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>
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>
31 #define DBG(x...) printk(x)
36 static struct pci_controller *u3_agp, *u3_ht;
38 static int __init fixup_one_level_bus_range(struct device_node *node, int higher)
40 for (; node != 0;node = node->sibling) {
42 const unsigned int *class_code;
45 /* For PCI<->PCI bridges or CardBus bridges, we go down */
46 class_code = get_property(node, "class-code", NULL);
47 if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
48 (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
50 bus_range = get_property(node, "bus-range", &len);
51 if (bus_range != NULL && len > 2 * sizeof(int)) {
52 if (bus_range[1] > higher)
53 higher = bus_range[1];
55 higher = fixup_one_level_bus_range(node->child, higher);
60 /* This routine fixes the "bus-range" property of all bridges in the
61 * system since they tend to have their "last" member wrong on macs
63 * Note that the bus numbers manipulated here are OF bus numbers, they
64 * are not Linux bus numbers.
66 static void __init fixup_bus_range(struct device_node *bridge)
69 struct property *prop;
72 /* Lookup the "bus-range" property for the hose */
73 prop = of_find_property(bridge, "bus-range", &len);
74 if (prop == NULL || prop->value == NULL || len < 2 * sizeof(int)) {
75 printk(KERN_WARNING "Can't get bus-range for %s\n",
79 bus_range = (int *)prop->value;
80 bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
84 static unsigned long u3_agp_cfa0(u8 devfn, u8 off)
86 return (1 << (unsigned long)PCI_SLOT(devfn)) |
87 ((unsigned long)PCI_FUNC(devfn) << 8) |
88 ((unsigned long)off & 0xFCUL);
91 static unsigned long u3_agp_cfa1(u8 bus, u8 devfn, u8 off)
93 return ((unsigned long)bus << 16) |
94 ((unsigned long)devfn << 8) |
95 ((unsigned long)off & 0xFCUL) |
99 static volatile void __iomem *u3_agp_cfg_access(struct pci_controller* hose,
100 u8 bus, u8 dev_fn, u8 offset)
104 if (bus == hose->first_busno) {
105 if (dev_fn < (11 << 3))
107 caddr = u3_agp_cfa0(dev_fn, offset);
109 caddr = u3_agp_cfa1(bus, dev_fn, offset);
111 /* Uninorth will return garbage if we don't read back the value ! */
113 out_le32(hose->cfg_addr, caddr);
114 } while (in_le32(hose->cfg_addr) != caddr);
117 return hose->cfg_data + offset;
120 static int u3_agp_read_config(struct pci_bus *bus, unsigned int devfn,
121 int offset, int len, u32 *val)
123 struct pci_controller *hose;
124 volatile void __iomem *addr;
126 hose = pci_bus_to_host(bus);
128 return PCIBIOS_DEVICE_NOT_FOUND;
130 addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
132 return PCIBIOS_DEVICE_NOT_FOUND;
134 * Note: the caller has already checked that offset is
135 * suitably aligned and that len is 1, 2 or 4.
142 *val = in_le16(addr);
145 *val = in_le32(addr);
148 return PCIBIOS_SUCCESSFUL;
151 static int u3_agp_write_config(struct pci_bus *bus, unsigned int devfn,
152 int offset, int len, u32 val)
154 struct pci_controller *hose;
155 volatile void __iomem *addr;
157 hose = pci_bus_to_host(bus);
159 return PCIBIOS_DEVICE_NOT_FOUND;
161 addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
163 return PCIBIOS_DEVICE_NOT_FOUND;
165 * Note: the caller has already checked that offset is
166 * suitably aligned and that len is 1, 2 or 4.
