Staging: add CSR wifi module

This consists of two modules, the driver, and a "helper" module that is
just a wrapper around common kernel functions.  The wrapper module will
be removed soon, but for now it's needed.

These files were based on the csr-linux-wifi-5.0.3-oss.tar.gz package
provided by CSR and Blue Giga, and is covered under the license
specified in the LICENSE.txt file (basically dual BSD and GPLv2).  The
files were flattened out of the deep directory mess they were originally
in, and a few EXPORT_SYMBOL_GPL() were added in order for everything to
link properly with the helper module setup.

Cc: Mikko Virkkilä <mikko.virkkila@bluegiga.com>
Cc: Lauri Hintsala <Lauri.Hintsala@bluegiga.com>
Cc: Riku Mettälä <riku.mettala@bluegiga.com>
Cc: Veli-Pekka Peltola <veli-pekka.peltola@bluegiga.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 210 insertions, 0 deletions

diff --git a/drivers/staging/csr/csr_wifi_router_transport.c b/drivers/staging/csr/csr_wifi_router_transport.c
new file mode 100644
index 00000000000..ec7e01dda40
--- /dev/null
+++ b/drivers/staging/csr/csr_wifi_router_transport.c
@@ -0,0 +1,210 @@
+/** @file router_transport.c
+ *
+ *
+ * Copyright (C) Cambridge Silicon Radio Ltd 2006-2010. All rights reserved.
+ *
+ * Refer to LICENSE.txt included with this source code for details on
+ * the license terms.
+ *
+ ****************************************************************************/
+
+#include "unifi_priv.h"
+
+#include "csr_types.h"
+#include "csr_sched.h"
+#include "csr_msgconv.h"
+
+#include "sme_userspace.h"
+
+#include "csr_wifi_hostio_prim.h"
+#include "csr_wifi_router_lib.h"
+#include "csr_wifi_router_sef.h"
+#include "csr_wifi_router_converter_init.h"
+#include "csr_wifi_router_ctrl_lib.h"
+#include "csr_wifi_router_ctrl_sef.h"
+#include "csr_wifi_router_ctrl_converter_init.h"
+#include "csr_wifi_sme_prim.h"
+#include "csr_wifi_sme_sef.h"
+#include "csr_wifi_sme_converter_init.h"
+#ifdef CSR_SUPPORT_WEXT
+#ifdef CSR_SUPPORT_WEXT_AP
+#include "csr_wifi_nme_ap_prim.h"
+#include "csr_wifi_nme_ap_sef.h"
+#include "csr_wifi_nme_ap_converter_init.h"
+#endif
+#endif
+
+static unifi_priv_t *drvpriv = NULL;
+void CsrWifiRouterTransportInit(unifi_priv_t *priv)
+{
+    unifi_trace(priv, UDBG1, "CsrWifiRouterTransportInit: \n");
+
+    drvpriv = priv;
+    (void)CsrMsgConvInit();
+    CsrWifiRouterConverterInit();
+    CsrWifiRouterCtrlConverterInit();
+    CsrWifiSmeConverterInit();
+#ifdef CSR_SUPPORT_WEXT
+#ifdef CSR_SUPPORT_WEXT_AP
+    CsrWifiNmeApConverterInit();
+#endif
+#endif
+}
+
+void CsrWifiRouterTransportDeinit(unifi_priv_t *priv)
+{
+    unifi_trace(priv, UDBG1, "CsrWifiRouterTransportDeinit: \n");
+    if (priv == drvpriv)
+    {
+        CsrMsgConvDeinit();
+        drvpriv = NULL;
+    }
+}
+
+void CsrWifiRouterTransportRecv(unifi_priv_t *priv, CsrUint8* buffer, CsrSize bufferLength)
+{
+    CsrMsgConvMsgEntry* msgEntry;
+    CsrUint16 primType;
+    CsrSchedQid src;
+    CsrSchedQid dest;
+    CsrUint16 msgType;
+    CsrSize offset = 0;
+    CsrWifiFsmEvent* msg;
+
+    /* Decode the prim and message type */
+    CsrUint16Des(&primType, buffer, &offset);
+    CsrUint16Des(&src, buffer, &offset);
+    CsrUint16Des(&dest, buffer, &offset);
+    CsrUint16Des(&msgType, buffer, &offset);
+    offset -= 2; /* Adjust as the Deserialise Function will read this as well */
+
+    unifi_trace(priv, UDBG4, "CsrWifiRouterTransportRecv: primType=0x%.4X, msgType=0x%.4X, bufferLength=%d\n",
+                primType, msgType, bufferLength);
+
+    /* Special handling for HOSTIO messages.... */
+    if (primType == CSR_WIFI_HOSTIO_PRIM)
+    {
+        CsrWifiRouterCtrlHipReq req = {{CSR_WIFI_ROUTER_CTRL_HIP_REQ, CSR_WIFI_ROUTER_CTRL_PRIM, dest, src, NULL}, 0, NULL, 0, NULL, 0, NULL};
+
+        req.mlmeCommandLength = bufferLength;
+        req.mlmeCommand = buffer;
+
+        offset += 8;/* Skip the id, src, dest and slot number */
+        CsrUint16Des(&req.dataRef1Length, buffer, &offset);
+        offset += 2; /* Skip the slot number */
+        CsrUint16Des(&req.dataRef2Length, buffer, &offset);
+
