[ARM] 4182/1: iop3xx: fix the ioremap implementation to not remap static ranges

Implement a custom ioremap implementation for iop3xx. This saves
establishing new mappings. It also cleans up the PCI IO resource to be a
physical address rather than a virtual address as Russell pointed out on
the original iop13xx port.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 62 insertions, 4 deletions

diff --git a/arch/arm/plat-iop/Makefile b/arch/arm/plat-iop/Makefile
index 23da00b1151..ed91463967a 100644
--- a/arch/arm/plat-iop/Makefile
+++ b/arch/arm/plat-iop/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the linux kernel.
 #
 
-obj-y			:= gpio.o i2c.o pci.o setup.o time.o
+obj-y			:= gpio.o i2c.o pci.o setup.o time.o io.o
 obj-m			:=
 obj-n			:=
 obj-			:=
diff --git a/arch/arm/plat-iop/io.c b/arch/arm/plat-iop/io.c
new file mode 100644
index 00000000000..f7eccecf2e4
--- /dev/null
+++ b/arch/arm/plat-iop/io.c
@@ -0,0 +1,58 @@
+/*
+ * iop3xx custom ioremap implementation
+ * Copyright (c) 2006, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+
+void * __iomem __iop3xx_ioremap(unsigned long cookie, size_t size,
+	unsigned long flags)
+{
+	void __iomem * retval;
+
+	switch (cookie) {
+	case IOP3XX_PCI_LOWER_IO_PA ... IOP3XX_PCI_UPPER_IO_PA:
+		retval = (void *) IOP3XX_PCI_IO_PHYS_TO_VIRT(cookie);
+		break;
+	case IOP3XX_PERIPHERAL_PHYS_BASE ... IOP3XX_PERIPHERAL_UPPER_PA:
+		retval = (void *) IOP3XX_PMMR_PHYS_TO_VIRT(cookie);
+		break;
+	default:
+		retval = __ioremap(cookie, size, flags);
+	}
+
+	return retval;
+}
+EXPORT_SYMBOL(__iop3xx_ioremap);
+
+void __iop3xx_iounmap(void __iomem *addr)
+{
+	extern void __iounmap(volatile void __iomem *addr);
+
+	switch ((u32) addr) {
+	case IOP3XX_PCI_LOWER_IO_VA ... IOP3XX_PCI_UPPER_IO_VA:
+	case IOP3XX_PERIPHERAL_VIRT_BASE ... IOP3XX_PERIPHERAL_UPPER_VA:
+		goto skip;
+	}
+	__iounmap(addr);
+
+skip:
+	return;
+}
+EXPORT_SYMBOL(__iop3xx_iounmap);
diff --git a/arch/arm/plat-iop/pci.c b/arch/arm/plat-iop/pci.c
index e647812654f..b5f6ec35aaf 100644
--- a/arch/arm/plat-iop/pci.c
+++ b/arch/arm/plat-iop/pci.c
@@ -196,8 +196,8 @@ int iop3xx_pci_setup(int nr, struct pci_sys_data *sys)
 	if (!res)
 		panic("PCI: unable to alloc resources");
 
-	res[0].start = IOP3XX_PCI_LOWER_IO_VA;
-	res[0].end   = IOP3XX_PCI_LOWER_IO_VA + IOP3XX_PCI_IO_WINDOW_SIZE - 1;
+	res[0].start = IOP3XX_PCI_LOWER_IO_PA;
+	res[0].end   = IOP3XX_PCI_LOWER_IO_PA + IOP3XX_PCI_IO_WINDOW_SIZE - 1;
 	res[0].name  = "IOP3XX PCI I/O Space";
 	res[0].flags = IORESOURCE_IO;
 	request_resource(&ioport_resource, &res[0]);
@@ -209,7 +209,7 @@ int iop3xx_pci_setup(int nr, struct pci_sys_data *sys)
 	request_resource(&iomem_resource, &res[1]);
 
 	sys->mem_offset = IOP3XX_PCI_LOWER_MEM_PA - IOP3XX_PCI_LOWER_MEM_BA;
-	sys->io_offset  = IOP3XX_PCI_LOWER_IO_VA - IOP3XX_PCI_LOWER_IO_BA;
+	sys->io_offset  = IOP3XX_PCI_LOWER_IO_PA - IOP3XX_PCI_LOWER_IO_BA;
 
 	sys->resource[0] = &res[0];
 	sys->resource[1] = &res[1];