2 * Support for PCI bridges found on Power Macintoshes.
4 * Copyright (C) 2003 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 *u3_ht;
48 #endif /* CONFIG_PPC64 */
50 extern u8 pci_cache_line_size;
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) {
69 unsigned int *class_code;
72 /* For PCI<->PCI bridges or CardBus bridges, we go down */
73 class_code = (unsigned int *) 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 = (int *) 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)
98 /* Lookup the "bus-range" property for the hose */
99 bus_range = (int *) get_property(bridge, "bus-range", &len);
100 if (bus_range == NULL || len < 2 * sizeof(int)) {
101 printk(KERN_WARNING "Can't get bus-range for %s\n",
105 bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
109 * Apple MacRISC (U3, UniNorth, Bandit, Chaos) PCI controllers.
111 * The "Bandit" version is present in all early PCI PowerMacs,
112 * and up to the first ones using Grackle. Some machines may
113 * have 2 bandit controllers (2 PCI busses).
115 * "Chaos" is used in some "Bandit"-type machines as a bridge
116 * for the separate display bus. It is accessed the same
117 * way as bandit, but cannot be probed for devices. It therefore
118 * has its own config access functions.
120 * The "UniNorth" version is present in all Core99 machines
121 * (iBook, G4, new IMacs, and all the recent Apple machines).
122 * It contains 3 controllers in one ASIC.
124 * The U3 is the bridge used on G5 machines. It contains an
125 * AGP bus which is dealt with the old UniNorth access routines
126 * and a HyperTransport bus which uses its own set of access
130 #define MACRISC_CFA0(devfn, off) \
131 ((1 << (unsigned long)PCI_SLOT(dev_fn)) \
132 | (((unsigned long)PCI_FUNC(dev_fn)) << 8) \
133 | (((unsigned long)(off)) & 0xFCUL))
135 #define MACRISC_CFA1(bus, devfn, off) \
136 ((((unsigned long)(bus)) << 16) \
137 |(((unsigned long)(devfn)) << 8) \
138 |(((unsigned long)(off)) & 0xFCUL) \
141 static unsigned long macrisc_cfg_access(struct pci_controller* hose,
142 u8 bus, u8 dev_fn, u8 offset)
146 if (bus == hose->first_busno) {
147 if (dev_fn < (11 << 3))
149 caddr = MACRISC_CFA0(dev_fn, offset);
151 caddr = MACRISC_CFA1(bus, dev_fn, offset);
153 /* Uninorth will return garbage if we don't read back the value ! */
155 out_le32(hose->cfg_addr, caddr);
156 } while (in_le32(hose->cfg_addr) != caddr);
158 offset &= has_uninorth ? 0x07 : 0x03;
159 return ((unsigned long)hose->cfg_data) + offset;
162 static int macrisc_read_config(struct pci_bus *bus, unsigned int devfn,
163 int offset, int len, u32 *val)
165 struct pci_controller *hose;
168 hose = pci_bus_to_host(bus);
170 return PCIBIOS_DEVICE_NOT_FOUND;
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.
