initial import of NetBSD tree

1 files changed, 451 insertions, 0 deletions

diff --git a/sys/arch/i386/isa/pms.c b/sys/arch/i386/isa/pms.c
new file mode 100644
index 00000000000..8098b473968
--- /dev/null
+++ b/sys/arch/i386/isa/pms.c
@@ -0,0 +1,451 @@
+/*	$NetBSD: pms.c,v 1.23 1995/10/05 22:06:54 mycroft Exp $	*/
+
+/*-
+ * Copyright (c) 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.
+ */
+
+/*
+ * XXXX
+ * This is a hack.  This driver should really be combined with the
+ * keyboard driver, since they go through the same buffer and use the
+ * same I/O ports.  Frobbing the mouse and keyboard at the same time
+ * may result in dropped characters and/or corrupted mouse events.
+ */
+
+#include "pms.h"
+#if NPMS > 1
+#error Only one PS/2 style mouse may be configured into your system.
+#endif
+
+#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	PMS_DATA	0x60	/* offset for data port, read-write */
+#define	PMS_CNTRL	0x64	/* offset for control port, write-only */
+#define	PMS_STATUS	0x64	/* offset for status port, read-only */
+#define	PMS_NPORTS	8
+
+/* status bits */
+#define	PMS_OBUF_FULL	0x01
+#define	PMS_IBUF_FULL	0x02
+
+/* controller commands */
+#define	PMS_INT_ENABLE	0x47	/* enable controller interrupts */
+#define	PMS_INT_DISABLE	0x65	/* disable controller interrupts */
+#define	PMS_AUX_ENABLE	0xa8	/* enable auxiliary port */
+#define	PMS_AUX_DISABLE	0xa7	/* disable auxiliary port */
+#define	PMS_AUX_TEST	0xa9	/* test auxiliary port */
+
+#define	PMS_8042_CMD	0x65
+
+/* mouse commands */
+#define	PMS_SET_SCALE11	0xe6	/* set scaling 1:1 */
+#define	PMS_SET_SCALE21 0xe7	/* set scaling 2:1 */
+#define	PMS_SET_RES	0xe8	/* set resolution */
+#define	PMS_GET_SCALE	0xe9	/* get scaling factor */
+#define	PMS_SET_STREAM	0xea	/* set streaming mode */
+#define	PMS_SET_SAMPLE	0xf3	/* set sampling rate */
+#define	PMS_DEV_ENABLE	0xf4	/* mouse on */
+#define	PMS_DEV_DISABLE	0xf5	/* mouse off */
+#define	PMS_RESET	0xff	/* reset */
+
+#define	PMS_CHUNK	128	/* chunk size for read */
+#define	PMS_BSIZE	1020	/* buffer size */
+
+struct pms_softc {		/* driver status information */
+	struct device sc_dev;
+	void *sc_ih;
+
+	struct clist sc_q;
+	struct selinfo sc_rsel;
+	u_char sc_state;	/* mouse driver state */
+#define	PMS_OPEN	0x01	/* device is open */
+#define	PMS_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 pmsprobe __P((struct device *, void *, void *));
+void pmsattach __P((struct device *, struct device *, void *));
+int pmsintr __P((void *));
+
+struct cfdriver pmscd = {
+	NULL, "pms", pmsprobe, pmsattach, DV_TTY, sizeof(struct pms_softc)
+};
+
+#define	PMSUNIT(dev)	(minor(dev))
+
+static inline void
+pms_flush()
+{
+	u_char c;
+
+	while (c = inb(PMS_STATUS) & 0x03)
+		if ((c & PMS_OBUF_FULL) == PMS_OBUF_FULL) {
+			/* XXX - delay is needed to prevent some keyboards from
+			   wedging when the system boots */
+			delay(6);
+			(void) inb(PMS_DATA);
+		}
+}
+
+static inline void
+pms_dev_cmd(value)
+	u_char value;
+{
+
+	pms_flush();
+	outb(PMS_CNTRL, 0xd4);
+	pms_flush();
+	outb(PMS_DATA, value);
+}
+
+static inline void
+pms_aux_cmd(value)
+	u_char value;
+{
+
+	pms_flush();
+	outb(PMS_CNTRL, value);
+}
+
+static inline void
+pms_pit_cmd(value)
+	u_char value;
+{
+
+	pms_flush();
+	outb(PMS_CNTRL, 0x60);
+	pms_flush();
+	outb(PMS_DATA, value);
+}
+
+int
+pmsprobe(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct isa_attach_args *ia = aux;
+	u_char x;
+
+	if (ia->ia_iobase != 0x60)
+		return 0;
+
+	pms_dev_cmd(PMS_RESET);
+	pms_aux_cmd(PMS_AUX_TEST);
+	delay(1000);
+	x = inb(PMS_DATA);
+	pms_pit_cmd(PMS_INT_DISABLE);
+	if (x & 0x04)
+		return 0;
+
+	ia->ia_iosize = PMS_NPORTS;
+	ia->ia_msize = 0;
+	return 1;
+}
+
+void
+pmsattach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct pms_softc *sc = (void *)self;
+	struct isa_attach_args *ia = aux;
+
+	printf("\n");
+
+	/* Other initialization was done by pmsprobe. */
+	sc->sc_state = 0;
+
+	sc->sc_ih = isa_intr_establish(ia->ia_irq, ISA_IST_EDGE, ISA_IPL_TTY,
+	    pmsintr, sc);
+}
+
+int
+pmsopen(dev, flag)
+	dev_t dev;
+	int flag;
+{
+	int unit = PMSUNIT(dev);
+	struct pms_softc *sc;
+
+	if (unit >= pmscd.cd_ndevs)
+		return ENXIO;
+	sc = pmscd.cd_devs[unit];
+	if (!sc)
+		return ENXIO;
+
+	if (sc->sc_state & PMS_OPEN)
+		return EBUSY;
+
+	if (clalloc(&sc->sc_q, PMS_BSIZE, 0) == -1)
+		return ENOMEM;
+
+	sc->sc_state |= PMS_OPEN;
+	sc->sc_status = 0;
+	sc->sc_x = sc->sc_y = 0;
+
+	/* Enable interrupts. */
+	pms_dev_cmd(PMS_DEV_ENABLE);
+	pms_aux_cmd(PMS_AUX_ENABLE);
+#if 0
+	pms_dev_cmd(PMS_SET_RES);
+	pms_dev_cmd(3);		/* 8 counts/mm */
+	pms_dev_cmd(PMS_SET_SCALE21);
+	pms_dev_cmd(PMS_SET_SAMPLE);
+	pms_dev_cmd(100);	/* 100 samples/sec */
+	pms_dev_cmd(PMS_SET_STREAM);
+#endif
+	pms_pit_cmd(PMS_INT_ENABLE);
+
+	return 0;
+}
+
+int
+pmsclose(dev, flag)
+	dev_t dev;
+	int flag;
+{
+	struct pms_softc *sc = pmscd.cd_devs[PMSUNIT(dev)];
+
+	/* Disable interrupts. */
+	pms_dev_cmd(PMS_DEV_DISABLE);
+	pms_pit_cmd(PMS_INT_DISABLE);
+	pms_aux_cmd(PMS_AUX_DISABLE);
+
+	sc->sc_state &= ~PMS_OPEN;
+
+	clfree(&sc->sc_q);
+
+	return 0;
+}
+
+int
+pmsread(dev, uio, flag)
+	dev_t dev;
+	struct uio *uio;
+	int flag;
+{
+	struct pms_softc *sc = pmscd.cd_devs[PMSUNIT(dev)];
+	int s;
+	int error;
+	size_t length;
+	u_char buffer[PMS_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 |= PMS_ASLP;
+		if (error = tsleep((caddr_t)sc, PZERO | PCATCH, "pmsrea", 0)) {
+			sc->sc_state &= ~PMS_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
+pmsioctl(dev, cmd, addr, flag)
+	dev_t dev;
+	u_long cmd;
+	caddr_t addr;
+	int flag;
+{
+	struct pms_softc *sc = pmscd.cd_devs[PMSUNIT(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;
+}
+
+/* Masks for the first byte of a packet */
+#define PS2LBUTMASK 0x01
+#define PS2RBUTMASK 0x02
+#define PS2MBUTMASK 0x04
+
+int
+pmsintr(arg)
+	void *arg;
+{
+	struct pms_softc *sc = arg;
+	static int state = 0;
+	static u_char buttons;
+	u_char changed;
+	static char dx, dy;
+	u_char buffer[5];
+
+	if ((sc->sc_state & PMS_OPEN) == 0) {
+		/* Interrupts are not expected.  Discard the byte. */
+		pms_flush();
+		return 0;
+	}
+
+	switch (state) {
+
+	case 0:
+		buttons = inb(PMS_DATA);
+		if ((buttons & 0xc0) == 0)
+			++state;
+		break;
+
+	case 1:
+		dx = inb(PMS_DATA);
+		/* Bounding at -127 avoids a bug in XFree86. */
+		dx = (dx == -128) ? -127 : dx;
+		++state;
+		break;
+
+	case 2:
+		dy = inb(PMS_DATA);
+		dy = (dy == -128) ? -127 : dy;
+		state = 0;
+
+		buttons = ((buttons & PS2LBUTMASK) << 2) |
+			  ((buttons & (PS2RBUTMASK | PS2MBUTMASK)) >> 1);
+		changed = ((buttons ^ sc->sc_status) & BUTSTATMASK) << 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 & PMS_ASLP) {
+				sc->sc_state &= ~PMS_ASLP;
+				wakeup((caddr_t)sc);
+			}
+			selwakeup(&sc->sc_rsel);
+		}
+
+		break;
+	}
+
+	return -1;
+}
+
+int
+pmsselect(dev, rw, p)
+	dev_t dev;
+	int rw;
+	struct proc *p;
+{
+	struct pms_softc *sc = pmscd.cd_devs[PMSUNIT(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;
+}