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 #endif /* CONFIG_PPC64 */
51 extern u8 pci_cache_line_size;
52 extern int pcibios_assign_bus_offset;
54 struct device_node *k2_skiplist[2];
57 * Magic constants for enabling cache coherency in the bandit/PSX bridge.
59 #define BANDIT_DEVID_2 8
60 #define BANDIT_REVID 3
62 #define BANDIT_DEVNUM 11
63 #define BANDIT_MAGIC 0x50
64 #define BANDIT_COHERENT 0x40
66 static int __init fixup_one_level_bus_range(struct device_node *node, int higher)
68 for (; node != 0;node = node->sibling) {
70 unsigned int *class_code;
73 /* For PCI<->PCI bridges or CardBus bridges, we go down */
74 class_code = (unsigned int *) get_property(node, "class-code", NULL);
75 if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
76 (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
78 bus_range = (int *) get_property(node, "bus-range", &len);
79 if (bus_range != NULL && len > 2 * sizeof(int)) {
80 if (bus_range[1] > higher)
81 higher = bus_range[1];
83 higher = fixup_one_level_bus_range(node->child, higher);
88 /* This routine fixes the "bus-range" property of all bridges in the
89 * system since they tend to have their "last" member wrong on macs
91 * Note that the bus numbers manipulated here are OF bus numbers, they
92 * are not Linux bus numbers.
94 static void __init fixup_bus_range(struct device_node *bridge)
99 /* Lookup the "bus-range" property for the hose */
100 bus_range = (int *) get_property(bridge, "bus-range", &len);
101 if (bus_range == NULL || len < 2 * sizeof(int))
103 bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
107 * Apple MacRISC (U3, UniNorth, Bandit, Chaos) PCI controllers.
109 * The "Bandit" version is present in all early PCI PowerMacs,
110 * and up to the first ones using Grackle. Some machines may
111 * have 2 bandit controllers (2 PCI busses).
113 * "Chaos" is used in some "Bandit"-type machines as a bridge
114 * for the separate display bus. It is accessed the same
115 * way as bandit, but cannot be probed for devices. It therefore
116 * has its own config access functions.
118 * The "UniNorth" version is present in all Core99 machines
119 * (iBook, G4, new IMacs, and all the recent Apple machines).
120 * It contains 3 controllers in one ASIC.
122 * The U3 is the bridge used on G5 machines. It contains an
123 * AGP bus which is dealt with the old UniNorth access routines
124 * and a HyperTransport bus which uses its own set of access
128 #define MACRISC_CFA0(devfn, off) \
129 ((1 << (unsigned int)PCI_SLOT(dev_fn)) \
130 | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
131 | (((unsigned int)(off)) & 0xFCUL))
133 #define MACRISC_CFA1(bus, devfn, off) \
134 ((((unsigned int)(bus)) << 16) \
135 |(((unsigned int)(devfn)) << 8) \
136 |(((unsigned int)(off)) & 0xFCUL) \
139 static unsigned long macrisc_cfg_access(struct pci_controller* hose,
140 u8 bus, u8 dev_fn, u8 offset)
144 if (bus == hose->first_busno) {
145 if (dev_fn < (11 << 3))
147 caddr = MACRISC_CFA0(dev_fn, offset);
149 caddr = MACRISC_CFA1(bus, dev_fn, offset);
151 /* Uninorth will return garbage if we don't read back the value ! */
153 out_le32(hose->cfg_addr, caddr);
154 } while (in_le32(hose->cfg_addr) != caddr);
156 offset &= has_uninorth ? 0x07 : 0x03;
157 return ((unsigned long)hose->cfg_data) + offset;
160 static int macrisc_read_config(struct pci_bus *bus, unsigned int devfn,
161 int offset, int len, u32 *val)
163 struct pci_controller *hose;
166 hose = pci_bus_to_host(bus);
168 return PCIBIOS_DEVICE_NOT_FOUND;
170 return PCIBIOS_BAD_REGISTER_NUMBER;
171 addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
173 return PCIBIOS_DEVICE_NOT_FOUND;
175 * Note: the caller has already checked that offset is
176 * suitably aligned and that len is 1, 2 or 4.
180 *val = in_8((u8 *)addr);
183 *val = in_le16((u16 *)addr);
186 *val = in_le32((u32 *)addr);
189 return PCIBIOS_SUCCESSFUL;
192 static int macrisc_write_config(struct pci_bus *bus, unsigned int devfn,
193 int offset, int len, u32 val)
195 struct pci_controller *hose;
198 hose = pci_bus_to_host(bus);
200 return PCIBIOS_DEVICE_NOT_FOUND;
202 return PCIBIOS_BAD_REGISTER_NUMBER;
203 addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
205 return PCIBIOS_DEVICE_NOT_FOUND;
207 * Note: the caller has already checked that offset is
208 * suitably aligned and that len is 1, 2 or 4.
