NetBSD/sys/dev/ic/spic.c

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/* $NetBSD: spic.c,v 1.1 2002/04/22 12:42:11 augustss Exp $ */
/*
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson (lennart@augustsson.net) at
* Carlstedt Research & Technology.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* The SPIC is used on some Sony Vaios to handle the jog dial and other
* peripherals.
* The protocol used by the SPIC seems to vary wildly among the different
* models, and I've found no documentation.
* This file handles the jog dial on the SRX77 model, and perhaps nothing
* else.
*
* The general way of talking to the SPIC was gleaned from the Linux and
* FreeBSD drivers. The hex numbers were taken from these drivers (they
* come from reverese engineering.)
*
* TODO:
* Make it handle more models.
* Figure out why the interrupt mode doesn't work.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: spic.c,v 1.1 2002/04/22 12:42:11 augustss Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/callout.h>
#include <machine/bus.h>
#include <dev/ic/spicvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsmousevar.h>
#define POLLRATE (hz/30)
/* Some hardware constants */
#define SPIC_PORT1 0
#define SPIC_PORT2 4
#ifdef SPIC_DEBUG
int spicdebug = 0;
#endif
static int spic_enable(void *);
static void spic_disable(void *);
static int spic_ioctl(void *, u_long, caddr_t, int, struct proc *);
static const struct wsmouse_accessops spic_accessops = {
spic_enable,
spic_ioctl,
spic_disable,
};
#define SPIC_COMMAND(quiet, command) do { \
unsigned int n = 10000; \
while (--n && (command)) \
delay(1); \
if (n == 0 && !(quiet)) \
printf("spic: command failed at line %d\n", __LINE__); \
} while (0)
#if 0
#define INB(sc, p) (delay(100), printf("inb(%x)=%x\n", (uint)sc->sc_ioh+p, bus_space_read_1(sc->sc_iot, sc->sc_ioh, p)), delay(100), bus_space_read_1(sc->sc_iot, sc->sc_ioh, (p)))
#define OUTB(sc, v, p) do { delay(100); bus_space_write_1(sc->sc_iot, sc->sc_ioh, (p), (v)); printf("outb(%x, %x)\n", (uint)sc->sc_ioh+p, v); } while(0)
#else
#define INB(sc, p) (delay(100), bus_space_read_1(sc->sc_iot, sc->sc_ioh, (p)))
#define OUTB(sc, v, p) do { delay(100); bus_space_write_1(sc->sc_iot, sc->sc_ioh, (p), (v)); } while(0)
#endif
static u_int8_t
spic_call1(struct spic_softc *sc, u_int8_t dev)
{
u_int8_t v1, v2;
SPIC_COMMAND(0, INB(sc, SPIC_PORT2) & 2);
OUTB(sc, dev, SPIC_PORT2);
v1 = INB(sc, SPIC_PORT2);
v2 = INB(sc, SPIC_PORT1);
return v2;
}
static u_int8_t
spic_call2(struct spic_softc *sc, u_int8_t dev, u_int8_t fn)
{
u_int8_t v1;
SPIC_COMMAND(0, INB(sc, SPIC_PORT2) & 2);
OUTB(sc, dev, SPIC_PORT2);
SPIC_COMMAND(0, INB(sc, SPIC_PORT2) & 2);
OUTB(sc, fn, SPIC_PORT1);
v1 = INB(sc, SPIC_PORT1);
return v1;
}
/* Interrupt handler: some event is available */
int
spic_intr(void *v) {
struct spic_softc *sc = v;
u_int8_t v1, v2;
int dz, buttons;
v1 = INB(sc, SPIC_PORT1);
v2 = INB(sc, SPIC_PORT2);
buttons = 0;
if (v1 & 0x40)
buttons |= 1 << 1;
if (v1 & 0x20)
buttons |= 1 << 5;
dz = v1 & 0x1f;
switch (dz) {
case 0:
case 1:
case 2:
case 3:
break;
case 0x1f:
case 0x1e:
case 0x1d:
dz -= 0x20;
break;
default:
printf("spic: v1=0x%02x v2=0x%02x\n", v1, v2);
goto skip;
}
if (!sc->sc_enabled) {
/*printf("spic: not enabled\n");*/
goto skip;
}
if (dz != 0 || buttons != sc->sc_buttons) {
#ifdef SPIC_DEBUG
if (spicdebug)
printf("spic: but=0x%x dz=%d v1=0x%02x v2=0x%02x\n",
buttons, dz, v1, v2);
#endif
sc->sc_buttons = buttons;
if (sc->sc_wsmousedev != NULL) {
wsmouse_input(sc->sc_wsmousedev, buttons, 0, 0, dz,
WSMOUSE_INPUT_DELTA);
}
}
skip:
spic_call2(sc, 0x81, 0xff); /* Clear event */
return (1);
}
static void
spictimeout(void *v)
{
struct spic_softc *sc = v;
int s = spltty();
spic_intr(v);
splx(s);
callout_reset(&sc->sc_poll, POLLRATE, spictimeout, sc);
}
void
spic_attach(struct spic_softc *sc)
{
struct wsmousedev_attach_args a;
#ifdef SPIC_DEBUG
if (spicdebug)
printf("spic_attach %x %x\n", sc->sc_iot, (uint)sc->sc_ioh);
#endif
callout_init(&sc->sc_poll);
spic_call1(sc, 0x82);
spic_call2(sc, 0x81, 0xff);
spic_call1(sc, 0x92); /* or 0x82 */
a.accessops = &spic_accessops;
a.accesscookie = sc;
sc->sc_wsmousedev = config_found(&sc->sc_dev, &a, wsmousedevprint);
}
static int
spic_enable(void *v)
{
struct spic_softc *sc = v;
if (sc->sc_enabled)
return (EBUSY);
sc->sc_enabled = 1;
sc->sc_buttons = 0;
#ifdef SPIC_DEBUG
if (spicdebug)
printf("spic_enable\n");
#endif
callout_reset(&sc->sc_poll, POLLRATE, spictimeout, sc);
return (0);
}
static void
spic_disable(void *v)
{
struct spic_softc *sc = v;
#ifdef DIAGNOSTIC
if (!sc->sc_enabled) {
printf("spic_disable: not enabled\n");
return;
}
#endif
callout_stop(&sc->sc_poll);
sc->sc_enabled = 0;
#ifdef SPIC_DEBUG
if (spicdebug)
printf("spic_disable\n");
#endif
}
static int
spic_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
{
switch (cmd) {
case WSMOUSEIO_GTYPE:
/* XXX this is not really correct */
*(u_int *)data = WSMOUSE_TYPE_PS2;
return (0);
}
return (-1);
}