text: /*
  
    Broadcom B43legacy wireless driver
  
    Transmission (TX/RX) related functions.
  
    Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
    Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
    Copyright (C) 2005, 2006 Michael Buesch <m@bues.ch>
    Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
    Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
    Copyright (C) 2007 Larry Finger <Larry.Finger@lwfinger.net>
  
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
  
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
  
    You should have received a copy of the GNU General Public License
    along with this program; see the file COPYING.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
    Boston, MA 02110-1301, USA.
  
  */
  
  #include <net/dst.h>
  
  #include "xmit.h"
  #include "phy.h"
  #include "dma.h"
  #include "pio.h"
  
  
  /* Extract the bitrate out of a CCK PLCP header. */
  static u8 b43legacy_plcp_get_bitrate_idx_cck(struct b43legacy_plcp_hdr6 *plcp)
  {
  	switch (plcp->raw[0]) {
  	case 0x0A:
  		return 0;
  	case 0x14:
  		return 1;
  	case 0x37:
  		return 2;
  	case 0x6E:
  		return 3;
  	}
  	B43legacy_BUG_ON(1);
  	return -1;
  }
  
  /* Extract the bitrate out of an OFDM PLCP header. */
  static u8 b43legacy_plcp_get_bitrate_idx_ofdm(struct b43legacy_plcp_hdr6 *plcp,
  					      bool aphy)
  {
  	int base = aphy ? 0 : 4;
  
  	switch (plcp->raw[0] & 0xF) {
  	case 0xB:
  		return base + 0;
  	case 0xF:
  		return base + 1;
  	case 0xA:
  		return base + 2;
  	case 0xE:
  		return base + 3;
  	case 0x9:
  		return base + 4;
  	case 0xD:
  		return base + 5;
  	case 0x8:
  		return base + 6;
  	case 0xC:
  		return base + 7;
  	}
  	B43legacy_BUG_ON(1);
  	return -1;
  }
  
  u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate)
  {
  	switch (bitrate) {
  	case B43legacy_CCK_RATE_1MB:
  		return 0x0A;
  	case B43legacy_CCK_RATE_2MB:
  		return 0x14;
  	case B43legacy_CCK_RATE_5MB:
  		return 0x37;
  	case B43legacy_CCK_RATE_11MB:
  		return 0x6E;
  	}
  	B43legacy_BUG_ON(1);
  	return 0;
  }
  
  u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate)
  {
  	switch (bitrate) {
  	case B43legacy_OFDM_RATE_6MB:
  		return 0xB;
  	case B43legacy_OFDM_RATE_9MB:
  		return 0xF;
  	case B43legacy_OFDM_RATE_12MB:
  		return 0xA;
  	case B43legacy_OFDM_RATE_18MB:
  		return 0xE;
  	case B43legacy_OFDM_RATE_24MB:
  		return 0x9;
  	case B43legacy_OFDM_RATE_36MB:
  		return 0xD;
  	case B43legacy_OFDM_RATE_48MB:
  		return 0x8;
  	case B43legacy_OFDM_RATE_54MB:
  		return 0xC;
  	}
  	B43legacy_BUG_ON(1);
  	return 0;
  }
  
  void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
  				 const u16 octets, const u8 bitrate)
  {
  	__le32 *data = &(plcp->data);
  	__u8 *raw = plcp->raw;
  
  	if (b43legacy_is_ofdm_rate(bitrate)) {
  		u16 d;
  
  		d = b43legacy_plcp_get_ratecode_ofdm(bitrate);
  		B43legacy_WARN_ON(octets & 0xF000);
  		d |= (octets << 5);
  		*data = cpu_to_le32(d);
  	} else {
  		u32 plen;
  
  		plen = octets * 16 / bitrate;
  		if ((octets * 16 % bitrate) > 0) {
  			plen++;
  			if ((bitrate == B43legacy_CCK_RATE_11MB)
  			    && ((octets * 8 % 11) < 4))
  				raw[1] = 0x84;
  			else
  				raw[1] = 0x04;
  		} else
  			raw[1] = 0x04;
  		*data |= cpu_to_le32(plen << 16);
  		raw[0] = b43legacy_plcp_get_ratecode_cck(bitrate);
  	}
  }
  
