text: /*
   * fl512.c
   * Anders Gnistrup <ex18@kalman.iau.dtu.dk>
   *
   * COMEDI - Linux Control and Measurement Device Interface
   * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   *
   * 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: fl512
   * Description: unknown
   * Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
   * Devices: [unknown] FL512 (fl512)
   * Status: unknown
   *
   * Digital I/O is not supported.
   *
   * Configuration options:
   *   [0] - I/O port base address
   */
  
  #include <linux/module.h>
  #include "../comedidev.h"
  
  #include <linux/delay.h>
  
  /*
   * Register I/O map
   */
  #define FL512_AI_LSB_REG		0x02
  #define FL512_AI_MSB_REG		0x03
  #define FL512_AI_MUX_REG		0x02
  #define FL512_AI_START_CONV_REG		0x03
  #define FL512_AO_DATA_REG(x)		(0x04 + ((x) * 2))
  #define FL512_AO_TRIG_REG(x)		(0x04 + ((x) * 2))
  
  static const struct comedi_lrange range_fl512 = {
  	4, {
  		BIP_RANGE(0.5),
  		BIP_RANGE(1),
  		BIP_RANGE(5),
  		BIP_RANGE(10),
  		UNI_RANGE(1),
  		UNI_RANGE(5),
  		UNI_RANGE(10)
  	}
  };
  
  static int fl512_ai_insn_read(struct comedi_device *dev,
  			      struct comedi_subdevice *s,
  			      struct comedi_insn *insn,
  			      unsigned int *data)
  {
  	unsigned int chan = CR_CHAN(insn->chanspec);
  	unsigned int val;
  	int i;
  
  	outb(chan, dev->iobase + FL512_AI_MUX_REG);
  
  	for (i = 0; i < insn->n; i++) {
  		outb(0, dev->iobase + FL512_AI_START_CONV_REG);
  
  		/* XXX should test "done" flag instead of delay */
  		usleep_range(30, 100);
  
  		val = inb(dev->iobase + FL512_AI_LSB_REG);
  		val |= (inb(dev->iobase + FL512_AI_MSB_REG) << 8);
  		val &= s->maxdata;
  
  		data[i] = val;
  	}
  
  	return insn->n;
  }
  
  static int fl512_ao_insn_write(struct comedi_device *dev,
  			       struct comedi_subdevice *s,
  			       struct comedi_insn *insn,
  			       unsigned int *data)
  {
  	unsigned int chan = CR_CHAN(insn->chanspec);
  	unsigned int val = s->readback[chan];
  	int i;
  
  	for (i = 0; i < insn->n; i++) {
  		val = data[i];
  
  		/* write LSB, MSB then trigger conversion */
  		outb(val & 0x0ff, dev->iobase + FL512_AO_DATA_REG(chan));
  		outb((val >> 8) & 0xf, dev->iobase + FL512_AO_DATA_REG(chan));
  		inb(dev->iobase + FL512_AO_TRIG_REG(chan));
  	}
  	s->readback[chan] = val;
  
  	return insn->n;
  }
  
  static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it)
  {
  	struct comedi_subdevice *s;
  	int ret;
  
  	ret = comedi_request_region(dev, it->options[0], 0x10);
  	if (ret)
  		return ret;
  
  	ret = comedi_alloc_subdevices(dev, 2);
  	if (ret)
  		return ret;
  
  	/* Analog Input subdevice */
  	s = &dev->subdevices[0];
  	s->type		= COMEDI_SUBD_AI;
  	s->subdev_flags	= SDF_READABLE | SDF_GROUND;
  	s->n_chan	= 16;
  	s->maxdata	= 0x0fff;
  	s->range_table	= &range_fl512;
  	s->insn_read	= fl512_ai_insn_read;
  
  	/* Analog Output subdevice */
  	s = &dev->subdevices[1];
  	s->type		= COMEDI_SUBD_AO;
  	s->subdev_flags	= SDF_WRITABLE;
  	s->n_chan	= 2;
  	s->maxdata	= 0x0fff;
  	s->range_table	= &range_fl512;
  	s->insn_write	= fl512_ao_insn_write;
  
  	return comedi_alloc_subdev_readback(s);
  }
  
  static struct comedi_driver fl512_driver = {
  	.driver_name	= "fl512",
  	.module		= THIS_MODULE,
  	.attach		= fl512_attach,
  	.detach		= comedi_legacy_detach,
  };
  module_comedi_driver(fl512_driver);
  
  MODULE_AUTHOR("Comedi http://www.comedi.org");
  MODULE_DESCRIPTION("Comedi low-level driver");
  MODULE_LICENSE("GPL");
  