ii_pci20kc.c revision 0a85b6f0ab0d2edb0d41b32697111ce0e4f43496
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 instead of 4 digital ports 27 * di-port == Port 0 28 * do-port == Port 1 29 * 30 * The state of this driver is only a starting point for a complete 31 * COMEDI-driver. The final driver should support all features of the 32 * carrier board and modules. 33 * 34 * The test configuration: 35 * 36 * kernel 2.2.14 with RTAI v1.2 and patch-2.2.14rthal2 37 * COMEDI 0.7.45 38 * COMEDILIB 0.7.9 39 * 40 */ 41/* 42Driver: ii_pci20kc 43Description: Intelligent Instruments PCI-20001C carrier board 44Author: Markus Kempf <kempf@matsci.uni-sb.de> 45Devices: [Intelligent Instrumentation] PCI-20001C (ii_pci20kc) 46Status: works 47 48Supports the PCI-20001 C-2a Carrier board, and could probably support 49the other carrier boards with small modifications. Modules supported 50are: 51 PCI-20006 M-2 16-bit analog output module 52 PCI-20341 M-1A 16-bit analog input module 53 54Options: 55 0 Board base address 56 1 IRQ 57 2 first option for module 1 58 3 second option for module 1 59 4 first option for module 2 60 5 second option for module 2 61 6 first option for module 3 62 7 second option for module 3 63 64options for PCI-20006M: 65 first: Analog output channel 0 range configuration 66 0 bipolar 10 (-10V -- +10V) 67 1 unipolar 10 (0V -- +10V) 68 2 bipolar 5 (-5V -- 5V) 69 second: Analog output channel 1 range configuration 70 71options for PCI-20341M: 72 first: Analog input gain configuration 73 0 1 74 1 10 75 2 100 76 3 200 77*/ 78 79/* XXX needs to use ioremap() for compatibility with 2.4 kernels. Should also 80 * check_mem_region() etc. - fmhess */ 81 82#include "../comedidev.h" 83 84#define PCI20000_ID 0x1d 85#define PCI20341_ID 0x77 86#define PCI20006_ID 0xe3 87#define PCI20xxx_EMPTY_ID 0xff 88 89#define PCI20000_OFFSET 0x100 90#define PCI20000_MODULES 3 91 92#define PCI20000_DIO_0 0x80 93#define PCI20000_DIO_1 0x81 94#define PCI20000_DIO_2 0xc0 95#define PCI20000_DIO_3 0xc1 96#define PCI20000_DIO_CONTROL_01 0x83 /* port 0, 1 control */ 97#define PCI20000_DIO_CONTROL_23 0xc3 /* port 2, 3 control */ 98#define PCI20000_DIO_BUFFER 0x82 /* buffer direction and enable */ 99#define PCI20000_DIO_EOC 0xef /* even port, control output */ 100#define PCI20000_DIO_OOC 0xfd /* odd port, control output */ 101#define PCI20000_DIO_EIC 0x90 /* even port, control input */ 102#define PCI20000_DIO_OIC 0x82 /* odd port, control input */ 103#define DIO_CAND 0x12 /* and bit 1, bit 4 of control */ 104#define DIO_BE 0x01 /* buffer: port enable */ 105#define DIO_BO 0x04 /* buffer: output */ 106#define DIO_BI 0x05 /* buffer: input */ 107#define DIO_PS_0 0x00 /* buffer: port shift 0 */ 108#define DIO_PS_1 0x01 /* buffer: port shift 1 */ 109#define DIO_PS_2 0x04 /* buffer: port shift 2 */ 110#define DIO_PS_3 0x05 /* buffer: port shift 3 */ 111 112#define PCI20006_LCHAN0 0x0d 113#define PCI20006_STROBE0 0x0b 114#define PCI20006_LCHAN1 0x15 115#define PCI20006_STROBE1 0x13 116 117#define PCI20341_INIT 0x04 118#define PCI20341_REPMODE 0x00 /* single shot mode */ 119#define PCI20341_PACER 0x00 /* Hardware Pacer disabled */ 120#define PCI20341_CHAN_NR 0x04 /* number of input channels */ 121#define PCI20341_CONFIG_REG 0x10 122#define PCI20341_MOD_STATUS 0x01 123#define PCI20341_OPT_REG 0x11 124#define PCI20341_SET_TIME_REG 0x15 125#define PCI20341_LCHAN_ADDR_REG 0x13 126#define PCI20341_CHAN_LIST 0x80 127#define PCI20341_CC_RESET 0x1b 128#define PCI20341_CHAN_RESET 0x19 129#define PCI20341_SOFT_PACER 0x04 130#define PCI20341_STATUS_REG 0x12 131#define PCI20341_LDATA 0x02 132#define PCI20341_DAISY_CHAIN 0x20 /* On-board inputs only */ 133#define PCI20341_MUX 0x04 /* Enable on-board MUX */ 134#define PCI20341_SCANLIST 0x80 /* Channel/Gain Scan List */ 135 136union pci20xxx_subdev_private { 137 void *iobase; 138 struct { 139 void *iobase; 140 const struct comedi_lrange *ao_range_list[2]; /* range of channels of ao module */ 141 unsigned int last_data[2]; 142 } pci20006; 143 struct { 144 void *iobase; 145 int timebase; 146 int settling_time; 147 int ai_gain; 148 } pci20341; 149}; 150 151struct pci20xxx_private { 152 153 void *ioaddr; 154 union pci20xxx_subdev_private subdev_private[PCI20000_MODULES]; 155}; 156 157#define devpriv ((struct pci20xxx_private *)dev->private) 158#define CHAN (CR_CHAN(it->chanlist[0])) 159 160static int pci20xxx_attach(struct comedi_device *dev, 161 struct comedi_devconfig *it); 162static int pci20xxx_detach(struct comedi_device *dev); 163 164static struct comedi_driver driver_pci20xxx = { 165 .driver_name = "ii_pci20kc", 166 .module = THIS_MODULE, 167 .attach = pci20xxx_attach, 168 .detach = pci20xxx_detach, 169}; 170 171static int pci20006_init(struct comedi_device *dev, struct comedi_subdevice *s, 172 int opt0, int opt1); 173static int pci20341_init(struct comedi_device *dev, struct comedi_subdevice *s, 174 int opt0, int opt1); 175static int pci20xxx_dio_init(struct comedi_device *dev, 176 struct comedi_subdevice *s); 177 178/* 179 options[0] Board base address 180 options[1] IRQ 181 options[2] first option for module 1 182 options[3] second option for module 1 183 options[4] first option for module 2 184 options[5] second option for module 2 185 options[6] first option for module 3 186 options[7] second option for module 3 187 188 options for PCI-20341M: 189 first Analog input gain configuration 190 0 == 1 191 1 == 10 192 2 == 100 193 3 == 200 194 195 options for PCI-20006M: 196 first Analog output channel 0 range configuration 197 0 == bipolar 10 (-10V -- +10V) 198 1 == unipolar 10V (0V -- +10V) 199 2 == bipolar 5V (-5V -- +5V) 200 second Analog output channel 1 range configuration 201 0 == bipolar 10 (-10V -- +10V) 202 1 == unipolar 10V (0V -- +10V) 203 2 == bipolar 5V (-5V -- +5V) 204*/ 205static int pci20xxx_attach(struct comedi_device *dev, 206 struct comedi_devconfig *it) 207{ 208 unsigned char i; 209 int ret; 210 int id; 211 struct comedi_subdevice *s; 212 union pci20xxx_subdev_private *sdp; 213 214 ret = alloc_subdevices(dev, 1 + PCI20000_MODULES); 215 if (ret < 0) 216 return ret; 217 218 ret = alloc_private(dev, sizeof(struct pci20xxx_private)); 219 if (ret < 0) 220 return ret; 221 222 devpriv->ioaddr = (void *)(unsigned long)it->options[0]; 223 dev->board_name = "pci20kc"; 224 225 /* Check PCI-20001 C-2A Carrier Board ID */ 226 if ((readb(devpriv->ioaddr) & PCI20000_ID) != PCI20000_ID) { 227 printk("comedi%d: ii_pci20kc", dev->minor); 228 printk 229 (" PCI-20001 C-2A Carrier Board at base=0x%p not found !