zd1211rw: move under zydas vendor directory

Part of reorganising wireless drivers directory and Kconfig.

Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 0 insertions, 1550 deletions

diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c
deleted file mode 100644
index e539d9b1b562..000000000000
--- a/drivers/net/wireless/zd1211rw/zd_mac.c
+++ /dev/null
@@ -1,1550 +0,0 @@
-/* ZD1211 USB-WLAN driver for Linux
- *
- * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
- * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
- * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net>
- * Copyright (C) 2007-2008 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
- * (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; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include <linux/jiffies.h>
-#include <net/ieee80211_radiotap.h>
-
-#include "zd_def.h"
-#include "zd_chip.h"
-#include "zd_mac.h"
-#include "zd_rf.h"
-
-struct zd_reg_alpha2_map {
-	u32 reg;
-	char alpha2[2];
-};
-
-static struct zd_reg_alpha2_map reg_alpha2_map[] = {
-	{ ZD_REGDOMAIN_FCC, "US" },
-	{ ZD_REGDOMAIN_IC, "CA" },
-	{ ZD_REGDOMAIN_ETSI, "DE" }, /* Generic ETSI, use most restrictive */
-	{ ZD_REGDOMAIN_JAPAN, "JP" },
-	{ ZD_REGDOMAIN_JAPAN_2, "JP" },
-	{ ZD_REGDOMAIN_JAPAN_3, "JP" },
-	{ ZD_REGDOMAIN_SPAIN, "ES" },
-	{ ZD_REGDOMAIN_FRANCE, "FR" },
-};
-
-/* This table contains the hardware specific values for the modulation rates. */
-static const struct ieee80211_rate zd_rates[] = {
-	{ .bitrate = 10,
-	  .hw_value = ZD_CCK_RATE_1M, },
-	{ .bitrate = 20,
-	  .hw_value = ZD_CCK_RATE_2M,
-	  .hw_value_short = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT,
-	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
-	{ .bitrate = 55,
-	  .hw_value = ZD_CCK_RATE_5_5M,
-	  .hw_value_short = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT,
-	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
-	{ .bitrate = 110,
-	  .hw_value = ZD_CCK_RATE_11M,
-	  .hw_value_short = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT,
-	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
-	{ .bitrate = 60,
-	  .hw_value = ZD_OFDM_RATE_6M,
-	  .flags = 0 },
-	{ .bitrate = 90,
-	  .hw_value = ZD_OFDM_RATE_9M,
-	  .flags = 0 },
-	{ .bitrate = 120,
-	  .hw_value = ZD_OFDM_RATE_12M,
-	  .flags = 0 },
-	{ .bitrate = 180,
-	  .hw_value = ZD_OFDM_RATE_18M,
-	  .flags = 0 },
-	{ .bitrate = 240,
-	  .hw_value = ZD_OFDM_RATE_24M,
-	  .flags = 0 },
-	{ .bitrate = 360,
-	  .hw_value = ZD_OFDM_RATE_36M,
-	  .flags = 0 },
-	{ .bitrate = 480,
-	  .hw_value = ZD_OFDM_RATE_48M,
-	  .flags = 0 },
-	{ .bitrate = 540,
-	  .hw_value = ZD_OFDM_RATE_54M,
-	  .flags = 0 },
-};
-
-/*
- * Zydas retry rates table. Each line is listed in the same order as
- * in zd_rates[] and contains all the rate used when a packet is sent
- * starting with a given rates. Let's consider an example :
- *
- * "11 Mbits : 4, 3, 2, 1, 0" means :
- * - packet is sent using 4 different rates
- * - 1st rate is index 3 (ie 11 Mbits)
- * - 2nd rate is index 2 (ie 5.5 Mbits)
- * - 3rd rate is index 1 (ie 2 Mbits)
- * - 4th rate is index 0 (ie 1 Mbits)
- */
-
-static const struct tx_retry_rate zd_retry_rates[] = {
-	{ /*  1 Mbits */	1, { 0 }},
-	{ /*  2 Mbits */	2, { 1,  0 }},
-	{ /*  5.5 Mbits */	3, { 2,  1, 0 }},
-	{ /* 11 Mbits */	4, { 3,  2, 1, 0 }},
-	{ /*  6 Mbits */	5, { 4,  3, 2, 1, 0 }},
-	{ /*  9 Mbits */	6, { 5,  4, 3, 2, 1, 0}},
-	{ /* 12 Mbits */	5, { 6,  3, 2, 1, 0 }},
-	{ /* 18 Mbits */	6, { 7,  6, 3, 2, 1, 0 }},
-	{ /* 24 Mbits */	6, { 8,  6, 3, 2, 1, 0 }},
-	{ /* 36 Mbits */	7, { 9,  8, 6, 3, 2, 1, 0 }},
-	{ /* 48 Mbits */	8, {10,  9, 8, 6, 3, 2, 1, 0 }},
-	{ /* 54 Mbits */	9, {11, 10, 9, 8, 6, 3, 2, 1, 0 }}
-};
-
-static const struct ieee80211_channel zd_channels[] = {
-	{ .center_freq = 2412, .hw_value = 1 },
-	{ .center_freq = 2417, .hw_value = 2 },
-	{ .center_freq = 2422, .hw_value = 3 },
-	{ .center_freq = 2427, .hw_value = 4 },
-	{ .center_freq = 2432, .hw_value = 5 },
-	{ .center_freq = 2437, .hw_value = 6 },
-	{ .center_freq = 2442, .hw_value = 7 },
-	{ .center_freq = 2447, .hw_value = 8 },
-	{ .center_freq = 2452, .hw_value = 9 },
-	{ .center_freq = 2457, .hw_value = 10 },
-	{ .center_freq = 2462, .hw_value = 11 },
-	{ .center_freq = 2467, .hw_value = 12 },
-	{ .center_freq = 2472, .hw_value = 13 },
