface level)
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 4
Device Status: 0x0001
Self Powered

Signature · 1 line

Ondrej Zary

Simon Arlott

2010-08-31 22:15 UTC #1 lore raw

Quoted 11 lines · Ondrej Zary

Hello,
I have an ADSL router based on Conexant CX82310 chip. This chip provides both ethernet and USB interfaces. The ethernet interface is often internally connected to a 5-port switch (in my case too). The USB interface works as an ethernet card in Windows (using proprietary driver). In Linux, the cxacru driver binds to the device but does not work (no wonder - it's doing firmware things in an attempt to bring an ADSL modem up).
I captured a log from Windows (device connect, DHCP and disconnect):
http://www.rainbow-software.org/linux_files/cx82310/cx-run-dhcp.log

Quoted 8 lines

The commands seem to match the enums in cxacru
driver (and go to endpoint 1):
0x84, 0x85, 0x90, 0x91, 0x92, 0x99 (unknown)
Data goes to/from endpoint 2 as ethernet frames (with something at the beginning).
I wonder how to implement support for this device in cxacru driver. Or would be a separate driver better?

Support for this shouldn't really go into the cxacru driver, as that's for an USB ATM interface (it depends on usbatm for actual ATM traffic) not ethernet.

Unfortunately it doesn't look like a trivial task to auto-detect which driver should handle it... your device itself claims to be an "ADSL Modem".

You'd need to know what type of device it was before loading the firmware, which would further complicate auto-detection as some custom firmware may be required that attempts to probe the device and then accepts new firmware. I have no way of testing this on all the types of existing hardware: http://accessrunner.sourceforge.net/modems.shtml

Does it happen to work as an ADSL modem too if you load the right firmware?
d275d0fef591e2233654ea591eccb0d15211eb82 cxacru-fw.bin 624192

There should be some flash memory you could try reading, however it may not contain anything useful.

See "commands for interaction with the flash memory" in cxacru.c and
http://simon.arlott.org/pub/cxacru/raw.c

One possibility is to rewrite the flash to indicate that it's an ethernet class device, or just handle class 255 differently. It would be interesting to know what the windows driver does when the device class is changed. (I don't know which bytes in the flash memory correspond to that value as mine are all 00, hopefully if you can read yours you'll have an FF in that area.)

Ignoring 0572:cb01 class 255 in the cxacru probe function would be an option... but I don't know how many existing users that would affect.

Quoted 103 lines

lsusb output:
Bus 001 Device 003: ID 0572:cb01 Conexant Systems (Rockwell), Inc. GeekADSL Promax Q31 ADSL Modem Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0572 Conexant Systems (Rockwell), Inc.
idProduct 0xcb01 GeekADSL Promax Q31 ADSL Modem
bcdDevice 1.00
  iManufacturer           1 -
  iProduct                2 USB NET CARD
  iSerial                 3 00000060
  bNumConfigurations      1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 80mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 0 (Defined at Interface level)
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN

Quoted 10 lines

bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 4
Device Status: 0x0001
Self Powered

The three versions of the hardware I have are below:

Bus 002 Device 002: ID 0572:cafe Conexant Systems (Rockwell), Inc. AccessRunner ADSL Modem Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0572 Conexant Systems (Rockwell), Inc.
  idProduct          0xcafe AccessRunner ADSL Modem
  bcdDevice            0.01
  iManufacturer           1 -
  iProduct                2 ADSL USB MODEM
  iSerial                 3 28217989
  bNumConfigurations      1

Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 0 (Defined at Interface level)
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 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
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 0x82 EP 2 IN
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 0x02 EP 2 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 0x83 EP 3 IN
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 0x03 EP 3 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 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 200
Device Status: 0x0001
Self Powered

Bus 002 Device 002: ID 0eb0:3457
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0eb0 
  idProduct          0x3457 
  bcdDevice           90.06
  iManufacturer           1 -
  iProduct                2 ADSL USB MODEM
  iSerial                 3 08298061
  bNumConfigurations      1

