2 * Support for PCI bridges found on Power Macintoshes.
4 * Copyright (C) 2003-2005 Benjamin Herrenschmuidt (benh@kernel.crashing.org)
5 * Copyright (C) 1997 Paul Mackerras (paulus@samba.org)
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
13 #include <linux/kernel.h>
14 #include <linux/pci.h>
15 #include <linux/delay.h>
16 #include <linux/string.h>
17 #include <linux/init.h>
18 #include <linux/bootmem.h>
19 #include <linux/irq.h>
21 #include <asm/sections.h>
24 #include <asm/pci-bridge.h>
25 #include <asm/machdep.h>
26 #include <asm/pmac_feature.h>
27 #include <asm/grackle.h>
28 #include <asm/ppc-pci.h>
33 #define DBG(x...) printk(x)
38 /* XXX Could be per-controller, but I don't think we risk anything by
39 * assuming we won't have both UniNorth and Bandit */
40 static int has_uninorth;
42 static struct pci_controller *u3_agp;
43 static struct pci_controller *u4_pcie;
44 static struct pci_controller *u3_ht;
46 static int has_second_ohare;
47 #endif /* CONFIG_PPC64 */
49 extern int pcibios_assign_bus_offset;
51 struct device_node *k2_skiplist[2];
54 * Magic constants for enabling cache coherency in the bandit/PSX bridge.
56 #define BANDIT_DEVID_2 8
57 #define BANDIT_REVID 3
59 #define BANDIT_DEVNUM 11
60 #define BANDIT_MAGIC 0x50
61 #define BANDIT_COHERENT 0x40
63 static int __init fixup_one_level_bus_range(struct device_node *node, int higher)
65 for (; node != 0;node = node->sibling) {
66 const int * bus_range;
67 const unsigned int *class_code;
70 /* For PCI<->PCI bridges or CardBus bridges, we go down */
71 class_code = of_get_property(node, "class-code", NULL);
72 if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
73 (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
75 bus_range = of_get_property(node, "bus-range", &len);
76 if (bus_range != NULL && len > 2 * sizeof(int)) {
77 if (bus_range[1] > higher)
78 higher = bus_range[1];
80 higher = fixup_one_level_bus_range(node->child, higher);
85 /* This routine fixes the "bus-range" property of all bridges in the
86 * system since they tend to have their "last" member wrong on macs
88 * Note that the bus numbers manipulated here are OF bus numbers, they
89 * are not Linux bus numbers.
91 static void __init fixup_bus_range(struct device_node *bridge)
94 struct property *prop;
96 /* Lookup the "bus-range" property for the hose */
97 prop = of_find_property(bridge, "bus-range", &len);
98 if (prop == NULL || prop->length < 2 * sizeof(int))
101 bus_range = prop->value;
102 bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
106 * Apple MacRISC (U3, UniNorth, Bandit, Chaos) PCI controllers.
108 * The "Bandit" version is present in all early PCI PowerMacs,
109 * and up to the first ones using Grackle. Some machines may
110 * have 2 bandit controllers (2 PCI busses).
112 * "Chaos" is used in some "Bandit"-type machines as a bridge
113 * for the separate display bus. It is accessed the same
114 * way as bandit, but cannot be probed for devices. It therefore
115 * has its own config access functions.
117 * The "UniNorth" version is present in all Core99 machines
118 * (iBook, G4, new IMacs, and all the recent Apple machines).
119 * It contains 3 controllers in one ASIC.
121 * The U3 is the bridge used on G5 machines. It contains an
122 * AGP bus which is dealt with the old UniNorth access routines
123 * and a HyperTransport bus which uses its own set of access
127 #define MACRISC_CFA0(devfn, off) \
128 ((1 << (unsigned int)PCI_SLOT(dev_fn)) \
129 | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
130 | (((unsigned int)(off)) & 0xFCUL))
132 #define MACRISC_CFA1(bus, devfn, off) \
133 ((((unsigned int)(bus)) << 16) \
134 |(((unsigned int)(devfn)) << 8) \
135 |(((unsigned int)(off)) & 0xFCUL) \
138 static volatile void __iomem *macrisc_cfg_access(struct pci_controller* hose,
139 u8 bus, u8 dev_fn, u8 offset)
143 if (bus == hose->first_busno) {
144 if (dev_fn < (11 << 3))
146 caddr = MACRISC_CFA0(dev_fn, offset);
148 caddr = MACRISC_CFA1(bus, dev_fn, offset);
150 /* Uninorth will return garbage if we don't read back the value ! */
152 out_le32(hose->cfg_addr, caddr);
153 } while (in_le32(hose->cfg_addr) != caddr);
155 offset &= has_uninorth ? 0x07 : 0x03;
156 return hose->cfg_data + offset;
159 static int macrisc_read_config(struct pci_bus *bus, unsigned int devfn,
160 int offset, int len, u32 *val)
162 struct pci_controller *hose;
163 volatile void __iomem *addr;
165 hose = pci_bus_to_host(bus);
167 return PCIBIOS_DEVICE_NOT_FOUND;
169 return PCIBIOS_BAD_REGISTER_NUMBER;
170 addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
172 return PCIBIOS_DEVICE_NOT_FOUND;
174 * Note: the caller has already checked that offset is
175 * suitably aligned and that len is 1, 2 or 4.
