linux/drivers/comedi/drivers/pcl812.c
<<
>>
Prefs
   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * comedi/drivers/pcl812.c
   4 *
   5 * Author: Michal Dobes <dobes@tesnet.cz>
   6 *
   7 * hardware driver for Advantech cards
   8 *  card:   PCL-812, PCL-812PG, PCL-813, PCL-813B
   9 *  driver: pcl812,  pcl812pg,  pcl813,  pcl813b
  10 * and for ADlink cards
  11 *  card:   ACL-8112DG, ACL-8112HG, ACL-8112PG, ACL-8113, ACL-8216
  12 *  driver: acl8112dg,  acl8112hg,  acl8112pg,  acl8113,  acl8216
  13 * and for ICP DAS cards
  14 *  card:   ISO-813, A-821PGH, A-821PGL, A-821PGL-NDA, A-822PGH, A-822PGL,
  15 *  driver: iso813,  a821pgh,  a-821pgl, a-821pglnda,  a822pgh,  a822pgl,
  16 *  card:   A-823PGH, A-823PGL, A-826PG
  17 * driver:  a823pgh,  a823pgl,  a826pg
  18 */
  19
  20/*
  21 * Driver: pcl812
  22 * Description: Advantech PCL-812/PG, PCL-813/B,
  23 *           ADLink ACL-8112DG/HG/PG, ACL-8113, ACL-8216,
  24 *           ICP DAS A-821PGH/PGL/PGL-NDA, A-822PGH/PGL, A-823PGH/PGL, A-826PG,
  25 *           ICP DAS ISO-813
  26 * Author: Michal Dobes <dobes@tesnet.cz>
  27 * Devices: [Advantech] PCL-812 (pcl812), PCL-812PG (pcl812pg),
  28 *      PCL-813 (pcl813), PCL-813B (pcl813b), [ADLink] ACL-8112DG (acl8112dg),
  29 *      ACL-8112HG (acl8112hg), ACL-8113 (acl-8113), ACL-8216 (acl8216),
  30 *      [ICP] ISO-813 (iso813), A-821PGH (a821pgh), A-821PGL (a821pgl),
  31 *      A-821PGL-NDA (a821pclnda), A-822PGH (a822pgh), A-822PGL (a822pgl),
  32 *      A-823PGH (a823pgh), A-823PGL (a823pgl), A-826PG (a826pg)
  33 * Updated: Mon, 06 Aug 2007 12:03:15 +0100
  34 * Status: works (I hope. My board fire up under my hands
  35 *             and I cann't test all features.)
  36 *
  37 * This driver supports insn and cmd interfaces. Some boards support only insn
  38 * because their hardware don't allow more (PCL-813/B, ACL-8113, ISO-813).
  39 * Data transfer over DMA is supported only when you measure only one
  40 * channel, this is too hardware limitation of these boards.
  41 *
  42 * Options for PCL-812:
  43 *   [0] - IO Base
  44 *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
  45 *   [2] - DMA  (0=disable, 1, 3)
  46 *   [3] - 0=trigger source is internal 8253 with 2MHz clock
  47 *         1=trigger source is external
  48 *   [4] - 0=A/D input range is +/-10V
  49 *         1=A/D input range is +/-5V
  50 *         2=A/D input range is +/-2.5V
  51 *         3=A/D input range is +/-1.25V
  52 *         4=A/D input range is +/-0.625V
  53 *         5=A/D input range is +/-0.3125V
  54 *   [5] - 0=D/A outputs 0-5V  (internal reference -5V)
  55 *         1=D/A outputs 0-10V (internal reference -10V)
  56 *         2=D/A outputs unknown (external reference)
  57 *
  58 * Options for PCL-812PG, ACL-8112PG:
  59 *   [0] - IO Base
  60 *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
  61 *   [2] - DMA  (0=disable, 1, 3)
  62 *   [3] - 0=trigger source is internal 8253 with 2MHz clock
  63 *         1=trigger source is external
  64 *   [4] - 0=A/D have max +/-5V input
  65 *         1=A/D have max +/-10V input
  66 *   [5] - 0=D/A outputs 0-5V  (internal reference -5V)
  67 *         1=D/A outputs 0-10V (internal reference -10V)
  68 *         2=D/A outputs unknown (external reference)
  69 *
  70 * Options for ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH, ACL-8216, A-826PG:
  71 *   [0] - IO Base
  72 *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
  73 *   [2] - DMA  (0=disable, 1, 3)
  74 *   [3] - 0=trigger source is internal 8253 with 2MHz clock
  75 *         1=trigger source is external
  76 *   [4] - 0=A/D channels are S.E.
  77 *         1=A/D channels are DIFF
  78 *   [5] - 0=D/A outputs 0-5V  (internal reference -5V)
  79 *         1=D/A outputs 0-10V (internal reference -10V)
  80 *         2=D/A outputs unknown (external reference)
  81 *
  82 * Options for A-821PGL/PGH:
  83 *   [0] - IO Base
  84 *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7)
  85 *   [2] - 0=A/D channels are S.E.
  86 *         1=A/D channels are DIFF
  87 *   [3] - 0=D/A output 0-5V  (internal reference -5V)
  88 *         1=D/A output 0-10V (internal reference -10V)
  89 *
  90 * Options for A-821PGL-NDA:
  91 *   [0] - IO Base
  92 *   [1] - IRQ  (0=disable, 2, 3, 4, 5, 6, 7)
  93 *   [2] - 0=A/D channels are S.E.
