dist/gdb/ser-go32.c

169 /* Main interrupt controller port addresses.  */
183     struct dos_ttystate *port;
247 dos_getc (volatile struct dos_ttystate *port)
251   if (port->count == 0)
254   c = port->cbuf[port->first];
256   port->first = (port->first + 1) & (CBSIZE - 1);
257   port->count--;
264 dos_putc (int c, struct dos_ttystate *port)
266   if (port->count >= CBSIZE - 1)
268   port->cbuf[(port->first + port->count) & (CBSIZE - 1)] = c;
269   port->count++;
279   struct dos_ttystate *port;
288   port = intrupts[irq].port;
289   if (!port)
297       iir = inb (port, com_iir) & IIR_IMASK;
302 	  lsr = inb (port, com_lsr);
312 	      c = inb (port, com_data);
316 		    port->ferr++;
318 		    port->perr++;
320 		    port->oflo++;
323 	      if (dos_putc (c, port) < 0)
332 	  while ((lsr = inb (port, com_lsr)) & LSR_RXRDY);
337 	  port->msr = inb (port, com_msr);
341 	  port->txbusy = 0;
460   struct dos_ttystate *port;
485   port = &ports[fd];
486   if (port->refcnt++ > 0)
494   outb (port, com_cfcr, 0);
495   outb (port, com_iir, 0);
498       if ((inb (port, com_iir) & 0x38) == 0)
500       (void) inb (port, com_data);	/* clear recv */
507   outb (port, com_ier, 0);
510   outb (port, com_fifo,
513   port->fifo = ((inb (port, com_iir) & IIR_FIFO_MASK) == IIR_FIFO_MASK);
516   (void) inb (port, com_lsr);
517   (void) inb (port, com_msr);
520   outb (port, com_mcr, MCR_IENABLE);
523   port->intrupt = dos_hookirq (port->irq);
524   if (!port->intrupt)
526       outb (port, com_mcr, 0);
527       outb (port, com_fifo, 0);
534   /* record port */
535   port->intrupt->port = port;
539   port->first = port->count = 0;
540   port->txbusy = 0;
541   port->oflo = 0;
544   i = dos_baudconv (port->baudrate = 9600);
545   outb (port, com_cfcr, CFCR_DLAB);
546   outb (port, com_dlbl, i & 0xff);
547   outb (port, com_dlbh, i >> 8);
548   outb (port, com_cfcr, CFCR_8BITS);
551   outb (port, com_ier, IER_ETXRDY | IER_ERXRDY | IER_ERLS | IER_EMSC);
554   outb (port, com_mcr, MCR_DTR | MCR_RTS | MCR_IENABLE);
565   struct dos_ttystate *port;
571   port = &ports[scb->fd];
573   if (port->refcnt-- > 1)
576   if (!(intrupt = port->intrupt))
581   port->intrupt = 0;
582   intrupt->port = 0;
583   outb (port, com_fifo, 0);
584   outb (port, com_ier, 0);
589   outb (port, com_mcr, 0);
592   if (port->oflo)
597 			  port->fifo ? "cannot" : "needs a 16550 to",
598 			  port->baudrate);
620   struct dos_ttystate *port = &ports[scb->fd];
625   while ((c = dos_getc (port)) < 0)
638   struct dos_ttystate *port = &ports[scb->fd];
641   /* Are they asking about a port we opened?  */
642   if (port->refcnt <= 0)
644       /* We've never heard about this port.  We should fail this call,
655   *state = *port;
694   struct dos_ttystate *port = &ports[scb->fd];
697   port->first = port->count = 0;
698   if (port->fifo)
699     outb (port, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_TRIGGER);
738   struct dos_ttystate *port = &ports[scb->fd];
740   if (port->baudrate != rate)
754       cfcr = inb (port, com_cfcr);
756       outb (port, com_cfcr, CFCR_DLAB);
757       outb (port, com_dlbl, x & 0xff);
758       outb (port, com_dlbh, x >> 8);
759       outb (port, com_cfcr, cfcr);
760       port->baudrate = rate;
770   struct dos_ttystate *port = &ports[scb->fd];
774   cfcr = inb (port, com_cfcr);
779       outb (port, com_cfcr, cfcr & ~CFCR_STOPB);
783       outb (port, com_cfcr, cfcr | CFCR_STOPB);
797   volatile struct dos_ttystate *port = &ports[scb->fd];
798   int fifosize = port->fifo ? 16 : 1;
806       port->txbusy = 1;
810       outportsb (port->base + com_data, str, cnt);
815 	outportb (port->base + com_data, *str++);
822       while (port->txbusy)
838   volatile struct dos_ttystate *port = &ports[scb->fd];
842   cfcr = inb (port, com_cfcr);
843   outb (port, com_cfcr, cfcr | CFCR_SBREAK);
850   outb (port, com_cfcr, cfcr);
890   struct dos_ttystate *port;
895   for (port = ports; port < &ports[4]; port++)
897       if (port->baudrate == 0)
899       printf_filtered ("Port:\tCOM%ld (%sactive)\n", (long)(port - ports) + 1,
900 		       port->intrupt ? "" : "not ");
901       printf_filtered ("Addr:\t0x%03x (irq %d)\n", port->base, port->irq);
902       printf_filtered ("16550:\t%s\n", port->fifo ? "yes" : "no");
903       printf_filtered ("Speed:\t%d baud\n", port->baudrate);
905 		       port->ferr, port->perr, port->oflo);
931 Set COM1 base i/o port address."), _("\
932 Show COM1 base i/o port address."), NULL,
945 Set COM2 base i/o port address."), _("\
946 Show COM2 base i/o port address."), NULL,
959 Set COM3 base i/o port address."), _("\
960 Show COM3 base i/o port address."), NULL,
973 Set COM4 base i/o port address."), _("\
974 Show COM4 base i/o port address."), NULL,
987 	    _("Print DOS serial port status."));