Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* netsc520.c -- MTD map driver for AMD NetSc520 Demonstration Board |
| 2 | * |
| 3 | * Copyright (C) 2001 Mark Langsdorf (mark.langsdorf@amd.com) |
| 4 | * based on sc520cdp.c by Sysgo Real-Time Solutions GmbH |
| 5 | * |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 6 | * $Id: netsc520.c,v 1.14 2005/11/07 11:14:27 gleixner Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| 21 | * |
| 22 | * The NetSc520 is a demonstration board for the Elan Sc520 processor available |
| 23 | * from AMD. It has a single back of 16 megs of 32-bit Flash ROM and another |
| 24 | * 16 megs of SDRAM. |
| 25 | */ |
| 26 | |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <asm/io.h> |
| 32 | #include <linux/mtd/mtd.h> |
| 33 | #include <linux/mtd/map.h> |
| 34 | #include <linux/mtd/partitions.h> |
| 35 | |
| 36 | |
| 37 | /* |
| 38 | ** The single, 16 megabyte flash bank is divided into four virtual |
| 39 | ** partitions. The first partition is 768 KiB and is intended to |
| 40 | ** store the kernel image loaded by the bootstrap loader. The second |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 41 | ** partition is 256 KiB and holds the BIOS image. The third |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | ** partition is 14.5 MiB and is intended for the flash file system |
| 43 | ** image. The last partition is 512 KiB and contains another copy |
| 44 | ** of the BIOS image and the reset vector. |
| 45 | ** |
| 46 | ** Only the third partition should be mounted. The first partition |
| 47 | ** should not be mounted, but it can erased and written to using the |
| 48 | ** MTD character routines. The second and fourth partitions should |
| 49 | ** not be touched - it is possible to corrupt the BIOS image by |
| 50 | ** mounting these partitions, and potentially the board will not be |
| 51 | ** recoverable afterwards. |
| 52 | */ |
| 53 | |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 54 | /* partition_info gives details on the logical partitions that the split the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | * single flash device into. If the size if zero we use up to the end of the |
| 56 | * device. */ |
| 57 | static struct mtd_partition partition_info[]={ |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 58 | { |
| 59 | .name = "NetSc520 boot kernel", |
| 60 | .offset = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | .size = 0xc0000 |
| 62 | }, |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 63 | { |
| 64 | .name = "NetSc520 Low BIOS", |
| 65 | .offset = 0xc0000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | .size = 0x40000 |
| 67 | }, |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 68 | { |
| 69 | .name = "NetSc520 file system", |
| 70 | .offset = 0x100000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | .size = 0xe80000 |
| 72 | }, |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 73 | { |
| 74 | .name = "NetSc520 High BIOS", |
| 75 | .offset = 0xf80000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | .size = 0x80000 |
| 77 | }, |
| 78 | }; |
Tobias Klauser | 87d10f3 | 2006-03-31 02:29:45 -0800 | [diff] [blame] | 79 | #define NUM_PARTITIONS ARRAY_SIZE(partition_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | #define WINDOW_SIZE 0x00100000 |
| 82 | #define WINDOW_ADDR 0x00200000 |
| 83 | |
| 84 | static struct map_info netsc520_map = { |
| 85 | .name = "netsc520 Flash Bank", |
| 86 | .size = WINDOW_SIZE, |
| 87 | .bankwidth = 4, |
| 88 | .phys = WINDOW_ADDR, |
| 89 | }; |
| 90 | |
Tobias Klauser | 87d10f3 | 2006-03-31 02:29:45 -0800 | [diff] [blame] | 91 | #define NUM_FLASH_BANKS ARRAY_SIZE(netsc520_map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | static struct mtd_info *mymtd; |
| 94 | |
| 95 | static int __init init_netsc520(void) |
| 96 | { |
Andrew Morton | 3ce32f5 | 2007-02-17 16:02:07 -0800 | [diff] [blame] | 97 | printk(KERN_NOTICE "NetSc520 flash device: 0x%Lx at 0x%Lx\n", |
| 98 | (unsigned long long)netsc520_map.size, |
| 99 | (unsigned long long)netsc520_map.phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | netsc520_map.virt = ioremap_nocache(netsc520_map.phys, netsc520_map.size); |
| 101 | |
| 102 | if (!netsc520_map.virt) { |
| 103 | printk("Failed to ioremap_nocache\n"); |
| 104 | return -EIO; |
| 105 | } |
| 106 | |
| 107 | simple_map_init(&netsc520_map); |
| 108 | |
| 109 | mymtd = do_map_probe("cfi_probe", &netsc520_map); |
| 110 | if(!mymtd) |
| 111 | mymtd = do_map_probe("map_ram", &netsc520_map); |
| 112 | if(!mymtd) |
| 113 | mymtd = do_map_probe("map_rom", &netsc520_map); |
| 114 | |
| 115 | if (!mymtd) { |
| 116 | iounmap(netsc520_map.virt); |
| 117 | return -ENXIO; |
| 118 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | mymtd->owner = THIS_MODULE; |
| 121 | add_mtd_partitions( mymtd, partition_info, NUM_PARTITIONS ); |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static void __exit cleanup_netsc520(void) |
| 126 | { |
| 127 | if (mymtd) { |
| 128 | del_mtd_partitions(mymtd); |
| 129 | map_destroy(mymtd); |
| 130 | } |
| 131 | if (netsc520_map.virt) { |
| 132 | iounmap(netsc520_map.virt); |
| 133 | netsc520_map.virt = NULL; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | module_init(init_netsc520); |
| 138 | module_exit(cleanup_netsc520); |
| 139 | |
| 140 | MODULE_LICENSE("GPL"); |
| 141 | MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@amd.com>"); |
| 142 | MODULE_DESCRIPTION("MTD map driver for AMD NetSc520 Demonstration Board"); |