2a09e1c999
probing. Make sure to not initialize the protocol more than once, see rev. 1.11 of the old psm_intelli.c driver (this caused hangs when starting X). Unify the "ignore garbage" behaviour (which we already did if PMS_STANDARD protocol was used), the old intelli-driver did the same and on some scroll mice a stream of garbage is emitted shortly after reset.
629 lines
14 KiB
C
629 lines
14 KiB
C
/* $NetBSD: pms.c,v 1.6 2002/05/29 09:30:35 martin Exp $ */
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/*-
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* Copyright (c) 1994 Charles M. Hannum.
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* Copyright (c) 1992, 1993 Erik Forsberg.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: pms.c,v 1.6 2002/05/29 09:30:35 martin Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/ioctl.h>
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#include <sys/kthread.h>
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#include <machine/bus.h>
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#include <dev/ic/pckbcvar.h>
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#include <dev/pckbc/pmsreg.h>
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#include <dev/wscons/wsconsio.h>
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#include <dev/wscons/wsmousevar.h>
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#ifdef PMSDEBUG
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int pmsdebug = 1;
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#define DPRINTF(x) if (pmsdebug) printf x
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#else
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#define DPRINTF(x)
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#endif
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enum pms_type { PMS_UNKNOWN, PMS_STANDARD, PMS_SCROLL3, PMS_SCROLL5 };
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struct pms_protocol {
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int rates[3];
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int response;
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const char *name;
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} pms_protocols[] = {
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{ { 0, 0, 0 }, 0, "unknown protocol" },
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{ { 0, 0, 0 }, 0, "no scroll wheel (3 buttons)" },
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{ { 200, 100, 80 }, 3, "scroll wheel (3 buttons)" },
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{ { 200, 200, 80 }, 4, "scroll wheel (5 buttons)" }
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};
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enum pms_type tries[] = {
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PMS_SCROLL5, PMS_SCROLL3, PMS_STANDARD, PMS_UNKNOWN
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};
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struct pms_softc { /* driver status information */
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struct device sc_dev;
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pckbc_tag_t sc_kbctag;
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int sc_kbcslot;
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int sc_enabled; /* input enabled? */
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#ifndef PMS_DISABLE_POWERHOOK
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void *sc_powerhook; /* cookie from power hook */
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#endif /* !PMS_DISABLE_POWERHOOK */
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int inputstate; /* number of bytes received for this packet */
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u_int buttons; /* mouse button status */
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enum pms_type protocol;
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unsigned char packet[4];
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struct timeval last, current;
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struct device *sc_wsmousedev;
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struct proc *sc_event_thread;
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};
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int pmsprobe __P((struct device *, struct cfdata *, void *));
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void pmsattach __P((struct device *, struct device *, void *));
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void pmsinput __P((void *, int));
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struct cfattach pms_ca = {
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sizeof(struct pms_softc), pmsprobe, pmsattach,
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};
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static int pms_protocol __P((pckbc_tag_t, pckbc_slot_t));
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static void do_enable __P((struct pms_softc *));
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static void do_disable __P((struct pms_softc *));
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static void pms_reset_thread __P((void*));
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static void pms_spawn_reset_thread __P((void*));
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int pms_enable __P((void *));
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int pms_ioctl __P((void *, u_long, caddr_t, int, struct proc *));
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void pms_disable __P((void *));
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#ifndef PMS_DISABLE_POWERHOOK
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void pms_power __P((int, void *));
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#endif /* !PMS_DISABLE_POWERHOOK */
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const struct wsmouse_accessops pms_accessops = {
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pms_enable,
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pms_ioctl,
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pms_disable,
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};
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static int
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pms_protocol(tag, slot)
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pckbc_tag_t tag;
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pckbc_slot_t slot;
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{
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u_char cmd[2], resp[1];
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int i, j, res;
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struct pms_protocol *p;
