Merge branch 'linus' into tracing/hw-breakpoints

Conflicts:
	arch/x86/Kconfig
	arch/x86/kernel/traps.c
	arch/x86/power/cpu.c
	arch/x86/power/cpu_32.c
	kernel/Makefile

Semantic conflict:
	arch/x86/kernel/hw_breakpoint.c

Merge reason: Resolve the conflicts, move from put_cpu_no_sched() to
              put_cpu() in arch/x86/kernel/hw_breakpoint.c.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2210 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ar9170/main.c b/drivers/net/wireless/ath/ar9170/main.c
new file mode 100644
index 00000000000..9d38cf60a0d
--- /dev/null
+++ b/drivers/net/wireless/ath/ar9170/main.c
@@ -0,0 +1,2210 @@
+/*
+ * Atheros AR9170 driver
+ *
+ * mac80211 interaction code
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2009, Christian Lamparter <chunkeey@web.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *    Copyright (c) 2007-2008 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/etherdevice.h>
+#include <net/mac80211.h>
+#include "ar9170.h"
+#include "hw.h"
+#include "cmd.h"
+
+static int modparam_nohwcrypt;
+module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
+MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
+
+#define RATE(_bitrate, _hw_rate, _txpidx, _flags) {	\
+	.bitrate	= (_bitrate),			\
+	.flags		= (_flags),			\
+	.hw_value	= (_hw_rate) | (_txpidx) << 4,	\
+}
+
+static struct ieee80211_rate __ar9170_ratetable[] = {
+	RATE(10, 0, 0, 0),
+	RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE),
+	RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE),
+	RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE),
+	RATE(60, 0xb, 0, 0),
+	RATE(90, 0xf, 0, 0),
+	RATE(120, 0xa, 0, 0),
+	RATE(180, 0xe, 0, 0),
+	RATE(240, 0x9, 0, 0),
+	RATE(360, 0xd, 1, 0),
+	RATE(480, 0x8, 2, 0),
+	RATE(540, 0xc, 3, 0),
+};
+#undef RATE
+
+#define ar9170_g_ratetable	(__ar9170_ratetable + 0)
+#define ar9170_g_ratetable_size	12
+#define ar9170_a_ratetable	(__ar9170_ratetable + 4)
+#define ar9170_a_ratetable_size	8
+
+/*
+ * NB: The hw_value is used as an index into the ar9170_phy_freq_params
+ *     array in phy.c so that we don't have to do frequency lookups!
+ */
+#define CHAN(_freq, _idx) {		\
+	.center_freq	= (_freq),	\
+	.hw_value	= (_idx),	\
+	.max_power	= 18, /* XXX */	\
+}
+
+static struct ieee80211_channel ar9170_2ghz_chantable[] = {
+	CHAN(2412,  0),
+	CHAN(2417,  1),
+	CHAN(2422,  2),
+	CHAN(2427,  3),
+	CHAN(2432,  4),
+	CHAN(2437,  5),
+	CHAN(2442,  6),
+	CHAN(2447,  7),
+	CHAN(2452,  8),
+	CHAN(2457,  9),
+	CHAN(2462, 10),
+	CHAN(2467, 11),
+	CHAN(2472, 12),
+	CHAN(2484, 13),
+};
+
+static struct ieee80211_channel ar9170_5ghz_chantable[] = {
+	CHAN(4920, 14),
+	CHAN(4940, 15),
+	CHAN(4960, 16),
+	CHAN(4980, 17),
+	CHAN(5040, 18),
+	CHAN(5060, 19),
+	CHAN(5080, 20),
+	CHAN(5180, 21),
+	CHAN(5200, 22),
+	CHAN(5220, 23),
+	CHAN(5240, 24),
+	CHAN(5260, 25),
+	CHAN(5280, 26),
+	CHAN(5300, 27),
+	CHAN(5320, 28),
+	CHAN(5500, 29),
+	CHAN(5520, 30),
+	CHAN(5540, 31),
+	CHAN(5560, 32),
+	CHAN(5580, 33),
+	CHAN(5600, 34),
+	CHAN(5620, 35),
+	CHAN(5640, 36),
+	CHAN(5660, 37),
+	CHAN(5680, 38),
+	CHAN(5700, 39),
+	CHAN(5745, 40),
+	CHAN(5765, 41),
+	CHAN(5785, 42),
+	CHAN(5805, 43),
+	CHAN(5825, 44),
+	CHAN(5170, 45),
+	CHAN(5190, 46),
+	CHAN(5210, 47),
+	CHAN(5230, 48),
+};
+#undef CHAN
+
+#define AR9170_HT_CAP							\
+{									\
+	.ht_supported	= true,						\
+	.cap		= IEEE80211_HT_CAP_MAX_AMSDU |			\
+			  IEEE80211_HT_CAP_SUP_WIDTH_20_40 |		\
+			  IEEE80211_HT_CAP_SGI_40 |			\
+			  IEEE80211_HT_CAP_DSSSCCK40 |			\
+			  IEEE80211_HT_CAP_SM_PS,			\
+	.ampdu_factor	= 3,						\
+	.ampdu_density	= 6,						\
+	.mcs		= {						\
+		.rx_mask = { 0xFF, 0xFF, 0, 0, 0, 0, 0, 0, 0, 0, },	\
+	},								\
+}
+
+static struct ieee80211_supported_band ar9170_band_2GHz = {
+	.channels	= ar9170_2ghz_chantable,
+	.n_channels	= ARRAY_SIZE(ar9170_2ghz_chantable),
+	.bitrates	= ar9170_g_ratetable,
+	.n_bitrates	= ar9170_g_ratetable_size,
+	.ht_cap		= AR9170_HT_CAP,
+};
+
+static struct ieee80211_supported_band ar9170_band_5GHz = {
+	.channels	= ar9170_5ghz_chantable,
+	.n_channels	= ARRAY_SIZE(ar9170_5ghz_chantable),
+	.bitrates	= ar9170_a_ratetable,
+	.n_bitrates	= ar9170_a_ratetable_size,
+	.ht_cap		= AR9170_HT_CAP,
+};
+
+static void ar9170_tx(struct ar9170 *ar);
+
+#ifdef AR9170_QUEUE_DEBUG
+static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb)
+{
+	struct ar9170_tx_control *txc = (void *) skb->data;
+	struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
+	struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
+	struct ieee80211_hdr *hdr = (void *) txc->frame_data;
+
+	printk(KERN_DEBUG "%s: => FRAME [skb:%p, q:%d, DA:[%pM] flags:%x "
+			  "mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n",
+	       wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb),
+	       ieee80211_get_DA(hdr), arinfo->flags,
+	       le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control),
+	       jiffies_to_msecs(arinfo->timeout - jiffies));
+}
+
+static void __ar9170_dump_txqueue(struct ar9170 *ar,
+				struct sk_buff_head *queue)
+{
+	struct sk_buff *skb;
+	int i = 0;
+
+	printk(KERN_DEBUG "---[ cut here ]---\n");
+	printk(KERN_DEBUG "%s: %d entries in queue.\n",
+	       wiphy_name(ar->hw->wiphy), skb_queue_len(queue));
+
+	skb_queue_walk(queue, skb) {
+		printk(KERN_DEBUG "index:%d => \n", i++);
+		ar9170_print_txheader(ar, skb);
+	}
+	if (i != skb_queue_len(queue))
+		printk(KERN_DEBUG "WARNING: queue frame counter "
+		       "mismatch %d != %d\n", skb_queue_len(queue), i);
+	printk(KERN_DEBUG "---[ end ]---\n");
+}
+
+static void ar9170_dump_txqueue(struct ar9170 *ar,
+				struct sk_buff_head *queue)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&queue->lock, flags);
+	__ar9170_dump_txqueue(ar, queue);
+	spin_unlock_irqrestore(&queue->lock, flags);
+}
+
+static void __ar9170_dump_txstats(struct ar9170 *ar)
+{
+	int i;
+
+	printk(KERN_DEBUG "%s: QoS queue stats\n",
+	       wiphy_name(ar->hw->wiphy));
+
+	for (i = 0; i < __AR9170_NUM_TXQ; i++)
+		printk(KERN_DEBUG "%s: queue:%d limit:%d len:%d waitack:%d\n",
+		       wiphy_name(ar->hw->wiphy), i, ar->tx_stats[i].limit,
+		       ar->tx_stats[i].len, skb_queue_len(&ar->tx_status[i]));
+}
+
+static void ar9170_dump_txstats(struct ar9170 *ar)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ar->tx_stats_lock, flags);
+	__ar9170_dump_txstats(ar);
+	spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+}
+#endif /* AR9170_QUEUE_DEBUG */
+
+/* caller must guarantee exclusive access for _bin_ queue. */
+static void ar9170_recycle_expired(struct ar9170 *ar,
+				   struct sk_buff_head *queue,
+				   struct sk_buff_head *bin)
+{
+	struct sk_buff *skb, *old = NULL;
+	unsigned long flags;
+
+	spin_lock_irqsave(&queue->lock, flags);
+	while ((skb = skb_peek(queue))) {
+		struct ieee80211_tx_info *txinfo;
+		struct ar9170_tx_info *arinfo;
+
+		txinfo = IEEE80211_SKB_CB(skb);
+		arinfo = (void *) txinfo->rate_driver_data;
+
+		if (time_is_before_jiffies(arinfo->timeout)) {
