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  */
  57 void __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 }