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NetBSD/sys/arch/arm32/mainbus/lpt.c

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/* $NetBSD: lpt.c,v 1.13 1996/11/23 03:56:02 mark Exp $ */
/*
* Copyright (c) 1994 Matthias Pfaller.
* Copyright (c) 1993, 1994 Charles Hannum.
* 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.
*/
/*
* Device Driver for AT parallel printer port
*/
/*
* PLIP code Copyright (c) 1994 Matthias Pfaller from pc532/dev/lpt.c
*
* Merged into the arm32/mainbus/lpt.c by Mark Brinicombe
*/
/* NOTE: The PLIP code does not work at the moment
*
* The lpt code needed upgrading to fix some bugs in the previous version
* The new version uses the bus_io_*() macros which makes this code
* incompatible with the previous plip driver.
* The plip code is being upgraded but is not complete.
*
* Normally I would hold off committing until I had finished but
* more of people want a working lpt driver than the plip driver.
*
* Thus if you use plip stick to the old version of this driver for now.
*/
#undef PLIP
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>
#include <sys/uio.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/syslog.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/katelib.h>
#include <machine/irqhandler.h>
#include <machine/io.h>
#include <arm32/mainbus/lptreg.h>
#include <arm32/mainbus/mainbus.h>
#if defined(INET) && defined(PLIP)
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#endif
#define TIMEOUT hz*16 /* wait up to 16 seconds for a ready */
#define STEP hz/4
#define LPTPRI (PZERO+8)
#define LPT_BSIZE 1024
#if !defined(DEBUG) || !defined(notdef)
#define LPRINTF(a)
#else
#define LPRINTF if (lptdebug) printf a
int lptdebug = 1;
#endif
#if defined(INET) && defined(PLIP)
#ifndef PLIPMTU /* MTU for the plip# interfaces */
#if defined(COMPAT_PLIP10)
#define PLIPMTU 1600 /* Linux 1.0.x */
#elif defined(COMPAT_PLIP11)
#define PLIPMTU (ETHERMTU - ifp->if_hdrlen) /* Linux 1.1.x */
#else
#define PLIPMTU ETHERMTU /* Linux 1.3.x */
#endif
#endif
#ifndef PLIPMXSPIN1 /* DELAY factor for the plip# interfaces */
#define PLIPMXSPIN1 2000 /* Spinning for remote intr to happen */
#endif
#ifndef PLIPMXSPIN2 /* DELAY factor for the plip# interfaces */
#define PLIPMXSPIN2 6000 /* Spinning for remote handshake to happen */
#endif
#ifndef PLIPMXERRS /* Max errors before !RUNNING */
#define PLIPMXERRS 20
#endif
#ifndef PLIPMXRETRY
#define PLIPMXRETRY 20 /* Max number of retransmits */
#endif
#ifndef PLIPRETRY
#define PLIPRETRY hz/50 /* Time between retransmits */
#endif
#endif
struct lpt_softc {
struct device sc_dev;
irqhandler_t sc_ih;
size_t sc_count;
struct buf *sc_inbuf;
u_char *sc_cp;
int sc_spinmax;
int sc_iobase;
bus_chipset_tag_t sc_bc;
bus_io_handle_t sc_ioh;
int sc_irq;
u_char sc_state;
#define LPT_OPEN 0x01 /* device is open */
#define LPT_OBUSY 0x02 /* printer is busy doing output */
#define LPT_INIT 0x04 /* waiting to initialize for open */
#define LPT_PLIP 0x08 /* busy with PLIP */
u_char sc_flags;
#define LPT_AUTOLF 0x20 /* automatic LF on CR */
#define LPT_NOPRIME 0x40 /* don't prime on open */
#define LPT_NOINTR 0x80 /* do not use interrupt */
u_char sc_control;
u_char sc_laststatus;
#if defined(INET) && defined(PLIP)
struct arpcom sc_arpcom;
u_char *sc_ifbuf;
int sc_ifierrs; /* consecutive input errors */
int sc_ifoerrs; /* consecutive output errors */
int sc_ifsoftint; /* i/o software interrupt */
volatile int sc_pending; /* interrputs pending */
#define PLIP_IPENDING 1
#define PLIP_OPENDING 2
#if defined(COMPAT_PLIP10)
u_char sc_adrcksum;
#endif
#endif
};
/* XXX does not belong here */
cdev_decl(lpt);
int lptprobe __P((struct device *, void *, void *));
void lptattach __P((struct device *, struct device *, void *));
int lptintr __P((void *));
#if defined(INET) && defined(PLIP)
