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>

4 files changed, 27 insertions, 81 deletions

diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
index 9148b229d0de..70f7d712d6f4 100644
--- a/arch/arm/mach-orion5x/common.c
+++ b/arch/arm/mach-orion5x/common.c
@@ -47,16 +47,6 @@ static struct map_desc orion5x_io_desc[] __initdata = {
                 .length         = ORION5X_REGS_SIZE,
                 .type           = MT_DEVICE,
         }, {
-                .virtual        = ORION5X_PCIE_IO_VIRT_BASE,
-                .pfn            = __phys_to_pfn(ORION5X_PCIE_IO_PHYS_BASE),
-                .length         = ORION5X_PCIE_IO_SIZE,
-                .type           = MT_DEVICE,
-        }, {
-                .virtual        = ORION5X_PCI_IO_VIRT_BASE,
-                .pfn            = __phys_to_pfn(ORION5X_PCI_IO_PHYS_BASE),
-                .length         = ORION5X_PCI_IO_SIZE,
-                .type           = MT_DEVICE,
-        }, {
                 .virtual        = ORION5X_PCIE_WA_VIRT_BASE,
                 .pfn            = __phys_to_pfn(ORION5X_PCIE_WA_PHYS_BASE),
                 .length         = ORION5X_PCIE_WA_SIZE,
diff --git a/arch/arm/mach-orion5x/include/mach/io.h b/arch/arm/mach-orion5x/include/mach/io.h
deleted file mode 100644
index 1aa5d0a50a0b..000000000000
--- a/arch/arm/mach-orion5x/include/mach/io.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * arch/arm/mach-orion5x/include/mach/io.h
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#ifndef __ASM_ARCH_IO_H
-#define __ASM_ARCH_IO_H
-
-#include <mach/orion5x.h>
-#include <asm/sizes.h>
-
-#define IO_SPACE_LIMIT          SZ_2M
-static inline void __iomem *__io(unsigned long addr)
-{
-        return (void __iomem *)(addr + ORION5X_PCIE_IO_VIRT_BASE);
-}
-
-#define __io(a)                  __io(a)
-#endif
diff --git a/arch/arm/mach-orion5x/include/mach/orion5x.h b/arch/arm/mach-orion5x/include/mach/orion5x.h
index 683e085ce162..1b60131b7f60 100644
--- a/arch/arm/mach-orion5x/include/mach/orion5x.h
+++ b/arch/arm/mach-orion5x/include/mach/orion5x.h
@@ -31,31 +31,29 @@
  * fc000000     device bus mappings (cs0/cs1)
  *
  * virt         phys            size
- * fdd00000     f1000000        1M      on-chip peripheral registers
- * fde00000     f2000000        1M      PCIe I/O space
- * fdf00000     f2100000        1M      PCI I/O space
- * fe000000     f0000000        16M     PCIe WA space (Orion-1/Orion-NAS only)
+ * fe000000     f1000000        1M      on-chip peripheral registers
+ * fee00000     f2000000        64K     PCIe I/O space
+ * fee10000     f2100000        64K     PCI I/O space
+ * fd000000     f0000000        16M     PCIe WA space (Orion-1/Orion-NAS only)
  ****************************************************************************/
 #define ORION5X_REGS_PHYS_BASE          0xf1000000
-#define ORION5X_REGS_VIRT_BASE          0xfdd00000
+#define ORION5X_REGS_VIRT_BASE          0xfe000000
 #define ORION5X_REGS_SIZE               SZ_1M
 
 #define ORION5X_PCIE_IO_PHYS_BASE       0xf2000000
-#define ORION5X_PCIE_IO_VIRT_BASE       0xfde00000
 #define ORION5X_PCIE_IO_BUS_BASE        0x00000000
-#define ORION5X_PCIE_IO_SIZE            SZ_1M
+#define ORION5X_PCIE_IO_SIZE            SZ_64K
 
 #define ORION5X_PCI_IO_PHYS_BASE        0xf2100000
-#define ORION5X_PCI_IO_VIRT_BASE        0xfdf00000
-#define ORION5X_PCI_IO_BUS_BASE         0x00100000
-#define ORION5X_PCI_IO_SIZE             SZ_1M
+#define ORION5X_PCI_IO_BUS_BASE         0x00010000
+#define ORION5X_PCI_IO_SIZE             SZ_64K
 
 #define ORION5X_SRAM_PHYS_BASE          (0xf2200000)
 #define ORION5X_SRAM_SIZE               SZ_8K
 
