ss_mustek.c revision 1.33
1 /* $NetBSD: ss_mustek.c,v 1.33 2006/09/03 06:22:05 christos 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 1.33 2006/09/03 06:22:05 christos Exp $"); 50 51 #include <sys/param.h> 52 #include <sys/kernel.h> 53 #include <sys/systm.h> 54 #include <sys/fcntl.h> 55 #include <sys/errno.h> 56 #include <sys/ioctl.h> 57 #include <sys/malloc.h> 58 #include <sys/buf.h> 59 #include <sys/bufq.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/scsipi_all.h> 67 #include <dev/scsipi/scsi_all.h> 68 #include <dev/scsipi/scsi_scanner.h> 69 #include <dev/scsipi/scsipiconf.h> 70 #include <dev/scsipi/scsipi_base.h> 71 #include <dev/scsipi/ssvar.h> 72 #include <dev/scsipi/ss_mustek.h> 73 74 #define MUSTEK_RETRIES 4 75 76 static int mustek_get_params(struct ss_softc *); 77 static int mustek_set_params(struct ss_softc *, struct scan_io *); 78 static int mustek_trigger_scanner(struct ss_softc *); 79 static void mustek_minphys(struct ss_softc *, struct buf *); 80 static int mustek_read(struct ss_softc *, struct buf *); 81 static int mustek_rewind_scanner(struct ss_softc *); 82 83 /* only used internally */ 84 static int mustek_get_status(struct ss_softc *, int, int); 85 static void mustek_compute_sizes(struct ss_softc *); 86 87 /* 88 * structure for the special handlers 89 */ 90 static struct ss_special mustek_special = { 91 mustek_set_params, 92 mustek_trigger_scanner, 93 mustek_get_params, 94 mustek_minphys, 95 mustek_read, 96 mustek_rewind_scanner, 97 NULL, /* no adf support right now */ 98 NULL /* no adf support right now */ 99 }; 100 101 /* 102 * mustek_attach: attach special functions to ss 103 */ 104 void 105 mustek_attach(struct ss_softc *ss, struct scsipibus_attach_args *sa) 106 { 107 #ifdef SCSIPI_DEBUG 108 struct scsipi_periph *periph = sa->sa_periph; 109 #endif 110 111 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_attach: start\n")); 112 ss->sio.scan_scanner_type = 0; 113 114 printf("\n%s: ", ss->sc_dev.dv_xname); 115 116 /* first, check the model which determines resolutions */ 117 if (!memcmp(sa->sa_inqbuf.product, "MFS-06000CX", 11)) { 118 ss->sio.scan_scanner_type = MUSTEK_06000CX; 119 printf("Mustek 6000CX Flatbed 3-pass color scanner, 3 - 600 dpi\n"); 120 } 121 if (!memcmp(sa->sa_inqbuf.product, "MFS-12000CX", 11)) { 122 ss->sio.scan_scanner_type = MUSTEK_12000CX; 123 printf("Mustek 12000CX Flatbed 3-pass color scanner, 6 - 1200 dpi\n"); 124 } 125 126 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_attach: scanner_type = %d\n", 127 ss->sio.scan_scanner_type)); 128 129 /* install special handlers */ 130 ss->special = &mustek_special; 131 132 /* 133 * populate the scanio struct with legal values 134 * the default should come from user space 135 */ 136 ss->sio.scan_width = 1200; 137 ss->sio.scan_height = 1200; 138 ss->sio.scan_x_resolution = 99; 139 ss->sio.scan_y_resolution = 99; 140 ss->sio.scan_x_origin = 0; 141 ss->sio.scan_y_origin = 0; 142 ss->sio.scan_brightness = 100; 143 ss->sio.scan_contrast = 100; 144 ss->sio.scan_quality = 100; 145 ss->sio.scan_image_mode = SIM_GRAYSCALE; 146 147 mustek_compute_sizes(ss); 148 } 149 150 static int 151 mustek_get_params (struct ss_softc *ss) 152 { 153 154 return (0); 155 } 156 157 /* 158 * check the parameters if the mustek is capable of fulfilling it 159 * but don't send the command to the scanner in case the user wants 160 * to change parameters by more than one call 161 */ 162 static int 163 mustek_set_params(struct ss_softc *ss, struct scan_io *sio) 164 { 165 int error; 166 167 /* 168 * if the scanner is triggered, then rewind it 169 */ 170 if (ss->flags & SSF_TRIGGERED) { 171 error = mustek_rewind_scanner(ss); 172 if (error) 173 return (error); 174 } 175 176 /* size constraints: 8.5" horizontally and 14" vertically */ 177 #ifdef MUSTEK_INCH_SPEC 178 /* sizes must be a multiple of 1/8" */ 179 sio->scan_x_origin -= sio->scan_x_origin % 150; 180 sio->scan_y_origin -= sio->scan_y_origin % 150; 181 sio->scan_width -= sio->scan_width % 150; 182 sio->scan_height -= sio->scan_height % 150; 183 #endif 184 if (sio->scan_width == 0 || 185 sio->scan_x_origin + sio->scan_width > 10200 || 186 sio->scan_height == 0 || 187 sio->scan_y_origin + sio->scan_height > 16800) 188 return (EINVAL); 189 190 /* 191 * for now, only realize the values for the MUSTEK_06000CX 192 * in the future, values for the MUSTEK_12000CX will be implemented 193 */ 194 195 /* 196 * resolution (dpi) must be <= 300 and a multiple of 3 or 197 * between 300 and 600 and a multiple of 30 198 */ 199 sio->scan_x_resolution -= sio->scan_x_resolution <= 300 ? 200 sio->scan_x_resolution % 3 : sio->scan_x_resolution % 30; 201 sio->scan_y_resolution -= sio->scan_y_resolution <= 300 ? 202 sio->scan_y_resolution % 3 : sio->scan_y_resolution % 30; 203 if (sio->scan_x_resolution < 3 || sio->scan_x_resolution > 600 || 204 sio->scan_x_resolution != sio->scan_y_resolution) 205 return (EINVAL); 206 207 /* assume brightness values are between 64 and 136 in steps of 3 */ 208 sio->scan_brightness -= (sio->scan_brightness - 64) % 3; 209 if (sio->scan_brightness < 64 || sio->scan_brightness > 136) 210 return (EINVAL); 211 212 /* contrast values must be between 16 and 184 in steps of 7 */ 213 sio->scan_contrast -= (sio->scan_contrast - 16) % 7; 214 if (sio->scan_contrast < 16 || sio->scan_contrast > 184) 215 return (EINVAL); 216 217 /* 218 * velocity: between 0 (fast) and 4 (slow) which will be mapped 219 * to 100% = 4, 80% = 3, 60% = 2, 40% = 1, 20% = 0 220 * must be a multiple of 20 221 */ 222 sio->scan_quality -= sio->scan_quality % 20; 223 if (sio->scan_quality < 20 || sio->scan_quality > 100) 224 return (EINVAL); 225 226 switch (sio->scan_image_mode) { 227 case SIM_BINARY_MONOCHROME: 228 case SIM_DITHERED_MONOCHROME: 229 case SIM_GRAYSCALE: 230 case SIM_RED: 231 case SIM_GREEN: 232 case SIM_BLUE: 233 break; 234 default: 235 return (EINVAL); 236 } 237 238 /* change ss_softc to the new values, but save ro-variables */ 239 sio->scan_scanner_type = ss->sio.scan_scanner_type; 240 memcpy(&ss->sio, sio, sizeof(struct scan_io)); 241 242 mustek_compute_sizes(ss); 243 244 return (0); 245 } 246 247 /* 248 * trim the requested transfer to a multiple of the line size 249 * this is called only from ssread() which guarantees, scanner is triggered 250 * In the future, it will trim the transfer to not read to much at a time 251 * because the mustek cannot disconnect. It will be calculated by the 252 * resolution, the velocity and the number of bytes per line. 253 */ 254 static void 255 mustek_minphys(struct ss_softc *ss, struct buf *bp) 256 { 257 #ifdef SCSIPI_DEBUG 258 struct scsipi_periph *periph = ss->sc_periph; 259 #endif 260 261 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_minphys: before: %d\n", 262 bp->b_bcount)); 263 bp->b_bcount -= bp->b_bcount % 264 ((ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8); 265 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_minphys: after: %d\n", 266 bp->b_bcount)); 267 } 268 269 /* 270 * trigger the scanner to start a scan operation 271 * this includes sending the mode- and window-data, starting the scanner 272 * and getting the image size info 273 */ 274 static int 275 mustek_trigger_scanner(struct ss_softc *ss) 276 { 277 struct mustek_mode_select_cmd mode_cmd; 278 struct mustek_mode_select_data mode_data; 279 struct mustek_set_window_cmd window_cmd; 280 struct mustek_set_window_data