Initial import

1 files changed, 1112 insertions, 0 deletions

diff --git a/drivers/staging/vt6656/rxtx.c b/drivers/staging/vt6656/rxtx.c
new file mode 100644
index 000000000..5c589962a
--- /dev/null
+++ b/drivers/staging/vt6656/rxtx.c
@@ -0,0 +1,1112 @@
+/*
+ * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
+ * All rights reserved.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * File: rxtx.c
+ *
+ * Purpose: handle WMAC/802.3/802.11 rx & tx functions
+ *
+ * Author: Lyndon Chen
+ *
+ * Date: May 20, 2003
+ *
+ * Functions:
+ *      vnt_generate_tx_parameter - Generate tx dma required parameter.
+ *      vnt_get_duration_le - get tx data required duration
+ *      vnt_get_rtscts_duration_le- get rtx/cts required duration
+ *      vnt_get_rtscts_rsvtime_le- get rts/cts reserved time
+ *      vnt_get_rsvtime- get frame reserved time
+ *      vnt_fill_cts_head- fulfill CTS ctl header
+ *
+ * Revision History:
+ *
+ */
+
+#include <linux/etherdevice.h>
+#include "device.h"
+#include "rxtx.h"
+#include "card.h"
+#include "mac.h"
+#include "rf.h"
+#include "usbpipe.h"
+
+static const u16 vnt_time_stampoff[2][MAX_RATE] = {
+	{384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},/* Long Preamble */
+	{384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},/* Short Preamble */
+};
+
+static const u16 vnt_fb_opt0[2][5] = {
+	{RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */
+	{RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */
+};
+
+static const u16 vnt_fb_opt1[2][5] = {
+	{RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */
+	{RATE_6M,  RATE_6M,  RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */
+};
+
+#define RTSDUR_BB       0
+#define RTSDUR_BA       1
+#define RTSDUR_AA       2
+#define CTSDUR_BA       3
+#define RTSDUR_BA_F0    4
+#define RTSDUR_AA_F0    5
+#define RTSDUR_BA_F1    6
+#define RTSDUR_AA_F1    7
+#define CTSDUR_BA_F0    8
+#define CTSDUR_BA_F1    9
+#define DATADUR_B       10
+#define DATADUR_A       11
+#define DATADUR_A_F0    12
+#define DATADUR_A_F1    13
+
+static struct vnt_usb_send_context
+	*vnt_get_free_context(struct vnt_private *priv)
+{
+	struct vnt_usb_send_context *context = NULL;
+	int ii;
+
+	dev_dbg(&priv->usb->dev, "%s\n", __func__);
+
+	for (ii = 0; ii < priv->num_tx_context; ii++) {
+		if (!priv->tx_context[ii])
+			return NULL;
+
+		context = priv->tx_context[ii];
+		if (context->in_use == false) {
+			context->in_use = true;
+			memset(context->data, 0,
+					MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
+
+			context->hdr = NULL;
+
+			return context;
+		}
+	}
+
+	if (ii == priv->num_tx_context)
+		dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
+
+	return NULL;
+}
+
+static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
+{
+	return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
+							[rate % MAX_RATE]);
+}
+
+static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
+	u32 frame_length, u16 rate, int need_ack)
+{
+	u32 data_time, ack_time;
+
+	data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
+							frame_length, rate);
+
+	if (pkt_type == PK_TYPE_11B)
+		ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
+					14, (u16)priv->top_cck_basic_rate);
+	else
+		ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
+					14, (u16)priv->top_ofdm_basic_rate);
+
+	if (need_ack)
+		return data_time + priv->sifs + ack_time;
+
+	return data_time;
+}
+
+static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
+	u32 frame_length, u16 rate, int need_ack)
+{
+	return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
+		frame_length, rate, need_ack));
+}
+
+static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv,
+	u8 rsv_type, u8 pkt_type, u32 frame_length, u16 current_rate)
+{
+	u32 rrv_time, rts_time, cts_time, ack_time, data_time;
+
+	rrv_time = rts_time = cts_time = ack_time = data_time = 0;
+
+	data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
+						frame_length, current_rate);
+
