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//------------------------------------------------------------------------------
// Copyright (c) 2004-2010 Atheros Communications Inc.
// All rights reserved.
//
//
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
//
//
// Author(s): ="Atheros"
//------------------------------------------------------------------------------
/* PAL Transport driver for AR6003 */
#include "ar6000_drv.h"
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <ar6k_pal.h>
extern unsigned int setupbtdev;
extern unsigned int loghci;
#define bt_check_bit(val, bit) (val & bit)
#define bt_set_bit(val, bit) (val |= bit)
#define bt_clear_bit(val, bit) (val &= ~bit)
/* export ATH_AR6K_DEBUG_HCI_PAL=yes in host/localmake.linux.inc
* to enable debug information */
#ifdef HCIPAL_DEBUG
#define PRIN_LOG(format, args...) printk(KERN_ALERT "%s:%d - %s Msg:" format "\n",__FUNCTION__, __LINE__, __FILE__, ## args)
#else
#define PRIN_LOG(format, args...)
#endif
/*** BT Stack Entrypoints *******/
/***************************************
* bt_open - open a handle to the device
***************************************/
static int bt_open(struct hci_dev *hdev)
{
PRIN_LOG("HCI PAL: 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)
{
PRIN_LOG("HCI PAL: bt_close - enter\n");
clear_bit(HCI_RUNNING, &hdev->flags);
return 0;
}
/*****************************
* bt_ioctl - ioctl processing
*****************************/
static int bt_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
{
PRIN_LOG("HCI PAL: bt_ioctl - enter\n");
return -ENOIOCTLCMD;
}
/**************************************
* bt_flush - flush outstanding packets
**************************************/
static int bt_flush(struct hci_dev *hdev)
{
PRIN_LOG("HCI PAL: bt_flush - enter\n");
return 0;
}
/***************
* bt_destruct
***************/
static void bt_destruct(struct hci_dev *hdev)
{
PRIN_LOG("HCI PAL: bt_destruct - enter\n");
/* nothing to do here */
}
/****************************************************
* Invoked from bluetooth stack via hdev->send()
* to send the packet out via ar6k to PAL firmware.
*
* For HCI command packet wmi_send_hci_cmd() is invoked.
* wmi_send_hci_cmd adds WMI_CMD_HDR and sends the packet
* to PAL firmware.
*
* For HCI ACL data packet wmi_data_hdr_add is invoked
* to add WMI_DATA_HDR to the packet. ar6000_acl_data_tx
* is then invoked to send the packet to PAL firmware.
******************************************************/
static int btpal_send_frame(struct sk_buff *skb)
{
struct hci_dev *hdev = (struct hci_dev *)skb->dev;
HCI_TRANSPORT_PACKET_TYPE type;
ar6k_hci_pal_info_t *pHciPalInfo;
A_STATUS status = A_OK;
struct sk_buff *txSkb = NULL;
AR_SOFTC_DEV_T *ar;
if (!hdev) {
PRIN_LOG("HCI PAL: btpal_send_frame - no device\n");
return -ENODEV;
}
if (!test_bit(HCI_RUNNING, &hdev->flags)) {
PRIN_LOG("HCI PAL: btpal_send_frame - not open\n");
return -EBUSY;
}
pHciPalInfo = (ar6k_hci_pal_info_t *)hdev->driver_data;
A_ASSERT(pHciPalInfo != NULL);
ar = pHciPalInfo->ar;
PRIN_LOG("+btpal_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 pal */
kfree_skb(skb);
return 0;
default:
A_ASSERT(FALSE);
kfree_skb(skb);
return 0;
}
if(loghci) {
A_PRINTF(">>> Send HCI %s packet len: %d\n",
(type == HCI_COMMAND_TYPE) ? "COMMAND" : "ACL",
skb->len);
if (type == HCI_COMMAND_TYPE) {
A_PRINTF("HCI Command: OGF:0x%X OCF:0x%X \r\n",
(HCI_GET_OP_CODE(skb->data)) >> 10,
(HCI_GET_OP_CODE(skb->data)) & 0x3FF);
}
DebugDumpBytes(skb->data,skb->len,"BT HCI SEND Packet Dump");
}
do {
if(type == HCI_COMMAND_TYPE)
{
PRIN_LOG("HCI command");
if (ar->arSoftc->arWmiReady == FALSE)
{
PRIN_LOG("WMI not ready ");
break;
}
if (wmi_send_hci_cmd(ar->arWmi, skb->data, skb->len) != A_OK)
{
PRIN_LOG("send hci cmd error");
break;
}
}
else if(type == HCI_ACL_TYPE)
{
void *osbuf;
PRIN_LOG("ACL data");
if (ar->arSoftc->arWmiReady == FALSE)
{
PRIN_LOG("WMI not ready");
break;
}
/* need to add WMI header so allocate a skb with more space */
txSkb = bt_skb_alloc(TX_PACKET_RSV_OFFSET + WMI_MAX_TX_META_SZ +
sizeof(WMI_DATA_HDR) + skb->len,
GFP_ATOMIC);
if (txSkb == NULL) {
