1 /* $NetBSD: mms.c,v 1.41 2002/10/02 05:47:13 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 1.41 2002/10/02 05:47:13 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 CFATTACH_DECL(mms, sizeof(struct mms_softc), 64 mmsprobe, mmsattach, NULL, NULL); 65 66 int mms_enable __P((void *)); 67 int mms_ioctl __P((void *, u_long, caddr_t, int, struct proc *)); 68 void mms_disable __P((void *)); 69 70 const struct wsmouse_accessops mms_accessops = { 71 mms_enable, 72 mms_ioctl, 73 mms_disable, 74 }; 75 76 int 77 mmsprobe(parent, match, aux) 78 struct device *parent; 79 struct cfdata *match; 80 void *aux; 81 { 82 struct isa_attach_args *ia = aux; 83 bus_space_tag_t iot = ia->ia_iot; 84 bus_space_handle_t ioh; 85 int rv; 86 87 if (ia->ia_nio < 1) 88 return (0); 89 if (ia->ia_nirq < 1) 90 return (0); 91 92 if (ISA_DIRECT_CONFIG(ia)) 93 return (0); 94 95 /* Disallow wildcarded i/o address. */ 96 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 97 return 0; 98 99 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 100 return 0; 101 102 /* Map the i/o space. */ 103 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) 104 return 0; 105 106 rv = 0; 107 108 /* Read identification register to see if present */ 109 if (bus_space_read_1(iot, ioh, MMS_IDENT) != 0xde) 110 goto out; 111 112 /* Seems it was there; reset. */ 113 bus_space_write_1(iot, ioh, MMS_ADDR, 0x87); 114 115 rv = 1; 116 117 ia->ia_nio = 1; 118 ia->ia_io[0].ir_size = MMS_NPORTS; 119 120 ia->ia_nirq = 1; 121 122 ia->ia_niomem = 0; 123 ia->ia_ndrq = 0; 124 125 out: 126 bus_space_unmap(iot, ioh, MMS_NPORTS); 127 return rv; 128 } 129 130 void 131 mmsattach(parent, self, aux) 132 struct device *parent, *self; 133 void *aux; 134 { 135 struct mms_softc *sc = (void *)self; 136 struct isa_attach_args *ia = aux; 137 bus_space_tag_t iot = ia->ia_iot; 138 bus_space_handle_t ioh; 139 struct wsmousedev_attach_args a; 140 141 printf("\n"); 142 143 if (bus_space_map(iot, ia->ia_io[0].ir_addr, MMS_NPORTS, 0, &ioh)) { 144 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 145 return; 146 } 147 148 /* Other initialization was done by mmsprobe. */ 149 sc->sc_iot = iot; 150 sc->sc_ioh = ioh; 151 sc->sc_enabled = 0; 152 153 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 154 IST_PULSE, IPL_TTY, mmsintr, sc); 155 156 a.accessops = &mms_accessops; 157 a.accesscookie = sc; 158 159 /* 160 * Attach the wsmouse, saving a handle to it. 161 * Note that we don't need to check this pointer against NULL 162 * here or in psmintr, because if this fails lms_enable() will 163 * never be called, so lmsintr() will never be called. 164 */ 165 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 166 } 167 168 int 169 mms_enable(v) 170 void *v; 171 { 172 struct mms_softc *sc = v; 173 174 if (sc->sc_enabled) 175 return EBUSY; 176 177 sc->sc_enabled = 1; 178 179 /* Enable interrupts. */ 180 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x07); 181 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09); 182 183 return 0; 184 } 185 186 void 187 mms_disable(v) 188 void *v; 189 { 190 struct mms_softc *sc = v; 191 192 /* Disable interrupts. */ 193 bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_ADDR, 0x87); 194 195 sc->sc_enabled = 0; 196 } 197 198 int 199 mms_ioctl(v, cmd, data, flag, p) 200 void *v; 201 u_long cmd; 202 caddr_t data; 203 int flag; 204 struct proc *p; 205 { 206 #if 0 207 struct mms_softc *sc = v; 208 #endif 209 210 switch (cmd) { 211 case WSMOUSEIO_GTYPE: 212 *(u_int *)data = WSMOUSE_TYPE_MMS; 213 return (0); 214 } 215 return (EPASSTHROUGH); 216 } 217 218 int 219 mmsintr(arg) 220 void *arg; 221 { 222 struct mms_softc *sc = arg; 223 bus_space_tag_t iot = sc->sc_iot; 224 bus_space_handle_t ioh = sc->sc_ioh; 225 u_char status; 226 signed char dx, dy; 227 u_int buttons; 228 int changed; 229 230 if (!sc->sc_enabled) 231 /* Interrupts are not expected. */ 232 return 0; 233 234 /* Freeze InPort registers (disabling interrupts). */ 235 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 236 bus_space_write_1(iot, ioh, MMS_DATA, 0x29); 237 238 bus_space_write_1(iot, ioh, MMS_ADDR, 0x00); 239 status = bus_space_read_1(iot, ioh, MMS_DATA); 240 241 if (status & 0x40) { 242 bus_space_write_1(iot, ioh, MMS_ADDR, 1); 243 dx = bus_space_read_1(iot, ioh, MMS_DATA); 244 /* Bounding at -127 avoids a bug in XFree86. */ 245 dx = (dx == -128) ? -127 : dx; 246 247 bus_space_write_1(iot, ioh, MMS_ADDR, 2); 248 dy = bus_space_read_1(iot, ioh, MMS_DATA); 249 dy = (dy == -128) ? 127 : -dy; 250 } else 251 dx = dy = 0; 252 253 /* Unfreeze InPort registers (reenabling interrupts). */ 254 bus_space_write_1(iot, ioh, MMS_ADDR, 0x07); 255 bus_space_write_1(iot, ioh, MMS_DATA, 0x09); 256 257 buttons = ((status & 0x04) ? 0x1 : 0) | 258 ((status & 0x02) ? 0x2 : 0) | 259 ((status & 0x01) ? 0x4 : 0); 260 changed = status & 0x38; 261 262 if (dx || dy || changed) 263 wsmouse_input(sc->sc_wsmousedev, 264 buttons, dx, dy, 0, WSMOUSE_INPUT_DELTA); 265 266 return -1; 267 } 268