182 *val = in_le16(addr);
185 *val = in_le32(addr);
188 return PCIBIOS_SUCCESSFUL;
191 static int macrisc_write_config(struct pci_bus *bus, unsigned int devfn,
192 int offset, int len, u32 val)
194 struct pci_controller *hose;
195 volatile void __iomem *addr;
197 hose = pci_bus_to_host(bus);
199 return PCIBIOS_DEVICE_NOT_FOUND;
201 return PCIBIOS_BAD_REGISTER_NUMBER;
202 addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
204 return PCIBIOS_DEVICE_NOT_FOUND;
206 * Note: the caller has already checked that offset is
207 * suitably aligned and that len is 1, 2 or 4.
216 (void) in_le16(addr);
220 (void) in_le32(addr);
223 return PCIBIOS_SUCCESSFUL;
226 static struct pci_ops macrisc_pci_ops =
234 * Verify that a specific (bus, dev_fn) exists on chaos
236 static int chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
238 struct device_node *np;
239 const u32 *vendor, *device;
242 return PCIBIOS_BAD_REGISTER_NUMBER;
243 np = pci_busdev_to_OF_node(bus, devfn);
245 return PCIBIOS_DEVICE_NOT_FOUND;
247 vendor = of_get_property(np, "vendor-id", NULL);
248 device = of_get_property(np, "device-id", NULL);
249 if (vendor == NULL || device == NULL)
250 return PCIBIOS_DEVICE_NOT_FOUND;
252 if ((*vendor == 0x106b) && (*device == 3) && (offset >= 0x10)
253 && (offset != 0x14) && (offset != 0x18) && (offset <= 0x24))
254 return PCIBIOS_BAD_REGISTER_NUMBER;
256 return PCIBIOS_SUCCESSFUL;
260 chaos_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
263 int result = chaos_validate_dev(bus, devfn, offset);
264 if (result == PCIBIOS_BAD_REGISTER_NUMBER)
266 if (result != PCIBIOS_SUCCESSFUL)
268 return macrisc_read_config(bus, devfn, offset, len, val);
272 chaos_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
275 int result = chaos_validate_dev(bus, devfn, offset);
276 if (result != PCIBIOS_SUCCESSFUL)
278 return macrisc_write_config(bus, devfn, offset, len, val);
281 static struct pci_ops chaos_pci_ops =
287 static void __init setup_chaos(struct pci_controller *hose,
288 struct resource *addr)
290 /* assume a `chaos' bridge */
291 hose->ops = &chaos_pci_ops;
292 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
293 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
295 #endif /* CONFIG_PPC32 */
299 * These versions of U3 HyperTransport config space access ops do not
300 * implement self-view of the HT host yet
304 * This function deals with some "special cases" devices.
306 * 0 -> No special case
307 * 1 -> Skip the device but act as if the access was successfull
308 * (return 0xff's on reads, eventually, cache config space
309 * accesses in a later version)
310 * -1 -> Hide the device (unsuccessful acess)
312 static int u3_ht_skip_device(struct pci_controller *hose,
313 struct pci_bus *bus, unsigned int devfn)
315 struct device_node *busdn, *dn;
318 /* We only allow config cycles to devices that are in OF device-tree
319 * as we are apparently having some weird things going on with some
320 * revs of K2 on recent G5s
323 busdn = pci_device_to_OF_node(bus->self);
325 busdn = hose->arch_data;
326 for (dn = busdn->child; dn; dn = dn->sibling)
327 if (PCI_DN(dn) && PCI_DN(dn)->devfn == devfn)
333 * When a device in K2 is powered down, we die on config
334 * cycle accesses. Fix that here.
