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 firmware, 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 DB2K_SECR_PROG_PIN_HI           0x8001767e
 120 #define DB2K_SECR_PROG_PIN_LO           0x8000767e
 121 #define DB2K_SECR_LOCAL_BUS_HI          0xc000767e
 122 #define DB2K_SECR_LOCAL_BUS_LO          0x8000767e
 123 #define DB2K_SECR_RELOAD_HI             0xa000767e
 124 #define DB2K_SECR_RELOAD_LO             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 DB2K_REG_ACQ_CONTROL                    0x00            /* u16 */
 155 #define DB2K_REG_ACQ_SCAN_LIST_FIFO             0x02            /* u16 */
 156 #define DB2K_REG_ACQ_PACER_CLOCK_DIV_LOW        0x04            /* u32 */
 157 #define DB2K_REG_ACQ_SCAN_COUNTER               0x08            /* u16 */
 158 #define DB2K_REG_ACQ_PACER_CLOCK_DIV_HIGH       0x0a            /* u16 */
 159 #define DB2K_REG_ACQ_TRIGGER_COUNT              0x0c            /* u16 */
 160 #define DB2K_REG_ACQ_RESULTS_FIFO               0x10            /* u16 */
 161 #define DB2K_REG_ACQ_RESULTS_SHADOW             0x14            /* u16 */
 162 #define DB2K_REG_ACQ_ADC_RESULT                 0x18            /* u16 */
 163 #define DB2K_REG_DAC_SCAN_COUNTER               0x1c            /* u16 */
 164 #define DB2K_REG_DAC_CONTROL                    0x20            /* u16 */
 165 #define DB2K_REG_DAC_FIFO                       0x24            /* s16 */
 166 #define DB2K_REG_DAC_PACER_CLOCK_DIV            0x2a            /* u16 */
 167 #define DB2K_REG_REF_DACS                       0x2c            /* u16 */
 168 #define DB2K_REG_DIO_CONTROL                    0x30            /* u16 */
 169 #define DB2K_REG_P3_HSIO_DATA                   0x32            /* s16 */
 170 #define DB2K_REG_P3_CONTROL                     0x34            /* u16 */
 171 #define DB2K_REG_CAL_EEPROM_CONTROL             0x36            /* u16 */
 172 #define DB2K_REG_DAC_SETTING(x)                 (0x38 + (x) * 2) /* s16 */
 173 #define DB2K_REG_DIO_P2_EXP_IO_8_BIT            0x40            /* s16 */
 174 #define DB2K_REG_COUNTER_TIMER_CONTROL          0x80            /* u16 */
 175 #define DB2K_REG_COUNTER_INPUT(x)               (0x88 + (x) * 2) /* s16 */
 176 #define DB2K_REG_TIMER_DIV(x)                   (0xa0 + (x) * 2) /* u16 */
 177 #define DB2K_REG_DMA_CONTROL                    0xb0            /* u16 */
 178 #define DB2K_REG_TRIG_CONTROL                   0xb2            /* u16 */
 179 #define DB2K_REG_CAL_EEPROM                     0xb8            /* u16 */
 180 #define DB2K_REG_ACQ_DIGITAL_MARK               0xba            /* u16 */
 181 #define DB2K_REG_TRIG_DACS                      0xbc            /* u16 */
 182 #define DB2K_REG_DIO_P2_EXP_IO_16_BIT(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
 268 static const struct daq200_boardtype boardtypes[] = {
 269         {"ids2", DAQBOARD2000_SUBSYSTEM_IDS2},
 270         {"ids4", DAQBOARD2000_SUBSYSTEM_IDS4},
 271 };
 272
 273 struct daqboard2000_private {
 274         enum {
 275                 card_daqboard_2000
 276         } card;
 277         void __iomem *plx;
 278 };
 279
 280 static void writeAcqScanListEntry(struct comedi_device *dev, u16 entry)
 281 {
 282         writew(entry & 0x00ff, dev->mmio + DB2K_REG_ACQ_SCAN_LIST_FIFO);
 283         writew((entry >> 8) & 0x00ff,
 284                dev->mmio + DB2K_REG_ACQ_SCAN_LIST_FIFO);
 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         /* These should be read from EEPROM */
 319         word2 |= 0x0800;        /* offset */
 320         word3 |= 0xc000;        /* gain */
 321         writeAcqScanListEntry(dev, word0);
 322         writeAcqScanListEntry(dev, word1);
 323         writeAcqScanListEntry(dev, word2);
 324         writeAcqScanListEntry(dev, word3);
 325 }
 326
 327 static int daqboard2000_ai_status(struct comedi_device *dev,
 328                                   struct comedi_subdevice *s,
 329                                   struct comedi_insn *insn,
 330                                   unsigned long context)
 331 {
 332         unsigned int status;
 333
 334         status = readw(dev->mmio + DB2K_REG_ACQ_CONTROL);
 335         if (status & context)
 336                 return 0;
 337         return -EBUSY;
 338 }
 339
 340 static int daqboard2000_ai_insn_read(struct comedi_device *dev,
 341                                      struct comedi_subdevice *s,
 342                                      struct comedi_insn *insn,
 343                                      unsigned int *data)
 344 {
 345         int gain, chan;
 346         int ret;
 347         int i;
 348
 349         writew(DAQBOARD2000_AcqResetScanListFifo |
 350                DAQBOARD2000_AcqResetResultsFifo |
 351                DAQBOARD2000_AcqResetConfigPipe,
 352                dev->mmio + DB2K_REG_ACQ_CONTROL);
 353
 354         /*
 355          * If pacer clock is not set to some high value (> 10 us), we
 356          * risk multiple samples to be put into the result FIFO.
