drivers/staging/comedi/drivers/das16.c

   1 /*
   2     comedi/drivers/das16.c
   3     DAS16 driver
   4
   5     COMEDI - Linux Control and Measurement Device Interface
   6     Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   7     Copyright (C) 2000 Chris R. Baugher <baugher@enteract.com>
   8     Copyright (C) 2001,2002 Frank Mori Hess <fmhess@users.sourceforge.net>
   9
  10     This program is free software; you can redistribute it and/or modify
  11     it under the terms of the GNU General Public License as published by
  12     the Free Software Foundation; either version 2 of the License, or
  13     (at your option) any later version.
  14
  15     This program is distributed in the hope that it will be useful,
  16     but WITHOUT ANY WARRANTY; without even the implied warranty of
  17     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18     GNU General Public License for more details.
  19
  20     You should have received a copy of the GNU General Public License
  21     along with this program; if not, write to the Free Software
  22     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 ************************************************************************
  25 */
  26 /*
  27 Driver: das16
  28 Description: DAS16 compatible boards
  29 Author: Sam Moore, Warren Jasper, ds, Chris Baugher, Frank Hess, Roman Fietze
  30 Devices: [Keithley Metrabyte] DAS-16 (das-16), DAS-16G (das-16g),
  31   DAS-16F (das-16f), DAS-1201 (das-1201), DAS-1202 (das-1202),
  32   DAS-1401 (das-1401), DAS-1402 (das-1402), DAS-1601 (das-1601),
  33   DAS-1602 (das-1602),
  34   [ComputerBoards] PC104-DAS16/JR (pc104-das16jr),
  35   PC104-DAS16JR/16 (pc104-das16jr/16),
  36   CIO-DAS16JR/16 (cio-das16jr/16),
  37   CIO-DAS16/JR (cio-das16/jr), CIO-DAS1401/12 (cio-das1401/12),
  38   CIO-DAS1402/12 (cio-das1402/12), CIO-DAS1402/16 (cio-das1402/16),
  39   CIO-DAS1601/12 (cio-das1601/12), CIO-DAS1602/12 (cio-das1602/12),
  40   CIO-DAS1602/16 (cio-das1602/16), CIO-DAS16/330 (cio-das16/330)
  41 Status: works
  42 Updated: 2003-10-12
  43
  44 A rewrite of the das16 and das1600 drivers.
  45 Options:
  46         [0] - base io address
  47         [1] - irq (does nothing, irq is not used anymore)
  48         [2] - dma (optional, required for comedi_command support)
  49         [3] - master clock speed in MHz (optional, 1 or 10, ignored if
  50                 board can probe clock, defaults to 1)
  51         [4] - analog input range lowest voltage in microvolts (optional,
  52                 only useful if your board does not have software
  53                 programmable gain)
  54         [5] - analog input range highest voltage in microvolts (optional,
  55                 only useful if board does not have software programmable
  56                 gain)
  57         [6] - analog output range lowest voltage in microvolts (optional)
  58         [7] - analog output range highest voltage in microvolts (optional)
  59         [8] - use timer mode for DMA.  Timer mode is needed e.g. for
  60                 buggy DMA controllers in NS CS5530A (Geode Companion), and for
  61                 'jr' cards that lack a hardware fifo.  This option is no
  62                 longer needed, since timer mode is _always_ used.
  63
  64 Passing a zero for an option is the same as leaving it unspecified.
  65
  66 */
  67 /*
  68
  69 Testing and debugging help provided by Daniel Koch.
  70
  71 Keithley Manuals:
  72         2309.PDF (das16)
  73         4919.PDF (das1400, 1600)
  74         4922.PDF (das-1400)
  75         4923.PDF (das1200, 1400, 1600)
  76
  77 Computer boards manuals also available from their website
  78 www.measurementcomputing.com
  79
  80 */
  81
  82 #include <linux/pci.h>
  83 #include <linux/slab.h>
  84 #include <linux/interrupt.h>
  85
  86 #include <asm/dma.h>
  87
  88 #include "../comedidev.h"
  89
  90 #include "8253.h"
  91 #include "8255.h"
  92 #include "comedi_fc.h"
  93
  94 #undef DEBUG
  95 /* #define DEBUG */
  96
  97 #ifdef DEBUG
  98 #define DEBUG_PRINT(format, args...)    \
  99         printk(KERN_DEBUG "das16: " format, ## args)
 100 #else
 101 #define DEBUG_PRINT(format, args...)
 102 #endif
 103
 104 #define DAS16_SIZE 20           /*  number of ioports */
 105 #define DAS16_DMA_SIZE 0xff00   /*  size in bytes of allocated dma buffer */
 106
 107 /*
 108     cio-das16.pdf
 109
 110     "das16"
 111     "das16/f"
 112
 113   0     a/d bits 0-3            start 12 bit
 114   1     a/d bits 4-11           unused
 115   2     mux read                mux set
 116   3     di 4 bit                do 4 bit
 117   4     unused                  ao0_lsb
 118   5     unused                  ao0_msb
 119   6     unused                  ao1_lsb
 120   7     unused                  ao1_msb
 121   8     status eoc uni/bip      interrupt reset
 122   9     dma, int, trig ctrl     set dma, int
 123   a     pacer control           unused
 124   b     reserved                reserved
 125   cdef  8254
 126   0123  8255
 127
 128 */
 129
 130 /*
 131     cio-das16jr.pdf
 132
 133     "das16jr"
 134
 135   0     a/d bits 0-3            start 12 bit
 136   1     a/d bits 4-11           unused
 137   2     mux read                mux set
 138   3     di 4 bit                do 4 bit
 139   4567  unused                  unused
 140   8     status eoc uni/bip      interrupt reset
 141   9     dma, int, trig ctrl     set dma, int
 142   a     pacer control           unused
 143   b     gain status             gain control
 144   cdef  8254
 145
 146 */
 147
 148 /*
 149     cio-das16jr_16.pdf
 150
 151     "das16jr_16"
 152
 153   0     a/d bits 0-7            start 16 bit
 154   1     a/d bits 8-15           unused
 155   2     mux read                mux set
 156   3     di 4 bit                do 4 bit
 157   4567  unused                  unused
 158   8     status eoc uni/bip      interrupt reset
 159   9     dma, int, trig ctrl     set dma, int
 160   a     pacer control           unused
 161   b     gain status             gain control
 162   cdef  8254
 163
 164 */
 165 /*
 166     cio-das160x-1x.pdf
 167
 168     "das1601/12"
 169     "das1602/12"
 170     "das1602/16"
 171
 172   0     a/d bits 0-3            start 12 bit
 173   1     a/d bits 4-11           unused
 174   2     mux read                mux set
 175   3     di 4 bit                do 4 bit
 176   4     unused                  ao0_lsb
 177   5     unused                  ao0_msb
 178   6     unused                  ao1_lsb
 179   7     unused                  ao1_msb
 180   8     status eoc uni/bip      interrupt reset
 181   9     dma, int, trig ctrl     set dma, int
 182   a     pacer control           unused
 183   b     gain status             gain control
 184   cdef  8254
 185   400   8255
 186   404   unused                  conversion enable
 187   405   unused                  burst enable
 188   406   unused                  das1600 enable
 189   407   status
 190
 191 */
 192
 193 /*  size in bytes of a sample from board */
 194 static const int sample_size = 2;
 195
 196 #define DAS16_TRIG              0
 197 #define DAS16_AI_LSB            0
 198 #define DAS16_AI_MSB            1
 199 #define DAS16_MUX               2
 200 #define DAS16_DIO               3
 201 #define DAS16_AO_LSB(x) ((x) ? 6 : 4)
 202 #define DAS16_AO_MSB(x) ((x) ? 7 : 5)
 203 #define DAS16_STATUS            8
 204 #define   BUSY                  (1<<7)
 205 #define   UNIPOLAR                      (1<<6)
 206 #define   DAS16_MUXBIT                  (1<<5)
 207 #define   DAS16_INT                     (1<<4)
 208 #define DAS16_CONTROL           9
 209 #define   DAS16_INTE                    (1<<7)
 210 #define   DAS16_IRQ(x)                  (((x) & 0x7) << 4)
 211 #define   DMA_ENABLE                    (1<<2)
 212 #define   PACING_MASK   0x3
 213 #define   INT_PACER             0x03
 214 #define   EXT_PACER                     0x02
 215 #define   DAS16_SOFT            0x00
 216 #define DAS16_PACER             0x0A
 217 #define   DAS16_CTR0                    (1<<1)
 218 #define   DAS16_TRIG0                   (1<<0)
 219 #define   BURST_LEN_BITS(x)                     (((x) & 0xf) << 4)
 220 #define DAS16_GAIN              0x0B
 221 #define DAS16_CNTR0_DATA                0x0C
 222 #define DAS16_CNTR1_DATA                0x0D
 223 #define DAS16_CNTR2_DATA                0x0E
 224 #define DAS16_CNTR_CONTROL      0x0F
 225 #define   DAS16_TERM_CNT        0x00
 226 #define   DAS16_ONE_SHOT        0x02
 227 #define   DAS16_RATE_GEN        0x04
 228 #define   DAS16_CNTR_LSB_MSB    0x30
 229 #define   DAS16_CNTR0           0x00
