1 /* $NetBSD: lms.c,v 1.41 2002/03/17 19:40:41 atatat Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994 Charles M. Hannum. 5 * Copyright (c) 1992, 1993 Erik Forsberg. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED 15 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 16 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 17 * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 21 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 22 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 __KERNEL_RCSID(0, "$NetBSD: lms.c,v 1.41 2002/03/17 19:40:41 atatat Exp $"); 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/ioctl.h> 32 #include <sys/device.h> 33 34 #include <machine/bus.h> 35 #include <machine/intr.h> 36 37 #include <dev/isa/isavar.h> 38 39 #include <dev/wscons/wsconsio.h> 40 #include <dev/wscons/wsmousevar.h> 41 42 #define LMS_DATA 0 /* offset for data port, read-only */ 43 #define LMS_SIGN 1 /* offset for signature port, read-write */ 44 #define LMS_INTR 2 /* offset for interrupt port, read-only */ 45 #define LMS_CNTRL 2 /* offset for control port, write-only */ 46 #define LMS_CONFIG 3 /* for configuration port, read-write */ 47 #define LMS_NPORTS 4 48 49 struct lms_softc { /* driver status information */ 50 struct device sc_dev; 51 void *sc_ih; 52 53 bus_space_tag_t sc_iot; /* bus i/o space identifier */ 54 bus_space_handle_t sc_ioh; /* bus i/o handle */ 55 56 int sc_enabled; /* device is open */ 57 int oldbuttons; /* mouse button status */ 58 59 struct device *sc_wsmousedev; 60 }; 61 62 int lmsprobe __P((struct device *, struct cfdata *, void *)); 63 void lmsattach __P((struct device *, struct device *, void *)); 64 int lmsintr __P((void *)); 65 66 struct cfattach lms_ca = { 67 sizeof(struct lms_softc), lmsprobe, lmsattach 68 }; 69 70 int lms_enable __P((void *)); 71 int lms_ioctl __P((void *, u_long, caddr_t, int, struct proc *)); 72 void lms_disable __P((void *)); 73 74 const struct wsmouse_accessops lms_accessops = { 75 lms_enable, 76 lms_ioctl, 77 lms_disable, 78 }; 79 80 int 81 lmsprobe(parent, match, aux) 82 struct device *parent; 83 struct cfdata *match; 84 void *aux; 85 { 86 struct isa_attach_args *ia = aux; 87 bus_space_tag_t iot = ia->ia_iot; 88 bus_space_handle_t ioh; 89 int rv; 90 91 if (ia->ia_nio < 1) 92 return (0); 93 if (ia->ia_nirq < 1) 94 return (0); 95 96 if (ISA_DIRECT_CONFIG(ia)) 97 return (0); 98 99 /* Disallow wildcarded i/o base. */ 100 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 101 return 0; 102 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 103 return 0; 104 105 /* Map the i/o space. */ 106 if (bus_space_map(iot, ia->ia_io[0].ir_addr, LMS_NPORTS, 0, &ioh)) 107 return 0; 108 109 rv = 0; 110 111 /* Configure and check for port present. */ 112 bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91); 113 delay(10); 114 bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c); 115 delay(10); 116 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c) 117 goto out; 118 bus_space_write_1(iot, ioh, LMS_SIGN, 0x50); 119 delay(10); 120 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50) 121 goto out; 122 123 /* Disable interrupts. */ 124 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10); 125 126 rv = 1; 127 ia->ia_nio = 1; 128 ia->ia_io[0].ir_size = LMS_NPORTS; 129 130 ia->ia_nirq = 1; 131 132 ia->ia_niomem = 0; 133 ia->ia_ndrq = 0; 134 135 out: 136 bus_space_unmap(iot, ioh, LMS_NPORTS); 137 return rv; 138 } 139 140 void 141 lmsattach(parent, self, aux) 142 struct device *parent, *self; 143 void *aux; 144 { 145 struct lms_softc *sc = (void *)self; 146 struct isa_attach_args *ia = aux; 147 bus_space_tag_t iot = ia->ia_iot; 148 bus_space_handle_t ioh; 149 struct wsmousedev_attach_args a; 150 151 printf("\n"); 152 153 if (bus_space_map(iot, ia->ia_io[0].ir_addr, LMS_NPORTS, 0, &ioh)) { 154 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 155 return; 156 } 157 158 /* Other initialization was done by lmsprobe. */ 159 sc->sc_iot = iot; 160 sc->sc_ioh = ioh; 161 sc->sc_enabled = 0; 162 163 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 164 IST_PULSE, IPL_TTY, lmsintr, sc); 165 166 a.accessops = &lms_accessops; 167 a.accesscookie = sc; 168 169 /* 170 * Attach the wsmouse, saving a handle to it. 171 * Note that we don't need to check this pointer against NULL 172 * here or in psmintr, because if this fails lms_enable() will 173 * never be called, so lmsintr() will never be called. 174 */ 175 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 176 } 177 178 int 179 lms_enable(v) 180 void *v; 181 { 182 struct lms_softc *sc = v; 183 184 if (sc->sc_enabled) 185 return EBUSY; 186 187 sc->sc_enabled = 1; 188 sc->oldbuttons = 0; 189 190 /* Enable interrupts. */ 191 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0); 192 193 return 0; 194 } 195 196 void 197 lms_disable(v) 198 void *v; 199 { 200 struct lms_softc *sc = v; 201 202 /* Disable interrupts. */ 203 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10); 204 205 sc->sc_enabled = 0; 206 } 207 208 int 209 lms_ioctl(v, cmd, data, flag, p) 210 void *v; 211 u_long cmd; 212 caddr_t data; 213 int flag; 214 struct proc *p; 215 { 216 #if 0 217 struct lms_softc *sc = v; 218 #endif 219 220 switch (cmd) { 221 case WSMOUSEIO_GTYPE: 222 *(u_int *)data = WSMOUSE_TYPE_LMS; 223 return (0); 224 } 225 return (EPASSTHROUGH); 226 } 227 228 int 229 lmsintr(arg) 230 void *arg; 231 { 232 struct lms_softc *sc = arg; 233 bus_space_tag_t iot = sc->sc_iot; 234 bus_space_handle_t ioh = sc->sc_ioh; 235 u_char hi, lo; 236 signed char dx, dy; 237 u_int buttons; 238 int changed; 239 240 if (!sc->sc_enabled) 241 /* Interrupts are not expected. */ 242 return 0; 243 244 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab); 245 hi = bus_space_read_1(iot, ioh, LMS_DATA); 246 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90); 247 lo = bus_space_read_1(iot, ioh, LMS_DATA); 248 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 249 /* Bounding at -127 avoids a bug in XFree86. */ 250 dx = (dx == -128) ? -127 : dx; 251 252 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0); 253 hi = bus_space_read_1(iot, ioh, LMS_DATA); 254 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0); 255 lo = bus_space_read_1(iot, ioh, LMS_DATA); 256 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 257 dy = (dy == -128) ? 127 : -dy; 258 259 bus_space_write_1(iot, ioh, LMS_CNTRL, 0); 260 261 buttons = ((hi & 0x80) ? 0 : 0x1) | 262 ((hi & 0x40) ? 0 : 0x2) | 263 ((hi & 0x20) ? 0 : 0x4); 264 changed = (buttons ^ sc->oldbuttons); 265 sc->oldbuttons = buttons; 266 267 if (dx || dy || changed) 268 wsmouse_input(sc->sc_wsmousedev, 269 buttons, dx, dy, 0, WSMOUSE_INPUT_DELTA); 270 271 return -1; 272 } 273