-	{ .center_freq = 2484, .hw_value = 14 },
-};
-
-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 beacon_init(struct zd_mac *mac);
-static void beacon_enable(struct zd_mac *mac);
-static void beacon_disable(struct zd_mac *mac);
-static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble);
-static int zd_mac_config_beacon(struct ieee80211_hw *hw,
-				struct sk_buff *beacon, bool in_intr);
-
-static int zd_reg2alpha2(u8 regdomain, char *alpha2)
-{
-	unsigned int i;
-	struct zd_reg_alpha2_map *reg_map;
-	for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) {
-		reg_map = &reg_alpha2_map[i];
-		if (regdomain == reg_map->reg) {
-			alpha2[0] = reg_map->alpha2[0];
-			alpha2[1] = reg_map->alpha2[1];
-			return 0;
-		}
-	}
-	return 1;
-}
-
-static int zd_check_signal(struct ieee80211_hw *hw, int signal)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-
-	dev_dbg_f_cond(zd_mac_dev(mac), signal < 0 || signal > 100,
-			"%s: signal value from device not in range 0..100, "
-			"but %d.\n", __func__, signal);
-
-	if (signal < 0)
-		signal = 0;
-	else if (signal > 100)
-		signal = 100;
-
-	return signal;
-}
-
-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;
-
-	SET_IEEE80211_PERM_ADDR(hw, addr);
-
-	return 0;
-}
-
-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;
-	char alpha2[2];
-	u8 default_regdomain;
-
-	r = zd_chip_enable_int(chip);
-	if (r)
-		goto out;
-	r = zd_chip_init_hw(chip);
-	if (r)
-		goto disable_int;
-
-	ZD_ASSERT(!irqs_disabled());
-
-	r = zd_read_regdomain(chip, &default_regdomain);
-	if (r)
-		goto disable_int;
-	spin_lock_irq(&mac->lock);
-	mac->regdomain = mac->default_regdomain = default_regdomain;
-	spin_unlock_irq(&mac->lock);
-
-	/* We must inform the device that we are doing encryption/decryption in
-	 * software at the moment. */
-	r = zd_set_encryption_type(chip, ENC_SNIFFER);
-	if (r)
-		goto disable_int;
-
-	r = zd_reg2alpha2(mac->regdomain, alpha2);
-	if (r)
-		goto disable_int;
-
-	r = regulatory_hint(hw->wiphy, alpha2);
-disable_int:
-	zd_chip_disable_int(chip);
-out:
-	return r;
-}
-
-void zd_mac_clear(struct zd_mac *mac)
-{
-	flush_workqueue(zd_workqueue);
-	zd_chip_clear(&mac->chip);
-	ZD_ASSERT(!spin_is_locked(&mac->lock));
-	ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
-}
-
-static int set_rx_filter(struct zd_mac *mac)
-{
-	unsigned long flags;
-	u32 filter = STA_RX_FILTER;
-
-	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_mac_and_bssid(struct zd_mac *mac)
-{
-	int r;
-
-	if (!mac->vif)
-		return -1;
-
-	r = zd_write_mac_addr(&mac->chip, mac->vif->addr);
-	if (r)
-		return r;
-
-	/* Vendor driver after setting MAC either sets BSSID for AP or
-	 * filter for other modes.
-	 */
-	if (mac->type != NL80211_IFTYPE_AP)
-		return set_rx_filter(mac);
-	else
-		return zd_write_bssid(&mac->chip, mac->vif->addr);
-}
-
-static int set_mc_hash(struct zd_mac *mac)
-{
-	struct zd_mc_hash hash;
-	zd_mc_clear(&hash);
-	return zd_chip_set_multicast_hash(&mac->chip, &hash);
-}
-
-int zd_op_start(struct ieee80211_hw *hw)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-	struct zd_chip *chip = &mac->chip;
-	struct zd_usb *usb = &chip->usb;
-	int r;
-
-	if (!usb->initialized) {
-		r = zd_usb_init_hw(usb);
-		if (r)
-			goto out;
-	}
-
-	r = zd_chip_enable_int(chip);
-	if (r < 0)
-		goto out;
-
-	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_mc_hash(mac);
-	if (r)
-		goto disable_int;
-
-	/* Wait after setting the multicast hash table and powering on
-	 * the radio otherwise interface bring up will fail. This matches
-	 * what the vendor driver did.
-	 */
-	msleep(10);
-
-	r = zd_chip_switch_radio_on(chip);
-	if (r < 0) {
-		dev_err(zd_chip_dev(chip),
-			"%s: failed to set radio on\n", __func__);
-		goto disable_int;
-	}
-	r = zd_chip_enable_rxtx(chip);
-	if (r < 0)
-		goto disable_radio;
-	r = zd_chip_enable_hwint(chip);
-	if (r < 0)
-		goto disable_rxtx;
-
-	housekeeping_enable(mac);
-	beacon_enable(mac);
-	set_bit(ZD_DEVICE_RUNNING, &mac->flags);
-	return 0;
-disable_rxtx:
-	zd_chip_disable_rxtx(chip);
-disable_radio:
-	zd_chip_switch_radio_off(chip);
-disable_int:
-	zd_chip_disable_int(chip);
-out:
-	return r;
-}
-
-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;
-
-	clear_bit(ZD_DEVICE_RUNNING, &mac->flags);
-
-	/* 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 mac80211 after we have stopped it.
