projects / linux-2.6 / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * $Id: edb7312.c,v 1.13 2004/11/04 13:24:14 gleixner Exp $ | |
| 3 | * | |
| 4 | * Handle mapping of the NOR flash on Cogent EDB7312 boards | |
| 5 | * | |
| 6 | * Copyright 2002 SYSGO Real-Time Solutions GmbH | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/module.h> | |
| 14 | #include <linux/types.h> | |
| 15 | #include <linux/kernel.h> | |
| 16 | #include <linux/init.h> | |
| 17 | #include <asm/io.h> | |
| 18 | #include <linux/mtd/mtd.h> | |
| 19 | #include <linux/mtd/map.h> | |
| 20 | #include <linux/config.h> | |
| 21 | ||
| 22 | #ifdef CONFIG_MTD_PARTITIONS | |
| 23 | #include <linux/mtd/partitions.h> | |
| 24 | #endif | |
| 25 | ||
| 26 | #define WINDOW_ADDR 0x00000000 /* physical properties of flash */ | |
| 27 | #define WINDOW_SIZE 0x01000000 | |
| 28 | #define BUSWIDTH 2 | |
| 29 | #define FLASH_BLOCKSIZE_MAIN 0x20000 | |
| 30 | #define FLASH_NUMBLOCKS_MAIN 128 | |
| 31 | /* can be "cfi_probe", "jedec_probe", "map_rom", NULL }; */ | |
| 32 | #define PROBETYPES { "cfi_probe", NULL } | |
| 33 | ||
| 34 | #define MSG_PREFIX "EDB7312-NOR:" /* prefix for our printk()'s */ | |
| 35 | #define MTDID "edb7312-nor" /* for mtdparts= partitioning */ | |
| 36 | ||
| 37 | static struct mtd_info *mymtd; | |
| 38 | ||
| 39 | struct map_info edb7312nor_map = { | |
| 40 | .name = "NOR flash on EDB7312", | |
| 41 | .size = WINDOW_SIZE, | |
| 42 | .bankwidth = BUSWIDTH, | |
| 43 | .phys = WINDOW_ADDR, | |
| 44 | }; | |
| 45 | ||
| 46 | #ifdef CONFIG_MTD_PARTITIONS | |
| 47 | ||
| 48 | /* | |
| 49 | * MTD partitioning stuff | |
| 50 | */ | |
| 51 | static struct mtd_partition static_partitions[3] = | |
| 52 | { | |
| 53 | { | |
| 54 | .name = "ARMboot", | |
| 55 | .size = 0x40000, | |
| 56 | .offset = 0 | |
| 57 | }, | |
| 58 | { | |
| 59 | .name = "Kernel", | |
| 60 | .size = 0x200000, | |
| 61 | .offset = 0x40000 | |
| 62 | }, | |
| 63 | { | |
| 64 | .name = "RootFS", | |
| 65 | .size = 0xDC0000, | |
| 66 | .offset = 0x240000 | |
| 67 | }, | |
| 68 | }; | |
| 69 | ||
| 70 | static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; | |
| 71 | ||
| 72 | #endif | |
| 73 | ||
| 74 | static int mtd_parts_nb = 0; | |
| 75 | static struct mtd_partition *mtd_parts = 0; | |
| 76 | ||
| 77 | int __init init_edb7312nor(void) | |
| 78 | { | |
| 79 | static const char *rom_probe_types[] = PROBETYPES; | |
| 80 | const char **type; | |
| 81 | const char *part_type = 0; | |
| 82 | ||
| 83 | printk(KERN_NOTICE MSG_PREFIX "0x%08x at 0x%08x\n", | |
| 84 | WINDOW_SIZE, WINDOW_ADDR); | |
| 85 | edb7312nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); | |
| 86 | ||
| 87 | if (!edb7312nor_map.virt) { | |
| 88 | printk(MSG_PREFIX "failed to ioremap\n"); | |
| 89 | return -EIO; | |
| 90 | } | |
| 91 | ||
| 92 | simple_map_init(&edb7312nor_map); | |
| 93 | ||
| 94 | mymtd = 0; | |
| 95 | type = rom_probe_types; | |
| 96 | for(; !mymtd && *type; type++) { | |
| 97 | mymtd = do_map_probe(*type, &edb7312nor_map); | |
| 98 | } | |
| 99 | if (mymtd) { | |
| 100 | mymtd->owner = THIS_MODULE; | |
| 101 | ||
| 102 | #ifdef CONFIG_MTD_PARTITIONS | |
| 103 | mtd_parts_nb = parse_mtd_partitions(mymtd, probes, &mtd_parts, MTDID); | |
| 104 | if (mtd_parts_nb > 0) | |
| 105 | part_type = "detected"; | |
| 106 | ||
| 107 | if (mtd_parts_nb == 0) | |
| 108 | { | |
| 109 | mtd_parts = static_partitions; | |
| 110 | mtd_parts_nb = ARRAY_SIZE(static_partitions); | |
| 111 | part_type = "static"; | |
| 112 | } | |
| 113 | #endif | |
| 114 | add_mtd_device(mymtd); | |
| 115 | if (mtd_parts_nb == 0) | |
| 116 | printk(KERN_NOTICE MSG_PREFIX "no partition info available\n"); | |
| 117 | else | |
| 118 | { | |
| 119 | printk(KERN_NOTICE MSG_PREFIX | |
| 120 | "using %s partition definition\n", part_type); | |
| 121 | add_mtd_partitions(mymtd, mtd_parts, mtd_parts_nb); | |
| 122 | } | |
| 123 | return 0; | |
| 124 | } | |
| 125 | ||
| 126 | iounmap((void *)edb7312nor_map.virt); | |
| 127 | return -ENXIO; | |
| 128 | } | |
| 129 | ||
| 130 | static void __exit cleanup_edb7312nor(void) | |
| 131 | { | |
| 132 | if (mymtd) { | |
| 133 | del_mtd_device(mymtd); | |
| 134 | map_destroy(mymtd); | |
| 135 | } | |
| 136 | if (edb7312nor_map.virt) { | |
| 137 | iounmap((void *)edb7312nor_map.virt); | |
| 138 | edb7312nor_map.virt = 0; | |
| 139 | } | |
| 140 | } | |
| 141 | ||
| 142 | module_init(init_edb7312nor); | |
| 143 | module_exit(cleanup_edb7312nor); | |
| 144 | ||
| 145 | MODULE_LICENSE("GPL"); | |
| 146 | MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>"); | |
| 147 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); |