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>
20 #include <asm/sections.h>
23 #include <asm/pci-bridge.h>
24 #include <asm/machdep.h>
25 #include <asm/pmac_feature.h>
26 #include <asm/grackle.h>
28 //#include <asm/iommu.h>
29 #include <asm/ppc-pci.h>
35 #define DBG(x...) printk(x)
40 static int add_bridge(struct device_node *dev);
42 /* XXX Could be per-controller, but I don't think we risk anything by
43 * assuming we won't have both UniNorth and Bandit */
44 static int has_uninorth;
46 static struct pci_controller *u3_agp;
47 static struct pci_controller *u4_pcie;
48 static struct pci_controller *u3_ht;
49 #define has_second_ohare 0
51 static int has_second_ohare;
52 #endif /* CONFIG_PPC64 */
54 extern u8 pci_cache_line_size;
55 extern int pcibios_assign_bus_offset;
57 struct device_node *k2_skiplist[2];
60 * Magic constants for enabling cache coherency in the bandit/PSX bridge.
62 #define BANDIT_DEVID_2 8
63 #define BANDIT_REVID 3
65 #define BANDIT_DEVNUM 11
66 #define BANDIT_MAGIC 0x50
67 #define BANDIT_COHERENT 0x40
69 static int __init fixup_one_level_bus_range(struct device_node *node, int higher)
71 for (; node != 0;node = node->sibling) {
72 const int * bus_range;
73 const unsigned int *class_code;
76 /* For PCI<->PCI bridges or CardBus bridges, we go down */
77 class_code = get_property(node, "class-code", NULL);
78 if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
79 (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
81 bus_range = get_property(node, "bus-range", &len);
82 if (bus_range != NULL && len > 2 * sizeof(int)) {
83 if (bus_range[1] > higher)
84 higher = bus_range[1];
86 higher = fixup_one_level_bus_range(node->child, higher);
91 /* This routine fixes the "bus-range" property of all bridges in the
92 * system since they tend to have their "last" member wrong on macs
94 * Note that the bus numbers manipulated here are OF bus numbers, they
95 * are not Linux bus numbers.
97 static void __init fixup_bus_range(struct device_node *bridge)
100 struct property *prop;
102 /* Lookup the "bus-range" property for the hose */
103 prop = of_find_property(bridge, "bus-range", &len);
104 if (prop == NULL || prop->length < 2 * sizeof(int))
107 bus_range = (int *)prop->value;
108 bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
112 * Apple MacRISC (U3, UniNorth, Bandit, Chaos) PCI controllers.
114 * The "Bandit" version is present in all early PCI PowerMacs,
115 * and up to the first ones using Grackle. Some machines may
116 * have 2 bandit controllers (2 PCI busses).
118 * "Chaos" is used in some "Bandit"-type machines as a bridge
119 * for the separate display bus. It is accessed the same
120 * way as bandit, but cannot be probed for devices. It therefore
121 * has its own config access functions.
123 * The "UniNorth" version is present in all Core99 machines
124 * (iBook, G4, new IMacs, and all the recent Apple machines).
125 * It contains 3 controllers in one ASIC.
127 * The U3 is the bridge used on G5 machines. It contains an
128 * AGP bus which is dealt with the old UniNorth access routines
129 * and a HyperTransport bus which uses its own set of access
133 #define MACRISC_CFA0(devfn, off) \
134 ((1 << (unsigned int)PCI_SLOT(dev_fn)) \
135 | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
136 | (((unsigned int)(off)) & 0xFCUL))
138 #define MACRISC_CFA1(bus, devfn, off) \
139 ((((unsigned int)(bus)) << 16) \
140 |(((unsigned int)(devfn)) << 8) \
141 |(((unsigned int)(off)) & 0xFCUL) \
144 static volatile void __iomem *macrisc_cfg_access(struct pci_controller* hose,
145 u8 bus, u8 dev_fn, u8 offset)
149 if (bus == hose->first_busno) {
150 if (dev_fn < (11 << 3))
152 caddr = MACRISC_CFA0(dev_fn, offset);
154 caddr = MACRISC_CFA1(bus, dev_fn, offset);
156 /* Uninorth will return garbage if we don't read back the value ! */
158 out_le32(hose->cfg_addr, caddr);
159 } while (in_le32(hose->cfg_addr) != caddr);
161 offset &= has_uninorth ? 0x07 : 0x03;
162 return hose->cfg_data + offset;
165 static int macrisc_read_config(struct pci_bus *bus, unsigned int devfn,
166 int offset, int len, u32 *val)
168 struct pci_controller *hose;
169 volatile void __iomem *addr;
171 hose = pci_bus_to_host(bus);
173 return PCIBIOS_DEVICE_NOT_FOUND;
175 return PCIBIOS_BAD_REGISTER_NUMBER;
176 addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
178 return PCIBIOS_DEVICE_NOT_FOUND;
180 * Note: the caller has already checked that offset is
181 * suitably aligned and that len is 1, 2 or 4.