212 out_8((u8 *)addr, val);
213 (void) in_8((u8 *)addr);
216 out_le16((u16 *)addr, val);
217 (void) in_le16((u16 *)addr);
220 out_le32((u32 *)addr, val);
221 (void) in_le32((u32 *)addr);
224 return PCIBIOS_SUCCESSFUL;
227 static struct pci_ops macrisc_pci_ops =
235 * Verify that a specific (bus, dev_fn) exists on chaos
237 static int chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
239 struct device_node *np;
240 u32 *vendor, *device;
243 return PCIBIOS_BAD_REGISTER_NUMBER;
244 np = pci_busdev_to_OF_node(bus, devfn);
246 return PCIBIOS_DEVICE_NOT_FOUND;
248 vendor = (u32 *)get_property(np, "vendor-id", NULL);
249 device = (u32 *)get_property(np, "device-id", NULL);
250 if (vendor == NULL || device == NULL)
251 return PCIBIOS_DEVICE_NOT_FOUND;
253 if ((*vendor == 0x106b) && (*device == 3) && (offset >= 0x10)
254 && (offset != 0x14) && (offset != 0x18) && (offset <= 0x24))
255 return PCIBIOS_BAD_REGISTER_NUMBER;
257 return PCIBIOS_SUCCESSFUL;
261 chaos_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
264 int result = chaos_validate_dev(bus, devfn, offset);
265 if (result == PCIBIOS_BAD_REGISTER_NUMBER)
267 if (result != PCIBIOS_SUCCESSFUL)
269 return macrisc_read_config(bus, devfn, offset, len, val);
273 chaos_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
276 int result = chaos_validate_dev(bus, devfn, offset);
277 if (result != PCIBIOS_SUCCESSFUL)
279 return macrisc_write_config(bus, devfn, offset, len, val);
282 static struct pci_ops chaos_pci_ops =
288 static void __init setup_chaos(struct pci_controller *hose,
289 struct resource *addr)
291 /* assume a `chaos' bridge */
292 hose->ops = &chaos_pci_ops;
293 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
294 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
296 #endif /* CONFIG_PPC32 */
300 * These versions of U3 HyperTransport config space access ops do not
301 * implement self-view of the HT host yet
305 * This function deals with some "special cases" devices.
307 * 0 -> No special case
308 * 1 -> Skip the device but act as if the access was successfull
309 * (return 0xff's on reads, eventually, cache config space
310 * accesses in a later version)
311 * -1 -> Hide the device (unsuccessful acess)
313 static int u3_ht_skip_device(struct pci_controller *hose,
314 struct pci_bus *bus, unsigned int devfn)
316 struct device_node *busdn, *dn;
319 /* We only allow config cycles to devices that are in OF device-tree
320 * as we are apparently having some weird things going on with some
321 * revs of K2 on recent G5s
324 busdn = pci_device_to_OF_node(bus->self);
326 busdn = hose->arch_data;
327 for (dn = busdn->child; dn; dn = dn->sibling)
328 if (PCI_DN(dn) && PCI_DN(dn)->devfn == devfn)
334 * When a device in K2 is powered down, we die on config
335 * cycle accesses. Fix that here.
338 if (k2_skiplist[i] == dn)
344 #define U3_HT_CFA0(devfn, off) \
345 ((((unsigned int)devfn) << 8) | offset)
346 #define U3_HT_CFA1(bus, devfn, off) \
347 (U3_HT_CFA0(devfn, off) \
348 + (((unsigned int)bus) << 16) \
351 static unsigned long u3_ht_cfg_access(struct pci_controller* hose,
352 u8 bus, u8 devfn, u8 offset)
354 if (bus == hose->first_busno) {
355 /* For now, we don't self probe U3 HT bridge */
356 if (PCI_SLOT(devfn) == 0)
358 return ((unsigned long)hose->cfg_data) +
359 U3_HT_CFA0(devfn, offset);
361 return ((unsigned long)hose->cfg_data) +
362 U3_HT_CFA1(bus, devfn, offset);
365 static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
366 int offset, int len, u32 *val)
368 struct pci_controller *hose;
371 hose = pci_bus_to_host(bus);
373 return PCIBIOS_DEVICE_NOT_FOUND;
375 return PCIBIOS_BAD_REGISTER_NUMBER;
376 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
378 return PCIBIOS_DEVICE_NOT_FOUND;
380 switch (u3_ht_skip_device(hose, bus, devfn)) {
388 *val = 0xffff; break;
390 *val = 0xfffffffful; break;
392 return PCIBIOS_SUCCESSFUL;
394 return PCIBIOS_DEVICE_NOT_FOUND;
398 * Note: the caller has already checked that offset is
399 * suitably aligned and that len is 1, 2 or 4.
