Annotation of sys/arch/i386/isa/mms.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: mms.c,v 1.19 2007/04/10 22:37:17 miod Exp $ */
! 2: /* $NetBSD: mms.c,v 1.35 2000/01/08 02:57:25 takemura Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1993, 1994 Charles M. Hannum.
! 6: * Copyright (c) 1992, 1993 Erik Forsberg.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: *
! 15: * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
! 16: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
! 17: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
! 18: * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
! 19: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 20: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
! 21: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
! 22: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
! 23: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
! 24: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 25: */
! 26:
! 27: #include <sys/param.h>
! 28: #include <sys/systm.h>
! 29: #include <sys/ioctl.h>
! 30: #include <sys/device.h>
! 31:
! 32: #include <machine/intr.h>
! 33: #include <machine/bus.h>
! 34:
! 35: #include <dev/isa/isavar.h>
! 36:
! 37: #include <dev/wscons/wsconsio.h>
! 38: #include <dev/wscons/wsmousevar.h>
! 39:
! 40: #define MMS_ADDR 0 /* offset for register select */
! 41: #define MMS_DATA 1 /* offset for InPort data */
! 42: #define MMS_IDENT 2 /* offset for identification register */
! 43: #define MMS_NPORTS 4
! 44:
! 45: struct mms_softc { /* driver status information */
! 46: struct device sc_dev;
! 47: void *sc_ih;
! 48:
! 49: bus_space_tag_t sc_iot;
! 50: bus_space_handle_t sc_ioh;
! 51:
! 52: int sc_enabled; /* device is open */
! 53:
! 54: struct device *sc_wsmousedev;
! 55: };
! 56:
! 57: int mmsprobe(struct device *, void *, void *);
! 58: void mmsattach(struct device *, struct device *, void *);
! 59: int mmsintr(void *);
! 60:
! 61: struct cfattach mms_ca = {
! 62: sizeof(struct mms_softc), mmsprobe, mmsattach
! 63: };
! 64:
! 65: int mms_enable(void *);
! 66: int mms_ioctl(void *, u_long, caddr_t, int, struct proc *);
! 67: void mms_disable(void *);
! 68:
! 69: const struct wsmouse_accessops mms_accessops = {
! 70: mms_enable,
! 71: mms_ioctl,
! 72: mms_disable,
! 73: };
! 74:
! 75: int
! 76: mmsprobe(struct device *parent, void *match, void *aux)
! 77: {
! 78: struct isa_attach_args *ia = aux;
! 79: bus_space_tag_t iot = ia->ia_iot;
! 80: bus_space_handle_t ioh;
! 81: int rv;
! 82:
! 83: /* Disallow wildcarded i/o address. */
! 84: if (ia->ia_iobase == IOBASEUNK)
! 85: return 0;
! 86:
! 87: /* Map the i/o space. */
! 88: if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh))
! 89: return 0;
! 90:
! 91: rv = 0;
! 92:
! 93: /* Read identification register to see if present */
! 94: if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde)
! 95: goto out;
! 96:
! 97: /* Seems it was there; reset. */
! 98: bus_space_write_1(iot, ioh, MMS_ADDR, 0x87);
! 99:
! 100: rv = 1;
! 101: ia->ia_iosize = MMS_NPORTS;
! 102: ia->ia_msize = 0;
! 103:
! 104: out:
! 105: bus_space_unmap(iot, ioh, MMS_NPORTS);
! 106: return rv;
! 107: }
! 108:
! 109: void
! 110: mmsattach(struct device *parent, struct device *self, void *aux)
! 111: {
! 112: struct mms_softc *sc = (void *)self;
! 113: struct isa_attach_args *ia = aux;
! 114: bus_space_tag_t iot = ia->ia_iot;
! 115: bus_space_handle_t ioh;
! 116: struct wsmousedev_attach_args a;
! 117:
! 118: printf("\n");
! 119:
! 120: if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) {
! 121: printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
! 122: return;
! 123: }
! 124:
! 125: /* Other initialization was done by mmsprobe. */
! 126: sc->sc_iot = iot;
! 127: sc->sc_ioh = ioh;
! 128: sc->sc_enabled = 0;
! 129:
! 130: sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE,
! 131: IPL_TTY, mmsintr, sc, sc->sc_dev.dv_xname);
! 132:
! 133: a.accessops = &mms_accessops;
! 134: a.accesscookie = sc;
! 135:
! 136: /*
! 137: * Attach the wsmouse, saving a handle to it.
