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- #
- /*
- */
-
- /*
- * DC-11 driver
- */
- #include "../param.h"
- #include "../conf.h"
- #include "../user.h"
- #include "../tty.h"
- #include "../proc.h"
-
- /*
- * Base address of DC-11's. Minor device i is at
- * DCADDR + 10*i.
- */
- #define DCADDR 0174000
-
- /*
- * Number of DC's for which table space is allocated.
- */
- #define NDC11 14
-
- /*
- * Control bits in device registers
- */
- #define CDLEAD 01
- #define CARRIER 04
- #define SPEED1 010
- #define STOP1 0400
- #define RQSEND 01
- #define PARITY 040
- #define ERROR 0100000
- #define CTRANS 040000
- #define RINGIND 020000
-
-
- struct tty dc11[NDC11];
-
- struct dcregs {
- int dcrcsr;
- int dcrbuf;
- int dctcsr;
- int dctbuf;
- };
-
- /*
- * Input-side speed and control bit table.
- * Each DC11 has 4 speeds which correspond to the 4 non-zero entries.
- * The table index is the same as the speed-selector
- * number for the DH11.
- * Attempts to set the speed to a zero entry are ignored.
- */
- int dcrstab[] {
- 0, /* 0 baud */
- 0, /* 50 baud */
- 0, /* 75 baud */
- 0, /* 110 baud */
- 01101, /* 134.5 baud: 7b/ch, speed 0 */
- 0111, /* 150 baud: 8b/ch, speed 1 */
- 0, /* 200 baud */
- 0121, /* 300 baud: 8b/ch, speed 2 */
- 0, /* 600 baud */
- 0131, /* 1200 baud */
- 0, /* 1800 baud */
- 0, /* 2400 baud */
- 0, /* 4800 baud */
- 0, /* 9600 baud */
- 0, /* X0 */
- 0, /* X1 */
- };
-
- /*
- * Transmitter speed table
- */
- int dctstab[] {
- 0, /* 0 baud */
- 0, /* 50 baud */
- 0, /* 75 baud */
- 0, /* 110 baud */
- 0501, /* 134.5 baud: stop 1 */
- 0511, /* 150 baud */
- 0, /* 200 baud */
- 0521, /* 300 baud */
- 0, /* 600 baud */
- 0531, /* 1200 baud */
- 0, /* 1800 baud */
- 0, /* 2400 baud */
- 0, /* 4800 baud */
- 0, /* 9600 baud */
- 0, /* X0 */
- 0, /* X1 */
- };
-
- /*
- * Open a DC11, waiting until carrier is established.
- * Default initial conditions are set up on the first open.
- * t_state's CARR_ON bit is a pure copy of the hardware
- * CARRIER bit, and is only used to regularize
- * carrier tests in general tty routines.
- */
- dcopen(dev, flag)
- {
- register struct tty *rtp;
- register *addr;
-
- if (dev.d_minor >= NDC11) {
- u.u_error = ENXIO;
- return;
- }
- rtp = &dc11[dev.d_minor];
- rtp->t_addr = addr = DCADDR + dev.d_minor*8;
- rtp->t_state =| WOPEN;
- addr->dcrcsr =| IENABLE|CDLEAD;
- if ((rtp->t_state&ISOPEN) == 0) {
- rtp->t_erase = CERASE;
- rtp->t_kill = CKILL;
- addr->dcrcsr = IENABLE|CDLEAD|SPEED1;
- addr->dctcsr = IENABLE|SPEED1|STOP1|RQSEND;
- rtp->t_state = ISOPEN | WOPEN;
- rtp->t_flags = ODDP|EVENP|ECHO;
- }
- if (addr->dcrcsr & CARRIER)
- rtp->t_state =| CARR_ON;
- while ((rtp->t_state & CARR_ON) == 0)
- sleep(&rtp->t_rawq, TTIPRI);
- rtp->t_state =& ~WOPEN;
- if (u.u_procp->p_ttyp == 0) {
- u.u_procp->p_ttyp = rtp;
- rtp->t_dev = dev;
- }
- }
-
- /*
- * Close a dc11
- */
- dcclose(dev)
- {
- register struct tty *tp;
-
- (tp = &dc11[dev.d_minor])->t_state = 0;
- if (tp->t_flags&HUPCL)
- tp->t_addr->dcrcsr =& ~CDLEAD;
- wflushtty(tp);
- }
-
- /*
- * Read a DC11
- */
- dcread(dev)
- {
- ttread(&dc11[dev.d_minor]);
- }
-
- /*
- * Write a DC11
- */
- dcwrite(dev)
- {
- ttwrite(&dc11[dev.d_minor]);
- }
-
- /*
- * DC11 transmitter interrupt.
- */
- dcxint(dev)
- {
- register struct tty *tp;
-
- ttstart(tp = &dc11[dev.d_minor]);
- if (tp->t_outq.c_cc == 0 || tp->t_outq.c_cc == TTLOWAT)
- wakeup(&tp->t_outq);
- }
-
- /*
- * DC11 receiver interrupt.
- */
- dcrint(dev)
- {
- register struct tty *tp;
- register int c, csr;
-
- tp = &dc11[dev.d_minor];
- c = tp->t_addr->dcrbuf;
- /*
- * If carrier is off, and an open is not in progress,
- * knock down the CD lead to hang up the local dataset
- * and signal a hangup.
- */
- if (((csr = tp->t_addr->dcrcsr) & CARRIER) == 0) {
- if ((tp->t_state&WOPEN) == 0) {
- tp->t_addr->dcrcsr =& ~CDLEAD;
- if (tp->t_state & CARR_ON)
- signal(tp, SIGHUP);
- flushtty(tp);
- }
- tp->t_state =& ~CARR_ON;
- return;
- }
- if (csr&ERROR || (tp->t_state&ISOPEN)==0) {
- if (tp->t_state&WOPEN && csr&CARRIER)
- tp->t_state =| CARR_ON;
- wakeup(tp);
- return;
- }
- csr =& PARITY;
- if (csr&&(tp->t_flags&ODDP) || !csr&&(tp->t_flags&EVENP))
- ttyinput(c, tp);
- }
-
- /*
- * DC11 stty/gtty.
- * Perform general functions and set speeds.
- */
- dcsgtty(dev, av)
- int *av;
- {
- register struct tty *tp;
- register r;
-
- tp = &dc11[dev.d_minor];
- if (ttystty(tp, av))
- return;
- if (r = dcrstab[tp->t_speeds.lobyte&017])
- tp->t_addr->dcrcsr = r;
- else
- tp->t_addr->dcrcsr =& ~CDLEAD;
- if (r = dctstab[tp->t_speeds.hibyte&017])
- tp->t_addr->dctcsr = r;
- }
-