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for (j = 0; j < sizeof(tries) / sizeof(tries[0]); ++j) {
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p = &pms_protocols[tries[j]];
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if (!p->rates[0])
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break;
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cmd[0] = PMS_SET_SAMPLE;
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for (i = 0; i < 3; i++) {
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cmd[1] = p->rates[i];
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res = pckbc_enqueue_cmd(tag, slot, cmd, 2, 0, 1, 0);
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if (res)
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return PMS_STANDARD;
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}
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cmd[0] = PMS_SEND_DEV_ID;
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res = pckbc_enqueue_cmd(tag, slot, cmd, 1, 1, 1, resp);
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if (res)
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return 0;
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if (resp[0] == p->response) {
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DPRINTF(("pms_protocol: found mouse protocol %d\n",
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tries[j]));
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return tries[j];
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}
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}
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DPRINTF(("pms_protocol: standard PS/2 protocol (no scroll wheel)\n"));
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return PMS_STANDARD;
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}
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int
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pmsprobe(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct pckbc_attach_args *pa = aux;
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u_char cmd[1], resp[2];
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int res;
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if (pa->pa_slot != PCKBC_AUX_SLOT)
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return (0);
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/* Flush any garbage. */
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pckbc_flush(pa->pa_tag, pa->pa_slot);
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/* reset the device */
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cmd[0] = PMS_RESET;
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res = pckbc_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 2, resp, 1);
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if (res) {
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#ifdef DEBUG
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printf("pmsprobe: reset error %d\n", res);
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#endif
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return (0);
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}
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if (resp[0] != PMS_RSTDONE) {
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printf("pmsprobe: reset response 0x%x\n", resp[0]);
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return (0);
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}
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/* get type number (0 = mouse) */
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if (resp[1] != 0) {
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#ifdef DEBUG
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printf("pmsprobe: type 0x%x\n", resp[1]);
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#endif
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return (0);
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}
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return (10);
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}
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void
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pmsattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct pms_softc *sc = (void *)self;
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struct pckbc_attach_args *pa = aux;
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struct wsmousedev_attach_args a;
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u_char cmd[1], resp[2];
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int res;
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sc->sc_kbctag = pa->pa_tag;
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sc->sc_kbcslot = pa->pa_slot;
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printf("\n");
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/* Flush any garbage. */
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pckbc_flush(pa->pa_tag, pa->pa_slot);
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/* reset the device */
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cmd[0] = PMS_RESET;
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res = pckbc_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 2, resp, 1);
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#ifdef DEBUG
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if (res || resp[0] != PMS_RSTDONE || resp[1] != 0) {
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printf("pmsattach: reset error\n");
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return;
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}
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#endif
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sc->inputstate = 0;
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sc->buttons = 0;
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sc->protocol = PMS_UNKNOWN;
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pckbc_set_inputhandler(sc->sc_kbctag, sc->sc_kbcslot,
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pmsinput, sc, sc->sc_dev.dv_xname);
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a.accessops = &pms_accessops;
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a.accesscookie = sc;
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/*
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* Attach the wsmouse, saving a handle to it.
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* Note that we don't need to check this pointer against NULL
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* here or in pmsintr, because if this fails pms_enable() will
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* never be called, so pmsinput() will never be called.