window_data; 281 struct mustek_start_scan_cmd start_scan_cmd; 282 struct scsipi_periph *periph = ss->sc_periph; 283 int pixel_tlx, pixel_tly, pixel_brx, pixel_bry, paperlength; 284 int error; 285 286 mustek_compute_sizes(ss); 287 288 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_trigger_scanner\n")); 289 290 /* 291 * set the window params and send the scsi command 292 */ 293 memset(&window_cmd, 0, sizeof(window_cmd)); 294 window_cmd.opcode = MUSTEK_SET_WINDOW; 295 window_cmd.length = sizeof(window_data); 296 297 memset(&window_data, 0, sizeof(window_data)); 298 window_data.frame.header = MUSTEK_LINEART_BACKGROUND | MUSTEK_UNIT_SPEC; 299 #ifdef MUSTEK_INCH_SPEC 300 /* the positional values are all 1 byte because 256 / 8 = 32" */ 301 pixel_tlx = ss->sio.scan_x_origin / 150; 302 pixel_tly = ss->sio.scan_y_origin / 150; 303 pixel_brx = pixel_tlx + ss->sio.scan_width / 150; 304 pixel_bry = pixel_tly + ss->sio.scan_height / 150; 305 #else 306 pixel_tlx = (ss->sio.scan_x_origin * ss->sio.scan_x_resolution) / 1200; 307 pixel_tly = (ss->sio.scan_y_origin * ss->sio.scan_y_resolution) / 1200; 308 pixel_brx = pixel_tlx + 309 (ss->sio.scan_width * ss->sio.scan_x_resolution) / 1200; 310 pixel_bry = pixel_tly + 311 (ss->sio.scan_height * ss->sio.scan_y_resolution) / 1200; 312 #endif 313 _lto2l(pixel_tlx, window_data.frame.tl_x); 314 _lto2l(pixel_tly, window_data.frame.tl_y); 315 _lto2l(pixel_brx, window_data.frame.br_x); 316 _lto2l(pixel_bry, window_data.frame.br_y); 317 318 #if MUSTEK_WINDOWS >= 1 319 window_data.window1 = window_data.frame; 320 window_data.window1.header = MUSTEK_WINDOW_MASK | MUSTEK_UNIT_SPEC; 321 #endif 322 323 /* send the set window command to the scanner */ 324 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_set_parms: set_window\n")); 325 error = scsipi_command(periph, (void *)&window_cmd, sizeof(window_cmd), 326 (void *)&window_data, sizeof(window_data), 327 MUSTEK_RETRIES, 5000, NULL, XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK); 328 if (error) 329 return (error); 330 331 /* 332 * do what it takes to actualize the mode 333 */ 334 memset(&mode_cmd, 0, sizeof(mode_cmd)); 335 mode_cmd.opcode = MUSTEK_MODE_SELECT; 336 _lto2b(sizeof(mode_data), mode_cmd.length); 337 338 memset(&mode_data, 0, sizeof(mode_data)); 339 mode_data.mode = 340 MUSTEK_MODE_MASK | MUSTEK_HT_PATTERN_BUILTIN | MUSTEK_UNIT_SPEC; 341 if (ss->sio.scan_x_resolution <= 300) { 342 mode_data.resolution = ss->sio.scan_x_resolution / 3; 343 } else { 344 /* 345 * the resolution values is computed by modulo 100, but not 346 * for 600dpi, where the value is 100 (a bit tricky, but ...) 347 */ 348 mode_data.resolution = 349 ((ss->sio.scan_x_resolution - 1) % 100) + 1; 350 } 351 mode_data.brightness = (ss->sio.scan_brightness - 64) / 3; 352 mode_data.contrast = (ss->sio.scan_contrast - 16) / 7; 353 mode_data.grain = 0; 354 mode_data.velocity = ss->sio.scan_quality / 20 - 1; 355 #ifdef MUSTEK_INCH_SPEC 356 paperlength = 14 * 8; /* 14" */ 357 #else 358 paperlength = 14 * ss->sio.scan_y_resolution; /* 14" */ 359 #endif 360 _lto2l(paperlength, mode_data.paperlength); 361 362 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_trigger_scanner: mode_select\n")); 363 /* send the command to the scanner */ 364 error = scsipi_command(periph, (void *)&mode_cmd, sizeof(mode_cmd), 365 (void *)&mode_data, sizeof(mode_data), 366 MUSTEK_RETRIES, 5000, NULL, XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK); 367 if (error) 368 return (error); 369 370 /* 371 * now construct and send the start command 372 */ 373 memset(&start_scan_cmd, 0, sizeof(start_scan_cmd)); 374 start_scan_cmd.opcode = MUSTEK_START_STOP; 375 start_scan_cmd.mode = MUSTEK_SCAN_START; 376 if (ss->sio.scan_x_resolution <= 300) 377 start_scan_cmd.mode |= MUSTEK_RES_STEP_1; 378 else 379 start_scan_cmd.mode |= MUSTEK_RES_STEP_10; 380 switch (ss->sio.scan_image_mode) { 381 case SIM_BINARY_MONOCHROME: 382 case SIM_DITHERED_MONOCHROME: 383 start_scan_cmd.mode |= MUSTEK_BIT_MODE | MUSTEK_GRAY_FILTER; 384 break; 385 case SIM_GRAYSCALE: 386 start_scan_cmd.mode |= MUSTEK_GRAY_MODE | MUSTEK_GRAY_FILTER; 387 break; 388 case SIM_RED: 389 start_scan_cmd.mode |= MUSTEK_GRAY_MODE | MUSTEK_RED_FILTER; 390 break; 391 case SIM_GREEN: 392 start_scan_cmd.mode |= MUSTEK_GRAY_MODE | MUSTEK_GREEN_FILTER; 393 break; 394 case SIM_BLUE: 395 start_scan_cmd.mode |= MUSTEK_GRAY_MODE | MUSTEK_BLUE_FILTER; 396 break; 397 } 398 399 /* send the command to the scanner */ 400 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_trigger_scanner: start_scan\n")); 401 error = scsipi_command(periph, 402 (void *)&start_scan_cmd, sizeof(start_scan_cmd), 403 NULL, 0, 404 MUSTEK_RETRIES, 5000, NULL, 0); 405 if (error) 406 return (error); 407 408 /* 409 * now check if scanner ready this time with update of size info 410 * we wait here so that if the user issues a read directly afterwards, 411 * the scanner will respond directly (otherwise we had to sleep with 412 * a buffer locked in memory) 413 */ 414 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_trigger_scanner: get_status\n")); 415 error = mustek_get_status(ss, 60, 1); 416 if (error) 417 return (error); 418 419 return (0); 420 } 421 422 /* 423 * stop a scan operation in progress 424 */ 425 static int 426 mustek_rewind_scanner(struct ss_softc *ss) 427 { 428 struct mustek_start_scan_cmd cmd; 429 struct scsipi_periph *periph = ss->sc_periph; 430 int error; 431 432 if (ss->sio.scan_window_size != 0) { 433 /* 434 * only if not all data has been read, the scanner has to be 435 * stopped 436 */ 437 memset(&cmd, 0, sizeof(cmd)); 438 cmd.opcode = MUSTEK_START_STOP; 439 cmd.mode = MUSTEK_SCAN_STOP; 440 441 /* send the command to the scanner */ 442 SC_DEBUG(periph, SCSIPI_DB1, 443 ("mustek_rewind_scanner: stop_scan\n")); 444 error = scsipi_command(periph, 445 (void *)&cmd, sizeof(cmd), 446 NULL, 0, 447 MUSTEK_RETRIES, 5000, NULL, 0); 448 if (error) 449 return (error); 450 } 451 452 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_rewind_scanner: end\n")); 453 454 return (0); 455 } 456 457 /* 458 * read the requested number of bytes/lines from the scanner 459 */ 460 static int 461 mustek_read(struct ss_softc *ss, struct buf *bp) 462 { 463 struct mustek_read_cmd cmd; 464 struct scsipi_xfer *xs; 465 struct scsipi_periph *periph = ss->sc_periph; 466 u_long lines_to_read; 467 int error; 468 469 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_read: start\n")); 470 471 memset(&cmd, 0, sizeof(cmd)); 472 cmd.opcode = MUSTEK_READ; 473 474 /* instead of the bytes, the mustek wants the number of lines */ 475 lines_to_read = bp->b_bcount / 476 ((ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8); 477 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_read: read %ld lines\n", 478 lines_to_read)); 479 _lto3b(lines_to_read, cmd.length); 480 481 /* 482 * go ask the adapter to do all this for us 483 */ 484 xs = scsipi_make_xs(periph, 485 (struct scsipi_generic *) &cmd, sizeof(cmd), 486 (u_char *) bp->b_data, bp->b_bcount, 487 MUSTEK_RETRIES, 10000, bp, 488 XS_CTL_NOSLEEP | XS_CTL_ASYNC | XS_CTL_DATA_IN); 489 if (xs == NULL) { 490 /* 491 * out of memory. Keep this buffer in the queue, and 492 * retry later. 