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

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Initial commit of the NetBSD/arm32 port.
1996-02-01 02:14:53 +03:00
/* $NetBSD: lpt.c,v 1.1 1996/01/31 23:24:49 mark Exp $ */
/*
* Copyright (c) 1995 Mark Brinicombe
* 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.
*
* from:$NetBSD: lpt.c,v 1.1 1996/01/31 23:24:49 mark Exp $
* $Id: lpt.c,v 1.1 1996/01/31 23:24:49 mark Exp $
*/
/*
* Device Driver for AT parallel printer port
*/
/*
* PLIP driver code added by Mark Brinicombe
*/
#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/syslog.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>
#include "bpfilter.h"
#if NBPFILTER > 0
#include <sys/time.h>
#include <net/bpf.h>
#endif
#endif
#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>
#define inb ReadByte
#define outb WriteByte
#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(INET) && defined(PLIP)
#ifndef PLIPMTU /* MTU for the plip# interfaces */
#if defined(COMPAT_PLIP10)
#define PLIPMTU 1600
#else
#define PLIPMTU (ETHERMTU - ifp->if_hdrlen)
#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 100
#endif
#ifndef PLIPMXRETRY
#define PLIPMXRETRY 10 /* Max number of retransmits */
#endif
#ifndef PLIPRETRY
#define PLIPRETRY hz/10 /* Time between retransmits */
#endif
#endif
#if !defined(DEBUG) || !defined(notdef)
#define lprintf
#else
#define lprintf if (lptdebug) printf
int lptdebug = 1;
#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;
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_iferrs;
int sc_ifretry;
#if defined(COMPAT_PLIP10)
u_char sc_adrcksum;
#endif
#endif
};
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);
static void plipstart(struct ifnet *);
static int plipintr(struct lpt_softc *);
#endif
struct cfdriver lptcd = {
NULL, "lpt", lptprobe, lptattach, DV_TTY, sizeof(struct lpt_softc)
};
#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() ((inb(iobase + lpt_status) ^ LPS_INVERT) & LPS_MASK)
#define NOT_READY_ERR() not_ready(inb(iobase + 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 *));
/*
* Internal routine to lptprobe to do port tests of one byte value.
*/
int
lpt_port_test(port, data, mask)
int port;
u_char data, mask;
{
int timeout;
u_char temp;
data &= mask;
outb(port, data);
timeout = 1000;
do {
delay(10);
temp = inb(port) & mask;
} while (temp != data && --timeout);
lprintf("lpt: port=0x%x out=0x%x in=0x%x timeout=%d\n", port, 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;
int iobase = mb->mb_iobase;
int port;
u_char mask, data;
int i;
#ifdef DEBUG
#define ABORT do {printf("lptprobe: mask %x data %x failed\n", mask, data); \
return 0;} while (0)
#else
#define ABORT return 0
#endif
port = iobase + lpt_data;
mask = 0xff;
data = 0x55; /* Alternating zeros */
if (!lpt_port_test(port, data, mask))
ABORT;
data = 0xaa; /* Alternating ones */
if (!lpt_port_test(port, data, mask))
ABORT;
for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
data = ~(1 << i);
if (!lpt_port_test(port, data, mask))
ABORT;
}
for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
data = (1 << i);
if (!lpt_port_test(port, data, mask))
ABORT;
}
outb(iobase + lpt_data, 0);
outb(iobase + lpt_control, 0);
mb->mb_iosize = LPT_NPORTS;
return 1;
}
void
lptattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct lpt_softc *sc = (void *)self;
struct mainbus_attach_args *mb = aux;
int iobase = mb->mb_iobase;
if (mb->mb_irq != IRQUNK)
printf("\n");
else
printf(": polled\n");
sc->sc_iobase = iobase;
sc->sc_irq = mb->mb_irq;
sc->sc_state = 0;
outb(iobase + lpt_control, LPC_NINIT);
if (mb->mb_irq != IRQUNK) {
sc->sc_ih.ih_func = lptintr;
sc->sc_ih.ih_arg = sc;
#if defined(INET) && defined(PLIP)
sc->sc_ih.ih_level = IPL_NET;
plipattach(sc, self->dv_unit);
#else
sc->sc_ih.ih_level = IPL_NONE;
#endif
irq_claim(mb->mb_irq, &sc->sc_ih);
}
#if defined(INET) && defined(PLIP)
else {
printf("Warning PLIP device needs IRQ driven lpt driver\n");
}
#endif
}
/*
* Reset the printer, then wait until it's selected and not busy.
