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NetBSD/sys/dev/ppbus/lpt.c
jdolecek 9300becc32 allow setting of interrupt usage, priming and auto LF behaviour 
via ioctl; drop the traditional device minor mapping for those in favour
of setting via lptctl(8)

introduce notion of 'control' device (minor bit 0x100 set); ATM this
device always skips the priming, which allows device open even with
disconnected printer

this also changes the default for interrupt use - polling is used
by default now
2004-02-03 21:15:03 +00:00

749 lines
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/* $NetBSD: lpt.c,v 1.12 2004/02/03 21:15:03 jdolecek Exp $ */
/*
* Copyright (c) 1990 William F. Jolitz, TeleMuse
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This software is a component of "386BSD" developed by
* William F. Jolitz, TeleMuse.
* 4. Neither the name of the developer nor the name "386BSD"
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
* NOT MAKE USE OF THIS WORK.
*
* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``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 DEVELOPER 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.
*
* from: unknown origin, 386BSD 0.1
* From Id: lpt.c,v 1.55.2.1 1996/11/12 09:08:38 phk Exp
* From Id: nlpt.c,v 1.14 1999/02/08 13:55:43 des Exp
* FreeBSD: src/sys/dev/ppbus/lpt.c,v 1.15.2.3 2000/07/07 00:30:40 obrien Exp
*/
/*
* Device Driver for AT parallel printer port
* Written by William Jolitz 12/18/90
*/
/*
* Updated for ppbus by Nicolas Souchu
* [Mon Jul 28 1997]
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: lpt.c,v 1.12 2004/02/03 21:15:03 jdolecek Exp $");
#include "opt_ppbus_lpt.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/syslog.h>
#include <machine/bus.h>
#include <dev/ppbus/ppbus_1284.h>
#include <dev/ppbus/ppbus_base.h>
#include <dev/ppbus/ppbus_io.h>
#include <dev/ppbus/ppbus_msq.h>
#include <dev/ppbus/ppbus_var.h>
#include <dev/ppbus/lptvar.h>
#include <dev/ppbus/lptreg.h>
#include <dev/ppbus/lptio.h>
/* Autoconf functions */
static int lpt_probe(struct device *, struct cfdata *, void *);
static void lpt_attach(struct device *, struct device *, void *);
static int lpt_detach(struct device *, int);
/* Autoconf structure */
CFATTACH_DECL(lpt_ppbus, sizeof(struct lpt_softc), lpt_probe, lpt_attach,
lpt_detach, NULL);
extern struct cfdriver lpt_cd;
dev_type_open(lptopen);
dev_type_close(lptclose);
dev_type_read(lptread);
dev_type_write(lptwrite);
dev_type_ioctl(lptioctl);
const struct cdevsw lpt_cdevsw = {
lptopen, lptclose, lptread, lptwrite, lptioctl,
nostop, notty, nopoll, nommap, nokqfilter
};
/* Function prototypes */
static int lpt_detect(struct device *);
static int lpt_request_ppbus(struct lpt_softc *, int);
static int lpt_release_ppbus(struct lpt_softc *, int);
static int lpt_logstatus(const struct device * const, const unsigned char);
/*
* lpt_probe()
*/
static int
lpt_probe(struct device * parent, struct cfdata * match, void * aux)
{
/* Test ppbus's capability */
return lpt_detect(parent);
}
static void
lpt_attach(struct device * parent, struct device * self, void * aux)
{
struct lpt_softc * sc = (struct lpt_softc *) self;
struct ppbus_device_softc * ppbdev = &(sc->ppbus_dev);
struct ppbus_attach_args * args = aux;
char buf[64];
int error;
error = lpt_request_ppbus(sc, 0);
if(error) {
printf("%s(%s): error (%d) requesting bus(%s). Device not "
"properly attached.\n", __func__, self->dv_xname,
error, parent->dv_xname);
return;
