404 lines
8.1 KiB
C
404 lines
8.1 KiB
C
/* Remote serial interface for local (hardwired) serial ports for Macintosh.
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Copyright 1994 Free Software Foundation, Inc.
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Contributed by Cygnus Support. Written by Stan Shebs.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "serial.h"
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#include <Types.h>
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#include <Devices.h>
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/* This is the regular Mac Serial.h, but copied to a different name
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so as not to get confused with the GDB serial.h above. */
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#include "MacSerial.h"
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/* This is unused for now. We just return a placeholder. */
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struct mac_ttystate
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{
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int bogus;
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};
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static int mac_open PARAMS ((serial_t scb, const char *name));
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static void mac_raw PARAMS ((serial_t scb));
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static int mac_readchar PARAMS ((serial_t scb, int timeout));
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static int mac_setbaudrate PARAMS ((serial_t scb, int rate));
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static int mac_write PARAMS ((serial_t scb, const char *str, int len));
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static void mac_close PARAMS ((serial_t scb));
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static serial_ttystate mac_get_tty_state PARAMS ((serial_t scb));
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static int mac_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
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static char *aptr PARAMS ((short p));
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short input_refnum;
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short output_refnum;
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char *mac_input_buffer;
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char *mac_output_buffer;
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static int
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mac_open (scb, name)
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serial_t scb;
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const char *name;
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{
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OSErr err;
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/* Alloc buffer space first - that way any allocation failures are
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intercepted before the serial driver gets involved. */
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if (mac_input_buffer == NULL)
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mac_input_buffer = (char *) xmalloc (4096);
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/* Match on a name and open a port. */
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if (strcmp (name, "modem") == 0)
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{
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err = OpenDriver ("\p.AIn", &input_refnum);
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if (err != 0)
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{
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return (-1);
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}
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err = OpenDriver ("\p.AOut", &output_refnum);
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if (err != 0)
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{
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CloseDriver (input_refnum);
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return (-1);
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}
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}
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else if (strcmp (name, "printer") == 0)
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{
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err = OpenDriver ("\p.BIn", &input_refnum);
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if (err != 0)
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{
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return (-1);
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}
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err = OpenDriver ("\p.BOut", &output_refnum);
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if (err != 0)
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{
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CloseDriver (input_refnum);
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return (-1);
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}
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/* fake */
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scb->fd = 1;
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return 0;
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}
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else
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{
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error ("You must specify a valid serial port name; your choices are `modem' or `printer'.");
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errno = ENOENT;
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return (-1);
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}
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/* We got something open. */
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if (1 /* using custom buffer */ )
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SerSetBuf (input_refnum, mac_input_buffer, 4096);
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/* Set to a GDB-preferred state. */
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SerReset (input_refnum, stop10 | noParity | data8 | baud9600);
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SerReset (output_refnum, stop10 | noParity | data8 | baud9600);
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{
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CntrlParam cb;
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struct SerShk *handshake;
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cb.ioCRefNum = output_refnum;
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cb.csCode = 14;
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handshake = (struct SerShk *) &cb.csParam[0];
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handshake->fXOn = 0;
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handshake->fCTS = 0;
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handshake->xOn = 0;
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handshake->xOff = 0;
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handshake->errs = 0;
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handshake->evts = 0;
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handshake->fInX = 0;
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handshake->fDTR = 0;
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err = PBControl ((ParmBlkPtr) & cb, 0);
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if (err < 0)
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return (-1);
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}
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/* fake */
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scb->fd = 1;
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return 0;
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}
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static int
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mac_noop (scb)
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serial_t scb;
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{
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return 0;
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}
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static void
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mac_raw (scb)
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serial_t scb;
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{
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/* Always effectively in raw mode. */
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}
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/* Read a character with user-specified timeout. TIMEOUT is number of seconds
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to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
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char if successful. Returns -2 if timeout expired, EOF if line dropped
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dead, or -3 for any other error (see errno in that case). */
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static int
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mac_readchar (scb, timeout)
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serial_t scb;
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int timeout;
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{
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int status, n;
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/* time_t */ unsigned long start_time, now;
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OSErr err;
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CntrlParam cb;
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IOParam pb;
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if (scb->bufcnt-- > 0)
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return *scb->bufp++;
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time (&start_time);
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while (1)
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{
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cb.ioCRefNum = input_refnum;
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cb.csCode = 2;
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err = PBStatus ((ParmBlkPtr) & cb, 0);
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if (err < 0)
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return SERIAL_ERROR;
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n = *((long *) &cb.csParam[0]);
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if (n > 0)
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{
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pb.ioRefNum = input_refnum;
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pb.ioBuffer = (Ptr) (scb->buf);
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pb.ioReqCount = (n > 64 ? 64 : n);
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err = PBRead ((ParmBlkPtr) & pb, 0);
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if (err < 0)
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return SERIAL_ERROR;
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scb->bufcnt = pb.ioReqCount;
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scb->bufcnt--;
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scb->bufp = scb->buf;
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return *scb->bufp++;
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}
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else if (timeout == 0)
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return SERIAL_TIMEOUT;
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else if (timeout == -1)
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;
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else
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{
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time (&now);
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if (now > start_time + timeout)
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return SERIAL_TIMEOUT;
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}
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PROGRESS (1);
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}
