| /* |
| * Copyright (c) 2009-2011 Atheros Communications Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /* |
| * Module for common driver code between ath9k and ath9k_htc |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| |
| #include "common.h" |
| |
| MODULE_AUTHOR("Atheros Communications"); |
| MODULE_DESCRIPTION("Shared library for Atheros wireless 802.11n LAN cards."); |
| MODULE_LICENSE("Dual BSD/GPL"); |
| |
| int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb) |
| { |
| struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| |
| if (tx_info->control.hw_key) { |
| switch (tx_info->control.hw_key->cipher) { |
| case WLAN_CIPHER_SUITE_WEP40: |
| case WLAN_CIPHER_SUITE_WEP104: |
| return ATH9K_KEY_TYPE_WEP; |
| case WLAN_CIPHER_SUITE_TKIP: |
| return ATH9K_KEY_TYPE_TKIP; |
| case WLAN_CIPHER_SUITE_CCMP: |
| return ATH9K_KEY_TYPE_AES; |
| default: |
| break; |
| } |
| } |
| |
| return ATH9K_KEY_TYPE_CLEAR; |
| } |
| EXPORT_SYMBOL(ath9k_cmn_get_hw_crypto_keytype); |
| |
| /* |
| * Update internal channel flags. |
| */ |
| static void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan, |
| struct cfg80211_chan_def *chandef) |
| { |
| struct ieee80211_channel *chan = chandef->chan; |
| u16 flags = 0; |
| |
| ichan->channel = chan->center_freq; |
| ichan->chan = chan; |
| |
| if (chan->band == IEEE80211_BAND_5GHZ) |
| flags |= CHANNEL_5GHZ; |
| |
| switch (chandef->width) { |
| case NL80211_CHAN_WIDTH_5: |
| flags |= CHANNEL_QUARTER; |
| break; |
| case NL80211_CHAN_WIDTH_10: |
| flags |= CHANNEL_HALF; |
| break; |
| case NL80211_CHAN_WIDTH_20_NOHT: |
| break; |
| case NL80211_CHAN_WIDTH_20: |
| flags |= CHANNEL_HT; |
| break; |
| case NL80211_CHAN_WIDTH_40: |
| if (chandef->center_freq1 > chandef->chan->center_freq) |
| flags |= CHANNEL_HT40PLUS | CHANNEL_HT; |
| else |
| flags |= CHANNEL_HT40MINUS | CHANNEL_HT; |
| break; |
| default: |
| WARN_ON(1); |
| } |
| |
| ichan->channelFlags = flags; |
| } |
| |
| /* |
| * Get the internal channel reference. |
| */ |
| struct ath9k_channel *ath9k_cmn_get_channel(struct ieee80211_hw *hw, |
| struct ath_hw *ah, |
| struct cfg80211_chan_def *chandef) |
| { |
| struct ieee80211_channel *curchan = chandef->chan; |
| struct ath9k_channel *channel; |
| |
| channel = &ah->channels[curchan->hw_value]; |
| ath9k_cmn_update_ichannel(channel, chandef); |
| |
| return channel; |
| } |
| EXPORT_SYMBOL(ath9k_cmn_get_channel); |
| |
| int ath9k_cmn_count_streams(unsigned int chainmask, int max) |
| { |
| int streams = 0; |
| |
| do { |
| if (++streams == max) |
| break; |
| } while ((chainmask = chainmask & (chainmask - 1))); |
| |
| return streams; |
| } |
| EXPORT_SYMBOL(ath9k_cmn_count_streams); |
| |
| void ath9k_cmn_update_txpow(struct ath_hw *ah, u16 cur_txpow, |
| u16 new_txpow, u16 *txpower) |
| { |
| struct ath_regulatory *reg = ath9k_hw_regulatory(ah); |
| |
| if (reg->power_limit != new_txpow) { |
| ath9k_hw_set_txpowerlimit(ah, new_txpow, false); |
| /* read back in case value is clamped */ |
| *txpower = reg->max_power_level; |
| } |
| } |
| EXPORT_SYMBOL(ath9k_cmn_update_txpow); |
| |
| void ath9k_cmn_init_crypto(struct ath_hw *ah) |
| { |
| struct ath_common *common = ath9k_hw_common(ah); |
| int i = 0; |
| |
| /* Get the hardware key cache size. */ |
| common->keymax = AR_KEYTABLE_SIZE; |
| |
| /* |
| * Check whether the separate key cache entries |
| * are required to handle both tx+rx MIC keys. |
| * With split mic keys the number of stations is limited |
| * to 27 otherwise 59. |
| */ |
| if (ah->misc_mode & AR_PCU_MIC_NEW_LOC_ENA) |
| common->crypt_caps |= ATH_CRYPT_CAP_MIC_COMBINED; |
| |
| /* |
| * Reset the key cache since some parts do not |
| * reset the contents on initial power up. |
| */ |
| for (i = 0; i < common->keymax; i++) |
| ath_hw_keyreset(common, (u16) i); |
| } |
| EXPORT_SYMBOL(ath9k_cmn_init_crypto); |
| |
| static int __init ath9k_cmn_init(void) |
| { |
| return 0; |
| } |
| module_init(ath9k_cmn_init); |
| |
| static void __exit ath9k_cmn_exit(void) |
| { |
| return; |
| } |
| module_exit(ath9k_cmn_exit); |