-	 */
-
-	zd_chip_disable_rxtx(chip);
-	beacon_disable(mac);
-	housekeeping_disable(mac);
-	flush_workqueue(zd_workqueue);
-
-	zd_chip_disable_hwint(chip);
-	zd_chip_switch_radio_off(chip);
-	zd_chip_disable_int(chip);
-
-
-	while ((skb = skb_dequeue(ack_wait_queue)))
-		dev_kfree_skb_any(skb);
-}
-
-int zd_restore_settings(struct zd_mac *mac)
-{
-	struct sk_buff *beacon;
-	struct zd_mc_hash multicast_hash;
-	unsigned int short_preamble;
-	int r, beacon_interval, beacon_period;
-	u8 channel;
-
-	dev_dbg_f(zd_mac_dev(mac), "\n");
-
-	spin_lock_irq(&mac->lock);
-	multicast_hash = mac->multicast_hash;
-	short_preamble = mac->short_preamble;
-	beacon_interval = mac->beacon.interval;
-	beacon_period = mac->beacon.period;
-	channel = mac->channel;
-	spin_unlock_irq(&mac->lock);
-
-	r = set_mac_and_bssid(mac);
-	if (r < 0) {
-		dev_dbg_f(zd_mac_dev(mac), "set_mac_and_bssid failed, %d\n", r);
-		return r;
-	}
-
-	r = zd_chip_set_channel(&mac->chip, channel);
-	if (r < 0) {
-		dev_dbg_f(zd_mac_dev(mac), "zd_chip_set_channel failed, %d\n",
-			  r);
-		return r;
-	}
-
-	set_rts_cts(mac, short_preamble);
-
-	r = zd_chip_set_multicast_hash(&mac->chip, &multicast_hash);
-	if (r < 0) {
-		dev_dbg_f(zd_mac_dev(mac),
-			  "zd_chip_set_multicast_hash failed, %d\n", r);
-		return r;
-	}
-
-	if (mac->type == NL80211_IFTYPE_MESH_POINT ||
-	    mac->type == NL80211_IFTYPE_ADHOC ||
-	    mac->type == NL80211_IFTYPE_AP) {
-		if (mac->vif != NULL) {
-			beacon = ieee80211_beacon_get(mac->hw, mac->vif);
-			if (beacon)
-				zd_mac_config_beacon(mac->hw, beacon, false);
-		}
-
-		zd_set_beacon_interval(&mac->chip, beacon_interval,
-					beacon_period, mac->type);
-
-		spin_lock_irq(&mac->lock);
-		mac->beacon.last_update = jiffies;
-		spin_unlock_irq(&mac->lock);
-	}
-
-	return 0;
-}
-
-/**
- * zd_mac_tx_status - reports tx status of a packet if required
- * @hw - a &struct ieee80211_hw pointer
- * @skb - a sk-buffer
- * @flags: extra flags to set in the TX status info
- * @ackssi: ACK signal strength
- * @success - True for successful 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 zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
-		      int ackssi, struct tx_status *tx_status)
-{
-	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-	int i;
-	int success = 1, retry = 1;
-	int first_idx;
-	const struct tx_retry_rate *retries;
-
-	ieee80211_tx_info_clear_status(info);
-
-	if (tx_status) {
-		success = !tx_status->failure;
-		retry = tx_status->retry + success;
-	}
-
-	if (success) {
-		/* success */
-		info->flags |= IEEE80211_TX_STAT_ACK;
-	} else {
-		/* failure */
-		info->flags &= ~IEEE80211_TX_STAT_ACK;
-	}
-
-	first_idx = info->status.rates[0].idx;
-	ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates));
-	retries = &zd_retry_rates[first_idx];
-	ZD_ASSERT(1 <= retry && retry <= retries->count);
-
-	info->status.rates[0].idx = retries->rate[0];
-	info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1);
-
-	for (i=1; i<IEEE80211_TX_MAX_RATES-1 && i<retry; i++) {
-		info->status.rates[i].idx = retries->rate[i];
-		info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2);
-	}
-	for (; i<IEEE80211_TX_MAX_RATES && i<retry; i++) {
-		info->status.rates[i].idx = retries->rate[retry - 1];
-		info->status.rates[i].count = 1; // (success ? 1:2);
-	}
-	if (i<IEEE80211_TX_MAX_RATES)
-		info->status.rates[i].idx = -1; /* terminate */
-
-	info->status.ack_signal = zd_check_signal(hw, ackssi);
-	ieee80211_tx_status_irqsafe(hw, skb);
-}
-
-/**
- * zd_mac_tx_failed - callback for failed frames
- * @dev: the mac80211 wireless device
- *
- * This function is called if a frame couldn't be successfully
- * 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 urb *urb)
-{
-	struct ieee80211_hw * hw = zd_usb_to_hw(urb->context);
-	struct zd_mac *mac = zd_hw_mac(hw);
-	struct sk_buff_head *q = &mac->ack_wait_queue;
-	struct sk_buff *skb;
-	struct tx_status *tx_status = (struct tx_status *)urb->transfer_buffer;
-	unsigned long flags;
-	int success = !tx_status->failure;
-	int retry = tx_status->retry + success;
-	int found = 0;
-	int i, position = 0;
-
-	q = &mac->ack_wait_queue;
-	spin_lock_irqsave(&q->lock, flags);
-
-	skb_queue_walk(q, skb) {
-		struct ieee80211_hdr *tx_hdr;
-		struct ieee80211_tx_info *info;
-		int first_idx, final_idx;
-		const struct tx_retry_rate *retries;
-		u8 final_rate;
-
-		position ++;
-
-		/* if the hardware reports a failure and we had a 802.11 ACK
-		 * pending, then we skip the first skb when searching for a
-		 * matching frame */
-		if (tx_status->failure && mac->ack_pending &&
-		    skb_queue_is_first(q, skb)) {
-			continue;
-		}
-
-		tx_hdr = (struct ieee80211_hdr *)skb->data;
-
-		/* we skip all frames not matching the reported destination */
-		if (unlikely(!ether_addr_equal(tx_hdr->addr1, tx_status->mac)))
-			continue;
-
-		/* we skip all frames not matching the reported final rate */
-
-		info = IEEE80211_SKB_CB(skb);
-		first_idx = info->status.rates[0].idx;
-		ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates));
-		retries = &zd_retry_rates[first_idx];
-		if (retry <= 0 || retry > retries->count)
-			continue;
-
-		final_idx = retries->rate[retry - 1];
-		final_rate = zd_rates[final_idx].hw_value;
-
-		if (final_rate != tx_status->rate) {
-			continue;
-		}
-
-		found = 1;
-		break;
-	}
-
-	if (found) {
-		for (i=1; i<=position; i++) {
-			skb = __skb_dequeue(q);
-			zd_mac_tx_status(hw, skb,
-					 mac->ack_pending ? mac->ack_signal : 0,
-					 i == position ? tx_status : NULL);
-			mac->ack_pending = 0;
-		}
-	}
-
-	spin_unlock_irqrestore(&q->lock, flags);
-}
-
-/**
- * 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 ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_hw *hw = info->rate_driver_data[0];
-	struct zd_mac *mac = zd_hw_mac(hw);
-
-	ieee80211_tx_info_clear_status(info);
-
-	skb_pull(skb, sizeof(struct zd_ctrlset));
-	if (unlikely(error ||
-	    (info->flags & IEEE80211_TX_CTL_NO_ACK))) {
-		/*
-		 * FIXME : do we need to fill in anything ?
