NetBSD/sys/arch/alpha/tc/tcds.c

416 lines
10 KiB
C

/* $NetBSD: tcds.c,v 1.15 1996/10/13 03:00:41 christos Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Keith Bostic, Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/pte.h>
#include <machine/rpb.h>
#ifndef EVCNT_COUNTERS
#include <machine/intrcnt.h>
#endif
#include <dev/tc/tcreg.h>
#include <dev/tc/tcvar.h>
#include <alpha/tc/tcdsreg.h>
#include <alpha/tc/tcdsvar.h>
struct tcds_softc {
struct device sc_dv;
tc_addr_t sc_base;
void *sc_cookie;
volatile u_int32_t *sc_cir;
volatile u_int32_t *sc_imer;
struct tcds_slotconfig sc_slots[2];
};
/* Definition of the driver for autoconfig. */
int tcdsmatch __P((struct device *, void *, void *));
void tcdsattach __P((struct device *, struct device *, void *));
int tcdsprint(void *, const char *);
struct cfattach tcds_ca = {
sizeof(struct tcds_softc), tcdsmatch, tcdsattach,
};
struct cfdriver tcds_cd = {
NULL, "tcds", DV_DULL,
};
/*static*/ int tcds_intr __P((void *));
/*static*/ int tcds_intrnull __P((void *));
int
tcdsmatch(parent, cfdata, aux)
struct device *parent;
void *cfdata;
void *aux;
{
struct tc_attach_args *ta = aux;
extern int cputype;
/* Make sure that we're looking for this type of device. */
if (strncmp("PMAZ-DS ", ta->ta_modname, TC_ROM_LLEN))
return (0);
/* PMAZ-FS? */
/* Check that it can actually exist. */
if ((cputype != ST_DEC_3000_500) && (cputype != ST_DEC_3000_300))
panic("tcdsmatch: how did we get here?");
return (1);
}
void
tcdsattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct tcds_softc *sc = (struct tcds_softc *)self;
struct tc_attach_args *ta = aux;
struct tcdsdev_attach_args tcdsdev;
struct tcds_slotconfig *slotc;
int i;
extern int cputype;
printf("\n");
sc->sc_base = ta->ta_addr;
sc->sc_cookie = ta->ta_cookie;
sc->sc_cir = TCDS_REG(sc->sc_base, TCDS_CIR);
sc->sc_imer = TCDS_REG(sc->sc_base, TCDS_IMER);
tc_intr_establish(parent, sc->sc_cookie, TC_IPL_BIO, tcds_intr, sc);
/*
* XXX
* IMER apparently has some random (or, not so random, but still
* not useful) bits set in it when the system boots. Clear it.
*/
*sc->sc_imer = 0;
alpha_mb();
/* XXX Initial contents of CIR? */
/*
* Set up the per-slot defintions for later use.
*/
/* fill in common information first */
for (i = 0; i < 2; i++) {
slotc = &sc->sc_slots[i];
bzero(slotc, sizeof *slotc); /* clear everything */
slotc->sc_slot = i;
slotc->sc_tcds = sc;
slotc->sc_esp = NULL;
slotc->sc_intrhand = tcds_intrnull;
slotc->sc_intrarg = (void *)(long)i;
}
/* information for slot 0 */
slotc = &sc->sc_slots[0];
slotc->sc_resetbits = TCDS_CIR_SCSI0_RESET;
slotc->sc_intrmaskbits =
TCDS_IMER_SCSI0_MASK | TCDS_IMER_SCSI0_ENB;
slotc->sc_intrbits = TCDS_CIR_SCSI0_INT;
slotc->sc_dmabits = TCDS_CIR_SCSI0_DMAENA;
slotc->sc_errorbits = 0; /* XXX */
slotc->sc_sda = TCDS_REG(sc->sc_base, TCDS_SCSI0_DMA_ADDR);
slotc->sc_dic = TCDS_REG(sc->sc_base, TCDS_SCSI0_DMA_INTR);
slotc->sc_dud0 = TCDS_REG(sc->sc_base, TCDS_SCSI0_DMA_DUD0);