}
/* Record capabilities */
ppbdev->capabilities = args->capabilities;
/* Allocate memory buffers */
if(ppbdev->capabilities & PPBUS_HAS_DMA) {
if(ppbus_dma_malloc(parent, &(sc->sc_inbuf),
&(sc->sc_in_baddr), BUFSIZE)) {
printf(" : cannot allocate input DMA buffer. Device "
"not properly attached!\n");
return;
}
if(ppbus_dma_malloc(parent, &(sc->sc_outbuf),
&(sc->sc_out_baddr), BUFSIZE)) {
ppbus_dma_free(parent, &(sc->sc_inbuf),
&(sc->sc_in_baddr), BUFSIZE);
printf(" : cannot allocate output DMA buffer. Device "
"not properly attached!\n");
return;
}
} else {
sc->sc_inbuf = malloc(BUFSIZE, M_DEVBUF, M_WAITOK);
sc->sc_outbuf = malloc(BUFSIZE, M_DEVBUF, M_WAITOK);
}
/* Print out mode */
ppbdev->ctx.mode = ppbus_get_mode(parent);
bitmask_snprintf(ppbdev->ctx.mode, "\20\1COMPATIBLE\2NIBBLE"
"\3PS2\4EPP\5ECP\6FAST_CENTR", buf, sizeof(buf));
printf(": port mode = %s\n", buf);
/* Initialize the device on open by default */
sc->sc_flags = LPT_PRIME;
lpt_release_ppbus(sc, 0);
}
static int
lpt_detach(struct device * self, int flags)
{
struct lpt_softc * lpt = (struct lpt_softc *) self;
struct ppbus_device_softc * ppbdev = (struct ppbus_device_softc *) lpt;
int err;
if(lpt->sc_state & HAVEBUS) {
err = lpt_release_ppbus(lpt, 0);
if(err) {
printf("%s error (%d) while releasing bus",
self->dv_xname, err);
if(flags & DETACH_FORCE) {
printf(", continuing (DETACH_FORCE)!\n");
}
else {
printf(", terminating!\n");
return 0;
}
}
lpt->sc_state &= ~HAVEBUS;
}
ppbdev->ctx.valid = 0;
/* Free memory buffers */
if(ppbdev->capabilities & PPBUS_HAS_DMA) {
ppbus_dma_free(self->dv_parent, &(lpt->sc_inbuf),
&(lpt->sc_in_baddr), BUFSIZE);
ppbus_dma_free(self->dv_parent, &(lpt->sc_outbuf),
&(lpt->sc_out_baddr), BUFSIZE);
} else {
free(lpt->sc_inbuf, M_DEVBUF);
free(lpt->sc_outbuf, M_DEVBUF);
}
if(!(flags & DETACH_QUIET)) {
printf("%s detached", self->dv_xname);
}
return 1;
}
/* Grab bus for lpt device */
static int
lpt_request_ppbus(struct lpt_softc * lpt, int how)
{
struct device * dev = (struct device *) lpt;
int error;
error = ppbus_request_bus(dev->dv_parent, dev, how, (hz));
if (!(error)) {
lpt->sc_state |= HAVEBUS;
}
else {
LPT_DPRINTF(("%s(%s): error %d requesting bus.\n", __func__,
dev->dv_xname, error));
}
return error;
}
/* Release ppbus to enable other devices to use it. */
static int
lpt_release_ppbus(struct lpt_softc * lpt, int how)
{
struct device * dev = (struct device *) lpt;
int error;
if(lpt->sc_state & HAVEBUS) {
error = ppbus_release_bus(dev->dv_parent, dev, how, (hz));
if(!(error))
lpt->sc_state &= ~HAVEBUS;
else
LPT_DPRINTF(("%s(%s): error releasing bus.\n", __func__,
dev->dv_xname));
}
else {
error = EINVAL;
LPT_DPRINTF(("%s(%s): device does not own bus.\n", __func__,
dev->dv_xname));
}
return error;
}
/*
* Probe simplified by replacing multiple loops with a hardcoded
* test pattern - 1999/02/08 des@freebsd.org
*
* New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94
* Based partially on Rod Grimes' printer probe
*
* Logic:
* 1) If no port address was given, use the bios detected ports
* and autodetect what ports the printers are on.
* 2) Otherwise, probe the data port at the address given,
* using the method in Rod Grimes' port probe.
* (Much code ripped off directly from Rod's probe.)
*
* Comments from Rod's probe:
* Logic:
* 1) You should be able to write to and read back the same value
* to the data port. Do an alternating zeros, alternating ones,
* walking zero, and walking one test to check for stuck bits.
