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- /* Serial interface for local (hardwired) serial ports on Un*x like systems
- Copyright 1992, 1993 Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "defs.h"
- #include "serial.h"
- #include <fcntl.h>
- #include <sys/types.h>
- #include <sys/time.h>
-
- #if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
- #define HAVE_SGTTY
- #endif
-
- #ifdef HAVE_TERMIOS
- #include <termios.h>
- #include <unistd.h>
- #endif
- #ifdef HAVE_TERMIO
- #include <termio.h>
- #endif
- #ifdef HAVE_SGTTY
- #include <sgtty.h>
- #endif
-
- static int hardwire_open PARAMS ((serial_t scb, const char *name));
- static void hardwire_raw PARAMS ((serial_t scb));
- static int wait_for PARAMS ((serial_t scb, int timeout));
- static int hardwire_readchar PARAMS ((serial_t scb, int timeout));
- static int rate_to_code PARAMS ((int rate));
- static int hardwire_setbaudrate PARAMS ((serial_t scb, int rate));
- static int hardwire_write PARAMS ((serial_t scb, const char *str, int len));
- static void hardwire_restore PARAMS ((serial_t scb));
- static void hardwire_close PARAMS ((serial_t scb));
-
- /* Open up a real live device for serial I/O */
-
- static int
- hardwire_open(scb, name)
- serial_t scb;
- const char *name;
- {
- scb->fd = open (name, O_RDWR);
- if (scb->fd < 0)
- return -1;
-
- return 0;
- }
-
- static void
- hardwire_raw(scb)
- serial_t scb;
- {
- #ifdef HAVE_TERMIOS
- struct termios termios;
-
- if (tcgetattr(scb->fd, &termios))
- {
- fprintf(stderr, "tcgetattr failed: %s\n", safe_strerror(errno));
- }
-
- termios.c_iflag = 0;
- termios.c_oflag = 0;
- termios.c_lflag = 0;
- termios.c_cflag &= ~(CSIZE|PARENB);
- termios.c_cflag |= CS8;
- termios.c_cc[VMIN] = 0;
- termios.c_cc[VTIME] = 0;
-
- if (tcsetattr(scb->fd, TCSANOW, &termios))
- {
- fprintf(stderr, "tcsetattr failed: %s\n", safe_strerror(errno));
- }
- #endif
-
- #ifdef HAVE_TERMIO
- struct termio termio;
-
- if (ioctl (scb->fd, TCGETA, &termio))
- {
- fprintf(stderr, "TCGETA failed: %s\n", safe_strerror(errno));
- }
-
- termio.c_iflag = 0;
- termio.c_oflag = 0;
- termio.c_lflag = 0;
- termio.c_cflag &= ~(CSIZE|PARENB);
- termio.c_cflag |= CS8;
- termio.c_cc[VMIN] = 0;
- termio.c_cc[VTIME] = 0;
-
- if (ioctl (scb->fd, TCSETA, &termio))
- {
- fprintf(stderr, "TCSETA failed: %s\n", safe_strerror(errno));
- }
- #endif
-
- #ifdef HAVE_SGTTY
- struct sgttyb sgttyb;
-
- if (ioctl (scb->fd, TIOCGETP, &sgttyb))
- fprintf(stderr, "TIOCGETP failed: %s\n", safe_strerror(errno));
-
- sgttyb.sg_flags |= RAW | ANYP;
- sgttyb.sg_flags &= ~(CBREAK | ECHO);
-
- if (ioctl (scb->fd, TIOCSETP, &sgttyb))
- fprintf(stderr, "TIOCSETP failed: %s\n", safe_strerror(errno));
- #endif
-
- scb->current_timeout = 0;
- }
-
- /* Wait for input on scb, with timeout seconds. Returns 0 on success,
- otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
-
- For termio{s}, we actually just setup VTIME if necessary, and let the
- timeout occur in the read() in hardwire_read().
