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#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>
#ifdef CONFIG_MTD_PARTITIONS
#include <linux/mtd/partitions.h>
#endif
#define WINDOW_ADDR 0x10000000 /* physical properties of flash */
#define WINDOW_SIZE 0x00800000 /* intel 28F640J3A 8MB */
#define BUSWIDTH 2 /* data bus width 16bits */
/* can be "cfi_probe", "jedec_probe", "map_rom", NULL }; */
#define PROBETYPES { "cfi_probe", NULL }
#define MSG_PREFIX "AT91RM9200-NOR:" /* prefix for our printk()'s */
#define MTDID "at91rm9200-%d" /* for mtdparts= partitioning */
static struct mtd_info *mymtd;
struct map_info at91rm9200nor_map = {
.name = "NOR flash on AT91RM9200DK",
.size = WINDOW_SIZE,
.bankwidth = BUSWIDTH,
.phys = WINDOW_ADDR,
};
#ifdef CONFIG_MTD_PARTITIONS
/*
* MTD partitioning stuff
*/
static struct mtd_partition at91rm9200nor_partitions[5] =
{
{
// U-boot 128KB
.name = "U-boot",
.size = 0x20000,
.offset = 0
},
{
// uImage 2MB
.name = "Kernel",
.size = 0x200000,
.offset = 0x20000
},
{
// RootFS 3MB
.name = "RootFS",
.size = 0x300000,
.offset = 0x220000
},
{
// UserFS
.name = "Jffs2",
.size = 0x2C0000,
.offset = 0x520000
},
{
// Parameters
.name = "Parameters",
.size = 0x20000,
.offset = 0x7E0000
},
};
static const char *probes[] = { NULL };
#endif
static int mtd_parts_nb = 0;
static struct mtd_partition *mtd_parts = 0;
int __init init_at91rm9200nor(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);
at91rm9200nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
if (!at91rm9200nor_map.virt) {
printk(MSG_PREFIX "failed to ioremap\n");
return -EIO;
}
simple_map_init(&at91rm9200nor_map);
mymtd = 0;
type = rom_probe_types;
for(; !mymtd && *type; type++) {
mymtd = do_map_probe(*type, &at91rm9200nor_map);
}
if (mymtd) {
mymtd->owner = THIS_MODULE;
#ifdef CONFIG_MTD_PARTITIONS
mtd_parts_nb = parse_mtd_partitions(mymtd, probes, &mtd_parts, 0);
if (mtd_parts_nb > 0)
part_type = "detected";
if (mtd_parts_nb == 0)
{
mtd_parts = at91rm9200nor_partitions;
mtd_parts_nb = ARRAY_SIZE(at91rm9200nor_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 *)at91rm9200nor_map.virt);
return -ENXIO;
}
static void __exit cleanup_at91rm9200nor(void)
{
if (mymtd) {
del_mtd_device(mymtd);
map_destroy(mymtd);
}
if (at91rm9200nor_map.virt) {
iounmap((void *)at91rm9200nor_map.virt);
at91rm9200nor_map.virt = 0;
}
}
module_init(init_at91rm9200nor);
module_exit(cleanup_at91rm9200nor);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marius Groeger ");
MODULE_DESCRIPTION("Generic configurable MTD map driver");
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