int ant_disable(void)
{
int iRet = -1;
ant_channel_type eChannel;
ANT_FUNC_START();
stRxThreadInfo.ucRunThread = 0;
if (stRxThreadInfo.stRxThread != 0) {
ANT_DEBUG_I("Sending shutdown signal to rx thread.");
if(write(stRxThreadInfo.iRxShutdownEventFd, &EVENT_FD_PLUS_ONE, sizeof(EVENT_FD_PLUS_ONE)) < 0)
{
ANT_ERROR("failed to signal rx thread with eventfd. Reason: %s", strerror(errno));
goto out;
}
ANT_DEBUG_I("Waiting for rx thread to finish.");
if (pthread_join(stRxThreadInfo.stRxThread, NULL) < 0) {
ANT_ERROR("failed to join rx thread: %s", strerror(errno));
goto out;
}
} else {
ANT_DEBUG_D("rx thread is not running");
}
for (eChannel = 0; eChannel < NUM_ANT_CHANNELS; eChannel++) {
ant_disable_channel(&stRxThreadInfo.astChannels[eChannel]);
}
iRet = 0;
out:
stRxThreadInfo.stRxThread = 0;
ANT_FUNC_END();
return iRet;
}
////////////////////////////////////////////////////////////////////
// get_and_set_radio_status
//
// Returns if the chip/transport is disabled/enabled/unknown This function WILL
// overwrite what it thinks the state is with what the BlueZ core (kernel)
// thinks it is. It will overwrite enabling or disabling states, and might
// change internal state from enabled, disabled, or unknown to any of these
// three on errors.
//
// Parameters:
// -
//
// Returns:
// The current radio status (ANTRadioEnabledStatus)
//
////////////////////////////////////////////////////////////////////
ANTRadioEnabledStatus get_and_set_radio_status(void)
{
ANT_FUNC_START();
#if USE_EXTERNAL_POWER_LIBRARY
ANTRadioEnabledStatus orig_status = radio_status;
switch (ant_is_enabled())
{
case 0:
radio_status = RADIO_STATUS_DISABLED;
break;
case 1:
radio_status = RADIO_STATUS_ENABLED;
break;
default:
ANT_ERROR("getting chip state returned an error");
radio_status = RADIO_STATUS_UNKNOWN;
break;
}
if (orig_status != radio_status)
{
ANT_DEBUG_I("radio_status (%d -> %d)", orig_status, radio_status);
if (RxParams.pfStateCallback)
RxParams.pfStateCallback(radio_status);
}
#endif
ANT_FUNC_END();
return radio_status;
}
/*
* This thread waits for ANT messages from a VFS file.
*/
void *fnRxThread(void *ant_rx_thread_info)
{
int iMutexLockResult;
int iPollRet;
ant_rx_thread_info_t *stRxThreadInfo;
struct pollfd astPollFd[NUM_POLL_FDS];
ant_channel_type eChannel;
ANT_FUNC_START();
stRxThreadInfo = (ant_rx_thread_info_t *)ant_rx_thread_info;
for (eChannel = 0; eChannel < NUM_ANT_CHANNELS; eChannel++) {
astPollFd[eChannel].fd = stRxThreadInfo->astChannels[eChannel].iFd;
astPollFd[eChannel].events = EVENTS_TO_LISTEN_FOR;
}
// Fill out poll request for the shutdown signaller.
astPollFd[EVENTFD_IDX].fd = stRxThreadInfo->iRxShutdownEventFd;
astPollFd[EVENTFD_IDX].events = POLL_IN;
// Reset the waiting for response, since we don't want a stale value if we were reset.
stRxThreadInfo->bWaitingForKeepaliveResponse = ANT_FALSE;
/* continue running as long as not terminated */
while (stRxThreadInfo->ucRunThread) {
/* Wait for data available on any file (transport path), shorter wait if we just timed out. */
int timeout = stRxThreadInfo->bWaitingForKeepaliveResponse ? KEEPALIVE_TIMEOUT : ANT_POLL_TIMEOUT;
iPollRet = poll(astPollFd, NUM_POLL_FDS, timeout);
if (!iPollRet) {
if(!stRxThreadInfo->bWaitingForKeepaliveResponse)
{
stRxThreadInfo->bWaitingForKeepaliveResponse = ANT_TRUE;
// Keep alive is done on a separate thread so that rxThread can handle flow control during
// the message.
