simtec-nor.c

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/* linux/arch/arm/mach-s3c2410/nor-simtec.c
 *
 * Copyright (c) 2008 Simtec Electronics
 *  http://armlinux.simtec.co.uk/
 *  Ben Dooks <[email protected]>
 *
 * Simtec NOR mapping
 *
 * 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.
*/

#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/partitions.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <mach/map.h>
#include <mach/bast-map.h>
#include <mach/bast-cpld.h>

#include "simtec.h"

static void simtec_nor_vpp(struct platform_device *pdev, int vpp)
{
    unsigned int val;

    val = __raw_readb(BAST_VA_CTRL3);

    printk(KERN_DEBUG "%s(%d)\n", __func__, vpp);

    if (vpp)
        val |= BAST_CPLD_CTRL3_ROMWEN;
    else
        val &= ~BAST_CPLD_CTRL3_ROMWEN;

    __raw_writeb(val, BAST_VA_CTRL3);
}

static struct physmap_flash_data simtec_nor_pdata = {
    .width      = 2,
    .set_vpp    = simtec_nor_vpp,
    .nr_parts   = 0,
};

static struct resource simtec_nor_resource[] = {
    [0] = DEFINE_RES_MEM(S3C2410_CS1 + 0x4000000, SZ_8M),
};

static struct platform_device simtec_device_nor = {
    .name       = "physmap-flash",
    .id     = -1,
    .num_resources  = ARRAY_SIZE(simtec_nor_resource),
    .resource   = simtec_nor_resource,
    .dev        = {
        .platform_data = &simtec_nor_pdata,
    },
};

void __init nor_simtec_init(void)
{
    int ret;

    ret = platform_device_register(&simtec_device_nor);
    if (ret < 0)
        printk(KERN_ERR "failed to register physmap-flash device\n");
    else
        simtec_nor_vpp(NULL, 1);
}