  94 *         1=A/D channels are DIFF
  95 *
  96 * Options for PCL-813:
  97 *   [0] - IO Base
  98 *
  99 * Options for PCL-813B:
 100 *   [0] - IO Base
 101 *   [1] - 0= bipolar inputs
 102 *         1= unipolar inputs
 103 *
 104 * Options for ACL-8113, ISO-813:
 105 *   [0] - IO Base
 106 *   [1] - 0= 10V bipolar inputs
 107 *         1= 10V unipolar inputs
 108 *         2= 20V bipolar inputs
 109 *         3= 20V unipolar inputs
 110 */
 111
 112#include <linux/module.h>
 113#include <linux/interrupt.h>
 114#include <linux/gfp.h>
 115#include <linux/delay.h>
 116#include <linux/io.h>
 117
 118#include "../comedidev.h"
 119
 120#include "comedi_isadma.h"
 121#include "comedi_8254.h"
 122
 123/*
 124 * Register I/O map
 125 */
 126#define PCL812_TIMER_BASE                       0x00
 127#define PCL812_AI_LSB_REG                       0x04
 128#define PCL812_AI_MSB_REG                       0x05
 129#define PCL812_AI_MSB_DRDY                      BIT(4)
 130#define PCL812_AO_LSB_REG(x)                    (0x04 + ((x) * 2))
 131#define PCL812_AO_MSB_REG(x)                    (0x05 + ((x) * 2))
 132#define PCL812_DI_LSB_REG                       0x06
 133#define PCL812_DI_MSB_REG                       0x07
 134#define PCL812_STATUS_REG                       0x08
 135#define PCL812_STATUS_DRDY                      BIT(5)
 136#define PCL812_RANGE_REG                        0x09
 137#define PCL812_MUX_REG                          0x0a
 138#define PCL812_MUX_CHAN(x)                      ((x) << 0)
 139#define PCL812_MUX_CS0                          BIT(4)
 140#define PCL812_MUX_CS1                          BIT(5)
 141#define PCL812_CTRL_REG                         0x0b
 142#define PCL812_CTRL_TRIG(x)                     (((x) & 0x7) << 0)
 143#define PCL812_CTRL_DISABLE_TRIG                PCL812_CTRL_TRIG(0)
 144#define PCL812_CTRL_SOFT_TRIG                   PCL812_CTRL_TRIG(1)
 145#define PCL812_CTRL_PACER_DMA_TRIG              PCL812_CTRL_TRIG(2)
 146#define PCL812_CTRL_PACER_EOC_TRIG              PCL812_CTRL_TRIG(6)
 147#define PCL812_SOFTTRIG_REG                     0x0c
 148#define PCL812_DO_LSB_REG                       0x0d
 149#define PCL812_DO_MSB_REG                       0x0e
 150
 151#define MAX_CHANLIST_LEN    256 /* length of scan list */
 152
 153static const struct comedi_lrange range_pcl812pg_ai = {
 154        5, {
 155                BIP_RANGE(5),
 156                BIP_RANGE(2.5),
 157                BIP_RANGE(1.25),
 158                BIP_RANGE(0.625),
 159                BIP_RANGE(0.3125)
 160        }
 161};
 162
 163static const struct comedi_lrange range_pcl812pg2_ai = {
 164        5, {
 165                BIP_RANGE(10),
 166                BIP_RANGE(5),
 167                BIP_RANGE(2.5),
 168                BIP_RANGE(1.25),
 169                BIP_RANGE(0.625)
 170        }
 171};
 172
 173static const struct comedi_lrange range812_bipolar1_25 = {
 174        1, {
 175                BIP_RANGE(1.25)
 176        }
 177};
 178
 179static const struct comedi_lrange range812_bipolar0_625 = {
 180        1, {
 181                BIP_RANGE(0.625)
 182        }
 183};
 184
 185static const struct comedi_lrange range812_bipolar0_3125 = {
 186        1, {
 187                BIP_RANGE(0.3125)
 188        }
 189};
 190
 191static const struct comedi_lrange range_pcl813b_ai = {
 192        4, {
 193                BIP_RANGE(5),
 194                BIP_RANGE(2.5),
 195                BIP_RANGE(1.25),
 196                BIP_RANGE(0.625)
 197        }
 198};
 199
 200static const struct comedi_lrange range_pcl813b2_ai = {
 201        4, {
 202                UNI_RANGE(10),
 203                UNI_RANGE(5),
 204                UNI_RANGE(2.5),
 205                UNI_RANGE(1.25)
 206        }
 207};
 208
 209static const struct comedi_lrange range_iso813_1_ai = {
 210        5, {
 211                BIP_RANGE(5),
 212                BIP_RANGE(2.5),
 213                BIP_RANGE(1.25),
 214                BIP_RANGE(0.625),
 215                BIP_RANGE(0.3125)
 216        }
 217};
 218
 219static const struct comedi_lrange range_iso813_1_2_ai = {
 220        5, {
 221                UNI_RANGE(10),
 222                UNI_RANGE(5),
 223                UNI_RANGE(2.5),
 224                UNI_RANGE(1.25),
 225                UNI_RANGE(0.625)
 226        }
 227};
 228
 229static const struct comedi_lrange range_iso813_2_ai = {
 230        4, {
 231                BIP_RANGE(5),
 232                BIP_RANGE(2.5),
 233                BIP_RANGE(1.25),
 234                BIP_RANGE(0.625)
 235        }
 236};
 237
 238static const struct comedi_lrange range_iso813_2_2_ai = {
 239        4, {
 240                UNI_RANGE(10),
 241                UNI_RANGE(5),
 242                UNI_RANGE(2.5),
 243                UNI_RANGE(1.25)
 244        }
 245};
 246
 247static const struct comedi_lrange range_acl8113_1_ai = {
 248        4, {
 249                BIP_RANGE(5),
 250                BIP_RANGE(2.5),
 251                BIP_RANGE(1.25),
 252                BIP_RANGE(0.625)
 253        }
 254};
 255
 256static const struct comedi_lrange range_acl8113_1_2_ai = {
 257        4, {
 258                UNI_RANGE(10),
 259                UNI_RANGE(5),
 260                UNI_RANGE(2.5),
 261                UNI_RANGE(1.25)
 262        }
 263};
 264
 265static const struct comedi_lrange range_acl8113_2_ai = {
 266        3, {
 267                BIP_RANGE(5),
 268                BIP_RANGE(2.5),
 269                BIP_RANGE(1.25)
 270        }
 271};
 272
 273static const struct comedi_lrange range_acl8113_2_2_ai = {
 274        3, {
 275                UNI_RANGE(10),
 276                UNI_RANGE(5),
 277                UNI_RANGE(2.5)
 278        }
 279};
 280
 281static const struct comedi_lrange range_acl8112dg_ai = {
 282        9, {
 283                BIP_RANGE(5),
 284                BIP_RANGE(2.5),
 285                BIP_RANGE(1.25),
 286                BIP_RANGE(0.625),
 287                UNI_RANGE(10),
 288                UNI_RANGE(5),
 289                UNI_RANGE(2.5),