pthread_t thread;
// Don't care if it failed as the consequence is just a missed keep-alive.
pthread_create(&thread, NULL, fnKeepAliveThread, NULL);
// Detach the thread so that we don't need to join it later.
pthread_detach(thread);
ANT_DEBUG_V("poll timed out, checking exit cond");
} else
{
ANT_DEBUG_E("No response to keepalive, attempting recovery.");
doReset(stRxThreadInfo);
goto out;
}
} else if (iPollRet < 0) {
ANT_ERROR("unhandled error: %s, attempting recovery.", strerror(errno));
doReset(stRxThreadInfo);
goto out;
} else {
for (eChannel = 0; eChannel < NUM_ANT_CHANNELS; eChannel++) {
if (areAllFlagsSet(astPollFd[eChannel].revents, EVENT_HARD_RESET)) {
ANT_ERROR("Hard reset indicated by %s. Attempting recovery.",
stRxThreadInfo->astChannels[eChannel].pcDevicePath);
doReset(stRxThreadInfo);
goto out;
} else if (areAllFlagsSet(astPollFd[eChannel].revents, EVENT_CHIP_SHUTDOWN)) {
/* chip reported it was unexpectedly disabled */
ANT_DEBUG_D(
"poll hang-up from %s. exiting rx thread", stRxThreadInfo->astChannels[eChannel].pcDevicePath);
doReset(stRxThreadInfo);
goto out;
} else if (areAllFlagsSet(astPollFd[eChannel].revents, EVENT_DATA_AVAILABLE)) {
ANT_DEBUG_D("data on %s. reading it",
stRxThreadInfo->astChannels[eChannel].pcDevicePath);
// Doesn't matter what data we received, we know the chip is alive.
stRxThreadInfo->bWaitingForKeepaliveResponse = ANT_FALSE;
if (readChannelMsg(eChannel, &stRxThreadInfo->astChannels[eChannel]) < 0) {
// set flag to exit out of Rx Loop
stRxThreadInfo->ucRunThread = 0;
}
} else if (areAllFlagsSet(astPollFd[eChannel].revents, POLLNVAL)) {
ANT_ERROR("poll was called on invalid file descriptor %s. Attempting recovery.",
stRxThreadInfo->astChannels[eChannel].pcDevicePath);
doReset(stRxThreadInfo);
goto out;
} else if (areAllFlagsSet(astPollFd[eChannel].revents, POLLERR)) {
ANT_ERROR("Unknown error from %s. Attempting recovery.",
stRxThreadInfo->astChannels[eChannel].pcDevicePath);
doReset(stRxThreadInfo);
goto out;
} else if (astPollFd[eChannel].revents) {
ANT_DEBUG_W("unhandled poll result %#x from %s",
astPollFd[eChannel].revents,
stRxThreadInfo->astChannels[eChannel].pcDevicePath);
}
}
// Now check for shutdown signal
if(areAllFlagsSet(astPollFd[EVENTFD_IDX].revents, POLLIN))
{
ANT_DEBUG_I("rx thread caught shutdown signal.");
// reset the counter by reading.
uint64_t counter;
read(stRxThreadInfo->iRxShutdownEventFd, &counter, sizeof(counter));
// don't care if read error, going to close the thread anyways.
stRxThreadInfo->ucRunThread = 0;
} else if (astPollFd[EVENTFD_IDX].revents != 0) {
ANT_ERROR("Shutdown event descriptor had unexpected event: %#x. exiting rx thread.",
astPollFd[EVENTFD_IDX].revents);
stRxThreadInfo->ucRunThread = 0;
}
}
}
/* disable ANT radio if not already disabling */
// Try to get stEnabledStatusLock.
