1082 lines
24 KiB
C
1082 lines
24 KiB
C
/* $NetBSD: lpt.c,v 1.31 2000/03/23 06:42:33 thorpej Exp $ */
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/*
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* Copyright (c) 1994 Matthias Pfaller.
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* Copyright (c) 1994 Poul-Henning Kamp
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* Copyright (c) 1993, 1994 Charles M. Hannum.
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* Copyright (c) 1990 William F. Jolitz, TeleMuse
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This software is a component of "386BSD" developed by
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* William F. Jolitz, TeleMuse.
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* 4. Neither the name of the developer nor the name "386BSD"
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
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* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
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* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
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* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
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* NOT MAKE USE OF THIS WORK.
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*
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* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
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* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
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* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
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* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
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* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
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* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
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* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
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* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
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*/
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/*
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* Device Driver for Matthias's parallel printer port.
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* This driver is based on the i386 lpt driver and
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* some IP code from Poul-Henning Kamp.
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*/
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#include "opt_inet.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/buf.h>
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#include <sys/kernel.h>
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#include <sys/ioctl.h>
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#include <sys/uio.h>
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#include <sys/device.h>
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#include <sys/syslog.h>
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#include <sys/malloc.h>
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#include <machine/autoconf.h>
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#include <machine/conf.h>
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#if defined(INET) && defined(PLIP)
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#include "bpfilter.h"
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/if_ether.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/if_inarp.h>
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#if NBPFILTER > 0
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#include <sys/time.h>
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#include <net/bpf.h>
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#endif
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#endif
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#include "lpt.h"
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#include "lptreg.h"
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#define LPT_INVERT (LPC_NBUSY|LPC_NERROR|LPC_NACK|LPC_ONLINE)
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#define LPT_MASK (LPC_NBUSY|LPC_NERROR|LPC_NACK|LPC_NOPAPER|LPC_ONLINE)
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#define TIMEOUT hz*16 /* wait up to 16 seconds for a ready */
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#define STEP hz/4
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#define LPTPRI (PZERO+8)
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#define LPT_BSIZE 1024
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#if defined(INET) && defined(PLIP)
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#ifndef PLIPMTU /* MTU for the plip# interfaces */
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#if defined(COMPAT_PLIP10)
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#define PLIPMTU 1600 /* Linux 1.0.x */
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#elif defined(COMPAT_PLIP11)
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#define PLIPMTU (ETHERMTU - ifp->if_hdrlen) /* Linux 1.1.x */
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#else
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#define PLIPMTU ETHERMTU /* Linux 1.3.x */
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#endif
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#endif
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#ifndef PLIPMXSPIN1 /* DELAY factor for the plip# interfaces */
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#define PLIPMXSPIN1 50000 /* Spinning for remote intr to happen */
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#endif
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#ifndef PLIPMXSPIN2 /* DELAY factor for the plip# interfaces */
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#define PLIPMXSPIN2 50000 /* Spinning for remote handshake to happen */
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#endif
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#ifndef PLIPMXERRS /* Max errors before !RUNNING */
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#define PLIPMXERRS 20
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#endif
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#ifndef PLIPMXRETRY
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#define PLIPMXRETRY 20 /* Max number of retransmits */
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#endif
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#ifndef PLIPRETRY
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#define PLIPRETRY hz/50 /* Time between retransmits */
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#endif
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#endif
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struct lpt_softc {
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struct device sc_dev;
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size_t sc_count;
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u_char *sc_inbuf;
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u_char *sc_cp;
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volatile struct i8255 *sc_i8255;
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int sc_irq;
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u_char sc_state;
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#define LPT_OPEN 0x01 /* device is open */
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#define LPT_INIT 0x02 /* waiting to initialize for open */
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u_char sc_status;
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u_char sc_flags;
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#define LPT_AUTOLF 0x20 /* automatic LF on CR */
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#define LPT_NOPRIME 0x40 /* don't prime on open */
