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 #include <mach/mux.h>
  19 #include <mach/tc.h>
  20
  21 extern int omap1_clk_init(void);
  22 extern void omap_check_revision(void);
  23 extern void omap_sram_init(void);
  24 extern void omapfb_reserve_sdram(void);
  25
  26 /*
  27  * The machine specific code may provide the extra mapping besides the
  28  * default mapping provided here.
  29  */
  30 static struct map_desc omap_io_desc[] __initdata = {
  31         {
  32                 .virtual        = IO_VIRT,
  33                 .pfn            = __phys_to_pfn(IO_PHYS),
  34                 .length         = IO_SIZE,
  35                 .type           = MT_DEVICE
  36         }
  37 };
  38
  39 #ifdef CONFIG_ARCH_OMAP730
  40 static struct map_desc omap730_io_desc[] __initdata = {
  41         {
  42                 .virtual        = OMAP730_DSP_BASE,
  43                 .pfn            = __phys_to_pfn(OMAP730_DSP_START),
  44                 .length         = OMAP730_DSP_SIZE,
  45                 .type           = MT_DEVICE
  46         }, {
  47                 .virtual        = OMAP730_DSPREG_BASE,
  48                 .pfn            = __phys_to_pfn(OMAP730_DSPREG_START),
  49                 .length         = OMAP730_DSPREG_SIZE,
  50                 .type           = MT_DEVICE
  51         }
  52 };
  53 #endif
  54
  55 #ifdef CONFIG_ARCH_OMAP850
  56 static struct map_desc omap850_io_desc[] __initdata = {
  57         {
  58                 .virtual        = OMAP850_DSP_BASE,
  59                 .pfn            = __phys_to_pfn(OMAP850_DSP_START),
  60                 .length         = OMAP850_DSP_SIZE,
  61                 .type           = MT_DEVICE
  62         }, {
  63                 .virtual        = OMAP850_DSPREG_BASE,
  64                 .pfn            = __phys_to_pfn(OMAP850_DSPREG_START),
  65                 .length         = OMAP850_DSPREG_SIZE,
  66                 .type           = MT_DEVICE
  67         }
  68 };
  69 #endif
  70
  71 #ifdef CONFIG_ARCH_OMAP15XX
  72 static struct map_desc omap1510_io_desc[] __initdata = {
  73         {
  74                 .virtual        = OMAP1510_DSP_BASE,
  75                 .pfn            = __phys_to_pfn(OMAP1510_DSP_START),
  76                 .length         = OMAP1510_DSP_SIZE,
  77                 .type           = MT_DEVICE
  78         }, {
  79                 .virtual        = OMAP1510_DSPREG_BASE,
  80                 .pfn            = __phys_to_pfn(OMAP1510_DSPREG_START),
  81                 .length         = OMAP1510_DSPREG_SIZE,
  82                 .type           = MT_DEVICE
  83         }
  84 };
  85 #endif
  86
  87 #if defined(CONFIG_ARCH_OMAP16XX)
  88 static struct map_desc omap16xx_io_desc[] __initdata = {
  89         {
  90                 .virtual        = OMAP16XX_DSP_BASE,
  91                 .pfn            = __phys_to_pfn(OMAP16XX_DSP_START),
  92                 .length         = OMAP16XX_DSP_SIZE,
  93                 .type           = MT_DEVICE
  94         }, {
  95                 .virtual        = OMAP16XX_DSPREG_BASE,
  96                 .pfn            = __phys_to_pfn(OMAP16XX_DSPREG_START),
  97                 .length         = OMAP16XX_DSPREG_SIZE,
  98                 .type           = MT_DEVICE
  99         }
 100 };
 101 #endif
 102
 103 /*
 104  * Maps common IO regions for omap1. This should only get called from
 105  * board specific init.
 106  */
 107 void __init omap1_map_common_io(void)
 108 {
 109         iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
 110
 111         /* Normally devicemaps_init() would flush caches and tlb after
 112          * mdesc->map_io(), but we must also do it here because of the CPU
 113          * revision check below.
 114          */
 115         local_flush_tlb_all();
 116         flush_cache_all();
 117
 118         /* We want to check CPU revision early for cpu_is_omapxxxx() macros.
 119          * IO space mapping must be initialized before we can do that.
 120          */
 121         omap_check_revision();
 122
 123 #ifdef CONFIG_ARCH_OMAP730
 124         if (cpu_is_omap730()) {
 125                 iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc));
 126         }
 127 #endif
 128
 129 #ifdef CONFIG_ARCH_OMAP850
 130         if (cpu_is_omap850()) {
 131                 iotable_init(omap850_io_desc, ARRAY_SIZE(omap850_io_desc));
 132         }
 133 #endif
 134
 135 #ifdef CONFIG_ARCH_OMAP15XX
 136         if (cpu_is_omap15xx()) {
 137                 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
 138         }
 139 #endif
 140 #if defined(CONFIG_ARCH_OMAP16XX)
 141         if (cpu_is_omap16xx()) {
 142                 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
 143         }
 144 #endif
 145
 146         omap_sram_init();
 147         omapfb_reserve_sdram();
 148 }
 149
 150 /*
 151  * Common low-level hardware init for omap1. This should only get called from
 152  * board specific init.
 153  */
 154 void __init omap1_init_common_hw(void)
 155 {
 156         /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
 157          * on a Posted Write in the TIPB Bridge".
 158          */
 159         omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
 160         omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
 161
 162         /* Must init clocks early to assure that timer interrupt works
 163          */
 164         omap1_clk_init();
 165
 166         omap1_mux_init();
 167 }
 168