612 lines
14 KiB
C
612 lines
14 KiB
C
/* $NetBSD: siotty.c,v 1.23 2008/06/13 09:58:06 cegger Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Tohru Nishimura.
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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 THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: siotty.c,v 1.23 2008/06/13 09:58:06 cegger Exp $");
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#include "opt_ddb.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <sys/ioctl.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/tty.h>
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#include <sys/uio.h>
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#include <sys/callout.h>
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#include <sys/fcntl.h>
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#include <dev/cons.h>
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#include <sys/kauth.h>
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#include <machine/cpu.h>
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#include <luna68k/dev/sioreg.h>
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#include <luna68k/dev/siovar.h>
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#define TIOCM_BREAK 01000 /* non standard use */
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static const u_int8_t ch0_regs[6] = {
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WR0_RSTINT, /* reset E/S interrupt */
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WR1_RXALLS | WR1_TXENBL, /* Rx per char, Tx */
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0, /* */
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WR3_RX8BIT | WR3_RXENBL, /* Rx */
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WR4_BAUD96 | WR4_STOP1, /* Tx/Rx */
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WR5_TX8BIT | WR5_TXENBL | WR5_DTR | WR5_RTS, /* Tx */
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};
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static const struct speedtab siospeedtab[] = {
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{ 2400, WR4_BAUD24, },
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{ 4800, WR4_BAUD48, },
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{ 9600, WR4_BAUD96, },
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{ -1, 0, },
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};
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struct siotty_softc {
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struct device sc_dev;
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struct tty *sc_tty;
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struct sioreg *sc_ctl;
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u_int sc_flags;
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u_int8_t sc_wr[6];
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};
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#include "siotty.h"
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static void siostart __P((struct tty *));
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static int sioparam __P((struct tty *, struct termios *));
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static void siottyintr __P((int));
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static int siomctl __P((struct siotty_softc *, int, int));
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static int siotty_match __P((struct device *, struct cfdata *, void *));
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static void siotty_attach __P((struct device *, struct device *, void *));
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CFATTACH_DECL(siotty, sizeof(struct siotty_softc),
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siotty_match, siotty_attach, NULL, NULL);
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extern struct cfdriver siotty_cd;
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dev_type_open(sioopen);
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dev_type_close(sioclose);
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dev_type_read(sioread);
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dev_type_write(siowrite);
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dev_type_ioctl(sioioctl);
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dev_type_stop(siostop);
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dev_type_tty(siotty);
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dev_type_poll(siopoll);
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const struct cdevsw siotty_cdevsw = {
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sioopen, sioclose, sioread, siowrite, sioioctl,
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siostop, siotty, siopoll, nommap, ttykqfilter, D_TTY
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};
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static int
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siotty_match(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct sio_attach_args *args = aux;
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if (args->channel != 0) /* XXX allow tty on Ch.B XXX */
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return 0;
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return 1;
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}
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static void
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siotty_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 sio_softc *scp = (void *)parent;
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struct siotty_softc *sc = (void *)self;
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struct sio_attach_args *args = aux;
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sc->sc_ctl = (struct sioreg *)scp->scp_ctl + args->channel;
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bcopy(ch0_regs, sc->sc_wr, sizeof(ch0_regs));
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scp->scp_intr[args->channel] = siottyintr;
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if (args->hwflags == 1) {
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printf(" (console)");
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sc->sc_flags = TIOCFLAG_SOFTCAR;
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}
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else {
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setsioreg(sc->sc_ctl, WR0, WR0_CHANRST);
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setsioreg(sc->sc_ctl, WR2A, WR2_VEC86 | WR2_INTR_1);
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setsioreg(sc->sc_ctl, WR2B, 0);
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setsioreg(sc->sc_ctl, WR0, sc->sc_wr[WR0]);
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setsioreg(sc->sc_ctl, WR4, sc->sc_wr[WR4]);
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setsioreg(sc->sc_ctl, WR3, sc->sc_wr[WR3]);
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setsioreg(sc->sc_ctl, WR5, sc->sc_wr[WR5]);
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setsioreg(sc->sc_ctl, WR0, sc->sc_wr[WR0]);
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}
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setsioreg(sc->sc_ctl, WR1, sc->sc_wr[WR1]); /* now interrupt driven */
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printf("\n");
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}
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/*-------------------- low level routine --------------------*/
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static void
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siottyintr(int chan)
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{
