diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/pci-bridge.h | 5 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/pci.h | 5 | ||||
| -rw-r--r-- | arch/powerpc/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/pci-common.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/pci_64.c | 289 | ||||
| -rw-r--r-- | arch/powerpc/kernel/pci_of_scan.c | 358 |
6 files changed, 364 insertions, 296 deletions
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h index 4c61fa0b8d7..3faf575f6b0 100644 --- a/arch/powerpc/include/asm/pci-bridge.h +++ b/arch/powerpc/include/asm/pci-bridge.h @@ -284,11 +284,6 @@ static inline int isa_vaddr_is_ioport(void __iomem *address) extern int pcibios_unmap_io_space(struct pci_bus *bus); extern int pcibios_map_io_space(struct pci_bus *bus); -/* Return values for ppc_md.pci_probe_mode function */ -#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */ -#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */ -#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */ - #ifdef CONFIG_NUMA #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE)) #else diff --git a/arch/powerpc/include/asm/pci.h b/arch/powerpc/include/asm/pci.h index 7ae46d7e270..b856a837b4a 100644 --- a/arch/powerpc/include/asm/pci.h +++ b/arch/powerpc/include/asm/pci.h @@ -22,6 +22,11 @@ #include <asm-generic/pci-dma-compat.h> +/* Return values for ppc_md.pci_probe_mode function */ +#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */ +#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */ +#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */ + #define PCIBIOS_MIN_IO 0x1000 #define PCIBIOS_MIN_MEM 0x10000000 diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 7c83edbc215..569f79ccd31 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -88,7 +88,7 @@ obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o pci64-$(CONFIG_PPC64) += pci_dn.o isa-bridge.o obj-$(CONFIG_PCI) += pci_$(CONFIG_WORD_SIZE).o $(pci64-y) \ - pci-common.o + pci-common.o pci_of_scan.o obj-$(CONFIG_PCI_MSI) += msi.o obj-$(CONFIG_KEXEC) += machine_kexec.o crash.o \ machine_kexec_$(CONFIG_WORD_SIZE).o diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 158a78ae634..725ea9144e3 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -1617,4 +1617,3 @@ void __devinit pcibios_setup_phb_resources(struct pci_controller *hose) (unsigned long)hose->io_base_virt - _IO_BASE); } - diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index 9e8902fa14c..4d5b4ced7e4 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -43,295 +43,6 @@ unsigned long pci_probe_only = 1; unsigned long pci_io_base = ISA_IO_BASE; EXPORT_SYMBOL(pci_io_base); -static u32 get_int_prop(struct device_node *np, const char *name, u32 def) -{ - const u32 *prop; - int len; - - prop = of_get_property(np, name, &len); - if (prop && len >= 4) - return *prop; - return def; -} - -static unsigned int pci_parse_of_flags(u32 addr0, int bridge) -{ - unsigned int flags = 0; - - if (addr0 & 0x02000000) { - flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY; - flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64; - flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M; - if (addr0 & 0x40000000) - flags |= IORESOURCE_PREFETCH - | PCI_BASE_ADDRESS_MEM_PREFETCH; - /* Note: We don't know whether the ROM has been left enabled - * by the firmware or not. We mark it as disabled (ie, we do - * not set the IORESOURCE_ROM_ENABLE flag) for now rather than - * do a config space read, it will be force-enabled if needed - */ - if (!bridge && (addr0 & 0xff) == 0x30) - flags |= IORESOURCE_READONLY; - } else if (addr0 & 0x01000000) - flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO; - if (flags) - flags |= IORESOURCE_SIZEALIGN; - return flags; -} - - -static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev) -{ - u64 base, size; - unsigned int flags; - struct resource *res; - const u32 *addrs; - u32 i; - int proplen; - - addrs = of_get_property(node, "assigned-addresses", &proplen); - if (!addrs) - return; - pr_debug(" parse addresses (%d bytes) @ %p\n", proplen, addrs); - for (; proplen >= 20; proplen -= 20, addrs += 5) { - flags = pci_parse_of_flags(addrs[0], 0); - if (!flags) - continue; - base = of_read_number(&addrs[1], 