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, MERCHANTABILITY 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 * $FreeBSD$ 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 49 extern void ath_tdma_config(struct ath_softc *sc, struct ieee80211vap *vap); 50 extern void ath_tdma_update(struct ieee80211_node *ni, 51 const struct ieee80211_tdma_param *tdma, int changed); 52 extern void ath_tdma_beacon_send(struct ath_softc *sc, 53 struct ieee80211vap *vap); 54 55 #endif 56