ii_pci20kc.c revision dc1fe479413996629df9ab10b9f4749ba60ae637
1/* 2 * comedi/drivers/ii_pci20kc.c 3 * Driver for Intelligent Instruments PCI-20001C carrier board 4 * and modules. 5 * 6 * Copyright (C) 2000 Markus Kempf <kempf@matsci.uni-sb.de> 7 * with suggestions from David Schleef 8 * 16.06.2000 9 * 10 * Linux device driver for COMEDI 11 * Intelligent Instrumentation 12 * PCI-20001 C-2A Carrier Board 13 * PCI-20341 M-1A 16-Bit analog input module 14 * - differential 15 * - range (-5V - +5V) 16 * - 16 bit 17 * PCI-20006 M-2 16-Bit analog output module 18 * - ranges (-10V - +10V) (0V - +10V) (-5V - +5V) 19 * - 16 bit 20 * 21 * only ONE PCI-20341 module possible 22 * only ONE PCI-20006 module possible 23 * no extern trigger implemented 24 * 25 * NOT WORKING (but soon) only 4 on-board differential channels supported 26 * NOT WORKING (but soon) only ONE di-port and ONE do-port supported 27 * instead of 4 digital ports 28 * di-port == Port 0 29 * do-port == Port 1 30 * 31 * The state of this driver is only a starting point for a complete 32 * COMEDI-driver. The final driver should support all features of the 33 * carrier board and modules. 34 * 35 * The test configuration: 36 * 37 * kernel 2.2.14 with RTAI v1.2 and patch-2.2.14rthal2 38 * COMEDI 0.7.45 39 * COMEDILIB 0.7.9 40 * 41 */ 42/* 43Driver: ii_pci20kc 44Description: Intelligent Instruments PCI-20001C carrier board 45Author: Markus Kempf <kempf@matsci.uni-sb.de> 46Devices: [Intelligent Instrumentation] PCI-20001C (ii_pci20kc) 47Status: works 48 49Supports the PCI-20001 C-2a Carrier board, and could probably support 50the other carrier boards with small modifications. Modules supported 51are: 52 PCI-20006 M-2 16-bit analog output module 53 PCI-20341 M-1A 16-bit analog input module 54 55Options: 56 0 Board base address 57 1 IRQ 58 2 first option for module 1 59 3 second option for module 1 60 4 first option for module 2 61 5 second option for module 2 62 6 first option for module 3 63 7 second option for module 3 64 65options for PCI-20006M: 66 first: Analog output channel 0 range configuration 67 0 bipolar 10 (-10V -- +10V) 68 1 unipolar 10 (0V -- +10V) 69 2 bipolar 5 (-5V -- 5V) 70 second: Analog output channel 1 range configuration 71 72options for PCI-20341M: 73 first: Analog input gain configuration 74 0 1 75 1 10 76 2 100 77 3 200 78*/ 79 80/* XXX needs to use ioremap() for compatibility with 2.4 kernels. Should also 81 * check_mem_region() etc. - fmhess */ 82 83#include "../comedidev.h" 84 85#define PCI20000_ID 0x1d 86#define PCI20341_ID 0x77 87#define PCI20006_ID 0xe3 88#define PCI20xxx_EMPTY_ID 0xff 89 90#define PCI20000_OFFSET 0x100 91#define PCI20000_MODULES 3 92 93#define PCI20000_DIO_0 0x80 94#define PCI20000_DIO_1 0x81 95#define PCI20000_DIO_2 0xc0 96#define PCI20000_DIO_3 0xc1 97#define PCI20000_DIO_CONTROL_01 0x83 /* port 0, 1 control */ 98#define PCI20000_DIO_CONTROL_23 0xc3 /* port 2, 3 control */ 99#define PCI20000_DIO_BUFFER 0x82 /* buffer direction & enable */ 100#define PCI20000_DIO_EOC 0xef /* even port, control output */ 101#define PCI20000_DIO_OOC 0xfd /* odd port, control output */ 102#define PCI20000_DIO_EIC 0x90 /* even port, control input */ 103#define PCI20000_DIO_OIC 0x82 /* odd port, control input */ 104#define DIO_CAND 0x12 /* and bit 1 & 4 of control */ 105#define DIO_BE 0x01 /* buffer: port enable */ 106#define DIO_BO 0x04 /* buffer: output */ 