Bus 002 Device 005: ID 0572:cb00 Conexant Systems (Rockwell), Inc. E-Tech ADSL Modem v2 Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0572 Conexant Systems (Rockwell), Inc.
  idProduct          0xcb00 E-Tech ADSL Modem v2
  bcdDevice            0.01
  iManufacturer           1 -
  iProduct                2 ADSL USB MODEM
  iSerial                 3 08298061
  bNumConfigurations      1

Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 0 (Defined at Interface level)
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 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
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 0x82 EP 2 IN
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 0x02 EP 2 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 0x83 EP 3 IN
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 0x03 EP 3 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 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 200
Device Status: 0x0001
Self Powered

Signature · 1 line

Simon Arlott

Ondrej Zary

author

2010-08-31 22:48 UTC #2 lore raw

Quoted 19 lines · On Wednesday 01 September 2010 00:15:49 Simon Arlott wrote:

Quoted 18 lines · Ondrej Zary
Hello,
I have an ADSL router based on Conexant CX82310 chip. This chip provides both ethernet and USB interfaces. The ethernet interface is often internally connected to a 5-port switch (in my case too). The USB interface works as an ethernet card in Windows (using proprietary driver). In Linux, the cxacru driver binds to the device but does not work (no wonder - it's doing firmware things in an attempt to bring an ADSL modem up).
I captured a log from Windows (device connect, DHCP and disconnect):
http://www.rainbow-software.org/linux_files/cx82310/cx-run-dhcp.log
The commands seem to match the enums in cxacru
driver (and go to endpoint 1):
0x84, 0x85, 0x90, 0x91, 0x92, 0x99 (unknown)
Data goes to/from endpoint 2 as ethernet frames (with something at the beginning).

Quoted 6 lines

Quoted 2 lines
I wonder how to implement support for this device in cxacru driver. Or would be a separate driver better?
Support for this shouldn't really go into the cxacru driver, as that's for an USB ATM interface (it depends on usbatm for actual ATM traffic) not ethernet.

That's what I was afraid of...

Quoted 3 lines

Unfortunately it doesn't look like a trivial task to auto-detect which driver should handle it... your device itself claims to be an "ADSL Modem".

In fact, it does not. The idProduct text is from usb.ids file (which is often incorrect). The device says that it's "USB NET CARD" (iProduct). But I don't know if Linux can match drivers by iProduct string.

Quoted 10 lines

You'd need to know what type of device it was before loading the firmware, which would further complicate auto-detection as some custom firmware may be required that attempts to probe the device and then accepts new firmware. I have no way of testing this on all the types of existing hardware: http://accessrunner.sourceforge.net/modems.shtml
Does it happen to work as an ADSL modem too if you load the right firmware?
d275d0fef591e2233654ea591eccb0d15211eb82 cxacru-fw.bin 624192

Quoted 5 lines

There should be some flash memory you could try reading, however it may not contain anything useful.
See "commands for interaction with the flash memory" in cxacru.c and
http://simon.arlott.org/pub/cxacru/raw.c

Thanks, I'll try that, although I doubt that it will help.

Quoted 9 lines

One possibility is to rewrite the flash to indicate that it's an ethernet class device, or just handle class 255 differently. It would be interesting to know what the windows driver does when the device class is changed. (I don't know which bytes in the flash memory correspond to that value as mine are all 00, hopefully if you can read yours you'll have an FF in that area.)
Ignoring 0572:cb01 class 255 in the cxacru probe function would be an option... but I don't know how many existing users that would affect.

Maybe ignoring the device if class is 255 and iProduct is "USB NET CARD" (or does not contain "MODEM"?).

Quoted 13 lines

Quoted 13 lines
lsusb output:
Bus 001 Device 003: ID 0572:cb01 Conexant Systems (Rockwell), Inc. GeekADSL Promax Q31 ADSL Modem Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0572 Conexant Systems (Rockwell), Inc.
idProduct 0xcb01 GeekADSL Promax Q31 ADSL Modem

This is from usb.ids ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(random string entered by someone on the internet)

