Atheros AR600x driver + build glue

chromeos/drivers/ath6kl/os/linux/hci_bridge.c

+//------------------------------------------------------------------------------
+// <copyright file="hci_bridge.c" company="Atheros">
+//    Copyright (c) 2009 Atheros Corporation.  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 version 2 as
+// published by the Free Software Foundation;
+//
+// Software distributed under the License is distributed on an "AS
+// IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// rights and limitations under the License.
+//
+//
+//------------------------------------------------------------------------------
+//==============================================================================
+// HCI bridge implementation
+//
+// Author(s): ="Atheros"
+//==============================================================================
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+#include <linux/etherdevice.h>
+#include <a_config.h>
+#include <athdefs.h>
+#include "a_types.h"
+#include "a_osapi.h"
+#include "htc_api.h"
+#include "wmi.h"
+#include "a_drv.h"
+#include "hif.h"
+#include "common_drv.h"
+#include "a_debug.h"
+#define  ATH_DEBUG_HCI_BRIDGE    ATH_DEBUG_MAKE_MODULE_MASK(6)
+#define  ATH_DEBUG_HCI_RECV      ATH_DEBUG_MAKE_MODULE_MASK(7)
+#define  ATH_DEBUG_HCI_SEND      ATH_DEBUG_MAKE_MODULE_MASK(8)
+#define  ATH_DEBUG_HCI_DUMP      ATH_DEBUG_MAKE_MODULE_MASK(9)
+#else
+#include "ar6000_drv.h"
+#endif  /* EXPORT_HCI_BRIDGE_INTERFACE */
+
+#ifdef ATH_AR6K_ENABLE_GMBOX
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+#include "export_hci_transport.h"
+#else
+#include "hci_transport_api.h"
+#endif
+#include "epping_test.h"
+#include "gmboxif.h"
+#include "ar3kconfig.h"
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25)
+    /* only build on newer kernels which have BT configured */
+#if defined(CONFIG_BT_MODULE) || defined(CONFIG_BT)
+#define CONFIG_BLUEZ_HCI_BRIDGE  
+#endif
+#endif
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+unsigned int ar3khcibaud = 0;
+unsigned int hciuartscale = 0;
+unsigned int hciuartstep = 0;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+module_param(ar3khcibaud, int, 0644);
+module_param(hciuartscale, int, 0644);
+module_param(hciuartstep, int, 0644);
+#else
+
+#define __user
+/* for linux 2.4 and lower */
+MODULE_PARM(ar3khcibaud, "i");
+MODULE_PARM(hciuartscale, "i");
+MODULE_PARM(hciuartstep, "i");
+#endif
+#else
+extern unsigned int ar3khcibaud;
+extern unsigned int hciuartscale;
+extern unsigned int hciuartstep;
+#endif /* EXPORT_HCI_BRIDGE_INTERFACE */
+
+typedef struct {
+    void                    *pHCIDev;          /* HCI bridge device */
+    HCI_TRANSPORT_PROPERTIES HCIProps;         /* HCI bridge props */
+    struct hci_dev          *pBtStackHCIDev;   /* BT Stack HCI dev */
+    A_BOOL                  HciNormalMode;     /* Actual HCI mode enabled (non-TEST)*/
+    A_BOOL                  HciRegistered;     /* HCI device registered with stack */
+    HTC_PACKET_QUEUE        HTCPacketStructHead;
+    A_UINT8                 *pHTCStructAlloc;
+    spinlock_t              BridgeLock;
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+    HCI_TRANSPORT_MISC_HANDLES    HCITransHdl; 
+#else
+    AR_SOFTC_T              *ar;
+#endif /* EXPORT_HCI_BRIDGE_INTERFACE */
+} AR6K_HCI_BRIDGE_INFO;
+
+#define MAX_ACL_RECV_BUFS           16
+#define MAX_EVT_RECV_BUFS           8
+#define MAX_HCI_WRITE_QUEUE_DEPTH   32
+#define MAX_ACL_RECV_LENGTH         1200
+#define MAX_EVT_RECV_LENGTH         257
+#define TX_PACKET_RSV_OFFSET        32
+#define NUM_HTC_PACKET_STRUCTS     ((MAX_ACL_RECV_BUFS + MAX_EVT_RECV_BUFS + MAX_HCI_WRITE_QUEUE_DEPTH) * 2)
+
+#define HCI_GET_OP_CODE(p)          (((A_UINT16)((p)[1])) << 8) | ((A_UINT16)((p)[0]))
+
+extern unsigned int setupbtdev;
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+AR6K_HCI_BRIDGE_INFO *g_pHcidevInfo;
+#endif
+
+static A_STATUS bt_setup_hci(AR6K_HCI_BRIDGE_INFO *pHcidevInfo);
+static void     bt_cleanup_hci(AR6K_HCI_BRIDGE_INFO *pHcidevInfo);
+static A_STATUS bt_register_hci(AR6K_HCI_BRIDGE_INFO *pHcidevInfo);
+static A_BOOL   bt_indicate_recv(AR6K_HCI_BRIDGE_INFO      *pHcidevInfo, 
+                                 HCI_TRANSPORT_PACKET_TYPE Type, 
+                                 struct sk_buff            *skb);
+static struct sk_buff *bt_alloc_buffer(AR6K_HCI_BRIDGE_INFO *pHcidevInfo, int Length);
+static void     bt_free_buffer(AR6K_HCI_BRIDGE_INFO *pHcidevInfo, struct sk_buff *skb);   
+                               
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+A_STATUS ar6000_setup_hci(void *ar);
