openwrt/target/linux/sibyte/patches-3.3/101-rhone_physmap.patch

--- a/arch/mips/sibyte/swarm/platform.c
+++ b/arch/mips/sibyte/swarm/platform.c
@@ -5,6 +5,7 @@
 #include <linux/platform_device.h>
 #include <linux/ata_platform.h>
 
+#include <asm/addrspace.h>
 #include <asm/sibyte/board.h>
 #include <asm/sibyte/sb1250_genbus.h>
 #include <asm/sibyte/sb1250_regs.h>
@@ -137,3 +138,71 @@ static int __init sb1250_device_init(voi
 	return ret;
 }
 device_initcall(sb1250_device_init);
+
+#ifdef CONFIG_SIBYTE_RHONE
+
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+
+/* The board has 16MB flash but CFE sets up only 2MB */
+#define PHYS_TO_K1(a) CKSEG1ADDR(a)
+#define BOOTROM_SIZE 0x100
+
+static void fixup_cs0_size(void)
+{
+	SBWRITECSR(((A_IO_EXT_CS_BASE(0)) + R_IO_EXT_MULT_SIZE), BOOTROM_SIZE);
+}
+
+static struct mtd_partition flash_parts[] = {
+	{
+		.name           = "cfe",
+		.offset         = 0x00000000,
+		.size           = 0x00200000,
+		.mask_flags     = MTD_WRITEABLE,
+	},
+	{
+		.name           = "os",
+		.offset         = 0x00200000,
+		.size           = 0x00d00000,
+	},
+	{
+		.name           = "environment",
+		.offset         = 0x00f00000,
+		.size           = 0x00100000,
+		.mask_flags     = MTD_WRITEABLE,
+	},
+};
+
+static struct physmap_flash_data flash_data = {
+	.width		= 1,
+	.nr_parts	= ARRAY_SIZE(flash_parts),
+	.parts		= flash_parts,
+};
+
+static struct resource flash_resource = {
+	.start		= 0x1fc00000,
+	.end		= 0x20bfffff,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device flash_device = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.resource	= &flash_resource,
+	.num_resources	= 1,
+	.dev		= {
+		.platform_data = &flash_data,
+	},
+};
+
+static int __init flash_setup(void)
+{
+	fixup_cs0_size();
+	platform_device_register(&flash_device);
+
+	return 0;
+};
+
+device_initcall(flash_setup);
+
+#endif /* CONFIG_SIBYTE_RHONE */