227 lines
7.1 KiB
C
227 lines
7.1 KiB
C
/* $NetBSD: lpt_gsc.c,v 1.5 2002/10/02 05:17:50 thorpej Exp $ */
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/* $OpenBSD: lpt_gsc.c,v 1.6 2000/07/21 17:41:06 mickey Exp $ */
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/*
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* Copyright (c) 1998 Michael Shalayeff
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* Copyright (c) 1993, 1994 Charles Hannum.
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* Copyright (c) 1990 William F. Jolitz, TeleMuse
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This software is a component of "386BSD" developed by
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* William F. Jolitz, TeleMuse.
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* 4. Neither the name of the developer nor the name "386BSD"
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
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* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
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* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
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* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
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* NOT MAKE USE OF THIS WORK.
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*
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* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
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* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
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* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
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* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
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* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
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* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
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* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
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* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <machine/iomod.h>
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#include <machine/autoconf.h>
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#include <dev/ic/lptreg.h>
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#include <dev/ic/lptvar.h>
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#include <hp700/dev/cpudevs.h>
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#include <hp700/gsc/gscbusvar.h>
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#define LPTGSC_OFFSET 0x800
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#ifndef LPTDEBUG
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#define LPRINTF(a)
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#else
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#define LPRINTF(a) if (lpt_isa_debug) printf a
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int lpt_isa_debug = 0;
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#endif
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int lpt_gsc_probe __P((struct device *, struct cfdata *, void *));
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void lpt_gsc_attach __P((struct device *, struct device *, void *));
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CFATTACH_DECL(lpt_gsc, sizeof(struct lpt_softc),
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lpt_gsc_probe, lpt_gsc_attach, NULL, NULL);
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int lpt_port_test __P((bus_space_tag_t, bus_space_handle_t, bus_addr_t,
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bus_size_t, u_char, u_char));
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/*
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* Internal routine to lptprobe to do port tests of one byte value.
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*/
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int
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lpt_port_test(iot, ioh, base, off, data, mask)
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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bus_addr_t base;
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bus_size_t off;
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u_char data, mask;
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{
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int timeout;
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u_char temp;
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data &= mask;
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bus_space_write_1(iot, ioh, off, data);
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timeout = 1000;
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do {
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delay(10);
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temp = bus_space_read_1(iot, ioh, off) & mask;
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} while (temp != data && --timeout);
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LPRINTF(("lpt: port=0x%x out=0x%x in=0x%x timeout=%d\n",
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(unsigned)(base + off), (unsigned)data, (unsigned)temp, timeout));
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return (temp == data);
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}
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/*
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* Logic:
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* 1) You should be able to write to and read back the same value
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* to the data port. Do an alternating zeros, alternating ones,
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* walking zero, and walking one test to check for stuck bits.
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*
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* 2) You should be able to write to and read back the same value
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* to the control port lower 5 bits, the upper 3 bits are reserved
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* per the IBM PC technical reference manauls and different boards
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* do different things with them. Do an alternating zeros, alternating
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* ones, walking zero, and walking one test to check for stuck bits.
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*
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* Some printers drag the strobe line down when the are powered off
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* so this bit has been masked out of the control port test.
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*
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* XXX Some printers may not like a fast pulse on init or strobe, I
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* don't know at this point, if that becomes a problem these bits
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* should be turned off in the mask byte for the control port test.
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*
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* 3) Set the data and control ports to a value of 0
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*/
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int
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lpt_gsc_probe(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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register struct gsc_attach_args *ga = aux;
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bus_space_handle_t ioh;
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bus_addr_t base;
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u_int8_t mask, data;
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int i, rv;
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if (ga->ga_type.iodc_type != HPPA_TYPE_FIO ||
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ga->ga_type.iodc_sv_model != HPPA_FIO_CENT)
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return 0;
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#ifdef DEBUG
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#define ABORT \
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do { \
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printf("lpt_gsc_probe: mask %x data %x failed\n", mask, \
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data); \
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bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS); \
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return 0; \
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} while (0)
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#else
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#define ABORT \
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do { \
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bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS); \
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return 0; \
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} while (0)
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#endif
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base = ga->ga_hpa + LPTGSC_OFFSET;
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if (bus_space_map(ga->ga_iot, base, LPT_NPORTS, 0, &ioh))
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return 0;
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rv = 0;
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mask = 0xff;
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data = 0x55; /* Alternating zeros */
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if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
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ABORT;
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data = 0xaa; /* Alternating ones */
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if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
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ABORT;
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for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
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data = ~(1 << i);
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if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
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ABORT;
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}
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for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
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data = (1 << i);
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if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
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ABORT;
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}
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bus_space_write_1(ga->ga_iot, ioh, lpt_data, 0);
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bus_space_write_1(ga->ga_iot, ioh, lpt_control, 0);
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bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS);
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return 1;
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}
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void
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lpt_gsc_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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register struct lpt_softc *sc = (void *)self;
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register struct gsc_attach_args *ga = aux;
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/* sc->sc_flags |= LPT_POLLED; */
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sc->sc_state = 0;
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sc->sc_iot = ga->ga_iot;
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if (bus_space_map(sc->sc_iot, ga->ga_hpa + LPTGSC_OFFSET,
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LPT_NPORTS, 0, &sc->sc_ioh)) {
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printf(": can't map i/o ports\n");
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return;
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}
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lpt_attach_subr(sc);
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sc->sc_ih = hp700_intr_establish(&sc->sc_dev, IPL_TTY,
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lptintr, sc,
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ga->ga_int_reg, ga->ga_irq);
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printf("\n");
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}
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