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NetBSD/sys/dev/dec/qbus/dl.c

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/* $NetBSD: dl.c,v 1.6 1999/01/19 21:04:48 ragge Exp $ */
/*-
* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 THE FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Copyright (c) 1997 Ben Harris. All rights reserved.
* Copyright (c) 1996 Ken C. Wellsch. All rights reserved.
* Copyright (c) 1982, 1986, 1990, 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell and Rick Macklem.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
*/
/*
* dl.c -- Device driver for the DL11 and DLV11 serial cards.
*
* OS-interface code derived from the dz and dca (hp300) drivers.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/map.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <machine/pte.h>
#include <machine/trap.h>
#include <machine/scb.h>
#include <vax/uba/ubareg.h>
#include <vax/uba/ubavar.h>
#include <vax/uba/dlreg.h>
#define DL_I2C(i) (i)
#define DL_C2I(c) (c)
struct dl_softc {
struct device sc_dev;
dlregs* sc_addr;
struct tty* sc_tty;
};
static int dl_match __P((struct device *, struct cfdata *, void *));
static void dl_attach __P((struct device *, struct device *, void *));
static void dlrint __P((int));
static void dlxint __P((int));
static void dlstart __P((struct tty *));
static int dlparam __P((struct tty *, struct termios *));
static void dlbrk __P((struct dl_softc *, int));
struct tty * dltty __P((dev_t));
int dlopen __P((dev_t, int, int, struct proc *));
int dlclose __P((dev_t, int, int, struct proc *));
int dlread __P((dev_t, struct uio *, int));
int dlwrite __P((dev_t, struct uio *, int));
int dlioctl __P((dev_t, int, caddr_t, int, struct proc *));
void dlstop __P((struct tty *, int));
struct cfattach dl_ca = {
sizeof(struct dl_softc), dl_match, dl_attach
};
extern struct cfdriver dl_cd;
/* Autoconfig handles: setup the controller to interrupt, */
/* then complete the housecleaning for full operation */
static int
dl_match (parent, cf, aux)
struct device * parent;
struct cfdata *cf;
void *aux;
{
struct uba_attach_args *ua = aux;
register dlregs *dladdr;
dladdr = (dlregs*) ua->ua_addr;
#ifdef DL_DEBUG
printf("Probing for dl at %lo ... ", (long)dladdr);
#endif
dladdr->dl_xcsr = DL_XCSR_TXIE;
if (dladdr->dl_xcsr != (DL_XCSR_TXIE | DL_XCSR_TX_READY)) {
#ifdef DL_DEBUG
printf("failed (step 1; XCSR = %.4b)\n", dladdr->dl_xcsr,
DL_XCSR_BITS);
#endif
return 0;
}
/*
* We have to force an interrupt so the uba driver can work
* out where we are. Unfortunately, the only way to make a
* DL11 interrupt is to get it to send or receive a
* character. We'll send a NUL and hope it doesn't hurt
* anything.
*/
dladdr->u_xbuf.bytes.byte_lo = '\0';
#if 0 /* This test seems to fail 2/3 of the time :-( */
if (dladdr->dl_xcsr != (DL_XCSR_TXIE)) {
#ifdef DL_DEBUG
printf("failed (step 2; XCSR = %.4b)\n", dladdr->dl_xcsr,
DL_XCSR_BITS);
#endif
return 0;
}
#endif
DELAY(100000); /* delay 1/10 s for character to transmit */
if (dladdr->dl_xcsr != (DL_XCSR_TXIE | DL_XCSR_TX_READY)) {
#ifdef DL_DEBUG
printf("failed (step 3; XCSR = %.4b)\n", dladdr->dl_xcsr,
DL_XCSR_BITS);
#endif
return 0;
}
/* Register the TX interrupt handler */
ua->ua_ivec = dlxint;
/* What else do I need to do? */
return 1;
}
static void
dl_attach (parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct dl_softc *sc = (void *)self;
register struct uba_attach_args *ua = aux;
register dlregs *dladdr;
dladdr = (dlregs *) ua->ua_addr;
sc->sc_addr = dladdr;
/* Tidy up the device */
dladdr->dl_rcsr = DL_RCSR_RXIE;
dladdr->dl_xcsr = DL_XCSR_TXIE;
/* Initialize our softc structure. Should be done in open? */
sc->sc_tty = ttymalloc();
tty_attach(sc->sc_tty);
/* Now register the RX interrupt handler */
scb_vecalloc(ua->ua_cvec - 4, dlrint, self->dv_unit, SCB_ISTACK);
printf("\n");
}
/* Receiver Interrupt Handler */
static void
dlrint(cntlr)
int cntlr;
{
struct dl_softc *sc = dl_cd.cd_devs[cntlr];
volatile dlregs *dladdr;
register struct tty *tp;
register int cc;
register unsigned c;
dladdr = sc->sc_addr;
if (dladdr->dl_rcsr & DL_RCSR_RX_DONE) {
c = dladdr->dl_rbuf;
cc = c & 0xFF;
tp = sc->sc_tty;
if (!(tp->t_state & TS_ISOPEN)) {
wakeup((caddr_t)&tp->t_rawq);
return;
}
if (c & DL_RBUF_OVERRUN_ERR)
/*
* XXX: This should really be logged somwhere
* else where we can afford the time.
