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freebsd/sys/i386/isa/mse.c
1996-09-06 23:09:20 +00:00

595 lines
14 KiB
C

/*
* Copyright 1992 by the University of Guelph
*
* Permission to use, copy and modify this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation.
* University of Guelph makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* $Id: mse.c,v 1.27 1996/06/08 09:37:51 bde Exp $
*/
/*
* Driver for the Logitech and ATI Inport Bus mice for use with 386bsd and
* the X386 port, courtesy of
* Rick Macklem, rick@snowhite.cis.uoguelph.ca
* Caveats: The driver currently uses spltty(), but doesn't use any
* generic tty code. It could use splmse() (that only masks off the
* bus mouse interrupt, but that would require hacking in i386/isa/icu.s.
* (This may be worth the effort, since the Logitech generates 30/60
* interrupts/sec continuously while it is open.)
* NB: The ATI has NOT been tested yet!
*/
/*
* Modification history:
* Sep 6, 1994 -- Lars Fredriksen(fredriks@mcs.com)
* improved probe based on input from Logitech.
*
* Oct 19, 1992 -- E. Stark (stark@cs.sunysb.edu)
* fixes to make it work with Microsoft InPort busmouse
*
* Jan, 1993 -- E. Stark (stark@cs.sunysb.edu)
* added patches for new "select" interface
*
* May 4, 1993 -- E. Stark (stark@cs.sunysb.edu)
* changed position of some spl()'s in mseread
*
* October 8, 1993 -- E. Stark (stark@cs.sunysb.edu)
* limit maximum negative x/y value to -127 to work around XFree problem
* that causes spurious button pushes.
*/
#include "mse.h"
#if NMSE > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>
#include <sys/uio.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#include <machine/clock.h>
#include <i386/isa/isa_device.h>
static int mseprobe(struct isa_device *);
static int mseattach(struct isa_device *);
struct isa_driver msedriver = {
mseprobe, mseattach, "mse"
};
static d_open_t mseopen;
static d_close_t mseclose;
static d_read_t mseread;
static d_select_t mseselect;
#define CDEV_MAJOR 27
static struct cdevsw mse_cdevsw =
{ mseopen, mseclose, mseread, nowrite, /*27*/
noioc, nostop, nullreset, nodevtotty,/* mse */
mseselect, nommap, NULL, "mse", NULL, -1 };
/*
* Software control structure for mouse. The sc_enablemouse(),
* sc_disablemouse() and sc_getmouse() routines must be called spl'd().
*/
#define PROTOBYTES 5
static struct mse_softc {
int sc_flags;
int sc_mousetype;
struct selinfo sc_selp;
u_int sc_port;
void (*sc_enablemouse) __P((u_int port));
void (*sc_disablemouse) __P((u_int port));
void (*sc_getmouse) __P((u_int port, int *dx, int *dy, int *but));
int sc_deltax;
int sc_deltay;
int sc_obuttons;
int sc_buttons;
int sc_bytesread;
u_char sc_bytes[PROTOBYTES];
#ifdef DEVFS
void *devfs_token;
void *n_devfs_token;
#endif
} mse_sc[NMSE];
/* Flags */
#define MSESC_OPEN 0x1
#define MSESC_WANT 0x2
/* and Mouse Types */
#define MSE_LOGITECH 0x1
#define MSE_ATIINPORT 0x2
#define MSE_LOGI_SIG 0xA5
#define MSE_PORTA 0
#define MSE_PORTB 1
#define MSE_PORTC 2
#define MSE_PORTD 3
#define MSE_UNIT(dev) (minor(dev) >> 1)
#define MSE_NBLOCKIO(dev) (minor(dev) & 0x1)
/*
* Logitech bus mouse definitions
*/
#define MSE_SETUP 0x91 /* What does this mean? */
/* The definition for the control port */
/* is as follows: */
/* D7 = Mode set flag (1 = active) */
/* D6,D5 = Mode selection (port A) */
/* 00 = Mode 0 = Basic I/O */
/* 01 = Mode 1 = Strobed I/O */
/* 10 = Mode 2 = Bi-dir bus */
/* D4 = Port A direction (1 = input)*/
/* D3 = Port C (upper 4 bits) */
