/* $NetBSD: ppi.c,v 1.22.20.1 2019/11/14 16:04:31 martin Exp $ */ /*- * Copyright (c) 1996-2003 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 GPIB interface */ #include __KERNEL_RCSID(0, "$NetBSD: ppi.c,v 1.22.20.1 2019/11/14 16:04:31 martin Exp $"); #include #include #include #include #include #include #include #include #include #include struct ppi_softc { device_t sc_dev; gpib_chipset_tag_t sc_ic; gpib_handle_t sc_hdl; int sc_address; /* GPIB address */ int sc_flags; int sc_sec; struct ppiparam sc_param; #define sc_burst sc_param.burst #define sc_timo sc_param.timo #define sc_delay sc_param.delay 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 int ppimatch(device_t, cfdata_t, void *); void ppiattach(device_t, device_t, void *); CFATTACH_DECL_NEW(ppi, sizeof(struct ppi_softc), ppimatch, ppiattach, NULL, NULL); extern struct cfdriver ppi_cd; void ppicallback(void *, int); void ppistart(void *); void ppitimo(void *); int ppirw(dev_t, struct uio *); int ppihztoms(int); int ppimstohz(int); dev_type_open(ppiopen); dev_type_close(ppiclose); dev_type_read(ppiread); dev_type_write(ppiwrite); 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 = D_OTHER }; #define UNIT(x) minor(x) #ifdef DEBUG int ppidebug = 0x80; #define PDB_FOLLOW 0x01 #define PDB_IO 0x02 #define PDB_NOCHECK 0x80 #define DPRINTF(mask, str) if (ppidebug & (mask)) printf str #else #define DPRINTF(mask, str) /* nothing */ #endif int ppimatch(device_t parent, cfdata_t match, void *aux) { return (1); } void ppiattach(device_t parent, device_t self, void *aux) { struct ppi_softc *sc = device_private(self); struct gpib_attach_args *ga = aux; printf("\n"); sc->sc_dev = self; sc->sc_ic = ga->ga_ic; sc->sc_address = ga->ga_address; callout_init(&sc->sc_timo_ch, 0); callout_init(&sc->sc_start_ch, 0); if (gpibregister(sc->sc_ic, sc->sc_address, ppicallback, sc, &sc->sc_hdl)) { aprint_error_dev(sc->sc_dev, "can't register callback\n"); return; } sc->sc_flags = PPIF_ALIVE; } 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); DPRINTF(PDB_FOLLOW, ("ppiopen(%" PRIx64 ", %x): flags %x\n", dev, flags, sc->sc_flags)); 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); } int ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) { struct ppi_softc *sc; sc = device_lookup_private(&ppi_cd, UNIT(dev)); DPRINTF(PDB_FOLLOW, ("ppiclose(%" PRIx64 ", %x): flags %x\n", dev, flags, sc->sc_flags)); sc->sc_flags &= ~PPIF_OPEN; return (0); } void ppicallback(void *v, int action) { struct ppi_softc *sc = v; DPRINTF(PDB_FOLLOW, ("ppicallback: v=%p, action=%d\n", v, action)); switch (action) { case GPIBCBF_START: ppistart(sc); case GPIBCBF_INTR: /* no-op */ break; #ifdef DEBUG default: DPRINTF(PDB_FOLLOW, ("ppicallback: unknown action %d\n", action)); break; #endif } } void ppistart(void *v) { struct ppi_softc *sc = v; DPRINTF(PDB_FOLLOW, ("ppistart(%x)\n", device_unit(sc->sc_dev))); sc->sc_flags &= ~PPIF_DELAY; wakeup(sc); } void ppitimo(void *arg) { struct ppi_softc *sc = arg; DPRINTF(PDB_FOLLOW, ("ppitimo(%x)\n", device_unit(sc->sc_dev))); sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); wakeup(sc); } int ppiread(dev_t dev, struct uio *uio, int flags) { DPRINTF(PDB_FOLLOW, ("ppiread(%" PRIx64 ", %p)\n", dev, uio)); return (ppirw(dev, uio)); } int ppiwrite(dev_t dev, struct uio *uio, int flags) { DPRINTF(PDB_FOLLOW, ("ppiwrite(%" PRIx64 ", %p)\n", dev, uio)); return (ppirw(dev, uio)); } int ppirw(dev_t dev, struct uio *uio) { struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); int s1, s2, len, cnt; char *cp; int error = 0, gotdata = 0; int buflen, address; char *buf; if (uio->uio_resid == 0) return (0); address = sc->sc_address; DPRINTF(PDB_FOLLOW|PDB_IO, ("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)); 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: s1 = splsoftclock(); s2 = splbio(); if (sc->sc_flags & PPIF_UIO) { if (gpibrequest(sc->sc_ic, sc->sc_hdl) == 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) { DPRINTF(PDB_IO, ("ppirw: uiomove/sleep timo, flags %x\n", sc->sc_flags)); if (sc->sc_flags & PPIF_TIMO) { callout_stop(&sc->sc_timo_ch); sc->sc_flags &= ~PPIF_TIMO; } splx(s1); break; } splx(s1); /* * Perform the operation */ if (uio->uio_rw == UIO_WRITE) cnt = gpibsend(sc->sc_ic, address, sc->sc_sec, cp, len); else cnt = gpibrecv(sc->sc_ic, address, sc->sc_sec, cp, len); s1 = splbio(); gpibrelease(sc->sc_ic, sc->sc_hdl); DPRINTF(PDB_IO, ("ppirw: %s(%d, %x, %p, %d) -> %d\n", uio->uio_rw == UIO_READ ? "recv" : "send", address, sc->sc_sec, cp, len, cnt)); splx(s1); 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; } s1 = splsoftclock(); /* * Operation timeout (or non-blocking), quit now. */ if ((sc->sc_flags & PPIF_UIO) == 0) { DPRINTF(PDB_IO, ("ppirw: timeout/done\n")); splx(s1); 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, "gpib", 0); if (error) { splx(s1); break; } } splx(s1); /* * 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; } } s1 = 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(s1); /* * Adjust for those chars that we uiomove'ed but never wrote */ if (uio->uio_rw == UIO_WRITE && cnt != len) { uio->uio_resid += (len - cnt); DPRINTF(PDB_IO, ("ppirw: short write, adjust by %d\n", len - cnt)); } free(buf, M_DEVBUF); DPRINTF(PDB_FOLLOW|PDB_IO, ("ppirw: return %d, resid %d\n", error, uio->uio_resid)); return (error); } 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); } int ppihztoms(int h) { extern int hz; int m = h; if (m > 0) m = m * 1000 / hz; return (m); } int ppimstohz(int m) { extern int hz; int h = m; if (h > 0) { h = h * hz / 1000; if (h == 0) h = 1000 / hz; } return (h); }