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Linux/drivers/staging/comedi/drivers/amplc_pci263.c

  1 /*
  2  * Driver for Amplicon PCI263 relay board.
  3  *
  4  * Copyright (C) 2002 MEV Ltd. <http://www.mev.co.uk/>
  5  *
  6  * COMEDI - Linux Control and Measurement Device Interface
  7  * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
  8  *
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License as published by
 11  * the Free Software Foundation; either version 2 of the License, or
 12  * (at your option) any later version.
 13  *
 14  * This program is distributed in the hope that it will be useful,
 15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17  * GNU General Public License for more details.
 18  */
 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 
 37 #include "../comedi_pci.h"
 38 
 39 /* PCI263 registers */
 40 #define PCI263_DO_0_7_REG       0x00
 41 #define PCI263_DO_8_15_REG      0x01
 42 
 43 static int pci263_do_insn_bits(struct comedi_device *dev,
 44                                struct comedi_subdevice *s,
 45                                struct comedi_insn *insn,
 46                                unsigned int *data)
 47 {
 48         if (comedi_dio_update_state(s, data)) {
 49                 outb(s->state & 0xff, dev->iobase + PCI263_DO_0_7_REG);
 50                 outb((s->state >> 8) & 0xff, dev->iobase + PCI263_DO_8_15_REG);
 51         }
 52 
 53         data[1] = s->state;
 54 
 55         return insn->n;
 56 }
 57 
 58 static int pci263_auto_attach(struct comedi_device *dev,
 59                               unsigned long context_unused)
 60 {
 61         struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
 62         struct comedi_subdevice *s;
 63         int ret;
 64 
 65         ret = comedi_pci_enable(dev);
 66         if (ret)
 67                 return ret;
 68 
 69         dev->iobase = pci_resource_start(pci_dev, 2);
 70         ret = comedi_alloc_subdevices(dev, 1);
 71         if (ret)
 72                 return ret;
 73 
 74         /* Digital Output subdevice */
 75         s = &dev->subdevices[0];
 76         s->type         = COMEDI_SUBD_DO;
 77         s->subdev_flags = SDF_WRITABLE;
 78         s->n_chan       = 16;
 79         s->maxdata      = 1;
 80         s->range_table  = &range_digital;
 81         s->insn_bits    = pci263_do_insn_bits;
 82 
 83         /* read initial relay state */
 84         s->state = inb(dev->iobase + PCI263_DO_0_7_REG) |
 85                    (inb(dev->iobase + PCI263_DO_8_15_REG) << 8);
 86 
 87         return 0;
 88 }
 89 
 90 static struct comedi_driver amplc_pci263_driver = {
 91         .driver_name    = "amplc_pci263",
 92         .module         = THIS_MODULE,
 93         .auto_attach    = pci263_auto_attach,
 94         .detach         = comedi_pci_detach,
 95 };
 96 
 97 static const struct pci_device_id pci263_pci_table[] = {
 98         { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, 0x000c) },
 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           = "amplc_pci263",
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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