107#define DIO_BI 0x05 /* buffer: input */ 108#define DIO_PS_0 0x00 /* buffer: port shift 0 */ 109#define DIO_PS_1 0x01 /* buffer: port shift 1 */ 110#define DIO_PS_2 0x04 /* buffer: port shift 2 */ 111#define DIO_PS_3 0x05 /* buffer: port shift 3 */ 112 113#define PCI20006_LCHAN0 0x0d 114#define PCI20006_STROBE0 0x0b 115#define PCI20006_LCHAN1 0x15 116#define PCI20006_STROBE1 0x13 117 118#define PCI20341_INIT 0x04 119#define PCI20341_REPMODE 0x00 /* single shot mode */ 120#define PCI20341_PACER 0x00 /* Hardware Pacer disabled */ 121#define PCI20341_CHAN_NR 0x04 /* number of input channels */ 122#define PCI20341_CONFIG_REG 0x10 123#define PCI20341_MOD_STATUS 0x01 124#define PCI20341_OPT_REG 0x11 125#define PCI20341_SET_TIME_REG 0x15 126#define PCI20341_LCHAN_ADDR_REG 0x13 127#define PCI20341_CHAN_LIST 0x80 128#define PCI20341_CC_RESET 0x1b 129#define PCI20341_CHAN_RESET 0x19 130#define PCI20341_SOFT_PACER 0x04 131#define PCI20341_STATUS_REG 0x12 132#define PCI20341_LDATA 0x02 133#define PCI20341_DAISY_CHAIN 0x20 /* On-board inputs only */ 134#define PCI20341_MUX 0x04 /* Enable on-board MUX */ 135#define PCI20341_SCANLIST 0x80 /* Channel/Gain Scan List */ 136 137union pci20xxx_subdev_private { 138 void *iobase; 139 struct { 140 void *iobase; 141 const struct comedi_lrange *ao_range_list[2]; 142 /* range of channels of ao module */ 143 unsigned int last_data[2]; 144 } pci20006; 145 struct { 146 void *iobase; 147 int timebase; 148 int settling_time; 149 int ai_gain; 150 } pci20341; 151}; 152 153struct pci20xxx_private { 154 155 void *ioaddr; 156 union pci20xxx_subdev_private subdev_private[PCI20000_MODULES]; 157}; 158 159#define devpriv ((struct pci20xxx_private *)dev->private) 160#define CHAN (CR_CHAN(it->chanlist[0])) 161 162static int pci20xxx_attach(struct comedi_device *dev, 163 struct comedi_devconfig *it); 164static int pci20xxx_detach(struct comedi_device *dev); 165 166static struct comedi_driver driver_pci20xxx = { 167 .driver_name = "ii_pci20kc", 168 .module = THIS_MODULE, 169 .attach = pci20xxx_attach, 170 .detach = pci20xxx_detach, 171}; 172 173static int pci20006_init(struct comedi_device *dev, struct comedi_subdevice *s, 174 int opt0, int opt1); 175static int pci20341_init(struct comedi_device *dev, struct comedi_subdevice *s, 176 int opt0, int opt1); 177static int pci20xxx_dio_init(struct comedi_device *dev, 178 struct comedi_subdevice *s); 179 180/* 181 options[0] Board base address 182 options[1] IRQ 183 options[2] first option for module 1 184 options[3] second option for module 1 185 options[4] first option for module 2 186 options[5] second option for module 2 187 options[6] first option for module 3 188 options[7] second option for module 3 189 190 options for PCI-20341M: 191 first Analog input gain configuration 192 0 == 1 193 1 == 10 194 2 == 100 195 3 == 200 196 197 options for PCI-20006M: 198 first Analog output channel 0 range configuration 199 0 == bipolar 10 (-10V -- +10V) 200 1 == unipolar 10V (0V -- +10V) 201 2 == bipolar 5V (-5V -- +5V) 202 second Analog output channel 1 range configuration 203 0 == bipolar 10 (-10V -- +10V) 204 1 == unipolar 10V (0V -- +10V) 205 2 == bipolar 5V (-5V -- +5V) 206*/ 207static int pci20xxx_attach(struct comedi_device *dev, 208 struct comedi_devconfig *it) 209{ 210 unsigned char i; 211 int ret; 212 int id; 213 struct comedi_subdevice *s; 214 union pci20xxx_subdev_private *sdp; 