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 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
  26 static struct map_desc omap7xx_io_desc[] __initdata = {
  27         {
  28                 .virtual        = OMAP1_IO_VIRT,
  29                 .pfn            = __phys_to_pfn(OMAP1_IO_PHYS),
  30                 .length         = OMAP1_IO_SIZE,
  31                 .type           = MT_DEVICE
  32         },
  33         {
  34                 .virtual        = OMAP7XX_DSP_BASE,
  35                 .pfn            = __phys_to_pfn(OMAP7XX_DSP_START),
  36                 .length         = OMAP7XX_DSP_SIZE,
  37                 .type           = MT_DEVICE
  38         }, {
  39                 .virtual        = OMAP7XX_DSPREG_BASE,
  40                 .pfn            = __phys_to_pfn(OMAP7XX_DSPREG_START),
  41                 .length         = OMAP7XX_DSPREG_SIZE,
  42                 .type           = MT_DEVICE
  43         }
  44 };
  45 #endif
  46
  47 #ifdef CONFIG_ARCH_OMAP15XX
  48 static struct map_desc omap1510_io_desc[] __initdata = {
  49         {
  50                 .virtual        = OMAP1_IO_VIRT,
  51                 .pfn            = __phys_to_pfn(OMAP1_IO_PHYS),
  52                 .length         = OMAP1_IO_SIZE,
  53                 .type           = MT_DEVICE
  54         },
  55         {
  56                 .virtual        = OMAP1510_DSP_BASE,
  57                 .pfn            = __phys_to_pfn(OMAP1510_DSP_START),
  58                 .length         = OMAP1510_DSP_SIZE,
  59                 .type           = MT_DEVICE
  60         }, {
  61                 .virtual        = OMAP1510_DSPREG_BASE,
  62                 .pfn            = __phys_to_pfn(OMAP1510_DSPREG_START),
  63                 .length         = OMAP1510_DSPREG_SIZE,
  64                 .type           = MT_DEVICE
  65         }
  66 };
  67 #endif
  68
  69 #if defined(CONFIG_ARCH_OMAP16XX)
  70 static struct map_desc omap16xx_io_desc[] __initdata = {
  71         {
  72                 .virtual        = OMAP1_IO_VIRT,
  73                 .pfn            = __phys_to_pfn(OMAP1_IO_PHYS),
  74                 .length         = OMAP1_IO_SIZE,
  75                 .type           = MT_DEVICE
  76         },
  77         {
  78                 .virtual        = OMAP16XX_DSP_BASE,
  79                 .pfn            = __phys_to_pfn(OMAP16XX_DSP_START),
  80                 .length         = OMAP16XX_DSP_SIZE,
  81                 .type           = MT_DEVICE
  82         }, {
  83                 .virtual        = OMAP16XX_DSPREG_BASE,
  84                 .pfn            = __phys_to_pfn(OMAP16XX_DSPREG_START),
  85                 .length         = OMAP16XX_DSPREG_SIZE,
  86                 .type           = MT_DEVICE
  87         }
  88 };
  89 #endif
  90
  91 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
  92 void __init omap7xx_map_io(void)
  93 {
  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         iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
 102 }
 103 #endif
 104
 105 #if defined(CONFIG_ARCH_OMAP16XX)
 106 void __init omap16xx_map_io(void)
 107 {
 108         iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
 109 }
 110 #endif
 111
 112 /*
 113  * Common low-level hardware init for omap1.
 114  */
 115 void __init omap1_init_early(void)
 116 {
 117         omap_check_revision();
 118
 119         /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
 120          * on a Posted Write in the TIPB Bridge".
 121          */
 122         omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
 123         omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
 124 }
 125
 126 void __init omap1_init_late(void)
 127 {
 128         omap_serial_wakeup_init();
 129 }
 130
 131 /*
 132  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
 133  */
 134
 135 u8 omap_readb(u32 pa)
 136 {
 137         return __raw_readb(OMAP1_IO_ADDRESS(pa));
 138 }
 139 EXPORT_SYMBOL(omap_readb);
 140
 141 u16 omap_readw(u32 pa)
 142 {
 143         return __raw_readw(OMAP1_IO_ADDRESS(pa));
 144 }
 145 EXPORT_SYMBOL(omap_readw);
 146
 147 u32 omap_readl(u32 pa)
 148 {
 149         return __raw_readl(OMAP1_IO_ADDRESS(pa));
 150 }
 151 EXPORT_SYMBOL(omap_readl);
 152
 153 void omap_writeb(u8 v, u32 pa)
 154 {
 155         __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
 156 }
 157 EXPORT_SYMBOL(omap_writeb);
 158
 159 void omap_writew(u16 v, u32 pa)
 160 {
 161         __raw_writew(v, OMAP1_IO_ADDRESS(pa));
 162 }
 163 EXPORT_SYMBOL(omap_writew);
 164
 165 void omap_writel(u32 v, u32 pa)
 166 {
 167         __raw_writel(v, OMAP1_IO_ADDRESS(pa));
 168 }
 169 EXPORT_SYMBOL(omap_writel);