NetBSD/sys/dev/eisa/uha_eisa.c

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/* $NetBSD: uha_eisa.c,v 1.6 1996/11/15 22:53:39 jonathan Exp $ */
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/*
* Copyright (c) 1994, 1996 Charles M. Hannum. 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.
* 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 Charles M. Hannum.
* 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 ``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 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.
*/
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#include <sys/types.h>
#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <dev/eisa/eisavar.h>
#include <dev/eisa/eisadevs.h>
#include <dev/ic/uhareg.h>
#include <dev/ic/uhavar.h>
#define UHA_EISA_SLOT_OFFSET 0xc80
#define UHA_EISA_IOSIZE 0x020
int uha_eisa_match __P((struct device *, void *, void *));
void uha_eisa_attach __P((struct device *, struct device *, void *));
struct cfattach uha_eisa_ca = {
sizeof(struct uha_softc), uha_eisa_match, uha_eisa_attach
};
#ifndef DDB
#define Debugger() panic("should call debugger here (uha_eisa.c)")
#endif /* ! DDB */
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#define KVTOPHYS(x) vtophys(x)
int u24_find __P((bus_space_tag_t, bus_space_handle_t, struct uha_softc *));
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void u24_start_mbox __P((struct uha_softc *, struct uha_mscp *));
int u24_poll __P((struct uha_softc *, struct scsi_xfer *, int));
int u24_intr __P((void *));
void u24_init __P((struct uha_softc *));
/*
* 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
uha_eisa_match(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct eisa_attach_args *ea = aux;
bus_space_tag_t iot = ea->ea_iot;
bus_space_handle_t ioh;
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int rv;
/* must match one of our known ID strings */
if (strncmp(ea->ea_idstring, "USC024", 6))
return (0);
if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
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return (0);
rv = u24_find(iot, ioh, NULL);
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bus_space_unmap(iot, ioh, UHA_EISA_IOSIZE);
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return (rv);
}
/*
* Attach all the sub-devices we can find
*/
void
uha_eisa_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct eisa_attach_args *ea = aux;
struct uha_softc *sc = (void *)self;
bus_space_tag_t iot = ea->ea_iot;
bus_space_handle_t ioh;
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eisa_chipset_tag_t ec = ea->ea_ec;
eisa_intr_handle_t ih;
const char *model, *intrstr;
if (!strncmp(ea->ea_idstring, "USC024", 6))
model = EISA_PRODUCT_USC0240;
else
model = "unknown model!";
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printf(": %s\n", model);
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if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
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panic("uha_attach: could not map I/O addresses");
sc->sc_iot = iot;
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sc->sc_ioh = ioh;
if (!u24_find(iot, ioh, sc))
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panic("uha_attach: u24_find failed!");
if (eisa_intr_map(ec, sc->sc_irq, &ih)) {
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printf("%s: couldn't map interrupt (%d)\n",
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sc->sc_dev.dv_xname, sc->sc_irq);
return;
}
intrstr = eisa_intr_string(ec, ih);
sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
u24_intr, sc);
if (sc->sc_ih == NULL) {
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printf("%s: couldn't establish interrupt",
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sc->sc_dev.dv_xname);
if (intrstr != NULL)
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printf(" at %s", intrstr);
printf("\n");
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return;
}
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printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
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/* Save function pointers for later use. */
sc->start_mbox = u24_start_mbox;
sc->poll = u24_poll;
sc->init = u24_init;
uha_attach(sc);
}
int
u24_find(iot, ioh, sc)
bus_space_tag_t iot;
bus_space_handle_t ioh;
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struct uha_softc *sc;
{
u_int8_t config0, config1, config2;
int irq, drq;
int resetcount = 4000; /* 4 secs? */
config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0);
config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1);
config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2);
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if ((config0 & U24_MAGIC1) == 0 ||
(config1 & U24_MAGIC2) == 0)
return (0);
drq = -1;
switch (config0 & U24_IRQ_MASK) {
case U24_IRQ10:
irq = 10;
break;
case U24_IRQ11:
irq = 11;
break;
case U24_IRQ14:
irq = 14;
break;
case U24_IRQ15:
irq = 15;
break;
default:
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printf("u24_find: illegal irq setting %x\n",
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config0 & U24_IRQ_MASK);
return (0);
}
bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST);
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while (--resetcount) {
if (bus_space_read_1(iot, ioh, U24_LINT))
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break;
delay(1000); /* 1 mSec per loop */
}
if (!resetcount) {
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printf("u24_find: board timed out during reset\n");
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return (0);
}
/* if we want to fill in softc, do so now */
if (sc != NULL) {
sc->sc_irq = irq;
sc->sc_drq = drq;
sc->sc_scsi_dev = config2 & U24_HOSTID_MASK;
}
return (1);
}
void
u24_start_mbox(sc, mscp)
struct uha_softc *sc;
struct uha_mscp *mscp;
{
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
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int spincount = 100000; /* 1s should be enough */
while (--spincount) {
if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0)
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break;
delay(100);
}
if (!spincount) {
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printf("%s: uha_start_mbox, board not responding\n",
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sc->sc_dev.dv_xname);
Debugger();
}
bus_space_write_4(iot, ioh, U24_OGMPTR, KVTOPHYS(mscp));
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if (mscp->flags & MSCP_ABORT)
bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80);
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else
bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01);
bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL);
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if ((mscp->xs->flags & SCSI_POLL) == 0)
timeout(uha_timeout, mscp, (mscp->timeout * hz) / 1000);
}
int
u24_poll(sc, xs, count)
struct uha_softc *sc;
struct scsi_xfer *xs;
int count;
{
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
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while (count) {
/*
* If we had interrupts enabled, would we
* have got an interrupt?
*/
if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP)
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u24_intr(sc);
if (xs->flags & ITSDONE)
return (0);
delay(1000);
count--;
}
return (1);
}
int
u24_intr(arg)
void *arg;
{
struct uha_softc *sc = arg;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
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struct uha_mscp *mscp;
u_char uhastat;
u_long mboxval;
#ifdef UHADEBUG
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printf("%s: uhaintr ", sc->sc_dev.dv_xname);
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#endif /*UHADEBUG */
if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
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return (0);
for (;;) {
/*
* First get all the information and then
* acknowledge the interrupt
*/
uhastat = bus_space_read_1(iot, ioh, U24_SINT);
mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR);
bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK);
bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
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#ifdef UHADEBUG
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printf("status = 0x%x ", uhastat);
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#endif /*UHADEBUG*/
/*
* Process the completed operation
*/
mscp = uha_mscp_phys_kv(sc, mboxval);
if (!mscp) {
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printf("%s: BAD MSCP RETURNED!\n",
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sc->sc_dev.dv_xname);
continue; /* whatever it was, it'll timeout */
}
untimeout(uha_timeout, mscp);
uha_done(sc, mscp);
if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
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return (1);
}
}
void
u24_init(sc)
struct uha_softc *sc;
{
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
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/* free OGM and ICM */
bus_space_write_1(iot, ioh, U24_OGMCMD, 0);
bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
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/* make sure interrupts are enabled */
#ifdef UHADEBUG
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printf("u24_init: lmask=%02x, smask=%02x\n",
bus_space_read_1(iot, ioh, U24_LMASK),
bus_space_read_1(iot, ioh, U24_SMASK));
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#endif
bus_space_write_1(iot, ioh, U24_LMASK, 0xd2); /* XXX */
bus_space_write_1(iot, ioh, U24_SMASK, 0x92); /* XXX */
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}