zd1211rw: port to mac80211

This seems to be working smoothly now. Let's not hold back the mac80211
transition any further. This patch ports the existing driver from softmac
to mac80211.

Many thanks to everyone who helped out with the porting efforts.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 579 insertions, 957 deletions

diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c
index 5298a8bf112..aaffd081b1b 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.c
+++ b/drivers/net/wireless/zd1211rw/zd_mac.c
@@ -1,5 +1,7 @@
 /* zd_mac.c
  *
+ * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
+ *
  * 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
@@ -17,7 +19,6 @@
 
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
-#include <linux/wireless.h>
 #include <linux/usb.h>
 #include <linux/jiffies.h>
 #include <net/ieee80211_radiotap.h>
@@ -26,81 +27,105 @@
 #include "zd_chip.h"
 #include "zd_mac.h"
 #include "zd_ieee80211.h"
-#include "zd_netdev.h"
 #include "zd_rf.h"
 
-static void ieee_init(struct ieee80211_device *ieee);
-static void softmac_init(struct ieee80211softmac_device *sm);
-static void set_rts_cts_work(struct work_struct *work);
-static void set_basic_rates_work(struct work_struct *work);
+/* This table contains the hardware specific values for the modulation rates. */
+static const struct ieee80211_rate zd_rates[] = {
+	{ .rate = 10,
+	  .val = ZD_CCK_RATE_1M,
+	  .flags = IEEE80211_RATE_CCK },
+	{ .rate = 20,
+	  .val = ZD_CCK_RATE_2M,
+	  .val2 = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT,
+	  .flags = IEEE80211_RATE_CCK_2 },
+	{ .rate = 55,
+	  .val = ZD_CCK_RATE_5_5M,
+	  .val2 = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT,
+	  .flags = IEEE80211_RATE_CCK_2 },
+	{ .rate = 110,
+	  .val = ZD_CCK_RATE_11M,
+	  .val2 = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT,
+	  .flags = IEEE80211_RATE_CCK_2 },
+	{ .rate = 60,
+	  .val = ZD_OFDM_RATE_6M,
+	  .flags = IEEE80211_RATE_OFDM },
+	{ .rate = 90,
+	  .val = ZD_OFDM_RATE_9M,
+	  .flags = IEEE80211_RATE_OFDM },
+	{ .rate = 120,
+	  .val = ZD_OFDM_RATE_12M,
+	  .flags = IEEE80211_RATE_OFDM },
+	{ .rate = 180,
+	  .val = ZD_OFDM_RATE_18M,
+	  .flags = IEEE80211_RATE_OFDM },
+	{ .rate = 240,
+	  .val = ZD_OFDM_RATE_24M,
+	  .flags = IEEE80211_RATE_OFDM },
+	{ .rate = 360,
+	  .val = ZD_OFDM_RATE_36M,
+	  .flags = IEEE80211_RATE_OFDM },
+	{ .rate = 480,
+	  .val = ZD_OFDM_RATE_48M,
+	  .flags = IEEE80211_RATE_OFDM },
+	{ .rate = 540,
+	  .val = ZD_OFDM_RATE_54M,
+	  .flags = IEEE80211_RATE_OFDM },
+};
+
+static const struct ieee80211_channel zd_channels[] = {
+	{ .chan = 1,
+	  .freq = 2412},
+	{ .chan = 2,
+	  .freq = 2417},
+	{ .chan = 3,
+	  .freq = 2422},
+	{ .chan = 4,
+	  .freq = 2427},
+	{ .chan = 5,
+	  .freq = 2432},
+	{ .chan = 6,
+	  .freq = 2437},
+	{ .chan = 7,
+	  .freq = 2442},
+	{ .chan = 8,
+	  .freq = 2447},
+	{ .chan = 9,
+	  .freq = 2452},
+	{ .chan = 10,
+	  .freq = 2457},
+	{ .chan = 11,
+	  .freq = 2462},
+	{ .chan = 12,
+	  .freq = 2467},
+	{ .chan = 13,
+	  .freq = 2472},
+	{ .chan = 14,
+	  .freq = 2484}
+};
 
 static void housekeeping_init(struct zd_mac *mac);
 static void housekeeping_enable(struct zd_mac *mac);
 static void housekeeping_disable(struct zd_mac *mac);
 
-static void set_multicast_hash_handler(struct work_struct *work);
-
-static void do_rx(unsigned long mac_ptr);
-
-int zd_mac_init(struct zd_mac *mac,
-	        struct net_device *netdev,
-	        struct usb_interface *intf)
-{
-	struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
-
-	memset(mac, 0, sizeof(*mac));
-	spin_lock_init(&mac->lock);
-	mac->netdev = netdev;
-	INIT_DELAYED_WORK(&mac->set_rts_cts_work, set_rts_cts_work);
-	INIT_DELAYED_WORK(&mac->set_basic_rates_work, set_basic_rates_work);
-
-	skb_queue_head_init(&mac->rx_queue);
-	tasklet_init(&mac->rx_tasklet, do_rx, (unsigned long)mac);
-	tasklet_disable(&mac->rx_tasklet);
-
-	ieee_init(ieee);
-	softmac_init(ieee80211_priv(netdev));
-	zd_chip_init(&mac->chip, netdev, intf);
-	housekeeping_init(mac);
-	INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler);
-	return 0;
-}
-
-static int reset_channel(struct zd_mac *mac)
-{
-	int r;
-	unsigned long flags;
-	const struct channel_range *range;
-
-	spin_lock_irqsave(&mac->lock, flags);
-	range = zd_channel_range(mac->regdomain);
-	if (!range->start) {
-		r = -EINVAL;
-		goto out;
-	}
-	mac->requested_channel = range->start;
-	r = 0;
-out:
-	spin_unlock_irqrestore(&mac->lock, flags);
-	return r;
-}
-
-int zd_mac_preinit_hw(struct zd_mac *mac)
+int zd_mac_preinit_hw(struct ieee80211_hw *hw)
 {
 	int r;
 	u8 addr[ETH_ALEN];
+	struct zd_mac *mac = zd_hw_mac(hw);
 
 	r = zd_chip_read_mac_addr_fw(&mac->chip, addr);
 	if (r)
 		return r;
 
-	memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
+	SET_IEEE80211_PERM_ADDR(hw, addr);
+
 	return 0;
 }
 
-int zd_mac_init_hw(struct zd_mac *mac)
+int zd_mac_init_hw(struct ieee80211_hw *hw)
 {
 	int r;
+	struct zd_mac *mac = zd_hw_mac(hw);
 	struct zd_chip *chip = &mac->chip;
 	u8 default_regdomain;
 
@@ -116,22 +141,9 @@ int zd_mac_init_hw(struct zd_mac *mac)
 	r = zd_read_regdomain(chip, &default_regdomain);
 	if (r)
 		goto disable_int;
-	if (!zd_regdomain_supported(default_regdomain)) {
-		/* The vendor driver overrides the regulatory domain and
-		 * allowed channel registers and unconditionally restricts
-		 * available channels to 1-11 everywhere. Match their
-		 * questionable behaviour only for regdomains which we don't
-		 * recognise. */
-		dev_warn(zd_mac_dev(mac),  "Unrecognised regulatory domain: "
-			"%#04x. Defaulting to FCC.\n", default_regdomain);
-		default_regdomain = ZD_REGDOMAIN_FCC;
-	}
 	spin_lock_irq(&mac->lock);
 	mac->regdomain = mac->default_regdomain = default_regdomain;
 	spin_unlock_irq(&mac->lock);
-	r = reset_channel(mac);
-	if (r)
-		goto disable_int;
 
 	/* We must inform the device that we are doing encryption/decryption in
 	 * software at the moment. */
@@ -139,9 +151,7 @@ int zd_mac_init_hw(struct zd_mac *mac)
 	if (r)
 		goto disable_int;
 
-	r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
-	if (r)
-		goto disable_int;
+	zd_geo_init(hw, mac->regdomain);
 
 	r = 0;
 disable_int:
@@ -153,8 +163,6 @@ out:
 void zd_mac_clear(struct zd_mac *mac)
 {
 	flush_workqueue(zd_workqueue);
-	skb_queue_purge(&mac->rx_queue);
-	tasklet_kill(&mac->rx_tasklet);
 	zd_chip_clear(&mac->chip);
 	ZD_ASSERT(!spin_is_locked(&mac->lock));
 	ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
@@ -162,34 +170,27 @@ void zd_mac_clear(struct zd_mac *mac)
 
 static int set_rx_filter(struct zd_mac *mac)
 {
-	struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
-	u32 filter = (ieee->iw_mode == IW_MODE_MONITOR) ? ~0 : STA_RX_FILTER;
-	return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter);
-}
+	unsigned long flags;
+	u32 filter = STA_RX_FILTER;
 
