kernel/drivers/staging/comedi/drivers/daqboard2000.c

   1 /*
   2  * comedi/drivers/daqboard2000.c
   3  * hardware driver for IOtech DAQboard/2000
   4  *
   5  * COMEDI - Linux Control and Measurement Device Interface
   6  * Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18 /*
  19  * Driver: daqboard2000
  20  * Description: IOTech DAQBoard/2000
  21  * Author: Anders Blomdell <anders.blomdell@control.lth.se>
  22  * Status: works
  23  * Updated: Mon, 14 Apr 2008 15:28:52 +0100
  24  * Devices: [IOTech] DAQBoard/2000 (daqboard2000)
  25  *
  26  * Much of the functionality of this driver was determined from reading
  27  * the source code for the Windows driver.
  28  *
  29  * The FPGA on the board requires fimware, which is available from
  30  * http://www.comedi.org in the comedi_nonfree_firmware tarball.
  31  *
  32  * Configuration options: not applicable, uses PCI auto config
  33  */
  34 /*
  35  * This card was obviously never intended to leave the Windows world,
  36  * since it lacked all kind of hardware documentation (except for cable
  37  * pinouts, plug and pray has something to catch up with yet).
  38  *
  39  * With some help from our swedish distributor, we got the Windows sourcecode
  40  * for the card, and here are the findings so far.
  41  *
  42  * 1. A good document that describes the PCI interface chip is 9080db-106.pdf
  43  *    available from http://www.plxtech.com/products/io/pci9080
  44  *
  45  * 2. The initialization done so far is:
  46  *      a. program the FPGA (windows code sans a lot of error messages)
  47  *      b.
  48  *
  49  * 3. Analog out seems to work OK with DAC's disabled, if DAC's are enabled,
  50  *    you have to output values to all enabled DAC's until result appears, I
  51  *    guess that it has something to do with pacer clocks, but the source
  52  *    gives me no clues. I'll keep it simple so far.
  53  *
  54  * 4. Analog in.
  55  *    Each channel in the scanlist seems to be controlled by four
  56  *    control words:
  57  *
  58  *      Word0:
  59  *        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  60  *        ! | | | ! | | | ! | | | ! | | | !
  61  *        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  62  *
  63  *      Word1:
  64  *        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  65  *        ! | | | ! | | | ! | | | ! | | | !
  66  *        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  67  *         |             |       | | | | |
  68  *         +------+------+       | | | | +-- Digital input (??)
  69  *                |              | | | +---- 10 us settling time
  70  *                |              | | +------ Suspend acquisition (last to scan)
  71  *                |              | +-------- Simultaneous sample and hold
  72  *                |              +---------- Signed data format
  73  *                +------------------------- Correction offset low
  74  *
  75  *      Word2:
  76  *        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  77  *        ! | | | ! | | | ! | | | ! | | | !
  78  *        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  79  *         |     | |     | | | | | |     |
  80  *         +-----+ +--+--+ +++ +++ +--+--+
  81  *            |       |     |   |     +----- Expansion channel
  82  *            |       |     |   +----------- Expansion gain
  83  *            |       |     +--------------- Channel (low)
  84  *            |       +--------------------- Correction offset high
  85  *            +----------------------------- Correction gain low
  86  *      Word3:
  87  *        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  88  *        ! | | | ! | | | ! | | | ! | | | !
  89  *        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  90  *         |             | | | |   | | | |
  91  *         +------+------+ | | +-+-+ | | +-- Low bank enable
  92  *                |        | |   |   | +---- High bank enable
  93  *                |        | |   |   +------ Hi/low select
  94  *                |        | |   +---------- Gain (1,?,2,4,8,16,32,64)
  95  *                |        | +-------------- differential/single ended
  96  *                |        +---------------- Unipolar
  97  *                +------------------------- Correction gain high
  98  *
  99  * 999. The card seems to have an incredible amount of capabilities, but
 100  *      trying to reverse engineer them from the Windows source is beyond my
 101  *      patience.
