/*
EIBD eib bus access and management daemon
Copyright (C) 2005-2007 Martin Koegler <mkoegler@auto.tuwien.ac.at>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "tpuartserial.h"
/** get serial status lines */
static int
getstat (int fd)
{
int s;
ioctl (fd, TIOCMGET, &s);
return s;
}
/** set serial status lines */
static void
setstat (int fd, int s)
{
ioctl (fd, TIOCMSET, &s);
}
TPUARTSerialLayer2Driver::TPUARTSerialLayer2Driver (const char *dev,
eibaddr_t a, Trace * tr)
{
struct termios t1;
t = tr;
TRACEPRINTF (t, 2, this, "Open");
fd = open (dev, O_RDWR | O_NOCTTY | O_NDELAY | O_SYNC);
if (fd == -1)
throw Exception (DEV_OPEN_FAIL);
set_low_latency (fd, &sold);
close (fd);
fd = open (dev, O_RDWR | O_NOCTTY | O_SYNC);
if (fd == -1)
throw Exception (DEV_OPEN_FAIL);
tcgetattr (fd, &old);
t1.c_cflag = CS8 | CLOCAL | CREAD | PARENB;
t1.c_iflag = IGNBRK | INPCK | ISIG;
t1.c_oflag = 0;
t1.c_lflag = 0;
t1.c_cc[VTIME] = 1;
t1.c_cc[VMIN] = 0;
cfsetospeed (&t1, B19200);
cfsetispeed (&t1, 0);
tcsetattr (fd, TCSAFLUSH, &t1);
setstat (fd, (getstat (fd) & ~TIOCM_RTS) | TIOCM_DTR);
mode = 0;
vmode = 0;
addr = a;
indaddr.resize (1);
indaddr[0] = a;
pth_sem_init (&in_signal);
pth_sem_init (&out_signal);
getwait = pth_event (PTH_EVENT_SEM, &out_signal);
Start ();
TRACEPRINTF (t, 2, this, "Openend");
}
TPUARTSerialLayer2Driver::~TPUARTSerialLayer2Driver ()
{
TRACEPRINTF (t, 2, this, "Close");
Stop ();
pth_event_free (getwait, PTH_FREE_THIS);
while (!outqueue.isempty ())
delete outqueue.get ();
while (!inqueue.isempty ())
delete inqueue.get ();
if (fd != -1)
{
setstat (fd, (getstat (fd) & ~TIOCM_RTS) & ~TIOCM_DTR);
tcsetattr (fd, TCSAFLUSH, &old);
restore_low_latency (fd, &sold);
close (fd);
}
}
bool
TPUARTSerialLayer2Driver::addAddress (eibaddr_t addr)
{
unsigned i;
for (i = 0; i < indaddr (); i++)
if (indaddr[i] == addr)
return 0;
indaddr.resize (indaddr () + 1);
indaddr[indaddr () - 1] = addr;
return 1;
}
bool
TPUARTSerialLayer2Driver::addGroupAddress (eibaddr_t addr)
{
unsigned i;
for (i = 0; i < groupaddr (); i++)
if (groupaddr[i] == addr)
return 0;
groupaddr.resize (groupaddr () + 1);
groupaddr[groupaddr () - 1] = addr;
return 1;
}
bool
TPUARTSerialLayer2Driver::removeAddress (eibaddr_t addr)
{
unsigned i;
for (i = 0; i < indaddr (); i++)
if (indaddr[i] == addr)
{
indaddr.deletepart (i, 1);
return 1;
}
return 0;
}
bool
TPUARTSerialLayer2Driver::removeGroupAddress (eibaddr_t addr)
{
unsigned i;
for (i = 0; i < groupaddr (); i++)
if (groupaddr[i] == addr)
{
groupaddr.deletepart (i, 1);
return 1;
}
return 0;
}
bool TPUARTSerialLayer2Driver::openVBusmonitor ()
{
vmode = 1;
return 1;
}
bool TPUARTSerialLayer2Driver::closeVBusmonitor ()
{
vmode = 0;
return 1;
}
eibaddr_t
TPUARTSerialLayer2Driver::getDefaultAddr ()
{
return addr;
}
bool
TPUARTSerialLayer2Driver::Connection_Lost ()
{
return 0;
}
bool
TPUARTSerialLayer2Driver::Send_Queue_Empty ()
{
return inqueue.isempty ();
}
void
TPUARTSerialLayer2Driver::Send_L_Data (LPDU * l)
{
TRACEPRINTF (t, 2, this, "Send %s", l->Decode ()());
inqueue.put (l);
pth_sem_inc (&in_signal, 1);
}
LPDU *
TPUARTSerialLayer2Driver::Get_L_Data (pth_event_t stop)
{
if (stop != NULL)
pth_event_concat (getwait, stop, NULL);
pth_wait (getwait);
if (stop)
pth_event_isolate (getwait);
if (pth_event_status (getwait) == PTH_STATUS_OCCURRED)
