| /* |
| * Common pmac/prep/chrp pci routines. -- Cort |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/pci.h> |
| #include <linux/delay.h> |
| #include <linux/string.h> |
| #include <linux/init.h> |
| #include <linux/capability.h> |
| #include <linux/sched.h> |
| #include <linux/errno.h> |
| #include <linux/bootmem.h> |
| #include <linux/irq.h> |
| #include <linux/list.h> |
| #include <linux/of.h> |
| #include <linux/slab.h> |
| #include <linux/export.h> |
| |
| #include <asm/processor.h> |
| #include <asm/io.h> |
| #include <asm/prom.h> |
| #include <asm/sections.h> |
| #include <asm/pci-bridge.h> |
| #include <asm/ppc-pci.h> |
| #include <asm/byteorder.h> |
| #include <asm/uaccess.h> |
| #include <asm/machdep.h> |
| |
| #undef DEBUG |
| |
| unsigned long isa_io_base = 0; |
| unsigned long pci_dram_offset = 0; |
| int pcibios_assign_bus_offset = 1; |
| |
| void pcibios_make_OF_bus_map(void); |
| |
| static void fixup_cpc710_pci64(struct pci_dev* dev); |
| static u8* pci_to_OF_bus_map; |
| |
| /* By default, we don't re-assign bus numbers. We do this only on |
| * some pmacs |
| */ |
| static int pci_assign_all_buses; |
| |
| static int pci_bus_count; |
| |
| /* This will remain NULL for now, until isa-bridge.c is made common |
| * to both 32-bit and 64-bit. |
| */ |
| struct pci_dev *isa_bridge_pcidev; |
| EXPORT_SYMBOL_GPL(isa_bridge_pcidev); |
| |
| static void |
| fixup_cpc710_pci64(struct pci_dev* dev) |
| { |
| /* Hide the PCI64 BARs from the kernel as their content doesn't |
| * fit well in the resource management |
| */ |
| dev->resource[0].start = dev->resource[0].end = 0; |
| dev->resource[0].flags = 0; |
| dev->resource[1].start = dev->resource[1].end = 0; |
| dev->resource[1].flags = 0; |
| } |
| DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixup_cpc710_pci64); |
| |
| /* |
| * Functions below are used on OpenFirmware machines. |
| */ |
| static void |
| make_one_node_map(struct device_node* node, u8 pci_bus) |
| { |
| const int *bus_range; |
| int len; |
| |
| if (pci_bus >= pci_bus_count) |
| return; |
| bus_range = of_get_property(node, "bus-range", &len); |
| if (bus_range == NULL || len < 2 * sizeof(int)) { |
| printk(KERN_WARNING "Can't get bus-range for %s, " |
| "assuming it starts at 0\n", node->full_name); |
| pci_to_OF_bus_map[pci_bus] = 0; |
| } else |
| pci_to_OF_bus_map[pci_bus] = bus_range[0]; |
| |
| for_each_child_of_node(node, node) { |
| struct pci_dev* dev; |
| const unsigned int *class_code, *reg; |
| |
| class_code = of_get_property(node, "class-code", NULL); |
| if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI && |
| (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) |
| continue; |
| reg = of_get_property(node, "reg", NULL); |
| if (!reg) |
| continue; |
| dev = pci_get_bus_and_slot(pci_bus, ((reg[0] >> 8) & 0xff)); |
| if (!dev || !dev->subordinate) { |
| pci_dev_put(dev); |
| continue; |
| } |
| make_one_node_map(node, dev->subordinate->number); |
| pci_dev_put(dev); |
| } |
| } |
| |
| void |
| pcibios_make_OF_bus_map(void) |
| { |
| int i; |
| struct pci_controller *hose, *tmp; |
| struct property *map_prop; |
| struct device_node *dn; |
| |
| pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL); |
| if (!pci_to_OF_bus_map) { |
| printk(KERN_ERR "Can't allocate OF bus map !\n"); |
| return; |
| } |
| |
| /* We fill the bus map with invalid values, that helps |
| * debugging. |
| */ |
| for (i=0; i<pci_bus_count; i++) |
| pci_to_OF_bus_map[i] = 0xff; |
| |
| /* For each hose, we begin searching bridges */ |
| list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
| struct device_node* node = hose->dn; |
| |
| if (!node) |
| continue; |
| make_one_node_map(node, hose->first_busno); |
| } |
| dn = of_find_node_by_path("/"); |
| map_prop = of_find_property(dn, "pci-OF-bus-map", NULL); |
| if (map_prop) { |
| BUG_ON(pci_bus_count > map_prop->length); |
| memcpy(map_prop->value, pci_to_OF_bus_map, pci_bus_count); |
| } |
| of_node_put(dn); |
| #ifdef DEBUG |
| printk("PCI->OF bus map:\n"); |
| for (i=0; i<pci_bus_count; i++) { |
| if (pci_to_OF_bus_map[i] == 0xff) |
| continue; |
| printk("%d -> %d\n", i, pci_to_OF_bus_map[i]); |
| } |
| #endif |
| } |
| |
| |
| /* |