*/
int
lptopen(dev, flag)
dev_t dev;
int flag;
{
int unit = LPTUNIT(dev);
u_char flags = LPTFLAGS(dev);
struct lpt_softc *sc;
int iobase;
u_char control;
int error;
int spin;
if (unit >= lptcd.cd_ndevs)
return ENXIO;
sc = lptcd.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);
iobase = sc->sc_iobase;
if ((flags & LPT_NOPRIME) == 0) {
/* assert INIT for 100 usec to start up printer */
outb(iobase + lpt_control, LPC_SELECT);
delay(100);
}
control = LPC_SELECT | LPC_NINIT;
outb(iobase + 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 */
if (error = tsleep((caddr_t)sc, LPTPRI | PCATCH, "lptopen",
STEP) != 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;
outb(iobase + 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.
*/
lptclose(dev, flag)
dev_t dev;
int flag;
{
int unit = LPTUNIT(dev);
struct lpt_softc *sc = lptcd.cd_devs[unit];
int iobase = sc->sc_iobase;
if (sc->sc_count)
(void) pushbytes(sc);
if ((sc->sc_flags & LPT_NOINTR) == 0)
untimeout(lptwakeup, sc);
outb(iobase + lpt_control, LPC_NINIT);
sc->sc_state = 0;
outb(iobase + 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;
{
int iobase = sc->sc_iobase;
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;
}
outb(iobase + lpt_data, *sc->sc_cp++);
outb(iobase + lpt_control, control | LPC_STROBE);
sc->sc_count--;
outb(iobase + 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);
}
if (error = tsleep((caddr_t)sc, LPTPRI | PCATCH,
"lptwrite2", 0))
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.
*/
lptwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
struct lpt_softc *sc = lptcd.cd_devs[LPTUNIT(dev)];
size_t n;
int error = 0;
while (n = min(LPT_BSIZE, uio->uio_resid)) {
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;
int iobase = sc->sc_iobase;
printf("lptintr:\n");
#if defined(INET) && defined(PLIP)
if (sc->sc_arpcom.ac_if.if_flags & IFF_UP) {
return(plipintr(sc));
}
#endif
#if 0
if ((sc->sc_state & LPT_OPEN) == 0)
return 0;
#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 */
outb(iobase + lpt_data, *sc->sc_cp++);
outb(iobase + lpt_control, control | LPC_STROBE);
sc->sc_count--;
outb(iobase + 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);
}
int
lptioctl(dev, cmd, data, flag)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
{
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 (iobase + lpt_data)
#define PLIP_STATUS (iobase + lpt_status)
#define PLIP_CONTROL (iobase + 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;
ifp->if_unit = unit;
ifp->if_name = "plip";
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;
if_attach(ifp);
ether_ifattach(ifp);
printf("plip%d at lpt%d: mtu=%d,%d,%d", unit, unit, (int) ifp->if_mtu,
ifp->if_hdrlen, ifp->if_addrlen);
if (sizeof(struct ether_header) != 14)
printf(" ethhdr super kludge mode enabled\n");
else
printf("\n");
#if NBPFILTER > 0
bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
}
/*
* 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 *) lptcd.cd_devs[ifp->if_unit];
unsigned int iobase = sc->sc_iobase;
struct ifaddr *ifa = (struct ifaddr *)data;
struct ifreq *ifr = (struct ifreq *)data;
int s;
int error = 0;
#if PLIP_DEBUG > 0
printf("plipioctl: cmd=%08x ifp=%08x data=%08x\n", cmd, ifp, 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
outb(PLIP_DATA, 0x00);
outb(PLIP_CONTROL, PLIP_INTR_DISABLE);
sc->sc_state = 0;
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 (!(ifp->if_flags & IFF_DEBUG))
plip_debug = PLIP_DEBUG;
else
plip_debug = 0;*/
sc->sc_state = LPT_OPEN | LPT_PLIP;
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
outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
outb(PLIP_DATA, 0x00);
}
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);
sc->sc_arpcom.ac_ipaddr = IA_SIN(ifa)->sin_addr;
#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
outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
outb(PLIP_DATA, 0x00);
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_metric) {
ifp->if_mtu = ifr->ifr_metric;
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;
case SIOCGIFMTU:
ifr->ifr_metric = ifp->if_mtu;
break;
default:
error = EINVAL;
}
return (error);
}
static int
plipreceive(unsigned int iobase, u_char *buf, int len)
{
int i;
u_char cksum = 0, c;
u_char c0, c1;
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_RX)
printf("Rx: ");
#endif
while (len--) {
i = PLIPMXSPIN2;
/* Receive a byte */
/* Wait for a steady handshake */
while (1) {
c0 = inb(PLIP_STATUS);
if ((c0 & LPS_NBSY) == 0) {
c1 = inb(PLIP_STATUS);
if (c0 == c1) break;
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_RX)
printf("rx: %02x-%02x ", c0, c1);
#endif
}
--i;
if (i < 0) {
#if PLIP_DEBUG > 0
printf("timeout rx lsn %02x\n", c0);
#endif
return(-1);
}
PLIP_DELAY;
}
c = (c0 >> 3) & 0x0f;
/* Acknowledge */
outb(PLIP_DATA, 0x10);
/* Another handshake */
i = PLIPMXSPIN2;
while (1) {
c0 = inb(PLIP_STATUS);
if (c0 & LPS_NBSY) {
c1 = inb(PLIP_STATUS);
if (c0 == c1) break;
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_RX)
printf("rx: %02x-%02x ", c0, c1);
#endif
}
--i;
if (i < 0) {
#if PLIP_DEBUG > 0
printf("timeout rx msn %02x\n", c0);
#endif
return(-1);
}
PLIP_DELAY;
}
c = c | ((c0 << 1) & 0xf0);
/* Acknowledge */
outb(PLIP_DATA, 0x00);
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_RX)
printf("%02x ", c);
#endif
cksum += (*buf++ = c);
}
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_RX)
printf("\n");
#endif
return(cksum);
}
static int
plipintr(struct lpt_softc *sc)
{
extern struct mbuf *m_devget(char *, int, int, struct ifnet *, void (*)());
struct ifnet *ifp = &sc->sc_arpcom.ac_if;
unsigned int iobase = sc->sc_iobase;
struct mbuf *m;
struct ether_header *eh;
u_char *p = sc->sc_ifbuf, minibuf[4];
int c, s, len, cksum;
u_char c0;
printf("plipintr:\n");
/* Get the status */
c0 = inb(PLIP_STATUS);
#if PLIP_DEBUG > 0
if ((c0 & 0xf8) != 0xc0) {
printf("st5=%02x ", c0);
}
#endif
/* Don't want ints while receiving */
outb(PLIP_CONTROL, PLIP_INTR_DISABLE);
outb(PLIP_DATA, 0x01); /* send ACK */ /* via NERR */
#if defined(COMPAT_PLIP10)
if (ifp->if_flags & IFF_LINK0) {
if (plipreceive(iobase, 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(iobase, p, 1)) < 0) goto err;
p += 6;
if ((c = plipreceive(iobase, 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(iobase, p, len)) < 0) goto err;
break;
default:
goto err;
}
} else
#endif
{
if (plipreceive(iobase, minibuf, 2) < 0) goto err;
len = (minibuf[1] << 8) | minibuf[0];
if (len > (ifp->if_mtu + ifp->if_hdrlen)) {
log(LOG_NOTICE, "plip%d: packet > MTU\n", ifp->if_unit);
goto err;
}
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_RX)
printf("len=%d ", len);
#endif
if (sizeof(struct ether_header) != 14) {
if ((cksum = plipreceive(iobase, p, 14)) < 0) goto err;
if ((c = plipreceive(iobase, p+16, len-14)) < 0) goto err;
cksum += c;
len += 2;
}
else
if ((cksum = plipreceive(iobase, p, len)) < 0) goto err;
}
if (plipreceive(iobase, minibuf, 1) < 0) goto err;
if ((cksum & 0xff) != minibuf[0]) {
printf("cksum=%d, %d, %d\n", cksum, c, minibuf[0]);
log(LOG_NOTICE, "plip%d: checksum error\n", ifp->if_unit);
goto err;
}
outb(PLIP_DATA, 0x00); /* clear ACK */ /* via NERR */
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_RX)
printf("done\n");
#endif
s = splimp();
eh = (struct ether_header *)sc->sc_ifbuf;
if ((m = m_devget(sc->sc_ifbuf + sizeof(struct ether_header), len - sizeof(struct ether_header), 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);*/
/* printf("m->m_data=%08x ifbuf=%08x eh=%08x\n", m->m_data, sc->sc_ifbuf, eh);*/
#if NBPFILTER > 0
/*
* Check if there's a BPF listener on this interface.
