[Skiboot] [PATCH V2 0/5] BT Improvements

[Cyril Bur]

Tested this on current AMI firmware and boots the host past petitboot
without issue.

The first two patches are cleanups and improve debugging output which was
difficult to work with. No functional change.

The third patch simplifies by removing the state machine.

The fourth patch puts all 0xff in the fifo when a response to a message
skiboot doesn't know about arrives, this will hopefully save a double send
of a valid request and help to catch this situation in debugging as all
0xff will be easy to spot.

The fifth patch asks the BMC for its BT capabilities. It should be noted
here that AMI firmware responds with an error to this message which means
we fall back to default values, the same values we've always been using.

V2:
  Cleanups from Alistairs comments.
  Added clear the write buffer when clearing the fifo

Cyril Bur (5):
  hw/bt: Improve debug printing
  hw/bt: Convert retry_count to send_count
  hw/bt: Remove state machine and use only B2H_ATN and H2B_ATN.
  hw/bt: Clear the fifo when an unknown response is received
  hw/bt: Ask the BMC for its BT interface capabilities

 hw/bt.c        | 209 ++++++++++++++++++++++++++++++++++++++++++++-------------
 include/ipmi.h |   1 +
 2 files changed, 164 insertions(+), 46 deletions(-)

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2.6.2