+void     ar6000_cleanup_hci(void *ar);
+A_STATUS hci_test_send(void *ar, struct sk_buff *skb);
+#else
+A_STATUS ar6000_setup_hci(AR_SOFTC_T *ar);
+void     ar6000_cleanup_hci(AR_SOFTC_T *ar);
+/* HCI bridge testing */
+A_STATUS hci_test_send(AR_SOFTC_T *ar, struct sk_buff *skb);
+#endif /* EXPORT_HCI_BRIDGE_INTERFACE */
+
+#define LOCK_BRIDGE(dev)   spin_lock_bh(&(dev)->BridgeLock)
+#define UNLOCK_BRIDGE(dev) spin_unlock_bh(&(dev)->BridgeLock)
+
+static inline void FreeBtOsBuf(AR6K_HCI_BRIDGE_INFO *pHcidevInfo, void *osbuf)
+{    
+    if (pHcidevInfo->HciNormalMode) {
+        bt_free_buffer(pHcidevInfo, (struct sk_buff *)osbuf);
+    } else {
+            /* in test mode, these are just ordinary netbuf allocations */
+        A_NETBUF_FREE(osbuf);
+    }
+}
+
+static void FreeHTCStruct(AR6K_HCI_BRIDGE_INFO *pHcidevInfo, HTC_PACKET *pPacket)
+{
+    LOCK_BRIDGE(pHcidevInfo);
+    HTC_PACKET_ENQUEUE(&pHcidevInfo->HTCPacketStructHead,pPacket);
+    UNLOCK_BRIDGE(pHcidevInfo);  
+}
+
+static HTC_PACKET * AllocHTCStruct(AR6K_HCI_BRIDGE_INFO *pHcidevInfo)
+{
+    HTC_PACKET  *pPacket = NULL;
+    LOCK_BRIDGE(pHcidevInfo);
+    pPacket = HTC_PACKET_DEQUEUE(&pHcidevInfo->HTCPacketStructHead);
+    UNLOCK_BRIDGE(pHcidevInfo);  
+    return pPacket;
+}
+
+#define BLOCK_ROUND_UP_PWR2(x, align)    (((int) (x) + ((align)-1)) & ~((align)-1))
+
+static void RefillRecvBuffers(AR6K_HCI_BRIDGE_INFO      *pHcidevInfo, 
+                              HCI_TRANSPORT_PACKET_TYPE Type, 
+                              int                       NumBuffers)
+{
+    int                 length, i;
+    void                *osBuf = NULL;
+    HTC_PACKET_QUEUE    queue;
+    HTC_PACKET          *pPacket;
+
+    INIT_HTC_PACKET_QUEUE(&queue);
+    
+    if (Type == HCI_ACL_TYPE) {     
+        if (pHcidevInfo->HciNormalMode) {  
+            length = HCI_MAX_FRAME_SIZE;
+        } else {
+            length = MAX_ACL_RECV_LENGTH;    
+        }
+    } else {
+        length = MAX_EVT_RECV_LENGTH;
+    }
+    
+        /* add on transport head and tail room */ 
+    length += pHcidevInfo->HCIProps.HeadRoom + pHcidevInfo->HCIProps.TailRoom;
+        /* round up to the required I/O padding */      
+    length = BLOCK_ROUND_UP_PWR2(length,pHcidevInfo->HCIProps.IOBlockPad);
+             
+    for (i = 0; i < NumBuffers; i++) {   
+           
+        if (pHcidevInfo->HciNormalMode) {   
+            osBuf = bt_alloc_buffer(pHcidevInfo,length);       
+        } else {
+            osBuf = A_NETBUF_ALLOC(length);  
+        }
+          
+        if (NULL == osBuf) {
+            break;    
+        }            
+         
+        pPacket = AllocHTCStruct(pHcidevInfo);
+        if (NULL == pPacket) {
+            FreeBtOsBuf(pHcidevInfo,osBuf);
+            AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Failed to alloc HTC struct \n"));
+            break;    
+        }     
+        
+        SET_HTC_PACKET_INFO_RX_REFILL(pPacket,osBuf,A_NETBUF_DATA(osBuf),length,Type);
+            /* add to queue */
+        HTC_PACKET_ENQUEUE(&queue,pPacket);
+    }
+    
+    if (i > 0) {
+        HCI_TransportAddReceivePkts(pHcidevInfo->pHCIDev, &queue);    
+    }
+}
+
+static A_STATUS ar6000_hci_transport_ready(HCI_TRANSPORT_HANDLE     HCIHandle, 
+                                           HCI_TRANSPORT_PROPERTIES *pProps, 
+                                           void                     *pContext)
+{
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)pContext;
+    A_STATUS              status;
+    AR3K_CONFIG_INFO      ar3kconfig;
+    
+    pHcidevInfo->pHCIDev = HCIHandle;
+    
+    A_MEMCPY(&pHcidevInfo->HCIProps,pProps,sizeof(*pProps));
+    
+    AR_DEBUG_PRINTF(ATH_DEBUG_HCI_BRIDGE,("HCI ready (hci:0x%X, headroom:%d, tailroom:%d blockpad:%d) \n", 
+            (A_UINT32)HCIHandle, 
+            pHcidevInfo->HCIProps.HeadRoom, 
+            pHcidevInfo->HCIProps.TailRoom,
+            pHcidevInfo->HCIProps.IOBlockPad));
+    
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+    A_ASSERT((pProps->HeadRoom + pProps->TailRoom) <= (struct net_device *)(pHcidevInfo->HCITransHdl.netDevice)->hard_header_len);
+#else
+    A_ASSERT((pProps->HeadRoom + pProps->TailRoom) <= pHcidevInfo->ar->arNetDev->hard_header_len);
+#endif
+                             
+        /* provide buffers */
+    RefillRecvBuffers(pHcidevInfo, HCI_ACL_TYPE, MAX_ACL_RECV_BUFS);
+    RefillRecvBuffers(pHcidevInfo, HCI_EVENT_TYPE, MAX_EVT_RECV_BUFS);
+   
+    do {
+            /* start transport */
+        status = HCI_TransportStart(pHcidevInfo->pHCIDev);
+         
+        if (A_FAILED(status)) {
+            break;    
+        }
