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 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         writew(entry & 0x00ff, dev->mmio + acqScanListFIFO);
 282         writew((entry >> 8) & 0x00ff, dev->mmio + acqScanListFIFO);
 283 }
 284
 285 static void setup_sampling(struct comedi_device *dev, int chan, int gain)
 286 {
 287         u16 word0, word1, word2, word3;
 288
 289         /* Channel 0-7 diff, channel 8-23 single ended */
 290         word0 = 0;
 291         word1 = 0x0004;         /* Last scan */
 292         word2 = (chan << 6) & 0x00c0;
 293         switch (chan / 4) {
 294         case 0:
 295                 word3 = 0x0001;
 296                 break;
 297         case 1:
 298                 word3 = 0x0002;
 299                 break;
 300         case 2:
 301                 word3 = 0x0005;
 302                 break;
 303         case 3:
 304                 word3 = 0x0006;
 305                 break;
 306         case 4:
 307                 word3 = 0x0041;
 308                 break;
 309         case 5:
 310                 word3 = 0x0042;
 311                 break;
 312         default:
 313                 word3 = 0;
 314                 break;
 315         }
 316         /* These should be read from EEPROM */
 317         word2 |= 0x0800;        /* offset */
 318         word3 |= 0xc000;        /* gain */
 319         writeAcqScanListEntry(dev, word0);
 320         writeAcqScanListEntry(dev, word1);
 321         writeAcqScanListEntry(dev, word2);
 322         writeAcqScanListEntry(dev, word3);
 323 }
 324
 325 static int daqboard2000_ai_status(struct comedi_device *dev,
 326                                   struct comedi_subdevice *s,
 327                                   struct comedi_insn *insn,
 328                                   unsigned long context)
 329 {
 330         unsigned int status;
 331
 332         status = readw(dev->mmio + acqControl);
 333         if (status & context)
 334                 return 0;
 335         return -EBUSY;
 336 }
 337
 338 static int daqboard2000_ai_insn_read(struct comedi_device *dev,
 339                                      struct comedi_subdevice *s,
 340                                      struct comedi_insn *insn,
 341                                      unsigned int *data)
 342 {
 343         int gain, chan;
 344         int ret;
 345         int i;
 346
 347         writew(DAQBOARD2000_AcqResetScanListFifo |
 348                DAQBOARD2000_AcqResetResultsFifo |
 349                DAQBOARD2000_AcqResetConfigPipe, dev->mmio + acqControl);
 350
 351         /*
 352          * If pacer clock is not set to some high value (> 10 us), we
 353          * risk multiple samples to be put into the result FIFO.
 354          */
 355         /* 1 second, should be long enough */
 356         writel(1000000, dev->mmio + acqPacerClockDivLow);
 357         writew(0, dev->mmio + acqPacerClockDivHigh);
 358
 359         gain = CR_RANGE(insn->chanspec);
 360         chan = CR_CHAN(insn->chanspec);
 361
 362         /* This doesn't look efficient.  I decided to take the conservative
 363          * approach when I did the insn conversion.  Perhaps it would be
 364          * better to have broken it completely, then someone would have been
 365          * forced to fix it.  --ds */
 366         for (i = 0; i < insn->n; i++) {
 367                 setup_sampling(dev, chan, gain);
 368                 /* Enable reading from the scanlist FIFO */
 369                 writew(DAQBOARD2000_SeqStartScanList, dev->mmio + acqControl);
 370
 371                 ret = comedi_timeout(dev, s, insn, daqboard2000_ai_status,
 372                                      DAQBOARD2000_AcqConfigPipeFull);
 373                 if (ret)
 374                         return ret;
 375
 376                 writew(DAQBOARD2000_AdcPacerEnable, dev->mmio + acqControl);
 377
 378                 ret = comedi_timeout(dev, s, insn, daqboard2000_ai_status,
 379                                      DAQBOARD2000_AcqLogicScanning);
 380                 if (ret)
 381                         return ret;
 382
 383                 ret = comedi_timeout(dev, s, insn, daqboard2000_ai_status,
 384                                      DAQBOARD2000_AcqResultsFIFOHasValidData);
 385                 if (ret)
 386                         return ret;
 387
 388                 data[i] = readw(dev->mmio + acqResultsFIFO);
