2 * Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org),
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/bootmem.h>
19 #include <linux/irq.h>
21 #include <asm/sections.h>
24 #include <asm/pci-bridge.h>
25 #include <asm/machdep.h>
26 #include <asm/iommu.h>
27 #include <asm/ppc-pci.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_read_config(struct pci_bus *bus, unsigned int devfn,
211 int offset, int len, u32 *val)
213 struct pci_controller *hose;
214 volatile void __iomem *addr;
216 hose = pci_bus_to_host(bus);
218 return PCIBIOS_DEVICE_NOT_FOUND;
221 return PCIBIOS_BAD_REGISTER_NUMBER;
223 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
225 return PCIBIOS_DEVICE_NOT_FOUND;
228 * Note: the caller has already checked that offset is
229 * suitably aligned and that len is 1, 2 or 4.
236 *val = in_le16(addr);
239 *val = in_le32(addr);
242 return PCIBIOS_SUCCESSFUL;
245 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
246 int offset, int len, u32 val)
248 struct pci_controller *hose;
249 volatile void __iomem *addr;
251 hose = pci_bus_to_host(bus);
253 return PCIBIOS_DEVICE_NOT_FOUND;
256 return PCIBIOS_BAD_REGISTER_NUMBER;
258 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
260 return PCIBIOS_DEVICE_NOT_FOUND;
262 * Note: the caller has already checked that offset is
263 * suitably aligned and that len is 1, 2 or 4.
276 return PCIBIOS_SUCCESSFUL;
279 static struct pci_ops u3_ht_pci_ops =
281 .read = u3_ht_read_config,
282 .write = u3_ht_write_config,
285 static unsigned int u4_pcie_cfa0(unsigned int devfn, unsigned int off)
287 return (1 << PCI_SLOT(devfn)) |
288 (PCI_FUNC(devfn) << 8) |
293 static unsigned int u4_pcie_cfa1(unsigned int bus, unsigned int devfn,
302 static volatile void __iomem *u4_pcie_cfg_access(struct pci_controller* hose,
303 u8 bus, u8 dev_fn, int offset)
307 if (bus == hose->first_busno)
308 caddr = u4_pcie_cfa0(dev_fn, offset);
310 caddr = u4_pcie_cfa1(bus, dev_fn, offset);
312 /* Uninorth will return garbage if we don't read back the value ! */
314 out_le32(hose->cfg_addr, caddr);
315 } while (in_le32(hose->cfg_addr) != caddr);
318 return hose->cfg_data + offset;
321 static int u4_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
322 int offset, int len, u32 *val)
324 struct pci_controller *hose;
325 volatile void __iomem *addr;
327 hose = pci_bus_to_host(bus);
329 return PCIBIOS_DEVICE_NOT_FOUND;
330 if (offset >= 0x1000)
331 return PCIBIOS_BAD_REGISTER_NUMBER;
332 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
334 return PCIBIOS_DEVICE_NOT_FOUND;
336 * Note: the caller has already checked that offset is
337 * suitably aligned and that len is 1, 2 or 4.
344 *val = in_le16(addr);
347 *val = in_le32(addr);
350 return PCIBIOS_SUCCESSFUL;
352 static int u4_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
353 int offset, int len, u32 val)
355 struct pci_controller *hose;
356 volatile void __iomem *addr;
358 hose = pci_bus_to_host(bus);
360 return PCIBIOS_DEVICE_NOT_FOUND;
361 if (offset >= 0x1000)
362 return PCIBIOS_BAD_REGISTER_NUMBER;
363 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
365 return PCIBIOS_DEVICE_NOT_FOUND;
367 * Note: the caller has already checked that offset is
368 * suitably aligned and that len is 1, 2 or 4.
381 return PCIBIOS_SUCCESSFUL;
384 static struct pci_ops u4_pcie_pci_ops =
386 .read = u4_pcie_read_config,
387 .write = u4_pcie_write_config,
390 static void __init setup_u3_agp(struct pci_controller* hose)
392 /* On G5, we move AGP up to high bus number so we don't need
393 * to reassign bus numbers for HT. If we ever have P2P bridges
394 * on AGP, we'll have to move pci_assign_all_buses to the
395 * pci_controller structure so we enable it for AGP and not for
397 * We hard code the address because of the different size of
398 * the reg address cell, we shall fix that by killing struct
399 * reg_property and using some accessor functions instead
401 hose->first_busno = 0xf0;
402 hose->last_busno = 0xff;
403 hose->ops = &u3_agp_pci_ops;
404 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
405 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
410 static void __init setup_u4_pcie(struct pci_controller* hose)
412 /* We currently only implement the "non-atomic" config space, to
413 * be optimised later.
