| 1 | /* lp.c 4.20 81/07/25 */ |
| 2 | |
| 3 | #include "lp.h" |
| 4 | #if NLP > 0 |
| 5 | /* |
| 6 | * LP-11 Line printer driver |
| 7 | * |
| 8 | * This driver has been modified to work on printers where |
| 9 | * leaving IENABLE set would cause continuous interrupts. |
| 10 | * |
| 11 | * TODO: |
| 12 | * Test driver on multiple printers |
| 13 | */ |
| 14 | |
| 15 | #include "../h/param.h" |
| 16 | #include "../h/dir.h" |
| 17 | #include "../h/user.h" |
| 18 | #include "../h/buf.h" |
| 19 | #include "../h/systm.h" |
| 20 | #include "../h/map.h" |
| 21 | #include "../h/pte.h" |
| 22 | #include "../h/ubavar.h" |
| 23 | #include "../h/ioctl.h" |
| 24 | #include "../h/tty.h" |
| 25 | |
| 26 | #define LPPRI (PZERO+8) |
| 27 | #define IENABLE 0100 |
| 28 | #define DONE 0200 |
| 29 | #define ERROR 0100000 |
| 30 | #define LPLWAT 650 |
| 31 | #define LPHWAT 800 |
| 32 | |
| 33 | #define MAXCOL 132 |
| 34 | #define CAP 1 |
| 35 | |
| 36 | #define LPUNIT(dev) (minor(dev) >> 3) |
| 37 | |
| 38 | struct lpdevice { |
| 39 | short lpsr; |
| 40 | short lpbuf; |
| 41 | }; |
| 42 | |
| 43 | struct lp_softc { |
| 44 | struct clist sc_outq; |
| 45 | int sc_state; |
| 46 | int sc_physcol; |
| 47 | int sc_logcol; |
| 48 | int sc_physline; |
| 49 | char sc_flags; |
| 50 | int sc_lpchar; |
| 51 | struct buf *sc_inbuf; |
| 52 | } lp_softc[NLP]; |
| 53 | |
| 54 | struct uba_device *lpinfo[NLP]; |
| 55 | |
| 56 | int lpprobe(), lpattach(), lptout(); |
| 57 | u_short lpstd[] = { 0177514 }; |
| 58 | struct uba_driver lpdriver = |
| 59 | { lpprobe, 0, lpattach, 0, lpstd, "lp", lpinfo }; |
| 60 | |
| 61 | /* bits for state */ |
| 62 | #define OPEN 1 /* device is open */ |
| 63 | #define TOUT 2 /* timeout is active */ |
| 64 | #define MOD 4 /* device state has been modified */ |
| 65 | #define ASLP 8 /* awaiting draining of printer */ |
| 66 | |
| 67 | extern lbolt; |
| 68 | int lptout(); |
| 69 | |
| 70 | lpattach(ui) |
| 71 | struct uba_device *ui; |
| 72 | { |
| 73 | register struct lp_softc *sc; |
| 74 | |
| 75 | sc = &lp_softc[ui->ui_unit]; |
| 76 | sc->sc_lpchar = -1; |
| 77 | } |
| 78 | |
| 79 | lpprobe(reg) |
| 80 | caddr_t reg; |
| 81 | { |
| 82 | register int br, cvec; /* value-result */ |
| 83 | register struct lpdevice *lpaddr = (struct lpdevice *)reg; |
| 84 | #ifdef lint |
| 85 | br = 0; cvec = br; br = cvec; |
| 86 | #endif |
| 87 | |
| 88 | lpaddr->lpsr = IENABLE; |
| 89 | DELAY(5); |
| 90 | lpaddr->lpsr = 0; |
| 91 | return (1); |
| 92 | } |
| 93 | |
| 94 | /*ARGSUSED*/ |
| 95 | lpopen(dev, flag) |
| 96 | dev_t dev; |
| 97 | int flag; |
| 98 | { |
| 99 | register int unit; |
| 100 | register struct lpdevice *lpaddr; |
| 101 | register struct lp_softc *sc; |
| 102 | register struct uba_device *ui; |
| 103 | |
| 104 | if ((unit = LPUNIT(dev)) >= NLP || |
| 105 | (sc = &lp_softc[unit])->sc_state&OPEN || |
| 106 | (ui = lpinfo[unit]) == 0 || ui->ui_alive == 0) { |
| 107 | u.u_error = ENXIO; |
| 108 | return; |
| 109 | } |
| 110 | lpaddr = (struct lpdevice *)ui->ui_addr; |
| 111 | if (lpaddr->lpsr&ERROR) { |
