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nor-simtec.c

/* linux/arch/arm/mach-s3c2410/nor-simtec.c
 *
 * Copyright (c) 2008 Simtec Electronics
 *    http://armlinux.simtec.co.uk/
 *    Ben Dooks <ben@simtec.co.uk>
 *
 * 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 "nor-simtec.h"

static void simtec_nor_vpp(struct map_info *map, int vpp)
{
      unsigned int val;
      unsigned long flags;

      local_irq_save(flags);
      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);
      local_irq_restore(flags);
}

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] = {
            .start = S3C2410_CS1 + 0x4000000,
            .end   = S3C2410_CS1 + 0x4000000 + SZ_8M - 1,
            .flags = IORESOURCE_MEM,
      }
};

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);
}

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