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* fhandler.h (class fhandler_serial): Add new members of

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the class - rts,dtr and method ioctl(). Variables rts and dtr
	important for Win 9x only.
	* fhandler_serial.cc (fhandler_serial::open): Add initial setting
	of dtr and rts. Important for Win 9x only.
	(fhandler_serial::ioctl): New function. Implements commands TIOCMGET,
	TIOCMSET and TIOCINQ.
	(fhandler_serial::tcflush): Fixed found error.
	(fhandler_serial::tcsetattr): Add settings of rts and dtr. Important
	for Win 9x only.
	* termios.h: Add new defines as a support for ioctl() function
	on serial device.
This commit is contained in:
Corinna Vinschen
2002-07-22 09:11:45 +00:00
parent 6b2ba9ad49
commit 780c42b43a
4 changed files with 168 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

132
winsup/cygwin/fhandler_serial.cc
View File

@ -268,6 +268,23 @@ fhandler_serial::open (path_conv *, int flags, mode_t mode)
system_printf ("couldn't set initial state for %s, %E", get_name ());
}
/* setting rts and dtr to known state so that ioctl() function with
request TIOCMGET could return correct value of RTS and DTR lines.
Important only for Win 9x systems */
if (wincap.is_winnt() == false)
{
if (EscapeCommFunction (get_handle (), SETDTR) == 0)
system_printf ("couldn't set initial state of DTR for %s, %E", get_name ());
if (EscapeCommFunction (get_handle (), SETRTS) == 0)
system_printf ("couldn't set initial state of RTS for %s, %E", get_name ());
/* even though one of above functions fail I have to set rts and dtr
variables to initial value. */
rts = TIOCM_RTS;
dtr = TIOCM_DTR;
}
SetCommMask (get_handle (), EV_RXCHAR);
set_open_status ();
syscall_printf ("%p = fhandler_serial::open (%s, %p, %p)",
@ -324,7 +341,7 @@ fhandler_serial::tcflow (int action)
DWORD win32action = 0;
DCB dcb;
char xchar;
termios_printf ("action %d", action);
switch (action)
@ -358,6 +375,107 @@ fhandler_serial::tcflow (int action)
return 0;
}
/* ioctl: */
int
fhandler_serial::ioctl (unsigned int cmd, void *buffer)
{
DWORD ev;
COMSTAT st;
DWORD action;
DWORD modemLines;
DWORD mcr;
DWORD cbReturned;
bool result;
int modemStatus;
int request;
request = *(int *) buffer;
action = 0;
modemStatus = 0;
if (!ClearCommError (get_handle (), &ev, &st))
return -1;
switch (cmd)
{
case TIOCMGET:
if (GetCommModemStatus (get_handle (), &modemLines) == 0)
return -1;
if (modemLines & MS_CTS_ON)
modemStatus |= TIOCM_CTS;
if (modemLines & MS_DSR_ON)
modemStatus |= TIOCM_DSR;
if (modemLines & MS_RING_ON)
modemStatus |= TIOCM_RI;
if (modemLines & MS_RLSD_ON)
modemStatus |= TIOCM_CD;
if (wincap.is_winnt() == true)
{
/* here is Windows NT or Windows 2000 part */
result = DeviceIoControl (get_handle (),
0x001B0078,
NULL, 0, &mcr, 4, &cbReturned, 0);
if (!result)
return -1;
if (cbReturned != 4)
return -1;
if (mcr & 2)
modemStatus |= TIOCM_RTS;
if (mcr & 1)
modemStatus |= TIOCM_DTR;
}
else
{
/* here is Windows 9x part */
modemStatus |= rts | dtr;
}
*(int *) buffer = modemStatus;
return 0;
case TIOCMSET:
if (request & TIOCM_RTS)
{
if (EscapeCommFunction (get_handle (), SETRTS) == 0)
return -1;
else
rts = TIOCM_RTS;
}
else
{
if (EscapeCommFunction (get_handle (), CLRRTS) == 0)
return -1;
else
rts = 0;
}
if (request & TIOCM_DTR)
{
if (EscapeCommFunction (get_handle (), SETDTR) == 0)
return -1;
else
dtr = TIOCM_DTR;
}
else
{
if (EscapeCommFunction (get_handle (), CLRDTR) == 0)
return -1;
else
dtr = 0;
}
return 0;
case TIOCINQ:
if (ev & CE_FRAME | ev & CE_IOE | ev & CE_OVERRUN |
ev & CE_RXOVER | ev & CE_RXPARITY)
return -1;
*(int *) buffer = st.cbInQue;
return 0;
default:
return -1;
}
}
/* tcflush: POSIX 7.2.2.1 */
int
fhandler_serial::tcflush (int queue)
@ -395,6 +513,8 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
COMMTIMEOUTS to;
DCB ostate, state;
unsigned int ovtime = vtime_, ovmin = vmin_;
int tmpDtr, tmpRts;
tmpDtr = tmpRts = 0;
termios_printf ("action %d", action);
if ((action == TCSADRAIN) || (action == TCSAFLUSH))
@ -560,6 +680,7 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
{ /* disable */
state.fRtsControl = RTS_CONTROL_ENABLE;
state.fOutxCtsFlow = FALSE;
tmpRts = TIOCM_RTS;
}
if (t->c_cflag & CRTSXOFF)
@ -592,7 +713,10 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
set_w_binary ((t->c_oflag & ONLCR) ? 0 : 1);
if (dropDTR == TRUE)
EscapeCommFunction (get_handle (), CLRDTR);
{
EscapeCommFunction (get_handle (), CLRDTR);
tmpDtr = 0;
}
else
{
/* FIXME: Sometimes when CLRDTR is set, setting
@ -601,7 +725,11 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
parameters while DTR is still down. */
EscapeCommFunction (get_handle (), SETDTR);
tmpDtr = TIOCM_DTR;
}
rts = tmpRts;
dtr = tmpDtr;
/*
The following documentation on was taken from "Linux Serial Programming