drivers/staging/comedi/drivers/ni_daq_700.c

   1 /*
   2  *     comedi/drivers/ni_daq_700.c
   3  *     Driver for DAQCard-700 DIO only
   4  *     copied from 8255
   5  *
   6  *     COMEDI - Linux Control and Measurement Device Interface
   7  *     Copyright (C) 1998 David A. Schleef <ds@schleef.org>
   8  *
   9  *     This program is free software; you can redistribute it and/or modify
  10  *     it under the terms of the GNU General Public License as published by
  11  *     the Free Software Foundation; either version 2 of the License, or
  12  *     (at your option) any later version.
  13  *
  14  *     This program is distributed in the hope that it will be useful,
  15  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *     GNU General Public License for more details.
  18  *
  19  *     You should have received a copy of the GNU General Public License
  20  *     along with this program; if not, write to the Free Software
  21  *     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  */
  24
  25 /*
  26 Driver: ni_daq_700
  27 Description: National Instruments PCMCIA DAQCard-700 DIO only
  28 Author: Fred Brooks <nsaspook@nsaspook.com>,
  29   based on ni_daq_dio24 by Daniel Vecino Castel <dvecino@able.es>
  30 Devices: [National Instruments] PCMCIA DAQ-Card-700 (ni_daq_700)
  31 Status: works
  32 Updated: Thu, 21 Feb 2008 12:07:20 +0000
  33
  34 The daqcard-700 appears in Comedi as a single digital I/O subdevice with
  35 16 channels.  The channel 0 corresponds to the daqcard-700's output
  36 port, bit 0; channel 8 corresponds to the input port, bit 0.
  37
  38 Direction configuration: channels 0-7 output, 8-15 input (8225 device
  39 emu as port A output, port B input, port C N/A).
  40
  41 IRQ is assigned but not used.
  42 */
  43
  44 #include <linux/interrupt.h>
  45 #include <linux/slab.h>
  46 #include "../comedidev.h"
  47
  48 #include <linux/ioport.h>
  49
  50 #include <pcmcia/cs.h>
  51 #include <pcmcia/cistpl.h>
  52 #include <pcmcia/cisreg.h>
  53 #include <pcmcia/ds.h>
  54
  55 static struct pcmcia_device *pcmcia_cur_dev = NULL;
  56
  57 #define DIO700_SIZE 8           /*  size of io region used by board */
  58
  59 static int dio700_attach(struct comedi_device *dev,
  60                          struct comedi_devconfig *it);
  61 static int dio700_detach(struct comedi_device *dev);
  62
  63 enum dio700_bustype { pcmcia_bustype };
  64
  65 struct dio700_board {
  66         const char *name;
  67         int device_id;          /*  device id for pcmcia board */
  68         enum dio700_bustype bustype;    /*  PCMCIA */
  69         int have_dio;           /*  have daqcard-700 dio */
  70         /*  function pointers so we can use inb/outb or readb/writeb */
  71         /*  as appropriate */
  72         unsigned int (*read_byte) (unsigned int address);
  73         void (*write_byte) (unsigned int byte, unsigned int address);
  74 };
  75
  76 static const struct dio700_board dio700_boards[] = {
  77         {
  78          .name = "daqcard-700",
  79           /*  0x10b is manufacturer id, 0x4743 is device id */
  80          .device_id = 0x4743,
  81          .bustype = pcmcia_bustype,
  82          .have_dio = 1,
  83          },
  84         {
  85          .name = "ni_daq_700",
  86           /*  0x10b is manufacturer id, 0x4743 is device id */
  87          .device_id = 0x4743,
  88          .bustype = pcmcia_bustype,
  89          .have_dio = 1,
  90          },
  91 };
  92
  93 /*
  94  * Useful for shorthand access to the particular board structure
  95  */
  96 #define thisboard ((const struct dio700_board *)dev->board_ptr)
  97
  98 struct dio700_private {
  99
 100         int data;               /* number of data points left to be taken */
 101 };
 102
 103 #define devpriv ((struct dio700_private *)dev->private)
 104
 105 static struct comedi_driver driver_dio700 = {
