435 lines
11 KiB
C
435 lines
11 KiB
C
/* $NetBSD: zsms.c,v 1.14 2006/03/31 17:39:33 thorpej Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ms.c 8.1 (Berkeley) 6/11/93
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*/
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/*
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* VSXXX mice attached with channel A of the 1st SCC
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: zsms.c,v 1.14 2006/03/31 17:39:33 thorpej 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/syslog.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/tty.h>
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#include <dev/ic/z8530reg.h>
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#include <machine/z8530var.h>
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#include <dev/dec/lk201.h>
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#include <dev/wscons/wsconsio.h>
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#include <dev/wscons/wsmousevar.h>
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#include "locators.h"
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/*
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* How many input characters we can buffer.
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* The port-specific var.h may override this.
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* Note: must be a power of two!
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*/
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#define ZSMS_RX_RING_SIZE 256
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#define ZSMS_RX_RING_MASK (ZSMS_RX_RING_SIZE-1)
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/*
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* Output buffer. Only need a few chars.
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*/
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#define ZSMS_TX_RING_SIZE 16
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#define ZSMS_TX_RING_MASK (ZSMS_TX_RING_SIZE-1)
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#define ZSMS_BPS 4800
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struct zsms_softc { /* driver status information */
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struct device zsms_dev; /* required first: base device */
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struct zs_chanstate *zsms_cs;
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/* Flags to communicate with zsms_softintr() */
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volatile int zsms_intr_flags;
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#define INTR_RX_OVERRUN 1
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#define INTR_TX_EMPTY 2
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#define INTR_ST_CHECK 4
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/*
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* The receive ring buffer.
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*/
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u_int zsms_rbget; /* ring buffer `get' index */
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volatile u_int zsms_rbput; /* ring buffer `put' index */
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u_short zsms_rbuf[ZSMS_RX_RING_SIZE]; /* rr1, data pairs */
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int sc_enabled; /* input enabled? */
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int sc_selftest; /* self test in progress */
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int inputstate;
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u_int buttons;
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int dx, dy;
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struct device *sc_wsmousedev;
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};
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static struct zsops zsops_zsms;
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static int zsms_match(struct device *, struct cfdata *, void *);
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static void zsms_attach(struct device *, struct device *, void *);
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static void zsms_input(void *, int);
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CFATTACH_DECL(zsms, sizeof(struct zsms_softc),
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zsms_match, zsms_attach, NULL, NULL);
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static int zsms_enable(void *);
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static int zsms_ioctl(void *, u_long, caddr_t, int, struct lwp *);
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static void zsms_disable(void *);
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static const struct wsmouse_accessops zsms_accessops = {
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zsms_enable,
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zsms_ioctl,
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zsms_disable,
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};
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static int
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zsms_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct zsc_attach_args *args = aux;
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/* Exact match is better than wildcard. */
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if (cf->cf_loc[ZSCCF_CHANNEL] == args->channel)
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return 2;
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/* This driver accepts wildcard. */
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if (cf->cf_loc[ZSCCF_CHANNEL] == ZSCCF_CHANNEL_DEFAULT)
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return 1;
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return 0;
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}
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static void
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zsms_attach(struct device *parent, struct device *self, void *aux)
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{
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struct zsc_softc *zsc = device_private(parent);
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struct zsms_softc *zsms = device_private(self);
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struct zsc_attach_args *args = aux;
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struct zs_chanstate *cs;
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struct wsmousedev_attach_args a;
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int s;
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cs = zsc->zsc_cs[args->channel];
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cs->cs_private = zsms;
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cs->cs_ops = &zsops_zsms;
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zsms->zsms_cs = cs;
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printf("\n");
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/* Initialize the speed, etc. */
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s = splzs();
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/* May need reset... */
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zs_write_reg(cs, 9, ZSWR9_A_RESET);
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/* These are OK as set by zscc: WR3, WR5 */
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/* We don't care about status or tx interrupts. */
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cs->cs_preg[1] = ZSWR1_RIE;
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(void) zs_set_speed(cs, ZSMS_BPS);
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/* mouse wants odd parity */
