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io.c

/* arch/arm/mach-msm/io.c
 *
 * MSM7K io support
 *
 * Copyright (C) 2007 Google, Inc.
 * Author: Brian Swetland <swetland@google.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>

#include <mach/hardware.h>
#include <asm/io.h>
#include <asm/page.h>
#include <mach/msm_iomap.h>
#include <asm/mach/map.h>

#include <mach/board.h>

#define MSM_DEVICE(name) { \
            .virtual = MSM_##name##_BASE, \
            .pfn = __phys_to_pfn(MSM_##name##_PHYS), \
            .length = MSM_##name##_SIZE, \
            .type = MT_DEVICE_NONSHARED, \
       }

static struct map_desc msm_io_desc[] __initdata = {
      MSM_DEVICE(VIC),
      MSM_DEVICE(CSR),
      MSM_DEVICE(GPT),
      MSM_DEVICE(DMOV),
      MSM_DEVICE(UART1),
      MSM_DEVICE(UART2),
      MSM_DEVICE(UART3),
      MSM_DEVICE(I2C),
      MSM_DEVICE(GPIO1),
      MSM_DEVICE(GPIO2),
      MSM_DEVICE(HSUSB),
      MSM_DEVICE(CLK_CTL),
      MSM_DEVICE(PMDH),
      MSM_DEVICE(EMDH),
      MSM_DEVICE(MDP),
      {
            .virtual =  MSM_SHARED_RAM_BASE,
            .pfn =      __phys_to_pfn(MSM_SHARED_RAM_PHYS),
            .length =   MSM_SHARED_RAM_SIZE,
            .type =     MT_DEVICE,
      },
};

void __init msm_map_common_io(void)
{
      /* Make sure the peripheral register window is closed, since
       * we will use PTE flags (TEX[1]=1,B=0,C=1) to determine which
       * pages are peripheral interface or not.
       */
      asm("mcr p15, 0, %0, c15, c2, 4" : : "r" (0));

      iotable_init(msm_io_desc, ARRAY_SIZE(msm_io_desc));
}

void __iomem *
__msm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
{
      if (mtype == MT_DEVICE) {
            /* The peripherals in the 88000000 - D0000000 range
             * are only accessable by type MT_DEVICE_NONSHARED.
             * Adjust mtype as necessary to make this "just work."
             */
            if ((phys_addr >= 0x88000000) && (phys_addr < 0xD0000000))
                  mtype = MT_DEVICE_NONSHARED;
      }

      return __arm_ioremap(phys_addr, size, mtype);
}

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