+#ifdef AR9170_QUEUE_DEBUG
+			printk(KERN_DEBUG "%s: [%ld > %ld] frame expired => "
+			       "recycle \n", wiphy_name(ar->hw->wiphy),
+			       jiffies, arinfo->timeout);
+			ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+			__skb_unlink(skb, queue);
+			__skb_queue_tail(bin, skb);
+		} else {
+			break;
+		}
+
+		if (unlikely(old == skb)) {
+			/* bail out - queue is shot. */
+
+			WARN_ON(1);
+			break;
+		}
+		old = skb;
+	}
+	spin_unlock_irqrestore(&queue->lock, flags);
+}
+
+static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
+				    u16 tx_status)
+{
+	struct ieee80211_tx_info *txinfo;
+	unsigned int retries = 0;
+
+	txinfo = IEEE80211_SKB_CB(skb);
+	ieee80211_tx_info_clear_status(txinfo);
+
+	switch (tx_status) {
+	case AR9170_TX_STATUS_RETRY:
+		retries = 2;
+	case AR9170_TX_STATUS_COMPLETE:
+		txinfo->flags |= IEEE80211_TX_STAT_ACK;
+		break;
+
+	case AR9170_TX_STATUS_FAILED:
+		retries = ar->hw->conf.long_frame_max_tx_count;
+		break;
+
+	default:
+		printk(KERN_ERR "%s: invalid tx_status response (%x).\n",
+		       wiphy_name(ar->hw->wiphy), tx_status);
+		break;
+	}
+
+	txinfo->status.rates[0].count = retries + 1;
+	skb_pull(skb, sizeof(struct ar9170_tx_control));
+	ieee80211_tx_status_irqsafe(ar->hw, skb);
+}
+
+void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data;
+	unsigned int queue = skb_get_queue_mapping(skb);
+	unsigned long flags;
+
+	spin_lock_irqsave(&ar->tx_stats_lock, flags);
+	ar->tx_stats[queue].len--;
+
+	if (skb_queue_empty(&ar->tx_pending[queue])) {
+#ifdef AR9170_QUEUE_STOP_DEBUG
+		printk(KERN_DEBUG "%s: wake queue %d\n",
+		       wiphy_name(ar->hw->wiphy), queue);
+		__ar9170_dump_txstats(ar);
+#endif /* AR9170_QUEUE_STOP_DEBUG */
+		ieee80211_wake_queue(ar->hw, queue);
+	}
+	spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+
+	if (arinfo->flags & AR9170_TX_FLAG_BLOCK_ACK) {
+		dev_kfree_skb_any(skb);
+	} else if (arinfo->flags & AR9170_TX_FLAG_WAIT_FOR_ACK) {
+		arinfo->timeout = jiffies +
+				  msecs_to_jiffies(AR9170_TX_TIMEOUT);
+
+		skb_queue_tail(&ar->tx_status[queue], skb);
+	} else if (arinfo->flags & AR9170_TX_FLAG_NO_ACK) {
+		ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED);
+	} else {
+#ifdef AR9170_QUEUE_DEBUG
+		printk(KERN_DEBUG "%s: unsupported frame flags!\n",
+		       wiphy_name(ar->hw->wiphy));
+		ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+		dev_kfree_skb_any(skb);
+	}
+
+	if (!ar->tx_stats[queue].len &&
+	    !skb_queue_empty(&ar->tx_pending[queue])) {
+		ar9170_tx(ar);
+	}
+}
+
+static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar,
+					     const u8 *mac,
+					     struct sk_buff_head *queue,
+					     const u32 rate)
+{
+	unsigned long flags;
+	struct sk_buff *skb;
+
+	/*
+	 * Unfortunately, the firmware does not tell to which (queued) frame
+	 * this transmission status report belongs to.
+	 *
+	 * So we have to make risky guesses - with the scarce information
+	 * the firmware provided (-> destination MAC, and phy_control) -
+	 * and hope that we picked the right one...
+	 */
+
+	spin_lock_irqsave(&queue->lock, flags);
+	skb_queue_walk(queue, skb) {
+		struct ar9170_tx_control *txc = (void *) skb->data;
+		struct ieee80211_hdr *hdr = (void *) txc->frame_data;
+		u32 r;
+
+		if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) {
+#ifdef AR9170_QUEUE_DEBUG
+			printk(KERN_DEBUG "%s: skip frame => DA %pM != %pM\n",
+			       wiphy_name(ar->hw->wiphy), mac,
+			       ieee80211_get_DA(hdr));
+			ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+			continue;
+		}
+
+		r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >>
+		    AR9170_TX_PHY_MCS_SHIFT;
+
+		if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) {
+#ifdef AR9170_QUEUE_DEBUG
+			printk(KERN_DEBUG "%s: skip frame => rate %d != %d\n",
+			       wiphy_name(ar->hw->wiphy), rate, r);
+			ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+			continue;
+		}
+
+		__skb_unlink(skb, queue);
+		spin_unlock_irqrestore(&queue->lock, flags);
+		return skb;
+	}
+
+#ifdef AR9170_QUEUE_DEBUG
+	printk(KERN_ERR "%s: ESS:[%pM] does not have any "
+			"outstanding frames in queue.\n",
+			wiphy_name(ar->hw->wiphy), mac);
+	__ar9170_dump_txqueue(ar, queue);
+#endif /* AR9170_QUEUE_DEBUG */
+	spin_unlock_irqrestore(&queue->lock, flags);
+
+	return NULL;
+}
+
+/*
+ * This worker tries to keeps an maintain tx_status queues.
+ * So we can guarantee that incoming tx_status reports are
+ * actually for a pending frame.
+ */
+
+static void ar9170_tx_janitor(struct work_struct *work)
+{
+	struct ar9170 *ar = container_of(work, struct ar9170,
+					 tx_janitor.work);
+	struct sk_buff_head waste;
+	unsigned int i;
+	bool resched = false;
+
+	if (unlikely(!IS_STARTED(ar)))
+		return ;
+
+	skb_queue_head_init(&waste);
+
+	for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+#ifdef AR9170_QUEUE_DEBUG
+		printk(KERN_DEBUG "%s: garbage collector scans queue:%d\n",
+		       wiphy_name(ar->hw->wiphy), i);
+		ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
+		ar9170_dump_txqueue(ar, &ar->tx_status[i]);
+#endif /* AR9170_QUEUE_DEBUG */
+
+		ar9170_recycle_expired(ar, &ar->tx_status[i], &waste);
+		ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste);
+		skb_queue_purge(&waste);
+
+		if (!skb_queue_empty(&ar->tx_status[i]) ||
+		    !skb_queue_empty(&ar->tx_pending[i]))
+			resched = true;
+	}
+
+	if (resched)
+		queue_delayed_work(ar->hw->workqueue,
+				   &ar->tx_janitor,
+				   msecs_to_jiffies(AR9170_JANITOR_DELAY));
+}
+
+void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len)
+{
+	struct ar9170_cmd_response *cmd = (void *) buf;
+
+	if ((cmd->type & 0xc0) != 0xc0) {
+		ar->callback_cmd(ar, len, buf);
+		return;
+	}
+
+	/* hardware event handlers */
+	switch (cmd->type) {
+	case 0xc1: {
+		/*
+		 * TX status notification:
+		 * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1
+		 *
+		 * XX always 81
+		 * YY always 00
+		 * M1-M6 is the MAC address
+		 * R1-R4 is the transmit rate
+		 * S1-S2 is the transmit status
+		 */
+
+		struct sk_buff *skb;
+		u32 phy = le32_to_cpu(cmd->tx_status.rate);
+		u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >>
+			AR9170_TX_PHY_QOS_SHIFT;
+#ifdef AR9170_QUEUE_DEBUG
+		printk(KERN_DEBUG "%s: recv tx_status for %pM, p:%08x, q:%d\n",
+		       wiphy_name(ar->hw->wiphy), cmd->tx_status.dst, phy, q);
+#endif /* AR9170_QUEUE_DEBUG */
+
+		skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst,
+					    &ar->tx_status[q],
+					    AR9170_TX_INVALID_RATE);
+		if (unlikely(!skb))
+			return ;
+
+		ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status));
+		break;
+		}
+
+	case 0xc0:
+		/*
+		 * pre-TBTT event
+		 */
+		if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP)
+			queue_work(ar->hw->workqueue, &ar->beacon_work);
+		break;
+
+	case 0xc2:
+		/*
+		 * (IBSS) beacon send notification
+		 * bytes: 04 c2 XX YY B4 B3 B2 B1
+		 *
+		 * XX always 80
+		 * YY always 00
+		 * B1-B4 "should" be the number of send out beacons.
