lpt_mvme.c revision 1.2.2.2
1 1.2.2.2 jdolecek /* $NetBSD: lpt_mvme.c,v 1.2.2.2 2002/10/10 18:40:14 jdolecek Exp $ */ 2 1.2.2.2 jdolecek 3 1.2.2.2 jdolecek /*- 4 1.2.2.2 jdolecek * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc. 5 1.2.2.2 jdolecek * All rights reserved. 6 1.2.2.2 jdolecek * 7 1.2.2.2 jdolecek * This code is derived from software contributed to The NetBSD Foundation 8 1.2.2.2 jdolecek * by Steve C. Woodford. 9 1.2.2.2 jdolecek * 10 1.2.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 jdolecek * modification, are permitted provided that the following conditions 12 1.2.2.2 jdolecek * are met: 13 1.2.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 jdolecek * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 jdolecek * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 jdolecek * documentation and/or other materials provided with the distribution. 18 1.2.2.2 jdolecek * 3. All advertising materials mentioning features or use of this software 19 1.2.2.2 jdolecek * must display the following acknowledgement: 20 1.2.2.2 jdolecek * This product includes software developed by the NetBSD 21 1.2.2.2 jdolecek * Foundation, Inc. and its contributors. 22 1.2.2.2 jdolecek * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2.2.2 jdolecek * contributors may be used to endorse or promote products derived 24 1.2.2.2 jdolecek * from this software without specific prior written permission. 25 1.2.2.2 jdolecek * 26 1.2.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2.2.2 jdolecek * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2.2.2 jdolecek * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2.2.2 jdolecek * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2.2.2 jdolecek * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2.2.2 jdolecek * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2.2.2 jdolecek * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2.2.2 jdolecek * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2.2.2 jdolecek * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2.2.2 jdolecek * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2.2.2 jdolecek * POSSIBILITY OF SUCH DAMAGE. 37 1.2.2.2 jdolecek */ 38 1.2.2.2 jdolecek 39 1.2.2.2 jdolecek /* 40 1.2.2.2 jdolecek * Copyright (c) 1993, 1994 Charles M. Hannum. 41 1.2.2.2 jdolecek * Copyright (c) 1990 William F. Jolitz, TeleMuse 42 1.2.2.2 jdolecek * All rights reserved. 43 1.2.2.2 jdolecek * 44 1.2.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 45 1.2.2.2 jdolecek * modification, are permitted provided that the following conditions 46 1.2.2.2 jdolecek * are met: 47 1.2.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 48 1.2.2.2 jdolecek * notice, this list of conditions and the following disclaimer. 49 1.2.2.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 50 1.2.2.2 jdolecek * notice, this list of conditions and the following disclaimer in the 51 1.2.2.2 jdolecek * documentation and/or other materials provided with the distribution. 