diff options
Diffstat (limited to 'arch/ppc/platforms/pmac_pci.c')
| -rw-r--r-- | arch/ppc/platforms/pmac_pci.c | 1124 |
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 786295b6ddd004..00000000000000 --- 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 = ¯isc_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 = ¯isc_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 = ¯isc_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); |