/* $NetBSD: pci_2100_a50.c,v 1.44 2021/06/25 13:41:33 thorpej 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
[email protected]
* 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/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: pci_2100_a50.c,v 1.44 2021/06/25 13:41:33 thorpej Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <sys/bus.h>
#include <machine/intr.h>
#include <dev/isa/isavar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/apecsvar.h>
#include <alpha/pci/siovar.h>
#include <alpha/pci/sioreg.h>
#include "sio.h"
static int dec_2100_a50_intr_map(const struct pci_attach_args *,
pci_intr_handle_t *);
static void
pci_2100_a50_pickintr(void *core, bus_space_tag_t iot, bus_space_tag_t memt,
pci_chipset_tag_t pc)
{
pc->pc_intr_v = core;
pc->pc_intr_map = dec_2100_a50_intr_map;
pc->pc_intr_string = sio_pci_intr_string;
pc->pc_intr_evcnt = sio_pci_intr_evcnt;
pc->pc_intr_establish = sio_pci_intr_establish;
pc->pc_intr_disestablish = sio_pci_intr_disestablish;
/* Not supported on 2100 A50. */
pc->pc_pciide_compat_intr_establish = NULL;
#if NSIO
sio_intr_setup(pc, iot);
#else
panic("pci_2100_a50_pickintr: no I/O interrupt handler (no sio)");
#endif
}
ALPHA_PCI_INTR_INIT(ST_DEC_2100_A50, pci_2100_a50_pickintr)
int
dec_2100_a50_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
pcitag_t bustag = pa->pa_intrtag;
int buspin = pa->pa_intrpin;
pci_chipset_tag_t pc = pa->pa_pc;
int device, pirq;
#ifndef DIAGNOSTIC
pirq = 0; /* XXX gcc -Wuninitialized */
#endif
if (buspin == 0) {
/* No IRQ used. */
return 1;
}
if (buspin < 0 || buspin > 4) {
printf("dec_2100_a50_intr_map: bad interrupt pin %d\n",
buspin);
return 1;
}
pci_decompose_tag(pc, bustag, NULL, &device, NULL);
switch (device) {
case 6: /* NCR SCSI */
pirq = 3;
break;
case 11: /* slot 1 */
case 14: /* slot 3 */
switch (buspin) {
case PCI_INTERRUPT_PIN_A:
case PCI_INTERRUPT_PIN_D:
pirq = 0;
break;
case PCI_INTERRUPT_PIN_B:
pirq = 2;
break;
case PCI_INTERRUPT_PIN_C:
pirq = 1;
break;
#ifdef DIAGNOSTIC
default: /* XXX gcc -Wuninitialized */
panic("dec_2100_a50_intr_map bogus PCI pin %d",
buspin);
#endif
};
break;
case 12: /* slot 2 */
switch (buspin) {
case PCI_INTERRUPT_PIN_A:
case PCI_INTERRUPT_PIN_D:
pirq = 1;
break;
case PCI_INTERRUPT_PIN_B:
pirq = 0;
break;
case PCI_INTERRUPT_PIN_C:
pirq = 2;
break;
#ifdef DIAGNOSTIC
default: /* XXX gcc -Wuninitialized */
panic("dec_2100_a50_intr_map bogus PCI pin %d",
buspin);
#endif
};
break;
case 13: /* slot 3 */
switch (buspin) {
case PCI_INTERRUPT_PIN_A:
case PCI_INTERRUPT_PIN_D:
pirq = 2;
break;
case PCI_INTERRUPT_PIN_B:
pirq = 1;
break;
case PCI_INTERRUPT_PIN_C:
pirq = 0;
break;
#ifdef DIAGNOSTIC
default: /* XXX gcc -Wuninitialized */
panic("dec_2100_a50_intr_map bogus PCI pin %d",
buspin);
#endif
};
break;
default:
printf("dec_2100_a50_intr_map: weird device number %d\n",
device);
return 1;
}
#if 0
printf("pci_2100_a50_intr_map: device %d pin %c: pirq %d\n",
device, '@' + buspin, pirq);
#endif
return sio_pirq_intr_map(pc, pirq, ihp);
}