215 216 ret = alloc_subdevices(dev, 1 + PCI20000_MODULES); 217 if (ret < 0) 218 return ret; 219 220 ret = alloc_private(dev, sizeof(struct pci20xxx_private)); 221 if (ret < 0) 222 return ret; 223 224 devpriv->ioaddr = (void *)(unsigned long)it->options[0]; 225 dev->board_name = "pci20kc"; 226 227 /* Check PCI-20001 C-2A Carrier Board ID */ 228 if ((readb(devpriv->ioaddr) & PCI20000_ID) != PCI20000_ID) { 229 printk("comedi%d: ii_pci20kc", dev->minor); 230 printk 231 (" PCI-20001 C-2A Carrier Board at base=0x%p not found !\n", 232 devpriv->ioaddr); 233 return -EINVAL; 234 } 235 printk("comedi%d:\n", dev->minor); 236 printk("ii_pci20kc: PCI-20001 C-2A at base=0x%p\n", devpriv->ioaddr); 237 238 for (i = 0; i < PCI20000_MODULES; i++) { 239 s = dev->subdevices + i; 240 id = readb(devpriv->ioaddr + (i + 1) * PCI20000_OFFSET); 241 s->private = devpriv->subdev_private + i; 242 sdp = s->private; 243 switch (id) { 244 case PCI20006_ID: 245 sdp->pci20006.iobase = 246 devpriv->ioaddr + (i + 1) * PCI20000_OFFSET; 247 pci20006_init(dev, s, it->options[2 * i + 2], 248 it->options[2 * i + 3]); 249 printk("comedi%d: ii_pci20kc", dev->minor); 250 printk(" PCI-20006 module in slot %d \n", i + 1); 251 break; 252 case PCI20341_ID: 253 sdp->pci20341.iobase = 254 devpriv->ioaddr + (i + 1) * PCI20000_OFFSET; 255 pci20341_init(dev, s, it->options[2 * i + 2], 256 it->options[2 * i + 3]); 257 printk("comedi%d: ii_pci20kc", dev->minor); 258 printk(" PCI-20341 module in slot %d \n", i + 1); 259 break; 260 default: 261 printk 262 ("ii_pci20kc: unknown module code 0x%02x in slot %d: module disabled\n", 263 id, i); 264 /* fall through */ 265 case PCI20xxx_EMPTY_ID: 266 s->type = COMEDI_SUBD_UNUSED; 267 break; 268 } 269 } 270 271 /* initialize struct pci20xxx_private */ 272 pci20xxx_dio_init(dev, dev->subdevices + PCI20000_MODULES); 273 274 return 1; 275} 276 277static int pci20xxx_detach(struct comedi_device *dev) 278{ 279 printk("comedi%d: pci20xxx: remove\n", dev->minor); 280 281 return 0; 282} 283 284/* pci20006m */ 285 286static int pci20006_insn_read(struct comedi_device *dev, 287 struct comedi_subdevice *s, 288 struct comedi_insn *insn, unsigned int *data); 289static int pci20006_insn_write(struct comedi_device *dev, 290 struct comedi_subdevice *s, 291 struct comedi_insn *insn, unsigned int *data); 292 293static const struct comedi_lrange *pci20006_range_list[] = { 294 &range_bipolar10, 295 &range_unipolar10, 296 &range_bipolar5, 297}; 298 299static int pci20006_init(struct comedi_device *dev, struct comedi_subdevice *s, 300 int opt0, int opt1) 301{ 302 union pci20xxx_subdev_private *sdp = s->private; 303 304 if (opt0 < 0 || opt0 > 2) 305 opt0 = 0; 306 if (opt1 < 0 || opt1 > 2) 307 opt1 = 0; 308 309 sdp->pci20006.ao_range_list[0] = pci20006_range_list[opt0]; 310 sdp->pci20006.ao_range_list[1] = pci20006_range_list[opt1]; 311 312 /* ao subdevice */ 313 s->type = COMEDI_SUBD_AO; 314 s->subdev_flags = SDF_WRITABLE; 315 s->n_chan = 2; 316 s->len_chanlist = 2; 317 s->insn_read = pci20006_insn_read; 318 s->insn_write = pci20006_insn_write; 319 s->maxdata = 0xffff; 320 s->range_table_list = sdp->pci20006.ao_range_list; 321 return 0; 322} 323 324static int pci20006_insn_read(struct comedi_device *dev, 325 struct comedi_subdevice *s, 326 struct comedi_insn *insn, unsigned int *data) 327{ 328 union pci20xxx_subdev_private *sdp = s->private; 329 330 