181 *val = in_8((u8 *)addr);
184 *val = in_le16((u16 *)addr);
187 *val = in_le32((u32 *)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;
199 hose = pci_bus_to_host(bus);
201 return PCIBIOS_DEVICE_NOT_FOUND;
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
238 chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
240 struct device_node *np;
241 u32 *vendor, *device;
243 np = pci_busdev_to_OF_node(bus, devfn);
245 return PCIBIOS_DEVICE_NOT_FOUND;
247 vendor = (u32 *)get_property(np, "vendor-id", NULL);
248 device = (u32 *)get_property(np, "device-id", NULL);
249 if (vendor == NULL || device == NULL)
250 return PCIBIOS_DEVICE_NOT_FOUND;
252 if ((*vendor == 0x106b) && (*device == 3) && (offset >= 0x10)
253 && (offset != 0x14) && (offset != 0x18) && (offset <= 0x24))
254 return PCIBIOS_BAD_REGISTER_NUMBER;
256 return PCIBIOS_SUCCESSFUL;
260 chaos_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
263 int result = chaos_validate_dev(bus, devfn, offset);
264 if (result == PCIBIOS_BAD_REGISTER_NUMBER)
266 if (result != PCIBIOS_SUCCESSFUL)
268 return macrisc_read_config(bus, devfn, offset, len, val);
272 chaos_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
275 int result = chaos_validate_dev(bus, devfn, offset);
276 if (result != PCIBIOS_SUCCESSFUL)
278 return macrisc_write_config(bus, devfn, offset, len, val);
281 static struct pci_ops chaos_pci_ops =
287 static void __init setup_chaos(struct pci_controller *hose,
288 struct reg_property *addr)
290 /* assume a `chaos' bridge */
291 hose->ops = &chaos_pci_ops;
292 hose->cfg_addr = ioremap(addr->address + 0x800000, 0x1000);
293 hose->cfg_data = ioremap(addr->address + 0xc00000, 0x1000);
296 #define setup_chaos(hose, addr)
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 (dn->data && 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 long)devfn) << 8) | offset)
347 #define U3_HT_CFA1(bus, devfn, off) \
348 (U3_HT_CFA0(devfn, off) \
349 + (((unsigned long)bus) << 16) \
352 static unsigned long 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 ((unsigned long)hose->cfg_data) + U3_HT_CFA0(devfn, offset);
361 return ((unsigned long)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;
370 hose = pci_bus_to_host(bus);
372 return PCIBIOS_DEVICE_NOT_FOUND;
374 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
376 return PCIBIOS_DEVICE_NOT_FOUND;
378 switch (u3_ht_skip_device(hose, bus, devfn)) {
386 *val = 0xffff; break;
388 *val = 0xfffffffful; break;
390 return PCIBIOS_SUCCESSFUL;
392 return PCIBIOS_DEVICE_NOT_FOUND;
396 * Note: the caller has already checked that offset is
397 * suitably aligned and that len is 1, 2 or 4.
401 *val = in_8((u8 *)addr);
404 *val = in_le16((u16 *)addr);
407 *val = in_le32((u32 *)addr);
410 return PCIBIOS_SUCCESSFUL;
413 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
414 int offset, int len, u32 val)
416 struct pci_controller *hose;
419 hose = pci_bus_to_host(bus);
421 return PCIBIOS_DEVICE_NOT_FOUND;
423 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
425 return PCIBIOS_DEVICE_NOT_FOUND;
427 switch (u3_ht_skip_device(hose, bus, devfn)) {
431 return PCIBIOS_SUCCESSFUL;
433 return PCIBIOS_DEVICE_NOT_FOUND;
437 * Note: the caller has already checked that offset is
438 * suitably aligned and that len is 1, 2 or 4.
442 out_8((u8 *)addr, val);
443 (void) in_8((u8 *)addr);
446 out_le16((u16 *)addr, val);
447 (void) in_le16((u16 *)addr);
450 out_le32((u32 *)addr, val);
451 (void) in_le32((u32 *)addr);
454 return PCIBIOS_SUCCESSFUL;
457 static struct pci_ops u3_ht_pci_ops =
462 #endif /* CONFIG_PPC64 */
466 * For a bandit bridge, turn on cache coherency if necessary.
467 * N.B. we could clean this up using the hose ops directly.
469 static void __init init_bandit(struct pci_controller *bp)
471 unsigned int vendev, magic;
474 /* read the word at offset 0 in config space for device 11 */
475 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_VENDOR_ID);
477 vendev = in_le32(bp->cfg_data);
478 if (vendev == (PCI_DEVICE_ID_APPLE_BANDIT << 16) +
479 PCI_VENDOR_ID_APPLE) {
480 /* read the revision id */
481 out_le32(bp->cfg_addr,
482 (1UL << BANDIT_DEVNUM) + PCI_REVISION_ID);
484 rev = in_8(bp->cfg_data);
485 if (rev != BANDIT_REVID)
487 "Unknown revision %d for bandit\n", rev);
488 } else if (vendev != (BANDIT_DEVID_2 << 16) + PCI_VENDOR_ID_APPLE) {
489 printk(KERN_WARNING "bandit isn't? (%x)\n", vendev);
493 /* read the word at offset 0x50 */
494 out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + BANDIT_MAGIC);
496 magic = in_le32(bp->cfg_data);
497 if ((magic & BANDIT_COHERENT) != 0)
499 magic |= BANDIT_COHERENT;
501 out_le32(bp->cfg_data, magic);
502 printk(KERN_INFO "Cache coherency enabled for bandit/PSX\n");
506 * Tweak the PCI-PCI bridge chip on the blue & white G3s.
