K 10
svn:author
V 3
sam
K 8
svn:date
V 27
2009-02-25T00:58:08.323231Z
K 7
svn:log
V 1204
Checkpoint support for the optional GPS chip:
o the Trimble part has a TL16C752B uart through which NMEA data
  comes; add it to the config+hints (rclk 1843200)
o map the i/o region associated with the uart
o rewrite the ixp bus memory resource allocation to handle two uarts
  with different bus tag requirements (need to completely rewrite this
  stuff to hide the A4 crap and/or overhaul uart to eliminate the need
  for the A4 hack)
o add a rwdelay parameter/hack to uart to handle TL16C752B brain-damage:
  back-to-back read/writes must have a min 2usec delay between or data
  will be corrupted (again this would be better hidden behind bus space
  hacks but uart needs re-architecting); thanks to Chris Lang for the tip
o force GPIO pin 3 irq to be output+edge-rising (yet another hack as we
  need to redesign how bus_setup_intr works so we can handle this stuff
  in one spot instead of in every driver)
o add a ddb "show gpio" command to dump GPIO configuration
o add a temporary ddb "show istat" command to dump uart stats+registers

The GPS part seems to work but the host is hammered by interrupts on
GPIO 3; still trying to figure out why.

Sponsored by:	Gateworks (2358 board w/ GPS chip)

END