 357          */
 358         /* 1 second, should be long enough */
 359         writel(1000000, dev->mmio + DB2K_REG_ACQ_PACER_CLOCK_DIV_LOW);
 360         writew(0, dev->mmio + DB2K_REG_ACQ_PACER_CLOCK_DIV_HIGH);
 361
 362         gain = CR_RANGE(insn->chanspec);
 363         chan = CR_CHAN(insn->chanspec);
 364
 365         /*
 366          * This doesn't look efficient.  I decided to take the conservative
 367          * approach when I did the insn conversion.  Perhaps it would be
 368          * better to have broken it completely, then someone would have been
 369          * forced to fix it.  --ds
 370          */
 371         for (i = 0; i < insn->n; i++) {
 372                 setup_sampling(dev, chan, gain);
 373                 /* Enable reading from the scanlist FIFO */
 374                 writew(DAQBOARD2000_SeqStartScanList,
 375                        dev->mmio + DB2K_REG_ACQ_CONTROL);
 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,
 383                        dev->mmio + DB2K_REG_ACQ_CONTROL);
 384
 385                 ret = comedi_timeout(dev, s, insn, daqboard2000_ai_status,
 386                                      DAQBOARD2000_AcqLogicScanning);
 387                 if (ret)
 388                         return ret;
 389
 390                 ret = comedi_timeout(dev, s, insn, daqboard2000_ai_status,
 391                                      DAQBOARD2000_AcqResultsFIFOHasValidData);
 392                 if (ret)
 393                         return ret;
 394
 395                 data[i] = readw(dev->mmio + DB2K_REG_ACQ_RESULTS_FIFO);
 396                 writew(DAQBOARD2000_AdcPacerDisable,
 397                        dev->mmio + DB2K_REG_ACQ_CONTROL);
 398                 writew(DAQBOARD2000_SeqStopScanList,
 399                        dev->mmio + DB2K_REG_ACQ_CONTROL);
 400         }
 401
 402         return i;
 403 }
 404
 405 static int daqboard2000_ao_eoc(struct comedi_device *dev,
 406                                struct comedi_subdevice *s,
 407                                struct comedi_insn *insn,
 408                                unsigned long context)
 409 {
 410         unsigned int chan = CR_CHAN(insn->chanspec);
 411         unsigned int status;
 412
 413         status = readw(dev->mmio + DB2K_REG_DAC_CONTROL);
 414         if ((status & ((chan + 1) * 0x0010)) == 0)
 415                 return 0;
 416         return -EBUSY;
 417 }
 418
 419 static int daqboard2000_ao_insn_write(struct comedi_device *dev,
 420                                       struct comedi_subdevice *s,
 421                                       struct comedi_insn *insn,
 422                                       unsigned int *data)
 423 {
 424         unsigned int chan = CR_CHAN(insn->chanspec);
 425         int i;
 426
 427         for (i = 0; i < insn->n; i++) {
 428                 unsigned int val = data[i];
 429                 int ret;
 430
 431                 writew(val, dev->mmio + DB2K_REG_DAC_SETTING(chan));
 432
 433                 ret = comedi_timeout(dev, s, insn, daqboard2000_ao_eoc, 0);
 434                 if (ret)
 435                         return ret;
 436
 437                 s->readback[chan] = val;
 438         }
 439
 440         return insn->n;
 441 }
 442
 443 static void daqboard2000_resetLocalBus(struct comedi_device *dev)
 444 {
 445         struct daqboard2000_private *devpriv = dev->private;
 446
 447         writel(DB2K_SECR_LOCAL_BUS_HI, devpriv->plx + 0x6c);
 448         mdelay(10);
 449         writel(DB2K_SECR_LOCAL_BUS_LO, devpriv->plx + 0x6c);
 450         mdelay(10);
 451 }
 452
 453 static void daqboard2000_reloadPLX(struct comedi_device *dev)
 454 {
 455         struct daqboard2000_private *devpriv = dev->private;
 456
 457         writel(DB2K_SECR_RELOAD_LO, devpriv->plx + 0x6c);
