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>
diff --git a/drivers/net/wireless/ath/ath9k/common.c b/drivers/net/wireless/ath/ath9k/common.c
index 4d775ae..7902d28 100644
--- a/drivers/net/wireless/ath/ath9k/common.c
+++ b/drivers/net/wireless/ath/ath9k/common.c
@@ -286,6 +286,427 @@
}
EXPORT_SYMBOL(ath9k_cmn_padpos);
+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) {
+ if (tx_info->control.hw_key->alg == ALG_WEP)
+ return ATH9K_KEY_TYPE_WEP;
+ else if (tx_info->control.hw_key->alg == ALG_TKIP)
+ return ATH9K_KEY_TYPE_TKIP;
+ else if (tx_info->control.hw_key->alg == ALG_CCMP)
+ return ATH9K_KEY_TYPE_AES;
+ }
+
+ return ATH9K_KEY_TYPE_CLEAR;
+}
+EXPORT_SYMBOL(ath9k_cmn_get_hw_crypto_keytype);
+
+/*
+ * Calculate the RX filter to be set in the HW.
+ */
+u32 ath9k_cmn_calcrxfilter(struct ieee80211_hw *hw, struct ath_hw *ah,
+ unsigned int rxfilter)
+{
+#define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR)
+
+ u32 rfilt;
+
+ rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE)
+ | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
+ | ATH9K_RX_FILTER_MCAST;
+
+ /* If not a STA, enable processing of Probe Requests */
+ if (ah->opmode != NL80211_IFTYPE_STATION)
+ rfilt |= ATH9K_RX_FILTER_PROBEREQ;
+
+ /*
+ * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station
+ * mode interface or when in monitor mode. AP mode does not need this
+ * since it receives all in-BSS frames anyway.
+ */
+ if (((ah->opmode != NL80211_IFTYPE_AP) &&
+ (rxfilter & FIF_PROMISC_IN_BSS)) ||
+ (ah->opmode == NL80211_IFTYPE_MONITOR))
+ rfilt |= ATH9K_RX_FILTER_PROM;
+
+ if (rxfilter & FIF_CONTROL)
+ rfilt |= ATH9K_RX_FILTER_CONTROL;
+
+ if ((ah->opmode == NL80211_IFTYPE_STATION) &&
+ !(rxfilter & FIF_BCN_PRBRESP_PROMISC))
+ rfilt |= ATH9K_RX_FILTER_MYBEACON;
+ else
+ rfilt |= ATH9K_RX_FILTER_BEACON;
+
+ if ((AR_SREV_9280_10_OR_LATER(ah) ||
+ AR_SREV_9285_10_OR_LATER(ah)) &&
+ (ah->opmode == NL80211_IFTYPE_AP) &&
+ (rxfilter & FIF_PSPOLL))
+ rfilt |= ATH9K_RX_FILTER_PSPOLL;
+
+ if (conf_is_ht(&hw->conf))
+ rfilt |= ATH9K_RX_FILTER_COMP_BAR;
+
+ return rfilt;
+
+#undef RX_FILTER_PRESERVE
+}
+EXPORT_SYMBOL(ath9k_cmn_calcrxfilter);
+
+/*
+ * Recv initialization for opmode change.
+ */
+void ath9k_cmn_opmode_init(struct ieee80211_hw *hw, struct ath_hw *ah,
+ unsigned int rxfilter)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+
+ u32 rfilt, mfilt[2];
+
+ /* configure rx filter */
+ rfilt = ath9k_cmn_calcrxfilter(hw, ah, rxfilter);
+ ath9k_hw_setrxfilter(ah, rfilt);
+
+ /* configure bssid mask */
+ if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
+ ath_hw_setbssidmask(common);
+
+ /* configure operational mode */
+ ath9k_hw_setopmode(ah);
+
+ /* Handle any link-level address change. */
+ ath9k_hw_setmac(ah, common->macaddr);
+
+ /* calculate and install multicast filter */
+ mfilt[0] = mfilt[1] = ~0;
+ ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
+}
+EXPORT_SYMBOL(ath9k_cmn_opmode_init);
+
+static u32 ath9k_get_extchanmode(struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type)
+{
+ u32 chanmode = 0;
+
+ switch (chan->band) {
+ case IEEE80211_BAND_2GHZ:
+ switch (channel_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ chanmode = CHANNEL_G_HT20;
+ break;
+ case NL80211_CHAN_HT40PLUS:
+ chanmode = CHANNEL_G_HT40PLUS;
+ break;
+ case NL80211_CHAN_HT40MINUS:
+ chanmode = CHANNEL_G_HT40MINUS;
+ break;
+ }
+ break;
+ case IEEE80211_BAND_5GHZ:
+ switch (channel_type) {
+ case NL80211_CHAN_NO_HT:
+ case NL80211_CHAN_HT20:
+ chanmode = CHANNEL_A_HT20;
+ break;
+ case NL80211_CHAN_HT40PLUS:
+ chanmode = CHANNEL_A_HT40PLUS;
+ break;
+ case NL80211_CHAN_HT40MINUS:
+ chanmode = CHANNEL_A_HT40MINUS;
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return chanmode;
+}
+
+/*
+ * Update internal channel flags.
