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 /*
  27  * Intercept ioremap() requests for addresses in our fixed mapping regions.
  28  */
  29 void __iomem *omap_ioremap(unsigned long p, size_t size, unsigned int type)
  30 {
  31 #ifdef CONFIG_ARCH_OMAP1
  32         if (cpu_class_is_omap1()) {
  33                 if (BETWEEN(p, OMAP1_IO_PHYS, OMAP1_IO_SIZE))
  34                         return XLATE(p, OMAP1_IO_PHYS, OMAP1_IO_VIRT);
  35         }
  36         if (cpu_is_omap7xx()) {
  37                 if (BETWEEN(p, OMAP7XX_DSP_BASE, OMAP7XX_DSP_SIZE))
  38                         return XLATE(p, OMAP7XX_DSP_BASE, OMAP7XX_DSP_START);
  39
  40                 if (BETWEEN(p, OMAP7XX_DSPREG_BASE, OMAP7XX_DSPREG_SIZE))
  41                         return XLATE(p, OMAP7XX_DSPREG_BASE,
  42                                         OMAP7XX_DSPREG_START);
  43         }
  44         if (cpu_is_omap15xx()) {
  45                 if (BETWEEN(p, OMAP1510_DSP_BASE, OMAP1510_DSP_SIZE))
  46                         return XLATE(p, OMAP1510_DSP_BASE, OMAP1510_DSP_START);
  47
  48                 if (BETWEEN(p, OMAP1510_DSPREG_BASE, OMAP1510_DSPREG_SIZE))
  49                         return XLATE(p, OMAP1510_DSPREG_BASE,
  50                                         OMAP1510_DSPREG_START);
  51         }
  52         if (cpu_is_omap16xx()) {
  53                 if (BETWEEN(p, OMAP16XX_DSP_BASE, OMAP16XX_DSP_SIZE))
  54                         return XLATE(p, OMAP16XX_DSP_BASE, OMAP16XX_DSP_START);
  55
  56                 if (BETWEEN(p, OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_SIZE))
  57                         return XLATE(p, OMAP16XX_DSPREG_BASE,
  58                                         OMAP16XX_DSPREG_START);
  59         }
  60 #endif
  61 #ifdef CONFIG_ARCH_OMAP2
  62         if (cpu_is_omap24xx()) {
  63                 if (BETWEEN(p, L3_24XX_PHYS, L3_24XX_SIZE))
  64                         return XLATE(p, L3_24XX_PHYS, L3_24XX_VIRT);
  65                 if (BETWEEN(p, L4_24XX_PHYS, L4_24XX_SIZE))
  66                         return XLATE(p, L4_24XX_PHYS, L4_24XX_VIRT);
  67         }
  68         if (cpu_is_omap2420()) {
  69                 if (BETWEEN(p, DSP_MEM_24XX_PHYS, DSP_MEM_24XX_SIZE))
  70                         return XLATE(p, DSP_MEM_24XX_PHYS, DSP_MEM_24XX_VIRT);
  71                 if (BETWEEN(p, DSP_IPI_24XX_PHYS, DSP_IPI_24XX_SIZE))
  72                         return XLATE(p, DSP_IPI_24XX_PHYS, DSP_IPI_24XX_SIZE);
  73                 if (BETWEEN(p, DSP_MMU_24XX_PHYS, DSP_MMU_24XX_SIZE))
  74                         return XLATE(p, DSP_MMU_24XX_PHYS, DSP_MMU_24XX_VIRT);
  75         }
  76         if (cpu_is_omap2430()) {
  77                 if (BETWEEN(p, L4_WK_243X_PHYS, L4_WK_243X_SIZE))
  78                         return XLATE(p, L4_WK_243X_PHYS, L4_WK_243X_VIRT);
  79                 if (BETWEEN(p, OMAP243X_GPMC_PHYS, OMAP243X_GPMC_SIZE))
  80                         return XLATE(p, OMAP243X_GPMC_PHYS, OMAP243X_GPMC_VIRT);
  81                 if (BETWEEN(p, OMAP243X_SDRC_PHYS, OMAP243X_SDRC_SIZE))
  82                         return XLATE(p, OMAP243X_SDRC_PHYS, OMAP243X_SDRC_VIRT);
  83                 if (BETWEEN(p, OMAP243X_SMS_PHYS, OMAP243X_SMS_SIZE))
  84                         return XLATE(p, OMAP243X_SMS_PHYS, OMAP243X_SMS_VIRT);
  85         }
  86 #endif
  87 #ifdef CONFIG_ARCH_OMAP3
  88         if (cpu_is_omap34xx()) {
  89                 if (BETWEEN(p, L3_34XX_PHYS, L3_34XX_SIZE))
  90                         return XLATE(p, L3_34XX_PHYS, L3_34XX_VIRT);
  91                 if (BETWEEN(p, L4_34XX_PHYS, L4_34XX_SIZE))
  92                         return XLATE(p, L4_34XX_PHYS, L4_34XX_VIRT);
  93                 if (BETWEEN(p, L4_WK_34XX_PHYS, L4_WK_34XX_SIZE))
  94                         return XLATE(p, L4_WK_34XX_PHYS, L4_WK_34XX_VIRT);
  95                 if (BETWEEN(p, OMAP34XX_GPMC_PHYS, OMAP34XX_GPMC_SIZE))
  96                         return XLATE(p, OMAP34XX_GPMC_PHYS, OMAP34XX_GPMC_VIRT);
  97                 if (BETWEEN(p, OMAP343X_SMS_PHYS, OMAP343X_SMS_SIZE))
  98                         return XLATE(p, OMAP343X_SMS_PHYS, OMAP343X_SMS_VIRT);