+	if (rsv_type == 0) {
+		rts_time = vnt_get_frame_time(priv->preamble_type,
+			pkt_type, 20, priv->top_cck_basic_rate);
+		cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
+			pkt_type, 14, priv->top_cck_basic_rate);
+	} else if (rsv_type == 1) {
+		rts_time = vnt_get_frame_time(priv->preamble_type,
+			pkt_type, 20, priv->top_cck_basic_rate);
+		cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
+			14, priv->top_cck_basic_rate);
+		ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
+			14, priv->top_ofdm_basic_rate);
+	} else if (rsv_type == 2) {
+		rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
+			20, priv->top_ofdm_basic_rate);
+		cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
+			pkt_type, 14, priv->top_ofdm_basic_rate);
+	} else if (rsv_type == 3) {
+		cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
+			14, priv->top_cck_basic_rate);
+		ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
+			14, priv->top_ofdm_basic_rate);
+
+		rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
+
+		return cpu_to_le16((u16)rrv_time);
+	}
+
+	rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
+
+	return cpu_to_le16((u16)rrv_time);
+}
+
+static __le16 vnt_get_duration_le(struct vnt_private *priv,
+					u8 pkt_type, int need_ack)
+{
+	u32 ack_time = 0;
+
+	if (need_ack) {
+		if (pkt_type == PK_TYPE_11B)
+			ack_time = vnt_get_frame_time(priv->preamble_type,
+				pkt_type, 14, priv->top_cck_basic_rate);
+		else
+			ack_time = vnt_get_frame_time(priv->preamble_type,
+				pkt_type, 14, priv->top_ofdm_basic_rate);
+
+		return cpu_to_le16((u16)(priv->sifs + ack_time));
+	}
+
+	return 0;
+}
+
+static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
+					 u8 dur_type, u8 pkt_type, u16 rate)
+{
+	struct vnt_private *priv = context->priv;
+	u32 cts_time = 0, dur_time = 0;
+	u32 frame_length = context->frame_len;
+	u8 need_ack = context->need_ack;
+
+	switch (dur_type) {
+	case RTSDUR_BB:
+	case RTSDUR_BA:
+	case RTSDUR_BA_F0:
+	case RTSDUR_BA_F1:
+		cts_time = vnt_get_frame_time(priv->preamble_type,
+				pkt_type, 14, priv->top_cck_basic_rate);
+		dur_time = cts_time + 2 * priv->sifs +
+			vnt_get_rsvtime(priv, pkt_type,
+						frame_length, rate, need_ack);
+		break;
+
+	case RTSDUR_AA:
+	case RTSDUR_AA_F0:
+	case RTSDUR_AA_F1:
+		cts_time = vnt_get_frame_time(priv->preamble_type,
+				pkt_type, 14, priv->top_ofdm_basic_rate);
+		dur_time = cts_time + 2 * priv->sifs +
+			vnt_get_rsvtime(priv, pkt_type,
+						frame_length, rate, need_ack);
+		break;
+
+	case CTSDUR_BA:
+	case CTSDUR_BA_F0:
+	case CTSDUR_BA_F1:
+		dur_time = priv->sifs + vnt_get_rsvtime(priv,
+				pkt_type, frame_length, rate, need_ack);
+		break;
+
+	default:
+		break;
+	}
+
+	return cpu_to_le16((u16)dur_time);
+}
+
+static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
+	struct ieee80211_hdr *hdr)
+{
+	u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
+	u8 *hdr_pos = (u8 *)hdr;
+
+	tx_context->hdr = hdr;
+	if (!tx_context->hdr)
+		return 0;
+
+	return (u16)(hdr_pos - head);
+}
+
+static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
+			       struct vnt_tx_datahead_g *buf)
+{
+
+	struct vnt_private *priv = tx_context->priv;
+	struct ieee80211_hdr *hdr =
+				(struct ieee80211_hdr *)tx_context->skb->data;
+	u32 frame_len = tx_context->frame_len;
+	u16 rate = tx_context->tx_rate;
+	u8 need_ack = tx_context->need_ack;
+
+	/* Get SignalField,ServiceField,Length */
+	vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
+	vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
+							PK_TYPE_11B, &buf->b);
+
+	/* Get Duration and TimeStamp */
+	if (ieee80211_is_pspoll(hdr->frame_control)) {
+		__le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
+
+		buf->duration_a = dur;
+		buf->duration_b = dur;
+	} else {
+		buf->duration_a = vnt_get_duration_le(priv,
+						tx_context->pkt_type, need_ack);
+		buf->duration_b = vnt_get_duration_le(priv,
+							PK_TYPE_11B, need_ack);
+	}
+
