LXR linux/drivers/comedi/drivers/amplc

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Driver for Amplicon PCI263 relay board.
   4 *
   5 * Copyright (C) 2002 MEV Ltd. <https://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
  11/*
  12 * Driver: amplc_pci263
  13 * Description: Amplicon PCI263
  14 * Author: Ian Abbott <abbotti@mev.co.uk>
  15 * Devices: [Amplicon] PCI263 (amplc_pci263)
  16 * Updated: Fri, 12 Apr 2013 15:19:36 +0100
  17 * Status: works
  18 *
  19 * Configuration options: not applicable, uses PCI auto config
  20 *
  21 * The board appears as one subdevice, with 16 digital outputs, each
  22 * connected to a reed-relay. Relay contacts are closed when output is 1.
  23 * The state of the outputs can be read.
  24 */
  25
  26#include <linux/module.h>
  27
  28#include "../comedi_pci.h"
  29
  30/* PCI263 registers */
  31#define PCI263_DO_0_7_REG       0x00
  32#define PCI263_DO_8_15_REG      0x01
  33
  34static int pci263_do_insn_bits(struct comedi_device *dev,
  35                               struct comedi_subdevice *s,
  36                               struct comedi_insn *insn,
  37                               unsigned int *data)
  38{
  39        if (comedi_dio_update_state(s, data)) {
  40                outb(s->state & 0xff, dev->iobase + PCI263_DO_0_7_REG);
  41                outb((s->state >> 8) & 0xff, dev->iobase + PCI263_DO_8_15_REG);
  42        }
  43
  44        data[1] = s->state;
  45
  46        return insn->n;
  47}
  48
  49static int pci263_auto_attach(struct comedi_device *dev,
  50                              unsigned long context_unused)
  51{
  52        struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
  53        struct comedi_subdevice *s;
  54        int ret;
  55
  56        ret = comedi_pci_enable(dev);
  57        if (ret)
  58                return ret;
  59
  60        dev->iobase = pci_resource_start(pci_dev, 2);
  61        ret = comedi_alloc_subdevices(dev, 1);
  62        if (ret)
  63                return ret;
  64
  65        /* Digital Output subdevice */
  66        s = &dev->subdevices[0];
  67        s->type         = COMEDI_SUBD_DO;
  68        s->subdev_flags = SDF_WRITABLE;
  69        s->n_chan       = 16;
  70        s->maxdata      = 1;
  71        s->range_table  = &range_digital;
  72        s->insn_bits    = pci263_do_insn_bits;
  73
  74        /* read initial relay state */
  75        s->state = inb(dev->iobase + PCI263_DO_0_7_REG) |
  76                   (inb(dev->iobase + PCI263_DO_8_15_REG) << 8);
  77
  78        return 0;
  79}
  80
  81static struct comedi_driver amplc_pci263_driver = {
  82        .driver_name    = "amplc_pci263",
  83        .module         = THIS_MODULE,
  84        .auto_attach    = pci263_auto_attach,
  85        .detach         = comedi_pci_detach,
  86};
  87
  88static const struct pci_device_id pci263_pci_table[] = {
  89        { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, 0x000c) },
  90        {0}
  91};
  92MODULE_DEVICE_TABLE(pci, pci263_pci_table);
  93
  94static int amplc_pci263_pci_probe(struct pci_dev *dev,
  95                                  const struct pci_device_id *id)
  96{
  97        return comedi_pci_auto_config(dev, &amplc_pci263_driver,
  98                                      id->driver_data);
  99}
 100
 101static struct pci_driver amplc_pci263_pci_driver = {
 102        .name           = "amplc_pci263",
 103        .id_table       = pci263_pci_table,
 104        .probe          = &amplc_pci263_pci_probe,
 105        .remove         = comedi_pci_auto_unconfig,
 106};
 107module_comedi_pci_driver(amplc_pci263_driver, amplc_pci263_pci_driver);
 108
 109MODULE_AUTHOR("Comedi https://www.comedi.org");
 110MODULE_DESCRIPTION("Comedi driver for Amplicon PCI263 relay board");
 111MODULE_LICENSE("GPL");
 112