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1da177e4 | 1 | /* |
69f34c98 TG |
2 | * $Id: ebony.c,v 1.16 2005/11/07 11:14:26 gleixner Exp $ |
3 | * | |
1da177e4 LT |
4 | * Mapping for Ebony user flash |
5 | * | |
6 | * Matt Porter <mporter@kernel.crashing.org> | |
7 | * | |
8 | * Copyright 2002-2004 MontaVista Software Inc. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the | |
12 | * Free Software Foundation; either version 2 of the License, or (at your | |
13 | * option) any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/mtd/mtd.h> | |
21 | #include <linux/mtd/map.h> | |
22 | #include <linux/mtd/partitions.h> | |
1da177e4 LT |
23 | #include <asm/io.h> |
24 | #include <asm/ibm44x.h> | |
25 | #include <platforms/4xx/ebony.h> | |
26 | ||
27 | static struct mtd_info *flash; | |
28 | ||
29 | static struct map_info ebony_small_map = { | |
30 | .name = "Ebony small flash", | |
31 | .size = EBONY_SMALL_FLASH_SIZE, | |
32 | .bankwidth = 1, | |
33 | }; | |
34 | ||
35 | static struct map_info ebony_large_map = { | |
36 | .name = "Ebony large flash", | |
37 | .size = EBONY_LARGE_FLASH_SIZE, | |
38 | .bankwidth = 1, | |
39 | }; | |
40 | ||
41 | static struct mtd_partition ebony_small_partitions[] = { | |
42 | { | |
43 | .name = "OpenBIOS", | |
44 | .offset = 0x0, | |
45 | .size = 0x80000, | |
46 | } | |
47 | }; | |
48 | ||
49 | static struct mtd_partition ebony_large_partitions[] = { | |
50 | { | |
51 | .name = "fs", | |
52 | .offset = 0, | |
53 | .size = 0x380000, | |
54 | }, | |
55 | { | |
56 | .name = "firmware", | |
57 | .offset = 0x380000, | |
58 | .size = 0x80000, | |
59 | } | |
60 | }; | |
61 | ||
62 | int __init init_ebony(void) | |
63 | { | |
64 | u8 fpga0_reg; | |
65 | u8 __iomem *fpga0_adr; | |
66 | unsigned long long small_flash_base, large_flash_base; | |
67 | ||
68 | fpga0_adr = ioremap64(EBONY_FPGA_ADDR, 16); | |
69 | if (!fpga0_adr) | |
70 | return -ENOMEM; | |
71 | ||
72 | fpga0_reg = readb(fpga0_adr); | |
73 | iounmap(fpga0_adr); | |
74 | ||
75 | if (EBONY_BOOT_SMALL_FLASH(fpga0_reg) && | |
76 | !EBONY_FLASH_SEL(fpga0_reg)) | |
77 | small_flash_base = EBONY_SMALL_FLASH_HIGH2; | |
78 | else if (EBONY_BOOT_SMALL_FLASH(fpga0_reg) && | |
79 | EBONY_FLASH_SEL(fpga0_reg)) | |
80 | small_flash_base = EBONY_SMALL_FLASH_HIGH1; | |
81 | else if (!EBONY_BOOT_SMALL_FLASH(fpga0_reg) && | |
82 | !EBONY_FLASH_SEL(fpga0_reg)) | |
83 | small_flash_base = EBONY_SMALL_FLASH_LOW2; | |
84 | else | |
85 | small_flash_base = EBONY_SMALL_FLASH_LOW1; | |
69f34c98 | 86 | |
1da177e4 LT |
87 | if (EBONY_BOOT_SMALL_FLASH(fpga0_reg) && |
88 | !EBONY_ONBRD_FLASH_EN(fpga0_reg)) | |
89 | large_flash_base = EBONY_LARGE_FLASH_LOW; | |
90 | else | |
91 | large_flash_base = EBONY_LARGE_FLASH_HIGH; | |
92 | ||
93 | ebony_small_map.phys = small_flash_base; | |
94 | ebony_small_map.virt = ioremap64(small_flash_base, | |
95 | ebony_small_map.size); | |
96 | ||
97 | if (!ebony_small_map.virt) { | |
98 | printk("Failed to ioremap flash\n"); | |
99 | return -EIO; | |
100 | } | |
101 | ||
102 | simple_map_init(&ebony_small_map); | |
103 | ||
104 | flash = do_map_probe("jedec_probe", &ebony_small_map); | |
105 | if (flash) { | |
106 | flash->owner = THIS_MODULE; | |
107 | add_mtd_partitions(flash, ebony_small_partitions, | |
108 | ARRAY_SIZE(ebony_small_partitions)); | |
109 | } else { | |
110 | printk("map probe failed for flash\n"); | |
25f0c659 | 111 | iounmap(ebony_small_map.virt); |
1da177e4 LT |
112 | return -ENXIO; |
113 | } | |
114 | ||
115 | ebony_large_map.phys = large_flash_base; | |
116 | ebony_large_map.virt = ioremap64(large_flash_base, | |
117 | ebony_large_map.size); | |
118 | ||
119 | if (!ebony_large_map.virt) { | |
120 | printk("Failed to ioremap flash\n"); | |
25f0c659 | 121 | iounmap(ebony_small_map.virt); |
1da177e4 LT |
122 | return -EIO; |
123 | } | |
124 | ||
125 | simple_map_init(&ebony_large_map); | |
126 | ||
127 | flash = do_map_probe("jedec_probe", &ebony_large_map); | |
128 | if (flash) { | |
129 | flash->owner = THIS_MODULE; | |
130 | add_mtd_partitions(flash, ebony_large_partitions, | |
131 | ARRAY_SIZE(ebony_large_partitions)); | |
132 | } else { | |
133 | printk("map probe failed for flash\n"); | |
25f0c659 AL |
134 | iounmap(ebony_small_map.virt); |
135 | iounmap(ebony_large_map.virt); | |
1da177e4 LT |
136 | return -ENXIO; |
137 | } | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static void __exit cleanup_ebony(void) | |
143 | { | |
144 | if (flash) { | |
145 | del_mtd_partitions(flash); | |
146 | map_destroy(flash); | |
147 | } | |
148 | ||
149 | if (ebony_small_map.virt) { | |
150 | iounmap(ebony_small_map.virt); | |
151 | ebony_small_map.virt = NULL; | |
152 | } | |
153 | ||
154 | if (ebony_large_map.virt) { | |
155 | iounmap(ebony_large_map.virt); | |
156 | ebony_large_map.virt = NULL; | |
157 | } | |
158 | } | |
159 | ||
160 | module_init(init_ebony); | |
161 | module_exit(cleanup_ebony); | |
162 | ||
163 | MODULE_LICENSE("GPL"); | |
164 | MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>"); | |
165 | MODULE_DESCRIPTION("MTD map and partitions for IBM 440GP Ebony boards"); |