-		 */
-		ieee80211_tx_status_irqsafe(hw, skb);
-	} else {
-		struct sk_buff_head *q = &mac->ack_wait_queue;
-
-		skb_queue_tail(q, skb);
-		while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) {
-			zd_mac_tx_status(hw, skb_dequeue(q),
-					 mac->ack_pending ? mac->ack_signal : 0,
-					 NULL);
-			mac->ack_pending = 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.
-	 */
-	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,
-	};
-
-	u32 bits = (u32)tx_length * 8;
-	u32 divisor;
-
-	divisor = rate_divisor[ZD_PURE_RATE(zd_rate)];
-	if (divisor == 0)
-		return -EINVAL;
-
-	switch (zd_rate) {
-	case ZD_CCK_RATE_5_5M:
-		bits = (2*bits) + 10; /* round up to the next integer */
-		break;
-	case ZD_CCK_RATE_11M:
-		if (service) {
-			u32 t = bits % 11;
-			*service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
-			if (0 < t && t <= 3) {
-				*service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
-			}
-		}
-		bits += 10; /* round up to the next integer */
-		break;
-	}
-
-	return bits/divisor;
-}
-
-static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
-	                   struct ieee80211_hdr *header,
-	                   struct ieee80211_tx_info *info)
-{
-	/*
-	 * CONTROL TODO:
-	 * - if backoff needed, enable bit 0
-	 * - if burst (backoff not needed) disable bit 0
-	 */
-
-	cs->control = 0;
-
-	/* First fragment */
-	if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
-		cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
-
-	/* No ACK expected (multicast, etc.) */
-	if (info->flags & IEEE80211_TX_CTL_NO_ACK)
-		cs->control |= ZD_CS_NO_ACK;
-
-	/* PS-POLL */
-	if (ieee80211_is_pspoll(header->frame_control))
-		cs->control |= ZD_CS_PS_POLL_FRAME;
-
-	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
-		cs->control |= ZD_CS_RTS;
-
-	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
-		cs->control |= ZD_CS_SELF_CTS;
-
-	/* FIXME: Management frame? */
-}
-
-static bool zd_mac_match_cur_beacon(struct zd_mac *mac, struct sk_buff *beacon)
-{
-	if (!mac->beacon.cur_beacon)
-		return false;
-
-	if (mac->beacon.cur_beacon->len != beacon->len)
-		return false;
-
-	return !memcmp(beacon->data, mac->beacon.cur_beacon->data, beacon->len);
-}
-
-static void zd_mac_free_cur_beacon_locked(struct zd_mac *mac)
-{
-	ZD_ASSERT(mutex_is_locked(&mac->chip.mutex));
-
-	kfree_skb(mac->beacon.cur_beacon);
-	mac->beacon.cur_beacon = NULL;
-}
-
-static void zd_mac_free_cur_beacon(struct zd_mac *mac)
-{
-	mutex_lock(&mac->chip.mutex);
-	zd_mac_free_cur_beacon_locked(mac);
-	mutex_unlock(&mac->chip.mutex);
-}
-
-static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon,
-				bool in_intr)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-	int r, ret, num_cmds, req_pos = 0;
-	u32 tmp, j = 0;
-	/* 4 more bytes for tail CRC */
-	u32 full_len = beacon->len + 4;
-	unsigned long end_jiffies, message_jiffies;
-	struct zd_ioreq32 *ioreqs;
-
-	mutex_lock(&mac->chip.mutex);
-
-	/* Check if hw already has this beacon. */
-	if (zd_mac_match_cur_beacon(mac, beacon)) {
-		r = 0;
-		goto out_nofree;
-	}
-
-	/* Alloc memory for full beacon write at once. */
-	num_cmds = 1 + zd_chip_is_zd1211b(&mac->chip) + full_len;
-	ioreqs = kmalloc(num_cmds * sizeof(struct zd_ioreq32), GFP_KERNEL);
-	if (!ioreqs) {
-		r = -ENOMEM;
-		goto out_nofree;
-	}
-
-	r = zd_iowrite32_locked(&mac->chip, 0, CR_BCN_FIFO_SEMAPHORE);
-	if (r < 0)
-		goto out;
-	r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE);
-	if (r < 0)
-		goto release_sema;
-	if (in_intr && tmp & 0x2) {
-		r = -EBUSY;
-		goto release_sema;
-	}
-
-	end_jiffies = jiffies + HZ / 2; /*~500ms*/
-	message_jiffies = jiffies + HZ / 10; /*~100ms*/
-	while (tmp & 0x2) {
-		r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE);
-		if (r < 0)
-			goto release_sema;
-		if (time_is_before_eq_jiffies(message_jiffies)) {
-			message_jiffies = jiffies + HZ / 10;
-			dev_err(zd_mac_dev(mac),
-					"CR_BCN_FIFO_SEMAPHORE not ready\n");
-			if (time_is_before_eq_jiffies(end_jiffies))  {
-				dev_err(zd_mac_dev(mac),
-						"Giving up beacon config.\n");
-				r = -ETIMEDOUT;
-				goto reset_device;
-			}
-		}
-		msleep(20);
-	}
-
-	ioreqs[req_pos].addr = CR_BCN_FIFO;
-	ioreqs[req_pos].value = full_len - 1;
-	req_pos++;
-	if (zd_chip_is_zd1211b(&mac->chip)) {
-		ioreqs[req_pos].addr = CR_BCN_LENGTH;
-		ioreqs[req_pos].value = full_len - 1;
-		req_pos++;
-	}
-
-	for (j = 0 ; j < beacon->len; j++) {
-		ioreqs[req_pos].addr = CR_BCN_FIFO;
-		ioreqs[req_pos].value = *((u8 *)(beacon->data + j));
-		req_pos++;
-	}
-
-	for (j = 0; j < 4; j++) {
-		ioreqs[req_pos].addr = CR_BCN_FIFO;
-		ioreqs[req_pos].value = 0x0;
-		req_pos++;
-	}
-
-	BUG_ON(req_pos != num_cmds);
-
-	r = zd_iowrite32a_locked(&mac->chip, ioreqs, num_cmds);
-
-release_sema:
-	/*
-	 * Try very hard to release device beacon semaphore, as otherwise
-	 * device/driver can be left in unusable state.