| 112 | u.u_error = EIO; |
| 113 | return; |
| 114 | } |
| 115 | sc->sc_state |= OPEN; |
| 116 | sc->sc_inbuf = geteblk(); |
| 117 | sc->sc_flags = minor(dev) & 07; |
| 118 | (void) spl4(); |
| 119 | if ((sc->sc_state&TOUT) == 0) { |
| 120 | sc->sc_state |= TOUT; |
| 121 | timeout(lptout, (caddr_t)dev, 10*hz); |
| 122 | } |
| 123 | (void) spl0(); |
| 124 | lpcanon(dev, '\f'); |
| 125 | } |
| 126 | |
| 127 | /*ARGSUSED*/ |
| 128 | lpclose(dev, flag) |
| 129 | dev_t dev; |
| 130 | int flag; |
| 131 | { |
| 132 | register struct lp_softc *sc = &lp_softc[LPUNIT(dev)]; |
| 133 | |
| 134 | lpcanon(dev, '\f'); |
| 135 | brelse(sc->sc_inbuf); |
| 136 | sc->sc_state &= ~OPEN; |
| 137 | } |
| 138 | |
| 139 | lpwrite(dev) |
| 140 | dev_t dev; |
| 141 | { |
| 142 | register unsigned n; |
| 143 | register char *cp; |
| 144 | register struct lp_softc *sc = &lp_softc[LPUNIT(dev)]; |
| 145 | |
| 146 | while (n = min(BSIZE, u.u_count)) { |
| 147 | cp = sc->sc_inbuf->b_un.b_addr; |
| 148 | iomove(cp, n, B_WRITE); |
| 149 | do |
| 150 | lpcanon(dev, *cp++); |
| 151 | while (--n); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | lpcanon(dev, c) |
| 156 | dev_t dev; |
| 157 | register int c; |
| 158 | { |
| 159 | register int logcol, physcol; |
| 160 | register struct lp_softc *sc = &lp_softc[LPUNIT(dev)]; |
| 161 | |
| 162 | if (sc->sc_flags&CAP) { |
| 163 | register c2; |
| 164 | |
| 165 | if (c>='a' && c<='z') |
| 166 | c += 'A'-'a'; else |
| 167 | switch (c) { |
| 168 | |
| 169 | case '{': |
| 170 | c2 = '('; |
| 171 | goto esc; |
| 172 | |
| 173 | case '}': |
| 174 | c2 = ')'; |
| 175 | goto esc; |
| 176 | |
| 177 | case '`': |
| 178 | c2 = '\''; |
| 179 | goto esc; |
| 180 | |
| 181 | case '|': |
| 182 | c2 = '!'; |
| 183 | goto esc; |
| 184 | |
| 185 | case '~': |
| 186 | c2 = '^'; |
| 187 | |
| 188 | esc: |
| 189 | lpcanon(dev, c2); |
| 190 | sc->sc_logcol--; |
| 191 | c = '-'; |
| 192 | } |
| 193 | } |
| 194 | logcol = sc->sc_logcol; |
| 195 | physcol = sc->sc_physcol; |
| 196 | if (c == ' ') |
| 197 | logcol++; |
| 198 | else switch(c) { |
| 199 | |
| 200 | case '\t': |
| 201 | logcol = (logcol+8) & ~7; |
| 202 | break; |
| 203 | |
| 204 | case '\f': |
| 205 | if (sc->sc_physline == 0 && physcol == 0) |
| 206 | break; |
| 207 | /* fall into ... */ |
| 208 | |
| 209 | case '\n': |
| 210 | lpoutput(dev, c); |
| 211 | if (c == '\f') |
| 212 | sc->sc_physline = 0; |
| 213 | else |
| 214 | sc->sc_physline++; |
| 215 | physcol = 0; |
| 216 | /* fall into ... */ |
| 217 | |
| 218 | case '\r': |
| 219 | logcol = 0; |
| 220 | (void) spl4(); |
| 221 | lpintr(LPUNIT(dev)); |
| 222 | (void) spl0(); |
| 223 | break; |
| 224 | |
| 225 | case '\b': |
| 226 | if (logcol > 0) |
| 227 | logcol--; |
| 228 | break; |
| 229 | |
| 230 | default: |
| 231 | if (logcol < physcol) { |
| 232 | lpoutput(dev, '\r'); |
| 233 | physcol = 0; |
| 234 | } |
| 235 | if (logcol < MAXCOL) { |
| 236 | while (logcol > physcol) { |
| 237 | lpoutput(dev, ' '); |
| 238 | physcol++; |
| 239 | } |
| 240 | lpoutput(dev, c); |
| 241 | physcol++; |
| 242 | } |
| 243 | logcol++; |