337 if (k2_skiplist[i] == dn)
343 #define U3_HT_CFA0(devfn, off) \
344 ((((unsigned int)devfn) << 8) | offset)
345 #define U3_HT_CFA1(bus, devfn, off) \
346 (U3_HT_CFA0(devfn, off) \
347 + (((unsigned int)bus) << 16) \
350 static volatile void __iomem *u3_ht_cfg_access(struct pci_controller* hose,
351 u8 bus, u8 devfn, u8 offset)
353 if (bus == hose->first_busno) {
354 /* For now, we don't self probe U3 HT bridge */
355 if (PCI_SLOT(devfn) == 0)
357 return hose->cfg_data + U3_HT_CFA0(devfn, offset);
359 return hose->cfg_data + U3_HT_CFA1(bus, devfn, offset);
362 static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
363 int offset, int len, u32 *val)
365 struct pci_controller *hose;
366 volatile void __iomem *addr;
368 hose = pci_bus_to_host(bus);
370 return PCIBIOS_DEVICE_NOT_FOUND;
372 return PCIBIOS_BAD_REGISTER_NUMBER;
373 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
375 return PCIBIOS_DEVICE_NOT_FOUND;
377 switch (u3_ht_skip_device(hose, bus, devfn)) {
385 *val = 0xffff; break;
387 *val = 0xfffffffful; break;
389 return PCIBIOS_SUCCESSFUL;
391 return PCIBIOS_DEVICE_NOT_FOUND;
395 * Note: the caller has already checked that offset is
396 * suitably aligned and that len is 1, 2 or 4.
403 *val = in_le16(addr);
406 *val = in_le32(addr);
409 return PCIBIOS_SUCCESSFUL;
412 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
413 int offset, int len, u32 val)
415 struct pci_controller *hose;
416 volatile void __iomem *addr;
418 hose = pci_bus_to_host(bus);
420 return PCIBIOS_DEVICE_NOT_FOUND;
422 return PCIBIOS_BAD_REGISTER_NUMBER;
423 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
425 return PCIBIOS_DEVICE_NOT_FOUND;
427 switch (u3_ht_skip_device(hose, bus, devfn)) {
431 return PCIBIOS_SUCCESSFUL;
433 return PCIBIOS_DEVICE_NOT_FOUND;
437 * Note: the caller has already checked that offset is
438 * suitably aligned and that len is 1, 2 or 4.
447 (void) in_le16(addr);
450 out_le32((u32 __iomem *)addr, val);
451 (void) in_le32(addr);
454 return PCIBIOS_SUCCESSFUL;
457 static struct pci_ops u3_ht_pci_ops =
463 #define U4_PCIE_CFA0(devfn, off) \
464 ((1 << ((unsigned int)PCI_SLOT(dev_fn))) \
465 | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
466 | ((((unsigned int)(off)) >> 8) << 28) \
467 | (((unsigned int)(off)) & 0xfcU))
469 #define U4_PCIE_CFA1(bus, devfn, off) \
470 ((((unsigned int)(bus)) << 16) \
471 |(((unsigned int)(devfn)) << 8) \
472 | ((((unsigned int)(off)) >> 8) << 28) \
473 |(((unsigned int)(off)) & 0xfcU) \
476 static volatile void __iomem *u4_pcie_cfg_access(struct pci_controller* hose,
477 u8 bus, u8 dev_fn, int offset)
481 if (bus == hose->first_busno) {
482 caddr = U4_PCIE_CFA0(dev_fn, offset);
484 caddr = U4_PCIE_CFA1(bus, dev_fn, offset);
486 /* Uninorth will return garbage if we don't read back the value ! */
488 out_le32(hose->cfg_addr, caddr);
489 } while (in_le32(hose->cfg_addr) != caddr);
492 return hose->cfg_data + offset;
495 static int u4_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
496 int offset, int len, u32 *val)
498 struct pci_controller *hose;
499 volatile void __iomem *addr;
501 hose = pci_bus_to_host(bus);
503 return PCIBIOS_DEVICE_NOT_FOUND;
504 if (offset >= 0x1000)
505 return PCIBIOS_BAD_REGISTER_NUMBER;
506 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
508 return PCIBIOS_DEVICE_NOT_FOUND;
510 * Note: the caller has already checked that offset is
511 * suitably aligned and that len is 1, 2 or 4.
518 *val = in_le16(addr);
521 *val = in_le32(addr);
524 return PCIBIOS_SUCCESSFUL;
527 static int u4_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
528 int offset, int len, u32 val)
530 struct pci_controller *hose;
531 volatile void __iomem *addr;
533 hose = pci_bus_to_host(bus);
535 return PCIBIOS_DEVICE_NOT_FOUND;
536 if (offset >= 0x1000)
537 return PCIBIOS_BAD_REGISTER_NUMBER;
538 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
540 return PCIBIOS_DEVICE_NOT_FOUND;
542 * Note: the caller has already checked that offset is
543 * suitably aligned and that len is 1, 2 or 4.
