release/src-rt-6.x/linux/linux-2.6/drivers/mtd/maps/mtx-1_flash.c

   1 /*
   2  * Flash memory access on 4G Systems MTX-1 boards
   3  *
   4  * $Id: mtx-1_flash.c,v 1.2 2005/11/07 11:14:27 gleixner Exp $
   5  *
   6  * (C) 2005 Bruno Randolf <bruno.randolf@4g-systems.biz>
   7  * (C) 2005 Jörn Engel <joern@wohnheim.fh-wedel.de>
   8  *
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/types.h>
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15
  16 #include <linux/mtd/mtd.h>
  17 #include <linux/mtd/map.h>
  18 #include <linux/mtd/partitions.h>
  19
  20 #include <asm/io.h>
  21
  22 static struct map_info mtx1_map = {
  23         .name = "MTX-1 flash",
  24         .bankwidth = 4,
  25         .size = 0x2000000,
  26         .phys = 0x1E000000,
  27 };
  28
  29 static struct mtd_partition mtx1_partitions[] = {
  30         {
  31                 .name = "filesystem",
  32                 .size = 0x01C00000,
  33                 .offset = 0,
  34         },{
  35                 .name = "yamon",
  36                 .size = 0x00100000,
  37                 .offset = MTDPART_OFS_APPEND,
  38                 .mask_flags = MTD_WRITEABLE,
  39         },{
  40                 .name = "kernel",
  41                 .size = 0x002c0000,
  42                 .offset = MTDPART_OFS_APPEND,
  43         },{
  44                 .name = "yamon env",
  45                 .size = 0x00040000,
  46                 .offset = MTDPART_OFS_APPEND,
  47         }
  48 };
  49
  50 static struct mtd_info *mtx1_mtd;
  51
  52 int __init mtx1_mtd_init(void)
  53 {
  54         int ret = -ENXIO;
  55
  56         simple_map_init(&mtx1_map);
  57
  58         mtx1_map.virt = ioremap(mtx1_map.phys, mtx1_map.size);
  59         if (!mtx1_map.virt)
  60                 return -EIO;
  61
  62         mtx1_mtd = do_map_probe("cfi_probe", &mtx1_map);
  63         if (!mtx1_mtd)
  64                 goto err;
  65
  66         mtx1_mtd->owner = THIS_MODULE;
  67
  68         ret = add_mtd_partitions(mtx1_mtd, mtx1_partitions,
  69                         ARRAY_SIZE(mtx1_partitions));
  70         if (ret)
  71                 goto err;
  72
  73         return 0;
  74
  75 err:
  76        iounmap(mtx1_map.virt);
  77        return ret;
  78 }
  79
  80 static void __exit mtx1_mtd_cleanup(void)
  81 {
  82         if (mtx1_mtd) {
  83                 del_mtd_partitions(mtx1_mtd);
  84                 map_destroy(mtx1_mtd);
  85         }
  86         if (mtx1_map.virt)
  87                 iounmap(mtx1_map.virt);
  88 }
  89
  90 module_init(mtx1_mtd_init);
  91 module_exit(mtx1_mtd_cleanup);
  92
  93 MODULE_AUTHOR("Bruno Randolf <bruno.randolf@4g-systems.biz>");
  94 MODULE_DESCRIPTION("MTX-1 flash map");
  95 MODULE_LICENSE("GPL");