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freebsd/sys/sparc64/pci/ofw_pci.c
Thomas Moestl 464ae30ee6 Make the OpenFirmware interrupt mapping code more generic, to reduce
the bus-dependent code and to be able to support more systems. The core
of the new code is mostly obtained from NetBSD.
Kluge the interrupt routing methods of the psycho and apb drivers so
that an intline of 0 can be handled for now; real routing is still not
possible (all intline registers are preinitialized instead); this will
require a sparc64-specific adaption of the driver for generic PCI-PCI
bridges with a custom routing method to work right.
2002-03-24 02:11:06 +00:00

203 lines
5.9 KiB
C

/*
* Copyright (c) 1999, 2000 Matthew R. Green
* All rights reserved.
* Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. 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. 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 ``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 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.
*
* from: NetBSD: psycho.c,v 1.35 2001/09/10 16:17:06 eeh Exp
*
* $FreeBSD$
*/
#include "opt_ofw_pci.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/ofw/ofw_pci.h>
#include <dev/ofw/openfirm.h>
#include <sparc64/pci/ofw_pci.h>
#include <machine/ofw_bus.h>
#include "pcib_if.h"
u_int32_t
ofw_pci_route_intr(phandle_t node)
{
u_int32_t rv;
rv = ofw_bus_route_intr(node, ORIP_NOINT);
if (rv == ORIR_NOTFOUND)
return (255);
return (rv);
}
#define OFW_PCI_PCIBUS "pci"
/*
* Walk the PCI bus hierarchy, starting with the root PCI bus and descending
* through bridges, and initialize the interrupt line configuration registers
* of attached devices using firmware information.
*/
void
ofw_pci_init_intr(device_t dev, phandle_t bus)
{
struct ofw_pci_register pcir;
phandle_t node;
char type[32];
int intr;
int freemap;
if ((node = OF_child(bus)) == 0)
return;
freemap = 0;
do {
if (node == -1)
panic("ofw_pci_init_intr: OF_child failed");
if (OF_getprop(node, "device_type", type, sizeof(type)) == -1)
type[0] = '\0';
else
type[sizeof(type) - 1] = '\0';
if (strcmp(type, OFW_PCI_PCIBUS) == 0) {
/*
* This is a pci-pci bridge, recurse to initialize the
* child bus. The hierarchy is usually at most 2 levels
* deep, so recursion is feasible.
*/
#ifdef OFW_PCI_DEBUG
device_printf(dev, "%s: descending to "
"subordinate PCI bus\n", __func__);
#endif
ofw_pci_init_intr(dev, node);
} else {
if (OF_getprop(node, "reg", &pcir, sizeof(pcir)) == -1)
panic("ofw_pci_route_intr: OF_getprop failed");
if ((intr = ofw_pci_route_intr(node)) != 255) {
#ifdef OFW_PCI_DEBUG
device_printf(dev, "%s: mapping intr for "
"%d/%d/%d to %d (preset was %d)\n",
__func__,
OFW_PCI_PHYS_HI_BUS(pcir.phys_hi),
OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi),
OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi),
intr,
(int)PCIB_READ_CONFIG(dev,
OFW_PCI_PHYS_HI_BUS(pcir.phys_hi),
OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi),
OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi),
PCIR_INTLINE, 1));
#endif /* OFW_PCI_DEBUG */
PCIB_WRITE_CONFIG(dev,
OFW_PCI_PHYS_HI_BUS(pcir.phys_hi),
OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi),
OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi),
PCIR_INTLINE, intr, 1);
} else {
#ifdef OFW_PCI_DEBUG
device_printf(dev, "%s: no interrupt "
"mapping found for %d/%d/%d (preset %d)\n",
__func__,
OFW_PCI_PHYS_HI_BUS(pcir.phys_hi),
OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi),
OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi),
(int)PCIB_READ_CONFIG(dev,
OFW_PCI_PHYS_HI_BUS(pcir.phys_hi),
OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi),
OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi),
PCIR_INTLINE, 1));
#endif /* OFW_PCI_DEBUG */
/* The firmware initializes to 0 instead 255 */
PCIB_WRITE_CONFIG(dev,
OFW_PCI_PHYS_HI_BUS(pcir.phys_hi),
OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi),
OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi),
PCIR_INTLINE, 255, 1);
}
}
} while ((node = OF_peer(node)) != 0);
}
phandle_t
ofw_pci_find_node(int bus, int slot, int func)
{
phandle_t node, bnode, parent;
struct ofw_pci_register pcir;
int br[2];
char name[16];
/* 1. Try to find the bus in question. */
bnode = 0;
name[sizeof(name) - 1] = '\0';
parent = OF_peer(0);
node = OF_child(parent);
while (node != 0 && node != -1) {
if (OF_getprop(node, "name", name, sizeof(name) - 1) != -1 &&
strcmp(name, "pci") == 0 &&
OF_getprop(node, "bus-range", br, sizeof(br)) != -1) {
/* Found the bus? */
if (bus == br[0]) {
bnode = node;
break;
}
/* Need to descend? */
if (bus > br[0] && bus <= br[1]) {
parent = node;
node = OF_child(node);
continue;
}
}
node = OF_peer(node);
}
if (bnode == 0)
return (0);
for (node = OF_child(bnode); node != 0 && node != -1;
node = OF_peer(node)) {
if (OF_getprop(node, "reg", &pcir, sizeof(pcir)) == -1)
continue;
if (OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi) == slot &&
OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi) == func) {
if (OFW_PCI_PHYS_HI_BUS(pcir.phys_hi) != bus)
panic("ofw_pci_find_node: bus number mismatch");
return (node);
}
}
return (0);
}
phandle_t
ofw_pci_node(device_t dev)
{
return (ofw_pci_find_node(pci_get_bus(dev), pci_get_slot(dev),
pci_get_function(dev)));
}