/*
* Support for PCI bridges found on Power Macintoshes.
- * At present the "bandit" and "chaos" bridges are supported.
- * Fortunately you access configuration space in the same
- * way with either bridge.
*
* Copyright (C) 2003 Benjamin Herrenschmuidt (benh@kernel.crashing.org)
* Copyright (C) 1997 Paul Mackerras (paulus@samba.org)
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
#include <asm/pmac_feature.h>
+#ifdef CONFIG_PPC64
+#include <asm/iommu.h>
+#include <asm/ppc-pci.h>
+#endif
#undef DEBUG
static int macrisc_read_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 *val)
{
- struct pci_controller *hose = bus->sysdata;
+ struct pci_controller *hose;
unsigned long addr;
+ hose = pci_bus_to_host(bus);
+ if (hose == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
if (!addr)
return PCIBIOS_DEVICE_NOT_FOUND;
static int macrisc_write_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 val)
{
- struct pci_controller *hose = bus->sysdata;
+ struct pci_controller *hose;
unsigned long addr;
+ hose = pci_bus_to_host(bus);
+ if (hose == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
if (!addr)
return PCIBIOS_DEVICE_NOT_FOUND;
};
/*
- * Verifiy that a specific (bus, dev_fn) exists on chaos
+ * Verify that a specific (bus, dev_fn) exists on chaos
*/
static int
chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
};
#ifdef CONFIG_POWER4
-
/*
* These versions of U3 HyperTransport config space access ops do not
* implement self-view of the HT host yet
static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 *val)
{
- struct pci_controller *hose = bus->sysdata;
+ struct pci_controller *hose;
unsigned long addr;
- struct device_node *np = pci_busdev_to_OF_node(bus, devfn);
- if (np == NULL)
+ hose = pci_bus_to_host(bus);
+ if (hose == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
case 0:
break;
case 1:
- switch (len) {
- case 1:
- *val = 0xff; break;
- case 2:
- *val = 0xffff; break;
- default:
- *val = 0xfffffffful; break;
- }
- return PCIBIOS_SUCCESSFUL;
+ switch (len) {
+ case 1:
+ *val = 0xff; break;
+ case 2:
+ *val = 0xffff; break;
+ default:
+ *val = 0xfffffffful; break;
+ }
+ return PCIBIOS_SUCCESSFUL;
default:
return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
+ }
+
/*
* Note: the caller has already checked that offset is
* suitably aligned and that len is 1, 2 or 4.
static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 val)
{
- struct pci_controller *hose = bus->sysdata;
+ struct pci_controller *hose;
unsigned long addr;
- struct device_node *np = pci_busdev_to_OF_node(bus, devfn);
- if (np == NULL)
+ hose = pci_bus_to_host(bus);
+ if (hose == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
u3_ht_read_config,
u3_ht_write_config
};
-
#endif /* CONFIG_POWER4 */
/*
* For a bandit bridge, turn on cache coherency if necessary.
* N.B. we could clean this up using the hose ops directly.
*/
-static void __init
-init_bandit(struct pci_controller *bp)
+static void __init init_bandit(struct pci_controller *bp)
{
unsigned int vendev, magic;
int rev;
/*
* Tweak the PCI-PCI bridge chip on the blue & white G3s.
*/
-static void __init
-init_p2pbridge(void)
+static void __init init_p2pbridge(void)
{
struct device_node *p2pbridge;
struct pci_controller* hose;
* EHCI part of it so it behaves like a pair of OHCI's. This fixup
* code re-enables it ;)
*/
-static void __init
-fixup_nec_usb2(void)
+static void __init fixup_nec_usb2(void)
{
struct device_node *nec;
}
}
-void __init
-pmac_find_bridges(void)
-{
- struct device_node *np, *root;
- struct device_node *ht = NULL;
-
- root = of_find_node_by_path("/");
- if (root == NULL) {
- printk(KERN_CRIT "pmac_find_bridges: can't find root of device tree\n");
- return;
- }
- for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
- if (np->name == NULL)
- continue;
- if (strcmp(np->name, "bandit") == 0
- || strcmp(np->name, "chaos") == 0
- || strcmp(np->name, "pci") == 0) {
- if (add_bridge(np) == 0)
- of_node_get(np);
- }
- if (strcmp(np->name, "ht") == 0) {
- of_node_get(np);
- ht = np;
- }
- }
- of_node_put(root);
-
- /* Probe HT last as it relies on the agp resources to be already
- * setup
- */
- if (ht && add_bridge(ht) != 0)
- of_node_put(ht);
-
- init_p2pbridge();
- fixup_nec_usb2();
-
- /* We are still having some issues with the Xserve G4, enabling
- * some offset between bus number and domains for now when we
- * assign all busses should help for now
- */
- if (pci_assign_all_busses)
- pcibios_assign_bus_offset = 0x10;
-
-#ifdef CONFIG_POWER4
- /* There is something wrong with DMA on U3/HT. I haven't figured out
- * the details yet, but if I set the cache line size to 128 bytes like
- * it should, I'm getting memory corruption caused by devices like
- * sungem (even without the MWI bit set, but maybe sungem doesn't
- * care). Right now, it appears that setting up a 64 bytes line size
- * works properly, 64 bytes beeing the max transfer size of HT, I
- * suppose this is related the way HT/PCI are hooked together. I still
- * need to dive into more specs though to be really sure of what's
- * going on. --BenH.
