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 static int add_bridge(struct device_node *dev);
40 /* XXX Could be per-controller, but I don't think we risk anything by
41 * assuming we won't have both UniNorth and Bandit */
42 static int has_uninorth;
44 static struct pci_controller *u3_agp;
45 static struct pci_controller *u4_pcie;
46 static struct pci_controller *u3_ht;
48 static int has_second_ohare;
49 #endif /* CONFIG_PPC64 */
51 extern int pcibios_assign_bus_offset;
53 struct device_node *k2_skiplist[2];
56 * Magic constants for enabling cache coherency in the bandit/PSX bridge.
58 #define BANDIT_DEVID_2 8
59 #define BANDIT_REVID 3
61 #define BANDIT_DEVNUM 11
62 #define BANDIT_MAGIC 0x50
63 #define BANDIT_COHERENT 0x40
65 static int __init fixup_one_level_bus_range(struct device_node *node, int higher)
67 for (; node != 0;node = node->sibling) {
68 const int * bus_range;
69 const unsigned int *class_code;
72 /* For PCI<->PCI bridges or CardBus bridges, we go down */
73 class_code = get_property(node, "class-code", NULL);
74 if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
75 (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
77 bus_range = get_property(node, "bus-range", &len);
78 if (bus_range != NULL && len > 2 * sizeof(int)) {
79 if (bus_range[1] > higher)
80 higher = bus_range[1];
82 higher = fixup_one_level_bus_range(node->child, higher);
87 /* This routine fixes the "bus-range" property of all bridges in the
88 * system since they tend to have their "last" member wrong on macs
90 * Note that the bus numbers manipulated here are OF bus numbers, they
91 * are not Linux bus numbers.
93 static void __init fixup_bus_range(struct device_node *bridge)
96 struct property *prop;
98 /* Lookup the "bus-range" property for the hose */
99 prop = of_find_property(bridge, "bus-range", &len);
100 if (prop == NULL || prop->length < 2 * sizeof(int))
103 bus_range = (int *)prop->value;
104 bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
108 * Apple MacRISC (U3, UniNorth, Bandit, Chaos) PCI controllers.
110 * The "Bandit" version is present in all early PCI PowerMacs,
111 * and up to the first ones using Grackle. Some machines may
112 * have 2 bandit controllers (2 PCI busses).
114 * "Chaos" is used in some "Bandit"-type machines as a bridge
115 * for the separate display bus. It is accessed the same
116 * way as bandit, but cannot be probed for devices. It therefore
117 * has its own config access functions.
119 * The "UniNorth" version is present in all Core99 machines
120 * (iBook, G4, new IMacs, and all the recent Apple machines).
121 * It contains 3 controllers in one ASIC.
123 * The U3 is the bridge used on G5 machines. It contains an
124 * AGP bus which is dealt with the old UniNorth access routines
125 * and a HyperTransport bus which uses its own set of access
129 #define MACRISC_CFA0(devfn, off) \
130 ((1 << (unsigned int)PCI_SLOT(dev_fn)) \
131 | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
132 | (((unsigned int)(off)) & 0xFCUL))
134 #define MACRISC_CFA1(bus, devfn, off) \
135 ((((unsigned int)(bus)) << 16) \
136 |(((unsigned int)(devfn)) << 8) \
137 |(((unsigned int)(off)) & 0xFCUL) \
140 static volatile void __iomem *macrisc_cfg_access(struct pci_controller* hose,
141 u8 bus, u8 dev_fn, u8 offset)
145 if (bus == hose->first_busno) {
146 if (dev_fn < (11 << 3))
148 caddr = MACRISC_CFA0(dev_fn, offset);
150 caddr = MACRISC_CFA1(bus, dev_fn, offset);
152 /* Uninorth will return garbage if we don't read back the value ! */
154 out_le32(hose->cfg_addr, caddr);
155 } while (in_le32(hose->cfg_addr) != caddr);
157 offset &= has_uninorth ? 0x07 : 0x03;
158 return hose->cfg_data + offset;
161 static int macrisc_read_config(struct pci_bus *bus, unsigned int devfn,
162 int offset, int len, u32 *val)
164 struct pci_controller *hose;
165 volatile void __iomem *addr;
167 hose = pci_bus_to_host(bus);
169 return PCIBIOS_DEVICE_NOT_FOUND;
171 return PCIBIOS_BAD_REGISTER_NUMBER;
172 addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
174 return PCIBIOS_DEVICE_NOT_FOUND;
176 * Note: the caller has already checked that offset is
177 * suitably aligned and that len is 1, 2 or 4.
