/*******************************************************************************
**
** Function select_read
**
** Description check if fd is ready for reading and listen for termination
** signal. need to use select in order to avoid collision
** between read and close on the same fd
**
** Returns -1: termination
** >=0: numbers of bytes read back from fd
**
*******************************************************************************/
static int select_read(int fd, uint8_t *pbuf, int len)
{
fd_set input;
int n = 0, ret = -1;
char reason = 0;
while (userial_running)
{
/* Initialize the input fd set */
FD_ZERO(&input);
if (rx_flow_on == TRUE)
{
FD_SET(fd, &input);
}
int fd_max = create_signal_fds(&input);
fd_max = fd_max > fd ? fd_max : fd;
/* Do the select */
n = select(fd_max+1, &input, NULL, NULL, NULL);
if(is_signaled(&input))
{
reason = reset_signal();
if (reason == USERIAL_RX_EXIT)
{
USERIALDBG("RX termination");
return -1;
}
else if (reason == USERIAL_RX_FLOW_OFF)
{
USERIALDBG("RX flow OFF");
rx_flow_on = FALSE;
}
else if (reason == USERIAL_RX_FLOW_ON)
{
USERIALDBG("RX flow ON");
rx_flow_on = TRUE;
}
}
if (n > 0)
{
/* We might have input */
if (FD_ISSET(fd, &input))
{
ret = read(fd, pbuf, (size_t)len);
if (0 == ret)
ALOGW( "read() returned 0!" );
return ret;
}
}
else if (n < 0)
ALOGW( "select() Failed");
else if (n == 0)
ALOGW( "Got a select() TIMEOUT");
}
return ret;
}
/*******************************************************************************
**
** Function userial_close
**
** Description Close the userial port
**
** Returns None
**
*******************************************************************************/
void userial_close(void)
{
int result;
TRANSAC p_buf;
USERIALDBG("userial_close(fd:%d)", userial_cb.fd);
if (userial_running)
send_wakeup_signal(USERIAL_RX_EXIT);
if ((result=pthread_join(userial_cb.read_thread, NULL)) < 0)
ALOGE( "pthread_join() FAILED result:%d", result);
/* Calling vendor-specific part */
if (bt_vnd_if)
bt_vnd_if->op(BT_VND_OP_USERIAL_CLOSE, NULL);
userial_cb.fd = -1;
if (bt_hc_cbacks)
{
while ((p_buf = utils_dequeue (&(userial_cb.rx_q))) != NULL)
{
bt_hc_cbacks->dealloc(p_buf, (char *) ((HC_BT_HDR *)p_buf+1));
}
}
}
/*******************************************************************************
**
** Function userial_init
**
** Description Initializes the userial driver
**
** Returns TRUE/FALSE
**
*******************************************************************************/
uint8_t userial_init(void)
{
USERIALDBG("userial_init");
memset(&userial_cb, 0, sizeof(tUSERIAL_CB));
userial_cb.fd = -1;
utils_queue_init(&(userial_cb.rx_q));
return TRUE;
}
/*******************************************************************************
**
** Function userial_init
**
** Description Initializes the userial driver
**
** Returns TRUE/FALSE
**
*******************************************************************************/
uint8_t userial_init(void)
{
int idx;
USERIALDBG("userial_init");
memset(&userial_cb, 0, sizeof(tUSERIAL_CB));
for (idx=0; idx < CH_MAX; idx++)
userial_cb.fd[idx] = -1;
utils_queue_init(&(userial_cb.rx_q));
return TRUE;
}
/*******************************************************************************
**
** Function userial_close
**
** Description Close the userial port
**
** Returns None
**
*******************************************************************************/
void userial_close(void)
{
int idx, result;
USERIALDBG("userial_close");
if (userial_running)
send_wakeup_signal(USERIAL_RX_EXIT);
if ((result=pthread_join(userial_cb.read_thread, NULL)) < 0)
ALOGE( "pthread_join() FAILED result:%d", result);
/* Calling vendor-specific part */
if (bt_vnd_if)
