linux/drivers/staging/comedi/drivers/adv_pci1723.c
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   1/*
   2 * adv_pci1723.c
   3 * Comedi driver for the Advantech PCI-1723 card.
   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: adv_pci1723
  21 * Description: Advantech PCI-1723
  22 * Author: yonggang <rsmgnu@gmail.com>, Ian Abbott <abbotti@mev.co.uk>
  23 * Devices: (Advantech) PCI-1723 [adv_pci1723]
  24 * Updated: Mon, 14 Apr 2008 15:12:56 +0100
  25 * Status: works
  26 *
  27 * Configuration Options: not applicable, uses comedi PCI auto config
  28 *
  29 * Subdevice 0 is 8-channel AO, 16-bit, range +/- 10 V.
  30 *
  31 * Subdevice 1 is 16-channel DIO.  The channels are configurable as
  32 * input or output in 2 groups (0 to 7, 8 to 15). Configuring any
  33 * channel implicitly configures all channels in the same group.
  34 *
  35 * TODO:
  36 * 1. Add the two milliamp ranges to the AO subdevice (0 to 20 mA,
  37 *    4 to 20 mA).
  38 * 2. Read the initial ranges and values of the AO subdevice at
  39 *    start-up instead of reinitializing them.
  40 * 3. Implement calibration.
  41 */
  42
  43#include <linux/module.h>
  44#include <linux/pci.h>
  45
  46#include "../comedidev.h"
  47
  48/*
  49 * PCI Bar 2 I/O Register map (dev->iobase)
  50 */
  51#define PCI1723_AO_REG(x)               (0x00 + ((x) * 2))
  52#define PCI1723_BOARD_ID_REG            0x10
  53#define PCI1723_BOARD_ID_MASK           (0xf << 0)
  54#define PCI1723_SYNC_CTRL_REG           0x12
  55#define PCI1723_SYNC_CTRL_ASYNC         (0 << 0)
  56#define PCI1723_SYNC_CTRL_SYNC          (1 << 0)
  57#define PCI1723_CTRL_REG                0x14
  58#define PCI1723_CTRL_BUSY               (1 << 15)
  59#define PCI1723_CTRL_INIT               (1 << 14)
  60#define PCI1723_CTRL_SELF               (1 << 8)
  61#define PCI1723_CTRL_IDX(x)             (((x) & 0x3) << 6)
  62#define PCI1723_CTRL_RANGE(x)           (((x) & 0x3) << 4)
  63#define PCI1723_CTRL_GAIN               (0 << 3)
  64#define PCI1723_CTRL_OFFSET             (1 << 3)
  65#define PCI1723_CTRL_CHAN(x)            (((x) & 0x7) << 0)
  66#define PCI1723_CALIB_CTRL_REG          0x16
  67#define PCI1723_CALIB_CTRL_CS           (1 << 2)
  68#define PCI1723_CALIB_CTRL_DAT          (1 << 1)
  69#define PCI1723_CALIB_CTRL_CLK          (1 << 0)
  70#define PCI1723_CALIB_STROBE_REG        0x18
  71#define PCI1723_DIO_CTRL_REG            0x1a
  72#define PCI1723_DIO_CTRL_HDIO           (1 << 1)
  73#define PCI1723_DIO_CTRL_LDIO           (1 << 0)
  74#define PCI1723_DIO_DATA_REG            0x1c
  75#define PCI1723_CALIB_DATA_REG          0x1e
  76#define PCI1723_SYNC_STROBE_REG         0x20
  77#define PCI1723_RESET_AO_STROBE_REG     0x22
  78#define PCI1723_RESET_CALIB_STROBE_REG  0x24
  79#define PCI1723_RANGE_STROBE_REG        0x26
  80#define PCI1723_VREF_REG                0x28
  81#define PCI1723_VREF_NEG10V             (0 << 0)
  82#define PCI1723_VREF_0V                 (1 << 0)
  83#define PCI1723_VREF_POS10V             (3 << 0)
  84
  85static int pci1723_ao_insn_write(struct comedi_device *dev,
  86                                 struct comedi_subdevice *s,
  87                                 struct comedi_insn *insn,
  88                                 unsigned int *data)
  89{
  90        unsigned int chan = CR_CHAN(insn->chanspec);
  91        int i;
  92
  93        for (i = 0; i < insn->n; i++) {
  94                unsigned int val = data[i];
  95
  96                outw(val, dev->iobase + PCI1723_AO_REG(chan));
  97                s->readback[chan] = val;
  98        }
  99
 100        return insn->n;
 101}
 102
 103static int pci1723_dio_insn_config(struct comedi_device *dev,
 104                                   struct comedi_subdevice *s,
 105                                   struct comedi_insn *insn,
 106                                   unsigned int *data)
 107{
 108        unsigned int chan = CR_CHAN(insn->chanspec);
 109        unsigned int mask = (chan < 8) ? 0x00ff : 0xff00;
 110        unsigned short mode = 0x0000;           /* assume output */
 111        int ret;
 112
 113        ret = comedi_dio_insn_config(dev, s, insn, data, mask);
 114        if (ret)
 115                return ret;
 116
 117        if (!(s->io_bits & 0x00ff))
 118                mode |= PCI1723_DIO_CTRL_LDIO;  /* low byte input */
 119        if (!(s->io_bits & 0xff00))
 120                mode |= PCI1723_DIO_CTRL_HDIO;  /* high byte input */
