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-rw-r--r--arch/ppc/platforms/pmac_pci.c1124
1 files changed, 0 insertions, 1124 deletions
diff --git a/arch/ppc/platforms/pmac_pci.c b/arch/ppc/platforms/pmac_pci.c
deleted file mode 100644
index 786295b..0000000
--- a/arch/ppc/platforms/pmac_pci.c
+++ /dev/null
@@ -1,1124 +0,0 @@
-/*
- * Support for PCI bridges found on Power Macintoshes.
- * At present the "bandit" and "chaos" bridges are supported.
- * Fortunately you access configuration space in the same
- * way with either bridge.
- *
- * Copyright (C) 1997 Paul Mackerras (paulus@cs.anu.edu.au)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/delay.h>
-#include <linux/string.h>
-#include <linux/init.h>
-
-#include <asm/sections.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/pci-bridge.h>
-#include <asm/machdep.h>
-#include <asm/pmac_feature.h>
-
-#undef DEBUG
-
-#ifdef DEBUG
-#ifdef CONFIG_XMON
-extern void xmon_printf(const char *fmt, ...);
-#define DBG(x...) xmon_printf(x)
-#else
-#define DBG(x...) printk(x)
-#endif
-#else
-#define DBG(x...)
-#endif
-
-static int add_bridge(struct device_node *dev);
-extern void pmac_check_ht_link(void);
-
-/* XXX Could be per-controller, but I don't think we risk anything by
- * assuming we won't have both UniNorth and Bandit */
-static int has_uninorth;
-#ifdef CONFIG_POWER4
-static struct pci_controller *u3_agp;
-#endif /* CONFIG_POWER4 */
-
-extern u8 pci_cache_line_size;
-extern int pcibios_assign_bus_offset;
-
-struct device_node *k2_skiplist[2];
-
-/*
- * Magic constants for enabling cache coherency in the bandit/PSX bridge.
- */
-#define BANDIT_DEVID_2 8
-#define BANDIT_REVID 3
-
-#define BANDIT_DEVNUM 11
-#define BANDIT_MAGIC 0x50
-#define BANDIT_COHERENT 0x40
-
-static int __init
-fixup_one_level_bus_range(struct device_node *node, int higher)
-{
- for (; node != 0;node = node->sibling) {
- int * bus_range;
- unsigned int *class_code;
- int len;
-
- /* For PCI<->PCI bridges or CardBus bridges, we go down */
- class_code = (unsigned int *) get_property(node, "class-code", NULL);
- if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
- (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
- continue;
- bus_range = (int *) get_property(node, "bus-range", &len);
- if (bus_range != NULL && len > 2 * sizeof(int)) {
- if (bus_range[1] > higher)
- higher = bus_range[1];
- }
- higher = fixup_one_level_bus_range(node->child, higher);
- }
- return higher;
-}
-
-/* This routine fixes the "bus-range" property of all bridges in the
- * system since they tend to have their "last" member wrong on macs
- *
- * Note that the bus numbers manipulated here are OF bus numbers, they
- * are not Linux bus numbers.
- */
-static void __init
-fixup_bus_range(struct device_node *bridge)
-{
- int * bus_range;
- int len;
-
- /* Lookup the "bus-range" property for the hose */
- bus_range = (int *) get_property(bridge, "bus-range", &len);
- if (bus_range == NULL || len < 2 * sizeof(int)) {
- printk(KERN_WARNING "Can't get bus-range for %s\n",
- bridge->full_name);
- return;
- }
- bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
-}
-
-/*
- * Apple MacRISC (U3, UniNorth, Bandit, Chaos) PCI controllers.
- *
- * The "Bandit" version is present in all early PCI PowerMacs,
- * and up to the first ones using Grackle. Some machines may
- * have 2 bandit controllers (2 PCI busses).
- *
- * "Chaos" is used in some "Bandit"-type machines as a bridge
- * for the separate display bus. It is accessed the same
- * way as bandit, but cannot be probed for devices. It therefore
- * has its own config access functions.
- *
- * The "UniNorth" version is present in all Core99 machines
- * (iBook, G4, new IMacs, and all the recent Apple machines).
- * It contains 3 controllers in one ASIC.
- *
- * The U3 is the bridge used on G5 machines. It contains an
- * AGP bus which is dealt with the old UniNorth access routines
- * and a HyperTransport bus which uses its own set of access
- * functions.
