1 /*
2 * $Id: ebony.c,v 1.16 2005/11/07 11:14:26 gleixner Exp $
3 *
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>
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;
86
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");
111 iounmap(ebony_small_map.virt);
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");
121 iounmap(ebony_small_map.virt);
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");
134 iounmap(ebony_small_map.virt);
135 iounmap(ebony_large_map.virt);
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");
166
|
This page was automatically generated by the
LXR engine.
|