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authorRob Herring <rob.herring@calxeda.com>2012-07-09 21:59:03 -0500
committerRob Herring <rob.herring@calxeda.com>2012-07-26 09:09:17 -0500
commit3c5d1699887bfcd17e6d9842ba7e2b3234e665db (patch)
tree67704d14f9877622c305fee05ced1af7cee0654a /arch
parentc2794437091a4fda72c4a4f3567dd728dcc0c3c9 (diff)
ARM: move PCI i/o resource setup into common code
With consolidation of the PCI i/o mappings, the i/o space is being set to start at a PCI bus addr of 0x0 and fixed to 64K per bus. In this case the core ARM PCI setup code can setup the i/o resource. Currently, the resource is only setup if the platform did not setup an i/o resource. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/mach/pci.h3
-rw-r--r--arch/arm/kernel/bios32.c41
2 files changed, 39 insertions, 5 deletions
diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
index df818876fa3..db9fedb57f2 100644
--- a/arch/arm/include/asm/mach/pci.h
+++ b/arch/arm/include/asm/mach/pci.h
@@ -11,6 +11,7 @@
#ifndef __ASM_MACH_PCI_H
#define __ASM_MACH_PCI_H
+#include <linux/ioport.h>
struct pci_sys_data;
struct pci_ops;
@@ -43,6 +44,8 @@ struct pci_sys_data {
unsigned long io_offset; /* bus->cpu IO mapping offset */
struct pci_bus *bus; /* PCI bus */
struct list_head resources; /* root bus resources (apertures) */
+ struct resource io_res;
+ char io_res_name[12];
/* Bridge swizzling */
u8 (*swizzle)(struct pci_dev *, u8 *);
/* IRQ mapping */
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index c3165f0fef6..036f7ea5812 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -424,6 +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;
@@ -446,11 +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)