- */
-
-#define MACRISC_CFA0(devfn, off) \
- ((1 << (unsigned long)PCI_SLOT(dev_fn)) \
- | (((unsigned long)PCI_FUNC(dev_fn)) << 8) \
- | (((unsigned long)(off)) & 0xFCUL))
-
-#define MACRISC_CFA1(bus, devfn, off) \
- ((((unsigned long)(bus)) << 16) \
- |(((unsigned long)(devfn)) << 8) \
- |(((unsigned long)(off)) & 0xFCUL) \
- |1UL)
-
-static void volatile __iomem *
-macrisc_cfg_access(struct pci_controller* hose, u8 bus, u8 dev_fn, u8 offset)
-{
- unsigned int caddr;
-
- if (bus == hose->first_busno) {
- if (dev_fn < (11 << 3))
- return NULL;
- caddr = MACRISC_CFA0(dev_fn, offset);
- } else
- caddr = MACRISC_CFA1(bus, dev_fn, offset);
-
- /* Uninorth will return garbage if we don't read back the value ! */
- do {
- out_le32(hose->cfg_addr, caddr);
- } while (in_le32(hose->cfg_addr) != caddr);
-
- offset &= has_uninorth ? 0x07 : 0x03;
- return hose->cfg_data + offset;
-}
-
-static int
-macrisc_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
- int len, u32 *val)
-{
- struct pci_controller *hose = bus->sysdata;
- void volatile __iomem *addr;
-
- addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
- if (!addr)
- return PCIBIOS_DEVICE_NOT_FOUND;
- /*
- * Note: the caller has already checked that offset is
- * suitably aligned and that len is 1, 2 or 4.
- */
- switch (len) {
- case 1:
- *val = in_8(addr);
- break;
- case 2:
- *val = in_le16(addr);
- break;
- default:
- *val = in_le32(addr);
- break;
- }
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int
-macrisc_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
- int len, u32 val)
-{
- struct pci_controller *hose = bus->sysdata;
- void volatile __iomem *addr;
-
- addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
- if (!addr)
- return PCIBIOS_DEVICE_NOT_FOUND;
- /*
- * Note: the caller has already checked that offset is
- * suitably aligned and that len is 1, 2 or 4.
- */
- switch (len) {
- case 1:
- out_8(addr, val);
- (void) in_8(addr);
- break;
- case 2:
- out_le16(addr, val);
- (void) in_le16(addr);
- break;
- default:
- out_le32(addr, val);
- (void) in_le32(addr);
- break;
- }
- return PCIBIOS_SUCCESSFUL;
-}
-
-static struct pci_ops macrisc_pci_ops =
-{
- macrisc_read_config,
- macrisc_write_config
-};
-
-/*
- * Verifiy that a specific (bus, dev_fn) exists on chaos
- */
-static int
-chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
-{
- struct device_node *np;
- u32 *vendor, *device;
-
- np = pci_busdev_to_OF_node(bus, devfn);
- if (np == NULL)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- vendor = (u32 *)get_property(np, "vendor-id", NULL);
- device = (u32 *)get_property(np, "device-id", NULL);
- if (vendor == NULL || device == NULL)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if ((*vendor == 0x106b) && (*device == 3) && (offset >= 0x10)
- && (offset != 0x14) && (offset != 0x18) && (offset <= 0x24))
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int
-chaos_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
- int len, u32 *val)
-{
- int result = chaos_validate_dev(bus, devfn, offset);
- if (result == PCIBIOS_BAD_REGISTER_NUMBER)
- *val = ~0U;
- if (result != PCIBIOS_SUCCESSFUL)
- return result;
- return macrisc_read_config(bus, devfn, offset, len, val);
-}
-
-static int
-chaos_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
- int len, u32 val)
-{
- int result = chaos_validate_dev(bus, devfn, offset);
- if (result != PCIBIOS_SUCCESSFUL)
- return result;
- return macrisc_write_config(bus, devfn, offset, len, val);
-}
-
-static struct pci_ops chaos_pci_ops =
-{
- chaos_read_config,
- chaos_write_config
-};
-
-#ifdef CONFIG_POWER4
-
-/*
- * These versions of U3 HyperTransport config space access ops do not
- * implement self-view of the HT host yet
- */
-
-#define U3_HT_CFA0(devfn, off) \
- ((((unsigned long)devfn) << 8) | offset)
-#define U3_HT_CFA1(bus, devfn, off) \
- (U3_HT_CFA0(devfn, off) \
- + (((unsigned long)bus) << 16) \
- + 0x01000000UL)
-
-static void volatile __iomem *
-u3_ht_cfg_access(struct pci_controller* hose, u8 bus, u8 devfn, u8 offset)
-{
- if (bus == hose->first_busno) {
- /* For now, we don't self probe U3 HT bridge */
- if (PCI_FUNC(devfn) != 0 || PCI_SLOT(devfn) > 7 ||
- PCI_SLOT(devfn) < 1)
- return 0;
- return hose->cfg_data + U3_HT_CFA0(devfn, offset);
- } else
- return hose->cfg_data + U3_HT_CFA1(bus, devfn, offset);
-}
-
-static int
-u3_ht_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
- int len, u32 *val)
-{
- struct pci_controller *hose = bus->sysdata;
- void volatile __iomem *addr;
- int i;
-
- struct device_node *np = pci_busdev_to_OF_node(bus, devfn);
- if (np == NULL)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- /*
- * When a device in K2 is powered down, we die on config
- * cycle accesses. Fix that here.
