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Diffstat (limited to 'arch/powerpc/kernel/pci_32.c')
-rw-r--r--arch/powerpc/kernel/pci_32.c150
1 files changed, 13 insertions, 137 deletions
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index bedb370459f..86585508e9c 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -167,150 +167,26 @@ pcibios_make_OF_bus_map(void)
#endif
}
-typedef int (*pci_OF_scan_iterator)(struct device_node* node, void* data);
-
-static struct device_node*
-scan_OF_pci_childs(struct device_node *parent, pci_OF_scan_iterator filter, void* data)
-{
- struct device_node *node;
- struct device_node* sub_node;
-
- for_each_child_of_node(parent, node) {
- const unsigned int *class_code;
-
- if (filter(node, data)) {
- of_node_put(node);
- return node;
- }
-
- /* For PCI<->PCI bridges or CardBus bridges, we go down
- * Note: some OFs create a parent node "multifunc-device" as
- * a fake root for all functions of a multi-function device,
- * we go down them as well.
- */
- class_code = of_get_property(node, "class-code", NULL);
- if ((!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
- (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) &&
- strcmp(node->name, "multifunc-device"))
- continue;
- sub_node = scan_OF_pci_childs(node, filter, data);
- if (sub_node) {
- of_node_put(node);
- return sub_node;
- }
- }
- return NULL;
-}
-
-static struct device_node *scan_OF_for_pci_dev(struct device_node *parent,
- unsigned int devfn)
-{
- struct device_node *np, *cnp;
- const u32 *reg;
- unsigned int psize;
-
- for_each_child_of_node(parent, np) {
- reg = of_get_property(np, "reg", &psize);
- if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn)
- return np;
-
- /* Note: some OFs create a parent node "multifunc-device" as
- * a fake root for all functions of a multi-function device,
- * we go down them as well. */
- if (!strcmp(np->name, "multifunc-device")) {
- cnp = scan_OF_for_pci_dev(np, devfn);
- if (cnp)
- return cnp;
- }
- }
- return NULL;
-}
-
-
-static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus)
-{
- struct device_node *parent, *np;
-
- /* Are we a root bus ? */
- if (bus->self == NULL || bus->parent == NULL) {
- struct pci_controller *hose = pci_bus_to_host(bus);
- if (hose == NULL)
- return NULL;
- return of_node_get(hose->dn);
- }
-
- /* not a root bus, we need to get our parent */
- parent = scan_OF_for_pci_bus(bus->parent);
- if (parent == NULL)
- return NULL;
-
- /* now iterate for children for a match */
- np = scan_OF_for_pci_dev(parent, bus->self->devfn);
- of_node_put(parent);
-
- return np;
-}
-
-/*
- * Scans the OF tree for a device node matching a PCI device
- */
-struct device_node *
-pci_busdev_to_OF_node(struct pci_bus *bus, int devfn)
-{
- struct device_node *parent, *np;
-
- pr_debug("pci_busdev_to_OF_node(%d,0x%x)\n", bus->number, devfn);
- parent = scan_OF_for_pci_bus(bus);
- if (parent == NULL)
- return NULL;
- pr_debug(" parent is %s\n", parent ? parent->full_name : "<NULL>");
- np = scan_OF_for_pci_dev(parent, devfn);
- of_node_put(parent);
- pr_debug(" result is %s\n", np ? np->full_name : "<NULL>");
-
- /* XXX most callers don't release the returned node
- * mostly because ppc64 doesn't increase the refcount,
- * we need to fix that.
- */
- return np;
-}
-EXPORT_SYMBOL(pci_busdev_to_OF_node);
-
-struct device_node*
-pci_device_to_OF_node(struct pci_dev *dev)
-{
- return pci_busdev_to_OF_node(dev->bus, dev->devfn);
-}
-EXPORT_SYMBOL(pci_device_to_OF_node);
-
-static int
-find_OF_pci_device_filter(struct device_node* node, void* data)
-{
- return ((void *)node == data);
-}
/*
* Returns the PCI device matching a given OF node
*/
-int
-pci_device_from_OF_node(struct device_node* node, u8* bus, u8* devfn)
+int pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
{
- const unsigned int *reg;
- struct pci_controller* hose;
- struct pci_dev* dev = NULL;
-
- /* Make sure it's really a PCI device */
- hose = pci_find_hose_for_OF_device(node);
- if (!hose || !hose->dn)
- return -ENODEV;
- if (!scan_OF_pci_childs(hose->dn,
- find_OF_pci_device_filter, (void *)node))
+ struct pci_dev *dev = NULL;
+ const __be32 *reg;
+ int size;
+
+ /* Check if it might have a chance to be a PCI device */
+ if (!pci_find_hose_for_OF_device(node))
return -ENODEV;
- reg = of_get_property(node, "reg", NULL);
- if (!reg)
+
+ reg = of_get_property(node, "reg", &size);
+ if (!reg || size < 5 * sizeof(u32))
return -ENODEV;
- *bus = (reg[0] >> 16) & 0xff;
- *devfn = ((reg[0] >> 8) & 0xff);
+
+ *bus = (be32_to_cpup(&reg[0]) >> 16) & 0xff;
+ *devfn = (be32_to_cpup(&reg[0]) >> 8) & 0xff;
/* Ok, here we need some tweak. If we have already renumbered
* all busses, we can't rely on the OF bus number any more.