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