-	 */
-	end_jiffies = jiffies + HZ / 2; /*~500ms*/
-	ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE);
-	while (ret < 0) {
-		if (in_intr || time_is_before_eq_jiffies(end_jiffies)) {
-			ret = -ETIMEDOUT;
-			break;
-		}
-
-		msleep(20);
-		ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE);
-	}
-
-	if (ret < 0)
-		dev_err(zd_mac_dev(mac), "Could not release "
-					 "CR_BCN_FIFO_SEMAPHORE!\n");
-	if (r < 0 || ret < 0) {
-		if (r >= 0)
-			r = ret;
-
-		/* We don't know if beacon was written successfully or not,
-		 * so clear current. */
-		zd_mac_free_cur_beacon_locked(mac);
-
-		goto out;
-	}
-
-	/* Beacon has now been written successfully, update current. */
-	zd_mac_free_cur_beacon_locked(mac);
-	mac->beacon.cur_beacon = beacon;
-	beacon = NULL;
-
-	/* 802.11b/g 2.4G CCK 1Mb
-	 * 802.11a, not yet implemented, uses different values (see GPL vendor
-	 * driver)
-	 */
-	r = zd_iowrite32_locked(&mac->chip, 0x00000400 | (full_len << 19),
-				CR_BCN_PLCP_CFG);
-out:
-	kfree(ioreqs);
-out_nofree:
-	kfree_skb(beacon);
-	mutex_unlock(&mac->chip.mutex);
-
-	return r;
-
-reset_device:
-	zd_mac_free_cur_beacon_locked(mac);
-	kfree_skb(beacon);
-
-	mutex_unlock(&mac->chip.mutex);
-	kfree(ioreqs);
-
-	/* semaphore stuck, reset device to avoid fw freeze later */
-	dev_warn(zd_mac_dev(mac), "CR_BCN_FIFO_SEMAPHORE stuck, "
-				  "resetting device...");
-	usb_queue_reset_device(mac->chip.usb.intf);
-
-	return r;
-}
-
-static int fill_ctrlset(struct zd_mac *mac,
-			struct sk_buff *skb)
-{
-	int r;
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
-	unsigned int frag_len = skb->len + FCS_LEN;
-	unsigned int packet_length;
-	struct ieee80211_rate *txrate;
-	struct zd_ctrlset *cs = (struct zd_ctrlset *)
-		skb_push(skb, sizeof(struct zd_ctrlset));
-	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-
-	ZD_ASSERT(frag_len <= 0xffff);
-
-	/*
-	 * Firmware computes the duration itself (for all frames except PSPoll)
-	 * and needs the field set to 0 at input, otherwise firmware messes up
-	 * duration_id and sets bits 14 and 15 on.
-	 */
-	if (!ieee80211_is_pspoll(hdr->frame_control))
-		hdr->duration_id = 0;
-
-	txrate = ieee80211_get_tx_rate(mac->hw, info);
-
-	cs->modulation = txrate->hw_value;
-	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
-		cs->modulation = txrate->hw_value_short;
-
-	cs->tx_length = cpu_to_le16(frag_len);
-
-	cs_set_control(mac, cs, hdr, info);
-
-	packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
-	ZD_ASSERT(packet_length <= 0xffff);
-	/* ZD1211B: Computing the length difference this way, gives us
-	 * flexibility to compute the packet length.
-	 */
-	cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ?
-			packet_length - frag_len : packet_length);
-
-	/*
-	 * CURRENT LENGTH:
-	 * - transmit frame length in microseconds
-	 * - seems to be derived from frame length
-	 * - see Cal_Us_Service() in zdinlinef.h
-	 * - if macp->bTxBurstEnable is enabled, then multiply by 4
-	 *  - bTxBurstEnable is never set in the vendor driver
-	 *
-	 * SERVICE:
-	 * - "for PLCP configuration"
-	 * - always 0 except in some situations at 802.11b 11M
-	 * - see line 53 of zdinlinef.h
-	 */
-	cs->service = 0;
-	r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation),
-		                 le16_to_cpu(cs->tx_length));
-	if (r < 0)
-		return r;
-	cs->current_length = cpu_to_le16(r);
-	cs->next_frame_length = 0;
-
-	return 0;
-}
-
-/**
- * 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 void zd_op_tx(struct ieee80211_hw *hw,
-		     struct ieee80211_tx_control *control,
-		     struct sk_buff *skb)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-	int r;
-
-	r = fill_ctrlset(mac, skb);
-	if (r)
-		goto fail;
-
-	info->rate_driver_data[0] = hw;
-
-	r = zd_usb_tx(&mac->chip.usb, skb);
-	if (r)
-		goto fail;
-	return;
-
-fail:
-	dev_kfree_skb(skb);
-}
-
-/**
- * filter_ack - filters incoming packets for acknowledgements
- * @dev: the mac80211 device
- * @rx_hdr: received header
- * @stats: the status for the received packet
- *
- * 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.