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cs->cs_preg[4] |= ZSWR4_PARENB;
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/* cs->cs_preg[4] &= ~ZSWR4_EVENP; (no-op) */
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zs_loadchannelregs(cs);
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splx(s);
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a.accessops = &zsms_accessops;
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a.accesscookie = zsms;
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zsms->sc_enabled = 0;
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zsms->sc_selftest = 0;
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zsms->sc_wsmousedev = config_found(self, &a, wsmousedevprint);
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}
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static int
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zsms_enable(void *v)
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{
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struct zsms_softc *sc = v;
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if (sc->sc_enabled)
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return EBUSY;
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sc->sc_selftest = 4; /* wait for 4 byte reply upto 1/2 sec */
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zs_write_data(sc->zsms_cs, MOUSE_SELF_TEST);
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(void)tsleep(zsms_enable, TTIPRI, "zsmsopen", hz / 2);
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if (sc->sc_selftest != 0) {
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sc->sc_selftest = 0;
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return ENXIO;
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}
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/* XXX DELAY before mode set? */
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zs_write_data(sc->zsms_cs, MOUSE_INCREMENTAL);
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sc->sc_enabled = 1;
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sc->inputstate = 0;
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return 0;
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}
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static void
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zsms_disable(void *v)
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{
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struct zsms_softc *sc = v;
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sc->sc_enabled = 0;
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}
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static int
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zsms_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct lwp *l)
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{
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if (cmd == WSMOUSEIO_GTYPE) {
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*(u_int *)data = WSMOUSE_TYPE_VSXXX;
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return 0;
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}
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return EPASSTHROUGH;
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}
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static void
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zsms_input(void *vsc, int data)
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{
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struct zsms_softc *sc = vsc;
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if (sc->sc_enabled == 0) {
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if (sc->sc_selftest > 0) {
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sc->sc_selftest -= 1;
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if (sc->sc_selftest == 0)
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wakeup(zsms_enable);
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}
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return;
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}
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if ((data & MOUSE_START_FRAME) != 0)
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sc->inputstate = 1;
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else
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sc->inputstate++;
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if (sc->inputstate == 1) {
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/* LMR -> RML: wsevents counts 0 for the left-most */
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sc->buttons = data & 02;
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if (data & 01)
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sc->buttons |= 04;
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if (data & 04)
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sc->buttons |= 01;
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sc->dx = data & MOUSE_X_SIGN;
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sc->dy = data & MOUSE_Y_SIGN;
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} else if (sc->inputstate == 2) {
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if (sc->dx == 0)
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sc->dx = -data;
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else
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sc->dx = data;
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} else if (sc->inputstate == 3) {
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sc->inputstate = 0;
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if (sc->dy == 0)
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sc->dy = -data;
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else
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sc->dy = data;
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wsmouse_input(sc->sc_wsmousedev, sc->buttons,
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sc->dx, sc->dy, 0, WSMOUSE_INPUT_DELTA);
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}
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return;
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}
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/****************************************************************
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* Interface to the lower layer (zscc)
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****************************************************************/
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static void zsms_rxint(struct zs_chanstate *);
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static void zsms_stint(struct zs_chanstate *, int);
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static void zsms_txint(struct zs_chanstate *);
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static void zsms_softint(struct zs_chanstate *);
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static void
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zsms_rxint(struct zs_chanstate *cs)
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{
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struct zsms_softc *zsms;
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int put, put_next;
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u_char c, rr1;
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zsms = cs->cs_private;
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put = zsms->zsms_rbput;
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/*
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* First read the status, because reading the received char
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* destroys the status of this char.
