/* * 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 1.5 2005/11/07 11:14:27 gleixner 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/slab.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 0x80000 static struct map_info omap_toto_map_flash = { .name = "OMAP Toto flash", .bankwidth = 2, .virt = (void __iomem *)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); 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");