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-rw-r--r--sys/dev/ofw/ofw_console.c325
1 files changed, 325 insertions, 0 deletions
diff --git a/sys/dev/ofw/ofw_console.c b/sys/dev/ofw/ofw_console.c
new file mode 100644
index 0000000..aebc109
--- /dev/null
+++ b/sys/dev/ofw/ofw_console.c
@@ -0,0 +1,325 @@
+/*
+ * Copyright (C) 2001 Benno Rice.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef lint
+static const char rcsid[] =
+ "$FreeBSD$";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/types.h>
+#include <sys/conf.h>
+#include <sys/cons.h>
+#include <sys/consio.h>
+#include <sys/tty.h>
+
+#include <dev/ofw/openfirm.h>
+
+#define OFW_POLL_HZ 4
+
+static d_open_t ofw_dev_open;
+static d_close_t ofw_dev_close;
+static d_ioctl_t ofw_dev_ioctl;
+
+#define CDEV_MAJOR 97
+
+static struct cdevsw ofw_cdevsw = {
+ /* open */ ofw_dev_open,
+ /* close */ ofw_dev_close,
+ /* read */ ttyread,
+ /* write */ ttywrite,
+ /* ioctl */ ofw_dev_ioctl,
+ /* poll */ ttypoll,
+ /* mmap */ nommap,
+ /* strategy */ nostrategy,
+ /* name */ "ofw",
+ /* major */ CDEV_MAJOR,
+ /* dump */ nodump,
+ /* psize */ nopsize,
+ /* flags */ 0,
+};
+
+static struct tty *ofw_tp = NULL;
+static int polltime;
+static struct callout_handle ofw_timeouthandle
+ = CALLOUT_HANDLE_INITIALIZER(&ofw_timeouthandle);
+
+static void ofw_tty_start(struct tty *);
+static int ofw_tty_param(struct tty *, struct termios *);
+static void ofw_tty_stop(struct tty *, int);
+static void ofw_timeout(void *);
+
+static cn_probe_t ofw_cons_probe;
+static cn_init_t ofw_cons_init;
+static cn_getc_t ofw_cons_getc;
+static cn_checkc_t ofw_cons_checkc;
+static cn_putc_t ofw_cons_putc;
+
+CONS_DRIVER(ofw, ofw_cons_probe, ofw_cons_init, NULL, ofw_cons_getc,
+ ofw_cons_checkc, ofw_cons_putc, NULL);
+
+static void
+cn_drvinit(void *unused)
+{
+ phandle_t options;
+ char output[32];
+
+ if (ofw_consdev.cn_dev != NULL) {
+ if ((options = OF_finddevice("/options")) == -1 ||
+ OF_getprop(options, "output-device", output,
+ sizeof(output)) == -1)
+ return;
+ make_dev(&ofw_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "ofwcons");
+ make_dev_alias(ofw_consdev.cn_dev, "%s", output);
+ }
+}
+
+SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE + CDEV_MAJOR, cn_drvinit, NULL)
+
+static int stdin;
+static int stdout;
+
+static int
+ofw_dev_open(dev_t dev, int flag, int mode, struct thread *td)
+{
+ struct tty *tp;
+ int unit;
+ int error, setuptimeout;
+
+ error = 0;
+ setuptimeout = 0;
+ unit = minor(dev);
+
+ tp = ofw_tp = dev->si_tty = ttymalloc(ofw_tp);
+
+ tp->t_oproc = ofw_tty_start;
+ tp->t_param = ofw_tty_param;
+ tp->t_stop = ofw_tty_stop;
+ tp->t_dev = dev;
+
+ if ((tp->t_state & TS_ISOPEN) == 0) {
+ tp->t_state |= TS_CARR_ON;
+ ttychars(tp);
+ tp->t_iflag = TTYDEF_IFLAG;
+ tp->t_oflag = TTYDEF_OFLAG;
+ tp->t_cflag = TTYDEF_CFLAG|CLOCAL;
+ tp->t_lflag = TTYDEF_LFLAG;
+ tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
+ ttsetwater(tp);
+
+ setuptimeout = 1;