 290                UNI_RANGE(1.25),
 291                BIP_RANGE(10)
 292        }
 293};
 294
 295static const struct comedi_lrange range_acl8112hg_ai = {
 296        12, {
 297                BIP_RANGE(5),
 298                BIP_RANGE(0.5),
 299                BIP_RANGE(0.05),
 300                BIP_RANGE(0.005),
 301                UNI_RANGE(10),
 302                UNI_RANGE(1),
 303                UNI_RANGE(0.1),
 304                UNI_RANGE(0.01),
 305                BIP_RANGE(10),
 306                BIP_RANGE(1),
 307                BIP_RANGE(0.1),
 308                BIP_RANGE(0.01)
 309        }
 310};
 311
 312static const struct comedi_lrange range_a821pgh_ai = {
 313        4, {
 314                BIP_RANGE(5),
 315                BIP_RANGE(0.5),
 316                BIP_RANGE(0.05),
 317                BIP_RANGE(0.005)
 318        }
 319};
 320
 321enum pcl812_boardtype {
 322        BOARD_PCL812PG  = 0,    /* and ACL-8112PG */
 323        BOARD_PCL813B   = 1,
 324        BOARD_PCL812    = 2,
 325        BOARD_PCL813    = 3,
 326        BOARD_ISO813    = 5,
 327        BOARD_ACL8113   = 6,
 328        BOARD_ACL8112   = 7,    /* ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH */
 329        BOARD_ACL8216   = 8,    /* and ICP DAS A-826PG */
 330        BOARD_A821      = 9,    /* PGH, PGL, PGL/NDA versions */
 331};
 332
 333struct pcl812_board {
 334        const char *name;
 335        enum pcl812_boardtype board_type;
 336        int n_aichan;
 337        int n_aochan;
 338        unsigned int ai_ns_min;
 339        const struct comedi_lrange *rangelist_ai;
 340        unsigned int irq_bits;
 341        unsigned int has_dma:1;
 342        unsigned int has_16bit_ai:1;
 343        unsigned int has_mpc508_mux:1;
 344        unsigned int has_dio:1;
 345};
 346
 347static const struct pcl812_board boardtypes[] = {
 348        {
 349                .name           = "pcl812",
 350                .board_type     = BOARD_PCL812,
 351                .n_aichan       = 16,
 352                .n_aochan       = 2,
 353                .ai_ns_min      = 33000,
 354                .rangelist_ai   = &range_bipolar10,
 355                .irq_bits       = 0xdcfc,
 356                .has_dma        = 1,
 357                .has_dio        = 1,
 358        }, {
 359                .name           = "pcl812pg",
 360                .board_type     = BOARD_PCL812PG,
 361                .n_aichan       = 16,
 362                .n_aochan       = 2,
 363                .ai_ns_min      = 33000,
 364                .rangelist_ai   = &range_pcl812pg_ai,
 365                .irq_bits       = 0xdcfc,
 366                .has_dma        = 1,
 367                .has_dio        = 1,
 368        }, {
 369                .name           = "acl8112pg",
 370                .board_type     = BOARD_PCL812PG,
 371                .n_aichan       = 16,
 372                .n_aochan       = 2,
 373                .ai_ns_min      = 10000,
 374                .rangelist_ai   = &range_pcl812pg_ai,
 375                .irq_bits       = 0xdcfc,
 376                .has_dma        = 1,
 377                .has_dio        = 1,
 378        }, {
 379                .name           = "acl8112dg",
 380                .board_type     = BOARD_ACL8112,
 381                .n_aichan       = 16,   /* 8 differential */
 382                .n_aochan       = 2,
 383                .ai_ns_min      = 10000,
 384                .rangelist_ai   = &range_acl8112dg_ai,
 385                .irq_bits       = 0xdcfc,
 386                .has_dma        = 1,
 387                .has_mpc508_mux = 1,
 388                .has_dio        = 1,
 389        }, {
 390                .name           = "acl8112hg",
 391                .board_type     = BOARD_ACL8112,
 392                .n_aichan       = 16,   /* 8 differential */
 393                .n_aochan       = 2,
 394                .ai_ns_min      = 10000,
 395                .rangelist_ai   = &range_acl8112hg_ai,
 396                .irq_bits       = 0xdcfc,
 397                .has_dma        = 1,
 398                .has_mpc508_mux = 1,
 399                .has_dio        = 1,
 400        }, {
 401                .name           = "a821pgl",
 402                .board_type     = BOARD_A821,
 403                .n_aichan       = 16,   /* 8 differential */
 404                .n_aochan       = 1,
 405                .ai_ns_min      = 10000,
 406                .rangelist_ai   = &range_pcl813b_ai,
 407                .irq_bits       = 0x000c,
 408                .has_dio        = 1,
 409        }, {
 410                .name           = "a821pglnda",
 411                .board_type     = BOARD_A821,
 412                .n_aichan       = 16,   /* 8 differential */
 413                .ai_ns_min      = 10000,
 414                .rangelist_ai   = &range_pcl813b_ai,
 415                .irq_bits       = 0x000c,
 416        }, {
 417                .name           = "a821pgh",
 418                .board_type     = BOARD_A821,
 419                .n_aichan       = 16,   /* 8 differential */
 420                .n_aochan       = 1,
 421                .ai_ns_min      = 10000,
 422                .rangelist_ai   = &range_a821pgh_ai,
 423                .irq_bits       = 0x000c,
 424                .has_dio        = 1,
 425        }, {
 426                .name           = "a822pgl",
 427                .board_type     = BOARD_ACL8112,
 428                .n_aichan       = 16,   /* 8 differential */
 429                .n_aochan       = 2,
 430                .ai_ns_min      = 10000,
 431                .rangelist_ai   = &range_acl8112dg_ai,
 432                .irq_bits       = 0xdcfc,
 433                .has_dma        = 1,
 434                .has_dio        = 1,
 435        }, {
 436                .name           = "a822pgh",
 437                .board_type     = BOARD_ACL8112,
 438                .n_aichan       = 16,   /* 8 differential */
 439                .n_aochan       = 2,
 440                .ai_ns_min      = 10000,
 441                .rangelist_ai   = &range_acl8112hg_ai,
