Annotation of sys/dev/pckbc/pms.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: pms.c,v 1.1 2007/08/01 12:16:59 kettenis Exp $ */
! 2: /* $NetBSD: psm.c,v 1.11 2000/06/05 22:20:57 sommerfeld Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1994 Charles M. Hannum.
! 6: * Copyright (c) 1992, 1993 Erik Forsberg.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: *
! 15: * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
! 16: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
! 17: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
! 18: * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
! 19: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 20: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
! 21: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
! 22: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
! 23: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
! 24: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 25: */
! 26:
! 27: #include <sys/param.h>
! 28: #include <sys/systm.h>
! 29: #include <sys/device.h>
! 30: #include <sys/ioctl.h>
! 31:
! 32: #include <machine/bus.h>
! 33:
! 34: #include <dev/ic/pckbcvar.h>
! 35:
! 36: #include <dev/pckbc/pmsreg.h>
! 37:
! 38: #include <dev/wscons/wsconsio.h>
! 39: #include <dev/wscons/wsmousevar.h>
! 40:
! 41: struct pms_softc { /* driver status information */
! 42: struct device sc_dev;
! 43:
! 44: pckbc_tag_t sc_kbctag;
! 45: int sc_kbcslot;
! 46:
! 47: int sc_enabled; /* input enabled? */
! 48: int inputstate;
! 49: u_int buttons, oldbuttons; /* mouse button status */
! 50: signed char dx;
! 51:
! 52: struct device *sc_wsmousedev;
! 53: };
! 54:
! 55: int pmsprobe(struct device *, void *, void *);
! 56: void pmsattach(struct device *, struct device *, void *);
! 57: void pmsinput(void *, int);
! 58:
! 59: struct cfattach pms_ca = {
! 60: sizeof(struct pms_softc), pmsprobe, pmsattach,
! 61: };
! 62:
! 63: int pms_enable(void *);
! 64: int pms_ioctl(void *, u_long, caddr_t, int, struct proc *);
! 65: void pms_disable(void *);
! 66:
! 67: const struct wsmouse_accessops pms_accessops = {
! 68: pms_enable,
! 69: pms_ioctl,
! 70: pms_disable,
! 71: };
! 72:
! 73: int
! 74: pmsprobe(parent, match, aux)
! 75: struct device *parent;
! 76: void *match;
! 77: void *aux;
! 78: {
! 79: struct pckbc_attach_args *pa = aux;
! 80: u_char cmd[1], resp[2];
! 81: int res;
! 82:
! 83: if (pa->pa_slot != PCKBC_AUX_SLOT)
! 84: return (0);
! 85:
! 86: /* Flush any garbage. */
! 87: pckbc_flush(pa->pa_tag, pa->pa_slot);
! 88:
! 89: /* reset the device */
! 90: cmd[0] = PMS_RESET;
! 91: res = pckbc_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 2, resp, 1);
! 92: if (res) {
! 93: #ifdef DEBUG
! 94: printf("pmsprobe: reset error %d\n", res);
! 95: #endif
! 96: return (0);
! 97: }
! 98: if (resp[0] != PMS_RSTDONE) {
! 99: printf("pmsprobe: reset response 0x%x\n", resp[0]);
! 100: return (0);
! 101: }
! 102:
! 103: /* get type number (0 = mouse) */
! 104: if (resp[1] != 0) {
! 105: #ifdef DEBUG
! 106: printf("pmsprobe: type 0x%x\n", resp[1]);
! 107: #endif
! 108: return (0);
! 109: }
! 110:
! 111: return (10);
! 112: }
! 113:
! 114: void
! 115: pmsattach(parent, self, aux)
! 116: struct device *parent, *self;
! 117: void *aux;
! 118: {
! 119: struct pms_softc *sc = (void *)self;
! 120: struct pckbc_attach_args *pa = aux;
! 121: struct wsmousedev_attach_args a;
! 122: u_char cmd[1], resp[2];
! 123: int res;
! 124:
! 125: sc->sc_kbctag = pa->pa_tag;
! 126: sc->sc_kbcslot = pa->pa_slot;
! 127:
! 128: printf("\n");
! 129:
! 130: /* Flush any garbage. */
! 131: pckbc_flush(pa->pa_tag, pa->pa_slot);
! 132:
! 133: /* reset the device */
! 134: cmd[0] = PMS_RESET;
! 135: res = pckbc_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 2, resp, 1);
! 136: #ifdef DEBUG
! 137: if (res || resp[0] != PMS_RSTDONE || resp[1] != 0) {
! 138: printf("pmsattach: reset error\n");
! 139: return;
! 140: }
! 141: #endif
! 142:
! 143: sc->inputstate = 0;
! 144: sc->oldbuttons = 0;
! 145:
! 146: pckbc_set_inputhandler(sc->sc_kbctag, sc->sc_kbcslot,
! 147: pmsinput, sc, sc->sc_dev.dv_xname);
! 148:
! 149: a.accessops = &pms_accessops;
! 150: a.accesscookie = sc;
! 151:
! 152: /*
! 153: * Attach the wsmouse, saving a handle to it.
! 154: * Note that we don't need to check this pointer against NULL
! 155: * here or in pmsintr, because if this fails pms_enable() will
! 156: * never be called, so pmsinput() will never be called.