52 1.2.2.2 jdolecek * 3. All advertising materials mentioning features or use of this software 53 1.2.2.2 jdolecek * must display the following acknowledgement: 54 1.2.2.2 jdolecek * This software is a component of "386BSD" developed by 55 1.2.2.2 jdolecek * William F. Jolitz, TeleMuse. 56 1.2.2.2 jdolecek * 4. Neither the name of the developer nor the name "386BSD" 57 1.2.2.2 jdolecek * may be used to endorse or promote products derived from this software 58 1.2.2.2 jdolecek * without specific prior written permission. 59 1.2.2.2 jdolecek * 60 1.2.2.2 jdolecek * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ 61 1.2.2.2 jdolecek * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS 62 1.2.2.2 jdolecek * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. 63 1.2.2.2 jdolecek * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT 64 1.2.2.2 jdolecek * NOT MAKE USE OF THIS WORK. 65 1.2.2.2 jdolecek * 66 1.2.2.2 jdolecek * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED 67 1.2.2.2 jdolecek * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN 68 1.2.2.2 jdolecek * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES 69 1.2.2.2 jdolecek * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING 70 1.2.2.2 jdolecek * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND 71 1.2.2.2 jdolecek * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE 72 1.2.2.2 jdolecek * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS 73 1.2.2.2 jdolecek * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992. 74 1.2.2.2 jdolecek * 75 1.2.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND 76 1.2.2.2 jdolecek * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 77 1.2.2.2 jdolecek * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 78 1.2.2.2 jdolecek * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE 79 1.2.2.2 jdolecek * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 80 1.2.2.2 jdolecek * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 81 1.2.2.2 jdolecek * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 82 1.2.2.2 jdolecek * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 83 1.2.2.2 jdolecek * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 84 1.2.2.2 jdolecek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 85 1.2.2.2 jdolecek * SUCH DAMAGE. 86 1.2.2.2 jdolecek */ 87 1.2.2.2 jdolecek 88 1.2.2.2 jdolecek /* 89 1.2.2.2 jdolecek * Device Driver for an MVME68K/MVME88K board's parallel printer port 90 1.2.2.2 jdolecek * This driver attaches above the board-specific back-end. 91 1.2.2.2 jdolecek */ 92 1.2.2.2 jdolecek 93 1.2.2.2 jdolecek #include <sys/param.h> 94 1.2.2.2 jdolecek #include <sys/systm.h> 95 1.2.2.2 jdolecek #include <sys/proc.h> 96 1.2.2.2 jdolecek #include <sys/user.h> 97 1.2.2.2 jdolecek #include <sys/buf.h> 98 