aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mtd/maps/arctic-mtd.c
blob: d95ae582fbe9a4cc275919153fac944e56e4b664 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/*
 * $Id: arctic-mtd.c,v 1.14 2005/11/07 11:14:26 gleixner 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 __init
init_arctic_mtd(void)
{
	printk("%s: 0x%08x at 0x%08x\n", NAME, SIZE, PADDR);

	arctic_mtd_map.virt = 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 __exit
cleanup_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");