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NetBSD/sys/arch/alpha/pci/pci_kn300.c

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/* $NetBSD: pci_kn300.c,v 1.23 2001/07/27 00:25:20 thorpej Exp $ */
/*
* Copyright (c) 1998 by Matthew Jacob
* NASA AMES Research Center.
* All rights reserved.
*
* 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 immediately at the beginning of the file, without modification,
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: pci_kn300.c,v 1.23 2001/07/27 00:25:20 thorpej 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/mcbus/mcbusvar.h>
#include <alpha/mcbus/mcbusreg.h>
#include <alpha/pci/mcpciareg.h>
#include <alpha/pci/mcpciavar.h>
#include <alpha/pci/pci_kn300.h>
#include "sio.h"
#if NSIO > 0 || NPCEB > 0
#include <alpha/pci/siovar.h>
#endif
int dec_kn300_intr_map __P((struct pci_attach_args *,
pci_intr_handle_t *));
const char *dec_kn300_intr_string __P((void *, pci_intr_handle_t));
const struct evcnt *dec_kn300_intr_evcnt __P((void *, pci_intr_handle_t));
void *dec_kn300_intr_establish __P((void *, pci_intr_handle_t,
int, int (*func)(void *), void *));
void dec_kn300_intr_disestablish __P((void *, void *));
#define KN300_PCEB_IRQ 16
#define NPIN 4
#define NIRQ (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN)
static int savirqs[NIRQ];
static struct alpha_shared_intr *kn300_pci_intr;
static struct mcpcia_config *mcpcia_eisaccp = NULL;
void kn300_iointr __P((void *, unsigned long));
void kn300_enable_intr __P((struct mcpcia_config *, int));
void kn300_disable_intr __P((struct mcpcia_config *, int));
void
pci_kn300_pickintr(ccp, first)
struct mcpcia_config *ccp;
int first;
{
char *cp;
pci_chipset_tag_t pc = &ccp->cc_pc;
if (first) {
int g;
kn300_pci_intr = alpha_shared_intr_alloc(NIRQ, 16);
for (g = 0; g < NIRQ; g++) {
alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25);
cp = alpha_shared_intr_string(kn300_pci_intr, g);
sprintf(cp, "irq %d", g);
evcnt_attach_dynamic(alpha_shared_intr_evcnt(
kn300_pci_intr, g), EVCNT_TYPE_INTR, NULL,
"kn300", cp);
savirqs[g] = (char) -1;
}
}
pc->pc_intr_v = ccp;
pc->pc_intr_map = dec_kn300_intr_map;
pc->pc_intr_string = dec_kn300_intr_string;
pc->pc_intr_evcnt = dec_kn300_intr_evcnt;
pc->pc_intr_establish = dec_kn300_intr_establish;
pc->pc_intr_disestablish = dec_kn300_intr_disestablish;
/* Not supported on KN300. */
pc->pc_pciide_compat_intr_establish = NULL;
if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) {
mcpcia_eisaccp = ccp;
#if NSIO > 0 || NPCEB > 0
sio_intr_setup(pc, &ccp->cc_iot);
kn300_enable_intr(ccp, KN300_PCEB_IRQ);
#endif
}
}
int
dec_kn300_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;
struct mcpcia_config *ccp = (struct mcpcia_config *)pc->pc_intr_v;
int device;
int mcpcia_irq;
if (buspin == 0) {
/* No IRQ used. */
return 1;
}
if (buspin > 4 || buspin < 0) {
printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin);
return 1;
}
alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL);
/*
* On MID 5 device 1 is the internal NCR 53c810.