  static u8 b43legacy_calc_fallback_rate(u8 bitrate)
  {
  	switch (bitrate) {
  	case B43legacy_CCK_RATE_1MB:
  		return B43legacy_CCK_RATE_1MB;
  	case B43legacy_CCK_RATE_2MB:
  		return B43legacy_CCK_RATE_1MB;
  	case B43legacy_CCK_RATE_5MB:
  		return B43legacy_CCK_RATE_2MB;
  	case B43legacy_CCK_RATE_11MB:
  		return B43legacy_CCK_RATE_5MB;
  	case B43legacy_OFDM_RATE_6MB:
  		return B43legacy_CCK_RATE_5MB;
  	case B43legacy_OFDM_RATE_9MB:
  		return B43legacy_OFDM_RATE_6MB;
  	case B43legacy_OFDM_RATE_12MB:
  		return B43legacy_OFDM_RATE_9MB;
  	case B43legacy_OFDM_RATE_18MB:
  		return B43legacy_OFDM_RATE_12MB;
  	case B43legacy_OFDM_RATE_24MB:
  		return B43legacy_OFDM_RATE_18MB;
  	case B43legacy_OFDM_RATE_36MB:
  		return B43legacy_OFDM_RATE_24MB;
  	case B43legacy_OFDM_RATE_48MB:
  		return B43legacy_OFDM_RATE_36MB;
  	case B43legacy_OFDM_RATE_54MB:
  		return B43legacy_OFDM_RATE_48MB;
  	}
  	B43legacy_BUG_ON(1);
  	return 0;
  }
  
  static int generate_txhdr_fw3(struct b43legacy_wldev *dev,
  			       struct b43legacy_txhdr_fw3 *txhdr,
  			       const unsigned char *fragment_data,
  			       unsigned int fragment_len,
  			       struct ieee80211_tx_info *info,
  			       u16 cookie)
  {
  	const struct ieee80211_hdr *wlhdr;
  	int use_encryption = !!info->control.hw_key;
  	u8 rate;
  	struct ieee80211_rate *rate_fb;
  	int rate_ofdm;
  	int rate_fb_ofdm;
  	unsigned int plcp_fragment_len;
  	u32 mac_ctl = 0;
  	u16 phy_ctl = 0;
  	struct ieee80211_rate *tx_rate;
  	struct ieee80211_tx_rate *rates;
  
  	wlhdr = (const struct ieee80211_hdr *)fragment_data;
  
  	memset(txhdr, 0, sizeof(*txhdr));
  
  	tx_rate = ieee80211_get_tx_rate(dev->wl->hw, info);
  
  	rate = tx_rate->hw_value;
  	rate_ofdm = b43legacy_is_ofdm_rate(rate);
  	rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
  	rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
  
  	txhdr->mac_frame_ctl = wlhdr->frame_control;
  	memcpy(txhdr->tx_receiver, wlhdr->addr1, ETH_ALEN);
  
  	/* Calculate duration for fallback rate */
  	if ((rate_fb->hw_value == rate) ||
  	    (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
  	    (wlhdr->duration_id == cpu_to_le16(0))) {
  		/* If the fallback rate equals the normal rate or the
  		 * dur_id field contains an AID, CFP magic or 0,
  		 * use the original dur_id field. */
  		txhdr->dur_fb = wlhdr->duration_id;
  	} else {
  		txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
  							 info->control.vif,
  							 info->band,
  							 fragment_len,
  							 rate_fb);
  	}
  
  	plcp_fragment_len = fragment_len + FCS_LEN;
  	if (use_encryption) {
  		u8 key_idx = info->control.hw_key->hw_key_idx;
  		struct b43legacy_key *key;
  		int wlhdr_len;
  		size_t iv_len;
  
