/* $NetBSD: lpt.c,v 1.12 1996/10/15 15:51:56 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(INET) && defined(PLIP) #include #include #include #include #include #include #include #include #include #include #include #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_NONE; 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