552 (void) in_le16(addr);
556 (void) in_le32(addr);
559 return PCIBIOS_SUCCESSFUL;
562 static struct pci_ops u4_pcie_pci_ops =
568 #endif /* CONFIG_PPC64 */
572 * For a bandit bridge, turn on cache coherency if necessary.
573 * N.B. we could clean this up using the hose ops directly.
575 static void __init init_bandit(struct pci_controller *bp)
577 unsigned int vendev, magic;
580 /* read the word at offset 0 in config space for device 11 */
581 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_VENDOR_ID);
583 vendev = in_le32(bp->cfg_data);
584 if (vendev == (PCI_DEVICE_ID_APPLE_BANDIT << 16) +
585 PCI_VENDOR_ID_APPLE) {
586 /* read the revision id */
587 out_le32(bp->cfg_addr,
588 (1UL << BANDIT_DEVNUM) + PCI_REVISION_ID);
590 rev = in_8(bp->cfg_data);
591 if (rev != BANDIT_REVID)
593 "Unknown revision %d for bandit\n", rev);
594 } else if (vendev != (BANDIT_DEVID_2 << 16) + PCI_VENDOR_ID_APPLE) {
595 printk(KERN_WARNING "bandit isn't? (%x)\n", vendev);
599 /* read the word at offset 0x50 */
600 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + BANDIT_MAGIC);
602 magic = in_le32(bp->cfg_data);
603 if ((magic & BANDIT_COHERENT) != 0)
605 magic |= BANDIT_COHERENT;
607 out_le32(bp->cfg_data, magic);
608 printk(KERN_INFO "Cache coherency enabled for bandit/PSX\n");
612 * Tweak the PCI-PCI bridge chip on the blue & white G3s.
614 static void __init init_p2pbridge(void)
616 struct device_node *p2pbridge;
617 struct pci_controller* hose;
621 /* XXX it would be better here to identify the specific
622 PCI-PCI bridge chip we have. */
623 p2pbridge = of_find_node_by_name(NULL, "pci-bridge");
624 if (p2pbridge == NULL
625 || p2pbridge->parent == NULL
626 || strcmp(p2pbridge->parent->name, "pci") != 0)
628 if (pci_device_from_OF_node(p2pbridge, &bus, &devfn) < 0) {
629 DBG("Can't find PCI infos for PCI<->PCI bridge\n");
632 /* Warning: At this point, we have not yet renumbered all busses.
633 * So we must use OF walking to find out hose
635 hose = pci_find_hose_for_OF_device(p2pbridge);
637 DBG("Can't find hose for PCI<->PCI bridge\n");
640 if (early_read_config_word(hose, bus, devfn,
641 PCI_BRIDGE_CONTROL, &val) < 0) {
642 printk(KERN_ERR "init_p2pbridge: couldn't read bridge"
646 val &= ~PCI_BRIDGE_CTL_MASTER_ABORT;
647 early_write_config_word(hose, bus, devfn, PCI_BRIDGE_CONTROL, val);
649 of_node_put(p2pbridge);
652 static void __init init_second_ohare(void)
654 struct device_node *np = of_find_node_by_name(NULL, "pci106b,7");
655 unsigned char bus, devfn;
661 /* This must run before we initialize the PICs since the second
662 * ohare hosts a PIC that will be accessed there.