508 static void __init init_p2pbridge(void)
510 struct device_node *p2pbridge;
511 struct pci_controller* hose;
515 /* XXX it would be better here to identify the specific
516 PCI-PCI bridge chip we have. */
517 if ((p2pbridge = find_devices("pci-bridge")) == 0
518 || p2pbridge->parent == NULL
519 || strcmp(p2pbridge->parent->name, "pci") != 0)
521 if (pci_device_from_OF_node(p2pbridge, &bus, &devfn) < 0) {
522 DBG("Can't find PCI infos for PCI<->PCI bridge\n");
525 /* Warning: At this point, we have not yet renumbered all busses.
526 * So we must use OF walking to find out hose
528 hose = pci_find_hose_for_OF_device(p2pbridge);
530 DBG("Can't find hose for PCI<->PCI bridge\n");
533 if (early_read_config_word(hose, bus, devfn,
534 PCI_BRIDGE_CONTROL, &val) < 0) {
535 printk(KERN_ERR "init_p2pbridge: couldn't read bridge control\n");
538 val &= ~PCI_BRIDGE_CTL_MASTER_ABORT;
539 early_write_config_word(hose, bus, devfn, PCI_BRIDGE_CONTROL, val);
543 * Some Apple desktop machines have a NEC PD720100A USB2 controller
544 * on the motherboard. Open Firmware, on these, will disable the
545 * EHCI part of it so it behaves like a pair of OHCI's. This fixup
546 * code re-enables it ;)
548 static void __init fixup_nec_usb2(void)
550 struct device_node *nec;
552 for (nec = NULL; (nec = of_find_node_by_name(nec, "usb")) != NULL;) {
553 struct pci_controller *hose;
557 prop = (u32 *)get_property(nec, "vendor-id", NULL);
562 prop = (u32 *)get_property(nec, "device-id", NULL);
567 prop = (u32 *)get_property(nec, "reg", NULL);
570 devfn = (prop[0] >> 8) & 0xff;
571 bus = (prop[0] >> 16) & 0xff;
572 if (PCI_FUNC(devfn) != 0)
574 hose = pci_find_hose_for_OF_device(nec);
577 early_read_config_dword(hose, bus, devfn, 0xe4, &data);
579 printk("Found NEC PD720100A USB2 chip with disabled EHCI, fixing up...\n");
581 early_write_config_dword(hose, bus, devfn, 0xe4, data);
582 early_write_config_byte(hose, bus, devfn | 2, PCI_INTERRUPT_LINE,
588 static void __init setup_bandit(struct pci_controller *hose,
589 struct reg_property *addr)
591 hose->ops = ¯isc_pci_ops;
592 hose->cfg_addr = ioremap(addr->address + 0x800000, 0x1000);
593 hose->cfg_data = ioremap(addr->address + 0xc00000, 0x1000);
597 static int __init setup_uninorth(struct pci_controller *hose,
598 struct reg_property *addr)
600 pci_assign_all_buses = 1;
602 hose->ops = ¯isc_pci_ops;
603 hose->cfg_addr = ioremap(addr->address + 0x800000, 0x1000);
604 hose->cfg_data = ioremap(addr->address + 0xc00000, 0x1000);
605 /* We "know" that the bridge at f2000000 has the PCI slots. */
606 return addr->address == 0xf2000000;
611 static void __init setup_u3_agp(struct pci_controller* hose)
613 /* On G5, we move AGP up to high bus number so we don't need
614 * to reassign bus numbers for HT. If we ever have P2P bridges
615 * on AGP, we'll have to move pci_assign_all_busses to the
616 * pci_controller structure so we enable it for AGP and not for
618 * We hard code the address because of the different size of
619 * the reg address cell, we shall fix that by killing struct
620 * reg_property and using some accessor functions instead
622 hose->first_busno = 0xf0;
623 hose->last_busno = 0xff;
625 hose->ops = ¯isc_pci_ops;
626 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
627 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
632 static void __init setup_u3_ht(struct pci_controller* hose)
634 struct device_node *np = (struct device_node *)hose->arch_data;
637 hose->ops = &u3_ht_pci_ops;
639 /* We hard code the address because of the different size of
640 * the reg address cell, we shall fix that by killing struct
641 * reg_property and using some accessor functions instead
643 hose->cfg_data = (volatile unsigned char *)ioremap(0xf2000000, 0x02000000);
646 * /ht node doesn't expose a "ranges" property, so we "remove" regions that
647 * have been allocated to AGP. So far, this version of the code doesn't assign
648 * any of the 0xfxxxxxxx "fine" memory regions to /ht.
