ath9k_htc: Support for AR9271 chipset.
Features: * Station mode * IBSS mode * Monitor mode * Legacy support * HT support * TX/RX 11n Aggregation * HW encryption * LED * Suspend/Resume For more information: http://wireless.kernel.org/en/users/Drivers/ath9k_htc Signed-off-by: Sujith <Sujith.Manoharan@atheros.com> Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com> Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith
John W. Linville
@@ -286,6 +286,427 @@ int ath9k_cmn_padpos(__le16 frame_control)
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}
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EXPORT_SYMBOL(ath9k_cmn_padpos);
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int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb)
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{
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struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
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if (tx_info->control.hw_key) {
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if (tx_info->control.hw_key->alg == ALG_WEP)
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return ATH9K_KEY_TYPE_WEP;
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else if (tx_info->control.hw_key->alg == ALG_TKIP)
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return ATH9K_KEY_TYPE_TKIP;
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else if (tx_info->control.hw_key->alg == ALG_CCMP)
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return ATH9K_KEY_TYPE_AES;
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}
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return ATH9K_KEY_TYPE_CLEAR;
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}
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EXPORT_SYMBOL(ath9k_cmn_get_hw_crypto_keytype);
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/*
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* Calculate the RX filter to be set in the HW.
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*/
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u32 ath9k_cmn_calcrxfilter(struct ieee80211_hw *hw, struct ath_hw *ah,
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unsigned int rxfilter)
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{
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#define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR)
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u32 rfilt;
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rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE)
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| ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
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| ATH9K_RX_FILTER_MCAST;
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/* If not a STA, enable processing of Probe Requests */
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if (ah->opmode != NL80211_IFTYPE_STATION)
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rfilt |= ATH9K_RX_FILTER_PROBEREQ;
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/*
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* Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station
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* mode interface or when in monitor mode. AP mode does not need this
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* since it receives all in-BSS frames anyway.
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*/
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if (((ah->opmode != NL80211_IFTYPE_AP) &&
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(rxfilter & FIF_PROMISC_IN_BSS)) ||
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(ah->opmode == NL80211_IFTYPE_MONITOR))
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rfilt |= ATH9K_RX_FILTER_PROM;
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if (rxfilter & FIF_CONTROL)
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rfilt |= ATH9K_RX_FILTER_CONTROL;
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if ((ah->opmode == NL80211_IFTYPE_STATION) &&
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!(rxfilter & FIF_BCN_PRBRESP_PROMISC))
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rfilt |= ATH9K_RX_FILTER_MYBEACON;
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else
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rfilt |= ATH9K_RX_FILTER_BEACON;
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if ((AR_SREV_9280_10_OR_LATER(ah) ||
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AR_SREV_9285_10_OR_LATER(ah)) &&
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(ah->opmode == NL80211_IFTYPE_AP) &&
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(rxfilter & FIF_PSPOLL))
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rfilt |= ATH9K_RX_FILTER_PSPOLL;
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if (conf_is_ht(&hw->conf))
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rfilt |= ATH9K_RX_FILTER_COMP_BAR;
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return rfilt;
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#undef RX_FILTER_PRESERVE
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}
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EXPORT_SYMBOL(ath9k_cmn_calcrxfilter);
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/*
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* Recv initialization for opmode change.
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*/
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void ath9k_cmn_opmode_init(struct ieee80211_hw *hw, struct ath_hw *ah,
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unsigned int rxfilter)
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{
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struct ath_common *common = ath9k_hw_common(ah);
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u32 rfilt, mfilt[2];
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/* configure rx filter */
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rfilt = ath9k_cmn_calcrxfilter(hw, ah, rxfilter);
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ath9k_hw_setrxfilter(ah, rfilt);
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/* configure bssid mask */
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if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
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ath_hw_setbssidmask(common);
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/* configure operational mode */
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ath9k_hw_setopmode(ah);
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/* Handle any link-level address change. */
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ath9k_hw_setmac(ah, common->macaddr);
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/* calculate and install multicast filter */
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mfilt[0] = mfilt[1] = ~0;
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ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
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}
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EXPORT_SYMBOL(ath9k_cmn_opmode_init);
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static u32 ath9k_get_extchanmode(struct ieee80211_channel *chan,
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enum nl80211_channel_type channel_type)
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{
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u32 chanmode = 0;
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switch (chan->band) {
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case IEEE80211_BAND_2GHZ:
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switch (channel_type) {
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case NL80211_CHAN_NO_HT:
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case NL80211_CHAN_HT20:
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chanmode = CHANNEL_G_HT20;
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break;
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case NL80211_CHAN_HT40PLUS:
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chanmode = CHANNEL_G_HT40PLUS;
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break;
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case NL80211_CHAN_HT40MINUS:
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chanmode = CHANNEL_G_HT40MINUS;
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break;
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}
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break;
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case IEEE80211_BAND_5GHZ:
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switch (channel_type) {
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case NL80211_CHAN_NO_HT:
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case NL80211_CHAN_HT20:
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chanmode = CHANNEL_A_HT20;
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break;
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case NL80211_CHAN_HT40PLUS:
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chanmode = CHANNEL_A_HT40PLUS;
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break;
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case NL80211_CHAN_HT40MINUS:
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chanmode = CHANNEL_A_HT40MINUS;
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break;
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}
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break;
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default:
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break;
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}
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return chanmode;
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}
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/*
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* Update internal channel flags.
