dev/pitreg.h

   1 /*
   2  * Copyright (c) 2001-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /* @file
  30  * Device register definitions for a device's PCI config space
  31  */
  32
  33 #ifndef __PITREG_H__
  34 #define __PITREG_H__
  35
  36 #include <sys/types.h>
  37
  38 // Control Word Format
  39
  40 #define PIT_SEL_SHFT  0x6
  41 #define PIT_RW_SHFT   0x4
  42 #define PIT_MODE_SHFT 0x1
  43 #define PIT_BCD_SHFT  0x0
  44
  45 #define PIT_SEL_MASK  0x3
  46 #define PIT_RW_MASK   0x3
  47 #define PIT_MODE_MASK 0x7
  48 #define PIT_BCD_MASK  0x1
  49
  50 #define GET_CTRL_FIELD(x, s, m) (((x) >> s) & m)
  51 #define GET_CTRL_SEL(x) GET_CTRL_FIELD(x, PIT_SEL_SHFT, PIT_SEL_MASK)
  52 #define GET_CTRL_RW(x) GET_CTRL_FIELD(x, PIT_RW_SHFT, PIT_RW_MASK)
  53 #define GET_CTRL_MODE(x) GET_CTRL_FIELD(x, PIT_MODE_SHFT, PIT_MODE_MASK)
  54 #define GET_CTRL_BCD(x) GET_CTRL_FIELD(x, PIT_BCD_SHFT, PIT_BCD_MASK)
  55
  56 #define PIT_READ_BACK 0x3
  57
  58 #define PIT_RW_LATCH_COMMAND 0x0
  59 #define PIT_RW_LSB_ONLY      0x1
  60 #define PIT_RW_MSB_ONLY      0x2
  61 #define PIT_RW_16BIT         0x3
  62
  63 #define PIT_MODE_INTTC    0x0
  64 #define PIT_MODE_ONESHOT  0x1
  65 #define PIT_MODE_RATEGEN  0x2
  66 #define PIT_MODE_SQWAVE   0x3
  67 #define PIT_MODE_SWSTROBE 0x4
  68 #define PIT_MODE_HWSTROBE 0x5
  69
  70 #define PIT_BCD_FALSE 0x0
  71 #define PIT_BCD_TRUE  0x1
  72
  73 #endif // __PITREG_H__