Staging: add rt2870 wireless driver

This is the Ralink RT2870 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, 144 insertions, 0 deletions

diff --git a/drivers/staging/rt2870/common/netif_block.c b/drivers/staging/rt2870/common/netif_block.c
new file mode 100644
index 00000000000..d3f7d087e7f
--- /dev/null
+++ b/drivers/staging/rt2870/common/netif_block.c
@@ -0,0 +1,144 @@
+/*
+ *************************************************************************
+ * 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.             *
+ *                                                                       *
+ *************************************************************************
+ */
+
+#include "../rt_config.h"
+#include "netif_block.h"
+
+static NETIF_ENTRY freeNetIfEntryPool[FREE_NETIF_POOL_SIZE];
+static LIST_HEADER freeNetIfEntryList;
+
+void initblockQueueTab(
+	IN PRTMP_ADAPTER pAd)
+{
+	int i;
+
+	initList(&freeNetIfEntryList);
+	for (i = 0; i < FREE_NETIF_POOL_SIZE; i++)
+		insertTailList(&freeNetIfEntryList, (PLIST_ENTRY)&freeNetIfEntryPool[i]);
+
+	for (i=0; i < NUM_OF_TX_RING; i++)
+		initList(&pAd->blockQueueTab[i].NetIfList);
+
+	return;
+}
+
+BOOLEAN blockNetIf(
+	IN PBLOCK_QUEUE_ENTRY pBlockQueueEntry,
+	IN PNET_DEV pNetDev)
+{
+	PNETIF_ENTRY pNetIfEntry = NULL;
+
+	if ((pNetIfEntry = (PNETIF_ENTRY)removeHeadList(&freeNetIfEntryList)) != NULL)
+	{
+		netif_stop_queue(pNetDev);
+		pNetIfEntry->pNetDev = pNetDev;
+		insertTailList(&pBlockQueueEntry->NetIfList, (PLIST_ENTRY)pNetIfEntry);
+
+		pBlockQueueEntry->SwTxQueueBlockFlag = TRUE;
+		DBGPRINT(RT_DEBUG_TRACE, ("netif_stop_queue(%s)\n", pNetDev->name));
+	}
+	else
+		return FALSE;
+
+	return TRUE;
+}
+
+VOID releaseNetIf(
+	IN PBLOCK_QUEUE_ENTRY pBlockQueueEntry)
+{
+	PNETIF_ENTRY pNetIfEntry = NULL;
+	PLIST_HEADER pNetIfList = &pBlockQueueEntry->NetIfList;
+
+	while((pNetIfEntry = (PNETIF_ENTRY)removeHeadList(pNetIfList)) !=  NULL)
+	{
+		PNET_DEV pNetDev = pNetIfEntry->pNetDev;
+		netif_wake_queue(pNetDev);
+		insertTailList(&freeNetIfEntryList, (PLIST_ENTRY)pNetIfEntry);
+
+		DBGPRINT(RT_DEBUG_TRACE, ("netif_wake_queue(%s)\n", pNetDev->name));
+	}
+	pBlockQueueEntry->SwTxQueueBlockFlag = FALSE;
+	return;
+}
+
+
+VOID StopNetIfQueue(
+	IN PRTMP_ADAPTER pAd,
+	IN UCHAR QueIdx,
+	IN PNDIS_PACKET pPacket)
+{
+	PNET_DEV NetDev = NULL;
+	UCHAR IfIdx = 0;
+	BOOLEAN valid = FALSE;
+
+#ifdef APCLI_SUPPORT
+	if (RTMP_GET_PACKET_NET_DEVICE(pPacket) >= MIN_NET_DEVICE_FOR_APCLI)
+	{
+		IfIdx = (RTMP_GET_PACKET_NET_DEVICE(pPacket) - MIN_NET_DEVICE_FOR_APCLI) % MAX_APCLI_NUM;
+		NetDev = pAd->ApCfg.ApCliTab[IfIdx].dev;
+	}
+	else
+#endif // APCLI_SUPPORT //
+#ifdef WDS_SUPPORT
+	if (RTMP_GET_PACKET_NET_DEVICE(pPacket) >= MIN_NET_DEVICE_FOR_WDS)
+	{
+		IfIdx = (RTMP_GET_PACKET_NET_DEVICE(pPacket) - MIN_NET_DEVICE_FOR_WDS) % MAX_WDS_ENTRY;
+		NetDev = pAd->WdsTab.WdsEntry[IfIdx].dev;
+	}
+	else
+#endif // WDS_SUPPORT //
+	{
+#ifdef MBSS_SUPPORT
+		if (pAd->OpMode == OPMODE_AP)
+		{
+			IfIdx = (RTMP_GET_PACKET_NET_DEVICE(pPacket) - MIN_NET_DEVICE_FOR_MBSSID) % MAX_MBSSID_NUM;
+			NetDev = pAd->ApCfg.MBSSID[IfIdx].MSSIDDev;
+		}
+		else
+		{
+			IfIdx = MAIN_MBSSID;
+			NetDev = pAd->net_dev;
+		}
+#else
+		IfIdx = MAIN_MBSSID;
+		NetDev = pAd->net_dev;
+#endif
+	}
+
+	// WMM support 4 software queues.
+	// One software queue full doesn't mean device have no capbility to transmit packet.
+	// So disable block Net-If queue function while WMM enable.
+#ifdef CONFIG_STA_SUPPORT
+	IF_DEV_CONFIG_OPMODE_ON_STA(pAd)
+		valid = (pAd->CommonCfg.bWmmCapable == TRUE) ? FALSE : TRUE;
+#endif // CONFIG_STA_SUPPORT //
+
+	if (valid)
+		blockNetIf(&pAd->blockQueueTab[QueIdx], NetDev);
+	return;
+}
+