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

689 lines
14 KiB
C

/* $NetBSD: pms.c,v 1.48 2001/09/16 16:34:30 wiz Exp $ */
/*-
* Copyright (c) 1994, 1997 Charles M. 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 "opms.h"
#if (NOPMS_HACK + NOPMS_PCKBC) > 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 <sys/poll.h>
#if (NOPMS_HACK > 0)
#include <machine/cpu.h>
#include <machine/intr.h>
#include <machine/pio.h>
#endif
#if (NOPMS_PCKBC > 0)
#include <machine/bus.h>
#include <dev/ic/pckbcvar.h>
#endif
#include <machine/mouse.h>
#include <machine/conf.h>
#if (NOPMS_HACK > 0)
#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 0x45 /* 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 */
#endif /* NOPMS_HACK > 0 */
/* 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 opms_softc { /* driver status information */
struct device sc_dev;
#if (NOPMS_HACK > 0)
void *sc_ih;
#endif
#if (NOPMS_PCKBC > 0)
pckbc_tag_t sc_kbctag;
pckbc_slot_t sc_kbcslot;
#endif
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 */
};
#if (NOPMS_HACK > 0)
int opms_hack_probe __P((struct device *, struct cfdata *, void *));
void opms_hack_attach __P((struct device *, struct device *, void *));
int opmsintr __P((void *));
struct cfattach opms_hack_ca = {
sizeof(struct opms_softc), opms_hack_probe, opms_hack_attach,
};
#endif
#if (NOPMS_PCKBC > 0)
int opms_pckbc_probe __P((struct device *, struct cfdata *, void *));
void opms_pckbc_attach __P((struct device *, struct device *, void *));
struct cfattach opms_pckbc_ca = {
sizeof(struct opms_softc), opms_pckbc_probe, opms_pckbc_attach,
};
#endif
void opmsinput __P((void *, int));
extern struct cfdriver opms_cd;
#define PMSUNIT(dev) (minor(dev))
#if (NOPMS_HACK > 0)
static __inline int pms_wait_output __P((void));
static __inline int pms_wait_input __P((void));
static __inline void pms_flush_input __P((void));
static __inline void pms_dev_cmd __P((u_char));
static __inline void pms_pit_cmd __P((u_char));
static __inline void pms_aux_cmd __P((u_char));
#define PMS_DELAY \
{ u_char x = inb(0x84); (void) x; } \
{ u_char x = inb(0x84); (void) x; } \
{ u_char x = inb(0x84); (void) x; } \
{ u_char x = inb(0x84); (void) x; } \
{ u_char x = inb(0x84); (void) x; } \
{ u_char x = inb(0x84); (void) x; }
static __inline int
pms_wait_output()
{
u_int i;
for (i = 100000; i; i--)
if ((inb(PMS_STATUS) & PMS_IBUF_FULL) == 0) {
PMS_DELAY;
return (1);
}
return (0);
}
static __inline int
pms_wait_input()
{
u_int i;
for (i = 100000; i; i--)
if ((inb(PMS_STATUS) & PMS_OBUF_FULL) != 0) {
PMS_DELAY;
return (1);
}
return (0);
}
static __inline void
pms_flush_input()
{
u_int i;
pms_wait_output();
delay(10000);
for (i = 10; i; i--) {
if ((inb(PMS_STATUS) & PMS_OBUF_FULL) == 0)
return;
PMS_DELAY;
(void) inb(PMS_DATA);
}
}
static __inline void
pms_dev_cmd(value)
u_char value;
{
int s;
s = spltty();
pms_wait_output();
outb(PMS_CNTRL, 0xd4);
pms_wait_output();
outb(PMS_DATA, value);
splx(s);
}
static __inline void
pms_aux_cmd(value)
u_char value;
{
int s;
s = spltty();
pms_wait_output();
outb(PMS_CNTRL, value);
splx(s);
}
static __inline void
pms_pit_cmd(value)
u_char value;
{
int s;
s = spltty();
pms_wait_output();
outb(PMS_CNTRL, 0x60);
pms_wait_output();
outb(PMS_DATA, value);
splx(s);
}
/*
* XXX needs more work yet. We should have a `pckbd_attach_args' that
* provides the parent's io port and our irq.
*/
int
opms_hack_probe(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
u_char x;
/*
* We only attach to the keyboard controller via
* the console drivers. (We really wish we could be the
* child of a real keyboard controller driver.)
