drivers/mtd/maps/lasat.c

   1 /*
   2  * Flash device on Lasat 100 and 200 boards
   3  *
   4  * (C) 2002 Brian Murphy <brian@murphy.dk>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * $Id: lasat.c,v 1.7 2004/07/12 21:59:44 dwmw2 Exp $
  11  *
  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 <linux/mtd/mtd.h>
  20 #include <linux/mtd/map.h>
  21 #include <linux/mtd/partitions.h>
  22 #include <linux/config.h>
  23 #include <asm/lasat/lasat.h>
  24
  25 static struct mtd_info *lasat_mtd;
  26
  27 static struct mtd_partition partition_info[LASAT_MTD_LAST];
  28 static char *lasat_mtd_partnames[] = {"Bootloader", "Service", "Normal", "Filesystem", "Config"};
  29
  30 static void lasat_set_vpp(struct map_info *map, int vpp)
  31 {
  32         if (vpp)
  33             *lasat_misc->flash_wp_reg |= 1 << lasat_misc->flash_wp_bit;
  34         else
  35             *lasat_misc->flash_wp_reg &= ~(1 << lasat_misc->flash_wp_bit);
  36 }
  37
  38 static struct map_info lasat_map = {
  39         .name = "LASAT flash",
  40         .bankwidth = 4,
  41         .set_vpp = lasat_set_vpp
  42 };
  43
  44 static int __init init_lasat(void)
  45 {
  46         int i;
  47         /* since we use AMD chips and set_vpp is not implimented
  48          * for these (yet) we still have to permanently enable flash write */
  49         printk(KERN_NOTICE "Unprotecting flash\n");
  50         ENABLE_VPP((&lasat_map));
  51
  52         lasat_map.phys = lasat_flash_partition_start(LASAT_MTD_BOOTLOADER);
  53         lasat_map.virt = (unsigned long)ioremap_nocache(
  54                         lasat_map.phys, lasat_board_info.li_flash_size);
  55         lasat_map.size = lasat_board_info.li_flash_size;
  56
  57         simple_map_init(&lasat_map);
  58
  59         for (i=0; i < LASAT_MTD_LAST; i++)
  60                 partition_info[i].name = lasat_mtd_partnames[i];
  61
  62         lasat_mtd = do_map_probe("cfi_probe", &lasat_map);
  63
  64         if (!lasat_mtd)
  65             lasat_mtd = do_map_probe("jedec_probe", &lasat_map);
  66
  67         if (lasat_mtd) {
  68                 u32 size, offset = 0;
  69
  70                 lasat_mtd->owner = THIS_MODULE;
  71
  72                 for (i=0; i < LASAT_MTD_LAST; i++) {
  73                         size = lasat_flash_partition_size(i);
  74                         partition_info[i].size = size;
  75                         partition_info[i].offset = offset;
  76                         offset += size;
  77                 }
  78
  79                 add_mtd_partitions( lasat_mtd, partition_info, LASAT_MTD_LAST );
  80                 return 0;
  81         }
  82
  83         return -ENXIO;
  84 }
  85
  86 static void __exit cleanup_lasat(void)
  87 {
  88         if (lasat_mtd) {
  89                 del_mtd_partitions(lasat_mtd);
  90                 map_destroy(lasat_mtd);
  91         }
  92         if (lasat_map.virt) {
  93                 lasat_map.virt = 0;
  94         }
  95 }
  96
  97 module_init(init_lasat);
  98 module_exit(cleanup_lasat);
  99
 100 MODULE_LICENSE("GPL");
 101 MODULE_AUTHOR("Brian Murphy <brian@murphy.dk>");
 102 MODULE_DESCRIPTION("Lasat Safepipe/Masquerade MTD map driver");