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