 442                .irq_bits       = 0xdcfc,
 443                .has_dma        = 1,
 444                .has_dio        = 1,
 445        }, {
 446                .name           = "a823pgl",
 447                .board_type     = BOARD_ACL8112,
 448                .n_aichan       = 16,   /* 8 differential */
 449                .n_aochan       = 2,
 450                .ai_ns_min      = 8000,
 451                .rangelist_ai   = &range_acl8112dg_ai,
 452                .irq_bits       = 0xdcfc,
 453                .has_dma        = 1,
 454                .has_dio        = 1,
 455        }, {
 456                .name           = "a823pgh",
 457                .board_type     = BOARD_ACL8112,
 458                .n_aichan       = 16,   /* 8 differential */
 459                .n_aochan       = 2,
 460                .ai_ns_min      = 8000,
 461                .rangelist_ai   = &range_acl8112hg_ai,
 462                .irq_bits       = 0xdcfc,
 463                .has_dma        = 1,
 464                .has_dio        = 1,
 465        }, {
 466                .name           = "pcl813",
 467                .board_type     = BOARD_PCL813,
 468                .n_aichan       = 32,
 469                .rangelist_ai   = &range_pcl813b_ai,
 470        }, {
 471                .name           = "pcl813b",
 472                .board_type     = BOARD_PCL813B,
 473                .n_aichan       = 32,
 474                .rangelist_ai   = &range_pcl813b_ai,
 475        }, {
 476                .name           = "acl8113",
 477                .board_type     = BOARD_ACL8113,
 478                .n_aichan       = 32,
 479                .rangelist_ai   = &range_acl8113_1_ai,
 480        }, {
 481                .name           = "iso813",
 482                .board_type     = BOARD_ISO813,
 483                .n_aichan       = 32,
 484                .rangelist_ai   = &range_iso813_1_ai,
 485        }, {
 486                .name           = "acl8216",
 487                .board_type     = BOARD_ACL8216,
 488                .n_aichan       = 16,   /* 8 differential */
 489                .n_aochan       = 2,
 490                .ai_ns_min      = 10000,
 491                .rangelist_ai   = &range_pcl813b2_ai,
 492                .irq_bits       = 0xdcfc,
 493                .has_dma        = 1,
 494                .has_16bit_ai   = 1,
 495                .has_mpc508_mux = 1,
 496                .has_dio        = 1,
 497        }, {
 498                .name           = "a826pg",
 499                .board_type     = BOARD_ACL8216,
 500                .n_aichan       = 16,   /* 8 differential */
 501                .n_aochan       = 2,
 502                .ai_ns_min      = 10000,
 503                .rangelist_ai   = &range_pcl813b2_ai,
 504                .irq_bits       = 0xdcfc,
 505                .has_dma        = 1,
 506                .has_16bit_ai   = 1,
 507                .has_dio        = 1,
 508        },
 509};
 510
 511struct pcl812_private {
 512        struct comedi_isadma *dma;
 513        unsigned char range_correction; /* =1 we must add 1 to range number */
 514        unsigned int last_ai_chanspec;
 515        unsigned char mode_reg_int; /* stored INT number for some cards */
 516        unsigned int ai_poll_ptr; /* how many samples transfer poll */
 517        unsigned int max_812_ai_mode0_rangewait; /* settling time for gain */
 518        unsigned int use_diff:1;
 519        unsigned int use_mpc508:1;
 520        unsigned int use_ext_trg:1;
 521        unsigned int ai_dma:1;
 522        unsigned int ai_eos:1;
 523};
 524
 525static void pcl812_ai_setup_dma(struct comedi_device *dev,
 526                                struct comedi_subdevice *s,
 527                                unsigned int unread_samples)
 528{
 529        struct pcl812_private *devpriv = dev->private;
 530        struct comedi_isadma *dma = devpriv->dma;
 531        struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
 532        unsigned int bytes;
 533        unsigned int max_samples;
 534        unsigned int nsamples;
 535
 536        comedi_isadma_disable(dma->chan);
 537
 538        /* if using EOS, adapt DMA buffer to one scan */
 539        bytes = devpriv->ai_eos ? comedi_bytes_per_scan(s) : desc->maxsize;
 540        max_samples = comedi_bytes_to_samples(s, bytes);
 541
 542        /*
 543         * Determine dma size based on the buffer size plus the number of
 544         * unread samples and the number of samples remaining in the command.
 545         */
 546        nsamples = comedi_nsamples_left(s, max_samples + unread_samples);
 547        if (nsamples > unread_samples) {
 548                nsamples -= unread_samples;
 549                desc->size = comedi_samples_to_bytes(s, nsamples);
 550                comedi_isadma_program(desc);
 551        }
 552}
 553
 554static void pcl812_ai_set_chan_range(struct comedi_device *dev,
 555                                     unsigned int chanspec, char wait)
 556{
 557        struct pcl812_private *devpriv = dev->private;
 558        unsigned int chan = CR_CHAN(chanspec);
 559        unsigned int range = CR_RANGE(chanspec);
 560        unsigned int mux = 0;
 561
 562        if (chanspec == devpriv->last_ai_chanspec)
 563                return;
 564
 565        devpriv->last_ai_chanspec = chanspec;
 566
 567        if (devpriv->use_mpc508) {
 568                if (devpriv->use_diff) {
 569                        mux |= PCL812_MUX_CS0 | PCL812_MUX_CS1;
 570                } else {
 571                        if (chan < 8)
 572                                mux |= PCL812_MUX_CS0;
 573                        else
 574                                mux |= PCL812_MUX_CS1;
 575                }
 576        }
 577
 578        outb(mux | PCL812_MUX_CHAN(chan), dev->iobase + PCL812_MUX_REG);
 579        outb(range + devpriv->range_correction, dev->iobase + PCL812_RANGE_REG);
 580
 581        if (wait)
 582                /*
 583                 * XXX this depends on selected range and can be very long for
 584                 * some high gain ranges!
