Staging: add rt2860 wireless driver

This is the Ralink RT2860 driver from the company that does horrible
things like reading a config file from /etc.  However, the driver that
is currently under development from the wireless development community
is not working at all yet, so distros and users are using this version
instead (quite common hardware on a lot of netbook machines).

So here is this driver, for now, until the wireless developers get a
"clean" version into the main tree, or until this version is cleaned up
sufficiently to move out of the staging tree.

Ported to the Linux build system and cleaned up a bit already by me.

Cc: Linux wireless <linux-wireless@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 453 insertions, 0 deletions

diff --git a/drivers/staging/rt2860/common/dfs.c b/drivers/staging/rt2860/common/dfs.c
new file mode 100644
index 000000000000..23cf1510e2d2
--- /dev/null
+++ b/drivers/staging/rt2860/common/dfs.c
@@ -0,0 +1,453 @@
+/*
+ *************************************************************************
+ * Ralink Tech Inc.
+ * 5F., No.36, Taiyuan St., Jhubei City,
+ * Hsinchu County 302,
+ * Taiwan, R.O.C.
+ *
+ * (c) Copyright 2002-2007, Ralink Technology, Inc.
+ *
+ * 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.,                                       *
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ *                                                                       *
+ *************************************************************************
+
+    Module Name:
+    ap_dfs.c
+
+    Abstract:
+    Support DFS function.
+
+    Revision History:
+    Who       When            What
+    --------  ----------      ----------------------------------------------
+    Fonchi    03-12-2007      created
+*/
+
+#include "../rt_config.h"
+
+typedef struct _RADAR_DURATION_TABLE
+{
+	ULONG RDDurRegion;
+	ULONG RadarSignalDuration;
+	ULONG Tolerance;
+} RADAR_DURATION_TABLE, *PRADAR_DURATION_TABLE;
+
+
+static UCHAR RdIdleTimeTable[MAX_RD_REGION][4] =
+{
+	{9, 250, 250, 250},		// CE
+	{4, 250, 250, 250},		// FCC
+	{4, 250, 250, 250},		// JAP
+	{15, 250, 250, 250},	// JAP_W53
+	{4, 250, 250, 250}		// JAP_W56
+};
+
+/*
+	========================================================================
+
+	Routine Description:
+		Bbp Radar detection routine
+
+	Arguments:
+		pAd 	Pointer to our adapter
+
+	Return Value:
+
+	========================================================================
+*/
+VOID BbpRadarDetectionStart(
+	IN PRTMP_ADAPTER pAd)
+{
+	UINT8 RadarPeriod;
+
+	RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 114, 0x02);
+	RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 121, 0x20);
+	RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 122, 0x00);
+	RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 123, 0x08/*0x80*/);
+	RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 124, 0x28);
+	RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, 125, 0xff);
+
+#if 0
+	// toggle Rx enable bit for radar detection.
+	// it's Andy's recommand.
+	{
+		UINT32 Value;
+	RTMP_IO_READ32(pAd, MAC_SYS_CTRL, &Value);
+	Value |= (0x1 << 3);
+	RTMP_IO_WRITE32(pAd, MAC_SYS_CTRL, Value);
+	Value &= ~(0x1 << 3);
+	RTMP_IO_WRITE32(pAd, MAC_SYS_CTRL, Value);
+	}
+#endif
+	RadarPeriod = ((UINT)RdIdleTimeTable[pAd->CommonCfg.RadarDetect.RDDurRegion][0] + (UINT)pAd->CommonCfg.RadarDetect.DfsSessionTime) < 250 ?
+			(RdIdleTimeTable[pAd->CommonCfg.RadarDetect.RDDurRegion][0] + pAd->CommonCfg.RadarDetect.DfsSessionTime) : 250;
+
+	RTMP_IO_WRITE8(pAd, 0x7020, 0x1d);
+	RTMP_IO_WRITE8(pAd, 0x7021, 0x40);
+
+	RadarDetectionStart(pAd, 0, RadarPeriod);
+	return;
+}
+
+/*
+	========================================================================
+
+	Routine Description:
