vrdsiu_mouse.c revision 1.4
1 /* 2 * Copyright (c) 2001, 2002 Greg Hughes (greg (at) netbsd.org). All rights reserved. 3 * Copyright (c) 1999 PocketBSD Project. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Wscons mouse driver for DSIU TrackPoint on IBM WorkPad z50 by 29 * Greg Hughes (greg (at) netbsd.org). 30 * 31 * Template for interrupt/device registration taken from vrdsu.c. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: vrdsiu_mouse.c,v 1.4 2003/07/15 02:29:35 lukem Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 41 #include <dev/wscons/wsconsio.h> 42 #include <dev/wscons/wsmousevar.h> 43 44 #include <machine/bus.h> 45 #include <machine/platid.h> 46 #include <machine/platid_mask.h> 47 48 #include <hpcmips/vr/vripvar.h> 49 #include <hpcmips/vr/vrdsiureg.h> 50 #include <hpcmips/vr/cmureg.h> 51 52 enum vrdsiu_mouse_stat { 53 VRDSIU_MOUSE_STAT_DISABLE, 54 VRDSIU_MOUSE_STAT_ENABLE 55 }; 56 57 enum vrdsiu_ps2_input_state { 58 VRDSIU_PS2_INPUT_STATE_BYTE0, 59 VRDSIU_PS2_INPUT_STATE_BYTE1, 60 VRDSIU_PS2_INPUT_STATE_BYTE2 61 }; 62 63 struct vrdsiu_softc { 64 struct device sc_dev; 65 bus_space_tag_t sc_iot; 66 bus_space_handle_t sc_ioh; 67 int sc_unit; 68 void *sc_handler; 69 vrip_chipset_tag_t sc_vrip; 70 71 enum vrdsiu_mouse_stat sc_mouse_stat; 72 73 struct device *sc_wsmousedev; 74 }; 75 76 static int asimOld = 0; 77 78 static int vrdsiu_match __P((struct device *, struct cfdata *, void *)); 79 static void vrdsiu_attach __P((struct device *, struct device *, void *)); 80 81 static void vrdsiu_write __P((struct vrdsiu_softc *, int, unsigned short)); 82 static unsigned short vrdsiu_read __P((struct vrdsiu_softc *, int)); 83 84 /* Interrupt handlers */ 85 static int vrdsiu_intr __P((void *)); 86 static void vrdsiu_mouse_intr __P((struct vrdsiu_softc *)); 87 88 /* Enable/disable DSIU handling */ 89 static int vrdsiu_mouse_enable __P((void *)); 90 static int vrdsiu_mouse_ioctl __P((void *, u_long, caddr_t, int, struct proc *)); 91 static void vrdsiu_mouse_disable __P((void *)); 92 93 /* wsmouse access ops */ 94 const struct wsmouse_accessops vrdsiu_accessops = { 95 vrdsiu_mouse_enable, 96 vrdsiu_mouse_ioctl, 97 vrdsiu_mouse_disable 98 }; 99 100 CFATTACH_DECL(vrdsiu_mouse, sizeof(struct vrdsiu_softc), 101 vrdsiu_match, vrdsiu_attach, NULL, NULL); 102 103 static inline void 104 vrdsiu_write(sc, port, val) 105 struct vrdsiu_softc *sc; 106 int port; 107 unsigned short val; 108 { 109 bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val); 110 } 111 112 static inline unsigned short 113 vrdsiu_read(sc, port) 114 struct vrdsiu_softc *sc; 115 int port; 116 { 117 return bus_space_read_2(sc->sc_iot, sc->sc_ioh, port); 118 } 119 120 static int 121 vrdsiu_match(parent, cf, aux) 122 struct device *parent; 123 struct cfdata *cf; 124 void *aux; 125 { 126 return 1; 127 } 128 129 static void 130 vrdsiu_attach(parent, self, aux) 131 struct device *parent; 132 struct device *self; 133 void *aux; 134 { 135 struct vrdsiu_softc *sc = (struct vrdsiu_softc *)self; 136 struct vrip_attach_args *va = aux; 137 struct wsmousedev_attach_args