 458         mdelay(10);
 459         writel(DB2K_SECR_RELOAD_HI, devpriv->plx + 0x6c);
 460         mdelay(10);
 461         writel(DB2K_SECR_RELOAD_LO, devpriv->plx + 0x6c);
 462         mdelay(10);
 463 }
 464
 465 static void daqboard2000_pulseProgPin(struct comedi_device *dev)
 466 {
 467         struct daqboard2000_private *devpriv = dev->private;
 468
 469         writel(DB2K_SECR_PROG_PIN_HI, devpriv->plx + 0x6c);
 470         mdelay(10);
 471         writel(DB2K_SECR_PROG_PIN_LO, devpriv->plx + 0x6c);
 472         mdelay(10);     /* Not in the original code, but I like symmetry... */
 473 }
 474
 475 static int daqboard2000_pollCPLD(struct comedi_device *dev, int mask)
 476 {
 477         int result = 0;
 478         int i;
 479         int cpld;
 480
 481         /* timeout after 50 tries -> 5ms */
 482         for (i = 0; i < 50; i++) {
 483                 cpld = readw(dev->mmio + 0x1000);
 484                 if ((cpld & mask) == mask) {
 485                         result = 1;
 486                         break;
 487                 }
 488                 udelay(100);
 489         }
 490         udelay(5);
 491         return result;
 492 }
 493
 494 static int daqboard2000_writeCPLD(struct comedi_device *dev, int data)
 495 {
 496         int result = 0;
 497
 498         udelay(10);
 499         writew(data, dev->mmio + 0x1000);
 500         if ((readw(dev->mmio + 0x1000) & DAQBOARD2000_CPLD_INIT) ==
 501             DAQBOARD2000_CPLD_INIT) {
 502                 result = 1;
 503         }
 504         return result;
 505 }
 506
 507 static int initialize_daqboard2000(struct comedi_device *dev,
 508                                    const u8 *cpld_array, size_t len,
 509                                    unsigned long context)
 510 {
 511         struct daqboard2000_private *devpriv = dev->private;
 512         int result = -EIO;
 513         /* Read the serial EEPROM control register */
 514         int secr;
 515         int retry;
 516         size_t i;
 517
 518         /* Check to make sure the serial eeprom is present on the board */
 519         secr = readl(devpriv->plx + 0x6c);
 520         if (!(secr & DAQBOARD2000_EEPROM_PRESENT))
 521                 return -EIO;
 522
 523         for (retry = 0; retry < 3; retry++) {
 524                 daqboard2000_resetLocalBus(dev);
 525                 daqboard2000_reloadPLX(dev);
 526                 daqboard2000_pulseProgPin(dev);
 527                 if (daqboard2000_pollCPLD(dev, DAQBOARD2000_CPLD_INIT)) {
 528                         for (i = 0; i < len; i++) {
 529                                 if (cpld_array[i] == 0xff &&
 530                                     cpld_array[i + 1] == 0x20)
 531                                         break;
 532                         }
 533                         for (; i < len; i += 2) {
 534                                 int data =
 535                                     (cpld_array[i] << 8) + cpld_array[i + 1];
 536                                 if (!daqboard2000_writeCPLD(dev, data))
 537                                         break;
 538                         }
 539                         if (i >= len) {
 540                                 daqboard2000_resetLocalBus(dev);
 541                                 daqboard2000_reloadPLX(dev);
 542                                 result = 0;
 543                                 break;
 544                         }
 545                 }
 546         }
 547         return result;
 548 }
 549
 550 static void daqboard2000_adcStopDmaTransfer(struct comedi_device *dev)
 551 {
 552 }
 553
 554 static void daqboard2000_adcDisarm(struct comedi_device *dev)
 555 {
 556         /* Disable hardware triggers */
 557         udelay(2);
 558         writew(DAQBOARD2000_TrigAnalog | DAQBOARD2000_TrigDisable,
