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authorArnd Bergmann <arnd@arndb.de>2012-08-13 16:56:29 +0200
committerArnd Bergmann <arnd@arndb.de>2012-08-13 16:56:29 +0200
commit19ec6caca2da706f11646249ba280177fec359fa (patch)
tree6064421bc4924e7debdc8576a187cbdec4b8c352 /arch/arm/kernel/bios32.c
parent0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (diff)
parentdd9bf78040fa0da4cecc228e1682b9682b8cb180 (diff)
Merge branch 'cleanup/io-pci' into next/cleanups
From Rob Herring <robherring2@gmail.com>: This is the 2nd part of mach/io.h removals. This series removes io.h on platforms with PCI by creating a fixed virtual I/O mapping and a common __io() macro. This version has changed a bit to accommodate Tegra converting its PCIe host to a platform driver. Now the virtual space is only reserved during early boot before .map_io() is called. The mapping is not created until calling pci_ioremap_io which can be done at any point after vmalloc is initialized. I've gone back to fixed 64K windows for each PCI bus. This allows removing all the i/o resource setup from the individually platforms and placing it within the common ARM PCI code. I've only tested versatilepb under qemu (with the model hacked up to actually enable i/o space), so any testing is appreciated. iop3xx and mv78xx0 have some risk of breaking as the PCI bus addresses are moved to 0 from matching the cpu host bus addesss. * cleanup/io-pci: ARM: iop3xx: use fixed PCI i/o mapping ARM: mv78xx0: use fixed pci i/o mapping ARM: iop13xx: use fixed PCI i/o mapping iop13xx: use more regular PCI I/O space handling ARM: orion5x: use fixed PCI i/o mapping ARM: kirkwood: use fixed PCI i/o mapping ARM: dove: use fixed PCI i/o mapping ARM: footbridge: use fixed PCI i/o mapping ARM: shark: use fixed PCI i/o mapping ARM: integrator: remove trailing whitespace on pci_v3.c ARM: integrator: use fixed PCI i/o mapping ARM: tegra: use fixed PCI i/o mapping ARM: versatile: use fixed PCI i/o mapping ARM: move PCI i/o resource setup into common code ARM: Add fixed PCI i/o mapping i2c: iop3xx: use standard gpiolib functions i2c: iop3xx: clean-up trailing whitespace Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/kernel/bios32.c')
-rw-r--r--arch/arm/kernel/bios32.c54
1 files changed, 49 insertions, 5 deletions
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 2b2f25e7fef..b244696de1a 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -13,6 +13,7 @@
#include <linux/io.h>
#include <asm/mach-types.h>
+#include <asm/mach/map.h>
#include <asm/mach/pci.h>
static int debug_pci;
@@ -423,6 +424,38 @@ static int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
return irq;
}
+static int __init pcibios_init_resources(int busnr, struct pci_sys_data *sys)
+{
+ int ret;
+ struct pci_host_bridge_window *window;
+
+ if (list_empty(&sys->resources)) {
+ pci_add_resource_offset(&sys->resources,
+ &iomem_resource, sys->mem_offset);
+ }
+
+ list_for_each_entry(window, &sys->resources, list) {
+ if (resource_type(window->res) == IORESOURCE_IO)
+ return 0;
+ }
+
+ sys->io_res.start = (busnr * SZ_64K) ? : pcibios_min_io;
+ sys->io_res.end = (busnr + 1) * SZ_64K - 1;
+ sys->io_res.flags = IORESOURCE_IO;
+ sys->io_res.name = sys->io_res_name;
+ sprintf(sys->io_res_name, "PCI%d I/O", busnr);
+
+ ret = request_resource(&ioport_resource, &sys->io_res);
+ if (ret) {
+ pr_err("PCI: unable to allocate I/O port region (%d)\n", ret);
+ return ret;
+ }
+ pci_add_resource_offset(&sys->resources, &sys->io_res,
+ sys->io_offset);
+
+ return 0;
+}
+
static void __init pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
{
struct pci_sys_data *sys = NULL;
@@ -445,11 +478,10 @@ static void __init pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
ret = hw->setup(nr, sys);
if (ret > 0) {
- if (list_empty(&sys->resources)) {
- pci_add_resource_offset(&sys->resources,
- &ioport_resource, sys->io_offset);
- pci_add_resource_offset(&sys->resources,
- &iomem_resource, sys->mem_offset);
+ ret = pcibios_init_resources(nr, sys);
+ if (ret) {
+ kfree(sys);
+ break;
}
if (hw->scan)
@@ -627,3 +659,15 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
return 0;
}
+
+void __init pci_map_io_early(unsigned long pfn)
+{
+ struct map_desc pci_io_desc = {
+ .virtual = PCI_IO_VIRT_BASE,
+ .type = MT_DEVICE,
+ .length = SZ_64K,
+ };
+
+ pci_io_desc.pfn = pfn;
+ iotable_init(&pci_io_desc, 1);
+}