+        
+        if (!pHcidevInfo->HciNormalMode) {
+                /* in test mode, no need to go any further */
+            break;    
+        }
+        
+        A_MEMZERO(&ar3kconfig,sizeof(ar3kconfig));
+        ar3kconfig.pHCIDev = pHcidevInfo->pHCIDev;
+        ar3kconfig.pHCIProps = &pHcidevInfo->HCIProps;
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+        ar3kconfig.pHIFDevice = (HIF_DEVICE *)(pHcidevInfo->HCITransHdl.hifDevice);
+#else
+        ar3kconfig.pHIFDevice = pHcidevInfo->ar->arHifDevice;
+#endif
+        ar3kconfig.pBtStackHCIDev = pHcidevInfo->pBtStackHCIDev;
+        
+        if (ar3khcibaud != 0) {
+                /* user wants ar3k baud rate change */
+            ar3kconfig.Flags |= AR3K_CONFIG_FLAG_SET_AR3K_BAUD;
+            ar3kconfig.Flags |= AR3K_CONFIG_FLAG_AR3K_BAUD_CHANGE_DELAY;
+            ar3kconfig.AR3KBaudRate = ar3khcibaud;    
+        }
+        
+        if ((hciuartscale != 0) || (hciuartstep != 0)) {   
+                /* user wants to tune HCI bridge UART scale/step values */
+            ar3kconfig.AR6KScale = (A_UINT16)hciuartscale;
+            ar3kconfig.AR6KStep = (A_UINT16)hciuartstep;           
+            ar3kconfig.Flags |= AR3K_CONFIG_FLAG_SET_AR6K_SCALE_STEP;
+        }
+        
+            /* configure the AR3K device */         
+        status = AR3KConfigure(&ar3kconfig);
+        if (A_FAILED(status)) {
+            break; 
+        }
+        
+        status = bt_register_hci(pHcidevInfo);
+        
+    } while (FALSE);
+
+    return status; 
+}
+
+static void ar6000_hci_transport_failure(void *pContext, A_STATUS Status)
+{
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)pContext;
+    
+    AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("HCI Bridge: transport failure! \n"));
+    
+    if (pHcidevInfo->HciNormalMode) {
+        /* TODO .. */    
+    }
+}
+
+static void ar6000_hci_transport_removed(void *pContext)
+{
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)pContext;
+    
+    AR_DEBUG_PRINTF(ATH_DEBUG_HCI_BRIDGE, ("HCI Bridge: transport removed. \n"));
+    
+    A_ASSERT(pHcidevInfo->pHCIDev != NULL);
+        
+    HCI_TransportDetach(pHcidevInfo->pHCIDev);
+    bt_cleanup_hci(pHcidevInfo);
+    pHcidevInfo->pHCIDev = NULL;
+}
+
+static void ar6000_hci_send_complete(void *pContext, HTC_PACKET *pPacket)
+{
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)pContext;
+    void                 *osbuf = pPacket->pPktContext;
+    A_ASSERT(osbuf != NULL);
+    A_ASSERT(pHcidevInfo != NULL);
+    
+    if (A_FAILED(pPacket->Status)) {
+        if ((pPacket->Status != A_ECANCELED) && (pPacket->Status != A_NO_RESOURCE)) {
+            AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("HCI Bridge: Send Packet Failed: %d \n",pPacket->Status)); 
+        }   
+    }
+            
+    FreeHTCStruct(pHcidevInfo,pPacket);    
+    FreeBtOsBuf(pHcidevInfo,osbuf);
+    
+}
+
+static void ar6000_hci_pkt_recv(void *pContext, HTC_PACKET *pPacket)
+{
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)pContext;
+    struct sk_buff       *skb;
+    
+    A_ASSERT(pHcidevInfo != NULL);
+    skb = (struct sk_buff *)pPacket->pPktContext;
+    A_ASSERT(skb != NULL);
+          
+    do {
+        
+        if (A_FAILED(pPacket->Status)) {
+            break;
+        }
+  
+        AR_DEBUG_PRINTF(ATH_DEBUG_HCI_RECV, 
+                        ("HCI Bridge, packet received type : %d len:%d \n",
+                        HCI_GET_PACKET_TYPE(pPacket),pPacket->ActualLength));
+    
+            /* set the actual buffer position in the os buffer, HTC recv buffers posted to HCI are set
+             * to fill the front of the buffer */
+        A_NETBUF_PUT(skb,pPacket->ActualLength + pHcidevInfo->HCIProps.HeadRoom);
+        A_NETBUF_PULL(skb,pHcidevInfo->HCIProps.HeadRoom);
+        
+        if (AR_DEBUG_LVL_CHECK(ATH_DEBUG_HCI_DUMP)) {
+            AR_DEBUG_PRINTF(ATH_DEBUG_ANY,("<<< Recv HCI %s packet len:%d \n",
+                        (HCI_GET_PACKET_TYPE(pPacket) == HCI_EVENT_TYPE) ? "EVENT" : "ACL",
+                        skb->len));
+            AR_DEBUG_PRINTBUF(skb->data, skb->len,"BT HCI RECV Packet Dump");
+        }
+        
+        if (pHcidevInfo->HciNormalMode) {
+                /* indicate the packet */         
+            if (bt_indicate_recv(pHcidevInfo,HCI_GET_PACKET_TYPE(pPacket),skb)) {
+                    /* bt stack accepted the packet */
+                skb = NULL;
+            }  
+            break;
+        }
+        
+            /* for testing, indicate packet to the network stack */ 