 559                dev->mmio + DB2K_REG_TRIG_CONTROL);
 560         udelay(2);
 561         writew(DAQBOARD2000_TrigTTL | DAQBOARD2000_TrigDisable,
 562                dev->mmio + DB2K_REG_TRIG_CONTROL);
 563
 564         /* Stop the scan list FIFO from loading the configuration pipe */
 565         udelay(2);
 566         writew(DAQBOARD2000_SeqStopScanList,
 567                dev->mmio + DB2K_REG_ACQ_CONTROL);
 568
 569         /* Stop the pacer clock */
 570         udelay(2);
 571         writew(DAQBOARD2000_AdcPacerDisable,
 572                dev->mmio + DB2K_REG_ACQ_CONTROL);
 573
 574         /* Stop the input dma (abort channel 1) */
 575         daqboard2000_adcStopDmaTransfer(dev);
 576 }
 577
 578 static void daqboard2000_activateReferenceDacs(struct comedi_device *dev)
 579 {
 580         unsigned int val;
 581         int timeout;
 582
 583         /*  Set the + reference dac value in the FPGA */
 584         writew(0x80 | DAQBOARD2000_PosRefDacSelect,
 585                dev->mmio + DB2K_REG_REF_DACS);
 586         for (timeout = 0; timeout < 20; timeout++) {
 587                 val = readw(dev->mmio + DB2K_REG_DAC_CONTROL);
 588                 if ((val & DAQBOARD2000_RefBusy) == 0)
 589                         break;
 590                 udelay(2);
 591         }
 592
 593         /*  Set the - reference dac value in the FPGA */
 594         writew(0x80 | DAQBOARD2000_NegRefDacSelect,
 595                dev->mmio + DB2K_REG_REF_DACS);
 596         for (timeout = 0; timeout < 20; timeout++) {
 597                 val = readw(dev->mmio + DB2K_REG_DAC_CONTROL);
 598                 if ((val & DAQBOARD2000_RefBusy) == 0)
 599                         break;
 600                 udelay(2);
 601         }
 602 }
 603
 604 static void daqboard2000_initializeCtrs(struct comedi_device *dev)
 605 {
 606 }
 607
 608 static void daqboard2000_initializeTmrs(struct comedi_device *dev)
 609 {
 610 }
 611
 612 static void daqboard2000_dacDisarm(struct comedi_device *dev)
 613 {
 614 }
 615
 616 static void daqboard2000_initializeAdc(struct comedi_device *dev)
 617 {
 618         daqboard2000_adcDisarm(dev);
 619         daqboard2000_activateReferenceDacs(dev);
 620         daqboard2000_initializeCtrs(dev);
 621         daqboard2000_initializeTmrs(dev);
 622 }
 623
 624 static void daqboard2000_initializeDac(struct comedi_device *dev)
 625 {
 626         daqboard2000_dacDisarm(dev);
 627 }
 628
 629 static int daqboard2000_8255_cb(struct comedi_device *dev,
 630                                 int dir, int port, int data,
 631                                 unsigned long iobase)
 632 {
 633         if (dir) {
 634                 writew(data, dev->mmio + iobase + port * 2);
 635                 return 0;
 636         }
 637         return readw(dev->mmio + iobase + port * 2);
 638 }
 639
 640 static const void *daqboard2000_find_boardinfo(struct comedi_device *dev,
 641                                                struct pci_dev *pcidev)
 642 {
 643         const struct daq200_boardtype *board;
 644         int i;
 645
 646         if (pcidev->subsystem_device != PCI_VENDOR_ID_IOTECH)
 647                 return NULL;
 648
 649         for (i = 0; i < ARRAY_SIZE(boardtypes); i++) {
 650                 board = &boardtypes[i];
 651                 if (pcidev->subsystem_device == board->id)
 652                         return board;
 653         }
 654         return NULL;
 655 }
 656
 657 static int daqboard2000_auto_attach(struct comedi_device *dev,
 658                                     unsigned long context_unused)
 659 {
 660         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 661         const struct daq200_boardtype *board;
 662         struct daqboard2000_private *devpriv;