+	buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
+	buf->time_stamp_off_b = vnt_time_stamp_off(priv,
+					priv->top_cck_basic_rate);
+
+	tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
+
+	return le16_to_cpu(buf->duration_a);
+}
+
+static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
+				  struct vnt_tx_datahead_g_fb *buf)
+{
+	struct vnt_private *priv = tx_context->priv;
+	u32 frame_len = tx_context->frame_len;
+	u16 rate = tx_context->tx_rate;
+	u8 need_ack = tx_context->need_ack;
+
+	/* Get SignalField,ServiceField,Length */
+	vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
+
+	vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
+						PK_TYPE_11B, &buf->b);
+
+	/* Get Duration and TimeStamp */
+	buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
+					      need_ack);
+	buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
+
+	buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
+						 need_ack);
+	buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
+						 need_ack);
+
+	buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
+	buf->time_stamp_off_b = vnt_time_stamp_off(priv,
+						priv->top_cck_basic_rate);
+
+	tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
+
+	return le16_to_cpu(buf->duration_a);
+}
+
+static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
+				  struct vnt_tx_datahead_a_fb *buf)
+{
+	struct vnt_private *priv = tx_context->priv;
+	u16 rate = tx_context->tx_rate;
+	u8 pkt_type = tx_context->pkt_type;
+	u8 need_ack = tx_context->need_ack;
+	u32 frame_len = tx_context->frame_len;
+
+	/* Get SignalField,ServiceField,Length */
+	vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
+	/* Get Duration and TimeStampOff */
+	buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
+
+	buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
+	buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
+
+	buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
+
+	tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
+
+	return le16_to_cpu(buf->duration);
+}
+
+static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
+				struct vnt_tx_datahead_ab *buf)
+{
+	struct vnt_private *priv = tx_context->priv;
+	struct ieee80211_hdr *hdr =
+				(struct ieee80211_hdr *)tx_context->skb->data;
+	u32 frame_len = tx_context->frame_len;
+	u16 rate = tx_context->tx_rate;
+	u8 need_ack = tx_context->need_ack;
+
+	/* Get SignalField,ServiceField,Length */
+	vnt_get_phy_field(priv, frame_len, rate,
+			  tx_context->pkt_type, &buf->ab);
+
+	/* Get Duration and TimeStampOff */
+	if (ieee80211_is_pspoll(hdr->frame_control)) {
+		__le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
+
+		buf->duration = dur;
+	} else {
+		buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
+						    need_ack);
+	}
+
+	buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
+
+	tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
+
+	return le16_to_cpu(buf->duration);
+}
+
+static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
+	struct ieee80211_rts *rts, __le16 duration)
+{
+	struct ieee80211_hdr *hdr =
+				(struct ieee80211_hdr *)tx_context->skb->data;
+
+	rts->duration = duration;
+	rts->frame_control =
+		cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
+
+	ether_addr_copy(rts->ra, hdr->addr1);
+	ether_addr_copy(rts->ta, hdr->addr2);
+
+	return 0;
+}
+
+static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
+			       struct vnt_rts_g *buf)
+{
+	struct vnt_private *priv = tx_context->priv;
+	u16 rts_frame_len = 20;
+	u16 current_rate = tx_context->tx_rate;
+
+	vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
+		PK_TYPE_11B, &buf->b);
+	vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
+			  tx_context->pkt_type, &buf->a);
+
+	buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
+						      PK_TYPE_11B,
+						      priv->top_cck_basic_rate);
+	buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
+						      tx_context->pkt_type,
+						      current_rate);
+	buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
+						      tx_context->pkt_type,
+						      current_rate);
+
+	vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
+
+	return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
+}
+
+static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
+				  struct vnt_rts_g_fb *buf)
+{
+	struct vnt_private *priv = tx_context->priv;
+	u16 current_rate = tx_context->tx_rate;
+	u16 rts_frame_len = 20;
+
+	vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
+		PK_TYPE_11B, &buf->b);
+	vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
+			  tx_context->pkt_type, &buf->a);
+
+	buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
+						      PK_TYPE_11B,
+						      priv->top_cck_basic_rate);
+	buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
+						      tx_context->pkt_type,
+						      current_rate);
+	buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
+						      tx_context->pkt_type,
+						      current_rate);
+
+	buf->rts_duration_ba_f0 =
+		vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
+					   tx_context->pkt_type,
+					   priv->tx_rate_fb0);
+	buf->rts_duration_aa_f0 =
+		vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
+					   tx_context->pkt_type,
+					   priv->tx_rate_fb0);
+	buf->rts_duration_ba_f1 =
+		vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
+					   tx_context->pkt_type,
+					   priv->tx_rate_fb1);
+	buf->rts_duration_aa_f1 =
+		vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
+					   tx_context->pkt_type,
+					   priv->tx_rate_fb1);
+
+	vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
+
+	return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
+}
+
+static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
+				struct vnt_rts_ab *buf)
+{
+	struct vnt_private *priv = tx_context->priv;
+	u16 current_rate = tx_context->tx_rate;
+	u16 rts_frame_len = 20;
+
+	vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
+			  tx_context->pkt_type, &buf->ab);
+
+	buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
+						   tx_context->pkt_type,
+						   current_rate);
+
+	vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
+
+	return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
+}
+
+static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
+				  struct vnt_rts_a_fb *buf)
+{
+	struct vnt_private *priv = tx_context->priv;
+	u16 current_rate = tx_context->tx_rate;
+	u16 rts_frame_len = 20;
+
+	vnt_get_phy_field(priv, rts_frame_len,
+		priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a);
+
+	buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
+						   tx_context->pkt_type,
+						   current_rate);
+
+	buf->rts_duration_f0 =
+		vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
+					   tx_context->pkt_type,
+					   priv->tx_rate_fb0);
+
+	buf->rts_duration_f1 =
+		vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
+					   tx_context->pkt_type,
+					   priv->tx_rate_fb1);
+
+	vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
+
+	return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
+}
+
+static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
+				union vnt_tx_data_head *head)
+{
+	struct vnt_private *priv = tx_context->priv;
+	struct vnt_cts_fb *buf = &head->cts_g_fb;
+	u32 cts_frame_len = 14;
+	u16 current_rate = tx_context->tx_rate;
+
+	/* Get SignalField,ServiceField,Length */
+	vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
+			  PK_TYPE_11B, &buf->b);
+
+	buf->duration_ba =
+		vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
+					   tx_context->pkt_type,
+					   current_rate);
+	/* Get CTSDuration_ba_f0 */
+	buf->cts_duration_ba_f0 =
+		vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
+					   tx_context->pkt_type,
+					   priv->tx_rate_fb0);
+	/* Get CTSDuration_ba_f1 */
+	buf->cts_duration_ba_f1 =
+		vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
+					   tx_context->pkt_type,
+					   priv->tx_rate_fb1);
+	/* Get CTS Frame body */
+	buf->data.duration = buf->duration_ba;
+	buf->data.frame_control =
+		cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
+
+	ether_addr_copy(buf->data.ra, priv->current_net_addr);
+
+	return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
+}
+
+static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
+			     union vnt_tx_data_head *head)
+{
+	struct vnt_private *priv = tx_context->priv;
+	struct vnt_cts *buf = &head->cts_g;
+	u32 cts_frame_len = 14;
+	u16 current_rate = tx_context->tx_rate;
+
+	/* Get SignalField,ServiceField,Length */
+	vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
+			  PK_TYPE_11B, &buf->b);
+	/* Get CTSDuration_ba */
+	buf->duration_ba =
+		vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
+					   tx_context->pkt_type,
+					   current_rate);
+	/*Get CTS Frame body*/
+	buf->data.duration = buf->duration_ba;
+	buf->data.frame_control =
+		cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
+
+	ether_addr_copy(buf->data.ra, priv->current_net_addr);
+
+	return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
+}
+
+static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
+			union vnt_tx_head *tx_head, bool need_mic)
+{
+	struct vnt_private *priv = tx_context->priv;
+	struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
+	union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
+	u32 frame_len = tx_context->frame_len;
+	u16 current_rate = tx_context->tx_rate;
+	u8 need_ack = tx_context->need_ack;
+
+	buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
+			tx_context->pkt_type, frame_len, current_rate);
+	buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
+			tx_context->pkt_type, frame_len, current_rate);
+	buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
+			tx_context->pkt_type, frame_len, current_rate);
+
+	buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
+						frame_len, current_rate,
+						need_ack);
+	buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
+					priv->top_cck_basic_rate, need_ack);
+
+	if (need_mic)
+		head = &tx_head->tx_rts.tx.mic.head;
+
+	if (tx_context->fb_option)
+		return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
+
+	return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
+}
+
+static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
+			union vnt_tx_head *tx_head, bool need_mic)
+{
+	struct vnt_private *priv = tx_context->priv;
+	struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
+	union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
+	u32 frame_len = tx_context->frame_len;
+	u16 current_rate = tx_context->tx_rate;
+	u8 need_ack = tx_context->need_ack;
+
+	buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
+					frame_len, current_rate, need_ack);
+	buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
+				frame_len, priv->top_cck_basic_rate, need_ack);
+
+	buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
+			tx_context->pkt_type, frame_len, current_rate);
+
+	if (need_mic)
+		head = &tx_head->tx_cts.tx.mic.head;
+
+	/* Fill CTS */
+	if (tx_context->fb_option)
+		return vnt_fill_cts_fb_head(tx_context, head);
+
+	return vnt_fill_cts_head(tx_context, head);
+}
+
+static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
+		       union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
+{
+	struct vnt_private *priv = tx_context->priv;
+	struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
+	union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
+	u32 frame_len = tx_context->frame_len;
+	u16 current_rate = tx_context->tx_rate;
+	u8 need_ack = tx_context->need_ack;
+
+	buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
+			frame_len, current_rate, need_ack);
+
+	if (need_mic)
+		head = &tx_head->tx_ab.tx.mic.head;
+
+	if (need_rts) {
+		if (tx_context->pkt_type == PK_TYPE_11B)
+			buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
+				tx_context->pkt_type, frame_len, current_rate);
+		else /* PK_TYPE_11A */
+			buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
+				tx_context->pkt_type, frame_len, current_rate);
+
+		if (tx_context->fb_option &&
+		    tx_context->pkt_type == PK_TYPE_11A)
+			return vnt_rxtx_rts_a_fb_head(tx_context,
+						      &head->rts_a_fb);
+
+		return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
+	}
+
+	if (tx_context->pkt_type == PK_TYPE_11A)
+		return vnt_rxtx_datahead_a_fb(tx_context,
+					      &head->data_head_a_fb);
+
+	return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
+}
+
+static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
+	struct vnt_tx_buffer *tx_buffer,
+	struct vnt_mic_hdr **mic_hdr, u32 need_mic,
+	bool need_rts)
+{
+
+	if (tx_context->pkt_type == PK_TYPE_11GB ||
+	    tx_context->pkt_type == PK_TYPE_11GA) {
+		if (need_rts) {
+			if (need_mic)
+				*mic_hdr = &tx_buffer->
+						tx_head.tx_rts.tx.mic.hdr;
+
+			return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
+					    need_mic);
+		}
+
+		if (need_mic)
+			*mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
+
+		return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
+	}
+
+	if (need_mic)
+		*mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
+
+	return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
+}
+
+static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
+	u8 *key_buffer, struct ieee80211_key_conf *tx_key, struct sk_buff *skb,
+	u16 payload_len, struct vnt_mic_hdr *mic_hdr)
+{
+	struct ieee80211_hdr *hdr = tx_context->hdr;
+	struct ieee80211_key_seq seq;
+	u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
+
+	/* strip header and icv len from payload */
+	payload_len -= ieee80211_get_hdrlen_from_skb(skb);
+	payload_len -= tx_key->icv_len;
+
+	switch (tx_key->cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+		memcpy(key_buffer, iv, 3);
+		memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
+
+		if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
+			memcpy(key_buffer + 8, iv, 3);
+			memcpy(key_buffer + 11,
+					tx_key->key, WLAN_KEY_LEN_WEP40);
+		}
+
+		break;
+	case WLAN_CIPHER_SUITE_TKIP:
+		ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
+
+		break;
+	case WLAN_CIPHER_SUITE_CCMP:
+
+		if (!mic_hdr)
+			return;
+
+		mic_hdr->id = 0x59;
+		mic_hdr->payload_len = cpu_to_be16(payload_len);
+		ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
+
+		ieee80211_get_key_tx_seq(tx_key, &seq);
+
+		memcpy(mic_hdr->ccmp_pn, seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
+
+		if (ieee80211_has_a4(hdr->frame_control))
+			mic_hdr->hlen = cpu_to_be16(28);
+		else
+			mic_hdr->hlen = cpu_to_be16(22);
+
+		ether_addr_copy(mic_hdr->addr1, hdr->addr1);
+		ether_addr_copy(mic_hdr->addr2, hdr->addr2);
+		ether_addr_copy(mic_hdr->addr3, hdr->addr3);
+
+		mic_hdr->frame_control = cpu_to_le16(
+			le16_to_cpu(hdr->frame_control) & 0xc78f);
+		mic_hdr->seq_ctrl = cpu_to_le16(
+				le16_to_cpu(hdr->seq_ctrl) & 0xf);
+
+		if (ieee80211_has_a4(hdr->frame_control))
+			ether_addr_copy(mic_hdr->addr4, hdr->addr4);
+
+
+		memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
+
+		break;
+	default:
+		break;
+	}
+
+}
+
+int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
+	struct ieee80211_rate *rate;
+	struct ieee80211_key_conf *tx_key;
+	struct ieee80211_hdr *hdr;
+	struct vnt_mic_hdr *mic_hdr = NULL;
+	struct vnt_tx_buffer *tx_buffer;
+	struct vnt_tx_fifo_head *tx_buffer_head;
+	struct vnt_usb_send_context *tx_context;
+	unsigned long flags;
+	u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
+	u8 pkt_type, fb_option = AUTO_FB_NONE;
+	bool need_rts = false, is_pspoll = false;
+	bool need_mic = false;
+
+	hdr = (struct ieee80211_hdr *)(skb->data);
+
+	rate = ieee80211_get_tx_rate(priv->hw, info);
+
+	current_rate = rate->hw_value;
+	if (priv->current_rate != current_rate &&
+			!(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
+		priv->current_rate = current_rate;
+		vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