 106         .driver_name = "ni_daq_700",
 107         .module = THIS_MODULE,
 108         .attach = dio700_attach,
 109         .detach = dio700_detach,
 110         .num_names = ARRAY_SIZE(dio700_boards),
 111         .board_name = &dio700_boards[0].name,
 112         .offset = sizeof(struct dio700_board),
 113 };
 114
 115 /*      the real driver routines        */
 116
 117 #define _700_SIZE 8
 118
 119 #define _700_DATA 0
 120
 121 #define DIO_W           0x04
 122 #define DIO_R           0x05
 123
 124 struct subdev_700_struct {
 125         unsigned long cb_arg;
 126         int (*cb_func) (int, int, int, unsigned long);
 127         int have_irq;
 128 };
 129
 130 #define CALLBACK_ARG    (((struct subdev_700_struct *)s->private)->cb_arg)
 131 #define CALLBACK_FUNC   (((struct subdev_700_struct *)s->private)->cb_func)
 132 #define subdevpriv      ((struct subdev_700_struct *)s->private)
 133
 134 static void do_config(struct comedi_device *dev, struct comedi_subdevice *s);
 135
 136 void subdev_700_interrupt(struct comedi_device *dev, struct comedi_subdevice *s)
 137 {
 138         short d;
 139
 140         d = CALLBACK_FUNC(0, _700_DATA, 0, CALLBACK_ARG);
 141
 142         comedi_buf_put(s->async, d);
 143         s->async->events |= COMEDI_CB_EOS;
 144
 145         comedi_event(dev, s);
 146 }
 147 EXPORT_SYMBOL(subdev_700_interrupt);
 148
 149 static int subdev_700_cb(int dir, int port, int data, unsigned long arg)
 150 {
 151         /* port is always A for output and B for input (8255 emu) */
 152         unsigned long iobase = arg;
 153
 154         if (dir) {
 155                 outb(data, iobase + DIO_W);
 156                 return 0;
 157         } else {
 158                 return inb(iobase + DIO_R);
 159         }
 160 }
 161
 162 static int subdev_700_insn(struct comedi_device *dev,
 163                            struct comedi_subdevice *s, struct comedi_insn *insn,
 164                            unsigned int *data)
 165 {
 166         if (data[0]) {
 167                 s->state &= ~data[0];
 168                 s->state |= (data[0] & data[1]);
 169
 170                 if (data[0] & 0xff)
 171                         CALLBACK_FUNC(1, _700_DATA, s->state & 0xff,
 172                                       CALLBACK_ARG);
 173         }
 174
 175         data[1] = s->state & 0xff;
 176         data[1] |= CALLBACK_FUNC(0, _700_DATA, 0, CALLBACK_ARG) << 8;
 177
 178         return 2;
 179 }
 180
 181 static int subdev_700_insn_config(struct comedi_device *dev,
 182                                   struct comedi_subdevice *s,
 183                                   struct comedi_insn *insn, unsigned int *data)
 184 {
 185
 186         switch (data[0]) {
 187         case INSN_CONFIG_DIO_INPUT:
 188                 break;
 189         case INSN_CONFIG_DIO_OUTPUT:
 190                 break;
 191         case INSN_CONFIG_DIO_QUERY:
 192                 data[1] =
 193                     (s->
 194                      io_bits & (1 << CR_CHAN(insn->chanspec))) ? COMEDI_OUTPUT :
 195                     COMEDI_INPUT;
 196                 return insn->n;
 197                 break;
 198         default:
 199                 return -EINVAL;
 200         }
 201
 202         return 1;
 203 }
 204
 205 static void do_config(struct comedi_device *dev, struct comedi_subdevice *s)
 206 {                               /* use powerup defaults */
 207         return;
 208 }
 209
 210 static int subdev_700_cmdtest(struct comedi_device *dev,
 211                               struct comedi_subdevice *s,
 212                               struct comedi_cmd *cmd)
 213 {
 214         int err = 0;
 215         unsigned int tmp;
 216
 217         /* step 1 */
 218
 219         tmp = cmd->start_src;
 220         cmd->start_src &= TRIG_NOW;
 221         if (!cmd->start_src || tmp != cmd->start_src)
 222                 err++;
 223
 224         tmp = cmd->scan_begin_src;