bt_vnd_if->op(BT_VND_OP_USERIAL_CLOSE, NULL);
for (idx=0; idx < CH_MAX; idx++)
userial_cb.fd[idx] = -1;
}
/*******************************************************************************
**
** Function userial_open
**
** Description Open Bluetooth device with the port ID
**
** Returns TRUE/FALSE
**
*******************************************************************************/
uint8_t userial_open(uint8_t port)
{
struct sched_param param;
int policy, result;
pthread_attr_t thread_attr;
USERIALDBG("userial_open(port:%d)", port);
if (userial_running)
{
/* Userial is open; close it first */
userial_close();
utils_delay(50);
}
if (port >= MAX_SERIAL_PORT)
{
ALOGE("Port > MAX_SERIAL_PORT");
return FALSE;
}
/* Calling vendor-specific part */
if (bt_vnd_if)
{
result = bt_vnd_if->op(BT_VND_OP_USERIAL_OPEN, &userial_cb.fd);
if ((result != 2) && (result != 4))
{
ALOGE("userial_open: wrong numbers of open fd in vendor lib [%d]!",
result);
ALOGE("userial_open: HCI MCT expects 2 or 4 open file descriptors");
bt_vnd_if->op(BT_VND_OP_USERIAL_CLOSE, NULL);
return FALSE;
}
}
else
{
ALOGE("userial_open: missing vendor lib interface !!!");
ALOGE("userial_open: unable to open BT transport");
return FALSE;
}
ALOGI("CMD=%d, EVT=%d, ACL_Out=%d, ACL_In=%d", \
userial_cb.fd[CH_CMD], userial_cb.fd[CH_EVT], \
userial_cb.fd[CH_ACL_OUT], userial_cb.fd[CH_ACL_IN]);
if ((userial_cb.fd[CH_CMD] == -1) || (userial_cb.fd[CH_EVT] == -1) ||
(userial_cb.fd[CH_ACL_OUT] == -1) || (userial_cb.fd[CH_ACL_IN] == -1))
{
ALOGE("userial_open: failed to open BT transport");
bt_vnd_if->op(BT_VND_OP_USERIAL_CLOSE, NULL);
return FALSE;
}
userial_cb.port = port;
/* Start listening thread */
pthread_attr_init(&thread_attr);
if (pthread_create(&(userial_cb.read_thread), &thread_attr, \
userial_read_thread, NULL) != 0 )
{
ALOGE("pthread_create failed!");
bt_vnd_if->op(BT_VND_OP_USERIAL_CLOSE, NULL);
return FALSE;
}
if(pthread_getschedparam(userial_cb.read_thread, &policy, ¶m)==0)
{
policy = BTHC_LINUX_BASE_POLICY;
#if (BTHC_LINUX_BASE_POLICY != SCHED_NORMAL)
param.sched_priority = BTHC_USERIAL_READ_THREAD_PRIORITY;
#else
param.sched_priority = 0;
#endif
result = pthread_setschedparam(userial_cb.read_thread, policy, ¶m);
if (result != 0)
{
ALOGW("userial_open: pthread_setschedparam failed (%s)", \
strerror(result));
}
}
return TRUE;
}
/*******************************************************************************
**
** Function userial_evt_read_thread
**
** Description The reading thread on EVT and ACL_IN channels
**
** Returns void *
**
*******************************************************************************/
static void *userial_read_thread(void *arg)
{
fd_set input;
int n;
char reason = 0;
USERIALDBG("Entering userial_read_thread()");
rx_flow_on = TRUE;
userial_running = 1;
raise_priority_a2dp(TASK_HIGH_USERIAL_READ);
while (userial_running)
{
/* Initialize the input fd set */
FD_ZERO(&input);
if (rx_flow_on == TRUE)
{
FD_SET(userial_cb.fd[CH_EVT], &input);
FD_SET(userial_cb.fd[CH_ACL_IN], &input);
}
int fd_max = create_signal_fds(&input);
fd_max = (fd_max>userial_cb.fd[CH_EVT]) ? fd_max : userial_cb.fd[CH_EVT];
fd_max = (fd_max>userial_cb.fd[CH_ACL_IN]) ? fd_max : userial_cb.fd[CH_ACL_IN];
/* Do the select */
n = 0;
n = select(fd_max+1, &input, NULL, NULL, NULL);
if(is_signaled(&input))
{
reason = reset_signal();
if (reason == USERIAL_RX_EXIT)
{
ALOGI("exiting userial_read_thread");
userial_running = 0;
break;
}
else if (reason == USERIAL_RX_FLOW_OFF)
{
USERIALDBG("RX flow OFF");
rx_flow_on = FALSE;
}
else if (reason == USERIAL_RX_FLOW_ON)
{
USERIALDBG("RX flow ON");
rx_flow_on = TRUE;
}
}
if (n > 0)
{
/* We might have input */
if (FD_ISSET(userial_cb.fd[CH_EVT], &input))