wsmaa; 138 int res; 139 140 bus_space_tag_t iot = va->va_iot; 141 142 if (va->va_parent_ioh != NULL) 143 res = bus_space_subregion(iot, va->va_parent_ioh, va->va_addr, 144 va->va_size, &sc->sc_ioh); 145 else 146 res = bus_space_map(iot, va->va_addr, va->va_size, 0, 147 &sc->sc_ioh); 148 if (res != 0) { 149 printf(": can't map bus space\n"); 150 return; 151 } 152 153 sc->sc_iot = iot; 154 sc->sc_unit = va->va_unit; 155 sc->sc_vrip = va->va_vc; 156 157 /* install interrupt handler and enable interrupt */ 158 if (!(sc->sc_handler = 159 vrip_intr_establish(sc->sc_vrip, sc->sc_unit, 0, IPL_TTY, 160 vrdsiu_intr, sc))) { 161 printf(": can't map interrupt line\n"); 162 return; 163 } 164 165 /* disable the handler initially */ 166 vrdsiu_mouse_disable(sc); 167 168 printf("\n"); 169 170 /* attach the mouse */ 171 wsmaa.accessops = &vrdsiu_accessops; 172 wsmaa.accesscookie = sc; 173 sc->sc_wsmousedev = config_found(self, &wsmaa, wsmousedevprint); 174 175 /* 176 * TODO: Initialize the DSIU ourselves. 177 * We currently assume WinCE has set up the DSIU properly 178 */ 179 180 asimOld = vrdsiu_read(sc, DSIUASIM00_REG_W); 181 182 /* supply clock to the DSIU */ 183 vrip_power(sc->sc_vrip, sc->sc_unit, 1); 184 } 185 186 int 187 vrdsiu_mouse_enable(v) 188 void *v; 189 { 190 struct vrdsiu_softc *sc = v; 191 192 /* ensure the DSIU mouse is currently disabled! */ 193 if (sc->sc_mouse_stat != VRDSIU_MOUSE_STAT_DISABLE) 194 return EBUSY; 195 196 /* enable the DSIU mouse */ 197 sc->sc_mouse_stat = VRDSIU_MOUSE_STAT_ENABLE; 198 199 /* unmask interrupts */ 200 vrip_intr_setmask2(sc->sc_vrip, sc->sc_handler, (1 << 8) | (1 << 9) | (1 << 10), 1); 201 vrip_power(sc->sc_vrip, sc->sc_unit, 1); 202 203 return 0; 204 } 205 206 void 207 vrdsiu_mouse_disable(v) 208 void *v; 209 { 210 struct vrdsiu_softc *sc = v; 211 212 /* mask interrupts */ 213 vrip_intr_setmask2(sc->sc_vrip, sc->sc_handler, (1 << 8) | (1 << 9) | (1 << 10), 0); 214 215 /* disable the DSIU mouse */ 216 sc->sc_mouse_stat = VRDSIU_MOUSE_STAT_DISABLE; 217 } 218 219 int 220 vrdsiu_mouse_ioctl(v, cmd, data, flag, p) 221 void *v; 222 u_long cmd; 223 caddr_t data; 224 int flag; 225 struct proc *p; 226 { 227 /*struct vrdsiu_softc *sc = v;*/ 228 229 switch (cmd) 230 { 231 case WSMOUSEIO_GTYPE: 232 *(u_int *)data = WSMOUSE_TYPE_PS2; 233 break; 234 235 case WSMOUSEIO_SRES: 236 /* 237 * TODO: Handle setting mouse resolution 238 */ 239 break; 240 241 default: 242 return -1; 243 } 244 245 return 0; 246 } 247 248 int 249 vrdsiu_intr(arg) 250 void *arg; 251 { 252 struct vrdsiu_softc *sc = arg; 253 254 vrdsiu_mouse_intr(sc); 255 256 return 0; 257 } 258 259 /* 260 * PS/2 protocol defines 261 */ 262 #define PS2_L_BUTTON_MASK (1 << 0) 263 #define PS2_R_BUTTON_MASK (1 << 1) 264 #define PS2_M_BUTTON_MASK (1 << 2) 265 #define PS2_BYTE0_BIT3_MASK (1 << 3) 266 #define PS2_DX_SIGN_MASK (1 << 4) 267 #define PS2_DY_SIGN_MASK (1 << 5) 268 #define PS2_DX_OVERFLOW_MASK (1 << 6) 269 #define PS2_DY_OVERFLOW_MASK (1 << 7) 270 271 /* 272 * WSCONS defines 273 */ 274 #define WSC_L_BUTTON 0x01 275 #define WSC_M_BUTTON 0x02 276 #define