LXR linux/drivers/staging/comedi/drivers/dt2811.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Comedi driver for Data Translation DT2811
   4 *
   5 * COMEDI - Linux Control and Measurement Device Interface
   6 * Copyright (C) David A. Schleef <ds@schleef.org>
   7 */
   8
   9/*
  10 * Driver: dt2811
  11 * Description: Data Translation DT2811
  12 * Author: ds
  13 * Devices: [Data Translation] DT2811-PGL (dt2811-pgl), DT2811-PGH (dt2811-pgh)
  14 * Status: works
  15 *
  16 * Configuration options:
  17 *   [0] - I/O port base address
  18 *   [1] - IRQ (optional, needed for async command support)
  19 *   [2] - A/D reference (# of analog inputs)
  20 *         0 = single-ended (16 channels)
  21 *         1 = differential (8 channels)
  22 *         2 = pseudo-differential (16 channels)
  23 *   [3] - A/D range (deprecated, see below)
  24 *   [4] - D/A 0 range (deprecated, see below)
  25 *   [5] - D/A 1 range (deprecated, see below)
  26 *
  27 * Notes:
  28 *   - A/D ranges are not programmable but the gain is. The AI subdevice has
  29 *     a range_table containing all the possible analog input range/gain
  30 *     options for the dt2811-pgh or dt2811-pgl. Use the range that matches
  31 *     your board configuration and the desired gain to correctly convert
  32 *     between data values and physical units and to set the correct output
  33 *     gain.
  34 *   - D/A ranges are not programmable. The AO subdevice has a range_table
  35 *     containing all the possible analog output ranges. Use the range
  36 *     that matches your board configuration to convert between data
  37 *     values and physical units.
  38 */
  39
  40#include <linux/module.h>
  41#include <linux/interrupt.h>
  42#include <linux/delay.h>
  43
  44#include "../comedidev.h"
  45
  46/*
  47 * Register I/O map
  48 */
  49#define DT2811_ADCSR_REG                0x00    /* r/w  A/D Control/Status */
  50#define DT2811_ADCSR_ADDONE             BIT(7)  /* r      1=A/D conv done */
  51#define DT2811_ADCSR_ADERROR            BIT(6)  /* r      1=A/D error */
  52#define DT2811_ADCSR_ADBUSY             BIT(5)  /* r      1=A/D busy */
  53#define DT2811_ADCSR_CLRERROR           BIT(4)
  54#define DT2811_ADCSR_DMAENB             BIT(3)  /* r/w    1=dma ena */
  55#define DT2811_ADCSR_INTENB             BIT(2)  /* r/w    1=interupts ena */
  56#define DT2811_ADCSR_ADMODE(x)          (((x) & 0x3) << 0)
  57
  58#define DT2811_ADGCR_REG                0x01    /* r/w  A/D Gain/Channel */
  59#define DT2811_ADGCR_GAIN(x)            (((x) & 0x3) << 6)
  60#define DT2811_ADGCR_CHAN(x)            (((x) & 0xf) << 0)
  61
  62#define DT2811_ADDATA_LO_REG            0x02    /* r   A/D Data low byte */
  63#define DT2811_ADDATA_HI_REG            0x03    /* r   A/D Data high byte */
  64
  65#define DT2811_DADATA_LO_REG(x)         (0x02 + ((x) * 2)) /* w D/A Data low */
  66#define DT2811_DADATA_HI_REG(x)         (0x03 + ((x) * 2)) /* w D/A Data high */
  67
  68#define DT2811_DI_REG                   0x06    /* r   Digital Input Port 0 */
  69#define DT2811_DO_REG                   0x06    /* w   Digital Output Port 1 */
  70
  71#define DT2811_TMRCTR_REG               0x07    /* r/w  Timer/Counter */
  72#define DT2811_TMRCTR_MANTISSA(x)       (((x) & 0x7) << 3)
  73#define DT2811_TMRCTR_EXPONENT(x)       (((x) & 0x7) << 0)
  74
  75#define DT2811_OSC_BASE                 1666    /* 600 kHz = 1666.6667ns */
  76
  77/*
  78 * Timer frequency control:
  79 *   DT2811_TMRCTR_MANTISSA     DT2811_TMRCTR_EXPONENT
  80 *   val  divisor  frequency    val  multiply divisor/divide frequency by
  81 *    0      1      600 kHz      0   1
  82 *    1     10       60 kHz      1   10
  83 *    2      2      300 kHz      2   100
  84 *    3      3      200 kHz      3   1000
  85 *    4      4      150 kHz      4   10000
  86 *    5      5      120 kHz      5   100000
  87 *    6      6      100 kHz      6   1000000
  88 *    7     12       50 kHz      7   10000000
  89 */
  90static const unsigned int dt2811_clk_dividers[] = {
  91        1, 10, 2, 3, 4, 5, 6, 12
  92};
  93
  94static const unsigned int dt2811_clk_multipliers[] = {
  95        1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
  96};
  97
  98/*
  99 * The Analog Input range is set using jumpers on the board.
