Commit | Line | Data |
---|---|---|
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 LT |
18 | |
19 | #ifdef CONFIG_MTD_PARTITIONS | |
20 | #include <linux/mtd/partitions.h> | |
21 | #endif | |
22 | ||
23 | #define WINDOW_ADDR0 0x00000000 /* physical properties of flash */ | |
24 | #define WINDOW_SIZE0 0x00800000 | |
25 | #define WINDOW_ADDR1 0x10000000 /* physical properties of flash */ | |
26 | #define WINDOW_SIZE1 0x00800000 | |
27 | #define NUM_FLASHBANKS 2 | |
28 | #define BUSWIDTH 4 | |
29 | ||
30 | /* can be { "cfi_probe", "jedec_probe", "map_rom", NULL } */ | |
31 | #define PROBETYPES { "jedec_probe", NULL } | |
32 | ||
33 | #define MSG_PREFIX "impA7:" /* prefix for our printk()'s */ | |
34 | #define MTDID "impa7-%d" /* for mtdparts= partitioning */ | |
35 | ||
36 | static struct mtd_info *impa7_mtd[NUM_FLASHBANKS]; | |
37 | ||
38 | ||
39 | static struct map_info impa7_map[NUM_FLASHBANKS] = { | |
40 | { | |
41 | .name = "impA7 NOR Flash Bank #0", | |
42 | .size = WINDOW_SIZE0, | |
43 | .bankwidth = BUSWIDTH, | |
44 | }, | |
45 | { | |
46 | .name = "impA7 NOR Flash Bank #1", | |
47 | .size = WINDOW_SIZE1, | |
48 | .bankwidth = BUSWIDTH, | |
49 | }, | |
50 | }; | |
51 | ||
52 | #ifdef CONFIG_MTD_PARTITIONS | |
53 | ||
54 | /* | |
69f34c98 | 55 | * MTD partitioning stuff |
1da177e4 LT |
56 | */ |
57 | static struct mtd_partition static_partitions[] = | |
58 | { | |
59 | { | |
60 | .name = "FileSystem", | |
61 | .size = 0x800000, | |
62 | .offset = 0x00000000 | |
63 | }, | |
64 | }; | |
65 | ||
66 | static int mtd_parts_nb[NUM_FLASHBANKS]; | |
67 | static struct mtd_partition *mtd_parts[NUM_FLASHBANKS]; | |
68 | ||
69 | #endif | |
70 | ||
71 | static const char *probes[] = { "cmdlinepart", NULL }; | |
72 | ||
4f8f3af2 | 73 | static int __init init_impa7(void) |
1da177e4 LT |
74 | { |
75 | static const char *rom_probe_types[] = PROBETYPES; | |
76 | const char **type; | |
77 | const char *part_type = 0; | |
78 | int i; | |
79 | static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = { | |
80 | { WINDOW_ADDR0, WINDOW_SIZE0 }, | |
81 | { WINDOW_ADDR1, WINDOW_SIZE1 }, | |
82 | }; | |
83 | int devicesfound = 0; | |
84 | ||
85 | for(i=0; i<NUM_FLASHBANKS; i++) | |
86 | { | |
87 | printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n", | |
88 | pt[i].size, pt[i].addr); | |
89 | ||
90 | impa7_map[i].phys = pt[i].addr; | |
91 | impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size); | |
92 | if (!impa7_map[i].virt) { | |
93 | printk(MSG_PREFIX "failed to ioremap\n"); | |
94 | return -EIO; | |
95 | } | |
96 | simple_map_init(&impa7_map[i]); | |
97 | ||
98 | impa7_mtd[i] = 0; | |
99 | type = rom_probe_types; | |
100 | for(; !impa7_mtd[i] && *type; type++) { | |
101 | impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]); | |
102 | } | |
103 | ||
104 | if (impa7_mtd[i]) { | |
105 | impa7_mtd[i]->owner = THIS_MODULE; | |
106 | devicesfound++; | |
107 | #ifdef CONFIG_MTD_PARTITIONS | |
69f34c98 | 108 | mtd_parts_nb[i] = parse_mtd_partitions(impa7_mtd[i], |
1da177e4 | 109 | probes, |
69f34c98 | 110 | &mtd_parts[i], |
1da177e4 LT |
111 | 0); |
112 | if (mtd_parts_nb[i] > 0) { | |
113 | part_type = "command line"; | |
114 | } else { | |
115 | mtd_parts[i] = static_partitions; | |
116 | mtd_parts_nb[i] = ARRAY_SIZE(static_partitions); | |
117 | part_type = "static"; | |
118 | } | |
119 | ||
120 | printk(KERN_NOTICE MSG_PREFIX | |
69f34c98 | 121 | "using %s partition definition\n", |
1da177e4 | 122 | part_type); |
69f34c98 | 123 | add_mtd_partitions(impa7_mtd[i], |
1da177e4 LT |
124 | mtd_parts[i], mtd_parts_nb[i]); |
125 | #else | |
126 | add_mtd_device(impa7_mtd[i]); | |
127 | ||
128 | #endif | |
129 | } | |
69f34c98 | 130 | else |
1da177e4 LT |
131 | iounmap((void *)impa7_map[i].virt); |
132 | } | |
133 | return devicesfound == 0 ? -ENXIO : 0; | |
134 | } | |
135 | ||
136 | static void __exit cleanup_impa7(void) | |
137 | { | |
138 | int i; | |
139 | for (i=0; i<NUM_FLASHBANKS; i++) { | |
140 | if (impa7_mtd[i]) { | |
141 | #ifdef CONFIG_MTD_PARTITIONS | |
142 | del_mtd_partitions(impa7_mtd[i]); | |
143 | #else | |
144 | del_mtd_device(impa7_mtd[i]); | |
145 | #endif | |
146 | map_destroy(impa7_mtd[i]); | |
147 | iounmap((void *)impa7_map[i].virt); | |
148 | impa7_map[i].virt = 0; | |
149 | } | |
150 | } | |
151 | } | |
152 | ||
153 | module_init(init_impa7); | |
154 | module_exit(cleanup_impa7); | |
155 | ||
156 | MODULE_LICENSE("GPL"); | |
157 | MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>"); | |
158 | MODULE_DESCRIPTION("MTD map driver for implementa impA7"); |