Somewhat useful debugging messages are available. The choice of
messages is controlled by a bitmap. This may be specified as a
module argument. See the file <file:drivers/atm/idt77252.h> for
the meanings of the bits in the mask.

When active, these messages can have a significant impact on the
speed of the driver, and the size of your syslog files! When
inactive, they will have only a modest impact on performance.