ss_mustek.c revision 1.17
1 /* $NetBSD: ss_mustek.c,v 1.17 2001/11/13 06:56:41 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Joachim Koenig-Baltes. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Joachim Koenig-Baltes. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * special driver for MUSTEK flatbed scanners MFS 06000CX and MFS 12000CX 34 * these scanners come with their own scsi card, containing an NCR53C400 35 * SCSI controller chip. I'm in the progress of writing a driver for this 36 * card to work under NetBSD-current. I've hooked it up to a Seagate ST01 37 * hostadapter in the meantime, giving 350KB/sec for higher resolutions! 38 * 39 * I tried to connect it to my Adaptec 1542B, but with no success. It seems, 40 * it does not like synchronous negotiation between Hostadapter and other 41 * targets, but I could not turn this off for the 1542B. 42 * 43 * There is also an other reason why you would not like to connect it to your 44 * favourite SCSI host adapter: The Mustek DOES NOT DISCONNECT. It will block 45 * other traffic from the bus while a transfer is active. 46 */ 47 48 #include <sys/cdefs.h> 49 __KERNEL_RCSID(0, "$NetBSD: ss_mustek.c,v 1.17 2001/11/13 06:56:41 lukem Exp $"); 50 51 #include <sys/types.h> 52 #include <sys/param.h> 53 #include <sys/kernel.h> 54 #include <sys/systm.h> 55 #include <sys/fcntl.h> 56 #include <sys/errno.h> 57 #include <sys/ioctl.h> 58 #include <sys/malloc.h> 59 #include <sys/buf.h> 60 #include <sys/proc.h> 61 #include <sys/user.h> 62 #include <sys/device.h> 63 #include <sys/conf.h> /* for cdevsw */ 64 #include <sys/scanio.h> 65 66 #include <dev/scsipi/scsi_all.h> 67 #include <dev/scsipi/scsipi_all.h> 68 #include <dev/scsipi/scsi_scanner.h> 69 #include <dev/scsipi/scsiconf.h> 70 #include <dev/scsipi/ssvar.h> 71 #include <dev/scsipi/ss_mustek.h> 72 73 #define MUSTEK_RETRIES 4 74 75 int mustek_get_params __P((struct ss_softc *)); 76 int mustek_set_params __P((struct ss_softc *, struct scan_io *)); 77 int mustek_trigger_scanner __P((struct ss_softc *)); 78 void mustek_minphys __P((struct ss_softc *, struct buf *)); 79 int mustek_read __P((struct ss_softc *, struct buf *)); 80 int mustek_rewind_scanner __P((struct ss_softc *)); 81 82 /* only used internally */ 83 int mustek_get_status __P((struct ss_softc *, int, int)); 84 void mustek_compute_sizes __P((struct ss_softc *)); 85 86 /* 87 * structure for the special handlers 88 */ 89 struct ss_special mustek_special = { 90 mustek_set_params, 91 mustek_trigger_scanner, 92 mustek_get_params, 93 mustek_minphys, 94 mustek_read, 95 mustek_rewind_scanner, 96 NULL, /* no adf support right now */ 97 NULL /* no adf support right now */ 98 }; 99 100 /* 101 * mustek_attach: attach special functions to ss 102 */ 103 void 104 mustek_attach(ss, sa) 105 struct ss_softc *ss; 106 struct scsipibus_attach_args *sa; 107 { 108 #ifdef SCSIPI_DEBUG 109 struct scsipi_periph *periph = sa->sa_periph; 110 #endif 111 112 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_attach: start\n")); 113 ss->sio.scan_scanner_type = 0; 114 115 printf("\n%s: ", ss->sc_dev.dv_xname); 116 117 /* first, check the model which determines resolutions */ 118 if (!memcmp(sa->sa_inqbuf.product, "MFS-06000CX", 11)) { 