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) 2008-2011, 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/bug.h>
  22 #include <linux/init.h>
  23 #include <linux/io.h>
  24 #include <linux/export.h>
  25
  26 #include <mach/hardware.h>
  27 #include <asm/page.h>
  28 #include <mach/msm_iomap.h>
  29 #include <asm/mach/map.h>
  30
  31 #include "common.h"
  32
  33 #define MSM_CHIP_DEVICE_TYPE(name, chip, mem_type) {                          \
  34                 .virtual = (unsigned long) MSM_##name##_BASE, \
  35                 .pfn = __phys_to_pfn(chip##_##name##_PHYS), \
  36                 .length = chip##_##name##_SIZE, \
  37                 .type = mem_type, \
  38          }
  39
  40 #define MSM_DEVICE_TYPE(name, mem_type) \
  41                 MSM_CHIP_DEVICE_TYPE(name, MSM, mem_type)
  42 #define MSM_CHIP_DEVICE(name, chip) \
  43                 MSM_CHIP_DEVICE_TYPE(name, chip, MT_DEVICE)
  44 #define MSM_DEVICE(name) MSM_CHIP_DEVICE(name, MSM)
  45
  46 #if defined(CONFIG_ARCH_MSM7X00A)
  47 static struct map_desc msm_io_desc[] __initdata = {
  48         MSM_DEVICE_TYPE(VIC, MT_DEVICE_NONSHARED),
  49         MSM_CHIP_DEVICE_TYPE(CSR, MSM7X00, MT_DEVICE_NONSHARED),
  50         MSM_DEVICE_TYPE(DMOV, MT_DEVICE_NONSHARED),
  51         MSM_CHIP_DEVICE_TYPE(GPIO1, MSM7X00, MT_DEVICE_NONSHARED),
  52         MSM_CHIP_DEVICE_TYPE(GPIO2, MSM7X00, MT_DEVICE_NONSHARED),
  53         MSM_DEVICE_TYPE(CLK_CTL, MT_DEVICE_NONSHARED),
  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 #if defined(CONFIG_DEBUG_MSM_UART1) || defined(CONFIG_DEBUG_MSM_UART2) || \
  61                 defined(CONFIG_DEBUG_MSM_UART3)
  62         {
  63                 /* Must be last: virtual and pfn filled in by debug_ll_addr() */
  64                 .length = SZ_4K,
  65                 .type = MT_DEVICE_NONSHARED,
  66         }
  67 #endif
  68 };
  69
  70 void __init msm_map_common_io(void)
  71 {
  72         size_t size = ARRAY_SIZE(msm_io_desc);
  73
  74         /* Make sure the peripheral register window is closed, since
  75          * we will use PTE flags (TEX[1]=1,B=0,C=1) to determine which
  76          * pages are peripheral interface or not.
  77          */
  78         asm("mcr p15, 0, %0, c15, c2, 4" : : "r" (0));
  79 #if defined(CONFIG_DEBUG_MSM_UART1) || defined(CONFIG_DEBUG_MSM_UART2) || \
  80                 defined(CONFIG_DEBUG_MSM_UART3)
  81 #ifdef CONFIG_MMU
  82         debug_ll_addr(&msm_io_desc[size - 1].pfn,
  83                       &msm_io_desc[size - 1].virtual);
  84 #endif
  85         msm_io_desc[size - 1].pfn = __phys_to_pfn(msm_io_desc[size - 1].pfn);
  86 #endif
  87         iotable_init(msm_io_desc, size);
  88 }
  89 #endif
  90
  91 #ifdef CONFIG_ARCH_QSD8X50
  92 static struct map_desc qsd8x50_io_desc[] __initdata = {
  93         MSM_DEVICE(VIC),
  94         MSM_CHIP_DEVICE(CSR, QSD8X50),
  95         MSM_DEVICE(DMOV),
  96         MSM_CHIP_DEVICE(GPIO1, QSD8X50),
  97         MSM_CHIP_DEVICE(GPIO2, QSD8X50),
  98         MSM_DEVICE(CLK_CTL),
  99         MSM_DEVICE(SIRC),
 100         MSM_DEVICE(SCPLL),
 101         MSM_DEVICE(AD5),
 102         MSM_DEVICE(MDC),
 103         {
 104                 .virtual =  (unsigned long) MSM_SHARED_RAM_BASE,
 105                 .pfn = __phys_to_pfn(MSM_SHARED_RAM_PHYS),
 106                 .length =   MSM_SHARED_RAM_SIZE,
 107                 .type =     MT_DEVICE,
 108         },
 109 };
 110
 111 void __init msm_map_qsd8x50_io(void)
 112 {
 113         debug_ll_io_init();
 114         iotable_init(qsd8x50_io_desc, ARRAY_SIZE(qsd8x50_io_desc));
 115 }
 116 #endif /* CONFIG_ARCH_QSD8X50 */
 117
 118 #ifdef CONFIG_ARCH_MSM7X30
 119 static struct map_desc msm7x30_io_desc[] __initdata = {
 120         MSM_DEVICE(VIC),
 121         MSM_CHIP_DEVICE(CSR, MSM7X30),
 122         MSM_DEVICE(DMOV),
 123         MSM_CHIP_DEVICE(GPIO1, MSM7X30),
 124         MSM_CHIP_DEVICE(GPIO2, MSM7X30),
 125         MSM_DEVICE(CLK_CTL),
 126         MSM_DEVICE(CLK_CTL_SH2),
 127         MSM_DEVICE(AD5),
 128         MSM_DEVICE(MDC),
 129         MSM_DEVICE(ACC),
 130         MSM_DEVICE(SAW),
 131         MSM_DEVICE(GCC),
 132         MSM_DEVICE(TCSR),
 133         {
 134                 .virtual =  (unsigned long) MSM_SHARED_RAM_BASE,
 135                 .pfn = __phys_to_pfn(MSM_SHARED_RAM_PHYS),
 136                 .length =   MSM_SHARED_RAM_SIZE,
 137                 .type =     MT_DEVICE,
 138         },
 139 };
 140
 141 void __init msm_map_msm7x30_io(void)
 142 {
 143         debug_ll_io_init();
 144         iotable_init(msm7x30_io_desc, ARRAY_SIZE(msm7x30_io_desc));
 145 }
 146 #endif /* CONFIG_ARCH_MSM7X30 */
 147
 148 #ifdef CONFIG_ARCH_MSM7X00A
 149 void __iomem *__msm_ioremap_caller(phys_addr_t phys_addr, size_t size,
 150                                    unsigned int mtype, void *caller)
 151 {
 152         if (mtype == MT_DEVICE) {
 153                 /* The peripherals in the 88000000 - D0000000 range
 154                  * are only accessible by type MT_DEVICE_NONSHARED.
 155                  * Adjust mtype as necessary to make this "just work."
 156                  */
 157                 if ((phys_addr >= 0x88000000) && (phys_addr < 0xD0000000))
 158                         mtype = MT_DEVICE_NONSHARED;
 159         }
 160
 161         return __arm_ioremap_caller(phys_addr, size, mtype, caller);
 162 }
 163 #endif