drivers/mtd/maps/cobra5282.c

   1 /*
   2  *  Copyright  Boris Koprinarov <crumpz@gmail.com>
   3  *
   4  *  cobra5282.c, v 1.14 2005/08/31 13:24:14
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  *
  11  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  12  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  13  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  14  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  15  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  16  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  17  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  18  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  19  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  20  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  21  *
  22  *  You should have received a copy of the  GNU General Public License along
  23  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  24  *  675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/types.h>
  29 #include <linux/kernel.h>
  30 #include <linux/init.h>
  31 #include <asm/io.h>
  32 #include <linux/mtd/mtd.h>
  33 #include <linux/mtd/map.h>
  34 #include <linux/mtd/partitions.h>
  35
  36 #define FLASH_PHYS_ADDR 0xffc00000
  37 #define FLASH_SIZE 0x400000
  38
  39 #define FLASH_PARTITION0_ADDR 0xFFC00000
  40 #define FLASH_PARTITION0_SIZE 0x400000
  41
  42 struct map_info flagadm_map = {
  43                 .name =         "Flash chip on COBRA5282",
  44                 .size =         FLASH_SIZE,
  45                 .bankwidth =    2,
  46 };
  47
  48 struct mtd_partition flagadm_parts[] = {
  49         {
  50                 .name =         "boot (256K)",
  51                 .offset =       0x0,
  52                 .size =         0x40000
  53
  54         },
  55         {
  56                 .name =         "kernel (1408K)",
  57                 .offset =       0x40000,
  58                 .size =         0x160000
  59         },
  60         {
  61                 .name =         "rootfs (2048K)",
  62                 .offset =       0x1A0000,
  63                 .size =         0x200000
  64         },
  65         {
  66                 .name =         "spare (32K)",
  67                 .offset =       0x0,
  68                 .size =         0x8000
  69         },
  70         {
  71                 .name =         "user 1 (384K)",
  72                 .offset =       0x3A0000,
  73                 .size =         0x60000
  74         },
  75         {
  76                 .name =         "user 2 (2432K)",
  77                 .offset =       0x1A0000,
  78                 .size =         0x260000
  79         },
  80         {
  81                 .name =         "complete (4096K)",
  82                 .offset =       0x0,
  83                 .size =         0x400000
  84         }
  85
  86 };
  87
  88 #define PARTITION_COUNT (sizeof(flagadm_parts)/sizeof(struct mtd_partition))
  89
  90 static struct mtd_info *mymtd;
  91
  92 int __init init_flagadm(void)
  93 {
  94         printk(KERN_NOTICE "COBRA5282 flash device: %x at %x\n",
  95                         FLASH_SIZE, FLASH_PHYS_ADDR);
  96
  97         flagadm_map.phys = FLASH_PHYS_ADDR;
  98         flagadm_map.virt = ioremap(FLASH_PHYS_ADDR,
  99                                         FLASH_SIZE);
 100
 101         if (!flagadm_map.virt) {
 102                 printk("Failed to ioremap\n");
 103                 return -EIO;
 104         }
 105
 106         simple_map_init(&flagadm_map);
 107
 108         mymtd = do_map_probe("cfi_probe", &flagadm_map);
 109         if (mymtd) {
 110                 mymtd->owner = THIS_MODULE;
 111                 add_mtd_partitions(mymtd, flagadm_parts, PARTITION_COUNT);
 112                 printk(KERN_NOTICE "COBRA5282 flash device initialized\n");
 113                 return 0;
 114         }
 115
 116         iounmap((void *)flagadm_map.virt);
 117         return -ENXIO;
 118 }
 119
 120 static void __exit cleanup_flagadm(void)
 121 {
 122         if (mymtd) {
 123                 del_mtd_partitions(mymtd);
 124                 map_destroy(mymtd);
 125         }
 126         if (flagadm_map.virt) {
 127                 iounmap((void *)flagadm_map.virt);
 128                 flagadm_map.virt = 0;
 129         }
 130 }
 131
 132 module_init(init_flagadm);
 133 module_exit(cleanup_flagadm);
 134
 135
 136 MODULE_LICENSE("GPL");
 137 MODULE_AUTHOR("Boris Koprinarov <crumpz@gmail.com>");
 138 MODULE_DESCRIPTION("MTD map driver for COBRA5282 board");