 100 *
 101 * Input Range          W9  W10
 102 * -5V to +5V           In  Out
 103 * -2.5V to +2.5V       In  In
 104 * 0V to +5V            Out In
 105 *
 106 * The gain may be set to 1, 2, 4, or 8 (on the dt2811-pgh) or to
 107 * 1, 10, 100, 500 (on the dt2811-pgl).
 108 */
 109static const struct comedi_lrange dt2811_pgh_ai_ranges = {
 110        12, {
 111                BIP_RANGE(5),           /* range 0: gain=1 */
 112                BIP_RANGE(2.5),         /* range 1: gain=2 */
 113                BIP_RANGE(1.25),        /* range 2: gain=4 */
 114                BIP_RANGE(0.625),       /* range 3: gain=8 */
 115
 116                BIP_RANGE(2.5),         /* range 0+4: gain=1 */
 117                BIP_RANGE(1.25),        /* range 1+4: gain=2 */
 118                BIP_RANGE(0.625),       /* range 2+4: gain=4 */
 119                BIP_RANGE(0.3125),      /* range 3+4: gain=8 */
 120
 121                UNI_RANGE(5),           /* range 0+8: gain=1 */
 122                UNI_RANGE(2.5),         /* range 1+8: gain=2 */
 123                UNI_RANGE(1.25),        /* range 2+8: gain=4 */
 124                UNI_RANGE(0.625)        /* range 3+8: gain=8 */
 125        }
 126};
 127
 128static const struct comedi_lrange dt2811_pgl_ai_ranges = {
 129        12, {
 130                BIP_RANGE(5),           /* range 0: gain=1 */
 131                BIP_RANGE(0.5),         /* range 1: gain=10 */
 132                BIP_RANGE(0.05),        /* range 2: gain=100 */
 133                BIP_RANGE(0.01),        /* range 3: gain=500 */
 134
 135                BIP_RANGE(2.5),         /* range 0+4: gain=1 */
 136                BIP_RANGE(0.25),        /* range 1+4: gain=10 */
 137                BIP_RANGE(0.025),       /* range 2+4: gain=100 */
 138                BIP_RANGE(0.005),       /* range 3+4: gain=500 */
 139
 140                UNI_RANGE(5),           /* range 0+8: gain=1 */
 141                UNI_RANGE(0.5),         /* range 1+8: gain=10 */
 142                UNI_RANGE(0.05),        /* range 2+8: gain=100 */
 143                UNI_RANGE(0.01)         /* range 3+8: gain=500 */
 144        }
 145};
 146
 147/*
 148 * The Analog Output range is set per-channel using jumpers on the board.