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*/
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void ath9k_cmn_update_ichannel(struct ieee80211_hw *hw,
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struct ath9k_channel *ichan)
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{
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struct ieee80211_channel *chan = hw->conf.channel;
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struct ieee80211_conf *conf = &hw->conf;
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ichan->channel = chan->center_freq;
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ichan->chan = chan;
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if (chan->band == IEEE80211_BAND_2GHZ) {
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ichan->chanmode = CHANNEL_G;
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ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
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} else {
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ichan->chanmode = CHANNEL_A;
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ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
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}
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if (conf_is_ht(conf))
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ichan->chanmode = ath9k_get_extchanmode(chan,
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conf->channel_type);
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}
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EXPORT_SYMBOL(ath9k_cmn_update_ichannel);
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/*
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* Get the internal channel reference.
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*/
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struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
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struct ath_hw *ah)
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{
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struct ieee80211_channel *curchan = hw->conf.channel;
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struct ath9k_channel *channel;
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u8 chan_idx;
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chan_idx = curchan->hw_value;
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channel = &ah->channels[chan_idx];
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ath9k_cmn_update_ichannel(hw, channel);
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return channel;
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}
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EXPORT_SYMBOL(ath9k_cmn_get_curchannel);
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static int ath_setkey_tkip(struct ath_common *common, u16 keyix, const u8 *key,
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struct ath9k_keyval *hk, const u8 *addr,
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bool authenticator)
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{
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struct ath_hw *ah = common->ah;
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const u8 *key_rxmic;
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const u8 *key_txmic;
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key_txmic = key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
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key_rxmic = key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
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if (addr == NULL) {
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/*
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* Group key installation - only two key cache entries are used
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* regardless of splitmic capability since group key is only
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* used either for TX or RX.
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*/
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if (authenticator) {
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memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
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memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_mic));
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} else {
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memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
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memcpy(hk->kv_txmic, key_rxmic, sizeof(hk->kv_mic));
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}
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return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr);
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}
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if (!common->splitmic) {
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/* TX and RX keys share the same key cache entry. */
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memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
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memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
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return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr);
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}
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/* Separate key cache entries for TX and RX */
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/* TX key goes at first index, RX key at +32. */
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memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
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if (!ath9k_hw_set_keycache_entry(ah, keyix, hk, NULL)) {
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/* TX MIC entry failed. No need to proceed further */
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ath_print(common, ATH_DBG_FATAL,
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"Setting TX MIC Key Failed\n");
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return 0;
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}
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memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
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/* XXX delete tx key on failure? */
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return ath9k_hw_set_keycache_entry(ah, keyix + 32, hk, addr);
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}
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static int ath_reserve_key_cache_slot_tkip(struct ath_common *common)
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{
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int i;
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for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) {
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if (test_bit(i, common->keymap) ||
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test_bit(i + 64, common->keymap))
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continue; /* At least one part of TKIP key allocated */
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if (common->splitmic &&
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(test_bit(i + 32, common->keymap) ||
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test_bit(i + 64 + 32, common->keymap)))
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continue; /* At least one part of TKIP key allocated */
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/* Found a free slot for a TKIP key */
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return i;
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}
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return -1;
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}
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static int ath_reserve_key_cache_slot(struct ath_common *common)
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{
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int i;
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/* First, try to find slots that would not be available for TKIP. */
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if (common->splitmic) {
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for (i = IEEE80211_WEP_NKID; i < common->keymax / 4; i++) {
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if (!test_bit(i, common->keymap) &&
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(test_bit(i + 32, common->keymap) ||
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test_bit(i + 64, common->keymap) ||
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test_bit(i + 64 + 32, common->keymap)))
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return i;
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if (!test_bit(i + 32, common->keymap) &&
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(test_bit(i, common->keymap) ||
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test_bit(i + 64, common->keymap) ||
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test_bit(i + 64 + 32, common->keymap)))
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return i + 32;
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if (!test_bit(i + 64, common->keymap) &&
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(test_bit(i , common->keymap) ||
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test_bit(i + 32, common->keymap) ||
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test_bit(i + 64 + 32, common->keymap)))
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return i + 64;
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if (!test_bit(i + 64 + 32, common->keymap) &&
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(test_bit(i, common->keymap) ||
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test_bit(i + 32, common->keymap) ||
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test_bit(i + 64, common->keymap)))
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return i + 64 + 32;
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}
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} else {
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for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) {
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if (!test_bit(i, common->keymap) &&
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test_bit(i + 64, common->keymap))
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return i;
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if (test_bit(i, common->keymap) &&
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!test_bit(i + 64, common->keymap))
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return i + 64;
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}
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}
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/* No partially used TKIP slots, pick any available slot */
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for (i = IEEE80211_WEP_NKID; i < common->keymax; i++) {
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/* Do not allow slots that could be needed for TKIP group keys
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* to be used. This limitation could be removed if we know that
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* TKIP will not be used. */
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if (i >= 64 && i < 64 + IEEE80211_WEP_NKID)
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continue;
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if (common->splitmic) {
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if (i >= 32 && i < 32 + IEEE80211_WEP_NKID)
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continue;
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if (i >= 64 + 32 && i < 64 + 32 + IEEE80211_WEP_NKID)
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continue;
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}
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if (!test_bit(i, common->keymap))
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return i; /* Found a free slot for a key */
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}
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/* No free slot found */
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return -1;
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}
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/*
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* Configure encryption in the HW.