- *
- * Returns 1 if the frame was an ACK, 0 if it was ignored.
- */
-static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr,
-		      struct ieee80211_rx_status *stats)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-	struct sk_buff *skb;
-	struct sk_buff_head *q;
-	unsigned long flags;
-	int found = 0;
-	int i, position = 0;
-
-	if (!ieee80211_is_ack(rx_hdr->frame_control))
-		return 0;
-
-	q = &mac->ack_wait_queue;
-	spin_lock_irqsave(&q->lock, flags);
-	skb_queue_walk(q, skb) {
-		struct ieee80211_hdr *tx_hdr;
-
-		position ++;
-
-		if (mac->ack_pending && skb_queue_is_first(q, skb))
-		    continue;
-
-		tx_hdr = (struct ieee80211_hdr *)skb->data;
-		if (likely(ether_addr_equal(tx_hdr->addr2, rx_hdr->addr1)))
-		{
-			found = 1;
-			break;
-		}
-	}
-
-	if (found) {
-		for (i=1; i<position; i++) {
-			skb = __skb_dequeue(q);
-			zd_mac_tx_status(hw, skb,
-					 mac->ack_pending ? mac->ack_signal : 0,
-					 NULL);
-			mac->ack_pending = 0;
-		}
-
-		mac->ack_pending = 1;
-		mac->ack_signal = stats->signal;
-
-		/* Prevent pending tx-packet on AP-mode */
-		if (mac->type == NL80211_IFTYPE_AP) {
-			skb = __skb_dequeue(q);
-			zd_mac_tx_status(hw, skb, mac->ack_signal, NULL);
-			mac->ack_pending = 0;
-		}
-	}
-
-	spin_unlock_irqrestore(&q->lock, flags);
-	return 1;
-}
-
-int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length)
-{
-	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;
-	__le16 fc;
-	int need_padding;
-	int i;
-	u8 rate;
-
-	if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ +
-	             FCS_LEN + sizeof(struct rx_status))
-		return -EINVAL;
-
-	memset(&stats, 0, sizeof(stats));
-
-	/* 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. */
-
-	/* 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) {
-		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;
-		}
-	}
-
-	stats.freq = zd_channels[_zd_chip_get_channel(&mac->chip) - 1].center_freq;
-	stats.band = IEEE80211_BAND_2GHZ;
-	stats.signal = zd_check_signal(hw, status->signal_strength);
-
-	rate = zd_rx_rate(buffer, status);
-
-	/* todo: return index in the big switches in zd_rx_rate instead */
-	for (i = 0; i < mac->band.n_bitrates; i++)
-		if (rate == mac->band.bitrates[i].hw_value)
-			stats.rate_idx = i;
-
-	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;
-
-	fc = get_unaligned((__le16*)buffer);
-	need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc);
-
-	skb = dev_alloc_skb(length + (need_padding ? 2 : 0));
-	if (skb == NULL)
-		return -ENOMEM;
-	if (need_padding) {
-		/* Make sure the payload data is 4 byte aligned. */
-		skb_reserve(skb, 2);
-	}
-
-	/* FIXME : could we avoid this big memcpy ? */
-	memcpy(skb_put(skb, length), buffer, length);
-
-	memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
-	ieee80211_rx_irqsafe(hw, skb);
-	return 0;
-}
-
-static int zd_op_add_interface(struct ieee80211_hw *hw,
-				struct ieee80211_vif *vif)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-
-	/* using NL80211_IFTYPE_UNSPECIFIED to indicate no mode selected */
-	if (mac->type != NL80211_IFTYPE_UNSPECIFIED)
-		return -EOPNOTSUPP;
-
-	switch (vif->type) {
-	case NL80211_IFTYPE_MONITOR:
-	case NL80211_IFTYPE_MESH_POINT:
-	case NL80211_IFTYPE_STATION:
-	case NL80211_IFTYPE_ADHOC:
-	case NL80211_IFTYPE_AP:
-		mac->type = vif->type;
-		break;
-	default:
-		return -EOPNOTSUPP;
-	}
-
-	mac->vif = vif;
-
-	return set_mac_and_bssid(mac);
-}
-
-static void zd_op_remove_interface(struct ieee80211_hw *hw,
-				    struct ieee80211_vif *vif)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-	mac->type = NL80211_IFTYPE_UNSPECIFIED;
-	mac->vif = NULL;
-	zd_set_beacon_interval(&mac->chip, 0, 0, NL80211_IFTYPE_UNSPECIFIED);
-	zd_write_mac_addr(&mac->chip, NULL);
-
-	zd_mac_free_cur_beacon(mac);
-}
-
-static int zd_op_config(struct ieee80211_hw *hw, u32 changed)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-	struct ieee80211_conf *conf = &hw->conf;
-
-	spin_lock_irq(&mac->lock);
-	mac->channel = conf->chandef.chan->hw_value;
-	spin_unlock_irq(&mac->lock);
-
-	return zd_chip_set_channel(&mac->chip, conf->chandef.chan->hw_value);
-}
-
-static void zd_beacon_done(struct zd_mac *mac)
-{
-	struct sk_buff *skb, *beacon;
-
-	if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
-		return;
-	if (!mac->vif || mac->vif->type != NL80211_IFTYPE_AP)
-		return;
-
-	/*
-	 * Send out buffered broad- and multicast frames.