 225         cmd->scan_begin_src &= TRIG_EXT;
 226         if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
 227                 err++;
 228
 229         tmp = cmd->convert_src;
 230         cmd->convert_src &= TRIG_FOLLOW;
 231         if (!cmd->convert_src || tmp != cmd->convert_src)
 232                 err++;
 233
 234         tmp = cmd->scan_end_src;
 235         cmd->scan_end_src &= TRIG_COUNT;
 236         if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
 237                 err++;
 238
 239         tmp = cmd->stop_src;
 240         cmd->stop_src &= TRIG_NONE;
 241         if (!cmd->stop_src || tmp != cmd->stop_src)
 242                 err++;
 243
 244         if (err)
 245                 return 1;
 246
 247         /* step 2 */
 248
 249         if (err)
 250                 return 2;
 251
 252         /* step 3 */
 253
 254         if (cmd->start_arg != 0) {
 255                 cmd->start_arg = 0;
 256                 err++;
 257         }
 258         if (cmd->scan_begin_arg != 0) {
 259                 cmd->scan_begin_arg = 0;
 260                 err++;
 261         }
 262         if (cmd->convert_arg != 0) {
 263                 cmd->convert_arg = 0;
 264                 err++;
 265         }
 266         if (cmd->scan_end_arg != 1) {
 267                 cmd->scan_end_arg = 1;
 268                 err++;
 269         }
 270         if (cmd->stop_arg != 0) {
 271                 cmd->stop_arg = 0;
 272                 err++;
 273         }
 274
 275         if (err)
 276                 return 3;
 277
 278         /* step 4 */
 279
 280         if (err)
 281                 return 4;
 282
 283         return 0;
 284 }
 285
 286 static int subdev_700_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 287 {
 288         /* FIXME */
 289
 290         return 0;
 291 }
 292
 293 static int subdev_700_cancel(struct comedi_device *dev,
 294                              struct comedi_subdevice *s)
 295 {
 296         /* FIXME */
 297
 298         return 0;
 299 }
 300
 301 int subdev_700_init(struct comedi_device *dev, struct comedi_subdevice *s,
 302                     int (*cb) (int, int, int, unsigned long), unsigned long arg)
 303 {
 304         s->type = COMEDI_SUBD_DIO;
 305         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 306         s->n_chan = 16;
 307         s->range_table = &range_digital;
 308         s->maxdata = 1;
 309
 310         s->private = kmalloc(sizeof(struct subdev_700_struct), GFP_KERNEL);
 311         if (!s->private)
 312                 return -ENOMEM;
 313
 314         CALLBACK_ARG = arg;
 315         if (cb == NULL)
 316                 CALLBACK_FUNC = subdev_700_cb;
 317          else
 318                 CALLBACK_FUNC = cb;
 319
 320         s->insn_bits = subdev_700_insn;
 321         s->insn_config = subdev_700_insn_config;
 322
 323         s->state = 0;
 324         s->io_bits = 0x00ff;
 325         do_config(dev, s);
 326
 327         return 0;
 328 }
 329 EXPORT_SYMBOL(subdev_700_init);
 330
 331 int subdev_700_init_irq(struct comedi_device *dev, struct comedi_subdevice *s,
 332                         int (*cb) (int, int, int, unsigned long),
 333                         unsigned long arg)
 334 {
 335         int ret;
 336
 337         ret = subdev_700_init(dev, s, cb, arg);
 338         if (ret < 0)
 339                 return ret;
 340
 341         s->do_cmdtest = subdev_700_cmdtest;
 342         s->do_cmd = subdev_700_cmd;
 343         s->cancel = subdev_700_cancel;
 344
 345         subdevpriv->have_irq = 1;
 346
 347         return 0;
 348 }
 349 EXPORT_SYMBOL(subdev_700_init_irq);
 350
 351 void subdev_700_cleanup(struct comedi_device *dev, struct comedi_subdevice *s)
 352 {
 353         if (s->private)
 354                 if (subdevpriv->have_irq)
 355
 356                         kfree(s->private);
 357 }
 358 EXPORT_SYMBOL(subdev_700_cleanup);
 359
