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

   1 /*
   2  * Copyright (c) 2009 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 IEEE80211_WEP_NKID 4
  27
  28 #define WME_NUM_TID             16
  29 #define WME_BA_BMP_SIZE         64
  30 #define WME_MAX_BA              WME_BA_BMP_SIZE
  31 #define ATH_TID_MAX_BUFS        (2 * WME_MAX_BA)
  32
  33 /* These must match mac80211 skb queue mapping numbers */
  34 #define WME_AC_VO   0
  35 #define WME_AC_VI   1
  36 #define WME_AC_BE   2
  37 #define WME_AC_BK   3
  38 #define WME_NUM_AC  4
  39
  40 #define ATH_RSSI_DUMMY_MARKER   0x127
  41 #define ATH_RSSI_LPF_LEN                10
  42 #define RSSI_LPF_THRESHOLD              -20
  43 #define ATH_RSSI_EP_MULTIPLIER     (1<<7)
  44 #define ATH_EP_MUL(x, mul)         ((x) * (mul))
  45 #define ATH_RSSI_IN(x)             (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
  46 #define ATH_LPF_RSSI(x, y, len) \
  47     ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
  48 #define ATH_RSSI_LPF(x, y) do {                                         \
  49     if ((y) >= RSSI_LPF_THRESHOLD)                                      \
  50         x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN);      \
  51 } while (0)
  52 #define ATH_EP_RND(x, mul)                                              \
  53         ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
  54
  55 /* Defines the BT AR_BT_COEX_WGHT used */
  56 enum ath_stomp_type {
  57         ATH_BTCOEX_NO_STOMP,
  58         ATH_BTCOEX_STOMP_ALL,
  59         ATH_BTCOEX_STOMP_LOW,
  60         ATH_BTCOEX_STOMP_NONE
  61 };
  62
  63 int ath9k_cmn_padpos(__le16 frame_control);
  64 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
  65 void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan,
  66                                struct ieee80211_channel *chan,
  67                                enum nl80211_channel_type channel_type);
  68 struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
  69                                                struct ath_hw *ah);
  70 int ath9k_cmn_count_streams(unsigned int chainmask, int max);
  71 void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common,
  72                                   enum ath_stomp_type stomp_type);