\n", 230 devpriv->ioaddr); 231 return -EINVAL; 232 } 233 printk("comedi%d:\n", dev->minor); 234 printk("ii_pci20kc: PCI-20001 C-2A at base=0x%p\n", devpriv->ioaddr); 235 236 for (i = 0; i < PCI20000_MODULES; i++) { 237 s = dev->subdevices + i; 238 id = readb(devpriv->ioaddr + (i + 1) * PCI20000_OFFSET); 239 s->private = devpriv->subdev_private + i; 240 sdp = s->private; 241 switch (id) { 242 case PCI20006_ID: 243 sdp->pci20006.iobase = 244 devpriv->ioaddr + (i + 1) * PCI20000_OFFSET; 245 pci20006_init(dev, s, it->options[2 * i + 2], 246 it->options[2 * i + 3]); 247 printk("comedi%d: ii_pci20kc", dev->minor); 248 printk(" PCI-20006 module in slot %d \n", i + 1); 249 break; 250 case PCI20341_ID: 251 sdp->pci20341.iobase = 252 devpriv->ioaddr + (i + 1) * PCI20000_OFFSET; 253 pci20341_init(dev, s, it->options[2 * i + 2], 254 it->options[2 * i + 3]); 255 printk("comedi%d: ii_pci20kc", dev->minor); 256 printk(" PCI-20341 module in slot %d \n", i + 1); 257 break; 258 default: 259 printk 260 ("ii_pci20kc: unknown module code 0x%02x in slot %d: module disabled\n", 261 id, i); 262 /* fall through */ 263 case PCI20xxx_EMPTY_ID: 264 s->type = COMEDI_SUBD_UNUSED; 265 break; 266 } 267 } 268 269 /* initialize struct pci20xxx_private */ 270 pci20xxx_dio_init(dev, dev->subdevices + PCI20000_MODULES); 271 272 return 1; 273} 274 275static int pci20xxx_detach(struct comedi_device *dev) 276{ 277 printk("comedi%d: pci20xxx: remove\n", dev->minor); 278 279 return 0; 280} 281 282/* pci20006m */ 283 284static int pci20006_insn_read(struct comedi_device *dev, 285 struct comedi_subdevice *s, 286 struct comedi_insn *insn, unsigned int *data); 287static int pci20006_insn_write(struct comedi_device *dev, 288 struct comedi_subdevice *s, 289 struct comedi_insn *insn, unsigned int *data); 290 291static const struct comedi_lrange *pci20006_range_list[] = { 292 &range_bipolar10, 293 &range_unipolar10, 294 &range_bipolar5, 295}; 296 297static int pci20006_init(struct comedi_device *dev, struct comedi_subdevice *s, 298 int opt0, int opt1) 299{ 300 union pci20xxx_subdev_private *sdp = s->private; 301 302 if (opt0 < 0 || opt0 > 2) 303 opt0 = 0; 304 if (opt1 < 0 || opt1 > 2) 305 opt1 = 0; 306 307 sdp->pci20006.ao_range_list[0] = pci20006_range_list[opt0]; 308 sdp->pci20006.ao_range_list[1] = pci20006_range_list[opt1]; 309 310 /* ao subdevice */ 311 s->type = COMEDI_SUBD_AO; 312 s->subdev_flags = SDF_WRITABLE; 313 s->n_chan = 2; 314 s->len_chanlist = 2; 315 s->insn_read = pci20006_insn_read; 316 s->insn_write = pci20006_insn_write; 317 s->maxdata = 0xffff; 318 s->range_table_list = sdp->pci20006.ao_range_list; 319 return 0; 320} 321 322static int pci20006_insn_read(struct comedi_device *dev, 323 struct comedi_subdevice *s, 324 struct comedi_insn *insn, unsigned int *data) 325{ 326 union pci20xxx_subdev_private *sdp = s->private; 