arch/arm/mach-s3c2410/nor-simtec.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 #include <mach/bast-map.h>
  31 #include <mach/bast-cpld.h>
  32
  33 #include "nor-simtec.h"
  34
  35 static void simtec_nor_vpp(struct map_info *map, int vpp)
  36 {
  37         unsigned int val;
  38         unsigned long flags;
  39
  40         local_irq_save(flags);
  41         val = __raw_readb(BAST_VA_CTRL3);
  42
  43         printk(KERN_DEBUG "%s(%d)\n", __func__, vpp);
  44
  45         if (vpp)
  46                 val |= BAST_CPLD_CTRL3_ROMWEN;
  47         else
  48                 val &= ~BAST_CPLD_CTRL3_ROMWEN;
  49
  50         __raw_writeb(val, BAST_VA_CTRL3);
  51         local_irq_restore(flags);
  52 }
  53
  54 static struct physmap_flash_data simtec_nor_pdata = {
  55         .width          = 2,
  56         .set_vpp        = simtec_nor_vpp,
  57         .nr_parts       = 0,
  58 };
  59
  60 static struct resource simtec_nor_resource[] = {
  61         [0] = {
  62                 .start = S3C2410_CS1 + 0x4000000,
  63                 .end   = S3C2410_CS1 + 0x4000000 + SZ_8M - 1,
  64                 .flags = IORESOURCE_MEM,
  65         }
  66 };
  67
  68 static struct platform_device simtec_device_nor = {
  69         .name           = "physmap-flash",
  70         .id             = -1,
  71         .num_resources  = ARRAY_SIZE(simtec_nor_resource),
  72         .resource       = simtec_nor_resource,
  73         .dev            = {
  74                 .platform_data = &simtec_nor_pdata,
  75         },
  76 };
  77
  78 void __init nor_simtec_init(void)
  79 {
  80         int ret;
  81
  82         ret = platform_device_register(&simtec_device_nor);
  83         if (ret < 0)
  84                 printk(KERN_ERR "failed to register physmap-flash device\n");
  85         else
  86                 simtec_nor_vpp(NULL, 1);
  87 }