 663         struct comedi_subdevice *s;
 664         int result;
 665
 666         board = daqboard2000_find_boardinfo(dev, pcidev);
 667         if (!board)
 668                 return -ENODEV;
 669         dev->board_ptr = board;
 670         dev->board_name = board->name;
 671
 672         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 673         if (!devpriv)
 674                 return -ENOMEM;
 675
 676         result = comedi_pci_enable(dev);
 677         if (result)
 678                 return result;
 679
 680         devpriv->plx = pci_ioremap_bar(pcidev, 0);
 681         dev->mmio = pci_ioremap_bar(pcidev, 2);
 682         if (!devpriv->plx || !dev->mmio)
 683                 return -ENOMEM;
 684
 685         result = comedi_alloc_subdevices(dev, 3);
 686         if (result)
 687                 return result;
 688
 689         readl(devpriv->plx + 0x6c);
 690
 691         result = comedi_load_firmware(dev, &comedi_to_pci_dev(dev)->dev,
 692                                       DAQBOARD2000_FIRMWARE,
 693                                       initialize_daqboard2000, 0);
 694         if (result < 0)
 695                 return result;
 696
 697         daqboard2000_initializeAdc(dev);
 698         daqboard2000_initializeDac(dev);
 699
 700         s = &dev->subdevices[0];
 701         /* ai subdevice */
 702         s->type = COMEDI_SUBD_AI;
 703         s->subdev_flags = SDF_READABLE | SDF_GROUND;
 704         s->n_chan = 24;
 705         s->maxdata = 0xffff;
 706         s->insn_read = daqboard2000_ai_insn_read;
 707         s->range_table = &range_daqboard2000_ai;
 708
 709         s = &dev->subdevices[1];
 710         /* ao subdevice */
 711         s->type = COMEDI_SUBD_AO;
 712         s->subdev_flags = SDF_WRITABLE;
 713         s->n_chan = 2;
 714         s->maxdata = 0xffff;
 715         s->insn_write = daqboard2000_ao_insn_write;
 716         s->range_table = &range_bipolar10;
 717
 718         result = comedi_alloc_subdev_readback(s);
 719         if (result)
 720                 return result;
 721
 722         s = &dev->subdevices[2];
 723         return subdev_8255_init(dev, s, daqboard2000_8255_cb,
 724                                 DB2K_REG_DIO_P2_EXP_IO_8_BIT);
 725 }
 726
 727 static void daqboard2000_detach(struct comedi_device *dev)
 728 {
 729         struct daqboard2000_private *devpriv = dev->private;
 730
 731         if (devpriv && devpriv->plx)
 732                 iounmap(devpriv->plx);
 733         comedi_pci_detach(dev);
 734 }
 735
 736 static struct comedi_driver daqboard2000_driver = {
 737         .driver_name    = "daqboard2000",
 738         .module         = THIS_MODULE,
 739         .auto_attach    = daqboard2000_auto_attach,
 740         .detach         = daqboard2000_detach,
 741 };
 742
 743 static int daqboard2000_pci_probe(struct pci_dev *dev,
 744                                   const struct pci_device_id *id)
 745 {
 746         return comedi_pci_auto_config(dev, &daqboard2000_driver,
 747                                       id->driver_data);
 748 }
 749
 750 static const struct pci_device_id daqboard2000_pci_table[] = {
 751         { PCI_DEVICE(PCI_VENDOR_ID_IOTECH, 0x0409) },
 752         { 0 }
 753 };
 754 MODULE_DEVICE_TABLE(pci, daqboard2000_pci_table);
 755
 756 static struct pci_driver daqboard2000_pci_driver = {
 757         .name           = "daqboard2000",
 758         .id_table       = daqboard2000_pci_table,
 759         .probe          = daqboard2000_pci_probe,
 760         .remove         = comedi_pci_auto_unconfig,
 761 };
 762 module_comedi_pci_driver(daqboard2000_driver, daqboard2000_pci_driver);
 763
 764 MODULE_AUTHOR("Comedi http://www.comedi.org");
 765 MODULE_DESCRIPTION("Comedi low-level driver");
 766 MODULE_LICENSE("GPL");
 767 MODULE_FIRMWARE(DAQBOARD2000_FIRMWARE);