-static int set_sniffer(struct zd_mac *mac)
-{
-	struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
-	return zd_iowrite32(&mac->chip, CR_SNIFFER_ON,
-		ieee->iw_mode == IW_MODE_MONITOR ? 1 : 0);
-	return 0;
+	spin_lock_irqsave(&mac->lock, flags);
+	if (mac->pass_ctrl)
+		filter |= RX_FILTER_CTRL;
+	spin_unlock_irqrestore(&mac->lock, flags);
+
+	return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter);
 }
 
 static int set_mc_hash(struct zd_mac *mac)
 {
 	struct zd_mc_hash hash;
-	struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
-
 	zd_mc_clear(&hash);
-	if (ieee->iw_mode == IW_MODE_MONITOR)
-		zd_mc_add_all(&hash);
-
 	return zd_chip_set_multicast_hash(&mac->chip, &hash);
 }
 
-int zd_mac_open(struct net_device *netdev)
+static int zd_op_start(struct ieee80211_hw *hw)
 {
-	struct zd_mac *mac = zd_netdev_mac(netdev);
+	struct zd_mac *mac = zd_hw_mac(hw);
 	struct zd_chip *chip = &mac->chip;
 	struct zd_usb *usb = &chip->usb;
 	int r;
@@ -200,46 +201,33 @@ int zd_mac_open(struct net_device *netdev)
 			goto out;
 	}
 
-	tasklet_enable(&mac->rx_tasklet);
-
 	r = zd_chip_enable_int(chip);
 	if (r < 0)
 		goto out;
 
-	r = zd_write_mac_addr(chip, netdev->dev_addr);
-	if (r)
-		goto disable_int;
-
 	r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
 	if (r < 0)
 		goto disable_int;
 	r = set_rx_filter(mac);
 	if (r)
 		goto disable_int;
-	r = set_sniffer(mac);
-	if (r)
-		goto disable_int;
 	r = set_mc_hash(mac);
 	if (r)
 		goto disable_int;
 	r = zd_chip_switch_radio_on(chip);
 	if (r < 0)
 		goto disable_int;
-	r = zd_chip_set_channel(chip, mac->requested_channel);
-	if (r < 0)
-		goto disable_radio;
-	r = zd_chip_enable_rx(chip);
+	r = zd_chip_enable_rxtx(chip);
 	if (r < 0)
 		goto disable_radio;
 	r = zd_chip_enable_hwint(chip);
 	if (r < 0)
-		goto disable_rx;
+		goto disable_rxtx;
 
 	housekeeping_enable(mac);
-	ieee80211softmac_start(netdev);
 	return 0;
-disable_rx:
-	zd_chip_disable_rx(chip);
+disable_rxtx:
+	zd_chip_disable_rxtx(chip);
 disable_radio:
 	zd_chip_switch_radio_off(chip);
 disable_int:
@@ -248,494 +236,190 @@ out:
 	return r;
 }
 
-int zd_mac_stop(struct net_device *netdev)
+/**
+ * clear_tx_skb_control_block - clears the control block of tx skbuffs
+ * @skb: a &struct sk_buff pointer
+ *
+ * This clears the control block of skbuff buffers, which were transmitted to
+ * the device. Notify that the function is not thread-safe, so prevent
+ * multiple calls.
+ */
+static void clear_tx_skb_control_block(struct sk_buff *skb)
+{
+	struct zd_tx_skb_control_block *cb =
+		(struct zd_tx_skb_control_block *)skb->cb;
+
+	kfree(cb->control);
+	cb->control = NULL;
+}
+
+/**
+ * kfree_tx_skb - frees a tx skbuff
+ * @skb: a &struct sk_buff pointer
+ *
+ * Frees the tx skbuff. Frees also the allocated control structure in the
+ * control block if necessary.
+ */
+static void kfree_tx_skb(struct sk_buff *skb)
 {
-	struct zd_mac *mac = zd_netdev_mac(netdev);
-	struct zd_chip *chip = &mac->chip;
+	clear_tx_skb_control_block(skb);
+	dev_kfree_skb_any(skb);
+}
 
-	netif_stop_queue(netdev);
+static void zd_op_stop(struct ieee80211_hw *hw)
+{
+	struct zd_mac *mac = zd_hw_mac(hw);
+	struct zd_chip *chip = &mac->chip;
+	struct sk_buff *skb;
+	struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue;
 
-	/*
-	 * The order here deliberately is a little different from the open()
+	/* The order here deliberately is a little different from the open()
 	 * method, since we need to make sure there is no opportunity for RX
-	 * frames to be processed by softmac after we have stopped it.
+	 * frames to be processed by mac80211 after we have stopped it.
 	 */
 
-	zd_chip_disable_rx(chip);
-	skb_queue_purge(&mac->rx_queue);
-	tasklet_disable(&mac->rx_tasklet);
+	zd_chip_disable_rxtx(chip);
 	housekeeping_disable(mac);
-	ieee80211softmac_stop(netdev);
-
-	/* Ensure no work items are running or queued from this point */
-	cancel_delayed_work(&mac->set_rts_cts_work);
-	cancel_delayed_work(&mac->set_basic_rates_work);
 	flush_workqueue(zd_workqueue);
-	mac->updating_rts_rate = 0;
-	mac->updating_basic_rates = 0;
 
 	zd_chip_disable_hwint(chip);
 	zd_chip_switch_radio_off(chip);
 	zd_chip_disable_int(chip);
 
-	return 0;
-}
-
-int zd_mac_set_mac_address(struct net_device *netdev, void *p)
-{
-	int r;
-	unsigned long flags;
-	struct sockaddr *addr = p;
-	struct zd_mac *mac = zd_netdev_mac(netdev);
-	struct zd_chip *chip = &mac->chip;
-	DECLARE_MAC_BUF(mac2);
 
-	if (!is_valid_ether_addr(addr->sa_data))
-		return -EADDRNOTAVAIL;
-
-	dev_dbg_f(zd_mac_dev(mac),
-		  "Setting MAC to %s\n", print_mac(mac2, addr->sa_data));
-
-	if (netdev->flags & IFF_UP) {
-		r = zd_write_mac_addr(chip, addr->sa_data);
-		if (r)
-			return r;
-	}
-
-	spin_lock_irqsave(&mac->lock, flags);
-	memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
-	spin_unlock_irqrestore(&mac->lock, flags);
-
-	return 0;
-}
-
-static void set_multicast_hash_handler(struct work_struct *work)
-{
-	struct zd_mac *mac = container_of(work, struct zd_mac,
-					  set_multicast_hash_work);
-	struct zd_mc_hash hash;
-
-	spin_lock_irq(&mac->lock);
-	hash = mac->multicast_hash;
-	spin_unlock_irq(&mac->lock);
-
-	zd_chip_set_multicast_hash(&mac->chip, &hash);
-}
-
-void zd_mac_set_multicast_list(struct net_device *dev)
-{
-	struct zd_mac *mac = zd_netdev_mac(dev);
-	struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
-	struct zd_mc_hash hash;
-	struct dev_mc_list *mc;
-	unsigned long flags;
-	DECLARE_MAC_BUF(mac2);
-
-	if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI) ||
-			ieee->iw_mode == IW_MODE_MONITOR) {
-		zd_mc_add_all(&hash);
-	} else {
-		zd_mc_clear(&hash);
-		for (mc = dev->mc_list; mc; mc = mc->next) {
-			dev_dbg_f(zd_mac_dev(mac), "mc addr %s\n",
-				  print_mac(mac2, mc->dmi_addr));
-			zd_mc_add_addr(&hash, mc->dmi_addr);
-		}
-	}
-
-	spin_lock_irqsave(&mac->lock, flags);
-	mac->multicast_hash = hash;
-	spin_unlock_irqrestore(&mac->lock, flags);
-	queue_work(zd_workqueue, &mac->set_multicast_hash_work);
+	while ((skb = skb_dequeue(ack_wait_queue)))
+		kfree_tx_skb(skb);
 }
 
