1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* Flash and EPROM on Hitachi Solution Engine and similar boards.
*
* (C) 2001 Red Hat, Inc.
*
* GPL'd
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/errno.h>
static struct mtd_info *flash_mtd;
static struct mtd_info *eprom_mtd;
struct map_info soleng_eprom_map = {
.name = "Solution Engine EPROM",
.size = 0x400000,
.bankwidth = 4,
};
struct map_info soleng_flash_map = {
.name = "Solution Engine FLASH",
.size = 0x400000,
.bankwidth = 4,
};
static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
#ifdef CONFIG_MTD_SUPERH_RESERVE
static struct mtd_partition superh_se_partitions[] = {
/* Reserved for boot code, read-only */
{
.name = "flash_boot",
.offset = 0x00000000,
.size = CONFIG_MTD_SUPERH_RESERVE,
.mask_flags = MTD_WRITEABLE,
},
/* All else is writable (e.g. JFFS) */
{
.name = "Flash FS",
.offset = MTDPART_OFS_NXTBLK,
.size = MTDPART_SIZ_FULL,
}
};
#define NUM_PARTITIONS ARRAY_SIZE(superh_se_partitions)
#else
#define superh_se_partitions NULL
#define NUM_PARTITIONS 0
#endif /* CONFIG_MTD_SUPERH_RESERVE */
static int __init init_soleng_maps(void)
{
/* First probe at offset 0 */
soleng_flash_map.phys = 0;
soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0);
soleng_eprom_map.phys = 0x01000000;
soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000);
simple_map_init(&soleng_eprom_map);
simple_map_init(&soleng_flash_map);
printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n");
flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
if (!flash_mtd) {
/* Not there. Try swapping */
printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n");
soleng_flash_map.phys = 0x01000000;
soleng_flash_map.virt = P2SEGADDR(0x01000000);
soleng_eprom_map.phys = 0;
soleng_eprom_map.virt = P1SEGADDR(0);
flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
if (!flash_mtd) {
/* Eep. */
printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");
return -ENXIO;
}
}
printk(KERN_NOTICE "Solution Engine: Flash at 0x%08lx, EPROM at 0x%08lx\n",
soleng_flash_map.phys & 0x1fffffff,
soleng_eprom_map.phys & 0x1fffffff);
flash_mtd->owner = THIS_MODULE;
eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map);
if (eprom_mtd) {
eprom_mtd->owner = THIS_MODULE;
mtd_device_register(eprom_mtd, NULL, 0);
}
mtd_device_parse_register(flash_mtd, probes, NULL,
superh_se_partitions, NUM_PARTITIONS);
return 0;
}
static void __exit cleanup_soleng_maps(void)
{
if (eprom_mtd) {
mtd_device_unregister(eprom_mtd);
map_destroy(eprom_mtd);
}
mtd_device_unregister(flash_mtd);
map_destroy(flash_mtd);
}
module_init(init_soleng_maps);
module_exit(cleanup_soleng_maps);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards");
|
