/* $NetBSD: pci_eb64plus.c,v 1.24 2014/03/21 16:39:29 christos Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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_eb64plus.c,v 1.24 2014/03/21 16:39:29 christos 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 <machine/autoconf.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/apecsreg.h>
#include <alpha/pci/apecsvar.h>
#include <alpha/pci/pci_eb64plus.h>
#include "sio.h"
#if NSIO
#include <alpha/pci/siovar.h>
#endif
int dec_eb64plus_intr_map(const struct pci_attach_args *,
pci_intr_handle_t *);
const char *dec_eb64plus_intr_string(void *, pci_intr_handle_t, char *, size_t);
const struct evcnt *dec_eb64plus_intr_evcnt(void *, pci_intr_handle_t);
void *dec_eb64plus_intr_establish(void *, pci_intr_handle_t,
int, int (*func)(void *), void *);
void dec_eb64plus_intr_disestablish(void *, void *);
#define EB64PLUS_MAX_IRQ 32
#define PCI_STRAY_MAX 5
struct alpha_shared_intr *eb64plus_pci_intr;
bus_space_tag_t eb64plus_intrgate_iot;
bus_space_handle_t eb64plus_intrgate_ioh;
void eb64plus_iointr(void *arg, unsigned long vec);
extern void eb64plus_intr_enable(int irq); /* pci_eb64plus_intr.S */
extern void eb64plus_intr_disable(int irq); /* pci_eb64plus_intr.S */
void
pci_eb64plus_pickintr(struct apecs_config *acp)
{
bus_space_tag_t iot = &acp->ac_iot;
pci_chipset_tag_t pc = &acp->ac_pc;
char *cp;
int i;
pc->pc_intr_v = acp;
pc->pc_intr_map = dec_eb64plus_intr_map;
pc->pc_intr_string = dec_eb64plus_intr_string;
pc->pc_intr_evcnt = dec_eb64plus_intr_evcnt;
pc->pc_intr_establish = dec_eb64plus_intr_establish;
pc->pc_intr_disestablish = dec_eb64plus_intr_disestablish;
/* Not supported on the EB64+. */
pc->pc_pciide_compat_intr_establish = NULL;
eb64plus_intrgate_iot = iot;
if (bus_space_map(eb64plus_intrgate_iot, 0x804, 3, 0,
&eb64plus_intrgate_ioh) != 0)
panic("pci_eb64plus_pickintr: couldn't map interrupt PLD");
for (i = 0; i < EB64PLUS_MAX_IRQ; i++)
eb64plus_intr_disable(i);
#define PCI_EB64PLUS_IRQ_STR 8
eb64plus_pci_intr = alpha_shared_intr_alloc(EB64PLUS_MAX_IRQ,
PCI_EB64PLUS_IRQ_STR);
for (i = 0; i < EB64PLUS_MAX_IRQ; i++) {
alpha_shared_intr_set_maxstrays(eb64plus_pci_intr, i,
PCI_STRAY_MAX);
cp = alpha_shared_intr_string(eb64plus_pci_intr, i);
snprintf(cp, PCI_EB64PLUS_IRQ_STR, "irq %d", i);
evcnt_attach_dynamic(alpha_shared_intr_evcnt(
eb64plus_pci_intr, i), EVCNT_TYPE_INTR, NULL,
"eb64+", cp);
}
#if NSIO
sio_intr_setup(pc, iot);
#endif
}
int
dec_eb64plus_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
pcitag_t bustag = pa->pa_intrtag;
int buspin = pa->pa_intrpin, line = pa->pa_intrline;
pci_chipset_tag_t pc = pa->pa_pc;
int bus, device, function;
if (buspin == 0) {
/* No IRQ used. */
return 1;
}
if (buspin > 4) {
printf("dec_eb64plus_intr_map: bad interrupt pin %d\n", buspin);
return 1;
}
pci_decompose_tag(pc, bustag, &bus, &device, &function);
/*
* The console places the interrupt mapping in the "line" value.
* A value of (char)-1 indicates there is no mapping.
