drivers/mtd/maps/beech-mtd.c

   1 /*
   2  * $Id: beech-mtd.c,v 1.11 2005/11/07 11:14:26 gleixner Exp $
   3  *
   4  * drivers/mtd/maps/beech-mtd.c MTD mappings and partition tables for
   5  *                              IBM 405LP Beech boards.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  *
  21  * Copyright (C) 2002, International Business Machines Corporation
  22  * All Rights Reserved.
  23  *
  24  * Bishop Brock
  25  * IBM Research, Austin Center for Low-Power Computing
  26  * bcbrock@us.ibm.com
  27  * March 2002
  28  *
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/types.h>
  34 #include <linux/init.h>
  35
  36 #include <linux/mtd/mtd.h>
  37 #include <linux/mtd/map.h>
  38 #include <linux/mtd/partitions.h>
  39
  40 #include <asm/io.h>
  41 #include <asm/ibm4xx.h>
  42
  43 #define NAME     "Beech Linux Flash"
  44 #define PADDR    BEECH_BIGFLASH_PADDR
  45 #define SIZE     BEECH_BIGFLASH_SIZE
  46 #define BUSWIDTH 1
  47
  48 /* Flash memories on these boards are memory resources, accessed big-endian. */
  49
  50
  51 static struct map_info beech_mtd_map = {
  52         .name =         NAME,
  53         .size =         SIZE,
  54         .bankwidth =    BUSWIDTH,
  55         .phys =         PADDR
  56 };
  57
  58 static struct mtd_info *beech_mtd;
  59
  60 static struct mtd_partition beech_partitions[2] = {
  61         {
  62               .name = "Linux Kernel",
  63               .size = BEECH_KERNEL_SIZE,
  64               .offset = BEECH_KERNEL_OFFSET
  65         }, {
  66               .name = "Free Area",
  67               .size = BEECH_FREE_AREA_SIZE,
  68               .offset = BEECH_FREE_AREA_OFFSET
  69         }
  70 };
  71
  72 static int __init
  73 init_beech_mtd(void)
  74 {
  75         int err;
  76
  77         printk("%s: 0x%08x at 0x%08x\n", NAME, SIZE, PADDR);
  78
  79         beech_mtd_map.virt = ioremap(PADDR, SIZE);
  80
  81         if (!beech_mtd_map.virt) {
  82                 printk("%s: failed to ioremap 0x%x\n", NAME, PADDR);
  83                 return -EIO;
  84         }
  85
  86         simple_map_init(&beech_mtd_map);
  87
  88         printk("%s: probing %d-bit flash bus\n", NAME, BUSWIDTH * 8);
  89         beech_mtd = do_map_probe("cfi_probe", &beech_mtd_map);
  90
  91         if (!beech_mtd) {
  92                 iounmap(beech_mtd_map.virt);
  93                 return -ENXIO;
  94         }
  95
  96         beech_mtd->owner = THIS_MODULE;
  97
  98         err = add_mtd_partitions(beech_mtd, beech_partitions, 2);
  99         if (err) {
 100                 printk("%s: add_mtd_partitions failed\n", NAME);
 101                 iounmap(beech_mtd_map.virt);
 102         }
 103
 104         return err;
 105 }
 106
 107 static void __exit
 108 cleanup_beech_mtd(void)
 109 {
 110         if (beech_mtd) {
 111                 del_mtd_partitions(beech_mtd);
 112                 map_destroy(beech_mtd);
 113                 iounmap((void *) beech_mtd_map.virt);
 114         }
 115 }
 116
 117 module_init(init_beech_mtd);
 118 module_exit(cleanup_beech_mtd);
 119
 120 MODULE_LICENSE("GPL");
 121 MODULE_AUTHOR("Bishop Brock <bcbrock@us.ibm.com>");
 122 MODULE_DESCRIPTION("MTD map and partitions for IBM 405LP Beech boards");