NetBSD/sys/dev/isa
is 95f41d24cc Add "iy" driver for Ethernet ISA boards using the Intel i82595 chip, e.g.
(and only tested on) Intel Etherexpress PRO. Should work on any i82595 ISA
board which uses an EEPROM for config information; NETBLKID not yet supported.
TODO: change to BUS interface, add multicast support.
1996-05-06 21:36:51 +00:00
..
README.seagate Commit this, though it really does need work. 1994-11-03 16:55:57 +00:00
ad1848.c - prototype fixes 1996-04-29 20:02:32 +00:00
ad1848var.h - prototype fixes 1996-04-29 20:02:32 +00:00
aha.c Fix a trivial typo. 1996-05-05 00:40:01 +00:00
aha284x.c update for addition of a machine-dependent cookie as the first argument 1996-04-11 22:27:59 +00:00
ahareg.h - prototype fixes 1996-04-29 20:02:32 +00:00
aic6360.c - prototype fixes 1996-04-29 20:02:32 +00:00
ast.c Make those compile again; they were missing a declaration for bc. 1996-05-05 19:49:51 +00:00
boca.c Make those compile again; they were missing a declaration for bc. 1996-05-05 19:49:51 +00:00
bt.c - prototype fixes 1996-04-29 20:02:32 +00:00
btreg.h - prototype fixes 1996-04-29 20:02:32 +00:00
com.c Move comintr() prototype to comvar.h; needed by the multi-port cards. 1996-05-05 19:50:44 +00:00
comreg.h Document this file better, mostly from John Vinopal 1996-02-05 23:01:50 +00:00
comvar.h Move comintr() prototype to comvar.h; needed by the multi-port cards. 1996-05-05 19:50:44 +00:00
cs4231var.h Fix error in copyright notice 1996-02-05 02:18:48 +00:00
cy.c note that most of dev/ic's contents have changed names 1995-06-28 04:30:30 +00:00
elink.c - Fix random return value in the probe function. 1996-05-03 19:06:25 +00:00
elink.h Adapt the elink_reset() and elink_idseq() routines for <machine/bus.h>. 1996-04-30 22:16:27 +00:00
files.isa Add "iy" driver for Ethernet ISA boards using the Intel i82595 chip, e.g. 1996-05-06 21:36:51 +00:00
gus.c make it work with GUSPLAYDEBUG defined 1996-05-03 22:35:24 +00:00
gusreg.h Fix error in copyright notice 1996-02-05 02:18:48 +00:00
ics2101.c - prototype fixes 1996-04-29 20:02:32 +00:00
ics2101var.h Fix error in copyright notice 1996-02-05 02:18:48 +00:00
if_ate.c update for addition of a machine-dependent cookie as the first argument 1996-04-11 22:27:59 +00:00
if_ed.c Fix a bug I introduced when converting the driver to <machine/bus.h>. 1996-05-05 01:28:52 +00:00
if_edreg.h Imported from OpenBSD/FreeBSD: 1996-01-10 16:49:22 +00:00
if_eg.c update for addition of a machine-dependent cookie as the first argument 1996-04-11 22:27:59 +00:00
if_egreg.h Stylistic changes. 1995-07-23 21:14:31 +00:00
if_el.c - prototype fixes 1996-04-29 20:02:32 +00:00
if_elreg.h new RCS ID format. 1994-10-27 04:14:23 +00:00
if_ep_isa.c - Fix random return value in the probe function. 1996-05-03 19:06:25 +00:00
if_fe.c update for addition of a machine-dependent cookie as the first argument 1996-04-11 22:27:59 +00:00
if_fereg.h Add Masahiro SEKIGUCHI's MB8696[05] driver, ported, with some additional 1995-05-01 02:47:07 +00:00
if_fmv.c update for addition of a machine-dependent cookie as the first argument 1996-04-11 22:27:59 +00:00
if_hp.c The IST_* and IPL_* constants are not bus-specific; don't treat them as such. 1995-12-24 02:29:35 +00:00
if_ie.c Update the 3c507 probe to the new interfaces used by elink_reset() 1996-04-30 22:21:54 +00:00
if_ie507.h Various changes from Rafal Boni to improve performance and reliability. Also, 1995-01-23 04:50:08 +00:00
if_ieatt.h new RCS ID format. 1994-10-27 04:14:23 +00:00
if_iee16.h Etherexpress-16 driver collision by Andrew Gillham <gillham@Digitron.COM>. 1995-09-14 12:41:32 +00:00
if_iy.c Add "iy" driver for Ethernet ISA boards using the Intel i82595 chip, e.g. 1996-05-06 21:36:51 +00:00
if_le.c Add a hardware dependent initialization function lehwinit() 1996-04-22 02:53:28 +00:00
if_levar.h - prototype fixes 1996-04-29 20:02:32 +00:00
isa.c Map port 0x84 (which is used to generate a 2.6us delay) in isaattach(). 1996-05-05 01:14:07 +00:00
isadma.c - prototype fixes 1996-04-29 20:02:32 +00:00
isadmareg.h note that most of dev/ic's contents have changed names 1995-06-28 04:30:30 +00:00
isadmavar.h Add support to the ISA DMA framework for auto-initialize mode. 1996-03-01 04:08:13 +00:00
isareg.h clean up several ISA device interfaces: autoconfiguration, header 1995-04-17 12:06:30 +00:00
isavar.h Map port 0x84 (which is used to generate a 2.6us delay) in isaattach(). 1996-05-05 01:14:07 +00:00
lpt.c - Fix gcc -Wall warnings 1996-04-29 20:30:48 +00:00
lpt_isa.c - Fix gcc -Wall warnings 1996-04-29 20:30:48 +00:00
lptreg.h new RCS ID format. 1994-10-27 04:14:23 +00:00
mcd.c Fix gcc -Wall warnings. 1996-04-29 20:28:40 +00:00
mcdreg.h fix from Onno van der Linden for large-file read timeouts on double-speed 1995-07-10 01:27:24 +00:00
pas.c - prototype fixes 1996-04-29 20:02:32 +00:00
pasreg.h Add support for PAS 16 basic 1995-03-15 18:45:58 +00:00
pss.c - prototype fixes 1996-04-29 20:00:39 +00:00
pssreg.h Remove strings 1995-05-08 22:01:34 +00:00
rtfps.c Make those compile again; they were missing a declaration for bc. 1996-05-05 19:49:51 +00:00
sb.c - prototype fixes 1996-04-29 20:02:32 +00:00
sbdsp.c - prototype fixes 1996-04-29 20:02:32 +00:00
sbdspvar.h Fix gcc -Wall warnings. 1996-04-29 20:28:40 +00:00
sbreg.h add MediaVision Jazz16 chipset support. It must be configured with 1996-03-16 04:00:09 +00:00
seagate.c Fix gcc -Wall warnings. 1996-04-29 20:28:40 +00:00
ultra14f.c - gcc -Wall fixes 1996-04-29 19:50:47 +00:00
wd.c - gcc -Wall fixes 1996-04-29 19:50:47 +00:00
wdreg.h KERNEL -> _KERNEL. 1995-03-29 21:56:46 +00:00
wds.c Fix a trivial typo. 1996-05-05 00:40:01 +00:00
wdsreg.h Working WD7000 and TMC-7000 driver, from Julian Highfield, with additional work by me. 1996-03-29 20:53:30 +00:00
wss.c Prototype fixes 1996-04-29 19:45:32 +00:00
wssreg.h Setup irq correctly (PR#1179) 1995-07-07 02:15:12 +00:00
wt.c Prototype fixes 1996-04-29 19:45:32 +00:00
wtreg.h new RCS ID format. 1994-10-27 04:14:23 +00:00