*/
if (ccp->cc_mid == 5 && device == 1) {
mcpcia_irq = 16;
} else if (device >= 2 && device <= 5) {
mcpcia_irq = (device - 2) * 4;
} else {
printf("dec_kn300_intr_map: weird device number %d\n", device);
return(1);
}
/*
* handle layout:
*
* Determine kn300 IRQ (encoded in SCB vector):
* bits 0..1 buspin-1
* bits 2..4 PCI Slot (0..7- yes, some don't exist)
* bits 5..7 MID-4
* bits 8..10 7-GID
*
* Software only:
* bits 11-15 MCPCIA IRQ
*/
*ihp = (pci_intr_handle_t)
(buspin - 1 ) |
((device & 0x7) << 2) |
((ccp->cc_mid - 4) << 5) |
((7 - ccp->cc_gid) << 8) |
(mcpcia_irq << 11);
return (0);
}
const char *
dec_kn300_intr_string(ccv, ih)
void *ccv;
pci_intr_handle_t ih;
{
static char irqstr[64];
sprintf(irqstr, "kn300 irq %ld", ih & 0x3ff);
return (irqstr);
}
const struct evcnt *
dec_kn300_intr_evcnt(ccv, ih)
void *ccv;
pci_intr_handle_t ih;
{
return (alpha_shared_intr_evcnt(kn300_pci_intr, ih & 0x3ff));
}
void *
dec_kn300_intr_establish(ccv, ih, level, func, arg)
void *ccv;
pci_intr_handle_t ih;
int level;
int (*func) __P((void *));
void *arg;
{
struct mcpcia_config *ccp = ccv;
void *cookie;
int irq;
irq = ih & 0x3ff;
cookie = alpha_shared_intr_establish(kn300_pci_intr, irq, IST_LEVEL,
level, func, arg, "kn300 irq");
if (cookie != NULL &&
alpha_shared_intr_firstactive(kn300_pci_intr, irq)) {
scb_set(MCPCIA_VEC_PCI + SCB_IDXTOVEC(irq),
kn300_iointr, NULL);
alpha_shared_intr_set_private(kn300_pci_intr, irq, ccp);
savirqs[irq] = (ih >> 11) & 0x1f;
kn300_enable_intr(ccp, savirqs[irq]);
alpha_mb();
}
return (cookie);
}
void
dec_kn300_intr_disestablish(ccv, cookie)
void *ccv, *cookie;
{
panic("dec_kn300_intr_disestablish not implemented");
}
void
kn300_iointr(arg, vec)
void *arg;
unsigned long vec;
{
struct mcpcia_softc *mcp;
u_long irq;
irq = SCB_VECTOIDX(vec - MCPCIA_VEC_PCI);
if (alpha_shared_intr_dispatch(kn300_pci_intr, irq)) {
/*
* Any claim of an interrupt at this level is a hint to
* reset the stray interrupt count- elsewise a slow leak
* over time will cause this level to be shutdown.
*/
alpha_shared_intr_set_maxstrays(kn300_pci_intr, irq, 25);
return;
}
/*
* If we haven't finished configuring yet, or there is no mcp
* registered for this level yet, just return.
*/
mcp = alpha_shared_intr_get_private(kn300_pci_intr, irq);
if (mcp == NULL || mcp->mcpcia_cc == NULL)
return;
/*
* We're getting an interrupt for a device we haven't enabled.
* We had better not try and use -1 to find the right bit to disable.
*/
if (savirqs[irq] == -1) {
printf("kn300_iointr: stray interrupt vector 0x%lx\n", vec);
return;
}
/*
* Stray interrupt; disable the IRQ on the appropriate MCPCIA
* if we've reached the limit.
*/
alpha_shared_intr_stray(kn300_pci_intr, irq, "kn300 irq");
if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, irq) == 0)
return;
kn300_disable_intr(mcp->mcpcia_cc, savirqs[irq]);
}
void
kn300_enable_intr(ccp, irq)
struct mcpcia_config *ccp;
int irq;
{
alpha_mb();
REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq);
alpha_mb();
}
void
kn300_disable_intr(ccp, irq)
struct mcpcia_config *ccp;
int irq;
{
alpha_mb();
REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq);
alpha_mb();
}
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