initial import of NetBSD tree

1 files changed, 346 insertions, 0 deletions

diff --git a/sys/arch/i386/isa/mms.c b/sys/arch/i386/isa/mms.c
new file mode 100644
index 00000000000..9081d199a82
--- /dev/null
+++ b/sys/arch/i386/isa/mms.c
@@ -0,0 +1,346 @@
+/*	$NetBSD: mms.c,v 1.19 1995/10/05 22:06:51 mycroft Exp $	*/
+
+/*-
+ * 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.
+ */
+
+#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 <dev/isa/isavar.h>
+
+#define	MMS_ADDR	0	/* offset for register select */
+#define	MMS_DATA	1	/* offset for InPort data */
+#define	MMS_IDENT	2	/* offset for identification register */
+#define	MMS_NPORTS	4
+
+#define	MMS_CHUNK	128	/* chunk size for read */
+#define	MMS_BSIZE	1020	/* buffer size */
+
+struct mms_softc {		/* driver status information */
+	struct device sc_dev;
+	void *sc_ih;
+
+	struct clist sc_q;
+	struct selinfo sc_rsel;
+	int sc_iobase;		/* I/O port base */
+	u_char sc_state;	/* mouse driver state */
+#define	MMS_OPEN	0x01	/* device is open */
+#define	MMS_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 mmsprobe __P((struct device *, void *, void *));
+void mmsattach __P((struct device *, struct device *, void *));
+int mmsintr __P((void *));
+
+struct cfdriver mmscd = {
+	NULL, "mms", mmsprobe, mmsattach, DV_TTY, sizeof(struct mms_softc)
+};
+
+#define	MMSUNIT(dev)	(minor(dev))
+
+int
+mmsprobe(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct isa_attach_args *ia = aux;
+	int iobase = ia->ia_iobase;
+
+	/* Read identification register to see if present */
+	if (inb(iobase + MMS_IDENT) != 0xde)
+		return 0;
+
+	/* Seems it was there; reset. */
+	outb(iobase + MMS_ADDR, 0x87);
+
+	ia->ia_iosize = MMS_NPORTS;
+	ia->ia_msize = 0;
+	return 1;
+}
+
+void
+mmsattach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct mms_softc *sc = (void *)self;
+	struct isa_attach_args *ia = aux;
+	int iobase = ia->ia_iobase;
+
+	printf("\n");
+
+	/* Other initialization was done by mmsprobe. */
+	sc->sc_iobase = iobase;
+	sc->sc_state = 0;
+
+	sc->sc_ih = isa_intr_establish(ia->ia_irq, ISA_IST_PULSE, ISA_IPL_TTY,
+	    mmsintr, sc);
+}
+
+int
+mmsopen(dev, flag)
+	dev_t dev;
+	int flag;
+{
+	int unit = MMSUNIT(dev);
+	struct mms_softc *sc;
+
+	if (unit >= mmscd.cd_ndevs)
+		return ENXIO;
+	sc = mmscd.cd_devs[unit];
+	if (!sc)
+		return ENXIO;
+
+	if (sc->sc_state & MMS_OPEN)
+		return EBUSY;
+
+	if (clalloc(&sc->sc_q, MMS_BSIZE, 0) == -1)
+		return ENOMEM;
+
+	sc->sc_state |= MMS_OPEN;
+	sc->sc_status = 0;
+	sc->sc_x = sc->sc_y = 0;
+
+	/* Enable interrupts. */
+	outb(sc->sc_iobase + MMS_ADDR, 0x07);
+	outb(sc->sc_iobase + MMS_DATA, 0x09);
+
+	return 0;
+}
+
+int
+mmsclose(dev, flag)
+	dev_t dev;
+	int flag;
+{
+	struct mms_softc *sc = mmscd.cd_devs[MMSUNIT(dev)];
+
+	/* Disable interrupts. */
+	outb(sc->sc_iobase + MMS_ADDR, 0x87);
+
+	sc->sc_state &= ~MMS_OPEN;
+
+	clfree(&sc->sc_q);
+
+	return 0;
+}
+
+int
+mmsread(dev, uio, flag)
+	dev_t dev;
+	struct uio *uio;
+	int flag;
+{
+	struct mms_softc *sc = mmscd.cd_devs[MMSUNIT(dev)];
+	int s;
+	int error;
+	size_t length;
+	u_char buffer[MMS_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 |= MMS_ASLP;
+		if (error = tsleep((caddr_t)sc, PZERO | PCATCH, "mmsrea", 0)) {
+			sc->sc_state &= ~MMS_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
+mmsioctl(dev, cmd, addr, flag)
+	dev_t dev;
+	u_long cmd;
+	caddr_t addr;
+	int flag;
+{
+	struct mms_softc *sc = mmscd.cd_devs[MMSUNIT(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
+mmsintr(arg)
+	void *arg;
+{
+	struct mms_softc *sc = arg;
+	int iobase = sc->sc_iobase;
+	u_char buttons, changed, status;
+	char dx, dy;
+	u_char buffer[5];
+
+	if ((sc->sc_state & MMS_OPEN) == 0)
+		/* Interrupts are not expected. */
+		return 0;
+
+	/* Freeze InPort registers (disabling interrupts). */
+	outb(iobase + MMS_ADDR, 0x07);
+	outb(iobase + MMS_DATA, 0x29);
+
+	outb(iobase + MMS_ADDR, 0x00);
+	status = inb(iobase + MMS_DATA);
+
+	if (status & 0x40) {
+		outb(iobase + MMS_ADDR, 1);
+		dx = inb(iobase + MMS_DATA);
+		dx = (dx == -128) ? -127 : dx;
+		outb(iobase + MMS_ADDR, 2);
+		dy = inb(iobase + MMS_DATA);
+		dy = (dy == -128) ? 127 : -dy;
+	} else
+		dx = dy = 0;
+
+	/* Unfreeze InPort registers (reenabling interrupts). */
+	outb(iobase + MMS_ADDR, 0x07);
+	outb(iobase + MMS_DATA, 0x09);
+
+	buttons = status & BUTSTATMASK;
+	changed = status & BUTCHNGMASK;
+	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 & MMS_ASLP) {
+			sc->sc_state &= ~MMS_ASLP;
+			wakeup((caddr_t)sc);
+		}
+		selwakeup(&sc->sc_rsel);
+	}
+
+	return -1;
+}
+
+int
+mmsselect(dev, rw, p)
+	dev_t dev;
+	int rw;
+	struct proc *p;
+{
+	struct mms_softc *sc = mmscd.cd_devs[MMSUNIT(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;
+}