ii_pci20kc.c revision 90035c0886b256d75bced13b3b3cea5234aff136
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 136typedef union { 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} pci20xxx_subdev_private; 150 151typedef struct { 152 void *ioaddr; 153 pci20xxx_subdev_private subdev_private[PCI20000_MODULES]; 154} pci20xxx_private; 155 156#define devpriv ((pci20xxx_private *)dev->private) 157#define CHAN (CR_CHAN(it->chanlist[0])) 158 159static int pci20xxx_attach(struct comedi_device * dev, comedi_devconfig * it); 160static int pci20xxx_detach(struct comedi_device * dev); 161 162static struct comedi_driver driver_pci20xxx = { 163 driver_name:"ii_pci20kc", 164 module:THIS_MODULE, 165 attach:pci20xxx_attach, 166 detach:pci20xxx_detach, 167}; 168 169static int pci20006_init(struct comedi_device * dev, struct comedi_subdevice * s, 170 int opt0, int opt1); 171static int pci20341_init(struct comedi_device * dev, struct comedi_subdevice * s, 172 int opt0, int opt1); 173static int pci20xxx_dio_init(struct comedi_device * dev, struct comedi_subdevice * s); 174 175/* 176 options[0] Board base address 177 options[1] IRQ 178 options[2] first option for module 1 179 options[3] second option for module 1 180 options[4] first option for module 2 181 options[5] second option for module 2 182 options[6] first option for module 3 183 options[7] second option for module 3 184 185 options for PCI-20341M: 186 first Analog input gain configuration 187 0 == 1 188 1 == 10 189 2 == 100 190 3 == 200 191 192 options for PCI-20006M: 193 first Analog output channel 0 range configuration 194 0 == bipolar 10 (-10V -- +10V) 195 1 == unipolar 10V (0V -- +10V) 196 2 == bipolar 5V (-5V -- +5V) 197 second Analog output channel 1 range configuration 198 0 == bipolar 10 (-10V -- +10V) 199 1 == unipolar 10V (0V -- +10V) 200 2 == bipolar 5V (-5V -- +5V) 201*/ 202static int pci20xxx_attach(struct comedi_device * dev, comedi_devconfig * it) 203{ 204 unsigned char i; 205 int ret; 206 int id; 207 struct comedi_subdevice *s; 208 pci20xxx_subdev_private *sdp; 209 210 if ((ret = alloc_subdevices(dev, 1 + PCI20000_MODULES)) < 0) 211 return ret; 212 if ((ret = alloc_private(dev, sizeof(pci20xxx_private))) < 0) 213 return ret; 214 215 devpriv->ioaddr = (void *)(unsigned long)it->options[0]; 216 dev->board_name = "pci20kc"; 217 218 /* Check PCI-20001 C-2A Carrier Board ID */ 219 if ((readb(devpriv->ioaddr) & PCI20000_ID) != PCI20000_ID) { 220 printk("comedi%d: ii_pci20kc", dev->minor); 221 printk(" PCI-20001 C-2A Carrier Board at base=0x%p not found !\n", devpriv->ioaddr); 222 return -EINVAL; 223 } 224 printk("comedi%d:\n", dev->minor); 225 printk("ii_pci20kc: PCI-20001 C-2A at base=0x%p\n", devpriv->ioaddr); 226 227 for (i = 0; i < PCI20000_MODULES; i++) { 228 s = dev->subdevices + i; 229 id = readb(devpriv->ioaddr + (i + 1) * PCI20000_OFFSET); 230 s->private = devpriv->subdev_private + i; 231 sdp = s->private; 232 switch (id) { 233 case PCI20006_ID: 234 sdp->pci20006.iobase = 235 devpriv->ioaddr + (i + 1) * PCI20000_OFFSET; 236 pci20006_init(dev, s, it->options[2 * i + 2], 237 it->options[2 * i + 3]); 238 printk("comedi%d: ii_pci20kc", dev->minor); 239 printk(" PCI-20006 module in slot %d \n", i + 1); 240 break; 241 case PCI20341_ID: 242 sdp->pci20341.iobase = 243 devpriv->ioaddr + (i + 1) * PCI20000_OFFSET; 244 pci20341_init(dev, s, it->options[2 * i + 2], 245 it->options[2 * i + 3]); 246 printk("comedi%d: ii_pci20kc", dev->minor); 247 printk(" PCI-20341 module in slot %d \n", i + 1); 248 break; 249 default: 250 printk("ii_pci20kc: unknown module code 0x%02x in slot %d: module disabled\n", id, i); 251 /* fall through */ 252 case PCI20xxx_EMPTY_ID: 253 s->type = COMEDI_SUBD_UNUSED; 254 break; 255 } 256 } 257 258 /* initialize pci20xxx_private */ 259 pci20xxx_dio_init(dev, dev->subdevices + PCI20000_MODULES); 260 261 return 1; 262} 263 264static int pci20xxx_detach(struct comedi_device * dev) 265{ 266 printk("comedi%d: pci20xxx: remove\n", dev->minor); 267 268 return 0; 269} 270 271/* pci20006m */ 272 273static int pci20006_insn_read(struct comedi_device * dev, struct comedi_subdevice * s, 274 struct comedi_insn * insn, unsigned int * data); 275static int pci20006_insn_write(struct comedi_device * dev, struct comedi_subdevice * s, 276 struct comedi_insn * insn, unsigned int * data); 277 278static const struct comedi_lrange *pci20006_range_list[] = { 279 &range_bipolar10, 280 &range_unipolar10, 281 &range_bipolar5, 282}; 283 284static int pci20006_init(struct comedi_device * dev, struct comedi_subdevice * s, 285 int opt0, int opt1) 286{ 287 pci20xxx_subdev_private *sdp = s->private; 288 289 if (opt0 < 0 || opt0 > 2) 290 opt0 = 0; 291 if (opt1 < 0 || opt1 > 2) 292 opt1 = 0; 293 294 sdp->pci20006.ao_range_list[0] = pci20006_range_list[opt0]; 295 sdp->pci20006.ao_range_list[1] = pci20006_range_list[opt1]; 296 297 /* ao subdevice */ 298 s->type = COMEDI_SUBD_AO; 299 s->subdev_flags = SDF_WRITABLE; 300 s->n_chan = 2; 301 s->len_chanlist = 2; 302 s->insn_read = pci20006_insn_read; 303 s->insn_write = pci20006_insn_write; 304 s->maxdata = 0xffff; 305 s->range_table_list = sdp->pci20006.ao_range_list; 306 return 0; 307} 308 309static int pci20006_insn_read(struct comedi_device * dev, struct comedi_subdevice * s, 310 struct comedi_insn * insn, unsigned int * data) 311{ 312 pci20xxx_subdev_private *sdp = s->private; 313 314 data[0] = sdp->pci20006.last_data[CR_CHAN(insn->chanspec)]; 315 316 return 1; 317} 318 319static int pci20006_insn_write(struct comedi_device * dev, struct comedi_subdevice * s, 320 struct comedi_insn * insn, unsigned int * data) 321{ 322 pci20xxx_subdev_private *sdp = s->private; 323 int hi, lo; 324 unsigned int boarddata; 325 326 sdp->pci20006.last_data[CR_CHAN(insn->chanspec)] = data[0]; 327 boarddata = (((unsigned int)data[0] + 0x8000) & 0xffff); /* comedi-data -> board-data */ 328 lo = (boarddata & 0xff); 329 hi = ((boarddata >> 8) & 0xff); 330 331 switch (CR_CHAN(insn->chanspec)) { 332 case 0: 333 writeb(lo, sdp->iobase + PCI20006_LCHAN0); 334 writeb(hi, sdp->iobase + PCI20006_LCHAN0 + 1); 335 writeb(0x00, sdp->iobase + PCI20006_STROBE0); 336 break; 337 case 1: 338 writeb(lo, sdp->iobase + PCI20006_LCHAN1); 339 writeb(hi, sdp->iobase + PCI20006_LCHAN1 + 1); 340 writeb(0x00, sdp->iobase + PCI20006_STROBE1); 341 break; 342 default: 343 printk(" comedi%d: pci20xxx: ao channel Error!