Staging: add rt3090 wireless driver

This is the vendor driver for the Ralink RT3090 chipset.

It should be later cleaned and ported to use the existing rt2x00
infrastructure or just replaced by the proper version.

[ Unfortunately since it follows the same design/implementation like
  rt{286,287,307}0 drivers (already present in the staging tree)
  it is highly unlikely that it will see much love from the wireless
  development community.. ]

However since the development of the cleaner/proper version can take
significant time lets give distros (i.e. openSUSE seems to already
have the package with the original vendor driver) and users "something"
to use in the meantime.

I forward ported it to 2.6.31-rc1, ported to the Linux build system
and did some initial cleanups.  More fixes/cleanups to come later
(it seems that the driver can be made to share most of its code with
the other Ralink drivers already present in the staging tree).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 215 insertions, 0 deletions

diff --git a/drivers/staging/rt3090/common/mlme_ex.c b/drivers/staging/rt3090/common/mlme_ex.c
new file mode 100644
index 0000000..d7fb7f5
--- /dev/null
+++ b/drivers/staging/rt3090/common/mlme_ex.c
@@ -0,0 +1,215 @@
+/*
+ *************************************************************************
+ * 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:
+	mlme_ex.c
+
+	Abstract:
+	Miniport generic portion header file
+
+	Revision History:
+	Who         When          What
+	--------    ----------    ----------------------------------------------
+	Fonchi		2007-06-25		Extend original mlme APIs to support multi-entries
+*/
+
+#include "../rt_config.h"
+#include "../mlme_ex_def.h"
+//#include <stdarg.h>
+
+
+// ===========================================================================================
+// state_machine
+// ===========================================================================================
+
+/*! \brief Initialize the state machine.
+ *  \param *S           pointer to the state machine
+ *  \param  Trans       State machine transition function
+ *  \param  StNr        number of states
+ *  \param  MsgNr       number of messages
+ *  \param  DefFunc     default function, when there is invalid state/message combination
+ *  \param  InitState   initial state of the state machine
+ *  \param  Base        StateMachine base, internal use only
+ *  \pre p_sm should be a legal pointer
+ *  \post
+ */
+VOID StateMachineInitEx(
+	IN STATE_MACHINE_EX *S,
+	IN STATE_MACHINE_FUNC_EX Trans[],
+	IN ULONG StNr,
+	IN ULONG MsgNr,
+	IN STATE_MACHINE_FUNC_EX DefFunc,
+	IN ULONG InitState,
+	IN ULONG Base)
+{
+	ULONG i, j;
+
+	// set number of states and messages
+	S->NrState = StNr;
+	S->NrMsg   = MsgNr;
+	S->Base    = Base;
+
+	S->TransFunc  = Trans;
+
+	// init all state transition to default function
+	for (i = 0; i < StNr; i++)
+	{
+		for (j = 0; j < MsgNr; j++)
+		{
+			S->TransFunc[i * MsgNr + j] = DefFunc;
+		}
+	}
+
+	// set the starting state
+	S->CurrState = InitState;
+
+	return;
+}
+
+/*! \brief This function fills in the function pointer into the cell in the state machine
+ *  \param *S   pointer to the state machine
+ *  \param St   state
+ *  \param Msg  incoming message
+ *  \param f    the function to be executed when (state, message) combination occurs at the state machine
+ *  \pre *S should be a legal pointer to the state machine, st, msg, should be all within the range, Base should be set in the initial state
+ *  \post
+ */
+VOID StateMachineSetActionEx(
+	IN STATE_MACHINE_EX *S,
+	IN ULONG St,
+	IN ULONG Msg,
+	IN STATE_MACHINE_FUNC_EX Func)
+{
+	ULONG MsgIdx;
+
+	MsgIdx = Msg - S->Base;
+
+	if (St < S->NrState && MsgIdx < S->NrMsg)
+	{
+		// boundary checking before setting the action
+		S->TransFunc[St * S->NrMsg + MsgIdx] = Func;
+	}
+
+	return;
+}
+
+/*! \brief   This function does the state transition
+ *  \param   *Adapter the NIC adapter pointer
+ *  \param   *S       the state machine
+ *  \param   *Elem    the message to be executed
+ *  \return   None
+ */
+VOID StateMachinePerformActionEx(
+	IN PRTMP_ADAPTER	pAd,
+	IN STATE_MACHINE_EX *S,
+	IN MLME_QUEUE_ELEM *Elem,
+	USHORT Idx,
+	PULONG pCurrState)
+{
+	if (S->TransFunc[(*pCurrState) * S->NrMsg + Elem->MsgType - S->Base])
+		(*(S->TransFunc[(*pCurrState) * S->NrMsg + Elem->MsgType - S->Base]))(pAd, Elem, pCurrState, Idx);
+
+	return;
+}
+
+/*! \brief   Enqueue a message for other threads, if they want to send messages to MLME thread
+ *  \param  *Queue    The MLME Queue
+ *  \param   Machine  The State Machine Id
+ *  \param   MsgType  The Message Type
+ *  \param   MsgLen   The Message length
+ *  \param  *Msg      The message pointer
+ *  \return  TRUE if enqueue is successful, FALSE if the queue is full
+ *  \pre
+ *  \post
+ *  \note    The message has to be initialized
+ */
+BOOLEAN MlmeEnqueueEx(
+	IN	PRTMP_ADAPTER	pAd,
+	IN ULONG Machine,
+	IN ULONG MsgType,
+	IN ULONG MsgLen,
+	IN VOID *Msg,
+	IN USHORT Idx)
+{
+	INT Tail;
+	MLME_QUEUE *Queue = (MLME_QUEUE *)&pAd->Mlme.Queue;
+
+	// Do nothing if the driver is starting halt state.
+	// This might happen when timer already been fired before cancel timer with mlmehalt
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS))
+		return FALSE;
+
+
+	// First check the size, it MUST not exceed the mlme queue size
+	if (MsgLen > MAX_LEN_OF_MLME_BUFFER)
+	{
+		DBGPRINT_ERR(("MlmeEnqueueEx: msg too large, size = %ld \n", MsgLen));
+		return FALSE;
+	}
+
+	if (MlmeQueueFull(Queue))
+	{
+
+		return FALSE;
+	}
+
+	RTMP_SEM_LOCK(&Queue->Lock);
+	Tail = Queue->Tail;
+	Queue->Tail++;
+	Queue->Num++;
+	if (Queue->Tail == MAX_LEN_OF_MLME_QUEUE)
+	{
+		Queue->Tail = 0;
+	}
+	Queue->Entry[Tail].Occupied = TRUE;
+	Queue->Entry[Tail].Machine = Machine;
+	Queue->Entry[Tail].MsgType = MsgType;
+	Queue->Entry[Tail].MsgLen = MsgLen;
+	Queue->Entry[Tail].Idx = Idx;
+	if (Msg != NULL)
+		NdisMoveMemory(Queue->Entry[Tail].Msg, Msg, MsgLen);
+
+	RTMP_SEM_UNLOCK(&Queue->Lock);
+
+	return TRUE;
+}
+
+/*
+    ==========================================================================
+    Description:
+        The drop function, when machine executes this, the message is simply
+        ignored. This function does nothing, the message is freed in
+        StateMachinePerformAction()
+    ==========================================================================
+ */
+VOID DropEx(
+    IN PRTMP_ADAPTER pAd,
+    IN MLME_QUEUE_ELEM *Elem,
+	PULONG pCurrState,
+	USHORT Idx)
+{
+	return;
+}