403 *val = in_8((u8 *)addr);
406 *val = in_le16((u16 *)addr);
409 *val = in_le32((u32 *)addr);
412 return PCIBIOS_SUCCESSFUL;
415 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
416 int offset, int len, u32 val)
418 struct pci_controller *hose;
421 hose = pci_bus_to_host(bus);
423 return PCIBIOS_DEVICE_NOT_FOUND;
425 return PCIBIOS_BAD_REGISTER_NUMBER;
426 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
428 return PCIBIOS_DEVICE_NOT_FOUND;
430 switch (u3_ht_skip_device(hose, bus, devfn)) {
434 return PCIBIOS_SUCCESSFUL;
436 return PCIBIOS_DEVICE_NOT_FOUND;
440 * Note: the caller has already checked that offset is
441 * suitably aligned and that len is 1, 2 or 4.
445 out_8((u8 *)addr, val);
446 (void) in_8((u8 *)addr);
449 out_le16((u16 *)addr, val);
450 (void) in_le16((u16 *)addr);
453 out_le32((u32 *)addr, val);
454 (void) in_le32((u32 *)addr);
457 return PCIBIOS_SUCCESSFUL;
460 static struct pci_ops u3_ht_pci_ops =
466 #define U4_PCIE_CFA0(devfn, off) \
467 ((1 << ((unsigned int)PCI_SLOT(dev_fn))) \
468 | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
469 | ((((unsigned int)(off)) >> 8) << 28) \
470 | (((unsigned int)(off)) & 0xfcU))
472 #define U4_PCIE_CFA1(bus, devfn, off) \
473 ((((unsigned int)(bus)) << 16) \
474 |(((unsigned int)(devfn)) << 8) \
475 | ((((unsigned int)(off)) >> 8) << 28) \
476 |(((unsigned int)(off)) & 0xfcU) \
479 static unsigned long u4_pcie_cfg_access(struct pci_controller* hose,
480 u8 bus, u8 dev_fn, int offset)
484 if (bus == hose->first_busno) {
485 caddr = U4_PCIE_CFA0(dev_fn, offset);
487 caddr = U4_PCIE_CFA1(bus, dev_fn, offset);
489 /* Uninorth will return garbage if we don't read back the value ! */
491 out_le32(hose->cfg_addr, caddr);
492 } while (in_le32(hose->cfg_addr) != caddr);
495 return ((unsigned long)hose->cfg_data) + offset;
498 static int u4_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
499 int offset, int len, u32 *val)
501 struct pci_controller *hose;
504 hose = pci_bus_to_host(bus);
506 return PCIBIOS_DEVICE_NOT_FOUND;
507 if (offset >= 0x1000)
508 return PCIBIOS_BAD_REGISTER_NUMBER;
509 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
511 return PCIBIOS_DEVICE_NOT_FOUND;
513 * Note: the caller has already checked that offset is
514 * suitably aligned and that len is 1, 2 or 4.
518 *val = in_8((u8 *)addr);
521 *val = in_le16((u16 *)addr);
524 *val = in_le32((u32 *)addr);
527 return PCIBIOS_SUCCESSFUL;
530 static int u4_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
531 int offset, int len, u32 val)
533 struct pci_controller *hose;
536 hose = pci_bus_to_host(bus);
538 return PCIBIOS_DEVICE_NOT_FOUND;
539 if (offset >= 0x1000)
540 return PCIBIOS_BAD_REGISTER_NUMBER;
541 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
543 return PCIBIOS_DEVICE_NOT_FOUND;
545 * Note: the caller has already checked that offset is
546 * suitably aligned and that len is 1, 2 or 4.
550 out_8((u8 *)addr, val);
551 (void) in_8((u8 *)addr);
554 out_le16((u16 *)addr, val);
555 (void) in_le16((u16 *)addr);
558 out_le32((u32 *)addr, val);
559 (void) in_le32((u32 *)addr);
562 return PCIBIOS_SUCCESSFUL;
565 static struct pci_ops u4_pcie_pci_ops =
571 #endif /* CONFIG_PPC64 */
575 * For a bandit bridge, turn on cache coherency if necessary.
