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freebsd-nq/sys/pci/aic7870.c
Justin T. Gibbs c5753242cf The long awaited stability patch set for the aic7xxx driver: 
Simplify the initialization of adapters by pulling all card specific
initialization to the card specific modules.

Set the Latency timer and Burst len to good values if thery are not
initialized during post or are reset during chip reset.

Properly identify and handle external SCB SRAM.  The code was false
id'ing 255 SCBs on aic7880 chips.

Reviewed by:   David Greenman <davidg@FreeBSd.org>
1996-01-03 06:34:10 +00:00

564 lines
14 KiB
C
Raw Blame History

/*
* Product specific probe and attach routines for:
* 3940, 2940, aic7870, and aic7850 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: aic7870.c,v 1.20 1995/12/14 09:53:55 phk Exp $
*/
#include <pci.h>
#if NPCI > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#include <machine/clock.h>
#include <i386/scsi/aic7xxx.h>
#include <i386/scsi/93cx6.h>
#include <dev/aic7xxx/aic7xxx_reg.h>
#define PCI_BASEADR0 PCI_MAP_REG_START
#define PCI_DEVICE_ID_ADAPTEC_3940U 0x82789004ul
#define PCI_DEVICE_ID_ADAPTEC_2944U 0x84789004ul
#define PCI_DEVICE_ID_ADAPTEC_2940U 0x81789004ul
#define PCI_DEVICE_ID_ADAPTEC_3940 0x72789004ul
#define PCI_DEVICE_ID_ADAPTEC_2944 0x74789004ul
#define PCI_DEVICE_ID_ADAPTEC_2940 0x71789004ul
#define PCI_DEVICE_ID_ADAPTEC_AIC7880 0x80789004ul
#define PCI_DEVICE_ID_ADAPTEC_AIC7870 0x70789004ul
#define PCI_DEVICE_ID_ADAPTEC_AIC7850 0x50789004ul
#define DEVCONFIG 0x40
#define MPORTMODE 0x00000400ul /* aic7870 only */
#define RAMPSM 0x00000200ul /* aic7870 only */
#define VOLSENSE 0x00000100ul
#define SCBRAMSEL 0x00000080ul
#define MRDCEN 0x00000040ul
#define EXTSCBTIME 0x00000020ul /* aic7870 only */
#define EXTSCBPEN 0x00000010ul /* aic7870 only */
#define BERREN 0x00000008ul
#define DACEN 0x00000004ul
#define STPWLEVEL 0x00000002ul
#define DIFACTNEGEN 0x00000001ul /* aic7870 only */
#define CSIZE_LATTIME 0x0c
#define CACHESIZE 0x0000003ful /* only 5 bits */
#define LATTIME 0x0000ff00ul
/*
* Define the format of the aic78X0 SEEPROM registers (16 bits).
*
*/
struct seeprom_config {
/*
* SCSI ID Configuration Flags
*/
#define CFXFER 0x0007 /* synchronous transfer rate */
#define CFSYNCH 0x0008 /* enable synchronous transfer */
#define CFDISC 0x0010 /* enable disconnection */
#define CFWIDEB 0x0020 /* wide bus device */
/* UNUSED 0x00C0 */
#define CFSTART 0x0100 /* send start unit SCSI command */
#define CFINCBIOS 0x0200 /* include in BIOS scan */
#define CFRNFOUND 0x0400 /* report even if not found */
/* UNUSED 0xf800 */
unsigned short device_flags[16]; /* words 0-15 */
/*
* BIOS Control Bits
*/
#define CFSUPREM 0x0001 /* support all removeable drives */
#define CFSUPREMB 0x0002 /* support removeable drives for boot only */
#define CFBIOSEN 0x0004 /* BIOS enabled */
/* UNUSED 0x0008 */
#define CFSM2DRV 0x0010 /* support more than two drives */
/* UNUSED 0x0060 */
#define CFEXTEND 0x0080 /* extended translation enabled */
/* UNUSED 0xff00 */
unsigned short bios_control; /* word 16 */
/*
* Host Adapter Control Bits
*/
/* UNUSED 0x0001 */
#define CFULTRAEN 0x0002 /* Ultra SCSI speed enable (Ultra cards) */
#define CFSTERM 0x0004 /* SCSI low byte termination (non-wide cards) */
#define CFWSTERM 0x0008 /* SCSI high byte termination (wide card) */
#define CFSPARITY 0x0010 /* SCSI parity */
/* UNUSED 0x0020 */
#define CFRESETB 0x0040 /* reset SCSI bus at IC initialization */