188 *val = in_le16(addr);
191 *val = in_le32(addr);
194 return PCIBIOS_SUCCESSFUL;
197 static int macrisc_write_config(struct pci_bus *bus, unsigned int devfn,
198 int offset, int len, u32 val)
200 struct pci_controller *hose;
201 volatile void __iomem *addr;
203 hose = pci_bus_to_host(bus);
205 return PCIBIOS_DEVICE_NOT_FOUND;
207 return PCIBIOS_BAD_REGISTER_NUMBER;
208 addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
210 return PCIBIOS_DEVICE_NOT_FOUND;
212 * Note: the caller has already checked that offset is
213 * suitably aligned and that len is 1, 2 or 4.
222 (void) in_le16(addr);
226 (void) in_le32(addr);
229 return PCIBIOS_SUCCESSFUL;
232 static struct pci_ops macrisc_pci_ops =
240 * Verify that a specific (bus, dev_fn) exists on chaos
242 static int chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
244 struct device_node *np;
245 const u32 *vendor, *device;
248 return PCIBIOS_BAD_REGISTER_NUMBER;
249 np = pci_busdev_to_OF_node(bus, devfn);
251 return PCIBIOS_DEVICE_NOT_FOUND;
253 vendor = get_property(np, "vendor-id", NULL);
254 device = get_property(np, "device-id", NULL);
255 if (vendor == NULL || device == NULL)
256 return PCIBIOS_DEVICE_NOT_FOUND;
258 if ((*vendor == 0x106b) && (*device == 3) && (offset >= 0x10)
259 && (offset != 0x14) && (offset != 0x18) && (offset <= 0x24))
260 return PCIBIOS_BAD_REGISTER_NUMBER;
262 return PCIBIOS_SUCCESSFUL;
266 chaos_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
269 int result = chaos_validate_dev(bus, devfn, offset);
270 if (result == PCIBIOS_BAD_REGISTER_NUMBER)
272 if (result != PCIBIOS_SUCCESSFUL)
274 return macrisc_read_config(bus, devfn, offset, len, val);
278 chaos_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
281 int result = chaos_validate_dev(bus, devfn, offset);
282 if (result != PCIBIOS_SUCCESSFUL)
284 return macrisc_write_config(bus, devfn, offset, len, val);
287 static struct pci_ops chaos_pci_ops =
293 static void __init setup_chaos(struct pci_controller *hose,
294 struct resource *addr)
296 /* assume a `chaos' bridge */
297 hose->ops = &chaos_pci_ops;
298 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
299 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
301 #endif /* CONFIG_PPC32 */
305 * These versions of U3 HyperTransport config space access ops do not
306 * implement self-view of the HT host yet
310 * This function deals with some "special cases" devices.
312 * 0 -> No special case
313 * 1 -> Skip the device but act as if the access was successfull
314 * (return 0xff's on reads, eventually, cache config space
315 * accesses in a later version)
316 * -1 -> Hide the device (unsuccessful acess)
318 static int u3_ht_skip_device(struct pci_controller *hose,
319 struct pci_bus *bus, unsigned int devfn)
321 struct device_node *busdn, *dn;
324 /* We only allow config cycles to devices that are in OF device-tree
325 * as we are apparently having some weird things going on with some
326 * revs of K2 on recent G5s
329 busdn = pci_device_to_OF_node(bus->self);
331 busdn = hose->arch_data;
332 for (dn = busdn->child; dn; dn = dn->sibling)
333 if (PCI_DN(dn) && PCI_DN(dn)->devfn == devfn)
339 * When a device in K2 is powered down, we die on config
340 * cycle accesses. Fix that here.
