2 * Flash memory access on AMD Alchemy evaluation boards
4 * (C) 2003, 2004 Pete Popov <ppopov@embeddedalley.com>
7 #include <linux/init.h>
8 #include <linux/module.h>
9 #include <linux/types.h>
10 #include <linux/kernel.h>
12 #include <linux/mtd/mtd.h>
13 #include <linux/mtd/map.h>
14 #include <linux/mtd/partitions.h>
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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 */
78 #ifdef CONFIG_MIPS_BOSPORUS
79 #define BOARD_MAP_NAME "Bosporus Flash"
80 #define BOARD_FLASH_SIZE 0x01000000 /* 16MB */
81 #define BOARD_FLASH_WIDTH 2 /* 16-bits */
84 #ifdef CONFIG_MIPS_MIRAGE
85 #define BOARD_MAP_NAME "Mirage Flash"
86 #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
87 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
88 #define USE_LOCAL_ACCESSORS /* why? */
91 static struct map_info alchemy_map = {
92 .name = BOARD_MAP_NAME,
95 static struct mtd_partition alchemy_partitions[] = {
98 .size = BOARD_FLASH_SIZE - 0x00400000,
103 .offset = MTDPART_OFS_APPEND,
104 .mask_flags = MTD_WRITEABLE
106 .name = "raw kernel",
107 .size = (0x300000 - 0x40000), /* last 256KB is yamon env */
108 .offset = MTDPART_OFS_APPEND,
112 static struct mtd_info *mymtd;
114 static int __init alchemy_mtd_init(void)
116 struct mtd_partition *parts;
118 unsigned long window_addr;
119 unsigned long window_size;
121 /* Default flash buswidth */
122 alchemy_map.bankwidth = BOARD_FLASH_WIDTH;
124 window_addr = 0x20000000 - BOARD_FLASH_SIZE;
125 window_size = BOARD_FLASH_SIZE;
128 * Static partition definition selection
130 parts = alchemy_partitions;
131 nb_parts = ARRAY_SIZE(alchemy_partitions);
132 alchemy_map.size = window_size;
135 * Now let's probe for the actual flash. Do it here since
136 * specific machine settings might have been set above.
138 printk(KERN_NOTICE BOARD_MAP_NAME ": probing %d-bit flash bus\n",
139 alchemy_map.bankwidth*8);
140 alchemy_map.virt = ioremap(window_addr, window_size);
141 mymtd = do_map_probe("cfi_probe", &alchemy_map);
143 iounmap(alchemy_map.virt);
146 mymtd->owner = THIS_MODULE;
148 add_mtd_partitions(mymtd, parts, nb_parts);
152 static void __exit alchemy_mtd_cleanup(void)
155 del_mtd_partitions(mymtd);
157 iounmap(alchemy_map.virt);
161 module_init(alchemy_mtd_init);
162 module_exit(alchemy_mtd_cleanup);
164 MODULE_AUTHOR("Embedded Alley Solutions, Inc");
165 MODULE_DESCRIPTION(BOARD_MAP_NAME " MTD driver");
166 MODULE_LICENSE("GPL");