5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 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/irq.h>
20 #include <asm/sections.h>
23 #include <asm/pci-bridge.h>
24 #include <asm/machdep.h>
25 #include <asm/iommu.h>
26 #include <asm/ppc-pci.h>
27 #include <asm/isa-bridge.h>
32 #define DBG(x...) printk(x)
37 static struct pci_controller *u3_agp, *u3_ht, *u4_pcie;
39 static int __init fixup_one_level_bus_range(struct device_node *node, int higher)
41 for (; node != 0;node = node->sibling) {
43 const unsigned int *class_code;
46 /* For PCI<->PCI bridges or CardBus bridges, we go down */
47 class_code = of_get_property(node, "class-code", NULL);
48 if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
49 (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
51 bus_range = of_get_property(node, "bus-range", &len);
52 if (bus_range != NULL && len > 2 * sizeof(int)) {
53 if (bus_range[1] > higher)
54 higher = bus_range[1];
56 higher = fixup_one_level_bus_range(node->child, higher);
61 /* This routine fixes the "bus-range" property of all bridges in the
62 * system since they tend to have their "last" member wrong on macs
64 * Note that the bus numbers manipulated here are OF bus numbers, they
65 * are not Linux bus numbers.
67 static void __init fixup_bus_range(struct device_node *bridge)
70 struct property *prop;
73 /* Lookup the "bus-range" property for the hose */
74 prop = of_find_property(bridge, "bus-range", &len);
75 if (prop == NULL || prop->value == NULL || len < 2 * sizeof(int)) {
76 printk(KERN_WARNING "Can't get bus-range for %s\n",
80 bus_range = prop->value;
81 bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
85 static unsigned long u3_agp_cfa0(u8 devfn, u8 off)
87 return (1 << (unsigned long)PCI_SLOT(devfn)) |
88 ((unsigned long)PCI_FUNC(devfn) << 8) |
89 ((unsigned long)off & 0xFCUL);
92 static unsigned long u3_agp_cfa1(u8 bus, u8 devfn, u8 off)
94 return ((unsigned long)bus << 16) |
95 ((unsigned long)devfn << 8) |
96 ((unsigned long)off & 0xFCUL) |
100 static volatile void __iomem *u3_agp_cfg_access(struct pci_controller* hose,
101 u8 bus, u8 dev_fn, u8 offset)
105 if (bus == hose->first_busno) {
106 if (dev_fn < (11 << 3))
108 caddr = u3_agp_cfa0(dev_fn, offset);
110 caddr = u3_agp_cfa1(bus, dev_fn, offset);
112 /* Uninorth will return garbage if we don't read back the value ! */
114 out_le32(hose->cfg_addr, caddr);
115 } while (in_le32(hose->cfg_addr) != caddr);
118 return hose->cfg_data + offset;
121 static int u3_agp_read_config(struct pci_bus *bus, unsigned int devfn,
122 int offset, int len, u32 *val)
124 struct pci_controller *hose;
125 volatile void __iomem *addr;
127 hose = pci_bus_to_host(bus);
129 return PCIBIOS_DEVICE_NOT_FOUND;
131 addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
133 return PCIBIOS_DEVICE_NOT_FOUND;
135 * Note: the caller has already checked that offset is
136 * suitably aligned and that len is 1, 2 or 4.
143 *val = in_le16(addr);
146 *val = in_le32(addr);
149 return PCIBIOS_SUCCESSFUL;
152 static int u3_agp_write_config(struct pci_bus *bus, unsigned int devfn,
153 int offset, int len, u32 val)
155 struct pci_controller *hose;
156 volatile void __iomem *addr;
158 hose = pci_bus_to_host(bus);
160 return PCIBIOS_DEVICE_NOT_FOUND;
162 addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
164 return PCIBIOS_DEVICE_NOT_FOUND;
166 * Note: the caller has already checked that offset is
167 * suitably aligned and that len is 1, 2 or 4.