- */
- for (i=0; i<2; i++)
- if (k2_skiplist[i] == np) {
- switch (len) {
- case 1:
- *val = 0xff; break;
- case 2:
- *val = 0xffff; break;
- default:
- *val = 0xfffffffful; break;
- }
- return PCIBIOS_SUCCESSFUL;
- }
-
- addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
- if (!addr)
- return PCIBIOS_DEVICE_NOT_FOUND;
- /*
- * Note: the caller has already checked that offset is
- * suitably aligned and that len is 1, 2 or 4.
- */
- switch (len) {
- case 1:
- *val = in_8(addr);
- break;
- case 2:
- *val = in_le16(addr);
- break;
- default:
- *val = in_le32(addr);
- break;
- }
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int
-u3_ht_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
- int len, u32 val)
-{
- struct pci_controller *hose = bus->sysdata;
- void volatile __iomem *addr;
- int i;
-
- struct device_node *np = pci_busdev_to_OF_node(bus, devfn);
- if (np == NULL)
- return PCIBIOS_DEVICE_NOT_FOUND;
- /*
- * When a device in K2 is powered down, we die on config
- * cycle accesses. Fix that here.
- */
- for (i=0; i<2; i++)
- if (k2_skiplist[i] == np)
- return PCIBIOS_SUCCESSFUL;
-
- addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
- if (!addr)
- return PCIBIOS_DEVICE_NOT_FOUND;
- /*
- * Note: the caller has already checked that offset is
- * suitably aligned and that len is 1, 2 or 4.
- */
- switch (len) {
- case 1:
- out_8(addr, val);
- (void) in_8(addr);
- break;
- case 2:
- out_le16(addr, val);
- (void) in_le16(addr);
- break;
- default:
- out_le32(addr, val);
- (void) in_le32(addr);
- break;
- }
- return PCIBIOS_SUCCESSFUL;
-}
-
-static struct pci_ops u3_ht_pci_ops =
-{
- u3_ht_read_config,
- u3_ht_write_config
-};
-
-#endif /* CONFIG_POWER4 */
-
-/*
- * For a bandit bridge, turn on cache coherency if necessary.
- * N.B. we could clean this up using the hose ops directly.
- */
-static void __init
-init_bandit(struct pci_controller *bp)
-{
- unsigned int vendev, magic;
- int rev;
-
- /* read the word at offset 0 in config space for device 11 */
- out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_VENDOR_ID);
- udelay(2);
- vendev = in_le32(bp->cfg_data);
- if (vendev == (PCI_DEVICE_ID_APPLE_BANDIT << 16) +
- PCI_VENDOR_ID_APPLE) {
- /* read the revision id */
- out_le32(bp->cfg_addr,
- (1UL << BANDIT_DEVNUM) + PCI_REVISION_ID);
- udelay(2);
- rev = in_8(bp->cfg_data);
- if (rev != BANDIT_REVID)
- printk(KERN_WARNING
- "Unknown revision %d for bandit\n", rev);
- } else if (vendev != (BANDIT_DEVID_2 << 16) + PCI_VENDOR_ID_APPLE) {
- printk(KERN_WARNING "bandit isn't? (%x)\n", vendev);
- return;
- }
-
- /* read the word at offset 0x50 */
- out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + BANDIT_MAGIC);
- udelay(2);
- magic = in_le32(bp->cfg_data);
- if ((magic & BANDIT_COHERENT) != 0)
- return;
- magic |= BANDIT_COHERENT;
- udelay(2);
- out_le32(bp->cfg_data, magic);
- printk(KERN_INFO "Cache coherency enabled for bandit/PSX\n");
-}
-
-
-/*
- * Tweak the PCI-PCI bridge chip on the blue & white G3s.
- */
-static void __init
-init_p2pbridge(void)
-{
- struct device_node *p2pbridge;
- struct pci_controller* hose;
- u8 bus, devfn;
- u16 val;
-
- /* XXX it would be better here to identify the specific
- PCI-PCI bridge chip we have. */
- if ((p2pbridge = find_devices("pci-bridge")) == 0
- || p2pbridge->parent == NULL
- || strcmp(p2pbridge->parent->name, "pci") != 0)
- return;
- if (pci_device_from_OF_node(p2pbridge, &bus, &devfn) < 0) {
- DBG("Can't find PCI infos for PCI<->PCI bridge\n");
- return;
- }
- /* Warning: At this point, we have not yet renumbered all busses.
