Man page 9 : ata_mode_string

ata_mode_string - convert xfer_mask to string

const char * ata_mode_string(unsigned long  xfer_mask );

xfer_mask
    mask of bits supported; only highest bit counts.

Determine string which represents the highest speed (highest bit in modemask).

None.

Constant C string representing highest speed listed in mode_mask, or the constant C string « <n/a> ».

Jeff Garzik
    Author.