1 /* $NetBSD: lpt_jazzio.c,v 1.3 2002/10/02 04:59:49 thorpej Exp $ */ 2 /* $OpenBSD: lpt_lbus.c,v 1.3 1997/04/10 16:29:17 pefo Exp $ */ 3 4 /* 5 * Copyright (c) 1993, 1994 Charles M. Hannum. 6 * Copyright (c) 1990 William F. Jolitz, TeleMuse 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This software is a component of "386BSD" developed by 20 * William F. Jolitz, TeleMuse. 21 * 4. Neither the name of the developer nor the name "386BSD" 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ 26 * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS 27 * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. 28 * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT 29 * NOT MAKE USE OF THIS WORK. 30 * 31 * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED 32 * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN 33 * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES 34 * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING 35 * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND 36 * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE 37 * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS 38 * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992. 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 */ 52 53 /* 54 * Device Driver for AT parallel printer port 55 */ 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/device.h> 60 61 #include <machine/autoconf.h> 62 #include <machine/bus.h> 63 #include <machine/intr.h> 64 65 #include <dev/ic/lptreg.h> 66 #include <dev/ic/lptvar.h> 67 68 #include <arc/jazz/jazziovar.h> 69 70 int lpt_jazzio_probe __P((struct device *, struct cfdata *, void *)); 71 void lpt_jazzio_attach __P((struct device *, struct device *, void *)); 72 73 CFATTACH_DECL(lpt_jazzio, sizeof(struct lpt_softc), 74 lpt_jazzio_probe, lpt_jazzio_attach, NULL, NULL); 75 76 /* 77 * XXX - copied from lpt_isa.c 78 * sys/arch/arm32/mainbus/lpt_pioc.c also copies this. 79 * sys/arch/amiga/dev/lpt_supio.c doesn't. 80 */ 81 static int lpt_port_test __P((bus_space_tag_t, bus_space_handle_t, bus_addr_t, 82 bus_size_t, u_char, u_char)); 83 /* 84 * Internal routine to lptprobe to do port tests of one byte value. 85 */ 86 static int 87 lpt_port_test(iot, ioh, base, off, data, mask) 88 bus_space_tag_t iot; 89 bus_space_handle_t ioh; 90 bus_addr_t base; 91 bus_size_t off; 92 u_char data, mask; 93 { 94 int timeout; 95 u_char temp; 96 97 data &= mask; 98 bus_space_write_1(iot, ioh, off, data); 99 timeout = 1000; 100 do { 101 delay(10); 102 temp = bus_space_read_1(iot, ioh, off) & mask; 103 } while (temp != data && --timeout); 104 return (temp == data); 105 } 106 107 int 108 lpt_jazzio_probe(parent, match, aux) 109 struct device *parent; 110 struct cfdata *match; 111 void *aux; 112 { 113 struct jazzio_attach_args *ja = aux; 114 bus_space_tag_t iot; 115 bus_space_handle_t ioh; 116 bus_addr_t base; 117 u_int8_t mask, data; 118 int i, rv; 119 120 #ifdef DEBUG 121 #define ABORT \ 122 do { \ 123 printf("lpt_jazzio_probe: mask %x data %x failed\n", mask, \ 124 data); \ 125 goto out; \ 126 } while (0) 127 #else 128 #define ABORT goto out 129 #endif 130 131 if(strcmp(ja->ja_name, "lpt") != 0) 132 return (0); 133 134 iot = ja->ja_bust; 135 base = ja->ja_addr; 136 if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh)) 137 return 0; 138 139 rv = 0; 140 mask = 0xff; 141 142 data = 0x55; /* Alternating zeros */ 143 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 144 ABORT; 145 146 data = 0xaa; /* Alternating ones */ 147 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 148 ABORT; 149 150 for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */ 151 data = ~(1 << i); 152 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 153 ABORT; 154 } 155 156 for (i = 0; i < CHAR_BIT; i++) { /* Walking one */ 157 data = (1 << i); 158 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 159 ABORT; 160 } 161 162 bus_space_write_1(iot, ioh, lpt_data, 0); 163 bus_space_write_1(iot, ioh, lpt_control, 0); 164 165 rv = 1; 166 167 out: 168 bus_space_unmap(iot, ioh, LPT_NPORTS); 169 return rv; 170 } 171 172 void 173 lpt_jazzio_attach(parent, self, aux) 174 struct device *parent, *self; 175 void *aux; 176 { 177 struct lpt_softc *sc = (void *)self; 178 struct jazzio_attach_args *ja = aux; 179 bus_space_tag_t iot; 180 bus_space_handle_t ioh; 181 182 printf("\n"); 183 184 sc->sc_state = 0; 185 iot = sc->sc_iot = ja->ja_bust; 186 if (bus_space_map(iot, ja->ja_addr, LPT_NPORTS, 0, &ioh)) { 187 printf("%s: can't map i/o space\n", self->dv_xname); 188 return; 189 } 190 sc->sc_ioh = ioh; 191 192 bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT); 193 194 jazzio_intr_establish(ja->ja_intr, lptintr, sc); 195 } 196