184 *val = in_le16(addr);
187 *val = in_le32(addr);
190 return PCIBIOS_SUCCESSFUL;
193 static int macrisc_write_config(struct pci_bus *bus, unsigned int devfn,
194 int offset, int len, u32 val)
196 struct pci_controller *hose;
197 volatile void __iomem *addr;
199 hose = pci_bus_to_host(bus);
201 return PCIBIOS_DEVICE_NOT_FOUND;
203 return PCIBIOS_BAD_REGISTER_NUMBER;
204 addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
206 return PCIBIOS_DEVICE_NOT_FOUND;
208 * Note: the caller has already checked that offset is
209 * suitably aligned and that len is 1, 2 or 4.
218 (void) in_le16(addr);
222 (void) in_le32(addr);
225 return PCIBIOS_SUCCESSFUL;
228 static struct pci_ops macrisc_pci_ops =
236 * Verify that a specific (bus, dev_fn) exists on chaos
238 static int chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
240 struct device_node *np;
241 const u32 *vendor, *device;
244 return PCIBIOS_BAD_REGISTER_NUMBER;
245 np = pci_busdev_to_OF_node(bus, devfn);
247 return PCIBIOS_DEVICE_NOT_FOUND;
249 vendor = get_property(np, "vendor-id", NULL);
250 device = get_property(np, "device-id", NULL);
251 if (vendor == NULL || device == NULL)
252 return PCIBIOS_DEVICE_NOT_FOUND;
254 if ((*vendor == 0x106b) && (*device == 3) && (offset >= 0x10)
255 && (offset != 0x14) && (offset != 0x18) && (offset <= 0x24))
256 return PCIBIOS_BAD_REGISTER_NUMBER;
258 return PCIBIOS_SUCCESSFUL;
262 chaos_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
265 int result = chaos_validate_dev(bus, devfn, offset);
266 if (result == PCIBIOS_BAD_REGISTER_NUMBER)
268 if (result != PCIBIOS_SUCCESSFUL)
270 return macrisc_read_config(bus, devfn, offset, len, val);
274 chaos_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
277 int result = chaos_validate_dev(bus, devfn, offset);
278 if (result != PCIBIOS_SUCCESSFUL)
280 return macrisc_write_config(bus, devfn, offset, len, val);
283 static struct pci_ops chaos_pci_ops =
289 static void __init setup_chaos(struct pci_controller *hose,
290 struct resource *addr)
292 /* assume a `chaos' bridge */
293 hose->ops = &chaos_pci_ops;
294 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
295 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
297 #endif /* CONFIG_PPC32 */
301 * These versions of U3 HyperTransport config space access ops do not
302 * implement self-view of the HT host yet
306 * This function deals with some "special cases" devices.
308 * 0 -> No special case
309 * 1 -> Skip the device but act as if the access was successfull
310 * (return 0xff's on reads, eventually, cache config space
311 * accesses in a later version)
312 * -1 -> Hide the device (unsuccessful acess)
314 static int u3_ht_skip_device(struct pci_controller *hose,
315 struct pci_bus *bus, unsigned int devfn)
317 struct device_node *busdn, *dn;
320 /* We only allow config cycles to devices that are in OF device-tree
321 * as we are apparently having some weird things going on with some
322 * revs of K2 on recent G5s
325 busdn = pci_device_to_OF_node(bus->self);
327 busdn = hose->arch_data;
328 for (dn = busdn->child; dn; dn = dn->sibling)
329 if (PCI_DN(dn) && PCI_DN(dn)->devfn == devfn)
335 * When a device in K2 is powered down, we die on config
336 * cycle accesses. Fix that here.
339 if (k2_skiplist[i] == dn)
345 #define U3_HT_CFA0(devfn, off) \
346 ((((unsigned int)devfn) << 8) | offset)
347 #define U3_HT_CFA1(bus, devfn, off) \
348 (U3_HT_CFA0(devfn, off) \
349 + (((unsigned int)bus) << 16) \
352 static volatile void __iomem *u3_ht_cfg_access(struct pci_controller* hose,
353 u8 bus, u8 devfn, u8 offset)
355 if (bus == hose->first_busno) {
356 /* For now, we don't self probe U3 HT bridge */
357 if (PCI_SLOT(devfn) == 0)
359 return hose->cfg_data + U3_HT_CFA0(devfn, offset);
361 return hose->cfg_data + U3_HT_CFA1(bus, devfn, offset);
364 static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
365 int offset, int len, u32 *val)
367 struct pci_controller *hose;
368 volatile void __iomem *addr;
370 hose = pci_bus_to_host(bus);
372 return PCIBIOS_DEVICE_NOT_FOUND;
374 return PCIBIOS_BAD_REGISTER_NUMBER;
375 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
377 return PCIBIOS_DEVICE_NOT_FOUND;
379 switch (u3_ht_skip_device(hose, bus, devfn)) {
387 *val = 0xffff; break;
389 *val = 0xfffffffful; break;
391 return PCIBIOS_SUCCESSFUL;
393 return PCIBIOS_DEVICE_NOT_FOUND;
397 * Note: the caller has already checked that offset is
398 * suitably aligned and that len is 1, 2 or 4.