// if you get it then no one is enabling or disabling
// if you can't get it assume something made you exit
ANT_DEBUG_V("try getting stEnabledStatusLock in %s", __FUNCTION__);
iMutexLockResult = pthread_mutex_trylock(stRxThreadInfo->pstEnabledStatusLock);
if (!iMutexLockResult) {
ANT_DEBUG_V("got stEnabledStatusLock in %s", __FUNCTION__);
ANT_WARN("rx thread has unexpectedly crashed, cleaning up");
// spoof our handle as closed so we don't try to join ourselves in disable
stRxThreadInfo->stRxThread = 0;
if (g_fnStateCallback) {
g_fnStateCallback(RADIO_STATUS_DISABLING);
}
ant_disable();
if (g_fnStateCallback) {
g_fnStateCallback(ant_radio_enabled_status());
}
ANT_DEBUG_V("releasing stEnabledStatusLock in %s", __FUNCTION__);
pthread_mutex_unlock(stRxThreadInfo->pstEnabledStatusLock);
ANT_DEBUG_V("released stEnabledStatusLock in %s", __FUNCTION__);
} else if (iMutexLockResult != EBUSY) {
ANT_ERROR("rx thread closing code, trylock on state lock failed: %s",
strerror(iMutexLockResult));
} else {
ANT_DEBUG_V("stEnabledStatusLock busy");
}
out:
ANT_FUNC_END();
#ifdef ANDROID
return NULL;
#endif
}
ANTStatus ant_disable_radio(void)
{
int result;
int lockResult;
ANTStatus ret = ANT_STATUS_FAILED;
ANT_FUNC_START();
ANT_DEBUG_V("getting enableLock in %s", __FUNCTION__);
lockResult = pthread_mutex_lock(&enableLock);
if(lockResult)
{
ANT_ERROR("Disable failed to get enableLock mutex: %s", strerror(lockResult));
return ANT_STATUS_FAILED;
}
ANT_DEBUG_V("got enableLock in %s", __FUNCTION__);
ANT_DEBUG_V("getting txLock in %s", __FUNCTION__);
lockResult = pthread_mutex_lock(&txLock);
if (lockResult)
{
ANT_ERROR("Disable txLock failed: %s", strerror(lockResult));
pthread_mutex_unlock(&enableLock);
return ANT_STATUS_FAILED;
}
ANT_DEBUG_V("got txLock in %s", __FUNCTION__);
#if USE_EXTERNAL_POWER_LIBRARY
if (get_and_set_radio_status() != RADIO_STATUS_DISABLED)
{
ANT_DEBUG_I("radio_status (%d -> %d)", radio_status, RADIO_STATUS_DISABLING);
radio_status = RADIO_STATUS_DISABLING;
if (RxParams.pfStateCallback)
RxParams.pfStateCallback(radio_status);
}
result = ant_disable();
ANT_DEBUG_D("ant_disable() result is %d", result);
#else
radio_status = RADIO_STATUS_DISABLED;
#endif
// If rx thread exists ( != 0)
if (RxParams.thread)
{
ANT_DEBUG_V("quit rx thread, joining");
pthread_join(RxParams.thread, NULL);
RxParams.thread = 0;
ANT_DEBUG_V("joined by rx thread");
}
else
{
ANT_DEBUG_W("rx thread is 0 (not created?)");
}
switch (get_and_set_radio_status())
{
case RADIO_STATUS_DISABLED:
ret = ANT_STATUS_SUCCESS;
break;
case RADIO_STATUS_ENABLED:
ANT_ERROR("SERIOUS: ANT was disabled, rx thread quit, but ANT is enabled");
ret = ANT_STATUS_FAILED;
break;
default:
ret = ANT_STATUS_NOT_DE_INITIALIZED;
break;
}
ANT_DEBUG_V("releasing txLock in %s", __FUNCTION__);
pthread_mutex_unlock(&txLock);
ANT_DEBUG_V("released txLock in %s", __FUNCTION__);
