arch/arm/plat-omap/io.c

   1 /*
   2  * Common io.c file
   3  * This file is created by Russell King <rmk+kernel@arm.linux.org.uk>
   4  *
   5  * Copyright (C) 2009 Texas Instruments
   6  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 #include <linux/module.h>
  13 #include <linux/io.h>
  14 #include <linux/mm.h>
  15
  16 #include <plat/omap7xx.h>
  17 #include <plat/omap1510.h>
  18 #include <plat/omap16xx.h>
  19 #include <plat/omap24xx.h>
  20 #include <plat/omap34xx.h>
  21 #include <plat/omap44xx.h>
  22
  23 #define BETWEEN(p,st,sz)        ((p) >= (st) && (p) < ((st) + (sz)))
  24 #define XLATE(p,pst,vst)        ((void __iomem *)((p) - (pst) + (vst)))
  25
  26 static int initialized;
  27
  28 /*
  29  * Intercept ioremap() requests for addresses in our fixed mapping regions.
  30  */
  31 void __iomem *omap_ioremap(unsigned long p, size_t size, unsigned int type)
  32 {
  33
  34         WARN(!initialized, "Do not use ioremap before init_early\n");
  35
  36 #ifdef CONFIG_ARCH_OMAP1
  37         if (cpu_class_is_omap1()) {
  38                 if (BETWEEN(p, OMAP1_IO_PHYS, OMAP1_IO_SIZE))
  39                         return XLATE(p, OMAP1_IO_PHYS, OMAP1_IO_VIRT);
  40         }
  41         if (cpu_is_omap7xx()) {
  42                 if (BETWEEN(p, OMAP7XX_DSP_BASE, OMAP7XX_DSP_SIZE))
  43                         return XLATE(p, OMAP7XX_DSP_BASE, OMAP7XX_DSP_START);
  44
  45                 if (BETWEEN(p, OMAP7XX_DSPREG_BASE, OMAP7XX_DSPREG_SIZE))
  46                         return XLATE(p, OMAP7XX_DSPREG_BASE,
  47                                         OMAP7XX_DSPREG_START);
  48         }
  49         if (cpu_is_omap15xx()) {
  50                 if (BETWEEN(p, OMAP1510_DSP_BASE, OMAP1510_DSP_SIZE))
  51                         return XLATE(p, OMAP1510_DSP_BASE, OMAP1510_DSP_START);
  52
  53                 if (BETWEEN(p, OMAP1510_DSPREG_BASE, OMAP1510_DSPREG_SIZE))
  54                         return XLATE(p, OMAP1510_DSPREG_BASE,
  55                                         OMAP1510_DSPREG_START);
  56         }
  57         if (cpu_is_omap16xx()) {
  58                 if (BETWEEN(p, OMAP16XX_DSP_BASE, OMAP16XX_DSP_SIZE))
  59                         return XLATE(p, OMAP16XX_DSP_BASE, OMAP16XX_DSP_START);
  60
  61                 if (BETWEEN(p, OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_SIZE))
  62                         return XLATE(p, OMAP16XX_DSPREG_BASE,
  63                                         OMAP16XX_DSPREG_START);
  64         }
  65 #endif
  66 #ifdef CONFIG_ARCH_OMAP2
  67         if (cpu_is_omap24xx()) {
  68                 if (BETWEEN(p, L3_24XX_PHYS, L3_24XX_SIZE))
  69                         return XLATE(p, L3_24XX_PHYS, L3_24XX_VIRT);
  70                 if (BETWEEN(p, L4_24XX_PHYS, L4_24XX_SIZE))
  71                         return XLATE(p, L4_24XX_PHYS, L4_24XX_VIRT);
  72         }
  73         if (cpu_is_omap2420()) {
  74                 if (BETWEEN(p, DSP_MEM_2420_PHYS, DSP_MEM_2420_SIZE))
  75                         return XLATE(p, DSP_MEM_2420_PHYS, DSP_MEM_2420_VIRT);
  76                 if (BETWEEN(p, DSP_IPI_2420_PHYS, DSP_IPI_2420_SIZE))
  77                         return XLATE(p, DSP_IPI_2420_PHYS, DSP_IPI_2420_SIZE);
  78                 if (BETWEEN(p, DSP_MMU_2420_PHYS, DSP_MMU_2420_SIZE))
  79                         return XLATE(p, DSP_MMU_2420_PHYS, DSP_MMU_2420_VIRT);
  80         }
  81         if (cpu_is_omap2430()) {
  82                 if (BETWEEN(p, L4_WK_243X_PHYS, L4_WK_243X_SIZE))
  83                         return XLATE(p, L4_WK_243X_PHYS, L4_WK_243X_VIRT);
  84                 if (BETWEEN(p, OMAP243X_GPMC_PHYS, OMAP243X_GPMC_SIZE))