+		 */
+		break;
+
+	case 0xc3:
+		/* End of Atim Window */
+		break;
+
+	case 0xc4:
+	case 0xc5:
+		/* BlockACK events */
+		break;
+
+	case 0xc6:
+		/* Watchdog Interrupt */
+		break;
+
+	case 0xc9:
+		/* retransmission issue / SIFS/EIFS collision ?! */
+		break;
+
+	/* firmware debug */
+	case 0xca:
+		printk(KERN_DEBUG "ar9170 FW: %.*s\n", len - 4, (char *)buf + 4);
+		break;
+	case 0xcb:
+		len -= 4;
+
+		switch (len) {
+		case 1:
+			printk(KERN_DEBUG "ar9170 FW: u8: %#.2x\n",
+				*((char *)buf + 4));
+			break;
+		case 2:
+			printk(KERN_DEBUG "ar9170 FW: u8: %#.4x\n",
+				le16_to_cpup((__le16 *)((char *)buf + 4)));
+			break;
+		case 4:
+			printk(KERN_DEBUG "ar9170 FW: u8: %#.8x\n",
+				le32_to_cpup((__le32 *)((char *)buf + 4)));
+			break;
+		case 8:
+			printk(KERN_DEBUG "ar9170 FW: u8: %#.16lx\n",
+				(unsigned long)le64_to_cpup(
+						(__le64 *)((char *)buf + 4)));
+			break;
+		}
+		break;
+	case 0xcc:
+		print_hex_dump_bytes("ar9170 FW:", DUMP_PREFIX_NONE,
+				     (char *)buf + 4, len - 4);
+		break;
+
+	default:
+		printk(KERN_INFO "received unhandled event %x\n", cmd->type);
+		print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len);
+		break;
+	}
+}
+
+static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar)
+{
+	memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head));
+	ar->rx_mpdu.has_plcp = false;
+}
+
+int ar9170_nag_limiter(struct ar9170 *ar)
+{
+	bool print_message;
+
+	/*
+	 * we expect all sorts of errors in promiscuous mode.
+	 * don't bother with it, it's OK!
+	 */
+	if (ar->sniffer_enabled)
+		return false;
+
+	/*
+	 * only go for frequent errors! The hardware tends to
+	 * do some stupid thing once in a while under load, in
+	 * noisy environments or just for fun!
+	 */
+	if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit())
+		print_message = true;
+	else
+		print_message = false;
+
+	/* reset threshold for "once in a while" */
+	ar->bad_hw_nagger = jiffies + HZ / 4;
+	return print_message;
+}
+
+static int ar9170_rx_mac_status(struct ar9170 *ar,
+				struct ar9170_rx_head *head,
+				struct ar9170_rx_macstatus *mac,
+				struct ieee80211_rx_status *status)
+{
+	u8 error, decrypt;
+
+	BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12);
+	BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4);
+
+	error = mac->error;
+	if (error & AR9170_RX_ERROR_MMIC) {
+		status->flag |= RX_FLAG_MMIC_ERROR;
+		error &= ~AR9170_RX_ERROR_MMIC;
+	}
+
+	if (error & AR9170_RX_ERROR_PLCP) {
+		status->flag |= RX_FLAG_FAILED_PLCP_CRC;
+		error &= ~AR9170_RX_ERROR_PLCP;
+
+		if (!(ar->filter_state & FIF_PLCPFAIL))
+			return -EINVAL;
+	}
+
+	if (error & AR9170_RX_ERROR_FCS) {
+		status->flag |= RX_FLAG_FAILED_FCS_CRC;
+		error &= ~AR9170_RX_ERROR_FCS;
+
+		if (!(ar->filter_state & FIF_FCSFAIL))
+			return -EINVAL;
+	}
+
+	decrypt = ar9170_get_decrypt_type(mac);
+	if (!(decrypt & AR9170_RX_ENC_SOFTWARE) &&
+	    decrypt != AR9170_ENC_ALG_NONE)
+		status->flag |= RX_FLAG_DECRYPTED;
+
+	/* ignore wrong RA errors */
+	error &= ~AR9170_RX_ERROR_WRONG_RA;
+
+	if (error & AR9170_RX_ERROR_DECRYPT) {
+		error &= ~AR9170_RX_ERROR_DECRYPT;
+		/*
+		 * Rx decryption is done in place,
+		 * the original data is lost anyway.
+		 */
+
+		return -EINVAL;
+	}
+
+	/* drop any other error frames */
+	if (unlikely(error)) {
+		/* TODO: update netdevice's RX dropped/errors statistics */
+
+		if (ar9170_nag_limiter(ar))
+			printk(KERN_DEBUG "%s: received frame with "
+			       "suspicious error code (%#x).\n",
+			       wiphy_name(ar->hw->wiphy), error);
+
+		return -EINVAL;
+	}
+
+	status->band = ar->channel->band;
+	status->freq = ar->channel->center_freq;
+
+	switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) {
+	case AR9170_RX_STATUS_MODULATION_CCK:
+		if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE)
+			status->flag |= RX_FLAG_SHORTPRE;
+		switch (head->plcp[0]) {
+		case 0x0a:
+			status->rate_idx = 0;
+			break;
+		case 0x14:
+			status->rate_idx = 1;
+			break;
+		case 0x37:
+			status->rate_idx = 2;
+			break;
+		case 0x6e:
+			status->rate_idx = 3;
+			break;
+		default:
+			if (ar9170_nag_limiter(ar))
+				printk(KERN_ERR "%s: invalid plcp cck rate "
+				       "(%x).\n", wiphy_name(ar->hw->wiphy),
+				       head->plcp[0]);
+			return -EINVAL;
+		}
+		break;
+
+	case AR9170_RX_STATUS_MODULATION_OFDM:
+		switch (head->plcp[0] & 0xf) {
+		case 0xb:
+			status->rate_idx = 0;
+			break;
+		case 0xf:
+			status->rate_idx = 1;
+			break;
+		case 0xa:
+			status->rate_idx = 2;
+			break;
+		case 0xe:
+			status->rate_idx = 3;
+			break;
+		case 0x9:
+			status->rate_idx = 4;
+			break;
+		case 0xd:
+			status->rate_idx = 5;
+			break;
+		case 0x8:
+			status->rate_idx = 6;
+			break;
+		case 0xc:
+			status->rate_idx = 7;
+			break;
+		default:
+			if (ar9170_nag_limiter(ar))
+				printk(KERN_ERR "%s: invalid plcp ofdm rate "
+				       "(%x).\n", wiphy_name(ar->hw->wiphy),
+				       head->plcp[0]);
+			return -EINVAL;
+		}
+		if (status->band == IEEE80211_BAND_2GHZ)
+			status->rate_idx += 4;
+		break;
+
+	case AR9170_RX_STATUS_MODULATION_HT:
+		if (head->plcp[3] & 0x80)
+			status->flag |= RX_FLAG_40MHZ;
+		if (head->plcp[6] & 0x80)
+			status->flag |= RX_FLAG_SHORT_GI;
+
+		status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f);
+		status->flag |= RX_FLAG_HT;
+		break;
+
+	case AR9170_RX_STATUS_MODULATION_DUPOFDM:
+		/* XXX */
+		if (ar9170_nag_limiter(ar))
+			printk(KERN_ERR "%s: invalid modulation\n",
+			       wiphy_name(ar->hw->wiphy));
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void ar9170_rx_phy_status(struct ar9170 *ar,
+				 struct ar9170_rx_phystatus *phy,
+				 struct ieee80211_rx_status *status)
+{
+	int i;
+
+	BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20);
+
+	for (i = 0; i < 3; i++)
+		if (phy->rssi[i] != 0x80)
+			status->antenna |= BIT(i);
+
+	/* post-process RSSI */
+	for (i = 0; i < 7; i++)
+		if (phy->rssi[i] & 0x80)
+			phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f;
+
+	/* TODO: we could do something with phy_errors */
+	status->signal = ar->noise[0] + phy->rssi_combined;
+	status->noise = ar->noise[0];
+}
+
+static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len)
+{
+	struct sk_buff *skb;
+	int reserved = 0;
+	struct ieee80211_hdr *hdr = (void *) buf;
+
+	if (ieee80211_is_data_qos(hdr->frame_control)) {
+		u8 *qc = ieee80211_get_qos_ctl(hdr);
+		reserved += NET_IP_ALIGN;
+
+		if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)
+			reserved += NET_IP_ALIGN;
+	}
+
+	if (ieee80211_has_a4(hdr->frame_control))
+		reserved += NET_IP_ALIGN;
+
+	reserved = 32 + (reserved & NET_IP_ALIGN);
+
+	skb = dev_alloc_skb(len + reserved);
+	if (likely(skb)) {
+		skb_reserve(skb, reserved);
+		memcpy(skb_put(skb, len), buf, len);
+	}
+
+	return skb;
+}
+
+/*
+ * If the frame alignment is right (or the kernel has
+ * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there
+ * is only a single MPDU in the USB frame, then we could
+ * submit to mac80211 the SKB directly. However, since
+ * there may be multiple packets in one SKB in stream
+ * mode, and we need to observe the proper ordering,
+ * this is non-trivial.