 230 #define   DAS16_CNTR1           0x40
 231 #define   DAS16_CNTR2           0x80
 232
 233 #define DAS1600_CONV            0x404
 234 #define   DAS1600_CONV_DISABLE          0x40
 235 #define DAS1600_BURST           0x405
 236 #define   DAS1600_BURST_VAL             0x40
 237 #define DAS1600_ENABLE          0x406
 238 #define   DAS1600_ENABLE_VAL            0x40
 239 #define DAS1600_STATUS_B        0x407
 240 #define   DAS1600_BME           0x40
 241 #define   DAS1600_ME            0x20
 242 #define   DAS1600_CD                    0x10
 243 #define   DAS1600_WS                    0x02
 244 #define   DAS1600_CLK_10MHZ             0x01
 245
 246 static const struct comedi_lrange range_das1x01_bip = { 4, {
 247                                                             BIP_RANGE(10),
 248                                                             BIP_RANGE(1),
 249                                                             BIP_RANGE(0.1),
 250                                                             BIP_RANGE(0.01),
 251                                                             }
 252 };
 253
 254 static const struct comedi_lrange range_das1x01_unip = { 4, {
 255                                                              UNI_RANGE(10),
 256                                                              UNI_RANGE(1),
 257                                                              UNI_RANGE(0.1),
 258                                                              UNI_RANGE(0.01),
 259                                                              }
 260 };
 261
 262 static const struct comedi_lrange range_das1x02_bip = { 4, {
 263                                                             BIP_RANGE(10),
 264                                                             BIP_RANGE(5),
 265                                                             BIP_RANGE(2.5),
 266                                                             BIP_RANGE(1.25),
 267                                                             }
 268 };
 269
 270 static const struct comedi_lrange range_das1x02_unip = { 4, {
 271                                                              UNI_RANGE(10),
 272                                                              UNI_RANGE(5),
 273                                                              UNI_RANGE(2.5),
 274                                                              UNI_RANGE(1.25),
 275                                                              }
 276 };
 277
 278 static const struct comedi_lrange range_das16jr = { 9, {
 279                                                 /*  also used by 16/330 */
 280                                                         BIP_RANGE(10),
 281                                                         BIP_RANGE(5),
 282                                                         BIP_RANGE(2.5),
 283                                                         BIP_RANGE(1.25),
 284                                                         BIP_RANGE(0.625),
 285                                                         UNI_RANGE(10),
 286                                                         UNI_RANGE(5),
 287                                                         UNI_RANGE(2.5),
 288                                                         UNI_RANGE(1.25),
 289                                                         }
 290 };
 291
 292 static const struct comedi_lrange range_das16jr_16 = { 8, {
 293                                                            BIP_RANGE(10),
 294                                                            BIP_RANGE(5),
 295                                                            BIP_RANGE(2.5),
 296                                                            BIP_RANGE(1.25),
 297                                                            UNI_RANGE(10),
 298                                                            UNI_RANGE(5),
 299                                                            UNI_RANGE(2.5),
 300                                                            UNI_RANGE(1.25),
 301                                                            }
 302 };
 303
 304 static const int das16jr_gainlist[] = { 8, 0, 1, 2, 3, 4, 5, 6, 7 };
 305 static const int das16jr_16_gainlist[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
 306 static const int das1600_gainlist[] = { 0, 1, 2, 3 };
 307
 308 enum {
 309         das16_pg_none = 0,
 310         das16_pg_16jr,
 311         das16_pg_16jr_16,
 312         das16_pg_1601,
 313         das16_pg_1602,
 314 };
 315 static const int *const das16_gainlists[] = {
 316         NULL,
 317         das16jr_gainlist,
 318         das16jr_16_gainlist,
 319         das1600_gainlist,
 320         das1600_gainlist,
 321 };
 322
 323 static const struct comedi_lrange *const das16_ai_uni_lranges[] = {
 324         &range_unknown,
 325         &range_das16jr,
 326         &range_das16jr_16,
 327         &range_das1x01_unip,
 328         &range_das1x02_unip,
 329 };
 330
 331 static const struct comedi_lrange *const das16_ai_bip_lranges[] = {
 332         &range_unknown,
 333         &range_das16jr,
 334         &range_das16jr_16,
 335         &range_das1x01_bip,
 336         &range_das1x02_bip,
 337 };
 338
 339 struct munge_info {
 340         uint8_t byte;
 341         unsigned have_byte:1;
 342 };
 343
 344 struct das16_board {
 345         const char *name;
 346         void *ai;
 347         unsigned int ai_nbits;
 348         unsigned int ai_speed;  /*  max conversion speed in nanosec */
 349         unsigned int ai_pg;
 350         void *ao;
 351         unsigned int ao_nbits;
 352         void *di;
 353         void *do_;
 354
 355         unsigned int i8255_offset;
 356         unsigned int i8254_offset;
 357
 358         unsigned int size;
 359         unsigned int id;
 360 };
 361
 362 #define DAS16_TIMEOUT 1000
 363
 364 /* Period for timer interrupt in jiffies.  It's a function
 365  * to deal with possibility of dynamic HZ patches  */
 366 static inline int timer_period(void)
 367 {
 368         return HZ / 20;
 369 }
 370
 371 struct das16_private_struct {
 372         unsigned int ai_unipolar;       /*  unipolar flag */
 373         unsigned int ai_singleended;    /*  single ended flag */
 374         unsigned int clockbase; /*  master clock speed in ns */
 375         volatile unsigned int control_state;    /*  dma, interrupt and trigger control bits */
 376         volatile unsigned long adc_byte_count;  /*  number of bytes remaining */
 377         /*  divisor dividing master clock to get conversion frequency */
 378         unsigned int divisor1;
 379         /*  divisor dividing master clock to get conversion frequency */
 380         unsigned int divisor2;
 381         unsigned int dma_chan;  /*  dma channel */
 382         uint16_t *dma_buffer[2];
 383         dma_addr_t dma_buffer_addr[2];
 384         unsigned int current_buffer;
 385         volatile unsigned int dma_transfer_size;        /*  target number of bytes to transfer per dma shot */
 386         /**
 387          * user-defined analog input and output ranges
 388          * defined from config options
 389          */
 390         struct comedi_lrange *user_ai_range_table;
 391         struct comedi_lrange *user_ao_range_table;
 392
 393         struct timer_list timer;        /*  for timed interrupt */
 394         volatile short timer_running;
 395         volatile short timer_mode;      /*  true if using timer mode */
 396 };
 397
 398 static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
 399                           struct comedi_cmd *cmd)
 400 {
 401         const struct das16_board *board = comedi_board(dev);
 402         struct das16_private_struct *devpriv = dev->private;
 403         int err = 0, tmp;
 404         int gain, start_chan, i;
 405         int mask;
 406
 407         /* Step 1 : check if triggers are trivially valid */
 408
 409         err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
 410
 411         mask = TRIG_FOLLOW;
 412         /*  if board supports burst mode */
 413         if (board->size > 0x400)
 414                 mask |= TRIG_TIMER | TRIG_EXT;
 415         err |= cfc_check_trigger_src(&cmd->scan_begin_src, mask);
 416
 417         tmp = cmd->convert_src;
 418         mask = TRIG_TIMER | TRIG_EXT;
 419         /*  if board supports burst mode */
 420         if (board->size > 0x400)
 421                 mask |= TRIG_NOW;
 422         err |= cfc_check_trigger_src(&cmd->convert_src, mask);
 423
 424         err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