README.seagate

The hardware:

The ST01/02, and Future Domain 950 are very simple SCSI controllers. They are
not busmastering, so the processor must do all transfers a la IDE. They support
blind transfer by adding wait states (up to a certain limit). Interrupt is
generated for reconnect and parity errors (maybe also for some other events).

The card consists of one command port that writes to scsi control lines, reads
status lines, and a data port that read/writes to the 8 data lines. The address
decoding gives both data and control ports large memory areas to a single
port. This is used by the code.

The ST01/02 differs from the FD950 in memory address location and SCSI id.

Probing for the card:

A card is recognized by comparing the BIOS signature with known signatures. A
new card may not be recognized if the BIOS signature has changed. Please send
new signatures to me.

Driver function:

A scsi command is sent to scsi_cmd function. The command is either placed in
the queue or an retryable message is returned. The routine may wait for
completion of the command depending on the supplied flags. A timer is started
for every command placed in the queue. The commands are added in the order they
are received. There is a possiblity to make all REQUEST SENSE commands be
queued before all other commands, but I dont think it is a good thing (Linux
do however use this). 

The card is mostly controlled by the sea_main function. It is called by
scsi_cmd, the interrupt routine, and the timeout routine. The sea_main routine
runs as long there are something to do (transfer data, issue queued commands,
and handle reconnected commands).

The data transfers may be done in two different ways: Blind and polled
transfers. They differ in the way the driver does it handshaking with the
target. During a blind transfer, the driver code blindly transfers a block
of data without checking for changed phase. During polled transfers, the
phase is checked between every character transfered. The polled transfers
are always used for status information and command transfers.

Because the card does not use dma in any way, there is no need to handle
physical addresses. There is no problem with the isa-bus address limit of
16MB, making bounce-buffers unnecessary.

The data structures:

Every card has a sea_softc structure keeping the queues of commands waiting to
be issued, and commands currently disconnected. The type of card (Seagate or
Future Domain), data and control port addresses, scsi id, busy flags for all
possible targets, and interrupt vector for the card.

Every scsi command to be issued are stored in a sea_scb structure. It contains
a flag describing status/error of the command, current data buffer position,
and number of bytes remaining to be transfered.


PROBLEMS

I have had problems getting the ST02 boot using the boot floppies. I think it
is some problem with BIOS calls not working. It is unfortunately impossible to
disconnect the ST02 floppy controller.

I have had problem to get the driver talk to a 40 MB Seagate disk. I dont have
access to it any more, so I can't do any more checks on that.

NOTE: The ST02 creates its own description of the disk attached. This is not
the same as the disk says. This translation problem may cause problems when
sharing a disk between both DOS and BSD. It is however not impossible.