/** $MirOS: src/sys/dev/ic/lpt.c,v 1.3 2005/07/04 01:39:08 tg Exp $ */ /* $OpenBSD: lpt.c,v 1.5 2002/03/14 01:26:54 millert Exp $ */ /* $NetBSD: lpt.c,v 1.42 1996/10/21 22:41:14 thorpej Exp $ */ /* * Copyright (c) 2003, 2005 Thorsten Glaser * Copyright (c) 1994 Matthias Pfaller. * Copyright (c) 1994 Poul-Henning Kamp. * 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 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(INET) && defined(PLIP) #include "bpfilter.h" #include #include #include #include #include #ifdef __NetBSD__ #include #endif #include #include #include #include #include #ifdef __NetBSD__ #include #else #include #endif #if NBPFILTER > 0 #include #include #endif #endif #include #include #include "lpt.h" #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(a) if (lptdebug) printf a int lptdebug = 1; #endif #if defined(INET) && defined(PLIP) #define PLIPMTU ETHERMTU #ifndef PLIPMXSPIN1 /* DELAY factor for the plip# interfaces */ #define PLIPMXSPIN1 50000 /* Spinning for remote intr to happen */ #endif #ifndef PLIPMXSPIN2 /* DELAY factor for the plip# interfaces */ #define PLIPMXSPIN2 50000 /* Spinning for remote handshake to happen */ #endif #ifndef PLIPMXERRS /* Max errors before !RUNNING */ #define PLIPMXERRS 50 #endif #ifndef PLIPMXRETRY #define PLIPMXRETRY 20 /* Max number of retransmits */ #endif #ifndef PLIPRETRY #define PLIPRETRY hz/50 /* Time between retransmits */ #endif #define STABILIZE(iot, ioh, io) ({ \ int v1, v2; \ v2 = bus_space_read_1(iot, ioh, io); \ do { \ v1 = v2; \ v2 = bus_space_read_1(iot, ioh, io); \ } while (v1 != v2); \ v2; \ }) #endif #if defined(INET) && defined(PLIP) /* Functions for the plip# interface */ static void plipattach(struct lpt_softc *); static void plipinput(struct lpt_softc *); static int plipioctl(struct ifnet *, u_long, caddr_t); static void plipoutput(void *); static int plipreceive(struct lpt_softc *, u_char *, int); static void pliprxenable(void *); void plipsoftint(void); static void plipstart(struct ifnet *); static int pliptransmit(struct lpt_softc *, u_char *, int); #endif /* XXX does not belong here */ cdev_decl(lpt); 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_space_read_1(iot, ioh, lpt_status) ^ LPS_INVERT) & LPS_MASK) #define NOT_READY_ERR() \ lpt_not_ready(bus_space_read_1(iot, ioh, lpt_status), sc) int lpt_not_ready(u_int8_t, struct lpt_softc *); void lptwakeup(void *arg); int lptpushbytes(struct lpt_softc *); /* * Internal routine to lptprobe to do port tests of one byte value. */ int lpt_port_test(iot, ioh, base, off, data, mask) bus_space_tag_t iot; bus_space_handle_t ioh; bus_addr_t base; bus_size_t off; u_int8_t data, mask; { int timeout; u_int8_t temp; data &= mask; bus_space_write_1(iot, ioh, off, data); timeout = 1000; do { delay(10); temp = bus_space_read_1(iot, 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); } void lpt_attach_common(sc) struct lpt_softc *sc; { printf("\n"); bus_space_write_1(sc->sc_iot, sc->sc_ioh, lpt_control, LPC_NINIT); #if defined(INET) && defined(PLIP) plipattach(sc); #endif timeout_set(&sc->sc_wakeup_tmo, lptwakeup, sc); } /* * 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_int8_t flags = LPTFLAGS(dev); struct lpt_softc *sc; bus_space_tag_t iot; bus_space_handle_t ioh; u_int8_t control; int error; int spin; if (unit >= lpt_cd.cd_ndevs) return ENXIO; sc = lpt_cd.cd_devs[unit]; if (!sc) return ENXIO; sc->sc_flags = (sc->sc_flags & LPT_POLLED) | flags; if ((sc->sc_flags & (LPT_POLLED|LPT_NOINTR)) == LPT_POLLED) 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; #if