*
* 2) You should be able to write to and read back the same value
* to the control port lower 5 bits, the upper 3 bits are reserved
* per the IBM PC technical reference manauls and different boards
* do different things with them. Do an alternating zeros, alternating
* ones, walking zero, and walking one test to check for stuck bits.
*
* Some printers drag the strobe line down when the are powered off
* so this bit has been masked out of the control port test.
*
* XXX Some printers may not like a fast pulse on init or strobe, I
* don't know at this point, if that becomes a problem these bits
* should be turned off in the mask byte for the control port test.
*
* We are finally left with a mask of 0x14, due to some printers
* being adamant about holding other bits high ........
*
* Before probing the control port, we write a 0 to the data port -
* If not, some printers chuck out garbage when the strobe line
* gets toggled.
*
* 3) Set the data and control ports to a value of 0
*
* This probe routine has been tested on Epson Lx-800, HP LJ3P,
* Epson FX-1170 and C.Itoh 8510RM
* printers.
* Quick exit on fail added.
*/
static int
lpt_detect(struct device * dev)
{
static const u_char testbyte[18] = {
0x55, /* alternating zeros */
0xaa, /* alternating ones */
0xfe, 0xfd, 0xfb, 0xf7,
0xef, 0xdf, 0xbf, 0x7f, /* walking zero */
0x01, 0x02, 0x04, 0x08,
0x10, 0x20, 0x40, 0x80 /* walking one */
};
int i, status;
u_char dtr, ctr, str, var;
/* Save register contents */
dtr = ppbus_rdtr(dev);
ctr = ppbus_rctr(dev);
str = ppbus_rstr(dev);
status = 1; /* assume success */
/* Test data port */
for(i = 0; i < 18; i++) {
ppbus_wdtr(dev, testbyte[i]);
if((var = ppbus_rdtr(dev)) != testbyte[i]) {
status = 0;
LPT_DPRINTF(("%s(%s): byte value %x cannot be written "
"and read from data port (got %x instead).\n",
__func__, dev->dv_xname, testbyte[i], var));
goto end;
}
}
/* Test control port */
ppbus_wdtr(dev, 0);
for(i = 0; i < 18; i++) {
ppbus_wctr(dev, (testbyte[i] & 0x14));
if(((var = ppbus_rctr(dev)) & 0x14) != (testbyte[i] & 0x14)) {
status = 0;
LPT_DPRINTF(("%s(%s): byte value %x (unmasked value "
"%x) cannot be written and read from control "
"port (got %x instead).\n", __func__,
dev->dv_xname, (testbyte[i] & 0x14),
testbyte[i], (var & 0x14)));
break;
}
}
end:
/* Restore contents of registers */
ppbus_wdtr(dev, dtr);
ppbus_wctr(dev, ctr);
ppbus_wstr(dev, str);
return status;
}
/* Log status of status register for printer port */
static int
lpt_logstatus(const struct device * const dev, const unsigned char status)
{
int err;
err = EIO;
if(!(status & LPS_SEL)) {
log(LOG_ERR, "%s: offline.", dev->dv_xname);
}
else if(!(status & LPS_NBSY)) {
log(LOG_ERR, "%s: busy.", dev->dv_xname);
}
else if(status & LPS_OUT) {
log(LOG_ERR, "%s: out of paper.", dev->dv_xname);
err = EAGAIN;
}
else if(!(status & LPS_NERR)) {
log(LOG_ERR, "%s: output error.", dev->dv_xname);
}
else {
log(LOG_ERR, "%s: no error indication.", dev->dv_xname);
err = 0;
}
return err;
}
/*
* lptopen -- reset the printer, then wait until it's selected and not busy.
