/* $NetBSD: lpt_jazzio.c,v 1.10 2011/07/01 19:25:42 dyoung Exp $ */ /* $OpenBSD: lpt_lbus.c,v 1.3 1997/04/10 16:29:17 pefo Exp $ */ /* * 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. */ /* * Device Driver for AT parallel printer port */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: lpt_jazzio.c,v 1.10 2011/07/01 19:25:42 dyoung Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/device.h> #include <machine/autoconf.h> #include <sys/bus.h> #include <machine/intr.h> #include <dev/ic/lptreg.h> #include <dev/ic/lptvar.h> #include <arc/jazz/jazziovar.h> int lpt_jazzio_probe(device_t, cfdata_t , void *); void lpt_jazzio_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(lpt_jazzio, sizeof(struct lpt_softc), lpt_jazzio_probe, lpt_jazzio_attach, NULL, NULL); /* * XXX - copied from lpt_isa.c * sys/arch/arm32/mainbus/lpt_pioc.c also copies this. * sys/arch/amiga/dev/lpt_supio.c doesn't. */ static int lpt_port_test(bus_space_tag_t, bus_space_handle_t, bus_addr_t, bus_size_t, u_char, u_char); /* * Internal routine to lptprobe to do port tests of one byte value. */ static int lpt_port_test(bus_space_tag_t iot, bus_space_handle_t ioh, bus_addr_t base, bus_size_t off, u_char data, u_char mask) { int timeout; u_char 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); return temp == data; } int lpt_jazzio_probe(device_t parent, cfdata_t match, void *aux) { struct jazzio_attach_args *ja = aux; bus_space_tag_t iot; bus_space_handle_t ioh; bus_addr_t base; uint8_t mask, data; int i, rv; #ifdef DEBUG #define ABORT \ do { \ printf("lpt_jazzio_probe: mask %x data %x failed\n", mask, \ data); \ goto out; \ } while (0) #else #define ABORT goto out #endif if (strcmp(ja->ja_name, "LPT1") != 0) return (0); iot = ja->ja_bust; base = ja->ja_addr; if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh)) return 0; rv = 0; mask = 0xff; data = 0x55; /* Alternating zeros */ if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) ABORT; data = 0xaa; /* Alternating ones */ if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) ABORT; for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */ data = ~(1 << i); if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) ABORT; } for (i = 0; i < CHAR_BIT; i++) { /* Walking one */ data = (1 << i); if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) ABORT; } bus_space_write_1(iot, ioh, lpt_data, 0); bus_space_write_1(iot, ioh, lpt_control, 0); rv = 1; out: bus_space_unmap(iot, ioh, LPT_NPORTS); return rv; } void lpt_jazzio_attach(device_t parent, device_t self, void *aux) { struct lpt_softc *sc = device_private(self); struct jazzio_attach_args *ja = aux; bus_space_tag_t iot; bus_space_handle_t ioh; aprint_normal("\n"); sc->sc_dev = self; sc->sc_state = 0; iot = sc->sc_iot = ja->ja_bust; if (bus_space_map(iot, ja->ja_addr, LPT_NPORTS, 0, &ioh)) { aprint_error_dev(self, "can't map i/o space\n"); return; } sc->sc_ioh = ioh; bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT); jazzio_intr_establish(ja->ja_intr, lptintr, sc); }
