text: /*
  
      comedi/drivers/aio_iiro_16.c
  
      Driver for Access I/O Products PC-104 AIO-IIRO-16 Digital I/O board
      Copyright (C) 2006 C&C Technologies, Inc.
  
      This program is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation; either version 2 of the License, or
      (at your option) any later version.
  
      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.
  */
  
  /*
  
  Driver: aio_iiro_16
  Description: Access I/O Products PC-104 IIRO16 Relay And Isolated Input Board
  Author: Zachary Ware <zach.ware@cctechnol.com>
  Devices:
   [Access I/O] PC-104 AIO12-8
  Status: experimental
  
  Configuration Options:
    [0] - I/O port base address
  
  */
  
  #include <linux/module.h>
  #include "../comedidev.h"
  
  #define AIO_IIRO_16_SIZE	0x08
  #define AIO_IIRO_16_RELAY_0_7	0x00
  #define AIO_IIRO_16_INPUT_0_7	0x01
  #define AIO_IIRO_16_IRQ		0x02
  #define AIO_IIRO_16_RELAY_8_15	0x04
  #define AIO_IIRO_16_INPUT_8_15	0x05
  
  static int aio_iiro_16_dio_insn_bits_write(struct comedi_device *dev,
  					   struct comedi_subdevice *s,
  					   struct comedi_insn *insn,
  					   unsigned int *data)
  {
  	if (comedi_dio_update_state(s, data)) {
  		outb(s->state & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7);
  		outb((s->state >> 8) & 0xff,
  		     dev->iobase + AIO_IIRO_16_RELAY_8_15);
  	}
  
  	data[1] = s->state;
  
  	return insn->n;
  }
  
  static int aio_iiro_16_dio_insn_bits_read(struct comedi_device *dev,
  					  struct comedi_subdevice *s,
  					  struct comedi_insn *insn,
  					  unsigned int *data)
  {
  	data[1] = 0;
  	data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_0_7);
  	data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8;
  
  	return insn->n;
  }
  
  static int aio_iiro_16_attach(struct comedi_device *dev,
  			      struct comedi_devconfig *it)
  {
  	struct comedi_subdevice *s;
  	int ret;
  
  	ret = comedi_request_region(dev, it->options[0], AIO_IIRO_16_SIZE);
  	if (ret)
  		return ret;
  
  	ret = comedi_alloc_subdevices(dev, 2);
  	if (ret)
  		return ret;
  
  	s = &dev->subdevices[0];
  	s->type = COMEDI_SUBD_DIO;
  	s->subdev_flags = SDF_WRITABLE;
  	s->n_chan = 16;
  	s->maxdata = 1;
  	s->range_table = &range_digital;
  	s->insn_bits = aio_iiro_16_dio_insn_bits_write;
  
  	s = &dev->subdevices[1];
  	s->type = COMEDI_SUBD_DIO;
  	s->subdev_flags = SDF_READABLE;
  	s->n_chan = 16;
  	s->maxdata = 1;
  	s->range_table = &range_digital;
  	s->insn_bits = aio_iiro_16_dio_insn_bits_read;
  
  	return 0;
  }
  
  static struct comedi_driver aio_iiro_16_driver = {
  	.driver_name	= "aio_iiro_16",
  	.module		= THIS_MODULE,
  	.attach		= aio_iiro_16_attach,
  	.detach		= comedi_legacy_detach,
  };
  module_comedi_driver(aio_iiro_16_driver);
  
  MODULE_AUTHOR("Comedi http://www.comedi.org");
  MODULE_DESCRIPTION("Comedi low-level driver");
  MODULE_LICENSE("GPL");
  