 360 static int dio700_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 361 {
 362         struct comedi_subdevice *s;
 363         unsigned long iobase = 0;
 364 #ifdef incomplete
 365         unsigned int irq = 0;
 366 #endif
 367         struct pcmcia_device *link;
 368
 369         /* allocate and initialize dev->private */
 370         if (alloc_private(dev, sizeof(struct dio700_private)) < 0)
 371                 return -ENOMEM;
 372
 373         /*  get base address, irq etc. based on bustype */
 374         switch (thisboard->bustype) {
 375         case pcmcia_bustype:
 376                 link = pcmcia_cur_dev;  /* XXX hack */
 377                 if (!link)
 378                         return -EIO;
 379                 iobase = link->resource[0]->start;
 380 #ifdef incomplete
 381                 irq = link->irq;
 382 #endif
 383                 break;
 384         default:
 385                 printk("bug! couldn't determine board type\n");
 386                 return -EINVAL;
 387                 break;
 388         }
 389         printk("comedi%d: ni_daq_700: %s, io 0x%lx", dev->minor,
 390                thisboard->name, iobase);
 391 #ifdef incomplete
 392         if (irq)
 393                 printk(", irq %u", irq);
 394
 395 #endif
 396
 397         printk("\n");
 398
 399         if (iobase == 0) {
 400                 printk("io base address is zero!\n");
 401                 return -EINVAL;
 402         }
 403
 404         dev->iobase = iobase;
 405
 406 #ifdef incomplete
 407         /* grab our IRQ */
 408         dev->irq = irq;
 409 #endif
 410
 411         dev->board_name = thisboard->name;
 412
 413         if (alloc_subdevices(dev, 1) < 0)
 414                 return -ENOMEM;
 415
 416         /* DAQCard-700 dio */
 417         s = dev->subdevices + 0;
 418         subdev_700_init(dev, s, NULL, dev->iobase);
 419
 420         return 0;
 421 };
 422
 423 static int dio700_detach(struct comedi_device *dev)
 424 {
 425         printk("comedi%d: ni_daq_700: cs-remove\n", dev->minor);
 426
 427         if (dev->subdevices)
 428                 subdev_700_cleanup(dev, dev->subdevices + 0);
 429
 430         if (thisboard->bustype != pcmcia_bustype && dev->iobase)
 431                 release_region(dev->iobase, DIO700_SIZE);
 432         if (dev->irq)
 433                 free_irq(dev->irq, dev);
 434
 435         return 0;
 436 };
 437
 438 /* PCMCIA crap -- watch your words, please! */
 439
 440 static void dio700_config(struct pcmcia_device *link);
 441 static void dio700_release(struct pcmcia_device *link);
 442 static int dio700_cs_suspend(struct pcmcia_device *p_dev);
 443 static int dio700_cs_resume(struct pcmcia_device *p_dev);
 444
 445 /*
 446    The attach() and detach() entry points are used to create and destroy
 447    "instances" of the driver, where each instance represents everything
 448    needed to manage one actual PCMCIA card.
 449 */
 450
 451 static int dio700_cs_attach(struct pcmcia_device *);
 452 static void dio700_cs_detach(struct pcmcia_device *);
 453
 454 /*
 455    You'll also need to prototype all the functions that will actually
 456    be used to talk to your device.  See 'memory_cs' for a good example
 457    of a fully self-sufficient driver; the other drivers rely more or
 458    less on other parts of the kernel.
 459 */
 460
 461 struct local_info_t {
 462         struct pcmcia_device *link;
 463         int stop;
 464         struct bus_operations *bus;
 465 };
 466
 467 /*======================================================================
 468
 469     dio700_cs_attach() creates an "instance" of the driver, allocating
 470     local data structures for one device.  The device is registered
 471     with Card Services.
 472
 473     The dev_link structure is initialized, but we don't actually
 474     configure the card at this point -- we wait until we receive a
 475     card insertion event.