 121        outw(mode, dev->iobase + PCI1723_DIO_CTRL_REG);
 122
 123        return insn->n;
 124}
 125
 126static int pci1723_dio_insn_bits(struct comedi_device *dev,
 127                                 struct comedi_subdevice *s,
 128                                 struct comedi_insn *insn,
 129                                 unsigned int *data)
 130{
 131        if (comedi_dio_update_state(s, data))
 132                outw(s->state, dev->iobase + PCI1723_DIO_DATA_REG);
 133
 134        data[1] = inw(dev->iobase + PCI1723_DIO_DATA_REG);
 135
 136        return insn->n;
 137}
 138
 139static int pci1723_auto_attach(struct comedi_device *dev,
 140                               unsigned long context_unused)
 141{
 142        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 143        struct comedi_subdevice *s;
 144        unsigned int val;
 145        int ret;
 146        int i;
 147
 148        ret = comedi_pci_enable(dev);
 149        if (ret)
 150                return ret;
 151        dev->iobase = pci_resource_start(pcidev, 2);
 152
 153        ret = comedi_alloc_subdevices(dev, 2);
 154        if (ret)
 155                return ret;
 156
 157        s = &dev->subdevices[0];
 158        s->type         = COMEDI_SUBD_AO;
 159        s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
 160        s->n_chan       = 8;
 161        s->maxdata      = 0xffff;
 162        s->range_table  = &range_bipolar10;
 163        s->insn_write   = pci1723_ao_insn_write;
 164
 165        ret = comedi_alloc_subdev_readback(s);
 166        if (ret)
 167                return ret;
 168
 169        /* synchronously reset all analog outputs to 0V, +/-10V range */
 170        outw(PCI1723_SYNC_CTRL_SYNC, dev->iobase + PCI1723_SYNC_CTRL_REG);
 171        for (i = 0; i < s->n_chan; i++) {
 172                outw(PCI1723_CTRL_RANGE(0) | PCI1723_CTRL_CHAN(i),
 173                     PCI1723_CTRL_REG);
 174                outw(0, dev->iobase + PCI1723_RANGE_STROBE_REG);
 175
 176                outw(0x8000, dev->iobase + PCI1723_AO_REG(i));
 177                s->readback[i] = 0x8000;
 178        }
 179        outw(0, dev->iobase + PCI1723_SYNC_STROBE_REG);
 180
 181        /* disable syncronous control */
 182        outw(PCI1723_SYNC_CTRL_ASYNC, dev->iobase + PCI1723_SYNC_CTRL_REG);
 183
 184        s = &dev->subdevices[1];
 185        s->type         = COMEDI_SUBD_DIO;
 186        s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 187        s->n_chan       = 16;
 188        s->maxdata      = 1;
 189        s->range_table  = &range_digital;
 190        s->insn_config  = pci1723_dio_insn_config;
 191        s->insn_bits    = pci1723_dio_insn_bits;
 192
 193        /* get initial DIO direction and state */
 194        val = inw(dev->iobase + PCI1723_DIO_CTRL_REG);
 195        if (!(val & PCI1723_DIO_CTRL_LDIO))
 196                s->io_bits |= 0x00ff;   /* low byte output */
 197        if (!(val & PCI1723_DIO_CTRL_HDIO))
 198                s->io_bits |= 0xff00;   /* high byte output */
 199        s->state = inw(dev->iobase + PCI1723_DIO_DATA_REG);
 200
 201        return 0;
 202}
 203
 204static struct comedi_driver adv_pci1723_driver = {
 205        .driver_name    = "adv_pci1723",
 206        .module         = THIS_MODULE,
 207        .auto_attach    = pci1723_auto_attach,
 208        .detach         = comedi_pci_detach,
 209};
 210
 211static int adv_pci1723_pci_probe(struct pci_dev *dev,
 212                                 const struct pci_device_id *id)
 213{
 214        return comedi_pci_auto_config(dev, &adv_pci1723_driver,
 215                                      id->driver_data);
 216}
 217
 218static const struct pci_device_id adv_pci1723_pci_table[] = {
 219        { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1723) },
 220        { 0 }
 221};
 222MODULE_DEVICE_TABLE(pci, adv_pci1723_pci_table);
 223
 224static struct pci_driver adv_pci1723_pci_driver = {
 225        .name           = "adv_pci1723",
 226        .id_table       = adv_pci1723_pci_table,
 227        .probe          = adv_pci1723_pci_probe,
 228        .remove         = comedi_pci_auto_unconfig,
 229};
 230module_comedi_pci_driver(adv_pci1723_driver, adv_pci1723_pci_driver);
 231
 232MODULE_AUTHOR("Comedi http://www.comedi.org");
 233MODULE_DESCRIPTION("Advantech PCI-1723 Comedi driver");
 234MODULE_LICENSE("GPL");
 235
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