drivers/staging/comedi/drivers/fl512.c

   1 /*
   2  * fl512.c
   3  * Anders Gnistrup <ex18@kalman.iau.dtu.dk>
   4  *
   5  * COMEDI - Linux Control and Measurement Device Interface
   6  * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   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
  19 /*
  20  * Driver: fl512
  21  * Description: unknown
  22  * Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
  23  * Devices: [unknown] FL512 (fl512)
  24  * Status: unknown
  25  *
  26  * Digital I/O is not supported.
  27  *
  28  * Configuration options:
  29  *   [0] - I/O port base address
  30  */
  31
  32 #include <linux/module.h>
  33 #include "../comedidev.h"
  34
  35 #include <linux/delay.h>
  36
  37 /*
  38  * Register I/O map
  39  */
  40 #define FL512_AI_LSB_REG                0x02
  41 #define FL512_AI_MSB_REG                0x03
  42 #define FL512_AI_MUX_REG                0x02
  43 #define FL512_AI_START_CONV_REG         0x03
  44 #define FL512_AO_DATA_REG(x)            (0x04 + ((x) * 2))
  45 #define FL512_AO_TRIG_REG(x)            (0x04 + ((x) * 2))
  46
  47 static const struct comedi_lrange range_fl512 = {
  48         4, {
  49                 BIP_RANGE(0.5),
  50                 BIP_RANGE(1),
  51                 BIP_RANGE(5),
  52                 BIP_RANGE(10),
  53                 UNI_RANGE(1),
  54                 UNI_RANGE(5),
  55                 UNI_RANGE(10)
  56         }
  57 };
  58
  59 static int fl512_ai_insn_read(struct comedi_device *dev,
  60                               struct comedi_subdevice *s,
  61                               struct comedi_insn *insn,
  62                               unsigned int *data)
  63 {
  64         unsigned int chan = CR_CHAN(insn->chanspec);
  65         unsigned int val;
  66         int i;
  67
  68         outb(chan, dev->iobase + FL512_AI_MUX_REG);
  69
  70         for (i = 0; i < insn->n; i++) {
  71                 outb(0, dev->iobase + FL512_AI_START_CONV_REG);
  72
  73                 /* XXX should test "done" flag instead of delay */
  74                 usleep_range(30, 100);
  75
  76                 val = inb(dev->iobase + FL512_AI_LSB_REG);
  77                 val |= (inb(dev->iobase + FL512_AI_MSB_REG) << 8);
  78                 val &= s->maxdata;
  79
  80                 data[i] = val;
  81         }
  82
  83         return insn->n;
  84 }
  85
  86 static int fl512_ao_insn_write(struct comedi_device *dev,
  87                                struct comedi_subdevice *s,
  88                                struct comedi_insn *insn,
  89                                unsigned int *data)
  90 {
  91         unsigned int chan = CR_CHAN(insn->chanspec);
  92         unsigned int val = s->readback[chan];
  93         int i;
  94
  95         for (i = 0; i < insn->n; i++) {
  96                 val = data[i];
  97
  98                 /* write LSB, MSB then trigger conversion */
  99                 outb(val & 0x0ff, dev->iobase + FL512_AO_DATA_REG(chan));
 100                 outb((val >> 8) & 0xf, dev->iobase + FL512_AO_DATA_REG(chan));
 101                 inb(dev->iobase + FL512_AO_TRIG_REG(chan));
 102         }
 103         s->readback[chan] = val;
 104
 105         return insn->n;
 106 }
 107
 108 static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 109 {
 110         struct comedi_subdevice *s;
 111         int ret;
 112
 113         ret = comedi_request_region(dev, it->options[0], 0x10);
 114         if (ret)
 115                 return ret;
 116
 117         ret = comedi_alloc_subdevices(dev, 2);
 118         if (ret)
 119                 return ret;
 120
 121         /* Analog Input subdevice */
 122         s = &dev->subdevices[0];
 123         s->type         = COMEDI_SUBD_AI;
 124         s->subdev_flags = SDF_READABLE | SDF_GROUND;
 125         s->n_chan       = 16;
 126         s->maxdata      = 0x0fff;
 127         s->range_table  = &range_fl512;
 128         s->insn_read    = fl512_ai_insn_read;
 129
 130         /* Analog Output subdevice */
 131         s = &dev->subdevices[1];
 132         s->type         = COMEDI_SUBD_AO;
 133         s->subdev_flags = SDF_WRITABLE;
 134         s->n_chan       = 2;
 135         s->maxdata      = 0x0fff;
 136         s->range_table  = &range_fl512;
 137         s->insn_write   = fl512_ao_insn_write;
 138
 139         return comedi_alloc_subdev_readback(s);
 140 }
 141
 142 static struct comedi_driver fl512_driver = {
 143         .driver_name    = "fl512",
 144         .module         = THIS_MODULE,
 145         .attach         = fl512_attach,
 146         .detach         = comedi_legacy_detach,
 147 };
 148 module_comedi_driver(fl512_driver);
 149
 150 MODULE_AUTHOR("Comedi http://www.comedi.org");
 151 MODULE_DESCRIPTION("Comedi low-level driver");
 152 MODULE_LICENSE("GPL");