415 hose->ops = &u4_pcie_pci_ops;
416 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
417 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
422 static void __init setup_u3_ht(struct pci_controller* hose)
424 hose->ops = &u3_ht_pci_ops;
426 /* We hard code the address because of the different size of
427 * the reg address cell, we shall fix that by killing struct
428 * reg_property and using some accessor functions instead
430 hose->cfg_data = ioremap(0xf2000000, 0x02000000);
432 hose->first_busno = 0;
433 hose->last_busno = 0xef;
438 static int __init maple_add_bridge(struct device_node *dev)
441 struct pci_controller *hose;
443 const int *bus_range;
446 DBG("Adding PCI host bridge %s\n", dev->full_name);
448 bus_range = of_get_property(dev, "bus-range", &len);
449 if (bus_range == NULL || len < 2 * sizeof(int)) {
450 printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
454 hose = pcibios_alloc_controller(dev);
457 hose->first_busno = bus_range ? bus_range[0] : 0;
458 hose->last_busno = bus_range ? bus_range[1] : 0xff;
461 if (of_device_is_compatible(dev, "u3-agp")) {
463 disp_name = "U3-AGP";
465 } else if (of_device_is_compatible(dev, "u3-ht")) {
469 } else if (of_device_is_compatible(dev, "u4-pcie")) {
471 disp_name = "U4-PCIE";
474 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number: %d->%d\n",
475 disp_name, hose->first_busno, hose->last_busno);
477 /* Interpret the "ranges" property */
478 /* This also maps the I/O region and sets isa_io/mem_base */
479 pci_process_bridge_OF_ranges(hose, dev, primary);
481 /* Fixup "bus-range" OF property */
482 fixup_bus_range(dev);
484 /* Check for legacy IOs */
485 isa_bridge_find_early(hose);
491 void __devinit maple_pci_irq_fixup(struct pci_dev *dev)
493 DBG(" -> maple_pci_irq_fixup\n");
495 /* Fixup IRQ for PCIe host */
496 if (u4_pcie != NULL && dev->bus->number == 0 &&
497 pci_bus_to_host(dev->bus) == u4_pcie) {
498 printk(KERN_DEBUG "Fixup U4 PCIe IRQ\n");
499 dev->irq = irq_create_mapping(NULL, 1);
500 if (dev->irq != NO_IRQ)
501 set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
504 /* Hide AMD8111 IDE interrupt when in legacy mode so
505 * the driver calls pci_get_legacy_ide_irq()
507 if (dev->vendor == PCI_VENDOR_ID_AMD &&
508 dev->device == PCI_DEVICE_ID_AMD_8111_IDE &&
509 (dev->class & 5) != 5) {
513 DBG(" <- maple_pci_irq_fixup\n");
516 void __init maple_pci_init(void)
518 struct device_node *np, *root;
519 struct device_node *ht = NULL;
521 /* Probe root PCI hosts, that is on U3 the AGP host and the
522 * HyperTransport host. That one is actually "kept" around
523 * and actually added last as it's resource management relies
524 * on the AGP resources to have been setup first
526 root = of_find_node_by_path("/");
528 printk(KERN_CRIT "maple_find_bridges: can't find root of device tree\n");
531 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
534 if (strcmp(np->type, "pci") && strcmp(np->type, "ht"))
536 if ((of_device_is_compatible(np, "u4-pcie") ||
537 of_device_is_compatible(np, "u3-agp")) &&
538 maple_add_bridge(np) == 0)
541 if (of_device_is_compatible(np, "u3-ht")) {
548 /* Now setup the HyperTransport host if we found any
550 if (ht && maple_add_bridge(ht) != 0)
553 /* Setup the linkage between OF nodes and PHBs */
556 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
557 * assume there is no P2P bridge on the AGP bus, which should be a
558 * safe assumptions hopefully.
561 struct device_node *np = u3_agp->dn;
562 PCI_DN(np)->busno = 0xf0;
563 for (np = np->child; np; np = np->sibling)
564 PCI_DN(np)->busno = 0xf0;
567 /* Tell pci.c to not change any resource allocations. */
571 int maple_pci_get_legacy_ide_irq(struct pci_dev *pdev, int channel)
573 struct device_node *np;
574 unsigned int defirq = channel ? 15 : 14;
577 if (pdev->vendor != PCI_VENDOR_ID_AMD ||
578 pdev->device != PCI_DEVICE_ID_AMD_8111_IDE)
581 np = pci_device_to_OF_node(pdev);
583 printk("Failed to locate OF node for IDE %s\n",
587 irq = irq_of_parse_and_map(np, channel & 0x1);
589 printk("Failed to map onboard IDE interrupt for channel %d\n",
596 /* XXX: To remove once all firmwares are ok */
597 static void fixup_maple_ide(struct pci_dev* dev)
599 if (!machine_is(maple))
602 #if 0 /* Enable this to enable IDE port 0 */
606 pci_read_config_byte(dev, 0x40, &v);
608 pci_write_config_byte(dev, 0x40, v);
611 #if 0 /* fix bus master base */
612 pci_write_config_dword(dev, 0x20, 0xcc01);
613 printk("old ide resource: %lx -> %lx \n",
614 dev->resource[4].start, dev->resource[4].end);
615 dev->resource[4].start = 0xcc00;
616 dev->resource[4].end = 0xcc10;
618 #if 0 /* Enable this to fixup IDE sense/polarity of irqs in IO-APICs */
620 struct pci_dev *apicdev;
623 apicdev = pci_get_slot (dev->bus, PCI_DEVFN(5,0));
625 printk("IDE Fixup IRQ: Can't find IO-APIC !\n");
627 pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*14);
628 pci_read_config_dword(apicdev, 0xf4, &v);
630 pci_write_config_dword(apicdev, 0xf4, v);
631 pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*15);
632 pci_read_config_dword(apicdev, 0xf4, &v);
634 pci_write_config_dword(apicdev, 0xf4, v);
635 pci_dev_put(apicdev);
640 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_IDE,