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/*
* Flash memory access on Alchemy Pb1xxx boards
*
* (C) 2001 Pete Popov <ppopov@mvista.com>
*
* $Id: pb1xxx-flash.c,v 1.14 2004/11/04 13:24:15 gleixner Exp $
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <asm/io.h>
#ifdef DEBUG_RW
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif
#ifdef CONFIG_MIPS_PB1000
#define WINDOW_ADDR 0x1F800000
#define WINDOW_SIZE 0x800000
static struct mtd_partition pb1xxx_partitions[] = {
{
.name = "yamon env",
.size = 0x00020000,
.offset = 0,
.mask_flags = MTD_WRITEABLE},
{
.name = "User FS",
.size = 0x003e0000,
.offset = 0x20000,},
{
.name = "boot code",
.size = 0x100000,
.offset = 0x400000,
.mask_flags = MTD_WRITEABLE},
{
.name = "raw/kernel",
.size = 0x300000,
.offset = 0x500000}
};
#elif defined(CONFIG_MIPS_PB1500) || defined(CONFIG_MIPS_PB1100)
#if defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
/* both 32MB banks will be used. Combine the first 32MB bank and the
* first 28MB of the second bank together into a single jffs/jffs2
* partition.
*/
#define WINDOW_ADDR 0x1C000000
#define WINDOW_SIZE 0x4000000
static struct mtd_partition pb1xxx_partitions[] = {
{
.name = "User FS",
.size = 0x3c00000,
.offset = 0x0000000
},{
.name = "yamon",
.size = 0x0100000,
.offset = 0x3c00000,
.mask_flags = MTD_WRITEABLE
},{
.name = "raw kernel",
.size = 0x02c0000,
.offset = 0x3d00000
}
};
#elif defined(CONFIG_MTD_PB1500_BOOT) && !defined(CONFIG_MTD_PB1500_USER)
#define WINDOW_ADDR 0x1E000000
#define WINDOW_SIZE 0x2000000
static struct mtd_partition pb1xxx_partitions[] = {
{
.name = "User FS",
.size = 0x1c00000,
.offset = 0x0000000
},{
.name = "yamon",
.size = 0x0100000,
.offset = 0x1c00000,
.mask_flags = MTD_WRITEABLE
},{
.name = "raw kernel",
.size = 0x02c0000,
.offset = 0x1d00000
}
};
#elif !defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
#define WINDOW_ADDR 0x1C000000
#define WINDOW_SIZE 0x2000000
static struct mtd_partition pb1xxx_partitions[] = {
{
.name = "User FS",
.size = 0x1e00000,
.offset = 0x0000000
},{
.name = "raw kernel",
.size = 0x0200000,
.offset = 0x1e00000,
}
};
#else
#error MTD_PB1500 define combo error /* should never happen */
#endif
#else
#error Unsupported board
#endif
#define NAME "Pb1x00 Linux Flash"
#define PADDR WINDOW_ADDR
#define BUSWIDTH 4
#define SIZE WINDOW_SIZE
#define PARTITIONS 4
static struct map_info pb1xxx_mtd_map = {
.name = NAME,
.size = SIZE,
.bankwidth = BUSWIDTH,
.phys = PADDR,
};
static struct mtd_info *pb1xxx_mtd;
int __init pb1xxx_mtd_init(void)
{
struct mtd_partition *parts;
int nb_parts = 0;
char *part_type;
/*
* Static partition definition selection
*/
part_type = "static";
parts = pb1xxx_partitions;
nb_parts = ARRAY_SIZE(pb1xxx_partitions);
/*
* Now let's probe for the actual flash. Do it here since
* specific machine settings might have been set above.
*/
printk(KERN_NOTICE "Pb1xxx flash: probing %d-bit flash bus\n",
BUSWIDTH*8);
pb1xxx_mtd_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
simple_map_init(&pb1xxx_mtd_map);
pb1xxx_mtd = do_map_probe("cfi_probe", &pb1xxx_mtd_map);
if (!pb1xxx_mtd) return -ENXIO;
pb1xxx_mtd->owner = THIS_MODULE;
add_mtd_partitions(pb1xxx_mtd, parts, nb_parts);
return 0;
}
static void __exit pb1xxx_mtd_cleanup(void)
{
if (pb1xxx_mtd) {
del_mtd_partitions(pb1xxx_mtd);
map_destroy(pb1xxx_mtd);
iounmap((void *) pb1xxx_mtd_map.virt);
}
}
module_init(pb1xxx_mtd_init);
module_exit(pb1xxx_mtd_cleanup);
MODULE_AUTHOR("Pete Popov");
MODULE_DESCRIPTION("Pb1xxx CFI map driver");
MODULE_LICENSE("GPL");
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