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.
220 return PCIBIOS_SUCCESSFUL;
223 static struct pci_ops macrisc_pci_ops =
225 .read = macrisc_read_config,
226 .write = macrisc_write_config,
231 * Verify that a specific (bus, dev_fn) exists on chaos
233 static int chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
235 struct device_node *np;
236 const u32 *vendor, *device;
239 return PCIBIOS_BAD_REGISTER_NUMBER;
240 np = pci_busdev_to_OF_node(bus, devfn);
242 return PCIBIOS_DEVICE_NOT_FOUND;
244 vendor = of_get_property(np, "vendor-id", NULL);
245 device = of_get_property(np, "device-id", NULL);
246 if (vendor == NULL || device == NULL)
247 return PCIBIOS_DEVICE_NOT_FOUND;
249 if ((*vendor == 0x106b) && (*device == 3) && (offset >= 0x10)
250 && (offset != 0x14) && (offset != 0x18) && (offset <= 0x24))
251 return PCIBIOS_BAD_REGISTER_NUMBER;
253 return PCIBIOS_SUCCESSFUL;
257 chaos_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
260 int result = chaos_validate_dev(bus, devfn, offset);
261 if (result == PCIBIOS_BAD_REGISTER_NUMBER)
263 if (result != PCIBIOS_SUCCESSFUL)
265 return macrisc_read_config(bus, devfn, offset, len, val);
269 chaos_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
272 int result = chaos_validate_dev(bus, devfn, offset);
273 if (result != PCIBIOS_SUCCESSFUL)
275 return macrisc_write_config(bus, devfn, offset, len, val);
278 static struct pci_ops chaos_pci_ops =
280 .read = chaos_read_config,
281 .write = chaos_write_config,
284 static void __init setup_chaos(struct pci_controller *hose,
285 struct resource *addr)
287 /* assume a `chaos' bridge */
288 hose->ops = &chaos_pci_ops;
289 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
290 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
292 #endif /* CONFIG_PPC32 */
296 * These versions of U3 HyperTransport config space access ops do not
297 * implement self-view of the HT host yet
301 * This function deals with some "special cases" devices.
303 * 0 -> No special case
304 * 1 -> Skip the device but act as if the access was successfull
305 * (return 0xff's on reads, eventually, cache config space
306 * accesses in a later version)
307 * -1 -> Hide the device (unsuccessful acess)
309 static int u3_ht_skip_device(struct pci_controller *hose,
310 struct pci_bus *bus, unsigned int devfn)
312 struct device_node *busdn, *dn;
315 /* We only allow config cycles to devices that are in OF device-tree
316 * as we are apparently having some weird things going on with some
317 * revs of K2 on recent G5s
320 busdn = pci_device_to_OF_node(bus->self);
322 busdn = hose->arch_data;
323 for (dn = busdn->child; dn; dn = dn->sibling)
324 if (PCI_DN(dn) && PCI_DN(dn)->devfn == devfn)
330 * When a device in K2 is powered down, we die on config
331 * cycle accesses. Fix that here.
334 if (k2_skiplist[i] == dn)
340 #define U3_HT_CFA0(devfn, off) \
341 ((((unsigned int)devfn) << 8) | offset)
342 #define U3_HT_CFA1(bus, devfn, off) \
343 (U3_HT_CFA0(devfn, off) \
344 + (((unsigned int)bus) << 16) \
347 static volatile void __iomem *u3_ht_cfg_access(struct pci_controller* hose,
348 u8 bus, u8 devfn, u8 offset)
350 if (bus == hose->first_busno) {
351 /* For now, we don't self probe U3 HT bridge */
352 if (PCI_SLOT(devfn) == 0)
354 return hose->cfg_data + U3_HT_CFA0(devfn, offset);
356 return hose->cfg_data + U3_HT_CFA1(bus, devfn, offset);
359 static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
360 int offset, int len, u32 *val)
362 struct pci_controller *hose;
363 volatile void __iomem *addr;
365 hose = pci_bus_to_host(bus);
367 return PCIBIOS_DEVICE_NOT_FOUND;
369 return PCIBIOS_BAD_REGISTER_NUMBER;
370 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
372 return PCIBIOS_DEVICE_NOT_FOUND;
374 switch (u3_ht_skip_device(hose, bus, devfn)) {
382 *val = 0xffff; break;
384 *val = 0xfffffffful; break;
386 return PCIBIOS_SUCCESSFUL;
388 return PCIBIOS_DEVICE_NOT_FOUND;
392 * Note: the caller has already checked that offset is
393 * suitably aligned and that len is 1, 2 or 4.