 585                 */
 586                udelay(devpriv->max_812_ai_mode0_rangewait);
 587}
 588
 589static void pcl812_ai_clear_eoc(struct comedi_device *dev)
 590{
 591        /* writing any value clears the interrupt request */
 592        outb(0, dev->iobase + PCL812_STATUS_REG);
 593}
 594
 595static void pcl812_ai_soft_trig(struct comedi_device *dev)
 596{
 597        /* writing any value triggers a software conversion */
 598        outb(255, dev->iobase + PCL812_SOFTTRIG_REG);
 599}
 600
 601static unsigned int pcl812_ai_get_sample(struct comedi_device *dev,
 602                                         struct comedi_subdevice *s)
 603{
 604        unsigned int val;
 605
 606        val = inb(dev->iobase + PCL812_AI_MSB_REG) << 8;
 607        val |= inb(dev->iobase + PCL812_AI_LSB_REG);
 608
 609        return val & s->maxdata;
 610}
 611
 612static int pcl812_ai_eoc(struct comedi_device *dev,
 613                         struct comedi_subdevice *s,
 614                         struct comedi_insn *insn,
 615                         unsigned long context)
 616{
 617        unsigned int status;
 618
 619        if (s->maxdata > 0x0fff) {
 620                status = inb(dev->iobase + PCL812_STATUS_REG);
 621                if ((status & PCL812_STATUS_DRDY) == 0)
 622                        return 0;
 623        } else {
 624                status = inb(dev->iobase + PCL812_AI_MSB_REG);
 625                if ((status & PCL812_AI_MSB_DRDY) == 0)
 626                        return 0;
 627        }
 628        return -EBUSY;
 629}
 630
 631static int pcl812_ai_cmdtest(struct comedi_device *dev,
 632                             struct comedi_subdevice *s, struct comedi_cmd *cmd)
 633{
 634        const struct pcl812_board *board = dev->board_ptr;
 635        struct pcl812_private *devpriv = dev->private;
 636        int err = 0;
 637        unsigned int flags;
 638
 639        /* Step 1 : check if triggers are trivially valid */
 640
 641        err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
 642        err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
 643
 644        if (devpriv->use_ext_trg)
 645                flags = TRIG_EXT;
 646        else
 647                flags = TRIG_TIMER;
 648        err |= comedi_check_trigger_src(&cmd->convert_src, flags);
 649
 650        err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
 651        err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
 652
 653        if (err)
 654                return 1;
 655
 656        /* Step 2a : make sure trigger sources are unique */
 657
 658        err |= comedi_check_trigger_is_unique(cmd->stop_src);
 659
 660        /* Step 2b : and mutually compatible */
 661
 662        if (err)
 663                return 2;
 664
 665        /* Step 3: check if arguments are trivially valid */
 666
 667        err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
 668        err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 669
 670        if (cmd->convert_src == TRIG_TIMER) {
 671                err |= comedi_check_trigger_arg_min(&cmd->convert_arg,
 672                                                    board->ai_ns_min);
 673        } else {        /* TRIG_EXT */
 674                err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
 675        }
 676
 677        err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1);
 678        err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
 679                                           cmd->chanlist_len);
 680
 681        if (cmd->stop_src == TRIG_COUNT)
 682                err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
 683        else    /* TRIG_NONE */
 684                err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
 685
 686        if (err)
 687                return 3;
 688
 689        /* step 4: fix up any arguments */
 690
 691        if (cmd->convert_src == TRIG_TIMER) {
 692                unsigned int arg = cmd->convert_arg;
 693
 694                comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
 695                err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
 696        }
 697
 698        if (err)
 699                return 4;
 700
 701        return 0;
 702}
 703
 704static int pcl812_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 705{
 706        struct pcl812_private *devpriv = dev->private;
 707        struct comedi_isadma *dma = devpriv->dma;
 708        struct comedi_cmd *cmd = &s->async->cmd;
 709        unsigned int ctrl = 0;
 710        unsigned int i;
 711
 712        pcl812_ai_set_chan_range(dev, cmd->chanlist[0], 1);
 713
 714        if (dma) {      /*  check if we can use DMA transfer */
 715                devpriv->ai_dma = 1;
 716                for (i = 1; i < cmd->chanlist_len; i++)
 717                        if (cmd->chanlist[0] != cmd->chanlist[i]) {
 718                                /*  we cann't use DMA :-( */
 719                                devpriv->ai_dma = 0;
 720                                break;
 721                        }
 722        } else {
 723                devpriv->ai_dma = 0;
 724        }
 725
 726        devpriv->ai_poll_ptr = 0;
 727
 728        /*  don't we want wake up every scan? */
 729        if (cmd->flags & CMDF_WAKE_EOS) {
 730                devpriv->ai_eos = 1;
 731
 732                /*  DMA is useless for this situation */
 733                if (cmd->chanlist_len == 1)
 734                        devpriv->ai_dma = 0;
 735        }
 736
 737        if (devpriv->ai_dma) {
 738                /* setup and enable dma for the first buffer */
 739                dma->cur_dma = 0;
 740                pcl812_ai_setup_dma(dev, s, 0);
 741        }
 742
 743        switch (cmd->convert_src) {
 744        case TRIG_TIMER:
 745                comedi_8254_update_divisors(dev->pacer);
 746                comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
 747                break;
 748        }
 749
 750        if (devpriv->ai_dma)
 751                ctrl |= PCL812_CTRL_PACER_DMA_TRIG;
 752        else
 753                ctrl |= PCL812_CTRL_PACER_EOC_TRIG;
 754        outb(devpriv->mode_reg_int | ctrl, dev->iobase + PCL812_CTRL_REG);
 755
 756        return 0;
 757}
 758
 759static bool pcl812_ai_next_chan(struct comedi_device *dev,
 760                                struct comedi_subdevice *s)
 761{
 762        struct comedi_cmd *cmd = &s->async->cmd;
 763
 764        if (cmd->stop_src == TRIG_COUNT &&
 765            s->async->scans_done >= cmd->stop_arg) {
 766                s->async->events |= COMEDI_CB_EOA;
 767                return false;
 768        }
 769
 770        return true;
 771}
 772
 773static void pcl812_handle_eoc(struct comedi_device *dev,
 774                              struct comedi_subdevice *s)
 775{
 776        struct comedi_cmd *cmd = &s->async->cmd;
 777        unsigned int chan = s->async->cur_chan;
 778        unsigned int next_chan;
 779        unsigned short val;
 780
 781        if (pcl812_ai_eoc(dev, s, NULL, 0)) {
 782                dev_dbg(dev->class_dev, "A/D cmd IRQ without DRDY!\n");
 783                s->async->events |= COMEDI_CB_ERROR;
 784                return;
 785        }
 786
 787        val = pcl812_ai_get_sample(dev, s);
 788        comedi_buf_write_samples(s, &val, 1);
 789
 790        /* Set up next channel. Added by abbotti 2010-01-20, but untested. */
