255 lines
6.1 KiB
C
255 lines
6.1 KiB
C
/* $NetBSD: lms.c,v 1.38 2000/01/08 02:57:25 takemura Exp $ */
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/*-
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* Copyright (c) 1993, 1994 Charles M. Hannum.
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* Copyright (c) 1992, 1993 Erik Forsberg.
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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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*
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* THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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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/device.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/isa/isavar.h>
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#include <dev/wscons/wsconsio.h>
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#include <dev/wscons/wsmousevar.h>
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#define LMS_DATA 0 /* offset for data port, read-only */
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#define LMS_SIGN 1 /* offset for signature port, read-write */
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#define LMS_INTR 2 /* offset for interrupt port, read-only */
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#define LMS_CNTRL 2 /* offset for control port, write-only */
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#define LMS_CONFIG 3 /* for configuration port, read-write */
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#define LMS_NPORTS 4
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struct lms_softc { /* driver status information */
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struct device sc_dev;
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void *sc_ih;
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bus_space_tag_t sc_iot; /* bus i/o space identifier */
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bus_space_handle_t sc_ioh; /* bus i/o handle */
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int sc_enabled; /* device is open */
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int oldbuttons; /* mouse button status */
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struct device *sc_wsmousedev;
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};
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int lmsprobe __P((struct device *, struct cfdata *, void *));
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void lmsattach __P((struct device *, struct device *, void *));
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int lmsintr __P((void *));
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struct cfattach lms_ca = {
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sizeof(struct lms_softc), lmsprobe, lmsattach
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};
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int lms_enable __P((void *));
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int lms_ioctl __P((void *, u_long, caddr_t, int, struct proc *));
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void lms_disable __P((void *));
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const struct wsmouse_accessops lms_accessops = {
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lms_enable,
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lms_ioctl,
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lms_disable,
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};
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int
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lmsprobe(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 isa_attach_args *ia = aux;
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bus_space_tag_t iot = ia->ia_iot;
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bus_space_handle_t ioh;
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int rv;
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/* Disallow wildcarded i/o base. */
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if (ia->ia_iobase == ISACF_PORT_DEFAULT)
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return 0;
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/* Map the i/o space. */
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if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh))
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return 0;
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rv = 0;
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/* Configure and check for port present. */
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bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91);
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delay(10);
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bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c);
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delay(10);
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if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c)
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goto out;
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bus_space_write_1(iot, ioh, LMS_SIGN, 0x50);
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delay(10);
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if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50)
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goto out;
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/* Disable interrupts. */
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bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10);
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rv = 1;
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ia->ia_iosize = LMS_NPORTS;
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ia->ia_msize = 0;
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out:
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bus_space_unmap(iot, ioh, LMS_NPORTS);
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return rv;
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}
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void
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lmsattach(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 lms_softc *sc = (void *)self;
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struct isa_attach_args *ia = aux;
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bus_space_tag_t iot = ia->ia_iot;
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bus_space_handle_t ioh;
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struct wsmousedev_attach_args a;
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printf("\n");
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if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) {
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printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
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return;
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}
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/* Other initialization was done by lmsprobe. */
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sc->sc_iot = iot;
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sc->sc_ioh = ioh;
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sc->sc_enabled = 0;
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sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE,
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IPL_TTY, lmsintr, sc);
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a.accessops = &lms_accessops;
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a.accesscookie = sc;
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/*
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* Attach the wsmouse, saving a handle to it.
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* Note that we don't need to check this pointer against NULL
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* here or in psmintr, because if this fails lms_enable() will
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* never be called, so lmsintr() will never be called.
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*/
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sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint);
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}
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int
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lms_enable(v)
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void *v;
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{
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struct lms_softc *sc = v;
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if (sc->sc_enabled)
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return EBUSY;
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sc->sc_enabled = 1;
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sc->oldbuttons = 0;
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/* Enable interrupts. */
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0);
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return 0;
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}
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void
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lms_disable(v)
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void *v;
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{
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struct lms_softc *sc = v;
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/* Disable interrupts. */
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10);
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sc->sc_enabled = 0;
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}
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int
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lms_ioctl(v, cmd, data, flag, p)
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void *v;
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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 proc *p;
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{
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#if 0
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struct lms_softc *sc = v;
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#endif
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switch (cmd) {
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case WSMOUSEIO_GTYPE:
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*(u_int *)data = WSMOUSE_TYPE_LMS;
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return (0);
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}
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return (-1);
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}
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int
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lmsintr(arg)
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void *arg;
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{
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struct lms_softc *sc = arg;
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bus_space_tag_t iot = sc->sc_iot;
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bus_space_handle_t ioh = sc->sc_ioh;
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u_char hi, lo;
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signed char dx, dy;
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u_int buttons;
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int changed;
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if (!sc->sc_enabled)
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/* Interrupts are not expected. */
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return 0;
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bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab);
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hi = bus_space_read_1(iot, ioh, LMS_DATA);
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bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90);
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lo = bus_space_read_1(iot, ioh, LMS_DATA);
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dx = ((hi & 0x0f) << 4) | (lo & 0x0f);
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/* Bounding at -127 avoids a bug in XFree86. */
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dx = (dx == -128) ? -127 : dx;
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bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0);
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hi = bus_space_read_1(iot, ioh, LMS_DATA);
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bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0);
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lo = bus_space_read_1(iot, ioh, LMS_DATA);
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dy = ((hi & 0x0f) << 4) | (lo & 0x0f);
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dy = (dy == -128) ? 127 : -dy;
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bus_space_write_1(iot, ioh, LMS_CNTRL, 0);
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buttons = ((hi & 0x80) ? 0 : 0x1) |
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((hi & 0x40) ? 0 : 0x2) |
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((hi & 0x20) ? 0 : 0x4);
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changed = (buttons ^ sc->oldbuttons);
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sc->oldbuttons = buttons;
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if (dx || dy || changed)
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wsmouse_input(sc->sc_wsmousedev,
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buttons, dx, dy, 0, WSMOUSE_INPUT_DELTA);
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return -1;
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}
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