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*/
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rr1 = zs_read_reg(cs, 1);
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c = zs_read_data(cs);
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if (rr1 & (ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) {
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/* Clear the receive error. */
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zs_write_csr(cs, ZSWR0_RESET_ERRORS);
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}
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zsms->zsms_rbuf[put] = (c << 8) | rr1;
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put_next = (put + 1) & ZSMS_RX_RING_MASK;
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/* Would overrun if increment makes (put==get). */
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if (put_next == zsms->zsms_rbget) {
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zsms->zsms_intr_flags |= INTR_RX_OVERRUN;
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} else {
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/* OK, really increment. */
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put = put_next;
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}
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/* Done reading. */
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zsms->zsms_rbput = put;
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/* Ask for softint() call. */
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cs->cs_softreq = 1;
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}
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static void
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zsms_txint(struct zs_chanstate *cs)
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{
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struct zsms_softc *zsms;
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zsms = cs->cs_private;
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zs_write_csr(cs, ZSWR0_RESET_TXINT);
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zsms->zsms_intr_flags |= INTR_TX_EMPTY;
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/* Ask for softint() call. */
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cs->cs_softreq = 1;
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}
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static void
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zsms_stint(struct zs_chanstate *cs, int force)
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{
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struct zsms_softc *zsms;
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int rr0;
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zsms = cs->cs_private;
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rr0 = zs_read_csr(cs);
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zs_write_csr(cs, ZSWR0_RESET_STATUS);
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/*
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* We have to accumulate status line changes here.
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* Otherwise, if we get multiple status interrupts
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* before the softint runs, we could fail to notice
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* some status line changes in the softint routine.
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* Fix from Bill Studenmund, October 1996.
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*/
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cs->cs_rr0_delta |= (cs->cs_rr0 ^ rr0);
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cs->cs_rr0 = rr0;
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zsms->zsms_intr_flags |= INTR_ST_CHECK;
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/* Ask for softint() call. */
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cs->cs_softreq = 1;
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}
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static void
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zsms_softint(struct zs_chanstate *cs)
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{
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struct zsms_softc *zsms;
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int get, c, s;
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int intr_flags;
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u_short ring_data;
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zsms = cs->cs_private;
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/* Atomically get and clear flags. */
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s = splzs();
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intr_flags = zsms->zsms_intr_flags;
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zsms->zsms_intr_flags = 0;
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/* Now lower to spltty for the rest. */
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(void) spltty();
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/*
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* Copy data from the receive ring to the event layer.
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*/
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get = zsms->zsms_rbget;
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while (get != zsms->zsms_rbput) {
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ring_data = zsms->zsms_rbuf[get];
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get = (get + 1) & ZSMS_RX_RING_MASK;
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/* low byte of ring_data is rr1 */
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c = (ring_data >> 8) & 0xff;
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if (ring_data & ZSRR1_DO)
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intr_flags |= INTR_RX_OVERRUN;
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if (ring_data & (ZSRR1_FE | ZSRR1_PE)) {
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log(LOG_ERR, "%s: input error (0x%x)\n",
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zsms->zsms_dev.dv_xname, ring_data);
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c = -1; /* signal input error */
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}
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/* Pass this up to the "middle" layer. */
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zsms_input(zsms, c);
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}
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if (intr_flags & INTR_RX_OVERRUN) {
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log(LOG_ERR, "%s: input overrun\n",
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zsms->zsms_dev.dv_xname);
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}
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zsms->zsms_rbget = get;
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if (intr_flags & INTR_TX_EMPTY) {
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/*
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* Transmit done. (Not expected.)
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*/
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log(LOG_ERR, "%s: transmit interrupt?\n",
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zsms->zsms_dev.dv_xname);
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}
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if (intr_flags & INTR_ST_CHECK) {
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/*
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* Status line change. (Not expected.)
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*/
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log(LOG_ERR, "%s: status interrupt?\n",
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zsms->zsms_dev.dv_xname);
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cs->cs_rr0_delta = 0;
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}
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splx(s);
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}
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static struct zsops zsops_zsms = {
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zsms_rxint, /* receive char available */
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zsms_stint, /* external/status */
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zsms_txint, /* xmit buffer empty */
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zsms_softint, /* process software interrupt */
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};
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