drivers/staging/comedi/drivers/contec_pci_dio.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * comedi/drivers/contec_pci_dio.c
   4  *
   5  * COMEDI - Linux Control and Measurement Device Interface
   6  * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   7  */
   8
   9 /*
  10  * Driver: contec_pci_dio
  11  * Description: Contec PIO1616L digital I/O board
  12  * Devices: [Contec] PIO1616L (contec_pci_dio)
  13  * Author: Stefano Rivoir <s.rivoir@gts.it>
  14  * Updated: Wed, 27 Jun 2007 13:00:06 +0100
  15  * Status: works
  16  *
  17  * Configuration Options: not applicable, uses comedi PCI auto config
  18  */
  19
  20 #include <linux/module.h>
  21
  22 #include "../comedi_pci.h"
  23
  24 /*
  25  * Register map
  26  */
  27 #define PIO1616L_DI_REG         0x00
  28 #define PIO1616L_DO_REG         0x02
  29
  30 static int contec_do_insn_bits(struct comedi_device *dev,
  31                                struct comedi_subdevice *s,
  32                                struct comedi_insn *insn,
  33                                unsigned int *data)
  34 {
  35         if (comedi_dio_update_state(s, data))
  36                 outw(s->state, dev->iobase + PIO1616L_DO_REG);
  37
  38         data[1] = s->state;
  39
  40         return insn->n;
  41 }
  42
  43 static int contec_di_insn_bits(struct comedi_device *dev,
  44                                struct comedi_subdevice *s,
  45                                struct comedi_insn *insn, unsigned int *data)
  46 {
  47         data[1] = inw(dev->iobase + PIO1616L_DI_REG);
  48
  49         return insn->n;
  50 }
  51
  52 static int contec_auto_attach(struct comedi_device *dev,
  53                               unsigned long context_unused)
  54 {
  55         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
  56         struct comedi_subdevice *s;
  57         int ret;
  58
  59         ret = comedi_pci_enable(dev);
  60         if (ret)
  61                 return ret;
  62         dev->iobase = pci_resource_start(pcidev, 0);
  63
  64         ret = comedi_alloc_subdevices(dev, 2);
  65         if (ret)
  66                 return ret;
  67
  68         s = &dev->subdevices[0];
  69         s->type         = COMEDI_SUBD_DI;
  70         s->subdev_flags = SDF_READABLE;
  71         s->n_chan       = 16;
  72         s->maxdata      = 1;
  73         s->range_table  = &range_digital;
  74         s->insn_bits    = contec_di_insn_bits;
  75
  76         s = &dev->subdevices[1];
  77         s->type         = COMEDI_SUBD_DO;
  78         s->subdev_flags = SDF_WRITABLE;
  79         s->n_chan       = 16;
  80         s->maxdata      = 1;
  81         s->range_table  = &range_digital;
  82         s->insn_bits    = contec_do_insn_bits;
  83
  84         return 0;
  85 }
  86
  87 static struct comedi_driver contec_pci_dio_driver = {
  88         .driver_name    = "contec_pci_dio",
  89         .module         = THIS_MODULE,
  90         .auto_attach    = contec_auto_attach,
  91         .detach         = comedi_pci_detach,
  92 };
  93
  94 static int contec_pci_dio_pci_probe(struct pci_dev *dev,
  95                                     const struct pci_device_id *id)
  96 {
  97         return comedi_pci_auto_config(dev, &contec_pci_dio_driver,
  98                                       id->driver_data);
  99 }
 100
 101 static const struct pci_device_id contec_pci_dio_pci_table[] = {
 102         { PCI_DEVICE(PCI_VENDOR_ID_CONTEC, 0x8172) },
 103         { 0 }
 104 };
 105 MODULE_DEVICE_TABLE(pci, contec_pci_dio_pci_table);
 106
 107 static struct pci_driver contec_pci_dio_pci_driver = {
 108         .name           = "contec_pci_dio",
 109         .id_table       = contec_pci_dio_pci_table,
 110         .probe          = contec_pci_dio_pci_probe,
 111         .remove         = comedi_pci_auto_unconfig,
 112 };
 113 module_comedi_pci_driver(contec_pci_dio_driver, contec_pci_dio_pci_driver);
 114
 115 MODULE_AUTHOR("Comedi https://www.comedi.org");
 116 MODULE_DESCRIPTION("Comedi low-level driver");
 117 MODULE_LICENSE("GPL");