+ */
+void ath9k_cmn_update_ichannel(struct ieee80211_hw *hw,
+ struct ath9k_channel *ichan)
+{
+ struct ieee80211_channel *chan = hw->conf.channel;
+ struct ieee80211_conf *conf = &hw->conf;
+
+ ichan->channel = chan->center_freq;
+ ichan->chan = chan;
+
+ if (chan->band == IEEE80211_BAND_2GHZ) {
+ ichan->chanmode = CHANNEL_G;
+ ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
+ } else {
+ ichan->chanmode = CHANNEL_A;
+ ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
+ }
+
+ if (conf_is_ht(conf))
+ ichan->chanmode = ath9k_get_extchanmode(chan,
+ conf->channel_type);
+}
+EXPORT_SYMBOL(ath9k_cmn_update_ichannel);
+
+/*
+ * Get the internal channel reference.
+ */
+struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
+ struct ath_hw *ah)
+{
+ struct ieee80211_channel *curchan = hw->conf.channel;
+ struct ath9k_channel *channel;
+ u8 chan_idx;
+
+ chan_idx = curchan->hw_value;
+ channel = &ah->channels[chan_idx];
+ ath9k_cmn_update_ichannel(hw, channel);
+
+ return channel;
+}
+EXPORT_SYMBOL(ath9k_cmn_get_curchannel);
+
+static int ath_setkey_tkip(struct ath_common *common, u16 keyix, const u8 *key,
+ struct ath9k_keyval *hk, const u8 *addr,
+ bool authenticator)
+{
+ struct ath_hw *ah = common->ah;
+ const u8 *key_rxmic;
+ const u8 *key_txmic;
+
+ key_txmic = key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
+ key_rxmic = key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
+
+ if (addr == NULL) {
+ /*
+ * Group key installation - only two key cache entries are used
+ * regardless of splitmic capability since group key is only
+ * used either for TX or RX.
+ */
+ if (authenticator) {
+ memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
+ memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_mic));
+ } else {
+ memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
+ memcpy(hk->kv_txmic, key_rxmic, sizeof(hk->kv_mic));
+ }
+ return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr);
+ }
+ if (!common->splitmic) {
+ /* TX and RX keys share the same key cache entry. */
+ memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
+ memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
+ return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr);
+ }
+
+ /* Separate key cache entries for TX and RX */
+
+ /* TX key goes at first index, RX key at +32. */
+ memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
+ if (!ath9k_hw_set_keycache_entry(ah, keyix, hk, NULL)) {
+ /* TX MIC entry failed. No need to proceed further */
+ ath_print(common, ATH_DBG_FATAL,
+ "Setting TX MIC Key Failed\n");
+ return 0;
+ }
+
+ memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
+ /* XXX delete tx key on failure? */
+ return ath9k_hw_set_keycache_entry(ah, keyix + 32, hk, addr);
+}
+
+static int ath_reserve_key_cache_slot_tkip(struct ath_common *common)
+{
+ int i;
+
+ for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) {
+ if (test_bit(i, common->keymap) ||
+ test_bit(i + 64, common->keymap))
+ continue; /* At least one part of TKIP key allocated */
+ if (common->splitmic &&
+ (test_bit(i + 32, common->keymap) ||
+ test_bit(i + 64 + 32, common->keymap)))
+ continue; /* At least one part of TKIP key allocated */
+
+ /* Found a free slot for a TKIP key */
+ return i;
+ }
+ return -1;
+}
+
+static int ath_reserve_key_cache_slot(struct ath_common *common)
+{
+ int i;
+
+ /* First, try to find slots that would not be available for TKIP. */
+ if (common->splitmic) {
+ for (i = IEEE80211_WEP_NKID; i < common->keymax / 4; i++) {
+ if (!test_bit(i, common->keymap) &&
+ (test_bit(i + 32, common->keymap) ||
+ test_bit(i + 64, common->keymap) ||
+ test_bit(i + 64 + 32, common->keymap)))
+ return i;
+ if (!test_bit(i + 32, common->keymap) &&
+ (test_bit(i, common->keymap) ||
+ test_bit(i + 64, common->keymap) ||
+ test_bit(i + 64 + 32, common->keymap)))
+ return i + 32;
+ if (!test_bit(i + 64, common->keymap) &&
+ (test_bit(i , common->keymap) ||
+ test_bit(i + 32, common->keymap) ||
+ test_bit(i + 64 + 32, common->keymap)))
+ return i + 64;
+ if (!test_bit(i + 64 + 32, common->keymap) &&
+ (test_bit(i, common->keymap) ||
+ test_bit(i + 32, common->keymap) ||
+ test_bit(i + 64, common->keymap)))
+ return i + 64 + 32;
+ }
+ } else {
+ for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) {
+ if (!test_bit(i, common->keymap) &&
+ test_bit(i + 64, common->keymap))
+ return i;
+ if (test_bit(i, common->keymap) &&
+ !test_bit(i + 64, common->keymap))
+ return i + 64;
+ }
+ }
+
+ /* No partially used TKIP slots, pick any available slot */
+ for (i = IEEE80211_WEP_NKID; i < common->keymax; i++) {
+ /* Do not allow slots that could be needed for TKIP group keys
+ * to be used. This limitation could be removed if we know that
+ * TKIP will not be used. */
+ if (i >= 64 && i < 64 + IEEE80211_WEP_NKID)
+ continue;
+ if (common->splitmic) {
+ if (i >= 32 && i < 32 + IEEE80211_WEP_NKID)
+ continue;
+ if (i >= 64 + 32 && i < 64 + 32 + IEEE80211_WEP_NKID)
+ continue;
+ }
+
+ if (!test_bit(i, common->keymap))
+ return i; /* Found a free slot for a key */
+ }
+
+ /* No free slot found */
+ return -1;
+}
+
+/*
+ * Configure encryption in the HW.