+        if (req.dataRef1Length)
+        {
+            CsrUint16 dr1Offset = (bufferLength - req.dataRef2Length) - req.dataRef1Length;
+            req.dataRef1 = &buffer[dr1Offset];
+        }
+
+        if (req.dataRef2Length)
+        {
+            CsrUint16 dr2Offset = bufferLength - req.dataRef2Length;
+            req.dataRef2 = &buffer[dr2Offset];
+        }
+
+        /* Copy the hip data but strip off the prim type */
+        req.mlmeCommandLength -= (req.dataRef1Length + req.dataRef2Length + 6);
+        req.mlmeCommand = &buffer[6];
+
+        CsrWifiRouterCtrlHipReqHandler(priv, &req.common);
+        return;
+    }
+
+    msgEntry = CsrMsgConvFindEntry(primType, msgType);
+    if (!msgEntry)
+    {
+        unifi_error(priv, "CsrWifiRouterTransportDeserialiseAndSend can not process the message. primType=0x%.4X, msgType=0x%.4X\n",
+                    primType, msgType);
+        dump(buffer, bufferLength);
+        return;
+    }
+
+    msg = (CsrWifiFsmEvent*)(msgEntry->deserFunc)(&buffer[offset], bufferLength - offset);
+
+    msg->primtype = primType;
+    msg->type = msgType;
+    msg->source = src;
+    msg->destination = dest;
+
+    switch(primType)
+    {
+    case CSR_WIFI_ROUTER_CTRL_PRIM:
+        CsrWifiRouterCtrlDownstreamStateHandlers[msg->type - CSR_WIFI_ROUTER_CTRL_PRIM_DOWNSTREAM_LOWEST](priv, msg);
+        CsrWifiRouterCtrlFreeDownstreamMessageContents(CSR_WIFI_ROUTER_CTRL_PRIM, msg);
+        break;
+    case CSR_WIFI_ROUTER_PRIM:
+        CsrWifiRouterDownstreamStateHandlers[msg->type - CSR_WIFI_ROUTER_PRIM_DOWNSTREAM_LOWEST](priv, msg);
+        CsrWifiRouterFreeDownstreamMessageContents(CSR_WIFI_ROUTER_PRIM, msg);
+        break;
+        case CSR_WIFI_SME_PRIM:
+            CsrWifiSmeUpstreamStateHandlers[msg->type - CSR_WIFI_SME_PRIM_UPSTREAM_LOWEST](priv, msg);
+            CsrWifiSmeFreeUpstreamMessageContents(CSR_WIFI_SME_PRIM, msg);
+            break;
+#ifdef CSR_SUPPORT_WEXT
+#ifdef CSR_SUPPORT_WEXT_AP
+        case CSR_WIFI_NME_AP_PRIM:
+            CsrWifiNmeApUpstreamStateHandlers(priv, msg);
+            CsrWifiNmeApFreeUpstreamMessageContents(CSR_WIFI_NME_AP_PRIM, msg);
+            break;
+#endif
+#endif
+        default:
+            unifi_error(priv, "CsrWifiRouterTransportDeserialiseAndSend unhandled prim type 0x%.4X\n", primType);
+            break;
+    }
+    CsrPmemFree(msg);
+}
+
+static void CsrWifiRouterTransportSerialiseAndSend(CsrUint16 primType, void* msg)
+{
+    CsrWifiFsmEvent* evt = (CsrWifiFsmEvent*)msg;
+    CsrMsgConvMsgEntry* msgEntry;
+    CsrSize msgSize;
+    CsrSize encodeBufferLen = 0;
+    CsrSize offset = 0;
+    CsrUint8* encodeBuffer;
+
+    unifi_trace(drvpriv, UDBG4, "CsrWifiRouterTransportSerialiseAndSend: primType=0x%.4X, msgType=0x%.4X\n",
+                primType, evt->type);
+
+    msgEntry = CsrMsgConvFindEntry(primType, evt->type);
+    if (!msgEntry)
+    {
+        unifi_error(drvpriv, "CsrWifiRouterTransportSerialiseAndSend can not process the message. primType=0x%.4X, msgType=0x%.4X\n",
+                    primType, evt->type);
+        return;
+    }
+
+    msgSize = 6 + (msgEntry->sizeofFunc)((void*)msg);
+
+    encodeBuffer = CsrPmemAlloc(msgSize);
+
+    /* Encode PrimType */
+    CsrUint16Ser(encodeBuffer, &encodeBufferLen, primType);
+    CsrUint16Ser(encodeBuffer, &encodeBufferLen, evt->source);
+    CsrUint16Ser(encodeBuffer, &encodeBufferLen, evt->destination);
+
+    (void)(msgEntry->serFunc)(&encodeBuffer[encodeBufferLen], &offset, msg);
+    encodeBufferLen += offset;
+
+    uf_sme_queue_message(drvpriv, encodeBuffer, encodeBufferLen);
+
+    /* Do not use msgEntry->freeFunc because the memory is owned by the driver */
+    CsrPmemFree(msg);
+}
+
+#if defined(CSR_LOG_ENABLE) && defined(CSR_LOG_INCLUDE_FILE_NAME_AND_LINE_NUMBER)
+void CsrSchedMessagePutStringLog(CsrSchedQid q, CsrUint16 mi, void *mv, CsrUint32 line, CsrCharString *file)
+#else
+void CsrSchedMessagePut(CsrSchedQid q, CsrUint16 mi, void *mv)
+#endif
+{
+    CsrWifiFsmEvent* evt = (CsrWifiFsmEvent*)mv;
+    evt->destination = q;
+    CsrWifiRouterTransportSerialiseAndSend(mi, mv);
+}
+