\n", dev->minor); 344 return -EINVAL; 345 } 346 347 return 1; 348} 349 350/* PCI20341M */ 351 352static int pci20341_insn_read(struct comedi_device * dev, struct comedi_subdevice * s, 353 struct comedi_insn * insn, unsigned int * data); 354 355static const int pci20341_timebase[] = { 0x00, 0x00, 0x00, 0x04 }; 356static const int pci20341_settling_time[] = { 0x58, 0x58, 0x93, 0x99 }; 357 358static const struct comedi_lrange range_bipolar0_5 = { 1, {BIP_RANGE(0.5)} }; 359static const struct comedi_lrange range_bipolar0_05 = { 1, {BIP_RANGE(0.05)} }; 360static const struct comedi_lrange range_bipolar0_025 = { 1, {BIP_RANGE(0.025)} }; 361 362static const struct comedi_lrange *const pci20341_ranges[] = { 363 &range_bipolar5, 364 &range_bipolar0_5, 365 &range_bipolar0_05, 366 &range_bipolar0_025, 367}; 368 369static int pci20341_init(struct comedi_device * dev, struct comedi_subdevice * s, 370 int opt0, int opt1) 371{ 372 pci20xxx_subdev_private *sdp = s->private; 373 int option; 374 375 /* options handling */ 376 if (opt0 < 0 || opt0 > 3) 377 opt0 = 0; 378 sdp->pci20341.timebase = pci20341_timebase[opt0]; 379 sdp->pci20341.settling_time = pci20341_settling_time[opt0]; 380 381 /* ai subdevice */ 382 s->type = COMEDI_SUBD_AI; 383 s->subdev_flags = SDF_READABLE; 384 s->n_chan = PCI20341_CHAN_NR; 385 s->len_chanlist = PCI20341_SCANLIST; 386 s->insn_read = pci20341_insn_read; 387 s->maxdata = 0xffff; 388 s->range_table = pci20341_ranges[opt0]; 389 390 option = sdp->pci20341.timebase | PCI20341_REPMODE; /* depends on gain, trigger, repetition mode */ 391 392 writeb(PCI20341_INIT, sdp->iobase + PCI20341_CONFIG_REG); /* initialize Module */ 393 writeb(PCI20341_PACER, sdp->iobase + PCI20341_MOD_STATUS); /* set Pacer */ 394 writeb(option, sdp->iobase + PCI20341_OPT_REG); /* option register */ 395 writeb(sdp->pci20341.settling_time, sdp->iobase + PCI20341_SET_TIME_REG); /* settling time counter */ 396 /* trigger not implemented */ 397 return 0; 398} 399 400static int pci20341_insn_read(struct comedi_device * dev, struct comedi_subdevice * s, 401 struct comedi_insn * insn, unsigned int * data) 402{ 403 pci20xxx_subdev_private *sdp = s->private; 404 unsigned int i = 0, j = 0; 405 int lo, hi; 406 unsigned char eoc; /* end of conversion */ 407 unsigned int clb; /* channel list byte */ 408 unsigned int boarddata; 409 410 writeb(1, sdp->iobase + PCI20341_LCHAN_ADDR_REG); /* write number of input channels */ 411 clb = PCI20341_DAISY_CHAIN | PCI20341_MUX | (sdp->pci20341.ai_gain << 3) 412 | CR_CHAN(insn->chanspec); 413 writeb(clb, sdp->iobase + PCI20341_CHAN_LIST); 414 writeb(0x00, sdp->iobase + PCI20341_CC_RESET); /* reset settling time counter and trigger delay counter */ 415 writeb(0x00, sdp->iobase + PCI20341_CHAN_RESET); 416 417 /* generate Pacer */ 418 419 for (i = 0; i < insn->n; i++) { 420 /* data polling isn't the niciest way to get the data, I know, 421 * but there are only 6 cycles (mean) and it is easier than 422 * the whole interrupt stuff 423 */ 424 j = 0; 425 readb(sdp->iobase + PCI20341_SOFT_PACER); /* generate Pacer */ 426 eoc = readb(sdp->iobase + PCI20341_STATUS_REG); 427 while ((eoc < 0x80) && j < 100) { /* poll Interrupt Flag */ 428 j++; 429 eoc = readb(sdp->iobase + PCI20341_STATUS_REG); 430 } 431 if (j >= 100) { 432 printk("comedi%d: pci20xxx: AI interrupt channel %i polling exit !