NetBSD/sys/arch/i386/isa/ahc_isa.c

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/* $NetBSD: ahc_isa.c,v 1.5 1996/10/21 22:27:39 thorpej Exp $ */
/*
* Product specific probe and attach routines for:
* 284X VLbus SCSI controllers
*
* Copyright (c) 1996 Jason R. Thorpe.
* All rights reserved.
*
* Copyright (c) 1995, 1996 Christopher G. Demetriou.
* All rights reserved.
*
* Copyright (c) 1994, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou
* for the NetBSD Project.
* 4. 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.
*/
/*
* This front-end driver is really sort of a hack. The AHA-284X likes
* to masquerade as an EISA device. However, on VLbus machines with
* no EISA signature in the BIOS, the EISA bus will never be scanned.
* This is intended to catch the 284X controllers on those systems
* by looking in "EISA i/o space" for 284X controllers.
*
* This relies heavily on i/o port accounting. We also just use the
* EISA macros for everything ... it's a real waste to redefine them.
*
* Note: there isn't any #ifdef for FreeBSD in this file, since the
* FreeBSD EISA driver handles all cases of the 284X.
*
* -- Jason R. Thorpe <thorpej@NetBSD.ORG>
* July 12, 1996
*
* TODO: some code could be shared with ahc_eisa.c, but it would probably
* be a logistical mightmare to even try.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <dev/isa/isavar.h>
#include <dev/eisa/eisareg.h>
#include <dev/eisa/eisavar.h>
#include <dev/eisa/eisadevs.h>
#include <dev/ic/aic7xxxreg.h>
#include <dev/ic/aic7xxxvar.h>
/* IO port address setting range as EISA slot number */
#define AHC_ISA_MIN_SLOT 0x1 /* from iobase = 0x1c00 */
#define AHC_ISA_MAX_SLOT 0xe /* to iobase = 0xec00 */
#define AHC_ISA_SLOT_OFFSET 0xc00 /* offset from EISA IO space */
#define AHC_ISA_IOSIZE 0x100
/*
* I/O port offsets
*/
#define INTDEF 0x5cul /* Interrupt Definition Register */
#define AHC_ISA_VID (EISA_SLOTOFF_VID - AHC_ISA_SLOT_OFFSET)
#define AHC_ISA_PID (EISA_SLOTOFF_PID - AHC_ISA_SLOT_OFFSET)
#define AHC_ISA_PRIMING AHC_ISA_VID /* enable vendor/product ID */
/*
* AHC_ISA_PRIMING register values (write)
*/
#define AHC_ISA_PRIMING_VID(index) (AHC_ISA_VID + (index))
#define AHC_ISA_PRIMING_PID(index) (AHC_ISA_PID + (index))
int ahc_isa_irq __P((bus_space_tag_t, bus_space_handle_t));
int ahc_isa_idstring __P((bus_space_tag_t, bus_space_handle_t, char *));
int ahc_isa_match __P((struct isa_attach_args *, bus_addr_t));
int ahc_isa_probe __P((struct device *, void *, void *));
void ahc_isa_attach __P((struct device *, struct device *, void *));
struct cfattach ahc_isa_ca = {
sizeof(struct ahc_data), ahc_isa_probe, ahc_isa_attach
};
/*
* This keeps track of which slots are to be checked next if the
* iobase locator is a wildcard. A simple static variable isn't enough,
* since it's conceivable that a system might have more than one ISA
* bus.
*
* The "bus" member is the unit number of the parent ISA bus, e.g. "0"
* for "isa0".
*/
struct ahc_isa_slot {
LIST_ENTRY(ahc_isa_slot) link;
int bus;
int slot;
};
static LIST_HEAD(, ahc_isa_slot) ahc_isa_all_slots;
static int ahc_isa_slot_initialized;
/*
* Return irq setting of the board, otherwise -1.
