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1da177e4 | 1 | /* |
69f34c98 | 2 | * $Id: redwood.c,v 1.11 2005/11/07 11:14:28 gleixner Exp $ |
1da177e4 LT |
3 | * |
4 | * drivers/mtd/maps/redwood.c | |
5 | * | |
6 | * FLASH map for the IBM Redwood 4/5/6 boards. | |
7 | * | |
8 | * Author: MontaVista Software, Inc. <source@mvista.com> | |
9 | * | |
10 | * 2001-2003 (c) MontaVista, Software, Inc. This file is licensed under | |
11 | * the terms of the GNU General Public License version 2. This program | |
12 | * is licensed "as is" without any warranty of any kind, whether express | |
13 | * or implied. | |
14 | */ | |
15 | ||
16 | #include <linux/config.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/types.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/init.h> | |
21 | ||
22 | #include <linux/mtd/mtd.h> | |
23 | #include <linux/mtd/map.h> | |
24 | #include <linux/mtd/partitions.h> | |
25 | ||
26 | #include <asm/io.h> | |
27 | ||
28 | #if !defined (CONFIG_REDWOOD_6) | |
29 | ||
30 | #define WINDOW_ADDR 0xffc00000 | |
31 | #define WINDOW_SIZE 0x00400000 | |
32 | ||
33 | #define RW_PART0_OF 0 | |
34 | #define RW_PART0_SZ 0x10000 | |
35 | #define RW_PART1_OF RW_PART0_SZ | |
36 | #define RW_PART1_SZ 0x200000 - 0x10000 | |
37 | #define RW_PART2_OF 0x200000 | |
38 | #define RW_PART2_SZ 0x10000 | |
39 | #define RW_PART3_OF 0x210000 | |
40 | #define RW_PART3_SZ 0x200000 - (0x10000 + 0x20000) | |
41 | #define RW_PART4_OF 0x3e0000 | |
42 | #define RW_PART4_SZ 0x20000 | |
43 | ||
44 | static struct mtd_partition redwood_flash_partitions[] = { | |
45 | { | |
46 | .name = "Redwood OpenBIOS Vital Product Data", | |
47 | .offset = RW_PART0_OF, | |
48 | .size = RW_PART0_SZ, | |
49 | .mask_flags = MTD_WRITEABLE /* force read-only */ | |
50 | }, | |
51 | { | |
52 | .name = "Redwood kernel", | |
53 | .offset = RW_PART1_OF, | |
54 | .size = RW_PART1_SZ | |
55 | }, | |
56 | { | |
57 | .name = "Redwood OpenBIOS non-volatile storage", | |
58 | .offset = RW_PART2_OF, | |
59 | .size = RW_PART2_SZ, | |
60 | .mask_flags = MTD_WRITEABLE /* force read-only */ | |
61 | }, | |
62 | { | |
63 | .name = "Redwood filesystem", | |
64 | .offset = RW_PART3_OF, | |
65 | .size = RW_PART3_SZ | |
66 | }, | |
67 | { | |
68 | .name = "Redwood OpenBIOS", | |
69 | .offset = RW_PART4_OF, | |
70 | .size = RW_PART4_SZ, | |
71 | .mask_flags = MTD_WRITEABLE /* force read-only */ | |
72 | } | |
73 | }; | |
74 | ||
75 | #else /* CONFIG_REDWOOD_6 */ | |
76 | /* FIXME: the window is bigger - armin */ | |
77 | #define WINDOW_ADDR 0xff800000 | |
78 | #define WINDOW_SIZE 0x00800000 | |
79 | ||
80 | #define RW_PART0_OF 0 | |
81 | #define RW_PART0_SZ 0x400000 /* 4 MiB data */ | |
69f34c98 | 82 | #define RW_PART1_OF RW_PART0_OF + RW_PART0_SZ |
1da177e4 LT |
83 | #define RW_PART1_SZ 0x10000 /* 64K VPD */ |
84 | #define RW_PART2_OF RW_PART1_OF + RW_PART1_SZ | |
85 | #define RW_PART2_SZ 0x400000 - (0x10000 + 0x20000) | |
86 | #define RW_PART3_OF RW_PART2_OF + RW_PART2_SZ | |
87 | #define RW_PART3_SZ 0x20000 | |
88 | ||
89 | static struct mtd_partition redwood_flash_partitions[] = { | |
90 | { | |
91 | .name = "Redwood filesystem", | |
92 | .offset = RW_PART0_OF, | |
93 | .size = RW_PART0_SZ | |
94 | }, | |
95 | { | |
96 | .name = "Redwood OpenBIOS Vital Product Data", | |
97 | .offset = RW_PART1_OF, | |
98 | .size = RW_PART1_SZ, | |
99 | .mask_flags = MTD_WRITEABLE /* force read-only */ | |
100 | }, | |
101 | { | |
102 | .name = "Redwood kernel", | |
103 | .offset = RW_PART2_OF, | |
104 | .size = RW_PART2_SZ | |
105 | }, | |
106 | { | |
107 | .name = "Redwood OpenBIOS", | |
108 | .offset = RW_PART3_OF, | |
109 | .size = RW_PART3_SZ, | |
110 | .mask_flags = MTD_WRITEABLE /* force read-only */ | |
111 | } | |
112 | }; | |
113 | ||
114 | #endif /* CONFIG_REDWOOD_6 */ | |
115 | ||
116 | struct map_info redwood_flash_map = { | |
117 | .name = "IBM Redwood", | |
118 | .size = WINDOW_SIZE, | |
119 | .bankwidth = 2, | |
120 | .phys = WINDOW_ADDR, | |
121 | }; | |
122 | ||
123 | ||
124 | #define NUM_REDWOOD_FLASH_PARTITIONS \ | |
125 | (sizeof(redwood_flash_partitions)/sizeof(redwood_flash_partitions[0])) | |
126 | ||
127 | static struct mtd_info *redwood_mtd; | |
128 | ||
129 | int __init init_redwood_flash(void) | |
130 | { | |
131 | printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n", | |
132 | WINDOW_SIZE, WINDOW_ADDR); | |
133 | ||
134 | redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); | |
135 | ||
136 | if (!redwood_flash_map.virt) { | |
137 | printk("init_redwood_flash: failed to ioremap\n"); | |
138 | return -EIO; | |
139 | } | |
140 | simple_map_init(&redwood_flash_map); | |
141 | ||
142 | redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map); | |
143 | ||
144 | if (redwood_mtd) { | |
145 | redwood_mtd->owner = THIS_MODULE; | |
146 | return add_mtd_partitions(redwood_mtd, | |
147 | redwood_flash_partitions, | |
148 | NUM_REDWOOD_FLASH_PARTITIONS); | |
149 | } | |
150 | ||
151 | return -ENXIO; | |
152 | } | |
153 | ||
154 | static void __exit cleanup_redwood_flash(void) | |
155 | { | |
156 | if (redwood_mtd) { | |
157 | del_mtd_partitions(redwood_mtd); | |
158 | /* moved iounmap after map_destroy - armin */ | |
159 | map_destroy(redwood_mtd); | |
160 | iounmap((void *)redwood_flash_map.virt); | |
161 | } | |
162 | } | |
163 | ||
164 | module_init(init_redwood_flash); | |
165 | module_exit(cleanup_redwood_flash); | |
166 | ||
167 | MODULE_LICENSE("GPL"); | |
168 | MODULE_AUTHOR("MontaVista Software <source@mvista.com>"); | |
169 | MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards"); |