NetBSD/sys/arch/i386/isa/lms.c

353 lines
7.6 KiB
C

/*-
* Copyright (c) 1993, 1994 Charles Hannum.
* Copyright (c) 1992, 1993 Erik Forsberg.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY ``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 I 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.
*
* $Id: lms.c,v 1.13 1994/05/05 05:36:37 cgd Exp $
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/device.h>
#include <machine/cpu.h>
#include <machine/pio.h>
#include <machine/mouse.h>
#include <i386/isa/isavar.h>
#define LMS_DATA 0 /* offset for data port, read-only */
#define LMS_SIGN 1 /* offset for signature port, read-write */
#define LMS_INTR 2 /* offset for interrupt port, read-only */
#define LMS_CNTRL 2 /* offset for control port, write-only */
#define LMS_CONFIG 3 /* for configuration port, read-write */
#define LMS_NPORTS 4
#define LMS_CHUNK 128 /* chunk size for read */
#define LMS_BSIZE 1020 /* buffer size */
struct lms_softc { /* driver status information */
struct device sc_dev;
struct intrhand sc_ih;
struct clist sc_q;
struct selinfo sc_rsel;
u_short sc_iobase; /* I/O port base */
u_char sc_state; /* mouse driver state */
#define LMS_OPEN 0x01 /* device is open */
#define LMS_ASLP 0x02 /* waiting for mouse data */
u_char sc_status; /* mouse button status */
int sc_x, sc_y; /* accumulated motion in the X,Y axis */
};
int lmsprobe();
void lmsattach();
int lmsintr __P((struct lms_softc *));
struct cfdriver lmscd = {
NULL, "lms", lmsprobe, lmsattach, DV_TTY, sizeof(struct lms_softc)
};
#define LMSUNIT(dev) (minor(dev))
int
lmsprobe(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct isa_attach_args *ia = aux;
u_short iobase = ia->ia_iobase;
/* Configure and check for port present. */
outb(iobase + LMS_CONFIG, 0x91);
delay(10);
outb(iobase + LMS_SIGN, 0x0c);
delay(10);
if (inb(iobase + LMS_SIGN) != 0x0c)
return 0;
outb(iobase + LMS_SIGN, 0x50);
delay(10);
if (inb(iobase + LMS_SIGN) != 0x50)
return 0;
/* Disable interrupts. */
outb(iobase + LMS_CNTRL, 0x10);
ia->ia_iosize = LMS_NPORTS;
ia->ia_msize = 0;
return 1;
}
void
lmsattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct lms_softc *sc = (void *)self;
struct isa_attach_args *ia = aux;
u_short iobase = ia->ia_iobase;
printf("\n");
/* Other initialization was done by lmsprobe. */
sc->sc_iobase = iobase;
sc->sc_state = 0;
sc->sc_ih.ih_fun = lmsintr;
sc->sc_ih.ih_arg = sc;
sc->sc_ih.ih_level = IPL_NONE;
intr_establish(ia->ia_irq, &sc->sc_ih);
}
int
lmsopen(dev, flag)
dev_t dev;
int flag;
{
int unit = LMSUNIT(dev);
struct lms_softc *sc;
if (unit >= lmscd.cd_ndevs)
return ENXIO;
sc = lmscd.cd_devs[unit];
if (!sc)
return ENXIO;
if (sc->sc_state & LMS_OPEN)
return EBUSY;
if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1)
return ENOMEM;
sc->sc_state |= LMS_OPEN;
sc->sc_status = 0;
sc->sc_x = sc->sc_y = 0;
/* Enable interrupts. */
outb(sc->sc_iobase + LMS_CNTRL, 0);
return 0;
}
int
lmsclose(dev, flag)
dev_t dev;
int flag;
{
struct lms_softc *sc = lmscd.cd_devs[LMSUNIT(dev)];
/* Disable interrupts. */
outb(sc->sc_iobase + LMS_CNTRL, 0x10);
sc->sc_state &= ~LMS_OPEN;
clfree(&sc->sc_q);
return 0;
}
int
