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>

1 files changed, 49 insertions, 5 deletions

diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 2b2f25e7fef5..b244696de1a3 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);
+}