474 lines
13 KiB
C
474 lines
13 KiB
C
/* $NetBSD: dl.c,v 1.19 2001/11/13 07:11:23 lukem Exp $ */
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/*-
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* Copyright (c) 1996, 1997 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 Jason R. Thorpe.
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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 the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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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/*
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* Copyright (c) 1997 Ben Harris. All rights reserved.
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* Copyright (c) 1996 Ken C. Wellsch. All rights reserved.
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* Copyright (c) 1982, 1986, 1990, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell and Rick Macklem.
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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 the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* dl.c -- Device driver for the DL11 and DLV11 serial cards.
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*
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* OS-interface code derived from the dz and dca (hp300) drivers.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: dl.c,v 1.19 2001/11/13 07:11:23 lukem Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/map.h>
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#include <sys/buf.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <sys/kernel.h>
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#include <sys/syslog.h>
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <dev/qbus/ubavar.h>
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#include <dev/qbus/dlreg.h>
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#include "ioconf.h"
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struct dl_softc {
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struct device sc_dev;
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struct evcnt sc_rintrcnt;
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struct evcnt sc_tintrcnt;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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struct tty *sc_tty;
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};
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static int dl_match (struct device *, struct cfdata *, void *);
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static void dl_attach (struct device *, struct device *, void *);
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static void dlrint (void *);
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static void dlxint (void *);
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static void dlstart (struct tty *);
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static int dlparam (struct tty *, struct termios *);
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static void dlbrk (struct dl_softc *, int);
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struct tty * dltty (dev_t);
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cdev_decl(dl);
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struct cfattach dl_ca = {
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sizeof(struct dl_softc), dl_match, dl_attach
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};
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#define DL_READ_WORD(reg) \
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bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg)
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#define DL_WRITE_WORD(reg, val) \
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bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val)
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#define DL_WRITE_BYTE(reg, val) \
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val)
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/* Autoconfig handles: setup the controller to interrupt, */
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/* then complete the housecleaning for full operation */
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static int
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dl_match (struct device *parent, struct cfdata *cf, void *aux)
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{
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struct uba_attach_args *ua = aux;
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#ifdef DL_DEBUG
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printf("Probing for dl at %lo ... ", (long)ua->ua_iaddr);
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#endif
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bus_space_write_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR, DL_XCSR_TXIE);
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if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) !=
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(DL_XCSR_TXIE | DL_XCSR_TX_READY)) {
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#ifdef DL_DEBUG
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printf("failed (step 1; XCSR = %.4b)\n",
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bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR),
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DL_XCSR_BITS);
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#endif
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return 0;
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}
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/*
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* We have to force an interrupt so the uba driver can work
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* out where we are. Unfortunately, the only way to make a
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* DL11 interrupt is to get it to send or receive a
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* character. We'll send a NUL and hope it doesn't hurt
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* anything.
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*/
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bus_space_write_1(ua->ua_iot, ua->ua_ioh, DL_UBA_XBUFL, '\0');
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#if 0 /* This test seems to fail 2/3 of the time :-( */
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if (dladdr->dl_xcsr != (DL_XCSR_TXIE)) {
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#ifdef DL_DEBUG
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printf("failed (step 2; XCSR = %.4b)\n", dladdr->dl_xcsr,
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DL_XCSR_BITS);
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#endif
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return 0;
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}
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#endif
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DELAY(100000); /* delay 1/10 s for character to transmit */
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if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) !=
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(DL_XCSR_TXIE | DL_XCSR_TX_READY)) {
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#ifdef DL_DEBUG
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printf("failed (step 3; XCSR = %.4b)\n",
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bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR),
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DL_XCSR_BITS);
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#endif
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return 0;
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}
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/* What else do I need to do? */
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return 1;
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}
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static void
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dl_attach (struct device *parent, struct device *self, void *aux)
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{
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struct dl_softc *sc = (void *)self;
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struct uba_attach_args *ua = aux;
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sc->sc_iot = ua->ua_iot;
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sc->sc_ioh = ua->ua_ioh;
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/* Tidy up the device */
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DL_WRITE_WORD(DL_UBA_RCSR, DL_RCSR_RXIE);
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DL_WRITE_WORD(DL_UBA_XCSR, DL_XCSR_TXIE);
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/* Initialize our softc structure. Should be done in open? */
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sc->sc_tty = ttymalloc();
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tty_attach(sc->sc_tty);
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/* Now register the TX & RX interrupt handlers */
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uba_intr_establish(ua->ua_icookie, ua->ua_cvec,
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dlxint, sc, &sc->sc_tintrcnt);
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uba_intr_establish(ua->ua_icookie, ua->ua_cvec - 4,
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dlrint, sc, &sc->sc_rintrcnt);
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evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt,
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sc->sc_dev.dv_xname, "rintr");
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evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt,
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sc->sc_dev.dv_xname, "tintr");
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printf("\n");
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}
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/* Receiver Interrupt Handler */
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static void
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dlrint(void *arg)
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{
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struct dl_softc *sc = arg;
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if (DL_READ_WORD(DL_UBA_RCSR) & DL_RCSR_RX_DONE) {
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struct tty *tp = sc->sc_tty;
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unsigned c;
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int cc;
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c = DL_READ_WORD(DL_UBA_RBUF);
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cc = c & 0xFF;
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if (!(tp->t_state & TS_ISOPEN)) {
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wakeup((caddr_t)&tp->t_rawq);
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return;
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}
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if (c & DL_RBUF_OVERRUN_ERR) {
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/*
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* XXX: This should really be logged somwhere
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* else where we can afford the time.
