release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-omap1/flash.c

   1 /*
   2  * Flash support for OMAP1
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/mtd/mtd.h>
  10 #include <linux/mtd/map.h>
  11
  12 #include <plat/io.h>
  13 #include <plat/tc.h>
  14
  15 void omap1_set_vpp(struct map_info *map, int enable)
  16 {
  17         static int count;
  18         u32 l;
  19
  20         if (enable) {
  21                 if (count++ == 0) {
  22                         l = omap_readl(EMIFS_CONFIG);
  23                         l |= OMAP_EMIFS_CONFIG_WP;
  24                         omap_writel(l, EMIFS_CONFIG);
  25                 }
  26         } else {
  27                 if (count && (--count == 0)) {
  28                         l = omap_readl(EMIFS_CONFIG);
  29                         l &= ~OMAP_EMIFS_CONFIG_WP;
  30                         omap_writel(l, EMIFS_CONFIG);
  31                 }
  32         }
  33 }