1 /* $NetBSD: lpt_jazzio.c,v 1.1 2000/12/24 09:25:29 ur 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 struct cfattach lpt_jazzio_ca = { 74 sizeof(struct lpt_softc), lpt_jazzio_probe, lpt_jazzio_attach 75 }; 76 77 /* 78 * XXX - copied from lpt_isa.c 79 * sys/arch/arm32/mainbus/lpt_pioc.c also copies this. 80 * sys/arch/amiga/dev/lpt_supio.c doesn't. 81 */ 82 static int lpt_port_test __P((bus_space_tag_t, bus_space_handle_t, bus_addr_t, 83 bus_size_t, u_char, u_char)); 84 /* 85 * Internal routine to lptprobe to do port tests of one byte value. 86 */ 87 static int 88 lpt_port_test(iot, ioh, base, off, data, mask) 89 bus_space_tag_t iot; 90 bus_space_handle_t ioh; 91 bus_addr_t base; 92 bus_size_t off; 93 u_char data, mask; 94 { 95 int timeout; 96 u_char temp; 97 98 data &= mask; 99 bus_space_write_1(iot, ioh, off, data); 100 timeout = 1000; 101 do { 102 delay(10); 103 temp = bus_space_read_1(iot, ioh, off) & mask; 104 } while (temp != data && --timeout); 105 return (temp == data); 106 } 107 108 int 109 lpt_jazzio_probe(parent, match, aux) 110 struct device *parent; 111 struct cfdata *match; 112 void *aux; 113 { 114 struct jazzio_attach_args *ja = aux; 115 bus_space_tag_t iot; 116 bus_space_handle_t ioh; 117 bus_addr_t base; 118 u_int8_t mask, data; 119 int i, rv; 120 121 #ifdef DEBUG 122 #define ABORT \ 123 do { \ 124 printf("lpt_jazzio_probe: mask %x data %x failed\n", mask, \ 125 data); \ 126 goto out; \ 127 } while (0) 128 #else 129 #define ABORT goto out 130 #endif 131 132 if(strcmp(ja->ja_name, "lpt") != 0) 133 return (0); 134 135 iot = ja->ja_bust; 136 base = ja->ja_addr; 137 if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh)) 138 return 0; 139 140 rv = 0; 141 mask = 0xff; 142 143 data = 0x55; /* Alternating zeros */ 144 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 145 ABORT; 146 147 data = 0xaa; /* Alternating ones */ 148 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 149 ABORT; 150 151 for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */ 152 data = ~(1 << i); 153 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 154 ABORT; 155 } 156 157 for (i = 0; i < CHAR_BIT; i++) { /* Walking one */ 158 data = (1 << i); 159 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 160 ABORT; 161 } 162 163 bus_space_write_1(iot, ioh, lpt_data, 0); 164 bus_space_write_1(iot, ioh, lpt_control, 0); 165 166 rv = 1; 167 168 out: 169 bus_space_unmap(iot, ioh, LPT_NPORTS); 170 return rv; 171 } 172 173 void 174 lpt_jazzio_attach(parent, self, aux) 175 struct device *parent, *self; 176 void *aux; 177 { 178 struct lpt_softc *sc = (void *)self; 179 struct jazzio_attach_args *ja = aux; 180 bus_space_tag_t iot; 181 bus_space_handle_t ioh; 182 183 printf("\n"); 184 185 sc->sc_state = 0; 186 iot = sc->sc_iot = ja->ja_bust; 187 if (bus_space_map(iot, ja->ja_addr, LPT_NPORTS, 0, &ioh)) { 188 printf("%s: can't map i/o space\n", self->dv_xname); 189 return; 190 } 191 sc->sc_ioh = ioh; 192 193 bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT); 194 195 jazzio_intr_establish(ja->ja_intr, lptintr, sc); 196 } 197