 102  *
 103  */
 104
 105 #include <linux/module.h>
 106 #include <linux/delay.h>
 107 #include <linux/interrupt.h>
 108
 109 #include "../comedi_pci.h"
 110
 111 #include "8255.h"
 112
 113 #define DAQBOARD2000_FIRMWARE           "daqboard2000_firmware.bin"
 114
 115 #define DAQBOARD2000_SUBSYSTEM_IDS2     0x0002  /* Daqboard/2000 - 2 Dacs */
 116 #define DAQBOARD2000_SUBSYSTEM_IDS4     0x0004  /* Daqboard/2000 - 4 Dacs */
 117
 118 /* Initialization bits for the Serial EEPROM Control Register */
 119 #define DAQBOARD2000_SECRProgPinHi      0x8001767e
 120 #define DAQBOARD2000_SECRProgPinLo      0x8000767e
 121 #define DAQBOARD2000_SECRLocalBusHi     0xc000767e
 122 #define DAQBOARD2000_SECRLocalBusLo     0x8000767e
 123 #define DAQBOARD2000_SECRReloadHi       0xa000767e
 124 #define DAQBOARD2000_SECRReloadLo       0x8000767e
 125
 126 /* SECR status bits */
 127 #define DAQBOARD2000_EEPROM_PRESENT     0x10000000
 128
 129 /* CPLD status bits */
 130 #define DAQBOARD2000_CPLD_INIT          0x0002
 131 #define DAQBOARD2000_CPLD_DONE          0x0004
 132
 133 static const struct comedi_lrange range_daqboard2000_ai = {
 134         13, {
 135                 BIP_RANGE(10),
 136                 BIP_RANGE(5),
 137                 BIP_RANGE(2.5),
 138                 BIP_RANGE(1.25),
 139                 BIP_RANGE(0.625),
 140                 BIP_RANGE(0.3125),
 141                 BIP_RANGE(0.156),
 142                 UNI_RANGE(10),
 143                 UNI_RANGE(5),
 144                 UNI_RANGE(2.5),
 145                 UNI_RANGE(1.25),
 146                 UNI_RANGE(0.625),
 147                 UNI_RANGE(0.3125)
 148         }
 149 };
 150
 151 /*
 152  * Register Memory Map
 153  */
 154 #define acqControl                      0x00            /* u16 */
 155 #define acqScanListFIFO                 0x02            /* u16 */
 156 #define acqPacerClockDivLow             0x04            /* u32 */
 157 #define acqScanCounter                  0x08            /* u16 */
 158 #define acqPacerClockDivHigh            0x0a            /* u16 */
 159 #define acqTriggerCount                 0x0c            /* u16 */
 160 #define acqResultsFIFO                  0x10            /* u16 */
 161 #define acqResultsShadow                0x14            /* u16 */
 162 #define acqAdcResult                    0x18            /* u16 */
 163 #define dacScanCounter                  0x1c            /* u16 */
 164 #define dacControl                      0x20            /* u16 */
 165 #define dacFIFO                         0x24            /* s16 */
 166 #define dacPacerClockDiv                0x2a            /* u16 */
 167 #define refDacs                         0x2c            /* u16 */
 168 #define dioControl                      0x30            /* u16 */
 169 #define dioP3hsioData                   0x32            /* s16 */
 170 #define dioP3Control                    0x34            /* u16 */
 171 #define calEepromControl                0x36            /* u16 */
 172 #define dacSetting(x)                   (0x38 + (x)*2)  /* s16 */
 173 #define dioP2ExpansionIO8Bit            0x40            /* s16 */
 174 #define ctrTmrControl                   0x80            /* u16 */
 175 #define ctrInput(x)                     (0x88 + (x)*2)  /* s16 */
 176 #define timerDivisor(x)                 (0xa0 + (x)*2)  /* u16 */
 177 #define dmaControl                      0xb0            /* u16 */
 178 #define trigControl                     0xb2            /* u16 */
 179 #define calEeprom                       0xb8            /* u16 */
 180 #define acqDigitalMark                  0xba            /* u16 */
 181 #define trigDacs                        0xbc            /* u16 */
