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freebsd-dev/sys/pci/aic7870.c
Justin T. Gibbs 58efe44318 Fix a brain-o. The scratch ram on aic78X0 controllers is initialized to 0x00 
not 0xff after POST, so test for that when trying to determine if a BIOS
intialized the card for us.
1996-05-12 16:25:32 +00:00

602 lines
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/*
* Product specific probe and attach routines for:
* 3940, 2940, aic7880, aic7870, aic7860 and aic7850 SCSI controllers
*
* Copyright (c) 1995, 1996 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: aic7870.c,v 1.32 1996/05/12 01:50:33 gibbs Exp $
*/
#include <pci.h>
#if NPCI > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/queue.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_AIC7860 0x60789004ul
#define PCI_DEVICE_ID_ADAPTEC_AIC7855 0x55789004ul
#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 void 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_AIC7860:
return ("Adaptec aic7860 SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_AIC7855:
return ("Adaptec aic7855 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;
u_char ultra_enb = 0;
u_char our_id = 0;
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;
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_AIC7860:
ahc_t = AHC_AIC7860;
break;
case PCI_DEVICE_ID_ADAPTEC_AIC7855:
case PCI_DEVICE_ID_ADAPTEC_AIC7850:
ahc_t = AHC_AIC7850;
break;
default:
break;
}
/* On all PCI adapters, we allow SCB paging */
ahc_f |= AHC_PAGESCBS;
/* Remeber how the card was setup in case there is no SEEPROM */
our_id = inb(SCSIID + io_port) & OID;
if(ahc_t & AHC_ULTRA)
ultra_enb = inb(SXFRCTL0 + io_port) & ULTRAEN;
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);
}
}
/*
* 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 = %ldDWDs, "
"Latency Timer = %ldPCLKS\n",
unit,
csize_lattime & CACHESIZE,
(csize_lattime >> 8) & 0xff);
pci_conf_write(config_id, CSIZE_LATTIME, csize_lattime);
}
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, ahc_intr, (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);
break;
}
case AHC_394:
case AHC_294:
case AHC_AIC7870:
{
id_string = "aic7870 ";
load_seeprom(ahc);
break;
}
case AHC_AIC7860:
{
id_string = "aic7860 ";
/*
* Use defaults, if the chip wasn't initialized by
* a BIOS.
*/
ahc->flags |= AHC_USEDEFAULTS;
break;
}
case AHC_AIC7850:
{
id_string = "aic7850 ";
/*
* Use defaults, if the chip wasn't initialized by
* a BIOS.
*/
ahc->flags |= AHC_USEDEFAULTS;
break;
}
default:
{
printf("ahc: Unknown controller type. Ignoring.\n");
ahc_free(ahc);
splx(opri);
return;
}
}
/*
* 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.
*/
/* See if someone else set us up already */
u_long i;
for(i=io_port + TARG_SCRATCH; i < io_port + 0x60; i++) {
if(inb(i) != 0x00)
break;
}
if(i != io_port + 0x60) {
printf("ahc%d: Using left over BIOS settings\n",
ahc->unit);
ahc->flags &= ~AHC_USEDEFAULTS;
}
else
our_id = 0x07;
outb(SCSICONF + io_port, (our_id & 0x07)|ENSPCHK|RESET_SCSI);
/* In case we are a wide card */
outb(SCSICONF + 1 + io_port, our_id);
if(!ultra_enb || (ahc->flags & AHC_USEDEFAULTS)) {
/*
* If there wasn't a BIOS or the board
* wasn't in this mode to begin with,
* turn off ultra.
*/
ahc->type &= ~AHC_ULTRA;
}
}
printf("ahc%d: %s", unit, id_string);
}
if(ahc_init(ahc)){
ahc_free(ahc);
splx(opri);
return; /* XXX PCI code should take return status */
}
splx(opri);
ahc_attach(ahc);
}
/*
* Read the SEEPROM. Return 0 on failure
*/
void
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 scsi_conf;
u_char host_id;
int have_seeprom;
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) {
if(bootverbose)
printf ("checksum error");
have_seeprom = 0;
}
else if(bootverbose)
printf("done.\n");
}
}
if (!have_seeprom) {
if(bootverbose)
printf("\nahc%d: No SEEPROM availible\n", ahc->unit);
ahc->flags |= AHC_USEDEFAULTS;
}
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;
scsi_conf = (host_id & 0x7);
if(sc.adapter_control & CFSPARITY)
scsi_conf |= ENSPCHK;
if(sc.adapter_control & CFRESETB)
scsi_conf |= RESET_SCSI;
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;
}
/* Set the host ID */
outb(SCSICONF + iobase, scsi_conf);
/* In case we are a wide card */
outb(SCSICONF + 1 + iobase, host_id);
}
return;
}
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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