mn10300: add platform MTD support for the ASB2303 board

[sfrench/cifs-2.6.git] / arch / mn10300 / unit-asb2303 / flash.c

diff --git a/arch/mn10300/unit-asb2303/flash.c b/arch/mn10300/unit-asb2303/flash.c
new file mode 100644 (file)
index 0000000..17fe083
--- /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);