/* Functions for the plip# interface */
static void plipattach(struct lpt_softc *,int);
static int plipioctl(struct ifnet *, u_long, caddr_t);
void plipsoftint(struct lpt_softc *);
static void plipinput(struct lpt_softc *);
static void plipstart(struct ifnet *);
static void plipoutput(struct lpt_softc *);
#endif
struct cfattach lpt_ca = {
sizeof(struct lpt_softc), lptprobe, lptattach
};
struct cfdriver lpt_cd = {
NULL, "lpt", DV_TTY
};
#define LPTUNIT(s) (minor(s) & 0x1f)
#define LPTFLAGS(s) (minor(s) & 0xe0)
#define LPS_INVERT (LPS_SELECT|LPS_NERR|LPS_NBSY|LPS_NACK)
#define LPS_MASK (LPS_SELECT|LPS_NERR|LPS_NBSY|LPS_NACK|LPS_NOPAPER)
#define NOT_READY() ((bus_io_read_1(bc, ioh, lpt_status) ^ LPS_INVERT) & LPS_MASK)
#define NOT_READY_ERR() not_ready(bus_io_read_1(bc, ioh, lpt_status), sc)
static int not_ready __P((u_char, struct lpt_softc *));
static void lptwakeup __P((void *arg));
static int pushbytes __P((struct lpt_softc *));
int lpt_port_test __P((bus_chipset_tag_t, bus_io_handle_t, bus_io_addr_t,
bus_io_size_t, u_char, u_char));
/*
* Internal routine to lptprobe to do port tests of one byte value.
*/
int
lpt_port_test(bc, ioh, base, off, data, mask)
bus_chipset_tag_t bc;
bus_io_handle_t ioh;
bus_io_addr_t base;
bus_io_size_t off;
u_char data, mask;
{
int timeout;
u_char temp;
data &= mask;
bus_io_write_1(bc, ioh, off, data);
timeout = 1000;
do {
delay(10);
temp = bus_io_read_1(bc, ioh, off) & mask;
} while (temp != data && --timeout);
LPRINTF(("lpt: port=0x%x out=0x%x in=0x%x timeout=%d\n", base + off,
data, temp, timeout));
return (temp == data);
}
/*
* 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.
*
* 3) Set the data and control ports to a value of 0
*/
int
lptprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct mainbus_attach_args *mb = aux;
bus_chipset_tag_t bc;
bus_io_handle_t ioh;
u_long base;
u_char mask, data;
int i, rv;
#ifdef DEBUG
#define ABORT do {printf("lptprobe: mask %x data %x failed\n", mask, data); \
goto out;} while (0)
#else
#define ABORT goto out
#endif
bc = NULL;
base = mb->mb_iobase;
if (bus_io_map(bc, base, LPT_NPORTS, &ioh))
return 0;
rv = 0;
mask = 0xff;
data = 0x55; /* Alternating zeros */
if (!lpt_port_test(bc, ioh, base, lpt_data, data, mask))
ABORT;
data = 0xaa; /* Alternating ones */
if (!lpt_port_test(bc, ioh, base, lpt_data, data, mask))
ABORT;
for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
data = ~(1 << i);
if (!lpt_port_test(bc, ioh, base, lpt_data, data, mask))
ABORT;
}
for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
data = (1 << i);
if (!lpt_port_test(bc, ioh, base, lpt_data, data, mask))
ABORT;
}
bus_io_write_1(bc, ioh, lpt_data, 0);
bus_io_write_1(bc, ioh, lpt_control, 0);
mb->mb_iosize = LPT_NPORTS;
rv = 1;
out:
bus_io_unmap(bc, ioh, LPT_NPORTS);
return rv;
}
void
lptattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct lpt_softc *sc = (void *)self;
struct mainbus_attach_args *mb = aux;
bus_chipset_tag_t bc;
bus_io_handle_t ioh;
if (mb->mb_irq != IRQUNK)
printf("\n");
else
printf(": polled\n");
sc->sc_iobase = mb->mb_iobase;
sc->sc_irq = mb->mb_irq;
sc->sc_state = 0;
bc = sc->sc_bc = NULL;
if (bus_io_map(bc, sc->sc_iobase, LPT_NPORTS, &ioh))
panic("lptattach: couldn't map I/O ports");
sc->sc_ioh = ioh;
bus_io_write_1(bc, ioh, lpt_control, LPC_NINIT);
#if defined(INET) && defined(PLIP)
plipattach(sc, self->dv_unit);
#endif
if (mb->mb_irq != IRQUNK) {
sc->sc_ih.ih_func = lptintr;
sc->sc_ih.ih_arg = sc;
sc->sc_ih.ih_level = IPL_TTY;
sc->sc_ih.ih_name = "lpt";
if (irq_claim(mb->mb_irq, &sc->sc_ih))
panic("Cannot claim IRQ %d for lpt%d\n", mb->mb_irq, sc->sc_dev.dv_unit);
}
#if defined(INET) && defined(PLIP)
else
printf("Warning PLIP device needs an interrupt driven lpt driver\n");
#endif
}
/*
* Reset the printer, then wait until it's selected and not busy.