+		Bbp Radar detection routine
+
+	Arguments:
+		pAd 	Pointer to our adapter
+
+	Return Value:
+
+	========================================================================
+*/
+VOID BbpRadarDetectionStop(
+	IN PRTMP_ADAPTER pAd)
+{
+	RTMP_IO_WRITE8(pAd, 0x7020, 0x1d);
+	RTMP_IO_WRITE8(pAd, 0x7021, 0x60);
+
+	RadarDetectionStop(pAd);
+	return;
+}
+
+/*
+	========================================================================
+
+	Routine Description:
+		Radar detection routine
+
+	Arguments:
+		pAd 	Pointer to our adapter
+
+	Return Value:
+
+	========================================================================
+*/
+VOID RadarDetectionStart(
+	IN PRTMP_ADAPTER pAd,
+	IN BOOLEAN CTSProtect,
+	IN UINT8 CTSPeriod)
+{
+	UINT8 DfsActiveTime = (pAd->CommonCfg.RadarDetect.DfsSessionTime & 0x1f);
+	UINT8 CtsProtect = (CTSProtect == 1) ? 0x02 : 0x01; // CTS protect.
+
+	if (CTSProtect != 0)
+	{
+		switch(pAd->CommonCfg.RadarDetect.RDDurRegion)
+		{
+		case FCC:
+		case JAP_W56:
+			CtsProtect = 0x03;
+			break;
+
+		case CE:
+		case JAP_W53:
+		default:
+			CtsProtect = 0x02;
+			break;
+		}
+	}
+	else
+		CtsProtect = 0x01;
+
+
+	// send start-RD with CTS protection command to MCU
+	// highbyte [7]		reserve
+	// highbyte [6:5]	0x: stop Carrier/Radar detection
+	// highbyte [10]:	Start Carrier/Radar detection without CTS protection, 11: Start Carrier/Radar detection with CTS protection
+	// highbyte [4:0]	Radar/carrier detection duration. In 1ms.
+
+	// lowbyte [7:0]	Radar/carrier detection period, in 1ms.
+	AsicSendCommandToMcu(pAd, 0x60, 0xff, CTSPeriod, DfsActiveTime | (CtsProtect << 5));
+	//AsicSendCommandToMcu(pAd, 0x63, 0xff, 10, 0);
+
+	return;
+}
+
+/*
+	========================================================================
+
+	Routine Description:
+		Radar detection routine
+
+	Arguments:
+		pAd 	Pointer to our adapter
+
+	Return Value:
+		TRUE	Found radar signal
+		FALSE	Not found radar signal
+
+	========================================================================
+*/
+VOID RadarDetectionStop(
+	IN PRTMP_ADAPTER	pAd)
+{
+	DBGPRINT(RT_DEBUG_TRACE,("RadarDetectionStop.\n"));
+	AsicSendCommandToMcu(pAd, 0x60, 0xff, 0x00, 0x00);	// send start-RD with CTS protection command to MCU
+
+	return;
+}
+
+/*
+	========================================================================
+
+	Routine Description:
+		Radar channel check routine
+
+	Arguments:
+		pAd 	Pointer to our adapter
+
+	Return Value:
+		TRUE	need to do radar detect
+		FALSE	need not to do radar detect
+
+	========================================================================
+*/
+BOOLEAN RadarChannelCheck(
+	IN PRTMP_ADAPTER	pAd,
+	IN UCHAR			Ch)
+{
+#if 1
+	INT		i;
+	BOOLEAN result = FALSE;
+
+	for (i=0; i<pAd->ChannelListNum; i++)
+	{
+		if (Ch == pAd->ChannelList[i].Channel)
+		{
+			result = pAd->ChannelList[i].DfsReq;
+			break;
+		}
+	}
+
+	return result;
+#else
+	INT		i;
+	UCHAR	Channel[15]={52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140};
+
+	for (i=0; i<15; i++)
+	{
+		if (Ch == Channel[i])
+		{
+			break;
+		}
+	}
+
+	if (i != 15)
+		return TRUE;
+	else
+		return FALSE;
+#endif
+}
+
+ULONG JapRadarType(
+	IN PRTMP_ADAPTER pAd)
+{
+	ULONG		i;
+	const UCHAR	Channel[15]={52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140};
+
+	if (pAd->CommonCfg.RadarDetect.RDDurRegion != JAP)
+	{
+		return pAd->CommonCfg.RadarDetect.RDDurRegion;
+	}
+
+	for (i=0; i<15; i++)
+	{
+		if (pAd->CommonCfg.Channel == Channel[i])
+		{
+			break;
+		}
+	}
+
+	if (i < 4)
+		return JAP_W53;
+	else if (i < 15)
+		return JAP_W56;
+	else
+		return JAP; // W52
+
+}
+
+ULONG RTMPBbpReadRadarDuration(
+	IN PRTMP_ADAPTER	pAd)
+{
+	UINT8 byteValue = 0;
+	ULONG result;
+
+	BBP_IO_READ8_BY_REG_ID(pAd, BBP_R115, &byteValue);
