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	int beacon_interval;
54	u16 dtim_period;
55	u16 bmiss_timeout;
56	u8 dtim_count;
57	u8 enable_beacon;
58	bool ibss_creator;
59	u32 nexttbtt;
60	u32 intval;
61};
62
63bool ath9k_cmn_rx_accept(struct ath_common *common,
64			 struct ieee80211_hdr *hdr,
65			 struct ieee80211_rx_status *rxs,
66			 struct ath_rx_status *rx_stats,
67			 bool *decrypt_error,
68			 unsigned int rxfilter);
69void ath9k_cmn_rx_skb_postprocess(struct ath_common *common,
70				  struct sk_buff *skb,
71				  struct ath_rx_status *rx_stats,
72				  struct ieee80211_rx_status *rxs,
73				  bool decrypt_error);
74int ath9k_cmn_process_rate(struct ath_common *common,
75			   struct ieee80211_hw *hw,
76			   struct ath_rx_status *rx_stats,
77			   struct ieee80211_rx_status *rxs);
78void ath9k_cmn_process_rssi(struct ath_common *common,
79			    struct ieee80211_hw *hw,
80			    struct ath_rx_status *rx_stats,
81			    struct ieee80211_rx_status *rxs);
82int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
83struct ath9k_channel *ath9k_cmn_get_channel(struct ieee80211_hw *hw,
84					    struct ath_hw *ah,
85					    struct cfg80211_chan_def *chandef);
86int ath9k_cmn_count_streams(unsigned int chainmask, int max);
87void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common,
88				  enum ath_stomp_type stomp_type);
89void ath9k_cmn_update_txpow(struct ath_hw *ah, u16 cur_txpow,
90			    u16 new_txpow, u16 *txpower);
91void ath9k_cmn_init_crypto(struct ath_hw *ah);
92