*/
int
lptopen(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
int unit = LPTUNIT(dev);
u_char flags = LPTFLAGS(dev);
struct lpt_softc *sc;
bus_chipset_tag_t bc;
bus_io_handle_t ioh;
u_char control;
int error;
int spin;
if (unit >= lpt_cd.cd_ndevs)
return ENXIO;
sc = lpt_cd.cd_devs[unit];
if (!sc)
return ENXIO;
if (sc->sc_irq == IRQUNK && (flags & LPT_NOINTR) == 0)
return ENXIO;
#ifdef DIAGNOSTIC
if (sc->sc_state)
printf("%s: stat=0x%x not zero\n", sc->sc_dev.dv_xname,
sc->sc_state);
#endif
if (sc->sc_state)
return EBUSY;
sc->sc_state = LPT_INIT;
sc->sc_flags = flags;
LPRINTF(("%s: open: flags=0x%x\n", sc->sc_dev.dv_xname, flags));
bc = sc->sc_bc;
ioh = sc->sc_ioh;
if ((flags & LPT_NOPRIME) == 0) {
/* assert INIT for 100 usec to start up printer */
bus_io_write_1(bc, ioh, lpt_control, LPC_SELECT);
delay(100);
}
control = LPC_SELECT | LPC_NINIT;
bus_io_write_1(bc, ioh, lpt_control, control);
/* wait till ready (printer running diagnostics) */
for (spin = 0; NOT_READY_ERR(); spin += STEP) {
if (spin >= TIMEOUT) {
sc->sc_state = 0;
return EBUSY;
}
/* wait 1/4 second, give up if we get a signal */
error = tsleep((caddr_t)sc, LPTPRI | PCATCH, "lptopen", STEP);
if (error != EWOULDBLOCK) {
sc->sc_state = 0;
return error;
}
}
if ((flags & LPT_NOINTR) == 0)
control |= LPC_IENABLE;
if (flags & LPT_AUTOLF)
control |= LPC_AUTOLF;
sc->sc_control = control;
bus_io_write_1(bc, ioh, lpt_control, control);
sc->sc_inbuf = geteblk(LPT_BSIZE);
sc->sc_count = 0;
sc->sc_state = LPT_OPEN;
if ((sc->sc_flags & LPT_NOINTR) == 0)
lptwakeup(sc);
LPRINTF(("%s: opened\n", sc->sc_dev.dv_xname));
return 0;
}
int
not_ready(status, sc)
u_char status;
struct lpt_softc *sc;
{
u_char new;
status = (status ^ LPS_INVERT) & LPS_MASK;
new = status & ~sc->sc_laststatus;
sc->sc_laststatus = status;
if (new & LPS_SELECT)
log(LOG_NOTICE, "%s: offline\n", sc->sc_dev.dv_xname);
else if (new & LPS_NOPAPER)
log(LOG_NOTICE, "%s: out of paper\n", sc->sc_dev.dv_xname);
else if (new & LPS_NERR)
log(LOG_NOTICE, "%s: output error\n", sc->sc_dev.dv_xname);
return status;
}
void
lptwakeup(arg)
void *arg;
{
struct lpt_softc *sc = arg;
int s;
s = spltty();
lptintr(sc);
splx(s);
timeout(lptwakeup, sc, STEP);
}
/*
* Close the device, and free the local line buffer.