  		B43legacy_WARN_ON(key_idx >= dev->max_nr_keys);
  		key = &(dev->key[key_idx]);
  
  		if (key->enabled) {
  			/* Hardware appends ICV. */
  			plcp_fragment_len += info->control.hw_key->icv_len;
  
  			key_idx = b43legacy_kidx_to_fw(dev, key_idx);
  			mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
  				   B43legacy_TX4_MAC_KEYIDX;
  			mac_ctl |= (key->algorithm <<
  				   B43legacy_TX4_MAC_KEYALG_SHIFT) &
  				   B43legacy_TX4_MAC_KEYALG;
  			wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
  			iv_len = min_t(size_t, info->control.hw_key->iv_len,
  				     ARRAY_SIZE(txhdr->iv));
  			memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
  		} else {
  			/* This key is invalid. This might only happen
  			 * in a short timeframe after machine resume before
  			 * we were able to reconfigure keys.
  			 * Drop this packet completely. Do not transmit it
  			 * unencrypted to avoid leaking information. */
  			return -ENOKEY;
  		}
  	}
  	b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
  				    (&txhdr->plcp), plcp_fragment_len,
  				    rate);
  	b43legacy_generate_plcp_hdr(&txhdr->plcp_fb, plcp_fragment_len,
  				    rate_fb->hw_value);
  
  	/* PHY TX Control word */
  	if (rate_ofdm)
  		phy_ctl |= B43legacy_TX4_PHY_ENC_OFDM;
  	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
  		phy_ctl |= B43legacy_TX4_PHY_SHORTPRMBL;
  	phy_ctl |= B43legacy_TX4_PHY_ANTLAST;
  
  	/* MAC control */
  	rates = info->control.rates;
  	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
  		mac_ctl |= B43legacy_TX4_MAC_ACK;
  	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
  		mac_ctl |= B43legacy_TX4_MAC_HWSEQ;
  	if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
  		mac_ctl |= B43legacy_TX4_MAC_STMSDU;
  	if (rate_fb_ofdm)
  		mac_ctl |= B43legacy_TX4_MAC_FALLBACKOFDM;
  
  	/* Overwrite rates[0].count to make the retry calculation
  	 * in the tx status easier. need the actual retry limit to
  	 * detect whether the fallback rate was used.
  	 */
  	if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
  	    (rates[0].count <= dev->wl->hw->conf.long_frame_max_tx_count)) {
  		rates[0].count = dev->wl->hw->conf.long_frame_max_tx_count;
  		mac_ctl |= B43legacy_TX4_MAC_LONGFRAME;
  	} else {
  		rates[0].count = dev->wl->hw->conf.short_frame_max_tx_count;
  	}
  
  	/* Generate the RTS or CTS-to-self frame */
  	if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
  	    (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
  		unsigned int len;
  		struct ieee80211_hdr *hdr;
  		int rts_rate;
  		int rts_rate_fb;
  		int rts_rate_fb_ofdm;
  
  		rts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info)->hw_value;
  		rts_rate_fb = b43legacy_calc_fallback_rate(rts_rate);
  		rts_rate_fb_ofdm = b43legacy_is_ofdm_rate(rts_rate_fb);
  		if (rts_rate_fb_ofdm)
  			mac_ctl |= B43legacy_TX4_MAC_CTSFALLBACKOFDM;
  
  		if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
  			ieee80211_ctstoself_get(dev->wl->hw,
  						info->control.vif,
  						fragment_data,
  						fragment_len, info,
  						(struct ieee80211_cts *)
  						(txhdr->rts_frame));
  			mac_ctl |= B43legacy_TX4_MAC_SENDCTS;
  			len = sizeof(struct ieee80211_cts);
  		} else {
  			ieee80211_rts_get(dev->wl->hw,
  					  info->control.vif,
  					  fragment_data, fragment_len, info,
  					  (struct ieee80211_rts *)
  					  (txhdr->rts_frame));
  			mac_ctl |= B43legacy_TX4_MAC_SENDRTS;
  			len = sizeof(struct ieee80211_rts);
  		}
  		len += FCS_LEN;
  		b43legacy_generate_plcp_hdr((struct b43legacy_plcp_hdr4 *)
  					    (&txhdr->rts_plcp),
  					    len, rts_rate);
  		b43legacy_generate_plcp_hdr(&txhdr->rts_plcp_fb,
  					    len, rts_rate_fb);
  		hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
  		txhdr->rts_dur_fb = hdr->duration_id;
  	}
  
