linux/drivers/staging/comedi/drivers/contec_pci_dio.c
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   1/*
   2    comedi/drivers/contec_pci_dio.c
   3
   4    COMEDI - Linux Control and Measurement Device Interface
   5    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16*/
  17/*
  18Driver: contec_pci_dio
  19Description: Contec PIO1616L digital I/O board
  20Devices: [Contec] PIO1616L (contec_pci_dio)
  21Author: Stefano Rivoir <s.rivoir@gts.it>
  22Updated: Wed, 27 Jun 2007 13:00:06 +0100
  23Status: works
  24
  25Configuration Options: not applicable, uses comedi PCI auto config
  26*/
  27
  28#include <linux/module.h>
  29#include <linux/pci.h>
  30
  31#include "../comedidev.h"
  32
  33/*
  34 * Register map
  35 */
  36#define PIO1616L_DI_REG         0x00
  37#define PIO1616L_DO_REG         0x02
  38
  39static int contec_do_insn_bits(struct comedi_device *dev,
  40                               struct comedi_subdevice *s,
  41                               struct comedi_insn *insn,
  42                               unsigned int *data)
  43{
  44        if (comedi_dio_update_state(s, data))
  45                outw(s->state, dev->iobase + PIO1616L_DO_REG);
  46
  47        data[1] = s->state;
  48
  49        return insn->n;
  50}
  51
  52static int contec_di_insn_bits(struct comedi_device *dev,
  53                               struct comedi_subdevice *s,
  54                               struct comedi_insn *insn, unsigned int *data)
  55{
  56        data[1] = inw(dev->iobase + PIO1616L_DI_REG);
  57
  58        return insn->n;
  59}
  60
  61static int contec_auto_attach(struct comedi_device *dev,
  62                                        unsigned long context_unused)
  63{
  64        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
  65        struct comedi_subdevice *s;
  66        int ret;
  67
  68        ret = comedi_pci_enable(dev);
  69        if (ret)
  70                return ret;
  71        dev->iobase = pci_resource_start(pcidev, 0);
  72
  73        ret = comedi_alloc_subdevices(dev, 2);
  74        if (ret)
  75                return ret;
  76
  77        s = &dev->subdevices[0];
  78        s->type         = COMEDI_SUBD_DI;
  79        s->subdev_flags = SDF_READABLE;
  80        s->n_chan       = 16;
  81        s->maxdata      = 1;
  82        s->range_table  = &range_digital;
  83        s->insn_bits    = contec_di_insn_bits;
  84
  85        s = &dev->subdevices[1];
  86        s->type         = COMEDI_SUBD_DO;
  87        s->subdev_flags = SDF_WRITABLE;
  88        s->n_chan       = 16;
  89        s->maxdata      = 1;
  90        s->range_table  = &range_digital;
  91        s->insn_bits    = contec_do_insn_bits;
  92
  93        return 0;
  94}
  95
  96static struct comedi_driver contec_pci_dio_driver = {
  97        .driver_name    = "contec_pci_dio",
  98        .module         = THIS_MODULE,
  99        .auto_attach    = contec_auto_attach,
 100        .detach         = comedi_pci_detach,
 101};
 102
 103static int contec_pci_dio_pci_probe(struct pci_dev *dev,
 104                                    const struct pci_device_id *id)
 105{
 106        return comedi_pci_auto_config(dev, &contec_pci_dio_driver,
 107                                      id->driver_data);
 108}
 109
 110static const struct pci_device_id contec_pci_dio_pci_table[] = {
 111        { PCI_DEVICE(PCI_VENDOR_ID_CONTEC, 0x8172) },
 112        { 0 }
 113};
 114MODULE_DEVICE_TABLE(pci, contec_pci_dio_pci_table);
 115
 116static struct pci_driver contec_pci_dio_pci_driver = {
 117        .name           = "contec_pci_dio",
 118        .id_table       = contec_pci_dio_pci_table,
 119        .probe          = contec_pci_dio_pci_probe,
 120        .remove         = comedi_pci_auto_unconfig,
 121};
 122module_comedi_pci_driver(contec_pci_dio_driver, contec_pci_dio_pci_driver);
 123
 124MODULE_AUTHOR("Comedi http://www.comedi.org");
 125MODULE_DESCRIPTION("Comedi low-level driver");
 126MODULE_LICENSE("GPL");
 127
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