/* $NetBSD: ppi.c,v 1.46 2017/03/25 22:09:45 tsutsui Exp $ */ /*- * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ /* * Copyright (c) 1982, 1990, 1993 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)ppi.c 8.1 (Berkeley) 6/16/93 */ /* * Printer/Plotter HPIB interface */ #include __KERNEL_RCSID(0, "$NetBSD: ppi.c,v 1.46 2017/03/25 22:09:45 tsutsui Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include "ioconf.h" struct ppi_softc { device_t sc_dev; int sc_flags; struct hpibqueue sc_hq; /* HP-IB job queue entry */ struct ppiparam sc_param; #define sc_burst sc_param.burst #define sc_timo sc_param.timo #define sc_delay sc_param.delay int sc_sec; int sc_slave; /* HP-IB slave address */ struct callout sc_timo_ch; struct callout sc_start_ch; }; /* sc_flags values */ #define PPIF_ALIVE 0x01 #define PPIF_OPEN 0x02 #define PPIF_UIO 0x04 #define PPIF_TIMO 0x08 #define PPIF_DELAY 0x10 static int ppimatch(device_t, cfdata_t, void *); static void ppiattach(device_t, device_t, void *); CFATTACH_DECL_NEW(ppi, sizeof(struct ppi_softc), ppimatch, ppiattach, NULL, NULL); static dev_type_open(ppiopen); static dev_type_close(ppiclose); static dev_type_read(ppiread); static dev_type_write(ppiwrite); static dev_type_ioctl(ppiioctl); const struct cdevsw ppi_cdevsw = { .d_open = ppiopen, .d_close = ppiclose, .d_read = ppiread, .d_write = ppiwrite, .d_ioctl = ppiioctl, .d_stop = nostop, .d_tty = notty, .d_poll = nopoll, .d_mmap = nommap, .d_kqfilter = nokqfilter, .d_discard = nodiscard, .d_flag = 0 }; static void ppistart(void *); static void ppinoop(void *); static void ppitimo(void *); static int ppirw(dev_t, struct uio *); static int ppihztoms(int); static int ppimstohz(int); #define UNIT(x) minor(x) #ifdef DEBUG int ppidebug = 0x80; #define PDB_FOLLOW 0x01 #define PDB_IO 0x02 #define PDB_NOCHECK 0x80 #endif static int ppimatch(device_t parent, cfdata_t cf, void *aux) { struct hpibbus_attach_args *ha = aux; /* * The printer/plotter doesn't return an ID tag. * The check below prevents us from matching a CS80 * device by mistake. */ if (ha->ha_id & 0x200) return 0; /* * To prevent matching all unused slots on the bus, we * don't allow wildcarded locators. */ if (cf->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || cf->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) return 0; return 1; } static void ppiattach(device_t parent, device_t self, void *aux) { struct ppi_softc *sc = device_private(self); struct hpibbus_attach_args *ha = aux; sc->sc_dev = self; aprint_normal("\n"); sc->sc_slave = ha->ha_slave; callout_init(&sc->sc_timo_ch, 0); callout_init(&sc->sc_start_ch, 0); /* Initialize the hpib queue entry. */ sc->sc_hq.hq_softc = sc; sc->sc_hq.hq_slave = sc->sc_slave; sc->sc_hq.hq_start = ppistart; sc->sc_hq.hq_go = ppinoop; sc->sc_hq.hq_intr = ppinoop; sc->sc_flags = PPIF_ALIVE; } static void ppinoop(void *arg) { /* Noop! */ } int ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) { struct ppi_softc *sc; sc = device_lookup_private(&ppi_cd,UNIT(dev)); if (sc == NULL) return ENXIO; if ((sc->sc_flags & PPIF_ALIVE) == 0) return ENXIO; #ifdef DEBUG if (ppidebug & PDB_FOLLOW) printf("ppiopen(%"PRIx64", %x): flags %x\n", dev, flags, sc->sc_flags); #endif if (sc->sc_flags & PPIF_OPEN) return EBUSY; sc->sc_flags |= PPIF_OPEN; sc->sc_burst = PPI_BURST; sc->sc_timo = ppimstohz(PPI_TIMO); sc->sc_delay = ppimstohz(PPI_DELAY); sc->sc_sec = -1; return 0; } static int ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) { struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); #ifdef DEBUG if (ppidebug & PDB_FOLLOW) printf("ppiclose(%"PRIx64", %x): flags %x\n", dev, flags, sc->sc_flags); #endif sc->sc_flags &= ~PPIF_OPEN; return 0; } static void ppistart(void *arg) { struct ppi_softc *sc = arg; #ifdef DEBUG if (ppidebug & PDB_FOLLOW) printf("ppistart(%x)\n", device_unit(sc->sc_dev)); #endif sc->sc_flags &= ~PPIF_DELAY; wakeup(sc); } static void ppitimo(void *arg) { struct ppi_softc *sc = arg; #ifdef DEBUG if (ppidebug & PDB_FOLLOW) printf("ppitimo(%x)\n", device_unit(sc->sc_dev)); #endif sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); wakeup(sc); } static int ppiread(dev_t dev, struct uio *uio, int flags) { #ifdef DEBUG if (ppidebug & PDB_FOLLOW) printf("ppiread(%"PRIx64", %p)\n", dev, uio); #endif return ppirw(dev, uio); } static int ppiwrite(dev_t dev, struct uio *uio, int