405 *val = in_le16(addr);
408 *val = in_le32(addr);
411 return PCIBIOS_SUCCESSFUL;
414 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
415 int offset, int len, u32 val)
417 struct pci_controller *hose;
418 volatile void __iomem *addr;
420 hose = pci_bus_to_host(bus);
422 return PCIBIOS_DEVICE_NOT_FOUND;
424 return PCIBIOS_BAD_REGISTER_NUMBER;
425 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
427 return PCIBIOS_DEVICE_NOT_FOUND;
429 switch (u3_ht_skip_device(hose, bus, devfn)) {
433 return PCIBIOS_SUCCESSFUL;
435 return PCIBIOS_DEVICE_NOT_FOUND;
439 * Note: the caller has already checked that offset is
440 * suitably aligned and that len is 1, 2 or 4.
449 (void) in_le16(addr);
452 out_le32((u32 __iomem *)addr, val);
453 (void) in_le32(addr);
456 return PCIBIOS_SUCCESSFUL;
459 static struct pci_ops u3_ht_pci_ops =
465 #define U4_PCIE_CFA0(devfn, off) \
466 ((1 << ((unsigned int)PCI_SLOT(dev_fn))) \
467 | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
468 | ((((unsigned int)(off)) >> 8) << 28) \
469 | (((unsigned int)(off)) & 0xfcU))
471 #define U4_PCIE_CFA1(bus, devfn, off) \
472 ((((unsigned int)(bus)) << 16) \
473 |(((unsigned int)(devfn)) << 8) \
474 | ((((unsigned int)(off)) >> 8) << 28) \
475 |(((unsigned int)(off)) & 0xfcU) \
478 static volatile void __iomem *u4_pcie_cfg_access(struct pci_controller* hose,
479 u8 bus, u8 dev_fn, int offset)
483 if (bus == hose->first_busno) {
484 caddr = U4_PCIE_CFA0(dev_fn, offset);
486 caddr = U4_PCIE_CFA1(bus, dev_fn, offset);
488 /* Uninorth will return garbage if we don't read back the value ! */
490 out_le32(hose->cfg_addr, caddr);
491 } while (in_le32(hose->cfg_addr) != caddr);
494 return hose->cfg_data + offset;
497 static int u4_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
498 int offset, int len, u32 *val)
500 struct pci_controller *hose;
501 volatile void __iomem *addr;
503 hose = pci_bus_to_host(bus);
505 return PCIBIOS_DEVICE_NOT_FOUND;
506 if (offset >= 0x1000)
507 return PCIBIOS_BAD_REGISTER_NUMBER;
508 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
510 return PCIBIOS_DEVICE_NOT_FOUND;
512 * Note: the caller has already checked that offset is
513 * suitably aligned and that len is 1, 2 or 4.
520 *val = in_le16(addr);
523 *val = in_le32(addr);
526 return PCIBIOS_SUCCESSFUL;
529 static int u4_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
530 int offset, int len, u32 val)
532 struct pci_controller *hose;
533 volatile void __iomem *addr;
535 hose = pci_bus_to_host(bus);
537 return PCIBIOS_DEVICE_NOT_FOUND;
538 if (offset >= 0x1000)
539 return PCIBIOS_BAD_REGISTER_NUMBER;
540 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
542 return PCIBIOS_DEVICE_NOT_FOUND;
544 * Note: the caller has already checked that offset is
545 * suitably aligned and that len is 1, 2 or 4.
554 (void) in_le16(addr);
558 (void) in_le32(addr);
561 return PCIBIOS_SUCCESSFUL;
564 static struct pci_ops u4_pcie_pci_ops =
570 #endif /* CONFIG_PPC64 */
574 * For a bandit bridge, turn on cache coherency if necessary.
575 * N.B. we could clean this up using the hose ops directly.
