| 1 | /* |
| 2 | * Copyright (c) 1990 William F. Jolitz, TeleMuse |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This software is a component of "386BSD" developed by |
| 16 | * William F. Jolitz, TeleMuse. |
| 17 | * 4. Neither the name of the developer nor the name "386BSD" |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ |
| 22 | * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS |
| 23 | * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. |
| 24 | * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT |
| 25 | * NOT MAKE USE OF THIS WORK. |
| 26 | * |
| 27 | * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED |
| 28 | * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN |
| 29 | * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES |
| 30 | * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING |
| 31 | * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND |
| 32 | * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE |
| 33 | * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS |
| 34 | * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992. |
| 35 | * |
| 36 | * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND |
| 37 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 38 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 39 | * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE |
| 40 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 41 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 42 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 43 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 44 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 45 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 46 | * SUCH DAMAGE. |
| 47 | * |
| 48 | */ |
| 49 | */ |
| 50 | |
| 51 | /* |
| 52 | * Device Driver for AT parallel printer port |
| 53 | * Written by William Jolitz 12/18/90 |
| 54 | */ |
| 55 | |
| 56 | #include "lpt.h" |
| 57 | #if NLPT > 0 |
| 58 | |
| 59 | #include "param.h" |
| 60 | #include "user.h" |
| 61 | #include "buf.h" |
| 62 | #include "systm.h" |
| 63 | #include "kernel.h" |
| 64 | #include "ioctl.h" |
| 65 | #include "tty.h" |
| 66 | #include "uio.h" |
| 67 | |
| 68 | #include "i386/isa/isa_device.h" |
| 69 | #include "i386/isa/lptreg.h" |
| 70 | |
| 71 | #define LPINITRDY 4 /* wait up to 4 seconds for a ready */ |
| 72 | #define LPTOUTTIME 4 /* wait up to 4 seconds for a ready */ |
| 73 | #define LPPRI (PZERO+8) |
| 74 | #define BUFSIZE 1024 |
| 75 | |
| 76 | #ifndef DEBUG |
| 77 | #define lprintf |
| 78 | #else |
| 79 | #define lprintf if (lpflag) printf |
| 80 | #endif |
| 81 | |
| 82 | int lptout(); |
| 83 | #ifdef DEBUG |
| 84 | int lpflag = 1; |
| 85 | #endif |
| 86 | |
| 87 | int lptprobe(), lptattach(), lptintr(); |
| 88 | |
| 89 | struct isa_driver lptdriver = { |
| 90 | lptprobe, lptattach, "lpt" |
| 91 | }; |
| 92 | |
| 93 | #define LPTUNIT(s) (((s)>>6)&0x3) |
| 94 | #define LPTFLAGS(s) ((s)&0x3f) |
| 95 | |
| 96 | struct lpt_softc { |
| 97 | short sc_port; |
| 98 | short sc_state; |
| 99 | /* default case: negative prime, negative ack, handshake strobe, |
| 100 | prime once */ |
| 101 | u_char sc_control; |
| 102 | char sc_flags; |
| 103 | #define LP_POS_INIT 0x01 /* if we are a postive init signal */ |
| 104 | #define LP_POS_ACK 0x02 /* if we are a positive going ack */ |
| 105 | #define LP_NO_PRIME 0x04 /* don't prime the printer at all */ |
| 106 | #define LP_PRIMEOPEN 0x08 /* prime on every open */ |
| 107 | #define LP_AUTOLF 0x10 /* tell printer to do an automatic lf */ |
| 108 | #define LP_BYPASS 0x20 /* bypass printer ready checks */ |
| 109 | struct buf *sc_inbuf; |
| 110 | short sc_xfercnt ; |
| 111 | char sc_primed; |
| 112 | char *sc_cp ; |
| 113 | } lpt_sc[NLPT] ; |
| 114 | |
| 115 | /* bits for state */ |
