/* * $Id: arctic-mtd.c,v 1.2 2007/09/21 03:09:24 quy 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 __initinit_arctic_mtd(void){	printk("%s: 0x%08x at 0x%08x\n", NAME, SIZE, PADDR);	arctic_mtd_map.virt = (unsigned long) 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)		return -ENXIO;	arctic_mtd->owner = THIS_MODULE;	return add_mtd_partitions(arctic_mtd, arctic_partitions, PARTITIONS);}static void __exitcleanup_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");