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 = 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 = 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 = (int *)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.
176 (void) in_le16(addr);
180 (void) in_le32(addr);
183 return PCIBIOS_SUCCESSFUL;
186 static struct pci_ops u3_agp_pci_ops =
192 static unsigned long u3_ht_cfa0(u8 devfn, u8 off)
194 return (devfn << 8) | off;
197 static unsigned long u3_ht_cfa1(u8 bus, u8 devfn, u8 off)
199 return u3_ht_cfa0(devfn, off) + (bus << 16) + 0x01000000UL;
202 static volatile void __iomem *u3_ht_cfg_access(struct pci_controller* hose,
203 u8 bus, u8 devfn, u8 offset)
205 if (bus == hose->first_busno) {
206 if (PCI_SLOT(devfn) == 0)
208 return hose->cfg_data + u3_ht_cfa0(devfn, offset);
210 return hose->cfg_data + u3_ht_cfa1(bus, devfn, offset);
213 static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
214 int offset, int len, u32 *val)
216 struct pci_controller *hose;
217 volatile void __iomem *addr;
219 hose = pci_bus_to_host(bus);
221 return PCIBIOS_DEVICE_NOT_FOUND;
224 return PCIBIOS_BAD_REGISTER_NUMBER;
226 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
228 return PCIBIOS_DEVICE_NOT_FOUND;
231 * Note: the caller has already checked that offset is
232 * suitably aligned and that len is 1, 2 or 4.
239 *val = in_le16(addr);
242 *val = in_le32(addr);
245 return PCIBIOS_SUCCESSFUL;
248 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
249 int offset, int len, u32 val)
251 struct pci_controller *hose;
252 volatile void __iomem *addr;
254 hose = pci_bus_to_host(bus);
256 return PCIBIOS_DEVICE_NOT_FOUND;
259 return PCIBIOS_BAD_REGISTER_NUMBER;
261 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
263 return PCIBIOS_DEVICE_NOT_FOUND;
265 * Note: the caller has already checked that offset is
266 * suitably aligned and that len is 1, 2 or 4.
275 (void) in_le16(addr);
279 (void) in_le32(addr);
282 return PCIBIOS_SUCCESSFUL;
285 static struct pci_ops u3_ht_pci_ops =
291 static unsigned int u4_pcie_cfa0(unsigned int devfn, unsigned int off)
293 return (1 << PCI_SLOT(devfn)) |
294 (PCI_FUNC(devfn) << 8) |
299 static unsigned int u4_pcie_cfa1(unsigned int bus, unsigned int devfn,
308 static volatile void __iomem *u4_pcie_cfg_access(struct pci_controller* hose,
309 u8 bus, u8 dev_fn, int offset)
313 if (bus == hose->first_busno)
314 caddr = u4_pcie_cfa0(dev_fn, offset);
316 caddr = u4_pcie_cfa1(bus, dev_fn, offset);
318 /* Uninorth will return garbage if we don't read back the value ! */
320 out_le32(hose->cfg_addr, caddr);
321 } while (in_le32(hose->cfg_addr) != caddr);
324 return hose->cfg_data + offset;
327 static int u4_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
328 int offset, int len, u32 *val)
330 struct pci_controller *hose;
331 volatile void __iomem *addr;
333 hose = pci_bus_to_host(bus);
335 return PCIBIOS_DEVICE_NOT_FOUND;
336 if (offset >= 0x1000)
337 return PCIBIOS_BAD_REGISTER_NUMBER;
338 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
340 return PCIBIOS_DEVICE_NOT_FOUND;
342 * Note: the caller has already checked that offset is
343 * suitably aligned and that len is 1, 2 or 4.
350 *val = in_le16(addr);
353 *val = in_le32(addr);
356 return PCIBIOS_SUCCESSFUL;
358 static int u4_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
359 int offset, int len, u32 val)
361 struct pci_controller *hose;
362 volatile void __iomem *addr;
364 hose = pci_bus_to_host(bus);
366 return PCIBIOS_DEVICE_NOT_FOUND;
367 if (offset >= 0x1000)
368 return PCIBIOS_BAD_REGISTER_NUMBER;
369 addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
371 return PCIBIOS_DEVICE_NOT_FOUND;
373 * Note: the caller has already checked that offset is
374 * suitably aligned and that len is 1, 2 or 4.
