391 lines
9.4 KiB
C
391 lines
9.4 KiB
C
/*
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* Copyright (c) 2001, 2002 Greg Hughes (greg@NetBSD.org). All rights reserved.
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* Copyright (c) 1999 PocketBSD Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* Wscons mouse driver for DSIU TrackPoint on IBM WorkPad z50 by
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* Greg Hughes (greg@NetBSD.org).
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*
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* Template for interrupt/device registration taken from vrdsu.c.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: vrdsiu_mouse.c,v 1.6 2003/12/04 13:05:16 keihan Exp $");
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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 <dev/wscons/wsconsio.h>
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#include <dev/wscons/wsmousevar.h>
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#include <machine/bus.h>
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#include <machine/platid.h>
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#include <machine/platid_mask.h>
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#include <hpcmips/vr/vripvar.h>
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#include <hpcmips/vr/vrdsiureg.h>
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#include <hpcmips/vr/cmureg.h>
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enum vrdsiu_mouse_stat {
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VRDSIU_MOUSE_STAT_DISABLE,
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VRDSIU_MOUSE_STAT_ENABLE
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};
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enum vrdsiu_ps2_input_state {
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VRDSIU_PS2_INPUT_STATE_BYTE0,
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VRDSIU_PS2_INPUT_STATE_BYTE1,
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VRDSIU_PS2_INPUT_STATE_BYTE2
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};
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struct vrdsiu_softc {
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struct device sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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int sc_unit;
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void *sc_handler;
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vrip_chipset_tag_t sc_vrip;
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enum vrdsiu_mouse_stat sc_mouse_stat;
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struct device *sc_wsmousedev;
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};
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static int asimOld = 0;
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static int vrdsiu_match __P((struct device *, struct cfdata *, void *));
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static void vrdsiu_attach __P((struct device *, struct device *, void *));
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static void vrdsiu_write __P((struct vrdsiu_softc *, int, unsigned short));
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static unsigned short vrdsiu_read __P((struct vrdsiu_softc *, int));
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/* Interrupt handlers */
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static int vrdsiu_intr __P((void *));
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static void vrdsiu_mouse_intr __P((struct vrdsiu_softc *));
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/* Enable/disable DSIU handling */
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static int vrdsiu_mouse_enable __P((void *));
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static int vrdsiu_mouse_ioctl __P((void *, u_long, caddr_t, int, struct proc *));
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static void vrdsiu_mouse_disable __P((void *));
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/* wsmouse access ops */
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const struct wsmouse_accessops vrdsiu_accessops = {
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vrdsiu_mouse_enable,
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vrdsiu_mouse_ioctl,
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vrdsiu_mouse_disable
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};
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CFATTACH_DECL(vrdsiu_mouse, sizeof(struct vrdsiu_softc),
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vrdsiu_match, vrdsiu_attach, NULL, NULL);
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static inline void
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vrdsiu_write(sc, port, val)
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struct vrdsiu_softc *sc;
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int port;
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unsigned short val;
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{
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bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
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}
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static inline unsigned short
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vrdsiu_read(sc, port)
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struct vrdsiu_softc *sc;
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int port;
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{
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return bus_space_read_2(sc->sc_iot, sc->sc_ioh, port);
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}
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static int
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vrdsiu_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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return 1;
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}
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static void
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vrdsiu_attach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct vrdsiu_softc *sc = (struct vrdsiu_softc *)self;
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struct vrip_attach_args *va = aux;
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struct wsmousedev_attach_args wsmaa;
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int res;
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bus_space_tag_t iot = va->va_iot;
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if (va->va_parent_ioh != 0)
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res = bus_space_subregion(iot, va->va_parent_ioh, va->va_addr,
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va->va_size, &sc->sc_ioh);
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else
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res = bus_space_map(iot, va->va_addr, va->va_size, 0,
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&sc->sc_ioh);
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if (res != 0) {
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printf(": can't map bus space\n");
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return;
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}
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sc->sc_iot = iot;
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sc->sc_unit = va->va_unit;
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sc->sc_vrip = va->va_vc;
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/* install interrupt handler and enable interrupt */
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if (!(sc->sc_handler =
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vrip_intr_establish(sc->sc_vrip, sc->sc_unit, 0, IPL_TTY,
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vrdsiu_intr, sc))) {
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printf(": can't map interrupt line\n");
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return;
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}
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/* disable the handler initially */
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vrdsiu_mouse_disable(sc);
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printf("\n");
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/* attach the mouse */
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wsmaa.accessops = &vrdsiu_accessops;
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wsmaa.accesscookie = sc;
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sc->sc_wsmousedev = config_found(self, &wsmaa, wsmousedevprint);
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/*
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* TODO: Initialize the DSIU ourselves.