327 328 data[0] = sdp->pci20006.last_data[CR_CHAN(insn->chanspec)]; 329 330 return 1; 331} 332 333static int pci20006_insn_write(struct comedi_device *dev, 334 struct comedi_subdevice *s, 335 struct comedi_insn *insn, unsigned int *data) 336{ 337 union pci20xxx_subdev_private *sdp = s->private; 338 int hi, lo; 339 unsigned int boarddata; 340 341 sdp->pci20006.last_data[CR_CHAN(insn->chanspec)] = data[0]; 342 boarddata = (((unsigned int)data[0] + 0x8000) & 0xffff); /* comedi-data -> board-data */ 343 lo = (boarddata & 0xff); 344 hi = ((boarddata >> 8) & 0xff); 345 346 switch (CR_CHAN(insn->chanspec)) { 347 case 0: 348 writeb(lo, sdp->iobase + PCI20006_LCHAN0); 349 writeb(hi, sdp->iobase + PCI20006_LCHAN0 + 1); 350 writeb(0x00, sdp->iobase + PCI20006_STROBE0); 351 break; 352 case 1: 353 writeb(lo, sdp->iobase + PCI20006_LCHAN1); 354 writeb(hi, sdp->iobase + PCI20006_LCHAN1 + 1); 355 writeb(0x00, sdp->iobase + PCI20006_STROBE1); 356 break; 357 default: 358 printk(" comedi%d: pci20xxx: ao channel Error!\n", dev->minor); 359 return -EINVAL; 360 } 361 362 return 1; 363} 364 365/* PCI20341M */ 366 367static int pci20341_insn_read(struct comedi_device *dev, 368 struct comedi_subdevice *s, 369 struct comedi_insn *insn, unsigned int *data); 370 371static const int pci20341_timebase[] = { 0x00, 0x00, 0x00, 0x04 }; 372static const int pci20341_settling_time[] = { 0x58, 0x58, 0x93, 0x99 }; 373 374static const struct comedi_lrange range_bipolar0_5 = { 1, {BIP_RANGE(0.5)} }; 375static const struct comedi_lrange range_bipolar0_05 = { 1, {BIP_RANGE(0.05)} }; 376static const struct comedi_lrange range_bipolar0_025 = 377 { 1, {BIP_RANGE(0.025)} }; 378 379static const struct comedi_lrange *const pci20341_ranges[] = { 380 &range_bipolar5, 381 &range_bipolar0_5, 382 &range_bipolar0_05, 383 &range_bipolar0_025, 384}; 385 386static int pci20341_init(struct comedi_device *dev, struct comedi_subdevice *s, 387 int opt0, int opt1) 388{ 389 union pci20xxx_subdev_private *sdp = s->private; 390 int option; 391 392 /* options handling */ 393 if (opt0 < 0 || opt0 > 3) 394 opt0 = 0; 395 sdp->pci20341.timebase = pci20341_timebase[opt0]; 396 sdp->pci20341.settling_time = pci20341_settling_time[opt0]; 397 398 /* ai subdevice */ 399 s->type = COMEDI_SUBD_AI; 400 s->subdev_flags = SDF_READABLE; 401 s->n_chan = PCI20341_CHAN_NR; 402 s->len_chanlist = PCI20341_SCANLIST; 403 s->insn_read = pci20341_insn_read; 404 s->maxdata = 0xffff; 405 s->range_table = pci20341_ranges[opt0]; 406 407 option = sdp->pci20341.timebase | PCI20341_REPMODE; /* depends on gain, trigger, repetition mode */ 408 409 writeb(PCI20341_INIT, sdp->iobase + PCI20341_CONFIG_REG); /* initialize Module */ 410 writeb(PCI20341_PACER, sdp->iobase + PCI20341_MOD_STATUS); /* set Pacer */ 411 writeb(option, sdp->iobase + PCI20341_OPT_REG); /* option register */ 412 writeb(sdp->pci20341.settling_time, sdp->iobase + PCI20341_SET_TIME_REG); /* settling time counter */ 413 /* trigger not implemented */ 414 return 0; 415} 416 417static int pci20341_insn_read(struct comedi_device *dev, 418 struct comedi_subdevice *s, 419 struct comedi_insn *insn, unsigned int *data) 420{ 421 union pci20xxx_subdev_private *sdp = s->private; 422 unsigned int i = 0, j = 0; 423 int lo, hi; 424 unsigned char eoc; /* end of conversion */ 425 unsigned int clb; /* channel list byte */ 426 unsigned int boarddata; 427 428 writeb(1, sdp->iobase + PCI20341_LCHAN_ADDR_REG); /* write number of input channels */ 429 clb = PCI20341_DAISY_CHAIN | PCI20341_MUX | (sdp->pci20341.ai_gain << 3) 430 | CR_CHAN(insn->chanspec); 431 writeb(clb, sdp->iobase + PCI20341_CHAN_LIST); 432 writeb(0x00, sdp->iobase + PCI20341_CC_RESET); /* reset settling time counter and trigger delay counter */ 433 writeb(0x00, sdp->iobase + PCI20341_CHAN_RESET); 434 435 /* generate Pacer */ 436 437 for (i = 0; i < insn->n; i++) { 438 /* data polling isn't the niciest way to get the data, I know, 439 * but there are only 6 cycles (mean) and it is easier than 440 * the whole interrupt stuff 441 */ 442 j = 0; 443 readb(sdp->iobase + PCI20341_SOFT_PACER); /* generate Pacer */ 444 eoc = readb(sdp->iobase + PCI20341_STATUS_REG); 445 while ((eoc < 0x80) && j < 100) { /* poll Interrupt Flag */ 446 j++; 447 eoc = readb(sdp->iobase + PCI20341_STATUS_REG); 448 } 449 if (j >= 100) { 450 printk 451 ("comedi%d: pci20xxx: AI interrupt channel %i polling exit !\n", 452 dev->minor, i); 453 return -EINVAL; 454 } 455 lo = readb(sdp->iobase + PCI20341_LDATA); 456 hi = readb(sdp->iobase + PCI20341_LDATA + 1); 457 boarddata = lo + 0x100 * hi; 458 data[i] = (short)((boarddata + 0x8000) & 0xffff); /* board-data -> comedi-data */ 459 } 460 461 return i; 462} 463 464/* native DIO */ 465 466static void pci20xxx_dio_config(struct comedi_device *dev, 467 struct comedi_subdevice *s); 468static int pci20xxx_dio_insn_bits(struct comedi_device *dev, 469 struct comedi_subdevice *s, 470 struct comedi_insn *insn, unsigned int *data); 471static int pci20xxx_dio_insn_config(struct comedi_device *dev, 472 struct comedi_subdevice *s, 473 struct comedi_insn *insn, 474 unsigned int *data); 475 476/* initialize struct pci20xxx_private */ 477static int pci20xxx_dio_init(struct comedi_device *dev, 478 struct comedi_subdevice *s) 479{ 480 481 s->type = COMEDI_SUBD_DIO; 482 s->subdev_flags = SDF_READABLE | SDF_WRITABLE; 483 s->n_chan = 32; 484 s->insn_bits = pci20xxx_dio_insn_bits; 485 s->insn_config = pci20xxx_dio_insn_config; 486 s->maxdata = 1; 487 s->len_chanlist = 32; 488 s->range_table = &range_digital; 489 s->io_bits = 0; 490 491 /* digital I/O lines default to input on board reset. */ 492 pci20xxx_dio_config(dev, s); 493 494 return 0; 495} 496 497static int pci20xxx_dio_insn_config(struct comedi_device *dev, 498 struct comedi_subdevice *s, 499 struct comedi_insn *insn, 500 unsigned int *data) 501{ 502 int mask, bits; 503 504 mask = 1 << CR_CHAN(insn->chanspec); 505 if (mask & 0x000000ff) { 506 bits = 0x000000ff; 507 } else if (mask & 0x0000ff00) { 508 bits = 0x0000ff00; 509 } else if (mask & 0x00ff0000) { 510 bits = 0x00ff0000; 511 } else { 512 bits = 0xff000000; 513 } 514 if (data[0]) { 515 s->io_bits |= bits; 516 } else { 517 s->io_bits &= ~bits; 518 } 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