* If so, hand off the raw packet to bpf.
*/
if (sc->sc_arpcom.ac_if.if_bpf) {
bpf_mtap(sc->sc_arpcom.ac_if.if_bpf, m);
}
#endif
ether_input(ifp, eh, m);
}
splx(s);
sc->sc_iferrs = 0;
ifp->if_ipackets++;
/* Allow ints again */
outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
return(1);
err:
outb(PLIP_DATA, 0x00); /* clear ACK */ /* via NERR */
ifp->if_ierrors++;
sc->sc_iferrs++;
if (sc->sc_iferrs > PLIPMXERRS
|| (sc->sc_iferrs > 5 && (inb(iobase + lpt_status) & LPS_NBSY))) {
/* We are not able to send receive anything for now,
* so stop wasting our time and leave the interrupt
* disabled.
*/
if (sc->sc_iferrs == PLIPMXERRS + 1)
log(LOG_NOTICE, "plip%d: rx hard error\n", ifp->if_unit);
/* xxx i8255->port_a |= LPA_ACTIVE;*/
} else
;
/* xxx i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;*/
/* Allow ints again */
outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
return(1);
}
static int
pliptransmit(unsigned int iobase, u_char *buf, int len)
{
int i;
u_char cksum = 0, c;
u_char c0;
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_TX)
printf("tx: len=%d ", len);
#endif
while (len--) {
i = PLIPMXSPIN2;
cksum += (c = *buf++);
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_TX)
printf("%02x ", c);
#endif
/* xxx while ((i8255->port_c & LPC_NBUSY) == 0)
if (i-- < 0) return -1;
i8255->port_b = c & 0x0f;
i8255->port_b = c & 0x0f | 0x10;
c >>= 4;
while ((i8255->port_c & LPC_NBUSY) != 0)
if (i-- < 0) return -1;
i8255->port_b = c | 0x10;
i8255->port_b = c;
*/
/* Send the nibble + handshake */
outb(PLIP_DATA, 0x00 | (c & 0x0f));
outb(PLIP_DATA, 0x10 | (c & 0x0f));
while (1) {
c0 = inb(PLIP_STATUS);
if ((c0 & LPS_NBSY) == 0)
break;
if (--i == 0) { /* time out */
#if PLIP_DEBUG > 0
printf("timeout tx lsn %02x ", c0);
#endif
return(-1);
}
PLIP_DELAY;
}
outb(PLIP_DATA, 0x10 | (c >> 4));
outb(PLIP_DATA, 0x00 | (c >> 4));
i = PLIPMXSPIN2;
while (1) {
c0 = inb(PLIP_STATUS);
if ((c0 & LPS_NBSY) != 0)
break;
if (--i == 0) { /* time out */
#if PLIP_DEBUG > 0
printf("timeout tx msn %02x ", c0);
#endif
return(-1);
}
PLIP_DELAY;
}
}
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_TX)
printf("done\n");
#endif
return(cksum);
}
/*
* Setup output on interface.