 425         err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
 426
 427         if (err)
 428                 return 1;
 429
 430         /* Step 2a : make sure trigger sources are unique */
 431
 432         err |= cfc_check_trigger_is_unique(cmd->scan_begin_src);
 433         err |= cfc_check_trigger_is_unique(cmd->convert_src);
 434         err |= cfc_check_trigger_is_unique(cmd->stop_src);
 435
 436         /* Step 2b : and mutually compatible */
 437
 438         /*  make sure scan_begin_src and convert_src dont conflict */
 439         if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW)
 440                 err |= -EINVAL;
 441         if (cmd->scan_begin_src != TRIG_FOLLOW && cmd->convert_src != TRIG_NOW)
 442                 err |= -EINVAL;
 443
 444         if (err)
 445                 return 2;
 446
 447         /* Step 3: check if arguments are trivially valid */
 448
 449         err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
 450
 451         if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
 452                 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 453
 454         err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
 455
 456         /* check against maximum frequency */
 457         if (cmd->scan_begin_src == TRIG_TIMER)
 458                 err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
 459                                         board->ai_speed * cmd->chanlist_len);
 460
 461         if (cmd->convert_src == TRIG_TIMER)
 462                 err |= cfc_check_trigger_arg_min(&cmd->convert_arg,
 463                                                  board->ai_speed);
 464
 465         if (cmd->stop_src == TRIG_NONE)
 466                 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
 467
 468         if (err)
 469                 return 3;
 470
 471         /*  step 4: fix up arguments */
 472         if (cmd->scan_begin_src == TRIG_TIMER) {
 473                 unsigned int tmp = cmd->scan_begin_arg;
 474                 /*  set divisors, correct timing arguments */
 475                 i8253_cascade_ns_to_timer_2div(devpriv->clockbase,
 476                                                &(devpriv->divisor1),
 477                                                &(devpriv->divisor2),
 478                                                &(cmd->scan_begin_arg),
 479                                                cmd->flags & TRIG_ROUND_MASK);
 480                 err += (tmp != cmd->scan_begin_arg);
 481         }
 482         if (cmd->convert_src == TRIG_TIMER) {
 483                 unsigned int tmp = cmd->convert_arg;
 484                 /*  set divisors, correct timing arguments */
 485                 i8253_cascade_ns_to_timer_2div(devpriv->clockbase,
 486                                                &(devpriv->divisor1),
 487                                                &(devpriv->divisor2),
 488                                                &(cmd->convert_arg),
 489                                                cmd->flags & TRIG_ROUND_MASK);
 490                 err += (tmp != cmd->convert_arg);
 491         }
 492         if (err)
 493                 return 4;
 494
 495         /*  check channel/gain list against card's limitations */
 496         if (cmd->chanlist) {
 497                 gain = CR_RANGE(cmd->chanlist[0]);
 498                 start_chan = CR_CHAN(cmd->chanlist[0]);
 499                 for (i = 1; i < cmd->chanlist_len; i++) {
 500                         if (CR_CHAN(cmd->chanlist[i]) !=
 501                             (start_chan + i) % s->n_chan) {
 502                                 comedi_error(dev,
 503                                                 "entries in chanlist must be "
 504                                                 "consecutive channels, "
 505                                                 "counting upwards\n");
 506                                 err++;
 507                         }
 508                         if (CR_RANGE(cmd->chanlist[i]) != gain) {
 509                                 comedi_error(dev,
 510                                                 "entries in chanlist must all "
 511                                                 "have the same gain\n");
 512                                 err++;
 513                         }
 514                 }
 515         }
 516         if (err)
 517                 return 5;
 518
 519         return 0;
 520 }
 521
 522 /* utility function that suggests a dma transfer size in bytes */
 523 static unsigned int das16_suggest_transfer_size(struct comedi_device *dev,
 524                                                 const struct comedi_cmd *cmd)
 525 {
 526         struct das16_private_struct *devpriv = dev->private;
 527         unsigned int size;
 528         unsigned int freq;
 529
 530         /* if we are using timer interrupt, we don't care how long it
 531          * will take to complete transfer since it will be interrupted
 532          * by timer interrupt */
 533         if (devpriv->timer_mode)
 534                 return DAS16_DMA_SIZE;
 535
 536         /* otherwise, we are relying on dma terminal count interrupt,
 537          * so pick a reasonable size */
 538         if (cmd->convert_src == TRIG_TIMER)
 539                 freq = 1000000000 / cmd->convert_arg;
 540         else if (cmd->scan_begin_src == TRIG_TIMER)
 541                 freq = (1000000000 / cmd->scan_begin_arg) * cmd->chanlist_len;
 542         /*  return some default value */
 543         else
 544                 freq = 0xffffffff;
 545
 546         if (cmd->flags & TRIG_WAKE_EOS) {
 547                 size = sample_size * cmd->chanlist_len;
 548         } else {
 549                 /*  make buffer fill in no more than 1/3 second */
 550                 size = (freq / 3) * sample_size;
 551         }
 552
 553         /*  set a minimum and maximum size allowed */
 554         if (size > DAS16_DMA_SIZE)
 555                 size = DAS16_DMA_SIZE - DAS16_DMA_SIZE % sample_size;
 556         else if (size < sample_size)
 557                 size = sample_size;
 558
 559         if (cmd->stop_src == TRIG_COUNT && size > devpriv->adc_byte_count)
 560                 size = devpriv->adc_byte_count;
 561
 562         return size;
 563 }
 564
 565 static unsigned int das16_set_pacer(struct comedi_device *dev, unsigned int ns,
 566                                     int rounding_flags)
 567 {
 568         struct das16_private_struct *devpriv = dev->private;
 569
 570         i8253_cascade_ns_to_timer_2div(devpriv->clockbase, &(devpriv->divisor1),
 571                                        &(devpriv->divisor2), &ns,
 572                                        rounding_flags & TRIG_ROUND_MASK);
 573
 574         /* Write the values of ctr1 and ctr2 into counters 1 and 2 */
 575         i8254_load(dev->iobase + DAS16_CNTR0_DATA, 0, 1, devpriv->divisor1, 2);
 576         i8254_load(dev->iobase + DAS16_CNTR0_DATA, 0, 2, devpriv->divisor2, 2);
 577
 578         return ns;
 579 }
 580
 581 static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s)
 582 {
 583         const struct das16_board *board = comedi_board(dev);
 584         struct das16_private_struct *devpriv = dev->private;
 585         struct comedi_async *async = s->async;
 586         struct comedi_cmd *cmd = &async->cmd;
 587         unsigned int byte;
 588         unsigned long flags;
 589         int range;
 590
 591         if (devpriv->dma_chan == 0 || (dev->irq == 0
 592                                        && devpriv->timer_mode == 0)) {
 593                 comedi_error(dev,
 594                                 "irq (or use of 'timer mode') dma required to "
 595                                                         "execute comedi_cmd");
 596                 return -1;
 597         }
 598         if (cmd->flags & TRIG_RT) {
 599                 comedi_error(dev, "isa dma transfers cannot be performed with "
 600                                                         "TRIG_RT, aborting");
 601                 return -1;
 602         }
 603
 604         devpriv->adc_byte_count =
 605             cmd->stop_arg * cmd->chanlist_len * sizeof(uint16_t);
 606
 607         /*  disable conversions for das1600 mode */
 608         if (board->size > 0x400)
 609                 outb(DAS1600_CONV_DISABLE, dev->iobase + DAS1600_CONV);
 610
 611         /*  set scan limits */
 612         byte = CR_CHAN(cmd->chanlist[0]);
 613         byte |= CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]) << 4;
 614         outb(byte, dev->iobase + DAS16_MUX);
 615