+ */
+
+static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len)
+{
+	struct ar9170_rx_head *head;
+	struct ar9170_rx_macstatus *mac;
+	struct ar9170_rx_phystatus *phy = NULL;
+	struct ieee80211_rx_status status;
+	struct sk_buff *skb;
+	int mpdu_len;
+
+	if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac))))
+		return ;
+
+	/* Received MPDU */
+	mpdu_len = len - sizeof(*mac);
+
+	mac = (void *)(buf + mpdu_len);
+	if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) {
+		/* this frame is too damaged and can't be used - drop it */
+
+		return ;
+	}
+
+	switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) {
+	case AR9170_RX_STATUS_MPDU_FIRST:
+		/* first mpdu packet has the plcp header */
+		if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) {
+			head = (void *) buf;
+			memcpy(&ar->rx_mpdu.plcp, (void *) buf,
+			       sizeof(struct ar9170_rx_head));
+
+			mpdu_len -= sizeof(struct ar9170_rx_head);
+			buf += sizeof(struct ar9170_rx_head);
+			ar->rx_mpdu.has_plcp = true;
+		} else {
+			if (ar9170_nag_limiter(ar))
+				printk(KERN_ERR "%s: plcp info is clipped.\n",
+				       wiphy_name(ar->hw->wiphy));
+			return ;
+		}
+		break;
+
+	case AR9170_RX_STATUS_MPDU_LAST:
+		/* last mpdu has a extra tail with phy status information */
+
+		if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) {
+			mpdu_len -= sizeof(struct ar9170_rx_phystatus);
+			phy = (void *)(buf + mpdu_len);
+		} else {
+			if (ar9170_nag_limiter(ar))
+				printk(KERN_ERR "%s: frame tail is clipped.\n",
+				       wiphy_name(ar->hw->wiphy));
+			return ;
+		}
+
+	case AR9170_RX_STATUS_MPDU_MIDDLE:
+		/* middle mpdus are just data */
+		if (unlikely(!ar->rx_mpdu.has_plcp)) {
+			if (!ar9170_nag_limiter(ar))
+				return ;
+
+			printk(KERN_ERR "%s: rx stream did not start "
+					"with a first_mpdu frame tag.\n",
+			       wiphy_name(ar->hw->wiphy));
+
+			return ;
+		}
+
+		head = &ar->rx_mpdu.plcp;
+		break;
+
+	case AR9170_RX_STATUS_MPDU_SINGLE:
+		/* single mpdu - has plcp (head) and phy status (tail) */
+		head = (void *) buf;
+
+		mpdu_len -= sizeof(struct ar9170_rx_head);
+		mpdu_len -= sizeof(struct ar9170_rx_phystatus);
+
+		buf += sizeof(struct ar9170_rx_head);
+		phy = (void *)(buf + mpdu_len);
+		break;
+
+	default:
+		BUG_ON(1);
+		break;
+	}
+
+	if (unlikely(mpdu_len < FCS_LEN))
+		return ;
+
+	memset(&status, 0, sizeof(status));
+	if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status)))
+		return ;
+
+	if (phy)
+		ar9170_rx_phy_status(ar, phy, &status);
+
+	skb = ar9170_rx_copy_data(buf, mpdu_len);
+	if (likely(skb))
+		ieee80211_rx_irqsafe(ar->hw, skb, &status);
+}
+
+void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb)
+{
+	unsigned int i, tlen, resplen, wlen = 0, clen = 0;
+	u8 *tbuf, *respbuf;
+
+	tbuf = skb->data;
+	tlen = skb->len;
+
+	while (tlen >= 4) {
+		clen = tbuf[1] << 8 | tbuf[0];
+		wlen = ALIGN(clen, 4);
+
+		/* check if this is stream has a valid tag.*/
+		if (tbuf[2] != 0 || tbuf[3] != 0x4e) {
+			/*
+			 * TODO: handle the highly unlikely event that the
+			 * corrupted stream has the TAG at the right position.
+			 */
+
+			/* check if the frame can be repaired. */
+			if (!ar->rx_failover_missing) {
+				/* this is no "short read". */
+				if (ar9170_nag_limiter(ar)) {
+					printk(KERN_ERR "%s: missing tag!\n",
+					       wiphy_name(ar->hw->wiphy));
+					goto err_telluser;
+				} else
+					goto err_silent;
+			}
+
+			if (ar->rx_failover_missing > tlen) {
+				if (ar9170_nag_limiter(ar)) {
+					printk(KERN_ERR "%s: possible multi "
+					       "stream corruption!\n",
+					       wiphy_name(ar->hw->wiphy));
+					goto err_telluser;
+				} else
+					goto err_silent;
+			}
+
+			memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
+			ar->rx_failover_missing -= tlen;
+
+			if (ar->rx_failover_missing <= 0) {
+				/*
+				 * nested ar9170_rx call!
+				 * termination is guranteed, even when the
+				 * combined frame also have a element with
+				 * a bad tag.
+				 */
+
+				ar->rx_failover_missing = 0;
+				ar9170_rx(ar, ar->rx_failover);
+
+				skb_reset_tail_pointer(ar->rx_failover);
+				skb_trim(ar->rx_failover, 0);
+			}
+
+			return ;
+		}
+
+		/* check if stream is clipped */
+		if (wlen > tlen - 4) {
+			if (ar->rx_failover_missing) {
+				/* TODO: handle double stream corruption. */
+				if (ar9170_nag_limiter(ar)) {
+					printk(KERN_ERR "%s: double rx stream "
+					       "corruption!\n",
+						wiphy_name(ar->hw->wiphy));
+					goto err_telluser;
+				} else
+					goto err_silent;
+			}
+
+			/*
+			 * save incomplete data set.
+			 * the firmware will resend the missing bits when
+			 * the rx - descriptor comes round again.