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struct siotty_softc *sc;
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struct sioreg *sio;
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struct tty *tp;
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unsigned int code;
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int rr;
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sc = device_lookup_private(&siotty_cd, chan);
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if (sc == NULL)
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return;
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tp = sc->sc_tty;
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sio = sc->sc_ctl;
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rr = getsiocsr(sio);
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if (rr & RR_RXRDY) {
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do {
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code = sio->sio_data;
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if (rr & (RR_FRAMING | RR_OVERRUN | RR_PARITY)) {
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sio->sio_cmd = WR0_ERRRST;
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if (sio->sio_stat & RR_FRAMING)
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code |= TTY_FE;
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else if (sio->sio_stat & RR_PARITY)
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code |= TTY_PE;
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}
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if (tp == NULL || (tp->t_state & TS_ISOPEN) == 0)
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continue;
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#if 0 && defined(DDB) /* ?!?! fails to resume ?!?! */
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if ((rr & RR_BREAK) && tp->t_dev == cn_tab->cn_dev) {
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cpu_Debugger();
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return;
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}
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#endif
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(*tp->t_linesw->l_rint)(code, tp);
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} while ((rr = getsiocsr(sio)) & RR_RXRDY);
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}
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if (rr & RR_TXRDY) {
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sio->sio_cmd = WR0_RSTPEND;
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if (tp != NULL) {
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tp->t_state &= ~(TS_BUSY|TS_FLUSH);
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(*tp->t_linesw->l_start)(tp);
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}
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}
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}
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static void
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siostart(struct tty *tp)
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{
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struct siotty_softc *sc = device_lookup_private(&siotty_cd,minor(tp->t_dev));
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int s, c;
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s = spltty();
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if (tp->t_state & (TS_BUSY|TS_TIMEOUT|TS_TTSTOP))
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goto out;
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if (!ttypull(tp))
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goto out;
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tp->t_state |= TS_BUSY;
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while (getsiocsr(sc->sc_ctl) & RR_TXRDY) {
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if ((c = getc(&tp->t_outq)) == -1)
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break;
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sc->sc_ctl->sio_data = c;
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}
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out:
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splx(s);
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}
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void
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siostop(tp, flag)
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struct tty *tp;
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int flag;
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{
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int s;
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s = spltty();
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if (TS_BUSY == (tp->t_state & (TS_BUSY|TS_TTSTOP))) {
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/*
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* Device is transmitting; must stop it.
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*/
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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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static int
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sioparam(struct tty *tp, struct termios *t)
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{
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struct siotty_softc *sc = device_lookup_private(&siotty_cd,minor(tp->t_dev));
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int wr4, s;
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if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
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return EINVAL;
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wr4 = ttspeedtab(t->c_ospeed, siospeedtab);
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if (wr4 < 0)
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return EINVAL;
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if (sc->sc_flags & TIOCFLAG_SOFTCAR) {
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t->c_cflag |= CLOCAL;
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t->c_cflag &= ~HUPCL;
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}
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if (sc->sc_flags & TIOCFLAG_CLOCAL)
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t->c_cflag |= CLOCAL;
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/*
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* If there were no changes, don't do anything. This avoids dropping
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* input and improves performance when all we did was frob things like
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* VMIN and VTIME.
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*/
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if (tp->t_ospeed == t->c_ospeed && tp->t_cflag == t->c_cflag)
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return 0;
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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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sc->sc_wr[WR3] &= 0x3f;
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sc->sc_wr[WR5] &= 0x9f;
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switch (tp->t_cflag & CSIZE) {
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case CS7:
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sc->sc_wr[WR3] |= WR3_RX7BIT; sc->sc_wr[WR5] |= WR5_TX7BIT;
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break;
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case CS8:
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sc->sc_wr[WR3] |= WR3_RX8BIT; sc->sc_wr[WR5] |= WR5_TX8BIT;
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break;
