1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)lp.c 7.3 (Berkeley) 05/09/89 7 */ 8 9 #include "lp.h" 10 #if NLP > 0 11 /* 12 * LP-11 Line printer driver 13 * 14 * This driver has been modified to work on printers where 15 * leaving IENABLE set would cause continuous interrupts. 16 */ 17 #include "machine/pte.h" 18 19 #include "param.h" 20 #include "dir.h" 21 #include "user.h" 22 #include "buf.h" 23 #include "systm.h" 24 #include "map.h" 25 #include "uio.h" 26 #include "ioctl.h" 27 #include "tty.h" 28 #include "kernel.h" 29 30 #include "ubavar.h" 31 32 #define LPPRI (PZERO+8) 33 #define IENABLE 0100 34 #define DONE 0200 35 #define ERROR 0100000 36 #define LPLWAT 650 37 #define LPHWAT 800 38 39 #define LPBUFSIZE 1024 40 #define MAXCOL 132 41 #define CAP 1 42 43 #define LPUNIT(dev) (minor(dev) >> 3) 44 45 struct lpdevice { 46 short lpsr; 47 short lpbuf; 48 }; 49 50 struct lp_softc { 51 struct clist sc_outq; 52 int sc_state; 53 int sc_physcol; 54 int sc_logcol; 55 int sc_physline; 56 char sc_flags; 57 short sc_maxcol; 58 int sc_lpchar; 59 struct buf *sc_inbuf; 60 } lp_softc[NLP]; 61 62 struct uba_device *lpinfo[NLP]; 63 64 int lpprobe(), lpattach(), lptout(); 65 u_short lpstd[] = { 0177514, 0 }; 66 struct uba_driver lpdriver = 67 { lpprobe, 0, lpattach, 0, lpstd, "lp", lpinfo }; 68 69 /* bits for state */ 70 #define OPEN 1 /* device is open */ 71 #define TOUT 2 /* timeout is active */ 72 #define MOD 4 /* device state has been modified */ 73 #define ASLP 8 /* awaiting draining of printer */ 74 75 lpattach(ui) 76 struct uba_device *ui; 77 { 78 register struct lp_softc *sc; 79 80 sc = &lp_softc[ui->ui_unit]; 81 sc->sc_lpchar = -1; 82 if (ui->ui_flags) 83 sc->sc_maxcol = ui->ui_flags; 84 else 85 sc->sc_maxcol = MAXCOL; 86 } 87 88 lpprobe(reg) 89 caddr_t reg; 90 { 91 register int br, cvec; /* value-result */ 92 register struct lpdevice *lpaddr = (struct lpdevice *)reg; 93 #ifdef lint 94 br = 0; cvec = br; br = cvec; 95 lpintr(0); 96 #endif 97 98 lpaddr->lpsr = IENABLE; 99 DELAY(5); 100 lpaddr->lpsr = 0; 101 return (sizeof (struct lpdevice)); 102 } 103 104 /*ARGSUSED*/ 105 lpopen(dev, flag) 106 dev_t dev; 107 int flag; 108 { 109 register struct lpdevice *lpaddr; 110 register struct lp_softc *sc; 111 register struct uba_device *ui; 112 register int unit, s; 113 114 if ((unit = LPUNIT(dev)) >= NLP || 115 (sc = &lp_softc[unit])->sc_state&OPEN || 116 (ui = lpinfo[unit]) == 0 || ui->ui_alive == 0) 117 return (ENXIO); 118 lpaddr = (struct lpdevice *)ui->ui_addr; 119 if (lpaddr->lpsr&ERROR) 120 return (EIO); 121 sc->sc_state |= OPEN; 122 sc->sc_inbuf = geteblk(LPBUFSIZE); 123 sc->sc_flags = minor(dev) & 07; 124 s = spl4(); 125 if ((sc->sc_state&TOUT) == 0) { 126 sc->sc_state |= TOUT; 127 timeout(lptout, (caddr_t)dev, 10*hz); 128 } 129 splx(s); 130 lpcanon(dev, '\f'); 131 return (0); 132 } 133 134 /*ARGSUSED*/ 135 lpclose(dev, flag) 136 dev_t dev; 137 int flag; 138 { 139 register struct lp_softc *sc = &lp_softc[LPUNIT(dev)]; 140 141 lpcanon(dev, '\f'); 142 brelse(sc->sc_inbuf); 143 sc->sc_state &= ~OPEN; 144 } 145 146 lpwrite(dev, uio) 147 dev_t dev; 148 struct uio *uio; 149 { 150 register unsigned n; 151 register char *cp; 152 register struct lp_softc *sc = &lp_softc[LPUNIT(dev)]; 153 int error; 154 155 while (n = MIN(LPBUFSIZE, (unsigned)uio->uio_resid)) { 156 cp = sc->sc_inbuf->b_un.b_addr; 157 error = uiomove(cp, (int)n, uio); 158 if (error) 159 return (error); 160 do 161 lpcanon(dev, *cp++); 162 while (--n); 163 } 164 return (0); 165 } 166 167 lpcanon(dev, c) 168 dev_t dev; 169 register int c; 170 { 171 register struct lp_softc *sc = &lp_softc[LPUNIT(dev)]; 172 register int logcol, physcol, s; 173 174 if (sc->sc_flags&CAP) { 175 register c2; 176 177 if (c>='a' && c<='z') 