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