180 return PCIBIOS_SUCCESSFUL;
183 static struct pci_ops u3_agp_pci_ops =
185 .read = u3_agp_read_config,
186 .write = u3_agp_write_config,
189 static unsigned long u3_ht_cfa0(u8 devfn, u8 off)
191 return (devfn << 8) | off;
194 static unsigned long u3_ht_cfa1(u8 bus, u8 devfn, u8 off)
196 return u3_ht_cfa0(devfn, off) + (bus << 16) + 0x01000000UL;
199 static volatile void __iomem *u3_ht_cfg_access(struct pci_controller* hose,
200 u8 bus, u8 devfn, u8 offset)
202 if (bus == hose->first_busno) {
203 if (PCI_SLOT(devfn) == 0)
205 return hose->cfg_data + u3_ht_cfa0(devfn, offset);
207 return hose->cfg_data + u3_ht_cfa1(bus, devfn, offset);
210 static int u3_ht_root_read_config(struct pci_controller *hose, u8 offset,
213 volatile void __iomem *addr;
215 addr = hose->cfg_addr;
216 addr += ((offset & ~3) << 2) + (4 - len - (offset & 3));
223 *val = in_be16(addr);
226 *val = in_be32(addr);
230 return PCIBIOS_SUCCESSFUL;
233 static int u3_ht_root_write_config(struct pci_controller *hose, u8 offset,
236 volatile void __iomem *addr;
238 addr = hose->cfg_addr + ((offset & ~3) << 2) + (4 - len - (offset & 3));
240 if (offset >= PCI_BASE_ADDRESS_0 && offset < PCI_CAPABILITY_LIST)
241 return PCIBIOS_SUCCESSFUL;
255 return PCIBIOS_SUCCESSFUL;
258 static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
259 int offset, int len, u32 *val)
261 struct pci_controller *hose;
262 volatile void __iomem *addr;
264 hose = pci_bus_to_host(bus);
266 return PCIBIOS_DEVICE_NOT_FOUND;
268 if (bus->number == hose->first_busno && devfn == PCI_DEVFN(0, 0))
269 return u3_ht_root_read_config(hose, offset, len, val);
272 return PCIBIOS_BAD_REGISTER_NUMBER;
274 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
276 return PCIBIOS_DEVICE_NOT_FOUND;
279 * Note: the caller has already checked that offset is
280 * suitably aligned and that len is 1, 2 or 4.
287 *val = in_le16(addr);
290 *val = in_le32(addr);
293 return PCIBIOS_SUCCESSFUL;
296 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
297 int offset, int len, u32 val)
299 struct pci_controller *hose;
300 volatile void __iomem *addr;
302 hose = pci_bus_to_host(bus);
304 return PCIBIOS_DEVICE_NOT_FOUND;
306 if (bus->number == hose->first_busno && devfn == PCI_DEVFN(0, 0))
307 return u3_ht_root_write_config(hose, offset, len, val);
310 return PCIBIOS_BAD_REGISTER_NUMBER;
312 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
314 return PCIBIOS_DEVICE_NOT_FOUND;
316 * Note: the caller has already checked that offset is
317 * suitably aligned and that len is 1, 2 or 4.
