release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/comedi/drivers/aio_iiro_16.c

   1 /*
   2
   3     comedi/drivers/aio_iiro_16.c
   4
   5     Driver for Acces 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: Acces I/O Products PC-104 IIRO16 Relay And Isolated Input Board
  27 Author: Zachary Ware <zach.ware@cctechnol.com>
  28 Devices:
  29  [Acces 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 #define thisboard       ((const struct aio_iiro_16_board *) dev->board_ptr)
  61
  62 struct aio_iiro_16_private {
  63         int data;
  64         struct pci_dev *pci_dev;
  65         unsigned int ao_readback[2];
  66 };
  67
  68 #define devpriv ((struct aio_iiro_16_private *) dev->private)
  69
  70 static int aio_iiro_16_attach(struct comedi_device *dev,
  71                               struct comedi_devconfig *it);
  72
  73 static int aio_iiro_16_detach(struct comedi_device *dev);
  74
  75 static struct comedi_driver driver_aio_iiro_16 = {
  76         .driver_name = "aio_iiro_16",
  77         .module = THIS_MODULE,
  78         .attach = aio_iiro_16_attach,
  79         .detach = aio_iiro_16_detach,
  80         .board_name = &aio_iiro_16_boards[0].name,
  81         .offset = sizeof(struct aio_iiro_16_board),
  82         .num_names = ARRAY_SIZE(aio_iiro_16_boards),
  83 };
  84
  85 static int aio_iiro_16_dio_insn_bits_read(struct comedi_device *dev,
  86                                           struct comedi_subdevice *s,
  87                                           struct comedi_insn *insn,
  88                                           unsigned int *data);
  89
  90 static int aio_iiro_16_dio_insn_bits_write(struct comedi_device *dev,
  91                                            struct comedi_subdevice *s,
  92                                            struct comedi_insn *insn,
  93                                            unsigned int *data);
  94
  95 static int aio_iiro_16_attach(struct comedi_device *dev,
  96                               struct comedi_devconfig *it)
  97 {
  98         int iobase;
  99         struct comedi_subdevice *s;
 100
 101         printk(KERN_INFO "comedi%d: aio_iiro_16: ", dev->minor);
 102
 103         dev->board_name = thisboard->name;
 104
 105         iobase = it->options[0];
 106
 107         if (!request_region(iobase, AIO_IIRO_16_SIZE, dev->board_name)) {
 108                 printk("I/O port conflict");
 109                 return -EIO;
 110         }
 111
 112         dev->iobase = iobase;
 113
 114         if (alloc_private(dev, sizeof(struct aio_iiro_16_private)) < 0)
 115                 return -ENOMEM;
 116
 117         if (alloc_subdevices(dev, 2) < 0)
 118                 return -ENOMEM;
 119
 120         s = dev->subdevices + 0;
 121         s->type = COMEDI_SUBD_DIO;
 122         s->subdev_flags = SDF_WRITABLE;
 123         s->n_chan = 16;
 124         s->maxdata = 1;
 125         s->range_table = &range_digital;
 126         s->insn_bits = aio_iiro_16_dio_insn_bits_write;
 127
 128         s = dev->subdevices + 1;
 129         s->type = COMEDI_SUBD_DIO;
 130         s->subdev_flags = SDF_READABLE;
 131         s->n_chan = 16;
 132         s->maxdata = 1;
 133         s->range_table = &range_digital;
 134         s->insn_bits = aio_iiro_16_dio_insn_bits_read;
 135
 136         printk("attached\n");
 137
 138         return 1;
 139 }
 140
 141 static int aio_iiro_16_detach(struct comedi_device *dev)
 142 {
 143         printk(KERN_INFO "comedi%d: aio_iiro_16: remove\n", dev->minor);
 144
 145         if (dev->iobase)
 146                 release_region(dev->iobase, AIO_IIRO_16_SIZE);
 147
 148         return 0;
 149 }
 150
 151 static int aio_iiro_16_dio_insn_bits_write(struct comedi_device *dev,
 152                                            struct comedi_subdevice *s,
 153                                            struct comedi_insn *insn,
 154                                            unsigned int *data)
 155 {
 156         if (insn->n != 2)
 157                 return -EINVAL;
 158
 159         if (data[0]) {
 160                 s->state &= ~data[0];
 161                 s->state |= data[0] & data[1];
 162                 outb(s->state & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7);
 163                 outb((s->state >> 8) & 0xff,
 164                      dev->iobase + AIO_IIRO_16_RELAY_8_15);
 165         }
 166
 167         data[1] = s->state;
 168
 169         return 2;
 170 }
 171
 172 static int aio_iiro_16_dio_insn_bits_read(struct comedi_device *dev,
 173                                           struct comedi_subdevice *s,
 174                                           struct comedi_insn *insn,
 175                                           unsigned int *data)
 176 {
 177         if (insn->n != 2)
 178                 return -EINVAL;
 179
 180         data[1] = 0;
 181         data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_0_7);
 182         data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8;
 183
 184         return 2;
 185 }
 186
 187 static int __init driver_aio_iiro_16_init_module(void)
 188 {
 189         return comedi_driver_register(&driver_aio_iiro_16);
 190 }
 191
 192 static void __exit driver_aio_iiro_16_cleanup_module(void)
 193 {
 194         comedi_driver_unregister(&driver_aio_iiro_16);
 195 }
 196
 197 module_init(driver_aio_iiro_16_init_module);
 198 module_exit(driver_aio_iiro_16_cleanup_module);
 199
 200 MODULE_AUTHOR("Comedi http://www.comedi.org");
 201 MODULE_DESCRIPTION("Comedi low-level driver");
 202 MODULE_LICENSE("GPL");