1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * das6402.c 4 * Comedi driver for DAS6402 compatible boards 5 * Copyright(c) 2014 H Hartley Sweeten <hsweeten@visionengravers.com> 6 * 7 * Rewrite of an experimental driver by: 8 * Copyright (C) 1999 Oystein Svendsen <svendsen@pvv.org> 9 */ 10 11 /* 12 * Driver: das6402 13 * Description: Keithley Metrabyte DAS6402 (& compatibles) 14 * Devices: [Keithley Metrabyte] DAS6402-12 (das6402-12), 15 * DAS6402-16 (das6402-16) 16 * Author: H Hartley Sweeten <hsweeten@visionengravers.com> 17 * Updated: Fri, 14 Mar 2014 10:18:43 -0700 18 * Status: unknown 19 * 20 * Configuration Options: 21 * [0] - I/O base address 22 * [1] - IRQ (optional, needed for async command support) 23 */ 24 25 #include <linux/module.h> 26 #include <linux/interrupt.h> 27 #include <linux/comedi/comedidev.h> 28 #include <linux/comedi/comedi_8254.h> 29 30 /* 31 * Register I/O map 32 */ 33 #define DAS6402_AI_DATA_REG 0x00 34 #define DAS6402_AI_MUX_REG 0x02 35 #define DAS6402_AI_MUX_LO(x) (((x) & 0x3f) << 0) 36 #define DAS6402_AI_MUX_HI(x) (((x) & 0x3f) << 8) 37 #define DAS6402_DI_DO_REG 0x03 38 #define DAS6402_AO_DATA_REG(x) (0x04 + ((x) * 2)) 39 #define DAS6402_AO_LSB_REG(x) (0x04 + ((x) * 2)) 40 #define DAS6402_AO_MSB_REG(x) (0x05 + ((x) * 2)) 41 #define DAS6402_STATUS_REG 0x08 42 #define DAS6402_STATUS_FFNE BIT(0) 43 #define DAS6402_STATUS_FHALF BIT(1) 44 #define DAS6402_STATUS_FFULL BIT(2) 45 #define DAS6402_STATUS_XINT BIT(3) 46 #define DAS6402_STATUS_INT BIT(4) 47 #define DAS6402_STATUS_XTRIG BIT(5) 48 #define DAS6402_STATUS_INDGT BIT(6) 49 #define DAS6402_STATUS_10MHZ BIT(7) 50 #define DAS6402_STATUS_W_CLRINT BIT(0) 51 #define DAS6402_STATUS_W_CLRXTR BIT(1) 52 #define DAS6402_STATUS_W_CLRXIN BIT(2) 53 #define DAS6402_STATUS_W_EXTEND BIT(4) 54 #define DAS6402_STATUS_W_ARMED BIT(5) 55 #define DAS6402_STATUS_W_POSTMODE BIT(6) 56 #define DAS6402_STATUS_W_10MHZ BIT(7) 57 #define DAS6402_CTRL_REG 0x09 58 #define DAS6402_CTRL_TRIG(x) ((x) << 0) 59 #define DAS6402_CTRL_SOFT_TRIG DAS6402_CTRL_TRIG(0) 60 #define DAS6402_CTRL_EXT_FALL_TRIG DAS6402_CTRL_TRIG(1) 61 #define DAS6402_CTRL_EXT_RISE_TRIG DAS6402_CTRL_TRIG(2) 62 #define DAS6402_CTRL_PACER_TRIG DAS6402_CTRL_TRIG(3) 63 #define DAS6402_CTRL_BURSTEN BIT(2) 64 #define DAS6402_CTRL_XINTE BIT(3) 65 #define DAS6402_CTRL_IRQ(x) ((x) << 4) 66 #define DAS6402_CTRL_INTE BIT(7) 67 #define DAS6402_TRIG_REG 0x0a 68 #define DAS6402_TRIG_TGEN BIT(0) 69 #define DAS6402_TRIG_TGSEL BIT(1) 70 #define DAS6402_TRIG_TGPOL BIT(2) 71 #define DAS6402_TRIG_PRETRIG BIT(3) 72 #define DAS6402_AO_RANGE(_chan, _range) ((_range) << ((_chan) ? 6 : 4)) 73 #define DAS6402_AO_RANGE_MASK(_chan) (3 << ((_chan) ? 6 : 4)) 74 #define DAS6402_MODE_REG 0x0b 75 #define DAS6402_MODE_RANGE(x) ((x) << 2) 76 #define DAS6402_MODE_POLLED DAS6402_MODE_RANGE(0) 77 #define DAS6402_MODE_FIFONEPTY DAS6402_MODE_RANGE(1) 78 #define DAS6402_MODE_FIFOHFULL DAS6402_MODE_RANGE(2) 79 #define DAS6402_MODE_EOB DAS6402_MODE_RANGE(3) 80 #define DAS6402_MODE_ENHANCED BIT(4) 81 #define DAS6402_MODE_SE BIT(5) 82 #define DAS6402_MODE_UNI BIT(6) 83 #define DAS6402_MODE_DMA(x) ((x) << 7) 84 #define DAS6402_MODE_DMA1 DAS6402_MODE_DMA(0) 85 #define DAS6402_MODE_DMA3 DAS6402_MODE_DMA(1) 86 #define DAS6402_TIMER_BASE 0x0c 87 88 static const struct comedi_lrange das6402_ai_ranges = { 89 8, { 90 BIP_RANGE(10), 91 BIP_RANGE(5), 92 BIP_RANGE(2.5), 93 BIP_RANGE(1.25), 94 UNI_RANGE(10), 95 UNI_RANGE(5), 96 UNI_RANGE(2.5), 97 UNI_RANGE(1.25) 98 } 99 }; 100 101 /* 102 * Analog output ranges are programmable on the DAS6402/12. 