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

364 lines
8.9 KiB
C

/* $NetBSD: pci_kn300.c,v 1.7 1998/05/05 22:01:31 mjacob 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 1.7 1998/05/05 22:01:31 mjacob 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 <vm/vm.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>
#ifndef EVCNT_COUNTERS
#include <machine/intrcnt.h>
#endif
#include "sio.h"
#if NSIO
#include <alpha/pci/siovar.h>
#endif
int
dec_kn300_intr_map __P((void *, pcitag_t, int, int, pci_intr_handle_t *));
const char *dec_kn300_intr_string __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 NVEC (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN)
static char savunit[NVEC];
static char savirqs[NVEC];
extern struct mcpcia_softc *mcpcias;
struct mcpcia_config *mcpcia_eisaccp = NULL;
static struct alpha_shared_intr *kn300_pci_intr;
#ifdef EVCNT_COUNTERS
struct evcnt kn300_intr_evcnt;
#endif
static char * kn300_spurious __P((int));
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;
{
pci_chipset_tag_t pc = &ccp->cc_pc;
if (first) {
int g;
kn300_pci_intr = alpha_shared_intr_alloc(NVEC);
for (g = 0; g < NVEC; g++) {
alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25);
savunit[g] = (char) -1;
savirqs[g] = (char) -1;
}
set_iointr(kn300_iointr);
}
pc->pc_intr_v = ccp;
pc->pc_intr_map = dec_kn300_intr_map;
pc->pc_intr_string = dec_kn300_intr_string;
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 NSIO
if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) {
extern void dec_kn300_cons_init __P((void));
bus_space_tag_t iot = &ccp->cc_iot;
if (mcpcia_eisaccp) {
printf("Huh? There's only supposed to be one eisa!\n");
}
sio_intr_setup(pc, iot);
kn300_enable_intr(ccp, KN300_PCEB_IRQ);
mcpcia_eisaccp = ccp;
dec_kn300_cons_init(); /* XXXXXXXXXXXXXXXXXXX */
}
#else
#error "It will be impossible for you to have a console"
#endif
}
int
dec_kn300_intr_map(ccv, bustag, buspin, line, ihp)
void *ccv;
pcitag_t bustag;
int buspin, line;
pci_intr_handle_t *ihp;
{
struct mcpcia_config *ccp = ccv;
pci_chipset_tag_t pc = &ccp->cc_pc;
int device;
int kn300_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);
if (device == 1) {
/*
* This can only be the NCR810 SCSI.
* XXX: Do we need to check this more closely?
*/
if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) {
printf("XXXXX: How can you have an EISA in the spot "
"as an NCR 810?\n");
}
kn300_irq = 16;
} else if (device >= 2 && device <= 5) {
kn300_irq = (device - 2) * 4;
} else {
printf("dec_kn300_intr_map: weird device number %d\n", device);
return(1);
}
/*
* handle layout:
*
* 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
* bits 11-15 IRQ
*/
*ihp = (pci_intr_handle_t)
(buspin - 1 ) |
((device & 0x7) << 2) |
((ccp->cc_sc->mcpcia_mid - 4) << 5) |
((7 - ccp->cc_sc->mcpcia_gid) << 8) |
(kn300_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 %d PCI Interrupt Pin %c",
(ih >> 11) & 0x1f, (ih & 0x3) + 'A');
return (irqstr);
}
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;
{
void *cookie;
int v;
v = ih & 0x3ff;
cookie = alpha_shared_intr_establish(kn300_pci_intr, v, IST_LEVEL,
level, func, arg, "kn300 vector");
if (cookie != NULL && alpha_shared_intr_isactive(kn300_pci_intr, v)) {
struct mcpcia_config *ccp = ccv;
savunit[v] = ccp->cc_sc->mcpcia_dev.dv_unit;
savirqs[v] = (ih >> 11) & 0x1f;
kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f));
alpha_mb();
}
return (cookie);
}
void
dec_kn300_intr_disestablish(ccv, cookie)
void *ccv, *cookie;
{
panic("dec_kn300_intr_disestablish not implemented");
}
static char *
kn300_spurious(ih)
int ih;
{
static char str[48];
int pidx, slot, midx, gidx;
pidx = ih & 0x3;
slot = (ih >> 2) & 0x7;
midx = (ih >> 5) & 0x7;
gidx = (ih >> 8) & 0x7;
sprintf(str, "mcbus%d mid %d PCI Slot %d PCI Interrupt Pin %c irq",
gidx, midx + 4, slot, pidx + 'A');
return (str);
}
void
kn300_iointr(framep, vec)
void *framep;
unsigned long vec;
{
struct mcpcia_softc *mcp;
int v, gidx, midx;
if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) {
#if NSIO
sio_iointr(framep, vec);
return;
#else
printf("kn300_iointr: (E)ISA interrupt support not configured"
" for vector 0x%x", vec);
kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ);
#endif
}
v = (int) vec - MCPCIA_VEC_PCI;
midx = v / 0x200;
gidx = midx / 4;
midx = midx % 4;
#ifdef EVCNT_COUNTERS
kn300_intr_evcnt.ev_count++;
#endif
/*
* Check for i2c bus interrupts XXXXXXXXX
*/
if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_CVEC) {
#ifndef EVCNT_COUNTERS
intrcnt[INTRCNT_KN300_I2C_CTRL]++;
#endif
printf("i2c: controller interrupt\n");
return;
}
if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_BVEC) {
#ifndef EVCNT_COUNTERS
intrcnt[INTRCNT_KN300_I2C_BUS]++;
#endif
printf("i2c: bus interrupt\n");
return;
}
/*
* Convert vector offset into a dense number.
*/
v /= 0x10;
#ifndef EVCNT_COUNTERS
if (savirqs[v] >= 0 && savirqs[v] <= INTRCNT_KN300_NCR810) {
intrcnt[INTRCNT_KN300_IRQ + savirqs[v]]++;
}
#endif
if (alpha_shared_intr_dispatch(kn300_pci_intr, v)) {
return;
}
/*
* Nobody fielded the interrupt?
*/
alpha_shared_intr_stray(kn300_pci_intr, savirqs[v], kn300_spurious(v));
if (kn300_pci_intr[v].intr_nstrays <
kn300_pci_intr[v].intr_maxstrays) {
return;
}
/*
* Search for the controlling mcpcia.
*/
for (mcp = mcpcias; mcp != NULL; mcp = mcp->mcpcia_next) {
if (mcp->mcpcia_dev.dv_unit == savunit[v]) {
break;
}
}
/*
* And if found, disable this IRQ level. Guess what?
* This may kill other things too.
*/
if (mcp) {
kn300_disable_intr(&mcp->mcpcia_cc, savirqs[v]);
}
}
void
kn300_enable_intr(ccp, irq)
struct mcpcia_config *ccp;
int irq;
{
alpha_mb();
REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) |= (1 << irq);
alpha_mb();
}
void
kn300_disable_intr(ccp, irq)
struct mcpcia_config *ccp;
int irq;
{
alpha_mb();
REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) &= ~(1 << irq);
alpha_mb();
}