 182 #define dioP2ExpansionIO16Bit(x)        (0xc0 + (x)*2)  /* s16 */
 183
 184 /* Scan Sequencer programming */
 185 #define DAQBOARD2000_SeqStartScanList            0x0011
 186 #define DAQBOARD2000_SeqStopScanList             0x0010
 187
 188 /* Prepare for acquisition */
 189 #define DAQBOARD2000_AcqResetScanListFifo        0x0004
 190 #define DAQBOARD2000_AcqResetResultsFifo         0x0002
 191 #define DAQBOARD2000_AcqResetConfigPipe          0x0001
 192
 193 /* Acqusition status bits */
 194 #define DAQBOARD2000_AcqResultsFIFOMore1Sample   0x0001
 195 #define DAQBOARD2000_AcqResultsFIFOHasValidData  0x0002
 196 #define DAQBOARD2000_AcqResultsFIFOOverrun       0x0004
 197 #define DAQBOARD2000_AcqLogicScanning            0x0008
 198 #define DAQBOARD2000_AcqConfigPipeFull           0x0010
 199 #define DAQBOARD2000_AcqScanListFIFOEmpty        0x0020
 200 #define DAQBOARD2000_AcqAdcNotReady              0x0040
 201 #define DAQBOARD2000_ArbitrationFailure          0x0080
 202 #define DAQBOARD2000_AcqPacerOverrun             0x0100
 203 #define DAQBOARD2000_DacPacerOverrun             0x0200
 204 #define DAQBOARD2000_AcqHardwareError            0x01c0
 205
 206 /* Scan Sequencer programming */
 207 #define DAQBOARD2000_SeqStartScanList            0x0011
 208 #define DAQBOARD2000_SeqStopScanList             0x0010
 209
 210 /* Pacer Clock Control */
 211 #define DAQBOARD2000_AdcPacerInternal            0x0030
 212 #define DAQBOARD2000_AdcPacerExternal            0x0032
 213 #define DAQBOARD2000_AdcPacerEnable              0x0031
 214 #define DAQBOARD2000_AdcPacerEnableDacPacer      0x0034
 215 #define DAQBOARD2000_AdcPacerDisable             0x0030
 216 #define DAQBOARD2000_AdcPacerNormalMode          0x0060
 217 #define DAQBOARD2000_AdcPacerCompatibilityMode   0x0061
 218 #define DAQBOARD2000_AdcPacerInternalOutEnable   0x0008
 219 #define DAQBOARD2000_AdcPacerExternalRising      0x0100
 220
 221 /* DAC status */
 222 #define DAQBOARD2000_DacFull                     0x0001
 223 #define DAQBOARD2000_RefBusy                     0x0002
 224 #define DAQBOARD2000_TrgBusy                     0x0004
 225 #define DAQBOARD2000_CalBusy                     0x0008
 226 #define DAQBOARD2000_Dac0Busy                    0x0010
 227 #define DAQBOARD2000_Dac1Busy                    0x0020
 228 #define DAQBOARD2000_Dac2Busy                    0x0040
 229 #define DAQBOARD2000_Dac3Busy                    0x0080
 230
 231 /* DAC control */
 232 #define DAQBOARD2000_Dac0Enable                  0x0021
 233 #define DAQBOARD2000_Dac1Enable                  0x0031
 234 #define DAQBOARD2000_Dac2Enable                  0x0041
 235 #define DAQBOARD2000_Dac3Enable                  0x0051
 236 #define DAQBOARD2000_DacEnableBit                0x0001
 237 #define DAQBOARD2000_Dac0Disable                 0x0020
 238 #define DAQBOARD2000_Dac1Disable                 0x0030
 239 #define DAQBOARD2000_Dac2Disable                 0x0040
 240 #define DAQBOARD2000_Dac3Disable                 0x0050
 241 #define DAQBOARD2000_DacResetFifo                0x0004
 242 #define DAQBOARD2000_DacPatternDisable           0x0060
 243 #define DAQBOARD2000_DacPatternEnable            0x0061
 244 #define DAQBOARD2000_DacSelectSignedData         0x0002
 245 #define DAQBOARD2000_DacSelectUnsignedData       0x0000
 246
 247 /* Trigger Control */
 248 #define DAQBOARD2000_TrigAnalog                  0x0000
 249 #define DAQBOARD2000_TrigTTL                     0x0010
 250 #define DAQBOARD2000_TrigTransHiLo               0x0004
 251 #define DAQBOARD2000_TrigTransLoHi               0x0000
 252 #define DAQBOARD2000_TrigAbove                   0x0000
 253 #define DAQBOARD2000_TrigBelow                   0x0004