1.2.2.2 jdolecek #include <sys/kernel.h> 99 1.2.2.2 jdolecek #include <sys/ioctl.h> 100 1.2.2.2 jdolecek #include <sys/uio.h> 101 1.2.2.2 jdolecek #include <sys/device.h> 102 1.2.2.2 jdolecek #include <sys/conf.h> 103 1.2.2.2 jdolecek #include <sys/syslog.h> 104 1.2.2.2 jdolecek 105 1.2.2.2 jdolecek #include <machine/cpu.h> 106 1.2.2.2 jdolecek #include <machine/bus.h> 107 1.2.2.2 jdolecek 108 1.2.2.2 jdolecek #include <dev/mvme/lptvar.h> 109 1.2.2.2 jdolecek 110 1.2.2.2 jdolecek 111 1.2.2.2 jdolecek #define TIMEOUT hz*16 /* wait up to 16 seconds for a ready */ 112 1.2.2.2 jdolecek #define STEP hz/4 113 1.2.2.2 jdolecek 114 1.2.2.2 jdolecek #define LPTPRI (PZERO+8) 115 1.2.2.2 jdolecek #define LPT_BSIZE 1024 116 1.2.2.2 jdolecek 117 1.2.2.2 jdolecek #if !defined(DEBUG) || !defined(notdef) 118 1.2.2.2 jdolecek #define LPRINTF(a) 119 1.2.2.2 jdolecek #else 120 1.2.2.2 jdolecek #define LPRINTF if (lptdebug) printf a 121 1.2.2.2 jdolecek int lptdebug = 1; 122 1.2.2.2 jdolecek #endif 123 1.2.2.2 jdolecek 124 1.2.2.2 jdolecek #define LPTUNIT(s) (minor(s) & 0x0f) 125 1.2.2.2 jdolecek #define LPTFLAGS(s) (minor(s) & 0xf0) 126 1.2.2.2 jdolecek 127 1.2.2.2 jdolecek static void lpt_wakeup __P((void *arg)); 128 1.2.2.2 jdolecek static int pushbytes __P((struct lpt_softc *)); 129 1.2.2.2 jdolecek 130 1.2.2.2 jdolecek extern struct cfdriver lpt_cd; 131 1.2.2.2 jdolecek 132 1.2.2.2 jdolecek dev_type_open(lptopen); 133 1.2.2.2 jdolecek dev_type_close(lptclose); 134 1.2.2.2 jdolecek dev_type_write(lptwrite); 135 1.2.2.2 jdolecek dev_type_ioctl(lptioctl); 136 1.2.2.2 jdolecek 137 1.2.2.2 jdolecek const struct cdevsw lpt_cdevsw = { 138 1.2.2.2 jdolecek lptopen, lptclose, noread, lptwrite, lptioctl, 139 1.2.2.2 jdolecek nostop, notty, nopoll, nommap, nokqfilter, 140 1.2.2.2 jdolecek }; 141 1.2.2.2 jdolecek 142 1.2.2.2 jdolecek void 143 1.2.2.2 jdolecek lpt_attach_subr(sc) 144 1.2.2.2 jdolecek struct lpt_softc *sc; 145 1.2.2.2 jdolecek { 146 1.2.2.2 jdolecek 147 1.2.2.2 jdolecek sc->sc_state = 0; 148 1.2.2.2 jdolecek callout_init(&sc->sc_wakeup_ch); 149 1.2.2.2 jdolecek } 150 1.2.2.2 jdolecek 151 1.2.2.2 jdolecek /* 152 1.2.2.2 jdolecek * Reset the printer, then wait until it's selected and not busy. 153 1.2.2.2 jdolecek */ 154 1.2.2.2 jdolecek int 155 1.2.2.2 jdolecek lptopen(dev, flag, mode, p) 156 1.2.2.2 jdolecek dev_t dev; 157 1.2.2.2 jdolecek int flag; 158 1.2.2.2 jdolecek int mode; 159 1.2.2.2 jdolecek struct proc *p; 160 1.2.2.2 jdolecek { 161 1.2.2.2 jdolecek int unit; 162 1.2.2.2 jdolecek u_char flags; 163 1.2.2.2 jdolecek struct lpt_softc *sc; 164 1.2.2.2 jdolecek int error; 165 1.2.2.2 jdolecek int spin; 166 1.2.2.2 jdolecek 167 1.2.2.2 jdolecek unit = LPTUNIT(dev); 168 1.2.2.2 jdolecek flags = LPTFLAGS(dev); 169 1.2.2.2 jdolecek 170 1.2.2.2 jdolecek if (unit >= lpt_cd.cd_ndevs) 171 1.2.2.2 jdolecek return (ENXIO); 172 1.2.2.2 jdolecek sc = lpt_cd.cd_devs[unit]; 173 1.2.2.2 jdolecek