400 *val = in_le16(addr);
403 *val = in_le32(addr);
406 return PCIBIOS_SUCCESSFUL;
409 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
410 int offset, int len, u32 val)
412 struct pci_controller *hose;
413 volatile void __iomem *addr;
415 hose = pci_bus_to_host(bus);
417 return PCIBIOS_DEVICE_NOT_FOUND;
419 return PCIBIOS_BAD_REGISTER_NUMBER;
420 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
422 return PCIBIOS_DEVICE_NOT_FOUND;
424 switch (u3_ht_skip_device(hose, bus, devfn)) {
428 return PCIBIOS_SUCCESSFUL;
430 return PCIBIOS_DEVICE_NOT_FOUND;
434 * Note: the caller has already checked that offset is
435 * suitably aligned and that len is 1, 2 or 4.
445 out_le32((u32 __iomem *)addr, val);
448 return PCIBIOS_SUCCESSFUL;
451 static struct pci_ops u3_ht_pci_ops =
453 .read = u3_ht_read_config,
454 .write = u3_ht_write_config,
457 #define U4_PCIE_CFA0(devfn, off) \
458 ((1 << ((unsigned int)PCI_SLOT(dev_fn))) \
459 | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
460 | ((((unsigned int)(off)) >> 8) << 28) \
461 | (((unsigned int)(off)) & 0xfcU))
463 #define U4_PCIE_CFA1(bus, devfn, off) \
464 ((((unsigned int)(bus)) << 16) \
465 |(((unsigned int)(devfn)) << 8) \
466 | ((((unsigned int)(off)) >> 8) << 28) \
467 |(((unsigned int)(off)) & 0xfcU) \
470 static volatile void __iomem *u4_pcie_cfg_access(struct pci_controller* hose,
471 u8 bus, u8 dev_fn, int offset)
475 if (bus == hose->first_busno) {
476 caddr = U4_PCIE_CFA0(dev_fn, offset);
478 caddr = U4_PCIE_CFA1(bus, dev_fn, offset);
480 /* Uninorth will return garbage if we don't read back the value ! */
482 out_le32(hose->cfg_addr, caddr);
483 } while (in_le32(hose->cfg_addr) != caddr);
486 return hose->cfg_data + offset;
489 static int u4_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
490 int offset, int len, u32 *val)
492 struct pci_controller *hose;
493 volatile void __iomem *addr;
495 hose = pci_bus_to_host(bus);
497 return PCIBIOS_DEVICE_NOT_FOUND;
498 if (offset >= 0x1000)
499 return PCIBIOS_BAD_REGISTER_NUMBER;
500 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
502 return PCIBIOS_DEVICE_NOT_FOUND;
504 * Note: the caller has already checked that offset is
505 * suitably aligned and that len is 1, 2 or 4.
512 *val = in_le16(addr);
515 *val = in_le32(addr);
518 return PCIBIOS_SUCCESSFUL;
521 static int u4_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
522 int offset, int len, u32 val)
524 struct pci_controller *hose;
525 volatile void __iomem *addr;
527 hose = pci_bus_to_host(bus);
529 return PCIBIOS_DEVICE_NOT_FOUND;
530 if (offset >= 0x1000)
531 return PCIBIOS_BAD_REGISTER_NUMBER;
532 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
534 return PCIBIOS_DEVICE_NOT_FOUND;
536 * Note: the caller has already checked that offset is
537 * suitably aligned and that len is 1, 2 or 4.
550 return PCIBIOS_SUCCESSFUL;
553 static struct pci_ops u4_pcie_pci_ops =
555 .read = u4_pcie_read_config,
556 .write = u4_pcie_write_config,
559 #endif /* CONFIG_PPC64 */
563 * For a bandit bridge, turn on cache coherency if necessary.
564 * N.B. we could clean this up using the hose ops directly.
