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 #include <linux/dma-mapping.h>
  16
  17 #include <plat/omap7xx.h>
  18 #include <plat/omap1510.h>
  19 #include <plat/omap16xx.h>
  20 #include <plat/omap24xx.h>
  21 #include <plat/omap34xx.h>
  22 #include <plat/omap44xx.h>
  23
  24 #define BETWEEN(p,st,sz)        ((p) >= (st) && (p) < ((st) + (sz)))
  25 #define XLATE(p,pst,vst)        ((void __iomem *)((p) - (pst) + (vst)))
  26
  27 static int initialized;
  28
  29 /*
  30  * Intercept ioremap() requests for addresses in our fixed mapping regions.
  31  */
  32 void __iomem *omap_ioremap(unsigned long p, size_t size, unsigned int type)
  33 {
  34
  35         WARN(!initialized, "Do not use ioremap before init_early\n");
  36
  37 #ifdef CONFIG_ARCH_OMAP1
  38         if (cpu_class_is_omap1()) {
  39                 if (BETWEEN(p, OMAP1_IO_PHYS, OMAP1_IO_SIZE))
  40                         return XLATE(p, OMAP1_IO_PHYS, OMAP1_IO_VIRT);
  41         }
  42         if (cpu_is_omap7xx()) {
  43                 if (BETWEEN(p, OMAP7XX_DSP_BASE, OMAP7XX_DSP_SIZE))
  44                         return XLATE(p, OMAP7XX_DSP_BASE, OMAP7XX_DSP_START);
  45
  46                 if (BETWEEN(p, OMAP7XX_DSPREG_BASE, OMAP7XX_DSPREG_SIZE))
  47                         return XLATE(p, OMAP7XX_DSPREG_BASE,
  48                                         OMAP7XX_DSPREG_START);
  49         }
  50         if (cpu_is_omap15xx()) {
  51                 if (BETWEEN(p, OMAP1510_DSP_BASE, OMAP1510_DSP_SIZE))
  52                         return XLATE(p, OMAP1510_DSP_BASE, OMAP1510_DSP_START);
  53
  54                 if (BETWEEN(p, OMAP1510_DSPREG_BASE, OMAP1510_DSPREG_SIZE))
  55                         return XLATE(p, OMAP1510_DSPREG_BASE,
  56                                         OMAP1510_DSPREG_START);
  57         }
  58         if (cpu_is_omap16xx()) {
  59                 if (BETWEEN(p, OMAP16XX_DSP_BASE, OMAP16XX_DSP_SIZE))
  60                         return XLATE(p, OMAP16XX_DSP_BASE, OMAP16XX_DSP_START);
  61
  62                 if (BETWEEN(p, OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_SIZE))
  63                         return XLATE(p, OMAP16XX_DSPREG_BASE,
  64                                         OMAP16XX_DSPREG_START);
  65         }
  66 #endif
  67 #ifdef CONFIG_ARCH_OMAP2
  68         if (cpu_is_omap24xx()) {
  69                 if (BETWEEN(p, L3_24XX_PHYS, L3_24XX_SIZE))
  70                         return XLATE(p, L3_24XX_PHYS, L3_24XX_VIRT);
  71                 if (BETWEEN(p, L4_24XX_PHYS, L4_24XX_SIZE))
  72                         return XLATE(p, L4_24XX_PHYS, L4_24XX_VIRT);
  73         }
  74         if (cpu_is_omap2420()) {
  75                 if (BETWEEN(p, DSP_MEM_2420_PHYS, DSP_MEM_2420_SIZE))
  76                         return XLATE(p, DSP_MEM_2420_PHYS, DSP_MEM_2420_VIRT);
  77                 if (BETWEEN(p, DSP_IPI_2420_PHYS, DSP_IPI_2420_SIZE))
  78                         return XLATE(p, DSP_IPI_2420_PHYS, DSP_IPI_2420_SIZE);
  79                 if (BETWEEN(p, DSP_MMU_2420_PHYS, DSP_MMU_2420_SIZE))
  80                         return XLATE(p, DSP_MMU_2420_PHYS, DSP_MMU_2420_VIRT);
  81         }
  82         if (cpu_is_omap2430()) {
  83                 if (BETWEEN(p, L4_WK_243X_PHYS, L4_WK_243X_SIZE))
  84                         return XLATE(p, L4_WK_243X_PHYS, L4_WK_243X_VIRT);
  85                 if (BETWEEN(p, OMAP243X_GPMC_PHYS, OMAP243X_GPMC_SIZE))
  86                         return XLATE(p, OMAP243X_GPMC_PHYS, OMAP243X_GPMC_VIRT);
  87                 if (BETWEEN(p, OMAP243X_SDRC_PHYS, OMAP243X_SDRC_SIZE))
  88                         return XLATE(p, OMAP243X_SDRC_PHYS, OMAP243X_SDRC_VIRT);
