diff options
Diffstat (limited to 'linux-2.4.x/drivers/mtd/maps/edb7312.c')
| -rw-r--r-- | linux-2.4.x/drivers/mtd/maps/edb7312.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/linux-2.4.x/drivers/mtd/maps/edb7312.c b/linux-2.4.x/drivers/mtd/maps/edb7312.c new file mode 100644 index 0000000..b48a347 --- /dev/null +++ b/linux-2.4.x/drivers/mtd/maps/edb7312.c @@ -0,0 +1,147 @@ +/* + * $Id: edb7312.c,v 1.14 2005/11/07 11:14:27 gleixner Exp $ + * + * Handle mapping of the NOR flash on Cogent EDB7312 boards + * + * Copyright 2002 SYSGO Real-Time Solutions GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#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/config.h> + +#ifdef CONFIG_MTD_PARTITIONS +#include <linux/mtd/partitions.h> +#endif + +#define WINDOW_ADDR 0x00000000 /* physical properties of flash */ +#define WINDOW_SIZE 0x01000000 +#define BUSWIDTH 2 +#define FLASH_BLOCKSIZE_MAIN 0x20000 +#define FLASH_NUMBLOCKS_MAIN 128 +/* can be "cfi_probe", "jedec_probe", "map_rom", NULL }; */ +#define PROBETYPES { "cfi_probe", NULL } + +#define MSG_PREFIX "EDB7312-NOR:" /* prefix for our printk()'s */ +#define MTDID "edb7312-nor" /* for mtdparts= partitioning */ + +static struct mtd_info *mymtd; + +struct map_info edb7312nor_map = { + .name = "NOR flash on EDB7312", + .size = WINDOW_SIZE, + .bankwidth = BUSWIDTH, + .phys = WINDOW_ADDR, +}; + +#ifdef CONFIG_MTD_PARTITIONS + +/* + * MTD partitioning stuff + */ +static struct mtd_partition static_partitions[3] = +{ + { + .name = "ARMboot", + .size = 0x40000, + .offset = 0 + }, + { + .name = "Kernel", + .size = 0x200000, + .offset = 0x40000 + }, + { + .name = "RootFS", + .size = 0xDC0000, + .offset = 0x240000 + }, +}; + +static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; + +#endif + +static int mtd_parts_nb = 0; +static struct mtd_partition *mtd_parts = 0; + +int __init init_edb7312nor(void) +{ + static const char *rom_probe_types[] = PROBETYPES; + const char **type; + const char *part_type = 0; + + printk(KERN_NOTICE MSG_PREFIX "0x%08x at 0x%08x\n", + WINDOW_SIZE, WINDOW_ADDR); + edb7312nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); + + if (!edb7312nor_map.virt) { + printk(MSG_PREFIX "failed to ioremap\n"); + return -EIO; + } + + simple_map_init(&edb7312nor_map); + + mymtd = 0; + type = rom_probe_types; + for(; !mymtd && *type; type++) { + mymtd = do_map_probe(*type, &edb7312nor_map); + } + if (mymtd) { + mymtd->owner = THIS_MODULE; + +#ifdef CONFIG_MTD_PARTITIONS + mtd_parts_nb = parse_mtd_partitions(mymtd, probes, &mtd_parts, MTDID); + if (mtd_parts_nb > 0) + part_type = "detected"; + + if (mtd_parts_nb == 0) + { + mtd_parts = static_partitions; + mtd_parts_nb = ARRAY_SIZE(static_partitions); + part_type = "static"; + } +#endif + add_mtd_device(mymtd); + if (mtd_parts_nb == 0) + printk(KERN_NOTICE MSG_PREFIX "no partition info available\n"); + else + { + printk(KERN_NOTICE MSG_PREFIX + "using %s partition definition\n", part_type); + add_mtd_partitions(mymtd, mtd_parts, mtd_parts_nb); + } + return 0; + } + + iounmap((void *)edb7312nor_map.virt); + return -ENXIO; +} + +static void __exit cleanup_edb7312nor(void) +{ + if (mymtd) { + del_mtd_device(mymtd); + map_destroy(mymtd); + } + if (edb7312nor_map.virt) { + iounmap((void *)edb7312nor_map.virt); + edb7312nor_map.virt = 0; + } +} + +module_init(init_edb7312nor); +module_exit(cleanup_edb7312nor); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>"); +MODULE_DESCRIPTION("Generic configurable MTD map driver"); |