! 157: */
! 158: sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint);
! 159:
! 160: /* no interrupts until enabled */
! 161: cmd[0] = PMS_DEV_DISABLE;
! 162: res = pckbc_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 0, 0, 0);
! 163: if (res)
! 164: printf("pmsattach: disable error\n");
! 165: pckbc_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 0);
! 166: }
! 167:
! 168: int
! 169: pms_enable(v)
! 170: void *v;
! 171: {
! 172: struct pms_softc *sc = v;
! 173: u_char cmd[1];
! 174: int res;
! 175:
! 176: if (sc->sc_enabled)
! 177: return EBUSY;
! 178:
! 179: sc->sc_enabled = 1;
! 180: sc->inputstate = 0;
! 181: sc->oldbuttons = 0;
! 182:
! 183: pckbc_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 1);
! 184:
! 185: cmd[0] = PMS_DEV_ENABLE;
! 186: res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, cmd, 1, 0, 1, 0);
! 187: if (res)
! 188: printf("pms_enable: command error\n");
! 189: #if 0
! 190: {
! 191: u_char scmd[2];
! 192:
! 193: scmd[0] = PMS_SET_RES;
! 194: scmd[1] = 3; /* 8 counts/mm */
! 195: res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, scmd,
! 196: 2, 0, 1, 0);
! 197: if (res)
! 198: printf("pms_enable: setup error1 (%d)\n", res);
! 199:
! 200: scmd[0] = PMS_SET_SCALE21;
! 201: res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, scmd,
! 202: 1, 0, 1, 0);
! 203: if (res)
! 204: printf("pms_enable: setup error2 (%d)\n", res);
! 205:
! 206: scmd[0] = PMS_SET_SAMPLE;
! 207: scmd[1] = 100; /* 100 samples/sec */
! 208: res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, scmd,
! 209: 2, 0, 1, 0);
! 210: if (res)
! 211: printf("pms_enable: setup error3 (%d)\n", res);
! 212: }
! 213: #endif
! 214:
! 215: return 0;
! 216: }
! 217:
! 218: void
! 219: pms_disable(v)
! 220: void *v;
! 221: {
! 222: struct pms_softc *sc = v;
! 223: u_char cmd[1];
! 224: int res;
! 225:
! 226: cmd[0] = PMS_DEV_DISABLE;
! 227: res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, cmd, 1, 0, 1, 0);
! 228: if (res)
! 229: printf("pms_disable: command error\n");
! 230:
! 231: pckbc_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 0);
! 232:
! 233: sc->sc_enabled = 0;
! 234: }
! 235:
! 236: int
! 237: pms_ioctl(v, cmd, data, flag, p)
! 238: void *v;
! 239: u_long cmd;
! 240: caddr_t data;
! 241: int flag;
! 242: struct proc *p;
! 243: {
! 244: struct pms_softc *sc = v;
! 245: u_char kbcmd[2];
! 246: int i;
! 247:
! 248: switch (cmd) {
! 249: case WSMOUSEIO_GTYPE:
! 250: *(u_int *)data = WSMOUSE_TYPE_PS2;
! 251: break;
! 252:
! 253: case WSMOUSEIO_SRES:
! 254: i = ((int) *(u_int *)data - 12) / 25;
! 255: /* valid values are {0,1,2,3} */
! 256: if (i < 0)
! 257: i = 0;
! 258: if (i > 3)
! 259: i = 3;
! 260:
! 261: kbcmd[0] = PMS_SET_RES;
! 262: kbcmd[1] = (unsigned char) i;
! 263: i = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, kbcmd,
! 264: 2, 0, 1, 0);
! 265:
! 266: if (i)
! 267: printf("pms_ioctl: SET_RES command error\n");
! 268: break;
! 269:
! 270: default:
! 271: return (-1);
! 272: }
! 273: return (0);
! 274: }
! 275:
! 276: /* Masks for the first byte of a packet */
! 277: #define PS2LBUTMASK 0x01
! 278: #define PS2RBUTMASK 0x02
! 279: #define PS2MBUTMASK 0x04
! 280:
! 281: void pmsinput(vsc, data)
! 282: void *vsc;
! 283: int data;
! 284: {
! 285: struct pms_softc *sc = vsc;
! 286: signed char dy;
! 287: u_int changed;
! 288:
! 289: if (!sc->sc_enabled) {
! 290: /* Interrupts are not expected. Discard the byte. */
! 291: return;
! 292: }
! 293:
! 294: switch (sc->inputstate) {
! 295:
! 296: case 0:
! 297: if ((data & 0xc0) == 0) { /* no ovfl, bit 3 == 1 too? */
! 298: sc->buttons = ((data & PS2LBUTMASK) ? 0x1 : 0) |
! 299: ((data & PS2MBUTMASK) ? 0x2 : 0) |
! 300: ((data & PS2RBUTMASK) ? 0x4 : 0);
! 301: ++sc->inputstate;
! 302: }
! 303: break;
! 304:
! 305: case 1:
! 306: sc->dx = data;
! 307: /* Bounding at -127 avoids a bug in XFree86. */
! 308: sc->dx = (sc->dx == -128) ? -127 : sc->dx;
! 309: ++sc->inputstate;
! 310: break;
! 311:
! 312: case 2:
! 313: dy = data;
! 314: dy = (dy == -128) ? -127 : dy;
! 315: sc->inputstate = 0;
! 316:
! 317: changed = (sc->buttons ^ sc->oldbuttons);
! 318: sc->oldbuttons = sc->buttons;
! 319:
! 320: if (sc->dx || dy || changed)
! 321: wsmouse_input(sc->sc_wsmousedev,
! 322: sc->buttons, sc->dx, dy, 0, 0,
! 323: WSMOUSE_INPUT_DELTA);
! 324: break;
! 325: }
! 326:
! 327: return;
! 328: }
! 329:
! 330: struct cfdriver pms_cd = {
! 331: NULL, "pms", DV_DULL
! 332: };
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