2 * drivers/mtd/maps/redwood.c
4 * FLASH map for the IBM Redwood 4/5/6 boards.
6 * Author: MontaVista Software, Inc. <source@mvista.com>
8 * 2001-2003 (c) MontaVista, Software, Inc. This file is licensed under
9 * the terms of the GNU General Public License version 2. This program
10 * is licensed "as is" without any warranty of any kind, whether express
14 #include <linux/module.h>
15 #include <linux/types.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
19 #include <linux/mtd/mtd.h>
20 #include <linux/mtd/map.h>
21 #include <linux/mtd/partitions.h>
25 #if !defined (CONFIG_REDWOOD_6)
27 #define WINDOW_ADDR 0xffc00000
28 #define WINDOW_SIZE 0x00400000
31 #define RW_PART0_SZ 0x10000
32 #define RW_PART1_OF RW_PART0_SZ
33 #define RW_PART1_SZ 0x200000 - 0x10000
34 #define RW_PART2_OF 0x200000
35 #define RW_PART2_SZ 0x10000
36 #define RW_PART3_OF 0x210000
37 #define RW_PART3_SZ 0x200000 - (0x10000 + 0x20000)
38 #define RW_PART4_OF 0x3e0000
39 #define RW_PART4_SZ 0x20000
41 static struct mtd_partition redwood_flash_partitions[] = {
43 .name = "Redwood OpenBIOS Vital Product Data",
44 .offset = RW_PART0_OF,
46 .mask_flags = MTD_WRITEABLE /* force read-only */
49 .name = "Redwood kernel",
50 .offset = RW_PART1_OF,
54 .name = "Redwood OpenBIOS non-volatile storage",
55 .offset = RW_PART2_OF,
57 .mask_flags = MTD_WRITEABLE /* force read-only */
60 .name = "Redwood filesystem",
61 .offset = RW_PART3_OF,
65 .name = "Redwood OpenBIOS",
66 .offset = RW_PART4_OF,
68 .mask_flags = MTD_WRITEABLE /* force read-only */
72 #else /* CONFIG_REDWOOD_6 */
73 /* FIXME: the window is bigger - armin */
74 #define WINDOW_ADDR 0xff800000
75 #define WINDOW_SIZE 0x00800000
78 #define RW_PART0_SZ 0x400000 /* 4 MiB data */
79 #define RW_PART1_OF RW_PART0_OF + RW_PART0_SZ
80 #define RW_PART1_SZ 0x10000 /* 64K VPD */
81 #define RW_PART2_OF RW_PART1_OF + RW_PART1_SZ
82 #define RW_PART2_SZ 0x400000 - (0x10000 + 0x20000)
83 #define RW_PART3_OF RW_PART2_OF + RW_PART2_SZ
84 #define RW_PART3_SZ 0x20000
86 static struct mtd_partition redwood_flash_partitions[] = {
88 .name = "Redwood filesystem",
89 .offset = RW_PART0_OF,
93 .name = "Redwood OpenBIOS Vital Product Data",
94 .offset = RW_PART1_OF,
96 .mask_flags = MTD_WRITEABLE /* force read-only */
99 .name = "Redwood kernel",
100 .offset = RW_PART2_OF,
104 .name = "Redwood OpenBIOS",
105 .offset = RW_PART3_OF,
107 .mask_flags = MTD_WRITEABLE /* force read-only */
111 #endif /* CONFIG_REDWOOD_6 */
113 struct map_info redwood_flash_map = {
114 .name = "IBM Redwood",
121 #define NUM_REDWOOD_FLASH_PARTITIONS ARRAY_SIZE(redwood_flash_partitions)
123 static struct mtd_info *redwood_mtd;
125 int __init init_redwood_flash(void)
129 printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n",
130 WINDOW_SIZE, WINDOW_ADDR);
132 redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
134 if (!redwood_flash_map.virt) {
135 printk("init_redwood_flash: failed to ioremap\n");
138 simple_map_init(&redwood_flash_map);
140 redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map);
143 redwood_mtd->owner = THIS_MODULE;
144 err = add_mtd_partitions(redwood_mtd,
145 redwood_flash_partitions,
146 NUM_REDWOOD_FLASH_PARTITIONS);
148 printk("init_redwood_flash: add_mtd_partitions failed\n");
149 iounmap(redwood_flash_map.virt);
155 iounmap(redwood_flash_map.virt);
159 static void __exit cleanup_redwood_flash(void)
162 del_mtd_partitions(redwood_mtd);
163 /* moved iounmap after map_destroy - armin */
164 map_destroy(redwood_mtd);
165 iounmap((void *)redwood_flash_map.virt);
169 module_init(init_redwood_flash);
170 module_exit(cleanup_redwood_flash);
172 MODULE_LICENSE("GPL");
173 MODULE_AUTHOR("MontaVista Software <source@mvista.com>");
174 MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards");