mms.c revision 1.43
1 /* $NetBSD: mms.c,v 1.43 2005/02/03 21:08:58 perry 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 1.43 2005/02/03 21:08:58 perry 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(struct device *, struct cfdata *, void *); 60 void mmsattach(struct device *, struct device *, void *); 61 int mmsintr(void *); 62 63 CFATTACH_DECL(mms, sizeof(struct mms_softc), 64 mmsprobe, mmsattach, NULL, NULL); 65 66 int mms_enable(void *); 67 int mms_ioctl(void *, u_long, caddr_t, int, struct proc *); 68 void mms_disable(void *); 69 70 const struct wsmouse_accessops mms_accessops = { 71 mms_enable, 72 mms_ioctl, 73 mms_disable, 74 }; 75 76 int 77 mmsprobe(struct device *parent, struct cfdata *match, void *aux) 78 { 79 struct isa_attach_args *ia = aux; 80 bus_space_tag_t iot = ia->ia_iot; 81 bus_space_handle_t ioh; 82 int rv; 83 84 if (ia->ia_nio < 1) 85 return (0); 86 if (ia->ia_nirq < 1) 87 return (0); 88 89 if (ISA_DIRECT_CONFIG(ia)) 90 return (0); 91 92 /* Disallow wildcarded i/o address. */ 93 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 94 return 0; 95 96 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 97 return 0; 98 99 /* Map the i/o space. */ 100 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) 101 return 0; 102 103 rv = 0; 104 105 /* Read identification register to see if present */ 106 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 107 goto out; 108 109 /* Seems it was there; reset. */ 110 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 111 112 rv = 1; 113 114 ia->ia_nio = 1; 115 ia->ia_io[0].ir_size = MMS_NPORTS; 116 117 ia->ia_nirq = 1; 118 119 ia->ia_niomem = 0; 120 ia->ia_ndrq = 0; 121 122 out: 123 bus_space_unmap(iot, ioh, MMS_NPORTS); 124 return rv; 125 } 126 127 void 128 mmsattach(struct device *parent, struct device *self, void *aux) 129 { 130 struct mms_softc *sc = (void *)self; 131 struct isa_attach_args *ia = aux; 132 bus_space_tag_t iot = ia->ia_iot; 133 bus_space_handle_t ioh; 134 struct wsmousedev_attach_args a; 135 136 printf("\n"); 137 138 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) { 139 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 140 return; 141 } 142 143 /* Other initialization was done by mmsprobe. */ 144 sc->sc_iot = iot; 145 sc->sc_ioh = ioh; 146 sc->sc_enabled = 0; 147 148 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 149 IST_PULSE, IPL_TTY, mmsintr, sc); 150 151 a.accessops = &mms_accessops; 152 a.accesscookie = sc; 153 154 /* 155 * Attach the wsmouse, saving a handle to it. 156 * Note that we don't need to check this pointer against NULL 157 * here or in psmintr, because if this fails lms_enable() will 158 * never be called, so lmsintr() will never be called. 159 */ 160 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 161 } 162 163 int 164 mms_enable(void *v) 165 { 166 struct mms_softc *sc = v; 167 168 if (sc->sc_enabled) 169 return EBUSY; 170 171 sc->sc_enabled = 1; 172 173 /* Enable interrupts. */ 174 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07); 175 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09); 176 177 return 0; 178 } 179 180 void 181 mms_disable(void *v) 182 { 183 struct mms_softc *sc = v; 184 185 /* Disable interrupts. */ 186 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87); 187 188 sc->sc_enabled = 0; 189 } 190 191 int 192 mms_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p) 193 { 194 #if 0 195 struct mms_softc *sc = v; 196 #endif 197 198 switch (cmd) { 199 case WSMOUSEIO_GTYPE: 200 *(u_int *)data = WSMOUSE_TYPE_MMS; 201 return (0); 202 } 203 return (EPASSTHROUGH); 204 } 205 206 int 207 mmsintr(void *arg) 208 { 209 struct mms_softc *sc = arg; 210 bus_space_tag_t iot = sc->sc_iot; 211 bus_space_handle_t ioh = sc->sc_ioh; 212 u_char status; 213 signed char dx, dy; 214 u_int buttons; 215 int changed; 216 217 if (!sc->sc_enabled) 218 /* Interrupts are not expected. */ 219 return 0; 220 221 /* Freeze InPort registers (disabling interrupts). */ 222 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 223 bus_space_write_1(iot, ioh, MMS_DATA, 0x29); 224 225 bus_space_write_1(iot, ioh, MMS_ADDR, 0x00); 226 status = bus_space_read_1(iot, ioh, MMS_DATA); 227 228 if (status & 0x40) { 229 bus_space_write_1(iot, ioh, MMS_ADDR, 1); 230 dx = bus_space_read_1(iot, ioh, MMS_DATA); 231 /* Bounding at -127 avoids a bug in XFree86. */ 232 dx = (dx == -128) ? -127 : dx; 233 234 bus_space_write_1(iot, ioh, MMS_ADDR, 2); 235 dy = bus_space_read_1(iot, ioh, MMS_DATA); 236 dy = (dy == -128) ? 127 : -dy; 237 } else 238 dx = dy = 0; 239 240 /* Unfreeze InPort registers (reenabling interrupts). */ 241 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 242 bus_space_write_1(iot, ioh, MMS_DATA, 0x09); 243 244 buttons = ((status & 0x04) ? 0x1 : 0) | 245 ((status & 0x02) ? 0x2 : 0) | 246 ((status & 0x01) ? 0x4 : 0); 247 changed = status & 0x38; 248 249 if (dx || dy || changed) 250 wsmouse_input(sc->sc_wsmousedev, 251 buttons, dx, dy, 0, WSMOUSE_INPUT_DELTA); 252 253 return -1; 254 } 255
Indexes created Thu Nov 06 07:09:58 GMT 2025