  	/* Magic cookie */
  	txhdr->cookie = cpu_to_le16(cookie);
  
  	/* Apply the bitfields */
  	txhdr->mac_ctl = cpu_to_le32(mac_ctl);
  	txhdr->phy_ctl = cpu_to_le16(phy_ctl);
  
  	return 0;
  }
  
  int b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
  			      u8 *txhdr,
  			      const unsigned char *fragment_data,
  			      unsigned int fragment_len,
  			      struct ieee80211_tx_info *info,
  			      u16 cookie)
  {
  	return generate_txhdr_fw3(dev, (struct b43legacy_txhdr_fw3 *)txhdr,
  			   fragment_data, fragment_len,
  			   info, cookie);
  }
  
  static s8 b43legacy_rssi_postprocess(struct b43legacy_wldev *dev,
  				     u8 in_rssi, int ofdm,
  				     int adjust_2053, int adjust_2050)
  {
  	struct b43legacy_phy *phy = &dev->phy;
  	s32 tmp;
  
  	switch (phy->radio_ver) {
  	case 0x2050:
  		if (ofdm) {
  			tmp = in_rssi;
  			if (tmp > 127)
  				tmp -= 256;
  			tmp *= 73;
  			tmp /= 64;
  			if (adjust_2050)
  				tmp += 25;
  			else
  				tmp -= 3;
  		} else {
  			if (dev->dev->bus->sprom.boardflags_lo
  			    & B43legacy_BFL_RSSI) {
  				if (in_rssi > 63)
  					in_rssi = 63;
  				tmp = phy->nrssi_lt[in_rssi];
  				tmp = 31 - tmp;
  				tmp *= -131;
  				tmp /= 128;
  				tmp -= 57;
  			} else {
  				tmp = in_rssi;
  				tmp = 31 - tmp;
  				tmp *= -149;
  				tmp /= 128;
  				tmp -= 68;
  			}
  			if (phy->type == B43legacy_PHYTYPE_G &&
  			    adjust_2050)
  				tmp += 25;
  		}
  		break;
  	case 0x2060:
  		if (in_rssi > 127)
  			tmp = in_rssi - 256;
  		else
  			tmp = in_rssi;
  		break;
  	default:
  		tmp = in_rssi;
  		tmp -= 11;
  		tmp *= 103;
  		tmp /= 64;
  		if (adjust_2053)
  			tmp -= 109;
  		else
  			tmp -= 83;
  	}
  
  	return (s8)tmp;
  }
  
  void b43legacy_rx(struct b43legacy_wldev *dev,
  		  struct sk_buff *skb,
  		  const void *_rxhdr)
  {
  	struct ieee80211_rx_status status;
  	struct b43legacy_plcp_hdr6 *plcp;
  	struct ieee80211_hdr *wlhdr;
  	const struct b43legacy_rxhdr_fw3 *rxhdr = _rxhdr;
  	__le16 fctl;
  	u16 phystat0;
  	u16 phystat3;
  	u16 chanstat;
  	u16 mactime;
  	u32 macstat;
  	u16 chanid;
  	u8 jssi;
  	int padding;
  
  	memset(&status, 0, sizeof(status));
  
  	/* Get metadata about the frame from the header. */
  	phystat0 = le16_to_cpu(rxhdr->phy_status0);
  	phystat3 = le16_to_cpu(rxhdr->phy_status3);
  	jssi = rxhdr->jssi;
  	macstat = le16_to_cpu(rxhdr->mac_status);
  	mactime = le16_to_cpu(rxhdr->mac_time);
  	chanstat = le16_to_cpu(rxhdr->channel);
  
  	if (macstat & B43legacy_RX_MAC_FCSERR)
  		dev->wl->ieee_stats.dot11FCSErrorCount++;
  
