release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/plat-iop/io.c

   1 /*
   2  * iop3xx custom ioremap implementation
   3  * Copyright (c) 2006, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  16  * Place - Suite 330, Boston, MA 02111-1307 USA.
  17  *
  18  */
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/io.h>
  22 #include <mach/hardware.h>
  23
  24 void * __iomem __iop3xx_ioremap(unsigned long cookie, size_t size,
  25         unsigned int mtype)
  26 {
  27         void __iomem * retval;
  28
  29         switch (cookie) {
  30         case IOP3XX_PCI_LOWER_IO_PA ... IOP3XX_PCI_UPPER_IO_PA:
  31                 retval = (void *) IOP3XX_PCI_IO_PHYS_TO_VIRT(cookie);
  32                 break;
  33         case IOP3XX_PERIPHERAL_PHYS_BASE ... IOP3XX_PERIPHERAL_UPPER_PA:
  34                 retval = (void *) IOP3XX_PMMR_PHYS_TO_VIRT(cookie);
  35                 break;
  36         default:
  37                 retval = __arm_ioremap_caller(cookie, size, mtype,
  38                                 __builtin_return_address(0));
  39         }
  40
  41         return retval;
  42 }
  43 EXPORT_SYMBOL(__iop3xx_ioremap);
  44
  45 void __iop3xx_iounmap(void __iomem *addr)
  46 {
  47         extern void __iounmap(volatile void __iomem *addr);
  48
  49         switch ((u32) addr) {
  50         case IOP3XX_PCI_LOWER_IO_VA ... IOP3XX_PCI_UPPER_IO_VA:
  51         case IOP3XX_PERIPHERAL_VIRT_BASE ... IOP3XX_PERIPHERAL_UPPER_VA:
  52                 goto skip;
  53         }
  54         __iounmap(addr);
  55
  56 skip:
  57         return;
  58 }
  59 EXPORT_SYMBOL(__iop3xx_iounmap);