root/drivers/staging/comedi/drivers/amplc_pci263.c

DEFINITIONS

1. pci263_do_insn_bits
2. pci263_auto_attach
3. amplc_pci263_pci_probe

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   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 
  11 /*
  12  * Driver: amplc_pci263
  13  * Description: Amplicon PCI263
  14  * Author: Ian Abbott <abbotti@mev.co.uk>
  15  * Devices: [Amplicon] PCI263 (amplc_pci263)
  16  * Updated: Fri, 12 Apr 2013 15:19:36 +0100
  17  * Status: works
  18  *
  19  * Configuration options: not applicable, uses PCI auto config
  20  *
  21  * The board appears as one subdevice, with 16 digital outputs, each
  22  * connected to a reed-relay. Relay contacts are closed when output is 1.
  23  * The state of the outputs can be read.
  24  */
  25 
  26 #include <linux/module.h>
  27 
  28 #include "../comedi_pci.h"
  29 
  30 /* PCI263 registers */
  31 #define PCI263_DO_0_7_REG       0x00
  32 #define PCI263_DO_8_15_REG      0x01
  33 
  34 static int pci263_do_insn_bits(struct comedi_device *dev,
  35                                struct comedi_subdevice *s,
  36                                struct comedi_insn *insn,
  37                                unsigned int *data)
  38 {
  39         if (comedi_dio_update_state(s, data)) {
  40                 outb(s->state & 0xff, dev->iobase + PCI263_DO_0_7_REG);
  41                 outb((s->state >> 8) & 0xff, dev->iobase + PCI263_DO_8_15_REG);
  42         }
  43 
  44         data[1] = s->state;
  45 
  46         return insn->n;
  47 }
  48 
  49 static int pci263_auto_attach(struct comedi_device *dev,
  50                               unsigned long context_unused)
  51 {
  52         struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
  53         struct comedi_subdevice *s;
  54         int ret;
  55 
  56         ret = comedi_pci_enable(dev);
  57         if (ret)
  58                 return ret;
  59 
  60         dev->iobase = pci_resource_start(pci_dev, 2);
  61         ret = comedi_alloc_subdevices(dev, 1);
  62         if (ret)
  63                 return ret;
  64 
  65         /* Digital Output subdevice */
  66         s = &dev->subdevices[0];
  67         s->type         = COMEDI_SUBD_DO;
  68         s->subdev_flags = SDF_WRITABLE;
  69         s->n_chan       = 16;
  70         s->maxdata      = 1;
  71         s->range_table  = &range_digital;
  72         s->insn_bits    = pci263_do_insn_bits;
  73 
  74         /* read initial relay state */
  75         s->state = inb(dev->iobase + PCI263_DO_0_7_REG) |
  76                    (inb(dev->iobase + PCI263_DO_8_15_REG) << 8);
  77 
  78         return 0;
  79 }
  80 
  81 static struct comedi_driver amplc_pci263_driver = {
  82         .driver_name    = "amplc_pci263",
  83         .module         = THIS_MODULE,
  84         .auto_attach    = pci263_auto_attach,
  85         .detach         = comedi_pci_detach,
  86 };
  87 
  88 static const struct pci_device_id pci263_pci_table[] = {
  89         { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, 0x000c) },
  90         {0}
  91 };
  92 MODULE_DEVICE_TABLE(pci, pci263_pci_table);
  93 
  94 static int amplc_pci263_pci_probe(struct pci_dev *dev,
  95                                   const struct pci_device_id *id)
  96 {
  97         return comedi_pci_auto_config(dev, &amplc_pci263_driver,
  98                                       id->driver_data);
  99 }
 100 
 101 static struct pci_driver amplc_pci263_pci_driver = {
 102         .name           = "amplc_pci263",
 103         .id_table       = pci263_pci_table,
 104         .probe          = &amplc_pci263_pci_probe,
 105         .remove         = comedi_pci_auto_unconfig,
 106 };
 107 module_comedi_pci_driver(amplc_pci263_driver, amplc_pci263_pci_driver);
 108 
 109 MODULE_AUTHOR("Comedi http://www.comedi.org");
 110 MODULE_DESCRIPTION("Comedi driver for Amplicon PCI263 relay board");
 111 MODULE_LICENSE("GPL");