*/
int
lptopen(dev_t dev_id, int flags, int fmt, struct proc *p)
{
int trys, err;
u_int8_t status;
struct device * dev;
struct lpt_softc * lpt;
struct ppbus_device_softc * ppbus_dev;
struct device * ppbus;
dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
if(!dev) {
LPT_DPRINTF(("%s(): device not configured.\n", __func__));
return ENXIO;
}
lpt = (struct lpt_softc *) dev;
ppbus = dev->dv_parent;
ppbus_dev = &(lpt->ppbus_dev);
/* Request the ppbus */
err = lpt_request_ppbus(lpt, PPBUS_WAIT|PPBUS_INTR);
if(err) {
LPT_DPRINTF(("%s(%s): error (%d) while requesting bus.\n",
__func__, dev->dv_xname, err));
return (err);
}
/* Update bus mode */
ppbus_dev->ctx.mode = ppbus_get_mode(ppbus);
/* init printer */
if ((lpt->sc_flags & LPT_PRIME) && !LPTCTL(dev_id)) {
LPT_VPRINTF(("%s(%s): initializing printer.\n", __func__,
dev->dv_xname));
lpt->sc_state |= LPTINIT;
ppbus_wctr(ppbus, LPC_SEL | LPC_NINIT);
/* wait till ready (printer running diagnostics) */
for(trys = 0, status = ppbus_rstr(ppbus); (status & RDY_MASK)
!= LP_READY; trys += LPT_STEP, status =
ppbus_rstr(ppbus)) {
/* Time up waiting for the printer */
if(trys >= LPT_TIMEOUT)
break;
/* wait LPT_STEP ticks, give up if we get a signal */
else {
err = tsleep((caddr_t)lpt, LPPRI|PCATCH,
"lptinit", LPT_STEP);
if((err) && (err != EWOULDBLOCK)) {
lpt->sc_state &= ~LPTINIT;
LPT_DPRINTF(("%s(%s): interrupted "
"during initialization.\n", __func__,
dev->dv_xname));
lpt_release_ppbus(lpt, PPBUS_WAIT);
return (err);
}
}
}
lpt->sc_state &= ~LPTINIT;
if(trys >= LPT_TIMEOUT) {
LPT_DPRINTF(("%s(%s): timed out while initializing "
"printer. [status %x]\n", __func__,
dev->dv_xname, status));
err = lpt_logstatus(dev, status);
lpt_release_ppbus(lpt, PPBUS_WAIT);
return (err);
}
else
LPT_VPRINTF(("%s(%s): printer ready.\n", __func__,
dev->dv_xname));
}
/* Set autolinefeed if requested */
if (lpt->sc_flags & LPT_AUTOLF)
ppbus_wctr(ppbus, LPC_AUTOL);
else
ppbus_wctr(ppbus, 0);
/* ready now */
lpt->sc_state |= OPEN;
return 0;
}
/*
* lptclose -- close the device, free the local line buffer.
*
* Check for interrupted write call added.
*/
int
lptclose(dev_t dev_id, int flags, int fmt, struct proc *p)
{
struct device * dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
struct lpt_softc * sc = (struct lpt_softc *) dev;
int err;
err = lpt_release_ppbus(sc, PPBUS_WAIT|PPBUS_INTR);
if(err) {
LPT_DPRINTF(("%s(%s): error (%d) while releasing ppbus.\n",
__func__, dev->dv_xname, err));
}
sc->sc_state = 0;
return err;
}
/*
* lptread --retrieve printer status in IEEE1284 NIBBLE mode
*/
int
lptread(dev_t dev_id, struct uio *uio, int ioflag)
{
size_t len = 0;
int error = 0;
struct device * dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
struct lpt_softc * sc = (struct lpt_softc *) dev;
if(!(sc->sc_state & HAVEBUS)) {
LPT_DPRINTF(("%s(%s): attempt to read using device which does "
"not own the bus(%s).\n", __func__, dev->dv_xname,
dev->dv_parent->dv_xname));
return (ENODEV);
}
sc->sc_state &= ~INTERRUPTED;
while (uio->uio_resid) {
error = ppbus_read(dev->dv_parent, sc->sc_outbuf,
min(BUFSIZE, uio->uio_resid), 0, &len);
/* If error or no more data, stop */
if (error) {
if (error != EWOULDBLOCK)
sc->sc_state |= INTERRUPTED;
break;
}
if (len == 0)
break;
if ((error = uiomove(sc->sc_outbuf, len, uio)))
break;
}
return error;
}
/*
* lptwrite --copy a line from user space to a local buffer, then call
* putc to get the chars moved to the output queue.
*
* Flagging of interrupted write added.