493 */ 494 callout_reset(&ss->sc_callout, hz / 2, ssrestart, 495 periph); 496 return(0); 497 } 498 #ifdef DIAGNOSTIC 499 if (BUFQ_GET(ss->buf_queue) != bp) 500 panic("ssstart(): dequeued wrong buf"); 501 #else 502 BUFQ_GET(ss->buf_queue); 503 #endif 504 error = scsipi_execute_xs(xs); 505 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 506 KASSERT(error == 0); 507 ss->sio.scan_lines -= lines_to_read; 508 #if 0 509 if (ss->sio.scan_lines < 0) 510 ss->sio.scan_lines = 0; 511 #endif 512 ss->sio.scan_window_size -= bp->b_bcount; 513 #if 0 514 if (ss->sio.scan_window_size < 0) 515 ss->sio.scan_window_size = 0; 516 #endif 517 return (0); 518 } 519 520 /* 521 * check if the scanner is ready to take commands 522 * wait timeout seconds and try only every second 523 * if update, then update picture size info 524 * 525 * returns EBUSY if scanner not ready 526 */ 527 static int 528 mustek_get_status(struct ss_softc *ss, int timeout, int update) 529 { 530 struct mustek_get_status_cmd cmd; 531 struct mustek_get_status_data data; 532 struct scsipi_periph *periph = ss->sc_periph; 533 int error, lines, bytes_per_line; 534 535 memset(&cmd, 0, sizeof(cmd)); 536 cmd.opcode = MUSTEK_GET_STATUS; 537 cmd.length = sizeof(data); 538 539 while (1) { 540 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_get_status: stat_cmd\n")); 541 error = scsipi_command(periph, (void *)&cmd, sizeof(cmd), 542 (void *)&data, sizeof(data), 543 MUSTEK_RETRIES, 5000, NULL, XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 544 if (error) 545 return (error); 546 if ((data.ready_busy == MUSTEK_READY) || 547 (timeout-- <= 0)) 548 break; 549 /* please wait a second */ 550 tsleep((caddr_t)mustek_get_status, PRIBIO + 1, "mtkrdy", hz); 551 } 552 553 if (update) { 554 bytes_per_line = _2ltol(data.bytes_per_line); 555 lines = _3ltol(data.lines); 556 if (lines != ss->sio.scan_lines) { 557 printf("mustek: lines actual(%d) != computed(%ld)\n", 558 lines, ss->sio.scan_lines); 559 return (EIO); 560 } 561 if (bytes_per_line * lines != ss->sio.scan_window_size) { 562 printf("mustek: win-size actual(%d) != computed(%ld)\n", 563 bytes_per_line * lines, ss->sio.scan_window_size); 564 return (EIO); 565 } 566 567 SC_DEBUG(periph, SCSIPI_DB1, 568 ("mustek_get_size: bpl=%ld, lines=%ld\n", 569 (ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8, 570 ss->sio.scan_lines)); 571 SC_DEBUG(periph, SCSIPI_DB1, ("window size = %ld\n", 572 ss->sio.scan_window_size)); 573 } 574 575 SC_DEBUG(periph, SCSIPI_DB1, ("mustek_get_status: end\n")); 576 if (data.ready_busy == MUSTEK_READY) 577 return (0); 578 else 579 return (EBUSY); 580 } 581 582 /* 583 * mustek_compute_sizes: compute window_size and lines for the picture 584 * this function is called from different places in the code 585 */ 586 static void 587 mustek_compute_sizes(struct ss_softc *ss) 588 { 589 590 switch (ss->sio.scan_image_mode) { 591 case SIM_BINARY_MONOCHROME: 592 case SIM_DITHERED_MONOCHROME: 593 ss->sio.scan_bits_per_pixel = 1; 594 break; 595 case SIM_GRAYSCALE: 596 case SIM_RED: 597 case SIM_GREEN: 598 case SIM_BLUE: 599 ss->sio.scan_bits_per_pixel = 8; 600 break; 601 } 602 603 /* 604 * horizontal number of bytes is always a multiple of 2, 605 * in 8-bit mode at least 606 */ 607 ss->sio.scan_pixels_per_line = 608 (ss->sio.scan_width * ss->sio.scan_x_resolution) / 1200; 609 if (ss->sio.scan_bits_per_pixel == 1) 610 /* make it a multiple of 16, and thus of 2 bytes */ 611 ss->sio.scan_pixels_per_line = 612 (ss->sio.scan_pixels_per_line + 15) & 0xfffffff0; 613 else 614 ss->sio.scan_pixels_per_line = 615 (ss->sio.scan_pixels_per_line + 1) & 0xfffffffe; 616 617 ss->sio.scan_lines = 618 (ss->sio.scan_height * ss->sio.scan_y_resolution) / 1200; 619 ss->sio.scan_window_size = ss->sio.scan_lines * 620 ((ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8); 621 } 622
Indexes created Tue Sep 23 21:09:50 GMT 2025