/* UNUSED 0xff80 */
unsigned short adapter_control; /* word 17 */
/*
* Bus Release, Host Adapter ID
*/
#define CFSCSIID 0x000f /* host adapter SCSI ID */
/* UNUSED 0x00f0 */
#define CFBRTIME 0xff00 /* bus release time */
unsigned short brtime_id; /* word 18 */
/*
* Maximum targets
*/
#define CFMAXTARG 0x00ff /* maximum targets */
/* UNUSED 0xff00 */
unsigned short max_targets; /* word 19 */
unsigned short res_1[11]; /* words 20-30 */
unsigned short checksum; /* word 31 */
};
static char* aic7870_probe __P((pcici_t tag, pcidi_t type));
static void aic7870_attach __P((pcici_t config_id, int unit));
static int load_seeprom __P((struct ahc_data *ahc));
static int acquire_seeprom __P((u_long offset, u_short CS, u_short CK,
u_short DO, u_short DI, u_short RDY,
u_short MS));
static void release_seeprom __P((u_long offset, u_short CS, u_short CK,
u_short DO, u_short DI, u_short RDY,
u_short MS));
static u_char aic3940_count;
static struct pci_device ahc_pci_driver = {
"ahc",
aic7870_probe,
aic7870_attach,
&ahc_unit,
NULL
};
DATA_SET (pcidevice_set, ahc_pci_driver);
static char*
aic7870_probe (pcici_t tag, pcidi_t type)
{
switch(type) {
case PCI_DEVICE_ID_ADAPTEC_3940U:
return ("Adaptec 3940 Ultra SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_3940:
return ("Adaptec 3940 SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_2944U:
return ("Adaptec 2944 Ultra SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_2940U:
return ("Adaptec 2940 Ultra SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_2944:
return ("Adaptec 2944 SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_2940:
return ("Adaptec 2940 SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_AIC7880:
return ("Adaptec aic7880 Ultra SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_AIC7870:
return ("Adaptec aic7870 SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_AIC7850:
return ("Adaptec aic7850 SCSI host adapter");
break;
default:
break;
}
return (0);
}
static void
aic7870_attach(config_id, unit)
pcici_t config_id;
int unit;
{
u_long io_port;
u_long id;
unsigned opri = 0;
ahc_type ahc_t = AHC_NONE;
ahc_flag ahc_f = AHC_FNONE;
struct ahc_data *ahc;
if(!(io_port = pci_conf_read(config_id, PCI_BASEADR0)))
return;
/*
* The first bit of PCI_BASEADR0 is always
* set hence we mask it off.
*/
io_port &= 0xfffffffe;
switch ((id = pci_conf_read(config_id, PCI_ID_REG))) {
case PCI_DEVICE_ID_ADAPTEC_3940U:
case PCI_DEVICE_ID_ADAPTEC_3940:
if (id == PCI_DEVICE_ID_ADAPTEC_3940U)
ahc_t = AHC_394U;
else
ahc_t = AHC_394;
aic3940_count++;
if(!(aic3940_count & 0x01))
/* Even count implies second channel */
ahc_f |= AHC_CHNLB;
/* Even though it doesn't turn on RAMPS, it has them */
ahc_f |= AHC_EXTSCB;
break;
case PCI_DEVICE_ID_ADAPTEC_2944U:
case PCI_DEVICE_ID_ADAPTEC_2940U:
ahc_t = AHC_294U;
break;
case PCI_DEVICE_ID_ADAPTEC_2944:
case PCI_DEVICE_ID_ADAPTEC_2940:
ahc_t = AHC_294;
break;
case PCI_DEVICE_ID_ADAPTEC_AIC7880:
ahc_t = AHC_AIC7880;
break;
case PCI_DEVICE_ID_ADAPTEC_AIC7870:
ahc_t = AHC_AIC7870;
break;
case PCI_DEVICE_ID_ADAPTEC_AIC7850:
ahc_t = AHC_AIC7850;
break;
default:
break;
}
ahc_reset(io_port);
if(ahc_t & AHC_AIC7870){
u_long devconfig = pci_conf_read(config_id, DEVCONFIG);
if(devconfig & (RAMPSM)) {
/*
* External SRAM present. Have the probe walk
* the SCBs to see how much SRAM we have and set
* the number of SCBs accordingly. We have to
* turn off SCBRAMSEL to access the external
* SCB SRAM.
