mirror of
https://github.com/torvalds/linux.git
synced 2024-12-29 14:21:47 +00:00
6ab3d5624e
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/*
|
|
* NOR Flash memory access on TI Toto board
|
|
*
|
|
* jzhang@ti.com (C) 2003 Texas Instruments.
|
|
*
|
|
* (C) 2002 MontVista Software, Inc.
|
|
*
|
|
* $Id: omap-toto-flash.c,v 1.5 2005/11/07 11:14:27 gleixner Exp $
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/io.h>
|
|
|
|
|
|
#ifndef CONFIG_ARCH_OMAP
|
|
#error This is for OMAP architecture only
|
|
#endif
|
|
|
|
//these lines need be moved to a hardware header file
|
|
#define OMAP_TOTO_FLASH_BASE 0xd8000000
|
|
#define OMAP_TOTO_FLASH_SIZE 0x80000
|
|
|
|
static struct map_info omap_toto_map_flash = {
|
|
.name = "OMAP Toto flash",
|
|
.bankwidth = 2,
|
|
.virt = (void __iomem *)OMAP_TOTO_FLASH_BASE,
|
|
};
|
|
|
|
|
|
static struct mtd_partition toto_flash_partitions[] = {
|
|
{
|
|
.name = "BootLoader",
|
|
.size = 0x00040000, /* hopefully u-boot will stay 128k + 128*/
|
|
.offset = 0,
|
|
.mask_flags = MTD_WRITEABLE, /* force read-only */
|
|
}, {
|
|
.name = "ReservedSpace",
|
|
.size = 0x00030000,
|
|
.offset = MTDPART_OFS_APPEND,
|
|
//mask_flags: MTD_WRITEABLE, /* force read-only */
|
|
}, {
|
|
.name = "EnvArea", /* bottom 64KiB for env vars */
|
|
.size = MTDPART_SIZ_FULL,
|
|
.offset = MTDPART_OFS_APPEND,
|
|
}
|
|
};
|
|
|
|
static struct mtd_partition *parsed_parts;
|
|
|
|
static struct mtd_info *flash_mtd;
|
|
|
|
static int __init init_flash (void)
|
|
{
|
|
|
|
struct mtd_partition *parts;
|
|
int nb_parts = 0;
|
|
int parsed_nr_parts = 0;
|
|
const char *part_type;
|
|
|
|
/*
|
|
* Static partition definition selection
|
|
*/
|
|
part_type = "static";
|
|
|
|
parts = toto_flash_partitions;
|
|
nb_parts = ARRAY_SIZE(toto_flash_partitions);
|
|
omap_toto_map_flash.size = OMAP_TOTO_FLASH_SIZE;
|
|
omap_toto_map_flash.phys = virt_to_phys(OMAP_TOTO_FLASH_BASE);
|
|
|
|
simple_map_init(&omap_toto_map_flash);
|
|
/*
|
|
* Now let's probe for the actual flash. Do it here since
|
|
* specific machine settings might have been set above.
|
|
*/
|
|
printk(KERN_NOTICE "OMAP toto flash: probing %d-bit flash bus\n",
|
|
omap_toto_map_flash.bankwidth*8);
|
|
flash_mtd = do_map_probe("jedec_probe", &omap_toto_map_flash);
|
|
if (!flash_mtd)
|
|
return -ENXIO;
|
|
|
|
if (parsed_nr_parts > 0) {
|
|
parts = parsed_parts;
|
|
nb_parts = parsed_nr_parts;
|
|
}
|
|
|
|
if (nb_parts == 0) {
|
|
printk(KERN_NOTICE "OMAP toto flash: no partition info available,"
|
|
"registering whole flash at once\n");
|
|
if (add_mtd_device(flash_mtd)){
|
|
return -ENXIO;
|
|
}
|
|
} else {
|
|
printk(KERN_NOTICE "Using %s partition definition\n",
|
|
part_type);
|
|
return add_mtd_partitions(flash_mtd, parts, nb_parts);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int __init omap_toto_mtd_init(void)
|
|
{
|
|
int status;
|
|
|
|
if (status = init_flash()) {
|
|
printk(KERN_ERR "OMAP Toto Flash: unable to init map for toto flash\n");
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static void __exit omap_toto_mtd_cleanup(void)
|
|
{
|
|
if (flash_mtd) {
|
|
del_mtd_partitions(flash_mtd);
|
|
map_destroy(flash_mtd);
|
|
kfree(parsed_parts);
|
|
}
|
|
}
|
|
|
|
module_init(omap_toto_mtd_init);
|
|
module_exit(omap_toto_mtd_cleanup);
|
|
|
|
MODULE_AUTHOR("Jian Zhang");
|
|
MODULE_DESCRIPTION("OMAP Toto board map driver");
|
|
MODULE_LICENSE("GPL");
|