dev/arm/km.c

75 static int kmoutput(struct tty *tp);
76 static void kmstart(struct tty *tp);
93     struct tty *tp;
101     tp = km_tty[unit];
103     tty_lock(tp);
105     tp->t_oproc = kmstart;
106     tp->t_param = NULL;
107     tp->t_dev = dev;
109     if (!(tp->t_state & TS_ISOPEN)) {
110         tp->t_iflag = TTYDEF_IFLAG;
111         tp->t_oflag = TTYDEF_OFLAG;
112         tp->t_cflag = (CREAD | CS8 | CLOCAL);
113         tp->t_lflag = TTYDEF_LFLAG;
114         tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
115         termioschars(&tp->t_termios);
116         ttsetwater(tp);
117     } else if ((tp->t_state & TS_XCLUDE) && proc_suser(pp)) {
122     tp->t_state |= TS_CARR_ON;  /* lie and say carrier exists and is on. */
124     ret = ((*linesw[tp->t_line].l_open) (dev, tp));
127         wp = &tp->t_winsize;
135         tty_unlock(tp);         /* XXX race window */
143         tty_lock(tp);
155     tty_unlock(tp);
163     struct tty *tp = km_tty[minor(dev)];
165     tty_lock(tp);
166     ret = (*linesw[tp->t_line].l_close) (tp, flag);
167     ttyclose(tp);
168     tty_unlock(tp);
176     struct tty *tp = km_tty[minor(dev)];
178     tty_lock(tp);
179     ret = (*linesw[tp->t_line].l_read) (tp, uio, ioflag);
180     tty_unlock(tp);
188     struct tty *tp = km_tty[minor(dev)];
190     tty_lock(tp);
191     ret = (*linesw[tp->t_line].l_write) (tp, uio, ioflag);
192     tty_unlock(tp);
200     struct tty *tp = km_tty[minor(dev)];
203     tty_lock(tp);
208         *wp = tp->t_winsize;
246         error = (*linesw[tp->t_line].l_ioctl) (tp, cmd, data, flag, p);
249         error = ttioctl_locked(tp, cmd, data, flag, p);
253     tty_unlock(tp);
264  * Locks:       Assumes tp in the calling tty driver code is locked on
294  * Locks:	Assumes tp is locked on entry, remains locked on exit
296 static void kmstart(struct tty *tp)
298     if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
300     if (tp->t_outq.c_cc == 0)
302     tp->t_state |= TS_BUSY;
303     kmoutput(tp);
307     (*linesw[tp->t_line].l_start) (tp);
321     struct tty *tp = (struct tty *) arg;
323     tty_lock(tp);
324     (void) kmoutput(tp);
325     tty_unlock(tp);
331  * Locks:	Assumes tp is locked on entry, remains locked on exit
339 static int kmoutput(struct tty *tp)
348     while (tp->t_outq.c_cc > 0) {
349         cc = ndqb(&tp->t_outq, 0);
360         (void) q_to_b(&tp->t_outq, buf, cc);
365             kmputc(tp->t_dev, *cp & 0x7f);
372     if (tp->t_outq.c_cc > 0) {
373         timeout(kmtimeout, tp, hz);
375     tp->t_state &= ~TS_BUSY;
379     (*linesw[tp->t_line].l_start) (tp);
392  * Locks:       Assumes that the tty_lock() is NOT held on the tp, so a
400     struct tty *tp = km_tty[0]; /* XXX */
402     tty_lock(tp);
403     (*linesw[tp->t_line].l_rint) (ch, tp);
404     tty_unlock(tp);