- *
- * Ok, apparently, it's just that HT can't do more than 64 bytes
- * transactions. MWI seem to be meaningless there as well, it may
- * be worth nop'ing out pci_set_mwi too though I haven't done that
- * yet.
- *
- * Note that it's a bit different for whatever is in the AGP slot.
- * For now, I don't care, but this can become a real issue, we
- * should probably hook pci_set_mwi anyway to make sure it sets
- * the real cache line size in there.
- */
- if (machine_is_compatible("MacRISC4"))
- pci_cache_line_size = 16; /* 64 bytes */
-
- pmac_check_ht_link();
-#endif /* CONFIG_POWER4 */
-}
-
#define GRACKLE_CFA(b, d, o) (0x80 | ((b) << 8) | ((d) << 16) \
| (((o) & ~3) << 24))
}
#ifdef CONFIG_POWER4
-
static void __init setup_u3_agp(struct pci_controller* hose)
{
/* On G5, we move AGP up to high bus number so we don't need
* the reg address cell, we shall fix that by killing struct
* reg_property and using some accessor functions instead
*/
- hose->first_busno = 0xf0;
+ hose->first_busno = 0xf0;
hose->last_busno = 0xff;
has_uninorth = 1;
hose->ops = ¯isc_pci_ops;
*/
hose->io_base_phys = 0xf4000000;
hose->io_base_virt = ioremap(hose->io_base_phys, 0x00400000);
- isa_io_base = (unsigned long) hose->io_base_virt;
+ isa_io_base = pci_io_base = (unsigned long) hose->io_base_virt;
hose->io_resource.name = np->full_name;
hose->io_resource.start = 0;
hose->io_resource.end = 0x003fffff;
}
/* No, it's not the case, we need a hole */
if (cur == 2) {
- /* not enough resources to make a hole, we drop part of the range */
+ /* not enough resources for a hole, we drop part of the range */
printk(KERN_WARNING "Running out of resources for /ht host !\n");
hose->mem_resources[cur].end = res->start - 1;
continue;
}
cur++;
- DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
+ DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
cur-1, res->start - 1, cur, res->end + 1);
hose->mem_resources[cur].name = np->full_name;
hose->mem_resources[cur].flags = IORESOURCE_MEM;
if (device_is_compatible(dev, "uni-north")) {
primary = setup_uninorth(hose, addr);
disp_name = "UniNorth";
- } else if (strcmp(dev->name, "pci") == 0) {
+ } else if (strcmp(dev->name, "pci") == 0) {
/* XXX assume this is a mpc106 (grackle) */
setup_grackle(hose);
disp_name = "Grackle (MPC106)";
disp_name = "Chaos";
primary = 0;
}
- printk(KERN_INFO "Found %s PCI host bridge at 0x%08x. Firmware bus number: %d->%d\n",
+ printk(KERN_INFO "Found %s PCI host bridge at 0x%08lx. Firmware bus number: %d->%d\n",
disp_name, addr->address, hose->first_busno, hose->last_busno);
DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
hose, hose->cfg_addr, hose->cfg_data);
pcibios_fixup_OF_interrupts();
}
+void __init pmac_find_bridges(void)
+{
+ struct device_node *np, *root;
+ struct device_node *ht = NULL;
+
+ root = of_find_node_by_path("/");
+ if (root == NULL) {
+ printk(KERN_CRIT "pmac_find_bridges: can't find root of device tree\n");
+ return;
+ }
+ for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
+ if (np->name == NULL)
+ continue;
+ if (strcmp(np->name, "bandit") == 0
+ || strcmp(np->name, "chaos") == 0
+ || strcmp(np->name, "pci") == 0) {
+ if (add_bridge(np) == 0)
+ of_node_get(np);
+ }
+ if (strcmp(np->name, "ht") == 0) {
+ of_node_get(np);
+ ht = np;
+ }
+ }
+ of_node_put(root);
+
+ /* Probe HT last as it relies on the agp resources to be already
+ * setup
+ */
+ if (ht && add_bridge(ht) != 0)
+ of_node_put(ht);
+
+ init_p2pbridge();
+ fixup_nec_usb2();
+
+ /* We are still having some issues with the Xserve G4, enabling
+ * some offset between bus number and domains for now when we
+ * assign all busses should help for now
+ */
+ if (pci_assign_all_busses)
+ pcibios_assign_bus_offset = 0x10;
+
+}
+
int
pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
{
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