Initial import

1 files changed, 166 insertions, 0 deletions

diff --git a/drivers/staging/vt6656/int.c b/drivers/staging/vt6656/int.c
new file mode 100644
index 000000000..2ef70e470
--- /dev/null
+++ b/drivers/staging/vt6656/int.c
@@ -0,0 +1,166 @@
+/*
+ * 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: int.c
+ *
+ * Purpose: Handle USB interrupt endpoint
+ *
+ * Author: Jerry Chen
+ *
+ * Date: Apr. 2, 2004
+ *
+ * Functions:
+ *
+ * Revision History:
+ *      04-02-2004 Jerry Chen:  Initial release
+ *
+ */
+
+#include "int.h"
+#include "mac.h"
+#include "power.h"
+#include "usbpipe.h"
+
+static const u8 fallback_rate0[5][5] = {
+	{RATE_18M, RATE_18M, RATE_12M, RATE_12M, RATE_12M},
+	{RATE_24M, RATE_24M, RATE_18M, RATE_12M, RATE_12M},
+	{RATE_36M, RATE_36M, RATE_24M, RATE_18M, RATE_18M},
+	{RATE_48M, RATE_48M, RATE_36M, RATE_24M, RATE_24M},
+	{RATE_54M, RATE_54M, RATE_48M, RATE_36M, RATE_36M}
+};
+
+static const u8 fallback_rate1[5][5] = {
+	{RATE_18M, RATE_18M, RATE_12M, RATE_6M, RATE_6M},
+	{RATE_24M, RATE_24M, RATE_18M, RATE_6M, RATE_6M},
+	{RATE_36M, RATE_36M, RATE_24M, RATE_12M, RATE_12M},
+	{RATE_48M, RATE_48M, RATE_24M, RATE_12M, RATE_12M},
+	{RATE_54M, RATE_54M, RATE_36M, RATE_18M, RATE_18M}
+};
+
+void vnt_int_start_interrupt(struct vnt_private *priv)
+{
+	unsigned long flags;
+	int status;
+
+	dev_dbg(&priv->usb->dev, "---->Interrupt Polling Thread\n");
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	status = vnt_start_interrupt_urb(priv);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int vnt_int_report_rate(struct vnt_private *priv, u8 pkt_no, u8 tsr)
+{
+	struct vnt_usb_send_context *context;
+	struct ieee80211_tx_info *info;
+	struct ieee80211_rate *rate;
+	u8 tx_retry = (tsr & 0xf0) >> 4;
+	s8 idx;
+
+	if (pkt_no >= priv->num_tx_context)
+		return -EINVAL;
+
+	context = priv->tx_context[pkt_no];
+
+	if (!context->skb)
+		return -EINVAL;
+
+	info = IEEE80211_SKB_CB(context->skb);
+	idx = info->control.rates[0].idx;
+
+	if (context->fb_option && !(tsr & (TSR_TMO | TSR_RETRYTMO))) {
+		u8 tx_rate;
+		u8 retry = tx_retry;
+
+		rate = ieee80211_get_tx_rate(priv->hw, info);
+		tx_rate = rate->hw_value - RATE_18M;
+
+		if (retry > 4)
+			retry = 4;
+
+		if (context->fb_option == AUTO_FB_0)
+			tx_rate = fallback_rate0[tx_rate][retry];
+		else if (context->fb_option == AUTO_FB_1)
+			tx_rate = fallback_rate1[tx_rate][retry];
+
+		if (info->band == IEEE80211_BAND_5GHZ)
+			idx = tx_rate - RATE_6M;
+		else
+			idx = tx_rate;
+	}
+
+	ieee80211_tx_info_clear_status(info);
+
+	info->status.rates[0].count = tx_retry;
+
+	if (!(tsr & (TSR_TMO | TSR_RETRYTMO))) {
+		info->status.rates[0].idx = idx;
+		info->flags |= IEEE80211_TX_STAT_ACK;
+	}
+
+	ieee80211_tx_status_irqsafe(priv->hw, context->skb);
+
+	context->in_use = false;
+
+	return 0;
+}
+
+void vnt_int_process_data(struct vnt_private *priv)
+{
+	struct vnt_interrupt_data *int_data;
+	struct ieee80211_low_level_stats *low_stats = &priv->low_stats;
+
+	dev_dbg(&priv->usb->dev, "---->s_nsInterruptProcessData\n");
+
+	int_data = (struct vnt_interrupt_data *)priv->int_buf.data_buf;
+
+	if (int_data->tsr0 & TSR_VALID)
+		vnt_int_report_rate(priv, int_data->pkt0, int_data->tsr0);
+
+	if (int_data->tsr1 & TSR_VALID)
+		vnt_int_report_rate(priv, int_data->pkt1, int_data->tsr1);
+
+	if (int_data->tsr2 & TSR_VALID)
+		vnt_int_report_rate(priv, int_data->pkt2, int_data->tsr2);
+
+	if (int_data->tsr3 & TSR_VALID)
+		vnt_int_report_rate(priv, int_data->pkt3, int_data->tsr3);
+
+	if (int_data->isr0 != 0) {
+		if (int_data->isr0 & ISR_BNTX &&
+				priv->op_mode == NL80211_IFTYPE_AP)
+			vnt_schedule_command(priv, WLAN_CMD_BECON_SEND);
+
+		if (int_data->isr0 & ISR_TBTT) {
+			if (priv->hw->conf.flags & IEEE80211_CONF_PS)
+				vnt_schedule_command(priv,
+							WLAN_CMD_TBTT_WAKEUP);
+		}
+		priv->current_tsf = le64_to_cpu(int_data->tsf);
+
+		low_stats->dot11RTSSuccessCount += int_data->rts_success;
+		low_stats->dot11RTSFailureCount += int_data->rts_fail;
+		low_stats->dot11ACKFailureCount += int_data->ack_fail;
+		low_stats->dot11FCSErrorCount += int_data->fcs_err;
+	}
+
+	priv->int_buf.in_use = false;
+}