drivers/staging/comedi/drivers/aio_iiro_16.c

   1 /*
   2
   3     comedi/drivers/aio_iiro_16.c
   4
   5     Driver for Access I/O Products PC-104 AIO-IIRO-16 Digital I/O board
   6     Copyright (C) 2006 C&C Technologies, Inc.
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 /*
  24
  25 Driver: aio_iiro_16
  26 Description: Access I/O Products PC-104 IIRO16 Relay And Isolated Input Board
  27 Author: Zachary Ware <zach.ware@cctechnol.com>
  28 Devices:
  29  [Access I/O] PC-104 AIO12-8
  30 Status: experimental
  31
  32 Configuration Options:
  33   [0] - I/O port base address
  34
  35 */
  36
  37 #include "../comedidev.h"
  38 #include <linux/ioport.h>
  39
  40 #define AIO_IIRO_16_SIZE        0x08
  41 #define AIO_IIRO_16_RELAY_0_7   0x00
  42 #define AIO_IIRO_16_INPUT_0_7   0x01
  43 #define AIO_IIRO_16_IRQ         0x02
  44 #define AIO_IIRO_16_RELAY_8_15  0x04
  45 #define AIO_IIRO_16_INPUT_8_15  0x05
  46
  47 struct aio_iiro_16_board {
  48         const char *name;
  49         int do_;
  50         int di;
  51 };
  52
  53 static const struct aio_iiro_16_board aio_iiro_16_boards[] = {
  54         {
  55          .name = "aio_iiro_16",
  56          .di = 16,
  57          .do_ = 16},
  58 };
  59
  60 struct aio_iiro_16_private {
  61         int data;
  62         struct pci_dev *pci_dev;
  63         unsigned int ao_readback[2];
  64 };
  65
  66 #define devpriv ((struct aio_iiro_16_private *) dev->private)
  67
  68 static int aio_iiro_16_dio_insn_bits_write(struct comedi_device *dev,
  69                                            struct comedi_subdevice *s,
  70                                            struct comedi_insn *insn,
  71                                            unsigned int *data)
  72 {
  73         if (insn->n != 2)
  74                 return -EINVAL;
  75
  76         if (data[0]) {
  77                 s->state &= ~data[0];
  78                 s->state |= data[0] & data[1];
  79                 outb(s->state & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7);
  80                 outb((s->state >> 8) & 0xff,
  81                      dev->iobase + AIO_IIRO_16_RELAY_8_15);
  82         }
  83
  84         data[1] = s->state;
  85
  86         return 2;
  87 }
  88
  89 static int aio_iiro_16_dio_insn_bits_read(struct comedi_device *dev,
  90                                           struct comedi_subdevice *s,
  91                                           struct comedi_insn *insn,
  92                                           unsigned int *data)
  93 {
  94         if (insn->n != 2)
  95                 return -EINVAL;
  96
  97         data[1] = 0;
  98         data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_0_7);
  99         data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8;
 100
 101         return 2;
 102 }
 103
 104 static int aio_iiro_16_attach(struct comedi_device *dev,
 105                               struct comedi_devconfig *it)
 106 {
 107         const struct aio_iiro_16_board *board = comedi_board(dev);
 108         int iobase;
 109         struct comedi_subdevice *s;
 110         int ret;
 111
 112         printk(KERN_INFO "comedi%d: aio_iiro_16: ", dev->minor);
 113
 114         dev->board_name = board->name;
 115
 116         iobase = it->options[0];
 117
 118         if (!request_region(iobase, AIO_IIRO_16_SIZE, dev->board_name)) {
 119                 printk("I/O port conflict");
 120                 return -EIO;
 121         }
 122
 123         dev->iobase = iobase;
 124
 125         if (alloc_private(dev, sizeof(struct aio_iiro_16_private)) < 0)
 126                 return -ENOMEM;
 127
 128         ret = comedi_alloc_subdevices(dev, 2);
 129         if (ret)
 130                 return ret;
 131
 132         s = dev->subdevices + 0;
 133         s->type = COMEDI_SUBD_DIO;
 134         s->subdev_flags = SDF_WRITABLE;
 135         s->n_chan = 16;
 136         s->maxdata = 1;
 137         s->range_table = &range_digital;
 138         s->insn_bits = aio_iiro_16_dio_insn_bits_write;
 139
 140         s = dev->subdevices + 1;
 141         s->type = COMEDI_SUBD_DIO;
 142         s->subdev_flags = SDF_READABLE;
 143         s->n_chan = 16;
 144         s->maxdata = 1;
 145         s->range_table = &range_digital;
 146         s->insn_bits = aio_iiro_16_dio_insn_bits_read;
 147
 148         printk("attached\n");
 149
 150         return 1;
 151 }
 152
 153 static void aio_iiro_16_detach(struct comedi_device *dev)
 154 {
 155         if (dev->iobase)
 156                 release_region(dev->iobase, AIO_IIRO_16_SIZE);
 157 }
 158
 159 static struct comedi_driver aio_iiro_16_driver = {
 160         .driver_name    = "aio_iiro_16",
 161         .module         = THIS_MODULE,
 162         .attach         = aio_iiro_16_attach,
 163         .detach         = aio_iiro_16_detach,
 164         .board_name     = &aio_iiro_16_boards[0].name,
 165         .offset         = sizeof(struct aio_iiro_16_board),
 166         .num_names      = ARRAY_SIZE(aio_iiro_16_boards),
 167 };
 168 module_comedi_driver(aio_iiro_16_driver);
 169
 170 MODULE_AUTHOR("Comedi http://www.comedi.org");
 171 MODULE_DESCRIPTION("Comedi low-level driver");
 172 MODULE_LICENSE("GPL");