577 static void __init init_bandit(struct pci_controller *bp)
579 unsigned int vendev, magic;
582 /* read the word at offset 0 in config space for device 11 */
583 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_VENDOR_ID);
585 vendev = in_le32(bp->cfg_data);
586 if (vendev == (PCI_DEVICE_ID_APPLE_BANDIT << 16) +
587 PCI_VENDOR_ID_APPLE) {
588 /* read the revision id */
589 out_le32(bp->cfg_addr,
590 (1UL << BANDIT_DEVNUM) + PCI_REVISION_ID);
592 rev = in_8(bp->cfg_data);
593 if (rev != BANDIT_REVID)
595 "Unknown revision %d for bandit\n", rev);
596 } else if (vendev != (BANDIT_DEVID_2 << 16) + PCI_VENDOR_ID_APPLE) {
597 printk(KERN_WARNING "bandit isn't? (%x)\n", vendev);
601 /* read the word at offset 0x50 */
602 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + BANDIT_MAGIC);
604 magic = in_le32(bp->cfg_data);
605 if ((magic & BANDIT_COHERENT) != 0)
607 magic |= BANDIT_COHERENT;
609 out_le32(bp->cfg_data, magic);
610 printk(KERN_INFO "Cache coherency enabled for bandit/PSX\n");
614 * Tweak the PCI-PCI bridge chip on the blue & white G3s.
616 static void __init init_p2pbridge(void)
618 struct device_node *p2pbridge;
619 struct pci_controller* hose;
623 /* XXX it would be better here to identify the specific
624 PCI-PCI bridge chip we have. */
625 if ((p2pbridge = find_devices("pci-bridge")) == 0
626 || p2pbridge->parent == NULL
627 || strcmp(p2pbridge->parent->name, "pci") != 0)
629 if (pci_device_from_OF_node(p2pbridge, &bus, &devfn) < 0) {
630 DBG("Can't find PCI infos for PCI<->PCI bridge\n");
633 /* Warning: At this point, we have not yet renumbered all busses.
634 * So we must use OF walking to find out hose
636 hose = pci_find_hose_for_OF_device(p2pbridge);
638 DBG("Can't find hose for PCI<->PCI bridge\n");
641 if (early_read_config_word(hose, bus, devfn,
642 PCI_BRIDGE_CONTROL, &val) < 0) {
643 printk(KERN_ERR "init_p2pbridge: couldn't read bridge"
647 val &= ~PCI_BRIDGE_CTL_MASTER_ABORT;
648 early_write_config_word(hose, bus, devfn, PCI_BRIDGE_CONTROL, val);
651 static void __init init_second_ohare(void)
653 struct device_node *np = of_find_node_by_name(NULL, "pci106b,7");
654 unsigned char bus, devfn;
660 /* This must run before we initialize the PICs since the second
661 * ohare hosts a PIC that will be accessed there.
663 if (pci_device_from_OF_node(np, &bus, &devfn) == 0) {
664 struct pci_controller* hose =
665 pci_find_hose_for_OF_device(np);
667 printk(KERN_ERR "Can't find PCI hose for OHare2 !\n");
670 early_read_config_word(hose, bus, devfn, PCI_COMMAND, &cmd);
671 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
672 cmd &= ~PCI_COMMAND_IO;
673 early_write_config_word(hose, bus, devfn, PCI_COMMAND, cmd);
675 has_second_ohare = 1;
679 * Some Apple desktop machines have a NEC PD720100A USB2 controller
680 * on the motherboard. Open Firmware, on these, will disable the
681 * EHCI part of it so it behaves like a pair of OHCI's. This fixup
682 * code re-enables it ;)
684 static void __init fixup_nec_usb2(void)
686 struct device_node *nec;
688 for (nec = NULL; (nec = of_find_node_by_name(nec, "usb")) != NULL;) {
689 struct pci_controller *hose;
694 prop = get_property(nec, "vendor-id", NULL);
699 prop = get_property(nec, "device-id", NULL);
704 prop = get_property(nec, "reg", NULL);
707 devfn = (prop[0] >> 8) & 0xff;
708 bus = (prop[0] >> 16) & 0xff;
709 if (PCI_FUNC(devfn) != 0)
711 hose = pci_find_hose_for_OF_device(nec);
714 early_read_config_dword(hose, bus, devfn, 0xe4, &data);
716 printk("Found NEC PD720100A USB2 chip with disabled"
717 " EHCI, fixing up...\n");
719 early_write_config_dword(hose, bus, devfn, 0xe4, data);
724 static void __init setup_bandit(struct pci_controller *hose,
725 struct resource *addr)
727 hose->ops = ¯isc_pci_ops;
728 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
729 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
733 static int __init setup_uninorth(struct pci_controller *hose,
734 struct resource *addr)
736 pci_assign_all_buses = 1;
738 hose->ops = ¯isc_pci_ops;
739 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
740 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
741 /* We "know" that the bridge at f2000000 has the PCI slots. */
742 return addr->start == 0xf2000000;
744 #endif /* CONFIG_PPC32 */
747 static void __init setup_u3_agp(struct pci_controller* hose)
749 /* On G5, we move AGP up to high bus number so we don't need
750 * to reassign bus numbers for HT. If we ever have P2P bridges
751 * on AGP, we'll have to move pci_assign_all_busses to the
752 * pci_controller structure so we enable it for AGP and not for
754 * We hard code the address because of the different size of
755 * the reg address cell, we shall fix that by killing struct
756 * reg_property and using some accessor functions instead
758 hose->first_busno = 0xf0;
759 hose->last_busno = 0xff;
761 hose->ops = ¯isc_pci_ops;
762 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
763 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
767 static void __init setup_u4_pcie(struct pci_controller* hose)
769 /* We currently only implement the "non-atomic" config space, to
770 * be optimised later.