103 * For the DAS6402/16 the range bits have no function, the 104 * DAC ranges are selected by switches on the board. 105 */ 106 static const struct comedi_lrange das6402_ao_ranges = { 107 4, { 108 BIP_RANGE(5), 109 BIP_RANGE(10), 110 UNI_RANGE(5), 111 UNI_RANGE(10) 112 } 113 }; 114 115 struct das6402_boardinfo { 116 const char *name; 117 unsigned int maxdata; 118 }; 119 120 static struct das6402_boardinfo das6402_boards[] = { 121 { 122 .name = "das6402-12", 123 .maxdata = 0x0fff, 124 }, { 125 .name = "das6402-16", 126 .maxdata = 0xffff, 127 }, 128 }; 129 130 struct das6402_private { 131 unsigned int irq; 132 unsigned int ao_range; 133 }; 134 135 static void das6402_set_mode(struct comedi_device *dev, 136 unsigned int mode) 137 { 138 outb(DAS6402_MODE_ENHANCED | mode, dev->iobase + DAS6402_MODE_REG); 139 } 140 141 static void das6402_set_extended(struct comedi_device *dev, 142 unsigned int val) 143 { 144 outb(DAS6402_STATUS_W_EXTEND, dev->iobase + DAS6402_STATUS_REG); 145 outb(DAS6402_STATUS_W_EXTEND | val, dev->iobase + DAS6402_STATUS_REG); 146 outb(val, dev->iobase + DAS6402_STATUS_REG); 147 } 148 149 static void das6402_clear_all_interrupts(struct comedi_device *dev) 150 { 151 outb(DAS6402_STATUS_W_CLRINT | 152 DAS6402_STATUS_W_CLRXTR | 153 DAS6402_STATUS_W_CLRXIN, dev->iobase + DAS6402_STATUS_REG); 154 } 155 156 static void das6402_ai_clear_eoc(struct comedi_device *dev) 157 { 158 outb(DAS6402_STATUS_W_CLRINT, dev->iobase + DAS6402_STATUS_REG); 159 } 160 161 static unsigned int das6402_ai_read_sample(struct comedi_device *dev, 162 struct comedi_subdevice *s) 163 { 164 unsigned int val; 165 166 val = inw(dev->iobase + DAS6402_AI_DATA_REG); 167 if (s->maxdata == 0x0fff) 168 val >>= 4; 169 return val; 170 } 171 172 static irqreturn_t das6402_interrupt(int irq, void *d) 173 { 174 struct comedi_device *dev = d; 175 struct comedi_subdevice *s = dev->read_subdev; 176 struct comedi_async *async = s->async; 177 struct comedi_cmd *cmd = &async->cmd; 178 unsigned int status; 179 180 status = inb(dev->iobase + DAS6402_STATUS_REG); 181 if ((status & DAS6402_STATUS_INT) == 0) 182 return IRQ_NONE; 183 184 if (status & DAS6402_STATUS_FFULL) { 185 async->events |= COMEDI_CB_OVERFLOW; 186 } else if (status & DAS6402_STATUS_FFNE) { 187 unsigned short val; 188 189 val = das6402_ai_read_sample(dev, s); 190 comedi_buf_write_samples(s, &val, 1); 191 192 if (cmd->stop_src == TRIG_COUNT && 193 async->scans_done >= cmd->stop_arg) 194 async->events |= COMEDI_CB_EOA; 195 } 196 197 das6402_clear_all_interrupts(dev); 198 199 comedi_handle_events(dev, s); 200 201 return IRQ_HANDLED; 202 } 203 204 static void das6402_ai_set_mode(struct comedi_device *dev, 205 struct comedi_subdevice *s, 206 unsigned int chanspec, 207 unsigned int mode) 208 { 209 unsigned int range = CR_RANGE(chanspec); 210 unsigned int aref = CR_AREF(chanspec); 211 212 