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+        skb->dev = (struct net_device *)(pHcidevInfo->HCITransHdl.netDevice);        
+        if ((((struct net_device *)pHcidevInfo->HCITransHdl.netDevice)->flags & IFF_UP) == IFF_UP) {
+            skb->protocol = eth_type_trans(skb, (struct net_device *)(pHcidevInfo->HCITransHdl.netDevice));
+#else
+        skb->dev = pHcidevInfo->ar->arNetDev;        
+        if ((pHcidevInfo->ar->arNetDev->flags & IFF_UP) == IFF_UP) {
+            skb->protocol = eth_type_trans(skb, pHcidevInfo->ar->arNetDev);
+#endif
+            netif_rx(skb);
+            skb = NULL;
+        } 
+        
+    } while (FALSE);
+    
+    FreeHTCStruct(pHcidevInfo,pPacket);
+    
+    if (skb != NULL) {
+            /* packet was not accepted, free it */
+        FreeBtOsBuf(pHcidevInfo,skb);       
+    }
+    
+}
+
+static void  ar6000_hci_pkt_refill(void *pContext, HCI_TRANSPORT_PACKET_TYPE Type, int BuffersAvailable)
+{
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)pContext;
+    int                  refillCount;
+
+    if (Type == HCI_ACL_TYPE) {
+        refillCount =  MAX_ACL_RECV_BUFS - BuffersAvailable;   
+    } else {
+        refillCount =  MAX_EVT_RECV_BUFS - BuffersAvailable;     
+    }
+    
+    if (refillCount > 0) {
+        RefillRecvBuffers(pHcidevInfo,Type,refillCount);
+    }
+    
+}
+
+static HCI_SEND_FULL_ACTION  ar6000_hci_pkt_send_full(void *pContext, HTC_PACKET *pPacket)
+{
+    AR6K_HCI_BRIDGE_INFO    *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)pContext;
+    HCI_SEND_FULL_ACTION    action = HCI_SEND_FULL_KEEP;
+    
+    if (!pHcidevInfo->HciNormalMode) {
+            /* for epping testing, check packet tag, some epping packets are
+             * special and cannot be dropped */
+        if (HTC_GET_TAG_FROM_PKT(pPacket) == AR6K_DATA_PKT_TAG) {
+            action = HCI_SEND_FULL_DROP;     
+        }
+    }
+    
+    return action;
+}
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+A_STATUS ar6000_setup_hci(void *ar)
+#else
+A_STATUS ar6000_setup_hci(AR_SOFTC_T *ar)
+#endif
+{
+    HCI_TRANSPORT_CONFIG_INFO config;
+    A_STATUS                  status = A_OK;
+    int                       i;
+    HTC_PACKET                *pPacket;
+    AR6K_HCI_BRIDGE_INFO      *pHcidevInfo;
+        
+       
+    do {
+        
+        pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)A_MALLOC(sizeof(AR6K_HCI_BRIDGE_INFO));
+        
+        if (NULL == pHcidevInfo) {
+            status = A_NO_MEMORY;
+            break;    
+        }
+        
+        A_MEMZERO(pHcidevInfo, sizeof(AR6K_HCI_BRIDGE_INFO));
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+        g_pHcidevInfo = pHcidevInfo;
+        pHcidevInfo->HCITransHdl = *(HCI_TRANSPORT_MISC_HANDLES *)ar;
+#else
+        ar->hcidev_info = pHcidevInfo;
+        pHcidevInfo->ar = ar;
+#endif
+        spin_lock_init(&pHcidevInfo->BridgeLock);
+        INIT_HTC_PACKET_QUEUE(&pHcidevInfo->HTCPacketStructHead);
+
+        ar->exitCallback = AR3KConfigureExit;
+    
+        status = bt_setup_hci(pHcidevInfo);
+        if (A_FAILED(status)) {
+            break;    
+        }
+        
+        if (pHcidevInfo->HciNormalMode) {      
+            AR_DEBUG_PRINTF(ATH_DEBUG_HCI_BRIDGE, ("HCI Bridge: running in normal mode... \n"));    
+        } else {
+            AR_DEBUG_PRINTF(ATH_DEBUG_HCI_BRIDGE, ("HCI Bridge: running in test mode... \n"));     
+        }
+        
+        pHcidevInfo->pHTCStructAlloc = (A_UINT8 *)A_MALLOC((sizeof(HTC_PACKET)) * NUM_HTC_PACKET_STRUCTS);
+        
+        if (NULL == pHcidevInfo->pHTCStructAlloc) {
+            status = A_NO_MEMORY;
+            break;    
+        }
+        
+        pPacket = (HTC_PACKET *)pHcidevInfo->pHTCStructAlloc;
+        for (i = 0; i < NUM_HTC_PACKET_STRUCTS; i++,pPacket++) {
+            FreeHTCStruct(pHcidevInfo,pPacket);                
+        }
+        
+        A_MEMZERO(&config,sizeof(HCI_TRANSPORT_CONFIG_INFO));        
+        config.ACLRecvBufferWaterMark = MAX_ACL_RECV_BUFS / 2;
+        config.EventRecvBufferWaterMark = MAX_EVT_RECV_BUFS / 2;
+        config.MaxSendQueueDepth = MAX_HCI_WRITE_QUEUE_DEPTH;
+        config.pContext = pHcidevInfo;    
+        config.TransportFailure = ar6000_hci_transport_failure;
+        config.TransportReady = ar6000_hci_transport_ready;
+        config.TransportRemoved = ar6000_hci_transport_removed;
+        config.pHCISendComplete = ar6000_hci_send_complete;
+        config.pHCIPktRecv = ar6000_hci_pkt_recv;
+        config.pHCIPktRecvRefill = ar6000_hci_pkt_refill;
+        config.pHCISendFull = ar6000_hci_pkt_send_full;
+       
