Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Flash and EPROM on Hitachi Solution Engine and similar boards. |
3 | * | |
4 | * (C) 2001 Red Hat, Inc. | |
5 | * | |
6 | * GPL'd | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/types.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/init.h> | |
13 | #include <asm/io.h> | |
14 | #include <linux/mtd/mtd.h> | |
15 | #include <linux/mtd/map.h> | |
16 | #include <linux/mtd/partitions.h> | |
1da177e4 LT |
17 | #include <linux/errno.h> |
18 | ||
19 | static struct mtd_info *flash_mtd; | |
20 | static struct mtd_info *eprom_mtd; | |
21 | ||
1da177e4 LT |
22 | struct map_info soleng_eprom_map = { |
23 | .name = "Solution Engine EPROM", | |
24 | .size = 0x400000, | |
25 | .bankwidth = 4, | |
26 | }; | |
27 | ||
28 | struct map_info soleng_flash_map = { | |
29 | .name = "Solution Engine FLASH", | |
30 | .size = 0x400000, | |
31 | .bankwidth = 4, | |
32 | }; | |
33 | ||
34 | static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; | |
35 | ||
36 | #ifdef CONFIG_MTD_SUPERH_RESERVE | |
37 | static struct mtd_partition superh_se_partitions[] = { | |
38 | /* Reserved for boot code, read-only */ | |
39 | { | |
40 | .name = "flash_boot", | |
41 | .offset = 0x00000000, | |
42 | .size = CONFIG_MTD_SUPERH_RESERVE, | |
43 | .mask_flags = MTD_WRITEABLE, | |
44 | }, | |
45 | /* All else is writable (e.g. JFFS) */ | |
46 | { | |
47 | .name = "Flash FS", | |
48 | .offset = MTDPART_OFS_NXTBLK, | |
49 | .size = MTDPART_SIZ_FULL, | |
50 | } | |
51 | }; | |
7029eef8 DES |
52 | #define NUM_PARTITIONS ARRAY_SIZE(superh_se_partitions) |
53 | #else | |
54 | #define superh_se_partitions NULL | |
55 | #define NUM_PARTITIONS 0 | |
1da177e4 LT |
56 | #endif /* CONFIG_MTD_SUPERH_RESERVE */ |
57 | ||
58 | static int __init init_soleng_maps(void) | |
59 | { | |
1da177e4 LT |
60 | /* First probe at offset 0 */ |
61 | soleng_flash_map.phys = 0; | |
62 | soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0); | |
63 | soleng_eprom_map.phys = 0x01000000; | |
64 | soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000); | |
65 | simple_map_init(&soleng_eprom_map); | |
66 | simple_map_init(&soleng_flash_map); | |
69f34c98 | 67 | |
1da177e4 LT |
68 | printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n"); |
69 | flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map); | |
70 | if (!flash_mtd) { | |
71 | /* Not there. Try swapping */ | |
72 | printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n"); | |
73 | soleng_flash_map.phys = 0x01000000; | |
74 | soleng_flash_map.virt = P2SEGADDR(0x01000000); | |
75 | soleng_eprom_map.phys = 0; | |
76 | soleng_eprom_map.virt = P1SEGADDR(0); | |
77 | flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map); | |
78 | if (!flash_mtd) { | |
79 | /* Eep. */ | |
80 | printk(KERN_NOTICE "Flash chips not detected at either possible location.\n"); | |
81 | return -ENXIO; | |
82 | } | |
83 | } | |
84 | printk(KERN_NOTICE "Solution Engine: Flash at 0x%08lx, EPROM at 0x%08lx\n", | |
85 | soleng_flash_map.phys & 0x1fffffff, | |
86 | soleng_eprom_map.phys & 0x1fffffff); | |
87 | flash_mtd->owner = THIS_MODULE; | |
88 | ||
89 | eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map); | |
90 | if (eprom_mtd) { | |
91 | eprom_mtd->owner = THIS_MODULE; | |
ee0e87b1 | 92 | mtd_device_register(eprom_mtd, NULL, 0); |
1da177e4 LT |
93 | } |
94 | ||
42d7fbe2 AB |
95 | mtd_device_parse_register(flash_mtd, probes, NULL, |
96 | superh_se_partitions, NUM_PARTITIONS); | |
1da177e4 LT |
97 | |
98 | return 0; | |
99 | } | |
100 | ||
101 | static void __exit cleanup_soleng_maps(void) | |
102 | { | |
103 | if (eprom_mtd) { | |
ee0e87b1 | 104 | mtd_device_unregister(eprom_mtd); |
1da177e4 LT |
105 | map_destroy(eprom_mtd); |
106 | } | |
107 | ||
7029eef8 | 108 | mtd_device_unregister(flash_mtd); |
1da177e4 LT |
109 | map_destroy(flash_mtd); |
110 | } | |
111 | ||
112 | module_init(init_soleng_maps); | |
113 | module_exit(cleanup_soleng_maps); | |
114 | ||
115 | MODULE_LICENSE("GPL"); | |
116 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
117 | MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards"); | |
118 |