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*/
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int ath9k_cmn_key_config(struct ath_common *common,
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struct ieee80211_vif *vif,
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struct ieee80211_sta *sta,
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struct ieee80211_key_conf *key)
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{
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struct ath_hw *ah = common->ah;
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struct ath9k_keyval hk;
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const u8 *mac = NULL;
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int ret = 0;
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int idx;
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memset(&hk, 0, sizeof(hk));
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switch (key->alg) {
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case ALG_WEP:
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hk.kv_type = ATH9K_CIPHER_WEP;
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break;
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case ALG_TKIP:
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hk.kv_type = ATH9K_CIPHER_TKIP;
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break;
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case ALG_CCMP:
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hk.kv_type = ATH9K_CIPHER_AES_CCM;
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break;
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default:
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return -EOPNOTSUPP;
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}
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hk.kv_len = key->keylen;
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memcpy(hk.kv_val, key->key, key->keylen);
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if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
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/* For now, use the default keys for broadcast keys. This may
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* need to change with virtual interfaces. */
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idx = key->keyidx;
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} else if (key->keyidx) {
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if (WARN_ON(!sta))
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return -EOPNOTSUPP;
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mac = sta->addr;
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if (vif->type != NL80211_IFTYPE_AP) {
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/* Only keyidx 0 should be used with unicast key, but
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* allow this for client mode for now. */
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idx = key->keyidx;
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} else
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return -EIO;
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} else {
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if (WARN_ON(!sta))
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return -EOPNOTSUPP;
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mac = sta->addr;
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if (key->alg == ALG_TKIP)
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idx = ath_reserve_key_cache_slot_tkip(common);
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else
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idx = ath_reserve_key_cache_slot(common);
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if (idx < 0)
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return -ENOSPC; /* no free key cache entries */
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}
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if (key->alg == ALG_TKIP)
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ret = ath_setkey_tkip(common, idx, key->key, &hk, mac,
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vif->type == NL80211_IFTYPE_AP);
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else
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ret = ath9k_hw_set_keycache_entry(ah, idx, &hk, mac);
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if (!ret)
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return -EIO;
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set_bit(idx, common->keymap);
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if (key->alg == ALG_TKIP) {
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set_bit(idx + 64, common->keymap);
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if (common->splitmic) {
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set_bit(idx + 32, common->keymap);
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set_bit(idx + 64 + 32, common->keymap);
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}
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}
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return idx;
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}
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EXPORT_SYMBOL(ath9k_cmn_key_config);
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/*
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* Delete Key.
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*/
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void ath9k_cmn_key_delete(struct ath_common *common,
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struct ieee80211_key_conf *key)
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{
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struct ath_hw *ah = common->ah;
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ath9k_hw_keyreset(ah, key->hw_key_idx);
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if (key->hw_key_idx < IEEE80211_WEP_NKID)
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return;
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clear_bit(key->hw_key_idx, common->keymap);
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if (key->alg != ALG_TKIP)
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return;
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clear_bit(key->hw_key_idx + 64, common->keymap);
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if (common->splitmic) {
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ath9k_hw_keyreset(ah, key->hw_key_idx + 32);
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clear_bit(key->hw_key_idx + 32, common->keymap);
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clear_bit(key->hw_key_idx + 64 + 32, common->keymap);
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}
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}
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EXPORT_SYMBOL(ath9k_cmn_key_delete);
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static int __init ath9k_cmn_init(void)
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{
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return 0;
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