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*/
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sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint);
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/* no interrupts until enabled */
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cmd[0] = PMS_DEV_DISABLE;
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res = pckbc_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 0, 0, 0);
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if (res)
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printf("pmsattach: disable error\n");
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pckbc_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 0);
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kthread_create(pms_spawn_reset_thread, sc);
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#ifndef PMS_DISABLE_POWERHOOK
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sc->sc_powerhook = powerhook_establish(pms_power, sc);
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#endif /* !PMS_DISABLE_POWERHOOK */
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}
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static void
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do_enable(sc)
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struct pms_softc *sc;
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{
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u_char cmd[1];
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int res;
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#ifdef PMS_PREFER_PROTOCOL
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int i;
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#endif
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sc->inputstate = 0;
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sc->buttons = 0;
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pckbc_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 1);
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cmd[0] = PMS_DEV_ENABLE;
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res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, cmd, 1, 0, 1, 0);
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if (res)
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printf("pms_enable: command error %d\n", res);
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if (sc->protocol == PMS_UNKNOWN)
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sc->protocol = pms_protocol(sc->sc_kbctag, sc->sc_kbcslot);
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DPRINTF(("pms_enable: using %s protocol\n",
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pms_protocols[sc->protocol].name));
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#if 0
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{
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u_char scmd[2];
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scmd[0] = PMS_SET_RES;
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scmd[1] = 3; /* 8 counts/mm */
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res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, scmd,
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2, 0, 1, 0);
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if (res)
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printf("pms_enable: setup error1 (%d)\n", res);
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scmd[0] = PMS_SET_SCALE21;
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res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, scmd,
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1, 0, 1, 0);
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if (res)
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printf("pms_enable: setup error2 (%d)\n", res);
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scmd[0] = PMS_SET_SAMPLE;
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scmd[1] = 100; /* 100 samples/sec */
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res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, scmd,
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2, 0, 1, 0);
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if (res)
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printf("pms_enable: setup error3 (%d)\n", res);
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}
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#endif
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}
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static void
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do_disable(sc)
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struct pms_softc *sc;
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{
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u_char cmd[1];
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int res;
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cmd[0] = PMS_DEV_DISABLE;
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res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, cmd, 1, 0, 1, 0);
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if (res)
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printf("pms_disable: command error\n");
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pckbc_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 0);
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}
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int
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pms_enable(v)
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void *v;
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{
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struct pms_softc *sc = v;
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int s;
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if (sc->sc_enabled)
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return EBUSY;
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do_enable(sc);
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s = spltty();
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sc->sc_enabled = 1;
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splx(s);
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return 0;
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}
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void
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pms_disable(v)
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void *v;
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{
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struct pms_softc *sc = v;
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int s;
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do_disable(sc);
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s = spltty();
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sc->sc_enabled = 0;
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splx(s);
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}
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#ifndef PMS_DISABLE_POWERHOOK
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void
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pms_power(why, v)
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int why;
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void *v;
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{
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struct pms_softc *sc = v;
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switch (why) {
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case PWR_SUSPEND:
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case PWR_STANDBY:
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if (sc->sc_enabled)
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do_disable(sc);
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break;
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case PWR_RESUME:
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if (sc->sc_enabled) {
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sc->protocol = PMS_UNKNOWN; /* recheck protocol & init mouse */
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do_enable(sc);
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}
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case PWR_SOFTSUSPEND:
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case PWR_SOFTSTANDBY:
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case PWR_SOFTRESUME:
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break;
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}
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}
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#endif /* !PMS_DISABLE_POWERHOOK */
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int
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pms_ioctl(v, cmd, data, flag, p)
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void *v;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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struct pms_softc *sc = v;
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u_char kbcmd[2];
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int i;
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switch (cmd) {
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case WSMOUSEIO_GTYPE:
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*(u_int *)data = WSMOUSE_TYPE_PS2;
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break;
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case WSMOUSEIO_SRES:
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i = (*(u_int *)data - 12) / 25;
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if (i < 0)
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i = 0;
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if (i > 3)
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i = 3;
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kbcmd[0] = PMS_SET_RES;
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kbcmd[1] = i;
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i = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, kbcmd,
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2, 0, 1, 0);
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if (i)
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printf("pms_ioctl: SET_RES command error\n");
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break;
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default:
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return (EPASSTHROUGH);
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}
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return (0);
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}
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|
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static void
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pms_spawn_reset_thread(arg)
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void *arg;
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{
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struct pms_softc *sc = arg;
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kthread_create1(pms_reset_thread, sc, &sc->sc_event_thread,
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sc->sc_dev.dv_xname);
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}
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static void
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pms_reset_thread(arg)
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void *arg;
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{
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struct pms_softc *sc = arg;
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u_char cmd[1], resp[2];
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int res;
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|
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for (;;) {
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tsleep(&sc->sc_enabled, PWAIT, "pmsreset", 0);
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#ifdef PMSDEBUG
|
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if (pmsdebug)
|
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#endif
|
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#if defined(PMSDEBUG) || defined(DIAGNOSTIC)
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printf("%s: resetting mouse interface\n",
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sc->sc_dev.dv_xname);
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#endif
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pms_disable(sc);
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cmd[0] = PMS_RESET;
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res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot, cmd, 1,
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2, 1, resp);
|
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if (res)
|
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DPRINTF(("%s: reset error %d\n", sc->sc_dev.dv_xname,
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res));
|
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sc->protocol = PMS_UNKNOWN; /* reprobe protocol */
|
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pms_enable(sc);
|
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}
|
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}
|
|
|
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/* Masks for the first byte of a packet */
|
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#define PMS_LBUTMASK 0x01
|
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#define PMS_RBUTMASK 0x02
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#define PMS_MBUTMASK 0x04
|
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#define PMS_4BUTMASK 0x10
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#define PMS_5BUTMASK 0x20
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|
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void
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pmsinput(vsc, data)
|
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void *vsc;
|
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int data;
|
|
{
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struct pms_softc *sc = vsc;
|
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u_int changed;
|
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int dx, dy, dz = 0;
|
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int newbuttons = 0;
|
|
|
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if (!sc->sc_enabled) {
|
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/* Interrupts are not expected. Discard the byte. */
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return;
|
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}
|
|
|
|
microtime(&sc->current);
|
|
if (sc->inputstate > 0) {
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struct timeval diff;
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|
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timersub(&sc->current, &sc->last, &diff);
|
|
/*
|
|
* Empirically, the delay should be about 1700us on a standard
|
|
* PS/2 port. I have seen delays as large as 4500us (rarely)
|
|
* in regular use. When using a confused mouse, I generally
|
|
* see delays at least as large as 30,000us. This serves as
|
|
* a rough geometric compromise. -seebs
|
|
*
|
|
* The thinkpad trackball returns at 22-23ms. So we use
|
|
* 25ms. In the future, I'll implement adaptable timeout
|
|
* by increasing the timeout if the mouse reset happens
|
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* too frequently -christos
|
|
*/
|
|
if (diff.tv_sec > 0 || diff.tv_usec > 25000) {
|
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DPRINTF(("pms_input: unusual delay (%ld.%06ld s), "
|
|
"scheduling reset\n",
|
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(long)diff.tv_sec, (long)diff.tv_usec));
|
|
sc->inputstate = 0;
|
|
sc->sc_enabled = 0;
|
|
wakeup(&sc->sc_enabled);
|
|
return;
|
|
}
|
|
}
|
|
sc->last = sc->current;
|
|
|
|
if (sc->inputstate == 0) {
|
|
/*
|
|
* Some devices (seen on trackballs anytime, and on some mice shortly after
|
|
* reset) output garbage bytes between packets.
|
|
* Just ignore them.
|
|
*/
|
|
if ((data & 0xc0) != 0)
|
|
return; /* not in sync yet, discard input */
|
|
}
|
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|
|
sc->packet[sc->inputstate++] = data & 0xff;
|
|
switch (sc->inputstate) {
|
|
case 0:
|
|
/* no useful processing can be done yet */
|
|
break;
|
|
|
|
case 1:
|
|
/*
|
|
* Why should we test for bit 0x8 and insist on it here?
|
|
* The old (psm.c and psm_intelli.c) drivers didn't do
|
|
* it, and there are devices where it does harm (that's
|
|
* why it is not used if using PMS_STANDARD protocol).
|
|
* Anyway, it does not to cause any harm to accept packets
|
|
* without this bit.