576 * N.B. we could clean this up using the hose ops directly.
578 static void __init init_bandit(struct pci_controller *bp)
580 unsigned int vendev, magic;
583 /* read the word at offset 0 in config space for device 11 */
584 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_VENDOR_ID);
586 vendev = in_le32(bp->cfg_data);
587 if (vendev == (PCI_DEVICE_ID_APPLE_BANDIT << 16) +
588 PCI_VENDOR_ID_APPLE) {
589 /* read the revision id */
590 out_le32(bp->cfg_addr,
591 (1UL << BANDIT_DEVNUM) + PCI_REVISION_ID);
593 rev = in_8(bp->cfg_data);
594 if (rev != BANDIT_REVID)
596 "Unknown revision %d for bandit\n", rev);
597 } else if (vendev != (BANDIT_DEVID_2 << 16) + PCI_VENDOR_ID_APPLE) {
598 printk(KERN_WARNING "bandit isn't? (%x)\n", vendev);
602 /* read the word at offset 0x50 */
603 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + BANDIT_MAGIC);
605 magic = in_le32(bp->cfg_data);
606 if ((magic & BANDIT_COHERENT) != 0)
608 magic |= BANDIT_COHERENT;
610 out_le32(bp->cfg_data, magic);
611 printk(KERN_INFO "Cache coherency enabled for bandit/PSX\n");
615 * Tweak the PCI-PCI bridge chip on the blue & white G3s.
617 static void __init init_p2pbridge(void)
619 struct device_node *p2pbridge;
620 struct pci_controller* hose;
624 /* XXX it would be better here to identify the specific
625 PCI-PCI bridge chip we have. */
626 if ((p2pbridge = find_devices("pci-bridge")) == 0
627 || p2pbridge->parent == NULL
628 || strcmp(p2pbridge->parent->name, "pci") != 0)
630 if (pci_device_from_OF_node(p2pbridge, &bus, &devfn) < 0) {
631 DBG("Can't find PCI infos for PCI<->PCI bridge\n");
634 /* Warning: At this point, we have not yet renumbered all busses.
635 * So we must use OF walking to find out hose
637 hose = pci_find_hose_for_OF_device(p2pbridge);
639 DBG("Can't find hose for PCI<->PCI bridge\n");
642 if (early_read_config_word(hose, bus, devfn,
643 PCI_BRIDGE_CONTROL, &val) < 0) {
644 printk(KERN_ERR "init_p2pbridge: couldn't read bridge"
648 val &= ~PCI_BRIDGE_CTL_MASTER_ABORT;
649 early_write_config_word(hose, bus, devfn, PCI_BRIDGE_CONTROL, val);
653 * Some Apple desktop machines have a NEC PD720100A USB2 controller
654 * on the motherboard. Open Firmware, on these, will disable the
655 * EHCI part of it so it behaves like a pair of OHCI's. This fixup
656 * code re-enables it ;)
658 static void __init fixup_nec_usb2(void)
660 struct device_node *nec;
662 for (nec = NULL; (nec = of_find_node_by_name(nec, "usb")) != NULL;) {
663 struct pci_controller *hose;
667 prop = (u32 *)get_property(nec, "vendor-id", NULL);
672 prop = (u32 *)get_property(nec, "device-id", NULL);
677 prop = (u32 *)get_property(nec, "reg", NULL);
680 devfn = (prop[0] >> 8) & 0xff;
681 bus = (prop[0] >> 16) & 0xff;
682 if (PCI_FUNC(devfn) != 0)
684 hose = pci_find_hose_for_OF_device(nec);
687 early_read_config_dword(hose, bus, devfn, 0xe4, &data);
689 printk("Found NEC PD720100A USB2 chip with disabled"
690 " EHCI, fixing up...\n");
692 early_write_config_dword(hose, bus, devfn, 0xe4, data);
693 early_write_config_byte(hose, bus,
694 devfn | 2, PCI_INTERRUPT_LINE,
700 static void __init setup_bandit(struct pci_controller *hose,
701 struct resource *addr)
703 hose->ops = ¯isc_pci_ops;
704 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
705 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
709 static int __init setup_uninorth(struct pci_controller *hose,
710 struct resource *addr)
712 pci_assign_all_buses = 1;
714 hose->ops = ¯isc_pci_ops;
715 hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
716 hose->cfg_data = ioremap(addr->start + 0xc00000, 0x1000);
717 /* We "know" that the bridge at f2000000 has the PCI slots. */
718 return addr->start == 0xf2000000;
720 #endif /* CONFIG_PPC32 */
723 static void __init setup_u3_agp(struct pci_controller* hose)
725 /* On G5, we move AGP up to high bus number so we don't need
726 * to reassign bus numbers for HT. If we ever have P2P bridges
727 * on AGP, we'll have to move pci_assign_all_busses to the
728 * pci_controller structure so we enable it for AGP and not for
730 * We hard code the address because of the different size of
731 * the reg address cell, we shall fix that by killing struct
732 * reg_property and using some accessor functions instead
734 hose->first_busno = 0xf0;
735 hose->last_busno = 0xff;
737 hose->ops = ¯isc_pci_ops;
738 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
739 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
743 static void __init setup_u4_pcie(struct pci_controller* hose)
745 /* We currently only implement the "non-atomic" config space, to
746 * be optimised later.