\n", dev->minor, i); 433 return -EINVAL; 434 } 435 lo = readb(sdp->iobase + PCI20341_LDATA); 436 hi = readb(sdp->iobase + PCI20341_LDATA + 1); 437 boarddata = lo + 0x100 * hi; 438 data[i] = (short) ((boarddata + 0x8000) & 0xffff); /* board-data -> comedi-data */ 439 } 440 441 return i; 442} 443 444/* native DIO */ 445 446static void pci20xxx_dio_config(struct comedi_device * dev, struct comedi_subdevice * s); 447static int pci20xxx_dio_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s, 448 struct comedi_insn * insn, unsigned int * data); 449static int pci20xxx_dio_insn_config(struct comedi_device * dev, struct comedi_subdevice * s, 450 struct comedi_insn * insn, unsigned int * data); 451 452/* initialize pci20xxx_private */ 453static int pci20xxx_dio_init(struct comedi_device * dev, struct comedi_subdevice * s) 454{ 455 456 s->type = COMEDI_SUBD_DIO; 457 s->subdev_flags = SDF_READABLE | SDF_WRITABLE; 458 s->n_chan = 32; 459 s->insn_bits = pci20xxx_dio_insn_bits; 460 s->insn_config = pci20xxx_dio_insn_config; 461 s->maxdata = 1; 462 s->len_chanlist = 32; 463 s->range_table = &range_digital; 464 s->io_bits = 0; 465 466 /* digital I/O lines default to input on board reset. */ 467 pci20xxx_dio_config(dev, s); 468 469 return 0; 470} 471 472static int pci20xxx_dio_insn_config(struct comedi_device * dev, struct comedi_subdevice * s, 473 struct comedi_insn * insn, unsigned int * data) 474{ 475 int mask, bits; 476 477 mask = 1 << CR_CHAN(insn->chanspec); 478 if (mask & 0x000000ff) { 479 bits = 0x000000ff; 480 } else if (mask & 0x0000ff00) { 481 bits = 0x0000ff00; 482 } else if (mask & 0x00ff0000) { 483 bits = 0x00ff0000; 484 } else { 485 bits = 0xff000000; 486 } 487 if (data[0]) { 488 s->io_bits |= bits; 489 } else { 490 s->io_bits &= ~bits; 491 } 492 pci20xxx_dio_config(dev, s); 493 494 return 1; 495} 496 497static int pci20xxx_dio_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s, 498 struct comedi_insn * insn, unsigned int * data) 499{ 500 unsigned int mask = data[0]; 501 502 s->state &= ~mask; 503 s->state |= (mask & data[1]); 504 505 mask &= s->io_bits; 506 if (mask & 0x000000ff) 507 writeb((s->state >> 0) & 0xff, 508 devpriv->ioaddr + PCI20000_DIO_0); 509 if (mask & 0x0000ff00) 510 writeb((s->state >> 8) & 0xff, 511 devpriv->ioaddr + PCI20000_DIO_1); 512 if (mask & 0x00ff0000) 513 writeb((s->state >> 16) & 0xff, 514 devpriv->ioaddr + PCI20000_DIO_2); 515 if (mask & 0xff000000) 516 writeb((s->state >> 24) & 0xff, 517 devpriv->ioaddr + PCI20000_DIO_3); 518 519 data[1] = readb(devpriv->ioaddr + PCI20000_DIO_0); 520 data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8; 521 data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16; 522 