|
|
*/
|
|
#if 0
|
|
if (sc->protocol == PMS_STANDARD)
|
|
break;
|
|
if (!(sc->packet[0] & 0x8)) {
|
|
DPRINTF(("pmsinput: 0x8 not set in first byte "
|
|
"[0x%02x], resetting\n", sc->packet[0]));
|
|
sc->inputstate = 0;
|
|
sc->sc_enabled = 0;
|
|
wakeup(&sc->sc_enabled);
|
|
return;
|
|
}
|
|
#endif
|
|
break;
|
|
|
|
case 2:
|
|
break;
|
|
|
|
case 4:
|
|
/* Case 4 is a superset of case 3. This is *not* an accident. */
|
|
if (sc->protocol == PMS_SCROLL3) {
|
|
dz = sc->packet[3];
|
|
if (dz >= 128)
|
|
dz -= 256;
|
|
if (dz == -128)
|
|
dz = -127;
|
|
} else if (sc->protocol == PMS_SCROLL5) {
|
|
dz = sc->packet[3] & 0xf;
|
|
if (dz >= 8)
|
|
dz -= 16;
|
|
if (sc->packet[3] & PMS_4BUTMASK)
|
|
newbuttons |= 0x8;
|
|
if (sc->packet[3] & PMS_5BUTMASK)
|
|
newbuttons |= 0x10;
|
|
} else {
|
|
DPRINTF(("pmsinput: why am I looking at this byte?\n"));
|
|
dz = 0;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case 3:
|
|
/*
|
|
* This is only an endpoint for scroll protocols with 4
|
|
* bytes, or the standard protocol with 3.
|
|
*/
|
|
if (sc->protocol != PMS_STANDARD && sc->inputstate == 3)
|
|
break;
|
|
|
|
newbuttons |= ((sc->packet[0] & PMS_LBUTMASK) ? 0x1 : 0) |
|
|
((sc->packet[0] & PMS_MBUTMASK) ? 0x2 : 0) |
|
|
((sc->packet[0] & PMS_RBUTMASK) ? 0x4 : 0);
|
|
|
|
dx = sc->packet[1];
|
|
if (dx >= 128)
|
|
dx -= 256;
|
|
if (dx == -128)
|
|
dx = -127;
|
|
|
|
dy = sc->packet[2];
|
|
if (dy >= 128)
|
|
dy -= 256;
|
|
if (dy == -128)
|
|
dy = -127;
|
|
|
|
sc->inputstate = 0;
|
|
changed = (sc->buttons ^ newbuttons);
|
|
sc->buttons = newbuttons;
|
|
|
|
#ifdef PMSDEBUG
|
|
if (sc->protocol == PMS_STANDARD) {
|
|
DPRINTF(("pms: packet: 0x%02x%02x%02x\n",
|
|
sc->packet[0], sc->packet[1], sc->packet[2]));
|
|
} else {
|
|
DPRINTF(("pms: packet: 0x%02x%02x%02x%02x\n",
|
|
sc->packet[0], sc->packet[1], sc->packet[2],
|
|
sc->packet[3]));
|
|
}
|
|
#endif
|
|
if (dx || dy || dz || changed) {
|
|
#ifdef PMSDEBUG
|
|
DPRINTF(("pms: x %+03d y %+03d z %+03d "
|
|
"buttons 0x%02x\n", dx, dy, dz, sc->buttons));
|
|
#endif
|
|
wsmouse_input(sc->sc_wsmousedev,
|
|
sc->buttons, dx, dy, dz,
|
|
WSMOUSE_INPUT_DELTA);
|
|
}
|
|
memset(sc->packet, 0, 4);
|
|
break;
|
|
|
|
/* If we get here, we have problems. */
|
|
default:
|
|
printf("pmsinput: very confused. resetting.\n");
|
|
sc->inputstate = 0;
|
|
sc->sc_enabled = 0;
|
|
wakeup(&sc->sc_enabled);
|
|
return;
|
|
}
|
|
}
|