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 <asm/arch/map.h>
  30 #include <asm/arch/bast-map.h>
  31 #include <asm/arch/bast-cpld.h>
  32
  33
  34 static void simtec_nor_vpp(struct map_info *map, int vpp)
  35 {
  36         unsigned int val;
  37         unsigned long flags;
  38
  39         local_irq_save(flags);
  40         val = __raw_readb(BAST_VA_CTRL3);
  41
  42         printk(KERN_DEBUG "%s(%d)\n", __func__, vpp);
  43
  44         if (vpp)
  45                 val |= BAST_CPLD_CTRL3_ROMWEN;
  46         else
  47                 val &= ~BAST_CPLD_CTRL3_ROMWEN;
  48
  49         __raw_writeb(val, BAST_VA_CTRL3);
  50         local_irq_restore(flags);
  51 }
  52
  53 struct physmap_flash_data simtec_nor_pdata = {
  54         .width          = 2,
  55         .set_vpp        = simtec_nor_vpp,
  56         .nr_parts       = 0,
  57 };
  58
  59 static struct resource simtec_nor_resource[] = {
  60         [0] = {
  61                 .start = S3C2410_CS1 + 0x4000000,
  62                 .end   = S3C2410_CS1 + 0x4000000 + SZ_8M - 1,
  63                 .flags = IORESOURCE_MEM,
  64         }
  65 };
  66
  67 static struct platform_device simtec_device_nor = {
  68         .name           = "physmap-flash",
  69         .id             = -1,
  70         .num_resources  = ARRAY_SIZE(simtec_nor_resource),
  71         .resource       = simtec_nor_resource,
  72         .dev            = {
  73                 .platform_data = &simtec_nor_pdata,
  74         },
  75 };
  76
  77 void __init nor_simtec_init(void)
  78 {
  79         int ret;
  80
  81         ret = platform_device_register(&simtec_device_nor);
  82         if (ret < 0)
  83                 printk(KERN_ERR "failed to register physmap-flash device\n");
  84         else
  85                 simtec_nor_vpp(NULL, 1);
  86 }