defined(INET) && defined(PLIP) #ifdef __NetBSD__ if (sc->sc_ethercom.ec_if.if_flags & IFF_UP) #else if (sc->sc_arpcom.ac_if.if_flags & IFF_UP) #endif return EBUSY; #endif sc->sc_state = LPT_INIT; LPRINTF(("%s: open: flags=0x%x\n", sc->sc_dev.dv_xname, flags)); iot = sc->sc_iot; ioh = sc->sc_ioh; if ((flags & LPT_NOPRIME) == 0) { /* assert INIT for 100 usec to start up printer */ bus_space_write_1(iot, ioh, lpt_control, LPC_SELECT); delay(100); } control = LPC_SELECT | LPC_NINIT; bus_space_write_1(iot, 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_space_write_1(iot, 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 lpt_not_ready(status, sc) u_int8_t status; struct lpt_softc *sc; { u_int8_t 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_add(&sc->sc_wakeup_tmo, 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_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; if (sc->sc_count) (void) lptpushbytes(sc); if ((sc->sc_flags & LPT_NOINTR) == 0) timeout_del(&sc->sc_wakeup_tmo); bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT); sc->sc_state = 0; bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT); brelse(sc->sc_inbuf); LPRINTF(("%s: closed\n", sc->sc_dev.dv_xname)); return 0; } int lptpushbytes(sc) struct lpt_softc *sc; { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int error; if (sc->sc_flags & LPT_NOINTR) { int spin, tic; u_int8_t 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_space_write_1(iot, ioh, lpt_data, *sc->sc_cp++); bus_space_write_1(iot, ioh, lpt_control, control | LPC_STROBE); sc->sc_count--; bus_space_write_1(iot, 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 = lptpushbytes(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_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; if (((sc->sc_state & LPT_OPEN) == 0 && sc->sc_count == 0) || (sc->sc_flags & LPT_NOINTR)) return 0; #if defined(INET) && defined(PLIP) #ifdef __NetBSD__ if (sc->sc_ethercom.ec_if.if_flags & IFF_UP) { #else if (sc->sc_arpcom.ac_if.if_flags & IFF_UP) { #endif if ((sc->sc_control & LPC_IENABLE) == 0) return 0; /* dispose spurious interrupt */ bus_space_write_1(iot, ioh, lpt_control, sc->sc_control &= ~LPC_IENABLE); sc->sc_pending |= PLIP_IPENDING; /*softintr(sc->sc_ifsoftint);*/ schednetisr(NETISR_PLIP); return 0; } #endif /* is printer online and ready for output */ if (NOT_READY() && NOT_READY_ERR()) return -1; if (sc->sc_count) { u_int8_t control = sc->sc_control; /* send char */ bus_space_write_1(iot, ioh, lpt_data, *sc->sc_cp++); delay (50); bus_space_write_1(iot, ioh, lpt_control, control | LPC_STROBE); sc->sc_count--; bus_space_write_1(iot, 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; } 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) static void plipattach(struct lpt_softc *sc) { #ifdef __NetBSD__ struct ifnet *ifp = &sc->sc_ethercom.ec_if; #else struct ifnet *ifp = &sc->sc_arpcom.ac_if; #endif u_int8_t myaddr[ETHER_ADDR_LEN]; sc->sc_ifbuf = NULL; snprintf(ifp->if_xname, sizeof ifp->if_xname, "plip%d", sc->sc_dev.dv_unit); bzero(myaddr, 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; bzero(&sc->sc_pliptimeout, sizeof(struct timeout)); if_attach(ifp); ether_ifattach(ifp); ifp->if_mtu = PLIPMTU; #if NBPFILTER > 0 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif /* * We hope to get Charle's MI softint establish RSN - the * current hack involves patching icu.s and hardcoding * the softinterupts in a complete unrelated peace * of code.... sc->sc_ifsoftint = isa_intr_establish(SOFTINT, 