LXR linux/drivers/comedi/drivers/fl512.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * fl512.c
   4 * Anders Gnistrup <ex18@kalman.iau.dtu.dk>
   5 *
   6 * COMEDI - Linux Control and Measurement Device Interface
   7 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   8 */
   9
  10/*
  11 * Driver: fl512
  12 * Description: unknown
  13 * Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
  14 * Devices: [unknown] FL512 (fl512)
  15 * Status: unknown
  16 *
  17 * Digital I/O is not supported.
  18 *
  19 * Configuration options:
  20 *   [0] - I/O port base address
  21 */
  22
  23#include <linux/module.h>
  24#include "../comedidev.h"
  25
  26#include <linux/delay.h>
  27
  28/*
  29 * Register I/O map
  30 */
  31#define FL512_AI_LSB_REG                0x02
  32#define FL512_AI_MSB_REG                0x03
  33#define FL512_AI_MUX_REG                0x02
  34#define FL512_AI_START_CONV_REG         0x03
  35#define FL512_AO_DATA_REG(x)            (0x04 + ((x) * 2))
  36#define FL512_AO_TRIG_REG(x)            (0x04 + ((x) * 2))
  37
  38static const struct comedi_lrange range_fl512 = {
  39        4, {
  40                BIP_RANGE(0.5),
  41                BIP_RANGE(1),
  42                BIP_RANGE(5),
  43                BIP_RANGE(10),
  44                UNI_RANGE(1),
  45                UNI_RANGE(5),
  46                UNI_RANGE(10)
  47        }
  48};
  49
  50static int fl512_ai_insn_read(struct comedi_device *dev,
  51                              struct comedi_subdevice *s,
  52                              struct comedi_insn *insn,
  53                              unsigned int *data)
  54{
  55        unsigned int chan = CR_CHAN(insn->chanspec);
  56        unsigned int val;
  57        int i;
  58
  59        outb(chan, dev->iobase + FL512_AI_MUX_REG);
  60
  61        for (i = 0; i < insn->n; i++) {
  62                outb(0, dev->iobase + FL512_AI_START_CONV_REG);
  63
  64                /* XXX should test "done" flag instead of delay */
  65                usleep_range(30, 100);
  66
  67                val = inb(dev->iobase + FL512_AI_LSB_REG);
  68                val |= (inb(dev->iobase + FL512_AI_MSB_REG) << 8);
  69                val &= s->maxdata;
  70
  71                data[i] = val;
  72        }
  73
  74        return insn->n;
  75}
  76
  77static int fl512_ao_insn_write(struct comedi_device *dev,
  78                               struct comedi_subdevice *s,
  79                               struct comedi_insn *insn,
  80                               unsigned int *data)
  81{
  82        unsigned int chan = CR_CHAN(insn->chanspec);
  83        unsigned int val = s->readback[chan];
  84        int i;
  85
  86        for (i = 0; i < insn->n; i++) {
  87                val = data[i];
  88
  89                /* write LSB, MSB then trigger conversion */
  90                outb(val & 0x0ff, dev->iobase + FL512_AO_DATA_REG(chan));
  91                outb((val >> 8) & 0xf, dev->iobase + FL512_AO_DATA_REG(chan));
  92                inb(dev->iobase + FL512_AO_TRIG_REG(chan));
  93        }
  94        s->readback[chan] = val;
  95
  96        return insn->n;
  97}
  98
  99static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 100{
 101        struct comedi_subdevice *s;
 102        int ret;
 103
 104        ret = comedi_request_region(dev, it->options[0], 0x10);
 105        if (ret)
 106                return ret;
 107
 108        ret = comedi_alloc_subdevices(dev, 2);
 109        if (ret)
 110                return ret;
 111
 112        /* Analog Input subdevice */
 113        s = &dev->subdevices[0];
 114        s->type         = COMEDI_SUBD_AI;
 115        s->subdev_flags = SDF_READABLE | SDF_GROUND;
 116        s->n_chan       = 16;
 117        s->maxdata      = 0x0fff;
 118        s->range_table  = &range_fl512;
 119        s->insn_read    = fl512_ai_insn_read;
 120
 121        /* Analog Output subdevice */
 122        s = &dev->subdevices[1];
 123        s->type         = COMEDI_SUBD_AO;
 124        s->subdev_flags = SDF_WRITABLE;
 125        s->n_chan       = 2;
 126        s->maxdata      = 0x0fff;
 127        s->range_table  = &range_fl512;
 128        s->insn_write   = fl512_ao_insn_write;
 129
 130        return comedi_alloc_subdev_readback(s);
 131}
 132
 133static struct comedi_driver fl512_driver = {
 134        .driver_name    = "fl512",
 135        .module         = THIS_MODULE,
 136        .attach         = fl512_attach,
 137        .detach         = comedi_legacy_detach,
 138};
 139module_comedi_driver(fl512_driver);
 140
 141MODULE_AUTHOR("Comedi https://www.comedi.org");
 142MODULE_DESCRIPTION("Comedi low-level driver");
 143MODULE_LICENSE("GPL");
 144