 791        next_chan = s->async->cur_chan;
 792        if (cmd->chanlist[chan] != cmd->chanlist[next_chan])
 793                pcl812_ai_set_chan_range(dev, cmd->chanlist[next_chan], 0);
 794
 795        pcl812_ai_next_chan(dev, s);
 796}
 797
 798static void transfer_from_dma_buf(struct comedi_device *dev,
 799                                  struct comedi_subdevice *s,
 800                                  unsigned short *ptr,
 801                                  unsigned int bufptr, unsigned int len)
 802{
 803        unsigned int i;
 804        unsigned short val;
 805
 806        for (i = len; i; i--) {
 807                val = ptr[bufptr++];
 808                comedi_buf_write_samples(s, &val, 1);
 809
 810                if (!pcl812_ai_next_chan(dev, s))
 811                        break;
 812        }
 813}
 814
 815static void pcl812_handle_dma(struct comedi_device *dev,
 816                              struct comedi_subdevice *s)
 817{
 818        struct pcl812_private *devpriv = dev->private;
 819        struct comedi_isadma *dma = devpriv->dma;
 820        struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
 821        unsigned int nsamples;
 822        int bufptr;
 823
 824        nsamples = comedi_bytes_to_samples(s, desc->size) -
 825                   devpriv->ai_poll_ptr;
 826        bufptr = devpriv->ai_poll_ptr;
 827        devpriv->ai_poll_ptr = 0;
 828
 829        /* restart dma with the next buffer */
 830        dma->cur_dma = 1 - dma->cur_dma;
 831        pcl812_ai_setup_dma(dev, s, nsamples);
 832
 833        transfer_from_dma_buf(dev, s, desc->virt_addr, bufptr, nsamples);
 834}
 835
 836static irqreturn_t pcl812_interrupt(int irq, void *d)
 837{
 838        struct comedi_device *dev = d;
 839        struct comedi_subdevice *s = dev->read_subdev;
 840        struct pcl812_private *devpriv = dev->private;
 841
 842        if (!dev->attached) {
 843                pcl812_ai_clear_eoc(dev);
 844                return IRQ_HANDLED;
 845        }
 846
 847        if (devpriv->ai_dma)
 848                pcl812_handle_dma(dev, s);
 849        else
 850                pcl812_handle_eoc(dev, s);
 851
 852        pcl812_ai_clear_eoc(dev);
 853
 854        comedi_handle_events(dev, s);
 855        return IRQ_HANDLED;
 856}
 857
 858static int pcl812_ai_poll(struct comedi_device *dev, struct comedi_subdevice *s)
 859{
 860        struct pcl812_private *devpriv = dev->private;
 861        struct comedi_isadma *dma = devpriv->dma;
 862        struct comedi_isadma_desc *desc;
 863        unsigned long flags;
 864        unsigned int poll;
 865        int ret;
 866
 867        /* poll is valid only for DMA transfer */
 868        if (!devpriv->ai_dma)
 869                return 0;
 870
 871        spin_lock_irqsave(&dev->spinlock, flags);
 872
 873        poll = comedi_isadma_poll(dma);
 874        poll = comedi_bytes_to_samples(s, poll);
 875        if (poll > devpriv->ai_poll_ptr) {
 876                desc = &dma->desc[dma->cur_dma];
 877                transfer_from_dma_buf(dev, s, desc->virt_addr,
 878                                      devpriv->ai_poll_ptr,
 879                                      poll - devpriv->ai_poll_ptr);
 880                /* new buffer position */
 881                devpriv->ai_poll_ptr = poll;
 882
 883                ret = comedi_buf_n_bytes_ready(s);
 884        } else {
 885                /* no new samples */
 886                ret = 0;
 887        }
 888
 889        spin_unlock_irqrestore(&dev->spinlock, flags);
 890
 891        return ret;
 892}
 893
 894static int pcl812_ai_cancel(struct comedi_device *dev,
 895                            struct comedi_subdevice *s)
 896{
 897        struct pcl812_private *devpriv = dev->private;
 898
 899        if (devpriv->ai_dma)
 900                comedi_isadma_disable(devpriv->dma->chan);
 901
 902        outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
 903             dev->iobase + PCL812_CTRL_REG);
 904        comedi_8254_pacer_enable(dev->pacer, 1, 2, false);
 905        pcl812_ai_clear_eoc(dev);
 906        return 0;
 907}
 908
 909static int pcl812_ai_insn_read(struct comedi_device *dev,
 910                               struct comedi_subdevice *s,
 911                               struct comedi_insn *insn,
 912                               unsigned int *data)
 913{
 914        struct pcl812_private *devpriv = dev->private;
 915        int ret = 0;
 916        int i;
 917
 918        outb(devpriv->mode_reg_int | PCL812_CTRL_SOFT_TRIG,
 919             dev->iobase + PCL812_CTRL_REG);
 920
 921        pcl812_ai_set_chan_range(dev, insn->chanspec, 1);
 922
 923        for (i = 0; i < insn->n; i++) {
 924                pcl812_ai_clear_eoc(dev);
 925                pcl812_ai_soft_trig(dev);
 926
 927                ret = comedi_timeout(dev, s, insn, pcl812_ai_eoc, 0);
 928                if (ret)
 929                        break;
 930
 931                data[i] = pcl812_ai_get_sample(dev, s);
 932        }
 933        outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
 934             dev->iobase + PCL812_CTRL_REG);
 935        pcl812_ai_clear_eoc(dev);
 936
 937        return ret ? ret : insn->n;
 938}
 939
 940static int pcl812_ao_insn_write(struct comedi_device *dev,
 941                                struct comedi_subdevice *s,
 942                                struct comedi_insn *insn,
 943                                unsigned int *data)
 944{
 945        unsigned int chan = CR_CHAN(insn->chanspec);
 946        unsigned int val = s->readback[chan];
 947        int i;
 948
 949        for (i = 0; i < insn->n; i++) {
 950                val = data[i];
 951                outb(val & 0xff, dev->iobase + PCL812_AO_LSB_REG(chan));
 952                outb((val >> 8) & 0x0f, dev->iobase + PCL812_AO_MSB_REG(chan));
 953        }
 954        s->readback[chan] = val;
 955
 956        return insn->n;
 957}
 958
 959static int pcl812_di_insn_bits(struct comedi_device *dev,
 960                               struct comedi_subdevice *s,
 961                               struct comedi_insn *insn,
 962                               unsigned int *data)
 963{
 964        data[1] = inb(dev->iobase + PCL812_DI_LSB_REG) |
 965                  (inb(dev->iobase + PCL812_DI_MSB_REG) << 8);
 966
 967        return insn->n;
 968}
 969
 970static int pcl812_do_insn_bits(struct comedi_device *dev,
 971                               struct comedi_subdevice *s,
 972                               struct comedi_insn *insn,
 973                               unsigned int *data)
 974{
 975        if (comedi_dio_update_state(s, data)) {
 976                outb(s->state & 0xff, dev->iobase + PCL812_DO_LSB_REG);
 977                outb((s->state >> 8), dev->iobase + PCL812_DO_MSB_REG);
 978        }
 979
 980        data[1] = s->state;
 981
 982        return insn->n;
 983}
 984
 985static void pcl812_reset(struct comedi_device *dev)
 986{
 987        const struct pcl812_board *board = dev->board_ptr;
 988        struct pcl812_private *devpriv = dev->private;
 989        unsigned int chan;
 990
 991        /* disable analog input trigger */
 992        outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
 993             dev->iobase + PCL812_CTRL_REG);
 994        pcl812_ai_clear_eoc(dev);
 995
 996        /*
 997         * Invalidate last_ai_chanspec then set analog input to
 998         * known channel/range.