- * So we must use OF walking to find out hose
- */
- hose = pci_find_hose_for_OF_device(p2pbridge);
- if (!hose) {
- DBG("Can't find hose for PCI<->PCI bridge\n");
- return;
- }
- if (early_read_config_word(hose, bus, devfn,
- PCI_BRIDGE_CONTROL, &val) < 0) {
- printk(KERN_ERR "init_p2pbridge: couldn't read bridge control\n");
- return;
- }
- val &= ~PCI_BRIDGE_CTL_MASTER_ABORT;
- early_write_config_word(hose, bus, devfn, PCI_BRIDGE_CONTROL, val);
-}
-
-/*
- * Some Apple desktop machines have a NEC PD720100A USB2 controller
- * on the motherboard. Open Firmware, on these, will disable the
- * EHCI part of it so it behaves like a pair of OHCI's. This fixup
- * code re-enables it ;)
- */
-static void __init
-fixup_nec_usb2(void)
-{
- struct device_node *nec;
-
- for (nec = NULL; (nec = of_find_node_by_name(nec, "usb")) != NULL;) {
- struct pci_controller *hose;
- u32 data, *prop;
- u8 bus, devfn;
-
- prop = (u32 *)get_property(nec, "vendor-id", NULL);
- if (prop == NULL)
- continue;
- if (0x1033 != *prop)
- continue;
- prop = (u32 *)get_property(nec, "device-id", NULL);
- if (prop == NULL)
- continue;
- if (0x0035 != *prop)
- continue;
- prop = (u32 *)get_property(nec, "reg", NULL);
- if (prop == NULL)
- continue;
- devfn = (prop[0] >> 8) & 0xff;
- bus = (prop[0] >> 16) & 0xff;
- if (PCI_FUNC(devfn) != 0)
- continue;
- hose = pci_find_hose_for_OF_device(nec);
- if (!hose)
- continue;
- early_read_config_dword(hose, bus, devfn, 0xe4, &data);
- if (data & 1UL) {
- printk("Found NEC PD720100A USB2 chip with disabled EHCI, fixing up...\n");
- data &= ~1UL;
- early_write_config_dword(hose, bus, devfn, 0xe4, data);
- early_write_config_byte(hose, bus, devfn | 2, PCI_INTERRUPT_LINE,
- nec->intrs[0].line);
- }
- }
-}
-
-void __init
-pmac_find_bridges(void)
-{
- struct device_node *np, *root;
- struct device_node *ht = NULL;
-
- root = of_find_node_by_path("/");
- if (root == NULL) {
- printk(KERN_CRIT "pmac_find_bridges: can't find root of device tree\n");
- return;
- }
- for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
- if (np->name == NULL)
- continue;
- if (strcmp(np->name, "bandit") == 0
- || strcmp(np->name, "chaos") == 0
- || strcmp(np->name, "pci") == 0) {
- if (add_bridge(np) == 0)
- of_node_get(np);
- }
- if (strcmp(np->name, "ht") == 0) {
- of_node_get(np);
- ht = np;
- }
- }
- of_node_put(root);
-
- /* Probe HT last as it relies on the agp resources to be already
- * setup
- */
- if (ht && add_bridge(ht) != 0)
- of_node_put(ht);
-
- init_p2pbridge();
- fixup_nec_usb2();
-
- /* We are still having some issues with the Xserve G4, enabling
- * some offset between bus number and domains for now when we
- * assign all busses should help for now
- */
- if (pci_assign_all_buses)
- pcibios_assign_bus_offset = 0x10;
-
-#ifdef CONFIG_POWER4
- /* There is something wrong with DMA on U3/HT. I haven't figured out
- * the details yet, but if I set the cache line size to 128 bytes like
- * it should, I'm getting memory corruption caused by devices like
- * sungem (even without the MWI bit set, but maybe sungem doesn't
- * care). Right now, it appears that setting up a 64 bytes line size
- * works properly, 64 bytes beeing the max transfer size of HT, I
- * suppose this is related the way HT/PCI are hooked together. I still
- * need to dive into more specs though to be really sure of what's
- * going on. --BenH.
- *
- * Ok, apparently, it's just that HT can't do more than 64 bytes
- * transactions. MWI seem to be meaningless there as well, it may
- * be worth nop'ing out pci_set_mwi too though I haven't done that
- * yet.
- *
- * Note that it's a bit different for whatever is in the AGP slot.
- * For now, I don't care, but this can become a real issue, we
- * should probably hook pci_set_mwi anyway to make sure it sets
- * the real cache line size in there.