| * Returns the PCI device matching a given OF node |
| */ |
| int pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn) |
| { |
| struct pci_dev *dev = NULL; |
| const __be32 *reg; |
| int size; |
| |
| /* Check if it might have a chance to be a PCI device */ |
| if (!pci_find_hose_for_OF_device(node)) |
| return -ENODEV; |
| |
| reg = of_get_property(node, "reg", &size); |
| if (!reg || size < 5 * sizeof(u32)) |
| return -ENODEV; |
| |
| *bus = (be32_to_cpup(®[0]) >> 16) & 0xff; |
| *devfn = (be32_to_cpup(®[0]) >> 8) & 0xff; |
| |
| /* Ok, here we need some tweak. If we have already renumbered |
| * all busses, we can't rely on the OF bus number any more. |
| * the pci_to_OF_bus_map is not enough as several PCI busses |
| * may match the same OF bus number. |
| */ |
| if (!pci_to_OF_bus_map) |
| return 0; |
| |
| for_each_pci_dev(dev) |
| if (pci_to_OF_bus_map[dev->bus->number] == *bus && |
| dev->devfn == *devfn) { |
| *bus = dev->bus->number; |
| pci_dev_put(dev); |
| return 0; |
| } |
| |
| return -ENODEV; |
| } |
| EXPORT_SYMBOL(pci_device_from_OF_node); |
| |
| /* We create the "pci-OF-bus-map" property now so it appears in the |
| * /proc device tree |
| */ |
| void __init |
| pci_create_OF_bus_map(void) |
| { |
| struct property* of_prop; |
| struct device_node *dn; |
| |
| of_prop = (struct property*) alloc_bootmem(sizeof(struct property) + 256); |
| if (!of_prop) |
| return; |
| dn = of_find_node_by_path("/"); |
| if (dn) { |
| memset(of_prop, -1, sizeof(struct property) + 256); |
| of_prop->name = "pci-OF-bus-map"; |
| of_prop->length = 256; |
| of_prop->value = &of_prop[1]; |
| of_add_property(dn, of_prop); |
| of_node_put(dn); |
| } |
| } |
| |
| void __devinit pcibios_setup_phb_io_space(struct pci_controller *hose) |
| { |
| unsigned long io_offset; |
| struct resource *res = &hose->io_resource; |
| |
| /* Fixup IO space offset */ |
| io_offset = pcibios_io_space_offset(hose); |
| res->start += io_offset; |
| res->end += io_offset; |
| } |
| |
| static int __init pcibios_init(void) |
| { |
| struct pci_controller *hose, *tmp; |
| int next_busno = 0; |
| |
| printk(KERN_INFO "PCI: Probing PCI hardware\n"); |
| |
| if (pci_has_flag(PCI_REASSIGN_ALL_BUS)) |
| pci_assign_all_buses = 1; |
| |
| /* Scan all of the recorded PCI controllers. */ |
| list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
| if (pci_assign_all_buses) |
| hose->first_busno = next_busno; |
| hose->last_busno = 0xff; |
| pcibios_scan_phb(hose); |
| pci_bus_add_devices(hose->bus); |
| if (pci_assign_all_buses || next_busno <= hose->last_busno) |
| next_busno = hose->last_busno + pcibios_assign_bus_offset; |
| } |
| pci_bus_count = next_busno; |
| |
| /* OpenFirmware based machines need a map of OF bus |
| * numbers vs. kernel bus numbers since we may have to |
| * remap them. |
| */ |
| if (pci_assign_all_buses) |
| pcibios_make_OF_bus_map(); |
| |
| /* Call common code to handle resource allocation */ |
| pcibios_resource_survey(); |
| |
| /* Call machine dependent post-init code */ |
| if (ppc_md.pcibios_after_init) |
| ppc_md.pcibios_after_init(); |
| |
| return 0; |
| } |
| |
| subsys_initcall(pcibios_init); |
| |
| static struct pci_controller* |
| pci_bus_to_hose(int bus) |
| { |
| struct pci_controller *hose, *tmp; |
| |
| list_for_each_entry_safe(hose, tmp, &hose_list, list_node) |
| if (bus >= hose->first_busno && bus <= hose->last_busno) |
| return hose; |
| return NULL; |
| } |
| |
| /* Provide information on locations of various I/O regions in physical |
| * memory. Do this on a per-card basis so that we choose the right |
| * root bridge. |
| * Note that the returned IO or memory base is a physical address |
| */ |
| |
| long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn) |
| { |
| struct pci_controller* hose; |
| long result = -EOPNOTSUPP; |
| |
| hose = pci_bus_to_hose(bus); |
| if (!hose) |
| return -ENODEV; |
| |
| switch (which) { |
| case IOBASE_BRIDGE_NUMBER: |
| return (long)hose->first_busno; |
| case IOBASE_MEMORY: |
| return (long)hose->pci_mem_offset; |
| case IOBASE_IO: |
| return (long)hose->io_base_phys; |
| case IOBASE_ISA_IO: |
| return (long)isa_io_base; |
| case IOBASE_ISA_MEM: |
| return (long)isa_mem_base; |
| } |
| |
| return result; |
| } |
| |
| |