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+        pHcidevInfo->pHCIDev = HCI_TransportAttach(pHcidevInfo->HCITransHdl.htcHandle, &config);
+#else
+        pHcidevInfo->pHCIDev = HCI_TransportAttach(ar->arHtcTarget, &config);
+#endif
+
+        if (NULL == pHcidevInfo->pHCIDev) {
+            status = A_ERROR;      
+        }
+    
+    } while (FALSE);
+    
+    if (A_FAILED(status)) {
+        if (pHcidevInfo != NULL) {
+            if (NULL == pHcidevInfo->pHCIDev) {
+                /* GMBOX may not be present in older chips */
+                /* just return success */ 
+                status = A_OK;
+            }
+        }
+        ar6000_cleanup_hci(ar);    
+    }
+    
+    return status;
+}
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+void  ar6000_cleanup_hci(void *ar)
+#else
+void  ar6000_cleanup_hci(AR_SOFTC_T *ar)
+#endif
+{
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = g_pHcidevInfo;
+#else
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)ar->hcidev_info;
+#endif
+    
+    if (pHcidevInfo != NULL) {
+        bt_cleanup_hci(pHcidevInfo);   
+        
+        if (pHcidevInfo->pHCIDev != NULL) {
+            HCI_TransportStop(pHcidevInfo->pHCIDev);
+            HCI_TransportDetach(pHcidevInfo->pHCIDev);
+            pHcidevInfo->pHCIDev = NULL;
+        } 
+        
+        if (pHcidevInfo->pHTCStructAlloc != NULL) {
+            A_FREE(pHcidevInfo->pHTCStructAlloc);
+            pHcidevInfo->pHTCStructAlloc = NULL;    
+        }
+        
+        A_FREE(pHcidevInfo);
+#ifndef EXPORT_HCI_BRIDGE_INTERFACE
+        ar->hcidev_info = NULL;
+#endif
+    }
+    
+    
+}
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+A_STATUS hci_test_send(void *ar, struct sk_buff *skb)
+#else
+A_STATUS hci_test_send(AR_SOFTC_T *ar, struct sk_buff *skb)
+#endif
+{
+    int              status = A_OK;
+    int              length;
+    EPPING_HEADER    *pHeader;
+    HTC_PACKET       *pPacket;   
+    HTC_TX_TAG       htc_tag = AR6K_DATA_PKT_TAG;
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = g_pHcidevInfo;
+#else
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)ar->hcidev_info;
+#endif
+            
+    do {
+        
+        if (NULL == pHcidevInfo) {
+            status = A_ERROR;
+            break;    
+        }
+        
+        if (NULL == pHcidevInfo->pHCIDev) {
+            status = A_ERROR;
+            break;    
+        }
+        
+        if (pHcidevInfo->HciNormalMode) {
+                /* this interface cannot run when normal WMI is running */
+            status = A_ERROR;
+            break;    
+        }
+        
+        pHeader = (EPPING_HEADER *)A_NETBUF_DATA(skb);
+        
+        if (!IS_EPPING_PACKET(pHeader)) {
+            status = A_EINVAL;
+            break;
+        }
+                       
+        if (IS_EPING_PACKET_NO_DROP(pHeader)) {
+            htc_tag = AR6K_CONTROL_PKT_TAG;   
+        }
+        
+        length = sizeof(EPPING_HEADER) + pHeader->DataLength;
+                
+        pPacket = AllocHTCStruct(pHcidevInfo);
+        if (NULL == pPacket) {        
+            status = A_NO_MEMORY;
+            break;
+        } 
+     
+        SET_HTC_PACKET_INFO_TX(pPacket,
+                               skb,
+                               A_NETBUF_DATA(skb),
+                               length,
+                               HCI_ACL_TYPE,  /* send every thing out as ACL */
+                               htc_tag);
+             
+        HCI_TransportSendPkt(pHcidevInfo->pHCIDev,pPacket,FALSE);                           
+        pPacket = NULL;
+            
+    } while (FALSE);
+            
+    return status;
+}
+
+void ar6000_set_default_ar3kconfig(AR_SOFTC_T *ar, void *ar3kconfig)
+{
+    AR6K_HCI_BRIDGE_INFO *pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)ar->hcidev_info;
+    AR3K_CONFIG_INFO *config = (AR3K_CONFIG_INFO *)ar3kconfig;
+
+    config->pHCIDev = pHcidevInfo->pHCIDev;
+    config->pHCIProps = &pHcidevInfo->HCIProps;
+    config->pHIFDevice = ar->arHifDevice;
+    config->pBtStackHCIDev = pHcidevInfo->pBtStackHCIDev;
+    config->Flags |= AR3K_CONFIG_FLAG_SET_AR3K_BAUD;
+    config->AR3KBaudRate = 115200;    
+}
+
+#ifdef CONFIG_BLUEZ_HCI_BRIDGE   
+/*** BT Stack Entrypoints *******/
+
+/*
+ * bt_open - open a handle to the device
+*/
+static int bt_open(struct hci_dev *hdev)
+{
+ 
+    AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("HCI Bridge: bt_open - enter - x\n"));
+    set_bit(HCI_RUNNING, &hdev->flags);
+    set_bit(HCI_UP, &hdev->flags);
+    set_bit(HCI_INIT, &hdev->flags);         
+    return 0;
+}
+
+/*
+ * bt_close - close handle to the device
+*/