*/
int
lptclose(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
int unit = LPTUNIT(dev);
struct lpt_softc *sc = lpt_cd.cd_devs[unit];
bus_chipset_tag_t bc = sc->sc_bc;
bus_io_handle_t ioh = sc->sc_ioh;
if (sc->sc_count)
(void) pushbytes(sc);
if ((sc->sc_flags & LPT_NOINTR) == 0)
untimeout(lptwakeup, sc);
bus_io_write_1(bc, ioh, lpt_control, LPC_NINIT);
sc->sc_state = 0;
bus_io_write_1(bc, ioh, lpt_control, LPC_NINIT);
brelse(sc->sc_inbuf);
LPRINTF(("%s: closed\n", sc->sc_dev.dv_xname));
return 0;
}
int
pushbytes(sc)
struct lpt_softc *sc;
{
bus_chipset_tag_t bc = sc->sc_bc;
bus_io_handle_t ioh = sc->sc_ioh;
int error;
if (sc->sc_flags & LPT_NOINTR) {
int spin, tic;
u_char control = sc->sc_control;
while (sc->sc_count > 0) {
spin = 0;
while (NOT_READY()) {
if (++spin < sc->sc_spinmax)
continue;
tic = 0;
/* adapt busy-wait algorithm */
sc->sc_spinmax++;
while (NOT_READY_ERR()) {
/* exponential backoff */
tic = tic + tic + 1;
if (tic > TIMEOUT)
tic = TIMEOUT;
error = tsleep((caddr_t)sc,
LPTPRI | PCATCH, "lptpsh", tic);
if (error != EWOULDBLOCK)
return error;
}
break;
}
bus_io_write_1(bc, ioh, lpt_data, *sc->sc_cp++);
bus_io_write_1(bc, ioh, lpt_control, control | LPC_STROBE);
sc->sc_count--;
bus_io_write_1(bc, ioh, lpt_control, control);
/* adapt busy-wait algorithm */
if (spin*2 + 16 < sc->sc_spinmax)
sc->sc_spinmax--;
}
} else {
int s;
while (sc->sc_count > 0) {
/* if the printer is ready for a char, give it one */
if ((sc->sc_state & LPT_OBUSY) == 0) {
LPRINTF(("%s: write %d\n", sc->sc_dev.dv_xname,
sc->sc_count));
s = spltty();
(void) lptintr(sc);
splx(s);
}
error = tsleep((caddr_t)sc, LPTPRI | PCATCH,
"lptwrite2", 0);
if (error)
return error;
}
}
return 0;
}
/*
* Copy a line from user space to a local buffer, then call putc to get the
* chars moved to the output queue.
*/
int
lptwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
struct lpt_softc *sc = lpt_cd.cd_devs[LPTUNIT(dev)];
size_t n;
int error = 0;
while ((n = min(LPT_BSIZE, uio->uio_resid)) != 0) {
uiomove(sc->sc_cp = sc->sc_inbuf->b_data, n, uio);
sc->sc_count = n;
error = pushbytes(sc);
if (error) {
/*
* Return accurate residual if interrupted or timed
* out.
*/
uio->uio_resid += sc->sc_count;
sc->sc_count = 0;
return error;
}
}
return 0;
}
/*
* Handle printer interrupts which occur when the printer is ready to accept
* another char.
*/
int
lptintr(arg)
void *arg;
{
struct lpt_softc *sc = arg;
bus_chipset_tag_t bc = sc->sc_bc;
bus_io_handle_t ioh = sc->sc_ioh;
#if 0
if ((sc->sc_state & LPT_OPEN) == 0)
return 0;
#endif
#if defined(INET) && defined(PLIP)
if (sc->sc_arpcom.ac_if.if_flags & IFF_UP) {
/* i8255->port_a &= ~LPA_ACKENABLE;*/
/* YYYY */
sc->sc_pending |= PLIP_IPENDING;
setsoftintr(sc->sc_ifsoftint);
return(1); /* Claim interrupt */
}
#endif
/* is printer online and ready for output */
if (NOT_READY() && NOT_READY_ERR())
return 0;
if (sc->sc_count) {
u_char control = sc->sc_control;
/* send char */
bus_io_write_1(bc, ioh, lpt_data, *sc->sc_cp++);
bus_io_write_1(bc, ioh, lpt_control, control | LPC_STROBE);
sc->sc_count--;
bus_io_write_1(bc, ioh, lpt_control, control);