2); - size = of_read_number(&addrs[3], 2); - if (!size) - continue; - i = addrs[0] & 0xff; - pr_debug(" base: %llx, size: %llx, i: %x\n", - (unsigned long long)base, - (unsigned long long)size, i); - - if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) { - res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2]; - } else if (i == dev->rom_base_reg) { - res = &dev->resource[PCI_ROM_RESOURCE]; - flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE; - } else { - printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i); - continue; - } - res->start = base; - res->end = base + size - 1; - res->flags = flags; - res->name = pci_name(dev); - } -} - -struct pci_dev *of_create_pci_dev(struct device_node *node, - struct pci_bus *bus, int devfn) -{ - struct pci_dev *dev; - const char *type; - - dev = alloc_pci_dev(); - if (!dev) - return NULL; - type = of_get_property(node, "device_type", NULL); - if (type == NULL) - type = ""; - - pr_debug(" create device, devfn: %x, type: %s\n", devfn, type); - - dev->bus = bus; - dev->sysdata = node; - dev->dev.parent = bus->bridge; - dev->dev.bus = &pci_bus_type; - dev->devfn = devfn; - dev->multifunction = 0; /* maybe a lie? */ - - dev->vendor = get_int_prop(node, "vendor-id", 0xffff); - dev->device = get_int_prop(node, "device-id", 0xffff); - dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0); - dev->subsystem_device = get_int_prop(node, "subsystem-id", 0); - - dev->cfg_size = pci_cfg_space_size(dev); - - dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus), - dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); - dev->class = get_int_prop(node, "class-code", 0); - dev->revision = get_int_prop(node, "revision-id", 0); - - pr_debug(" class: 0x%x\n", dev->class); - pr_debug(" revision: 0x%x\n", dev->revision); - - dev->current_state = 4; /* unknown power state */ - dev->error_state = pci_channel_io_normal; - dev->dma_mask = 0xffffffff; - - if (!strcmp(type, "pci") || !strcmp(type, "pciex")) { - /* a PCI-PCI bridge */ - dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; - dev->rom_base_reg = PCI_ROM_ADDRESS1; - } else if (!strcmp(type, "cardbus")) { - dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; - } else { - dev->hdr_type = PCI_HEADER_TYPE_NORMAL; - dev->rom_base_reg = PCI_ROM_ADDRESS; - /* Maybe do a default OF mapping here */ - dev->irq = NO_IRQ; - } - - pci_parse_of_addrs(node, dev); - - pr_debug(" adding to system ...\n"); - - pci_device_add(dev, bus); - - return dev; -} -EXPORT_SYMBOL(of_create_pci_dev); - -static void __devinit __of_scan_bus(struct device_node *node, - struct pci_bus *bus, int rescan_existing) -{ - struct device_node *child; - const u32 *reg; - int reglen, devfn; - struct pci_dev *dev; - - pr_debug("of_scan_bus(%s) bus no %d... \n", - node->full_name, bus->number); - - /* Scan direct children */ - for_each_child_of_node(node, child) { - pr_debug(" * %s\n", child->full_name); - reg = of_get_property(child, "reg", ®len); - if (reg == NULL || reglen < 20) - continue; - devfn = (reg[0] >> 8) & 0xff; - - /* create a new pci_dev for this device */ - dev = of_create_pci_dev(child, bus, devfn); - if (!dev) - continue; - pr_debug(" dev header type: %x\n", dev->hdr_type); - } - - /* Apply all fixups necessary. We don't fixup the bus "self" - * for an existing bridge that is being rescanned - */ - if (!rescan_existing) - pcibios_setup_bus_self(bus); - pcibios_setup_bus_devices(bus); - - /* Now scan child busses */ - list_for_each_entry(dev, &bus->devices, bus_list) { - if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || - dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { - struct device_node *child = pci_device_to_OF_node(dev); - if (dev) - of_scan_pci_bridge(child, dev); - } - } -} - -void __devinit of_scan_bus(struct device_node *node, - struct pci_bus *bus) -{ - __of_scan_bus(node, bus, 0); -} -EXPORT_SYMBOL_GPL(of_scan_bus); - -void __devinit of_rescan_bus(struct device_node *node, - struct pci_bus *bus) -{ - __of_scan_bus(node, bus, 1); -} -EXPORT_SYMBOL_GPL(of_rescan_bus); - -void __devinit of_scan_pci_bridge(struct device_node *node, - struct pci_dev *dev) -{ - struct pci_bus *bus; - const u32 *busrange, *ranges; - int len, i, mode; - struct resource *res; - unsigned int flags; - u64 size; - - pr_debug("of_scan_pci_bridge(%s)\n", node->full_name); - - /* parse bus-range property */ - busrange = of_get_property(node, "bus-range", &len); - if (busrange == NULL || len != 8) { - printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n", - node->full_name); - return; - } - ranges = of_get_property(node, "ranges", &len); - if (ranges == NULL) { - printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n", - node->full_name); - return; - } - - bus = pci_add_new_bus(dev->bus, dev, busrange[0]); - if (!bus) { - printk(KERN_ERR "Failed to create pci bus for %s\n", - node->full_name); - return; - } - - bus->primary = dev->bus->number; - bus->subordinate = busrange[1]; - bus->bridge_ctl = 0; - bus->sysdata = node; - - /* parse ranges property */ - /* PCI #address-cells == 3 and #size-cells == 2 always */ - res = &dev->resource[PCI_BRIDGE_RESOURCES]; - for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) { - res->flags = 0; - bus->resource[i] = res; - ++res; - } - i = 1; - for (; len >= 32; len -= 32, ranges += 8) { - flags = pci_parse_of_flags(ranges[0], 1); - size = of_read_number(&ranges[6], 2); - if (flags == 0 || size == 0) - continue; - if (flags & IORESOURCE_IO) { - res = bus->resource[0]; - if (res->flags) { - printk(KERN_ERR "PCI: ignoring extra I/O range" - " for bridge %s\n", node->full_name); - continue; - } - } else { - if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) { - printk(KERN_ERR "PCI: too many memory ranges" - " for bridge %s\n", node->full_name); - continue; - } - res = bus->resource[i]; - ++i; - } - res->start = of_read_number(&ranges[1], 2); - res->end = res->start + size - 1; - res->flags = flags; - } - sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), - bus->number); - pr_debug(" bus name: %s\n", bus->name); - - mode = PCI_PROBE_NORMAL; - if (ppc_md.pci_probe_mode) - mode = ppc_md.pci_probe_mode(bus); - pr_debug(" probe mode: %d\n", mode); - - if (mode == PCI_PROBE_DEVTREE) - of_scan_bus(node, bus); - else if (mode == PCI_PROBE_NORMAL) - pci_scan_child_bus(bus); -} -EXPORT_SYMBOL(of_scan_pci_bridge); - void __devinit scan_phb(struct pci_controller *hose) { struct pci_bus *bus; diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c new file mode 100644 index 00000000000..72c31bcb7aa --- /dev/null +++ b/arch/powerpc/kernel/pci_of_scan.c @@ -0,0 +1,358 @@ +/* + * Helper routines to scan the device tree for PCI devices and busses + * + * Migrated out of PowerPC architecture pci_64.c file by Grant Likely + * <grant.likely@secretlab.ca> so that these routines are available for + * 32 bit also. + * + * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM + * Rework, based on alpha PCI code. + * Copyright (c) 2009 Secret Lab Technologies Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + */ + +#include <linux/pci.h> +#include <asm/pci-bridge.h> +#include <asm/prom.h> + +/** + * get_int_prop - Decode a u32 from a device tree property + */ +static u32 get_int_prop(struct device_node *np, const char *name, u32 def) +{ + const u32 *prop; + int len; + + prop = of_get_property(np, name, &len); + if (prop && len >= 4) + return *prop; + return def; +} + +/** + * pci_parse_of_flags - Parse the flags cell of a device tree PCI address + * @addr0: value of 1st cell of a device tree PCI address. + * @bridge: Set this flag if the address is from a bridge 'ranges' property + */ +unsigned int pci_parse_of_flags(u32 addr0, int bridge) +{ + unsigned int flags = 0; + + if (addr0 & 0x02000000) { + flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY; + flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64; + flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M; + if (addr0 & 0x40000000) + flags |= IORESOURCE_PREFETCH + | PCI_BASE_ADDRESS_MEM_PREFETCH; + /* Note: We don't know whether the ROM has been left enabled + * by the firmware or not. We mark it as disabled (ie, we do + * not set the IORESOURCE_ROM_ENABLE flag) for now rather than + * do a config space read, it will be force-enabled if needed + */ + if (!bridge && (addr0 & 0xff) == 0x30) + flags |= IORESOURCE_READONLY; + } else if (addr0 & 0x01000000) + flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO; + if (flags) + flags |= IORESOURCE_SIZEALIGN; + return flags; +} + +/** + * of_pci_parse_addrs - Parse PCI addresses assigned in the device tree node + * @node: device tree node for the PCI device + * @dev: pci_dev structure for the device + * + * This function parses the 'assigned-addresses' property of a PCI devices' + * device tree node and writes them into the associated pci_dev structure. + */ +static void of_pci_parse_addrs(struct device_node *node, struct pci_dev *dev) +{ + u64 base, size; + unsigned int flags; + struct resource *res; + const u32 *addrs; + u32 i; + int proplen; + + addrs = of_get_property(node, "assigned-addresses", &proplen); + if (!addrs) + return; + pr_debug(" parse addresses (%d bytes) @ %p\n", proplen, addrs); + for (; proplen >= 20; proplen -= 20, addrs += 5) { + flags = pci_parse_of_flags(addrs[0], 0); + if (!flags) + continue; + base = of_read_number(&addrs[1], 2); + size = of_read_number(&addrs[3], 2); + if (!size) + continue; + i = addrs[0] & 0xff; + pr_debug(" base: %llx, size: %llx, i: %x\n", + (unsigned long long)base, + (unsigned long long)size, i); + + if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) { + res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2]; + } else if (i == dev->rom_base_reg) { + res = &dev->resource[PCI_ROM_RESOURCE]; + flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE; + } else { + printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i); + continue; + } + res->start = base; + res->end = base + size - 1; + res->flags = flags; + res->name = pci_name(dev); + } +} + +/** + * of_create_pci_dev - Given a device tree node on a pci bus, create a pci_dev + * @node: device tree node pointer + * @bus: bus the device is sitting on + * @devfn: PCI function number, extracted from device tree by caller. + */ +struct pci_dev *of_create_pci_dev(struct device_node *node, + struct pci_bus *bus, int devfn) +{ + struct pci_dev *dev; + const char *type; + + dev = alloc_pci_dev(); + if (!dev) + return NULL; + type = of_get_property(node, "device_type", NULL); + if (type == NULL) + type = ""; + + pr_debug(" create device, devfn: %x, type: %s\n", devfn, type); + + dev->bus = bus; + dev->sysdata = node; + dev->dev.parent = bus->bridge; + dev->dev.bus = &pci_bus_type; + dev->devfn = devfn; + dev->multifunction = 0; /* maybe a lie? */ + + dev->vendor = get_int_prop(node, "vendor-id", 0xffff); + dev->device = get_int_prop(node, "device-id", 0xffff); + dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0); + dev->subsystem_device = get_int_prop(node, "subsystem-id", 0); + + dev->cfg_size = pci_cfg_space_size(dev); + + dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus), + dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); + dev->class = get_int_prop(node, "class-code", 0); + dev->revision = get_int_prop(node, "revision-id", 0); + + pr_debug(" class: 0x%x\n", dev->class); + pr_debug(" revision: 0x%x\n", dev->revision); + + dev->current_state = 4; /* unknown power state */ + dev->error_state = pci_channel_io_normal; + dev->dma_mask = 0xffffffff; + + if (!strcmp(type, "pci") || !strcmp(type, "pciex")) { + /* a PCI-PCI bridge */ + dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; + dev->rom_base_reg = PCI_ROM_ADDRESS1; + } else if (!strcmp(type, "cardbus")) { + dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; + } else { + dev->hdr_type = PCI_HEADER_TYPE_NORMAL; + dev->rom_base_reg = PCI_ROM_ADDRESS; + /* Maybe do a default OF mapping here */ + dev->irq = NO_IRQ; + } + + of_pci_parse_addrs(node, dev); + + pr_debug(" adding to system ...\n"); + + pci_device_add(dev, bus); + + return dev; +} +EXPORT_SYMBOL(of_create_pci_dev); + +/** + * of_scan_pci_bridge - Set up a PCI bridge and scan for child nodes + * @node: device tree node of bridge + * @dev: pci_dev structure for the bridge + * + * of_scan_bus() calls this routine for each PCI bridge that it finds, and + * this routine in turn call of_scan_bus() recusively to scan for more child + * devices. + */ +void __devinit of_scan_pci_bridge(struct device_node *node, + struct pci_dev *dev) +{ + struct pci_bus *bus; + const u32 *busrange, *ranges; + int len, i, mode; + struct resource *res; + unsigned int flags; + u64 size; + + pr_debug("of_scan_pci_bridge(%s)\n", node->full_name); + + /* parse