mms.c revision 1.50.4.2
1 /* $NetBSD: mms.c,v 1.50.4.2 2009/05/16 10:41:14 yamt 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 1.50.4.2 2009/05/16 10:41:14 yamt 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 void *sc_ih; 49 50 bus_space_tag_t sc_iot; 51 bus_space_handle_t sc_ioh; 52 53 int sc_enabled; /* device is open */ 54 55 device_t sc_wsmousedev; 56 }; 57 58 static int mmsprobe(device_t, cfdata_t, void *); 59 static void mmsattach(device_t, device_t, void *); 60 static int mmsintr(void *); 61 62 CFATTACH_DECL_NEW(mms, sizeof(struct mms_softc), 63 mmsprobe, mmsattach, NULL, NULL); 64 65 static int mms_enable(void *); 66 static int mms_ioctl(void *, u_long, void *, int, struct lwp *); 67 static void mms_disable(void *); 68 69 static const struct wsmouse_accessops mms_accessops = { 70 mms_enable, 71 mms_ioctl, 72 mms_disable, 73 }; 74 75 static int 76 mmsprobe(device_t parent, cfdata_t match, void *aux) 77 { 78 struct isa_attach_args *ia = aux; 79 bus_space_tag_t iot = ia->ia_iot; 80 bus_space_handle_t ioh; 81 int rv; 82 83 if (ia->ia_nio < 1) 84 return (0); 85 if (ia->ia_nirq < 1) 86 return (0); 87 88 if (ISA_DIRECT_CONFIG(ia)) 89 return (0); 90 91 /* Disallow wildcarded i/o address. */ 92 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 93 return 0; 94 95 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 96 return 0; 97 98 /* Map the i/o space. */ 99 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) 100 return 0; 101 102 rv = 0; 103 104 /* Read identification register to see if present */ 105 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 106 goto out; 107 108 /* Seems it was there; reset. */ 109 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 110 111 rv = 1; 112 113 ia->ia_nio = 1; 114 ia->ia_io[0].ir_size = MMS_NPORTS; 115 116 ia->ia_nirq = 1; 117 118 ia->ia_niomem = 0; 119 ia->ia_ndrq = 0; 120 121 out: 122 bus_space_unmap(iot, ioh, MMS_NPORTS); 123 return rv; 124 } 125 126 static void 127 mmsattach(device_t parent, device_t self, void *aux) 128 { 129 struct mms_softc *sc = device_private(self); 130 struct isa_attach_args *ia = aux; 131 bus_space_tag_t iot = ia->ia_iot; 132 bus_space_handle_t ioh; 133 struct wsmousedev_attach_args a; 134 135 aprint_naive(": Mouse\n"); 136 aprint_normal(": Microsoft Mouse\n"); 137 138 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) { 139 aprint_error_dev(self, "can't map i/o space\n"); 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 static 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 static 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 static int 192 mms_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l) 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 static 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, 252 dx, dy, 0, 0, 253 WSMOUSE_INPUT_DELTA); 254 255 return -1; 256 } 257
Indexes created Thu Nov 06 07:09:58 GMT 2025