664 if (pci_device_from_OF_node(np, &bus, &devfn) == 0) {
665 struct pci_controller* hose =
666 pci_find_hose_for_OF_device(np);
668 printk(KERN_ERR "Can't find PCI hose for OHare2 !\n");
671 early_read_config_word(hose, bus, devfn, PCI_COMMAND, &cmd);
672 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
673 cmd &= ~PCI_COMMAND_IO;
674 early_write_config_word(hose, bus, devfn, PCI_COMMAND, cmd);
676 has_second_ohare = 1;
680 * Some Apple desktop machines have a NEC PD720100A USB2 controller
681 * on the motherboard. Open Firmware, on these, will disable the
682 * EHCI part of it so it behaves like a pair of OHCI's. This fixup
683 * code re-enables it ;)
685 static void __init fixup_nec_usb2(void)
687 struct device_node *nec;
689 for (nec = NULL; (nec = of_find_node_by_name(nec, "usb")) != NULL;) {
690 struct pci_controller *hose;
695 prop = of_get_property(nec, "vendor-id", NULL);
700 prop = of_get_property(nec, "device-id", NULL);
705 prop = of_get_property(nec, "reg", NULL);
708 devfn = (prop[0] >> 8) & 0xff;
709 bus = (prop[0] >> 16) & 0xff;
710 if (PCI_FUNC(devfn) != 0)
712 hose = pci_find_hose_for_OF_device(nec);
715 early_read_config_dword(hose, bus, devfn, 0xe4, &data);
717 printk("Found NEC PD720100A USB2 chip with disabled"
718 " EHCI, fixing up...\n");
720 early_write_config_dword(hose, bus, devfn, 0xe4, data);
725 static void __init setup_bandit(struct pci_controller *hose,
726 struct resource *addr)
728 hose->ops = ¯isc_pci_ops;
729 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
730 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
734 static int __init setup_uninorth(struct pci_controller *hose,
735 struct resource *addr)
737 pci_assign_all_buses = 1;
739 hose->ops = ¯isc_pci_ops;
740 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
741 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
742 /* We "know" that the bridge at f2000000 has the PCI slots. */
743 return addr->start == 0xf2000000;
745 #endif /* CONFIG_PPC32 */
748 static void __init setup_u3_agp(struct pci_controller* hose)
750 /* On G5, we move AGP up to high bus number so we don't need
751 * to reassign bus numbers for HT. If we ever have P2P bridges
752 * on AGP, we'll have to move pci_assign_all_busses to the
753 * pci_controller structure so we enable it for AGP and not for
755 * We hard code the address because of the different size of
756 * the reg address cell, we shall fix that by killing struct
757 * reg_property and using some accessor functions instead
759 hose->first_busno = 0xf0;
760 hose->last_busno = 0xff;
762 hose->ops = ¯isc_pci_ops;
763 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
764 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
768 static void __init setup_u4_pcie(struct pci_controller* hose)
770 /* We currently only implement the "non-atomic" config space, to
771 * be optimised later.
773 hose->ops = &u4_pcie_pci_ops;
774 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
775 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
777 /* The bus contains a bridge from root -> device, we need to
778 * make it visible on bus 0 so that we pick the right type
779 * of config cycles. If we didn't, we would have to force all
780 * config cycles to be type 1. So we override the "bus-range"
783 hose->first_busno = 0x00;
784 hose->last_busno = 0xff;
788 static void __init setup_u3_ht(struct pci_controller* hose)
790 struct device_node *np = (struct device_node *)hose->arch_data;
791 struct pci_controller *other = NULL;
795 hose->ops = &u3_ht_pci_ops;
797 /* We hard code the address because of the different size of
798 * the reg address cell, we shall fix that by killing struct
799 * reg_property and using some accessor functions instead
801 hose->cfg_data = ioremap(0xf2000000, 0x02000000);
804 * /ht node doesn't expose a "ranges" property, so we "remove"
805 * regions that have been allocated to AGP. So far, this version of
806 * the code doesn't assign any of the 0xfxxxxxxx "fine" memory regions
807 * to /ht. We need to fix that sooner or later by either parsing all
808 * child "ranges" properties or figuring out the U3 address space
809 * decoding logic and then read its configuration register (if any).
