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freebsd/sys/pci/aic7870.c
Justin T. Gibbs 47402bab91 Correct SEEPROM checksum calculation when multiple checksum attemps are made. 
Pointed out by:	"Jose M. Alcaide" <jose@we.lc.ehu.es>
1998-07-16 19:33:43 +00:00

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/*
* Product specific probe and attach routines for:
* 3940, 2940, aic7880, aic7870, aic7860 and aic7850 SCSI controllers
*
* Copyright (c) 1995-1997 Justin 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, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 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.
*
* Where this Software is combined with software released under the terms of
* the GNU Public License ("GPL") and the terms of the GPL would require the
* combined work to also be released under the terms of the GPL, the terms
* and conditions of this License will apply in addition to those of the
* GPL with the exception of any terms or conditions of this License that
* conflict with, or are expressly prohibited by, the GPL.
*
* 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 1.55 1998/07/06 18:38:57 gibbs Exp $
*/
#if defined(__FreeBSD__)
#include "pci.h"
#endif
#if NPCI > 0 || defined(__NetBSD__)
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/queue.h>
#if defined(__NetBSD__)
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/intr.h>
#endif /* defined(__NetBSD__) */
#include <scsi/scsiconf.h>
#if defined(__FreeBSD__)
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#include <machine/clock.h>
#include <i386/scsi/aic7xxx.h>
#include <i386/scsi/93cx6.h>
#include "aic7xxx_reg.h"
#define PCI_BASEADR0 PCI_MAP_REG_START /* I/O Address */
#define PCI_BASEADR1 PCI_MAP_REG_START + 4 /* Mem I/O Address */
#elif defined(__NetBSD__)
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/ic/aic7xxxreg.h>
#include <dev/ic/aic7xxxvar.h>
#include <dev/ic/smc93cx6var.h>
#define bootverbose 1
#define PCI_BASEADR0 PCI_MAPREG_START /* I/O Address */
#define PCI_BASEADR1 PCI_MAPREG_START + 4 /* Mem I/O Address */
#endif /* defined(__NetBSD__) */
#define PCI_DEVICE_ID_ADAPTEC_398XU 0x83789004ul
#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_2940AU 0x61789004ul
#define PCI_DEVICE_ID_ADAPTEC_398X 0x73789004ul
#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 PCI_DEVICE_ID_ADAPTEC_AIC7810 0x10789004ul
#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 */
u_int16_t 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 */
u_int16_t bios_control; /* word 16 */
/*
* Host Adapter Control Bits
*/
#define CFAUTOTERM 0x0001 /* Perform Auto termination */
#define CFULTRAEN 0x0002 /* Ultra SCSI speed enable */
#define CFSTERM 0x0004 /* SCSI low byte termination */
#define CFWSTERM 0x0008 /* SCSI high byte termination */
#define CFSPARITY 0x0010 /* SCSI parity */
/* UNUSED 0x0020 */
#define CFRESETB 0x0040 /* reset SCSI bus at boot */
/* UNUSED 0xff80 */
u_int16_t adapter_control; /* word 17 */
/*
* Bus Release, Host Adapter ID
*/
#define CFSCSIID 0x000f /* host adapter SCSI ID */
/* UNUSED 0x00f0 */
#define CFBRTIME 0xff00 /* bus release time */
u_int16_t brtime_id; /* word 18 */
/*
* Maximum targets
*/
#define CFMAXTARG 0x00ff /* maximum targets */
/* UNUSED 0xff00 */
u_int16_t max_targets; /* word 19 */
u_int16_t res_1[11]; /* words 20-30 */
u_int16_t checksum; /* word 31 */
};
static void load_seeprom __P((struct ahc_softc *ahc, u_int8_t *sxfrctl1));
static int acquire_seeprom __P((struct seeprom_descriptor *sd));
static void release_seeprom __P((struct seeprom_descriptor *sd));
static void write_brdctl __P((struct ahc_softc *ahc, u_int8_t value));
static u_int8_t read_brdctl __P((struct ahc_softc *ahc));