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struct callout sc_out_ch;
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#if defined(INET) && defined(PLIP)
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struct ethercom sc_ethercom;
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struct callout sc_plipout_ch;
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struct callout sc_pliprx_ch;
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u_char *sc_ifbuf;
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int sc_ifierrs; /* consecutive input errors */
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int sc_ifoerrs; /* consecutive output errors */
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int sc_ifsoftint; /* i/o software interrupt */
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volatile int sc_pending; /* interrputs pending */
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#define PLIP_IPENDING 1
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#define PLIP_OPENDING 2
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#if defined(COMPAT_PLIP10)
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u_char sc_adrcksum;
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#endif
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#endif
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};
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#define LPTUNIT(s) (minor(s) & 0x1f)
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#define LPTFLAGS(s) (minor(s) & 0xe0)
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#define LPTSOFTC(n) ((struct lpt_softc *) lpt_cd.cd_devs[n])
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static int lptmatch __P((struct device *, struct cfdata *, void *aux));
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static void lptattach __P((struct device *, struct device *, void *));
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static void lptintr __P((void *));
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static int notready __P((u_char, struct lpt_softc *));
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static void lptout __P((void *));
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static int pushbytes __P((struct lpt_softc *));
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#if defined(INET) && defined(PLIP)
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/* Functions for the plip# interface */
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static void plipattach __P((struct lpt_softc *,int));
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static void plipinput __P((struct lpt_softc *));
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static int plipioctl __P((struct ifnet *, u_long, caddr_t));
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static void plipoutput __P((void *));
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#ifndef __OPTIMIZE__
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static
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#endif
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int plipreceive __P((volatile struct i8255 *, u_char *, int));
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static void pliprxenable __P((void *));
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static void plipsoftint __P((void *));
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static void plipstart __P((struct ifnet *));
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#ifndef __OPTIMIZE__
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static
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#endif
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int pliptransmit __P((volatile struct i8255 *, u_char *, int));
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#endif
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struct cfattach lpt_ca = {
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sizeof(struct lpt_softc), lptmatch, lptattach
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};
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extern struct cfdriver lpt_cd;
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static int
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lptmatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct confargs *ca = aux;
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volatile struct i8255 *i8255 =
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(volatile struct i8255 *)((struct cfdata *)cf)->cf_addr;
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int unit = ((struct cfdata *)cf)->cf_unit;
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if (unit >= LPT_MAX)
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return(0);
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if ((int) i8255 == -1)
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i8255 = LPT_ADR(unit);
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i8255->port_control = LPT_PROBE_MODE;
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i8255->port_control = LPT_PROBE_CLR;
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if ((i8255->port_c & LPT_PROBE_MASK) != 0)
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return 0;
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i8255->port_control = LPT_PROBE_SET;
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if ((i8255->port_c & LPT_PROBE_MASK) == 0)
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return 0;
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i8255->port_control = LPT_PROBE_CLR;
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if ((i8255->port_c & LPT_PROBE_MASK) != 0)
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return 0;
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i8255->port_control = LPT_MODE;
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i8255->port_a = LPA_ACTIVE | LPA_NPRIME;
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ca->ca_addr = (int)i8255;
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if (ca->ca_irq == -1)
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ca->ca_irq = LPT_IRQ(unit);
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return 1;
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}
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static void
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lptattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct confargs *ca = aux;
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struct lpt_softc *sc = (struct lpt_softc *) self;
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volatile struct i8255 *i8255;
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printf("\n");
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sc->sc_irq = ca->ca_irq;
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i8255 = (volatile struct i8255 *)ca->ca_addr;
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i8255->port_control = LPT_MODE;
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i8255->port_a = LPA_ACTIVE | LPA_NPRIME;
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i8255->port_control = LPT_IRQDISABLE;
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sc->sc_state = 0;
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sc->sc_i8255 = i8255;
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callout_init(&sc->sc_out_ch);
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#if defined(INET) && defined(PLIP)
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plipattach(sc, self->dv_unit);
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#endif
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intr_establish(sc->sc_irq, lptintr, sc, sc->sc_dev.dv_xname,
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IPL_ZERO, IPL_ZERO, LOW_LEVEL);
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}
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/*
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* Reset the printer, then wait until it's selected and not busy.