*/
int
ahc_isa_irq(iot, ioh)
bus_space_tag_t iot;
bus_space_handle_t ioh;
{
int irq;
u_char intdef;
ahc_reset("ahc_isa", iot, ioh);
intdef = bus_space_read_1(iot, ioh, INTDEF);
switch (irq = (intdef & 0xf)) {
case 9:
case 10:
case 11:
case 12:
case 14:
case 15:
break;
default:
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printf("ahc_isa_irq: illegal irq setting %d\n", intdef);
return -1;
}
/* Note that we are going and return (to probe) */
return irq;
}
int
ahc_isa_idstring(iot, ioh, idstring)
bus_space_tag_t iot;
bus_space_handle_t ioh;
char *idstring;
{
u_int8_t vid[EISA_NVIDREGS], pid[EISA_NPIDREGS];
int i;
/* Get the vendor ID bytes */
for (i = 0; i < EISA_NVIDREGS; i++) {
bus_space_write_1(iot, ioh, AHC_ISA_PRIMING,
AHC_ISA_PRIMING_VID(i));
vid[i] = bus_space_read_1(iot, ioh, AHC_ISA_VID + i);
}
/* Check for device existence */
if (EISA_VENDID_NODEV(vid)) {
#if 0
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printf("ahc_isa_idstring: no device at 0x%lx\n",
ioh); /* XXX knows about ioh guts */
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printf("\t(0x%x, 0x%x)\n", vid[0], vid[1]);
#endif
return (0);
}
/* And check that the firmware didn't biff something badly */
if (EISA_VENDID_IDDELAY(vid)) {
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printf("ahc_isa_idstring: BIOS biffed it at 0x%lx\n",
ioh); /* XXX knows about ioh guts */
return (0);
}
/* Get the product ID bytes */
for (i = 0; i < EISA_NPIDREGS; i++) {
bus_space_write_1(iot, ioh, AHC_ISA_PRIMING,
AHC_ISA_PRIMING_PID(i));
pid[i] = bus_space_read_1(iot, ioh, AHC_ISA_PID + i);
}
/* Create the ID string from the vendor and product IDs */
idstring[0] = EISA_VENDID_0(vid);
idstring[1] = EISA_VENDID_1(vid);
idstring[2] = EISA_VENDID_2(vid);
idstring[3] = EISA_PRODID_0(pid);
idstring[4] = EISA_PRODID_1(pid);
idstring[5] = EISA_PRODID_2(pid);
idstring[6] = EISA_PRODID_3(pid);
idstring[7] = '\0'; /* sanity */
return (1);
}
int
ahc_isa_match(ia, iobase)
struct isa_attach_args *ia;
bus_addr_t iobase;
{
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
int irq;
char idstring[EISA_IDSTRINGLEN];
/*
* Get a mapping for the while slot-specific address
* space. If we can't, assume nothing's there, but
* warn about it.
*/
if (bus_space_map(iot, iobase, AHC_ISA_IOSIZE, 0, &ioh)) {
#if 0
/*
* Don't print anything out here, since this could
* be common on machines configured to look for
* ahc_eisa and ahc_isa.
*/
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printf("ahc_isa_match: can't map I/O space for 0x%x\n",
iobase);
#endif
return (0);
}
if (!ahc_isa_idstring(iot, ioh, idstring))
irq = -1; /* cannot get the ID string */
else if (strcmp(idstring, "ADP7756") &&
strcmp(idstring, "ADP7757"))
irq = -1; /* unknown ID strings */
else
irq = ahc_isa_irq(iot, ioh);
bus_space_unmap(iot, ioh, AHC_ISA_IOSIZE);
if (irq < 0)
return (0);
if (ia->ia_irq != IRQUNK &&
ia->ia_irq != irq) {
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printf("ahc_isa_match: irq mismatch (kernel %d, card %d)\n",
ia->ia_irq, irq);
return (0);
}
/* We have a match */
ia->ia_iobase = iobase;
ia->ia_irq = irq;
ia->ia_iosize = AHC_ISA_IOSIZE;
ia->ia_msize = 0;
return (1);
}
/*
* Check the slots looking for a board we recognise
* If we find one, note it's address (slot) and call
* the actual probe routine to check it out.
*/
int
ahc_isa_probe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct isa_attach_args *ia = aux;
struct ahc_isa_slot *as;
if (ahc_isa_slot_initialized == 0) {
LIST_INIT(&ahc_isa_all_slots);
ahc_isa_slot_initialized = 1;
}
if (ia->ia_iobase != IOBASEUNK)
return (ahc_isa_match(ia, ia->ia_iobase));
/*
* Find this bus's state. If we don't yet have a slot
* marker, allocate and initialize one.
*/
for (as = ahc_isa_all_slots.lh_first; as != NULL;
as = as->link.le_next)
if (as->bus == parent->dv_unit)
goto found_slot_marker;
/*
* Don't have one, so make one.