+static int bt_close(struct hci_dev *hdev)
+{
+    AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("HCI Bridge: bt_close - enter\n"));
+    clear_bit(HCI_RUNNING, &hdev->flags);
+    return 0;
+}
+
+/*
+ * bt_send_frame - send data frames
+*/
+static int bt_send_frame(struct sk_buff *skb)
+{
+    struct hci_dev             *hdev = (struct hci_dev *)skb->dev;
+    HCI_TRANSPORT_PACKET_TYPE  type;
+    AR6K_HCI_BRIDGE_INFO       *pHcidevInfo;
+    A_UINT8                    *pTemp;
+    HTC_PACKET                 *pPacket;
+    A_STATUS                   status = A_OK;
+    struct sk_buff             *txSkb = NULL;
+    
+    if (!hdev) {
+        AR_DEBUG_PRINTF(ATH_DEBUG_WARN, ("HCI Bridge: bt_send_frame - no device\n"));
+        return -ENODEV;
+    }
+      
+    if (!test_bit(HCI_RUNNING, &hdev->flags)) {
+        AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("HCI Bridge: bt_send_frame - not open\n"));
+        return -EBUSY;
+    }
+  
+    pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)hdev->driver_data;   
+    A_ASSERT(pHcidevInfo != NULL);
+      
+    AR_DEBUG_PRINTF(ATH_DEBUG_HCI_SEND, ("+bt_send_frame type: %d \n",bt_cb(skb)->pkt_type));
+    type = HCI_COMMAND_TYPE;
+    
+    switch (bt_cb(skb)->pkt_type) {
+        case HCI_COMMAND_PKT:
+            type = HCI_COMMAND_TYPE;
+            hdev->stat.cmd_tx++;
+            break;
+ 
+        case HCI_ACLDATA_PKT:
+            type = HCI_ACL_TYPE;
+            hdev->stat.acl_tx++;
+            break;
+
+        case HCI_SCODATA_PKT:
+            /* we don't support SCO over the bridge */
+            kfree_skb(skb);
+            return 0;
+        default:
+            A_ASSERT(FALSE);
+            kfree_skb(skb);
+            return 0;
+    } 
+
+    if (AR_DEBUG_LVL_CHECK(ATH_DEBUG_HCI_DUMP)) {
+        AR_DEBUG_PRINTF(ATH_DEBUG_ANY,(">>> Send HCI %s packet len: %d\n",
+                        (type == HCI_COMMAND_TYPE) ? "COMMAND" : "ACL",
+                        skb->len));
+        if (type == HCI_COMMAND_TYPE) {
+            A_UINT16 opcode = HCI_GET_OP_CODE(skb->data);
+            AR_DEBUG_PRINTF(ATH_DEBUG_ANY,("    HCI Command: OGF:0x%X OCF:0x%X \r\n", 
+                  opcode >> 10, opcode & 0x3FF));
+        }
+        AR_DEBUG_PRINTBUF(skb->data,skb->len,"BT HCI SEND Packet Dump");
+    }
+    
+    do {
+        
+        txSkb = bt_skb_alloc(TX_PACKET_RSV_OFFSET + pHcidevInfo->HCIProps.HeadRoom + 
+                             pHcidevInfo->HCIProps.TailRoom + skb->len, 
+                             GFP_ATOMIC);
+
+        if (txSkb == NULL) {
+            status = A_NO_MEMORY;
+            break;    
+        }
+        
+        bt_cb(txSkb)->pkt_type = bt_cb(skb)->pkt_type;
+        txSkb->dev = (void *)pHcidevInfo->pBtStackHCIDev;
+        skb_reserve(txSkb, TX_PACKET_RSV_OFFSET + pHcidevInfo->HCIProps.HeadRoom);
+        A_MEMCPY(txSkb->data, skb->data, skb->len);
+        skb_put(txSkb,skb->len);
+        
+            /* push on header transport space */
+        pTemp = (A_UINT8 *)skb_push(txSkb, pHcidevInfo->HCIProps.HeadRoom);           
+        pPacket = AllocHTCStruct(pHcidevInfo);        
+        if (NULL == pPacket) {
+            status = A_NO_MEMORY;
+            break;    
+        }       
+              
+        SET_HTC_PACKET_INFO_TX(pPacket,
+                               txSkb,
+                               pTemp + pHcidevInfo->HCIProps.HeadRoom, 
+                               txSkb->len,
+                               type, 
+                               AR6K_CONTROL_PKT_TAG); /* HCI packets cannot be dropped */
+        
+        AR_DEBUG_PRINTF(ATH_DEBUG_HCI_SEND, ("HCI Bridge: bt_send_frame skb:0x%X \n",(A_UINT32)txSkb));
+        AR_DEBUG_PRINTF(ATH_DEBUG_HCI_SEND, ("HCI Bridge: type:%d, Total Length:%d Bytes \n",
+                                      type, txSkb->len));
+                                      
+        status = HCI_TransportSendPkt(pHcidevInfo->pHCIDev,pPacket,FALSE);   
+        pPacket = NULL;
+        txSkb = NULL;
+        
+    } while (FALSE);
+   
+    if (txSkb != NULL) {
+        kfree_skb(txSkb);    
+    }
+    
+    kfree_skb(skb);        
+       
+    AR_DEBUG_PRINTF(ATH_DEBUG_HCI_SEND, ("-bt_send_frame  \n"));
+    return 0;
+}
+
+/*
+ * bt_ioctl - ioctl processing
+*/
+static int bt_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
+{
+    AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("HCI Bridge: bt_ioctl - enter\n"));
+    return -ENOIOCTLCMD;
+}
+
+/*
+ * bt_flush - flush outstandingbpackets
+*/
+static int bt_flush(struct hci_dev *hdev)
+{
+    AR6K_HCI_BRIDGE_INFO    *pHcidevInfo; 
+    