566 static void __init init_bandit(struct pci_controller *bp)
568 unsigned int vendev, magic;
571 /* read the word at offset 0 in config space for device 11 */
572 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_VENDOR_ID);
574 vendev = in_le32(bp->cfg_data);
575 if (vendev == (PCI_DEVICE_ID_APPLE_BANDIT << 16) +
576 PCI_VENDOR_ID_APPLE) {
577 /* read the revision id */
578 out_le32(bp->cfg_addr,
579 (1UL << BANDIT_DEVNUM) + PCI_REVISION_ID);
581 rev = in_8(bp->cfg_data);
582 if (rev != BANDIT_REVID)
584 "Unknown revision %d for bandit\n", rev);
585 } else if (vendev != (BANDIT_DEVID_2 << 16) + PCI_VENDOR_ID_APPLE) {
586 printk(KERN_WARNING "bandit isn't? (%x)\n", vendev);
590 /* read the word at offset 0x50 */
591 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + BANDIT_MAGIC);
593 magic = in_le32(bp->cfg_data);
594 if ((magic & BANDIT_COHERENT) != 0)
596 magic |= BANDIT_COHERENT;
598 out_le32(bp->cfg_data, magic);
599 printk(KERN_INFO "Cache coherency enabled for bandit/PSX\n");
603 * Tweak the PCI-PCI bridge chip on the blue & white G3s.
605 static void __init init_p2pbridge(void)
607 struct device_node *p2pbridge;
608 struct pci_controller* hose;
612 /* XXX it would be better here to identify the specific
613 PCI-PCI bridge chip we have. */
614 p2pbridge = of_find_node_by_name(NULL, "pci-bridge");
615 if (p2pbridge == NULL
616 || p2pbridge->parent == NULL
617 || strcmp(p2pbridge->parent->name, "pci") != 0)
619 if (pci_device_from_OF_node(p2pbridge, &bus, &devfn) < 0) {
620 DBG("Can't find PCI infos for PCI<->PCI bridge\n");
623 /* Warning: At this point, we have not yet renumbered all busses.
624 * So we must use OF walking to find out hose
626 hose = pci_find_hose_for_OF_device(p2pbridge);
628 DBG("Can't find hose for PCI<->PCI bridge\n");
631 if (early_read_config_word(hose, bus, devfn,
632 PCI_BRIDGE_CONTROL, &val) < 0) {
633 printk(KERN_ERR "init_p2pbridge: couldn't read bridge"
637 val &= ~PCI_BRIDGE_CTL_MASTER_ABORT;
638 early_write_config_word(hose, bus, devfn, PCI_BRIDGE_CONTROL, val);
640 of_node_put(p2pbridge);
643 static void __init init_second_ohare(void)
645 struct device_node *np = of_find_node_by_name(NULL, "pci106b,7");
646 unsigned char bus, devfn;
652 /* This must run before we initialize the PICs since the second
653 * ohare hosts a PIC that will be accessed there.
655 if (pci_device_from_OF_node(np, &bus, &devfn) == 0) {
656 struct pci_controller* hose =
657 pci_find_hose_for_OF_device(np);
659 printk(KERN_ERR "Can't find PCI hose for OHare2 !\n");
662 early_read_config_word(hose, bus, devfn, PCI_COMMAND, &cmd);
663 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
664 cmd &= ~PCI_COMMAND_IO;
665 early_write_config_word(hose, bus, devfn, PCI_COMMAND, cmd);
667 has_second_ohare = 1;
671 * Some Apple desktop machines have a NEC PD720100A USB2 controller
672 * on the motherboard. Open Firmware, on these, will disable the
673 * EHCI part of it so it behaves like a pair of OHCI's. This fixup
674 * code re-enables it ;)
676 static void __init fixup_nec_usb2(void)
678 struct device_node *nec;
680 for (nec = NULL; (nec = of_find_node_by_name(nec, "usb")) != NULL;) {
681 struct pci_controller *hose;
686 prop = of_get_property(nec, "vendor-id", NULL);
691 prop = of_get_property(nec, "device-id", NULL);
696 prop = of_get_property(nec, "reg", NULL);
699 devfn = (prop[0] >> 8) & 0xff;
700 bus = (prop[0] >> 16) & 0xff;
701 if (PCI_FUNC(devfn) != 0)
703 hose = pci_find_hose_for_OF_device(nec);
706 early_read_config_dword(hose, bus, devfn, 0xe4, &data);
708 printk("Found NEC PD720100A USB2 chip with disabled"
709 " EHCI, fixing up...\n");
711 early_write_config_dword(hose, bus, devfn, 0xe4, data);
716 static void __init setup_bandit(struct pci_controller *hose,
717 struct resource *addr)
719 hose->ops = ¯isc_pci_ops;
720 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
721 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
725 static int __init setup_uninorth(struct pci_controller *hose,
726 struct resource *addr)
728 pci_assign_all_buses = 1;
730 hose->ops = ¯isc_pci_ops;
731 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
732 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
733 /* We "know" that the bridge at f2000000 has the PCI slots. */
734 return addr->start == 0xf2000000;
736 #endif /* CONFIG_PPC32 */
739 static void __init setup_u3_agp(struct pci_controller* hose)
741 /* On G5, we move AGP up to high bus number so we don't need
742 * to reassign bus numbers for HT. If we ever have P2P bridges
743 * on AGP, we'll have to move pci_assign_all_busses to the
744 * pci_controller structure so we enable it for AGP and not for
746 * We hard code the address because of the different size of
747 * the reg address cell, we shall fix that by killing struct
748 * reg_property and using some accessor functions instead
750 hose->first_busno = 0xf0;
751 hose->last_busno = 0xff;
753 hose->ops = ¯isc_pci_ops;
754 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
755 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
759 static void __init setup_u4_pcie(struct pci_controller* hose)
761 /* We currently only implement the "non-atomic" config space, to
762 * be optimised later.