 149 *
 150 *                      DAC0 Jumpers            DAC1 Jumpers
 151 * Output Range         W5  W6  W7  W8          W1  W2  W3  W4
 152 * -5V to +5V           In  Out In  Out         In  Out In  Out
 153 * -2.5V to +2.5V       In  Out Out In          In  Out Out In
 154 * 0 to +5V             Out In  Out In          Out In  Out In
 155 */
 156static const struct comedi_lrange dt2811_ao_ranges = {
 157        3, {
 158                BIP_RANGE(5),   /* default setting from factory */
 159                BIP_RANGE(2.5),
 160                UNI_RANGE(5)
 161        }
 162};
 163
 164struct dt2811_board {
 165        const char *name;
 166        unsigned int is_pgh:1;
 167};
 168
 169static const struct dt2811_board dt2811_boards[] = {
 170        {
 171                .name           = "dt2811-pgh",
 172                .is_pgh         = 1,
 173        }, {
 174                .name           = "dt2811-pgl",
 175        },
 176};
 177
 178struct dt2811_private {
 179        unsigned int ai_divisor;
 180};
 181
 182static unsigned int dt2811_ai_read_sample(struct comedi_device *dev,
 183                                          struct comedi_subdevice *s)
 184{
 185        unsigned int val;
 186
 187        val = inb(dev->iobase + DT2811_ADDATA_LO_REG) |
 188              (inb(dev->iobase + DT2811_ADDATA_HI_REG) << 8);
 189
 190        return val & s->maxdata;
 191}
 192
 193static irqreturn_t dt2811_interrupt(int irq, void *d)
 194{
 195        struct comedi_device *dev = d;
 196        struct comedi_subdevice *s = dev->read_subdev;
 197        struct comedi_async *async = s->async;
 198        struct comedi_cmd *cmd = &async->cmd;
 199        unsigned int status;
 200
 201        if (!dev->attached)
 202                return IRQ_NONE;
 203
 204        status = inb(dev->iobase + DT2811_ADCSR_REG);
 205
 206        if (status & DT2811_ADCSR_ADERROR) {
 207                async->events |= COMEDI_CB_OVERFLOW;
 208
 209                outb(status | DT2811_ADCSR_CLRERROR,
 210                     dev->iobase + DT2811_ADCSR_REG);
 211        }
 212
 213        if (status & DT2811_ADCSR_ADDONE) {
 214                unsigned short val;
 215
 216                val = dt2811_ai_read_sample(dev, s);
 217                comedi_buf_write_samples(s, &val, 1);
 218        }
 219
 220        if (cmd->stop_src == TRIG_COUNT && async->scans_done >= cmd->stop_arg)
 221                async->events |= COMEDI_CB_EOA;
 222
 223        comedi_handle_events(dev, s);
 224
 225        return IRQ_HANDLED;
 226}
 227
 228static int dt2811_ai_cancel(struct comedi_device *dev,
 229                            struct comedi_subdevice *s)
 230{
 231        /*
 232         * Mode 0
 233         * Single conversion
 234         *
 235         * Loading a chanspec will trigger a conversion.
 236         */
 237        outb(DT2811_ADCSR_ADMODE(0), dev->iobase + DT2811_ADCSR_REG);
 238
 239        return 0;
 240}
 241
 242static void dt2811_ai_set_chanspec(struct comedi_device *dev,
 243                                   unsigned int chanspec)
 244{
 245        unsigned int chan = CR_CHAN(chanspec);
 246        unsigned int range = CR_RANGE(chanspec);
 247
 248        outb(DT2811_ADGCR_CHAN(chan) | DT2811_ADGCR_GAIN(range),
 249             dev->iobase + DT2811_ADGCR_REG);
 250}
 251
 252static int dt2811_ai_cmd(struct comedi_device *dev,
 253                         struct comedi_subdevice *s)
 254{
 255        struct dt2811_private *devpriv = dev->private;
 256        struct comedi_cmd *cmd = &s->async->cmd;
 257        unsigned int mode;
 258
 259        if (cmd->start_src == TRIG_NOW) {
 260                /*
 261                 * Mode 1
 262                 * Continuous conversion, internal trigger and clock
 263                 *
 264                 * This resets the trigger flip-flop, disabling A/D strobes.
 265                 * The timer/counter register is loaded with the division
 266                 * ratio which will give the required sample rate.
 267                 *
 268                 * Loading the first chanspec sets the trigger flip-flop,
 269                 * enabling the timer/counter. A/D strobes are then generated
 270                 * at the rate set by the internal clock/divider.
 271                 */
 272                mode = DT2811_ADCSR_ADMODE(1);
 273        } else { /* TRIG_EXT */
 274                if (cmd->convert_src == TRIG_TIMER) {
 275                        /*
 276                         * Mode 2
 277                         * Continuous conversion, external trigger
 278                         *
 279                         * Similar to Mode 1, with the exception that the
 280                         * trigger flip-flop must be set by a negative edge
 281                         * on the external trigger input.
 282                         */
 283                        mode = DT2811_ADCSR_ADMODE(2);
 284                } else { /* TRIG_EXT */
 285                        /*
 286                         * Mode 3
 287                         * Continuous conversion, external trigger, clock
 288                         *
 289                         * Similar to Mode 2, with the exception that the
 290                         * conversion rate is set by the frequency on the
 291                         * external clock/divider.