*/
static void
plipstart(struct ifnet *ifp)
{
struct lpt_softc *sc = (struct lpt_softc *) lptcd.cd_devs[ifp->if_unit];
unsigned int iobase = sc->sc_iobase;
struct mbuf *m0, *m;
u_char minibuf[4], cksum;
int len, i, s;
u_char *p;
#if PLIP_DEBUG != 0
if (plip_debug & PLIP_DEBUG_TX)
printf("plipstart: ");
#endif
if (ifp->if_flags & IFF_OACTIVE)
return;
ifp->if_flags |= IFF_OACTIVE;
if (sc->sc_ifretry)
untimeout((void (*)(void *))plipstart, ifp);
for (;;) {
s = splimp();
IF_DEQUEUE(&ifp->if_snd, m0);
splx(s);
if (!m0)
break;
for (len = 0, m = m0; m; m = m->m_next) {
#if PLIP_DEBUG > 0
if (plip_debug & PLIP_DEBUG_TX)
printf("len=%d %d\n", m->m_len, len);
#endif
len += m->m_len;
}
#if NBPFILTER > 0
p = sc->sc_ifbuf;
for (m = m0; m; m = m->m_next) {
if (m->m_len == 0)
continue;
bcopy(mtod(m, u_char *), p, m->m_len);
p += m->m_len;
}
if (sc->sc_arpcom.ac_if.if_bpf)
bpf_tap(sc->sc_arpcom.ac_if.if_bpf, sc->sc_ifbuf, len);
#endif
if (sizeof(struct ether_header) != 14)
len -= 2;
#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;
}
/*yyy for (i = PLIPMXSPIN1; (inb(PLIP_STATUS) & LPS_NERR) != 0; i--)
if (i < 0) goto retry;*/
/* Trigger remote interrupt */
#if PLIP_DEBUG > 0
if (plip_debug & PLIP_DEBUG_TX)
printf("st=%02x ", inb(PLIP_STATUS));
#endif
if (inb(PLIP_STATUS) & LPS_NERR) {
for (i = PLIPMXSPIN1; (inb(PLIP_STATUS) & LPS_NERR) != 0; i--)
PLIP_DELAY;
#if PLIP_DEBUG > 0
if (plip_debug & PLIP_DEBUG_TX)
printf("st1=%02x ", inb(PLIP_STATUS));
#endif
}
outb(PLIP_DATA, PLIP_REMOTE_TRIGGER);
for (i = PLIPMXSPIN1; (inb(PLIP_STATUS) & LPS_NERR) == 0; i--) {
if (i < 0 || (i > PLIPMXSPIN1/3
&& inb(PLIP_STATUS) & LPS_NACK)) {
#if PLIP_DEBUG > 0
printf("trigger ack timeout\n");
#endif
goto retry;
}
PLIP_DELAY;
}
#if PLIP_DEBUG > 0
if (plip_debug & PLIP_DEBUG_TX)
printf("st3=%02x ", inb(PLIP_STATUS));
#endif
/* Don't want ints while transmitting */
outb(PLIP_CONTROL, PLIP_INTR_DISABLE);
if (pliptransmit(iobase, minibuf + 1, minibuf[0]) < 0) goto retry;
for (cksum = 0, m = m0; m; m = m->m_next) {
if (sizeof(struct ether_header) != 14 && m == m0) {
i = pliptransmit(iobase, mtod(m, u_char *), 14);
if (i < 0) goto retry;
cksum += i;
i = pliptransmit(iobase, mtod(m, u_char *)+16, m->m_len-16);
if (i < 0) goto retry;
}
else
i = pliptransmit(iobase, mtod(m, u_char *), m->m_len);
if (i < 0) goto retry;
cksum += i;
}
if (pliptransmit(iobase, &cksum, 1) < 0) goto retry;
i = PLIPMXSPIN2;
while ((inb(PLIP_STATUS) & LPS_NBSY) == 0)
if (i-- < 0) goto retry;
outb(iobase + lpt_data, 0x00);
/* Re-enable ints */
outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
ifp->if_opackets++;
ifp->if_obytes += len + 4;
sc->sc_ifretry = 0;
s = splimp();
m_freem(m0);
splx(s);
}
ifp->if_flags &= ~IFF_OACTIVE;
return;
retry:
#if PLIP_DEBUG > 0
if (plip_debug & PLIP_DEBUG_TX)
printf("retry: %02x", inb(iobase + lpt_status));
#endif
if (inb(PLIP_STATUS & LPS_NACK))
ifp->if_collisions++;
else
ifp->if_oerrors++;
if ((ifp->if_flags & (IFF_RUNNING | IFF_UP)) == (IFF_RUNNING | IFF_UP)
&& sc->sc_ifretry < PLIPMXRETRY) {
sc->sc_ifretry++;
s = splimp();
IF_PREPEND(&ifp->if_snd, m0);
splx(s);
timeout((void (*)(void *))plipstart, ifp, PLIPRETRY);
} else {
if (sc->sc_ifretry == PLIPMXRETRY) {
sc->sc_ifretry++;
log(LOG_NOTICE, "plip%d: tx hard error\n", ifp->if_unit);
}
s = splimp();
m_freem(m0);
splx(s);
}
ifp->if_flags &= ~IFF_OACTIVE;
outb(PLIP_DATA, 0x00);
/* Re-enable ints */
outb(PLIP_CONTROL, PLIP_INTR_ENABLE);
/*xxx if (sc->sc_iferrs > PLIPMXERRS)
i8255->port_a |= LPA_ACTIVE;
else
i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;*/
return;
}
#endif