drivers/net/wireless/ath/ath9k/common.h

   1 /*
   2  * Copyright (c) 2009-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <net/mac80211.h>
  18
  19 #include "../ath.h"
  20
  21 #include "hw.h"
  22 #include "hw-ops.h"
  23
  24 /* Common header for Atheros 802.11n base driver cores */
  25
  26 #define WME_BA_BMP_SIZE         64
  27 #define WME_MAX_BA              WME_BA_BMP_SIZE
  28 #define ATH_TID_MAX_BUFS        (2 * WME_MAX_BA)
  29
  30 #define ATH_RSSI_DUMMY_MARKER   127
  31 #define ATH_RSSI_LPF_LEN                10
  32 #define RSSI_LPF_THRESHOLD              -20
  33 #define ATH_RSSI_EP_MULTIPLIER     (1<<7)
  34 #define ATH_EP_MUL(x, mul)         ((x) * (mul))
  35 #define ATH_RSSI_IN(x)             (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
  36 #define ATH_LPF_RSSI(x, y, len) \
  37     ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
  38 #define ATH_RSSI_LPF(x, y) do {                                         \
  39     if ((y) >= RSSI_LPF_THRESHOLD)                                      \
  40         x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN);      \
  41 } while (0)
  42 #define ATH_EP_RND(x, mul)                                              \
  43         (((x) + ((mul)/2)) / (mul))
  44
  45 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
  46 void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan,
  47                                struct cfg80211_chan_def *chandef);
  48 struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
  49                                                struct ath_hw *ah);
  50 int ath9k_cmn_count_streams(unsigned int chainmask, int max);
  51 void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common,
  52                                   enum ath_stomp_type stomp_type);
  53 void ath9k_cmn_update_txpow(struct ath_hw *ah, u16 cur_txpow,
  54                             u16 new_txpow, u16 *txpower);
  55 void ath9k_cmn_init_crypto(struct ath_hw *ah);