Bjørn Mork <bjorn@xxxxxxx> writes:
> + * CDC ACM with vendor specific protocol may signify RNDIS or
> + * serial or something else. A number of Huawei devices use
> + * it for serial functions having only 2 endpoints,
Arrgh. Please drop this patch.
I thought I had verified this over and over again for a couple of weeks,
but I do of course discover the problem minutes after posting...
The 2 endpoint assumption is not always true:
$ lsusb -v -d 12d1:1c05
Bus 002 Device 005: ID 12d1:1c05 Huawei Technologies Co., Ltd.
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x12d1 Huawei Technologies Co., Ltd.
idProduct 0x1c05
bcdDevice 1.02
iManufacturer 2
iProduct 1
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 142
bNumInterfaces 3
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 255 Vendor Specific (MSFT RNDIS?)
iInterface 0
CDC Header:
bcdCDC 1.10
CDC ACM:
bmCapabilities 0x03
line coding and serial state
get/set/clear comm features
Bjørn
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