649 * We need to fix that sooner or later by either parsing all child "ranges"
650 * properties or figuring out the U3 address space decoding logic and
651 * then read its configuration register (if any).
653 hose->io_base_phys = 0xf4000000;
654 hose->pci_io_size = 0x00400000;
655 hose->io_resource.name = np->full_name;
656 hose->io_resource.start = 0;
657 hose->io_resource.end = 0x003fffff;
658 hose->io_resource.flags = IORESOURCE_IO;
659 hose->pci_mem_offset = 0;
660 hose->first_busno = 0;
661 hose->last_busno = 0xef;
662 hose->mem_resources[0].name = np->full_name;
663 hose->mem_resources[0].start = 0x80000000;
664 hose->mem_resources[0].end = 0xefffffff;
665 hose->mem_resources[0].flags = IORESOURCE_MEM;
669 if (u3_agp == NULL) {
670 DBG("U3 has no AGP, using full resource range\n");
674 /* We "remove" the AGP resources from the resources allocated to HT, that
675 * is we create "holes". However, that code does assumptions that so far
676 * happen to be true (cross fingers...), typically that resources in the
677 * AGP node are properly ordered
680 for (i=0; i<3; i++) {
681 struct resource *res = &u3_agp->mem_resources[i];
682 if (res->flags != IORESOURCE_MEM)
684 /* We don't care about "fine" resources */
685 if (res->start >= 0xf0000000)
687 /* Check if it's just a matter of "shrinking" us in one direction */
688 if (hose->mem_resources[cur].start == res->start) {
689 DBG("U3/HT: shrink start of %d, %08lx -> %08lx\n",
690 cur, hose->mem_resources[cur].start, res->end + 1);
691 hose->mem_resources[cur].start = res->end + 1;
694 if (hose->mem_resources[cur].end == res->end) {
695 DBG("U3/HT: shrink end of %d, %08lx -> %08lx\n",
696 cur, hose->mem_resources[cur].end, res->start - 1);
697 hose->mem_resources[cur].end = res->start - 1;
700 /* No, it's not the case, we need a hole */
702 /* not enough resources for a hole, we drop part of the range */
703 printk(KERN_WARNING "Running out of resources for /ht host !\n");
704 hose->mem_resources[cur].end = res->start - 1;
708 DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
709 cur-1, res->start - 1, cur, res->end + 1);
710 hose->mem_resources[cur].name = np->full_name;
711 hose->mem_resources[cur].flags = IORESOURCE_MEM;
712 hose->mem_resources[cur].start = res->end + 1;
713 hose->mem_resources[cur].end = hose->mem_resources[cur-1].end;
714 hose->mem_resources[cur-1].end = res->start - 1;
718 /* XXX this needs to be converged between ppc32 and ppc64... */
719 static struct pci_controller * __init pcibios_alloc_controller(void)
721 struct pci_controller *hose;
723 hose = alloc_bootmem(sizeof(struct pci_controller));
725 pci_setup_pci_controller(hose);
731 * We assume that if we have a G3 powermac, we have one bridge called
732 * "pci" (a MPC106) and no bandit or chaos bridges, and contrariwise,
733 * if we have one or more bandit or chaos bridges, we don't have a MPC106.
735 static int __init add_bridge(struct device_node *dev)
738 struct pci_controller *hose;
740 struct reg_property *addr;
746 DBG("Adding PCI host bridge %s\n", dev->full_name);
750 addr = (struct reg_property *) get_property(dev, "reg", &len);
751 if (addr == NULL || len < sizeof(*addr)) {
752 printk(KERN_WARNING "Can't use %s: no address\n",
757 bus_range = (int *) get_property(dev, "bus-range", &len);
758 if (bus_range == NULL || len < 2 * sizeof(int)) {
759 printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
763 hose = pcibios_alloc_controller();
766 hose->arch_data = dev;
767 hose->first_busno = bus_range ? bus_range[0] : 0;
768 hose->last_busno = bus_range ? bus_range[1] : 0xff;
772 if (device_is_compatible(dev, "u3-agp")) {
774 disp_name = "U3-AGP";
776 } else if (device_is_compatible(dev, "u3-ht")) {
781 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number: %d->%d\n",
782 disp_name, hose->first_busno, hose->last_busno);
784 if (device_is_compatible(dev, "uni-north")) {
785 primary = setup_uninorth(hose, addr);
786 disp_name = "UniNorth";
787 } else if (strcmp(dev->name, "pci") == 0) {
788 /* XXX assume this is a mpc106 (grackle) */
790 disp_name = "Grackle (MPC106)";
791 } else if (strcmp(dev->name, "bandit") == 0) {
792 setup_bandit(hose, addr);
793 disp_name = "Bandit";
794 } else if (strcmp(dev->name, "chaos") == 0) {
795 setup_chaos(hose, addr);
799 printk(KERN_INFO "Found %s PCI host bridge at 0x%08lx. Firmware bus number: %d->%d\n",
800 disp_name, addr->address, hose->first_busno, hose->last_busno);
802 DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
803 hose, hose->cfg_addr, hose->cfg_data);
805 /* Interpret the "ranges" property */
806 /* This also maps the I/O region and sets isa_io/mem_base */
807 pci_process_bridge_OF_ranges(hose, dev, primary);
809 /* Fixup "bus-range" OF property */
810 fixup_bus_range(dev);
816 pcibios_fixup_OF_interrupts(void)
818 struct pci_dev* dev = NULL;
821 * Open Firmware often doesn't initialize the
822 * PCI_INTERRUPT_LINE config register properly, so we
823 * should find the device node and apply the interrupt
824 * obtained from the OF device-tree
826 for_each_pci_dev(dev) {
827 struct device_node *node;
828 node = pci_device_to_OF_node(dev);
829 /* this is the node, see if it has interrupts */
830 if (node && node->n_intrs > 0)
831 dev->irq = node->intrs[0].line;
832 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
837 pmac_pcibios_fixup(void)
839 /* Fixup interrupts according to OF tree */
840 pcibios_fixup_OF_interrupts();
844 static void __init pmac_fixup_phb_resources(void)
846 struct pci_controller *hose, *tmp;
848 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
849 printk(KERN_INFO "PCI Host %d, io start: %lx; io end: %lx\n",
851 hose->io_resource.start, hose->io_resource.end);
856 void __init pmac_pci_init(void)
858 struct device_node *np, *root;
859 struct device_node *ht = NULL;
861 root = of_find_node_by_path("/");
863 printk(KERN_CRIT "pmac_pci_init: can't find root "
867 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
868 if (np->name == NULL)
870 if (strcmp(np->name, "bandit") == 0
871 || strcmp(np->name, "chaos") == 0
872 || strcmp(np->name, "pci") == 0) {
873 if (add_bridge(np) == 0)
876 if (strcmp(np->name, "ht") == 0) {
884 /* Probe HT last as it relies on the agp resources to be already
887 if (ht && add_bridge(ht) != 0)
891 * We need to call pci_setup_phb_io for the HT bridge first
892 * so it gets the I/O port numbers starting at 0, and we
893 * need to call it for the AGP bridge after that so it gets
894 * small positive I/O port numbers.