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*/
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int
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lptopen(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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struct lpt_softc *sc;
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volatile struct i8255 *i8255;
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u_char flags = LPTFLAGS(dev);
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int error;
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int spin;
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if (LPTUNIT(dev) >= lpt_cd.cd_ndevs)
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return ENXIO;
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sc = LPTSOFTC(LPTUNIT(dev));
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if (!sc)
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return ENXIO;
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if (sc->sc_state)
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return EBUSY;
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i8255 = sc->sc_i8255;
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#if defined(INET) && defined(PLIP)
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if (sc->sc_ethercom.ec_if.if_flags & IFF_UP)
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return EBUSY;
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#endif
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sc->sc_state = LPT_INIT;
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sc->sc_flags = flags;
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if ((flags & LPT_NOPRIME) == 0) {
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/* assert INIT for 100 usec to start up printer */
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i8255->port_a &= ~LPA_NPRIME;
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DELAY(100);
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}
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if (flags & LPT_AUTOLF)
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i8255->port_a |= LPA_ALF | LPA_SELECT | LPA_NPRIME;
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else
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i8255->port_a = (i8255->port_a & ~LPA_ALF)
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| LPA_SELECT | LPA_NPRIME;
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/* wait till ready (printer running diagnostics) */
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for (spin = 0; notready(i8255->port_c, sc); spin += STEP) {
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if (spin >= TIMEOUT) {
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sc->sc_state = 0;
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return EBUSY;
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}
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/* wait 1/4 second, give up if we get a signal */
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error = tsleep((caddr_t)sc, LPTPRI | PCATCH, "lptopen", STEP);
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if (error != EWOULDBLOCK) {
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sc->sc_state = 0;
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return error;
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}
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}
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sc->sc_inbuf = malloc(LPT_BSIZE, M_DEVBUF, M_WAITOK);
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sc->sc_status =
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sc->sc_count = 0;
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sc->sc_state = LPT_OPEN;
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return 0;
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}
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static int
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notready(status, sc)
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u_char status;
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struct lpt_softc *sc;
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{
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status ^= LPT_INVERT;
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if (status != sc->sc_status) {
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if (status & LPC_NOPAPER)
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log(LOG_NOTICE, "%s: out of paper\n", sc->sc_dev.dv_xname);
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if (status & LPC_ONLINE)
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log(LOG_NOTICE, "%s: offline\n", sc->sc_dev.dv_xname);
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if (status & LPC_NERROR)
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log(LOG_NOTICE, "%s: output error\n", sc->sc_dev.dv_xname);
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if (status & LPC_NACK)
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log(LOG_NOTICE, "%s: NACK low\n", sc->sc_dev.dv_xname);
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if (status & LPC_NBUSY)
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log(LOG_NOTICE, "%s: NBUSY low\n", sc->sc_dev.dv_xname);
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sc->sc_status = status;
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}
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return status & LPT_MASK;
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}
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static void
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lptout(arg)
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void *arg;
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{
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struct lpt_softc *sc = arg;
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if (sc->sc_count > 0)
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sc->sc_i8255->port_control = LPT_IRQENABLE;
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}
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/*
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* Close the device, and free the local line buffer.
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*/
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int
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lptclose(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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struct lpt_softc *sc = LPTSOFTC(LPTUNIT(dev));
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if (sc->sc_count)
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(void) pushbytes(sc);
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sc->sc_i8255->port_control = LPT_IRQDISABLE;
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sc->sc_state = 0;
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free(sc->sc_inbuf, M_DEVBUF);
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return 0;
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}
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static int
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pushbytes(sc)
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struct lpt_softc *sc;
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{
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volatile struct i8255 *i8255 = sc->sc_i8255;
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int error;
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while (sc->sc_count > 0) {
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i8255->port_control = LPT_IRQENABLE;
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error = tsleep((caddr_t)sc, LPTPRI | PCATCH, "lptwrite", 0);
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if (error != 0)
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return error;
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}
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return 0;
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}
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/*
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* Copy a line from user space to a local buffer, then call pushbytes to
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* get the chars moved to the output queue.
