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/*

 * Flash device on lasat 100 and 200 boards

 *

 * Presumably (C) 2002 Brian Murphy <brian@murphy.dk> or whoever he

 * works for.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License version

 * 2 as published by the Free Software Foundation.

 *

 * $Id: lasat.c,v 1.1.1.1 2004-04-15 01:51:46 phoenix Exp $

 *

 */

#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/mtd/partitions.h>

#include <linux/config.h>

#include <asm/lasat/lasat.h>

#include <asm/lasat/lasat_mtd.h>

static struct mtd_info *mymtd;

static __u8 sp_read8(struct map_info *map, unsigned long ofs)

{

        return __raw_readb(map->map_priv_1 + ofs);

}

static __u16 sp_read16(struct map_info *map, unsigned long ofs)

{

        return __raw_readw(map->map_priv_1 + ofs);

}

static __u32 sp_read32(struct map_info *map, unsigned long ofs)

{

        return __raw_readl(map->map_priv_1 + ofs);

}

static void sp_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)

{

        memcpy_fromio(to, map->map_priv_1 + from, len);

}

static void sp_write8(struct map_info *map, __u8 d, unsigned long adr)

{

        __raw_writeb(d, map->map_priv_1 + adr);

        mb();

}

static void sp_write16(struct map_info *map, __u16 d, unsigned long adr)

{

        __raw_writew(d, map->map_priv_1 + adr);

        mb();

}

static void sp_write32(struct map_info *map, __u32 d, unsigned long adr)

{

        __raw_writel(d, map->map_priv_1 + adr);

        mb();

}

static void sp_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)

{

        memcpy_toio(map->map_priv_1 + to, from, len);

}

static struct map_info sp_map = {

        .name = "SP flash",

        .buswidth = 4,

        .read8 = sp_read8,

        .read16 = sp_read16,

        .read32 = sp_read32,

        .copy_from = sp_copy_from,

        .write8 = sp_write8,

        .write16 = sp_write16,

        .write32 = sp_write32,

        .copy_to = sp_copy_to

};

static struct mtd_partition partition_info[LASAT_MTD_LAST];

static char *lasat_mtd_partnames[] = {"Bootloader", "Service", "Normal", "Filesystem", "Config"};

static int __init init_sp(void)

{

        int i;

        /* this does not play well with the old flash code which

         * protects and uprotects the flash when necessary */

        printk(KERN_NOTICE "Unprotecting flash\n");

        *lasat_misc->flash_wp_reg |= 1 << lasat_misc->flash_wp_bit;

        sp_map.map_priv_1 = lasat_flash_partition_start(LASAT_MTD_BOOTLOADER);

        sp_map.size = lasat_board_info.li_flash_size;

        printk(KERN_NOTICE "sp flash device: %lx at %lx\n",

                        sp_map.size, sp_map.map_priv_1);

        for (i=0; i < LASAT_MTD_LAST; i++)

                partition_info[i].name = lasat_mtd_partnames[i];

        mymtd = do_map_probe("cfi_probe", &sp_map);

        if (mymtd) {

                u32 size, offset = 0;

                mymtd->module = THIS_MODULE;

                for (i=0; i < LASAT_MTD_LAST; i++) {

                        size = lasat_flash_partition_size(i);

                        partition_info[i].size = size;

                        partition_info[i].offset = offset;

                        offset += size;

                }

                add_mtd_partitions( mymtd, partition_info, LASAT_MTD_LAST );

                return 0;

        }

        return -ENXIO;

}

static void __exit cleanup_sp(void)

{

        if (mymtd) {

                del_mtd_partitions(mymtd);

                map_destroy(mymtd);

        }

        if (sp_map.map_priv_1) {

                sp_map.map_priv_1 = 0;

        }

}

module_init(init_sp);

module_exit(cleanup_sp);

MODULE_LICENSE("GPL");

MODULE_AUTHOR("Brian Murphy <brian@murphy.dk>");

MODULE_DESCRIPTION("Lasat Safepipe/Masquerade MTD map driver");