 389                 writew(DAQBOARD2000_AdcPacerDisable, dev->mmio + acqControl);
 390                 writew(DAQBOARD2000_SeqStopScanList, dev->mmio + acqControl);
 391         }
 392
 393         return i;
 394 }
 395
 396 static int daqboard2000_ao_eoc(struct comedi_device *dev,
 397                                struct comedi_subdevice *s,
 398                                struct comedi_insn *insn,
 399                                unsigned long context)
 400 {
 401         unsigned int chan = CR_CHAN(insn->chanspec);
 402         unsigned int status;
 403
 404         status = readw(dev->mmio + dacControl);
 405         if ((status & ((chan + 1) * 0x0010)) == 0)
 406                 return 0;
 407         return -EBUSY;
 408 }
 409
 410 static int daqboard2000_ao_insn_write(struct comedi_device *dev,
 411                                       struct comedi_subdevice *s,
 412                                       struct comedi_insn *insn,
 413                                       unsigned int *data)
 414 {
 415         unsigned int chan = CR_CHAN(insn->chanspec);
 416         int i;
 417
 418         for (i = 0; i < insn->n; i++) {
 419                 unsigned int val = data[i];
 420                 int ret;
 421
 422                 writew(val, dev->mmio + dacSetting(chan));
 423
 424                 ret = comedi_timeout(dev, s, insn, daqboard2000_ao_eoc, 0);
 425                 if (ret)
 426                         return ret;
 427
 428                 s->readback[chan] = val;
 429         }
 430
 431         return insn->n;
 432 }
 433
 434 static void daqboard2000_resetLocalBus(struct comedi_device *dev)
 435 {
 436         struct daqboard2000_private *devpriv = dev->private;
 437
 438         writel(DAQBOARD2000_SECRLocalBusHi, devpriv->plx + 0x6c);
 439         mdelay(10);
 440         writel(DAQBOARD2000_SECRLocalBusLo, devpriv->plx + 0x6c);
 441         mdelay(10);
 442 }
 443
 444 static void daqboard2000_reloadPLX(struct comedi_device *dev)
 445 {
 446         struct daqboard2000_private *devpriv = dev->private;
 447
 448         writel(DAQBOARD2000_SECRReloadLo, devpriv->plx + 0x6c);
 449         mdelay(10);
 450         writel(DAQBOARD2000_SECRReloadHi, devpriv->plx + 0x6c);
 451         mdelay(10);
 452         writel(DAQBOARD2000_SECRReloadLo, devpriv->plx + 0x6c);
 453         mdelay(10);
 454 }
 455
 456 static void daqboard2000_pulseProgPin(struct comedi_device *dev)
 457 {
 458         struct daqboard2000_private *devpriv = dev->private;
 459
 460         writel(DAQBOARD2000_SECRProgPinHi, devpriv->plx + 0x6c);
 461         mdelay(10);
 462         writel(DAQBOARD2000_SECRProgPinLo, devpriv->plx + 0x6c);
 463         mdelay(10);     /* Not in the original code, but I like symmetry... */
 464 }
 465
 466 static int daqboard2000_pollCPLD(struct comedi_device *dev, int mask)
 467 {
 468         int result = 0;
 469         int i;
 470         int cpld;
 471
 472         /* timeout after 50 tries -> 5ms */
 473         for (i = 0; i < 50; i++) {
 474                 cpld = readw(dev->mmio + 0x1000);
 475                 if ((cpld & mask) == mask) {
 476                         result = 1;
 477                         break;
 478                 }
 479                 udelay(100);
 480         }
 481         udelay(5);
 482         return result;
 483 }
 484
 485 static int daqboard2000_writeCPLD(struct comedi_device *dev, int data)
 486 {
 487         int result = 0;
 488
 489         udelay(10);
 490         writew(data, dev->mmio + 0x1000);
 491         if ((readw(dev->mmio + 0x1000) & DAQBOARD2000_CPLD_INIT) ==
 492             DAQBOARD2000_CPLD_INIT) {
 493                 result = 1;
 494         }
 495         return result;
 496 }
 497
 498 static int initialize_daqboard2000(struct comedi_device *dev,
 499                                    const u8 *cpld_array, size_t len,
 500                                    unsigned long context)
 501 {
 502         struct daqboard2000_private *devpriv = dev->private;
 503         int result = -EIO;
 504         /* Read the serial EEPROM control register */
 505         int secr;
 506         int retry;
 507         size_t i;
 508
 509         /* Check to make sure the serial eeprom is present on the board */
 510         secr = readl(devpriv->plx + 0x6c);
 511         if (!(secr & DAQBOARD2000_EEPROM_PRESENT))
 512                 return -EIO;
 513
 514         for (retry = 0; retry < 3; retry++) {
 515                 daqboard2000_resetLocalBus(dev);
