release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-imx/mm-imx21.c

   1 /*
   2  * arch/arm/mach-imx/mm-imx21.c
   3  *
   4  * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
   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
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  18  * MA 02110-1301, USA.
  19  */
  20
  21 #include <linux/mm.h>
  22 #include <linux/init.h>
  23 #include <mach/hardware.h>
  24 #include <mach/common.h>
  25 #include <asm/pgtable.h>
  26 #include <asm/mach/map.h>
  27
  28 /* MX21 memory map definition */
  29 static struct map_desc imx21_io_desc[] __initdata = {
  30         /*
  31          * this fixed mapping covers:
  32          * - AIPI1
  33          * - AIPI2
  34          * - AITC
  35          * - ROM Patch
  36          * - and some reserved space
  37          */
  38         {
  39                 .virtual = MX21_AIPI_BASE_ADDR_VIRT,
  40                 .pfn = __phys_to_pfn(MX21_AIPI_BASE_ADDR),
  41                 .length = MX21_AIPI_SIZE,
  42                 .type = MT_DEVICE
  43         },
  44         /*
  45          * this fixed mapping covers:
  46          * - CSI
  47          * - ATA
  48          */
  49         {
  50                 .virtual = MX21_SAHB1_BASE_ADDR_VIRT,
  51                 .pfn = __phys_to_pfn(MX21_SAHB1_BASE_ADDR),
  52                 .length = MX21_SAHB1_SIZE,
  53                 .type = MT_DEVICE
  54         },
  55         /*
  56          * this fixed mapping covers:
  57          * - EMI
  58          */
  59         {
  60                 .virtual = MX21_X_MEMC_BASE_ADDR_VIRT,
  61                 .pfn = __phys_to_pfn(MX21_X_MEMC_BASE_ADDR),
  62                 .length = MX21_X_MEMC_SIZE,
  63                 .type = MT_DEVICE
  64         },
  65 };
  66
  67 /*
  68  * Initialize the memory map. It is called during the
  69  * system startup to create static physical to virtual
  70  * memory map for the IO modules.
  71  */
  72 void __init mx21_map_io(void)
  73 {
  74         mxc_set_cpu_type(MXC_CPU_MX21);
  75         mxc_arch_reset_init(MX21_IO_ADDRESS(MX21_WDOG_BASE_ADDR));
  76
  77         iotable_init(imx21_io_desc, ARRAY_SIZE(imx21_io_desc));
  78 }
  79
  80 int imx21_register_gpios(void);
  81
  82 void __init mx21_init_irq(void)
  83 {
  84         mxc_init_irq(MX21_IO_ADDRESS(MX21_AVIC_BASE_ADDR));
  85         imx21_register_gpios();
  86 }