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|
/* $OpenBSD: ppi.c,v 1.12 2005/01/15 21:13:08 miod Exp $ */
/* $NetBSD: ppi.c,v 1.13 1997/04/02 22:37:33 scottr Exp $ */
/*
* Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved.
* Copyright (c) 1982, 1990, 1993
* The Regents of the University of California. 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.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
*
* @(#)ppi.c 8.1 (Berkeley) 6/16/93
*/
/*
* Printer/Plotter HPIB interface
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/timeout.h>
#include <sys/uio.h>
#include <hp300/dev/hpibvar.h>
#include <hp300/dev/ppiioctl.h>
struct ppi_softc {
struct device sc_dev;
int sc_flags;
struct hpibqueue sc_hq; /* HP-IB job queue entry */
struct ppiparam sc_param;
#define sc_burst sc_param.burst
#define sc_timo sc_param.timo
#define sc_delay sc_param.delay
int sc_sec;
int sc_slave; /* HP-IB slave address */
struct timeout sc_to; /* ppitimo timeout */
struct timeout sc_start_to; /* ppistart timeout */
};
/* sc_flags values */
#define PPIF_ALIVE 0x01
#define PPIF_OPEN 0x02
#define PPIF_UIO 0x04
#define PPIF_TIMO 0x08
#define PPIF_DELAY 0x10
int ppimatch(struct device *, void *, void *);
void ppiattach(struct device *, struct device *, void *);
struct cfattach ppi_ca = {
sizeof(struct ppi_softc), ppimatch, ppiattach
};
struct cfdriver ppi_cd = {
NULL, "ppi", DV_DULL
};
void ppistart(void *);
void ppinoop(void *);
void ppitimo(void *);
int ppirw(dev_t, struct uio *);
int ppihztoms(int);
int ppimstohz(int);
bdev_decl(ppi);
cdev_decl(ppi);
#define UNIT(x) minor(x)
#ifdef DEBUG
int ppidebug = 0x80;
#define PDB_FOLLOW 0x01
#define PDB_IO 0x02
#define PDB_NOCHECK 0x80
#endif
int
ppimatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
struct hpibbus_attach_args *ha = aux;
/*
* The printer/plotter doesn't return an ID tag.
* The check below prevents us from matching a CS80
* device by mistake.
*/
if (ha->ha_id & 0x200)
return (0);
/*
* To prevent matching all unused slots on the bus, we
* don't allow wildcarded locators.
*/
if (cf->hpibbuscf_slave == HPIBBUS_SLAVE_UNK ||
cf->hpibbuscf_punit == HPIBBUS_PUNIT_UNK)
return (0);
return (1);
}
void
ppiattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ppi_softc *sc = (struct ppi_softc *)self;
struct hpibbus_attach_args *ha = aux;
printf("\n");
sc->sc_slave = ha->ha_slave;
/* Initialize the hpib queue entry. */
sc->sc_hq.hq_softc = sc;
sc->sc_hq.hq_slave = sc->sc_slave;
sc->sc_hq.hq_start = ppistart;
sc->sc_hq.hq_go = ppinoop;
sc->sc_hq.hq_intr = ppinoop;
sc->sc_flags = PPIF_ALIVE;
/* Initialize timeout structures */
timeout_set(&sc->sc_to, ppitimo, sc);
timeout_set(&sc->sc_to, ppistart, sc);
}
void
ppinoop(arg)
void *arg;
{
/* Noop! */
}
int
ppiopen(dev, flags, fmt, p)
dev_t dev;
int flags, fmt;
struct proc *p;
{
int unit = UNIT(dev);
struct ppi_softc *sc;
if (unit >= ppi_cd.cd_ndevs ||
(sc = ppi_cd.cd_devs[unit]) == NULL ||
(sc->sc_flags & PPIF_ALIVE) == 0)
return (ENXIO);
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppiopen(%x, %x): flags %x\n",
dev, flags, sc->sc_flags);
#endif
if (sc->sc_flags & PPIF_OPEN)
return (EBUSY);
sc->sc_flags |= PPIF_OPEN;
sc->sc_burst = PPI_BURST;
sc->sc_timo = ppimstohz(PPI_TIMO);
sc->sc_delay = ppimstohz(PPI_DELAY);
sc->sc_sec = -1;
return(0);
}
int
ppiclose(dev, flags, fmt, p)
dev_t dev;
int flags, fmt;
struct proc *p;
{
int unit = UNIT(dev);
struct ppi_softc *sc = ppi_cd.cd_devs[unit];
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppiclose(%x, %x): flags %x\n",
dev, flags, sc->sc_flags);
#endif
sc->sc_flags &= ~PPIF_OPEN;
return(0);
}
void
ppistart(arg)
void *arg;
{
struct ppi_softc *sc = arg;
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppistart(%x)\n", sc->sc_dev.dv_unit);
#endif
sc->sc_flags &= ~PPIF_DELAY;
wakeup(sc);
}
void
ppitimo(arg)
void *arg;
{
struct ppi_softc *sc = arg;
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppitimo(%x)\n", sc->sc_dev.dv_unit);
#endif
sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO);
wakeup(sc);
}
int
ppiread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppiread(%x, %p)\n", dev, uio);
#endif
return (ppirw(dev, uio));
}
int
ppiwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
#ifdef DEBUG
if (ppidebug & PDB_FOLLOW)
printf("ppiwrite(%x, %p)\n", dev, uio);
#endif
return (ppirw(dev, uio));
