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002fa301 PP |
1 | /* |
2 | * Flash memory access on AMD Alchemy evaluation boards | |
69f34c98 | 3 | * |
002fa301 | 4 | * (C) 2003, 2004 Pete Popov <ppopov@embeddedalley.com> |
002fa301 PP |
5 | */ |
6 | ||
002fa301 PP |
7 | #include <linux/init.h> |
8 | #include <linux/module.h> | |
9 | #include <linux/types.h> | |
10 | #include <linux/kernel.h> | |
11 | ||
12 | #include <linux/mtd/mtd.h> | |
13 | #include <linux/mtd/map.h> | |
14 | #include <linux/mtd/partitions.h> | |
15 | ||
16 | #include <asm/io.h> | |
17 | ||
002fa301 PP |
18 | #ifdef CONFIG_MIPS_PB1000 |
19 | #define BOARD_MAP_NAME "Pb1000 Flash" | |
20 | #define BOARD_FLASH_SIZE 0x00800000 /* 8MB */ | |
21 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
22 | #endif | |
23 | ||
24 | #ifdef CONFIG_MIPS_PB1500 | |
25 | #define BOARD_MAP_NAME "Pb1500 Flash" | |
26 | #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */ | |
27 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
28 | #endif | |
29 | ||
30 | #ifdef CONFIG_MIPS_PB1100 | |
31 | #define BOARD_MAP_NAME "Pb1100 Flash" | |
32 | #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */ | |
33 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
34 | #endif | |
35 | ||
36 | #ifdef CONFIG_MIPS_PB1550 | |
37 | #define BOARD_MAP_NAME "Pb1550 Flash" | |
38 | #define BOARD_FLASH_SIZE 0x08000000 /* 128MB */ | |
39 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
40 | #endif | |
41 | ||
42 | #ifdef CONFIG_MIPS_PB1200 | |
43 | #define BOARD_MAP_NAME "Pb1200 Flash" | |
44 | #define BOARD_FLASH_SIZE 0x08000000 /* 128MB */ | |
45 | #define BOARD_FLASH_WIDTH 2 /* 16-bits */ | |
46 | #endif | |
47 | ||
48 | #ifdef CONFIG_MIPS_DB1000 | |
49 | #define BOARD_MAP_NAME "Db1000 Flash" | |
50 | #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */ | |
51 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
52 | #endif | |
53 | ||
54 | #ifdef CONFIG_MIPS_DB1500 | |
55 | #define BOARD_MAP_NAME "Db1500 Flash" | |
56 | #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */ | |
57 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
58 | #endif | |
59 | ||
60 | #ifdef CONFIG_MIPS_DB1100 | |
61 | #define BOARD_MAP_NAME "Db1100 Flash" | |
62 | #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */ | |
63 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
64 | #endif | |
65 | ||
66 | #ifdef CONFIG_MIPS_DB1550 | |
67 | #define BOARD_MAP_NAME "Db1550 Flash" | |
68 | #define BOARD_FLASH_SIZE 0x08000000 /* 128MB */ | |
69 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
70 | #endif | |
71 | ||
72 | #ifdef CONFIG_MIPS_DB1200 | |
73 | #define BOARD_MAP_NAME "Db1200 Flash" | |
74 | #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */ | |
75 | #define BOARD_FLASH_WIDTH 2 /* 16-bits */ | |
76 | #endif | |
77 | ||
78 | #ifdef CONFIG_MIPS_HYDROGEN3 | |
79 | #define BOARD_MAP_NAME "Hydrogen3 Flash" | |
80 | #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */ | |
81 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
82 | #define USE_LOCAL_ACCESSORS /* why? */ | |
83 | #endif | |
84 | ||
85 | #ifdef CONFIG_MIPS_BOSPORUS | |
86 | #define BOARD_MAP_NAME "Bosporus Flash" | |
