/*
 * $Id: physmap64.c,v 1.1 2002/09/05 05:12:32 acurtis 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/cfi.h>

#ifdef CONFIG_MTD_PARTITIONS
#include <linux/mtd/partitions.h>
#endif

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

static struct mtd_info *mymtd;

__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);
}

__u64 physmap_read64(struct map_info *map, unsigned long ofs)
{
        return __raw_readll(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_write64(struct map_info *map, __u64 d, unsigned long adr)
{
        __raw_writell(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,
        read64: physmap_read64,
        copy_from: physmap_copy_from,
        write8: physmap_write8,
        write16: physmap_write16,
        write32: physmap_write32,
        write64: physmap_write64,
        copy_to: physmap_copy_to
};

#ifdef CONFIG_MTD_PARTITIONS
#ifdef CONFIG_MTD_CMDLINE_PARTS
static struct mtd_partition *mtd_parts = 0;
static int                   mtd_parts_nb = 0;
#else
static struct mtd_partition physmap_partitions[] = {
/* Put your own partition definitions here */
#if 0
        {
                name:           "bootROM",
                size:           0x80000,
                offset:         0,
                mask_flags:     MTD_WRITEABLE,  /* force read-only */
        }, {
                name:           "zImage",
                size:           0x100000,
                offset:         MTDPART_OFS_APPEND,
                mask_flags:     MTD_WRITEABLE,  /* force read-only */
        }, {
                name:           "ramdisk.gz",
                size:           0x300000,
                offset:         MTDPART_OFS_APPEND,
                mask_flags:     MTD_WRITEABLE,  /* force read-only */
        }, {
                name:           "User FS",
                size:           MTDPART_SIZ_FULL,
                offset:         MTDPART_OFS_APPEND,
        }
#endif
};

#define NUM_PARTITIONS  (sizeof(physmap_partitions)/sizeof(struct mtd_partition))

#endif
#endif

int __init init_physmap(void)
{
        static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", 0 };
        const char **type;

        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 = 0;
        type = rom_probe_types;
        for(; !mymtd && *type; type++) {
                mymtd = do_map_probe(*type, &physmap_map);
        }
        if (mymtd) {
                mymtd->module = THIS_MODULE;

                add_mtd_device(mymtd);
#ifdef CONFIG_MTD_PARTITIONS
#ifdef CONFIG_MTD_CMDLINE_PARTS
                mtd_parts_nb = parse_cmdline_partitions(mymtd, &mtd_parts, 
                                                        "phys");
                if (mtd_parts_nb > 0)
                {
                        printk(KERN_NOTICE 
                               "Using command line partition definition\n");
                        add_mtd_partitions (mymtd, mtd_parts, mtd_parts_nb);
                }
#else
                if (NUM_PARTITIONS != 0) 
                {
                        printk(KERN_NOTICE 
                               "Using physmap partition definition\n");
                        add_mtd_partitions (mymtd, physmap_partitions, NUM_PARTITIONS);
                }

#endif
#endif
                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);


MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("Generic configurable MTD map driver");