*
* It seems that early versions of the aic7870
* didn't use these bits, hence the hack for the
* 3940 above. I would guess that recent 3940s
* using later aic7870 or aic7880 chips do
* actually set RAMPSM.
*
* The documentation isn't clear, but it sounds
* like the value written to devconfig must not
* have RAMPSM set. The second sixteen bits of
* the register are R/O anyway, so it shouldn't
* affect RAMPSM either way.
*/
devconfig &= ~(RAMPSM|SCBRAMSEL);
pci_conf_write(config_id, DEVCONFIG, devconfig);
ahc_f |= AHC_EXTSCB;
}
}
/*
* Ensure that we are using good values for the PCI burst size
* and latency timer.
*/
{
u_long csize_lattime = pci_conf_read(config_id, CSIZE_LATTIME);
if((csize_lattime & CACHESIZE) == 0) {
/* default to 8DWDs. What's the PCI define for this? */
csize_lattime |= 8;
}
if((csize_lattime & LATTIME) == 0) {
/* Default to 64 PCLKS (is this a good value?) */
/* This may also be availble in the SEEPROM?? */
csize_lattime |= (64 << 8);
}
if(bootverbose)
printf("ahc%d: BurstLen = %dDWDs, "
"Latency Timer = %dPCLKS\n",
csize_lattime & CACHESIZE,
(csize_lattime >> 8) & 0xff);
}
if(!(ahc = ahc_alloc(unit, io_port, ahc_t, ahc_f)))
return; /* XXX PCI code should take return status */
if(!(pci_map_int(config_id, ahcintr, (void *)ahc, &bio_imask))) {
ahc_free(ahc);
return;
}
/*
* Protect ourself from spurrious interrupts during
* intialization.
*/
opri = splbio();
/*
* Do aic7870/aic7880/aic7850 specific initialization
*/
{
u_char sblkctl;
char *id_string;
u_long iobase = ahc->baseport;
switch(ahc->type) {
case AHC_394U:
case AHC_294U:
case AHC_AIC7880:
{
id_string = "aic7880 ";
load_seeprom(ahc);
ahc->maxscbs = 16;
break;
}
case AHC_394:
case AHC_294:
case AHC_AIC7870:
{
id_string = "aic7870 ";
load_seeprom(ahc);
ahc->maxscbs = 16;
break;
}
case AHC_AIC7850:
{
id_string = "aic7850 ";
ahc->maxscbs = 3;
/* Assume there is no BIOS for these cards? */
ahc->flags |= AHC_USEDEFAULTS;
break;
}
default:
{
printf("ahc: Unknown controller type. Ignoring.\n");
return;
break;
}
}
printf("ahc%d: %s", unit, id_string);
/*
* Take the LED out of diagnostic mode
*/
sblkctl = inb(SBLKCTL + iobase);
outb(SBLKCTL + iobase, (sblkctl & ~(DIAGLEDEN|DIAGLEDON)));
/*
* I don't know where this is set in the SEEPROM or by the
* BIOS, so we default to 100%.
*/
outb(DSPCISTATUS + iobase, DFTHRSH_100);
if(ahc->flags & AHC_USEDEFAULTS) {
/*
* PCI Adapter default setup
* Should only be used if the adapter does not have
* an SEEPROM and we don't think a BIOS was installed.
*/
/* Set the host ID */
outb(SCSICONF + iobase, 7);
/* In case we are a wide card */
outb(SCSICONF + 1 + iobase, 7);
}
if(ahc->flags & AHC_EXTSCB) {
/*
* This adapter has external SCB memory.
* Walk the SCBs to determine how many there are.