119 ss->sio.scan_scanner_type = MUSTEK_06000CX; 120 printf("Mustek 6000CX Flatbed 3-pass color scanner, 3 - 600 dpi\n"); 121 } 122 if (!memcmp(sa->sa_inqbuf.product, "MFS-12000CX", 11)) { 123 ss->sio.scan_scanner_type = MUSTEK_12000CX; 124 printf("Mustek 12000CX Flatbed 3-pass color scanner, 6 - 1200 dpi\n"); 125 } 126 127 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_attach: scanner_type = %d\n", 128 ss->sio.scan_scanner_type)); 129 130 /* install special handlers */ 131 ss->special = &mustek_special; 132 133 /* 134 * populate the scanio struct with legal values 135 * the default should come from user space 136 */ 137 ss->sio.scan_width = 1200; 138 ss->sio.scan_height = 1200; 139 ss->sio.scan_x_resolution = 99; 140 ss->sio.scan_y_resolution = 99; 141 ss->sio.scan_x_origin = 0; 142 ss->sio.scan_y_origin = 0; 143 ss->sio.scan_brightness = 100; 144 ss->sio.scan_contrast = 100; 145 ss->sio.scan_quality = 100; 146 ss->sio.scan_image_mode = SIM_GRAYSCALE; 147 148 mustek_compute_sizes(ss); 149 } 150 151 int 152 mustek_get_params (ss) 153 struct ss_softc *ss; 154 { 155 156 return (0); 157 } 158 159 /* 160 * check the parameters if the mustek is capable of fulfilling it 161 * but don't send the command to the scanner in case the user wants 162 * to change parameters by more than one call 163 */ 164 int 165 mustek_set_params(ss, sio) 166 struct ss_softc *ss; 167 struct scan_io *sio; 168 { 169 int error; 170 171 /* 172 * if the scanner is triggered, then rewind it 173 */ 174 if (ss->flags & SSF_TRIGGERED) { 175 error = mustek_rewind_scanner(ss); 176 if (error) 177 return (error); 178 } 179 180 /* size constraints: 8.5" horizontally and 14" vertically */ 181 #ifdef MUSTEK_INCH_SPEC 182 /* sizes must be a multiple of 1/8" */ 183 sio->scan_x_origin -= sio->scan_x_origin % 150; 184 sio->scan_y_origin -= sio->scan_y_origin % 150; 185 sio->scan_width -= sio->scan_width % 150; 186 sio->scan_height -= sio->scan_height % 150; 187 #endif 188 if (sio->scan_width == 0 || 189 sio->scan_x_origin + sio->scan_width > 10200 || 190 sio->scan_height == 0 || 191 sio->scan_y_origin + sio->scan_height > 16800) 192 return (EINVAL); 193 194 /* 195 * for now, only realize the values for the MUSTEK_06000CX 196 * in the future, values for the MUSTEK_12000CX will be implemented 197 */ 198 199 /* 200 * resolution (dpi) must be <= 300 and a multiple of 3 or 201 * between 300 and 600 and a multiple of 30 202 */ 203 sio->scan_x_resolution -= sio->scan_x_resolution <= 300 ? 204 sio->scan_x_resolution % 3 : sio->scan_x_resolution % 30; 205 sio->scan_y_resolution -= sio->scan_y_resolution <= 300 ? 206 sio->scan_y_resolution % 3 : sio->scan_y_resolution % 30; 207 if (sio->scan_x_resolution < 3 || sio->scan_x_resolution > 600 || 208 sio->scan_x_resolution != sio->scan_y_resolution) 209 return (EINVAL); 210 211 /* assume brightness values are between 64 and 136 in steps of 3 */ 212 sio->scan_brightness -= (sio->scan_brightness - 64) % 3; 213 if (sio->scan_brightness < 64 || sio->scan_brightness > 136) 214 return (EINVAL); 215 216 /* contrast values must be between 16 and 184 in steps of 7 */ 217 sio->scan_contrast -= (sio->scan_contrast - 16) % 7; 218 if (sio->scan_contrast < 16 || sio->scan_contrast > 184) 219 return (EINVAL); 220 221 /* 222 * velocity: between 0 (fast) and 4 (slow) which will be mapped 223 * to 100% = 4, 80% = 3, 60% = 2, 40% = 1, 20% = 0 224 * must be a multiple of 20 225 */ 226 sio->scan_quality -= sio->scan_quality % 20; 227 if (sio->scan_quality < 20 || sio->scan_quality > 100) 228 return (EINVAL); 229 230 switch (sio->scan_image_mode) { 231 case SIM_BINARY_MONOCHROME: 232 case SIM_DITHERED_MONOCHROME: 233 case SIM_GRAYSCALE: 234 case SIM_RED: 235 case SIM_GREEN: 236 case SIM_BLUE: 237 break; 238 default: 239 return (EINVAL); 240 } 241 242 /* change ss_softc to the new values, but save ro-variables */ 243 sio->scan_scanner_type = ss->sio.scan_scanner_type; 244 memcpy(&ss->sio, sio, sizeof(struct scan_io)); 245 246 mustek_compute_sizes(ss); 247 248 return (0); 249 } 250 251 /* 252 * trim the requested transfer to a multiple of the line size 253 * this is called only from ssread() which guarantees, scanner is triggered 254 * In the future, it will trim the transfer to not read to much at a time 255 * because the mustek cannot disconnect. It will be calculated by the 256 * resolution, the velocity and the number of bytes per line. 257 */ 258 void 259 mustek_minphys(ss, bp) 260 struct ss_softc *ss; 261 struct buf *bp; 262 { 263 #ifdef SCSIPI_DEBUG 264 struct scsipi_periph *periph = ss->sc_periph; 265 #endif 266 267 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_minphys: before: %ld\n", 268 bp->b_bcount)); 269 bp->b_bcount -= bp->b_bcount % 270 ((ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8); 271 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_minphys: after: %ld\n", 272 bp->b_bcount)); 273 } 274 275 /* 276 * trigger the scanner to start a scan operation 277 * this includes sending the mode- and window-data, starting the scanner 278 * and getting the image size info 279 */ 280 int 281 mustek_trigger_scanner(ss) 282 struct ss_softc *ss; 283 { 284 struct mustek_mode_select_cmd mode_cmd; 285 struct mustek_mode_select_data mode_data; 286 struct mustek_set_window_cmd window_cmd; 287 struct mustek_set_window_data window_data; 288 struct mustek_start_scan_cmd start_scan_cmd; 289 struct scsipi_periph *periph = ss->sc_periph; 290 int pixel_tlx, pixel_tly, pixel_brx, pixel_bry, paperlength; 291 int error; 292 293 mustek_compute_sizes(ss); 294 295 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_trigger_scanner\n")); 296 297 /* 298 * set the window params and send the scsi command 299 */ 300 memset(&window_cmd, 0, sizeof(window_cmd)); 301 window_cmd.opcode = MUSTEK_SET_WINDOW; 302 window_cmd.length = sizeof(window_data); 303 304 memset(&window_data, 0, sizeof(window_data)); 305 window_data.frame.header = MUSTEK_LINEART_BACKGROUND | MUSTEK_UNIT_SPEC; 306 #ifdef MUSTEK_INCH_SPEC 307 /* the positional values are all 1 byte because 256 / 8 = 32" */ 308 pixel_tlx = ss->sio.scan_x_origin / 150; 309 pixel_tly = ss->sio.scan_y_origin / 150; 310 pixel_brx = pixel_tlx + ss->sio.scan_width / 150; 311 pixel_bry = pixel_tly + ss->sio.scan_height / 150; 312 #else 313 pixel_tlx = (ss->sio.scan_x_origin * ss->sio.scan_x_resolution) / 1200; 314 pixel_tly = (ss->sio.scan_y_origin * ss->sio.scan_y_resolution) / 1200; 315 pixel_brx = pixel_tlx + 316 (ss->sio.scan_width * ss->sio.scan_x_resolution) / 1200; 317 pixel_bry = pixel_tly + 318 (ss->sio.scan_height * ss->sio.scan_y_resolution) / 1200; 319 #endif 320 _lto2l(pixel_tlx, window_data.frame.tl_x); 321 _lto2l(pixel_tly, window_data.frame.tl_y); 322 _lto2l(pixel_brx, window_data.frame.br_x); 323 _lto2l(pixel_bry, window_data.frame.br_y); 324 325 #if MUSTEK_WINDOWS >= 1 326 window_data.window1 = window_data.frame; 327 window_data.window1.header = MUSTEK_WINDOW_MASK | MUSTEK_UNIT_SPEC; 328 #endif 329 330 /* send the set window command to the scanner */ 331 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_set_parms: set_window\n")); 332 error = scsipi_command(periph, 333 (struct scsipi_generic *) &window_cmd, 334 sizeof(window_cmd), (u_char *) &window_data, sizeof(window_data), 335 MUSTEK_RETRIES, 5000, NULL, XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK); 336 if (error) 337 return (error); 338 339 /* 340 * do what it takes to actualize the mode 341 */ 342 memset(&mode_cmd, 0, sizeof(mode_cmd)); 343 mode_cmd.opcode = MUSTEK_MODE_SELECT; 344 _lto2b(sizeof(mode_data), mode_cmd.length); 345 346 memset(&mode_data, 0, sizeof(mode_data)); 347 mode_data.mode = 348 MUSTEK_MODE_MASK | MUSTEK_HT_PATTERN_BUILTIN | MUSTEK_UNIT_SPEC; 349 if (ss->sio.scan_x_resolution <= 300) { 350 mode_data.resolution = ss->sio.scan_x_resolution / 3; 351 } else { 352 /* 353 * the resolution values is computed by modulo 100, but not 354 * for 600dpi, where the value is 100 (a bit tricky, but ...) 355 */ 356 mode_data.resolution = 357 ((ss->sio.scan_x_resolution - 1) % 100) + 1; 358 } 359 mode_data.brightness = (ss->sio.scan_brightness - 64) / 3; 360 mode_data.contrast = (ss->sio.scan_contrast - 16) / 7; 361 mode_data.grain = 0; 362 mode_data.velocity = ss->sio.scan_quality / 20 - 1; 363 #ifdef MUSTEK_INCH_SPEC 364 paperlength = 14 * 8; /* 14" */ 365 #else 366 paperlength = 14 * ss->sio.scan_y_resolution; /* 14" */ 367 #endif 368 _lto2l(paperlength, mode_data.paperlength); 369 370 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_trigger_scanner: mode_select\n")); 371 /* send the command to the scanner */ 372 error = scsipi_command(periph, 373 (struct scsipi_generic *) &mode_cmd, 374 sizeof(mode_cmd), (u_char *) &mode_data, sizeof(mode_data), 375 MUSTEK_RETRIES, 5000, NULL, XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK); 376 if (error) 377 return (error); 378 379 /* 380 * now construct and send the start command 381 */ 382 memset(&start_scan_cmd, 0, sizeof(start_scan_cmd)); 383 start_scan_cmd.opcode = MUSTEK_START_STOP; 384 start_scan_cmd.mode = MUSTEK_SCAN_START; 385 if (ss->sio.scan_x_resolution <= 300) 386 start_scan_cmd.mode |= MUSTEK_RES_STEP_1; 387 else 388 start_scan_cmd.mode |= MUSTEK_RES_STEP_10; 389 switch (ss->sio.scan_image_mode) { 390 case SIM_BINARY_MONOCHROME: 391 case SIM_DITHERED_MONOCHROME: 392 start_scan_cmd.mode |= MUSTEK_BIT_MODE | MUSTEK_GRAY_FILTER; 393 break; 394 case SIM_GRAYSCALE: 395 start_scan_cmd.mode |= MUSTEK_GRAY_MODE | MUSTEK_GRAY_FILTER; 396 break; 397 case SIM_RED: 398 start_scan_cmd.mode |= MUSTEK_GRAY_MODE | MUSTEK_RED_FILTER; 399 break; 400 case SIM_GREEN: 401 start_scan_cmd.mode |= MUSTEK_GRAY_MODE | MUSTEK_GREEN_FILTER; 