NetBSD/sys/arch/alpha/pci/pci_6600.c

358 lines
9.3 KiB
C

/* $NetBSD: pci_6600.c,v 1.10 2002/09/27 15:35:38 provos Exp $ */
/*-
* Copyright (c) 1999 by Ross Harvey. 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, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ross Harvey.
* 4. The name of Ross Harvey may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
* ARE DISCLAIMED. IN NO EVENT SHALL ROSS HARVEY 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>
__KERNEL_RCSID(0, "$NetBSD: pci_6600.c,v 1.10 2002/09/27 15:35:38 provos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <machine/autoconf.h>
#define _ALPHA_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/rpb.h>
#include <machine/alpha.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pciidereg.h>
#include <dev/pci/pciidevar.h>
#include <alpha/pci/tsreg.h>
#include <alpha/pci/tsvar.h>
#include <alpha/pci/pci_6600.h>
#define pci_6600() { Generate ctags(1) key. }
#include "sio.h"
#if NSIO
#include <alpha/pci/siovar.h>
#endif
#define PCI_NIRQ 64
#define PCI_STRAY_MAX 5
/*
* Some Tsunami models have a PCI device (the USB controller) with interrupts
* tied to ISA IRQ lines. The IRQ is encoded as:
*
* line = 0xe0 | isa_irq;
*/
#define DEC_6600_LINE_IS_ISA(line) ((line) >= 0xe0 && (line) <= 0xef)
#define DEC_6600_LINE_ISA_IRQ(line) ((line) & 0x0f)
static char *irqtype = "6600 irq";
static struct tsp_config *sioprimary;
void dec_6600_intr_disestablish __P((void *, void *));
void *dec_6600_intr_establish __P((
void *, pci_intr_handle_t, int, int (*func)(void *), void *));
const char *dec_6600_intr_string __P((void *, pci_intr_handle_t));
const struct evcnt *dec_6600_intr_evcnt __P((void *, pci_intr_handle_t));
int dec_6600_intr_map __P((struct pci_attach_args *, pci_intr_handle_t *));
void *dec_6600_pciide_compat_intr_establish __P((void *, struct device *,
struct pci_attach_args *, int, int (*)(void *), void *));
struct alpha_shared_intr *dec_6600_pci_intr;
void dec_6600_iointr __P((void *arg, unsigned long vec));
extern void dec_6600_intr_enable __P((int irq));
extern void dec_6600_intr_disable __P((int irq));
void
pci_6600_pickintr(pcp)
struct tsp_config *pcp;
{
bus_space_tag_t iot = &pcp->pc_iot;
pci_chipset_tag_t pc = &pcp->pc_pc;
char *cp;
int i;
pc->pc_intr_v = pcp;
pc->pc_intr_map = dec_6600_intr_map;
pc->pc_intr_string = dec_6600_intr_string;
pc->pc_intr_evcnt = dec_6600_intr_evcnt;
pc->pc_intr_establish = dec_6600_intr_establish;
pc->pc_intr_disestablish = dec_6600_intr_disestablish;
pc->pc_pciide_compat_intr_establish = NULL;
/*
* System-wide and Pchip-0-only logic...
*/
if (dec_6600_pci_intr == NULL) {
sioprimary = pcp;
pc->pc_pciide_compat_intr_establish =
dec_6600_pciide_compat_intr_establish;
dec_6600_pci_intr = alpha_shared_intr_alloc(PCI_NIRQ, 8);
for (i = 0; i < PCI_NIRQ; i++) {
alpha_shared_intr_set_maxstrays(dec_6600_pci_intr, i,
PCI_STRAY_MAX);
alpha_shared_intr_set_private(dec_6600_pci_intr, i,
sioprimary);
cp = alpha_shared_intr_string(dec_6600_pci_intr, i);
sprintf(cp, "irq %d", i);
evcnt_attach_dynamic(alpha_shared_intr_evcnt(
dec_6600_pci_intr, 1), EVCNT_TYPE_INTR, NULL,
"dec_6600", cp);
}
#if NSIO
sio_intr_setup(pc, iot);
dec_6600_intr_enable(55); /* irq line for sio */
#endif
}
}
int
dec_6600_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, 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("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_6600_intr_map: no mapping for %d/%d/%d\n",
bus, device, function);
return (1);
}
#if NSIO == 0
if (DEC_6600_LINE_IS_ISA(line)) {
printf("dec_6600_intr_map: ISA IRQ %d for %d/%d/%d\n",