+    AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("HCI Bridge: bt_flush - enter\n"));
+    
+    pHcidevInfo = (AR6K_HCI_BRIDGE_INFO *)hdev->driver_data;   
+    
+    /* TODO??? */   
+    
+    return 0;
+}
+
+
+/*
+ * bt_destruct - 
+*/
+static void bt_destruct(struct hci_dev *hdev)
+{
+    AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("HCI Bridge: bt_destruct - enter\n"));
+    /* nothing to do here */
+}
+
+static A_STATUS bt_setup_hci(AR6K_HCI_BRIDGE_INFO *pHcidevInfo)
+{
+    A_STATUS                    status = A_OK;
+    struct hci_dev              *pHciDev = NULL;
+    HIF_DEVICE_OS_DEVICE_INFO   osDevInfo;
+    
+    if (!setupbtdev) {
+        return A_OK;    
+    } 
+        
+    do {
+            
+        A_MEMZERO(&osDevInfo,sizeof(osDevInfo));
+            /* get the underlying OS device */
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+        status = ar6000_get_hif_dev((HIF_DEVICE *)(pHcidevInfo->HCITransHdl.hifDevice), 
+                                    &osDevInfo);
+#else
+        status = HIFConfigureDevice(pHcidevInfo->ar->arHifDevice, 
+                                    HIF_DEVICE_GET_OS_DEVICE,
+                                    &osDevInfo, 
+                                    sizeof(osDevInfo));
+#endif
+                                    
+        if (A_FAILED(status)) {
+            AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Failed to OS device info from HIF\n"));
+            break;
+        }
+        
+            /* allocate a BT HCI struct for this device */
+        pHciDev = hci_alloc_dev();
+        if (NULL == pHciDev) {
+            AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("HCI Bridge - failed to allocate bt struct \n"));
+            status = A_NO_MEMORY;
+            break;
+        }    
+            /* save the device, we'll register this later */
+        pHcidevInfo->pBtStackHCIDev = pHciDev;       
+        SET_HCIDEV_DEV(pHciDev,osDevInfo.pOSDevice);          
+        pHciDev->type = HCI_VIRTUAL;
+        pHciDev->driver_data = pHcidevInfo;
+        pHciDev->open     = bt_open;
+        pHciDev->close    = bt_close;
+        pHciDev->send     = bt_send_frame;
+        pHciDev->ioctl    = bt_ioctl;
+        pHciDev->flush    = bt_flush;
+        pHciDev->destruct = bt_destruct;
+        pHciDev->owner = THIS_MODULE; 
+            /* driver is running in normal BT mode */
+        pHcidevInfo->HciNormalMode = TRUE;  
+        
+    } while (FALSE);
+    
+    if (A_FAILED(status)) {
+        bt_cleanup_hci(pHcidevInfo);    
+    }
+    
+    return status;
+}
+
+static void bt_cleanup_hci(AR6K_HCI_BRIDGE_INFO *pHcidevInfo)
+{   
+    int   err;      
+        
+    if (pHcidevInfo->HciRegistered) {
+        pHcidevInfo->HciRegistered = FALSE;
+        clear_bit(HCI_RUNNING, &pHcidevInfo->pBtStackHCIDev->flags);
+        clear_bit(HCI_UP, &pHcidevInfo->pBtStackHCIDev->flags);
+        clear_bit(HCI_INIT, &pHcidevInfo->pBtStackHCIDev->flags);   
+        A_ASSERT(pHcidevInfo->pBtStackHCIDev != NULL);
+            /* unregister */
+        if ((err = hci_unregister_dev(pHcidevInfo->pBtStackHCIDev)) < 0) {
+            AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("HCI Bridge: failed to unregister with bluetooth %d\n",err));
+        }          
+    }   
+    
+    if (pHcidevInfo->pBtStackHCIDev != NULL) {
+        kfree(pHcidevInfo->pBtStackHCIDev);
+        pHcidevInfo->pBtStackHCIDev = NULL;
+    }  
+}
+
+static A_STATUS bt_register_hci(AR6K_HCI_BRIDGE_INFO *pHcidevInfo)
+{
+    int       err;
+    A_STATUS  status = A_OK;
+    
+    do {          
+        AR_DEBUG_PRINTF(ATH_DEBUG_HCI_BRIDGE, ("HCI Bridge: registering HCI... \n"));
+        A_ASSERT(pHcidevInfo->pBtStackHCIDev != NULL);
+             /* mark that we are registered */
+        pHcidevInfo->HciRegistered = TRUE;
+        if ((err = hci_register_dev(pHcidevInfo->pBtStackHCIDev)) < 0) {
+            AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("HCI Bridge: failed to register with bluetooth %d\n",err));
+            pHcidevInfo->HciRegistered = FALSE;
+            status = A_ERROR;
+            break;
+        }
+    
+        AR_DEBUG_PRINTF(ATH_DEBUG_HCI_BRIDGE, ("HCI Bridge: HCI registered \n"));
+        
+    } while (FALSE);
+    
+    return status;
+}
+
+static A_BOOL bt_indicate_recv(AR6K_HCI_BRIDGE_INFO      *pHcidevInfo, 
+                               HCI_TRANSPORT_PACKET_TYPE Type, 
+                               struct                    sk_buff *skb)
+{
+    A_UINT8               btType;
+    int                   len;
+    A_BOOL                success = FALSE;
+    BT_HCI_EVENT_HEADER   *pEvent;
