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/*
* 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)));
}
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