175 (void) in_le16(addr);
179 (void) in_le32(addr);
182 return PCIBIOS_SUCCESSFUL;
185 static struct pci_ops u3_agp_pci_ops =
191 static unsigned long u3_ht_cfa0(u8 devfn, u8 off)
193 return (devfn << 8) | off;
196 static unsigned long u3_ht_cfa1(u8 bus, u8 devfn, u8 off)
198 return u3_ht_cfa0(devfn, off) + (bus << 16) + 0x01000000UL;
201 static volatile void __iomem *u3_ht_cfg_access(struct pci_controller* hose,
202 u8 bus, u8 devfn, u8 offset)
204 if (bus == hose->first_busno) {
205 if (PCI_SLOT(devfn) == 0)
207 return hose->cfg_data + u3_ht_cfa0(devfn, offset);
209 return hose->cfg_data + u3_ht_cfa1(bus, devfn, offset);
212 static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
213 int offset, int len, u32 *val)
215 struct pci_controller *hose;
216 volatile void __iomem *addr;
218 hose = pci_bus_to_host(bus);
220 return PCIBIOS_DEVICE_NOT_FOUND;
223 return PCIBIOS_BAD_REGISTER_NUMBER;
225 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
227 return PCIBIOS_DEVICE_NOT_FOUND;
230 * Note: the caller has already checked that offset is
231 * suitably aligned and that len is 1, 2 or 4.
238 *val = in_le16(addr);
241 *val = in_le32(addr);
244 return PCIBIOS_SUCCESSFUL;
247 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
248 int offset, int len, u32 val)
250 struct pci_controller *hose;
251 volatile void __iomem *addr;
253 hose = pci_bus_to_host(bus);
255 return PCIBIOS_DEVICE_NOT_FOUND;
258 return PCIBIOS_BAD_REGISTER_NUMBER;
260 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
262 return PCIBIOS_DEVICE_NOT_FOUND;
264 * Note: the caller has already checked that offset is
265 * suitably aligned and that len is 1, 2 or 4.
274 (void) in_le16(addr);
278 (void) in_le32(addr);
281 return PCIBIOS_SUCCESSFUL;
284 static struct pci_ops u3_ht_pci_ops =
290 static void __init setup_u3_agp(struct pci_controller* hose)
292 /* On G5, we move AGP up to high bus number so we don't need
293 * to reassign bus numbers for HT. If we ever have P2P bridges
294 * on AGP, we'll have to move pci_assign_all_buses to the
295 * pci_controller structure so we enable it for AGP and not for
297 * We hard code the address because of the different size of
298 * the reg address cell, we shall fix that by killing struct
299 * reg_property and using some accessor functions instead
301 hose->first_busno = 0xf0;
302 hose->last_busno = 0xff;
303 hose->ops = &u3_agp_pci_ops;
304 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
305 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
310 static void __init setup_u3_ht(struct pci_controller* hose)
312 hose->ops = &u3_ht_pci_ops;
314 /* We hard code the address because of the different size of
315 * the reg address cell, we shall fix that by killing struct
316 * reg_property and using some accessor functions instead
318 hose->cfg_data = ioremap(0xf2000000, 0x02000000);
320 hose->first_busno = 0;
321 hose->last_busno = 0xef;
326 static int __init add_bridge(struct device_node *dev)
329 struct pci_controller *hose;
331 const int *bus_range;
334 DBG("Adding PCI host bridge %s\n", dev->full_name);
336 bus_range = get_property(dev, "bus-range", &len);
337 if (bus_range == NULL || len < 2 * sizeof(int)) {
338 printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
342 hose = pcibios_alloc_controller(dev);
345 hose->first_busno = bus_range ? bus_range[0] : 0;
346 hose->last_busno = bus_range ? bus_range[1] : 0xff;
349 if (device_is_compatible(dev, "u3-agp")) {
351 disp_name = "U3-AGP";
353 } else if (device_is_compatible(dev, "u3-ht")) {
358 printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number: %d->%d\n",
359 disp_name, hose->first_busno, hose->last_busno);
361 /* Interpret the "ranges" property */