status = A_NO_MEMORY;
PRIN_LOG("No memory");
break;
}
bt_cb(txSkb)->pkt_type = bt_cb(skb)->pkt_type;
txSkb->dev = (void *)pHciPalInfo->hdev;
skb_reserve(txSkb, TX_PACKET_RSV_OFFSET + WMI_MAX_TX_META_SZ + sizeof(WMI_DATA_HDR));
A_MEMCPY(txSkb->data, skb->data, skb->len);
skb_put(txSkb,skb->len);
/* Add WMI packet type */
osbuf = (void *)txSkb;
PRIN_LOG("\nAdd WMI header");
if (wmi_data_hdr_add(ar->arWmi, osbuf, DATA_MSGTYPE, 0, WMI_DATA_HDR_DATA_TYPE_ACL,0,NULL) != A_OK) {
PRIN_LOG("XIOCTL_ACL_DATA - wmi_data_hdr_add failed\n");
} else {
/* Send data buffer over HTC */
PRIN_LOG("acl data tx");
ar6000_acl_data_tx(osbuf, ar);
}
txSkb = NULL;
}
} while (FALSE);
if (txSkb != NULL) {
PRIN_LOG("Free skb");
kfree_skb(txSkb);
}
kfree_skb(skb);
return 0;
}
/***********************************************
* Unregister HCI device and free HCI device info
***********************************************/
static void bt_cleanup_hci_pal(ar6k_hci_pal_info_t *pHciPalInfo)
{
int err;
if (bt_check_bit(pHciPalInfo->ulFlags, HCI_REGISTERED)) {
bt_clear_bit(pHciPalInfo->ulFlags, HCI_REGISTERED);
clear_bit(HCI_RUNNING, &pHciPalInfo->hdev->flags);
clear_bit(HCI_UP, &pHciPalInfo->hdev->flags);
clear_bit(HCI_INIT, &pHciPalInfo->hdev->flags);
A_ASSERT(pHciPalInfo->hdev != NULL);
#ifdef CONFIG_BT
/* unregister */
PRIN_LOG("Unregister PAL device");
if ((err = hci_unregister_dev(pHciPalInfo->hdev)) < 0) {
PRIN_LOG("HCI PAL: failed to unregister with bluetooth %d\n",err);
}
#else
(void)&err;
#endif
}
if (pHciPalInfo->hdev != NULL) {
kfree(pHciPalInfo->hdev);
pHciPalInfo->hdev = NULL;
}
}
/*********************************************************
* Allocate HCI device and store in PAL private info structure.
*********************************************************/
static A_STATUS bt_setup_hci_pal(ar6k_hci_pal_info_t *pHciPalInfo)
{
#ifdef CONFIG_BT
A_STATUS status = A_OK;
struct hci_dev *pHciDev = NULL;
#if 0 //This condition is not required for PAL
if (!setupbtdev) {
return A_OK;
}
#endif
do {
/* allocate a BT HCI struct for this device */
pHciDev = hci_alloc_dev();
if (NULL == pHciDev) {
PRIN_LOG("HCI PAL driver - failed to allocate BT HCI struct \n");
status = A_NO_MEMORY;
break;
}
/* save the device, we'll register this later */
pHciPalInfo->hdev = pHciDev;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 37)
SET_HCI_BUS_TYPE(pHciDev, HCI_VIRTUAL, HCI_80211);
#else
SET_HCI_BUS_TYPE(pHciDev, HCI_VIRTUAL, HCI_AMP);
#endif
pHciDev->driver_data = pHciPalInfo;
pHciDev->open = bt_open;
pHciDev->close = bt_close;
pHciDev->send = btpal_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 */
PRIN_LOG("Normal mode enabled");
bt_set_bit(pHciPalInfo->ulFlags, HCI_NORMAL_MODE);
} while (FALSE);
if (A_FAILED(status)) {
bt_cleanup_hci_pal(pHciPalInfo);
}
return status;
#else
(void)&bt_open;
(void)&bt_close;
(void)&btpal_send_frame;
(void)&bt_ioctl;
(void)&bt_flush;
(void)&bt_destruct;
bt_cleanup_hci_pal(pHciPalInfo);
return A_ENOTSUP;
#endif
}
/**********************************************
* Cleanup HCI device and free HCI PAL private info
*********************************************/
void ar6k_cleanup_hci_pal(void *ar_p)
{
AR_SOFTC_DEV_T *ar = (AR_SOFTC_DEV_T *)ar_p;
ar6k_hci_pal_info_t *pHciPalInfo = (ar6k_hci_pal_info_t *)ar->hcipal_info;
if (pHciPalInfo != NULL) {
bt_cleanup_hci_pal(pHciPalInfo);
A_FREE(pHciPalInfo);
ar->hcipal_info = NULL;
}
}
/****************************
* Register HCI device
****************************/
static A_BOOL ar6k_pal_transport_ready(void *pHciPal)
{
#ifdef CONFIG_BT
ar6k_hci_pal_info_t *pHciPalInfo = (ar6k_hci_pal_info_t *)pHciPal;
PRIN_LOG("HCI device transport ready");
if(pHciPalInfo == NULL)
return FALSE;
if (hci_register_dev(pHciPalInfo->hdev) < 0) {
PRIN_LOG("Can't register HCI device");
hci_free_dev(pHciPalInfo->hdev);
return FALSE;
}
PRIN_LOG("HCI device registered");
pHciPalInfo->ulFlags |= HCI_REGISTERED;
return TRUE;
#else
return FALSE;
#endif
}
/**************************************************
* Called from ar6k driver when command or ACL data
* packet is received. Pass the packet to bluetooth
* stack via hci_recv_frame.