-	 */
-	while (!ieee80211_queue_stopped(mac->hw, 0)) {
-		skb = ieee80211_get_buffered_bc(mac->hw, mac->vif);
-		if (!skb)
-			break;
-		zd_op_tx(mac->hw, NULL, skb);
-	}
-
-	/*
-	 * Fetch next beacon so that tim_count is updated.
-	 */
-	beacon = ieee80211_beacon_get(mac->hw, mac->vif);
-	if (beacon)
-		zd_mac_config_beacon(mac->hw, beacon, true);
-
-	spin_lock_irq(&mac->lock);
-	mac->beacon.last_update = jiffies;
-	spin_unlock_irq(&mac->lock);
-}
-
-static void zd_process_intr(struct work_struct *work)
-{
-	u16 int_status;
-	unsigned long flags;
-	struct zd_mac *mac = container_of(work, struct zd_mac, process_intr);
-
-	spin_lock_irqsave(&mac->lock, flags);
-	int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer + 4));
-	spin_unlock_irqrestore(&mac->lock, flags);
-
-	if (int_status & INT_CFG_NEXT_BCN) {
-		/*dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n");*/
-		zd_beacon_done(mac);
-	} else {
-		dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n");
-	}
-
-	zd_chip_enable_hwint(&mac->chip);
-}
-
-
-static u64 zd_op_prepare_multicast(struct ieee80211_hw *hw,
-				   struct netdev_hw_addr_list *mc_list)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-	struct zd_mc_hash hash;
-	struct netdev_hw_addr *ha;
-
-	zd_mc_clear(&hash);
-
-	netdev_hw_addr_list_for_each(ha, mc_list) {
-		dev_dbg_f(zd_mac_dev(mac), "mc addr %pM\n", ha->addr);
-		zd_mc_add_addr(&hash, ha->addr);
-	}
-
-	return hash.low | ((u64)hash.high << 32);
-}
-
-#define SUPPORTED_FIF_FLAGS \
-	(FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \
-	FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)
-static void zd_op_configure_filter(struct ieee80211_hw *hw,
-			unsigned int changed_flags,
-			unsigned int *new_flags,
-			u64 multicast)
-{
-	struct zd_mc_hash hash = {
-		.low = multicast,
-		.high = multicast >> 32,
-	};
-	struct zd_mac *mac = zd_hw_mac(hw);
-	unsigned long flags;
-	int r;
-
-	/* Only deal with supported flags */
-	changed_flags &= SUPPORTED_FIF_FLAGS;
-	*new_flags &= SUPPORTED_FIF_FLAGS;
-
-	/*
-	 * If multicast parameter (as returned by zd_op_prepare_multicast)
-	 * has changed, no bit in changed_flags is set. To handle this
-	 * situation, we do not return if changed_flags is 0. If we do so,
-	 * we will have some issue with IPv6 which uses multicast for link
-	 * layer address resolution.
-	 */
-	if (*new_flags & FIF_ALLMULTI)
-		zd_mc_add_all(&hash);
-
-	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);
-
-	zd_chip_set_multicast_hash(&mac->chip, &hash);
-
-	if (changed_flags & FIF_CONTROL) {
-		r = set_rx_filter(mac);
-		if (r)
-			dev_err(zd_mac_dev(mac), "set_rx_filter error %d\n", r);
-	}
-
-	/* 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 set_rts_cts(struct zd_mac *mac, unsigned int short_preamble)
-{
-	mutex_lock(&mac->chip.mutex);
-	zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble);
-	mutex_unlock(&mac->chip.mutex);
-}
-
-static void zd_op_bss_info_changed(struct ieee80211_hw *hw,
-				   struct ieee80211_vif *vif,
-				   struct ieee80211_bss_conf *bss_conf,
-				   u32 changes)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-	int associated;
-
-	dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
-
-	if (mac->type == NL80211_IFTYPE_MESH_POINT ||
-	    mac->type == NL80211_IFTYPE_ADHOC ||
-	    mac->type == NL80211_IFTYPE_AP) {
-		associated = true;
-		if (changes & BSS_CHANGED_BEACON) {
-			struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
-
-			if (beacon) {
-				zd_chip_disable_hwint(&mac->chip);
-				zd_mac_config_beacon(hw, beacon, false);
-				zd_chip_enable_hwint(&mac->chip);
-			}
-		}
-
-		if (changes & BSS_CHANGED_BEACON_ENABLED) {
-			u16 interval = 0;
-			u8 period = 0;
-
-			if (bss_conf->enable_beacon) {
-				period = bss_conf->dtim_period;
-				interval = bss_conf->beacon_int;
-			}
-
-			spin_lock_irq(&mac->lock);
-			mac->beacon.period = period;
-			mac->beacon.interval = interval;
-			mac->beacon.last_update = jiffies;
-			spin_unlock_irq(&mac->lock);
-
-			zd_set_beacon_interval(&mac->chip, interval, period,
-					       mac->type);
-		}
-	} else
-		associated = is_valid_ether_addr(bss_conf->bssid);
-
-	spin_lock_irq(&mac->lock);
-	mac->associated = associated;
-	spin_unlock_irq(&mac->lock);
-
-	/* TODO: do hardware bssid filtering */
-
-	if (changes & BSS_CHANGED_ERP_PREAMBLE) {
-		spin_lock_irq(&mac->lock);
-		mac->short_preamble = bss_conf->use_short_preamble;
-		spin_unlock_irq(&mac->lock);
-
-		set_rts_cts(mac, bss_conf->use_short_preamble);
-	}
-}
-
-static u64 zd_op_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
-{
-	struct zd_mac *mac = zd_hw_mac(hw);
-	return zd_chip_get_tsf(&mac->chip);
-}
-
-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,
-	.prepare_multicast	= zd_op_prepare_multicast,