/* direction. (1 = input) */
/* D2 = Mode selection (port B & C) */
/* 0 = Mode 0 = Basic I/O */
/* 1 = Mode 1 = Strobed I/O */
/* D1 = Port B direction (1 = input)*/
/* D0 = Port C (lower 4 bits) */
/* direction. (1 = input) */
/* So 91 means Basic I/O on all 3 ports,*/
/* Port A is an input port, B is an */
/* output port, C is split with upper */
/* 4 bits being an output port and lower*/
/* 4 bits an input port, and enable the */
/* sucker. */
/* Courtesy Intel 8255 databook. Lars */
#define MSE_HOLD 0x80
#define MSE_RXLOW 0x00
#define MSE_RXHIGH 0x20
#define MSE_RYLOW 0x40
#define MSE_RYHIGH 0x60
#define MSE_DISINTR 0x10
#define MSE_INTREN 0x00
static int mse_probelogi __P((struct isa_device *idp));
static void mse_disablelogi __P((u_int port));
static void mse_getlogi __P((u_int port, int *dx, int *dy, int *but));
static void mse_enablelogi __P((u_int port));
/*
* ATI Inport mouse definitions
*/
#define MSE_INPORT_RESET 0x80
#define MSE_INPORT_STATUS 0x00
#define MSE_INPORT_DX 0x01
#define MSE_INPORT_DY 0x02
#define MSE_INPORT_MODE 0x07
#define MSE_INPORT_HOLD 0x20
#define MSE_INPORT_INTREN 0x09
static int mse_probeati __P((struct isa_device *idp));
static void mse_enableati __P((u_int port));
static void mse_disableati __P((u_int port));
static void mse_getati __P((u_int port, int *dx, int *dy, int *but));
#define MSEPRI (PZERO + 3)
/*
* Table of mouse types.
* Keep the Logitech last, since I haven't figured out how to probe it
* properly yet. (Someday I'll have the documentation.)
*/
static struct mse_types {
int m_type; /* Type of bus mouse */
int (*m_probe) __P((struct isa_device *idp));
/* Probe routine to test for it */
void (*m_enable) __P((u_int port));
/* Start routine */
void (*m_disable) __P((u_int port));
/* Disable interrupts routine */
void (*m_get) __P((u_int port, int *dx, int *dy, int *but));
/* and get mouse status */
} mse_types[] = {
{ MSE_ATIINPORT, mse_probeati, mse_enableati, mse_disableati, mse_getati },
{ MSE_LOGITECH, mse_probelogi, mse_enablelogi, mse_disablelogi, mse_getlogi },
{ 0, },
};
int
mseprobe(idp)
register struct isa_device *idp;
{
register struct mse_softc *sc = &mse_sc[idp->id_unit];
register int i;
/*
* Check for each mouse type in the table.
*/
i = 0;
while (mse_types[i].m_type) {
if ((*mse_types[i].m_probe)(idp)) {
sc->sc_mousetype = mse_types[i].m_type;
sc->sc_enablemouse = mse_types[i].m_enable;
sc->sc_disablemouse = mse_types[i].m_disable;
sc->sc_getmouse = mse_types[i].m_get;
return (1);
}
i++;
}
return (0);
}
int
mseattach(idp)
struct isa_device *idp;
{
int unit = idp->id_unit;
struct mse_softc *sc = &mse_sc[unit];
sc->sc_port = idp->id_iobase;
#ifdef DEVFS
sc->devfs_token =
devfs_add_devswf(&mse_cdevsw, unit << 1, DV_CHR, 0, 0,
0600, "mse%d", unit);
sc->n_devfs_token =
devfs_add_devswf(&mse_cdevsw, (unit<<1)+1, DV_CHR,0, 0,
0600, "nmse%d", unit);
#endif
return (1);
}
/*
* Exclusive open the mouse, initialize it and enable interrupts.
*/
static int
mseopen(dev, flags, fmt, p)
dev_t dev;
int flags;
int fmt;
struct proc *p;
{
register struct mse_softc *sc;
int s;
if (MSE_UNIT(dev) >= NMSE)
return (ENXIO);
sc = &mse_sc[MSE_UNIT(dev)];
if (sc->sc_flags & MSESC_OPEN)
return (EBUSY);
sc->sc_flags |= MSESC_OPEN;
sc->sc_obuttons = sc->sc_buttons = 0x7;
sc->sc_deltax = sc->sc_deltay = 0;
sc->sc_bytesread = PROTOBYTES;
/*
* Initialize mouse interface and enable interrupts.
*/
s = spltty();
(*sc->sc_enablemouse)(sc->sc_port);
splx(s);
return (0);
}
/*
* mseclose: just turn off mouse innterrupts.
*/
static int
mseclose(dev, flags, fmt, p)
dev_t dev;
int flags;
int fmt;
struct proc *p;
{
struct mse_softc *sc = &mse_sc[MSE_UNIT(dev)];
int s;
s = spltty();
(*sc->sc_disablemouse)(sc->sc_port);
sc->sc_flags &= ~MSESC_OPEN;
splx(s);
return(0);
}
/*
* mseread: return mouse info using the MSC serial protocol, but without
* using bytes 4 and 5.
* (Yes this is cheesy, but it makes the X386 server happy, so...)
*/
static int
mseread(dev, uio, ioflag)
dev_t dev;
struct uio *uio;
int ioflag;
{
register struct mse_softc *sc = &mse_sc[MSE_UNIT(dev)];
int xfer, s, error;
/*
* If there are no protocol bytes to be read, set up a new protocol
* packet.
*/
s = spltty(); /* XXX Should be its own spl, but where is imlXX() */
if (sc->sc_bytesread >= PROTOBYTES) {
while (sc->sc_deltax == 0 && sc->sc_deltay == 0 &&
(sc->sc_obuttons ^ sc->sc_buttons) == 0) {
if (MSE_NBLOCKIO(dev)) {
splx(s);
return (0);
}
sc->sc_flags |= MSESC_WANT;
if (error = tsleep((caddr_t)sc, MSEPRI | PCATCH,
"mseread", 0)) {
splx(s);
return (error);
}
}
/*
* Generate protocol bytes.
* For some reason X386 expects 5 bytes but never uses
* the fourth or fifth?
*/
sc->sc_bytes[0] = 0x80 | (sc->sc_buttons & ~0xf8);
if (sc->sc_deltax > 127)
sc->sc_deltax = 127;
if (sc->sc_deltax < -127)
sc->sc_deltax = -127;
sc->sc_deltay = -sc->sc_deltay; /* Otherwise mousey goes wrong way */
if (sc->sc_deltay > 127)
sc->sc_deltay = 127;
if (sc->sc_deltay < -127)
sc->sc_deltay = -127;
sc->sc_bytes[1] = sc->sc_deltax;
sc->sc_bytes[2] = sc->sc_deltay;
sc->sc_bytes[3] = sc->sc_bytes[4] = 0;
sc->sc_obuttons = sc->sc_buttons;
sc->sc_deltax = sc->sc_deltay = 0;
sc->sc_bytesread = 0;
}
splx(s);
xfer = min(uio->uio_resid, PROTOBYTES - sc->sc_bytesread);
if (error = uiomove(&sc->sc_bytes[sc->sc_bytesread], xfer, uio))
return (error);
sc->sc_bytesread += xfer;
return(0);
}
/*
* mseselect: check for mouse input to be processed.
*/
static int
mseselect(dev, rw, p)
dev_t dev;
int rw;
struct proc *p;
{
register struct mse_softc *sc = &mse_sc[MSE_UNIT(dev)];
int s;
s = spltty();
if (sc->sc_bytesread != PROTOBYTES || sc->sc_deltax != 0 ||
sc->sc_deltay != 0 || (sc->sc_obuttons ^ sc->sc_buttons) != 0) {
splx(s);
return (1);
}
/*
* Since this is an exclusive open device, any previous proc.
* pointer is trash now, so we can just assign it.
*/
selrecord(p, &sc->sc_selp);
splx(s);
return (0);
}
/*
* mseintr: update mouse status. sc_deltax and sc_deltay are accumulative.
*/
void
mseintr(unit)
int unit;
{
register struct mse_softc *sc = &mse_sc[unit];
#ifdef DEBUG
static int mse_intrcnt = 0;
if((mse_intrcnt++ % 10000) == 0)
printf("mseintr\n");
#endif /* DEBUG */
if ((sc->sc_flags & MSESC_OPEN) == 0)
return;
(*sc->sc_getmouse)(sc->sc_port, &sc->sc_deltax, &sc->sc_deltay, &sc->sc_buttons);
/*
* If mouse state has changed, wake up anyone wanting to know.
*/
if (sc->sc_deltax != 0 || sc->sc_deltay != 0 ||
(sc->sc_obuttons ^ sc->sc_buttons) != 0) {
if (sc->sc_flags & MSESC_WANT) {
sc->sc_flags &= ~MSESC_WANT;
wakeup((caddr_t)sc);
}
selwakeup(&sc->sc_selp);
}
}
/*
* Routines for the Logitech mouse.