ANT_DEBUG_V("releasing enableLock in %s", __FUNCTION__);
pthread_mutex_unlock(&enableLock);
ANT_DEBUG_V("released enableLock in %s", __FUNCTION__);
ANT_FUNC_END();
return ret;
}
ANTStatus ant_enable_radio(void)
{
int result;
int lockResult;
ANTStatus result_status = ANT_STATUS_FAILED;
ANT_FUNC_START();
ANT_DEBUG_V("getting enableLock in %s", __FUNCTION__);
lockResult = pthread_mutex_lock(&enableLock);
if(lockResult)
{
ANT_ERROR("Enable failed to get enableLock mutex: %s", strerror(lockResult));
return ANT_STATUS_FAILED;
}
ANT_DEBUG_V("got enableLock in %s", __FUNCTION__);
if(RADIO_STATUS_DISABLED == radio_status)
{
radio_status = RADIO_STATUS_ENABLING;
}
ANT_DEBUG_V("getting txLock in %s", __FUNCTION__);
lockResult = pthread_mutex_lock(&txLock);
if (lockResult)
{
ANT_ERROR("Enable txLock failed: %s", strerror(lockResult));
pthread_mutex_unlock(&enableLock);
return ANT_STATUS_FAILED;
}
ANT_DEBUG_V("got txLock in %s", __FUNCTION__);
if (get_and_set_radio_status() != RADIO_STATUS_ENABLED)
{
if (RxParams.thread)
{
ANT_WARN("in enable call: rx thread still exists but radio crashed. trying to recover");
ANT_DEBUG_V("radio crashed, letting rx thread join");
pthread_join(RxParams.thread, NULL);
RxParams.thread = 0;
ANT_DEBUG_V("recovered. joined by rx thread");
}
ANT_DEBUG_I("radio_status (%d -> %d)", radio_status, RADIO_STATUS_ENABLING);
radio_status = RADIO_STATUS_ENABLING;
#if USE_EXTERNAL_POWER_LIBRARY
if (RxParams.pfStateCallback)
RxParams.pfStateCallback(radio_status);
#endif
}
#if USE_EXTERNAL_POWER_LIBRARY
result = ant_enable();
ANT_DEBUG_D("ant_enable() result is %d", result);
#else
result = 0;
#endif
if (result == 0)
{
if (RxParams.thread)
{
result_status = ANT_STATUS_SUCCESS;
radio_status = RADIO_STATUS_ENABLED; // sanity assign, cant be enabling
ANT_DEBUG_D("ANT radio re-enabled");
}
else
{
result = pthread_create(&RxParams.thread, NULL, ANTHCIRxThread, NULL);
if (result)
{
ANT_ERROR("Thread initialization failed: %s", strerror(result));
result_status = ANT_STATUS_FAILED;
}
else
{
result_status = ANT_STATUS_SUCCESS;
#if USE_EXTERNAL_POWER_LIBRARY
if (radio_status == RADIO_STATUS_ENABLING)
{
ANT_DEBUG_I("radio_status (%d -> %d)", radio_status, RADIO_STATUS_ENABLED);
radio_status = RADIO_STATUS_ENABLED;
if (RxParams.pfStateCallback)
RxParams.pfStateCallback(radio_status);
}
else
{
ANT_WARN("radio was already enabled but rx thread was not running");
}
#else
radio_status = RADIO_STATUS_ENABLED;
#endif
}
}
}
else
{
result_status = ANT_STATUS_TRANSPORT_INIT_ERR;
}
if (result_status != ANT_STATUS_SUCCESS) // ant_enable() or rx thread creating failed
{
#if USE_EXTERNAL_POWER_LIBRARY
ant_disable();
#endif
switch (get_and_set_radio_status())
{
case RADIO_STATUS_ENABLED:
ANT_ERROR("SERIOUS: enable failed, but ANT is enabled without a rx thread");
break;
default:
ANT_DEBUG_D("Enable failed, after cleanup chip is not enabled");
break;
}
}
