diff options
author | David Howells <dhowells@redhat.com> | 2010-01-08 23:43:20 +0100 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-01-11 18:34:10 +0100 |
commit | 112b4a0bf1080b3d40a2d3b3982361229b25e72d (patch) | |
tree | e9b49ac3df442cc469b0823378961d4d46b88bc5 /arch/mn10300/unit-asb2305/pci.c | |
parent | mn10300: use generic pci_enable_resources() (diff) | |
download | linux-112b4a0bf1080b3d40a2d3b3982361229b25e72d.tar.xz linux-112b4a0bf1080b3d40a2d3b3982361229b25e72d.zip |
mn10300: insert PCI root bus resources for the ASB2305 devel motherboard
Insert PCI root bus resources for the MN10300-based ASB2305 development
kit motherboard. This is required because the CPU's window onto the PCI
bus address space is considerably smaller than the CPU's full address
space and non-PCI devices lie outside of the PCI window that we might want
to access.
Without this patch, the PCI root bus uses the platform-level bus
resources, and these are then confined to the PCI window, thus making
platform_device_add() reject devices outside of this window.
We also add a reservation for the PCI SRAM region.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
-rw-r--r-- | arch/mn10300/unit-asb2305/pci.c | 57 |
1 files changed, 35 insertions, 22 deletions
diff --git a/arch/mn10300/unit-asb2305/pci.c b/arch/mn10300/unit-asb2305/pci.c index 02527ce10cb2..2cb7e75ba1c0 100644 --- a/arch/mn10300/unit-asb2305/pci.c +++ b/arch/mn10300/unit-asb2305/pci.c @@ -27,6 +27,29 @@ struct pci_bus *pci_root_bus; struct pci_ops *pci_root_ops; /* + * The accessible PCI window does not cover the entire CPU address space, but + * there are devices we want to access outside of that window, so we need to + * insert specific PCI bus resources instead of using the platform-level bus + * resources directly for the PCI root bus. + * + * These are configured and inserted by pcibios_init() and are attached to the + * root bus by pcibios_fixup_bus(). + */ +static struct resource pci_ioport_resource = { + .name = "PCI IO", + .start = 0xbe000000, + .end = 0xbe03ffff, + .flags = IORESOURCE_IO, +}; + +static struct resource pci_iomem_resource = { + .name = "PCI mem", + .start = 0xb8000000, + .end = 0xbbffffff, + .flags = IORESOURCE_MEM, +}; + +/* * Functions for accessing PCI configuration space */ @@ -297,6 +320,7 @@ static int __init pci_check_direct(void) printk(KERN_INFO "PCI: Using configuration ampci\n"); request_mem_region(0xBE040000, 256, "AMPCI bridge"); request_mem_region(0xBFFFFFF4, 12, "PCI ampci"); + request_mem_region(0xBC000000, 32 * 1024 * 1024, "PCI SRAM"); return 0; } @@ -358,6 +382,11 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus) { struct pci_dev *dev; + if (bus->number == 0) { + bus->resource[0] = &pci_ioport_resource; + bus->resource[1] = &pci_iomem_resource; + } + if (bus->self) { pci_read_bridge_bases(bus); pcibios_fixup_device_resources(bus->self); @@ -380,6 +409,11 @@ static int __init pcibios_init(void) iomem_resource.start = 0xA0000000; iomem_resource.end = 0xDFFFFFFF; + if (insert_resource(&iomem_resource, &pci_iomem_resource) < 0) + panic("Unable to insert PCI IOMEM resource\n"); + if (insert_resource(&ioport_resource, &pci_ioport_resource) < 0) + panic("Unable to insert PCI IOPORT resource\n"); + if (!pci_probe) return 0; @@ -391,32 +425,11 @@ static int __init pcibios_init(void) printk(KERN_INFO "PCI: Probing PCI hardware [mempage %08x]\n", MEM_PAGING_REG); - { -#if 0 - static struct pci_bus am33_root_bus = { - .children = LIST_HEAD_INIT(am33_root_bus.children), - .devices = LIST_HEAD_INIT(am33_root_bus.devices), - .number = 0, - .secondary = 0, - .resource = { &ioport_resource, &iomem_resource }, - }; - - am33_root_bus.ops = pci_root_ops; - list_add_tail(&am33_root_bus.node, &pci_root_buses); - - am33_root_bus.subordinate = pci_do_scan_bus(0); - - pci_root_bus = &am33_root_bus; -#else - pci_root_bus = pci_scan_bus(0, &pci_direct_ampci, NULL); -#endif - } + pci_root_bus = pci_scan_bus(0, &pci_direct_ampci, NULL); pcibios_irq_init(); pcibios_fixup_irqs(); -#if 0 pcibios_resource_survey(); -#endif return 0; } |