343 if (k2_skiplist[i] == dn)
349 #define U3_HT_CFA0(devfn, off) \
350 ((((unsigned int)devfn) << 8) | offset)
351 #define U3_HT_CFA1(bus, devfn, off) \
352 (U3_HT_CFA0(devfn, off) \
353 + (((unsigned int)bus) << 16) \
356 static volatile void __iomem *u3_ht_cfg_access(struct pci_controller* hose,
357 u8 bus, u8 devfn, u8 offset)
359 if (bus == hose->first_busno) {
360 /* For now, we don't self probe U3 HT bridge */
361 if (PCI_SLOT(devfn) == 0)
363 return hose->cfg_data + U3_HT_CFA0(devfn, offset);
365 return hose->cfg_data + U3_HT_CFA1(bus, devfn, offset);
368 static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
369 int offset, int len, u32 *val)
371 struct pci_controller *hose;
372 volatile void __iomem *addr;
374 hose = pci_bus_to_host(bus);
376 return PCIBIOS_DEVICE_NOT_FOUND;
378 return PCIBIOS_BAD_REGISTER_NUMBER;
379 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
381 return PCIBIOS_DEVICE_NOT_FOUND;
383 switch (u3_ht_skip_device(hose, bus, devfn)) {
391 *val = 0xffff; break;
393 *val = 0xfffffffful; break;
395 return PCIBIOS_SUCCESSFUL;
397 return PCIBIOS_DEVICE_NOT_FOUND;
401 * Note: the caller has already checked that offset is
402 * suitably aligned and that len is 1, 2 or 4.
409 *val = in_le16(addr);
412 *val = in_le32(addr);
415 return PCIBIOS_SUCCESSFUL;
418 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
419 int offset, int len, u32 val)
421 struct pci_controller *hose;
422 volatile void __iomem *addr;
424 hose = pci_bus_to_host(bus);
426 return PCIBIOS_DEVICE_NOT_FOUND;
428 return PCIBIOS_BAD_REGISTER_NUMBER;
429 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
431 return PCIBIOS_DEVICE_NOT_FOUND;
433 switch (u3_ht_skip_device(hose, bus, devfn)) {
437 return PCIBIOS_SUCCESSFUL;
439 return PCIBIOS_DEVICE_NOT_FOUND;
443 * Note: the caller has already checked that offset is
444 * suitably aligned and that len is 1, 2 or 4.
453 (void) in_le16(addr);
456 out_le32((u32 __iomem *)addr, val);
457 (void) in_le32(addr);
460 return PCIBIOS_SUCCESSFUL;
463 static struct pci_ops u3_ht_pci_ops =
469 #define U4_PCIE_CFA0(devfn, off) \
470 ((1 << ((unsigned int)PCI_SLOT(dev_fn))) \
471 | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
472 | ((((unsigned int)(off)) >> 8) << 28) \
473 | (((unsigned int)(off)) & 0xfcU))
475 #define U4_PCIE_CFA1(bus, devfn, off) \
476 ((((unsigned int)(bus)) << 16) \
477 |(((unsigned int)(devfn)) << 8) \
478 | ((((unsigned int)(off)) >> 8) << 28) \
479 |(((unsigned int)(off)) & 0xfcU) \
482 static volatile void __iomem *u4_pcie_cfg_access(struct pci_controller* hose,
483 u8 bus, u8 dev_fn, int offset)
487 if (bus == hose->first_busno) {
488 caddr = U4_PCIE_CFA0(dev_fn, offset);
490 caddr = U4_PCIE_CFA1(bus, dev_fn, offset);
492 /* Uninorth will return garbage if we don't read back the value ! */
494 out_le32(hose->cfg_addr, caddr);
495 } while (in_le32(hose->cfg_addr) != caddr);
498 return hose->cfg_data + offset;
501 static int u4_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
502 int offset, int len, u32 *val)
504 struct pci_controller *hose;
505 volatile void __iomem *addr;
507 hose = pci_bus_to_host(bus);
509 return PCIBIOS_DEVICE_NOT_FOUND;
510 if (offset >= 0x1000)
511 return PCIBIOS_BAD_REGISTER_NUMBER;
512 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
514 return PCIBIOS_DEVICE_NOT_FOUND;
516 * Note: the caller has already checked that offset is
517 * suitably aligned and that len is 1, 2 or 4.
524 *val = in_le16(addr);
527 *val = in_le32(addr);
530 return PCIBIOS_SUCCESSFUL;
533 static int u4_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
534 int offset, int len, u32 val)
536 struct pci_controller *hose;
537 volatile void __iomem *addr;
539 hose = pci_bus_to_host(bus);
541 return PCIBIOS_DEVICE_NOT_FOUND;
542 if (offset >= 0x1000)
543 return PCIBIOS_BAD_REGISTER_NUMBER;
544 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
546 return PCIBIOS_DEVICE_NOT_FOUND;
548 * Note: the caller has already checked that offset is
549 * suitably aligned and that len is 1, 2 or 4.
558 (void) in_le16(addr);
562 (void) in_le32(addr);
565 return PCIBIOS_SUCCESSFUL;
568 static struct pci_ops u4_pcie_pci_ops =
574 #endif /* CONFIG_PPC64 */
578 * For a bandit bridge, turn on cache coherency if necessary.