**************************************************/
A_BOOL ar6k_pal_recv_pkt(void *pHciPal, void *osbuf)
{
struct sk_buff *skb = (struct sk_buff *)osbuf;
ar6k_hci_pal_info_t *pHciPalInfo;
A_BOOL success = FALSE;
A_UINT8 btType = 0;
pHciPalInfo = (ar6k_hci_pal_info_t *)pHciPal;
do {
/* if normal mode is not enabled pass on to the stack
* by returning failure */
if(!(pHciPalInfo->ulFlags & HCI_NORMAL_MODE))
{
PRIN_LOG("Normal mode not enabled");
break;
}
if (!test_bit(HCI_RUNNING, &pHciPalInfo->hdev->flags)) {
PRIN_LOG("HCI PAL: HCI - not running\n");
break;
}
if(*((short *)A_NETBUF_DATA(skb)) == WMI_ACL_DATA_EVENTID)
btType = HCI_ACLDATA_PKT;
else
btType = HCI_EVENT_PKT;
/* pull 4 bytes which contains WMI packet type */
A_NETBUF_PULL(skb, sizeof(int));
bt_cb(skb)->pkt_type = btType;
skb->dev = (void *)pHciPalInfo->hdev;
if(loghci) {
AR_DEBUG_PRINTF(ATH_DEBUG_ANY,("<<< Recv HCI %s packet len:%d \n",
(btType == HCI_EVENT_TYPE) ? "EVENT" : "ACL",
skb->len));
DebugDumpBytes(skb->data, skb->len,"BT HCI RECV Packet Dump");
}
/* pass the received event packet up the stack */
#ifdef CONFIG_BT
if (hci_recv_frame(skb) != 0) {
#else
if (1) {
#endif
PRIN_LOG("HCI PAL: hci_recv_frame failed \n");
break;
} else {
PRIN_LOG("HCI PAL: Indicated RCV of type:%d, Length:%d \n",HCI_EVENT_PKT, skb->len);
}
PRIN_LOG("hci recv success");
success = TRUE;
}while(FALSE);
return success;
}
/**********************************************************
* HCI PAL init function called from ar6k when it is loaded..
* Allocates PAL private info, stores the same in ar6k private info.
* Registers a HCI device.
* Registers packet receive callback function with ar6k
**********************************************************/
A_STATUS ar6k_setup_hci_pal(void *ar_p)
{
A_STATUS status = A_OK;
ar6k_hci_pal_info_t *pHciPalInfo;
ar6k_pal_config_t ar6k_pal_config;
AR_SOFTC_DEV_T *ar = (AR_SOFTC_DEV_T *)ar_p;
do {
pHciPalInfo = (ar6k_hci_pal_info_t *)A_MALLOC(sizeof(ar6k_hci_pal_info_t));
if (NULL == pHciPalInfo) {
status = A_NO_MEMORY;
break;
}
A_MEMZERO(pHciPalInfo, sizeof(ar6k_hci_pal_info_t));
ar->hcipal_info = pHciPalInfo;
pHciPalInfo->ar = ar;
status = bt_setup_hci_pal(pHciPalInfo);
if (A_FAILED(status)) {
break;
}
if(bt_check_bit(pHciPalInfo->ulFlags, HCI_NORMAL_MODE))
PRIN_LOG("HCI PAL: running in normal mode... \n");
else
PRIN_LOG("HCI PAL: running in test mode... \n");
ar6k_pal_config.fpar6k_pal_recv_pkt = ar6k_pal_recv_pkt;
register_pal_cb(&ar6k_pal_config);
ar6k_pal_transport_ready(ar->hcipal_info);
} while (FALSE);
if (A_FAILED(status)) {
ar6k_cleanup_hci_pal(ar);
}
return status;
}