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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * $Id: arctic-mtd.c,v 1.14 2005/11/07 11:14:26 gleixner Exp $
3 *
4 * drivers/mtd/maps/arctic-mtd.c MTD mappings and partition tables for
5 * IBM 405LP Arctic boards.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 * Copyright (C) 2002, International Business Machines Corporation
22 * All Rights Reserved.
23 *
24 * Bishop Brock
25 * IBM Research, Austin Center for Low-Power Computing
26 * bcbrock@us.ibm.com
27 * March 2002
28 *
29 * modified for Arctic by,
30 * David Gibson
31 * IBM OzLabs, Canberra, Australia
32 * <arctic@gibson.dropbear.id.au>
33 */
34
35#include <linux/kernel.h>
36#include <linux/module.h>
37#include <linux/types.h>
38#include <linux/init.h>
39
40#include <linux/mtd/mtd.h>
41#include <linux/mtd/map.h>
42#include <linux/mtd/partitions.h>
43
44#include <asm/io.h>
45#include <asm/ibm4xx.h>
46
47/*
48 * 0 : 0xFE00 0000 - 0xFEFF FFFF : Filesystem 1 (16MiB)
49 * 1 : 0xFF00 0000 - 0xFF4F FFFF : kernel (5.12MiB)
50 * 2 : 0xFF50 0000 - 0xFFF5 FFFF : Filesystem 2 (10.624MiB) (if non-XIP)
51 * 3 : 0xFFF6 0000 - 0xFFFF FFFF : PIBS Firmware (640KiB)
52 */
53
54#define FFS1_SIZE 0x01000000 /* 16MiB */
55#define KERNEL_SIZE 0x00500000 /* 5.12MiB */
56#define FFS2_SIZE 0x00a60000 /* 10.624MiB */
57#define FIRMWARE_SIZE 0x000a0000 /* 640KiB */
58
59
60#define NAME "Arctic Linux Flash"
61#define PADDR SUBZERO_BOOTFLASH_PADDR
62#define BUSWIDTH 2
63#define SIZE SUBZERO_BOOTFLASH_SIZE
64#define PARTITIONS 4
65
66/* Flash memories on these boards are memory resources, accessed big-endian. */
67
68{
69 /* do nothing for now */
70}
71
72static struct map_info arctic_mtd_map = {
73 .name = NAME,
74 .size = SIZE,
75 .bankwidth = BUSWIDTH,
76 .phys = PADDR,
77};
78
79static struct mtd_info *arctic_mtd;
80
81static struct mtd_partition arctic_partitions[PARTITIONS] = {
82 { .name = "Filesystem",
83 .size = FFS1_SIZE,
84 .offset = 0,},
85 { .name = "Kernel",
86 .size = KERNEL_SIZE,
87 .offset = FFS1_SIZE,},
88 { .name = "Filesystem",
89 .size = FFS2_SIZE,
90 .offset = FFS1_SIZE + KERNEL_SIZE,},
91 { .name = "Firmware",
92 .size = FIRMWARE_SIZE,
93 .offset = SUBZERO_BOOTFLASH_SIZE - FIRMWARE_SIZE,},
94};
95
96static int __init
97init_arctic_mtd(void)
98{
99 printk("%s: 0x%08x at 0x%08x\n", NAME, SIZE, PADDR);
100
101 arctic_mtd_map.virt = ioremap(PADDR, SIZE);
102
103 if (!arctic_mtd_map.virt) {
104 printk("%s: failed to ioremap 0x%x\n", NAME, PADDR);
105 return -EIO;
106 }
107 simple_map_init(&arctic_mtd_map);
108
109 printk("%s: probing %d-bit flash bus\n", NAME, BUSWIDTH * 8);
110 arctic_mtd = do_map_probe("cfi_probe", &arctic_mtd_map);
111
112 if (!arctic_mtd)
113 return -ENXIO;
114
115 arctic_mtd->owner = THIS_MODULE;
116
117 return add_mtd_partitions(arctic_mtd, arctic_partitions, PARTITIONS);
118}
119
120static void __exit
121cleanup_arctic_mtd(void)
122{
123 if (arctic_mtd) {
124 del_mtd_partitions(arctic_mtd);
125 map_destroy(arctic_mtd);
126 iounmap((void *) arctic_mtd_map.virt);
127 }
128}
129
130module_init(init_arctic_mtd);
131module_exit(cleanup_arctic_mtd);
132
133MODULE_LICENSE("GPL");
134MODULE_AUTHOR("David Gibson <arctic@gibson.dropbear.id.au>");
135MODULE_DESCRIPTION("MTD map and partitions for IBM 405LP Arctic boards");