 516                 daqboard2000_reloadPLX(dev);
 517                 daqboard2000_pulseProgPin(dev);
 518                 if (daqboard2000_pollCPLD(dev, DAQBOARD2000_CPLD_INIT)) {
 519                         for (i = 0; i < len; i++) {
 520                                 if (cpld_array[i] == 0xff &&
 521                                     cpld_array[i + 1] == 0x20)
 522                                         break;
 523                         }
 524                         for (; i < len; i += 2) {
 525                                 int data =
 526                                     (cpld_array[i] << 8) + cpld_array[i + 1];
 527                                 if (!daqboard2000_writeCPLD(dev, data))
 528                                         break;
 529                         }
 530                         if (i >= len) {
 531                                 daqboard2000_resetLocalBus(dev);
 532                                 daqboard2000_reloadPLX(dev);
 533                                 result = 0;
 534                                 break;
 535                         }
 536                 }
 537         }
 538         return result;
 539 }
 540
 541 static void daqboard2000_adcStopDmaTransfer(struct comedi_device *dev)
 542 {
 543 }
 544
 545 static void daqboard2000_adcDisarm(struct comedi_device *dev)
 546 {
 547         /* Disable hardware triggers */
 548         udelay(2);
 549         writew(DAQBOARD2000_TrigAnalog | DAQBOARD2000_TrigDisable,
 550                dev->mmio + trigControl);
 551         udelay(2);
 552         writew(DAQBOARD2000_TrigTTL | DAQBOARD2000_TrigDisable,
 553                dev->mmio + trigControl);
 554
 555         /* Stop the scan list FIFO from loading the configuration pipe */
 556         udelay(2);
 557         writew(DAQBOARD2000_SeqStopScanList, dev->mmio + acqControl);
 558
 559         /* Stop the pacer clock */
 560         udelay(2);
 561         writew(DAQBOARD2000_AdcPacerDisable, dev->mmio + acqControl);
 562
 563         /* Stop the input dma (abort channel 1) */
 564         daqboard2000_adcStopDmaTransfer(dev);
 565 }
 566
 567 static void daqboard2000_activateReferenceDacs(struct comedi_device *dev)
 568 {
 569         unsigned int val;
 570         int timeout;
 571
 572         /*  Set the + reference dac value in the FPGA */
 573         writew(0x80 | DAQBOARD2000_PosRefDacSelect, dev->mmio + refDacs);
 574         for (timeout = 0; timeout < 20; timeout++) {
 575                 val = readw(dev->mmio + dacControl);
 576                 if ((val & DAQBOARD2000_RefBusy) == 0)
 577                         break;
 578                 udelay(2);
 579         }
 580
 581         /*  Set the - reference dac value in the FPGA */
 582         writew(0x80 | DAQBOARD2000_NegRefDacSelect, dev->mmio + refDacs);
 583         for (timeout = 0; timeout < 20; timeout++) {
 584                 val = readw(dev->mmio + dacControl);
 585                 if ((val & DAQBOARD2000_RefBusy) == 0)
 586                         break;
 587                 udelay(2);
 588         }
 589 }
 590
 591 static void daqboard2000_initializeCtrs(struct comedi_device *dev)
 592 {
 593 }
 594
 595 static void daqboard2000_initializeTmrs(struct comedi_device *dev)
 596 {
 597 }
 598
 599 static void daqboard2000_dacDisarm(struct comedi_device *dev)
 600 {
 601 }
 602
 603 static void daqboard2000_initializeAdc(struct comedi_device *dev)
 604 {
 605         daqboard2000_adcDisarm(dev);
 606         daqboard2000_activateReferenceDacs(dev);
 607         daqboard2000_initializeCtrs(dev);
 608         daqboard2000_initializeTmrs(dev);
 609 }
 610
 611 static void daqboard2000_initializeDac(struct comedi_device *dev)
 612 {
 613         daqboard2000_dacDisarm(dev);
 614 }
 615
 616 static int daqboard2000_8255_cb(struct comedi_device *dev,
 617                                 int dir, int port, int data,
 618                                 unsigned long iobase)
 619 {
 620         if (dir) {
 621                 writew(data, dev->mmio + iobase + port * 2);
 622                 return 0;
 623         }
 624         return readw(dev->mmio + iobase + port * 2);
 625 }
 626
 627 static const void *daqboard2000_find_boardinfo(struct comedi_device *dev,
 628                                                struct pci_dev *pcidev)
 629 {
 630         const struct daq200_boardtype *board;
 631         int i;
 632
 633         if (pcidev->subsystem_device != PCI_VENDOR_ID_IOTECH)