 254 #define DAQBOARD2000_TrigLevelSense              0x0002
 255 #define DAQBOARD2000_TrigEdgeSense               0x0000
 256 #define DAQBOARD2000_TrigEnable                  0x0001
 257 #define DAQBOARD2000_TrigDisable                 0x0000
 258
 259 /* Reference Dac Selection */
 260 #define DAQBOARD2000_PosRefDacSelect             0x0100
 261 #define DAQBOARD2000_NegRefDacSelect             0x0000
 262
 263 struct daq200_boardtype {
 264         const char *name;
 265         int id;
 266 };
 267 static const struct daq200_boardtype boardtypes[] = {
 268         {"ids2", DAQBOARD2000_SUBSYSTEM_IDS2},
 269         {"ids4", DAQBOARD2000_SUBSYSTEM_IDS4},
 270 };
 271
 272 struct daqboard2000_private {
 273         enum {
 274                 card_daqboard_2000
 275         } card;
 276         void __iomem *plx;
 277 };
 278
 279 static void writeAcqScanListEntry(struct comedi_device *dev, u16 entry)
 280 {
 281         /* udelay(4); */
 282         writew(entry & 0x00ff, dev->mmio + acqScanListFIFO);
 283         /* udelay(4); */
 284         writew((entry >> 8) & 0x00ff, dev->mmio + acqScanListFIFO);
 285 }
 286
 287 static void setup_sampling(struct comedi_device *dev, int chan, int gain)
 288 {
 289         u16 word0, word1, word2, word3;
 290
 291         /* Channel 0-7 diff, channel 8-23 single ended */
 292         word0 = 0;
 293         word1 = 0x0004;         /* Last scan */
 294         word2 = (chan << 6) & 0x00c0;
 295         switch (chan / 4) {
 296         case 0:
 297                 word3 = 0x0001;
 298                 break;
 299         case 1:
 300                 word3 = 0x0002;
 301                 break;
 302         case 2:
 303                 word3 = 0x0005;
 304                 break;
 305         case 3:
 306                 word3 = 0x0006;
 307                 break;
 308         case 4:
 309                 word3 = 0x0041;
 310                 break;
 311         case 5:
 312                 word3 = 0x0042;
 313                 break;
 314         default:
 315                 word3 = 0;
 316                 break;
 317         }
 318 /*
 319   dev->eeprom.correctionDACSE[i][j][k].offset = 0x800;
 320   dev->eeprom.correctionDACSE[i][j][k].gain = 0xc00;
 321 */
 322         /* These should be read from EEPROM */
 323         word2 |= 0x0800;
 324         word3 |= 0xc000;
 325         writeAcqScanListEntry(dev, word0);
 326         writeAcqScanListEntry(dev, word1);
 327         writeAcqScanListEntry(dev, word2);
 328         writeAcqScanListEntry(dev, word3);
 329 }
 330
 331 static int daqboard2000_ai_status(struct comedi_device *dev,
 332                                   struct comedi_subdevice *s,
 333                                   struct comedi_insn *insn,
 334                                   unsigned long context)
 335 {
 336         unsigned int status;
 337
 338         status = readw(dev->mmio + acqControl);
 339         if (status & context)
 340                 return 0;
 341         return -EBUSY;
 342 }
 343
 344 static int daqboard2000_ai_insn_read(struct comedi_device *dev,
 345                                      struct comedi_subdevice *s,
 346                                      struct comedi_insn *insn,
 347                                      unsigned int *data)
 348 {
 349         int gain, chan;
 350         int ret;
 351         int i;
 352
 353         writew(DAQBOARD2000_AcqResetScanListFifo |
 354                DAQBOARD2000_AcqResetResultsFifo |
 355                DAQBOARD2000_AcqResetConfigPipe, dev->mmio + acqControl);
 356
 357         /*
 358          * If pacer clock is not set to some high value (> 10 us), we
 359          * risk multiple samples to be put into the result FIFO.