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*/
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int
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lptwrite(dev, uio, flags)
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dev_t dev;
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struct uio *uio;
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int flags;
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{
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struct lpt_softc *sc = LPTSOFTC(LPTUNIT(dev));
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size_t n;
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int error = 0;
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if (sc->sc_count) return EBUSY;
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while ((n = min(LPT_BSIZE, uio->uio_resid)) != 0) {
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uiomove(sc->sc_cp = sc->sc_inbuf, n, uio);
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sc->sc_count = n;
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error = pushbytes(sc);
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if (error) {
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/*
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* Return accurate residual if interrupted or timed
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* out.
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*/
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uio->uio_resid += sc->sc_count;
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sc->sc_count = 0;
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return error;
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}
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}
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return 0;
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}
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/*
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* Handle printer interrupts which occur when the printer is ready to accept
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* another char.
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*/
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static void
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lptintr(arg)
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void *arg;
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{
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struct lpt_softc *sc = arg;
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volatile struct i8255 *i8255 = sc->sc_i8255;
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#if defined(INET) && defined(PLIP)
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if (sc->sc_ethercom.ec_if.if_flags & IFF_UP) {
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i8255->port_a &= ~LPA_ACKENABLE;
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sc->sc_pending |= PLIP_IPENDING;
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softintr(sc->sc_ifsoftint);
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return;
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}
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#endif
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if ((sc->sc_state & LPT_OPEN) == 0) {
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i8255->port_control = LPT_IRQDISABLE;
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return;
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}
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if (sc->sc_count) {
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/* is printer online and ready for output? */
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if (notready(i8255->port_c, sc)) {
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i8255->port_control = LPT_IRQDISABLE;
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callout_reset(&sc->sc_out_ch, STEP, lptout, sc);
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return;
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}
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/* send char */
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i8255->port_a &= ~LPA_ACTIVE;
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i8255->port_b = *sc->sc_cp++;
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i8255->port_a |= LPA_ACTIVE;
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sc->sc_count--;
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}
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if (sc->sc_count == 0) {
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/* none, wake up the top half to get more */
|
|
i8255->port_control = LPT_IRQDISABLE;
|
|
wakeup((caddr_t)sc);
|
|
}
|
|
}
|
|
|
|
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 = EINVAL;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
#if defined(INET) && defined(PLIP)
|
|
|
|
static void
|
|
plipattach(sc, unit)
|
|
struct lpt_softc *sc;
|
|
int unit;
|
|
{
|
|
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
|
|
u_int8_t myaddr[ETHER_ADDR_LEN];
|
|
|
|
callout_init(&sc->sc_plipout_ch);
|
|
callout_init(&sc->sc_pliprx_ch);
|
|
|
|
sc->sc_ifbuf = NULL;
|
|
sprintf(ifp->if_xname, "plip%d", unit);
|
|
memset(myaddr, 0, sizeof(myaddr));
|
|
ifp->if_softc = sc;
|
|
ifp->if_start = plipstart;
|
|
ifp->if_ioctl = plipioctl;
|
|
ifp->if_watchdog = 0;
|
|
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS;
|
|
|
|
if_attach(ifp);
|
|
ether_ifattach(ifp, myaddr);
|
|
ifp->if_mtu = PLIPMTU;
|
|
|
|
#if NBPFILTER > 0
|
|
bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
|
|
#endif
|
|
sc->sc_ifsoftint = intr_establish(SOFTINT, plipsoftint, sc,
|
|
sc->sc_dev.dv_xname, IPL_NET, IPL_ZERO, 0);
|
|
}
|
|
|
|
/*
|
|
* Process an ioctl request.
