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     You should have received a copy of the GNU General Public License
  21     along with this program; if not, write to the Free Software
  22     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 */
  25 /*
  26 Driver: amplc_pci263
  27 Description: Amplicon PCI263
  28 Author: Ian Abbott <abbotti@mev.co.uk>
  29 Devices: [Amplicon] PCI263 (amplc_pci263)
  30 Updated: Fri, 12 Apr 2013 15:19:36 +0100
  31 Status: works
  32
  33 Configuration options: not applicable, uses PCI auto config
  34
  35 The board appears as one subdevice, with 16 digital outputs, each
  36 connected to a reed-relay. Relay contacts are closed when output is 1.
  37 The state of the outputs can be read.
  38 */
  39
  40 #include <linux/pci.h>
  41
  42 #include "../comedidev.h"
  43
  44 #define PCI263_DRIVER_NAME      "amplc_pci263"
  45
  46 /* PCI263 PCI configuration register information */
  47 #define PCI_DEVICE_ID_AMPLICON_PCI263 0x000c
  48
  49 static int pci263_do_insn_bits(struct comedi_device *dev,
  50                                struct comedi_subdevice *s,
  51                                struct comedi_insn *insn, unsigned int *data)
  52 {
  53         /* The insn data is a mask in data[0] and the new data
  54          * in data[1], each channel cooresponding to a bit. */
  55         if (data[0]) {
  56                 s->state &= ~data[0];
  57                 s->state |= data[0] & data[1];
  58                 /* Write out the new digital output lines */
  59                 outb(s->state & 0xFF, dev->iobase);
  60                 outb(s->state >> 8, dev->iobase + 1);
  61         }
  62         return insn->n;
  63 }
  64
  65 static int pci263_auto_attach(struct comedi_device *dev,
  66                               unsigned long context_unused)
  67 {
  68         struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
  69         struct comedi_subdevice *s;
  70         int ret;
  71
  72         ret = comedi_pci_enable(dev);
  73         if (ret)
  74                 return ret;
  75
  76         dev->iobase = pci_resource_start(pci_dev, 2);
  77         ret = comedi_alloc_subdevices(dev, 1);
  78         if (ret)
  79                 return ret;
  80
  81         s = &dev->subdevices[0];
  82         /* digital output subdevice */
  83         s->type = COMEDI_SUBD_DO;
  84         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
  85         s->n_chan = 16;
  86         s->maxdata = 1;
  87         s->range_table = &range_digital;
  88         s->insn_bits = pci263_do_insn_bits;
  89         /* read initial relay state */
  90         s->state = inb(dev->iobase) | (inb(dev->iobase + 1) << 8);
  91
  92         dev_info(dev->class_dev, "%s (pci %s) attached\n", dev->board_name,
  93                  pci_name(pci_dev));
  94         return 0;
  95 }
  96
  97 static struct comedi_driver amplc_pci263_driver = {
  98         .driver_name    = PCI263_DRIVER_NAME,
  99         .module         = THIS_MODULE,
 100         .auto_attach    = pci263_auto_attach,
 101         .detach         = comedi_pci_disable,
 102 };
 103
 104 static DEFINE_PCI_DEVICE_TABLE(pci263_pci_table) = {
 105         { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI263) },
 106         {0}
 107 };
 108 MODULE_DEVICE_TABLE(pci, pci263_pci_table);
 109
 110 static int amplc_pci263_pci_probe(struct pci_dev *dev,
 111                                   const struct pci_device_id *id)
 112 {
 113         return comedi_pci_auto_config(dev, &amplc_pci263_driver,
 114                                       id->driver_data);
 115 }
 116
 117 static struct pci_driver amplc_pci263_pci_driver = {
 118         .name           = PCI263_DRIVER_NAME,
 119         .id_table       = pci263_pci_table,
 120         .probe          = &amplc_pci263_pci_probe,
 121         .remove         = comedi_pci_auto_unconfig,
 122 };
 123 module_comedi_pci_driver(amplc_pci263_driver, amplc_pci263_pci_driver);
 124
 125 MODULE_AUTHOR("Comedi http://www.comedi.org");
 126 MODULE_DESCRIPTION("Comedi driver for Amplicon PCI263 relay board");
 127 MODULE_LICENSE("GPL");