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/*
* drivers/mtd/maps/dmv182.c
*
* Flash map driver for the Dy4 SVME182 board
*
* Copyright 2003-2004, TimeSys Corporation
*
* Based on the SVME181 flash map, by Tom Nelson, Dot4, Inc. for TimeSys Corp.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/errno.h>
/*
* This driver currently handles only the 16MiB user flash bank 1 on the
* board. It does not provide access to bank 0 (contains the Dy4 FFW), bank 2
* (VxWorks boot), or the optional 48MiB expansion flash.
*
* scott.wood@timesys.com: On the newer boards with 128MiB flash, it
* now supports the first 96MiB (the boot flash bank containing FFW
* is excluded). The VxWorks loader is in partition 1.
*/
#define FLASH_BASE_ADDR 0xf0000000
#define FLASH_BANK_SIZE (128*1024*1024)
MODULE_AUTHOR("Scott Wood, TimeSys Corporation <scott.wood@timesys.com>");
MODULE_DESCRIPTION("User-programmable flash device on the Dy4 SVME182 board");
MODULE_LICENSE("GPL");
static struct map_info svme182_map = {
.name = "Dy4 SVME182",
.bankwidth = 32,
.size = 128 * 1024 * 1024
};
#define BOOTIMAGE_PART_SIZE ((6*1024*1024)-RESERVED_PART_SIZE)
// Allow 6MiB for the kernel
#define NEW_BOOTIMAGE_PART_SIZE (6 * 1024 * 1024)
// Allow 1MiB for the bootloader
#define NEW_BOOTLOADER_PART_SIZE (1024 * 1024)
// Use the remaining 9MiB at the end of flash for the RFS
#define NEW_RFS_PART_SIZE (0x01000000 - NEW_BOOTLOADER_PART_SIZE - \
NEW_BOOTIMAGE_PART_SIZE)
static struct mtd_partition svme182_partitions[] = {
// The Lower PABS is only 128KiB, but the partition code doesn't
// like partitions that don't end on the largest erase block
// size of the device, even if all of the erase blocks in the
// partition are small ones. The hardware should prevent
// writes to the actual PABS areas.
{
name: "Lower PABS and CPU 0 bootloader or kernel",
size: 6*1024*1024,
offset: 0,
},
{
name: "Root Filesystem",
size: 10*1024*1024,
offset: MTDPART_OFS_NXTBLK
},
{
name: "CPU1 Bootloader",
size: 1024*1024,
offset: MTDPART_OFS_NXTBLK,
},
{
name: "Extra",
size: 110*1024*1024,
offset: MTDPART_OFS_NXTBLK
},
{
name: "Foundation Firmware and Upper PABS",
size: 1024*1024,
offset: MTDPART_OFS_NXTBLK,
mask_flags: MTD_WRITEABLE // read-only
}
};
static struct mtd_info *this_mtd;
static int __init init_svme182(void)
{
struct mtd_partition *partitions;
int num_parts = ARRAY_SIZE(svme182_partitions);
partitions = svme182_partitions;
svme182_map.virt = ioremap(FLASH_BASE_ADDR, svme182_map.size);
if (svme182_map.virt == 0) {
printk("Failed to ioremap FLASH memory area.\n");
return -EIO;
}
simple_map_init(&svme182_map);
this_mtd = do_map_probe("cfi_probe", &svme182_map);
if (!this_mtd)
{
iounmap((void *)svme182_map.virt);
return -ENXIO;
}
printk(KERN_NOTICE "SVME182 flash device: %dMiB at 0x%08x\n",
this_mtd->size >> 20, FLASH_BASE_ADDR);
this_mtd->owner = THIS_MODULE;
mtd_device_register(this_mtd, partitions, num_parts);
return 0;
}
static void __exit cleanup_svme182(void)
{
if (this_mtd)
{
mtd_device_unregister(this_mtd);
map_destroy(this_mtd);
}
if (svme182_map.virt)
{
iounmap((void *)svme182_map.virt);
svme182_map.virt = 0;
}
return;
}
module_init(init_svme182);
module_exit(cleanup_svme182);
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