385 lines
8.3 KiB
C
385 lines
8.3 KiB
C
/* $NetBSD: ofcons.c,v 1.29 2006/10/01 19:28:44 elad Exp $ */
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/*
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ofcons.c,v 1.29 2006/10/01 19:28:44 elad Exp $");
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/tty.h>
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#include <sys/kauth.h>
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#include <dev/cons.h>
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#include <dev/ofw/openfirm.h>
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struct ofcons_softc {
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struct device of_dev;
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struct tty *of_tty;
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struct callout sc_poll_ch;
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int of_flags;
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};
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/* flags: */
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#define OFPOLL 1
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#define OFBURSTLEN 128 /* max number of bytes to write in one chunk */
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cons_decl(ofcons_);
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static int stdin, stdout;
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static int ofcons_match(struct device *, struct cfdata *, void *);
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static void ofcons_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(ofcons, sizeof(struct ofcons_softc),
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ofcons_match, ofcons_attach, NULL, NULL);
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extern struct cfdriver ofcons_cd;
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dev_type_open(ofcons_open);
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dev_type_close(ofcons_close);
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dev_type_read(ofcons_read);
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dev_type_write(ofcons_write);
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dev_type_ioctl(ofcons_ioctl);
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dev_type_tty(ofcons_tty);
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dev_type_poll(ofcons_poll);
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const struct cdevsw ofcons_cdevsw = {
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ofcons_open, ofcons_close, ofcons_read, ofcons_write, ofcons_ioctl,
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nostop, ofcons_tty, ofcons_poll, nommap, ttykqfilter, D_TTY
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};
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static int ofcons_probe(void);
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static int
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ofcons_match(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct ofbus_attach_args *oba = aux;
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if (strcmp(oba->oba_busname, "ofw"))
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return (0);
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if (!ofcons_probe())
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return 0;
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return OF_instance_to_package(stdin) == oba->oba_phandle
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|| OF_instance_to_package(stdout) == oba->oba_phandle;
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}
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static void
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ofcons_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct ofcons_softc *sc = device_private(self);
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printf("\n");
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callout_init(&sc->sc_poll_ch);
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}
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static void ofcons_start(struct tty *);
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static int ofcons_param(struct tty *, struct termios *);
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static void ofcons_pollin(void *);
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int
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ofcons_open(dev, flag, mode, l)
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dev_t dev;
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int flag, mode;
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struct lwp *l;
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{
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struct ofcons_softc *sc;
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int unit = minor(dev);
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struct tty *tp;
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if (unit >= ofcons_cd.cd_ndevs)
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return ENXIO;
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sc = ofcons_cd.cd_devs[unit];
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if (!sc)
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return ENXIO;
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if (!(tp = sc->of_tty))
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sc->of_tty = tp = ttymalloc();
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tp->t_oproc = ofcons_start;
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tp->t_param = ofcons_param;
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tp->t_dev = dev;
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if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
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return (EBUSY);
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if (!(tp->t_state & TS_ISOPEN)) {
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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;
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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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ofcons_param(tp, &tp->t_termios);
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ttsetwater(tp);
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}
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tp->t_state |= TS_CARR_ON;
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if (!(sc->of_flags & OFPOLL)) {
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sc->of_flags |= OFPOLL;
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callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc);
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}
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return (*tp->t_linesw->l_open)(dev, tp);
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}
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int
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ofcons_close(dev, flag, mode, l)
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dev_t dev;
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int flag, mode;
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struct lwp *l;
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{
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struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->of_tty;
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callout_stop(&sc->sc_poll_ch);
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sc->of_flags &= ~OFPOLL;
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(*tp->t_linesw->l_close)(tp, flag);
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ttyclose(tp);
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return 0;
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}
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int
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ofcons_read(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->of_tty;
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return (*tp->t_linesw->l_read)(tp, uio, flag);
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}
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int
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ofcons_write(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->of_tty;
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return (*tp->t_linesw->l_write)(tp, uio, flag);
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}
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int
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ofcons_poll(dev, events, l)
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dev_t dev;
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int events;
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struct lwp *l;
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{
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struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->of_tty;
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return ((*tp->t_linesw->l_poll)(tp, events, l));
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}
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int
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ofcons_ioctl(dev, cmd, data, flag, l)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct lwp *l;
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{
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struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->of_tty;