{
pth_sem_dec (&out_signal);
LPDU *l = outqueue.get ();
TRACEPRINTF (t, 2, this, "Recv %s", l->Decode ()());
return l;
}
else
return 0;
}
//Open
bool
TPUARTSerialLayer2Driver::enterBusmonitor ()
{
uchar c = 0x05;
t->TracePacket (2, this, "openBusmonitor", 1, &c);
write (fd, &c, 1);
mode = 1;
return 1;
}
bool
TPUARTSerialLayer2Driver::leaveBusmonitor ()
{
uchar c = 0x01;
t->TracePacket (2, this, "leaveBusmonitor", 1, &c);
write (fd, &c, 1);
mode = 0;
return 1;
}
bool
TPUARTSerialLayer2Driver::Open ()
{
uchar c = 0x01;
t->TracePacket (2, this, "open-reset", 1, &c);
write (fd, &c, 1);
return 1;
}
bool
TPUARTSerialLayer2Driver::Close ()
{
return 1;
}
void
TPUARTSerialLayer2Driver::RecvLPDU (const uchar * data, int len)
{
t->TracePacket (1, this, "Recv", len, data);
if (mode || vmode)
{
L_Busmonitor_PDU *l = new L_Busmonitor_PDU;
l->pdu.set (data, len);
outqueue.put (l);
pth_sem_inc (&out_signal, 1);
}
if (!mode)
{
LPDU *l = LPDU::fromPacket (CArray (data, len));
if (l->getType () == L_Data && ((L_Data_PDU *) l)->valid_checksum)
{
outqueue.put (l);
pth_sem_inc (&out_signal, 1);
}
else
delete l;
}
}
void
TPUARTSerialLayer2Driver::Run (pth_sem_t * stop1)
{
uchar buf[255];
int i;
CArray in;
int to = 0;
int waitconfirm = 0;
int acked = 0;
int retry = 0;
int watch = 0;
pth_event_t stop = pth_event (PTH_EVENT_SEM, stop1);
pth_event_t input = pth_event (PTH_EVENT_SEM, &in_signal);
pth_event_t timeout = pth_event (PTH_EVENT_TIME, pth_timeout (0, 0));
pth_event_t watchdog = pth_event (PTH_EVENT_TIME, pth_timeout (0, 0));
pth_event_t sendtimeout = pth_event (PTH_EVENT_TIME, pth_timeout (0, 0));
while (pth_event_status (stop) != PTH_STATUS_OCCURRED)
{
if (in () == 0 && !waitconfirm)
pth_event_concat (stop, input, NULL);
if (to)
pth_event_concat (stop, timeout, NULL);
if (waitconfirm)
pth_event_concat (stop, sendtimeout, NULL);
if (watch)
pth_event_concat (stop, watchdog, NULL);
i = pth_read_ev (fd, buf, sizeof (buf), stop);
pth_event_isolate (stop);
pth_event_isolate (timeout);
pth_event_isolate (sendtimeout);
pth_event_isolate (watchdog);
if (i > 0)
{
t->TracePacket (0, this, "Recv", i, buf);
in.setpart (buf, in (), i);
}
while (in () > 0)
{
if (in[0] == 0x8B)
{
if (waitconfirm)
{
waitconfirm = 0;
delete inqueue.get ();
pth_sem_dec (&in_signal);
retry = 0;
}
in.deletepart (0, 1);
}
else if (in[0] == 0x0B)
{
if (waitconfirm)
{
retry++;
waitconfirm = 0;
TRACEPRINTF (t, 0, this, "NACK");
if (retry > 3)
{
TRACEPRINTF (t, 0, this, "Drop NACK");
delete inqueue.get ();
pth_sem_dec (&in_signal);
retry = 0;
}
}
in.deletepart (0, 1);
}
else if ((in[0] & 0x07) == 0x07)
{
TRACEPRINTF (t, 0, this, "RecvWatchdog: %02X", in[0]);
watch = 2;
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, watchdog,
pth_timeout (10, 0));
in.deletepart (0, 1);
}
else if (in[0] == 0xCC || in[0] == 0xC0 || in[0] == 0x0C)
{
RecvLPDU (in.array (), 1);
in.deletepart (0, 1);
}
else if ((in[0] & 0xD0) == 0x90)
{
if (in () < 6)
{
if (!to)
{
to = 1;
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, timeout,
pth_timeout (0, 300000));
}
if (pth_event_status (timeout) != PTH_STATUS_OCCURRED)
break;
TRACEPRINTF (t, 0, this, "Remove1 %02X", in[0]);
in.deletepart (0, 1);
continue;
}
if (!acked)
{
uchar c = 0x10;
if ((in[5] & 0x80) == 0)
{
