mirror of https://gitee.com/openkylin/linux.git
119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/*
|
|
* 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 *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,
|
|
}
|
|
};
|
|
#define NUM_PARTITIONS ARRAY_SIZE(superh_se_partitions)
|
|
#else
|
|
#define superh_se_partitions NULL
|
|
#define NUM_PARTITIONS 0
|
|
#endif /* CONFIG_MTD_SUPERH_RESERVE */
|
|
|
|
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%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;
|
|
mtd_device_register(eprom_mtd, NULL, 0);
|
|
}
|
|
|
|
mtd_device_parse_register(flash_mtd, probes, 0,
|
|
superh_se_partitions, NUM_PARTITIONS);
|
|
|
|
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");
|
|
|