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NetBSD/sys/arch/alpha/pci/pci_eb164.c

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/* $NetBSD: pci_eb164.c,v 1.8 1997/07/19 09:49:55 cgd Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: 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 <machine/options.h> /* Config options headers */
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: pci_eb164.c,v 1.8 1997/07/19 09:49:55 cgd Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/syslog.h>
#include <vm/vm.h>
#include <machine/autoconf.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/ciareg.h>
#include <alpha/pci/ciavar.h>
#include <alpha/pci/pci_eb164.h>
#ifndef EVCNT_COUNTERS
#include <machine/intrcnt.h>
#endif
#include "sio.h"
#if NSIO
#include <alpha/pci/siovar.h>
#endif
int dec_eb164_intr_map __P((void *, pcitag_t, int, int,
pci_intr_handle_t *));
const char *dec_eb164_intr_string __P((void *, pci_intr_handle_t));
void *dec_eb164_intr_establish __P((void *, pci_intr_handle_t,
int, int (*func)(void *), void *));
void dec_eb164_intr_disestablish __P((void *, void *));
#define EB164_SIO_IRQ 4
#define EB164_MAX_IRQ 24
#define PCI_STRAY_MAX 5
struct alpha_shared_intr *eb164_pci_intr;
#ifdef EVCNT_COUNTERS
struct evcnt eb164_intr_evcnt;
#endif
bus_space_tag_t eb164_intrgate_iot;
bus_space_handle_t eb164_intrgate_ioh;
void eb164_iointr __P((void *framep, unsigned long vec));
extern void eb164_intr_enable __P((int irq)); /* pci_eb164_intr.S */
extern void eb164_intr_disable __P((int irq)); /* pci_eb164_intr.S */
void
pci_eb164_pickintr(ccp)
struct cia_config *ccp;
{
bus_space_tag_t iot = ccp->cc_iot;
pci_chipset_tag_t pc = &ccp->cc_pc;
int i;
pc->pc_intr_v = ccp;
pc->pc_intr_map = dec_eb164_intr_map;
pc->pc_intr_string = dec_eb164_intr_string;
pc->pc_intr_establish = dec_eb164_intr_establish;
pc->pc_intr_disestablish = dec_eb164_intr_disestablish;
eb164_intrgate_iot = iot;
if (bus_space_map(eb164_intrgate_iot, 0x804, 3, 0,
&eb164_intrgate_ioh) != 0)
panic("pci_eb164_pickintr: couldn't map interrupt PLD");
for (i = 0; i < EB164_MAX_IRQ; i++)
eb164_intr_disable(i);
eb164_pci_intr = alpha_shared_intr_alloc(EB164_MAX_IRQ);
for (i = 0; i < EB164_MAX_IRQ; i++)
alpha_shared_intr_set_maxstrays(eb164_pci_intr, i,
PCI_STRAY_MAX);
#if NSIO
sio_intr_setup(iot);
eb164_intr_enable(EB164_SIO_IRQ);
#endif
set_iointr(eb164_iointr);
}
int
dec_eb164_intr_map(ccv, bustag, buspin, line, ihp)
void *ccv;
pcitag_t bustag;
int buspin, line;
pci_intr_handle_t *ihp;
{
struct cia_config *ccp = ccv;
pci_chipset_tag_t pc = &ccp->cc_pc;
int device;
int eb164_irq, pinbase, pinoff;
#ifndef DIAGNOSTIC
pinbase = pinoff = 0; /* XXX gcc -Wuninitialized */
#endif
if (buspin == 0) {
/* No IRQ used. */
return 1;
}
if (buspin > 4) {
printf("pci_map_int: bad interrupt pin %d\n", buspin);
return 1;
}
alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL);
switch (device) {
#if 0 /* THIS CODE SHOULD NEVER BE CALLED FOR THE SIO */
case 8: /* SIO */
eb164_irq = 4;
break;
#endif
case 11:
eb164_irq = 5; /* IDE */
break;
case 5:
case 6:
case 7:
case 9:
switch (buspin) {
case 1:
pinbase = 0;
break;
case 2:
case 3:
case 4:
pinbase = (buspin * 4) - 1;
break;
#ifdef DIAGNOSTIC
default:
panic("dec_eb164_intr_map: slot buspin switch");
#endif
};
switch (device) {
case 5:
pinoff = 2;
break;
case 6:
case 7:
case 9:
pinoff = device - 6;
break;
#ifdef DIAGNOSTIC
default:
panic("dec_eb164_intr_map: slot device switch");
#endif
}
eb164_irq = pinoff + pinbase;
break;
default:
panic("pci_eb164_map_int: invalid device number %d\n",
device);
}
if (eb164_irq > EB164_MAX_IRQ)
panic("pci_eb164_map_int: eb164_irq too large (%d)\n",
eb164_irq);
*ihp = eb164_irq;
return (0);
}
const char *
dec_eb164_intr_string(ccv, ih)
void *ccv;
pci_intr_handle_t ih;
{
#if 0
struct cia_config *ccp = ccv;
#endif
static char irqstr[15]; /* 11 + 2 + NULL + sanity */
if (ih > EB164_MAX_IRQ)
panic("dec_eb164_intr_string: bogus eb164 IRQ 0x%x\n", ih);
sprintf(irqstr, "eb164 irq %d", ih);
return (irqstr);
}
void *
dec_eb164_intr_establish(ccv, ih, level, func, arg)
void *ccv, *arg;
pci_intr_handle_t ih;
int level;
int (*func) __P((void *));
{
#if 0
struct cia_config *ccp = ccv;
#endif
void *cookie;
if (ih > EB164_MAX_IRQ)
panic("dec_eb164_intr_establish: bogus eb164 IRQ 0x%x\n", ih);
cookie = alpha_shared_intr_establish(eb164_pci_intr, ih, IST_LEVEL,
level, func, arg, "eb164 irq");
if (cookie != NULL && alpha_shared_intr_isactive(eb164_pci_intr, ih))
eb164_intr_enable(ih);
return (cookie);
}
void
dec_eb164_intr_disestablish(ccv, cookie)
void *ccv, *cookie;
{
#if 0
struct cia_config *ccp = ccv;
#endif
panic("dec_eb164_intr_disestablish not implemented"); /* XXX */
}
void
eb164_iointr(framep, vec)
void *framep;
unsigned long vec;
{
int irq;
if (vec >= 0x900) {
if (vec >= 0x900 + (EB164_MAX_IRQ << 4))
panic("eb164_iointr: vec 0x%x out of range\n", vec);
irq = (vec - 0x900) >> 4;
#ifdef EVCNT_COUNTERS
eb164_intr_evcnt.ev_count++;
#else
if (EB164_MAX_IRQ != INTRCNT_EB164_IRQ_LEN)
panic("eb164 interrupt counter sizes inconsistent");
intrcnt[INTRCNT_EB164_IRQ + irq]++;
#endif
if (!alpha_shared_intr_dispatch(eb164_pci_intr, irq)) {
alpha_shared_intr_stray(eb164_pci_intr, irq,
"eb164 irq");
if (eb164_pci_intr[irq].intr_nstrays ==
eb164_pci_intr[irq].intr_maxstrays)
eb164_intr_disable(irq);
}
return;
}
#if NSIO
if (vec >= 0x800) {
sio_iointr(framep, vec);
return;
}
#endif
panic("eb164_iointr: weird vec 0x%x\n", vec);
}
#if 0 /* THIS DOES NOT WORK! see pci_eb164_intr.S. */
u_int8_t eb164_intr_mask[3] = { 0xff, 0xff, 0xff };
void
eb164_intr_enable(irq)
int irq;
{
int byte = (irq / 8), bit = (irq % 8);
#if 1
printf("eb164_intr_enable: enabling %d (%d:%d)\n", irq, byte, bit);
#endif
eb164_intr_mask[byte] &= ~(1 << bit);
bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte,
eb164_intr_mask[byte]);
}
void
eb164_intr_disable(irq)
int irq;
{
int byte = (irq / 8), bit = (irq % 8);
#if 1
printf("eb164_intr_disable: disabling %d (%d:%d)\n", irq, byte, bit);
#endif
eb164_intr_mask[byte] |= (1 << bit);
bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte,
eb164_intr_mask[byte]);
}
#endif
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