linux/drivers/staging/comedi/drivers/amplc_pci263.c
<<
>>
Prefs
   1/*
   2 * Driver for Amplicon PCI263 relay board.
   3 *
   4 * Copyright (C) 2002 MEV Ltd. <http://www.mev.co.uk/>
   5 *
   6 * COMEDI - Linux Control and Measurement Device Interface
   7 * Copyright (C) 2000 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
  20/*
  21 * Driver: amplc_pci263
  22 * Description: Amplicon PCI263
  23 * Author: Ian Abbott <abbotti@mev.co.uk>
  24 * Devices: [Amplicon] PCI263 (amplc_pci263)
  25 * Updated: Fri, 12 Apr 2013 15:19:36 +0100
  26 * Status: works
  27 *
  28 * Configuration options: not applicable, uses PCI auto config
  29 *
  30 * The board appears as one subdevice, with 16 digital outputs, each
  31 * connected to a reed-relay. Relay contacts are closed when output is 1.
  32 * The state of the outputs can be read.
  33 */
  34
  35#include <linux/module.h>
  36
  37#include "../comedi_pci.h"
  38
  39/* PCI263 registers */
  40#define PCI263_DO_0_7_REG       0x00
  41#define PCI263_DO_8_15_REG      0x01
  42
  43static int pci263_do_insn_bits(struct comedi_device *dev,
  44                               struct comedi_subdevice *s,
  45                               struct comedi_insn *insn,
  46                               unsigned int *data)
  47{
  48        if (comedi_dio_update_state(s, data)) {
  49                outb(s->state & 0xff, dev->iobase + PCI263_DO_0_7_REG);
  50                outb((s->state >> 8) & 0xff, dev->iobase + PCI263_DO_8_15_REG);
  51        }
  52
  53        data[1] = s->state;
  54
  55        return insn->n;
  56}
  57
  58static int pci263_auto_attach(struct comedi_device *dev,
  59                              unsigned long context_unused)
  60{
  61        struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
  62        struct comedi_subdevice *s;
  63        int ret;
  64
  65        ret = comedi_pci_enable(dev);
  66        if (ret)
  67                return ret;
  68
  69        dev->iobase = pci_resource_start(pci_dev, 2);
  70        ret = comedi_alloc_subdevices(dev, 1);
  71        if (ret)
  72                return ret;
  73
  74        /* Digital Output subdevice */
  75        s = &dev->subdevices[0];
  76        s->type         = COMEDI_SUBD_DO;
  77        s->subdev_flags = SDF_WRITABLE;
  78        s->n_chan       = 16;
  79        s->maxdata      = 1;
  80        s->range_table  = &range_digital;
  81        s->insn_bits    = pci263_do_insn_bits;
  82
  83        /* read initial relay state */
  84        s->state = inb(dev->iobase + PCI263_DO_0_7_REG) |
  85                   (inb(dev->iobase + PCI263_DO_8_15_REG) << 8);
  86
  87        return 0;
  88}
  89
  90static struct comedi_driver amplc_pci263_driver = {
  91        .driver_name    = "amplc_pci263",
  92        .module         = THIS_MODULE,
  93        .auto_attach    = pci263_auto_attach,
  94        .detach         = comedi_pci_detach,
  95};
  96
  97static const struct pci_device_id pci263_pci_table[] = {
  98        { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, 0x000c) },
  99        {0}
 100};
 101MODULE_DEVICE_TABLE(pci, pci263_pci_table);
 102
 103static int amplc_pci263_pci_probe(struct pci_dev *dev,
 104                                  const struct pci_device_id *id)
 105{
 106        return comedi_pci_auto_config(dev, &amplc_pci263_driver,
 107                                      id->driver_data);
 108}
 109
 110static struct pci_driver amplc_pci263_pci_driver = {
 111        .name           = "amplc_pci263",
 112        .id_table       = pci263_pci_table,
 113        .probe          = &amplc_pci263_pci_probe,
 114        .remove         = comedi_pci_auto_unconfig,
 115};
 116module_comedi_pci_driver(amplc_pci263_driver, amplc_pci263_pci_driver);
 117
 118MODULE_AUTHOR("Comedi http://www.comedi.org");
 119MODULE_DESCRIPTION("Comedi driver for Amplicon PCI263 relay board");
 120MODULE_LICENSE("GPL");
 121
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.