usr/src/uts/common/sys/i8042.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_I8042_H
  27 #define _SYS_I8042_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 /*
  34  * Here's the interface to the virtual registers on the device.
  35  *
  36  * Normal interrupt-driven I/O:
  37  *
  38  * I8042_INT_INPUT_AVAIL
  39  *      Interrupt mode input bytes available?  Zero = No.
  40  * I8042_INT_INPUT_DATA
  41  *      Fetch interrupt mode input byte.
  42  * I8042_INT_OUTPUT_DATA
  43  *      Interrupt mode output byte.
  44  *
  45  * Polled I/O, used by (e.g.) kmdb, when normal system services are
  46  * unavailable:
  47  *
  48  * I8042_POLL_INPUT_AVAIL
  49  *      Polled mode input bytes available?  Zero = No.
  50  * I8042_POLL_INPUT_DATA
  51  *      Polled mode input byte.
  52  * I8042_POLL_OUTPUT_DATA
  53  *      Polled mode output byte.
  54  */
  55
  56 #define I8042_INT_INPUT_AVAIL           0x00
  57 #define I8042_INT_INPUT_DATA            0x01
  58 #define I8042_INT_OUTPUT_DATA           0x03
  59 #define I8042_LOCK                      0x05    /* See comment below */
  60 #define I8042_POLL_INPUT_AVAIL          0x10
  61 #define I8042_POLL_INPUT_DATA           0x11
  62 #define I8042_POLL_OUTPUT_DATA          0x13
  63 #define I8042_UNLOCK                    0x15    /* See comment below */
  64
  65 /*
  66  * The I8042_LOCK and I8042_UNLOCK virtual
  67  * registers are meant to be used by child drivers that require exclusive
  68  * access to the 8042 registers for an atomic transaction (e.g. keyboard
  69  * enable, mouse reset) that consists of multiple single-byte commands
  70  * and (possibly) their arguments.
  71  */
  72
  73 /* Softint priority used */
  74 #define I8042_SOFTINT_PRI       4
  75
  76 #ifdef  __cplusplus
  77 }
  78 #endif
  79
  80 #endif  /* _SYS_I8042_H */