sc->sc_state |= LPT_OBUSY;
} else
sc->sc_state &= ~LPT_OBUSY;
if (sc->sc_count == 0) {
/* none, wake up the top half to get more */
wakeup((caddr_t)sc);
}
return 1; /* Claim interrupt */
}
int
lptioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
int error = 0;
switch (cmd) {
default:
error = ENODEV;
}
return error;
}
#if defined(INET) && defined(PLIP)
#define PLIP_INTR_ENABLE (LPC_NINIT | LPC_SELECT | LPC_IENABLE)
#define PLIP_INTR_DISABLE (LPC_NINIT | LPC_SELECT)
#define PLIP_DATA (lpt_data)
#define PLIP_STATUS (lpt_status)
#define PLIP_CONTROL (lpt_control)
#define PLIP_REMOTE_TRIGGER 0x08
#define PLIP_DELAY_UNIT 50
#if PLIP_DELAY_UNIT > 0
#define PLIP_DELAY DELAY(PLIP_DELAY_UNIT)
#else
#define PLIP_DELAY
#endif
#define PLIP_DEBUG_RX 0x01
#define PLIP_DEBUG_TX 0x02
#define PLIP_DEBUG_IF 0x04
#define PLIP_DEBUG 0x07
#if PLIP_DEBUG != 0
static int plip_debug = PLIP_DEBUG;
#endif
static void
plipattach(struct lpt_softc *sc, int unit)
{
struct ifnet *ifp = &sc->sc_arpcom.ac_if;
sc->sc_ifbuf = NULL;
sprintf(ifp->if_xname, "plip%d", unit);
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS;
ifp->if_output = ether_output;
ifp->if_start = plipstart;
ifp->if_ioctl = plipioctl;
ifp->if_watchdog = 0;
ifp->if_type = IFT_ETHER;
ifp->if_addrlen = 6;
ifp->if_hdrlen = 14;
ifp->if_mtu = PLIPMTU;
sc->sc_ifsoftint = IRQMASK_SOFTPLIP;
printf("plip%d at lpt%d: mtu=%d,%d,%d", unit, unit, (int) ifp->if_mtu,
ifp->if_hdrlen, ifp->if_addrlen);
if_attach(ifp);
}
/*
* Process an ioctl request.
*/
static int
plipioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct proc *p = curproc;
struct lpt_softc *sc = (struct lpt_softc *)(ifp->if_softc);
bus_chipset_tag_t bc = sc->sc_bc;
bus_io_handle_t ioh = sc->sc_ioh;
struct ifaddr *ifa = (struct ifaddr *)data;
struct ifreq *ifr = (struct ifreq *)data;
int s;
int error = 0;
#if PLIP_DEBUG > 0
printf("plipioctl: cmd=%08lx ifp=%08x data=%08x\n", cmd, (u_int)ifp, (u_int)data);
printf("plipioctl: ifp->flags=%08x\n", ifp->if_flags);
#endif
switch (cmd) {
case SIOCSIFFLAGS:
if (((ifp->if_flags & IFF_UP) == 0) &&
(ifp->if_flags & IFF_RUNNING)) {
ifp->if_flags &= ~IFF_RUNNING;
/* Deactive the parallel port */
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_IF)
printf("plip: Disabling lpt irqs\n");
#endif
bus_io_write_1(bc, ioh, lpt_data, 0x00);
bus_io_write_1(bc, ioh, lpt_control, PLIP_INTR_DISABLE);
/* sc->sc_i8255->port_control = LPT_MODE;
i8255->port_a = LPA_ACTIVE | LPA_NPRIME;*/
if (sc->sc_ifbuf)
free(sc->sc_ifbuf, M_DEVBUF);
sc->sc_ifbuf = NULL;
}
if (((ifp->if_flags & IFF_UP)) &&
((ifp->if_flags & IFF_RUNNING) == 0)) {
if (sc->sc_state) {
error = EBUSY;
break;
}
if (!sc->sc_ifbuf)
sc->sc_ifbuf =
malloc(ifp->if_mtu + ifp->if_hdrlen,
M_DEVBUF, M_WAITOK);
ifp->if_flags |= IFF_RUNNING;
/* This starts it running */
/* Enable lpt interrupts */
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_IF)
printf("plip: Enabling lpt irqs\n");
#endif
bus_io_write_1(bc, ioh, lpt_data, 0x00);
bus_io_write_1(bc, ioh, lpt_control, PLIP_INTR_ENABLE);
/* sc->sc_i8255->port_control = LPT_IRQDISABLE;
sc->sc_i8255->port_b = 0;