*/
log(LOG_WARNING, "%s: rx overrun\n",
sc->sc_dev.dv_xname);
if (c & DL_RBUF_FRAMING_ERR)
cc |= TTY_FE;
if (c & DL_RBUF_PARITY_ERR)
cc |= TTY_PE;
(*linesw[tp->t_line].l_rint)(cc, tp);
} else
log(LOG_WARNING, "%s: stray rx interrupt\n",
sc->sc_dev.dv_xname);
return;
}
/* Transmitter Interrupt Handler */
static void
dlxint(cntlr)
int cntlr;
{
struct dl_softc *sc = dl_cd.cd_devs[cntlr];
volatile dlregs *dladdr;
register struct tty *tp;
dladdr = sc->sc_addr;
tp = sc->sc_tty;
tp->t_state &= ~(TS_BUSY | TS_FLUSH);
if (tp->t_line)
(*linesw[tp->t_line].l_start)(tp);
else
dlstart(tp);
return;
}
int
dlopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
register struct tty *tp;
register int unit;
struct dl_softc *sc;
unit = DL_I2C(minor(dev));
if (unit >= dl_cd.cd_ndevs || dl_cd.cd_devs[unit] == NULL)
return ENXIO;
sc = dl_cd.cd_devs[unit];
tp = sc->sc_tty;
if (tp == NULL)
return ENODEV;
tp->t_oproc = dlstart;
tp->t_param = dlparam;
tp->t_dev = dev;
if (!(tp->t_state & TS_ISOPEN)) {
ttychars(tp);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
/* No modem control, so set CLOCAL. */
tp->t_cflag = TTYDEF_CFLAG | CLOCAL;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
dlparam(tp, &tp->t_termios);
ttsetwater(tp);
} else if ((tp->t_state & TS_XCLUDE) && p->p_ucred->cr_uid != 0)
return EBUSY;
return ((*linesw[tp->t_line].l_open)(dev, tp));
}
/*ARGSUSED*/
int
dlclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct dl_softc *sc;
register struct tty *tp;
register int unit;
unit = DL_I2C(minor(dev));
sc = dl_cd.cd_devs[unit];
tp = sc->sc_tty;
(*linesw[tp->t_line].l_close)(tp, flag);
/* Make sure a BREAK state is not left enabled. */
dlbrk(sc, 0);
return (ttyclose(tp));
}
int
dlread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
register struct tty *tp;
struct dl_softc *sc;
register int unit;
unit = DL_I2C(minor(dev));
sc = dl_cd.cd_devs[unit];
tp = sc->sc_tty;
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
int
dlwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
register struct tty *tp;
struct dl_softc *sc;
register int unit;
unit = DL_I2C(minor(dev));
sc = dl_cd.cd_devs[unit];
tp = sc->sc_tty;
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}
int
dlioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct dl_softc *sc;
register struct tty *tp;
register int unit;
int error;
unit = DL_I2C(minor(dev));
sc = dl_cd.cd_devs[unit];
tp = sc->sc_tty;
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error >= 0)
return (error);
error = ttioctl(tp, cmd, data, flag, p);
if (error >= 0)
return (error);
switch (cmd) {
case TIOCSBRK:
dlbrk(sc, 1);
break;
case TIOCCBRK:
dlbrk(sc, 0);
break;
case TIOCMGET:
/* No modem control, assume they're all low. */
*(int *)data = 0;
break;
default:
return (ENOTTY);
}
return (0);
}
struct tty *
dltty(dev)
dev_t dev;
{
register struct dl_softc* sc;
sc = dl_cd.cd_devs[DL_I2C(minor(dev))];
return sc->sc_tty;
}
void
dlstop(tp, flag)
register struct tty *tp;
int flag;
{
register struct dl_softc *sc;
int unit, s;
unit = DL_I2C(minor(tp->t_dev));
sc = dl_cd.cd_devs[unit];
s = spltty();
if (tp->t_state & TS_BUSY)
if (!(tp->t_state & TS_TTSTOP))
tp->t_state |= TS_FLUSH;
splx(s);
}
static void
dlstart(tp)
register struct tty *tp;
{
register struct dl_softc *sc;
register dlregs *dladdr;
register int unit;
int s;
unit = DL_I2C(minor(tp->t_dev));
sc = dl_cd.cd_devs[unit];
s = spltty();
if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP))
goto out;
if (tp->t_outq.c_cc <= tp->t_lowat) {
if (tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup((caddr_t)&tp->t_outq);
}
selwakeup(&tp->t_wsel);
}
if (tp->t_outq.c_cc == 0)
goto out;
dladdr = sc->sc_addr;
if (dladdr->dl_xcsr & DL_XCSR_TX_READY) {
tp->t_state |= TS_BUSY;
dladdr->u_xbuf.bytes.byte_lo = getc(&tp->t_outq);
}
out:
splx(s);
return;
}
/*ARGSUSED*/
static int
dlparam(tp, t)
register struct tty *tp;
register struct termios *t;
{
/*
* All this kind of stuff (speed, character format, whatever)
* is set by jumpers on the card. Changing it is thus rather
* tricky for a mere device driver.
*/
return 0;
}
static void
dlbrk(sc, state)
register struct dl_softc *sc;
int state;
{
register dlregs *dladdr;
int s;
dladdr = sc->sc_addr;
s = spltty();
if (state)
dladdr->dl_xcsr |= DL_XCSR_TX_BREAK;
else
dladdr->dl_xcsr &= ~DL_XCSR_TX_BREAK;
splx(s);
}
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