/* $NetBSD: lms.c,v 1.17 1994/11/18 22:03:26 mycroft Exp $ */ /*- * Copyright (c) 1993, 1994 Charles 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define LMS_DATA 0 /* offset for data port, read-only */ #define LMS_SIGN 1 /* offset for signature port, read-write */ #define LMS_INTR 2 /* offset for interrupt port, read-only */ #define LMS_CNTRL 2 /* offset for control port, write-only */ #define LMS_CONFIG 3 /* for configuration port, read-write */ #define LMS_NPORTS 4 #define LMS_CHUNK 128 /* chunk size for read */ #define LMS_BSIZE 1020 /* buffer size */ struct lms_softc { /* driver status information */ struct device sc_dev; struct intrhand sc_ih; struct clist sc_q; struct selinfo sc_rsel; int sc_iobase; /* I/O port base */ u_char sc_state; /* mouse driver state */ #define LMS_OPEN 0x01 /* device is open */ #define LMS_ASLP 0x02 /* waiting for mouse data */ u_char sc_status; /* mouse button status */ int sc_x, sc_y; /* accumulated motion in the X,Y axis */ }; int lmsprobe __P((struct device *, void *, void *)); void lmsattach __P((struct device *, struct device *, void *)); int lmsintr __P((struct lms_softc *)); struct cfdriver lmscd = { NULL, "lms", lmsprobe, lmsattach, DV_TTY, sizeof(struct lms_softc) }; #define LMSUNIT(dev) (minor(dev)) int lmsprobe(parent, match, aux) struct device *parent; void *match, *aux; { struct isa_attach_args *ia = aux; int iobase = ia->ia_iobase; /* Configure and check for port present. */ outb(iobase + LMS_CONFIG, 0x91); delay(10); outb(iobase + LMS_SIGN, 0x0c); delay(10); if (inb(iobase + LMS_SIGN) != 0x0c) return 0; outb(iobase + LMS_SIGN, 0x50); delay(10); if (inb(iobase + LMS_SIGN) != 0x50) return 0; /* Disable interrupts. */ outb(iobase + LMS_CNTRL, 0x10); ia->ia_iosize = LMS_NPORTS; ia->ia_msize = 0; return 1; } void lmsattach(parent, self, aux) struct device *parent, *self; void *aux; { struct lms_softc *sc = (void *)self; struct isa_attach_args *ia = aux; int iobase = ia->ia_iobase; printf("\n"); /* Other initialization was done by lmsprobe. */ sc->sc_iobase = iobase; sc->sc_state = 0; sc->sc_ih.ih_fun = lmsintr; sc->sc_ih.ih_arg = sc; sc->sc_ih.ih_level = IPL_NONE; intr_establish(ia->ia_irq, &sc->sc_ih); } int lmsopen(dev, flag) dev_t dev; int flag; { int unit = LMSUNIT(dev); struct lms_softc *sc; if (unit >= lmscd.cd_ndevs) return ENXIO; sc = lmscd.cd_devs[unit]; if (!sc) return ENXIO; if (sc->sc_state & LMS_OPEN) return EBUSY; if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1) return ENOMEM; sc->sc_state |= LMS_OPEN; sc->sc_status = 0; sc->sc_x = sc->sc_y = 0; /* Enable interrupts. */ outb(sc->sc_iobase + LMS_CNTRL, 0); return 0; } int lmsclose(dev, flag) dev_t dev; int flag; { struct lms_softc *sc = lmscd.cd_devs[LMSUNIT(dev)]; /* Disable interrupts. */ outb(sc->sc_iobase + LMS_CNTRL, 0x10); sc->sc_state &= ~LMS_OPEN; clfree(&sc->sc_q); return 0; } int lmsread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct lms_softc *sc = lmscd.cd_devs[LMSUNIT(dev)]; int s; int error; size_t length; u_char