579 * N.B. we could clean this up using the hose ops directly.
581 static void __init init_bandit(struct pci_controller *bp)
583 unsigned int vendev, magic;
586 /* read the word at offset 0 in config space for device 11 */
587 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_VENDOR_ID);
589 vendev = in_le32(bp->cfg_data);
590 if (vendev == (PCI_DEVICE_ID_APPLE_BANDIT << 16) +
591 PCI_VENDOR_ID_APPLE) {
592 /* read the revision id */
593 out_le32(bp->cfg_addr,
594 (1UL << BANDIT_DEVNUM) + PCI_REVISION_ID);
596 rev = in_8(bp->cfg_data);
597 if (rev != BANDIT_REVID)
599 "Unknown revision %d for bandit\n", rev);
600 } else if (vendev != (BANDIT_DEVID_2 << 16) + PCI_VENDOR_ID_APPLE) {
601 printk(KERN_WARNING "bandit isn't? (%x)\n", vendev);
605 /* read the word at offset 0x50 */
606 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + BANDIT_MAGIC);
608 magic = in_le32(bp->cfg_data);
609 if ((magic & BANDIT_COHERENT) != 0)
611 magic |= BANDIT_COHERENT;
613 out_le32(bp->cfg_data, magic);
614 printk(KERN_INFO "Cache coherency enabled for bandit/PSX\n");
618 * Tweak the PCI-PCI bridge chip on the blue & white G3s.
620 static void __init init_p2pbridge(void)
622 struct device_node *p2pbridge;
623 struct pci_controller* hose;
627 /* XXX it would be better here to identify the specific
628 PCI-PCI bridge chip we have. */
629 if ((p2pbridge = find_devices("pci-bridge")) == 0
630 || p2pbridge->parent == NULL
631 || strcmp(p2pbridge->parent->name, "pci") != 0)
633 if (pci_device_from_OF_node(p2pbridge, &bus, &devfn) < 0) {
634 DBG("Can't find PCI infos for PCI<->PCI bridge\n");
637 /* Warning: At this point, we have not yet renumbered all busses.
638 * So we must use OF walking to find out hose
640 hose = pci_find_hose_for_OF_device(p2pbridge);
642 DBG("Can't find hose for PCI<->PCI bridge\n");
645 if (early_read_config_word(hose, bus, devfn,
646 PCI_BRIDGE_CONTROL, &val) < 0) {
647 printk(KERN_ERR "init_p2pbridge: couldn't read bridge"
651 val &= ~PCI_BRIDGE_CTL_MASTER_ABORT;
652 early_write_config_word(hose, bus, devfn, PCI_BRIDGE_CONTROL, val);
655 static void __init init_second_ohare(void)
657 struct device_node *np = of_find_node_by_name(NULL, "pci106b,7");
658 unsigned char bus, devfn;
664 /* This must run before we initialize the PICs since the second
665 * ohare hosts a PIC that will be accessed there.
667 if (pci_device_from_OF_node(np, &bus, &devfn) == 0) {
668 struct pci_controller* hose =
669 pci_find_hose_for_OF_device(np);
671 printk(KERN_ERR "Can't find PCI hose for OHare2 !\n");
674 early_read_config_word(hose, bus, devfn, PCI_COMMAND, &cmd);
675 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
676 cmd &= ~PCI_COMMAND_IO;
677 early_write_config_word(hose, bus, devfn, PCI_COMMAND, cmd);
679 has_second_ohare = 1;
683 * Some Apple desktop machines have a NEC PD720100A USB2 controller
684 * on the motherboard. Open Firmware, on these, will disable the
685 * EHCI part of it so it behaves like a pair of OHCI's. This fixup
686 * code re-enables it ;)
688 static void __init fixup_nec_usb2(void)
690 struct device_node *nec;
692 for (nec = NULL; (nec = of_find_node_by_name(nec, "usb")) != NULL;) {
693 struct pci_controller *hose;
698 prop = get_property(nec, "vendor-id", NULL);
703 prop = get_property(nec, "device-id", NULL);
708 prop = get_property(nec, "reg", NULL);
711 devfn = (prop[0] >> 8) & 0xff;
712 bus = (prop[0] >> 16) & 0xff;
713 if (PCI_FUNC(devfn) != 0)
715 hose = pci_find_hose_for_OF_device(nec);
718 early_read_config_dword(hose, bus, devfn, 0xe4, &data);
720 printk("Found NEC PD720100A USB2 chip with disabled"
721 " EHCI, fixing up...\n");
723 early_write_config_dword(hose, bus, devfn, 0xe4, data);
728 static void __init setup_bandit(struct pci_controller *hose,
729 struct resource *addr)
731 hose->ops = ¯isc_pci_ops;
732 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
733 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
737 static int __init setup_uninorth(struct pci_controller *hose,
738 struct resource *addr)
740 pci_assign_all_buses = 1;
742 hose->ops = ¯isc_pci_ops;
743 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
744 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
745 /* We "know" that the bridge at f2000000 has the PCI slots. */
746 return addr->start == 0xf2000000;
748 #endif /* CONFIG_PPC32 */
751 static void __init setup_u3_agp(struct pci_controller* hose)
753 /* On G5, we move AGP up to high bus number so we don't need
754 * to reassign bus numbers for HT. If we ever have P2P bridges
755 * on AGP, we'll have to move pci_assign_all_busses to the
756 * pci_controller structure so we enable it for AGP and not for
758 * We hard code the address because of the different size of
759 * the reg address cell, we shall fix that by killing struct
760 * reg_property and using some accessor functions instead
762 hose->first_busno = 0xf0;
763 hose->last_busno = 0xff;
765 hose->ops = ¯isc_pci_ops;
766 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
767 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
771 static void __init setup_u4_pcie(struct pci_controller* hose)
773 /* We currently only implement the "non-atomic" config space, to
774 * be optimised later.