ANT_DEBUG_V("releasing txLock in %s", __FUNCTION__);
pthread_mutex_unlock(&txLock);
ANT_DEBUG_V("released txLock in %s", __FUNCTION__);
ANT_DEBUG_V("releasing enableLock in %s", __FUNCTION__);
pthread_mutex_unlock(&enableLock);
ANT_DEBUG_V("released enableLock in %s", __FUNCTION__);
ANT_FUNC_END();
return result_status;
}
int readChannelMsg(ant_channel_type eChannel, ant_channel_info_t *pstChnlInfo)
{
int iRet = -1;
int iRxLenRead;
int iCurrentHciPacketOffset;
int iHciDataSize;
/*1++++++++++++++++++*/
int i = 0;
int temp_offset = 0;
int RxLength = 0;
/*1++++++++++++++++++*/
ANT_FUNC_START();
// Keep trying to read while there is an error, and that error is EAGAIN
/*1-------------------------------------------------------------*/
// while (((iRxLenRead = read(pstChnlInfo->iFd, &aucRxBuffer[eChannel][iRxBufferLength[eChannel]], (sizeof(aucRxBuffer[eChannel]) - iRxBufferLength[eChannel]))) < 0)
// && errno == EAGAIN)
// ;
/*1-------------------------------------------------------------*/
/*2++++++++++++++++++++++++++++++++++++++++++++++*/
while (((RxLength = read(pstChnlInfo->iFd, &auRxBuffer, ANT_HCI_MAX_MSG_SIZE)) < 0)
&& errno == EAGAIN);
/*2++++++++++++++++++++++++++++++++++++++++++++++*/
if (RxLength < 0) {
if (errno == ENODEV) {
ANT_ERROR("%s not enabled, exiting rx thread",
pstChnlInfo->pcDevicePath);
goto out;
} else if (errno == ENXIO) {
ANT_ERROR("%s there is no physical ANT device connected",
pstChnlInfo->pcDevicePath);
goto out;
} else {
ANT_ERROR("%s read thread exiting, unhandled error: %s",
pstChnlInfo->pcDevicePath, strerror(errno));
goto out;
}
} else {
/*3++++++++++++++++++++++++++++++++++++++++++++++*/
memcpy((&auRxTempBuff[partial_len]) , &auRxBuffer, RxLength);
RxLength += partial_len;
ANT_SERIAL(auRxBuffer, RxLength, 'A');
/*check header byte */
for(temp_offset = 0; temp_offset < RxLength; temp_offset++){
if((auRxTempBuff[temp_offset] == COMMAND_HEDAER) || (auRxTempBuff[temp_offset] == HEADER_TYPE)){
if((auRxTempBuff[temp_offset + 1] + temp_offset + 2) <= RxLength){
RxLength--;
for(i = 0; i < (RxLength - temp_offset); i++)
auRxTempBuff[temp_offset + i] = auRxTempBuff[temp_offset + i + 1];
temp_offset += auRxTempBuff[temp_offset];
}else{
partial_len = RxLength - temp_offset;
RxLength = temp_offset;
}
}
}
if (RxLength) {
ANT_SERIAL(auRxTempBuff, RxLength, 'B');
ANT_DEBUG_I("rx_len: %d !",RxLength);
memcpy(&aucRxBuffer[eChannel][iRxBufferLength[eChannel]], &auRxTempBuff,RxLength);
if(partial_len){
ANT_DEBUG_I("partial pkt: %d !",partial_len);
for(i = 0; i < partial_len; i++)
auRxTempBuff[i] = auRxTempBuff[RxLength + i];
}
iRxLenRead = RxLength;
} else {
ANT_DEBUG_I("less than 1 pkt! rxd_len: %d !",partial_len);
iRet = 0;
goto out;
}
/*3++++++++++++++++++++++++++++++++++++++++++++++*/
ANT_SERIAL(aucRxBuffer[eChannel], iRxLenRead, 'R');
iRxLenRead += iRxBufferLength[eChannel]; // add existing data on
// if we didn't get a full packet, then just exit