|
|
*/
|
|
static int
|
|
plipioctl(ifp, cmd, data)
|
|
struct ifnet *ifp;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
{
|
|
struct proc *p = curproc;
|
|
struct lpt_softc *sc = (struct lpt_softc *)(ifp->if_softc);
|
|
volatile struct i8255 *i8255 = sc->sc_i8255;
|
|
struct ifaddr *ifa = (struct ifaddr *)data;
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
struct sockaddr_dl *sdl;
|
|
int error = 0;
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFFLAGS:
|
|
if (((ifp->if_flags & IFF_UP) == 0) &&
|
|
(ifp->if_flags & IFF_RUNNING)) {
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
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;
|
|
sc->sc_i8255->port_control = LPT_IRQDISABLE;
|
|
sc->sc_i8255->port_b = 0;
|
|
sc->sc_i8255->port_a |= LPA_ACKENABLE;
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFADDR:
|
|
sdl = ifp->if_sadl;
|
|
if (ifa->ifa_addr->sa_family == AF_INET) {
|
|
if (!sc->sc_ifbuf)
|
|
sc->sc_ifbuf =
|
|
malloc(PLIPMTU + ifp->if_hdrlen,
|
|
M_DEVBUF, M_WAITOK);
|
|
LLADDR(sdl)[0] = 0xfc;
|
|
LLADDR(sdl)[1] = 0xfc;
|
|
memcpy((caddr_t)&LLADDR(sdl)[2],
|
|
(caddr_t)&IA_SIN(ifa)->sin_addr, 4);
|
|
#if defined(COMPAT_PLIP10)
|
|
if (ifp->if_flags & IFF_LINK0) {
|
|
int i;
|
|
LLADDR(sdl)[0] = 0xfd;
|
|
LLADDR(sdl)[1] = 0xfd;
|
|
for (i = sc->sc_adrcksum = 0; i < 5; i++)
|
|
sc->sc_adrcksum += LLADDR(sdl)[i];
|
|
sc->sc_adrcksum *= 2;
|
|
}
|
|
#endif
|
|
ifp->if_flags |= IFF_RUNNING | IFF_UP;
|
|
sc->sc_i8255->port_control = LPT_IRQDISABLE;
|
|
sc->sc_i8255->port_b = 0;
|
|
sc->sc_i8255->port_a |= LPA_ACKENABLE;
|
|
arp_ifinit(ifp, 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) {
|
|
free(sc->sc_ifbuf, M_DEVBUF);
|
|
sc->sc_ifbuf =
|
|
malloc(ifp->if_mtu + ifp->if_hdrlen,
|
|
M_DEVBUF, M_WAITOK);
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
plipsoftint(arg)
|
|
void *arg;
|
|
{
|
|
struct lpt_softc *sc = arg;
|
|
int 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);
|
|
}
|
|
|
|
#ifdef __OPTIMIZE__
|
|
int plipreceive __P((volatile struct i8255 *, u_char *, int))
|
|
__asm("plipreceive");
|
|
__asm("
|
|
plipreceive:
|
|
enter [r3,r4,r5,r6,r7],0
|
|
movqd 0,r0
|
|
movd 8(fp),r1
|
|
movd 12(fp),r2
|
|
movd 16(fp),r3
|
|
cmpqd 0,r3
|
|
beq 5f
|
|
|
|
movqd 0,r7
|
|
movd 50000,r4
|
|
|
|
.align 2,0xa2
|
|
0: movb 8,r5
|
|
1: movb 2(r1),r6
|
|
andb r6,r5
|
|
cmpqb 0,r5
|
|
beq 2f
|
|
acbd -1,r4,1b
|
|
br 6f
|
|
|
|
.align 2,0xa2
|
|
2: movb 0x11,1(r1)
|
|
lshb -4,r6
|
|
addd r7,r0
|
|
addqd 1,r2
|
|
|
|
movb 8,r5
|
|
3: movb 2(r1),r7
|
|
bicb r7,r5
|
|
cmpqb 0,r5
|
|
beq 4f
|
|
acbd -1,r4,3b
|
|
br 6f
|
|
|
|
.align 2,0xa2
|
|
4: movqb 0x01,1(r1)
|
|
andb 0xf0,r7
|
|
orb r6,r7
|
|
movb r7,-1(r2)
|
|
acbd -1,r3,0b
|
|
|
|
addd r7,r0
|
|
andd 0xff,r0
|
|
5: exit [r3,r4,r5,r6,r7]
|
|
ret 0
|