*/
int i;
for(i = 0; i < AHC_SCB_MAX; i++) {
outb(SCBPTR + iobase, i);
outb(SCBARRAY + iobase, 0xaa);
if(inb(SCBARRAY + iobase) == 0xaa){
outb(SCBARRAY + iobase, 0x55);
if(inb(SCBARRAY + iobase) == 0x55) {
continue;
}
}
break;
}
ahc->maxscbs = i;
}
}
if(ahc_init(ahc)){
ahc_free(ahc);
splx(opri);
return; /* XXX PCI code should take return status */
}
splx(opri);
ahc_attach(ahc);
return;
}
/*
* Read the SEEPROM. Return 0 on failure
*/
int
load_seeprom(ahc)
struct ahc_data *ahc;
{
struct seeprom_config sc;
u_short *scarray = (u_short *)&sc;
u_short checksum = 0;
u_long iobase = ahc->baseport;
u_char host_id;
int have_seeprom, retval;
if(bootverbose)
printf("ahc%d: Reading SEEPROM...", ahc->unit);
have_seeprom = acquire_seeprom(iobase + SEECTL, SEECS,
SEECK, SEEDO, SEEDI, SEERDY, SEEMS);
if (have_seeprom) {
have_seeprom = read_seeprom(iobase + SEECTL,
(u_short *)&sc,
ahc->flags & AHC_CHNLB,
sizeof(sc)/2, SEECS, SEECK, SEEDO,
SEEDI, SEERDY, SEEMS);
release_seeprom(iobase + SEECTL, SEECS, SEECK, SEEDO,
SEEDI, SEERDY, SEEMS);
if (have_seeprom) {
/* Check checksum */
int i;
for (i = 0;i < (sizeof(sc)/2 - 1);i = i + 1)
checksum = checksum + scarray[i];
if (checksum != sc.checksum) {
printf ("checksum error");
have_seeprom = 0;
}
else {
if(bootverbose)
printf("done.\n");
host_id = (sc.brtime_id & CFSCSIID);
}
}
}
if (!have_seeprom) {
printf("\nahc%d: SEEPROM read failed, "
"using leftover BIOS values\n", ahc->unit);
retval = 0;
host_id = 0x7; /* Assume a default */
/*
* If we happen to be an ULTRA card,
* default to non-ultra mode.
*/
ahc->type &= ~AHC_ULTRA;
}
else {
/*
* Put the data we've collected down into SRAM
* where ahc_init will find it.
*/
int i;
int max_targ = sc.max_targets & CFMAXTARG;
for(i = 0; i <= max_targ; i++){
u_char target_settings;
target_settings = (sc.device_flags[i] & CFXFER) << 4;
if (sc.device_flags[i] & CFSYNCH)
target_settings |= SOFS;
if (sc.device_flags[i] & CFWIDEB)
target_settings |= WIDEXFER;
if (sc.device_flags[i] & CFDISC)
ahc->discenable |= (0x01 << i);
outb(TARG_SCRATCH+i+iobase, target_settings);
}
outb(DISC_DSB + iobase, ~(ahc->discenable & 0xff));
outb(DISC_DSB + iobase + 1, ~((ahc->discenable >> 8) & 0xff));
host_id = sc.brtime_id & CFSCSIID;
if(ahc->type & AHC_ULTRA) {
/* Should we enable Ultra mode? */
if(!(sc.adapter_control & CFULTRAEN))
/* Treat us as a non-ultra card */
ahc->type &= ~AHC_ULTRA;
}
retval = 1;
}
/* Set the host ID */
outb(SCSICONF + iobase, host_id);
/* In case we are a wide card */
outb(SCSICONF + 1 + iobase, host_id);
return(retval);
}
static int
acquire_seeprom(offset, CS, CK, DO, DI, RDY, MS)
u_long offset;
u_short CS; /* chip select */
u_short CK; /* clock */
u_short DO; /* data out */
u_short DI; /* data in */
u_short RDY; /* ready */
u_short MS; /* mode select */
{
int wait;
/*
* Request access of the memory port. When access is
* granted, SEERDY will go high. We use a 1 second
* timeout which should be near 1 second more than
* is needed. Reason: after the chip reset, there
* should be no contention.
*/
outb(offset, MS);
wait = 1000; /* 1 second timeout in msec */
while (--wait && ((inb(offset) & RDY) == 0)) {
DELAY (1000); /* delay 1 msec */
}
if ((inb(offset) & RDY) == 0) {
outb (offset, 0);
return (0);
}
return(1);
}
static void
release_seeprom(offset, CS, CK, DO, DI, RDY, MS)
u_long offset;
u_short CS; /* chip select */
u_short CK; /* clock */
u_short DO; /* data out */
u_short DI; /* data in */
u_short RDY; /* ready */
u_short MS; /* mode select */
{
/* Release access to the memory port and the serial EEPROM. */
outb(offset, 0);
}
#endif /* NPCI > 0 */
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