+			 */
+
+			memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
+			ar->rx_failover_missing = clen - tlen;
+			return ;
+		}
+		resplen = clen;
+		respbuf = tbuf + 4;
+		tbuf += wlen + 4;
+		tlen -= wlen + 4;
+
+		i = 0;
+
+		/* weird thing, but this is the same in the original driver */
+		while (resplen > 2 && i < 12 &&
+		       respbuf[0] == 0xff && respbuf[1] == 0xff) {
+			i += 2;
+			resplen -= 2;
+			respbuf += 2;
+		}
+
+		if (resplen < 4)
+			continue;
+
+		/* found the 6 * 0xffff marker? */
+		if (i == 12)
+			ar9170_handle_command_response(ar, respbuf, resplen);
+		else
+			ar9170_handle_mpdu(ar, respbuf, clen);
+	}
+
+	if (tlen) {
+		if (net_ratelimit())
+			printk(KERN_ERR "%s: %d bytes of unprocessed "
+					"data left in rx stream!\n",
+			       wiphy_name(ar->hw->wiphy), tlen);
+
+		goto err_telluser;
+	}
+
+	return ;
+
+err_telluser:
+	printk(KERN_ERR "%s: damaged RX stream data [want:%d, "
+			"data:%d, rx:%d, pending:%d ]\n",
+	       wiphy_name(ar->hw->wiphy), clen, wlen, tlen,
+	       ar->rx_failover_missing);
+
+	if (ar->rx_failover_missing)
+		print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET,
+				     ar->rx_failover->data,
+				     ar->rx_failover->len);
+
+	print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET,
+			     skb->data, skb->len);
+
+	printk(KERN_ERR "%s: please check your hardware and cables, if "
+			"you see this message frequently.\n",
+	       wiphy_name(ar->hw->wiphy));
+
+err_silent:
+	if (ar->rx_failover_missing) {
+		skb_reset_tail_pointer(ar->rx_failover);
+		skb_trim(ar->rx_failover, 0);
+		ar->rx_failover_missing = 0;
+	}
+}
+
+#define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop)		\
+do {									\
+	queue.aifs = ai_fs;						\
+	queue.cw_min = cwmin;						\
+	queue.cw_max = cwmax;						\
+	queue.txop = _txop;						\
+} while (0)
+
+static int ar9170_op_start(struct ieee80211_hw *hw)
+{
+	struct ar9170 *ar = hw->priv;
+	int err, i;
+
+	mutex_lock(&ar->mutex);
+
+	ar->filter_changed = 0;
+
+	/* reinitialize queues statistics */
+	memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
+	for (i = 0; i < __AR9170_NUM_TXQ; i++)
+		ar->tx_stats[i].limit = AR9170_TXQ_DEPTH;
+
+	/* reset QoS defaults */
+	AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023,  0); /* BEST EFFORT*/
+	AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023,  0); /* BACKGROUND */
+	AR9170_FILL_QUEUE(ar->edcf[2], 2, 7,    15, 94); /* VIDEO */
+	AR9170_FILL_QUEUE(ar->edcf[3], 2, 3,     7, 47); /* VOICE */
+	AR9170_FILL_QUEUE(ar->edcf[4], 2, 3,     7,  0); /* SPECIAL */
+
+	ar->bad_hw_nagger = jiffies;
+
+	err = ar->open(ar);
+	if (err)
+		goto out;
+
+	err = ar9170_init_mac(ar);
+	if (err)
+		goto out;
+
+	err = ar9170_set_qos(ar);
+	if (err)
+		goto out;
+
+	err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ);
+	if (err)
+		goto out;
+
+	err = ar9170_init_rf(ar);
+	if (err)
+		goto out;
+
+	/* start DMA */
+	err = ar9170_write_reg(ar, 0x1c3d30, 0x100);
+	if (err)
+		goto out;
+
+	ar->state = AR9170_STARTED;
+
+out:
+	mutex_unlock(&ar->mutex);
+	return err;
+}
+
+static void ar9170_op_stop(struct ieee80211_hw *hw)
+{
+	struct ar9170 *ar = hw->priv;
+	unsigned int i;
+
+	if (IS_STARTED(ar))
+		ar->state = AR9170_IDLE;
+
+	flush_workqueue(ar->hw->workqueue);
+
+	cancel_delayed_work_sync(&ar->tx_janitor);
+	cancel_work_sync(&ar->filter_config_work);
+	cancel_work_sync(&ar->beacon_work);
+	mutex_lock(&ar->mutex);
+
+	if (IS_ACCEPTING_CMD(ar)) {
+		ar9170_set_leds_state(ar, 0);
+
+		/* stop DMA */
+		ar9170_write_reg(ar, 0x1c3d30, 0);
+		ar->stop(ar);
+	}
+
+	for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+		skb_queue_purge(&ar->tx_pending[i]);
+		skb_queue_purge(&ar->tx_status[i]);
+	}
+	mutex_unlock(&ar->mutex);
+}
+
+static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr;
+	struct ar9170_tx_control *txc;
+	struct ieee80211_tx_info *info;
+	struct ieee80211_tx_rate *txrate;
+	struct ar9170_tx_info *arinfo;
+	unsigned int queue = skb_get_queue_mapping(skb);
+	u16 keytype = 0;
+	u16 len, icv = 0;
+
+	BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
+
+	hdr = (void *)skb->data;
+	info = IEEE80211_SKB_CB(skb);
+	len = skb->len;
+
+	txc = (void *)skb_push(skb, sizeof(*txc));
+
+	if (info->control.hw_key) {
+		icv = info->control.hw_key->icv_len;
+
+		switch (info->control.hw_key->alg) {
+		case ALG_WEP:
+			keytype = AR9170_TX_MAC_ENCR_RC4;
+			break;
+		case ALG_TKIP:
+			keytype = AR9170_TX_MAC_ENCR_RC4;
+			break;
+		case ALG_CCMP:
+			keytype = AR9170_TX_MAC_ENCR_AES;
+			break;
+		default:
+			WARN_ON(1);
+			goto err_out;
+		}
+	}
+
+	/* Length */
+	txc->length = cpu_to_le16(len + icv + 4);
+
+	txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION |
+				       AR9170_TX_MAC_BACKOFF);
+	txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] <<
+					AR9170_TX_MAC_QOS_SHIFT);
+	txc->mac_control |= cpu_to_le16(keytype);
+	txc->phy_control = cpu_to_le32(0);
+
+	if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+		txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK);
+
+	txrate = &info->control.rates[0];
+	if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
+		txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS);
+	else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
+		txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS);
+
+	arinfo = (void *)info->rate_driver_data;
+	arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT);
+
+	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
+	     (is_valid_ether_addr(ieee80211_get_DA(hdr)))) {
+		if (info->flags & IEEE80211_TX_CTL_AMPDU) {
+			if (unlikely(!info->control.sta))
+				goto err_out;
+
+			txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR);
+			arinfo->flags = AR9170_TX_FLAG_BLOCK_ACK;
+			goto out;
+		}
+
+		txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE);
+		/*
+		 * WARNING:
+		 * Putting the QoS queue bits into an unexplored territory is
+		 * certainly not elegant.
+		 *
+		 * In my defense: This idea provides a reasonable way to
+		 * smuggle valuable information to the tx_status callback.
+		 * Also, the idea behind this bit-abuse came straight from
+		 * the original driver code.
+		 */
+
+		txc->phy_control |=
+			cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT);
+		arinfo->flags = AR9170_TX_FLAG_WAIT_FOR_ACK;
+	} else {
+		arinfo->flags = AR9170_TX_FLAG_NO_ACK;
+	}
+
+out:
+	return 0;
+
+err_out:
+	skb_pull(skb, sizeof(*txc));
+	return -EINVAL;
+}
+
+static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb)
+{
+	struct ar9170_tx_control *txc;
+	struct ieee80211_tx_info *info;
+	struct ieee80211_rate *rate = NULL;
+	struct ieee80211_tx_rate *txrate;
+	u32 power, chains;
+
+	txc = (void *) skb->data;
+	info = IEEE80211_SKB_CB(skb);
+	txrate = &info->control.rates[0];
+
+	if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
+		txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD);
+
+	if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
+		txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE);
+
+	if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+		txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ);
+	/* this works because 40 MHz is 2 and dup is 3 */
+	if (txrate->flags & IEEE80211_TX_RC_DUP_DATA)
+		txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP);
+
+	if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
+		txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI);
+
+	if (txrate->flags & IEEE80211_TX_RC_MCS) {
+		u32 r = txrate->idx;
+		u8 *txpower;
+
+		/* heavy clip control */
+		txc->phy_control |= cpu_to_le32((r & 0x7) << 7);
+
+		r <<= AR9170_TX_PHY_MCS_SHIFT;
+		BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK);
+
+		txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK);
+		txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT);
+
+		if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
+			if (info->band == IEEE80211_BAND_5GHZ)
+				txpower = ar->power_5G_ht40;
+			else
+				txpower = ar->power_2G_ht40;
+		} else {
+			if (info->band == IEEE80211_BAND_5GHZ)
+				txpower = ar->power_5G_ht20;
+			else
+				txpower = ar->power_2G_ht20;
+		}
+
+		power = txpower[(txrate->idx) & 7];
+	} else {
+		u8 *txpower;
+		u32 mod;
+		u32 phyrate;
+		u8 idx = txrate->idx;
+
+		if (info->band != IEEE80211_BAND_2GHZ) {
+			idx += 4;
+			txpower = ar->power_5G_leg;
+			mod = AR9170_TX_PHY_MOD_OFDM;
+		} else {
+			if (idx < 4) {
+				txpower = ar->power_2G_cck;