764 hose->ops = &u4_pcie_pci_ops;
765 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
766 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
768 /* The bus contains a bridge from root -> device, we need to
769 * make it visible on bus 0 so that we pick the right type
770 * of config cycles. If we didn't, we would have to force all
771 * config cycles to be type 1. So we override the "bus-range"
774 hose->first_busno = 0x00;
775 hose->last_busno = 0xff;
779 static void __init setup_u3_ht(struct pci_controller* hose)
781 struct device_node *np = (struct device_node *)hose->arch_data;
782 struct pci_controller *other = NULL;
786 hose->ops = &u3_ht_pci_ops;
788 /* We hard code the address because of the different size of
789 * the reg address cell, we shall fix that by killing struct
790 * reg_property and using some accessor functions instead
792 hose->cfg_data = ioremap(0xf2000000, 0x02000000);
795 * /ht node doesn't expose a "ranges" property, so we "remove"
796 * regions that have been allocated to AGP. So far, this version of
797 * the code doesn't assign any of the 0xfxxxxxxx "fine" memory regions
798 * to /ht. We need to fix that sooner or later by either parsing all
799 * child "ranges" properties or figuring out the U3 address space
800 * decoding logic and then read its configuration register (if any).
802 hose->io_base_phys = 0xf4000000;
803 hose->pci_io_size = 0x00400000;
804 hose->io_resource.name = np->full_name;
805 hose->io_resource.start = 0;
806 hose->io_resource.end = 0x003fffff;
807 hose->io_resource.flags = IORESOURCE_IO;
808 hose->pci_mem_offset = 0;
809 hose->first_busno = 0;
810 hose->last_busno = 0xef;
811 hose->mem_resources[0].name = np->full_name;
812 hose->mem_resources[0].start = 0x80000000;
813 hose->mem_resources[0].end = 0xefffffff;
814 hose->mem_resources[0].flags = IORESOURCE_MEM;
820 else if (u4_pcie != NULL)
824 DBG("U3/4 has no AGP/PCIE, using full resource range\n");
828 /* Fixup bus range vs. PCIE */
830 hose->last_busno = u4_pcie->first_busno - 1;
832 /* We "remove" the AGP resources from the resources allocated to HT,
833 * that is we create "holes". However, that code does assumptions
834 * that so far happen to be true (cross fingers...), typically that
835 * resources in the AGP node are properly ordered
838 for (i=0; i<3; i++) {
839 struct resource *res = &other->mem_resources[i];
840 if (res->flags != IORESOURCE_MEM)
842 /* We don't care about "fine" resources */
843 if (res->start >= 0xf0000000)
845 /* Check if it's just a matter of "shrinking" us in one
848 if (hose->mem_resources[cur].start == res->start) {
849 DBG("U3/HT: shrink start of %d, %08lx -> %08lx\n",
850 cur, hose->mem_resources[cur].start,
852 hose->mem_resources[cur].start = res->end + 1;
855 if (hose->mem_resources[cur].end == res->end) {
856 DBG("U3/HT: shrink end of %d, %08lx -> %08lx\n",
857 cur, hose->mem_resources[cur].end,
859 hose->mem_resources[cur].end = res->start - 1;
862 /* No, it's not the case, we need a hole */
864 /* not enough resources for a hole, we drop part
867 printk(KERN_WARNING "Running out of resources"
868 " for /ht host !\n");
869 hose->mem_resources[cur].end = res->start - 1;
873 DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
874 cur-1, res->start - 1, cur, res->end + 1);
875 hose->mem_resources[cur].name = np->full_name;
876 hose->mem_resources[cur].flags = IORESOURCE_MEM;
877 hose->mem_resources[cur].start = res->end + 1;
878 hose->mem_resources[cur].end = hose->mem_resources[cur-1].end;
879 hose->mem_resources[cur-1].end = res->start - 1;
882 #endif /* CONFIG_PPC64 */
885 * We assume that if we have a G3 powermac, we have one bridge called
886 * "pci" (a MPC106) and no bandit or chaos bridges, and contrariwise,
887 * if we have one or more bandit or chaos bridges, we don't have a MPC106.