87 | #define BOARD_FLASH_SIZE 0x01000000 /* 16MB */ | |
88 | #define BOARD_FLASH_WIDTH 2 /* 16-bits */ | |
89 | #endif | |
90 | ||
91 | #ifdef CONFIG_MIPS_MIRAGE | |
92 | #define BOARD_MAP_NAME "Mirage Flash" | |
93 | #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */ | |
94 | #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | |
95 | #define USE_LOCAL_ACCESSORS /* why? */ | |
96 | #endif | |
97 | ||
98 | static struct map_info alchemy_map = { | |
99 | .name = BOARD_MAP_NAME, | |
100 | }; | |
101 | ||
102 | static struct mtd_partition alchemy_partitions[] = { | |
103 | { | |
104 | .name = "User FS", | |
105 | .size = BOARD_FLASH_SIZE - 0x00400000, | |
106 | .offset = 0x0000000 | |
107 | },{ | |
108 | .name = "YAMON", | |
109 | .size = 0x0100000, | |
110 | .offset = MTDPART_OFS_APPEND, | |
111 | .mask_flags = MTD_WRITEABLE | |
112 | },{ | |
113 | .name = "raw kernel", | |
114 | .size = (0x300000 - 0x40000), /* last 256KB is yamon env */ | |
115 | .offset = MTDPART_OFS_APPEND, | |
116 | } | |
117 | }; | |
118 | ||
002fa301 PP |
119 | static struct mtd_info *mymtd; |
120 | ||
121 | int __init alchemy_mtd_init(void) | |
122 | { | |
123 | struct mtd_partition *parts; | |
124 | int nb_parts = 0; | |
125 | unsigned long window_addr; | |
126 | unsigned long window_size; | |
69f34c98 | 127 | |
002fa301 PP |
128 | /* Default flash buswidth */ |
129 | alchemy_map.bankwidth = BOARD_FLASH_WIDTH; | |
130 | ||
131 | window_addr = 0x20000000 - BOARD_FLASH_SIZE; | |
132 | window_size = BOARD_FLASH_SIZE; | |
133 | #ifdef CONFIG_MIPS_MIRAGE_WHY | |
134 | /* Boot ROM flash bank only; no user bank */ | |
135 | window_addr = 0x1C000000; | |
136 | window_size = 0x04000000; | |
137 | /* USERFS from 0x1C00 0000 to 0x1FC00000 */ | |
138 | alchemy_partitions[0].size = 0x03C00000; | |
139 | #endif | |
140 | ||
141 | /* | |
142 | * Static partition definition selection | |
143 | */ | |
144 | parts = alchemy_partitions; | |
87d10f3c | 145 | nb_parts = ARRAY_SIZE(alchemy_partitions); |
002fa301 PP |
146 | alchemy_map.size = window_size; |
147 | ||
148 | /* | |
149 | * Now let's probe for the actual flash. Do it here since | |
150 | * specific machine settings might have been set above. | |
151 | */ | |
69f34c98 | 152 | printk(KERN_NOTICE BOARD_MAP_NAME ": probing %d-bit flash bus\n", |
002fa301 PP |
153 | alchemy_map.bankwidth*8); |
154 | alchemy_map.virt = ioremap(window_addr, window_size); | |
155 | mymtd = do_map_probe("cfi_probe", &alchemy_map); | |
156 | if (!mymtd) { | |
157 | iounmap(alchemy_map.virt); | |
158 | return -ENXIO; | |
159 | } | |
160 | mymtd->owner = THIS_MODULE; | |
161 | ||
162 | add_mtd_partitions(mymtd, parts, nb_parts); | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static void __exit alchemy_mtd_cleanup(void) | |
167 | { | |
168 | if (mymtd) { | |
169 | del_mtd_partitions(mymtd); | |
170 | map_destroy(mymtd); | |
171 | iounmap(alchemy_map.virt); | |
172 | } | |
173 | } | |
174 | ||
175 | module_init(alchemy_mtd_init); | |
176 | module_exit(alchemy_mtd_cleanup); | |
177 | ||
178 | MODULE_AUTHOR("Embedded Alley Solutions, Inc"); | |
179 | MODULE_DESCRIPTION(BOARD_MAP_NAME " MTD driver"); | |
180 | MODULE_LICENSE("GPL"); |