lpt_isa.c revision 1.64
1 /* $NetBSD: lpt_isa.c,v 1.64 2007/10/19 12:00:20 ad Exp $ */ 2 3 /* 4 * Copyright (c) 1993, 1994 Charles M. Hannum. 5 * Copyright (c) 1990 William F. Jolitz, TeleMuse 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This software is a component of "386BSD" developed by 19 * William F. Jolitz, TeleMuse. 20 * 4. Neither the name of the developer nor the name "386BSD" 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ 25 * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS 26 * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. 27 * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT 28 * NOT MAKE USE OF THIS WORK. 29 * 30 * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED 31 * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN 32 * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES 33 * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING 34 * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND 35 * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE 36 * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS 37 * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992. 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND 40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 42 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE 43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 45 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 47 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 48 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 49 * SUCH DAMAGE. 50 */ 51 52 /* 53 * Device Driver for AT parallel printer port 54 */ 55 56 #include <sys/cdefs.h> 57 __KERNEL_RCSID(0, "$NetBSD: lpt_isa.c,v 1.64 2007/10/19 12:00:20 ad Exp $"); 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/proc.h> 62 #include <sys/user.h> 63 #include <sys/buf.h> 64 #include <sys/kernel.h> 65 #include <sys/ioctl.h> 66 #include <sys/uio.h> 67 #include <sys/device.h> 68 #include <sys/syslog.h> 69 70 #include <sys/bus.h> 71 #include <sys/intr.h> 72 73 #include <dev/isa/isavar.h> 74 #include <dev/ic/lptreg.h> 75 #include <dev/ic/lptvar.h> 76 77 #define LPTPRI (PZERO+8) 78 #define LPT_BSIZE 1024 79 80 #ifndef LPTDEBUG 81 #define LPRINTF(a) 82 #else 83 #define LPRINTF(a) if (lpt_isa_debug) printf a 84 int lpt_isa_debug = 0; 85 #endif 86 87 struct lpt_isa_softc { 88 struct lpt_softc sc_lpt; 89 int sc_irq; 90 91 }; 92 93 int lpt_isa_probe(struct device *, struct cfdata *, void *); 94 void lpt_isa_attach(struct device *, struct device *, void *); 95 96 CFATTACH_DECL(lpt_isa, sizeof(struct lpt_isa_softc), 97 lpt_isa_probe, lpt_isa_attach, NULL, NULL); 98 99 int lpt_port_test(bus_space_tag_t, bus_space_handle_t, bus_addr_t, 100 bus_size_t, u_char, u_char); 101 102 /* 103 * Internal routine to lptprobe to do port tests of one byte value. 104 */ 105 int 106 lpt_port_test(bus_space_tag_t iot, bus_space_handle_t ioh, 107 bus_addr_t base, bus_size_t off, u_char data, u_char mask) 108 { 109 int timeout; 110 u_char temp; 111 112 data &= mask; 113 bus_space_write_1(iot, ioh, off, data); 114 timeout = 1000; 115 do { 116 delay(10); 117 temp = bus_space_read_1(iot, ioh, off) & mask; 118 } while (temp != data && --timeout); 119 LPRINTF(("lpt: port=0x%x out=0x%x in=0x%x timeout=%d\n", 120 (unsigned)(base + off), (unsigned)data, (unsigned)temp, timeout)); 121 return (temp == data); 122 } 123 124 /* 125 * Logic: 126 * 1) You should be able to write to and read back the same value 127 * to the data port. Do an alternating zeros, alternating ones, 128 * walking zero, and walking one test to check for stuck bits. 129 * 130 * 2) You should be able to write to and read back the same value 131 * to the control port lower 5 bits, the upper 3 bits are reserved 132 * per the IBM PC technical reference manauls and different boards 133 * do different things with them. Do an alternating zeros, alternating 134 * ones, walking zero, and walking one test to check for stuck bits. 135 * 136 * Some printers drag the strobe line down when the are powered off 137 * so this bit has been masked out of the control port test. 138 * 139 * XXX Some printers may not like a fast pulse on init or strobe, I 140 * don't know at this point, if that becomes a problem these bits 141 * should be turned off in the mask byte for the control port test. 142 * 143 * 3) Set the data and control ports to a value of 0 144 */ 145 int 146 lpt_isa_probe(struct device *parent, struct cfdata *match, 147 void *aux) 148 { 149 struct isa_attach_args *ia = aux; 150 bus_space_tag_t iot; 151 bus_space_handle_t ioh; 152 u_long base; 153 u_char mask, data; 154 int i, rv; 155 156 #ifdef LPT_DEBUG 157 #define ABORT do {printf("lptprobe: mask %x data %x failed\n", mask, data); \ 158 goto out;} while (0) 159 #else 160 #define ABORT goto out 161 #endif 162 163 if (ia->ia_nio < 1) 164 return (0); 165 166 if (ISA_DIRECT_CONFIG(ia)) 167 return (0); 168 169 /* Disallow wildcarded i/o address. */ 170 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 171 return (0); 172 173 iot = ia->ia_iot; 174 base = ia->ia_io[0].ir_addr; 175 if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh)) 176 return 0; 177 178 rv = 0; 179 mask = 0xff; 180 181 data = 0x55; /* Alternating zeros */ 182 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 183 ABORT; 184 185 data = 0xaa; /* Alternating ones */ 186 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 187 ABORT; 188 189 for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */ 190 data = ~(1 << i); 191 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 192 ABORT; 193 } 194 195 for (i = 0; i < CHAR_BIT; i++) { /* Walking one */ 196 data = (1 << i); 197 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 198 ABORT; 199 } 200 201 bus_space_write_1(iot, ioh, lpt_data, 0); 202 bus_space_write_1(iot, ioh, lpt_control, 0); 203 204 ia->ia_io[0].ir_size = LPT_NPORTS; 205 206 ia->ia_niomem = 0; 207 ia->ia_ndrq = 0; 208 209 rv = 1; 210 211 out: 212 bus_space_unmap(iot, ioh, LPT_NPORTS); 213 return rv; 214 } 215 216 void 217 lpt_isa_attach(struct device *parent, struct device *self, void *aux) 218 { 219 struct lpt_isa_softc *sc = (void *)self; 220 struct lpt_softc *lsc = &sc->sc_lpt; 221 struct isa_attach_args *ia = aux; 222 bus_space_tag_t iot; 223 bus_space_handle_t ioh; 224 225 if (ia->ia_nirq < 1 || 226 ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) { 227 sc->sc_irq = -1; 228 printf(": polled\n"); 229 } else { 230 sc->sc_irq = ia->ia_irq[0].ir_irq; 231 printf("\n"); 232 } 233 234 iot = lsc->sc_iot = ia->ia_iot; 235 if (bus_space_map(iot, ia->ia_io[0].ir_addr, LPT_NPORTS, 0, &ioh)) { 236 printf("%s: can't map i/o space\n", self->dv_xname); 237 return; 238 } 239 lsc->sc_ioh = ioh; 240 241 lpt_attach_subr(lsc); 242 243 if (sc->sc_irq != -1) 244 lsc->sc_ih = isa_intr_establish(ia->ia_ic, sc->sc_irq, 245 IST_EDGE, IPL_TTY, lptintr, lsc); 246 } 247
Indexes created Tue Sep 30 20:09:53 GMT 2025