/* * $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_PARTITIONSstatic 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");