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 #include "common-spectral.h" 28 29 /* Common header for Atheros 802.11n base driver cores */ 30 31 #define WME_BA_BMP_SIZE 64 32 #define WME_MAX_BA WME_BA_BMP_SIZE 33 #define ATH_TID_MAX_BUFS (2 * WME_MAX_BA) 34 35 #define ATH_RSSI_DUMMY_MARKER 127 36 #define ATH_RSSI_LPF_LEN 10 37 #define RSSI_LPF_THRESHOLD -20 38 #define ATH_RSSI_EP_MULTIPLIER (1<<7) 39 #define ATH_EP_MUL(x, mul) ((x) * (mul)) 40 #define ATH_RSSI_IN(x) (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER)) 41 #define ATH_LPF_RSSI(x, y, len) \ 42 ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y)) 43 #define ATH_RSSI_LPF(x, y) do { \ 44 if ((y) >= RSSI_LPF_THRESHOLD) \ 45 x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN); \ 46 } while (0) 47 #define ATH_EP_RND(x, mul) \ 48 (((x) + ((mul)/2)) / (mul)) 49 50 #define IEEE80211_MS_TO_TU(x) (((x) * 1000) / 1024) 51 52 struct ath_beacon_config { 53 struct ieee80211_vif *main_vif; 54 int beacon_interval; 55 u16 dtim_period; 56 u16 bmiss_timeout; 57 u8 dtim_count; 58 u8 enable_beacon; 59 bool ibss_creator; 60 u32 nexttbtt; 61 u32 intval; 62 }; 63 64 bool ath9k_cmn_rx_accept(struct ath_common *common, 65 struct ieee80211_hdr *hdr, 66 struct ieee80211_rx_status *rxs, 67 struct ath_rx_status *rx_stats, 68 bool *decrypt_error, 69 unsigned int rxfilter); 70 void ath9k_cmn_rx_skb_postprocess(struct ath_common *common, 71 struct sk_buff *skb, 72 struct ath_rx_status *rx_stats, 73 struct ieee80211_rx_status *rxs, 74 bool decrypt_error); 75 int ath9k_cmn_process_rate(struct ath_common *common, 76 struct ieee80211_hw *hw, 77 struct ath_rx_status *rx_stats, 78 struct ieee80211_rx_status *rxs); 79 void ath9k_cmn_process_rssi(struct ath_common *common, 80 struct ieee80211_hw *hw, 81 struct ath_rx_status *rx_stats, 82 struct ieee80211_rx_status *rxs); 83 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb); 84 struct ath9k_channel *ath9k_cmn_get_channel(struct ieee80211_hw *hw, 85 struct ath_hw *ah, 86 struct cfg80211_chan_def *chandef); 87 int ath9k_cmn_count_streams(unsigned int chainmask, int max); 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