|
|
|
6: movqd -1,r0
|
|
exit [r3,r4,r5,r6,r7]
|
|
ret 0
|
|
");
|
|
#else
|
|
static int
|
|
plipreceive(i8255, buf, len)
|
|
volatile struct i8255 *i8255;
|
|
u_char *buf;
|
|
int len;
|
|
{
|
|
int i;
|
|
u_char cksum = 0, c;
|
|
|
|
while (len--) {
|
|
i = PLIPMXSPIN2;
|
|
while ((i8255->port_c & LPC_NBUSY) != 0)
|
|
if (i-- < 0) return -1;
|
|
c = i8255->port_c >> 4;
|
|
i8255->port_b = 0x11;
|
|
while ((i8255->port_c & LPC_NBUSY) == 0)
|
|
if (i-- < 0) return -1;
|
|
c |= i8255->port_c & 0xf0;
|
|
i8255->port_b = 0x01;
|
|
cksum += (*buf++ = c);
|
|
}
|
|
return(cksum);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
pliprxenable(arg)
|
|
void *arg;
|
|
{
|
|
struct lpt_softc *sc = arg;
|
|
volatile struct i8255 *i8255 = sc->sc_i8255;
|
|
i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;
|
|
}
|
|
|
|
static void
|
|
plipinput(sc)
|
|
struct lpt_softc *sc;
|
|
{
|
|
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
|
|
volatile struct i8255 *i8255 = sc->sc_i8255;
|
|
struct mbuf *m;
|
|
struct ether_header *eh;
|
|
u_char *p = sc->sc_ifbuf, minibuf[4];
|
|
int s, len, cksum;
|
|
|
|
if (!(i8255->port_c & LPC_NACK)) {
|
|
i8255->port_a |= LPA_ACKENABLE;
|
|
ifp->if_collisions++;
|
|
return;
|
|
}
|
|
i8255->port_b = 0x01;
|
|
i8255->port_a &= ~(LPA_ACKENABLE | LPA_ACTIVE);
|
|
|
|
if (sc->sc_ifierrs)
|
|
callout_stop(&sc->sc_pliprx_ch);
|
|
|
|
#if defined(COMPAT_PLIP10)
|
|
if (ifp->if_flags & IFF_LINK0) {
|
|
int c;
|
|
if (plipreceive(i8255, 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] = LLADDR(ifp->if_sadl)[0];
|
|
p[1] = p[ 7] = LLADDR(ifp->if_sadl)[1];
|
|
p[2] = p[ 8] = LLADDR(ifp->if_sadl)[2];
|
|
p[3] = p[ 9] = LLADDR(ifp->if_sadl)[3];
|
|
p[4] = p[10] = LLADDR(ifp->if_sadl)[4];
|
|
p += 5;
|
|
if ((cksum = plipreceive(i8255, p, 1)) < 0) goto err;
|
|
p += 6;
|
|
if ((c = plipreceive(i8255, 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(i8255, p, len)) < 0) goto err;
|
|
break;
|
|
default:
|
|
goto err;
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
if (plipreceive(i8255, minibuf, 2) < 0) goto err;
|
|
len = (minibuf[1] << 8) | minibuf[0];
|
|
if (len > (ifp->if_mtu + ifp->if_hdrlen)) {
|
|
log(LOG_NOTICE, "%s: packet (%x) > MTU\n", ifp->if_xname, len);
|
|
goto err;
|
|
}
|
|
if ((cksum = plipreceive(i8255, p, len)) < 0) goto err;
|
|
}
|
|
|
|
if (plipreceive(i8255, minibuf, 1) < 0) goto err;
|
|
if (cksum != minibuf[0]) {
|
|
log(LOG_NOTICE, "%s: checksum error\n", ifp->if_xname);
|
|
goto err;
|
|
}
|
|
i8255->port_b = 0x00;
|
|
|
|
s = splimp();
|
|
if ((m = m_devget(sc->sc_ifbuf, len, 0, ifp, NULL)) != NULL) {
|
|
/* We assume that the header fit entirely in one mbuf. */
|
|
eh = mtod(m, struct ether_header *);
|
|
#if NBPFILTER > 0
|
|
/*
|
|
* Check if there's a BPF listener on this interface.
