diff options
Diffstat (limited to 'drivers/mtd/maps/physmap.c')
| -rw-r--r-- | drivers/mtd/maps/physmap.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c new file mode 100644 index 00000000000..b853670bfb8 --- /dev/null +++ b/drivers/mtd/maps/physmap.c @@ -0,0 +1,125 @@ +/* + * $Id: physmap.c,v 1.37 2004/11/28 09:40:40 dwmw2 Exp $ + * + * Normal mappings of chips in physical memory + * + * Copyright (C) 2003 MontaVista Software Inc. + * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net + * + * 031022 - [jsun] add run-time configure and partition setup + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <asm/io.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/config.h> +#include <linux/mtd/partitions.h> + +static struct mtd_info *mymtd; + +struct map_info physmap_map = { + .name = "phys_mapped_flash", + .phys = CONFIG_MTD_PHYSMAP_START, + .size = CONFIG_MTD_PHYSMAP_LEN, + .bankwidth = CONFIG_MTD_PHYSMAP_BANKWIDTH, +}; + +#ifdef CONFIG_MTD_PARTITIONS +static struct mtd_partition *mtd_parts; +static int mtd_parts_nb; + +static int num_physmap_partitions; +static struct mtd_partition *physmap_partitions; + +static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL}; + +void physmap_set_partitions(struct mtd_partition *parts, int num_parts) +{ + physmap_partitions=parts; + num_physmap_partitions=num_parts; +} +#endif /* CONFIG_MTD_PARTITIONS */ + +static int __init init_physmap(void) +{ + static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL }; + const char **type; + + printk(KERN_NOTICE "physmap flash device: %lx at %lx\n", physmap_map.size, physmap_map.phys); + physmap_map.virt = ioremap(physmap_map.phys, physmap_map.size); + + if (!physmap_map.virt) { + printk("Failed to ioremap\n"); + return -EIO; + } + + simple_map_init(&physmap_map); + + mymtd = NULL; + type = rom_probe_types; + for(; !mymtd && *type; type++) { + mymtd = do_map_probe(*type, &physmap_map); + } + if (mymtd) { + mymtd->owner = THIS_MODULE; + +#ifdef CONFIG_MTD_PARTITIONS + mtd_parts_nb = parse_mtd_partitions(mymtd, part_probes, + &mtd_parts, 0); + + if (mtd_parts_nb > 0) + { + add_mtd_partitions (mymtd, mtd_parts, mtd_parts_nb); + return 0; + } + + if (num_physmap_partitions != 0) + { + printk(KERN_NOTICE + "Using physmap partition definition\n"); + add_mtd_partitions (mymtd, physmap_partitions, num_physmap_partitions); + return 0; + } + +#endif + add_mtd_device(mymtd); + + return 0; + } + + iounmap(physmap_map.virt); + return -ENXIO; +} + +static void __exit cleanup_physmap(void) +{ +#ifdef CONFIG_MTD_PARTITIONS + if (mtd_parts_nb) { + del_mtd_partitions(mymtd); + kfree(mtd_parts); + } else if (num_physmap_partitions) { + del_mtd_partitions(mymtd); + } else { + del_mtd_device(mymtd); + } +#else + del_mtd_device(mymtd); +#endif + map_destroy(mymtd); + + iounmap(physmap_map.virt); + physmap_map.virt = NULL; +} + +module_init(init_physmap); +module_exit(cleanup_physmap); + + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); +MODULE_DESCRIPTION("Generic configurable MTD map driver"); |