-int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
-{
-	int r;
-	u8 channel;
-
-	ZD_ASSERT(!irqs_disabled());
-	spin_lock_irq(&mac->lock);
-	if (regdomain == 0) {
-		regdomain = mac->default_regdomain;
-	}
-	if (!zd_regdomain_supported(regdomain)) {
-		spin_unlock_irq(&mac->lock);
-		return -EINVAL;
-	}
-	mac->regdomain = regdomain;
-	channel = mac->requested_channel;
-	spin_unlock_irq(&mac->lock);
-
-	r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
-	if (r)
-		return r;
-	if (!zd_regdomain_supports_channel(regdomain, channel)) {
-		r = reset_channel(mac);
-		if (r)
-			return r;
-	}
+/**
+ * init_tx_skb_control_block - initializes skb control block
+ * @skb: a &sk_buff pointer
+ * @dev: pointer to the mac80221 device
+ * @control: mac80211 tx control applying for the frame in @skb
+ *
+ * Initializes the control block of the skbuff to be transmitted.
+ */
+static int init_tx_skb_control_block(struct sk_buff *skb,
+				     struct ieee80211_hw *hw,
+	                             struct ieee80211_tx_control *control)
+{
+	struct zd_tx_skb_control_block *cb =
+		(struct zd_tx_skb_control_block *)skb->cb;
+
+	ZD_ASSERT(sizeof(*cb) <= sizeof(skb->cb));
+	memset(cb, 0, sizeof(*cb));
+	cb->hw= hw;
+	cb->control = kmalloc(sizeof(*control), GFP_ATOMIC);
+	if (cb->control == NULL)
+		return -ENOMEM;
+	memcpy(cb->control, control, sizeof(*control));
 
 	return 0;
 }
 
-u8 zd_mac_get_regdomain(struct zd_mac *mac)
-{
-	unsigned long flags;
-	u8 regdomain;
-
-	spin_lock_irqsave(&mac->lock, flags);
-	regdomain = mac->regdomain;
-	spin_unlock_irqrestore(&mac->lock, flags);
-	return regdomain;
-}
-
-/* Fallback to lowest rate, if rate is unknown. */
-static u8 rate_to_zd_rate(u8 rate)
-{
-	switch (rate) {
-	case IEEE80211_CCK_RATE_2MB:
-		return ZD_CCK_RATE_2M;
-	case IEEE80211_CCK_RATE_5MB:
-		return ZD_CCK_RATE_5_5M;
-	case IEEE80211_CCK_RATE_11MB:
-		return ZD_CCK_RATE_11M;
-	case IEEE80211_OFDM_RATE_6MB:
-		return ZD_OFDM_RATE_6M;
-	case IEEE80211_OFDM_RATE_9MB:
-		return ZD_OFDM_RATE_9M;
-	case IEEE80211_OFDM_RATE_12MB:
-		return ZD_OFDM_RATE_12M;
-	case IEEE80211_OFDM_RATE_18MB:
-		return ZD_OFDM_RATE_18M;
-	case IEEE80211_OFDM_RATE_24MB:
-		return ZD_OFDM_RATE_24M;
-	case IEEE80211_OFDM_RATE_36MB:
-		return ZD_OFDM_RATE_36M;
-	case IEEE80211_OFDM_RATE_48MB:
-		return ZD_OFDM_RATE_48M;
-	case IEEE80211_OFDM_RATE_54MB:
-		return ZD_OFDM_RATE_54M;
-	}
-	return ZD_CCK_RATE_1M;
-}
-
-static u16 rate_to_cr_rate(u8 rate)
-{
-	switch (rate) {
-	case IEEE80211_CCK_RATE_2MB:
-		return CR_RATE_1M;
-	case IEEE80211_CCK_RATE_5MB:
-		return CR_RATE_5_5M;
-	case IEEE80211_CCK_RATE_11MB:
-		return CR_RATE_11M;
-	case IEEE80211_OFDM_RATE_6MB:
-		return CR_RATE_6M;
-	case IEEE80211_OFDM_RATE_9MB:
-		return CR_RATE_9M;
-	case IEEE80211_OFDM_RATE_12MB:
-		return CR_RATE_12M;
-	case IEEE80211_OFDM_RATE_18MB:
-		return CR_RATE_18M;
-	case IEEE80211_OFDM_RATE_24MB:
-		return CR_RATE_24M;
-	case IEEE80211_OFDM_RATE_36MB:
-		return CR_RATE_36M;
-	case IEEE80211_OFDM_RATE_48MB:
-		return CR_RATE_48M;
-	case IEEE80211_OFDM_RATE_54MB:
-		return CR_RATE_54M;
-	}
-	return CR_RATE_1M;
-}
-
-static void try_enable_tx(struct zd_mac *mac)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&mac->lock, flags);
-	if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
-		netif_wake_queue(mac->netdev);
-	spin_unlock_irqrestore(&mac->lock, flags);
-}
-
-static void set_rts_cts_work(struct work_struct *work)
+/**
+ * tx_status - reports tx status of a packet if required
+ * @hw - a &struct ieee80211_hw pointer
+ * @skb - a sk-buffer
+ * @status - the tx status of the packet without control information
+ * @success - True for successfull transmission of the frame
+ *
+ * This information calls ieee80211_tx_status_irqsafe() if required by the
+ * control information. It copies the control information into the status
+ * information.
+ *
+ * If no status information has been requested, the skb is freed.
+ */
+static void tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
+	              struct ieee80211_tx_status *status,
+		      bool success)
 {
-	struct zd_mac *mac =
-		container_of(work, struct zd_mac, set_rts_cts_work.work);
-	unsigned long flags;
-	u8 rts_rate;
-	unsigned int short_preamble;
-
-	mutex_lock(&mac->chip.mutex);
-
-	spin_lock_irqsave(&mac->lock, flags);
-	mac->updating_rts_rate = 0;
-	rts_rate = mac->rts_rate;
-	short_preamble = mac->short_preamble;
-	spin_unlock_irqrestore(&mac->lock, flags);
-
-	zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
-	mutex_unlock(&mac->chip.mutex);
+	struct zd_tx_skb_control_block *cb = (struct zd_tx_skb_control_block *)
+		skb->cb;
 
-	try_enable_tx(mac);
+	ZD_ASSERT(cb->control != NULL);
+	memcpy(&status->control, cb->control, sizeof(status->control));
+	if (!success)
+		status->excessive_retries = 1;
+	clear_tx_skb_control_block(skb);
+	ieee80211_tx_status_irqsafe(hw, skb, status);
 }
 
-static void set_basic_rates_work(struct work_struct *work)
+/**
+ * zd_mac_tx_failed - callback for failed frames
+ * @dev: the mac80211 wireless device
+ *
+ * This function is called if a frame couldn't be succesfully be
+ * transferred. The first frame from the tx queue, will be selected and
+ * reported as error to the upper layers.
+ */
+void zd_mac_tx_failed(struct ieee80211_hw *hw)
 {
-	struct zd_mac *mac =
-		container_of(work, struct zd_mac, set_basic_rates_work.work);
-	unsigned long flags;
-	u16 basic_rates;
-
-	mutex_lock(&mac->chip.mutex);
-
-	spin_lock_irqsave(&mac->lock, flags);
-	mac->updating_basic_rates = 0;
-	basic_rates = mac->basic_rates;
-	spin_unlock_irqrestore(&mac->lock, flags);
-
-	zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
-	mutex_unlock(&mac->chip.mutex);
+	struct sk_buff_head *q = &zd_hw_mac(hw)->ack_wait_queue;
+	struct sk_buff *skb;
+	struct ieee80211_tx_status status = {{0}};
 
-	try_enable_tx(mac);
+	skb = skb_dequeue(q);
+	if (skb == NULL)
+		return;
+	tx_status(hw, skb, &status, 0);
 }
 