static int aic3940_count;
static int aic398X_count;
static struct ahc_softc *first_398X;
#if defined(__FreeBSD__)
static char* aic7870_probe __P((pcici_t tag, pcidi_t type));
static void aic7870_attach __P((pcici_t config_id, int unit));
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_398XU:
return ("Adaptec 398X Ultra SCSI RAID adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_3940U:
return ("Adaptec 3940 Ultra SCSI host adapter");
break;
case PCI_DEVICE_ID_ADAPTEC_398X:
return ("Adaptec 398X SCSI RAID 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_2940AU:
return ("Adaptec 2940A Ultra 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;
case PCI_DEVICE_ID_ADAPTEC_AIC7810:
return ("Adaptec aic7810 RAID memory controller");
break;
default:
break;
}
return (0);
}
#elif defined(__NetBSD__)
int ahc_pci_probe __P((struct device *, void *, void *));
void ahc_pci_attach __P((struct device *, struct device *, void *));
struct cfattach ahc_pci_ca = {
sizeof(struct ahc_softc), ahc_pci_probe, ahc_pci_attach
};
int
ahc_pci_probe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct pci_attach_args *pa = aux;
switch (pa->pa_id) {
case PCI_DEVICE_ID_ADAPTEC_398XU:
case PCI_DEVICE_ID_ADAPTEC_3940U:
case PCI_DEVICE_ID_ADAPTEC_2944U:
case PCI_DEVICE_ID_ADAPTEC_2940U:
case PCI_DEVICE_ID_ADAPTEC_2940AU:
case PCI_DEVICE_ID_ADAPTEC_398X:
case PCI_DEVICE_ID_ADAPTEC_3940:
case PCI_DEVICE_ID_ADAPTEC_2944:
case PCI_DEVICE_ID_ADAPTEC_2940:
case PCI_DEVICE_ID_ADAPTEC_AIC7880:
case PCI_DEVICE_ID_ADAPTEC_AIC7870:
case PCI_DEVICE_ID_ADAPTEC_AIC7860:
case PCI_DEVICE_ID_ADAPTEC_AIC7855:
case PCI_DEVICE_ID_ADAPTEC_AIC7850:
case PCI_DEVICE_ID_ADAPTEC_AIC7810:
return 1;
}
return 0;
}
#endif /* defined(__NetBSD__) */
#if defined(__FreeBSD__)
static void
aic7870_attach(config_id, unit)
pcici_t config_id;
int unit;
#elif defined(__NetBSD__)
void
ahc_pci_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
#endif
{
#if defined(__FreeBSD__)
u_int16_t io_port;
struct ahc_softc *ahc;
#elif defined(__NetBSD__)
struct pci_attach_args *pa = aux;
struct ahc_softc *ahc = (void *)self;
int unit = ahc->sc_dev.dv_unit;
bus_io_addr_t iobase;
bus_io_size_t iosize;
bus_io_handle_t ioh;
pci_intr_handle_t ih;
const char *intrstr;
#endif
u_int32_t id;
u_int32_t command;
struct scb_data *shared_scb_data;
int opri;
ahc_type ahc_t = AHC_NONE;
ahc_flag ahc_f = AHC_FNONE;
vm_offset_t vaddr;
vm_offset_t paddr;
u_int8_t ultra_enb = 0;
u_int8_t our_id = 0;
u_int8_t sxfrctl1;
shared_scb_data = NULL;
vaddr = NULL;
paddr = NULL;
#if defined(__FreeBSD__)
io_port = 0;
command = pci_conf_read(config_id, PCI_COMMAND_STATUS_REG);
#ifdef AHC_ALLOW_MEMIO
if ((command & PCI_COMMAND_MEM_ENABLE) == 0
|| (pci_map_mem(config_id, PCI_BASEADR1, &vaddr, &paddr)) == 0)
#endif
if ((command & PCI_COMMAND_IO_ENABLE) == 0
|| (pci_map_port(config_id, PCI_BASEADR0, &io_port)) == 0)
return;
#elif defined(__NetBSD__)
/* XXX Memory mapped I/O?? */
if (bus_io_map(pa->pa_bc, iobase, iosize, &ioh))
if (pci_io_find(pa->pa_pc, pa->pa_tag, PCI_BASEADR0, &iobase,
&iosize))
return;
#endif
#if defined(__FreeBSD__)
switch ((id = pci_conf_read(config_id, PCI_ID_REG))) {
#elif defined(__NetBSD__)
switch (id = pa->pa_id) {
#endif
case PCI_DEVICE_ID_ADAPTEC_398XU:
case PCI_DEVICE_ID_ADAPTEC_398X:
if (id == PCI_DEVICE_ID_ADAPTEC_398XU)
ahc_t = AHC_398U;
else
ahc_t = AHC_398;
switch (aic398X_count) {
case 0:
break;
case 1:
ahc_f |= AHC_CHNLB;
break;
case 2:
ahc_f |= AHC_CHNLC;
break;
default:
break;
}
aic398X_count++;
if (first_398X != NULL)
#ifdef AHC_SHARE_SCBS
shared_scb_data = first_398X->scb_data;
#endif
if (aic398X_count == 3) {
/*
* This is the last device on this RAID
* controller, so reset our counts.