 476
 477 ======================================================================*/
 478
 479 static int dio700_cs_attach(struct pcmcia_device *link)
 480 {
 481         struct local_info_t *local;
 482
 483         printk(KERN_INFO "ni_daq_700:  cs-attach\n");
 484
 485         dev_dbg(&link->dev, "dio700_cs_attach()\n");
 486
 487         /* Allocate space for private device-specific data */
 488         local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
 489         if (!local)
 490                 return -ENOMEM;
 491         local->link = link;
 492         link->priv = local;
 493
 494         /*
 495            General socket configuration defaults can go here.  In this
 496            client, we assume very little, and rely on the CIS for almost
 497            everything.  In most clients, many details (i.e., number, sizes,
 498            and attributes of IO windows) are fixed by the nature of the
 499            device, and can be hard-wired here.
 500          */
 501         link->conf.Attributes = 0;
 502         link->conf.IntType = INT_MEMORY_AND_IO;
 503
 504         pcmcia_cur_dev = link;
 505
 506         dio700_config(link);
 507
 508         return 0;
 509 }                               /* dio700_cs_attach */
 510
 511 /*======================================================================
 512
 513     This deletes a driver "instance".  The device is de-registered
 514     with Card Services.  If it has been released, all local data
 515     structures are freed.  Otherwise, the structures will be freed
 516     when the device is released.
 517
 518 ======================================================================*/
 519
 520 static void dio700_cs_detach(struct pcmcia_device *link)
 521 {
 522
 523         printk(KERN_INFO "ni_daq_700: cs-detach!\n");
 524
 525         dev_dbg(&link->dev, "dio700_cs_detach\n");
 526
 527         ((struct local_info_t *)link->priv)->stop = 1;
 528         dio700_release(link);
 529
 530         /* This points to the parent struct local_info_t struct */
 531         kfree(link->priv);
 532
 533 }                               /* dio700_cs_detach */
 534
 535 /*======================================================================
 536
 537     dio700_config() is scheduled to run after a CARD_INSERTION event
 538     is received, to configure the PCMCIA socket, and to make the
 539     device available to the system.
 540
 541 ======================================================================*/
 542
 543 static int dio700_pcmcia_config_loop(struct pcmcia_device *p_dev,
 544                                 cistpl_cftable_entry_t *cfg,
 545                                 cistpl_cftable_entry_t *dflt,
 546                                 unsigned int vcc,
 547                                 void *priv_data)
 548 {
 549         if (cfg->index == 0)
 550                 return -ENODEV;
 551
 552         /* Does this card need audio output? */
 553         if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
 554                 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
 555                 p_dev->conf.Status = CCSR_AUDIO_ENA;
 556         }
 557
 558         /* Do we need to allocate an interrupt? */
 559         p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 560
 561         /* IO window settings */
 562         p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
 563         if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
 564                 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
 565                 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
 566                 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 567                 p_dev->resource[0]->flags |=
 568                         pcmcia_io_cfg_data_width(io->flags);
 569                 p_dev->resource[0]->start = io->win[0].base;
 570                 p_dev->resource[0]->end = io->win[0].len;
 571                 if (io->nwin > 1) {
 572                         p_dev->resource[1]->flags = p_dev->resource[0]->flags;
 573                         p_dev->resource[1]->start = io->win[1].base;
 574                         p_dev->resource[1]->end = io->win[1].len;
 575                 }
 576                 /* This reserves IO space but doesn't actually enable it */
 577                 if (pcmcia_request_io(p_dev) != 0)
 578                         return -ENODEV;
 579         }
 580
 581         /* If we got this far, we're cool! */
 582         return 0;
 583 }
 584
 585 static void dio700_config(struct pcmcia_device *link)
 586 {
 587         win_req_t req;
 588         int ret;
 589
 590         printk(KERN_INFO "ni_daq_700:  cs-config\n");
 591
 592         dev_dbg(&link->dev, "dio700_config\n");
 593
 594         ret = pcmcia_loop_config(link, dio700_pcmcia_config_loop, NULL);
 595         if (ret) {
 596                 dev_warn(&link->dev, "no configuration found\n");
 597                 goto failed;
 598         }
 599
 600         if (!link->irq)
 601                 goto failed;
 602
 603         /*
 604            This actually configures the PCMCIA socket -- setting up
 605            the I/O windows and the interrupt mapping, and putting the
 606            card and host interface into "Memory and IO" mode.
