1 /* $OpenBSD: mms.c,v 1.15 2001/08/07 19:24:27 jason 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 __P((struct device *, void *, void *)); 58 void mmsattach __P((struct device *, struct device *, void *)); 59 int mmsintr __P((void *)); 60 61 struct cfattach mms_ca = { 62 sizeof(struct mms_softc), mmsprobe, mmsattach 63 }; 64 65 int mms_enable __P((void *)); 66 int mms_ioctl __P((void *, u_long, caddr_t, int, struct proc *)); 67 void mms_disable __P((void *)); 68 69 const struct wsmouse_accessops mms_accessops = { 70 mms_enable, 71 mms_ioctl, 72 mms_disable, 73 }; 74 75 int 76 mmsprobe(parent, match, aux) 77 struct device *parent; 78 void *match; 79 void *aux; 80 { 81 struct isa_attach_args *ia = aux; 82 bus_space_tag_t iot = ia->ia_iot; 83 bus_space_handle_t ioh; 84 int rv; 85 86 /* Disallow wildcarded i/o address. */ 87 if (ia->ia_iobase == IOBASEUNK) 88 return 0; 89 90 /* Map the i/o space. */ 91 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) 92 return 0; 93 94 rv = 0; 95 96 /* Read identification register to see if present */ 97 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 98 goto out; 99 100 /* Seems it was there; reset. */ 101 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 102 103 rv = 1; 104 ia->ia_iosize = MMS_NPORTS; 105 ia->ia_msize = 0; 106 107 out: 108 bus_space_unmap(iot, ioh, MMS_NPORTS); 109 return rv; 110 } 111 112 void 113 mmsattach(parent, self, aux) 114 struct device *parent, *self; 115 void *aux; 116 { 117 struct mms_softc *sc = (void *)self; 118 struct isa_attach_args *ia = aux; 119 bus_space_tag_t iot = ia->ia_iot; 120 bus_space_handle_t ioh; 121 struct wsmousedev_attach_args a; 122 123 printf("\n"); 124 125 if (bus_space_map(iot, ia->ia_iobase, MMS_NPORTS, 0, &ioh)) { 126 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 127 return; 128 } 129 130 /* Other initialization was done by mmsprobe. */ 131 sc->sc_iot = iot; 132 sc->sc_ioh = ioh; 133 sc->sc_enabled = 0; 134 135 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 136 IPL_TTY, mmsintr, sc, sc->sc_dev.dv_xname); 137 138 a.accessops = &mms_accessops; 139 a.accesscookie = sc; 140 141 /* 142 * Attach the wsmouse, saving a handle to it. 143 * Note that we don't need to check this pointer against NULL 144 * here or in psmintr, because if this fails lms_enable() will 145 * never be called, so lmsintr() will never be called. 146 */ 147 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 148 } 149 150 int 151 mms_enable(v) 152 void *v; 153 { 154 struct mms_softc *sc = v; 155 156 if (sc->sc_enabled) 157 return EBUSY; 158 159 sc->sc_enabled = 1; 160 161 /* Enable interrupts. */ 162 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07); 163 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09); 164 165 return 0; 166 } 167 168 void 169 mms_disable(v) 170 void *v; 171 { 172 struct mms_softc *sc = v; 173 174 /* Disable interrupts. */ 175 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87); 176 177 sc->sc_enabled = 0; 178 } 179 180 int 181 mms_ioctl(v, cmd, data, flag, p) 182 void *v; 183 u_long cmd; 184 caddr_t data; 185 int flag; 186 struct proc *p; 187 { 188 #if 0 189 struct mms_softc *sc = v; 190 #endif 191 192 switch (cmd) { 193 case WSMOUSEIO_GTYPE: 194 *(u_int *)data = WSMOUSE_TYPE_MMS; 195 return (0); 196 } 197 return (-1); 198 } 199 200 int 201 mmsintr(arg) 202 void *arg; 203 { 204 struct mms_softc *sc = arg; 205 bus_space_tag_t iot = sc->sc_iot; 206 bus_space_handle_t ioh = sc->sc_ioh; 207 u_char status; 208 signed char dx, dy; 209 u_int buttons; 210 int changed; 211 212 if (!sc->sc_enabled) 213 /* Interrupts are not expected. */ 214 return 0; 215 216 /* Freeze InPort registers (disabling interrupts). */ 217 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 218 bus_space_write_1(iot, ioh, MMS_DATA, 0x29); 219 220 bus_space_write_1(iot, ioh, MMS_ADDR, 0x00); 221 status = bus_space_read_1(iot, ioh, MMS_DATA); 222 223 if (status & 0x40) { 224 bus_space_write_1(iot, ioh, MMS_ADDR, 1); 225 dx = bus_space_read_1(iot, ioh, MMS_DATA); 226 /* Bounding at -127 avoids a bug in XFree86. */ 227 dx = (dx == -128) ? -127 : dx; 228 229 bus_space_write_1(iot, ioh, MMS_ADDR, 2); 230 dy = bus_space_read_1(iot, ioh, MMS_DATA); 231 dy = (dy == -128) ? 127 : -dy; 232 } else 233 dx = dy = 0; 234 235 /* Unfreeze InPort registers (reenabling interrupts). */ 236 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 237 bus_space_write_1(iot, ioh, MMS_DATA, 0x09); 238 239 buttons = ((status & 0x04) ? 0x1 : 0) | 240 ((status & 0x02) ? 0x2 : 0) | 241 ((status & 0x01) ? 0x4 : 0); 242 changed = status & 0x38; 243 244 if (dx || dy || changed) 245 wsmouse_input(sc->sc_wsmousedev, 246 buttons, dx, dy, 0, WSMOUSE_INPUT_DELTA); 247 248 return -1; 249 } 250 251 struct cfdriver mms_cd = { 252 NULL, "mms", DV_DULL 253 }; 254