+	}
+
+	if (current_rate > RATE_11M) {
+		if (info->band == IEEE80211_BAND_5GHZ) {
+			pkt_type = PK_TYPE_11A;
+		} else {
+			if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
+				pkt_type = PK_TYPE_11GB;
+			else
+				pkt_type = PK_TYPE_11GA;
+		}
+	} else {
+		pkt_type = PK_TYPE_11B;
+	}
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	tx_context = vnt_get_free_context(priv);
+	if (!tx_context) {
+		dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return -ENOMEM;
+	}
+
+	tx_context->skb = skb;
+	tx_context->pkt_type = pkt_type;
+	tx_context->need_ack = false;
+	tx_context->frame_len = skb->len + 4;
+	tx_context->tx_rate = current_rate;
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
+	tx_buffer_head = &tx_buffer->fifo_head;
+	tx_body_size = skb->len;
+
+	/*Set fifo controls */
+	if (pkt_type == PK_TYPE_11A)
+		tx_buffer_head->fifo_ctl = 0;
+	else if (pkt_type == PK_TYPE_11B)
+		tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
+	else if (pkt_type == PK_TYPE_11GB)
+		tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
+	else if (pkt_type == PK_TYPE_11GA)
+		tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
+
+	if (!ieee80211_is_data(hdr->frame_control)) {
+		tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
+							FIFOCTL_ISDMA0);
+		tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
+
+		tx_buffer_head->time_stamp =
+			cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
+	} else {
+		tx_buffer_head->time_stamp =
+			cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
+	}
+
+	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
+		tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
+		tx_context->need_ack = true;
+	}
+
+	if (ieee80211_has_retry(hdr->frame_control))
+		tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
+
+	if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
+		priv->preamble_type = PREAMBLE_SHORT;
+	else
+		priv->preamble_type = PREAMBLE_LONG;
+
+	if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
+		need_rts = true;
+		tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
+	}
+
+	if (ieee80211_has_a4(hdr->frame_control))
+		tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
+
+	if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
+		is_pspoll = true;
+
+	tx_buffer_head->frag_ctl =
+			cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
+
+	if (info->control.hw_key) {
+		tx_key = info->control.hw_key;
+		switch (info->control.hw_key->cipher) {
+		case WLAN_CIPHER_SUITE_WEP40:
+		case WLAN_CIPHER_SUITE_WEP104:
+			tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
+			break;
+		case WLAN_CIPHER_SUITE_TKIP:
+			tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
+			break;
+		case WLAN_CIPHER_SUITE_CCMP:
+			tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
+			need_mic = true;
+		default:
+			break;
+		}
+		tx_context->frame_len += tx_key->icv_len;
+	}
+
+	tx_buffer_head->current_rate = cpu_to_le16(current_rate);
+
+	/* legacy rates TODO use ieee80211_tx_rate */
+	if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
+		if (priv->auto_fb_ctrl == AUTO_FB_0) {
+			tx_buffer_head->fifo_ctl |=
+						cpu_to_le16(FIFOCTL_AUTO_FB_0);
+
+			priv->tx_rate_fb0 =
+				vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
+			priv->tx_rate_fb1 =
+				vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
+
+			fb_option = AUTO_FB_0;
+		} else if (priv->auto_fb_ctrl == AUTO_FB_1) {
+			tx_buffer_head->fifo_ctl |=
+						cpu_to_le16(FIFOCTL_AUTO_FB_1);
+
+			priv->tx_rate_fb0 =
+				vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
+			priv->tx_rate_fb1 =
+				vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
+
+			fb_option = AUTO_FB_1;
+		}
+	}
+
+	tx_context->fb_option = fb_option;
+
+	duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
+						need_mic, need_rts);
+
+	tx_header_size = tx_context->tx_hdr_size;
+	if (!tx_header_size) {
+		tx_context->in_use = false;
+		return -ENOMEM;
