/* $NetBSD: mms.c,v 1.53 2011/07/01 18:11:24 dyoung 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 __KERNEL_RCSID(0, "$NetBSD: mms.c,v 1.53 2011/07/01 18:11:24 dyoung Exp $"); #include #include #include #include #include #include #include #include #include #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 */ device_t 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; }