69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
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/* This code originally came from a nice man, I don't have your name,
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* please email cokane@pohl.ececs.uc.edu for proper recognition
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* it is basically a derivative of some sys/dhio.h file to work with the 3dfx
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* cards
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*/
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#ifndef TDFX_IO_H
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#define TDFX_IO_H
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#ifndef KERNEL
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#include <sys/types.h>
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#endif
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/*
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* define an ioctl here
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*/
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#define DHIOCRESET _IO('D', 0) /* reset the voodoo device */
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#define GETVOODOO 0x3302
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#define SETVOODOO 0x3303
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#define MOREVOODOO 0x3300
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#define _IOC_NRBITS 8
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#define _IOC_TYPEBITS 8
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#define _IOC_SIZEBITS 14
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#define _IOC_DIRBITS 2
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#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
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#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
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#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
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#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
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#define _IOC_NRSHIFT 0
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#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
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#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
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#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
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/*
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* Direction bits.
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*/
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#define _IOC_NONE 0U
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#define _IOC_WRITE 1U
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#define _IOC_READ 2U
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#define _IOCV(dir,type,nr,size) \
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(((dir) << _IOC_DIRSHIFT) | \
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((type) << _IOC_TYPESHIFT) | \
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((nr) << _IOC_NRSHIFT) | \
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((size) << _IOC_SIZESHIFT))
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/* used to create numbers */
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#define _IOV(type,nr) _IOCV(_IOC_NONE,(type),(nr),0)
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#define _IORV(type,nr,size) _IOCV(_IOC_READ,(type),(nr),sizeof(size))
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#define _IOWV(type,nr,size) _IOCV(_IOC_WRITE,(type),(nr),sizeof(size))
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#define _IOWRV(type,nr,size) _IOCV(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
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/* used to decode ioctl numbers.. */
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#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
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#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
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#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
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#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
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/* ...and for the drivers/sound files... */
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#define IOCV_IN (_IOC_WRITE << _IOC_DIRSHIFT)
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#define IOCV_OUT (_IOC_READ << _IOC_DIRSHIFT)
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#define IOCV_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
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#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
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#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
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#endif
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