/* $NetBSD: pci_1000.c,v 1.31 2021/07/04 22:42:36 thorpej Exp $ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is based on pci_kn20aa.c, written by Chris G. Demetriou at
* Carnegie-Mellon University. Platform support for Mikasa and Mikasa/Pinnacle
* (Pinkasa) by Ross Harvey with copyright assignment by permission of Avalon
* Computer Systems, Inc.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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_1000.c,v 1.31 2021/07/04 22:42:36 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 <sys/syslog.h>
#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include "sio.h"
#if NSIO > 0 || NPCEB > 0
#include <alpha/pci/siovar.h>
#endif
static bus_space_tag_t another_mystery_icu_iot;
static bus_space_handle_t another_mystery_icu_ioh;
static int dec_1000_intr_map(const struct pci_attach_args *,
pci_intr_handle_t *);
#define PCI_NIRQ 16
#define PCI_STRAY_MAX 5
static void dec_1000_enable_intr(pci_chipset_tag_t, int irq);
static void dec_1000_disable_intr(pci_chipset_tag_t, int irq);
static void pci_1000_imi(void);
static void
pci_1000_pickintr(void *core, bus_space_tag_t iot, bus_space_tag_t memt,
pci_chipset_tag_t pc)
{
another_mystery_icu_iot = iot;
if (bus_space_map(iot, 0x536, 2, 0, &another_mystery_icu_ioh))
panic("pci_1000_pickintr");
pc->pc_intr_v = core;
pc->pc_intr_map = dec_1000_intr_map;
pc->pc_intr_string = alpha_pci_generic_intr_string;
pc->pc_intr_evcnt = alpha_pci_generic_intr_evcnt;
pc->pc_intr_establish = alpha_pci_generic_intr_establish;
pc->pc_intr_disestablish = alpha_pci_generic_intr_disestablish;
pc->pc_pciide_compat_intr_establish = NULL;
pc->pc_intr_desc = "dec 1000";
pc->pc_vecbase = 0x900;
pc->pc_nirq = PCI_NIRQ;
pc->pc_intr_enable = dec_1000_enable_intr;
pc->pc_intr_disable = dec_1000_disable_intr;
pci_1000_imi();
alpha_pci_intr_alloc(pc, PCI_STRAY_MAX);
#if NSIO > 0 || NPCEB > 0
sio_intr_setup(pc, iot);
#endif
}
ALPHA_PCI_INTR_INIT(ST_DEC_1000, pci_1000_pickintr)
static int
dec_1000_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 = 0; /* XXX gcc */
if (buspin == 0) /* No IRQ used. */
return 1;
if (!(1 <= buspin && buspin <= 4))
goto bad;
pci_decompose_tag(pc, bustag, NULL, &device, NULL);
switch(device) {
case 6:
if(buspin != 1)
break;
/* integrated ncr scsi */
alpha_pci_intr_handle_init(ihp, 0xc, 0);
return 0;
case 11:
case 12:
case 13:
alpha_pci_intr_handle_init(ihp,
(device - 11) * 4 + buspin - 1, 0);
return 0;
}
bad: printf("dec_1000_intr_map: can't map dev %d pin %d\n", device, buspin);
return 1;
}
/*
* Read and write the mystery ICU IMR registers
*/
#define IR() bus_space_read_2(another_mystery_icu_iot, \
another_mystery_icu_ioh, 0)
#define IW(v) bus_space_write_2(another_mystery_icu_iot, \
another_mystery_icu_ioh, 0, (v))
/*
* Enable and disable interrupts at the ICU level
*/
static void
dec_1000_enable_intr(pci_chipset_tag_t pc __unused, int irq)
{
IW(IR() | 1 << irq);
}
static void
dec_1000_disable_intr(pci_chipset_tag_t pc __unused, int irq)
{
IW(IR() & ~(1 << irq));
}
/*
* Initialize mystery ICU
*/
static void
pci_1000_imi(void)
{
IW(0); /* XXX ?? */
}
