/* $NetBSD: arcpp.c,v 1.15 2015/08/30 04:16:18 dholland Exp $ */ /*- * Copyright (c) 2001 Ben Harris * Copyright (c) 1993, 1994 Charles M. 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. */ #include __KERNEL_RCSID(0, "$NetBSD: arcpp.c,v 1.15 2015/08/30 04:16:18 dholland Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ioeb.h" struct arcpp_softc { device_t sc_dev; void *sc_aih; /* ACK interrupt handler */ struct evcnt sc_aintrcnt; /* ... and count */ void *sc_bih; /* BUSY interrupt handler */ struct evcnt sc_bintrcnt; /* ... and count */ size_t sc_count; void *sc_inbuf; u_char *sc_cp; int sc_spinmax; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; u_char sc_state; #define ARCPP_OPEN 0x01 /* device is open */ #define ARCPP_OBUSY 0x02 /* printer is busy doing output */ #define ARCPP_INIT 0x04 /* waiting to initialize for open */ u_char sc_flags; /*#define ARCPP_AUTOLF 0x20 * automatic LF on CR */ /*#define ARCPP_NOPRIME 0x40 * don't prime on open */ /*#define ARCPP_NOINTR 0x80 * do not use interrupt */ u_char sc_laststatus; }; #define TIMEOUT (hz*16) /* wait up to 16 seconds for a ready */ #define STEP (hz/4) #define ARCPPPRI (PZERO+8) #define ARCPP_BSIZE 1024 extern struct cfdriver arcpp_cd; dev_type_open(arcppopen); dev_type_close(arcppclose); dev_type_write(arcppwrite); const struct cdevsw arcpp_cdevsw = { .d_open = arcppopen, .d_close = arcppclose, .d_read = noread, .d_write = arcppwrite, .d_ioctl = noioctl, .d_stop = nostop, .d_tty = notty, .d_poll = nopoll, .d_mmap = nommap, .d_kqfilter = nokqfilter, .d_discard = nodiscard, .d_flag = 0 }; #define ARCPPUNIT(s) (minor(s) & 0x1f) #define ARCPPFLAGS(s) (minor(s) & 0xe0) static int arcpp_match(device_t, cfdata_t, void *); static void arcpp_attach(device_t, device_t, void *); static int arcppintr(void *); static int arcpppushbytes(struct arcpp_softc *); CFATTACH_DECL_NEW(arcpp, sizeof(struct arcpp_softc), arcpp_match, arcpp_attach, NULL, NULL); static int arcpp_match(device_t parent, cfdata_t cf, void *aux) { /* * The parallel port is write-only, so we can't probe for it. * Happily, the set of machines it exists on is precisely the * set that doesn't have IOEBs, so... */ #if NIOEB > 0 if (the_ioeb != NULL) return 0; #endif return 1; } static void arcpp_attach(device_t parent, device_t self, void *aux) { struct arcpp_softc *sc = device_private(self); struct ioc_attach_args *ioc = aux; bus_space_tag_t iot; bus_space_handle_t ioh; sc->sc_dev = self; iot = sc->sc_iot = ioc->ioc_fast_t; ioh = sc->sc_ioh = ioc->ioc_fast_h; evcnt_attach_dynamic(&sc->sc_aintrcnt, EVCNT_TYPE_INTR, NULL, device_xname(self), "ack intr"); evcnt_attach_dynamic(&sc->sc_bintrcnt, EVCNT_TYPE_INTR, NULL, device_xname(self), "busy intr"); sc->sc_aih = irq_establish(IRQ_PACK, IPL_VM, arcppintr, sc, &sc->sc_aintrcnt); sc->sc_bih = irq_establish(IRQ_PBSY, IPL_VM, arcppintr, sc, &sc->sc_bintrcnt); /* We're not interested in interrupts while the device is closed. */ irq_disable(sc->sc_aih); irq_disable(sc->sc_bih); aprint_normal("\n"); } /* * Wait until the printer's selected and not busy. */ int arcppopen(dev_t dev, int flag, int mode, struct lwp *l) { u_char flags = ARCPPFLAGS(dev); struct arcpp_softc *sc; bus_space_tag_t iot; bus_space_handle_t ioh; int error, s; sc = device_lookup_private(&arcpp_cd, ARCPPUNIT(dev)); if (sc == NULL) return ENXIO; #ifdef DIAGNOSTIC if (sc->sc_state) printf("%s: stat=0x%x not zero\n", device_xname(sc->sc_dev), sc->sc_state); #endif if (sc->sc_state) return EBUSY; sc->sc_state = ARCPP_INIT; sc->sc_flags = flags; iot = sc->sc_iot; ioh = sc->sc_ioh; s = splvm(); /* wait till ready (printer running diagnostics) */ irq_enable(sc->sc_bih); /* XXX Is it really appropriate to time out? */ error = tsleep((void *)sc, ARCPPPRI | PCATCH, "arcppopen", TIMEOUT); if (error == EWOULDBLOCK) { sc->sc_state = 0; splx(s); return EBUSY; } if (error) { sc->sc_state = 0; splx(s); return error; } sc->sc_inbuf = malloc(ARCPP_BSIZE, M_DEVBUF, M_WAITOK); sc->sc_count = 0; sc->sc_state = ARCPP_OPEN; arcppintr(sc); splx(s); return 0; } /* * Close the device, and free the local line buffer. */ int arcppclose(dev_t dev, int flag, int mode, struct lwp *l) { struct arcpp_softc *sc = device_lookup_private(&arcpp_cd, ARCPPUNIT(dev)); if (sc->sc_count) (void) arcpppushbytes(sc); irq_disable(sc->sc_aih); irq_disable(sc->sc_bih); sc->sc_state = 0; free(sc->sc_inbuf, M_DEVBUF); return 0; } static int arcpppushbytes(struct arcpp_softc *sc) { int error; int s; while (sc->sc_count > 0) { /* if the printer is ready for a char, give it one */ if ((sc->sc_state & ARCPP_OBUSY) == 0) { s = splvm(); arcppintr(sc); splx(s); } error = tsleep((void *)sc, ARCPPPRI | PCATCH, "arcppwr", 0); if (error) return error; } return 0; } int arcppwrite(dev_t dev, struct uio *uio, int flags) { struct arcpp_softc *sc = device_lookup_private(&arcpp_cd, ARCPPUNIT(dev)); size_t n; int error = 0; while ((n = min(ARCPP_BSIZE, uio->uio_resid)) != 0) { uiomove(sc->sc_cp = sc->sc_inbuf, n, uio); sc->sc_count = n; error = arcpppushbytes(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 arcppintr(void *arg) { struct arcpp_softc *sc = arg; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; /* is printer online and ready for output */ if (!ioc_irq_status(IRQ_PBSY)) { return 0; } if (sc->sc_count) { /* send char */ bus_space_write_1(iot, ioh, ARCPP_DATA, *sc->sc_cp++); DELAY(1); latchb_update(LATCHB_NPSTB, 0); DELAY(1); sc->sc_count--; latchb_update(LATCHB_NPSTB, LATCHB_NPSTB); DELAY(1); sc->sc_state |= ARCPP_OBUSY; } else sc->sc_state &= ~ARCPP_OBUSY; if (sc->sc_count == 0) /* none, wake up the top half to get more */ wakeup((void *)sc); return 1; }