arch/arm/mach-iop13xx/io.c

   1 /*
   2  * iop13xx custom ioremap implementation
   3  * Copyright (c) 2005-2006, 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 #include "pci.h"
  25
  26 void * __iomem __iop13xx_io(unsigned long io_addr)
  27 {
  28         void __iomem * io_virt;
  29
  30         switch (io_addr) {
  31         case IOP13XX_PCIE_LOWER_IO_PA ... IOP13XX_PCIE_UPPER_IO_PA:
  32                 io_virt = (void *) IOP13XX_PCIE_IO_PHYS_TO_VIRT(io_addr);
  33                 break;
  34         case IOP13XX_PCIX_LOWER_IO_PA ... IOP13XX_PCIX_UPPER_IO_PA:
  35                 io_virt = (void *) IOP13XX_PCIX_IO_PHYS_TO_VIRT(io_addr);
  36                 break;
  37         default:
  38                 BUG();
  39         }
  40
  41         return io_virt;
  42 }
  43 EXPORT_SYMBOL(__iop13xx_io);
  44
  45 static void __iomem *__iop13xx_ioremap_caller(unsigned long cookie,
  46         size_t size, unsigned int mtype, void *caller)
  47 {
  48         void __iomem * retval;
  49
  50         switch (cookie) {
  51         case IOP13XX_PCIX_LOWER_MEM_RA ... IOP13XX_PCIX_UPPER_MEM_RA:
  52                 if (unlikely(!iop13xx_atux_mem_base))
  53                         retval = NULL;
  54                 else
  55                         retval = (void *)(iop13xx_atux_mem_base +
  56                                  (cookie - IOP13XX_PCIX_LOWER_MEM_RA));
  57                 break;
  58         case IOP13XX_PCIE_LOWER_MEM_RA ... IOP13XX_PCIE_UPPER_MEM_RA:
  59                 if (unlikely(!iop13xx_atue_mem_base))
  60                         retval = NULL;
  61                 else
  62                         retval = (void *)(iop13xx_atue_mem_base +
  63                                  (cookie - IOP13XX_PCIE_LOWER_MEM_RA));
  64                 break;
  65         case IOP13XX_PBI_LOWER_MEM_RA ... IOP13XX_PBI_UPPER_MEM_RA:
  66                 retval = __arm_ioremap_caller(IOP13XX_PBI_LOWER_MEM_PA +
  67                                        (cookie - IOP13XX_PBI_LOWER_MEM_RA),
  68                                        size, mtype, __builtin_return_address(0));
  69                 break;
  70         case IOP13XX_PCIE_LOWER_IO_PA ... IOP13XX_PCIE_UPPER_IO_PA:
  71                 retval = (void *) IOP13XX_PCIE_IO_PHYS_TO_VIRT(cookie);
  72                 break;
  73         case IOP13XX_PCIX_LOWER_IO_PA ... IOP13XX_PCIX_UPPER_IO_PA:
  74                 retval = (void *) IOP13XX_PCIX_IO_PHYS_TO_VIRT(cookie);
  75                 break;
  76         case IOP13XX_PMMR_PHYS_MEM_BASE ... IOP13XX_PMMR_UPPER_MEM_PA:
  77                 retval = (void *) IOP13XX_PMMR_PHYS_TO_VIRT(cookie);
  78                 break;
  79         default:
  80                 retval = __arm_ioremap_caller(cookie, size, mtype,
  81                                 caller);
  82         }
  83
  84         return retval;
  85 }
  86
  87 static void __iop13xx_iounmap(volatile void __iomem *addr)
  88 {
  89         if (iop13xx_atue_mem_base)
  90                 if (addr >= (void __iomem *) iop13xx_atue_mem_base &&
  91                     addr < (void __iomem *) (iop13xx_atue_mem_base +
  92                                              iop13xx_atue_mem_size))
  93                     goto skip;
  94
  95         if (iop13xx_atux_mem_base)
  96                 if (addr >= (void __iomem *) iop13xx_atux_mem_base &&
  97                     addr < (void __iomem *) (iop13xx_atux_mem_base +
  98                                              iop13xx_atux_mem_size))
  99                     goto skip;
 100
 101         switch ((u32) addr) {
 102         case IOP13XX_PCIE_LOWER_IO_VA ... IOP13XX_PCIE_UPPER_IO_VA:
 103         case IOP13XX_PCIX_LOWER_IO_VA ... IOP13XX_PCIX_UPPER_IO_VA:
 104         case IOP13XX_PMMR_VIRT_MEM_BASE ... IOP13XX_PMMR_UPPER_MEM_VA:
 105                 goto skip;
 106         }
 107         __iounmap(addr);
 108
 109 skip:
 110         return;
 111 }
 112
 113 void __init iop13xx_init_early(void)
 114 {
 115         arch_ioremap_caller = __iop13xx_ioremap_caller;
 116         arch_iounmap = __iop13xx_iounmap;
 117 }