383 (void) in_le16(addr);
387 (void) in_le32(addr);
390 return PCIBIOS_SUCCESSFUL;
393 static struct pci_ops u4_pcie_pci_ops =
399 static void __init setup_u3_agp(struct pci_controller* hose)
401 /* On G5, we move AGP up to high bus number so we don't need
402 * to reassign bus numbers for HT. If we ever have P2P bridges
403 * on AGP, we'll have to move pci_assign_all_buses to the
404 * pci_controller structure so we enable it for AGP and not for
406 * We hard code the address because of the different size of
407 * the reg address cell, we shall fix that by killing struct
408 * reg_property and using some accessor functions instead
410 hose->first_busno = 0xf0;
411 hose->last_busno = 0xff;
412 hose->ops = &u3_agp_pci_ops;
413 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
414 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
419 static void __init setup_u4_pcie(struct pci_controller* hose)
421 /* We currently only implement the "non-atomic" config space, to
422 * be optimised later.
424 hose->ops = &u4_pcie_pci_ops;
425 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
426 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
428 /* The bus contains a bridge from root -> device, we need to
429 * make it visible on bus 0 so that we pick the right type
430 * of config cycles. If we didn't, we would have to force all
431 * config cycles to be type 1. So we override the "bus-range"
434 hose->first_busno = 0x00;
435 hose->last_busno = 0xff;
439 static void __init setup_u3_ht(struct pci_controller* hose)
441 hose->ops = &u3_ht_pci_ops;
443 /* We hard code the address because of the different size of
444 * the reg address cell, we shall fix that by killing struct
445 * reg_property and using some accessor functions instead
447 hose->cfg_data = ioremap(0xf2000000, 0x02000000);
449 hose->first_busno = 0;
450 hose->last_busno = 0xef;
455 static int __init add_bridge(struct device_node *dev)
458 struct pci_controller *hose;
460 const int *bus_range;
463 DBG("Adding PCI host bridge %s\n", dev->full_name);
465 bus_range = get_property(dev, "bus-range", &len);
466 if (bus_range == NULL || len < 2 * sizeof(int)) {
467 printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
471 hose = pcibios_alloc_controller(dev);
474 hose->first_busno = bus_range ? bus_range[0] : 0;
475 hose->last_busno = bus_range ? bus_range[1] : 0xff;
478 if (device_is_compatible(dev, "u3-agp")) {
480 disp_name = "U3-AGP";
482 } else if (device_is_compatible(dev, "u3-ht")) {
486 } else if (device_is_compatible(dev, "u4-pcie")) {
488 disp_name = "U4-PCIE";
491 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number: %d->%d\n",
492 disp_name, hose->first_busno, hose->last_busno);
494 /* Interpret the "ranges" property */
495 /* This also maps the I/O region and sets isa_io/mem_base */
496 pci_process_bridge_OF_ranges(hose, dev, primary);
498 /* Fixup "bus-range" OF property */
499 fixup_bus_range(dev);
505 void __devinit maple_pci_irq_fixup(struct pci_dev *dev)
507 DBG(" -> maple_pci_irq_fixup\n");
509 /* Fixup IRQ for PCIe host */
510 if (u4_pcie != NULL && dev->bus->number == 0 &&
511 pci_bus_to_host(dev->bus) == u4_pcie) {
512 printk(KERN_DEBUG "Fixup U4 PCIe IRQ\n");
513 dev->irq = irq_create_mapping(NULL, 1);
514 if (dev->irq != NO_IRQ)
515 set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
518 /* Hide AMD8111 IDE interrupt when in legacy mode so
519 * the driver calls pci_get_legacy_ide_irq()
521 if (dev->vendor == PCI_VENDOR_ID_AMD &&
522 dev->device == PCI_DEVICE_ID_AMD_8111_IDE &&
523 (dev->class & 5) != 5) {
527 DBG(" <- maple_pci_irq_fixup\n");
530 static void __init maple_fixup_phb_resources(void)