811 hose->io_base_phys = 0xf4000000;
812 hose->pci_io_size = 0x00400000;
813 hose->io_resource.name = np->full_name;
814 hose->io_resource.start = 0;
815 hose->io_resource.end = 0x003fffff;
816 hose->io_resource.flags = IORESOURCE_IO;
817 hose->pci_mem_offset = 0;
818 hose->first_busno = 0;
819 hose->last_busno = 0xef;
820 hose->mem_resources[0].name = np->full_name;
821 hose->mem_resources[0].start = 0x80000000;
822 hose->mem_resources[0].end = 0xefffffff;
823 hose->mem_resources[0].flags = IORESOURCE_MEM;
829 else if (u4_pcie != NULL)
833 DBG("U3/4 has no AGP/PCIE, using full resource range\n");
837 /* Fixup bus range vs. PCIE */
839 hose->last_busno = u4_pcie->first_busno - 1;
841 /* We "remove" the AGP resources from the resources allocated to HT,
842 * that is we create "holes". However, that code does assumptions
843 * that so far happen to be true (cross fingers...), typically that
844 * resources in the AGP node are properly ordered
847 for (i=0; i<3; i++) {
848 struct resource *res = &other->mem_resources[i];
849 if (res->flags != IORESOURCE_MEM)
851 /* We don't care about "fine" resources */
852 if (res->start >= 0xf0000000)
854 /* Check if it's just a matter of "shrinking" us in one
857 if (hose->mem_resources[cur].start == res->start) {
858 DBG("U3/HT: shrink start of %d, %08lx -> %08lx\n",
859 cur, hose->mem_resources[cur].start,
861 hose->mem_resources[cur].start = res->end + 1;
864 if (hose->mem_resources[cur].end == res->end) {
865 DBG("U3/HT: shrink end of %d, %08lx -> %08lx\n",
866 cur, hose->mem_resources[cur].end,
868 hose->mem_resources[cur].end = res->start - 1;
871 /* No, it's not the case, we need a hole */
873 /* not enough resources for a hole, we drop part
876 printk(KERN_WARNING "Running out of resources"
877 " for /ht host !\n");
878 hose->mem_resources[cur].end = res->start - 1;
882 DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
883 cur-1, res->start - 1, cur, res->end + 1);
884 hose->mem_resources[cur].name = np->full_name;
885 hose->mem_resources[cur].flags = IORESOURCE_MEM;
886 hose->mem_resources[cur].start = res->end + 1;
887 hose->mem_resources[cur].end = hose->mem_resources[cur-1].end;
888 hose->mem_resources[cur-1].end = res->start - 1;
891 #endif /* CONFIG_PPC64 */
894 * We assume that if we have a G3 powermac, we have one bridge called
895 * "pci" (a MPC106) and no bandit or chaos bridges, and contrariwise,
896 * if we have one or more bandit or chaos bridges, we don't have a MPC106.
898 static int __init pmac_add_bridge(struct device_node *dev)
901 struct pci_controller *hose;
902 struct resource rsrc;
904 const int *bus_range;
905 int primary = 1, has_address = 0;
907 DBG("Adding PCI host bridge %s\n", dev->full_name);
909 /* Fetch host bridge registers address */
910 has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
912 /* Get bus range if any */
913 bus_range = of_get_property(dev, "bus-range", &len);
914 if (bus_range == NULL || len < 2 * sizeof(int)) {
915 printk(KERN_WARNING "Can't get bus-range for %s, assume"
916 " bus 0\n", dev->full_name);
919 hose = pcibios_alloc_controller(dev);
922 hose->first_busno = bus_range ? bus_range[0] : 0;
923 hose->last_busno = bus_range ? bus_range[1] : 0xff;
927 /* 64 bits only bridges */
929 if (of_device_is_compatible(dev, "u3-agp")) {
931 disp_name = "U3-AGP";
933 } else if (of_device_is_compatible(dev, "u3-ht")) {
937 } else if (of_device_is_compatible(dev, "u4-pcie")) {
939 disp_name = "U4-PCIE";
942 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number:"
943 " %d->%d\n", disp_name, hose->first_busno, hose->last_busno);
944 #endif /* CONFIG_PPC64 */
946 /* 32 bits only bridges */
948 if (of_device_is_compatible(dev, "uni-north")) {
949 primary = setup_uninorth(hose, &rsrc);
950 disp_name = "UniNorth";
951 } else if (strcmp(dev->name, "pci") == 0) {
952 /* XXX assume this is a mpc106 (grackle) */
954 disp_name = "Grackle (MPC106)";
955 } else if (strcmp(dev->name, "bandit") == 0) {
956 setup_bandit(hose, &rsrc);
957 disp_name = "Bandit";
958 } else if (strcmp(dev->name, "chaos") == 0) {
959 setup_chaos(hose, &rsrc);
963 printk(KERN_INFO "Found %s PCI host bridge at 0x%016llx. "
964 "Firmware bus number: %d->%d\n",
965 disp_name, (unsigned long long)rsrc.start, hose->first_busno,
967 #endif /* CONFIG_PPC32 */
969 DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
970 hose, hose->cfg_addr, hose->cfg_data);
972 /* Interpret the "ranges" property */
973 /* This also maps the I/O region and sets isa_io/mem_base */
974 pci_process_bridge_OF_ranges(hose, dev, primary);
976 /* Fixup "bus-range" OF property */
977 fixup_bus_range(dev);
982 void __devinit pmac_pci_irq_fixup(struct pci_dev *dev)
985 /* Fixup interrupt for the modem/ethernet combo controller.
986 * on machines with a second ohare chip.