*/
if (line == 0xff) {
printf("dec_eb64plus_intr_map: no mapping for %d/%d/%d\n",
bus, device, function);
return (1);
}
if (line >= EB64PLUS_MAX_IRQ)
panic("dec_eb64plus_intr_map: eb64+ irq too large (%d)",
line);
*ihp = line;
return (0);
}
const char *
dec_eb64plus_intr_string(void *acv, pci_intr_handle_t ih, char *buf, size_t len)
{
if (ih > EB64PLUS_MAX_IRQ)
panic("%s: bogus eb64+ IRQ 0x%lx", __func__, ih);
snprintf(buf, len, "eb64+ irq %ld", ih);
return buf;
}
const struct evcnt *
dec_eb64plus_intr_evcnt(void *acv, pci_intr_handle_t ih)
{
if (ih > EB64PLUS_MAX_IRQ)
panic("%s: bogus eb64+ IRQ 0x%lx", __func__, ih);
return (alpha_shared_intr_evcnt(eb64plus_pci_intr, ih));
}
void *
dec_eb64plus_intr_establish(void *acv, pci_intr_handle_t ih, int level, int (*func)(void *), void *arg)
{
void *cookie;
if (ih > EB64PLUS_MAX_IRQ)
panic("dec_eb64plus_intr_establish: bogus eb64+ IRQ 0x%lx",
ih);
cookie = alpha_shared_intr_establish(eb64plus_pci_intr, ih, IST_LEVEL,
level, func, arg, "eb64+ irq");
if (cookie != NULL &&
alpha_shared_intr_firstactive(eb64plus_pci_intr, ih)) {
scb_set(0x900 + SCB_IDXTOVEC(ih), eb64plus_iointr, NULL,
level);
eb64plus_intr_enable(ih);
}
return (cookie);
}
void
dec_eb64plus_intr_disestablish(void *acv, void *cookie)
{
struct alpha_shared_intrhand *ih = cookie;
unsigned int irq = ih->ih_num;
int s;
s = splhigh();
alpha_shared_intr_disestablish(eb64plus_pci_intr, cookie,
"eb64+ irq");
if (alpha_shared_intr_isactive(eb64plus_pci_intr, irq) == 0) {
eb64plus_intr_disable(irq);
alpha_shared_intr_set_dfltsharetype(eb64plus_pci_intr, irq,
IST_NONE);
scb_free(0x900 + SCB_IDXTOVEC(irq));
}
splx(s);
}
void
eb64plus_iointr(void *arg, unsigned long vec)
{
int irq;
irq = SCB_VECTOIDX(vec - 0x900);
if (!alpha_shared_intr_dispatch(eb64plus_pci_intr, irq)) {
alpha_shared_intr_stray(eb64plus_pci_intr, irq,
"eb64+ irq");
if (ALPHA_SHARED_INTR_DISABLE(eb64plus_pci_intr, irq))
eb64plus_intr_disable(irq);
} else
alpha_shared_intr_reset_strays(eb64plus_pci_intr, irq);
}
#if 0 /* THIS DOES NOT WORK! see pci_eb64plus_intr.S. */
uint8_t eb64plus_intr_mask[3] = { 0xff, 0xff, 0xff };
void
eb64plus_intr_enable(int irq)
{
int byte = (irq / 8), bit = (irq % 8);
#if 1
printf("eb64plus_intr_enable: enabling %d (%d:%d)\n", irq, byte, bit);
#endif
eb64plus_intr_mask[byte] &= ~(1 << bit);
bus_space_write_1(eb64plus_intrgate_iot, eb64plus_intrgate_ioh, byte,
eb64plus_intr_mask[byte]);
}
void
eb64plus_intr_disable(int irq)
{
int byte = (irq / 8), bit = (irq % 8);
#if 1
printf("eb64plus_intr_disable: disabling %d (%d:%d)\n", irq, byte, bit);
#endif
eb64plus_intr_mask[byte] |= (1 << bit);
bus_space_write_1(eb64plus_intrgate_iot, eb64plus_intrgate_ioh, byte,
eb64plus_intr_mask[byte]);
}
#endif