 616         /* set gain (this is also burst rate register but according to
 617          * computer boards manual, burst rate does nothing, even on
 618          * keithley cards) */
 619         if (board->ai_pg != das16_pg_none) {
 620                 range = CR_RANGE(cmd->chanlist[0]);
 621                 outb((das16_gainlists[board->ai_pg])[range],
 622                      dev->iobase + DAS16_GAIN);
 623         }
 624
 625         /* set counter mode and counts */
 626         cmd->convert_arg =
 627             das16_set_pacer(dev, cmd->convert_arg,
 628                             cmd->flags & TRIG_ROUND_MASK);
 629         DEBUG_PRINT("pacer period: %d ns\n", cmd->convert_arg);
 630
 631         /* enable counters */
 632         byte = 0;
 633         /* Enable burst mode if appropriate. */
 634         if (board->size > 0x400) {
 635                 if (cmd->convert_src == TRIG_NOW) {
 636                         outb(DAS1600_BURST_VAL, dev->iobase + DAS1600_BURST);
 637                         /*  set burst length */
 638                         byte |= BURST_LEN_BITS(cmd->chanlist_len - 1);
 639                 } else {
 640                         outb(0, dev->iobase + DAS1600_BURST);
 641                 }
 642         }
 643         outb(byte, dev->iobase + DAS16_PACER);
 644
 645         /*  set up dma transfer */
 646         flags = claim_dma_lock();
 647         disable_dma(devpriv->dma_chan);
 648         /* clear flip-flop to make sure 2-byte registers for
 649          * count and address get set correctly */
 650         clear_dma_ff(devpriv->dma_chan);
 651         devpriv->current_buffer = 0;
 652         set_dma_addr(devpriv->dma_chan,
 653                      devpriv->dma_buffer_addr[devpriv->current_buffer]);
 654         /*  set appropriate size of transfer */
 655         devpriv->dma_transfer_size = das16_suggest_transfer_size(dev, cmd);
 656         set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size);
 657         enable_dma(devpriv->dma_chan);
 658         release_dma_lock(flags);
 659
 660         /*  set up interrupt */
 661         if (devpriv->timer_mode) {
 662                 devpriv->timer_running = 1;
 663                 devpriv->timer.expires = jiffies + timer_period();
 664                 add_timer(&devpriv->timer);
 665                 devpriv->control_state &= ~DAS16_INTE;
 666         } else {
 667                 /* clear interrupt bit */
 668                 outb(0x00, dev->iobase + DAS16_STATUS);
 669                 /* enable interrupts */
 670                 devpriv->control_state |= DAS16_INTE;
 671         }
 672         devpriv->control_state |= DMA_ENABLE;
 673         devpriv->control_state &= ~PACING_MASK;
 674         if (cmd->convert_src == TRIG_EXT)
 675                 devpriv->control_state |= EXT_PACER;
 676         else
 677                 devpriv->control_state |= INT_PACER;
 678         outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
 679
 680         /* Enable conversions if using das1600 mode */
 681         if (board->size > 0x400)
 682                 outb(0, dev->iobase + DAS1600_CONV);
 683
 684
 685         return 0;
 686 }
 687
 688 static int das16_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
 689 {
 690         const struct das16_board *board = comedi_board(dev);
 691         struct das16_private_struct *devpriv = dev->private;
 692         unsigned long flags;
 693
 694         spin_lock_irqsave(&dev->spinlock, flags);
 695         /* disable interrupts, dma and pacer clocked conversions */
 696         devpriv->control_state &= ~DAS16_INTE & ~PACING_MASK & ~DMA_ENABLE;
 697         outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
 698         if (devpriv->dma_chan)
 699                 disable_dma(devpriv->dma_chan);
 700
 701         /*  disable SW timer */
 702         if (devpriv->timer_mode && devpriv->timer_running) {
 703                 devpriv->timer_running = 0;
 704                 del_timer(&devpriv->timer);
 705         }
 706
 707         /* disable burst mode */
 708         if (board->size > 0x400)
 709                 outb(0, dev->iobase + DAS1600_BURST);
 710
 711
 712         spin_unlock_irqrestore(&dev->spinlock, flags);
 713
 714         return 0;
 715 }
 716
 717 static void das16_reset(struct comedi_device *dev)
 718 {
 719         outb(0, dev->iobase + DAS16_STATUS);
 720         outb(0, dev->iobase + DAS16_CONTROL);
 721         outb(0, dev->iobase + DAS16_PACER);
 722         outb(0, dev->iobase + DAS16_CNTR_CONTROL);
 723 }
 724
 725 static int das16_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
 726                           struct comedi_insn *insn, unsigned int *data)
 727 {
 728         const struct das16_board *board = comedi_board(dev);
 729         struct das16_private_struct *devpriv = dev->private;
 730         int i, n;
 731         int range;
 732         int chan;
 733         int msb, lsb;
 734
 735         /*  disable interrupts and pacing */
 736         devpriv->control_state &= ~DAS16_INTE & ~DMA_ENABLE & ~PACING_MASK;
 737         outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
 738
 739         /* set multiplexer */
 740         chan = CR_CHAN(insn->chanspec);
 741         chan |= CR_CHAN(insn->chanspec) << 4;
 742         outb(chan, dev->iobase + DAS16_MUX);
 743
 744         /* set gain */
 745         if (board->ai_pg != das16_pg_none) {
 746                 range = CR_RANGE(insn->chanspec);
 747                 outb((das16_gainlists[board->ai_pg])[range],
 748                      dev->iobase + DAS16_GAIN);
 749         }
 750
 751         for (n = 0; n < insn->n; n++) {
 752                 /* trigger conversion */
 753                 outb_p(0, dev->iobase + DAS16_TRIG);
 754
 755                 for (i = 0; i < DAS16_TIMEOUT; i++) {
 756                         if (!(inb(dev->iobase + DAS16_STATUS) & BUSY))
 757                                 break;
 758                 }
 759                 if (i == DAS16_TIMEOUT) {
 760                         printk("das16: timeout\n");
 761                         return -ETIME;
 762                 }
 763                 msb = inb(dev->iobase + DAS16_AI_MSB);
 764                 lsb = inb(dev->iobase + DAS16_AI_LSB);
 765                 if (board->ai_nbits == 12)
 766                         data[n] = ((lsb >> 4) & 0xf) | (msb << 4);
 767                 else
 768                         data[n] = lsb | (msb << 8);
 769
 770         }
 771
 772         return n;
 773 }
 774
 775 static int das16_di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
 776                           struct comedi_insn *insn, unsigned int *data)
 777 {
 778         unsigned int bits;
 779
 780         bits = inb(dev->iobase + DAS16_DIO) & 0xf;
 781         data[1] = bits;
 782         data[0] = 0;
 783
 784         return insn->n;
 785 }
 786
 787 static int das16_do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
 788                           struct comedi_insn *insn, unsigned int *data)
 789 {
 790         unsigned int wbits;
 791
 792         /*  only set bits that have been masked */
 793         data[0] &= 0xf;
 794         wbits = s->state;
 795         /*  zero bits that have been masked */
 796         wbits &= ~data[0];
 797         /*  set masked bits */
 798         wbits |= data[0] & data[1];
 799         s->state = wbits;
 800         data[1] = wbits;
 801
 802         outb(s->state, dev->iobase + DAS16_DIO);
 803
 804         return insn->n;
 805 }
 806
 807 static int das16_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
 808                           struct comedi_insn *insn, unsigned int *data)
 809 {
 810         const struct das16_board *board = comedi_board(dev);
 811         int i;
 812         int lsb, msb;
 813         int chan;
 814
 815         chan = CR_CHAN(insn->chanspec);
 816
 817         for (i = 0; i < insn->n; i++) {
 818                 if (board->ao_nbits == 12) {
 819                         lsb = (data[i] << 4) & 0xff;
 820                         msb = (data[i] >> 4) & 0xff;
 821                 } else {
 822                         lsb = data[i] & 0xff;
 823                         msb = (data[i] >> 8) & 0xff;
 824                 }
 825                 outb(lsb, dev->iobase + DAS16_AO_LSB(chan));
 826                 outb(msb, dev->iobase + DAS16_AO_MSB(chan));
 827         }
 828
 829         return i;
 830 }
 831
 832 /* the pc104-das16jr (at least) has problems if the dma
 833         transfer is interrupted in the middle of transferring
 834         a 16 bit sample, so this function takes care to get
 835         an even transfer count after disabling dma
 836         channel.