772 hose->ops = &u4_pcie_pci_ops;
773 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
774 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
776 /* The bus contains a bridge from root -> device, we need to
777 * make it visible on bus 0 so that we pick the right type
778 * of config cycles. If we didn't, we would have to force all
779 * config cycles to be type 1. So we override the "bus-range"
782 hose->first_busno = 0x00;
783 hose->last_busno = 0xff;
787 static void __init setup_u3_ht(struct pci_controller* hose)
789 struct device_node *np = (struct device_node *)hose->arch_data;
790 struct pci_controller *other = NULL;
794 hose->ops = &u3_ht_pci_ops;
796 /* We hard code the address because of the different size of
797 * the reg address cell, we shall fix that by killing struct
798 * reg_property and using some accessor functions instead
800 hose->cfg_data = ioremap(0xf2000000, 0x02000000);
803 * /ht node doesn't expose a "ranges" property, so we "remove"
804 * regions that have been allocated to AGP. So far, this version of
805 * the code doesn't assign any of the 0xfxxxxxxx "fine" memory regions
806 * to /ht. We need to fix that sooner or later by either parsing all
807 * child "ranges" properties or figuring out the U3 address space
808 * decoding logic and then read its configuration register (if any).
810 hose->io_base_phys = 0xf4000000;
811 hose->pci_io_size = 0x00400000;
812 hose->io_resource.name = np->full_name;
813 hose->io_resource.start = 0;
814 hose->io_resource.end = 0x003fffff;
815 hose->io_resource.flags = IORESOURCE_IO;
816 hose->pci_mem_offset = 0;
817 hose->first_busno = 0;
818 hose->last_busno = 0xef;
819 hose->mem_resources[0].name = np->full_name;
820 hose->mem_resources[0].start = 0x80000000;
821 hose->mem_resources[0].end = 0xefffffff;
822 hose->mem_resources[0].flags = IORESOURCE_MEM;
828 else if (u4_pcie != NULL)
832 DBG("U3/4 has no AGP/PCIE, using full resource range\n");
836 /* Fixup bus range vs. PCIE */
838 hose->last_busno = u4_pcie->first_busno - 1;
840 /* We "remove" the AGP resources from the resources allocated to HT,
841 * that is we create "holes". However, that code does assumptions
842 * that so far happen to be true (cross fingers...), typically that
843 * resources in the AGP node are properly ordered
846 for (i=0; i<3; i++) {
847 struct resource *res = &other->mem_resources[i];
848 if (res->flags != IORESOURCE_MEM)
850 /* We don't care about "fine" resources */
851 if (res->start >= 0xf0000000)
853 /* Check if it's just a matter of "shrinking" us in one
856 if (hose->mem_resources[cur].start == res->start) {
857 DBG("U3/HT: shrink start of %d, %08lx -> %08lx\n",
858 cur, hose->mem_resources[cur].start,
860 hose->mem_resources[cur].start = res->end + 1;
863 if (hose->mem_resources[cur].end == res->end) {
864 DBG("U3/HT: shrink end of %d, %08lx -> %08lx\n",
865 cur, hose->mem_resources[cur].end,
867 hose->mem_resources[cur].end = res->start - 1;
870 /* No, it's not the case, we need a hole */
872 /* not enough resources for a hole, we drop part
875 printk(KERN_WARNING "Running out of resources"
876 " for /ht host !\n");
877 hose->mem_resources[cur].end = res->start - 1;
881 DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
882 cur-1, res->start - 1, cur, res->end + 1);
883 hose->mem_resources[cur].name = np->full_name;
884 hose->mem_resources[cur].flags = IORESOURCE_MEM;
885 hose->mem_resources[cur].start = res->end + 1;
886 hose->mem_resources[cur].end = hose->mem_resources[cur-1].end;
887 hose->mem_resources[cur-1].end = res->start - 1;
890 #endif /* CONFIG_PPC64 */
893 * We assume that if we have a G3 powermac, we have one bridge called
894 * "pci" (a MPC106) and no bandit or chaos bridges, and contrariwise,
895 * if we have one or more bandit or chaos bridges, we don't have a MPC106.