 999         */
1000        devpriv->last_ai_chanspec = CR_PACK(16, 0, 0);
1001        pcl812_ai_set_chan_range(dev, CR_PACK(0, 0, 0), 0);
1002
1003        /* set analog output channels to 0V */
1004        for (chan = 0; chan < board->n_aochan; chan++) {
1005                outb(0, dev->iobase + PCL812_AO_LSB_REG(chan));
1006                outb(0, dev->iobase + PCL812_AO_MSB_REG(chan));
1007        }
1008
1009        /* set all digital outputs low */
1010        if (board->has_dio) {
1011                outb(0, dev->iobase + PCL812_DO_MSB_REG);
1012                outb(0, dev->iobase + PCL812_DO_LSB_REG);
1013        }
1014}
1015
1016static void pcl812_set_ai_range_table(struct comedi_device *dev,
1017                                      struct comedi_subdevice *s,
1018                                      struct comedi_devconfig *it)
1019{
1020        const struct pcl812_board *board = dev->board_ptr;
1021        struct pcl812_private *devpriv = dev->private;
1022
1023        switch (board->board_type) {
1024        case BOARD_PCL812PG:
1025                if (it->options[4] == 1)
1026                        s->range_table = &range_pcl812pg2_ai;
1027                else
1028                        s->range_table = board->rangelist_ai;
1029                break;
1030        case BOARD_PCL812:
1031                switch (it->options[4]) {
1032                case 0:
1033                        s->range_table = &range_bipolar10;
1034                        break;
1035                case 1:
1036                        s->range_table = &range_bipolar5;
1037                        break;
1038                case 2:
1039                        s->range_table = &range_bipolar2_5;
1040                        break;
1041                case 3:
1042                        s->range_table = &range812_bipolar1_25;
1043                        break;
1044                case 4:
1045                        s->range_table = &range812_bipolar0_625;
1046                        break;
1047                case 5:
1048                        s->range_table = &range812_bipolar0_3125;
1049                        break;
1050                default:
1051                        s->range_table = &range_bipolar10;
1052                        break;
1053                }
1054                break;
1055        case BOARD_PCL813B:
1056                if (it->options[1] == 1)
1057                        s->range_table = &range_pcl813b2_ai;
1058                else
1059                        s->range_table = board->rangelist_ai;
1060                break;
1061        case BOARD_ISO813:
1062                switch (it->options[1]) {
1063                case 0:
1064                        s->range_table = &range_iso813_1_ai;
1065                        break;
1066                case 1:
1067                        s->range_table = &range_iso813_1_2_ai;
1068                        break;
1069                case 2:
1070                        s->range_table = &range_iso813_2_ai;
1071                        devpriv->range_correction = 1;
1072                        break;
1073                case 3:
1074                        s->range_table = &range_iso813_2_2_ai;
1075                        devpriv->range_correction = 1;
1076                        break;
1077                default:
1078                        s->range_table = &range_iso813_1_ai;
1079                        break;
1080                }
1081                break;
1082        case BOARD_ACL8113:
1083                switch (it->options[1]) {
1084                case 0:
1085                        s->range_table = &range_acl8113_1_ai;
1086                        break;
1087                case 1:
1088                        s->range_table = &range_acl8113_1_2_ai;
1089                        break;
1090                case 2:
1091                        s->range_table = &range_acl8113_2_ai;
1092                        devpriv->range_correction = 1;
1093                        break;
1094                case 3:
1095                        s->range_table = &range_acl8113_2_2_ai;
1096                        devpriv->range_correction = 1;
1097                        break;
1098                default:
1099                        s->range_table = &range_acl8113_1_ai;
1100                        break;
1101                }
1102                break;
1103        default:
1104                s->range_table = board->rangelist_ai;
1105                break;
1106        }
1107}
1108
1109static void pcl812_alloc_dma(struct comedi_device *dev, unsigned int dma_chan)
1110{
1111        struct pcl812_private *devpriv = dev->private;
1112
1113        /* only DMA channels 3 and 1 are valid */
1114        if (!(dma_chan == 3 || dma_chan == 1))
1115                return;
1116
1117        /* DMA uses two 8K buffers */
1118        devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan,
1119                                           PAGE_SIZE * 2, COMEDI_ISADMA_READ);
1120}
1121
1122static void pcl812_free_dma(struct comedi_device *dev)
1123{
1124        struct pcl812_private *devpriv = dev->private;
1125
1126        if (devpriv)
1127                comedi_isadma_free(devpriv->dma);
1128}
1129
1130static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1131{
1132        const struct pcl812_board *board = dev->board_ptr;
1133        struct pcl812_private *devpriv;
1134        struct comedi_subdevice *s;
1135        int n_subdevices;
1136        int subdev;
1137        int ret;
1138
1139        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1140        if (!devpriv)
1141                return -ENOMEM;
1142
1143        ret = comedi_request_region(dev, it->options[0], 0x10);
1144        if (ret)
1145                return ret;
1146
1147        if (board->irq_bits) {
1148                dev->pacer = comedi_8254_init(dev->iobase + PCL812_TIMER_BASE,
1149                                              I8254_OSC_BASE_2MHZ,
1150                                              I8254_IO8, 0);
1151                if (!dev->pacer)
1152                        return -ENOMEM;
1153
1154                if ((1 << it->options[1]) & board->irq_bits) {
1155                        ret = request_irq(it->options[1], pcl812_interrupt, 0,
1156                                          dev->board_name, dev);
1157                        if (ret == 0)
1158                                dev->irq = it->options[1];
1159                }
1160        }
1161
1162        /* we need an IRQ to do DMA on channel 3 or 1 */
1163        if (dev->irq && board->has_dma)
