1 /* $OpenBSD: lms.c,v 1.21 2016/06/05 20:02:36 bru 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(struct device *parent, void *match, 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 base. */ 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, LMS_NPORTS, 0, &ioh)) 92 return 0; 93 94 rv = 0; 95 96 /* Configure and check for port present. */ 97 bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91); 98 delay(10); 99 bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c); 100 delay(10); 101 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c) 102 goto out; 103 bus_space_write_1(iot, ioh, LMS_SIGN, 0x50); 104 delay(10); 105 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50) 106 goto out; 107 108 /* Disable interrupts. */ 109 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10); 110 111 rv = 1; 112 ia->ia_iosize = LMS_NPORTS; 113 ia->ia_msize = 0; 114 115 out: 116 bus_space_unmap(iot, ioh, LMS_NPORTS); 117 return rv; 118 } 119 120 void 121 lmsattach(struct device *parent, struct device *self, void *aux) 122 { 123 struct lms_softc *sc = (void *)self; 124 struct isa_attach_args *ia = aux; 125 bus_space_tag_t iot = ia->ia_iot; 126 bus_space_handle_t ioh; 127 struct wsmousedev_attach_args a; 128 129 printf("\n"); 130 131 if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) { 132 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 133 return; 134 } 135 136 /* Other initialization was done by lmsprobe. */ 137 sc->sc_iot = iot; 138 sc->sc_ioh = ioh; 139 sc->sc_enabled = 0; 140 141 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE, 142 IPL_TTY, lmsintr, sc, sc->sc_dev.dv_xname); 143 144 a.accessops = &lms_accessops; 145 a.accesscookie = sc; 146 147 /* 148 * Attach the wsmouse, saving a handle to it. 149 * Note that we don't need to check this pointer against NULL 150 * here or in psmintr, because if this fails lms_enable() will 151 * never be called, so lmsintr() will never be called. 152 */ 153 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 154 } 155 156 int 157 lms_enable(void *v) 158 { 159 struct lms_softc *sc = v; 160 161 if (sc->sc_enabled) 162 return EBUSY; 163 164 sc->sc_enabled = 1; 165 sc->oldbuttons = 0; 166 167 /* Enable interrupts. */ 168 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0); 169 170 return 0; 171 } 172 173 void 174 lms_disable(void *v) 175 { 176 struct lms_softc *sc = v; 177 178 /* Disable interrupts. */ 179 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10); 180 181 sc->sc_enabled = 0; 182 } 183 184 int 185 lms_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p) 186 { 187 #if 0 188 struct lms_softc *sc = v; 189 #endif 190 191 switch (cmd) { 192 case WSMOUSEIO_GTYPE: 193 *(u_int *)data = WSMOUSE_TYPE_LMS; 194 return (0); 195 } 196 return (-1); 197 } 198 199 int 200 lmsintr(void *arg) 201 { 202 struct lms_softc *sc = arg; 203 bus_space_tag_t iot = sc->sc_iot; 204 bus_space_handle_t ioh = sc->sc_ioh; 205 u_char hi, lo; 206 signed char dx, dy; 207 u_int buttons; 208 int changed; 209 210 if (!sc->sc_enabled) 211 /* Interrupts are not expected. */ 212 return 0; 213 214 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab); 215 hi = bus_space_read_1(iot, ioh, LMS_DATA); 216 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90); 217 lo = bus_space_read_1(iot, ioh, LMS_DATA); 218 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 219 /* Bounding at -127 avoids a bug in XFree86. */ 220 dx = (dx == -128) ? -127 : dx; 221 222 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0); 223 hi = bus_space_read_1(iot, ioh, LMS_DATA); 224 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0); 225 lo = bus_space_read_1(iot, ioh, LMS_DATA); 226 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 227 dy = (dy == -128) ? 127 : -dy; 228 229 bus_space_write_1(iot, ioh, LMS_CNTRL, 0); 230 231 buttons = ((hi & 0x80) ? 0 : 0x1) | 232 ((hi & 0x40) ? 0 : 0x2) | 233 ((hi & 0x20) ? 0 : 0x4); 234 changed = (buttons ^ sc->oldbuttons); 235 sc->oldbuttons = buttons; 236 237 if (dx || dy || changed) 238 WSMOUSE_INPUT(sc->sc_wsmousedev, buttons, dx, dy, 0, 0); 239 240 return -1; 241 } 242 243 struct cfdriver lms_cd = { 244 NULL, "lms", DV_DULL 245 }; 246