mms.c revision 1.39
1 /* $NetBSD: mms.c,v 1.39 2002/09/27 20:32:59 thorpej 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: mms.c,v 1.39 2002/09/27 20:32:59 thorpej 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/intr.h> 35 #include <machine/bus.h> 36 37 #include <dev/isa/isavar.h> 38 39 #include <dev/wscons/wsconsio.h> 40 #include <dev/wscons/wsmousevar.h> 41 42 #define MMS_ADDR 0 /* offset for register select */ 43 #define MMS_DATA 1 /* offset for InPort data */ 44 #define MMS_IDENT 2 /* offset for identification register */ 45 #define MMS_NPORTS 4 46 47 struct mms_softc { /* driver status information */ 48 struct device sc_dev; 49 void *sc_ih; 50 51 bus_space_tag_t sc_iot; 52 bus_space_handle_t sc_ioh; 53 54 int sc_enabled; /* device is open */ 55 56 struct device *sc_wsmousedev; 57 }; 58 59 int mmsprobe __P((struct device *, struct cfdata *, void *)); 60 void mmsattach __P((struct device *, struct device *, void *)); 61 int mmsintr __P((void *)); 62 63 const struct cfattach mms_ca = { 64 sizeof(struct mms_softc), mmsprobe, mmsattach 65 }; 66 67 int mms_enable __P((void *)); 68 int mms_ioctl __P((void *, u_long, caddr_t, int, struct proc *)); 69 void mms_disable __P((void *)); 70 71 const struct wsmouse_accessops mms_accessops = { 72 mms_enable, 73 mms_ioctl, 74 mms_disable, 75 }; 76 77 int 78 mmsprobe(parent, match, aux) 79 struct device *parent; 80 struct cfdata *match; 81 void *aux; 82 { 83 struct isa_attach_args *ia = aux; 84 bus_space_tag_t iot = ia->ia_iot; 85 bus_space_handle_t ioh; 86 int rv; 87 88 if (ia->ia_nio < 1) 89 return (0); 90 if (ia->ia_nirq < 1) 91 return (0); 92 93 if (ISA_DIRECT_CONFIG(ia)) 94 return (0); 95 96 /* Disallow wildcarded i/o address. */ 97 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 98 return 0; 99 100 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 101 return 0; 102 103 /* Map the i/o space. */ 104 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) 105 return 0; 106 107 rv = 0; 108 109 /* Read identification register to see if present */ 110 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 111 goto out; 112 113 /* Seems it was there; reset. */ 114 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 115 116 rv = 1; 117 118 ia->ia_nio = 1; 119 ia->ia_io[0].ir_size = MMS_NPORTS; 120 121 ia->ia_nirq = 1; 122 123 ia->ia_niomem = 0; 124 ia->ia_ndrq = 0; 125 126 out: 127 bus_space_unmap(iot, ioh, MMS_NPORTS); 128 return rv; 129 } 130 131 void 132 mmsattach(parent, self, aux) 133 struct device *parent, *self; 134 void *aux; 135 { 136 struct mms_softc *sc = (void *)self; 137 struct isa_attach_args *ia = aux; 138 bus_space_tag_t iot = ia->ia_iot; 139 bus_space_handle_t ioh; 140 struct wsmousedev_attach_args a; 141 142 printf("\n"); 143 144 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) { 145 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 146 return; 147 } 148 149 /* Other initialization was done by mmsprobe. */ 150 sc->sc_iot = iot; 151 sc->sc_ioh = ioh; 152 sc->sc_enabled = 0; 153 154 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 155 IST_PULSE, IPL_TTY, mmsintr, sc); 156 157 a.accessops = &mms_accessops; 158 a.accesscookie = sc; 159 160 /* 161 * Attach the wsmouse, saving a handle to it. 162 * Note that we don't need to check this pointer against NULL 163 * here or in psmintr, because if this fails lms_enable() will 164 * never be called, so lmsintr() will never be called. 165 */ 166 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 167 } 168 169 int 170 mms_enable(v) 171 void *v; 172 { 173 struct mms_softc *sc = v; 174 175 if (sc->sc_enabled) 176 return EBUSY; 177 178 sc->sc_enabled = 1; 179 180 /* Enable interrupts. */ 181 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07); 182 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09); 183 184 return 0; 185 } 186 187 void 188 mms_disable(v) 189 void *v; 190 { 191 struct mms_softc *sc = v; 192 193 /* Disable interrupts. */ 194 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87); 195 196 sc->sc_enabled = 0; 197 } 198 199 int 200 mms_ioctl(v, cmd, data, flag, p) 201 void *v; 202 u_long cmd; 203 caddr_t data; 204 int flag; 205 struct proc *p; 206 { 207 #if 0 208 struct mms_softc *sc = v; 209 #endif 210 211 switch (cmd) { 212 case WSMOUSEIO_GTYPE: 213 *(u_int *)data = WSMOUSE_TYPE_MMS; 214 return (0); 215 } 216 return (EPASSTHROUGH); 217 } 218 219 int 220 mmsintr(arg) 221 void *arg; 222 { 223 struct mms_softc *sc = arg; 224 bus_space_tag_t iot = sc->sc_iot; 225 bus_space_handle_t ioh = sc->sc_ioh; 226 u_char status; 227 signed char dx, dy; 228 u_int buttons; 229 int changed; 230 231 if (!sc->sc_enabled) 232 /* Interrupts are not expected. */ 233 return 0; 234 235 /* Freeze InPort registers (disabling interrupts). */ 236 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 237 bus_space_write_1(iot, ioh, MMS_DATA, 0x29); 238 239 bus_space_write_1(iot, ioh, MMS_ADDR, 0x00); 240 status = bus_space_read_1(iot, ioh, MMS_DATA); 241 242 if (status & 0x40) { 243 bus_space_write_1(iot, ioh, MMS_ADDR, 1); 244 dx = bus_space_read_1(iot, ioh, MMS_DATA); 245 /* Bounding at -127 avoids a bug in XFree86. */ 246 dx = (dx == -128) ? -127 : dx; 247 248 bus_space_write_1(iot, ioh, MMS_ADDR, 2); 249 dy = bus_space_read_1(iot, ioh, MMS_DATA); 250 dy = (dy == -128) ? 127 : -dy; 251 } else 252 dx = dy = 0; 253 254 /* Unfreeze InPort registers (reenabling interrupts). */ 255 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 256 bus_space_write_1(iot, ioh, MMS_DATA, 0x09); 257 258 buttons = ((status & 0x04) ? 0x1 : 0) | 259 ((status & 0x02) ? 0x2 : 0) | 260 ((status & 0x01) ? 0x4 : 0); 261 changed = status & 0x38; 262 263 if (dx || dy || changed) 264 wsmouse_input(sc->sc_wsmousedev, 265 buttons, dx, dy, 0, WSMOUSE_INPUT_DELTA); 266 267 return -1; 268 } 269
Indexes created Thu Nov 06 07:09:58 GMT 2025