  	/* Skip PLCP and padding */
  	padding = (macstat & B43legacy_RX_MAC_PADDING) ? 2 : 0;
  	if (unlikely(skb->len < (sizeof(struct b43legacy_plcp_hdr6) +
  	    padding))) {
  		b43legacydbg(dev->wl, "RX: Packet size underrun (1)\n");
  		goto drop;
  	}
  	plcp = (struct b43legacy_plcp_hdr6 *)(skb->data + padding);
  	skb_pull(skb, sizeof(struct b43legacy_plcp_hdr6) + padding);
  	/* The skb contains the Wireless Header + payload data now */
  	if (unlikely(skb->len < (2+2+6/*minimum hdr*/ + FCS_LEN))) {
  		b43legacydbg(dev->wl, "RX: Packet size underrun (2)\n");
  		goto drop;
  	}
  	wlhdr = (struct ieee80211_hdr *)(skb->data);
  	fctl = wlhdr->frame_control;
  
  	if ((macstat & B43legacy_RX_MAC_DEC) &&
  	    !(macstat & B43legacy_RX_MAC_DECERR)) {
  		unsigned int keyidx;
  		int wlhdr_len;
  		int iv_len;
  		int icv_len;
  
  		keyidx = ((macstat & B43legacy_RX_MAC_KEYIDX)
  			  >> B43legacy_RX_MAC_KEYIDX_SHIFT);
  		/* We must adjust the key index here. We want the "physical"
  		 * key index, but the ucode passed it slightly different.
  		 */
  		keyidx = b43legacy_kidx_to_raw(dev, keyidx);
  		B43legacy_WARN_ON(keyidx >= dev->max_nr_keys);
  
  		if (dev->key[keyidx].algorithm != B43legacy_SEC_ALGO_NONE) {
  			/* Remove PROTECTED flag to mark it as decrypted. */
  			B43legacy_WARN_ON(!ieee80211_has_protected(fctl));
  			fctl &= ~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  			wlhdr->frame_control = fctl;
  
  			wlhdr_len = ieee80211_hdrlen(fctl);
  			if (unlikely(skb->len < (wlhdr_len + 3))) {
  				b43legacydbg(dev->wl, "RX: Packet size"
  					     " underrun3\n");
  				goto drop;
  			}
  			if (skb->data[wlhdr_len + 3] & (1 << 5)) {
  				/* The Ext-IV Bit is set in the "KeyID"
  				 * octet of the IV.
  				 */
  				iv_len = 8;
  				icv_len = 8;
  			} else {
  				iv_len = 4;
  				icv_len = 4;
  			}
  			if (unlikely(skb->len < (wlhdr_len + iv_len +
  			    icv_len))) {
  				b43legacydbg(dev->wl, "RX: Packet size"
  					     " underrun4\n");
  				goto drop;
  			}
  			/* Remove the IV */
  			memmove(skb->data + iv_len, skb->data, wlhdr_len);
  			skb_pull(skb, iv_len);
  			/* Remove the ICV */
  			skb_trim(skb, skb->len - icv_len);
  
  			status.flag |= RX_FLAG_DECRYPTED;
  		}
  	}
  
  	status.signal = b43legacy_rssi_postprocess(dev, jssi,
  				      (phystat0 & B43legacy_RX_PHYST0_OFDM),
  				      (phystat0 & B43legacy_RX_PHYST0_GAINCTL),
  				      (phystat3 & B43legacy_RX_PHYST3_TRSTATE));
  	/* change to support A PHY */
  	if (phystat0 & B43legacy_RX_PHYST0_OFDM)
  		status.rate_idx = b43legacy_plcp_get_bitrate_idx_ofdm(plcp, false);
  	else
  		status.rate_idx = b43legacy_plcp_get_bitrate_idx_cck(plcp);
  	status.antenna = !!(phystat0 & B43legacy_RX_PHYST0_ANT);
  