if (!sc) 174 1.2.2.2 jdolecek return (ENXIO); 175 1.2.2.2 jdolecek 176 1.2.2.2 jdolecek #ifdef DIAGNOSTIC 177 1.2.2.2 jdolecek if (sc->sc_state) 178 1.2.2.2 jdolecek printf("%s: stat=0x%x not zero\n", sc->sc_dev.dv_xname, 179 1.2.2.2 jdolecek sc->sc_state); 180 1.2.2.2 jdolecek #endif 181 1.2.2.2 jdolecek 182 1.2.2.2 jdolecek if (sc->sc_state) 183 1.2.2.2 jdolecek return (EBUSY); 184 1.2.2.2 jdolecek 185 1.2.2.2 jdolecek sc->sc_state = LPT_INIT; 186 1.2.2.2 jdolecek sc->sc_flags = flags; 187 1.2.2.2 jdolecek LPRINTF(("%s: open: flags=0x%x\n", sc->sc_dev.dv_xname, flags)); 188 1.2.2.2 jdolecek 189 1.2.2.2 jdolecek if ((flags & LPT_NOPRIME) == 0) { 190 1.2.2.2 jdolecek /* assert Input Prime for 100 usec to start up printer */ 191 1.2.2.2 jdolecek (sc->sc_funcs->lf_iprime) (sc); 192 1.2.2.2 jdolecek } 193 1.2.2.2 jdolecek 194 1.2.2.2 jdolecek /* select fast or slow strobe depending on minor device number */ 195 1.2.2.2 jdolecek if (flags & LPT_FAST_STROBE) 196 1.2.2.2 jdolecek (sc->sc_funcs->lf_speed) (sc, LPT_STROBE_FAST); 197 1.2.2.2 jdolecek else 198 1.2.2.2 jdolecek (sc->sc_funcs->lf_speed) (sc, LPT_STROBE_SLOW); 199 1.2.2.2 jdolecek 200 1.2.2.2 jdolecek /* wait till ready (printer running diagnostics) */ 201 1.2.2.2 jdolecek for (spin = 0; (sc->sc_funcs->lf_notrdy) (sc, 1); spin += STEP) { 202 1.2.2.2 jdolecek if (spin >= TIMEOUT) { 203 1.2.2.2 jdolecek sc->sc_state = 0; 204 1.2.2.2 jdolecek return (EBUSY); 205 1.2.2.2 jdolecek } 206 1.2.2.2 jdolecek /* wait 1/4 second, give up if we get a signal */ 207 1.2.2.2 jdolecek error = tsleep((caddr_t) sc, LPTPRI | PCATCH, "lptopen", STEP); 208 1.2.2.2 jdolecek if (error != EWOULDBLOCK) { 209 1.2.2.2 jdolecek sc->sc_state = 0; 210 1.2.2.2 jdolecek return (error); 211 1.2.2.2 jdolecek } 212 1.2.2.2 jdolecek } 213 1.2.2.2 jdolecek 214 1.2.2.2 jdolecek sc->sc_inbuf = geteblk(LPT_BSIZE); 215 1.2.2.2 jdolecek sc->sc_count = 0; 216 1.2.2.2 jdolecek sc->sc_state = LPT_OPEN; 217 1.2.2.2 jdolecek 218 1.2.2.2 jdolecek if ((sc->sc_flags & LPT_NOINTR) == 0) 219 1.2.2.2 jdolecek lpt_wakeup(sc); 220 1.2.2.2 jdolecek 221 1.2.2.2 jdolecek (sc->sc_funcs->lf_open) (sc, sc->sc_flags & LPT_NOINTR); 222 1.2.2.2 jdolecek 223 1.2.2.2 jdolecek LPRINTF(("%s: opened\n", sc->sc_dev.dv_xname)); 224 1.2.2.2 jdolecek return (0); 225 1.2.2.2 jdolecek } 226 1.2.2.2 jdolecek 227 1.2.2.2 jdolecek void 228 1.2.2.2 jdolecek lpt_wakeup(arg) 229 1.2.2.2 jdolecek void *arg; 230 1.2.2.2 jdolecek { 231 1.2.2.2 jdolecek struct lpt_softc *sc; 232 1.2.2.2 jdolecek int s; 233 1.2.2.2 jdolecek 234 1.2.2.2 jdolecek sc = arg; 235 1.2.2.2 jdolecek 236 1.2.2.2 jdolecek s = spltty(); 237 1.2.2.2 jdolecek lpt_intr(sc); 238 1.2.2.2 jdolecek splx(s); 239 1.2.2.2 jdolecek 240 1.2.2.2 jdolecek callout_reset(&sc->sc_wakeup_ch, STEP, lpt_wakeup, sc); 241 1.2.2.2 jdolecek } 242 1.2.2.2 jdolecek 243 1.2.2.2 jdolecek /* 244 1.2.2.2 jdolecek * Close the device, and free the local line buffer. 