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}
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if (tp->t_cflag & PARENB) {
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wr4 |= WR4_PARENAB;
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if ((tp->t_cflag & PARODD) == 0)
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wr4 |= WR4_EPARITY;
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}
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wr4 |= (tp->t_cflag & CSTOPB) ? WR4_STOP2 : WR4_STOP1;
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sc->sc_wr[WR4] = wr4;
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s = spltty();
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setsioreg(sc->sc_ctl, WR4, sc->sc_wr[WR4]);
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setsioreg(sc->sc_ctl, WR3, sc->sc_wr[WR3]);
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setsioreg(sc->sc_ctl, WR5, sc->sc_wr[WR5]);
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splx(s);
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return 0;
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}
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static int
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siomctl(sc, control, op)
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struct siotty_softc *sc;
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int control, op;
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{
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int val, s, wr5, rr;
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val = 0;
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if (control & TIOCM_BREAK)
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val |= WR5_BREAK;
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if (control & TIOCM_DTR)
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val |= WR5_DTR;
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if (control & TIOCM_RTS)
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val |= WR5_RTS;
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s = spltty();
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wr5 = sc->sc_wr[WR5];
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switch (op) {
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case DMSET:
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wr5 &= ~(WR5_BREAK|WR5_DTR|WR5_RTS);
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/* FALLTHRU */
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case DMBIS:
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wr5 |= val;
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break;
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case DMBIC:
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wr5 &= ~val;
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break;
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case DMGET:
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val = 0;
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rr = getsiocsr(sc->sc_ctl);
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if (wr5 & WR5_DTR)
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val |= TIOCM_DTR;
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if (wr5 & WR5_RTS)
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val |= TIOCM_RTS;
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if (rr & RR_CTS)
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val |= TIOCM_CTS;
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if (rr & RR_DCD)
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val |= TIOCM_CD;
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goto done;
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}
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sc->sc_wr[WR5] = wr5;
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setsioreg(sc->sc_ctl, WR5, wr5);
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val = 0;
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done:
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splx(s);
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return val;
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}
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/*-------------------- cdevsw[] interface --------------------*/
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int
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sioopen(dev_t dev, int flag, int mode, struct lwp *l)
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{
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struct siotty_softc *sc;
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struct tty *tp;
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int error;
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sc = device_lookup_private(&siotty_cd, minor(dev));
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if (sc == NULL)
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return ENXIO;
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if ((tp = sc->sc_tty) == NULL) {
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tp = sc->sc_tty = ttymalloc();
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tty_attach(tp);
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}
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tp->t_oproc = siostart;
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tp->t_param = sioparam;
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tp->t_hwiflow = NULL /* XXX siohwiflow XXX */;
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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) == 0 && tp->t_wopen == 0) {
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struct termios t;
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t.c_ispeed = t.c_ospeed = TTYDEF_SPEED;
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t.c_cflag = TTYDEF_CFLAG;
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tp->t_ospeed = 0; /* force register update */
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(void)sioparam(tp, &t);
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_lflag = TTYDEF_LFLAG;
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ttychars(tp);
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ttsetwater(tp);
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/* raise RTS and DTR here; but, DTR lead is not wired */
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/* then check DCD condition; but, DCD lead is not wired */
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tp->t_state |= TS_CARR_ON; /* assume detected all the time */
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#if 0
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if ((sc->sc_flags & TIOCFLAG_SOFTCAR)
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|| (tp->t_cflag & MDMBUF)
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|| (getsiocsr(sc->sc_ctl) & RR_DCD))
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tp->t_state |= TS_CARR_ON;
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else
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tp->t_state &= ~TS_CARR_ON;
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#endif
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}
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error = ttyopen(tp, 0, (flag & O_NONBLOCK));
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if (error > 0)
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return error;
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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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sioclose(dev_t dev, int flag, int mode, struct lwp *l)
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{