 607          */
 608         ret = pcmcia_request_configuration(link, &link->conf);
 609         if (ret != 0)
 610                 goto failed;
 611
 612         /* Finally, report what we've done */
 613         dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex);
 614         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 615                 printk(", irq %d", link->irq);
 616         if (link->resource[0])
 617                 printk(", io %pR", link->resource[0]);
 618         if (link->resource[1])
 619                 printk(" & %pR", link->resource[1]);
 620         printk("\n");
 621
 622         return;
 623
 624 failed:
 625         printk(KERN_INFO "ni_daq_700 cs failed");
 626         dio700_release(link);
 627
 628 }                               /* dio700_config */
 629
 630 static void dio700_release(struct pcmcia_device *link)
 631 {
 632         dev_dbg(&link->dev, "dio700_release\n");
 633
 634         pcmcia_disable_device(link);
 635 }                               /* dio700_release */
 636
 637 /*======================================================================
 638
 639     The card status event handler.  Mostly, this schedules other
 640     stuff to run after an event is received.
 641
 642     When a CARD_REMOVAL event is received, we immediately set a
 643     private flag to block future accesses to this device.  All the
 644     functions that actually access the device should check this flag
 645     to make sure the card is still present.
 646
 647 ======================================================================*/
 648
 649 static int dio700_cs_suspend(struct pcmcia_device *link)
 650 {
 651         struct local_info_t *local = link->priv;
 652
 653         /* Mark the device as stopped, to block IO until later */
 654         local->stop = 1;
 655         return 0;
 656 }                               /* dio700_cs_suspend */
 657
 658 static int dio700_cs_resume(struct pcmcia_device *link)
 659 {
 660         struct local_info_t *local = link->priv;
 661
 662         local->stop = 0;
 663         return 0;
 664 }                               /* dio700_cs_resume */
 665
 666 /*====================================================================*/
 667
 668 static struct pcmcia_device_id dio700_cs_ids[] = {
 669         /* N.B. These IDs should match those in dio700_boards */
 670         PCMCIA_DEVICE_MANF_CARD(0x010b, 0x4743),        /* daqcard-700 */
 671         PCMCIA_DEVICE_NULL
 672 };
 673
 674
 675 MODULE_DEVICE_TABLE(pcmcia, dio700_cs_ids);
 676 MODULE_AUTHOR("Fred Brooks <nsaspook@nsaspook.com>");
 677 MODULE_DESCRIPTION("Comedi driver for National Instruments "
 678                    "PCMCIA DAQCard-700 DIO");
 679 MODULE_LICENSE("GPL");
 680
 681 struct pcmcia_driver dio700_cs_driver = {
 682         .probe = dio700_cs_attach,
 683         .remove = dio700_cs_detach,
 684         .suspend = dio700_cs_suspend,
 685         .resume = dio700_cs_resume,
 686         .id_table = dio700_cs_ids,
 687         .owner = THIS_MODULE,
 688         .drv = {
 689                 .name = "ni_daq_700",
 690                 },
 691 };
 692
 693 static int __init init_dio700_cs(void)
 694 {
 695         pcmcia_register_driver(&dio700_cs_driver);
 696         return 0;
 697 }
 698
 699 static void __exit exit_dio700_cs(void)
 700 {
 701         pr_debug("ni_daq_700: unloading\n");
 702         pcmcia_unregister_driver(&dio700_cs_driver);
 703 }
 704
 705 int __init init_module(void)
 706 {
 707         int ret;
 708
 709         ret = init_dio700_cs();
 710         if (ret < 0)
 711                 return ret;
 712
 713         return comedi_driver_register(&driver_dio700);
 714 }
 715
 716 void __exit cleanup_module(void)
 717 {
 718         exit_dio700_cs();
 719         comedi_driver_unregister(&driver_dio700);
 720 }