drivers/mtd/maps/mpc1211.c

   1 /*
   2  * Flash on MPC-1211
   3  *
   4  * $Id: mpc1211.c,v 1.4 2004/09/16 23:27:13 gleixner Exp $
   5  *
   6  * (C) 2002 Interface, Saito.K & Jeanne
   7  *
   8  * GPL'd
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/types.h>
  13 #include <linux/kernel.h>
  14 #include <asm/io.h>
  15 #include <linux/mtd/mtd.h>
  16 #include <linux/mtd/map.h>
  17 #include <linux/mtd/partitions.h>
  18
  19 static struct mtd_info *flash_mtd;
  20 static struct mtd_partition *parsed_parts;
  21
  22 struct map_info mpc1211_flash_map = {
  23         .name           = "MPC-1211 FLASH",
  24         .size           = 0x80000,
  25         .bankwidth      = 1,
  26 };
  27
  28 static struct mtd_partition mpc1211_partitions[] = {
  29         {
  30                 .name   = "IPL & ETH-BOOT",
  31                 .offset = 0x00000000,
  32                 .size   = 0x10000,
  33         },
  34         {
  35                 .name   = "Flash FS",
  36                 .offset = 0x00010000,
  37                 .size   = MTDPART_SIZ_FULL,
  38         }
  39 };
  40
  41 static int __init init_mpc1211_maps(void)
  42 {
  43         int nr_parts;
  44
  45         mpc1211_flash_map.phys = 0;
  46         mpc1211_flash_map.virt = (void __iomem *)P2SEGADDR(0);
  47
  48         simple_map_init(&mpc1211_flash_map);
  49
  50         printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n");
  51         flash_mtd = do_map_probe("jedec_probe", &mpc1211_flash_map);
  52         if (!flash_mtd) {
  53                 printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");
  54                 return -ENXIO;
  55         }
  56         printk(KERN_NOTICE "MPC-1211: Flash at 0x%08lx\n", mpc1211_flash_map.virt & 0x1fffffff);
  57         flash_mtd->module = THIS_MODULE;
  58
  59         parsed_parts = mpc1211_partitions;
  60         nr_parts = ARRAY_SIZE(mpc1211_partitions);
  61
  62         add_mtd_partitions(flash_mtd, parsed_parts, nr_parts);
  63         return 0;
  64 }
  65
  66 static void __exit cleanup_mpc1211_maps(void)
  67 {
  68         if (parsed_parts)
  69                 del_mtd_partitions(flash_mtd);
  70         else
  71                 del_mtd_device(flash_mtd);
  72         map_destroy(flash_mtd);
  73 }
  74
  75 module_init(init_mpc1211_maps);
  76 module_exit(cleanup_mpc1211_maps);
  77
  78 MODULE_LICENSE("GPL");
  79 MODULE_AUTHOR("Saito.K & Jeanne <ksaito@interface.co.jp>");
  80 MODULE_DESCRIPTION("MTD map driver for MPC-1211 boards. Interface");