| 116 | #define OPEN (1<<0) /* device is open */ |
| 117 | #define ASLP (1<<1) /* awaiting draining of printer */ |
| 118 | #define ERROR (1<<2) /* error was received from printer */ |
| 119 | #define OBUSY (1<<3) /* printer is busy doing output */ |
| 120 | #define LPTOUT (1<<4) /* timeout while not selected */ |
| 121 | #define TOUT (1<<5) /* timeout while not selected */ |
| 122 | #define INIT (1<<6) /* waiting to initialize for open */ |
| 123 | |
| 124 | lptprobe(idp) |
| 125 | struct isa_device *idp; |
| 126 | { unsigned v; |
| 127 | |
| 128 | outb(idp->id_iobase+lpt_status,0xf0); |
| 129 | v = inb(idp->id_iobase+lpt_status); |
| 130 | outb(idp->id_iobase+lpt_status,0); |
| 131 | if (inb(idp->id_iobase+lpt_status) == v) { |
| 132 | outb(idp->id_iobase+lpt_control,0xff); |
| 133 | DELAY(100); |
| 134 | if (inb(idp->id_iobase+lpt_control) != 0xff) |
| 135 | return(0); |
| 136 | outb(idp->id_iobase+lpt_control,0); |
| 137 | DELAY(100); |
| 138 | if (inb(idp->id_iobase+lpt_control) != 0xe0) |
| 139 | return(0); |
| 140 | return(1); |
| 141 | } |
| 142 | return(0); |
| 143 | } |
| 144 | |
| 145 | lptattach(isdp) |
| 146 | struct isa_device *isdp; |
| 147 | { |
| 148 | struct lpt_softc *sc; |
| 149 | |
| 150 | sc = lpt_sc + isdp->id_unit; |
| 151 | sc->sc_port = isdp->id_iobase; |
| 152 | outb(sc->sc_port+lpt_control, LPC_NINIT); |
| 153 | return (1); |
| 154 | } |
| 155 | |
| 156 | /* |
| 157 | * lptopen -- reset the printer, then wait until it's selected and not busy. |
| 158 | */ |
| 159 | |
| 160 | lptopen(dev, flag) |
| 161 | dev_t dev; |
| 162 | int flag; |
| 163 | { |
| 164 | struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); |
| 165 | int s; |
| 166 | int trys, port; |
| 167 | |
| 168 | if (sc->sc_state) { |
| 169 | lprintf("lp: still open\n") ; |
| 170 | printf("still open %x\n", sc->sc_state); |
| 171 | return(EBUSY); |
| 172 | } else sc->sc_state |= INIT; |
| 173 | |
| 174 | s = spltty(); |
| 175 | sc->sc_flags = LPTFLAGS(minor(dev)); |
| 176 | lprintf("lp flags 0x%x\n", sc->sc_flags); |
| 177 | port = sc->sc_port; |
| 178 | |
| 179 | /* init printer */ |
| 180 | if((sc->sc_flags & LP_NO_PRIME) == 0) { |
| 181 | if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { |
| 182 | outb(port+lpt_control, 0); |
| 183 | sc->sc_primed++; |
| 184 | DELAY(500); |
| 185 | } |
| 186 | } |
| 187 | outb(port+lpt_control, LPC_SEL|LPC_NINIT); |
| 188 | |
| 189 | /* wait till ready (printer running diagnostics) */ |
| 190 | trys = 0; |
| 191 | do { |
| 192 | /* ran out of waiting for the printer */ |
| 193 | if (trys++ >= LPINITRDY*4) { |
| 194 | splx(s); |
| 195 | sc->sc_state = 0; |
| 196 | printf ("status %x\n", inb(port+lpt_status) ); |
| 197 | return (EBUSY); |
| 198 | } |
| 199 | |
| 200 | /* wait 1/4 second, give up if we get a signal */ |
| 201 | if (tsleep (sc, LPPRI|PCATCH, "lptinit", hz/4) != EWOULDBLOCK) { |
| 202 | sc->sc_state = 0; |
| 203 | splx(s); |
| 204 | return (EBUSY); |
| 205 | } |
| 206 | |
| 207 | /* is printer online and ready for output */ |
| 208 | } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != |
| 209 | (LPS_SEL|LPS_NBSY|LPS_NERR)); |
| 210 | |
| 211 | if(sc->sc_flags&LP_AUTOLF) { |
| 212 | outb(port+lpt_control, LPC_SEL|LPC_NINIT|LPC_ENA|LPC_AUTOL); |
| 213 | sc->sc_control = LPC_SEL|LPC_NINIT|LPC_ENA|LPC_AUTOL; |
| 214 | } else { |
| 215 | outb(port+lpt_control, LPC_SEL|LPC_NINIT|LPC_ENA); |
| 216 | sc->sc_control = LPC_SEL|LPC_NINIT|LPC_ENA; |
| 217 | } |
| 218 | |
| 219 | sc->sc_state = OPEN | TOUT; |
| 220 | sc->sc_inbuf = geteblk(BUFSIZE); |
| 221 | sc->sc_xfercnt = 0; |
| 222 | splx(s); |
| 223 | timeout (lptout, sc, hz/2); |
| 224 | lprintf("opened.\n"); |
| 225 | return(0); |
| 226 | } |
| 227 | |
| 228 | lptout (sc) |
| 229 | struct lpt_softc *sc; |
| 230 | { int pl; |
| 231 | |
