NetBSD/sys/dev/isa
thorpej 5322570d8a - Move all of the configurable parameters (alloc_iobase, alloc_iosize,
intr_alloc_mask) into one place, comment them, and defopt them.
- Rename pcic_intr_alloc_mask to pcic_isa_intr_alloc_mask, since it's
  an ISA-specific thing.
- When allocating/establishing the PCIC's interrupt (for card events),
  do error checking, and pay attention to the intr_alloc_mask.
1997-10-29 22:48:43 +00:00
..
README.seagate Commit this, though it really does need work. 1994-11-03 16:55:57 +00:00
ad1848.c Make the audio API (almost) SunOS compatible. 1997-10-19 07:41:33 +00:00
ad1848var.h Make the audio API (almost) SunOS compatible. 1997-10-19 07:41:33 +00:00
aha_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
aic_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
ast.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
bha_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
boca.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
com_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
com_multi.c Adjust for the new "com" driver home. 1997-10-16 00:29:28 +00:00
com_multi.h New version of com driver. Uses a different queueing mechanism and a split 1997-04-04 20:56:34 +00:00
cs4231var.h Fix tipo inherited from old version of TNF copyright template. 1997-10-09 07:57:17 +00:00
cy_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
elink.c New bus.h implementation/interface: 1996-10-21 22:34:38 +00:00
elink.h New bus.h implementation/interface: 1996-10-21 22:34:38 +00:00
esp_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
espvar.h Add NetBSD RCS IDs. 1997-05-18 06:08:02 +00:00
files.isa Garbage-collect "com" device declaration. 1997-10-16 00:47:23 +00:00
gus.c Make the audio API (almost) SunOS compatible. 1997-10-19 07:41:33 +00:00
gusreg.h Fix tipo inherited from old version of TNF copyright template. 1997-10-09 07:57:17 +00:00
i82365_isa.c - Move all of the configurable parameters (alloc_iobase, alloc_iosize, 1997-10-29 22:48:43 +00:00
ics2101.c Fix tipo inherited from old version of TNF copyright template. 1997-10-09 07:57:17 +00:00
ics2101var.h Fix tipo inherited from old version of TNF copyright template. 1997-10-09 07:57:17 +00:00
if_ate.c Add and/or update rnd_*() hooks 1997-10-15 05:55:13 +00:00
if_ed.c Make sure the i/o and/or mem addresses aren't wildcarded (i.e. -1) before 1997-10-19 18:56:39 +00:00
if_edreg.h Pulldown from marc-pcmcia branch: garbage-collect NE2000 support from 1997-10-14 23:04:19 +00:00
if_eg.c Make sure the i/o and/or mem addresses aren't wildcarded (i.e. -1) before 1997-10-19 18:56:39 +00:00
if_egreg.h Stylistic changes. 1995-07-23 21:14:31 +00:00
if_el.c Add and/or update rnd_*() hooks 1997-10-15 05:55:13 +00:00
if_elreg.h new RCS ID format. 1994-10-27 04:14:23 +00:00
if_ep_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
if_fe.c Add and/or update rnd_*() hooks 1997-10-15 05:55:13 +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 Add and/or update rnd_*() hooks 1997-10-15 05:55:13 +00:00
if_hp.c Add and/or update rnd_*() hooks 1997-10-15 05:55:13 +00:00
if_ie.c Add and/or update rnd_*() hooks 1997-10-15 05:55:13 +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 Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
if_lc_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
if_le_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
if_levar.h If we select a 32k window on the DEPCA, make sure to switch to the lower 32k 1997-09-10 03:05:39 +00:00
if_ne_isa.c Use symbolic names for default locator values. 1997-10-19 09:05:04 +00:00
isa.c XXX Add a drq2 locator for the ISA bus. Many sound cards need 1997-08-26 19:26:38 +00:00
isadma.c Enable use of bus_dmamem_mmap(). 1997-09-05 01:48:33 +00:00
isadmareg.h Pull thorpej-bus-dma branch into mainline. 1997-06-06 23:43:45 +00:00
isadmavar.h Implement a function to test if a drq is taken and use it 1997-08-04 22:13:32 +00:00
isareg.h clean up several ISA device interfaces: autoconfiguration, header 1995-04-17 12:06:30 +00:00
isavar.h add bebox 1997-10-14 07:15:45 +00:00
lpt_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
madreg.h Audio changes: 1997-07-31 22:33:08 +00:00
mcd.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
mcdreg.h Busify the driver (from perry). 1997-04-04 18:59:35 +00:00
pas.c Make the audio API (almost) SunOS compatible. 1997-10-19 07:41:33 +00:00
pasreg.h Add support for PAS 16 basic 1995-03-15 18:45:58 +00:00
pss.c Make the audio API (almost) SunOS compatible. 1997-10-19 07:41:33 +00:00
pssreg.h Remove strings 1995-05-08 22:01:34 +00:00
rtfps.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
satlink.c Use symbolic names for default locator values. 1997-10-19 09:05:04 +00:00
satlinkio.h Fix tipo inherited from old version of TNF copyright template. 1997-10-09 07:57:17 +00:00
satlinkreg.h Fix tipo inherited from old version of TNF copyright template. 1997-10-09 07:57:17 +00:00
sb.c Make the audio API (almost) SunOS compatible. 1997-10-19 07:41:33 +00:00
sb_isa.c Zap drq2 if unused. 1997-08-28 00:02:12 +00:00
sbdsp.c Make the audio API (almost) SunOS compatible. 1997-10-19 07:41:33 +00:00
sbdspvar.h Make the audio API (almost) SunOS compatible. 1997-10-19 07:41:33 +00:00
sbreg.h Give names to some more mixer registers. 1997-08-24 23:24:51 +00:00
sbvar.h - convert to bus_space_* 1997-01-16 21:03:30 +00:00
seagate.c Merge scsipi branch in the mainline. This add support for ATAPI devices 1997-08-27 11:22:52 +00:00
uha_isa.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +00:00
wd.c o Make usage of /dev/random dependant on 1997-10-13 00:46:08 +00:00
wdc.c Changes to the probe and attach routine: 1997-10-27 14:09:23 +00:00
wdlink.h Add a map to wdc_softc to track the already known devices to prevent them to 1997-09-03 07:57:51 +00:00
wdreg.h Merge scsipi branch in the mainline. This add support for ATAPI devices 1997-08-27 11:22:52 +00:00
wds.c When creating ccbs, be a little more informative about why we couldn't 1997-10-29 00:30:00 +00:00
wdsreg.h Make `hashkey' unsigned. 1997-09-09 18:56:15 +00:00
wss.c Make the audio API (almost) SunOS compatible. 1997-10-19 07:41:33 +00:00
wssreg.h normalize off-by-four ad1848 register offsets. 1997-03-19 06:45:21 +00:00
wt.c Don't panic if we fail to remap i/o or mem space in the attach function. 1997-10-20 18:43:03 +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.