arch/arm/mach-omap1/io.c

   1 /*
   2  * linux/arch/arm/mach-omap1/io.c
   3  *
   4  * OMAP1 I/O mapping code
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/io.h>
  15
  16 #include <asm/tlb.h>
  17 #include <asm/mach/map.h>
  18
  19 #include <plat/mux.h>
  20 #include <plat/tc.h>
  21 #include <plat/dma.h>
  22
  23 #include "iomap.h"
  24 #include "common.h"
  25 #include "clock.h"
  26
  27 /*
  28  * The machine specific code may provide the extra mapping besides the
  29  * default mapping provided here.
  30  */
  31 static struct map_desc omap_io_desc[] __initdata = {
  32         {
  33                 .virtual        = OMAP1_IO_VIRT,
  34                 .pfn            = __phys_to_pfn(OMAP1_IO_PHYS),
  35                 .length         = OMAP1_IO_SIZE,
  36                 .type           = MT_DEVICE
  37         }
  38 };
  39
  40 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
  41 static struct map_desc omap7xx_io_desc[] __initdata = {
  42         {
  43                 .virtual        = OMAP7XX_DSP_BASE,
  44                 .pfn            = __phys_to_pfn(OMAP7XX_DSP_START),
  45                 .length         = OMAP7XX_DSP_SIZE,
  46                 .type           = MT_DEVICE
  47         }, {
  48                 .virtual        = OMAP7XX_DSPREG_BASE,
  49                 .pfn            = __phys_to_pfn(OMAP7XX_DSPREG_START),
  50                 .length         = OMAP7XX_DSPREG_SIZE,
  51                 .type           = MT_DEVICE
  52         }
  53 };
  54 #endif
  55
  56 #ifdef CONFIG_ARCH_OMAP15XX
  57 static struct map_desc omap1510_io_desc[] __initdata = {
  58         {
  59                 .virtual        = OMAP1510_DSP_BASE,
  60                 .pfn            = __phys_to_pfn(OMAP1510_DSP_START),
  61                 .length         = OMAP1510_DSP_SIZE,
  62                 .type           = MT_DEVICE
  63         }, {
  64                 .virtual        = OMAP1510_DSPREG_BASE,
  65                 .pfn            = __phys_to_pfn(OMAP1510_DSPREG_START),
  66                 .length         = OMAP1510_DSPREG_SIZE,
  67                 .type           = MT_DEVICE
  68         }
  69 };
  70 #endif
  71
  72 #if defined(CONFIG_ARCH_OMAP16XX)
  73 static struct map_desc omap16xx_io_desc[] __initdata = {
  74         {
  75                 .virtual        = OMAP16XX_DSP_BASE,
  76                 .pfn            = __phys_to_pfn(OMAP16XX_DSP_START),
  77                 .length         = OMAP16XX_DSP_SIZE,
  78                 .type           = MT_DEVICE
  79         }, {
  80                 .virtual        = OMAP16XX_DSPREG_BASE,
  81                 .pfn            = __phys_to_pfn(OMAP16XX_DSPREG_START),
  82                 .length         = OMAP16XX_DSPREG_SIZE,
  83                 .type           = MT_DEVICE
  84         }
  85 };
  86 #endif
  87
  88 /*
  89  * Maps common IO regions for omap1
  90  */
  91 static void __init omap1_map_common_io(void)
  92 {
  93         iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
  94 }
  95
  96 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
  97 void __init omap7xx_map_io(void)
  98 {
  99         omap1_map_common_io();
 100         iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
 101 }
 102 #endif
 103
 104 #ifdef CONFIG_ARCH_OMAP15XX
 105 void __init omap15xx_map_io(void)
 106 {
 107         omap1_map_common_io();
 108         iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
 109 }
 110 #endif
 111
 112 #if defined(CONFIG_ARCH_OMAP16XX)
 113 void __init omap16xx_map_io(void)
 114 {
 115         omap1_map_common_io();
 116         iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
 117 }
 118 #endif
 119
 120 /*
 121  * Common low-level hardware init for omap1.
 122  */
 123 void __init omap1_init_early(void)
 124 {
 125         omap_check_revision();
 126
 127         /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
 128          * on a Posted Write in the TIPB Bridge".
 129          */
 130         omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
 131         omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
 132
 133         /* Must init clocks early to assure that timer interrupt works
 134          */
 135         omap1_clk_init();
 136         omap1_mux_init();
 137         omap_init_consistent_dma_size();
 138 }
 139
 140 void __init omap1_init_late(void)
 141 {
 142         omap_serial_wakeup_init();
 143 }
 144
 145 /*
 146  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
 147  */
 148
 149 u8 omap_readb(u32 pa)
 150 {
 151         return __raw_readb(OMAP1_IO_ADDRESS(pa));
 152 }
 153 EXPORT_SYMBOL(omap_readb);
 154
 155 u16 omap_readw(u32 pa)
 156 {
 157         return __raw_readw(OMAP1_IO_ADDRESS(pa));
 158 }
 159 EXPORT_SYMBOL(omap_readw);
 160
 161 u32 omap_readl(u32 pa)
 162 {
 163         return __raw_readl(OMAP1_IO_ADDRESS(pa));
 164 }
 165 EXPORT_SYMBOL(omap_readl);
 166
 167 void omap_writeb(u8 v, u32 pa)
 168 {
 169         __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
 170 }
 171 EXPORT_SYMBOL(omap_writeb);
 172
 173 void omap_writew(u16 v, u32 pa)
 174 {
 175         __raw_writew(v, OMAP1_IO_ADDRESS(pa));
 176 }
 177 EXPORT_SYMBOL(omap_writew);
 178
 179 void omap_writel(u32 v, u32 pa)
 180 {
 181         __raw_writel(v, OMAP1_IO_ADDRESS(pa));
 182 }
 183 EXPORT_SYMBOL(omap_writel);