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int error;
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if ((error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l)) != EPASSTHROUGH)
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return error;
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return ttioctl(tp, cmd, data, flag, l);
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}
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struct tty *
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ofcons_tty(dev)
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dev_t dev;
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{
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struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)];
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return sc->of_tty;
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}
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static void
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ofcons_start(tp)
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struct tty *tp;
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{
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struct clist *cl;
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int s, len;
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u_char buf[OFBURSTLEN];
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s = spltty();
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if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
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splx(s);
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return;
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}
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tp->t_state |= TS_BUSY;
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splx(s);
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cl = &tp->t_outq;
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len = q_to_b(cl, buf, OFBURSTLEN);
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OF_write(stdout, buf, len);
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s = spltty();
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tp->t_state &= ~TS_BUSY;
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if (cl->c_cc) {
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tp->t_state |= TS_TIMEOUT;
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callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, (void *)tp);
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}
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if (cl->c_cc <= 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(cl);
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}
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selwakeup(&tp->t_wsel);
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}
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splx(s);
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}
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static int
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ofcons_param(tp, t)
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struct tty *tp;
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struct termios *t;
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{
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tp->t_ispeed = t->c_ispeed;
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tp->t_ospeed = t->c_ospeed;
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tp->t_cflag = t->c_cflag;
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return 0;
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}
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static void
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ofcons_pollin(aux)
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void *aux;
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{
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struct ofcons_softc *sc = aux;
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struct tty *tp = sc->of_tty;
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char ch;
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while (OF_read(stdin, &ch, 1) > 0) {
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if (tp && (tp->t_state & TS_ISOPEN))
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(*tp->t_linesw->l_rint)(ch, tp);
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}
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callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc);
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}
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static int
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ofcons_probe()
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{
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int chosen;
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char stdinbuf[4], stdoutbuf[4];
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if (stdin)
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return 1;
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if ((chosen = OF_finddevice("/chosen")) == -1)
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return 0;
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if (OF_getprop(chosen, "stdin", stdinbuf, sizeof stdinbuf) !=
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sizeof stdinbuf ||
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OF_getprop(chosen, "stdout", stdoutbuf, sizeof stdoutbuf) !=
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sizeof stdoutbuf)
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return 0;
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/* Decode properties. */
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stdin = of_decode_int(stdinbuf);
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stdout = of_decode_int(stdoutbuf);
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return 1;
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}
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void
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ofcons_cnprobe(cd)
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struct consdev *cd;
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{
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int maj;
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if (!ofcons_probe())
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return;
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maj = cdevsw_lookup_major(&ofcons_cdevsw);
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cd->cn_dev = makedev(maj, 0);
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cd->cn_pri = CN_INTERNAL;
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}
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void
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ofcons_cninit(cd)
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struct consdev *cd;
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{
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}
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int
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ofcons_cngetc(dev)
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dev_t dev;
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{
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unsigned char ch = '\0';
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int l;
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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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return ch;
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}
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void
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ofcons_cnputc(dev, c)
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dev_t dev;
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int c;
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{
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char ch = c;
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OF_write(stdout, &ch, 1);
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}
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void
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ofcons_cnpollc(dev, on)
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dev_t dev;
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int on;
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{
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struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)];
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if (!sc)
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return;
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if (on) {
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if (sc->of_flags & OFPOLL)
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callout_stop(&sc->sc_poll_ch);
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sc->of_flags &= ~OFPOLL;
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} else {
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if (!(sc->of_flags & OFPOLL)) {
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sc->of_flags |= OFPOLL;
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callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc);
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}
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}
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}
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