  89                 if (BETWEEN(p, OMAP243X_SMS_PHYS, OMAP243X_SMS_SIZE))
  90                         return XLATE(p, OMAP243X_SMS_PHYS, OMAP243X_SMS_VIRT);
  91         }
  92 #endif
  93 #ifdef CONFIG_ARCH_OMAP3
  94         if (cpu_is_ti816x()) {
  95                 if (BETWEEN(p, L4_34XX_PHYS, L4_34XX_SIZE))
  96                         return XLATE(p, L4_34XX_PHYS, L4_34XX_VIRT);
  97         } else if (cpu_is_omap34xx()) {
  98                 if (BETWEEN(p, L3_34XX_PHYS, L3_34XX_SIZE))
  99                         return XLATE(p, L3_34XX_PHYS, L3_34XX_VIRT);
 100                 if (BETWEEN(p, L4_34XX_PHYS, L4_34XX_SIZE))
 101                         return XLATE(p, L4_34XX_PHYS, L4_34XX_VIRT);
 102                 if (BETWEEN(p, OMAP34XX_GPMC_PHYS, OMAP34XX_GPMC_SIZE))
 103                         return XLATE(p, OMAP34XX_GPMC_PHYS, OMAP34XX_GPMC_VIRT);
 104                 if (BETWEEN(p, OMAP343X_SMS_PHYS, OMAP343X_SMS_SIZE))
 105                         return XLATE(p, OMAP343X_SMS_PHYS, OMAP343X_SMS_VIRT);
 106                 if (BETWEEN(p, OMAP343X_SDRC_PHYS, OMAP343X_SDRC_SIZE))
 107                         return XLATE(p, OMAP343X_SDRC_PHYS, OMAP343X_SDRC_VIRT);
 108                 if (BETWEEN(p, L4_PER_34XX_PHYS, L4_PER_34XX_SIZE))
 109                         return XLATE(p, L4_PER_34XX_PHYS, L4_PER_34XX_VIRT);
 110                 if (BETWEEN(p, L4_EMU_34XX_PHYS, L4_EMU_34XX_SIZE))
 111                         return XLATE(p, L4_EMU_34XX_PHYS, L4_EMU_34XX_VIRT);
 112         }
 113 #endif
 114 #ifdef CONFIG_ARCH_OMAP4
 115         if (cpu_is_omap44xx()) {
 116                 if (BETWEEN(p, L3_44XX_PHYS, L3_44XX_SIZE))
 117                         return XLATE(p, L3_44XX_PHYS, L3_44XX_VIRT);
 118                 if (BETWEEN(p, L4_44XX_PHYS, L4_44XX_SIZE))
 119                         return XLATE(p, L4_44XX_PHYS, L4_44XX_VIRT);
 120                 if (BETWEEN(p, OMAP44XX_GPMC_PHYS, OMAP44XX_GPMC_SIZE))
 121                         return XLATE(p, OMAP44XX_GPMC_PHYS, OMAP44XX_GPMC_VIRT);
 122                 if (BETWEEN(p, OMAP44XX_EMIF1_PHYS, OMAP44XX_EMIF1_SIZE))
 123                         return XLATE(p, OMAP44XX_EMIF1_PHYS,            \
 124                                                         OMAP44XX_EMIF1_VIRT);
 125                 if (BETWEEN(p, OMAP44XX_EMIF2_PHYS, OMAP44XX_EMIF2_SIZE))
 126                         return XLATE(p, OMAP44XX_EMIF2_PHYS,            \
 127                                                         OMAP44XX_EMIF2_VIRT);
 128                 if (BETWEEN(p, OMAP44XX_DMM_PHYS, OMAP44XX_DMM_SIZE))
 129                         return XLATE(p, OMAP44XX_DMM_PHYS, OMAP44XX_DMM_VIRT);
 130                 if (BETWEEN(p, L4_PER_44XX_PHYS, L4_PER_44XX_SIZE))
 131                         return XLATE(p, L4_PER_44XX_PHYS, L4_PER_44XX_VIRT);
 132                 if (BETWEEN(p, L4_EMU_44XX_PHYS, L4_EMU_44XX_SIZE))
 133                         return XLATE(p, L4_EMU_44XX_PHYS, L4_EMU_44XX_VIRT);
 134         }
 135 #endif
 136         return __arm_ioremap_caller(p, size, type, __builtin_return_address(0));
 137 }
 138 EXPORT_SYMBOL(omap_ioremap);
 139
 140 void omap_iounmap(volatile void __iomem *addr)
 141 {
 142         unsigned long virt = (unsigned long)addr;
 143
 144         if (virt >= VMALLOC_START && virt < VMALLOC_END)
 145                 __iounmap(addr);
 146 }
 147 EXPORT_SYMBOL(omap_iounmap);
 148
 149 void __init omap_init_consistent_dma_size(void)
 150 {
 151 #ifdef CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE
 152         init_consistent_dma_size(CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE << 20);
 153 #endif
 154 }
 155
 156 void __init omap_ioremap_init(void)
 157 {
 158         initialized++;
 159 }