+				mod = AR9170_TX_PHY_MOD_CCK;
+			} else {
+				mod = AR9170_TX_PHY_MOD_OFDM;
+				txpower = ar->power_2G_ofdm;
+			}
+		}
+
+		rate = &__ar9170_ratetable[idx];
+
+		phyrate = rate->hw_value & 0xF;
+		power = txpower[(rate->hw_value & 0x30) >> 4];
+		phyrate <<= AR9170_TX_PHY_MCS_SHIFT;
+
+		txc->phy_control |= cpu_to_le32(mod);
+		txc->phy_control |= cpu_to_le32(phyrate);
+	}
+
+	power <<= AR9170_TX_PHY_TX_PWR_SHIFT;
+	power &= AR9170_TX_PHY_TX_PWR_MASK;
+	txc->phy_control |= cpu_to_le32(power);
+
+	/* set TX chains */
+	if (ar->eeprom.tx_mask == 1) {
+		chains = AR9170_TX_PHY_TXCHAIN_1;
+	} else {
+		chains = AR9170_TX_PHY_TXCHAIN_2;
+
+		/* >= 36M legacy OFDM - use only one chain */
+		if (rate && rate->bitrate >= 360)
+			chains = AR9170_TX_PHY_TXCHAIN_1;
+	}
+	txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT);
+}
+
+static void ar9170_tx(struct ar9170 *ar)
+{
+	struct sk_buff *skb;
+	unsigned long flags;
+	struct ieee80211_tx_info *info;
+	struct ar9170_tx_info *arinfo;
+	unsigned int i, frames, frames_failed, remaining_space;
+	int err;
+	bool schedule_garbagecollector = false;
+
+	BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
+
+	if (unlikely(!IS_STARTED(ar)))
+		return ;
+
+	remaining_space = AR9170_TX_MAX_PENDING;
+
+	for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+		spin_lock_irqsave(&ar->tx_stats_lock, flags);
+		if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) {
+#ifdef AR9170_QUEUE_DEBUG
+			printk(KERN_DEBUG "%s: queue %d full\n",
+			       wiphy_name(ar->hw->wiphy), i);
+
+			__ar9170_dump_txstats(ar);
+			printk(KERN_DEBUG "stuck frames: ===> \n");
+			ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
+			ar9170_dump_txqueue(ar, &ar->tx_status[i]);
+#endif /* AR9170_QUEUE_DEBUG */
+			ieee80211_stop_queue(ar->hw, i);
+			spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+			continue;
+		}
+
+		frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len,
+			     skb_queue_len(&ar->tx_pending[i]));
+
+		if (remaining_space < frames) {
+#ifdef AR9170_QUEUE_DEBUG
+			printk(KERN_DEBUG "%s: tx quota reached queue:%d, "
+			       "remaining slots:%d, needed:%d\n",
+			       wiphy_name(ar->hw->wiphy), i, remaining_space,
+			       frames);
+
+			ar9170_dump_txstats(ar);
+#endif /* AR9170_QUEUE_DEBUG */
+			frames = remaining_space;
+		}
+
+		ar->tx_stats[i].len += frames;
+		ar->tx_stats[i].count += frames;
+		spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+
+		if (!frames)
+			continue;
+
+		frames_failed = 0;
+		while (frames) {
+			skb = skb_dequeue(&ar->tx_pending[i]);
+			if (unlikely(!skb)) {
+				frames_failed += frames;
+				frames = 0;
+				break;
+			}
+
+			info = IEEE80211_SKB_CB(skb);
+			arinfo = (void *) info->rate_driver_data;
+
+			/* TODO: cancel stuck frames */
+			arinfo->timeout = jiffies +
+					  msecs_to_jiffies(AR9170_TX_TIMEOUT);
+
+#ifdef AR9170_QUEUE_DEBUG
+			printk(KERN_DEBUG "%s: send frame q:%d =>\n",
+			       wiphy_name(ar->hw->wiphy), i);
+			ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+
+			err = ar->tx(ar, skb);
+			if (unlikely(err)) {
+				frames_failed++;
+				dev_kfree_skb_any(skb);
+			} else {
+				remaining_space--;
+				schedule_garbagecollector = true;
+			}
+
+			frames--;
+		}
+
+#ifdef AR9170_QUEUE_DEBUG
+		printk(KERN_DEBUG "%s: ar9170_tx report for queue %d\n",
+		       wiphy_name(ar->hw->wiphy), i);
+
+		printk(KERN_DEBUG "%s: unprocessed pending frames left:\n",
+		       wiphy_name(ar->hw->wiphy));
+		ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
+#endif /* AR9170_QUEUE_DEBUG */
+
+		if (unlikely(frames_failed)) {
+#ifdef AR9170_QUEUE_DEBUG
+			printk(KERN_DEBUG "%s: frames failed =>\n",
+			       wiphy_name(ar->hw->wiphy), frames_failed);
+#endif /* AR9170_QUEUE_DEBUG */
+
+			spin_lock_irqsave(&ar->tx_stats_lock, flags);
+			ar->tx_stats[i].len -= frames_failed;
+			ar->tx_stats[i].count -= frames_failed;
+			ieee80211_wake_queue(ar->hw, i);
+			spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+		}
+	}
+
+	if (schedule_garbagecollector)
+		queue_delayed_work(ar->hw->workqueue,
+				   &ar->tx_janitor,
+				   msecs_to_jiffies(AR9170_JANITOR_DELAY));
+}
+
+int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+	struct ar9170 *ar = hw->priv;
+	struct ieee80211_tx_info *info;
+
+	if (unlikely(!IS_STARTED(ar)))
+		goto err_free;
+
+	if (unlikely(ar9170_tx_prepare(ar, skb)))
+		goto err_free;
+
+	info = IEEE80211_SKB_CB(skb);
+	if (info->flags & IEEE80211_TX_CTL_AMPDU) {
+		/* drop frame, we do not allow TX A-MPDU aggregation yet. */
+		goto err_free;
+	} else {
+		unsigned int queue = skb_get_queue_mapping(skb);
+
+		ar9170_tx_prepare_phy(ar, skb);
+		skb_queue_tail(&ar->tx_pending[queue], skb);
+	}
+
+	ar9170_tx(ar);
+	return NETDEV_TX_OK;
+
+err_free:
+	dev_kfree_skb_any(skb);
+	return NETDEV_TX_OK;
+}
+
+static int ar9170_op_add_interface(struct ieee80211_hw *hw,
+				   struct ieee80211_if_init_conf *conf)
+{
+	struct ar9170 *ar = hw->priv;
+	int err = 0;
+
+	mutex_lock(&ar->mutex);
+
+	if (ar->vif) {
+		err = -EBUSY;
+		goto unlock;
+	}
+
+	ar->vif = conf->vif;
+	memcpy(ar->mac_addr, conf->mac_addr, ETH_ALEN);
+
+	if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) {
+		ar->rx_software_decryption = true;
+		ar->disable_offload = true;
+	}
+
+	ar->cur_filter = 0;
+	ar->want_filter = AR9170_MAC_REG_FTF_DEFAULTS;
+	err = ar9170_update_frame_filter(ar);
+	if (err)
+		goto unlock;
+
+	err = ar9170_set_operating_mode(ar);
+
+unlock:
+	mutex_unlock(&ar->mutex);
+	return err;
+}
+
+static void ar9170_op_remove_interface(struct ieee80211_hw *hw,
+				       struct ieee80211_if_init_conf *conf)
+{
+	struct ar9170 *ar = hw->priv;
+
+	mutex_lock(&ar->mutex);
+	ar->vif = NULL;
+	ar->want_filter = 0;
+	ar9170_update_frame_filter(ar);
+	ar9170_set_beacon_timers(ar);
+	dev_kfree_skb(ar->beacon);
+	ar->beacon = NULL;
+	ar->sniffer_enabled = false;
+	ar->rx_software_decryption = false;
+	ar9170_set_operating_mode(ar);
+	mutex_unlock(&ar->mutex);
+}
+
+static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed)
+{
+	struct ar9170 *ar = hw->priv;
+	int err = 0;
+
+	mutex_lock(&ar->mutex);
+
+	if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
+		/* TODO */
+		err = 0;
+	}
+
+	if (changed & IEEE80211_CONF_CHANGE_PS) {
+		/* TODO */
+		err = 0;
+	}
+
+	if (changed & IEEE80211_CONF_CHANGE_POWER) {
+		/* TODO */
+		err = 0;
+	}
+
+	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
+		/*
+		 * is it long_frame_max_tx_count or short_frame_max_tx_count?
+		 */
+
+		err = ar9170_set_hwretry_limit(ar,
+			ar->hw->conf.long_frame_max_tx_count);
+		if (err)
+			goto out;
+	}
+
+	if (changed & BSS_CHANGED_BEACON_INT) {
+		err = ar9170_set_beacon_timers(ar);
+		if (err)
+			goto out;
+	}
+
+	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
+
+		/* adjust slot time for 5 GHz */
+		err = ar9170_set_slot_time(ar);
+		if (err)
+			goto out;
+
+		err = ar9170_set_dyn_sifs_ack(ar);
+		if (err)
+			goto out;
+
+		err = ar9170_set_channel(ar, hw->conf.channel,
+				AR9170_RFI_NONE,
+				nl80211_to_ar9170(hw->conf.channel_type));
+		if (err)
+			goto out;
+	}
+
+out:
+	mutex_unlock(&ar->mutex);
+	return err;
+}
+
+static void ar9170_set_filters(struct work_struct *work)
+{
+	struct ar9170 *ar = container_of(work, struct ar9170,
+					 filter_config_work);
+	int err;
+
+	if (unlikely(!IS_STARTED(ar)))
+		return ;
+
+	mutex_lock(&ar->mutex);
+	if (test_and_clear_bit(AR9170_FILTER_CHANGED_MODE,
+			       &ar->filter_changed)) {
+		err = ar9170_set_operating_mode(ar);
+		if (err)
+			goto unlock;
+	}
+
+	if (test_and_clear_bit(AR9170_FILTER_CHANGED_MULTICAST,
+			       &ar->filter_changed)) {
+		err = ar9170_update_multicast(ar);
+		if (err)
+			goto unlock;
+	}
+
+	if (test_and_clear_bit(AR9170_FILTER_CHANGED_FRAMEFILTER,
+			       &ar->filter_changed)) {
+		err = ar9170_update_frame_filter(ar);
+		if (err)
+			goto unlock;
+	}
+
+unlock:
+	mutex_unlock(&ar->mutex);
+}
+
+static void ar9170_op_configure_filter(struct ieee80211_hw *hw,
+				       unsigned int changed_flags,
+				       unsigned int *new_flags,
+				       int mc_count, struct dev_mc_list *mclist)
+{
+	struct ar9170 *ar = hw->priv;
+
+	/* mask supported flags */
+	*new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC |
+		      FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL;
+	ar->filter_state = *new_flags;
+	/*
+	 * We can support more by setting the sniffer bit and
+	 * then checking the error flags, later.