-static void bssinfo_change(struct net_device *netdev, u32 changes)
-{
-	struct zd_mac *mac = zd_netdev_mac(netdev);
-	struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
-	struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
-	int need_set_rts_cts = 0;
-	int need_set_rates = 0;
-	u16 basic_rates;
-	unsigned long flags;
-
-	dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
-
-	if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
-		spin_lock_irqsave(&mac->lock, flags);
-		mac->short_preamble = bssinfo->short_preamble;
-		spin_unlock_irqrestore(&mac->lock, flags);
-		need_set_rts_cts = 1;
-	}
-
-	if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
-		/* Set RTS rate to highest available basic rate */
-		u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac,
-			&bssinfo->supported_rates, 1);
-		hi_rate = rate_to_zd_rate(hi_rate);
-
-		spin_lock_irqsave(&mac->lock, flags);
-		if (hi_rate != mac->rts_rate) {
-			mac->rts_rate = hi_rate;
-			need_set_rts_cts = 1;
-		}
-		spin_unlock_irqrestore(&mac->lock, flags);
-
-		/* Set basic rates */
-		need_set_rates = 1;
-		if (bssinfo->supported_rates.count == 0) {
-			/* Allow the device to be flexible */
-			basic_rates = CR_RATES_80211B | CR_RATES_80211G;
+/**
+ * zd_mac_tx_to_dev - callback for USB layer
+ * @skb: a &sk_buff pointer
+ * @error: error value, 0 if transmission successful
+ *
+ * Informs the MAC layer that the frame has successfully transferred to the
+ * device. If an ACK is required and the transfer to the device has been
+ * successful, the packets are put on the @ack_wait_queue with
+ * the control set removed.
+ */
+void zd_mac_tx_to_dev(struct sk_buff *skb, int error)
+{
+	struct zd_tx_skb_control_block *cb =
+		(struct zd_tx_skb_control_block *)skb->cb;
+	struct ieee80211_hw *hw = cb->hw;
+
+	if (likely(cb->control)) {
+		skb_pull(skb, sizeof(struct zd_ctrlset));
+		if (unlikely(error ||
+		    (cb->control->flags & IEEE80211_TXCTL_NO_ACK)))
+		{
+			struct ieee80211_tx_status status = {{0}};
+			tx_status(hw, skb, &status, !error);
 		} else {
-			int i = 0;
-			basic_rates = 0;
+			struct sk_buff_head *q =
+				&zd_hw_mac(hw)->ack_wait_queue;
 
-			for (i = 0; i < bssinfo->supported_rates.count; i++) {
-				u16 rate = bssinfo->supported_rates.rates[i];
-				if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
-					continue;
-
-				rate &= ~IEEE80211_BASIC_RATE_MASK;
-				basic_rates |= rate_to_cr_rate(rate);
-			}
+			skb_queue_tail(q, skb);
+			while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS)
+				zd_mac_tx_failed(hw);
 		}
-		spin_lock_irqsave(&mac->lock, flags);
-		mac->basic_rates = basic_rates;
-		spin_unlock_irqrestore(&mac->lock, flags);
-	}
-
-	/* Schedule any changes we made above */
-
-	spin_lock_irqsave(&mac->lock, flags);
-	if (need_set_rts_cts && !mac->updating_rts_rate) {
-		mac->updating_rts_rate = 1;
-		netif_stop_queue(mac->netdev);
-		queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0);
-	}
-	if (need_set_rates && !mac->updating_basic_rates) {
-		mac->updating_basic_rates = 1;
-		netif_stop_queue(mac->netdev);
-		queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work,
-				   0);
-	}
-	spin_unlock_irqrestore(&mac->lock, flags);
-}
-
-static void set_channel(struct net_device *netdev, u8 channel)
-{
-	struct zd_mac *mac = zd_netdev_mac(netdev);
-
-	dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
-
-	zd_chip_set_channel(&mac->chip, channel);
-}
-
-int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
-{
-	unsigned long lock_flags;
-	struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
-
-	if (ieee->iw_mode == IW_MODE_INFRA)
-		return -EPERM;
-
-	spin_lock_irqsave(&mac->lock, lock_flags);
-	if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
-		spin_unlock_irqrestore(&mac->lock, lock_flags);
-		return -EINVAL;
-	}
-	mac->requested_channel = channel;
-	spin_unlock_irqrestore(&mac->lock, lock_flags);
-	if (netif_running(mac->netdev))
-		return zd_chip_set_channel(&mac->chip, channel);
-	else
-		return 0;
-}
-
-u8 zd_mac_get_channel(struct zd_mac *mac)
-{
-	u8 channel = zd_chip_get_channel(&mac->chip);
-
-	dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel);
-	return channel;
-}
-
-int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
-{
-	struct ieee80211_device *ieee;
-
-	switch (mode) {
-	case IW_MODE_AUTO:
-	case IW_MODE_ADHOC:
-	case IW_MODE_INFRA:
-		mac->netdev->type = ARPHRD_ETHER;
-		break;
-	case IW_MODE_MONITOR:
-		mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
-		break;
-	default:
-		dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
-		return -EINVAL;
-	}
-
-	ieee = zd_mac_to_ieee80211(mac);
-	ZD_ASSERT(!irqs_disabled());
-	spin_lock_irq(&ieee->lock);
-	ieee->iw_mode = mode;
-	spin_unlock_irq(&ieee->lock);
-
-	if (netif_running(mac->netdev)) {
-		int r = set_rx_filter(mac);
-		if (r)
-			return r;
-		return set_sniffer(mac);
-	}
-
-	return 0;
-}
-
-int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
-{
-	unsigned long flags;
-	struct ieee80211_device *ieee;
-
-	ieee = zd_mac_to_ieee80211(mac);
-	spin_lock_irqsave(&ieee->lock, flags);
-	*mode = ieee->iw_mode;
-	spin_unlock_irqrestore(&ieee->lock, flags);
-	return 0;
-}
-
-int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
-{
-	int i;
-	const struct channel_range *channel_range;
-	u8 regdomain;
-
-	memset(range, 0, sizeof(*range));
-
-	/* FIXME: Not so important and depends on the mode. For 802.11g
-	 * usually this value is used. It seems to be that Bit/s number is
-	 * given here.
-	 */
-	range->throughput = 27 * 1000 * 1000;
-
-	range->max_qual.qual = 100;
-	range->max_qual.level = 100;
-
-	/* FIXME: Needs still to be tuned. */
-	range->avg_qual.qual = 71;
-	range->avg_qual.level = 80;
-
-	/* FIXME: depends on standard? */
-	range->min_rts = 256;
-	range->max_rts = 2346;
-
-	range->min_frag = MIN_FRAG_THRESHOLD;
-	range->max_frag = MAX_FRAG_THRESHOLD;
-
-	range->max_encoding_tokens = WEP_KEYS;
-	range->num_encoding_sizes = 2;
-	range->encoding_size[0] = 5;
-	range->encoding_size[1] = WEP_KEY_LEN;
-
-	range->we_version_compiled = WIRELESS_EXT;
-	range->we_version_source = 20;
-
-	range->enc_capa = IW_ENC_CAPA_WPA |  IW_ENC_CAPA_WPA2 |
-			  IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
-
-	ZD_ASSERT(!irqs_disabled());
-	spin_lock_irq(&mac->lock);
-	regdomain = mac->regdomain;
-	spin_unlock_irq(&mac->lock);
-	channel_range = zd_channel_range(regdomain);
-
-	range->num_channels = channel_range->end - channel_range->start;
-	range->old_num_channels = range->num_channels;
-	range->num_frequency = range->num_channels;
-	range->old_num_frequency = range->num_frequency;
-
-	for (i = 0; i < range->num_frequency; i++) {
-		struct iw_freq *freq = &range->freq[i];
-		freq->i = channel_range->start + i;
-		zd_channel_to_freq(freq, freq->i);
+	} else {
+		kfree_tx_skb(skb);
 	}
-
-	return 0;
 }
 
 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
 {
 	/* ZD_PURE_RATE() must be used to remove the modulation type flag of
-	 * the zd-rate values. */
+	 * the zd-rate values.
+	 */
 	static const u8 rate_divisor[] = {
-		[ZD_PURE_RATE(ZD_CCK_RATE_1M)]		=  1,
-		[ZD_PURE_RATE(ZD_CCK_RATE_2M)]		=  2,
-
-		/* bits must be doubled */
-		[ZD_PURE_RATE(ZD_CCK_RATE_5_5M)]	= 11,
-
-		[ZD_PURE_RATE(ZD_CCK_RATE_11M)]		= 11,
-		[ZD_PURE_RATE(ZD_OFDM_RATE_6M)]		=  6,
-		[ZD_PURE_RATE(ZD_OFDM_RATE_9M)]		=  9,
-		[ZD_PURE_RATE(ZD_OFDM_RATE_12M)]	= 12,
-		[ZD_PURE_RATE(ZD_OFDM_RATE_18M)]	= 18,
-		[ZD_PURE_RATE(ZD_OFDM_RATE_24M)]	= 24,
-		[ZD_PURE_RATE(ZD_OFDM_RATE_36M)]	= 36,
-		[ZD_PURE_RATE(ZD_OFDM_RATE_48M)]	= 48,
-		[ZD_PURE_RATE(ZD_OFDM_RATE_54M)]	= 54,
+		[ZD_PURE_RATE(ZD_CCK_RATE_1M)]   =  1,
+		[ZD_PURE_RATE(ZD_CCK_RATE_2M)]	 =  2,
+		/* Bits must be doubled. */
+		[ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11,
+		[ZD_PURE_RATE(ZD_CCK_RATE_11M)]	 = 11,
+		[ZD_PURE_RATE(ZD_OFDM_RATE_6M)]  =  6,
+		[ZD_PURE_RATE(ZD_OFDM_RATE_9M)]  =  9,
+		[ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12,
+		[ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18,
+		[ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24,
+		[ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36,
+		[ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48,
+		[ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54,
 	};
 
 	u32 bits = (u32)tx_length * 8;
@@ -764,34 +448,10 @@ static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
 	return bits/divisor;
 }
 
