LXR linux/arch/arm/mach-s3c24xx/simtec-nor.c

   1/* linux/arch/arm/mach-s3c2410/nor-simtec.c
   2 *
   3 * Copyright (c) 2008 Simtec Electronics
   4 *      http://armlinux.simtec.co.uk/
   5 *      Ben Dooks <ben@simtec.co.uk>
   6 *
   7 * Simtec NOR mapping
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License version 2 as
  11 * published by the Free Software Foundation.
  12*/
  13
  14#include <linux/module.h>
  15#include <linux/types.h>
  16#include <linux/init.h>
  17#include <linux/kernel.h>
  18#include <linux/platform_device.h>
  19
  20#include <linux/mtd/mtd.h>
  21#include <linux/mtd/map.h>
  22#include <linux/mtd/physmap.h>
  23#include <linux/mtd/partitions.h>
  24
  25#include <asm/mach/arch.h>
  26#include <asm/mach/map.h>
  27#include <asm/mach/irq.h>
  28
  29#include <mach/map.h>
  30
  31#include "bast.h"
  32#include "simtec.h"
  33
  34static void simtec_nor_vpp(struct platform_device *pdev, int vpp)
  35{
  36        unsigned int val;
  37
  38        val = __raw_readb(BAST_VA_CTRL3);
  39
  40        printk(KERN_DEBUG "%s(%d)\n", __func__, vpp);
  41
  42        if (vpp)
  43                val |= BAST_CPLD_CTRL3_ROMWEN;
  44        else
  45                val &= ~BAST_CPLD_CTRL3_ROMWEN;
  46
  47        __raw_writeb(val, BAST_VA_CTRL3);
  48}
  49
  50static struct physmap_flash_data simtec_nor_pdata = {
  51        .width          = 2,
  52        .set_vpp        = simtec_nor_vpp,
  53        .nr_parts       = 0,
  54};
  55
  56static struct resource simtec_nor_resource[] = {
  57        [0] = DEFINE_RES_MEM(S3C2410_CS1 + 0x4000000, SZ_8M),
  58};
  59
  60static struct platform_device simtec_device_nor = {
  61        .name           = "physmap-flash",
  62        .id             = -1,
  63        .num_resources  = ARRAY_SIZE(simtec_nor_resource),
  64        .resource       = simtec_nor_resource,
  65        .dev            = {
  66                .platform_data = &simtec_nor_pdata,
  67        },
  68};
  69
  70void __init nor_simtec_init(void)
  71{
  72        int ret;
  73
  74        ret = platform_device_register(&simtec_device_nor);
  75        if (ret < 0)
  76                printk(KERN_ERR "failed to register physmap-flash device\n");
  77        else
  78                simtec_nor_vpp(NULL, 1);
  79}
  80