| 232 | lprintf ("T %x ", inb(sc->sc_port+lpt_status)); |
| 233 | if (sc->sc_state&OPEN) |
| 234 | timeout (lptout, sc, hz/2); |
| 235 | else sc->sc_state &= ~TOUT; |
| 236 | |
| 237 | if (sc->sc_state & ERROR) |
| 238 | sc->sc_state &= ~ERROR; |
| 239 | |
| 240 | /* |
| 241 | * Avoid possible hangs do to missed interrupts |
| 242 | */ |
| 243 | if (sc->sc_xfercnt) { |
| 244 | pl = spltty(); |
| 245 | lptintr(sc - lpt_sc); |
| 246 | splx(pl); |
| 247 | } else { |
| 248 | sc->sc_state &= ~OBUSY; |
| 249 | wakeup((caddr_t)sc); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | * lptclose -- close the device, free the local line buffer. |
| 255 | */ |
| 256 | |
| 257 | lptclose(dev, flag) |
| 258 | int flag; |
| 259 | { |
| 260 | struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); |
| 261 | int port = sc->sc_port; |
| 262 | |
| 263 | sc->sc_state &= ~OPEN; |
| 264 | while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != |
| 265 | (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) |
| 266 | /* wait 1/4 second, give up if we get a signal */ |
| 267 | if (tsleep (sc, LPPRI|PCATCH, "lpclose", hz) != EWOULDBLOCK) |
| 268 | break; |
| 269 | |
| 270 | sc->sc_state = 0; |
| 271 | sc->sc_xfercnt = 0; |
| 272 | outb(sc->sc_port+lpt_control, LPC_NINIT); |
| 273 | brelse(sc->sc_inbuf); |
| 274 | lprintf("closed.\n"); |
| 275 | return(0); |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | * lptwrite --copy a line from user space to a local buffer, then call |
| 280 | * putc to get the chars moved to the output queue. |
| 281 | */ |
| 282 | |
| 283 | lptwrite(dev, uio) |
| 284 | dev_t dev; |
| 285 | struct uio *uio; |
| 286 | { |
| 287 | register unsigned n; |
| 288 | int pl, err; |
| 289 | struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); |
| 290 | |
| 291 | while (n = MIN(BUFSIZE, uio->uio_resid)) { |
| 292 | sc->sc_cp = sc->sc_inbuf->b_un.b_addr ; |
| 293 | uiomove(sc->sc_cp, n, uio); |
| 294 | sc->sc_xfercnt = n ; |
| 295 | while (sc->sc_xfercnt > 0) { |
| 296 | /* if the printer is ready for a char, give it one */ |
| 297 | if ((sc->sc_state & OBUSY) == 0){ |
| 298 | lprintf("\nC %d. ", sc->sc_xfercnt); |
| 299 | pl = spltty(); |
| 300 | lptintr(sc - lpt_sc); |
| 301 | (void) splx(pl); |
| 302 | } |
| 303 | lprintf("W "); |
| 304 | if (err = tsleep (sc, LPPRI|PCATCH, "lpwrite", 0)) |
| 305 | return(err); |
| 306 | } |
| 307 | } |
| 308 | return(0); |
| 309 | } |
| 310 | |
| 311 | /* |
| 312 | * lptintr -- handle printer interrupts which occur when the printer is |
| 313 | * ready to accept another char. |
| 314 | */ |
| 315 | |
| 316 | lptintr(unit) |
| 317 | { |
| 318 | struct lpt_softc *sc = lpt_sc + unit; |
| 319 | int port = sc->sc_port,sts; |
| 320 | |
| 321 | /* is printer online and ready for output */ |
| 322 | if (((sts=inb(port+lpt_status)) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR/*|LPS_NACK*/)) == |
| 323 | (LPS_SEL|LPS_NBSY|LPS_NERR)) { |
| 324 | /* is this a false interrupt ? */ |
| 325 | if ((sc->sc_state & OBUSY) |
| 326 | && (sts & LPS_NACK) == 0) return; |
| 327 | sc->sc_state |= OBUSY; sc->sc_state &= ~ERROR; |
| 328 | |
| 329 | if (sc->sc_xfercnt) { |
| 330 | /* send char */ |
| 331 | /*lprintf("%x ", *sc->sc_cp); */ |
| 332 | outb(port+lpt_data, *sc->sc_cp++) ; sc->sc_xfercnt-- ; |
| 333 | outb(port+lpt_control, sc->sc_control|LPC_STB); |
| 334 | /* DELAY(X) */ |
| 335 | outb(port+lpt_control, sc->sc_control); |
| 336 | } |
| 337 | |
| 338 | /* any more bytes for the printer? */ |
| 339 | if (sc->sc_xfercnt > 0) return; |
| 340 | |
| 341 | /* none, wake up the top half to get more */ |
| 342 | sc->sc_state &= ~OBUSY; |
| 343 | wakeup((caddr_t)sc); |
| 344 | lprintf("w "); |
| 345 | return; |
| 346 | } else sc->sc_state |= ERROR; |
| 347 | lprintf("sts %x ", sts); |
| 348 | } |
| 349 | |
| 350 | #endif NLP |