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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Handle mapping of the NOR flash on implementa A7 boards |
3 | * | |
4 | * Copyright 2002 SYSGO Real-Time Solutions GmbH | |
69f34c98 | 5 | * |
1da177e4 LT |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/init.h> | |
15 | #include <asm/io.h> | |
16 | #include <linux/mtd/mtd.h> | |
17 | #include <linux/mtd/map.h> | |
1da177e4 | 18 | #include <linux/mtd/partitions.h> |
1da177e4 LT |
19 | |
20 | #define WINDOW_ADDR0 0x00000000 /* physical properties of flash */ | |
21 | #define WINDOW_SIZE0 0x00800000 | |
22 | #define WINDOW_ADDR1 0x10000000 /* physical properties of flash */ | |
23 | #define WINDOW_SIZE1 0x00800000 | |
24 | #define NUM_FLASHBANKS 2 | |
25 | #define BUSWIDTH 4 | |
26 | ||
1da177e4 LT |
27 | #define MSG_PREFIX "impA7:" /* prefix for our printk()'s */ |
28 | #define MTDID "impa7-%d" /* for mtdparts= partitioning */ | |
29 | ||
30 | static struct mtd_info *impa7_mtd[NUM_FLASHBANKS]; | |
31 | ||
0984c891 | 32 | static const char * const rom_probe_types[] = { "jedec_probe", NULL }; |
1da177e4 LT |
33 | |
34 | static struct map_info impa7_map[NUM_FLASHBANKS] = { | |
35 | { | |
36 | .name = "impA7 NOR Flash Bank #0", | |
37 | .size = WINDOW_SIZE0, | |
38 | .bankwidth = BUSWIDTH, | |
39 | }, | |
40 | { | |
41 | .name = "impA7 NOR Flash Bank #1", | |
42 | .size = WINDOW_SIZE1, | |
43 | .bankwidth = BUSWIDTH, | |
44 | }, | |
45 | }; | |
46 | ||
1da177e4 | 47 | /* |
69f34c98 | 48 | * MTD partitioning stuff |
1da177e4 | 49 | */ |
5003403b | 50 | static struct mtd_partition partitions[] = |
1da177e4 LT |
51 | { |
52 | { | |
53 | .name = "FileSystem", | |
54 | .size = 0x800000, | |
55 | .offset = 0x00000000 | |
56 | }, | |
57 | }; | |
58 | ||
4f8f3af2 | 59 | static int __init init_impa7(void) |
1da177e4 | 60 | { |
0984c891 | 61 | const char * const *type; |
1da177e4 LT |
62 | int i; |
63 | static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = { | |
64 | { WINDOW_ADDR0, WINDOW_SIZE0 }, | |
65 | { WINDOW_ADDR1, WINDOW_SIZE1 }, | |
66 | }; | |
67 | int devicesfound = 0; | |
68 | ||
69 | for(i=0; i<NUM_FLASHBANKS; i++) | |
70 | { | |
71 | printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n", | |
72 | pt[i].size, pt[i].addr); | |
73 | ||
74 | impa7_map[i].phys = pt[i].addr; | |
75 | impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size); | |
76 | if (!impa7_map[i].virt) { | |
77 | printk(MSG_PREFIX "failed to ioremap\n"); | |
78 | return -EIO; | |
79 | } | |
80 | simple_map_init(&impa7_map[i]); | |
81 | ||
d1d90c99 | 82 | impa7_mtd[i] = NULL; |
1da177e4 LT |
83 | type = rom_probe_types; |
84 | for(; !impa7_mtd[i] && *type; type++) { | |
85 | impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]); | |
86 | } | |
87 | ||
88 | if (impa7_mtd[i]) { | |
89 | impa7_mtd[i]->owner = THIS_MODULE; | |
90 | devicesfound++; | |
42d7fbe2 | 91 | mtd_device_parse_register(impa7_mtd[i], NULL, NULL, |
5003403b DES |
92 | partitions, |
93 | ARRAY_SIZE(partitions)); | |
d1d90c99 JH |
94 | } else { |
95 | iounmap((void __iomem *)impa7_map[i].virt); | |
1da177e4 | 96 | } |
1da177e4 LT |
97 | } |
98 | return devicesfound == 0 ? -ENXIO : 0; | |
99 | } | |
100 | ||
101 | static void __exit cleanup_impa7(void) | |
102 | { | |
103 | int i; | |
104 | for (i=0; i<NUM_FLASHBANKS; i++) { | |
105 | if (impa7_mtd[i]) { | |
96b639fd | 106 | mtd_device_unregister(impa7_mtd[i]); |
1da177e4 | 107 | map_destroy(impa7_mtd[i]); |
d1d90c99 JH |
108 | iounmap((void __iomem *)impa7_map[i].virt); |
109 | impa7_map[i].virt = NULL; | |
1da177e4 LT |
110 | } |
111 | } | |
112 | } | |
113 | ||
114 | module_init(init_impa7); | |
115 | module_exit(cleanup_impa7); | |
116 | ||
117 | MODULE_LICENSE("GPL"); | |
118 | MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>"); | |
119 | MODULE_DESCRIPTION("MTD map driver for implementa impA7"); |