+	 */
+
+	if (changed_flags & FIF_ALLMULTI) {
+		if (*new_flags & FIF_ALLMULTI) {
+			ar->want_mc_hash = ~0ULL;
+		} else {
+			u64 mchash;
+			int i;
+
+			/* always get broadcast frames */
+			mchash = 1ULL << (0xff >> 2);
+
+			for (i = 0; i < mc_count; i++) {
+				if (WARN_ON(!mclist))
+					break;
+				mchash |= 1ULL << (mclist->dmi_addr[5] >> 2);
+				mclist = mclist->next;
+			}
+		ar->want_mc_hash = mchash;
+		}
+		set_bit(AR9170_FILTER_CHANGED_MULTICAST, &ar->filter_changed);
+	}
+
+	if (changed_flags & FIF_CONTROL) {
+		u32 filter = AR9170_MAC_REG_FTF_PSPOLL |
+			     AR9170_MAC_REG_FTF_RTS |
+			     AR9170_MAC_REG_FTF_CTS |
+			     AR9170_MAC_REG_FTF_ACK |
+			     AR9170_MAC_REG_FTF_CFE |
+			     AR9170_MAC_REG_FTF_CFE_ACK;
+
+		if (*new_flags & FIF_CONTROL)
+			ar->want_filter = ar->cur_filter | filter;
+		else
+			ar->want_filter = ar->cur_filter & ~filter;
+
+		set_bit(AR9170_FILTER_CHANGED_FRAMEFILTER,
+			&ar->filter_changed);
+	}
+
+	if (changed_flags & FIF_PROMISC_IN_BSS) {
+		ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0;
+		set_bit(AR9170_FILTER_CHANGED_MODE,
+			&ar->filter_changed);
+	}
+
+	if (likely(IS_STARTED(ar)))
+		queue_work(ar->hw->workqueue, &ar->filter_config_work);
+}
+
+static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw,
+				       struct ieee80211_vif *vif,
+				       struct ieee80211_bss_conf *bss_conf,
+				       u32 changed)
+{
+	struct ar9170 *ar = hw->priv;
+	int err = 0;
+
+	mutex_lock(&ar->mutex);
+
+	if (changed & BSS_CHANGED_BSSID) {
+		memcpy(ar->bssid, bss_conf->bssid, ETH_ALEN);
+		err = ar9170_set_operating_mode(ar);
+		if (err)
+			goto out;
+	}
+
+	if (changed & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED)) {
+		err = ar9170_update_beacon(ar);
+		if (err)
+			goto out;
+
+		err = ar9170_set_beacon_timers(ar);
+		if (err)
+			goto out;
+	}
+
+	if (changed & BSS_CHANGED_ASSOC) {
+#ifndef CONFIG_AR9170_LEDS
+		/* enable assoc LED. */
+		err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0);
+#endif /* CONFIG_AR9170_LEDS */
+	}
+
+	if (changed & BSS_CHANGED_BEACON_INT) {
+		err = ar9170_set_beacon_timers(ar);
+		if (err)
+			goto out;
+	}
+
+	if (changed & BSS_CHANGED_HT) {
+		/* TODO */
+		err = 0;
+	}
+
+	if (changed & BSS_CHANGED_ERP_SLOT) {
+		err = ar9170_set_slot_time(ar);
+		if (err)
+			goto out;
+	}
+
+	if (changed & BSS_CHANGED_BASIC_RATES) {
+		err = ar9170_set_basic_rates(ar);
+		if (err)
+			goto out;
+	}
+
+out:
+	mutex_unlock(&ar->mutex);
+}
+
+static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw)
+{
+	struct ar9170 *ar = hw->priv;
+	int err;
+	u32 tsf_low;
+	u32 tsf_high;
+	u64 tsf;
+
+	mutex_lock(&ar->mutex);
+	err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_L, &tsf_low);
+	if (!err)
+		err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_H, &tsf_high);
+	mutex_unlock(&ar->mutex);
+
+	if (WARN_ON(err))
+		return 0;
+
+	tsf = tsf_high;
+	tsf = (tsf << 32) | tsf_low;
+	return tsf;
+}
+
+static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
+			  struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+			  struct ieee80211_key_conf *key)
+{
+	struct ar9170 *ar = hw->priv;
+	int err = 0, i;
+	u8 ktype;
+
+	if ((!ar->vif) || (ar->disable_offload))
+		return -EOPNOTSUPP;
+
+	switch (key->alg) {
+	case ALG_WEP:
+		if (key->keylen == WLAN_KEY_LEN_WEP40)
+			ktype = AR9170_ENC_ALG_WEP64;
+		else
+			ktype = AR9170_ENC_ALG_WEP128;
+		break;
+	case ALG_TKIP:
+		ktype = AR9170_ENC_ALG_TKIP;
+		break;
+	case ALG_CCMP:
+		ktype = AR9170_ENC_ALG_AESCCMP;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	mutex_lock(&ar->mutex);
+	if (cmd == SET_KEY) {
+		if (unlikely(!IS_STARTED(ar))) {
+			err = -EOPNOTSUPP;
+			goto out;
+		}
+
+		/* group keys need all-zeroes address */
+		if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
+			sta = NULL;
+
+		if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
+			for (i = 0; i < 64; i++)
+				if (!(ar->usedkeys & BIT(i)))
+					break;
+			if (i == 64) {
+				ar->rx_software_decryption = true;
+				ar9170_set_operating_mode(ar);
+				err = -ENOSPC;
+				goto out;
+			}
+		} else {
+			i = 64 + key->keyidx;
+		}
+
+		key->hw_key_idx = i;
+
+		err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0,
+					key->key, min_t(u8, 16, key->keylen));
+		if (err)
+			goto out;
+
+		if (key->alg == ALG_TKIP) {
+			err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL,
+						ktype, 1, key->key + 16, 16);
+			if (err)
+				goto out;
+
+			/*
+			 * hardware is not capable generating the MMIC
+			 * for fragmented frames!
