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Linux/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         result = subdev_8255_init(dev, s, daqboard2000_8255_cb,
717                                   dioP2ExpansionIO8Bit);
718         if (result)
719                 return result;
720 
721         return 0;
722 }
723 
724 static void daqboard2000_detach(struct comedi_device *dev)
725 {
726         struct daqboard2000_private *devpriv = dev->private;
727 
728         if (devpriv && devpriv->plx)
729                 iounmap(devpriv->plx);
730         comedi_pci_detach(dev);
731 }
732 
733 static struct comedi_driver daqboard2000_driver = {
734         .driver_name    = "daqboard2000",
735         .module         = THIS_MODULE,
736         .auto_attach    = daqboard2000_auto_attach,
737         .detach         = daqboard2000_detach,
738 };
739 
740 static int daqboard2000_pci_probe(struct pci_dev *dev,
741                                   const struct pci_device_id *id)
742 {
743         return comedi_pci_auto_config(dev, &daqboard2000_driver,
744                                       id->driver_data);
745 }
746 
747 static const struct pci_device_id daqboard2000_pci_table[] = {
748         { PCI_DEVICE(PCI_VENDOR_ID_IOTECH, 0x0409) },
749         { 0 }
750 };
751 MODULE_DEVICE_TABLE(pci, daqboard2000_pci_table);
752 
753 static struct pci_driver daqboard2000_pci_driver = {
754         .name           = "daqboard2000",
755         .id_table       = daqboard2000_pci_table,
756         .probe          = daqboard2000_pci_probe,
757         .remove         = comedi_pci_auto_unconfig,
758 };
759 module_comedi_pci_driver(daqboard2000_driver, daqboard2000_pci_driver);
760 
761 MODULE_AUTHOR("Comedi http://www.comedi.org");
762 MODULE_DESCRIPTION("Comedi low-level driver");
763 MODULE_LICENSE("GPL");
764 MODULE_FIRMWARE(DAQBOARD2000_FIRMWARE);
765 

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