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