data[0] = sdp->pci20006.last_data[CR_CHAN(insn->chanspec)]; 331 332 return 1; 333} 334 335static int pci20006_insn_write(struct comedi_device *dev, 336 struct comedi_subdevice *s, 337 struct comedi_insn *insn, unsigned int *data) 338{ 339 union pci20xxx_subdev_private *sdp = s->private; 340 int hi, lo; 341 unsigned int boarddata; 342 343 sdp->pci20006.last_data[CR_CHAN(insn->chanspec)] = data[0]; 344 boarddata = (((unsigned int)data[0] + 0x8000) & 0xffff); 345 /* comedi-data -> board-data */ 346 lo = (boarddata & 0xff); 347 hi = ((boarddata >> 8) & 0xff); 348 349 switch (CR_CHAN(insn->chanspec)) { 350 case 0: 351 writeb(lo, sdp->iobase + PCI20006_LCHAN0); 352 writeb(hi, sdp->iobase + PCI20006_LCHAN0 + 1); 353 writeb(0x00, sdp->iobase + PCI20006_STROBE0); 354 break; 355 case 1: 356 writeb(lo, sdp->iobase + PCI20006_LCHAN1); 357 writeb(hi, sdp->iobase + PCI20006_LCHAN1 + 1); 358 writeb(0x00, sdp->iobase + PCI20006_STROBE1); 359 break; 360 default: 361 printk(" comedi%d: pci20xxx: ao channel Error!\n", dev->minor); 362 return -EINVAL; 363 } 364 365 return 1; 366} 367 368/* PCI20341M */ 369 370static int pci20341_insn_read(struct comedi_device *dev, 371 struct comedi_subdevice *s, 372 struct comedi_insn *insn, unsigned int *data); 373 374static const int pci20341_timebase[] = { 0x00, 0x00, 0x00, 0x04 }; 375static const int pci20341_settling_time[] = { 0x58, 0x58, 0x93, 0x99 }; 376 377static const struct comedi_lrange range_bipolar0_5 = { 1, {BIP_RANGE(0.5)} }; 378static const struct comedi_lrange range_bipolar0_05 = { 1, {BIP_RANGE(0.05)} }; 379static const struct comedi_lrange range_bipolar0_025 = { 1, {BIP_RANGE(0.025)} }; 380 381static const struct comedi_lrange *const pci20341_ranges[] = { 382 &range_bipolar5, 383 &range_bipolar0_5, 384 &range_bipolar0_05, 385 &range_bipolar0_025, 386}; 387 388static int pci20341_init(struct comedi_device *dev, struct comedi_subdevice *s, 389 int opt0, int opt1) 390{ 391 union pci20xxx_subdev_private *sdp = s->private; 392 int option; 393 394 /* options handling */ 395 if (opt0 < 0 || opt0 > 3) 396 opt0 = 0; 397 sdp->pci20341.timebase = pci20341_timebase[opt0]; 398 sdp->pci20341.settling_time = pci20341_settling_time[opt0]; 399 400 /* ai subdevice */ 401 s->type = COMEDI_SUBD_AI; 402 s->subdev_flags = SDF_READABLE; 403 s->n_chan = PCI20341_CHAN_NR; 404 s->len_chanlist = PCI20341_SCANLIST; 405 s->insn_read = pci20341_insn_read; 406 s->maxdata = 0xffff; 407 s->range_table = pci20341_ranges[opt0]; 408 409 option = sdp->pci20341.timebase | PCI20341_REPMODE; /* depends on gain, trigger, repetition mode */ 410 411 writeb(PCI20341_INIT, sdp->iobase + PCI20341_CONFIG_REG); /* initialize Module */ 412 writeb(PCI20341_PACER, sdp->iobase + PCI20341_MOD_STATUS); /* set Pacer */ 413 writeb(option, sdp->iobase + PCI20341_OPT_REG); /* option register */ 414 writeb(sdp->pci20341.settling_time, sdp->iobase + PCI20341_SET_TIME_REG); /* settling time counter */ 415 /* trigger not implemented */ 416 return 0; 417} 418 419static int pci20341_insn_read(struct comedi_device *dev, 420 struct comedi_subdevice *s, 421 struct comedi_insn *insn, unsigned int *data) 422{ 423 union pci20xxx_subdev_private *sdp = s->private; 424 unsigned int i = 0, j = 0; 425 int lo, hi; 426 unsigned char eoc; /* end of conversion */ 427 unsigned int clb; /* channel list byte */ 428 unsigned int boarddata; 429 430 writeb(1, sdp->iobase + PCI20341_LCHAN_ADDR_REG); /* write