 360          */
 361         /* 1 second, should be long enough */
 362         writel(1000000, dev->mmio + acqPacerClockDivLow);
 363         writew(0, dev->mmio + acqPacerClockDivHigh);
 364
 365         gain = CR_RANGE(insn->chanspec);
 366         chan = CR_CHAN(insn->chanspec);
 367
 368         /* This doesn't look efficient.  I decided to take the conservative
 369          * approach when I did the insn conversion.  Perhaps it would be
 370          * better to have broken it completely, then someone would have been
 371          * forced to fix it.  --ds */
 372         for (i = 0; i < insn->n; i++) {
 373                 setup_sampling(dev, chan, gain);
 374                 /* Enable reading from the scanlist FIFO */
 375                 writew(DAQBOARD2000_SeqStartScanList, dev->mmio + acqControl);
 376
 377                 ret = comedi_timeout(dev, s, insn, daqboard2000_ai_status,
 378                                      DAQBOARD2000_AcqConfigPipeFull);
 379                 if (ret)
 380                         return ret;
 381
 382                 writew(DAQBOARD2000_AdcPacerEnable, dev->mmio + acqControl);
 383
 384                 ret = comedi_timeout(dev, s, insn, daqboard2000_ai_status,
 385                                      DAQBOARD2000_AcqLogicScanning);
 386                 if (ret)
 387                         return ret;
 388
 389                 ret = comedi_timeout(dev, s, insn, daqboard2000_ai_status,
 390                                      DAQBOARD2000_AcqResultsFIFOHasValidData);
 391                 if (ret)
 392                         return ret;
 393
 394                 data[i] = readw(dev->mmio + acqResultsFIFO);
 395                 writew(DAQBOARD2000_AdcPacerDisable, dev->mmio + acqControl);
 396                 writew(DAQBOARD2000_SeqStopScanList, dev->mmio + acqControl);
 397         }
 398
 399         return i;
 400 }
 401
 402 static int daqboard2000_ao_eoc(struct comedi_device *dev,
 403                                struct comedi_subdevice *s,
 404                                struct comedi_insn *insn,
 405                                unsigned long context)
 406 {
 407         unsigned int chan = CR_CHAN(insn->chanspec);
 408         unsigned int status;
 409
 410         status = readw(dev->mmio + dacControl);
 411         if ((status & ((chan + 1) * 0x0010)) == 0)
 412                 return 0;
 413         return -EBUSY;
 414 }
 415
 416 static int daqboard2000_ao_insn_write(struct comedi_device *dev,
 417                                       struct comedi_subdevice *s,
 418                                       struct comedi_insn *insn,
 419                                       unsigned int *data)
 420 {
 421         unsigned int chan = CR_CHAN(insn->chanspec);
 422         int i;
 423
 424         for (i = 0; i < insn->n; i++) {
 425                 unsigned int val = data[i];
 426                 int ret;
 427
 428                 writew(val, dev->mmio + dacSetting(chan));
 429
 430                 ret = comedi_timeout(dev, s, insn, daqboard2000_ao_eoc, 0);
 431                 if (ret)
 432                         return ret;
 433
 434                 s->readback[chan] = val;
 435         }
 436
 437         return insn->n;
 438 }
 439
 440 static void daqboard2000_resetLocalBus(struct comedi_device *dev)
 441 {
 442         struct daqboard2000_private *devpriv = dev->private;
 443
 444         writel(DAQBOARD2000_SECRLocalBusHi, devpriv->plx + 0x6c);
 445         mdelay(10);
 446         writel(DAQBOARD2000_SECRLocalBusLo, devpriv->plx + 0x6c);
 447         mdelay(10);
 448 }
 449
 450 static void daqboard2000_reloadPLX(struct comedi_device *dev)
 451 {
 452         struct daqboard2000_private *devpriv = dev->private;
 453