 837 */
 838 static int disable_dma_on_even(struct comedi_device *dev)
 839 {
 840         struct das16_private_struct *devpriv = dev->private;
 841         int residue;
 842         int i;
 843         static const int disable_limit = 100;
 844         static const int enable_timeout = 100;
 845
 846         disable_dma(devpriv->dma_chan);
 847         residue = get_dma_residue(devpriv->dma_chan);
 848         for (i = 0; i < disable_limit && (residue % 2); ++i) {
 849                 int j;
 850                 enable_dma(devpriv->dma_chan);
 851                 for (j = 0; j < enable_timeout; ++j) {
 852                         int new_residue;
 853                         udelay(2);
 854                         new_residue = get_dma_residue(devpriv->dma_chan);
 855                         if (new_residue != residue)
 856                                 break;
 857                 }
 858                 disable_dma(devpriv->dma_chan);
 859                 residue = get_dma_residue(devpriv->dma_chan);
 860         }
 861         if (i == disable_limit) {
 862                 comedi_error(dev, "failed to get an even dma transfer, "
 863                                                         "could be trouble.");
 864         }
 865         return residue;
 866 }
 867
 868 static void das16_interrupt(struct comedi_device *dev)
 869 {
 870         const struct das16_board *board = comedi_board(dev);
 871         struct das16_private_struct *devpriv = dev->private;
 872         unsigned long dma_flags, spin_flags;
 873         struct comedi_subdevice *s = dev->read_subdev;
 874         struct comedi_async *async;
 875         struct comedi_cmd *cmd;
 876         int num_bytes, residue;
 877         int buffer_index;
 878
 879         if (dev->attached == 0) {
 880                 comedi_error(dev, "premature interrupt");
 881                 return;
 882         }
 883         /*  initialize async here to make sure it is not NULL */
 884         async = s->async;
 885         cmd = &async->cmd;
 886
 887         if (devpriv->dma_chan == 0) {
 888                 comedi_error(dev, "interrupt with no dma channel?");
 889                 return;
 890         }
 891
 892         spin_lock_irqsave(&dev->spinlock, spin_flags);
 893         if ((devpriv->control_state & DMA_ENABLE) == 0) {
 894                 spin_unlock_irqrestore(&dev->spinlock, spin_flags);
 895                 DEBUG_PRINT("interrupt while dma disabled?\n");
 896                 return;
 897         }
 898
 899         dma_flags = claim_dma_lock();
 900         clear_dma_ff(devpriv->dma_chan);
 901         residue = disable_dma_on_even(dev);
 902
 903         /*  figure out how many points to read */
 904         if (residue > devpriv->dma_transfer_size) {
 905                 comedi_error(dev, "residue > transfer size!\n");
 906                 async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
 907                 num_bytes = 0;
 908         } else
 909                 num_bytes = devpriv->dma_transfer_size - residue;
 910
 911         if (cmd->stop_src == TRIG_COUNT &&
 912                                         num_bytes >= devpriv->adc_byte_count) {
 913                 num_bytes = devpriv->adc_byte_count;
 914                 async->events |= COMEDI_CB_EOA;
 915         }
 916
 917         buffer_index = devpriv->current_buffer;
 918         devpriv->current_buffer = (devpriv->current_buffer + 1) % 2;
 919         devpriv->adc_byte_count -= num_bytes;
 920
 921         /*  figure out how many bytes for next transfer */
 922         if (cmd->stop_src == TRIG_COUNT && devpriv->timer_mode == 0 &&
 923             devpriv->dma_transfer_size > devpriv->adc_byte_count)
 924                 devpriv->dma_transfer_size = devpriv->adc_byte_count;
 925
 926         /*  re-enable  dma */
 927         if ((async->events & COMEDI_CB_EOA) == 0) {
 928                 set_dma_addr(devpriv->dma_chan,
 929                              devpriv->dma_buffer_addr[devpriv->current_buffer]);
 930                 set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size);
 931                 enable_dma(devpriv->dma_chan);
 932                 /* reenable conversions for das1600 mode, (stupid hardware) */
 933                 if (board->size > 0x400 && devpriv->timer_mode == 0)
 934                         outb(0x00, dev->iobase + DAS1600_CONV);
 935
 936         }
 937         release_dma_lock(dma_flags);
 938
 939         spin_unlock_irqrestore(&dev->spinlock, spin_flags);
 940
 941         cfc_write_array_to_buffer(s,
 942                                   devpriv->dma_buffer[buffer_index], num_bytes);
 943
 944         cfc_handle_events(dev, s);
 945 }
 946
 947 static irqreturn_t das16_dma_interrupt(int irq, void *d)
 948 {
 949         int status;
 950         struct comedi_device *dev = d;
 951
 952         status = inb(dev->iobase + DAS16_STATUS);
 953
 954         if ((status & DAS16_INT) == 0) {
 955                 DEBUG_PRINT("spurious interrupt\n");
 956                 return IRQ_NONE;
 957         }
 958
 959         /* clear interrupt */
 960         outb(0x00, dev->iobase + DAS16_STATUS);
 961         das16_interrupt(dev);
 962         return IRQ_HANDLED;
 963 }
 964
 965 static void das16_timer_interrupt(unsigned long arg)
 966 {
 967         struct comedi_device *dev = (struct comedi_device *)arg;
 968         struct das16_private_struct *devpriv = dev->private;
 969
 970         das16_interrupt(dev);
 971
 972         if (devpriv->timer_running)
 973                 mod_timer(&devpriv->timer, jiffies + timer_period());
 974 }
 975
 976 static void reg_dump(struct comedi_device *dev)
 977 {
 978         DEBUG_PRINT("********DAS1600 REGISTER DUMP********\n");
 979         DEBUG_PRINT("DAS16_MUX: %x\n", inb(dev->iobase + DAS16_MUX));
 980         DEBUG_PRINT("DAS16_DIO: %x\n", inb(dev->iobase + DAS16_DIO));
 981         DEBUG_PRINT("DAS16_STATUS: %x\n", inb(dev->iobase + DAS16_STATUS));
 982         DEBUG_PRINT("DAS16_CONTROL: %x\n", inb(dev->iobase + DAS16_CONTROL));
 983         DEBUG_PRINT("DAS16_PACER: %x\n", inb(dev->iobase + DAS16_PACER));
 984         DEBUG_PRINT("DAS16_GAIN: %x\n", inb(dev->iobase + DAS16_GAIN));
 985         DEBUG_PRINT("DAS16_CNTR_CONTROL: %x\n",
 986                     inb(dev->iobase + DAS16_CNTR_CONTROL));
 987         DEBUG_PRINT("DAS1600_CONV: %x\n", inb(dev->iobase + DAS1600_CONV));
 988         DEBUG_PRINT("DAS1600_BURST: %x\n", inb(dev->iobase + DAS1600_BURST));
 989         DEBUG_PRINT("DAS1600_ENABLE: %x\n", inb(dev->iobase + DAS1600_ENABLE));
 990         DEBUG_PRINT("DAS1600_STATUS_B: %x\n",
 991                     inb(dev->iobase + DAS1600_STATUS_B));
 992 }
 993
 994 static int das16_probe(struct comedi_device *dev, struct comedi_devconfig *it)
 995 {
 996         const struct das16_board *board = comedi_board(dev);
 997         struct das16_private_struct *devpriv = dev->private;
 998         int status;
 999         int diobits;
1000
1001         /* status is available on all boards */
1002
1003         status = inb(dev->iobase + DAS16_STATUS);
1004
1005         if ((status & UNIPOLAR))
1006                 devpriv->ai_unipolar = 1;
1007         else
1008                 devpriv->ai_unipolar = 0;
1009
1010
1011         if ((status & DAS16_MUXBIT))
1012                 devpriv->ai_singleended = 1;
1013         else
1014                 devpriv->ai_singleended = 0;
1015
1016
1017         /* diobits indicates boards */
1018
1019         diobits = inb(dev->iobase + DAS16_DIO) & 0xf0;
1020
1021         printk(KERN_INFO " id bits are 0x%02x\n", diobits);
1022         if (board->id != diobits) {
1023                 printk(KERN_INFO " requested board's id bits are 0x%x (ignore)\n",
1024                        board->id);
1025         }
1026
1027         return 0;
1028 }
1029
1030 static int das1600_mode_detect(struct comedi_device *dev)
1031 {
1032         struct das16_private_struct *devpriv = dev->private;
1033         int status = 0;
1034
1035         status = inb(dev->iobase + DAS1600_STATUS_B);
1036
1037         if (status & DAS1600_CLK_10MHZ) {
1038                 devpriv->clockbase = 100;
1039                 printk(KERN_INFO " 10MHz pacer clock\n");
1040         } else {
1041                 devpriv->clockbase = 1000;
1042                 printk(KERN_INFO " 1MHz pacer clock\n");
1043         }
1044
1045         reg_dump(dev);
1046
1047         return 0;
1048 }
1049
1050 static void das16_ai_munge(struct comedi_device *dev,
1051                            struct comedi_subdevice *s, void *array,
1052                            unsigned int num_bytes,
1053                            unsigned int start_chan_index)
1054 {
1055         const struct das16_board *board = comedi_board(dev);
1056         unsigned int i, num_samples = num_bytes / sizeof(short);
1057         short *data = array;
1058
1059         for (i = 0; i < num_samples; i++) {
1060                 data[i] = le16_to_cpu(data[i]);
1061                 if (board->ai_nbits == 12)
1062                         data[i] = (data[i] >> 4) & 0xfff;
1063
1064         }
1065 }
1066
1067 /*
1068  *
1069  * Options list:
1070  *   0  I/O base
1071  *   1  IRQ
1072  *   2  DMA
1073  *   3  Clock speed (in MHz)
1074  */