flags) { #ifdef DEBUG if (ppidebug & PDB_FOLLOW) printf("ppiwrite(%"PRIx64", %p)\n", dev, uio); #endif return ppirw(dev, uio); } static int ppirw(dev_t dev, struct uio *uio) { struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); int s, s2, len, cnt; char *cp; int error = 0, gotdata = 0; int buflen, ctlr, slave; char *buf; if (uio->uio_resid == 0) return 0; ctlr = device_unit(device_parent(sc->sc_dev)); slave = sc->sc_slave; #ifdef DEBUG if (ppidebug & (PDB_FOLLOW|PDB_IO)) printf("ppirw(%"PRIx64", %p, %c): burst %d, timo %d, resid %x\n", dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', sc->sc_burst, sc->sc_timo, uio->uio_resid); #endif buflen = min(sc->sc_burst, uio->uio_resid); buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); sc->sc_flags |= PPIF_UIO; if (sc->sc_timo > 0) { sc->sc_flags |= PPIF_TIMO; callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); } len = cnt = 0; while (uio->uio_resid > 0) { len = min(buflen, uio->uio_resid); cp = buf; if (uio->uio_rw == UIO_WRITE) { error = uiomove(cp, len, uio); if (error) break; } again: s = splsoftclock(); s2 = splbio(); if ((sc->sc_flags & PPIF_UIO) && hpibreq(device_parent(sc->sc_dev), &sc->sc_hq) == 0) (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); /* * Check if we timed out during sleep or uiomove */ splx(s2); if ((sc->sc_flags & PPIF_UIO) == 0) { #ifdef DEBUG if (ppidebug & PDB_IO) printf("ppirw: uiomove/sleep timo, flags %x\n", sc->sc_flags); #endif if (sc->sc_flags & PPIF_TIMO) { callout_stop(&sc->sc_timo_ch); sc->sc_flags &= ~PPIF_TIMO; } splx(s); break; } splx(s); /* * Perform the operation */ if (uio->uio_rw == UIO_WRITE) cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); else cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); s = splbio(); hpibfree(device_parent(sc->sc_dev), &sc->sc_hq); #ifdef DEBUG if (ppidebug & PDB_IO) printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", uio->uio_rw == UIO_READ ? "recv" : "send", ctlr, slave, sc->sc_sec, cp, len, cnt); #endif splx(s); if (uio->uio_rw == UIO_READ) { if (cnt) { error = uiomove(cp, cnt, uio); if (error) break; gotdata++; } /* * Didn't get anything this time, but did in the past. * Consider us done. */ else if (gotdata) break; } s = splsoftclock(); /* * Operation timeout (or non-blocking), quit now. */ if ((sc->sc_flags & PPIF_UIO) == 0) { #ifdef DEBUG if (ppidebug & PDB_IO) printf("ppirw: timeout/done\n"); #endif splx(s); break; } /* * Implement inter-read delay */ if (sc->sc_delay > 0) { sc->sc_flags |= PPIF_DELAY; callout_reset(&sc->sc_start_ch, sc->sc_delay, ppistart, sc); error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); if (error) { splx(s); break; } } splx(s); /* * Must not call uiomove again til we've used all data * that we already grabbed. */ if (uio->uio_rw == UIO_WRITE && cnt != len) { cp += cnt; len -= cnt; cnt = 0; goto again; } } s = splsoftclock(); if (sc->sc_flags & PPIF_TIMO) { callout_stop(&sc->sc_timo_ch); sc->sc_flags &= ~PPIF_TIMO; } if (sc->sc_flags & PPIF_DELAY) { callout_stop(&sc->sc_start_ch); sc->sc_flags &= ~PPIF_DELAY; } splx(s); /* * Adjust for those chars that we uiomove'ed but never wrote */ if (uio->uio_rw == UIO_WRITE && cnt != len) { uio->uio_resid += (len - cnt); #ifdef DEBUG if (ppidebug & PDB_IO) printf("ppirw: short write, adjust by %d\n", len-cnt); #endif } free(buf, M_DEVBUF); #ifdef DEBUG if (ppidebug & (PDB_FOLLOW|PDB_IO)) printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); #endif return error; } static int ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) { struct ppi_softc *sc = device_lookup_private(&ppi_cd,UNIT(dev)); struct ppiparam *pp, *upp; int error = 0; switch (cmd) { case PPIIOCGPARAM: pp = &sc->sc_param; upp = (struct ppiparam *)data; upp->burst = pp->burst; upp->timo = ppihztoms(pp->timo); upp->delay = ppihztoms(pp->delay); break; case PPIIOCSPARAM: pp = &sc->sc_param; upp = (struct ppiparam *)data; if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) return EINVAL; pp->burst = upp->burst; pp->timo = ppimstohz(upp->timo); pp->delay = ppimstohz(upp->delay); break; case PPIIOCSSEC: sc->sc_sec = *(int *)data; break; default: return EINVAL; } return error; } static int ppihztoms(int h) { int m = h; if (m > 0) m = m * 1000 / hz; return m; } static int ppimstohz(int m) { int h = m; if (h > 0) { h = h * hz / 1000; if (h == 0) h = 1000 / hz; } return h; }