897 static int __init add_bridge(struct device_node *dev)
900 struct pci_controller *hose;
901 struct resource rsrc;
903 const int *bus_range;
904 int primary = 1, has_address = 0;
906 DBG("Adding PCI host bridge %s\n", dev->full_name);
908 /* Fetch host bridge registers address */
909 has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
911 /* Get bus range if any */
912 bus_range = get_property(dev, "bus-range", &len);
913 if (bus_range == NULL || len < 2 * sizeof(int)) {
914 printk(KERN_WARNING "Can't get bus-range for %s, assume"
915 " bus 0\n", dev->full_name);
918 /* XXX Different prototypes, to be merged */
920 hose = pcibios_alloc_controller(dev);
922 hose = pcibios_alloc_controller();
926 hose->arch_data = dev;
927 hose->first_busno = bus_range ? bus_range[0] : 0;
928 hose->last_busno = bus_range ? bus_range[1] : 0xff;
932 /* 64 bits only bridges */
934 if (device_is_compatible(dev, "u3-agp")) {
936 disp_name = "U3-AGP";
938 } else if (device_is_compatible(dev, "u3-ht")) {
942 } else if (device_is_compatible(dev, "u4-pcie")) {
944 disp_name = "U4-PCIE";
947 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number:"
948 " %d->%d\n", disp_name, hose->first_busno, hose->last_busno);
949 #endif /* CONFIG_PPC64 */
951 /* 32 bits only bridges */
953 if (device_is_compatible(dev, "uni-north")) {
954 primary = setup_uninorth(hose, &rsrc);
955 disp_name = "UniNorth";
956 } else if (strcmp(dev->name, "pci") == 0) {
957 /* XXX assume this is a mpc106 (grackle) */
959 disp_name = "Grackle (MPC106)";
960 } else if (strcmp(dev->name, "bandit") == 0) {
961 setup_bandit(hose, &rsrc);
962 disp_name = "Bandit";
963 } else if (strcmp(dev->name, "chaos") == 0) {
964 setup_chaos(hose, &rsrc);
968 printk(KERN_INFO "Found %s PCI host bridge at 0x%016llx. "
969 "Firmware bus number: %d->%d\n",
970 disp_name, (unsigned long long)rsrc.start, hose->first_busno,
972 #endif /* CONFIG_PPC32 */
974 DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
975 hose, hose->cfg_addr, hose->cfg_data);
977 /* Interpret the "ranges" property */
978 /* This also maps the I/O region and sets isa_io/mem_base */
979 pci_process_bridge_OF_ranges(hose, dev, primary);
981 /* Fixup "bus-range" OF property */
982 fixup_bus_range(dev);
987 void __devinit pmac_pci_irq_fixup(struct pci_dev *dev)
990 /* Fixup interrupt for the modem/ethernet combo controller.
991 * on machines with a second ohare chip.
992 * The number in the device tree (27) is bogus (correct for
993 * the ethernet-only board but not the combo ethernet/modem
994 * board). The real interrupt is 28 on the second controller
997 if (has_second_ohare &&
998 dev->vendor == PCI_VENDOR_ID_DEC &&
999 dev->device == PCI_DEVICE_ID_DEC_TULIP_PLUS) {
1000 dev->irq = irq_create_mapping(NULL, 60);
1001 set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
1003 #endif /* CONFIG_PPC32 */
1007 static void __init pmac_fixup_phb_resources(void)
1009 struct pci_controller *hose, *tmp;
1011 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
1012 printk(KERN_INFO "PCI Host %d, io start: %lx; io end: %lx\n",
1013 hose->global_number,
1014 hose->io_resource.start, hose->io_resource.end);
1019 void __init pmac_pci_init(void)
1021 struct device_node *np, *root;
1022 struct device_node *ht = NULL;
1024 root = of_find_node_by_path("/");
1026 printk(KERN_CRIT "pmac_pci_init: can't find root "
1027 "of device tree\n");
1030 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
1031 if (np->name == NULL)
1033 if (strcmp(np->name, "bandit") == 0
1034 || strcmp(np->name, "chaos") == 0
1035 || strcmp(np->name, "pci") == 0) {
1036 if (add_bridge(np) == 0)
1039 if (strcmp(np->name, "ht") == 0) {
1047 /* Probe HT last as it relies on the agp resources to be already
1050 if (ht && add_bridge(ht) != 0)
1054 * We need to call pci_setup_phb_io for the HT bridge first
1055 * so it gets the I/O port numbers starting at 0, and we
1056 * need to call it for the AGP bridge after that so it gets
1057 * small positive I/O port numbers.