  	/*
  	 * All frames on monitor interfaces and beacons always need a full
  	 * 64-bit timestamp. Monitor interfaces need it for diagnostic
  	 * purposes and beacons for IBSS merging.
  	 * This code assumes we get to process the packet within 16 bits
  	 * of timestamp, i.e. about 65 milliseconds after the PHY received
  	 * the first symbol.
  	 */
  	if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
  		u16 low_mactime_now;
  
  		b43legacy_tsf_read(dev, &status.mactime);
  		low_mactime_now = status.mactime;
  		status.mactime = status.mactime & ~0xFFFFULL;
  		status.mactime += mactime;
  		if (low_mactime_now <= mactime)
  			status.mactime -= 0x10000;
  		status.flag |= RX_FLAG_MACTIME_START;
  	}
  
  	chanid = (chanstat & B43legacy_RX_CHAN_ID) >>
  		  B43legacy_RX_CHAN_ID_SHIFT;
  	switch (chanstat & B43legacy_RX_CHAN_PHYTYPE) {
  	case B43legacy_PHYTYPE_B:
  	case B43legacy_PHYTYPE_G:
  		status.band = NL80211_BAND_2GHZ;
  		status.freq = chanid + 2400;
  		break;
  	default:
  		b43legacywarn(dev->wl, "Unexpected value for chanstat (0x%X)\n",
  		       chanstat);
  	}
  
  	memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
  	ieee80211_rx_irqsafe(dev->wl->hw, skb);
  
  	return;
  drop:
  	b43legacydbg(dev->wl, "RX: Packet dropped\n");
  	dev_kfree_skb_any(skb);
  }
  
  void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
  			     const struct b43legacy_txstatus *status)
  {
  	b43legacy_debugfs_log_txstat(dev, status);
  
  	if (status->intermediate)
  		return;
  	if (status->for_ampdu)
  		return;
  	if (!status->acked)
  		dev->wl->ieee_stats.dot11ACKFailureCount++;
  	if (status->rts_count) {
  		if (status->rts_count == 0xF) /* FIXME */
  			dev->wl->ieee_stats.dot11RTSFailureCount++;
  		else
  			dev->wl->ieee_stats.dot11RTSSuccessCount++;
  	}
  
  	if (b43legacy_using_pio(dev))
  		b43legacy_pio_handle_txstatus(dev, status);
  	else
  		b43legacy_dma_handle_txstatus(dev, status);
  }
  
  /* Handle TX status report as received through DMA/PIO queues */
  void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
  				 const struct b43legacy_hwtxstatus *hw)
  {
  	struct b43legacy_txstatus status;
  	u8 tmp;
  
  	status.cookie = le16_to_cpu(hw->cookie);
  	status.seq = le16_to_cpu(hw->seq);
  	status.phy_stat = hw->phy_stat;
  	tmp = hw->count;
  	status.frame_count = (tmp >> 4);
  	status.rts_count = (tmp & 0x0F);
  	tmp = hw->flags << 1;
  	status.supp_reason = ((tmp & 0x1C) >> 2);
  	status.pm_indicated = !!(tmp & 0x80);
  	status.intermediate = !!(tmp & 0x40);
  	status.for_ampdu = !!(tmp & 0x20);
  	status.acked = !!(tmp & 0x02);
  
  	b43legacy_handle_txstatus(dev, &status);
  }
  
  /* Stop any TX operation on the device (suspend the hardware queues) */
  void b43legacy_tx_suspend(struct b43legacy_wldev *dev)
  {
  	if (b43legacy_using_pio(dev))
  		b43legacy_pio_freeze_txqueues(dev);
  	else
  		b43legacy_dma_tx_suspend(dev);
  }
  
  /* Resume any TX operation on the device (resume the hardware queues) */
  void b43legacy_tx_resume(struct b43legacy_wldev *dev)
  {
  	if (b43legacy_using_pio(dev))
  		b43legacy_pio_thaw_txqueues(dev);
  	else
  		b43legacy_dma_tx_resume(dev);
  }
  
  /* Initialize the QoS parameters */
  void b43legacy_qos_init(struct b43legacy_wldev *dev)
  {
  	/* FIXME: This function must probably be called from the mac80211
  	 * config callback. */
  return;
  
  	b43legacy_hf_write(dev, b43legacy_hf_read(dev) | B43legacy_HF_EDCF);
  	/* FIXME kill magic */
  	b43legacy_write16(dev, 0x688,
  			  b43legacy_read16(dev, 0x688) | 0x4);
  
  
  	/*TODO: We might need some stack support here to get the values. */
  }
  