| 244 | } |
| 245 | if (logcol > 1000) /* ignore long lines */ |
| 246 | logcol = 1000; |
| 247 | sc->sc_logcol = logcol; |
| 248 | sc->sc_physcol = physcol; |
| 249 | } |
| 250 | |
| 251 | lpoutput(dev, c) |
| 252 | dev_t dev; |
| 253 | int c; |
| 254 | { |
| 255 | register struct lp_softc *sc = &lp_softc[LPUNIT(dev)]; |
| 256 | |
| 257 | if (sc->sc_outq.c_cc >= LPHWAT) { |
| 258 | (void) spl4(); |
| 259 | lpintr(LPUNIT(dev)); /* unchoke */ |
| 260 | while (sc->sc_outq.c_cc >= LPHWAT) { |
| 261 | sc->sc_state |= ASLP; /* must be ERROR */ |
| 262 | sleep((caddr_t)sc, LPPRI); |
| 263 | } |
| 264 | (void) spl0(); |
| 265 | } |
| 266 | while (putc(c, &sc->sc_outq)) |
| 267 | sleep((caddr_t)&lbolt, LPPRI); |
| 268 | } |
| 269 | |
| 270 | lpintr(lp11) |
| 271 | int lp11; |
| 272 | { |
| 273 | register int n; |
| 274 | register struct lp_softc *sc = &lp_softc[lp11]; |
| 275 | register struct uba_device *ui = lpinfo[lp11]; |
| 276 | register struct lpdevice *lpaddr = (struct lpdevice *)ui->ui_addr; |
| 277 | |
| 278 | lpaddr->lpsr &= ~IENABLE; |
| 279 | n = sc->sc_outq.c_cc; |
| 280 | if (sc->sc_lpchar < 0) |
| 281 | sc->sc_lpchar = getc(&sc->sc_outq); |
| 282 | while ((lpaddr->lpsr&DONE) && sc->sc_lpchar >= 0) { |
| 283 | lpaddr->lpbuf = sc->sc_lpchar; |
| 284 | sc->sc_lpchar = getc(&sc->sc_outq); |
| 285 | } |
| 286 | sc->sc_state |= MOD; |
| 287 | if (sc->sc_outq.c_cc > 0 && (lpaddr->lpsr&ERROR)==0) |
| 288 | lpaddr->lpsr |= IENABLE; /* ok and more to do later */ |
| 289 | if (n>LPLWAT && sc->sc_outq.c_cc<=LPLWAT && sc->sc_state&ASLP) { |
| 290 | sc->sc_state &= ~ASLP; |
| 291 | wakeup((caddr_t)sc); /* top half should go on */ |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | lptout(dev) |
| 296 | dev_t dev; |
| 297 | { |
| 298 | register struct lp_softc *sc; |
| 299 | register struct uba_device *ui; |
| 300 | register struct lpdevice *lpaddr; |
| 301 | |
| 302 | sc = &lp_softc[LPUNIT(dev)]; |
| 303 | ui = lpinfo[LPUNIT(dev)]; |
| 304 | lpaddr = (struct lpdevice *) ui->ui_addr; |
| 305 | if ((sc->sc_state&MOD) != 0) { |
| 306 | sc->sc_state &= ~MOD; /* something happened */ |
| 307 | timeout(lptout, (caddr_t)dev, 2*hz); /* so don't sweat */ |
| 308 | return; |
| 309 | } |
| 310 | if ((sc->sc_state&OPEN) == 0) { |
| 311 | sc->sc_state &= ~TOUT; /* no longer open */ |
| 312 | lpaddr->lpsr = 0; |
| 313 | return; |
| 314 | } |
| 315 | if (sc->sc_outq.c_cc && (lpaddr->lpsr&DONE) && (lpaddr->lpsr&ERROR)==0) |
| 316 | lpintr(LPUNIT(dev)); /* ready to go */ |
| 317 | timeout(lptout, (caddr_t)dev, 10*hz); |
| 318 | } |
| 319 | |
| 320 | lpreset(uban) |
| 321 | int uban; |
| 322 | { |
| 323 | register struct uba_device *ui; |
| 324 | register struct lpdevice *lpaddr; |
| 325 | register int unit; |
| 326 | |
| 327 | for (unit = 0; unit < NLP; unit++) { |
| 328 | if ((ui = lpinfo[unit]) == 0 || ui->ui_ubanum != uban || |
| 329 | ui->ui_alive == 0) |
| 330 | continue; |
| 331 | printf(" lp%d", unit); |
| 332 | lpaddr = (struct lpdevice *)ui->ui_addr; |
| 333 | lpaddr->lpsr |= IENABLE; |
| 334 | } |
| 335 | } |