020cb2200b
The PHY-N code uses a different format for gain values, so these macros are used for converting to/from and print out values.
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*-
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* Copyright (c) 2016 Adrian Chadd <adrian@FreeBSD.org>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $FreeBSD$
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*/
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#ifndef __IF_BWN_UTIL_H__
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#define __IF_BWN_UTIL_H__
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/* Hamming weight; used in the PHY routines */
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static inline int
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bwn_hweight32(uint32_t val)
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{
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int i, r = 0;
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/* yes, could do it without a loop.. */
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for (i = 0; i < 32; i++) {
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r = r + (val & 1);
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val = val >> 1;
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}
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return r;
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}
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/* Clamp value; PHY code */
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static inline int
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bwn_clamp_val(int val, int lo, int hi)
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{
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if (val < lo)
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return lo;
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if (val > hi)
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return hi;
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return val;
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}
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/* Q52 format - used in PHY routines */
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#define INT_TO_Q52(i) ((i) << 2)
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#define Q52_TO_INT(q52) ((q52) >> 2)
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#define Q52_FMT "%u.%u"
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#define Q52_ARG(q52) Q52_TO_INT(q52), ((((q52) & 0x3) * 100) / 4)
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extern unsigned int bwn_sqrt(struct bwn_mac *mac, unsigned int x);
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#endif /* __IF_BWN_UTIL_H__ */
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