- */
- if (machine_is_compatible("MacRISC4"))
- pci_cache_line_size = 16; /* 64 bytes */
-
- pmac_check_ht_link();
-#endif /* CONFIG_POWER4 */
-}
-
-#define GRACKLE_CFA(b, d, o) (0x80 | ((b) << 8) | ((d) << 16) \
- | (((o) & ~3) << 24))
-
-#define GRACKLE_PICR1_STG 0x00000040
-#define GRACKLE_PICR1_LOOPSNOOP 0x00000010
-
-/* N.B. this is called before bridges is initialized, so we can't
- use grackle_pcibios_{read,write}_config_dword. */
-static inline void grackle_set_stg(struct pci_controller* bp, int enable)
-{
- unsigned int val;
-
- out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
- val = in_le32(bp->cfg_data);
- val = enable? (val | GRACKLE_PICR1_STG) :
- (val & ~GRACKLE_PICR1_STG);
- out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
- out_le32(bp->cfg_data, val);
- (void)in_le32(bp->cfg_data);
-}
-
-static inline void grackle_set_loop_snoop(struct pci_controller *bp, int enable)
-{
- unsigned int val;
-
- out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
- val = in_le32(bp->cfg_data);
- val = enable? (val | GRACKLE_PICR1_LOOPSNOOP) :
- (val & ~GRACKLE_PICR1_LOOPSNOOP);
- out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
- out_le32(bp->cfg_data, val);
- (void)in_le32(bp->cfg_data);
-}
-
-static int __init
-setup_uninorth(struct pci_controller* hose, struct reg_property* addr)
-{
- pci_assign_all_buses = 1;
- has_uninorth = 1;
- hose->ops = &macrisc_pci_ops;
- hose->cfg_addr = ioremap(addr->address + 0x800000, 0x1000);
- hose->cfg_data = ioremap(addr->address + 0xc00000, 0x1000);
- /* We "know" that the bridge at f2000000 has the PCI slots. */
- return addr->address == 0xf2000000;
-}
-
-static void __init
-setup_bandit(struct pci_controller* hose, struct reg_property* addr)
-{
- hose->ops = &macrisc_pci_ops;
- hose->cfg_addr = ioremap(addr->address + 0x800000, 0x1000);
- hose->cfg_data = ioremap(addr->address + 0xc00000, 0x1000);
- init_bandit(hose);
-}
-
-static void __init
-setup_chaos(struct pci_controller* hose, struct reg_property* addr)
-{
- /* assume a `chaos' bridge */
- hose->ops = &chaos_pci_ops;
- hose->cfg_addr = ioremap(addr->address + 0x800000, 0x1000);
- hose->cfg_data = ioremap(addr->address + 0xc00000, 0x1000);
-}
-
-#ifdef CONFIG_POWER4
-
-static void __init
-setup_u3_agp(struct pci_controller* hose, struct reg_property* addr)
-{
- /* On G5, we move AGP up to high bus number so we don't need
- * to reassign bus numbers for HT. If we ever have P2P bridges
- * on AGP, we'll have to move pci_assign_all_buses to the
- * pci_controller structure so we enable it for AGP and not for
- * HT childs.
- * We hard code the address because of the different size of
- * the reg address cell, we shall fix that by killing struct
- * reg_property and using some accessor functions instead
- */
- hose->first_busno = 0xf0;
- hose->last_busno = 0xff;
- has_uninorth = 1;
- hose->ops = &macrisc_pci_ops;
- hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
- hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
-
- u3_agp = hose;
-}
-
-static void __init
-setup_u3_ht(struct pci_controller* hose, struct reg_property *addr)
-{
- struct device_node *np = (struct device_node *)hose->arch_data;
- int i, cur;
-
- hose->ops = &u3_ht_pci_ops;
-
- /* We hard code the address because of the different size of
- * the reg address cell, we shall fix that by killing struct
- * reg_property and using some accessor functions instead
- */
- hose->cfg_data = ioremap(0xf2000000, 0x02000000);
-
- /*
- * /ht node doesn't expose a "ranges" property, so we "remove" regions that
- * have been allocated to AGP. So far, this version of the code doesn't assign
- * any of the 0xfxxxxxxx "fine" memory regions to /ht.
- * We need to fix that sooner or later by either parsing all child "ranges"
- * properties or figuring out the U3 address space decoding logic and
- * then read its configuration register (if any).
