man ata_timing_cycle2mode (9): find xfer mode for the specified cycle duration

SYNOPSIS

u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);

ARGUMENTS

xfer_shift

: ATA_SHIFT_* value for transfer type to examine.

cycle

: cycle duration in ns

DESCRIPTION

Return matching xfer mode for cycle. The returned mode is of the transfer type specified by xfer_shift. If cycle is too slow for xfer_shift, 0xff is returned. If cycle is faster than the fastest known mode, the fasted mode is returned.

LOCKING

None.

RETURNS

Matching xfer_mode, 0xff if no match found.

AUTHOR

Jeff Garzik

: Author.