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