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 /* Common header for Atheros 802.11n base driver cores */
25 
26 #define WME_NUM_TID             16
27 #define WME_BA_BMP_SIZE         64
28 #define WME_MAX_BA              WME_BA_BMP_SIZE
29 #define ATH_TID_MAX_BUFS        (2 * WME_MAX_BA)
30 
31 /* These must match mac80211 skb queue mapping numbers */
32 #define WME_AC_VO   0
33 #define WME_AC_VI   1
34 #define WME_AC_BE   2
35 #define WME_AC_BK   3
36 #define WME_NUM_AC  4
37 
38 #define ATH_RSSI_DUMMY_MARKER   127
39 #define ATH_RSSI_LPF_LEN 		10
40 #define RSSI_LPF_THRESHOLD		-20
41 #define ATH_RSSI_EP_MULTIPLIER     (1<<7)
42 #define ATH_EP_MUL(x, mul)         ((x) * (mul))
43 #define ATH_RSSI_IN(x)             (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
44 #define ATH_LPF_RSSI(x, y, len) \
45     ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
46 #define ATH_RSSI_LPF(x, y) do {                     			\
47     if ((y) >= RSSI_LPF_THRESHOLD)                         		\
48 	x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN);  	\
49 } while (0)
50 #define ATH_EP_RND(x, mul) 						\
51 	((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
52 
53 int ath9k_cmn_padpos(__le16 frame_control);
54 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
55 void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan,
56 			       struct ieee80211_channel *chan,
57 			       enum nl80211_channel_type channel_type);
58 struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
59 					       struct ath_hw *ah);
60 int ath9k_cmn_count_streams(unsigned int chainmask, int max);
61 void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common,
62 				  enum ath_stomp_type stomp_type);
63 void ath9k_cmn_update_txpow(struct ath_hw *ah, u16 cur_txpow,
64 			    u16 new_txpow, u16 *txpower);
65 void ath9k_cmn_init_crypto(struct ath_hw *ah);
66