ARM: footbridge: use fixed PCI i/o mapping

Move footbridge PCI to fixed i/o mapping. io.h is still needed for the
!MMU case.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3dfc555..7215ebf 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -431,7 +431,7 @@ config ARCH_FOOTBRIDGE
        select FOOTBRIDGE
        select GENERIC_CLOCKEVENTS
        select HAVE_IDE
-       select NEED_MACH_IO_H
+       select NEED_MACH_IO_H if !MMU
        select NEED_MACH_MEMORY_H
        help
          Support for systems based on the DC21285 companion chip

diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c
index 3e6aaa6..a42b369 100644 (file)
--- a/arch/arm/mach-footbridge/common.c
+++ b/arch/arm/mach-footbridge/common.c
@@ -15,7 +15,7 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/spinlock.h>
- 
+
 #include <asm/pgtable.h>
 #include <asm/page.h>
 #include <asm/irq.h>
@@ -26,6 +26,7 @@
 
 #include <asm/mach/irq.h>
 #include <asm/mach/map.h>
+#include <asm/mach/pci.h>
 
 #include "common.h"
 
@@ -175,11 +176,6 @@ static struct map_desc ebsa285_host_io_desc[] __initdata = {
                .pfn            = __phys_to_pfn(DC21285_PCI_IACK),
                .length         = PCIIACK_SIZE,
                .type           = MT_DEVICE,
-       }, {
-               .virtual        = PCIO_BASE,
-               .pfn            = __phys_to_pfn(DC21285_PCI_IO),
-               .length         = PCIO_SIZE,
-               .type           = MT_DEVICE,
        },
 #endif
 };
@@ -196,8 +192,10 @@ void __init footbridge_map_io(void)
         * Now, work out what we've got to map in addition on this
         * platform.
         */
-       if (footbridge_cfn_mode())
+       if (footbridge_cfn_mode()) {
                iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
+               pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO));
+       }
 }
 
 void footbridge_restart(char mode, const char *cmd)

diff --git a/arch/arm/mach-footbridge/dc21285.c b/arch/arm/mach-footbridge/dc21285.c
index 9d62e33..a7cd2cf 100644 (file)
--- a/arch/arm/mach-footbridge/dc21285.c
+++ b/arch/arm/mach-footbridge/dc21285.c
@@ -276,8 +276,8 @@ int __init dc21285_setup(int nr, struct pci_sys_data *sys)
 
        sys->mem_offset  = DC21285_PCI_MEM;
 
-       pci_add_resource_offset(&sys->resources,
-                               &ioport_resource, sys->io_offset);
+       pci_ioremap_io(0, DC21285_PCI_IO);
+
        pci_add_resource_offset(&sys->resources, &res[0], sys->mem_offset);
        pci_add_resource_offset(&sys->resources, &res[1], sys->mem_offset);
 
@@ -298,7 +298,7 @@ void __init dc21285_preinit(void)
        mem_size = (unsigned int)high_memory - PAGE_OFFSET;
        for (mem_mask = 0x00100000; mem_mask < 0x10000000; mem_mask <<= 1)
                if (mem_mask >= mem_size)
-                       break;          
+                       break;
 
        /*
         * These registers need to be set up whether we're the
@@ -350,14 +350,6 @@ void __init dc21285_preinit(void)
                            "PCI data parity", NULL);
 
        if (cfn_mode) {
-               static struct resource csrio;
-
-               csrio.flags  = IORESOURCE_IO;
-               csrio.name   = "Footbridge";
-
-               allocate_resource(&ioport_resource, &csrio, 128,
-                                 0xff00, 0xffff, 128, NULL, NULL);
-
                /*
                 * Map our SDRAM at a known address in PCI space, just in case
                 * the firmware had other ideas.  Using a nonzero base is
@@ -365,7 +357,7 @@ void __init dc21285_preinit(void)
                 * in the range 0x000a0000 to 0x000c0000. (eg, S3 cards).
                 */
                *CSR_PCICSRBASE       = 0xf4000000;
-               *CSR_PCICSRIOBASE     = csrio.start;
+               *CSR_PCICSRIOBASE     = 0;
                *CSR_PCISDRAMBASE     = __virt_to_bus(PAGE_OFFSET);
                *CSR_PCIROMBASE       = 0;
                *CSR_PCICMD = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |

diff --git a/arch/arm/mach-footbridge/include/mach/debug-macro.S b/arch/arm/mach-footbridge/include/mach/debug-macro.S
index e5acde2..c169f0c 100644 (file)
--- a/arch/arm/mach-footbridge/include/mach/debug-macro.S
+++ b/arch/arm/mach-footbridge/include/mach/debug-macro.S
@@ -17,7 +17,8 @@
        /* For NetWinder debugging */
                .macro  addruart, rp, rv, tmp
                mov     \rp, #0x000003f8
-               orr     \rv, \rp, #0xff000000   @ virtual
+               orr     \rv, \rp, #0xfe000000   @ virtual
+               orr     \rv, \rv, #0x00e00000   @ virtual
                orr     \rp, \rp, #0x7c000000   @ physical
                .endm
 

diff --git a/arch/arm/mach-footbridge/include/mach/io.h b/arch/arm/mach-footbridge/include/mach/io.h
index aba531e..aba4638 100644 (file)
--- a/arch/arm/mach-footbridge/include/mach/io.h
+++ b/arch/arm/mach-footbridge/include/mach/io.h
@@ -14,18 +14,10 @@
 #ifndef __ASM_ARM_ARCH_IO_H
 #define __ASM_ARM_ARCH_IO_H
 
-#ifdef CONFIG_MMU
-#define MMU_IO(a, b)   (a)
-#else
-#define MMU_IO(a, b)   (b)
-#endif
-
-#define PCIO_SIZE       0x00100000
-#define PCIO_BASE       MMU_IO(0xff000000, 0x7c000000)
-
 /*
- * Translation of various region addresses to virtual addresses
+ * Translation of various i/o addresses to host addresses for !CONFIG_MMU
  */
+#define PCIO_BASE       0x7c000000
 #define __io(a)                        ((void __iomem *)(PCIO_BASE + (a)))
 
 #endif