 292                         */
 293                        mode = DT2811_ADCSR_ADMODE(3);
 294                }
 295        }
 296        outb(mode | DT2811_ADCSR_INTENB, dev->iobase + DT2811_ADCSR_REG);
 297
 298        /* load timer */
 299        outb(devpriv->ai_divisor, dev->iobase + DT2811_TMRCTR_REG);
 300
 301        /* load chanspec - enables timer */
 302        dt2811_ai_set_chanspec(dev, cmd->chanlist[0]);
 303
 304        return 0;
 305}
 306
 307static unsigned int dt2811_ns_to_timer(unsigned int *nanosec,
 308                                       unsigned int flags)
 309{
 310        unsigned long long ns;
 311        unsigned int ns_lo = COMEDI_MIN_SPEED;
 312        unsigned int ns_hi = 0;
 313        unsigned int divisor_hi = 0;
 314        unsigned int divisor_lo = 0;
 315        unsigned int _div;
 316        unsigned int _mult;
 317
 318        /*
 319         * Work through all the divider/multiplier values to find the two
 320         * closest divisors to generate the requested nanosecond timing.
 321         */
 322        for (_div = 0; _div <= 7; _div++) {
 323                for (_mult = 0; _mult <= 7; _mult++) {
 324                        unsigned int div = dt2811_clk_dividers[_div];
 325                        unsigned int mult = dt2811_clk_multipliers[_mult];
 326                        unsigned long long divider = div * mult;
 327                        unsigned int divisor = DT2811_TMRCTR_MANTISSA(_div) |
 328                                               DT2811_TMRCTR_EXPONENT(_mult);
 329
 330                        /*
 331                         * The timer can be configured to run at a slowest
 332                         * speed of 0.005hz (600 Khz/120000000), which requires
 333                         * 37-bits to represent the nanosecond value. Limit the
 334                         * slowest timing to what comedi handles (32-bits).
 335                         */
 336                        ns = divider * DT2811_OSC_BASE;
 337                        if (ns > COMEDI_MIN_SPEED)
 338                                continue;
 339
 340                        /* Check for fastest found timing */
 341                        if (ns <= *nanosec && ns > ns_hi) {
 342                                ns_hi = ns;
 343                                divisor_hi = divisor;
 344                        }
 345                        /* Check for slowest found timing */
 346                        if (ns >= *nanosec && ns < ns_lo) {
 347                                ns_lo = ns;
 348                                divisor_lo = divisor;
 349                        }
 350                }
 351        }
 352
 353        /*
 354         * The slowest found timing will be invalid if the requested timing
 355         * is faster than what can be generated by the timer. Fix it so that
 356         * CMDF_ROUND_UP returns valid timing.
 357         */
 358        if (ns_lo == COMEDI_MIN_SPEED) {
 359                ns_lo = ns_hi;
 360                divisor_lo = divisor_hi;
 361        }
 362        /*
 363         * The fastest found timing will be invalid if the requested timing
 364         * is less than what can be generated by the timer. Fix it so that
 365         * CMDF_ROUND_NEAREST and CMDF_ROUND_DOWN return valid timing.
 366         */
 367        if (ns_hi == 0) {
 368                ns_hi = ns_lo;
 369                divisor_hi = divisor_lo;
 370        }
 371
 372        switch (flags & CMDF_ROUND_MASK) {
 373        case CMDF_ROUND_NEAREST:
 374        default:
 375                if (ns_hi - *nanosec < *nanosec - ns_lo) {
 376                        *nanosec = ns_lo;
 377                        return divisor_lo;
 378                }
 379                *nanosec = ns_hi;
 380                return divisor_hi;
 381        case CMDF_ROUND_UP:
 382                *nanosec = ns_lo;
 383                return divisor_lo;
 384        case CMDF_ROUND_DOWN:
 385                *nanosec = ns_hi;
 386                return divisor_hi;
 387        }
 388}
 389
 390static int dt2811_ai_cmdtest(struct comedi_device *dev,
 391                             struct comedi_subdevice *s,
 392                             struct comedi_cmd *cmd)
 393{
 394        struct dt2811_private *devpriv = dev->private;
 395        unsigned int arg;
 396        int err = 0;
 397
 398        /* Step 1 : check if triggers are trivially valid */
 399
 400        err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT);
 401        err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
 402        err |= comedi_check_trigger_src(&cmd->convert_src,