362 /* This also maps the I/O region and sets isa_io/mem_base */
363 pci_process_bridge_OF_ranges(hose, dev, primary);
364 pci_setup_phb_io(hose, primary);
366 /* Fixup "bus-range" OF property */
367 fixup_bus_range(dev);
373 void __init maple_pcibios_fixup(void)
375 struct pci_dev *dev = NULL;
377 DBG(" -> maple_pcibios_fixup\n");
379 for_each_pci_dev(dev)
380 pci_read_irq_line(dev);
382 DBG(" <- maple_pcibios_fixup\n");
385 static void __init maple_fixup_phb_resources(void)
387 struct pci_controller *hose, *tmp;
389 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
390 unsigned long offset = (unsigned long)hose->io_base_virt - pci_io_base;
391 hose->io_resource.start += offset;
392 hose->io_resource.end += offset;
393 printk(KERN_INFO "PCI Host %d, io start: %llx; io end: %llx\n",
395 (unsigned long long)hose->io_resource.start,
396 (unsigned long long)hose->io_resource.end);
400 void __init maple_pci_init(void)
402 struct device_node *np, *root;
403 struct device_node *ht = NULL;
405 /* Probe root PCI hosts, that is on U3 the AGP host and the
406 * HyperTransport host. That one is actually "kept" around
407 * and actually added last as it's resource management relies
408 * on the AGP resources to have been setup first
410 root = of_find_node_by_path("/");
412 printk(KERN_CRIT "maple_find_bridges: can't find root of device tree\n");
415 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
416 if (np->name == NULL)
418 if (strcmp(np->name, "pci") == 0) {
419 if (add_bridge(np) == 0)
422 if (strcmp(np->name, "ht") == 0) {
429 /* Now setup the HyperTransport host if we found any
431 if (ht && add_bridge(ht) != 0)
434 /* Fixup the IO resources on our host bridges as the common code
435 * does it only for childs of the host bridges
437 maple_fixup_phb_resources();
439 /* Setup the linkage between OF nodes and PHBs */
442 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
443 * assume there is no P2P bridge on the AGP bus, which should be a
444 * safe assumptions hopefully.
447 struct device_node *np = u3_agp->arch_data;
448 PCI_DN(np)->busno = 0xf0;
449 for (np = np->child; np; np = np->sibling)
450 PCI_DN(np)->busno = 0xf0;
453 /* Tell pci.c to not change any resource allocations. */
457 int maple_pci_get_legacy_ide_irq(struct pci_dev *pdev, int channel)
459 struct device_node *np;
460 unsigned int defirq = channel ? 15 : 14;
463 if (pdev->vendor != PCI_VENDOR_ID_AMD ||
464 pdev->device != PCI_DEVICE_ID_AMD_8111_IDE)
467 np = pci_device_to_OF_node(pdev);
470 irq = irq_of_parse_and_map(np, channel & 0x1);
472 printk("Failed to map onboard IDE interrupt for channel %d\n",
479 /* XXX: To remove once all firmwares are ok */
480 static void fixup_maple_ide(struct pci_dev* dev)
482 #if 0 /* Enable this to enable IDE port 0 */
486 pci_read_config_byte(dev, 0x40, &v);
488 pci_write_config_byte(dev, 0x40, v);
491 #if 0 /* fix bus master base */
492 pci_write_config_dword(dev, 0x20, 0xcc01);
493 printk("old ide resource: %lx -> %lx \n",
494 dev->resource[4].start, dev->resource[4].end);
495 dev->resource[4].start = 0xcc00;
496 dev->resource[4].end = 0xcc10;
498 #if 1 /* Enable this to fixup IDE sense/polarity of irqs in IO-APICs */
500 struct pci_dev *apicdev;
503 apicdev = pci_get_slot (dev->bus, PCI_DEVFN(5,0));
505 printk("IDE Fixup IRQ: Can't find IO-APIC !\n");
507 pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*14);
508 pci_read_config_dword(apicdev, 0xf4, &v);
510 pci_write_config_dword(apicdev, 0xf4, v);
511 pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*15);
512 pci_read_config_dword(apicdev, 0xf4, &v);
514 pci_write_config_dword(apicdev, 0xf4, v);
515 pci_dev_put(apicdev);
520 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_IDE,