- */
- hose->io_base_phys = 0xf4000000;
- hose->io_base_virt = ioremap(hose->io_base_phys, 0x00400000);
- isa_io_base = (unsigned long) hose->io_base_virt;
- hose->io_resource.name = np->full_name;
- hose->io_resource.start = 0;
- hose->io_resource.end = 0x003fffff;
- hose->io_resource.flags = IORESOURCE_IO;
- hose->pci_mem_offset = 0;
- hose->first_busno = 0;
- hose->last_busno = 0xef;
- hose->mem_resources[0].name = np->full_name;
- hose->mem_resources[0].start = 0x80000000;
- hose->mem_resources[0].end = 0xefffffff;
- hose->mem_resources[0].flags = IORESOURCE_MEM;
-
- if (u3_agp == NULL) {
- DBG("U3 has no AGP, using full resource range\n");
- return;
- }
-
- /* We "remove" the AGP resources from the resources allocated to HT, that
- * is we create "holes". However, that code does assumptions that so far
- * happen to be true (cross fingers...), typically that resources in the
- * AGP node are properly ordered
- */
- cur = 0;
- for (i=0; i<3; i++) {
- struct resource *res = &u3_agp->mem_resources[i];
- if (res->flags != IORESOURCE_MEM)
- continue;
- /* We don't care about "fine" resources */
- if (res->start >= 0xf0000000)
- continue;
- /* Check if it's just a matter of "shrinking" us in one direction */
- if (hose->mem_resources[cur].start == res->start) {
- DBG("U3/HT: shrink start of %d, %08lx -> %08lx\n",
- cur, hose->mem_resources[cur].start, res->end + 1);
- hose->mem_resources[cur].start = res->end + 1;
- continue;
- }
- if (hose->mem_resources[cur].end == res->end) {
- DBG("U3/HT: shrink end of %d, %08lx -> %08lx\n",
- cur, hose->mem_resources[cur].end, res->start - 1);
- hose->mem_resources[cur].end = res->start - 1;
- continue;
- }
- /* No, it's not the case, we need a hole */
- if (cur == 2) {
- /* not enough resources to make a hole, we drop part of the range */
- printk(KERN_WARNING "Running out of resources for /ht host !\n");
- hose->mem_resources[cur].end = res->start - 1;
- continue;
- }
- cur++;
- DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
- cur-1, res->start - 1, cur, res->end + 1);
- hose->mem_resources[cur].name = np->full_name;
- hose->mem_resources[cur].flags = IORESOURCE_MEM;
- hose->mem_resources[cur].start = res->end + 1;
- hose->mem_resources[cur].end = hose->mem_resources[cur-1].end;
- hose->mem_resources[cur-1].end = res->start - 1;
- }
-}
-
-#endif /* CONFIG_POWER4 */
-
-void __init
-setup_grackle(struct pci_controller *hose)
-{
- setup_indirect_pci(hose, 0xfec00000, 0xfee00000);
- if (machine_is_compatible("AAPL,PowerBook1998"))
- grackle_set_loop_snoop(hose, 1);
-#if 0 /* Disabled for now, HW problems ??? */
- grackle_set_stg(hose, 1);
-#endif
-}
-
-/*
- * We assume that if we have a G3 powermac, we have one bridge called
- * "pci" (a MPC106) and no bandit or chaos bridges, and contrariwise,
- * if we have one or more bandit or chaos bridges, we don't have a MPC106.
- */
-static int __init
-add_bridge(struct device_node *dev)
-{
- int len;
- struct pci_controller *hose;
- struct reg_property *addr;
- char* disp_name;
- int *bus_range;
- int primary = 1;
-
- DBG("Adding PCI host bridge %s\n", dev->full_name);
-
- addr = (struct reg_property *) get_property(dev, "reg", &len);
- if (addr == NULL || len < sizeof(*addr)) {
- printk(KERN_WARNING "Can't use %s: no address\n",
- dev->full_name);
- return -ENODEV;
- }
- bus_range = (int *) get_property(dev, "bus-range", &len);
- if (bus_range == NULL || len < 2 * sizeof(int)) {
- printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
- dev->full_name);
- }
-
- hose = pcibios_alloc_controller();
- if (!hose)
- return -ENOMEM;
- hose->arch_data = dev;
- hose->first_busno = bus_range ? bus_range[0] : 0;
- hose->last_busno = bus_range ? bus_range[1] : 0xff;
-
- disp_name = NULL;
-#ifdef CONFIG_POWER4
- if (device_is_compatible(dev, "u3-agp")) {
- setup_u3_agp(hose, addr);
- disp_name = "U3-AGP";
- primary = 0;
- } else if (device_is_compatible(dev, "u3-ht")) {
- setup_u3_ht(hose, addr);
- disp_name = "U3-HT";
- primary = 1;
- } else
-#endif /* CONFIG_POWER4 */
- if (device_is_compatible(dev, "uni-north")) {
