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

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