1075 static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1076 {
1077         const struct das16_board *board = comedi_board(dev);
1078         struct das16_private_struct *devpriv;
1079         struct comedi_subdevice *s;
1080         int ret;
1081         unsigned int irq;
1082         unsigned long iobase;
1083         unsigned int dma_chan;
1084         int timer_mode;
1085         unsigned long flags;
1086         struct comedi_krange *user_ai_range, *user_ao_range;
1087
1088         iobase = it->options[0];
1089 #if 0
1090         irq = it->options[1];
1091         timer_mode = it->options[8];
1092 #endif
1093         /* always use time_mode since using irq can drop samples while
1094          * waiting for dma done interrupt (due to hardware limitations) */
1095         irq = 0;
1096         timer_mode = 1;
1097         if (timer_mode)
1098                 irq = 0;
1099
1100         printk(KERN_INFO "comedi%d: das16:", dev->minor);
1101
1102         /*  check that clock setting is valid */
1103         if (it->options[3]) {
1104                 if (it->options[3] != 0 &&
1105                     it->options[3] != 1 && it->options[3] != 10) {
1106                         printk
1107                             ("\n Invalid option.  Master clock must be set "
1108                                                         "to 1 or 10 (MHz)\n");
1109                         return -EINVAL;
1110                 }
1111         }
1112
1113         devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
1114         if (!devpriv)
1115                 return -ENOMEM;
1116         dev->private = devpriv;
1117
1118         if (board->size < 0x400) {
1119                 printk(" 0x%04lx-0x%04lx\n", iobase, iobase + board->size);
1120                 if (!request_region(iobase, board->size, "das16")) {
1121                         printk(KERN_ERR " I/O port conflict\n");
1122                         return -EIO;
1123                 }
1124         } else {
1125                 printk(KERN_INFO " 0x%04lx-0x%04lx 0x%04lx-0x%04lx\n",
1126                        iobase, iobase + 0x0f,
1127                        iobase + 0x400,
1128                        iobase + 0x400 + (board->size & 0x3ff));
1129                 if (!request_region(iobase, 0x10, "das16")) {
1130                         printk(KERN_ERR " I/O port conflict:  0x%04lx-0x%04lx\n",
1131                                iobase, iobase + 0x0f);
1132                         return -EIO;
1133                 }
1134                 if (!request_region(iobase + 0x400, board->size & 0x3ff,
1135                                     "das16")) {
1136                         release_region(iobase, 0x10);
1137                         printk(KERN_ERR " I/O port conflict:  0x%04lx-0x%04lx\n",
1138                                iobase + 0x400,
1139                                iobase + 0x400 + (board->size & 0x3ff));
1140                         return -EIO;
1141                 }
1142         }
1143
1144         dev->iobase = iobase;
1145
1146         /*  probe id bits to make sure they are consistent */
1147         if (das16_probe(dev, it)) {
1148                 printk(KERN_ERR " id bits do not match selected board, aborting\n");
1149                 return -EINVAL;
1150         }
1151         dev->board_name = board->name;
1152
1153         /*  get master clock speed */
1154         if (board->size < 0x400) {
1155                 if (it->options[3])
1156                         devpriv->clockbase = 1000 / it->options[3];
1157                 else
1158                         devpriv->clockbase = 1000;      /*  1 MHz default */
1159         } else {
1160                 das1600_mode_detect(dev);
1161         }
1162
1163         /* now for the irq */
1164         if (irq > 1 && irq < 8) {
1165                 ret = request_irq(irq, das16_dma_interrupt, 0, "das16", dev);
1166
1167                 if (ret < 0)
1168                         return ret;
1169                 dev->irq = irq;
1170                 printk(KERN_INFO " ( irq = %u )", irq);
1171         } else if (irq == 0) {
1172                 printk(" ( no irq )");
1173         } else {
1174                 printk(" invalid irq\n");
1175                 return -EINVAL;
1176         }
1177
1178         /*  initialize dma */
1179         dma_chan = it->options[2];
1180         if (dma_chan == 1 || dma_chan == 3) {
1181                 /*  allocate dma buffers */
1182                 int i;
1183                 for (i = 0; i < 2; i++) {
1184                         devpriv->dma_buffer[i] = pci_alloc_consistent(
1185                                                 NULL, DAS16_DMA_SIZE,
1186                                                 &devpriv->dma_buffer_addr[i]);
1187
1188                         if (devpriv->dma_buffer[i] == NULL)
1189                                 return -ENOMEM;
1190                 }
1191                 if (request_dma(dma_chan, "das16")) {
1192                         printk(KERN_ERR " failed to allocate dma channel %i\n",
1193                                dma_chan);
1194                         return -EINVAL;
1195                 }
1196                 devpriv->dma_chan = dma_chan;
1197                 flags = claim_dma_lock();
1198                 disable_dma(devpriv->dma_chan);
1199                 set_dma_mode(devpriv->dma_chan, DMA_MODE_READ);
1200                 release_dma_lock(flags);
1201                 printk(KERN_INFO " ( dma = %u)\n", dma_chan);
1202         } else if (dma_chan == 0) {
1203                 printk(KERN_INFO " ( no dma )\n");
1204         } else {
1205                 printk(KERN_ERR " invalid dma channel\n");
1206                 return -EINVAL;
1207         }
1208
1209         /*  get any user-defined input range */
1210         if (board->ai_pg == das16_pg_none &&
1211             (it->options[4] || it->options[5])) {
1212                 /*  allocate single-range range table */
1213                 devpriv->user_ai_range_table =
1214                     kmalloc(sizeof(struct comedi_lrange) +
1215                             sizeof(struct comedi_krange), GFP_KERNEL);
1216                 /*  initialize ai range */
1217                 devpriv->user_ai_range_table->length = 1;
1218                 user_ai_range = devpriv->user_ai_range_table->range;
1219                 user_ai_range->min = it->options[4];
1220                 user_ai_range->max = it->options[5];
1221                 user_ai_range->flags = UNIT_volt;
1222         }
1223         /*  get any user-defined output range */
1224         if (it->options[6] || it->options[7]) {
1225                 /*  allocate single-range range table */
1226                 devpriv->user_ao_range_table =
1227                     kmalloc(sizeof(struct comedi_lrange) +
1228                             sizeof(struct comedi_krange), GFP_KERNEL);
1229                 /*  initialize ao range */
1230                 devpriv->user_ao_range_table->length = 1;
1231                 user_ao_range = devpriv->user_ao_range_table->range;
1232                 user_ao_range->min = it->options[6];
1233                 user_ao_range->max = it->options[7];
1234                 user_ao_range->flags = UNIT_volt;
1235         }
1236
1237         if (timer_mode) {
1238                 init_timer(&(devpriv->timer));
1239                 devpriv->timer.function = das16_timer_interrupt;
1240                 devpriv->timer.data = (unsigned long)dev;
1241         }
1242         devpriv->timer_mode = timer_mode ? 1 : 0;
1243
1244         ret = comedi_alloc_subdevices(dev, 5);
1245         if (ret)
1246                 return ret;
1247
1248         s = &dev->subdevices[0];
1249         dev->read_subdev = s;
1250         /* ai */
1251         if (board->ai) {
1252                 s->type = COMEDI_SUBD_AI;
1253                 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
1254                 if (devpriv->ai_singleended) {
1255                         s->n_chan = 16;
1256                         s->len_chanlist = 16;
1257                         s->subdev_flags |= SDF_GROUND;
1258                 } else {
1259                         s->n_chan = 8;
1260                         s->len_chanlist = 8;
1261                         s->subdev_flags |= SDF_DIFF;
1262                 }
1263                 s->maxdata = (1 << board->ai_nbits) - 1;
1264                 if (devpriv->user_ai_range_table) { /*  user defined ai range */
1265                         s->range_table = devpriv->user_ai_range_table;
1266                 } else if (devpriv->ai_unipolar) {
1267                         s->range_table = das16_ai_uni_lranges[board->ai_pg];
1268                 } else {
1269                         s->range_table = das16_ai_bip_lranges[board->ai_pg];
1270                 }
1271                 s->insn_read = board->ai;
1272                 s->do_cmdtest = das16_cmd_test;
1273                 s->do_cmd = das16_cmd_exec;
1274                 s->cancel = das16_cancel;
1275                 s->munge = das16_ai_munge;
1276         } else {
1277                 s->type = COMEDI_SUBD_UNUSED;
1278         }
1279
1280         s = &dev->subdevices[1];
1281         /* ao */
1282         if (board->ao) {
1283                 s->type = COMEDI_SUBD_AO;