buffer[LMS_CHUNK]; /* Block until mouse activity occured. */ s = spltty(); while (sc->sc_q.c_cc == 0) { if (flag & IO_NDELAY) { splx(s); return EWOULDBLOCK; } sc->sc_state |= LMS_ASLP; if (error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0)) { sc->sc_state &= ~LMS_ASLP; splx(s); return error; } } splx(s); /* Transfer as many chunks as possible. */ while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { length = min(sc->sc_q.c_cc, uio->uio_resid); if (length > sizeof(buffer)) length = sizeof(buffer); /* Remove a small chunk from the input queue. */ (void) q_to_b(&sc->sc_q, buffer, length); /* Copy the data to the user process. */ if (error = uiomove(buffer, length, uio)) break; } return error; } int lmsioctl(dev, cmd, addr, flag) dev_t dev; u_long cmd; caddr_t addr; int flag; { struct lms_softc *sc = lmscd.cd_devs[LMSUNIT(dev)]; struct mouseinfo info; int s; int error; switch (cmd) { case MOUSEIOCREAD: s = spltty(); info.status = sc->sc_status; if (sc->sc_x || sc->sc_y) info.status |= MOVEMENT; if (sc->sc_x > 127) info.xmotion = 127; else if (sc->sc_x < -127) /* Bounding at -127 avoids a bug in XFree86. */ info.xmotion = -127; else info.xmotion = sc->sc_x; if (sc->sc_y > 127) info.ymotion = 127; else if (sc->sc_y < -127) info.ymotion = -127; else info.ymotion = sc->sc_y; /* Reset historical information. */ sc->sc_x = sc->sc_y = 0; sc->sc_status &= ~BUTCHNGMASK; ndflush(&sc->sc_q, sc->sc_q.c_cc); splx(s); error = copyout(&info, addr, sizeof(struct mouseinfo)); break; default: error = EINVAL; break; } return error; } int lmsintr(sc) struct lms_softc *sc; { int iobase = sc->sc_iobase; u_char hi, lo, buttons, changed; char dx, dy; u_char buffer[5]; if ((sc->sc_state & LMS_OPEN) == 0) /* Interrupts are not expected. */ return 0; outb(iobase + LMS_CNTRL, 0xab); hi = inb(iobase + LMS_DATA); outb(iobase + LMS_CNTRL, 0x90); lo = inb(iobase + LMS_DATA); dx = ((hi & 0x0f) << 4) | (lo & 0x0f); /* Bounding at -127 avoids a bug in XFree86. */ dx = (dx == -128) ? -127 : dx; outb(iobase + LMS_CNTRL, 0xf0); hi = inb(iobase + LMS_DATA); outb(iobase + LMS_CNTRL, 0xd0); lo = inb(iobase + LMS_DATA); dy = ((hi & 0x0f) << 4) | (lo & 0x0f); dy = (dy == -128) ? 127 : -dy; outb(iobase + LMS_CNTRL, 0); buttons = (~hi >> 5) & 0x07; changed = ((buttons ^ sc->sc_status) & 0x07) << 3; sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed; if (dx || dy || changed) { /* Update accumulated movements. */ sc->sc_x += dx; sc->sc_y += dy; /* Add this event to the queue. */ buffer[0] = 0x80 | (buttons ^ BUTSTATMASK); buffer[1] = dx; buffer[2] = dy; buffer[3] = buffer[4] = 0; (void) b_to_q(buffer, sizeof buffer, &sc->sc_q); if (sc->sc_state & LMS_ASLP) { sc->sc_state &= ~LMS_ASLP; wakeup((caddr_t)sc); } selwakeup(&sc->sc_rsel); } return -1; } int lmsselect(dev, rw, p) dev_t dev; int rw; struct proc *p; { struct lms_softc *sc = lmscd.cd_devs[LMSUNIT(dev)]; int s; int ret; if (rw == FWRITE) return 0; s = spltty(); if (!sc->sc_q.c_cc) { selrecord(p, &sc->sc_rsel); ret = 0; } else ret = 1; splx(s); return ret; }