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
52struct 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
64bool 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);
70void 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);
75int 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);
79void 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);
83int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
84struct ath9k_channel *ath9k_cmn_get_channel(struct ieee80211_hw *hw,
85 struct ath_hw *ah,
86 struct cfg80211_chan_def *chandef);
87int ath9k_cmn_count_streams(unsigned int chainmask, int max);
88void ath9k_cmn_update_txpow(struct ath_hw *ah, u16 cur_txpow,
89 u16 new_txpow, u16 *txpower);
90void ath9k_cmn_init_crypto(struct ath_hw *ah);
91

source code of linux/drivers/net/wireless/ath/ath9k/common.h