383 lines
8.6 KiB
C
383 lines
8.6 KiB
C
/* $NetBSD: lms.c,v 1.31 1997/10/19 19:00:24 thorpej Exp $ */
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/*-
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* Copyright (c) 1993, 1994 Charles 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/kernel.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/malloc.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/file.h>
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#include <sys/select.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <sys/device.h>
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#include <sys/poll.h>
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#include <machine/cpu.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <machine/mouse.h>
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#include <machine/conf.h>
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#include <dev/isa/isavar.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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#define LMS_CHUNK 128 /* chunk size for read */
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#define LMS_BSIZE 1020 /* buffer size */
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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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struct clist sc_q;
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struct selinfo sc_rsel;
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u_char sc_state; /* mouse driver state */
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#define LMS_OPEN 0x01 /* device is open */
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#define LMS_ASLP 0x02 /* waiting for mouse data */
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u_char sc_status; /* mouse button status */
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int sc_x, sc_y; /* accumulated motion in the X,Y axis */
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};
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int lmsprobe __P((struct device *, void *, 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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struct cfdriver lms_cd = {
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NULL, "lms", DV_TTY
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};
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#define LMSUNIT(dev) (minor(dev))
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int
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lmsprobe(parent, match, aux)
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struct device *parent;
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void *match, *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 == IOBASEUNK)
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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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printf("\n");
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/* Other initialization was done by lmsprobe. */
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sc->sc_iot = ia->ia_iot;
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if (bus_space_map(sc->sc_iot, ia->ia_iobase, LMS_NPORTS, 0,
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&sc->sc_ioh))
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panic("lmsattach: couldn't map I/O ports");
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sc->sc_state = 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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}
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int
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lmsopen(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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int unit = LMSUNIT(dev);
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struct lms_softc *sc;
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if (unit >= lms_cd.cd_ndevs)
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return ENXIO;
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sc = lms_cd.cd_devs[unit];
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if (!sc)
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return ENXIO;
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if (sc->sc_state & LMS_OPEN)
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return EBUSY;
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if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1)
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return ENOMEM;
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sc->sc_state |= LMS_OPEN;
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sc->sc_status = 0;
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sc->sc_x = sc->sc_y = 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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int
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lmsclose(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)];
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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_state &= ~LMS_OPEN;
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clfree(&sc->sc_q);
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return 0;
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}
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int
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lmsread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)];
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int s;
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int error = 0;
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size_t length;
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u_char buffer[LMS_CHUNK];
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/* Block until mouse activity occured. */
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s = spltty();
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while (sc->sc_q.c_cc == 0) {
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if (flag & IO_NDELAY) {
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splx(s);
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return EWOULDBLOCK;
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}
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sc->sc_state |= LMS_ASLP;
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error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0);
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if (error) {
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sc->sc_state &= ~LMS_ASLP;
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splx(s);
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return error;
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}
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}
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splx(s);
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/* Transfer as many chunks as possible. */
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while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) {
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length = min(sc->sc_q.c_cc, uio->uio_resid);
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if (length > sizeof(buffer))
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length = sizeof(buffer);
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/* Remove a small chunk from the input queue. */
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(void) q_to_b(&sc->sc_q, buffer, length);
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/* Copy the data to the user process. */
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if ((error = uiomove(buffer, length, uio)) != 0)
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break;
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}
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return error;
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}
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int
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lmsioctl(dev, cmd, addr, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t addr;
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int flag;
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struct proc *p;
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{
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struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)];
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struct mouseinfo info;
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int s;
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int error;
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switch (cmd) {
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case MOUSEIOCREAD:
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s = spltty();
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info.status = sc->sc_status;
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if (sc->sc_x || sc->sc_y)
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info.status |= MOVEMENT;
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if (sc->sc_x > 127)
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info.xmotion = 127;
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else if (sc->sc_x < -127)
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/* Bounding at -127 avoids a bug in XFree86. */
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info.xmotion = -127;
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else
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info.xmotion = sc->sc_x;
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if (sc->sc_y > 127)
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info.ymotion = 127;
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else if (sc->sc_y < -127)
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info.ymotion = -127;
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else
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info.ymotion = sc->sc_y;
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/* Reset historical information. */
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sc->sc_x = sc->sc_y = 0;
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sc->sc_status &= ~BUTCHNGMASK;
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ndflush(&sc->sc_q, sc->sc_q.c_cc);
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splx(s);
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error = copyout(&info, addr, sizeof(struct mouseinfo));
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break;
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default:
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error = EINVAL;
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break;
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}
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return error;
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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, buttons, changed;
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char dx, dy;
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u_char buffer[5];
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if ((sc->sc_state & LMS_OPEN) == 0)
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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 >> 5) & 0x07;
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changed = ((buttons ^ sc->sc_status) & 0x07) << 3;
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sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed;
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if (dx || dy || changed) {
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/* Update accumulated movements. */
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sc->sc_x += dx;
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sc->sc_y += dy;
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/* Add this event to the queue. */
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buffer[0] = 0x80 | (buttons ^ BUTSTATMASK);
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buffer[1] = dx;
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buffer[2] = dy;
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buffer[3] = buffer[4] = 0;
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(void) b_to_q(buffer, sizeof buffer, &sc->sc_q);
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if (sc->sc_state & LMS_ASLP) {
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sc->sc_state &= ~LMS_ASLP;
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wakeup((caddr_t)sc);
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}
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selwakeup(&sc->sc_rsel);
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}
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return -1;
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}
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int
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lmspoll(dev, events, p)
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dev_t dev;
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int events;
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struct proc *p;
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{
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struct lms_softc *sc = lms_cd.cd_devs[LMSUNIT(dev)];
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int revents = 0;
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int s = spltty();
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if (events & (POLLIN | POLLRDNORM))
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if (sc->sc_q.c_cc > 0)
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revents |= events & (POLLIN | POLLRDNORM);
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else
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selrecord(p, &sc->sc_rsel);
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splx(s);
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return (revents);
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}
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