- primary = setup_uninorth(hose, addr);
- disp_name = "UniNorth";
- } else if (strcmp(dev->name, "pci") == 0) {
- /* XXX assume this is a mpc106 (grackle) */
- setup_grackle(hose);
- disp_name = "Grackle (MPC106)";
- } else if (strcmp(dev->name, "bandit") == 0) {
- setup_bandit(hose, addr);
- disp_name = "Bandit";
- } else if (strcmp(dev->name, "chaos") == 0) {
- setup_chaos(hose, addr);
- disp_name = "Chaos";
- primary = 0;
- }
- printk(KERN_INFO "Found %s PCI host bridge at 0x%08x. Firmware bus number: %d->%d\n",
- disp_name, addr->address, hose->first_busno, hose->last_busno);
- DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
- hose, hose->cfg_addr, hose->cfg_data);
-
- /* Interpret the "ranges" property */
- /* This also maps the I/O region and sets isa_io/mem_base */
- pci_process_bridge_OF_ranges(hose, dev, primary);
-
- /* Fixup "bus-range" OF property */
- fixup_bus_range(dev);
-
- return 0;
-}
-
-static void __init
-pcibios_fixup_OF_interrupts(void)
-{
- struct pci_dev* dev = NULL;
-
- /*
- * Open Firmware often doesn't initialize the
- * PCI_INTERRUPT_LINE config register properly, so we
- * should find the device node and apply the interrupt
- * obtained from the OF device-tree
- */
- for_each_pci_dev(dev) {
- struct device_node *node;
- node = pci_device_to_OF_node(dev);
- /* this is the node, see if it has interrupts */
- if (node && node->n_intrs > 0)
- dev->irq = node->intrs[0].line;
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
- }
-}
-
-void __init
-pmac_pcibios_fixup(void)
-{
- /* Fixup interrupts according to OF tree */
- pcibios_fixup_OF_interrupts();
-}
-
-int
-pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
-{
- struct device_node* node;
- int updatecfg = 0;
- int uninorth_child;
-
- node = pci_device_to_OF_node(dev);
-
- /* We don't want to enable USB controllers absent from the OF tree
- * (iBook second controller)
- */
- if (dev->vendor == PCI_VENDOR_ID_APPLE
- && (dev->class == ((PCI_CLASS_SERIAL_USB << 8) | 0x10))
- && !node) {
- printk(KERN_INFO "Apple USB OHCI %s disabled by firmware\n",
- pci_name(dev));
- return -EINVAL;
- }
-
- if (!node)
- return 0;
-
- uninorth_child = node->parent &&
- device_is_compatible(node->parent, "uni-north");
-
- /* Firewire & GMAC were disabled after PCI probe, the driver is
- * claiming them, we must re-enable them now.
- */
- if (uninorth_child && !strcmp(node->name, "firewire") &&
- (device_is_compatible(node, "pci106b,18") ||
- device_is_compatible(node, "pci106b,30") ||
- device_is_compatible(node, "pci11c1,5811"))) {
- pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, node, 0, 1);
- pmac_call_feature(PMAC_FTR_1394_ENABLE, node, 0, 1);
- updatecfg = 1;
- }
- if (uninorth_child && !strcmp(node->name, "ethernet") &&
- device_is_compatible(node, "gmac")) {
- pmac_call_feature(PMAC_FTR_GMAC_ENABLE, node, 0, 1);
- updatecfg = 1;
- }
-
- if (updatecfg) {
- u16 cmd;
-
- /*
- * Make sure PCI is correctly configured
- *
- * We use old pci_bios versions of the function since, by
- * default, gmac is not powered up, and so will be absent
- * from the kernel initial PCI lookup.
- *
- * Should be replaced by 2.4 new PCI mechanisms and really
- * register the device.
- */
- pci_read_config_word(dev, PCI_COMMAND, &cmd);
- cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE;
- pci_write_config_word(dev, PCI_COMMAND, cmd);
- pci_write_config_byte(dev, PCI_LATENCY_TIMER, 16);
- pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, pci_cache_line_size);
- }
-
- return 0;
-}
-
-/* We power down some devices after they have been probed. They'll
- * be powered back on later on
- */
-void __init
-pmac_pcibios_after_init(void)
-{
- struct device_node* nd;
-
-#ifdef CONFIG_BLK_DEV_IDE
- struct pci_dev *dev = NULL;
-
- /* OF fails to initialize IDE controllers on macs
- * (and maybe other machines)
- *
- * Ideally, this should be moved to the IDE layer, but we need
- * to check specifically with Andre Hedrick how to do it cleanly
- * since the common IDE code seem to care about the fact that the
- * BIOS may have disabled a controller.
