/* netsc520.c -- MTD map driver for AMD NetSc520 Demonstration Board * * Copyright (C) 2001 Mark Langsdorf (mark.langsdorf@amd.com) * based on sc520cdp.c by Sysgo Real-Time Solutions GmbH * * $Id: netsc520.c,v 1.13 2004/11/28 09:40:40 dwmw2 Exp $ * * 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 * * The NetSc520 is a demonstration board for the Elan Sc520 processor available * from AMD. It has a single back of 16 megs of 32-bit Flash ROM and another * 16 megs of SDRAM. */ #include <linux/module.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/init.h> #include <asm/io.h> #include <linux/mtd/mtd.h> #include <linux/mtd/map.h> #include <linux/mtd/partitions.h> /* ** The single, 16 megabyte flash bank is divided into four virtual ** partitions. The first partition is 768 KiB and is intended to ** store the kernel image loaded by the bootstrap loader. The second ** partition is 256 KiB and holds the BIOS image. The third ** partition is 14.5 MiB and is intended for the flash file system ** image. The last partition is 512 KiB and contains another copy ** of the BIOS image and the reset vector. ** ** Only the third partition should be mounted. The first partition ** should not be mounted, but it can erased and written to using the ** MTD character routines. The second and fourth partitions should ** not be touched - it is possible to corrupt the BIOS image by ** mounting these partitions, and potentially the board will not be ** recoverable afterwards. */ /* partition_info gives details on the logical partitions that the split the * single flash device into. If the size if zero we use up to the end of the * device. */ static struct mtd_partition partition_info[]={ { .name = "NetSc520 boot kernel", .offset = 0, .size = 0xc0000 }, { .name = "NetSc520 Low BIOS", .offset = 0xc0000, .size = 0x40000 }, { .name = "NetSc520 file system", .offset = 0x100000, .size = 0xe80000 }, { .name = "NetSc520 High BIOS", .offset = 0xf80000, .size = 0x80000 }, }; #define NUM_PARTITIONS (sizeof(partition_info)/sizeof(partition_info[0])) #define WINDOW_SIZE 0x00100000 #define WINDOW_ADDR 0x00200000 static struct map_info netsc520_map = { .name = "netsc520 Flash Bank", .size = WINDOW_SIZE, .bankwidth = 4, .phys = WINDOW_ADDR, }; #define NUM_FLASH_BANKS (sizeof(netsc520_map)/sizeof(struct map_info)) static struct mtd_info *mymtd; static int __init init_netsc520(void) { printk(KERN_NOTICE "NetSc520 flash device: 0x%lx at 0x%lx\n", netsc520_map.size, netsc520_map.phys); netsc520_map.virt = ioremap_nocache(netsc520_map.phys, netsc520_map.size); if (!netsc520_map.virt) { printk("Failed to ioremap_nocache\n"); return -EIO; } simple_map_init(&netsc520_map); mymtd = do_map_probe("cfi_probe", &netsc520_map); if(!mymtd) mymtd = do_map_probe("map_ram", &netsc520_map); if(!mymtd) mymtd = do_map_probe("map_rom", &netsc520_map); if (!mymtd) { iounmap(netsc520_map.virt); return -ENXIO; } mymtd->owner = THIS_MODULE; add_mtd_partitions( mymtd, partition_info, NUM_PARTITIONS ); return 0; } static void __exit cleanup_netsc520(void) { if (mymtd) { del_mtd_partitions(mymtd); map_destroy(mymtd); } if (netsc520_map.virt) { iounmap(netsc520_map.virt); netsc520_map.virt = NULL; } } module_init(init_netsc520); module_exit(cleanup_netsc520); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@amd.com>"); MODULE_DESCRIPTION("MTD map driver for AMD NetSc520 Demonstration Board");