897 pci_setup_phb_io(u3_ht, 1);
899 pci_setup_phb_io(u3_agp, 0);
902 * On ppc64, fixup the IO resources on our host bridges as
903 * the common code does it only for children of the host bridges
905 pmac_fixup_phb_resources();
907 /* Setup the linkage between OF nodes and PHBs */
910 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
911 * assume there is no P2P bridge on the AGP bus, which should be a
912 * safe assumptions hopefully.
915 struct device_node *np = u3_agp->arch_data;
916 PCI_DN(np)->busno = 0xf0;
917 for (np = np->child; np; np = np->sibling)
918 PCI_DN(np)->busno = 0xf0;
921 /* map in PCI I/O space */
924 /* pmac_check_ht_link(); */
926 /* Tell pci.c to not use the common resource allocation mechanism */
932 #else /* CONFIG_PPC64 */
936 /* We are still having some issues with the Xserve G4, enabling
937 * some offset between bus number and domains for now when we
938 * assign all busses should help for now
940 if (pci_assign_all_buses)
941 pcibios_assign_bus_offset = 0x10;
946 pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
948 struct device_node* node;
952 node = pci_device_to_OF_node(dev);
954 /* We don't want to enable USB controllers absent from the OF tree
955 * (iBook second controller)
957 if (dev->vendor == PCI_VENDOR_ID_APPLE
958 && (dev->class == ((PCI_CLASS_SERIAL_USB << 8) | 0x10))
960 printk(KERN_INFO "Apple USB OHCI %s disabled by firmware\n",
968 uninorth_child = node->parent &&
969 device_is_compatible(node->parent, "uni-north");
971 /* Firewire & GMAC were disabled after PCI probe, the driver is
972 * claiming them, we must re-enable them now.
974 if (uninorth_child && !strcmp(node->name, "firewire") &&
975 (device_is_compatible(node, "pci106b,18") ||
976 device_is_compatible(node, "pci106b,30") ||
977 device_is_compatible(node, "pci11c1,5811"))) {
978 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, node, 0, 1);
979 pmac_call_feature(PMAC_FTR_1394_ENABLE, node, 0, 1);
982 if (uninorth_child && !strcmp(node->name, "ethernet") &&
983 device_is_compatible(node, "gmac")) {
984 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, node, 0, 1);
992 * Make sure PCI is correctly configured
994 * We use old pci_bios versions of the function since, by
995 * default, gmac is not powered up, and so will be absent
996 * from the kernel initial PCI lookup.
998 * Should be replaced by 2.4 new PCI mechanisms and really
999 * register the device.
1001 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1002 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1003 | PCI_COMMAND_INVALIDATE;
1004 pci_write_config_word(dev, PCI_COMMAND, cmd);
1005 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 16);
1006 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
1007 L1_CACHE_BYTES >> 2);
1013 /* We power down some devices after they have been probed. They'll
1014 * be powered back on later on
1016 void __init pmac_pcibios_after_init(void)
1018 struct device_node* nd;
1020 #ifdef CONFIG_BLK_DEV_IDE
1021 struct pci_dev *dev = NULL;
1023 /* OF fails to initialize IDE controllers on macs
1024 * (and maybe other machines)
1026 * Ideally, this should be moved to the IDE layer, but we need
1027 * to check specifically with Andre Hedrick how to do it cleanly
1028 * since the common IDE code seem to care about the fact that the
1029 * BIOS may have disabled a controller.