- */
-
- static int
- wait_for(scb, timeout)
- serial_t scb;
- int timeout;
- {
- int numfds;
-
- #ifdef HAVE_SGTTY
- struct timeval tv;
- fd_set readfds;
-
- FD_ZERO (&readfds);
-
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
-
- FD_SET(scb->fd, &readfds);
-
- if (timeout >= 0)
- numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
- else
- numfds = select(scb->fd+1, &readfds, 0, 0, 0);
-
- if (numfds <= 0)
- if (numfds == 0)
- return SERIAL_TIMEOUT;
- else
- return SERIAL_ERROR; /* Got an error from select or poll */
-
- return 0;
-
- #endif /* HAVE_SGTTY */
-
- #if defined HAVE_TERMIO || defined HAVE_TERMIOS
- if (timeout == scb->current_timeout)
- return 0;
-
- {
- #ifdef HAVE_TERMIOS
- struct termios termios;
-
- if (tcgetattr(scb->fd, &termios))
- fprintf(stderr, "wait_for() tcgetattr failed: %s\n", safe_strerror(errno));
-
- termios.c_cc[VTIME] = timeout * 10;
-
- if (tcsetattr(scb->fd, TCSANOW, &termios))
- fprintf(stderr, "wait_for() tcsetattr failed: %s\n", safe_strerror(errno));
- #endif /* HAVE_TERMIOS */
-
- #ifdef HAVE_TERMIO
- struct termio termio;
-
- if (ioctl (scb->fd, TCGETA, &termio))
- fprintf(stderr, "wait_for() TCGETA failed: %s\n", safe_strerror(errno));
-
- termio.c_cc[VTIME] = timeout * 10;
-
- if (ioctl (scb->fd, TCSETA, &termio))
- fprintf(stderr, "TCSETA failed: %s\n", safe_strerror(errno));
- #endif /* HAVE_TERMIO */
-
- scb->current_timeout = timeout;
- return 0;
- }
- #endif /* HAVE_TERMIO || HAVE_TERMIOS */
- }
-
- /* Read a character with user-specified timeout. TIMEOUT is number of seconds
- to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
- char if successful. Returns -2 if timeout expired, EOF if line dropped
- dead, or -3 for any other error (see errno in that case). */
-
- static int
- hardwire_readchar(scb, timeout)
- serial_t scb;
- int timeout;
- {
- int status;
-
- if (scb->bufcnt-- > 0)
- return *scb->bufp++;
-
- status = wait_for(scb, timeout);
-
- if (status < 0)
- return status;
-
- scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ);
-
- if (scb->bufcnt <= 0)
- if (scb->bufcnt == 0)
- return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
- distinguish between EOF & timeouts
- someday] */
- else
- return SERIAL_ERROR; /* Got an error from read */
-
- scb->bufcnt--;
- scb->bufp = scb->buf;
- return *scb->bufp++;
- }
-
- #ifndef B19200
- #define B19200 EXTA
- #endif
-
- #ifndef B38400
- #define B38400 EXTB
- #endif
-
- /* Translate baud rates from integers to damn B_codes. Unix should
- have outgrown this crap years ago, but even POSIX wouldn't buck it. */
-
- static struct
- {
- int rate;
- int code;
- }
- baudtab[] =
- {
- {50, B50},
- {75, B75},
- {110, B110},
- {134, B134},
- {150, B150},
- {200, B200},
- {300, B300},
- {600, B600},
- {1200, B1200},
- {1800, B1800},
- {2400, B2400},
- {4800, B4800},
- {9600, B9600},
- {19200, B19200},
- {38400, B38400},
- {-1, -1},
- };
-
- static int
- rate_to_code(rate)
- int rate;
- {
- int i;
-
- for (i = 0; baudtab[i].rate != -1; i++)
- if (rate == baudtab[i].rate)
- return baudtab[i].code;
-
- return -1;
- }
-
- static int
- hardwire_setbaudrate(scb, rate)
- serial_t scb;
- int rate;
- {
- #ifdef HAVE_TERMIOS
- struct termios termios;
-
- if (tcgetattr (scb->fd, &termios))
- return -1;
-
- cfsetospeed (&termios, rate_to_code (rate));
- cfsetispeed (&termios, rate_to_code (rate));
-
- if (tcsetattr (scb->fd, TCSANOW, &termios))
- return -1;
- #endif
-
- #ifdef HAVE_TERMIO
- struct termio termio;
-
- if (ioctl (scb->fd, TCGETA, &termio))
- return -1;
-
- #ifndef CIBAUD
- #define CIBAUD CBAUD
- #endif
-
- termio.c_cflag &= ~(CBAUD | CIBAUD);
- termio.c_cflag |= rate_to_code (rate);
-
- if (ioctl (scb->fd, TCSETA, &termio))
- return -1;
- #endif
-
- #ifdef HAVE_SGTTY
- struct sgttyb sgttyb;
-
- if (ioctl (scb->fd, TIOCGETP, &sgttyb))
- return -1;
-
- sgttyb.sg_ispeed = rate_to_code (rate);
- sgttyb.sg_ospeed = rate_to_code (rate);
-
- if (ioctl (scb->fd, TIOCSETP, &sgttyb))
- return -1;
- #endif
- return 0;
- }
-
- static int
- hardwire_write(scb, str, len)
- serial_t scb;
- const char *str;
- int len;
- {
- int cc;
-
- while (len > 0)
- {
- cc = write(scb->fd, str, len);
-
- if (cc < 0)
- return 1;
- len -= cc;
- str += cc;
- }
- return 0;
- }
-
- static void
- hardwire_restore(scb)
- serial_t scb;
- {
- }
-
- static void
- hardwire_close(scb)
- serial_t scb;
- {
- if (scb->fd < 0)
- return;
-
- close(scb->fd);
- scb->fd = -1;
- }
-
- static struct serial_ops hardwire_ops =
- {
- "hardwire",
- 0,
- hardwire_open,
- hardwire_close,
- hardwire_readchar,
- hardwire_write,
- hardwire_raw,
- hardwire_restore,
- hardwire_setbaudrate
- };
-
- void
- _initialize_ser_hardwire ()
- {
- serial_add_interface (&hardwire_ops);
- }
-