889 static int __init pmac_add_bridge(struct device_node *dev)
892 struct pci_controller *hose;
893 struct resource rsrc;
895 const int *bus_range;
896 int primary = 1, has_address = 0;
898 DBG("Adding PCI host bridge %s\n", dev->full_name);
900 /* Fetch host bridge registers address */
901 has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
903 /* Get bus range if any */
904 bus_range = of_get_property(dev, "bus-range", &len);
905 if (bus_range == NULL || len < 2 * sizeof(int)) {
906 printk(KERN_WARNING "Can't get bus-range for %s, assume"
907 " bus 0\n", dev->full_name);
910 hose = pcibios_alloc_controller(dev);
913 hose->first_busno = bus_range ? bus_range[0] : 0;
914 hose->last_busno = bus_range ? bus_range[1] : 0xff;
918 /* 64 bits only bridges */
920 if (of_device_is_compatible(dev, "u3-agp")) {
922 disp_name = "U3-AGP";
924 } else if (of_device_is_compatible(dev, "u3-ht")) {
928 } else if (of_device_is_compatible(dev, "u4-pcie")) {
930 disp_name = "U4-PCIE";
933 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number:"
934 " %d->%d\n", disp_name, hose->first_busno, hose->last_busno);
935 #endif /* CONFIG_PPC64 */
937 /* 32 bits only bridges */
939 if (of_device_is_compatible(dev, "uni-north")) {
940 primary = setup_uninorth(hose, &rsrc);
941 disp_name = "UniNorth";
942 } else if (strcmp(dev->name, "pci") == 0) {
943 /* XXX assume this is a mpc106 (grackle) */
945 disp_name = "Grackle (MPC106)";
946 } else if (strcmp(dev->name, "bandit") == 0) {
947 setup_bandit(hose, &rsrc);
948 disp_name = "Bandit";
949 } else if (strcmp(dev->name, "chaos") == 0) {
950 setup_chaos(hose, &rsrc);
954 printk(KERN_INFO "Found %s PCI host bridge at 0x%016llx. "
955 "Firmware bus number: %d->%d\n",
956 disp_name, (unsigned long long)rsrc.start, hose->first_busno,
958 #endif /* CONFIG_PPC32 */
960 DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
961 hose, hose->cfg_addr, hose->cfg_data);
963 /* Interpret the "ranges" property */
964 /* This also maps the I/O region and sets isa_io/mem_base */
965 pci_process_bridge_OF_ranges(hose, dev, primary);
967 /* Fixup "bus-range" OF property */
968 fixup_bus_range(dev);
973 void __devinit pmac_pci_irq_fixup(struct pci_dev *dev)
976 /* Fixup interrupt for the modem/ethernet combo controller.
977 * on machines with a second ohare chip.