987 * The number in the device tree (27) is bogus (correct for
988 * the ethernet-only board but not the combo ethernet/modem
989 * board). The real interrupt is 28 on the second controller
992 if (has_second_ohare &&
993 dev->vendor == PCI_VENDOR_ID_DEC &&
994 dev->device == PCI_DEVICE_ID_DEC_TULIP_PLUS) {
995 dev->irq = irq_create_mapping(NULL, 60);
996 set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
998 #endif /* CONFIG_PPC32 */
1001 void __init pmac_pci_init(void)
1003 struct device_node *np, *root;
1004 struct device_node *ht = NULL;
1006 root = of_find_node_by_path("/");
1008 printk(KERN_CRIT "pmac_pci_init: can't find root "
1009 "of device tree\n");
1012 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
1013 if (np->name == NULL)
1015 if (strcmp(np->name, "bandit") == 0
1016 || strcmp(np->name, "chaos") == 0
1017 || strcmp(np->name, "pci") == 0) {
1018 if (pmac_add_bridge(np) == 0)
1021 if (strcmp(np->name, "ht") == 0) {
1029 /* Probe HT last as it relies on the agp resources to be already
1032 if (ht && pmac_add_bridge(ht) != 0)
1035 /* Setup the linkage between OF nodes and PHBs */
1036 pci_devs_phb_init();
1038 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
1039 * assume there is no P2P bridge on the AGP bus, which should be a
1040 * safe assumptions for now. We should do something better in the
1044 struct device_node *np = u3_agp->arch_data;
1045 PCI_DN(np)->busno = 0xf0;
1046 for (np = np->child; np; np = np->sibling)
1047 PCI_DN(np)->busno = 0xf0;
1049 /* pmac_check_ht_link(); */
1051 /* Tell pci.c to not use the common resource allocation mechanism */
1054 #else /* CONFIG_PPC64 */
1056 init_second_ohare();
1059 /* We are still having some issues with the Xserve G4, enabling
1060 * some offset between bus number and domains for now when we
1061 * assign all busses should help for now
1063 if (pci_assign_all_buses)
1064 pcibios_assign_bus_offset = 0x10;
1069 pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
1071 struct device_node* node;
1075 node = pci_device_to_OF_node(dev);
1077 /* We don't want to enable USB controllers absent from the OF tree
1078 * (iBook second controller)
1080 if (dev->vendor == PCI_VENDOR_ID_APPLE
1081 && dev->class == PCI_CLASS_SERIAL_USB_OHCI
1083 printk(KERN_INFO "Apple USB OHCI %s disabled by firmware\n",
1091 uninorth_child = node->parent &&
1092 of_device_is_compatible(node->parent, "uni-north");
1094 /* Firewire & GMAC were disabled after PCI probe, the driver is
1095 * claiming them, we must re-enable them now.
1097 if (uninorth_child && !strcmp(node->name, "firewire") &&
1098 (of_device_is_compatible(node, "pci106b,18") ||
1099 of_device_is_compatible(node, "pci106b,30") ||
1100 of_device_is_compatible(node, "pci11c1,5811"))) {
1101 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, node, 0, 1);
1102 pmac_call_feature(PMAC_FTR_1394_ENABLE, node, 0, 1);
1105 if (uninorth_child && !strcmp(node->name, "ethernet") &&
1106 of_device_is_compatible(node, "gmac")) {
1107 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, node, 0, 1);
1115 * Make sure PCI is correctly configured
1117 * We use old pci_bios versions of the function since, by
1118 * default, gmac is not powered up, and so will be absent
1119 * from the kernel initial PCI lookup.
1121 * Should be replaced by 2.4 new PCI mechanisms and really
1122 * register the device.
1124 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1125 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1126 | PCI_COMMAND_INVALIDATE;
1127 pci_write_config_word(dev, PCI_COMMAND, cmd);
1128 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 16);
1129 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
1130 L1_CACHE_BYTES >> 2);
1136 /* We power down some devices after they have been probed. They'll
1137 * be powered back on later on
1139 void __init pmac_pcibios_after_init(void)
1141 struct device_node* nd;
1143 #ifdef CONFIG_BLK_DEV_IDE
1144 struct pci_dev *dev = NULL;
1146 /* OF fails to initialize IDE controllers on macs
1147 * (and maybe other machines)
1149 * Ideally, this should be moved to the IDE layer, but we need
1150 * to check specifically with Andre Hedrick how to do it cleanly
1151 * since the common IDE code seem to care about the fact that the
1152 * BIOS may have disabled a controller.