bus-range property */ + busrange = of_get_property(node, "bus-range", &len); + if (busrange == NULL || len != 8) { + printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n", + node->full_name); + return; + } + ranges = of_get_property(node, "ranges", &len); + if (ranges == NULL) { + printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n", + node->full_name); + return; + } + + bus = pci_add_new_bus(dev->bus, dev, busrange[0]); + if (!bus) { + printk(KERN_ERR "Failed to create pci bus for %s\n", + node->full_name); + return; + } + + bus->primary = dev->bus->number; + bus->subordinate = busrange[1]; + bus->bridge_ctl = 0; + bus->sysdata = node; + + /* parse ranges property */ + /* PCI #address-cells == 3 and #size-cells == 2 always */ + res = &dev->resource[PCI_BRIDGE_RESOURCES]; + for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) { + res->flags = 0; + bus->resource[i] = res; + ++res; + } + i = 1; + for (; len >= 32; len -= 32, ranges += 8) { + flags = pci_parse_of_flags(ranges[0], 1); + size = of_read_number(&ranges[6], 2); + if (flags == 0 || size == 0) + continue; + if (flags & IORESOURCE_IO) { + res = bus->resource[0]; + if (res->flags) { + printk(KERN_ERR "PCI: ignoring extra I/O range" + " for bridge %s\n", node->full_name); + continue; + } + } else { + if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) { + printk(KERN_ERR "PCI: too many memory ranges" + " for bridge %s\n", node->full_name); + continue; + } + res = bus->resource[i]; + ++i; + } + res->start = of_read_number(&ranges[1], 2); + res->end = res->start + size - 1; + res->flags = flags; + } + sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), + bus->number); + pr_debug(" bus name: %s\n", bus->name); + + mode = PCI_PROBE_NORMAL; + if (ppc_md.pci_probe_mode) + mode = ppc_md.pci_probe_mode(bus); + pr_debug(" probe mode: %d\n", mode); + + if (mode == PCI_PROBE_DEVTREE) + of_scan_bus(node, bus); + else if (mode == PCI_PROBE_NORMAL) + pci_scan_child_bus(bus); +} +EXPORT_SYMBOL(of_scan_pci_bridge); + +/** + * __of_scan_bus - given a PCI bus node, setup bus and scan for child devices + * @node: device tree node for the PCI bus + * @bus: pci_bus structure for the PCI bus + * @rescan_existing: Flag indicating bus has already been set up + */ +static void __devinit __of_scan_bus(struct device_node *node, + struct pci_bus *bus, int rescan_existing) +{ + struct device_node *child; + const u32 *reg; + int reglen, devfn; + struct pci_dev *dev; + + pr_debug("of_scan_bus(%s) bus no %d... \n", + node->full_name, bus->number); + + /* Scan direct children */ + for_each_child_of_node(node, child) { + pr_debug(" * %s\n", child->full_name); + reg = of_get_property(child, "reg", ®len); + if (reg == NULL || reglen < 20) + continue; + devfn = (reg[0] >> 8) & 0xff; + + /* create a new pci_dev for this device */ + dev = of_create_pci_dev(child, bus, devfn); + if (!dev) + continue; + pr_debug(" dev header type: %x\n", dev->hdr_type); + } + + /* Apply all fixups necessary. We don't fixup the bus "self" + * for an existing bridge that is being rescanned + */ + if (!rescan_existing) + pcibios_setup_bus_self(bus); + pcibios_setup_bus_devices(bus); + + /* Now scan child busses */ + list_for_each_entry(dev, &bus->devices, bus_list) { + if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || + dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { + struct device_node *child = pci_device_to_OF_node(dev); + if (dev) + of_scan_pci_bridge(child, dev); + } + } +} + +/** + * of_scan_bus - given a PCI bus node, setup bus and scan for child devices + * @node: device tree node for the PCI bus + * @bus: pci_bus structure for the PCI bus + */ +void __devinit of_scan_bus(struct device_node *node, + struct pci_bus *bus) +{ + __of_scan_bus(node, bus, 0); +} +EXPORT_SYMBOL_GPL(of_scan_bus); + +/** + * of_rescan_bus - given a PCI bus node, scan for child devices + * @node: device tree node for the PCI bus + * @bus: pci_bus structure for the PCI bus + * + * Same as of_scan_bus, but for a pci_bus structure that has already been + * setup. + */ +void __devinit of_rescan_bus(struct device_node *node, + struct pci_bus *bus) +{ + __of_scan_bus(node, bus, 1); +} +EXPORT_SYMBOL_GPL(of_rescan_bus); + |