748 hose->ops = &u4_pcie_pci_ops;
749 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
750 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
752 /* The bus contains a bridge from root -> device, we need to
753 * make it visible on bus 0 so that we pick the right type
754 * of config cycles. If we didn't, we would have to force all
755 * config cycles to be type 1. So we override the "bus-range"
758 hose->first_busno = 0x00;
759 hose->last_busno = 0xff;
763 static void __init setup_u3_ht(struct pci_controller* hose)
765 struct device_node *np = (struct device_node *)hose->arch_data;
766 struct pci_controller *other = NULL;
770 hose->ops = &u3_ht_pci_ops;
772 /* We hard code the address because of the different size of
773 * the reg address cell, we shall fix that by killing struct
774 * reg_property and using some accessor functions instead
776 hose->cfg_data = (volatile unsigned char *)ioremap(0xf2000000,
780 * /ht node doesn't expose a "ranges" property, so we "remove"
781 * regions that have been allocated to AGP. So far, this version of
782 * the code doesn't assign any of the 0xfxxxxxxx "fine" memory regions
783 * to /ht. We need to fix that sooner or later by either parsing all
784 * child "ranges" properties or figuring out the U3 address space
785 * decoding logic and then read its configuration register (if any).
787 hose->io_base_phys = 0xf4000000;
788 hose->pci_io_size = 0x00400000;
789 hose->io_resource.name = np->full_name;
790 hose->io_resource.start = 0;
791 hose->io_resource.end = 0x003fffff;
792 hose->io_resource.flags = IORESOURCE_IO;
793 hose->pci_mem_offset = 0;
794 hose->first_busno = 0;
795 hose->last_busno = 0xef;
796 hose->mem_resources[0].name = np->full_name;
797 hose->mem_resources[0].start = 0x80000000;
798 hose->mem_resources[0].end = 0xefffffff;
799 hose->mem_resources[0].flags = IORESOURCE_MEM;
805 else if (u4_pcie != NULL)
809 DBG("U3/4 has no AGP/PCIE, using full resource range\n");
813 /* Fixup bus range vs. PCIE */
815 hose->last_busno = u4_pcie->first_busno - 1;
817 /* We "remove" the AGP resources from the resources allocated to HT,
818 * that is we create "holes". However, that code does assumptions
819 * that so far happen to be true (cross fingers...), typically that
820 * resources in the AGP node are properly ordered
823 for (i=0; i<3; i++) {
824 struct resource *res = &other->mem_resources[i];
825 if (res->flags != IORESOURCE_MEM)
827 /* We don't care about "fine" resources */
828 if (res->start >= 0xf0000000)
830 /* Check if it's just a matter of "shrinking" us in one
833 if (hose->mem_resources[cur].start == res->start) {
834 DBG("U3/HT: shrink start of %d, %08lx -> %08lx\n",
835 cur, hose->mem_resources[cur].start,
837 hose->mem_resources[cur].start = res->end + 1;
840 if (hose->mem_resources[cur].end == res->end) {
841 DBG("U3/HT: shrink end of %d, %08lx -> %08lx\n",
842 cur, hose->mem_resources[cur].end,
844 hose->mem_resources[cur].end = res->start - 1;
847 /* No, it's not the case, we need a hole */
849 /* not enough resources for a hole, we drop part
852 printk(KERN_WARNING "Running out of resources"
853 " for /ht host !\n");
854 hose->mem_resources[cur].end = res->start - 1;
858 DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
859 cur-1, res->start - 1, cur, res->end + 1);
860 hose->mem_resources[cur].name = np->full_name;
861 hose->mem_resources[cur].flags = IORESOURCE_MEM;
862 hose->mem_resources[cur].start = res->end + 1;
863 hose->mem_resources[cur].end = hose->mem_resources[cur-1].end;
864 hose->mem_resources[cur-1].end = res->start - 1;
867 #endif /* CONFIG_PPC64 */
870 * We assume that if we have a G3 powermac, we have one bridge called
871 * "pci" (a MPC106) and no bandit or chaos bridges, and contrariwise,
872 * if we have one or more bandit or chaos bridges, we don't have a MPC106.
