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path: root/drivers/net/wireless/ath/ath9k/common.c
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Diffstat (limited to 'drivers/net/wireless/ath/ath9k/common.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/common.c197
1 files changed, 197 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/common.c b/drivers/net/wireless/ath/ath9k/common.c
new file mode 100644
index 0000000..344fdde
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/common.c
@@ -0,0 +1,197 @@
+/*
+ * 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);
+
+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 ath9k_channel *ichan,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type)
+{
+ ichan->channel = chan->center_freq;
+ ichan->chan = chan;
+
+ if (chan->band == IEEE80211_BAND_2GHZ) {
+ ichan->chanmode = CHANNEL_G;
+ ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM;
+ } else {
+ ichan->chanmode = CHANNEL_A;
+ ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
+ }
+
+ if (channel_type != NL80211_CHAN_NO_HT)
+ ichan->chanmode = ath9k_get_extchanmode(chan, 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.chandef.chan;
+ struct ath9k_channel *channel;
+ u8 chan_idx;
+
+ chan_idx = curchan->hw_value;
+ channel = &ah->channels[chan_idx];
+ ath9k_cmn_update_ichannel(channel, curchan,
+ cfg80211_get_chandef_type(&hw->conf.chandef));
+
+ return channel;
+}
+EXPORT_SYMBOL(ath9k_cmn_get_curchannel);
+
+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);