 403                                        TRIG_TIMER | TRIG_EXT);
 404        err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
 405        err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
 406
 407        if (err)
 408                return 1;
 409
 410        /* Step 2a : make sure trigger sources are unique */
 411
 412        err |= comedi_check_trigger_is_unique(cmd->start_src);
 413        err |= comedi_check_trigger_is_unique(cmd->convert_src);
 414        err |= comedi_check_trigger_is_unique(cmd->stop_src);
 415
 416        /* Step 2b : and mutually compatible */
 417
 418        if (cmd->convert_src == TRIG_EXT && cmd->start_src != TRIG_EXT)
 419                err |= -EINVAL;
 420
 421        if (err)
 422                return 2;
 423
 424        /* Step 3: check if arguments are trivially valid */
 425
 426        err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
 427        err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 428        if (cmd->convert_src == TRIG_TIMER)
 429                err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 12500);
 430        err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
 431                                           cmd->chanlist_len);
 432        if (cmd->stop_src == TRIG_COUNT)
 433                err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
 434        else    /* TRIG_NONE */
 435                err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
 436
 437        if (err)
 438                return 3;
 439
 440        /* Step 4: fix up any arguments */
 441
 442        if (cmd->convert_src == TRIG_TIMER) {
 443                arg = cmd->convert_arg;
 444                devpriv->ai_divisor = dt2811_ns_to_timer(&arg, cmd->flags);
 445                err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
 446        } else { /* TRIG_EXT */
 447                /* The convert_arg is used to set the divisor. */
 448                devpriv->ai_divisor = cmd->convert_arg;
 449        }
 450
 451        if (err)
 452                return 4;
 453
 454        /* Step 5: check channel list if it exists */
 455
 456        return 0;
 457}
 458
 459static int dt2811_ai_eoc(struct comedi_device *dev,
 460                         struct comedi_subdevice *s,
 461                         struct comedi_insn *insn,
 462                         unsigned long context)
 463{
 464        unsigned int status;
 465
 466        status = inb(dev->iobase + DT2811_ADCSR_REG);
 467        if ((status & DT2811_ADCSR_ADBUSY) == 0)
 468                return 0;
 469        return -EBUSY;
 470}
 471
 472static int dt2811_ai_insn_read(struct comedi_device *dev,
 473                               struct comedi_subdevice *s,
 474                               struct comedi_insn *insn,
 475                               unsigned int *data)
 476{
 477        int ret;
 478        int i;
 479
 480        /* We will already be in Mode 0 */
 481        for (i = 0; i < insn->n; i++) {
 482                /* load chanspec and trigger conversion */
 483                dt2811_ai_set_chanspec(dev, insn->chanspec);
 484
 485                ret = comedi_timeout(dev, s, insn, dt2811_ai_eoc, 0);
 486                if (ret)
 487                        return ret;
 488
 489                data[i] = dt2811_ai_read_sample(dev, s);
 490        }
 491
 492        return insn->n;
 493}
 494
 495static int dt2811_ao_insn_write(struct comedi_device *dev,
 496                                struct comedi_subdevice *s,
 497                                struct comedi_insn *insn,
 498                                unsigned int *data)
 499{
 500        unsigned int chan = CR_CHAN(insn->chanspec);
 501        unsigned int val = s->readback[chan];
 502        int i;
 503
 504        for (i = 0; i < insn->n; i++) {
 505                val = data[i];
 506                outb(val & 0xff, dev->iobase + DT2811_DADATA_LO_REG(chan));
 507                outb((val >> 8) & 0xff,
 508                     dev->iobase + DT2811_DADATA_HI_REG(chan));
 509        }
 510        s->readback[chan] = val;
 511
 512        return insn->n;
 513}
 514
 515static int dt2811_di_insn_bits(struct comedi_device *dev,
 516                               struct comedi_subdevice *s,
 517                               struct comedi_insn *insn,
 518                               unsigned int *data)
 519{
 520        data[1] = inb(dev->iobase + DT2811_DI_REG);
 521
 522        return insn->n;
 523}
 524
 525static int dt2811_do_insn_bits(struct comedi_device *dev,