874 static int __init add_bridge(struct device_node *dev)
877 struct pci_controller *hose;
878 struct resource rsrc;
881 int primary = 1, has_address = 0;
883 DBG("Adding PCI host bridge %s\n", dev->full_name);
885 /* Fetch host bridge registers address */
886 has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
888 /* Get bus range if any */
889 bus_range = (int *) get_property(dev, "bus-range", &len);
890 if (bus_range == NULL || len < 2 * sizeof(int)) {
891 printk(KERN_WARNING "Can't get bus-range for %s, assume"
892 " bus 0\n", dev->full_name);
895 /* XXX Different prototypes, to be merged */
897 hose = pcibios_alloc_controller(dev);
899 hose = pcibios_alloc_controller();
903 hose->arch_data = dev;
904 hose->first_busno = bus_range ? bus_range[0] : 0;
905 hose->last_busno = bus_range ? bus_range[1] : 0xff;
909 /* 64 bits only bridges */
911 if (device_is_compatible(dev, "u3-agp")) {
913 disp_name = "U3-AGP";
915 } else if (device_is_compatible(dev, "u3-ht")) {
919 } else if (device_is_compatible(dev, "u4-pcie")) {
921 disp_name = "U4-PCIE";
924 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number:"
925 " %d->%d\n", disp_name, hose->first_busno, hose->last_busno);
926 #endif /* CONFIG_PPC64 */
928 /* 32 bits only bridges */
930 if (device_is_compatible(dev, "uni-north")) {
931 primary = setup_uninorth(hose, &rsrc);
932 disp_name = "UniNorth";
933 } else if (strcmp(dev->name, "pci") == 0) {
934 /* XXX assume this is a mpc106 (grackle) */
936 disp_name = "Grackle (MPC106)";
937 } else if (strcmp(dev->name, "bandit") == 0) {
938 setup_bandit(hose, &rsrc);
939 disp_name = "Bandit";
940 } else if (strcmp(dev->name, "chaos") == 0) {
941 setup_chaos(hose, &rsrc);
945 printk(KERN_INFO "Found %s PCI host bridge at 0x%08lx. "
946 "Firmware bus number: %d->%d\n",
947 disp_name, rsrc.start, hose->first_busno, hose->last_busno);
948 #endif /* CONFIG_PPC32 */
950 DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
951 hose, hose->cfg_addr, hose->cfg_data);
953 /* Interpret the "ranges" property */
954 /* This also maps the I/O region and sets isa_io/mem_base */
955 pci_process_bridge_OF_ranges(hose, dev, primary);
957 /* Fixup "bus-range" OF property */
958 fixup_bus_range(dev);
963 static void __init pcibios_fixup_OF_interrupts(void)
965 struct pci_dev* dev = NULL;
968 * Open Firmware often doesn't initialize the
969 * PCI_INTERRUPT_LINE config register properly, so we
970 * should find the device node and apply the interrupt
971 * obtained from the OF device-tree
973 for_each_pci_dev(dev) {
974 struct device_node *node;
975 node = pci_device_to_OF_node(dev);
976 /* this is the node, see if it has interrupts */
977 if (node && node->n_intrs > 0)
978 dev->irq = node->intrs[0].line;
979 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
983 void __init pmac_pcibios_fixup(void)
985 /* Fixup interrupts according to OF tree */
986 pcibios_fixup_OF_interrupts();
990 static void __init pmac_fixup_phb_resources(void)
992 struct pci_controller *hose, *tmp;
994 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
995 printk(KERN_INFO "PCI Host %d, io start: %lx; io end: %lx\n",
997 hose->io_resource.start, hose->io_resource.end);
1002 void __init pmac_pci_init(void)
1004 struct device_node *np, *root;
1005 struct device_node *ht = NULL;
1007 root = of_find_node_by_path("/");
1009 printk(KERN_CRIT "pmac_pci_init: can't find root "
1010 "of device tree\n");
1013 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
1014 if (np->name == NULL)
1016 if (strcmp(np->name, "bandit") == 0
1017 || strcmp(np->name, "chaos") == 0
1018 || strcmp(np->name, "pci") == 0) {
1019 if (add_bridge(np) == 0)
1022 if (strcmp(np->name, "ht") == 0) {
1030 /* Probe HT last as it relies on the agp resources to be already
1033 if (ht && add_bridge(ht) != 0)
1037 * We need to call pci_setup_phb_io for the HT bridge first
1038 * so it gets the I/O port numbers starting at 0, and we
1039 * need to call it for the AGP bridge after that so it gets
1040 * small positive I/O port numbers.