1156 for_each_pci_dev(dev) {
1157 if ((dev->class >> 16) != PCI_BASE_CLASS_STORAGE)
1159 if (pci_enable_device(dev))
1161 "pci: Failed to enable %s\n", pci_name(dev));
1163 #endif /* CONFIG_BLK_DEV_IDE */
1165 for_each_node_by_name(nd, "firewire") {
1166 if (nd->parent && (of_device_is_compatible(nd, "pci106b,18") ||
1167 of_device_is_compatible(nd, "pci106b,30") ||
1168 of_device_is_compatible(nd, "pci11c1,5811"))
1169 && of_device_is_compatible(nd->parent, "uni-north")) {
1170 pmac_call_feature(PMAC_FTR_1394_ENABLE, nd, 0, 0);
1171 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, nd, 0, 0);
1175 for_each_node_by_name(nd, "ethernet") {
1176 if (nd->parent && of_device_is_compatible(nd, "gmac")
1177 && of_device_is_compatible(nd->parent, "uni-north"))
1178 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, nd, 0, 0);
1184 void pmac_pci_fixup_cardbus(struct pci_dev* dev)
1186 if (!machine_is(powermac))
1189 * Fix the interrupt routing on the various cardbus bridges
1190 * used on powerbooks
1192 if (dev->vendor != PCI_VENDOR_ID_TI)
1194 if (dev->device == PCI_DEVICE_ID_TI_1130 ||
1195 dev->device == PCI_DEVICE_ID_TI_1131) {
1197 /* Enable PCI interrupt */
1198 if (pci_read_config_byte(dev, 0x91, &val) == 0)
1199 pci_write_config_byte(dev, 0x91, val | 0x30);
1200 /* Disable ISA interrupt mode */
1201 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1202 pci_write_config_byte(dev, 0x92, val & ~0x06);
1204 if (dev->device == PCI_DEVICE_ID_TI_1210 ||
1205 dev->device == PCI_DEVICE_ID_TI_1211 ||
1206 dev->device == PCI_DEVICE_ID_TI_1410 ||
1207 dev->device == PCI_DEVICE_ID_TI_1510) {
1209 /* 0x8c == TI122X_IRQMUX, 2 says to route the INTA
1210 signal out the MFUNC0 pin */
1211 if (pci_read_config_byte(dev, 0x8c, &val) == 0)
1212 pci_write_config_byte(dev, 0x8c, (val & ~0x0f) | 2);
1213 /* Disable ISA interrupt mode */
1214 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1215 pci_write_config_byte(dev, 0x92, val & ~0x06);
1219 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus);
1221 void pmac_pci_fixup_pciata(struct pci_dev* dev)
1226 * On PowerMacs, we try to switch any PCI ATA controller to
1229 if (!machine_is(powermac))
1232 /* Some controllers don't have the class IDE */
1233 if (dev->vendor == PCI_VENDOR_ID_PROMISE)
1234 switch(dev->device) {
1235 case PCI_DEVICE_ID_PROMISE_20246:
1236 case PCI_DEVICE_ID_PROMISE_20262:
1237 case PCI_DEVICE_ID_PROMISE_20263:
1238 case PCI_DEVICE_ID_PROMISE_20265:
1239 case PCI_DEVICE_ID_PROMISE_20267:
1240 case PCI_DEVICE_ID_PROMISE_20268:
1241 case PCI_DEVICE_ID_PROMISE_20269:
1242 case PCI_DEVICE_ID_PROMISE_20270:
1243 case PCI_DEVICE_ID_PROMISE_20271:
1244 case PCI_DEVICE_ID_PROMISE_20275:
1245 case PCI_DEVICE_ID_PROMISE_20276:
1246 case PCI_DEVICE_ID_PROMISE_20277:
1249 /* Others, check PCI class */
1250 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
1253 pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
1254 if ((progif & 5) != 5) {
1255 printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n",
1257 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
1258 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
1260 printk(KERN_ERR "Rewrite of PROGIF failed !\n");
1263 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
1267 * Disable second function on K2-SATA, it's broken
1268 * and disable IO BARs on first one
1270 static void fixup_k2_sata(struct pci_dev* dev)
1275 if (PCI_FUNC(dev->devfn) > 0) {
1276 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1277 cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
1278 pci_write_config_word(dev, PCI_COMMAND, cmd);
1279 for (i = 0; i < 6; i++) {
1280 dev->resource[i].start = dev->resource[i].end = 0;
1281 dev->resource[i].flags = 0;
1282 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1286 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1287 cmd &= ~PCI_COMMAND_IO;
1288 pci_write_config_word(dev, PCI_COMMAND, cmd);
1289 for (i = 0; i < 5; i++) {
1290 dev->resource[i].start = dev->resource[i].end = 0;
1291 dev->resource[i].flags = 0;
1292 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1297 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, 0x0240, fixup_k2_sata);