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Linux kernel mirror (for testing)
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kernel
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linux
1/*
2 * Mapping for Ocotea user flash
3 *
4 * Matt Porter <mporter@kernel.crashing.org>
5 *
6 * Copyright 2002-2004 MontaVista Software Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/module.h>
15#include <linux/types.h>
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/mtd/mtd.h>
19#include <linux/mtd/map.h>
20#include <linux/mtd/partitions.h>
21#include <linux/config.h>
22#include <asm/io.h>
23#include <asm/ibm44x.h>
24#include <platforms/4xx/ocotea.h>
25
26static struct mtd_info *flash;
27
28static struct map_info ocotea_small_map = {
29 .name = "Ocotea small flash",
30 .size = OCOTEA_SMALL_FLASH_SIZE,
31 .buswidth = 1,
32};
33
34static struct map_info ocotea_large_map = {
35 .name = "Ocotea large flash",
36 .size = OCOTEA_LARGE_FLASH_SIZE,
37 .buswidth = 1,
38};
39
40static struct mtd_partition ocotea_small_partitions[] = {
41 {
42 .name = "pibs",
43 .offset = 0x0,
44 .size = 0x100000,
45 }
46};
47
48static struct mtd_partition ocotea_large_partitions[] = {
49 {
50 .name = "fs",
51 .offset = 0,
52 .size = 0x300000,
53 },
54 {
55 .name = "firmware",
56 .offset = 0x300000,
57 .size = 0x100000,
58 }
59};
60
61int __init init_ocotea(void)
62{
63 u8 fpga0_reg;
64 u8 *fpga0_adr;
65 unsigned long long small_flash_base, large_flash_base;
66
67 fpga0_adr = ioremap64(OCOTEA_FPGA_ADDR, 16);
68 if (!fpga0_adr)
69 return -ENOMEM;
70
71 fpga0_reg = readb((unsigned long)fpga0_adr);
72 iounmap(fpga0_adr);
73
74 if (OCOTEA_BOOT_LARGE_FLASH(fpga0_reg)) {
75 small_flash_base = OCOTEA_SMALL_FLASH_HIGH;
76 large_flash_base = OCOTEA_LARGE_FLASH_LOW;
77 }
78 else {
79 small_flash_base = OCOTEA_SMALL_FLASH_LOW;
80 large_flash_base = OCOTEA_LARGE_FLASH_HIGH;
81 }
82
83 ocotea_small_map.phys = small_flash_base;
84 ocotea_small_map.virt = ioremap64(small_flash_base,
85 ocotea_small_map.size);
86
87 if (!ocotea_small_map.virt) {
88 printk("Failed to ioremap flash\n");
89 return -EIO;
90 }
91
92 simple_map_init(&ocotea_small_map);
93
94 flash = do_map_probe("map_rom", &ocotea_small_map);
95 if (flash) {
96 flash->owner = THIS_MODULE;
97 add_mtd_partitions(flash, ocotea_small_partitions,
98 ARRAY_SIZE(ocotea_small_partitions));
99 } else {
100 printk("map probe failed for flash\n");
101 return -ENXIO;
102 }
103
104 ocotea_large_map.phys = large_flash_base;
105 ocotea_large_map.virt = ioremap64(large_flash_base,
106 ocotea_large_map.size);
107
108 if (!ocotea_large_map.virt) {
109 printk("Failed to ioremap flash\n");
110 return -EIO;
111 }
112
113 simple_map_init(&ocotea_large_map);
114
115 flash = do_map_probe("cfi_probe", &ocotea_large_map);
116 if (flash) {
117 flash->owner = THIS_MODULE;
118 add_mtd_partitions(flash, ocotea_large_partitions,
119 ARRAY_SIZE(ocotea_large_partitions));
120 } else {
121 printk("map probe failed for flash\n");
122 return -ENXIO;
123 }
124
125 return 0;
126}
127
128static void __exit cleanup_ocotea(void)
129{
130 if (flash) {
131 del_mtd_partitions(flash);
132 map_destroy(flash);
133 }
134
135 if (ocotea_small_map.virt) {
136 iounmap((void *)ocotea_small_map.virt);
137 ocotea_small_map.virt = 0;
138 }
139
140 if (ocotea_large_map.virt) {
141 iounmap((void *)ocotea_large_map.virt);
142 ocotea_large_map.virt = 0;
143 }
144}
145
146module_init(init_ocotea);
147module_exit(cleanup_ocotea);
148
149MODULE_LICENSE("GPL");
150MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>");
151MODULE_DESCRIPTION("MTD map and partitions for IBM 440GX Ocotea boards");