1 /* $OpenBSD: lms.c,v 1.18 2002/03/14 01:26:33 millert Exp $ */ 2 /* $NetBSD: lms.c,v 1.38 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/bus.h> 33 #include <machine/intr.h> 34 35 #include <dev/isa/isavar.h> 36 37 #include <dev/wscons/wsconsio.h> 38 #include <dev/wscons/wsmousevar.h> 39 40 #define LMS_DATA 0 /* offset for data port, read-only */ 41 #define LMS_SIGN 1 /* offset for signature port, read-write */ 42 #define LMS_INTR 2 /* offset for interrupt port, read-only */ 43 #define LMS_CNTRL 2 /* offset for control port, write-only */ 44 #define LMS_CONFIG 3 /* for configuration port, read-write */ 45 #define LMS_NPORTS 4 46 47 struct lms_softc { /* driver status information */ 48 struct device sc_dev; 49 void *sc_ih; 50 51 bus_space_tag_t sc_iot; /* bus i/o space identifier */ 52 bus_space_handle_t sc_ioh; /* bus i/o handle */ 53 54 int sc_enabled; /* device is open */ 55 int oldbuttons; /* mouse button status */ 56 57 struct device *sc_wsmousedev; 58 }; 59 60 int lmsprobe(struct device *, void *, void *); 61 void lmsattach(struct device *, struct device *, void *); 62 int lmsintr(void *); 63 64 struct cfattach lms_ca = { 65 sizeof(struct lms_softc), lmsprobe, lmsattach 66 }; 67 68 int lms_enable(void *); 69 int lms_ioctl(void *, u_long, caddr_t, int, struct proc *); 70 void lms_disable(void *); 71 72 const struct wsmouse_accessops lms_accessops = { 73 lms_enable, 74 lms_ioctl, 75 lms_disable, 76 }; 77 78 int 79 lmsprobe(parent, match, aux) 80 struct device *parent; 81 void *match; 82 void *aux; 83 { 84 struct isa_attach_args *ia = aux; 85 bus_space_tag_t iot = ia->ia_iot; 86 bus_space_handle_t ioh; 87 int rv; 88 89 /* Disallow wildcarded i/o base. */ 90 if (ia->ia_iobase == IOBASEUNK) 91 return 0; 92 93 /* Map the i/o space. */ 94 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) 95 return 0; 96 97 rv = 0; 98 99 /* Configure and check for port present. */ 100 bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91); 101 delay(10); 102 bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c); 103 delay(10); 104 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c) 105 goto out; 106 bus_space_write_1(iot, ioh, LMS_SIGN, 0x50); 107 delay(10); 108 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50) 109 goto out; 110 111 /* Disable interrupts. */ 112 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10); 113 114 rv = 1; 115 ia->ia_iosize = LMS_NPORTS; 116 ia->ia_msize = 0; 117 118 out: 119 bus_space_unmap(iot, ioh, LMS_NPORTS); 120 return rv; 121 } 122 123 void 124 lmsattach(parent, self, aux) 125 struct device *parent, *self; 126 void *aux; 127 { 128 struct lms_softc *sc = (void *)self; 129 struct isa_attach_args *ia = aux; 130 bus_space_tag_t iot = ia->ia_iot; 131 bus_space_handle_t ioh; 132 struct wsmousedev_attach_args a; 133 134 printf("\n"); 135 136 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) { 137 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 138 return; 139 } 140 141 /* Other initialization was done by lmsprobe. */ 142 sc->sc_iot = iot; 143 sc->sc_ioh = ioh; 144 sc->sc_enabled = 0; 145 146 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 147 IPL_TTY, lmsintr, sc, sc->sc_dev.dv_xname); 148 149 a.accessops = &lms_accessops; 150 a.accesscookie = sc; 151 152 /* 153 * Attach the wsmouse, saving a handle to it. 154 * Note that we don't need to check this pointer against NULL 155 * here or in psmintr, because if this fails lms_enable() will 156 * never be called, so lmsintr() will never be called. 157 */ 158 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 159 } 160 161 int 162 lms_enable(v) 163 void *v; 164 { 165 struct lms_softc *sc = v; 166 167 if (sc->sc_enabled) 168 return EBUSY; 169 170 sc->sc_enabled = 1; 171 sc->oldbuttons = 0; 172 173 /* Enable interrupts. */ 174 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0); 175 176 return 0; 177 } 178 179 void 180 lms_disable(v) 181 void *v; 182 { 183 struct lms_softc *sc = v; 184 185 /* Disable interrupts. */ 186 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10); 187 188 sc->sc_enabled = 0; 189 } 190 191 int 192 lms_ioctl(v, cmd, data, flag, p) 193 void *v; 194 u_long cmd; 195 caddr_t data; 196 int flag; 197 struct proc *p; 198 { 199 #if 0 200 struct lms_softc *sc = v; 201 #endif 202 203 switch (cmd) { 204 case WSMOUSEIO_GTYPE: 205 *(u_int *)data = WSMOUSE_TYPE_LMS; 206 return (0); 207 } 208 return (-1); 209 } 210 211 int 212 lmsintr(arg) 213 void *arg; 214 { 215 struct lms_softc *sc = arg; 216 bus_space_tag_t iot = sc->sc_iot; 217 bus_space_handle_t ioh = sc->sc_ioh; 218 u_char hi, lo; 219 signed char dx, dy; 220 u_int buttons; 221 int changed; 222 223 if (!sc->sc_enabled) 224 /* Interrupts are not expected. */ 225 return 0; 226 227 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab); 228 hi = bus_space_read_1(iot, ioh, LMS_DATA); 229 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90); 230 lo = bus_space_read_1(iot, ioh, LMS_DATA); 231 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 232 /* Bounding at -127 avoids a bug in XFree86. */ 233 dx = (dx == -128) ? -127 : dx; 234 235 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0); 236 hi = bus_space_read_1(iot, ioh, LMS_DATA); 237 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0); 238 lo = bus_space_read_1(iot, ioh, LMS_DATA); 239 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 240 dy = (dy == -128) ? 127 : -dy; 241 242 bus_space_write_1(iot, ioh, LMS_CNTRL, 0); 243 244 buttons = ((hi & 0x80) ? 0 : 0x1) | 245 ((hi & 0x40) ? 0 : 0x2) | 246 ((hi & 0x20) ? 0 : 0x4); 247 changed = (buttons ^ sc->oldbuttons); 248 sc->oldbuttons = buttons; 249 250 if (dx || dy || changed) 251 wsmouse_input(sc->sc_wsmousedev, 252 buttons, dx, dy, 0, WSMOUSE_INPUT_DELTA); 253 254 return -1; 255 } 256 257 struct cfdriver lms_cd = { 258 NULL, "lms", DV_DULL 259 }; 260