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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 #define PCI263_DRIVER_NAME      "amplc_pci263"
 41 
 42 /* PCI263 PCI configuration register information */
 43 #define PCI_DEVICE_ID_AMPLICON_PCI263 0x000c
 44 
 45 static int pci263_do_insn_bits(struct comedi_device *dev,
 46                                struct comedi_subdevice *s,
 47                                struct comedi_insn *insn,
 48                                unsigned int *data)
 49 {
 50         if (comedi_dio_update_state(s, data)) {
 51                 outb(s->state & 0xff, dev->iobase);
 52                 outb((s->state >> 8) & 0xff, dev->iobase + 1);
 53         }
 54 
 55         data[1] = s->state;
 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         return 0;
 88 }
 89 
 90 static struct comedi_driver amplc_pci263_driver = {
 91         .driver_name    = PCI263_DRIVER_NAME,
 92         .module         = THIS_MODULE,
 93         .auto_attach    = pci263_auto_attach,
 94         .detach         = comedi_pci_disable,
 95 };
 96 
 97 static const struct pci_device_id pci263_pci_table[] = {
 98         { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI263) },
 99         {0}
100 };
101 MODULE_DEVICE_TABLE(pci, pci263_pci_table);
102 
103 static int amplc_pci263_pci_probe(struct pci_dev *dev,
104                                   const struct pci_device_id *id)
105 {
106         return comedi_pci_auto_config(dev, &amplc_pci263_driver,
107                                       id->driver_data);
108 }
109 
110 static struct pci_driver amplc_pci263_pci_driver = {
111         .name           = PCI263_DRIVER_NAME,
112         .id_table       = pci263_pci_table,
113         .probe          = &amplc_pci263_pci_probe,
114         .remove         = comedi_pci_auto_unconfig,
115 };
116 module_comedi_pci_driver(amplc_pci263_driver, amplc_pci263_pci_driver);
117 
118 MODULE_AUTHOR("Comedi http://www.comedi.org");
119 MODULE_DESCRIPTION("Comedi driver for Amplicon PCI263 relay board");
120 MODULE_LICENSE("GPL");
121 

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