a121cb6a7f
after configure() has run. Only create the device if ofwcons is the highest priority console. Make a dev alias with the same name as the firmware output-device property.
326 lines
6.5 KiB
C
326 lines
6.5 KiB
C
/*
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* Copyright (C) 2001 Benno Rice.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/conf.h>
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#include <sys/cons.h>
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#include <sys/consio.h>
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#include <sys/tty.h>
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#include <dev/ofw/openfirm.h>
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#define OFW_POLL_HZ 4
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static d_open_t ofw_dev_open;
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static d_close_t ofw_dev_close;
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static d_ioctl_t ofw_dev_ioctl;
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#define CDEV_MAJOR 97
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static struct cdevsw ofw_cdevsw = {
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/* open */ ofw_dev_open,
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/* close */ ofw_dev_close,
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/* read */ ttyread,
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/* write */ ttywrite,
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/* ioctl */ ofw_dev_ioctl,
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/* poll */ ttypoll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "ofw",
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/* major */ CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ 0,
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};
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static struct tty *ofw_tp = NULL;
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static int polltime;
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static struct callout_handle ofw_timeouthandle
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= CALLOUT_HANDLE_INITIALIZER(&ofw_timeouthandle);
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static void ofw_tty_start(struct tty *);
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static int ofw_tty_param(struct tty *, struct termios *);
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static void ofw_tty_stop(struct tty *, int);
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static void ofw_timeout(void *);
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static cn_probe_t ofw_cons_probe;
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static cn_init_t ofw_cons_init;
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static cn_getc_t ofw_cons_getc;
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static cn_checkc_t ofw_cons_checkc;
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static cn_putc_t ofw_cons_putc;
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CONS_DRIVER(ofw, ofw_cons_probe, ofw_cons_init, NULL, ofw_cons_getc,
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ofw_cons_checkc, ofw_cons_putc, NULL);
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static void
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cn_drvinit(void *unused)
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{
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phandle_t options;
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char output[32];
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if (ofw_consdev.cn_dev != NULL) {
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if ((options = OF_finddevice("/options")) == -1 ||
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OF_getprop(options, "output-device", output,
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sizeof(output)) == -1)
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return;
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make_dev(&ofw_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "ofwcons");
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make_dev_alias(ofw_consdev.cn_dev, "%s", output);
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}
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}
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SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE + CDEV_MAJOR, cn_drvinit, NULL)
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static int stdin;
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static int stdout;
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static int
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ofw_dev_open(dev_t dev, int flag, int mode, struct thread *td)
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{
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struct tty *tp;
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int unit;
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int error, setuptimeout;
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error = 0;
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setuptimeout = 0;
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unit = minor(dev);
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tp = ofw_tp = dev->si_tty = ttymalloc(ofw_tp);
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tp->t_oproc = ofw_tty_start;
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tp->t_param = ofw_tty_param;
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tp->t_stop = ofw_tty_stop;
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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_CARR_ON;
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ttychars(tp);
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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|CLOCAL;
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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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ttsetwater(tp);
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setuptimeout = 1;
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} else if ((tp->t_state & TS_XCLUDE) && suser(td)) {
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return (EBUSY);
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}
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error = (*linesw[tp->t_line].l_open)(dev, tp);
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if (error == 0 && setuptimeout) {
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polltime = hz / OFW_POLL_HZ;
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if (polltime < 1) {
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polltime = 1;
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}
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ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
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}
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return (error);
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}
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static int
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ofw_dev_close(dev_t dev, int flag, int mode, struct thread *td)
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{
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int unit;
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struct tty *tp;
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unit = minor(dev);
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tp = ofw_tp;
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if (unit != 0) {
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return (ENXIO);
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}
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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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static int
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ofw_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
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{
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int unit;
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struct tty *tp;
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int error;
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unit = minor(dev);
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tp = ofw_tp;
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if (unit != 0) {
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return (ENXIO);
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}
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error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td);
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if (error != ENOIOCTL) {
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return (error);
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}
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error = ttioctl(tp, cmd, data, flag);
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if (error != ENOIOCTL) {
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return (error);
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}
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return (ENOTTY);
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}
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static int
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ofw_tty_param(struct tty *tp, struct termios *t)
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{
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return (0);
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}
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static void
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ofw_tty_start(struct tty *tp)
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{
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if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
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ttwwakeup(tp);
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return;
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}
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tp->t_state |= TS_BUSY;
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while (tp->t_outq.c_cc != 0) {
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ofw_cons_putc(tp->t_dev, getc(&tp->t_outq));
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}
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tp->t_state &= ~TS_BUSY;
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ttwwakeup(tp);
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}
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static void
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ofw_tty_stop(struct tty *tp, int flag)
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{
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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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}
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}
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static void
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ofw_timeout(void *v)
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{
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struct tty *tp;
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int c;
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tp = (struct tty *)v;
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while ((c = ofw_cons_checkc(tp->t_dev)) != -1) {
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if (tp->t_state & TS_ISOPEN) {
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(*linesw[tp->t_line].l_rint)(c, tp);
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}
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}
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ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
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}
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static void
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ofw_cons_probe(struct consdev *cp)
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{
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int chosen;
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if ((chosen = OF_finddevice("/chosen")) == -1) {
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cp->cn_pri = CN_DEAD;
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return;
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}
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if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) {
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cp->cn_pri = CN_DEAD;
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return;
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}
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if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) {
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cp->cn_pri = CN_DEAD;
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return;
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}
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cp->cn_dev = NULL;
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cp->cn_pri = CN_INTERNAL;
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}
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static void
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ofw_cons_init(struct consdev *cp)
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{
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cp->cn_dev = makedev(CDEV_MAJOR, 0);
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cp->cn_tp = ofw_tp;
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}
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static int
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ofw_cons_getc(dev_t dev)
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{
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unsigned char ch;
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int l;
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ch = '\0';
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while ((l = OF_read(stdin, &ch, 1)) != 1) {
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if (l != -2 && l != 0) {
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return (-1);
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}
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}
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return (ch);
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}
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static int
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ofw_cons_checkc(dev_t dev)
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{
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unsigned char ch;
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if (OF_read(stdin, &ch, 1) > 0) {
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return (ch);
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}
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return (-1);
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}
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static void
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ofw_cons_putc(dev_t dev, int c)
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{
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char cbuf;
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if (c == '\n') {
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cbuf = '\r';
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OF_write(stdout, &cbuf, 1);
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}
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cbuf = c;
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OF_write(stdout, &cbuf, 1);
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}
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