[PATCH 4/5] SH7720: MPR2: MTD mapping

[Markus B. <sup...@go...>]

Hi,

this adds a MTD mapping for the onboard NOR flash on the Magic Panel R2. 
The mapping module is based on the solutionengine mapping module.

Signed-off by: Markus Brunner <sup...@gm...>
Signed-off by: Mark Jonas <to...@gm...>
---
 Kconfig        |    6 +++
 Makefile       |    1
 magicpanelr2.c |   98 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 105 insertions(+)


--- sh-2.6-intc/drivers/mtd/maps/Kconfig	2007-07-31 12:11:48.000000000 +0200
+++ sh-2.6/drivers/mtd/maps/Kconfig	2007-08-16 16:24:29.000000000 +0200
@@ -407,6 +407,12 @@ config MTD_SOLUTIONENGINE
 	  This enables access to the flash chips on the Hitachi SolutionEngine and
 	  similar boards. Say 'Y' if you are building a kernel for such a board.
 
+config MTD_MAGICPANELR2
+	tristate "CFI Flash device mapped on Magic Panel R2"
+	depends on SUPERH && MTD_CFI && MTD_REDBOOT_PARTS
+	help
+	  This enables access to the flash chip on the Magic Panel R2.
+
 config MTD_ARM_INTEGRATOR
 	tristate "CFI Flash device mapped on ARM Integrator/P720T"
 	depends on ARM && MTD_CFI
--- sh-2.6-intc/drivers/mtd/maps/magicpanelr2.c	1970-01-01 01:00:00.000000000 +0100
+++ sh-2.6/drivers/mtd/maps/magicpanelr2.c	2007-08-17 14:30:37.000000000 +0200
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2007  Markus Brunner, Mark Jonas
+ *
+ * Flash on Magic Panel R2 board.
+ *
+ *   Based on solutionengine.c
+ *
+ *   (C) 2001 Red Hat, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/errno.h>
+#include <asm/magicpanelr2.h>
+
+static struct mtd_info *flash_mtd;
+
+struct map_info mpr2_flash_map = {
+	.name = "Magic Panel R2 Flash",
+	.size = 0x2000000UL,
+	.bankwidth = 2,
+};
+static struct mtd_partition *parsed_parts;
+
+static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
+
+static struct mtd_partition mpr2_partitions[] = {
+	/* Reserved for bootloader, read-only */
+	{
+		.name = "Bootloader",
+		.offset = 0x00000000UL,
+		.size = MPR2_MTD_BOOTLOADER_SIZE,
+		.mask_flags = MTD_WRITEABLE,
+	},
+	/* Reserved for kernel image */
+	{
+		.name = "Kernel Image",
+		.offset = MTDPART_OFS_NXTBLK,
+		.size = MPR2_MTD_KERNEL_SIZE,
+	},
+	/* Rest is used for Flash FS */
+	{
+		.name = "Flash FS",
+		.offset = MTDPART_OFS_NXTBLK,
+		.size = MTDPART_SIZ_FULL,
+	}
+};
+
+static int __init init_mpr2_maps(void)
+{
+	int nr_parts = 0;
+
+	/* Probe at offset 0 */
+	mpr2_flash_map.phys = 0x00000000UL;
+	mpr2_flash_map.virt = (void __iomem *)P2SEGADDR(0x00000000UL);
+	simple_map_init(&mpr2_flash_map);
+
+	flash_mtd = do_map_probe("cfi_probe", &mpr2_flash_map);
+
+	flash_mtd->owner = THIS_MODULE;
+
+	/* Check if there is a partition table */
+	nr_parts = parse_mtd_partitions(flash_mtd, probes, &parsed_parts, 0);
+
+	/* If there is no partition table, used the hard coded table */
+	if (nr_parts <= 0) {
+		parsed_parts = mpr2_partitions;
+		nr_parts = sizeof(mpr2_partitions)/sizeof(*parsed_parts);
+	}
+
+	/* Add partitions */
+	add_mtd_partitions(flash_mtd, parsed_parts, nr_parts);
+
+	return 0;
+}
+
+static void __exit cleanup_mpr2_maps(void)
+{
+	del_mtd_partitions(flash_mtd);
+	map_destroy(flash_mtd);
+}
+
+module_init(init_mpr2_maps);
+module_exit(cleanup_mpr2_maps);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mark Jonas <to...@gm...>");
+MODULE_DESCRIPTION("MTD map driver for Magic Panel R2");
--- sh-2.6-intc/drivers/mtd/maps/Makefile	2007-07-31 12:11:48.000000000 +0200
+++ sh-2.6/drivers/mtd/maps/Makefile	2007-08-14 13:23:32.000000000 +0200
@@ -71,3 +71,4 @@ obj-$(CONFIG_MTD_PLATRAM)	+= plat-ram.o
 obj-$(CONFIG_MTD_OMAP_NOR)	+= omap_nor.o
 obj-$(CONFIG_MTD_MTX1)		+= mtx-1_flash.o
 obj-$(CONFIG_MTD_TQM834x)	+= tqm834x.o
+obj-$(CONFIG_MTD_MAGICPANELR2)	+= magicpanelr2.o
\ No newline at end of file