! 138: * Note that we don't need to check this pointer against NULL
! 139: * here or in psmintr, because if this fails lms_enable() will
! 140: * never be called, so lmsintr() will never be called.
! 141: */
! 142: sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint);
! 143: }
! 144:
! 145: int
! 146: mms_enable(void *v)
! 147: {
! 148: struct mms_softc *sc = v;
! 149:
! 150: if (sc->sc_enabled)
! 151: return EBUSY;
! 152:
! 153: sc->sc_enabled = 1;
! 154:
! 155: /* Enable interrupts. */
! 156: bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07);
! 157: bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09);
! 158:
! 159: return 0;
! 160: }
! 161:
! 162: void
! 163: mms_disable(void *v)
! 164: {
! 165: struct mms_softc *sc = v;
! 166:
! 167: /* Disable interrupts. */
! 168: bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87);
! 169:
! 170: sc->sc_enabled = 0;
! 171: }
! 172:
! 173: int
! 174: mms_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
! 175: {
! 176: #if 0
! 177: struct mms_softc *sc = v;
! 178: #endif
! 179:
! 180: switch (cmd) {
! 181: case WSMOUSEIO_GTYPE:
! 182: *(u_int *)data = WSMOUSE_TYPE_MMS;
! 183: return (0);
! 184: }
! 185: return (-1);
! 186: }
! 187:
! 188: int
! 189: mmsintr(void *arg)
! 190: {
! 191: struct mms_softc *sc = arg;
! 192: bus_space_tag_t iot = sc->sc_iot;
! 193: bus_space_handle_t ioh = sc->sc_ioh;
! 194: u_char status;
! 195: signed char dx, dy;
! 196: u_int buttons;
! 197: int changed;
! 198:
! 199: if (!sc->sc_enabled)
! 200: /* Interrupts are not expected. */
! 201: return 0;
! 202:
! 203: /* Freeze InPort registers (disabling interrupts). */
! 204: bus_space_write_1(iot, ioh, MMS_ADDR, 0x07);
! 205: bus_space_write_1(iot, ioh, MMS_DATA, 0x29);
! 206:
! 207: bus_space_write_1(iot, ioh, MMS_ADDR, 0x00);
! 208: status = bus_space_read_1(iot, ioh, MMS_DATA);
! 209:
! 210: if (status & 0x40) {
! 211: bus_space_write_1(iot, ioh, MMS_ADDR, 1);
! 212: dx = bus_space_read_1(iot, ioh, MMS_DATA);
! 213: /* Bounding at -127 avoids a bug in XFree86. */
! 214: dx = (dx == -128) ? -127 : dx;
! 215:
! 216: bus_space_write_1(iot, ioh, MMS_ADDR, 2);
! 217: dy = bus_space_read_1(iot, ioh, MMS_DATA);
! 218: dy = (dy == -128) ? 127 : -dy;
! 219: } else
! 220: dx = dy = 0;
! 221:
! 222: /* Unfreeze InPort registers (reenabling interrupts). */
! 223: bus_space_write_1(iot, ioh, MMS_ADDR, 0x07);
! 224: bus_space_write_1(iot, ioh, MMS_DATA, 0x09);
! 225:
! 226: buttons = ((status & 0x04) ? 0x1 : 0) |
! 227: ((status & 0x02) ? 0x2 : 0) |
! 228: ((status & 0x01) ? 0x4 : 0);
! 229: changed = status & 0x38;
! 230:
! 231: if (dx || dy || changed)
! 232: wsmouse_input(sc->sc_wsmousedev,
! 233: buttons, dx, dy, 0, 0, WSMOUSE_INPUT_DELTA);
! 234:
! 235: return -1;
! 236: }
! 237:
! 238: struct cfdriver mms_cd = {
! 239: NULL, "mms", DV_DULL
! 240: };
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