Quoted 3 lines

Quoted 3 lines
bcdDevice 1.00
iManufacturer 1 -
iProduct 2 USB NET CARD

This is from the device ^^^^^^^^^^^^

Quoted 417 lines

Quoted 86 lines
iSerial 3 00000060
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 80mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 0 (Defined at Interface level)
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
Quoted 8 lines
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 4
Device Status: 0x0001
Self Powered
The three versions of the hardware I have are below:
Bus 002 Device 002: ID 0572:cafe Conexant Systems (Rockwell), Inc. AccessRunner ADSL Modem Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x0572 Conexant Systems (Rockwell), Inc.
  idProduct          0xcafe AccessRunner ADSL Modem
  bcdDevice            0.01
  iManufacturer           1 -
  iProduct                2 ADSL USB MODEM
  iSerial                 3 28217989
  bNumConfigurations      1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 0 (Defined at Interface level)
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 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
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 0x82 EP 2 IN
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 0x02 EP 2 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 0x83 EP 3 IN
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 0x03 EP 3 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 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 200
Device Status: 0x0001
Self Powered
Bus 002 Device 002: ID 0eb0:3457
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x0eb0
  idProduct          0x3457
  bcdDevice           90.06
  iManufacturer           1 -
  iProduct                2 ADSL USB MODEM
  iSerial                 3 08298061
  bNumConfigurations      1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 0 (Defined at Interface level)
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 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
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 0x82 EP 2 IN
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 0x02 EP 2 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 0x83 EP 3 IN
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 0x03 EP 3 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 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 200
Device Status: 0x0001
Self Powered
Bus 002 Device 005: ID 0572:cb00 Conexant Systems (Rockwell), Inc. E-Tech ADSL Modem v2 Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x0572 Conexant Systems (Rockwell), Inc.
  idProduct          0xcb00 E-Tech ADSL Modem v2
  bcdDevice            0.01
  iManufacturer           1 -
  iProduct                2 ADSL USB MODEM
  iSerial                 3 08298061
  bNumConfigurations      1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 0 (Defined at Interface level)
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 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
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 0x82 EP 2 IN
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 0x02 EP 2 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 0x83 EP 3 IN
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 0x03 EP 3 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 0x84 EP 4 IN

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bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 200
Device Status: 0x0001
Self Powered

All these devices seem to use bDeviceClass 0 and iProduct "ADSL USB MODEM".

Signature · 1 line

Ondrej Zary

Simon Arlott

2010-09-01 06:40 UTC #3 lore raw

Quoted 10 lines · Ondrej Zary

Quoted 9 lines · On Wednesday 01 September 2010 00:15:49 Simon Arlott wrote:
Quoted 8 lines · Ondrej Zary
Hello,
I have an ADSL router based on Conexant CX82310 chip. This chip provides both ethernet and USB interfaces. The ethernet interface is often internally connected to a 5-port switch (in my case too). The USB interface works as an ethernet card in Windows (using proprietary driver). In Linux, the cxacru driver binds to the device but does not work (no wonder - it's doing firmware things in an attempt to bring an ADSL modem up).

If you get the firmware loaded, it may implement an existing protocol for ethernet over USB like all the ATM modems linux supports do.

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I wonder how to implement support for this device in cxacru driver. Or would be a separate driver better?
Support for this shouldn't really go into the cxacru driver, as that's for an USB ATM interface (it depends on usbatm for actual ATM traffic) not ethernet.
That's what I was afraid of...

The firmware loading process is likely to be similar if not identical, but these devices usually don't respond to the status command after loading with the ADSL firmware.

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Unfortunately it doesn't look like a trivial task to auto-detect which driver should handle it... your device itself claims to be an "ADSL Modem".
In fact, it does not. The idProduct text is from usb.ids file (which is often incorrect). The device says that it's "USB NET CARD" (iProduct). But I don't know if Linux can match drivers by iProduct string.

The probe function could ignore it allowing another driver to take it.

Quoted 6 lines

Maybe ignoring the device if class is 255 and iProduct is "USB NET CARD" (or does not contain "MODEM"?).
All these devices seem to use bDeviceClass 0 and iProduct "ADSL USB MODEM".

However, there may be others that don't. I only have three variants of a generic device rebranded... although they don't appear to have a way of replacing that string. Ignoring "USB NET CARD" would be reasonable.

Signature · 1 line

Simon Arlott