Commit | Line | Data |
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db86f07e | 1 | /* |
5b68138e | 2 | * Copyright (c) 2009-2011 Atheros Communications Inc. |
db86f07e LR |
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 | /* | |
18 | * Module for common driver code between ath9k and ath9k_htc | |
19 | */ | |
20 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
23 | ||
24 | #include "common.h" | |
25 | ||
26 | MODULE_AUTHOR("Atheros Communications"); | |
27 | MODULE_DESCRIPTION("Shared library for Atheros wireless 802.11n LAN cards."); | |
28 | MODULE_LICENSE("Dual BSD/GPL"); | |
29 | ||
1bc14880 BP |
30 | int ath9k_cmn_padpos(__le16 frame_control) |
31 | { | |
32 | int padpos = 24; | |
33 | if (ieee80211_has_a4(frame_control)) { | |
34 | padpos += ETH_ALEN; | |
35 | } | |
36 | if (ieee80211_is_data_qos(frame_control)) { | |
37 | padpos += IEEE80211_QOS_CTL_LEN; | |
38 | } | |
39 | ||
40 | return padpos; | |
41 | } | |
42 | EXPORT_SYMBOL(ath9k_cmn_padpos); | |
43 | ||
fb9987d0 S |
44 | int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb) |
45 | { | |
46 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
47 | ||
48 | if (tx_info->control.hw_key) { | |
97359d12 JB |
49 | switch (tx_info->control.hw_key->cipher) { |
50 | case WLAN_CIPHER_SUITE_WEP40: | |
51 | case WLAN_CIPHER_SUITE_WEP104: | |
fb9987d0 | 52 | return ATH9K_KEY_TYPE_WEP; |
97359d12 | 53 | case WLAN_CIPHER_SUITE_TKIP: |
fb9987d0 | 54 | return ATH9K_KEY_TYPE_TKIP; |
97359d12 | 55 | case WLAN_CIPHER_SUITE_CCMP: |
fb9987d0 | 56 | return ATH9K_KEY_TYPE_AES; |
97359d12 JB |
57 | default: |
58 | break; | |
59 | } | |
fb9987d0 S |
60 | } |
61 | ||
62 | return ATH9K_KEY_TYPE_CLEAR; | |
63 | } | |
64 | EXPORT_SYMBOL(ath9k_cmn_get_hw_crypto_keytype); | |
65 | ||
fb9987d0 S |
66 | static u32 ath9k_get_extchanmode(struct ieee80211_channel *chan, |
67 | enum nl80211_channel_type channel_type) | |
68 | { | |
69 | u32 chanmode = 0; | |
70 | ||
71 | switch (chan->band) { | |
72 | case IEEE80211_BAND_2GHZ: | |
73 | switch (channel_type) { | |
74 | case NL80211_CHAN_NO_HT: | |
75 | case NL80211_CHAN_HT20: | |
76 | chanmode = CHANNEL_G_HT20; | |
77 | break; | |
78 | case NL80211_CHAN_HT40PLUS: | |
79 | chanmode = CHANNEL_G_HT40PLUS; | |
80 | break; | |
81 | case NL80211_CHAN_HT40MINUS: | |
82 | chanmode = CHANNEL_G_HT40MINUS; | |
83 | break; | |
84 | } | |
85 | break; | |
86 | case IEEE80211_BAND_5GHZ: | |
87 | switch (channel_type) { | |
88 | case NL80211_CHAN_NO_HT: | |
89 | case NL80211_CHAN_HT20: | |
90 | chanmode = CHANNEL_A_HT20; | |
91 | break; | |
92 | case NL80211_CHAN_HT40PLUS: | |
93 | chanmode = CHANNEL_A_HT40PLUS; | |
94 | break; | |
95 | case NL80211_CHAN_HT40MINUS: | |
96 | chanmode = CHANNEL_A_HT40MINUS; | |
97 | break; | |
98 | } | |
99 | break; | |
100 | default: | |
101 | break; | |
102 | } | |
103 | ||
104 | return chanmode; | |
105 | } | |
106 | ||
107 | /* | |
108 | * Update internal channel flags. | |
109 | */ | |
babcbc29 FF |
110 | void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan, |
111 | struct ieee80211_channel *chan, | |
112 | enum nl80211_channel_type channel_type) | |
fb9987d0 | 113 | { |
fb9987d0 S |
114 | ichan->channel = chan->center_freq; |
115 | ichan->chan = chan; | |
116 | ||
117 | if (chan->band == IEEE80211_BAND_2GHZ) { | |