* XXX This won't work for the multiple 3980
* controllers since they have only 2 channels,
* but I'm not even sure if Adaptec actually
* went through with their plans to produce
* this controller.
*/
aic398X_count = 0;
first_398X = NULL;
}
break;
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;
if ((aic3940_count & 0x01) != 0)
/* Odd count implies second channel */
ahc_f |= AHC_CHNLB;
aic3940_count++;
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_2940AU:
ahc_t = AHC_294AU;
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;
case PCI_DEVICE_ID_ADAPTEC_AIC7810:
printf("RAID functionality unsupported\n");
return;
default:
break;
}
/* On all PCI adapters, we allow SCB paging */
ahc_f |= AHC_PAGESCBS;
#if defined(__FreeBSD__)
if ((ahc = ahc_alloc(unit, io_port, vaddr, ahc_t, ahc_f,
shared_scb_data)) == NULL)
return; /* XXX PCI code should take return status */
#else
ahc_construct(ahc, pa->pa_bc, ioh, ahc_t, ahc_f);
#endif
/* Remeber how the card was setup in case there is no SEEPROM */
our_id = ahc_inb(ahc, SCSIID) & OID;
if (ahc_t & AHC_ULTRA)
ultra_enb = ahc_inb(ahc, SXFRCTL0) & FAST20;
sxfrctl1 = ahc_inb(ahc, SXFRCTL1) & STPWEN;
#if defined(__NetBSD__)
printf("\n");
#endif
ahc_reset(ahc);
#ifdef AHC_SHARE_SCBS
if (ahc_t & AHC_AIC7870) {
#if defined(__FreeBSD__)
u_int32_t devconfig = pci_conf_read(config_id, DEVCONFIG);
#elif defined(__NetBSD__)
u_int32_t devconfig =
pci_conf_read(pa->pa_pc, pa->pa_tag, DEVCONFIG);
#endif
if (devconfig & (RAMPSM)) {
/* XXX Assume 9bit SRAM and enable parity checking */
devconfig |= EXTSCBPEN;
/* XXX Assume fast SRAM and only enable 2 cycle
* access if we are sharing the SRAM across mutiple
* adapters (398X adapter).
