projects / deliverable / linux.git / blame
| 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 | ||
| 22 | static struct mtd_partition *parsed_parts; | |
| 23 | ||
| 24 | struct map_info soleng_eprom_map = { | |
| 25 | .name = "Solution Engine EPROM", | |
| 26 | .size = 0x400000, | |
| 27 | .bankwidth = 4, | |
| 28 | }; | |
| 29 | ||
| 30 | struct map_info soleng_flash_map = { | |
| 31 | .name = "Solution Engine FLASH", | |
| 32 | .size = 0x400000, | |
| 33 | .bankwidth = 4, | |
| 34 | }; | |
| 35 | ||
| 36 | static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; | |
| 37 | ||
| 38 | #ifdef CONFIG_MTD_SUPERH_RESERVE | |
| 39 | static struct mtd_partition superh_se_partitions[] = { | |
| 40 | /* Reserved for boot code, read-only */ | |
| 41 | { | |
| 42 | .name = "flash_boot", | |
| 43 | .offset = 0x00000000, | |
| 44 | .size = CONFIG_MTD_SUPERH_RESERVE, | |
| 45 | .mask_flags = MTD_WRITEABLE, | |
| 46 | }, | |
| 47 | /* All else is writable (e.g. JFFS) */ | |
| 48 | { | |
| 49 | .name = "Flash FS", | |
| 50 | .offset = MTDPART_OFS_NXTBLK, | |
| 51 | .size = MTDPART_SIZ_FULL, | |
| 52 | } | |
| 53 | }; | |
| 54 | #endif /* CONFIG_MTD_SUPERH_RESERVE */ | |
| 55 | ||
| 56 | static int __init init_soleng_maps(void) | |
| 57 | { | |
| 58 | int nr_parts = 0; | |
| 59 | ||
| 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; | |
| 92 | add_mtd_device(eprom_mtd); | |
| 93 | } | |
| 94 | ||
| 95 | nr_parts = parse_mtd_partitions(flash_mtd, probes, &parsed_parts, 0); | |
| 96 | ||
| 97 | #ifdef CONFIG_MTD_SUPERH_RESERVE | |
| 98 | if (nr_parts <= 0) { | |
| 99 | printk(KERN_NOTICE "Using configured partition at 0x%08x.\n", | |
| 100 | CONFIG_MTD_SUPERH_RESERVE); | |
| 101 | parsed_parts = superh_se_partitions; | |
| 102 | nr_parts = sizeof(superh_se_partitions)/sizeof(*parsed_parts); | |
| 103 | } | |
| 104 | #endif /* CONFIG_MTD_SUPERH_RESERVE */ | |
| 105 | ||
| 106 | if (nr_parts > 0) | |
| 107 | add_mtd_partitions(flash_mtd, parsed_parts, nr_parts); | |
| 108 | else | |
| 109 | add_mtd_device(flash_mtd); | |
| 110 | ||
| 111 | return 0; | |
| 112 | } | |
| 113 | ||
| 114 | static void __exit cleanup_soleng_maps(void) | |
| 115 | { | |
| 116 | if (eprom_mtd) { | |
| 117 | del_mtd_device(eprom_mtd); | |
| 118 | map_destroy(eprom_mtd); | |
| 119 | } | |
| 120 | ||
| 121 | if (parsed_parts) | |
| 122 | del_mtd_partitions(flash_mtd); | |
| 123 | else | |
| 124 | del_mtd_device(flash_mtd); | |
| 125 | map_destroy(flash_mtd); | |
| 126 | } | |
| 127 | ||
| 128 | module_init(init_soleng_maps); | |
| 129 | module_exit(cleanup_soleng_maps); | |
| 130 | ||
| 131 | MODULE_LICENSE("GPL"); | |
| 132 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
| 133 | MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards"); | |
| 134 |