projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 2b9175c1 | 2 | * $Id: physmap.c,v 1.39 2005/11/29 14:49:36 gleixner Exp $ |
| 1da177e4 LT |
3 | * |
| 4 | * Normal mappings of chips in physical memory | |
| 5 | * | |
| 6 | * Copyright (C) 2003 MontaVista Software Inc. | |
| 7 | * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net | |
| 8 | * | |
| 9 | * 031022 - [jsun] add run-time configure and partition setup | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/types.h> | |
| 14 | #include <linux/kernel.h> | |
| 15 | #include <linux/init.h> | |
| 16 | #include <linux/slab.h> | |
| 17 | #include <asm/io.h> | |
| 18 | #include <linux/mtd/mtd.h> | |
| 19 | #include <linux/mtd/map.h> | |
| 20 | #include <linux/config.h> | |
| 21 | #include <linux/mtd/partitions.h> | |
| 2b9175c1 | 22 | #include <linux/mtd/physmap.h> |
| 1da177e4 LT |
23 | |
| 24 | static struct mtd_info *mymtd; | |
| 25 | ||
| 26 | struct map_info physmap_map = { | |
| 27 | .name = "phys_mapped_flash", | |
| 28 | .phys = CONFIG_MTD_PHYSMAP_START, | |
| 29 | .size = CONFIG_MTD_PHYSMAP_LEN, | |
| 30 | .bankwidth = CONFIG_MTD_PHYSMAP_BANKWIDTH, | |
| 31 | }; | |
| 32 | ||
| 33 | #ifdef CONFIG_MTD_PARTITIONS | |
| 34 | static struct mtd_partition *mtd_parts; | |
| 35 | static int mtd_parts_nb; | |
| 36 | ||
| 37 | static int num_physmap_partitions; | |
| 38 | static struct mtd_partition *physmap_partitions; | |
| 39 | ||
| 40 | static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL}; | |
| 41 | ||
| 42 | void physmap_set_partitions(struct mtd_partition *parts, int num_parts) | |
| 43 | { | |
| 44 | physmap_partitions=parts; | |
| 45 | num_physmap_partitions=num_parts; | |
| 46 | } | |
| 47 | #endif /* CONFIG_MTD_PARTITIONS */ | |
| 48 | ||
| 49 | static int __init init_physmap(void) | |
| 50 | { | |
| 51 | static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL }; | |
| 52 | const char **type; | |
| 53 | ||
| 54 | printk(KERN_NOTICE "physmap flash device: %lx at %lx\n", physmap_map.size, physmap_map.phys); | |
| 55 | physmap_map.virt = ioremap(physmap_map.phys, physmap_map.size); | |
| 56 | ||
| 57 | if (!physmap_map.virt) { | |
| 58 | printk("Failed to ioremap\n"); | |
| 59 | return -EIO; | |
| 60 | } | |
| 61 | ||
| 62 | simple_map_init(&physmap_map); | |
| 63 | ||
| 64 | mymtd = NULL; | |
| 65 | type = rom_probe_types; | |
| 66 | for(; !mymtd && *type; type++) { | |
| 67 | mymtd = do_map_probe(*type, &physmap_map); | |
| 68 | } | |
| 69 | if (mymtd) { | |
| 70 | mymtd->owner = THIS_MODULE; | |
| 71 | ||
| 72 | #ifdef CONFIG_MTD_PARTITIONS | |
| 69f34c98 | 73 | mtd_parts_nb = parse_mtd_partitions(mymtd, part_probes, |
| 1da177e4 LT |
74 | &mtd_parts, 0); |
| 75 | ||
| 76 | if (mtd_parts_nb > 0) | |
| 77 | { | |
| 78 | add_mtd_partitions (mymtd, mtd_parts, mtd_parts_nb); | |
| 79 | return 0; | |
| 80 | } | |
| 81 | ||
| 69f34c98 | 82 | if (num_physmap_partitions != 0) |
| 1da177e4 | 83 | { |
| 69f34c98 | 84 | printk(KERN_NOTICE |
| 1da177e4 LT |
85 | "Using physmap partition definition\n"); |
| 86 | add_mtd_partitions (mymtd, physmap_partitions, num_physmap_partitions); | |
| 87 | return 0; | |
| 88 | } | |
| 89 | ||
| 90 | #endif | |
| 91 | add_mtd_device(mymtd); | |
| 92 | ||
| 93 | return 0; | |
| 94 | } | |
| 95 | ||
| 96 | iounmap(physmap_map.virt); | |
| 97 | return -ENXIO; | |
| 98 | } | |
| 99 | ||
| 100 | static void __exit cleanup_physmap(void) | |
| 101 | { | |
| 102 | #ifdef CONFIG_MTD_PARTITIONS | |
| 103 | if (mtd_parts_nb) { | |
| 104 | del_mtd_partitions(mymtd); | |
| 105 | kfree(mtd_parts); | |
| 106 | } else if (num_physmap_partitions) { | |
| 107 | del_mtd_partitions(mymtd); | |
| 108 | } else { | |
| 109 | del_mtd_device(mymtd); | |
| 110 | } | |
| 111 | #else | |
| 112 | del_mtd_device(mymtd); | |
| 113 | #endif | |
| 114 | map_destroy(mymtd); | |
| 115 | ||
| 116 | iounmap(physmap_map.virt); | |
| 117 | physmap_map.virt = NULL; | |
| 118 | } | |
| 119 | ||
| 120 | module_init(init_physmap); | |
| 121 | module_exit(cleanup_physmap); | |
| 122 | ||
| 123 | ||
| 124 | MODULE_LICENSE("GPL"); | |
| 125 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
| 126 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); |