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1da177e4 | 1 | /* |
69f34c98 TG |
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 | |
1da177e4 LT |
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 | ||
72 | static struct map_info arctic_mtd_map = { | |
73 | .name = NAME, | |
74 | .size = SIZE, | |
75 | .bankwidth = BUSWIDTH, | |
76 | .phys = PADDR, | |
77 | }; | |
78 | ||
79 | static struct mtd_info *arctic_mtd; | |
80 | ||
81 | static 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 | ||
96 | static int __init | |
97 | init_arctic_mtd(void) | |
98 | { | |
76a5027c | 99 | int err; |
25f0c659 | 100 | |
1da177e4 LT |
101 | printk("%s: 0x%08x at 0x%08x\n", NAME, SIZE, PADDR); |
102 | ||
103 | arctic_mtd_map.virt = ioremap(PADDR, SIZE); | |
104 | ||
105 | if (!arctic_mtd_map.virt) { | |
106 | printk("%s: failed to ioremap 0x%x\n", NAME, PADDR); | |
107 | return -EIO; | |
108 | } | |
109 | simple_map_init(&arctic_mtd_map); | |
110 | ||
111 | printk("%s: probing %d-bit flash bus\n", NAME, BUSWIDTH * 8); | |
112 | arctic_mtd = do_map_probe("cfi_probe", &arctic_mtd_map); | |
113 | ||
25f0c659 | 114 | if (!arctic_mtd) { |
76a5027c | 115 | iounmap(arctic_mtd_map.virt); |
1da177e4 | 116 | return -ENXIO; |
25f0c659 | 117 | } |
1da177e4 LT |
118 | |
119 | arctic_mtd->owner = THIS_MODULE; | |
120 | ||
25f0c659 AL |
121 | err = add_mtd_partitions(arctic_mtd, arctic_partitions, PARTITIONS); |
122 | if (err) { | |
123 | printk("%s: add_mtd_partitions failed\n", NAME); | |
76a5027c | 124 | iounmap(arctic_mtd_map.virt); |
25f0c659 AL |
125 | } |
126 | ||
127 | return err; | |
1da177e4 LT |
128 | } |
129 | ||
130 | static void __exit | |
131 | cleanup_arctic_mtd(void) | |
132 | { | |
133 | if (arctic_mtd) { | |
134 | del_mtd_partitions(arctic_mtd); | |
135 | map_destroy(arctic_mtd); | |
136 | iounmap((void *) arctic_mtd_map.virt); | |
137 | } | |
138 | } | |
139 | ||
140 | module_init(init_arctic_mtd); | |
141 | module_exit(cleanup_arctic_mtd); | |
142 | ||
143 | MODULE_LICENSE("GPL"); | |
144 | MODULE_AUTHOR("David Gibson <arctic@gibson.dropbear.id.au>"); | |
145 | MODULE_DESCRIPTION("MTD map and partitions for IBM 405LP Arctic boards"); |