978 * The number in the device tree (27) is bogus (correct for
979 * the ethernet-only board but not the combo ethernet/modem
980 * board). The real interrupt is 28 on the second controller
983 if (has_second_ohare &&
984 dev->vendor == PCI_VENDOR_ID_DEC &&
985 dev->device == PCI_DEVICE_ID_DEC_TULIP_PLUS) {
986 dev->irq = irq_create_mapping(NULL, 60);
987 set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
989 #endif /* CONFIG_PPC32 */
992 void __init pmac_pci_init(void)
994 struct device_node *np, *root;
995 struct device_node *ht = NULL;
997 root = of_find_node_by_path("/");
999 printk(KERN_CRIT "pmac_pci_init: can't find root "
1000 "of device tree\n");
1003 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
1004 if (np->name == NULL)
1006 if (strcmp(np->name, "bandit") == 0
1007 || strcmp(np->name, "chaos") == 0
1008 || strcmp(np->name, "pci") == 0) {
1009 if (pmac_add_bridge(np) == 0)
1012 if (strcmp(np->name, "ht") == 0) {
1020 /* Probe HT last as it relies on the agp resources to be already
1023 if (ht && pmac_add_bridge(ht) != 0)
1026 /* Setup the linkage between OF nodes and PHBs */
1027 pci_devs_phb_init();
1029 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
1030 * assume there is no P2P bridge on the AGP bus, which should be a
1031 * safe assumptions for now. We should do something better in the
1035 struct device_node *np = u3_agp->arch_data;
1036 PCI_DN(np)->busno = 0xf0;
1037 for (np = np->child; np; np = np->sibling)
1038 PCI_DN(np)->busno = 0xf0;
1040 /* pmac_check_ht_link(); */
1042 /* Tell pci.c to not use the common resource allocation mechanism */
1045 #else /* CONFIG_PPC64 */
1047 init_second_ohare();
1050 /* We are still having some issues with the Xserve G4, enabling
1051 * some offset between bus number and domains for now when we
1052 * assign all busses should help for now
1054 if (pci_assign_all_buses)
1055 pcibios_assign_bus_offset = 0x10;
1060 pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
1062 struct device_node* node;
1066 node = pci_device_to_OF_node(dev);
1068 /* We don't want to enable USB controllers absent from the OF tree
1069 * (iBook second controller)
1071 if (dev->vendor == PCI_VENDOR_ID_APPLE
1072 && dev->class == PCI_CLASS_SERIAL_USB_OHCI
1074 printk(KERN_INFO "Apple USB OHCI %s disabled by firmware\n",
1082 uninorth_child = node->parent &&
1083 of_device_is_compatible(node->parent, "uni-north");
1085 /* Firewire & GMAC were disabled after PCI probe, the driver is
1086 * claiming them, we must re-enable them now.
1088 if (uninorth_child && !strcmp(node->name, "firewire") &&
1089 (of_device_is_compatible(node, "pci106b,18") ||
1090 of_device_is_compatible(node, "pci106b,30") ||
1091 of_device_is_compatible(node, "pci11c1,5811"))) {
1092 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, node, 0, 1);
1093 pmac_call_feature(PMAC_FTR_1394_ENABLE, node, 0, 1);
1096 if (uninorth_child && !strcmp(node->name, "ethernet") &&
1097 of_device_is_compatible(node, "gmac")) {
1098 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, node, 0, 1);
1106 * Make sure PCI is correctly configured
1108 * We use old pci_bios versions of the function since, by
1109 * default, gmac is not powered up, and so will be absent
1110 * from the kernel initial PCI lookup.
1112 * Should be replaced by 2.4 new PCI mechanisms and really
1113 * register the device.
1115 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1116 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1117 | PCI_COMMAND_INVALIDATE;
1118 pci_write_config_word(dev, PCI_COMMAND, cmd);
1119 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 16);
1120 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
1121 L1_CACHE_BYTES >> 2);
1127 /* We power down some devices after they have been probed. They'll
1128 * be powered back on later on
1130 void __init pmac_pcibios_after_init(void)
1132 struct device_node* nd;
1134 #ifdef CONFIG_BLK_DEV_IDE
1135 struct pci_dev *dev = NULL;
1137 /* OF fails to initialize IDE controllers on macs
1138 * (and maybe other machines)
1140 * Ideally, this should be moved to the IDE layer, but we need
1141 * to check specifically with Andre Hedrick how to do it cleanly
1142 * since the common IDE code seem to care about the fact that the
1143 * BIOS may have disabled a controller.
