LXR linux/drivers/staging/comedi/drivers/amplc

   1/*
   2    comedi/drivers/amplc_pci263.c
   3    Driver for Amplicon PCI263 relay board.
   4
   5    Copyright (C) 2002 MEV Ltd. <http://www.mev.co.uk/>
   6
   7    COMEDI - Linux Control and Measurement Device Interface
   8    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19*/
  20/*
  21Driver: amplc_pci263
  22Description: Amplicon PCI263
  23Author: Ian Abbott <abbotti@mev.co.uk>
  24Devices: [Amplicon] PCI263 (amplc_pci263)
  25Updated: Fri, 12 Apr 2013 15:19:36 +0100
  26Status: works
  27
  28Configuration options: not applicable, uses PCI auto config
  29
  30The board appears as one subdevice, with 16 digital outputs, each
  31connected to a reed-relay. Relay contacts are closed when output is 1.
  32The state of the outputs can be read.
  33*/
  34
  35#include <linux/module.h>
  36#include <linux/pci.h>
  37
  38#include "../comedidev.h"
  39
  40#define PCI263_DRIVER_NAME      "amplc_pci263"
  41
  42/* PCI263 PCI configuration register information */
  43#define PCI_DEVICE_ID_AMPLICON_PCI263 0x000c
  44
  45static int pci263_do_insn_bits(struct comedi_device *dev,
  46                               struct comedi_subdevice *s,
  47                               struct comedi_insn *insn, unsigned int *data)
  48{
  49        /* The insn data is a mask in data[0] and the new data
  50         * in data[1], each channel cooresponding to a bit. */
  51        if (data[0]) {
  52                s->state &= ~data[0];
  53                s->state |= data[0] & data[1];
  54                /* Write out the new digital output lines */
  55                outb(s->state & 0xFF, dev->iobase);
  56                outb(s->state >> 8, dev->iobase + 1);
  57        }
  58        return insn->n;
  59}
  60
  61static int pci263_auto_attach(struct comedi_device *dev,
  62                              unsigned long context_unused)
  63{
  64        struct pci_dev *pci_dev = 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
  72        dev->iobase = pci_resource_start(pci_dev, 2);
  73        ret = comedi_alloc_subdevices(dev, 1);
  74        if (ret)
  75                return ret;
  76
  77        s = &dev->subdevices[0];
  78        /* digital output subdevice */
  79        s->type = COMEDI_SUBD_DO;
  80        s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
  81        s->n_chan = 16;
  82        s->maxdata = 1;
  83        s->range_table = &range_digital;
  84        s->insn_bits = pci263_do_insn_bits;
  85        /* read initial relay state */
  86        s->state = inb(dev->iobase) | (inb(dev->iobase + 1) << 8);
  87
  88        dev_info(dev->class_dev, "%s (pci %s) attached\n", dev->board_name,
  89                 pci_name(pci_dev));
  90        return 0;
  91}
  92
  93static struct comedi_driver amplc_pci263_driver = {
  94        .driver_name    = PCI263_DRIVER_NAME,
  95        .module         = THIS_MODULE,
  96        .auto_attach    = pci263_auto_attach,
  97        .detach         = comedi_pci_disable,
  98};
  99
 100static DEFINE_PCI_DEVICE_TABLE(pci263_pci_table) = {
 101        { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI263) },
 102        {0}
 103};
 104MODULE_DEVICE_TABLE(pci, pci263_pci_table);
 105
 106static int amplc_pci263_pci_probe(struct pci_dev *dev,
 107                                  const struct pci_device_id *id)
 108{
 109        return comedi_pci_auto_config(dev, &amplc_pci263_driver,
 110                                      id->driver_data);
 111}
 112
 113static struct pci_driver amplc_pci263_pci_driver = {
 114        .name           = PCI263_DRIVER_NAME,
 115        .id_table       = pci263_pci_table,
 116        .probe          = &amplc_pci263_pci_probe,
 117        .remove         = comedi_pci_auto_unconfig,
 118};
 119module_comedi_pci_driver(amplc_pci263_driver, amplc_pci263_pci_driver);
 120
 121MODULE_AUTHOR("Comedi http://www.comedi.org");
 122MODULE_DESCRIPTION("Comedi driver for Amplicon PCI263 relay board");
 123MODULE_LICENSE("GPL");
 124