*/
if ((devconfig & MPORTMODE) == 0)
/* Multi-user mode */
devconfig |= EXTSCBTIME;
devconfig &= ~SCBRAMSEL;
#if defined(__FreeBSD__)
pci_conf_write(config_id, DEVCONFIG, devconfig);
#elif defined(__NetBSD__)
pci_conf_write(pa->pa_pc, pa->pa_tag,
DEVCONFIG, devconfig);
#endif
}
}
#endif
#if defined(__FreeBSD__)
if (!(pci_map_int(config_id, ahc_intr, (void *)ahc, &bio_imask))) {
ahc_free(ahc);
return;
}
#elif defined(__NetBSD__)
if (pci_intr_map(pa->pa_pc, pa->pa_intrtag, pa->pa_intrpin,
pa->pa_intrline, &ih)) {
printf("%s: couldn't map interrupt\n", ahc->sc_dev.dv_xname);
ahc_free(ahc);
return;
}
intrstr = pci_intr_string(pa->pa_pc, ih);
#ifdef __OpenBSD__
ahc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_BIO, ahc_intr, ahc,
ahc->sc_dev.dv_xname);
#else
ahc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_BIO, ahc_intr, ahc);
#endif
if (ahc->sc_ih == NULL) {
printf("%s: couldn't establish interrupt",
ahc->sc_dev.dv_xname);
if (intrstr != NULL)
printf(" at %s", intrstr);
printf("\n");
ahc_free(ahc);
return;
}
if (intrstr != NULL)
printf("%s: interrupting at %s\n", ahc->sc_dev.dv_xname,
intrstr);
#endif
/*
* Protect ourself from spurrious interrupts during
* intialization.
*/
opri = splbio();
/*
* Do aic7880/aic7870/aic7860/aic7850 specific initialization
*/
{
u_int8_t sblkctl;
char *id_string;
switch(ahc->type) {
case AHC_398U:
case AHC_394U:
case AHC_294U:
case AHC_AIC7880:
id_string = "aic7880 ";
load_seeprom(ahc, &sxfrctl1);
break;
case AHC_398:
case AHC_394:
case AHC_294:
case AHC_AIC7870:
id_string = "aic7870 ";
load_seeprom(ahc, &sxfrctl1);
break;
case AHC_294AU:
case AHC_AIC7860:
id_string = "aic7860 ";
load_seeprom(ahc, &sxfrctl1);
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 = ahc_inb(ahc, SBLKCTL);
ahc_outb(ahc, SBLKCTL, (sblkctl & ~(DIAGLEDEN|DIAGLEDON)));
/*
* I don't know where this is set in the SEEPROM or by the
* BIOS, so we default to 100%.
*/
ahc_outb(ahc, DSPCISTATUS, 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_int32_t i;
for (i = TARG_SCRATCH; i < 0x60; i++) {
if (ahc_inb(ahc, i) != 0x00)
break;
}
if (i == TARG_SCRATCH) {
/*
* Try looking for all ones. You can get
* either.
*/
for (i = TARG_SCRATCH; i < 0x60; i++) {
if (ahc_inb(ahc, i) != 0xff)
break;
}
}
if ((i != 0x60) && (our_id != 0)) {
printf("%s: Using left over BIOS settings\n",
ahc_name(ahc));
ahc->flags &= ~AHC_USEDEFAULTS;
} else {
/*
* Assume only one connector and always turn
* on termination.
*/
our_id = 0x07;
sxfrctl1 = STPWEN;
}
ahc_outb(ahc, SCSICONF,
(our_id & 0x07)|ENSPCHK|RESET_SCSI);
/* In case we are a wide card */
ahc_outb(ahc, SCSICONF + 1, our_id);
if (ultra_enb == 0
&& (ahc->flags & AHC_USEDEFAULTS) == 0) {
/*
* 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("%s: %s", ahc_name(ahc), id_string);
}
/*
* Put our termination setting into sxfrctl1 now so that the
* generic initialization can see it.
*/
sxfrctl1 |= ahc_inb(ahc, SXFRCTL1);
ahc_outb(ahc, SXFRCTL1, sxfrctl1);
if (ahc_init(ahc)){
ahc_free(ahc);
splx(opri);
return; /* XXX PCI code should take return status */
}
if ((ahc->type & AHC_398) == AHC_398) {
/* Only set this once we've successfully probed */
if (shared_scb_data == NULL)
first_398X = ahc;
}
splx(opri);
ahc_attach(ahc);
}
/*
* Read the SEEPROM. Return 0 on failure
*/
void
load_seeprom(ahc, sxfrctl1)
struct ahc_softc *ahc;
u_int8_t *sxfrctl1;
{
struct seeprom_descriptor sd;
struct seeprom_config sc;
u_int16_t *scarray = (u_int16_t *)&sc;
u_int8_t scsi_conf;
u_int8_t host_id;
int have_seeprom;
#if defined(__FreeBSD__)
sd.sd_maddr = ahc->maddr;
if (sd.sd_maddr != NULL)
sd.sd_maddr += SEECTL;
sd.sd_iobase = ahc->baseport;
if (sd.sd_iobase != 0)
sd.sd_iobase += SEECTL;
#elif defined(__NetBSD__)
sd.sd_bc = ahc->sc_bc;
sd.sd_ioh = ahc->sc_ioh;
sd.sd_offset = SEECTL;
#endif
/*
* For some multi-channel devices, the c46 is simply too
* small to work. For the other controller types, we can
* get our information from either SEEPROM type. Set the
* type to start our probe with accordingly.