1033 for_each_pci_dev(dev) {
1034 if ((dev->class >> 16) == PCI_BASE_CLASS_STORAGE)
1035 pci_enable_device(dev);
1037 #endif /* CONFIG_BLK_DEV_IDE */
1039 nd = find_devices("firewire");
1041 if (nd->parent && (device_is_compatible(nd, "pci106b,18") ||
1042 device_is_compatible(nd, "pci106b,30") ||
1043 device_is_compatible(nd, "pci11c1,5811"))
1044 && device_is_compatible(nd->parent, "uni-north")) {
1045 pmac_call_feature(PMAC_FTR_1394_ENABLE, nd, 0, 0);
1046 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, nd, 0, 0);
1050 nd = find_devices("ethernet");
1052 if (nd->parent && device_is_compatible(nd, "gmac")
1053 && device_is_compatible(nd->parent, "uni-north"))
1054 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, nd, 0, 0);
1060 void pmac_pci_fixup_cardbus(struct pci_dev* dev)
1062 if (_machine != _MACH_Pmac)
1065 * Fix the interrupt routing on the various cardbus bridges
1066 * used on powerbooks
1068 if (dev->vendor != PCI_VENDOR_ID_TI)
1070 if (dev->device == PCI_DEVICE_ID_TI_1130 ||
1071 dev->device == PCI_DEVICE_ID_TI_1131) {
1073 /* Enable PCI interrupt */
1074 if (pci_read_config_byte(dev, 0x91, &val) == 0)
1075 pci_write_config_byte(dev, 0x91, val | 0x30);
1076 /* Disable ISA interrupt mode */
1077 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1078 pci_write_config_byte(dev, 0x92, val & ~0x06);
1080 if (dev->device == PCI_DEVICE_ID_TI_1210 ||
1081 dev->device == PCI_DEVICE_ID_TI_1211 ||
1082 dev->device == PCI_DEVICE_ID_TI_1410 ||
1083 dev->device == PCI_DEVICE_ID_TI_1510) {
1085 /* 0x8c == TI122X_IRQMUX, 2 says to route the INTA
1086 signal out the MFUNC0 pin */
1087 if (pci_read_config_byte(dev, 0x8c, &val) == 0)
1088 pci_write_config_byte(dev, 0x8c, (val & ~0x0f) | 2);
1089 /* Disable ISA interrupt mode */
1090 if (pci_read_config_byte(dev, 0x92, &val) == 0)
1091 pci_write_config_byte(dev, 0x92, val & ~0x06);
1095 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus);
1097 void pmac_pci_fixup_pciata(struct pci_dev* dev)
1102 * On PowerMacs, we try to switch any PCI ATA controller to
1105 if (_machine != _MACH_Pmac)
1107 /* Some controllers don't have the class IDE */
1108 if (dev->vendor == PCI_VENDOR_ID_PROMISE)
1109 switch(dev->device) {
1110 case PCI_DEVICE_ID_PROMISE_20246:
1111 case PCI_DEVICE_ID_PROMISE_20262:
1112 case PCI_DEVICE_ID_PROMISE_20263:
1113 case PCI_DEVICE_ID_PROMISE_20265:
1114 case PCI_DEVICE_ID_PROMISE_20267:
1115 case PCI_DEVICE_ID_PROMISE_20268:
1116 case PCI_DEVICE_ID_PROMISE_20269:
1117 case PCI_DEVICE_ID_PROMISE_20270:
1118 case PCI_DEVICE_ID_PROMISE_20271:
1119 case PCI_DEVICE_ID_PROMISE_20275:
1120 case PCI_DEVICE_ID_PROMISE_20276:
1121 case PCI_DEVICE_ID_PROMISE_20277:
1124 /* Others, check PCI class */
1125 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
1128 pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
1129 if ((progif & 5) != 5) {
1130 printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n", pci_name(dev));
1131 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
1132 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
1134 printk(KERN_ERR "Rewrite of PROGIF failed !\n");
1137 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
1141 * Disable second function on K2-SATA, it's broken
1142 * and disable IO BARs on first one
1144 static void fixup_k2_sata(struct pci_dev* dev)
1149 if (PCI_FUNC(dev->devfn) > 0) {
1150 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1151 cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
1152 pci_write_config_word(dev, PCI_COMMAND, cmd);
1153 for (i = 0; i < 6; i++) {
1154 dev->resource[i].start = dev->resource[i].end = 0;
1155 dev->resource[i].flags = 0;
1156 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, 0);
1159 pci_read_config_word(dev, PCI_COMMAND, &cmd);
1160 cmd &= ~PCI_COMMAND_IO;
1161 pci_write_config_word(dev, PCI_COMMAND, cmd);
1162 for (i = 0; i < 5; i++) {
1163 dev->resource[i].start = dev->resource[i].end = 0;
1164 dev->resource[i].flags = 0;
1165 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, 0);
1169 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, 0x0240, fixup_k2_sata);