drivers/staging/comedi/drivers/contec_pci_dio.c

   1 /*
   2     comedi/drivers/contec_pci_dio.c
   3
   4     COMEDI - Linux Control and Measurement Device Interface
   5     Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program; if not, write to the Free Software
  19     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21 */
  22 /*
  23 Driver: contec_pci_dio
  24 Description: Contec PIO1616L digital I/O board
  25 Devices: [Contec] PIO1616L (contec_pci_dio)
  26 Author: Stefano Rivoir <s.rivoir@gts.it>
  27 Updated: Wed, 27 Jun 2007 13:00:06 +0100
  28 Status: works
  29
  30 Configuration Options: not applicable, uses comedi PCI auto config
  31 */
  32
  33 #include <linux/pci.h>
  34
  35 #include "../comedidev.h"
  36
  37 #define PCI_DEVICE_ID_PIO1616L 0x8172
  38
  39 /*
  40  * Register map
  41  */
  42 #define PIO1616L_DI_REG         0x00
  43 #define PIO1616L_DO_REG         0x02
  44
  45 static int contec_do_insn_bits(struct comedi_device *dev,
  46                                struct comedi_subdevice *s,
  47                                struct comedi_insn *insn, unsigned int *data)
  48 {
  49         unsigned int mask = data[0];
  50         unsigned int bits = data[1];
  51
  52         if (mask) {
  53                 s->state &= ~mask;
  54                 s->state |= (bits & mask);
  55
  56                 outw(s->state, dev->iobase + PIO1616L_DO_REG);
  57         }
  58
  59         data[1] = s->state;
  60
  61         return insn->n;
  62 }
  63
  64 static int contec_di_insn_bits(struct comedi_device *dev,
  65                                struct comedi_subdevice *s,
  66                                struct comedi_insn *insn, unsigned int *data)
  67 {
  68         data[1] = inw(dev->iobase + PIO1616L_DI_REG);
  69
  70         return insn->n;
  71 }
  72
  73 static int contec_auto_attach(struct comedi_device *dev,
  74                                         unsigned long context_unused)
  75 {
  76         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
  77         struct comedi_subdevice *s;
  78         int ret;
  79
  80         dev->board_name = dev->driver->driver_name;
  81
  82         ret = comedi_pci_enable(pcidev, dev->board_name);
  83         if (ret)
  84                 return ret;
  85         dev->iobase = pci_resource_start(pcidev, 0);
  86
  87         ret = comedi_alloc_subdevices(dev, 2);
  88         if (ret)
  89                 return ret;
  90
  91         s = &dev->subdevices[0];
  92         s->type         = COMEDI_SUBD_DI;
  93         s->subdev_flags = SDF_READABLE;
  94         s->n_chan       = 16;
  95         s->maxdata      = 1;
  96         s->range_table  = &range_digital;
  97         s->insn_bits    = contec_di_insn_bits;
  98
  99         s = &dev->subdevices[1];
 100         s->type         = COMEDI_SUBD_DO;
 101         s->subdev_flags = SDF_WRITABLE;
 102         s->n_chan       = 16;
 103         s->maxdata      = 1;
 104         s->range_table  = &range_digital;
 105         s->insn_bits    = contec_do_insn_bits;
 106
 107         dev_info(dev->class_dev, "%s attached\n", dev->board_name);
 108
 109         return 0;
 110 }
 111
 112 static void contec_detach(struct comedi_device *dev)
 113 {
 114         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 115
 116         if (pcidev) {
 117                 if (dev->iobase)
 118                         comedi_pci_disable(pcidev);
 119         }
 120 }
 121
 122 static struct comedi_driver contec_pci_dio_driver = {
 123         .driver_name    = "contec_pci_dio",
 124         .module         = THIS_MODULE,
 125         .auto_attach    = contec_auto_attach,
 126         .detach         = contec_detach,
 127 };
 128
 129 static int contec_pci_dio_pci_probe(struct pci_dev *dev,
 130                                               const struct pci_device_id *ent)
 131 {
 132         return comedi_pci_auto_config(dev, &contec_pci_dio_driver);
 133 }
 134
 135 static DEFINE_PCI_DEVICE_TABLE(contec_pci_dio_pci_table) = {
 136         { PCI_DEVICE(PCI_VENDOR_ID_CONTEC, PCI_DEVICE_ID_PIO1616L) },
 137         { 0 }
 138 };
 139 MODULE_DEVICE_TABLE(pci, contec_pci_dio_pci_table);
 140
 141 static struct pci_driver contec_pci_dio_pci_driver = {
 142         .name           = "contec_pci_dio",
 143         .id_table       = contec_pci_dio_pci_table,
 144         .probe          = contec_pci_dio_pci_probe,
 145         .remove         = comedi_pci_auto_unconfig,
 146 };
 147 module_comedi_pci_driver(contec_pci_dio_driver, contec_pci_dio_pci_driver);
 148
 149 MODULE_AUTHOR("Comedi http://www.comedi.org");
 150 MODULE_DESCRIPTION("Comedi low-level driver");
 151 MODULE_LICENSE("GPL");