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diff -urN linux.old/drivers/mtd/nand/Kconfig linux.dev/drivers/mtd/nand/Kconfig
--- linux.old/drivers/mtd/nand/Kconfig 2006-11-29 22:57:37.000000000 +0100
+++ linux.dev/drivers/mtd/nand/Kconfig 2006-12-14 04:38:51.000000000 +0100
@@ -75,6 +75,12 @@
help
Support for NAND flash on Technologic Systems TS-7250 platform.
+config MTD_NAND_RB500
+ tristate "NAND Flash device on RB500 board"
+ depends on MTD_NAND
+ help
+ Support for NAND flash on RB500 platform.
+
config MTD_NAND_IDS
tristate
diff -urN linux.old/drivers/mtd/nand/Makefile linux.dev/drivers/mtd/nand/Makefile
--- linux.old/drivers/mtd/nand/Makefile 2006-11-29 22:57:37.000000000 +0100
+++ linux.dev/drivers/mtd/nand/Makefile 2006-12-14 04:38:51.000000000 +0100
@@ -9,6 +9,7 @@
obj-$(CONFIG_MTD_NAND_SPIA) += spia.o
obj-$(CONFIG_MTD_NAND_AMS_DELTA) += ams-delta.o
obj-$(CONFIG_MTD_NAND_TOTO) += toto.o
+obj-$(CONFIG_MTD_NAND_RB500) += rbmipsnand.o
obj-$(CONFIG_MTD_NAND_AUTCPU12) += autcpu12.o
obj-$(CONFIG_MTD_NAND_EDB7312) += edb7312.o
obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o
diff -urN linux.old/drivers/mtd/nand/rbmipsnand.c linux.dev/drivers/mtd/nand/rbmipsnand.c
--- linux.old/drivers/mtd/nand/rbmipsnand.c 1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/drivers/mtd/nand/rbmipsnand.c 2006-12-14 04:39:52.000000000 +0100
@@ -0,0 +1,137 @@
+#include <linux/init.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/bootinfo.h>
+
+#define IDT434_REG_BASE ((volatile void *) KSEG1ADDR(0x18000000))
+
+#define GPIOF 0x050000
+#define GPIOC 0x050004
+#define GPIOD 0x050008
+
+#define GPIO_RDY (1 << 0x08)
+#define GPIO_WPX (1 << 0x09)
+#define GPIO_ALE (1 << 0x0a)
+#define GPIO_CLE (1 << 0x0b)
+
+#define DEV2BASE 0x010020
+
+#define LO_WPX (1 << 0)
+#define LO_ALE (1 << 1)
+#define LO_CLE (1 << 2)
+#define LO_CEX (1 << 3)
+#define LO_FOFF (1 << 5)
+#define LO_SPICS (1 << 6)
+#define LO_ULED (1 << 7)
+
+#define MEM32(x) *((volatile unsigned *) (x))
+static void __iomem *p_nand;
+
+extern void changeLatchU5(unsigned char orMask, unsigned char nandMask);
+
+static int rb500_dev_ready(struct mtd_info *mtd)
+{
+ return MEM32(IDT434_REG_BASE + GPIOD) & GPIO_RDY;
+}
+
+/*
+ * hardware specific access to control-lines
+ *
+ * ctrl:
+ * NAND_CLE: bit 2 -> bit 3
+ * NAND_ALE: bit 3 -> bit 2
+ */
+static void rbmips_hwcontrol500(struct mtd_info *mtd, int cmd,
+ unsigned int ctrl)
+{
+ struct nand_chip *chip = mtd->priv;
+ unsigned char orbits, nandbits;
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+
+ orbits = (ctrl & NAND_CLE) << 1;
+ orbits |= (ctrl & NAND_ALE) >> 1;
+
+ nandbits = (~ctrl & NAND_CLE) << 1;
+ nandbits |= (~ctrl & NAND_ALE) >> 1;
+
+ changeLatchU5(orbits, nandbits);
+ }
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, chip->IO_ADDR_W);
+
+}
+
+static struct mtd_partition partition_info[] = {
+ {
+ name:"RouterBoard NAND Boot",
+ offset:0,
+ size:4 * 1024 * 1024},
+ {
+ name:"RouterBoard NAND Main",
+ offset:MTDPART_OFS_NXTBLK,
+ size:MTDPART_SIZ_FULL}
+};
+
+static struct mtd_info rmtd;
+static struct nand_chip rnand;
+
+static unsigned init_ok = 0;
+
+unsigned get_rbnand_block_size(void)
+{
+ if (init_ok)
+ return rmtd.writesize;
+ else
+ return 0;
+}
+
+EXPORT_SYMBOL(get_rbnand_block_size);
+
+int __init rbmips_init(void)
+{
+ int *b;
+ memset(&rmtd, 0, sizeof(rmtd));
+ memset(&rnand, 0, sizeof(rnand));
+
+ printk("RB500 nand\n");
+ changeLatchU5(LO_WPX | LO_FOFF | LO_CEX,
+ LO_ULED | LO_ALE | LO_CLE);
+ rnand.cmd_ctrl = rbmips_hwcontrol500;
+
+ rnand.dev_ready = rb500_dev_ready;
+ rnand.IO_ADDR_W = (unsigned char *)
+ KSEG1ADDR(MEM32(IDT434_REG_BASE + DEV2BASE));
+ rnand.IO_ADDR_R = rnand.IO_ADDR_W;
+
+ p_nand = (void __iomem *) ioremap((void *) 0x18a20000, 0x1000);
+ if (!p_nand) {
+ printk("RBnand Unable ioremap buffer");
+ return -ENXIO;
+ }
+ rnand.ecc.mode = NAND_ECC_SOFT;
+ rnand.chip_delay = 25;
+ rnand.options |= NAND_NO_AUTOINCR;
+ rmtd.priv = &rnand;
+
+ b = (int *) KSEG1ADDR(0x18010020);
+ printk("dev2base 0x%08x mask 0x%08x c 0x%08x tc 0x%08x\n", b[0],
+ b[1], b[2], b[3]);
+
+ if (nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)
+ && nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)) {
+ printk("RBxxx nand device not found\n");
+ iounmap((void *) p_nand);
+ return -ENXIO;
+ }
+
+ add_mtd_partitions(&rmtd, partition_info, 2);
+ init_ok = 1;
+ return 0;
+}
+
+module_init(rbmips_init);
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