187 lines
3.4 KiB
C
187 lines
3.4 KiB
C
#include "sys/param.h"
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#include "sys/proc.h"
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#include "sys/systm.h"
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#include "sys/buf.h"
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#include "sys/ioctl.h"
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#include "sys/tty.h"
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#include "sys/file.h"
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#include "sys/conf.h"
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#include "mon.h"
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#include "../sun3/cons.h"
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#include "prom.h"
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struct prom_softc {
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int flags;
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int nopen;
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struct tty t;
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} prom_softc[NPROM];
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#if NPROM > 1
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#error "Can't configure more than one prom tty"
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#endif
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promopen(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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struct tty *tp;
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struct prom_softc *prom;
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int unit;
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int s,error=0;
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unit = UNIT(dev);
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if (unit >= NCOM)
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return ENXIO;
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prom = &prom_softc[unit];
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bzero(&prom->t, sizeof(struct tty));
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tp = &prom->t;
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tp->t_oproc = promstart;
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tp->t_dev = dev;
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if ((tp->t_state & TS_ISOPEN) == 0) {
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tp->t_state |= TS_WOPEN;
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ttychars(tp);
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if (tp->t_ispeed == 0) {
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_cflag = TTYDEF_CFLAG;
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tp->t_lflag = TTYDEF_LFLAG;
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tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
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}
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ttsetwater(tp);
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}
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else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0)
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return (EBUSY);
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s = spltty();
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while ((flag&O_NONBLOCK) == 0 && (tp->t_cflag&CLOCAL) == 0 &&
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(tp->t_state & TS_CARR_ON) == 0) {
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tp->t_state |= TS_WOPEN;
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if (error = ttysleep(tp, (caddr_t)&tp->t_raw, TTIPRI | PCATCH,
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ttopen, 0))
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break;
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}
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splx(s);
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if (error == 0)
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error = (*linesw[tp->t_line].l_open)(dev, tp);
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return (error);
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}
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promclose(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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struct tty *tp;
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unit = UNIT(dev);
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if (unit >= NCOM)
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return ENXIO;
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prom = &prom_softc[unit];
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tp = &prom->t;
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(*linesw[tp->t_line].l_close)(tp, flag);
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ttyclose(tp);
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return 0;
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}
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promread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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{
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register struct tty *tp = &prom_softc[UNIT(dev)]->t;
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return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
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}
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promwrite(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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{
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register struct tty *tp = &prom_softc[UNIT(dev)]->t;
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return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
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}
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promcnprobe(cp)
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struct consdev *cp;
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{
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/* locate the major number */
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for (prommajor = 0; prommajor < nchrdev; prommajor++)
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if (cdevsw[prommajor].d_open == promopen)
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break;
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cp->cn_dev = makedev(prommajor, 0);
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cp->cn_pri = CN_NORMAL; /* will always exist but you don't
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* want to use it unless you have to
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*/
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}
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static void
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promstart(tp)
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struct tty *tp;
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{
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int s;
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s = spltty();
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if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
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splx(s);
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return;
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}
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if (RB_LEN(&tp->t_out) <= tp->t_lowat) {
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if (tp->t_state&TS_ASLEEP) {
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tp->t_state &= ~TS_ASLEEP;
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wakeup((caddr_t)&tp->t_out);
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}
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selwakeup(&tp->t_wsel);
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}
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if (RB_LEN(&tp->t_out) == 0)
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goto out;
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c = rbgetc(&tp->t_out);
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tp->t_state |= TS_BUSY;
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mon_putchar(c);
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splx(s);
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}
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/*
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* Stop output on a line.
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*/
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promstop(tp, flag)
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register struct tty *tp;
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{
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register int s;
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s = spltty();
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if (tp->t_state & TS_BUSY) {
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if ((tp->t_state&TS_TTSTOP)==0)
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tp->t_state |= TS_FLUSH;
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}
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splx(s);
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}
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promcninit(cp)
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struct consdev *cp;
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{
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mon_printf("prom\n");
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}
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promcngetc(dev)
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dev_t dev;
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{
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mon_printf("not sure how to do promcngetc()\n yet");
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}
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/*
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* Console kernel output character routine.
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*/
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promcnputc(c)
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int c;
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{
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mon_putchar(c);
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}
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