release/src-rt-6.x/linux/linux-2.6/drivers/mtd/maps/pq2fads.c

   1 /*
   2  * drivers/mtd/maps/pq2fads.c
   3  *
   4  * Mapping for the flash SIMM on 8272ADS and PQ2FADS board
   5  *
   6  * Author: Vitaly Bordug <vbordug@ru.mvista.com>
   7  *
   8  * 2005 (c) MontaVista Software, Inc. This file is licensed under
   9  * the terms of the GNU General Public License version 2. This program
  10  * is licensed "as is" without any warranty of any kind, whether express
  11  * or implied.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <asm/io.h>
  19 #include <asm/ppcboot.h>
  20 #include <linux/mtd/mtd.h>
  21 #include <linux/mtd/map.h>
  22 #include <linux/mtd/partitions.h>
  23 #include <linux/mtd/physmap.h>
  24
  25 /*
  26   NOTE: bank width and interleave relative to the installed flash
  27   should have been chosen within MTD_CFI_GEOMETRY options.
  28   */
  29 #define PQ2FADS_BANK_WIDTH 4
  30
  31 static struct mtd_partition pq2fads_partitions[] = {
  32         {
  33 #ifdef CONFIG_ADS8272
  34                 .name           = "HRCW",
  35                 .size           = 0x40000,
  36                 .offset         = 0,
  37                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
  38         }, {
  39                 .name           = "User FS",
  40                 .size           = 0x5c0000,
  41                 .offset         = 0x40000,
  42 #else
  43                 .name           = "User FS",
  44                 .size           = 0x600000,
  45                 .offset         = 0,
  46 #endif
  47         }, {
  48                 .name           = "uImage",
  49                 .size           = 0x100000,
  50                 .offset         = 0x600000,
  51                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
  52         }, {
  53                 .name           = "bootloader",
  54                 .size           = 0x40000,
  55                 .offset         = 0x700000,
  56                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
  57         }, {
  58                 .name           = "bootloader env",
  59                 .size           = 0x40000,
  60                 .offset         = 0x740000,
  61                 .mask_flags     = MTD_WRITEABLE,  /* force read-only */
  62         }
  63 };
  64
  65
  66 /* pointer to MPC885ADS board info data */
  67 extern unsigned char __res[];
  68
  69 static int __init init_pq2fads_mtd(void)
  70 {
  71         bd_t *bd = (bd_t *)__res;
  72         physmap_configure(bd->bi_flashstart, bd->bi_flashsize, PQ2FADS_BANK_WIDTH, NULL);
  73
  74         physmap_set_partitions(pq2fads_partitions,
  75                                 sizeof (pq2fads_partitions) /
  76                                 sizeof (pq2fads_partitions[0]));
  77         return 0;
  78 }
  79
  80 static void __exit cleanup_pq2fads_mtd(void)
  81 {
  82 }
  83
  84 module_init(init_pq2fads_mtd);
  85 module_exit(cleanup_pq2fads_mtd);
  86
  87 MODULE_LICENSE("GPL");
  88 MODULE_DESCRIPTION("MTD map and partitions for MPC8272ADS boards");