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struct siotty_softc *sc = device_lookup_private(&siotty_cd,minor(dev));
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struct tty *tp = sc->sc_tty;
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int s;
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(*tp->t_linesw->l_close)(tp, flag);
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s = spltty();
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siomctl(sc, TIOCM_BREAK, DMBIC);
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#if 0 /* because unable to feed DTR signal */
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if ((tp->t_cflag & HUPCL)
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|| tp->t_wopen || (tp->t_state & TS_ISOPEN) == 0) {
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siomctl(sc, TIOCM_DTR, DMBIC);
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/* Yield CPU time to others for 1 second, then ... */
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siomctl(sc, TIOCM_DTR, DMBIS);
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}
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#endif
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splx(s);
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return ttyclose(tp);
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}
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int
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sioread(dev_t dev, struct uio *uio, int flag)
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{
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struct siotty_softc *sc = device_lookup_private(&siotty_cd,minor(dev));
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struct tty *tp = sc->sc_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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siowrite(dev_t dev, struct uio *uio, int flag)
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{
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struct siotty_softc *sc = device_lookup_private(&siotty_cd,minor(dev));
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struct tty *tp = sc->sc_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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siopoll(dev_t dev, int events, struct lwp *l)
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{
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struct siotty_softc *sc = device_lookup_private(&siotty_cd,minor(dev));
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struct tty *tp = sc->sc_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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sioioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
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{
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struct siotty_softc *sc = device_lookup_private(&siotty_cd,minor(dev));
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struct tty *tp = sc->sc_tty;
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int error;
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error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l);
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if (error != EPASSTHROUGH)
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return error;
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error = ttioctl(tp, cmd, data, flag, l);
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if (error != EPASSTHROUGH)
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return error;
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/* the last resort for TIOC ioctl tranversing */
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switch (cmd) {
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case TIOCSBRK: /* Set the hardware into BREAK condition */
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siomctl(sc, TIOCM_BREAK, DMBIS);
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break;
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case TIOCCBRK: /* Clear the hardware BREAK condition */
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siomctl(sc, TIOCM_BREAK, DMBIC);
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break;
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case TIOCSDTR: /* Assert DTR signal */
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siomctl(sc, TIOCM_DTR|TIOCM_RTS, DMBIS);
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break;
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case TIOCCDTR: /* Clear DTR signal */
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siomctl(sc, TIOCM_DTR|TIOCM_RTS, DMBIC);
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break;
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case TIOCMSET: /* Set modem state replacing current one */
|
|
siomctl(sc, *(int *)data, DMSET);
|
|
break;
|
|
case TIOCMGET: /* Return current modem state */
|
|
*(int *)data = siomctl(sc, 0, DMGET);
|
|
break;
|
|
case TIOCMBIS: /* Set individual bits of modem state */
|
|
siomctl(sc, *(int *)data, DMBIS);
|
|
break;
|
|
case TIOCMBIC: /* Clear individual bits of modem state */
|
|
siomctl(sc, *(int *)data, DMBIC);
|
|
break;
|
|
case TIOCSFLAGS: /* Instruct how serial port behaves */
|
|
sc->sc_flags = *(int *)data;
|
|
break;
|
|
case TIOCGFLAGS: /* Return current serial port state */
|
|
*(int *)data = sc->sc_flags;
|
|
break;
|
|
default:
|
|
return EPASSTHROUGH;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* ARSGUSED */
|
|
struct tty *
|
|
siotty(dev_t dev)
|
|
{
|
|
struct siotty_softc *sc = device_lookup_private(&siotty_cd,minor(dev));
|
|
|
|
return sc->sc_tty;
|
|
}
|
|
|
|
/*-------------------- miscelleneous routine --------------------*/
|
|
|
|
/* EXPORT */ void
|
|
setsioreg(struct sioreg *sio, int regno, int val)
|
|
{
|
|
if (regno != 0)
|
|
sio->sio_cmd = regno; /* DELAY(); */
|
|
sio->sio_cmd = val; /* DELAY(); */
|
|
}
|
|
|
|
/* EXPORT */ int
|
|
getsiocsr(struct sioreg *sio)
|
|
{
|
|
int val;
|
|
|
|
val = sio->sio_stat << 8; /* DELAY(); */
|
|
sio->sio_cmd = 1; /* DELAY(); */
|
|
val |= sio->sio_stat; /* DELAY(); */
|
|
return val;
|
|
}
|
|
|
|
/*--------------------- console interface ----------------------*/
|
|
|
|
void syscnattach __P((int));
|
|
int syscngetc __P((dev_t));
|
|
void syscnputc __P((dev_t, int));
|
|
|
|
struct consdev syscons = {
|
|
NULL,
|
|
NULL,
|
|
syscngetc,
|
|
syscnputc,
|
|
nullcnpollc,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NODEV,
|
|
CN_REMOTE,
|
|
};
|
|
|
|
/* EXPORT */ void
|
|
syscnattach(channel)
|
|
int channel;
|
|
{
|
|
/*
|
|
* Channel A is immediately initialized with 9600N1 right after cold
|
|
* boot/reset/poweron. ROM monitor emits one line message on CH.A.
|
|
*/
|
|
struct sioreg *sio;
|
|
sio = (struct sioreg *)0x51000000 + channel;
|
|
|
|
syscons.cn_dev = makedev(cdevsw_lookup_major(&siotty_cdevsw),
|
|
channel);
|
|
cn_tab = &syscons;
|
|
|
|
setsioreg(sio, WR0, WR0_CHANRST);
|
|
setsioreg(sio, WR2A, WR2_VEC86 | WR2_INTR_1);
|
|
setsioreg(sio, WR2B, 0);
|
|
setsioreg(sio, WR0, ch0_regs[WR0]);
|
|
setsioreg(sio, WR4, ch0_regs[WR4]);
|
|
setsioreg(sio, WR3, ch0_regs[WR3]);
|
|
setsioreg(sio, WR5, ch0_regs[WR5]);
|
|
setsioreg(sio, WR0, ch0_regs[WR0]);
|
|
}
|
|
|
|
/* EXPORT */ int
|
|
syscngetc(dev)
|
|
dev_t dev;
|
|
{
|
|
struct sioreg *sio;
|
|
int s, c;
|
|
|
|
sio = (struct sioreg *)0x51000000 + ((int)dev & 0x1);
|
|
s = splhigh();
|
|
while ((getsiocsr(sio) & RR_RXRDY) == 0)
|
|
;
|
|
c = sio->sio_data;
|
|
splx(s);
|
|
|
|
return c;
|
|
}
|
|
|
|
/* EXPORT */ void
|
|
syscnputc(dev, c)
|
|
dev_t dev;
|
|
int c;
|
|
{
|
|
struct sioreg *sio;
|
|
int s;
|
|
|
|
sio = (struct sioreg *)0x51000000 + ((int)dev & 0x1);
|
|
s = splhigh();
|
|
while ((getsiocsr(sio) & RR_TXRDY) == 0)
|
|
;
|
|
sio->sio_cmd = WR0_RSTPEND;
|
|
sio->sio_data = c;
|
|
splx(s);
|
|
}
|