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/* $OpenBSD: mms.c,v 1.19 2007/04/10 22:37:17 miod Exp $ */
/* $NetBSD: mms.c,v 1.35 2000/01/08 02:57:25 takemura Exp $ */
/*-
* Copyright (c) 1993, 1994 Charles M. Hannum.
* Copyright (c) 1992, 1993 Erik Forsberg.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY ``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 I 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <dev/isa/isavar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsmousevar.h>
#define MMS_ADDR 0 /* offset for register select */
#define MMS_DATA 1 /* offset for InPort data */
#define MMS_IDENT 2 /* offset for identification register */
#define MMS_NPORTS 4
struct mms_softc { /* driver status information */
struct device sc_dev;
void *sc_ih;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
int sc_enabled; /* device is open */
struct device *sc_wsmousedev;
};
int mmsprobe(struct device *, void *, void *);
void mmsattach(struct device *, struct device *, void *);
int mmsintr(void *);
struct cfattach mms_ca = {
sizeof(struct mms_softc), mmsprobe, mmsattach
};
int mms_enable(void *);
int mms_ioctl(void *, u_long, caddr_t, int, struct proc *);
void mms_disable(void *);
const struct wsmouse_accessops mms_accessops = {
mms_enable,
mms_ioctl,
mms_disable,
};
int
mmsprobe(struct device *parent, void *match, void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
int rv;
/* Disallow wildcarded i/o address. */
if (ia->ia_iobase == IOBASEUNK)
return 0;
/* Map the i/o space. */
if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh))
return 0;
rv = 0;
/* Read identification register to see if present */
if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde)
goto out;
/* Seems it was there; reset. */
bus_space_write_1(iot, ioh, MMS_ADDR, 0x87);
rv = 1;
ia->ia_iosize = MMS_NPORTS;
ia->ia_msize = 0;
out:
bus_space_unmap(iot, ioh, MMS_NPORTS);
return rv;
}
void
mmsattach(struct device *parent, struct device *self, void *aux)
{
struct mms_softc *sc = (void *)self;
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
struct wsmousedev_attach_args a;
printf("\n");
if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) {
printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
return;
}
/* Other initialization was done by mmsprobe. */
sc->sc_iot = iot;
sc->sc_ioh = ioh;
sc->sc_enabled = 0;
sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE,
IPL_TTY, mmsintr, sc, sc->sc_dev.dv_xname);
a.accessops = &mms_accessops;
a.accesscookie = sc;
/*
* Attach the wsmouse, saving a handle to it.
* Note that we don't need to check this pointer against NULL
* here or in psmintr, because if this fails lms_enable() will
* never be called, so lmsintr() will never be called.
*/
sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint);
}
int
mms_enable(void *v)
{
struct mms_softc *sc = v;
if (sc->sc_enabled)
return EBUSY;
sc->sc_enabled = 1;
/* Enable interrupts. */
bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09);
return 0;
}
void
mms_disable(void *v)
{
struct mms_softc *sc = v;
/* Disable interrupts. */
bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87);
sc->sc_enabled = 0;
}
int
mms_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
{
#if 0
struct mms_softc *sc = v;
#endif
switch (cmd) {
case WSMOUSEIO_GTYPE:
*(u_int *)data = WSMOUSE_TYPE_MMS;
return (0);
}
return (-1);
}
int
mmsintr(void *arg)
{
struct mms_softc *sc = arg;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
u_char status;
signed char dx, dy;
u_int buttons;
int changed;
if (!sc->sc_enabled)
/* Interrupts are not expected. */
return 0;
/* Freeze InPort registers (disabling interrupts). */
bus_space_write_1(iot, ioh, MMS_ADDR, 0x07);
bus_space_write_1(iot, ioh, MMS_DATA, 0x29);
bus_space_write_1(iot, ioh, MMS_ADDR, 0x00);
status = bus_space_read_1(iot, ioh, MMS_DATA);
if (status & 0x40) {
bus_space_write_1(iot, ioh, MMS_ADDR, 1);
dx = bus_space_read_1(iot, ioh, MMS_DATA);
/* Bounding at -127 avoids a bug in XFree86. */
dx = (dx == -128) ? -127 : dx;
bus_space_write_1(iot, ioh, MMS_ADDR, 2);
dy = bus_space_read_1(iot, ioh, MMS_DATA);
dy = (dy == -128) ? 127 : -dy;
} else
dx = dy = 0;
/* Unfreeze InPort registers (reenabling interrupts). */
bus_space_write_1(iot, ioh, MMS_ADDR, 0x07);
bus_space_write_1(iot, ioh, MMS_DATA, 0x09);
buttons = ((status & 0x04) ? 0x1 : 0) |
((status & 0x02) ? 0x2 : 0) |
((status & 0x01) ? 0x4 : 0);
changed = status & 0x38;
if (dx || dy || changed)
wsmouse_input(sc->sc_wsmousedev,
buttons, dx, dy, 0, 0, WSMOUSE_INPUT_DELTA);
return -1;
}
struct cfdriver mms_cd = {
NULL, "mms", DV_DULL
};
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