data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24; 523 524 return 2; 525} 526 527static void pci20xxx_dio_config(struct comedi_device * dev, struct comedi_subdevice * s) 528{ 529 unsigned char control_01; 530 unsigned char control_23; 531 unsigned char buffer; 532 533 control_01 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_01); 534 control_23 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_23); 535 buffer = readb(devpriv->ioaddr + PCI20000_DIO_BUFFER); 536 537 if (s->io_bits & 0x000000ff) { 538 /* output port 0 */ 539 control_01 &= PCI20000_DIO_EOC; 540 buffer = (buffer & (~(DIO_BE << DIO_PS_0))) | (DIO_BO << 541 DIO_PS_0); 542 } else { 543 /* input port 0 */ 544 control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_EIC; 545 buffer = (buffer & (~(DIO_BI << DIO_PS_0))); 546 } 547 if (s->io_bits & 0x0000ff00) { 548 /* output port 1 */ 549 control_01 &= PCI20000_DIO_OOC; 550 buffer = (buffer & (~(DIO_BE << DIO_PS_1))) | (DIO_BO << 551 DIO_PS_1); 552 } else { 553 /* input port 1 */ 554 control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_OIC; 555 buffer = (buffer & (~(DIO_BI << DIO_PS_1))); 556 } 557 if (s->io_bits & 0x00ff0000) { 558 /* output port 2 */ 559 control_23 &= PCI20000_DIO_EOC; 560 buffer = (buffer & (~(DIO_BE << DIO_PS_2))) | (DIO_BO << 561 DIO_PS_2); 562 } else { 563 /* input port 2 */ 564 control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_EIC; 565 buffer = (buffer & (~(DIO_BI << DIO_PS_2))); 566 } 567 if (s->io_bits & 0xff000000) { 568 /* output port 3 */ 569 control_23 &= PCI20000_DIO_OOC; 570 buffer = (buffer & (~(DIO_BE << DIO_PS_3))) | (DIO_BO << 571 DIO_PS_3); 572 } else { 573 /* input port 3 */ 574 control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_OIC; 575 buffer = (buffer & (~(DIO_BI << DIO_PS_3))); 576 } 577 writeb(control_01, devpriv->ioaddr + PCI20000_DIO_CONTROL_01); 578 writeb(control_23, devpriv->ioaddr + PCI20000_DIO_CONTROL_23); 579 writeb(buffer, devpriv->ioaddr + PCI20000_DIO_BUFFER); 580} 581 582#if 0 583static void pci20xxx_do(struct comedi_device * dev, struct comedi_subdevice * s) 584{ 585 /* XXX if the channel is configured for input, does this 586 do bad things? */ 587 /* XXX it would be a good idea to only update the registers 588 that _need_ to be updated. This requires changes to 589 comedi, however. */ 590 writeb((s->state >> 0) & 0xff, devpriv->ioaddr + PCI20000_DIO_0); 591 writeb((s->state >> 8) & 0xff, devpriv->ioaddr + PCI20000_DIO_1); 592 writeb((s->state >> 16) & 0xff, devpriv->ioaddr + PCI20000_DIO_2); 593 writeb((s->state >> 24) & 0xff, devpriv->ioaddr + PCI20000_DIO_3); 594} 595 596static unsigned int pci20xxx_di(struct comedi_device * dev, struct comedi_subdevice * s) 597{ 598 /* XXX same note as above */ 599 unsigned int bits; 600 601 bits = readb(devpriv->ioaddr + PCI20000_DIO_0); 602 bits |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8; 603 bits |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16; 604 bits |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24; 605 606 return bits; 607} 608#endif 609 610COMEDI_INITCLEANUP(driver_pci20xxx); 611