{
hci_mct_receive_evt_msg();
}
if (FD_ISSET(userial_cb.fd[CH_ACL_IN], &input))
{
hci_mct_receive_acl_msg();
}
}
else if (n < 0)
ALOGW( "select() Failed");
else if (n == 0)
ALOGW( "Got a select() TIMEOUT");
} /* while */
userial_running = 0;
USERIALDBG("Leaving userial_evt_read_thread()");
pthread_exit(NULL);
return NULL; // Compiler friendly
}
/*******************************************************************************
**
** Function userial_open
**
** Description Open Bluetooth device with the port ID
**
** Returns TRUE/FALSE
**
*******************************************************************************/
uint8_t userial_open(uint8_t port)
{
struct sched_param param;
int policy, result;
pthread_attr_t thread_attr;
int fd_array[CH_MAX];
USERIALDBG("userial_open(port:%d)", port);
if (userial_running)
{
/* Userial is open; close it first */
userial_close();
utils_delay(50);
}
if (port >= MAX_SERIAL_PORT)
{
ALOGE("Port > MAX_SERIAL_PORT");
return FALSE;
}
/* Calling vendor-specific part */
if (bt_vnd_if)
{
result = bt_vnd_if->op(BT_VND_OP_USERIAL_OPEN, &fd_array);
if (result != 1)
{
ALOGE("userial_open: wrong numbers of open fd in vendor lib [%d]!",
result);
ALOGE("userial_open: HCI UART expects only one open fd");
bt_vnd_if->op(BT_VND_OP_USERIAL_CLOSE, NULL);
return FALSE;
}
userial_cb.fd = fd_array[0];
}
else
{
ALOGE("userial_open: missing vendor lib interface !!!");
ALOGE("userial_open: unable to open UART port");
return FALSE;
}
if (userial_cb.fd == -1)
{
ALOGE("userial_open: failed to open UART port");
return FALSE;
}
USERIALDBG( "fd = %d", userial_cb.fd);
userial_cb.port = port;
pthread_attr_init(&thread_attr);
if (pthread_create(&(userial_cb.read_thread), &thread_attr, \
userial_read_thread, NULL) != 0 )
{
ALOGE("pthread_create failed!");
return FALSE;
}
if(pthread_getschedparam(userial_cb.read_thread, &policy, ¶m)==0)
{
policy = BTHC_LINUX_BASE_POLICY;
#if (BTHC_LINUX_BASE_POLICY!=SCHED_NORMAL)
param.sched_priority = BTHC_USERIAL_READ_THREAD_PRIORITY;
#endif
result = pthread_setschedparam(userial_cb.read_thread, policy, ¶m);
if (result != 0)
{
ALOGW("userial_open: pthread_setschedparam failed (%s)", \
strerror(result));
}
}
return TRUE;
}
/*******************************************************************************
**
** Function userial_read_thread
**
** Description
**
** Returns void *
**
*******************************************************************************/
static void *userial_read_thread(void *arg)
{
int rx_length = 0;
HC_BT_HDR *p_buf = NULL;
uint8_t *p;
USERIALDBG("Entering userial_read_thread()");
prctl(PR_SET_NAME, (unsigned long)"userial_read", 0, 0, 0);
rx_flow_on = TRUE;
userial_running = 1;
raise_priority_a2dp(TASK_HIGH_USERIAL_READ);
while (userial_running)
{
if (bt_hc_cbacks)
{
p_buf = (HC_BT_HDR *) bt_hc_cbacks->alloc( \
BTHC_USERIAL_READ_MEM_SIZE);
}
else
p_buf = NULL;
if (p_buf != NULL)
{
p_buf->offset = 0;
p_buf->layer_specific = 0;
p = (uint8_t *) (p_buf + 1);
rx_length = select_read(userial_cb.fd, p, READ_LIMIT);
}
else
{
rx_length = 0;
utils_delay(100);
ALOGW("userial_read_thread() failed to gain buffers");
continue;
}
if (rx_length > 0)
{
p_buf->len = (uint16_t)rx_length;
utils_enqueue(&(userial_cb.rx_q), p_buf);
bthc_signal_event(HC_EVENT_RX);
}
else /* either 0 or < 0 */
{
ALOGW("select_read return size <=0:%d, exiting userial_read_thread",\
rx_length);
/* if we get here, we should have a buffer */
bt_hc_cbacks->dealloc((TRANSAC) p_buf, (char *) (p_buf + 1));
/* negative value means exit thread */
break;
}
} /* for */
userial_running = 0;
USERIALDBG("Leaving userial_read_thread()");
pthread_exit(NULL);
return NULL; // Compiler friendly
}