 /* Relevant only for Orion-1/Orion-NAS */
 #define ORION5X_PCIE_WA_PHYS_BASE       0xf0000000
-#define ORION5X_PCIE_WA_VIRT_BASE       0xfe000000
+#define ORION5X_PCIE_WA_VIRT_BASE       0xfd000000
 #define ORION5X_PCIE_WA_SIZE            SZ_16M
 
 #define ORION5X_PCIE_MEM_PHYS_BASE      0xe0000000
diff --git a/arch/arm/mach-orion5x/pci.c b/arch/arm/mach-orion5x/pci.c
index cb19e1661bb3..6921d49b988d 100644
--- a/arch/arm/mach-orion5x/pci.c
+++ b/arch/arm/mach-orion5x/pci.c
@@ -162,35 +162,25 @@ static int __init pcie_setup(struct pci_sys_data *sys)
                 pcie_ops.read = pcie_rd_conf_wa;
         }
 
+        pci_ioremap_io(sys->busnr * SZ_64K, ORION5X_PCIE_IO_PHYS_BASE);
+
         /*
          * Request resources.
          */
-        res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL);
+        res = kzalloc(sizeof(struct resource), GFP_KERNEL);
         if (!res)
                 panic("pcie_setup unable to alloc resources");
 
         /*
-         * IORESOURCE_IO
-         */
-        sys->io_offset = 0;
-        res[0].name = "PCIe I/O Space";
-        res[0].flags = IORESOURCE_IO;
-        res[0].start = ORION5X_PCIE_IO_BUS_BASE;
-        res[0].end = res[0].start + ORION5X_PCIE_IO_SIZE - 1;
-        if (request_resource(&ioport_resource, &res[0]))
-                panic("Request PCIe IO resource failed\n");
-        pci_add_resource_offset(&sys->resources, &res[0], sys->io_offset);
-
-        /*
          * IORESOURCE_MEM
          */
-        res[1].name = "PCIe Memory Space";
-        res[1].flags = IORESOURCE_MEM;
-        res[1].start = ORION5X_PCIE_MEM_PHYS_BASE;
-        res[1].end = res[1].start + ORION5X_PCIE_MEM_SIZE - 1;
-        if (request_resource(&iomem_resource, &res[1]))
+        res->name = "PCIe Memory Space";
+        res->flags = IORESOURCE_MEM;
+        res->start = ORION5X_PCIE_MEM_PHYS_BASE;
+        res->end = res->start + ORION5X_PCIE_MEM_SIZE - 1;
+        if (request_resource(&iomem_resource, res))
                 panic("Request PCIe Memory resource failed\n");
-        pci_add_resource_offset(&sys->resources, &res[1], sys->mem_offset);
+        pci_add_resource_offset(&sys->resources, res, sys->mem_offset);
 
         return 1;
 }
@@ -489,35 +479,25 @@ static int __init pci_setup(struct pci_sys_data *sys)
          */
         orion5x_setbits(PCI_CMD, PCI_CMD_HOST_REORDER);
 
+        pci_ioremap_io(sys->busnr * SZ_64K, ORION5X_PCI_IO_PHYS_BASE);
+
         /*
          * Request resources
          */
-        res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL);
+        res = kzalloc(sizeof(struct resource), GFP_KERNEL);
         if (!res)
                 panic("pci_setup unable to alloc resources");
 
         /*
-         * IORESOURCE_IO
-         */
-        sys->io_offset = 0;
-        res[0].name = "PCI I/O Space";
-        res[0].flags = IORESOURCE_IO;
-        res[0].start = ORION5X_PCI_IO_BUS_BASE;
-        res[0].end = res[0].start + ORION5X_PCI_IO_SIZE - 1;
-        if (request_resource(&ioport_resource, &res[0]))
-                panic("Request PCI IO resource failed\n");
-        pci_add_resource_offset(&sys->resources, &res[0], sys->io_offset);
-
-        /*
          * IORESOURCE_MEM
          */
-        res[1].name = "PCI Memory Space";
-        res[1].flags = IORESOURCE_MEM;
-        res[1].start = ORION5X_PCI_MEM_PHYS_BASE;
-        res[1].end = res[1].start + ORION5X_PCI_MEM_SIZE - 1;
-        if (request_resource(&iomem_resource, &res[1]))
+        res->name = "PCI Memory Space";
+        res->flags = IORESOURCE_MEM;
+        res->start = ORION5X_PCI_MEM_PHYS_BASE;
+        res->end = res->start + ORION5X_PCI_MEM_SIZE - 1;
+        if (request_resource(&iomem_resource, res))
                 panic("Request PCI Memory resource failed\n");
-        pci_add_resource_offset(&sys->resources, &res[1], sys->mem_offset);
+        pci_add_resource_offset(&sys->resources, res, sys->mem_offset);
 
         return 1;
 }