sc->sc_i8255->port_a |= LPA_ACKENABLE;*/
}
break;
case SIOCSIFADDR:
if (ifa->ifa_addr->sa_family == AF_INET) {
if (!sc->sc_ifbuf)
sc->sc_ifbuf =
malloc(PLIPMTU + ifp->if_hdrlen,
M_DEVBUF, M_WAITOK);
sc->sc_arpcom.ac_enaddr[0] = 0xfc;
sc->sc_arpcom.ac_enaddr[1] = 0xfc;
bcopy((caddr_t)&IA_SIN(ifa)->sin_addr,
(caddr_t)&sc->sc_arpcom.ac_enaddr[2], 4);
#if defined(COMPAT_PLIP10)
if (ifp->if_flags & IFF_LINK0) {
int i;
sc->sc_arpcom.ac_enaddr[0] = 0xfd;
sc->sc_arpcom.ac_enaddr[1] = 0xfd;
for (i = sc->sc_adrcksum = 0; i < 5; i++)
sc->sc_adrcksum += sc->sc_arpcom.ac_enaddr[i];
sc->sc_adrcksum *= 2;
}
#endif
ifp->if_flags |= IFF_RUNNING | IFF_UP;
#if 0
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
struct sockaddr_dl *sdl;
if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
sdl->sdl_family == AF_LINK) {
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = ifp->if_addrlen;
bcopy((caddr_t)((struct arpcom *)ifp)->ac_enaddr,
LLADDR(sdl), ifp->if_addrlen);
break;
}
}
#endif
/* Looks the same as the start condition above */
/* Enable lpt interrupts */
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_IF)
printf("plip: Enabling lpt irqs\n");
#endif
bus_io_write_1(bc, ioh, lpt_data, 0x00);
bus_io_write_1(bc, ioh, lpt_control, PLIP_INTR_ENABLE);
/* sc->sc_i8255->port_control = LPT_IRQDISABLE;
sc->sc_i8255->port_b = 0;
sc->sc_i8255->port_a |= LPA_ACKENABLE;*/
arp_ifinit(&sc->sc_arpcom, ifa);
} else
error = EAFNOSUPPORT;
break;
case SIOCAIFADDR:
case SIOCDIFADDR:
case SIOCSIFDSTADDR:
if (ifa->ifa_addr->sa_family != AF_INET)
error = EAFNOSUPPORT;
break;
case SIOCSIFMTU:
if ((error = suser(p->p_ucred, &p->p_acflag)))
return(error);
if (ifp->if_mtu != ifr->ifr_mtu) {
ifp->if_mtu = ifr->ifr_mtu;
if (sc->sc_ifbuf) {
s = splimp();
free(sc->sc_ifbuf, M_DEVBUF);
sc->sc_ifbuf =
malloc(ifp->if_mtu + ifp->if_hdrlen,
M_DEVBUF, M_WAITOK);
splx(s);
}
}
break;
default:
error = EINVAL;
}
return (error);
}
void
plipintr(struct lpt_softc *sc)
{
int pending;
sc = lpt_cd.cd_devs[0];
pending = sc->sc_pending;
while (sc->sc_pending & PLIP_IPENDING) {
pending |= sc->sc_pending;
sc->sc_pending = 0;
plipinput(sc);
}
if (pending & PLIP_OPENDING)
plipoutput(sc);
}
static int
plipreceive(bc, ioh, buf, len)
bus_chipset_tag_t bc;
bus_io_handle_t ioh;
u_char *buf;
int len;
{
int i;
u_char cksum = 0, c;
while (len--) {
i = PLIPMXSPIN2;
while (((bus_io_read_1(bc, ioh, lpt_status)) & LPS_NBSY) != 0)
if (i-- < 0) return -1;
c = ((bus_io_read_1(bc, ioh, lpt_status)) >> 3) & 0x0f;
bus_io_write_1(bc, ioh, lpt_data, 0x11);
while (((bus_io_read_1(bc, ioh, lpt_status)) & LPS_NBSY) == 0)
if (i-- < 0) return -1;
c |= ((bus_io_read_1(bc, ioh, lpt_status)) << 1) & 0xf0;
bus_io_write_1(bc, ioh, lpt_data, 0x01);
cksum += (*buf++ = c);
}
return(cksum);
}
static void
plipinput(struct lpt_softc *sc)
{
extern struct mbuf *m_devget(char *, int, int, struct ifnet *, void (*)());
struct ifnet *ifp = &sc->sc_arpcom.ac_if;
bus_chipset_tag_t bc = sc->sc_bc;
bus_io_handle_t ioh = sc->sc_ioh;
struct mbuf *m;
struct ether_header *eh;
u_char *p = sc->sc_ifbuf, minibuf[4];
int c, i = 0, s, len, cksum;
/* YYYY */