1060 pci_setup_phb_io(u3_ht, 1);
1062 pci_setup_phb_io(u3_agp, 0);
1064 pci_setup_phb_io(u4_pcie, 0);
1067 * On ppc64, fixup the IO resources on our host bridges as
1068 * the common code does it only for children of the host bridges
1070 pmac_fixup_phb_resources();
1072 /* Setup the linkage between OF nodes and PHBs */
1073 pci_devs_phb_init();
1075 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
1076 * assume there is no P2P bridge on the AGP bus, which should be a
1077 * safe assumptions for now. We should do something better in the
1081 struct device_node *np = u3_agp->arch_data;
1082 PCI_DN(np)->busno = 0xf0;
1083 for (np = np->child; np; np = np->sibling)
1084 PCI_DN(np)->busno = 0xf0;
1086 /* pmac_check_ht_link(); */
1088 /* Tell pci.c to not use the common resource allocation mechanism */
1091 #else /* CONFIG_PPC64 */
1093 init_second_ohare();
1096 /* We are still having some issues with the Xserve G4, enabling
1097 * some offset between bus number and domains for now when we
1098 * assign all busses should help for now
1100 if (pci_assign_all_buses)
1101 pcibios_assign_bus_offset = 0x10;
1106 pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
1108 struct device_node* node;
1112 node = pci_device_to_OF_node(dev);
1114 /* We don't want to enable USB controllers absent from the OF tree
1115 * (iBook second controller)
1117 if (dev->vendor == PCI_VENDOR_ID_APPLE
1118 && dev->class == PCI_CLASS_SERIAL_USB_OHCI
1120 printk(KERN_INFO "Apple USB OHCI %s disabled by firmware\n",
1128 uninorth_child = node->parent &&
1129 device_is_compatible(node->parent, "uni-north");
1131 /* Firewire & GMAC were disabled after PCI probe, the driver is
1132 * claiming them, we must re-enable them now.
1134 if (uninorth_child && !strcmp(node->name, "firewire") &&
1135 (device_is_compatible(node, "pci106b,18") ||
1136 device_is_compatible(node, "pci106b,30") ||
1137 device_is_compatible(node, "pci11c1,5811"))) {
1138 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, node, 0, 1);
1139 pmac_call_feature(PMAC_FTR_1394_ENABLE, node, 0, 1);
1142 if (uninorth_child && !strcmp(node->name, "ethernet") &&
1143 device_is_compatible(node, "gmac")) {
1144 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, node, 0, 1);
1152 * Make sure PCI is correctly configured
1154 * We use old pci_bios versions of the function since, by
1155 * default, gmac is not powered up, and so will be absent
1156 * from the kernel initial PCI lookup.
1158 * Should be replaced by 2.4 new PCI mechanisms and really
1159 * register the device.
1161 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1162 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1163 | PCI_COMMAND_INVALIDATE;
1164 pci_write_config_word(dev, PCI_COMMAND, cmd);
1165 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 16);
1166 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
1167 L1_CACHE_BYTES >> 2);
1173 /* We power down some devices after they have been probed. They'll
1174 * be powered back on later on
1176 void __init pmac_pcibios_after_init(void)
1178 struct device_node* nd;
1180 #ifdef CONFIG_BLK_DEV_IDE
1181 struct pci_dev *dev = NULL;
1183 /* OF fails to initialize IDE controllers on macs
1184 * (and maybe other machines)
1186 * Ideally, this should be moved to the IDE layer, but we need
1187 * to check specifically with Andre Hedrick how to do it cleanly
1188 * since the common IDE code seem to care about the fact that the
1189 * BIOS may have disabled a controller.