WSC_R_BUTTON 0x04 277 278 void 279 vrdsiu_mouse_intr(sc) 280 struct vrdsiu_softc *sc; 281 { 282 u_int intrReason; 283 unsigned char b; 284 285 static int dx; 286 static int dy; 287 static u_char buttons; 288 static enum vrdsiu_ps2_input_state ps2_state = 0; 289 290 /* What caused the interrupt? */ 291 intrReason = vrdsiu_read(sc, DSIUINTR0_REG_W); 292 293 /* 294 * TODO: Check for error conditions; specifically need to handle 295 * overruns (which currently mess up the mouse). 296 */ 297 298 /* disable reception */ 299 vrdsiu_write(sc, DSIUASIM00_REG_W, asimOld & ~DSIUASIM00_RXE0); 300 301 if (intrReason & DSIUINTR0_INTSER0) 302 ps2_state = 0; 303 304 /* Ignore everything except receive notifications */ 305 if ((intrReason & DSIUINTR0_INTSR0) == 0) 306 goto done; 307 308 /* read from DSIU */ 309 b = (unsigned char)vrdsiu_read(sc, DSIURXB0L_REG_W); 310 311 /* check if the DSIU is enabled */ 312 if (sc->sc_mouse_stat == VRDSIU_MOUSE_STAT_DISABLE) 313 { 314 /* Throw away input to keep the DSIU's buffer clean */ 315 goto done; 316 } 317 318 /* 319 * PS/2 protocol interpretation 320 * 321 * A PS/2 packet consists of 3 bytes. We read them in, in order, and 322 * piece together the mouse info. 323 * 324 * Byte 0 contains button info and dx/dy signedness 325 * Byte 1 contains dx info 326 * Byte 2 contains dy info 327 * 328 * Please see PS/2 specs for detailed information; brief descriptions 329 * are provided below. 330 * 331 * PS/2 mouse specs for the TrackPoint from IBM's TrackPoint Engineering 332 * Specification Version 4.0. 333 */ 334 switch (ps2_state) 335 { 336 case VRDSIU_PS2_INPUT_STATE_BYTE0: 337 /* Bit 3 of byte 0 is always 1; we use that info to sync input */ 338 if ((b & PS2_BYTE0_BIT3_MASK) == 0) 339 goto done; 340 341 if (b & (PS2_M_BUTTON_MASK | PS2_DX_OVERFLOW_MASK | 342 PS2_DY_OVERFLOW_MASK)) 343 goto done; 344 345 /* Extract button state */ 346 buttons = ((b & PS2_L_BUTTON_MASK) ? WSC_L_BUTTON : 0) 347 | ((b & PS2_M_BUTTON_MASK) ? WSC_M_BUTTON : 0) 348 | ((b & PS2_R_BUTTON_MASK) ? WSC_R_BUTTON : 0); 349 350 /* Extract dx/dy signedness -- 9-bit 2's comp */ 351 /* dx = (b & PS2_DX_SIGN_MASK) ? 0xFFFFFFFF : 0; 352 dy = (b & PS2_DY_SIGN_MASK) ? 0xFFFFFFFF : 0; */ 353 354 ps2_state = VRDSIU_PS2_INPUT_STATE_BYTE1; 355 break; 356 357 case VRDSIU_PS2_INPUT_STATE_BYTE1: 358 /* put in the lower 8 bits of dx */ 359 dx = (signed char)b; 360 if (dx == -128) 361 dx = -127; 362 363 ps2_state = VRDSIU_PS2_INPUT_STATE_BYTE2; 364 break; 365 366 case VRDSIU_PS2_INPUT_STATE_BYTE2: 367 /* put in the lower 8 bits of dy */ 368 dy = (signed char)b; 369 if (dy == -128) 370 dy = -127; 371 372 /* We now have a complete packet; send to wscons */ 373 wsmouse_input(sc->sc_wsmousedev, 374 buttons, 375 dx, 376 dy, 377 0, 378 WSMOUSE_INPUT_DELTA); 379 380 ps2_state = VRDSIU_PS2_INPUT_STATE_BYTE0; 381 break; 382 } 383 384 done: 385 /* clear the interrupt */ 386 vrdsiu_write(sc, DSIUINTR0_REG_W, intrReason); 387 388 /* enable reception */ 389 vrdsiu_write(sc, DSIUASIM00_REG_W, asimOld | DSIUASIM00_RXE0); 390 } 391
Indexes created Sun Sep 28 12:09:53 GMT 2025