slotc->sc_dud1 = TCDS_REG(sc->sc_base, TCDS_SCSI0_DMA_DUD1);
/* information for slot 1 */
slotc = &sc->sc_slots[1];
slotc->sc_resetbits = TCDS_CIR_SCSI1_RESET;
slotc->sc_intrmaskbits =
TCDS_IMER_SCSI1_MASK | TCDS_IMER_SCSI1_ENB;
slotc->sc_intrbits = TCDS_CIR_SCSI1_INT;
slotc->sc_dmabits = TCDS_CIR_SCSI1_DMAENA;
slotc->sc_errorbits = 0; /* XXX */
slotc->sc_sda = TCDS_REG(sc->sc_base, TCDS_SCSI1_DMA_ADDR);
slotc->sc_dic = TCDS_REG(sc->sc_base, TCDS_SCSI1_DMA_INTR);
slotc->sc_dud0 = TCDS_REG(sc->sc_base, TCDS_SCSI1_DMA_DUD0);
slotc->sc_dud1 = TCDS_REG(sc->sc_base, TCDS_SCSI1_DMA_DUD1);
/* find the hardware attached to the TCDS ASIC */
strncpy(tcdsdev.tcdsda_modname, "PMAZ-AA ", TC_ROM_LLEN);
tcdsdev.tcdsda_slot = 0;
tcdsdev.tcdsda_offset = 0;
tcdsdev.tcdsda_addr = (tc_addr_t)
TC_DENSE_TO_SPARSE(sc->sc_base + TCDS_SCSI0_OFFSET);
tcdsdev.tcdsda_cookie = (void *)(long)0;
tcdsdev.tcdsda_sc = &sc->sc_slots[0];
tcdsdev.tcdsda_id = 7; /* XXX */
tcdsdev.tcdsda_freq = 25000000; /* XXX */
tcds_scsi_reset(tcdsdev.tcdsda_sc);
config_found(self, &tcdsdev, tcdsprint);
/* the second SCSI chip isn't present on the 3000/300 series. */
if (cputype != ST_DEC_3000_300) {
strncpy(tcdsdev.tcdsda_modname, "PMAZ-AA ",
TC_ROM_LLEN);
tcdsdev.tcdsda_slot = 1;
tcdsdev.tcdsda_offset = 0;
tcdsdev.tcdsda_addr = (tc_addr_t)
TC_DENSE_TO_SPARSE(sc->sc_base + TCDS_SCSI1_OFFSET);
tcdsdev.tcdsda_cookie = (void *)(long)1;
tcdsdev.tcdsda_sc = &sc->sc_slots[1];
tcdsdev.tcdsda_id = 7; /* XXX */
tcdsdev.tcdsda_freq = 25000000; /* XXX */
tcds_scsi_reset(tcdsdev.tcdsda_sc);
config_found(self, &tcdsdev, tcdsprint);
}
}
int
tcdsprint(aux, pnp)
void *aux;
const char *pnp;
{
struct tc_attach_args *ta = aux;
if (pnp)
printf("%s at %s", ta->ta_modname, pnp);
printf(" slot %d", ta->ta_slot);
return (UNCONF);
}
void
tcds_intr_establish(tcds, cookie, level, func, arg)
struct device *tcds;
void *cookie, *arg;
tc_intrlevel_t level;
int (*func) __P((void *));
{
struct tcds_softc *sc = (struct tcds_softc *)tcds;
u_long slot;
slot = (u_long)cookie;
#ifdef DIAGNOSTIC
/* XXX check cookie. */
#endif
if (sc->sc_slots[slot].sc_intrhand != tcds_intrnull)
panic("tcds_intr_establish: cookie %d twice", slot);
sc->sc_slots[slot].sc_intrhand = func;
sc->sc_slots[slot].sc_intrarg = arg;
tcds_scsi_reset(&sc->sc_slots[slot]);
}
void
tcds_intr_disestablish(tcds, cookie)
struct device *tcds;
void *cookie;
{
struct tcds_softc *sc = (struct tcds_softc *)tcds;
u_long slot;
slot = (u_long)cookie;
#ifdef DIAGNOSTIC
/* XXX check cookie. */
#endif
if (sc->sc_slots[slot].sc_intrhand == tcds_intrnull)
panic("tcds_intr_disestablish: cookie %d missing intr",
slot);
sc->sc_slots[slot].sc_intrhand = tcds_intrnull;
sc->sc_slots[slot].sc_intrarg = (void *)slot;
tcds_dma_enable(&sc->sc_slots[slot], 0);
tcds_scsi_enable(&sc->sc_slots[slot], 0);
}
int
tcds_intrnull(val)
void *val;
{
panic("tcds_intrnull: uncaught TCDS intr for cookie %ld\n",
(u_long)val);
}
void
tcds_scsi_reset(sc)
struct tcds_slotconfig *sc;