-static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
-	                      struct ieee80211_hdr_4addr *hdr)
-{
-	struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
-	u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
-	u8 rate;
-	int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
-	int is_multicast = is_multicast_ether_addr(hdr->addr1);
-	int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
-		is_multicast, is_mgt);
-
-	rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
-	cs->modulation = rate_to_zd_rate(rate);
-
-	/* Set short preamble bit when appropriate */
-	if (short_preamble && ZD_MODULATION_TYPE(cs->modulation) == ZD_CCK
-	    && cs->modulation != ZD_CCK_RATE_1M)
-		cs->modulation |= ZD_CCK_PREA_SHORT;
-}
-
 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
-	                   struct ieee80211_hdr_4addr *header)
+	                   struct ieee80211_hdr *header, u32 flags)
 {
-	struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
-	unsigned int tx_length = le16_to_cpu(cs->tx_length);
-	u16 fctl = le16_to_cpu(header->frame_ctl);
-	u16 ftype = WLAN_FC_GET_TYPE(fctl);
-	u16 stype = WLAN_FC_GET_STYPE(fctl);
+	u16 fctl = le16_to_cpu(header->frame_control);
 
 	/*
 	 * CONTROL TODO:
@@ -802,7 +462,7 @@ static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
 	cs->control = 0;
 
 	/* First fragment */
-	if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0)
+	if (flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
 		cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
 
 	/* Multicast */
@@ -810,54 +470,37 @@ static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
 		cs->control |= ZD_CS_MULTICAST;
 
 	/* PS-POLL */
-	if (ftype == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL)
+	if ((fctl & (IEEE80211_FCTL_FTYPE|IEEE80211_FCTL_STYPE)) ==
+	    (IEEE80211_FTYPE_CTL|IEEE80211_STYPE_PSPOLL))
 		cs->control |= ZD_CS_PS_POLL_FRAME;
 
-	/* Unicast data frames over the threshold should have RTS */
-	if (!is_multicast_ether_addr(header->addr1) &&
-	    	ftype != IEEE80211_FTYPE_MGMT &&
-		    tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
+	if (flags & IEEE80211_TXCTL_USE_RTS_CTS)
 		cs->control |= ZD_CS_RTS;
 
-	/* Use CTS-to-self protection if required */
-	if (ZD_MODULATION_TYPE(cs->modulation) == ZD_OFDM &&
-			ieee80211softmac_protection_needed(softmac)) {
-		/* FIXME: avoid sending RTS *and* self-CTS, is that correct? */
-		cs->control &= ~ZD_CS_RTS;
+	if (flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
 		cs->control |= ZD_CS_SELF_CTS;
-	}
 
 	/* FIXME: Management frame? */
 }
 
 static int fill_ctrlset(struct zd_mac *mac,
-	                struct ieee80211_txb *txb,
-			int frag_num)
+			struct sk_buff *skb,
+			struct ieee80211_tx_control *control)
 {
 	int r;
-	struct sk_buff *skb = txb->fragments[frag_num];
-	struct ieee80211_hdr_4addr *hdr =
-		(struct ieee80211_hdr_4addr *) skb->data;
-	unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
-	unsigned int next_frag_len;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	unsigned int frag_len = skb->len + FCS_LEN;
 	unsigned int packet_length;
 	struct zd_ctrlset *cs = (struct zd_ctrlset *)
 		skb_push(skb, sizeof(struct zd_ctrlset));
 
-	if (frag_num+1  < txb->nr_frags) {
-		next_frag_len = txb->fragments[frag_num+1]->len +
-			        IEEE80211_FCS_LEN;
-	} else {
-		next_frag_len = 0;
-	}
 	ZD_ASSERT(frag_len <= 0xffff);
-	ZD_ASSERT(next_frag_len <= 0xffff);
 
-	cs_set_modulation(mac, cs, hdr);
+	cs->modulation = control->tx_rate;
 
 	cs->tx_length = cpu_to_le16(frag_len);
 
-	cs_set_control(mac, cs, hdr);
+	cs_set_control(mac, cs, hdr, control->flags);
 
 	packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
 	ZD_ASSERT(packet_length <= 0xffff);
@@ -886,419 +529,399 @@ static int fill_ctrlset(struct zd_mac *mac,
 	if (r < 0)
 		return r;
 	cs->current_length = cpu_to_le16(r);
-
-	if (next_frag_len == 0) {
-		cs->next_frame_length = 0;
-	} else {
-		r = zd_calc_tx_length_us(NULL, ZD_RATE(cs->modulation),
-			                 next_frag_len);
-		if (r < 0)
-			return r;
-		cs->next_frame_length = cpu_to_le16(r);
-	}
+	cs->next_frame_length = 0;
 
 	return 0;
 }
 
-static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
+/**
+ * zd_op_tx - transmits a network frame to the device
+ *
+ * @dev: mac80211 hardware device
+ * @skb: socket buffer
+ * @control: the control structure
+ *
+ * This function transmit an IEEE 802.11 network frame to the device. The
+ * control block of the skbuff will be initialized. If necessary the incoming
+ * mac80211 queues will be stopped.
+ */
+static int zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
+		     struct ieee80211_tx_control *control)
 {
-	int i, r;
-	struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
+	struct zd_mac *mac = zd_hw_mac(hw);
+	int r;
 
-	for (i = 0; i < txb->nr_frags; i++) {
-		struct sk_buff *skb = txb->fragments[i];
+	r = fill_ctrlset(mac, skb, control);
+	if (r)
+		return r;
 
-		r = fill_ctrlset(mac, txb, i);
-		if (r) {
-			ieee->stats.tx_dropped++;
-			return r;
-		}
-		r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
-		if (r) {
-			ieee->stats.tx_dropped++;
-			return r;
-		}
+	r = init_tx_skb_control_block(skb, hw, control);
+	if (r)
+		return r;
+	r = zd_usb_tx(&mac->chip.usb, skb);
+	if (r) {
+		clear_tx_skb_control_block(skb);
+		return r;
 	}
-
-	/* FIXME: shouldn't this be handled by the upper layers? */
-	mac->netdev->trans_start = jiffies;
-
-	ieee80211_txb_free(txb);
 	return 0;
 }
 
