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>
30 #define DBG(x...) printk(x)
35 static struct pci_controller *u3_agp, *u3_ht;
37 static int __init fixup_one_level_bus_range(struct device_node *node, int higher)
39 for (; node != 0;node = node->sibling) {
41 unsigned int *class_code;
44 /* For PCI<->PCI bridges or CardBus bridges, we go down */
45 class_code = (unsigned int *) get_property(node, "class-code", NULL);
46 if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
47 (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
49 bus_range = (int *) get_property(node, "bus-range", &len);
50 if (bus_range != NULL && len > 2 * sizeof(int)) {
51 if (bus_range[1] > higher)
52 higher = bus_range[1];
54 higher = fixup_one_level_bus_range(node->child, higher);
59 /* This routine fixes the "bus-range" property of all bridges in the
60 * system since they tend to have their "last" member wrong on macs
62 * Note that the bus numbers manipulated here are OF bus numbers, they
63 * are not Linux bus numbers.
65 static void __init fixup_bus_range(struct device_node *bridge)
70 /* Lookup the "bus-range" property for the hose */
71 bus_range = (int *) get_property(bridge, "bus-range", &len);
72 if (bus_range == NULL || len < 2 * sizeof(int)) {
73 printk(KERN_WARNING "Can't get bus-range for %s\n",
77 bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
81 #define U3_AGP_CFA0(devfn, off) \
82 ((1 << (unsigned long)PCI_SLOT(dev_fn)) \
83 | (((unsigned long)PCI_FUNC(dev_fn)) << 8) \
84 | (((unsigned long)(off)) & 0xFCUL))
86 #define U3_AGP_CFA1(bus, devfn, off) \
87 ((((unsigned long)(bus)) << 16) \
88 |(((unsigned long)(devfn)) << 8) \
89 |(((unsigned long)(off)) & 0xFCUL) \
92 static unsigned long u3_agp_cfg_access(struct pci_controller* hose,
93 u8 bus, u8 dev_fn, u8 offset)
97 if (bus == hose->first_busno) {
98 if (dev_fn < (11 << 3))
100 caddr = U3_AGP_CFA0(dev_fn, offset);
102 caddr = U3_AGP_CFA1(bus, dev_fn, offset);
104 /* Uninorth will return garbage if we don't read back the value ! */
106 out_le32(hose->cfg_addr, caddr);
107 } while (in_le32(hose->cfg_addr) != caddr);
110 return ((unsigned long)hose->cfg_data) + offset;
113 static int u3_agp_read_config(struct pci_bus *bus, unsigned int devfn,
114 int offset, int len, u32 *val)
116 struct pci_controller *hose;
119 hose = pci_bus_to_host(bus);
121 return PCIBIOS_DEVICE_NOT_FOUND;
123 addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
125 return PCIBIOS_DEVICE_NOT_FOUND;
127 * Note: the caller has already checked that offset is
128 * suitably aligned and that len is 1, 2 or 4.
132 *val = in_8((u8 *)addr);
135 *val = in_le16((u16 *)addr);
138 *val = in_le32((u32 *)addr);
141 return PCIBIOS_SUCCESSFUL;
144 static int u3_agp_write_config(struct pci_bus *bus, unsigned int devfn,
145 int offset, int len, u32 val)
147 struct pci_controller *hose;
150 hose = pci_bus_to_host(bus);
152 return PCIBIOS_DEVICE_NOT_FOUND;
154 addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
156 return PCIBIOS_DEVICE_NOT_FOUND;
158 * Note: the caller has already checked that offset is
159 * suitably aligned and that len is 1, 2 or 4.
163 out_8((u8 *)addr, val);
164 (void) in_8((u8 *)addr);
167 out_le16((u16 *)addr, val);
168 (void) in_le16((u16 *)addr);
171 out_le32((u32 *)addr, val);
172 (void) in_le32((u32 *)addr);
175 return PCIBIOS_SUCCESSFUL;
178 static struct pci_ops u3_agp_pci_ops =
185 #define U3_HT_CFA0(devfn, off) \
186 ((((unsigned long)devfn) << 8) | offset)
187 #define U3_HT_CFA1(bus, devfn, off) \
188 (U3_HT_CFA0(devfn, off) \
189 + (((unsigned long)bus) << 16) \
192 static unsigned long u3_ht_cfg_access(struct pci_controller* hose,
193 u8 bus, u8 devfn, u8 offset)
195 if (bus == hose->first_busno) {
196 if (PCI_SLOT(devfn) == 0)
198 return ((unsigned long)hose->cfg_data) + U3_HT_CFA0(devfn, offset);
200 return ((unsigned long)hose->cfg_data) + U3_HT_CFA1(bus, devfn, offset);
203 static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
204 int offset, int len, u32 *val)
206 struct pci_controller *hose;
209 hose = pci_bus_to_host(bus);
211 return PCIBIOS_DEVICE_NOT_FOUND;
213 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
215 return PCIBIOS_DEVICE_NOT_FOUND;
218 * Note: the caller has already checked that offset is
219 * suitably aligned and that len is 1, 2 or 4.