number of input channels */ 431 clb = PCI20341_DAISY_CHAIN | PCI20341_MUX | (sdp->pci20341.ai_gain << 3) 432 | CR_CHAN(insn->chanspec); 433 writeb(clb, sdp->iobase + PCI20341_CHAN_LIST); 434 writeb(0x00, sdp->iobase + PCI20341_CC_RESET); /* reset settling time counter and trigger delay counter */ 435 writeb(0x00, sdp->iobase + PCI20341_CHAN_RESET); 436 437 /* generate Pacer */ 438 439 for (i = 0; i < insn->n; i++) { 440 /* data polling isn't the niciest way to get the data, I know, 441 * but there are only 6 cycles (mean) and it is easier than 442 * the whole interrupt stuff 443 */ 444 j = 0; 445 readb(sdp->iobase + PCI20341_SOFT_PACER); /* generate Pacer */ 446 eoc = readb(sdp->iobase + PCI20341_STATUS_REG); 447 while ((eoc < 0x80) && j < 100) { /* poll Interrupt Flag */ 448 j++; 449 eoc = readb(sdp->iobase + PCI20341_STATUS_REG); 450 } 451 if (j >= 100) { 452 printk 453 ("comedi%d: pci20xxx: AI interrupt channel %i polling exit !\n", 454 dev->minor, i); 455 return -EINVAL; 456 } 457 lo = readb(sdp->iobase + PCI20341_LDATA); 458 hi = readb(sdp->iobase + PCI20341_LDATA + 1); 459 boarddata = lo + 0x100 * hi; 460 data[i] = (short)((boarddata + 0x8000) & 0xffff); /* board-data -> comedi-data */ 461 } 462 463 return i; 464} 465 466/* native DIO */ 467 468static void pci20xxx_dio_config(struct comedi_device *dev, 469 struct comedi_subdevice *s); 470static int pci20xxx_dio_insn_bits(struct comedi_device *dev, 471 struct comedi_subdevice *s, 472 struct comedi_insn *insn, unsigned int *data); 473static int pci20xxx_dio_insn_config(struct comedi_device *dev, 474 struct comedi_subdevice *s, 475 struct comedi_insn *insn, 476 unsigned int *data); 477 478/* initialize struct pci20xxx_private */ 479static int pci20xxx_dio_init(struct comedi_device *dev, 480 struct comedi_subdevice *s) 481{ 482 483 s->type = COMEDI_SUBD_DIO; 484 s->subdev_flags = SDF_READABLE | SDF_WRITABLE; 485 s->n_chan = 32; 486 s->insn_bits = pci20xxx_dio_insn_bits; 487 s->insn_config = pci20xxx_dio_insn_config; 488 s->maxdata = 1; 489 s->len_chanlist = 32; 490 s->range_table = &range_digital; 491 s->io_bits = 0; 492 493 /* digital I/O lines default to input on board reset. */ 494 pci20xxx_dio_config(dev, s); 495 496 return 0; 497} 498 499static int pci20xxx_dio_insn_config(struct comedi_device *dev, 500 struct comedi_subdevice *s, 501 struct comedi_insn *insn, 502 unsigned int *data) 503{ 504 int mask, bits; 505 506 mask = 1 << CR_CHAN(insn->chanspec); 507 if (mask & 0x000000ff) 508 bits = 0x000000ff; 509 else if (mask & 0x0000ff00) 510 bits = 0x0000ff00; 511 else if (mask & 0x00ff0000) 512 bits = 0x00ff0000; 513 else 514 bits = 0xff000000; 515 if (data[0]) 516 s->io_bits |= bits; 517 else 518 s->io_bits &= ~bits; 519 pci20xxx_dio_config(dev, s); 520 521 return 1; 522} 523 524static int pci20xxx_dio_insn_bits(struct comedi_device *dev, 525 struct comedi_subdevice *s, 526 struct comedi_insn *insn, unsigned int *data) 527{ 528 unsigned int mask = data[0]; 529 530 s->state &= ~mask; 531 s->state |= (mask & data[1]); 532 533 mask &= s->io_bits; 534 if (mask & 0x000000ff) 535 writeb((s->state >> 0) & 0xff, 536 devpriv->ioaddr + PCI20000_DIO_0); 537 if (mask & 0x0000ff00) 538 writeb((s->state >> 8) & 0xff, 539 devpriv->ioaddr + PCI20000_DIO_1); 540 if (mask & 0x00ff0000) 541 writeb((s->state >> 16) & 0xff, 542 devpriv->ioaddr + PCI20000_DIO_2); 543 if (mask & 0xff000000) 