NetBSD-5.0.2/sys/arch/i386/isa/mms.c
/* $NetBSD: mms.c,v 1.51 2008/07/09 20:54:13 joerg 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mms.c,v 1.51 2008/07/09 20:54:13 joerg Exp $");
#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 */
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;
};
static int mmsprobe(device_t, cfdata_t, void *);
static void mmsattach(device_t, device_t, void *);
static int mmsintr(void *);
CFATTACH_DECL_NEW(mms, sizeof(struct mms_softc),
mmsprobe, mmsattach, NULL, NULL);
static int mms_enable(void *);
static int mms_ioctl(void *, u_long, void *, int, struct lwp *);
static void mms_disable(void *);
static const struct wsmouse_accessops mms_accessops = {
mms_enable,
mms_ioctl,
mms_disable,
};
static int
mmsprobe(device_t parent, cfdata_t match, void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
int rv;
if (ia->ia_nio < 1)
return (0);
if (ia->ia_nirq < 1)
return (0);
if (ISA_DIRECT_CONFIG(ia))
return (0);
/* Disallow wildcarded i/o address. */
if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
return 0;
if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
return 0;
/* Map the i/o space. */
if (bus_space_map(iot, ia->ia_io[0].ir_addr, 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_nio = 1;
ia->ia_io[0].ir_size = MMS_NPORTS;
ia->ia_nirq = 1;
ia->ia_niomem = 0;
ia->ia_ndrq = 0;
out:
bus_space_unmap(iot, ioh, MMS_NPORTS);
return rv;
}
static void
mmsattach(device_t parent, device_t self, void *aux)
{
struct mms_softc *sc = device_private(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;
aprint_naive(": Mouse\n");
aprint_normal(": Microsoft Mouse\n");
if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) {
aprint_error_dev(self, "can't map i/o space\n");
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[0].ir_irq,
IST_PULSE, IPL_TTY, mmsintr, sc);
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);
}
static 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;
}
static 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;
}
static int
mms_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
{
#if 0
struct mms_softc *sc = v;
#endif
switch (cmd) {
case WSMOUSEIO_GTYPE:
*(u_int *)data = WSMOUSE_TYPE_MMS;
return (0);
}
return (EPASSTHROUGH);
}
static 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;
}