+
+	result = 0;
+	switch (byteValue)
+	{
+	case 1: // radar signal detected by pulse mode.
+	case 2: // radar signal detected by width mode.
+		result = RTMPReadRadarDuration(pAd);
+		break;
+
+	case 0: // No radar signal.
+	default:
+
+		result = 0;
+		break;
+	}
+
+	return result;
+}
+
+ULONG RTMPReadRadarDuration(
+	IN PRTMP_ADAPTER	pAd)
+{
+	ULONG result = 0;
+
+#ifdef DFS_SUPPORT
+	UINT8 duration1 = 0, duration2 = 0, duration3 = 0;
+
+	BBP_IO_READ8_BY_REG_ID(pAd, BBP_R116, &duration1);
+	BBP_IO_READ8_BY_REG_ID(pAd, BBP_R117, &duration2);
+	BBP_IO_READ8_BY_REG_ID(pAd, BBP_R118, &duration3);
+	result = (duration1 << 16) + (duration2 << 8) + duration3;
+#endif // DFS_SUPPORT //
+
+	return result;
+
+}
+
+VOID RTMPCleanRadarDuration(
+	IN PRTMP_ADAPTER	pAd)
+{
+	return;
+}
+
+/*
+    ========================================================================
+    Routine Description:
+        Radar wave detection. The API should be invoke each second.
+
+    Arguments:
+        pAd         - Adapter pointer
+
+    Return Value:
+        None
+
+    ========================================================================
+*/
+VOID ApRadarDetectPeriodic(
+	IN PRTMP_ADAPTER pAd)
+{
+	INT	i;
+
+	pAd->CommonCfg.RadarDetect.InServiceMonitorCount++;
+
+	for (i=0; i<pAd->ChannelListNum; i++)
+	{
+		if (pAd->ChannelList[i].RemainingTimeForUse > 0)
+		{
+			pAd->ChannelList[i].RemainingTimeForUse --;
+			if ((pAd->Mlme.PeriodicRound%5) == 0)
+			{
+				DBGPRINT(RT_DEBUG_TRACE, ("RadarDetectPeriodic - ch=%d, RemainingTimeForUse=%d\n", pAd->ChannelList[i].Channel, pAd->ChannelList[i].RemainingTimeForUse));
+			}
+		}
+	}
+
+	//radar detect
+	if ((pAd->CommonCfg.Channel > 14)
+		&& (pAd->CommonCfg.bIEEE80211H == 1)
+		&& RadarChannelCheck(pAd, pAd->CommonCfg.Channel))
+	{
+		RadarDetectPeriodic(pAd);
+	}
+
+	return;
+}
+
+// Periodic Radar detection, switch channel will occur in RTMPHandleTBTTInterrupt()
+// Before switch channel, driver needs doing channel switch announcement.
+VOID RadarDetectPeriodic(
+	IN PRTMP_ADAPTER	pAd)
+{
+	// need to check channel availability, after switch channel
+	if (pAd->CommonCfg.RadarDetect.RDMode != RD_SILENCE_MODE)
+			return;
+
+	// channel availability check time is 60sec, use 65 for assurance
+	if (pAd->CommonCfg.RadarDetect.RDCount++ > pAd->CommonCfg.RadarDetect.ChMovingTime)
+	{
+		DBGPRINT(RT_DEBUG_TRACE, ("Not found radar signal, start send beacon and radar detection in service monitor\n\n"));
+			BbpRadarDetectionStop(pAd);
+		AsicEnableBssSync(pAd);
+		pAd->CommonCfg.RadarDetect.RDMode = RD_NORMAL_MODE;
+
+
+		return;
+	}
+
+	return;
+}
+
+
+/*
+    ==========================================================================
+    Description:
+		change channel moving time for DFS testing.
+
+	Arguments:
+	    pAdapter                    Pointer to our adapter
+	    wrq                         Pointer to the ioctl argument
+
+    Return Value:
+        None
+
+    Note:
+        Usage:
+               1.) iwpriv ra0 set ChMovTime=[value]
+    ==========================================================================
+*/
+INT Set_ChMovingTime_Proc(
+	IN PRTMP_ADAPTER pAd,
+	IN PUCHAR arg)
+{
+	UINT8 Value;
+
+	Value = simple_strtol(arg, 0, 10);
+
+	pAd->CommonCfg.RadarDetect.ChMovingTime = Value;
+
+	DBGPRINT(RT_DEBUG_TRACE, ("%s:: %d\n", __FUNCTION__,
+		pAd->CommonCfg.RadarDetect.ChMovingTime));
+
+	return TRUE;
+}
+
+INT Set_LongPulseRadarTh_Proc(
+	IN PRTMP_ADAPTER pAd,
+	IN PUCHAR arg)
+{
+	UINT8 Value;
+
+	Value = simple_strtol(arg, 0, 10) > 10 ? 10 : simple_strtol(arg, 0, 10);
+
+	pAd->CommonCfg.RadarDetect.LongPulseRadarTh = Value;
+
+	DBGPRINT(RT_DEBUG_TRACE, ("%s:: %d\n", __FUNCTION__,
+		pAd->CommonCfg.RadarDetect.LongPulseRadarTh));
+
+	return TRUE;
+}
+
+