Alcor Micro USB Card Reader

["R. G. Newbury" <newbury@xxxxxxxxxxxx>]

I installed an Alcor Micro USB card reader in my desktop machine. lsusb 
reports it as:

Bus 001 Device 003: ID 058f:6362 Alcor Micro Corp. Hi-Speed 21-in-1 
Flash Card Reader/Writer (Internal/External)

Googling produced some pages which imply that this unit is handled by 
the kernel and a module.

I cannot find, anywhere, the name of the module and the unit is unusable.
Help?
Geoff