+ */
+int ath9k_cmn_key_config(struct ath_common *common,
+ struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key)
+{
+ struct ath_hw *ah = common->ah;
+ struct ath9k_keyval hk;
+ const u8 *mac = NULL;
+ int ret = 0;
+ int idx;
+
+ memset(&hk, 0, sizeof(hk));
+
+ switch (key->alg) {
+ case ALG_WEP:
+ hk.kv_type = ATH9K_CIPHER_WEP;
+ break;
+ case ALG_TKIP:
+ hk.kv_type = ATH9K_CIPHER_TKIP;
+ break;
+ case ALG_CCMP:
+ hk.kv_type = ATH9K_CIPHER_AES_CCM;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ hk.kv_len = key->keylen;
+ memcpy(hk.kv_val, key->key, key->keylen);
+
+ if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
+ /* For now, use the default keys for broadcast keys. This may
+ * need to change with virtual interfaces. */
+ idx = key->keyidx;
+ } else if (key->keyidx) {
+ if (WARN_ON(!sta))
+ return -EOPNOTSUPP;
+ mac = sta->addr;
+
+ if (vif->type != NL80211_IFTYPE_AP) {
+ /* Only keyidx 0 should be used with unicast key, but
+ * allow this for client mode for now. */
+ idx = key->keyidx;
+ } else
+ return -EIO;
+ } else {
+ if (WARN_ON(!sta))
+ return -EOPNOTSUPP;
+ mac = sta->addr;
+
+ if (key->alg == ALG_TKIP)
+ idx = ath_reserve_key_cache_slot_tkip(common);
+ else
+ idx = ath_reserve_key_cache_slot(common);
+ if (idx < 0)
+ return -ENOSPC; /* no free key cache entries */
+ }
+
+ if (key->alg == ALG_TKIP)
+ ret = ath_setkey_tkip(common, idx, key->key, &hk, mac,
+ vif->type == NL80211_IFTYPE_AP);
+ else
+ ret = ath9k_hw_set_keycache_entry(ah, idx, &hk, mac);
+
+ if (!ret)
+ return -EIO;
+
+ set_bit(idx, common->keymap);
+ if (key->alg == ALG_TKIP) {
+ set_bit(idx + 64, common->keymap);
+ if (common->splitmic) {
+ set_bit(idx + 32, common->keymap);
+ set_bit(idx + 64 + 32, common->keymap);
+ }
+ }
+
+ return idx;
+}
+EXPORT_SYMBOL(ath9k_cmn_key_config);
+
+/*
+ * Delete Key.
+ */
+void ath9k_cmn_key_delete(struct ath_common *common,
+ struct ieee80211_key_conf *key)
+{
+ struct ath_hw *ah = common->ah;
+
+ ath9k_hw_keyreset(ah, key->hw_key_idx);
+ if (key->hw_key_idx < IEEE80211_WEP_NKID)
+ return;
+
+ clear_bit(key->hw_key_idx, common->keymap);
+ if (key->alg != ALG_TKIP)
+ return;
+
+ clear_bit(key->hw_key_idx + 64, common->keymap);
+ if (common->splitmic) {
+ ath9k_hw_keyreset(ah, key->hw_key_idx + 32);
+ clear_bit(key->hw_key_idx + 32, common->keymap);
+ clear_bit(key->hw_key_idx + 64 + 32, common->keymap);
+ }
+}
+EXPORT_SYMBOL(ath9k_cmn_key_delete);
+
static int __init ath9k_cmn_init(void)
{
return 0;