223 *val = in_8((u8 *)addr);
226 *val = in_le16((u16 *)addr);
229 *val = in_le32((u32 *)addr);
232 return PCIBIOS_SUCCESSFUL;
235 static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
236 int offset, int len, u32 val)
238 struct pci_controller *hose;
241 hose = pci_bus_to_host(bus);
243 return PCIBIOS_DEVICE_NOT_FOUND;
245 addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
247 return PCIBIOS_DEVICE_NOT_FOUND;
249 * Note: the caller has already checked that offset is
250 * suitably aligned and that len is 1, 2 or 4.
254 out_8((u8 *)addr, val);
255 (void) in_8((u8 *)addr);
258 out_le16((u16 *)addr, val);
259 (void) in_le16((u16 *)addr);
262 out_le32((u32 *)addr, val);
263 (void) in_le32((u32 *)addr);
266 return PCIBIOS_SUCCESSFUL;
269 static struct pci_ops u3_ht_pci_ops =
275 static void __init setup_u3_agp(struct pci_controller* hose)
277 /* On G5, we move AGP up to high bus number so we don't need
278 * to reassign bus numbers for HT. If we ever have P2P bridges
279 * on AGP, we'll have to move pci_assign_all_busses to the
280 * pci_controller structure so we enable it for AGP and not for
282 * We hard code the address because of the different size of
283 * the reg address cell, we shall fix that by killing struct
284 * reg_property and using some accessor functions instead
286 hose->first_busno = 0xf0;
287 hose->last_busno = 0xff;
288 hose->ops = &u3_agp_pci_ops;
289 hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
290 hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
295 static void __init setup_u3_ht(struct pci_controller* hose)
297 hose->ops = &u3_ht_pci_ops;
299 /* We hard code the address because of the different size of
300 * the reg address cell, we shall fix that by killing struct
301 * reg_property and using some accessor functions instead
303 hose->cfg_data = (volatile unsigned char *)ioremap(0xf2000000, 0x02000000);
305 hose->first_busno = 0;
306 hose->last_busno = 0xef;
311 static int __init add_bridge(struct device_node *dev)
314 struct pci_controller *hose;
318 struct property *of_prop;
320 DBG("Adding PCI host bridge %s\n", dev->full_name);
322 bus_range = (int *) get_property(dev, "bus-range", &len);
323 if (bus_range == NULL || len < 2 * sizeof(int)) {
324 printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
328 hose = alloc_bootmem(sizeof(struct pci_controller));
331 pci_setup_pci_controller(hose);
333 hose->arch_data = dev;
334 hose->first_busno = bus_range ? bus_range[0] : 0;
335 hose->last_busno = bus_range ? bus_range[1] : 0xff;
337 of_prop = alloc_bootmem(sizeof(struct property) +
338 sizeof(hose->global_number));
340 memset(of_prop, 0, sizeof(struct property));
341 of_prop->name = "linux,pci-domain";
342 of_prop->length = sizeof(hose->global_number);
343 of_prop->value = (unsigned char *)&of_prop[1];
344 memcpy(of_prop->value, &hose->global_number, sizeof(hose->global_number));
345 prom_add_property(dev, of_prop);
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);
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 /* Do the mapping of the IO space */
385 DBG(" <- maple_pcibios_fixup\n");
388 static void __init maple_fixup_phb_resources(void)
390 struct pci_controller *hose, *tmp;
392 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
393 unsigned long offset = (unsigned long)hose->io_base_virt - pci_io_base;
394 hose->io_resource.start += offset;
395 hose->io_resource.end += offset;
396 printk(KERN_INFO "PCI Host %d, io start: %lx; io end: %lx\n",
398 hose->io_resource.start, hose->io_resource.end);
402 void __init maple_pci_init(void)
404 struct device_node *np, *root;
405 struct device_node *ht = NULL;
407 /* Probe root PCI hosts, that is on U3 the AGP host and the
408 * HyperTransport host. That one is actually "kept" around
409 * and actually added last as it's resource management relies
410 * on the AGP resources to have been setup first
412 root = of_find_node_by_path("/");
414 printk(KERN_CRIT "maple_find_bridges: can't find root of device tree\n");
417 for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
418 if (np->name == NULL)
420 if (strcmp(np->name, "pci") == 0) {
421 if (add_bridge(np) == 0)
424 if (strcmp(np->name, "ht") == 0) {
431 /* Now setup the HyperTransport host if we found any
433 if (ht && add_bridge(ht) != 0)
436 /* Fixup the IO resources on our host bridges as the common code
437 * does it only for childs of the host bridges
439 maple_fixup_phb_resources();
441 /* Setup the linkage between OF nodes and PHBs */
444 /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
445 * assume there is no P2P bridge on the AGP bus, which should be a
446 * safe assumptions hopefully.
449 struct device_node *np = u3_agp->arch_data;
451 for (np = np->child; np; np = np->sibling)
455 /* Tell pci.c to use the common resource allocation mecanism */
462 int maple_pci_get_legacy_ide_irq(struct pci_dev *pdev, int channel)
464 struct device_node *np;
465 int irq = channel ? 15 : 14;
467 if (pdev->vendor != PCI_VENDOR_ID_AMD ||
468 pdev->device != PCI_DEVICE_ID_AMD_8111_IDE)
471 np = pci_device_to_OF_node(pdev);
476 return np->intrs[channel & 0x1].line;
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,