drivers/staging/comedi/drivers/amplc_pci263.c

   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 /*
  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/pci.h>
  36
  37 #include "../comedidev.h"
  38
  39 #define PCI263_DRIVER_NAME      "amplc_pci263"
  40
  41 /* PCI263 PCI configuration register information */
  42 #define PCI_DEVICE_ID_AMPLICON_PCI263 0x000c
  43
  44 static int pci263_do_insn_bits(struct comedi_device *dev,
  45                                struct comedi_subdevice *s,
  46                                struct comedi_insn *insn, unsigned int *data)
  47 {
  48         /* The insn data is a mask in data[0] and the new data
  49          * in data[1], each channel cooresponding to a bit. */
  50         if (data[0]) {
  51                 s->state &= ~data[0];
  52                 s->state |= data[0] & data[1];
  53                 /* Write out the new digital output lines */
  54                 outb(s->state & 0xFF, dev->iobase);
  55                 outb(s->state >> 8, dev->iobase + 1);
  56         }
  57         return insn->n;
  58 }
  59
  60 static int pci263_auto_attach(struct comedi_device *dev,
  61                               unsigned long context_unused)
  62 {
  63         struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
  64         struct comedi_subdevice *s;
  65         int ret;
  66
  67         ret = comedi_pci_enable(dev);
  68         if (ret)
  69                 return ret;
  70
  71         dev->iobase = pci_resource_start(pci_dev, 2);
  72         ret = comedi_alloc_subdevices(dev, 1);
  73         if (ret)
  74                 return ret;
  75
  76         s = &dev->subdevices[0];
  77         /* digital output subdevice */
  78         s->type = COMEDI_SUBD_DO;
  79         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
  80         s->n_chan = 16;
  81         s->maxdata = 1;
  82         s->range_table = &range_digital;
  83         s->insn_bits = pci263_do_insn_bits;
  84         /* read initial relay state */
  85         s->state = inb(dev->iobase) | (inb(dev->iobase + 1) << 8);
  86
  87         dev_info(dev->class_dev, "%s (pci %s) attached\n", dev->board_name,
  88                  pci_name(pci_dev));
  89         return 0;
  90 }
  91
  92 static struct comedi_driver amplc_pci263_driver = {
  93         .driver_name    = PCI263_DRIVER_NAME,
  94         .module         = THIS_MODULE,
  95         .auto_attach    = pci263_auto_attach,
  96         .detach         = comedi_pci_disable,
  97 };
  98
  99 static DEFINE_PCI_DEVICE_TABLE(pci263_pci_table) = {
 100         { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI263) },
 101         {0}
 102 };
 103 MODULE_DEVICE_TABLE(pci, pci263_pci_table);
 104
 105 static int amplc_pci263_pci_probe(struct pci_dev *dev,
 106                                   const struct pci_device_id *id)
 107 {
 108         return comedi_pci_auto_config(dev, &amplc_pci263_driver,
 109                                       id->driver_data);
 110 }
 111
 112 static struct pci_driver amplc_pci263_pci_driver = {
 113         .name           = PCI263_DRIVER_NAME,
 114         .id_table       = pci263_pci_table,
 115         .probe          = &amplc_pci263_pci_probe,
 116         .remove         = comedi_pci_auto_unconfig,
 117 };
 118 module_comedi_pci_driver(amplc_pci263_driver, amplc_pci263_pci_driver);
 119
 120 MODULE_AUTHOR("Comedi http://www.comedi.org");
 121 MODULE_DESCRIPTION("Comedi driver for Amplicon PCI263 relay board");
 122 MODULE_LICENSE("GPL");