1043 pci_setup_phb_io(u3_ht, 1);
1045 pci_setup_phb_io(u3_agp, 0);
1047 pci_setup_phb_io(u4_pcie, 0);
1050 * On ppc64, fixup the IO resources on our host bridges as
1051 * the common code does it only for children of the host bridges
1053 pmac_fixup_phb_resources();
1055 /* Setup the linkage between OF nodes and PHBs */
1056 pci_devs_phb_init();
1058 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
1059 * assume there is no P2P bridge on the AGP bus, which should be a
1060 * safe assumptions for now. We should do something better in the
1064 struct device_node *np = u3_agp->arch_data;
1065 PCI_DN(np)->busno = 0xf0;
1066 for (np = np->child; np; np = np->sibling)
1067 PCI_DN(np)->busno = 0xf0;
1069 /* pmac_check_ht_link(); */
1071 /* Tell pci.c to not use the common resource allocation mechanism */
1077 #else /* CONFIG_PPC64 */
1081 /* We are still having some issues with the Xserve G4, enabling
1082 * some offset between bus number and domains for now when we
1083 * assign all busses should help for now
1085 if (pci_assign_all_buses)
1086 pcibios_assign_bus_offset = 0x10;
1091 pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
1093 struct device_node* node;
1097 node = pci_device_to_OF_node(dev);
1099 /* We don't want to enable USB controllers absent from the OF tree
1100 * (iBook second controller)
1102 if (dev->vendor == PCI_VENDOR_ID_APPLE
1103 && (dev->class == ((PCI_CLASS_SERIAL_USB << 8) | 0x10))
1105 printk(KERN_INFO "Apple USB OHCI %s disabled by firmware\n",
1113 uninorth_child = node->parent &&
1114 device_is_compatible(node->parent, "uni-north");
1116 /* Firewire & GMAC were disabled after PCI probe, the driver is
1117 * claiming them, we must re-enable them now.
1119 if (uninorth_child && !strcmp(node->name, "firewire") &&
1120 (device_is_compatible(node, "pci106b,18") ||
1121 device_is_compatible(node, "pci106b,30") ||
1122 device_is_compatible(node, "pci11c1,5811"))) {
1123 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, node, 0, 1);
1124 pmac_call_feature(PMAC_FTR_1394_ENABLE, node, 0, 1);
1127 if (uninorth_child && !strcmp(node->name, "ethernet") &&
1128 device_is_compatible(node, "gmac")) {
1129 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, node, 0, 1);
1137 * Make sure PCI is correctly configured
1139 * We use old pci_bios versions of the function since, by
1140 * default, gmac is not powered up, and so will be absent
1141 * from the kernel initial PCI lookup.
1143 * Should be replaced by 2.4 new PCI mechanisms and really
1144 * register the device.
1146 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1147 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1148 | PCI_COMMAND_INVALIDATE;
1149 pci_write_config_word(dev, PCI_COMMAND, cmd);
1150 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 16);
1151 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
1152 L1_CACHE_BYTES >> 2);
1158 /* We power down some devices after they have been probed. They'll
1159 * be powered back on later on
1161 void __init pmac_pcibios_after_init(void)
1163 struct device_node* nd;
1165 #ifdef CONFIG_BLK_DEV_IDE
1166 struct pci_dev *dev = NULL;
1168 /* OF fails to initialize IDE controllers on macs
1169 * (and maybe other machines)
1171 * Ideally, this should be moved to the IDE layer, but we need
1172 * to check specifically with Andre Hedrick how to do it cleanly
1173 * since the common IDE code seem to care about the fact that the
1174 * BIOS may have disabled a controller.