DEC_6600_LINE_ISA_IRQ(line), bus, device, function);
return (1);
}
#endif
if (DEC_6600_LINE_IS_ISA(line) == 0 && line >= PCI_NIRQ)
panic("dec_6600_intr_map: dec 6600 irq too large (%d)",
line);
*ihp = line;
return (0);
}
const char *
dec_6600_intr_string(acv, ih)
void *acv;
pci_intr_handle_t ih;
{
static const char irqfmt[] = "dec 6600 irq %ld";
static char irqstr[sizeof irqfmt];
#if NSIO
if (DEC_6600_LINE_IS_ISA(ih))
return (sio_intr_string(NULL /*XXX*/,
DEC_6600_LINE_ISA_IRQ(ih)));
#endif
snprintf(irqstr, sizeof irqstr, irqfmt, ih);
return (irqstr);
}
const struct evcnt *
dec_6600_intr_evcnt(acv, ih)
void *acv;
pci_intr_handle_t ih;
{
#if NSIO
if (DEC_6600_LINE_IS_ISA(ih))
return (sio_intr_evcnt(NULL /*XXX*/,
DEC_6600_LINE_ISA_IRQ(ih)));
#endif
return (alpha_shared_intr_evcnt(dec_6600_pci_intr, ih));
}
void *
dec_6600_intr_establish(acv, ih, level, func, arg)
void *acv, *arg;
pci_intr_handle_t ih;
int level;
int (*func) __P((void *));
{
void *cookie;
#if NSIO
if (DEC_6600_LINE_IS_ISA(ih))
return (sio_intr_establish(NULL /*XXX*/,
DEC_6600_LINE_ISA_IRQ(ih), IST_LEVEL, level, func, arg));
#endif
if (ih >= PCI_NIRQ)
panic("dec_6600_intr_establish: bogus dec 6600 IRQ 0x%lx",
ih);
cookie = alpha_shared_intr_establish(dec_6600_pci_intr, ih, IST_LEVEL,
level, func, arg, irqtype);
if (cookie != NULL &&
alpha_shared_intr_firstactive(dec_6600_pci_intr, ih)) {
scb_set(0x900 + SCB_IDXTOVEC(ih), dec_6600_iointr, NULL);
dec_6600_intr_enable(ih);
}
return (cookie);
}
void
dec_6600_intr_disestablish(acv, cookie)
void *acv, *cookie;
{
struct alpha_shared_intrhand *ih = cookie;
unsigned int irq = ih->ih_num;
int s;
#if NSIO
/*
* We have to determine if this is an ISA IRQ or not! We do this
* by checking to see if the intrhand points back to an intrhead
* that points to the sioprimary TSP. If not, it's an ISA IRQ.
* Pretty disgusting, eh?
*/
if (ih->ih_intrhead->intr_private != sioprimary) {
sio_intr_disestablish(NULL /*XXX*/, cookie);
return;
}
#endif
s = splhigh();
alpha_shared_intr_disestablish(dec_6600_pci_intr, cookie, irqtype);
if (alpha_shared_intr_isactive(dec_6600_pci_intr, irq) == 0) {
dec_6600_intr_disable(irq);
alpha_shared_intr_set_dfltsharetype(dec_6600_pci_intr, irq,
IST_NONE);
scb_free(0x900 + SCB_IDXTOVEC(irq));
}
splx(s);
}
void
dec_6600_iointr(arg, vec)
void *arg;
unsigned long vec;
{
int irq;
irq = SCB_VECTOIDX(vec - 0x900);
if (irq >= PCI_NIRQ)
panic("iointr: irq %d is too high", irq);
if (!alpha_shared_intr_dispatch(dec_6600_pci_intr, irq)) {
alpha_shared_intr_stray(dec_6600_pci_intr, irq,
irqtype);
if (ALPHA_SHARED_INTR_DISABLE(dec_6600_pci_intr, irq))
dec_6600_intr_disable(irq);
}
}
void
dec_6600_intr_enable(irq)
int irq;
{
alpha_mb();
STQP(TS_C_DIM0) |= 1UL << irq;
alpha_mb();
}
void
dec_6600_intr_disable(irq)
int irq;
{
alpha_mb();
STQP(TS_C_DIM0) &= ~(1UL << irq);
alpha_mb();
}
void *
dec_6600_pciide_compat_intr_establish(v, dev, pa, chan, func, arg)
void *v;
struct device *dev;
struct pci_attach_args *pa;
int chan;
int (*func) __P((void *));
void *arg;
{
pci_chipset_tag_t pc = pa->pa_pc;
void *cookie = NULL;
int bus, irq;
pci_decompose_tag(pc, pa->pa_tag, &bus, NULL, NULL);
/*
* If this isn't PCI bus #0 on the TSP that holds the PCI-ISA
* bridge, all bets are off.
*/
if (bus != 0 || pc->pc_intr_v != sioprimary)
return (NULL);
irq = PCIIDE_COMPAT_IRQ(chan);
#if NSIO
cookie = sio_intr_establish(NULL /*XXX*/, irq, IST_EDGE, IPL_BIO,
func, arg);
if (cookie == NULL)
return (NULL);
printf("%s: %s channel interrupting at %s\n", dev->dv_xname,
PCIIDE_CHANNEL_NAME(chan), sio_intr_string(NULL /*XXX*/, irq));
#endif
return (cookie);
}