|
|
* If so, hand off the raw packet to bpf.
|
|
*/
|
|
if (ifp->if_bpf) {
|
|
bpf_mtap(ifp->if_bpf, m);
|
|
}
|
|
#endif
|
|
(*ifp->if_input)(ifp, m);
|
|
}
|
|
splx(s);
|
|
sc->sc_ifierrs = 0;
|
|
ifp->if_ipackets++;
|
|
i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;
|
|
return;
|
|
|
|
err:
|
|
i8255->port_b = 0x00;
|
|
|
|
if (sc->sc_ifierrs < PLIPMXERRS) {
|
|
i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;
|
|
} else {
|
|
/*
|
|
* We are not able to send or 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);
|
|
i8255->port_a |= LPA_ACTIVE;
|
|
/* But we will retry from time to time. */
|
|
callout_reset(&sc->sc_pliprx_ch, PLIPRETRY * 10,
|
|
pliprxenable, sc);
|
|
}
|
|
ifp->if_ierrors++;
|
|
sc->sc_ifierrs++;
|
|
return;
|
|
}
|
|
|
|
#ifdef __OPTIMIZE__
|
|
int pliptransmit __P((volatile struct i8255 *, u_char *, int))
|
|
__asm("pliptransmit");
|
|
__asm("
|
|
pliptransmit:
|
|
enter [r3,r4,r5,r6,r7],0
|
|
movqd 0,r0
|
|
movd 8(fp),r1
|
|
movd 12(fp),r2
|
|
movd 16(fp),r3
|
|
cmpqd 0,r3
|
|
beq 5f
|
|
|
|
movqd 0,r7
|
|
movd 50000,r4
|
|
|
|
.align 2,0xa2
|
|
0: movb 8,r5
|
|
1: movb 2(r1),r6
|
|
bicb r6,r5
|
|
cmpqb 0,r5
|
|
beq 2f
|
|
acbd -1,r4,1b
|
|
br 6f
|
|
|
|
.align 2,0xa2
|
|
2: movb 0(r2),r7
|
|
movb 0x0f,r5
|
|
andb r7,r5
|
|
addqd 1,r2
|
|
movb r5,1(r1)
|
|
orb 0x10,r5
|
|
movb r5,1(r1)
|
|
|
|
movb 8,r5
|
|
3: movb 2(r1),r6
|
|
andb r6,r5
|
|
cmpqb 0,r5
|
|
beq 4f
|
|
acbd -1,r4,3b
|
|
br 6f
|
|
|
|
.align 2,0xa2
|
|
4: addd r7,r0
|
|
lshb -4,r7
|
|
movb 0x10,r5
|
|
orb r7,r5
|
|
movb r5,1(r1)
|
|
movb r7,1(r1)
|
|
acbd -1,r3,0b
|
|
|
|
andd 0xff,r0
|
|
5: exit [r3,r4,r5,r6,r7]
|
|
ret 0
|
|
|
|
6: movqd -1,r0
|
|
exit [r3,r4,r5,r6,r7]
|
|
ret 0
|
|
");
|
|
#else
|
|
static int
|
|
pliptransmit(i8255. buf, len)
|
|
volatile struct i8255 *i8255;
|
|
u_char *buf;
|
|
int len;
|
|
{
|
|
int i;
|
|
u_char cksum = 0, c;
|
|
|
|
while (len--) {
|
|
i = PLIPMXSPIN2;
|
|
cksum += (c = *buf++);
|
|
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;
|
|
}
|
|
return(cksum);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Setup output on interface.