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*/
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log(LOG_WARNING, "%s: rx overrun\n",
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sc->sc_dev.dv_xname);
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}
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if (c & DL_RBUF_FRAMING_ERR)
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cc |= TTY_FE;
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if (c & DL_RBUF_PARITY_ERR)
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cc |= TTY_PE;
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(*tp->t_linesw->l_rint)(cc, tp);
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#if defined(DIAGNOSTIC)
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} else {
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log(LOG_WARNING, "%s: stray rx interrupt\n",
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sc->sc_dev.dv_xname);
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#endif
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}
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}
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/* Transmitter Interrupt Handler */
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static void
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dlxint(void *arg)
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{
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struct dl_softc *sc = arg;
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struct tty *tp = sc->sc_tty;
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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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return;
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}
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int
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dlopen(dev_t dev, int flag, int mode, struct proc *p)
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{
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struct tty *tp;
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struct dl_softc *sc;
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int unit;
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unit = minor(dev);
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if (unit >= dl_cd.cd_ndevs || dl_cd.cd_devs[unit] == NULL)
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return ENXIO;
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sc = dl_cd.cd_devs[unit];
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tp = sc->sc_tty;
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if (tp == NULL)
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return ENODEV;
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tp->t_oproc = dlstart;
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tp->t_param = dlparam;
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tp->t_dev = dev;
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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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/* No modem control, so set CLOCAL. */
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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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dlparam(tp, &tp->t_termios);
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ttsetwater(tp);
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} else if ((tp->t_state & TS_XCLUDE) && p->p_ucred->cr_uid != 0)
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return EBUSY;
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return ((*tp->t_linesw->l_open)(dev, tp));
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}
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/*ARGSUSED*/
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int
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dlclose(dev_t dev, int flag, int mode, struct proc *p)
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{
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struct dl_softc *sc = dl_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->sc_tty;
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(*tp->t_linesw->l_close)(tp, flag);
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/* Make sure a BREAK state is not left enabled. */
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dlbrk(sc, 0);
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return (ttyclose(tp));
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}
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int
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dlread(dev_t dev, struct uio *uio, int flag)
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{
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struct dl_softc *sc = dl_cd.cd_devs[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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dlwrite(dev_t dev, struct uio *uio, int flag)
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{
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struct dl_softc *sc = dl_cd.cd_devs[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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dlpoll(dev_t dev, int events, struct proc *p)
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{
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struct dl_softc *sc = dl_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->sc_tty;
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return ((*tp->t_linesw->l_poll)(tp, events, p));
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}
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int
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dlioctl(dev_t dev, unsigned long cmd, caddr_t data, int flag, struct proc *p)
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{
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struct dl_softc *sc = dl_cd.cd_devs[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, p);
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if (error >= 0)
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return (error);
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error = ttioctl(tp, cmd, data, flag, p);
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if (error >= 0)
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return (error);
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switch (cmd) {
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case TIOCSBRK:
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dlbrk(sc, 1);
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break;
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case TIOCCBRK:
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dlbrk(sc, 0);
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break;
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case TIOCMGET:
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/* No modem control, assume they're all low. */
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*(int *)data = 0;
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break;
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default:
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return (ENOTTY);
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}
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return (0);
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}
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struct tty *
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dltty(dev_t dev)
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{
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struct dl_softc *sc = dl_cd.cd_devs[minor(dev)];
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return sc->sc_tty;
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}
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void
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dlstop(struct tty *tp, int flag)
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{
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int s = spltty();
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if ((tp->t_state & (TS_BUSY|TS_TTSTOP)) == TS_BUSY)
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tp->t_state |= TS_FLUSH;
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splx(s);
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}
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static void
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dlstart(struct tty *tp)
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{
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struct dl_softc *sc = dl_cd.cd_devs[minor(tp->t_dev)];
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int s = spltty();
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if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP))
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goto out;
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if (tp->t_outq.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((caddr_t)&tp->t_outq);
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}
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selwakeup(&tp->t_wsel);
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}
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if (tp->t_outq.c_cc == 0)
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goto out;
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if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) {
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tp->t_state |= TS_BUSY;
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DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq));
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}
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out:
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splx(s);
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return;
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}
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/*ARGSUSED*/
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static int
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dlparam(struct tty *tp, struct termios *t)
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{
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/*
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* All this kind of stuff (speed, character format, whatever)
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* is set by jumpers on the card. Changing it is thus rather
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* tricky for a mere device driver.
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*/
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return 0;
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}
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static void
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dlbrk(struct dl_softc *sc, int state)
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{
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int s = spltty();
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if (state) {
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DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) |
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DL_XCSR_TX_BREAK);
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} else {
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DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) &
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~DL_XCSR_TX_BREAK);
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}
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splx(s);
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}
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