-struct zd_rt_hdr {
-	struct ieee80211_radiotap_header rt_hdr;
-	u8  rt_flags;
-	u8  rt_rate;
-	u16 rt_channel;
-	u16 rt_chbitmask;
-} __attribute__((packed));
-
-static void fill_rt_header(void *buffer, struct zd_mac *mac,
-	                   const struct ieee80211_rx_stats *stats,
-			   const struct rx_status *status)
-{
-	struct zd_rt_hdr *hdr = buffer;
-
-	hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
-	hdr->rt_hdr.it_pad = 0;
-	hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
-	hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
-		                 (1 << IEEE80211_RADIOTAP_CHANNEL) |
-				 (1 << IEEE80211_RADIOTAP_RATE));
-
-	hdr->rt_flags = 0;
-	if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
-		hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
-
-	hdr->rt_rate = stats->rate / 5;
-
-	/* FIXME: 802.11a */
-	hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
-		                             _zd_chip_get_channel(&mac->chip)));
-	hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
-		((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
-		ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
-}
-
-/* Returns 1 if the data packet is for us and 0 otherwise. */
-static int is_data_packet_for_us(struct ieee80211_device *ieee,
-	                         struct ieee80211_hdr_4addr *hdr)
-{
-	struct net_device *netdev = ieee->dev;
-	u16 fc = le16_to_cpu(hdr->frame_ctl);
-
-	ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
-
-	switch (ieee->iw_mode) {
-	case IW_MODE_ADHOC:
-		if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
-		    compare_ether_addr(hdr->addr3, ieee->bssid) != 0)
-			return 0;
-		break;
-	case IW_MODE_AUTO:
-	case IW_MODE_INFRA:
-		if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
-		    IEEE80211_FCTL_FROMDS ||
-		    compare_ether_addr(hdr->addr2, ieee->bssid) != 0)
-			return 0;
-		break;
-	default:
-		ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
-		return 0;
-	}
-
-	return compare_ether_addr(hdr->addr1, netdev->dev_addr) == 0 ||
-	       (is_multicast_ether_addr(hdr->addr1) &&
-		compare_ether_addr(hdr->addr3, netdev->dev_addr) != 0) ||
-	       (netdev->flags & IFF_PROMISC);
-}
-
-/* Filters received packets. The function returns 1 if the packet should be
- * forwarded to ieee80211_rx(). If the packet should be ignored the function
- * returns 0. If an invalid packet is found the function returns -EINVAL.
+/**
+ * filter_ack - filters incoming packets for acknowledgements
+ * @dev: the mac80211 device
+ * @rx_hdr: received header
+ * @stats: the status for the received packet
  *
- * The function calls ieee80211_rx_mgt() directly.
+ * This functions looks for ACK packets and tries to match them with the
+ * frames in the tx queue. If a match is found the frame will be dequeued and
+ * the upper layers is informed about the successful transmission. If
+ * mac80211 queues have been stopped and the number of frames still to be
+ * transmitted is low the queues will be opened again.
  *
- * It has been based on ieee80211_rx_any.
+ * Returns 1 if the frame was an ACK, 0 if it was ignored.
  */
-static int filter_rx(struct ieee80211_device *ieee,
-	             const u8 *buffer, unsigned int length,
-		     struct ieee80211_rx_stats *stats)
+static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr,
+		      struct ieee80211_rx_status *stats)
 {
-	struct ieee80211_hdr_4addr *hdr;
-	u16 fc;
-
-	if (ieee->iw_mode == IW_MODE_MONITOR)
-		return 1;
-
-	hdr = (struct ieee80211_hdr_4addr *)buffer;
-	fc = le16_to_cpu(hdr->frame_ctl);
-	if ((fc & IEEE80211_FCTL_VERS) != 0)
-		return -EINVAL;
+	u16 fc = le16_to_cpu(rx_hdr->frame_control);
+	struct sk_buff *skb;
+	struct sk_buff_head *q;
+	unsigned long flags;
 
-	switch (WLAN_FC_GET_TYPE(fc)) {
-	case IEEE80211_FTYPE_MGMT:
-		if (length < sizeof(struct ieee80211_hdr_3addr))
-			return -EINVAL;
-		ieee80211_rx_mgt(ieee, hdr, stats);
+	if ((fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) !=
+	    (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK))
 		return 0;
-	case IEEE80211_FTYPE_CTL:
-		return 0;
-	case IEEE80211_FTYPE_DATA:
-		/* Ignore invalid short buffers */
-		if (length < sizeof(struct ieee80211_hdr_3addr))
-			return -EINVAL;
-		return is_data_packet_for_us(ieee, hdr);
-	}
 
-	return -EINVAL;
+	q = &zd_hw_mac(hw)->ack_wait_queue;
+	spin_lock_irqsave(&q->lock, flags);
+	for (skb = q->next; skb != (struct sk_buff *)q; skb = skb->next) {
+		struct ieee80211_hdr *tx_hdr;
+
+		tx_hdr = (struct ieee80211_hdr *)skb->data;
+		if (likely(!compare_ether_addr(tx_hdr->addr2, rx_hdr->addr1)))
+		{
+			struct ieee80211_tx_status status = {{0}};
+			status.flags = IEEE80211_TX_STATUS_ACK;
+			status.ack_signal = stats->ssi;
+			__skb_unlink(skb, q);
+			tx_status(hw, skb, &status, 1);
+			goto out;
+		}
+	}
+out:
+	spin_unlock_irqrestore(&q->lock, flags);
+	return 1;
 }
 
-static void update_qual_rssi(struct zd_mac *mac,
-			     const u8 *buffer, unsigned int length,
-			     u8 qual_percent, u8 rssi_percent)
+int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length)
 {
-	unsigned long flags;
-	struct ieee80211_hdr_3addr *hdr;
-	int i;
+	struct zd_mac *mac = zd_hw_mac(hw);
+	struct ieee80211_rx_status stats;
+	const struct rx_status *status;
+	struct sk_buff *skb;
+	int bad_frame = 0;
 
-	hdr = (struct ieee80211_hdr_3addr *)buffer;
-	if (length < offsetof(struct ieee80211_hdr_3addr, addr3))
-		return;
-	if (compare_ether_addr(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid) != 0)
-		return;
+	if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ +
+	             FCS_LEN + sizeof(struct rx_status))
+		return -EINVAL;
 
-	spin_lock_irqsave(&mac->lock, flags);
-	i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE;
-	mac->qual_buffer[i] = qual_percent;
-	mac->rssi_buffer[i] = rssi_percent;
-	mac->stats_count++;
-	spin_unlock_irqrestore(&mac->lock, flags);
-}
+	memset(&stats, 0, sizeof(stats));
 
-static int fill_rx_stats(struct ieee80211_rx_stats *stats,
-	                 const struct rx_status **pstatus,
-		         struct zd_mac *mac,
-			 const u8 *buffer, unsigned int length)
-{
-	const struct rx_status *status;
+	/* Note about pass_failed_fcs and pass_ctrl access below:
+	 * mac locking intentionally omitted here, as this is the only unlocked
+	 * reader and the only writer is configure_filter. Plus, if there were
+	 * any races accessing these variables, it wouldn't really matter.
+	 * If mac80211 ever provides a way for us to access filter flags
+	 * from outside configure_filter, we could improve on this. Also, this
+	 * situation may change once we implement some kind of DMA-into-skb
+	 * RX path. */
 
-	*pstatus = status = (struct rx_status *)
+	/* Caller has to ensure that length >= sizeof(struct rx_status). */
+	status = (struct rx_status *)
 		(buffer + (length - sizeof(struct rx_status)));
 	if (status->frame_status & ZD_RX_ERROR) {
-		struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
-		ieee->stats.rx_errors++;
-		if (status->frame_status & ZD_RX_TIMEOUT_ERROR)
-			ieee->stats.rx_missed_errors++;
-		else if (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR)
-			ieee->stats.rx_fifo_errors++;
-		else if (status->frame_status & ZD_RX_DECRYPTION_ERROR)
-			ieee->ieee_stats.rx_discards_undecryptable++;
-		else if (status->frame_status & ZD_RX_CRC32_ERROR) {
-			ieee->stats.rx_crc_errors++;
-			ieee->ieee_stats.rx_fcs_errors++;
+		if (mac->pass_failed_fcs &&
+				(status->frame_status & ZD_RX_CRC32_ERROR)) {
+			stats.flag |= RX_FLAG_FAILED_FCS_CRC;
+			bad_frame = 1;
+		} else {
+			return -EINVAL;
 		}
-		else if (status->frame_status & ZD_RX_CRC16_ERROR)
-			ieee->stats.rx_crc_errors++;
-		return -EINVAL;
 	}
 
-	memset(stats, 0, sizeof(struct ieee80211_rx_stats));
-	stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
-		               + sizeof(struct rx_status));
-	/* FIXME: 802.11a */
-	stats->freq = IEEE80211_24GHZ_BAND;
-	stats->received_channel = _zd_chip_get_channel(&mac->chip);
-	stats->rssi = zd_rx_strength_percent(status->signal_strength);
-	stats->signal = zd_rx_qual_percent(buffer,
+	stats.channel = _zd_chip_get_channel(&mac->chip);
+	stats.freq = zd_channels[stats.channel - 1].freq;
+	stats.phymode = MODE_IEEE80211G;
+	stats.ssi = status->signal_strength;
+	stats.signal = zd_rx_qual_percent(buffer,
 		                          length - sizeof(struct rx_status),
 		                          status);
-	stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
-	stats->rate = zd_rx_rate(buffer, status);
-	if (stats->rate)
-		stats->mask |= IEEE80211_STATMASK_RATE;
+	stats.rate = zd_rx_rate(buffer, status);
+
+	length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status);
+	buffer += ZD_PLCP_HEADER_SIZE;
+
+	/* Except for bad frames, filter each frame to see if it is an ACK, in
+	 * which case our internal TX tracking is updated. Normally we then
+	 * bail here as there's no need to pass ACKs on up to the stack, but
+	 * there is also the case where the stack has requested us to pass
+	 * control frames on up (pass_ctrl) which we must consider. */
+	if (!bad_frame &&
+			filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats)
+			&& !mac->pass_ctrl)
+		return 0;
 