0, ISA_IPL_NET, plipsoftint, sc); */ } /* * 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; u_char control = sc->sc_control; struct ifaddr *ifa = (struct ifaddr *)data; struct ifreq *ifr = (struct ifreq *)data; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; 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; control = LPC_SELECT | LPC_NINIT; bus_space_write_1(iot, ioh, lpt_control, control); 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_ih == 0) { error = EINVAL; break; } if (!sc->sc_ifbuf) sc->sc_ifbuf = malloc(ifp->if_mtu + ifp->if_hdrlen, M_DEVBUF, M_WAITOK); ifp->if_flags |= IFF_RUNNING; bus_space_write_1(iot, ioh, lpt_control, control & ~LPC_IENABLE); bus_space_write_1(iot, ioh, lpt_data, 0); bus_space_write_1(iot, ioh, lpt_control, control |= LPC_IENABLE); } 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; bcopy((caddr_t)&IA_SIN(ifa)->sin_addr, (caddr_t)&LLADDR(sdl)[2], 4); ifp->if_flags |= IFF_RUNNING | IFF_UP; bus_space_write_1(iot, ioh, lpt_control, control & ~LPC_IENABLE); bus_space_write_1(iot, ioh, lpt_data, 0); bus_space_write_1(iot, ioh, lpt_control, control |= LPC_IENABLE); 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, 0))) return(error); if (ifp->if_mtu != ifr->ifr_metric) { ifp->if_mtu = ifr->ifr_metric; 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; } sc->sc_control = control; return (error); } void plipsoftint(void) { /* while the MI softint framework isn't there, we check check all lpt devices */ struct device *dev; for (dev = alldevs.tqh_first; dev; dev = dev->dv_list.tqe_next) { if (dev->dv_cfdata->cf_driver == &lpt_cd) { int pending; struct lpt_softc *sc = (struct lpt_softc*)dev; 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(struct lpt_softc *sc, u_char *buf, int len) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int i; u_char cksum = 0, cl, ch; while (len--) { i = PLIPMXSPIN2; while (((cl = STABILIZE(iot, ioh, lpt_status)) & LPS_NBSY) != 0) if (i-- < 0) return -1; cl = (cl >> 3) & 0x0f; bus_space_write_1(iot, ioh, lpt_data, 0x11); while (((ch = STABILIZE(iot, ioh, lpt_status)) & LPS_NBSY) == 0) if (i-- < 0) return -1; cl |= (ch << 1) & 0xf0; bus_space_write_1(iot, ioh, lpt_data, 0x01); cksum += (*buf++ = cl); } return(cksum); } static void pliprxenable(void *arg) { struct lpt_softc *sc = arg; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; bus_space_write_1(iot, ioh, lpt_control, sc->sc_control |= LPC_IENABLE); } static void plipinput(struct lpt_softc *sc) { #ifdef __NetBSD__ struct ifnet *ifp = &sc->sc_ethercom.ec_if; #else struct ifnet *ifp = &sc->sc_arpcom.ac_if; #endif bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; struct mbuf *m; struct ether_header *eh; u_char *p = sc->sc_ifbuf, minibuf[4]; int s, len, cksum; if (((ifp->if_flags & IFF_LINK2) == 0) && (!(STABILIZE(iot, ioh, lpt_status) & LPS_NACK))) { bus_space_write_1(iot, ioh, lpt_control, sc->sc_control |= LPC_IENABLE); ifp->if_collisions++; return; } bus_space_write_1(iot, ioh, lpt_data, 0x01); bus_space_write_1(iot, ioh, lpt_control, sc->sc_control &= ~LPC_IENABLE); if (sc->sc_ifierrs) timeout_del(&sc->sc_pliptimeout); if (plipreceive(sc, 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_xname); goto err; } if ((cksum = plipreceive(sc, p, len)) < 0) goto err; if (plipreceive(sc, minibuf, 1) < 0) goto err; if (cksum != minibuf[0]) { log(LOG_NOTICE, "%s: checksum error\n", ifp->if_xname); goto err; } bus_space_write_1(iot, ioh, lpt_data, 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 /* We assume the header fit