NetBSD-5.0.2/sys/arch/alpha/pci/pci_1000.c
/* $NetBSD: pci_1000.c,v 1.18 2008/04/28 20:23:11 martin 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 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/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: pci_1000.c,v 1.18 2008/04/28 20:23:11 martin 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 <uvm/uvm_extern.h>
#include <machine/autoconf.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/pci_1000.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;
int dec_1000_intr_map __P((struct pci_attach_args *, pci_intr_handle_t *));
const char *dec_1000_intr_string __P((void *, pci_intr_handle_t));
const struct evcnt *dec_1000_intr_evcnt __P((void *, pci_intr_handle_t));
void *dec_1000_intr_establish __P((void *, pci_intr_handle_t,
int, int (*func)(void *), void *));
void dec_1000_intr_disestablish __P((void *, void *));
#define PCI_NIRQ 16
#define PCI_STRAY_MAX 5
struct alpha_shared_intr *dec_1000_pci_intr;
static void dec_1000_iointr __P((void *arg, unsigned long vec));
static void dec_1000_enable_intr __P((int irq));
static void dec_1000_disable_intr __P((int irq));
static void pci_1000_imi __P((void));
static pci_chipset_tag_t pc_tag;
void
pci_1000_pickintr(core, iot, memt, pc)
void *core;
bus_space_tag_t iot, memt;
pci_chipset_tag_t pc;
{
char *cp;
int i;
another_mystery_icu_iot = iot;
pc_tag = pc;
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 = dec_1000_intr_string;
pc->pc_intr_evcnt = dec_1000_intr_evcnt;
pc->pc_intr_establish = dec_1000_intr_establish;
pc->pc_intr_disestablish = dec_1000_intr_disestablish;
pc->pc_pciide_compat_intr_establish = NULL;
dec_1000_pci_intr =
alpha_shared_intr_alloc(PCI_NIRQ, 8);
for (i = 0; i < PCI_NIRQ; i++) {
alpha_shared_intr_set_maxstrays(dec_1000_pci_intr, i,
PCI_STRAY_MAX);
cp = alpha_shared_intr_string(dec_1000_pci_intr, i);
sprintf(cp, "irq %d", i);
evcnt_attach_dynamic(alpha_shared_intr_evcnt(
dec_1000_pci_intr, i), EVCNT_TYPE_INTR, NULL,
"dec_1000", cp);
}
pci_1000_imi();
#if NSIO > 0 || NPCEB > 0
sio_intr_setup(pc, iot);
#endif
}
int
dec_1000_intr_map(pa, ihp)
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;
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;
*ihp = 0xc; /* integrated ncr scsi */
return 0;
case 11:
case 12:
case 13:
*ihp = (device - 11) * 4 + buspin - 1;
return 0;
}
bad: printf("dec_1000_intr_map: can't map dev %d pin %d\n", device, buspin);
return 1;
}
const char *
dec_1000_intr_string(ccv, ih)
void *ccv;
pci_intr_handle_t ih;
{
static const char irqmsg_fmt[] = "dec_1000 irq %ld";
static char irqstr[sizeof irqmsg_fmt];
if (ih >= PCI_NIRQ)
panic("dec_1000_intr_string: bogus dec_1000 IRQ 0x%lx", ih);
snprintf(irqstr, sizeof irqstr, irqmsg_fmt, ih);
return (irqstr);
}
const struct evcnt *
dec_1000_intr_evcnt(ccv, ih)
void *ccv;
pci_intr_handle_t ih;
{
if (ih >= PCI_NIRQ)
panic("dec_1000_intr_evcnt: bogus dec_1000 IRQ 0x%lx", ih);
return (alpha_shared_intr_evcnt(dec_1000_pci_intr, ih));
}
void *
dec_1000_intr_establish(ccv, ih, level, func, arg)
void *ccv, *arg;
pci_intr_handle_t ih;
int level;
int (*func) __P((void *));
{
void *cookie;
if (ih >= PCI_NIRQ)
panic("dec_1000_intr_establish: IRQ too high, 0x%lx", ih);
cookie = alpha_shared_intr_establish(dec_1000_pci_intr, ih, IST_LEVEL,
level, func, arg, "dec_1000 irq");
if (cookie != NULL &&
alpha_shared_intr_firstactive(dec_1000_pci_intr, ih)) {
scb_set(0x900 + SCB_IDXTOVEC(ih), dec_1000_iointr, NULL,
level);
dec_1000_enable_intr(ih);
}
return (cookie);
}
void
dec_1000_intr_disestablish(ccv, cookie)
void *ccv, *cookie;
{
struct alpha_shared_intrhand *ih = cookie;
unsigned int irq = ih->ih_num;
int s;
s = splhigh();
alpha_shared_intr_disestablish(dec_1000_pci_intr, cookie,
"dec_1000 irq");
if (alpha_shared_intr_isactive(dec_1000_pci_intr, irq) == 0) {
dec_1000_disable_intr(irq);
alpha_shared_intr_set_dfltsharetype(dec_1000_pci_intr, irq,
IST_NONE);
scb_free(0x900 + SCB_IDXTOVEC(irq));
}
splx(s);
}
static void
dec_1000_iointr(arg, vec)
void *arg;
unsigned long vec;
{
int irq;
irq = SCB_VECTOIDX(vec - 0x900);
if (!alpha_shared_intr_dispatch(dec_1000_pci_intr, irq)) {
alpha_shared_intr_stray(dec_1000_pci_intr, irq,
"dec_1000 irq");
if (ALPHA_SHARED_INTR_DISABLE(dec_1000_pci_intr, irq))
dec_1000_disable_intr(irq);
} else
alpha_shared_intr_reset_strays(dec_1000_pci_intr, irq);
}
/*
* 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(irq)
int irq;
{
IW(IR() | 1 << irq);
}
static void
dec_1000_disable_intr(irq)
int irq;
{
IW(IR() & ~(1 << irq));
}
/*
* Initialize mystery ICU
*/
static void
pci_1000_imi()
{
IW(0); /* XXX ?? */
}