*/
as = (struct ahc_isa_slot *)
malloc(sizeof(struct ahc_isa_slot), M_DEVBUF, M_NOWAIT);
if (as == NULL)
panic("ahc_isa_probe: can't allocate slot marker");
as->bus = parent->dv_unit;
as->slot = AHC_ISA_MIN_SLOT;
LIST_INSERT_HEAD(&ahc_isa_all_slots, as, link);
found_slot_marker:
for (; as->slot <= AHC_ISA_MAX_SLOT; as->slot++) {
if (ahc_isa_match(ia, EISA_SLOT_ADDR(as->slot) +
AHC_ISA_SLOT_OFFSET)) {
as->slot++; /* next slot to search */
return (1);
}
}
/* No matching cards were found. */
return (0);
}
void
ahc_isa_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
ahc_type type;
struct ahc_data *ahc = (void *)self;
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
int irq;
char idstring[EISA_IDSTRINGLEN];
const char *model;
if (bus_space_map(iot, ia->ia_iobase, ia->ia_iosize, 0, &ioh))
panic("ahc_isa_attach: could not map slot I/O addresses");
if (!ahc_isa_idstring(iot, ioh, idstring))
panic("ahc_isa_attach: could not read ID string");
if ((irq = ahc_isa_irq(iot, ioh)) < 0)
panic("ahc_isa_attach: ahc_isa_irq failed!");
if (strcmp(idstring, "ADP7756") == 0) {
model = EISA_PRODUCT_ADP7756;
type = AHC_284;
} else if (strcmp(idstring, "ADP7757") == 0) {
model = EISA_PRODUCT_ADP7757;
type = AHC_284;
} else {
panic("ahc_isa_attach: Unknown device type %s\n", idstring);
}
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printf(": %s\n", model);
ahc_construct(ahc, iot, ioh, type, AHC_FNONE);
#ifdef DEBUG
/*
* Tell the user what type of interrupts we're using.
* usefull for debugging irq problems
*/
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printf( "%s: Using %s Interrupts\n", ahc_name(ahc),
ahc->pause & IRQMS ? "Level Sensitive" : "Edge Triggered");
#endif
/*
* Now that we know we own the resources we need, do the
* card initialization.
*
* First, the aic7770 card specific setup.
*/
/* XXX
* On AHA-284x,
* all values are automagically intialized at
* POST for these cards, so we can always rely
* on the Scratch Ram values. However, we should
* read the SEEPROM here (Dan has the code to do
* it) so we can say what kind of translation the
* BIOS is using. Printing out the geometry could
* save a lot of users the grief of failed installs.
*/
/*
* See if we have a Rev E or higher aic7770. Anything below a
* Rev E will have a R/O autoflush disable configuration bit.
* It's still not clear exactly what is differenent about the Rev E.
* We think it allows 8 bit entries in the QOUTFIFO to support
* "paging" SCBs so you can have more than 4 commands active at
* once.
*/
{
char *id_string;
u_char sblkctl;
u_char sblkctl_orig;
sblkctl_orig = AHC_INB(ahc, SBLKCTL);
sblkctl = sblkctl_orig ^ AUTOFLUSHDIS;
AHC_OUTB(ahc, SBLKCTL, sblkctl);
sblkctl = AHC_INB(ahc, SBLKCTL);
if(sblkctl != sblkctl_orig)
{
id_string = "aic7770 >= Rev E, ";
/*
* Ensure autoflush is enabled
*/
sblkctl &= ~AUTOFLUSHDIS;
AHC_OUTB(ahc, SBLKCTL, sblkctl);
/* Allow paging on this adapter */
ahc->flags |= AHC_PAGESCBS;
}
else
id_string = "aic7770 <= Rev C, ";
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printf("%s: %s", ahc_name(ahc), id_string);
}
/* Setup the FIFO threshold and the bus off time */
{
u_char hostconf = AHC_INB(ahc, HOSTCONF);
AHC_OUTB(ahc, BUSSPD, hostconf & DFTHRSH);
AHC_OUTB(ahc, BUSTIME, (hostconf << 2) & BOFF);
}
/*
* Generic aic7xxx initialization.
*/
if(ahc_init(ahc)){
ahc_free(ahc);
return;
}
/*
* Enable the board's BUS drivers
*/
AHC_OUTB(ahc, BCTL, ENABLE);
/*
* The IRQMS bit enables level sensitive interrupts only allow
* IRQ sharing if its set.
*/
ahc->sc_ih = isa_intr_establish(ia->ia_ic, irq,
ahc->pause & IRQMS ? IST_LEVEL : IST_EDGE, IPL_BIO, ahc_intr, ahc);
if (ahc->sc_ih == NULL) {
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printf("%s: couldn't establish interrupt\n",
ahc->sc_dev.dv_xname);
ahc_free(ahc);
return;
}
/* Attach sub-devices - always succeeds */
ahc_attach(ahc);
}