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}
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/* mac_{get set}_tty_state() are both dummys to fill out the function
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vector. Someday, they may do something real... */
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static serial_ttystate
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mac_get_tty_state (scb)
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serial_t scb;
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{
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struct mac_ttystate *state;
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state = (struct mac_ttystate *) xmalloc (sizeof *state);
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return (serial_ttystate) state;
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}
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static int
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mac_set_tty_state (scb, ttystate)
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serial_t scb;
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serial_ttystate ttystate;
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{
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return 0;
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}
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static int
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mac_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
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serial_t scb;
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serial_ttystate new_ttystate;
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serial_ttystate old_ttystate;
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{
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return 0;
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}
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static void
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mac_print_tty_state (serial_t scb,
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serial_ttystate ttystate,
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struct gdb_file *stream)
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{
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/* Nothing to print. */
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return;
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}
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/* If there is a tricky formula to relate real baud rates
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to what the serial driver wants, we should use it. Until
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we get one, this table will have to do. */
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static struct
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{
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int real_rate;
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int bits;
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}
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mac_baud_rate_table[] =
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{
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{
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57600, baud57600
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}
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,
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{
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38400, 1
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}
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,
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{
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19200, baud19200
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}
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,
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{
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9600, baud9600
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}
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,
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{
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7200, baud7200
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}
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,
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{
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4800, baud4800
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}
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,
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{
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3600, baud3600
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}
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,
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{
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2400, baud2400
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}
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,
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{
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1800, baud1800
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}
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,
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{
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1200, baud1200
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}
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,
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{
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600, baud600
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}
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,
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{
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300, baud300
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}
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,
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{
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0, 0
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}
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};
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static int
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mac_set_baud_rate (scb, rate)
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serial_t scb;
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int rate;
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{
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int i, bits;
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for (i = 0; mac_baud_rate_table[i].real_rate != 0; ++i)
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{
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if (mac_baud_rate_table[i].real_rate == rate)
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{
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bits = mac_baud_rate_table[i].bits;
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break;
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}
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}
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SerReset (input_refnum, stop10 | noParity | data8 | bits);
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SerReset (output_refnum, stop10 | noParity | data8 | bits);
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}
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static int
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mac_set_stop_bits (scb, num)
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serial_t scb;
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int num;
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{
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return 0;
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}
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int first_mac_write = 0;
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static int
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mac_write (scb, str, len)
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serial_t scb;
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const char *str;
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int len;
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{
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OSErr err;
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IOParam pb;
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if (first_mac_write++ < 4)
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{
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sleep (1);
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}
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pb.ioRefNum = output_refnum;
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pb.ioBuffer = (Ptr) str;
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pb.ioReqCount = len;
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err = PBWrite ((ParmBlkPtr) & pb, 0);
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if (err < 0)
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{
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return 1;
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}
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return 0;
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}
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static void
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mac_close (serial_t scb)
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{
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if (input_refnum)
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{
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if (1 /* custom buffer */ )
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SerSetBuf (input_refnum, mac_input_buffer, 0);
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CloseDriver (input_refnum);
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input_refnum = 0;
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}
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if (output_refnum)
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{
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if (0 /* custom buffer */ )
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SerSetBuf (input_refnum, mac_output_buffer, 0);
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CloseDriver (output_refnum);
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output_refnum = 0;
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}
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}
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static struct serial_ops mac_ops =
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{
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"hardwire",
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0,
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mac_open,
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mac_close,
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mac_readchar,
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mac_write,
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mac_noop, /* flush output */
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mac_noop, /* flush input */
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mac_noop, /* send break -- currently only for nindy */
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mac_raw,
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mac_get_tty_state,
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mac_set_tty_state,
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mac_print_tty_state,
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mac_noflush_set_tty_state,
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mac_set_baud_rate,
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mac_set_stop_bits,
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mac_noop, /* wait for output to drain */
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};
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void
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_initialize_ser_mac ()
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{
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serial_add_interface (&mac_ops);
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}
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