Introduce wdc_output_bytes and wdc_input_bytes to remove replicated PIO logic

Fix wdc_select_drive to no longer wait for free channel (not strictly correct
but we couldn't handle a non-free channel anyway)
Major changes to the ATAPI interrupt logic to reduce reliance on the drive
setting the bits correctly. Deal with situation that we get length = 0 back
from the drive on transfer (instead of potentially looping forever).

Timeout in drive setup should not cause the drive to downgrade modes.

0 files changed, 0 insertions, 0 deletions