+	}
+
+	tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
+
+	tx_bytes = tx_header_size + tx_body_size;
+
+	memcpy(tx_context->hdr, skb->data, tx_body_size);
+
+	hdr->duration_id = cpu_to_le16(duration_id);
+
+	if (info->control.hw_key) {
+		tx_key = info->control.hw_key;
+		if (tx_key->keylen > 0)
+			vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
+				tx_key, skb, tx_body_size, mic_hdr);
+	}
+
+	priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
+						IEEE80211_SCTL_SEQ) >> 4;
+
+	tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
+	tx_buffer->pkt_no = tx_context->pkt_no;
+	tx_buffer->type = 0x00;
+
+	tx_bytes += 4;
+
+	tx_context->type = CONTEXT_DATA_PACKET;
+	tx_context->buf_len = tx_bytes;
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return -EIO;
+	}
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static int vnt_beacon_xmit(struct vnt_private *priv,
+	struct sk_buff *skb)
+{
+	struct vnt_beacon_buffer *beacon_buffer;
+	struct vnt_tx_short_buf_head *short_head;
+	struct ieee80211_tx_info *info;
+	struct vnt_usb_send_context *context;
+	struct ieee80211_mgmt *mgmt_hdr;
+	unsigned long flags;
+	u32 frame_size = skb->len + 4;
+	u16 current_rate, count;
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	context = vnt_get_free_context(priv);
+	if (!context) {
+		dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return -ENOMEM;
+	}
+
+	context->skb = skb;
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
+	short_head = &beacon_buffer->short_head;
+
+	if (priv->bb_type == BB_TYPE_11A) {
+		current_rate = RATE_6M;
+
+		/* Get SignalField,ServiceField,Length */
+		vnt_get_phy_field(priv, frame_size, current_rate,
+			PK_TYPE_11A, &short_head->ab);
+
+		/* Get Duration and TimeStampOff */
+		short_head->duration = vnt_get_duration_le(priv,
+							PK_TYPE_11A, false);
+		short_head->time_stamp_off =
+				vnt_time_stamp_off(priv, current_rate);
+	} else {
+		current_rate = RATE_1M;
+		short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
+
+		/* Get SignalField,ServiceField,Length */
+		vnt_get_phy_field(priv, frame_size, current_rate,
+					PK_TYPE_11B, &short_head->ab);
+
+		/* Get Duration and TimeStampOff */
+		short_head->duration = vnt_get_duration_le(priv,
+						PK_TYPE_11B, false);
+		short_head->time_stamp_off =
+			vnt_time_stamp_off(priv, current_rate);
+	}
+
+	/* Generate Beacon Header */
+	mgmt_hdr = &beacon_buffer->mgmt_hdr;
+	memcpy(mgmt_hdr, skb->data, skb->len);
+
+	/* time stamp always 0 */
+	mgmt_hdr->u.beacon.timestamp = 0;
+
+	info = IEEE80211_SKB_CB(skb);
+	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
+		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
+
+		hdr->duration_id = 0;
+		hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
+	}
+
+	priv->seq_counter++;
+	if (priv->seq_counter > 0x0fff)
+		priv->seq_counter = 0;
+
+	count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
+
+	beacon_buffer->tx_byte_count = cpu_to_le16(count);
+	beacon_buffer->pkt_no = context->pkt_no;
+	beacon_buffer->type = 0x01;
+
+	context->type = CONTEXT_BEACON_PACKET;
+	context->buf_len = count + 4; /* USB header */
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	if (vnt_tx_context(priv, context) != STATUS_PENDING)
+		ieee80211_free_txskb(priv->hw, context->skb);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
+{
+	struct sk_buff *beacon;
+
+	beacon = ieee80211_beacon_get(priv->hw, vif);
+	if (!beacon)
+		return -ENOMEM;
+
+	if (vnt_beacon_xmit(priv, beacon)) {
+		ieee80211_free_txskb(priv->hw, beacon);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
+	struct ieee80211_bss_conf *conf)
+{
+	vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
+
+	vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
+
+	vnt_mac_set_beacon_interval(priv, conf->beacon_int);
+
+	vnt_clear_current_tsf(priv);
+
+	vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
+
+	vnt_reset_next_tbtt(priv, conf->beacon_int);
+
+	return vnt_beacon_make(priv, vif);
+}