- *
- * -- BenH
- */
- for_each_pci_dev(dev) {
- if ((dev->class >> 16) == PCI_BASE_CLASS_STORAGE)
- pci_enable_device(dev);
- }
-#endif /* CONFIG_BLK_DEV_IDE */
-
- nd = find_devices("firewire");
- while (nd) {
- if (nd->parent && (device_is_compatible(nd, "pci106b,18") ||
- device_is_compatible(nd, "pci106b,30") ||
- device_is_compatible(nd, "pci11c1,5811"))
- && device_is_compatible(nd->parent, "uni-north")) {
- pmac_call_feature(PMAC_FTR_1394_ENABLE, nd, 0, 0);
- pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, nd, 0, 0);
- }
- nd = nd->next;
- }
- nd = find_devices("ethernet");
- while (nd) {
- if (nd->parent && device_is_compatible(nd, "gmac")
- && device_is_compatible(nd->parent, "uni-north"))
- pmac_call_feature(PMAC_FTR_GMAC_ENABLE, nd, 0, 0);
- nd = nd->next;
- }
-}
-
-void pmac_pci_fixup_cardbus(struct pci_dev* dev)
-{
- if (_machine != _MACH_Pmac)
- return;
- /*
- * Fix the interrupt routing on the various cardbus bridges
- * used on powerbooks
- */
- if (dev->vendor != PCI_VENDOR_ID_TI)
- return;
- if (dev->device == PCI_DEVICE_ID_TI_1130 ||
- dev->device == PCI_DEVICE_ID_TI_1131) {
- u8 val;
- /* Enable PCI interrupt */
- if (pci_read_config_byte(dev, 0x91, &val) == 0)
- pci_write_config_byte(dev, 0x91, val | 0x30);
- /* Disable ISA interrupt mode */
- if (pci_read_config_byte(dev, 0x92, &val) == 0)
- pci_write_config_byte(dev, 0x92, val & ~0x06);
- }
- if (dev->device == PCI_DEVICE_ID_TI_1210 ||
- dev->device == PCI_DEVICE_ID_TI_1211 ||
- dev->device == PCI_DEVICE_ID_TI_1410 ||
- dev->device == PCI_DEVICE_ID_TI_1510) {
- u8 val;
- /* 0x8c == TI122X_IRQMUX, 2 says to route the INTA
- signal out the MFUNC0 pin */
- if (pci_read_config_byte(dev, 0x8c, &val) == 0)
- pci_write_config_byte(dev, 0x8c, (val & ~0x0f) | 2);
- /* Disable ISA interrupt mode */
- if (pci_read_config_byte(dev, 0x92, &val) == 0)
- pci_write_config_byte(dev, 0x92, val & ~0x06);
- }
-}
-
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus);
-
-void pmac_pci_fixup_pciata(struct pci_dev* dev)
-{
- u8 progif = 0;
-
- /*
- * On PowerMacs, we try to switch any PCI ATA controller to
- * fully native mode
- */
- if (_machine != _MACH_Pmac)
- return;
- /* Some controllers don't have the class IDE */
- if (dev->vendor == PCI_VENDOR_ID_PROMISE)
- switch(dev->device) {
- case PCI_DEVICE_ID_PROMISE_20246:
- case PCI_DEVICE_ID_PROMISE_20262:
- case PCI_DEVICE_ID_PROMISE_20263:
- case PCI_DEVICE_ID_PROMISE_20265:
- case PCI_DEVICE_ID_PROMISE_20267:
- case PCI_DEVICE_ID_PROMISE_20268:
- case PCI_DEVICE_ID_PROMISE_20269:
- case PCI_DEVICE_ID_PROMISE_20270:
- case PCI_DEVICE_ID_PROMISE_20271:
- case PCI_DEVICE_ID_PROMISE_20275:
- case PCI_DEVICE_ID_PROMISE_20276:
- case PCI_DEVICE_ID_PROMISE_20277:
- goto good;
- }
- /* Others, check PCI class */
- if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
- return;
- good:
- pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
- if ((progif & 5) != 5) {
- printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n", pci_name(dev));
- (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
- if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
- (progif & 5) != 5)
- printk(KERN_ERR "Rewrite of PROGIF failed !\n");
- }
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
-
-
-/*
- * Disable second function on K2-SATA, it's broken
- * and disable IO BARs on first one
- */
-void pmac_pci_fixup_k2_sata(struct pci_dev* dev)
-{
- int i;
- u16 cmd;
-
- if (PCI_FUNC(dev->devfn) > 0) {
- pci_read_config_word(dev, PCI_COMMAND, &cmd);
- cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
- pci_write_config_word(dev, PCI_COMMAND, cmd);
- for (i = 0; i < 6; i++) {
- dev->resource[i].start = dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
- pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, 0);
- }
- } else {
- pci_read_config_word(dev, PCI_COMMAND, &cmd);
- cmd &= ~PCI_COMMAND_IO;
- pci_write_config_word(dev, PCI_COMMAND, cmd);
- for (i = 0; i < 5; i++) {
- dev->resource[i].start = dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
- pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, 0);
- }
- }
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, 0x0240, pmac_pci_fixup_k2_sata);
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