mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-22 17:33:01 +00:00
148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
/*
|
|
* $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");
|