776 hose->ops = &u4_pcie_pci_ops;
777 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
778 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
780 /* The bus contains a bridge from root -> device, we need to
781 * make it visible on bus 0 so that we pick the right type
782 * of config cycles. If we didn't, we would have to force all
783 * config cycles to be type 1. So we override the "bus-range"
786 hose->first_busno = 0x00;
787 hose->last_busno = 0xff;
791 static void __init setup_u3_ht(struct pci_controller* hose)
793 struct device_node *np = (struct device_node *)hose->arch_data;
794 struct pci_controller *other = NULL;
798 hose->ops = &u3_ht_pci_ops;
800 /* We hard code the address because of the different size of
801 * the reg address cell, we shall fix that by killing struct
802 * reg_property and using some accessor functions instead
804 hose->cfg_data = ioremap(0xf2000000, 0x02000000);
807 * /ht node doesn't expose a "ranges" property, so we "remove"
808 * regions that have been allocated to AGP. So far, this version of
809 * the code doesn't assign any of the 0xfxxxxxxx "fine" memory regions
810 * to /ht. We need to fix that sooner or later by either parsing all
811 * child "ranges" properties or figuring out the U3 address space
812 * decoding logic and then read its configuration register (if any).
814 hose->io_base_phys = 0xf4000000;
815 hose->pci_io_size = 0x00400000;
816 hose->io_resource.name = np->full_name;
817 hose->io_resource.start = 0;
818 hose->io_resource.end = 0x003fffff;
819 hose->io_resource.flags = IORESOURCE_IO;
820 hose->pci_mem_offset = 0;
821 hose->first_busno = 0;
822 hose->last_busno = 0xef;
823 hose->mem_resources[0].name = np->full_name;
824 hose->mem_resources[0].start = 0x80000000;
825 hose->mem_resources[0].end = 0xefffffff;
826 hose->mem_resources[0].flags = IORESOURCE_MEM;
832 else if (u4_pcie != NULL)
836 DBG("U3/4 has no AGP/PCIE, using full resource range\n");
840 /* Fixup bus range vs. PCIE */
842 hose->last_busno = u4_pcie->first_busno - 1;
844 /* We "remove" the AGP resources from the resources allocated to HT,
845 * that is we create "holes". However, that code does assumptions
846 * that so far happen to be true (cross fingers...), typically that
847 * resources in the AGP node are properly ordered
850 for (i=0; i<3; i++) {
851 struct resource *res = &other->mem_resources[i];
852 if (res->flags != IORESOURCE_MEM)
854 /* We don't care about "fine" resources */
855 if (res->start >= 0xf0000000)
857 /* Check if it's just a matter of "shrinking" us in one
860 if (hose->mem_resources[cur].start == res->start) {
861 DBG("U3/HT: shrink start of %d, %08lx -> %08lx\n",
862 cur, hose->mem_resources[cur].start,
864 hose->mem_resources[cur].start = res->end + 1;
867 if (hose->mem_resources[cur].end == res->end) {
868 DBG("U3/HT: shrink end of %d, %08lx -> %08lx\n",
869 cur, hose->mem_resources[cur].end,
871 hose->mem_resources[cur].end = res->start - 1;
874 /* No, it's not the case, we need a hole */
876 /* not enough resources for a hole, we drop part
879 printk(KERN_WARNING "Running out of resources"
880 " for /ht host !\n");
881 hose->mem_resources[cur].end = res->start - 1;
885 DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
886 cur-1, res->start - 1, cur, res->end + 1);
887 hose->mem_resources[cur].name = np->full_name;
888 hose->mem_resources[cur].flags = IORESOURCE_MEM;
889 hose->mem_resources[cur].start = res->end + 1;
890 hose->mem_resources[cur].end = hose->mem_resources[cur-1].end;
891 hose->mem_resources[cur-1].end = res->start - 1;
894 #endif /* CONFIG_PPC64 */
897 * We assume that if we have a G3 powermac, we have one bridge called
898 * "pci" (a MPC106) and no bandit or chaos bridges, and contrariwise,
899 * if we have one or more bandit or chaos bridges, we don't have a MPC106.