+ } else if ((tp->t_state & TS_XCLUDE) && suser(td)) {
+ return (EBUSY);
+ }
+
+ error = (*linesw[tp->t_line].l_open)(dev, tp);
+
+ if (error == 0 && setuptimeout) {
+ polltime = hz / OFW_POLL_HZ;
+ if (polltime < 1) {
+ polltime = 1;
+ }
+
+ ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
+ }
+
+ return (error);
+}
+
+static int
+ofw_dev_close(dev_t dev, int flag, int mode, struct thread *td)
+{
+ int unit;
+ struct tty *tp;
+
+ unit = minor(dev);
+ tp = ofw_tp;
+
+ if (unit != 0) {
+ return (ENXIO);
+ }
+
+ (*linesw[tp->t_line].l_close)(tp, flag);
+ ttyclose(tp);
+
+ return (0);
+}
+
+static int
+ofw_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
+{
+ int unit;
+ struct tty *tp;
+ int error;
+
+ unit = minor(dev);
+ tp = ofw_tp;
+
+ if (unit != 0) {
+ return (ENXIO);
+ }
+
+ error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td);
+ if (error != ENOIOCTL) {
+ return (error);
+ }
+
+ error = ttioctl(tp, cmd, data, flag);
+ if (error != ENOIOCTL) {
+ return (error);
+ }
+
+ return (ENOTTY);
+}
+
+static int
+ofw_tty_param(struct tty *tp, struct termios *t)
+{
+
+ return (0);
+}
+
+static void
+ofw_tty_start(struct tty *tp)
+{
+
+ if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
+ ttwwakeup(tp);
+ return;
+ }
+
+ tp->t_state |= TS_BUSY;
+ while (tp->t_outq.c_cc != 0) {
+ ofw_cons_putc(tp->t_dev, getc(&tp->t_outq));
+ }
+ tp->t_state &= ~TS_BUSY;
+
+ ttwwakeup(tp);
+}
+
+static void
+ofw_tty_stop(struct tty *tp, int flag)
+{
+
+ if (tp->t_state & TS_BUSY) {
+ if ((tp->t_state & TS_TTSTOP) == 0) {
+ tp->t_state |= TS_FLUSH;
+ }
+ }
+}
+
+static void
+ofw_timeout(void *v)
+{
+ struct tty *tp;
+ int c;
+
+ tp = (struct tty *)v;
+
+ while ((c = ofw_cons_checkc(tp->t_dev)) != -1) {
+ if (tp->t_state & TS_ISOPEN) {
+ (*linesw[tp->t_line].l_rint)(c, tp);
+ }
+ }
+
+ ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
+}
+
+static void
+ofw_cons_probe(struct consdev *cp)
+{
+ int chosen;
+
+ if ((chosen = OF_finddevice("/chosen")) == -1) {
+ cp->cn_pri = CN_DEAD;
+ return;
+ }
+
+ if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) {
+ cp->cn_pri = CN_DEAD;
+ return;
+ }
+
+ if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) {
+ cp->cn_pri = CN_DEAD;
+ return;
+ }
+
+ cp->cn_dev = NULL;
+ cp->cn_pri = CN_INTERNAL;
+}
+
+static void
+ofw_cons_init(struct consdev *cp)
+{
+
+ cp->cn_dev = makedev(CDEV_MAJOR, 0);
+ cp->cn_tp = ofw_tp;
+}
+
+static int
+ofw_cons_getc(dev_t dev)
+{
+ unsigned char ch;
+ int l;
+
+ ch = '\0';
+
+ while ((l = OF_read(stdin, &ch, 1)) != 1) {
+ if (l != -2 && l != 0) {
+ return (-1);
+ }
+ }
+
+ return (ch);
+}
+
+static int
+ofw_cons_checkc(dev_t dev)
+{
+ unsigned char ch;
+
+ if (OF_read(stdin, &ch, 1) > 0) {
+ return (ch);
+ }
+
+ return (-1);
+}
+
+static void
+ofw_cons_putc(dev_t dev, int c)
+{
+ char cbuf;
+
+ if (c == '\n') {
+ cbuf = '\r';
+ OF_write(stdout, &cbuf, 1);
+ }
+
+ cbuf = c;
+ OF_write(stdout, &cbuf, 1);
+}
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