1284                 s->subdev_flags = SDF_WRITABLE;
1285                 s->n_chan = 2;
1286                 s->maxdata = (1 << board->ao_nbits) - 1;
1287                 /*  user defined ao range */
1288                 if (devpriv->user_ao_range_table)
1289                         s->range_table = devpriv->user_ao_range_table;
1290                 else
1291                         s->range_table = &range_unknown;
1292
1293                 s->insn_write = board->ao;
1294         } else {
1295                 s->type = COMEDI_SUBD_UNUSED;
1296         }
1297
1298         s = &dev->subdevices[2];
1299         /* di */
1300         if (board->di) {
1301                 s->type = COMEDI_SUBD_DI;
1302                 s->subdev_flags = SDF_READABLE;
1303                 s->n_chan = 4;
1304                 s->maxdata = 1;
1305                 s->range_table = &range_digital;
1306                 s->insn_bits = board->di;
1307         } else {
1308                 s->type = COMEDI_SUBD_UNUSED;
1309         }
1310
1311         s = &dev->subdevices[3];
1312         /* do */
1313         if (board->do_) {
1314                 s->type = COMEDI_SUBD_DO;
1315                 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1316                 s->n_chan = 4;
1317                 s->maxdata = 1;
1318                 s->range_table = &range_digital;
1319                 s->insn_bits = board->do_;
1320                 /*  initialize digital output lines */
1321                 outb(s->state, dev->iobase + DAS16_DIO);
1322         } else {
1323                 s->type = COMEDI_SUBD_UNUSED;
1324         }
1325
1326         s = &dev->subdevices[4];
1327         /* 8255 */
1328         if (board->i8255_offset != 0) {
1329                 subdev_8255_init(dev, s, NULL, (dev->iobase +
1330                                                 board->i8255_offset));
1331         } else {
1332                 s->type = COMEDI_SUBD_UNUSED;
1333         }
1334
1335         das16_reset(dev);
1336         /* set the interrupt level */
1337         devpriv->control_state = DAS16_IRQ(dev->irq);
1338         outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
1339
1340         /*  turn on das1600 mode if available */
1341         if (board->size > 0x400) {
1342                 outb(DAS1600_ENABLE_VAL, dev->iobase + DAS1600_ENABLE);
1343                 outb(0, dev->iobase + DAS1600_CONV);
1344                 outb(0, dev->iobase + DAS1600_BURST);
1345         }
1346
1347         return 0;
1348 }
1349
1350 static void das16_detach(struct comedi_device *dev)
1351 {
1352         const struct das16_board *board = comedi_board(dev);
1353         struct das16_private_struct *devpriv = dev->private;
1354
1355         das16_reset(dev);
1356         if (dev->subdevices)
1357                 subdev_8255_cleanup(dev, &dev->subdevices[4]);
1358         if (devpriv) {
1359                 int i;
1360                 for (i = 0; i < 2; i++) {
1361                         if (devpriv->dma_buffer[i])
1362                                 pci_free_consistent(NULL, DAS16_DMA_SIZE,
1363                                                     devpriv->dma_buffer[i],
1364                                                     devpriv->
1365                                                     dma_buffer_addr[i]);
1366                 }
1367                 if (devpriv->dma_chan)
1368                         free_dma(devpriv->dma_chan);
1369                 kfree(devpriv->user_ai_range_table);
1370                 kfree(devpriv->user_ao_range_table);
1371         }
1372         if (dev->irq)
1373                 free_irq(dev->irq, dev);
1374         if (dev->iobase) {
1375                 if (board->size < 0x400) {
1376                         release_region(dev->iobase, board->size);
1377                 } else {
1378                         release_region(dev->iobase, 0x10);
1379                         release_region(dev->iobase + 0x400,
1380                                        board->size & 0x3ff);
1381                 }
1382         }
1383 }
1384
1385 static const struct das16_board das16_boards[] = {
1386         {
1387                 .name           = "das-16",
1388                 .ai             = das16_ai_rinsn,
1389                 .ai_nbits       = 12,
1390                 .ai_speed       = 15000,
1391                 .ai_pg          = das16_pg_none,
1392                 .ao             = das16_ao_winsn,
1393                 .ao_nbits       = 12,
1394                 .di             = das16_di_rbits,
1395                 .do_            = das16_do_wbits,
1396                 .i8255_offset   = 0x10,
1397                 .i8254_offset   = 0x0c,
1398                 .size           = 0x14,
1399                 .id             = 0x00,
1400         }, {
1401                 .name           = "das-16g",
1402                 .ai             = das16_ai_rinsn,
1403                 .ai_nbits       = 12,
1404                 .ai_speed       = 15000,
1405                 .ai_pg          = das16_pg_none,
1406                 .ao             = das16_ao_winsn,
1407                 .ao_nbits       = 12,
1408                 .di             = das16_di_rbits,
1409                 .do_            = das16_do_wbits,
1410                 .i8255_offset   = 0x10,
1411                 .i8254_offset   = 0x0c,
1412                 .size           = 0x14,
1413                 .id             = 0x00,
1414         }, {
1415                 .name           = "das-16f",
1416                 .ai             = das16_ai_rinsn,
1417                 .ai_nbits       = 12,
1418                 .ai_speed       = 8500,
1419                 .ai_pg          = das16_pg_none,
1420                 .ao             = das16_ao_winsn,
1421                 .ao_nbits       = 12,
1422                 .di             = das16_di_rbits,
1423                 .do_            = das16_do_wbits,
1424                 .i8255_offset   = 0x10,
1425                 .i8254_offset   = 0x0c,
1426                 .size           = 0x14,
1427                 .id             = 0x00,
1428         }, {
1429                 .name           = "cio-das16",
1430                 .ai             = das16_ai_rinsn,
1431                 .ai_nbits       = 12,
1432                 .ai_speed       = 20000,
1433                 .ai_pg          = das16_pg_none,
1434                 .ao             = das16_ao_winsn,
1435                 .ao_nbits       = 12,
1436                 .di             = das16_di_rbits,
1437                 .do_            = das16_do_wbits,
1438                 .i8255_offset   = 0x10,
1439                 .i8254_offset   = 0x0c,
1440                 .size           = 0x14,
1441                 .id             = 0x80,
1442         }, {
1443                 .name           = "cio-das16/f",
1444                 .ai             = das16_ai_rinsn,
1445                 .ai_nbits       = 12,
1446                 .ai_speed       = 10000,
1447                 .ai_pg          = das16_pg_none,
1448                 .ao             = das16_ao_winsn,
1449                 .ao_nbits       = 12,
1450                 .di             = das16_di_rbits,
1451                 .do_            = das16_do_wbits,
1452                 .i8255_offset   = 0x10,
1453                 .i8254_offset   = 0x0c,
1454                 .size           = 0x14,
1455                 .id             = 0x80,
1456         }, {
1457                 .name           = "cio-das16/jr",
1458                 .ai             = das16_ai_rinsn,
1459                 .ai_nbits       = 12,
1460                 .ai_speed       = 7692,
1461                 .ai_pg          = das16_pg_16jr,
1462                 .ao             = NULL,
1463                 .di             = das16_di_rbits,
1464                 .do_            = das16_do_wbits,
1465                 .i8255_offset   = 0,
1466                 .i8254_offset   = 0x0c,
1467                 .size           = 0x10,
1468                 .id             = 0x00,
1469         }, {
1470                 .name           = "pc104-das16jr",
1471                 .ai             = das16_ai_rinsn,
1472                 .ai_nbits       = 12,
1473                 .ai_speed       = 3300,
1474                 .ai_pg          = das16_pg_16jr,
1475                 .ao             = NULL,
1476                 .di             = das16_di_rbits,
1477                 .do_            = das16_do_wbits,
1478                 .i8255_offset   = 0,
1479                 .i8254_offset   = 0x0c,
1480                 .size           = 0x10,
1481                 .id             = 0x00,
1482         }, {
1483                 .name           = "cio-das16jr/16",
1484                 .ai             = das16_ai_rinsn,
1485                 .ai_nbits       = 16,
1486                 .ai_speed       = 10000,
1487                 .ai_pg          = das16_pg_16jr_16,
1488                 .ao             = NULL,
1489                 .di             = das16_di_rbits,
1490                 .do_            = das16_do_wbits,
1491                 .i8255_offset   = 0,
1492                 .i8254_offset   = 0x0c,
1493                 .size           = 0x10,
1494                 .id             = 0x00,
1495         }, {
1496                 .name           = "pc104-das16jr/16",
1497                 .ai             = das16_ai_rinsn,
1498                 .ai_nbits       = 16,
1499                 .ai_speed       = 10000,
1500                 .ai_pg          = das16_pg_16jr_16,
1501                 .ao             = NULL,
1502                 .di             = das16_di_rbits,
1503                 .do_            = das16_do_wbits,
1504                 .i8255_offset   = 0,
1505                 .i8254_offset   = 0x0c,
1506                 .size           = 0x10,
1507                 .id             = 0x00,
1508         }, {
1509                 .name           = "das-1201",
1510                 .ai             = das16_ai_rinsn,
1511                 .ai_nbits       = 12,
1512                 .ai_speed       = 20000,
1513                 .ai_pg          = das16_pg_none,
1514                 .ao             = NULL,
1515                 .di             = das16_di_rbits,
1516                 .do_            = das16_do_wbits,
1517                 .i8255_offset   = 0x400,
1518                 .i8254_offset   = 0x0c,
1519                 .size           = 0x408,
1520                 .id             = 0x20,
1521         }, {
1522                 .name           = "das-1202",
1523                 .ai             = das16_ai_rinsn,
1524                 .ai_nbits       = 12,
1525                 .ai_speed       = 10000,
1526                 .ai_pg          = das16_pg_none,
1527                 .ao             = NULL,
1528                 .di             = das16_di_rbits,
1529                 .do_            = das16_do_wbits,
1530                 .i8255_offset   = 0x400,
1531                 .i8254_offset   = 0x0c,
1532                 .size           = 0x408,
1533                 .id             = 0x20,
1534         }, {
1535                 .name           = "das-1401",
1536                 .ai             = das16_ai_rinsn,
1537                 .ai_nbits       = 12,
1538                 .ai_speed       = 10000,
1539                 .ai_pg          = das16_pg_1601,
1540                 .ao             = NULL,
1541                 .di             = das16_di_rbits,
1542                 .do_            = das16_do_wbits,
1543                 .i8255_offset   = 0x0,
1544                 .i8254_offset   = 0x0c,
1545                 .size           = 0x408,
1546                 .id             = 0xc0,
1547         }, {
1548                 .name           = "das-1402",
1549                 .ai             = das16_ai_rinsn,
1550                 .ai_nbits       = 12,
1551                 .ai_speed       = 10000,
1552                 .ai_pg          = das16_pg_1602,
1553                 .ao             = NULL,
1554                 .di             = das16_di_rbits,
1555                 .do_            = das16_do_wbits,
1556                 .i8255_offset   = 0x0,
1557                 .i8254_offset   = 0x0c,
1558                 .size           = 0x408,
1559                 .id             = 0xc0,
1560         }, {
1561                 .name           = "das-1601",
1562                 .ai             = das16_ai_rinsn,
1563                 .ai_nbits       = 12,
1564                 .ai_speed       = 10000,
1565                 .ai_pg          = das16_pg_1601,
1566                 .ao             = das16_ao_winsn,
1567                 .ao_nbits       = 12,
1568                 .di             = das16_di_rbits,
1569                 .do_            = das16_do_wbits,
1570                 .i8255_offset   = 0x400,
1571                 .i8254_offset   = 0x0c,
1572                 .size           = 0x408,
1573                 .id             = 0xc0,
1574         }, {
1575                 .name           = "das-1602",
1576                 .ai             = das16_ai_rinsn,
1577                 .ai_nbits       = 12,
1578                 .ai_speed       = 10000,
1579                 .ai_pg          = das16_pg_1602,
1580                 .ao             = das16_ao_winsn,
1581                 .ao_nbits       = 12,
1582                 .di             = das16_di_rbits,
1583                 .do_            = das16_do_wbits,
1584                 .i8255_offset   = 0x400,
1585                 .i8254_offset   = 0x0c,
1586                 .size           = 0x408,
1587                 .id             = 0xc0,
1588         }, {
1589                 .name           = "cio-das1401/12",
1590                 .ai             = das16_ai_rinsn,
1591                 .ai_nbits       = 12,
1592                 .ai_speed       = 6250,
1593                 .ai_pg          = das16_pg_1601,
1594                 .ao             = NULL,
1595                 .di             = das16_di_rbits,
1596                 .do_            = das16_do_wbits,
1597                 .i8255_offset   = 0,
1598                 .i8254_offset   = 0x0c,
1599                 .size           = 0x408,
1600                 .id             = 0xc0,
1601         }, {
1602                 .name           = "cio-das1402/12",
1603                 .ai             = das16_ai_rinsn,
1604                 .ai_nbits       = 12,
1605                 .ai_speed       = 6250,
1606                 .ai_pg          = das16_pg_1602,
1607                 .ao             = NULL,
1608                 .di             = das16_di_rbits,
1609                 .do_            = das16_do_wbits,
1610                 .i8255_offset   = 0,
1611                 .i8254_offset   = 0x0c,
1612                 .size           = 0x408,
1613                 .id             = 0xc0,
1614         }, {
1615                 .name           = "cio-das1402/16",
1616                 .ai             = das16_ai_rinsn,
1617                 .ai_nbits       = 16,
1618                 .ai_speed       = 10000,
1619                 .ai_pg          = das16_pg_1602,
1620                 .ao             = NULL,
1621                 .di             = das16_di_rbits,
1622                 .do_            = das16_do_wbits,
1623                 .i8255_offset   = 0,
1624                 .i8254_offset   = 0x0c,
1625                 .size           = 0x408,
1626                 .id             = 0xc0,
1627         }, {
1628                 .name           = "cio-das1601/12",
1629                 .ai             = das16_ai_rinsn,
1630                 .ai_nbits       = 12,
1631                 .ai_speed       = 6250,
1632                 .ai_pg          = das16_pg_1601,
1633                 .ao             = das16_ao_winsn,
1634                 .ao_nbits       = 12,
1635                 .di             = das16_di_rbits,
1636                 .do_            = das16_do_wbits,
1637                 .i8255_offset   = 0x400,
1638                 .i8254_offset   = 0x0c,
1639                 .size           = 0x408,
1640                 .id             = 0xc0,
1641         }, {
1642                 .name           = "cio-das1602/12",
1643                 .ai             = das16_ai_rinsn,
1644                 .ai_nbits       = 12,
1645                 .ai_speed       = 10000,
1646                 .ai_pg          = das16_pg_1602,
1647                 .ao             = das16_ao_winsn,
1648                 .ao_nbits       = 12,
1649                 .di             = das16_di_rbits,
1650                 .do_            = das16_do_wbits,
1651                 .i8255_offset   = 0x400,
1652                 .i8254_offset   = 0x0c,
1653                 .size           = 0x408,
1654                 .id             = 0xc0,
1655         }, {
1656                 .name           = "cio-das1602/16",
1657                 .ai             = das16_ai_rinsn,
1658                 .ai_nbits       = 16,
1659                 .ai_speed       = 10000,
1660                 .ai_pg          = das16_pg_1602,
1661                 .ao             = das16_ao_winsn,
1662                 .ao_nbits       = 12,
1663                 .di             = das16_di_rbits,
1664                 .do_            = das16_do_wbits,
1665                 .i8255_offset   = 0x400,
1666                 .i8254_offset   = 0x0c,
1667                 .size           = 0x408,
1668                 .id             = 0xc0,
1669         }, {
1670                 .name           = "cio-das16/330",
1671                 .ai             = das16_ai_rinsn,
1672                 .ai_nbits       = 12,
1673                 .ai_speed       = 3030,
1674                 .ai_pg          = das16_pg_16jr,
1675                 .ao             = NULL,
1676                 .di             = das16_di_rbits,
1677                 .do_            = das16_do_wbits,
1678                 .i8255_offset   = 0,
1679                 .i8254_offset   = 0x0c,
1680                 .size           = 0x14,
1681                 .id             = 0xf0,
1682         },
1683 };
1684
1685 static struct comedi_driver das16_driver = {
1686         .driver_name    = "das16",
1687         .module         = THIS_MODULE,
1688         .attach         = das16_attach,
1689         .detach         = das16_detach,
1690         .board_name     = &das16_boards[0].name,
1691         .num_names      = ARRAY_SIZE(das16_boards),
1692         .offset         = sizeof(das16_boards[0]),
1693 };
1694 module_comedi_driver(das16_driver);
1695
1696 MODULE_AUTHOR("Comedi http://www.comedi.org");
1697 MODULE_DESCRIPTION("Comedi low-level driver");
1698 MODULE_LICENSE("GPL");