/* * NOR Flash memory access on TI Toto board * * jzhang@ti.com (C) 2003 Texas Instruments. * *  (C) 2002 MontVista Software, Inc. * * $Id: omap-toto-flash.c,v 1.2 2007/09/21 03:09:24 quy Exp $ */#include <linux/config.h>#include <linux/module.h>#include <linux/types.h>#include <linux/kernel.h>#include <linux/errno.h>#include <linux/init.h>#include <linux/mtd/mtd.h>#include <linux/mtd/map.h>#include <linux/mtd/partitions.h>#include <asm/hardware.h>#include <asm/io.h>#ifndef CONFIG_ARCH_OMAP#error This is for OMAP architecture only#endif//these lines need be moved to a hardware header file#define OMAP_TOTO_FLASH_BASE 0xd8000000#define OMAP_TOTO_FLASH_SIZE 0x80000static struct map_info omap_toto_map_flash = {	.name =		"OMAP Toto flash",	.bankwidth =	2,	.virt =		OMAP_TOTO_FLASH_BASE,}; static struct mtd_partition toto_flash_partitions[] = {	{		.name =		"BootLoader",		.size =		0x00040000,     /* hopefully u-boot will stay 128k + 128*/		.offset =	0,		.mask_flags =	MTD_WRITEABLE,  /* force read-only */	}, {		.name =		"ReservedSpace",		.size =		0x00030000,		.offset =	MTDPART_OFS_APPEND,		//mask_flags:	MTD_WRITEABLE,  /* force read-only */	}, {		.name =		"EnvArea",      /* bottom 64KiB for env vars */		.size =		MTDPART_SIZ_FULL,		.offset =	MTDPART_OFS_APPEND,	} };static struct mtd_partition *parsed_parts;static struct mtd_info *flash_mtd; static int __init init_flash (void)   {	struct mtd_partition *parts;	int nb_parts = 0;	int parsed_nr_parts = 0;	const char *part_type; 	/*	 * Static partition definition selection	 */	part_type = "static"; 	parts = toto_flash_partitions;	nb_parts = ARRAY_SIZE(toto_flash_partitions);	omap_toto_map_flash.size = OMAP_TOTO_FLASH_SIZE;	omap_toto_map_flash.phys = virt_to_phys(OMAP_TOTO_FLASH_BASE);	simple_map_init(&omap_toto_map_flash);	/*	 * Now let's probe for the actual flash.  Do it here since	 * specific machine settings might have been set above.	 */	printk(KERN_NOTICE "OMAP toto flash: probing %d-bit flash bus\n",		omap_toto_map_flash.bankwidth*8);	flash_mtd = do_map_probe("jedec_probe", &omap_toto_map_flash);	if (!flash_mtd)		return -ENXIO;  	if (parsed_nr_parts > 0) {		parts = parsed_parts;		nb_parts = parsed_nr_parts;	}	if (nb_parts == 0) {		printk(KERN_NOTICE "OMAP toto flash: no partition info available,"			"registering whole flash at once\n");		if (add_mtd_device(flash_mtd)){            return -ENXIO;        }	} else {		printk(KERN_NOTICE "Using %s partition definition\n",			part_type);		return add_mtd_partitions(flash_mtd, parts, nb_parts);	}	return 0;} int __init omap_toto_mtd_init(void)  {	int status; 	if (status = init_flash()) {		printk(KERN_ERR "OMAP Toto Flash: unable to init map for toto flash\n");	}    return status;}static void  __exit omap_toto_mtd_cleanup(void)  {	if (flash_mtd) {		del_mtd_partitions(flash_mtd);		map_destroy(flash_mtd);		if (parsed_parts)			kfree(parsed_parts);	}}module_init(omap_toto_mtd_init);module_exit(omap_toto_mtd_cleanup);MODULE_AUTHOR("Jian Zhang");MODULE_DESCRIPTION("OMAP Toto board map driver");MODULE_LICENSE("GPL");