 454         writel(DAQBOARD2000_SECRReloadLo, devpriv->plx + 0x6c);
 455         mdelay(10);
 456         writel(DAQBOARD2000_SECRReloadHi, devpriv->plx + 0x6c);
 457         mdelay(10);
 458         writel(DAQBOARD2000_SECRReloadLo, devpriv->plx + 0x6c);
 459         mdelay(10);
 460 }
 461
 462 static void daqboard2000_pulseProgPin(struct comedi_device *dev)
 463 {
 464         struct daqboard2000_private *devpriv = dev->private;
 465
 466         writel(DAQBOARD2000_SECRProgPinHi, devpriv->plx + 0x6c);
 467         mdelay(10);
 468         writel(DAQBOARD2000_SECRProgPinLo, devpriv->plx + 0x6c);
 469         mdelay(10);     /* Not in the original code, but I like symmetry... */
 470 }
 471
 472 static int daqboard2000_pollCPLD(struct comedi_device *dev, int mask)
 473 {
 474         int result = 0;
 475         int i;
 476         int cpld;
 477
 478         /* timeout after 50 tries -> 5ms */
 479         for (i = 0; i < 50; i++) {
 480                 cpld = readw(dev->mmio + 0x1000);
 481                 if ((cpld & mask) == mask) {
 482                         result = 1;
 483                         break;
 484                 }
 485                 udelay(100);
 486         }
 487         udelay(5);
 488         return result;
 489 }
 490
 491 static int daqboard2000_writeCPLD(struct comedi_device *dev, int data)
 492 {
 493         int result = 0;
 494
 495         udelay(10);
 496         writew(data, dev->mmio + 0x1000);
 497         if ((readw(dev->mmio + 0x1000) & DAQBOARD2000_CPLD_INIT) ==
 498             DAQBOARD2000_CPLD_INIT) {
 499                 result = 1;
 500         }
 501         return result;
 502 }
 503
 504 static int initialize_daqboard2000(struct comedi_device *dev,
 505                                    const u8 *cpld_array, size_t len,
 506                                    unsigned long context)
 507 {
 508         struct daqboard2000_private *devpriv = dev->private;
 509         int result = -EIO;
 510         /* Read the serial EEPROM control register */
 511         int secr;
 512         int retry;
 513         size_t i;
 514
 515         /* Check to make sure the serial eeprom is present on the board */
 516         secr = readl(devpriv->plx + 0x6c);
 517         if (!(secr & DAQBOARD2000_EEPROM_PRESENT))
 518                 return -EIO;
 519
 520         for (retry = 0; retry < 3; retry++) {
 521                 daqboard2000_resetLocalBus(dev);
 522                 daqboard2000_reloadPLX(dev);
 523                 daqboard2000_pulseProgPin(dev);
 524                 if (daqboard2000_pollCPLD(dev, DAQBOARD2000_CPLD_INIT)) {
 525                         for (i = 0; i < len; i++) {
 526                                 if (cpld_array[i] == 0xff &&
 527                                     cpld_array[i + 1] == 0x20)
 528                                         break;
 529                         }
 530                         for (; i < len; i += 2) {
 531                                 int data =
 532                                     (cpld_array[i] << 8) + cpld_array[i + 1];
 533                                 if (!daqboard2000_writeCPLD(dev, data))
 534                                         break;
 535                         }
 536                         if (i >= len) {
 537                                 daqboard2000_resetLocalBus(dev);
 538                                 daqboard2000_reloadPLX(dev);
 539                                 result = 0;
 540                                 break;
 541                         }
 542                 }
 543         }
 544         return result;
 545 }
 546
 547 static void daqboard2000_adcStopDmaTransfer(struct comedi_device *dev)
 548 {
 549 }
 550
 551 static void daqboard2000_adcDisarm(struct comedi_device *dev)
 552 {