  85                         return XLATE(p, OMAP243X_GPMC_PHYS, OMAP243X_GPMC_VIRT);
  86                 if (BETWEEN(p, OMAP243X_SDRC_PHYS, OMAP243X_SDRC_SIZE))
  87                         return XLATE(p, OMAP243X_SDRC_PHYS, OMAP243X_SDRC_VIRT);
  88                 if (BETWEEN(p, OMAP243X_SMS_PHYS, OMAP243X_SMS_SIZE))
  89                         return XLATE(p, OMAP243X_SMS_PHYS, OMAP243X_SMS_VIRT);
  90         }
  91 #endif
  92 #ifdef CONFIG_ARCH_OMAP3
  93         if (cpu_is_ti816x()) {
  94                 if (BETWEEN(p, L4_34XX_PHYS, L4_34XX_SIZE))
  95                         return XLATE(p, L4_34XX_PHYS, L4_34XX_VIRT);
  96         } else if (cpu_is_omap34xx()) {
  97                 if (BETWEEN(p, L3_34XX_PHYS, L3_34XX_SIZE))
  98                         return XLATE(p, L3_34XX_PHYS, L3_34XX_VIRT);
  99                 if (BETWEEN(p, L4_34XX_PHYS, L4_34XX_SIZE))
 100                         return XLATE(p, L4_34XX_PHYS, L4_34XX_VIRT);
 101                 if (BETWEEN(p, OMAP34XX_GPMC_PHYS, OMAP34XX_GPMC_SIZE))
 102                         return XLATE(p, OMAP34XX_GPMC_PHYS, OMAP34XX_GPMC_VIRT);
 103                 if (BETWEEN(p, OMAP343X_SMS_PHYS, OMAP343X_SMS_SIZE))
 104                         return XLATE(p, OMAP343X_SMS_PHYS, OMAP343X_SMS_VIRT);
 105                 if (BETWEEN(p, OMAP343X_SDRC_PHYS, OMAP343X_SDRC_SIZE))
 106                         return XLATE(p, OMAP343X_SDRC_PHYS, OMAP343X_SDRC_VIRT);
 107                 if (BETWEEN(p, L4_PER_34XX_PHYS, L4_PER_34XX_SIZE))
 108                         return XLATE(p, L4_PER_34XX_PHYS, L4_PER_34XX_VIRT);
 109                 if (BETWEEN(p, L4_EMU_34XX_PHYS, L4_EMU_34XX_SIZE))
 110                         return XLATE(p, L4_EMU_34XX_PHYS, L4_EMU_34XX_VIRT);
 111         }
 112 #endif
 113 #ifdef CONFIG_ARCH_OMAP4
 114         if (cpu_is_omap44xx()) {
 115                 if (BETWEEN(p, L3_44XX_PHYS, L3_44XX_SIZE))
 116                         return XLATE(p, L3_44XX_PHYS, L3_44XX_VIRT);
 117                 if (BETWEEN(p, L4_44XX_PHYS, L4_44XX_SIZE))
 118                         return XLATE(p, L4_44XX_PHYS, L4_44XX_VIRT);
 119                 if (BETWEEN(p, OMAP44XX_GPMC_PHYS, OMAP44XX_GPMC_SIZE))
 120                         return XLATE(p, OMAP44XX_GPMC_PHYS, OMAP44XX_GPMC_VIRT);
 121                 if (BETWEEN(p, OMAP44XX_EMIF1_PHYS, OMAP44XX_EMIF1_SIZE))
 122                         return XLATE(p, OMAP44XX_EMIF1_PHYS,            \
 123                                                         OMAP44XX_EMIF1_VIRT);
 124                 if (BETWEEN(p, OMAP44XX_EMIF2_PHYS, OMAP44XX_EMIF2_SIZE))
 125                         return XLATE(p, OMAP44XX_EMIF2_PHYS,            \
 126                                                         OMAP44XX_EMIF2_VIRT);
 127                 if (BETWEEN(p, OMAP44XX_DMM_PHYS, OMAP44XX_DMM_SIZE))
 128                         return XLATE(p, OMAP44XX_DMM_PHYS, OMAP44XX_DMM_VIRT);
 129                 if (BETWEEN(p, L4_PER_44XX_PHYS, L4_PER_44XX_SIZE))
 130                         return XLATE(p, L4_PER_44XX_PHYS, L4_PER_44XX_VIRT);
 131                 if (BETWEEN(p, L4_EMU_44XX_PHYS, L4_EMU_44XX_SIZE))
 132                         return XLATE(p, L4_EMU_44XX_PHYS, L4_EMU_44XX_VIRT);
 133         }
 134 #endif
 135         return __arm_ioremap_caller(p, size, type, __builtin_return_address(0));
 136 }
 137 EXPORT_SYMBOL(omap_ioremap);
 138
 139 void omap_iounmap(volatile void __iomem *addr)
 140 {
 141         unsigned long virt = (unsigned long)addr;
 142
 143         if (virt >= VMALLOC_START && virt < VMALLOC_END)
 144                 __iounmap(addr);
 145 }
 146 EXPORT_SYMBOL(omap_iounmap);
 147
 148 void __init omap_ioremap_init(void)
 149 {
 150         initialized++;
 151 }