for (unsigned i = 0; i < indaddr (); i++)
if (indaddr[i] == (in[3] << 8) | in[4])
c |= 0x1;
}
else
{
for (unsigned i = 0; i < groupaddr (); i++)
if (groupaddr[i] == (in[3] << 8) | in[4])
c |= 0x1;
}
TRACEPRINTF (t, 0, this, "SendAck %02X", c);
pth_write_ev (fd, &c, 1, stop);
acked = 1;
}
unsigned len = in[5] & 0x0f;
len += 6 + 2;
if (in () < len)
{
if (!to)
{
to = 1;
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, timeout,
pth_timeout (0, 300000));
}
if (pth_event_status (timeout) != PTH_STATUS_OCCURRED)
break;
TRACEPRINTF (t, 0, this, "Remove2 %02X", in[0]);
in.deletepart (0, 1);
continue;
}
acked = 0;
RecvLPDU (in.array (), len);
in.deletepart (0, len);
}
else if ((in[0] & 0xD0) == 0x10)
{
if (in () < 7)
{
if (!to)
{
to = 1;
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, timeout,
pth_timeout (0, 300000));
}
if (pth_event_status (timeout) != PTH_STATUS_OCCURRED)
break;
TRACEPRINTF (t, 0, this, "Remove1 %02X", in[0]);
in.deletepart (0, 1);
continue;
}
if (!acked)
{
uchar c = 0x10;
if ((in[1] & 0x80) == 0)
{
for (unsigned i = 0; i < indaddr (); i++)
if (indaddr[i] == (in[4] << 8) | in[5])
c |= 0x1;
}
else
{
for (unsigned i = 0; i < groupaddr (); i++)
if (groupaddr[i] == (in[4] << 8) | in[5])
c |= 0x1;
}
TRACEPRINTF (t, 0, this, "SendAck %02X", c);
pth_write_ev (fd, &c, 1, stop);
acked = 1;
}
unsigned len = in[6] & 0xff;
len += 7 + 2;
if (in () < len)
{
if (!to)
{
to = 1;
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, timeout,
pth_timeout (0, 300000));
}
if (pth_event_status (timeout) != PTH_STATUS_OCCURRED)
break;
TRACEPRINTF (t, 0, this, "Remove2 %02X", in[0]);
in.deletepart (0, 1);
continue;
}
acked = 0;
RecvLPDU (in.array (), len);
in.deletepart (0, len);
}
else
{
acked = 0;
TRACEPRINTF (t, 0, this, "Remove %02X", in[0]);
in.deletepart (0, 1);
}
to = 0;
}
if (waitconfirm
&& pth_event_status (sendtimeout) == PTH_STATUS_OCCURRED)
{
retry++;
waitconfirm = 0;
if (retry >= 3)
{
TRACEPRINTF (t, 0, this, "Drop Send");
delete inqueue.get ();
pth_sem_dec (&in_signal);
}
}
if (watch == 1 && pth_event_status (watchdog) == PTH_STATUS_OCCURRED)
{
uchar c = 0x01;
t->TracePacket (2, this, "Watchdog Reset", 1, &c);
write (fd, &c, 1);
watch = 0;
}
if (watch == 2 && pth_event_status (watchdog) == PTH_STATUS_OCCURRED)
watch = 0;
if (in () == 0 && !inqueue.isempty () && !waitconfirm)
{
LPDU *l = (LPDU *) inqueue.top ();
CArray d = l->ToPacket ();
CArray w;
unsigned i;
int j;
w.resize (d () * 2);
for (i = 0; i < d (); i++)
{
w[2 * i] = 0x80 | (i & 0x3f);
w[2 * i + 1] = d[i];
}
w[(d () * 2) - 2] = (w[(d () * 2) - 2] & 0x3f) | 0x40;
t->TracePacket (0, this, "Write", w);
j = pth_write_ev (fd, w.array (), w (), stop);
waitconfirm = 1;
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, sendtimeout,
pth_timeout (0, 600000));
}
else if (in () == 0 && !waitconfirm && !watch && mode == 0 && !to)
{
pth_event (PTH_EVENT_TIME | PTH_MODE_REUSE, watchdog,
pth_timeout (10, 0));
watch = 1;
uchar c = 0x02;
t->TracePacket (2, this, "Watchdog Status", 1, &c);
write (fd, &c, 1);
}
}
pth_event_free (stop, PTH_FREE_THIS);
pth_event_free (input, PTH_FREE_THIS);
pth_event_free (timeout, PTH_FREE_THIS);
pth_event_free (watchdog, PTH_FREE_THIS);
pth_event_free (sendtimeout, PTH_FREE_THIS);
}
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