/* if (!(i8255->port_c & LPC_NACK)) {
i8255->port_a |= LPA_ACKENABLE;
ifp->if_collisions++;
return;
}*/
bus_io_write_1(bc, ioh, lpt_data, 0x01);
bus_io_write_1(bc, ioh, lpt_control, PLIP_INTR_DISABLE);
/* i8255->port_b = 0x01;
i8255->port_a &= ~(LPA_ACKENABLE | LPA_ACTIVE);*/
#if defined(COMPAT_PLIP10)
if (ifp->if_flags & IFF_LINK0) {
if (plipreceive(bc, ioh, minibuf, 3) < 0) goto err;
len = (minibuf[1] << 8) | minibuf[2];
if (len > (ifp->if_mtu + ifp->if_hdrlen)) goto err;
switch (minibuf[0]) {
case 0xfc:
p[0] = p[ 6] = ifp->ac_enaddr[0];
p[1] = p[ 7] = ifp->ac_enaddr[1];
p[2] = p[ 8] = ifp->ac_enaddr[2];
p[3] = p[ 9] = ifp->ac_enaddr[3];
p[4] = p[10] = ifp->ac_enaddr[4];
p += 5;
if ((cksum = plipreceive(bc, ioh, p, 1)) < 0) goto err;
p += 6;
if ((c = plipreceive(bc, ioh, p, len - 11)) < 0) goto err;
cksum += c + sc->sc_adrcksum;
c = p[1]; p[1] = p[2]; p[2] = c;
cksum &= 0xff;
break;
case 0xfd:
if ((cksum = plipreceive(bc, ioh, p, len)) < 0) goto err;
break;
default:
goto err;
}
} else
#endif
{
if (plipreceive(bc, ioh, minibuf, 2) < 0) goto err;
len = (minibuf[1] << 8) | minibuf[0];
if (len > (ifp->if_mtu + ifp->if_hdrlen)) {
log(LOG_NOTICE, "%s: packet > MTU\n", ifp->if_softc);
goto err;
}
if ((cksum = plipreceive(bc, ioh, p, len)) < 0) goto err;
}
if (plipreceive(bc, ioh, minibuf, 1) < 0) goto err;
if (cksum != minibuf[0]) {
log(LOG_NOTICE, "%s: checksum error\n", ifp->if_xname);
goto err;
}
bus_io_write_1(bc, ioh, lpt_data, 0x00);
/* i8255->port_b = 0x00;*/
s = splimp();
if (m = m_devget(sc->sc_ifbuf, len, 0, ifp, NULL)) {
/* We assume that the header fit entirely in one mbuf. */
eh = mtod(m, struct ether_header *);
m->m_pkthdr.len -= sizeof(*eh);
m->m_len -= sizeof(*eh);
m->m_data += sizeof(*eh);
ether_input(ifp, eh, m);
}
splx(s);
sc->sc_ifierrs = 0;
ifp->if_ipackets++;
bus_io_write_1(bc, ioh, lpt_control, PLIP_INTR_ENABLE);
/* i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;*/
return;
err:
bus_io_write_1(bc, ioh, lpt_data, 0x00);
/* i8255->port_b = 0x00;*/
if (sc->sc_ifierrs < PLIPMXERRS) {
bus_io_write_1(bc, ioh, lpt_control, PLIP_INTR_ENABLE);
/* i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;*/
} else {
/* We are not able to send receive anything for now,
* so stop wasting our time and leave the interrupt
* disabled.
*/
if (sc->sc_ifierrs == PLIPMXERRS)
log(LOG_NOTICE, "%s: rx hard error\n", ifp->if_xname);
bus_io_write_1(bc, ioh, lpt_control, PLIP_INTR_ENABLE);
/* i8255->port_a |= LPA_ACTIVE;*/
}
ifp->if_ierrors++;
sc->sc_ifierrs++;
return;
}
static int
pliptransmit(bc, ioh, buf, len)
bus_chipset_tag_t bc;
bus_io_handle_t ioh;
u_char *buf;
int len;
{
int i;
u_char cksum = 0, c;
while (len--) {
i = PLIPMXSPIN2;
cksum += (c = *buf++);
while (((bus_io_read_1(bc, ioh, lpt_status)) & LPS_NBSY) == 0)
if (i-- < 0) return -1;
bus_io_write_1(bc, ioh, lpt_data, (c & 0x0f));
bus_io_write_1(bc, ioh, lpt_data, (c & 0x0f) | 0x10);
c >>= 4;
while (((bus_io_read_1(bc, ioh, lpt_status)) & LPS_NBSY) != 0)
if (i-- < 0) return -1;
bus_io_write_1(bc, ioh, lpt_data, c | 0x10);
bus_io_write_1(bc, ioh, lpt_data, c);
}
return(cksum);
}
/*
* Setup output on interface.
