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 /*
  18 Driver: contec_pci_dio
  19 Description: Contec PIO1616L digital I/O board
  20 Devices: [Contec] PIO1616L (contec_pci_dio)
  21 Author: Stefano Rivoir <s.rivoir@gts.it>
  22 Updated: Wed, 27 Jun 2007 13:00:06 +0100
  23 Status: works
  24
  25 Configuration Options: not applicable, uses comedi PCI auto config
  26 */
  27
  28 #include <linux/pci.h>
  29
  30 #include "../comedidev.h"
  31
  32 #define PCI_DEVICE_ID_PIO1616L 0x8172
  33
  34 /*
  35  * Register map
  36  */
  37 #define PIO1616L_DI_REG         0x00
  38 #define PIO1616L_DO_REG         0x02
  39
  40 static int contec_do_insn_bits(struct comedi_device *dev,
  41                                struct comedi_subdevice *s,
  42                                struct comedi_insn *insn, unsigned int *data)
  43 {
  44         unsigned int mask = data[0];
  45         unsigned int bits = data[1];
  46
  47         if (mask) {
  48                 s->state &= ~mask;
  49                 s->state |= (bits & mask);
  50
  51                 outw(s->state, dev->iobase + PIO1616L_DO_REG);
  52         }
  53
  54         data[1] = s->state;
  55
  56         return insn->n;
  57 }
  58
  59 static int contec_di_insn_bits(struct comedi_device *dev,
  60                                struct comedi_subdevice *s,
  61                                struct comedi_insn *insn, unsigned int *data)
  62 {
  63         data[1] = inw(dev->iobase + PIO1616L_DI_REG);
  64
  65         return insn->n;
  66 }
  67
  68 static int contec_auto_attach(struct comedi_device *dev,
  69                                         unsigned long context_unused)
  70 {
  71         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
  72         struct comedi_subdevice *s;
  73         int ret;
  74
  75         ret = comedi_pci_enable(dev);
  76         if (ret)
  77                 return ret;
  78         dev->iobase = pci_resource_start(pcidev, 0);
  79
  80         ret = comedi_alloc_subdevices(dev, 2);
  81         if (ret)
  82                 return ret;
  83
  84         s = &dev->subdevices[0];
  85         s->type         = COMEDI_SUBD_DI;
  86         s->subdev_flags = SDF_READABLE;
  87         s->n_chan       = 16;
  88         s->maxdata      = 1;
  89         s->range_table  = &range_digital;
  90         s->insn_bits    = contec_di_insn_bits;
  91
  92         s = &dev->subdevices[1];
  93         s->type         = COMEDI_SUBD_DO;
  94         s->subdev_flags = SDF_WRITABLE;
  95         s->n_chan       = 16;
  96         s->maxdata      = 1;
  97         s->range_table  = &range_digital;
  98         s->insn_bits    = contec_do_insn_bits;
  99
 100         dev_info(dev->class_dev, "%s attached\n", dev->board_name);
 101
 102         return 0;
 103 }
 104
 105 static struct comedi_driver contec_pci_dio_driver = {
 106         .driver_name    = "contec_pci_dio",
 107         .module         = THIS_MODULE,
 108         .auto_attach    = contec_auto_attach,
 109         .detach         = comedi_pci_disable,
 110 };
 111
 112 static int contec_pci_dio_pci_probe(struct pci_dev *dev,
 113                                     const struct pci_device_id *id)
 114 {
 115         return comedi_pci_auto_config(dev, &contec_pci_dio_driver,
 116                                       id->driver_data);
 117 }
 118
 119 static DEFINE_PCI_DEVICE_TABLE(contec_pci_dio_pci_table) = {
 120         { PCI_DEVICE(PCI_VENDOR_ID_CONTEC, PCI_DEVICE_ID_PIO1616L) },
 121         { 0 }
 122 };
 123 MODULE_DEVICE_TABLE(pci, contec_pci_dio_pci_table);
 124
 125 static struct pci_driver contec_pci_dio_pci_driver = {
 126         .name           = "contec_pci_dio",
 127         .id_table       = contec_pci_dio_pci_table,
 128         .probe          = contec_pci_dio_pci_probe,
 129         .remove         = comedi_pci_auto_unconfig,
 130 };
 131 module_comedi_pci_driver(contec_pci_dio_driver, contec_pci_dio_pci_driver);
 132
 133 MODULE_AUTHOR("Comedi http://www.comedi.org");
 134 MODULE_DESCRIPTION("Comedi low-level driver");
 135 MODULE_LICENSE("GPL");