330 return PCIBIOS_SUCCESSFUL;
333 static struct pci_ops u3_ht_pci_ops =
335 .read = u3_ht_read_config,
336 .write = u3_ht_write_config,
339 static unsigned int u4_pcie_cfa0(unsigned int devfn, unsigned int off)
341 return (1 << PCI_SLOT(devfn)) |
342 (PCI_FUNC(devfn) << 8) |
347 static unsigned int u4_pcie_cfa1(unsigned int bus, unsigned int devfn,
356 static volatile void __iomem *u4_pcie_cfg_access(struct pci_controller* hose,
357 u8 bus, u8 dev_fn, int offset)
361 if (bus == hose->first_busno)
362 caddr = u4_pcie_cfa0(dev_fn, offset);
364 caddr = u4_pcie_cfa1(bus, dev_fn, offset);
366 /* Uninorth will return garbage if we don't read back the value ! */
368 out_le32(hose->cfg_addr, caddr);
369 } while (in_le32(hose->cfg_addr) != caddr);
372 return hose->cfg_data + offset;
375 static int u4_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
376 int offset, int len, u32 *val)
378 struct pci_controller *hose;
379 volatile void __iomem *addr;
381 hose = pci_bus_to_host(bus);
383 return PCIBIOS_DEVICE_NOT_FOUND;
384 if (offset >= 0x1000)
385 return PCIBIOS_BAD_REGISTER_NUMBER;
386 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
388 return PCIBIOS_DEVICE_NOT_FOUND;
390 * Note: the caller has already checked that offset is
391 * suitably aligned and that len is 1, 2 or 4.
398 *val = in_le16(addr);
401 *val = in_le32(addr);
404 return PCIBIOS_SUCCESSFUL;
406 static int u4_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
407 int offset, int len, u32 val)
409 struct pci_controller *hose;
410 volatile void __iomem *addr;
412 hose = pci_bus_to_host(bus);
414 return PCIBIOS_DEVICE_NOT_FOUND;
415 if (offset >= 0x1000)
416 return PCIBIOS_BAD_REGISTER_NUMBER;
417 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
419 return PCIBIOS_DEVICE_NOT_FOUND;
421 * Note: the caller has already checked that offset is
422 * suitably aligned and that len is 1, 2 or 4.
435 return PCIBIOS_SUCCESSFUL;
438 static struct pci_ops u4_pcie_pci_ops =
440 .read = u4_pcie_read_config,
441 .write = u4_pcie_write_config,
444 static void __init setup_u3_agp(struct pci_controller* hose)
446 /* On G5, we move AGP up to high bus number so we don't need
447 * to reassign bus numbers for HT. If we ever have P2P bridges
448 * on AGP, we'll have to move pci_assign_all_buses to the
449 * pci_controller structure so we enable it for AGP and not for
451 * We hard code the address because of the different size of
452 * the reg address cell, we shall fix that by killing struct
453 * reg_property and using some accessor functions instead
455 hose->first_busno = 0xf0;
456 hose->last_busno = 0xff;
457 hose->ops = &u3_agp_pci_ops;
458 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
459 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
464 static void __init setup_u4_pcie(struct pci_controller* hose)
466 /* We currently only implement the "non-atomic" config space, to
467 * be optimised later.
469 hose->ops = &u4_pcie_pci_ops;
470 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
471 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
476 static void __init setup_u3_ht(struct pci_controller* hose)
478 hose->ops = &u3_ht_pci_ops;
480 /* We hard code the address because of the different size of
481 * the reg address cell, we shall fix that by killing struct
482 * reg_property and using some accessor functions instead
484 hose->cfg_data = ioremap(0xf2000000, 0x02000000);
485 hose->cfg_addr = ioremap(0xf8070000, 0x1000);
487 hose->first_busno = 0;
488 hose->last_busno = 0xef;
493 static int __init maple_add_bridge(struct device_node *dev)
496 struct pci_controller *hose;
498 const int *bus_range;
501 DBG("Adding PCI host bridge %s\n", dev->full_name);
503 bus_range = of_get_property(dev, "bus-range", &len);
504 if (bus_range == NULL || len < 2 * sizeof(int)) {