{
tcds_dma_enable(sc, 0);
tcds_scsi_enable(sc, 0);
TCDS_CIR_CLR(*sc->sc_tcds->sc_cir, sc->sc_resetbits);
alpha_mb();
DELAY(1);
TCDS_CIR_SET(*sc->sc_tcds->sc_cir, sc->sc_resetbits);
alpha_mb();
tcds_scsi_enable(sc, 1);
tcds_dma_enable(sc, 1);
}
void
tcds_scsi_enable(sc, on)
struct tcds_slotconfig *sc;
int on;
{
if (on)
*sc->sc_tcds->sc_imer |= sc->sc_intrmaskbits;
else
*sc->sc_tcds->sc_imer &= ~sc->sc_intrmaskbits;
alpha_mb();
}
void
tcds_dma_enable(sc, on)
struct tcds_slotconfig *sc;
int on;
{
/* XXX Clear/set IOSLOT/PBS bits. */
if (on)
TCDS_CIR_SET(*sc->sc_tcds->sc_cir, sc->sc_dmabits);
else
TCDS_CIR_CLR(*sc->sc_tcds->sc_cir, sc->sc_dmabits);
alpha_mb();
}
int
tcds_scsi_isintr(sc, clear)
struct tcds_slotconfig *sc;
int clear;
{
if ((*sc->sc_tcds->sc_cir & sc->sc_intrbits) != 0) {
if (clear) {
TCDS_CIR_CLR(*sc->sc_tcds->sc_cir, sc->sc_intrbits);
alpha_mb();
}
return (1);
} else
return (0);
}
int
tcds_scsi_iserr(sc)
struct tcds_slotconfig *sc;
{
return ((*sc->sc_tcds->sc_cir & sc->sc_errorbits) != 0);
}
int
tcds_intr(val)
void *val;
{
struct tcds_softc *sc;
u_int32_t ir;
sc = val;
/*
* XXX
* Copy and clear (gag!) the interrupts.
*/
ir = *sc->sc_cir;
alpha_mb();
TCDS_CIR_CLR(*sc->sc_cir, TCDS_CIR_ALLINTR);
alpha_mb();
tc_syncbus();
alpha_mb();
#ifdef EVCNT_COUNTERS
/* No interrupt counting via evcnt counters */
XXX BREAK HERE XXX
#else
#define INCRINTRCNT(slot) intrcnt[INTRCNT_TCDS + slot]++
#endif
#define CHECKINTR(slot) \
if (ir & sc->sc_slots[slot].sc_intrbits) { \
INCRINTRCNT(slot); \
(void)(*sc->sc_slots[slot].sc_intrhand) \
(sc->sc_slots[slot].sc_intrarg); \
}
CHECKINTR(0);
CHECKINTR(1);
#undef CHECKINTR
#ifdef DIAGNOSTIC
/*
* Interrupts not currently handled, but would like to know if they
* occur.
*
* XXX
* Don't know if we have to set the interrupt mask and enable bits
* in the IMER to allow some of them to happen?
*/
#define PRINTINTR(msg, bits) \
if (ir & bits) \
printf(msg);
PRINTINTR("SCSI0 DREQ interrupt.\n", TCDS_CIR_SCSI0_DREQ);
PRINTINTR("SCSI1 DREQ interrupt.\n", TCDS_CIR_SCSI1_DREQ);
PRINTINTR("SCSI0 prefetch interrupt.\n", TCDS_CIR_SCSI0_PREFETCH);
PRINTINTR("SCSI1 prefetch interrupt.\n", TCDS_CIR_SCSI1_PREFETCH);
PRINTINTR("SCSI0 DMA error.\n", TCDS_CIR_SCSI0_DMA);
PRINTINTR("SCSI1 DMA error.\n", TCDS_CIR_SCSI1_DMA);
PRINTINTR("SCSI0 DB parity error.\n", TCDS_CIR_SCSI0_DB);
PRINTINTR("SCSI1 DB parity error.\n", TCDS_CIR_SCSI1_DB);
PRINTINTR("SCSI0 DMA buffer parity error.\n", TCDS_CIR_SCSI0_DMAB_PAR);
PRINTINTR("SCSI1 DMA buffer parity error.\n", TCDS_CIR_SCSI1_DMAB_PAR);
PRINTINTR("SCSI0 DMA read parity error.\n", TCDS_CIR_SCSI0_DMAR_PAR);
PRINTINTR("SCSI1 DMA read parity error.\n", TCDS_CIR_SCSI1_DMAR_PAR);
PRINTINTR("TC write parity error.\n", TCDS_CIR_TCIOW_PAR);
PRINTINTR("TC I/O address parity error.\n", TCDS_CIR_TCIOA_PAR);
#undef PRINTINTR
#endif
/*
* XXX
* The MACH source had this, with the comment:
* This is wrong, but machine keeps dying.
*/
DELAY(1);
return (1);
}