entirely in one mbuf. */ m_adj(m, sizeof(struct ether_header)); ether_input_mbuf(ifp, m); } splx(s); sc->sc_ifierrs = 0; ifp->if_ipackets++; bus_space_write_1(iot, ioh, lpt_control, sc->sc_control |= LPC_IENABLE); return; err: bus_space_write_1(iot, ioh, lpt_data, 0x00); if (sc->sc_ifierrs < PLIPMXERRS) { if (sc->sc_ifierrs > 4 && (STABILIZE(iot, ioh, lpt_status) & LPS_NBSY)) { /* Avoid interrupt nesting ... */ sc->sc_ifierrs = PLIPMXERRS - 1; } bus_space_write_1(iot, ioh, lpt_control, sc->sc_control |= LPC_IENABLE); } 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); /* But we will retry from time to time. */ timeout_set(&sc->sc_pliptimeout, pliprxenable, sc); timeout_add(&sc->sc_pliptimeout, PLIPRETRY * 10); } ifp->if_ierrors++; sc->sc_ifierrs++; return; } static int pliptransmit(struct lpt_softc *sc, u_char *buf, int len) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int i; u_char cksum = 0, c; while (len--) { i = PLIPMXSPIN2; cksum += (c = *buf++); while ((STABILIZE(iot, ioh, lpt_status) & LPS_NBSY) == 0) if (i-- < 0) return -1; bus_space_write_1(iot, ioh, lpt_data, c & 0x0f); bus_space_write_1(iot, ioh, lpt_data, (c & 0x0f) | 0x10); c >>= 4; while ((STABILIZE(iot, ioh, lpt_status) & LPS_NBSY) != 0) if (i-- < 0) return -1; bus_space_write_1(iot, ioh, lpt_data, c | 0x10); bus_space_write_1(iot, 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; /*softintr(sc->sc_ifsoftint);*/ schednetisr(NETISR_PLIP); } static void plipoutput(void *arg) { struct lpt_softc *sc = arg; #ifdef __NetBSD__ struct ifnet *ifp = &sc->sc_ethercom.ec_if; #else struct ifnet *ifp = &sc->sc_arpcom.ac_if; #endif bus_space_tag_t iot = sc->sc_iot; bus_space_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) timeout_del(&sc->sc_pliptimeout); for (;;) { s = splnet(); 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; minibuf[0] = 2; minibuf[1] = len; minibuf[2] = len >> 8; /* Trigger remote interrupt */ i = PLIPMXSPIN1; do { if (sc->sc_pending & PLIP_IPENDING) { bus_space_write_1(iot, ioh, lpt_data, 0x00); sc->sc_pending = 0; plipinput(sc); i = PLIPMXSPIN1; } else if (i-- < 0) goto retry; /* Retrigger remote interrupt */ bus_space_write_1(iot, ioh, lpt_data, 0x08); } while ((STABILIZE(iot, ioh, lpt_status) & LPS_NERR) == 0); bus_space_write_1(iot, ioh, lpt_control, sc->sc_control &= ~LPC_IENABLE); if (pliptransmit(sc, minibuf + 1, minibuf[0]) < 0) goto retry; for (cksum = 0, m = m0; m; m = m->m_next) { i = pliptransmit(sc, mtod(m, u_char *), m->m_len); if (i < 0) goto retry; cksum += i; } if (pliptransmit(sc, &cksum, 1) < 0) goto retry; i = PLIPMXSPIN2; while ((STABILIZE(iot, ioh, lpt_status) & LPS_NBSY) == 0) if (i-- < 0) goto retry; sc->sc_pending = 0; bus_space_write_1(iot, ioh, lpt_data, 0x00); ifp->if_opackets++; ifp->if_obytes += len + 4; sc->sc_ifoerrs = 0; m_freem(m0); bus_space_write_1(iot, ioh, lpt_control, sc->sc_control |= LPC_IENABLE); } ifp->if_flags &= ~IFF_OACTIVE; return; retry: if (STABILIZE(iot, ioh, lpt_status) & LPS_NACK) ifp->if_collisions++; else ifp->if_oerrors++; ifp->if_flags &= ~IFF_OACTIVE; bus_space_write_1(iot, ioh, lpt_data, 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); timeout_set(&sc->sc_pliptimeout, plipoutput, sc); timeout_add(&sc->sc_pliptimeout, PLIPRETRY); } else { /* we are not able to send this... give up for now */ if (sc->sc_ifoerrs == PLIPMXRETRY) { log(LOG_NOTICE, "%s: tx hard error\n", ifp->if_xname); } m_freem(m0); } bus_space_write_1(iot, ioh, lpt_control, sc->sc_control |= LPC_IENABLE); sc->sc_ifoerrs++; } #endif /* PLIP and INET */