freebsd-dev/sys/i386/isa/aic7770.c
Justin T. Gibbs 6b172e59a6 First pass cleanup of this driver. This pass does not include the sequencer
optimizations I have been working on yet, but does bring in some bug fixes
and performance improvments that were easy to regression test:

Setup the data fifo threshold and bus off timing correctly for 27/284x cards.
Users of these adapters with fast periferals (greater than 5MB/s) will notice
a big performance difference. (Sometimes as large as going from 3.7->8.3MB/s).

Fix handling of the active target flags.  Some of the outbs where missing
the base offset in the abort code.  The abort code still needs lots of work.

Support 3940 controllers, but only with 16 SCBs for now.  Eventually I'll
add support for all 255, but I need to find a tester for the code first since
we have to enable the cards external SRAM to do this.

Add Dan Eischen's serial eeprom reading facilities.  This allows the 2940
adapters to pull additional information left over from SCSI-Select right out
out of the configuration seeprom.

If the BIOS is disabled on 274x controllers, reset all target parameters
to there defaults since you can't rely on what is stored in scratch ram.

Report motherboard controllers as such.

Stick the first SG address and count into the SCB data and count areas for
all transfers in preparation of a later sequencer optimization.

Keep track of which targets can are allowed to have the disconnection
priveledge since this will be handled by the kernel driver in the future.

If a target issues a message reject in response to a tagged message,
disable tagged queuing for that target.  Some seagates say they can do
tagged queuing, but lie, and its a shame to have to disable tagged queuing
on all devices just because you have one that can't cope.
1995-07-04 21:14:45 +00:00

155 lines
4.6 KiB
C

/*
* Product specific probe and attach routines for:
* 27/284X and aic7770 motherboard SCSI controllers
*
* Copyright (c) 1995 Justin T. Gibbs
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice immediately at the beginning of the file, without modification,
* this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Absolutely no warranty of function or purpose is made by the author
* Justin T. Gibbs.
* 4. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: aic7770.c,v 1.14 1995/05/30 08:01:15 rgrimes Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <sys/devconf.h>
#include <machine/cpufunc.h>
#include <i386/scsi/aic7xxx.h>
int aic7770probe __P((struct isa_device *dev));
int aic7770_attach __P((struct isa_device *dev));
/*
* Standard EISA Host ID regs (Offset from slot base)
*/
#define HID0 0xC80 /* 0,1: msb of ID2, 2-7: ID1 */
#define HID1 0xC81 /* 0-4: ID3, 5-7: LSB ID2 */
#define HID2 0xC82 /* product */
#define HID3 0xC83 /* firmware revision */
#define CHAR1(B1,B2) (((B1>>2) & 0x1F) | '@')
#define CHAR2(B1,B2) (((B1<<3) & 0x18) | ((B2>>5) & 0x7)|'@')
#define CHAR3(B1,B2) ((B2 & 0x1F) | '@')
#define EISA_MAX_SLOTS 16 /* XXX should be defined in a common header */
static ahc_slot = 0; /* slot last board was found in */
struct isa_driver ahcdriver = {aic7770probe, aic7770_attach, "ahc"};
typedef struct
{
ahc_type type;
unsigned char id; /* The Last EISA Host ID reg */
} aic7770_sig;
static struct kern_devconf kdc_aic7770[NAHC] = { {
0, 0, 0, /* filled in by dev_attach */
"ahc", 0, { MDDT_ISA, 0, "bio" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
&kdc_isa0, /* parent */
0, /* parentdata */
DC_UNCONFIGURED, /* always start out here */
"Adaptec aic7770 based SCSI host adapter",
DC_CLS_MISC /* host adapters aren't special */
} };
static inline void
aic7770_registerdev(struct isa_device *id)
{
if(id->id_unit)
kdc_aic7770[id->id_unit] = kdc_aic7770[0];
kdc_aic7770[id->id_unit].kdc_unit = id->id_unit;
kdc_aic7770[id->id_unit].kdc_parentdata = id;
dev_attach(&kdc_aic7770[id->id_unit]);
}
int
aic7770probe(struct isa_device *dev)
{
u_long port;
int i;
u_char sig_id[4];
aic7770_sig valid_ids[] = {
/* Entries of other tested adaptors should be added here */
{ AHC_274, 0x71 }, /*274x*/
{ AHC_AIC7770, 0x70 }, /*aic7770 on Motherboard*/
{ AHC_284, 0x56 }, /*284x, BIOS enabled*/
{ AHC_284, 0x57 } /*284x, BIOS disabled*/
};
ahc_slot++;
while (ahc_slot < EISA_MAX_SLOTS) {
port = 0x1000 * ahc_slot;
for( i = 0; i < sizeof(sig_id); i++ )
{
/*
* An outb is required to prime these registers on
* VL cards
*/
outb( port + HID0, HID0 + i );
sig_id[i] = inb(port + HID0 + i);
}
if (sig_id[0] == 0xff) {
ahc_slot++;
continue;
}
/* Check manufacturer's ID. */
if ((CHAR1(sig_id[0], sig_id[1]) == 'A')
&& (CHAR2(sig_id[0], sig_id[1]) == 'D')
&& (CHAR3(sig_id[0], sig_id[1]) == 'P')
&& (sig_id[2] == 0x77)) {
for(i=0; i < sizeof(valid_ids)/sizeof(aic7770_sig);i++)
if ( sig_id[3] == valid_ids[i].id ) {
int unit = dev->id_unit;
dev->id_iobase = port;
#ifndef DEV_LKM
aic7770_registerdev(dev);
#endif /* DEV_LKM */
if(ahcprobe(unit, port,
valid_ids[i].type)){
/*
* If it's there, put in it's
* interrupt vectors
*/
dev->id_irq = (1 <<
ahcdata[unit]->vect);
dev->id_drq = -1; /* EISA dma */
ahc_unit++;
return IO_EISASIZE;
}
}
}
ahc_slot++;
}
return 0;
}
int
aic7770_attach(dev)
struct isa_device *dev;
{
int unit = dev->id_unit;
kdc_aic7770[unit].kdc_state = DC_BUSY; /* host adapters always busy */
return ahc_attach(unit);
}