 634                 return NULL;
 635
 636         for (i = 0; i < ARRAY_SIZE(boardtypes); i++) {
 637                 board = &boardtypes[i];
 638                 if (pcidev->subsystem_device == board->id)
 639                         return board;
 640         }
 641         return NULL;
 642 }
 643
 644 static int daqboard2000_auto_attach(struct comedi_device *dev,
 645                                     unsigned long context_unused)
 646 {
 647         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 648         const struct daq200_boardtype *board;
 649         struct daqboard2000_private *devpriv;
 650         struct comedi_subdevice *s;
 651         int result;
 652
 653         board = daqboard2000_find_boardinfo(dev, pcidev);
 654         if (!board)
 655                 return -ENODEV;
 656         dev->board_ptr = board;
 657         dev->board_name = board->name;
 658
 659         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 660         if (!devpriv)
 661                 return -ENOMEM;
 662
 663         result = comedi_pci_enable(dev);
 664         if (result)
 665                 return result;
 666
 667         devpriv->plx = pci_ioremap_bar(pcidev, 0);
 668         dev->mmio = pci_ioremap_bar(pcidev, 2);
 669         if (!devpriv->plx || !dev->mmio)
 670                 return -ENOMEM;
 671
 672         result = comedi_alloc_subdevices(dev, 3);
 673         if (result)
 674                 return result;
 675
 676         readl(devpriv->plx + 0x6c);
 677
 678         result = comedi_load_firmware(dev, &comedi_to_pci_dev(dev)->dev,
 679                                       DAQBOARD2000_FIRMWARE,
 680                                       initialize_daqboard2000, 0);
 681         if (result < 0)
 682                 return result;
 683
 684         daqboard2000_initializeAdc(dev);
 685         daqboard2000_initializeDac(dev);
 686
 687         s = &dev->subdevices[0];
 688         /* ai subdevice */
 689         s->type = COMEDI_SUBD_AI;
 690         s->subdev_flags = SDF_READABLE | SDF_GROUND;
 691         s->n_chan = 24;
 692         s->maxdata = 0xffff;
 693         s->insn_read = daqboard2000_ai_insn_read;
 694         s->range_table = &range_daqboard2000_ai;
 695
 696         s = &dev->subdevices[1];
 697         /* ao subdevice */
 698         s->type = COMEDI_SUBD_AO;
 699         s->subdev_flags = SDF_WRITABLE;
 700         s->n_chan = 2;
 701         s->maxdata = 0xffff;
 702         s->insn_write = daqboard2000_ao_insn_write;
 703         s->range_table = &range_bipolar10;
 704
 705         result = comedi_alloc_subdev_readback(s);
 706         if (result)
 707                 return result;
 708
 709         s = &dev->subdevices[2];
 710         return subdev_8255_init(dev, s, daqboard2000_8255_cb,
 711                                 dioP2ExpansionIO8Bit);
 712 }
 713
 714 static void daqboard2000_detach(struct comedi_device *dev)
 715 {
 716         struct daqboard2000_private *devpriv = dev->private;
 717
 718         if (devpriv && devpriv->plx)
 719                 iounmap(devpriv->plx);
 720         comedi_pci_detach(dev);
 721 }
 722
 723 static struct comedi_driver daqboard2000_driver = {
 724         .driver_name    = "daqboard2000",
 725         .module         = THIS_MODULE,
 726         .auto_attach    = daqboard2000_auto_attach,
 727         .detach         = daqboard2000_detach,
 728 };
 729
 730 static int daqboard2000_pci_probe(struct pci_dev *dev,
 731                                   const struct pci_device_id *id)
 732 {
 733         return comedi_pci_auto_config(dev, &daqboard2000_driver,
 734                                       id->driver_data);
 735 }
 736
 737 static const struct pci_device_id daqboard2000_pci_table[] = {
 738         { PCI_DEVICE(PCI_VENDOR_ID_IOTECH, 0x0409) },
 739         { 0 }
 740 };
 741 MODULE_DEVICE_TABLE(pci, daqboard2000_pci_table);
 742
 743 static struct pci_driver daqboard2000_pci_driver = {
 744         .name           = "daqboard2000",
 745         .id_table       = daqboard2000_pci_table,
 746         .probe          = daqboard2000_pci_probe,
 747         .remove         = comedi_pci_auto_unconfig,
 748 };
 749 module_comedi_pci_driver(daqboard2000_driver, daqboard2000_pci_driver);
 750
 751 MODULE_AUTHOR("Comedi http://www.comedi.org");
 752 MODULE_DESCRIPTION("Comedi low-level driver");
 753 MODULE_LICENSE("GPL");
 754 MODULE_FIRMWARE(DAQBOARD2000_FIRMWARE);