LXR linux/arch/sh/boards/mach-microdev/io.c

   1/*
   2 * linux/arch/sh/boards/superh/microdev/io.c
   3 *
   4 * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
   5 * Copyright (C) 2003, 2004 SuperH, Inc.
   6 * Copyright (C) 2004 Paul Mundt
   7 *
   8 * SuperH SH4-202 MicroDev board support.
   9 *
  10 * May be copied or modified under the terms of the GNU General Public
  11 * License.  See linux/COPYING for more information.
  12 */
  13
  14#include <linux/init.h>
  15#include <linux/pci.h>
  16#include <linux/wait.h>
  17#include <asm/io.h>
  18#include <mach/microdev.h>
  19
  20        /*
  21         *      we need to have a 'safe' address to re-direct all I/O requests
  22         *      that we do not explicitly wish to handle. This safe address
  23         *      must have the following properies:
  24         *
  25         *              * writes are ignored (no exception)
  26         *              * reads are benign (no side-effects)
  27         *              * accesses of width 1, 2 and 4-bytes are all valid.
  28         *
  29         *      The Processor Version Register (PVR) has these properties.
  30         */
  31#define PVR     0xff000030      /* Processor Version Register */
  32
  33
  34#define IO_IDE2_BASE            0x170ul /* I/O base for SMSC FDC37C93xAPM IDE #2 */
  35#define IO_IDE1_BASE            0x1f0ul /* I/O base for SMSC FDC37C93xAPM IDE #1 */
  36#define IO_ISP1161_BASE         0x290ul /* I/O port for Philips ISP1161x USB chip */
  37#define IO_SERIAL2_BASE         0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */
  38#define IO_LAN91C111_BASE       0x300ul /* I/O base for SMSC LAN91C111 Ethernet chip */
  39#define IO_IDE2_MISC            0x376ul /* I/O misc for SMSC FDC37C93xAPM IDE #2 */
  40#define IO_SUPERIO_BASE         0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */
  41#define IO_IDE1_MISC            0x3f6ul /* I/O misc for SMSC FDC37C93xAPM IDE #1 */
  42#define IO_SERIAL1_BASE         0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */
  43
  44#define IO_ISP1161_EXTENT       0x04ul  /* I/O extent for Philips ISP1161x USB chip */
  45#define IO_LAN91C111_EXTENT     0x10ul  /* I/O extent for SMSC LAN91C111 Ethernet chip */
  46#define IO_SUPERIO_EXTENT       0x02ul  /* I/O extent for SMSC FDC37C93xAPM SuperIO chip */
  47#define IO_IDE_EXTENT           0x08ul  /* I/O extent for IDE Task Register set */
  48#define IO_SERIAL_EXTENT        0x10ul
  49
  50#define IO_LAN91C111_PHYS       0xa7500000ul    /* Physical address of SMSC LAN91C111 Ethernet chip */
  51#define IO_ISP1161_PHYS         0xa7700000ul    /* Physical address of Philips ISP1161x USB chip */
  52#define IO_SUPERIO_PHYS         0xa7800000ul    /* Physical address of SMSC FDC37C93xAPM SuperIO chip */
  53
  54/*
  55 * map I/O ports to memory-mapped addresses
  56 */
  57void __iomem *microdev_ioport_map(unsigned long offset, unsigned int len)
  58{
  59        unsigned long result;
  60
  61        if ((offset >= IO_LAN91C111_BASE) &&
  62            (offset <  IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
  63                        /*
  64                         *      SMSC LAN91C111 Ethernet chip
  65                         */
  66                result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE;
  67        } else if ((offset >= IO_SUPERIO_BASE) &&
  68                   (offset <  IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) {
  69                        /*
  70                         *      SMSC FDC37C93xAPM SuperIO chip
  71                         *
  72                         *      Configuration Registers
  73                         */
  74                result = IO_SUPERIO_PHYS + (offset << 1);
  75        } else if (((offset >= IO_IDE1_BASE) &&
  76                    (offset <  IO_IDE1_BASE + IO_IDE_EXTENT)) ||
  77                    (offset == IO_IDE1_MISC)) {
  78                        /*
  79                         *      SMSC FDC37C93xAPM SuperIO chip
  80                         *
  81                         *      IDE #1
  82                         */
  83                result = IO_SUPERIO_PHYS + (offset << 1);
  84        } else if (((offset >= IO_IDE2_BASE) &&
  85                    (offset <  IO_IDE2_BASE + IO_IDE_EXTENT)) ||
  86                    (offset == IO_IDE2_MISC)) {
  87                        /*
  88                         *      SMSC FDC37C93xAPM SuperIO chip
  89                         *
  90                         *      IDE #2
  91                         */
  92                result = IO_SUPERIO_PHYS + (offset << 1);
  93        } else if ((offset >= IO_SERIAL1_BASE) &&
  94                   (offset <  IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) {
  95                        /*
  96                         *      SMSC FDC37C93xAPM SuperIO chip
  97                         *
  98                         *      Serial #1
  99                         */
 100                result = IO_SUPERIO_PHYS + (offset << 1);
 101        } else if ((offset >= IO_SERIAL2_BASE) &&
 102                   (offset <  IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) {
 103                        /*
 104                         *      SMSC FDC37C93xAPM SuperIO chip
 105                         *
 106                         *      Serial #2
 107                         */
 108                result = IO_SUPERIO_PHYS + (offset << 1);
 109        } else if ((offset >= IO_ISP1161_BASE) &&
 110                   (offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) {
 111                        /*
 112                         *      Philips USB ISP1161x chip
 113                         */
 114                result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE;
 115        } else {
 116                        /*
 117                         *      safe default.
 118                         */
 119                printk("Warning: unexpected port in %s( offset = 0x%lx )\n",
 120                       __func__, offset);
 121                result = PVR;
 122        }
 123
 124        return (void __iomem *)result;
 125}
 126