402 break; 403 case SIM_BLUE: 404 start_scan_cmd.mode |= MUSTEK_GRAY_MODE | MUSTEK_BLUE_FILTER; 405 break; 406 } 407 408 /* send the command to the scanner */ 409 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_trigger_scanner: start_scan\n")); 410 error = scsipi_command(periph, 411 (struct scsipi_generic *) &start_scan_cmd, 412 sizeof(start_scan_cmd), NULL, 0, 413 MUSTEK_RETRIES, 5000, NULL, 0); 414 if (error) 415 return (error); 416 417 /* 418 * now check if scanner ready this time with update of size info 419 * we wait here so that if the user issues a read directly afterwards, 420 * the scanner will respond directly (otherwise we had to sleep with 421 * a buffer locked in memory) 422 */ 423 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_trigger_scanner: get_status\n")); 424 error = mustek_get_status(ss, 60, 1); 425 if (error) 426 return (error); 427 428 return (0); 429 } 430 431 /* 432 * stop a scan operation in progress 433 */ 434 int 435 mustek_rewind_scanner(ss) 436 struct ss_softc *ss; 437 { 438 struct mustek_start_scan_cmd cmd; 439 struct scsipi_periph *periph = ss->sc_periph; 440 int error; 441 442 if (ss->sio.scan_window_size != 0) { 443 /* 444 * only if not all data has been read, the scanner has to be 445 * stopped 446 */ 447 memset(&cmd, 0, sizeof(cmd)); 448 cmd.opcode = MUSTEK_START_STOP; 449 cmd.mode = MUSTEK_SCAN_STOP; 450 451 /* send the command to the scanner */ 452 SC_DEBUG(periph, SCSIPI_DB1, 453 ("mustek_rewind_scanner: stop_scan\n")); 454 error = scsipi_command(periph, 455 (struct scsipi_generic *) &cmd, 456 sizeof(cmd), NULL, 0, MUSTEK_RETRIES, 5000, NULL, 0); 457 if (error) 458 return (error); 459 } 460 461 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_rewind_scanner: end\n")); 462 463 return (0); 464 } 465 466 /* 467 * read the requested number of bytes/lines from the scanner 468 */ 469 int 470 mustek_read(ss, bp) 471 struct ss_softc *ss; 472 struct buf *bp; 473 { 474 struct mustek_read_cmd cmd; 475 struct scsipi_periph *periph = ss->sc_periph; 476 u_long lines_to_read; 477 int error; 478 479 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_read: start\n")); 480 481 memset(&cmd, 0, sizeof(cmd)); 482 cmd.opcode = MUSTEK_READ; 483 484 /* instead of the bytes, the mustek wants the number of lines */ 485 lines_to_read = bp->b_bcount / 486 ((ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8); 487 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_read: read %ld lines\n", 488 lines_to_read)); 489 _lto3b(lines_to_read, cmd.length); 490 491 /* 492 * go ask the adapter to do all this for us 493 */ 494 error = scsipi_command(periph, 495 (struct scsipi_generic *) &cmd, sizeof(cmd), 496 (u_char *) bp->b_data, bp->b_bcount, MUSTEK_RETRIES, 10000, bp, 497 XS_CTL_NOSLEEP | XS_CTL_ASYNC | XS_CTL_DATA_IN); 498 if (error) { 499 printf("%s: not queued, error %d\n", ss->sc_dev.dv_xname, 500 error); 501 } else { 502 ss->sio.scan_lines -= lines_to_read; 503 if (ss->sio.scan_lines < 0) 504 ss->sio.scan_lines = 0; 505 ss->sio.scan_window_size -= bp->b_bcount; 506 if (ss->sio.scan_window_size < 0) 507 ss->sio.scan_window_size = 0; 508 } 509 510 return (0); 511 } 512 513 /* 514 * check if the scanner is ready to take commands 515 * wait timeout seconds and try only every second 516 * if update, then update picture size info 517 * 518 * returns EBUSY if scanner not ready 519 */ 520 int 521 mustek_get_status(ss, timeout, update) 522 struct ss_softc *ss; 523 int timeout, update; 524 { 525 struct mustek_get_status_cmd cmd; 526 struct mustek_get_status_data data; 527 struct scsipi_periph *periph = ss->sc_periph; 528 int error, lines, bytes_per_line; 529 530 memset(&cmd, 0, sizeof(cmd)); 531 cmd.opcode = MUSTEK_GET_STATUS; 532 cmd.length = sizeof(data); 533 534 while (1) { 535 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_get_status: stat_cmd\n")); 536 error = scsipi_command(periph, 537 (struct scsipi_generic *) &cmd, sizeof(cmd), 538 (u_char *) &data, sizeof(data), MUSTEK_RETRIES, 539 5000, NULL, XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 540 if (error) 541 return (error); 542 if ((data.ready_busy == MUSTEK_READY) || 543 (timeout-- <= 0)) 544 break; 545 /* please wait a second */ 546 tsleep((caddr_t)mustek_get_status, PRIBIO + 1, "mtkrdy", hz); 547 } 548 549 if (update) { 550 bytes_per_line = _2ltol(data.bytes_per_line); 551 lines = _3ltol(data.lines); 552 if (lines != ss->sio.scan_lines) { 553 printf("mustek: lines actual(%d) != computed(%ld)\n", 554 lines, ss->sio.scan_lines); 555 return (EIO); 556 } 557 if (bytes_per_line * lines != ss->sio.scan_window_size) { 558 printf("mustek: win-size actual(%d) != computed(%ld)\n", 559 bytes_per_line * lines, ss->sio.scan_window_size); 560 return (EIO); 561 } 562 563 SC_DEBUG(periph, SCSIPI_DB1, 564 ("mustek_get_size: bpl=%ld, lines=%ld\n", 565 (ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8, 566 ss->sio.scan_lines)); 567 SC_DEBUG(periph, SCSIPI_DB1, ("window size = %ld\n", 568 ss->sio.scan_window_size)); 569 } 570 571 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_get_status: end\n")); 572 if (data.ready_busy == MUSTEK_READY) 573 return (0); 574 else 575 return (EBUSY); 576 } 577 578 /* 579 * mustek_compute_sizes: compute window_size and lines for the picture 580 * this function is called from different places in the code 581 */ 582 void 583 mustek_compute_sizes(ss) 584 struct ss_softc *ss; 585 { 586 587 switch (ss->sio.scan_image_mode) { 588 case SIM_BINARY_MONOCHROME: 589 case SIM_DITHERED_MONOCHROME: 590 ss->sio.scan_bits_per_pixel = 1; 591 break; 592 case SIM_GRAYSCALE: 593 case SIM_RED: 594 case SIM_GREEN: 595 case SIM_BLUE: 596 ss->sio.scan_bits_per_pixel = 8; 597 break; 598 } 599 600 /* 601 * horizontal number of bytes is always a multiple of 2, 602 * in 8-bit mode at least 603 */ 604 ss->sio.scan_pixels_per_line = 605 (ss->sio.scan_width * ss->sio.scan_x_resolution) / 1200; 606 if (ss->sio.scan_bits_per_pixel == 1) 607 /* make it a multiple of 16, and thus of 2 bytes */ 608 ss->sio.scan_pixels_per_line = 609 (ss->sio.scan_pixels_per_line + 15) & 0xfffffff0; 610 else 611 ss->sio.scan_pixels_per_line = 612 (ss->sio.scan_pixels_per_line + 1) & 0xfffffffe; 613 614 ss->sio.scan_lines = 615 (ss->sio.scan_height * ss->sio.scan_y_resolution) / 1200; 616 ss->sio.scan_window_size = ss->sio.scan_lines * 617 ((ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8); 618 } 619
Indexes created Tue Sep 23 07:09:52 GMT 2025