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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 <linux/version.h>
23#include <asm/io.h>
24#include <asm/ibm44x.h>
25#include <platforms/4xx/ocotea.h>
26
27static struct mtd_info *flash;
28
29static struct map_info ocotea_small_map = {
30 .name = "Ocotea small flash",
31 .size = OCOTEA_SMALL_FLASH_SIZE,
32 .buswidth = 1,
33};
34
35static struct map_info ocotea_large_map = {
36 .name = "Ocotea large flash",
37 .size = OCOTEA_LARGE_FLASH_SIZE,
38 .buswidth = 1,
39};
40
41static struct mtd_partition ocotea_small_partitions[] = {
42 {
43 .name = "pibs",
44 .offset = 0x0,
45 .size = 0x100000,
46 }
47};
48
49static struct mtd_partition ocotea_large_partitions[] = {
50 {
51 .name = "fs",
52 .offset = 0,
53 .size = 0x300000,
54 },
55 {
56 .name = "firmware",
57 .offset = 0x300000,
58 .size = 0x100000,
59 }
60};
61
62#define NB_OF(x) (sizeof(x)/sizeof(x[0]))
63
64int __init init_ocotea(void)
65{
66 u8 fpga0_reg;
67 u8 *fpga0_adr;
68 unsigned long long small_flash_base, large_flash_base;
69
70 fpga0_adr = ioremap64(OCOTEA_FPGA_ADDR, 16);
71 if (!fpga0_adr)
72 return -ENOMEM;
73
74 fpga0_reg = readb((unsigned long)fpga0_adr);
75 iounmap(fpga0_adr);
76
77 if (OCOTEA_BOOT_LARGE_FLASH(fpga0_reg)) {
78 small_flash_base = OCOTEA_SMALL_FLASH_HIGH;
79 large_flash_base = OCOTEA_LARGE_FLASH_LOW;
80 }
81 else {
82 small_flash_base = OCOTEA_SMALL_FLASH_LOW;
83 large_flash_base = OCOTEA_LARGE_FLASH_HIGH;
84 }
85
86 ocotea_small_map.phys = small_flash_base;
87 ocotea_small_map.virt = ioremap64(small_flash_base,
88 ocotea_small_map.size);
89
90 if (!ocotea_small_map.virt) {
91 printk("Failed to ioremap flash\n");
92 return -EIO;
93 }
94
95 simple_map_init(&ocotea_small_map);
96
97 flash = do_map_probe("map_rom", &ocotea_small_map);
98 if (flash) {
99 flash->owner = THIS_MODULE;
100 add_mtd_partitions(flash, ocotea_small_partitions,
101 NB_OF(ocotea_small_partitions));
102 } else {
103 printk("map probe failed for flash\n");
104 return -ENXIO;
105 }
106
107 ocotea_large_map.phys = large_flash_base;
108 ocotea_large_map.virt = ioremap64(large_flash_base,
109 ocotea_large_map.size);
110
111 if (!ocotea_large_map.virt) {
112 printk("Failed to ioremap flash\n");
113 return -EIO;
114 }
115
116 simple_map_init(&ocotea_large_map);
117
118 flash = do_map_probe("cfi_probe", &ocotea_large_map);
119 if (flash) {
120 flash->owner = THIS_MODULE;
121 add_mtd_partitions(flash, ocotea_large_partitions,
122 NB_OF(ocotea_large_partitions));
123 } else {
124 printk("map probe failed for flash\n");
125 return -ENXIO;
126 }
127
128 return 0;
129}
130
131static void __exit cleanup_ocotea(void)
132{
133 if (flash) {
134 del_mtd_partitions(flash);
135 map_destroy(flash);
136 }
137
138 if (ocotea_small_map.virt) {
139 iounmap((void *)ocotea_small_map.virt);
140 ocotea_small_map.virt = 0;
141 }
142
143 if (ocotea_large_map.virt) {
144 iounmap((void *)ocotea_large_map.virt);
145 ocotea_large_map.virt = 0;
146 }
147}
148
149module_init(init_ocotea);
150module_exit(cleanup_ocotea);
151
152MODULE_LICENSE("GPL");
153MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>");
154MODULE_DESCRIPTION("MTD map and partitions for IBM 440GX Ocotea boards");