*/
if ((ahc->type & AHC_398) == AHC_398)
sd.sd_chip = C56_66;
else
sd.sd_chip = C46;
sd.sd_MS = SEEMS;
sd.sd_RDY = SEERDY;
sd.sd_CS = SEECS;
sd.sd_CK = SEECK;
sd.sd_DO = SEEDO;
sd.sd_DI = SEEDI;
have_seeprom = acquire_seeprom(&sd);
if (have_seeprom) {
if (bootverbose)
printf("%s: Reading SEEPROM...", ahc_name(ahc));
for (;;) {
u_int start_addr;
start_addr = ahc->flags & (AHC_CHNLB|AHC_CHNLC);
have_seeprom = read_seeprom(&sd, (u_int16_t *)&sc,
start_addr, sizeof(sc)/2);
if (have_seeprom) {
/* Check checksum */
int i;
int maxaddr;
u_int16_t *scarray;
u_int16_t checksum;
maxaddr = (sizeof(sc)/2) - 1;
checksum = 0;
scarray = (u_int16_t *)&sc;
for (i = 0; i < maxaddr; i++)
checksum = checksum + scarray[i];
if (checksum == 0 || checksum != sc.checksum) {
if (bootverbose && sd.sd_chip == C56_66)
printf ("checksum error\n");
have_seeprom = 0;
} else {
if (bootverbose)
printf("done.\n");
break;
}
}
if (sd.sd_chip == C56_66)
break;
sd.sd_chip = C56_66;
}
}
release_seeprom(&sd);
if (!have_seeprom) {
if (bootverbose)
printf("\n%s: No SEEPROM available\n", ahc_name(ahc));
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);
ahc_outb(ahc, TARG_SCRATCH+i, target_settings);
}
ahc_outb(ahc, DISC_DSB, ~(ahc->discenable & 0xff));
ahc_outb(ahc, DISC_DSB + 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;
/*
* Update the settings in sxfrctl1 to match the
*termination settings
*/
*sxfrctl1 = 0;
if (sc.adapter_control & CFAUTOTERM) {
/* Play around with the memory port */
have_seeprom = acquire_seeprom(&sd);
if (have_seeprom) {
u_int8_t brdctl;
u_int8_t seectl;
int internal50_present;
int internal68_present;
int external68_present;
int eprom_present;
int high_on;
int low_on;
seectl = sd.sd_CS|sd.sd_MS;
SEEPROM_OUTB(&sd, seectl);
/*
* First read the status of our cables.
* Set the rom bank to 0 since the
* bank setting serves as a multiplexor
* for the cable detection logic.
* BRDDAT5 controls the bank switch.
*/
write_brdctl(ahc, 0);
/*
* Now read the state of the internal
* connectors. BRDDAT6 is INT50 and
* BRDDAT7 is INT68.
*/
brdctl = read_brdctl(ahc);
internal50_present = !(brdctl & BRDDAT6);
internal68_present = !(brdctl & BRDDAT7)
&& (max_targ > 8);
if (bootverbose) {
printf("internal50 cable %s present\n"
"internal68 cable %s present\n"
"brdctl == 0x%x\n",
internal50_present ? "is":"not",
internal68_present ? "is":"not",
brdctl);
}
/*
* Set the rom bank to 1 and determine
* the other signals.