 553         /* Disable hardware triggers */
 554         udelay(2);
 555         writew(DAQBOARD2000_TrigAnalog | DAQBOARD2000_TrigDisable,
 556                dev->mmio + trigControl);
 557         udelay(2);
 558         writew(DAQBOARD2000_TrigTTL | DAQBOARD2000_TrigDisable,
 559                dev->mmio + trigControl);
 560
 561         /* Stop the scan list FIFO from loading the configuration pipe */
 562         udelay(2);
 563         writew(DAQBOARD2000_SeqStopScanList, dev->mmio + acqControl);
 564
 565         /* Stop the pacer clock */
 566         udelay(2);
 567         writew(DAQBOARD2000_AdcPacerDisable, dev->mmio + acqControl);
 568
 569         /* Stop the input dma (abort channel 1) */
 570         daqboard2000_adcStopDmaTransfer(dev);
 571 }
 572
 573 static void daqboard2000_activateReferenceDacs(struct comedi_device *dev)
 574 {
 575         unsigned int val;
 576         int timeout;
 577
 578         /*  Set the + reference dac value in the FPGA */
 579         writew(0x80 | DAQBOARD2000_PosRefDacSelect, dev->mmio + refDacs);
 580         for (timeout = 0; timeout < 20; timeout++) {
 581                 val = readw(dev->mmio + dacControl);
 582                 if ((val & DAQBOARD2000_RefBusy) == 0)
 583                         break;
 584                 udelay(2);
 585         }
 586
 587         /*  Set the - reference dac value in the FPGA */
 588         writew(0x80 | DAQBOARD2000_NegRefDacSelect, dev->mmio + refDacs);
 589         for (timeout = 0; timeout < 20; timeout++) {
 590                 val = readw(dev->mmio + dacControl);
 591                 if ((val & DAQBOARD2000_RefBusy) == 0)
 592                         break;
 593                 udelay(2);
 594         }
 595 }
 596
 597 static void daqboard2000_initializeCtrs(struct comedi_device *dev)
 598 {
 599 }
 600
 601 static void daqboard2000_initializeTmrs(struct comedi_device *dev)
 602 {
 603 }
 604
 605 static void daqboard2000_dacDisarm(struct comedi_device *dev)
 606 {
 607 }
 608
 609 static void daqboard2000_initializeAdc(struct comedi_device *dev)
 610 {
 611         daqboard2000_adcDisarm(dev);
 612         daqboard2000_activateReferenceDacs(dev);
 613         daqboard2000_initializeCtrs(dev);
 614         daqboard2000_initializeTmrs(dev);
 615 }
 616
 617 static void daqboard2000_initializeDac(struct comedi_device *dev)
 618 {
 619         daqboard2000_dacDisarm(dev);
 620 }
 621
 622 static int daqboard2000_8255_cb(struct comedi_device *dev,
 623                                 int dir, int port, int data,
 624                                 unsigned long iobase)
 625 {
 626         if (dir) {
 627                 writew(data, dev->mmio + iobase + port * 2);
 628                 return 0;
 629         }
 630         return readw(dev->mmio + iobase + port * 2);
 631 }
 632
 633 static const void *daqboard2000_find_boardinfo(struct comedi_device *dev,
 634                                                struct pci_dev *pcidev)
 635 {
 636         const struct daq200_boardtype *board;
 637         int i;
 638
 639         if (pcidev->subsystem_device != PCI_VENDOR_ID_IOTECH)
 640                 return NULL;
 641
 642         for (i = 0; i < ARRAY_SIZE(boardtypes); i++) {
 643                 board = &boardtypes[i];
 644                 if (pcidev->subsystem_device == board->id)
 645                         return board;
 646         }
 647         return NULL;
 648 }
 649
 650 static int daqboard2000_auto_attach(struct comedi_device *dev,
 651                                     unsigned long context_unused)
 652 {
 653         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 654         const struct daq200_boardtype *board;
 655         struct daqboard2000_private *devpriv;
 656         struct comedi_subdevice *s;
