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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * linux/arch/sh/boards/superh/microdev/io.c
   4  *
   5  * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
   6  * Copyright (C) 2003, 2004 SuperH, Inc.
   7  * Copyright (C) 2004 Paul Mundt
   8  *
   9  * SuperH SH4-202 MicroDev board support.
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/pci.h>
  14 #include <linux/wait.h>
  15 #include <asm/io.h>
  16 #include <mach/microdev.h>
  17
  18         /*
  19          *      we need to have a 'safe' address to re-direct all I/O requests
  20          *      that we do not explicitly wish to handle. This safe address
  21          *      must have the following properies:
  22          *
  23          *              * writes are ignored (no exception)
  24          *              * reads are benign (no side-effects)
  25          *              * accesses of width 1, 2 and 4-bytes are all valid.
  26          *
  27          *      The Processor Version Register (PVR) has these properties.
  28          */
  29 #define PVR     0xff000030      /* Processor Version Register */
  30
  31
  32 #define IO_IDE2_BASE            0x170ul /* I/O base for SMSC FDC37C93xAPM IDE #2 */
  33 #define IO_IDE1_BASE            0x1f0ul /* I/O base for SMSC FDC37C93xAPM IDE #1 */
  34 #define IO_ISP1161_BASE         0x290ul /* I/O port for Philips ISP1161x USB chip */
  35 #define IO_SERIAL2_BASE         0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */
  36 #define IO_LAN91C111_BASE       0x300ul /* I/O base for SMSC LAN91C111 Ethernet chip */
  37 #define IO_IDE2_MISC            0x376ul /* I/O misc for SMSC FDC37C93xAPM IDE #2 */
  38 #define IO_SUPERIO_BASE         0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */
  39 #define IO_IDE1_MISC            0x3f6ul /* I/O misc for SMSC FDC37C93xAPM IDE #1 */
  40 #define IO_SERIAL1_BASE         0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */
  41
  42 #define IO_ISP1161_EXTENT       0x04ul  /* I/O extent for Philips ISP1161x USB chip */
  43 #define IO_LAN91C111_EXTENT     0x10ul  /* I/O extent for SMSC LAN91C111 Ethernet chip */
  44 #define IO_SUPERIO_EXTENT       0x02ul  /* I/O extent for SMSC FDC37C93xAPM SuperIO chip */
  45 #define IO_IDE_EXTENT           0x08ul  /* I/O extent for IDE Task Register set */
  46 #define IO_SERIAL_EXTENT        0x10ul
  47
  48 #define IO_LAN91C111_PHYS       0xa7500000ul    /* Physical address of SMSC LAN91C111 Ethernet chip */
  49 #define IO_ISP1161_PHYS         0xa7700000ul    /* Physical address of Philips ISP1161x USB chip */
  50 #define IO_SUPERIO_PHYS         0xa7800000ul    /* Physical address of SMSC FDC37C93xAPM SuperIO chip */
  51
  52 /*
  53  * map I/O ports to memory-mapped addresses
  54  */
  55 void __iomem *microdev_ioport_map(unsigned long offset, unsigned int len)
  56 {
  57         unsigned long result;
  58
  59         if ((offset >= IO_LAN91C111_BASE) &&
  60             (offset <  IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
  61                         /*
  62                          *      SMSC LAN91C111 Ethernet chip
  63                          */
  64                 result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE;
  65         } else if ((offset >= IO_SUPERIO_BASE) &&
  66                    (offset <  IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) {
  67                         /*
  68                          *      SMSC FDC37C93xAPM SuperIO chip
  69                          *
  70                          *      Configuration Registers
  71                          */
  72                 result = IO_SUPERIO_PHYS + (offset << 1);
  73         } else if (((offset >= IO_IDE1_BASE) &&
  74                     (offset <  IO_IDE1_BASE + IO_IDE_EXTENT)) ||
  75                     (offset == IO_IDE1_MISC)) {
  76                         /*
  77                          *      SMSC FDC37C93xAPM SuperIO chip
  78                          *
  79                          *      IDE #1
  80                          */
  81                 result = IO_SUPERIO_PHYS + (offset << 1);
  82         } else if (((offset >= IO_IDE2_BASE) &&
  83                     (offset <  IO_IDE2_BASE + IO_IDE_EXTENT)) ||
  84                     (offset == IO_IDE2_MISC)) {
  85                         /*
  86                          *      SMSC FDC37C93xAPM SuperIO chip
  87                          *
  88                          *      IDE #2
  89                          */
  90                 result = IO_SUPERIO_PHYS + (offset << 1);
  91         } else if ((offset >= IO_SERIAL1_BASE) &&
  92                    (offset <  IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) {
  93                         /*
  94                          *      SMSC FDC37C93xAPM SuperIO chip
  95                          *
  96                          *      Serial #1
  97                          */
  98                 result = IO_SUPERIO_PHYS + (offset << 1);
  99         } else if ((offset >= IO_SERIAL2_BASE) &&
 100                    (offset <  IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) {
 101                         /*
 102                          *      SMSC FDC37C93xAPM SuperIO chip
 103                          *
 104                          *      Serial #2
 105                          */
 106                 result = IO_SUPERIO_PHYS + (offset << 1);
 107         } else if ((offset >= IO_ISP1161_BASE) &&
 108                    (offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) {
 109                         /*
 110                          *      Philips USB ISP1161x chip
 111                          */
 112                 result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE;
 113         } else {
 114                         /*
 115                          *      safe default.
 116                          */
 117                 printk("Warning: unexpected port in %s( offset = 0x%lx )\n",
 118                        __func__, offset);
 119                 result = PVR;
 120         }
 121
 122         return (void __iomem *)result;
 123 }