*/
/*
* Test for a Logitech bus mouse and return 1 if it is.
* (until I know how to use the signature port properly, just disable
* interrupts and return 1)
*/
static int
mse_probelogi(idp)
register struct isa_device *idp;
{
int sig;
outb(idp->id_iobase + MSE_PORTD, MSE_SETUP);
/* set the signature port */
outb(idp->id_iobase + MSE_PORTB, MSE_LOGI_SIG);
DELAY(30000); /* 30 ms delay */
sig = inb(idp->id_iobase + MSE_PORTB) & 0xFF;
if (sig == MSE_LOGI_SIG) {
outb(idp->id_iobase + MSE_PORTC, MSE_DISINTR);
return(1);
} else {
if (bootverbose)
printf("mse%d: wrong signature %x\n",idp->id_unit,sig);
return(0);
}
}
/*
* Initialize Logitech mouse and enable interrupts.
*/
static void
mse_enablelogi(port)
register u_int port;
{
int dx, dy, but;
outb(port + MSE_PORTD, MSE_SETUP);
mse_getlogi(port, &dx, &dy, &but);
}
/*
* Disable interrupts for Logitech mouse.
*/
static void
mse_disablelogi(port)
register u_int port;
{
outb(port + MSE_PORTC, MSE_DISINTR);
}
/*
* Get the current dx, dy and button up/down state.
*/
static void
mse_getlogi(port, dx, dy, but)
register u_int port;
int *dx;
int *dy;
int *but;
{
register char x, y;
outb(port + MSE_PORTC, MSE_HOLD | MSE_RXLOW);
x = inb(port + MSE_PORTA);
*but = (x >> 5) & 0x7;
x &= 0xf;
outb(port + MSE_PORTC, MSE_HOLD | MSE_RXHIGH);
x |= (inb(port + MSE_PORTA) << 4);
outb(port + MSE_PORTC, MSE_HOLD | MSE_RYLOW);
y = (inb(port + MSE_PORTA) & 0xf);
outb(port + MSE_PORTC, MSE_HOLD | MSE_RYHIGH);
y |= (inb(port + MSE_PORTA) << 4);
*dx += x;
*dy += y;
outb(port + MSE_PORTC, MSE_INTREN);
}
/*
* Routines for the ATI Inport bus mouse.
*/
/*
* Test for a ATI Inport bus mouse and return 1 if it is.
* (do not enable interrupts)
*/
static int
mse_probeati(idp)
register struct isa_device *idp;
{
int i;
for (i = 0; i < 2; i++)
if (inb(idp->id_iobase + MSE_PORTC) == 0xde)
return (1);
return (0);
}
/*
* Initialize ATI Inport mouse and enable interrupts.
*/
static void
mse_enableati(port)
register u_int port;
{
outb(port + MSE_PORTA, MSE_INPORT_RESET);
outb(port + MSE_PORTA, MSE_INPORT_MODE);
outb(port + MSE_PORTB, MSE_INPORT_INTREN);
}
/*
* Disable interrupts for ATI Inport mouse.
*/
static void
mse_disableati(port)
register u_int port;
{
outb(port + MSE_PORTA, MSE_INPORT_MODE);
outb(port + MSE_PORTB, 0);
}
/*
* Get current dx, dy and up/down button state.
*/
static void
mse_getati(port, dx, dy, but)
register u_int port;
int *dx;
int *dy;
int *but;
{
register char byte;
outb(port + MSE_PORTA, MSE_INPORT_MODE);
outb(port + MSE_PORTB, MSE_INPORT_HOLD);
outb(port + MSE_PORTA, MSE_INPORT_STATUS);
*but = ~(inb(port + MSE_PORTB) & 0x7);
outb(port + MSE_PORTA, MSE_INPORT_DX);
byte = inb(port + MSE_PORTB);
*dx += byte;
outb(port + MSE_PORTA, MSE_INPORT_DY);
byte = inb(port + MSE_PORTB);
*dy += byte;
outb(port + MSE_PORTA, MSE_INPORT_MODE);
outb(port + MSE_PORTB, MSE_INPORT_INTREN);
}
static mse_devsw_installed = 0;
static void mse_drvinit(void *unused)
{
dev_t dev;
if( ! mse_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&mse_cdevsw, NULL);
mse_devsw_installed = 1;
}
}
SYSINIT(msedev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,mse_drvinit,NULL)
#endif /* NMSE */