mode |= DAS6402_MODE_RANGE(range); 213 if (aref == AREF_GROUND) 214 mode |= DAS6402_MODE_SE; 215 if (comedi_range_is_unipolar(s, range)) 216 mode |= DAS6402_MODE_UNI; 217 218 das6402_set_mode(dev, mode); 219 } 220 221 static int das6402_ai_cmd(struct comedi_device *dev, 222 struct comedi_subdevice *s) 223 { 224 struct das6402_private *devpriv = dev->private; 225 struct comedi_cmd *cmd = &s->async->cmd; 226 unsigned int chan_lo = CR_CHAN(cmd->chanlist[0]); 227 unsigned int chan_hi = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]); 228 229 das6402_ai_set_mode(dev, s, cmd->chanlist[0], DAS6402_MODE_FIFONEPTY); 230 231 /* load the mux for chanlist conversion */ 232 outw(DAS6402_AI_MUX_HI(chan_hi) | DAS6402_AI_MUX_LO(chan_lo), 233 dev->iobase + DAS6402_AI_MUX_REG); 234 235 comedi_8254_update_divisors(dev->pacer); 236 comedi_8254_pacer_enable(dev->pacer, 1, 2, true); 237 238 /* enable interrupt and pacer trigger */ 239 outb(DAS6402_CTRL_INTE | 240 DAS6402_CTRL_IRQ(devpriv->irq) | 241 DAS6402_CTRL_PACER_TRIG, dev->iobase + DAS6402_CTRL_REG); 242 243 return 0; 244 } 245 246 static int das6402_ai_check_chanlist(struct comedi_device *dev, 247 struct comedi_subdevice *s, 248 struct comedi_cmd *cmd) 249 { 250 unsigned int chan0 = CR_CHAN(cmd->chanlist[0]); 251 unsigned int range0 = CR_RANGE(cmd->chanlist[0]); 252 unsigned int aref0 = CR_AREF(cmd->chanlist[0]); 253 int i; 254 255 for (i = 1; i < cmd->chanlist_len; i++) { 256 unsigned int chan = CR_CHAN(cmd->chanlist[i]); 257 unsigned int range = CR_RANGE(cmd->chanlist[i]); 258 unsigned int aref = CR_AREF(cmd->chanlist[i]); 259 260 if (chan != chan0 + i) { 261 dev_dbg(dev->class_dev, 262 "chanlist must be consecutive\n"); 263 return -EINVAL; 264 } 265 266 if (range != range0) { 267 dev_dbg(dev->class_dev, 268 "chanlist must have the same range\n"); 269 return -EINVAL; 270 } 271 272 if (aref != aref0) { 273 dev_dbg(dev->class_dev, 274 "chanlist must have the same reference\n"); 275 return -EINVAL; 276 } 277 278 if (aref0 == AREF_DIFF && chan > (s->n_chan / 2)) { 279 dev_dbg(dev->class_dev, 280 "chanlist differential channel too large\n"); 281 return -EINVAL; 282 } 283 } 284 return 0; 285 } 286 287 static int das6402_ai_cmdtest(struct comedi_device *dev, 288 struct comedi_subdevice *s, 289 struct comedi_cmd *cmd) 290 { 291 int err = 0; 292 unsigned int arg; 293 294 /* Step 1 : check if triggers are trivially valid */ 295 296 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW); 297 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW); 298 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_TIMER); 299 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); 300 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE); 301 302 if (err) 303 return 1; 304 305 /* Step 2a : make sure trigger sources are unique */ 306 307 err |= comedi_check_trigger_is_unique(cmd->stop_src); 308 309 /* Step 2b : and mutually compatible */ 310 311 if (err) 312 return 2; 313 314 /* Step 3: check if arguments are trivially valid */ 315 316 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); 317 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); 318 err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 10000); 319 