include/asm-arm/arch-omap/io.h

   1 /*
   2  * linux/include/asm-arm/arch-omap/io.h
   3  *
   4  * IO definitions for TI OMAP processors and boards
   5  *
   6  * Copied from linux/include/asm-arm/arch-sa1100/io.h
   7  * Copyright (C) 1997-1999 Russell King
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; either version 2 of the License, or (at your
  12  * option) any later version.
  13  *
  14  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  15  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  16  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  17  * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  20  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  21  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  * You should have received a copy of the GNU General Public License along
  26  * with this program; if not, write to the Free Software Foundation, Inc.,
  27  * 675 Mass Ave, Cambridge, MA 02139, USA.
  28  *
  29  * Modifications:
  30  *  06-12-1997  RMK     Created.
  31  *  07-04-1999  RMK     Major cleanup
  32  */
  33
  34 #ifndef __ASM_ARM_ARCH_IO_H
  35 #define __ASM_ARM_ARCH_IO_H
  36
  37 #include <asm/hardware.h>
  38
  39 #define IO_SPACE_LIMIT 0xffffffff
  40
  41 /*
  42  * We don't actually have real ISA nor PCI buses, but there is so many
  43  * drivers out there that might just work if we fake them...
  44  */
  45 #define __io(a)                 ((void __iomem *)(PCIO_BASE + (a)))
  46 #define __mem_pci(a)            (a)
  47 #define __mem_isa(a)            (a)
  48
  49 /*
  50  * ----------------------------------------------------------------------------
  51  * I/O mapping
  52  * ----------------------------------------------------------------------------
  53  */
  54
  55 #define PCIO_BASE       0
  56
  57 #if defined(CONFIG_ARCH_OMAP1)
  58
  59 #define IO_PHYS         0xFFFB0000
  60 #define IO_OFFSET       0x01000000      /* Virtual IO = 0xfefb0000 */
  61 #define IO_SIZE         0x40000
  62 #define IO_VIRT         (IO_PHYS - IO_OFFSET)
  63 #define IO_ADDRESS(pa)  ((pa) - IO_OFFSET)
  64 #define io_p2v(pa)      ((pa) - IO_OFFSET)
  65 #define io_v2p(va)      ((va) + IO_OFFSET)
  66
  67 #elif defined(CONFIG_ARCH_OMAP2)
  68
  69 /* We map both L3 and L4 on OMAP2 */
  70 #define L3_24XX_PHYS    L3_24XX_BASE    /* 0x68000000 */
  71 #define L3_24XX_VIRT    0xf8000000
  72 #define L3_24XX_SIZE    SZ_1M           /* 44kB of 128MB used, want 1MB sect */
  73 #define L4_24XX_PHYS    L4_24XX_BASE    /* 0x48000000 */
  74 #define L4_24XX_VIRT    0xd8000000
  75 #define L4_24XX_SIZE    SZ_1M           /* 1MB of 128MB used, want 1MB sect */
  76 #define IO_OFFSET       0x90000000
  77 #define IO_ADDRESS(pa)  ((pa) + IO_OFFSET)      /* Works for L3 and L4 */
  78 #define io_p2v(pa)      ((pa) + IO_OFFSET)      /* Works for L3 and L4 */
  79 #define io_v2p(va)      ((va) - IO_OFFSET)      /* Works for L3 and L4 */
  80
  81 #endif
  82
  83 #ifndef __ASSEMBLER__
  84
  85 /*
  86  * Functions to access the OMAP IO region
  87  *
  88  * NOTE: - Use omap_read/write[bwl] for physical register addresses
  89  *       - Use __raw_read/write[bwl]() for virtual register addresses
  90  *       - Use IO_ADDRESS(phys_addr) to convert registers to virtual addresses
  91  *       - DO NOT use hardcoded virtual addresses to allow changing the
  92  *         IO address space again if needed
  93  */
  94 #define omap_readb(a)           (*(volatile unsigned char  *)IO_ADDRESS(a))
  95 #define omap_readw(a)           (*(volatile unsigned short *)IO_ADDRESS(a))
  96 #define omap_readl(a)           (*(volatile unsigned int   *)IO_ADDRESS(a))
  97
  98 #define omap_writeb(v,a)        (*(volatile unsigned char  *)IO_ADDRESS(a) = (v))
  99 #define omap_writew(v,a)        (*(volatile unsigned short *)IO_ADDRESS(a) = (v))
 100 #define omap_writel(v,a)        (*(volatile unsigned int   *)IO_ADDRESS(a) = (v))
 101
 102 /* 16 bit uses LDRH/STRH, base +/- offset_8 */
 103 typedef struct { volatile u16 offset[256]; } __regbase16;
 104 #define __REGV16(vaddr)         ((__regbase16 *)((vaddr)&~0xff)) \
 105                                         ->offset[((vaddr)&0xff)>>1]
 106 #define __REG16(paddr)          __REGV16(io_p2v(paddr))
 107
 108 /* 8/32 bit uses LDR/STR, base +/- offset_12 */
 109 typedef struct { volatile u8 offset[4096]; } __regbase8;
 110 #define __REGV8(vaddr)          ((__regbase8  *)((vaddr)&~4095)) \
 111                                         ->offset[((vaddr)&4095)>>0]
 112 #define __REG8(paddr)           __REGV8(io_p2v(paddr))
 113
 114 typedef struct { volatile u32 offset[4096]; } __regbase32;
 115 #define __REGV32(vaddr)         ((__regbase32 *)((vaddr)&~4095)) \
 116                                         ->offset[((vaddr)&4095)>>2]
 117 #define __REG32(paddr)          __REGV32(io_p2v(paddr))
 118
 119 extern void omap_map_common_io(void);
 120
 121 #else
 122
 123 #define __REG8(paddr)           io_p2v(paddr)
 124 #define __REG16(paddr)          io_p2v(paddr)
 125 #define __REG32(paddr)          io_p2v(paddr)
 126
 127 #endif
 128
 129 #endif