/*
 * $Id: physmap.c,v 1.14 2001/07/14 00:59:17 thockin Exp $
 *
 * Normal mappings of chips in physical memory
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/config.h>

#include <linux/mtd/partitions.h>        /*belz*/

#define WINDOW_ADDR CONFIG_MTD_PHYSMAP_START
#define WINDOW_SIZE CONFIG_MTD_PHYSMAP_LEN
#define BUSWIDTH CONFIG_MTD_PHYSMAP_BUSWIDTH


struct mtd_part_def //belz 
{
    int nums;
    unsigned char *type;
    struct mtd_partition* mtd_part;
};


static struct mtd_info *mymtd;
static struct mtd_part_def part_banks; //belz

__u8 physmap_read8(struct map_info *map, unsigned long ofs)
{
	return __raw_readb(map->map_priv_1 + ofs);
}

__u16 physmap_read16(struct map_info *map, unsigned long ofs)
{
	return __raw_readw(map->map_priv_1 + ofs);
}

__u32 physmap_read32(struct map_info *map, unsigned long ofs)
{
	return __raw_readl(map->map_priv_1 + ofs);
}

void physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
	memcpy_fromio(to, map->map_priv_1 + from, len);
}

void physmap_write8(struct map_info *map, __u8 d, unsigned long adr)
{
	__raw_writeb(d, map->map_priv_1 + adr);
	mb();
}

void physmap_write16(struct map_info *map, __u16 d, unsigned long adr)
{
	__raw_writew(d, map->map_priv_1 + adr);
	mb();
}

void physmap_write32(struct map_info *map, __u32 d, unsigned long adr)
{
	__raw_writel(d, map->map_priv_1 + adr);
	mb();
}

void physmap_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
{
	memcpy_toio(map->map_priv_1 + to, from, len);
}

struct map_info physmap_map = {
	name: "Physically mapped flash",
	size: WINDOW_SIZE,
	buswidth: BUSWIDTH,
	read8: physmap_read8,
	read16: physmap_read16,
	read32: physmap_read32,
	copy_from: physmap_copy_from,
	write8: physmap_write8,
	write16: physmap_write16,
	write32: physmap_write32,
	copy_to: physmap_copy_to
};

//belz
#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition physmap_partitions[] = {
    {
	name: "boot ro",
	offset: 0x00000000,
	size: 0x00010000,		//64k
	mask_flags: MTD_WRITEABLE,	//force ro (read-only)
    },
    {
	name: "zimage ro",
	offset: 0x00010000,
	size: 0x002e0000,		//3mb
	mask_flags: MTD_WRITEABLE,	//force ro (read-only)
    },
    {
	name: "jffs",
	offset: 0x00300000,
	size: 0x00070000,		// 1/2 mb
    },
    {
	name: "jffs backup",
	offset: 0x00370000,
	size: 0x00070000,		// 1/2 mb
    }
};
#endif
//endbelz

#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
#define init_physmap init_module
#define cleanup_physmap cleanup_module
#endif

int __init init_physmap(void)
{
       	printk(KERN_NOTICE "physmap flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
	physmap_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);

	if (!physmap_map.map_priv_1) {
		printk("Failed to ioremap\n");
		return -EIO;
	}
	mymtd = do_map_probe("cfi_probe", &physmap_map);
	if (mymtd) {
		mymtd->module = THIS_MODULE;
//belz
#ifdef CONFIG_MTD_PARTITIONS
		part_banks.mtd_part = physmap_partitions;
		part_banks.type = "Boot, Images and File System";
		part_banks.nums = 4;
		printk("Physmap Flash: Using %s partition definition\n", part_banks.type);
		add_mtd_partitions(mymtd, part_banks.mtd_part, part_banks.nums);
#else
		add_mtd_device(mymtd);
#endif
//endblez
		return 0;
	}
	iounmap((void *)physmap_map.map_priv_1);
	return -ENXIO;
}

static void __exit cleanup_physmap(void)
{
	if (mymtd) {
		del_mtd_device(mymtd);
		map_destroy(mymtd);
	}
	if (physmap_map.map_priv_1) {
		iounmap((void *)physmap_map.map_priv_1);
		physmap_map.map_priv_1 = 0;
	}
}

module_init(init_physmap);
module_exit(cleanup_physmap);