  99                 if (BETWEEN(p, OMAP343X_SDRC_PHYS, OMAP343X_SDRC_SIZE))
 100                         return XLATE(p, OMAP343X_SDRC_PHYS, OMAP343X_SDRC_VIRT);
 101                 if (BETWEEN(p, L4_PER_34XX_PHYS, L4_PER_34XX_SIZE))
 102                         return XLATE(p, L4_PER_34XX_PHYS, L4_PER_34XX_VIRT);
 103                 if (BETWEEN(p, L4_EMU_34XX_PHYS, L4_EMU_34XX_SIZE))
 104                         return XLATE(p, L4_EMU_34XX_PHYS, L4_EMU_34XX_VIRT);
 105         }
 106 #endif
 107 #ifdef CONFIG_ARCH_OMAP4
 108         if (cpu_is_omap44xx()) {
 109                 if (BETWEEN(p, L3_44XX_PHYS, L3_44XX_SIZE))
 110                         return XLATE(p, L3_44XX_PHYS, L3_44XX_VIRT);
 111                 if (BETWEEN(p, L4_44XX_PHYS, L4_44XX_SIZE))
 112                         return XLATE(p, L4_44XX_PHYS, L4_44XX_VIRT);
 113                 if (BETWEEN(p, L4_WK_44XX_PHYS, L4_WK_44XX_SIZE))
 114                         return XLATE(p, L4_WK_44XX_PHYS, L4_WK_44XX_VIRT);
 115                 if (BETWEEN(p, OMAP44XX_GPMC_PHYS, OMAP44XX_GPMC_SIZE))
 116                         return XLATE(p, OMAP44XX_GPMC_PHYS, OMAP44XX_GPMC_VIRT);
 117                 if (BETWEEN(p, OMAP44XX_EMIF1_PHYS, OMAP44XX_EMIF1_SIZE))
 118                         return XLATE(p, OMAP44XX_EMIF1_PHYS,            \
 119                                                         OMAP44XX_EMIF1_VIRT);
 120                 if (BETWEEN(p, OMAP44XX_EMIF2_PHYS, OMAP44XX_EMIF2_SIZE))
 121                         return XLATE(p, OMAP44XX_EMIF2_PHYS,            \
 122                                                         OMAP44XX_EMIF2_VIRT);
 123                 if (BETWEEN(p, OMAP44XX_DMM_PHYS, OMAP44XX_DMM_SIZE))
 124                         return XLATE(p, OMAP44XX_DMM_PHYS, OMAP44XX_DMM_VIRT);
 125                 if (BETWEEN(p, L4_PER_44XX_PHYS, L4_PER_44XX_SIZE))
 126                         return XLATE(p, L4_PER_44XX_PHYS, L4_PER_44XX_VIRT);
 127                 if (BETWEEN(p, L4_EMU_44XX_PHYS, L4_EMU_44XX_SIZE))
 128                         return XLATE(p, L4_EMU_44XX_PHYS, L4_EMU_44XX_VIRT);
 129         }
 130 #endif
 131         return __arm_ioremap(p, size, type);
 132 }
 133 EXPORT_SYMBOL(omap_ioremap);
 134
 135 void omap_iounmap(volatile void __iomem *addr)
 136 {
 137         unsigned long virt = (unsigned long)addr;
 138
 139         if (virt >= VMALLOC_START && virt < VMALLOC_END)
 140                 __iounmap(addr);
 141 }
 142 EXPORT_SYMBOL(omap_iounmap);
 143
 144 /*
 145  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
 146  */
 147
 148 u8 omap_readb(u32 pa)
 149 {
 150         if (cpu_class_is_omap1())
 151                 return __raw_readb(OMAP1_IO_ADDRESS(pa));
 152         else
 153                 return __raw_readb(OMAP2_L4_IO_ADDRESS(pa));
 154 }
 155 EXPORT_SYMBOL(omap_readb);
 156
 157 u16 omap_readw(u32 pa)
 158 {
 159         if (cpu_class_is_omap1())
 160                 return __raw_readw(OMAP1_IO_ADDRESS(pa));
 161         else
 162                 return __raw_readw(OMAP2_L4_IO_ADDRESS(pa));
 163 }
 164 EXPORT_SYMBOL(omap_readw);
 165
 166 u32 omap_readl(u32 pa)
 167 {
 168         if (cpu_class_is_omap1())
 169                 return __raw_readl(OMAP1_IO_ADDRESS(pa));
 170         else
 171                 return __raw_readl(OMAP2_L4_IO_ADDRESS(pa));
 172 }
 173 EXPORT_SYMBOL(omap_readl);
 174
 175 void omap_writeb(u8 v, u32 pa)
 176 {
 177         if (cpu_class_is_omap1())
 178                 __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
 179         else
 180                 __raw_writeb(v, OMAP2_L4_IO_ADDRESS(pa));
 181 }
 182 EXPORT_SYMBOL(omap_writeb);
 183
 184 void omap_writew(u16 v, u32 pa)
 185 {
 186         if (cpu_class_is_omap1())
 187                 __raw_writew(v, OMAP1_IO_ADDRESS(pa));
 188         else
 189                 __raw_writew(v, OMAP2_L4_IO_ADDRESS(pa));
 190 }
 191 EXPORT_SYMBOL(omap_writew);
 192
 193 void omap_writel(u32 v, u32 pa)
 194 {
 195         if (cpu_class_is_omap1())
 196                 __raw_writel(v, OMAP1_IO_ADDRESS(pa));
 197         else
 198                 __raw_writel(v, OMAP2_L4_IO_ADDRESS(pa));
 199 }
 200 EXPORT_SYMBOL(omap_writel);