+	skb = dev_alloc_skb(length);
+	if (skb == NULL)
+		return -ENOMEM;
+	memcpy(skb_put(skb, length), buffer, length);
+
+	ieee80211_rx_irqsafe(hw, skb, &stats);
 	return 0;
 }
 
-static void zd_mac_rx(struct zd_mac *mac, struct sk_buff *skb)
+static int zd_op_add_interface(struct ieee80211_hw *hw,
+				struct ieee80211_if_init_conf *conf)
 {
-	int r;
-	struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
-	struct ieee80211_rx_stats stats;
-	const struct rx_status *status;
+	struct zd_mac *mac = zd_hw_mac(hw);
 
-	if (skb->len < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
-	               IEEE80211_FCS_LEN + sizeof(struct rx_status))
-	{
-		ieee->stats.rx_errors++;
-		ieee->stats.rx_length_errors++;
-		goto free_skb;
-	}
+	/* using IEEE80211_IF_TYPE_INVALID to indicate no mode selected */
+	if (mac->type != IEEE80211_IF_TYPE_INVALID)
+		return -EOPNOTSUPP;
 
-	r = fill_rx_stats(&stats, &status, mac, skb->data, skb->len);
-	if (r) {
-		/* Only packets with rx errors are included here.
-		 * The error stats have already been set in fill_rx_stats.
-		 */
-		goto free_skb;
+	switch (conf->type) {
+	case IEEE80211_IF_TYPE_MNTR:
+	case IEEE80211_IF_TYPE_STA:
+		mac->type = conf->type;
+		break;
+	default:
+		return -EOPNOTSUPP;
 	}
 
-	__skb_pull(skb, ZD_PLCP_HEADER_SIZE);
-	__skb_trim(skb, skb->len -
-		        (IEEE80211_FCS_LEN + sizeof(struct rx_status)));
+	return zd_write_mac_addr(&mac->chip, conf->mac_addr);
+}
 
-	ZD_ASSERT(IS_ALIGNED((unsigned long)skb->data, 4));
+static void zd_op_remove_interface(struct ieee80211_hw *hw,
+				    struct ieee80211_if_init_conf *conf)
+{
+	struct zd_mac *mac = zd_hw_mac(hw);
+	mac->type = IEEE80211_IF_TYPE_INVALID;
+	zd_write_mac_addr(&mac->chip, NULL);
+}
 
-	update_qual_rssi(mac, skb->data, skb->len, stats.signal,
-		         status->signal_strength);
+static int zd_op_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
+{
+	struct zd_mac *mac = zd_hw_mac(hw);
+	return zd_chip_set_channel(&mac->chip, conf->channel);
+}
 
-	r = filter_rx(ieee, skb->data, skb->len, &stats);
-	if (r <= 0) {
-		if (r < 0) {
-			ieee->stats.rx_errors++;
-			dev_dbg_f(zd_mac_dev(mac), "Error in packet.\n");
-		}
-		goto free_skb;
-	}
+static int zd_op_config_interface(struct ieee80211_hw *hw, int if_id,
+				   struct ieee80211_if_conf *conf)
+{
+	struct zd_mac *mac = zd_hw_mac(hw);
 
-	if (ieee->iw_mode == IW_MODE_MONITOR)
-		fill_rt_header(skb_push(skb, sizeof(struct zd_rt_hdr)), mac,
-			       &stats, status);
+	spin_lock_irq(&mac->lock);
+	mac->associated = is_valid_ether_addr(conf->bssid);
+	spin_unlock_irq(&mac->lock);
 
-	r = ieee80211_rx(ieee, skb, &stats);
-	if (r)
-		return;
-free_skb:
-	/* We are always in a soft irq. */
-	dev_kfree_skb(skb);
+	/* TODO: do hardware bssid filtering */
+	return 0;
 }
 
-static void do_rx(unsigned long mac_ptr)
+static void set_multicast_hash_handler(struct work_struct *work)
 {
-	struct zd_mac *mac = (struct zd_mac *)mac_ptr;
-	struct sk_buff *skb;
+	struct zd_mac *mac =
+		container_of(work, struct zd_mac, set_multicast_hash_work);
+	struct zd_mc_hash hash;
 
-	while ((skb = skb_dequeue(&mac->rx_queue)) != NULL)
-		zd_mac_rx(mac, skb);
-}
+	spin_lock_irq(&mac->lock);
+	hash = mac->multicast_hash;
+	spin_unlock_irq(&mac->lock);
 
-int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length)
-{
-	struct sk_buff *skb;
-	unsigned int reserved =
-		ALIGN(max_t(unsigned int,
-		            sizeof(struct zd_rt_hdr), ZD_PLCP_HEADER_SIZE), 4) -
-		ZD_PLCP_HEADER_SIZE;
-
-	skb = dev_alloc_skb(reserved + length);
-	if (!skb) {
-		struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
-		dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n");
-		ieee->stats.rx_dropped++;
-		return -ENOMEM;
-	}
-	skb_reserve(skb, reserved);
-	memcpy(__skb_put(skb, length), buffer, length);
-	skb_queue_tail(&mac->rx_queue, skb);
-	tasklet_schedule(&mac->rx_tasklet);
-	return 0;
+	zd_chip_set_multicast_hash(&mac->chip, &hash);
 }
 
-static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
-		     int pri)
+static void set_rx_filter_handler(struct work_struct *work)
 {
-	return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
+	struct zd_mac *mac =
+		container_of(work, struct zd_mac, set_rx_filter_work);
+	int r;
+
+	dev_dbg_f(zd_mac_dev(mac), "\n");
+	r = set_rx_filter(mac);
+	if (r)
+		dev_err(zd_mac_dev(mac), "set_rx_filter_handler error %d\n", r);
 }
 
-static void set_security(struct net_device *netdev,
-			 struct ieee80211_security *sec)
+#define SUPPORTED_FIF_FLAGS \
+	(FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \
+	FIF_OTHER_BSS)
+static void zd_op_configure_filter(struct ieee80211_hw *hw,
+			unsigned int changed_flags,
+			unsigned int *new_flags,
+			int mc_count, struct dev_mc_list *mclist)
 {
-	struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
-	struct ieee80211_security *secinfo = &ieee->sec;
-	int keyidx;
-
-	dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
-
-	for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
-		if (sec->flags & (1<<keyidx)) {
-			secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
-			secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
-			memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
-			       SCM_KEY_LEN);
-		}
+	struct zd_mc_hash hash;
+	struct zd_mac *mac = zd_hw_mac(hw);
+	unsigned long flags;
+	int i;
 