*/
if ((parent == NULL) ||
((strcmp(parent->dv_cfdata->cf_driver->cd_name, "pc") != 0) &&
(strcmp(parent->dv_cfdata->cf_driver->cd_name, "vt") != 0)))
return (0);
/* Can't wildcard IRQ. */
if (cf->cf_loc[PCKBCPORTCF_IRQ] == PCKBCPORTCF_IRQ_DEFAULT)
return (0);
pms_flush_input();
#if 0
pms_dev_cmd(PMS_RESET);
if (!pms_wait_input())
return 0;
x = inb(PMS_DATA);
#endif
pms_aux_cmd(PMS_AUX_TEST);
if (!pms_wait_input())
return 0;
x = inb(PMS_DATA);
pms_pit_cmd(PMS_INT_DISABLE);
if (x & 0x04)
return 0;
return 1;
}
void
opms_hack_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct opms_softc *sc = (void *)self;
int irq = self->dv_cfdata->cf_loc[PCKBCPORTCF_IRQ];
isa_chipset_tag_t ic = aux; /* XXX */
printf(" irq %d\n", irq);
/* Other initialization was done by pmsprobe. */
sc->sc_state = 0;
sc->sc_ih = isa_intr_establish(ic, irq, IST_EDGE, IPL_TTY,
opmsintr, sc);
}
#endif /* NOPMS_HACK > 0 */
#if (NOPMS_PCKBC > 0)
int
opms_pckbc_probe(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct pckbc_attach_args *pa = aux;
u_char cmd[1], resp[2];
int res;
if (pa->pa_slot != PCKBC_AUX_SLOT)
return (0);
/* Flush any garbage. */
pckbc_flush(pa->pa_tag, pa->pa_slot);
/* reset the device */
cmd[0] = PMS_RESET;
res = pckbc_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 2, resp, 1);
if (res) {
#ifdef DEBUG
printf("opmsprobe: reset error\n");
#endif
return (0);
}
if (resp[0] != 0xaa) {
printf("opmsprobe: reset response 0x%x\n", resp[0]);
return (0);
}
/* get type number (0 = mouse) */
if (resp[1] != 0) {
#ifdef DEBUG
printf("opmsprobe: type 0x%x\n", resp[1]);
#endif
return (0);
}
return (1);
}
void
opms_pckbc_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct opms_softc *sc = (void *)self;
struct pckbc_attach_args *pa = aux;
u_char cmd[1];
int res;
sc->sc_kbctag = pa->pa_tag;
sc->sc_kbcslot = pa->pa_slot;
printf("\n");
/* Other initialization was done by pmsprobe. */
sc->sc_state = 0;
pckbc_set_inputhandler(sc->sc_kbctag, sc->sc_kbcslot,
opmsinput, sc, sc->sc_dev.dv_xname);
/* no interrupts until enabled */
cmd[0] = PMS_DEV_DISABLE;
res = pckbc_poll_cmd(pa->pa_tag, pa->pa_slot, cmd, 1, 0, 0, 0);
if (res)
printf("opmsattach: disable error\n");
pckbc_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 0);
}
#endif
int
pmsopen(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
int unit = PMSUNIT(dev);
struct opms_softc *sc;
#if (NOPMS_PCKBC > 0)
u_char cmd[1];
int res;
#endif
if (unit >= opms_cd.cd_ndevs)
return ENXIO;
sc = opms_cd.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. */
#if (NOPMS_HACK > 0)
pms_aux_cmd(PMS_AUX_ENABLE);
pms_pit_cmd(PMS_INT_ENABLE);
pms_dev_cmd(PMS_DEV_ENABLE);
if (pms_wait_input())
pms_flush_input();
#endif
#if (NOPMS_PCKBC > 0)
pckbc_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 1);
cmd[0] = PMS_DEV_ENABLE;
res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot,
cmd, 1, 0, 1, 0);
if (res) {
printf("opms_enable: command error\n");
return (res);
}
#endif
#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
return 0;
}
int
pmsclose(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
struct opms_softc *sc = opms_cd.cd_devs[PMSUNIT(dev)];
#if (NOPMS_PCKBC > 0)
u_char cmd[1];
int res;
#endif
/* Disable interrupts. */
#if (NOPMS_HACK > 0)
pms_dev_cmd(PMS_DEV_DISABLE);
if (pms_wait_input())
pms_flush_input();
pms_pit_cmd(PMS_INT_DISABLE);
pms_aux_cmd(PMS_AUX_DISABLE);
#endif
#if (NOPMS_PCKBC > 0)
cmd[0] = PMS_DEV_DISABLE;
res = pckbc_enqueue_cmd(sc->sc_kbctag, sc->sc_kbcslot,
cmd, 1, 0, 1, 0);
if (res)
printf("opms_disable: command error\n");
pckbc_slot_enable(sc->sc_kbctag, sc->sc_kbcslot, 0);
#endif
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 opms_softc *sc = opms_cd.cd_devs[PMSUNIT(dev)];
int s;
int error = 0;
size_t length;
u_char buffer[PMS_CHUNK];
/* Block until mouse activity occurred. */
s = spltty();
while (sc->sc_q.c_cc == 0) {
if (flag & IO_NDELAY) {
splx(s);
return EWOULDBLOCK;
}
sc->sc_state |= PMS_ASLP;
error = tsleep((caddr_t)sc, PZERO | PCATCH, "pmsrea", 0);
if (error) {
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)) != 0)
break;
}
return error;
}
int
pmsioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
struct opms_softc *sc = opms_cd.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
void
opmsinput(arg, data)
void *arg;
int data;
{
struct opms_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. */
return;
}
switch (state) {
case 0:
buttons = data;
if ((buttons & 0xc0) == 0)
++state;
break;
case 1:
dx = data;
/* Bounding at -127 avoids a bug in XFree86. */
dx = (dx == -128) ? -127 : dx;
++state;
break;
case 2:
dy = 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;
}
}
#if (NOPMS_HACK > 0)
int
opmsintr(arg)
void *arg;
{
struct opms_softc *sc = arg;
int data;
if ((sc->sc_state & PMS_OPEN) == 0) {
/* Interrupts are not expected. Discard the byte. */
pms_flush_input();
return (0);
}
data = inb(PMS_DATA);
opmsinput(arg, data);
return (-1);
}
#endif
int
pmspoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
struct opms_softc *sc = opms_cd.cd_devs[PMSUNIT(dev)];
int revents = 0;
int s = spltty();
if (events & (POLLIN | POLLRDNORM)) {
if (sc->sc_q.c_cc > 0)
revents |= events & (POLLIN | POLLRDNORM);
else
selrecord(p, &sc->sc_rsel);
}
splx(s);
return (revents);
}