}
int
ppirw(dev, uio)
dev_t dev;
struct uio *uio;
{
int unit = UNIT(dev);
struct ppi_softc *sc = ppi_cd.cd_devs[unit];
int s, len, cnt;
char *cp;
int error = 0, gotdata = 0;
int buflen, ctlr, slave;
char *buf;
if (uio->uio_resid == 0)
return(0);
ctlr = sc->sc_dev.dv_parent->dv_unit;
slave = sc->sc_slave;
#ifdef DEBUG
if (ppidebug & (PDB_FOLLOW|PDB_IO))
printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n",
dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W',
sc->sc_burst, sc->sc_timo, uio->uio_resid);
#endif
buflen = min(sc->sc_burst, uio->uio_resid);
buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK);
sc->sc_flags |= PPIF_UIO;
if (sc->sc_timo > 0) {
sc->sc_flags |= PPIF_TIMO;
timeout_add(&sc->sc_to, sc->sc_timo);
}
len = cnt = 0;
while (uio->uio_resid > 0) {
len = min(buflen, uio->uio_resid);
cp = buf;
if (uio->uio_rw == UIO_WRITE) {
error = uiomove(cp, len, uio);
if (error)
break;
}
again:
s = splbio();
if ((sc->sc_flags & PPIF_UIO) &&
hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq) == 0)
tsleep(sc, PRIBIO+1, "ppirw", 0);
/*
* Check if we timed out during sleep or uiomove
*/
(void) spllowersoftclock();
if ((sc->sc_flags & PPIF_UIO) == 0) {
#ifdef DEBUG
if (ppidebug & PDB_IO)
printf("ppirw: uiomove/sleep timo, flags %x\n",
sc->sc_flags);
#endif
if (sc->sc_flags & PPIF_TIMO) {
timeout_del(&sc->sc_to);
sc->sc_flags &= ~PPIF_TIMO;
}
splx(s);
break;
}
splx(s);
/*
* Perform the operation
*/
if (uio->uio_rw == UIO_WRITE)
cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len);
else
cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len);
s = splbio();
hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq);
#ifdef DEBUG
if (ppidebug & PDB_IO)
printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n",
uio->uio_rw == UIO_READ ? "recv" : "send",
ctlr, slave, sc->sc_sec, cp, len, cnt);
#endif
splx(s);
if (uio->uio_rw == UIO_READ) {
if (cnt) {
error = uiomove(cp, cnt, uio);
if (error)
break;
gotdata++;
}
/*
* Didn't get anything this time, but did in the past.
* Consider us done.
*/
else if (gotdata)
break;
}
s = splsoftclock();
/*
* Operation timeout (or non-blocking), quit now.
*/
if ((sc->sc_flags & PPIF_UIO) == 0) {
#ifdef DEBUG
if (ppidebug & PDB_IO)
printf("ppirw: timeout/done\n");
#endif
splx(s);
break;
}
/*
* Implement inter-read delay
*/
if (sc->sc_delay > 0) {
sc->sc_flags |= PPIF_DELAY;
timeout_add(&sc->sc_start_to, sc->sc_delay);
error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0);
if (error) {
splx(s);
break;
}
}
splx(s);
/*
* Must not call uiomove again til we've used all data
* that we already grabbed.
*/
if (uio->uio_rw == UIO_WRITE && cnt != len) {
cp += cnt;
len -= cnt;
cnt = 0;
goto again;
}
}
s = splsoftclock();
if (sc->sc_flags & PPIF_TIMO) {
timeout_del(&sc->sc_to);
sc->sc_flags &= ~PPIF_TIMO;
}
if (sc->sc_flags & PPIF_DELAY) {
timeout_del(&sc->sc_start_to);
sc->sc_flags &= ~PPIF_DELAY;
}
splx(s);
/*
* Adjust for those chars that we uiomove'ed but never wrote
*/
if (uio->uio_rw == UIO_WRITE && cnt != len) {
uio->uio_resid += (len - cnt);
#ifdef DEBUG
if (ppidebug & PDB_IO)
printf("ppirw: short write, adjust by %d\n",
len-cnt);
#endif
}
free(buf, M_DEVBUF);
#ifdef DEBUG
if (ppidebug & (PDB_FOLLOW|PDB_IO))
printf("ppirw: return %d, resid %d\n", error, uio->uio_resid);
#endif
return (error);
}
int
ppiioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct ppi_softc *sc = ppi_cd.cd_devs[UNIT(dev)];
struct ppiparam *pp, *upp;
int error = 0;
switch (cmd) {
case PPIIOCGPARAM:
pp = &sc->sc_param;
upp = (struct ppiparam *)data;
upp->burst = pp->burst;
upp->timo = ppihztoms(pp->timo);
upp->delay = ppihztoms(pp->delay);
break;
case PPIIOCSPARAM:
pp = &sc->sc_param;
upp = (struct ppiparam *)data;
if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX ||
upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX)
return(EINVAL);
pp->burst = upp->burst;
pp->timo = ppimstohz(upp->timo);
pp->delay = ppimstohz(upp->delay);
break;
case PPIIOCSSEC:
sc->sc_sec = *(int *)data;
break;
default:
return(EINVAL);
}
return (error);
}
int
ppihztoms(h)
int h;
{
extern int hz;
int m = h;
if (m > 0)
m = m * 1000 / hz;
return(m);
}
int
ppimstohz(m)
int m;
{
extern int hz;
int h = m;
if (h > 0) {
h = h * hz / 1000;
if (h == 0)
h = 1000 / hz;
}
return(h);
}
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