1/*-
2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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 *    without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 *    redistribution must be conditioned upon including a substantially
14 *    similar Disclaimer requirement for further binary redistribution.
15 *
16 * NO WARRANTY
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGES.
28 *
29 * $FreeBSD: releng/10.2/sys/dev/ath/if_ath_tdma.h 235679 2012-05-20 02:49:42Z adrian $
30 */
31#ifndef	__IF_ATH_TDMA_H__
32#define	__IF_ATH_TDMA_H__
33
34#define	TDMA_EP_MULTIPLIER	(1<<10) /* pow2 to optimize out * and / */
35#define	TDMA_LPF_LEN		6
36#define	TDMA_DUMMY_MARKER	0x127
37#define	TDMA_EP_MUL(x, mul)	((x) * (mul))
38#define	TDMA_IN(x)		(TDMA_EP_MUL((x), TDMA_EP_MULTIPLIER))
39#define	TDMA_LPF(x, y, len)					\
40    ((x != TDMA_DUMMY_MARKER) ? (((x) * ((len)-1) + (y)) / (len)) : (y))
41#define	TDMA_SAMPLE(x, y)	do {				\
42        x = TDMA_LPF((x), TDMA_IN(y), TDMA_LPF_LEN);		\
43} while (0)
44#define	TDMA_EP_RND(x,mul) \
45	    ((((x)%(mul)) >= ((mul)/2)) ?			\
46	     ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
47#define	TDMA_AVG(x)		TDMA_EP_RND(x, TDMA_EP_MULTIPLIER)
48
49extern	void ath_tdma_config(struct ath_softc *sc, struct ieee80211vap *vap);
50extern	void ath_tdma_update(struct ieee80211_node *ni,
51	    const struct ieee80211_tdma_param *tdma, int changed);
52extern	void ath_tdma_beacon_send(struct ath_softc *sc,
53	    struct ieee80211vap *vap);
54
55#endif
56