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/*
* $Id: solutionengine.c,v 1.14 2004/09/16 23:27:14 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/config.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");
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