|
|
*/
|
|
static void
|
|
plipstart(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct lpt_softc *sc = (struct lpt_softc *)(ifp->if_softc);
|
|
sc->sc_pending |= PLIP_OPENDING;
|
|
softintr(sc->sc_ifsoftint);
|
|
}
|
|
|
|
static void
|
|
plipoutput(arg)
|
|
void *arg;
|
|
{
|
|
struct lpt_softc *sc = arg;
|
|
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
|
|
volatile struct i8255 *i8255 = sc->sc_i8255;
|
|
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)
|
|
callout_stop(&sc->sc_plipout_ch);
|
|
|
|
for (;;) {
|
|
s = splimp();
|
|
IF_DEQUEUE(&ifp->if_snd, m0);
|
|
splx(s);
|
|
if (!m0)
|
|
break;
|
|
|
|
#if NBPFILTER > 0
|
|
if (ifp->if_bpf)
|
|
bpf_mtap(ifp->if_bpf, m0);
|
|
#endif
|
|
|
|
len = m0->m_pkthdr.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) {
|
|
i8255->port_b = 0x00;
|
|
sc->sc_pending = 0;
|
|
plipinput(sc);
|
|
i = PLIPMXSPIN1;
|
|
} else if (i-- < 0)
|
|
goto retry;
|
|
/* Retrigger remote interrupt */
|
|
i8255->port_b = 0x08;
|
|
} while ((i8255->port_c & LPC_NERROR) == 0);
|
|
i8255->port_a &= ~(LPA_ACKENABLE | LPA_ACTIVE);
|
|
|
|
if (pliptransmit(i8255, minibuf + 1, minibuf[0]) < 0) goto retry;
|
|
for (cksum = 0, m = m0; m; m = m->m_next) {
|
|
i = pliptransmit(i8255, mtod(m, u_char *), m->m_len);
|
|
if (i < 0) goto retry;
|
|
cksum += i;
|
|
}
|
|
if (pliptransmit(i8255, &cksum, 1) < 0) goto retry;
|
|
i = PLIPMXSPIN2;
|
|
while ((i8255->port_c & LPC_NBUSY) == 0)
|
|
if (i-- < 0) goto retry;
|
|
i8255->port_b = 0x00;
|
|
|
|
ifp->if_opackets++;
|
|
ifp->if_obytes += len + 4;
|
|
sc->sc_ifoerrs = 0;
|
|
m_freem(m0);
|
|
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;
|
|
i8255->port_b = 0x00;
|
|
|
|
if ((ifp->if_flags & (IFF_RUNNING | IFF_UP)) == (IFF_RUNNING | IFF_UP)
|
|
&& sc->sc_ifoerrs < PLIPMXRETRY) {
|
|
s = splimp();
|
|
IF_PREPEND(&ifp->if_snd, m0);
|
|
splx(s);
|
|
callout_reset(&sc->sc_plipout_ch, PLIPRETRY, plipoutput, sc);
|
|
} else {
|
|
if (sc->sc_ifoerrs == PLIPMXRETRY) {
|
|
log(LOG_NOTICE, "%s: tx hard error\n", ifp->if_xname);
|
|
}
|
|
m_freem(m0);
|
|
}
|
|
i8255->port_a |= LPA_ACKENABLE | LPA_ACTIVE;
|
|
sc->sc_ifoerrs++;
|
|
}
|
|
|
|
#endif
|