245 1.2.2.2 jdolecek */ 246 1.2.2.2 jdolecek int 247 1.2.2.2 jdolecek lptclose(dev, flag, mode, p) 248 1.2.2.2 jdolecek dev_t dev; 249 1.2.2.2 jdolecek int flag; 250 1.2.2.2 jdolecek int mode; 251 1.2.2.2 jdolecek struct proc *p; 252 1.2.2.2 jdolecek { 253 1.2.2.2 jdolecek struct lpt_softc *sc; 254 1.2.2.2 jdolecek int unit; 255 1.2.2.2 jdolecek 256 1.2.2.2 jdolecek unit = LPTUNIT(dev); 257 1.2.2.2 jdolecek sc = lpt_cd.cd_devs[unit]; 258 1.2.2.2 jdolecek 259 1.2.2.2 jdolecek if (sc->sc_count) 260 1.2.2.2 jdolecek (void) pushbytes(sc); 261 1.2.2.2 jdolecek 262 1.2.2.2 jdolecek if ((sc->sc_flags & LPT_NOINTR) == 0) 263 1.2.2.2 jdolecek callout_stop(&sc->sc_wakeup_ch); 264 1.2.2.2 jdolecek 265 1.2.2.2 jdolecek (sc->sc_funcs->lf_close) (sc); 266 1.2.2.2 jdolecek 267 1.2.2.2 jdolecek sc->sc_state = 0; 268 1.2.2.2 jdolecek brelse(sc->sc_inbuf); 269 1.2.2.2 jdolecek 270 1.2.2.2 jdolecek LPRINTF(("%s: closed\n", sc->sc_dev.dv_xname)); 271 1.2.2.2 jdolecek return (0); 272 1.2.2.2 jdolecek } 273 1.2.2.2 jdolecek 274 1.2.2.2 jdolecek int 275 1.2.2.2 jdolecek pushbytes(sc) 276 1.2.2.2 jdolecek struct lpt_softc *sc; 277 1.2.2.2 jdolecek { 278 1.2.2.2 jdolecek int s, error, spin, tic; 279 1.2.2.2 jdolecek 280 1.2.2.2 jdolecek if (sc->sc_flags & LPT_NOINTR) { 281 1.2.2.2 jdolecek while (sc->sc_count > 0) { 282 1.2.2.2 jdolecek spin = 0; 283 1.2.2.2 jdolecek while ((sc->sc_funcs->lf_notrdy) (sc, 0)) { 284 1.2.2.2 jdolecek if (++spin < sc->sc_spinmax) 285 1.2.2.2 jdolecek continue; 286 1.2.2.2 jdolecek tic = 0; 287 1.2.2.2 jdolecek /* adapt busy-wait algorithm */ 288 1.2.2.2 jdolecek sc->sc_spinmax++; 289 1.2.2.2 jdolecek while ((sc->sc_funcs->lf_notrdy) (sc, 1)) { 290 1.2.2.2 jdolecek /* exponential backoff */ 291 1.2.2.2 jdolecek tic = tic + tic + 1; 292 1.2.2.2 jdolecek if (tic > TIMEOUT) 293 1.2.2.2 jdolecek tic = TIMEOUT; 294 1.2.2.2 jdolecek error = tsleep((caddr_t) sc, 295 1.2.2.2 jdolecek LPTPRI | PCATCH, "lptpsh", tic); 296 1.2.2.2 jdolecek if (error != EWOULDBLOCK) 297 1.2.2.2 jdolecek return (error); 298 1.2.2.2 jdolecek } 299 1.2.2.2 jdolecek break; 300 1.2.2.2 jdolecek } 301 1.2.2.2 jdolecek 302 1.2.2.2 jdolecek (sc->sc_funcs->lf_wrdata) (sc, *sc->sc_cp++); 303 1.2.2.2 jdolecek sc->sc_count--; 304 1.2.2.2 jdolecek 305 1.2.2.2 jdolecek /* adapt busy-wait algorithm */ 306 1.2.2.2 jdolecek if (spin * 2 + 16 < sc->sc_spinmax) 307 1.2.2.2 jdolecek sc->sc_spinmax--; 308 1.2.2.2 jdolecek } 309 1.2.2.2 jdolecek } else { 310 1.2.2.2 jdolecek while (sc->sc_count > 0) { 311 1.2.2.2 jdolecek /* if the printer is ready for a char, give it one */ 312 1.2.2.2 jdolecek if ((sc->sc_state & LPT_OBUSY) == 0) { 313 1.2.2.2 jdolecek LPRINTF(("%s: write %d\n", sc->sc_dev.dv_xname, 314 1.2.2.2 jdolecek sc->sc_count)); 315 1.2.2.2 jdolecek s = spltty(); 316 1.2.2.2 jdolecek (void) lpt_intr(sc); 317 1.2.2.2 jdolecek splx(s); 318 1.2.2.2 jdolecek } 319 1.2.2.2 jdolecek error = tsleep((caddr_t) sc, LPTPRI | PCATCH, 320 1.2.2.2 jdolecek "lptwrite2", 0); 321 1.2.2.2 jdolecek if (error) 322 1.2.2.2 jdolecek return (error); 323 1.2.2.2 jdolecek } 324 1.2.2.2 jdolecek } 325 1.2.2.2 jdolecek return (0); 326 1.2.2.2 jdolecek } 327 1.2.2.2 jdolecek 328 1.2.2.2 jdolecek /* 329 1.2.2.2 jdolecek * Copy a line from user space to a local buffer, then call putc to get the 330 1.2.2.2 jdolecek * chars moved to the output queue. 