/* * $Id: solutionengine.c,v 1.15 2005/11/07 11:14:28 gleixner Exp $ * * 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; static struct mtd_partition *parsed_parts; 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 *probes[] = { "RedBoot", "cmdlinepart", NULL }; #ifdef CONFIG_MTD_SUPERH_RESERVE static struct mtd_partition superh_se_partitions[] = { /* Reserved for boot code, read-only */ { .name = "flash_boot", .offset = 0x00000000, .size = CONFIG_MTD_SUPERH_RESERVE, .mask_flags = MTD_WRITEABLE, }, /* All else is writable (e.g. JFFS) */ { .name = "Flash FS", .offset = MTDPART_OFS_NXTBLK, .size = MTDPART_SIZ_FULL, } }; #endif /* CONFIG_MTD_SUPERH_RESERVE */ static int __init init_soleng_maps(void) { int nr_parts = 0; /* 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%08lx, EPROM at 0x%08lx\n", soleng_flash_map.phys & 0x1fffffff, soleng_eprom_map.phys & 0x1fffffff); flash_mtd->owner = THIS_MODULE; eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map); if (eprom_mtd) { eprom_mtd->owner = THIS_MODULE; add_mtd_device(eprom_mtd); } nr_parts = parse_mtd_partitions(flash_mtd, probes, &parsed_parts, 0); #ifdef CONFIG_MTD_SUPERH_RESERVE if (nr_parts <= 0) { printk(KERN_NOTICE "Using configured partition at 0x%08x.\n", CONFIG_MTD_SUPERH_RESERVE); parsed_parts = superh_se_partitions; nr_parts = sizeof(superh_se_partitions)/sizeof(*parsed_parts); } #endif /* CONFIG_MTD_SUPERH_RESERVE */ if (nr_parts > 0) add_mtd_partitions(flash_mtd, parsed_parts, nr_parts); else add_mtd_device(flash_mtd); return 0; } static void __exit cleanup_soleng_maps(void) { if (eprom_mtd) { del_mtd_device(eprom_mtd); map_destroy(eprom_mtd); } if (parsed_parts) del_mtd_partitions(flash_mtd); else del_mtd_device(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");