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/*
* $Id: arctic-mtd.c,v 1.14 2005/11/07 11:14:26 gleixner Exp $
*
* drivers/mtd/maps/arctic-mtd.c MTD mappings and partition tables for
* IBM 405LP Arctic boards.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Copyright (C) 2002, International Business Machines Corporation
* All Rights Reserved.
*
* Bishop Brock
* IBM Research, Austin Center for Low-Power Computing
* bcbrock@us.ibm.com
* March 2002
*
* modified for Arctic by,
* David Gibson
* IBM OzLabs, Canberra, Australia
* <arctic@gibson.dropbear.id.au>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <asm/io.h>
#include <asm/ibm4xx.h>
/*
* 0 : 0xFE00 0000 - 0xFEFF FFFF : Filesystem 1 (16MiB)
* 1 : 0xFF00 0000 - 0xFF4F FFFF : kernel (5.12MiB)
* 2 : 0xFF50 0000 - 0xFFF5 FFFF : Filesystem 2 (10.624MiB) (if non-XIP)
* 3 : 0xFFF6 0000 - 0xFFFF FFFF : PIBS Firmware (640KiB)
*/
#define FFS1_SIZE 0x01000000 /* 16MiB */
#define KERNEL_SIZE 0x00500000 /* 5.12MiB */
#define FFS2_SIZE 0x00a60000 /* 10.624MiB */
#define FIRMWARE_SIZE 0x000a0000 /* 640KiB */
#define NAME "Arctic Linux Flash"
#define PADDR SUBZERO_BOOTFLASH_PADDR
#define BUSWIDTH 2
#define SIZE SUBZERO_BOOTFLASH_SIZE
#define PARTITIONS 4
/* Flash memories on these boards are memory resources, accessed big-endian. */
{
/* do nothing for now */
}
static struct map_info arctic_mtd_map = {
.name = NAME,
.size = SIZE,
.bankwidth = BUSWIDTH,
.phys = PADDR,
};
static struct mtd_info *arctic_mtd;
static struct mtd_partition arctic_partitions[PARTITIONS] = {
{ .name = "Filesystem",
.size = FFS1_SIZE,
.offset = 0,},
{ .name = "Kernel",
.size = KERNEL_SIZE,
.offset = FFS1_SIZE,},
{ .name = "Filesystem",
.size = FFS2_SIZE,
.offset = FFS1_SIZE + KERNEL_SIZE,},
{ .name = "Firmware",
.size = FIRMWARE_SIZE,
.offset = SUBZERO_BOOTFLASH_SIZE - FIRMWARE_SIZE,},
};
static int __init
init_arctic_mtd(void)
{
int err = 0;
printk("%s: 0x%08x at 0x%08x\n", NAME, SIZE, PADDR);
arctic_mtd_map.virt = ioremap(PADDR, SIZE);
if (!arctic_mtd_map.virt) {
printk("%s: failed to ioremap 0x%x\n", NAME, PADDR);
return -EIO;
}
simple_map_init(&arctic_mtd_map);
printk("%s: probing %d-bit flash bus\n", NAME, BUSWIDTH * 8);
arctic_mtd = do_map_probe("cfi_probe", &arctic_mtd_map);
if (!arctic_mtd) {
iounmap((void *) arctic_mtd_map.virt);
return -ENXIO;
}
arctic_mtd->owner = THIS_MODULE;
err = add_mtd_partitions(arctic_mtd, arctic_partitions, PARTITIONS);
if (err) {
printk("%s: add_mtd_partitions failed\n", NAME);
iounmap((void *) arctic_mtd_map.virt);
}
return err;
}
static void __exit
cleanup_arctic_mtd(void)
{
if (arctic_mtd) {
del_mtd_partitions(arctic_mtd);
map_destroy(arctic_mtd);
iounmap((void *) arctic_mtd_map.virt);
}
}
module_init(init_arctic_mtd);
module_exit(cleanup_arctic_mtd);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Gibson <arctic@gibson.dropbear.id.au>");
MODULE_DESCRIPTION("MTD map and partitions for IBM 405LP Arctic boards");
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