*/
int
lptwrite(dev_t dev_id, struct uio * uio, int ioflag)
{
int error=0;
size_t n, cnt;
struct device * dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
struct lpt_softc * sc = (struct lpt_softc *) dev;
/* Check state and flags */
if(!(sc->sc_state & HAVEBUS)) {
LPT_DPRINTF(("%s(%s): attempt to write using device which does "
"not own the bus(%s).\n", __func__, dev->dv_xname,
dev->dv_parent->dv_xname));
return EINVAL;
}
LPT_VPRINTF(("%s(%s): writing %d bytes\n", __func__,
dev->dv_xname, uio->uio_resid));
/* Write the data */
sc->sc_state &= ~INTERRUPTED;
while (uio->uio_resid) {
n = MIN(BUFSIZE, uio->uio_resid);
error = uiomove(sc->sc_inbuf, n, uio);
if (error)
break;
error = ppbus_write(dev->dv_parent, sc->sc_inbuf, n, ioflag,
&cnt);
if (error) {
if (error != EWOULDBLOCK)
sc->sc_state |= INTERRUPTED;
break;
}
}
LPT_VPRINTF(("%s(%s): transfer finished, error %d.\n", __func__,
dev->dv_xname, error));
return error;
}
/* Printer ioctl */
int
lptioctl(dev_t dev_id, u_long cmd, caddr_t data, int flags, struct proc *p)
{
struct device *dev = device_lookup(&lpt_cd, LPTUNIT(dev_id));
struct lpt_softc *sc = (struct lpt_softc *) dev;
int val, fl;
int error=0;
if(!(sc->sc_state & HAVEBUS)) {
LPT_DPRINTF(("%s(%s): attempt to perform ioctl on device which "
"does not own the bus(%s).\n", __func__, dev->dv_xname,
dev->dv_parent->dv_xname));
return EBUSY;
}
switch (cmd) {
case LPTGMODE:
switch (ppbus_get_mode(dev->dv_parent)) {
case PPBUS_COMPATIBLE:
val = mode_standard;
break;
case PPBUS_NIBBLE:
val = mode_nibble;
break;
case PPBUS_PS2:
val = mode_ps2;
break;
case PPBUS_FAST:
val = mode_fast;
break;
case PPBUS_EPP:
val = mode_epp;
break;
case PPBUS_ECP:
val = mode_ecp;
break;
default:
error = EINVAL;
val = mode_unknown;
break;
}
*(int *)data = val;
break;
case LPTSMODE:
switch (*(int *)data) {
case mode_standard:
val = PPBUS_COMPATIBLE;
break;
case mode_nibble:
val = PPBUS_NIBBLE;
break;
case mode_ps2:
val = PPBUS_PS2;
break;
case mode_fast:
val = PPBUS_FAST;
break;
case mode_epp:
val = PPBUS_EPP;
break;
case mode_ecp:
val = PPBUS_ECP;
break;
default:
error = EINVAL;
val = mode_unknown;
break;
}
if (!error)
error = ppbus_set_mode(dev->dv_parent, val, 0);
break;
case LPTGFLAGS:
fl = 0;
/* DMA */
error = ppbus_read_ivar(dev->dv_parent, PPBUS_IVAR_DMA, &val);
if (error)
break;
if (val)
fl |= LPT_DMA;
/* IEEE mode negotiation */
error = ppbus_read_ivar(dev->dv_parent, PPBUS_IVAR_IEEE, &val);
if (error)
break;
if (val)
fl |= LPT_IEEE;
/* interrupts */
error = ppbus_read_ivar(dev->dv_parent, PPBUS_IVAR_INTR, &val);
if (error)
break;
if (val)
fl |= LPT_INTR;
/* lpt-only flags */
fl |= sc->sc_flags;
*(int *)data = fl;
break;
case LPTSFLAGS:
fl = *(int *)data;
/* DMA */
val = (fl & LPT_DMA);
error = ppbus_write_ivar(dev->dv_parent, PPBUS_IVAR_DMA, &val);
if (error)
break;
/* IEEE mode negotiation */
val = (fl & LPT_IEEE);
error = ppbus_write_ivar(dev->dv_parent, PPBUS_IVAR_IEEE, &val);
if (error)
break;
/* interrupts */
val = (fl & LPT_INTR);
error = ppbus_write_ivar(dev->dv_parent, PPBUS_IVAR_INTR, &val);
if (error)
break;
/* lpt-only flags */
sc->sc_flags = fl & (LPT_PRIME|LPT_AUTOLF);
break;
default:
error = EINVAL;
break;
}
return error;
}
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