901 static int __init add_bridge(struct device_node *dev)
904 struct pci_controller *hose;
905 struct resource rsrc;
907 const int *bus_range;
908 int primary = 1, has_address = 0;
910 DBG("Adding PCI host bridge %s\n", dev->full_name);
912 /* Fetch host bridge registers address */
913 has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
915 /* Get bus range if any */
916 bus_range = get_property(dev, "bus-range", &len);
917 if (bus_range == NULL || len < 2 * sizeof(int)) {
918 printk(KERN_WARNING "Can't get bus-range for %s, assume"
919 " bus 0\n", dev->full_name);
922 /* XXX Different prototypes, to be merged */
924 hose = pcibios_alloc_controller(dev);
926 hose = pcibios_alloc_controller();
930 hose->arch_data = dev;
931 hose->first_busno = bus_range ? bus_range[0] : 0;
932 hose->last_busno = bus_range ? bus_range[1] : 0xff;
936 /* 64 bits only bridges */
938 if (device_is_compatible(dev, "u3-agp")) {
940 disp_name = "U3-AGP";
942 } else if (device_is_compatible(dev, "u3-ht")) {
946 } else if (device_is_compatible(dev, "u4-pcie")) {
948 disp_name = "U4-PCIE";
951 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number:"
952 " %d->%d\n", disp_name, hose->first_busno, hose->last_busno);
953 #endif /* CONFIG_PPC64 */
955 /* 32 bits only bridges */
957 if (device_is_compatible(dev, "uni-north")) {
958 primary = setup_uninorth(hose, &rsrc);
959 disp_name = "UniNorth";
960 } else if (strcmp(dev->name, "pci") == 0) {
961 /* XXX assume this is a mpc106 (grackle) */
963 disp_name = "Grackle (MPC106)";
964 } else if (strcmp(dev->name, "bandit") == 0) {
965 setup_bandit(hose, &rsrc);
966 disp_name = "Bandit";
967 } else if (strcmp(dev->name, "chaos") == 0) {
968 setup_chaos(hose, &rsrc);
972 printk(KERN_INFO "Found %s PCI host bridge at 0x%016llx. "
973 "Firmware bus number: %d->%d\n",
974 disp_name, (unsigned long long)rsrc.start, hose->first_busno,
976 #endif /* CONFIG_PPC32 */
978 DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
979 hose, hose->cfg_addr, hose->cfg_data);
981 /* Interpret the "ranges" property */
982 /* This also maps the I/O region and sets isa_io/mem_base */
983 pci_process_bridge_OF_ranges(hose, dev, primary);
985 /* Fixup "bus-range" OF property */
986 fixup_bus_range(dev);
991 void __init pmac_pcibios_fixup(void)
993 struct pci_dev* dev = NULL;
995 for_each_pci_dev(dev) {
996 /* Read interrupt from the device-tree */
997 pci_read_irq_line(dev);
999 /* Fixup interrupt for the modem/ethernet combo controller.
1000 * on machines with a second ohare chip.