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* We currently assume WinCE has set up the DSIU properly
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*/
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asimOld = vrdsiu_read(sc, DSIUASIM00_REG_W);
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/* supply clock to the DSIU */
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vrip_power(sc->sc_vrip, sc->sc_unit, 1);
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}
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int
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vrdsiu_mouse_enable(v)
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void *v;
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{
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struct vrdsiu_softc *sc = v;
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/* ensure the DSIU mouse is currently disabled! */
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if (sc->sc_mouse_stat != VRDSIU_MOUSE_STAT_DISABLE)
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return EBUSY;
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/* enable the DSIU mouse */
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sc->sc_mouse_stat = VRDSIU_MOUSE_STAT_ENABLE;
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/* unmask interrupts */
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vrip_intr_setmask2(sc->sc_vrip, sc->sc_handler, (1 << 8) | (1 << 9) | (1 << 10), 1);
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vrip_power(sc->sc_vrip, sc->sc_unit, 1);
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return 0;
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}
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void
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vrdsiu_mouse_disable(v)
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void *v;
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{
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struct vrdsiu_softc *sc = v;
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/* mask interrupts */
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vrip_intr_setmask2(sc->sc_vrip, sc->sc_handler, (1 << 8) | (1 << 9) | (1 << 10), 0);
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/* disable the DSIU mouse */
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sc->sc_mouse_stat = VRDSIU_MOUSE_STAT_DISABLE;
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}
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int
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vrdsiu_mouse_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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/*struct vrdsiu_softc *sc = v;*/
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switch (cmd)
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{
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case WSMOUSEIO_GTYPE:
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*(u_int *)data = WSMOUSE_TYPE_PS2;
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break;
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case WSMOUSEIO_SRES:
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/*
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* TODO: Handle setting mouse resolution
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*/
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break;
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default:
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return -1;
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}
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return 0;
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}
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int
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vrdsiu_intr(arg)
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void *arg;
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{
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struct vrdsiu_softc *sc = arg;
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vrdsiu_mouse_intr(sc);
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return 0;
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}
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/*
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* PS/2 protocol defines
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*/
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#define PS2_L_BUTTON_MASK (1 << 0)
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#define PS2_R_BUTTON_MASK (1 << 1)
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#define PS2_M_BUTTON_MASK (1 << 2)
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#define PS2_BYTE0_BIT3_MASK (1 << 3)
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#define PS2_DX_SIGN_MASK (1 << 4)
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#define PS2_DY_SIGN_MASK (1 << 5)
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#define PS2_DX_OVERFLOW_MASK (1 << 6)
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#define PS2_DY_OVERFLOW_MASK (1 << 7)
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/*
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* WSCONS defines
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*/
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#define WSC_L_BUTTON 0x01
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#define WSC_M_BUTTON 0x02
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#define WSC_R_BUTTON 0x04
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void
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vrdsiu_mouse_intr(sc)
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struct vrdsiu_softc *sc;
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{
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u_int intrReason;
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unsigned char b;
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static int dx;
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static int dy;
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static u_char buttons;
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static enum vrdsiu_ps2_input_state ps2_state = 0;
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/* What caused the interrupt? */
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intrReason = vrdsiu_read(sc, DSIUINTR0_REG_W);
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/*
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* TODO: Check for error conditions; specifically need to handle
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* overruns (which currently mess up the mouse).
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*/
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/* disable reception */
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vrdsiu_write(sc, DSIUASIM00_REG_W, asimOld & ~DSIUASIM00_RXE0);
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if (intrReason & DSIUINTR0_INTSER0)
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ps2_state = 0;
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/* Ignore everything except receive notifications */
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if ((intrReason & DSIUINTR0_INTSR0) == 0)
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goto done;
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/* read from DSIU */
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b = (unsigned char)vrdsiu_read(sc, DSIURXB0L_REG_W);
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/* check if the DSIU is enabled */
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if (sc->sc_mouse_stat == VRDSIU_MOUSE_STAT_DISABLE)
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{
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/* Throw away input to keep the DSIU's buffer clean */
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goto done;
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}
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/*
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* PS/2 protocol interpretation
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*
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* A PS/2 packet consists of 3 bytes. We read them in, in order, and
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* piece together the mouse info.
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*
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* Byte 0 contains button info and dx/dy signedness
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* Byte 1 contains dx info
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* Byte 2 contains dy info
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*
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* Please see PS/2 specs for detailed information; brief descriptions
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* are provided below.
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*
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* PS/2 mouse specs for the TrackPoint from IBM's TrackPoint Engineering
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* Specification Version 4.0.
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*/
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switch (ps2_state)
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{
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case VRDSIU_PS2_INPUT_STATE_BYTE0:
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/* Bit 3 of byte 0 is always 1; we use that info to sync input */
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if ((b & PS2_BYTE0_BIT3_MASK) == 0)
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goto done;
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if (b & (PS2_M_BUTTON_MASK | PS2_DX_OVERFLOW_MASK |
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PS2_DY_OVERFLOW_MASK))
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goto done;
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/* Extract button state */
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buttons = ((b & PS2_L_BUTTON_MASK) ? WSC_L_BUTTON : 0)
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| ((b & PS2_M_BUTTON_MASK) ? WSC_M_BUTTON : 0)
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| ((b & PS2_R_BUTTON_MASK) ? WSC_R_BUTTON : 0);
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/* Extract dx/dy signedness -- 9-bit 2's comp */
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/* dx = (b & PS2_DX_SIGN_MASK) ? 0xFFFFFFFF : 0;
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dy = (b & PS2_DY_SIGN_MASK) ? 0xFFFFFFFF : 0; */
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ps2_state = VRDSIU_PS2_INPUT_STATE_BYTE1;
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break;
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case VRDSIU_PS2_INPUT_STATE_BYTE1:
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/* put in the lower 8 bits of dx */
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dx = (signed char)b;
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if (dx == -128)
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dx = -127;
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ps2_state = VRDSIU_PS2_INPUT_STATE_BYTE2;
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break;
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case VRDSIU_PS2_INPUT_STATE_BYTE2:
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/* put in the lower 8 bits of dy */
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dy = (signed char)b;
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if (dy == -128)
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dy = -127;
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/* We now have a complete packet; send to wscons */
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wsmouse_input(sc->sc_wsmousedev,
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buttons,
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dx,
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dy,
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0,
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WSMOUSE_INPUT_DELTA);
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ps2_state = VRDSIU_PS2_INPUT_STATE_BYTE0;
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break;
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}
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done:
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/* clear the interrupt */
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vrdsiu_write(sc, DSIUINTR0_REG_W, intrReason);
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/* enable reception */
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vrdsiu_write(sc, DSIUASIM00_REG_W, asimOld | DSIUASIM00_RXE0);
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}
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