544 writeb((s->state >> 24) & 0xff, 545 devpriv->ioaddr + PCI20000_DIO_3); 546 547 data[1] = readb(devpriv->ioaddr + PCI20000_DIO_0); 548 data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8; 549 data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16; 550 data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24; 551 552 return 2; 553} 554 555static void pci20xxx_dio_config(struct comedi_device *dev, 556 struct comedi_subdevice *s) 557{ 558 unsigned char control_01; 559 unsigned char control_23; 560 unsigned char buffer; 561 562 control_01 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_01); 563 control_23 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_23); 564 buffer = readb(devpriv->ioaddr + PCI20000_DIO_BUFFER); 565 566 if (s->io_bits & 0x000000ff) { 567 /* output port 0 */ 568 control_01 &= PCI20000_DIO_EOC; 569 buffer = (buffer & (~(DIO_BE << DIO_PS_0))) | (DIO_BO << 570 DIO_PS_0); 571 } else { 572 /* input port 0 */ 573 control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_EIC; 574 buffer = (buffer & (~(DIO_BI << DIO_PS_0))); 575 } 576 if (s->io_bits & 0x0000ff00) { 577 /* output port 1 */ 578 control_01 &= PCI20000_DIO_OOC; 579 buffer = (buffer & (~(DIO_BE << DIO_PS_1))) | (DIO_BO << 580 DIO_PS_1); 581 } else { 582 /* input port 1 */ 583 control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_OIC; 584 buffer = (buffer & (~(DIO_BI << DIO_PS_1))); 585 } 586 if (s->io_bits & 0x00ff0000) { 587 /* output port 2 */ 588 control_23 &= PCI20000_DIO_EOC; 589 buffer = (buffer & (~(DIO_BE << DIO_PS_2))) | (DIO_BO << 590 DIO_PS_2); 591 } else { 592 /* input port 2 */ 593 control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_EIC; 594 buffer = (buffer & (~(DIO_BI << DIO_PS_2))); 595 } 596 if (s->io_bits & 0xff000000) { 597 /* output port 3 */ 598 control_23 &= PCI20000_DIO_OOC; 599 buffer = (buffer & (~(DIO_BE << DIO_PS_3))) | (DIO_BO << 600 DIO_PS_3); 601 } else { 602 /* input port 3 */ 603 control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_OIC; 604 buffer = (buffer & (~(DIO_BI << DIO_PS_3))); 605 } 606 writeb(control_01, devpriv->ioaddr + PCI20000_DIO_CONTROL_01); 607 writeb(control_23, devpriv->ioaddr + PCI20000_DIO_CONTROL_23); 608 writeb(buffer, devpriv->ioaddr + PCI20000_DIO_BUFFER); 609} 610 611#if 0 612static void pci20xxx_do(struct comedi_device *dev, struct comedi_subdevice *s) 613{ 614 /* XXX if the channel is configured for input, does this 615 do bad things? */ 616 /* XXX it would be a good idea to only update the registers 617 that _need_ to be updated. This requires changes to 618 comedi, however. */ 619 writeb((s->state >> 0) & 0xff, devpriv->ioaddr + PCI20000_DIO_0); 620 writeb((s->state >> 8) & 0xff, devpriv->ioaddr + PCI20000_DIO_1); 621 writeb((s->state >> 16) & 0xff, devpriv->ioaddr + PCI20000_DIO_2); 622 writeb((s->state >> 24) & 0xff, devpriv->ioaddr + PCI20000_DIO_3); 623} 624 625static unsigned int pci20xxx_di(struct comedi_device *dev, 626 struct comedi_subdevice *s) 627{ 628 /* XXX same note as above */ 629 unsigned int bits; 630 631 bits = readb(devpriv->ioaddr + PCI20000_DIO_0); 632 bits |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8; 633 bits |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16; 634 bits |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24; 635 636 return bits; 637} 638#endif 639 640COMEDI_INITCLEANUP(driver_pci20xxx); 641