505 printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
509 hose = pcibios_alloc_controller(dev);
512 hose->first_busno = bus_range ? bus_range[0] : 0;
513 hose->last_busno = bus_range ? bus_range[1] : 0xff;
514 hose->controller_ops = maple_pci_controller_ops;
517 if (of_device_is_compatible(dev, "u3-agp")) {
519 disp_name = "U3-AGP";
521 } else if (of_device_is_compatible(dev, "u3-ht")) {
525 } else if (of_device_is_compatible(dev, "u4-pcie")) {
527 disp_name = "U4-PCIE";
530 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number: %d->%d\n",
531 disp_name, hose->first_busno, hose->last_busno);
533 /* Interpret the "ranges" property */
534 /* This also maps the I/O region and sets isa_io/mem_base */
535 pci_process_bridge_OF_ranges(hose, dev, primary);
537 /* Fixup "bus-range" OF property */
538 fixup_bus_range(dev);
540 /* Check for legacy IOs */
541 isa_bridge_find_early(hose);
547 void maple_pci_irq_fixup(struct pci_dev *dev)
549 DBG(" -> maple_pci_irq_fixup\n");
551 /* Fixup IRQ for PCIe host */
552 if (u4_pcie != NULL && dev->bus->number == 0 &&
553 pci_bus_to_host(dev->bus) == u4_pcie) {
554 printk(KERN_DEBUG "Fixup U4 PCIe IRQ\n");
555 dev->irq = irq_create_mapping(NULL, 1);
557 irq_set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
560 /* Hide AMD8111 IDE interrupt when in legacy mode so
561 * the driver calls pci_get_legacy_ide_irq()
563 if (dev->vendor == PCI_VENDOR_ID_AMD &&
564 dev->device == PCI_DEVICE_ID_AMD_8111_IDE &&
565 (dev->class & 5) != 5) {
569 DBG(" <- maple_pci_irq_fixup\n");
572 static int maple_pci_root_bridge_prepare(struct pci_host_bridge *bridge)
574 struct pci_controller *hose = pci_bus_to_host(bridge->bus);
575 struct device_node *np, *child;
580 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
581 * assume there is no P2P bridge on the AGP bus, which should be a
582 * safe assumptions hopefully.
585 PCI_DN(np)->busno = 0xf0;
586 for_each_child_of_node(np, child)
587 PCI_DN(child)->busno = 0xf0;
592 void __init maple_pci_init(void)
594 struct device_node *np, *root;
595 struct device_node *ht = NULL;
597 /* Probe root PCI hosts, that is on U3 the AGP host and the
598 * HyperTransport host. That one is actually "kept" around
599 * and actually added last as it's resource management relies
600 * on the AGP resources to have been setup first
602 root = of_find_node_by_path("/");
604 printk(KERN_CRIT "maple_find_bridges: can't find root of device tree\n");
607 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
610 if (strcmp(np->type, "pci") && strcmp(np->type, "ht"))
612 if ((of_device_is_compatible(np, "u4-pcie") ||
613 of_device_is_compatible(np, "u3-agp")) &&
614 maple_add_bridge(np) == 0)
617 if (of_device_is_compatible(np, "u3-ht")) {
624 /* Now setup the HyperTransport host if we found any
626 if (ht && maple_add_bridge(ht) != 0)
629 ppc_md.pcibios_root_bridge_prepare = maple_pci_root_bridge_prepare;
631 /* Tell pci.c to not change any resource allocations. */
632 pci_add_flags(PCI_PROBE_ONLY);
635 int maple_pci_get_legacy_ide_irq(struct pci_dev *pdev, int channel)
637 struct device_node *np;
638 unsigned int defirq = channel ? 15 : 14;
641 if (pdev->vendor != PCI_VENDOR_ID_AMD ||
642 pdev->device != PCI_DEVICE_ID_AMD_8111_IDE)
645 np = pci_device_to_OF_node(pdev);
647 printk("Failed to locate OF node for IDE %s\n",
651 irq = irq_of_parse_and_map(np, channel & 0x1);
653 printk("Failed to map onboard IDE interrupt for channel %d\n",
660 static void quirk_ipr_msi(struct pci_dev *dev)
662 /* Something prevents MSIs from the IPR from working on Bimini,
663 * and the driver has no smarts to recover. So disable MSI
666 if (machine_is(maple)) {
668 dev_info(&dev->dev, "Quirk disabled MSI\n");
671 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN,
674 struct pci_controller_ops maple_pci_controller_ops = {