1178 for_each_pci_dev(dev) {
1179 if ((dev->class >> 16) == PCI_BASE_CLASS_STORAGE)
1180 pci_enable_device(dev);
1182 #endif /* CONFIG_BLK_DEV_IDE */
1184 nd = find_devices("firewire");
1186 if (nd->parent && (device_is_compatible(nd, "pci106b,18") ||
1187 device_is_compatible(nd, "pci106b,30") ||
1188 device_is_compatible(nd, "pci11c1,5811"))
1189 && device_is_compatible(nd->parent, "uni-north")) {
1190 pmac_call_feature(PMAC_FTR_1394_ENABLE, nd, 0, 0);
1191 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, nd, 0, 0);
1195 nd = find_devices("ethernet");
1197 if (nd->parent && device_is_compatible(nd, "gmac")
1198 && device_is_compatible(nd->parent, "uni-north"))
1199 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, nd, 0, 0);
1205 void pmac_pci_fixup_cardbus(struct pci_dev* dev)
1207 if (_machine != _MACH_Pmac)
1210 * Fix the interrupt routing on the various cardbus bridges
1211 * used on powerbooks
1213 if (dev->vendor != PCI_VENDOR_ID_TI)
1215 if (dev->device == PCI_DEVICE_ID_TI_1130 ||
1216 dev->device == PCI_DEVICE_ID_TI_1131) {
1218 /* Enable PCI interrupt */
1219 if (pci_read_config_byte(dev, 0x91, &val) == 0)
1220 pci_write_config_byte(dev, 0x91, val | 0x30);
1221 /* Disable ISA interrupt mode */
1222 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1223 pci_write_config_byte(dev, 0x92, val & ~0x06);
1225 if (dev->device == PCI_DEVICE_ID_TI_1210 ||
1226 dev->device == PCI_DEVICE_ID_TI_1211 ||
1227 dev->device == PCI_DEVICE_ID_TI_1410 ||
1228 dev->device == PCI_DEVICE_ID_TI_1510) {
1230 /* 0x8c == TI122X_IRQMUX, 2 says to route the INTA
1231 signal out the MFUNC0 pin */
1232 if (pci_read_config_byte(dev, 0x8c, &val) == 0)
1233 pci_write_config_byte(dev, 0x8c, (val & ~0x0f) | 2);
1234 /* Disable ISA interrupt mode */
1235 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1236 pci_write_config_byte(dev, 0x92, val & ~0x06);
1240 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus);
1242 void pmac_pci_fixup_pciata(struct pci_dev* dev)
1247 * On PowerMacs, we try to switch any PCI ATA controller to
1250 if (_machine != _MACH_Pmac)
1252 /* Some controllers don't have the class IDE */
1253 if (dev->vendor == PCI_VENDOR_ID_PROMISE)
1254 switch(dev->device) {
1255 case PCI_DEVICE_ID_PROMISE_20246:
1256 case PCI_DEVICE_ID_PROMISE_20262:
1257 case PCI_DEVICE_ID_PROMISE_20263:
1258 case PCI_DEVICE_ID_PROMISE_20265:
1259 case PCI_DEVICE_ID_PROMISE_20267:
1260 case PCI_DEVICE_ID_PROMISE_20268:
1261 case PCI_DEVICE_ID_PROMISE_20269:
1262 case PCI_DEVICE_ID_PROMISE_20270:
1263 case PCI_DEVICE_ID_PROMISE_20271:
1264 case PCI_DEVICE_ID_PROMISE_20275:
1265 case PCI_DEVICE_ID_PROMISE_20276:
1266 case PCI_DEVICE_ID_PROMISE_20277:
1269 /* Others, check PCI class */
1270 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
1273 pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
1274 if ((progif & 5) != 5) {
1275 printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n",
1277 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
1278 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
1280 printk(KERN_ERR "Rewrite of PROGIF failed !\n");
1283 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
1287 * Disable second function on K2-SATA, it's broken
1288 * and disable IO BARs on first one
1290 static void fixup_k2_sata(struct pci_dev* dev)
1295 if (PCI_FUNC(dev->devfn) > 0) {
1296 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1297 cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
1298 pci_write_config_word(dev, PCI_COMMAND, cmd);
1299 for (i = 0; i < 6; i++) {
1300 dev->resource[i].start = dev->resource[i].end = 0;
1301 dev->resource[i].flags = 0;
1302 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1306 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1307 cmd &= ~PCI_COMMAND_IO;
1308 pci_write_config_word(dev, PCI_COMMAND, cmd);
1309 for (i = 0; i < 5; i++) {
1310 dev->resource[i].start = dev->resource[i].end = 0;
1311 dev->resource[i].flags = 0;
1312 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
1317 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, 0x0240, fixup_k2_sata);