release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-msm/io.c

   1 /* arch/arm/mach-msm/io.c
   2  *
   3  * MSM7K, QSD io support
   4  *
   5  * Copyright (C) 2007 Google, Inc.
   6  * Copyright (c) 2008-2010, Code Aurora Forum. All rights reserved.
   7  * Author: Brian Swetland <swetland@google.com>
   8  *
   9  * This software is licensed under the terms of the GNU General Public
  10  * License version 2, as published by the Free Software Foundation, and
  11  * may be copied, distributed, and modified under those terms.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/io.h>
  23
  24 #include <mach/hardware.h>
  25 #include <asm/page.h>
  26 #include <mach/msm_iomap.h>
  27 #include <asm/mach/map.h>
  28
  29 #include <mach/board.h>
  30
  31 #define MSM_DEVICE(name) { \
  32                 .virtual = (unsigned long) MSM_##name##_BASE, \
  33                 .pfn = __phys_to_pfn(MSM_##name##_PHYS), \
  34                 .length = MSM_##name##_SIZE, \
  35                 .type = MT_DEVICE_NONSHARED, \
  36          }
  37
  38 #if defined(CONFIG_ARCH_MSM7X00A) || defined(CONFIG_ARCH_MSM7X27) || \
  39         defined(CONFIG_ARCH_MSM7X25)
  40 static struct map_desc msm_io_desc[] __initdata = {
  41         MSM_DEVICE(VIC),
  42         MSM_DEVICE(CSR),
  43         MSM_DEVICE(GPT),
  44         MSM_DEVICE(DMOV),
  45         MSM_DEVICE(GPIO1),
  46         MSM_DEVICE(GPIO2),
  47         MSM_DEVICE(CLK_CTL),
  48 #ifdef CONFIG_MSM_DEBUG_UART
  49         MSM_DEVICE(DEBUG_UART),
  50 #endif
  51 #ifdef CONFIG_ARCH_MSM7X30
  52         MSM_DEVICE(GCC),
  53 #endif
  54         {
  55                 .virtual =  (unsigned long) MSM_SHARED_RAM_BASE,
  56                 .pfn = __phys_to_pfn(MSM_SHARED_RAM_PHYS),
  57                 .length =   MSM_SHARED_RAM_SIZE,
  58                 .type =     MT_DEVICE,
  59         },
  60 };
  61
  62 void __init msm_map_common_io(void)
  63 {
  64         /* Make sure the peripheral register window is closed, since
  65          * we will use PTE flags (TEX[1]=1,B=0,C=1) to determine which
  66          * pages are peripheral interface or not.
  67          */
  68         asm("mcr p15, 0, %0, c15, c2, 4" : : "r" (0));
  69         iotable_init(msm_io_desc, ARRAY_SIZE(msm_io_desc));
  70 }
  71 #endif
  72
  73 #ifdef CONFIG_ARCH_QSD8X50
  74 static struct map_desc qsd8x50_io_desc[] __initdata = {
  75         MSM_DEVICE(VIC),
  76         MSM_DEVICE(CSR),
  77         MSM_DEVICE(TMR),
  78         MSM_DEVICE(DMOV),
  79         MSM_DEVICE(GPIO1),
  80         MSM_DEVICE(GPIO2),
  81         MSM_DEVICE(CLK_CTL),
  82         MSM_DEVICE(SIRC),
  83         MSM_DEVICE(SCPLL),
  84         MSM_DEVICE(AD5),
  85         MSM_DEVICE(MDC),
  86 #ifdef CONFIG_MSM_DEBUG_UART
  87         MSM_DEVICE(DEBUG_UART),
  88 #endif
  89         {
  90                 .virtual =  (unsigned long) MSM_SHARED_RAM_BASE,
  91                 .pfn = __phys_to_pfn(MSM_SHARED_RAM_PHYS),
  92                 .length =   MSM_SHARED_RAM_SIZE,
  93                 .type =     MT_DEVICE,
  94         },
  95 };
  96
  97 void __init msm_map_qsd8x50_io(void)
  98 {
  99         iotable_init(qsd8x50_io_desc, ARRAY_SIZE(qsd8x50_io_desc));
 100 }
 101 #endif /* CONFIG_ARCH_QSD8X50 */
 102
 103 #ifdef CONFIG_ARCH_MSM7X30
 104 static struct map_desc msm7x30_io_desc[] __initdata = {
 105         MSM_DEVICE(VIC),
 106         MSM_DEVICE(CSR),
 107         MSM_DEVICE(TMR),
 108         MSM_DEVICE(DMOV),
 109         MSM_DEVICE(GPIO1),
 110         MSM_DEVICE(GPIO2),
 111         MSM_DEVICE(CLK_CTL),
 112         MSM_DEVICE(CLK_CTL_SH2),
 113         MSM_DEVICE(AD5),
 114         MSM_DEVICE(MDC),
 115         MSM_DEVICE(ACC),
 116         MSM_DEVICE(SAW),
 117         MSM_DEVICE(GCC),
 118         MSM_DEVICE(TCSR),
 119 #ifdef CONFIG_MSM_DEBUG_UART
 120         MSM_DEVICE(DEBUG_UART),
 121 #endif
 122         {
 123                 .virtual =  (unsigned long) MSM_SHARED_RAM_BASE,
 124                 .pfn = __phys_to_pfn(MSM_SHARED_RAM_PHYS),
 125                 .length =   MSM_SHARED_RAM_SIZE,
 126                 .type =     MT_DEVICE,
 127         },
 128 };
 129
 130 void __init msm_map_msm7x30_io(void)
 131 {
 132         iotable_init(msm7x30_io_desc, ARRAY_SIZE(msm7x30_io_desc));
 133 }
 134 #endif /* CONFIG_ARCH_MSM7X30 */
 135
 136 void __iomem *
 137 __msm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
 138 {
 139         if (mtype == MT_DEVICE) {
 140                 /* The peripherals in the 88000000 - D0000000 range
 141                  * are only accessable by type MT_DEVICE_NONSHARED.
 142                  * Adjust mtype as necessary to make this "just work."
 143                  */
 144                 if ((phys_addr >= 0x88000000) && (phys_addr < 0xD0000000))
 145                         mtype = MT_DEVICE_NONSHARED;
 146         }
 147
 148         return __arm_ioremap_caller(phys_addr, size, mtype,
 149                 __builtin_return_address(0));
 150 }