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 #include "common-init.h" 25 #include "common-beacon.h" 26 #include "common-debug.h" 27 28 /* Common header for Atheros 802.11n base driver cores */ 29 30 #define WME_BA_BMP_SIZE 64 31 #define WME_MAX_BA WME_BA_BMP_SIZE 32 #define ATH_TID_MAX_BUFS (2 * WME_MAX_BA) 33 34 #define ATH_RSSI_DUMMY_MARKER 127 35 #define ATH_RSSI_LPF_LEN 10 36 #define RSSI_LPF_THRESHOLD -20 37 #define ATH_RSSI_EP_MULTIPLIER (1<<7) 38 #define ATH_EP_MUL(x, mul) ((x) * (mul)) 39 #define ATH_RSSI_IN(x) (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER)) 40 #define ATH_LPF_RSSI(x, y, len) \ 41 ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y)) 42 #define ATH_RSSI_LPF(x, y) do { \ 43 if ((y) >= RSSI_LPF_THRESHOLD) \ 44 x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN); \ 45 } while (0) 46 #define ATH_EP_RND(x, mul) \ 47 (((x) + ((mul)/2)) / (mul)) 48 49 #define IEEE80211_MS_TO_TU(x) (((x) * 1000) / 1024) 50 51 struct ath_beacon_config { 52 int beacon_interval; 53 u16 dtim_period; 54 u16 bmiss_timeout; 55 u8 dtim_count; 56 bool enable_beacon; 57 bool ibss_creator; 58 u32 nexttbtt; 59 u32 intval; 60 }; 61 62 bool ath9k_cmn_rx_accept(struct ath_common *common, 63 struct ieee80211_hdr *hdr, 64 struct ieee80211_rx_status *rxs, 65 struct ath_rx_status *rx_stats, 66 bool *decrypt_error, 67 unsigned int rxfilter); 68 void ath9k_cmn_rx_skb_postprocess(struct ath_common *common, 69 struct sk_buff *skb, 70 struct ath_rx_status *rx_stats, 71 struct ieee80211_rx_status *rxs, 72 bool decrypt_error); 73 int ath9k_cmn_process_rate(struct ath_common *common, 74 struct ieee80211_hw *hw, 75 struct ath_rx_status *rx_stats, 76 struct ieee80211_rx_status *rxs); 77 void ath9k_cmn_process_rssi(struct ath_common *common, 78 struct ieee80211_hw *hw, 79 struct ath_rx_status *rx_stats, 80 struct ieee80211_rx_status *rxs); 81 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb); 82 struct ath9k_channel *ath9k_cmn_get_channel(struct ieee80211_hw *hw, 83 struct ath_hw *ah, 84 struct cfg80211_chan_def *chandef); 85 int ath9k_cmn_count_streams(unsigned int chainmask, int max); 86 void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common, 87 enum ath_stomp_type stomp_type); 88 void ath9k_cmn_update_txpow(struct ath_hw *ah, u16 cur_txpow, 89 u16 new_txpow, u16 *txpower); 90 void ath9k_cmn_init_crypto(struct ath_hw *ah); 91