-	.configure_filter	= zd_op_configure_filter,
-	.bss_info_changed	= zd_op_bss_info_changed,
-	.get_tsf		= zd_op_get_tsf,
-};
-
-struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf)
-{
-	struct zd_mac *mac;
-	struct ieee80211_hw *hw;
-
-	hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops);
-	if (!hw) {
-		dev_dbg_f(&intf->dev, "out of memory\n");
-		return NULL;
-	}
-
-	mac = zd_hw_mac(hw);
-
-	memset(mac, 0, sizeof(*mac));
-	spin_lock_init(&mac->lock);
-	mac->hw = hw;
-
-	mac->type = NL80211_IFTYPE_UNSPECIFIED;
-
-	memcpy(mac->channels, zd_channels, sizeof(zd_channels));
-	memcpy(mac->rates, zd_rates, sizeof(zd_rates));
-	mac->band.n_bitrates = ARRAY_SIZE(zd_rates);
-	mac->band.bitrates = mac->rates;
-	mac->band.n_channels = ARRAY_SIZE(zd_channels);
-	mac->band.channels = mac->channels;
-
-	hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &mac->band;
-
-	ieee80211_hw_set(hw, MFP_CAPABLE);
-	ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
-	ieee80211_hw_set(hw, RX_INCLUDES_FCS);
-	ieee80211_hw_set(hw, SIGNAL_UNSPEC);
-
-	hw->wiphy->interface_modes =
-		BIT(NL80211_IFTYPE_MESH_POINT) |
-		BIT(NL80211_IFTYPE_STATION) |
-		BIT(NL80211_IFTYPE_ADHOC) |
-		BIT(NL80211_IFTYPE_AP);
-
-	hw->max_signal = 100;
-	hw->queues = 1;
-	hw->extra_tx_headroom = sizeof(struct zd_ctrlset);
-
-	/*
-	 * Tell mac80211 that we support multi rate retries
-	 */
-	hw->max_rates = IEEE80211_TX_MAX_RATES;
-	hw->max_rate_tries = 18;	/* 9 rates * 2 retries/rate */
-
-	skb_queue_head_init(&mac->ack_wait_queue);
-	mac->ack_pending = 0;
-
-	zd_chip_init(&mac->chip, hw, intf);
-	housekeeping_init(mac);
-	beacon_init(mac);
-	INIT_WORK(&mac->process_intr, zd_process_intr);
-
-	SET_IEEE80211_DEV(hw, &intf->dev);
-	return hw;
-}
-
-#define BEACON_WATCHDOG_DELAY round_jiffies_relative(HZ)
-
-static void beacon_watchdog_handler(struct work_struct *work)
-{
-	struct zd_mac *mac =
-		container_of(work, struct zd_mac, beacon.watchdog_work.work);
-	struct sk_buff *beacon;
-	unsigned long timeout;
-	int interval, period;
-
-	if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
-		goto rearm;
-	if (mac->type != NL80211_IFTYPE_AP || !mac->vif)
-		goto rearm;
-
-	spin_lock_irq(&mac->lock);
-	interval = mac->beacon.interval;
-	period = mac->beacon.period;
-	timeout = mac->beacon.last_update +
-			msecs_to_jiffies(interval * 1024 / 1000) * 3;
-	spin_unlock_irq(&mac->lock);
-
-	if (interval > 0 && time_is_before_jiffies(timeout)) {
-		dev_dbg_f(zd_mac_dev(mac), "beacon interrupt stalled, "
-					   "restarting. "
-					   "(interval: %d, dtim: %d)\n",
-					   interval, period);
-
-		zd_chip_disable_hwint(&mac->chip);
-
-		beacon = ieee80211_beacon_get(mac->hw, mac->vif);
-		if (beacon) {
-			zd_mac_free_cur_beacon(mac);
-
-			zd_mac_config_beacon(mac->hw, beacon, false);
-		}
-
-		zd_set_beacon_interval(&mac->chip, interval, period, mac->type);
-
-		zd_chip_enable_hwint(&mac->chip);
-
-		spin_lock_irq(&mac->lock);
-		mac->beacon.last_update = jiffies;
-		spin_unlock_irq(&mac->lock);
-	}
-
-rearm:
-	queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work,
-			   BEACON_WATCHDOG_DELAY);
-}
-
-static void beacon_init(struct zd_mac *mac)
-{
-	INIT_DELAYED_WORK(&mac->beacon.watchdog_work, beacon_watchdog_handler);
-}
-
-static void beacon_enable(struct zd_mac *mac)
-{
-	dev_dbg_f(zd_mac_dev(mac), "\n");
-
-	mac->beacon.last_update = jiffies;
-	queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work,
-			   BEACON_WATCHDOG_DELAY);
-}
-
-static void beacon_disable(struct zd_mac *mac)
-{
-	dev_dbg_f(zd_mac_dev(mac), "\n");
-	cancel_delayed_work_sync(&mac->beacon.watchdog_work);
-
-	zd_mac_free_cur_beacon(mac);
-}
-
-#define LINK_LED_WORK_DELAY HZ
-
-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;
-	int is_associated;
-	int r;
-
-	if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
-		goto requeue;
-
-	spin_lock_irq(&mac->lock);
-	is_associated = mac->associated;
-	spin_unlock_irq(&mac->lock);
-
-	r = zd_chip_control_leds(chip,
-		                 is_associated ? ZD_LED_ASSOCIATED : ZD_LED_SCANNING);
-	if (r)
-		dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
-
-requeue:
-	queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
-		           LINK_LED_WORK_DELAY);
-}
-
-static void housekeeping_init(struct zd_mac *mac)
-{
-	INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
-}
-
-static void housekeeping_enable(struct zd_mac *mac)
-{
-	dev_dbg_f(zd_mac_dev(mac), "\n");
-	queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
-			   0);
-}
-
-static void housekeeping_disable(struct zd_mac *mac)
-{
-	dev_dbg_f(zd_mac_dev(mac), "\n");
-	cancel_delayed_work_sync(&mac->housekeeping.link_led_work);
-	zd_chip_control_leds(&mac->chip, ZD_LED_OFF);
-}