mms.c revision 1.40
1 /* $NetBSD: mms.c,v 1.40 2002/10/01 12:57:12 fvdl 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 1.40 2002/10/01 12:57:12 fvdl 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 CFATTACH_DECL(mms, sizeof(struct mms_softc), mmsprobe, mmsattach, NULL, NULL) 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 struct cfdata *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 if (ia->ia_nio < 1) 87 return (0); 88 if (ia->ia_nirq < 1) 89 return (0); 90 91 if (ISA_DIRECT_CONFIG(ia)) 92 return (0); 93 94 /* Disallow wildcarded i/o address. */ 95 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 96 return 0; 97 98 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 99 return 0; 100 101 /* Map the i/o space. */ 102 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) 103 return 0; 104 105 rv = 0; 106 107 /* Read identification register to see if present */ 108 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 109 goto out; 110 111 /* Seems it was there; reset. */ 112 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 113 114 rv = 1; 115 116 ia->ia_nio = 1; 117 ia->ia_io[0].ir_size = MMS_NPORTS; 118 119 ia->ia_nirq = 1; 120 121 ia->ia_niomem = 0; 122 ia->ia_ndrq = 0; 123 124 out: 125 bus_space_unmap(iot, ioh, MMS_NPORTS); 126 return rv; 127 } 128 129 void 130 mmsattach(parent, self, aux) 131 struct device *parent, *self; 132 void *aux; 133 { 134 struct mms_softc *sc = (void *)self; 135 struct isa_attach_args *ia = aux; 136 bus_space_tag_t iot = ia->ia_iot; 137 bus_space_handle_t ioh; 138 struct wsmousedev_attach_args a; 139 140 printf("\n"); 141 142 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) { 143 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 144 return; 145 } 146 147 /* Other initialization was done by mmsprobe. */ 148 sc->sc_iot = iot; 149 sc->sc_ioh = ioh; 150 sc->sc_enabled = 0; 151 152 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 153 IST_PULSE, IPL_TTY, mmsintr, sc); 154 155 a.accessops = &mms_accessops; 156 a.accesscookie = sc; 157 158 /* 159 * Attach the wsmouse, saving a handle to it. 160 * Note that we don't need to check this pointer against NULL 161 * here or in psmintr, because if this fails lms_enable() will 162 * never be called, so lmsintr() will never be called. 163 */ 164 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 165 } 166 167 int 168 mms_enable(v) 169 void *v; 170 { 171 struct mms_softc *sc = v; 172 173 if (sc->sc_enabled) 174 return EBUSY; 175 176 sc->sc_enabled = 1; 177 178 /* Enable interrupts. */ 179 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07); 180 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09); 181 182 return 0; 183 } 184 185 void 186 mms_disable(v) 187 void *v; 188 { 189 struct mms_softc *sc = v; 190 191 /* Disable interrupts. */ 192 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87); 193 194 sc->sc_enabled = 0; 195 } 196 197 int 198 mms_ioctl(v, cmd, data, flag, p) 199 void *v; 200 u_long cmd; 201 caddr_t data; 202 int flag; 203 struct proc *p; 204 { 205 #if 0 206 struct mms_softc *sc = v; 207 #endif 208 209 switch (cmd) { 210 case WSMOUSEIO_GTYPE: 211 *(u_int *)data = WSMOUSE_TYPE_MMS; 212 return (0); 213 } 214 return (EPASSTHROUGH); 215 } 216 217 int 218 mmsintr(arg) 219 void *arg; 220 { 221 struct mms_softc *sc = arg; 222 bus_space_tag_t iot = sc->sc_iot; 223 bus_space_handle_t ioh = sc->sc_ioh; 224 u_char status; 225 signed char dx, dy; 226 u_int buttons; 227 int changed; 228 229 if (!sc->sc_enabled) 230 /* Interrupts are not expected. */ 231 return 0; 232 233 /* Freeze InPort registers (disabling interrupts). */ 234 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 235 bus_space_write_1(iot, ioh, MMS_DATA, 0x29); 236 237 bus_space_write_1(iot, ioh, MMS_ADDR, 0x00); 238 status = bus_space_read_1(iot, ioh, MMS_DATA); 239 240 if (status & 0x40) { 241 bus_space_write_1(iot, ioh, MMS_ADDR, 1); 242 dx = bus_space_read_1(iot, ioh, MMS_DATA); 243 /* Bounding at -127 avoids a bug in XFree86. */ 244 dx = (dx == -128) ? -127 : dx; 245 246 bus_space_write_1(iot, ioh, MMS_ADDR, 2); 247 dy = bus_space_read_1(iot, ioh, MMS_DATA); 248 dy = (dy == -128) ? 127 : -dy; 249 } else 250 dx = dy = 0; 251 252 /* Unfreeze InPort registers (reenabling interrupts). */ 253 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 254 bus_space_write_1(iot, ioh, MMS_DATA, 0x09); 255 256 buttons = ((status & 0x04) ? 0x1 : 0) | 257 ((status & 0x02) ? 0x2 : 0) | 258 ((status & 0x01) ? 0x4 : 0); 259 changed = status & 0x38; 260 261 if (dx || dy || changed) 262 wsmouse_input(sc->sc_wsmousedev, 263 buttons, dx, dy, 0, WSMOUSE_INPUT_DELTA); 264 265 return -1; 266 } 267
Indexes created Thu Nov 06 07:09:58 GMT 2025