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Linux kernel mirror (for testing)
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1/*
2 * $Id: beech-mtd.c,v 1.11 2005/11/07 11:14:26 gleixner Exp $
3 *
4 * drivers/mtd/maps/beech-mtd.c MTD mappings and partition tables for
5 * IBM 405LP Beech 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 */
30
31#include <linux/kernel.h>
32#include <linux/module.h>
33#include <linux/types.h>
34#include <linux/init.h>
35
36#include <linux/mtd/mtd.h>
37#include <linux/mtd/map.h>
38#include <linux/mtd/partitions.h>
39
40#include <asm/io.h>
41#include <asm/ibm4xx.h>
42
43#define NAME "Beech Linux Flash"
44#define PADDR BEECH_BIGFLASH_PADDR
45#define SIZE BEECH_BIGFLASH_SIZE
46#define BUSWIDTH 1
47
48/* Flash memories on these boards are memory resources, accessed big-endian. */
49
50
51static struct map_info beech_mtd_map = {
52 .name = NAME,
53 .size = SIZE,
54 .bankwidth = BUSWIDTH,
55 .phys = PADDR
56};
57
58static struct mtd_info *beech_mtd;
59
60static struct mtd_partition beech_partitions[2] = {
61 {
62 .name = "Linux Kernel",
63 .size = BEECH_KERNEL_SIZE,
64 .offset = BEECH_KERNEL_OFFSET
65 }, {
66 .name = "Free Area",
67 .size = BEECH_FREE_AREA_SIZE,
68 .offset = BEECH_FREE_AREA_OFFSET
69 }
70};
71
72static int __init
73init_beech_mtd(void)
74{
75 int err;
76
77 printk("%s: 0x%08x at 0x%08x\n", NAME, SIZE, PADDR);
78
79 beech_mtd_map.virt = ioremap(PADDR, SIZE);
80
81 if (!beech_mtd_map.virt) {
82 printk("%s: failed to ioremap 0x%x\n", NAME, PADDR);
83 return -EIO;
84 }
85
86 simple_map_init(&beech_mtd_map);
87
88 printk("%s: probing %d-bit flash bus\n", NAME, BUSWIDTH * 8);
89 beech_mtd = do_map_probe("cfi_probe", &beech_mtd_map);
90
91 if (!beech_mtd) {
92 iounmap(beech_mtd_map.virt);
93 return -ENXIO;
94 }
95
96 beech_mtd->owner = THIS_MODULE;
97
98 err = add_mtd_partitions(beech_mtd, beech_partitions, 2);
99 if (err) {
100 printk("%s: add_mtd_partitions failed\n", NAME);
101 iounmap(beech_mtd_map.virt);
102 }
103
104 return err;
105}
106
107static void __exit
108cleanup_beech_mtd(void)
109{
110 if (beech_mtd) {
111 del_mtd_partitions(beech_mtd);
112 map_destroy(beech_mtd);
113 iounmap((void *) beech_mtd_map.virt);
114 }
115}
116
117module_init(init_beech_mtd);
118module_exit(cleanup_beech_mtd);
119
120MODULE_LICENSE("GPL");
121MODULE_AUTHOR("Bishop Brock <bcbrock@us.ibm.com>");
122MODULE_DESCRIPTION("MTD map and partitions for IBM 405LP Beech boards");