mn10300: add platform MTD support for the ASB2303 board

Add platform MTD support for the ASB2303 board.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 105 insertions, 2 deletions

diff --git a/arch/mn10300/configs/asb2303_defconfig b/arch/mn10300/configs/asb2303_defconfig
index 0189a058da9f..ca9876a111d3 100644
--- a/arch/mn10300/configs/asb2303_defconfig
+++ b/arch/mn10300/configs/asb2303_defconfig
@@ -282,7 +282,10 @@ CONFIG_MTD_CFI_UTIL=y
 # Mapping drivers for chip access
 #
 # CONFIG_MTD_COMPLEX_MAPPINGS is not set
-# CONFIG_MTD_PHYSMAP is not set
+CONFIG_MTD_PHYSMAP=y
+CONFIG_MTD_PHYSMAP_START=0x8000000
+CONFIG_MTD_PHYSMAP_LEN=0x0
+CONFIG_MTD_PHYSMAP_BANKWIDTH=2
 # CONFIG_MTD_PLATRAM is not set
 
 #
diff --git a/arch/mn10300/unit-asb2303/Makefile b/arch/mn10300/unit-asb2303/Makefile
index 03e579fa99d0..38a5bb43b0bb 100644
--- a/arch/mn10300/unit-asb2303/Makefile
+++ b/arch/mn10300/unit-asb2303/Makefile
@@ -3,4 +3,4 @@
 # Makefile for the ASB2303 board
 #
 ###############################################################################
-obj-y   := unit-init.o smc91111.o leds.o
+obj-y   := unit-init.o smc91111.o flash.o leds.o
diff --git a/arch/mn10300/unit-asb2303/flash.c b/arch/mn10300/unit-asb2303/flash.c
new file mode 100644
index 000000000000..17fe083fcb6f
--- /dev/null
+++ b/arch/mn10300/unit-asb2303/flash.c
@@ -0,0 +1,100 @@
+/* Handle mapping of the flash on the ASB2303 board
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+
+#define ASB2303_PROM_ADDR       0xA0000000      /* Boot PROM */
+#define ASB2303_PROM_SIZE       (2 * 1024 * 1024)
+#define ASB2303_FLASH_ADDR      0xA4000000      /* System Flash */
+#define ASB2303_FLASH_SIZE      (32 * 1024 * 1024)
+#define ASB2303_CONFIG_ADDR     0xA6000000      /* System Config EEPROM */
+#define ASB2303_CONFIG_SIZE     (8 * 1024)
+
+/*
+ * default MTD partition table for both main flash devices, expected to be
+ * overridden by RedBoot
+ */
+static struct mtd_partition asb2303_partitions[] = {
+        {
+                .name           = "Bootloader",
+                .size           = 0x00040000,
+                .offset         = 0,
+                .mask_flags     = MTD_CAP_ROM /* force read-only */
+        }, {
+                .name           = "Kernel",
+                .size           = 0x00400000,
+                .offset         = 0x00040000,
+        }, {
+                .name           = "Filesystem",
+                .size           = MTDPART_SIZ_FULL,
+                .offset         = 0x00440000
+        }
+};
+
+/*
+ * the ASB2303 Boot PROM definition
+ */
+static struct physmap_flash_data asb2303_bootprom_data = {
+        .width          = 2,
+        .nr_parts       = 1,
+        .parts          = asb2303_partitions,
+};
+
+static struct resource asb2303_bootprom_resource = {
+        .start          = ASB2303_PROM_ADDR,
+        .end            = ASB2303_PROM_ADDR + ASB2303_PROM_SIZE,
+        .flags          = IORESOURCE_MEM,
+};
+
+static struct platform_device asb2303_bootprom = {
+        .name           = "physmap-flash",
+        .id             = 0,
+        .dev.platform_data = &asb2303_bootprom_data,
+        .num_resources  = 1,
+        .resource       = &asb2303_bootprom_resource,
+};
+
+/*
+ * the ASB2303 System Flash definition
+ */
+static struct physmap_flash_data asb2303_sysflash_data = {
+        .width          = 4,
+        .nr_parts       = 1,
+        .parts          = asb2303_partitions,
+};
+
+static struct resource asb2303_sysflash_resource = {
+        .start          = ASB2303_FLASH_ADDR,
+        .end            = ASB2303_FLASH_ADDR + ASB2303_FLASH_SIZE,
+        .flags          = IORESOURCE_MEM,
+};
+
+static struct platform_device asb2303_sysflash = {
+        .name           = "physmap-flash",
+        .id             = 1,
+        .dev.platform_data = &asb2303_sysflash_data,
+        .num_resources  = 1,
+        .resource       = &asb2303_sysflash_resource,
+};
+
+/*
+ * register the ASB2303 flashes
+ */
+static int __init asb2303_mtd_init(void)
+{
+        platform_device_register(&asb2303_bootprom);
+        platform_device_register(&asb2303_sysflash);
+        return 0;
+}
+
+module_init(asb2303_mtd_init);