[MTD] Add initial support for OneNAND flash chips

OneNAND is a new flash technology from Samsung with integrated SRAM
buffers and logic interface.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

8 files changed, 1990 insertions, 6 deletions

diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index 843a1cbe0866..3dbfbafb3481 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -1,4 +1,4 @@
-# $Id: Kconfig,v 1.9 2005/06/16 08:49:29 sean Exp $
+# $Id: Kconfig,v 1.10 2005/07/11 10:39:27 gleixner Exp $
 
 menu "Memory Technology Devices (MTD)"
 
@@ -259,9 +259,9 @@ config RFD_FTL
         ---help---
           This provides support for the flash translation layer known 
           as the Resident Flash Disk (RFD), as used by the Embedded BIOS 
-          of General Software.
-          See http://www.gensw.com/pages/prod/bios/rfd.htm for further
-          information.
+          of General Software. There is a blurb at:
+
+                http://www.gensw.com/pages/prod/bios/rfd.htm
 
 source "drivers/mtd/chips/Kconfig"
 
@@ -271,5 +271,7 @@ source "drivers/mtd/devices/Kconfig"
 
 source "drivers/mtd/nand/Kconfig"
 
+source "drivers/mtd/onenand/Kconfig"
+
 endmenu
 
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index cb16b7d478ce..fc9374407c2b 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -1,7 +1,7 @@
 #
 # Makefile for the memory technology device drivers.
 #
-# $Id: Makefile.common,v 1.6 2005/06/16 08:49:29 sean Exp $
+# $Id: Makefile.common,v 1.7 2005/07/11 10:39:27 gleixner Exp $
 
 # Core functionality.
 mtd-y                           := mtdcore.o
@@ -25,4 +25,4 @@ obj-$(CONFIG_RFD_FTL)		+= rfd_ftl.o mtd_blkdevs.o
 nftl-objs               := nftlcore.o nftlmount.o
 inftl-objs              := inftlcore.o inftlmount.o
 
-obj-y           += chips/ maps/ devices/ nand/
+obj-y           += chips/ maps/ devices/ nand/ onenand/
diff --git a/drivers/mtd/onenand/Kconfig b/drivers/mtd/onenand/Kconfig
new file mode 100644
index 000000000000..7d76ede984d8
--- /dev/null
+++ b/drivers/mtd/onenand/Kconfig
@@ -0,0 +1,32 @@
+#
+# linux/drivers/mtd/onenand/Kconfig
+#
+
+menu "OneNAND Flash Device Drivers (EXPERIMENTAL)"
+        depends on MTD != n && EXPERIMENTAL
+
+config MTD_ONENAND
+        tristate "OneNAND Device Support"
+        depends on MTD
+        help
+          This enables support for accessing all type of OneNAND flash
+          devices. For further information see
+          <http://www.samsung.com/Products/Semiconductor/Flash/OneNAND_TM/index.htm>.
+
+config MTD_ONENAND_VERIFY_WRITE
+        bool "Verify OneNAND page writes"
+        depends on MTD_ONENAND
+        help
+          This adds an extra check when data is written to the flash. The
+          OneNAND flash device internally checks only bits transitioning
+          from 1 to 0. There is a rare possibility that even though the
+          device thinks the write was successful, a bit could have been
+          flipped accidentaly due to device wear or something else.
+
+config MTD_ONENAND_OMAP
+        tristate "OneNAND Flash device on OMAP board"
+        depends on ARCH_OMAP && MTD_ONENAND
+        help
+          Support for OneNAND flash on TI OMAP board.
+
+endmenu
diff --git a/drivers/mtd/onenand/Makefile b/drivers/mtd/onenand/Makefile
new file mode 100644
index 000000000000..f4e75864d8b5
--- /dev/null
+++ b/drivers/mtd/onenand/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for the OneNAND MTD
+#
+
+# Core functionality.
+obj-$(CONFIG_MTD_ONENAND)               += onenand_base.o
+
+# Board specific.
+obj-$(CONFIG_MTD_ONENAND_OMAP)          += omap-onenand.o
diff --git a/drivers/mtd/onenand/omap-onenand.c b/drivers/mtd/onenand/omap-onenand.c
new file mode 100644
index 000000000000..56e1aec6b835
--- /dev/null
+++ b/drivers/mtd/onenand/omap-onenand.c
@@ -0,0 +1,178 @@
+/*
+ *  linux/drivers/mtd/onenand/omap-onenand.c
+ *
+ *  Copyright (c) 2005 Samsung Electronics
+ *  Kyungmin Park <kyungmin.park@samsung.com>
+ *
+ *  Derived from linux/drivers/mtd/nand/omap-nand-flash.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  Overview:
+ *   This is a device driver for the OneNAND flash device for TI OMAP boards.
+ */
+
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/onenand.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/tc.h>
+#include <asm/sizes.h>
+
+#define OMAP_ONENAND_FLASH_START1       OMAP_CS2A_PHYS
+#define OMAP_ONENAND_FLASH_START2       OMAP_CS0_PHYS
+/*
+ * MTD structure for OMAP board
+ */
+static struct mtd_info *omap_onenand_mtd = NULL;
+
+/*
+ * Define partitions for flash devices
+ */
+
+#ifdef CONFIG_MTD_PARTITIONS
+static struct mtd_partition static_partition[] = {
+        {
+                .name           = "X-Loader + U-Boot",
+                .offset         = 0,
+                .size           = SZ_128K,
+                .mask_flags     = MTD_WRITEABLE /* force read-only */
+        },
+        {
+                .name           = "U-Boot Environment",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_128K,
+                .mask_flags     = MTD_WRITEABLE /* force read-only */
+        },
+        {
+                .name           = "kernel",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = 2 * SZ_1M
+        },
+        {
+                .name           = "filesystem0",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_16M,
+        },
+        {
+                .name           = "filesystem1",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = MTDPART_SIZ_FULL,
+        },
+};
+
+const char *part_probes[] = { "cmdlinepart", NULL,  };
+
+#endif
+
+/* Scan to find existance of the device at base.
+   This also allocates oob and data internal buffers */
+static char onenand_name[] = "onenand";
+
+/*
+ * Main initialization routine
+ */
+static int __init omap_onenand_init (void)
+{
+        struct onenand_chip *this;