+			 */
+			key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
+		}
+
+		if (i < 64)
+			ar->usedkeys |= BIT(i);
+
+		key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+	} else {
+		if (unlikely(!IS_STARTED(ar))) {
+			/* The device is gone... together with the key ;-) */
+			err = 0;
+			goto out;
+		}
+
+		err = ar9170_disable_key(ar, key->hw_key_idx);
+		if (err)
+			goto out;
+
+		if (key->hw_key_idx < 64) {
+			ar->usedkeys &= ~BIT(key->hw_key_idx);
+		} else {
+			err = ar9170_upload_key(ar, key->hw_key_idx, NULL,
+						AR9170_ENC_ALG_NONE, 0,
+						NULL, 0);
+			if (err)
+				goto out;
+
+			if (key->alg == ALG_TKIP) {
+				err = ar9170_upload_key(ar, key->hw_key_idx,
+							NULL,
+							AR9170_ENC_ALG_NONE, 1,
+							NULL, 0);
+				if (err)
+					goto out;
+			}
+
+		}
+	}
+
+	ar9170_regwrite_begin(ar);
+	ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys);
+	ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32);
+	ar9170_regwrite_finish();
+	err = ar9170_regwrite_result();
+
+out:
+	mutex_unlock(&ar->mutex);
+
+	return err;
+}
+
+static void ar9170_sta_notify(struct ieee80211_hw *hw,
+			      struct ieee80211_vif *vif,
+			      enum sta_notify_cmd cmd,
+			      struct ieee80211_sta *sta)
+{
+}
+
+static int ar9170_get_stats(struct ieee80211_hw *hw,
+			    struct ieee80211_low_level_stats *stats)
+{
+	struct ar9170 *ar = hw->priv;
+	u32 val;
+	int err;
+
+	mutex_lock(&ar->mutex);
+	err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val);
+	ar->stats.dot11ACKFailureCount += val;
+
+	memcpy(stats, &ar->stats, sizeof(*stats));
+	mutex_unlock(&ar->mutex);
+
+	return 0;
+}
+
+static int ar9170_get_tx_stats(struct ieee80211_hw *hw,
+			       struct ieee80211_tx_queue_stats *tx_stats)
+{
+	struct ar9170 *ar = hw->priv;
+
+	spin_lock_bh(&ar->tx_stats_lock);
+	memcpy(tx_stats, ar->tx_stats, sizeof(tx_stats[0]) * hw->queues);
+	spin_unlock_bh(&ar->tx_stats_lock);
+
+	return 0;
+}
+
+static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue,
+			  const struct ieee80211_tx_queue_params *param)
+{
+	struct ar9170 *ar = hw->priv;
+	int ret;
+
+	mutex_lock(&ar->mutex);
+	if ((param) && !(queue > __AR9170_NUM_TXQ)) {
+		memcpy(&ar->edcf[ar9170_qos_hwmap[queue]],
+		       param, sizeof(*param));
+
+		ret = ar9170_set_qos(ar);
+	} else
+		ret = -EINVAL;
+
+	mutex_unlock(&ar->mutex);
+	return ret;
+}
+
+static int ar9170_ampdu_action(struct ieee80211_hw *hw,
+			       enum ieee80211_ampdu_mlme_action action,
+			       struct ieee80211_sta *sta, u16 tid, u16 *ssn)
+{
+	switch (action) {
+	case IEEE80211_AMPDU_RX_START:
+	case IEEE80211_AMPDU_RX_STOP:
+		/*
+		 * Something goes wrong -- RX locks up
+		 * after a while of receiving aggregated
+		 * frames -- not enabling for now.
+		 */
+		return -EOPNOTSUPP;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static const struct ieee80211_ops ar9170_ops = {
+	.start			= ar9170_op_start,
+	.stop			= ar9170_op_stop,
+	.tx			= ar9170_op_tx,
+	.add_interface		= ar9170_op_add_interface,
+	.remove_interface	= ar9170_op_remove_interface,
+	.config			= ar9170_op_config,
+	.configure_filter	= ar9170_op_configure_filter,
+	.conf_tx		= ar9170_conf_tx,
+	.bss_info_changed	= ar9170_op_bss_info_changed,
+	.get_tsf		= ar9170_op_get_tsf,
+	.set_key		= ar9170_set_key,
+	.sta_notify		= ar9170_sta_notify,
+	.get_stats		= ar9170_get_stats,
+	.get_tx_stats		= ar9170_get_tx_stats,
+	.ampdu_action		= ar9170_ampdu_action,
+};
+
+void *ar9170_alloc(size_t priv_size)
+{
+	struct ieee80211_hw *hw;
+	struct ar9170 *ar;
+	struct sk_buff *skb;
+	int i;
+
+	/*
+	 * this buffer is used for rx stream reconstruction.
+	 * Under heavy load this device (or the transport layer?)
+	 * tends to split the streams into seperate rx descriptors.
+	 */
+
+	skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL);
+	if (!skb)
+		goto err_nomem;
+
+	hw = ieee80211_alloc_hw(priv_size, &ar9170_ops);
+	if (!hw)
+		goto err_nomem;
+
+	ar = hw->priv;
+	ar->hw = hw;
+	ar->rx_failover = skb;
+
+	mutex_init(&ar->mutex);
+	spin_lock_init(&ar->cmdlock);
+	spin_lock_init(&ar->tx_stats_lock);
+	for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+		skb_queue_head_init(&ar->tx_status[i]);
+		skb_queue_head_init(&ar->tx_pending[i]);
+	}
+	ar9170_rx_reset_rx_mpdu(ar);
+	INIT_WORK(&ar->filter_config_work, ar9170_set_filters);
+	INIT_WORK(&ar->beacon_work, ar9170_new_beacon);
+	INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor);
+
+	/* all hw supports 2.4 GHz, so set channel to 1 by default */
+	ar->channel = &ar9170_2ghz_chantable[0];
+
+	/* first part of wiphy init */
+	ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
+					 BIT(NL80211_IFTYPE_WDS) |
+					 BIT(NL80211_IFTYPE_ADHOC);
+	ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
+			 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
+			 IEEE80211_HW_SIGNAL_DBM |
+			 IEEE80211_HW_NOISE_DBM;
+
+	ar->hw->queues = __AR9170_NUM_TXQ;
+	ar->hw->extra_tx_headroom = 8;
+	ar->hw->sta_data_size = sizeof(struct ar9170_sta_info);
+
+	ar->hw->max_rates = 1;
+	ar->hw->max_rate_tries = 3;
+
+	for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
+		ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
+
+	return ar;
+
+err_nomem:
+	kfree_skb(skb);
+	return ERR_PTR(-ENOMEM);
+}
+
+static int ar9170_read_eeprom(struct ar9170 *ar)
+{
+#define RW	8	/* number of words to read at once */
+#define RB	(sizeof(u32) * RW)
+	DECLARE_MAC_BUF(mbuf);
+	u8 *eeprom = (void *)&ar->eeprom;
+	u8 *addr = ar->eeprom.mac_address;
+	__le32 offsets[RW];
+	int i, j, err, bands = 0;
+
+	BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
+
+	BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4);
+#ifndef __CHECKER__
+	/* don't want to handle trailing remains */
+	BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
+#endif
+
+	for (i = 0; i < sizeof(ar->eeprom)/RB; i++) {
+		for (j = 0; j < RW; j++)
+			offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
+						 RB * i + 4 * j);
+
+		err = ar->exec_cmd(ar, AR9170_CMD_RREG,
+				   RB, (u8 *) &offsets,
+				   RB, eeprom + RB * i);
+		if (err)
+			return err;
+	}
+
+#undef RW
+#undef RB
+
+	if (ar->eeprom.length == cpu_to_le16(0xFFFF))
+		return -ENODATA;
+
+	if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
+		ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz;
+		bands++;
+	}
+	if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
+		ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz;
+		bands++;
+	}
+	/*
+	 * I measured this, a bandswitch takes roughly
+	 * 135 ms and a frequency switch about 80.
+	 *
+	 * FIXME: measure these values again once EEPROM settings
+	 *	  are used, that will influence them!
+	 */
+	if (bands == 2)
+		ar->hw->channel_change_time = 135 * 1000;
+	else
+		ar->hw->channel_change_time = 80 * 1000;
+
+	ar->regulatory.current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
+	ar->regulatory.current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]);
+
+	/* second part of wiphy init */
+	SET_IEEE80211_PERM_ADDR(ar->hw, addr);
+
+	return bands ? 0 : -EINVAL;
+}
+
+static int ar9170_reg_notifier(struct wiphy *wiphy,
+			struct regulatory_request *request)
+{
+	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+	struct ar9170 *ar = hw->priv;
+
+	return ath_reg_notifier_apply(wiphy, request, &ar->regulatory);
+}
+
+int ar9170_register(struct ar9170 *ar, struct device *pdev)
+{
+	int err;
+
+	/* try to read EEPROM, init MAC addr */
+	err = ar9170_read_eeprom(ar);
+	if (err)
+		goto err_out;
+
+	err = ath_regd_init(&ar->regulatory, ar->hw->wiphy,
+			    ar9170_reg_notifier);
+	if (err)
+		goto err_out;
+
+	err = ieee80211_register_hw(ar->hw);
+	if (err)
+		goto err_out;
+
+	if (!ath_is_world_regd(&ar->regulatory))
+		regulatory_hint(ar->hw->wiphy, ar->regulatory.alpha2);
+
+	err = ar9170_init_leds(ar);
+	if (err)
+		goto err_unreg;
+
+#ifdef CONFIG_AR9170_LEDS
+	err = ar9170_register_leds(ar);
+	if (err)
+		goto err_unreg;
+#endif /* CONFIG_AR9170_LEDS */
+
+	dev_info(pdev, "Atheros AR9170 is registered as '%s'\n",
+		 wiphy_name(ar->hw->wiphy));
+
+	return err;
+
+err_unreg:
+	ieee80211_unregister_hw(ar->hw);
+
+err_out:
+	return err;
+}
+
+void ar9170_unregister(struct ar9170 *ar)
+{
+#ifdef CONFIG_AR9170_LEDS
+	ar9170_unregister_leds(ar);
+#endif /* CONFIG_AR9170_LEDS */
+
+	kfree_skb(ar->rx_failover);
+	ieee80211_unregister_hw(ar->hw);
+	mutex_destroy(&ar->mutex);
+}