lmsread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct lms_softc *sc = lmscd.cd_devs[LMSUNIT(dev)];
int s;
int error;
size_t length;
u_char buffer[LMS_CHUNK];
/* Block until mouse activity occured. */
s = spltty();
while (sc->sc_q.c_cc == 0) {
if (flag & IO_NDELAY) {
splx(s);
return EWOULDBLOCK;
}
sc->sc_state |= LMS_ASLP;
if (error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0)) {
sc->sc_state &= ~LMS_ASLP;
splx(s);
return error;
}
}
splx(s);
/* Transfer as many chunks as possible. */
while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) {
length = min(sc->sc_q.c_cc, uio->uio_resid);
if (length > sizeof(buffer))
length = sizeof(buffer);
/* Remove a small chunk from the input queue. */
(void) q_to_b(&sc->sc_q, buffer, length);
/* Copy the data to the user process. */
if (error = uiomove(buffer, length, uio))
break;
}
return error;
}
int
lmsioctl(dev, cmd, addr, flag)
dev_t dev;
int cmd;
caddr_t addr;
int flag;
{
struct lms_softc *sc = lmscd.cd_devs[LMSUNIT(dev)];
struct mouseinfo info;
int s;
int error;
switch (cmd) {
case MOUSEIOCREAD:
s = spltty();
info.status = sc->sc_status;
if (sc->sc_x || sc->sc_y)
info.status |= MOVEMENT;
if (sc->sc_x > 127)
info.xmotion = 127;
else if (sc->sc_x < -127)
/* Bounding at -127 avoids a bug in XFree86. */
info.xmotion = -127;
else
info.xmotion = sc->sc_x;
if (sc->sc_y > 127)
info.ymotion = 127;
else if (sc->sc_y < -127)
info.ymotion = -127;
else
info.ymotion = sc->sc_y;
/* Reset historical information. */
sc->sc_x = sc->sc_y = 0;
sc->sc_status &= ~BUTCHNGMASK;
ndflush(&sc->sc_q, sc->sc_q.c_cc);
splx(s);
error = copyout(&info, addr, sizeof(struct mouseinfo));
break;
default:
error = EINVAL;
break;
}
return error;
}
int
lmsintr(sc)
struct lms_softc *sc;
{
u_short iobase = sc->sc_iobase;
u_char hi, lo, buttons, changed;
char dx, dy;
u_char buffer[5];
if ((sc->sc_state & LMS_OPEN) == 0)
/* Interrupts are not expected. */
return 0;
outb(iobase + LMS_CNTRL, 0xab);
hi = inb(iobase + LMS_DATA);
outb(iobase + LMS_CNTRL, 0x90);
lo = inb(iobase + LMS_DATA);
dx = ((hi & 0x0f) << 4) | (lo & 0x0f);
/* Bounding at -127 avoids a bug in XFree86. */
dx = (dx == -128) ? -127 : dx;
outb(iobase + LMS_CNTRL, 0xf0);
hi = inb(iobase + LMS_DATA);
outb(iobase + LMS_CNTRL, 0xd0);
lo = inb(iobase + LMS_DATA);
dy = ((hi & 0x0f) << 4) | (lo & 0x0f);
dy = (dy == -128) ? 127 : -dy;
outb(iobase + LMS_CNTRL, 0);
buttons = (~hi >> 5) & 0x07;
changed = ((buttons ^ sc->sc_status) & 0x07) << 3;
sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed;
if (dx || dy || changed) {
/* Update accumulated movements. */
sc->sc_x += dx;
sc->sc_y += dy;
/* Add this event to the queue. */
buffer[0] = 0x80 | (buttons ^ BUTSTATMASK);
buffer[1] = dx;
buffer[2] = dy;
buffer[3] = buffer[4] = 0;
(void) b_to_q(buffer, sizeof buffer, &sc->sc_q);
if (sc->sc_state & LMS_ASLP) {
sc->sc_state &= ~LMS_ASLP;
wakeup((caddr_t)sc);
}
selwakeup(&sc->sc_rsel);
}
return -1;
}
int
lmsselect(dev, rw, p)
dev_t dev;
int rw;
struct proc *p;
{
struct lms_softc *sc = lmscd.cd_devs[LMSUNIT(dev)];
int s;
int ret;
if (rw == FWRITE)
return 0;
s = spltty();
if (!sc->sc_q.c_cc) {
selrecord(p, &sc->sc_rsel);
ret = 0;
} else
ret = 1;
splx(s);
return ret;
}