arch/arm/mach-omap1/io.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/arch/arm/mach-omap1/io.c
   4  *
   5  * OMAP1 I/O mapping code
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <linux/io.h>
  12 #include <linux/omap-dma.h>
  13
  14 #include <asm/tlb.h>
  15 #include <asm/mach/map.h>
  16
  17 #include "tc.h"
  18 #include "iomap.h"
  19 #include "common.h"
  20
  21 /*
  22  * The machine specific code may provide the extra mapping besides the
  23  * default mapping provided here.
  24  */
  25 static struct map_desc omap_io_desc[] __initdata = {
  26         {
  27                 .virtual        = OMAP1_IO_VIRT,
  28                 .pfn            = __phys_to_pfn(OMAP1_IO_PHYS),
  29                 .length         = OMAP1_IO_SIZE,
  30                 .type           = MT_DEVICE
  31         }
  32 };
  33
  34 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
  35 static struct map_desc omap7xx_io_desc[] __initdata = {
  36         {
  37                 .virtual        = OMAP7XX_DSP_BASE,
  38                 .pfn            = __phys_to_pfn(OMAP7XX_DSP_START),
  39                 .length         = OMAP7XX_DSP_SIZE,
  40                 .type           = MT_DEVICE
  41         }, {
  42                 .virtual        = OMAP7XX_DSPREG_BASE,
  43                 .pfn            = __phys_to_pfn(OMAP7XX_DSPREG_START),
  44                 .length         = OMAP7XX_DSPREG_SIZE,
  45                 .type           = MT_DEVICE
  46         }
  47 };
  48 #endif
  49
  50 #ifdef CONFIG_ARCH_OMAP15XX
  51 static struct map_desc omap1510_io_desc[] __initdata = {
  52         {
  53                 .virtual        = OMAP1510_DSP_BASE,
  54                 .pfn            = __phys_to_pfn(OMAP1510_DSP_START),
  55                 .length         = OMAP1510_DSP_SIZE,
  56                 .type           = MT_DEVICE
  57         }, {
  58                 .virtual        = OMAP1510_DSPREG_BASE,
  59                 .pfn            = __phys_to_pfn(OMAP1510_DSPREG_START),
  60                 .length         = OMAP1510_DSPREG_SIZE,
  61                 .type           = MT_DEVICE
  62         }
  63 };
  64 #endif
  65
  66 #if defined(CONFIG_ARCH_OMAP16XX)
  67 static struct map_desc omap16xx_io_desc[] __initdata = {
  68         {
  69                 .virtual        = OMAP16XX_DSP_BASE,
  70                 .pfn            = __phys_to_pfn(OMAP16XX_DSP_START),
  71                 .length         = OMAP16XX_DSP_SIZE,
  72                 .type           = MT_DEVICE
  73         }, {
  74                 .virtual        = OMAP16XX_DSPREG_BASE,
  75                 .pfn            = __phys_to_pfn(OMAP16XX_DSPREG_START),
  76                 .length         = OMAP16XX_DSPREG_SIZE,
  77                 .type           = MT_DEVICE
  78         }
  79 };
  80 #endif
  81
  82 /*
  83  * Maps common IO regions for omap1
  84  */
  85 static void __init omap1_map_common_io(void)
  86 {
  87         iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
  88 }
  89
  90 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
  91 void __init omap7xx_map_io(void)
  92 {
  93         omap1_map_common_io();
  94         iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
  95 }
  96 #endif
  97
  98 #ifdef CONFIG_ARCH_OMAP15XX
  99 void __init omap15xx_map_io(void)
 100 {
 101         omap1_map_common_io();
 102         iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
 103 }
 104 #endif
 105
 106 #if defined(CONFIG_ARCH_OMAP16XX)
 107 void __init omap16xx_map_io(void)
 108 {
 109         omap1_map_common_io();
 110         iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
 111 }
 112 #endif
 113
 114 /*
 115  * Common low-level hardware init for omap1.
 116  */
 117 void __init omap1_init_early(void)
 118 {
 119         omap_check_revision();
 120
 121         /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
 122          * on a Posted Write in the TIPB Bridge".
 123          */
 124         omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
 125         omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
 126 }
 127
 128 void __init omap1_init_late(void)
 129 {
 130         omap_serial_wakeup_init();
 131 }
 132
 133 /*
 134  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
 135  */
 136
 137 u8 omap_readb(u32 pa)
 138 {
 139         return __raw_readb(OMAP1_IO_ADDRESS(pa));
 140 }
 141 EXPORT_SYMBOL(omap_readb);
 142
 143 u16 omap_readw(u32 pa)
 144 {
 145         return __raw_readw(OMAP1_IO_ADDRESS(pa));
 146 }
 147 EXPORT_SYMBOL(omap_readw);
 148
 149 u32 omap_readl(u32 pa)
 150 {
 151         return __raw_readl(OMAP1_IO_ADDRESS(pa));
 152 }
 153 EXPORT_SYMBOL(omap_readl);
 154
 155 void omap_writeb(u8 v, u32 pa)
 156 {
 157         __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
 158 }
 159 EXPORT_SYMBOL(omap_writeb);
 160
 161 void omap_writew(u16 v, u32 pa)
 162 {
 163         __raw_writew(v, OMAP1_IO_ADDRESS(pa));
 164 }
 165 EXPORT_SYMBOL(omap_writew);
 166
 167 void omap_writel(u32 v, u32 pa)
 168 {
 169         __raw_writel(v, OMAP1_IO_ADDRESS(pa));
 170 }
 171 EXPORT_SYMBOL(omap_writel);