 657         int result;
 658
 659         board = daqboard2000_find_boardinfo(dev, pcidev);
 660         if (!board)
 661                 return -ENODEV;
 662         dev->board_ptr = board;
 663         dev->board_name = board->name;
 664
 665         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 666         if (!devpriv)
 667                 return -ENOMEM;
 668
 669         result = comedi_pci_enable(dev);
 670         if (result)
 671                 return result;
 672
 673         devpriv->plx = pci_ioremap_bar(pcidev, 0);
 674         dev->mmio = pci_ioremap_bar(pcidev, 2);
 675         if (!devpriv->plx || !dev->mmio)
 676                 return -ENOMEM;
 677
 678         result = comedi_alloc_subdevices(dev, 3);
 679         if (result)
 680                 return result;
 681
 682         readl(devpriv->plx + 0x6c);
 683
 684         result = comedi_load_firmware(dev, &comedi_to_pci_dev(dev)->dev,
 685                                       DAQBOARD2000_FIRMWARE,
 686                                       initialize_daqboard2000, 0);
 687         if (result < 0)
 688                 return result;
 689
 690         daqboard2000_initializeAdc(dev);
 691         daqboard2000_initializeDac(dev);
 692
 693         s = &dev->subdevices[0];
 694         /* ai subdevice */
 695         s->type = COMEDI_SUBD_AI;
 696         s->subdev_flags = SDF_READABLE | SDF_GROUND;
 697         s->n_chan = 24;
 698         s->maxdata = 0xffff;
 699         s->insn_read = daqboard2000_ai_insn_read;
 700         s->range_table = &range_daqboard2000_ai;
 701
 702         s = &dev->subdevices[1];
 703         /* ao subdevice */
 704         s->type = COMEDI_SUBD_AO;
 705         s->subdev_flags = SDF_WRITABLE;
 706         s->n_chan = 2;
 707         s->maxdata = 0xffff;
 708         s->insn_write = daqboard2000_ao_insn_write;
 709         s->range_table = &range_bipolar10;
 710
 711         result = comedi_alloc_subdev_readback(s);
 712         if (result)
 713                 return result;
 714
 715         s = &dev->subdevices[2];
 716         return subdev_8255_init(dev, s, daqboard2000_8255_cb,
 717                                 dioP2ExpansionIO8Bit);
 718 }
 719
 720 static void daqboard2000_detach(struct comedi_device *dev)
 721 {
 722         struct daqboard2000_private *devpriv = dev->private;
 723
 724         if (devpriv && devpriv->plx)
 725                 iounmap(devpriv->plx);
 726         comedi_pci_detach(dev);
 727 }
 728
 729 static struct comedi_driver daqboard2000_driver = {
 730         .driver_name    = "daqboard2000",
 731         .module         = THIS_MODULE,
 732         .auto_attach    = daqboard2000_auto_attach,
 733         .detach         = daqboard2000_detach,
 734 };
 735
 736 static int daqboard2000_pci_probe(struct pci_dev *dev,
 737                                   const struct pci_device_id *id)
 738 {
 739         return comedi_pci_auto_config(dev, &daqboard2000_driver,
 740                                       id->driver_data);
 741 }
 742
 743 static const struct pci_device_id daqboard2000_pci_table[] = {
 744         { PCI_DEVICE(PCI_VENDOR_ID_IOTECH, 0x0409) },
 745         { 0 }
 746 };
 747 MODULE_DEVICE_TABLE(pci, daqboard2000_pci_table);
 748
 749 static struct pci_driver daqboard2000_pci_driver = {
 750         .name           = "daqboard2000",
 751         .id_table       = daqboard2000_pci_table,
 752         .probe          = daqboard2000_pci_probe,
 753         .remove         = comedi_pci_auto_unconfig,
 754 };
 755 module_comedi_pci_driver(daqboard2000_driver, daqboard2000_pci_driver);
 756
 757 MODULE_AUTHOR("Comedi http://www.comedi.org");
 758 MODULE_DESCRIPTION("Comedi low-level driver");
 759 MODULE_LICENSE("GPL");
 760 MODULE_FIRMWARE(DAQBOARD2000_FIRMWARE);