1193 for_each_pci_dev(dev) {
1194 if ((dev->class >> 16) == PCI_BASE_CLASS_STORAGE)
1195 pci_enable_device(dev);
1197 #endif /* CONFIG_BLK_DEV_IDE */
1199 nd = find_devices("firewire");
1201 if (nd->parent && (device_is_compatible(nd, "pci106b,18") ||
1202 device_is_compatible(nd, "pci106b,30") ||
1203 device_is_compatible(nd, "pci11c1,5811"))
1204 && device_is_compatible(nd->parent, "uni-north")) {
1205 pmac_call_feature(PMAC_FTR_1394_ENABLE, nd, 0, 0);
1206 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, nd, 0, 0);
1210 nd = find_devices("ethernet");
1212 if (nd->parent && device_is_compatible(nd, "gmac")
1213 && device_is_compatible(nd->parent, "uni-north"))
1214 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, nd, 0, 0);
1220 void pmac_pci_fixup_cardbus(struct pci_dev* dev)
1222 if (!machine_is(powermac))
1225 * Fix the interrupt routing on the various cardbus bridges
1226 * used on powerbooks
1228 if (dev->vendor != PCI_VENDOR_ID_TI)
1230 if (dev->device == PCI_DEVICE_ID_TI_1130 ||
1231 dev->device == PCI_DEVICE_ID_TI_1131) {
1233 /* Enable PCI interrupt */
1234 if (pci_read_config_byte(dev, 0x91, &val) == 0)
1235 pci_write_config_byte(dev, 0x91, val | 0x30);
1236 /* Disable ISA interrupt mode */
1237 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1238 pci_write_config_byte(dev, 0x92, val & ~0x06);
1240 if (dev->device == PCI_DEVICE_ID_TI_1210 ||
1241 dev->device == PCI_DEVICE_ID_TI_1211 ||
1242 dev->device == PCI_DEVICE_ID_TI_1410 ||
1243 dev->device == PCI_DEVICE_ID_TI_1510) {
1245 /* 0x8c == TI122X_IRQMUX, 2 says to route the INTA
1246 signal out the MFUNC0 pin */
1247 if (pci_read_config_byte(dev, 0x8c, &val) == 0)
1248 pci_write_config_byte(dev, 0x8c, (val & ~0x0f) | 2);
1249 /* Disable ISA interrupt mode */
1250 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1251 pci_write_config_byte(dev, 0x92, val & ~0x06);
1255 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus);
1257 void pmac_pci_fixup_pciata(struct pci_dev* dev)
1262 * On PowerMacs, we try to switch any PCI ATA controller to
1265 if (!machine_is(powermac))
1268 /* Some controllers don't have the class IDE */
1269 if (dev->vendor == PCI_VENDOR_ID_PROMISE)
1270 switch(dev->device) {
1271 case PCI_DEVICE_ID_PROMISE_20246:
1272 case PCI_DEVICE_ID_PROMISE_20262:
1273 case PCI_DEVICE_ID_PROMISE_20263:
1274 case PCI_DEVICE_ID_PROMISE_20265:
1275 case PCI_DEVICE_ID_PROMISE_20267:
1276 case PCI_DEVICE_ID_PROMISE_20268:
1277 case PCI_DEVICE_ID_PROMISE_20269:
1278 case PCI_DEVICE_ID_PROMISE_20270:
1279 case PCI_DEVICE_ID_PROMISE_20271:
1280 case PCI_DEVICE_ID_PROMISE_20275:
1281 case PCI_DEVICE_ID_PROMISE_20276:
1282 case PCI_DEVICE_ID_PROMISE_20277:
1285 /* Others, check PCI class */
1286 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
1289 pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
1290 if ((progif & 5) != 5) {
1291 printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n",
1293 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
1294 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
1296 printk(KERN_ERR "Rewrite of PROGIF failed !\n");
1299 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
1303 * Disable second function on K2-SATA, it's broken
1304 * and disable IO BARs on first one
1306 static void fixup_k2_sata(struct pci_dev* dev)
1311 if (PCI_FUNC(dev->devfn) > 0) {
1312 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1313 cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
1314 pci_write_config_word(dev, PCI_COMMAND, cmd);
1315 for (i = 0; i < 6; i++) {
1316 dev->resource[i].start = dev->resource[i].end = 0;
1317 dev->resource[i].flags = 0;
1318 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1322 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1323 cmd &= ~PCI_COMMAND_IO;
1324 pci_write_config_word(dev, PCI_COMMAND, cmd);
1325 for (i = 0; i < 5; i++) {
1326 dev->resource[i].start = dev->resource[i].end = 0;
1327 dev->resource[i].flags = 0;
1328 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1333 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, 0x0240, fixup_k2_sata);