+    
+    do {
+             
+        if (!test_bit(HCI_RUNNING, &pHcidevInfo->pBtStackHCIDev->flags)) {
+            AR_DEBUG_PRINTF(ATH_DEBUG_WARN, ("HCI Bridge: bt_indicate_recv - not running\n"));
+            break;
+        }
+    
+        switch (Type) {
+            case HCI_ACL_TYPE:
+                btType = HCI_ACLDATA_PKT;
+                break;
+            case HCI_EVENT_TYPE:  
+                btType = HCI_EVENT_PKT;  
+                break;
+            default:
+                btType = 0;
+                A_ASSERT(FALSE);
+                break;
+        } 
+        
+        if (0 == btType) {
+            break;    
+        }
+        
+            /* set the final type */
+        bt_cb(skb)->pkt_type = btType;
+            /* set dev */
+        skb->dev = (void *)pHcidevInfo->pBtStackHCIDev;
+        len = skb->len;
+        
+        if (AR_DEBUG_LVL_CHECK(ATH_DEBUG_HCI_RECV)) {
+            if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) {                
+                pEvent = (BT_HCI_EVENT_HEADER *)skb->data; 
+                AR_DEBUG_PRINTF(ATH_DEBUG_HCI_RECV, ("BT HCI EventCode: %d, len:%d \n", 
+                        pEvent->EventCode, pEvent->ParamLength));
+            } 
+        }
+        
+            /* pass receive packet up the stack */    
+        if (hci_recv_frame(skb) != 0) {
+            AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("HCI Bridge: hci_recv_frame failed \n"));
+            break;
+        } else {
+            AR_DEBUG_PRINTF(ATH_DEBUG_HCI_RECV, 
+                    ("HCI Bridge: Indicated RCV of type:%d, Length:%d \n",btType,len));
+        }
+            
+        success = TRUE;
+    
+    } while (FALSE); 
+    
+    return success;
+}
+
+static struct sk_buff* bt_alloc_buffer(AR6K_HCI_BRIDGE_INFO *pHcidevInfo, int Length) 
+{ 
+    struct sk_buff *skb;         
+        /* in normal HCI mode we need to alloc from the bt core APIs */
+    skb = bt_skb_alloc(Length, GFP_ATOMIC);
+    if (NULL == skb) {
+        AR_DEBUG_PRINTF(ATH_DEBUG_ERR,("Failed to alloc bt sk_buff \n"));
+    }
+    return skb;
+}
+
+static void bt_free_buffer(AR6K_HCI_BRIDGE_INFO *pHcidevInfo, struct sk_buff *skb)
+{
+    kfree_skb(skb);    
+}
+
+#else // { CONFIG_BLUEZ_HCI_BRIDGE
+
+    /* stubs when we only want to test the HCI bridging Interface without the HT stack */
+static A_STATUS bt_setup_hci(AR6K_HCI_BRIDGE_INFO *pHcidevInfo)
+{
+    return A_OK;    
+}
+static void bt_cleanup_hci(AR6K_HCI_BRIDGE_INFO *pHcidevInfo)
+{   
+     
+}
+static A_STATUS bt_register_hci(AR6K_HCI_BRIDGE_INFO *pHcidevInfo)
+{
+    A_ASSERT(FALSE);
+    return A_ERROR;    
+}
+
+static A_BOOL bt_indicate_recv(AR6K_HCI_BRIDGE_INFO      *pHcidevInfo, 
+                               HCI_TRANSPORT_PACKET_TYPE Type, 
+                               struct                    sk_buff *skb)
+{
+    A_ASSERT(FALSE);
+    return FALSE;    
+}
+
+static struct sk_buff* bt_alloc_buffer(AR6K_HCI_BRIDGE_INFO *pHcidevInfo, int Length) 
+{
+    A_ASSERT(FALSE);
+    return NULL;
+}
+static void bt_free_buffer(AR6K_HCI_BRIDGE_INFO *pHcidevInfo, struct sk_buff *skb)
+{
+    A_ASSERT(FALSE);
+}
+
+#endif // } CONFIG_BLUEZ_HCI_BRIDGE
+
+#else  // { ATH_AR6K_ENABLE_GMBOX
+
+    /* stubs when GMBOX support is not needed */
+    
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+A_STATUS ar6000_setup_hci(void *ar)
+#else
+A_STATUS ar6000_setup_hci(AR_SOFTC_T *ar)
+#endif
+{
+    return A_OK;   
+}
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+void ar6000_cleanup_hci(void *ar)
+#else
+void ar6000_cleanup_hci(AR_SOFTC_T *ar)
+#endif
+{
+    return;    
+}
+
+#ifndef EXPORT_HCI_BRIDGE_INTERFACE
+void ar6000_set_default_ar3kconfig(AR_SOFTC_T *ar, void *ar3kconfig)
+{
+    return;
+}
+#endif
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+int hci_test_send(void *ar, struct sk_buff *skb)
+#else
+int hci_test_send(AR_SOFTC_T *ar, struct sk_buff *skb)
+#endif
+{
+    return -EOPNOTSUPP;
+}
+
+#endif // } ATH_AR6K_ENABLE_GMBOX
+
+
+#ifdef EXPORT_HCI_BRIDGE_INTERFACE
+static int __init
+hcibridge_init_module(void)
+{
+    A_STATUS status;
+    HCI_TRANSPORT_CALLBACKS hciTransCallbacks;
+
+    hciTransCallbacks.setupTransport = ar6000_setup_hci;
+    hciTransCallbacks.cleanupTransport = ar6000_cleanup_hci;
+
+    status = ar6000_register_hci_transport(&hciTransCallbacks);
+    if(status != A_OK)
+        return -ENODEV;
+
+    return 0;
+}
+
+static void __exit
+hcibridge_cleanup_module(void)
+{
+}
+
+module_init(hcibridge_init_module);
+module_exit(hcibridge_cleanup_module);
+MODULE_LICENSE("GPL and additional rights");
+#endif