*/
write_brdctl(ahc, BRDDAT5);
/*
* Now read the state of the external
* connectors. BRDDAT6 is EXT68 and
* BRDDAT7 is EPROMPS.
*/
brdctl = read_brdctl(ahc);
external68_present = !(brdctl & BRDDAT6);
eprom_present = brdctl & BRDDAT7;
if (bootverbose) {
printf("external cable %s present\n"
"eprom %s present\n"
"brdctl == 0x%x\n",
external68_present ? "is":"not",
eprom_present ? "is" : "not",
brdctl);
}
/*
* Now set the termination based on what
* we found. BRDDAT6 controls wide
* termination enable.
*/
high_on = FALSE;
low_on = FALSE;
if ((max_targ > 8)
&& ((external68_present == 0)
|| (internal68_present == 0)))
high_on = TRUE;
if (((internal50_present ? 1 : 0)
+ (internal68_present ? 1 : 0)
+ (external68_present ? 1 : 0)) <= 1)
low_on = TRUE;
if ((internal50_present != 0)
&& (internal68_present != 0)
&& (external68_present != 0)) {
printf("Illegal cable configuration!!. "
"Only two connectors on the "
"adapter may be used at a "
"time!");
}
if (high_on == TRUE)
write_brdctl(ahc, BRDDAT6);
else
write_brdctl(ahc, 0);
if (low_on == TRUE)
*sxfrctl1 |= STPWEN;
if (bootverbose) {
printf("low byte termination %s, "
"high byte termination %s\n",
low_on ? "enabled":"disabled",
high_on ? "enabled":"disabled");
}
}
release_seeprom(&sd);
} else {
if (sc.adapter_control & CFSTERM)
*sxfrctl1 |= STPWEN;
have_seeprom = acquire_seeprom(&sd);
if (have_seeprom) {
SEEPROM_OUTB(&sd, sd.sd_CS|sd.sd_MS);
if (sc.adapter_control & CFWSTERM)
write_brdctl(ahc, BRDDAT6);
else
write_brdctl(ahc, 0);
release_seeprom(&sd);
} else
printf("Unabled to configure high byte "
"termination!\n");
if (bootverbose) {
printf("low byte termination %s, "
"high byte termination %s\n",
sc.adapter_control & CFSTERM ?
"enabled":"disabled",
sc.adapter_control & CFWSTERM ?
"enabled":"disabled");
}
}
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 */
ahc_outb(ahc, SCSICONF, scsi_conf);
/* In case we are a wide card */
ahc_outb(ahc, SCSICONF + 1, host_id);
}
}
static int
acquire_seeprom(sd)
struct seeprom_descriptor *sd;
{
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.
*/
SEEPROM_OUTB(sd, sd->sd_MS);
wait = 1000; /* 1 second timeout in msec */
while (--wait && ((SEEPROM_INB(sd) & sd->sd_RDY) == 0)) {
DELAY (1000); /* delay 1 msec */
}
if ((SEEPROM_INB(sd) & sd->sd_RDY) == 0) {
SEEPROM_OUTB(sd, 0);
return (0);
}
return(1);
}
static void
release_seeprom(sd)
struct seeprom_descriptor *sd;
{
/* Release access to the memory port and the serial EEPROM. */
SEEPROM_OUTB(sd, 0);
}
static void
write_brdctl(ahc, value)
struct ahc_softc *ahc;
u_int8_t value;
{
u_int8_t brdctl;
brdctl = BRDCS|BRDSTB;
ahc_outb(ahc, BRDCTL, brdctl);
brdctl |= value;
ahc_outb(ahc, BRDCTL, brdctl);
brdctl &= ~BRDSTB;
ahc_outb(ahc, BRDCTL, brdctl);
brdctl &= ~BRDCS;
ahc_outb(ahc, BRDCTL, brdctl);
}
static u_int8_t
read_brdctl(ahc)
struct ahc_softc *ahc;
{
ahc_outb(ahc, BRDCTL, BRDRW|BRDCS);
return ahc_inb(ahc, BRDCTL);
}
#endif /* NPCI > 0 */
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