 526                               struct comedi_subdevice *s,
 527                               struct comedi_insn *insn,
 528                               unsigned int *data)
 529{
 530        if (comedi_dio_update_state(s, data))
 531                outb(s->state, dev->iobase + DT2811_DO_REG);
 532
 533        data[1] = s->state;
 534
 535        return insn->n;
 536}
 537
 538static void dt2811_reset(struct comedi_device *dev)
 539{
 540        /* This is the initialization sequence from the users manual */
 541        outb(DT2811_ADCSR_ADMODE(0), dev->iobase + DT2811_ADCSR_REG);
 542        usleep_range(100, 1000);
 543        inb(dev->iobase + DT2811_ADDATA_LO_REG);
 544        inb(dev->iobase + DT2811_ADDATA_HI_REG);
 545        outb(DT2811_ADCSR_ADMODE(0) | DT2811_ADCSR_CLRERROR,
 546             dev->iobase + DT2811_ADCSR_REG);
 547}
 548
 549static int dt2811_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 550{
 551        const struct dt2811_board *board = dev->board_ptr;
 552        struct dt2811_private *devpriv;
 553        struct comedi_subdevice *s;
 554        int ret;
 555
 556        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 557        if (!devpriv)
 558                return -ENOMEM;
 559
 560        ret = comedi_request_region(dev, it->options[0], 0x8);
 561        if (ret)
 562                return ret;
 563
 564        dt2811_reset(dev);
 565
 566        /* IRQ's 2,3,5,7 are valid for async command support */
 567        if (it->options[1] <= 7  && (BIT(it->options[1]) & 0xac)) {
 568                ret = request_irq(it->options[1], dt2811_interrupt, 0,
 569                                  dev->board_name, dev);
 570                if (ret == 0)
 571                        dev->irq = it->options[1];
 572        }
 573
 574        ret = comedi_alloc_subdevices(dev, 4);
 575        if (ret)
 576                return ret;
 577
 578        /* Analog Input subdevice */
 579        s = &dev->subdevices[0];
 580        s->type         = COMEDI_SUBD_AI;
 581        s->subdev_flags = SDF_READABLE |
 582                          ((it->options[2] == 1) ? SDF_DIFF :
 583                           (it->options[2] == 2) ? SDF_COMMON : SDF_GROUND);
 584        s->n_chan       = (it->options[2] == 1) ? 8 : 16;
 585        s->maxdata      = 0x0fff;
 586        s->range_table  = board->is_pgh ? &dt2811_pgh_ai_ranges
 587                                        : &dt2811_pgl_ai_ranges;
 588        s->insn_read    = dt2811_ai_insn_read;
 589        if (dev->irq) {
 590                dev->read_subdev = s;
 591                s->subdev_flags |= SDF_CMD_READ;
 592                s->len_chanlist = 1;
 593                s->do_cmdtest   = dt2811_ai_cmdtest;
 594                s->do_cmd       = dt2811_ai_cmd;
 595                s->cancel       = dt2811_ai_cancel;
 596        }
 597
 598        /* Analog Output subdevice */
 599        s = &dev->subdevices[1];
 600        s->type         = COMEDI_SUBD_AO;
 601        s->subdev_flags = SDF_WRITABLE;
 602        s->n_chan       = 2;
 603        s->maxdata      = 0x0fff;
 604        s->range_table  = &dt2811_ao_ranges;
 605        s->insn_write   = dt2811_ao_insn_write;
 606
 607        ret = comedi_alloc_subdev_readback(s);
 608        if (ret)
 609                return ret;
 610
 611        /* Digital Input subdevice */
 612        s = &dev->subdevices[2];
 613        s->type         = COMEDI_SUBD_DI;
 614        s->subdev_flags = SDF_READABLE;
 615        s->n_chan       = 8;
 616        s->maxdata      = 1;
 617        s->range_table  = &range_digital;
 618        s->insn_bits    = dt2811_di_insn_bits;
 619
 620        /* Digital Output subdevice */
 621        s = &dev->subdevices[3];
 622        s->type         = COMEDI_SUBD_DO;
 623        s->subdev_flags = SDF_WRITABLE;
 624        s->n_chan       = 8;
 625        s->maxdata      = 1;
 626        s->range_table  = &range_digital;
 627        s->insn_bits    = dt2811_do_insn_bits;
 628
 629        return 0;
 630}
 631
 632static struct comedi_driver dt2811_driver = {
 633        .driver_name    = "dt2811",
 634        .module         = THIS_MODULE,
 635        .attach         = dt2811_attach,
 636        .detach         = comedi_legacy_detach,
 637        .board_name     = &dt2811_boards[0].name,
 638        .num_names      = ARRAY_SIZE(dt2811_boards),
 639        .offset         = sizeof(struct dt2811_board),
 640};
 641module_comedi_driver(dt2811_driver);
 642
 643MODULE_AUTHOR("Comedi http://www.comedi.org");
 644MODULE_DESCRIPTION("Comedi driver for Data Translation DT2811 series boards");
 645MODULE_LICENSE("GPL");
 646