331 1.2.2.2 jdolecek */ 332 1.2.2.2 jdolecek int 333 1.2.2.2 jdolecek lptwrite(dev, uio, flags) 334 1.2.2.2 jdolecek dev_t dev; 335 1.2.2.2 jdolecek struct uio *uio; 336 1.2.2.2 jdolecek int flags; 337 1.2.2.2 jdolecek { 338 1.2.2.2 jdolecek struct lpt_softc *sc; 339 1.2.2.2 jdolecek size_t n; 340 1.2.2.2 jdolecek int error; 341 1.2.2.2 jdolecek 342 1.2.2.2 jdolecek sc = lpt_cd.cd_devs[LPTUNIT(dev)]; 343 1.2.2.2 jdolecek error = 0; 344 1.2.2.2 jdolecek 345 1.2.2.2 jdolecek while ((n = min(LPT_BSIZE, uio->uio_resid)) != 0) { 346 1.2.2.2 jdolecek uiomove(sc->sc_cp = sc->sc_inbuf->b_data, n, uio); 347 1.2.2.2 jdolecek sc->sc_count = n; 348 1.2.2.2 jdolecek error = pushbytes(sc); 349 1.2.2.2 jdolecek if (error) { 350 1.2.2.2 jdolecek /* 351 1.2.2.2 jdolecek * Return accurate residual if interrupted or timed 352 1.2.2.2 jdolecek * out. 353 1.2.2.2 jdolecek */ 354 1.2.2.2 jdolecek uio->uio_resid += sc->sc_count; 355 1.2.2.2 jdolecek sc->sc_count = 0; 356 1.2.2.2 jdolecek return (error); 357 1.2.2.2 jdolecek } 358 1.2.2.2 jdolecek } 359 1.2.2.2 jdolecek return (0); 360 1.2.2.2 jdolecek } 361 1.2.2.2 jdolecek 362 1.2.2.2 jdolecek /* 363 1.2.2.2 jdolecek * Handle printer interrupts which occur when the printer is ready to accept 364 1.2.2.2 jdolecek * another char. 365 1.2.2.2 jdolecek */ 366 1.2.2.2 jdolecek int 367 1.2.2.2 jdolecek lpt_intr(sc) 368 1.2.2.2 jdolecek struct lpt_softc *sc; 369 1.2.2.2 jdolecek { 370 1.2.2.2 jdolecek 371 1.2.2.2 jdolecek if (sc->sc_count) { 372 1.2.2.2 jdolecek /* send char */ 373 1.2.2.2 jdolecek (sc->sc_funcs->lf_wrdata) (sc, *sc->sc_cp++); 374 1.2.2.2 jdolecek sc->sc_count--; 375 1.2.2.2 jdolecek sc->sc_state |= LPT_OBUSY; 376 1.2.2.2 jdolecek } else 377 1.2.2.2 jdolecek sc->sc_state &= ~LPT_OBUSY; 378 1.2.2.2 jdolecek 379 1.2.2.2 jdolecek if (sc->sc_count == 0) { 380 1.2.2.2 jdolecek /* none, wake up the top half to get more */ 381 1.2.2.2 jdolecek wakeup((caddr_t) sc); 382 1.2.2.2 jdolecek } 383 1.2.2.2 jdolecek 384 1.2.2.2 jdolecek return (1); 385 1.2.2.2 jdolecek } 386 1.2.2.2 jdolecek 387 1.2.2.2 jdolecek /* ARGSUSED */ 388 1.2.2.2 jdolecek int 389 1.2.2.2 jdolecek lptioctl(dev, cmd, data, flag, p) 390 1.2.2.2 jdolecek dev_t dev; 391 1.2.2.2 jdolecek u_long cmd; 392 1.2.2.2 jdolecek caddr_t data; 393 1.2.2.2 jdolecek int flag; 394 1.2.2.2 jdolecek struct proc *p; 395 1.2.2.2 jdolecek { 396 1.2.2.2 jdolecek 397 1.2.2.2 jdolecek return (ENODEV); 398 1.2.2.2 jdolecek } 399
Indexes created Wed Oct 22 13:09:56 GMT 2025