if (iRxLenRead < (aucRxBuffer[eChannel][ANT_HCI_SIZE_OFFSET] + ANT_HCI_HEADER_SIZE + ANT_HCI_FOOTER_SIZE)) {
iRxBufferLength[eChannel] = iRxLenRead;
iRet = 0;
goto out;
}
iRxBufferLength[eChannel] = 0; // reset buffer length here since we should have a full packet
#if ANT_HCI_OPCODE_SIZE == 1 // Check the different message types by opcode
ANT_U8 opcode = aucRxBuffer[eChannel][ANT_HCI_OPCODE_OFFSET];
if(ANT_HCI_OPCODE_COMMAND_COMPLETE == opcode) {
// Command Complete, so signal a FLOW_GO
if(setFlowControl(pstChnlInfo, ANT_FLOW_GO)) {
goto out;
}
} else if(ANT_HCI_OPCODE_FLOW_ON == opcode) {
// FLow On, so resend the last Tx
#ifdef ANT_FLOW_RESEND
// Check if there is a message to resend
if(pstChnlInfo->ucResendMessageLength > 0) {
ant_tx_message_flowcontrol_none(eChannel, pstChnlInfo->ucResendMessageLength, pstChnlInfo->pucResendMessage);
} else {
ANT_DEBUG_D("Resend requested by chip, but tx request cancelled");
}
#endif // ANT_FLOW_RESEND
} else if(ANT_HCI_OPCODE_ANT_EVENT == opcode)
// ANT Event, send ANT packet to Rx Callback
#endif // ANT_HCI_OPCODE_SIZE == 1
{
// Received an ANT packet
iCurrentHciPacketOffset = 0;
while(iCurrentHciPacketOffset < iRxLenRead) {
// TODO Allow HCI Packet Size value to be larger than 1 byte
// This currently works as no size value is greater than 255, and little endian
iHciDataSize = aucRxBuffer[eChannel][iCurrentHciPacketOffset + ANT_HCI_SIZE_OFFSET];
if ((iHciDataSize + ANT_HCI_HEADER_SIZE + ANT_HCI_FOOTER_SIZE + iCurrentHciPacketOffset) >
iRxLenRead) {
// we don't have a whole packet
iRxBufferLength[eChannel] = iRxLenRead - iCurrentHciPacketOffset;
memcpy(aucRxBuffer[eChannel], &aucRxBuffer[eChannel][iCurrentHciPacketOffset], iRxBufferLength[eChannel]);
// the increment at the end should push us out of the while loop
} else
#ifdef ANT_MESG_FLOW_CONTROL
if (aucRxBuffer[eChannel][iCurrentHciPacketOffset + ANT_HCI_DATA_OFFSET + ANT_MSG_ID_OFFSET] ==
ANT_MESG_FLOW_CONTROL) {
// This is a flow control packet, not a standard ANT message
if(setFlowControl(pstChnlInfo, \
aucRxBuffer[eChannel][iCurrentHciPacketOffset + ANT_HCI_DATA_OFFSET + ANT_MSG_DATA_OFFSET])) {
goto out;
}
} else
#endif // ANT_MESG_FLOW_CONTROL
{
ANT_U8 *msg = aucRxBuffer[eChannel] + iCurrentHciPacketOffset + ANT_HCI_DATA_OFFSET;
ANT_BOOL bIsKeepAliveResponse = memcmp(msg, KEEPALIVE_RESP, sizeof(KEEPALIVE_RESP)/sizeof(ANT_U8)) == 0;
if (bIsKeepAliveResponse) {
ANT_DEBUG_V("Filtered out keepalive response.");
} else if (pstChnlInfo->fnRxCallback != NULL) {
// Loop through read data until all HCI packets are written to callback
pstChnlInfo->fnRxCallback(iHciDataSize, \
msg);
} else {
ANT_WARN("%s rx callback is null", pstChnlInfo->pcDevicePath);
}
}
iCurrentHciPacketOffset = iCurrentHciPacketOffset + ANT_HCI_HEADER_SIZE + ANT_HCI_FOOTER_SIZE + iHciDataSize;
}
}
iRet = 0;
}
out:
ANT_FUNC_END();
return iRet;
}