532 struct pci_controller *hose, *tmp;
534 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
535 unsigned long offset = (unsigned long)hose->io_base_virt - pci_io_base;
537 hose->io_resource.start += offset;
538 hose->io_resource.end += offset;
540 printk(KERN_INFO "PCI Host %d, io start: %llx; io end: %llx\n",
542 (unsigned long long)hose->io_resource.start,
543 (unsigned long long)hose->io_resource.end);
547 void __init maple_pci_init(void)
549 struct device_node *np, *root;
550 struct device_node *ht = NULL;
552 /* Probe root PCI hosts, that is on U3 the AGP host and the
553 * HyperTransport host. That one is actually "kept" around
554 * and actually added last as it's resource management relies
555 * on the AGP resources to have been setup first
557 root = of_find_node_by_path("/");
559 printk(KERN_CRIT "maple_find_bridges: can't find root of device tree\n");
562 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
563 if (np->name == NULL)
565 if (strcmp(np->name, "pci") == 0) {
566 if (add_bridge(np) == 0)
569 if (strcmp(np->name, "ht") == 0) {
576 /* Now setup the HyperTransport host if we found any
578 if (ht && add_bridge(ht) != 0)
582 * We need to call pci_setup_phb_io for the HT bridge first
583 * so it gets the I/O port numbers starting at 0, and we
584 * need to call it for the AGP bridge after that so it gets
585 * small positive I/O port numbers.
588 pci_setup_phb_io(u3_ht, 1);
590 pci_setup_phb_io(u3_agp, 0);
592 pci_setup_phb_io(u4_pcie, 0);
594 /* Fixup the IO resources on our host bridges as the common code
595 * does it only for childs of the host bridges
597 maple_fixup_phb_resources();
599 /* Setup the linkage between OF nodes and PHBs */
602 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
603 * assume there is no P2P bridge on the AGP bus, which should be a
604 * safe assumptions hopefully.
607 struct device_node *np = u3_agp->arch_data;
608 PCI_DN(np)->busno = 0xf0;
609 for (np = np->child; np; np = np->sibling)
610 PCI_DN(np)->busno = 0xf0;
613 /* Tell pci.c to not change any resource allocations. */
617 int maple_pci_get_legacy_ide_irq(struct pci_dev *pdev, int channel)
619 struct device_node *np;
620 unsigned int defirq = channel ? 15 : 14;
623 if (pdev->vendor != PCI_VENDOR_ID_AMD ||
624 pdev->device != PCI_DEVICE_ID_AMD_8111_IDE)
627 np = pci_device_to_OF_node(pdev);
629 printk("Failed to locate OF node for IDE %s\n",
633 irq = irq_of_parse_and_map(np, channel & 0x1);
635 printk("Failed to map onboard IDE interrupt for channel %d\n",
642 /* XXX: To remove once all firmwares are ok */
643 static void fixup_maple_ide(struct pci_dev* dev)
645 if (!machine_is(maple))
648 #if 0 /* Enable this to enable IDE port 0 */
652 pci_read_config_byte(dev, 0x40, &v);
654 pci_write_config_byte(dev, 0x40, v);
657 #if 0 /* fix bus master base */
658 pci_write_config_dword(dev, 0x20, 0xcc01);
659 printk("old ide resource: %lx -> %lx \n",
660 dev->resource[4].start, dev->resource[4].end);
661 dev->resource[4].start = 0xcc00;
662 dev->resource[4].end = 0xcc10;
664 #if 0 /* Enable this to fixup IDE sense/polarity of irqs in IO-APICs */
666 struct pci_dev *apicdev;
669 apicdev = pci_get_slot (dev->bus, PCI_DEVFN(5,0));
671 printk("IDE Fixup IRQ: Can't find IO-APIC !\n");
673 pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*14);
674 pci_read_config_dword(apicdev, 0xf4, &v);
676 pci_write_config_dword(apicdev, 0xf4, v);
677 pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*15);
678 pci_read_config_dword(apicdev, 0xf4, &v);
680 pci_write_config_dword(apicdev, 0xf4, v);
681 pci_dev_put(apicdev);
686 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_IDE,