LXR linux/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 <mach/mux.h>
  20#include <mach/tc.h>
  21#include <linux/omap-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 */
  31static 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)
  41static 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
  57static 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)
  73static 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 */
  91static 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)
  97void __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
 105void __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)
 113void __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 */
 123void __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}
 138
 139void __init omap1_init_late(void)
 140{
 141        omap_serial_wakeup_init();
 142}
 143
 144/*
 145 * NOTE: Please use ioremap + __raw_read/write where possible instead of these
 146 */
 147
 148u8 omap_readb(u32 pa)
 149{
 150        return __raw_readb(OMAP1_IO_ADDRESS(pa));
 151}
 152EXPORT_SYMBOL(omap_readb);
 153
 154u16 omap_readw(u32 pa)
 155{
 156        return __raw_readw(OMAP1_IO_ADDRESS(pa));
 157}
 158EXPORT_SYMBOL(omap_readw);
 159
 160u32 omap_readl(u32 pa)
 161{
 162        return __raw_readl(OMAP1_IO_ADDRESS(pa));
 163}
 164EXPORT_SYMBOL(omap_readl);
 165
 166void omap_writeb(u8 v, u32 pa)
 167{
 168        __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
 169}
 170EXPORT_SYMBOL(omap_writeb);
 171
 172void omap_writew(u16 v, u32 pa)
 173{
 174        __raw_writew(v, OMAP1_IO_ADDRESS(pa));
 175}
 176EXPORT_SYMBOL(omap_writew);
 177
 178void omap_writel(u32 v, u32 pa)
 179{
 180        __raw_writel(v, OMAP1_IO_ADDRESS(pa));
 181}
 182EXPORT_SYMBOL(omap_writel);
 183