1147 for_each_pci_dev(dev) {
1148 if ((dev->class >> 16) != PCI_BASE_CLASS_STORAGE)
1150 if (pci_enable_device(dev))
1152 "pci: Failed to enable %s\n", pci_name(dev));
1154 #endif /* CONFIG_BLK_DEV_IDE */
1156 for_each_node_by_name(nd, "firewire") {
1157 if (nd->parent && (of_device_is_compatible(nd, "pci106b,18") ||
1158 of_device_is_compatible(nd, "pci106b,30") ||
1159 of_device_is_compatible(nd, "pci11c1,5811"))
1160 && of_device_is_compatible(nd->parent, "uni-north")) {
1161 pmac_call_feature(PMAC_FTR_1394_ENABLE, nd, 0, 0);
1162 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, nd, 0, 0);
1166 for_each_node_by_name(nd, "ethernet") {
1167 if (nd->parent && of_device_is_compatible(nd, "gmac")
1168 && of_device_is_compatible(nd->parent, "uni-north"))
1169 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, nd, 0, 0);
1175 void pmac_pci_fixup_cardbus(struct pci_dev* dev)
1177 if (!machine_is(powermac))
1180 * Fix the interrupt routing on the various cardbus bridges
1181 * used on powerbooks
1183 if (dev->vendor != PCI_VENDOR_ID_TI)
1185 if (dev->device == PCI_DEVICE_ID_TI_1130 ||
1186 dev->device == PCI_DEVICE_ID_TI_1131) {
1188 /* Enable PCI interrupt */
1189 if (pci_read_config_byte(dev, 0x91, &val) == 0)
1190 pci_write_config_byte(dev, 0x91, val | 0x30);
1191 /* Disable ISA interrupt mode */
1192 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1193 pci_write_config_byte(dev, 0x92, val & ~0x06);
1195 if (dev->device == PCI_DEVICE_ID_TI_1210 ||
1196 dev->device == PCI_DEVICE_ID_TI_1211 ||
1197 dev->device == PCI_DEVICE_ID_TI_1410 ||
1198 dev->device == PCI_DEVICE_ID_TI_1510) {
1200 /* 0x8c == TI122X_IRQMUX, 2 says to route the INTA
1201 signal out the MFUNC0 pin */
1202 if (pci_read_config_byte(dev, 0x8c, &val) == 0)
1203 pci_write_config_byte(dev, 0x8c, (val & ~0x0f) | 2);
1204 /* Disable ISA interrupt mode */
1205 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1206 pci_write_config_byte(dev, 0x92, val & ~0x06);
1210 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus);
1212 void pmac_pci_fixup_pciata(struct pci_dev* dev)
1217 * On PowerMacs, we try to switch any PCI ATA controller to
1220 if (!machine_is(powermac))
1223 /* Some controllers don't have the class IDE */
1224 if (dev->vendor == PCI_VENDOR_ID_PROMISE)
1225 switch(dev->device) {
1226 case PCI_DEVICE_ID_PROMISE_20246:
1227 case PCI_DEVICE_ID_PROMISE_20262:
1228 case PCI_DEVICE_ID_PROMISE_20263:
1229 case PCI_DEVICE_ID_PROMISE_20265:
1230 case PCI_DEVICE_ID_PROMISE_20267:
1231 case PCI_DEVICE_ID_PROMISE_20268:
1232 case PCI_DEVICE_ID_PROMISE_20269:
1233 case PCI_DEVICE_ID_PROMISE_20270:
1234 case PCI_DEVICE_ID_PROMISE_20271:
1235 case PCI_DEVICE_ID_PROMISE_20275:
1236 case PCI_DEVICE_ID_PROMISE_20276:
1237 case PCI_DEVICE_ID_PROMISE_20277:
1240 /* Others, check PCI class */
1241 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
1244 pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
1245 if ((progif & 5) != 5) {
1246 printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n",
1248 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
1249 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
1251 printk(KERN_ERR "Rewrite of PROGIF failed !\n");
1254 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
1258 * Disable second function on K2-SATA, it's broken
1259 * and disable IO BARs on first one
1261 static void fixup_k2_sata(struct pci_dev* dev)
1266 if (PCI_FUNC(dev->devfn) > 0) {
1267 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1268 cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
1269 pci_write_config_word(dev, PCI_COMMAND, cmd);
1270 for (i = 0; i < 6; i++) {
1271 dev->resource[i].start = dev->resource[i].end = 0;
1272 dev->resource[i].flags = 0;
1273 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1277 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1278 cmd &= ~PCI_COMMAND_IO;
1279 pci_write_config_word(dev, PCI_COMMAND, cmd);
1280 for (i = 0; i < 5; i++) {
1281 dev->resource[i].start = dev->resource[i].end = 0;
1282 dev->resource[i].flags = 0;
1283 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1288 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, 0x0240, fixup_k2_sata);