err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1); 320 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, 321 cmd->chanlist_len); 322 323 if (cmd->stop_src == TRIG_COUNT) 324 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1); 325 else /* TRIG_NONE */ 326 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); 327 328 if (err) 329 return 3; 330 331 /* step 4: fix up any arguments */ 332 333 arg = cmd->convert_arg; 334 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags); 335 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg); 336 337 if (err) 338 return 4; 339 340 /* Step 5: check channel list if it exists */ 341 if (cmd->chanlist && cmd->chanlist_len > 0) 342 err |= das6402_ai_check_chanlist(dev, s, cmd); 343 344 if (err) 345 return 5; 346 347 return 0; 348 } 349 350 static int das6402_ai_cancel(struct comedi_device *dev, 351 struct comedi_subdevice *s) 352 { 353 outb(DAS6402_CTRL_SOFT_TRIG, dev->iobase + DAS6402_CTRL_REG); 354 355 return 0; 356 } 357 358 static void das6402_ai_soft_trig(struct comedi_device *dev) 359 { 360 outw(0, dev->iobase + DAS6402_AI_DATA_REG); 361 } 362 363 static int das6402_ai_eoc(struct comedi_device *dev, 364 struct comedi_subdevice *s, 365 struct comedi_insn *insn, 366 unsigned long context) 367 { 368 unsigned int status; 369 370 status = inb(dev->iobase + DAS6402_STATUS_REG); 371 if (status & DAS6402_STATUS_FFNE) 372 return 0; 373 return -EBUSY; 374 } 375 376 static int das6402_ai_insn_read(struct comedi_device *dev, 377 struct comedi_subdevice *s, 378 struct comedi_insn *insn, 379 unsigned int *data) 380 { 381 unsigned int chan = CR_CHAN(insn->chanspec); 382 unsigned int aref = CR_AREF(insn->chanspec); 383 int ret; 384 int i; 385 386 if (aref == AREF_DIFF && chan > (s->n_chan / 2)) 387 return -EINVAL; 388 389 /* enable software conversion trigger */ 390 outb(DAS6402_CTRL_SOFT_TRIG, dev->iobase + DAS6402_CTRL_REG); 391 392 das6402_ai_set_mode(dev, s, insn->chanspec, DAS6402_MODE_POLLED); 393 394 /* load the mux for single channel conversion */ 395 outw(DAS6402_AI_MUX_HI(chan) | DAS6402_AI_MUX_LO(chan), 396 dev->iobase + DAS6402_AI_MUX_REG); 397 398 for (i = 0; i < insn->n; i++) { 399 das6402_ai_clear_eoc(dev); 400 das6402_ai_soft_trig(dev); 401 402 ret = comedi_timeout(dev, s, insn, das6402_ai_eoc, 0); 403 if (ret) 404 break; 405 406 data[i] = das6402_ai_read_sample(dev, s); 407 } 408 409 das6402_ai_clear_eoc(dev); 410 411 return insn->n; 412 } 413 414 static int das6402_ao_insn_write(struct comedi_device *dev, 415 struct comedi_subdevice *s, 416 struct comedi_insn *insn, 417 unsigned int *data) 418 { 419 struct das6402_private *devpriv = dev->private; 420 unsigned int chan = CR_CHAN(insn->chanspec); 421 unsigned int range = CR_RANGE(insn->chanspec); 422 unsigned int val; 423 int i; 424 425 /* set the range for this channel */ 426 val = devpriv->ao_range; 427 val &= ~DAS6402_AO_RANGE_MASK(chan); 428 val |= DAS6402_AO_RANGE(chan, range); 429 if (val != devpriv->ao_range) { 430 devpriv->ao_range = val; 431 outb(val, dev->iobase + DAS6402_TRIG_REG); 432 } 433 434 /* 435 * The DAS6402/16 has a jumper to select either individual 436 * update (UPDATE) or simultaneous updating (XFER) of both 437 * DAC's. In UPDATE mode, when the MSB is written, that DAC 438 * is updated. In XFER mode, after both DAC's are loaded, 439 * a read cycle of any DAC register will update both DAC's 440 * simultaneously. 