here's a question for the usb core people;
how does one defer the probing of one usb interface until another usb
interface on the same device has already been probed/
as an example, take a look at the wireless usb / uwb code. in
drivers/usb/host/hwa-hc.c . hwahc-create [called from hwahc-probe]
dies if it cannot find an uwb-rc structure in its grandparent. this
uwb-rc structure is created in drivers/uwb/ the problem is, that the
uwb-rc structure should always be created before the hwa-hc is probed.
in reality, in almost never is [with my hardware in any case] so
module autoloading always fails. the uwb-rc structure is created in
drivers/uwb/hwa-rc.c [hwarc-probe].
so far i've tried relinquishing control in hwahc-create [using
schedule] and waiting for some number of tried, but that does not
work. i also tried inserting and exporting a dummy function in
hwa-rc.ko, which would be called from probe in hwa-hc.ko, which would
correct the module dependency, but that did not work either.
does this have anything to do with the 'needs_binding' or
'needs_altsetting0' flags/
the output of lsusb is below, for reference [the unrecognized bit is
the wire-adapter interface descriptor].
cheers,
c
ps; please excuse my lack of capital letters and various other proper
punctuation - the vmware player has decided to remap the keyboard of
my host system and i can't use the shift anymore, among other things.
us 005 Device 015: ID 13cf:1200 Wisair Ltd.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 2 Wire Adapter Multifunction Peripheral
bMaxPacketSize0 64
idVendor 0x13cf Wisair Ltd.
idProduct 0x1200
bcdDevice 1.00
iManufacturer 2
iProduct 1 Wireless USB Dongle
iSerial 3 123456789
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 83
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Security Descriptor:
bLength 5
bDescriptorType 12
wTotalLength 10
bNumEncryptionTypes 1
Encryption Type Descriptor:
bLength 5
bDescriptorType 14
bEncryptionType 2 UNSECURE
bEncryptionValue 1
bAuthKeyIndex 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 224 Wireless
bInterfaceSubClass 2 Wireless USB Wire Adapter
bInterfaceProtocol 1 Host Wire Adapter Control/Data Streaming
iInterface 0
** UNRECOGNIZED: 0e 21 00 01 05 00 10 00 10 02 0d 00 0a 00
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 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 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 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 2 Ultra WideBand Radio Control
iInterface 0
Radio Control Interface Class Descriptor:
bLength 4
bDescriptorType 35
bcdRCIVersion 1.00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 2 Wire Adapter Multifunction Peripheral
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
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