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   1 /*
   2  * Copyright (c) 2005-2008, Kohsuke Ohtani
   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
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contibutors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 #ifndef _SYS_IOCTL_H_
  31 #define _SYS_IOCTL_H_
  33 #include <sys/cdefs.h>
  34 #include <sys/time.h>
  35 #include <sys/power.h>
  37 /*
  38  * Ioctl's have the command encoded in the lower word, and the size of
  39  * any in or out parameters in the upper word.  The high 3 bits of the
  40  * upper word are used to encode the in/out status of the parameter.
  41  */
  42 #define IOCPARM_MASK    0xff            /* parameter length, at most 13 bits */
  43 #define IOCPARM_LEN(x)  (((x) >> 16) & IOCPARM_MASK)
  44 #define IOCBASECMD(x)   ((x) & ~(IOCPARM_MASK << 16))
  45 #define IOCGROUP(x)     (((x) >> 8) & 0xff)
  47 #define IOCPARM_MAX     256
  49 #define IOC_VOID        0x20000000      /* no parameters */
  50 #define IOC_OUT         0x40000000      /* copy out parameters */
  51 #define IOC_IN          0x80000000U     /* copy in parameters */
  52 #define IOC_INOUT       (IOC_IN|IOC_OUT)
  53 #define IOC_DIRMASK     0xe0000000
  55 /* Prex */
  56 #define IOC_IVAL        0x10000000      /* input argument is immediate value */
  57 #define IOC_OVAL        0x08000000      /* return value as output */
  59 #define _IOC(inout,group,num,len) \
  60         (u_long)(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
  61 #define _IO(g,n)        _IOC(IOC_VOID,  (g), (n), 0)
  62 #define _IOR(g,n,t)     _IOC(IOC_OUT,   (g), (n), sizeof(t))
  63 #define _IOW(g,n,t)     _IOC(IOC_IN,    (g), (n), sizeof(t))
  64 /* this should be _IORW, but stdio got there first */
  65 #define _IOWR(g,n,t)    _IOC(IOC_INOUT, (g), (n), sizeof(t))
  67 #define _IORN(g,n,t)    _IOC((IOC_OVAL|IOC_OUT), (g), (n), sizeof(t))
  68 #define _IOWN(g,n,t)    _IOC((IOC_IVAL|IOC_IN),  (g), (n), sizeof(t))
  71 /*
  72  * CPU frequency I/O control code
  73  */
  74 #define CFIOC_GET_INFO           _IOR('6', 0, struct cpufreqinfo)
  76 /*
  77  * CPU frequency information
  78  */
  79 struct cpufreqinfo {
  80         int     maxfreq;        /* max speed in MHz */
  81         int     maxvolts;       /* max power in mV */
  82         int     freq;           /* current speed in MHz */
  83         int     volts;          /* current power in mV */
  84 };
  86 /*
  87  * Power management I/O control code
  88  */
  89 #define PMIOC_CONNECT            _IOW('P', 0, int)
  90 #define PMIOC_QUERY_EVENT        _IOW('P', 1, int)
  91 #define PMIOC_SET_POWER          _IOW('P', 2, int)
  92 #define PMIOC_GET_SUSTMR         _IOR('P', 3, int)
  93 #define PMIOC_SET_SUSTMR         _IOW('P', 4, int)
  94 #define PMIOC_GET_DIMTMR         _IOR('P', 5, int)
  95 #define PMIOC_SET_DIMTMR         _IOW('P', 6, int)
  96 #define PMIOC_GET_POLICY         _IOR('P', 7, int)
  97 #define PMIOC_SET_POLICY         _IOW('P', 8, int)
  99 /*
 100  * RTC I/O control code
 101  */
 102 #define RTCIOC_GET_TIME          _IOR('R', 0, struct __timeval)
 103 #define RTCIOC_SET_TIME          _IOW('R', 1, struct __timeval)
 105 struct __timeval {
 106         long    tv_sec;         /* seconds */
 107         long    tv_usec;        /* and microseconds */
 108 };
__BEGIN_DECLS
 111 int     ioctl(int, unsigned long, ...);
__END_DECLS
 114 #endif  /* !_SYS_IOCTL_H_ */