1001 * The number in the device tree (27) is bogus (correct for
1002 * the ethernet-only board but not the combo ethernet/modem
1003 * board). The real interrupt is 28 on the second controller
1006 if (has_second_ohare &&
1007 dev->vendor == PCI_VENDOR_ID_DEC &&
1008 dev->device == PCI_DEVICE_ID_DEC_TULIP_PLUS)
1009 dev->irq = irq_create_mapping(NULL, 60, 0);
1014 static void __init pmac_fixup_phb_resources(void)
1016 struct pci_controller *hose, *tmp;
1018 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
1019 printk(KERN_INFO "PCI Host %d, io start: %lx; io end: %lx\n",
1020 hose->global_number,
1021 hose->io_resource.start, hose->io_resource.end);
1026 void __init pmac_pci_init(void)
1028 struct device_node *np, *root;
1029 struct device_node *ht = NULL;
1031 root = of_find_node_by_path("/");
1033 printk(KERN_CRIT "pmac_pci_init: can't find root "
1034 "of device tree\n");
1037 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
1038 if (np->name == NULL)
1040 if (strcmp(np->name, "bandit") == 0
1041 || strcmp(np->name, "chaos") == 0
1042 || strcmp(np->name, "pci") == 0) {
1043 if (add_bridge(np) == 0)
1046 if (strcmp(np->name, "ht") == 0) {
1054 /* Probe HT last as it relies on the agp resources to be already
1057 if (ht && add_bridge(ht) != 0)
1061 * We need to call pci_setup_phb_io for the HT bridge first
1062 * so it gets the I/O port numbers starting at 0, and we
1063 * need to call it for the AGP bridge after that so it gets
1064 * small positive I/O port numbers.
1067 pci_setup_phb_io(u3_ht, 1);
1069 pci_setup_phb_io(u3_agp, 0);
1071 pci_setup_phb_io(u4_pcie, 0);
1074 * On ppc64, fixup the IO resources on our host bridges as
1075 * the common code does it only for children of the host bridges
1077 pmac_fixup_phb_resources();
1079 /* Setup the linkage between OF nodes and PHBs */
1080 pci_devs_phb_init();
1082 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
1083 * assume there is no P2P bridge on the AGP bus, which should be a
1084 * safe assumptions for now. We should do something better in the
1088 struct device_node *np = u3_agp->arch_data;
1089 PCI_DN(np)->busno = 0xf0;
1090 for (np = np->child; np; np = np->sibling)
1091 PCI_DN(np)->busno = 0xf0;
1093 /* pmac_check_ht_link(); */
1095 /* Tell pci.c to not use the common resource allocation mechanism */
1098 #else /* CONFIG_PPC64 */
1100 init_second_ohare();
1103 /* We are still having some issues with the Xserve G4, enabling
1104 * some offset between bus number and domains for now when we
1105 * assign all busses should help for now
1107 if (pci_assign_all_buses)
1108 pcibios_assign_bus_offset = 0x10;
1113 pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
1115 struct device_node* node;
1119 node = pci_device_to_OF_node(dev);
1121 /* We don't want to enable USB controllers absent from the OF tree
1122 * (iBook second controller)
1124 if (dev->vendor == PCI_VENDOR_ID_APPLE
1125 && dev->class == PCI_CLASS_SERIAL_USB_OHCI
1127 printk(KERN_INFO "Apple USB OHCI %s disabled by firmware\n",
1135 uninorth_child = node->parent &&
1136 device_is_compatible(node->parent, "uni-north");
1138 /* Firewire & GMAC were disabled after PCI probe, the driver is
1139 * claiming them, we must re-enable them now.
1141 if (uninorth_child && !strcmp(node->name, "firewire") &&
1142 (device_is_compatible(node, "pci106b,18") ||
1143 device_is_compatible(node, "pci106b,30") ||
1144 device_is_compatible(node, "pci11c1,5811"))) {
1145 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, node, 0, 1);
1146 pmac_call_feature(PMAC_FTR_1394_ENABLE, node, 0, 1);
1149 if (uninorth_child && !strcmp(node->name, "ethernet") &&
1150 device_is_compatible(node, "gmac")) {
1151 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, node, 0, 1);
1159 * Make sure PCI is correctly configured
1161 * We use old pci_bios versions of the function since, by
1162 * default, gmac is not powered up, and so will be absent
1163 * from the kernel initial PCI lookup.
1165 * Should be replaced by 2.4 new PCI mechanisms and really
1166 * register the device.
1168 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1169 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1170 | PCI_COMMAND_INVALIDATE;
1171 pci_write_config_word(dev, PCI_COMMAND, cmd);
1172 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 16);
1173 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
1174 L1_CACHE_BYTES >> 2);
1180 /* We power down some devices after they have been probed. They'll
1181 * be powered back on later on
1183 void __init pmac_pcibios_after_init(void)
1185 struct device_node* nd;
1187 #ifdef CONFIG_BLK_DEV_IDE
1188 struct pci_dev *dev = NULL;
1190 /* OF fails to initialize IDE controllers on macs
1191 * (and maybe other machines)
1193 * Ideally, this should be moved to the IDE layer, but we need
1194 * to check specifically with Andre Hedrick how to do it cleanly
1195 * since the common IDE code seem to care about the fact that the
1196 * BIOS may have disabled a controller.