*/
static void
plipstart(struct ifnet *ifp)
{
struct lpt_softc *sc = (struct lpt_softc *)(ifp->if_softc);
sc->sc_pending |= PLIP_OPENDING;
setsoftintr(sc->sc_ifsoftint);
}
static void
plipoutput(struct lpt_softc *sc)
{
struct ifnet *ifp = &sc->sc_arpcom.ac_if;
bus_chipset_tag_t bc = sc->sc_bc;
bus_io_handle_t ioh = sc->sc_ioh;
struct mbuf *m0, *m;
u_char minibuf[4], cksum;
int len, i, s;
if (ifp->if_flags & IFF_OACTIVE)
return;
ifp->if_flags |= IFF_OACTIVE;
if (sc->sc_ifoerrs)
untimeout((void (*)(void *))plipoutput, sc);
for (;;) {
s = splnet();
IF_DEQUEUE(&ifp->if_snd, m0);
splx(s);
if (!m0)
break;
for (len = 0, m = m0; m; m = m->m_next)
len += m->m_len;
#if defined(COMPAT_PLIP10)
if (ifp->if_flags & IFF_LINK0) {
minibuf[0] = 3;
minibuf[1] = 0xfd;
minibuf[2] = len >> 8;
minibuf[3] = len;
} else
#endif
{
minibuf[0] = 2;
minibuf[1] = len;
minibuf[2] = len >> 8;
}
/* Trigger remote interrupt */
i = PLIPMXSPIN1;
do {
if (sc->sc_pending & PLIP_IPENDING) {
bus_io_write_1(bc, ioh, lpt_data, 0x00);
/* i8255->port_b = 0x00;*/
sc->sc_pending = 0;
plipinput(sc);
i = PLIPMXSPIN1;
} else if (i-- < 0)
goto retry;
/* Retrigger remote interrupt */
bus_io_write_1(bc, ioh, lpt_data, PLIP_REMOTE_TRIGGER);
/* i8255->port_b = 0x08;*/
} while ((i8255->port_c & LPC_NERROR) == 0);
/* i8255->port_a &= ~(LPA_ACKENABLE | LPA_ACTIVE);*/
bus_io_write_1(bc, ioh, lpt_control, PLIP_INTR_DISABLE);
if (pliptransmit(bc, ioh, minibuf + 1, minibuf[0]) < 0) goto retry;
for (cksum = 0, m = m0; m; m = m->m_next) {
i = pliptransmit(bc, ioh, mtod(m, u_char *), m->m_len);
if (i < 0) goto retry;
cksum += i;
}
if (pliptransmit(bc, ioh, &cksum, 1) < 0) goto retry;
i = PLIPMXSPIN2;
while (((bus_io_read_1(bc, ioh, lpt_status)) & LPS_NBSY) == 0)
if (i-- < 0) goto retry;
bus_io_write_1(bc, ioh, lpt_data, 0x00);
/* i8255->port_b = 0x00;*/
ifp->if_opackets++;
ifp->if_obytes += len + 4;
sc->sc_ifoerrs = 0;
s = splimp();
m_freem(m0);
splx(s);
i8255->port_a |= LPA_ACKENABLE;
}
i8255->port_a |= LPA_ACTIVE;
ifp->if_flags &= ~IFF_OACTIVE;
return;
retry:
if (i8255->port_c & LPC_NACK)
ifp->if_collisions++;
else
ifp->if_oerrors++;
ifp->if_flags &= ~IFF_OACTIVE;
bus_io_write_1(bc, ioh, lpt_data, 0x00);
/* i8255->port_b = 0x00;*/
if ((ifp->if_flags & (IFF_RUNNING | IFF_UP)) == (IFF_RUNNING | IFF_UP)
&& sc->sc_ifoerrs < PLIPMXRETRY) {
s = splnet();
IF_PREPEND(&ifp->if_snd, m0);
splx(s);
i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;
timeout((void (*)(void *))plipoutput, sc, PLIPRETRY);
} else {
if (sc->sc_ifoerrs == PLIPMXRETRY) {
log(LOG_NOTICE, "%s: tx hard error\n", ifp->if_xname);
}
s = splimp();
m_freem(m0);
splx(s);
i8255->port_a |= LPA_ACTIVE;
}
sc->sc_ifoerrs++;
}
#endif
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