118 | ichan->chanmode = CHANNEL_G; | |
b64c6a3d | 119 | ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM; |
fb9987d0 S |
120 | } else { |
121 | ichan->chanmode = CHANNEL_A; | |
122 | ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM; | |
123 | } | |
124 | ||
babcbc29 FF |
125 | if (channel_type != NL80211_CHAN_NO_HT) |
126 | ichan->chanmode = ath9k_get_extchanmode(chan, channel_type); | |
fb9987d0 S |
127 | } |
128 | EXPORT_SYMBOL(ath9k_cmn_update_ichannel); | |
129 | ||
130 | /* | |
131 | * Get the internal channel reference. | |
132 | */ | |
133 | struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw, | |
134 | struct ath_hw *ah) | |
135 | { | |
675a0b04 | 136 | struct ieee80211_channel *curchan = hw->conf.chandef.chan; |
fb9987d0 S |
137 | struct ath9k_channel *channel; |
138 | u8 chan_idx; | |
139 | ||
140 | chan_idx = curchan->hw_value; | |
141 | channel = &ah->channels[chan_idx]; | |
675a0b04 KB |
142 | ath9k_cmn_update_ichannel(channel, curchan, |
143 | cfg80211_get_chandef_type(&hw->conf.chandef)); | |
fb9987d0 S |
144 | |
145 | return channel; | |
146 | } | |
147 | EXPORT_SYMBOL(ath9k_cmn_get_curchannel); | |
148 | ||
61389f3e S |
149 | int ath9k_cmn_count_streams(unsigned int chainmask, int max) |
150 | { | |
151 | int streams = 0; | |
152 | ||
153 | do { | |
154 | if (++streams == max) | |
155 | break; | |
156 | } while ((chainmask = chainmask & (chainmask - 1))); | |
157 | ||
158 | return streams; | |
159 | } | |
160 | EXPORT_SYMBOL(ath9k_cmn_count_streams); | |
161 | ||
5048e8c3 RM |
162 | void ath9k_cmn_update_txpow(struct ath_hw *ah, u16 cur_txpow, |
163 | u16 new_txpow, u16 *txpower) | |
164 | { | |
ca2c68cc FF |
165 | struct ath_regulatory *reg = ath9k_hw_regulatory(ah); |
166 | ||
167 | if (reg->power_limit != new_txpow) { | |
5048e8c3 RM |
168 | ath9k_hw_set_txpowerlimit(ah, new_txpow, false); |
169 | /* read back in case value is clamped */ | |
ca2c68cc | 170 | *txpower = reg->max_power_level; |
5048e8c3 RM |
171 | } |
172 | } | |
173 | EXPORT_SYMBOL(ath9k_cmn_update_txpow); | |
174 | ||
f82b4bde RM |
175 | void ath9k_cmn_init_crypto(struct ath_hw *ah) |
176 | { | |
177 | struct ath_common *common = ath9k_hw_common(ah); | |
178 | int i = 0; | |
179 | ||
180 | /* Get the hardware key cache size. */ | |
181 | common->keymax = AR_KEYTABLE_SIZE; | |
182 | ||
183 | /* | |
184 | * Check whether the separate key cache entries | |
185 | * are required to handle both tx+rx MIC keys. | |
186 | * With split mic keys the number of stations is limited | |
187 | * to 27 otherwise 59. | |
188 | */ | |
189 | if (ah->misc_mode & AR_PCU_MIC_NEW_LOC_ENA) | |
190 | common->crypt_caps |= ATH_CRYPT_CAP_MIC_COMBINED; | |
191 | ||
192 | /* | |
193 | * Reset the key cache since some parts do not | |
194 | * reset the contents on initial power up. | |
195 | */ | |
196 | for (i = 0; i < common->keymax; i++) | |
197 | ath_hw_keyreset(common, (u16) i); | |
198 | } | |
199 | EXPORT_SYMBOL(ath9k_cmn_init_crypto); | |
200 | ||
db86f07e LR |
201 | static int __init ath9k_cmn_init(void) |
202 | { | |
203 | return 0; | |
204 | } | |
205 | module_init(ath9k_cmn_init); | |
206 | ||
207 | static void __exit ath9k_cmn_exit(void) | |
208 | { | |
209 | return; | |
210 | } | |
211 | module_exit(ath9k_cmn_exit); |