441 * 442 * If you have XFER mode enabled a (*insn_read) will need 443 * to be performed in order to update the DAC's with the 444 * last value written. 445 */ 446 for (i = 0; i < insn->n; i++) { 447 val = data[i]; 448 449 s->readback[chan] = val; 450 451 if (s->maxdata == 0x0fff) { 452 /* 453 * DAS6402/12 has the two 8-bit DAC registers, left 454 * justified (the 4 LSB bits are don't care). Data 455 * can be written as one word. 456 */ 457 val <<= 4; 458 outw(val, dev->iobase + DAS6402_AO_DATA_REG(chan)); 459 } else { 460 /* 461 * DAS6402/16 uses both 8-bit DAC registers and needs 462 * to be written LSB then MSB. 463 */ 464 outb(val & 0xff, 465 dev->iobase + DAS6402_AO_LSB_REG(chan)); 466 outb((val >> 8) & 0xff, 467 dev->iobase + DAS6402_AO_LSB_REG(chan)); 468 } 469 } 470 471 return insn->n; 472 } 473 474 static int das6402_ao_insn_read(struct comedi_device *dev, 475 struct comedi_subdevice *s, 476 struct comedi_insn *insn, 477 unsigned int *data) 478 { 479 unsigned int chan = CR_CHAN(insn->chanspec); 480 481 /* 482 * If XFER mode is enabled, reading any DAC register 483 * will update both DAC's simultaneously. 484 */ 485 inw(dev->iobase + DAS6402_AO_LSB_REG(chan)); 486 487 return comedi_readback_insn_read(dev, s, insn, data); 488 } 489 490 static int das6402_di_insn_bits(struct comedi_device *dev, 491 struct comedi_subdevice *s, 492 struct comedi_insn *insn, 493 unsigned int *data) 494 { 495 data[1] = inb(dev->iobase + DAS6402_DI_DO_REG); 496 497 return insn->n; 498 } 499 500 static int das6402_do_insn_bits(struct comedi_device *dev, 501 struct comedi_subdevice *s, 502 struct comedi_insn *insn, 503 unsigned int *data) 504 { 505 if (comedi_dio_update_state(s, data)) 506 outb(s->state, dev->iobase + DAS6402_DI_DO_REG); 507 508 data[1] = s->state; 509 510 return insn->n; 511 } 512 513 static void das6402_reset(struct comedi_device *dev) 514 { 515 struct das6402_private *devpriv = dev->private; 516 517 /* enable "Enhanced" mode */ 518 outb(DAS6402_MODE_ENHANCED, dev->iobase + DAS6402_MODE_REG); 519 520 /* enable 10MHz pacer clock */ 521 das6402_set_extended(dev, DAS6402_STATUS_W_10MHZ); 522 523 /* enable software conversion trigger */ 524 outb(DAS6402_CTRL_SOFT_TRIG, dev->iobase + DAS6402_CTRL_REG); 525 526 /* default ADC to single-ended unipolar 10V inputs */ 527 das6402_set_mode(dev, DAS6402_MODE_RANGE(0) | 528 DAS6402_MODE_POLLED | 529 DAS6402_MODE_SE | 530 DAS6402_MODE_UNI); 531 532 /* default mux for single channel conversion (channel 0) */ 533 outw(DAS6402_AI_MUX_HI(0) | DAS6402_AI_MUX_LO(0), 534 dev->iobase + DAS6402_AI_MUX_REG); 535 536 /* set both DAC's for unipolar 5V output range */ 537 devpriv->ao_range = DAS6402_AO_RANGE(0, 2) | DAS6402_AO_RANGE(1, 2); 538 outb(devpriv->ao_range, dev->iobase + DAS6402_TRIG_REG); 539 540 /* set both DAC's to 0V */ 541 outw(0, dev->iobase + DAS6402_AO_DATA_REG(0)); 542 outw(0, dev->iobase + DAS6402_AO_DATA_REG(0)); 543 inw(dev->iobase + DAS6402_AO_LSB_REG(0)); 544 545 /* set all digital outputs low */ 546 outb(0, dev->iobase + DAS6402_DI_DO_REG); 