178 c += 'A'-'a'; else 179 switch (c) { 180 181 case '{': 182 c2 = '('; 183 goto esc; 184 185 case '}': 186 c2 = ')'; 187 goto esc; 188 189 case '`': 190 c2 = '\''; 191 goto esc; 192 193 case '|': 194 c2 = '!'; 195 goto esc; 196 197 case '~': 198 c2 = '^'; 199 200 esc: 201 lpcanon(dev, c2); 202 sc->sc_logcol--; 203 c = '-'; 204 } 205 } 206 logcol = sc->sc_logcol; 207 physcol = sc->sc_physcol; 208 if (c == ' ') 209 logcol++; 210 else switch(c) { 211 212 case '\t': 213 logcol = (logcol+8) & ~7; 214 break; 215 216 case '\f': 217 if (sc->sc_physline == 0 && physcol == 0) 218 break; 219 /* fall into ... */ 220 221 case '\n': 222 lpoutput(dev, c); 223 if (c == '\f') 224 sc->sc_physline = 0; 225 else 226 sc->sc_physline++; 227 physcol = 0; 228 /* fall into ... */ 229 230 case '\r': 231 s = spl4(); 232 logcol = 0; 233 lpintr(LPUNIT(dev)); 234 splx(s); 235 break; 236 237 case '\b': 238 if (logcol > 0) 239 logcol--; 240 break; 241 242 default: 243 if (logcol < physcol) { 244 lpoutput(dev, '\r'); 245 physcol = 0; 246 } 247 if (logcol < sc->sc_maxcol) { 248 while (logcol > physcol) { 249 lpoutput(dev, ' '); 250 physcol++; 251 } 252 lpoutput(dev, c); 253 physcol++; 254 } 255 logcol++; 256 } 257 if (logcol > 1000) /* ignore long lines */ 258 logcol = 1000; 259 sc->sc_logcol = logcol; 260 sc->sc_physcol = physcol; 261 } 262 263 lpoutput(dev, c) 264 dev_t dev; 265 int c; 266 { 267 register struct lp_softc *sc = &lp_softc[LPUNIT(dev)]; 268 int s; 269 270 if (sc->sc_outq.c_cc >= LPHWAT) { 271 s = spl4(); 272 lpintr(LPUNIT(dev)); /* unchoke */ 273 while (sc->sc_outq.c_cc >= LPHWAT) { 274 sc->sc_state |= ASLP; /* must be ERROR */ 275 sleep((caddr_t)sc, LPPRI); 276 } 277 splx(s); 278 } 279 while (putc(c, &sc->sc_outq)) 280 sleep((caddr_t)&lbolt, LPPRI); 281 } 282 283 lpintr(lp11) 284 int lp11; 285 { 286 register int n; 287 register struct lp_softc *sc = &lp_softc[lp11]; 288 register struct uba_device *ui = lpinfo[lp11]; 289 register struct lpdevice *lpaddr = (struct lpdevice *)ui->ui_addr; 290 291 lpaddr->lpsr &= ~IENABLE; 292 n = sc->sc_outq.c_cc; 293 if (sc->sc_lpchar < 0) 294 sc->sc_lpchar = getc(&sc->sc_outq); 295 while ((lpaddr->lpsr&DONE) && sc->sc_lpchar >= 0) { 296 lpaddr->lpbuf = sc->sc_lpchar; 297 sc->sc_lpchar = getc(&sc->sc_outq); 298 } 299 sc->sc_state |= MOD; 300 if (sc->sc_outq.c_cc > 0 && (lpaddr->lpsr&ERROR)==0) 301 lpaddr->lpsr |= IENABLE; /* ok and more to do later */ 302 if (n>LPLWAT && sc->sc_outq.c_cc<=LPLWAT && sc->sc_state&ASLP) { 303 sc->sc_state &= ~ASLP; 304 wakeup((caddr_t)sc); /* top half should go on */ 305 } 306 } 307 308 lptout(dev) 309 dev_t dev; 310 { 311 register struct lp_softc *sc; 312 register struct uba_device *ui; 313 register struct lpdevice *lpaddr; 314 315 sc = &lp_softc[LPUNIT(dev)]; 316 ui = lpinfo[LPUNIT(dev)]; 317 lpaddr = (struct lpdevice *) ui->ui_addr; 318 if ((sc->sc_state&MOD) != 0) { 319 sc->sc_state &= ~MOD; /* something happened */ 320 timeout(lptout, (caddr_t)dev, 2*hz); /* so don't sweat */ 321 return; 322 } 323 if ((sc->sc_state&OPEN) == 0 && sc->sc_outq.c_cc == 0) { 324 sc->sc_state &= ~TOUT; /* no longer open */ 325 lpaddr->lpsr = 0; 326 return; 327 } 328 if (sc->sc_outq.c_cc && (lpaddr->lpsr&DONE) && (lpaddr->lpsr&ERROR)==0) 329 lpintr(LPUNIT(dev)); /* ready to go */ 330 timeout(lptout, (caddr_t)dev, 10*hz); 331 } 332 333 lpreset(uban) 334 int uban; 335 { 336 register struct uba_device *ui; 337 register struct lpdevice *lpaddr; 338 register int unit; 339 340 for (unit = 0; unit < NLP; unit++) { 341 if ((ui = lpinfo[unit]) == 0 || ui->ui_ubanum != uban || 342 ui->ui_alive == 0) 343 continue; 344 printf(" lp%d", unit); 345 lpaddr = (struct lpdevice *)ui->ui_addr; 346 lpaddr->lpsr |= IENABLE; 347 } 348 } 349 #endif 350