-	if (sec->flags & SEC_ACTIVE_KEY) {
-		secinfo->active_key = sec->active_key;
-		dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
-			"   .active_key = %d\n", sec->active_key);
-	}
-	if (sec->flags & SEC_UNICAST_GROUP) {
-		secinfo->unicast_uses_group = sec->unicast_uses_group;
-		dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
-			"   .unicast_uses_group = %d\n",
-			sec->unicast_uses_group);
-	}
-	if (sec->flags & SEC_LEVEL) {
-		secinfo->level = sec->level;
-		dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
-			"   .level = %d\n", sec->level);
-	}
-	if (sec->flags & SEC_ENABLED) {
-		secinfo->enabled = sec->enabled;
-		dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
-			"   .enabled = %d\n", sec->enabled);
-	}
-	if (sec->flags & SEC_ENCRYPT) {
-		secinfo->encrypt = sec->encrypt;
-		dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
-			"   .encrypt = %d\n", sec->encrypt);
-	}
-	if (sec->flags & SEC_AUTH_MODE) {
-		secinfo->auth_mode = sec->auth_mode;
-		dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
-			"   .auth_mode = %d\n", sec->auth_mode);
+	/* Only deal with supported flags */
+	changed_flags &= SUPPORTED_FIF_FLAGS;
+	*new_flags &= SUPPORTED_FIF_FLAGS;
+
+	/* changed_flags is always populated but this driver
+	 * doesn't support all FIF flags so its possible we don't
+	 * need to do anything */
+	if (!changed_flags)
+		return;
+
+	if (*new_flags & (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)) {
+		zd_mc_add_all(&hash);
+	} else {
+		DECLARE_MAC_BUF(macbuf);
+
+		zd_mc_clear(&hash);
+		for (i = 0; i < mc_count; i++) {
+			if (!mclist)
+				break;
+			dev_dbg_f(zd_mac_dev(mac), "mc addr %s\n",
+				  print_mac(macbuf, mclist->dmi_addr));
+			zd_mc_add_addr(&hash, mclist->dmi_addr);
+			mclist = mclist->next;
+		}
 	}
+
+	spin_lock_irqsave(&mac->lock, flags);
+	mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL);
+	mac->pass_ctrl = !!(*new_flags & FIF_CONTROL);
+	mac->multicast_hash = hash;
+	spin_unlock_irqrestore(&mac->lock, flags);
+	queue_work(zd_workqueue, &mac->set_multicast_hash_work);
+
+	if (changed_flags & FIF_CONTROL)
+		queue_work(zd_workqueue, &mac->set_rx_filter_work);
+
+	/* no handling required for FIF_OTHER_BSS as we don't currently
+	 * do BSSID filtering */
+	/* FIXME: in future it would be nice to enable the probe response
+	 * filter (so that the driver doesn't see them) until
+	 * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd
+	 * have to schedule work to enable prbresp reception, which might
+	 * happen too late. For now we'll just listen and forward them all the
+	 * time. */
 }
 
-static void ieee_init(struct ieee80211_device *ieee)
+static void set_rts_cts_work(struct work_struct *work)
 {
-	ieee->mode = IEEE_B | IEEE_G;
-	ieee->freq_band = IEEE80211_24GHZ_BAND;
-	ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
-	ieee->tx_headroom = sizeof(struct zd_ctrlset);
-	ieee->set_security = set_security;
-	ieee->hard_start_xmit = netdev_tx;
-
-	/* Software encryption/decryption for now */
-	ieee->host_build_iv = 0;
-	ieee->host_encrypt = 1;
-	ieee->host_decrypt = 1;
-
-	/* FIXME: default to managed mode, until ieee80211 and zd1211rw can
-	 * correctly support AUTO */
-	ieee->iw_mode = IW_MODE_INFRA;
+	struct zd_mac *mac =
+		container_of(work, struct zd_mac, set_rts_cts_work);
+	unsigned long flags;
+	unsigned int short_preamble;
+
+	mutex_lock(&mac->chip.mutex);
+
+	spin_lock_irqsave(&mac->lock, flags);
+	mac->updating_rts_rate = 0;
+	short_preamble = mac->short_preamble;
+	spin_unlock_irqrestore(&mac->lock, flags);
+
+	zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble);
+	mutex_unlock(&mac->chip.mutex);
 }
 
-static void softmac_init(struct ieee80211softmac_device *sm)
+static void zd_op_erp_ie_changed(struct ieee80211_hw *hw, u8 changes,
+				 int cts_protection, int preamble)
 {
-	sm->set_channel = set_channel;
-	sm->bssinfo_change = bssinfo_change;
+	struct zd_mac *mac = zd_hw_mac(hw);
+	unsigned long flags;
+
+	dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
+
+	if (changes & IEEE80211_ERP_CHANGE_PREAMBLE) {
+		spin_lock_irqsave(&mac->lock, flags);
+		mac->short_preamble = !preamble;
+		if (!mac->updating_rts_rate) {
+			mac->updating_rts_rate = 1;
+			/* FIXME: should disable TX here, until work has
+			 * completed and RTS_CTS reg is updated */
+			queue_work(zd_workqueue, &mac->set_rts_cts_work);
+		}
+		spin_unlock_irqrestore(&mac->lock, flags);
+	}
 }
 
-struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
+static const struct ieee80211_ops zd_ops = {
+	.tx			= zd_op_tx,
+	.start			= zd_op_start,
+	.stop			= zd_op_stop,
+	.add_interface		= zd_op_add_interface,
+	.remove_interface	= zd_op_remove_interface,
+	.config			= zd_op_config,
+	.config_interface	= zd_op_config_interface,
+	.configure_filter	= zd_op_configure_filter,
+	.erp_ie_changed		= zd_op_erp_ie_changed,
+};
+
+struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf)
 {
-	struct zd_mac *mac = zd_netdev_mac(ndev);
-	struct iw_statistics *iw_stats = &mac->iw_stats;
-	unsigned int i, count, qual_total, rssi_total;
+	struct zd_mac *mac;
+	struct ieee80211_hw *hw;
+	int i;
 
-	memset(iw_stats, 0, sizeof(struct iw_statistics));
-	/* We are not setting the status, because ieee->state is not updated
-	 * at all and this driver doesn't track authentication state.
-	 */
-	spin_lock_irq(&mac->lock);
-	count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ?
-		mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE;
-	qual_total = rssi_total = 0;
-	for (i = 0; i < count; i++) {
-		qual_total += mac->qual_buffer[i];
-		rssi_total += mac->rssi_buffer[i];
+	hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops);
+	if (!hw) {
+		dev_dbg_f(&intf->dev, "out of memory\n");
+		return NULL;
 	}
-	spin_unlock_irq(&mac->lock);
-	iw_stats->qual.updated = IW_QUAL_NOISE_INVALID;
-	if (count > 0) {
-		iw_stats->qual.qual = qual_total / count;
-		iw_stats->qual.level = rssi_total / count;
-		iw_stats->qual.updated |=
-			IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED;
-	} else {
-		iw_stats->qual.updated |=
-			IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID;
+
+	mac = zd_hw_mac(hw);
+
+	memset(mac, 0, sizeof(*mac));
+	spin_lock_init(&mac->lock);
+	mac->hw = hw;
+
+	mac->type = IEEE80211_IF_TYPE_INVALID;
+
+	memcpy(mac->channels, zd_channels, sizeof(zd_channels));
+	memcpy(mac->rates, zd_rates, sizeof(zd_rates));
+	mac->modes[0].mode = MODE_IEEE80211G;
+	mac->modes[0].num_rates = ARRAY_SIZE(zd_rates);
+	mac->modes[0].rates = mac->rates;
+	mac->modes[0].num_channels = ARRAY_SIZE(zd_channels);
+	mac->modes[0].channels = mac->channels;
+	mac->modes[1].mode = MODE_IEEE80211B;
+	mac->modes[1].num_rates = 4;
+	mac->modes[1].rates = mac->rates;
+	mac->modes[1].num_channels = ARRAY_SIZE(zd_channels);
+	mac->modes[1].channels = mac->channels;
+
+	hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
+		     IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED;
+	hw->max_rssi = 100;
+	hw->max_signal = 100;
+
+	hw->queues = 1;
+	hw->extra_tx_headroom = sizeof(struct zd_ctrlset);
+
+	skb_queue_head_init(&mac->ack_wait_queue);
+
+	for (i = 0; i < 2; i++) {
+		if (ieee80211_register_hwmode(hw, &mac->modes[i])) {
+			dev_dbg_f(&intf->dev, "cannot register hwmode\n");
+			ieee80211_free_hw(hw);
+			return NULL;
+		}
 	}
-	/* TODO: update counter */
-	return iw_stats;
+
+	zd_chip_init(&mac->chip, hw, intf);
+	housekeeping_init(mac);
+	INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler);
+	INIT_WORK(&mac->set_rts_cts_work, set_rts_cts_work);
+	INIT_WORK(&mac->set_rx_filter_work, set_rx_filter_handler);
+
+	SET_IEEE80211_DEV(hw, &intf->dev);
+	return hw;
 }
 
 #define LINK_LED_WORK_DELAY HZ
@@ -1308,18 +931,17 @@ static void link_led_handler(struct work_struct *work)
 	struct zd_mac *mac =
 		container_of(work, struct zd_mac, housekeeping.link_led_work.work);
 	struct zd_chip *chip = &mac->chip;
-	struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev);
 	int is_associated;
 	int r;
 
 	spin_lock_irq(&mac->lock);
-	is_associated = sm->associnfo.associated != 0;
+	is_associated = mac->associated;
 	spin_unlock_irq(&mac->lock);
 
 	r = zd_chip_control_leds(chip,
 		                 is_associated ? LED_ASSOCIATED : LED_SCANNING);
 	if (r)
-		dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
+		dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
 
 	queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
 		           LINK_LED_WORK_DELAY);