547 548 das6402_clear_all_interrupts(dev); 549 } 550 551 static int das6402_attach(struct comedi_device *dev, 552 struct comedi_devconfig *it) 553 { 554 const struct das6402_boardinfo *board = dev->board_ptr; 555 struct das6402_private *devpriv; 556 struct comedi_subdevice *s; 557 int ret; 558 559 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); 560 if (!devpriv) 561 return -ENOMEM; 562 563 ret = comedi_request_region(dev, it->options[0], 0x10); 564 if (ret) 565 return ret; 566 567 das6402_reset(dev); 568 569 /* IRQs 2,3,5,6,7, 10,11,15 are valid for "enhanced" mode */ 570 if ((1 << it->options[1]) & 0x8cec) { 571 ret = request_irq(it->options[1], das6402_interrupt, 0, 572 dev->board_name, dev); 573 if (ret == 0) { 574 dev->irq = it->options[1]; 575 576 switch (dev->irq) { 577 case 10: 578 devpriv->irq = 4; 579 break; 580 case 11: 581 devpriv->irq = 1; 582 break; 583 case 15: 584 devpriv->irq = 6; 585 break; 586 default: 587 devpriv->irq = dev->irq; 588 break; 589 } 590 } 591 } 592 593 dev->pacer = comedi_8254_io_alloc(dev->iobase + DAS6402_TIMER_BASE, 594 I8254_OSC_BASE_10MHZ, I8254_IO8, 0); 595 if (IS_ERR(dev->pacer)) 596 return PTR_ERR(dev->pacer); 597 598 ret = comedi_alloc_subdevices(dev, 4); 599 if (ret) 600 return ret; 601 602 /* Analog Input subdevice */ 603 s = &dev->subdevices[0]; 604 s->type = COMEDI_SUBD_AI; 605 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; 606 s->n_chan = 64; 607 s->maxdata = board->maxdata; 608 s->range_table = &das6402_ai_ranges; 609 s->insn_read = das6402_ai_insn_read; 610 if (dev->irq) { 611 dev->read_subdev = s; 612 s->subdev_flags |= SDF_CMD_READ; 613 s->len_chanlist = s->n_chan; 614 s->do_cmdtest = das6402_ai_cmdtest; 615 s->do_cmd = das6402_ai_cmd; 616 s->cancel = das6402_ai_cancel; 617 } 618 619 /* Analog Output subdevice */ 620 s = &dev->subdevices[1]; 621 s->type = COMEDI_SUBD_AO; 622 s->subdev_flags = SDF_WRITABLE; 623 s->n_chan = 2; 624 s->maxdata = board->maxdata; 625 s->range_table = &das6402_ao_ranges; 626 s->insn_write = das6402_ao_insn_write; 627 s->insn_read = das6402_ao_insn_read; 628 629 ret = comedi_alloc_subdev_readback(s); 630 if (ret) 631 return ret; 632 633 /* Digital Input subdevice */ 634 s = &dev->subdevices[2]; 635 s->type = COMEDI_SUBD_DI; 636 s->subdev_flags = SDF_READABLE; 637 s->n_chan = 8; 638 s->maxdata = 1; 639 s->range_table = &range_digital; 640 s->insn_bits = das6402_di_insn_bits; 641 642 /* Digital Input subdevice */ 643 s = &dev->subdevices[3]; 644 s->type = COMEDI_SUBD_DO; 645 s->subdev_flags = SDF_WRITABLE; 646 s->n_chan = 8; 647 s->maxdata = 1; 648 s->range_table = &range_digital; 649 s->insn_bits = das6402_do_insn_bits; 650 651 return 0; 652 } 653 654 static struct comedi_driver das6402_driver = { 655 .driver_name = "das6402", 656 .module = THIS_MODULE, 657 .attach = das6402_attach, 658 .detach = comedi_legacy_detach, 659 .board_name = &das6402_boards[0].name, 660 .num_names = ARRAY_SIZE(das6402_boards), 661 .offset = sizeof(struct das6402_boardinfo), 662 }; 663 module_comedi_driver(das6402_driver) 664 665 MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>"); 666 MODULE_DESCRIPTION("Comedi driver for DAS6402 compatible boards"); 667 MODULE_LICENSE("GPL"); 668