Commit Graph

6 Commits

Author SHA1 Message Date
Justin T. Gibbs
41c47eee15 Simplify my copyright license terms.
aic7xxx.c:
	Add a function for sucking firmware out of the controller
	prior to reset.

	Remove some inline bloat from functions that should not have
	been inlined.

	During initialization, wait 1ms after the chip reset before
	touching any registers.  You can get machine checks on certain
	architectures (Atari I think?) without the delay.

	Return CAM_REQ_CMP for external BDR requests instead
	of CAM_BDR_SENT.

	Bump some messages to bootverbose levels above 1.

	Don't clear any negotiated sync rate if the target rejects
	a WDTR message.  The sync rate is only cleared if the target
	accepts a WDTR message.

	Fix a small bug in the mesgin handling code that could cause
	us to believe that we had recieved a message that was actually
	received by another target.  This could only confuse us in
	some very rare transmission negotiation scenarios.

	Remove some unecessary cleanup of residual information after
	a residual is reported.  The sequencer does this when the
	command is queued now.
1999-12-06 18:23:31 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Justin T. Gibbs
3bafc9d432 Massive overhaul of the aic7xxx driver:
- Convert to CAM
 - Use a new DMA based queuing and paging scheme
 - Add preliminary target mode support
 - Add support for the aic789X chips
 - Take advantage of external SRAM on more controllers.
 - Numerous bug fixes and performance improvements.
1998-09-15 07:24:17 +00:00
Justin T. Gibbs
37507c1bd2 Add support to aicasm for "downloaded constants". These are immediate
operands that are set during seqeuncer program download instead of at
assembly time.

Convert the sequencer code to use" downloaded constants" for four run time
constants that vary depending on the board type.  This frees up 4 bytes
of sequencer scratch ram space where these constants used to be stored and
also removes the additional instructions required to load their values
into the accumulator prior to using them.

Remove the REJBYTE sram variable.  The host driver can just as easly
read the accumulator to get this value.

The scratch ram savings is important as the old code used to clober the
SCSICONF register on 274X cards which sits near the top of scratch ram
space.  The SCSICONF register controls bus termination, and clobbering
it is not a good thing.  Now we have 4 bytes to spare.

This should fix the reported problems with cards that don't have devices
attached to them failing with a stream of "Somone reset bus X" messages.

Doug Ledford determined the cause of the problem, fixes by me.
1997-09-27 19:37:31 +00:00
Justin T. Gibbs
f68f348b20 Modify my copyright notice to allow the sequencer to be used with GPLed
software (aka Linux).

Fix a few bugs in the sequencer assembler.

Make it easy to compiler the assembler with debugging turned on.
1997-06-27 19:38:56 +00:00
Justin T. Gibbs
c5cb388883 Makefile gram.y scan.l sequencer.h symbol.c symbol.h aic7xxx_asm.c:
New sequencer assembler for the aic7xxx adapters.  This assembler
	performs some amount of register type checking, allows bit
	manipulation of symbolic constants, and generates "patch tables"
	for conditionalized downloading of portions of the program.
	This makes it easier to take full advantage of the different
	features of the aic7xxx cards without imposing run time penalies
	or being bound to the small memory footprints of the low end
	cards for features like target mode.

aic7xxx.reg:
	New, assembler parsed, register definitions fo the aic7xxx cards.
	This was done primarily in anticipation of 7810 support which
	will have a different register layout, but should be able to use
	the same assembler.  The kernel aic7xxx driver consumes a generated
	file in the compile directory to get the definitions of the register
	locations.

aic7xxx.seq:
	Convert to the slighly different syntax of the new assembler.

	Conditionalize SCB_PAGING, ultra, and twin features which shaves
	quite a bit of space once the program is downloaded.

	Add code to leave the selection hardware enabled during reconnects
	that win bus arbitration.  This ensures that we will rearbitrate
	as soon as the bus goes free instead of delaying for a bit.

	When we expect the bus to go free, perform all of the cleanup
	associated with that event "up front" and enter a loop awaiting
	bus free.  If we see a REQ first, complain, but attempt to
	continue.  This will hopefully address, or at least help diagnose,
	the "target didn't send identify" messages that have been reported.

Spelling corrections obtained from NetBSD.
1997-03-16 07:08:19 +00:00