1200 for_each_pci_dev(dev) {
1201 if ((dev->class >> 16) == PCI_BASE_CLASS_STORAGE)
1202 pci_enable_device(dev);
1204 #endif /* CONFIG_BLK_DEV_IDE */
1206 nd = find_devices("firewire");
1208 if (nd->parent && (device_is_compatible(nd, "pci106b,18") ||
1209 device_is_compatible(nd, "pci106b,30") ||
1210 device_is_compatible(nd, "pci11c1,5811"))
1211 && device_is_compatible(nd->parent, "uni-north")) {
1212 pmac_call_feature(PMAC_FTR_1394_ENABLE, nd, 0, 0);
1213 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, nd, 0, 0);
1217 nd = find_devices("ethernet");
1219 if (nd->parent && device_is_compatible(nd, "gmac")
1220 && device_is_compatible(nd->parent, "uni-north"))
1221 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, nd, 0, 0);
1227 void pmac_pci_fixup_cardbus(struct pci_dev* dev)
1229 if (!machine_is(powermac))
1232 * Fix the interrupt routing on the various cardbus bridges
1233 * used on powerbooks
1235 if (dev->vendor != PCI_VENDOR_ID_TI)
1237 if (dev->device == PCI_DEVICE_ID_TI_1130 ||
1238 dev->device == PCI_DEVICE_ID_TI_1131) {
1240 /* Enable PCI interrupt */
1241 if (pci_read_config_byte(dev, 0x91, &val) == 0)
1242 pci_write_config_byte(dev, 0x91, val | 0x30);
1243 /* Disable ISA interrupt mode */
1244 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1245 pci_write_config_byte(dev, 0x92, val & ~0x06);
1247 if (dev->device == PCI_DEVICE_ID_TI_1210 ||
1248 dev->device == PCI_DEVICE_ID_TI_1211 ||
1249 dev->device == PCI_DEVICE_ID_TI_1410 ||
1250 dev->device == PCI_DEVICE_ID_TI_1510) {
1252 /* 0x8c == TI122X_IRQMUX, 2 says to route the INTA
1253 signal out the MFUNC0 pin */
1254 if (pci_read_config_byte(dev, 0x8c, &val) == 0)
1255 pci_write_config_byte(dev, 0x8c, (val & ~0x0f) | 2);
1256 /* Disable ISA interrupt mode */
1257 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1258 pci_write_config_byte(dev, 0x92, val & ~0x06);
1262 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus);
1264 void pmac_pci_fixup_pciata(struct pci_dev* dev)
1269 * On PowerMacs, we try to switch any PCI ATA controller to
1272 if (!machine_is(powermac))
1275 /* Some controllers don't have the class IDE */
1276 if (dev->vendor == PCI_VENDOR_ID_PROMISE)
1277 switch(dev->device) {
1278 case PCI_DEVICE_ID_PROMISE_20246:
1279 case PCI_DEVICE_ID_PROMISE_20262:
1280 case PCI_DEVICE_ID_PROMISE_20263:
1281 case PCI_DEVICE_ID_PROMISE_20265:
1282 case PCI_DEVICE_ID_PROMISE_20267:
1283 case PCI_DEVICE_ID_PROMISE_20268:
1284 case PCI_DEVICE_ID_PROMISE_20269:
1285 case PCI_DEVICE_ID_PROMISE_20270:
1286 case PCI_DEVICE_ID_PROMISE_20271:
1287 case PCI_DEVICE_ID_PROMISE_20275:
1288 case PCI_DEVICE_ID_PROMISE_20276:
1289 case PCI_DEVICE_ID_PROMISE_20277:
1292 /* Others, check PCI class */
1293 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
1296 pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
1297 if ((progif & 5) != 5) {
1298 printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n",
1300 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
1301 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
1303 printk(KERN_ERR "Rewrite of PROGIF failed !\n");
1306 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
1310 * Disable second function on K2-SATA, it's broken
1311 * and disable IO BARs on first one
1313 static void fixup_k2_sata(struct pci_dev* dev)
1318 if (PCI_FUNC(dev->devfn) > 0) {
1319 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1320 cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
1321 pci_write_config_word(dev, PCI_COMMAND, cmd);
1322 for (i = 0; i < 6; i++) {
1323 dev->resource[i].start = dev->resource[i].end = 0;
1324 dev->resource[i].flags = 0;
1325 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1329 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1330 cmd &= ~PCI_COMMAND_IO;
1331 pci_write_config_word(dev, PCI_COMMAND, cmd);
1332 for (i = 0; i < 5; i++) {
1333 dev->resource[i].start = dev->resource[i].end = 0;
1334 dev->resource[i].flags = 0;
1335 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1340 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, 0x0240, fixup_k2_sata);