/* * Flash and EPROM on Hitachi Solution Engine and similar boards. * * (C) 2001 Red Hat, Inc. * * GPL'd */ #include <linux/module.h>#include <linux/types.h>#include <linux/kernel.h>#include <linux/init.h>#include <asm/io.h>#include <linux/mtd/mtd.h>#include <linux/mtd/map.h>#include <linux/mtd/partitions.h>#include <linux/errno.h> static struct mtd_info *flash_mtd;static struct mtd_info *eprom_mtd; struct map_info soleng_eprom_map = {	.name = "Solution Engine EPROM",	.size = 0x400000,	.bankwidth = 4,}; struct map_info soleng_flash_map = {	.name = "Solution Engine FLASH",	.size = 0x400000,	.bankwidth = 4,}; static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL }; static int __init init_soleng_maps(void){	/* First probe at offset 0 */	soleng_flash_map.phys = 0;	soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0);	soleng_eprom_map.phys = 0x01000000;	soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000);	simple_map_init(&soleng_eprom_map);	simple_map_init(&soleng_flash_map); 	printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n");	flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);	if (!flash_mtd) {		/* Not there. Try swapping */		printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n");		soleng_flash_map.phys = 0x01000000;		soleng_flash_map.virt = P2SEGADDR(0x01000000);		soleng_eprom_map.phys = 0;		soleng_eprom_map.virt = P1SEGADDR(0);		flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);		if (!flash_mtd) {			/* Eep. */			printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");			return -ENXIO;		}	}	printk(KERN_NOTICE "Solution Engine: Flash at 0x%pap, EPROM at 0x%pap\n",	       &soleng_flash_map.phys,	       &soleng_eprom_map.phys);	flash_mtd->owner = THIS_MODULE; 	eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map);	if (eprom_mtd) {		eprom_mtd->owner = THIS_MODULE;		mtd_device_register(eprom_mtd, NULL, 0);	} 	mtd_device_parse_register(flash_mtd, probes, NULL, NULL, 0); 	return 0;} static void __exit cleanup_soleng_maps(void){	if (eprom_mtd) {		mtd_device_unregister(eprom_mtd);		map_destroy(eprom_mtd);	} 	mtd_device_unregister(flash_mtd);	map_destroy(flash_mtd);} module_init(init_soleng_maps);module_exit(cleanup_soleng_maps); MODULE_LICENSE("GPL");MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards");