flash.c
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/* 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);