1164                pcl812_alloc_dma(dev, it->options[2]);
1165
1166        /* differential analog inputs? */
1167        switch (board->board_type) {
1168        case BOARD_A821:
1169                if (it->options[2] == 1)
1170                        devpriv->use_diff = 1;
1171                break;
1172        case BOARD_ACL8112:
1173        case BOARD_ACL8216:
1174                if (it->options[4] == 1)
1175                        devpriv->use_diff = 1;
1176                break;
1177        default:
1178                break;
1179        }
1180
1181        n_subdevices = 1;               /* all boardtypes have analog inputs */
1182        if (board->n_aochan > 0)
1183                n_subdevices++;
1184        if (board->has_dio)
1185                n_subdevices += 2;
1186
1187        ret = comedi_alloc_subdevices(dev, n_subdevices);
1188        if (ret)
1189                return ret;
1190
1191        subdev = 0;
1192
1193        /* Analog Input subdevice */
1194        s = &dev->subdevices[subdev];
1195        s->type         = COMEDI_SUBD_AI;
1196        s->subdev_flags = SDF_READABLE;
1197        if (devpriv->use_diff) {
1198                s->subdev_flags |= SDF_DIFF;
1199                s->n_chan       = board->n_aichan / 2;
1200        } else {
1201                s->subdev_flags |= SDF_GROUND;
1202                s->n_chan       = board->n_aichan;
1203        }
1204        s->maxdata      = board->has_16bit_ai ? 0xffff : 0x0fff;
1205
1206        pcl812_set_ai_range_table(dev, s, it);
1207
1208        s->insn_read    = pcl812_ai_insn_read;
1209
1210        if (dev->irq) {
1211                dev->read_subdev = s;
1212                s->subdev_flags |= SDF_CMD_READ;
1213                s->len_chanlist = MAX_CHANLIST_LEN;
1214                s->do_cmdtest   = pcl812_ai_cmdtest;
1215                s->do_cmd       = pcl812_ai_cmd;
1216                s->poll         = pcl812_ai_poll;
1217                s->cancel       = pcl812_ai_cancel;
1218        }
1219
1220        devpriv->use_mpc508 = board->has_mpc508_mux;
1221
1222        subdev++;
1223
1224        /* analog output */
1225        if (board->n_aochan > 0) {
1226                s = &dev->subdevices[subdev];
1227                s->type         = COMEDI_SUBD_AO;
1228                s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
1229                s->n_chan       = board->n_aochan;
1230                s->maxdata      = 0xfff;
1231                switch (board->board_type) {
1232                case BOARD_A821:
1233                        if (it->options[3] == 1)
1234                                s->range_table = &range_unipolar10;
1235                        else
1236                                s->range_table = &range_unipolar5;
1237                        break;
1238                case BOARD_PCL812:
1239                case BOARD_ACL8112:
1240                case BOARD_PCL812PG:
1241                case BOARD_ACL8216:
1242                        switch (it->options[5]) {
1243                        case 1:
1244                                s->range_table = &range_unipolar10;
1245                                break;
1246                        case 2:
1247                                s->range_table = &range_unknown;
1248                                break;
1249                        default:
1250                                s->range_table = &range_unipolar5;
1251                                break;
1252                        }
1253                        break;
1254                default:
1255                        s->range_table = &range_unipolar5;
1256                        break;
1257                }
1258                s->insn_write   = pcl812_ao_insn_write;
1259
1260                ret = comedi_alloc_subdev_readback(s);
1261                if (ret)
1262                        return ret;
1263
1264                subdev++;
1265        }
1266
1267        if (board->has_dio) {
1268                /* Digital Input subdevice */
1269                s = &dev->subdevices[subdev];
1270                s->type         = COMEDI_SUBD_DI;
1271                s->subdev_flags = SDF_READABLE;
1272                s->n_chan       = 16;
1273                s->maxdata      = 1;
1274                s->range_table  = &range_digital;
1275                s->insn_bits    = pcl812_di_insn_bits;
1276                subdev++;
1277
1278                /* Digital Output subdevice */
1279                s = &dev->subdevices[subdev];
1280                s->type         = COMEDI_SUBD_DO;
1281                s->subdev_flags = SDF_WRITABLE;
1282                s->n_chan       = 16;
1283                s->maxdata      = 1;
1284                s->range_table  = &range_digital;
1285                s->insn_bits    = pcl812_do_insn_bits;
1286                subdev++;
1287        }
1288
1289        switch (board->board_type) {
1290        case BOARD_ACL8216:
1291        case BOARD_PCL812PG:
1292        case BOARD_PCL812:
1293        case BOARD_ACL8112:
1294                devpriv->max_812_ai_mode0_rangewait = 1;
1295                if (it->options[3] > 0)
1296                                                /*  we use external trigger */
1297                        devpriv->use_ext_trg = 1;
1298                break;
1299        case BOARD_A821:
1300                devpriv->max_812_ai_mode0_rangewait = 1;
1301                devpriv->mode_reg_int = (dev->irq << 4) & 0xf0;
1302                break;
1303        case BOARD_PCL813B:
1304        case BOARD_PCL813:
1305        case BOARD_ISO813:
1306        case BOARD_ACL8113:
1307                /* maybe there must by greatest timeout */
1308                devpriv->max_812_ai_mode0_rangewait = 5;
1309                break;
1310        }
1311
1312        pcl812_reset(dev);
1313
1314        return 0;
1315}
1316
1317static void pcl812_detach(struct comedi_device *dev)
1318{
1319        pcl812_free_dma(dev);
1320        comedi_legacy_detach(dev);
1321}
1322
1323static struct comedi_driver pcl812_driver = {
1324        .driver_name    = "pcl812",
1325        .module         = THIS_MODULE,
1326        .attach         = pcl812_attach,
1327        .detach         = pcl812_detach,
1328        .board_name     = &boardtypes[0].name,
1329        .num_names      = ARRAY_SIZE(boardtypes),
1330        .offset         = sizeof(struct pcl812_board),
1331};
1332module_comedi_driver(pcl812_driver);
1333
1334MODULE_AUTHOR("Comedi https://www.comedi.org");
1335MODULE_DESCRIPTION("Comedi low-level driver");
1336MODULE_LICENSE("GPL");
1337